JPS6138727Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chuck device for a steel plate coil.

A spiral cylindrical steel plate coil, which is a material for press working, etc., is rotatably supported, unwound, and introduced into a processing machine. Conventionally, as a rotatable support device for a steel plate coil, a pair of taper cones 3 are fitted and held at both ends of the inner diameter 2 of a steel plate coil 1, as shown in FIG.

According to this, since the outer diameter surface of the taper cone 3 exerts a force that pushes and expands both ends of the inner diameter 2 of the steel plate coil 1, both ends near the inner diameter 2 are rolled, and when the steel plate is unwound, both ends of the steel plate are rolled. There was a problem in that tens of meters of rolling elongation caused wakame-like deformation, making it unusable, resulting in tens of meters of wasted material that had to be scrapped.

The present invention solves the above-mentioned conventional problems and provides a chuck device which can clamp both ends of the inner diameter of a steel plate coil without deforming it by simply attaching an attachment to a conventional taper cone.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4. In FIG. 2, 1 is a steel plate coil, 2 is its inner diameter, and 3 is a tapered cone that is fitted and held at both ends of the inner diameter 2, and has the same structure as the conventional structure shown in FIG. 1. In the present invention, a chuck member 4 shown in FIGS. 3 and 4 is attached to this taper cone 3.
This is the one with the .

This chuck member 4 is connected to the inner diameter 2 of the steel plate coil 1.
It has a fitting surface 5 that is parallel to the plane of , and a flange 6 that abuts the side end surface of the steel plate coil 1 that is perpendicular to the fitting surface 5. It is an annular body that can be freely contracted (see Fig. 3) and expanded (see Fig. 4) in the radial direction by being pulled by a spring 10.
is slidably fitted onto the tapered surface of the taper cone 3. Reference numeral 7 designates a guide tongue piece having an inner diameter of 2 which projects inwardly from the edge of the fitting surface 5, and 9 designates a stopper which serves both to prevent the chuck member 4 fixed to the tip of the taper cone 3 from falling off and to prevent it from rotating.

Since the present invention has the above-described structure, when the taper cones 3 retreat from each other and do not clamp the steel plate coil 1, the divided claws of the chuck member 4 are drawn to each other by the tensile force of the spring 10. It slides on the tapered surface of the taper cone 3, moves to the small diameter portion at the tip, contacts the stopper 9, and is in a contracted state as shown in FIG.

Next, when clamping the steel plate coil 1, the taper cones 3 move forward toward the inner diameter 2 of the steel plate coil 1, and the fitting surface 5 of the chuck member 4 reaches the inner diameter 2.
A flange 6 is fitted into the side end surface of the steel plate coil 1.
comes into contact. Due to this contact with the flange 6, the movement of the chuck member 4 is stopped and only the taper cone 3 moves forward.
The taper surface of the tapered cone 3 pushes and expands the claws of the chuck member 4 in the radial direction as shown in FIG. It is crimped onto the inner diameter surface for clamping and holding. When unwinding the clamped steel plate coil 1, a brake is applied to the uncoiler in order to prevent meandering and to prevent the coil from unraveling due to inertia when the device is stopped.

As described above, in the present invention, the inner diameter of the steel plate coil is crimped and clamped parallel to the inner diameter surface by the fitting surface of the contractible and expandable chuck member fitted on the tapered surface of the taper cone. The coil is clamped in a dispersed manner without applying concentrated stress to the edge portion of the inner diameter of the coil, preventing deformation due to rolling elongation at both ends of the steel plate as in the conventional case, and eliminating the need to scrap the steel plate coil unnecessarily. In addition, the contraction and expansion of the chuck member in the radial direction is performed by advancing and retracting the taper cone, which eliminates the need for a special actuator, etc., and the chuck member can be immediately installed on a conventional taper cone. This type of chuck device can be used without any design change and has practical effects that have economical effects.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional chuck device, FIG. 2 is a sectional view of the device of the present invention, FIG. 3 is a front view of the chuck member when it is contracted, and FIG. 4 is a front view of the same when it is enlarged. DESCRIPTION OF SYMBOLS 1... Steel plate coil, 2... Inner diameter, 3... Taper cone, 4... Chack member, 5... Fitting surface, 6
...Flange, 10...Spring.

Claims (1)

[Scope of utility model registration request] In a chuck device that rotatably clamps both inner diameter ends of a spiral cylindrical steel plate coil with taper cones, a fitting surface parallel to the inner diameter surface of the steel plate coil and a side end surface of the steel plate coil perpendicular to this fitting surface are in contact with each other. The inner diameter of the annular chuck member, which has a contacting flange and is capable of contracting and expanding in the radial direction by mutually pulling arc-shaped claws divided into a plurality of parts on the circumference with a spring, is the tapered surface of the taper cone. A chuck device of a steel plate coil, characterized in that it is slidably fitted into a chuck device.