JPH062021Y2 - Welding nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a welding nut for welding a nut to a target object such as a steel plate by arc stud welding means.

(Prior Art) In the prior art, as disclosed in Japanese Patent Laid-Open No. 60-118387, a small ring is projected all around the welding surface of the nut, and a core rod made of heat-resistant porcelain is passed through the screw hole. The nut is arc-welded while the nut is bitten by the arc stud welding gun and the arc is rotated around the entire circumference of the welding surface along the ring to prevent spatter from entering the screw hole by the core rod. However, when welding this kind of nut, a core rod made of heat-resistant porcelain must be used without fail, and the handling thereof is troublesome.

(Technical problem) Therefore, the present invention has been made in view of the drawbacks of the prior art, and it is a technical problem to enable a nut to be smoothly welded without complicated labor. Is.

(Technical Means) In the present invention, in order to solve the above technical problem, an insulating component is preliminarily caulked with a part of the nut body to prevent spatter from entering the screw hole during arc welding. is there.

Specifically, it has the following configuration as shown in the drawing.

Reference numeral 1 denotes a steel nut body having a through screw hole 2 formed therein. 3 is a welding surface 4 side of the nut body 1 and is a caulking portion formed on the lower opening edge portion 5 of the through screw hole 2 and is formed from an annular caulking receiving recess 6 and a thin annular caulking piece portion 7. is there. still,
Of course, the crimping piece 7 may be divided into crimping claws.

Reference numeral 8 denotes a tubular insulating component having a collar portion 9, in which a portion of the tubular portion 10 is provided with notches 11 at a plurality of portions. Reference numeral 12 is a separating piece, which is separated from the cutout portion 11. 1
Reference numeral 3 denotes an annular electrode welded portion projectingly provided on the welding surface 4 of the nut body 1 and is arc-welded to a target object 14 such as a steel plate as a base material.

The above-mentioned insulating component 8 is made of synthetic resin such as nylon or phenol resin. Reference numeral 15 is a through hole formed in the target object 14 so that the insulating component 8 can be inserted therethrough. Thus, the insulating component 8 prevents spatter from entering the through screw hole 2 during arc welding of the nut body 1 and also has a function as a guide for positioning the nut body 1 to the target object 14. .

Reference numeral 16 is a push rod of an arc stud welding gun.

(Operation) The above technical means operates as follows.

First, after the collar portion 9 of the insulating component 8 is fitted into the caulking receiving recess 6 of the caulking portion 3 of the nut body 1, the caulking piece portion 7 is caulked to integrally attach the insulating component 8 to the nut body 1. Fit and fix to.

After that, as shown in FIG. 3, the insulating component 8 is used as a guide to loosely fit into the through hole 15 of the target object 14, and then an arc stud welding gun (not shown) is used to arc through the electrode welding portion 13. Welding is performed to weld the nut body 1 to the target object 14 as shown in FIG.

After that, the push rod 16 may be pushed downward to separate the separation piece 12 from the notch 11.

During this arc welding, the arc goes around the annular electrode welded portion 13, and the spatter does not enter the through screw hole 2 due to the presence of the insulating component.

(Effects) Since the present invention has the above-described configuration and operation, it has the following unique effects.

(A) The flange portion 9 of the insulating component 8 is attached to the crimp portion 3 of the nut body 1.
Since the nut body 1 and the insulating component 8 are integrally fitted and fixed, the insulating component 8 exerts a guide function to smoothly position the nut body 1 to the target object 14. obtain.

(B) It is possible to prevent spatter from entering the through screw hole 2 during arc welding.

(C) Since the notch 11 is provided in a part of the insulating component 8, the separation piece 12 after welding the nut body 1 can be easily separated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the product of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a longitudinal side view of the same, showing a state of positioning to a target object, and FIG. FIG. 5 is a perspective view showing the upper side, and FIG. 5 is a vertical cross-sectional side view showing a state where the present invention product is welded to a target object and then the separation piece is separated. DESCRIPTION OF SYMBOLS 1 ... Nut main body, 7 ... Caulking piece part 8 ... Insulating part, 12 ... Separation piece 13 ... Electrode welding part

Claims (1)

[Scope of utility model registration request] 1. An electrode welded portion 13 is projected from a welded surface 4 of a nut body 1 having a through screw hole 2, and the electrode welded portion 1 is also provided.
In the inner position of 3, the caulking receiving recess 6 and the caulking piece 7
A notch which forms a caulking part 3 consisting of and has a tubular shape with one end closed and a collar part 9 at the other end and which is capable of separating the separation piece 12 on the one end side closed in the middle part. An insulating component 8 having a reference numeral 11 is provided, and a flange portion 9 of the insulating component 8 is fitted and fixed to the caulking portion 3 of the nut body. The insulating component 8 is loosely inserted into the through hole 15 of the object 14 to be welded. A welding nut that can be fitted.