JPH0341907Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a positioning device for a workpiece that performs processing such as spot welding.

<Prior art> Conventionally, a workpiece positioning device used when performing processing such as spot welding on a workpiece is as shown in Fig. 5.
Workpiece support stands 2a and 2b are fixedly installed on the base plate 1, and a workpiece receiving member 4a equipped with a reference pin 6 for positioning is attached to one support stand 2a on a rotating shaft 5a.
It is pivotably supported around a horizontal axis, and
On the other support stand 2b, a first cylinder 3a pivotally supports a workpiece holding member 4b that is in contact with the workpiece receiving member 4a so as to be able to pivot around a horizontal axis by a rotary shaft 5b, and drives the workpiece receiving member 4a to rotate;
A second cylinder 3b that swings and drives the work holding member 4b is supported by the support stands 2a and 2b so as to be able to swing in the vertical axis direction, respectively, and the first and second cylinders 3a and 3b The workpiece receiving member 4a and the workpiece holding member 4b are swiveled open and closed, and the workpieces W on the support stands 2a and 2b are positioned and clamped, and spot welded by a spot welding gun 7.

<Problems to be Solved by the Invention> The conventional apparatus described above has poor workability because there is a risk of interference between the work holding member 4b and the spot welding gun 7 during spot welding work. Furthermore, when taking out the workpiece W from the processing position, the workpiece W cannot be pulled out horizontally due to the unclamped workpiece holding member 4b on the operator's side, and must be lifted upward to be taken out. It was a pain to take it out. Furthermore, two cylinders 3a and 3b for clamping and unclamping are required, which poses problems of high cost and large equipment space.

<Means for solving the problems> The present invention is a workpiece positioning device that solves the above problems, and its configuration is such that a pair of support shafts are arranged in parallel in the vertical axis direction on a base plate equipped with a workpiece support stand. A work holding member is supported on each of the support shafts so as to be horizontally rotatable, a cylinder is fixed in the horizontal axis direction on the base plate at the rear of the support shaft, and the piston rod of this cylinder is A knuckle is fixed to the end, and the work holding member is connected to this knuckle through a guide elongated hole by a pin in the vertical axis direction, and on both sides of the knuckle there is a workpiece that is in contact with the work holding member and clamps the work. A receiving member is fixed, a reference pin for positioning is provided protruding from the tip of the workpiece receiving member, and a recess into which the reference pin engages is provided in the workpiece holding member.

<Operation> The present invention moves a workpiece supported on a support stand forward by moving one cylinder forward at one end thereof, and at the same time horizontally pivots a pair of workpiece holding members to lift the workpiece. Positioning and clamping is performed using a receiving member.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In FIG. 1, 1 is a base plate, 2a and 2b are support stands for a workpiece W, and 7 is a spot welding gun.

A pair of support shafts 10 are mounted on the base plate 1 near the one support stand 2a (on the side opposite to the operator side).
(see Figure 2) are fixed in parallel in the vertical axis direction,
A workpiece holding member 11 is supported on each of the support shafts 2a, 2b so as to be horizontally rotatable. (Fig. 2, 4
(See figure) A bracket 12 is fixed on the upper surface of the end of the base plate 1 behind the support shaft 10, and this bracket 1
A vertical support plate 13 is fixed to 2. A cylinder 14 is fixed to the support plate 13 in the horizontal axis direction toward the support shaft.

A knuckle 16 is integrally attached to the end of the piston rod 15 of the cylinder 14, and as shown in FIGS. 2 and 3, a pin 17 in the vertical axis direction is inserted into the knuckle 16 through the elongated guide hole 18 of the pair of work holding members 11. connected by.

Furthermore, a workpiece receiving member 19 facing the workpiece holding member 11 is fixed to both sides of the knuckle 16, and a reference pin 20 for positioning is provided protruding from the tip of the workpiece receiving member 19. Further, the work holding member 11 is provided with a recess 21 into which the reference pin 20 is inserted.

Next, the operation of the above configuration will be explained. The original position state before positioning and clamping the workpiece W is the retracted end of the piston rod 15, and in this state, as shown by the imaginary line in FIG. 2, the workpiece receiving member 19
is in the backward position, and the work holding member 11 is in the knuckle 1
It is pulled rearward by the pin 17 of No. 6, and horizontally pivots into an open state using the support shaft 10 as a pivot point.

In this unclamped state, the workpiece W is
a, 2b, and is carried out again. Support stand 2
A workpiece W is carried into the workpieces a and 2b, and in order to position and clamp the workpiece, the piston rod 15 is moved forward by the cylinder 14. piston rod 15
Due to the forward movement of the workpiece W, the workpiece receiving member 19
Further, the work holding member 11 horizontally pivots in the closing direction toward the work W using the support shaft 10 as a pivot point by the advancement of the pin 17 integrated with the knuckle 16. Then, the reference pin 20 at the tip of the workpiece receiving member 19 passes through the reference hole of the workpiece W to position the workpiece W, and the workpiece receiving member 19
The work W is held and clamped by the work holding member 11 and the work holding member 11.

<Effects of the invention> As described above, according to the invention, a workpiece receiving member that is moved horizontally backward by a cylinder is placed on one side of the workpiece support, particularly on the base plate on the side opposite to the worker's working position. and a work holding member that opens and closes by horizontal rotation using the forward and backward movement of the work receiving member, so there is no interference between the spot welding gun and the work holding member, improving spot workability. Further, the work can be carried in and out in the horizontal direction, making it easier to handle the work. Furthermore, since the work receiving member and the work holding member are operated by one cylinder, the number of cylinders can be reduced, resulting in cost reduction and space saving.

[Brief explanation of the drawing]

Fig. 1 is a side view of the device of the present invention, Fig. 2 is a detailed view taken in the direction of the arrow in Fig. 1, Fig. 3 is a sectional view taken along the line shown in Fig. 2,
FIG. 4 is a sectional view taken along the line shown in FIG. 2, and FIG. 5 is a side view of the conventional device. DESCRIPTION OF SYMBOLS 1... Base plate, 2a, 2b... Support stand, 10... Support shaft, 11... Work holding member,
14...Cylinder, 15...Piston rod, 1
6... Nutacle, 17... Pin, 18... Guide elongated hole, 19... Workpiece receiving member, 20... Reference pin, 21... Recessed portion.

Claims (1)

[Scope of utility model registration request] A pair of support shafts are fixed in parallel in the vertical axis direction on a base plate provided with a workpiece support base, a workpiece holding member is supported on each support shaft so as to be horizontally rotatable, and the workpiece holding member is supported on the base plate behind the support shafts. A cylinder is fixed in the horizontal axis direction facing the support shaft side, a knuckle is fixed to the piston rod end of this cylinder, and the work holding member is connected to this knuckle via a guide elongated hole with a pin in the vertical axis direction. A workpiece receiving member is fixed to both sides of the knuckle to sandwich the workpiece in opposition to the workpiece holding member, and a reference pin for positioning is protruded from the tip of the workpiece holding member. A workpiece positioning device characterized by having a recess into which a reference pin engages.