JP4706963B2 - Core support shaft - Google Patents

Description

  The present invention is a winding in which a strip-shaped sheet such as a plastic film or a metal foil is held through a tubular core for winding and supported at both ends by a pair of push cups provided in the strip-shaped sheet winding device or unwinding device. The core support shaft.

  In general, a pair of push cups are formed in a cone shape at the tip, and are attached to the tips of a pair of rotating shafts arranged on a common center axis so as to face each other. It is possible to advance and retreat. In order to support both ends of the core support shaft by a pair of push cups, the core support shaft is arranged so as to be concentric between the pair of push cups that are retracted and waiting, and then the pair of push cups are respectively The cone-shaped tip is fitted into holes provided at both ends of the core support shaft.

  Conventionally, the core support shaft is provided with a movable rod slidable in the axial direction on the central axis of the hollow portion of the support shaft body, the movable rod is advanced from the standby position, and a plurality of slidably attached to the movable rod is mounted. Each of the lug pushers is elastically pushed in a forward direction via a disc spring, and the lugs are respectively formed on the lug pushers by a plurality of inclined surfaces with a predetermined rotation angle about the central axis of the movable rod. Push up, project the tip of the lug from the opening provided in the support shaft, and support the core by pressing the inner peripheral surface of the core that fits the tip of the lug to the outer surface of the support shaft Some are fixed to the shaft. This winding core support shaft includes a cylinder and a piston for moving the movable rod forward, supplies compressed air into the cylinder, operates the biston, and advances the movable rod with the biston, thereby supporting shaft body The core that is fitted to the outer peripheral surface is fixed.

However, when both ends of the core support shaft are supported by a pair of push cups, the core support shaft is completely removed from the winding device or the rewinding device when the core is attached or detached. When fixing on the top, it is necessary to supply compressed air into the cylinder through a plug provided near the end of the core support shaft, and to remove the compressed air through the plug when removing the core. For this reason, the fixing and removing work of the core is troublesome and takes time.
JP 2002-114414 A

  Therefore, the present invention automatically supports a core that is fitted to the outer periphery of the core support shaft in advance by simply supporting both ends with a pair of push cups provided in the winding device or the rewind device. It is a problem to be able to fix it.

  The present invention relates to a core support shaft that penetrates and holds a tubular winding core and is supported at both ends by a pair of pressing cups provided in a belt-like sheet winding device or a rewinding device, and fitted with the pair of pressing cups. A hollow support shaft body having both ends formed with holes or protrusions to be combined, a movable rod provided in the hollow portion of the support shaft body so as to be movable in the central axis direction, and a plurality of fittings fitted on the outer peripheral surface of the movable rod A cam member, a means for transmitting the forward and backward movement of the movable rod to the cam member, and formed on a plurality of locations on the outer peripheral surface of the cam member with a predetermined rotation angle about the central axis of the movable rod. An inclined surface that is inclined so as to be lowered in the forward direction of the movable rod, an opening provided at a position corresponding to the inclined surface of the outer peripheral surface of the support shaft body, and the cam inserted into the opening and the cam Slidably mounted on the inclined surface of the member A lug, a forward elastic body for elastically pushing the movable bar toward the forward side, provided at one end on the backward side of the movable bar, and the movable bar provided at one end on the forward side of the movable bar A retraction elastic body for elastically pushing the retraction side toward the retreat side, and a push screw screwed to the end of the support shaft body on the movable rod advance side, which pushes the retraction elastic body toward the movable rod. And the forward elastic body can be pushed toward the movable bar by one of the pair of push cups.

  In the present invention, a forward elastic body for elastically pushing the movable bar forward is provided at one end of the movable bar on the backward side, and the backward elastic body for elastically pushing the movable bar backward is movable. By providing it at one end on the forward side of the rod and pushing the elastic body for advancement toward the movable rod by a push cup that fits into the hole or protrusion on the end of the movable shaft on the backward side of the support shaft. The core can be automatically fixed to the core support shaft by simply passing the core through the core support shaft in advance and attaching the core support shaft to a pair of push cups. Supply of compressed air to the shaft is completely unnecessary. Further, by attaching a push screw that pushes the elastic body for retraction toward the movable rod at the end of the support shaft on the movable rod advance side, the pressing force of the lug on the inner peripheral surface of the core can be adjusted. Therefore, when using a thin core or a thick core according to the specifications of the winding product, or when the inner diameter of the core used is slightly different depending on the manufacturer or application, etc. It is possible to prevent the winding core from being deformed or damaged due to an excessive pressing force, and slip rotation of the winding core (winding roll) due to insufficient pressing force of the lug. Therefore, it is possible to obtain a core support shaft having a simple structure that is easy to handle and can appropriately hold cores having slightly different thicknesses and inner diameters according to the specifications of the wound product.

  The core is held concentrically with a simple structure.

  FIG. 1 is a longitudinal sectional view of a core support shaft according to an embodiment of the present invention. FIG. 2 is a perspective view of the core support shaft shown in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted the center part and showed the state which supported both ends with the push cup.

  The core support shaft 1 is centered on a hollow support shaft body 4 having both ends 4a and 4b in which holes 3 are fitted to the tip portions 2e of a pair of push cups 2A and 2B, and a hollow portion of the support shaft body 4. A movable bar 5 movably provided in the axial direction, a plurality of cam members 6 mounted on the outer peripheral surface of the movable bar 5, means 7 for transmitting the forward and backward movement of the movable bar 5 to the cam member 6, and the cam member 6 Are formed at a plurality of positions with a predetermined rotation angle around the central axis of the movable bar 5, and are inclined so as to be lowered in the forward direction of the movable bar 5, and the support shaft 4. Of the outer peripheral surface of the cam member 6, and an opening 9 formed at a position corresponding to the inclined surface 8, a lug 10 inserted into the opening 9 and slidably mounted on the inclined surface 8 of the cam member 6, A forward elastic body 11 provided at one end to elastically push the movable bar 5 forward; Provided at one end of the movable bar 5 on the forward side, the retracting elastic body 12 for elastically pushing the movable bar 5 backward, and the supporting shaft body 4 for pushing the backward elastic body 12 toward the movable bar 5 And a push screw 13 screwed to the end 4a on the movable rod advance side.

  In the case of this embodiment, the core support shaft 1 is used to mount the winding roll R on the belt-shaped sheet unwinding device, and penetrates and holds the tubular core C of the winding roll R. Both ends are supported by push cups 2A and 2B. The pair of push cups 2A, 2B is provided in the belt-like sheet unwinding device so as to be movable back and forth in the central axis direction so that the core support shaft 1 can be attached and detached.

  The tip portions 2e of the pair of push cups 2A, 2B are formed in a cone shape, and the hole 3 is a tapered hole. The elastic body 11 for advance is accommodated in the hollow part of the cylindrical holding body 14, and the end of the holding body 14 on the side of the push cup 2B is closed. When the holding body 14 is slidably mounted in the center axis direction in the hole 15 provided in the back of the hole 3 on the movable shaft retracting side of the support shaft body 4, and the core support shaft 1 is not supported by the push cups 2A and 2B. The end (rear end) of the holding body 14 on the push cup 2B side protrudes from the hole 15 to the outer hole 3. Therefore, when both ends of the core support shaft 1 are supported by the pressing cups 2A and 2B, the front end portion 2e of the pressing cup 2B inserted into the hole 3 of the end portion 4b of the supporting shaft body 4 is the rear end portion of the holding body 14. The forward elastic body 11 can be pressed against the movable bar 5 by pressing. Accordingly, the forward elastic body 11 can be pushed toward the movable bar 5 by the push cup 2B fitted into the hole 3 of the end 4b of the support shaft 4 on the retracting side of the movable bar.

  In order to prevent the holding body 14 from falling out of the hole 15, a flange portion 14 a is formed on the outer periphery of the front end portion of the holding body 14 so that the hook portion 14 a is caught by the end portion 4 b of the support shaft body 4. It is.

  The retraction elastic body 12 is accommodated in a hollow portion of a cylindrical holding body 16 fixed to the end portion on the advance side of the movable bar 5.

  The push screw 13 is screwed into a female screw 17 formed at the end 4a of the support shaft body 4, and can be moved in the direction of the central axis by inserting a wrench into the hexagonal hole of the head and turning it. The distal end portion 13 a can be inserted into the hollow portion of the holding body 16 and the retreating elastic body 12 can be pushed.

  When fixing the winding core C, each cam member 6 is elastically pushed toward the forward side (right side in FIG. 1) of the movable rod 5, and when releasing the winding core C, each cam member 6 is moved backward together with the movable rod 5. In order to be able to do this, the cam member 6 is slidably fitted to the outer peripheral surface of the movable bar 5 and the means 7 for transmitting the forward and backward movement of the movable bar 5 to the cam member 6 is provided, and the backward movement of the movable bar 5 is cammed. The forward locking body 18 fixed to the movable bar 5 on the forward side of each cam member 6 that transmits to the member 6 and the forward movement elastic body 11 that transmits the forward movement of the movable bar 5 to the cam member 6 are the most. The forward locking body 19 fixed to the movable rod 5 on the back side of the near cam member 6 and the cam member 6 closest to the forward elastic body 11 of the cam member 6 and the forward locking body 19. , And a movable bar provided between the other cam member 6 and the backward locking body 18. It is constituted by a cam member for resiliently body 20 which transmits the movement in the forward direction to resiliently cam member 6.

  The forward elastic body 11 is composed of a compression coil spring, the backward elastic body 12 is composed of a compression coil spring having a spring constant smaller than that of the compression coil spring 11, and the cam member elastic body 20 is composed of a plurality of disc springs. The spring constant of the cam member elastic body (a plurality of disc springs) 20 is made larger than the spring constant of the backward elastic body 12, and the spring constant of the forward elastic body 11 is made larger than the spring constant of the backward elastic body 12. Therefore, even if the pushing amount of the advance elastic body 11 by the push cup 2B is small, the pressing force of the lug 10 against the inner peripheral surface of the core C can be increased.

  As shown in FIG. 3, the cam member 6 is formed of a cylindrical member having an outer peripheral surface that matches the inner peripheral surface of the hollow portion of the support shaft body 4, and is slidably fitted to the inner peripheral surface of the hollow portion of the support shaft body 4. Therefore, the pressing force received from the lug 10 can be supported by the inner peripheral surface of the support shaft body 4, and the winding core C is supported eccentrically with respect to the support shaft body 4 due to the weight of the winding roll and the like. Can be prevented.

  In order to allow the cam members 6 to push up the lugs 10 in the radial direction at the same time, the inclined surfaces 8 are formed at the same height from the center of the cam member 6 at the same inclination angle. The inclination angle of the surface 8 is made smaller than the friction angle so that the cam member 6 does not move backward due to the load acting on the upper end of the lug 10. The bottom surface of the groove 21 formed in the cam member 6 is inclined so that the lug 10 is securely held by the cam member 6 so as not to fall off and the protruding lug 10 is forcibly retracted as the cam member 6 moves backward. A narrow groove 21 b extending along the inclined surface 8 is formed on the side surface of the groove 21 as the surface 8, and a ridge portion 10 a that is slidably fitted in the narrow groove 21 b is provided on the side surface of the lug 10.

  As shown in FIG. 2, the pair of push cups 2A, 2B is fixed to the tips of the rewinding shafts 2a, 2b that can be rotated. The rewinding shaft 2b is connected with a brake device (not shown) capable of adjusting the braking torque, the key 2k is provided at the tip 2e of the push cup 2B, and the end 4b of the support shaft 4 is notched to receive the key 2k. 22 is formed. Therefore, when the core support shaft 1 is attached to the pair of push cups 2A, 2B, a braking torque can be applied to the core support shaft 1.

  In order to attach the take-up roll R to the belt-like sheet unwinding device using the core support shaft 1 configured as described above, the core C of the take-up roll R is penetrated by the core support shaft 1 and the winding is performed. After the core support shaft 1 is disposed concentrically between the pair of push cups 2A and 2B that are retracted and waiting, the pair of push cups 2A and 2B are advanced together with the rewinding shafts 2a and 2b, respectively, and the tip ends thereof. As shown in FIG. 2, the core support shaft 1 is supported at both ends by fitting 2 e into the holes 3 in both ends 4 a and 4 b of the support shaft body 4 of the core support shaft 1.

  Since the thrust of the push cups 2A and 2B is sufficiently larger than the repulsive force of the retracting elastic body 12, when the tip portions of the push cups 2A and 2B are fitted to both end portions of the support shaft body, the tip of the push cup 2B is The holding body 14 is pushed, the holding body 14 advances from the position shown in FIG. 1 to the position shown in FIG. 2, the forward elastic body 11 is compressed, and the movable bar 5 is pushed in the forward direction indicated by the arrow A to move. The rod 5 moves to the position shown in FIG. 2 and the retracting elastic body 12 is compressed. Thereby, the cam member 6 is elastically pushed via the cam member elastic body 20 and moves forward. At this time, a thrust having a magnitude obtained by subtracting the repulsive force of the backward elastic body 12 from the repulsive force of the forward elastic body 11 acts on each cam member 6 in a substantially uniform manner. Since each lug 10 is held in the opening 9, the lug 10 does not move in the forward direction of the cam member 6, and is pushed up by the inclined surface 8 on the moving cam member 6 to be wound on the support shaft 4. The core C is pressed against the inner peripheral surface of C, whereby the core C is fixed on the support shaft body 4. In the case of this embodiment, even if there is a portion where the inner diameter is slightly different in the longitudinal direction of the core C by elastically pushing each cam member 6 in the forward direction of the movable bar 5, the inner diameter of the core C is large. Accordingly, the advancement amount of each cam member 6 and the push-up amount of the lug 10 by the inclined surface 8 are automatically adjusted, so that the core C can be reliably fixed and the core C can be prevented from being damaged. be able to.

  In order to remove the core support shaft 1 from the rewinding device, the pair of push cups 2A, 2B are retracted from the end portions 4a, 4b of the support shaft body 4. When the pair of push cups 2A, 2B are retracted, the movable bar 5 is pushed by the retraction elastic body 12 and moves in the direction opposite to the direction indicated by the arrow A, and the movable bar 5 and the advance elastic body are moved as shown in FIG. 11 and its holding body 14 return to the standby position, and each cam member 6 is pushed back by the retracting locking body 18 on the movable bar 5 to return to the original position. With the return of the cam member 6, The protrusion 10a in the inclined narrow groove 21b of the cam member 6 shown in FIG. 3 receives a pressing force, and the lug 10 is pressed down, whereby the core C is released from the lug 10 and the core support shaft 1 is released. Then, the core C is extracted from the core support shaft 1.

  When it is desired to reduce the holding force of the core C by the core support shaft 1, the pressing screw 13 is advanced toward the retraction elastic body 12 to reduce the pressing force of the lug 10. On the contrary, when it is desired to increase the holding force of the core C by the core support shaft 1, the push screw 13 is retracted to increase the pressing force of the lug 10.

  FIG. 4 shows another embodiment of the present invention, in which the core support shaft 1 is slidably fitted to the outer peripheral surface of the movable bar 5 in order to elastically push the cam members 6 respectively. A means 7 for transmitting the forward and backward movement of the movable bar 5 to the cam member 5 and a reverse mechanism fixed to the movable bar 5 on the forward side of the cam member 6 for transmitting the backward movement of the movable bar 5 to the cam member 6, respectively. The stop 18, the forward movement of the movable bar 5 is transmitted to the cam member 6, the forward locking body 19 fixed to the movable bar 5 on the backward side of the cam member 6, and the forward movement of the movable bar 5 Is elastically transmitted to the cam member 6 and is provided with a cam member elastic body 20 provided between the cam member 6 and the forward locking body 19, respectively. Further, cone-shaped projections 4e are provided at both end portions 4a and 4b of the support shaft body 4, and tapered holes 23 to be fitted to the projections 4e are provided at the tips of the push cups 2A and 2B. Further, a shaft bar 14b is provided at the end of the holding cup 14 for holding the forward elastic body 11 on the side of the push cup 2B, and the shaft bar 14b slidably penetrates a hole formed in the end 4b of the support shaft 4. When the core support shaft 1 is supported at both ends by the pair of push cups 2A and 2B, the tip of the shaft bar 14b protruding from the tip of the protrusion 4e can be pushed by the bottom 23a of the tapered hole 23 of the push cup 2B. It is. Further, in order to prevent the movable rod 5 from being bent due to the load received by the lug 10 from the core C and the core C being held eccentrically with respect to the support shaft body 4, a support ring is provided at a predetermined position in the hollow portion of the support shaft body 4. The movable rod 5 is slidably fitted on the inner peripheral surface of the support ring 24 so that the movable rod 5 can be supported by the support ring 24. The cam member elastic body 20 is composed of a compression coil spring. Further, the core support shaft according to the present invention can be attached to a winding device as needed to be used for winding a belt-like sheet.

It is a longitudinal cross-sectional view of the core support shaft which concerns on one Example of this invention. It is a longitudinal cross-sectional view which shows the state which mounted | worn with the winding roll to the core support shaft shown in FIG. 1, and mounted | worn the core support shaft to a pair of push cup. It is sectional drawing which looked at the cross section along the cutting line DD of the winding core support shaft shown in FIG. It is a longitudinal cross-sectional view of the core support shaft which concerns on the other Example of this invention.

Explanation of symbols

C core R winding roll 1 core support shaft 2A push cup 2B push cup 3 taper hole 4 support shaft body 4a end 4b end 5 movable rod 6 cam member 7 motion transmission means 8 inclined surface 9 opening 10 lug 11 advance Elastic body (compression coil spring)
12 Elastic body for retraction (compression coil spring)
13 Push screw 15 Hole 18 Retraction locking body 19 Advance locking body 20 Cam member elastic body

Claims (1)

  A core support shaft for penetrating and holding a tubular winding core and supported at both ends by a pair of pressing cups provided in a belt-like sheet winding device or a rewinding device, wherein the holes or protrusions fit into the pair of pressing cups A hollow support shaft body having both ends formed, a movable rod provided in the hollow portion of the support shaft body so as to be movable in a central axis direction, and a plurality of cam members mounted on an outer peripheral surface of the movable rod; Means for transmitting the forward and backward movement of the movable rod to the cam member, and the outer peripheral surface of the cam member are formed at a plurality of positions with a predetermined rotation angle about the central axis of the movable rod, respectively, An inclined surface inclined so as to be lowered in the forward direction of the rod, an opening provided at a position corresponding to the inclined surface of the outer peripheral surface of the support shaft body, and an inclined surface of the cam member inserted into the opening Slug slidably attached to A forward elastic body provided at one end of the movable rod on the backward side to elastically push the movable rod forward, and the movable rod provided at one end on the forward side of the movable rod. A retraction elastic body for elastically pushing to the movable rod, and a push screw screwed to the end of the support shaft body on the movable rod advance side, which pushes the retraction elastic body toward the movable rod, A core support shaft, characterized in that the forward elastic body can be pushed toward the movable rod by one of a pair of push cups.

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