JPH04128132U - clamp device - Google Patents

Abstract

(57) [Summary] [Purpose] By clamping the workpiece with the claws of multiple clamp pieces, the workpiece can be clamped strongly without being distorted.
Enables high precision machining. [Structure] A plurality of compartments 7 are arranged in parallel on the mounting base 1 so as to be orthogonal to the drive shaft 2 that is pivotally supported on the mounting base 1, and the clamp pieces 13 housed in each compartment 7 are respectively fixed to the drive shaft 2. By constantly pressing each clamp piece 13, the claw 14 formed at the tip of each clamp piece 13 is brought into a clamped state.A spring 18 is attached to each clamp 13 and is provided in the mounting base 1. A piston housed in the air chamber 9 is operated with compressed air to press the clamp pieces and release the clamped state of each claw.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a clamp for fixing workpieces during processing such as cutting and polishing. It is related to the device.

0002

[Conventional technology]

The clamping device uses pneumatic pressure, hydraulic pressure, screws, etc. for strong clamping. There are many things to do. In addition, clamping is often done at one location.

0003 This kind of clamping device is effective for workpieces that do not deform due to external force, but If the workpiece is made of a material that easily deforms or is thin, the workpiece may become distorted, making it difficult to achieve high precision. There was a drawback that it could not be processed.

0004

[Problem that the idea aims to solve]

The problems that this invention attempts to solve are workpieces made of materials that easily deform due to external force, and workpieces that are thin. The goal is to clamp the workpiece effectively without distorting it.

[0005]

[Means to solve the problem]

In order to solve the above problems, this invention has the following configuration. Multiple compartments are installed in parallel on the mounting base, orthogonal to the drive shaft that is pivotally supported on the mounting base, and each compartment Each clamp piece housed inside is fixed to the drive shaft and each clamp piece is constantly pressed. By doing this, the claws formed at the tip of each clamp piece are placed in a clamped state. Attach each spring to the clamp piece. Then, in the air chamber provided within the mounting base. The clamp piece is pressed by sending compressed air into the air chamber, and the spout is A piston is provided that releases the clamped state of each pawl against the pressing force of the ring.

[0006]

[Effect]

If the compressed air in the air chamber is released, the clamp piece will not be pressed by the piston, so it will not touch the drive shaft. Each fixed clamp piece is rotated around the drive shaft by the pressing force of each spring. It rotates, and each claw becomes clamped to clamp the workpiece.

[0007] On the other hand, if compressed air is sent into the air chamber, the clamp piece will be pressed by the piston, so Resisting the pressing force of each spring, each clamp piece moves in the opposite direction with the drive shaft as the axis. Rotate all at once in the opposite direction to release the clamped state of each claw.

[0008] Multiple pawls each pressed by a spring when each pawl is in the clamped state Since the workpiece is clamped with a clamp, the clamping force is strong and does not distort the workpiece.

[0009]

【Example】

In Figures 1 to 4, 1 is a mounting base, and the upper part of the front side (workpiece W side) is a drive unit. A shaft 2 is pivotally supported. 3 penetrates the mounting base 1 in the vertical direction, and 4 penetrates the mounting base 1 in the front and back direction. These are a pair of mounting holes through which male screws for fixing the mounting base 1 installed are inserted. Also 5 is installation A pair of internal threads are provided on the top surface of the base 1 and 6 are provided on the front surface of the mounting base 1, respectively. The drive shaft 2 is fixed by screwing male screws into these holes 5 and 6.

0010 Reference numeral 7 denotes five compartments, which are provided at equal intervals on the mounting base 1, perpendicular to the drive shaft 2. , are open on the front, top and bottom surfaces of the mounting base 1.

[0011] As shown in Figures 1 and 2, 8 is a spring housing hole, which is inserted diagonally upward and backward. It is recessed into each compartment 7 and opens at the bottom of each compartment 7. and each spring The front portions of the receiving holes 8 are each provided with a female thread.

0012 In FIGS. 1 and 3, 9 is provided on the rear protrusion of the mounting base 1, and is provided on the rear surface of the mounting base 1. It is a cylindrical air chamber that opens to the air pipe (or air hose) connecting tube 10. It is covered with a removable lid 11 with a lid attached thereto. As shown in Figure 1, 12 is a rod storage It is a hole that runs from the air chamber 9 through the mounting base 1 coaxially with the center axis of the air chamber 9. It is provided diagonally downward and forward so as to reach into the central compartment 7. Furthermore, each spring The reason why the accommodation hole 8, the air chamber 9, and the rod accommodation hole 12 are provided diagonally is because the clamping device is This is to make the structure compact, and it is also possible to install each horizontally instead of the example. It is possible.

[0013] Reference numeral 13 indicates plate-shaped clamp pieces, each of which is housed in a compartment 7 and fixed to the drive shaft 2. has been done. The upper parts of these clamp pieces 13 protrude above the mounting base 1 from the compartment 7. The tip is bent forward to form a claw 14. Also, each clamp piece 13 , near the center of the lower part located below the drive shaft 2 protrudes forward to form a spring hook. form 15. However, only the central clamp piece 13 has a lower end that protrudes rearward. A rod abutting portion 16 is formed within the rod accommodating hole 12.

[0014] Reference numeral 17 denotes a stopper having a male thread, which is screwed into the female thread of the spring accommodation hole 8, respectively. and between each spring hook part 15 and each stopper 17, there is a A spring 18 is tensioned, and the spring 18 constantly presses each clamp piece 13. Press. Therefore, each clamp piece 13 holds the drive shaft 2 by the pressing force of the spring 18. The claw 14 is pivoted forward as a shaft and is urged to be in a clamped state. Na The pressing force of each spring 18 can be adjusted by moving the stopper 17 back and forth. Wear.

[0015] 19 is a piston that is slidably housed in the air chamber 9, and its rod 20 is located at the front. A clamp piece 13 is slidably inserted into the rod accommodation hole 12 and has a rod end in the center. It is in contact with the rod contact portion 16 of.

[0016] Therefore, an air pipe connected to an air compressor (not shown) is connected to the air pipe connection tube 10. If the pipe 21 is attached and compressed air is sent into the air chamber 9, the piston 19 will operate, The rod 20 pushes the rod contact portion 16 of the central clamp piece 13 diagonally downward and forward. child As a result, the central clamp piece 13 rotates the drive shaft 2 against the pressing force of the spring 18. The claw 14 rotates rearward. The other clamp piece 13 is attached to the drive shaft 2. Since these claws 14 are fixed, they also rotate rearward. That is, each pawl 14 is a clamp. It will be in the deactivated state.

[0017] Here, the number and shape of the clamp pieces are arbitrary depending on the work to be clamped. For example, in FIG. 5, when clamping a work W with a step, the claw 1 of the clamp piece 13 This shows the case where the height and length of 4 are changed. In addition, Fig. 6 shows unevenness in the front and back direction. In order to clamp a workpiece W with a complicated shape, the length of the claw 14 of the clamp piece 13 must be adjusted. Here is an example. Note that 22 in Figures 5 and 6 fixes the mounting base 1 to a processing table, etc. This is a male screw inserted into the mounting hole 3. Also, 23 is the female thread 5, and 24 is the female thread 6. This is a male thread for fixing the drive shaft 2 by being screwed onto the drive shaft 2. 25 is a jig.

[0018] In the above embodiment, the side surface of the workpiece W is pressed against the jig 25 with the claws 14 to clamp it. Although the illustration shows a case where the workpiece is It is also possible to

[0019]

[Effect of the idea]

Because the workpiece is clamped with multiple clamp pieces, the clamping force is good, and Because it is pressed by a spring, no force is applied and the workpiece does not become distorted.

[0020] In addition, by changing the number and shape of the clamp pieces, even workpieces with complex shapes can be clamped. can be

[0021] Furthermore, if you install spring housing holes, air holes, and rod housing holes diagonally, you can make the device more compact. It can be formed into an exact shape.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the line AA in FIG. 3, showing a longitudinal section of the central portion.

FIG. 2 is a schematic cross-sectional view showing a state in which a spring presses a clamp piece.

FIG. 3 is a schematic plan view showing the arrangement of clamp pieces.

FIG. 4 is a schematic front view showing how clamp pieces are arranged.

FIG. 5 is a schematic plan view of another embodiment in which the height and length of the claws of the clamp piece are changed.

FIG. 6 is a schematic plan view of another embodiment in which the length of the claw of the clamp piece is changed.

[Explanation of symbols]

1 Mounting stand 2 Drive shaft 7 Separate room 9 Air chamber 13 Clamp piece 14 Nails 18 Spring 19 Piston W work

Claims (1)

[Scope of utility model registration request] Claim 1: A plurality of compartments are arranged in parallel on the mounting base so as to be orthogonal to a drive shaft pivotally supported on the mounting base, and the clamp pieces housed in each compartment are respectively fixed to the drive shaft. A spring is attached to each clamp piece, which causes the claw formed at the tip of each clamp piece to be in a clamped state by constantly pressing the spring. A clamping device equipped with a piston that presses a clamp piece by feeding and releases the clamped state of each pawl against the pressing force of a spring.