JP3989418B2 - Metal thin drum holding device - Google Patents

Description

  The present invention relates to a holding device for holding a drum when a drum formed by forming a thin metal plate into a cylindrical shape is cut into a circular shape.

Conventionally, when a thin metal drum is cut into a circular shape, as an apparatus for holding the drum, for example, a cylindrical body is provided with tapered holes at both ends of a central portion of a segment that is divided into three parts in a circumferential direction, and a taper on one side is provided. The taper part of the main shaft is fitted into the hole, the taper part of the pressing member is fitted into the other side taper hole, and the flat is retracted from the taper hole by retracting the pressing member, and the segment is contracted, An apparatus is known in which after a drum is mounted around a segment, a pressing member is advanced to the main shaft side to press the tapered hole of the segment from both sides, and the segment is expanded to hold the drum inner peripheral surface. (For example, see Patent Document 1 and Patent Document 2.)
And when taking out the cut | disconnected workpiece | work, a press member is retracted, a segment is shrunk | removed, and the restriction | limiting of the internal peripheral surface of a workpiece | work is taken out and taken out.
Japanese Utility Model Publication No. 62-72017 Japanese Utility Model Publication No. 1-87822

  However, in the method as described above, the expansion margin when pressed by the pressing member and the shrinkage margin when the pressing member is released are small, so that when the thin metal drum is gripped or attached / detached, There is a problem that it is difficult to attach and detach to and from the machine and takes time, and the work efficiency is not good.

  Therefore, an object of the present invention is to make it easy to attach and detach the drum so that it does not take time in a holding device that holds the drum when the metal thin drum is cut into a ring shape.

  In order to achieve the above object, according to the present invention, when a metal ring is formed by cutting a metal thin plate into a cylindrical shape to form a metal ring, the drum is held in pressure contact with the inner peripheral surface of the drum. In the holding device, a first taper member and a second taper member are provided in a form in which a cylindrical member into which a rotationally driven support shaft can be inserted is cut into a taper shape in the axial direction and divided into two, and the first taper member is provided. The taper member and the second taper member can be moved relative to each other in the axial direction so that the respective taper surfaces come into contact with or be separated from each other. 1. The first and second ring-shaped members that can be engaged with the other end of the tapered end are provided at the base end of the second taper member.

  The first taper member and the second taper member are provided in a form in which the cylindrical member is cut into a taper shape in the axial direction and divided into two parts, and the first taper member and the second taper member can be moved relative to each other in the axial direction. If the outer diameter of the combined body matches the inner diameter of the drum in a state where the respective taper surfaces are overlapped and combined, the first taper member and the second taper member are moved away from each other. Since the diameter of the body shrinks and the margin for shrinkage can be made larger than before, the drum can be attached and detached easily.

  In the present invention, the ring-shaped member is provided with a clamp mechanism that automatically clamps the drum when the mating tapered tip is engaged when the first and second tapered members are combined. .

  If the ring-shaped member is provided with the clamp mechanism as described above, the drum can be clamped only by combining the first and second tapered members, and the working efficiency is improved. In addition, such a clamp mechanism is good also as an auxiliary clamp mechanism which clamps a drum auxiliary.

  Further, as an example of such a clamping mechanism, for example, when engaged with the other end of the tapered tip, the steel ball protrudes outward in the radial direction. A mechanism that presses the peripheral edge of the drum can be adopted.

  A first taper member and a second taper member are provided that are divided into two by cutting the cylindrical member into a taper shape in the axial direction, and the first taper member and the second taper member can be moved relative to each other in the axial direction. If this is done, the expansion and contraction of the holding device will increase, making it easy to attach and detach the drum and shortening the working time.

  If a ring mechanism is provided with a clamp mechanism, the drum can be clamped only by combining the first and second taper members, and the working efficiency is further improved.

  Embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is an explanatory view of the entire apparatus for cutting the drum, FIG. 2 is a perspective view of the holding device, FIGS. 3 to 5 are operational views of the holding device, and FIG. 6 is an explanatory view of the clamping mechanism.

  The metal thin plate drum holding device according to the present invention is, for example, for producing a power transmission belt employed in a continuously variable transmission, when the cylindrical thin plate drum is cut into a circular shape with a predetermined width. It is constructed as an improvement of the holding device, so that the drum can be easily attached and detached, and the working time can be shortened.

  That is, in the drum cutting apparatus as shown in FIG. 1, the main holding device 1 can be mounted on the support shaft S that is rotationally driven by the lathe spindle, and the main device 1 that holds the inner peripheral surface of the drum W is the support shaft. When inserted into S, it is fixed to the support shaft S by the nut N, and then the disc-shaped cutting edge k of the cutting device P is brought into contact with the support shaft S while rotating so that it is cut into a ring shape.

  As shown in FIGS. 2 and 3, the holding device 1 includes first and second assembly bodies 2 a and 2 b that are substantially symmetrical, and the assembly bodies 2 a and 2 b are made of synthetic resin or the like. The first and second taper members 3a and 3b, which are formed by cutting the cylindrical member in a taper shape in the axial direction, are combined with the ring-shaped first and second ring members 4a and 4b made of synthetic resin or the like. It is a thing. The first taper member 3a is formed with a first taper surface 5a, and the twelfth super member 3b is formed with a second taper surface 5b.

  Hereinafter, for the sake of simplicity, the first assembly 2a will be described as a representative example.

  In the first taper member 3a, the outer peripheral surface on the base end side (large diameter side) and the outer peripheral surface on the tapered distal end side (small diameter side) are tapered taper portions t. Circumferential grooves m are provided at regular intervals at locations corresponding to the cutting edge k of the device P. And this structure is the same also in the case of the 2nd taper member 3b.

  The first ring member 4a is fixed to the inner peripheral portion on the base end side (large diameter side) of the first taper member 3a with three fixing screws 6 in the circumferential direction. A taper receiving portion q is formed corresponding to the taper portion t of the taper members 3a and 3b.

  Further, a gripping groove h is formed on the outer peripheral portion of the first ring member 4a. When releasing both assembled bodies 2a and 2b from the combined state, the gripping groove h can be gripped and pulled out. I am doing so.

  And these structures are the same also in the case of the 2nd ring member 4b.

  A lever-type clamp mechanism 7 is provided at a predetermined position of the first ring member 4a as an auxiliary clamp mechanism for clamping the drum W.

  As shown in FIG. 6A, the lever-type clamp mechanism 7 includes a steel ball 8 embedded in the first ring member 4a and partially protruding from the taper receiving portion q, and the steel ball 8 And an adjustment screw 10 that is screwed into the oscillation piece 9 in the radial direction, and a lower end portion of the adjustment screw 10 slightly contacts the steel ball 8 or The position is adjusted so as to be close to each other.

  When the first assembly 2a and the second assembly 2b are combined, as shown in FIG. 6 (b), the taper receiving portion q of the first ring member 4b is connected to the taper portion t of the second taper member 3b. Enters the steel ball 8 and presses the adjusting screw 10 outward, elastically deforms the base end of the swing piece 9 to swing the tip end of the swing piece 9 downward, and the drum W A part of the press can be clamped.

  The operation and the like of the holding device 1 as described above will be described with reference to FIGS.

  As shown in FIG. 3 (a), the first assembly 2a and the second assembly 2b are moved away from each other along the axial direction, and the drum W is positioned at an intermediate portion therebetween. Then, by advancing each assembly 2a, 2b, the tapered tip of each assembly 2a, 2b is inserted into the drum W. At this time, as shown in FIG. Can be inserted into the drum W easily even when the assembled body 2a, 2b is deformed somewhat flat.

  Then, as shown in FIG. 4, the first and second taper surfaces 5a and 5b of the first and second taper members 3a and 3b are brought into contact with each other by moving the assembled bodies 2a and 2b forward and approaching each other. As shown in FIG. 5, the tapered portion t on the tapered tip side of each tapered member 3a, 3b enters the tapered receiving portion q of the mating ring member 4b, 4a. As a result, the outer surfaces of the assembled bodies 2a and 2b hold the inner peripheral surface of the drum W.

  At this time, the steel ball 8 of the clamp mechanism 7 of the first ring member 4a is pushed upward by the taper portion t of the second taper member 3b and accordingly the adjustment screw 10 is also pushed upward. The tip of the swing piece 9 swings downward and presses a part of the drum W to fulfill the function of an auxiliary clamp.

  As shown in FIG. 1, the holding device 1 for holding the drum W is mounted on the spindle S of the lathe spindle, fixed to the spindle S with a nut N, and then held by rotational driving of the spindle. The device 1 and the drum W rotate around the axis. Then, the cutting device P approaches and is cut into a ring shape by the cutting blade k.

  When the cutting process is completed, the combination of both is released by engaging the gripping part of the unillustrated removal mechanism with the gripping groove h of each assembly 2a, 2b and pulling the second assembly 2b in the disengagement direction. In addition, since the diameter of the combination contracts, the workpiece can be easily taken out.

  The operation of detaching the drum W can be easily performed by the operation as described above.

  The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.

  When cutting a thin metal drum into a circular shape, the inner peripheral surface of the drum is held, so that the outer diameter can be expanded and contracted, and the expansion and contraction margins are increased, making it easy to attach and detach the drum. As a result, work efficiency can be improved.

Explanatory drawing of the entire device for cutting the drum Perspective view of the holding device In each state where each assembly is moved away, (a) is a longitudinal sectional view and (b) is a front view. In the state diagram in which each assembly is moving toward the assembled state, (a) is a longitudinal sectional view and (b) is a front view. In each state where each assembly is in a combined state, (a) is a longitudinal sectional view and (b) is a front view. Explanatory drawing of clamp mechanism

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Holding device, 2a ... 1st assembly body, 2b ... 2nd assembly body, 3a ... 1st taper member, 3b ... 2nd taper member, 4a ... 1st ring member, 4b ... 2nd ring member, 5a ... 1st taper surface, 5b ... 2nd taper surface, 7 ... Lever type clamp mechanism.

Claims (2)

A holding device that holds a drum in pressure contact with the inner peripheral surface of the drum when a metal ring is formed by cutting a metal thin plate into a cylindrical shape to form a metal ring. A first taper member and a second taper member are provided in a form in which a cylindrical member into which a support shaft can be inserted is cut into a taper shape in the axial direction and divided into two, and the first taper member and the second taper member are provided. Can be moved relative to each other in the axial direction so that the taper surfaces can be brought into contact with or separated from each other, and when the taper surfaces are brought into contact with each other to be combined, it becomes a cylindrical shape. A metal thin plate drum holding device, wherein the end portion is provided with first and second ring-shaped members with which the other end of the taper can be engaged. The ring-shaped member is provided with a clamp mechanism that automatically clamps the drum when a mating tapered tip is engaged when the first and second tapered members are combined. The metal thin plate drum holding device according to 1.