JP6223834B2 - Walker - Google Patents

Description

  The present invention relates to a walker that assists walking of a person with weak legs.

  The so-called silver car market, which is mainly used by elderly people, has been strong. In addition, the market for walker, which is classified as a welfare mobile device, has increased approximately twice in the past few years. In general, there is a great need for a walker for safely moving outdoors. In recent years, the following has been proposed as a highly functional walker.

  In Patent Document 1, the front wheel has a structure that can be rotated back and forth around the rocker arm rotation axis, and when the walker approaches the step, the front wheel is pushed by the step to resist the spring force and move forward. A walker that is jumped to a rear position so that it can cross a step is described.

  In Patent Document 2, the left subframe provided with the left rear wheel and the right subframe provided with the right rear wheel are independently and electrically rotated with respect to the main frame provided with the left front wheel and the right front wheel. Therefore, when moving on a hill, when changing the posture of the walker by adjusting the posture change of the walker based on the gradient sensor, or when moving on a road surface inclined in the left-right direction, the left front wheel is changed to the left rear wheel. And the distance from the right front wheel to the right rear wheel are different from each other.

  In Patent Document 3, the angle formed between the support frame and the inter-wheel frame can be changed by a frame angle control actuator, and the processing unit controls the inclination angle of the support frame to be constant based on the inclination sensor, thereby providing a staircase or the like. A walker is described in which the user maintains a certain posture when walking.

JP-A-2005-118153 JP 2009-119014 A JP 2013-188304 A

However, the walker of Patent Document 1 is stable only when the front wheels are at the two positions of the front position and the rear position, and can only handle small steps.
Further, the walker of Patent Document 2 has concerns about delay in posture control, high cost, etc., because all posture control is based on control of an electric actuator based on a sensor.
Further, the walker of Patent Document 3 can cope with a case where there is no difference in height between the left wheel and the right wheel as in a staircase, but one of the left wheel and the right wheel rides on a convex part or enters a concave part. When leaning, a difference in height occurs between the left wheel and the right wheel, and the walker tilts left and right and becomes unstable.

  Therefore, the present invention can prevent the walker from tilting left and right even when one of the left wheel and the right wheel rides on the convex portion of the road surface or enters the concave portion, thereby assisting stable walking. An object is to provide a walker that can be used.

The walker of the present invention includes a base frame extending in the left-right direction, a support column fixed to the base frame and extending upward, a left wheel provided on the left side of the base frame, and a right wheel provided on the right side of the base frame. An inversion interlocking mechanism that inverts and interlocks the vertical movement of one of the left and right wheels caused by the unevenness of the road surface with the vertical movement of the other,
The left wheel is a left wheel train composed of a left rocker arm extending in the front-rear direction pivotally mounted on the left side of the base frame, and a plurality of wheels provided on the left rocker arm so as to be rotatable around the left and right axis. Yes,
The right wheel is a right wheel train composed of a right rocker arm extending in the front-rear direction pivotally mounted on the right side of the base frame, and a plurality of wheels provided on the right rocker arm so as to be rotatable around the left-right axis. characterized in that there.

Here, the support column is connected to two poles that are fixed to the left and right ends of the base frame and extend upward, a handle that extends rearward from the upper end of each pole, and a connecting bar that connects the intermediate portions in the height direction of both poles. The aspect which consists of can be illustrated.

The walker according to the present invention includes a base frame extending in the left-right direction, a support post fixed to the base frame and extending upward, a left wheel provided on the left side of the base frame, and a right provided on the right side of the base frame. A wheel and a reverse interlocking mechanism that reverses and interlocks the vertical movement of one of the left and right wheels caused by the unevenness of the road surface with the movement of the other vertical reverse direction,
The left wheel has a left first rocker arm extending in the front-rear direction in which an arm intermediate portion is pivotally mounted around the left and right axis by a base shaft on the left side of the base frame, and an arm intermediate portion at the front end of the left first rocker arm. A left second rocker arm extending in the front-rear direction that is pivotally mounted around the left-right axis by an inter-arm axis; a left front wheel rotatably provided around the left-right axis at the front end of the left second rocker arm; 2 A left center wheel provided at the rear end of the rocker arm so as to be rotatable around the left and right axis, and a left rear wheel provided at the rear end of the left first rocker arm so as to be rotatable around the left and right axis. Wheel train,
The right wheel has a right first rocker arm that extends in the front-rear direction and an arm intermediate portion that is mounted on the right side of the base frame so that the arm intermediate portion can be pivoted around the left and right axis by the base shaft. A right second rocker arm extending in the front-rear direction and pivotally mounted about the left and right axis by an inter-arm axis; a right front wheel rotatably provided around the left and right axis at the front end of the right second rocker arm; A right center wheel that is provided at the rear end of the two rocker arm so as to be rotatable around the left and right axis, and a right rear wheel that is provided at the rear end of the right first rocker arm so as to be rotatable around the left and right axis. characterized in that it is a wheel train.

  It is preferable that any one wheel in the left wheel train is a drive wheel driven by an electric motor, and any one wheel in the right wheel train is a drive wheel driven by an electric motor. This is because even if the pedestrian does not press the walker strongly, the walker can easily walk with the electric assist. In the aspect of the preceding paragraph, it is preferable that the left center wheel is a drive wheel driven by an electric motor, and the right center wheel is a drive wheel driven by an electric motor. This is because the phenomenon that the wheels are lifted by the drive wheels can be prevented.

  The reverse interlocking mechanism is preferably a mechanical type that does not use electricity. This is because there is no delay and the cost can be reduced as compared with the electric type. Examples of the mechanical type include a link type and a differential gear type.

  In particular, the reversal interlocking mechanism has a central portion in the left-right direction that is pivotally attached to a support shaft fixed to the base frame so as to be rotatable about a front-rear axis, a left end portion is connected to a left rocker arm, and a right end portion is a right rocker arm. It is preferable that it is a link type reverse interlocking mechanism using a balance link coupled to the. This is because the structure is the simplest, the weight can be reduced, and the cost can be the lowest.

  This link type reversal interlocking mechanism is a left link that connects the left end of the balance link to the left rocker arm so that the left and right distance between the left end of the balance link and the left wheel train can be increased when the balance link rotates. And a right connector for connecting the right end of the balance link to the right rocker arm so that the right and left distance between the right end of the balance link and the right wheel train increases when the balance link rotates. Is preferred. Examples of these couplers include couplers equipped with spherical bearings, ball slide couplers, and the like.

  Next, the support shaft can be fixed to the base frame via the support folding mechanism, and when the support support is not fixed to the base frame by the support folding mechanism, the support is tilted backward together with the base frame. It is preferably foldable.

  The support folding mechanism includes a support portion that includes the support shaft and is extrapolated to the base frame so as to be relatively rotatable, a fixing portion that is fixed so as not to rotate relative to the base frame, and a support portion. Examples include a switching device that connects and disconnects the fixed portion.

  An example of this switching device is an index plunger in which the plunger body is inserted into the fixed portion and the pin can enter the pin receiving hole of the support portion.

  Further, the walker preferably includes a foldable chair.

  Moreover, it is preferable that the walker has a detachable luggage basket.

  According to the walker of the present invention, even when one of the left wheel and the right wheel rides on the convex portion of the road surface or enters the concave portion, the walker can be prevented from tilting left and right, thereby assisting stable walking. The effect which can be done is acquired.

It is the perspective view which looked at the walker of Example 1 from the front side. It is the perspective view which looked at the walker of Example 1 from the back side. The walker of Example 1 was seen by omitting members beyond the support, (a) is a plan view, and (b) is a perspective view. When the walker of Example 1 exists on a flat road surface, (a) is a front view, (b) is a side view. (A) when the left front wheel of the walker of Example 1 rides on a convex part is a front view, (b) is a side view. It is a perspective view at the time of chair use of the walker of Example 1. FIG. It is a fragmentary perspective view which shows the effect | action of the support | pillar folding mechanism of the walker of Example 1. FIG. It is a perspective view at the time of the support | pillar folding of the walker of Example 1. FIG. It is a perspective view when the walker of Example 2 exists on a flat road surface. It is a perspective view when the right rear wheel of the walker of Example 2 gets on. (A) of the walker of Example 3 is a front view, (b) is a sectional side view.

The walker 1 includes a base frame 2 extending in the left-right direction, a support column 3 fixed to the base frame 2 and extending upward, a left wheel train 10 provided on the left side of the base frame 2, and a right side of the base frame 2. The right wheel train 20 and a reversal interlocking mechanism for reversing and interlocking the vertical movement of one of the left wheel and the right wheel caused by the unevenness of the road surface with the other vertical movement,
The left wheel train 10 includes a left first rocker arm 11 extending in the front-rear direction in which an arm intermediate portion is pivotally mounted around a left and right axis by a base shaft 13 on the left side of the base frame 2, and a front end of the left first rocker arm 11. The left middle rocker arm 12 is pivotally mounted about the left and right axis by the inter-arm shaft 14 and the left second rocker arm 12 extends in the front-rear direction. The front end of the left second rocker arm 12 is rotatable about the left and right axis. The left front wheel 15 provided, the left center wheel 17 provided at the rear end of the left second rocker arm 12 so as to be rotatable around the left and right axis, and the rear end of the left first rocker arm 11 can be rotated around the left and right axis. The left rear wheel 18 provided in the
The right wheel train 20 includes a right first rocker arm 21 extending in the front-rear direction in which an arm middle portion is pivotally attached to the right side of the base frame 2 by a base shaft 13 so as to be rotatable about a left-right axis, and a front end of the right first rocker arm 21 The middle part of the arm is pivoted around the left-right axis by the inter-arm shaft 14 and extends in the front-rear direction, and the front end of the right second rocker arm 22 is rotatable around the left-right axis. The right front wheel 25 provided, the right central wheel 27 provided rotatably at the rear end portion of the right second rocker arm 22 and rotatable around the left and right axis, and the rear end portion of the right first rocker arm 21 rotatable around the left and right axis. And the right rear wheel 28 provided in the
The left central wheel 17 is a driving wheel driven by the left electric motor 16, and the right central wheel 27 is a driving wheel driven by the right electric motor 26.
The reversal interlocking mechanism 30 is pivotally attached to the support shaft 31 fixed to the base frame 2 at the center in the left-right direction so as to be rotatable about the front-rear axis, the left end is connected to the left rocker arm, and the right end is right This is a link type reversal interlocking mechanism using a balance link 32 connected to a rocker arm.

  The walker 1 of the first embodiment shown in FIGS. 1 to 8 includes a base frame 2 extending in the left-right direction, a support column 3 fixed to the base frame 2 and extending upward, and a left wheel provided on the left side of the base frame 2. The vertical movement of one of the left wheel train 10 or the right wheel train 20 caused by the unevenness of the road surface and the right wheel train 20 provided on the right side of the row 10 and the base frame 2 is reversed to the other upside down motion. A reversal interlocking mechanism 30 to be interlocked with each other, a left electric motor 16 that rotationally drives driving wheels in the left wheel train 10, a right electric motor 26 that rotationally drives driving wheels in the right wheel train 20, and a battery that is a motor power source. And a motor control unit. In addition, the walker according to the embodiment includes a column folding mechanism 35 that allows the column 3 to be tilted backward and folded. Furthermore, the walker according to the first embodiment includes a foldable chair 45 and a detachable luggage basket 48.

1. Base frame 2 and support 3
The base frame 2 has a shaft shape in the illustrated example, but is not limited thereto, and may be a plate shape, an angle shape, or the like. In the illustrated example, the support column 3 includes two poles 4 that are fixed to the left and right ends of the base frame 2 and extend upward, a handle 5 that extends rearward from the upper end of each pole 4, and an intermediate height between both poles 4. It consists of a connecting bar 6 that connects the parts. The connecting bar 6 also functions as a backrest for a chair 45 described later, and is provided with a cushion material 7. The column 3 is not limited to this. For example, one pole 4 fixed to the center of the base frame 2 in the left-right direction and extending upward, a bar extending left and right from the upper end of the pole 4, and left and right ends of the bar It may consist of a handle 5 extending rearward from the part.

2. Wheel train 10, 20
The left wheel train 10 includes a left first rocker arm 11 extending in the front-rear direction in which an arm intermediate portion is pivotally mounted around a left and right axis by a base shaft 13 on the left side of the base frame 2, and a front end of the left first rocker arm 11. The left middle rocker arm 12 is pivotally mounted around the left and right axis by the inter-arm shaft 14 and extends in the front-rear direction. The front end of the left second rocker arm 12 has a bracket around the left and right axis. A left front wheel 15 rotatably mounted on the left side, a left central wheel 17 attached to a rear end portion of the left second rocker arm 12 via a left electric motor 16 that rotates about a left-right axis, and a left first rocker arm 11. The left rear wheel 18 is rotatably mounted around the left and right axis through a bracket at the rear end. Therefore, the left front wheel 15 and the left rear wheel 18 are free casters, the left center wheel 17 is a drive wheel, and the left wheel train 10 is prevented from being lifted by the drive wheel. The left wheel train 10 is not limited to this, and for example, the left front wheel 15 and the left center wheel 17 can be free casters, and the left rear wheel 18 can be drive wheels.

  The right wheel train 20 includes a right first rocker arm 21 extending in the front-rear direction in which an arm intermediate portion is pivotally attached to the right side of the base frame 2 by a base shaft 23 so as to be rotatable about a left-right axis, and a front end of the right first rocker arm 21 The right second rocker arm 22 extending in the front-rear direction is attached to the middle portion of the arm so as to be pivotable about the left-right axis by the arm shaft 24, and the front end of the right second rocker arm 22 is rotated about the left-right axis via the bracket. A right front wheel 25 rotatably mounted on the right side, a right central wheel 27 attached to a rear end portion of the right second rocker arm 22 via a right electric motor 26 rotating about a left-right axis, and a right first rocker arm 21 The right rear wheel 28 is rotatably mounted around the left and right axis lines via a bracket at the rear end portion. Accordingly, the right front wheel 25 and the right rear wheel 28 are free casters, the right center wheel 27 is a drive wheel, and the right wheel train 20 is prevented from being lifted by the drive wheel. The right wheel train 20 is not limited to this. For example, the right front wheel 25 and the right center wheel 27 can be free casters, and the right rear wheel 28 can be drive wheels.

3. Reverse interlock mechanism 30
The reversal interlocking mechanism 30 is a link type reversal interlocking mechanism, and is disposed in front of the base frame 2 with a support shaft 31 protruding forward from a central portion in the left-right direction of the base frame 2 via a support folding mechanism 35. The balance link 32 that extends in the direction and is pivotally attached to the front end portion of the support shaft 31 so as to be rotatable about the front-rear axis, and the left end portion of the balance link 32 is the left first rocker arm 11 or the left second rocker arm. 12 is connected to a position in front of the base shaft 13 in the right and the right end of the balance link 32 is connected to a position in front of the base shaft 23 in the right first rocker arm 21 or the right second rocker arm 22. It is comprised from the connection tool 34. FIG. The left connecting tool 33 and the right connecting tool 34 in the illustrated example connect the left end portion and the right end portion of the balance link 32 to the left second rocker arm 12 and the right second rocker arm 22 at the positions of the inter-arm shafts 14 and 24, respectively. Yes.

  With this configuration, the reverse interlocking mechanism 30 reverses the vertical movement of one of the left wheel train 10 or the right wheel train 20 to the other reverse vertical motion, and the base frame 2 does not tilt left and right. Acts to stay level.

  As will be described in detail later, for example, when the left wheel train 10 rides on the convex portion P of the road surface, the left first rocker arm 11 or the left second rocker arm 12 positioned in front of the base shaft 13 swings, and the base Although the left side of the frame 2 is raised, the balance link 32 is rotated by a small angle around the support shaft 31 by the left connector 33 raised together with the left second rocker arm 12, so that it is more than the base shaft 23 of the right wheel train 20. The right first rocker arm 21 or the right second rocker arm 22 located at the front is lowered, and the right side of the base frame 2 is raised relative to this, so that the base frame 2 remains horizontal without tilting left and right.

  Further, when the left wheel train 10 enters a recess in the road surface, the left first rocker arm 11 or the left second rocker arm 12 positioned forward of the base shaft 13 is lowered, and the left side of the base frame 2 is lowered. The left link 33 that has been lowered together with the left second rocker arm 12 causes the balance link 32 to rotate around the support shaft 31 by a small angle so that the right first rocker arm is located in front of the base shaft 23 of the right wheel train 20. 21 or the right second rocker arm 22 is raised, and the right side of the base frame 2 is raised relative to this, so that the base frame 2 remains horizontal without tilting left and right.

  As described above, when the balance link 32 rotates by a small angle around the support shaft 31 from the horizontal state, the left-right distance between the left end of the balance link 32 and the left wheel train 10 increases, and the right end of the balance link 32 and the right The left-right distance from the wheel train 20 is increased. Therefore, a left connector 33 for connecting the left end portion of the balance link 32 to the left rocker arms 21 and 22 and a balance link so that the left-right distance between the left end portion of the balance link 32 and the left wheel train 10 can be increased. A right connector 34 for connecting the right end portion of the balance link 32 to the right rocker arms 21 and 22 is provided so as to cope with an increase in the left-right distance between the right end portion 32 and the right wheel train 20. The coupling tools 33 and 34 in the illustrated example are provided with spherical bearings at the upper part connected to the balance link 32 and the lower part connected to the rocker arm (for example, trade name “Link Ball” of THK). As the connecting tools 33 and 34 are inclined, the connection is maintained corresponding to the increase in the left-right distance. In addition, a connection tool is not limited to the thing provided with the spherical bearing, What kind of thing may be sufficient if it can respond to the said left-right distance increasing.

4). Prop folding mechanism 35
The column folding mechanism 35 includes the support shaft 31 and is externally attached to the base frame 2 so as to be relatively rotatable, and a fixing portion 37 fixed to the base frame 2 so as not to be relatively rotated. The plunger main body 38a is inserted into the fixed portion 37, and the pin 38b includes an index plunger 38 that can enter the pin 38b receiving hole 36a of the support portion 36.

The operation of the support folding mechanism 35 is shown in FIG.
As shown in FIG. 7A, when the index plunger 38 is pushed to cause the pin 38 b to enter the pin 38 b receiving hole 36 a of the support portion 36, the support portion 36 and the fixing portion 37 are connected. As a result, the base frame 2 does not rotate relative to the support portion 36, so that the column 3 extending from the base frame 2 is maintained in an upright state.
7B, when the index plunger 38 is pulled and the pin 38b is retracted from the pin 38b receiving hole 36a of the support portion 36, the support portion 36 and the fixing portion 37 are separated. As a result, the base frame 2 can be rotated relative to the support portion 36. Therefore, as shown in FIGS. 7C and 8, the support column 3 extending from the base frame 2 can be rotated backward to be lowered. Can be folded.

5. Motor power supply, motor controller, and brake The control box 40 can be rotated around the left and right axis so that the control box 40 can be changed between a standing state alongside the supporting column 3 and a substantially horizontal state by tilting backward. Is attached. The control box 40 houses a battery (not shown) that is a motor power source for the left electric motor 16 and the right electric motor 26 and a motor control unit (not shown). The handle 5 is provided with a brake lever 8, and the brake lever 8 is provided with an electrical sensor (not shown) such as a switch, a potentiometer, and a rotary encoder. The control box 40 and each electric motor and electrical sensor are connected by wiring passing through the inside of the support column 3 and each rocker arm.

6). Chair 45
On the front side of the control box 40 in the standing state, a chair 45 (seat portion) is attached in parallel (the chair 45 is in a folded state at this time). Therefore, in the horizontal state of the control box 40, the chair 45 is in a substantially horizontal state (use state) above the control box 40 and functions as a seat. At this time, the connecting bar 6 and the cushion material 7 of the support column 3 function as a backrest of the chair 45. The illustrated chair 45 is a pipe frame 46 with a seat surface sheet 47 stretched. By making the seat surface sheet 47 a mesh or canvas that is easy to dry, or by making it water-repellent, reuse after rain can be accelerated.

7). Luggage basket 48
A luggage car 48 is detachably attached to the connecting bar 6 of the column 3. The luggage car 48 is located further in front of the control box 40 and the chair 45.

Next, a method of using the walker 1 according to the first embodiment configured as described above and its function and effect will be described.
(1) Basic operation When the user grasps the left and right handles 5 and lightly pushes the walker 1 forward, a sensor (not shown) detects this, and the control unit is electrically driven at a speed corresponding to the pushing force. The motors 16 and 26 are rotated. When the force pushing the left handle 5 and the force pushing the right handle 5 are less than a predetermined difference, the left and right electric motors 16 and 26 rotate at a constant speed, and the walker 1 goes straight. When the force pushing the left handle 5 is greater than a predetermined difference than the force pushing the right handle 5, the left electric motor 16 rotates at a higher speed, and the walker 1 turns to the right. If this difference is reversed left and right, the walker turns left and proceeds. The pedestrian can easily walk at a desired speed while being assisted by the walker 1 that travels electrically. In particular, a pedestrian can easily walk even when a heavy load is in the luggage basket 48 or when climbing uphill.

  When the user stops pushing the walker 1 forward, the electric motors 16 and 26 are stopped and the walker 1 is stopped. Further, when the brake lever 8 is operated, the electric motors 16 and 26 are stopped and the walker 1 is stopped.

(2) Walking on uneven and stepped road surface As shown in the change from FIG. 4 to FIG. 5, for example, when the left front wheel 15 rides on the convex portion P of the road surface, the left second rocker arm 12 is the axis of the left central wheel 17. The left first rocker arm 11 swings so that the front side ascends about the axis of the left rear wheel 18 and the left side of the base frame 2 moves accordingly. To rise. At this time, the balance link 32 is rotated by a small angle around the support shaft 31 by the left coupling tool 33 raised together with the second left rocker arm 12, and the second rocker arm of the right wheel train 20 is moved via the right coupling tool 34. Since the right end of the base frame 2 is raised relative to this, the base frame 2 remains horizontal without tilting left and right. As a result, the column 3 does not tilt left and right, so that a pedestrian holding the handle 5 can continue to walk stably without wobbling left and right.

  Moreover, the support column 3 does not tilt so much back and forth, and its tilt is smaller than the tilt of the wheel train. First, since the base frame 2 is rotatable with respect to the left second rocker arm 12, even if the left second rocker arm 12 swings, the base frame 2 does not tilt back and forth. 2, since the base frame 2 is connected to the balance link 32, the free rotation is restricted, and the base frame 2 tilts back and forth by the difference between the rising amount of the left side of the base frame 2 and the rising amount of the left connector 33. Because it is only to do. In FIG. 5, the line connecting the left front wheel 15 and the left rear wheel 18 between the left front wheel 15 and the column 3 in FIG. 4 is indicated by a two-dot chain line. In contrast, the column 3 is tilted only about 2.5 degrees (about 1/2 with respect to the change of the wheel) in the change from FIG. 4 to FIG. 5. Thereby, the pedestrian who grasped the handle 5 can continue a stable walk without worrying about the support column 3 falling down and without wobbling back and forth.

  Although not shown, when the left wheel train 10 enters a recess in the road surface, the left second rocker arm 12 swings so that the front side descends about the axis of the left central wheel 17, 1 The rocker arm 11 swings so that the front side descends about the axis of the left rear wheel 18, and the left side of the base frame 2 descends accordingly. At this time, the balance link 32 is rotated by a small angle around the support shaft 31 by the left connector 33 lowered together with the second left rocker arm 12, and the second rocker arm of the right wheel train 20 is raised via the right connector 34. Since the right side of the base frame 2 descends relative to this, the base frame 2 is kept horizontal without tilting left and right. Also in this case, the support column 3 does not tilt much forward, and its tilt is smaller than the tilt of the wheel train.

  Although not shown, for example, when walking on a step with no difference between right and left, such as when going up and down stairs, the left wheel train 10 and the right wheel train 20 move in the same way, so the balance link 32 is not rotated. Does not move. However, also in this case, the support column 3 does not tilt so much forward and backward, and there is an effect that the tilt is smaller than the tilt of the wheel train.

(3) Use of Chair 45 When the user wants to rest temporarily during walking, as shown in FIG. 6, the chair 45 (seat part) is tilted backward together with the control box 40 to be in a horizontal state. You can sit down and rest. At this time, the connecting bar 6 and the cushion material 7 of the support column 3 function as a backrest.

(4) Folding of the pillar 3 When the walker 1 is stored or loaded on the automobile, the support part 36 and the fixing part 37 are pulled by pulling the index plunger 38 of the pillar folding mechanism 35 as shown in FIG. 8 and turning the column 3 extending from the base frame 2 backward as shown in FIG. 8 can be folded into a compact state. Especially, the height dimension is remarkably reduced. It becomes easy.

  The walker 1 of the second embodiment shown in FIGS. 9 and 10 is different from the first embodiment in the left connector 33, the right connector 34, and the strut folding mechanism 35. In contrast to the state of FIG. 9, FIG. 10 shows a state in which the right rear wheel 28 is raised.

  The couplers 33 and 34 are ball slide couplers, a coupling member a coupled to and separated from the first rocker arms 11 and 21 by a lock member 39, and a U-shaped member b provided on the coupling member a. The ball member c is provided at the left end portion and the right end portion of the balance link 32 and is slidably fitted to the U-shaped member b. The sliding of the ball member c corresponds to the increase in the left-right distance between the balance link 32 and the wheel train when the balance link 32 rotates at a small angle as described above.

  The support folding mechanism 35 includes a connecting member a and a lock member 39. When the connecting member a is connected to the first rocker arms 11 and 21 by tilting the lock member 39, the support 3 is maintained in an upright state. When the coupling member a is separated from the first rocker arms 11 and 21, the support column 3 can be rotated rearward to be in a folded state.

  The walker 1 of the third embodiment shown in FIG. 11 is different from the first embodiment in the inversion interlocking mechanism 30 and the strut folding mechanism 35.

  The reverse interlocking mechanism 30 is a differential gear type reverse interlocking mechanism, and includes a differential gear 41 built in the center of the base frame 2, and a left transmission shaft 42 that transmits the tilt of the left first rocker arm 11 to the differential gear 41. And a left transmission shaft 43 that transmits the tilt of the right first rocker arm 21 to the differential gear 41. This differential gear type reverse interlocking mechanism interlocks the tilting of the left first rocker arm 11 and the tilting of the right first rocker arm 21 in opposite directions, thereby causing the vertical movement of one of the left wheel or the right wheel to the other. It is designed to be reversed and interlocked with the movement of the upside down direction.

  The support folding mechanism 35 includes a bracket 51 provided on the base frame 2 and a lock member 52 that connects and disconnects the pole 4 of the support 3 from the bracket 51. When the pole 4 is coupled to the bracket 51, the support column 3 is maintained in an upright state. When the pole 4 is detached from the bracket 51, the support column 3 can be rotated backward to be folded.

  In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of invention, it can change suitably and can be actualized.

DESCRIPTION OF SYMBOLS 1 Walker 2 Base frame 3 Support | pillar 5 Handle 10 Left wheel row 11 Left first rocker arm 12 Left second rocker arm 15 Left front wheel 16 Left electric motor 17 Left center wheel 18 Left rear wheel 20 Right wheel row 21 Right first rocker arm 22 Right Second rocker arm 25 Right front wheel 26 Right electric motor 27 Right center wheel 28 Right rear wheel 30 Reversing interlock mechanism 31 Support shaft 32 Balance link 33 Left coupling tool 34 Right coupling tool 35 Strut folding mechanism 36 Supporting part 37 Fixing part 38 Index Plunger 45 Chair 48 Luggage basket P Convex

Claims (13)

A base frame (2) extending in the left-right direction, a support post (3) fixed to the base frame and extending upward, a left wheel (10) provided on the left side of the base frame, and a right provided on the right side of the base frame A wheel (20), and a reversal interlocking mechanism (30) for reversing and interlocking the vertical movement of one of the left wheel and the right wheel caused by the unevenness of the road surface with the other vertical movement,
The left wheel has a left rocker arm (11, 12) extending in the front-rear direction pivotally mounted on the left side of the base frame, and a plurality of wheels (15, 17) provided on the left rocker arm so as to be rotatable about the left and right axis. , 18) and the left wheel train (10),
The right wheel includes a right rocker arm (21, 22) extending in the front-rear direction pivotally attached to the right side of the base frame, and a plurality of wheels (25, 27) provided on the right rocker arm so as to be rotatable about a left-right axis. , 28), and a walker which is a right wheel train (20) . The column (3) includes two poles (4) that are fixed to the left and right ends of the base frame (2) and extend upward, a handle (5) that extends rearward from the upper end of each pole, and heights of both poles. The walker according to claim 1, comprising a connecting bar (6) for connecting the middle portion in the vertical direction . A base frame (2) extending in the left-right direction, a support post (3) fixed to the base frame and extending upward, a left wheel (10) provided on the left side of the base frame, and a right provided on the right side of the base frame A wheel (20), and a reversal interlocking mechanism (30) for reversing and interlocking the vertical movement of one of the left wheel and the right wheel caused by the unevenness of the road surface with the other vertical movement,
The left wheel has a left first rocker arm (11) extending in the front-rear direction in which an arm middle portion is pivotally attached to the left side of the base frame by a base shaft so as to be rotatable around a left-right axis, and an arm at a front end portion of the left first rocker arm A left second rocker arm (12) extending in the front-rear direction and having an intermediate portion pivotally mounted around the left and right axis by an inter-arm axis, and provided at the front end of the left second rocker arm so as to be rotatable about the left and right axis. Left front wheel (15), left central wheel (17) provided at the rear end of the left second rocker arm to be rotatable about the left and right axis, and rear end of the left first rocker arm to be rotatable about the left and right axis A left wheel train (10) composed of a left rear wheel (18) provided,
The right wheel has a right first rocker arm (21) extending in the front-rear direction in which an arm intermediate portion is pivotally mounted on the right side of the base frame so as to be rotatable about a left-right axis by a base shaft, and an arm at the front end of the right first rocker arm A right second rocker arm (22) extending in the front-rear direction and having an intermediate portion pivotally mounted around an axis between arms by a shaft between the arms, and a front end portion of the right second rocker arm provided to be rotatable around the left and right axes. The right front wheel (25), the right central wheel (27) provided at the rear end of the right second rocker arm so as to be rotatable around the left and right axis, and the rear end of the right first rocker arm can be rotated around the left and right axis. provided the right rear wheel (28) is configured from the the right wheel column (20) der Ru walker. Any one wheel in the left wheel train (10) is a drive wheel driven by the electric motor (16), and any one wheel in the right wheel train (20) is driven by the electric motor (26). The walker according to claim 1 or 2, wherein the walker is a ring.   The walker according to claim 3, wherein the left central wheel (17) is a driving wheel driven by an electric motor (16), and the right central wheel (27) is a driving wheel driven by an electric motor (26).   The walker according to any one of claims 1 to 5, wherein the reverse interlocking mechanism (30) is a mechanical type that does not use electricity. The reversal interlocking mechanism (30) has a central portion in the left-right direction that is pivotally attached to a support shaft (31) fixed to the base frame so as to be rotatable about a front-rear axis, a left end portion connected to a left rocker arm, and a right end The walker according to claim 1, 2 or 3, wherein the walker is a link type reversal interlocking mechanism using a balance link (32) connected to a right rocker arm.   The link-type reversal interlocking mechanism (30) connects the left end of the balance link to the left rocker arm so that the left-right distance between the left end of the balance link and the left wheel train can be increased when the balance link rotates. A right link that connects the right end of the balance link to the right rocker arm so that the left and right connector (33) and the right and left distance between the right end of the balance link and the right wheel train can be increased when the balance link rotates. A walker according to claim 7, comprising a tool (34).   The support shaft (31) can be fixed to the base frame via the support folding mechanism (35). When the support support is not fixed to the base frame by the support folding mechanism, the support is rearward together with the base frame. The walker according to claim 7 or 8, wherein the walker can be folded down.   The support folding mechanism (35) includes the support shaft (31) and is externally attached to the base frame so as to be rotatable relative to the support frame (36), and is fixed so as not to rotate relative to the base frame. The walker according to claim 9, comprising a fixed part (37) and a switching device (38) for connecting and separating the support part and the fixed part.   The walker according to claim 10, wherein the switching device (38) is an index plunger in which the plunger body (38a) is inserted into the fixed portion and the pin (38b) can enter the pin receiving hole (36a) of the support portion.   The walker according to any one of claims 1 to 11, further comprising a foldable chair (45).   The walker according to any one of claims 1 to 12, further comprising a detachable luggage basket (48).

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