JPH09272032A - Work clamping piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work clamping piece capable of advancing and retracting a work rest and rotating a crank arm by one cylinder. SOLUTION: The intermediate section of a link arm 20, at both sides of which long holes are made, is pivotally supported on a base part 5 in the side opposite to a cylinder rod 6a, and the intermediate section of a clamp arm 10 is pivotally supported on the base part 5 in the side opposite to the link arm 20, and the pin 23 projected in a work rest 7 is slidably engaged in a long hole 21 so that the clamp arm 10 is turned between a clamp position and a standby position interlocked with the link arm 20 which is turned interlocked with the advance and retraction of the cylinder rod 6a, and the pin 16 projected in the base end part of the clamp arm 10 is engagedly inserted in the long hole 21a in the side opposite to the workpiece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece receiver attached to the tip of a cylinder rod that is driven back and forth between a standby position and an advanced clamp position, and a clamp position and standby to clamp the work at the tip. The present invention relates to a work clamp piece provided with a clamp arm rotatably supported at a base between positions.

[0002]

2. Description of the Related Art As shown in FIG. 3, a device of this type is clamped by a cylinder 4 attached to a receiving member 3 while the receiving member 3 is advanced to a clamping position by a cylinder 6 attached to a base 5. By rotating the arm 7, the work set at the clamp position is clamped. As a result, it is possible to avoid the detachability of the work and the interference with the spot gun when the automobile body is assembled.

[0003]

However, since the two dedicated cylinders for the straight line and the rotation are required, there is a cost problem, and the load of the linear drive cylinder is increased. Further, there is a problem in workability because the structure around the clamp position is bulky.

In view of the above point, the present invention has an object to provide a work clamp piece capable of advancing and retracting a work receiving member and rotating a crank arm with a single cylinder.

[0005]

In order to achieve this object, the present invention is attached to a tip end portion of a cylinder rod which is driven forward and backward between a standby position and an advanced clamp position by a cylinder provided at a base portion. In a work clamp piece provided with a work receiver and a clamp arm rotatably supported between a clamp position and a standby position at a base so as to clamp the work at a tip end by a work receiver advanced to a clamp position, The middle part of the link arm with elongated holes formed on both sides is pivotally supported on the base part on the side opposite to the work piece with respect to the cylinder rod, and the middle part of the clamp arm is pivotally supported on the base part on the side opposite to the work piece with respect to the link arm. In order to rotate the clamp arm between the clamp position and the standby position in conjunction with the link arm that is rotated in conjunction with the advance / retreat of the cylinder rod, A pin protruding from the receiver or cylinder rod is slidably inserted into the long hole on the work side, and a pin protruding from the base end of the clamp arm is slidably inserted into the long hole on the non-work side. Is characterized by.

As the work receiver advances to the clamp position by the operation of the cylinder, the work receiver or the pin of the cylinder rod rotates the link arm while sliding in the elongated hole on the work side. As a result, the clamp arm is driven while the pin at the base end of the clamp arm slides in the elongated hole on the side opposite to the work, and is rotated to the clamp position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A work clamp piece according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. A plate-shaped work receiver 7 is attached to a cylinder rod 6a of an air cylinder 6 provided on the base portion 5. On the other hand, the clamp arm 10 has a dogleg-shaped base portion 13 provided at the rear end portion of a normal L-shaped arm portion 12 whose front end portion is bent in an orthogonal direction and which contacts the workpiece receiver 7. There is.

An intermediate portion of a link arm 20 having elongated holes 21 and 21a formed on both sides is pivotally supported by a pin 25 on the side opposite to the work piece side with respect to the cylinder rod 6a, on a support frame 5a projecting from the base portion 5. ing. Further, a pin 15 pivotally supports an intermediate portion of the base 13 of the clamp arm 10 on the side opposite to the link arm 20 to the support arm 5b projecting from the base 5 on the side opposite to the work.

As shown in FIG. 2, these elongated holes are formed on both sides of the longitudinal slits 24 and 24a, respectively, and the pin 23 is inserted into the slit 24 on the workpiece side with the workpiece receiver 7 inserted therein. Is projected through the long hole 21,
The link arm 20 is interlocked with the forward / backward movement of the cylinder rod 6a.
Is rotated. The slit 24a on the side opposite to the work pin is inserted in the state in which the base end of the clamp arm 10 is inserted so that the clamp arm 10 is rotated between the clamp position and the standby position in conjunction with the rotation of the link arm 20. 16 is projected through the long hole 21a.

The operation of the work clamp piece thus constructed is as follows. In the state shown by the solid line in FIG. 1, the work receiver 7 and the clamp arm 10 occupy the standby position. When the work 1 is set to the clamp position and then the air cylinder 6 is operated, the work receiver 7 advances to the clamp position, and the link arm 2 interlocks with the advance.
The pin 0 is rotated in the counterclockwise direction as viewed in the figure by the pin 23 being driven upward while sliding in the slot 21. At the same time, the pin 16 is driven downward while sliding in the elongated hole 21a, so that the clamp arm 10 is rotated in the clamp direction.

As a result, as shown by a chain double-dashed line in the figure, the tip end 11 of the clamp arm 10 holds the work 1 when the work receiver 7 reaches the clamp position.
When the air cylinder 6 drives the cylinder rod 6a backward, the link arm 20 rotates clockwise as seen in FIG.
The clamp arm 10 is rotated in the opening direction toward the standby position.

It should be noted that the clamp arm 10 may be abolished from the above-mentioned L-shaped portion, and may have a shape that curves toward the pin 15 so as not to interfere with the work 1 and the link arm 20.

[0013]

As described above, according to the present invention, one cylinder can be provided by interlocking the forward / backward movement of the work receiver with the rotation of the crank arm via the link.
Therefore, the structure is simplified, the weight is reduced, which is advantageous in terms of cost, and since the surrounding area is not bulky, workability in the vicinity is also improved.

[Brief description of drawings]

FIG. 1 is a side view of a work clamp piece according to an embodiment of the present invention.

FIG. 2 is a perspective view of a link arm portion of the work clamp piece.

FIG. 3 is a side view of a conventional work clamp piece.

[Explanation of symbols]

 1 Work 5 Base 6 Air Cylinder 6a Cylinder Rod 7 Work Holder 10 Clamp Arm 20 Link Arm 21, 21a Oblong Hole

Claims (1)

[Claims] 1. A work piece is attached to a tip end of a cylinder rod which is driven forward and backward between a standby position and a clamp position which is advanced by a cylinder provided at a base, and a work piece tip which is advanced to a clamp position. In a work clamp piece provided with a clamp arm rotatably supported between a clamp position and a standby position so as to be clamped by a cylinder part, a middle part of a link arm having elongated holes formed on both sides is used as a cylinder rod. In contrast, the clamp arm is pivotally supported by the base portion, the intermediate portion of the clamp arm is pivotally supported by the base portion on the counter workpiece side with respect to the link arm, and is rotated in association with the forward and backward movement of the cylinder rod. In order to rotate the clamp arm between the clamp position and the standby position in conjunction with the link arm, the work receiver or the cylinder lock is rotated. A pin projecting on the rod is slidably engaged in the elongated hole on the work side, and a pin projecting on the proximal end of the clamp arm is slidably engaged in the elongated hole on the opposite work side. Work clamp piece characterized by.