JPH0634065Y2 - Welding head of portable spot welder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention can work with the welding head vertical.
By pulling the lever in the direction of the handle, the movable side holder part is moved substantially parallel to the stationary side holder part, so that the movable side electrode tip can be strongly pressed in the direction of the stationary side electrode tip. The present invention relates to a welding head of a portable spot welder.

[Conventional technology]

Conventionally, a welding head of a portable spot welding machine developed by the present inventor has been known (see Japanese Utility Model Publication No. 59-40150).

The welding head of this portable spot welding machine includes a stationary support plate integrally formed with a stationary side holder part to which one arm and an electrode rod can be attached, a handle integrally connected to the stationary support plate, and the other. Movable support plate integrally formed with a movable side holder part to which the arm and the electrode rod can be attached respectively, a pivot for rotatably connecting the movable support plate to the immovable support plate, and a movable support plate In a welding head of a portable spot welding machine including a lever, the stationary side holder part is formed separately from the stationary support plate, and the movable side holder part is also formed separately from the movable support plate. It is characterized in that it can be integrally combined by a connecting tool.

[Problems to be solved by the device]

In the conventional technology, the welding head is horizontal and the work is performed by operating the lever so that the lever is horizontally sandwiched in the direction of the handle so that the movable support plate becomes a stationary support plate around the pivot. Since the movable side electrode tip is pressed so as to be horizontally sandwiched in the direction of the non-moving side electrode tip, the non-moving side and movable side arms and the electrode tip are an obstacle, These did not enter the narrow window, etc., and welding around the narrow window could not be performed.

Further, in the above case, even if the stationary arm arm and the movable arm arm and the electrode tip enter the window, it is difficult to weld the periphery of the window.

Furthermore, in the conventional welding head, since the distance that the pair of electrode tips moves is not so different from the distance that the lever moves with respect to the handle, a large force is required to operate the lever. On the contrary, the pressure applied to the pair of electrode tips was small, and it was difficult to perform welding reliably.

The present invention has been made in view of the above problems of the conventional technique. The purpose of the present invention is to make the welding head vertical so that the welding operation can be facilitated, and particularly for narrow windows. Welding head of a portable spot welder that facilitates welding work around the periphery and increases the pressure of the electrode tip to ensure reliable welding without requiring a large force to operate the lever. It is the one we are trying to provide.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a stationary side holder part to which an arm having an electrode tip attached to a tip part is detachably mounted, and a stationary side to be detachably mounted to a flange of the stationary side holder part. A support board, a handle connected to the rear of the immovable support board, a movable side holder section to which a movable side arm having a tip end bent electrode tip is detachably attached, and one end of which is described above. A pair of links removably and rotatably attached to the flange of the movable side holder portion and the other end movably and rotatably attached to the immovable support board, the immovable support board and the handle. At the approximate boundary between the lever and a lever removably and pivotally attached by a pivot, one end is connected by a pin provided at the base of the lever, and the other end is a button for attaching the link to the flange. The movable side holder part is moved substantially parallel to the stationary side holder part by pulling the lever in the direction of the handle, thereby forming the movable side. Provided is a welding head for a portable spot welding machine, characterized in that the electrode tip can be strongly pressed toward the stationary side electrode tip.

Further, the connecting rod can be formed by a right-hand threaded portion, a left-handed threaded portion, and an adjusting nut screwed into these.

[Action]

When the lever is pulled in the direction of the handle, the lever rotates about the pivot in the direction of the arrow, and pulls backward the connecting rod connected by the pin provided at the base of the lever.

Here, the other end of the connecting rod is connected to the flange of the movable side holder part by a bolt, while the movable side holder part is rotatably attached to the immovable support plate by a pair of links. Therefore, when the connecting rod is pulled rearward, the movable side holder portion moves in the arrow direction substantially parallel to the stationary side holder portion.

That is, when the lever is pulled in the direction of the handle from the position indicated by the solid line to the position indicated by the phantom line, the connecting rod, the link, and the movable side holder portion move from the position indicated by the solid line to the position indicated by the phantom line. To do.

As a result, the movable chip is strongly pressed in the direction of the stationary chip.

Next, in the case where the connecting rod is formed by the right-hand thread portion and the left-hand thread portion and the adjusting nut screwed into these, by rotating the adjusting nut left and right, the opening degree of the lever handle and the movable electrode The degree of contact between the tip and the stationary electrode tip is adjusted.

〔Example〕

 Examples will be described with reference to the drawings.

In FIG. 1, the arm 2 to which the electrode tip 1 is attached at the tip is detachably attached to the stationary side holder portion 3 by a tightening screw 23.

The stationary side holder portion 3 is provided with a pair of flanges 4 and 5, and the flanges 4 and 5 have bolts 24 respectively.
The immovable support plate 6 is detachably attached by means of the nut 25 and the nut 25.

A handle 7 is provided in series behind the stationary support plate 6.

On the other hand, the movable side arm 9 to which the electrode tip 8 bent rearward at the tip is attached is detachably attached to the movable side holder part 10 by a tightening screw 26.

The movable side holder portion 10 is provided with a pair of flanges 11 and 12, and the flanges 11 and 12 have bolts 18 respectively.
One end of each of the pair of links 13 and 14 is detachably and rotatably attached by a nut 27 and a nut 27.

The other ends of the pair of links 13 and 14 are detachably and rotatably attached to the immovable support plate 6 by bolts 28 and nuts 29, respectively.

At the approximate boundary between the immovable support board 6 and the handle 7, the pivot 15
The lever 16 is removably and rotatably attached by means of a nut 30 and a nut 30.

The pin 17 provided at the base of the lever 16 has a connecting rod.
One end of 19 is connected, and the other end is the bolt for attaching the link 14 to the flange 12 of the movable side holder portion 10.
It is connected to 18.

The connecting rod 19 is formed by a right-hand threaded portion 20, a left-handed threaded portion 21, and an adjusting nut 22 screwed into these.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

By pulling the lever in the direction of the handle, the movable side holder part is moved substantially parallel to the stationary side holder part, so that the movable side electrode tip can be strongly pressed in the direction of the stationary side electrode tip. Since the welding head is vertical, it is possible to work with the welding head vertical and facilitate the welding work. Especially, when welding around a narrow window, it is possible to move inside the narrow window. Since only the side electrode tip and the movable side arm need be inserted, the welding operation can be facilitated.

Also, since the distance that the lever moves with respect to the handle is much larger than the distance that the movable electrode tip moves in the direction of the stationary electrode tip, it is not necessary to apply a large force to operate the lever. The pressure can be increased and welding can be performed reliably.

Furthermore, since the arm and holder, the holder and immovable support board, the flange and link, the link and immovable support board, the lever and handle, the connecting rod and the flange, etc. are detachably attached, some of them were damaged. In this case, only the damaged one needs to be replaced, which is economical and convenient.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a welding head of the portable spot welding machine of the present invention. 1 ... Electrode tip, 2 ... Arm, 3 ... Immovable side holder part, 4, 5 ... Flange, 6 ... Immovable support board, 7 ... Handle, 8 ... Electrode tip, 9 ... Movable side arm Ten……
Movable side holder part, 11, 12 …… Flange, 13,14 …… Link, 15 …… Axis, 16 …… Lever, 17 …… Pin, 18 …… Bolt, 19 …… Coupling rod, 20 …… Right screw Part, 21 …… Left-hand thread part, 22 …… Adjusting nut

Claims (2)

[Scope of utility model registration request] 1. A stationary side holder part (3) to which an arm (2) to which an electrode tip (1) is mounted is detachably mounted, and a flange (4) of the stationary side holder part (3). ,
An immovable support board (6) detachably attached to (5),
A handle (7) connected to the rear of the immovable support board (6),
A movable side holder part (10) to which a movable side arm (9) having an electrode tip (8) bent backward at its tip part is detachably attached, and one end of the movable side holder part (1)
A pair of links (removably and rotatably attached to the flanges (11) and (12) of (0) and the other end rotatably and detachably attached to the immovable support plate (6). 13) and (14), a lever (16) removably and rotatably attached by a pivot (15) at the approximate boundary between the immovable support plate (6) and the handle (7), and one end of the lever is A connecting rod (19) connected by a pin (17) provided at the base of the lever (16) and the other end connected by a bolt (18) for attaching the link (14) to the flange (12). And the movable side holder part (10) is moved substantially parallel to the stationary side holder part (3) by pulling the lever (16) in the direction of the handle (7). The movable side electrode tip (8)
A welding head of a portable spot welding machine, characterized in that it can be strongly pressed in the direction of the stationary electrode tip (1). 2. The connecting rod (19) is formed by a right-hand threaded portion (20), a left-handed threaded portion (21), and an adjusting nut (22) screwed into these. The welding head of the portable spot welding machine according to 1.