JP5136959B2 - Core ball lock device - Google Patents

Description

  The present invention relates to a core ball lock device for a winding shaft that penetrates and supports a hollow core when winding a belt-like sheet or a wire rod.

  The above-described core ball rack device is for fixing a hollow core covering the outer periphery of the drum member of the winding shaft to the drum member, and conventionally, for example, as disclosed in Patent Document 1 below, Formed at equal intervals at a plurality of locations in the circumferential direction on the outer peripheral side, and composed of inclined grooves whose bottom surfaces are inclined in a tangential direction with respect to the outer peripheral surface, spheres accommodated in the respective inclined grooves, and holding rings for the respective spheres There is. In this core ball lock device, the width of the inclined groove is substantially equal to the diameter of the sphere, and the side surfaces standing along both edges of the bottom surface of the inclined groove extend in parallel to each other. And is restrained in the width direction of the body member. The holding ring is rotatably mounted concentrically on the outer periphery of the body member, and has a window portion formed at intervals in the circumferential direction so as to correspond to each inclined groove, and a sphere is placed in this window portion. Thus, each sphere is held so as to roll off in the direction from the deep part to the shallow part along the bottom surface of the inclined groove or in the opposite direction so that it does not fall off the inclined groove. Therefore, when the winding core is rotated in the direction in which the inclined groove becomes shallower with respect to the body member, the rotation causes the sphere to move to the shallow portion of the inclined groove, and at the same time, the holding ring rotates with respect to the body member. Equal amounts of protrusion from the outer peripheral surface of the body member press the inner peripheral surface of the core. That is, according to this core ball locking device, the core can be firmly held on the body member by the wedge action of the sphere between the bottom surface of the inclined groove and the inner peripheral surface of the core. During winding of the belt-like sheet, the tension force of the belt-like sheet always acts on the winding core to rotate the winding core in the direction in which the inclined groove becomes shallower. Can be fixed to the body member.

  In addition, in order to release the core fixed by the core ball lock device, the sphere pressing the inner peripheral surface of the core is moved from the shallow part to the deep part of the inclined groove and retracted into the body member. Just do it.

  However, the friction between the spherical body and the inner peripheral surface of the core and the bottom surface of the inclined groove is caused only by stopping the rotational driving of the winding shaft and eliminating the rotational force of the core, so that the sphere tries to return to the deep part of the inclined groove. Since the force and the frictional force between the holding ring and the body member are hindered, the sphere does not return from the shallow part of the inclined groove to the deepest part. Further, since the side surface of the inclined groove is perpendicular to the width direction of the body member, the sphere does not return to the deep part of the inclined groove simply by moving the winding core in the width direction of the body member. For this reason, when the winding shaft is removed from the winding roll, the sphere is often in a state of protruding from the outer peripheral surface of the body member. In this state, if the winding shaft is removed from the take-up roll, the inner peripheral surface of the roll core may be scratched by a sphere, and the roll core cannot be reused, or the take-up roll may be defective. The problem arises. In particular, many recent winding machines are equipped with a winding shaft extraction mechanism in order to save the work of extracting the winding shaft from the winding roll, and the winding force is pulled by the driving force of the winding shaft extraction mechanism regardless of manual operation. This problem becomes significant when the shaft is forcibly removed. Therefore, before removing the winding shaft from the winding roll, it is necessary to securely move the sphere to the deep part of the inclined groove. Conventionally, the center axis of the winding shaft is rotated in order to unlock the winding core. The ball is returned to the deep part of the inclined groove by rotating the winding roll in the direction opposite to that during winding or holding the winding roll non-rotatably and driving the central axis in reverse. Yes.

However, it is troublesome and cumbersome to manually perform the operation of rotating the winding roll in the direction opposite to that during winding while holding the central axis of the winding shaft in a non-rotatable manner. In particular, when a large number of belt-like sheets are wound up simultaneously with a single winding shaft, further labor is required. Also, it takes a lot of labor to manually rotate the center shaft in a non-rotatable manner by holding the winding roll. Also, a mechanism for rotating the winding roll in the direction opposite to that during winding by holding the central axis of the winding axis in a non-rotatable state, or driving the central axis in the reverse direction by holding the winding roll in a non-rotatable state. If the mechanism for this is provided in a winding machine, a winding machine will become complicated and equipment cost will increase.
Japanese Patent No. 2678482

  SUMMARY OF THE INVENTION Accordingly, the present invention provides a core ball lock device that enables the core to be easily and smoothly removed from the winding shaft after the winding is completed, and that prevents the inner peripheral surface of the core from being damaged when the core is removed from the winding shaft. It is an issue.

  The present invention provides a plurality of inclined grooves disposed on the body member of the winding shaft at intervals in the circumferential direction and having a bottom surface inclined so as to form a deep portion and a shallow portion in the circumferential direction; Each sphere is accommodated in a sphere arranged in each groove and a window provided for each sphere so that a part of the sphere can protrude from the window, and the sphere can roll on the bottom surface of the inclined groove and cannot fall off. In a core ball lock device for fixing a hollow core disposed on the body member by being fitted from the tip of the winding shaft to the body member, the winding of the inclined groove of the body member is provided. A guide plate made of an elastic body that extends along the inclined groove and extends in the width direction in the inclined groove on the shaft tip side portion to partition the inclined groove and the containing groove is provided in the guide. While accommodating in the accommodation groove so that the tip of the plate faces the deep part side of the inclined groove, The guide plate is fixed to the body member on the rear end side of the guide plate so that the front end side of the guide plate can be bent in the width direction of the receiving groove, and the sphere can move on the bottom surface of the inclined groove to the front end side of the winding shaft. The window portion is extended in the width direction of the body member.

  According to the present invention, when the take-up roll is removed from the winding shaft together with the winding core, even if a part of the sphere protrudes from the outer peripheral surface of the body member at the beginning, the sphere is wound around the winding shaft of the winding core. With the movement in the distal direction, it automatically returns to the deep part of the inclined groove and fully retracts into the body member. Therefore, after the winding is completed, the winding roll can be easily and smoothly removed from the winding shaft together with the winding core, and when the winding core is pulled out from the winding shaft, the core ball lock device is less likely to damage the inner peripheral surface of the winding core. Can be provided. Even in a winding machine configured to extract the winding roll from the winding shaft by the extraction or extrusion driving force of the winding shaft extraction mechanism or the winding roll push-out mechanism, the winding core is automatically extracted from the body member of the winding shaft. Therefore, it is not necessary to separately equip a complicated and large-scale device for releasing the wire, and the core can be removed from the winding shaft in a short time.

  FIG. 1 is a front view of a winding shaft including a core ball locking device according to an embodiment of the present invention. The winding shaft 1 is used for penetrating and supporting a hollow core C for winding a belt-like sheet, and includes a plurality of cylindrical body members 2 for supporting the core C from the inside, and a body member 2. The core shaft 3 that is concentrically supported and the core C placed on the body member 2 by being fitted from the front end of the winding shaft 1 are attached to the body member 2 so that the core C does not rotate around the body member 2. And a core ball lock device 4 to be fixed.

  2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a front view showing the upper half of the main part of the winding shaft in a section along the central axis, and the core ball lock device 4 is attached to the body member 2. An inclined groove 5 having a bottom surface 5c inclined so as to form a deep portion 5b and a shallow portion 5a in the circumferential direction of the body member 2 formed at a plurality of locations in the circumferential direction, and a sphere 6 disposed in the inclined groove 5 respectively. In addition, each sphere 6 is accommodated in a window 7 provided for each sphere 6 so that a part of the sphere 6 can protrude from the window 7, and the sphere 6 can roll on the bottom surface 5 c of the inclined groove 5 and cannot fall off. And holding ring 8 to hold.

  The retaining ring 8 corresponds to each sphere 6 so that a part of the sphere 6 can protrude from the window 7 and the sphere 6 can roll on the bottom surface 5c of the inclined groove 5 and cannot fall off. As shown in FIG. 2, the window portion 7 is formed in a substantially trapezoidal shape as shown in FIG. The width of the upper edge of the window 8 is slightly smaller than the diameter of the sphere 6, the width of the lower edge is slightly larger than the sphere 6, and the left and right edges extend from the lower edge to the vicinity of the upper edge. Extending in parallel, the upper part thereof is curved along the upper part of the sphere 6, and the holding ring 8 is constrained to the body member 2 in the width direction and is rotatably mounted concentrically.

  Further, as shown in FIGS. 4 to 6, the core ball lock device 4 extends along the inclined groove 5 to a portion of the body member 2 on the front end side (right side in FIG. 4) of the inclined groove 5. At the same time, an accommodating groove 9 is formed in the body member 2 in the width direction of the inclined groove 5, and an elastic guide plate 10 for partitioning the inclined groove 5 and the accommodating groove 9 as shown in FIG. The guide plate 10 is accommodated in the accommodation groove 9 so as to face the deep portion 5 b side of the inclined groove 5, and the rear end side of the guide plate 10 can be bent in the width direction of the accommodation groove 9. As shown in FIG. 3, the window portion 7 of the holding ring 8 is extended in the width direction of the body member 2 so that the sphere 6 can move in the width direction on the bottom surface 5 c of the inclined groove 5.

  In order to make the structure for attaching the guide plate 10 to the body member 2 relatively simple and to enable the guide plate 10 to be easily attached to the body member 2, the guide plate 10 is provided as shown in FIGS. A material made of spring steel is formed by bending it into a hairpin shape, a bent portion 10a, a long straight guide portion 10b on one side of the bent portion 10a, and a short straight extension holding on the other side Part 10c. And the guide part 10b becomes the front end side of the guide plate 10, and the holding part 10c becomes the rear end side of the guide plate 10. Further, the radius of the bent portion 10a is half the width of the receiving groove 9, and the notch 11 is formed in the holding portion 10c. Further, the body member 2 has a hole 12 that communicates from the end surface on the winding core side to the receiving groove 9 at a position corresponding to the notch 11 of the holding portion 10 c when the guide plate 10 is received in the receiving groove 9. is there. In order to accommodate the guide plate 10 in the accommodation groove 9 and fix the rear end side of the guide plate 10 to the body member 2, the bent portion 10 a of the guide plate 10 is directed to the rear end side of the accommodation groove 9 and the guide portion 10b is fitted into the accommodation groove 9 along the side surface of the accommodation groove 9 on the inclined groove side, a pin 13 is fitted into the hole 12 formed in the body member 2, and protrudes from the side surface of the accommodation groove 9 into the notch 11 of the holding portion 10c. The tip of the pin 13 is engaged and restrained. Before the guide plate 10 is mounted, as shown in FIG. 8, the guide portion 10b and the holding portion 10c are not parallel to each other and are opened at a predetermined angle toward the distal end side of the housing groove 9. When mounting on the body member 2, the guide plate 10 is fitted in the receiving groove 9 with the gap between the guide portion 10 b and the holding portion 10 c of the guide plate 10 being narrower than the width of the receiving groove 9. Since the guide plate 10 is elastic, when the guide plate 10 is fitted in the accommodation groove 9, the guide portion 10 b and the holding portion 10 c open along both side surfaces of the rear end portion of the accommodation groove 9. It will be in the state extended at right angles to the width direction.

  In the case of this embodiment, a ball plunger 14 is provided on the holding ring 8, and when the core C is turned and fixed to the barrel member 2, the ball held at the tip of the ball plunger 14 is attached to the barrel member 2. The inner peripheral surface of the core C placed on the outer periphery is elastically pressed to generate a frictional force between the ball and the inner peripheral surface of the core C, and the holding ring 8 rotates together with the core C by the frictional force. Thus, the sphere 6 waiting in the deep portion 5b of the inclined groove 5 helps to move to the shallow portion 5a of the inclined groove 5, so that the sphere 6 can be reliably retreated inside the outer peripheral surface of the body member 2. The winding core C can be fixed to.

  Further, in order to prevent the core C from moving in the axial direction even if the core ball lock device 4 stops fixing the core C between the start of winding and the completion of winding, As shown in FIG. 1, a known lateral displacement prevention ring 15 as described in, for example, Japanese Patent Application Laid-Open No. 11-301893 is disposed at a predetermined position adjacent to each body member 2. The lateral misalignment prevention ring 15 is engaged with the inner peripheral surface of the core C from the start of winding to the completion of winding to prevent the movement of the core C.

  At the time of winding the belt-like sheet, the winding shaft 1 with the winding core C fitted thereon can be rotated around the central axis while being supported at both ends at the winding position, and the winding shaft 1 can be attached to and detached from the winding shaft 1. In order to enable extraction from the winding position to the left in FIG. 1, the rear end of the central shaft 3 is held by a bearing cylinder 16 having a conical side surface at the front, and a hole for fitting and holding the bearing cylinder 16 is formed. In addition to being provided in the machine frame, a hole is provided at the tip of the central shaft 3, and a cone 17 that fits into this hole is provided at the tip of the main shaft 18. In order to transmit the rotation of the main shaft 18 to the central shaft 3, a claw 19 is provided around the cone 17, a claw 20 is provided at the tip of the central shaft, and when the cone 17 is fitted in the hole of the central shaft 3, The claws 20 are engaged with each other. In order to drive the winding shaft 1 rearward in the axial direction when the winding shaft 1 is extracted from the winding position, the bearing cylinder 16 is connected to a winding shaft extraction mechanism (not shown).

  The body member 2 is rotatably mounted on the central shaft 3 via a bearing 21 shown in FIG. As shown in FIG. 2, the central shaft 3 has a hollow inside, and is provided with a friction member 22 that can press the inner peripheral surface of the body member 2 for each body member 2 on the outer periphery thereof. In order to press the friction member 22 against the inner peripheral surface of the body member 2, the friction member 22 is inserted into a hole provided in the radial direction of the ring 23, and the ring 23 is engaged with the outer peripheral surface of the central shaft 3 and locked at a predetermined position. A hole is formed in the central shaft 2 so as to correspond to each hole of the ring 23, and a push-up rod 24 is inserted into the hole, and a tube 25 made of a resilient member such as rubber is provided inside the central shaft 3. The tube 25 can be supplied with compressed air through a rotary joint 26 provided at the rear end of the main shaft 18 shown in FIG. When compressed air is supplied to the tube 25, the tube 25 expands to push up the push-up rod 24. The push-up rod 24 further pushes up the friction member 22, and the friction member 22 and the body member 2 are frictionally engaged. Rotational force corresponding to the frictional force between the friction member 22 and the trunk member 2 is transmitted from the central shaft 3 to the trunk member 2.

  When the belt-like sheet is wound around the core C by the winding shaft 1, the winding shaft 1 is placed at the winding position as shown in FIG. 1 and supported through the winding core C. As shown in FIG. 2, the leading end of the belt-like sheet S is locked to the winding core C covering the outer periphery of the center 2, and the central shaft 3 is rotationally driven in the direction of the arrow A 1. Then, the body member 3 rotates in the same direction as the central axis 3, and at this time, the core C is constrained by the belt-like sheet S, so that the body member 2 rotates in the direction opposite to the direction of the arrow A 1. Due to the rotation of C, the sphere 6 in the deep portion 5b of the inclined groove 5 moves to the shallow portion 5a along the bottom surface 5c of the inclined groove 5 by the frictional force with the inner peripheral surface of the winding core C. A part protrudes from the window part 7, presses the inner peripheral surface of the core C, and the rotation of the core C relative to the body member 2 stops. Thereby, the core ball lock device 4 fixes the core C to the body member 2, and the core C rotates together with the body member 2 while pulling the belt-like sheet.

  When the belt-shaped sheet winding roll is completed around the core C attached to the winding shaft 1, the rotational driving of the central shaft 3 is stopped, and the winding shaft 1 is removed from the winding position.

  In the core ball lock device 4 of the present invention, the spherical body is rotated along with the rotation of the core by rotating the core C in the direction of the arrow A1 in FIG. 6 can be returned to the deep portion 5b of the inclined groove 5 and thereby the core C can be unfixed to the body member 2, but when the winding shaft 1 is removed from the winding position, the spherical body 6 Returning to the deep portion 5b, the fixing of the core C to the body member 2 is automatically released, so that an operator or the like may remove the core 1 from the winding roll before the core 1 is removed from the body member 2. It is not necessary to rotate.

  That is, when the winding shaft 1 is removed from the winding position, the sphere 6 is not sufficiently returned to the deep portion of the inclined groove 5, and a part of the sphere 6 protrudes from the window portion 7 of the holding ring 8. However, the spherical body 6 and the inner peripheral surface of the winding core C come into contact with each other, and a moving force in the width direction of the body member 2 is generated in the spherical body 6 due to the frictional force therebetween. Since the window portion 7 extends in the width direction of the body member 2 and the sphere 6 can move in the width direction on the bottom surface 5c of the inclined groove 5, the sphere 6 is a guide plate made of an elastic body. 10 is pushed in the winding core extraction side and the width direction of the body member 2. As a result, the guide plate 10 bends as shown in FIG. 10, and as it approaches the tip of the guide plate 10, the guide plate 10 tilts away from the side surface 5 d opposite to the guide plate 10 of the inclined groove 5, and the sphere 6 It moves on the bottom surface 5c from the center in the width direction to the housing groove 9 side. The moving force in the width direction of the body member 2 generated in the spherical body 6 is a pressing force in a direction perpendicular to the guide plate 10 at the contact point between the inclined guide plate 10 and the spherical body 6, and the leading end side along the guide plate 10. Therefore, the spherical body 6 escapes to the deep part 5 b of the inclined groove 5 by the moving force toward the tip side of the guide plate 10. As a result, the sphere 6 that has pressed the inner peripheral surface of the core C moves backward into the body member 2 to release the core C.

  Since the spherical body 6 does not receive the movement force in the width direction of the body member 2 when the winding core C is removed, the guide plate 10 bent by the elastic deformation returns to the original straight state as shown in FIG. The spherical body 10 is also pushed by the guide plate 10 and returns to the center in the width direction of the bottom surface 5 c of the inclined groove 5.

  In order to support the winding core C at the required position by the winding shaft 1, the winding core C is fitted on the outer periphery of the winding shaft 1 from its tip and moved to the required position. At this time, even if a moving force in the opposite direction to that at the time of extracting the core is generated in the sphere 6 due to the frictional force between the inner peripheral surface of the core C and the sphere 6, the sphere 6 is guided across the bottom surface 5 c of the inclined groove 5. Since the side surface 5d of the inclined groove 5 hits the side surface 5d on the side opposite to the plate 10 and extends at a right angle to the width direction of the body member 2, the moving force in the extending direction of the inclined groove 5 does not occur on the spherical body 6. The sphere 6 can be supported. Therefore, the winding core can be smoothly mounted on the winding shaft as usual.

  When the core C attached to a required position on the winding shaft 1 is fixed to the body member 2, when the core C is rotated in the fixing direction with respect to the body member 2, the spherical body 6 and the inclined groove facing the guide plate 10 are provided. 5 is guided at right angles to the width direction of the body member 2 by the side surface of 5 and moves to the shallow portion 5 a of the inclined groove 5. Therefore, the winding core can be accurately held at a required position on the winding shaft as in the prior art.

  In the present invention, as shown in FIG. 7, the guide plate 10 made of an elastic body is accommodated in the accommodating groove 9, and the leading end of the guide plate 10 can be bent in the width direction of the accommodating groove 9. Instead of fixing to the body member 2 on the rear end side of the plate 10, as shown in FIG. 11, a rigid guide plate 10 for partitioning the inclined groove 5 and the accommodating groove 9 is used, and the tip of the guide plate 10 is inclined. The guide plate 10 is accommodated in the accommodation groove 9 so as to face the deep portion 5 b side of the groove 5, and the rear end portion 10 d of the guide plate 10 is swung along the bottom surface of the accommodation groove 9. The guide plate 10 may be pivotally attached to the pin 27 provided on the bottom surface, and the guide plate 10 may be elastically pressed against the side surface 9a of the housing groove 9 on the inclined groove 5 side. In the case of the embodiment shown in FIG. 11, the elastic biasing means 28 is composed of a compression coil spring provided between the guide plate 10 and the side surface of the receiving groove 9 opposite to the inclined groove 5. When the winding core is pulled out, a moving force in the winding core pulling direction is generated in the spherical body 9 by the frictional force with the inner peripheral surface of the winding core, and the spherical body 6 pushes the guide plate 10 and the biasing force of the elastic biasing means 28. Against this, the body member 2 moves in the width direction as shown by a two-dot chain line in FIG. 11, and the guide plate 10 is tilted around the pin 27 as shown by a two-dot chain line.

  In the present invention, when the winding core is mounted on the winding shaft, the sphere is initially left in the shallow part of the inclined groove, and a part of the sphere protrudes from the outer peripheral surface of the body member. In order to make it possible to smoothly move the sphere to the required position on the winding axis, as shown in FIG. A guide plate 10 similar to that shown in FIG. That is, not only on the front end side of the winding shaft of the inclined groove 5 but also on the rear end side (left side in FIG. 12) of the inclined groove 5 on the opposite side, the width extends into the inclined groove 5 and extends along the inclined groove 5. A guide plate 10 made of an elastic body is formed in the body member 2 so as to partition the inclined groove 5 and the storage groove 9, and the leading end of the guide plate 10 is a deep portion of the inclined groove 5. The guide plate 10 is fixed to the body member 2 on the rear end side of the guide plate 10 so that the guide plate 10 can be bent in the width direction of the storage groove 9. The window portion 7 may be extended in the width direction of the body member 2 so that the spherical body 6 can move on the bottom surface 5c of the inclined groove 5 to the winding shaft rear end side. Thus, even when the sphere 6 remains in the shallow portion 5a of the inclined groove 5 when the winding core C is mounted on the winding shaft 1, the sphere 6 remains after the winding axis of the winding core C when the winding core is attached. Due to the movement in the end direction, the sphere 6 moves to the rear end side of the winding shaft and pushes the guide plate 10 on the rear end side of the winding shaft, the guide plate 10 bends, and the sphere 6 is inclined 5 It escapes to the deep part 5b of this, and it reverse | retreats to the inside of the trunk | drum member 2 so that the movement of the winding core C may not be prevented.

  According to the present invention, the guide plate is not limited to one made of spring steel, but may be made of another metal plate or the like as long as it has a function similar to that of the guide plate. It may be fixed by the fixing means. Further, the elastic biasing means for elastically pressing the rigid guide plate is not limited to the compression coil spring, and a plate spring or a torsion coil spring may be employed. The core ball lock device of the present invention can be applied to, for example, a winding shaft in which a body member is fixed to a central axis, a winding shaft in which a body member and a central axis are formed from one material, and the like.

It is a schematic front view of a winding axis provided with the core ball locking device concerning one example of the present invention. It is AA arrow sectional drawing in FIG. It is a front view which shows the upper half of the principal part of the winding axis | shaft shown in FIG. 1 in the cross section which follows a center axis line. It is a top view of a trunk member. It is a BB arrow sectional view in Drawing 4. It is DD sectional view taken on the line in FIG. It is a top view which abbreviate | omits a holding | maintenance ring and shows the waist | hip | lumbar part of a core ball locking device. It is a top view of the guide plate of the state which is not accommodated in an accommodation groove. It is a side view of a guide plate. It is a top view which omits a holding ring and shows a waist part of a core ball lock device at the time of winding core. It is a top view which abbreviate | omits a retaining ring and shows the principal part of the core ball | bowl lock device which concerns on the other Example of this invention. It is a front view which shows the upper half of the principal part of the core ball-locking apparatus which concerns on another Example of this invention in the cross section which follows a center axis line.

Explanation of symbols

C winding core 1 winding shaft 2 barrel member 3 central shaft 4 winding ball lock device 5 inclined groove 6 sphere 7 window portion 8 holding ring 9 receiving groove 10 guide plate 11 notch 12 hole 13 pin 14 ball plunger 15 lateral displacement prevention ring 16 Bearing cylinder 17 Cone 18 Main shaft 19 Claw 20 Claw 21 Bearing 22 Friction member 23 Ring 24 Push-up rod 25 Tube 26 Rotary joint 27 Pin 28 Elastic biasing means

Claims (4)

  A plurality of inclined grooves disposed on the body member of the winding shaft at intervals in the circumferential direction and having a bottom surface inclined so that a deep portion and a shallow portion can be formed in the circumferential direction, and each disposed in the inclined groove And a retaining ring that accommodates each sphere in a window provided for each sphere so that a part of the sphere can protrude from the window and that the sphere can roll on the bottom surface of the inclined groove and cannot fall off. In a core ball lock device for fixing a hollow core disposed on the drum member, which is fitted from the tip of the reel, to the drum member, a portion of the drum member on the tip side of the inclined groove of the drum member A guide plate made of an elastic body extending along the inclined groove and continuing in the width direction in the inclined groove and partitioning the inclined groove and the containing groove is provided at the tip of the guide plate. The guide plate is accommodated in the accommodation groove so as to face the deep portion side of the inclined groove. The window portion is fixed to the body member on the rear end side of the guide plate so that the front end side can be bent in the width direction of the receiving groove, and the sphere can move on the bottom side of the inclined groove to the front end side of the winding shaft. A core ball lock device, wherein the core member is extended in the width direction of the body member.   2. The core ball lock device according to claim 1, wherein an accommodating groove extending along the inclined groove and continuing in the width direction is formed in the inclined groove on a rear end side portion of the inclined groove of the body member. The guide plate made of an elastic body for partitioning the inclined groove and the accommodation groove is accommodated in the accommodation groove so that the front end of the guide plate faces the deep part of the inclined groove, and the guide plate The window is fixed to the body member on the rear end side of the guide plate so that the front end side can bend in the width direction of the receiving groove, and the sphere can move on the bottom surface of the inclined groove to the rear end side of the winding shaft A core ball lock device characterized in that the portion is extended in the width direction of the body member.   The guide plate is formed by bending a plate member into a hairpin shape, the bent rear portion of the guide plate is fitted to the rear end side of the receiving groove, the rear portion of the guide plate is attached to the trunk member, and the side surface of the receiving groove The core ball lock device according to claim 1, wherein the core ball lock device is fixed by being engaged with and restrained by a pin protruding from the pin. A guide plate made of an elastic body for partitioning the inclined groove and the accommodating groove is accommodated in the accommodating groove so that the leading end of the guiding plate faces a deep portion of the inclined groove, and the leading end side of the guiding plate is Instead of fixing to the body member on the rear end side of the guide plate so that it can be bent in the width direction of the storage groove, a guide plate for partitioning the inclined groove and the storage groove is provided at the front end of the guide plate. Is accommodated in the accommodation groove so as to face the deep part of the inclined groove, and the rear end of the guide plate is pivotally attached so that the guide plate can swing along the bottom surface of the accommodation groove, and the guide plate is The core ball lock device according to claim 1 or 2, wherein the core ball lock device is elastically pressed against a side surface of the housing groove on the inclined groove side by a resilient urging means.

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