JP2007001742A - Winding device and electrode manufacturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding device capable of controlling a position of a ball of a ball clutch mechanism provided on a winding shaft body, and an electrode cutting device using the winding device. <P>SOLUTION: A wide electrode is cut into, for example, six narrow electrodes, and individually wound around a reel. The winding shaft body 220 which is made from nonmagnetic material and has a circular cross section is inserted in the reel. The winding shaft body 220 is rotated by a motor, and the winding shaft body 220 and the reel is coupled by the ball clutch mechanism 240 including a guiding groove 241 and a magnetic ball 242. The narrow electrodes are wound up while rotating the reel. By providing a magnet 250 in the vicinity of a non-operating position P1 of the guiding groove 241, the magnetic ball 242 is held at the non-operating position P1 of the guiding groove 241 when the ball clutch mechanism 240 is not operated. The magnetic ball 242 does not uselessly move when the reel is taken out/inserted from/into the winding shaft body 220, thereby making taking-out/inserting easy. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for winding a sheet material such as a strip electrode used for a battery onto a reel and an electrode manufacturing device using the same, and more particularly, a ball clutch for performing a connection between a reel and a winding shaft. The present invention relates to a winding device and an electrode manufacturing device provided with a mechanism.

  With the development of portable electronic devices, batteries have become an important part of the drive power supply. In the manufacturing process of this battery, a wide belt-like electrode serving as a positive electrode or a negative electrode is cut into a plurality of strips and individually wound on a reel (for example, see Patent Document 1). The strip electrode wound around the reel is stacked and wound with a separator in between, and then stored in a metal can or the like.

  FIG. 18 shows an example of a conventional winding device. In this winding device, for example, three reels 510 are attached to a winding shaft main body 520 having a circular cross section, and the winding shaft main body 520 is rotationally driven by a motor 530, whereby the cut narrow electrodes 500A are individually attached to the reel 510. It is to be wound up. The winding shaft 520 is provided with a connection mechanism with the reel 510, and the rotation of the winding shaft 520 is transmitted to the reel 510 by this connection mechanism so that the reel 510 can be rotated together with the winding shaft 520. . Conventionally, as a coupling mechanism, a ball clutch (for example, see Patent Document 2) or an eddy current clutch (for example, see Patent Document 3) is known.

FIG. 19 shows an example of a winding body provided with a conventional ball clutch mechanism. This ball clutch mechanism 540 is provided with a guide groove 541 in the rotation direction on the outer peripheral surface C1 of the winding shaft main body 520, and a ball 542 is movably fitted in the guide groove 541. When the reel main body 520 is rotated in the direction of arrow A, the ball 542 moves in the reverse direction in the guide groove 541 and comes into contact with the reel 510 to connect the reel main body 520 and the reel 510. A ball stopper 543 is attached to the exit of the guide groove 541 so that the ball 542 does not jump out.
Japanese Patent Laid-Open No. 61-174052 JP 2001-287856 A Japanese Utility Model Publication 2-37589

  However, in the winding shaft 520 using the conventional ball clutch mechanism 540, the position of the ball 542 is not controlled, and the ball 542 in the guide groove 541 has its own weight or the winding shaft main body 520 as shown in FIG. In some cases, the ball 542 is moved by rotation, and the ball 542 protrudes from the outer peripheral surface C1 of the reel body 520 so that the virtual diameter of the reel body 520 becomes larger than the inner diameter of the reel 510. Therefore, when the reel 510 is inserted / removed while automatically rotating the winding shaft 520 in the reverse direction, the reel 510 hits the ball 542 and is difficult to insert / remove, which causes noise. Further, the guide groove 541 is damaged and spreads, and the ball 542 may spill out.

  Further, the conventional ball clutch mechanism 540 has a problem that the inner diameter of the connectable reel 510 is limited. For example, when the diameter of the reel body 520 when the ball 542 moves to the deepest position of the guide groove 541 is 75 mm, the inner diameter of the connectable reel 510 is at most about 75.5 mm, and the diameter of 76 mm is It cannot be connected. This increases the gap between the reel body 520 and the reel 510 and the gap between the ball 542 and the reel 510, and the reel 510 moves the ball 542 to the operating position of the guide groove 541 even if the reel body 520 is rotated. This is because the frictional force does not act on the ball 542.

  Another problem also arises because the inner diameter of the connectable reel 510 is limited. That is, the inner diameter of the reel 510 is narrowed by the pressure of the narrow electrode 500A wound around the reel 510 and becomes smaller than the diameter of the reel body 520, and the reel 510 that has finished winding cannot be removed from the reel body 520. There was a case.

  The present invention has been made in view of such a problem, and an object thereof is to provide a winding device capable of controlling the position of a ball of a ball clutch mechanism provided on a winding shaft body, and an electrode using the winding device. It is to provide a manufacturing apparatus.

The winding device according to the present invention has the following requirements (A) to (D).
(A) A reel having a winding portion for a sheet material on the outer peripheral surface and a cylindrical portion having an inner periphery serving as a friction surface. (B) The reel is formed of a nonmagnetic material and can be inserted into and removed from the cylindrical portion of the reel. The winding body (C) having a circular cross section that is rotatable in a second direction opposite to the first direction and the first direction (C) is provided along the rotation direction with respect to the winding body, and has an operating position and a non-operating position. The magnetic ball includes a guide groove and a magnetic ball movable in the guide groove. When the magnetic ball rotates in the first direction, the magnetic ball protrudes from the surface of the reel body at the operating position of the guide groove and the friction of the reel. A ball clutch mechanism (D) for connecting / disconnecting between the reel body and the reel by being retractable to the non-actuated position side of the guide groove when the reel body is displaced in the second direction. ) When the ball clutch mechanism is activated or not activated Magnet that holds the magnetic ball in place in the guide groove at least at one of the times

  In this winding device, when the winding shaft main body rotates in the first direction, the magnetic ball moves to the operating position of the guide groove, protrudes from the outer peripheral surface of the winding shaft main body, and contacts the friction surface of the reel. The winding body is connected to the reel through the. Thereby, the rotation of the winding shaft main body is transmitted to the reel, and the reel rotates together with the winding shaft main body so that the sheet material is wound on the reel. When the rotation of the reel unit stops, the magnetic ball can be retracted to the non-operating position side of the guide groove, and the amount of protrusion from the outer peripheral surface of the reel unit becomes small and away from the friction surface of the reel. Is disconnected. After that, when the reel body is rotated in the second direction, the reel body can be removed from the reel.

  Here, in this winding device, the position of the magnetic ball is controlled with a certain strength by the attractive force of the magnet.

  For example, when a magnet is provided near the inoperative position of the guide groove, when the ball clutch mechanism is inoperative, i.e. when the magnetic ball is not in contact with the friction surface of the reel, or when the magnetic ball is in the operating position of the guide groove. When the centrifugal force to be moved is not working, the magnetic ball is attracted to the magnet and held in the inoperative position. Therefore, the magnetic ball does not move when the reel is inserted into and removed from the reel body, which makes it easier to insert and remove the reel and suppresses noise and damage to the guide groove.

  On the other hand, when the magnet is provided in the vicinity of the operation position of the guide groove, when the ball clutch is operated, that is, when the winding shaft body is rotating in the first direction, the frictional force of the reel and the magnetic force of the magnet The magnetic ball is held at the operating position of the guide groove. Therefore, the protrusion amount of the magnetic ball is maintained at the maximum, and the reel body is firmly connected to the reel even when a reel having a large inner diameter is used.

  Further, the electrode manufacturing apparatus of the present invention includes a feeding unit that feeds a sheet-like wide electrode from an unwinding roll, a cutting unit that cuts the wide electrode into a plurality of narrow electrodes along the feeding direction, and a plurality of strips. And a winding unit that individually winds the narrow electrode, and the winding unit is constituted by the winding device of the present invention.

  In this electrode manufacturing apparatus, the sheet-like wide electrode is fed out from the unwinding roll in the feeding section, and the wide electrode is cut into a plurality of narrow electrodes along the feeding direction in the cutting section. After that, a plurality of narrow electrodes are individually wound in the winding portion.

  According to the winding device of the present invention or the electrode manufacturing device of the present invention, the magnetic ball is held at a predetermined position in the guide groove by the magnet when the ball clutch mechanism is operated or not. Therefore, the position of the magnetic ball can be reliably controlled.

  In other words, when the ball clutch mechanism is not operated, the magnetic ball is held at the non-operating position of the guide groove by the magnet, so that the reel can be easily inserted and removed, and noise and damage to the guide groove can be suppressed. Become. On the other hand, if the magnetic ball can be held at the guide groove operating position when the ball clutch mechanism is operated, a reel having a large inner diameter can be connected, and the reel inner diameter is reduced by the pressure of the wound sheet material. The reel can be easily removed from the reel body even if it is.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 10 shows an example of a secondary battery manufactured using the electrode manufacturing apparatus according to the first embodiment of the present invention. The secondary battery 10 is a so-called cylindrical type, and has a wound body 20 inside a substantially cylindrical battery can 11. The battery can 11 is made of, for example, iron (Fe) plated with nickel (Ni), and has one end closed and the other end open. Inside the battery can 11, a pair of insulating plates 12 and 13 are arranged perpendicular to the winding peripheral surface so as to sandwich the wound body 20.

  At the open end of the battery can 11, a battery lid 14, a safety valve mechanism 15 provided inside the battery lid 14 and a heat sensitive resistance element (Positive Temperature Coefficient; PTC element) 16 are interposed via a gasket 17. It is attached by caulking, and the inside of the battery can 11 is sealed. The battery lid 14 is made of, for example, the same material as the battery can 11. The safety valve mechanism 15 is electrically connected to the battery lid 14 via the heat sensitive resistance element 16, and the disk plate 15A is reversed when the internal pressure of the battery exceeds a certain level due to an internal short circuit or external heating. Thus, the electrical connection between the battery lid 14 and the wound body 20 is cut off. When the temperature rises, the heat sensitive resistance element 16 limits the current by increasing the resistance value and prevents abnormal heat generation due to a large current. The gasket 17 is made of, for example, an insulating material, and asphalt is applied to the surface.

  The wound body 20 is formed by laminating a positive electrode 21 and a negative electrode 22 with a separator 23 interposed therebetween, and a center pin 24 made of stainless steel or the like is inserted in the center. The positive electrode 21 is a positive electrode current collector layer made of, for example, aluminum foil, and an electrode layer containing a positive electrode active material such as a lithium-containing compound, and the negative electrode 22 is made of, for example, a negative electrode collector made of copper foil or the like. The electrode layer is provided with an electrode layer containing a negative electrode active material such as a carbon material capable of inserting and extracting lithium. The separator 23 is made of, for example, a porous film such as polypropylene, and the separator is impregnated with an electrolytic solution in which an electrolyte salt such as a lithium salt is dissolved in a non-aqueous solvent such as carbonate. Yes. A positive electrode lead 25 made of aluminum (Al) or the like is connected to the positive electrode 21 of the wound body 20, and a negative electrode lead 26 made of nickel or the like is connected to the negative electrode 22. The positive electrode lead 25 is electrically connected to the battery lid 14 by being welded to the safety valve mechanism 15, and the negative electrode lead 26 is welded to and electrically connected to the battery can 11.

  FIG. 1 shows the overall configuration of an electrode cutting device used in the manufacturing process of such a secondary battery 10. This electrode cutting device is for cutting the wide electrode 100 to be the positive electrode 21 or the negative electrode 22 into a plurality of strip electrodes 100A (for example, six strips) 100A and winding them individually on a reel in the manufacturing process of the secondary battery 10. For example, the route is divided into three stages of a sending unit 110, a cutting unit 120, and a winding unit 130. In addition, you may provide a guide roll, a support member, etc. which are not shown in these each part.

  The delivery unit 110 is a path for delivering the wide electrode 100 from the unwinding roll 111.

  The cutting part 120 is a path for cutting the wide electrode 100 into, for example, six narrow electrodes 100A by the cutting mechanism 121.

  The winding unit 130 is a path for individually winding the six narrow electrodes 100A onto the reel 210. Three reels 210 are attached to two reel main bodies 220 arranged in two upper and lower stages, and each of the reel main bodies 220 is provided with a motor 230 for rotational driving.

  The reel 210 is made of aluminum, for example. As shown in FIG. 2, the reel 210 has annular flanges 212 at both ends of the cylindrical portion 211. The cylindrical portion 211 has a winding portion 211A for winding the narrow electrode 100A on the outer peripheral surface, and its inner periphery is in contact with a magnetic ball of a ball clutch mechanism, which will be described later, and exerts a frictional force on the magnetic ball. It is a friction surface 211B for working. The width W of the winding unit 211A is set to an appropriate value of 40 mm to 115 mm, for example, in accordance with the number of strips of the narrow electrode 100A.

  FIG. 3 shows the overall configuration of the reel body 220, and FIG. 4 shows its cross-sectional configuration. The winding shaft main body 220 is formed in a circular cross section that can be inserted into and removed from the cylindrical portion 211 of the reel 210. A drive shaft 221 connected to the motor 230 passes through a through hole provided in the center of the reel body 220, and the reel body 220 is in the direction of arrow A1 (second direction) and in the opposite direction of arrow A2. It can rotate in the (first direction). Such a winding shaft body 220 has a structure in which a plurality of (for example, 20) disk-shaped connecting portions 220A made of a nonmagnetic metal such as aluminum or duralumin, an alloy, or ceramic are laminated. Each connecting portion 220A and drive shaft 221 are connected by, for example, a bearing and a ball key (both not shown).

  The winding shaft main body 220 and the reel 210 are connected or disconnected by the ball clutch mechanism 240, that is, connection and release thereof. The ball clutch mechanism 240 is configured such that, for example, a magnetic ball 242 such as a steel ball is movably accommodated in a guide groove 241 provided along the rotation direction with respect to the outer peripheral surface C1 of the winding shaft main body 220. By using such a ball clutch mechanism 240, it is possible to transmit torque from the winding shaft main body 220 to give a necessary winding tension to the narrow electrode 100A of each reel 210. For example, six ball clutch mechanisms 240 are provided at regular intervals for each connecting portion 220A.

  The guide groove 241 has a cross-sectional shape that is formed in accordance with the shape of the magnetic ball 242 as shown in FIG. 5, for example. In order to prevent the magnetic ball 242 from jumping out at the outlet, for example, a screw type The ball stopper 243 is attached. Hereinafter, the deepest position of the guide groove 241 is referred to as a non-operation position P1, and the shallowest position is referred to as an operation position P2.

  In the present embodiment, a magnet 250 is provided in the vicinity of the non-operation position P1 of the guide groove 241. As a result, the winding unit 130 can reliably hold the magnetic ball 242 at the non-operation position P1 when the ball clutch mechanism 240 is inoperative, and can easily remove and insert the winding body 220 into and from the reel 210. It has become.

  As shown in FIG. 6, the magnet 250 is, for example, cylindrical, and is accommodated in a magnet accommodating hole 251A formed in a flat portion of the connecting portion 220A. It is fixed by a fixed plate 251B made of, for example, engineering plastic, which is strong against movement and is a nonmagnetic material.

  In this electrode cutting apparatus, the wide electrode 100 is fed from the unwinding roll 111 in the sending unit 110, and is cut into, for example, six narrow electrodes 100 </ b> A by the cutting mechanism 121 in the cutting unit 120, and then sent to the winding unit 130. It is.

  In the winding unit 130, first, the winding shaft main body 220 is inserted into the cylindrical portion 211 of the reel 210 by being manually or automatically rotated in the direction of the arrow A1. Next, when the reel body 220 is rotated in the direction of arrow A2 by the motor 230, the magnetic ball 242 moves to the operating position P2 of the guide groove 241 as shown in FIG. The winding shaft body 220 is connected to the reel 210 via the magnetic ball 242 while protruding and in contact with the friction surface 211B of the reel 210. Thereby, the rotation of the winding shaft body 220 is transmitted to the reel 210, the reel 210 rotates with the winding shaft body 220, and the narrow electrode 100 </ b> A is wound around the reel 210.

  Subsequently, when the rotation of the winding shaft 220 stops, as shown in FIG. 5, the magnetic ball 242 is retracted to the inoperative position P <b> 1 of the guide groove 241, and the connection between the winding shaft main body 220 and the reel 210 is released. . After that, the reel body 220 is pulled out by manually or automatically rotating in the direction of arrow A1, and the reel 210 is removed from the reel body 220. The narrow electrode 100A (the positive electrode 21 or the negative electrode 22) wound around the reel 210 is stacked and wound with the separator 23 therebetween, and is stored inside the metal can.

  Here, since the magnet 250 is provided in the vicinity of the non-operating position P1 of the guide groove 241, when the ball clutch mechanism 240 is inactive, that is, when the magnetic ball 242 and the reel 210 are not in contact, When the centrifugal force to move 242 to the operating position P2 of the guide groove 241 is not working, the magnetic ball 242 is attracted to the magnet 250 and held at the non-operating position P1. Therefore, when the reel 210 is inserted into and removed from the winding shaft main body 220, the magnetic ball 242 does not move easily, making it easier to insert and remove the reel 210 and suppressing noise and damage to the guide groove 241.

  Subsequently, when it is desired to cut another wide electrode 100 into, for example, ten narrow electrodes 100A and wind it around the reel 210, the same reel main body 220 can be used by changing only the reel 210. In other words, in the case of the above-described 6-threading, six reels 210 are used as shown in FIG. 8, and in the case of 10-threading, the width W is narrowed to match the 10-threading as shown in FIG. The ten reels 210 may be used.

  As described above, in this embodiment, the magnet 250 is provided in the vicinity of the non-operating position P1 of the guide groove 241. Therefore, when the ball clutch mechanism 240 is not operated, the magnetic ball 242 is reliably held at the non-operating position P1. be able to. Therefore, the reel 210 can be easily inserted and removed, and noise and damage to the guide groove 241 can be suppressed.

  Further, even if the width of the reel 210 changes depending on the number of the stripped narrow electrodes 100A, the reel body 220 can be made common, and therefore the reel body 220 is highly versatile and has many different dimensions. It becomes possible to cope with the manufacture of the battery.

[Modification]
In the above embodiment, the case where the winding shaft main body 220 is formed by laminating a plurality of disk-shaped connecting portions 220A has been described. However, as shown in FIG. Alternatively, it may be formed by processing a single piece of a round bar made of a nonmagnetic metal such as duralumin, an alloy, or ceramic. In that case, for example, 20 rows of ball clutches 240 are provided at equal intervals on the outer peripheral surface C <b> 1 of the reel body 220. Further, as shown in FIG. 12, the magnet 250 is housed in a magnet housing hole 251C formed by drilling or the like from the outer peripheral surface C1 of the reel body 220, and is fixed by a lid 251D.

  Hereinafter, other embodiments of the present invention will be described, but the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[Second Embodiment]
FIG. 13 shows a cross-sectional configuration of a reel unit according to the second embodiment of the present invention. The reel body 220 has the same configuration as the reel body described in the first embodiment except that the magnet 250 is provided in the vicinity of the operating position P2 of the guide groove 241. .

  In the present embodiment, the magnet 250 is provided in the vicinity of the operating position P2 of the guide groove 241 as described above. As a result, the winding unit 130 can reliably hold the magnetic ball 242 at the operating position P2 of the guide groove 241 when the ball clutch mechanism 240 is operated, and can connect the reel 210 having a large inner diameter. It has become. Note that the magnetic force of the magnet 250 is desirably set to an extent that does not prevent the magnetic ball 242 from retracting to the inoperative position P1 of the guide groove 241 when the ball clutch mechanism 240 is inoperative.

  In this electrode cutting apparatus, as in the first embodiment, the wide electrode 100 is sent out from the unwinding roll 111 in the delivery unit 110 and is cut into, for example, six narrow electrodes 100A by the cutting mechanism 121 of the cutting unit 120. After that, it is sent to the winding unit 130.

  In the winding unit 130, first, the winding shaft main body 220 is inserted into the cylindrical portion 211 of the reel 210 in the same manner as in the first embodiment. Next, when the reel body 220 is rotated by the motor 230, the magnetic ball 242 moves to the operating position P2 of the guide groove 241 and protrudes from the outer peripheral surface C1 of the reel body 221 and contacts the friction surface 211B of the reel 210. The winding shaft 220 is connected to the reel 210 via the ball 242. Thereby, the rotation of the winding shaft body 220 is transmitted to the reel 210, the reel 210 rotates with the winding shaft body 220, and the narrow electrode 100 </ b> A is wound around the reel 210.

  At this time, since the magnet 250 is provided in the vicinity of the operating position P2 of the guide groove 241, the magnetic ball 242 is reliably held at the operating position P2. Therefore, the protrusion amount of the magnetic ball 242 is maintained at the maximum when the ball clutch mechanism 240 is operated, and the winding shaft body 220 is firmly connected to the reel 210 even when the reel 210 having a large inner diameter is used.

  Subsequently, when the rotation of the reel main body 220 stops, the magnetic ball 242 can be retracted to the non-operation position P1 side of the guide groove 241 and the connection between the reel main body 220 and the reel 210 is released. After that, the winding shaft body 220 is pulled out in the same manner as in the first embodiment, and the reel 210 is removed from the winding shaft body 220. At this time, since the reel 210 having a large inner diameter can be used, the reel 210 can be easily detached from the winding shaft main body 220 even if the inner diameter of the reel 210 is narrowed by the pressure of the wound narrow electrode 100A.

  After that, the narrow electrode 100A (the positive electrode 21 or the negative electrode 22) wound around the reel 210 is stacked and wound with the separator 23 therebetween as in the first embodiment, and is stored inside the metal can. Is done.

  As described above, in this embodiment, the magnet 250 is provided in the vicinity of the operation position P2 of the guide groove 241. Therefore, the magnetic ball 242 can be reliably held at the operation position P2 when the ball clutch mechanism 240 is operated. it can. Therefore, the reel 210 having a large inner diameter can be connected, and the reel 210 can be easily detached from the winding shaft main body 220 even if the inner diameter of the reel is narrowed by the pressure of the wound narrow electrode 100A.

[Third Embodiment]
14 and 15 show a cross-sectional configuration of the reel body according to the third embodiment of the present invention. The winding shaft main body 220 has a double structure of an outer cylinder 220B and an inner cylinder 220C, and the first cylinder described above except that the position of the magnet 250 can be switched by rotating the inner cylinder 220C. It has the same configuration as the reel unit described in the embodiment.

  A guide groove 241 of the ball clutch mechanism 240 is provided in the outer cylinder 220B of the winding shaft main body 220, and a magnet 250 is provided in the inner cylinder 220C. By rotating the inner cylinder 221C manually or automatically, the position of the magnet 250 is between the vicinity of the non-operation position P1 of the guide groove 241 (see FIG. 14) and the vicinity of the operation position P2 (see FIG. 15). Can be switched. Thereby, in this winding part 130, the position of the magnet 250 can be optimally controlled both when the ball clutch mechanism 240 is operated and when it is not operated.

  In this electrode cutting apparatus, as in the first embodiment, the wide electrode 100 is sent out from the unwinding roll 111 in the delivery unit 110 and is cut into, for example, six narrow electrodes 100A by the cutting mechanism 121 of the cutting unit 120. After that, it is sent to the winding unit 130.

  In the winding unit 130, first, the winding shaft main body 220 is inserted into the rotation center of the reel 210 in the same manner as in the first embodiment, and the inner cylinder 220C is automatically or manually moved as shown in FIG. By rotating in the A3 direction, the position of the magnet 250 is switched to the vicinity of the operating position P2 of the guide groove 241. Next, when the reel main body 220 is rotated by the motor 230, the reel main body 220 is connected to the reel 210 via the magnetic ball 242 and the reel 210 rotates together with the reel 220 in the same manner as in the first embodiment. At the same time, the narrow electrode 100A is wound around the reel 210.

  At this time, since the position of the magnet 250 is switched to the vicinity of the operating position P2 of the guide groove 241, the magnetic ball 242 is reliably held at the operating position P2. Therefore, the protrusion amount of the magnetic ball 242 when the ball clutch mechanism 240 is operated is maintained at the maximum, and the reel body 220 is firmly connected to the reel 210 even when the reel 210 having a large inner diameter is used.

  Subsequently, when the rotation of the winding shaft main body 220 stops, as shown in FIG. 14, the position of the magnet 250 is switched to the vicinity of the non-operation position P <b> 1 of the guide groove 241 by rotating the inner cylinder 220 </ b> C automatically or manually. As in the first embodiment, the connection between the winding shaft body 220 and the reel 210 is released. After that, the winding shaft body 220 is pulled out in the same manner as in the first embodiment, and the reel 210 is removed from the winding shaft body 220.

  At this time, since the position of the magnet 250 is switched to the vicinity of the non-operation position P1 of the guide groove 241, the magnetic ball 242 is reliably held at the non-operation position P1. Therefore, when the reel 210 is inserted into and removed from the winding shaft main body 220, the magnetic ball 242 does not move easily, making it easier to insert and remove the reel 210 and suppressing noise and damage to the guide groove 241.

  Further, since the reel 210 having a large inner diameter can be used, the reel 210 can be easily detached from the winding shaft body 220 even if the inner diameter of the reel 210 is narrowed by the pressure of the wound narrow electrode 100A.

  After that, the narrow electrode 100A (the positive electrode 21 or the negative electrode 22) wound around the reel 210 is stacked and wound with the separator 23 therebetween as in the first embodiment, and is stored inside the metal can. Is done.

  As described above, in the present embodiment, the position of the magnet 250 can be switched by rotating the inner cylinder 220C. Therefore, the position of the magnetic ball 242 is optimal both when the ball clutch mechanism 240 is operated and when it is not operated. Can be controlled. Therefore, similarly to the first embodiment, the reel 210 can be easily inserted and removed, and noise and damage to the guide groove 241 can be suppressed. Similarly to the second embodiment, a reel 210 having a large inner diameter can also be connected, and the reel 210 is wound around the reel body 220 even when the inner diameter of the reel 210 is reduced by the pressure of the wound narrow electrode 100A. It can be easily removed from.

[Fourth Embodiment]
FIG. 16 illustrates a cross-sectional configuration of a reel body according to the fourth embodiment of the present invention. As with the first embodiment, the winding shaft body 220 is connected to the reel 210 by the ball clutch mechanism 240, and a magnet 250 is provided in the inside thereof.

  For example, a plurality of (for example, 16) magnets 250 are provided at equal intervals on a circumference C2 centered on the rotation axis of the winding shaft body 220. The number of magnets 250 is not necessarily the same as that of the ball clutch mechanism 240, and a larger number of magnets 250 than the ball clutch mechanism 240 may be arranged on the circumference C2. Moreover, the magnet 250 is provided with N poles and S poles alternately.

  FIG. 16 is for explaining an optimal arrangement relationship between the magnetic balls 242 and the magnets 250. The range in which the magnetic ball 242 can move (hereinafter referred to as “ball arrangement range Rb”) is the first connecting the center of the magnetic ball 242 at the non-actuated position P1 of the guide groove 241 and the rotation center O of the winding body 220. This is a range sandwiched between the line segment L1 and the second line segment L2 connecting the center of the magnetic ball 242 at the operating position P2 and the rotation center O of the winding shaft body 220. On the other hand, the range in which the magnet 250 can retract the magnetic ball 242 (hereinafter referred to as “retraction range Rm”) is adjacent to the magnet center line Lcm that connects the center of the magnet 250 and the rotation center O of the winding body 220. This is a range sandwiched between equal strength magnetic field lines Lemf that are equidistant from the magnet 250. The equal strength magnetic field lines Lemf are lines connecting the intersections of the magnetic field lines Lmf from the respective magnets 250.

  At this time, the ball arrangement range Rb is preferably within the pull-in range Rm (see FIG. 17 (left)). In this way, the magnetic ball 242 is centered in the retraction range Rm at all positions, and when the ball clutch mechanism 240 is not operated, that is, when the magnetic ball 242 and the reel 210 are not in contact with each other and the magnetic ball This is because the magnetic ball 242 can always be attracted to the non-operating position P1 of the guide groove 241 when the centrifugal force to move the 242 to the operating position P2 of the guide groove 241 is not working.

  In particular, it is more preferable that the first line segment L1 coincides with the magnet center line MCL (see FIG. 17 (center)). In this way, the magnetic ball 242 is closest to the magnet 250 when the magnetic ball 242 is in the non-operating position P1 of the guide groove 241, and therefore, the magnetic ball 242 can be most strongly attracted to the non-operating position P1 by the magnet 250. is there.

  On the other hand, when the magnetic ball 242 is out of the pull-in range Rm when the magnetic ball 242 is in the non-operating position P1 of the guide groove 241 (see FIG. 17 (right)), the reel body 220 is stationary and in an unloaded state. However, the magnetic ball 242 protrudes from the outer peripheral surface C1 of the winding shaft main body 220 halfway. Therefore, if the reel 210 is pulled out in this state, the reel 210 hits the magnetic ball 242 and is difficult to pull out, and the guide groove 241 is damaged and spreads, and the magnetic ball 242 may spill out. There is.

  In this electrode cutting apparatus, as in the first embodiment, the wide electrode 100 is sent out from the unwinding roll 111 in the delivery unit 110 and is cut into, for example, six narrow electrodes 100A by the cutting mechanism 121 of the cutting unit 120. After that, it is sent to the winding unit 130.

  In the winding unit 130, first, the winding shaft main body 220 is inserted into the cylindrical portion 211 of the reel 210 in the same manner as in the first embodiment. Next, when the reel body 220 is rotated by the motor 230, the reel body 220 is connected to the reel 210 via the magnetic ball 242 and the reel 210 is rotated together with the reel body 220 in the same manner as in the first embodiment. At the same time, the narrow electrode 100A is wound around the reel 210.

  Subsequently, when the rotation of the winding shaft main body 220 stops, the connection between the winding shaft main body 220 and the reel 210 is released in the same manner as in the first embodiment. After that, the winding shaft body 220 is pulled out in the same manner as in the first embodiment, and the reel 210 is removed from the winding shaft body 220.

  Here, since the ball arrangement range Rb is within the retraction range Rm, the magnetic ball 242 is always attracted to the non-operation position P1 of the guide groove 241 when the ball clutch mechanism 240 is not operated. Therefore, when the reel 210 is inserted into and removed from the reel body 220, the magnetic ball 242 does not move easily, and the reel 210 can be easily inserted and removed, and noise and damage to the guide groove 241 can be suppressed.

  In particular, if the first line segment L1 coincides with the magnet center line MCL, the magnetic ball 242 is closest to the magnet 250 when the magnetic ball 242 is at the non-operating position P1 of the guide groove 241, and the magnetic ball 242 is It is strongly pulled to the non-operation position P1.

  As described above, in the present embodiment, the ball arrangement range Rb is within the pull-in range Rm, so that the position of the magnetic ball 242 is controlled when the ball clutch mechanism 240 is not operated, so that the reel 210 can be easily inserted and removed. Noise and damage to the guide groove 241 can be suppressed.

  In particular, the position of the magnetic ball 242 can be more reliably controlled by making the first line segment L1 coincide with the magnet center line MCL.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the fourth embodiment, the case where the N pole and the S pole are alternately provided on the magnet 250 has been described, but the magnet 250 is similarly applied to the first to third embodiments. In addition, the N pole and the S pole may be provided alternately.

  In addition, when the N pole and the S pole are alternately provided in the magnet 250, it is possible to generate an eddy current during rotation to provide a function as an eddy current clutch.

  Further, in the above embodiment, the case where the secondary battery 10 is manufactured by the winding device of the present invention has been described. However, the present invention is not necessarily limited thereto, and the primary battery having the same structure as the secondary battery 10 is described. It is also possible to manufacture.

  The winding device of the present invention is not limited to the cylindrical battery electrode described above, and can be widely used when winding a belt-like sheet material made of other materials such as paper, cloth, synthetic resin, and metal foil. . Further, the present invention can be applied to a yarn winding device section of a spinning machine having a bobbin.

It is a figure showing the whole electrode cutting device composition concerning a 1st embodiment. It is sectional drawing showing the structure of the reel shown in FIG. It is a front view showing the whole structure of the winding-axis main body shown in FIG. It is sectional drawing showing the internal structure of the winding axis | shaft main body shown in FIG. It is sectional drawing showing the shape of the guide groove shown in FIG. It is a disassembled perspective view showing the structure of the connection part shown in FIG. It is sectional drawing showing operation | movement of the winding axis | shaft main body shown in FIG. It is a figure showing the reel arrangement | positioning in the case of 6 lines. It is a figure showing the reel arrangement | positioning in the case of 10 striping. It is sectional drawing showing an example of the secondary battery manufactured using the electrode manufacturing apparatus shown in FIG. It is a front view showing the modification of the winding shaft main body shown in FIG. It is sectional drawing showing the internal structure of the winding axis | shaft main body shown in FIG. It is sectional drawing showing the structure of the winding shaft main body which concerns on 2nd Embodiment. It is sectional drawing showing the structure of the winding shaft main body which concerns on 3rd Embodiment. It is sectional drawing showing the state which switched the position of the magnet. It is sectional drawing showing the structure of the winding shaft main body which concerns on 4th Embodiment. It is a figure for demonstrating the optimal arrangement | positioning relationship between a magnetic ball and a magnet in the winding axis | shaft main body shown in FIG. It is a front view showing an example of the conventional winding apparatus. It is sectional drawing showing an example of the conventional winding shaft main body.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Secondary battery, 20 ... Rolled body, 21 ... Positive electrode, 22 ... Negative electrode, 23 ... Separator, 24 ... Center pin, 25 ... Positive electrode lead, 26 ... Negative electrode lead, 100 ... Wide electrode, 100A ... Narrow electrode, DESCRIPTION OF SYMBOLS 110 ... Sending part, 111 ... Unwinding roll, 120 ... Cutting part, 121 ... Cutting mechanism, 130 ... Winding part, 210 ... Reel, 211 ... Cylindrical part, 212 ... Flange, 220 ... Winding shaft main body, 221 ... Drive shaft , 220A ... connecting portion, 220B ... outer cylinder, 220C ... inner cylinder, 230 ... motor, 240 ... ball clutch mechanism, 241 ... guide groove, 242 ... magnetic ball, 243 ... ball stopper, 250 ... magnet, 251A ... magnet housing hole 251B: Fixed platen, 251C: Magnet housing hole, 251D: Cover, C1: Outer peripheral surface, P1: Non-operating position, P2: Operating position

Claims (9)

A reel having a winding portion of the sheet material on the outer peripheral surface and a cylindrical portion whose inner periphery is a friction surface;
A winding body having a circular cross section that is formed of a non-magnetic material and can be inserted into and removed from the cylindrical portion of the reel, and is rotatable in a second direction opposite to the first direction and the first direction;
A guide groove provided along the direction of rotation of the reel body and having an operating position and a non-actuated position; and a magnetic ball movable in the guide groove, wherein the magnetic ball is the reel body When rotating in the first direction, the guide groove protrudes from the surface of the reel main body at the operating position of the guide groove, contacts the friction surface of the reel, and when the reel main body is displaced in the second direction, A ball clutch mechanism for performing a connection between the reel body and the reel by being retractable to a non-operation position side;
A winding device comprising: a magnet that holds the magnetic ball at a predetermined position in the guide groove when at least one of the ball clutch mechanism is in operation and non-operation. The winding device according to claim 1, wherein the magnet is provided in the vicinity of a non-operation position of the guide groove. The winding device according to claim 1, wherein the magnet is provided in the vicinity of the operating position of the guide groove. The winding shaft main body has an outer cylinder provided with the guide groove and an inner cylinder provided with the magnet, and the position of the magnet is inactivated in the guide groove by rotating the inner cylinder. The winding device according to claim 1, wherein the winding device can be switched between the vicinity of the position and the vicinity of the operating position. The winding device according to claim 1, wherein a plurality of the magnets are provided at equal intervals on a circumference centered on the rotation axis of the winding shaft body. The winding device according to claim 1, wherein the plurality of magnets are provided so that N poles and S poles are alternately arranged. A first line segment connecting the center of the magnetic ball and the center of the winding shaft at the non-operating position of the guide groove, and a second line segment connecting the center of the magnetic ball and the center of rotation of the winding shaft at the operating position. The ball arrangement range sandwiched between the magnet center line and the magnet center line connecting the rotation center of the winding shaft and the pull-in range sandwiched between equal strength magnetic field lines that are equidistant from the adjacent magnets. The winding device according to claim 1. The winding device according to claim 7, wherein the first line segment coincides with the magnet center line. A feeding part that feeds out the sheet-like wide electrode from the unwinding roll, a cutting part that cuts the wide electrode into a plurality of narrow electrodes along the feeding direction, and the plurality of narrow electrodes are individually wound up An electrode manufacturing apparatus including a winding unit,
The winding unit is
A reel having a winding portion of the narrow electrode on the outer peripheral surface and a cylindrical portion whose inner periphery is a friction surface;
A winding body having a circular cross section that is formed of a non-magnetic material and can be inserted into and removed from the cylindrical portion of the reel, and is rotatable in a second direction opposite to the first direction and the first direction;
A guide groove provided along the direction of rotation of the reel body and having an operating position and a non-actuated position; and a magnetic ball movable in the guide groove, wherein the magnetic ball is the reel body When rotating in the first direction, the guide groove protrudes from the surface of the reel main body at the operating position of the guide groove, contacts the friction surface of the reel, and when the reel main body is displaced in the second direction, A ball clutch mechanism for performing a connection between the reel body and the reel by being retractable to a non-operation position side;
An electrode manufacturing apparatus comprising: a magnet that holds the magnetic ball at a predetermined position in the guide groove when the ball clutch mechanism is activated or not.

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