Bag-making packaging device

Abstract

The invention provides a bag-making packaging device which can restrain generation of residual edges of films when the two films are connected. When the bag-making packaging device is switched from bag-making based on a first film (F1) to bag-making based on a second film (F2), a first pulse sealing machine (64a) connects a bag-making completion film (F1E) in the first film (F1) and a starting end scrap (F2T) in the second film (F2) to generate a first connection film (F1E.F2T). A second pulse sealing machine (64b) connects a third portion of the first film (F1) on the starting end side and a fourth portion of the second film (F2) to generate a second connected film (F1-F2).

Description

Technical Field

[0001] The invention relates to a bag making and packaging device. Background Art

[0002] Conventionally, in a bag making and packaging device that automatically packages articles using a film, a film roll different from the film roll currently in use is pre-set, and when the remaining film portion of the film roll becomes less, the starting end portion of another film roll is automatically connected to shorten the time for stopping the device and switch the film roll. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-1429) discloses a packaging device that automatically switches film rolls.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-1429 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In the conventional packaging device disclosed in Patent Document 1, two films are automatically connected, the connected portion is cut by a cutter, and then bag making and packaging is performed using a film drawn out from a new film roll.

[0008] However, if two films are connected and the connected portion is cut, the starting end portion of the new film remains as a residual edge of the film, and the residual edge needs to be removed manually. This is because if the residual edge of the film is not removed, the residual edge will be caught in the film conveying mechanism or entangled with the driving mechanism of the packaging device, and there is a risk of hindering the operation of the packaging device.

[0009] The technical problem of the present invention is to suppress the generation of film scraps when connecting two films in a bag making and packaging device, thereby reducing the burden on workers who manually remove the film scraps.

[0010] Solutions for solving technical problems

[0011] The bag making and packaging device of the first aspect comprises a first holding part, a second holding part, a conveying part, a bag making and packaging part, a connecting part and a cutting part. The first holding part holds a first film roll wound with a film. The second holding part holds a second film roll wound with a film. The conveying part conveys the film in the film conveying direction. The bag making and packaging part makes a bag containing articles by using the film conveyed by the conveying part. The connecting part has a joining part. The joining part extends in a direction intersecting the film conveying direction. The connecting part connects the first film and the second film through the joining part 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 part 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 device, when switching from bag making based on the first film to bag making based on the second film, the joining part generates a first connecting film and generates a second connecting film. Specifically, the bonding portion connects the first portion of the first film on the first holding portion side with the second portion of the second film on the starting end side to generate a first connection film as a film connecting the first portion and the second portion. The bonding portion connects the third portion of the first film on the starting end side with the fourth portion of the second film on the second holding portion side to generate a second connection film as a film connecting the third portion and the fourth portion.

[0012] Here, when switching from bag making based on the first film to bag making based on the second film, a second connecting film for bag making and packaging is generated, and the second portion on the starting end side of the second film is connected to the first portion on the first holding portion side of the first film to generate the first connecting film. Therefore, the second portion on the starting end side of the second film does not become a residual edge of the film, but is connected to the first portion on the first holding portion side of the first film. Thus, in the bag making and packaging device of the first aspect, the second portion on the starting end side of the second film can be prevented from becoming a residual edge of the film, thereby reducing the burden on the operator who manually removes the residual edge of the film.

[0013] It should be noted that the cutting by the cutting section of the first film and the second film may be performed before the first film and the second film are connected to each other, or may be performed after the first film and the second film are connected to each other.

[0014] The bag making and packaging device of the second aspect is the bag making and packaging device of the first aspect, and the joint portion has a first sealing portion and a second sealing portion. The first sealing portion and the second sealing portion extend in a direction intersecting the film conveying direction, respectively. The first sealing portion and the second sealing portion are arranged at a predetermined distance in the film conveying direction. The first sealing portion connects the first film and the second film at a first position. The second sealing portion connects the first film and the second film at a second position. When switching from bag making based on the first film to bag making based on the second film, the first sealing portion connects the first part and the second part to generate a first connected film, and the second sealing portion connects the third part and the fourth part to generate a second connected film.

[0015] A bag making and packaging apparatus according to a third aspect is the bag making and packaging apparatus according to the first aspect or the second aspect, wherein the cutting unit cuts the first film between the first portion and the third portion and the second film between the second portion and the fourth portion.

[0016] The bag making and packaging device of the fourth aspect is the bag making and packaging device of the third aspect, which switches from bag making based on the first film to bag making based on the second connecting film, and then switches from bag making based on the second connecting film to bag making based on the second film after the first connecting film is generated, the second connecting film is generated, and the first film and the second film are cut.

[0017] The bag making and packaging device of the fifth aspect is the bag making and packaging device of any one of the first aspect to the fourth aspect, further comprising a control unit for controlling the connecting unit. The connecting unit heat-seals the first film and the second film. The control unit changes the time of heat-seal bonding the first film and the second film according to whether the contact surface of the overlapped first film and the second film is the film surface or the film back surface.

[0018] The bag making and packaging device of claim 6 is the bag making and packaging device of claim 1 or claim 5, further comprising a moving unit that moves the connecting unit. The moving unit moves the connecting unit when switching from bag making with the first film to bag making with the second film.

[0019] The bag making and packaging device of the seventh aspect is the bag making and packaging device of the sixth aspect, further comprising a control unit that controls the moving unit. The control unit controls the moving unit so that the position of the connecting portion when switching from bag making based on the first film to bag making based on the second film is different from the position of the connecting portion when switching from bag making based on the second film to bag making based on the first film.

[0020] The bag making and packaging device of the eighth aspect is the bag making and packaging device of the first aspect, wherein the conveying unit conveys the first film and the second film after the first film and the second film are connected by the joining unit at the first position and before the first film and the second film are connected by the joining unit at the second position.

[0021] A bag making and packaging apparatus according to a ninth aspect is the bag making and packaging apparatus according to the eighth aspect, 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.

[0022] The bag making and packaging device of the tenth aspect is the bag making and packaging device of the ninth aspect, wherein the conveying unit conveys the first film and the second film according to the position of cutting of the first film and the second film 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.

[0023] Effects of the Invention

[0024] According to the bag making and packaging device of the present invention, the second portion of the starting end side of the second film does not become the residual edge of the film, but is connected to the first portion of the first holding portion side of the first film. Therefore, in the bag making and packaging device of the first aspect, the second portion of the starting end side of the second film can be prevented from becoming the residual edge of the film, thereby reducing the burden on the operator who manually removes the residual edge of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an external view of the metering bag making and packaging system including the bag making and packaging device as viewed from the front right.

[0026] Figure 2 It is a schematic perspective view showing the main structure of a bag making and packaging unit of the bag making and packaging apparatus.

[0027] Figure 3 This is an external view of the film supply unit of the bag making and packaging device as seen from the rear right side.

[0028] Figure 4 It is a figure which shows the movement path of a film when the film supply unit is seen from the right side.

[0029] Figure 5A It is the control block diagram of the metering bag packaging system.

[0030] Figure 5B It is the control flow chart of film switching.

[0031] Figure 5C It is the control flow chart of film switching.

[0032] Figure 6 FIG. 1 is a diagram showing a state of the film supply unit before the second film is connected.

[0033] Figure 7 FIG. 1 is a diagram showing a state of the film supply unit before the second film is connected.

[0034] Fig. 8A It is a diagram showing a state of the film supply unit when the second film is connected.

[0035] Figure 8B yes Fig. 8A A partial enlarged view of .

[0036] Fig. 9 FIG. 1 is a diagram showing a state of the film supply unit after the second film is connected.

[0037] Fig.10 FIG. 1 is a diagram showing a state of the film supply unit after the second film is connected.

[0038] Fig.11 This is a diagram showing a state of the film supply unit in which the first film roll is unloaded.

[0039] Fig.12 It is a diagram showing a state of the film supply unit in which the first film roll is mounted.

[0040] Fig.13 FIG. 1 is a diagram showing a state of the film supply unit before the first film is connected.

[0041] Fig.14 It is a diagram showing a state of the film supply unit when the first film is connected.

[0042] Fig.15 FIG. 1 is a diagram showing a state of the film supply unit after the first film is connected.

[0043] Fig.16 This is a diagram showing a state of the film supply unit when the second film roll is unloaded.

[0044] Fig.17 FIG. 1 is a diagram showing a state of a film supply unit according to a modified example before the second film is connected.

[0045] Fig.18 It is a diagram showing a state of the film supply unit according to the modification when the second film is connected.

[0046] Fig.19 FIG. 1 is a diagram showing a state of the film supply unit according to the modified example after the second film is connected.

[0047] Fig. 20 FIG. 1 is a diagram showing a state of the film supply unit according to the modified example after the second film is connected.

[0048] Fig.21 FIG. 1 is a diagram showing a state of the film supply unit according to the modified example after the second film is connected.

[0049] Fig. 22FIG. 1 is a diagram showing a state of the film supply unit according to the modified example after the second film is connected. DETAILED DESCRIPTION

[0050] Below, while referring to the attached Figure 1 It should be noted that the following embodiment is a specific example of the present invention and does not limit the technical scope of the present invention.

[0051] (1) Overview of the metered bagging system

[0052] Hereinafter, a bag making and packaging apparatus 102 according to an embodiment of the present invention and a bag making and packaging system 100 including the bag making and packaging apparatus 102 will be described with reference to the drawings.

[0053] Figure 1 The figure shows a perspective view of the appearance of the metering bag making and packaging system 100. The metering bag making and packaging system 100 is a system composed of a metering device 101 and a bag making and packaging device 102. The metering bag making and packaging system 100 is a structure in which the bag making and packaging device 102 is arranged at the lower stage and the metering device 101 is arranged at the upper stage, and a touch panel 111 and operation switches 112 that can integrally operate the bag making and packaging device 102 and the metering device 101 are provided on the right side.

[0054] The weighing device 101 is a combination weighing machine of known structure. Articles to be packaged by the bag making and packaging device 102 are snacks such as potato chips, which are supplied to the upper center of the weighing device 101. After being dispersed into a plurality of radial paths, the articles supplied to the upper center are supplied to the corresponding weighing hoppers 25 in the lower section via a plurality of pool hoppers 24 arranged at the terminal of each path. The weights of the articles measured by each weighing hopper 25 are combined, and the weighing hopper 25 that forms the best combination of articles of a certain weight is selected. The selected weighing hopper 25 discharges the articles into the collecting chute 26 based on the discharge request signal from the bag making and packaging device 102. The discharged articles extend in a long vertical column while sliding down the collecting chute 26, and fall into the internal space of the tube 12 through the funnel part 11 of the bag making and packaging device 102. This group of articles falls into the internal space of the tube 12 as the packaged object C. After the packaged object C is placed in the tubular film TF, the bag making and packaging device 102 simultaneously transversely seals the lower end of the tubular film TF and the upper end of the preceding bag B to make the bag (see Figure 2 ).

[0055] (2) Overall structure of bag making and packaging device

[0056] The bag making and packaging device 102 is composed of a packaging unit 5 for bagging a packaged object C as an article to manufacture a product, a film supply unit 6 for supplying a film F to the packaging unit 5, and a control unit 110 (see FIG. 5 ) for controlling the operation of the drive units of the units 5 and 6. The film supply unit 6 is a unit for supplying a sheet of 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.

[0057] The film F is a film F1 drawn out from a first film roll FR1 to be described later, or a film F2 drawn out from a second film roll FR2. When there is no need to distinguish between them, they are simply referred to as film F.

[0058] (2-1) Packaging unit

[0059] The packaging unit 5 is a unit for making bags B containing the packaged objects C. Figure 2 As shown, the packaging unit 5 includes a forming mechanism 13 for forming a sheet-like film F into a tubular film TF, a pull-down belt mechanism 14 for conveying the tubular film (cylindrical film TF) downward, a longitudinal sealing mechanism 15 for longitudinally sealing the overlapping portion TF-1 at both ends of the tubular film TF on the front side, and a transverse sealing mechanism 17. The transverse sealing mechanism 17 transversely seals the bag B formed by the tubular film TF, and heat-seals the upper end portion of the bag B and the lower end portion of the subsequent bag (cylindrical film TF) at the same time. In addition, the packaging unit 5 has a tube 12 for guiding the packaged object C into the tubular film TF while winding the tubular film F around the outer circumference.

[0060] The forming mechanism 13 is composed of a tube 12 and a former 13a arranged to surround the lower part of the tube 12. The sheet-like film F drawn out from the film roll FR1 or FR2 held in the film supply unit 6 is formed into a cylindrical shape when passing through the gap between the former 13a and the tube 12, and the upper surface of the film F becomes the inner peripheral surface of the cylindrical film TF, and the lower surface of the film F becomes the outer peripheral surface of the cylindrical film TF.

[0061] The pull-down belt mechanism 14 having a pair of belts 14c disposed on both sides of the tube 12 is a mechanism for sucking the tubular film TF wound around the tube 12 and conveying it downward. The pull-down belt mechanism 14 functions as a conveying unit for conveying the film F together with the film supply unit 6 .

[0062] The longitudinal sealing mechanism 15 heats and seals the overlapping portion TF-1 at both ends of the tubular film TF while pressing it against the tube 12 with a constant pressure. The longitudinal sealing mechanism 15 is composed of a heater block and a metal belt running synchronously with the tubular film TF around the heater block.

[0063] The transverse sealing mechanism 17 transversely seals the tubular film TF when the packaged material C passes through the tube 12 and falls into the tubular film TF, thereby forming a bag B filled with the packaged material C. The transverse sealing mechanism 17 is composed of a pair of sealing jaws 51 with built-in heaters and a driving mechanism (not shown) for moving the pair of sealing jaws 51 closer to or farther from each other relative to the tubular film TF.

[0064] (2-2) Film supply unit

[0065] like Figure 3 , Figure 4 , Figure 5A , Figure 6 As shown, the film supply unit 6 mainly includes a first holding portion 81 , a second holding portion 82 , a plurality of rollers 91 a , 91 b , 91 c , 92 a , 92 b , 92 c , and 93 a to 93 o , roller drive motors 61 and 62 , and a film switching portion 63 .

[0066] (2-2-1) First holding portion and second holding portion

[0067] The first holding part 81 is an air chuck that holds the first film roll FR1 wound with the first film F1. The second holding part 82 is an air chuck that holds the second film roll FR2 wound with the second film F2. The first holding part 81 and the second holding part 82 are rotated by the roller driving motors 61 and 62, respectively.

[0068] It should be noted that if Figure 3 As shown, there is a Figure 3 The guide shown makes it easy to set the second film roll FR2 from the rear (insert it into the second holding portion 82). On the other hand, at the front end of the first holding portion 81 located on the front side of the second holding portion 82, there is no guide of the same shape as that existing at the front end of the second holding portion 82. Instead, the front end of the first holding portion 81 extends further to the left than the front end of the second holding portion 82. Therefore, the first film roll FR1 can be inserted into the first holding portion 81 from the left. In addition, the front end of the first holding portion 81 is round, so the first film roll FR1 is easy to insert and it is not easy for the first film roll FR1 to interfere with the second film F2 during insertion.

[0069] (2-2-2) Roller

[0070] The plurality of rollers 91a, 91b, 91c, 92a, 92b, 92c, 93a to 93o are rollers for guiding the film F drawn out from any film roll FR1 (FR2), and function as a conveying unit for conveying the film F together with the roller drive motors 61, 62 and the pull-down belt mechanism 14. Figure 6As shown, the first film F1 drawn out from the first film roll FR1 is guided by the rollers 91a, 91b, 91c, and further guided by the rollers after the roller 93a. Fig.13 As shown, the second film F2 drawn out from the second film roll FR2 is guided by the rollers 92a, 92b, and 92c, and further guided by the rollers after the roller 93a.

[0071] (2-2-3) Film switching unit

[0072] The film switching unit 63 has a first pulse sealer 64a and a second pulse sealer 64b, a cutter 68, and a cylinder 66 built into its housing. The two pulse sealers 64a and 64b are respectively Figure 8B The two pulse sealers 64a and 64b extend in a direction intersecting the film conveying direction A2 shown in the figure. Specifically, the two pulse sealers 64a and 64b extend in the left-right direction. In addition, the first pulse sealer 64a and the second pulse sealer 64b are arranged at a predetermined interval in the film conveying direction A2. The cutter 68 is located between the first pulse sealer 64a and the second pulse sealer 64b in the film conveying direction A2. The two pulse sealers 64a, 64b and the cutter 68 are integrated and are all moved by the cylinder 66. In addition, the film switching unit 63 is supported by a pair of left and right support tables 62a and 63b, as shown in FIG. Figure 3 As shown in FIG. 1 , the film switching unit 63 is moved in the front-rear direction A1 by a cylinder 69 different from the cylinder 66. Specifically, the film switching unit 63 is moved from Figure 6 The rear end position shown is Figure 7 The movement of the front end position shown and the movement of the membrane switching unit 63 from the front end position to the rear end position are performed by the control of the air cylinder 69 by the control unit 110 .

[0073] The film supply unit 6 includes a sealing station 65a which is opposed to the two pulse sealers 64a and 64b of the film switching unit 63 located at the front end position across the film conveying path, and a sealing station 65b which is opposed to the pulse sealers 64a and 64b of the film switching unit 63 located at the rear end position across the film conveying path (see FIG. Figure 6 and Figure 7 ). The sealing station 65a is located between the rollers 91a and 91b. The sealing station 65b is located between the rollers 92b and 92c. Since the sealing stations 65a and 65b have the same structure, the sealing station 65a is used as an example for description. Figure 8BAs shown in FIG. 1 , the sealing station 65a is divided into a first portion 65a1 opposite to the first impulse sealer 64a located at the front end position, and a second portion 65a2 opposite to the second impulse sealer 64b located at the front end position. The space between the first portion 65a1 and the second portion 65a2 of the sealing station 65a is a space for the front end of the cutter 68 to enter and exit. The film switching unit 63 connects and cuts the first film F1 and the second film F2 that overlap each other on the film conveying path. When the control unit 110 issues the connection and cut instructions, the cylinder 66 is actuated, and the cutter 68 and the two impulse sealers 64a and 64b move toward the sealing station 65a.

[0074] like Fig. 8A As shown, when the cutter 68 and the impulse sealers 64a, 64b are located opposite to the sealing table 65a, if the control unit 110 issues an extension instruction to the cylinder 66 of the film switching unit 63, the cutter 68 and the impulse sealers 64a, 64b will press the first film F1 and the second film F2 that are stopped in an overlapping state between the rollers 91a and 91b toward the sealing table 65a. At this time, the first film F1 and the second film F2 are cut at the middle position between the rollers 91a and 91b, and then, 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, Figure 8B In the first position between the first impulse sealer 64a and the first part 65a1, the first film F1 and the second film F2 are connected by heat sealing, and in the second position between the second impulse sealer 64b and the second part 65a2, the first film F1 and the second film F2 are connected by heat sealing. At the position between these first position and the second position, the cutter 68 cuts the first film F1 and the second film F2. Here, the cutting is performed first and the heat sealing is performed later, but the cutting and heat sealing may be performed at the same time, or the cutting may be performed after the heat sealing.

[0075] As will be described below, the cutting and heat sealing (connection) of the overlapping portion of the first film F1 and the second film F2 by the cutter 68 of the film switching unit 63 and the two-pulse sealers 64a, 64b is performed when switching from bag packaging based on the first film F1 to bag packaging based on the second film F2. Figure 8BAs shown, the first impulse sealer 64a generates the first connecting film F1E·F2T, and the second impulse sealer 64b generates the second connecting film F1·F2. Specifically, the first impulse sealer 64a connects the first portion (bag making end film F1E) on the first holding portion 81 side of the first film F1 with the second portion (starting end residual edge F2T) on the starting end side of the second film F2, and generates the first connecting film F1E·F2T as a film connecting the first portion and the second portion. The second impulse sealer 64b connects the third portion on the starting end side of the first film F1 with the fourth portion on the second holding portion 82 side of the second film F2, and generates the second connecting film F1·F2 as a film connecting the third portion and the fourth portion. The first portion and the third portion are cut by the cutter 68, and the third portion and the fourth portion are also cut by the cutter 68, so that the first connecting film F1E·F2T and the second connecting film F1·F2 become different films.

[0076] The film switching section 63 further includes a first gripping section 71 for pressing the starting end of the second film F2, and a second gripping section 72 for pressing the starting end of the first film F1. Since the first gripping section 71 and the second gripping section 72 have the same structure, the first gripping section 71 will be described here. The first gripping section 71 includes a pressing member 71a including an L-shaped member extending in the left-right direction, and a base 71b extending in the left-right direction. The pressing member 71a is manually switched to a state of being separated from the base 71b (see Figure 6 ), and the state where the base 71b is pressed by gravity and approaches the base 71b (refer to Figure 7 ). The operator lifts the pressing member 71a to become Figure 6 In the state shown in FIG. 1 , the starting end F2T of the second film F2 is passed between the pressing member 71a and the base 71b, and the pressing member 71a is lowered. Figure 7 The figure shows a state where the device is gripped by the first gripping portion 71 .

[0077] (2-3) Control unit

[0078] The control unit 110 controls the weighing device 101 and the bag making and packaging device 102 individually or in an integrated manner, and is implemented by a computer. The control unit 110 includes a control operation device and a storage device. The control operation device can use a processor such as a CPU or a GPU. The control operation device reads out a program stored in the storage device and performs a predetermined image processing or operation processing according to the program. Furthermore, the control operation device can write the operation result to the storage device or read out the information stored in the storage device according to the program.

[0079] The control unit 110 controls the driving units of the packaging unit 5 and the film supply unit 6 according to the parameters or operating conditions set by the touch panel 111 or the like. In addition, the control unit 110 controls the feeder, the pool hopper 24, the weighing hopper 25, etc. of the weighing device 101. Specifically, the control unit 110 reads necessary information from various sensors equipped in the weighing device 101 and the bag making and packaging device 102, and performs various controls based on the information.

[0080] (4) Film switching in bag making and packaging equipment

[0081] Reference Figure 5B and Figure 5C , the semi-automatic switching from bag packaging using the first film F1 of the first film roll FR1 to bag packaging using the second film F2 of the second film roll FR2, and the semi-automatic switching from bag packaging using the second film F2 of the second film roll FR2 to bag packaging using the first film F1 of the first film roll FR1 are explained.

[0082] (4-1) Switching from bag packaging based on the first film to bag packaging based on the second film

[0083] When bagging the first film F1 using the first film roll FR1, the operator sets the second film roll FR2. The operator manually sets the second film roll FR2. After inserting the central opening of the second film roll FR2 into the second holding portion 82, the operator manually pulls out the second film roll FR2. Figure 6 Then, the operator hangs the starting end F2T of the second film F2 on the roller 92a, passes it over the rollers 92b and 92c, and then brings the first film F1 from the space above the rollers 91b and 91a being transported to the first gripping section 71. Then, as described above, the operator 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, so that the first gripping section 71 grips the starting end F2T of the second film F2.

[0084] The control unit 110 Figure 5B In step S11 shown in FIG. 1 , it is determined whether the installation of the second film roll FR2 is completed. This determination is made based on whether the operator who has completed the installation of the second film roll FR2 has pressed the completion button using the touch panel 111. If the installation of the second film roll FR2 is completed, the process proceeds to step S12, and the control unit 110 causes the film switching unit 63 to switch from Figure 6 The rear end position shown is Figure 7The front end position is moved to the position shown. Next, the control unit 110 determines in step S13 whether the remaining portion of the first film F1 of the first film roll FR1 is exhausted. This determination is performed based on the detection performed by the encoder of the roller drive motor 61. If it is determined that the remaining portion of the first film F1 of the first film roll FR1 is exhausted, the control unit 110 moves to step S14 to temporarily stop the bag making and packaging. Specifically, the control unit 110 stops the film conveyance by stopping the roller drive motor 61 and the lower pull belt mechanism 14, and also stops the driving of each part of the packaging unit 5. Then, the control unit 110 moves to step S15, and the first film F1 and the second film F2 stopped in an overlapping state between the roller 91a and the roller 91b are cut and heat-sealed by the cutter 68 and the two-pulse sealers 64a and 64b. Regarding the cutting and heat sealing, as described above, Fig. 8A , Figure 8B Then, the control unit 110 moves to step S16, as shown in Fig. 9 As shown, the cutter 68 and the two-pulse sealers 64a, 64b are retracted by the cylinder 66, so that the cutter 68 and the two-pulse sealers 64a, 64b are separated from the sealing station 65a. Fig.10 As shown, the heat-sealed portion SP of the first connecting film F1E·F2T is separated from the space between the film switching unit 63 and the sealing platform 65a. Moving to step S17, if the control unit 110 starts bagging and packaging again using the second connecting film F1·F2 and the subsequent second film F2, the operator manually releases the grip of the first gripping unit 71, removes the first film roll FR1 that has been used up with the first film F1 from the first holding unit 81, and dismantles it. Fig.11 As shown in FIG. 1 , the first film roll FR1 is not mounted on the first holding portion 81. Fig.11 In the state shown, the control unit 110 also continues the bag making and packaging operation using the second film F2.

[0085] (4-2) Switching from bag packaging based on the second film to bag packaging based on the first film

[0086] Next, refer to Figure 5C and Figure 11~Figure 16 , followed by Figure 5B The control of step S17 will be described.

[0087] The control unit 110 determines in step S21 whether the installation of the first film roll FR1 has been completed. Fig.11 The state shown in FIG. 1 is completed by setting the first film roll FR1. Fig.12As shown in FIG. 1 , the second film F2 being transported above the rollers 92b and 92c overlaps the first film F1 on standby, and the leading end F1T of the first film F1 is held by the second holding portion 72. If it is determined that the setting of the first film roll FR1 is completed, the process moves to step S22, and the control unit 110 causes the film switching unit 63 to switch from Fig.12 The front position shown is Fig.13 The rear end position shown is moved. Next, the control unit 110 determines in step S23 whether the remaining portion of the second film F2 of the second film roll FR2 is exhausted. This determination is performed based on the detection performed by the encoder of the roller drive motor 62. If it is determined that the remaining portion of the second film F2 of the second film roll FR2 is exhausted, the control unit 110 moves to step S24 to temporarily stop the bag making and packaging. Then, the control unit 110 moves to step S25, and the second film F2 (bag making end film F2E) and the first film F1 that are stopped in an overlapping state between the roller 92b and the roller 92c are cut and heat-sealed by the cutter 68 and the two-pulse sealers 64a and 64b (refer to Fig.14 Then, the control unit 110 moves to step S26. Fig.15 As shown, the cutter 68 and the two-pulse sealers 64a, 64b are retracted by the cylinder 66, so that the cutter 68 and the two-pulse sealers 64a, 64b are separated from the sealing table 65b. Fig.16 As shown, the heat-sealed portion SP is separated from the space between the film switching unit 63 and the sealing platform 65b. Moving to step S27, if the control unit 110 starts bag making and packaging again by connecting the film F2·F1 and the subsequent first film F1, the operator manually removes the second film roll FR2 that has run out of the second film F2 from the second holding unit 8 and removes it.

[0088] (5) Characteristics of bag making and packaging equipment

[0089] (5-1)

[0090] In the bag making and packaging device 102, as described in (2-2-3) and (4-1) above, when switching from bag making and packaging based on the first film F1 to bag making and packaging based on the second film F2, the second connecting film F1 and F2 for bag making and packaging are generated, and the second portion ( Figure 8B The starting end residual edge F2T) and the first portion of the first film F1 on the first holding portion 81 side ( Figure 8BThe second portion of the second film F2 on the starting end side does not become the residual edge of the second film F2, but is connected to the first portion of the first holding portion 81 side of the first film F1. As a result, in the bag making and packaging device 102, the second portion of the second film F2 on the starting end side ( Figure 8B The starting end residual edge F2T) will not become the residual edge of the second film F2, which can reduce the burden on operators who manually remove the residual edge of the second film F2.

[0091] This feature is also the same when switching from bag-making and packaging using the second film F2 to bag-making and packaging using the first film F1.

[0092] (5-2)

[0093] The bag making and packaging device 102 is provided with an air cylinder 69 for moving the film switching unit 63. When switching from bag making and packaging based on the first film F1 to bag making and packaging based on the second film F2, the control unit 110 moves the film switching unit 63. In addition, when switching from bag making and packaging based on the second film F2 to bag making and packaging based on the first film F1, the control unit 110 also moves the film switching unit 63. This makes it easy to manually replace the first film roll FR1 or the second film roll FR2 that has run out of film with a new film roll.

[0094] (5-3)

[0095] In the bag making and packaging device 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 based on the first film F1 to bag making and packaging based on the second film F2 is different from the position of the film switching unit 63 when switching from bag making and packaging based on the second film F2 to bag making and packaging based on the first film F1. 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 film roll.

[0096] (6) Modification

[0097] (6-1)

[0098] In the above-described embodiment, the air cylinders 66 and 69 are used, but an electric actuator such as an electric ball screw mechanism or a hydraulic actuator may be used instead.

[0099] In addition, other sealing machines such as a hot plate sealing machine, an ultrasonic sealing machine, and a high-frequency sealing machine may be used instead of the impulse sealing machines 64a and 64b.

[0100] (6-2)

[0101] In the above-mentioned embodiment, although the front and back sides of the first film F1 or the second film F2 are not distinguished, the temperature of the sealer suitable for heat sealing may be different on the front and back sides depending on the properties of the film. In this case, the control unit 110 may change the output of the impulse sealer 64a, 64b based on the film information such as the winding direction (forward winding, reverse winding) of the film F1 (F2), whether it is for covering or shrink sealing, etc. Thus, the impulse sealer 64a, 64b is adjusted to an appropriate sealing temperature and an appropriate sealing time.

[0102] For example, the control unit 110 changes the heat-sealing time of the first film F1 and the second film F2 depending on whether the contact surface of the overlapped first film F1 and the second film F2 is the film front surface or the film back surface.

[0103] (6-3)

[0104] In the above-mentioned embodiment, after the bag making and packaging is started again using the new second film F2, the operator manually releases the grip of the first gripping portion 71, and removes and dismantles the first film roll FR1 that has been used up with the first film F1 from the first holding portion 81. At this time, it is assumed that the first film roll FR1 is disassembled by the operator without moving the first holding portion 81, so that the first connecting film F1E·F2T including the second portion (starting end residual edge F2T) on the starting end side of the second film F2 adheres to the first film roll FR1 and falls off from the bag making and packaging device 102.

[0105] Alternatively, the control unit 110 may slightly rotate the first holding unit 81 by the roller drive motor 61 automatically or by a predetermined operation by an operator to wind the first connecting film F1E·F2T around the first film roll FR1 .

[0106] (6-4)

[0107] In the above embodiment, the present invention is described by taking the bag making and packaging device 102 in which the first film F1 and the second film F2 are connected by the film supply unit 6 having two impulse sealers 64a and 64b as an example, but the specific example of the present invention is not limited to the above embodiment. Figures 17 to 22 The bag making and packaging apparatus in which the film supply unit 106 shown connects the first film F101 and the second film F102 is also a specific example of the present invention. The film supply unit 106 will be described below, focusing on the parts different from the above-mentioned film supply unit 6.

[0108] The film supply unit 106 includes a first holding portion for holding the first film roll FR101, a second holding portion for holding the second film roll FR102, a conveying portion including a plurality of rollers 190 and a film conveying mechanism, a pair of sealers 164 and a table 165, a cutter 168, etc. The conveying portion conveys the first film F101 or the second film F102 in the film conveying direction. The sealer 164 extends in a direction orthogonal to the film conveying direction. With respect to the plurality of rollers 190, components that are not necessary in the following description of the operation are omitted from the illustration.

[0109] like Fig.17 As shown, if the remaining film of the first film roll FR101 is exhausted, the bag making is temporarily stopped, and the first film F101 and the second film F102 are overlapped up and down in the stopped state below the sealing machine 164. In this state, as shown in FIG. Fig.18 As shown, the sealing machine 164 descends, and the first film F1 and the second film F2 are partially heat-sealed (connected). Fig.19 As shown in FIG. 1 , the conveying unit conveys the first film F1 and the second film F2 forward, and the connection point SP1 of the sealing machine 164 moves to the right side in the figure. Fig. 20 As shown, the sealing machine 164 descends again, and the first film F101 and the second film F102 are heat-sealed. Fig.21 As shown in FIG. 1 , the first film F101 and the second film F102 are then transported in the opposite direction by the transport unit, and the connection point SP2 moves to the left side of the space below the cutter 168 in the figure. When the transport of the first film F101 and the second film F102 in the opposite direction by the transport unit is completed, the first connection point SP1 (first position) is located on the right side of the cutter 168, and the second connection point SP2 (second position) is located on the left side of the cutter 168. Then, as shown in FIG. Fig. 22 As shown in FIG. 1 , when the cutter 168 descends, 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, which functions as a cutting unit, cuts the first film F101 and the second film F102 at a position between the first position and the second position. Thus, in the bag making and packaging device of this modified example, when switching from bag making based on the first film F101 to bag making based on the second film F102, as shown in FIG. Fig. 22As shown, a first connecting film F101E·F102T is generated, and a second connecting film F101·F102 is generated. Specifically, the sealing machine 164 of the bag making and packaging device connects the first portion (bag making end film) F101E on the first holding portion side of the first film F101 with the second portion (starting end residual edge) F102T on the starting end side of the second film F102, and generates the first connecting film F101E·F102T as a film connecting the first portion F101E and the second portion F102T. In addition, the sealing machine 164 of the bag making and packaging device connects the third portion on the starting end side of the first film F101 with the fourth portion on the second holding portion side of the second film F102, and generates the second connecting film F101·F102 as a film connecting the third portion and the fourth portion.

[0110] Description of Reference Numerals

[0111] 5 Packaging unit (bag making and packaging department)

[0112] 14 Pull-down belt mechanism (conveying unit)

[0113] 61 Roller drive motor (conveying unit)

[0114] 62 Roller drive motor (conveying unit)

[0115] 63 Film switching unit

[0116] 64a First impulse sealer (first sealing part; connecting part; joining part)

[0117] 64b Second impulse sealer (second sealing part; connecting part; joining part)

[0118] 68 Cutter (cutting part)

[0119] 69 Cylinder (moving part)

[0120] 81 First film roll holding portion (first holding portion)

[0121] 82 Second film roll holding portion (second holding portion)

[0122] 91a~91c Roller (conveying part)

[0123] 92a~92c Roller (conveying part)

[0124] 93a~93o Roller (conveying part)

[0125] 100 Metering bag packaging system

[0126] 102 Bag making and packaging device

[0127] 110 Control Department

[0128] 164 Sealing machine (connecting part; joint part)

[0129] 168 Cutter (cutting part)

[0130] F1, F101 First Film

[0131] F2, F102 Second film

[0132] FR1, FR101 first film roll

[0133] FR2, FR102 Second Film Roll

[0134] F1E·F2T, F101E·F102T First connection film

[0135] F1·F2, F101·F102 Second connecting film.

Claims

1. A bag making and packaging device, comprising: A first holding portion holds a first film roll wound with a film; A second holding portion holds a second film roll wound with a film; A conveying section, conveying the film in a film conveying direction; a bag-making and packaging unit for making bags containing articles by using the film conveyed by the conveying unit; a connecting portion having a joining portion extending in a direction intersecting the film conveying direction, wherein the first film and the second film are connected by the joining portion at a first position and a second position where a first film drawn out from the first film roll overlaps with a second film drawn out from the second film roll; and a cutting unit that cuts the first film and the second film at a position between the first position and the second position, When switching from bag making based on the first film to bag making based on the second film, The joining portion connects a first portion of the first film on the first holding portion side with a second portion of the second film on the starting end side to generate a first connecting film as a film connecting the first portion and the second portion. The bonding portion connects a third portion on the starting end side of the first film and a fourth portion on the second holding portion side of the second film to generate a second connected film as a film connecting the third portion and the fourth portion.

2. The bag making and packaging device according to claim 1, The bonding portion includes a first sealing portion and a second sealing portion, each extending in a direction intersecting the film conveying direction and arranged at a predetermined distance in the film conveying 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 based on the first film to bag making based on the second film, The first sealing portion connects the first portion and the second portion to form the first connecting film. The second sealing portion connects the third portion and the fourth portion to form the second connection film.

3. The bag making and packaging device according to claim 1 or 2, 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.

4. The bag making and packaging device according to claim 3, After the generation of the first connecting film, the generation of the second connecting film, and the cutting of the first film and the second film, the bag making based on the first film is switched to the bag making based on the second connecting film, and then the bag making based on the second connecting film is switched to the bag making based on the second film.

5. The bag making and packaging device according to claim 1 or 2, The bag making and packaging device further includes a control unit that controls the connecting unit. The bonding portion thermally welds the first film and the second film. The control unit changes the time of heat-sealing the first film and the second film according to whether the contact surface of the overlapped first film and the second film is the film front surface or the film back surface.

6. The bag making and packaging device according to claim 2, The bag making and packaging device further comprises a moving part for moving the connecting part. The moving section moves the connecting section when switching from bag making using the first film to bag making using the second film.

7. The bag making and packaging device according to claim 6, The bag making and packaging device further includes a control unit that controls the moving unit. The control unit controls the moving unit so that the position of the connecting portion when switching from bag making with the first film to bag making with the second film is different from the position of the connecting portion when switching from bag making with the second film to bag making with the first film.

8. The bag making and packaging device according to claim 1, The transport unit transports the first film and the second film after the first film and the second film are connected by the bonding unit at the first position and before the first film and the second film are connected by the bonding unit at the second position.

9. The bag making and packaging device according to claim 8, 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 bonding unit at the second position.

10. The bag making and packaging device according to claim 9, The conveying unit conveys the first film and the second film according to a position at which 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.

Images