JP7653141B2 - Work support suit with arm support function - Google Patents

Description

The present invention relates to a wearable work support suit with arm work support functions that can assist with bending and straightening the waist and back as well as raising the arms to work for long periods of time in a variety of factory tasks, transporting and handling goods in logistics, nursing care, farm work, and other activities.

In recent years, the number of young workers has decreased, and workers are getting older, placing a greater burden on them. In addition, workers at factories and other workplaces are also aging. These types of work, as well as logistics work, nursing care, and farm work, put a lot of strain on the legs and back, and repeated overwork can lead to back pain and joint pain.
Postures during work include postures that involve the trunk, such as bending forward or squatting, as well as postures that involve the arms, such as lifting loads upwards, lowering loads from above, or working with the arms raised for long periods of time on an overhead object.
Excellent work support suits that support work postures that involve the trunk, such as bending forward or squatting, are known, such as those disclosed in JP 2017-064335 (Patent No. 6671746).
However, while work support suits such as those disclosed in JP 2017-064335 A (Patent No. 6,671,746) are excellent at supporting work that involves the trunk, such as bending over or squatting, they do not have the functionality to support work that involves the arms.
In the prior art, various arm work support suits are known that aim to reduce the burden on a worker when performing arm work.

A conventional arm work support suit is disclosed in Patent Document 1.
Patent Document 1, disclosed in JP 2009-106270 A, discloses a work support tool of a type that supports an arm rest from the side via an elastic member.
As shown in Figure 20(a), the work support device disclosed in Patent Document 1 comprises a torso fixing part that is attached to the torso of a worker, an arm receiving part that receives and supports the worker's arm, and a long elastic member that is formed in an elongated shape and has a lower end fixed to the torso fixing part and an upper end fixed to the arm receiving part, and is disposed between the torso fixing part and the arm receiving part.
The work support device in Patent Document 1 is specialized for grape cultivation and the like, and is a technology that can be applied when the arms are raised to a certain height and maintained in the same position.

Next, Patent Document 2, disclosed in JP 2011-188896 A, also discloses a type of auxiliary suit that supports arm rests from the sides via elastic members.
As shown in Fig. 20(b), the support suit disclosed in Patent Document 2 has muscle strength assisting devices 1101 worn between two locations: the lower parts of the left and right upper arms and both sides of the waist. Both tip portions of muscle strength assisting device 1101 are connected to upper arm belt 1109 and waist belt 1108 via fasteners 1102, 1102, respectively. Upper arm belt 1109 and waist belt 1108 are sewn to body suit 1103.
The support suit in Patent Document 2 is a technology that can be applied when the arms are raised to a certain height and maintained in the same position.

Next, Patent Document 3, disclosed in JP 2017-089032 A, discloses an auxiliary suit in which a belt that pulls up a bracelet is suspended from the shoulder.
As shown in Figure 21 (a), the auxiliary suit disclosed in Patent Document 3 comprises an auxiliary belt with an elastic portion that stretches in the longitudinal direction, a guide portion that guides the auxiliary belt so that it passes around the wearer's right shoulder, back, left armpit, chest, right armpit, back and left shoulder in the same or reverse order, a right connecting portion that is connected to the right end portion of the auxiliary belt that extends from the right shoulder forward and is attached to the wearer's right forearm, and a left connecting portion that is connected to the left end portion of the auxiliary belt that extends from the left shoulder forward and is attached to the wearer's left forearm.
The auxiliary suit in Patent Document 3 is wrapped around the back and torso like a sash, and elastic bodies suspended forward from the shoulders are wrapped around the elbows and arms to pull the arms upward.

Next, Patent Document 4, disclosed in JP 2017-192719 A, also discloses an auxiliary suit in which a belt that pulls up the bracelet hangs from the shoulder.
As shown in Fig. 21(b), the auxiliary suit disclosed in Patent Document 4 has a structure including arm support parts, arm and back auxiliary belt parts that support and lift the arm support parts, extend over the shoulders to the back and around the waist, and an arm and back belt fastener part that is connected to the arm and back auxiliary belt parts and fastens to the chest plate, abdominal belt, waist belt and/or waist belt to adjust the auxiliary position, auxiliary angle and auxiliary strength of the arm and back support. At least a part of the arm and back auxiliary belt from the arm support parts to the arm and back belt fastener part is made of elastic material.
As shown in Figure 21(b), the support suit of Patent Document 4 has an arm and back motion support device 20 with an arm and back support belt 18 supporting the forearm, and as shown by arrow A in Figure 21(b), the forearm side elbow support device 14, wrist support device 12 and connecting support device 13 connecting them are pulled up with the arm contact point of the forearm side elbow support device 14 as a fulcrum.

JP 2009-106270 A JP 2011-188896 A JP 2017-089032 A JP 2017-192719 A

The type of support suit shown in Patent Documents 1 and 2, which supports the arm rests from the sides via elastic members, can be inconvenient when working in a fixed posture. When raising and lowering the arms, such as when lifting and lowering luggage, the elastic members supporting the arm rests can get in the way, and elastic force can be applied in a direction that impedes the intended movement. Conventional wearable support devices that do not incorporate elastic bodies or actuators rely entirely on the muscle strength of the worker for the force required for work, and while they may provide support in certain postures and directions, they are unable to reduce the workload of workers with weak muscles, such as elderly people or women, if they are likely to be in the way and stressful for other postures and directions. In addition, the mere presence of rod-shaped elastic members under the armpits can be unnatural, and it is conceivable that they will get in the way and cause stress for the worker.

Next, in the support suits shown in Patent Documents 3 and 4, elastic strings or the like hang from the shoulders, and the elastic force of the strings is applied as a force that pulls the elbows, upper arms, and wrists upwards. Therefore, when the worker starts with his arms lowered, it can be said that the suit supports the loading and unloading work at the moment when he lifts the load from the bottom up. However, once the arms are stretched out, if the next movement is to lower the arms, the elastic force works in the opposite direction when the arms are moved downwards, and if the arms are repeatedly raised and lowered, the elastic force can actually become a load when the arms are lowered. Also, the mere presence of elastic members in front of the arms creates an uncomfortable feeling, and it can be expected that it will get in the way and cause stress for the worker.

The present inventor has developed a work support suit that supports the movements of a worker according to the present invention, taking into consideration the following points.
(1) No components are placed on the user's elbow or in front of the arm (in front of the biceps).
Since users move their arms in various ways while adopting various working postures, it is conceivable that if components are arranged in front of the user's elbow or arm (in front of the biceps), it may be in the way and cause stress to the worker. Therefore, in the present invention, it is aimed to avoid arranging components in front of the user's elbow or arm (in front of the biceps).
(2) No rod-shaped elastic body or other member that may hinder the movement of the user's elbow or arm is provided on the arm.
Since users move their arms in a variety of ways while adopting various working postures, if rod-shaped elastic bodies or the like are provided to support the user's elbows and arms, movement in one direction may be supported but movement in another direction may be hindered. Therefore, the present invention aims to avoid providing rod-shaped elastic bodies to the user's elbows and arms.
(3) The arms shall not be compressed.
The basis of conventional wearable work support suits that do not use actuators such as motors is to stabilize the body by compressing it tightly, reducing fatigue caused by swaying or shifting of posture, and to support the worker's work by distributing the load concentrated on one part of the body to the whole torso and other large muscles of the body. Conventional technology would apply pressure to the arms using the same principle to stabilize the posture of the arms, but the arms are thin, unlike the torso, and raising the arms up makes it difficult for blood to be supplied. Applying pressure to the arms under such adverse conditions would actually increase fatigue.
Although it is fine to have a supporter attached to the elbow, it is preferable not to place other components directly on the arm. Therefore, in this invention, we aimed to avoid placing components directly on the user's elbow or arm as much as possible, and to leave them as close to free as possible.
The present invention aims to provide a "work support suit with arm work support function" that supports keeping the arms up while not hindering lowering the arms, and further, that places as few components directly on the user's arms as possible, allowing as much freedom as possible.

In order to solve the above problems, the present invention has the following configuration. The components described below can be used in any combination possible. It should be understood that the aspects and technical features of the present invention are not limited to those described below, but are recognized based on the inventive idea described in the entire specification and drawings, or that a person skilled in the art can grasp from those descriptions.

The work support suit of the present invention is configured comprising, as its components, a "back body" to be worn on the back of the worker, "left shoulder strap body" and "right shoulder strap body" for carrying the back body on the worker's back, a "torso body" attached forward from the back body to tighten around the worker's waist, an "elbow body" to tighten around the worker's elbows, one or more "guide parts" on the back body, and a "right arm work support belt" and a "left arm work support belt" having one end attached to either the left or right left shoulder strap or to a part near either the left or right shoulder of the back body, passing through the guide part, and the other end attached to the elbow side part of the elbow body of the opposite arm, either the left or right.
According to the above configuration, the "elbow body" is wrapped around the elbow of the arm, but other components are not directly attached to the arm.

Here, the fact that the device supports the user in keeping the arms up while not hindering the user from lowering the arms down is due to the action of the "arm work support function" described below.
In the above configuration, the "work support suit with arm work support function" of the present invention is equipped with an "arm work support function" in which the contact portions between the other ends of the right arm work support belt and the left arm work support belt, which contact the back body or the user's shoulder blades depending on the height of the posture of the elbow body after passing through the guide section and before reaching the elbow side portion of the elbow body, are formed as temporary support points for the right arm work support belt and the left arm work support belt by the frictional force generated at the contact portions.

In this "arm work support function," the contact parts are not formed fixedly from the beginning, but are formed dynamically during the following movement. In other words, when the user changes the arm posture from the back side to the front side and the elbow body moves forward from a position behind the back body, the contact parts are formed at the points where the "right arm work support belt" and "left arm work support belt" come into contact with the "back body" or the points where the "right arm work support belt" and "left arm work support belt" come into contact with the "user's shoulder blade," which arise according to the height of the posture of the elbow body.
In the above movement, when the arms are moved forward behind the user's back, for example in the "butterfly stroke," the "right arm work support belt" and "left arm work support belt" also move forward following the movement of the user's elbow; however, the "guide part" provided on the back body is fixed, and on the way from the "guide part" to the "elbow body" in the shortest possible distance, they come into contact with the edge of the "back body" and the area near the shoulder blades (near the shoulders), and as the "right arm work support belt" and "left arm work support belt" move forward following the movement of the elbow, the contact points become abutment points and are temporarily supported and fixed in place by frictional force.

In the elastic "right arm work support belt" and "left arm work support belt," temporary contact areas are created near the shoulders, providing the following effects.
First, when a user attempts to lower either the raised upper arm and move the humerus downward (that is, due to the structure of the human body, the humerus, which is embedded in the upper part of the scapula, moves downward away from the scapula), the length from the contact part of the "right arm work support belt" or "left arm work support belt" to the elbow body extends, generating an elastic force in the belt strap part.
In other words, although the arm is not mechanically pulled upwards strongly, the elastic force of the strap portion is applied in a direction (i.e., upward) that suppresses the arm from falling downwards, and the movement of keeping the arm up can be assisted. On the other hand, when moving to the task of lowering the arm, the user simply shifts the arm slightly toward the back (i.e., backwards), and the frictional force at the contact point is released, the "right arm work support belt" or "left arm work support belt" becomes free, the contact point disappears, and the arm becomes free.
Secondly, the elastic force of the "Right Arm Work Support Belt" and "Left Arm Work Support Belt" acts between the elbow and the contact part (near the shoulder), creating a tightening effect on the axis of rotation, making it easier for the upper arm to be supported by the shoulder. In other words, the upper arm, which is inserted into the upper part of the shoulder blade, is tightened against the shoulder blade, and the elastic force of the belt strap works to keep the upper arm in that position.

Next, regarding the left-right balance, the "right arm work support belt" and the "left arm work support belt" in the above configuration are configured to cross left and right at or near the guide part of the back body. This cross structure makes it easier to achieve left-right balance by arranging the "right arm work support belt" or the "left arm work support belt" symmetrically on the back body.
There are at least three ideas for enhancing the arm work support function of the work support suit of the present invention.

The first innovation is to change the straps of the "right arm work support belt" and the "left arm work support belt" to strengthen their elasticity. If the elastic modulus of the elastic body is increased, the elastic force will be greater because the elastic force is calculated by multiplying the stretched length by the elastic modulus.
The second innovation is to increase the number of "right arm work support belts" and "left arm work support belts." Considering the balance between the left and right, it is preferable to provide multiple sets of each.
For example, if the number of sets of "right arm work support belts" and "left arm work support belts" with the same elastic coefficient, etc. is n, an elastic force that is n times the elastic force obtained by one set of "right arm work support belts" and "left arm work support belts" can be obtained.
The third innovation is to provide a "second right arm work support belt" and a "second left arm work support belt" in addition to the "right arm work support belt" and "left arm work support belt" in order to temporarily clamp the shoulders and arms from above and below, and to temporarily clamp the shoulders and arms between the "right arm work support belt" and "left arm work support belt" and the "second right arm work support belt" and "second left arm work support belt."

In the above configuration, in addition to one or more "guide parts," a "second guide part" is provided that is arranged below the guide part in a part of the back body, and a "second right arm work support belt" and a "second left arm work support belt" have one end attached to a part of either the left or right elbow body, pass through the second guide part, and the other end attached to a part of the back body or the torso body.
Here, the position at which the guide unit is disposed is not limited, but for example, the position of the guide unit is set at a height near the cervical vertebrae of the worker, and the position of the second guide unit is set at a position where, when the worker changes his/her arm posture from the rear side to the front side and the elbow body moves forward from a position behind the rear body, the right shoulder of the user is clamped between the "right arm work support belt" and the "second right arm work support belt", and the left shoulder of the user is clamped between the "left arm work support belt" and the "second left arm work support belt".
As an example of the above configuration, the "second right arm work support belt" has one end attached to the elbow body on the right arm side, and the other end attached to a part of the right side of the torso body via a second guide part. Also, the "second left arm work support belt" has one end attached to the elbow body on the left arm side, and the other end attached to a part of the left side of the torso body via a second guide part.

The above is the configuration related to the arm work support function, but of course, the work support suit can also be structured to support bending and straightening the waist.
For example, the back piece may be structured with an elastic body installed inside, and the elastic force of the elastic body may be used to assist the worker's movements.
In the above configuration, an elastic body may be provided inside the back body. In other words, the back body may have one or more elastic bodies arranged in the vertical direction. For example, if an elastic body is arranged along the back muscles, it can support the movement of the lower back and back muscles of the worker.
For example, the elastic body may be a leaf spring structure or a multiplicity of flexible ring plates that are offset and connected in one direction (ring plate structure).
Various types of leaf spring structures can be used. For example, they may be flat metal plates with toughness, or they may be coiled. In the case of a coiled structure, it is preferable to compress them in the thickness direction to prevent the spring from becoming too thick. Alternatively, the spring may be a flexible ring plate, with a number of these being stacked and aligned in one direction while being offset from one another, and connected by means such as crimping, welding, or bonding. While a strong elastic force similar to that of a coiled spring can be obtained, the spring is thin in the thickness direction, and the thickness can be made to be about the same as that of a flat leaf spring.

Furthermore, the work support suit of the present invention can be linked not only to the upper body but also to the lower body, meaning that it can be structured to use leg muscles and knees as a force to support waist movement.
For example, three fastening points, namely, a "right side connector," a "center connector," and a "left side connector," are provided near the worker's waist as fastening points between the back body and the waist, and a "right side fastening strap" and a "left side fastening strap" are arranged using these fastening points.
The "right side fastening strap" is arranged in a V-shape between the right side connector, the right side lower leg body, and the central connector, and the "left side fastening strap" is arranged in a V-shape between the left side connector, the left side lower leg body, and the central connector.
With the above configuration, the elastic member is hung in a so-called W shape, and even if there is a slight difference between the left and right sides of the worker, the left and right "right connector" and "left connector" both go through the "central connector" located in the center of the waist, so the left and right balance is naturally adjusted just like when the left and right sides are crossed.

The work support suit of the present invention can provide a "work support suit with arm work support function" that assists in keeping the arms up while not hindering the arms from being lowered, and further, as far as possible, does not place components directly on the user's arms, allowing as much freedom as possible.
In the "arm work support function" of the work support suit of the present invention, a temporarily supported and fixed contact part is created, so that when the user attempts to lower either the raised upper arm and move the humerus downward, the length from the contact part to the elbow body in the "right arm work support belt" or "left arm work support belt" extends, generating an elastic force in the belt strap part, thereby making it possible to support work in a position with the arm raised up.
In other words, although the arm is not mechanically pulled upwards strongly, the elastic force of the strap portion is applied in a direction that prevents the arm from dropping downwards, i.e., in the upward direction, and the movement of keeping the arm up can be assisted. On the other hand, when moving to the task of lowering the arm, the user simply shifts the arm slightly towards the back (i.e. backwards), and the frictional force at the contact point is released, the "right arm work support belt" or "left arm work support belt" becomes free, the contact point disappears, and the arm becomes free.
The work support suit of the present invention is widely useful as it can assist with work that requires bending and straightening the waist and back, such as various factory tasks, transporting and loading logistics work, nursing care, and farm work.

This is a diagram simply showing the appearance of an example configuration of a work support suit 100 with arm work support function in Example 1 when worn by a worker, as seen from the rear and from the outer surface side. This is a diagram simply showing the appearance of an example configuration of a work support suit 100 with arm work support function in Example 1, as viewed from the inner surface side when worn by a worker, from the side that contacts the back. FIG. 13 is a diagram for simply explaining the formation of the "contact point T". 1 is a diagram simply illustrating how the "arm work support function" is exerted with the temporarily supported and fixed contact point T as the base point. FIG. FIG. 5 is a diagram simply illustrating a state in which the "arm work support function" is exercised in the state shown in FIG. 4. 1A and 1B are diagrams illustrating the principle of keeping a rod-shaped body stationary at an arbitrary angle by the frictional force caused by the tightening effect in the axial direction of the rod-shaped body. 13 is a diagram showing a state in which, when the "arm work support function" is exercised, the user transitions to the task of lowering the arm and the contact point T is eliminated. FIG. 13A and 13B are diagrams showing an example of the configuration of an elastic body 111 attached to a back body 110. This is a diagram simply showing the appearance of an example configuration of a work support suit 100a with arm work support function in Example 2 when worn by a worker, as seen from the rear and from the outer surface side. This is a diagram simply showing the appearance of an example configuration of a work support suit 100a with arm work support function in Example 2, as seen from the inner surface side when worn by a worker, from the side that contacts the back. 13A and 13B are diagrams for briefly explaining the formation of a "second contact point T2". 1 is a diagram simply illustrating how the "arm work support function" is exerted with the temporarily supported and fixed contact point T as the base point. FIG. 13 is a diagram simply illustrating how, when the "arm work support function" is reinforced, the user transitions to the task of lowering the arm and the second contact point T2 is eliminated. FIG. This is a diagram simply showing the appearance of an example configuration of a work support suit 100b with arm work support function in Example 3 when worn by a worker, as seen from the rear and from the outer surface side. This is a diagram simply showing the appearance of an example configuration of a work support suit 100b with arm work support function in Example 3, as viewed from the inner surface side when worn by a worker, from the side that contacts the back. 1A to 1C are diagrams showing the shape (front, right side view, left side view, plan view, and bottom view) of an article based on a work support suit 100 with arm work support function according to Example 1. A figure showing the shape (rear view) of an article based on the work support suit 100 with arm work support function in Example 1. 11A to 11C are diagrams showing the shape (front, right side view, left side view, plan view, and bottom view) of an article based on a work support suit 100b with arm work support function according to Example 3. A figure showing the shape (rear view) of an article based on a work support suit 100b with arm work support function according to Example 3. FIG. 1A is a simplified diagram showing a conventional work support device disclosed in Patent Document 1, JP 2009-106270, and FIG. 1B is a simplified diagram showing a conventional support suit disclosed in Patent Document 2, JP 2011-188896. FIG. 1A is a diagram showing a conventional auxiliary suit according to Patent Document 3 of Japanese Patent Laid-Open No. 2017-089032, and FIG. 1B is a diagram showing a conventional auxiliary suit according to Patent Document 4 of Japanese Patent Laid-Open No. 2017-192719.

Hereinafter, an embodiment of the work support suit with arm work support function of the present invention will be described with reference to the drawings. However, it goes without saying that the scope of the present invention is not limited to the following embodiment.
As Example 1, a work support suit 100 with arm work support function having a basic configuration is shown.
The work support suit 100a with arm work support function of Example 2 has a structure that, in addition to the configuration of Example 1, further includes a second guide section and a second right arm work support belt and a second left arm work support belt, and enhances the "arm work support function" by temporarily clamping the shoulders and arms with the "right arm work support belt" and "left arm work support belt" and the "second right arm work support belt" and "second left arm work support belt."
The work support suit 100b with arm work support function according to the third embodiment has the configurations of the first and second embodiments, and also provides support for the lower body in relation to the worker's working posture.

First, a work support suit 100 with arm work support function according to the first embodiment will be described.
1 and 2 are diagrams briefly illustrating a configuration example of a work support suit 100 with arm work support function according to a first embodiment.
FIG. 1 is a diagram of the outer surface side as seen from the rear when worn by a worker, and FIG. 2 is a diagram of the inner surface side as seen from the side that contacts the back when worn by a worker.
As shown in Figure 1, the work support suit 100 with arm work support function of Example 1 is structured to include a back body 110, a torso body 120, a right shoulder strap body 130R, a left shoulder strap body 130L, an elbow body 140, a guide part 150, a right arm work support belt 160R, and a left arm work support belt 160L.

The torso section 120 of the work support suit with arm work support function 100 is wrapped around the torso when worn, but is shown unfolded in each drawing. The elbow section 140 may be in an unfolded state before wearing, and is wrapped around the elbow when worn, but is shown in a wrapped state after wearing in each drawing.

The back body 110 is a member that covers at least the back of the worker in the work support suit with arm work support function 100. It may be configured integrally with the torso body 120.
The material for the main body of the back panel 110 is not particularly limited, but is preferably a durable, breathable, and lightweight material. In addition, a material with some cushioning is more suitable for long-term wear.

The torso body 120 is long on both sides, with a left torso body 120L and a right torso body 120R, and this length allows it to go around the torso of the worker and tighten. Since it is integrated with the main body 111 of the back body 110, depending on how you look at it, you could also say that the central torso body 120C exists between the left torso body 120L and the right torso body 120R.

In addition, the left and right torso bodies 120L and 120R are preferably provided with a fastening structure that allows the length to be adjusted according to the worker's waist size. For example, a male and female hook-and-loop fastener that can be attached and detached may be used. In this example, as shown in FIG. 1, hook-and-loop fasteners 122L and 122R are provided on the outer surface of the left and right torso bodies 120L and 120R, respectively, and as shown in FIG. 2, hook-and-loop fasteners 123L and 123R are provided on the inner surface of the left and right torso bodies 120L and 120R. Note that four hook-and-loop fasteners are provided so that it can be used by both right-handed and left-handed people, but for example, only 122L and 123R (overlapping on the upper right) may be used for right-handed people.

Next, the left and right shoulder straps 130 will be described.
The shoulder straps 130 are preferably made of a strong elastic material.
In this example, the shoulder straps 130 include a pair of left and right shoulder straps 130L and 130R.
The left shoulder strap 130L and the right shoulder strap 130R have one ends that continue from the left and right shoulder areas of the back body 110 to the front and are hung on the left and right shoulders of the user, and the other lower ends are attached to the torso body 120.

It is preferable that the left shoulder strap 130L and the right shoulder strap 130R have a structure that allows easy length adjustment, so in this example, the other end of the right shoulder strap 130R and the other end of the left shoulder strap 130L have a buckle structure for adjusting the length. If the length is to be adjusted, the other end of the right shoulder strap 130R and the other end of the left shoulder strap 130L and the other end of the left shoulder strap 130L may each be a detachable male and female hook-and-loop fastener.

On the other hand, the torso body 120 has a location where the other ends of the left shoulder strap 130L and right shoulder strap 130R, which will be described later, are attached. Here, the other end of the left fastening part 121L is detachably attached to the left torso body 120L, and the other end of the right fastening part 121R is detachably attached to the right torso body 120R.

The elbow body 140 is a member that tightens the area around the elbow of the user. Here, there are two elbow bodies: a right elbow body 140R that is attached to the elbow of the right arm of the user, and a left elbow body 140L that is attached to the elbow of the left arm of the user.
The right elbow body 140R and the left elbow body 140L are members that are wrapped around the elbows of the worker and attached to the elbows. In order not to impede the movement of the elbow joint, the right elbow body 140R and the left elbow body 140L are provided with belt pieces that are attached by wrapping around the front and rear ends of the body, i.e., the front and rear sides of the elbows, respectively, and are structured so that the body can be detachably attached to the elbows while ensuring the movement of the elbow joint by wrapping the belt pieces around the body.

The guide part 150 may be any part that slidably supports the right arm work support belt 160R and the left arm work support belt 160L described later. For example, the guide part may be a loop-shaped belt material formed at a predetermined position on the back body, a loop-shaped dedicated metal fitting formed on the surface of the back body 110, or a combination of these. The guide part 150 may be sewn to the surface of the back body 110, or may be detachably attached.
Regarding the position of the guide portion 150, at least one is provided near the upper portion of the back body 110, at a height near the cervical vertebrae of the operator.

The work support suit 100 with arm work support function of the present invention has an arm work support function, and includes a left shoulder strap 160L and a right shoulder strap 160R as important parts of this arm work support function.
The right arm work support belt 160R has one end attached to the left shoulder strap body 130L or a part of the back body 110 near the left shoulder, passes slidably through the guide part 150 along the way, and the other end is a belt attached to the right arm elbow body 140R on the opposite side to the one end.
The left arm work support belt 160L has one end attached to the right shoulder strap body 130R or a part of the back body 110 near the right shoulder, passes slidably through the guide part 150 along the way, and the other end is a belt attached to the left arm elbow body 140L on the opposite side to the one end.
Right arm work support belt 160R and left arm work support belt 160L each have an elastic strap portion at least near the other end (near elbow body 140). The elasticity of this strap portion is used as a force for exerting the arm work support function, as described below.

The "arm work support function" of the work support suit 100 with arm work support function according to Example 1 is such that, in the above configuration, one end of the right arm work support belt 160R is attached to the left shoulder strap 130L or a part of the back body 110 near the left shoulder, slidably passes through the guide part 150 on the way, and the other end is attached to the elbow body 140R of the right arm on the opposite side to the one end, but an "abutment point" is formed between the guide part 150 and the elbow body 140R of the right arm where it is temporarily fixed. Similarly, it is important that one end of the left arm work support belt 160L is attached to the right shoulder strap 130L or a part of the back body 110 near the right shoulder, slidably passes through the guide part 150 on the way, and the other end is attached to the elbow body 140L of the left arm on the opposite side to the one end, but an "abutment point" is formed between the guide part 150 and the elbow body 140L of the left arm where it is temporarily fixed.

FIG. 3 is a diagram for simply explaining the formation of this "contact point T."
As shown in FIG. 3(a), the "contact point" is dynamically formed in response to the movement of the user's arm.
In other words, in this "arm work support function," the contact portion is not formed fixedly from the beginning, but is formed dynamically during the following movements.
A typical user movement is when the user changes the arm posture from the back side to the front side, and the elbow body 140 moves from a position behind the back body 110 to the front side. The right arm work support belt 160R and the left arm work support belt 160L follow the movement of the right elbow body 140R and the left elbow body 140L, respectively, but a contact point is formed at the point where the right arm work support belt 160R and the edge of the back body 110 contact, or at the point where the right arm work support belt 160R and the user's shoulder blade contact. The contact point is generated according to the height of the user's arm movement. Similarly, a contact point T is formed at the point where the left arm work support belt 160L and the edge of the back body 110 contact, or at the point where the left arm work support belt 160L and the user's shoulder blade contact. The height at which the contact point T occurs is generated according to the height of the user's arm movement.

As shown in Fig. 3(a) and Fig. 3(b), in the above movement, when the user moves their arms forward behind their back, for example in the "butterfly stroke," the right arm work support belt 160R and the left arm work support belt 160L also move forward following the movement of the user's elbow. However, the guide part 150 provided on the back body 110 is fixed, and in the course of connecting the guide part 150 to the right elbow body 140R and the guide part 150 to the left elbow body 140L in the shortest distance, they come into contact with the edge of the back body 110 or the vicinity of the shoulder blade of the user's body, and as the right arm work support belt 160R and the left arm work support belt 160L move forward following the movement of the elbow, the contact point becomes the abutment point T, and they are temporarily supported and fixed by friction.

FIG. 4 is a simplified diagram showing how the action shown in FIG. 3 produces a temporarily supported and fixed contact point T, and the arm is then further extended forward to provide an "arm work support function."
Following the movements shown in Figures 3(a) and 3(b), by extending the arms forward as shown in Figure 4(a), the right arm work support belt 160R and the left arm work support belt 160L move forward in response to the movement of the elbow, with the contact point T as the base point, and an elastic force is generated from the elbow toward the shoulder joint, as shown in Figure 4(b).

As a result, an "arm work support function" is obtained.
The principle of the "arm work support function" can be explained by the following two actions.
The first function is to suppress downward movement.
As shown in Figure 5, when a user attempts to lower either the left or right upper arm that is raised above in order to move the humerus downward (that is, due to the structure of the human body, the humerus, which is embedded in the upper part of the scapula, moves downward away from the scapula), the distance from the contact point T of the right arm work support belt 160R or left arm work support belt 160L to the right elbow body 140R or left elbow body 140L becomes longer, and the structure is such that an elastic force is generated in the belt strap portion in proportion to that length.
When the arm is raised forward and upward as shown by the dotted line in Fig. 5(a), the elbow body 140 is maintained at a relatively high position, but when the upper arm is lowered as shown by the solid line in Fig. 5(b), the position of the elbow body 140 drops downward, and at that time the humerus separates from the scapula, resulting in a so-called dropped shoulder. However, since the position of the contact point T does not change, the length from the contact point T to the elbow body 140 increases, and an elastic force is generated in the strap portion of the right arm work support belt 160R or the left arm work support belt 160L. In other words, an elastic force that tries to keep the elbow body 140 up is generated in the elbow body 140, giving the sensation that the arm is being pulled upward. This is the "arm work support function" of the work support suit 100 with arm work support function, which is caused by the elastic force of the strap portion of the right arm work support belt 160R or the left arm work support belt 160L.

The second action is that a tightening effect occurs between the elbow and the contact part (near the shoulder), making it easier for the upper arm to be supported by the shoulder. In other words, the humerus, which is inserted into the upper part of the scapula, is tightened against the scapula, and the elasticity of the belt strap acts to keep the upper arm in that position.
Figure 6(a) is an excerpt from a publication showing an example of the tightening effect in a mechanical structure. Figure 6(a) is an excerpt from U.S. Patent No. 10,233,618. It shows how a faucet that can rotate around its axis can be stopped at any angle by tightening the faucet by generating elastic force in the core material of the faucet.
Similar to this principle, as shown in Figure 6 (b), an elastic force acts on the elbow body 140 in the direction of the contact point T, that is, in the direction in which the humerus is pulled toward the scapula. As a result, the humerus is tightened against the shoulder joint within the scapula, which corresponds to the axis of rotation, making it easier to maintain the posture at an angle protruding forward.

FIG. 7 is a diagram showing a state in which, in a state in which the "arm work support function" is exercised, the user moves to the task of lowering the arm and the contact point T is eliminated.
As shown in Figure 7, when the arm is returned in the opposite direction to Figures 3 and 4, that is, when the arm is rotated backwards and lowered like the opposite movement of the butterfly stroke, the user only needs to shift the arm slightly toward the back (i.e. backward), and the contact point T is released, the right arm work support belt 160R or the left arm work support belt 160L becomes free, the contact point T disappears, and the arm returns to a free state. In other words, the elastic force that tries to maintain the position of the elbow body 140 disappears from the elbow body 140, and the feeling that the arm is being pulled upward disappears. This is the elimination of the "arm work support function" of the work support suit 100 with arm work support function, which is caused by the elastic force of the strap portion of the right arm work support belt 160R or the left arm work support belt 160L.

Regarding correction of the balance between the left and right sides of the user's body, the right arm work support belt 160R or the left arm work support belt 160L is structured so that they cross each other around the guide section 150, as shown in FIG. 1, so that even if there is a slight difference between the left and right sides of the worker's body, the balance between the left and right sides can be naturally adjusted and the load balance can be corrected.
In addition, in the configuration of Example 1, when strengthening the arm work support function, it is possible to increase the number of sets of the right arm work support belt 160R and the left arm work support belt 160L. In other words, if n sets are provided, the elastic force exerted by the arm work support function becomes n times.

In addition, the work support suit 100 with arm work support function is preferably structured to support not only arm work but also the basic movement of bending and straightening the waist. For example, the suit may be structured with an elastic body installed inside the back body 110, and the elastic force of the elastic body may be used to support the worker's movements.
8 is a diagram showing an example of a configuration in which an elastic body 111 is installed inside the back body 110. In other words, the back body 110 is provided with one or more elastic bodies 111 arranged in the vertical direction. For example, by arranging the elastic body 111 along the vicinity of the back muscles, it is possible to support the movement of the lower back and back muscles of the worker.
The elastic body 111 may be a leaf spring structure or a number of flexible ring plates that are offset and stacked and connected in one direction (ring plate structure).

As shown in Figure 8, various types of leaf spring structures can be used. For example, they may be flat plates of tough metal, or they may be coiled. In the case of a coiled structure, it is preferable to compress them in the thickness direction to prevent them from becoming too thick. Alternatively, they may be flexible ring plates, with multiple of them being offset from one another and stacked in one direction and connected by means such as crimping, welding or gluing. While a strong elastic force similar to that of a coiled spring can be obtained, they are thin in the thickness direction, and can be made to be about the same thickness as a flat leaf spring.

As described above, according to the work support suit 100 with arm work support function shown in Example 1, the "arm work support function" creates a contact point T that is temporarily supported and fixed, so when the user attempts to lower either the left or right upper arm that is raised above and move the humerus downward, the distance from the contact point T on the right arm work support belt 160R or left arm work support belt 160L to the right elbow body 140R or left elbow body 140L becomes longer, and the structure is such that an elastic force is generated in the belt strap portion in proportion to that length.
In other words, although the arm is not mechanically pulled upwards strongly, the elastic force of the strap portion is applied in a direction (i.e., upward) that suppresses the arm from falling downwards, and the movement of keeping the arm up can be assisted. On the other hand, when moving to the task of lowering the arm, the user simply shifts the arm slightly toward the back (i.e., backwards) to release the frictional force of the contact point T, and the right arm work support belt 160R or left arm work support belt 160L becomes free, the contact point T disappears, and the arm becomes free.

A work support suit 100a with arm work support function according to Example 2 will be described.
The work support suit 100a with arm work support function of Example 2 has a structure that, in addition to the configuration of Example 1, further includes a second guide section and a second right arm work support belt and a second left arm work support belt, and enhances the "arm work support function" by temporarily clamping the shoulders and arms with the "right arm work support belt" and "left arm work support belt" and the "second right arm work support belt" and "second left arm work support belt."
Here, the explanation of the parts similar to those in the first embodiment, such as the back body 110, the torso body 120, the shoulder strap body 130, and the elbow body 140, will be omitted as appropriate, and the other parts that are different will be explained in detail.

9 and 10 are diagrams simply illustrating an example of the configuration of a work support suit 100a according to the second embodiment.
FIG. 9 is a diagram of the outer surface side as seen from the rear when worn by a worker, and FIG. 10 is a diagram of the inner surface side as seen from the side that contacts the back when worn by a worker.
As shown in Figures 9 and 10, the work support suit with arm work support function 100a of Example 2 is similar to Figures 1 and 2 shown in Example 1 in that it has a structure including a back body 110, a torso body 120, a right shoulder strap body 130R, a left shoulder strap body 130L, an elbow body 140, a guide part 150, a right arm work support belt 160R, and a left arm work support belt 160L, and further includes a second guide part 160, a second right arm work support belt 180R, and a second left arm work support belt 180L.
In each drawing, the torso 120 of the work support suit with arm work support function 100a is wrapped around the torso when worn, but is shown unfolded in each drawing. Also, the elbow body 140 may be in an unfolded state before wearing, and is wrapped around the elbow when worn, but is shown in a wrapped state after wearing in each drawing.

The second guide portion 170 may be a second guide portion disposed below the guide portion 150 in a part of the back body 110 in addition to the one or more guide portions 150 shown in the first embodiment, and may slidably support the second right arm work support belt 180R and the second left arm work support belt 180L described later. For example, like the guide portion 150, the second guide portion 170 may be a loop-shaped belt material formed at a predetermined position on the back body 110, a loop-shaped dedicated metal fitting formed on the surface of the back body 110, or a combination of these. The second guide portion 170 may be sewn to the surface of the back body 110, or may be detachably attached.
The second guide portion 170 is disposed near the center of the back body 110, below the guide portion 150. For example, it is disposed at a height near the center of the back of the operator.

The second right arm work support belt 180R is a belt having one end attached to a portion of the right elbow body 140R, slidably passing through the second guide portion 170 along the way, and having the other end attached to a portion of the back body 110 or the torso body 120.
The second left arm work support belt 180L is a belt having one end attached to a part of the left elbow body 140L, slidably passing through the second guide part 170 along the way, and having the other end attached to a part of the back body 110 or the torso body 120.
Second right arm work support belt 180R and second left arm work support belt 180L each have an elastic strap portion near at least one end (near elbow body 140). The elasticity of this strap portion is used to reinforce the arm work support function, as described below.

As described in Example 1, the "arm work support function" of the work support suit with arm work support function 100a in Example 2 is such that, in the right arm work support belt 160R, an "abutment point T" is formed between the guide part 150 and the elbow body 140R of the right arm, where the work support is temporarily fixed, and similarly, in the left arm work support belt 160L, an "abutment point T" is formed between the guide part 150 and the elbow body 140L of the left arm, where the work support is temporarily fixed. In Example 2, further, in the second right arm work support belt 180R, a "second abutment point T2" is formed below the "abutment point" that is temporarily fixed between the second guide part 170 and the elbow body 140R of the right arm, and similarly, in the second left arm work support belt 180L, a "second abutment point T2" is formed below the "abutment point" that is temporarily fixed between the second guide part 170 and the elbow body 140L of the left arm. The second right arm work support belt 180R and the second left arm work support belt 180L, which are temporarily fixed at these "second contact points T2," are positioned under the shoulders and arms with elastic force, and as described in Example 1, the right arm work support belt 160R and the left arm work support belt 160L, which are temporarily fixed at the "contact points T," are positioned above the shoulders and arms with elastic force, so that the user's shoulders and arms are held by the right arm work support belt 160R and the left arm work support belt 160L, which have tension increased from above with elastic force, and at the same time, by the second right arm work support belt 180R and the second left arm work support belt 180L, which have tension increased from below with elastic force, making it easier to support the posture of the shoulders and arms.

FIG. 11 is a diagram for simply explaining the formation of this "second contact point T2."
As shown in FIG. 11(a), the "second contact point T2" is dynamically formed in response to the movement of the user's arm.
That is, in this "arm work supporting function", the "second contact portion T2" is not formed fixedly from the beginning, but is formed dynamically during the following movement.
A typical user movement is when the user changes the arm posture from the back side to the front side, and the elbow body 140 moves from a position behind the back body 110 to the front side. The second right arm work support belt 180R and the second left arm work support belt 180L follow the movement of the right elbow body 140R and the left elbow body 140L, respectively, but a contact point (second contact point T2) is formed at the point where the second right arm work support belt 180R contacts the edge of the back body 110, or at the point where the second right arm work support belt 180R contacts the user's shoulder blade. This second contact point T2 is generated according to the height of the user's arm movement. Similarly, the second contact point T2 is formed at the point where the second left arm work support belt 180L contacts the edge of the back body 110, or at the point where the second left arm work support belt 180L contacts the user's shoulder blade. The height at which the second contact point T2 occurs depends on the height of the user's arm movement.

As shown in Fig. 11(a) and Fig. 11(b), in the above movement, the user moves in the same manner as in Example 1, for example, by bringing the arm forward behind the user's back as in the "butterfly swimming", the second right arm work support belt 180R and the second left arm work support belt 180L also move forward following the movement of the user's elbow, but the second guide part 170 provided on the back body 110 is fixed near the center of the back, and on the way from the second guide part 170 to the right elbow body 140R and from the guide part 150 to the left elbow body 140L in the shortest distance, they come into contact with the edge of the back body 110 or the vicinity of the shoulder blade of the user's body, and the second right arm work support belt 180R and the second left arm work support belt 180L move forward following the movement of the elbow, so that the contact point becomes the second contact point T2 and is temporarily supported and fixed by frictional force.

Fig. 12 is a diagram simply showing how the "arm work support function" is exerted by extending the arm further forward as a result of the contact point T that is temporarily supported and fixed by the action shown in Fig. 11. As explained in Fig. 4 of the first embodiment, the right arm work support belt 160R and the left arm work support belt 160L with elasticity are placed along the upper sides of the user's shoulders and arms, and at the same time, the second right arm work support belt 180R and the second left arm work support belt 180L with elasticity are placed along the lower sides of the user's shoulders and arms, so that the user's shoulders and arms are simultaneously held from above and below by belts with increased tension and elasticity, making it easier to maintain a posture in which the arms are facing upward, reinforcing the "arm work support function".
Even in the state shown in Fig. 12, the same "arm work support function" as that shown in Fig. 4 of Example 1 can be obtained. Compared to the state shown in Fig. 4 of Example 1, the number of belts is increased, and a right arm work support belt 160R and a left arm work support belt 160L are provided along the upper side, while a second right arm work support belt 180R and a second left arm work support belt 180L are provided along the lower side, so that the first action shown in Fig. 5 of Example 1 and the second action shown in Fig. 6 of Example 1 are both enhanced.

Next, a method for easily eliminating the second contact point T2 formed when the user moves from an operation in which the arm is raised up to an operation in which the arm is lowered down will be described.
FIG. 13 is a diagram simply illustrating how the second contact point T2 can be eliminated by shifting to the task of lowering the arm when the "arm task support function" is reinforced.
This action is also similar to that shown in Figure 7 of Example 1, and as shown in Figure 13, when the user moves to the task of lowering the arm, the frictional force between the contact point T and the second contact point T2 decreases and they are released simply by shifting the arm slightly towards the back (i.e. backward), and not only the right arm work support belt 160R or the left arm work support belt 160L, but also the second right arm work support belt 180R and the second left arm work support belt 180L become free, the second contact point T2 disappears, and the arm becomes free and released.

As described above, according to the work support suit 100a with arm work support function shown in Example 2, the "arm work support function" creates a contact point T and a second contact point T2 that are temporarily supported and fixed, so that the right arm work support belt 160R, the left arm work support belt 160L, the second right arm work support belt 180R, and the second left arm work support belt 180L, which generate tension with elastic force, clamp the arms from above and below along the arms, making it easier to maintain the arm posture.
In other words, although the arms are not mechanically pulled upwards strongly, the arms are clamped to make it easier to maintain posture and to support the arm work. On the other hand, when moving to a task of lowering the arms, the user only needs to shift the arms slightly toward the back (i.e., backward), which releases the frictional force of the contact point T and the second contact point T2, and the right arm work support belt 160R, left arm work support belt 160L, second right arm work support belt 180R, and second left arm work support belt 180L no longer clamp the arms, leaving the arms free.

The work support suit 100b with arm work support function according to the third embodiment has the configurations of the first and second embodiments, and also provides support for the lower body in relation to the worker's working posture.
Here, the description of the back body 110a, the torso body 120, and the shoulder straps 130 that are the same as those in the first embodiment will be omitted as appropriate, and only the differences will be described.
14 and 15 are diagrams simply illustrating a configuration example of a work support suit 100b according to the third embodiment.
FIG. 14 is a diagram of the outer surface side as seen from the rear when worn by a worker, and FIG. 15 is a diagram of the inner surface side as seen from the side that contacts the back when worn by a worker.
As shown in Figures 14 and 15, the work support suit 100b with arm work support function of Example 3 is configured to include a back body 110, a torso body 120, a right shoulder strap body 130R, a left shoulder strap body 130L, an elbow body 140, a guide part 150, a right arm work support belt 160R, and a left arm work support belt 160L, as in Figures 1 and 2 shown in Example 1, and further includes a second guide part 160, a second right arm work support belt 180R, and a second left arm work support belt 180L, as in Figures 9 and 10 shown in Example 2, and further includes a lower leg body 190. Note that the lower leg body 190 is wrapped around the lower leg part of the lower body (around the knee, shin, calf, etc.) when worn and worn on the leg, but Figures 14 and 15 show it in an unfolded state before wearing.
Here, descriptions of the parts similar to those in Example 1 for the back body 110, torso body 120, right side shoulder strap body 130R, left side shoulder strap body 130L, elbow body 140, guide part 150, right arm work support belt 160R, and left arm work support belt 160L will be appropriately omitted, and descriptions of the parts similar to those in Example 2 for the second guide part 160, second right arm work support belt 180R, and second left arm work support belt 180L will be appropriately omitted, and other different parts will be described in detail.

The lower leg body 190 is configured to include a lower leg body main body portion 191 that is wrapped around the lower leg of the worker to fasten it, and a fastening strap body 192 that is fastened to the back body 110.
The main body portion 191 of the lower leg body is provided with a hook-and-loop fastener so that it can be wrapped around the lower leg of the worker and fastened.
In this example, there is a pair of left and right lower leg bodies 190L and 190R, which include a pair of left and right lower leg body main parts 191L and 191R, respectively, and a pair of left and right fastening strap straps 192L and 192R.
Here, at least a portion of the left fastening strap 192L and the right fastening strap 192R is formed of an elastic member.
In order to link the lower leg body 190 attached to the lower body with the back body 110 of the upper body, in this example, as shown in Figure 14, three connectors that serve as fastening points are provided on the back body 110 near the worker's waist, namely, right connector 116R, central connector 116C, and left connector 116L.

As shown in Figs. 14 and 15, the right fastening strap 192R is provided in a V-shape across the right connector 116R, the main body portion 191R of the right crus body, and the central connector 116C.
Additionally, a left fastening strap body 192L is provided in a V-shape that extends from the left connector 116L, the left lower leg body 191L, and the central connector 116C.
In the structure shown in Figures 14 and 15, the elastic members are hung in a so-called W shape, and the pair of left and right members share a common connection to the central connector 116C.
By providing a common connecting point even though the left and right parts are separated in this way, the balance between the left and right can be naturally adjusted just as if the left and right parts were crossed, even if there is a slight difference between the left and right sides of the worker.

The right side lower leg body 190R and the left side lower leg body 190L attached around the lower leg (around the shin and calf) of the lower body and the back body 110 attached to the upper body are fastened by an elastic right fastening strap body 192R and a left side fastening strap body 192L, so that when the user bends forward without bending the knees, a tensile force is generated that pulls the waist backward for support, making it easier to bend forward.
The work support suit of Example 3 makes it easy to correct the load balance associated with upper body movements during work, even in situations where work that requires a lot of bending of the upper body is mixed with work that requires standing.

In addition, the shape of the item as a design will be described for the work support suit with arm work support function according to the present invention.
Figure 16 is a diagram showing the shape (front, right side view, left side view, plan view, bottom view) of an article based on the work support suit 100 with arm work support function of Example 1, and Figure 17 is a diagram showing the shape (rear view) of an article based on the work support suit 100 with arm work support function of Example 1.
Also, Figure 18 is a diagram showing the shape (front, right side view, left side view, plan view, bottom view) of an article based on work support suit 100b with arm work support function of Example 3, and Figure 19 is a diagram showing the shape (rear view) of an article based on work support suit 100b with arm work support function of Example 3.
In addition, the design shape of an article based on the work support suit 100a with arm work support function of Example 2 can be that shown in Figures 18 and 19 excluding the lower leg body 190 and the right connector 116R, central connector 116C, and left connector 116L, which are connectors that link the lower leg body 190 and the back body 110 of the upper body, and is actually as shown in the figures.

The above illustrates and describes a preferred embodiment of the work support suit with arm work support function of the present invention, but it will be understood that various modifications are possible without departing from the technical scope of the present invention.

The work support suit with arm work support function of the present invention can be widely used as a wearable work support suit with arm work support function that can not only assist in work that requires bending and straightening the waist and back, such as various factory work, transporting and handling logistics materials, nursing care, and agricultural work, but also assist with arm work such as raising and lowering the arms.

100, 100a, 100b Work support suit 110 Back body 111 Elastic body 116L Left side connector 116R Right side connector 116C Central connector 120 Torso body 130L Left side shoulder strap body 130R Right side shoulder strap body 140L Left side elbow body 140R Right side elbow body 150 Guide part 160 Work support belt 160R Right arm work support belt 160L Left arm work support belt 170 Second guide part 180 Second arm work support belt 180R Second right arm work support belt 180L Second left arm work support belt 190 Lower leg body 191 Main body part of lower leg body 192 Fastening belt string body 193 Hook and loop fastener 193

Claims (11)

A back body to be attached to the back of the user;
a left shoulder strap and a right shoulder strap for carrying the back body on the back of the user;
A torso body provided forward from the back body and tightening the waist of the user;
An elbow body that tightens the elbow of the user;
One or more guide portions provided on the back body;
A right arm work support belt and a left arm work support belt are provided, one end of which is attached to the left shoulder strap body and the right shoulder strap body of either the left or right side, or to a part near the left or right shoulder of the back body, passing through the guide part, and the other end of which is attached to the elbow side part of the elbow body of the opposite arm of either the left or right side,
A work support suit with arm work support function, characterized in that the right arm work support belt and the left arm work support belt have a strap portion with elastic force generated in the longitudinal direction at least near the elbow body. The work support suit with arm work support function according to claim 1, characterized in that the suit has an arm work support function, in which the contact portions between the other ends of the right arm work support belt and the left arm work support belt, which contact the back body or the shoulder blades of the user depending on the height of the posture of the elbow body after passing through the guide section and before reaching the elbow side portion of the elbow body, are formed as temporary support points for the right arm work support belt and the left arm work support belt by frictional forces generated at the contact portions. The work support suit with arm work support function according to claim 2, characterized in that the contact portions in the arm work support function are formed at the points where the right arm work support belt and the left arm work support belt come into contact with the back body, or at the points where the right arm work support belt and the left arm work support belt come into contact with the user's shoulder blades, which arise according to the height of the posture of the elbow body when the user changes the posture of his/her arms from the back side to the front side and the elbow body moves forward from a position behind the back body. The work support suit with arm work support function described in claim 3 is characterized in that the right arm work support belt and the left arm work support belt are temporarily supported and fixed at the contact portion formed by the arm work support function according to the height of the posture of the elbow body with the upper arm raised up by the user, and when the user lowers either the left or right upper arm raised up to move the humerus downward, the length from the contact portion of the right arm work support belt or the left arm work support belt to the elbow body extends, generating an elastic force in the belt strap portion. The work support suit with arm work support function described in claim 4, characterized in that the right arm work support belt and the left arm work support belt cross each other on the left and right at or near the guide section of the back body, and the arrangement of the right arm work support belt or the left arm work support belt on the back body is symmetrical and balanced on the left and right. A work support suit with arm work support function according to any one of claims 1 to 5, characterized in that there are multiple sets of the right arm work support belt and the left arm work support belt. In addition to the one or more guide parts, a second guide part is provided below the guide part in a part of the back body,
A work support suit with arm work support function as described in any one of claims 1 to 6, characterized in that it is structured with a second right arm work support belt and a second left arm work support belt, one end of which is attached to a part of either the left or right elbow body, passing through the second guide part, and the other end of which is attached to a part of the back body or the torso body. The work support suit with arm work support function according to claim 7, characterized in that the second guide portion is disposed at a position where, when the user changes the arm posture from the back side to the front side and the elbow body moves forward from a position behind the back body, the right shoulder of the user is sandwiched between the right arm work support belt and the second right arm work support belt, and the left shoulder of the user is sandwiched between the left arm work support belt and the second left arm work support belt. the second right arm work support belt is attached at one end to the elbow body on the right arm side, and the other end is attached to a part of the right side of the torso body via the second guide part;
A work support suit with arm work support function as described in claim 7 or 8, characterized in that the second left arm work support belt has one end attached to the elbow body on the left arm side, and the other end attached to a portion of the left side of the torso body via the second guide part. A work support suit with arm work support function according to any one of claims 1 to 9, which has an elastic body installed inside the back body and supports the user's bending and straightening of the waist with the elastic force generated in the bending direction of the elastic body. A right lower leg body is wrapped around the right lower leg of the user to tighten it, and a left lower leg body is wrapped around the left lower leg to tighten it,
The right lower leg body is fastened to the back body by a right connector and a central connector provided near the waist of the user,
The left lower leg body is fastened to the back body by a left connector and a central connector provided near the waist of the user,
A right fastening strap body provided in a V-shape across the right connector, the right lower leg body , and the central connector;
A work support suit with arm work support function as described in any one of claims 1 to 10, characterized in that it is provided with a left side fastening strap body arranged in a V-shape across the left side connector, the left lower leg body , and the central connector.

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