Web transport device
The web transport device addresses interference issues by moving holding mechanisms linearly or perpendicularly to the web direction, ensuring smooth path switching and efficient handling of diverse web types, including high-tension and warped webs.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- DAI NIPPON PRINTING CO LTD
- Filing Date
- 2024-02-01
- Publication Date
- 2026-07-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing web conveyance devices face interference issues between clamp-type holding mechanisms and other components during path switching due to their thickness, making them unsuitable for high-tension conveying and warped webs, especially when rotating.
A web transport device with a switching device that moves clamp-type holding mechanisms in a linear direction non-parallel or perpendicular to the web transport direction, avoiding interference by retracting cutting and joining devices to clear the path during switching.
The solution effectively prevents interference between holding mechanisms and other components, enabling smooth path switching and efficient handling of various web types, including high-tension and warped webs, without the need for rotating mechanisms.
Smart Images
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Abstract
Description
Technical Field
[0001] The present disclosure relates to a web conveyance device and a web conveyance method.
Background Art
[0002] A web conveyance device that conveys a web unwound from a raw roll is known. The web conveyance device includes, for example, a defective portion removing device that removes defective portions from a web such as a plastic film or a metal film.
[0003] The web conveyance device includes a raw roll shaft, a first winding shaft, and a second winding shaft. The web conveyance device winds the web unwound from the raw roll held on the raw roll shaft around the first winding shaft or the second winding shaft. For example, the non-defective product of the web that does not include a defective portion is wound around the first winding shaft, and the defective product of the web that includes a defective portion is wound around the second winding shaft. The switching of the conveyance path of the web is performed by a switching device. When switching the conveyance path of the web, the switching device moves a holding mechanism that holds the web.
[0004] In a general web conveyance device, the switching device is a rotary switching device that rotates and moves the holding mechanism. In the rotary switching device, when the thickness of the holding mechanism main body is large, there is a problem that the holding mechanism interferes with other members when rotating, for example, another holding mechanism arranged upstream of the holding mechanism. To avoid this problem, an adsorption type holding mechanism that adsorbs and holds the web and has a relatively thin thickness of the holding mechanism main body is used as the holding mechanism.
[0005] However, suction-type holding mechanisms are functionally insufficient for flattening stiff webs and are unsuitable for high-tension conveying, warped webs, or conveying multiple webs of different widths on the same line. For this reason, clamp-type holding mechanisms that grip and hold the web are more appropriate, but it is difficult to reduce the thickness of the clamp-type holding mechanism body, and as mentioned above, it interferes with other components when rotating. For this reason, it is difficult to adopt clamp-type holding mechanisms as the holding mechanism in general web conveying equipment. [Prior art documents] [Patent Documents]
[0006] [Patent Document 1] Japanese Patent Publication No. 2006-27814 [Patent Document 2] Japanese Patent Publication No. 2004-244200 [Patent Document 3] Patent No. 3108193 [Patent Document 4] Japanese Patent Application Publication No. 2-95658 [Overview of the Initiative] [Problems that the invention aims to solve]
[0007] The present disclosure aims to provide a web transport device and a web transport method that can avoid interference between the clamp-type holding mechanism and other components when switching the web transport path. [Means for solving the problem]
[0008] One embodiment of the present disclosure relates to the following [1] to
[16] .
[0009] [1] A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, and a second holding mechanism that grips and holds the web in the second transport path. The switching device is a web transport device that, when switching the transport path, moves the first holding mechanism and the second holding mechanism in a linear direction non-parallel to the transport direction of the web.
[0010] [2] A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, and a second holding mechanism that grips and holds the web in the second transport path. The switching device is a web transport device that, when switching the transport path, moves the first holding mechanism and the second holding mechanism in a direction perpendicular to the transport direction of the web.
[0011] [3] The web transport device according to [1] or [2], wherein the holding mechanism includes a third holding mechanism that grips and holds the web upstream of the first holding mechanism and the second holding mechanism.
[0012] [4] The web conveying device according to [3], comprising a cutting device for cutting the web between the third holding mechanism, the first holding mechanism, and the second holding mechanism.
[0013] [5] The web conveying device according to [4], comprising a first joining device for joining the web between the third holding mechanism, the first holding mechanism, and the second holding mechanism.
[0014] [6] The cutting device and the first joining device according to [5], when the switching device moves the first holding mechanism and the second holding mechanism, retreat to positions where they do not interfere with the first holding mechanism and the second holding mechanism.
[0015] [7] Comprising a second joining device for joining the web in the first conveying path. The first joining device joins the web from the first surface. The second joining device joins the web from the second surface opposite to the first surface, the web conveying device according to [5] or [6].
[0016] [8] The holding mechanism includes a fixed plate and a support plate for supporting the web, the support plate moving towards the fixed plate to sandwich the web between the fixed plate and itself, the web conveying device according to any one of [1] to [7].
[0017] [9] The support plate includes a clamping portion for clamping the web facing the fixed plate together with the fixed plate, and a working table portion for performing operations on the web, the web conveying device according to [8].
[0018]
[10] The fixed plate is made of an elastic material. The support plate is made of a metal material, the web conveying device according to [9].
[0019]
[11] The fixed plate is made of an elastic material. The clamping portion is made of an elastic material. The web transport device according to [9], wherein the workbench portion is made of metal material.
[0020]
[12] A workbench provided adjacent to the support plate for performing work on the web, The aforementioned fixing plate is made of an elastic material, The support plate is made of an elastic material, The web transport device described in [8], wherein the workbench is made of metal material.
[0021]
[13] comprising a detection device for detecting marks provided on the web, The web transport device according to any one of [1] to
[12] , wherein the switching device switches the transport path based on the detection result of the detection device.
[0022]
[14] The web transport device according to any one of [1] to
[13] , wherein the web is composed of a laminate including a metal layer.
[0023]
[15] A first transport process in which the web unwound from the raw material roll is transported along a first transport path toward the first winding shaft, In the first transport path, a first holding step is performed in which the web is held by a first holding mechanism, A switching step of switching the transport path of the web from the first transport path to a second transport path leading to the second winding shaft, In the second transport path, a second holding step is performed in which the web is held by a second holding mechanism, This includes a second transport step of transporting the web along the second transport path, A web transport method comprising moving the first holding mechanism and the second holding mechanism in a linear direction non-parallel to the web transport direction during the switching step.
[0024]
[16] A first transport process in which the web unwound from the raw material roll is transported along a first transport path toward the first winding shaft, In the first transport path, a first holding step is performed in which the web is held by a first holding mechanism, A switching step of switching the transport path of the web from the first transport path to a second transport path leading to the second winding shaft, In the second transport path, a second holding step is performed in which the web is held by a second holding mechanism, This includes a second transport step of transporting the web along the second transport path, A web transport method comprising moving the first holding mechanism and the second holding mechanism in a direction perpendicular to the web transport direction during the switching step. [Effects of the Invention]
[0025] According to this disclosure, when switching the web transport path, the clamp-type holding mechanism can avoid interfering with other components. [Brief explanation of the drawing]
[0026] [Figure 1] This is a schematic diagram showing a web transport device according to one embodiment. [Figure 2] This is a schematic diagram showing an enlarged view of the area surrounding the switching device and holding mechanism in Figure 1. [Figure 3] This is a schematic diagram showing a further enlargement of the holding mechanism in Figure 2. [Figure 4] Figure 3 is a schematic diagram showing the holding mechanism in a state where it is holding the web. [Figure 5] This is a schematic diagram illustrating an example of a defect detection process. [Figure 6] This is a schematic diagram illustrating a web transport method according to one embodiment. [Figure 7] This is a schematic diagram illustrating a web transport method according to one embodiment. [Figure 8] This is a schematic diagram illustrating a web transport method according to one embodiment. [Figure 9] This is a schematic diagram illustrating a web transport method according to one embodiment. [Figure 10]This is a schematic diagram illustrating a web transport method according to one embodiment. [Figure 11] This is a schematic diagram showing a rotary switching device that rotates a clamp-type holding mechanism. [Figure 12] This is a schematic diagram showing the rotation of the holding mechanism in Figure 11. [Figure 13] This is a schematic diagram showing a rotary switching device that rotates a suction-type holding mechanism. [Figure 14] Figure 13 is a schematic diagram showing the rotation of the holding mechanism. [Figure 15] Figure 3 is a schematic diagram showing a modified example of the holding mechanism. [Figure 16] This is a schematic diagram showing another modified example of the holding mechanism in Figure 3. [Modes for carrying out the invention]
[0027] An embodiment of this disclosure will be described below with reference to the drawings. The embodiment shown below is an example of this disclosure and this disclosure shall not be construed as limited thereto. In this specification, terms such as “substrate,” “sheet,” and “film” are not distinguished from one another based solely on differences in designation. For example, “substrate” is a concept that includes members that may be called sheets or films. “Surface” refers to a surface that coincides with the planar direction of a plate-shaped member when the plate-shaped member is viewed as a whole and in a broad sense. The normal direction used for a plate-shaped member refers to the normal direction to the surface of the member. In this specification, terms such as “parallel,” “orthogonal,” and “straight,” as well as values of length and angle, which specify shape, geometric conditions, and their degree, shall not be bound by strict meaning, but shall be interpreted to include a range to which similar functions can be expected.
[0028] In this specification, when multiple candidate upper and lower limits are given for a certain parameter, the numerical range of that parameter may be constructed by combining any one candidate upper limit and any one candidate lower limit. For example, consider the case where it is stated that "Parameter B is, for example, A1 or greater, and may be A2 or greater, and may be A3 or greater. Parameter B is, for example, A4 or less, and may be A5 or less, and may be A6 or less." In this case, the numerical range of parameter B may be A1 or greater and A4 or less, A1 or greater and A5 or less, and A1 or greater and A6 or less. Also, the numerical range of parameter B may be A2 or greater and A4 or less, A2 or greater and A5 or less, and A2 or greater and A6 or less. Also, the numerical range of parameter B may be A3 or greater and A4 or less, A3 or greater and A5 or less, and A3 or greater and A6 or less.
[0029] In the drawings referenced in this embodiment, identical or similar reference numerals are used to denote identical parts or parts with similar functions, and repeated descriptions may be omitted. Furthermore, the dimensional ratios in the drawings may differ from the actual ratios for illustrative purposes, and some components may be omitted from the drawings.
[0030] A web transport device 1 according to one embodiment of the present disclosure will be described with reference to Figures 1 to 5. Figure 1 is a schematic diagram showing a web transport device 1 according to one embodiment. The web transport device 1 is a device that transports the web W unwound from the raw material roll R. The web transport device 1 may also be, for example, a defective part removal device that removes defective parts from the web W.
[0031] The web W is long. That is, the web W has a longitudinal direction and a transverse direction. The "longitudinal direction" means the direction along the longest edge of the web W when it is spread out. The "transverse direction" means the direction in which the minimum length of the web W is obtained when the web W is spread out. The longitudinal direction corresponds to the winding direction of the web W in the raw material roll R. The transverse direction corresponds to the width direction of the web W. The transverse direction may be perpendicular to the longitudinal direction. In the web conveying device 1, the web W is conveyed along the longitudinal direction. That is, the longitudinal direction corresponds to the conveying direction of the web W in the web conveying device 1. The web W also has a thickness direction. The "thickness direction" means the direction normal to the web W when it is spread out. The thickness direction is perpendicular to both the longitudinal and transverse directions.
[0032] The longitudinal dimension of the web W is, for example, 10 m or more, may be 100 m or more, or 1000 m or more. The longitudinal dimension of the web W is, for example, 10000 m or less, may be 1000 m or less, or 100 m or less. The short-side dimension of the web W is, for example, 0.03 m or more, may be 0.3 m or more, or 3 m or more. The short-side dimension of the web W is, for example, 3 m or less, may be 1 m or less, or 0.5 m or less. The thickness dimension of the web W is, for example, 4 μm or more, may be 40 μm or more, or 400 μm or more. The thickness dimension of the web W is, for example, 2000 μm or less, may be 200 μm or less, or 20 μm or less.
[0033] The web W may be composed of a laminate including a metal layer. The web W may be a packaging film having gas barrier properties. The thin metal layer included in the laminate of the web W may have a gas barrier function. The web W may be, for example, a food packaging film.
[0034] As shown in Figure 1, the web transport device 1 comprises a raw retraction shaft 3, a transport mechanism 10, a switching device 20, a holding mechanism 30, a first winding shaft 5, and a second winding shaft 7.
[0035] The raw material shaft 3 holds the raw material roll R. The raw material roll R is constructed by winding the web W into a roll shape. That is, the web W is wound around the raw material shaft 3 to form the raw material roll R.
[0036] The conveying mechanism 10 conveys the web W unwound from the raw material roll R. The conveying mechanism 10 may include a plurality of conveying rollers 11. The conveying path 12 of the web W by the conveying mechanism 10 includes a common conveying path 13, a first conveying path 14, and a second conveying path 15.
[0037] The common transport path 13 is the transport path for the web W from the raw material roll R to the holding mechanism 30 (or the cutting position by the cutting device 40, which will be described later). The web W unwound from the raw material roll R is first transported along the common transport path 13.
[0038] The first transport path 14 is the transport path for the web W from the holding mechanism 30 (or the cutting position by the cutting device 40) to the first winding shaft 5. The web W transported along the first transport path 14 moves toward the first winding shaft 5 and is then wound up by the first winding shaft 5.
[0039] The second transport path 15 is the transport path for the web W from the holding mechanism 30 (or the cutting position by the cutting device 40) to the second winding shaft 7. The web W transported along the second transport path 15 moves toward the second winding shaft 7 and is then wound up by the second winding shaft 7.
[0040] The switching device 20 switches the transport path 12 of the web W between the first transport path 14 and the second transport path 15. Figure 2 is a schematic diagram showing an enlarged view of the area around the switching device 20 and the holding mechanism 30 in Figure 1. As shown in Figure 2, the switching device 20 supports the holding mechanism 30 (the first holding mechanism 31 and the second holding mechanism 32, which will be described later).
[0041] The switching device 20 is configured to move linearly in a direction Dz that is not parallel to the web W transport direction Dw. The angle between the direction of movement Dz of the switching device 20 and the web W transport direction Dw is, for example, 75 degrees or more, may be 80 degrees or more, or may be 85 degrees or more. The angle between the direction of movement Dz of the switching device 20 and the web W transport direction Dw is, for example, 105 degrees or less, may be 100 degrees or less, or may be 95 degrees or less. The direction of movement Dz of the switching device 20 may be perpendicular to the web W transport direction Dw. The switching device 20 may be configured to move in a direction Dz perpendicular to the web W transport direction Dw.
[0042] The switching device 20 switches the transport path 12 of the web W between the first transport path 14 and the second transport path 15 by moving in the direction Dz described above. When the transport path 12 of the web W is the first transport path 14, the switching device 20 switches the transport path 12 of the web W from the first transport path 14 to the second transport path 15. When the transport path 12 of the web W is the second transport path 15, the switching device 20 switches the transport path 12 of the web W from the second transport path 15 to the first transport path 14.
[0043] When switching the transport path 12 of the web W, the switching device 20 moves the first holding mechanism 31 and the second holding mechanism 32 in a linear direction Dz that is not parallel to the transport direction Dw of the web W. Alternatively, when switching the transport path 12 of the web W, the switching device 20 moves the first holding mechanism 31 and the second holding mechanism 32 in a direction Dz that is perpendicular to the transport direction Dw of the web W.
[0044] The holding mechanism 30 holds the web W by clamping it in the transport path 12 of the web W. The holding mechanism 30 is a so-called clamp-type holding mechanism. Figure 3 is a schematic diagram showing a further enlargement of the holding mechanism 30 of Figure 2. Figure 4 is a schematic diagram showing the state in which the holding mechanism 30 of Figure 3 holds the web W. As shown in Figures 3 and 4, the holding mechanism 30 includes a fixing plate 35 and a support plate 36.
[0045] The fixing plate 35 is fixed in a position facing the support plate 36. The fixing plate 35 has a width dimension that is longer than the short-side dimension of the web W.
[0046] The support plate 36 supports the web W. The support plate 36 faces the fixed plate 35. The support plate 36 is configured to be movable toward the fixed plate 35. The support plate 36 moves toward the fixed plate 35 to clamp the web W between itself and the fixed plate 35. The direction of movement of the support plate 36 may be in a direction Dz perpendicular to the transport direction Dw of the web W.
[0047] The support plate 36 may be configured to move toward the fixed plate 35 by being driven by a cylinder (not shown) housed within the holding mechanism body 37. Alternatively, the support plate 36 may be configured to move toward the fixed plate 35 by being driven by a drive motor (not shown) housed within the holding mechanism body 37. In this way, since the holding mechanism body 37 houses the cylinder, drive motor, etc., the thickness of the holding mechanism body 37 increases.
[0048] The thickness dimension a of the holding mechanism body 37 is, for example, 50 mm or more, may be 80 mm or more, or may be 100 mm or more. The thickness dimension a of the holding mechanism body 37 is, for example, 500 mm or less, may be 300 mm or less, or may be 150 mm or less.
[0049] The support plate 36 may include a clamping portion 38 and a workbench portion 39. The clamping portion 38 is the part that faces the fixed plate 35 and clamps the web W together with the fixed plate 35. The workbench portion 39 is the part for performing work on the web W. The workbench portion 39 is used, for example, as a workbench when joining the cut web W using the first joining device 41, which will be described later.
[0050] The fixing plate 35 may be made of an elastic material such as rubber. This increases the coefficient of friction of the fixing plate 35 with respect to the web W, allowing the holding mechanism 30 to firmly hold the web W. The support plate 36 may be made of a metal material such as iron or stainless steel. This prevents wrinkles from forming on the web W during work.
[0051] As shown in Figures 1 and 2, the holding mechanism 30 includes a first holding mechanism 31 and a second holding mechanism 32. The first holding mechanism 31 is located in the first transport path 14. The first holding mechanism 31 grips and holds the web W in the first transport path 14. The second holding mechanism 32 is located in the second transport path 15. The second holding mechanism 32 grips and holds the web W in the second transport path 15. As described above, the first holding mechanism 31 and the second holding mechanism 32 are supported by the switching device 20.
[0052] As shown in Figures 1 and 2, the holding mechanism 30 may include a third holding mechanism 33. The third holding mechanism 33 is located in the common transport path 13. The third holding mechanism 33 grips and holds the web W in the common transport path 13. The third holding mechanism 33 is located upstream of the first holding mechanism 31 and the second holding mechanism 32. The third holding mechanism 33 grips and holds the web W upstream of the first holding mechanism 31 and the second holding mechanism 32.
[0053] The third holding mechanism 33 may be positioned adjacent to the first holding mechanism 31 in the transport direction Dw of the web W when the transport path 12 of the web W is the first transport path 14. The third holding mechanism 33 may be positioned adjacent to the second holding mechanism 32 in the transport direction Dw of the web W when the transport path 12 of the web W is the second transport path 15.
[0054] In this case, the distance d (see Figure 3) between the third holding mechanism 33 and the first holding mechanism 31 (or second holding mechanism 32) is, for example, 0.1 mm or more, may be 0.5 mm or more, or 0.8 mm or more. The distance d is, for example, 10 mm or less, may be 5 mm or less, or 1.5 mm or less.
[0055] The first winding shaft 5 is positioned downstream of the first transport path 14. The first winding shaft 5 winds up the web W that has been transported along the first transport path 14. The first winding shaft 5 winds up and recovers the web W that has been transported along the first transport path 14. If the web transport device 1 is a defective part removal device, good quality web W that does not contain defective parts may be transported along the first transport path 14 and recovered by being wound up by the first winding shaft 5.
[0056] The second winding shaft 7 is located downstream of the second transport path 15. The second winding shaft 7 winds up the web W that has been transported along the second transport path 15. The second winding shaft 7 winds up and recovers the web W that has been transported along the second transport path 15. If the web transport device 1 is a defective part removal device, defective products including defective parts of the web W may be transported along the second transport path 15 and recovered by being wound up by the second winding shaft 7.
[0057] Furthermore, as shown in Figures 1 and 2, the web transport device 1 may also include a cutting device 40, a first joining device 41, a second joining device 42, and a detection device 50.
[0058] The cutting device 40 is positioned between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. More specifically, when the web W transport path 12 is the first transport path 14, the cutting device 40 is positioned between the third holding mechanism 33 and the first holding mechanism 31. When the web W transport path 12 is the second transport path 15, the cutting device 40 is positioned between the third holding mechanism 33 and the second holding mechanism 32.
[0059] The cutting device 40 cuts the web W between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. When the transport path 12 of the web W is the first transport path 14, the cutting device 40 cuts the web W while it is being held by the first holding mechanism 31 and the third holding mechanism 33. When the transport path 12 of the web W is the second transport path 15, the cutting device 40 cuts the web W while it is being held by the second holding mechanism 32 and the third holding mechanism 33.
[0060] The cutting device 40 may include, for example, a cutter. The cutting device 40 may cut the web W with a cutter. The cutting device 40 may include, for example, a high-power laser irradiation device. The cutting device 40 may cut the web W with high-power laser light.
[0061] The first joining device 41 is positioned between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. More specifically, the first joining device 41 is located between the third holding mechanism 33 and the first holding mechanism 31 when the transport path 12 of the web W is the first transport path 14. The first joining device 41 is located between the third holding mechanism 33 and the second holding mechanism 32 when the transport path 12 of the web W is the second transport path 15.
[0062] The first joining device 41 joins the web W between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. The first joining device 41 joins the ends of the web W that have been cut by the cutting device 40. If the transport path 12 of the web W is the first transport path 14, the first joining device 41 joins the leading end of the web W, which is held by the third holding mechanism 33, to the rear end of the web W, which is held by the first holding mechanism 31. If the transport path 12 of the web W is the second transport path 15, the first joining device 41 joins the leading end of the web W, which is held by the third holding mechanism 33, to the rear end of the web W, which is held by the second holding mechanism 32.
[0063] The first joining device 41 may include, for example, a tape application device. The first joining device 41 may join the web W by applying tape. When applying tape, the first joining device 41 may use the workbench portion 39 of the support plate 36. That is, the first joining device 41 may apply tape to the web W on the workbench portion 39 of the support plate 36.
[0064] The cutting device 40 and the first joining device 41 may be supported by a support mechanism 43. The support mechanism 43 may be configured to be movable. For example, the support mechanism 43 may be configured to be movable in a direction Dz perpendicular to the conveying direction Dw of the web W. This allows the support mechanism 43 to move the cutting device 40 and the first joining device 41 closer to or further away from the web W. For example, when cutting the web W with the cutting device 40 or joining the web W with the first joining device 41, the cutting device 40 and the first joining device 41 can be brought closer to the web W. Also, when the cutting device 40 and the first joining device 41 are not in use, they can be moved away from the web W.
[0065] Alternatively, for example, the support mechanism 43 may be configured to move in a direction Dx parallel to the conveying direction Dw of the web W. The support mechanism 43 may move in the aforementioned direction Dx when the switching device 20 moves the first holding mechanism 31 and the second holding mechanism 32. As a result, the cutting device 40 and the first joining device 41 may be retracted to a position where they do not interfere with the first holding mechanism 31 and the second holding mechanism 32 when the switching device 20 moves the first holding mechanism 31 and the second holding mechanism 32.
[0066] The second joining device 42 is located in the first transport path 14. The second joining device 42 is located downstream of the first holding mechanism 31. The second joining device 42 joins the web W in the first transport path 14. The second joining device 42 joins the portion of the web W joined by the first joining device 41 from the second surface (back side). That is, the first joining device 41 joins the web W from the first surface (front side), and the second joining device 42 joins the web W from the second surface opposite to the first surface. The second joining device 42 may join the web W while it is being held by the holding mechanism 30, which is located facing the second joining device 42. The second joining device 42 may include, for example, a tape application device. The second joining device 42 may join the web W by applying tape.
[0067] The detection device 50 is located on the common transport path 13. The detection device 50 is located upstream of the holding mechanism 30. That is, the detection device 50 is located between the raw re-shaft 3 and the holding mechanism 30. The detection device 50 detects the mark M provided on the web W. The mark M may be provided on the web W in advance in a process prior to this process in which the web W is transported by the web transport device 1. For example, the mark M may be printed on the web W by an inkjet device. The positional relationship between the mark M and the defective part B on the web W may be associated with the mark M. The association of the positional relationship between the defective part B on the web W and the mark M may be performed in the preceding defective part detection process.
[0068] Figure 5 is a schematic diagram showing an example of a defect detection process. As shown in Figure 5, in the defect detection process, a defect B on the web W is detected by an inspection camera 51 as the web W is transported in the transport direction Dw. A mark detection camera 52 also detects a mark M provided on the web W. The inspection camera 51 and the mark detection camera 52 are synchronized, and the mark detection camera 52 detects the mark M located immediately before the defect B detected by the inspection camera 51. Furthermore, an encoder 53, which is synchronized with the inspection camera 51 and the mark detection camera 52, calculates the coordinate information (X, Y) of the defect B based on the mark M detected by the mark detection camera 52. In this way, the positional relationship between the defect B and the mark M is established.
[0069] The switching device 20 may switch the transport path 12 of the web W based on the detection result of the detection device 50. That is, as described above, since the positional relationship between the defective part B and the mark M is associated in the previous process, the position of the defective part B on the web W can be determined from the mark M detected by the detection device 50. For this reason, the switching device 20 can determine the position of the defective part B on the web W from the detection result of the detection device 50, and if there is a defective part B, it can switch the transport path 12 of the web W from the first transport path 14 to the second transport path 15. As a result, good products of the web W that do not contain the defective part B can be transported to the first transport path 14 and recovered by winding up with the first winding shaft 5, and defective products of the web W that contain the defective part B can be transported to the second transport path 15 and recovered by winding up with the second winding shaft 7.
[0070] The switching of the transport route 12 by the switching device 20 may be performed automatically by a control device (not shown) or manually by an operator.
[0071] Furthermore, the web transport device 1 does not necessarily have to be equipped with one or more of the cutting device 40, the first joining device 41, the second joining device 42, and the detection device 50. For example, if the web transport device 1 does not have the cutting device 40, the cutting of the web W may be performed manually by an operator. Also, for example, if the web transport device 1 does not have the first joining device 41 and the second joining device 42, the joining of the web W may be performed manually by an operator. Also, for example, if the web transport device 1 does not have the detection device 50, the detection of defective parts B on the web W may be performed by visual inspection by an operator.
[0072] Next, a web transport method according to one embodiment of the present disclosure will be described with reference to Figures 6 to 10. The web transport method is a method of transporting the web W unwound from the raw material roll R using the web transport device 1 described above. The web transport method may also be, for example, a defective part removal method that removes defective parts from the web W.
[0073] The web transport method includes a first transport step, a detection step, a first holding step, a cutting step, a switching step, a second holding step, a joining step, and a second transport step.
[0074] First, the first transport process is carried out. In the first transport process, as shown in Figure 6, the web W unwound from the raw material roll R is transported along the first transport path 14 toward the first winding shaft 5. The web W is transported by multiple transport rollers 11 of the transport mechanism 10. Here, the web W is not held by the holding mechanism 30. The web W that has been transported along the first transport path 14 is wound up by the first winding shaft 5 and recovered.
[0075] Next, a detection process is performed. In the detection process, the detection device 50 detects the marks M provided on the web W. As described above, the positional relationship between the marks M and the defective parts B on the web W is associated with each other. Therefore, the position of the defective parts B on the web W can be determined from the marks M detected by the detection device 50. In this detection process, if a mark M corresponding to the defective parts B on the web W is detected, the subsequent steps may be performed.
[0076] Next, the first holding step is performed. In the first holding step, as shown in Figure 7, the web W is held by the first holding mechanism 31 in the first transport path 14. Alternatively, the web W may be held by the third holding mechanism 33 in the common transport path 13. The holding of the web W by the first holding mechanism 31 and the holding of the web W by the third holding mechanism 33 may be performed simultaneously.
[0077] Next, a cutting process is performed. In the cutting process, as shown in Figure 7, the web W is cut between the first holding mechanism 31 and the third holding mechanism 33. The web W is held by the first holding mechanism 31 and the third holding mechanism 33 and cut by the cutting device 40. Here, the web W may be held by the first holding mechanism 31 and the third holding mechanism 33 under high tension. The web W may also be cut by the cutter of the cutting device 40 or by a high-power laser beam.
[0078] Next, a switching process is performed. In the switching process, as shown in Figure 8, the transport path 12 of the web W is switched from the first transport path 14 to the second transport path 15 that leads to the second winding shaft 7. The switching of the transport path 12 of the web W is performed by a switching device 20. As shown in Figure 8, the transport path 12 of the web W is switched from the first transport path 14 to the second transport path 15 by the switching device 20 moving in the direction Dz described above.
[0079] In the switching process, the first holding mechanism 31 and the second holding mechanism 32 are moved in the direction Dz described above. That is, in the switching process, the first holding mechanism 31 and the second holding mechanism 32 are moved linearly in a direction Dz that is not parallel to the conveying direction Dw of the web W. Alternatively, the first holding mechanism 31 and the second holding mechanism 32 are moved in a direction Dz that is perpendicular to the conveying direction Dw of the web W.
[0080] The switching process may include a retraction process. In the retraction process, as shown in Figure 8, the cutting device 40 and the first joining device 41 are retracted to a position where they do not interfere with the first holding mechanism 31 and the second holding mechanism 32. The support mechanism 43 may move in a direction Dx parallel to the conveying direction Dw of the web W, thereby retracting the cutting device 40 and the first joining device 41 to a position where they do not interfere with the first holding mechanism 31 and the second holding mechanism 32.
[0081] Next, the joining process is carried out. In the joining process, as shown in Figure 9, the web W is joined between the second holding mechanism 32 and the third holding mechanism 33. At this point, the cutting device 40 and the first joining device 41 move from the retracted position back to their original positions (working positions). The web W is joined by the first joining device 41 while being held by the second holding mechanism 32 and the third holding mechanism 33. The first joining device 41 may join the leading edge of the web W, which is held by the third holding mechanism 33, to the rear end of the web W, which is held by the second holding mechanism 32. The web W may also be joined by the first joining device 41 by applying tape to the workbench portion 39 of the support plate 36.
[0082] Next, the second transport process is carried out. In the second transport process, as shown in Figure 10, the web W is transported along the second transport path 15. The web W is transported by multiple transport rollers 11 of the transport mechanism 10. Here, the web W is not held by the holding mechanism 30. That is, when the second transport process is carried out, the holding of the web W by the second holding mechanism 32 and the third holding mechanism 33 is released. The web W that has been transported along the second transport path 15 is wound up by the second winding shaft 7 and recovered.
[0083] Subsequently, the transport path 12 of the web W may be switched from the second transport path 15 to the first transport path 14 using the same method. Next, the web W may be joined between the first holding mechanism 31 and the third holding mechanism 33 by the first joining device 41. Then, downstream of the first holding mechanism 31 on the first transport path 14, the portion joined by the first joining device 41 may be joined from the second surface (back side) by the second joining device 42. That is, the web W may be joined from the first surface (front side) by the first joining device 41, and then joined from the second surface opposite to the first surface by the second joining device 42. Then, the process may return to the first transport step described above and repeat each of the above steps.
[0084] Next, the effects and advantages of this embodiment will be described.
[0085] In a typical web transport device, as shown in Figure 11, the switching device 20' is a rotary switching device that moves the holding mechanism 30 by rotating it. The rotary switching device 20' has a first arm 21' that supports the first holding mechanism 31 and a second arm 22' that supports the second holding mechanism 32. The first arm 21' and the second arm 22' are each pivotally supported on a rotation axis 23'. The first arm 21' and the second arm 22' have the same length. When switching the web transport path, the rotary switching device 20' rotates the first arm 21' and the second arm 22' by an angle θ about the rotation axis 23', thereby rotating the first holding mechanism 31 and the second holding mechanism 32. Here, the angle θ is the angle between the first arm 21' and the second arm 22'.
[0086] However, when such a rotating switching device 20' rotates a clamp-type holding mechanism 30, the holding mechanism 30 may interfere with other components during rotation, as shown in Figure 12. In the example shown in Figure 12, the first holding mechanism 31 supported by the first arm 21' interferes (collides) with the third holding mechanism 33, which is located adjacent to the first holding mechanism 31, during rotation.
[0087] Interference of the holding mechanism 30 in the rotating switching device 20' is affected by the thickness of the holding mechanism body 37. In other words, such interference can occur when the thickness of the holding mechanism body 37 is thick. The conditions for the holding mechanism 30 not to interfere in the rotating switching device 20' are expressed by the following (Equation 1).
[0088]
number
[0089] Here, L represents the distance from the rotation axis 23' to the end of the holding mechanism 30 (first holding mechanism 31 or second holding mechanism 32) (the end located on the opposite side from the rotation axis 23'). a represents the thickness dimension of the holding mechanism body 37. d represents the distance between the third holding mechanism 33 and the first holding mechanism 31 (or second holding mechanism 32). The position where the first arm 21' and the second arm 22' support the holding mechanism 30 is the center position in the thickness direction of the holding mechanism body 37.
[0090] Solving (Equation 1) above for a yields (Equation 2) below.
[0091]
number
[0092] In equation (2), for example, if L = 300 mm and d = 1 mm, then a < 49 mm. Since the clamp-type holding mechanism 30 has a cylinder and motor inside the holding mechanism body 37, it is difficult to reduce the thickness of the holding mechanism body 37, and even a thin type has a thickness dimension a of about 80 mm. For this reason, the clamp-type holding mechanism 30 cannot satisfy the conditions of equation (2) above.
[0093] Therefore, in a typical web transport device, a suction-type holding mechanism 30' is used as the holding mechanism, as shown in Figure 13. The suction-type holding mechanism 30' holds the web W by adsorption through a plurality of suction holes provided in the holding mechanism body 37'. Since the suction-type holding mechanism 30' does not have a cylinder or motor inside the holding mechanism body 37', it is possible to reduce the thickness of the holding mechanism body 37'. Therefore, as shown in Figure 14, interference between the holding mechanism 30' and other components during rotation can be avoided. In the example shown in Figure 14, interference between the first holding mechanism 31' and the second holding mechanism 32' and the third holding mechanism 33 during rotation is avoided.
[0094] However, the suction-type holding mechanism 30' is functionally insufficient for flattening stiff webs and is not suitable for high-tension conveying, webs that warp, or situations where multiple webs of different widths are conveyed on the same line.
[0095] In contrast, according to this embodiment, when the switching device 20 switches the transport path 12 of the web W, it moves the first holding mechanism 31 and the second holding mechanism 32 in a linear direction Dz that is not parallel to the transport direction Dw of the web W. Alternatively, when the switching device 20 switches the transport path 12 of the web W, it moves the first holding mechanism 31 and the second holding mechanism 32 in a direction Dz that is perpendicular to the transport direction Dw of the web W. As a result, even if a clamp-type holding mechanism 30 with a thick holding mechanism body 37 is used as the holding mechanism in the web transport device 1, interference between the clamp-type holding mechanism 30 and other components can be avoided when switching the transport path 12 of the web W. For this reason, a clamp-type holding mechanism 30 can be used as the holding mechanism in the web transport device 1.
[0096] Furthermore, according to this embodiment, by using a clamp-type holding mechanism 30, the web W can be held with high tension, making it possible to hold even a stiff web W in a flattened manner. In addition, because the web W can be held with high tension, there is no need to reduce the tension of the web W during holding, and high-tension transport of the web W becomes possible. As a result, the web W can be transported without meandering, and the winding quality of the web W can also be improved.
[0097] Furthermore, in the suction-type holding mechanism 30', if a web W is warped, the end of the web W may curl and lift up when cut, making it impossible to hold the web W. Also, in scenarios where multiple webs W of different widths are transported on the same line, if a web W with a web width smaller than the suction width (the width of the suction holes) is transported, the holding force of the suction-type holding mechanism 30' may decrease significantly. In contrast, according to this embodiment, by using a clamp-type holding mechanism 30, it becomes possible to hold the web W even in scenarios where a web W is warped or where multiple webs W of different widths are transported on the same line.
[0098] Furthermore, according to this embodiment, the holding mechanism 30 includes a third holding mechanism 33 that grips and holds the web W upstream of the first holding mechanism 31 and the second holding mechanism 32. As a result, the web W can be firmly held by the two holding mechanisms 30, the third holding mechanism 33 and the first holding mechanism 31 or the second holding mechanism 32, and the web W can be held with high tension.
[0099] Furthermore, according to this embodiment, the web transport device 1 includes a cutting device 40 that cuts the web W between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. This allows the web W to be quickly cut by the cutting device 40 when switching the transport path 12 of the web W. Therefore, the transport path 12 of the web W can be quickly switched.
[0100] Furthermore, according to this embodiment, the web transport device 1 includes a first joining device 41 that joins the web W between the third holding mechanism 33 and the first holding mechanism 31 and the second holding mechanism 32. This allows the cut web W to be quickly joined by the first joining device 41 after the transport path 12 of the web W is switched. Therefore, after the transport path 12 of the web W is switched, the web W can be quickly transported toward the first winding shaft 5 or the second winding shaft 7.
[0101] Furthermore, according to this embodiment, the cutting device 40 and the first joining device 41 are retracted to a position where they do not interfere with the first holding mechanism 31 and the second holding mechanism 32 when the switching device 20 moves the first holding mechanism 31 and the second holding mechanism 32. This makes it possible to avoid interference between the first holding mechanism 31 and the second holding mechanism 32 and the cutting device 40 and the first joining device 41 when switching the transport path 12 of the web W.
[0102] Furthermore, according to this embodiment, the web transport device 1 includes a second joining device 42 that joins the web W in the first transport path 14. The first joining device 41 joins the web W from a first surface, and the second joining device 42 joins the web W from a second surface opposite to the first surface. This improves the joining strength of the web W and prevents the web W from coming apart.
[0103] Furthermore, according to this embodiment, the support plate 36 of the holding mechanism 30 includes a workbench portion 39 for performing work on the web W. In this way, the holding mechanism 30 can also serve as a workbench for, for example, joining work by the first joining device 41.
[0104] Furthermore, according to this embodiment, the fixing plate 35 of the holding mechanism 30 is made of an elastic material. This allows the coefficient of friction of the fixing plate 35 with respect to the web W to be increased, and the holding mechanism 30 can firmly hold the web W. In addition, the support plate 36 of the holding mechanism 30 is made of a metal material. This suppresses the occurrence of wrinkles in the web W when working on the workbench 39 by the first joining device 41, etc.
[0105] Furthermore, according to this embodiment, the web transport device 1 is equipped with a detection device 50 that detects a mark M provided on the web W, and the switching device 20 switches the transport path 12 of the web W based on the detection result of the detection device 50. Since the positional relationship between the mark M and the defective part B on the web W can be associated, the position of the defective part B on the web W can be determined from the mark M detected by the detection device 50. As a result, the switching device 20 can determine the position of the defective part B on the web W from the detection result of the detection device 50, and if there is a defective part B, it can switch the transport path 12 of the web W from the first transport path 14 to the second transport path 15. Therefore, good products of the web W that do not contain the defective part B can be transported to the first transport path 14 and recovered by winding up with the first winding shaft 5, and defective products of the web W that contain the defective part B can be transported to the second transport path 15 and recovered by winding up with the second winding shaft 7.
[0106] Furthermore, according to this embodiment, the web W is composed of a laminate including a metal layer. In particular, a web W with such a configuration is prone to warping. According to this embodiment, by using a clamp-type holding mechanism 30, even a web W that is prone to warping can be properly held.
[0107] Thus, according to this embodiment, when switching the web transport path, interference between the clamp-type holding mechanism and other components can be avoided.
[0108] The embodiment described above can be modified in various ways. Modifications will be described below with reference to the drawings as necessary. In the following description and the drawings used therein, parts that can be configured similarly to the embodiment described above will be given the same reference numerals as those used for the corresponding parts in the embodiment described above. Duplicate explanations will be omitted. Furthermore, if it is clear that the effects and advantages obtained in the embodiment described above can also be obtained in the modification, the explanation may be omitted.
[0109] Figure 15 is a schematic diagram showing a modified example of the holding mechanism 30 in Figure 3. In the example shown in Figure 3, the support plate 36 of the holding mechanism 30 was made of a metal material. However, as shown in Figure 15, the clamping portion 38 and the workbench portion 39 of the support plate 36 may be made of different materials. For example, the clamping portion 38 may be made of an elastic material and the workbench portion 39 may be made of a metal material. By making the clamping portion 38 of an elastic material, the coefficient of friction of the clamping portion 38 with respect to the web W can be increased, and the web W can be held more firmly between the clamping portion 38 and the fixing plate 35. Also, by making the workbench portion 39 of a metal material, it is possible to suppress the occurrence of wrinkles in the web W when the first joining device 41 or the like works on the workbench portion 39.
[0110] As shown in Figure 15, a portion of the workbench 39 may extend to the area facing the fixed plate 35. Also, although not shown, a portion of the clamping portion 38 may extend to an area not facing the fixed plate 35. In other words, the clamping portion 38 only needs to be a part that primarily serves to clamp the web W together with the fixed plate 35, and the workbench 39 only needs to be a part that primarily serves to perform work on the web W.
[0111] Figure 16 is a schematic diagram showing another modified example of the holding mechanism 30 of Figure 3. In the example shown in Figure 3, the support plate 36 of the holding mechanism 30 included a clamping portion 38 and a workbench portion 39. However, as shown in Figure 16, a workbench 60 for working on the web W may be provided adjacent to the support plate 36. The workbench 60 is a separate element from the support plate 36. The workbench 60 is used, for example, as a workbench when joining the cut web W by the first joining device 41.
[0112] As shown in Figure 16, one workbench 60 may be positioned adjacent to the support plate 36 of the third holding mechanism 33, and another workbench 60 may be positioned adjacent to the first holding mechanism 31 (or second holding mechanism 32). Furthermore, these workbenches 60 may be positioned between the third holding mechanism 33 and the first holding mechanism 31 (or second holding mechanism 32). That is, one workbench 60 may be positioned downstream of the third holding mechanism 33, and another workbench 60 may be positioned upstream of the first holding mechanism 31 (or second holding mechanism 32).
[0113] The workbench 60 may have a configuration similar to that of the holding mechanism 30. For example, the workbench 60 may be driven by a cylinder (not shown) or a drive motor (not shown), similar to the support plate 36, and be configured to move in the same direction as the support plate 36.
[0114] In this case, the support plate 36 of the holding mechanism 30 may be made of an elastic material, and the workbench 60 may be made of a metal material. By making the support plate 36 of an elastic material, the coefficient of friction of the support plate 36 with respect to the web W can be increased, and the web W can be held more firmly between the support plate 36 and the fixing plate 35. In addition, by making the workbench 60 of a metal material, it is possible to suppress the occurrence of wrinkles in the web W when working on the workbench section 39 by the first joining device 41, etc.
[0115] The components disclosed in the embodiments and modifications described above may be combined as appropriate as needed. [Explanation of Symbols]
[0116] 1 Web transport device 3. Original Anti-Axis 5. First scroll removal 7. Volume 2 Removal 10 Conveying mechanism 12. Transport Route 14. First transport route 15. Second transport route 20 Switching device 30 Retention mechanism 31 First holding mechanism 32 Second holding mechanism 33 Third holding mechanism 35 Fixed plate 36 Support plate 38 Clamping part 39 Workbench Section 40 Cutting device 41 1st joining device 42 Second joining device 50 Detection device 60 workbenches M mark R raw material roll W Web
Claims
1. A web transport device, A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, a second holding mechanism that grips and holds the web in the second transport path, and a third holding mechanism that grips and holds the web upstream of the first and second holding mechanisms. When switching the transport path, the switching device moves the first holding mechanism and the second holding mechanism in a linear direction that is not parallel to the transport direction of the web. The aforementioned web transport device, A cutting device for cutting the web between the third holding mechanism, the first holding mechanism and the second holding mechanism, The system further comprises a first joining device for joining the web between the third holding mechanism, the first holding mechanism, and the second holding mechanism, A web transport device wherein the cutting device and the first joining device retract to a position where they do not interfere with the first holding mechanism and the second holding mechanism when the switching device moves the first holding mechanism and the second holding mechanism.
2. A web transport device, A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, a second holding mechanism that grips and holds the web in the second transport path, and a third holding mechanism that grips and holds the web upstream of the first and second holding mechanisms. When switching the transport path, the switching device moves the first holding mechanism and the second holding mechanism in a linear direction that is not parallel to the transport direction of the web. The aforementioned web transport device, A cutting device for cutting the web between the third holding mechanism, the first holding mechanism and the second holding mechanism, A first joining device for joining the web between the third holding mechanism, the first holding mechanism and the second holding mechanism, The system further comprises a second joining device for joining the webs in the first transport path, The first joining device joins the web from the first surface, The second joining device is a web transport device that joins the web from a second surface opposite to the first surface.
3. A web transport device, A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, and a second holding mechanism that grips and holds the web in the second transport path. When switching the transport path, the switching device moves the first holding mechanism and the second holding mechanism in a linear direction that is not parallel to the transport direction of the web. The holding mechanism includes a fixed plate and a support plate that supports the web, the support plate which moves toward the fixed plate and clamps the web between itself and the fixed plate. A web transport device comprising a support plate, a clamping portion that faces the fixing plate and clamps the web together with the fixing plate, and a workbench portion for performing work on the web.
4. A web transport device, A raw material shaft that holds the raw material roll, A conveying mechanism for transporting the web unwound from the aforementioned raw material roll, A switching device that switches the transport path of the web between a first transport path and a second transport path, A holding mechanism that grips and holds the web in the aforementioned transport path, A first winding shaft for winding up the web that has been transported along the first transport path, The system comprises a second winding shaft for winding up the web that has been transported along the second transport path, The holding mechanism includes a first holding mechanism that grips and holds the web in the first transport path, and a second holding mechanism that grips and holds the web in the second transport path. When switching the transport path, the switching device moves the first holding mechanism and the second holding mechanism in a linear direction that is not parallel to the transport direction of the web. The holding mechanism includes a fixed plate and a support plate that supports the web, the support plate which moves toward the fixed plate and clamps the web between itself and the fixed plate. The web transport device is provided adjacent to the support plate and further includes a workbench for performing work on the web. The aforementioned fixing plate is made of an elastic material, The support plate is made of an elastic material, The aforementioned workbench is a web transport device made of metal material.
5. The web transport device according to claim 1, wherein the switching device moves the first holding mechanism and the second holding mechanism in a linear direction perpendicular to the transport direction of the web when switching the transport path.
6. The first transport path includes a second joining device for joining the webs, The first joining device joins the web from the first surface, The web transport device according to claim 1, wherein the second joining device joins the web from the second surface opposite to the first surface.
7. The web transport device according to claim 1 or 5, wherein the holding mechanism includes a fixed plate and a support plate that supports the web, the support plate moving toward the fixed plate and clamping the web between itself and the fixed plate.
8. The web transport device according to claim 7, wherein the support plate includes a clamping portion that faces the fixing plate and clamps the web together with the fixing plate, and a workbench portion for performing work on the web.
9. The aforementioned fixing plate is made of an elastic material, The web conveying device according to claim 8, wherein the support plate is made of a metal material.
10. The aforementioned fixing plate is made of an elastic material, The clamping portion is made of an elastic material, The web conveying device according to claim 8, wherein the workbench portion is made of a metal material.
11. A workbench is provided adjacent to the support plate for performing work on the web, The aforementioned fixing plate is made of an elastic material, The support plate is made of an elastic material, The web conveying device according to claim 7, wherein the workbench is made of a metal material.
12. The device includes a detection device that detects marks provided on the aforementioned web, The web transport apparatus according to claim 1 or 5, wherein the switching device switches the transport path based on the detection result of the detection device.
13. The web transport device according to claim 1 or 5, wherein the web is composed of a laminate including a metal layer.