JP4967859B2 - Bobbin holding structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bobbin holding structure having excellent durability and capable of attaching/detaching a bobbin for reliably and easily winding a long member to/from a bobbin holding machine. <P>SOLUTION: A coil spring 4 is externally inserted in a supporting shaft 3 projected from a bobbin holding machine 1. An engaging flange part 10 and a pressing flange part 11 are provided on an end on the bobbin holding machine 1 side of a bobbin holder 5. A stopper 2 to be engaged with the engaging flange part 10 is provided on the bobbin holding machine 1. A cutout 10a for passing the stopper in the axial direction of the supporting shaft 3 is formed in the engaging flange part 10, and after the stopper 2 is passed through the cutout 10a, the engaging flange part 10 is turned around the supporting shaft 3 to engage/disengage the engaging flange part 10 with/from the stopper 2. A blade 12 of the bobbin holder 5 is expanded/contracted by the urging force of the coil spring 4 to be expanded interlockingly with the engagement/disengagement, and the bobbin 17 is held/released, accordingly. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a bobbin holding structure in which a long member is wound, and more particularly to a bobbin holding structure that is excellent in durability and can be attached to and detached from a bobbin holding machine reliably and easily.

  When manufacturing rubber products, etc., various long members such as rubber members and reinforcing layers coated with rubber members are wound around the bobbin, and this bobbin can be rotated to the bobbin holding machine as necessary. The long member is held out and held. There are various structures for holding the rotating body. For example, unlike a bobbin, as a structure for holding a wheel cover on a disc wheel of an automobile, which is a rotating body, a latching projection provided on the wheel cover is pressed by a spring means to a notch provided on the disc wheel side. A holding structure to be removed is frequently used (for example, see Patent Document 1).

However, in the holding structure as proposed in Patent Document 1, when the locking projection and the notch are engaged and disengaged, the springs that urge the two to approach each other are always pressed against each other. Will slide. For this reason, the locking protrusion and the notch are likely to be worn, which is a disadvantageous structure for ensuring stable engagement / disengagement over a long period of time.
Japanese Utility Model Publication No. 6-71202

  An object of the present invention is to provide a bobbin holding structure that is excellent in durability and that allows a bobbin that winds a long member to be securely and easily attached to and detached from a bobbin holding machine.

  In order to achieve the above object, the bobbin holding structure of the present invention has a bobbin that is interposed between a support shaft protruding from the bobbin holding machine and a bobbin that is extrapolated to the support shaft. A bobbin holder that is rotatably held is provided, the bobbin holder is configured to be expandable and contractable in the radial direction of the bobbin, and the bobbin holder is pressed against the inner peripheral surface of the bobbin by increasing the diameter of the bobbin holder. A bobbin holding structure that releases the bobbin holding by inserting a coil spring that urges the bobbin holder in a direction away from the bobbin holding machine to the support shaft, and engages with the bobbin holding machine side end of the bobbin holder. A mating flange portion and a pressing flange portion capable of abutting on an axial end portion of the bobbin to be extrapolated are provided so as to protrude outward from the coil spring, and are engaged with the engaging flange portion. A stopper is provided on the bobbin holding machine, and a notch is formed in the engaging flange portion so as to pass the stopper in the axial direction of the support shaft, and the engaging flange portion moved to the bobbin holding machine side from the stopper is a coil spring. The urging force causes the stopper to be brought into pressure contact with the stopper, and the bobbin holder is set at a reduced diameter position so that the bobbin can be freely inserted into the bobbin holder, and the engagement flange is moved to the tip end side of the support shaft rather than the stopper. Thus, when the coil spring is extended by releasing the mutual engagement, the bobbin holder is configured to expand its diameter by the urging force of the coil spring.

  Here, the bobbin holder is fitted into a taper ring having the engagement flange portion and the press flange portion, and a taper groove formed in the taper ring, and is arranged at a predetermined circumferential pitch on the outer peripheral side of the support shaft. The plurality of blades extend in the radial direction of the bobbin along the taper groove of the taper ring, which is configured by a plurality of blades extending in the support shaft axis direction and moves in the support shaft axis direction by the biasing force of the coil spring. It can also be configured to move. Further, a plurality of the notches can be provided at positions facing each other.

  According to the bobbin holding structure of the present invention, a bobbin holder that can be expanded and contracted in the radial direction of the bobbin is interposed between the support shaft protruding from the bobbin holding machine and the bobbin extrapolated to the support shaft. A bobbin is rotatably held around the shaft, and a coil spring for energizing the bobbin holder in a direction away from the bobbin holder is extrapolated to the support shaft, and an engagement flange portion and an outer portion are disposed at the bobbin holder side end of the bobbin holder. A pressing flange portion that can be in contact with the axial end portion of the bobbin to be inserted is provided so as to protrude outward from the coil spring, a stopper that engages with the engaging flange portion is provided on the bobbin holding machine, and the engaging flange Since the notch that allows the stopper to pass in the direction of the support shaft is formed in the part, the engagement flange is rotated around the support shaft after the stopper is passed through the notch, so that the engagement flange And without sliding while being strongly pressed against the stopper, the engagement flange portion is moved to the bobbin holding unit side than the stopper can be engaged by pressure contact with the stopper by the urging force of the coil spring. Thereby, it becomes possible to improve durability by suppressing wear of the engaging flange portion and the stopper.

  In addition, the engaging flange portion and the stopper are engaged, and the bobbin holder is set at a reduced diameter position so that the bobbin can be externally inserted into the bobbin holder, and the engaging flange portion is moved further to the distal end side of the support shaft than the stopper. When the coil spring is extended by releasing the mutual engagement, the diameter of the bobbin holder is expanded by the urging force of the coil spring, so that the engagement flange portion and the stopper portion are engaged and disengaged, and the bobbin by the bobbin holder The holding and releasing are performed in conjunction with each other, and the bobbin can be reliably and easily attached to and detached from the bobbin holding machine without performing a complicated operation.

  The bobbin holding structure of the present invention will be described below based on the embodiments shown in the drawings.

  As illustrated in FIGS. 1 and 2, the bobbin holding machine 1 supported by the column 1 a has a support shaft 3 protruding in a cantilever manner in the horizontal direction, and in the same direction as the support shaft 3. A stopper 2 is fixed by extending the tip of the extended arm downward.

  A bobbin holder 5 is extrapolated to the support shaft 3, and a bobbin 17 is extrapolated to the bobbin holder 5. In this way, the bobbin holder 5 interposed between the support shaft 3 and the bobbin 17 holds and releases the bobbin 17.

  A taper ring 6 is provided at an end of the bobbin holder 5 on the bobbin holding machine 1 side. The support shaft 3 is inserted through the through hole 7 of the taper ring 6, and the taper ring 6 is movable in the axial direction of the support shaft 3. Further, a holding sleeve 13 is provided on the tip side of the taper ring 6 in the axial direction of the support shaft 3. The support shaft 3 is inserted through the through hole 14 of the holding sleeve 13, and the holding sleeve 13 is movable in the axial direction of the support shaft 3. A plurality of holding grooves 15 are formed at a predetermined pitch in the circumferential direction on the surface of the holding sleeve 13.

  The taper ring 6 has, in order from the bobbin holding machine 1 side, an engagement flange portion 10, a pressing flange portion 11, and a taper portion 9. The engagement flange portion 10 and the pressing flange portion 11 are the flange portion 10. , 11 are connected by a cylindrical portion 8 having a smaller diameter than that. On the inner peripheral side of the engagement flange portion 10 and the cylindrical portion 8, a coil spring 4 that is extrapolated to the support shaft 3 is disposed. As illustrated in FIG. 5, the disc-shaped engagement flange portion 10 is formed with two notches 10 a obtained by cutting a circular outer shape in a straight line at opposing positions.

  The tapered portion 9 has a truncated cone shape with a diameter reduced from the bobbin holding machine 1 side toward the distal end side in the axial direction of the support shaft 3, and a plurality of tapered grooves 9 a along the tapered surface are predetermined on the surface thereof in the circumferential direction. It is provided with the pitch. A blade 12 extending in the axial direction of the support shaft 3 is movably fitted in each tapered groove 9a and the holding groove 15 of the holding sleeve 13 corresponding to each tapered groove 9a. As a result, the plurality of blades 12 are arranged at a predetermined pitch in the circumferential direction on the outer peripheral side of the support shaft 3. A plurality of rubber rings 16 are fitted on the outer periphery of the support shaft 3 so as to cross the outer periphery of the plurality of blades 12 arranged on the outer periphery of the support shaft 3. It is bundled.

  The tip of the blade 12 is formed in a tapered shape along the tapered groove 9a. When the taper ring 6 moves in the axial direction of the support shaft 3, each blade 12 moves along the taper groove 9 a along with this movement, and expands and contracts in the radial direction of the bobbin 17.

  As illustrated in FIGS. 1 and 2, when the engagement flange portion 10 of the taper ring 6 and the stopper 2 of the bobbin holding machine 1 are engaged, the engagement flange portion is applied by the biasing force of the coil spring 4. 10 and the stopper 2 are brought into pressure contact with each other to be in a fixed state. In this case, the coil spring 4 is maintained in a contracted state, and the taper ring 6 is not moved in the axial direction of the support shaft 3 by the coil spring 4. Therefore, each blade 12 set at a reduced diameter position does not come into pressure contact with the inner peripheral surface of the bobbin 12, so that the bobbin 17 can be freely extrapolated to the bobbin holder 5.

  When a new bobbin 17 is mounted on the bobbin holder 1, the bobbin 17 is extrapolated to the bobbin holder 5 (support shaft 3) as illustrated in FIGS. Next, as illustrated in FIG. 3, the end of the bobbin 17 that is extrapolated to the bobbin holder 5 is brought into contact with the pressing flange 11 provided on the taper ring 6 so as to be close to the bobbin holder 1. Move in the axial direction of the shaft 3. In this way, the taper ring 6 is moved together with the bobbin 17 against the urging force of the coil spring 4 to separate the engagement flange portion 10 and the stopper 2.

  Here, the engagement flange portion 10 and the stopper 2 are engaged in an overlapped state as illustrated in FIG. Therefore, by rotating the bobbin 17 around the support shaft 3, the taper ring 6 is rotated together. And the notch 10a formed in the engagement flange part 10 so that it may illustrate in FIG. At this time, the taper ring 6 can be rotated in a state in which the stopper 2 and the engagement flange portion 10 are separated from each other so as not to contact each other, so that the stopper 2 and the engagement flange portion 10 are slid. Wear can be prevented.

  Next, as illustrated in FIG. 4, the engagement flange portion 10 is moved to the tip side of the support shaft 3 rather than the stopper 2 by passing the stopper 2 through the notch 10 a. As a result, the engagement between the engagement flange portion 10 and the stopper 2 is released, and the taper ring 6 is pressed by the urging force of the extending coil spring 4 to move toward the distal end side of the support shaft 3.

  As the taper ring 6 moves toward the tip of the support shaft 3, each blade 12 moves along the taper groove 9 a so as to expand in the radial direction of the bobbin 17. As a result, the blade 12 and the rubber ring 16 fitted to the blade 12 are pressed against the inner peripheral surface of the bobbin 17, and the bobbin 17 is held by the bobbin holder 5. In this manner, the bobbin 17 is rotatably supported on the support shaft 3 of the bobbin holding machine 1.

  When the bobbin 17 pivotally supported on the support shaft of the bobbin holding machine 1 is removed, a procedure opposite to the procedure for mounting the bobbin 17 illustrated in FIGS. 2 to 6 is performed. That is, the bobbin 17 held by the bobbin holder 5 of FIG. 4 is moved to the bobbin holder 1 side together with the taper ring 6 against the urging force of the coil spring 4 to obtain the state illustrated in FIG. At this time, as illustrated in FIG. 6, the stopper 2 is passed through the notch 10 a, and the engagement flange portion 10 is moved to the bobbin holding machine 1 side from the stopper 2. Thereafter, as shown in FIG. 5, the bobbin 17 is rotated around the support shaft 3 to rotate the taper ring 6 together so that the engagement flange portion 10 and the stopper 2 are overlapped with each other. Let At this time, the taper ring 6 can be rotated in a state in which the stopper 2 and the engagement flange portion 10 are separated from each other so as not to contact each other, so that the stopper 2 and the engagement flange portion 10 are slid. Wear can be prevented.

  When the taper ring 6 is moved in the axial direction of the support shaft 3 against the urging force of the coil spring 4, each blade 12 moves along the taper groove 9 a so as to reduce the diameter in the radial direction of the bobbin 17. As a result, the blade 12 and the rubber ring 16 that are in pressure contact with the inner peripheral surface of the bobbin 17 are separated from the inner peripheral surface of the bobbin 17, so that the bobbin 17 is released from the holding of the bobbin holder 5. On the other hand, the engagement flange portion 10 and the stopper 2 are brought into a fixed state by being pressed against each other by the urging force of the coil spring 4 as illustrated in FIG. In this way, the holding of the bobbin 17 is released, and the bobbin 17 that is no longer needed can be removed from the support shaft 2 (bobbin holder 5).

  As described above, in the present invention, the engagement and disengagement between the stopper 2 and the engagement flange portion 10 is performed by passing the stopper 2 through the notch 10a formed in the engagement flange portion 10 and supporting the engagement flange portion 10. The combination with the operation of rotating around the shaft 3 can be performed reliably and easily. In addition, when the stopper 2 and the engagement flange portion 10 are engaged and disengaged, wear can be suppressed without sliding each other, so that the structure is excellent in durability. Furthermore, since the engagement and disengagement of the stopper 2 and the engagement flange portion 10 and the holding and releasing of the bobbin 17 by the bobbin holder 5 are performed in conjunction with each other, the bobbin 17 can be reliably and easily performed without complicated operations. The bobbin holder 1 can be attached and detached.

  The notch 10a formed in the engagement flange portion 10 may be any as long as it allows the stopper 2 to pass therethrough. For example, as illustrated in FIG. Further, the number of the notches 10 a can be the same as the number of the stoppers 2 or more than the stoppers 2. When the number of the notches 10a is larger than that of the stopper 2, the rotation angle for rotating the taper ring 6 may be small when the engagement flange portion 10 and the stopper 2 are engaged and disengaged. Considering the rotation angle and the strength of the engaging flange portion 10, when providing a plurality of notches 10 a, it is preferable to provide the notch 10 a at a position facing each other.

It is a side view which illustrates the holding structure of the bobbin of this invention. It is sectional drawing of FIG. It is sectional drawing at the time of mounting | wearing the bobbin of FIG. 1 with a bobbin holding machine. It is sectional drawing at the time of mounting | wearing the bobbin holding machine of the bobbin of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is BB sectional drawing of FIG. 4 which shows the modification of an engagement flange part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bobbin holding machine 1a Support | pillar 2 Stopper 3 Support shaft 4 Coil spring 5 Bobbin holder 6 Tapered ring 7 Through hole 8 Tubular part 9 Tapered part 9a Tapered groove 10 Engagement flange part 10a Notch 11 Press flange part 12 Blade 13 Holding sleeve 14 Through Hole 15 Holding groove 16 Rubber ring 17 Bobbin

Claims (3)

  A bobbin holder is provided between the support shaft projecting from the bobbin holding machine and the bobbin extrapolated to the support shaft so as to hold the bobbin rotatably about the support shaft. The bobbin holding structure is configured such that the bobbin holder is pressed against the inner peripheral surface of the bobbin by expanding the diameter of the bobbin holder, and the bobbin holder is released by reducing the diameter of the bobbin holder. Then, a coil spring that urges the bobbin holder away from the bobbin holder is extrapolated to the support shaft, an engagement flange portion is provided at the bobbin holder side end portion of the bobbin holder, and an axial end portion of the bobbin to be extrapolated. A pressing flange portion capable of abutting and provided on the outer peripheral side of the coil spring, a stopper that engages with the engaging flange portion is provided on the bobbin holding machine, and A notch for allowing the stopper to pass in the direction of the support shaft is formed in the mating flange, and the engaging flange moved to the bobbin holding machine side than the stopper is brought into pressure contact with the stopper by the biasing force of the coil spring and engaged. At the same time, the bobbin holder is set to a reduced diameter position so that the bobbin can be freely inserted into the bobbin holder, and the engagement flange portion is moved to the distal end side of the support shaft rather than the stopper to release the mutual engagement and to release the coil spring. A bobbin holding structure configured to expand the diameter of the bobbin holder by an urging force of the coil spring when the coil spring is extended.   The bobbin holder is disposed at a predetermined circumferential pitch on the outer peripheral side of the support shaft by fitting into a tapered ring having the engaging flange portion and the pressing flange portion, and a tapered groove formed in the tapered ring. The plurality of blades extend and contract in the radial direction of the bobbin along a taper groove of the tapering that is configured by a plurality of blades extending in the support shaft axis direction and moves in the support shaft axis direction by the biasing force of the coil spring. The bobbin holding structure according to claim 1.   The bobbin holding structure according to claim 1 or 2, wherein a plurality of the notches are provided at positions facing each other.

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