Bag-making packaging device

Abstract

To suppress the occurrence of film cut ends when connecting two films.SOLUTION: A bag-making packaging device, when switching from bag-making with a first film F1 to bag-making with a second film F2, connects a finished bag film F1E of the first film F1 and the leading edge F2T of the second film F2 to generate a first connecting film F1E / F2T using a first impulse sealer 64a. A second impulse sealer 64b connects a third portion on the starting side of the first film F1 to a fourth portion of the second film F2 to generate a second connecting film F1 / F2.SELECTED DRAWING: Figure 8B

Description

Technical Field

[0001] The present invention relates to a bag-making packaging device.

Background Art

[0002] Conventionally, in a bag-making packaging device for automatically packaging articles using a film, another film roll is set in advance separately from the film roll in use, and when the film of the film roll becomes less remaining, the start-end portion of the other film roll is automatically connected, and a technique for switching the film roll by shortening the time for stopping the device is known. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-1429) discloses a packaging device that automatically switches film rolls.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In a conventional packaging device as shown in Patent Document 1, two films are automatically connected, the connection portion is cut by a cutter, and then bag-making packaging is performed using the film fed from a new film roll.

[0004] However, when two films are connected and the connection portion is cut, the start-end portion of the new film remains as a film cut end, so it is necessary to remove this cut end by hand. This is because if the film cut end is not removed, the cut end may be caught in the film conveyance mechanism or entangled in the drive mechanism of the packaging device, which may hinder the operation of the packaging device.

[0005] An object of the present invention is to suppress the generation of a film cut end when connecting two films in a bag-making packaging device and reduce the burden on an operator such as removing the film cut end by hand.

Means for Solving the Problems

[0006] A bag making and packaging apparatus according to a first aspect includes a first holding section, a second holding section, a conveying section, a bag making and packaging section, a connecting section, and a cutting section. The first holding section holds a first film roll around which a film is wound. The second holding section holds a second film roll around which a film is wound. The conveying section conveys the film in a film conveying direction. The bag making and packaging section makes bags containing items using the film conveyed by the conveying section. The connecting section has a joint section. The joint section extends in a direction intersecting the film conveying direction. The connecting section connects the first film and the second film by the joint section at a first position and a second position. The first position and the second position are positions where the first film and the second film overlap. The first film is a film pulled out from the first film roll. The second film is a film pulled out from the second film roll. The cutting section cuts the first film and the second film at a position between the first position and the second position. In the bag making and packaging apparatus, when switching from bag making with the first film to bag making with the second film, the joining section generates a first connecting film and generates a second connecting film. Specifically, the joining section joins a first portion of the first film on the first holding section side to a second portion of the second film on the starting end side to generate a first connecting film in which the first portion and the second portion are connected. The joining section joins a third portion of the first film on the starting end side to a fourth portion of the second film on the second holding section side to generate a second connecting film in which the third portion and the fourth portion are connected.

[0007] Here, when switching from bag making with the first film to bag making with the second film, a second connecting film to be used for bag making and packaging is generated, and a second portion of the second film on the starting end side is connected to a first portion of the first film on the first holding section side to generate a first connecting film. Therefore, the second portion of the second film on the starting end side is connected to the first portion of the first film on the first holding section side without becoming a torn piece of film. As a result, in the bag making and packaging apparatus of the first aspect, the second portion of the second film on the starting end side is prevented from becoming a torn piece of film, reducing the burden on the worker of manually removing the torn pieces of film.

[0008] Note that the cutting by the cutting portions of the first film and the second film may be performed before the first film and the second film are connected, or may be performed after the first film and the second film are connected.

[0009] The bag-making and packaging apparatus according to the second aspect is the bag-making and packaging apparatus according to the first aspect, wherein the joining portion has a first sealing portion and a second sealing portion. The first sealing portion and the second sealing portion each extend in a direction intersecting the film conveyance direction. The first sealing portion and the second sealing portion are arranged at a predetermined distance from each other in the film conveyance direction. The first sealing portion connects the first film and the second film at the first position. The second sealing portion connects the first film and the second film at the second position. When switching from bag-making with the first film to bag-making with the second film, the first sealing portion connects the first portion and the second portion to generate a first connection film, and the second sealing portion connects the first portion and the second portion to generate a second connection film.

[0010] The bag-making and packaging apparatus according to the third aspect is the bag-making and packaging apparatus according to the first aspect or the second aspect, wherein the cutting portion cuts between the first portion and the third portion of the first film and between the second portion and the fourth portion of the second film.

[0011] The bag-making and packaging apparatus according to the fourth aspect is the bag-making and packaging apparatus according to the third aspect, wherein after the generation of the first connection film, the generation of the second connection film, and the cutting of the first film and the second film, the bag-making with the first film is switched to the bag-making with the second connection film, and further, the bag-making with the second connection film is switched to the bag-making with the second film.

[0012] A fifth aspect of the bag making and packaging apparatus is the bag making and packaging apparatus of any one of the first to fourth aspects, further comprising a control unit that controls the connection unit. The joining unit heat-seals the first film and the second film. The control unit changes the time for heat-sealing the first film and the second film depending on whether the contact surface of the overlapping first film and second film is the film front surface or the film back surface.

[0013] A bag making and packaging apparatus according to a sixth aspect is the bag making and packaging apparatus according to any one of the first to fifth aspects, further comprising a moving unit that moves the connection unit. When switching from bag making using the first film to bag making using the second film, the moving unit moves the connection unit.

[0014] A seventh aspect of the bag making and packaging apparatus is the bag making and packaging apparatus of the sixth aspect, further including a control unit that controls the moving unit. The control unit controls the moving unit so that the position of the connection unit when switching from bag making with the first film to bag making with the second film is different from the position of the connection unit when switching from bag making with the second film to bag making with the first film.

[0015] The bag making and packaging apparatus of an eighth aspect is the bag making and packaging apparatus of the first aspect, wherein the conveying section conveys the first film and the second film after the first film and the second film are connected by the joint at the first position and before the first film and the second film are connected by the joint at the second position.

[0016] A ninth aspect of the bag manufacturing and packaging apparatus is the eighth aspect of the bag manufacturing and packaging apparatus, wherein the cutting section cuts the first film and the second film at a position between the first position and the second position after the first film and the second film are connected by the joining section at the second position.

[0017] A bag making and packaging apparatus of a tenth aspect is the bag making and packaging apparatus of the ninth aspect, wherein the conveying section conveys the first film and the second film to align with the position at which the first film and the second film will be cut by the cutting section after the first film and the second film are connected by the joining section at the second position and before the first film and the second film are cut by the cutting section. Effect of the Invention

[0018] According to the bag-making and packaging apparatus of the present invention, the second portion on the starting end side of the second film is connected to the first portion on the first holding part side of the first film without becoming a torn piece of film. This prevents the second portion on the starting end side of the second film from becoming a torn piece of film in the bag-making and packaging apparatus of the first aspect, and reduces the burden on the worker of manually removing the torn piece of film. [Brief description of the drawings]

[0019]

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[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the following embodiment is a specific example of the present invention and does not limit the technical scope of the present invention.

[0021] (1) Overview of the weighing, bagging and packaging system A bag manufacturing and packaging apparatus 102 according to one embodiment of the present invention and a weighing, bag manufacturing and packaging system 100 including the bag manufacturing and packaging apparatus 102 will be described below with reference to the drawings.

[0022] 1 shows an external perspective view of weighing, bag-making, and packaging system 100. Weighing, bag-making, and packaging system 100 is a system made up of a weighing device 101 and a bag-making and packaging device 102. Weighing, bag-making, and packaging system 100 is configured with bag-making and packaging device 102 arranged on the lower level and weighing device 101 arranged on the upper level, and is provided on the right side with a touch panel 111 and operation switches 112 that can operate bag-making and packaging device 102 and weighing device 101 together.

[0023] The weighing device 101 is a combination weighing machine of a known configuration. The items to be packaged by the bag-making and packaging device 102 are, for example, snack foods such as potato chips, and are supplied to the upper center of the weighing device 101. The items supplied to the upper center are distributed to a plurality of radial paths, and then supplied to corresponding weighing hoppers 25 in the lower stage via a plurality of pool hoppers 24 arranged at the end of each path. The weights of the items weighed by each weighing hopper 25 are combined to select an optimal combination of weighing hoppers 25 that form an item of a certain weight. The selected weighing hopper 25 discharges the items to the collecting chute 26 based on a discharge request signal from the bag-making and packaging device 102. The discharged items are stretched in a vertical line while sliding down the collecting chute 26, and fall into the internal space of the tube 12 through the funnel member 11 of the bag-making and packaging device 102. This group of items falls into the internal space of the tube 12 as packaged items C. The bag-making and packaging apparatus 102 stores the packaged item C inside a tubular film TF, and then simultaneously transversely seals the bottom end of the tubular film TF and the top end of the preceding bag B to make a bag (see FIG. 2).

[0024] (2) Overall Structure of the Bag-Making Packaging Device The bag-making packaging device 102 is composed of a packaging unit 5 that bags the object to be packaged C, which is an article, to manufacture a product, a film supply unit 6 that supplies the film F to the packaging unit 5, and a control unit 110 (see Fig. 5) that controls the movement of the drive units of each unit 5 and 6. The film supply unit 6 is a unit that supplies the sheet-like film F to the forming mechanism 13 of the packaging unit 5 and is provided adjacent to the rear side of the packaging unit 5.

[0025] Note that the film F is the film F1 fed from the first film roll FR1 or the film F2 fed from the second film roll FR2, which will be described later. When there is no need to distinguish between them, they are simply referred to as the film F.

[0026] (2-1) Packaging Unit The packaging unit 5 is a unit that makes a bag B containing the object to be packaged C. As shown in Fig. 2, the packaging unit 5 includes a forming mechanism 13 that forms the sheet-like film F into a tubular film TF, a pull-down belt mechanism 14 that conveys the tubular film TF formed into a tube downward, a longitudinal seal mechanism 15 that longitudinally seals the overlapping portions TF-1 at both ends of the tubular film TF on the front side, and a transverse seal mechanism 17. The transverse seal mechanism 17 transversely seals the bag B formed by the tubular film TF and simultaneously heat-seals the upper end portion of the bag B and the lower end portion of the subsequent bag (tubular film TF). Further, the packaging unit 5 has a tube 12 that guides the object to be packaged C into the tubular film TF while winding the tubular film F around the outer periphery.

[0027] The forming mechanism 13 consists of a tube 12 and a former 13a arranged to surround the lower part of the tube 12. The sheet-like film F fed from the film roll FR1 or FR2 held by the film supply unit 6 is formed into a tube when passing through the gap between the former 13a and the tube 12. The upper surface of the film F becomes the inner peripheral surface of the tubular film TF, and the lower surface of the film F becomes the outer peripheral surface of the tubular film TF.

[0028] The pull-down belt mechanism 14, which has a pair of belts 14c arranged on both the left and right sides of the tube 12, is a mechanism that adsorbs and conveys downward the tubular film TF wound around the tube 12. The pull-down belt mechanism 14, together with the film supply unit 6, functions as a conveying section that conveys the film F.

[0029] The vertical sealing mechanism 15 heat-seals the overlapping portions TF-1 at both ends of the tubular film TF while pressing them with a constant pressure against the tube 12. The vertical sealing mechanism 15 is composed of a heater block and a metal belt that runs around it in sync with the tubular film TF.

[0030] The lateral sealing mechanism 17 transversely seals the tubular film TF when the packaged item C has passed through the tube 12 and fallen into the tubular film TF to form a bag B filled with the packaged item C. The lateral sealing mechanism 17 is composed of a pair of sealing jaws 51 each having a built-in heater, and a drive mechanism (not shown) that moves the pair of sealing jaws 51 toward and away from each other with respect to the tubular film TF.

[0031] (2-2) Film supply unit As shown in Figures 3, 4, 5A, and 6, the film supply unit 6 mainly includes a first holding section 81, a second holding section 82, a plurality of rollers 91a, 91b, 91c, 92a, 92b, 92c, 93a to 93o, roll drive motors 61, 62, and a film switching section 63.

[0032] (2-2-1) First holding part and second holding part The first holding part 81 is an air chuck that holds the first film roll FR1 around which the first film F1 is wound. The second holding part 82 is an air chuck that holds the second film roll FR2 around which the second film F2 is wound. The first holding part 81 and the second holding part 82 are rotated by the roll drive motors 61 and 62, respectively.

[0033] As shown in Fig. 3, the tip of the second holding portion 82 has a guide as shown in Fig. 3, which makes it easy to set the second film roll FR2 from the rear (insertion into the second holding portion 82). On the other hand, the tip of the first holding portion 81, which is located forward of the second holding portion 82, does not have a guide of the same shape as the tip of the second holding portion 82. Instead, the tip of the first holding portion 81 extends further to the left than the tip of the second holding portion 82. This makes it possible to insert the first film roll FR1 into the first holding portion 81 from the left side. In addition, the tip of the first holding portion 81 is rounded, which makes it easy to insert the first film roll FR1 and also makes it less likely that the first film roll FR1 will interfere with the second film F2 during insertion.

[0034] (2-2-2) Laura The rollers 91a, 91b, 91c, 92a, 92b, 92c, 93a to 93o are rollers that guide the film F unwound from one of the film rolls FR1 (FR2) and function as a conveying section that conveys the film F together with the roll drive motors 61, 62 and the pull-down belt mechanism 14. As shown in Fig. 6, the first film F1 unwound from the first film roll FR1 is guided by rollers 91a, 91b, 91c, and is further guided by rollers 93a and subsequent rollers. As shown in Fig. 13, the second film F2 unwound from the second film roll FR2 is guided by rollers 92a, 92b, 92c, and is further guided by rollers 93a and subsequent rollers.

[0035] (2-2-3) Film switching section The film switching unit 63 incorporates, within its case, a first impulse sealer 64a, a second impulse sealer 64b, a cutter 68, and an air cylinder 66. Both impulse sealers 64a and 64b extend in a direction intersecting the film conveyance direction A2 shown in FIG. 8B. Specifically, both impulse sealers 64a and 64b extend in the left - right direction. Also, the first impulse sealer 64a and the second impulse sealer 64b are arranged at a predetermined interval in the film conveyance direction A2. The cutter 68 is positioned between the first impulse sealer 64a and the second impulse sealer 64b in the film conveyance direction A2. Both impulse sealers 64a and 64b and the cutter 68 are integrated and are both moved by the air cylinder 66. Further, the film switching unit 63 is supported by a pair of left - right support bases 62a and 63b, and as shown in FIG. 3, it moves in the front - rear direction A1 by an air cylinder 69 different from the air cylinder 66. Specifically, the movement of the film switching unit 63 from the rear - end position shown in FIG. 6 to the front - end position shown in FIG. 7 and the movement of the film switching unit 63 from the front - end position to the rear - end position are effected by the control of the air cylinder 69 by the control unit 110.

[0036] The film supply unit 6 also includes a seal table 65a that faces both impulse sealers 64a, 64b of the film switching section 63 at the front end position across the film transport path, and a seal table 65b that faces the impulse sealers 64a, 64b of the film switching section 63 at the rear end position across the film transport path (see Figs. 6 and 7). The seal table 65a is located between the rollers 91a, 91b. The seal table 65b is located between the rollers 92b, 92c. Since the seal tables 65a, 65b have the same configuration, the seal table 65a will be taken as an example for explanation here. As shown in Fig. 8B, the seal table 65a is divided into a first section 65a1 that faces the first impulse sealer 64a at the front end position and a second section 65a2 that faces the second impulse sealer 64b at the front end position. The space between the first part 65a1 and the second part 65a2 of the sealing table 65a is a space through which the tip of the cutter 68 moves in and out. The film switching unit 63 connects and disconnects the first film F1 and the second film F2 that are stacked one above the other in the film transport path. When an instruction for connection or disconnection is received from the control unit 110, the air cylinder 66 moves, and the cutter 68 and both impulse sealers 64a and 64b move toward the sealing table 65a.

[0037] 8A, when the control unit 110 issues an instruction to extend the air cylinder 66 of the film switching unit 63 with the cutter 68 and the impulse sealers 64a, 64b in a position facing the sealing table 65a, the cutter 68 and the impulse sealers 64a, 64b press the first film F1 and the second film F2, which are stopped in an overlapping state between the rollers 91a and 91b, against the sealing table 65a. At this time, the first film F1 and the second film F2 are cut at a position midway between the rollers 91a and 91b, and immediately thereafter, the first film F1 and the second film F2 are sandwiched between the impulse sealers 64a, 64b and the sealing table 65a and heat sealed. Specifically, the first film F1 and the second film F2 are heat sealed and connected at a first position between the first impulse sealer 64a and the first section 65a1 shown in Fig. 8B, and the first film F1 and the second film F2 are heat sealed and connected at a second position between the second impulse sealer 64b and the second section 65a2. At a position between the first and second positions, the cutter 68 cuts the first film F1 and the second film F2. Here, the order is cutting first and heat sealing second, but cutting and heat sealing may be performed simultaneously, or cutting may be performed after heat sealing.

[0038] The cutting and heat sealing (connection) of the overlapping portions of the first film F1 and the second film F2 by the cutter 68 of the film switching unit 63 and both impulse sealers 64a, 64b is performed when switching from bag-making packaging using the first film F1 to bag-making packaging using the second film F2, as described below. By this cutting and heat sealing, the first impulse sealer 64a generates the first connecting films F1E-F2T, and the second impulse sealer 64b generates the second connecting films F1-F2, as shown in Fig. 8B. Specifically, the first impulse sealer 64a connects a first portion of the first film F1 on the first holding unit 81 side (bag-making completed film F1E) to a second portion of the second film F2 on the starting end side (starting end cut piece F2T) to generate the first connecting films F1E-F2T, which are films in which the first and second portions are connected. The second impulse sealer 64b joins a third portion of the first film F1 on the starting end side and a fourth portion of the second film F2 on the second holding portion 82 side to generate second connection films F1·F2, which are films in which the third and fourth portions are joined. Because the cutter 68 cuts between the first and third portions and also cuts between the third and fourth portions, the first connection films F1E·F2T and the second connection films F1·F2 become separate films.

[0039] The film switching section 63 further includes a first gripping section 71 that holds the leading end of the second film F2 and a second gripping section 72 that holds the leading end of the first film F1. The first gripping section 71 and the second gripping section 72 have the same structure, so the first gripping section 71 will be described here. The first gripping section 71 has a holding member 71a including an L-shaped member extending in the left-right direction, and a base 71b that extends in the left-right direction. The holding member 71a is manually switched between a state in which it is separated from the base 71b (see FIG. 6) and a state in which it is close to the base 71b and pressed against the base 71b by gravity (see FIG. 7). The operator lifts the holding member 71a to the state shown in FIG. 6, passes the leading end F2T of the second film F2 between the holding member 71a and the base 71b, and lowers the holding member 71a. As a result, the starting end F2T of the second film F2 is gripped by the first gripping portion 71 as shown in FIG.

[0040] (2-3) Control section The control unit 110 controls the weighing device 101 and the bag-making and packaging device 102 individually or collectively, and is realized by a computer. The control unit 110 includes a control and arithmetic device and a storage device. A processor such as a CPU or a GPU can be used for the control and arithmetic device. The control and arithmetic device reads out a program stored in the storage device, and performs predetermined image processing and arithmetic processing according to the program. Furthermore, the control and arithmetic device can write the results of the calculations to the storage device and read out information stored in the storage device according to the program.

[0041] The control unit 110 controls each drive unit of the packaging unit 5 and the film supply unit 6 according to parameters and operating conditions set on the touch panel 111 or the like. The control unit 110 also controls the feeder of the weighing device 101, the pool hopper 24, the weighing hopper 25, etc. Specifically, the control unit 110 receives necessary information from various sensors equipped on the weighing device 101 and the bag-making and packaging device 102, and performs various controls based on that information.

[0042] (4) Changing films in bag making and packaging equipment Referring to Figures 5B and 5C, the semi-automatic switching from bag-making packaging using the first film F1 of the first film roll FR1 to bag-making packaging using the second film F2 of the second film roll FR2, and the semi-automatic switching from bag-making packaging using the second film F2 of the second film roll FR2 to bag-making packaging using the first film F1 of the first film roll FR1 will be described.

[0043] (4-1) Switching from packaging using the first film to packaging using the second film When the bag making and packaging using the first film F1 of the first film roll FR1 is being performed, the second film roll FR2 is set by the worker. The second film roll FR2 is set manually by the worker. After the worker inserts the central opening of the second film roll FR2 into the second holding part 82, the worker manually pays out the starting end F2T of the second film F2 shown in FIG. 6. Then, the worker hooks the starting end F2T of the second film F2 on the roller 92a, passes it over the rollers 92b and 92c, and further brings it from the space above the rollers 91b and 91a that are conveying the first film F1 to the first gripping part 71. After that, as described above, the worker passes the starting end F2T of the second film F2 between the pressing member 71a and the base 71b, and lowers the pressing member 71a to cause the starting end F2T of the second film F2 to be gripped by the first gripping part 71.

[0044] In step S11 shown in FIG. 5B, the control unit 110 judges whether the setting of the second film roll FR2 is completed. This judgment is made depending on whether the operator who has finished setting the second film roll FR2 presses the completion button using the touch panel 111. When the setting of the second film roll FR2 is completed, the process proceeds to step S12, where the control unit 110 moves the film switching unit 63 from the rear end position shown in FIG. 6 to the front end position shown in FIG. 7. Next, in step S13, the control unit 110 judges whether the first film F1 of the first film roll FR1 is exhausted. This judgment is made depending on the detection by the encoder of the roll drive motor 61. When it is judged that the first film F1 of the first film roll FR1 is exhausted, the control unit 110 proceeds to step S14 and temporarily suspends the bag making and packaging. Specifically, the control unit 110 stops the roll drive motor 61 and the pull-down belt mechanism 14 to stop the film transport, and also stops the driving of each part of the packaging unit 5. Thereafter, the control unit 110 proceeds to step S15, where the first film F1 and the second film F2, which are stopped in an overlapping state between the rollers 91a and 91b, are cut and heat-sealed by the cutter 68 and both impulse sealers 64a and 64b. This cutting and heat-sealing is performed as shown in Figs. 8A and 8B, as described above. Thereafter, the control unit 110 proceeds to step S16, where the cutter 68 and both impulse sealers 64a and 64b are retracted by the air cylinder 66, as shown in Fig. 9, and the cutter 68 and both impulse sealers 64a and 64b are separated from the sealing table 65a. As a result, as shown in Fig. 10, the heat-sealed portion SP of the first connecting film F1E-F2T comes out of the space between the film switching unit 63 and the sealing table 65a. Moving on to step S17, when the control unit 110 resumes bag-making and packaging using the second connection films F1·F2 and the subsequent second film F2, the worker manually releases the grip of the first gripping unit 71 and removes the first film roll FR1 from which the first film F1 has been removed, from the first holding unit 81. This results in a state in which the first film roll FR1 is no longer attached to the first holding unit 81, as shown in FIG.Even in the state shown in FIG. 11, the control unit 110 continues the bag-making and packaging operation using the second film F2.

[0045] (4-2) Switching from packaging using the second film to packaging using the first film Next, the control following step S17 in FIG. 5B will be described with reference to FIG. 5C and FIGS. 11 to 16.

[0046] In step S21, the control unit 110 judges whether or not the setting of the first film roll FR1 is completed. When the worker completes the setting of the first film roll FR1 from the state shown in FIG. 11, the second film F2 being transported and the first film F1 waiting above the rollers 92b and 92c are vertically overlapped, and the starting end F1T of the first film F1 is gripped by the second gripping unit 72, as shown in FIG. 12. If it is determined that the setting of the first film roll FR1 is completed, the process proceeds to step S22, and the control unit 110 moves the film switching unit 63 from the front end position shown in FIG. 12 to the rear end position shown in FIG. 13. Next, in step S23, the control unit 110 judges whether or not there is no more second film F2 of the second film roll FR2. This judgment is made according to detection by the encoder of the roll drive motor 62. When it is determined that the second film F2 of the second film roll FR2 is exhausted, the control unit 110 proceeds to step S24 and temporarily stops the bag making and packaging. After that, the control unit 110 proceeds to step S25 and cuts and heat seals the second film F2 and the first film F1 that are stopped in an overlapping state between the roller 92ba and the roller 92c by the cutter 68 and both impulse sealers 64a and 64b (see FIG. 14). After that, the control unit 110 proceeds to step S26 and, as shown in FIG. 15, causes the cutter 68 and both impulse sealers 64a and 64b to retreat by the air cylinder 66, and separates the cutter 68 and both impulse sealers 64a and 64b from the sealing table 65b. As a result, as shown in FIG. 16, the heat sealed portion SP comes out of the space between the film switching unit 63 and the sealing table 65b. Moving on to step S27, when the control unit 110 resumes bag-making and packaging using the connecting films F2·F1 and the subsequent first film F1, the worker manually detaches and removes the second film roll FR2, from the second holding unit 82, from which the second film F2 has been removed.

[0047] (5) Features of the bag making and packaging equipment (5-1) In the bag-making and packaging apparatus 102, as described above in (2-2-3) and (4-1), when switching from bag-making and packaging with the first film F1 to bag-making and packaging with the second film F2, the second connecting films F1·F2 to be used for bag-making and packaging are generated, and a second portion of the second film F2 on the starting end side (starting end scrap F2T in FIG. 8B) is connected to a first portion of the first film F1 on the first holding section 81 side (bag-making completed film F1E in FIG. 8B) to generate first connecting films F1E·F2T. As a result, the second portion of the second film F2 on the starting end side is connected to the first portion of the first film F1 on the first holding section 81 side without becoming a scrap of the second film F2. As a result, in the bag making and packaging apparatus 102, the second portion of the second film F2 at the starting end (the starting end trimming F2T in Figure 8B) will not become a trimming of the second film F2, reducing the burden on the worker of having to manually remove the trimming of the second film F2.

[0048] This characteristic also applies when switching from making-a-bag packaging using the second film F2 to making-a-bag packaging using the first film F1.

[0049] (5-2) The bag-making and packaging apparatus 102 is equipped with an air cylinder 69 that moves the film switching unit 63, and when switching from bag-making and packaging with the first film F1 to bag-making and packaging with the second film F2, the control unit 110 moves the film switching unit 63. In addition, when switching from bag-making and packaging with the second film F2 to bag-making and packaging with the first film F1, the control unit 110 also moves the film switching unit 63. This makes it easier to manually replace the first film roll FR1 or the second film roll FR2 that has run out of film with a new one.

[0050] (5-3) In the bag-making and packaging apparatus 102, the control unit 110 controls the air cylinder 69 so that the position of the film switching unit 63 when switching from bag-making and packaging with the first film F1 to bag-making and packaging with the second film F2 differs from the position of the film switching unit 63 when switching from bag-making and packaging with the second film F2 to bag-making and packaging with the first film F1. This simplifies the task of manually replacing the first film roll FR1 or the second film roll FR2 that has run out of film with a new one.

[0051] (6) Variations (6-1) In the above embodiment, the air cylinders 66, 69 are used, but instead of these, an electric actuator such as an electric ball screw mechanism or a hydraulic actuator may be used.

[0052] Moreover, instead of the impulse sealers 64a and 64b, a heat plate sealer, an ultrasonic sealer, a high frequency sealer, or the like may be used.

[0053] (6-2) In the above embodiment, no distinction is made between the front and back sides of the first film F1 and the second film F2, but depending on the properties of the film, the sealer temperature suitable for heat sealing may differ between the front and back sides. In such a case, the control unit 110 may change the output of the impulse sealers 64a, 64b based on film information such as the winding direction (front winding, back winding) of the film F1 (F2) and whether it is for overlap or pinch sealing. This allows the impulse sealers 64a, 64b to be adjusted to an appropriate sealing temperature and sealing time.

[0054] For example, the control unit 110 changes the heat welding time between the first film F1 and the second film F2 depending on whether the contact surface of the overlapping first film F1 and second film F2 is the film front surface or the film back surface.

[0055] (6-3) In the above embodiment, after bag making and packaging is resumed with new second film F2, the worker manually releases the grip of the first gripping unit 71 and removes the first film roll FR1 from which the first film F1 has disappeared, from the first holding unit 81. At this time, it is assumed that the worker removes the first film roll FR1 without moving the first holding unit 81, so that the first connection films F1E-F2T including the second portion (starting end scrap F2T) of the second film F2 attach to the first film roll FR1 and are removed from the bag making and packaging apparatus 102.

[0056] Alternatively, the control unit 110 may automatically, or an operator may perform a specified operation to slightly rotate the first holding unit 81 using the roll drive motor 61, thereby winding up the first connection film F1E-F2T onto the first film roll FR1.

[0057] (6-4) In the above embodiment, the present invention has been described taking as an example a bag-making and packaging apparatus 102 in which the first film F1 and the second film F2 are connected by a film supply unit 6 having two impulse sealers 64a, 64b, but the specific examples of the present invention are not limited to the above embodiment. For example, a bag-making and packaging apparatus in which the first film F101 and the second film F102 are connected by a film supply unit 106 shown in Figures 17 to 22 is also a specific example of the present invention. Below, the film supply unit 106 will be described, focusing on the differences from the above film supply unit 6.

[0058] The film supply unit 106 has a first holding section that holds the first film roll FR101, a second holding section that holds the second film roll FR102, a transport section including multiple rollers 190 and a film transport mechanism, a pair of sealers 164 and a platform 165, a cutter 168, and the like. The transport section transports the first film F101 and the second film F102 in the film transport direction. The sealer 164 extends in a direction perpendicular to the film transport direction. With regard to the multiple rollers 190, those that are not necessary for the following operational description are omitted from the illustration.

[0059] As shown in FIG. 17, when the remaining amount of film in the first film roll FR101 runs out, bag making is temporarily stopped, and the first film F101 and the second film F102 are stacked vertically below the sealer 164 in a stopped state. In this state, the sealer 164 is lowered as shown in FIG. 18, and the first film F1 and the second film F2 are partially heat sealed (connected). After that, the conveying unit conveys the first film F1 and the second film F2 in the forward direction as shown in FIG. 19, and the connection point SP1 by the sealer 164 moves to the right side of the figure. In this state, as shown in FIG. 20, the sealer 164 is lowered again, and the first film F101 and the second film F102 are heat sealed. As shown in FIG. 21, the conveying unit then conveys the first film F101 and the second film F102 in the reverse direction, and this connection point SP2 moves to the left side of the space below the cutter 168 in the figure. When the conveyance unit has finished conveying the first film F101 and the second film F102 in the opposite direction, the first connection point SP1 (first position) is located to the right of the cutter 168, and the second connection point SP2 (second position) is located to the left of the cutter 168. Then, when the cutter 168 descends as shown in FIG. 22, the first film F101 and the second film F102 are cut at a position between the first connection point SP1 and the second connection point SP2. That is, the cutter 168 functioning as the cutting unit cuts the first film F101 and the second film F102 at a position between the first position and the second position. As a result, in the bag-making and packaging apparatus of this modified example, when switching from bag making using the first film F101 to bag making using the second film F102, the first connection films F101E and F102T and the second connection films F101 and F102 are produced as shown in FIG. 22. Specifically, the sealer 164 of the bag-making packaging apparatus connects a first portion F101E of the first film F101 on the first holding portion side and a second portion F102T of the second film F102 on the starting end side to generate a first connecting film F101E-F102T, which is a film in which the first portion F101E and the second portion F102T are connected.In addition, the sealer 164 of the bag-making packaging apparatus connects a third portion of the first film F101 on the starting end side and a fourth portion of the second film F102 on the second holding portion side to generate a second connecting film F101-F102, which is a film in which the third portion and the fourth portion are connected. [Explanation of symbols]

[0060] 5 Packaging unit (bag making and packaging section) 14 Pull-down belt mechanism (transport section) 61 Roll drive motor (transport section) 62 Roll drive motor (transport section) 63 Film switching section 64a First impulse sealer (first seal part; connection part; joint part) 64b Second impulse sealer (second seal part; connection part; joint part) 68 Cutter (Cutting part) 69 Air cylinder (moving part) 81 First film roll holding portion (first holding portion) 82 second film roll holding portion (second holding portion) 91a~91c Rollers (transport section) 92a~92c Rollers (transport section) 93a~93o Rollers (transport section) 100 Weighing bag packaging system 102 Bag making and packaging equipment 110 Control section 164 Sealer (Connection; Joint) 168 Cutter (Cutting part) F1, F101 1st film F2, F102 2nd film FR1, FR101 1st film roll FR2, FR102 2nd film roll F1E / F2T, F101E / F102T 1st connection film F1·F2, F101·F102 2nd connecting film [Prior art documents] [Patent documents]

[0061] [Patent Document 1] JP 2008-1429 A

Claims

1. a first holding section that holds a first film roll around which a film is wound; a second holding section that holds a second film roll around which a film is wound; a conveying section that conveys the film in a film conveying direction; a bag making and packaging unit that makes bags containing items using the film transported by the transport unit; a connection portion having a joint portion extending in a direction intersecting the film transport direction, the connection portion connecting the first film and the second film by the joint portion at a first position and a second position where the first film, which is a film pulled out from the first film roll, and the second film, which is a film pulled out from the second film roll, overlap each other; a cutting unit that cuts the first film and the second film at a position between the first position and the second position; Equipped with When switching from making a bag using the first film to making a bag using the second film, The joint is a first portion of the first film on the first holding portion side and a second portion of the second film on the starting end side are connected to generate a first connection film, which is a film in which the first portion and the second portion are connected; a third portion of the first film on the starting end side and a fourth portion of the second film on the second holding portion side are connected to generate a second connection film in which the third portion and the fourth portion are connected; Bag making and packaging equipment.

2. the joint portion has a first seal portion and a second seal portion each extending in a direction intersecting the film transport direction and disposed at a predetermined distance in the film transport direction, the first seal portion connects the first film and the second film at the first position; the second seal portion connects the first film and the second film at the second position; When switching from making a bag using the first film to making a bag using the second film, the first sealing portion connects the first portion and the second portion to generate the first connecting film; The second sealing portion connects the first portion and the second portion to generate the second connection film. The bag manufacturing and packaging apparatus according to claim 1.

3. the cutting unit cuts between the first portion and the third portion of the first film, and between the second portion and the fourth portion of the second film. The bag manufacturing and packaging apparatus according to claim 1 or 2.

4. After the first connecting film is generated, the second connecting film is generated, and the first film and the second film are cut, the bag making process is switched from the first film to the second connecting film, and further switched from the second connecting film to the second film. The bag manufacturing and packaging apparatus according to claim 3.

5. A control unit that controls the connection unit is further provided. The joining portion thermally bonds the first film and the second film, the control unit changes a time for thermal welding of the first film and the second film depending on whether a contact surface of the overlapping first film and the second film is a film front surface or a film back surface. The bag manufacturing and packaging apparatus according to claim 1 or 2.

6. Further comprising a moving unit that moves the connection unit, When switching from bag making using the first film to bag making using the second film, the moving unit moves the connection unit. The bag manufacturing and packaging apparatus according to claim 2.

7. A control unit that controls the moving unit is further provided. the control unit controls the moving unit so that a position of the connection unit when switching from bag making using the first film to bag making using the second film is different from a position of the connection unit when switching from bag making using the second film to bag making using the first film. The bag manufacturing and packaging apparatus according to claim 6.

8. the conveying section conveys the first film and the second film after the first film and the second film are connected by the joint section at the first position and before the first film and the second film are connected by the joint section at the second position. The bag manufacturing and packaging apparatus according to claim 1.

9. the cutting unit cuts the first film and the second film at a position between the first position and the second position after the first film and the second film are connected by the joining unit at the second position. The bag manufacturing and packaging apparatus according to claim 8.

10. the conveying unit conveys the first film and the second film to a position where the first film and the second film are cut by the cutting unit, after the first film and the second film are connected by the joining unit at the second position and before the first film and the second film are cut by the cutting unit; The bag manufacturing and packaging apparatus according to claim 9.

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