JP2006315836A - Friction winding shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction winding shaft, for properly holding a plurality of short cores, and making narrow band-like sheets wound around each core all together to prevent defect of the sheets. <P>SOLUTION: The friction winding shaft comprises: a tubular main body 4 penetrating and supporting a core group 3 which is constituted of a plurality of tubular cores 1 for winding the band-like sheets S, and tubular spacers 2 disposed between the cores 1; a core holding pipe 6 constituted of a core group tightening mechanism 5 tightening the core group 3, which is penetrated and supported by the main body 4, from the both sides; a rotary drive shaft 7 rotary-driven by a rotary-drive mechanism; a plurality of winding collars 8 each of which has an outer diameter fitted with an inner diameter of the core holding pipe 6 and a length half the length or less of the core holding pipe 6; core holding pipe fixing mechanisms 9 disposed to the winding collars 8 to fix the core holding pipe 6 on the winding collars 8; and friction clutch mechanisms 10 disposed to the core collars 8 to transmit the rotation of the rotary drive shaft 7 to the winding collar 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a friction winding shaft that simultaneously winds a plurality of belt-like sheets such as plastic film, paper, and metal foil around individual winding cores.

  Conventionally, the friction winding shaft has a rotational drive shaft that is rotationally driven by a rotational drive mechanism and an outer diameter that matches the inner diameter of a tubular core for winding the belt-like sheet. A plurality of winding collars mounted rotatably, a winding core fixing mechanism for fixing the winding core on each winding collar, and a rotational force of the rotary drive shaft. And a friction clutch mechanism for transmitting to the motor.

  This friction winding shaft is used, for example, when a wide belt-like sheet is divided into a plurality of narrow belt-like sheets and wound. In that case, even if the outer diameter of the strip-shaped sheet around the respective winding cores varies due to uneven thickness of the wide strip-shaped sheet during winding of the strip-shaped sheet, Can rotate in a slipping manner with respect to the rotation drive shaft, and a winding torque proportional to the number of winding collars holding the winding core is generated in the winding core. The sheet can be wound so that there is almost no difference in the winding tension per unit width of the sheet. Further, as the length of the take-up collar is shortened, the take-up tension per unit width of each belt-like sheet is made uniform so that precise take-up tension control can be performed.

  However, in the conventional friction winding shaft, when the width of the belt-like sheet is narrow, it is necessary to mount one winding core on one winding collar and wind it. In that case, the inner diameter of the winding core is slightly smaller than the outer diameter of the winding collar in order to smoothly attach and detach the winding core, so there is a gap between the inner peripheral surface of the winding core and the outer peripheral surface of the winding collar. When the length of the core (band-like sheet width) is reduced, even if the core is fixed on the winding collar by the core fixing mechanism, the inner peripheral surface of the core is supported at one place in the central axis direction. Therefore, the central axis of the winding core is easily inclined with respect to the central axis of the winding collar. Even if the belt-like sheet is wound around the core that is fixed in an inclined state, the end surface of the winding roll formed on the core becomes uneven and a defective product occurs.

If the width of the belt-like sheet is narrow, the length of the winding collar is shortened so that the winding core is not inclined with respect to the central axis of the winding collar. Although it is proposed to install a narrow core, it is difficult to provide a core fixing mechanism on a narrow winding collar or to provide a narrow friction clutch mechanism on the rotary drive shaft. There is a limit to reducing the width of the winding collar.
JP 2002-316750 A

  Therefore, the present invention provides a friction winding shaft that can appropriately hold a plurality of short cores and can simultaneously wind a narrow belt-like sheet on each core so as not to be defective. It is said.

  The friction winding shaft of the present invention includes a tubular main body that penetrates and supports a core group composed of a plurality of tubular cores for winding a belt-like sheet and a tubular spacer disposed between the cores, and the main body A winding core holding tube comprising a winding core group tightening mechanism for fastening the winding core group supported by the through-holes from both sides, a rotational drive shaft that is rotationally driven by the rotational drive mechanism, an outer diameter that matches the inner diameter of the core holding tube, and A plurality of winding collars rotatably mounted on an outer peripheral surface of the rotary drive shaft, each having at least half the length of the winding core holding tube; and the core holding provided on the winding collar. It comprises a winding core holding tube fixing mechanism for fixing the tube on the winding collar and a friction clutch mechanism for transmitting the rotation of the rotary drive shaft to the winding collar.

  According to the present invention, a core group composed of a plurality of tubular cores and a tubular spacer disposed between the cores is supported by being penetrated by the tubular body, and the core groups that are penetrated and supported by the body are arranged on both sides. Since the core is tightened and held by the core group tightening mechanism, the short core can be held so as not to tilt with respect to the core holding tube, and the core holding tube can be held by a plurality of winding collars of the main body of the winding shaft. Since it can hold | maintain, a core holding tube can be hold | maintained so that it may not incline with respect to a rotational drive shaft. Therefore, the short winding core can be properly held so as not to be inclined with respect to the rotation drive shaft. In addition, a plurality of cores are attached in advance to the core holding tube removed from the main body of the winding shaft, and the winding is resumed by attaching the core holding tube to the main body of the winding shaft when winding is stopped. Therefore, the preparation time for winding from the stop of winding to the resumption of winding can be greatly shortened. Also, since one core holding tube is held by a plurality of winding collars according to its length, one winding core holding tube has a winding torque proportional to the number of winding collars holding it. Is granted. In general, when a certain area is set in the width direction of the original belt-shaped sheet and the thickness of each part of the area is examined, the smaller the area, the smaller the maximum and minimum values of the thickness in each part. The difference between the two tends to be small. And when the belt-like sheet width is narrow, the variation in the outer diameter of adjacent winding rolls due to the thickness unevenness in the belt-like sheet width direction is reduced, and even if a plurality of short cores are mounted on a common core holding tube, The winding torque applied to the core holding tube is distributed to a plurality of cores on the core holding tube so that the winding tension per unit width generated in the belt-like sheet wound on each winding core is approximately equal. And the adverse effect of the belt-like sheet thickness ram on the winding tension tends to be reduced. Therefore, it is possible to appropriately hold a plurality of short winding cores and prevent the winding rolls of narrow strip sheets from becoming defective on each winding core, and the yield of the winding rolls of narrow strip sheets is improved. To do.

  In addition, the core group tightening mechanism includes an elastic body for elastically pushing the core group in the axial direction, so that when the tension of the belt-like sheet wound around the core becomes excessive, the core group is wound. Since it can be rotated with respect to the main body of the core holding tube, it is possible to prevent the winding tension of a specific belt-like sheet from becoming excessive.

  The structure of the core holding tube was simplified and the core holding tube was easily attached to and detached from the winding shaft main body.

  FIG. 1 is an explanatory view of a friction winding shaft according to an embodiment of the present invention, FIG. 1 (A) shows the front of the main part of the friction winding shaft, and FIG. 1 (B) is a cut in FIG. 1 (A). The state which looked at the cross section along line AA in the direction of arrow B is shown. The illustrated friction winding shaft has a tubular shape that penetrates and supports a winding core group 3 including a plurality of tubular winding cores 1 for winding the belt-like sheet S and a tubular spacer 2 disposed between the winding cores 1. A main body 4 and a core holding tube 6 including a core group tightening mechanism 5 for tightening the core group 3 penetratingly supported by the tubular main body 4 from both sides, and a rotational drive that is rotationally driven by a rotational drive mechanism (not shown). A plurality of winding collars rotatably mounted on the outer peripheral surface of the rotary drive shaft 7 having an outer diameter matching the inner diameter of the shaft 7 and the core holding tube 6 and at least half the length of the core holding tube 6 8, a winding core holding tube fixing mechanism 9 provided on the winding collar 8 for fixing the winding core holding tube 6 on the winding collar 8, and friction for transmitting the rotation of the rotary drive shaft 7 to the winding collar 8. The clutch mechanism 10 is included.

  The core tightening mechanism 5 in the core holding tube 6 includes a flange portion 11 provided at one end of the tubular main body 4 and a nut 13 that is screwed into a screw 12 formed at the other end of the main body 4. Grooves 11 a and 13 a for hooking the hook spanner are formed on the outer peripheral surfaces of the flange portion 11 and the nut 13.

  The rotary drive shaft 7, the winding collar 8, the core holding tube fixing mechanism 9 and the friction clutch mechanism 10 constitute a main body MB of the friction winding shaft. This main body MB is disclosed in Japanese Patent Application Laid-Open No. 2002-316750. As in the case of the described friction winding shaft, it can be attached to and detached from the winding position of the winder. When the main body MB is mounted at the winding position, the rotary drive shaft 7 is connected to a bearing provided at one end thereof and the other. A rotational center engaged with one end is rotatably supported and a rotational driving force is transmitted.

  Further, the winding collar 8 is mounted on the rotary drive shaft 7 so as to be rotatable by a pair of rolling bearings, and the core holding tube fixing mechanism 9 is provided on the outer peripheral surface of the winding collar 8 as shown in FIG. A plurality of inclined grooves 14 that extend in the circumferential direction at equal angles in the radial direction from the center of the rotational drive shaft 7, the spheres 15 disposed in the respective inclined grooves 14, and the spheres 15 at deep portions of the grooves 14. And an annular holding member 16 that is rotatably attached to the winding collar 8 and is held so as to be movable in the direction of the shallow portion or in the opposite direction. During the winding, the rotary drive shaft 7 is rotated in the clockwise direction in FIG. 1B, and the core holding tube 6 receives the rotational force due to the belt-like sheet winding tension so as to prevent the rotation. Moves to the shallow portion of the groove 14 and protrudes from the outer peripheral surface of the annular holding member 16 to push the inner peripheral surface of the core holding tube 6, thereby fixing the core holding tube 6 on the winding collar 8. it can.

  In addition, the friction clutch mechanism 10 is provided in the axial direction of the hole 17 in the hole 17 provided in the rotary drive shaft 7 so as to correspond to each winding collar 8, as in the friction winding shaft described in JP-A-2002-316750. The rod-like friction member 18 slidably inserted into the shaft, and the friction member 18 is pressed against the inner peripheral surface of the winding collar 8 by being supplied with compressed air and provided in the hollow portion of the rotary drive shaft 7. The hose 19 is made of an elastic hose 19 that can be extended to the vicinity of the end of the rotary drive shaft 7.

  In the case of this embodiment, in order to prevent the core holding tube 6 from shifting in the axial direction with respect to the rotary drive shaft 7 during the winding stop, the friction winding shaft is a known winding disposed between the winding collars 8. A center side misalignment prevention ring 20 is provided.

  In order to wind a plurality of belt-like sheets by attaching the core to the friction winding shaft configured as described above, first, the end of the main body 4 is removed with the nut 13 removed from the main body 4 of the core holding tube 6. The cores 1 and the spacers 2 are alternately fitted from the portion to form the core group 3, and then the nut 13 is attached to the main body 4, and the core group 3 is tightened and fixed to the main body 4. Next, the core holding tube 6 on which the core group 3 is mounted is mounted on the main body MB by fitting the outer periphery of the winding collar 8 group from the free end of the rotary drive shaft 1. Thereafter, the main body MB is attached to a predetermined winding position, and the position of the core holding tube 6 is adjusted so that the core 1 attached to the core holding tube 6 corresponds to the supply position of the belt-like sheet S. Next, after adhering the leading end portion of the belt-like sheet S to each core 1, the rotary drive shaft 7 is rotationally driven at a speed slightly higher than the rotational speed corresponding to the feeding speed of the belt-like sheet, and compressed air is supplied to the hose 19. Supply and take up.

  When compressed air is supplied into the hose 19, the friction member 18 is pressed against the inner peripheral surface of the winding collar 8 with a required force, and according to the frictional force between the friction member 18 and the inner peripheral surface of the winding collar 8. Since the rotational force is transmitted from the rotational drive shaft 7 to the winding collar 8 and the core holding tube 6 is fixed on the winding collar 8 by the core holding tube fixing mechanism 9, the rotational force of the winding collar 8 is wound. Via the core holding tube 6, it is distributed and transmitted to each core C on the core holding tube 6. Then, the inner peripheral surface of the winding collar 8 and the friction member 18 slip by an amount corresponding to the rotational speed of the rotary drive shaft 7 being higher than the rotational speed of the winding core C corresponding to the supply speed of the belt-like sheet S, and the winding collar. 8 rotates with respect to the rotational drive shaft 7 with a delay. Therefore, it is possible to prevent excessive tension from being generated in the belt-like sheet.

  When the winding is finished, the main body MB is removed from the winding position, the core holding tube 6 together with the winding roll is extracted from the main body MB, and then the nut 13 is removed from one end of the main body 4 of the core holding tube 6. And take up the winding roll together with the core 1.

  FIG. 2 is an explanatory view according to another embodiment of the core holding tube, and the core group tightening mechanism 5 includes an elastic body 21 for elastically pushing the core group 3 in the axial direction. The elastic body 21 is disposed between the nut 13 and an annular movable plate 22 slidably attached to the outer peripheral surface of the main body 4. In FIG. 2, although it is a disc spring, other elastic springs, rubber, etc. May be used. In the core holding tube 6, the elastic group 21 elastically pushes the core group 3 toward the flange 11 through the movable plate 22 in the axial direction, so that the tightening force of the core group 3 is approximately constant and appropriate. The friction force according to the tightening force is generated on the end surface of the core 1, and the core 1 is restrained by the main body 4 of the core holding tube 6 with the restraining force according to the friction force. Is done. On the other hand, a rotational force due to the winding tension of the belt-like sheet acts on each of the plurality of cores 1 held by the core holding tube 6, and when this rotational force becomes larger than the restraining force, the core 1 is turned into the core holding tube 6. Rotate relative to the main body 4. Therefore, even if the winding tension of a specific belt-like sheet among the belt-like sheets wound all at once is increased, the rotational force of the core 1 of the specific belt-like sheet becomes larger than the restraining force, and the winding core. Since 1 rotates while slipping with respect to the main body 4 of the core holding tube 6, it is possible to prevent an excessive winding tension from being generated in a specific belt-like sheet.

It is explanatory drawing of the friction winding shaft which concerns on one Example of this invention. It is explanatory drawing which concerns on another embodiment of a core holding tube.

Explanation of symbols

S belt-like sheet 1 core 2 spacer 3 core group 4 body 5 core group tightening mechanism 6 core holding tube 7 rotary drive shaft 8 winding collar 9 core holding tube fixing mechanism 10 friction clutch mechanism 11 flange 12 screw 13 Nut 18 Friction member 19 Hose 21 Belleville spring 22 Movable plate

Claims (3)

  A tubular main body that penetrates and supports a core group composed of a plurality of tubular cores for winding a belt-like sheet and a tubular spacer disposed between the cores, and a core group that the main body penetrates and supports A core holding tube comprising a core group tightening mechanism that is tightened from both sides, a rotation drive shaft that is rotationally driven by a rotation drive mechanism, an outer diameter that matches the inner diameter of the core holding tube, and at least the length of the core holding tube A plurality of winding collars rotatably mounted on the outer peripheral surface of the rotary drive shaft, and the core holding tube provided on the winding collar is fixed on the winding collar. A friction winding shaft comprising a winding core holding tube fixing mechanism and a friction clutch mechanism for transmitting the rotation of the rotary drive shaft to the winding collar.   The core group tightening mechanism includes a nut provided at the other end of the main body for fastening and fixing the core group toward a flange provided at one end of the main body. The friction winding shaft according to 1.   The friction winding shaft according to claim 1, wherein the core group tightening mechanism includes an elastic body for elastically pushing the core group in the axial direction.

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