Device for supplying a bag

Abstract

An apparatus for supplying a bag. A film roll (5) having a tube film (51) wound thereon is supported on a lower frame (23) of a frame (2). The tube film (51) is paid out from a reel mechanism (4). A work table (3) for guiding the paid-out tube film (51) is provided on an upper portion of the apparatus. After the tube film (51) on the work table (3) is gripped by a gripping mechanism (7), the tube film (51) is pulled out to a front end side of the work table (3), and the pulled-out tube film (51) is pressed by a pressing-type cutting device (6) and cut to a prescribed length. The gripping mechanism (7) has a gripper (71) having a pair of fingers (71A) that grip the tube film (51). The gripping mechanism (7) is provided on a sliding mechanism (8) that reciprocally moves the gripper (71).

Description

Technical Field

[0001] The present invention relates to an apparatus for supplying bags, which uses a clamping mechanism to clamp a tubular film, release the tubular film from a film roll and cut it, and supply the cut bag to a packaging device. Background Technology

[0002] JP2003-285378A describes a bag supply apparatus comprising a bag manufacturing section consisting of a rotary drive for rotating a preform roll (film roll), a preform feeder, and a welding cutter, arranged sequentially. In this bag supply apparatus, the preform roll is pre-loaded into the rotary drive. The preform released from the roll passes through the rollers of the preform feeder via free rollers and is then fed to the welding cutter. A tension roller is mounted on the upper surface of the preform between the rotary drive and the free rollers.

[0003] JPH8-25523A discloses a film feed control device for a bag-making apparatus that feeds tubular film (tube film) to form bags. The film feed control device of this bag-making apparatus includes a calculation unit and a control unit. The calculation unit calculates the position of a monitoring point that determines a mark on the film. If the mark is detected, it calculates the deceleration start position and stop position to change the film feed speed; if the mark is not detected, it calculates the deceleration start position and stop position based on input data. The control unit compares a predetermined number of pulses converted from the value of the calculation unit with the actual number of pulses counted by a counting unit to control the motor drive.

[0004] In the technology of JPH8-25523A, the film feed is optimally controlled by inputting data such as the bag length and the length from the cut position to the mark on the film using an input unit. Even if the mark is not detected, the film feed is controlled based on the initial input data. Furthermore, the motor is stopped if the mark is not detected for several consecutive times, thus ensuring smooth bag making operations. Summary of the Invention

[0005] JP2003-285378A does not disclose a method for controlling the feeding of the film onto the preform roll by a rotary drive. In contrast, JPH8-25523A optimizes the feeding of the feed rollers onto the cylindrical film. However, in known technologies, the cylindrical film tends to snake during delivery, thus requiring a snake correction function. JPH8-25523A, however, does not disclose such a snake correction function.

[0006] The purpose of this invention is to provide a bag supply device that prevents the film from serpentinizing when it is pulled out of the film roll.

[0007] The device for supplying bags according to the present invention comprises:

[0008] A roll mechanism that supports the roll of membrane with the tubular membrane wound on it and releases the tubular membrane in the forward direction;

[0009] A worktable that guides the diaphragm released from the aforementioned reel mechanism;

[0010] The clamping mechanism has a clamping member for clamping the diaphragm on the worktable and pulls the diaphragm clamped by the clamping member toward the front end of the worktable.

[0011] A press-type cutting device cuts the membrane, pulled out by the clamping mechanism, to a predetermined length after pressing it down; and

[0012] The drive mechanism causes the clamping mechanism to reciprocate in the front-back direction.

[0013] The method of the present invention for controlling the device for supplying bags is as follows:

[0014] The membrane is released from the membrane roll.

[0015] After the membrane is clamped and pulled out towards the front of the worktable by the clamping mechanism, it is cut to a specified length and the resulting bag is discharged to the subsequent process. In the next process, when the clamping mechanism clamps and pulls out the membrane remaining on the worktable towards the front of the worktable again,

[0016] Detect the leading edge of the aforementioned residual tubular membrane.

[0017] When the detection result shows that the front edge of the membrane is shallower than the specified position, after releasing the clamping mechanism from the membrane, the clamping mechanism is moved to the rearward side by the shallower amount, and then the clamping mechanism is used to clamp the membrane again and pull it out to the front end of the worktable.

[0018] The device for supplying bags according to the present invention, since it clamps and pulls out the tubular film, makes the tubular film less prone to meandering and almost eliminates the need for correction of meandering. Furthermore, the control method of the device for supplying bags according to the present invention reduces handover errors of bags to the packaging machine. Attached Figure Description

[0019] Figure 1 This is a front view showing the usage state of the device for supplying bags according to Embodiment 1 of the present invention.

[0020] Figure 2 This is a top view of the device.

[0021] Figure 3 This is the right view of the device.

[0022] Figure 4 This is a partial side view of the device.

[0023] Figure 5 This is a partial top view of the device.

[0024] Figure 6A This is the front view of the membrane roll.

[0025] Figure 6B This is a top view of the vascular membrane.

[0026] Figure 7 This is a top view of the worktable in the device.

[0027] Figure 8 This is a partial top view showing the device in use.

[0028] Figure 9 This is a partial top view showing another usage state of the device.

[0029] Figure 10 This is a partial top view showing another usage state of the device.

[0030] Figure 11A This diagram shows the operating state of the press-type cutting mechanism in the device.

[0031] Figure 11B This diagram shows another usage state of the press-type cutting mechanism.

[0032] Figure 11C This diagram shows another usage state of the press-type cutting mechanism.

[0033] Figure 12 This diagram shows the sliding mechanism in the device in use.

[0034] Figure 13 This diagram shows another usage state of the sliding mechanism.

[0035] Figure 14 This is a front view of the device for supplying bags according to Embodiment 2 of the present invention.

[0036] Figure 15 yes Figure 14 A three-dimensional view of the rear side of the device.

[0037] Figure 16 yes Figure 14 A partial exploded perspective view of the device.

[0038] Figure 17 yes Figure 14 A three-dimensional view of the reel mechanism in the device.

[0039] Figure 18 yes Figure 14 A partial side view of the device.

[0040] Figure 19 yes Figure 14 A partial perspective view of the device.

[0041] Figure 20A It is shown Figure 14 A diagram showing the usage status of the device.

[0042] Figure 20B It is shown Figure 14 Another diagram showing the usage status of the device.

[0043] Figure 21 It is shown Figure 14 Another diagram showing the usage status of the device, and

[0044] Figure 22 It is used for explanation Figure 14 A diagram of the device. Detailed Implementation

[0045] [Example 1]

[0046] (Basic structure of the mechanism used to supply bags)

[0047] Figure 1 This is a front view showing the bag supply device of the present invention in use. Bags are supplied, for example, to the illustrated rotary packaging machine 11 for packaging articles. The rotary packaging machine 11 is equipped with multiple pairs of clamping arms 11A on the outer periphery of a rotating rotor 11B. Each clamping arm 11A has a clamping member at its tip for holding the side of a bag 51A cut from a tubular film 51. The chuck 12A of the bag transfer device 12 transfers the bag 51A from the bag supply device 1 to the clamping arms 11A of the rotary packaging machine 11. The rotary packaging machine 11 performs packaging operations in each section by rotating the rotor 11B. Besides rotary packaging machines, the packaging machine can also be a linear packaging machine or an elliptical packaging machine. Reference numeral 10 indicates a control box.

[0048] The device 1 for supplying bags according to the present invention includes: a roll mechanism 4 for releasing the tubular film 51 from a film roll 5 wound with the tubular film 51; a worktable 3 for guiding the tubular film 51 released from the roll mechanism 4; a clamping mechanism 7 for clamping the tubular film 51 on the worktable 3 and pulling it toward the front end of the worktable 3; and a pressing-type cutting device 6 for pressing the tubular film 51 pulled out by the clamping mechanism 7 and cutting it to a predetermined length. The device 1 for supplying bags includes a frame 2 for supporting the mechanism of the device, which is arranged on an upper frame 22 and a lower frame 23 erected between legs 21. The roll mechanism 4 is arranged on the lower frame 23, and the worktable 3, the clamping mechanism 7, and the pressing-type cutting device 6 are arranged on the upper frame 22. The detailed description of the above configuration will be explained below.

[0049] (Roller mechanism)

[0050] like Figure 1 As shown, the shaft 45 supporting the membrane roll 5 is mounted on the lower frame 23. The membrane roll 5 is formed by winding the tubular membrane 51, and a new membrane roll 5 can be placed on the shaft 45. A tension adjusting roller 41 is provided adjacent to the membrane roll 5. An air cylinder 42 is vertically connected to the lower end of the tension adjusting roller 41. By extending and retracting the piston rod of the air cylinder 42, the tension adjusting roller 41 can move up and down. Through the up and down movement of the tension adjusting roller 41, the tubular membrane 51 is released from the membrane roll 5.

[0051] Braking mechanism 44 is a pressing plate for pressing the surface of the film roll 5. It is provided to prevent the tubular film 51 from spinning excessively and becoming loose in front of the tension adjusting roller 41 when it is released by the tension adjusting roller 41. However, the braking mechanism 44 is not limited to the structure shown in the figure. Moreover, a guide roller 43 is mounted on the side of the leg column 21. The tubular film 51 is released from the film roll 5 by the tension adjusting roller 41 and guided to the worktable 3 by the guide roller 43.

[0052] (Tumor membrane)

[0053] Reference Figure 6A and Figure 6B Specifically, the tubular membrane 51 is described. The tubular membrane 51 can be formed by expanding plastic into a bag-shaped membrane or by forming a sheet-like membrane into a tubular shape, but its type is not limited. Sealing elements 54, extending in the width direction of the membrane 51, are formed at multiple positions spaced at predetermined intervals along the length of the tubular membrane 51. A perforation line 53, parallel to the sealing element 54, is provided on a side further rear of the sealing element 54 (with the feed direction of the tubular membrane 51 as the front and the opposite side as the rear). This perforation line 53 passes through... Figure 3The press-type cutting device 6 shown uses a blade 61B to cut the membrane 51. This separates the membrane 51 into individual bags 51A. Alternatively, a sharp blade can be used to cut the membrane 51 instead of a perforation line 53. However, using a dull blade 61B to cut along the perforation line 53 has the advantage of reducing the likelihood of cutting in the wrong place.

[0054] like Figure 6A and Figure 6B As shown, a mark 52 is printed on one side of the membrane 51 in the width direction, behind the perforation line 53. This mark 52 is the same as the mark described in JPH8-25523A and is used to control the feed of the membrane 51. Figure 2 A sensor 52A for detecting the mark 52 is installed on the side of the worktable 3 as shown to detect the mark 52. The control device, which is omitted from the illustration, accurately determines the feed spacing of the diaphragm 51 based on the detection result.

[0055] (Workbench)

[0056] like Figure 7 As shown, the workbench 3 generally comprises three parts. Specifically, from rear to front, the workbench 3 includes a main body 31, a middle workbench 32, and a front workbench 33. The main body 31 and the middle workbench 32 slide relative to each other. Furthermore, the middle workbench 32 and the front workbench 33 slide relative to each other, allowing the overall length of the workbench 3 to extend or retract. Between the middle workbench 32 and the front workbench 33, a [facility / feature] is provided for... Figure 1 The cutting tool 61B of the cutting mechanism 61 shown (refer to) Figure 11A The gap 34 is entered. The reason why the various parts of the worktable 3 slide in the front and back directions to change the length is to match the size of the bag 51A.

[0057] The central portion of the front side of the base plate of the workbench 3 is cut off in a rectangular shape, and the overall shape of the base plate 31 is an inverted C-shape with sharp edges when viewed from above. Cutouts 31B are formed on both sides of the opening 31A of this inverted C-shaped base plate, and the guide 9 for bag support (described later) is shown in the figure. Figure 5 The main body 31 is configured to allow for retreat using the cut 31B. The lateral width of the main body 31 is approximately the same as the lateral width of the bag supply device 1. A rectangular intermediate worktable 32 is slidably embedded in the rectangular portion of the main body 31 that has been cut off.

[0058] A front worktable 33 is provided on the front side of the intermediate worktable 32 with an opening gap 34. The gap 34 is set to a size that allows the blade 61B of the press-type cutting device 6 to enter.

[0059] The position of the gap 34 can be changed by altering the positions of the intermediate worktable 32 and the front worktable 33 along the front-back direction. The front worktable 33 includes two components: a first front small worktable 33A and a second front small worktable 33B. The first front small worktable 33A is an elongated inverted C-shape, and the thicker central portion of the E-shape of the second front small worktable 33B is slidably inserted into the opening of the first front small worktable 33A in the front-back direction. The length of the front worktable 33 can be changed by sliding the second front small worktable 33B according to the size of the bag 51A.

[0060] The lateral widths of the intermediate worktable 32 and the front worktable 33 are narrower than the lateral width of the membrane 51. This narrower lateral width of the intermediate worktable 32 and the front worktable 33 is to utilize… Figure 1 The clamping member 71 of the clamping mechanism 7 shown (refer to) Figure 10 This is used to clamp the two side edges of the diaphragm 51 that extend beyond the side edges of the two worktables 32 and 33. On both sides of the main body 31, as... Figure 1 and Figure 2 As shown, each assembly leg 24A is provided in an inverted L-shape, as... Figure 2 As shown, an assembly plate 24B is mounted between the assembly legs 24A on both sides, and a first pressing cylinder 62B, a second pressing cylinder 63B, and a cutting air cylinder 61A are mounted on the assembly plate 24B.

[0061] (Clamping mechanism and sliding mechanism)

[0062] like Figure 1 As shown, the sliding mechanism 8, equipped with the clamping mechanism 7, has a long, electrically driven actuator 81. (As shown...) Figure 5 As shown, the electric actuator 81 is fixed to the center of the upper frame 22 along its long side via a support platform 88. Figure 2 Specifically, a pair of slits 87 are provided on the upper part of the electric actuator 81 along its long side. For example... Figure 5 As shown, the electric actuator 81 has a slider 82 that moves along each slit 87, and a clamping mechanism 7 is mounted on these sliders 82. Limit sensors 84 are provided on the front end and rear end of the electric actuator 81, and an origin sensor 83 is provided on the inner side of the limit sensor 84 on the rear end, that is, at a position closer to the limit sensor 84 on the front end than the limit sensor 84 on the rear end.

[0063] like Figure 4As shown, an assembly plate 85 for mounting a pair of clamping mechanisms 7 is mounted on a pair of sliding members 82 of the electric actuator 81. Fixing parts 86 are respectively mounted at both ends of the assembly plate 85. A gearbox 72D is fixed to each fixing part 86, and the gearbox 72D houses racks 72A and 72B and a pinion 72C. Each clamping mechanism 7 includes a clamping member 71 and an opening / closing mechanism 72 for opening and closing a pair of fingers 71A of the clamping member 71. 73 is a lifting mechanism for operating the opening / closing mechanism 72. Figure 4 As shown, the clamping member 71 (referring to 71A) and the opening and closing mechanism 72 are respectively arranged on both sides of the worktable 3, and the membrane 51 on the worktable 3 is clamped from both sides in the width direction and pulled forward.

[0064] As described above, each clamping member 71 has a pair of fingers 71A, which clamp the tubular membrane 51 from the sides in the width direction. The fingers 71A are formed in a plate shape, such as... Figures 8-10 As shown, when viewed from above, it is L-shaped. On the inner side, i.e., the face of the pair of fingers 71A, anti-slip components are assembled. By forming the fingers 71A into an L-shape, the tabs in the L-shape protrude forward and horizontally support the front end of the diaphragm 51, thus preventing the fingers 71A from failing to grip.

[0065] like Figure 4 As shown, the opening and closing mechanism 72 has a first rack 72A and a second rack 72B mounted on one end of a pair of fingers 71A in the vertical direction, respectively. A pinion 72C meshes with the two racks 72A and 72B. A rod 71C for externally mounting a spring 71B extends downward from the first rack 72A, which is located on the outer side along the width direction of the device. A wheel 72E is supported at the lower end of the rod 71C and reciprocates along the length direction of the device while rotating on a horizontal lifting track 73D. Through the lifting movement of the lifting track 73D, the pair of first and second racks 72A and 72B move in opposite directions (up and down) via the wheel 72E and the rod 71C, and using the pinion 72C, thereby opening and closing the fingers 71A.

[0066] A lifting mechanism 73 for moving a pair of lifting rails 73D up and down is positioned below the electric actuator 81. The lifting mechanism 73 includes a rail lifting cylinder 73A, and a horizontally mounted [device / feature] is attached to the extension end of the piston rod of the rail lifting cylinder 73A. Figure 4 and Figure 2 The lifting frame 73B is shown. The lifting frame 73B moves smoothly up and down under the action of the sliding member 73C mounted on the frame 2. Lifting rails 73D are respectively mounted on both sides of the lifting frame 73B. As described above, the wheel 72E rotates while reciprocating on the lifting rails 73D.

[0067] (Press-type cutting mechanism)

[0068] like Figures 11A-11C As shown, the press-type cutting device 6 is positioned above the intermediate worktable 32 and the front worktable 33. The press-type cutting device 6 includes a cutting mechanism 61, a first pressing mechanism 62, and a second pressing mechanism 63. The cutting mechanism 61 has a cutting blade 61B mounted on a cutting air cylinder 61A. This cutting mechanism 61 cuts the perforation line 53 of the diaphragm 51 (see reference 33) by descending into the gap 34 between the intermediate worktable 32 and the front worktable 33. Figure 6A The cutting tool 61B is a thin plate, and as mentioned above, it does not need to be sharp, as long as it can cut through the perforated line 53. The cutting tool 61B is positioned between the first pressing mechanism 62 and the second pressing mechanism 63.

[0069] In the first pressing mechanism 62, the first pressing cylinder 62B is mounted on the rear surface of the mounting plate 24B, and the piston rod of the first pressing cylinder 62B is fitted with a first pressing plate 62A. The first pressing plate 62A is C-shaped and located above the front end of the intermediate worktable 32. In the second pressing mechanism 63, the second pressing cylinder 63B is mounted on the front surface of the mounting plate 24B, and the piston rod of the second pressing cylinder 63B is fitted with a second pressing plate 63A. The second pressing plate 63A is L-shaped and located above the rear end of the front end worktable 33.

[0070] The first pressing plate 62A of the first pressing mechanism 62 presses the diaphragm 51 on the intermediate worktable 32, and the second pressing plate 63A of the second pressing mechanism 63 presses the diaphragm 51 on the front worktable 33. The cutter 61B cuts the diaphragm 51 pressed by the first pressing mechanism 62 and the second pressing mechanism 63 at the position between the two mechanisms 62 and 63.

[0071] (Guides for bag support)

[0072] Figures 11A-11C The guide 9 for supporting the bag, as shown, supports the tubular membrane 51 on the intermediate worktable 32 when it is cut by the cutter 61B, preventing the two sides of the front end of the tubular membrane 51 from bending downwards. That is, because the lateral width of the intermediate worktable 32 is narrower than the lateral width of the tubular membrane 51, when the tubular membrane 51 is cut by the cutter 61B of the pressing-type cutting device 6, the two sides of the front end of the cut tubular membrane 51, which are not supported by the intermediate worktable 32, may droop downwards and bend. If the front end of the tubular membrane 51 droops downwards and bends, a clamping error will occur when it is clamped by the fingers 71A of the clamping mechanism 7. Figure 8 As shown, the width of the guide 9 for bag support is larger than the width of the intermediate worktable 32, so it can horizontally support both sides of the cut front end of the tubular membrane 51.

[0073] The guide 9 for bag support is T-shaped when viewed from the front, and the lower part of the T-shape is fitted to... Figures 8-10 and Figure 12 The damper shaft 92 of the damping mechanism 91 shown. The guide 9 for bag support is arranged transversely in the width direction, lower than the intermediate worktable 32, and both ends of the guide 9 for bag support protrude from the intermediate worktable 32 in the width direction. The damping mechanism 91 is supported by the support part 94 in the opening 31A in the main body 31 (see reference). Figure 7 The bottom surfaces of the components on both sides of the (). Furthermore, as... Figure 12 As shown, a spring 93 is embedded outside the damper shaft 92, and this spring 93 always applies a force forward to the guide 9 for supporting the bag. The guide 9 for supporting the bag reciprocates in the front-back direction via the contact portion 74 between the damping mechanism 91 and the clamping mechanism 7. Details of this operation will be described later.

[0074] (effect)

[0075] The function of the device 1 for supplying bags will be explained below.

[0076] like Figure 1 As shown, the film roll 5 is placed on the shaft 45 of the roll mechanism 4, and the tubular film 51 is pulled out from the film roll 5 and placed on the tension adjusting roller 41 and the guide roller 43. Then, the tubular film 51 is pulled out further and placed on the worktable 3, with the front edge of the tubular film 51 reaching the gap 34 of the worktable 3. At the same time, the front edge of the tubular film 51 is pressed by the first pressing plate 62A of the pressing-type cutting device 6. Thus, the preparation is completed. After the preparation is completed, the operation will begin by pressing the start button of the rotary packaging machine 11 and the bag supply device 1.

[0077] When the start button is pressed, the electric actuator 81 is activated, as follows: Figure 8 As shown, the clamping mechanism 7 connected to the electric actuator 81 begins to move backward in order to clamp the front end of the diaphragm 51.

[0078] Furthermore, such as Figure 9 As shown, the clamping mechanism 7 retracts and stops at the front end of the diaphragm 51.

[0079] Figure 12 This shows the state before the abutment portion 74 abuts against the damper shaft 92 of the damping mechanism 91. Figure 12 In the middle, the guide 9 for bag support supports the front two sides of the membrane tube 51 to prevent it from drooping downwards and bending. Figure 12 In this state, the finger 71A of the clamping mechanism 7 is in Figure 4 The opening and closing mechanism 72 and the lifting mechanism 73 shown are in an upward and downward opening state.

[0080] Figure 13This shows the position where the clamping mechanism 7 has retracted to both sides of the front end of the membrane 51. Figure 13 In the middle, the abutment part 74 abuts against the buffer member 95 of the guide member 9 for bag support, resisting the force of the spring 93 while pushing the damper shaft 92 and the guide member 9 for bag support backward. When the damper shaft 92 and the guide member 9 for bag support are pushed in, and the front ends of the membrane roll 5, which was originally supported by the guide member 9 for bag support, float up, the finger 71A replaces the guide member 9 for bag support to support the front ends of the tubular membrane 51. At this time, Figure 4 When the track lifting cylinder 73A of the clamping mechanism 7 shown is closed, the finger 71A closes under the action of the spring 71B of the lifting mechanism 73, clamping the front ends of the diaphragm 51 on both sides.

[0081] After the finger 71A of the clamping member 71 clamps the front end of the diaphragm 51 Figure 4 and Figure 5 The electric actuator 81, as specifically described, is activated, and the clamping mechanism 7 moves forward. When the clamping mechanism 7 moves forward, as... Figure 10 As shown, the diaphragm 51 is pulled forward. This stops the clamping mechanism 7. The rear portion of the pulled-out diaphragm 51 is... Figure 11A The state shown.

[0082] After the membrane 51 is pulled forward and stopped, as shown... Figure 11B As shown, the first pressing mechanism 62 and the second pressing mechanism 63 of the pressing-type cutting device 6 press the perforation line 53 in the diaphragm 51. Figure 11B Not shown in the image, please refer to the diagram. Figure 6A The position is towards the rear and towards the front of the perforation line 53. The pressing sequence can be that the first pressing piece 62A and the second pressing piece 63A are pressed at the same time, or the second pressing piece 63A is pressed after the first pressing piece 62A is pressed.

[0083] Subsequently, as Figure 11C As shown, the tubular membrane 51 is cut along the perforation line 53 using a tool 61B. Then, in Figure 1 The bag transfer device 12 shown has its chuck 12A clamping the front end of the bag 51A cut from the tubular membrane 51, while the fingers 71A of the clamping member 71 (see reference) Figure 4 51. Loosen the diaphragm. Afterwards, as... Figure 1 As shown, the bag transfer device 12 rotates to deliver the bag 51A to the clamping arm 11A of the rotary packaging machine 11. After this process, the state is the same as after the tube film 51 is placed, so the above process is repeated when the packaging operation of the rotary packaging machine 11 continues.

[0084] The perforation line 53 of the tubular film 51 is not necessarily precisely positioned in the section where the bag 51A is cut. Therefore, the perforation line 53 may sometimes deviate slightly in the front-back direction from directly below the cutter 61B. However, even with a slight deviation, the tubular film 51 is generally cut at the section with the weaker perforation line 53. However, if the perforation line 53 deviates rearward from directly below the cutter 61B, the fingers 71A of the clamping member 71 will clamp the tubular film 51 shallower than usual. When the clamping position by the fingers 71A is shallow, clamping errors may occur when the bag transfer device 12 delivers the bag 51A to the clamping arm 11A of the rotary packaging machine 11. Therefore, when set in… Figure 11A When the sensor (not shown) of the assembly plate 24B detects that the front end of the diaphragm 51 is positioned further back than a predetermined position, the clamping member 71 (71A) temporarily releases the clamped diaphragm 51, moves it slightly backward, and then re-clamps the diaphragm 51. Conversely, even if the clamping position is deep, the aforementioned clamping error will not occur, and therefore, the supply operation of the bag 51A will continue in this case. As the sensor, fiber optic sensors, CCD cameras, etc., can be used.

[0085] [Example 2]

[0086] Hereinafter, Embodiment 2 of the present invention will be described. Figure 14 This is a front view of the device 1 for supplying bags according to Embodiment 2. Figure 15 This is a perspective view. Embodiment 2 is essentially the same as Embodiment 1 described above. Therefore, the following description focuses on the differences from Embodiment 1. In the accompanying drawings, the same reference numerals are used for the same structure and components. The bag supply device 1 of Embodiment 2 is also a device for supplying bags to a rotary packaging machine 11 or a linear or elliptical packaging machine.

[0087] (Roller mechanism)

[0088] The device 1 for supplying bags in Embodiment 2 also includes a roll mechanism 4. In Embodiment 2, as... Figure 14 , Figure 15 and Figure 17 As shown, linear tracks 46 are respectively mounted on the lower frames 23A on both sides of the lower part of the frame 2. A sliding frame 47 is placed on the linear track 46, and the sliding frame 47 can slide in the front-back direction via the slider 46A. In this embodiment 2, a winding mechanism 4 is arranged on the sliding frame 47. The tension adjusting roller 41 of the winding mechanism 4 is located in the center of the sliding frame 47. An air cylinder 42 is mounted on the lower end of the tension adjusting roller 41, and the air cylinder 42 drives the tension adjusting roller 41 up and down. In this embodiment 2, the serpentine movement of the diaphragm 51 is suppressed by using a crown-shaped roller as the guide roller 43 at the upper part of the leg column 21.

[0089] At the rear of the sliding frame 47, a cantilever structure shaft 45 for holding the film roll 5 is horizontally mounted. The free end of the shaft 45 is supported by a C-shaped support 45A mounted on the leg column 21. At the rear end of the sliding frame 47, a rod 48 with casters is mounted. By moving the sliding frame 47 forward via the rod 48 with casters, the roll mechanism 4 can be stored inside the frame 2. When the roll mechanism 4 is stored inside the frame 2, it will not obstruct the packaging operation. The film roll 5 can be easily replaced by pulling out the sliding frame 47.

[0090] A stop 47A is provided at the front of the sliding frame 47, which limits the range of movement of the sliding frame 47. Figure 15 and Figure 17 As shown, multiple magnets 47B are fitted to the front edge of the sliding frame 47. These magnets 47B are attracted to the iron components of the frame 2, preventing the sliding frame 47 from bulging outwards from the frame 2. Although not shown, contact sensors are provided on the sliding frame 47 and the lower frame 23A to detect whether the reel mechanism 4 is properly stored within the frame. 49 indicates a mudguard, which protects the film roll 5 from mud and water splashing from the ground.

[0091] (Workbench)

[0092] like Figure 16 As shown, the workbench 3 includes three plates positioned above the upper frame 22 of the frame 2. Specifically, the workbench 3 comprises: a lower main workbench 35; a movable workbench 36 that can slide along the front-to-back direction on the main workbench 35; and an upper workbench 37 fixed to the rear of the main workbench 35 and not in contact with the movable workbench 36. The workbench 3 supports the slave... Figure 14 The membrane roll 5 shown is used to guide the tube membrane 51 pulled out.

[0093] like Figure 16 As shown, the main worktable 35 has a special shape, comprising: a roughly square base plate 35A; and a rectangular mounting section 35C, which protrudes forward from the center of the front edge of the base plate 35A. A reinforcing plate 35c (see reference) is mounted on the mounting section 35C. Figure 18 , Figure 20A , Figure 20BThe lateral width of substrate 35A is approximately the same as that of frame 2, and the length of substrate 35A is approximately one-third of the front-rear length of frame 2. Substrate 35A is fixed to the upper part of support member 35B provided at the rear of upper frame 22A of upper frame 22. On substrate 35A, long slits 351 and short slits 352, open at the front end, are formed on both sides of the mounting portion 35C toward the rear. Furthermore, side slits 353, closed at both ends, are formed on both sides of substrate 35A in the front-rear direction. The functions of these slits 351, 352, and 353 will be described later.

[0094] The front end of the mounting part 35C is fixed to the center of the portal plate 25 mounted on the front side of the upper frame 22A of the upper frame 22 of the frame 2. The support piece 25A at the upper center of the portal plate 25 is bent to the rearward side, and the front end 355 of the mounting part 35C is fixed to the support piece 25A. A long sliding slit 354 is formed on the mounting part 35C and the reinforcing plate 35c. The fixing part 66c of the cutting table 66a of the press-type cutting unit 65, described later, is assembled to the sliding slit 354 via a locking pin 66e (see reference). Figure 19 , Figure 20A , Figure 20B , Figure 22 ).

[0095] like Figure 16 As shown, the movable worktable 36 is roughly square, with a slightly upward-bent protrusion 36A protruding from the center of its front side. Figure 19 As shown, the tab 36A is not connected to the fixing part 66c of the cutting table 66a, but supports the diaphragm 51 between the movable worktable 36 and the cutting table 66a. Figure 18 and Figure 19 As shown, a damping mechanism 66b is mounted on the bottom of the movable worktable 36 via a connecting metal fitting 66m. Figure 16 and Figure 19 As shown, a long, narrow slit with an open rear end is formed in the center of the movable worktable 36, and short slits are formed on both sides of the slit. The purpose of forming these slits is to prevent the movable worktable 36 from interfering with the pin of the fixed upper worktable 37 when the movable worktable 36 slides backward while the size of the bag 51A is changed.

[0096] like Figure 16As shown, the upper worktable 37 is approximately square. On both sides of the upper worktable 37, guide rods 37A in the front-to-back direction are respectively provided to guide the diaphragm 51. The spacing between these guide rods 37A can be adjusted according to the width of the diaphragm 51. Specifically, a ball screw 37B is supported by a bearing 37C on the bottom side of the rear end of the upper worktable 37. Nuts 37D are fitted into both ends of the ball screw 37B. A handle 37E is mounted on one side of the ball screw 37B. Rotating the ball screw 37B via the handle 37E moves the nuts 37D in opposite directions, thereby changing the width-direction spacing between the guide rods 37A on both sides.

[0097] (Press-type cutting unit)

[0098] Figure 16 A press-type cutting device 6 for cutting the tubular membrane 51 is shown. This cutting device 6 differs from Embodiment 1 in that it is modular. The press-type cutting unit 65 includes: a main unit 65A, which has... Figure 22 The cutting mechanism 61, pressing mechanisms 62 and 63 are shown; and the sub-unit 66A has a cutting table 66a for placing the tubular membrane 51 to be cut (see reference). Figure 22 , Figure 16 The main unit 65A is mounted on linear tracks 35D mounted on both sides of the base plate 35A of the main worktable 35 via sliders 65a. Therefore, the main unit 65A can slide in the front-to-back direction to match the cutting position of the bag 51A when the size of the bag 51A is changed. The sub-unit 66A also slides integrally with the main unit 65A when it slides. Figure 22 The press-cut unit 65 is shown when the size of bag 51A is changed. The solid line indicates the position of the press-cut unit 65 when a longer bag 51A is required. The dashed line indicates the position of the press-cut unit 65 when a shorter bag 51A is required. Figure 22 The horizontal arrows indicate the area where the pressing-type cutting device 6 and the cutting table 66a move, thereby changing the size of the bag 51A.

[0099] like Figure 16 As shown, the main unit 65A has a pair of thick, inverted L-shaped mounting arms 65b. The main part of the main unit 65A is assembled to a mounting plate 65c that is positioned between the front ends of the pair of mounting arms 65b. The basic structure of the press-type cutting device 6 is substantially the same as that of the press-type cutting device 6 in Embodiment 1. Therefore, its detailed description is omitted. As described above, side slits 353 are formed on both sides of the substrate 35A. Figure 18As shown, bolt 356 is inserted from below into the side slit 353, and bolt 356 secures the main unit 65A to the base plate 35A. When changing the size of the bag 51A, bolt 356 is loosened, allowing the main unit 65A to slide along the side slit 353 in the front-back direction. Figure 14 , Figure 16 , Figure 22 The 65d in the text refers to a protective shield, such as... Figure 16 As shown, it is mounted on the outside of the assembly arm 65b. In addition, although not shown, protective covers are also provided in other appropriate locations for operator safety.

[0100] like Figure 16 and Figure 18 As shown, an air nozzle 65e is fitted on the inner side of the device at the front of the assembly arm 65b. This air nozzle 65e uses air ejected from it to prevent: [the air nozzle is inserted here] into the blade 61B of the press-type cutting device 6 (see reference 65b). Figure 20A , Figure 20B When the membrane 51 is cut, the front end of the cut membrane 51 is lifted by the cutter 61B due to static electricity or other reasons. If the front end of the membrane 51 is lifted, the clamping mechanism 7 will have a clamping error. Therefore, air is sprayed from the air nozzle 65e to press the front end of the membrane 51 against the cutting table 66a.

[0101] like Figure 16 As shown, a right-angled triangular bracket 65f is provided on the inner side of the assembly arm 65b, behind the air nozzle 65e. A sensor 52A for detecting markings is mounted on the lower part of this bracket 65f. The sensor 52A for detecting markings, like the sensor 52A for detecting markings in Embodiment 1, is provided to determine the feed spacing of the tubular membrane 51. However, in Embodiment 2, the sensor 52A for detecting markings is located on both sides of the device, thus enabling it to handle different types of membrane rolls 5. Furthermore, a marking detection sensor 52A is mounted behind the marking detection sensor 52A. Figure 18 and Figure 22 The membrane pressing plate 52B shown eliminates the detection error caused by the undulation of the membrane 51 on the worktable 3 by pressing the membrane 51 with the membrane pressing plate 52B.

[0102] like Figure 16 As shown, the sub-unit 66A comprises a cutting table 66a and a damping mechanism 66b, and is equipped with a movable worktable 36. Figure 20A As shown, the cutting table 66a supports the forward-feeding diaphragm 51, and utilizes... Figure 22 The cutting tool 61B of the cutting mechanism 61 shown (refer to) Figure 20AWhen cutting the membrane 51, the end of the cut membrane 51 is supported to prevent it from drooping downwards. If the front end of the membrane 51 droops after the membrane 51 is cut by the cutter 61B of the cutting mechanism 61, a clamping error will occur when the membrane 51 is clamped by the fingers 71A of the clamping mechanism 7.

[0103] like Figure 19 As shown, the cutting table 66a has a central fixed part 66c and movable parts 66d on both sides. Figure 19 and Figure 22 As shown, the fixed part 66c and the movable part 66d are constructed by merging two inverted L-shaped plates into a T-shape. Figure 19 As shown, the fixed parts 66c and movable parts 66d are provided with a gap 66n between the inverted L-shaped plates for the cutting tool 61B of the cutting mechanism 61 to enter. As described above, the upper end of the locking pin 66e engages with the back of the fixed part 66c. The lower end of the locking pin 66e inserts through the mounting part 35C and the reinforcing plate 35c (see reference). Figure 18 The aforementioned sliding mechanism is fixed to the connecting plate 66f by the slit 354 (see reference). Figure 20B , Figure 22 The connecting plate 66f is connected to the base 66g of the damping mechanism 66b. When the damping mechanism 66b is slid through the unit body 65A to change the size of the bag, the fixing part 66c will also slide by the same amount in the front-back direction via the connecting plate 66f.

[0104] The damping mechanism 66b connects the front ends of the two dampers using the base 66g. For example... Figure 20A As shown, a pair of movable parts 66d of a cutting table 66a are assembled at the front end of each damper shaft 66h. Therefore, when Figure 19 The abutment portion 74 of the clamping mechanism 7 shown is... Figure 20A When the front end of the damper shaft 66h shown abuts, the movable part 66d will retract rearward. For example... Figure 20B As shown, due to the retraction of the movable part 66d, the front end of the diaphragm 51 floats, forming a holding part L. Figure 19 After the clamping mechanism 7 shown clamps the holding part L from above and below, the clamping mechanism 7 pulls the diaphragm 51 forward.

[0105] When the finger 71A of the clamping mechanism 7 pulls the diaphragm 51 forward, the abutment part 74 of the clamping mechanism 7 will separate from the movable part 66d. This is achieved by the spring 66i (see reference) externally embedded in the damper shaft 66h. Figure 20A The movable part 66d moves to both sides of the fixed part 66c, becoming... Figure 19 The state shown. In this way, the cutting table 66a of Embodiment 2 serves the same function as the guide 9 for bag support in Embodiment 1.

[0106] like Figure 20A As shown, a detection sensor 66k is mounted at the rear end of the damper shaft 66h. This sensor 66k detects whether the damper shaft 66h has returned to its normal position under the force of the spring 66i. If the spring 66i is weak and the damper shaft 66h does not return to its normal position, the blade 61B of the pressing-type cutting device 6 may collide with the cutting table 66a, causing damage to the blade 61B. If the spring 66i is too long, its force will be weakened. Therefore, two short springs 66i are used, with the connector 66j positioned between the springs to increase the spring strength.

[0107] like Figure 18 As shown, the damping mechanism 66b is located at the lower part of the main worktable 35, but it is not engaged with the main worktable 35; instead, it is engaged with the movable worktable 36. Only in... Figure 16 For drawing purposes, the damping mechanism 66b is shown on the main worktable 35. That is, as shown... Figure 18 As shown, the base 66g of the damping mechanism 66b is connected to the bottom of the movable worktable 36 by a connecting metal fitting 66m. The connecting metal fitting 66m does not contact the mounting portion 35C or the reinforcing plate 35c. Therefore, when passing through… Figure 22 When the main unit 65A shown causes the damping mechanism 66b to slide, Figure 18 The damping mechanism 66b shown slides integrally with the movable worktable 36. When changing the size of the bag 51A, if the damping mechanism 66b slides backward, the connecting metal fitting 66m may come into contact with the base plate portion 35A of the main worktable 35 (see reference). Figure 16 If this is not done, the pressing cutting mechanism 65 cannot slide backward as required. To prevent this from happening, such as... Figure 16 As shown, a short slit 352 with the aforementioned front end side open is formed in the substrate portion 35A.

[0108] like Figure 20A , Figure 20B As shown, a slider 46A is mounted on the lower part of the base 66g of the damping mechanism 66b. The slider 46A is placed on a linear track 35f mounted on the intermediate frame 35e located below the main worktable 35. Figure 22 As shown, the damping mechanism 66b slides on the linear track 35f via the slider 46A. A rectangular protrusion 35g for placing the linear track 35f is formed at the center of the leading edge of the center frame 35e. Furthermore, a long support plate 35h is overlapped and fitted onto the upper part of the protrusion 35g, as shown... Figure 16As shown, the front end of the support plate 35h is fixed to the upper center of the portal plate 25. This support plate 35h supports the reinforcing sliding member 66p mounted at the top end of the damper shaft 66h, and bears the force applied to the cutting table 66a when the diaphragm 51 is cut on the cutting table 66a. While the protrusion 35g alone may not be sufficient to fully bear the force applied to the cutting table 66a, the support plate 35h also effectively bears this force.

[0109] As described above, in order to make the main unit 65A and the sub-unit 66A of the press-type cutting unit 65 slide together in the front-to-back direction, such as Figure 18 As shown, the assembly arm 65b of the main unit 65A and the damping mechanism 66b are connected to each other by a connecting piece 65g. The connecting piece 65g passes through a long slit 351 formed in the center of the main worktable 35 (see reference). Figure 16 The damping mechanism 66b is connected to the base 66g of the damping mechanism 66b on the lower surface of the main worktable 35. Therefore, when the main unit 65A slides forward, the damping mechanism 66b also slides forward. The long slit 351 of the main worktable 35 is formed such that the connecting piece 65g can move by such a length.

[0110] like Figure 18 As shown, an optical fiber sensor 67 is mounted on the assembly plate 65c. As described in Embodiment 1, the optical fiber sensor 67 detects the position of the front end of the tubular membrane 51 on the cutting table 66a after it has been cut by the cutter 61B of the cutting mechanism 61. As described in Embodiment 1, when the detected position is shallower than the specified position, the clamping member 71 (referring to 71A) will re-clamp the tubular membrane 51.

[0111] (Clamping mechanism and sliding mechanism)

[0112] like Figure 19 As shown, the clamping mechanism 7 is mounted on the sliding mechanism 8, which slides along the worktable 3 in the front-to-back direction. This is the same as in Embodiment 1. However, the sliding mechanism 8 does not have the slit 87 as in Embodiment 1, and the sliding member 82 with the clamping mechanism 7 is reciprocated on the electric actuator 81. This is the difference from Embodiment 1. In the assembly arm 65b (see...) Figure 14 It is equipped with an origin sensor 68 (refer to) for detecting the origin position of the sliding mechanism 8. Figure 14 and Figure 21 The origin sensor 68 is mounted on the side of the sliding mechanism 8 to detect the plate 68A (see reference). Figure 21 ) to conduct detection. Figure 21The distance d by which the clamping mechanism 7 slides is shown. This distance d is determined by the size of the bag 51A. That is, the position of the front clamping mechanism 7 remains the same, but the position of the rear clamping mechanism 7 is determined according to the size of the bag, and the mounting position of the origin sensor 68 is also changed accordingly. In addition, the lifting mechanism 73 that raises and lowers the clamping mechanism 7 (see reference) Figure 14 , Figure 19 It also has a configuration that is substantially the same as that of Example 1. Therefore, detailed descriptions are omitted as they are based on the same reference numerals.

[0113] like Figure 19 As shown, the mounting plate 85 for assembling the clamping mechanism 7 passes through the upper part of the electric actuator 81 and is fixed to the sliding member 82. Gearboxes 72D are fixed at both ends of the mounting plate 85, and the gearboxes 72D house racks 72A, 72B and pinions (not shown). The aforementioned abutment portion 74 is mounted at the rear center of the mounting plate 85. The abutment portion 74 is gate-shaped, and two shock absorbers 74A are mounted on the upper front-rear direction of the abutment portion 74. The shock absorbers 74A reduce the impact noise when the abutment portion 74 hits the movable part 66d of the damping mechanism 66b. The structure of the clamping mechanism 7 is generally the same as that of Embodiment 1. As a difference from Embodiment 1, such as Figure 19 As shown, finger 71A is F-shaped. Based on the configuration of finger 71A, the chuck 12A of the bag transfer device 12 (see reference) can be used. Figure 1 The end of the diaphragm 51 is reliably clamped. In this embodiment 2, an anti-slip element is also fitted on the inner surface side of the finger 71A.

[0114] (Other embodiments)

[0115] In embodiments 1 and 2, the finger 71A of the clamping mechanism 7 is opened and closed by the lifting and lowering of the lifting rail 73D. However, in this invention, the opening and closing of the finger 71A is not limited to this configuration. For example, the finger 71A can be opened and closed directly using an actuator (not shown). Furthermore, the sliding mechanism 8 is not limited to the electric actuator 81 described above, but can also be a combination of a motor and a ball screw.

[0116] Industrial availability

[0117] The bag supply device of the present invention can be applied to bag supply devices capable of continuously supplying packaging bags to packaging machines such as rotary packaging machines.

Claims

1. A device for supplying bags, characterized in that, have: A roll mechanism that supports the roll of membrane with the tubular membrane wound on it and releases the tubular membrane in the forward direction; A worktable that guides the diaphragm released from the aforementioned reel mechanism; The clamping mechanism has a clamping member for clamping the diaphragm on the worktable and pulls the diaphragm clamped by the clamping member toward the front end of the worktable. The press-type cutting device cuts the membrane into a specified length after pressing it down and pulling it out by the clamping mechanism. A sliding mechanism that causes the aforementioned clamping mechanism to reciprocate in the front-to-back direction; The intermediate worktable constituting the aforementioned worktable, or the movable worktable constituting the aforementioned worktable, wherein the lateral width of the intermediate worktable or the lateral width of the tabs of the movable worktable is narrower than the lateral width of the tubular membrane; and The bag support guide or the movable part of the cutting table of the aforementioned cutting device is provided on the front end side of the aforementioned intermediate worktable to support the gripping parts on both sides of the front end of the aforementioned tubular membrane that extend beyond the aforementioned intermediate worktable; or the movable part of the cutting table of the aforementioned cutting device is provided on the front end side of the aforementioned movable worktable to support the gripping parts on both sides of the front end of the aforementioned tubular membrane that extend beyond the aforementioned movable worktable's protrusion. The aforementioned clamping mechanism uses the fingers of the clamping member to clamp the front ends of the membrane being cut by the pressing-type cutting device on both sides. Furthermore, the clamping mechanism utilizes the aforementioned sliding mechanism to reciprocate between a position after the front ends of the membrane are clamped by the fingers and a position before the membrane is pulled out to a predetermined position. When the clamping mechanism retracts to the rear position where it clamps the front ends of the tubular membrane being cut by the pressing cutting device using the fingers, the guide for supporting the bag or the movable part of the cutting table of the cutting device, which previously supported the front ends of the tubular membrane, retracts rearward. The fingers, which open vertically, support the gripping parts on both sides of the front ends of the tubular membrane that extend beyond the side edges of the protrusions of the intermediate worktable or the movable worktable, and the gripping parts are clamped by the fingers and pulled forward.

2. The device for supplying bags according to claim 1, The workbench comprises: a main body; and an intermediate workbench and a front-end workbench, each with a width smaller than the width of the tubular membrane. The above-mentioned workbench has the following features: The gap is located between the middle worktable and the front worktable, allowing the cutting tool of the press-type cutting mechanism to enter. A guide for bag support, having a width greater than that of the intermediate worktable and capable of supporting the front end of the tubular membrane; and The damping mechanism supports the guide members used to support the bag. Here, The main body and the intermediate worktable can extend to each other, and the intermediate worktable and the front worktable can extend to each other as well. The guide for the bag support reciprocates in the front and back directions at the front end of the intermediate worktable using a clamping mechanism and a damping mechanism.

3. The device for supplying bags according to claim 1, The cutting table is located at the front end of the workbench to support the membrane during cutting, and to prevent the front end of the cut membrane from drooping. The aforementioned cutting table has a fixed part and a movable part. Both the fixed part and the movable part are provided with a gap along the width direction for the cutting tool of the cutting mechanism to enter. It is equipped with a damping mechanism, which is fitted with the aforementioned movable part and allows the movable part to extend and retract in the front-rear direction. When the movable part is moved backward, a gripping part for the clamping mechanism is formed at the top of the tubular membrane.

4. The apparatus for supplying bags according to claim 3, The worktable consists of a lower main worktable, a movable worktable that can slide on the main worktable in the front-back direction, and an upper worktable that does not contact the movable worktable and is fixed to the rear of the main worktable. The damping mechanism is located at the lower part of the main worktable. The fixed part of the cutting table is connected to the base of the damping mechanism, and the movable part of the cutting table is mounted on the damper shaft of the damping mechanism. When the clamping mechanism comes into contact with the damper shaft, the movable part retracts backward, and the front end of the diaphragm floats on both sides to form a gripping part.

5. The device for supplying bags according to claim 1, The clamping mechanism has a pair of fingers for clamping the diaphragm. The aforementioned clamping mechanism includes an opening and closing mechanism for opening and closing the aforementioned pair of fingers. The opening and closing mechanism of the above-mentioned clamping mechanism has the following features: A pair of racks, each fitted onto a pair of fingers; The pinion meshes with both of the aforementioned racks; A rod, one end of which is connected to one of the aforementioned pair of racks; A wheel is located at the other end of the aforementioned rod; A lifting track, which moves up and down via a lever equipped with wheels, causes the pair of racks to move in opposite directions to open and close the pair of fingers of the clamping mechanism; and The track lifting cylinder causes the aforementioned lifting track to move up and down. The aforementioned clamping mechanism is assembled on the sliding mechanism. The aforementioned rod, which is equipped with the aforementioned wheels, moves up and down and reciprocates on the lifting track, clamping the diaphragm on the worktable from both sides and pulling it forward.

6. The apparatus for supplying bags according to claim 5, The gripping mechanism has protrusions that extend forward and support the front end of the membrane.

7. The apparatus for supplying bags according to claim 1, The press-type cutting device has the following features: A cutting tool used to cut the tubular membrane; The first pressing mechanism presses the diaphragm on a side further rear of the cutter; and The second pressing mechanism presses the diaphragm on the side in front of the cutter.

8. The apparatus for supplying bags according to claim 4, It is equipped with a press-type cutting unit, which has a main unit and a sub-unit. The main unit described above includes an assembly arm that slides in the front-to-back direction on the main worktable. The assembly plate of the assembly arm includes a cutting mechanism and a cutting and pressing device equipped with the first and second pressing mechanisms. The aforementioned sub-unit includes a cutting table with both a fixed part and a movable part. The fixed and movable parts of the assembly arm, movable worktable, and cutting table are connected by the damping mechanism. When the size of the bag changes, the main unit slides in the front-back direction, the damping mechanism slides, and the fixed and movable parts of the movable worktable and cutting table all slide to match the cutting position of the bag.

9. A method for controlling an apparatus comprising the device for supplying bags as described in claim 1, characterized in that, The membrane tube is released from the membrane roll and guided onto the worktable. When the clamping mechanism retracts to a position behind the front ends of the membrane, the clamping parts on both sides of the front ends of the membrane that extend beyond the side edge of the worktable are pulled out of the membrane by the clamping mechanism towards the front end of the worktable. Then, a pressing-type cutting device cuts it to a specified length, and the resulting bag is discharged to the subsequent process. In the next process, the clamping mechanism is used to clamp the membrane remaining on the worktable due to cutting and pull it out towards the front of the worktable. Detect the leading edge of the aforementioned residual tubular membrane. When the detection result shows that the front edge of the membrane is shallower than the specified position, after releasing the clamping mechanism from the membrane, the clamping mechanism is moved to the rearward side by the shallower amount, and then the clamping mechanism is used to clamp the membrane again and pull it out to the front end of the worktable.

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