JP5457996B2 - Cutting device and winding device - Google Patents

Description

  The present invention relates to a cutting device for cutting a workpiece such as an electrode sheet used for a secondary battery, for example, and a winding device including the same.

  For example, a battery element used as a secondary battery such as a lithium ion battery has an electrode material (positive electrode sheet) coated with a positive electrode active material and an electrode sheet (negative electrode sheet) coated with a negative electrode active material. It is manufactured by being wound in a state of being overlapped via a separator sheet made of (for example, a resin film or a non-woven fabric).

  In the winding device for manufacturing the battery element, each of the sheets supplied from the roll wound in a roll is conveyed along a separate conveyance path, and finally provided in each conveyance path. It is sent to the winding mechanism as needed by the feeding mechanism. Then, when winding of one battery element is almost completed by the winding mechanism, the rotation of the winding mechanism is temporarily stopped, and each sheet is gripped by the gripping means of each supply mechanism, and then each conveyance path is Each sheet is cut by the cutting device provided in the sheet. Thereafter, winding of the battery element is completed by completely winding up the remaining winding portion of each sheet.

  A cutting device that cuts each sheet includes, for example, a fixed blade and a movable blade, and is configured to sandwich the sheet by rotating the movable blade toward the fixed blade (see, for example, Patent Document 1).

  In such a configuration, if the movable blade escapes to the outside during sheet cutting, the sharpness is impaired, and burrs or the like are generated at the sheet cutting portion, which may cause a reduction in product quality.

  In order to prevent this, conventionally, a strong preload is applied to the movable blade, and the sheet is cut while the movable blade is pressed against the fixed blade (see, for example, Patent Document 2).

JP 2009-249176 A JP 2001-160397 A

  However, in the prior art, since the movable blade and the fixed blade are opened and closed while always in pressure contact, the two blades frequently rub against each other, and each blade is likely to be worn or chipped. As a result, there is a possibility that the life of the cutting device may be shortened, for example, the sharpness of the blade is deteriorated in a short period of time.

  The present invention has been made in view of the above circumstances, and it is a main object of the present invention to provide a cutting device capable of suppressing blade wear and the like and extending its life, and a winding device including the cutting device. It is one.

  Hereinafter, each means suitable for solving the above-described problem will be described separately. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1 . A cutting device comprising a predetermined fixed blade and a movable blade pivotally supported with respect to the predetermined fixed blade, and sandwiching the workpiece by the both blades,
A movable member that operates in parallel with the axial direction of the rotation axis of the movable blade and is capable of pressing the movable blade;
A drive mechanism for driving the movable member;
When cutting the workpiece by closing both the blades, the movable member is pressed against the fixed blade with a predetermined pressure by pressing the movable member against the movable blade,
When opening the both blades after cutting the workpiece, the cutting device reduces the contact pressure of the both blades to be lower than the predetermined pressure by moving the movable member in a direction away from the movable blade. .

More specifically, for example, a spring member that biases the movable member in a direction away from the movable blade is provided, and when the workpiece is cut, the movable blade is pressed with a relatively strong force in a state where the spring member is compressed by about 50%. However, when the movable blade is opened, a configuration in which the movable member comes into contact with the movable blade with a relatively weak force in a state where the spring member is compressed by about 0 to 10% can be cited.
According to the means 1, the workpiece can be cut while the blades are pressed against each other, and after cutting the workpiece, the blades can be opened with the contact pressure between the blades weakened. In this way, by changing the contact pressure between the two blades between when the two blades are closed and when the two blades are opened, it is possible to reduce the frequency with which the two blades rub against each other strongly. As a result, blade wear and the like can be suppressed, and the life of the device can be extended. On the other hand, when cutting the workpiece, both the blades can be brought into pressure contact with a constant pressure as in the prior art, so that deterioration of product quality can be suppressed.

Means 2 . 4. The cutting device according to claim 3, further comprising biasing means that elastically contacts the movable blade and biases the movable blade in a direction away from the fixed blade.

According to the means 2 , it is possible to further enhance the effects claimed by the means 1 and the like. Usually, in order to perform a smooth opening / closing operation, the movable blade is assembled with a certain clearance from the fixed blade. For this reason, when opening the movable blade, if the contact pressure between both blades is too weak, the operation of the movable blade at the time of opening may be unstable. On the other hand, according to this means 2 , the play of the movable blade can be suppressed and the operation can be stabilized. As a result, it is possible to suppress the occurrence of chipping or the like at the blade edge.

Means 3 . 3. The cutting apparatus according to means 1 or 2 , wherein the workpiece is an electrode sheet coated with an active material.

  When an electrode sheet coated with an active material is an object to be cut, in a conventional cutting device, when the movable blade is opened after cutting, the movable blade strongly rubs the end surface of the cut electrode sheet, and the active material is peeled off. There is a risk of it. As a result, the product quality may be deteriorated. On the other hand, the occurrence of such a problem can be reduced by adopting the configuration of the means 1 or the like.

Means 4 . Winding means capable of winding a belt-like sheet conveyed as the workpiece;
A winding device comprising the cutting device according to any one of means 1 to 3 .

  In the case where burrs are generated at the sheet cutting portion or when the active material peeling powder is mixed in the winding element, a problem such as a short circuit may occur, leading to a reduction in product quality. On the other hand, by providing the cutting device, it is possible to suppress the occurrence of such problems and improve the product quality.

It is a cross-sectional schematic diagram for showing the structure of the battery element in one Embodiment. It is a front schematic diagram which shows a winding mechanism. It is a schematic diagram which shows schematic structure of a winding apparatus and an electrode sheet conveyance mechanism. (A) is a front view which shows the cutting device with the movable blade closed, and (b) is a front view showing the cutting device with the movable blade open. (A) is a top view which shows the cutting device when a movable blade closes, (b) is a front view which shows the cutting device when a movable blade opens. (A), (b) is the front view and top view which show the cutting device in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. First, the structure of the lithium ion battery element as a winding element obtained by the winding device of this embodiment will be described.

  As shown in FIG. 1, a lithium ion battery element (hereinafter referred to as “battery element”) 1 has two separator sheets 3 and 4, a positive electrode sheet 5, and a negative electrode with respect to a cylindrical core core 2. A belt-like body 7 constituted by the electrode sheet 6 is wound. In FIG. 1, for convenience of explanation, there are places where the separator sheets 3 and 4, the positive electrode sheet 5, and the negative electrode sheet 6 are spaced apart from each other.

  In the present embodiment, the core core 2 is formed of a material having sufficient rigidity (for example, a metal material such as aluminum or a resin material such as polypropylene (PP)). Further, the core core 2 has an insertion hole 8 having a non-circular cross section (in this embodiment, a square cross section).

  The separator sheets 3 and 4 have the same width as the length along the longitudinal direction of the core core 2, so as to prevent different electrode sheets 5 and 6 from contacting each other and causing a short circuit. Insulators, in particular in the present embodiment, are made of PP.

  Similarly to the separator sheets 3 and 4, the electrode sheets 5 and 6 also have substantially the same width as the length along the longitudinal direction of the core 2. The electrode sheets 5 and 6 are made of a thin plate-like metal sheet, and active materials are applied to both the front and back surfaces at regular intervals. Specifically, for example, an aluminum foil sheet is used for the positive electrode sheet 5, and the positive electrode active material is applied to both the front and back surfaces at regular intervals. For example, a copper foil sheet is used for the negative electrode sheet 6, and the negative electrode active material is applied to both the front and back surfaces at regular intervals. Leads (not shown) are welded to the electrode sheets 5 and 6.

  When obtaining a lithium ion battery, the battery element 1 is disposed in a metallic battery container (not shown) and the lead on the positive electrode side and the lead on the negative electrode side are combined. Then, the collected positive side lead is connected to a positive terminal component (not shown), and the same negative side lead is connected to a negative terminal component (not shown). A lithium ion battery can be obtained by providing the opening at both ends of the container.

  Next, a winding device for manufacturing the battery element 1 will be described.

  As shown in FIG. 3, the winding device 60 includes an electrode sheet conveyance mechanism 61 that conveys the positive electrode sheet 5, an electrode sheet conveyance mechanism 62 that conveys the negative electrode sheet 6, and a separator sheet conveyance that conveys the separator sheets 3 and 4. Mechanisms 63 and 64 are provided. The sheets conveyed by the sheet conveying mechanisms 61 to 64 are wound so that the sheets overlap each other in a winding mechanism 65 serving as a winding unit.

  As shown in FIG. 2, the winding mechanism 65 includes a turret 12 that is rotatably provided. The turret 12 is configured such that two disk-shaped tables 14 and 15 are opposed to each other, and the rotating unit 20 is symmetric about the centers of the tables 14 and 15 across the tables 14 and 15. Two centers are provided. Both tables 14 and 15 (turret 12) are configured to rotate clockwise and are set so that both tables 14 and 15 rotate synchronously. Thereby, each rotation part 20 (core 21) can move between the attachment / detachment position P1 and the winding position P2. Note that the tables 14 and 15 may be reversible by 180 °.

  Moreover, in this embodiment, the attachment / detachment apparatus 13 for attaching the core core 2 and removing the battery element 1 is provided corresponding to the attachment / detachment position P1.

  On the other hand, the winding position P2 is a position where the belt-like body 7 is wound around the core core 2, and each of the sheet conveying mechanisms 61 to 64 is connected to the rotating unit 20 located at the winding position P2. A sheet is supplied.

  In the present embodiment, separator fixing means (not shown) is provided corresponding to the winding position P2. The separator fixing means is configured to be able to attach the leading end portions of the separator sheets 3 and 4 to the surface of the core core 2 by, for example, heat welding in the initial stage of winding. Of course, it is possible to use a configuration in which the tip portions of the separator sheets 3 and 4 are simply attached to the surface of the core core 2 using an adhesive tape or the like.

  Each of the sheet conveying mechanisms 61 to 64 is configured such that each sheet can be drawn out from the roll wound in a roll shape and supplied to the rotating unit 20. Since the electrode sheet conveyance mechanism 61 that conveys the sheet 5 and the electrode sheet conveyance mechanism 62 that conveys the negative electrode sheet 6 are characterized, the electrode sheet conveyance mechanism 62 will be described in detail below as an example.

  On the most upstream side of the electrode sheet transport mechanism 62, an original fabric 70 around which the negative electrode sheet 6 is wound in a roll shape is rotatably supported. A tension applying means 72 is provided in the middle of the conveyance path of the negative electrode sheet 6 from the original fabric 70 to the winding mechanism 65 (rotating unit 20). The tension applying means 72 in this embodiment includes a pair of rollers 73 and 74 and a step roller 75 provided between the rollers 73 and 74.

  Further, a sheet supply mechanism 80, a detection sensor 81, and a cutting device 82 are provided in this order from the upstream side in the conveyance path of the negative electrode sheet 6 from the tension applying means 72 to the winding mechanism 65.

  The sheet supply mechanism 80 includes a pair of upper and lower chucks 80a and 80b. The sheet supply mechanism 80 includes a chuck actuator (not shown) (for example, a motor or a cylinder), so that the chucks 80a and 80b can be opened and closed.

  The sheet supply mechanism 80 is configured to be able to advance and retract along the conveyance path of the negative electrode sheet 6. More specifically, the sheet supply mechanism 80 can be moved between a retracted position separated by a considerable distance from the winding mechanism 65 and a closest position closest to the winding mechanism 65 by an actuator (for example, a motor) (not shown). It is configured. The closest approach position is a position that is close enough to start winding of the tip of the negative electrode sheet 6 held by the chucks 80 a and 80 b based on the rotation of the rotating unit 20.

  The detection sensor 81 detects a boundary portion between the active material application portion and the active material non-application portion on the negative electrode sheet 6.

  The cutting device 82 includes a fixed blade 91 positioned below the negative electrode sheet 6 as a work and a movable blade 92 positioned above the negative electrode sheet 6 as described later, and has a function of cutting the negative electrode sheet 6. .

  The above is the description of the electrode sheet conveyance mechanism 62, but the electrode sheet conveyance mechanism 61 that conveys the positive electrode sheet 5 also has the same configuration as described above. Various mechanisms in the winding device 60 such as the winding mechanism 65 and the sheet conveying mechanisms 61 to 64 are configured to be controlled by a control device (not shown).

  Here, the configuration of the cutting device 82 will be described in detail with reference to FIGS. 4A is a front view showing the cutting device 82 with the movable blade 92 closed, and FIG. 4B is a front view showing the cutting device 82 with the movable blade 92 open. FIG. 5A is a plan view showing the cutting device 82 when the movable blade 92 is closed, and FIG. 5B is a front view showing the cutting device 82 when the movable blade 92 is opened.

  The cutting device 82 includes a long fixed blade 91 fixed on the pedestal portion 90, and a long movable blade 92 that is rotatably connected to the fixed blade 91 via a fulcrum shaft 93. I have.

  On the base end side of the movable blade 92, an operation piece 94 is integrally formed extending in the direction opposite to the blade edge with the fulcrum shaft 93 interposed therebetween. The distal end portion of the operation piece 94 is connected to the first drive mechanism 95.

  The first drive mechanism 95 includes a mounting base 95a fixed to the pedestal portion 90, an air cylinder 95b disposed above the operation piece 94 by the mounting base 95a, and a rod 95c moved up and down by the air cylinder 95b. And.

  The rod 95c is connected to the distal end portion of the operation piece 94, and the movable blade 92 rotates about the fulcrum shaft 93 as the rod 95c moves up and down.

  On the back side of the operation piece 94, a second drive mechanism 100 is provided as a pressing unit and a decompression unit. The second drive mechanism 100 is attached to a base base 99 that is connected to the base end side of the fixed blade 91. Hereinafter, the second drive mechanism 100 will be described in detail.

  The base base 99 is formed with a through-hole 101 having a circular cross section penetrating in the front-rear direction. A substantially cylindrical pusher 102 as a movable member is inserted into the through hole 101.

  A flange 103 is formed to protrude around the rear end of the pusher 102. A coil spring 105 is mounted around the pusher 102 main body between the flange 103 and the base base 99.

  A ball plunger 106 is fitted into the tip of the pusher 102. The ball plunger 106 has a known structure having a coil spring housed in the case, a ball urged toward the tip by the coil spring, and the like.

  A pair of support columns 107 extending rearward from the base base 99 are provided on the left and right sides of the pusher 102. An air cylinder 110 is fixed to the rear end of the support column 107. The rod 111 driven in the front-rear direction by the air cylinder 110 is configured to act on the pusher 102.

  Next, the manufacturing method of the battery element 1 by the winding device 60 described above will be described.

  First, one rotator 20 is moved to the attachment / detachment position P1 by rotating the turret 12 halfway clockwise. At this time, the other rotating body 20 is positioned at the winding position P2. For example, the rotating body 20 that has been positioned at the winding position P <b> 2 until the winding of the belt-like body 7 is almost completed is moved to the attachment / detachment position P <b> 1. On the other hand, the rotating body 20 that has been positioned at the attachment / detachment position P1 and on which the new core core 2 is mounted is moved to the winding position P2.

  In the rotating body 20 located at the winding position P2, the core core 2 is mounted, but nothing is wound around the core core 2 at the beginning. In this state, first, the tip end portions of the separator sheets 3 and 4 are attached and fixed to the surface of the core core 2 by the separator fixing means described above.

  Subsequently, at the winding position P2, the rotating body 20 (core 21) is rotated. When the predetermined timing arrives, the sheet supply mechanisms 80 of the electrode sheet conveyance mechanisms 61 and 62 are operated, and the electrode sheets 5 and 6 are supplied toward the core 2.

  More specifically, each of the electrode sheets 5 and 6 whose tip portions have been gripped by the chucks 80a and 80b are moved toward the rotating body 20 by moving the sheet supply mechanism 80 (chuck 80a and 80b) to the core. Supplied toward the core 2. As a result, the tips of the electrode sheets 5 and 6 are sandwiched between the separator sheets 3 and 4, and the electrode sheets 5 and 6 are wound up in an insulated state through the separator sheets 3 and 4, respectively. Will start.

  When the winding of the electrode sheets 5 and 6 is started, the chucks 80a and 80b are opened. Thereby, the electrode sheets 5 and 6 are wound together with the separator sheets 3 and 4 while being given a predetermined tension by the tension applying means 72.

  As the chucks 80a and 80b are opened, the sheet supply mechanism 80 moves somewhat upstream (side away from the rotator 20) and stands by at that position during winding.

  When the winding of the belt-like body 7 is almost completed, the rotation of the rotating unit 20 is temporarily stopped. The timing of the stop is determined based on the detection result of the detection sensor 81, that is, the detection result of the boundary portion between the active material application portion and the active material non-application portion on the negative electrode sheet 6. Accordingly, the rotation of the rotating unit 20 is stopped at the timing when the predetermined cutting position is positioned at the position of the cutting device 82.

  Once the rotation of the rotating unit 20 is stopped, the electrode sheets 5 and 6 are gripped by the chucks 80 a and 80 b of the sheet supply mechanism 80, and then the electrode sheets 5 and 6 are cut by the cutting device 82.

  Then, after rotating the rotating part 20 somewhat, the separator sheets 3 and 4 are also cut. Then, the remaining strip 7 (sheets 3 to 6) that has been cut is completely wound up, and the winding is completed by tape-fastening the separator sheets 3 and 4 on the outer peripheral side.

  Then, the battery element 1 is obtained by moving the rotating body 20 and the like to the attachment / detachment position P1 and then removing the core core 2 around which the belt-like body 7 is wound.

  Here, the operation of the cutting device 82 will be described in more detail. As described above, when the predetermined cutting position of the electrode sheets 5 and 6 is positioned between the fixed blade 91 and the movable blade 92, the first drive mechanism 95 is driven and the air cylinder 95b raises the rod 95c. As a result, the tip of the operation piece 94 is pulled upward, and the movable blade 92 rotates in the clockwise direction of FIG. 4 with the fulcrum shaft 93 as a fulcrum.

  At the same time, in the second drive mechanism 100, the air cylinder 110 moves the rod 111 forward and pushes the pusher 102 forward against the coil spring 105.

  When the pusher 102 is pushed forward, the ball plunger 106 attached to the tip of the pusher 102 is pushed against the operation piece 94. Since a slight clearance is provided between the fixed blade 91 and the movable blade 92, the pusher 102 (ball plunger 106) pushes the operation piece 94 forward, so that the movable blade 92 is substantially centered about the fulcrum shaft 93. It is slightly rotated in the horizontal direction (counterclockwise direction in FIG. 5A) and pressed against the fixed blade 91.

  As a result, the movable blade 92 rotates while being pressed against the fixed blade 91, and cuts the electrode sheets 5 and 6.

  On the other hand, when the cutting of the electrode sheets 5 and 6 is finished, in the first drive mechanism 95, the air cylinder 95b lowers the rod 95c. As a result, the tip of the operation piece 94 is pulled downward, and the movable blade 92 rotates counterclockwise in FIG. 4 with the fulcrum shaft 93 as a fulcrum.

  At the same time, in the second drive mechanism 100, the air cylinder 110 moves the rod 111 rearward, so that the pusher 102 is pushed back by the restoring force of the coil spring 105.

  When the pusher 102 is pushed back, the ball plunger 106 attached to the tip of the pusher 102 is separated from the operation piece 94.

  As a result, the contact pressure between the two blades 91 and 92 is weakened, and the movable blade 92 rotates without rubbing strongly with the fixed blade 91 and returns to the original position (see FIG. 5B).

  As described above in detail, in the present embodiment, the electrode sheets 5 and 6 are cut while the blades 91 and 92 are pressed, and the contact pressure of the blades 91 and 92 is reduced after the electrode sheets 5 and 6 are cut. Can open both blades 91, 92. In this way, by changing the contact pressure between the blades 91 and 92 between when the blades 91 and 92 are closed and when the blades 91 and 92 are opened, the frequency with which the blades 91 and 92 are rubbed strongly can be reduced. As a result, wear and the like of both the blades 91 and 92 can be suppressed, and the life of the cutting device 82 can be extended. On the other hand, when the electrode sheets 5 and 6 are cut, both the blades 91 and 92 can be brought into pressure contact with a constant pressure as in the prior art, so that deterioration in product quality can be suppressed.

  Furthermore, according to this embodiment, since it is not necessary to consider almost the contact pressure of the said both blades 91 and 92 when the both blades 91 and 92 open, when cutting the electrode sheets 5 and 6, with respect to the movable blade 92 conventionally, In addition, it is possible to apply a stronger preload and further improve the product quality.

  Moreover, in this embodiment, when the movable blade 92 is opened after the electrode sheets 5 and 6 are cut, the movable blade 92 does not strongly rub the end surfaces of the cut electrode sheets 5 and 6. Peeling is reduced and product quality can be improved.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the battery element 1 of the lithium ion battery is manufactured by the winding device 60, but the winding element manufactured by the winding device 60 is not limited to this, for example, A winding element such as a lithium ion capacitor or an electrolytic capacitor may be manufactured.

  (B) In the said embodiment, although the battery element 1 is materialized about the case where the core core 2 is comprised, as a case where the type of battery element which does not have the said core core 2 is obtained is materialized. Also good. Further, the outer peripheral shape of the core core 2 may be, for example, a flat non-circular cross section.

  (C) The configuration of the winding device 60 (the electrode sheet conveyance mechanisms 61 and 62, the winding mechanism 65, etc.) in the above embodiment is merely an example, and other configurations may be adopted.

  For example, in the above embodiment, the cutting device 82 according to the present invention is provided only in the electrode sheet transport mechanisms 61 and 62. However, the cutting device of the separator sheet transport mechanisms 63 and 64 is the cutting device 82, and The separator sheets 3 and 4 may be cut by the cutting device 82.

  (D) In the cutting device 82 of the above-described embodiment, the pusher 102 is separated from the operation piece 94 when the movable blade 92 is opened. For example, when the electrode sheets 5 and 6 are cut, the operation piece 94 is pressed with a relatively strong force while the coil spring 105 is compressed by about 50%, and the pusher 102 is pressed when the movable blade 92 is opened. However, the coil spring 105 may be compressed about 0 to 10% without being separated from the operation piece 94.

  (E) The cutting device 82 of the above embodiment is configured to change the contact pressure between the movable blade 92 and the fixed blade 91 by operating only the movable blade 92. Not only this but the structure which can operate the fixed blade 91, It is good also as a structure which operates both the movable blade 92 and the fixed blade 91, and changes the contact pressure of both the blades 91 and 92, respectively.

  (F) In the cutting device 82 of the above-described embodiment, the second driving mechanism 100 operates the proximal end side (operation piece 94) of the movable blade 92 to change the contact pressure between the movable blade 92 and the fixed blade 91. It has become. Not only this but the structure which changes the contact pressure of both the blades 91 and 92 by operating the front end side of the movable blade 92 is good.

  (G) In the cutting device 82 of the above embodiment, the first drive mechanism 95 and the second drive mechanism 100 are configured to be driven by the air cylinders 95b and 110. You may employ | adopt the structure driven by a means.

  (H) The cutting device 82 according to the above embodiment includes the first drive mechanism 95 that rotates the movable blade 92 and the second drive mechanism 100 that changes the contact pressure of the movable blade 92 separately. However, the present invention is not limited to this, and a configuration in which a drive mechanism that drives the movable blade 92 repeatedly and a drive mechanism that changes the contact pressure of the movable blade 92 may be integrated.

  (I) In the cutting device 82 of the above-described embodiment, a drive mechanism as a pressing unit that presses the movable blade 92 against the fixed blade 91, and a drive mechanism as a decompression unit that weakens the contact pressure between the blades 91 and 92 by the drive mechanism. However, the second drive mechanism 100 is integrally formed.

  However, the present invention is not limited to this, and the drive mechanism as the pressing means and the drive mechanism as the decompression means may be provided separately, or a mechanism for assisting the second drive mechanism 100 may be provided separately.

  For example, as shown in FIGS. 6A and 6B, in addition to the configuration of the above-described embodiment, the movable blade 92 is elastically contacted with the movable blade 92 on the distal end side of the movable blade 92 with respect to the fulcrum shaft 93. It is good also as a structure provided with the ball plunger 120 as an urging means which urges | biases to the direction away from the fixed blade 91. FIG.

  As described in the above embodiment, normally, the fixed blade 91 is assembled with a certain amount of clearance with respect to the movable blade 92 in order to perform an opening / closing operation. For this reason, when the movable blade 92 is opened, if the contact pressure between the two blades 91 and 92 is too weak, the operation of the movable blade 92 at the time of opening may be unstable. On the other hand, according to the configuration of FIG. 6, rattling of the movable blade 92 can be suppressed and the operation can be stabilized. As a result, it is possible to suppress the occurrence of chipping or the like at the blade edge.

  (J) In the above-described embodiment, the cutting device 82 according to the present invention is embodied as a configuration provided in the winding device 60 for manufacturing the battery element 1. Alternatively, it may be embodied as a configuration assembled to something other than the winding device. Of course, the cutting device 82 can be used alone.

  (K) In the cutting device 82 of the above embodiment, the movable blade 92 rotates with respect to the fixed blade 91. However, the configuration is not limited thereto, and other configurations may be used. For example, the movable blade 92 may be driven linearly with respect to the fixed blade 91, and the two blades 91 and 92 may be relatively displaced in the linear direction.

  DESCRIPTION OF SYMBOLS 1 ... Battery element, 3, 4 ... Separator sheet, 5 ... Positive electrode sheet, 6 ... Negative electrode sheet, 7 ... Band-shaped body, 60 ... Winding device, 61, 62 ... Electrode sheet conveyance mechanism, 65 ... Winding mechanism, DESCRIPTION OF SYMBOLS 82 ... Cutting device, 91 ... Fixed blade, 92 ... Movable blade, 93 ... Supporting shaft, 94 ... Operation piece, 95 ... 1st drive mechanism, 100 ... 2nd drive mechanism, 101 ... Through-hole, 102 ... Pusher, 103 ... Flange, 105 ... coil spring, 106 ... ball plunger, 110 ... air cylinder, 111 ... rod.

Claims (4)

A cutting device comprising a predetermined fixed blade and a movable blade pivotally supported with respect to the predetermined fixed blade, and sandwiching the workpiece by the both blades,
A movable member that operates in parallel with the axial direction of the rotation axis of the movable blade and is capable of pressing the movable blade;
A drive mechanism for driving the movable member;
When cutting the workpiece by closing both the blades, the movable member is pressed against the fixed blade with a predetermined pressure by pressing the movable member against the movable blade,
When opening the both blades after cutting the workpiece, the cutting device reduces the contact pressure of the both blades to be lower than the predetermined pressure by moving the movable member in a direction away from the movable blade. . The cutting apparatus according to claim 1 , further comprising an urging unit that elastically contacts the movable blade and urges the movable blade in a direction away from the fixed blade. The workpiece, the cutting device according to claim 1 or 2 active material is characterized in that an electrode sheet coated. Winding means capable of winding a belt-like sheet conveyed as the workpiece;
A winding device comprising the cutting device according to any one of claims 1 to 3 .

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