JP2022107195A - Cutting device of belt-like sheet and cutting method of belt-like sheet - Google Patents

Abstract

To provide a cutting device of belt-like sheet and a cutting method of belt-like sheet capable of repeatedly cutting belt-like sheet into a constant size precisely.SOLUTION: A conveyance roller 20 which rotates in a circumferential direction and conveys a belt-like sheet 10 in conveyance direction DM along a longitudinal direction DL has one or a plurality of cutting blades 21 elongated in an axial line direction of the conveyance roller 20 at regular interval in a circumferential direction on the outer circumferential surface 20b side of the conveyance roller 20 and conveys the belt-like sheet 20 so as to wind the belt-like sheet 10 around an outer circumferential surface 20b of the conveyance roller 20, and an anvil 31 which pushes a portion located on the outer side in a radial direction of the conveyance roller 20 with respect to the cutting blade 21 of the bet-like sheet 10 against the cutting blade 21 located on the inner side in a radial direction and cuts the belt-like sheet 10, when the cutting blade 21 which moves in the circumferential direction together with the belt-like sheet 10 in accordance with rotation of the conveyance roller 20 arrives at a first circumferential direction position P1 of the conveyance roller 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a strip-shaped sheet cutting device and a strip-shaped sheet cutting method.

Patent Document 1 discloses the following strip-shaped sheet cutting device and strip-shaped sheet cutting method. Specifically, the cutting method of Patent Document 1 is a step of winding a long ceramic green sheet around the outer peripheral surface of a cylindrical drum and rotating the drum to feed the ceramic green sheet, and the ceramic green sheet is a drum. A step of cutting the ceramic green sheet supported on the outer peripheral surface of the drum by moving the cutting blade toward the outer peripheral surface of the drum in the vicinity of the portion away from the outer peripheral surface is provided.

Japanese Unexamined Patent Publication No. 6-310389

The cutting blade stands by at a position separated radially outward from the ceramic green sheet conveyed by the drum. Then, when the predetermined timing for cutting the ceramic green sheet comes, the cutting blade is moved inward in the radial direction of the drum by a reciprocating moving means such as an air cylinder, and the ceramic green sheet is supported on the outer peripheral surface of the drum. To disconnect. After cutting, the cutting blade is moved outward in the radial direction of the drum by a reciprocating moving means such as an air cylinder, and returned to a standby position separated from the ceramic green sheet conveyed by the drum. By repeating this series of operations, a long ceramic green sheet (strip sheet) is continuously cut to a certain size.

However, the timing of cutting the strip-shaped sheet by moving the cutting blade inward in the radial direction of the drum by a reciprocating moving means such as an air cylinder is set according to the conveying speed of the strip-shaped sheet conveyed in the circumferential direction of the drum by the rotation of the drum. , It was difficult to keep the intervals constant. For this reason, it has been difficult to repeatedly cut the strip-shaped sheet to a constant size with high accuracy by the above-mentioned strip-shaped sheet cutting device and the strip-shaped sheet cutting method.

The present invention has been made in view of the present situation, and an object of the present invention is to provide a strip-shaped sheet cutting device capable of repeatedly cutting a strip-shaped sheet to a constant size with high accuracy, and a method for cutting the strip-shaped sheet. do.

One aspect of the present invention is a strip-shaped sheet cutting device that cuts a strip-shaped sheet extending in the longitudinal direction in a width direction orthogonal to the longitudinal direction, in which the strip-shaped sheet is rotated in the circumferential direction and the strip-shaped sheet is conveyed along the longitudinal direction. The transport roll is provided with one cutting blade extending in the axial direction of the transport roll or a plurality of cutting blades extending in the axial direction of the transport roll at equal intervals in the circumferential direction, and the strip-shaped sheet is conveyed. A transport roll that is wound around the outer peripheral surface of the roll for transport, and each of the cutting blades that move in the circumferential direction together with the strip-shaped sheet as the transport roll rotates are located at positions in the first circumferential direction of the transport roll. When the band-shaped sheet reaches, the portion of the strip-shaped sheet located outside the transport roll in the radial direction is pressed against the cutting blade located inside the strip-shaped sheet to cut the strip-shaped sheet. It is a strip-shaped sheet cutting device including an anvil and a strip-shaped sheet.

The cutting device described above includes a transport roll that rotates in the circumferential direction and transports the strip-shaped sheet in the transport direction along the longitudinal direction. This transport roll transports the strip-shaped sheet so as to be wound around the outer peripheral surface of the transport roll. Further, the transfer roll has a cutting blade extending in the axial direction of the transfer roll (direction corresponding to the width direction of the strip-shaped sheet conveyed by the transfer roll) on the outer peripheral surface side of the transfer roll. One cutting blade or a plurality of cutting blades are provided (fixed) on the outer peripheral surface side of the transport roll at equal intervals in the circumferential direction.

This cutting blade has, for example, a length equal to or greater than the width dimension (dimension in the width direction) of the strip-shaped sheet, and faces the strip-shaped sheet conveyed by the conveying roll over the entire width direction of the strip-shaped sheet. It is a provided cutting blade. This cutting blade is provided on the transport roll, for example, in a manner of being fixed to a groove portion recessed inward in the radial direction from a cylindrical outer peripheral surface. This cutting blade moves in the circumferential direction together with the strip-shaped sheet as the transport roll rotates.

In addition, the cutting device described above comprises an anvil. In this anvil, when each cutting blade that moves in the circumferential direction together with the strip-shaped sheet with the rotation of the transport roll reaches the position in the first circumferential direction of the transport roll, the strip-shaped sheet of the strip-shaped sheet is of the transport roll with respect to the cutting blade. The portion located on the outer side in the radial direction is pressed against the cutting blade located on the inner side in the radial direction to cut the strip-shaped sheet.

According to such a cutting device, the strip-shaped sheet can be repeatedly cut to a constant size with high accuracy. The reason is that in this cutting device, the cutting position of the strip-shaped sheet can be determined at the position (fixed position) of the cutting blade provided on the transport roll for transporting the strip-shaped sheet, and the cutting blade is set on the transport roll. This is because one of them is provided, or a plurality of them are provided at equal intervals in the circumferential direction of the transport roll. Therefore, when the transport roll has only one cutting blade, the cutting length (cutting interval) of the strip-shaped sheet can be made uniform with the outer peripheral length of the transport roll. When a plurality of cutting blades are provided at equal intervals in the circumferential direction of the transport roll, the cutting lengths (cutting intervals) of the strip-shaped sheet are arranged at equal intervals along the outer peripheral surface of the transport roll. It can be aligned with the size of the arrangement interval (dimension in the circumferential direction). Therefore, in the above-mentioned cutting device, the strip-shaped sheet can be repeatedly cut to a constant size with high accuracy.

The method of cutting the strip-shaped sheet with the cutting blade is not particularly limited, and may be a score cut method (push cut method) or a leather cut method (grooving method). Further, the band-shaped sheet may be any band-shaped sheet extending in the longitudinal direction, and examples thereof include a band-shaped electrode sheet for a battery and a band-shaped separator sheet for a battery. Examples of the strip-shaped electrode sheet include those in which an electrode mixture layer is laminated on the surface of a strip-shaped current collector foil. Examples of the strip-shaped separator sheet include those made of a strip-shaped polyolefin resin sheet.

Another aspect of the present invention is a method of cutting a strip-shaped sheet extending in the longitudinal direction in a width direction orthogonal to the longitudinal direction using a cutting device, wherein the cutting device is rotated in the circumferential direction. A transport roll that transports the strip-shaped sheet in the transport direction along the longitudinal direction, and has one cutting blade extending in the axial direction of the transport roll on the outer peripheral surface side of the transport roll or at equal intervals in the circumferential direction. A transport roll having a plurality of the strip-shaped sheets and transporting the strip-shaped sheet so as to be wound around the outer peripheral surface of the transport roll, and each of the cuttings moving in the circumferential direction together with the strip-shaped sheet as the transport roll rotates. When the blade reaches the position in the first circumferential direction of the transport roll, the portion of the strip-shaped sheet located outside the transport roll in the radial direction with respect to the cutting blade is located inside in the radial direction. The cutting method includes an anvil that is pressed against the cutting blade to cut the strip-shaped sheet, and the cutting method transports the strip-shaped sheet by the transport roll and the circumference of the strip-shaped sheet together with the rotation of the transport roll. When each of the cutting blades moving in the direction reaches the position in the first circumferential direction, a portion of the strip-shaped sheet located outside the cutting blade in the radial direction of the transport roll is formed by the anvil. This is a method for cutting a strip-shaped sheet by pressing it against the cutting blade located inside in the radial direction to cut the strip-shaped sheet.

In the above-mentioned cutting method, the strip-shaped sheet extending in the longitudinal direction is cut in the width direction by using the above-mentioned cutting device. Specifically, while transporting the strip-shaped sheet by the transport roll, each cutting blade (one or a plurality of cutting blades) that moves in the circumferential direction together with the strip-shaped sheet as the transport roll rotates is moved to the position in the first circumferential direction. When it reaches, the portion of the strip-shaped sheet located on the outer side of the transport roll in the radial direction with respect to the cutting blade is pressed against the cutting blade located on the inner side in the radial direction by the anvil to cut the strip-shaped sheet. The method of cutting the strip-shaped sheet with the cutting blade is not particularly limited, and may be a score cut method (push cut method) or a leather cut method (grooving method).

According to such a cutting method, the strip-shaped sheet can be repeatedly cut to a constant size with high accuracy. The reason is that in this cutting method, the cutting position of the strip-shaped sheet can be determined at the position (fixed position) of the cutting blade provided on the transport roll for transporting the strip-shaped sheet, and the cutting blade is set on the transport roll. This is because one of them is provided, or a plurality of them are provided at equal intervals in the circumferential direction of the transport roll. Therefore, when the transport roll has only one cutting blade, the cutting length (cutting interval) of the strip-shaped sheet can be made uniform with the outer peripheral length of the transport roll. When a plurality of cutting blades are provided at equal intervals in the circumferential direction of the transport roll, the cutting length (cutting interval) of the strip-shaped sheet is set by the cutting blades arranged at equal intervals along the outer peripheral surface of the transport roll. It can be aligned with the size of the arrangement interval (dimension in the circumferential direction). Therefore, in the above-mentioned cutting method, the strip-shaped sheet can be repeatedly cut to a constant size with high accuracy.

It is the schematic of the strip-shaped sheet cutting apparatus which concerns on embodiment. It is a top view of the strip-shaped sheet. It is the C part enlarged view of FIG. It is a figure explaining the cutting method of the strip-shaped sheet which concerns on embodiment. It is a figure explaining the cutting apparatus of the strip-shaped sheet which concerns on a deformed form.

<Embodiment>
Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. In the present embodiment, the strip-shaped sheet cutting device 1 shown in FIG. 1 (hereinafter, also simply referred to as the cutting device 1) is used to rotate the strip-shaped sheet 10 extending in the longitudinal direction DL in the width direction DW (direction orthogonal to the longitudinal direction DL). , In the direction orthogonal to the paper surface in FIG. 1). As the band-shaped sheet 10, for example, a band-shaped electrode sheet for a battery, a band-shaped separator sheet for a battery, or the like can be used. Examples of the strip-shaped electrode sheet include those in which an electrode mixture layer is laminated on the surface of a strip-shaped current collector foil. Examples of the strip-shaped separator sheet include those made of a strip-shaped polyolefin resin sheet.

The cutting device 1 of the present embodiment cuts the strip-shaped sheet 10 in the width direction DW to produce a plurality of strip-shaped sheets 18 (see FIG. 1). As shown in FIG. 1, the cutting device 1 includes a transport roll 20, an anviled roll 30, a nip roll 50, and a storage case 70. The transport roll 20 rotates in the circumferential direction (clockwise in FIG. 1) to transport the strip-shaped sheet 10 in the transport direction DM along the longitudinal direction DL. The transport roll 20 transports the strip-shaped sheet 10 so as to be wound around the outer peripheral surface 20b of the transport roll 20.

Further, the transport roll 20 has a cutting blade 21 extending in the axial direction of the transport roll 20 (the direction in which the axis AX extends, the direction orthogonal to the paper surface in FIG. 1) on the outer peripheral surface 20b side of the transport roll 20. The axial direction of the transport roll 20 coincides with the width direction DW of the strip-shaped sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 and transported. The cutting blade 21 has a length equal to or longer than the width dimension W (dimension of DW in the width direction, see FIG. 2) of the strip-shaped sheet 10, and is wound around the outer peripheral surface 20b of the transport roll 20 and transported. It is provided so as to face 10 over the entire width direction DW.

Specifically, the cutting blade 21 is fixed to the bottom portion 23b of the groove portion 23 that is recessed inward in the radial direction from the cylindrical outer peripheral surface 20b of the transport roll 20, and the cutting edge 21b is oriented radially outward. It is provided on the transport roll 20 (see FIGS. 1 and 3). The cutting blade 21 has a triangular cross section and extends in the axial direction of the transport roll 20 (the direction orthogonal to the paper surface in FIG. 3). The cutting blade 21 moves in the circumferential direction together with the strip-shaped sheet 10 as the transport roll 20 rotates.

The transport roll 20 is a hollow cylindrical suction roll, and a large number of through holes 20d are formed in the cylindrical wall portion forming the outer peripheral surface 20b (see FIG. 1). A suction device (not shown) for sucking air in the internal space of the transport roll 20 is connected to the transport roll 20. By sucking the air in the transport roll 20 by this suction device, the strip-shaped sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 is sucked toward the center side of the transport roll 20 through the through hole 20d of the transport roll 20. Receive the power to be done. As a result, the strip-shaped sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 and the strip-shaped sheet 18 produced by cutting are attracted to the outer peripheral surface 20b of the transport roll 20 while being attracted to the outer peripheral surface 20b of the transport roll 20. Is transported along.

Further, the transport roll 20 is formed with four groove portions 23 recessed inward in the radial direction from the outer peripheral surface 20b at equal intervals in the circumferential direction of the transport roll 20 (see FIG. 1). The above-mentioned cutting blade 21 is fixed to the bottom portion 23b of each groove portion 23. Therefore, the transport roll 20 is provided (fixed) with four cutting blades 21 at equal intervals in the circumferential direction of the transport roll 20. In other words, on the transport roll 20, four cutting blades 21 are arranged so as to be offset by 90 ° around the axis AX. The tip of the cutting blade 21 (the tip of the cutting edge 21b) is arranged in the groove 23 (at a radial position equivalent to the outer peripheral surface 20b, or radially inside the outer peripheral surface 20b).

The anvilized roll 30 has a columnar roll 32 and an anvil 31 fixed to the roll 32 (see FIGS. 1 and 3). The anvil 31 is a push-off anvil, and is provided on the roll 32 so as to project radially outward from the outer peripheral surface 32b of the roll 32. The anvilized roll 30 is provided in parallel with the transport roll 20. Specifically, the roll 30 with anvil is provided so that the outer peripheral surface 32b of the roll 32 faces (faces) the outer peripheral surface 20b of the transport roll 20 at the position P1 in the first circumferential direction of the transport roll 20 (FIG. 1).

The position P1 in the first circumferential direction is higher than the winding start position PS of the strip-shaped sheet 10 around the outer peripheral surface 20b of the transport roll 20 (the position where the outer peripheral surface 20b of the transport roll 20 and the outer peripheral surface of the nip roll 50 face each other). It is located on the downstream side of the direction DM. Specifically, the position P1 in the first circumferential direction is a position moved around the axis AX of the transport roll 20 by a first angle θ1 (45 ° in this embodiment) from the winding start position PS to the downstream side of the transport direction DM. (See FIG. 1).

Further, the diameter (outer diameter) of the roll 32 of the roll 30 with anvil is 1/4 of the diameter (outer diameter) of the transport roll 20, and the peripheral speed of the roll 32 is the same as the peripheral speed of the transport roll 20. .. Therefore, when the transport roll 20 rotates 1/4 in the circumferential direction, the roll 30 with anvil itself makes one rotation in the circumferential direction. That is, when the transport roll 20 makes one rotation in the circumferential direction, the roll 30 with anvil itself makes four rotations in the circumferential direction. Then, when each of the cutting blades 21 of the transport roll 20 reaches the position P1 in the first circumferential direction of the transport roll 20, the anvil 31 reaches the position P1 in the first circumferential direction with the cutting blade 21 (blade edge 21b) in the radial direction. A transport roll 20 and a roll with anvil 30 are provided so as to face each other (see FIGS. 1 and 3).

Therefore, when each of the cutting blades 21 that move in the circumferential direction together with the strip-shaped sheet 10 from the winding start position PS with the rotation of the transport roll 20 reaches the first circumferential position P1 of the transport roll 20, the roll with anvil 30 The portion of the strip-shaped sheet 10 located on the outer side of the transport roll 20 in the radial direction (referred to as the cutting blade facing portion 10c) with respect to the cutting blade 21 is changed to the cutting blade 21 located on the inner side in the radial direction by the anvil 31 of the above. By pressing, the strip-shaped sheet 10 can be cut in the width direction DW (see FIG. 3). In the present embodiment, the strip-shaped sheet 10 is cut by the score cut method (push-cut method).

Further, in the present embodiment, the protrusion height of the anvil 31 (the amount of protrusion of the roll 32 in the radial direction) and the position of the tip of the cutting blade 21 so that the anvil 31 does not come into contact with the cutting blade 21 during this cutting. (Position of the transport roll 20 in the radial direction) is set. Therefore, in the present embodiment, the strip-shaped sheet 10 is cut by the score cut method (push-cut method) without bringing the anvil 31 into contact with the tip of the cutting edge 21b of the cutting blade 21 (see FIG. 3). Note that FIG. 3 is an enlarged view of part C of FIG. 1, which is an enlarged cross-sectional view of the cutting device 1 when the cutting blade 21 reaches the position P1 in the first circumferential direction (in a direction orthogonal to the axial direction of the transport roll 20). It is a cut enlarged sectional view).

In this way, the strip-shaped sheet 10 is cut in the width direction DW to produce the strip-shaped sheet 18. The produced strip-shaped sheet 18 is transported along the outer peripheral surface 20b of the transport roll 20 as the transport roll 20 rotates, and then is housed in a storage case 70 located below the transport roll 20 (. (See FIG. 1).

According to such a cutting device 1, the strip-shaped sheet 10 can be repeatedly cut to a constant size with high accuracy at the position P1 in the first circumferential direction. The reason is that in this cutting device 1, the cutting position (position of the cutting portion 10b) of the strip-shaped sheet 10 is set to the position (fixed position) of the cutting blade 21 provided on the transport roll 20 that conveys the strip-shaped sheet 10. This is because the cutting blades 21 are provided at equal intervals in the circumferential direction of the transport roll 20. As a result, the cutting length of the strip-shaped sheet 10 (cutting interval, that is, the length of the strip-shaped sheet 18) is set to the dimension (perimeter) of the cutting blades 21 arranged at equal intervals along the outer peripheral surface 20b of the transport roll 20. Orientation dimensions) can be aligned.

In the present embodiment, four cutting blades 21 are provided at equal intervals in the circumferential direction of the transport roll 20. That is, the cutting blades 21 are arranged side by side in the circumferential direction of the transport roll 20 at equal intervals of a length L1 which is 1/4 of the outer peripheral length of the transport roll 20. Therefore, the cutting length of the strip-shaped sheet 10 (cutting interval, that is, the length of the strip-shaped sheet 18) can be aligned with the length L1 which is 1/4 of the outer peripheral length of the transport roll 20. As described above, in the cutting device 1 of the present embodiment, the strip-shaped sheet 10 can be repeatedly cut to a constant size L1 with high accuracy (see FIG. 4). Note that FIG. 4 is a plan view of the strip-shaped sheet 10 cut by the cutting blade 21 while being conveyed by the conveying roll 20 in the conveying direction DM.

Next, a method of cutting the strip-shaped sheet 10 according to the embodiment will be described. In the present embodiment, the strip-shaped sheet 10 extending in the longitudinal direction DL is cut in the width direction DW by using the cutting device 1 described above. Specifically, the cutting blade 21 that moves the strip-shaped sheet 10 in the circumferential direction together with the strip-shaped sheet 10 from the winding start position PS as the transport roll 20 rotates while the strip-shaped sheet 10 is conveyed by the rotating transport roll 20 is the transport roll 20. When the position P1 in the first circumferential direction is reached, the portion of the strip-shaped sheet 10 located outside the radial direction of the transport roll 20 with respect to the cutting blade 21 reaching the position P1 in the first circumferential direction by the anvil 31 of the roll 30 with anvil. (Cut blade facing portion 10c) is pressed against the cutting blade 21 located inside in the radial direction (see FIGS. 1 and 3).

As a result, the strip-shaped sheet 10 is cut in the width direction DW to produce the strip-shaped sheet 18. The produced strip-shaped sheet 18 is transported along the outer peripheral surface 20b of the transport roll 20 as the transport roll 20 rotates, and then is housed in a storage case 70 located below the transport roll 20 (. (See FIG. 1). In this embodiment, the strip-shaped sheet 10 is cut by a score cut method (push-cut method).

According to such a cutting method, the strip-shaped sheet 10 can be repeatedly cut to a constant size with high accuracy. The reason is that in this cutting method, the cutting position (position of the cutting portion 10b) of the strip-shaped sheet 10 is set to the position (fixed position) of the cutting blade 21 provided on the transport roll 20 that conveys the strip-shaped sheet 10. Moreover, the cutting blades 21 are provided at equal intervals in the circumferential direction of the transport roll 20. As a result, the cutting length of the strip-shaped sheet 10 (that is, the length of the strip-shaped sheet 18) is set to the dimension of the arrangement interval (circumferential direction dimension) of the cutting blades 21 arranged at equal intervals along the outer peripheral surface 20b of the transport roll 20. ) Can be aligned. Specifically, the cutting length of the strip-shaped sheet 10 (that is, the length of the strip-shaped sheet 18) can be aligned with the length L1 which is 1/4 of the outer peripheral length of the transport roll 20. As described above, in the cutting method of the present embodiment, the strip-shaped sheet 10 can be repeatedly cut to a constant size L1 with high accuracy (see FIG. 4).

<Transformation form>
In the embodiment, the strip-shaped sheet 10 was cut by a score cut method (push-cut method). On the other hand, in this modified form, as shown in FIG. 5, the strip-shaped sheet 10 is cut by a leather cutting method (grooving method). FIG. 5 is a diagram for explaining the strip-shaped sheet cutting device 101 according to the deformed form, and is a diagram corresponding to an enlarged view of part C in FIG. The strip-shaped sheet cutting device 101 according to the modified form is different from the cutting device 1 of the embodiment only in that the anvil-equipped roll 30 is changed to the anvil-equipped roll 40.

The anvilized roll 40 differs only in the anvil 41 from the anvilized roll 30 of the embodiment. The anvil 41 is an anvil for grooving, has a groove portion 41b that opens to the outside, and has a groove portion 41b into which the cutting edge 21b of the cutting blade 21 of the transport roll 20 can be inserted (see FIG. 5).

In this modified form, the cutting device 101 is used to cut the strip-shaped sheet 10 extending in the longitudinal direction DL in the width direction DW. Specifically, when the cutting blade 21 that moves in the circumferential direction together with the strip-shaped sheet 10 from the winding start position PS with the rotation of the transport roll 20 reaches the first circumferential position P1 of the transport roll 20, the roll with anvil 40 The portion (cutting blade facing portion 10c) of the strip-shaped sheet 10 located outside the transport roll 20 in the radial direction with respect to the cutting blade 21 reaching the position P1 in the first circumferential direction of the strip-shaped sheet 10 is placed inside in the radial direction. It is pressed against the positioned cutting blade 21 (see FIG. 5).

At this time, the tip portion 41c of the anvil 41 enters the groove portion 23 of the transport roll 20 and is arranged radially inside the outer peripheral surface 20b of the transport roll 20, and the cutting edge 21b of the cutting blade 21 is a strip-shaped sheet 10. It penetrates the cutting blade facing portion 10c and enters the groove portion 41b of the anvil 41 (see FIG. 5). As a result, the strip-shaped sheet 10 is cut in the width direction DW by the leather cutting method (grooving method) to produce the strip-shaped sheet 18. Also in the cutting device 101 and the cutting method of the present modified form, the strip-shaped sheet 10 can be repeatedly cut to a constant size L1 with high accuracy as in the embodiment (see FIG. 4).

In the above, the present invention has been described in accordance with the embodiments and modifications, but the present invention is not limited to the above-described embodiments and the like, and it is said that the present invention can be appropriately modified and applied without departing from the gist thereof. Not to mention.

For example, in the embodiment and the modified form, the four cutting blades 21 are provided at equal intervals in the circumferential direction of the transport roll 20, but the number of cutting blades 21 is not limited to this, and may be any number. You may. For example, the strip-shaped sheet 10 may be cut by using a cutting device provided with only one cutting blade 21 on the transport roll 20. In this case, the cutting length of the strip-shaped sheet 10 (that is, the length of the strip-shaped sheet 18) can be aligned with the outer peripheral length of the transport roll 20. As a result, the strip-shaped sheet 10 can be repeatedly cut to a certain size (outer peripheral length of the transport roll 20) with high accuracy.

Alternatively, the strip-shaped sheet 10 may be cut by using a cutting device in which the two cutting blades 21 are provided at equal intervals in the circumferential direction of the transport roll 20. In this case, the cutting length of the strip-shaped sheet 10 (that is, the length of the strip-shaped sheet 18) can be made to be halved of the outer peripheral length of the transport roll 20. As a result, the strip-shaped sheet 10 can be repeatedly cut to a certain size (1/2 of the outer peripheral length of the transport roll 20) with high accuracy.

1,101 Band-shaped sheet cutting device 10 Band-shaped sheet 20 Conveying roll 20b Outer peripheral surface 21 Cutting blade 30,40 Anviled roll 31,41 Anvil 32,42 Roll DL Longitudinal direction DM Conveying direction DW Width direction P1 First circumferential position

Claims (2)

In a strip-shaped sheet cutting device that cuts a strip-shaped sheet extending in the longitudinal direction in the width direction orthogonal to the longitudinal direction.
A transport roll that rotates in the circumferential direction and transports the strip-shaped sheet in the transport direction along the longitudinal direction, and has one cutting blade extending in the axial direction of the transport roll on the outer peripheral surface side of the transport roll. A transport roll having a plurality of strip-shaped sheets at equal intervals in the circumferential direction and transporting the strip-shaped sheet so as to be wound around the outer peripheral surface of the transport roll.
When each of the cutting blades that move in the circumferential direction together with the strip-shaped sheet with the rotation of the transport roll reaches the position in the first circumferential direction of the transport roll, the cutting blade of the strip-shaped sheet A strip-shaped sheet cutting device comprising an anvil that presses a portion located on the outer side of the transport roll on the radial side of the transport roll against the cutting blade located on the inner side of the radial direction to cut the strip-shaped sheet. In a method for cutting a strip-shaped sheet extending in the longitudinal direction, the strip-shaped sheet is cut in the width direction orthogonal to the longitudinal direction using a cutting device.
The cutting device
A transport roll that rotates in the circumferential direction and transports the strip-shaped sheet in the transport direction along the longitudinal direction, and has one cutting blade extending in the axial direction of the transport roll on the outer peripheral surface side of the transport roll. A transport roll having a plurality of strip-shaped sheets at equal intervals in the circumferential direction and transporting the strip-shaped sheet so as to be wound around the outer peripheral surface of the transport roll.
When each of the cutting blades that move in the circumferential direction together with the strip-shaped sheet with the rotation of the transport roll reaches the position in the first circumferential direction of the transport roll, the cutting blade of the strip-shaped sheet An anvil is provided, which presses a portion located on the outer side in the radial direction of the transport roll against the cutting blade located on the inner side in the radial direction to cut the strip-shaped sheet.
The cutting method is
When each of the cutting blades, which moves in the circumferential direction together with the strip-shaped sheet with the rotation of the transport roll while transporting the strip-shaped sheet by the transport roll, reaches the position in the first circumferential direction, the strip-shaped sheet is formed. Of the sheet, a portion of the sheet located outside the transport roll in the radial direction with respect to the cutting blade is pressed against the cutting blade located inside the radial direction by the anvil to cut the strip-shaped sheet. Cutting method.

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