JP5274089B2 - Asymmetrical core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an asymmetrical core easily pulling out a belt-like object wound in a roll, without applying excessive frictional force to the belt-like object. <P>SOLUTION: The asymmetrical core 4 has a joint shaft 7 joined to a rotational shaft 1 of a winding device, and an advancing/retreating shaft 8 attached to the rotational shaft 1 to be capable of advancing/retreating. When the rotational shaft 1 is retreated in the arrow R direction, a tip 3 of the asymmetrical core 4 is separated from a receiving member 5 and enters into an outer tube 6. One gripping surface formed to the joint shaft 7 and the other gripping surface formed to the advancing/retreating shaft 8 face each other to be capable of advancing/retreating, and are tilted with respect to the axial direction of the rotational shaft 1. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an asymmetrical core for winding a strip such as a metal foil or a separator used as a material for a capacitor or a battery.

  FIG. 5 shows the core 40 having a notch (slit) 110 and the needle 51 of the receiving member 50 facing the tip 30 of the core 40. The winding core 40 is attached at its rear part 20 to a rotating shaft not shown in the drawing of the winding device 100, and advances and retreats in the directions of arrows F and R together with this rotating shaft. In order for the winding device 100 to wind the strip 16, first, the winding core 40 is advanced toward the receiving member 50, and the strip 16 is made to enter the cut portion 110 of the winding core 40. When the needle 51 is inserted into the tip 30 of the core 40, the winding device 100 stops the advancement of the core 40 and rotates the core 40 together with the rotating shaft. As a result, the strip 16 is wound around the core 40 and wound around the core 40 in a roll shape.

When the diameter of the roll-shaped strip 16 reaches a desired size, the winding device 100 cuts the middle of the strip 16 in the longitudinal direction with a cutter or the like to prevent the strip 16 from being unwound from the core 40. For this purpose, an adhesive tape or the like is attached to the peripheral surface of the roll-shaped strip 16 by a sealing device. Subsequently, the winding device 100 retracts the rotating shaft from the member 50. As a result, the core 40 is immersed in the outer cylinder 60 of the winding device 100, but the roll-shaped strip 16 abuts against the end surface of the outer cylinder 60 of the winding device 100 and relatively moves to the tip 30 of the core 40. Since it is pushed out, it falls out of the core 40. Below the outer cylinder 60, a chute or the like for guiding the roll-shaped strip 16 to the next process is installed. In addition, techniques relating to the winding core are disclosed in the following patent documents.
JP 2006-290615 A

  In the process in which the strip 16 is wound around the core 40, an appropriate tension is applied to the strip 16, so that the strip 16 is wound as the strip 16 is wound around the core 40. The force for tightening the core 40 increases. The frictional force that the belt 16 receives from the core 40 due to this force also increases, which causes a problem that it becomes difficult for the roll-shaped strip 16 to come out of the core 40. Therefore, if the core 40 is divided into two shaft bodies 41 and 42 by the cut portion 110 and one of the shaft bodies 41 is retracted before the shaft body 42, the above problem can be alleviated. . However, it is inevitable that the strip 16 is rubbed strongly against the shaft body 41 in the process of retreating the shaft body 41.

  Then, an object of this invention is to provide the asymmetrical core which can extract easily the strip | belt shape wound by roll shape, without applying extra frictional force to a strip | belt shape object.

  An asymmetrical winding core according to the present invention has a base end connected to a rotating shaft of a winding device and projects a tip in the axial direction of the rotating shaft, and has a notch portion extending from the tip to the base end. And formed between two clamping surfaces which are inclined with respect to the axial direction of the rotating shaft and face each other so as to be able to advance and retract in the axial direction.

  Furthermore, the asymmetrical winding core according to the present invention includes a joining shaft that is joined to the rotating shaft and formed with one of the two sandwiching surfaces, and is attached to the rotating shaft so as to freely advance and retract. And an advancing / retracting shaft formed with the other clamping surface of the clamping surfaces, and the cutting portion opens and closes when the advancing / retreating shaft advances / retreats in the axial direction.

  Furthermore, the asymmetrical winding core according to the present invention is characterized in that the joining shaft and the advancing and retracting shaft have respective leading ends, and these leading ends are divided at a ratio of 6 to 4 with the cut portion therebetween. To do.

  The asymmetrical winding core according to the present invention can have the base end joined to the rotating shaft of the winding device, and allow the band-like object to enter the cut portion extending from the front end toward the base end. In this state, the belt-like object is sandwiched between two sandwiching surfaces that are inclined with respect to the axial direction of the rotating shaft and face each other, so that the asymmetrical core rotates along with the rotating shaft of the winding device. A thing can be wound up and a strip can be wound in the shape of a roll around a joint axis and advancing and retreating axis.

  Further, according to the asymmetrical winding core according to the present invention, the joining shaft formed with one clamping surface is joined to the rotating shaft, and the advancing / retracting shaft formed with the other clamping surface is attached to the rotating shaft so as to freely advance and retract. Therefore, it is possible to freely open and close the notch by simply moving the advance / retreat axis back and forth in the axial direction of the rotation axis. Further, since the two clamping surfaces are inclined with respect to the axial direction, a gap is immediately formed between the two when the advance / retreat axis is retracted from the joining axis. As a result, the band wound in a roll shape can escape the force of tightening the joining shaft and the advancing / retracting shaft, so that an excessive frictional force is not applied to the roll band in the process of retreating the advancing / retracting member. A roll-shaped strip can be easily extracted from the asymmetric core.

  Furthermore, according to the asymmetrical winding core according to the present invention, the tip ends of the joining shaft and the advancing / retreating shaft are divided at a ratio of 6 to 4 with the cut portion therebetween, so that the asymmetrical winding core is rotated by the winding device. There is an advantage that it is not necessary to greatly decenter the position of the band-like object entering the cut portion with respect to the center rotating with the shaft. In addition, since the physical strengths of the joining axis and the advancing and retracting axis can be made substantially equal, the overall strength of the asymmetrical core can be improved to the maximum.

  Embodiments of the asymmetric core according to the present invention will be described below. The same designations are used for elements already described as conventional technology, and illustration or description thereof is omitted. FIG. 1A shows an asymmetrical winding core 4 having a proximal end 2 connected to a rotating shaft 1 of a winding device and having a distal end 3 protruding in the axial direction of the rotating shaft 1 indicated by arrows F and R. FIG. When the winding device retracts the rotary shaft 1, the tip 3 of the asymmetrical core 4 is detached from the receiving member 5 and is immersed in the outer cylinder 6 as shown in FIG. The asymmetrical winding core 4 includes a joining shaft 7 joined to the rotating shaft 1 and an advancing / retracting shaft 8 attached to the rotating shaft 1 so as to freely advance and retract.

  As shown in FIG. 2, one clamping surface 9 formed on the joining shaft 7 and the other clamping surface 10 formed on the advancing / retreating shaft 8 face each other, and each 0.1 mm in the axial direction. It is inclined at an angle of 5 ° to 5 °. A notch portion 11 extending from the distal end 3 toward the proximal end 2 is formed between the two clamping surfaces 9 and 10. The total length of the joining shaft 7 and the advancing / retracting shaft 8 only needs to be longer than the width of the belt-like object, and the angle can be appropriately changed in consideration of the diameter of the asymmetrical core 4 or the width of the belt-like object. Moreover, as a material of the joining shaft 7 and the advance / retreat shaft 8, a metal or a synthetic resin can be applied.

  The rotary shaft 1 is obtained by inserting a forward / backward rod 12 joined to the forward / backward shaft 8 into the sleeve 13. The sleeve 13 rotates together with the advance / retreat rod 12 by a drive source such as a motor. The joining shaft 7 is fixed to the sleeve 13 with a bolt or the like. The advance / retreat rod 12 moves the advance / retreat shaft 8 in the axial direction with respect to the joint shaft 7 based on the operation of a piston rod such as an air cylinder. The advance / retreat rod 12 and the sleeve 13 may be engaged via a spline or a slide key.

  As shown in FIGS. 3 (a) and 3 (b), the tip 3 of the asymmetrical core 4 coincides with the tips 14 and 15 of the joining shaft 7 and the advance / retreat shaft 8. The joint shaft 7 is formed with a concave portion 17 into which a belt-like object is fitted. The recess 17 may be formed on either the joining shaft 7 or the advance / retreat shaft 8. T1 and t2 in the figure represent dimensions by which the asymmetrical core 4 is divided with the cut portion 11 therebetween. This ratio corresponds to the thickness of the tip 14 of the joining shaft 7 and the thickness of the tip 15 of the advance / retreat shaft 8 and is preferably set so that the dimension t1 to t2 is 6 to 4. Further, the concave portion of the joint shaft 7 may be omitted as shown in FIG. 10C, and the joint shaft 7 and the advance / retreat shaft 8 are formed by the cut portion 11 as shown in FIGS. The two sandwiching surfaces 9 and 10 may be uneven so that they mesh with each other.

  Next, winding of the strip using the asymmetric core 4 will be described. When the rotary shaft 1 moves backward as shown in FIG. 1B, the advance / retreat shaft 8 of the asymmetrical core 4 moves backward according to the advance / retreat rod 12 shown in FIG. 2 of the winding device. Thereby, since the other clamping surface 10 leaves | separates from one clamping surface 9, the notch | incision part 11 is opened. As shown in FIG. 2A, when the winding device advances the rotary shaft 1 and the strip 16 enters the cut portion 11, the advancing / retracting shaft 8 of the asymmetrical core 4 is moved forward / backward rod 12 of the winding device. Follow along. Thereby, the strip | belt-shaped object 16 is pinched | interposed between the two clamping surfaces 9 and 10 in the state fitted in the recessed part 17 shown in FIG.

  Subsequently, as the asymmetric core 4 rotates with the rotary shaft 1, the strip 16 is wound around the asymmetric core 4, and the strip 16 is wound around the asymmetric core 4 in a roll shape. After the diameter of the roll-shaped strip 16 reaches a desired size, the winding device retracts the rotary shaft 1 from the member 5. In this process, the advancing / retracting shaft 8 of the asymmetrical winding core 4 retreats again to open the cut portion 11, so that the strip 16 is opened from between the two clamping surfaces 9, 10 as shown in FIG. Is done. Further, when the rotary shaft 1 is retracted, the roll-shaped strip 16 hits the end surface of the outer winding cylinder 6 and falls off from the asymmetric core 4.

  The arrow P indicates the direction of the force with which the roll-shaped strip 16 tightens the asymmetric core 4. Since the two clamping surfaces 9 and 10 are inclined with respect to the axial direction, a gap is immediately formed between the two clamping surfaces 9 and 10 when the advancing / retracting shaft 8 retreats as described above. This gap provides room for the joint shaft 7 and the advance / retreat shaft 8 to be elastically deformed in the direction of the arrow P, and the roll-like strip 16 can release the force of tightening the asymmetric core 4, so No excessive frictional force is applied to the strip-shaped strip 16, and the roll-shaped strip 16 can be easily extracted from the asymmetrical core 4.

  Furthermore, according to the asymmetrical core 4, the joining shaft 7 and the advancing / retracting shaft 8 are divided at their tip portions 14 and 15 at a ratio of 6: 4, so that the asymmetrical core 4 rotates with the rotary shaft 1. On the other hand, there is an advantage that the position of the band-like object 16 entering the cut portion 11 does not have to be greatly decentered. Moreover, since the physical strengths of the joining shaft 7 and the advance / retreat shaft 8 can be made substantially equal, the overall strength of the asymmetric core 4 can be improved to the maximum.

  It should be noted that the present invention can be implemented in various improvements, modifications, or variations based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Further, any of these forms belongs to the scope of the present invention. For example, the advance / retreat shaft 8 may be moved back and forth relatively. The advance / retreat shaft 8 may be fixed to the rotating shaft 1 and the joint shaft 7 may be moved back and forth with respect to the rotating shaft 1. You may set the dimension t1 to t2 in the range of about 9 to 1 to 4 to 6.

  The present invention is not limited to battery element materials or capacitor parts, and is a technique useful for winding a strip of any material.

(A) is sectional drawing of the principal part of the winding apparatus which shows one usage example of the asymmetrical winding core which concerns on embodiment of this invention, (b) is sectional drawing of the principal part of the winding apparatus which shows another usage example. . The perspective sectional view showing the example which provided the asymmetrical core concerning the embodiment of the present invention in the rotating shaft of the winding device. (A) is the front view of the front-end | tip of the asymmetrical winding core which concerns on embodiment of this invention, (b) is the side view of the principal part, (c) is the side view of the principal part of the modification, (d), ( e) The front view which shows the further modification, respectively. The side view explaining operation | movement of the asymmetrical core which concerns on embodiment of this invention. Sectional drawing which shows the principal part of the winding core of a prior art example, and a winding apparatus.

Explanation of symbols

1: Rotating shaft 2: Base end 3: Front end 4: Asymmetrical core 7: Joining shaft 8: Advance / retreat shaft 9, 10: Clamping surface 11: Cut portion 14, 15: Tip

Claims (2)

A winding core having a proximal end connected to the rotating shaft of the winding device and having a distal end protruding in the axial direction of the rotating shaft, and a notch portion extending from the distal end toward the proximal end in the axial direction of the rotating shaft Formed between two sandwiching surfaces that are inclined with respect to each other and face each other so as to be movable forward and backward in the axial direction ;
A joining shaft joined to the rotating shaft and formed with one of the two sandwiching surfaces, and the other sandwiching surface of the two sandwiching surfaces attached to the rotating shaft so as to be movable forward and backward. A recessed portion into which a belt-like object is fitted to the joint shaft or the advanced / retracted shaft is formed.
When the advance / retreat shaft advances / retreats in the axial direction, the notch portion opens and closes, and when the advance / retreat shaft retracts, a gap is formed between the two clamping surfaces, and the joining shaft and the advance / retreat axis can be elastically deformed by the gap. Asymmetric winding core characterized by The asymmetrical winding core according to claim 1 , wherein the joining shaft and the advancing / retreating shaft have respective leading ends, and the leading ends are divided at a ratio of 6 to 4 with the cut portion interposed therebetween.

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