JPH07178452A - Chucking method of steel sheet coil - Google Patents

Abstract

PURPOSE:To hold a steel sheet coil without generating edge wrinkle. CONSTITUTION:An annular chucking member 4 is provided on the outer circumference of a chuck main body 3. The chucking member 4 is constituted of plural circular arc split pieces, 30 each split piece 30 has a flange part 31 of the diameter larger than the inner diameter of a steel coil and a fitting face 32 parallel to the inner diameter part of the steel coil, also, each split piece 30 is engaged to the outer face of the chuck main body 3 free to slide through a groove 11 and rail, further, between the chuck main body 3 and each split piece (slider 18), the spring 24 to energize the split piece in closing direction is inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck device for rotatably supporting a steel plate coil wound in a cylindrical shape.

[0002]

2. Description of the Related Art As a steel plate used as a material for press working, a strip-shaped steel plate is wound into a cylindrical shape to form a steel plate coil, and a necessary amount of the steel plate coil is pulled out for use. At this time, the steel sheet coil rotatably holds both ends of the inner diameter portion by a pair of conical taper cones facing each other.

However, if the inner diameter of the steel sheet coil is held by a conical taper cone, the edge portion of the steel sheet is stretched by the taper cone at several winding portions from the innermost winding portion of the steel sheet coil, and when it is pulled out, Wrinkles occur,
The part where the ear wrinkles were generated was discarded, and waste was conspicuous.

In order to solve this problem, Jitsuko Sho 61-38
A chuck device disclosed in Japanese Patent No. 727 is known. In this chuck device, an annular chuck member is slidably fitted on the tapered surface of a conical taper cone, the chuck member is divided into a plurality of arcuate claws, and the chuck member is fitted in parallel with the inner diameter surface of the steel plate coil. A mating surface is provided, and adjacent split claws are connected by a tension spring to urge the split claws in the diameter reducing direction.

An apparatus disclosed in Japanese Patent Laid-Open No. 2-300050 is also known. In this device, a wedge member is slidably engaged with the outer peripheral surface of a pipe-shaped support body longer than the width of a steel plate coil, and a split drum piece is further engaged with the wedge member to connect the wedge member to the pipe-shaped support body. By sliding the divided drum pieces in the axial direction, the diameters of the plurality of divided drum pieces can be expanded or reduced.

[0006]

[Problems to be Solved by the Invention] Jitsuko Sho 61-3872
According to the chuck device disclosed in Japanese Patent Publication No. 7, the fitting surface parallel to the inner diameter surface of the steel plate coil provided on the split claw hits the steel plate coil, so that the occurrence of ear wrinkles can be prevented.

However, in the chuck device disclosed in Japanese Utility Model Publication No. 61-38727, the taper cone and the annular chuck member are merely in contact with each other, and the annular chuck member has a plurality of split claws constituting the chuck member. Are connected to each other by a tension spring so that they can be fitted into the taper cone. Since the plurality of arcuate split claws are supported by the springs in this manner, the lower arcuate claws may hang down or be eccentric.
Since only a tension spring can be used, there is also a problem of spring expansion due to multiple uses, and the radius of curvature of the outer peripheral tapered surface of the taper cone is smaller at the tip portion and larger at the rear end portion, so When the chuck member slides in the axial direction, the outer peripheral taper surface of the taper cone and the inner diameter taper surface of the chuck member do not become completely parallel to each other but come into contact close to point contact, and it is possible that the chuck member does not slide smoothly.

Further, since the chuck device disclosed in Japanese Patent Laid-Open No. 2-300050 is a cantilever type, it is necessary to make the entire device extremely rigid, and
Mechanically, it requires a wedge member and a hydraulic device for moving the wedge member, which is large, and it is not enough to slightly change the existing chuck device.

Further, the shape of the inner surface of the divided piece of the chuck device disclosed in Japanese Utility Model Publication No. 61-38727 must correspond to a conical taper cone.
The shape of the inner surface of the divided drum piece of the chuck device disclosed in Japanese Patent No. 300050 must correspond to that of the pipe-shaped support and the wedge member, which is disadvantageous in terms of manufacturing.

[0010]

In order to solve the above-mentioned problems, a chuck device for a steel plate coil according to the present invention comprises a pair of chuck devices that can relatively move toward and away from each other, and each chuck device includes a rotary shaft, The rotary shaft is provided with a pyramid-shaped chuck body having a plurality of inclined guide surfaces that converge toward opposite tips, and a chuck member is provided on the outer side of the chuck body. Each of the divided pieces has a flange portion having a diameter larger than the inner diameter of the steel plate coil and a fitting surface parallel to the inner diameter portion of the steel plate coil, and each divided piece is an inclined guide surface of the chuck body. A spring that is slidably engaged in the axial direction and that urges the divided pieces in the closing direction is provided between the chuck body and each divided piece.

[0011]

Function: The chuck device is moved from the outside toward both ends of the inner diameter portion of the steel sheet coil. Then, the side surface of the steel plate coil abuts the flange portion of the arc-shaped divided piece that constitutes the annular chuck member, and each divided piece slides in the radial direction along the inclined guide surface of the chuck body against the spring. The fitting surface of the divided piece fits into the inner diameter portion of the steel plate coil.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view of a steel plate coil chuck device according to the present invention.
1 is provided. These columns 1 and 1 can be relatively moved toward or away from each other in the arrow direction (horizontal direction), and each column 1 is provided with a rotary shaft 2 on which the chuck main body 3 is attached.
Is attached so as to rotate integrally, an annular chuck member 4 is provided on the outer peripheral portion of the chuck body 3, and a steel plate coil 5 formed by winding a strip steel plate into a cylindrical shape is held by the annular chuck member 4. There is.

Next, the chuck body 3, the annular chuck member 4, and the members associated with them, which constitute the chuck device, will be described with reference to FIGS. 2 is a vertical cross-sectional view of a main part of the chuck device, FIG. 3 is a view taken in the direction of arrow A in FIG. 2, FIG. 4 is a front view of the chuck body, and FIG. 5 is BB of FIG.
6 is a view showing the engaged state of the rail and the slide member, FIG. 7 is a view of the slide member from below, FIG. 8 is a cross-sectional view taken along the line CC of FIG. 6, and FIG. FIG. 11 is a front view of a divided piece that constitutes the chuck member, FIG. 10 is a side view of the divided piece, and FIG.
Is a front view of the rear stopper, and FIG. 12 is a cross-sectional view taken along the line D-D of FIG. 11.

As shown in FIG. 2, the chuck body 3 is fixed to the rotary shaft 2 via a key 10. Further, as shown in FIG. 4, the chuck body 3 has a quadrangular shape in a front view and has a pyramid shape having four inclined surfaces whose diameter is reduced toward the tip. A wide groove 11 is formed on each inclined surface,
A front stopper 12 is attached to the further reduced front end portion, and a rear stopper 13 is attached to the enlarged rear end portion.

The rear stopper 13 is composed of a plurality of circular arc-shaped members 14 which are formed into an annular shape by being combined as shown in FIGS. 11 and 12. Each circular arc-shaped member 14 has a mounting hole 15 and a mounting hole 15 for the chuck body 3. An insertion hole 16 for a guide rod of a spring, which will be described later, is formed.

The groove 11 is formed along the axial direction of the chuck body 3, and rails 17, 17 are attached along both sides of the groove 11 as shown in FIG. 6, and slide between the rails 17, 17. The member 18 is slidably arranged. As shown in FIGS. 7 and 8, the slide member 18 has a U-shape that is open toward the chuck body 3, and the left and right leg portions 19 engage with the rail 17, and the upper surface of the leg portion 19 is formed. A solid lubricant 20 is interposed between the side surface and the rail 17, and between the lower surface of the leg 19 and the upper surface of the groove 11 to reduce the friction coefficient and ensure smooth sliding.

A wall portion 21 is provided at the center of the slide member 18, and a hole 22 is formed in the wall portion 21,
As shown in FIG. 2, a spring guide rod 23, which is attached to the rear stopper 13 in a positionally adjustable manner, is inserted into the hole 22 and compressed between a step portion formed in an intermediate portion of the rod 23 and the wall portion 21. A spring 24 is interposed to urge the slide member 18 toward the tip of the chuck body 3.

On the other hand, the annular chuck member 4 is composed of four divided pieces 30 ... Which are joined together to form an annular shape. As shown in FIGS. 9 and 10, each divided piece 30 has a flange portion 31 having a diameter larger than the inner diameter of the steel sheet coil 5 and a fitting surface 32 parallel to the inner diameter portion of the steel sheet coil 5. Each divided piece 30 is attached to the slider 18. Therefore, each divided piece 30 is indirectly urged by the compression spring 24 in the closing direction at all times.

Then, in FIG. 1, the pair of chucking devices arranged so as to face each other is retracted, the steel plate coil 5 is positioned between the chucking devices in this state, and then the pair of chucking devices is advanced. The chuck bodies 3 are inserted into the inner diameter of the steel plate coil 5 from the outside. Then, the side surface of the steel plate coil 5 abuts on the flange portion of the arc-shaped divided piece 30 that constitutes the annular chuck member 4, and each divided piece 30 resists the spring 24 and extends along the chuck body 3 in the radial direction (rearward direction). ), And the fitting surface of the split piece 30 is the steel plate coil 5
It fits into the inner diameter of the steel plate coil and holds the steel plate coil 5 rotatably.

In the illustrated example, the slider member 18 having the split piece 30 attached to the rail 17 is engaged to prevent the split piece 30 from coming off from the chuck body 3. A T groove may be formed on the surface.

[0021]

As described above, according to the steel plate coil chuck device of the present invention, an annular chuck member composed of a plurality of arcuate divided pieces is provided on the outer periphery of the chuck body, and each divided piece is provided. Since the fitting surface parallel to the inner diameter portion of the steel plate coil is provided and the inner diameter portion of the steel plate coil is held in surface contact with this fitting surface, occurrence of ear wrinkles on the inner peripheral portion of the steel plate coil is prevented. be able to.

Further, according to the present invention, since the shape of the chuck body is pyramidal, a stable clamping force can be obtained and smooth sliding is possible without complicating the shape of the arc-shaped divided pieces. In addition, it is cost-effective without significantly changing the existing chuck device. Further, by providing a solid lubricant on the guide surface, the lubricant or the like does not scatter, and smooth operation can be obtained.

[Brief description of drawings]

FIG. 1 is an overall view of a steel plate coil chuck device according to the present invention.

FIG. 2 is a vertical sectional view of the chuck device.

3 is a view in the direction of arrow A in FIG.

FIG. 4 is a front view of the chuck body.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a view showing an engaged state of a rail and a slide member.

FIG. 7 is a view of the slide member as seen from below.

FIG. 8 is a sectional view taken along line CC of FIG.

FIG. 9 is a front view of a divided piece forming an annular chuck member.

FIG. 10 is a side view of the divided piece.

FIG. 11 is a front view of a rear stopper.

FIG. 12 is a sectional view taken along line DD of FIG.

[Explanation of symbols]

3 ... Chuck body, 4 ... Annular chuck member, 5 ... Steel plate coil, 11 ... Groove part, 12 ... Front stopper, 13 ... Rear stopper, 17 ... Rail, 18 ... Slide member, 20 ...
Solid lubricant, 24 ... Compression spring, 30 ... Arc-shaped divided pieces forming an annular chuck member, 31 ... Flange portion having a diameter larger than the inner diameter of the steel plate coil, 32 ... Fitting surface parallel to the inner diameter portion of the steel plate coil .

Claims (2)

[Claims] 1. A pair of chuck devices for rotatably holding both sides of an inner diameter portion of a cylindrical steel plate coil wound with a strip-shaped steel plate, the chuck device including a rotary shaft, and facing the rotary shaft. A pyramidal chuck body having a plurality of inclined guide surfaces that converge toward the tip is provided, and a chuck member is provided outside the chuck body. The chuck member is composed of a plurality of arc-shaped divided pieces. The divided pieces have a flange portion having a diameter larger than the inner diameter of the steel plate coil and a fitting surface parallel to the inner diameter portion of the steel plate coil, and each divided piece is slidable in the axial direction on the inclined guide surface of the chuck body. A steel plate coil chucking device, wherein a spring is provided between the chuck body and each of the divided pieces, the spring urging the divided pieces in the closing direction at all times. 2. The chuck device for a steel plate coil according to claim 1, wherein a solid lubricant is provided between the arcuate segment and the inclined guide surface.