Clipping device and width stretching device

Abstract

To provide a clipping device capable of performing stable gripping and gripping release operations in a small installation space even during high-speed transportation.SOLUTION: A clipping device 100 includes a gripping clip 10, a closer 20, and an opener 30, and the closer 20 and the opener 30 include a first magnet 21 and a second magnet 22, or a first magnet 31 and a second magnet 32, with the first magnet 21 or the first magnet 31 arranged so that a magnetization direction thereof is aligned toward the gripping clip 10, and the second magnet 22 or the second magnet 32 arranged so that a magnetization direction thereof is perpendicular to the magnetization direction of the first magnet 21 or the first magnet 31, so as to concentrate magnetic field lines on a side of the first magnet 21 or the first magnet 31.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a clipping device and a width stretching device, and more particularly to a clipping device that grips the widthwise ends of a sheet-like material, and a width stretching device that stretches the width of the sheet-like material. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a clip device that grips the widthwise ends of a sheet-like material and a width stretching device that stretches the width of the sheet-like material are known (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 discloses a clip device that grips both ends of a sheet-like object in the width direction in a transverse stretching machine (width stretching device) that stretches the sheet-like object in the width direction perpendicular to the conveying direction. The clip device disclosed in the above-mentioned Patent Document 1 discloses a configuration in which a clip closer and a clip opener are used to open and close a clip that moves together with the sheet-like object. In the above-mentioned Patent Document 1, a plurality of clip closers and clip openers including permanent magnets are provided at intervals along the conveying direction of the sheet-like object, and the clips are attracted by the magnetic force of the plurality of magnets provided at intervals and moved stepwise to grip the sheet-like object or release the gripped state of the sheet-like object. In addition, in the above-mentioned Patent Document 1, the clip device is configured to extend the width of the sheet-like object by traveling so as to expand in the width direction of the sheet-like object while gripping the sheet-like object. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3422040 Summary of the Invention [Problem to be solved by the invention]

[0005] In the clip device described in the above Patent Document 1, a plurality of clip closers and clip openers including magnets are provided at intervals along the conveying direction of the sheet-like material, and the clip is attracted by the magnetic force of the plurality of permanent magnets provided at intervals and moved stepwise to grip the sheet-like material or release the gripped state of the sheet-like material. Here, in recent years, there has been a demand for high-speed conveyance of sheet-like materials in order to improve productivity. However, during such high-speed conveyance of sheet-like materials, the time during which the magnetic force generated from the magnet acts on the clip becomes short. In this case, before the gripping operation and the gripping state release operation of the clip are completed, the clip may move to a position where it is not affected by the magnetic force generated from the magnet. As a result, during high-speed conveyance of the sheet-like material, the gripping operation and the gripping state release operation of the clip may not be performed stably. In addition, in order to extend the time during which the magnetic force generated from the magnet acts on the clip, the installation space of the magnet along the conveying direction of the sheet-like material becomes large. Therefore, there is a demand for a clip device and a width stretching device that can perform stable gripping operation and gripping state release operation in a small installation space even during high-speed conveyance.

[0006] The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a clip device and a width stretching device that are capable of performing stable gripping and gripping release operations in a small installation space, even during high-speed transport. [Means for solving the problem]

[0007] In order to achieve the above object, a clip device according to a first aspect of the present invention includes a gripping clip that grips an end of a sheet-like object in a width direction perpendicular to a conveying direction in which the sheet-like object is conveyed, a clip gripping operation drive unit that uses magnetic force to move the gripping clip in a non-contact manner so that the gripping clip grips the sheet-like object, and a clip release operation drive unit that uses magnetic force to move the gripping clip in a non-contact manner so that the gripping clip releases the gripped state of the sheet-like object, and at least one of the clip gripping operation drive unit and the clip release operation drive unit includes a first magnet and a second magnet, and the first magnet and the second magnet are arranged above the sheet-like object, perpendicular to the surface on which the sheet-like object extends and along a surface extending in the width direction, the first magnet is arranged so that its magnetization direction is along the direction toward the gripping clip, and the second magnet is arranged so that its magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate magnetic lines on the first magnet side. Here, the "sheet-like object" in the present invention is a broad concept including a film, a resin sheet, a carbon fiber sheet, a web, and the like.

[0008] In the clip device according to the first aspect of the present invention, as described above, the first magnet and the second magnet are arranged above the sheet-like material, perpendicular to the surface on which the sheet-like material extends and aligned along the surface extending in the width direction, the first magnet is arranged so that the magnetization direction is along the direction toward the gripping clip, and the second magnet is arranged so that the magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate the magnetic field lines on the first magnet side. As a result, since the second magnet is arranged so as to concentrate the magnetic field lines on the first magnet side, the magnetic force on the first magnet side is strengthened, and a strong magnetic force acts on the gripping clip. Therefore, it is possible to shorten the time required for the gripping clip to operate, compared to when the magnetic force acting on the gripping clip is weak. As a result, it is possible to provide a clip device that can perform stable gripping and gripping state release operations in a small installation space even during high-speed transport.

[0009] In the clip device according to the first aspect, the first magnet and the second magnet are preferably arranged so that the polarity of the surface of the second magnet facing the first magnet and the polarity of the surface of the first magnet facing the gripping clip are the same. With this configuration, the magnetic force generated from the surface of the second magnet facing the first magnet and the magnetic force generated from the surface of the first magnet facing the gripping clip reinforce each other on the first magnet side. As a result, it is possible to provide a clip device capable of performing more stable gripping and gripping release operations.

[0010] In this case, preferably, the clip gripping operation drive unit includes a first magnet and a second magnet, and the first magnet included in the clip gripping operation drive unit is disposed at a position farther away from the center of the width direction of the sheet-like object than the second magnet included in the clip gripping operation drive unit. With this configuration, a strong magnetic force can be generated in the gripping clip at a position farther away from the center of the width direction of the sheet-like object. As a result, the gripping clip can be moved to a position farther away from the center of the width direction of the sheet-like object to grip the sheet-like object.

[0011] In the above-mentioned configuration in which the clip gripping operation drive unit includes a first magnet and a second magnet, preferably, the clip releasing operation drive unit includes a first magnet and a second magnet, and the first magnet included in the clip releasing operation drive unit is disposed at a position closer to the center of the width direction of the sheet-like object than the second magnet included in the clip releasing operation drive unit. With this configuration, a strong magnetic force can be generated in the gripping clip at a position closer to the center of the width direction of the sheet-like object. As a result, the gripping clip can be moved to a position closer to the center of the width direction of the sheet-like object to release the gripped state of the sheet-like object.

[0012] In the clip device according to the first aspect, the first magnet and the second magnet are preferably arranged so that the surface of the first magnet facing the gripping clip and the surface of the second magnet facing the gripping clip are flush with each other. With this arrangement, the magnetic field lines generated by the second magnet are aligned with the magnetic field lines generated by the first magnet. As a result, the magnetic force acting on the gripping clip can be further strengthened.

[0013] In this case, preferably, the clip gripping operation drive unit and the clip releasing operation drive unit are arranged on the opposite side of the gripping clip with respect to the first magnet and the second magnet, and further include a yoke through which the magnetic field lines of the first magnet and the second magnet pass, and the first magnet and the second magnet are arranged and attached to the yoke so that the face of the first magnet facing the yoke and the face of the second magnet facing the yoke are on the same plane. With this configuration, the face of the first magnet facing the yoke and the face of the second magnet facing the yoke are on the same plane, so that the first magnet and the second magnet can be easily attached to the yoke.

[0014] In order to achieve the above object, a width stretching device according to a second aspect of the present invention includes a gripping clip that grips an end of a sheet-like material in a width direction perpendicular to a conveying direction in which the sheet-like material is conveyed, a clip gripping operation drive unit that uses magnetic force to move the gripping clip in a non-contact manner so that the gripping clip grips the sheet-like material, and a clip release operation drive unit that uses magnetic force to move the gripping clip in a non-contact manner so that the gripping clip releases the gripped state of the sheet-like material, and at least one of the clip gripping operation drive unit and the clip release operation drive unit is a first magnet and The gripping clip includes a second magnet, and the first and second magnets are arranged side by side above the sheet-like material, perpendicular to the surface along which the sheet-like material extends and along a surface extending in the width direction, the first magnet is arranged so that its magnetization direction is along the direction toward the gripping clip, and the second magnet is arranged so that its magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate magnetic field lines on the first magnet side, and the gripping clip is configured to move in the width direction away from the center of the width of the sheet-like material while gripping the sheet-like material, thereby extending the width of the sheet-like material.

[0015] In the width stretching device according to the second aspect of the present invention, as described above, at least one of the clip gripping operation drive unit and the clip releasing operation drive unit includes a first magnet and a second magnet, and the first magnet and the second magnet are arranged above the sheet-like material, perpendicular to the surface on which the sheet-like material extends, and aligned along a surface extending in the width direction, the first magnet is arranged so that its magnetization direction is along the direction toward the gripping clip, and the second magnet is arranged so that its magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate magnetic field lines on the first magnet side, and the gripping clip is configured to move in the width direction so as to move away from the center of the width direction of the sheet-like material while gripping the sheet-like material, thereby extending the width direction length of the sheet-like material. As a result, since the second magnet is arranged so as to concentrate magnetic field lines on the first magnet side, the magnetic force on the first magnet side is strengthened, and a strong magnetic force acts on the gripping clip. Therefore, it is possible to shorten the time required for the gripping clip to operate, compared to when the magnetic force acting on the gripping clip is weak. As a result, it is possible to provide a width stretching device that can extend the width of a sheet-like material using a clip device that performs stable gripping and release operations in a small installation space, even during high-speed transport. Effect of the Invention

[0016] According to the present invention, as described above, it is possible to provide a clipping device that is capable of performing stable gripping and gripping release operations in a small installation space even during high-speed transport. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing a configuration of a width stretching device according to an embodiment. [Diagram 2] 1A-1C illustrate a gripping clip and closer configuration according to one embodiment. [Diagram 3] 13A-13C are diagrams illustrating a gripping clip being rotated according to one embodiment. [Figure 4] FIG. 13 illustrates a state in which the gripping clips grip a film, according to one embodiment. [Diagram 5] FIG. 13 is a diagram for explaining magnetic field lines generated in a closer or opener according to the comparative example. [Figure 6] FIG. 2 is a diagram for explaining magnetic field lines generated in a closer or opener according to an embodiment. [Figure 7] 1A-1C illustrate a gripping clip and opener configuration according to one embodiment. [Figure 8] 13A-13C are diagrams illustrating a gripping clip being rotated according to one embodiment. [Figure 9] FIG. 13 is a diagram illustrating a state in which the gripping clip releases its grip on the film according to one embodiment. [Figure 10] 13 is a diagram for explaining the arrangement of a first magnet and a second magnet according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] The configuration of a width stretching apparatus 200 according to the present embodiment will be described with reference to FIG.

[0020] (width stretching device) As shown in FIG. 1, the width stretching device 200 includes a clip device 100, a heating furnace 40, and a rail 50, and is a device for stretching a film F. In the drawing, the direction in which the film F is transported is the X direction. Among the directions in which the surface of the film F extends, the direction perpendicular to the X direction is the Y direction. The direction perpendicular to the X direction and the Y direction is the Z direction. In this embodiment, a configuration in which the film F transported from the X2 direction to the X1 direction is stretched in the Y direction using the clip device 100 provided in the width stretching device 200 will be described. The film F, the closer 20, and the opener 30 are examples of the "sheet-like object," the "clip gripping operation drive unit," and the "clip release operation drive unit" in the claims, respectively.

[0021] In this embodiment, the film F is a web sheet of a resin material that is deformed by heat, and in this embodiment, a film F made of PET (Polyethylene Terephthalate) is used. The film F is longitudinally stretched in the X direction before being conveyed to the clipping device 100, and is biaxially stretched by being heated in a heating furnace 40 and laterally stretched in the Y direction by the clipping device 100 to become a product. A detailed configuration of the clipping device 100 will be described later.

[0022] The heating furnace 40 is a furnace for heating the film F, and is provided with a heater (not shown) inside. The temperature inside the heating furnace 40 is adjusted to a desired temperature depending on the material of the film F. In this embodiment, the temperature inside the heating furnace 40 is maintained at 200°C.

[0023] The rails 50 are for allowing the multiple gripping clips 10 to travel as the film F is transported. A pair of rails 50 are provided, including a rail 50a disposed on the Y1 direction side of the film F and a rail 50b disposed on the Y2 direction side of the film F. Each of the rails 50a and 50b has an annular structure.

[0024] Next, the configuration of a clipping device 100 according to the present embodiment will be described with reference to FIGS.

[0025] (Clip device) As shown in FIG. 1, the clip device 100 includes a plurality of gripping clips 10, a plurality of closers 20, and a plurality of openers 30, each running along a pair of rails 50a and 50b.

[0026] The gripping clip 10 is for gripping the film F in the Y direction by pinching the Y direction end of the film F being conveyed, and stretching the film F in the width direction (Y direction). The gripping clip 10 is provided symmetrically along each of a pair of annular rails 50a and 50b with respect to the center line Fs of the film F in the Y direction as an axis, and is configured to grip both ends of the film F in the Y direction. The gripping clips 10 are attached at regular intervals to a chain (not shown) guided by each of the rails 50a and 50b, and run on the outer periphery of the annular rails 50a and 50b together with the chain (not shown). As a result, the gripping clip 10 is configured to run along the rail 50 while gripping both ends of the film F, and stretch the film F in the Y direction.

[0027] In this embodiment, the clip device 100 includes a lever portion 11 that is attracted to the closer 20 and a gripping portion 12 for gripping the film F, as shown in FIG. 2. In this embodiment, the head 11a of the lever portion 11 shown in FIG. 2 to FIG. 4 is made of a magnetic metal material such as SUS430. The gripping clip 10 includes a fixed base 13 and is attached so as to rotate around an axis of the base 13 along the X direction. The gripping clip 10 is rotated by the closer 20 so as to pinch and grip the film F being transported between the gripping portion 12 and the base 13. Note that FIG. 2 to FIG. 4 and the following description are of the closer 20 on the rail 50a side shown in FIG. 1 as viewed from the X1 side, but the closer 20 on the rail 50b side has a similar configuration.

[0028] The closer 20 is for rotating each of the multiple gripping clips 10 so that each of the multiple gripping clips 10 pinches the film F. The closer 20 includes a first magnet 21, a second magnet 22, a yoke 23, and a case 24. The closer 20 rotates around an axis along the X direction along a support part 25 formed on an arch, and is fixed at an arbitrary position by a fastening member 26. The closer 20 is provided so as to be close to the head 11a of the gripping clip 10, for example, provided at a distance of 5 mm from the head 11a of the gripping clip 10. The first magnet 21 and the second magnet 22 included in the closer 20 are configured to generate a magnetic force and attract the head 11a of the gripping clip 10 to rotate the gripping clip 10.

[0029] Further, the closers 20 are fixed at positions along a pair of annular rails 50a, and a plurality of closers 20 are provided along the X direction in FIG. 1. In this embodiment, three closers 20 are provided at predetermined portions of the rails 50a. Further, as shown in FIGS. 2 to 4, the three closers 20 are arranged at positions offset from each other so as to move away from the top of the track on which the closers 20 rotate as the film F moves toward the X1 direction from the upstream side toward the downstream side, and are fixed to the support portion 25. Specifically, one of the three closers 20 provided along the X1 direction is arranged in a state rotated about 5° clockwise from the top of the track as it moves toward the X1 direction (see FIG. 2), the other is arranged in a state rotated about 15° clockwise from the top of the track on which it rotates (see FIG. 3), and still another is arranged in a state rotated about 30° clockwise from the top of the track on which it rotates (see FIG. 4). As a result, each of the multiple gripping clips 10 is rotated stepwise while traveling in the X1 direction to grip the film F.

[0030] The first magnet 21 and the second magnet 22 included in the closer 20 are made of rare earth magnets, and in this embodiment, neodymium magnets are used. Here, in this embodiment, the first magnet 21 is provided so that the magnetization direction of the first magnet 21 is along the direction toward the gripping clip 10. Specifically, as shown in Figs. 2 to 4, the N-pole side surface 21a of the first magnet 21 is provided so as to face the gripping clip 10. In addition, the second magnet 22 is arranged so that the N-pole side surface 22c of the second magnet 22 faces the first magnet 21 and the magnetization direction of the second magnet 22 is perpendicular to the magnetization direction of the first magnet 21. In this embodiment, the first magnet 21 and the second magnet 22 are fixed to each other with an adhesive of an epoxy material.

[0031] The first magnet 21 and the second magnet 22 are arranged such that the surface 21a of the first magnet 21 facing the gripping clip 10 and the surface 22a of the second magnet 22 facing the gripping clip 10 are flush with each other. Furthermore, the first magnet 21 is arranged on a position away from the center (center line Fs) of the film F in the Y direction relative to the second magnet 22. Specifically, as shown in Figs. 2 to 4, the center (center line Fs) of the film F in the Y direction is in the Y2 direction, and therefore the first magnet 21 is arranged on the Y1 direction side of the second magnet 22.

[0032] Here, using the comparative example of FIG. 5, the relationship between the magnetic field lines M1a and M2a when the first magnet 121 and the second magnet 122 are arranged in a different direction from the present invention will be described. The magnetic field lines M1a or M2a are generated from each of the first magnet 121 and the second magnet 122 so as to go from the N pole to the S pole. In this comparative example, the N pole of the first magnet 121 and the S pole of the second magnet 122 are arranged adjacent to each other, so that the magnetic field lines M1a generated from the first magnet 121 go toward the S pole of the adjacent second magnet 122. In addition, the magnetic field lines M2a generated from the N pole of the second magnet 122 also go toward the S pole side of the first magnet 121. Thus, in the configuration of the comparative example shown in FIG. 5, only the magnetic field lines M1a of the first magnet 121 act in the Z2 direction, so that the magnetic force acting on the gripping clip 10 arranged in the Z2 direction may be small.

[0033] Next, the relationship between the magnetic field lines M1 and M2 of the first magnet 21 and the second magnet 22 of the closer 20 arranged as in this embodiment of FIG. 6 will be described. As described above, in this embodiment, unlike the comparative example, the second magnet 22 is arranged so that the N pole side of the magnetization direction of the second magnet 22 faces the first magnet 21 and the magnetization direction of the second magnet 22 is perpendicular to the magnetization direction of the first magnet 21. When arranged in this manner, both the magnetic field lines M1 and the magnetic field lines M2 are generated so that magnetic forces act in the Z2 direction, and the magnetic forces are strengthened especially on the first magnet 21 side. As a result, the configuration of the present invention is configured so that the magnetic force acting in the Z2 direction is stronger than the arrangement of the first magnet 21 and the second magnet 22 as in the comparative example shown in FIG. 5.

[0034] The yoke 23 included in the closer 20 is made of a magnetic metal material, and in this embodiment, SUS430 is used. The yoke 23 is disposed on the opposite side of the direction in which the film F is provided with respect to the first magnet 21 and the second magnet 22. The first magnet 21 and the second magnet 22 are disposed so that the surface 21b of the first magnet 21 facing the yoke 23 and the surface 22b of the second magnet 22 facing the yoke 23 are on the same plane, and are attached to the yoke 23. The yoke 23 is configured to guide a part of the magnetic lines M1 and M2 emitted from each of the first magnet 21 and the second magnet 22 into the yoke 23. In this embodiment, the yoke 23 is provided with a fixing hole (not shown) for fixing the fastening member 26 shown in Figs. 2 to 4 on the side close to the support part 25 described later, and is configured to fix the position of the closer 20 by fastening it to the support part 25 at an arbitrary position.

[0035] The case 24 included in the closer 20 is made of a non-magnetic metal material, and in this embodiment, SUS304 is used. The case 24 is also formed thin enough not to affect the magnetic field lines M1 and M2 generated by the first magnet 21 and the second magnet 22, respectively. Even if magnetic dust or the like adheres to the periphery of the case 24, the case 24 is made of a non-magnetic metal material, so that the adhered matter can be easily removed from the case 24 by removing the first magnet 21 and the second magnet 22.

[0036] Support portion 25 is made of a non-magnetic metal material and is provided so as to extend in an arch shape from a direction (Y1 direction) away from the center in the Y direction of film F to a direction (Y2 direction) approaching the center in the Y direction of film F. Support portion 25 is provided with a slit (not shown) that extends along the arch-like extension direction, and is configured so that fastening member 26 can be inserted therethrough. In this embodiment, fastening member 26 is a bolt.

[0037] Next, the configuration of the opener 30 will be described with reference to Figs. 7 to 9. The opener 30 includes a first magnet 31, a second magnet 32, a yoke 33, and a case 34, similar to the closer 20, and rotates around an axis along the X direction along a support portion 35 formed on an arch, and is fixed at an arbitrary position by a fastening member 36. The opener 30 is provided so as to be close to the head 11a of the gripping clip 10, for example, provided at a distance of 5 mm from the head 11a of the gripping clip 10. Note that Figs. 7 to 9 and the following description are for the case where the opener 30 on the rail 50a side shown in Fig. 1 is viewed from the X1 side, but the opener 30 on the rail 50b side has the same configuration.

[0038] The openers 30 are fixed at positions along a pair of annular rails 50a, and a plurality of openers 30 are provided along the X direction in FIG. 1. In this embodiment, three openers 30 are provided at predetermined portions of the rails 50a. As shown in FIGS. 7 to 9, the three openers 30 are arranged at offset positions so as to approach the top of the track on which the openers 30 rotate as the film F moves toward the X1 direction in which it is transported, and are fixed to the support portion 35. Specifically, one of the three openers 30 provided along the X1 direction is arranged in a state rotated about 25° clockwise from the top as it moves toward the X1 direction (see FIG. 7), the other is arranged in a state rotated about 15° clockwise from the top (see FIG. 8), and the other is arranged in the top state (see FIG. 9), in that order, at offset positions from each other. As a result, each of the multiple gripping clips 10 is rotated counterclockwise in stages while traveling in the X1 direction, thereby releasing the gripped state of the film F gripped by the gripping clips 10.

[0039] In addition, the first magnet 31 and the second magnet 32, the yoke 33, and the case 34 included in the opener 30 are the same as the first magnet 21 and the second magnet 22, the yoke 23, and the case 24 included in the closer 20, respectively, and therefore the description thereof will be omitted. Unlike the closer 20, the first magnet 31 included in the opener 30 is disposed closer to the center (center line Fs) of the film F in the Y direction than the second magnet 32. Specifically, as shown in Figs. 7 to 9, the center position (center line Fs) of the film F in the Y direction is in the Y2 direction, so the first magnet 31 is disposed on the Y2 direction side of the second magnet 32. In addition, the support portion 35 and the fastening member 36 provided near the opener 30 are configured similarly to the support portion 25 and the fastening member 26 provided near the closer 20, respectively, and therefore the description thereof will be omitted.

[0040] (Effects of this embodiment) Next, the effects of this embodiment will be described.

[0041] The clip device 100 of this embodiment includes a gripping clip 10 that grips an end of the film F in a width direction (Y direction) perpendicular to a conveying direction (X direction) in which the film F is conveyed, a closer 20 that uses magnetic force to move the gripping clip 10 in a non-contact manner so that the gripping clip 10 grips the film F, and an opener 30 that uses magnetic force to move the gripping clip 10 in a non-contact manner so that the gripping clip 10 releases the gripped state of the film F. At least one of the closer 20 and the opener 30 is a first magnet 21 and a second magnet 22, or a first magnet 23 and a second magnet 24. The magnet includes a stone 31 and a second magnet 32, and the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, are arranged above the film F, perpendicular to the plane on which the film F extends and along a plane extending in the width direction, the first magnet 21 or the first magnet 31 is arranged so that the magnetization direction is along the direction toward the grip clip 10, and the second magnet 22 or the second magnet 32 ​​is arranged so that the magnetization direction is perpendicular to the magnetization direction of the first magnet 21 or the first magnet 31 so as to concentrate the magnetic field lines M1 and M2 on the first magnet 21 or the first magnet 31 side. As a result, the second magnet 22 or the second magnet 32 ​​is arranged so as to concentrate the magnetic field lines M1 and M2 on the first magnet 21 or the first magnet 31 side, so that the magnetic force on the first magnet 21 or the first magnet 31 side is strengthened, and a strong magnetic force acts on the grip clip 10. Therefore, it is possible to shorten the time required for the operation of the grasping clip 10 compared to a case where the magnetic force acting on the grasping clip 10 is weak. As a result, it is possible to provide a clipping device 100 that can perform stable grasping operation and grasping state release operation in a small installation space even during high-speed transportation.

[0042] In this embodiment, the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32 ​​are arranged so that the polarity of the surface of the second magnet 22 or the second magnet 32 ​​facing the first magnet 21 or the first magnet 31 and the polarity of the surface of the first magnet 21 or the first magnet 31 facing the gripping clip 10 are the same polarity. As a result, the magnetic force generated from the surface of the second magnet 22 or the second magnet 32 ​​facing the first magnet 21 or the first magnet 31 and the magnetic force generated from the surface of the first magnet 21 or the first magnet 31 facing the gripping clip 10 are reinforced on the first magnet 21 or the first magnet 31 side. As a result, it is possible to provide a clip device 100 that can perform a more stable gripping operation and a gripping state release operation.

[0043] Moreover, in this embodiment, the closer 20 includes a first magnet 21 and a second magnet 22, and the first magnet 21 included in the closer 20 is disposed at a position farther from the center in the width direction (Y direction) of the film F than the second magnet 22 included in the closer 20. This allows a strong magnetic force to be generated in the gripping clip 10 at a position farther from the center in the width direction (Y direction) of the film F. As a result, the gripping clip 10 can be moved to a position farther from the center in the width direction (Y direction) of the film F to grip the film F.

[0044] In addition, in this embodiment, in a configuration in which the closer 20 includes the first magnet 21 and the second magnet 22, the opener 30 preferably includes the first magnet 31 and the second magnet 32, and the first magnet 31 included in the opener 30 is disposed at a position closer to the center in the width direction of the film F than the second magnet 32 ​​included in the opener 30. This allows a strong magnetic force to be generated in the gripping clip 10 at a position closer to the center in the width direction (Y direction) of the film F. As a result, the gripping clip 10 can be moved to a position closer to the center in the width direction (Y direction) of the film F to perform an operation to release the gripped state of the film F.

[0045] In this embodiment, the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, are arranged so that the surface of the first magnet 21 or the first magnet 31 facing the gripping clip 10 and the surface of the second magnet 22 or the second magnet 32 ​​facing the gripping clip 10 are flush with each other. This causes the magnetic field lines M1 generated from the second magnet 22 or the second magnet 32 ​​to run along the magnetic field lines M2 generated from the first magnet 21 or the first magnet 31. As a result, the magnetic force acting on the gripping clip 10 can be further strengthened.

[0046] In addition, in this embodiment, the closer 20 and the opener 30 are arranged on the opposite side of the gripping clip 10 with respect to the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, and further include a yoke 23 or a yoke 33 through which the magnetic field lines M1 of the first magnet 21 and the second magnet 22, or the first magnet 31 and the magnetic field lines M2 of the second magnet 32 ​​pass, and the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, are attached to the yoke 23 or the yoke 33, arranged so that the surface of the first magnet 21 or the first magnet 31 facing the yoke 23 or the yoke 33 and the surface of the second magnet 22 or the second magnet 32 ​​facing the yoke 23 or the yoke 33 are on the same plane. As a result, the face of the first magnet 21 or 31 facing the yoke 23 or 33 and the face of the second magnet 22 or 32 facing the yoke 23 or 33 are on the same plane, so that the first magnet 21 or 31 and the second magnet 22 or 32 can be easily attached to the yoke 23 or 33.

[0047] [Variations] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications (variations) within the meaning and scope of the claims.

[0048] For example, in the present embodiment, an example has been shown in which the object to be gripped by the gripping clip 10 is the film F made of PET resin, but the present invention is not limited to this. In the present invention, the object to be gripped may be a film other than PET resin, or a resin sheet other than a film or a carbon fiber sheet.

[0049] In the present embodiment, three closers 20 and three openers 30 are provided along the X direction on each of the pair of annular rails 50a and 50b, but the present invention is not limited to this. In the present invention, one or two closers 20 and three openers 30 may be provided along the X direction on each of the pair of annular rails 50a and 50b, or four or more closers 20 and three openers 30 may be provided in different numbers.

[0050] In addition, in the present embodiment, an example has been shown in which at least head 11a of lever portion 11 in gripping clip 10 is made of a magnetic metal material (SUS430), but the present invention is not limited to this. In the present invention, head 11a of lever portion 11 in gripping clip 10 may be made of any magnetic metal material and is not limited to SUS430. Furthermore, the entire gripping clip 10 may be made of a magnetic metal material.

[0051] In the present embodiment, the gripping clip 10 clamps and grips the film F in a state where the closer 20 has rotated about 30° from the top of the rotational path, but the present invention is not limited to this. In the present invention, the position of the closer 20 when the gripping clip 10 grips the film F may be appropriately set in accordance with the shape of the gripping clip 10.

[0052] In the present embodiment, an example is shown in which the N pole of the first magnet 21 or the N pole of the first magnet 31 is provided so as to face the gripping clip 10 in close proximity, and the N pole of the second magnet 22 or the N pole of the second magnet 32 ​​is provided so as to face the first magnet 21 or the first magnet 31 and to be perpendicular to the magnetization direction of the first magnet 21 or the first magnet 31, but the present invention is not limited to this. In the present invention, the S pole of the first magnet 21 or the S pole of the first magnet 31 may be provided so as to face the gripping clip 10, and the S pole of the second magnet 22 or the S pole of the second magnet 32 ​​may be provided so as to face the first magnet 21 or the first magnet 31 and to be perpendicular to the magnetization direction of the first magnet 21 or the first magnet 31.

[0053] In addition, in the present embodiment, the first magnet 21, the second magnet 22, the first magnet 31, and the second magnet 32 ​​are rare earth magnets and neodymium magnets, but the present invention is not limited to this. In the present invention, the first magnet 21, the second magnet 22, the first magnet 31, and the second magnet 32 ​​may be rare earth magnets other than neodymium magnets, or may be magnets that are not rare earth magnets, such as electromagnets.

[0054] In the present embodiment, an example has been shown in which one each of the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32 ​​are provided in each of the closer 20 and the opener 30, but the present invention is not limited to this. In the present invention, a plurality of second magnets 22 or second magnets 32 may be provided, as in the modified example shown in FIG. 10 in which the case 24 or the case 34 is omitted. Also, a plurality of first magnets 21 or first magnets 31 may be provided.

[0055] In addition, in the present embodiment, an example has been shown in which closer 20 and opener 30 each rotate about an axis along the X direction in which film F is transported so as to follow arch-shaped support portion 25 or support portion 35, but the present invention is not limited to this. In the present invention, closer 20 and opener 30 may be fixed to non-arch-shaped support portion 25 or support portion 35, or closer 20 and opener 30 may be moved in position and fixed without rotating.

[0056] In addition, in the present embodiment, the closer 20 and the opener 30 each include both the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, but the present invention is not limited to this. In the present invention, only one of the closer 20 and the opener 30 may be configured to include the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32.

[0057] In addition, in the present embodiment, an example has been shown in which the first magnet 21 of the closer 20 is disposed at a position farther away from the center (center line Fs) in the Y direction of the film F than the second magnet 22, but the present invention is not limited to this. In the present invention, the first magnet 21 of the closer 20 may be disposed at a position closer to the center (center line Fs) in the Y direction of the film F than the second magnet 22. In that case, it is preferable to fix the closer 20 at a position further away from the top of the track on which the closer 20 rotates compared to the present embodiment.

[0058] In addition, in the present embodiment, an example has been shown in which the first magnet 31 of the opener 30 is disposed closer to the center (center line Fs) in the Y direction of the film F than the second magnet 32, but the present invention is not limited to this. In the present invention, the first magnet 31 of the opener 30 may be disposed farther from the center (center line Fs) in the Y direction of the film F than the second magnet 32. In that case, it is preferable to fix the opener 30 at a position closer to the top of the orbit on which the opener 30 rotates than in the present embodiment.

[0059] In addition, in the present embodiment, the first magnet 21 and the second magnet 22 are arranged such that the surface 21a of the first magnet 21 facing the gripping clip 10 and the surface 22a of the second magnet 22 facing the gripping clip 10 are flush with each other, but the present invention is not limited to this. In the present invention, the surface 21a of the first magnet 21 facing the gripping clip 10 and the surface 22a of the second magnet 22 facing the gripping clip 10 may be configured so as not to be flush with each other.

[0060] In addition, in the present embodiment, an example has been shown in which the closer 20 and the opener 30 include the yoke 23 or the yoke 33, but the present invention is not limited to this. In the present invention, the closer 20 and the opener 30 may be configured not to include the yoke 23 or the yoke 33.

[0061] In the present embodiment, the yoke 23 or yoke 33 is provided only on the surface of the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, opposite the gripping clip 10, but the present invention is not limited to this. In the present invention, the yoke 23 or yoke 33 may be provided so as to cover all surfaces of the first magnet 21 and the second magnet 22, or the first magnet 31 and the second magnet 32, except for the surface adjacent to the gripping clip 10.

[0062] In addition, in the present embodiment, the first magnet 21 and the second magnet 22 are attached to the yoke 23 by being arranged such that the surface 21b of the first magnet 21 facing the yoke 23 and the surface 22b of the second magnet 22 facing the yoke 23 are flush with each other, but the present invention is not limited to this. In the present invention, the first magnet 21 and the second magnet 22 may be configured to be attached to the yoke 23 without being arranged such that the surface 21b of the first magnet 21 facing the yoke 23 and the surface 22b of the second magnet 22 facing the yoke 23 are flush with each other.

[0063] In addition, in the present embodiment, the closer 20 and the opener 30 are provided at a distance of 5 mm from the head 11a of the gripping clip 10, but the present invention is not limited to this. In the present invention, the distance between the closer 20 and the opener 30 and the head 11a of the gripping clip 10 may be any distance as long as the magnetic force required to rotate the gripping clip 10 is applied. [Explanation of symbols]

[0064] 10. Grasping Clip 11 Lever section 12 Gripping part 20 Closer (clip gripping operation drive unit) 21, 31 First magnet 22, 32 Second magnet 23, 33 York 30 Opener (clip release drive unit) 100 Clip device 200 width stretching device F Film (sheet-like material) M1, M2 magnetic field lines

Claims

1. a gripping clip configured to grip an end portion of the sheet-like material in a width direction perpendicular to a conveying direction in which the sheet-like material is conveyed; a clip gripping operation drive unit that uses a magnetic force to move the gripping clip in a non-contact manner so that the gripping clip grips the sheet-like material; a clip release operation drive unit that uses a magnetic force to move the gripping clip in a non-contact manner so as to release the gripping state of the sheet-like object, At least one of the clip gripping operation drive unit and the clip releasing operation drive unit includes a first magnet and a second magnet, The first magnet and the second magnet are arranged above the sheet-like object, perpendicular to a plane along which the sheet-like object extends, and aligned along a plane extending in the width direction, The first magnet is arranged such that its magnetization direction is along a direction toward the gripping clip, A clipping device, wherein the second magnet is arranged so that its magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate magnetic field lines toward the first magnet.

2. The clip device of claim 1, wherein the first magnet and the second magnet are arranged so that the polarity of the surface of the second magnet facing the first magnet is the same as the polarity of the surface of the first magnet facing the gripping clip.

3. The clip gripping operation drive unit includes the first magnet and the second magnet, The clip device according to claim 2, wherein the first magnet included in the clip gripping operation drive unit is positioned farther from the center of the width direction of the sheet-like material than the second magnet included in the clip gripping operation drive unit.

4. The clip release operation drive unit includes the first magnet and the second magnet, The clip device according to claim 3 , wherein the first magnet included in the clip release operation drive unit is positioned closer to the center of the width direction of the sheet-like material than the second magnet included in the clip release operation drive unit.

5. The clip device of claim 1, wherein the first magnet and the second magnet are arranged so that a surface of the first magnet facing the gripping clip and a surface of the second magnet facing the gripping clip are flush with each other.

6. The clip gripping operation drive unit and the clip release operation drive unit are arranged on the opposite side of the gripping clip with respect to the first magnet and the second magnet, and further include a yoke through which magnetic field lines of the first magnet and the second magnet pass, The clip device of claim 5, wherein the first magnet and the second magnet are attached to the yoke such that the surface of the first magnet facing the yoke and the surface of the second magnet facing the yoke are coplanar.

7. a gripping clip configured to grip an end portion of the sheet-like material in a width direction perpendicular to a conveying direction in which the sheet-like material is conveyed; a clip gripping operation drive unit that uses a magnetic force to move the gripping clip in a non-contact manner so that the gripping clip grips the sheet-like material; a clip release operation drive unit that uses a magnetic force to move the gripping clip in a non-contact manner so as to release the gripping state of the sheet-like object, At least one of the clip gripping operation drive unit and the clip releasing operation drive unit includes a first magnet and a second magnet, The first magnet and the second magnet are arranged above the sheet-like object, perpendicular to a plane along which the sheet-like object extends, and aligned along a plane extending in the width direction, The first magnet is arranged such that its magnetization direction is along a direction toward the gripping clip, the second magnet is disposed so that its magnetization direction is perpendicular to the magnetization direction of the first magnet so as to concentrate magnetic field lines on the first magnet side; The gripping clip is configured to grip the sheet-like material and move in the width direction away from the center of the sheet-like material in the width direction, thereby extending the width of the sheet-like material.

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