JP2540281Y2 - X-type welding gun with stroke adjustment device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a stopper bolt having an adjustable length for adjusting the opening stroke of the upper and lower arms, respectively, and a stopper plate contacting the stopper bolt. The present invention relates to an X-type welding gun with a stroke adjusting device.

[0002]

2. Description of the Related Art Conventionally, there is an X-type welding gun with a stroke adjusting device as shown in FIG. 2 or FIG. That is, in FIG. 2, an upper arm 22 having an electrode 21 attached to the tip thereof and a lower arm 24 having an electrode 23 attached to the tip thereof are provided on a robot (not shown). Each arm 2 is pivotally supported by a shaft 26 provided at the tip of the Dell 25.
Stopper bolts 27 and 28 whose lengths can be adjusted are disposed on the bolts 2 and 24, respectively. The cradle 25 has stopper plates 29 and 30 at positions opposed to the stopper bolts 27 and 28, respectively.
Are provided integrally. 32 is the lower arm 2
4 is a pressure cylinder fixed to the rear end of the cylinder, and a piston rod 33 of the cylinder is connected to an intermediate portion of the upper arm 22 via a link 34. And both arms 2
Open strokes 2 and 24 are the stopper bolts 2
The length of each of the protrusions 7 and 28 is adjusted.

FIG. 3 also shows a stopper bolt 27 disposed on the upper arm 22 and a lower arm 2.
4 with the stopper bolt 28
5 is in contact with the upper surface or the lower surface of a stopper plate 35 provided on the base plate 5. The opening strokes of the arms 22 and 24 correspond to the respective projecting lengths of the stopper bolts 27 and 28. It is adjusted by adjusting.

[0004]

In the above-described X-type welding gun with a stroke adjusting device, stopper bolts are arranged on the sides opposite to the stopper plate. Due to the shape of the gun arm, for example, the stopper bolt 27 cannot penetrate the arm, making it difficult to mount the stopper bolt 27, and adjusting the stopper bolt in the left-right direction (in the case of FIG. 2) or up and down (in FIG. 3). Case)
There is a problem that adjustment is troublesome because the direction is different.

The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a stopper plate on a separate member and to direct a stopper bolt. By aligning the directions,
Stopper bolts are easy to install and
It is an object of the present invention to provide an X-type welding gun with a stroke adjusting device that can simplify the stroke adjusting device.

[0006]

In order to achieve the above object, an X-type welding gun with a stroke adjusting device according to the present invention is provided with a stopper plate on one arm and the stopper plate. A stopper bolt facing the plate is arranged on the cradle, another stopper plate is provided on the cradle, and the stopper bolt facing the stopper plate is attached to the other arm. And both stopper bolts can be adjusted from the same side.

[0007]

[Function] Since the X-type welding gun with the stroke adjusting device configured as described above is used, a stopper plate is provided on one arm where the stopper bolt is difficult to penetrate, and the stopper bolt is attached. A stopper bolt is arranged on the other arm where the stopper bolt is easily penetrated, and a stopper plate is provided on the cradle to facilitate mounting of the stopper bolt. In addition, since the directing directions of both stopper bolts can be aligned, the stopper bolts can be adjusted from the same side.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. In the drawing, reference numeral 1 denotes an upper arm having an electrode 2 attached to the tip, and 3 denotes a lower arm having an electrode 4 attached to the tip.
It is. The upper and lower arms 1 and 3 are pivotally supported by a shaft 6 provided at the tip of a cradle 5 attached to the robot side (not shown), and constitute an X-type welding gun as a whole. I have.

A pressure cylinder 7 is provided at the rear end of the lower arm.
A stopper-bolt holding member 9 having a bolt hole through which the stopper bolt 8 is inserted is provided at an intermediate portion. A mounting member 11 for a link 10 is provided on the upper arm 1, and the link 10 is connected to a piston rod 12 provided on the pressurizing cylinder 7. The upper arm 1 is provided with a stopper plate holding member 14 for holding a stopper plate 13 having a curved surface.

Further, the cradle 5 is provided with a stopper holding member 16 for holding a stopper plate 15 having a curved surface at a position facing the tip of the stopper bolt 8 and the holding member. 16 is formed with a bolt hole through which a stopper bolt 17 directed to the stopper plate 13 is inserted.

Since the X-type welding gun with a stroke adjusting device having the above-described configuration is used, the welding operation is performed with both arms 1 and 3 closed as shown in FIG. ―
In order to open the systems 1 and 3, first, the pressurizing cylinder 7
The upper arm 1 is pulled by the link 10 to open upward by retracting the piston rod 12 of
The stopper plate 13 contacts the stopper bolt 17. Stopper bolt 1 of the stopper plate 13
The opening movement of the upper arm 1 is stopped by contact with the upper arm 7. When the piston rod 12 is further retracted, the lower arm 3 opens downward, and the stopper bolt 8 comes into contact with the stopper plate 15. The opening movement of the lower arm 3 is stopped by the contact of the stopper bolt 8 with the stopper plate 15. The direction in which the stopper bolt 17 abuts on the stopper plate 13 and the direction in which the stopper bolt 8 abuts on the stopper plate 15 are at right angles.

When adjusting the opening strokes of the upper and lower arms 1 and 3, for example, the opening stroke of the upper arm 1 is reduced and the opening stroke of the lower arm 3 is adjusted. In order to increase the size, the length of the protrusion of the stopper bolt 17 may be increased, and the length of the protrusion of the stopper bolt 8 may be reduced. By doing so, the stopper bolt 17
Contact position of stopper and plate 13 and stopper
Since the contact position between the bolt 8 and the stopper plate 15 is changed and the relative inclination direction is also changed, the surfaces of the stopper plates 13 and 15 with respect to the stopper bolts 17 and 8 are changed. The stopper bolt 17,
8 is always in contact with the stopper bolt 17,
8 is a curved surface that abuts the stopper plates 13 and 15 in a substantially right angle direction.

In the above embodiment, in the case of the upper arm 1 in which it is difficult to attach the stopper bolt through the stopper bolt, the arm 1 is provided with the stopper plate 13 and the stopper plate facing the stopper plate 13 is provided. Since the bolts are arranged on the cradle 5 and the stopper bolts are arranged on the lower arm 3 through which the stopper bolts can easily penetrate, and the stopper plate opposed thereto is provided on the cradle 5, Mounting of each stopper bolt becomes easy. Also both stoppers
Since the directing directions of the bolts 8 and 17 are aligned, the stopper bolts can be adjusted from the same side.

[0014]

[Effects of the Invention] Since the present invention has the above-described structure, each stopper bolt can be easily attached through an arm or a cradle, and its directing directions are aligned on the same side. Therefore, it is extremely easy to adjust the protrusion length of the stopper bolt for changing the stroke.

[Brief description of the drawings]

FIG. 1 is a side view including a partial cross section of an X-type welding gun with a stroke adjusting device according to the present invention.

FIG. 2 is a side view of a conventional X-type welding gun with a stroke adjusting device.

FIG. 3 is a side view of another conventional X-type welding gun with a stroke adjusting device.

[Explanation of symbols]

 1,3 arm 2,4 electrode 5 cradle 6 axis 8,17 stopper bolt 13,15 stopper plate

Claims (1)

(57) [Scope of request for utility model registration] 1. An X-type welding gun in which upper and lower arms having electrodes attached to respective tips are pivotally supported on a shaft provided on a cradle, and one of the arms is provided with a stopper plate. A stopper bolt facing the stopper plate is arranged on the cradle, another stopper plate is provided on the cradle, and the stopper bolt facing the stopper plate is attached to the other of the cradle. An X-type welding gun with a stroke adjusting device, wherein said X-type welding gun is arranged on an arm and said stopper bolts can be adjusted from the same side.