JPH09108971A - Clamper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamper, having simple structure and the possibility of action failure and the damage of a work piece and a clamper, and quickly engaging/disengaging the workpiece. SOLUTION: In a clamper retaining a workpiece 3, having a recessed part 2, at a given position; the clamper is provided with a tubular main body park 4 having an opening 4a on a side surface, a piston 6 slidably provided in the main body part 4, a power source 11 connected to the piston 6, a clamp claw 7 journaled to the piston 6 and the end part of the claw 7 is protrudably provided from the opening 4a, an energizing means 8 for energizing the claw 7 in a specific direction, and a base mount 5 capable of abutting on one surface side of the workpiece 3. In this constitution, the workpiece 3 can be fixed between the claw 7 and the base mount 5, by pressing the edge of the recessed part 2 on the other surface side by the claw 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamper that holds a work in a detachable manner.

[0002]

2. Description of the Related Art Generally, mechanical parts are manufactured through various processing steps. For example, when punching, the workpiece is fixed to a jig (clamper) and then processed. Since these processes are usually automated in recent years, positional accuracy is required when fixing the work to the clamper, and it is necessary to engage and disengage the work quickly and easily.

By the way, although there are various shapes of the work, if the work has a simple shape such as a plate or a bar, the clamper may have a relatively simple structure. However, to clamp a workpiece with a complicated shape that has recesses or holes,
For example, there is no choice but to adopt a structure in which a work is sandwiched between two divided jigs.

[0004]

However, it is inevitable that the conventional two-divided clamper described above has a complicated structure. For this reason, it has been a cause of defective clamp operation and damage to the work and clamper. In addition, the clamper and the work are not fast enough to engage and disengage.

The present invention has been made in view of the above-mentioned matters, and it is a technical object to provide a clamper which has a simple structure and is free from the risk of malfunction or damage to a work clamper. Further, it is a technical object to provide a clamper that can quickly engage and disengage the clamper and the work.

[0006]

In order to solve the above technical problems, the present invention has the following structure in a clamper for holding a work 3 having a recess 2 in a predetermined position.

That is, a cylindrical main body 4 having an opening 4a on its side surface, a piston 6 slidably provided in the main body 4, and a power source 1 connected to the piston 6.
1 and the end portion of which is pivotally supported by the piston 6 and the opening 4
The clamp claw 7 is provided so as to be able to project from a, the biasing means 8 that biases the clamp claw 7 in a specific direction, and the base 5 that can abut on one surface side of the work.
The work is fixed between the clamp claw 7 and the base 5 by pressing the edge of the recess 2 on the other surface side.

The urging means 8 comprises a tip portion 3 of the piston 6.
It is possible to provide the spring body 9 provided on the second. Further, the inclined portion 10 can be formed at one end of the clamp claw 7.

Further, there is provided a post (base) 5 which is provided offset to the main body 4 and which locks one of the recesses 1 in the work 3, and the post 5 functions as the base and the positioning tool. Alternatively, the clamp claw 7 may press the edge of the other concave portion 2 of the work 3. [Main Body 4] The main body 4 has an overall cylindrical shape,
An opening is provided for exposing the clamp claw 7 to the outside. The cross-sectional shape of the main body 4 can be circular or rectangular. [Piston 6] The piston 6 is slidably provided in the main body portion 4. The cross-sectional shape of the piston 6 does not necessarily have to be the same as the internal cross-section of the main body 4. Further, a power source 11 is connected to the piston 6 and forcedly slides by this. [Clamp Claw 7] The clamp claw 7 is the piston 6
And is swingably provided by a shaft 7a orthogonal to the longitudinal axis of the piston 6.

The length from the shaft 7a to one end of the clamp claw 7 is set longer than the length from the shaft 7a to the outer peripheral portion of the main body 4. Therefore, when the clamp claw 7 is located at a position orthogonal to the longitudinal direction of the piston 6, one end of the clamp claw 7 projects from the main body 4. On the other hand, when the clamp claw 7 is positioned parallel to the longitudinal direction of the piston 6, the clamp claw 7 is housed in the main body portion 4. Here, the clamp claw 7 does not need to be completely housed in the main body portion 4, but may be housed inside the inner width of the work 3 (width in which the work 3 can be attached to and detached from the clamper).

It should be noted that both ends of the clamp claw 7 may be formed so as to project from the main body 4. Further, by providing the inclined portion 10 at one end of the clamp claw 7, the clamp claw 7 can be easily accommodated in the main body portion 4 and the work 3 can be easily attached to and detached from the clamper. [Biasing means 8] The biasing means 8 biases the clamp claws 7 so that the ends of the clamp claws 7 project from the inside of the main body 4 to the outside. The urging means 8 may be provided with a spring or the like at a portion that axially supports the clamp claw 7 to urge the clamp claw 7 at all times. Alternatively, the urging means 8 may be provided at the end of the main body 4 or the tip of the piston 6. The spring body 9 is provided so that the clamp claw 7 is provided only when the piston 6 is near the maximum stroke.
You may make it contact | abut with and urge it. [Power Source 11] The power source 11 is for sliding the piston 6, and any actuator can be used. That is, a hydraulic device such as a hydraulic pressure, an electric device such as a motor, and other pneumatic devices can be used.

The work 3 is subjected to processing such as cutting or drilling so that it has a function as a component. During such processing, the work 3 is held by the main clamper.

The recesses 1 and 2 are formed in the work 3, and are provided to allow the work 3 to function as a part. However, the formation of the concave portion for the purpose of holding the main clamper is not hindered. The recesses 1 and 2 can be exemplified by notches or holes.

Further, the post 5 can be formed in a shape in which the recess 1 is inscribed. When the recess 1 is a hole, it is preferable to form the post 5 into a cylindrical shape to be fitted in the hole. When the recess 1 is a notch, it is preferable that the post 5 be shaped so as to contact the notch. The post 5 is attached to the main body portion 4 while being offset, but it goes without saying that it can be provided separately from the main body portion 4.
You may provide integrally with the main-body part 4.

In the above structure, when the work 3 is clamped, the recess 2 of the work 3 is inserted (or engaged) in alignment with the main body 4. At this time, the piston 6 is pushed out with the maximum stroke by the power source 11, and the clamp claw 7 is housed in the main body 4.
When the work 3 is inserted to the predetermined position, the piston 6
When the clamp claw 7 is pulled back, the clamp claw 7 is rotated by the urging means 8, and the tip of the clamp claw 7 is exposed to the outside of the main body 4. When the piston 6 is further pulled back in this state, the tip of the clamp claw 7 becomes a right angle (right angle with respect to the longitudinal direction of the main body 4) while contacting the edge of the work 3, and the clamp claw 7 stops in a state of being crimped to the work 3. , The work 3 is fixed.
When the fixing of the work 3 is released, if the above-described operation is performed in reverse, the clamp claw 7 moves as the piston 6 moves forward,
The work 3 is accommodated in the main body 4 while being pressed by the end 4c of the opening 4a, and the work 3 is released.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. This device is a clamper for holding a work (workpiece) 3 having at least two recesses 1 and 2 at a predetermined position. The held work 3 is released from this apparatus after being processed by a machine tool (not shown).

This apparatus has an external appearance in which a fluid pressure type power source 11 is connected to one end of a cylindrical main body portion 4, an arm 5a extends from a connecting portion between the both, and a columnar shape is formed from a tip portion of the arm 5a. The post 5 serving as the base of is attached in parallel with the main body 4. The post 5 is a bolt 5
arm 5 through b, washer 5c, and liner 5d
a.

The main body 4 is provided with 2 parallel to its longitudinal direction.
Two openings 4a and 4b are formed. The one opening 4a is formed shorter than the other opening 4b in the longitudinal direction of the main body portion 4. Further, a flange (clamper guide) 29 is provided between the main body 4 and the power source 11 so as to project.

A piston 6 is slidably provided inside the main body 4. One end of the piston 6 is connected to a part of the power source 11, and the power source 11
Slides in the arrow F direction and vice versa.

A clamp claw 7 is provided at the tip of the piston 6.
Is provided. The clamp claw 7 is swingably provided by a shaft 7a orthogonal to the longitudinal axis of the piston 6. The total length of the clamp claw 7 is set to be longer than the width of the piston 6, and when the clamp claw 7 is in a position orthogonal to the longitudinal direction of the piston 6, the clamp claw 7 is formed.
Both ends of are projected from the openings 4a and 4b of the main body portion 4. Further, when the clamp claw 7 is positioned parallel to the longitudinal direction of the piston 6, the clamp claw 7 is housed in the main body portion 4.

Further, at one end of the clamp claw 7, there is provided an inclined portion 10 whose inclined surface faces the tip direction of the piston 6 when the clamp claw 7 is in a position orthogonal to the piston 6.

A biasing means 8 is installed at the tip of the main body 4. This urging means 8 is provided at an angle of about 45 degrees with respect to the center line of the main body portion 4, and when the piston 6 starts retreating from the maximum stroke state in the arrow F direction, it pushes the clamp claw 7. The clamp claw 7 is slightly rotated to expose it from the main body 4.

The urging means 8 is installed in a plug body 32 provided at the tip of the main body 4. A push pin 31 is inserted into a chamber formed in the plug body 32, and then a spring is inserted. A coil spring as the body 9 is inserted, and a fixing bolt 30 for sealing them is screwed.

In the power source 11, a fluid pressure piston 21 is fitted inside a cylinder 20, and an outer end of the cylinder 20 is closed by a lid 22. A spacer 23 is provided between the cylinder 20 and the lid 22, and an O-ring 24 ensures hermeticity.

The lid 22 is provided with a first port 25 connected to a pressure source (not shown). On the other hand, a second port 26 connected to the pressure source is provided on the side surface of the cylinder 20. The fluid pressure piston 21 has a first port 25.
Between the first port 25 and the second port 26
By supplying and discharging the working fluid from the port 26, the fluid pressure piston 21 is operated. Also,
An O-ring 2 is provided between the cylinder 20 and the piston 6.
7, 28 are provided so that the working fluid does not leak.

The arm 5a includes a bolt 36, a lock washer 33, and a bush 34 as a work base (not shown).
It is fixed to. Further, the bush 34 is fixed by a screw 35 that prevents loosening.

The operation of the above configuration will be described. First, when the work 3 is clamped to the apparatus, the recesses 1 and 2 of the work 3 are respectively inserted into the post 5 and the main body 4
Insert (or engage) according to. At this time, the piston 6 is pushed out by the power source 11 at the maximum stroke, and the clamp claw 7 is moved to the end 4c of the opening 4a.
It falls down by abutting against and is accommodated in the main body portion 4 (the position where the clamp claw 7 is indicated by a two-dot chain line in FIG. 1).
Therefore, the work 3 can smoothly advance to the back of the main body 4. When the clamp claw 7 is housed in the main body 4, the push pin 31 is in pressure contact with the other end of the clamp claw 7.

Next, when the work 3 is inserted to a predetermined position, the power source 11 is activated and the pulling back of the piston 6 is started. Simultaneously with the start of the backward movement of the piston 6, the clamp claw 7 is slightly rotated around the shaft 7a by the urging force of the push pin 31, and the inclined portion 10 of the clamp claw 7 is opened.
It is exposed from a. In this state, when the pulling back of the piston 6 is continued by the operation of the power source 11, the clamp claw 7
Is a right angle (right angle to the longitudinal direction of the main body 4) while contacting the edge of the work 3, and one end (opening 4a side) and the other end (opening 4b side) of the clamp claw 7 is the work. It stops in the state where it is crimped to 3 (the position where the clamp claw 7 is shown by the solid line in FIG. 1).

As a result, the work 3 is fixed between the post 5 and the clamp claw 7. When releasing the work 3,
The above operation may be performed in reverse. That is, the piston 6 is stroked in the arrow F direction so that the clamp claw 7 is moved to the opening 4a.
The workpiece 3 is pulled out from the apparatus by bringing the workpiece 3 into contact with the end 4c and tilting it.

The post 5 is made to act only on the positioning of the work 3, and the work 3 is clamped on the clamp claw 7 and the flange 2.
You may comprise so that it may press and fix between 9 and.

[0031]

According to the present invention, it is possible to provide a clamper which has a simple structure and is free from the malfunction of the apparatus and the risk of damage to the work and the clamper.

Further, since the movable part of the apparatus is small, the work can be engaged and disengaged quickly. Furthermore, when the biasing means is a spring body provided at the end of the main body, the clamp claw can be raised more reliably.

Further, if the inclined portion is formed at one end of the clamp claw, the required swing angle of the clamp claw becomes smaller, so that the device can be further downsized and the work can be easily attached to and detached from the device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an entire device showing an embodiment of the present invention.

[Explanation of symbols]

 1, 2 ... Recess 3 ... Workpiece 4 ... Main body 4a ... (One) opening 4b ... (Other) opening 4c ... End 5 ... Post (base) 5a .. Arm 5b .. Bolt 5c ..・ ・ Cylinder 21 ・ ・ Fluid pressure piston 22 ・ ・ Lid 23 ・ ・ Spacer 24 ・ ・ O-ring 25 ・ ・ First port 26 ・ ・ Second port 27, 28 ・ ・ O-ring 29 ・ ・ Flange 30 ・ ・ Bolt 31 ..Push pin 32..Stopper 33..Key washer 34..Bush 35..Screw 36..bolt

Claims (3)

[Claims] 1. A clamper for holding a work having a concave portion at a predetermined position, a cylindrical main body having an opening on a side surface, a piston slidably provided in the main body, and a piston connected to the piston. Power source, a clamp claw that is axially supported by the piston and has an end protruding from the opening, a biasing means that biases the clamp claw in a specific direction, and abuts on one surface side of the work. A clamper comprising a possible base, and the clamp claw is configured to fix the work between the clamp claw and the base by pressing the edge of the other surface side of the recess. 2. The urging means includes a spring body provided at a tip portion of the main body portion.
The described clamper. 3. The clamper according to claim 1, wherein an inclined portion is formed at one end of the clamp claw.