JPS604658Y2 - clamp device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a clamp device used, for example, in a machine tool.

There have been various types of clamping devices of this type in the past, and although all of them are capable of easily attaching and detaching a specific workpiece, there is no such device that can easily set many types of workpieces in a short period of time.

In particular, there is no workpiece with ribs that can be attached or detached.

This invention was made in view of the above circumstances, and the object is to provide a lamp device in which various types of workpieces can be easily set, and in particular, workpieces having ribs can be easily attached and detached.

This invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a plan view showing an embodiment of the clamping device of this invention, and FIG. 2 is a sectional view taken along line II in FIG. 1.

1 in the figure is the base on which work A is placed, and this base 1
A block 2 is fixed to the block 2 with bolts 3.

The block 2 serves as a reference for the clamp device, and the block 2 is provided with a shaft 4, and a swing shaft 5 is attached to the shaft 4 so as to be freely swingable.

The swing shaft 5 has a slope "a99" and a lamp claw 7 which swings and travels freely relative to the swing shaft 5 via a spherical bearing 6.
A coil spring 8 is incorporated via a pin 1-2 in order to always act on the clamp claw 7 in the opening direction.

A recess ggd' is provided at a predetermined position of the clamp claw 7,
A pin 12 is fitted into this, and the clamp claw 7 is thereby positioned.

Further, on the outer periphery of the clamp claw 7, for example, four types of claw portions are divided and arranged so as to be able to handle many types of workpieces.

Further, in the block 2, a piston 9 having a spherical surface "b" at the tip and a cylinder 11 equipped with a coil spring 10 for retracting the piston are in sliding contact with the slope "a" of the swing shaft 5 and the spherical surface "btt" of the piston 9. installed in position.

Further, a lever 14 is attached to the swing shaft 5 by a pin 13, and this lever 14 is attached to the pin 1 provided on the block 2.
A coil spring 16 is provided which always acts on the swing shaft 5 in the counterclockwise direction via the coil spring 16.

Further, hydraulic pressure can be supplied and discharged into the cylinder 11 by a pump 18, and a switching valve 17 is connected to this supply and discharge path.
is provided.

The operation of the clamping device of this invention constructed in this way will be explained below, but the explanation will be divided into two: the setup operation and the post-setup clamping operation.

First, to explain the set-up action with reference to Figs. 1 and 2, the clamp claw 7 shown in solid line in Fig. 1 clamps a certain workpiece, completes machining, and then moves on to a different workpiece with a different rib c''. When performing clamping A, the set-up of the clamp claw 7 is completed by indexing the clamp claw 7 by 90 degrees to the position shown by the two-dot chain line in FIG.

The indexing position of the clamp claw 7 is determined by a pin 12 that is constantly pushed up by a recessed pile spring 8 provided in the clamp claw 7.

Next, the clamping action after the set-up is completed will be explained with reference to FIG.

First, with the clamp claw 7 and piston 9 in the position shown by the two-dot chain line, insert the workpiece A into the base 1 and operate the switching valve 17 to the clamp side. The piston 9 begins to rise, and the spherical surface "°b" pushes up the slope "a".

Then, the swing shaft 5 stands vertically, and the clamp claw 7 protrudes to a position where the workpiece A can be clamped.

When the piston 9 further rises, the spherical surface "b" pushes up the clamp claw 7.

Then, the clamp claw 7 swings clockwise around the spherical bearing 6 against the coil spring 8 to clamp the workpiece A.

Once machining of workpiece A is completed in the clamped state,
Operate the switching valve 17 to the unclamp side.

Then, the piston 9 begins to descend due to the accumulated force of the coil spring 10, and the clamp claw 7 releases the clamping force due to the force of the coil spring 8.

As the piston 9 continues to descend further, the swing shaft 5 is moved counterclockwise by the force of the coil spring 16, and the clamp claw 7 is retreated to a position where the workpiece A can be removed.

As described above, this invention allows the clamp claw to be set up easily and quickly by indexing the clamp claw by 90°, and also enables insertion and removal of workpieces with ribs by retracting the clamp claw. It has two features that make it easy to use.

Therefore, it is possible to improve work efficiency and machine operation rate even in the case of a workpiece having ribs.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the clamping device according to this invention, and FIG. 2 is a sectional view taken along the line II in FIG. 1 and viewed in the direction of the arrow. 1...Base, 2...Block, 3.
...Bolt, 4...Shaft, 5...
Swing shaft, 6... Spherical bearing, 7... Crane 7'L 8, 10, 16... Coil spring, 9
...Piston, 11 cylinder, 12, 13.1
5...Pin, 14...Lever, 17...
...Switching valve, 18...Pump.

Claims (1)

[Scope of utility model registration request] A block is provided on the base on which different types of workpieces can be placed, a swing shaft is pivoted to this block so as to be rotatable in a predetermined direction, and a swing shaft on the opposite side to this pivot is mounted on the outer peripheral surface of the swing shaft. ,
A clamp claw having a shape corresponding to the different type of workpiece is supported in a freely swingable manner, and the workpiece is sandwiched between the clamp claw and the base, and a pressing force is applied in the opposite opening direction. A clamping device equipped with a pressing means that applies pressure.