JPH1133732A - Earth side splicing equipment for electric welder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the earth side splicing equipment for the electric welder which has the following merits: the contacting plane for the earth is kept in smallest area possible and can be installed at the optional position easily and stably and preventing high temperature and discoloration of painting at the vicinity area. SOLUTION: The welding chip 33 located at the edge of one temporary welding rod 3 is welded temporarily to the earth plane resisting to the reactionary force of the compression spring 4. By this, the multiple earth points 13 of equipment body 1 which surrounds the temporary welding rod 3 and composed of the combined conductive member in insulated condition are pressed tightly with the aide of the compression spring 4 to the earth plane. The earth for the electric welder is connected and the repair and processing work to an area where the repair is to be conducted on a vehicle and the like is carried out smoothly with the electrode at the other side of the electric welder. Thus the selection of setting position of the earth part is diversified, the painting peeling area and the earth trace is made smaller and still the earth is taken surely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for connecting a ground side of a pair of electrodes of a spot welding machine mainly used for repairing a sheet metal of a vehicle.

[0002]

2. Description of the Related Art Conventionally, when repairing a sheet metal of a vehicle using a spot welder, connection of an electrode on the ground side is electrically connected to a repair position when, for example, a concave portion of a door is smoothed. A paint peeling surface (hereinafter, referred to as a ground surface) is formed on the edge of the door, and a ground connection plate provided with an electrode mounting tube is brought into close contact with the paint release surface, so that the ground connection plate and the door can be reduced in size. A means for clamping and fixing (clamp-type grounding) by a force (for example, a vise) and connecting and fixing an electrode rod on the ground side to the electrode mounting cylinder, and a flat grounding surface of a body integrally provided with the electrode mounting cylinder Means are provided in which a magnet is provided so as to be depressed from the surface, a ground flat surface is magnetically fixed to the ground surface so as to be conductive by magnetic force, and a ground electrode rod is connected and fixed to the electrode mounting tube. I have.

[0003]

When the former clamp fixing means is used as the ground fixing means in the above-mentioned sheet metal repair processing of a vehicle, the ground surface is limited to the edge of the door or the like. Due to the limitation, if the distance between the repair position and the ground plane is large, the painted part other than the repaired part will be discolored due to the electric resistance heat between them. There is a drawback in that the paint must be applied over a large area, and the aging of the paint after repair is dispersed and manifested on each painted surface, thereby deteriorating the appearance.

In the case of employing the latter fixing means using a magnet, there is an advantage that the ground surface is not limited to the edge of the door or the like, as compared with the former clamping type fixing means on the ground side. In the case of close contact with the side surface, since the magnetic force is weak against the force in the direction of gravity, it is necessary to magnetize the magnet by supporting the gravity by recessing the ground surface of the body, and removing it from the magnet However, there are drawbacks such as the fact that iron powder or the like, which is difficult to form, is adsorbed and heats up, or the surrounding paint is affected to cause discoloration.

The present invention eliminates the disadvantages of the above-mentioned conventional grounding means, and allows the grounding contact surface to be accommodated in an area as small as possible and to be easily and stably mounted at an arbitrary position. It is an object of the present invention to provide a ground-side connection device for an electric welding machine, which can achieve prevention of discoloration of surrounding paint.

[0006]

SUMMARY OF THE INVENTION The present invention has been accomplished to solve the above-mentioned problems, and the construction of the earth side connection device for an electric welding machine is used for repairing a sheet metal part of a vehicle. A mounting hole (12) for a temporary welding rod is penetrated in the longitudinal direction of the center of a columnar substrate (11) made of a conductive member having one or several kinds of electrode connection means, and the mounting hole for the temporary welding rod (12). A device body (1) having a plurality of grounding contacts (13) protruding around one end opening of (12), and a temporary welding rod mounting hole (12) of the device body (1).
An insulating sleeve (2) fitted and fixed to the other end opening side of the, and a temporary welding separation means provided on the head (31), for penetrating the compression coil spring (4) and the insulating sleeve (2) for a temporary welding rod A temporary welding rod (3) held so as to protrude toward the one end opening side of the mounting hole (12) against the compression coil spring (4).
The head (31) of (3) is pressed with one electrode tip of the electric welding machine to temporarily weld the tip to the ground surface, and the ground contact (13) is pressed and adhered to the ground surface. It is characterized by.

The electrode connecting means in the above configuration is a round bar arm projecting and fixed to the columnar base (11) of the apparatus main body (1) so as to correspond to the arm mounted on the tip of the electrode.
(14), one or three types of flat arms (15) and socket arms (16), and the temporary welding rod (3) is temporarily fixed to the head (31) of the temporary welding rod (3). Is provided with a structure for applying a torsional force by a spanner tool or the like or a rotary operation lever (17) as means for separating the torsional force by a torsional force.

[0008]

The above-described earth-side connection device for an electric welding machine according to the present invention is a device for a vehicle in which the electrode rod on the earth side of the welding machine is attached to an electrode mounting body via an adapter, and the coating is removed in advance. Position near the repair surface After a plurality of ground contacts (13) protruding from one end surface of the equipment main body (1) are brought into contact with a part of the ground surface of the vehicle, The head (31) of the temporary welding rod (3) is pressed in the axial direction against the compression coil spring (4) with an electrode rod of the above or with a conductive tip held via an adapter, thereby temporarily welding the temporary welding rod (3). ) Is temporarily welded to the ground surface, so that the pressing force and the resilient force of the compression coil spring (4) reduce the columnar base (11) and the ground contact.
(13) acts on the ground surface, and the ground contact (13) is pressed against and adheres to the ground surface to perform the ground function, and the tip of the temporary welding rod (3) is connected to the ground surface of the vehicle. As a result of the temporary welding, the contact point of the grounding contact (13) is maintained in a pressed state, and a reliable ground connection function is provided during the repair work of the vehicle using an electric welding machine (spot welding machine). Will be maintained. When the welding rod is temporarily welded, the welding is performed in a state where the other electrode of the electric welding machine is in contact with a part of the repair surface of the vehicle.

A mounting hole (12) for a temporary welding rod of the columnar substrate (11).
Around the one end opening, a plurality of grounding contacts (13) are protruded, and the center portion can be welded and fixed to the grounding surface, so that all these grounding contacts (13) are not pressed and adhered. In addition, when the ground surface can be reliably taken, and when three or more ground contacts (13) are provided so as to form a regular polygonal shape, the ground surface that is in a conductive state with the repair surface is inclined ( (Including vertical), and even if the ground surface is not flat, multiple ground contacts
(13) can be in contact with any of the
The grounding state is secured without inadvertent separation due to the gravity of the device or the pulling force of the cord, and the repair work such as the dent of the sheet metal portion of the vehicle can be continuously and exclusively performed. The workability can be improved.

According to the second aspect of the present invention, as the electrode connecting means, a round bar arm (14), a flat arm (15), and a socket arm (15), which are extended and fixed to the columnar substrate (11) of the apparatus main body (1). By providing one or three types of 16), it can be used corresponding to various electrode forms, so there is no need to use an optional electrode, and it is possible to use an electrode equipped in an existing electric welding machine. It can be connected and is economical.

According to a third aspect of the present invention, a temporary welding rod is provided by providing a means for applying a torsional force using a spanner tool or the like or a rotary operating lever (17) as the temporary welding separating means.
(3) Since the torsional force can be easily applied to the welded portion to facilitate the separation of the temporary welding, the separation of the earth side connection device for the electric welding machine after the work is completed, and the deep welding No scars are formed, the post-processing is easy, and the ground portion can be made smooth.

Therefore, according to the apparatus of the present invention, the ground surface formed by peeling off the coating can be made as small as possible, so that the post-repair can be simplified, and it can be easily and stably mounted at an arbitrary position. In addition, it is possible to provide an earth-side connection device for an electric welding machine capable of achieving prevention of high heat and prevention of discoloration of surrounding paint.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The earth side connection device for an electric welding machine according to the present invention comprises a temporary welding rod (3) and a compression coil spring.
By temporarily welding to the ground surface against the resilience of (4), a plurality of conductive members provided around the temporary welding rod (3) and consisting of conductive members joined in an insulating state The contact for grounding (13) is pressed and adhered to the grounding surface using the force of the compression coil spring (4), the grounding side for the electric welding machine is connected, and the electrode on the other side of the electric welding machine is used to connect the vehicle to the ground. To facilitate the repair work on the surface to be repaired, diversify the selection of the setting position of the ground part, narrow the ground surface and reduce the trace of ground, so that reliable grounding can be obtained. There is a characteristic in that

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in a partially cutaway front view of FIG. 1, a plan view of FIG. 2, and a bottom view of FIG. The main body of the device (1) consisting of a member and having a mounting hole (12) for a temporary welding rod at the center
An insulating sleeve (2) attached to the welding hole, a temporary welding rod (3) penetrating through the insulating sleeve (2) and inserted into the temporary welding rod mounting hole (12); And a compression coil spring (4) mounted on the welding rod (3).

The device main body (1) has a diameter of 50 made of steel.
mounting hole for a temporary welding rod of a diameter into which the insulating sleeve (2) is fitted in the axial direction at the center of a columnar substrate (11) having a height of 60 mm and a height of 60 mm.
(12) is penetrated, and the body of the columnar substrate (11) has a first electrode connecting arm (round bar arm (14)) with a circular cross section, also made of steel. A flat second electrode connection arm (flat arm (15)) is attached by screwing means, extends 45 mm in the horizontal direction from the surface of the body, and is further provided on the bottom surface of the columnar substrate (11). Six (6) earthing contacts (13) using silver material and forming a grounding plane (18) with a diameter of 10 mm on the same center line around the mounting hole (12) for the temporary welding rod are equiangularly spaced. It is attached and fixed and protrudes about 2 mm.

As the electrode connecting means, a cylindrical third electrode arm (socket arm (16)) into which an electrode can be inserted and fixed may be provided side by side or in place of any one of the above-mentioned electrode connecting arms.

The insulating sleeve (2) has a temporary welding rod at the center.
(3) is a Duracon part integrally formed with a fitting cylinder portion (22) provided with a support hole (21) having a slidable bore and a flange portion (23), and the fitting cylinder portion (22) From the upper surface of the apparatus main body (1) and fitted into a mounting hole (12) for a temporary welding rod.

Further, the temporary welding rod (3) is made of a brass temporary welding rod main body (36) and an iron member which is screwed to the distal end of the temporary welding rod main body (36). And a welding tip (32) formed with a retaining flange (33) and a rotary operation lever (17) integrally connected or integrally formed at the rear end of the temporary welding rod main body (36). A head (31) having a hexagonal cross section and having a pressing depression (34) formed on the upper end surface thereof, and the temporary welding rod main body (36) is attached to the jaw (35) of the head (31). ) And the surface of the flange (23) of the insulating sleeve (2), with the compression coil spring (4) being interposed in a state of being compressed, passing through the support hole (21) of the insulating sleeve (2). Mounting hole for temporary welding rod (12)
After that, the welding tip (32) is screwed and connected to the apparatus main body (1).

A welding tip (32) at the tip of the temporary welding rod (3)
Is worn or worn out by repeated use,
It is preferable that only the welding tip (32) be replaceable, as a configuration in which the screw is capable of transmitting rotation using an inexpensive conductive member, and is connected to the temporary welding rod main body (36) by a fitting means or the like. In some cases, the members constitute the temporary welding rod (3).

In the above embodiment, the head of the temporary welding rod (3) is used.
(31) is made hexagonal and provided with a rotation operation lever (17), and the operation with the rotation operation lever (17) allows the provisional welding rod (3) to be operated.
If the welding cannot be removed, the head (31) can be used with a tool such as a spanner.However, the rotation operation lever (17) is passed through the head (31), For example, in the case where the length can be changed, only one of them may be used.

Further, as a material of the ground contact (13),
A suitable material commonly used, such as brass or nickel silver, may be used.

Furthermore, in place of the compression coil spring (4), a bellows-shaped pipe or the like in which a compression coil spring member is inserted is used to prevent entry of iron powder or the like into the slide portion.
The fingertip may be prevented from being pinched.

The above-mentioned earth side connection device for an electric welding machine attaches an electrode rod on the earth side of the welding machine to an electrode mounting body via an adapter, and closes a part of the vehicle near a repaired surface of the vehicle in which paint has been peeled off in advance. After a plurality of grounding contacts (13) projecting from one end face of the device main body (1) are brought into contact with the surface, it is held directly by an electrode rod on the ground side of the welding machine or via an adapter. Of the temporary welding rod (3)
(31) is pressed in the axial direction against the compression coil spring (4) to temporarily weld the tip of the temporary welding rod (3) to the ground surface, whereby the pressing force and the elastic force of the compression coil spring (4) are applied. Is a columnar substrate
(11) and acts on the ground plane via the ground contact (13),
The grounding contact (13) is used so as to be pressed against and adhered to the grounding surface to perform the function of the ground, and thereafter, for example, the repair of the dent portion or the like is performed in the same manner as in the conventional repair means. Corresponds to a so-called stud puller tool or a large number of draw-out fittings, in which a drawer such as a washer or a corrugated metal wire is welded to the dent, etc. Using a pull puller device (not shown) supporting the hook
Repair work to pull out and smooth out the dents while correcting them with a hammer or the like.

After the vehicle has been repaired by the spot welding machine, the temporary welding rod (3) can be used to remove the earth side connection device for an electric welding machine from the repaired surface.
The spot welding portion of the temporary welding is removed by applying a twisting force to the spot welding.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a ground connection device for an electric welding machine according to an embodiment of the present invention.

FIG. 2 is a plan view of an earth-side connection device for an electric welding machine according to an embodiment of the present invention.

FIG. 3 is a bottom view of the ground connection device for the electric welding machine according to the embodiment of the present invention.

[Explanation of symbols]

 (1) Equipment main body (11) Columnar base (12) Mounting hole for temporary welding rod (13) Ground contact (14) Round rod arm (15) Flat arm (16) Socket arm (17) Rotating lever (18) ) Ground plane (2) Insulation sleeve (21) Support hole (22) Fitting cylinder (23) Flange (3) Temporary welding rod (31) Head (32) Welding tip (33) Retaining flange (34) ) Pressing depression (35) Jaw (36) Temporary welding rod (4) Compression coil spring

Claims (3)

[Claims] 1. A temporary welding rod for use in repairing a sheet metal part of a vehicle, wherein the temporary welding rod is provided in a longitudinal direction of a central portion of a columnar substrate (11) comprising a conductive member having one or several kinds of electrode connection means. Mounting hole (12) for the temporary welding rod
A main body (1) having a plurality of grounding contacts (13) protruding around one end of the main body, and a mounting hole for a temporary welding rod of the main body (1).
Insulation sleeve (2) fitted and fixed to the other opening side of (12)
And a compression coil spring having a temporary welding separation means on the head (31).
(4) and the insulation sleeve (2)
(12) and a temporary welding rod (3) held so as to protrude against one end of the compression coil spring (4), and the head (31) of the temporary welding rod (3) is electrically welded. A ground-side connection device for an electric welding machine, characterized in that one electrode tip of the welding machine is pressed to temporarily weld the tip to the ground surface, and the ground contact (13) is pressed and adhered to the ground surface. . 2. A rod arm (14), a flat arm (1) extended and fixed to a columnar substrate (11) of an apparatus main body (1) as an electrode connecting means.
5) The earth-side connection device for an electric welding machine according to claim 1, comprising one or three kinds of socket arms (16). 3. The earth-side connection device for an electric welding machine according to claim 1, wherein the temporary welding separating means is configured to apply a torsional force with a wrench tool or the like or a rotation operation lever (17).