Zipper Feeding Device

Abstract

To provide a zipper supply device capable of saving space by shortening the overall length. [Solution] The zipper supply device 9 includes a rotatable zipper reel around which zipper tape T is wound, an end welding device that compresses and welds the zipper tape T at positions that will become ends of zipper segments Z to form compressed sections Zc, a cutting device that cuts the zipper tape T to form zipper segments Z, and a direction changing unit 20 that changes the payout direction of the zipper tape T between the zipper reel and the cutting device. The direction changing unit 20 includes an entrance direction changing unit 201 that changes the payout direction from a first direction D1, which is the payout direction upstream of the direction changing unit 20, to a second direction D2 that intersects, in a top view, with a third direction D3 that extends toward a predetermined attachment position (supply position) P of the zipper segment Z, and an exit direction changing unit 202 that changes the payout direction from the second direction D2 to the third direction D3.

Description

[Technical Field]

[0001] The present invention relates to a zipper supplying device that cuts zipper pieces from a zipper tape and supplies them. [Background technology]

[0002] Conventionally, there are known techniques related to zipper supply devices that supply zipper pieces. For example, Patent Document 1 describes a zipper supply device that uses an end welding device to crush the ends of a zipper tape that is unwound from a zipper reel to form a crushed portion that is welded to the zipper pieces, and then uses a cutting device to cut the zipper pieces. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-179035 Summary of the Invention [Problem to be solved by the invention]

[0004] In the zipper supply device described in Patent Document 1, the zipper reel to the cutting device are arranged in a straight line, which increases the overall length of the device, making the installation space tight and making it difficult to install the device.

[0005] SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a zipper supplying device that can save space by shortening the overall length. [Means for solving the problem]

[0006] In order to achieve the above object, the zipper supply device of the present invention comprises a rotatable zipper reel around which a zipper tape is wound, an end welding device that compresses the zipper tape fed from the zipper reel at a position that will become the end of the zipper piece and welds it to form a crushed portion, a cutting device that cuts the zipper tape with the crushed portion formed thereon to form the zipper piece, and a direction changing unit that changes the payout direction of the zipper tape between the zipper reel and the cutting device, wherein the direction changing unit has an entrance direction changing unit that changes the payout direction from a first direction, which is the payout direction upstream of the direction changing unit, to a second direction that intersects, in a top view, with a third direction extending toward the supply position of the zipper piece, and an exit direction changing unit that changes the payout direction from the second direction to the third direction. [Effects of the Invention]

[0007] According to the zipper supplying device of the present invention, it is possible to achieve space saving by shortening the overall length. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing the configuration of a bag making, filling and packaging machine equipped with a zipper supply device. [Figure 2] FIG. 2 is an explanatory diagram schematically showing a zipper piece. [Figure 3] FIG. 2 is a perspective view showing a zipper tape supply unit. [Figure 4] FIG. 2 is a perspective view showing an end welding device and a cutting device. [Figure 5] FIG. 4 is an explanatory diagram showing a direction changing roller. [Figure 6] FIG. 2 is a plan view showing the zipper supply device. [Figure 7] FIG. 10 is a plan view showing a zipper supply device of a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] (Bag making, filling and packaging machine) Figure 1 is a schematic diagram showing a bag making, filling and packaging machine equipped with a zipper supply device. Vertical bag making, filling and packaging machine 1 (hereinafter referred to as "packaging machine 1") is equipped with a bag making tube 2, a packaging material feeder 3, a vertical sealing device 4, a horizontal sealing device 5, a control device 8, and a zipper supply device 9. Each component of packaging machine 1 is supported by a main body frame (not shown). In the following description, "frame members (not shown)" refers to frame members fixed to the main body frame.

[0011] Packaging machine 1 is supplied with a filling material such as a powder or solid material, such as food, to be filled into bags F. Bag-forming tube 2 extends vertically and receives the filling material through a hopper (not shown) connected to its upper end. Alternatively, a filling tube extending vertically inside the bag-forming tube and connected to a hopper may be disposed, and the filling material may be supplied into bag-forming tube 2 via the filling tube.

[0012] A former 6 is attached to the bag-making tube 2, and a payout path 7 extends from the former 6 to the packaging material roll WR. A packaging material tension adjustment unit 7a is located midway along the payout path 7, which uses multiple dancer rollers to adjust the tension of the packaging material W along the path. A zipper piece Z (see Figure 2) supplied from a zipper supply device 9 is temporarily attached to the packaging material W by welding at a predetermined attachment position (supply position) P midway along the payout path 7. Note that Figure 1 is a schematic diagram, and the reference numerals for the former 6 and bag-making tube 2 indicate the parts that are inside the packaging material W.

[0013] The packaging material feeders 3 are arranged below the formers 6, one on each side of the bag-formed tube 2. Each packaging material feeder 3 has an endless suction belt that adsorbs the packaging material W onto the suction belt, and as the suction belt moves, pays out the packaging material W downward along the outer periphery of the bag-formed tube 2. As a result, the packaging material W, such as a heat-sealable film, is paid out from the packaging material roll WR along the payout path 7 and is guided downward along the outer periphery of the bag-formed tube 2 while being formed into a cylindrical shape that surrounds the bag-formed tube 2 by the formers 6. At this time, a lap portion is formed in the packaging material W, with both side edges of the cylindrical packaging material W overlapping each other in a predetermined shape.

[0014] The vertical sealing device 4 is disposed adjacent to the packaging material W on the outer peripheral surface of the bag-forming tube 2, and opens and closes relative to the bag-forming tube 2, using a pair of heater blocks to heat-seal the lapped portion of the packaging material W. The horizontal sealing device 5 is provided below the bag-forming tube 2, and forms a horizontal seal in the packaging material W by sandwiching and heat-sealing the packaging material W between a pair of openable and closable heater blocks, and then cuts the packaging material W with a cutter.

[0015] Additionally, a pair of zipper heater blocks 5z that finally attach the zipper pieces Z to the packaging material are provided adjacent to the pair of heater blocks of the horizontal sealing device 5. The pair of zipper heater blocks 5z open and close independently of the pair of heater blocks of the horizontal sealing device 5. As a result, when a horizontal seal is formed in the packaging material W, the zipper pieces Z are finally attached by welding to the inner surface of the cylindrically formed packaging material W by the pair of zipper heater blocks 5z. With the above configuration, the top and bottom ends of the cut packaging material W are closed, and a zippered bag F filled with a content is formed. The zipper pieces Z are provided in a location that corresponds to the opening position of the bag F.

[0016] The control device 8 is configured to include input / output devices, memory devices (ROM, RAM, non-volatile RAM, etc.), a central processing unit (CPU), etc., and performs overall control of the packaging machine 1. Specifically, the control device 8 controls the various devices and equipment of the packaging machine 1, such as the packaging material feeder 3, the vertical sealing device 4, the horizontal sealing device 5, and the zipper supply device 9, in accordance with various settings input via the input / output devices.

[0017] (Zipper piece) FIG. 2 is an explanatory diagram showing a schematic view of a zipper piece Z. FIG. 2(a) is a front view of the zipper piece Z, and FIG. 2(b) is a cross-sectional view taken along line AA in (a). The zipper piece Z has a male zipper piece ZA and a female zipper piece ZB. The male zipper piece ZA has a mating convex portion ZAt extending in the longitudinal direction and a male flange portion ZAf extending from the mating convex portion ZAt to one side in the lateral direction (width direction). The female zipper piece ZB has a mating recess ZBu extending in the longitudinal direction and female flange portions ZBf extending from the mating recess ZBu to both sides in the lateral direction (width direction). The male zipper piece ZA and the female zipper piece ZB form a mating portion Za by mating their mating convex portions ZAt and mating recesses ZBu with each other, thereby forming an integral zipper piece Z. The male flange portion ZAf and the female flange portion ZBf of the zipper piece Z are to be welded to the opposing inner surfaces of the bag F. At both longitudinal ends of the zipper piece Z, there are formed compressed portions Zb formed by compressing the mating portions Za, and crushed portions Zc formed by further crushing and welding the central portions of the compressed portions Zb. Such zipper pieces Z are formed by cutting the zipper tape T at the centers Zd of the crushed portions Zc.

[0018] (Zipper supply device) 1, the zipper supply device 9 includes a zipper tape supply unit 10, a direction change unit 20, an edge welding device 30, a cutting device 40, and a payout / conveying device 50, and temporarily attaches a zipper piece Z to the packaging material W at a predetermined attachment position P on the packaging material W by thermocompression bonding using a welding device (not shown). The predetermined attachment position P is determined so that the center of the packaging material W in the width direction coincides with the center of the zipper piece Z in the longitudinal direction. As shown in FIG. 1, an edge sensor E is provided near the packaging material W to detect the meandering of the packaging material W at its edge, and a control device 8 controls the payout / conveying device 50 (described later) based on the detection result of the edge sensor E.

[0019] FIG. 3 is a perspective view showing the zipper tape supply unit 10. The zipper tape supply unit 10 uses an electric motor M to rotate a zipper reel 10R (schematically shown in FIG. 1) loaded with a zipper roll ZR around which zipper tape T is wound, to feed out the zipper tape T. The zipper reel 10R and the electric motor M are rotatably attached to a first fixed plate 101. As shown in FIG. 1, the zipper roll ZR is disposed in a direction perpendicular to the axial direction of the packaging material roll WR, and the zipper tape T is fed out in a feeding direction that coincides with the width direction of the packaging material W in the packaging material feeding path 7. The zipper tape T fed from the zipper roll ZR is also fed out by a feeding conveying device 50, which will be described later. Hereinafter, the side of the zipper roll ZR on the feeding path of the zipper tape T will be referred to as the "upstream side," and the opposite side will be referred to as the "downstream side."

[0020] The tension of the zipper tape T unwound downstream from the zipper roll ZR is adjusted within the unwinding path by a tension adjusting device 11. The tension adjusting device 11 is attached to a second fixed plate 102 provided above a first fixed plate 101. The tension adjusting device 11 includes a plurality of fixed rollers 12, a plurality of movable rollers 13, a roller holding member 14, a dancer lever 15, and a dancer lever drive device 16. The zipper tape T extends downstream while being wound around the plurality of fixed rollers 12 held by the roller holding member 14 and the plurality of movable rollers 13 held by a dancer lever 15 that can swing up and down. One end of the dancer lever 15 is supported by the second fixed plate 102 via a shaft 151 so as to be rotatable together with a swing lever 161. The swing lever 161 is driven to rotate by an air cylinder 162 of the dancer lever drive device 16, thereby swinging up and down. The control device 8 adjusts the air pressure supplied to the air cylinder 162 based on the stroke position of the air cylinder 162, thereby appropriately adjusting the tension of the zipper tape T. The zipper tape T that has passed through the tension adjusting device 11 is guided downstream through the direction changing section 20.

[0021] 4 is a perspective view showing the edge welding device 30 and the cutting device 40. The edge welding device 30 is provided downstream of the direction changing unit 20. The edge welding device 30 is an ultrasonic device having an ultrasonic head 31 and an anvil 32 arranged opposite each other with the zipper tape T sandwiched therebetween. The edge welding device 30 is driven and controlled by the control unit 8, and generates ultrasonic waves from the ultrasonic head 31 while pressing and clamping the zipper tape T between the ultrasonic head 31 and the anvil 32, thereby forming the above-mentioned compressed portions Zb and crushed portions Zc in the zipper tape T. The compressed portions Zb and crushed portions Zc are formed at intervals corresponding to the length of the zipper piece Z by intermittently feeding out the zipper tape T.

[0022] The cutting device 40 is disposed downstream of the end welding device 30 and aligned in a straight line. The cutting device 40 includes a knife 44 (FIG. 1) that is movable vertically, a drive device 42 that moves the knife 44, and a clamping member 43 that clamps the zipper tape T when the knife 44 cuts the zipper tape T. The cutting device 40 is driven and controlled by a control device 8, and the knife 44 cuts the zipper tape T at intervals corresponding to the length of the zipper pieces Z. The drive device 42, the clamping member 43, and the knife 44 are disposed on a support plate 41. The support plate 41 is movably attached to a rail 63 that extends on a base 61 in the payout direction of the zipper tape T, thereby allowing the position of the cutting device 40 to be adjusted in the payout direction of the zipper tape T. That is, in this embodiment, the end welding device 30 and the cutting device 40 are configured so that their relative positions in the payout direction of the zipper tape T are adjustable, allowing the length of the zipper pieces Z to be easily adjusted.

[0023] The unwinding and conveying device 50 has a unwinding member 51 and a conveying member 52. The unwinding member 51 is a mechanism for intermittently unwinding the zipper tape T at a length of zipper piece Z according to the product specifications of the bag F. The unwinding member 51 includes gripping claws for gripping the leading end of the zipper tape T and an air chuck for opening and closing the gripping claws, and is configured to be movable in the unwinding direction of the zipper tape T by power from, for example, an electric motor. The conveying member 52 is a mechanism for conveying the zipper piece Z after cutting to the joining position P. The conveying member 52 includes gripping claws for gripping the zipper piece Z and an air chuck for opening and closing the gripping claws, and is configured to be movable in the unwinding direction of the zipper piece Z by power from, for example, an electric motor. The control device 8 controls the driving of the unwinding member 51 and the conveying member 52.

[0024] (Direction change part) Next, the direction changing unit 20 will be described in detail. In the following description, one horizontal direction along the unwinding direction of the zipper tape T will be referred to as the "direction X," and the other horizontal direction perpendicular to the direction X will be referred to as the "direction Y." Furthermore, within the direction X, the direction in which the zipper tape T is unwound upstream of the direction changing unit 20 will be referred to as the "first direction D1," and the direction in which the zipper tape T is unwound downstream of the direction changing unit 20 will be referred to as the "third direction D3." The third direction D3 is opposite to the first direction D1 and is the same as the direction in which the zipper piece Z is transported toward the predetermined attachment position P. Furthermore, within the direction Y, the direction in which the zipper tape T is unwound will be referred to as the "second direction D2," and the side opposite to the second direction D2 will be referred to as the "fourth direction D4." The first direction D1 and the third direction D3 are perpendicular to (intersect with) each other in a top view.

[0025] As shown in FIG. 3, the direction changing unit 20 includes a plurality of direction changing rollers 20R around which the zipper tape T is wound. FIG. 5 is an explanatory diagram showing the direction changing roller 20R. FIG. 5(a) is a perspective view of the direction changing roller 20R, and FIG. 5(b) is a side view of the direction changing roller 20R. As shown in the figures, the direction changing roller 20R is formed in a cylindrical shape and has an outer peripheral surface 20a that contacts the zipper tape T and protruding portions 20b that protrude from the outer peripheral surface 20a at both axial ends. As shown in FIG. 3, the direction changing roller 20R includes a first direction changing roller (first direction changing unit) 21, a second direction changing roller (second direction changing unit) 22, a third direction changing roller (third direction changing unit) 23, and a fourth direction changing roller (fourth direction changing unit) 24.

[0026] The first direction changing roller 21 is a fixed roller 12 provided at the most downstream side of the roller holding member 14, and is arranged to be rotatable about an axis along the direction Y. The second direction changing roller 22 is arranged at a position spaced above the first direction changing roller 21 and to be rotatable about an axis along the direction X. The third direction changing roller 23 is arranged at a position spaced from the second direction changing roller 22 in the second direction D2 and to be rotatable about an axis along the direction X. The fourth direction changing roller 24 is arranged at a position spaced below the third direction changing roller 23 and to be rotatable about an axis along the direction Y. The second direction changing roller 22, the third direction changing roller 23, and the fourth direction changing roller 24 are provided on a frame member (not shown).

[0027] The zipper tape T extends upward from the zipper roll ZR, then passes through the tension adjusting device 11, extends in the first direction D1, and is looped from below around the first direction changing roller 21, which is one of the fixed rollers 12. This changes the payout direction of the zipper tape T from the first direction D1 to an upward direction. Furthermore, the zipper tape T extends upward while being twisted 90 degrees between the first direction changing roller 21 and the second direction changing roller 22, and is looped around the second direction changing roller 22 so as to head toward the second direction D2. Therefore, the first direction changing roller 21 and the second direction changing roller 22 function as an entry direction changing section 201 that changes the payout direction of the zipper tape T from the first direction D1 to the second direction D2 in a top view.

[0028] The zipper tape T that has passed the second direction changing roller 22 extends in the second direction D2 above the second fixed plate 102, i.e., above the dancer lever 15 and the dancer lever drive device 16, and is then looped around the third direction changing roller 23 so as to face downward. Furthermore, the zipper tape T extends downward while being twisted 90 degrees between the third direction changing roller 23 and the fourth direction changing roller 24, and is then looped around the fourth direction changing roller 24 so as to face the third direction D3. Therefore, the third direction changing roller 23 and the fourth direction changing roller 24 function as an outlet direction changing section 202 that changes the payout direction of the zipper tape T from the second direction D2 to the third direction D3 in a top view.

[0029] 6 is a plan view showing the zipper supply device 9. As indicated by the white arrows in the figure, the zipper tape T extends in a first direction D1 from the zipper roll ZR to the entrance direction changing section 201, extends in a second direction D2 from the entrance direction changing section 201, and extends in a third direction D3 from the exit direction changing section 202, in a top view. In other words, the payout direction of the zipper tape T is changed by 180 degrees in a top view from the entrance side to the exit side of the direction changing section 20, and is changed by 90 degrees in a top view before and after the exit direction changing section 202. In further words, the zipper tape T is paid out along a path that forms a U-shape in a top view at the direction changing section 20, and is paid out along a path that forms an L-shape in a top view before and after the exit direction changing section 202. As a result, the area A1 (dashed line) where the zipper roll ZR and tension adjustment device 11 are arranged and the area A2 (dotted line) where the end welding device 30, cutting device 40, etc. are arranged can be arranged side by side along the direction Y.

[0030] In contrast, Fig. 7 is a plan view showing a zipper supply device of a comparative example. The zipper supply device 90 of the comparative example does not have a direction changer 20, and an area A1 (dashed line) in which the zipper roll ZR and tension adjuster 11 are arranged and an area A2 (chain line) in which the edge welding device 30, cutting device 40, etc. are arranged are arranged on a straight line along the direction X. Therefore, the zipper supply device 90 of the comparative example has a longer overall length than the zipper supply device 9 of the embodiment shown in Fig. 6. If the distances from the end of the packaging material W to the ends of the zipper supply devices 9, 90 are "L1" and "L2," respectively, the distance L1 in the zipper supply device 9 of the embodiment can be made shorter than the distance L2 in the comparative example, making it possible to make the entire packaging machine 1 more compact.

[0031] Downstream of the direction changing section 20 configured as described above, the orientations of the upper and lower surfaces of the zipper tape T need to be set to match the attachment orientation of the zipper piece Z to the bag F. Therefore, the twisting direction tw1 of the zipper tape T between the first direction changing roller 21 and the second direction changing roller 22 and the twisting direction tw2 of the zipper tape T between the third direction changing roller 23 and the fourth direction changing roller 24 shown in FIG. 3 are determined according to the attachment orientation of the zipper piece Z. However, the task of winding the zipper tape T around each direction changing roller 20R is performed manually by an operator. Therefore, if the operator makes a mistake in the twisting directions tw1 and tw2, the attachment orientation of the zipper piece Z to the bag F will be opposite to the product specifications.

[0032] Therefore, as shown in FIG. 5 , a slit S is formed in the outer peripheral surface 20a of the direction changing roller 20R of this embodiment. Two slits S are formed at a distance from each other in one axial half of the direction changing roller 20R. The slits S are formed as marks for catching the portion of the zipper tape T where both the male flange portion ZAf and the female flange portion ZBf are formed. Note that the slit S may also be used as a mark for catching the portion of the zipper tape T where only the female flange portion ZBf is formed. This allows the attachment orientation of each direction changing roller 20R to be adjusted in advance so that the top and bottom surfaces of the zipper tape T on the downstream side of the direction changing section 20 are oriented appropriately according to the above-mentioned product specifications, thereby preventing errors in the twist directions tw1 and tw2 of the zipper tape T using the slits S as marks.

[0033] (Effects of the embodiment) As described above, the zipper supply device 9 of the embodiment includes a rotatable zipper reel 10R around which the zipper tape T is wound, an end welding device 30 that compresses and welds the zipper tape T fed from the zipper reel 10R at positions that will become ends of the zipper segments Z to form compressed portions Zc, a cutting device 40 that cuts the zipper tape T with the compressed portions Zc formed thereon to form zipper segments Z, and a direction changing unit 20 that changes the feeding direction of the zipper tape T between the zipper reel 10R and the cutting device 40. The direction changing unit 20 includes an entrance direction changing unit 201 that changes the feeding direction from a first direction D1, which is the feeding direction upstream of the direction changing unit 20, to a second direction D2 that intersects, in a top view, with a third direction D3 that extends toward a predetermined attachment position (feed position) P of the zipper segment Z, and an exit direction changing unit 202 that changes the feeding direction from the second direction D2 to the third direction D3.

[0034] With this configuration, the feeding direction of the zipper tape T can be turned back at least from the second direction D2 to the third direction D3 in a top view between the zipper reel 10R and the cutting device 40. Therefore, the arrangement area of ​​the devices arranged between the zipper reel 10R and the cutting device 40, in this case the areas A1 and A2, can be aligned when viewed horizontally (when viewed from the direction Y). Therefore, according to the zipper supply device 9 of the embodiment, it is possible to achieve space saving by shortening the overall length.

[0035] Moreover, the direction changer 20 is disposed between the zipper reel 10R and the end welding device 30. With this configuration, the zipper reel 10R, the end welding device 30, and the cutting device 40 can be arranged side by side when viewed from the direction Y. In particular, the end welding device 30 and the cutting device 40 are preferably arranged close to each other in a straight line to facilitate adjustment of the length of the zipper pieces Z. According to the zipper supply device 9 of this embodiment, even when the end welding device 30 and the cutting device 40 are arranged in a straight line, the overall length of the device can be shortened as described above, thereby saving space.

[0036] In addition, the entrance direction conversion section 201 has a first direction conversion roller (first direction conversion section) 21 that converts the payout direction from the first direction D1 to an upward direction, and a second direction conversion roller (second direction conversion section) 22 that converts the payout direction from an upward direction to a second direction D2, and the exit direction conversion section 202 has a third direction conversion roller (third direction conversion section) 23 that converts the payout direction from the second direction D2 to a downward direction, and a fourth direction conversion roller (fourth direction conversion section) 24 that converts the payout direction from a downward direction to a third direction D3.

[0037] With this configuration, the payout direction of the zipper tape T forms a U-shape that is convex upward when viewed horizontally (from direction X) between the first direction changing roller 21 and the fourth direction changing roller 24. This allows space to be secured inside (below) the U-shape for arranging other devices and components such as the dancer lever 15, the dancer lever drive device 16, and the second fixed plate 102, improving the layout flexibility of the device. Furthermore, because the zipper tape T is changed in one direction for each direction changing roller 20R, the zipper tape T can be easily wrapped around and set.

[0038] The direction changing section 20 is configured by a plurality of rotatable direction changing rollers 20R around which the zipper tape T is wound. With this configuration, the direction changing section 20 can be configured simply and inexpensively.

[0039] Furthermore, a slit S extending in the circumferential direction is formed in either half of the axial direction of the outer peripheral surface 20a of the direction changing roller 20R. With this configuration, as described above, the slit S can be used as a mark when wrapping the zipper tape T around the direction changing roller 20R, and therefore, it is possible to prevent mistakes from occurring in the twist directions tw1, tw2 of the zipper tape T between the direction changing rollers 20R.

[0040] Although the description of the embodiment has been completed, the aspects of the present invention are not limited to this embodiment. For example, in this embodiment, the direction changer 20 is provided between the zipper reel 10R and the tension adjuster 11 and the end welding device 30. However, the zipper reel 10R, the tension adjuster 11, and the end welding device 30 may be arranged linearly along the first direction D1, and the direction changer 20 may be provided between the end welding device 30 and the cutting device 40.

[0041] In the present embodiment, the first direction D1 and the second direction D2 are perpendicular to each other, and the second direction D2 and the third direction D3 are perpendicular to each other. However, the first direction D1, the second direction D2, and the third direction D3 may be any direction as long as the second direction D2 and the third direction D3 form a substantially L-shape in top view and the third direction D3 coincides with the direction in which the zipper tape T extends toward the predetermined attachment position P of the zipper piece Z. For example, the first direction D1, the second direction D2, and the third direction D3 may not be perpendicular to each other but may simply intersect each other. Furthermore, the first direction D1 may be a direction different from that shown in the embodiment, such as a substantially upward direction. In the present embodiment, the fixed rollers 12 and the movable rollers 13 of the tension adjustment device 11 are aligned along the direction X. However, the tension adjustment device 11 may be arranged so that the fixed rollers 12 and the movable rollers 13 are aligned along the vertical direction. In this case, the zipper tape T may be unwound in a substantially upward direction from the zipper roll ZR to the downstream side of the tension adjusting device 11, and then changed in direction by the second direction changing roller 22 to the second direction D2.

[0042] Furthermore, the direction change unit 20 is not limited to the rotatable direction change roller 20R, but may be composed of other members capable of changing the payout direction of the zipper tape T, such as a member that slides against the zipper tape T. [Explanation of symbols]

[0043] 1 Packaging machine (bag making, filling and packaging machine) 8 Control Device 9 Zipper supply device 10R Zipper Reel 20 Direction change section 20R direction change roller 21-24 1st direction change roller to 4th direction change roller 201 Incoming direction conversion unit 202 Output direction conversion unit 30 End welding device 40 Cutting device P Prescribed attachment position (supply position) S slit T zipper tape D1~D4 1st direction~4th direction Z zipper piece ZR Zipper Roll

Claims

1. A freely rotating zipper reel with zipper tape wrapped around it, an end welding device for compressing and welding the zipper tape unwound from the zipper reel at a position that will become an end of a zipper piece to form a compressed portion; a cutting device for cutting the zipper tape having the crushed portions formed thereon to form the zipper pieces; a direction changing unit that changes the feeding direction of the zipper tape between the zipper reel and the cutting device; Equipped with The direction change unit is an inlet direction changer that changes the feeding direction from a first direction, which is the feeding direction on an upstream side of the inlet direction changer, to a second direction that intersects, in a top view, with a third direction extending toward a supply position of the zipper pieces; an outlet direction changer that changes the feeding direction from the second direction to the third direction; A zipper feeding device having:

2. 2. The zipper supplying device according to claim 1, wherein the direction changer is disposed between the zipper reel and the end welding device.

3. the inlet direction changer includes a first direction changer that changes the feeding direction from the first direction to an upward direction, and a second direction changer that changes the feeding direction from the upward direction to the second direction, The outlet direction changer includes a third direction changer that changes the payout direction from the second direction to a downward direction, and a fourth direction changer that changes the payout direction from a downward direction to the third direction.

2. The zipper feeding apparatus of claim 1.

4. 4. The zipper supply device according to claim 1, wherein the direction change section is configured by a plurality of rotatable direction change rollers around which the zipper tape is wound.

5. 5. The zipper supply device according to claim 4, wherein a slit extending along the circumferential direction is formed on one half of the outer peripheral surface of the direction-changing roller in the axial direction.

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