JP2014012296A - Method and apparatus for cutting sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for cutting a sheet capable of efficiently obtaining a sheet having a narrow width in a form easy to use in a post processing from a sheet-shaped material having a wide width.SOLUTION: In obtaining a sheet S1 having a narrow width narrower than a width of a sheet-shaped material S0 by cutting the sheet-shaped material S0 at a middle position in a width direction SO, a roll R1 having a narrow width is obtained by winding the sheet S1 having a narrow width in which both ends in the width direction are cut by a laser beam, in a rolled state, while drawing out the sheet-shaped material S0 from a roll R0 having a wide width obtained by winding the sheet-shaped material S0 in a rolled state, and cutting the sheet-shaped material S0 by irradiating a laser beam L to a plurality of places in a width direction of an extraction part S5 of the sheet-shaped metrial S0. In this case, a gas generated by the irradiation with the laser beam L is sucked by a dust collector 70 to prevent foreign matters from sticking to the roll R0 having a wide width and the roll R1 having a narrow width.

Description

  The present invention relates to a sheet cutting method and a sheet cutting apparatus for obtaining a narrow sheet by cutting a sheet-like material at an intermediate position in the width direction.

  When manufacturing an aluminum electrolytic capacitor or the like, it is common to wind an adhesive tape for element stop around the outer peripheral surface of a capacitor element in which an electrode foil and a separator are wound in a cylindrical shape. Here, the width dimension of the electrode foil, the separator and the adhesive tape is set according to the dimension (length dimension) in the axial direction of the capacitor element. For this reason, generally about electrode foil, a separator, and an adhesive tape, a wide sheet-like material is cut | disconnected in the middle position of the width direction, and it is set as the narrow sheet | seat with the width dimension according to the size of a capacitor | condenser element.

  Conventionally, a cutting device having a rotary blade is used for such cutting. However, in the case of a cutting apparatus equipped with a rotary blade, it is necessary to adjust the position of the rotary blade every time the width to be cut is changed, and this setup work has a problem that it takes a lot of labor.

  On the other hand, as a method of cutting a sheet-like member, a method of cutting an aluminum foil with a YAG laser beam has been proposed (see Patent Document 1).

Japanese Patent Publication No.59-45212

  When manufacturing a capacitor, high productivity is required. For this reason, the electrode foil, the separator and the adhesive tape are preferably a narrow roll obtained by winding a sheet cut into a predetermined width dimension into a roll shape. It is possible to efficiently supply materials to the crimping machine and the winder for manufacturing the element.

  However, although a method of cutting an aluminum foil with a laser beam is disclosed in Patent Document 1, only a slitter device having a rotary blade is proposed for a sheet cutting method and a sheet cutting device for obtaining a narrow roll. However, there is a problem that productivity in obtaining a narrow roll is not sufficiently improved.

  In view of the above problems, an object of the present invention is to provide a sheet cutting method and a sheet cutting apparatus that can efficiently obtain a narrow sheet in a form that can be easily used in a subsequent process from a wide sheet-like material. It is in.

  In order to solve the above problems, in the present invention, in the sheet cutting method of obtaining a narrow sheet having a narrower width than the sheet-like material by cutting the sheet-like material at an intermediate position in the width direction, the sheet-like material is rolled. The sheet-like material is pulled out from a wide roll wound in a shape, and a laser beam is irradiated to a plurality of portions in the width direction of the drawing-out portion of the sheet-like material, and both ends in the width direction are cut by the laser beam. A narrow sheet is obtained by winding a wide sheet into a roll.

  “Wide width” and “narrow width” in the present invention mean that the width dimension is different before and after cutting, and means the relative relationship between the width dimensions.

  In the present invention, a sheet-like material supplied in a roll shape is cut by a laser beam to obtain a narrow roll in which a narrow sheet is wound into a roll shape. For this reason, when changing the width dimension to be cut, it is only necessary to change the irradiation position of the laser beam, so that the setup operation can be efficiently performed unlike the method using the rotary blade. In addition, cutting using a laser beam has an advantage that no burrs or the like are generated at a cutting point unlike a method using a rotary blade. Further, according to the present invention, the sheet-shaped material can be reliably cut even when the power of the laser beam is small because the portion of the sheet-shaped material drawn from the wide roll may be irradiated with the laser beam.

  Further, a sheet cutting apparatus for carrying out the sheet cutting method according to the present invention includes a winding rotary body that winds up the sheet material drawn from the wide roll into a roll shape, and the sheet material from the wide roll. A state in which the narrow sheet, which is cut at both ends in the width direction by the laser beam, is wound up as the narrow roll on the winding rotary body; And having a laser device.

  In the sheet cutting method according to the present invention, when irradiating the laser beam to a plurality of portions in the width direction of the extraction portion, the emission direction of the laser beam is set to the extraction portion while turning on / off the emission of the laser beam. It is preferable to scan in the width direction. Further, in the sheet cutting device according to the present invention, the laser device irradiates the laser beam while turning on and off the laser beam when irradiating the laser beam to a plurality of positions in the width direction of the drawer portion. It is preferable to scan the emission direction in the width direction of the extraction portion.

  In the sheet cutting method according to the present invention, it is preferable that the sheet-shaped material is cut while sucking a position where the laser beam is irradiated in the sheet-shaped material. According to such a configuration, foreign matter generated during laser cutting can be sucked and removed, so that the foreign matter can be prevented from adhering to the sheet-like material or the narrow sheet.

  In the sheet cutting method according to the present invention, the surface of the sheet-like material or the surface of the narrow sheet is irradiated with a laser beam different from the laser beam or the laser beam to remove foreign matters from the surface. Alternatively, it is preferable to perform marking on the surface. Such a cutting method is the sheet cutting apparatus according to the present invention, wherein the surface of the sheet material or the surface of the narrow sheet is irradiated with a laser beam from the laser apparatus or a laser apparatus different from the laser apparatus. This can be carried out by removing foreign substances from the surface or marking the surface. According to such a configuration, it is possible to remove foreign substances from the surface of the narrow sheet and to mark the surface of the narrow sheet simultaneously with the cutting of the sheet-like material.

  In the present invention, examples of the sheet-like material include capacitor electrode foils, capacitor separators, and capacitor element-stopping adhesive tapes. Particularly in the case of a wound capacitor, since the width dimensions required for the narrow sheet are various, the effect when the present invention is applied is great.

  In the present invention, a sheet-shaped material supplied in a roll shape is cut by a laser beam to obtain a narrow roll in which the narrow sheet is wound into a roll shape. Since the irradiation position of the beam only needs to be changed, the setup work can be performed efficiently unlike the method using the rotary blade. In addition, cutting using a laser beam has an advantage that no burrs or the like are generated at a cutting point unlike a method using a rotary blade.

It is explanatory drawing which shows the structure of the capacitor | condenser element for aluminum electrolytic capacitors. It is explanatory drawing of the sheet cutting device which concerns on the reference example 1 of this invention. It is explanatory drawing of the sheet cutting device which concerns on the reference example 2 of this invention. It is explanatory drawing of the sheet cutting device which concerns on embodiment of this invention. It is explanatory drawing of the sheet cutting device which concerns on the reference example 3 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, a case where electrode foils (anode foil and cathode foil) for a wound aluminum electrolytic capacitor are cut as a sheet-like material will be mainly described.

[Configuration and manufacturing method of wound capacitor element]
FIG. 1 is an explanatory view showing the structure of a capacitor element for an aluminum electrolytic capacitor. FIGS. 1A and 1B are an explanatory view showing a method of manufacturing the capacitor element and the structure of the capacitor element, respectively. It is explanatory drawing.

  As shown in FIGS. 1A and 1B, in manufacturing the capacitor element 1 for an aluminum electrolytic capacitor, the cathode foil 11, the separator 14, the anode foil 12, and the separator 14 are generally formed in a cylindrical shape in a winder. Wind. Further, after winding, the adhesive tape 19 is wound around the outer peripheral surface of the capacitor element 1 so as not to loosen. The anode foil 12 is obtained by anodizing an aluminum etching foil having a thickness of about 50 to 120 μm. The cathode foil 11 is made of an aluminum etching foil having a thickness of about 20 to 60 μm. The separator 14 is made of so-called electrolytic paper. Here, the width dimensions of the cathode foil 11, the separator 14, the anode foil 12, and the adhesive tape 19 are set according to the dimension (length dimension) in the axial direction of the capacitor element 1. For this reason, the electrode foil (cathode foil 11 and anode foil 12), separator 14 and adhesive tape 19 are supplied to the winder in the state of a narrow sheet S1 having a width according to the size of the capacitor element 1. The In the winder, the lead terminal 17 is connected by a method such as caulking or welding before winding the anode foil 12 and the cathode foil 11 as the capacitor element 1.

  In order to continuously supply the cathode foil 11, the separator 14, the anode foil 12 and the adhesive tape 19 to the winder, the cathode foil 11, the separator 14, the anode foil 12 and the adhesive tape 19 are wound in a roll shape. Then, these members can be supplied efficiently.

  On the other hand, since the capacitor element 1 has various sizes, the cathode foil 11, the separator 14, the anode foil 12, and the adhesive tape 19 need to have various width dimensions. For this reason, as will be described later with reference to FIGS. 2 to 5, the sheet-like materials such as the cathode foil 11, the separator 14, the anode foil 12, and the adhesive tape 19 are first manufactured after a wide sheet-like material is manufactured. Such a wide sheet-like material is cut at an intermediate position in the width direction to form a narrow sheet S1 having a width dimension corresponding to the size of the capacitor element 1.

  In the present invention, the sheet cutting method and the sheet cutting apparatus 20 described below are used when the wide sheet-like material is the narrow sheet S1 having a predetermined width dimension.

[Reference Example 1]
(Device configuration)
FIG. 2 is an explanatory diagram of a sheet cutting device according to Reference Example 1 of the present invention, and FIGS. 2A and 2B are perspective views showing the overall configuration of the sheet cutting device according to Reference Example 1 of the present invention. It is explanatory drawing which shows a figure and the principal part.

  2 (a) and 2 (b), the sheet cutting device 20 according to Reference Example 1 of the present invention rotates a wide roll R0 obtained by winding a wide sheet-like material S0 on a machine base 21 in a roll shape. A raw material side driving device 30 and a laser device 40 are provided. The raw material side driving device 30 includes a servo motor 31, a raw material side rotating body 33 to which rotation of the servo motor 31 is transmitted via a belt mechanism 32, and a base that rotatably supports the raw material side rotating body 33. 34 and a support 38 that holds the wide roll R <b> 0 between the raw material side rotating body 33 and the front side of the raw material side rotating body 33. In the support 38, the tip side facing the raw material side rotating body 33 is a rotatable follower, and the follower is movable in the axial direction. In the wide roll R0, a sheet material S0 is wound around a cylindrical core material C0. For this reason, the tapered distal end portion of the raw material side rotating body 33 and the tapered distal end portion of the support 38 can enter the inside of the core material C0 from both sides to hold the wide roll R0, and the raw material side rotating body. The wide roll R0 can also be removed by separating the 33 tapered tip and the tapered tip of the support 38 from each other. In the raw material side driving device 30 of the sheet cutting device 20, when the servo motor 31 rotates, the raw material side rotating body 33 rotates, and the wide roll R 0 held between the raw material side rotating body 33 and the support 38. Rotates around the axis.

The laser device 40 includes a head 41 mounted on the X-direction slider device 47 and the Y-direction slider device 48, and the head 41 emits a laser beam L toward the outer peripheral surface of the wide roll R0. Although not shown, the laser device 40 includes a laser light source that emits a CO ₂ laser source, a YAG laser, an excimer laser, and the like, and an optical system for the laser beam L emitted from the laser light source. The laser beam L emitted from the laser light source is condensed on the outer peripheral surface of the wide roll R0 as convergent light. In addition to the condensing lens system, the optical system may be configured to include a collimating lens and a beam expander. In this case, the laser beam irradiated from the head 41 to the outer peripheral surface of the wide roll R0. L can be a linear beam.

  In the sheet cutting apparatus 20 of the present embodiment, a dust collecting device 70 and a laser device controller 80 are installed below the machine base 21. The laser device controller 80 controls the feed of the X direction slider device 47 and the Y direction slider device 48 and controls the power of the laser beam L output from the head 41 and the like. The dust collector 70 includes a suction pipe 71 extending to the vicinity of the position where the laser beam L is irradiated on the outer peripheral surface of the wide roll R0. The suction port 73 of the suction pipe 71 has a laser beam L for the wide roll R0. Open near the irradiation position.

  A control panel 50 is installed on the machine base 21. The control panel 50 inputs the number of rotations of the servo motor 31 and the like, and supplies the power of the laser beam L to the laser device controller 80. It is an input panel for performing input regarding a scanning position and the like.

(Cutting method)
In the sheet cutting apparatus 20 of this embodiment, when the sheet-like material S0 is cut at an intermediate position in the width direction to obtain a narrow sheet S1 that is narrower than the sheet-like material S0, the sheet-like material wound in a roll shape S0 is cut into a narrow sheet S1 by a laser beam L to obtain a narrow roll R1 around which the narrow sheet S1 is wound.

  More specifically, first, while rotating the wide roll R0 around the axis line by the raw material side driving device 30, the outer circumferential surface of the wide roll R0 is irradiated with the laser beam L output from the head 41 to thereby apply the wide roll R0. Divide directly into narrow roll R1. At this time, if the laser beam L is convergent light, the head 41 is moved toward the wide roll R0 as the cutting portion becomes deep, and the focal position is adjusted to the cutting portion.

  After the first cutting for the wide roll R0 is completed in this way, the irradiation position of the laser beam L with respect to the outer peripheral surface of the wide roll R0 is shifted in the width direction, and the wide roll R0 is again moved by the raw material side driving device 30. The laser beam L output from the head 41 is irradiated to the outer peripheral surface of the wide roll R0 while rotating around the axis. Then, the wide roll R0 is again directly divided into the narrow roll R1. At that time, the width dimension of the narrow roll R1 is defined by the interval of the irradiation position of the laser beam L with respect to the outer peripheral surface of the wide roll R0.

  In this way, when the plurality of narrow rolls R1 are obtained from one wide roll R0, the plurality of narrow rolls R1 may all have the same width dimension or may have different width dimensions. Good.

  In this embodiment, the wide roll R0 has a configuration in which a sheet material S0 is wound around a cylindrical core material C0. For this reason, if the wide roll R0 is cut while leaving the core C0, a plurality of narrow rolls R1 are held on the core C0, so that the narrow roll R1 is wound in this state. You just have to start.

  Moreover, when cutting out several narrow roll R1 by a different width dimension, it cut | disconnects also including the core material C0. If it cut | disconnects in this way, when the narrow roll R1 is removed from the raw material side drive device 30, since the narrow rolls R1 are separated from each other, each of the narrow rolls R1 may be set on a predetermined winder. it can. In this embodiment, a configuration is adopted in which the tapered distal end portion of the raw material side rotating body 33 and the tapered distal end portion of the support 38 enter the inner side of the core material C0 from both sides. For this reason, even after cutting the core material C0, the wide roll R0 can be rotated.

(Main effects of this form)
As described above, in the sheet cutting apparatus 20 and the sheet cutting method according to the present embodiment, the sheet-like material S0 supplied in a roll shape is cut by the laser beam L, and the narrow sheet S1 is wound in a roll shape. A width roll R1 is obtained. For this reason, since the irradiation position of the laser beam L should be changed when changing the width dimension to be cut, unlike the method using the rotary blade, the setup work can be performed efficiently. Further, the cutting using the laser beam L has an advantage that no burrs or the like are generated at the cutting point unlike the method using the rotary blade. Moreover, in this form, since the wide roll R0 is divided | segmented into the narrow roll R1 as it is, there exists an advantage that an apparatus structure is simple.

  In this embodiment, since the laser beam L is applied to the wide roll R0 of the sheet-like material S0, the portion remaining on the wide roll R0 side can be used as it is for the next cutting.

  Further, in this embodiment, the gas generated by the irradiation of the laser beam L on the outer peripheral surface of the wide roll R0 is sucked by the dust collector 70 to prevent foreign matters from adhering to the wide roll R0 and the narrow roll R1. For this reason, even when the electrode foil for the aluminum electrolytic capacitor (cathode foil 11 and anode foil 12) is cut as the sheet-like material S0, foreign matters such as metal powder that causes a short circuit in the capacitor element 1 are applied to the narrow sheet S1. Does not adhere. Therefore, the yield when manufacturing the capacitor element 1 and the reliability of the aluminum electrolytic capacitor can be improved.

[Reference Example 2]
FIG. 3 is an explanatory view showing a main part of the sheet cutting device 20 according to Reference Example 2 of the present invention. Since the basic configuration of the sheet cutting device 20 of the present embodiment is the same as that of the reference example 1, common parts are denoted by the same reference numerals, and illustration and detailed description thereof are omitted.

  As shown in FIG. 3, the sheet cutting device 20 according to Reference Example 2 of the present invention is also driven by the raw material side to rotate the wide roll R <b> 0 in which the wide sheet-like material S <b> 0 is wound in the roll shape, as in Reference Example 1. A device 30 (indicated by an arrow T) and a laser device 40 (only a head 41 are shown) are provided. In the present embodiment, the sheet cutting apparatus 20 includes a shaft-like winding rotary body 60, and the narrow sheet S1 is wound around the winding rotary body 60 to form a narrow roll R1. A tension roller 91 or a guide roller 91 is disposed on the travel path of the narrow sheet S1 from the raw material side driving device 30 to the winding rotary body 60.

  In the sheet cutting device 20 of this embodiment, as in Reference Example 1, when the sheet material S0 is cut at an intermediate position in the width direction to obtain a narrow sheet S1 that is narrower than the sheet material S0, it is wound in a roll shape. The rotated sheet-like material S0 is cut into a narrow-width sheet S1 by a laser beam L to obtain a narrow-width roll R1 in which the narrow-width sheet S1 is wound in a roll shape.

  More specifically, first, while rotating the wide roll R0 around the axis line by the raw material side driving device 30, the laser beam L output from the head 41 is irradiated to the outer peripheral surface of the wide roll R0 to While cutting to a midway position in the radial direction, the roll rotator 60 winds the narrow sheet S1 from the wide roll R0 while winding it into a roll to obtain the narrow roll R1. When performing such cutting, also in this embodiment, the suction port 73 faces the position where the laser beam L is irradiated on the outer peripheral surface of the wide roll R0, and the laser beam L is generated on the outer peripheral surface of the wide roll R0. Gas is sucked by the dust collector 70 (see FIG. 2A).

  Thus, also in this embodiment, as in Reference Example 1, the sheet-shaped material S0 supplied in a roll shape is cut by the laser beam L to obtain a narrow roll R1 in which the narrow sheet S1 is wound into a roll shape. For this reason, since the irradiation position of the laser beam L should be changed when changing the width dimension to be cut, unlike the method using the rotary blade, the setup work can be performed efficiently. Further, the cutting using the laser beam L has an advantage that no burrs or the like are generated at the cutting point unlike the method using the rotary blade.

  Also in this embodiment, the laser beam L is applied to the wide roll R0 of the sheet-like material S0 as in Reference Example 1, so that the portion remaining on the wide roll R0 side can be used as it is for the next cutting.

  Further, in the present embodiment, the sheet-like material S0 can be surely cut even when the power of the laser beam L is small because the wide roll R0 is cut to a midway position in the radial direction.

[Embodiment]
FIG. 4 is an explanatory view showing a main part of the sheet cutting device 20 according to the embodiment of the present invention, and FIGS. 4A and 4B are each a sheet cutting device 20 according to the embodiment of the present invention. It is explanatory drawing which shows the 1st structural example and 2nd structural example. Since the basic configuration of the sheet cutting device 20 of the present embodiment is the same as that of the reference example 1, common parts are denoted by the same reference numerals, and illustration and detailed description thereof are omitted.

  As shown in FIG. 4 (a), the sheet cutting device 20 according to the embodiment of the present invention is also the same as the reference example 1, and the raw roll for rotating the wide roll R0 in which the wide sheet-shaped material S0 is wound in a roll shape. A material-side drive device 30 (indicated by an arrow T) and a laser device 40 (only the head 41 is shown) are provided. Further, the sheet cutting device 20 includes a shaft-like winding rotary body 60, and winds the narrow sheet S1 around the winding rotary body 60. A tension roller 91 or a guide roller 91 is disposed on the travel path of the narrow sheet S1 from the raw material side driving device 30 to the winding rotary body 60.

  In the sheet cutting device 20 of this embodiment, as in Reference Example 1, when the sheet material S0 is cut at an intermediate position in the width direction to obtain a narrow sheet S1 that is narrower than the sheet material S0, it is wound in a roll shape. The rotated sheet-like material S0 is cut into a narrow-width sheet S1 by a laser beam L to obtain a narrow-width roll R1 in which the narrow-width sheet S1 is wound in a roll shape.

  More specifically, first, the sheet-like material S0 is drawn out from the wide roll R0, and the drawing portion S5 of the sheet-like material S0 is irradiated with the laser beam L to cut the sheet-like material S0 into the narrow-width sheet S1. The narrow sheet R1 is obtained by winding the width sheet S1 on the outer peripheral surface of the winding rotary body 60.

  Further, in this embodiment, the emission direction of the laser beam L from the head 41 is scanned in the width direction of the sheet-like material S0, and the emission of the laser beam L from the head 41 is turned on / off in conjunction with this operation. . For this reason, since the laser beam L is irradiated to a predetermined portion in the width direction of the sheet-like material S0, a plurality of narrow rolls R1 can be obtained simultaneously from one wide roll R0. When performing such cutting, also in this embodiment, the suction port 73 faces the position where the laser beam L is irradiated on the outer peripheral surface of the wide roll R0, and the laser beam L is generated on the outer peripheral surface of the wide roll R0. Gas is sucked by the dust collector 70 (see FIG. 2A).

  Thus, also in this embodiment, as in Reference Example 1, the sheet-shaped material S0 supplied in a roll shape is cut by the laser beam L to obtain a narrow roll R1 in which the narrow sheet S1 is wound into a roll shape. For this reason, since the irradiation position of the laser beam L should be changed when changing the width dimension to be cut, unlike the method using the rotary blade, the setup work can be performed efficiently. Further, the cutting using the laser beam L has an advantage that no burrs or the like are generated at the cutting point unlike the method using the rotary blade.

  In this embodiment, the sheet material S0 is drawn from the wide roll R0 and cut by the laser beam L at the portion S5. For this reason, since the laser beam L may have a power that can cut one sheet-like material S0, the small-sized laser device 40 can reliably cut the sheet-like material S0.

  In the configuration shown in FIG. 4 (a), the number of shaft-like winding rotators 60 is one. However, as shown in FIG. 4 (b), two winding rotators 60 may be used. Good. According to such a configuration, among the narrow sheets S1 cut out from the sheet-like material S0, the odd-numbered narrow sheets S1 and the even-numbered narrow sheets S1 are each wound around the separate winding rotators 60. be able to.

[Reference Example 3]
FIG. 5 is an explanatory view showing a main part of the sheet cutting device 20 according to Reference Example 3 of the present invention. Since the basic configuration of the sheet cutting device 20 of the present embodiment is the same as that of the reference example 1, common parts are denoted by the same reference numerals, and illustration and detailed description thereof are omitted.

  In FIG. 5, the sheet cutting device 20 of this embodiment is also a raw material side drive device 30 (indicated by an arrow T) that rotates a wide roll R <b> 0 obtained by winding a wide sheet-like material S <b> 0 in a roll shape, as in the embodiment. And a laser device 40 (only the head 41 is shown). Further, in this embodiment, a shaft-like winding rotary body 60 is provided, and the narrow sheet S <b> 1 is wound around the winding rotary body 60. A tension roller 91 or a guide roller 91 is disposed on the travel path of the narrow sheet S1 from the raw material side driving device 30 to the winding rotary body 60.

  Also in the sheet cutting device 20 of this embodiment, the sheet-like material S0 is pulled out from the wide roll R0, and the drawing portion S5 of the sheet-like material S0 is irradiated with the laser beam L to narrow the sheet-like material S0. The narrow sheet S1 is wound around the outer peripheral surface of the winding rotary body 60 while being cut into the sheet S1 to obtain a narrow roll R1. At that time, in the embodiment, the laser beam L is irradiated to a plurality of portions in the width direction of the sheet-like material S0, but in this embodiment, the laser beam L is irradiated to one portion in the width direction of the wide roll R0. When performing such cutting, also in this embodiment, the suction port 73 faces the position where the laser beam L is irradiated on the outer peripheral surface of the wide roll R0, and is generated by cutting with the laser beam L on the outer peripheral surface of the wide roll R0. The sucked gas is sucked by the dust collector 70 (see FIG. 2A).

  Thus, also in this embodiment, similarly to the embodiment, cutting with the laser beam L is performed at the drawing portion S5 of the sheet-like material S0 from the wide roll R0. For this reason, since the laser beam L may have a power capable of cutting one sheet-like material S0, the small-sized laser device 40 can reliably cut the sheet-like material S0.

  In the example shown in FIG. 5, two types of narrow sheets S1 (thin width roll R1) having different width dimensions are obtained, and the narrow width sheet S1 (thin width roll R1) having a wide width dimension is as it is. Although it may be used for manufacturing the capacitor element 1 for a large-sized aluminum electrolytic capacitor, it may be used for manufacturing the narrow sheet S1 (the narrow roll R1) having a narrower width dimension by setting it on the raw material side driving device 30. .

[Another embodiment]
In the reference examples 2 and 3, and the embodiment, a configuration in which the narrow sheet S1 is drawn from the wide roll R0 is adopted. For this reason, the laser beam L is irradiated from the laser device 40 shown in FIG. 2 or a laser device different from the laser device 40 shown in FIG. 2 to remove foreign matters from the surface of the narrow roll R1, or the surface of the narrow roll R1. Marking such as lot number may be performed. The removal of foreign matters from the surface of the narrow roll R1 means that when the lead terminal 17 described with reference to FIG. 1 is connected to the anode foil 12, the etching layer or This is a process for removing the anodized film. If this process is performed, the lead terminal 17 and the anode foil 12 can be suitably connected. Further, when the lead terminal 17 described with reference to FIG. 1 is connected to the cathode foil 11, if the etching layer is removed from the portion where the lead terminal 17 is connected by irradiation with the laser beam L, the lead terminal 17 and the cathode are connected. The foil 11 can be suitably connected.

[Other embodiments]
In the embodiment described above, the capacitor electrode foil (the anode foil 12 and the cathode foil 11) has been described as an example of the sheet-like material S0. The present invention may be applied to.

  In the above embodiment, the sheet-like material S0 used for manufacturing the wound capacitor shown in FIG. 1 has been described as an example. However, the sheet-like material for an electric double layer capacitor (electrode foil, separator, element stopper tape) Alternatively, the present invention may be applied to cutting other sheet-like materials.

DESCRIPTION OF SYMBOLS 1 Capacitor element 11 Cathode foil 12 Anode foil 14 Separator 17 Lead terminal 19 Adhesive tape 20 Sheet cutting device 30 Raw material side drive device 33 Raw material side rotary body 40 Laser device 41 Head 60 Hoisting rotary body 70 Dust collector 73 Dust collector Device suction port L Laser beam R0 Wide roll R1 Narrow roll S0 Sheet material S1 Narrow sheet

Claims (9)

In the sheet cutting method of obtaining a narrow sheet having a narrower width than the sheet-like material by cutting the sheet-like material at an intermediate position in the width direction,
The sheet-like material is drawn out from a wide roll obtained by winding the sheet-like material in a roll shape, and a laser beam is irradiated to a plurality of positions in the width direction of the drawing-out portion of the sheet-like material, and both ends in the width direction are irradiated by the laser beam. A sheet cutting method characterized in that a thin roll is obtained by winding the narrow sheet from which the material has been cut into a roll.   When irradiating the laser beam to a plurality of positions in the width direction of the extraction portion, the emission direction of the laser beam is scanned in the width direction of the extraction portion while turning on and off the emission of the laser beam. The sheet cutting method according to claim 1.   The sheet cutting method according to claim 1 or 2, wherein the sheet material is cut while sucking a position of the sheet material irradiated with the laser beam.   The surface of the sheet-like material or the surface of the narrow sheet is irradiated with the laser beam or a laser beam different from the laser beam to remove foreign matter from the surface or to mark the surface. The sheet cutting method according to any one of claims 1 to 3, wherein:   5. The sheet cutting method according to claim 1, wherein the sheet-like material is a capacitor electrode foil, a capacitor separator, and a capacitor element-stopping adhesive tape. 6. A sheet cutting apparatus for carrying out the sheet cutting method according to claim 1,
A winding rotary body for winding up the sheet-like material drawn from the wide roll into a roll;
Laser beam is irradiated to a plurality of portions in the width direction of the drawing portion of the sheet-like material from the wide roll, and the narrow sheet cut at both ends in the width direction by the laser beam is applied to the winding rotating body. A laser device that is wound up as a narrow roll;
A sheet cutting apparatus comprising:   When irradiating the laser beam to a plurality of positions in the width direction of the extraction portion, the laser device scans the emission direction of the laser beam in the width direction of the extraction portion while turning on / off the emission of the laser beam. The sheet cutting device according to claim 6, wherein   Removal of foreign matter from the surface or marking on the surface by irradiating the surface of the sheet-like material or the surface of the narrow sheet with a laser beam from the laser device or a laser device different from the laser device The sheet cutting device according to claim 6 or 7, wherein:   The sheet cutting device according to any one of claims 6 to 8, wherein the sheet-like material is a capacitor electrode foil, a capacitor separator, and a capacitor element fixing adhesive tape.

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