JP5134302B2 - Sheet winding device - Google Patents

Description

  The present invention relates to a winding device that winds up a sheet-like material such as a synthetic resin film, a foil, and a laminated sheet of battery electrodes.

  The support of the core in the winding device that winds up the sheet-like material is generally used by a mechanical chuck. That is, it is supported by the frictional force between the inner peripheral surface of the core and the ring that is generated by expanding the diameter of the ring or the like to the inner peripheral surface of the core with a roller (roller) or a ball. In Patent Document 1, a support ring that receives drive from a support shaft that is rotationally driven during winding is connected to the support shaft by a flexible joint, and is provided circumferentially on the outer periphery of the support ring when the support ring rotates. A plurality of rollers on the bottom surface of the inclined groove roll to a shallow portion of the inclined groove, whereby the ring inscribed with the roller expands in diameter and comes into contact with the inner peripheral surface of the core. It is described that a core chuck (mechanical chuck) is inserted into the core to fix the core, and the core is gripped only by the core chuck to wind the sheet-like material.

  However, with this method of holding the core, when trying to insert and fix the core chuck to the core, when the core is stationary, the inner surface of the core and the outer periphery of the core chuck The core is inclined with respect to the support shaft due to the gap with the surface, and in order to fix the core, the support shaft rotates and the roller of the core chuck rolls to expand the ring diameter. . That is, the core is not fixed unless a predetermined torque is applied to the core chuck.

  Therefore, due to the inclination of the core, a predetermined torque is applied to the core chuck, and at the beginning of winding until the core is fixed to the core chuck, wrinkles enter the sheet-like material attached to the core. There was a problem that desired quality could not be obtained.

  Further, in order to prevent the tilting of the core when the core is fixed, if the gap between the inner peripheral surface of the core and the outer peripheral surface of the core chuck is attempted to be minimized, the core is detached from the core chuck. At times, there has been a concern that the inner peripheral surface of the core is scraped and made dust by friction caused by contact between the inner peripheral surface of the core and the outer peripheral surface of the core chuck.

  Therefore, in order to solve these problems, the present applicant has a core fixing mechanism that concentrically fixes the core without being inclined with respect to the support shaft when the core is stationary before starting the winding of the sheet-like material. An application for a sheet-like material winding device including a mechanical chuck that transmits the rotational motion of a support shaft to a winding core has already been filed (Patent Document 2).

JP-A-6-40613 Japanese Patent Application No. 2005-346336

  However, according to the winding device for a sheet-like material according to Patent Document 2, although the inclination at the time of fixing to the core holding part is eliminated, the fixing mechanism of the core is the action and elasticity of the piston by compressed air. A slider that reciprocates in the longitudinal direction of the support shaft is provided by the action of the body, the lug slides on the inclined surface of the slider and projects in the radial direction, and the lug presses the inner peripheral surface of the core to thereby Since the structure is fixed to the holding part, the structure of the holding part is complicated (the number of parts is large), and the cost is greatly increased.

  In addition, due to such a complicated configuration, the length in the longitudinal direction of the core holding part becomes very long, so that the moving distance of the core holding part necessary for attaching and detaching the core at the start and end of winding becomes large. However, there is a problem that the installation space of the winding device must be increased, and it cannot be applied to winding a narrow sheet-like material.

  In the present invention, when winding a sheet, the core is fixed to the core holding part without tilting even when the core is stationary, and the core holding part is compact, and the core An object of the present invention is to provide a sheet-like material winding device in which the inner peripheral surface of the core is not scraped when the core is detached from the chuck (mechanical chuck).

The present invention provides a core centering portion for concentrically fixing the core to the support shaft without tilting with respect to the support shaft when the core is stationary before starting winding, and rotational motion of the support shaft to the core. has a core holding portion made of a mechanical chuck unit for transmitting, to the support shaft winding core is fixed to a mechanical chuck portion be rotated characterized in that the winding core centering portion and the core is not rotated Yes.

  The core centering portion is provided with an outer ring via a bearing on the outer peripheral surface side of the support shaft, and the taper surface of the taper portion formed at the core side end of the outer peripheral ring has the core of the core. The inner diameter surface of the end portion is combined, and the taper surface portion of the outer peripheral ring is pushed together with the support shaft toward the end portion of the core, whereby the core is centered along the taper surface.

  Further, the mechanical chuck portion includes a cam ring formed with a cam curve surface including a deep portion and a shallow portion in a circumferential direction of the outer peripheral portion locked to the support shaft, and a roller disposed on the cam curve surface. The chuck ring is mounted so as to be inscribed in the roller, and the roller rolls from the deep part to the shallow part along the cam curve surface by the rotation of the cam ring, and when the roller comes to the shallow part, A rotation driving force is transmitted to the core by expanding the diameter of the chuck ring and press-contacting the inner peripheral surface of the core.

  According to the sheet-like material winding device of the present invention, the core centering portion that concentrically fixes the core without tilting with respect to the support shaft when the core is stationary before starting winding, and the support shaft on the core. Therefore, the sheet-like object is not wrinkled from the beginning of winding of the sheet-like material, and a good winding shape is obtained.

  In addition, since there is no need to worry about the inclination of the core with respect to the support shaft when the core is stationary before starting winding, it is possible to increase the clearance between the inner peripheral surface of the core and the outer peripheral surface of the core holding portion. The inner peripheral surface of the core is not scraped when the core is attached or detached.

  Furthermore, since the winding centering portion is very compact, the winding device can be reduced in cost and can contribute to a reduction in the installation area of the device, so that an economic effect can be expected.

  FIG. 1 is a sectional view of one side in the longitudinal direction of the axial center showing the configuration of a core holding part 1 for holding both ends of a core a in the winding device of the present invention, and FIG. 2 is a cutting line AA in FIG. It is sectional drawing seen from.

  Hereinafter, the configuration of the core holding unit 1 will be described with reference to FIGS. 1 and 2. First, in the winding device, the support shaft 2 is interposed via a bearing 4 fitted on the inner peripheral surface side of the bearing case 3. Are attached to the bearing case 3. The bearing 4 is fixed to the support shaft 2 with a retaining ring 5.

  A drive motor (not shown) is connected to the end of the support shaft 2 on the side opposite to the winding core a via a coupling (not shown), and the drive motor is provided integrally with the bearing case 3. ing. A bracket 6 that holds the bearing 4 is attached to the end surface of the bearing case 3 on the core a side so as to be integrated with the bearing case 3 with a bolt 7.

  A rod 9 of an air cylinder 8 is fixed to the end side of the bracket 6, and the air cylinder 8 is attached to a machine frame (not shown). The bearing case 3 is pushed out or retracted simultaneously with the support shaft 2 by the expansion and contraction of the rod 9.

  Next, the core holding part 1 transmits the rotational driving force of the support shaft 2 to the core a when the core a is stationary, and the core centering part 10 for centering and fixing the core a when the core a is stationary. It consists of a mechanical chuck portion 11 that performs.

  The core centering portion 10 includes an outer peripheral ring 12 that is provided so as to be rotatable relative to the support shaft 2 via a bearing 19 that is fitted to the outer peripheral surface of the support shaft 2 on the core a side. The bearing 19 is fixed to the inner peripheral surface of the outer ring 12 with a retaining ring 13.

  On the end surface of the outer peripheral ring on the side of the core a, a tapered surface 12a having a diameter larger than the inner diameter of the core a as a starting point K and having a smaller diameter toward the core is formed. Then, the outer peripheral ring 12 moves toward the core a by the extrusion of the support shaft 2 described above, and after the inner peripheral portion of the core a comes into contact with the tapered surface 12a of the outer peripheral ring 12, the core a The inner peripheral portion is centered along the tapered surface 12a, and the core a is fixed to the outer peripheral ring 12 concentrically with the support shaft 2 by the pressure of the air cylinder 8.

  On the other hand, the mechanical chuck portion 11 includes a cam ring 14 that is inserted into the support shaft 2 via a key 20 on the outer peripheral surface of the core a side of the support shaft 2, a roller 15 that is disposed on the outer peripheral surface of the cam ring 14, The chuck ring 16 is mounted so as to be inscribed in the roller 15. A lid 17 is attached to the end surface of the support shaft 2 with bolts 18 to prevent the cam ring 14, the roller 15 and the chuck ring 16 from falling off.

  In the circumferential direction of the outer peripheral surface of the cam ring 14, a plurality of cam curve surfaces 14a each having a deep portion and a shallow portion are formed at equal intervals, and one roller 15 is disposed on each cam curve surface 14a. Is done.

  When the winding core is stationary, the roller 15 is disposed at the deep portion of the cam curve surface 14a of the cam ring 14, and the cam ring 14 is rotated simultaneously with the rotation of the support shaft 2, so that the roller 15 is shallowed from the deep portion along the cam curve surface. By rolling to the part, the chuck ring 16 inscribed in the roller 15 is expanded in diameter and presses the inner peripheral surface of the core a. Thereby, the rotational driving force from the support shaft 2 is transmitted to the core a. The chuck ring 16 is preferably provided with a cut 16a at one location on the circumference so that the diameter can be easily increased.

  The outer peripheral ring 12 of the core centering portion 10 is provided with a cylindrical portion 12b that covers the cam curved surface 14a of the cam ring 14, and each cylindrical roller 12b has a roller 15 that does not move on the cam curved surface 14a. There is provided a notch 12c that sandwiches and regulates 15 so that it can roll.

  As described above, the core centering portion 10 and the mechanical chuck portion 11 are incorporated into the support shaft 2 to form the core holding portion 1. The core holding portion 1 holds the core a from both inner surface portions. .

  Next, the operation of the core holding unit 1 in the sheet winding device of the present invention will be described. In attaching the core a to the core holding portion 1, first, the roller 15 of the mechanical chuck portion 11 is disposed in the deep portion of the cam curve surface 14 a formed on the cam ring 14, and the chuck ring 16 inscribed in the roller 15 is inscribed. The outer peripheral surface of the core is set so as to be inside the inner peripheral surface of the core a in a reduced diameter state.

  The extension of the rod 9 by the piston 8 causes the core holding part 1 to enter the inner peripheral portions of both ends of the core a in a stationary state. Then, after the inner peripheral portion of the end of the core a comes into contact with the tapered surface 12a formed on the outer peripheral ring 12 of the core centering portion 10, the inner peripheral portion of the core a is centered along the tapered surface 12a. The core a is fixed concentrically with the support shaft 2 to the outer ring 12 of the core centering portion 10 by the pressure of the rod 9 by the air cylinder 8.

  Next, after attaching a sheet-like material to the core a, the support shaft 2 is driven. Here, in the core centering part 10, since the core a and the said sheet-like object are connected, the core a does not rotate, and since the outer peripheral ring 12 is also fixed to the core a, it does not rotate.

  In this state, when the support shaft 2 rotates slightly, the roller 15 in the mechanical chuck portion 11 rolls the cam curve surface 14a of the cam ring 14 from the deep portion to the shallow portion, and the chuck ring 16 expands in diameter. Then, the outer peripheral surface of the chuck ring 16 whose diameter has been expanded presses the inner peripheral surface of the core a, whereby the core a is fixed to the mechanical chuck portion 11 and the drive of the support shaft 2 is stopped. The drive of the support shaft 2 at this time is performed by controlling the torque of a motor connected to the support shaft 2.

  Thereafter, the winding core a is rotationally driven and winding of the sheet-like material is started.

  As described above, the core a is fixed to the core centering portion 10 concentrically with the support shaft 2 without being tilted when stationary, and the core a is transmitted to the mechanical chuck portion 11 from the support shaft 2. Therefore, a good winding shape can be obtained without wrinkles entering the sheet-like material from the beginning of winding of the sheet-like material.

It is sectional drawing of the axial center longitudinal direction which shows the structure of the core holding | maintenance part in this invention. It is sectional drawing seen from the cutting line AA in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core holding part 2 Support shaft 10 Core centering part 11 Mechanical chuck part 12 Outer ring 12a Tapered surface 12b Cylindrical part 12c Notch 14 Cam ring 15 Roller 16 Chuck ring

Claims (3)

In a winding device that winds up the sheet-like material by supporting both ends of the winding core of the sheet-like material on a support shaft, the winding core is inclined with respect to the support shaft when the winding core is stationary before the winding starts. mechanical also have a core holding portion made of a mechanical chuck unit for transmitting the rotational driving force of the support shaft to the winding core and core centering portion which concentrically fixed to the support shaft, the support shaft rotates without A sheet winding device, wherein the core centering portion and the core do not rotate until the core is fixed to the chuck portion . The core centering portion is provided with an outer ring via a bearing on the outer peripheral surface side of the supporting shaft, and the taper surface of the taper portion formed at the core side end of the outer peripheral ring has the core of the core. The center of the winding core is centered along the tapered surface by combining the inner circumferential surface of the end and pushing the tapered surface portion of the outer circumferential ring together with the support shaft toward the end of the winding core. The sheet-like product take-up device. A cam ring having a cam curve surface formed of a deep portion and a shallow portion in a circumferential direction of the outer periphery of the mechanical chuck portion, which is locked to the support shaft; and a roller disposed on the cam curve surface; The chuck ring is mounted so as to be inscribed in the roller, and the roller rolls from the deep part to the shallow part along the cam curve surface by the rotation of the cam ring. The sheet-like material winding device according to claim 1, wherein the ring expands in diameter and presses the inner peripheral surface of the core to transmit a rotational driving force to the core.

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