JP5071156B2 - Sheet cutting apparatus and sheet cutting method - Google Patents

Description

  The present invention relates to a sheet cutting apparatus and a sheet cutting method for cutting a sheet from a supplied sheet material.

  A lithium ion secondary battery is configured by laminating a plurality of unit cells in which a separator impregnated with an electrolyte is interposed between a positive electrode and a negative electrode, and an apparatus for cutting out the separator is used in the manufacturing process (for example, , See Patent Document 1).

The apparatus described in Patent Document 1 draws a sheet material from a roll around which a sheet-like separator is wound, and holds the sheet material by sucking and holding the sheet material on the outer peripheral surface of a rectangular drum-shaped suction drum. The material is cut with a hot wire provided at the corner of the suction drum.
JP-A-2005-50583

  However, in the apparatus described in Patent Document 1 described above, since the sheet material held on the outer peripheral surface of the suction drum is cut with a heat ray provided at the corner of the suction drum, the cutting position is limited.

  Therefore, an object of the present invention is to provide a sheet cutting apparatus and a sheet cutting method capable of easily adjusting the cutting position and suppressing the occurrence of slack and wrinkles of the sheet material.

  The sheet cutting device according to the present invention that achieves the above object is a sheet cutting device for cutting a sheet from a sheet material supplied as a material. The apparatus includes a supply-side suction portion having a supply-side suction surface capable of sucking the sheet material, and a discharge-side suction surface capable of sucking the sheet material, and the sheet material is supplied in a direction more than the supply-side suction portion. An unloading side suction portion located on the downstream side. The supply side suction part and the carry-out side suction part are relatively close to and away from each other along the supply direction of the sheet material. At least one of the supply side suction part and the carry-out side suction part is formed with a lead-in part drawn in from the side close to each other along the supply direction. An extension that enters the part is formed.

  The sheet cutting method according to the present invention that achieves the above object is a sheet cutting method for cutting a sheet from a sheet material supplied as a material. The sheet cutting method includes a supply-side suction portion having a supply-side suction surface capable of sucking the sheet material, and a discharge-side suction surface capable of sucking the sheet material. A supply-side suction step for sucking the supply-side suction surface on which the sheet material is placed in a state where the carry-out side suction portion located on the downstream side in the supply direction is separated. After the supply-side suction step, the supply-side suction unit is brought close to the supply-side suction unit while the suction on the carry-out side suction surface is stopped while maintaining the suction on the supply-side suction surface. A suction part proximity step of inserting an extension part formed so as to enter the drawing part into the other part of the pair to the drawing part drawn along the supply direction from the side adjacent to at least one of the suction part and the unloading side suction part Have. After this, a carry-out suction step for starting suction of the carry-out suction surface, and the sheet material is drawn out by separating the carry-out suction portion from the supply-side suction portion in a state where the sheet material is sucked into the carry-out suction surface. A drawing step; and a cutting step of cutting the sheet material at a predetermined position in the supply direction.

  Since the sheet cutting device according to the present invention configured as described above has a structure in which the carry-out suction unit and the supply-side suction unit are relatively close to each other, cutting is performed by adjusting the length of the drawn sheet material. The position can be adjusted easily. Further, since the extension portion and the pull-in portion are formed in the supply-side suction portion and the unload-side suction portion, the supply-side suction portion and the unload-side suction portion can be closely spaced while the extension portion enters the pull-in portion, and the sheet material is loosened. Further, the sheet material can be pulled out and cut while suppressing generation of wrinkles.

  In the sheet cutting method according to the present invention configured as described above, the carrying-out suction unit and the supply-side suction unit are relatively close to each other, so that the cutting position can be easily adjusted by adjusting the length of the sheet material to be pulled out. Can be adjusted. In addition, the sheet material can be pulled out and cut while suppressing the slack of the sheet material and the generation of wrinkles, since the supply side suction unit and the carry-out side suction unit are brought close to and away from each other while the extension portion enters the drawing portion. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

<First Embodiment>
FIG. 1 is a schematic sectional view showing a preferred embodiment of a battery element of a lithium ion secondary battery, FIG. 2 is a schematic perspective view showing a sheet cutting device according to this embodiment, and FIG. 3 shows the sheet cutting device. It is a top view.

  As shown in FIG. 1, the stacked battery is, for example, a lithium ion secondary battery 1 and has a structure in which a battery element in which a charge / discharge reaction actually proceeds is enclosed in an aluminum laminate sheet 3 that is an exterior. Have. The battery element includes a positive electrode 4 in which a positive electrode active material layer containing a positive electrode active material is formed on the surface of a positive electrode current collector, an electrolyte layer 5 containing an electrolyte, and a negative electrode active material containing a negative electrode active material on the surface of the negative electrode current collector. It includes a unit cell in which a negative electrode 6 formed with a material layer is laminated in this order. The electrolyte layer 5 has a configuration in which the electrolytic solution is held by the separator P for holding the electrolytic solution. The positive electrode 4 is electrically connected to a positive electrode terminal 7 for extracting current to the outside, and the negative electrode 6 is electrically connected to a negative electrode terminal 8 for extracting current to the outside. Note that the number of single cells constituting the battery element is not particularly limited, and is appropriately determined in consideration of a desired battery capacity and battery output.

  As shown in FIGS. 2 and 3, the sheet cutting apparatus 10 according to the present embodiment includes a separator roll 11 in which a separator sheet S (sheet material), which is a material of the separator P (sheet), is wound in a roll shape. This is a device that cuts the sheet S to a predetermined size while pulling out the sheet S, and cuts the separator P. Between the separator roll 11 and the sheet cutting device 10, a rotating roll 12 that adjusts the tension while guiding the separator sheet S is provided.

  The sheet cutting device 10 includes a supply-side suction pad 13 (supply-side suction unit) and a carry-out side suction pad 14 (carry-out side suction unit) that can suck the separator sheet S to be supplied. The supply side represents the side on which the separator sheet S is supplied, and the carry-out side represents the side on which the separator sheet S is carried out.

  The supply-side suction pad 13 is fixedly connected to a frame 15 installed in the supply path of the separator sheet S, and the carry-out suction pad 14 is supplied to the frame 15 in the direction in which the separator sheet S is supplied (hereinafter referred to as the supply direction). , Simply referred to as the supply direction). The carry-out suction pad 14 is located on the downstream side (the carry-out side) in the supply direction with respect to the supply-side suction pad 13.

  The supply-side suction pad 13 has a supply-side connecting portion 16 that extends perpendicularly to the supply direction on the supply side, and four supply-side extension portions 17 that extend in parallel from the supply-side connecting portion 16 toward the carry-out side. . Out of the four supply side extensions 17, the two inner supply side extensions 17 a are supply side fixed extensions 17 a formed integrally with the supply side connecting portion 16, and the two outer supply side extensions 17 b. Is a supply-side movable extension portion 17b that can be moved back and forth perpendicularly to the supply direction toward the inner supply-side fixed extension portion 17a.

  The supply side movable extension portion 17b is slidably connected to a guide portion 19 extending perpendicularly to the supply direction in the frame body 15, and is an annular member 21 that can be rotated by, for example, a motor 20 that is a drive source provided in the frame body 15. It is connected to the outer periphery by a link 22. Therefore, by rotating the annular member 21 by the motor 20, the supply side movable extension portion 17b can move forward and backward toward the supply side fixed extension portion 17a via the link 22. A supply-side inclined portion 24 that is inclined so that the inside protrudes is formed on the distal end side (unloading side) of the supply-side movable extension portion 17b. A supply-side groove 25 that intersects the supply direction perpendicularly is formed on the distal end side of the supply-side extensions 17a and 17b.

  The mechanism for enabling the supply-side movable extension 17b to move forward and backward is not limited to the above-described structure, and may be realized using, for example, a cylinder or a link structure. Alternatively, the supply-side movable extension 17b is urged away from the supply-side fixed extension 17a by a spring, and a delivery-side extension 32, which will be described later, is brought close to the feed-side movable extension 17b so as to be pushed in by the carry-out extension 32. It is also possible to adopt a structure in which the extension portion 17b is brought close to the supply side fixed extension portion 17a.

  As described above, the supply-side suction pad 13 has a shape in which a plurality of supply-side extensions 17a and 17b extend from the supply-side connecting portion 16 in a comb shape, and between the adjacent extensions 17 between each other, A supply side lead-in part 26 that is a concave part drawn in from the carry-out side along the supply direction is formed. That is, the supply-side extension 17 and the supply-side lead-in part 26 are formed alternately in a direction perpendicular to the supply direction.

  A supply-side suction surface 27 for sucking the separator sheet S is formed on the upper surface of the supply-side suction pad 13. The supply-side suction surface 27 is formed of a porous material, the supply-side coupling portion 16 and the supply-side fixed extension portion 17a are from the lower side by the first suction tube T1, and the supply-side movable extension portion 17b is the second side from the lower side. The suction tube T2 is connected to the vacuum supply source 37. The supply-side suction surface 27 can be manufactured from various materials such as metal and resin.

  The carry-out side supply pad 14 is slidably connected to a guide portion 29 extending in the supply direction in the frame 15, and can be moved forward and backward in the supply direction by, for example, a cylinder 30 which is a drive source provided in the frame 15. Yes. The mechanism for enabling the carry-out side supply pad 14 to move forward and backward is not limited to the above-described structure, and may be realized using, for example, a motor or the like. The cylinder 30 is connected to an air supply source 39 via an air supply tube T4.

  The carry-out side supply pad 14 has a carry-out side connecting portion 31 that extends perpendicularly to the supply direction on the carry-out side, and three carry-out side extension portions 32 a and 32 b that extend in parallel from the carry-out side connecting portion 31 toward the supply side. ing. The carry-out side extension portions 32a and 32b are formed integrally with the carry-out side connection portion 31, and the outside protrudes from the distal end side (supply side) of the two outer carry-out side extension portions 32a (butting extension portions). The carry-out side inclined portion 34 that is inclined in this manner is formed. On the distal end side of the carry-out side extensions 32a and 32b, a carry-out side groove 33 that intersects the supply direction perpendicularly is formed.

  On the upper surface of the carry-out suction pad 14, a carry-out suction surface 35 for sucking the separator sheet S is formed. The carry-out suction surface 35 is made of a porous material, and is connected to the vacuum supply source 37 by a third suction tube T3 from below. The carry-out suction surface 35 can be manufactured from various materials such as metal and resin.

  As described above, the carry-out side suction pad 14 has a shape in which a plurality of carry-out side extension portions 32 extend in a comb shape from the carry-out side connection portion 31, and between the carry-out side extension portions 32, the supply side The carry-out side drawing-in part 36 which is a recessed part drawn in along the supply direction is formed. That is, the carry-out side extension portion 32 and the carry-out side drawing-in portion 36 are formed alternately in a direction perpendicular to the supply direction.

  A vacuum supply source 37 that supplies negative pressure to the supply side suction pad 13 and the carry-out side suction pad 14, a motor drive power source 38 that is connected to the motor 20 by the cable K1 and drives the motor 20, and an air supply source that drives the cylinder 30 39 is connected to a control unit 40 for controlling them.

  Next, the operation of the sheet cutting device 10 according to the present embodiment will be described.

  FIG. 4 is a plan view showing a state in which the separator sheet is held by the supply side suction pad of the sheet cutting apparatus according to the present embodiment, and FIG. 5 shows a state in which the carry-out suction pad is brought close to the supply side suction pad. FIG. 6 is a plan view showing a state in which the separator sheet is pulled out by the carry-out suction pad, and FIG. 7 is a plan view showing when the separator sheet held by the carry-out suction pad and the supply suction pad is cut. FIG. 8 is a partial plan view showing a modified example of the shapes of the tip end portions of the carry-out side extension portion and the supply side movable extension portion.

  First, as shown in FIG. 4, the separator sheet S is installed on the supply side suction surface 27 of the supply side suction pad 13, and the vacuum supply source 37 is controlled by the control unit 40 to connect the first and second suction tubes T <b> 1 and T <b> 2. Then, negative pressure is supplied to the entire surface of the supply side suction surface 27 to hold the separator sheet S by suction (supply side suction step). At this time, the supply-side movable extension 17b is close to the supply-side fixed extension 17a.

  The carry-out suction pad 14 is separated from the supply-side suction pad 13 in a state where the suction of the carry-out suction surface 35 is stopped, and the supply-side groove portion 25 and the carry-out side groove portion 33 are arranged on the same line. The carry-out side end of the separator sheet S is disposed on the supply-side groove 25 and the carry-out groove 33. At this time, the leading ends of the carry-out side extensions 32a and 32b are located under the separator sheet S.

  Next, as shown in FIG. 5, the air supply source 39 is operated by the control unit 40, and the carry-out suction pad 14 is brought close to the supply suction pad 13 by the cylinder 30 (suction part approaching step). At this time, the suction of the carry-out suction pad 14 remains stopped. As a result, the central carry-out extension 32b is inserted into the supply-side retracting portion 26 between the supply-side fixed extension 17a and 17a, and the outer carry-out extension 32a is located outside the supply-side movable extension 17b. It is inserted into the supply side lead-in part 26. Further, the supply side movable extension portion 17b is close to the supply side fixed extension portion 17a and is integrally inserted into the carry-out side drawing-in portion 36. Prior to this operation, the leading end of the carry-out extension 32 is located under the separator sheet S, so that the carry-out extension 32 can easily enter the separator sheet S without being caught by the separator sheet S. Can do.

  The distance at which the carry-out suction pad 14 is brought close to the supply-side suction pad 13 can be arbitrarily set by the control unit 40. Therefore, in FIG. 5, the carry-out suction pad 14 is as close as possible to the supply-side suction pad 13, but may be stopped halfway.

  Next, the vacuum supply source 37 is controlled by the control unit 40 to start the suction of the carry-out suction pad 14 and stop the suction of the supply-side suction pad 13 (a carry-out suction step). As a result, the separator sheet S is sucked and held on the carry-out suction surface 35.

  After that, as shown in FIG. 6, the air supply source 39 is operated by the control unit 40, and the carry-out suction pad 14 is sucked by the cylinder 30 until the supply-side groove 25 and the carry-out groove 33 are aligned on the same line. Separated from the pad 13. Thereby, the separator sheet S sucked and held by the carry-out side suction pad 14 is drawn out to the carry-out side along the supply direction (drawing step).

  In the carry-out suction step and the pull-out step, the supply of the negative pressure to the supply-side suction pad 13 may not be stopped completely, but the suction may be controlled with a weaker force than the carry-out suction pad 14. . In this way, the separator sheet S can be pulled out while being sucked by the supply side suction pad 13, so that the slackness of the separator sheet S can be reduced.

  Next, the vacuum supply source 37 is controlled by the control unit 40 to start the suction of the supply side suction pad 13 while holding the suction of the carry-out side suction pad 14 (whole suction process). Thereafter, the motor drive power supply 38 is controlled by the control unit 40 to rotate the motor 20. As a result, the annular member 21 rotates, and the supply side movable extension 17b is separated from the supply side fixed extension 17a by the link 22 connected to the outer periphery of the annular member 21, as shown in FIG. Opening process). At this time, since the separator sheet S is also sucked by the supply side movable extension portion 17b, the supply side movable extension portion 17b can be expanded while the slackness of the separator sheet S is reduced.

  When the movable extension portion expanding step is completed, the supply side movable extension portion 17b is positioned below the edge portion of the separator sheet S. The edge of the separator sheet S is the part where the slack is most likely to occur, but the lower part of the edge is held by the supply-side movable extension 17b and the unloading-side extension 32a (butt extension) so that the separator sheet S is wide. Holds in the area and is less likely to sag. At this time, the supply-side inclined portion 24 and the carry-out side inclined portion 34 are positioned to face each other, so that the supply-side inclined portion 24 and the carry-out side inclined portion 34 overlap in the supply direction, and the supply-side movable extending portion 17b and the carry-out side are overlapped. A gap between the extension portions 32a is provided to be inclined with respect to the supply direction. The gap between the supply-side movable extension 17b and the carry-out extension 32a penetrates perpendicularly to the supply direction (the supply-side movable extension 17b and the carry-out extension 32a do not overlap with the supply direction. ), The separator sheet S is liable to be slack, but in the present embodiment, it is slanted, so that it is difficult for slack to occur. Instead of providing the supply-side inclined portion 24 and the carry-out side inclined portion 34, the step portions 41a and 41b supply the leading end portions of the supply-side movable extension portion 17b and the carry-out side extension portion 32a as shown in FIG. You may form so that it may overlap with a direction perpendicularly | vertically. In the present embodiment, a gap is formed between the supply side inclined portion 24 and the carry-out side inclined portion 34, but it is also possible not to provide a gap.

  After this, the hot wire H heated by applying an electric current is lowered from above the separator sheet S onto the line where the supply side groove portion 25 and the carry-out side groove portion 33 are aligned, and the separator sheet S is cut and the separator P is cut. The hot wire H is moved upward (cutting process). At this time, since the supply-side groove portion 25 and the unload-side groove portion 33 are provided below the portion to be cut by the separator sheet S, the separator sheet S can be easily and reliably cut by the hot wire H. For cutting the separator sheet S, a cutting blade may be used instead of the hot wire H.

  In the cutting step, since the separator sheet S is sucked and held by both the supply side suction pad 13 and the carry-out side suction pad 14, the occurrence of wrinkles in the separator sheet S can be suppressed when the separator sheet S is cut. it can.

  Thereafter, the vacuum supply source 37 is controlled by the control unit 40 to stop the suction of the carry-out suction pad 14 while maintaining the suction of the supply-side suction pad 13, and the separator P is carried out from the carry-out suction pad 14 ( Unloading process).

  Further, the vacuum supply source 37 is controlled by the control unit 40 to maintain the suction of the supply side connecting portion 16 and the supply side fixed extension portion 17a by the first suction tube T1 of the supply side suction pad 13 while maintaining the second suction tube. The suction of the supply side movable extension 17b by T2 is stopped. Thereafter, the motor drive power supply 38 is controlled by the control unit 40 to rotate the motor 20 to bring the supply side movable extension 17b close to the supply side fixed extension 17a. At this time, since the suction of the supply side movable extension portion 17b is stopped, the edge portion of the separator sheet S does not move to the central portion together with the supply side movable extension portion 17b, and the occurrence of wrinkles of the separator sheet S can be reduced. At this time, since the suction of the separator sheet S by the supply side connecting portion 16 and the supply side fixing extension portion 17a of the supply side suction pad 13 is maintained, the process can be easily shifted to the step of cutting the next separator P. Then, it returns to the supply side suction process (refer FIG. 4) mentioned above, and the cutting operation of the next separator P is implemented sequentially.

  According to this embodiment, the supply side suction pad 13 and the carry-out side suction pad 14 come close to and away from each other while the extension parts 17 and 32 enter the drawing-in parts 26 and 36, so that the separator sheet S is prevented from being loosened and wrinkled. The separator P can be pulled out and cut.

  Moreover, since the length of the separator sheet S to be pulled out can be adjusted by adjusting the distance at which the carry-out suction pad 14 is brought close to the supply-side suction pad 13, the length of the separator P to be cut out can be arbitrarily changed. Therefore, various separators P having different shapes can be cut with one apparatus, and the equipment cost can be reduced.

Second Embodiment
FIG. 9 is a plan view showing a sheet cutting device according to the second embodiment. In addition, the same code | symbol is attached | subjected to the site | part which performs the same function as 1st Embodiment, and in order to avoid duplication, description is abbreviate | omitted.

  The sheet cutting device 50 according to the second embodiment is different from the sheet cutting device 10 according to the first embodiment in that the second suction side groove portion 51 different from the discharge side groove portion 33 is further provided in the discharge side suction pad 14. . The second carry-out side groove portion 51 is formed in the carry-out side extension portion 32 in parallel with the carry-out side groove portion 33.

  According to the sheet cutting device 50 according to the second embodiment, the drawn separator sheet S can be cut at two locations by two heat rays H along the carry-out side groove portion 33 and the second carry-out side groove portion 51. Therefore, a plurality of separators P can be cut and carried out simultaneously, and the workability is excellent. In addition, since a plurality of separators P can be simultaneously cut and carried out, a plurality of paths for transferring the separators P to the stacking table (not shown) for stacking with the positive electrode 4 and the negative electrode 6 can be provided. It is also possible to stack P at the same time. In addition, the cycle time can be shortened by simultaneously cutting a plurality of separators P.

  In addition, it is possible to provide three or more grooves, and in this way, it is possible to cut and carry out more separators P at the same time.

<Third Embodiment>
FIG. 10 is a plan view showing a sheet cutting device according to the third embodiment. In addition, the same code | symbol is attached | subjected to the site | part which performs the same function as 1st Embodiment, and in order to avoid duplication, description is abbreviate | omitted.

  The sheet cutting device 60 according to the third embodiment is different from the sheet cutting device 10 according to the first embodiment in that the carry-out suction pad 61 is divided in the supply direction.

  The carry-out side suction pad 61 can be divided into a first carry-out side suction pad 62 and a second carry-out side suction pad 63 having a dividing surface parallel to the carry-out side groove 33. The first carry-out suction pad 62 and the second carry-out suction pad 63 are an air cylinder 64 for moving the first and second carry-out suction pads 62 and 63 relatively forward and backward, and a stopper (non- The proximity / separation can be controlled using a spring (not shown) or the like that applies force between the first and second carry-out suction pads 62 and 63.

  According to the sheet cutting device 60 according to the third embodiment, when the first carry-out suction pad 62 and the second carry-out suction pad 63 are brought into close contact with each other, the configuration is the same as that in the first embodiment, and the separator It is suitable for cutting the separator P from the sheet S one by one. That is, since no gap is formed between the first carry-out suction pad 62 and the second carry-out suction pad 63, the occurrence of slack in the separator sheet S can be suppressed.

  Further, in the state where the first carry-out suction pad 62 and the second carry-out suction pad 63 are separated from each other, it is suitable to cut out two separators P from the separator sheet S at the same time as in the second embodiment. That is, the gap 65 between the first carry-out suction pad 62 and the second carry-out suction pad 63 serves as a groove when the separator sheet S is cut.

  Further, by controlling the distance that separates the first carry-out suction pad 62 and the second carry-out suction pad 63, the interval between the separator sheets S cut by the gap 65 and the carry-out groove 33 can be changed. . As a result, in various separators P having different shapes, it is possible to cut one sheet and change two sheets with one device 60.

  Moreover, the number of divisions of the carry-out side suction pad 61 can be three or more and can be selectively separated.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, it is not always necessary to provide a movable extension such as the supply side movable extension 17b. Further, the suction pad on the supply side can be moved with respect to the suction pad on the carry-out side. Moreover, the movable extension part which can be moved may be provided in the suction pad of the carrying-out side. Further, the groove portion does not necessarily have to be provided corresponding to the portion where the separator sheet S is cut. Also, the number of extension portions is not limited, and for example, as in the modification of the suction pad shown in FIG. 11, the supply side suction pad 71 has one extension portion 72 and the carry-out side suction pad 73 has two extension portions. 74 can be configured. Further, as in another modification example of the suction pad shown in FIG. 12, each of the supply side suction pad 81 and the carry-out side suction pad 82 may be configured to have one extension portion 83, 84 that overlaps each other. . Further, the sheet is not limited to the separator.

FIG. 1 is a schematic cross-sectional view showing a preferred embodiment of a battery element of a lithium ion secondary battery. It is a schematic perspective view which shows the sheet cutting device which concerns on 1st Embodiment. It is a top view which shows the sheet cutting device. It is a top view which shows the state which hold | maintained the separator sheet with the supply side suction pad of the sheet cutting device which concerns on this embodiment. It is a top view which shows the state which made the carrying-out side suction pad adjoin to the supply side suction pad. It is a top view which shows the state which pulled out the separator sheet with the carrying-out side suction pad. It is a top view which shows at the time of cut | disconnecting the separator sheet hold | maintained at the carrying-out side suction pad and the supply side suction pad. It is a fragmentary top view which shows the modification of the shape of the front-end | tip part of a carrying-out side extension part and a supply side movable extension part. It is a top view which shows the sheet cutting device which concerns on 2nd Embodiment. It is a top view which shows the sheet cutting device which concerns on 3rd Embodiment. It is a top view which shows the modification of the suction pad of a sheet cutting device. It is a top view which shows the other modification of the suction pad of a sheet cutting device.

Explanation of symbols

1 Lithium ion secondary battery (stacked battery),
4 Positive electrode,
6 negative electrode,
10, 50, 60 sheet cutting device,
13, 61 Supply side suction pad (supply side suction part),
14 Unloading side suction pad (unloading side suction part),
16 Supply side connecting part,
17a supply side fixed extension,
17b supply side movable extension,
24 Supply side inclined part,
25 Supply side groove,
26 Supply side lead-in part,
27 Supply side suction surface,
31 Unloading side connecting part,
32a Unloading side extension (butt extension),
32b Unloading side extension,
33 Unloading side groove,
34 Unloading side inclined part,
35 Unloading side suction surface,
36 Unloading side pull-in part,
37 Vacuum source,
40 control unit,
51 second carry-out side groove,
62 1st unloading side suction pad (unloading side suction part),
63 2nd unloading side suction pad (unloading side suction part),
65 gap,
P separator (sheet),
S Separator sheet (sheet material).

Claims (9)

A sheet cutting device for cutting a sheet from a sheet material supplied as a material,
A supply-side suction part having a supply-side suction surface capable of sucking the sheet material;
A delivery side suction surface capable of sucking the sheet material, and a delivery side suction part located downstream of the supply side suction part in the sheet material supply direction,
The supply side suction part and the carry-out side suction part are relatively close to and away from each other along the supply direction of the sheet material,
At least one of the supply side suction part and the carry-out side suction part is formed with a lead-in part drawn in from the side close to each other along the supply direction. The sheet cutting device is characterized in that an extension that enters the portion is formed.   The supply side suction part and the carry-out side suction part each include at least one extension part extending along the supply direction, and the extension part and the retracting part provided in the same suction part intersect the supply direction. The sheet cutting device according to claim 1, wherein the sheet cutting device is formed so as to be alternately arranged in the direction in which the sheet is cut.   3. The sheet cutting according to claim 1, wherein at least one of the extensions is a movable extension capable of moving back and forth along a surface of the sheet material in a direction crossing the supply direction. apparatus. The movable extension portion is provided on one of the supply side suction portion and the unloading side suction portion, and the other end is provided with a butt extension portion that is an extension portion that butts the movable extension portion and the tips,
The sheet cutting device according to claim 3, wherein the movable extension part and the butt extension part that face each other support an edge part in a direction that intersects the supply direction of the sheet material.   5. The sheet cutting device according to claim 3, wherein both end portions of the movable extension portion and the butting extension portion are formed so as to overlap in the supply direction.   6. At least one row of groove portions extending in a direction crossing the supply direction is formed on at least one of the supply side suction surface and the carry-out side suction surface. The sheet cutting device according to the description.   The at least one of the supply side suction part and the carry-out side suction part is divided in the supply direction and formed so as to be able to approach and separate from each other, and a gap when separated is the groove part. Sheet cutting device.   The sheet cutting device according to any one of claims 1 to 7, further comprising a control unit capable of individually adjusting the suction force of the supply side suction unit and the carry-out side suction unit. A sheet cutting method for cutting a sheet from a sheet material supplied as a material,
A supply-side suction portion having a supply-side suction surface capable of sucking the sheet material, and a discharge-side suction surface capable of sucking the sheet material, and positioned downstream of the supply-side suction portion in the sheet material supply direction. A supply-side suction step for sucking the supply-side suction surface on which the sheet material is placed, in a state of separating the carry-out side suction unit
While maintaining the suction on the supply side suction surface, with the suction on the unloading side suction surface stopped, the unloading side suction unit is brought close to the supply side suction unit, and the supply side suction unit and the unloading side suction unit A suction part proximity step of inserting an extension part formed so as to enter the drawing part into the other part of the pair, to the drawing part drawn along the supply direction from the side adjacent to at least one;
A carry-out suction step for starting suction of the carry-out suction surface;
Pulling out the sheet material by separating the carry-out suction part from the supply-side suction part in a state where the sheet material is sucked into the carry-out suction surface;
And a cutting step of cutting the sheet material at a predetermined position in the supply direction.

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