JPS6243701Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a simple attachment/detachment jig for attaching and detaching a workpiece from a processing machine.

This simple attachment/detachment jig is useful for clamping and unclamping the workpiece to/from the processing machine using springs or its own weight, such as clamping and unclamping the welded part in spot welding. It is used to easily maintain either the clamped state or the unclamped state during operation or unclamping.

[Conventional technology]

Conventionally, such simple attachment/detachment jigs have been used, for example, by attaching a workpiece such as a steel plate member that makes up a car body to a processing machine such as a spot welding machine, performing spot welding, and then removing it from the processing machine after the completion of the process. Used to remove workpieces.

The attachment/detachment jig for attaching and detaching the workpiece from the machine tool can securely hold the workpiece when clamping it to the processing machine, and easily remove the workpiece when unclamping it from the processing machine. You need to be able to do that. Conventionally, a simple method using a clamping jig such as a bolt or a hydraulic cylinder has been used to deal with such contradictory operations. In the case of clamping by bolt tightening,
The workpiece is clamped and fixed between the workpiece and the processing machine by tightening bolts, etc., and the workpiece is removed from the processing machine by loosening the bolts.
Furthermore, in the case of clamping using a hydraulic cylinder, the hydraulic cylinder is actuated and moved forward to pressurize the workpiece, and the workpiece is clamped and fixed between the workpiece and the processing machine. The hydraulic cylinder is then moved backward to remove the workpiece from the processing machine.

On the other hand, there is a method in which the workpiece is attached by pressing the workpiece against the processing machine using a spring or its own weight, and then the workpiece is removed by releasing the pressure of the workpiece against the processing machine due to the spring or its own weight. is also often taken.

[Problem that the invention attempts to solve]

Among the above-mentioned conventional techniques, the former has disadvantages in that bolt tightening lacks reliability in attaching and detaching the workpiece, and when using a hydraulic cylinder, the attaching and detaching jig is specialized and complicated.

In addition, in the latter method using springs, dead weight, etc., the structure for holding the force of the springs, dead weight, etc. becomes complicated, and there remains the problem that it takes time and effort to attach and detach.

Therefore, it is an object of the present invention to provide a simple workpiece attachment/detachment jig that has a simple structure and excellent durability and is capable of easily and reliably attaching and detaching the workpiece to a processing machine. The purpose is

[Means for solving problems]

Therefore, the simple attachment/detachment jig for workpieces of this invention is
It is characterized by the fact that workpieces can be reliably and easily attached and detached by utilizing the clamping and unclamping actions of an operator when applying and releasing forces such as springs and own weight.

The specific configuration of the present invention is a simple attachment/detachment jig for fixing and removing a workpiece in a machine tool,
A clamp part for holding and fixing the workpiece,
A center shaft connected to the clamp portion, a pipe-shaped handle having at least a circular external cross section that is fitted into the center shaft and slides on the outside of the center shaft, and a handle that is internal to the handle and is attached to the center shaft. a spring that applies a biasing force in the axial direction between the handle and the center shaft as the hand moves in the approach direction; and a rectangular corner member that is fixed to the outside of the handle and extends in a direction perpendicular to the axial direction. , a pedestal disposed facing the corner member and located on the same side as the clamped portion facing the clamp, and a pedestal disposed on the pedestal with one end pivotally supported by the pedestal and the other ends biased in a direction to close each other. and a pair of claw members that grip the corner member by engaging with the flat portion of the corner member.

[Effect]

According to the simple attachment/detachment jig of the present invention, when the claw member and the corner member are engaged, the corner member provided on the handle is prevented from moving in the radial direction by the claw member. Therefore, the handle is also prevented from moving, and the workpiece is held in a clamped or unclamped state. Further, when the claw member and the corner member are not engaged, they are held in the opposite unclamped state or clamped state.

The engagement between the claw member and the corner member occurs when no biasing force is applied to the spring between the center shaft and the handle. When a biasing force is applied to the handle and the corner member is displaced in the axial direction, the circular outer periphery of the claw member and the handle come into contact, and the outer periphery pushes the claw member apart, causing the handle and the claw member to separate. is disengaged.

〔Example〕

Embodiments of the present invention will be described below based on the accompanying drawings.

1 to 3 are drawings for explaining an embodiment of a simple attachment/detachment jig for workpieces according to the present invention.

Fig. 1 is a partially cutaway front view of the attachment/detachment jig, Fig. 2 is a view taken along the arrow in Fig. 1, and Fig. 3 is a
FIG. 3 is a side view of the attachment/detachment jig.

The simple attachment/detachment jig for workpieces in this embodiment is comprised of the following parts.

The handle 1 has a pipe shape with a circular cross section, and is gripped and operated by the operator.

The corner member 2 is fixed to the pipe-shaped handle 1, and the corner member 2 is rotatably attached to the pedestal 8 with a pin 7, and a spring provided between both members. 9, it is gripped by the claw 5 which is biased in the closing direction.

A spring 4 is inserted between the center shaft 3 and the handle 1, so that the handle 1 can be slid.

The spring 4 biases the corner member 2 attached to the handle 1 in the axial direction within the pipe-shaped handle 1 in order to always hold the corner member 2 in the position shown by the solid line in FIG. Note that the clamp portion 6 is connected to a clamp mechanism for gripping a workpiece during spot welding, for example. In the figure,
An example is shown in which the clamp part 6 is rotated by its own weight to grip a workpiece.

Next, the operation of this embodiment will be described.

In FIG. 1, the operator pushes the handle 1 in a direction that compresses the spring 4, that is, from the right side to the left side along the axial direction in FIG.

At this time, center shaft 3 does not move.

Due to this action, the corner member 2 comes off from the claw 5, and
Slide and move to the position indicated by the two-dot chain line.

Next, rotate handle 1. That is, when the handle 1 is operated upward in FIG.
The cylindrical portion of the handle 1 that is in contact with the handle 1 pushes the pawls 5 apart against the bias of the spring 9, and the pawls 5 are expanded to the area indicated by the two-dot chain line on the handle 1. The handle 1 easily comes off the claw 5, and the clamp part 6 of the simple attachment/detachment jig for the workpiece presses down on the workpiece placed on the same fixed side as the pedestal 8 by its own weight, so the processing machine The work of clamping the workpiece to the machine can be completed.

On the other hand, when unclamping the workpiece from the processing machine, by rotating the handle 1 in the opposite direction, the clamp part 6 is released from the workpiece. By pressing downward and returning it, the cylindrical portion of the handle 1 hits the claw 5, and in this case as well, it is easily opened and the handle 1 is housed in the claw 5. When the operator releases the handle 1, the corner member 2 of the handle 1 enters the claw 5 due to the force of the spring 4, and the stopper (not shown) of the handle 1 and the center shaft 3 It stops at a predetermined position.

〔effect〕

As is clear from the above, according to the simple attachment/detachment jig for workpieces according to the present invention, it is possible to easily and reliably attach/detach the workpiece to/from the processing machine using the clamping and unclamping operations. can.

Furthermore, since the structure for attaching and detaching is simple, it has excellent durability.

[Brief explanation of the drawing]

1 to 3 are drawings for explaining an embodiment of a simple attachment/detachment jig for workpieces according to the present invention. FIG. 1 is a partially cutaway front view of the attachment/detachment jig. FIG. 2 is a view taken along the arrows in FIG. FIG. 3 is a side view of the attachment/detachment jig. 1...Handle, 2...Corner member, 3...Center shaft, 4...Spring, 5...Claw (claw member), 6...Clamp portion, 8...Pedestal, 9...Spring.

Claims (1)

[Scope of claim for utility model registration] A simple attachment/detachment jig for fixing and removing a workpiece in a machine tool, comprising a clamp part for holding and fixing the workpiece, a center shaft connected to the clamp part,
A pipe-shaped handle having at least a circular external cross section that is fitted into the center shaft and slides on the outside of the center shaft; a spring that applies an axial biasing force between the hand and the center shaft; a rectangular corner member that is fixed to the outside of the handle and extends in a direction perpendicular to the axial direction;
a pedestal disposed opposite to the corner member and located on the same side as the clamped portion facing the clamp; It consists of a pair of claw members that grip the corner member by engaging with the flat portion of the member, and when the claw members and the corner member are engaged, the clamp portion is placed in either a clamped state or an unclamped state. A simple attachment/detachment jig for a workpiece, characterized in that the clamp part is held in either an unclamped state or a clamped state when the claw and the corner member are not engaged.