JP2867234B2 - Earth side connection device for electric welding machine - Google Patents

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 electrode rods of a spot welding machine mainly used for repairing sheet metal of a vehicle.

[0002]

2. Description of the Related Art When repairing a sheet metal of a vehicle using a spot welding machine, for example, when smoothing a dent portion of a door, a paint peeling portion is formed on an edge of the door which is electrically connected to a repair position. A ground flat plate provided with an electrode mounting tube is overlaid on the peeled portion, and fixed with a small vice (for example, a vice) to clamp (clamp type ground).
After fixedly connecting the grounding electrode rod to the electrode mounting cylinder,
A washer is welded to the recessed part with the other electrode rod equipped with a washer dissolution tip at the tip, and the washer can be moved to a shaft that has a hook at the tip and a stopper at the rear end. pull with sheet metal for puller device was supported structure such as smooth, is performed by using the chip in response to such have the degree of dent.

[0003]

According to the above-mentioned ground-side fixing means in the repair work of the sheet metal of the vehicle, the ground position is limited to the edge of the door or the like because of the clamp fixing.
In addition, due to this limitation, if the distance between the repair position and the ground position is large, the painted part other than the repaired part will be discolored due to electric resistance heat between them, and after repair, the two parts at the separated position will be displaced. However, there is a drawback in that the paint must be applied over a wide area as a whole, and the aging of the paint after repair is dispersed and revealed on each painted surface, thereby deteriorating the appearance.

[0004] As another earthing means, a magnet type in which a flat surface for earthing of a body in which an electrode mounting cylinder is integrated is formed in a square tooth rack shape and a magnet lower than the tooth height is interposed between teeth. Earth is also used. According to the magnet-type ground, there is an advantage that the ground position is not limited as in the case of the clamp-type ground, but since the ground side area of the body is large, it is necessary to form a wide paint peeling surface separately from the repair surface. In addition, iron powder, etc. , which is difficult to remove, is adsorbed to the magnet between the teeth, and this heats up.
Further , there is a disadvantage that the surrounding paint is changed to cause discoloration.

The present invention solves the above-mentioned drawbacks of the conventional grounding means, can be easily and stably mounted at any position where conductivity is ensured, and reliably establishes a ground connection at the paint peeling portion on a narrow painted surface. It is an object of the present invention to provide a ground-side connection device for an electric welding machine that can be used.

[0006]

Means for Solving the Problems An electric welder second connecting terminal apparatus of the present invention, Bei abutting magnet body and the ground conductor
Ground connection device for electric welding machine
Subject with grip handle (1) at the top based on force
(2) Obstructed by the peripheral wall of the magnet holding cap on the lower left and right sides
Scraping of adsorbed powder etc. adhering to the adsorption surface without being removed
When a pair of abutting magnet bodies (3) are
In both cases, a grounding conductor is provided at the center of the main body (2).
The conductive column (4) is smaller than the attraction force of the contact magnet body (3).
Vertically with spring means that presses the ground surface with a small pressing force
The conductive column is provided so as to be movable forward and backward.
(4) Adapter for connecting one electrode of the welding machine
(5) is fixed.

[0007] The above-described ground connection device for an electric welding machine holds the device by, for example, grasping a handle (1).
When the part of the door part of the vehicle, whose paint has been peeled off as a repair surface, is used as a ground surface, and the tip of the conductive pillar (4) is brought close to the ground surface while being aligned, the main body (2) is equipped with The contact magnet body (3) is attracted to the door, and the tip of the conductive column (4) is pressed against the ground surface to be grounded.
In this case, the attracting surface of the contact magnet body (3) is
Adhered to the adsorption surface without being hindered by the peripheral wall of the cap
Because it is a flat surface from which the adsorbed powder can be scraped ,
Even if iron powder or the like is adsorbed, it can be easily removed without damaging the painted surface.
By forcibly pressing the tip of (4) to the ground surface by the pressing means, the ground connection can be reliably made.

As the pressing means, it is preferable to use a compression spring such as a compression coil spring, a leaf spring, a disc spring, or the like for the conductive column 4 in terms of structure, cost and operability. , A cam mechanism or the like can also be used.

The contact magnet body (2) can be swung with respect to the main body (2), so that it can be stably attracted and held in accordance with the degree of the flat surface and the curved surface of the attraction surface.

[0010] Furthermore, the adapter (5) is rotatably supported.
Fixed to the conductive column (4), and restricts its horizontal rotation.
This allows the insertion direction of the ground electrode to be selected.
Become so. In addition, copper, silver,
Contact with highly conductive and low hardness materials such as platinum and palladium
When used as the contact part (7), use the adapter (5).
Rotating repeatedly while pressing the conductive column (4) in the axial direction
As a result, iron powder etc. on the ground
As a result, the contact area between the contact portion (7) and the ground surface is increased.

[0011]

DETAILED DESCRIPTION OF THE INVENTION AND

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With regard to the materials, production and assembly of each part of the above-mentioned earth side connection device for an electric welding machine, those skilled in the art should select, produce and assemble materials based on current technical common sense. Although it is possible to reduce the weight and secure the strength, a typical embodiment will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an earth-side connection device for an electric welding machine according to the present invention, in which some common parts are omitted, FIG. 2 is a front view, FIG. 3 is a right side view, FIG. 4 is an explanatory view of a state of use, and shows a grip handle (1), a main body (2), a pair of abutting magnet bodies (3), and a pair of swinging parts, excluding assembly parts such as small screws and washers. It is composed of 11 parts: a shaft (38), a conductive column (4), an adapter (5), a compression spring (6), a stopper plate (41), and a column mounting bolt (42).

The main body (2) is made of stainless steel, and is formed at an intermediate position with a back member (A) having a back plate (21) and a top plate (22) which are bent in an inverted L shape in the drawing. Both sides of the bottom plate (23) have no bottom and a top plate (25) to form a magnet mounting space (24)
On the upper part of the inner top plate (26) which is overlaid on the lower surface of the top plate (22)
And a front member (B) having a rotation restricting window (27) formed on the front plate (25).

A support hole (28) on the conductive pole is fixed at the center of the top plate (22) and the inner top plate (26), and a grip handle (1) is fixed at symmetrical positions on both sides of the hole. Holes (a) for each, and a support hole (2
9) and the front plate (25) and the back plate (21) are formed with the mutual coupling hole (b) and the support hole (c) facing each other.

The grip handle (1) is made of synthetic resin,
A leg (13) formed with a blind female screw (12) for assembly corresponding to the gap between the holes (a) on the lower surface on both lower surfaces of both sides of the grip portion (11) is formed to a length that forms a grip space (14). And is fixed to the main body (2) using a handle fixing screw (d), and a back member (A) and a front member (B) constituting the main body (2).
Are connected to each other by passing the coupling screw (h) through the mutual coupling hole (b), and are fastened with the nut (i).

A pair of abutting magnet bodies (3) having the same configuration form a boss (33) at the center of the inner surface of the circular cap (32) and provide a blind female screw (34) from the top side (FIG. 2 (see the dotted line) and the magnet (35) inside the circular cap (32).
The magnet holding body (C) with its suction surface (31) flush with the circumferential wall of the circular cap (32)
And a connecting post protruding from the lower end surface of a connecting screw (37) screwed to the shaft hole (36) and the blind female screw (34) penetrating in the horizontal direction.
(D) and the connecting column (D) is
It is arranged in the magnet mounting space (24) of (2) with a washer (e) interposed therebetween, and is pivotally mounted on a swinging shaft (38) so as to be swingable.

The conductive pillar (4) is made of a copper round bar, and a contact portion (7) made of a material having high conductivity and low hardness selected from silver, platinum, palladium, etc. is brazed to the tip, and the rear end face is brazed. The female screw (43) for supporting is screwed in the axial direction, and the column mounting bolt
(42) is fixed to the supporting female screw (43) with a stopper plate (41) and a spring washer (s) interposed.The length of the conductive column (4) is The main body (2) is inserted from the top plate side of the main plate (2) into the conductive pole upper support hole (28) and the conductive column lower support hole (29), and is supported by the stopper plate (41). Are the attracting surfaces of the pair of magnets (3).
(31) The length protrudes downward (see (k) in FIG. 2).

The adapter (5) is connected to the tip of an electrode holding tube (51) in which the electrode rod is fixed with the mounting screw (f) so as to be in close contact with the peripheral surface of the conductive column (4). The conductor (52) is formed, and the rotation restricting window of the front plate (25) of the main body (2) is formed.
With the electrode holding tube (51) projecting horizontally from (27),
The connecting conductor (52) is fixed to the conductive column (4) with small screws (g), and the conductive column (4) is rotated by the horizontal turning operation of the adapter (5) within the range of the rotation restricting window (27). It is supposed to. Then, the fixed connection conductor (52) and the inner top plate (2
Compression spring (6) consisting of coil on conductive column (4) between
Is mounted so that the conductive column (4) is always urged toward the tip.

In the embodiment described as an embodiment of the present invention, a compression spring is used as a means for pressing the conductive column (4), but a leaf spring, a disc spring, and a screw motion mechanism are adopted. Can also achieve the effects of the invention described below.

Although the metal is used as the material of the main body (2), it may be formed by using a heat-resistant synthetic resin.

For example, as shown in FIG. 4, the above-mentioned earth side connection device for an electric welding machine holds the device by gripping a handle (1), and as a repair surface, a door of a vehicle which has already been peeled of paint as a repair surface. When a part of the portion is used as a ground surface and the tip of the conductive pillar (4) is brought close to the ground surface while being aligned,
The contact magnet body (3) mounted on the main body (2) is attracted to the door and the tip of the conductive pole (4) is pressed against the ground surface, so it is connected to the spot welding machine body (W). The other electrode rod (E1) is inserted into the electrode holding cylinder (51) of the adapter (5) and fixed with the mounting screw (f) to be grounded. Therefore, in order to repair the dent (J), etc., the washer (w) is applied to the dent using the other electrode rod (E2) equipped with a washer-dissolving tip (T) at the tip as in the past. This washer is welded (w), and a hammer is movably supported on a shaft having a hook at a front end and a stopper at a rear end (not shown).
This is done by using a chip according to the degree of the dent, such as drawing out and smoothing using a chip.

[0022]

As described above, the earth side connection device for an electric welding machine according to the present invention has a grip handle (1)
At the left and right of the lower part of the main body (2) provided with a magnet, a contact magnet body (3) having a flat adsorption surface is provided, and a conductive column (4) made of a conductive member is To allow the ground surface to move forward and backward so as to press it, and the conductive column (4)
Since the adapter (5) that connects one electrode of the welding machine is fixed, it can be handled by holding the grip handle (1), and a part of the part where paint has already been peeled off as a repair surface It can be used as a grounding surface, and the grounding position is not limited to the edge of the door, as in the past. The ground connection can be made using the narrow area of the portion.

Further, when the tip of the conductive pillar (4) is brought close to the ground surface while being aligned, the contact magnet body (3) mounted on the main body (2) is attracted to the door, and the conductive pillar (4) is attracted. ), The tip is strongly pressed against the ground surface by the pressing means, so that the ground connection can be ensured and the suction holding of the device can be made safe. In particular, the contact magnet
Since the adsorption surface of (3) is smooth, even if iron powder etc. is adsorbed, it can be easily removed by means such as wiping, so the painted surface on which the contact magnet body (3) is adsorbed To iron
Does not scratch with powder .

As the pressing means, a compression coil spring,
It is structurally simple to use a compression spring such as a leaf spring, a disc spring, etc., the cost is low and the magnet body for contact (3)
Due to the spring force that resists the push-up of the conductive column (4) due to the suction of the tip, the tip is strongly pressed against the ground surface without particularly manual operation, and a reliable ground connection can be made. In the case of using a screw motion mechanism, a cam mechanism, and the like, a separate operation is required, but the object of the invention can be sufficiently achieved, and a strong and weak pressure adjustment can be performed as necessary. be able to.

According to the second aspect of the present invention, by providing the contact magnet body (2) swingably with respect to the main body (2),
The grounding state can be secured by stably holding the device in accordance with the degree of the flat surface and the curved surface of the suction surface.

According to a third aspect of the present invention, the adapter (5) is fixed to the rotatably supported conductive column (4).
By restricting the horizontal rotation of the
The degree of freedom in selecting the insertion direction of the pole can be ensured. In addition ,
Connect copper, silver, platinum, palladium, etc. to the tip of the telephone pole (4).
Use a material with high electrical conductivity and low hardness as the contact part (7)
In this case, the conductive column (4) is axially
By repeatedly turning while pressing, the ground surface
Iron powder etc. is pushed into the material of the contact part (7).
As a result, the contact area between the contact portion (7) and the ground plane is increased, and the ground connection with low contact resistance can be secured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an earth-side connection device for an electric welding machine according to the present invention, in which some common parts are omitted.

FIG. 2 is a front view of an assembled state of the apparatus.

FIG. 3 is a right side view of an assembled state of the device.

FIG. 4 is an explanatory diagram schematically showing a use state of the device.

[Explanation of symbols]

 (1) Gripping handle (2) Main body (27) Rotation restricting window (28) Support hole above conductive pole (29) Support hole below conductive pole (3) Magnet for contact (31) Attraction surface (35) Magnet ( 38) Swing shaft (4) Conductive pole (41) Stopper plate (5) Adapter (51) Electrode holding cylinder (6) Compression spring (7) Contact part

Claims (3)

(57) [Claims] An abutting magnet body and a grounding conductor.
Earth side connection device for electric welding machine.
Reference (2) with grip handle (1) on top
The lower left and right, are inhibited in the peripheral wall of the cap for the magnet holding
Of the adsorbed powder adhering to the adsorption surface without
With a pair of abutting magnet bodies (3)
In the center of the main body (2), a conductor,
Make the utility pole (4) smaller than the attraction force of the contact magnet body (3).
Vertically with spring means that presses the ground surface by pressing force
An earth connection device for an electric welding machine, characterized in that an adapter (5) for connecting one electrode of a welding machine is fixed to the conductive column (4) so as to be movable back and forth . 2. The ground connection device for an electric welding machine according to claim 1, wherein the contact magnet body (2) is swingable with respect to the main body (2). 3. A conductive column (4) is rotatably supported, and
Provide horizontal rotation of the fixed adapter (5) on the main body (2).
3. The earth-side connection device for an electric welding machine according to claim 1 , wherein the rotation-restricting window (27) restricts the rotation .