JPS6034463Y2 - positioning device - Google Patents

Description

[Detailed description of the invention] The present invention is based on a first movable structure that can be raised and lowered. a second locating pin;
It relates to a positioning device that can efficiently position a plate-like workpiece in which a large number of through holes with a relatively rough pitch tolerance are arranged side by side. An embodiment of the present invention will be described with reference to the drawings, taking as an example a case in which the present invention is employed in a nut welding device that transports the plate-shaped work downward after positioning and welding the nut using the device.

In the figure, a nut welding device 2 includes a welding device 4 installed on the side of a roller conveyor 3, and the welding device 4 includes a positioning device 5 according to the present invention.

The roller conveyor 3 has roller pieces 7a and 7b fixed to the inner surfaces of the side frames 6, which are disposed in parallel, with roller pieces 7a and 7b facing each other horizontally and at the same height, as shown in FIG. The roller piece 7a is provided with a protrusion 10 on its opposite end surface that can be fitted into the roller piece 7b, and the roller piece 7a is provided on the side frame 6 with a protrusion 10 that can be fitted into the roller piece 7b. , 7b, which separates the base 11.1 with a gap of more than half the width of the plate-shaped workpiece W to be carried in
2 will be installed.

Further, cylinders 14 attached to the lower surfaces of the bases 11 and 12 are respectively connected to the side frames 6, and as the cylinders 14 expand and contract, the roller pieces 7a.

The side frame 6 can be moved back and forth from a position where the parts 7b abut and fit into each other to a position where a gap g larger than the width of the plate-shaped workpiece W is provided.

The welding device 4 has electrodes 16 installed below it in accordance with the nominal size of the through hole H of the long workpiece W having a relatively coarse pitch tolerance.
It includes a movable frame 17 that can move up and down, and a positioning device 5 according to the present invention formed on the base 11.

The positioning device 5 includes the other electrodes 26, 27, which are attached to the groove 19 on the upper surface of the base 11 with their upper ends projecting.
one first positioning pin 2 inserted so as to be movable up and down in the
1, and in this embodiment, four second positioning pins 22...
- The first positioning pin 21 is provided protrudingly facing the upper electrode 16, and the first positioning pin 21 is located in one through hole H of the plate-like workpiece W.
The second positioning pin 22 is tightly fitted with the
By being formed to have a smaller diameter than the through hole H, it fits into the through hole H.

As shown in FIG. 5, the positioning pins 21 and 22 have a tapered head 23 with a spherical tip and a flange 2 at the lower end.
4 and form the first. Second positioning pin 21
．． 22 has grooves 25 formed on the top and bottom by cutting out the side ends thereof.

As shown in FIGS. 2 and 3, the electrodes 26 and 27 have a stepped hole 29 formed with a smaller diameter at the upper side, and a stepped portion 30 of the stepped hole 29 having a smaller diameter. The second locating pins 21, 22 are urged upward by a relatively weak spring 31 inserted into the lower surface of the second locating pins 21, 22, so that the flange 24 comes into contact with the second locating pins 21, 22.

Further, air intake ports 32 are opened in the electrodes 26 and 27, and the compressed air sent from the air intake ports 32 is passed through the stepped holes 29 and the first. Groove 2 of second positioning pin 21.22
Air can be blown out from around the air passage 33 formed by the air passage 5.

Note that the small diameter portion of the stepped hole 29 of the electrode 26 into which the first positioning pin 21 is attached is formed relatively small, while the stepped hole 29 of the electrode 27 into which the second positioning pin 22 is inserted is formed.
By forming the second positioning pin 22 to be relatively thick, the second positioning pin 22 can freely move back and forth in a plane.

Note that 35 and 36 are extruded pieces that can move the plate-shaped workpiece W between the roller conveyor 3 and the welding device 4 by expanding and contracting the cylinder 39 on the base 11 and 12.

However, in the nut welding device 2, the roller pieces 7at7b
In this state, the cylinder 14 is activated to bring the roller conveyor 3 into contact with the base 11, and then the cylinder 39 uses the extrusion piece 35 to transport the plate-shaped work W. is carried into the positioning device 5.

The positioning device 5 moves the first . Abuts against the second locating pin 21.22 and the pin 21.2
2 is lowered and as it rises, one through hole H at the end
By inserting the first positioning pin 21 into the hole H and inserting the second positioning pin 22 formed with a relatively small diameter into the other through hole H, the positioning can be easily performed. The first and second parts protrude upward from the through hole H.
By aligning the nut N with the positioning pins 21 and 22 and lowering the movable frame 17,
A nut N is welded around the through hole H of the plate-shaped workpiece W between the electrodes 16, 26, and 27.

Also, the electrodes 26, 27 and the first. Second locating pin 21.2
The air released from the air passage 33 between the pins 2
1.22 is cooled and the 1st. Second positioning pin 21
, 22 can be efficiently prevented from being welded to the electrodes 26, 27 or the nut N, etc.

After welding the nuts N, the extrusion piece 35 is advanced, the plate-like workpiece W is transferred onto the roller conveyor 3, and the roller conveyor 3 is positioned in the center by the cylinder 14, and the extrusion piece 35, 36 is moved laterally. Both the cylinders 14 are retracted while their movement is restricted, and the roller pieces 7a, ? By forming a gap g between b and into which the plate-shaped work W can fall, the plate-shaped work W is taken out downward.

As described above, the positioning device of the present invention can
First, a first positioning pin that can be tightly fitted into one through hole and a plurality of second positioning pins of smaller diameter that can be loosely fitted into other through holes are arranged in a vertically movable manner. When attaching a plate-shaped workpiece, by fitting one through hole to the first positioning pin in advance, it becomes easy to insert the second positioning pin into the other through hole, and the second positioning pin can be easily inserted into the other through hole. Since the second positioning pin protrudes in both directions, the positioning of, for example, the nut etc. can be easily performed using the second positioning pin.

Also, No. 1. Since the second positioning pin is formed to be able to move up and down, when inserting it, when forming the tip of the positioning pin into a spherical head, automatic insertion is possible by moving the plate-shaped workpiece laterally when installing the workpiece. Become.

Furthermore, when the second positioning pin is configured to be movable laterally within a plane as in the above embodiment, the positioning is further simplified, and the second positioning pin becomes a convenient positioning device that can be employed in various devices such as a nut welding device. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention used in a nut welding device, and FIG.
FIG. 3 is a cross-sectional view illustrating the second positioning pin, FIG. 4 is a cross-sectional view showing the function of the roller conveyor, and FIG. 5 is a perspective view showing the positioning pin in detail. be. 5...Positioning device, 11...Base,
21・Song・1st positioning pin, 22...2nd
Locating pin, H...Through hole.

Claims (1)

[Scope of utility model registration request] This is a positioning device for a plate-shaped workpiece in which a large number of through holes are arranged in parallel. A positioning device comprising: a plurality of second positioning pins that are substantially aligned with the through hole and have a diameter smaller than that of the through hole and are movably disposed therein.