JPH09136164A - Stud welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bolt from flying out and dropping down by making a stopper member in contact with a projecting end of the bolt until holding the bolt with a collet guide and moving with turning with an action rod to the avoiding position during welding. SOLUTION: A bolt 5 supplied from a feeder 3 and received with a receiver 2 is pushed and moved with a collet moving on a forward and backward shaft, and the end part of the bolt is held with a collet guide 4. A stopper member action rod 9 is advanced with a cylinder built-in a stud welding equipment body 1 and the stopper member 6 is held with turning so that the contact face 6a is positioned on the forth side of the collet guide 4. By making the end of the bolt 5 in contact with the contact face 6a and restricting, the bolt 5 can be prevented from flying out from the collet guide 4. When welding, the stopper member action rod 9 is moved backward, the contact face 6a is turned and moved to the avoiding position with a hinge 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stud welding device for arc welding by pressing the tip of a bolt against a work.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional stud welding apparatus for arc welding by pressurizing the tip of a bolt onto a work is shown in FIG.
A receiver 2 that receives a bolt 5 supplied by a feeder 3 to the stud welding apparatus main body 1 in a constant axial direction,
The receiver 5 includes a collet guide 4 that pushes the bolt 5 received by the receiver 2 by a collet (not shown) that moves forward and backward, and holds the end of the bolt 5 in a partially projected state.

[0003]

In the above-mentioned conventional apparatus, since the bolt 5 which is gripped by the collet guide 4 and whose end portion is partially projected is pressed against the work to perform arc welding, the collet guide is generated by the heat generated at the continuous welding point. When the flange formed on the bolt 5 passes through the collet guide 4, the spring force of 4 is reduced due to the heat effect, so that the bolt 5 cannot be gripped sufficiently, and the bolt 5 jumps out of the collet guide 4 and falls. There was a problem that the line was stopped due to poor mounting.

In view of the above conventional problems, an object of the present invention is to
This is to prevent the bolt from jumping out from the collet guide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the structure of the present invention has a receiver for receiving a bolt supplied by a feeder in a constant axial direction and an axial movement of the bolt received by the receiver. In a stud welding device including a collet guide that is pushed by a collet and holds the end of the bolt in a partially projected state, in a stud welding device main body, the protruding end of the bolt abuts at the front position of the collet guide. A stopper member having a contact surface for pivoting at a front position of the collet guide and a retracted position separated from the front position, and a stopper member for preventing the bolt from popping out; and until the bolt is gripped by the collet guide, The contact surface of the stopper member is pivotally held at a position in front of the collet guide, and moves backward when the bolt is welded to move the stopper member. It is obtained by a stopper member actuating rod for pivoting to the retracted position.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a stud welding apparatus main body (arc stud welding gun), which is a receiver 2 that receives a bolt 5 supplied by a feeder 3 in a constant axial direction, and a forward / backward movement of the bolt 5 received by the receiver 2. Push it with a collet (not shown)
Collet guide 4 which holds the end of the part in a partially protruding state
It is composed of

The present invention provides the above-mentioned stud welding apparatus body 1,
A front surface of the collet guide 4 has a surface 6a against which the projecting end of the bolt 5 abuts, and the bolt is prevented from jumping out so as to be pivotable between a front position of the collet guide 4 and a retracted position separated from the front position. The stopper member 6 and the bolt 5 hold the contact surface 6a of the stopper member 6 at the front position of the collet guide 4 until the bolt 5 is gripped by the collet guide 4, and move backward when the bolt 5 is welded. A stopper member operating rod 9 for rotating the stopper member 6 to the retracted position is provided.

The stopper member 6 is rotatably supported via a hinge 8 on a support plate 7 projecting from the stud welding apparatus main body 1 in an axial direction parallel to the collet guide 4, and has a contact surface as shown in FIG. 6a pivots to the front position of the collet guide 4 and the retracted position rotated by 180 ° as shown in FIG.

The turning movement of the stopper member 6 is such that the spring 8 is bridged between the support plate 7 and the stopper member 6 with the hinge 8 as the center, and the stopper member 6 is always biased toward the retracted position. The stopper member 6 may be rotated downward by its own weight without using the spring 10.

Although not shown, the stopper member operating rod 9 is adapted to be moved forward and backward along the lower surface of the support plate 7 by a cylinder incorporated in the stud welding apparatus body 1. The forward / backward movement of the stopper member operating rod 9 is performed by pushing the bolt 5 received by the receiver 2 by a collet (not shown) for axially moving forward / backward, and the end portion of the bolt 5 partially projects from the collet guide 4 to cause the stopper member. 6 until it contacts the contact surface 6a of the stopper 6, and after the end of the bolt 5 contacts the contact surface 6a of the stopper member 6, it moves backward as shown in FIG. Move to the edge.

Since the present invention has the above-mentioned structure, the receiver 5 receives the bolt 5 supplied by the feeder 3 in a constant axial direction, and the bolt 5 received by the receiver 2 is pushed by the collet that moves forward and backward. Then, the collet guide 4 grips the bolt 5 with the end of the bolt 5 partially protruding. At this time, the stopper member operating rod 9 is moved to the forward end along the lower surface of the support plate 7 by the cylinder (not shown) built in the stud welding apparatus body 1.
The contact surface 6a of the stopper member 6 has a collet guide 4
It swings and holds so that it is located in front of.

As a result, the end of the bolt 5 gripped by the collet guide 4 contacts the contact surface 6a of the stopper member 6 and is regulated. Therefore, the bolt 5 is prevented from jumping out of the collet guide 4 even if the spring force of the collet guide 4 is reduced due to heat due to the heat generated at the continuous welding point of the arc welding.

The bolt 5 held by the collet guide 4
2 is contacted with the contact surface 6a of the stopper member 6 and regulated, the stopper member actuating rod 9 is moved to the retracted end so that the contact surface 6a of the stopper member 6 is moved to the collet guide 4 as shown in FIG. It turns to a retracted position separated from the front position, presses the bolt 5 gripped by the collet guide 4 shown in FIG.

The stopper member 6 pivoted to the retracted position waits until the next bolt 5 is gripped by the collet guide 4.

[0015]

As described above, according to the present invention, the bolt held by the collet guide is prevented from jumping out of the collet guide by the stopper member, so that the problem of line stop due to improper mounting is eliminated. Further, even if the spring force of the collet guide is reduced due to heat, the stopper member prevents the bolt from jumping out and falling, so that the replacement period of the collet guide is extended, and the maintenance man-hours and running costs are reduced. Further, in the past, the bolt that jumped out and dropped was discarded without being reused, but since this is eliminated, the loss of the bolt can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a device of the present invention in a state in which a bolt is prevented from jumping out and falling.

FIG. 2 is a side view of a main part of the device of the present invention in a standby state.

FIG. 3 is a side view of a main part of a conventional device.

[Explanation of symbols]

 1 Stud Welding Machine Main Body 2 Receiver 3 Feeder 4 Collet Guide 5 Bolt 6 Stopper Member 6a Abutment Surface 7 Support Plate 8 Hinge 9 Stopper Member Operating Rod 10 Spring

Claims (1)

[Claims] 1. A receiver for receiving a bolt supplied by a feeder in a constant axial direction, and a bolt received by the receiver is pushed by a collet for axially moving back and forth, and the end portion of the bolt is gripped in a partially projected state. In the stud welding device including the collet guide, the stud welding device main body has a contact surface with which the protruding end of the bolt abuts at the front position of the collet guide, and the front position of the collet guide and the front position of the collet guide. A stopper member for pivoting out, which is pivotally provided at a separated retracted position, and pivotally holds the contact surface of the stopper member at a position in front of the collet guide until the bolt is gripped by the collet guide. When welding the bolt, a stopper member operating rod that moves backward to pivot the stopper member to the retracted position is provided. Stud welding device according to claim.