JP2000142636A - Bag-making-packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag-making-packaging machine capable of efficiently making compatible the control for moving a heater between a welding position and a retracting position in a satisfactory response to each other and a delicate control of the pressing force of the heater in the welding position. SOLUTION: A first regulator and second regulator for the production of high-pressure air and low-pressure air, respectively, are connected to a cylinder 71. The first air supply chamber 71c and second air supply chamber 71d of the cylinder 71 are provided with a passage A and passage B, respectively, for the supply of the high-pressure air, and the second air supply chamber 71d is provided with a passage for the supply of the low-pressure air. By the actuation of the first and second switching valves, a heater unit 50 and a support unit 60 are moved to a welding position, the pressing force of a heater belt 53 in the welding position is adjusted, and the heater unit 50 and support unit 60 are moved to the retracting position. Also, when the low-pressure air is supplied to the second air supply chamber 71d, the high-pressure air is added to the passage for the supply of the low-pressure air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making and packaging machine for enclosing articles in a packaging bag while forming a strip film into the packaging bag, and belongs to the field of packaging technology.

[0002]

2. Description of the Related Art Generally, a bag making and packaging machine for enclosing an article in a packaging bag while forming the packaging bag is formed by bending a band-shaped packaging material into a cylindrical shape around a chute for charging an article. The left and right side edges are overlapped, the overlapped portion is thermally welded by a vertical sealing device, and the tubular packaging material is thermally welded in the width direction by a horizontal sealing device to enclose the article in the packaging material. It is configured.

[0003] Among them, the heat sealing by the vertical sealing device intermittently causes a heated heater block to intermittently come into contact with and separate from a chute, for example, so that the left and right side edges of the packaging material are separated from the block and the front of the chute. It is sandwiched and pressed (intermittent conveyance), or it runs while being wound around a pair of pulleys, and a heated metal heater belt is continuously brought into contact with a chute. This is performed by sandwiching both side edges between the block and the front surface of the chute and pressing (continuous conveyance).

In this case, the heater block in the intermittent transport system or the heater belt in the continuous transport system (hereinafter, these are simply referred to as "heaters").
In any case, the heater is moved between a welding position where the heater contacts the chute and welds the packaging material, and a retreat position where the heater separates from the chute. That is, in the case of the intermittent transport method, while the packaging material is transported,
The heater moves to the retracted position, while in the case of the continuous conveyance method, for example, when the conveyance of the packaging material is temporarily stopped due to a work trouble to avoid overheating of the packaging material. The heater moves to the retracted position.

On the other hand, when the heater is at the welding position, the heater presses the packaging material against the chute at a desired pressure in order to fuse the packaging material. The adjustment is performed using an urging force, and the adjustment of the pressing force is performed manually.

[0006]

By the way, the above-mentioned chute may be slightly changed in its mounting position depending on, for example, how it is mounted on the main body of the packaging machine, or may be deformed due to pressing of the heater or long-term use. In this case, the welding position of the heater changes, and consequently the pressing force of the heater changes, and the elastic force of the spring must be adjusted each time the welding position changes.

In addition, manual adjustment of the elastic force of the spring lacks accuracy, and in recent years, the pressing force of the heater has been limited to the characteristics relating to the thickness and material of the film and, for example, the wrap seal and fin seal. It is desired to be able to cope with the film sealing method or the operating capacity and operating conditions of the bag making and packaging machine, and it is necessary to set the above pressing force finely according to those factors.

On the other hand, as described above, apart from such a fine adjustment of the pressing force of the heater, it is necessary to move the heater between the welding position and the retreat position. In this movement, responsiveness is emphasized, and it is desired that the heater moves between the two positions as quickly as possible.
Therefore, a relatively large driving force is required as a driving force for the movement, and in this respect, control different from the above-mentioned fine adjustment of the pressing force of the heater is required. Then, there is a problem how to apply these mutually different control forces to a single heater together.

Therefore, the present invention makes it possible to efficiently control both the control for moving the heater between the welding position and the retreat position with good responsiveness and the delicate control of the pressing force of the heater at the welding position. It is an object to provide a bag making and packaging machine.

[0010]

That is, the present invention is characterized by having the following configuration to solve the above-mentioned problems.

First, the invention according to claim 1 (hereinafter, referred to as a "first invention") relates to a method in which the overlapping portions of the left and right side edges of the packaging material bent around the chute member are attached to the chute member. In a bag making and packaging machine that is welded by being pressed against a chute member with a heater member that can be brought into contact with and separated from the chute member, the movement of the heater member between a welding position where the heater member contacts the overlapping portion and a retracted position where the heater member does not contact the overlapping portion An air cylinder for adjusting the pressing force of the heater member at the welding position, wherein the air pressure supplied to the air cylinder is a high air pressure for moving the heater member or a low air pressure for adjusting the pressing force. Air pressure generating means for generating air pressure supplied from one supply source as an original pressure, and the heater member moving air pressure generated by the generating means, the heater member is moved to the above-described position. The air pressure is supplied to the air cylinder when moved between the air cylinders, and the air pressure for adjusting the pressing force generated by the generating means is adjusted so that the air pressure is supplied to the air cylinder when adjusting the pressing force of the heater member. Switching means for switching the supply to the air cylinder is provided.

According to a second aspect of the invention (hereinafter referred to as a "second invention"), the switching means is switched by the switching means so that the air pressure for adjusting the pressing force is supplied to the air cylinder. In this case, there is provided a control means for adding the air pressure for moving the heater member to the air pressure for adjusting the pressing force for a predetermined time.

[0013] Next, the invention according to claim 3 (hereinafter referred to as "third invention") relates to a method in which the overlapping portions of the left and right side edges of the packaging material bent around the chute member are attached to the chute member. In a bag making and packaging machine that is welded by being pressed against a chute member by a heater member that can come in contact with and separate from the heater member, movement of the heater member between a welding position where the heater member contacts the overlapping portion and a retracted position where the heater member does not contact the overlapping portion And an air cylinder for adjusting the pressing force of the heater member at the welding position, and high air pressure for moving the heater member is supplied from a single supply source as air pressure supplied to the air cylinder. First air pressure generating means for generating air pressure as a source pressure, and second air pressure generating means for generating a low pressure air pressure for adjusting a pressing force using the air pressure supplied from the supply source as a source pressure. The step and the heater member moving air pressure generated by the first air pressure generating means are supplied to the air cylinder when the heater member is moved between the two positions, and are generated by the second air pressure generating means. Switching means for switching the supply of these air pressures to the air cylinder so that the air pressure for adjusting the pressing force is supplied to the air cylinder when adjusting the pressing force of the heater member. I do.

According to a fourth aspect of the invention (hereinafter referred to as a "fourth invention"), the switching means is switched by the switching means so that the pressing force adjusting air pressure is supplied to the air cylinder. In this case, control means is provided for controlling the first air pressure generating means to add the heater member moving air pressure to the pressing force adjusting air pressure for a predetermined time.

The invention according to claim 5 (hereinafter referred to as "the invention")
This is referred to as a "fifth invention." ) Is a bag making and packaging machine for welding by pressing an overlapping portion of the left and right side edges of the packaging material bent around the chute member against the chute member with a heater member capable of coming into contact with and separating from the chute member. The movement of the heater member to a welding position where the heater member comes into contact with the overlapping portion, the movement of the heater member to a retracted position where the heater member does not come into contact, and the adjustment of the pressing force of the heater member at the welding position. An air cylinder is provided, and the air cylinder is provided with a first air chamber to which air pressure is supplied when the heater member is moved to the retreat position, and when the heater member is moved to the welding position,
Alternatively, a second air chamber to which air pressure is supplied when adjusting the pressing force of the heater member is provided, and a single high pressure air pressure for moving the heater member is supplied as the air pressure to be supplied to the air cylinder. First air pressure generating means for generating the air pressure supplied from the source as the original pressure, and second air pressure generating means for generating the low pressure air pressure for adjusting the pressing force using the air pressure supplied from the supply source as the original pressure. , The first
The air pressure for heater member movement generated by the air pressure generating means is supplied to the first air chamber when the heater member is moved to the retracted position, and the air pressure for heater member movement generated by the first air pressure generating means is supplied to the first air chamber. Air pressure is supplied to the second air chamber when the heater member is moved to the welding position, and the pressing force adjusting air pressure generated by the second air pressure generating means adjusts the pressing force of the heater member. Switching means for switching the supply of these air pressures to the air cylinder so as to be sometimes supplied to the second air chamber is provided.

According to a sixth aspect of the present invention (hereinafter referred to as a "sixth aspect"), in the fifth aspect, the switching means supplies the pressing force adjusting air pressure to the second air chamber. A control means for controlling the first air pressure generating means to add the heater member moving air pressure to the pressing force adjusting air pressure in the second air chamber for a predetermined time when the pressure is switched to It is characterized by.

Next, according to a seventh aspect of the present invention (hereinafter referred to as a "seventh aspect"), in any of the first to sixth aspects, the switching means supplies the air pressure for adjusting the pressing force. An adjusting means for variably controlling the pressing force adjusting air pressure when the pressure is switched as described above is provided.

According to the first to seventh aspects, the following operation can be obtained.

First, according to the bag making and packaging machine of the first invention, the movement of the heater member between a welding position where the heater member contacts the overlapping portion and a retracted position where the heater member does not contact the overlapping portion, and the heater member at the welding position. An air cylinder for adjusting the pressing force is provided from a single supply source as the high air pressure for moving the heater member or the low air pressure for adjusting the pressing force as the air pressure supplied to the air cylinder. Air pressure generating means for generating air pressure as an original pressure, and the heater member moving air pressure generated by the generating means is supplied to the air cylinder when the heater member is moved between the two positions, and is generated by the generating means. The air pressure for adjusting the pressing force is supplied to the air cylinder so that the air pressure is supplied to the air cylinder when adjusting the pressing force of the heater member. Since the switching means is provided so that the air pressure for moving the heater member is supplied to the air cylinder, the heater member can be moved between the welding position and the retracted position. By switching the pressing force adjusting air pressure to be supplied to the air cylinder by the switching means, the pressing force of the heater member at the welding position can be adjusted. As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, etc. Even if the welding position of the heater member changes due to deformation or the like caused by use, it is possible to press the heater member with a pressing force that is always set according to the change,
In addition, the air cylinder can finely control the pressing force of the heater member at the welding position, and therefore,
The control of moving the heater member between the welding position and the retreat position and the control of the pressing force of the heater member can be performed while efficiently achieving both.

According to the bag making and packaging machine of the second invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the air cylinder, the air pressure for moving the heater member for a predetermined time. Is provided to the pressing force adjusting air pressure, so that when the supply of the heater member moving air pressure is switched to the pressing force adjusting air pressure, the pressing force adjusting air pressure is increased for a predetermined time. The air pressure for moving the heater member is added, and it is possible to suppress a decrease in the operating speed of the air cylinder that occurs at the time of switching.

Next, according to the bag making and packaging machine of the third invention, the movement of the heater member between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact the overlapping portion, and the movement of the heater at the welding position. An air cylinder for adjusting the pressing force of the member is provided, and as the air pressure supplied to the air cylinder, a high pressure air pressure for moving the heater member is generated using the air pressure supplied from a single supply source as the original pressure. A second air pressure generating means for generating a low pressure air pressure for adjusting a pressing force by using an air pressure supplied from the supply source as an original pressure;
And the heater member moving air pressure generated by the first air pressure generating means is supplied to the air cylinder when the heater member is moved between the two positions, and the second air pressure generating means is provided. And a switching means for switching the supply of these air pressures to the air cylinder so that the air pressure for adjusting the pressing force generated in the above is supplied to the air cylinder when adjusting the pressing force of the heater member. Similarly to the first invention, the switching means switches the air pressure for moving the heater member to be supplied to the air cylinder, whereby the heater member can be moved between the welding position and the retracted position, and By switching the pressing force adjusting air pressure to be supplied to the air cylinder by the switching means, the heater member at the welding position is switched. It is possible to adjust the biasing force.
As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, etc. Even if the welding position of the heater member changes due to deformation or the like due to use, the heater member can be pressed with a pressing force that is always set in accordance with the change, and the welding position is set by the air cylinder. Delicate control of the pressing force of the heater member can be performed, and therefore, the control of moving the heater member between the welding position and the retreat position and the controlling of the pressing force of the heater member can be both efficiently performed. it can.

According to the bag making and packaging machine of the fourth invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the air cylinder, the first air pressure is generated for a predetermined time. Since the control means is provided for controlling the means to add the heater member moving air pressure to the pressing force adjusting air pressure, the supply of the pressing force adjusting air pressure from the supply of the heater member moving air pressure to the supplying of the pressing member adjusting air pressure is performed in the same manner as the second invention. When it is switched to, the high pressure heater member moving air pressure is added to the pressing force adjusting air pressure for a predetermined time,
It is possible to suppress a decrease in the operating speed of the air cylinder that occurs during the switching.

According to the bag making and packaging machine of the fifth invention,
An air cylinder that moves the heater member to a welding position where the heater member contacts the overlapping portion, and moves the heater member to a retracted position where the heater member does not contact, and adjusts the pressing force of the heater member at the welding position. And a first air chamber to which air pressure is supplied to the air cylinder when the heater member is moved to the retracted position,
A second air chamber to which air pressure is supplied when the heater member is moved to the welding position or when the pressing force of the heater member is adjusted, and a heater member is provided as the air pressure supplied to the air cylinder. A first air pressure generating means for generating a high-pressure air pressure for movement as an original pressure from an air pressure supplied from a single supply source, and a low-pressure air pressure for adjusting a pressing force based on an air pressure supplied from the supply source; Second air pressure generating means for generating pressure, and heater member moving air pressure generated by the first air pressure generating means are supplied to the first air chamber when the heater member is moved to the retracted position, The heater member moving air pressure generated by the first air pressure generating means is supplied to the second air chamber when the heater member is moved to the welding position, and the second air pressure generating Switching means for switching the supply of the air pressure to the air cylinder so that the air pressure for adjusting the pressing force generated in the step is supplied to the second air chamber when adjusting the pressing force of the heater member. Therefore, by switching the heater member moving air pressure to be supplied to the first air chamber by the switching means, the heater member can be moved to the retracted position, and the heater member moving air pressure is reduced to the second air chamber. By switching to be supplied to the air chamber, the heater member can be moved to the welding position, and by switching so that the pressing force adjusting air pressure is supplied to the second air chamber, the heater member can be moved to the welding position. The pressing force of the heater member can be adjusted. As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, etc. Even if the welding position of the heater member changes due to deformation or the like due to use, the heater member can be pressed with a pressing force that is always set in accordance with the change, and the welding position is set by the air cylinder. Delicate control of the pressing force of the heater member can be performed, and therefore, the control of moving the heater member between the welding position and the retreat position and the controlling of the pressing force of the heater member can be both efficiently performed. it can.

Further, according to the bag making and packaging machine of the sixth invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the second air chamber, the first time is maintained for a predetermined time. Is provided with control means for controlling the second air chamber to apply the heater member moving air pressure to the pressing force adjusting air pressure, so that the heater member moving air pressure is supplied to the second air chamber. When the pressure is switched to the supply of the pressing force adjusting air pressure, the high pressure of the heater member moving air pressure is added to the pressing force adjusting air pressure for a predetermined period of time. Can be suppressed.

Next, according to the bag making and packaging machine of the seventh invention, the adjusting means for variably controlling the pressing force adjusting air pressure when the switching means is switched to supply the pressing force adjusting air pressure. The welding time by the heater member can be adjusted according to the thickness of the packaging material.

[0026]

Embodiments of the present invention will be described below.

As shown in FIG. 1, a bag making and packaging machine 1 according to this embodiment is provided with a roll supporting portion (not shown) for rotatably supporting a film roll above a rear portion of a machine base 2 thereof. A former 3 is formed above the front part of the machine base 2 so as to bend such that both side edges thereof are overlapped while guiding the strip-shaped film fed forward from the roll downward. A longitudinal sealing device 40 that welds both side edges of the band-shaped film overlapped by 3 to form a cylindrical packaging material, and protrudes into the cylindrical packaging material from above,
An article input chute 4 for inputting an article into the tubular packaging material is provided.

The former 3 and the chute 4 are supported by a support frame 5 mounted on the machine base 2.

A film feed mechanism 10 is provided on each of the left and right sides of the chute 4 substantially at the center in the height direction, and the feed mechanism 10 is mounted on the machine base 2 (not shown in detail). A pair of upper and lower rollers 12 and 12 supported by the cover member 11,
Belt member 1 which is wound around 2 and 12 and clamps the left and right sides of the cylindrical packaging material with the left and right sides of the chute 4 respectively.
3 and a motor (not shown) for transferring the cylindrical packaging material downward by rotating the rollers 12, 12 in a predetermined direction.

A horizontal sealing device 20 is provided at a lower portion in the machine base 2 of the packaging machine 1. The horizontal sealing device 20 includes a pair of bar members 21 and 21 (only one is shown) arranged on both front and rear sides of the cylindrical packaging material, and a support unit 22 that supports the bar members 21 and 21 so as to be able to come into contact with and separate from each other. , 22 and the bar members 21 and 21 are heated by a heater (not shown).

When the bar member 21 on the front side and the bar member 21 on the rear side come close to each other via the tubular packaging material, the tubular packaging material is sealed at two locations in the upper and lower directions in the width direction. , A cutter (not shown) provided inside the bar member 21
Cuts the cylindrical packaging material in the width direction at the middle of the upper and lower seal portions.

As shown in FIG. 1, below the machine base 2, a mounting table 30 on which products manufactured by the packaging machine 1 are mounted is provided.

Next, the vertical sealing device 40 will be described. First, as shown in FIG. 2, the vertical sealing device 40 is attached to a rotating frame 41 rotatably supported by the main body frame 6, and welds the left and right side edges of the overlapped packaging material. A heater unit 50 for supporting the heater unit 50 and slidably provided on the rotating frame 41; and moving the support unit 60 or the heater unit 50 toward and away from the chute 4. And a moving mechanism 70 for moving the moving object.

The above-mentioned heater unit 50 is shown in FIGS.
As shown in FIG. 7, a pair of upper and lower pulleys 52, 52 provided on a mounting plate 51, a heater belt 53 wound around the pulleys 52, 52, and the heater belt 53 disposed between the pulleys 52, 52. Heater block 5 for heating
4 and the pulleys 52, 52 are driven to drive the heater belt 5
3 for driving the motor 3.

The heater unit 50 presses the heater belt 53 against the chute 4 while traveling in the feeding direction of the packaging material, and sandwiches the left and right side edges where the packaging material overlaps, so that the two side edges are sandwiched. These are welded continuously.

The support unit 60 includes an arm member 61 extending in the left-right direction, a rail member 62 attached to the inner surface of the rotating frame 41, and an arm member 6.
1 and a slide member 63 which is engaged with the rail member 62 and is slidable in the front-rear direction.
The sliding of the slide member 63 causes the arm member 61 to move.
A welding position (see FIG. 8) where the heater unit 50 supported by the arm member 61 contacts and overlaps the overlapping portion of the packaging material with the heater belt 53, and a retracted position (see FIG. 8) where the contact at the welding position is released. 2). The sliding of the slide member 63 is performed by stoppers 63a provided at both ends of the rail member 62.
Is regulated by

Next, the moving mechanism 70 is shown in FIGS.
As shown in FIG. 5, a cylinder 71 having a rod 71 a having a tip fixed to the slide member 63 and a cylinder mounting plate 72 for fixing the cylinder 71 is provided inside the rotation frame 41. The motor 73 has a motor 73 attached to the inner surface of the frame 41 and a screw shaft 74 attached to a drive shaft (not shown) of the motor 73.
The inside of the cylinder 71 is partitioned by a piston member 71b, and a first air supply chamber 71c and a second air supply chamber 71d are provided.
An air passage A and a passage B for supplying air to the first air supply chamber 71d and the second air supply chamber 71d are provided, respectively. The air supply source 100 (see FIG. When the air is supplied to the first air supply chamber 71c via the first air supply chamber 71c, the rod 71a projects to move the heater unit 50 and the support unit 60 to the retracted position,
When air is supplied to the second air supply chamber 71d through the passage B, the rod 71a is retracted and the heater unit 50
And the support unit 60 is moved to the welding position. As will be described later, when the heater belt 53 contacts the overlapping portion at the welding position, the pressing force of the heater belt 53 is adjusted by the cylinder 71.

The cylinder mounting plate 72 is screwed to the screw shaft 74 at an upper portion thereof, and is provided on the lower surface of the rotating frame 41 to restrict the rotation of the cylinder mounting plate 72 by the operation of the motor 73. The members 75 are provided so that when the motor 73 operates, the cylinder mounting plate 72 moves in the longitudinal direction of the screw shaft 74 while maintaining the upright posture. And
The heater unit 50 and the support unit 60 are provided with a work position where the units 50 and 60 are brought into contact with the overlapping portion or the contact is released, and
0 is moved between the chute 4 and the non-working position which is largely separated from the chute 4.
Also, the initial position of the support unit 60 is automatically set according to the size and the mounting position of the chute 4, or the chute 4
When the unit is replaced, the units 50 and 60 are moved to a non-working position to secure a space for the replacement. The portion of the cylinder mounting plate 72 which is screwed with the screw shaft 74 is the mounting plate 72 which is screwed to the screw shaft 7.
A thick portion 72a is formed so as to be easily moved along line 4.

On the other hand, the pivot frame 41 is allowed to pivot outward (arrow X) from the set position shown by the dashed line in FIG. 6 as shown by the solid line, and inward (arrow Y) from the set position. The main body frame 6 is provided with restricting portions 6a, 6a so as to restrict rotation (see FIGS. 4 and 6).

Next, an air supply system for supplying air to the air cylinder 71 in the vertical sealing device 40 will be described.

First, as shown in FIG.
1 includes a first regulator 101 and a second regulator 10 for supplying air of a predetermined pressure to the cylinder 71, respectively.
2 are connected. On the other hand, the packaging machine 1 has an air supply source 100 for generating air or the like to be enclosed in a packaging bag, as described above, and includes the first and second regulators 101 and 101.
102 supplies air from the air supply source 100, and the first regulator 101 supplies high pressure air to the second
The regulators 102 respectively regulate the pressure of the low-pressure air.

As described above, the passages A and B for supplying the high-pressure air to the first air supply chamber 71c and the second air supply chamber 71d in the cylinder 71, respectively.
Is provided, and a passage C for supplying the low-pressure air to the second air supply chamber 71d is provided. By the operation of the first switching valve 103 and the second switching valve 104, The passage to be opened is selected from the passages A to C. That is, the first switching valve 10
3, when the passage A is opened, the passage B is closed, and the passage C is closed by the second switching valve 104, high-pressure air is supplied to the first air supply chamber 71c, and the heater unit 50 and the support unit 60 are supplied. Moves to the evacuation position and the first
When the passage A is closed by the switching valve 103, the passage B is opened, and the passage C is closed by the second switching valve 104, high-pressure air is supplied to the second air supply chamber 71d, and the heater unit 50 When the support unit 60 moves to the welding position, the passages A and B are closed by the first switching valve 103, and the passage C is opened by the second switching valve 104, low-pressure air is supplied to the second air supply chamber 71d. And the pressing force of the heater belt 53 at the welding position is adjusted.

The first and second switching valves 103, 103
The operation of the first and second regulators 104 and 104 and the motor 73 is controlled by a controller 105.

Before the operation of the packaging machine 1, the heater unit 50 and the support unit 60 are located at the non-working position with the rod 71a of the cylinder 71 protruding largely. The controller 105 operates the motor 73 to operate the unit 5.
0, 60 is moved to the working position, and the first regulator 101 and the first switching valve 103 are operated to move the units 50, 60 to the welding position. Also,
By operating the second regulator 102 and the second switching valve 104, the heater belt 53 is brought into contact with the overlapping portion of the packaging material at the welding position, so that the pressing force by the heater belt 53 is kept constant at the set value. Adjust the air pressure.

For example, if a trouble such as breakage of the packaging material occurs during welding by the heater belt 53, the cylinder unit 71 is operated to move the heater unit 50 and the support unit 60 to the retracted position, For example, when the chute 4 and the former 3 are replaced, merely moving the units 50 and 60 to the retracted position does not secure a sufficient space for the replacement. To be moved.

Further, in the present embodiment, the high-pressure air regulated by the first regulator 101 is passed through the passage C.
Is provided, and the passage C and the passage D are connected via the second switching valve 104. Then, the controller 105 closes the passages A and B by the first switching valve 103, and
When the passage C is opened by 04, that is, when low-pressure air is supplied to the second air supply chamber 71d, the second switching valve 104 makes the passage C and the passage D communicate for a predetermined time, High-pressure air is supplied to the passage C. This prevents the movement of the piston member 71b from being delayed by the action of static friction acting between the wall surface of the cylinder 71 and the piston member 71b during the supply of low-pressure air, and prevents the piston member 71b, and hence the heater unit 50 and the support unit. The unit 60 moves quickly without lowering the moving speed.

As described above, the welding by the heater belt 53 is performed by the cylinder 71 and the two regulators 10.
1 and 102, the welding position changes due to the deformation of the chute 4 during pressing and the deformation of the chute 4 due to long-term use as compared with the spring used conventionally. It is not necessary to manually adjust the pressing force of the heater belt 53.
In response to a change in the welding position due to a deformation of the chute 4 or a change in the mounting position of the chute 4, etc., it is possible to always press with a constant pressing force, and the difference between the welding position of the heater belt 53 and the retracted position. The movement of the heater belt 53 between the working position and the non-working position can be controlled by a single air supply system.

The pressures of the plurality of air can be registered in the controller 105 and automatically controlled, or can be controlled remotely.

[0049]

First, according to the bag making and packaging machine of the first invention,
An air cylinder for moving the heater member between a welding position at which the heater member contacts the overlapping portion and a retracted position at which the heater member does not contact, and adjusting a pressing force of the heater member at the welding position; Air pressure generating means for generating a high air pressure for moving a heater member or a low air pressure for adjusting a pressing force as an air pressure supplied from a single supply source as an air pressure supplied to the heater member, The heater member moving air pressure is supplied to the air cylinder when the heater member is moved between the two positions, and the pressing force adjusting air pressure generated by the generating means adjusts the pressing force of the heater member. Switching means for switching the supply of these air pressures to the air cylinder so as to be supplied to the air cylinder at the time is provided.
By switching the heater member moving air pressure to be supplied to the air cylinder by the switching means, the heater member can be moved between the welding position and the retracted position, and the pressing force adjusting force can be adjusted by the switching means. By switching so that the air pressure is supplied to the air cylinder, the pressing force of the heater member at the welding position can be adjusted. As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, and the like.
Even if the chute member is deformed due to the pressing of the heater member or the chute member is deformed due to long-term use, and the welding position of the heater member is changed, the heater member is pressed with the pressing force that is always set according to the change. And the pressing force of the heater member at the welding position can be finely controlled by the air cylinder. Therefore, the control for moving the heater member between the welding position and the retracted position, And the pressing force control described above can be efficiently achieved in a compatible manner.

Further, according to the bag making and packaging machine of the second invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the air cylinder, the air pressure for moving the heater member is maintained for a predetermined time. Is provided to the pressing force adjusting air pressure, so that when the supply of the heater member moving air pressure is switched to the pressing force adjusting air pressure, the pressing force adjusting air pressure is increased for a predetermined time. The air pressure for moving the heater member is added, and it is possible to suppress a decrease in the operating speed of the air cylinder that occurs at the time of switching.

Next, according to the bag making and packaging machine of the third invention, the movement of the heater member between the welding position where the heater member contacts the overlapping portion and the retracted position where the heater member does not contact the overlapping portion, and the movement of the heater member at the welding position. An air cylinder for adjusting the pressing force of the member is provided, and as the air pressure supplied to the air cylinder, a high pressure air pressure for moving the heater member is generated using the air pressure supplied from a single supply source as the original pressure. A second air pressure generating means for generating a low pressure air pressure for adjusting a pressing force by using an air pressure supplied from the supply source as an original pressure;
And the heater member moving air pressure generated by the first air pressure generating means is supplied to the air cylinder when the heater member is moved between the two positions, and the second air pressure generating means is provided. And a switching means for switching the supply of these air pressures to the air cylinder so that the air pressure for adjusting the pressing force generated in the above is supplied to the air cylinder when adjusting the pressing force of the heater member. Similarly to the first invention, the switching means switches the air pressure for moving the heater member to be supplied to the air cylinder, whereby the heater member can be moved between the welding position and the retracted position, and By switching the pressing force adjusting air pressure to be supplied to the air cylinder by the switching means, the heater member at the welding position is switched. It is possible to adjust the biasing force.
As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, etc. Even if the welding position of the heater member changes due to deformation or the like due to use, the heater member can be pressed with a pressing force that is always set in accordance with the change, and the welding position is set by the air cylinder. Delicate control of the pressing force of the heater member can be performed, and therefore, the control of moving the heater member between the welding position and the retreat position and the controlling of the pressing force of the heater member can be both efficiently performed. it can.

According to the bag making and packaging machine of the fourth invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the air cylinder, the first air pressure is generated for a predetermined time. Since the control means is provided for controlling the means to add the heater member moving air pressure to the pressing force adjusting air pressure, the supply of the pressing force adjusting air pressure is performed from the supply of the heater member moving air pressure to the supplying of the pressing member adjusting air pressure as in the second aspect of the present invention. When it is switched to, the high pressure heater member moving air pressure is added to the pressing force adjusting air pressure for a predetermined time,
It is possible to suppress a decrease in the operating speed of the air cylinder that occurs during the switching.

According to the bag making and packaging machine of the fifth invention,
An air cylinder that moves the heater member to a welding position where the heater member contacts the overlapping portion, and moves the heater member to a retracted position where the heater member does not contact, and adjusts the pressing force of the heater member at the welding position. And a first air chamber to which air pressure is supplied to the air cylinder when the heater member is moved to the retracted position,
A second air chamber to which air pressure is supplied when the heater member is moved to the welding position or when the pressing force of the heater member is adjusted, and a heater member is provided as the air pressure supplied to the air cylinder. A first air pressure generating means for generating a high-pressure air pressure for movement as an original pressure from an air pressure supplied from a single supply source, and a low-pressure air pressure for adjusting a pressing force based on an air pressure supplied from the supply source; Second air pressure generating means for generating pressure, and heater member moving air pressure generated by the first air pressure generating means are supplied to the first air chamber when the heater member is moved to the retracted position, The heater member moving air pressure generated by the first air pressure generating means is supplied to the second air chamber when the heater member is moved to the welding position, and the second air pressure generating Switching means for switching the supply of the air pressure to the air cylinder so that the air pressure for adjusting the pressing force generated in the step is supplied to the second air chamber when adjusting the pressing force of the heater member. Therefore, by switching the heater member moving air pressure to be supplied to the first air chamber by the switching means, the heater member can be moved to the retracted position, and the heater member moving air pressure is reduced to the second air chamber. By switching to be supplied to the air chamber, the heater member can be moved to the welding position, and by switching so that the pressing force adjusting air pressure is supplied to the second air chamber, the heater member can be moved to the welding position. The pressing force of the heater member can be adjusted. As a result, with the air cylinder, the pressing force of the heater member can be accurately set in accordance with the characteristics relating to the thickness and the material of the packaging material, etc. Even if the welding position of the heater member changes due to deformation or the like due to use, the heater member can be pressed with a pressing force that is always set in accordance with the change, and the welding position is set by the air cylinder. Delicate control of the pressing force of the heater member can be performed, and therefore, the control of moving the heater member between the welding position and the retreat position and the controlling of the pressing force of the heater member can be both efficiently performed. it can.

Further, according to the bag making and packaging machine of the sixth invention, when the switching means switches the air pressure for adjusting the pressing force to be supplied to the second air chamber, the first time is maintained for a predetermined time. Is provided with control means for controlling the second air chamber to apply the heater member moving air pressure to the pressing force adjusting air pressure, so that the heater member moving air pressure is supplied to the second air chamber. When the pressure is switched to the supply of the pressing force adjusting air pressure, the high pressure of the heater member moving air pressure is added to the pressing force adjusting air pressure for a predetermined period of time. Can be suppressed.

Next, according to the bag making and packaging machine of the seventh invention, the adjusting means for variably controlling the pressing force adjusting air pressure when the switching means is switched to supply the pressing force adjusting air pressure. The welding time by the heater member can be adjusted according to the thickness of the packaging material.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a bag making and packaging machine according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of the bag making and packaging machine.

FIG. 3 is an enlarged side view of a heating mechanism.

FIG. 4 is a view as seen from an arrow line in FIG. 2;

FIG. 5 is a view as seen from an arrow line in FIG. 2;

FIG. 6 is a plan view showing a rotating state of the rotating frame.

FIG. 7 is a system configuration diagram of a vertical sealing device.

FIG. 8 is a plan view showing a welded state of the vertical sealing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag-making and packaging machine 3 Former 4 Chute 20 Horizontal sealing device 40 Vertical sealing device 41 Rotating frame 50 Heater unit 53 Heater belt 60 Supporting unit 61 Arm member 62 Rail member 63 Slide member 70 Moving mechanism 71 Cylinder 73 Motor 74 Screw shaft 101 First regulator 102 Second regulator 103 First switching valve 104 Second switching valve 105 Controller

Claims (7)

[Claims] 1. A bag-making method in which the overlapping portions of the left and right side edges of the packaging material bent around the chute member are pressed against the chute member by a heater member capable of coming into contact with and separating from the chute member, thereby forming a bag. An air cylinder for moving a heater member between a welding position at which a heater member contacts the overlapping portion and a retracted position at which the heater member does not contact, and adjusting a pressing force of the heater member at the welding position. Air pressure generating means for generating, as the air pressure supplied to the air cylinder, a high air pressure for moving the heater member or a low air pressure for adjusting the pressing force, using an air pressure supplied from a single supply source as an original pressure. And the heater member moving air pressure generated by the generating means is supplied to the air cylinder when the heater member is moved between the two positions, and Switching means for switching the supply of these air pressures to the air cylinder is provided so that the pressing force adjusting air pressure generated in the step is supplied to the air cylinder when adjusting the pressing force of the heater member. A bag making and packaging machine characterized by that: 2. A control means for adding a heater member moving air pressure to a pressing force adjusting air pressure for a predetermined time when the pressing force adjusting air pressure is switched to be supplied to an air cylinder by a switching means. The bag making and packaging machine according to claim 1, wherein the bag making and packaging machine is provided. 3. A bag-making machine wherein the overlapping portions of the left and right side edges of the packaging material bent around the chute member are pressed against the chute member by a heater member capable of coming into contact with and separating from the chute member. An air cylinder for moving a heater member between a welding position at which a heater member contacts the overlapping portion and a retracted position at which the heater member does not contact, and adjusting a pressing force of the heater member at the welding position. A first air pressure generating means for generating, as an air pressure supplied to the air cylinder, a high air pressure for moving the heater member from an air pressure supplied from a single supply source as an original pressure, and a pressing force adjusting means. A second air pressure generating means for generating the low pressure air pressure using the air pressure supplied from the supply source as an original pressure, and a heater member moving means for moving the heater member generated by the first air pressure generating means. The air pressure is supplied to the air cylinder when the heater member is moved between the two positions, and the pressing force adjusting air pressure generated by the second air pressure generating means adjusts the pressing force of the heater member. Switching means for switching the supply of these air pressures to the air cylinder so as to be supplied to the air cylinder. 4. When the switching means switches the air pressure for adjusting the pressing force to be supplied to the air cylinder, the first air pressure generating means reduces the air pressure for moving the heater member for a predetermined time for the adjustment of the pressing force. The bag making and packaging machine according to claim 3, further comprising control means for controlling the pressure to be added to the air pressure. 5. A bag-making machine wherein the overlapping portions of the left and right side edges of the packaging material bent around the chute member are pressed against the chute member by a heater member capable of coming into contact with and separating from the chute member. A packaging machine, wherein the heater member moves to a welding position where the heater member contacts the overlapping portion, and the heater member moves to a retracted position where the heater member does not contact the overlapping portion, and a pressing force of the heater member at the welding position. And a first air chamber to which air pressure is supplied when the heater member is moved to the retracted position, and the heater member is moved to the welding position. Air pressure is supplied when the pressure is adjusted or when the pressing force of the heater member is adjusted.
A first air pressure generating means for generating, as an air pressure supplied to the air cylinder, a high air pressure for moving the heater member using an air pressure supplied from a single supply source as an original pressure. A second air pressure generating means for generating a low pressure air pressure for adjusting the pressing force by using an air pressure supplied from the supply source as an original pressure; and a heater member moving air pressure generated by the first air pressure generating means. When the heater member is moved to the evacuation position, the heater member is supplied to the first air chamber, and the heater member moving air pressure generated by the first air pressure generating means moves the heater member to the welding position. The pressing force adjusting air pressure supplied to the second air chamber and generated by the second air pressure generating means is supplied to the second air chamber when adjusting the pressing force of the heater member. Bag making and packaging machine, characterized by a switching means for switching the supply to the air cylinder these air pressure is provided. 6. When the switching means switches the air pressure for adjusting the pressing force to be supplied to the second air chamber, the first air pressure generating means switches the heater to the second air chamber for a predetermined time. The bag making and packaging machine according to claim 5, further comprising control means for controlling the member moving air pressure to be added to the pressing force adjusting air pressure. 7. An adjusting means for variably controlling the pressing force adjusting air pressure when the switching means is switched to supply the pressing force adjusting air pressure. A bag making and packaging machine according to any one of claims 6 to 6.