JP2021187438A - Bag making and packaging machine - Google Patents

Abstract

To provide a bag making and packaging machine which suppresses occurrence of failure of a vertical seal.SOLUTION: A bag making and packaging machine includes a vertical seal mechanism for forming a film into a cylindrical shape by sealing side edge parts on both sides of a film. The vertical seal mechanism has a pair of heat seal parts, and a conveyance part. The pair of heat seal parts sandwiches in a palm-joint state and heat-seals the side edge parts on both sides of the film. The conveyance part conveys the film along a longitudinal direction. When receiving a stop signal of the bag making and packaging machine during execution of a cycle operation of the vertical seal by the vertical seal mechanism, a control part of the bag making and packaging machine finishes the cycle operation in execution, and then, causes the heat seal parts to sandwich film side edge parts to be heat-sealed in a next cycle operation, and then, causes the heat seal parts to release the sandwiching of the film side edge parts, and stops the bag making and packaging machine.SELECTED DRAWING: Figure 9

Description

The present invention relates to a bag making and packaging machine.

Conventionally, as described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2010-6387), a bag-making and packaging machine provided with a vertical sealing mechanism for sealing the side edges on both sides of the film to form the film into a tubular shape has been used. Has been done. In this vertical sealing mechanism, the side edges on both sides of the film are sandwiched between a pair of sealing jaws in a palm-to-hand state and heat-sealed.

However, when the bag making and packaging machine is stopped, the film side edge before being sealed may be located between the pair of seal jaws. In this case, the heat of the seal jaws may deform the film side edges, and the pair of seal jaws may not normally pinch the film side edges when the operation is restarted.

An object of the present invention is to provide a bag making and packaging machine that suppresses the occurrence of defects in vertical seals.

The bag-making and packaging machine according to the first aspect of the present invention includes a vertical sealing mechanism that seals the side edges on both sides of the film to form a tubular shape. The bag-making and packaging machine includes a control unit that controls the bag-making and packaging machine. The vertical seal mechanism has a pair of heat seal portions and a transport portion. The pair of heat-sealed portions sandwich the side edges on both sides of the film in a palm-to-hand state and heat-seal. The transport section transports the film along its longitudinal direction. The control unit repeats the following cycle operations (a) to (d) while the bag making / packaging machine is in operation.
(A) The heat seal portion at the first position where the film side edge portion is not sandwiched is moved to the second position where the film side edge portion is sandwiched.
(B) After that, the heat-sealing portion sandwiching the film side edge portion is moved along the film longitudinal direction so as to be interlocked with the transport of the film by the transport portion.
(C) After that, the pinching of the film side edge portion by the heat seal portion is released.
(D) After that, the heat seal portion is moved to the first position.

When the control unit receives a stop signal from the bag making and packaging machine during the execution of the cycle operation, the control unit heat-seals the side edge of the film to be heat-sealed in the next cycle operation after the running cycle operation is terminated. Then, after releasing the pinching of the film side edge portion by the heat sealing portion, the bag making and packaging machine is stopped.

When the bag making / packaging machine according to the first aspect receives an operation stop signal during the cycle operation of the vertical seal, the operation is stopped after completing the vertical seal of the portion to be vertically sealed in the next cycle operation. Therefore, it is possible to prevent the film side edge portion before being vertically sealed from being deformed by the heat of the heat sealing portion. Therefore, this bag-making and packaging machine can suppress the occurrence of defects in the vertical seal.

The bag-making and packaging machine according to the second aspect of the present invention includes a vertical sealing mechanism that seals the side edges on both sides of the film and forms the film into a cylindrical shape. The bag-making and packaging machine includes a control unit that controls the bag-making and packaging machine. The vertical seal mechanism has a pair of heat seal portions and a transport portion. The pair of heat-sealed portions sandwich the side edges on both sides of the film in a palm-to-hand state and heat-seal. The transport section transports the film along its longitudinal direction. The control unit repeats the following cycle operations (a) to (d) while the bag making / packaging machine is in operation.
(A) The heat seal portion at the first position where the film side edge portion is not sandwiched is moved to the second position where the film side edge portion is sandwiched.
(B) After that, the heat-sealing portion sandwiching the film side edge portion is moved along the film longitudinal direction so as to be interlocked with the transport of the film by the transport portion.
(C) After that, the pinching of the film side edge portion by the heat seal portion is released.
(D) After that, the heat seal portion is moved to the first position.

When the control unit receives a stop signal from the bag making / packaging machine during the execution of the cycle operation, the control unit releases the pinching of the film side edge portion by the heat seal unit in the execution cycle operation, and then the heat seal unit. The bag making and packaging machine is stopped before moving the bag to the first position.

When the bag making / packaging machine according to the second aspect receives an operation stop signal during the cycle operation of the vertical seal, the operation is stopped after completing the vertical seal of the portion to be vertically sealed in the running cycle operation. This prevents the side edge of the film before being vertically sealed from being deformed by the heat of the heat-sealed portion. Therefore, this bag-making and packaging machine can suppress the occurrence of defects in the vertical seal.

The bag-making / packaging machine according to the third aspect of the present invention is the bag-making / packaging machine according to the first aspect, and the first position is the film length of the heat-sealed portion sandwiching the film side edge portion in the cycle operation. This is the position of the heat-sealed portion in the longitudinal direction of the film before moving along the direction.

The bag-making / packaging machine according to the fourth aspect of the present invention is the bag-making / packaging machine according to the second aspect, and the first position is the film length of the heat-sealed portion sandwiching the film side edge portion in the cycle operation. This is the position of the heat-sealed portion in the longitudinal direction of the film after being moved along the direction.

The bag-making / packaging machine according to the fifth aspect of the present invention is the bag-making / packaging machine according to the first aspect, and the control unit operates the bag-making / packaging machine after receiving a stop signal of the bag-making / packaging machine. When restarting, the film is conveyed along its longitudinal direction by the distance conveyed in one cycle operation before moving the heat seal portion to the second position.

The bag-making and packaging machine according to the present invention can suppress the occurrence of defects in the vertical seal.

It is a perspective view of the bag making packaging machine 10 which concerns on embodiment. It is a perspective view which shows the schematic structure of the bag making packaging unit 12. It is a perspective view of the film F in the part molded into a cylinder by a molding mechanism 21. It is a schematic side view which looked at the side seal mechanism 23 from the right side of FIG. It is a cross-sectional view of a pair of heat seal portions 31, 32. It shows a state in which the side edge portions R1 and R2 are not sandwiched by the pair of heat seal portions 31, 32. It is a cross-sectional view of a pair of heat seal portions 31, 32. The state where the side edge portions R1 and R2 are sandwiched by the pair of heat seal portions 31 and 32 is shown. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from the front. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from the front. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from the front. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from the front. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from above. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from above. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from above. It is the figure which looked at the cycle operation of a pair of heat seal portions 31, 32 from above. It is a time chart of the operation of the vertical seal mechanism 22. It is a figure for demonstrating the problem in the case where the control unit 16 does not execute the vertical seal of the portion to be vertically sealed in the next cycle operation during execution. It is a figure for demonstrating the problem in the case where the control unit 16 does not execute the vertical seal of the portion to be vertically sealed in the next cycle operation during execution. It is a time chart of the operation of the vertical seal mechanism 22 in the modification A. It is a figure which looked at the cycle operation of a pair of heat seal portions 31, 32 in the modification B from the front. It is a figure which looked at the cycle operation of a pair of heat seal portions 31, 32 in the modification B from the front. It is a figure which looked at the cycle operation of a pair of heat seal portions 31, 32 in the modification B from the front. It is a figure which looked at the cycle operation of a pair of heat seal portions 31, 32 in the modification B from the front.

An embodiment of the present invention will be described with reference to the drawings. The embodiments described below are one of the specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Overall Configuration FIG. 1 is a perspective view of a bag making / packaging machine 10 according to an embodiment of the present invention. The bag making and packaging machine 10 is a device for bagging articles such as food. The bag-making and packaging machine 10 is mainly composed of a combination weighing unit 11, a bag-making and packaging unit 12, and a film supply unit 13.

The combination weighing unit 11 is arranged above the bag making and packaging unit 12. The combination weighing unit 11 weighs the article with a plurality of weighing hoppers, and combines the values of the weights weighed by each weighing hopper so as to have a predetermined total weight. The combination weighing unit 11 discharges articles having a predetermined total weight downward and supplies them to the bag making / packaging unit 12.

The bag-making and packaging unit 12 seals and packages the articles in the bag at the timing when the articles are supplied from the combination weighing unit 11. The bag-making and packaging unit 12 puts an article into the bag and seals it while forming the film supplied from the film supply unit 13 into a bag.

The film supply unit 13 is installed adjacent to the bag making / packaging unit 12 and supplies the film to the bag making / packaging unit 12. The film supply unit 13 continuously feeds the film from the film roll around which the sheet-shaped film is wound, and supplies the film to the bag making and packaging unit 12.

The bag making and packaging machine 10 includes an operation switch 14 and a liquid crystal display 15. The operation switch 14 and the liquid crystal display 15 are attached to the front surface of the main body of the bag making / packaging machine 10. The operation switch 14 is arranged at a position where the operator of the bag making / packaging machine 10 can operate the operation switch 14. The liquid crystal display 15 is arranged at a position that can be visually recognized by the operator of the bag making / packaging machine 10. The liquid crystal display 15 is a touch panel type display. The operation switch 14 and the liquid crystal display 15 function as an input device for receiving instructions to the bag making / packaging machine 10 and settings related to the bag making / packaging machine 10. The liquid crystal display 15 functions as an output device that displays information about the bag making / packaging machine 10.

The bag making / packaging machine 10 includes a control unit 16. The control unit 16 is a computer composed of a CPU, a ROM, a RAM, and the like. The control unit 16 is built in the main body of the bag making / packaging machine 10 and is connected to the combination measuring unit 11, the bag making / packaging unit 12, the film supply unit 13, the operation switch 14, and the liquid crystal display 15. The control unit 16 controls the combination weighing unit 11, the bag making packaging unit 12, and the film supply unit 13 based on the inputs from the operation switch 14 and the liquid crystal display 15, and outputs various information to the liquid crystal display 15.

(2) Configuration of Bag-making and Packaging Unit 12 FIG. 2 is a perspective view showing a schematic configuration of the bag-making and packaging unit 12. In the following description, six directions consisting of "front (front)", "rear (rear)", "top", "bottom", "left" and "right" are defined as shown in FIG. ..

The bag making and packaging unit 12 is mainly composed of a molding mechanism 21, a vertical sealing mechanism 22, and a horizontal sealing mechanism 23. The molding mechanism 21 forms the sheet-shaped film F supplied from the film supply unit 13 into a cylindrical shape. The vertical sealing mechanism 22 vertically seals the film F formed into a cylindrical shape by the forming mechanism 21 to form a tubular film Fc. The horizontal sealing mechanism 23 horizontally seals the tubular film Fc formed by the vertical sealing mechanism 22 to form the bag B.

The bag-making and packaging unit 12 forms the bag B while continuously transporting the film F supplied from the film supply unit 13. While the bag-making and packaging machine 10 is in operation, the bag-making and packaging unit 12 can continuously form the bag B from the film F without stopping the transfer of the film F.

(2-1) Molding mechanism 21
The molding mechanism 21 has a tube 21a and a former 21b. The tube 21a is a cylindrical member having an open upper end and a lower end. Article A supplied from the combination weighing unit 11 is charged into the opening at the upper end of the tube 21a. The former 21b is arranged so as to surround the tube 21a. The film F unwound from the film supply unit 13 winds around the tube 21a and is formed into a cylindrical shape when passing through the gap between the tube 21a and the former 21b. The tube 21a and the former 21b can be replaced according to the size of the bag B to be manufactured.

As shown in FIG. 3, the film F formed into a cylindrical shape by the forming mechanism 21 has a pair of side edge portions R1 and R2 facing each other. The pair of side edge portions R1 and R2 are both ends of the film F in a direction orthogonal to the longitudinal direction LD of the film F. That is, the side edge portions R1 and R2 of the film F extend along the longitudinal direction LD of the film F. As shown in FIGS. 2 and 3, the pair of side edge portions R1 and R2 extend in the front-rear direction toward the front side of the tubular film F. The tube 21a and the former 21b have a shape such that a pair of side edge portions R1 and R2 are formed on the film F.

(2-2) Vertical seal mechanism 22
The vertical sealing mechanism 22 seals the film F formed into a cylindrical shape by the forming mechanism 21 in the vertical direction (vertical direction in FIG. 2). The vertical seal mechanism 22 mainly has a pair of heat seal portions 31 and 32 and a transport portion 33.

The pair of heat seal portions 31, 32 are arranged on the front side of the tube 21a. The pair of heat-sealing portions 31 and 32 have a heater, and side edge portions R1 and R2 on both sides of the tubular film F are sandwiched and heat-sealed in a palm-shaped state. The heat seal is a method in which a part of the film F is heated to be temporarily softened, and the softened parts are welded to each other to seal the film F. The pair of heat-sealing portions 31, 32 vertically seal the side edge portions R1 and R2 on both sides of the film F to form a tubular film Fc. The pair of heat seal portions 31, 32 have predetermined dimensions along the vertical direction.

The transport portion 33 is arranged at a height position in the vicinity of the pair of heat seal portions 31, 32. The transport unit 33 transports the film F wound around the tube 21a downward along the longitudinal LD. The transport unit 33 mainly has a drive roller 33a, a driven roller 33b, and a pair of belts 33c. As shown in FIG. 2, the pair of belts 33c are arranged so as to sandwich the tube 21a on both the left and right sides of the tube 21a. The pair of belts 33c has a mechanism for adsorbing the film F. The transport unit 33 is driven downward by the pair of belts 33c being rotationally driven by the drive roller 33a and the driven roller 33b, while adsorbing the film F. The vertical position of the tubular film F can be adjusted by the transport unit 33.

(2-3) Horizontal seal mechanism 23
The lateral sealing mechanism 23 seals the tubular film Fc in the lateral direction (horizontal direction in FIG. 2). The lateral sealing mechanism 23 forms a bag B whose upper end and lower end are laterally sealed from the tubular film Fc. The horizontal sealing mechanism 23 is arranged below the molding mechanism 21 and the vertical sealing mechanism 22.

FIG. 4 is a schematic side view of the lateral seal mechanism 23 as viewed from the right side of FIG. The lateral seal mechanism 23 mainly includes a first rotating body 50a and a second rotating body 50b. The first rotating body 50a is arranged on the front side of the tubular film Fc. The second rotating body 50b is arranged behind the tubular film Fc.

The first rotating body 50a mainly includes a first rotating shaft 53a, a first seal jaw 51a, and a second seal jaw 52a. The second rotating body 50b mainly includes a second rotating shaft 53b, a first seal jaw 51b, and a second seal jaw 52b. When viewed along the left-right direction, the first rotating body 50a rotates about the rotation center C1 of the first rotating shaft 53a with the first rotating shaft 53a as the rotating axis. The second rotating body 50b rotates about the rotation center C2 of the second rotating shaft 53b with the second rotating shaft 53b as the rotating axis when viewed along the left-right direction. When the lateral seal mechanism 23 is viewed along the left-right direction, the pair of first seal jaws 51a and 51b rotate synchronously in opposite directions, and the pair of second seal jaws 52a and 52b synchronize in opposite directions. Rotate. In FIG. 4, the trajectories of the pair of first seal jaws 51a and 51b and the pair of second seal jaws 52a and 52b are shown by chain lines.

The lateral seal mechanism 23 uses a pair of first seal jaws 51a and 51b or a pair of second seal jaws 52a and 52b to move the tubular film Fc along the lateral direction intersecting the transport direction of the tubular film Fc. Insert it. The pair of first seal jaws 51a and 51b and the pair of second seal jaws 52a and 52b have heaters. The pair of first seal jaws 51a, 51b or the pair of second seal jaws 52a, 52b laterally seal the tubular film Fc by sandwiching and heat-sealing the tubular film Fc.

(3) Operation of the bag-making / packaging machine 10 (3-1) Overall operation The outline of the operation of the bag-making / packaging machine 10 to seal the article A in the bag B will be described.

The film F supplied from the film supply unit 13 to the bag making and packaging unit 12 is formed into a tubular shape by the molding mechanism 21, and then is vertically sealed by the pair of heat sealing portions 31 and 32 of the vertical sealing mechanism 22. , Cylindrical film Fc is formed.

The tubular film Fc is continuously conveyed downward by the conveying portion 33 of the vertical sealing mechanism 22, and laterally at predetermined intervals along the longitudinal LD (longitudinal direction) of the film F by the horizontal sealing mechanism 23. It will be sealed. The lateral seal mechanism 23 sandwiches the tubular film Fc with a pair of first seal jaws 51a and 51b or a pair of second seal jaws 52a and 52b to laterally seal the tubular film Fc.

Immediately after the tubular film Fc is laterally sealed by the lateral sealing mechanism 23, the article A weighed by the combination weighing unit 11 falls in the tube 21a and is charged into the tubular film Fc. The article A loaded into the tubular film Fc stays above the previously laterally sealed portion. When the tubular film Fc is next laterally sealed by the lateral sealing mechanism 23, the lateral sealing mechanism 23 is placed at a height above the article A previously placed in the tubular film Fc. Side seal. As a result, the article A in the tubular film Fc is sandwiched and sealed in the laterally sealed portions above and below.

The laterally sealed portion of the tubular film Fc is laterally sealed by a cutter (not shown) built in the first seal jaw 51a or the second seal jaw 52a at the timing when the tubular film Fc is laterally sealed. Cut in the direction. As a result, the bag B in which the article A is enclosed is separated from the subsequent tubular film Fc.

By the above steps, the bag B in which the article A is enclosed is continuously manufactured. The manufactured bag B is then transferred to a device such as a thickness checker and a weight checker by a belt conveyor or the like.

The bag-making and packaging machine 10 may perform bag-making in the form of a continuous bag in which a plurality of bags B are connected. In this case, each time a predetermined number of bags B are formed by the lateral sealing mechanism 23, the laterally sealed portion of the tubular film Fc is cut laterally.

(3-2) Operation of Vertical Seal Mechanism 22 In the vertical seal mechanism 22, the pair of heat seal portions 31 and 32 sandwich the side edge portions R1 and R2 on both sides of the film F formed into a tubular shape in a palm-to-hand state. Heat seal. 5 and 6 are cross-sectional views of the pair of heat seal portions 31, 32. 5 and 6 are cross-sectional views cut along a plane orthogonal to the vertical direction. FIG. 5 shows a state in which the side edge portions R1 and R2 are not sandwiched by the pair of heat seal portions 31, 32. FIG. 6 shows a state in which the side edge portions R1 and R2 are sandwiched between the pair of heat seal portions 31, 32. As shown in FIGS. 5 and 6, the side edge portions R1 and R2 on both sides of the film F wound around the tube 21a are close to each other, and are in the radial direction of the tube 21a when viewed along the vertical direction. It is along the front-back direction. Since the side edge portions R1 and R2 extend along the longitudinal LD of the film F, the side edge portions R1 and R2 are heat-sealed and welded to each other by a pair of heat-sealing portions 31 and 32 to form a tubular shape. The film F formed on the surface is vertically sealed.

The pair of heat-sealed portions 31, 32 is composed of a first heat-sealed portion 31 and a second heat-sealed portion 32. The first heat seal unit 31 and the second heat seal unit 32 are configured to be movable within a predetermined range along the vertical direction by a drive motor. The drive motor can change the positions of the first heat seal portion 31 and the second heat seal portion 32 in the vertical direction in synchronization with each other. The second heat seal portion 32 is configured to be movable within a predetermined range along the left-right direction by an air cylinder. The air cylinder can change the distance between the first heat seal portion 31 and the second heat seal portion 32 in the left-right direction. When the air cylinder changes this interval, the first heat seal portion 31 and the second heat seal portion 32 sandwich the side edge portions R1 and R2, and release the state in which the side edge portions R1 and R2 are sandwiched. can do. As shown in FIGS. 5 and 6, when the first heat seal portion 31 and the second heat seal portion 32 sandwich the side edge portions R1 and R2, the first heat seal portion 31 comes into contact with the side edge portion R1. , The second heat seal portion 32 comes into contact with the side edge portion R2. The second heat seal portion 32 has a built-in heater for heating the side edge portions R1 and R2 while sandwiching the side edge portions R1 and R2 together with the first heat seal portion 31. On the other hand, the first heat seal portion 31 does not have such a heater built-in.

The control unit 16 controls the vertical sealing mechanism 22 during the operation of the bag making / packaging machine 10 to adjust the positions of the pair of heat sealing units 31 and 32 and the positions of the film F formed into a cylindrical shape. can do. As will be described next, the control unit 16 performs a cycle operation in which the positions of the pair of heat seal units 31 and 32 are periodically changed.

FIG. 7 is a front view of the cycle operation of the pair of heat seal portions 31, 32. FIG. 8 is a view of the cycle operation of the pair of heat seal portions 31 and 32 as viewed from above. FIG. 8 is a cross-sectional view of the pair of heat seal portions 31, 32 at height positions. 7 (a) to 7 (d) correspond to FIGS. 8 (a) to 8 (d), respectively. As shown in FIGS. 7 and 8, during the execution of the cycle operation, the first heat seal portion 31 reciprocates within a predetermined range along the vertical direction, and the second heat seal portion 32 moves in the horizontal direction and the vertical direction. By moving within a predetermined range along the box motion, the box motion is repeated. During the execution of the cycle operation, the first heat seal portion 31 is in contact with the side edge portion R1 or is at a position extremely close to the side edge portion R1 in the left-right direction. The "extremely close position" is, for example, a position where the distance between the first heat seal portion 31 and the side edge portion R1 is less than 1 mm.

While the pair of heat-sealing portions 31 and 32 are performing the cycle operation, the tubular film F and the tubular film Fc are conveyed downward by the conveying portion 33. Next, the control by the control unit 16 during the execution of the cycle operation of the pair of heat seal units 31 and 32 will be described with reference to FIGS. 7 and 8.

First, as shown in FIGS. 7 (a) and 8 (a), the pair of heat seal portions 31 and 32 are located at the first position P1 that does not sandwich the side edge portions R1 and R2 of the film F. Specifically, the first position P1 is a position where the distance between the second heat seal portion 32 and the side edge portion R2 is secured to be a predetermined length or more. The predetermined length is a length that sufficiently reduces the deformation of the side edge portions R1 and R2 of the film F due to the heat of the second heat seal portion 32. The predetermined length depends on the material of the film F and the temperature of the second heat seal portion 32, but is, for example, at least 30 mm. In FIGS. 7 (a) and 8 (a), the pair of heat seal portions 31 and 32 are located at the uppermost position in the vertical movable range thereof. The first position P1 is the starting point of the cycle operation.

Next, the control unit 16 sandwiches the pair of heat seal portions 31, 32 at the first position P1 that does not sandwich the side edge portions R1 and R2 of the film F, and the second position that sandwiches the side edge portions R1 and R2 of the film F. Move to P2. In FIGS. 7 (b) and 8 (b), the pair of heat seal portions 31 and 32 are located at the second position P2. The control unit 16 moves the pair of heat seal units 31 and 32 from the first position P1 to the second position P2 by moving the second heat seal unit 32 to the left and bringing it closer to the first heat seal unit 31. Let me. The pair of heat seal portions 31 and 32 at the second position P2 come into contact with the side edge portions R1 and R2, respectively, and heat the side edge portions R1 and R2, respectively. In FIGS. 7 (b) and 8 (b), the pair of heat seal portions 31 and 32 are located at the uppermost position in the movable range in the vertical direction.

Next, the control unit 16 has a pair of heat seal portions 31, 32 sandwiching the side edge portions R1 and R2 along the longitudinal LD so as to interlock with the downward transfer of the film F by the transfer unit 33. Move it down. That is, the pair of heat seal portions 31, 32 move downward by a predetermined distance at the same speed as the transport speed of the film F while sandwiching the side edge portions R1 and R2. In FIGS. 7 (c) and 8 (c), the pair of heat seal portions 31 and 32 are located at the third position P3 below the second position P2. In FIGS. 7 (c) and 8 (c), the pair of heat seal portions 31, 32 are located at the lowermost position in the vertical movable range thereof. The pair of heat-sealing portions 31 and 32 heat-seal the side edge portions R1 and R2 of the film F while moving from the second position P2 to the third position P3.

Next, the control unit 16 releases the sandwiching of the side edge portions R1 and R2 by the pair of heat seal portions 31, 32. Specifically, as shown in FIGS. 7 (d) and 8 (d), the control unit 16 moves the second heat seal unit 32 to the right and separates it from the first heat seal unit 31. , The side edge portions R1 and R2 are not sandwiched by the pair of heat seal portions 31, 32. In this state, the side edge portions R1 and R2 are heat-sealed, and the vertical sealing of the film F in the running cycle operation is completed. In FIGS. 7 (d) and 8 (d), the pair of heat seal portions 31 and 32 are located at the fourth position P4, and are located at the lowermost position in the vertical movable range thereof.

Next, the control unit 16 moves the first heat seal unit 31 and the second heat seal unit 32 upward along the longitudinal direction LD. As a result, the pair of heat seal portions 31 and 32 move from the fourth position P4 to the first position P1 and are in the states shown in FIGS. 7 (a) and 8 (a).

In the present embodiment, the first position P1 is a pair of heat-sealed portions 31, 32 that sandwich the side edge portions R1 and R2 of the film F before being moved along the longitudinal LD in the cycle operation. This is the position of the LD in the longitudinal direction of the heat seal portions 31 and 32. That is, the first position P1 is the uppermost position in the vertical movable range of the pair of heat seal portions 31, 32.

The vertical dimension of the pair of heat seal portions 31, 32 is, for example, 350 mm, although it depends on the dimensions of the film F and the bag B. The distance that the pair of heat seal portions 31 and 32 move in the vertical direction in one cycle operation, that is, the dimension of the vertical movable range of the pair of heat seal portions 31 and 32 is, for example, 150 mm. Depending on the dimensions of the pair of heat-sealed portions 31, 32 and the moving distance in the vertical direction, the portions vertically sealed by the pair of heat-sealed portions 31, 32 may overlap each other in continuous cycle operation. In this case, the side edge portions R1 and R2 of the film F have a region that is vertically sealed a plurality of times by the pair of heat sealing portions 31 and 32.

In the present embodiment, when the control unit 16 receives a stop signal of the bag making / packaging machine 10 during the execution of the cycle operation, the control unit 16 ends the running cycle operation and then is heat-sealed in the next cycle operation. The edge portions R1 and R2 are sandwiched between the pair of heat seal portions 31 and 32, and then the sandwiching of the side edge portions R1 and R2 by the pair of heat seal portions 31 and 32 is released, and then the bag making and packaging machine 10 is stopped. .. Therefore, when the control unit 16 receives the stop signal of the bag making / packaging machine 10 during the execution of the cycle operation, the control unit 16 does not immediately stop the bag making / packaging machine 10. Instead, the control unit 16 stops the bag making and packaging machine 10 after completing the vertical sealing of the side edge portions R1 and R2 to be vertically sealed in the next cycle operation after ending the running cycle operation. Let me. Next, the details of this operation will be described.

FIG. 9 is a time chart of the operation of the vertical seal mechanism 22. The horizontal axis of FIG. 9 represents the time. The time on the leftmost side of the horizontal axis in FIG. 9 is the time S0 when the control unit 16 discloses the operation of the bag making / packaging machine 10. FIG. 9A is a time chart of the operation of the transport unit 33. The vertical axis of the chart in FIG. 9A represents the speed of the film F conveyed by the conveying unit 33. During the operation of the bag making and packaging machine 10, the film F is conveyed downward along the longitudinal LD at a constant speed V by the belt 33c of the conveying portion 33. FIG. 9B is a time chart of the operation of the air cylinder for changing the position of the second heat seal portion 32 in the left-right direction. In FIG. 9B, while the air cylinder is in the “OFF” state, the pair of heat seal portions 31 and 32 do not sandwich the side edge portions R1 and R2. While the air cylinder is in the "ON" state, the pair of heat seal portions 31, 32 sandwich the side edge portions R1 and R2. FIG. 9C is a time chart of the operation of the drive motor for changing the vertical positions of the pair of heat seal portions 31, 32. The vertical axis of the chart in FIG. 9 (c) represents the vertical speeds of the pair of heat seal portions 31, 32. In FIG. 9C, the “DROP” side indicates that the pair of heat seal portions 31 and 32 are moving downward, and the “RETURN” side indicates that the pair of heat seal portions 31 and 32 are moving downward. Indicates that it is moving upward. 9 shows the time S1 when the control unit 16 receives the stop signal of the bag making / packaging machine 10 and the time S2 when the control unit 16 restarts the operation of the bag making / packaging machine 10 after the bag making / packaging machine 10 is stopped. It is shown. One cycle operation is an operation performed during the period from the time when the position of the heat seal portion becomes the first position P1 to the time when the position of the heat seal portion becomes the first position P1 again. As shown in FIG. 9, in the first cycle operation, the control unit 16 starts the transfer of the film F and at the same time moves the pair of heat seal units 31 and 32 in the vertical direction by the drive motor, but by the air cylinder. The side edge portions R1 and R2 are sandwiched between the pair of heat seal portions 31 and 32 to prevent heat sealing.

When the control unit 16 receives the stop signal of the bag making / packaging machine 10 at time S1, the control unit 16 continues the running cycle operation without stopping it. The running cycle operation ends at time t1. At this time, the pair of heat seal portions 31, 32 are at the first position P1. When the control unit 16 receives the stop signal of the bag making / packaging machine 10, the control unit 16 stops the transfer of the film F by the transfer unit 33 at the time t1 when the running cycle operation ends. After that, the control unit 16 moves the pair of heat seal portions 31 and 32 at the first position P1 to the second position P2 by the air cylinder, and the pair of heat seal portions 31 and 32 use the side edge portions R1 and R2. Insert it. The side edges R1 and R2 before being sandwiched are not heat-sealed. Next, the control unit 16 heat-seals the side edge portions R1 and R2 while maintaining the state in which the side edge portions R1 and R2 are sandwiched between the pair of heat seal portions 31 and 32 for a predetermined period. After that, the control unit 16 releases the sandwiching of the side edge portions R1 and R2 by the pair of heat seal portions 31 and 32 by the air cylinder, and the pair of heat seal portions 31 and 32 are moved from the second position P2 to the first position P1. Move to. The period t2 to t3 in FIG. 9 is a period in which the pair of heat seal portions 31, 32 sandwich the side edge portions R1 and R2. After that, the control unit 16 stops the bag making / packaging machine 10. Therefore, when the bag making / packaging machine 10 is stopped, the distance between the second heat sealing portion 32 and the side edge portion R2 is secured to be a predetermined length or more. At this time, the side edge portions R1 and R2 between the pair of heat seal portions 31 and 32 are heat-sealed.

In FIG. 9, after the bag making / packaging machine 10 is stopped, the control unit 16 restarts the operation of the bag making / packaging machine 10 at time S2. In this case, the control unit 16 starts the transport of the film F, and at the same time, moves the pair of heat seal units 31 and 32 in the vertical direction by the drive motor to start the cycle operation. At this time, the side edge portions R1 and R2 between the pair of heat seal portions 31 and 32 are already heat-sealed. Therefore, as shown in FIG. 9, in the first cycle operation after restarting the operation of the bag making / packaging machine 10, the control unit 16 uses a pair of heat seal units 31 and 32 to perform side edge portions R1 and R2 by an air cylinder. Do not pinch and heat seal.

(4) Features In the bag-making and packaging machine 10, the side edge portions R1 and R2 on both sides of the film F formed into a tubular shape are heat-sealed in the vertical direction by a pair of heat-sealing portions 31 and 32 of the bag-making and packaging unit 12. To form a tubular film Fc. During the operation of the bag making / packaging machine 10, the control unit 16 performs a cycle operation of the pair of heat seal units 31 and 32 as shown in FIGS. 7 and 8 while transporting the film F downward. When the control unit 16 receives the operation stop signal of the bag making / packaging machine 10 during the cycle operation, the control unit 16 completes the vertical seal of the portion to be vertically sealed in the next cycle operation during execution, and the pair of heat seal units 31, After releasing the pinching of the side edge portions R1 and R2 by 32, the bag making / packaging machine 10 is stopped. That is, after the cycle operation is stopped, the control unit 16 performs a vertical sealing operation at the upper first position P1 and the second position P2 without conveying the film F.

The problem when the control unit 16 does not execute the vertical seal of the portion to be vertically sealed in the next cycle operation during execution will be described. Consider a state in which the side edge portions R1 and R2 before heat sealing are located between the pair of heat sealing units 31 and 32 when the control unit 16 stops the operation of the bag making and packaging machine 10. FIG. 10A shows a state immediately after the bag making / packaging machine 10 has stopped operating in this case. In the state shown in FIG. 10A, when the distance between the second heat seal portion 32 and the side edge portion R2 is not sufficiently secured, the side edge portions R1 and R2 before the heat seal is formed. There is a risk of deformation due to the heat of the second heat seal portion 32. For example, as shown in FIG. 10B, the side edge portions R1 and R2 may be curved by receiving radiant heat from the second heat seal portion 32. In this case, if the operation of the bag making / packaging machine 10 is restarted and the pair of heat-sealing portions 31 and 32 sandwich the curved side edge portions R1 and R2 and heat-seal, it causes a sealing failure.

When the bag-making / packaging machine 10 of the present embodiment receives the operation stop signal of the bag-making / packaging machine 10, the bag-making / packaging machine 10 performs vertical sealing of the portion to be vertically sealed in the next cycle operation during execution. Since the 10 is stopped, the occurrence of the above-mentioned sealing failure can be suppressed. Therefore, the bag-making and packaging machine 10 can suppress the occurrence of defects in the vertical seal.

(5) Modification Example A modification of the above embodiment is shown below. In addition, a part or all of the contents of each modification may be combined with the contents of other modifications to the extent that they do not contradict each other.

(5-1) Modification A
In the embodiment, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10 during the cycle operation, the control unit 16 completes the vertical sealing of the portion to be vertically sealed in the next cycle operation being executed, and the pair of heats. After releasing the pinching of the side edge portions R1 and R2 by the sealing portions 31 and 32, the bag making and packaging machine 10 is stopped.

In this modification, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10 during the cycle operation, the control unit 16 completes the vertical sealing in the running cycle operation, and the pair of heat seal units 31, 32 is used. After releasing the pinching of the side edge portions R1 and R2, the bag making / packaging machine 10 is stopped. Specifically, when the control unit 16 receives a stop signal of the bag making / packaging machine 10 during the execution of the cycle operation, the side edge portions R1 by the pair of heat seal units 31 and 32 in the execution cycle operation. After releasing the pinching of R2 and before moving the pair of heat seal portions 31, 32 to the first position P1, the bag making and packaging machine 10 is stopped.

In this modification, when the control unit 16 receives a stop signal of the bag making / packaging machine 10 before the state shown in FIGS. 7 (c) and 8 (c) in the running cycle operation, the control unit 16 is being executed. In the cycle operation of FIG. 7 (d), the bag making / packaging machine 10 is stopped in the state shown in FIGS. 7 (d) and 8 (d). 7 (c) and 8 (c) show a state when the pair of heat seal portions 31 and 32 are located at the third position P3 and the vertical seal is completed. In FIGS. 7 (d) and 8 (d), the pair of heat seal portions 31 and 32 are located at the fourth position P4, and after the completion of the vertical seal, the pair of heat seal portions 31 and 32 form the side edge portions R1 and R2. The pinch is released.

FIG. 11 is a time chart similar to that of FIG. 9, and is a time chart of the operation of the vertical seal mechanism 22 in this modification. FIG. 11 is a time chart when the control unit 16 receives a stop signal of the bag making / packaging machine 10 before the state shown in FIGS. 7 (c) and 8 (c). FIG. 11 shows the time S0 when the control unit 16 discloses the operation of the bag-making / packaging machine 10, the time S1 when the control unit 16 receives the stop signal of the bag-making / packaging machine 10, and after the bag-making / packaging machine 10 is stopped. The time S2 when the control unit 16 resumes the operation of the bag making / packaging machine 10 is shown. Unlike the embodiment, as shown in FIG. 11B, in the first cycle operation, the control unit 16 sandwiches the side edge portions R1 and R2 between the pair of heat seal portions 31 and 32 by the air cylinder to heat seal. do.

In FIG. 11, the control unit 16 moves downward with the pair of heat seal units 31 and 32 sandwiching the side edge portions R1 and R2, that is, the pair of heat seal units 31 and 32 is the first. While moving from the second position P2 to the third position P3, the stop signal of the bag making / packaging machine 10 is received at time S1. In this case, the control unit 16 completes the downward movement of the pair of heat seal units 31 and 32, and at the time t11 when the sandwiching of the side edge portions R1 and R2 by the pair of heat seal units 31 and 32 is released. , The bag making and packaging machine 10 is stopped. At time t11, the pair of heat seal portions 31, 32 are at the fourth position P4.

In FIG. 11, at the time S2 when the operation of the bag making / packaging machine 10 is restarted, the control unit 16 starts the operation of moving the pair of heat seal units 31 and 32 from the fourth position P4 to the first position P1. At the same time, the transfer of the film F by the transfer unit 33 is started. After the pair of heat seal units 31 and 32 move to the first position P1, the control unit 16 starts a normal cycle operation by the vertical seal mechanism 22.

In this modification, when the control unit 16 receives a stop signal of the bag making / packaging machine 10 after the state shown in FIGS. 7 (c) and 8 (c) in the running cycle operation, the bag making is performed. The packaging machine 10 may be stopped immediately.

Also in this modification, the control unit 16 stops the bag making / packaging machine 10 after completing the vertical sealing and releasing the sandwiching of the side edge portions R1 and R2 by the pair of heat sealing units 31 and 32, as in the embodiment. Can be made to. Therefore, the bag-making and packaging machine 10 can suppress the occurrence of defects in the vertical seal.

(5-2) Modification B
In the modification A, the first position P1 of the pair of heat seal portions 31 and 32, which is the starting point of the cycle operation, is the pair of heat seal portions 31 sandwiching the side edge portions R1 and R2 of the film F in the cycle operation. , 32 may be the positions of the longitudinal LDs of the pair of heat seal portions 31, 32 after moving them along the longitudinal LD. In this case, the first position P1 is the lowermost position in the vertical movable range of the pair of heat seal portions 31, 32. Specifically, the first position P1 of this modification corresponds to the fourth position P4 of the embodiment. FIG. 12 is a front view of the cycle operation of the pair of heat seal portions 31, 32 in this modified example.

The normal cycle operation in this modification will be described. First, as shown in FIG. 12A, the control unit 16 attaches the pair of heat seal portions 31, 32 at the first position P1 not sandwiching the side edge portions R1 and R2 of the film F to the longitudinal LD. Move upward along. As a result, as shown in FIG. 12B, the pair of heat seal portions 31 and 32 move to the uppermost position in the vertical movable range of the pair of heat seal portions 31 and 32. Next, as shown in FIG. 12 (c), the control unit 16 moves the pair of heat seal units 31 and 32 to the second position P2 sandwiching the side edge portions R1 and R2 of the film F. Next, as shown in FIG. 12D, the control unit 16 transfers the film F by the transfer unit 33 while sandwiching the side edge portions R1 and R2 between the pair of heat seal units 31 and 32 and heat-sealing them. The pair of heat seal portions 31, 32 are moved from the second position P2 to the third position P3 so as to interlock with. After that, as shown in FIG. 12A, the control unit 16 releases the sandwiching of the heat-sealed side edge portions R1 and R2 by the pair of heat-sealing units 31 and 32, and the pair of heat-sealing units 31 , 32 are moved from the third position P3 to the first position P1.

In this modification, when the control unit 16 receives the stop signal of the bag making / packaging machine 10 during the execution of the cycle operation, the side edge portions R1 by the pair of heat seal units 31 and 32 in the execution cycle operation. The bag making and packaging machine 10 can be stopped after the pinching of R2 is released and the pair of heat seal portions 31, 32 are moved to positions other than the first position P1. In this case, it is necessary that a sufficient distance between the second heat sealing portion 32 and the side edge portion R2 is secured when the bag making / packaging machine 10 is stopped.

(5-3) Modification C
In the embodiment, when the operation of the bag-making / packaging machine 10 is restarted after the bag-making / packaging machine 10 is stopped, the control unit 16 starts the transfer of the film F, and at the same time, the drive motor causes the pair of heat-sealing units 31, 32. Is moved up and down to start the cycle operation. At this time, as shown in FIG. 9, the control unit 16 moves the pair of heat seal units 31 and 32 from the first position P1 to the second position P2 by an air cylinder to sandwich the side edge portions R1 and R2. I do.

However, the control unit 16 moves the film F downward along the longitudinal LD by a predetermined distance before moving the pair of heat seal units 31 and 32 at the first position P1 to the second position P2 by the air cylinder. It may be transported. The predetermined distance is, for example, the distance at which the film F is conveyed by the conveying unit 33 in one cycle operation. In this case, in the first cycle operation after restarting the operation of the bag making / packaging machine 10, the control unit 16 performs an operation of sandwiching the side edge portions R1 and R2 between the pair of heat seal portions 31 and 32 by the air cylinder, and the side edge. Parts R1 and R2 are heat-sealed.

(5-4) Modification D
In the embodiments A to C, the bag making and packaging unit 12 forms the bag B while continuously transporting the film F supplied from the film supply unit 13. However, the bag making and packaging unit 12 may form the bag B while intermittently transporting the film F supplied from the film supply unit 13. In this case, the bag making / packaging unit 12 forms the bag B while temporarily stopping the transport of the film F at a predetermined timing.

In the continuous mode in which the film F is continuously conveyed, the bag making and packaging unit 12 seals the film F being conveyed. On the other hand, in the intermittent mode in which the film F is intermittently conveyed, the bag making / packaging unit 12 seals the stopped film F at the timing when the film F is stopped. The control unit of the bag-making / packaging machine 10 controls the bag-making / packaging unit 12 according to the operation mode. In the intermittent mode, for example, the vertical sealing mechanism 22 vertically seals the stopped film F at the timing when the transportation of the film F formed into a tubular shape is temporarily stopped. In this case, the control unit 16 does not move the vertical seal mechanism 22 in the vertical direction. Similar to the embodiment, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, the control unit 16 completes the vertical sealing of the film F by the vertical sealing mechanism 22, and the film F by the pair of heat sealing units 31 and 32. After releasing the pinching of the side edge portions R1 and R2 of the bag making / packaging machine 10, the operation of the bag making / packaging machine 10 is stopped. As a result, the bag-making and packaging machine 10 can suppress the occurrence of defects in the vertical seal, as in the embodiment.

Further, the bag making / packaging machine 10 may be configured so that the operation mode can be switched between the continuous mode and the intermittent mode. By making it possible to switch between the continuous mode and the intermittent mode, the operator of the bag making / packaging machine 10 can select an appropriate operation mode according to the situation. In this case, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, the control unit 16 completes the vertical sealing of the film F by the vertical sealing mechanism 22 according to the operation mode of the bag making / packaging machine 10, and causes a pair of heats. After releasing the pinching of the side edge portions R1 and R2 of the film F by the sealing portions 31 and 32, the operation of the bag making and packaging machine 10 is stopped.

(5-5) Modification E
In the embodiments and modifications A to D, as shown in FIGS. 7 and 8, the first heat sealing portion 31 reciprocates within a predetermined range along the vertical direction during the execution of the cycle operation of the vertical sealing mechanism 22. Then, the second heat seal portion 32 repeats the box motion by moving within a predetermined range along the left-right direction and the up-down direction. However, during the execution of the cycle operation of the vertical seal mechanism 22, both the first heat seal unit 31 and the second heat seal unit 32 may repeat the box motion. In this case, the movements of the first heat seal portion 31 and the second heat seal portion 32 are symmetrical with respect to the side edge portions R1 and R2.

(5-6) Modification F
In the embodiment, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, the control unit 16 executes the vertical sealing of the portion to be vertically sealed in the next cycle operation during execution, and then causes the bag making / packaging machine 10 to operate. By stopping it, it is possible to suppress the occurrence of sealing defects. However, the control unit 16 may suppress the occurrence of a seal defect by another method. For example, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, the control unit 16 temporarily retracts the pair of heat sealing units 31 and 32 from the film F, and then stops the operation of the bag making / packaging machine 10. You may let me. As a result, the operation of the bag making / packaging machine 10 can be stopped in a state where the side edge portions R1 and R2 of the film F are not located between the first heat seal portion 31 and the second heat seal portion 32. Therefore, the side edge portions R1 and R2 before being heat-sealed are suppressed from being deformed by the heat of the second heat-sealed portion 32, so that the occurrence of sealing failure is suppressed.

Two specific examples of the method of temporarily retracting the pair of heat seal portions 31, 32 will be described. In the first example, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, the pair of heat seal units 31 and 32 is moved forward to the side with the pair of heat seal units 31 and 32. After ensuring a sufficient distance between the edges R1 and R2 in the front-rear direction, the operation of the bag making / packaging machine 10 is stopped. As a result, deformation of the side edge portions R1 and R2 before being heat-sealed is suppressed.

In the second example, when the control unit 16 receives the operation stop signal of the bag making / packaging machine 10, a pair of heats are centered on a predetermined axis along the vertical direction located in front of the side edge portions R1 and R2. After rotating the sealing portions 31 and 32 to secure a sufficient distance between the pair of heat sealing portions 31 and 32 and the side edge portions R1 and R2, the operation of the bag making and packaging machine 10 is stopped. As a result, deformation of the side edge portions R1 and R2 before being heat-sealed is suppressed. Further, by rotating the pair of heat-sealing portions 31 and 32, the first heat-sealing portion 31 and the second heat-sealing portion 32 can be separated from each other when the operation of the bag making / packaging machine 10 is stopped. The heat seal portions 31 and 32 of the above can be easily cleaned.

10 Bag making and packaging machine 16 Control unit 22 Vertical seal mechanism 31 First heat seal unit (heat seal unit)
32 Second heat seal part (heat seal part)
33 Transport section P1 1st position P2 2nd position F Film R1 Side edges (side edges on both sides of the film)
R2 side edges (side edges on both sides of the film)
LD longitudinal direction (longitudinal direction of film)

Japanese Unexamined Patent Publication No. 2010-6387

Claims (5)

It is a bag making and packaging machine equipped with a vertical sealing mechanism that seals the side edges on both sides of the film and forms the film into a cylindrical shape.
It is equipped with a control unit that controls the bag making and packaging machine.
The vertical sealing mechanism is
A pair of heat-sealing portions that sandwich and heat-seal the side edges on both sides in a palm-to-hand state.
A transport unit that transports the film along its longitudinal direction,
Have,
The control unit is in operation of the bag making and packaging machine.
The heat seal portion in the first position where the side edge portion is not sandwiched is moved to the second position where the side edge portion is sandwiched.
After that, the heat seal portion sandwiching the side edge portion is moved along the longitudinal direction so as to be interlocked with the transport of the film by the transport portion.
After that, the sandwiching of the side edge portion by the heat seal portion is released.
After that, the cycle operation of moving the heat seal portion to the first position was repeated.
When the control unit receives a stop signal of the bag making / packaging machine during the execution of the cycle operation, the side edge is heat-sealed in the next cycle operation after the running cycle operation is terminated. The portion is sandwiched between the heat-sealed portions, and then the sandwiching of the side edge portion by the heat-sealed portion is released, and then the bag-making and packaging machine is stopped.
Bag making and packaging machine. It is a bag making and packaging machine equipped with a vertical sealing mechanism that seals the side edges on both sides of the film and forms the film into a cylindrical shape.
It is equipped with a control unit that controls the bag making and packaging machine.
The vertical sealing mechanism is
A pair of heat-sealing portions that sandwich and heat-seal the side edges on both sides in a palm-to-hand state.
A transport unit that transports the film along its longitudinal direction,
Have,
The control unit is in operation of the bag making and packaging machine.
The heat seal portion in the first position where the side edge portion is not sandwiched is moved to the second position where the side edge portion is sandwiched.
After that, the heat seal portion sandwiching the side edge portion is moved along the longitudinal direction so as to be interlocked with the transport of the film by the transport portion.
After that, the sandwiching of the side edge portion by the heat seal portion is released.
After that, the cycle operation of moving the heat seal portion to the first position was repeated.
When the control unit receives a stop signal of the bag making / packaging machine during the execution of the cycle operation, the control unit releases the pinching of the side edge portion by the heat seal portion in the execution of the cycle operation, and then causes the control unit to release the pinching of the side edge portion. Moreover, before moving the heat-sealed portion to the first position, the bag-making and packaging machine is stopped.
Bag making and packaging machine. The first position is the position in the longitudinal direction of the heat seal portion before moving the heat seal portion sandwiching the side edge portion along the longitudinal direction in the cycle operation.
The bag making and packaging machine according to claim 1. The first position is the position in the longitudinal direction of the heat seal portion after the heat seal portion sandwiching the side edge portion is moved along the longitudinal direction in the cycle operation.
The bag making and packaging machine according to claim 2. When the operation of the bag making and packaging machine is restarted after receiving the stop signal, the control unit is conveyed in one cycle operation before moving the heat seal unit to the second position. The film is conveyed along the longitudinal direction by a distance.
The bag making and packaging machine according to claim 1.

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