JP2567544B2 - Work table for spot welders - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table for a spot welding machine.

[0002]

2. Description of the Related Art In a conventional work table used in a spot welding machine, a table plate on which a work is placed is generally fixed to a leg. That is, it is common that the table plate surface is fixed to the upper ends of the legs while being kept horizontal, and the vertical positioning is not possible.

[0003]

However, in such a conventional structure, it is required that the work table be moved so as not to get in the way due to the shape of the work at the time of spot welding of small articles or boxes. However, it is difficult to move the work table.

Further, when working with a differently shaped tip or depending on the shape of the work, it is required to move the work table up and down, but there is a problem that the height cannot be adjusted.

[0005]

In view of the above-mentioned conventional problems, the present invention provides a work table for supporting a work to be welded by upper and lower electrodes in a spot welding machine, in which both left and right sides of the electrode are supported. The left and right legs arranged at the same time are provided so as to be vertically expandable and contractible, and the left and right table plates supported on the upper parts of the left and right legs are provided separately from each other, and the left and right table plates support the work. The horizontal position and the substantially vertical position retracted from the lateral position of the electrode when not in use are individually rotatable.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the spot welding machine 1 is provided with a column 5 standing upright on the upper surface of a base 3 and front and rear directions (horizontal direction in FIG. 1) at upper and lower portions of the column 5. A substantially C-shaped frame 9 composed of an upper frame 7U and a lower frame 7D that are extended to be provided is provided.

An upper holder 11 is vertically movable below the front portion of the upper frame 7U. That is, the guide bar (not shown) provided on the upper frame 7U is provided with the guide bar 13 so as to be vertically movable, and the lower end portion of the guide bar 13 is connected to the upper holder 11.

Above the front end of the upper frame 7U, a pressurizing cylinder 15 for moving the upper holder 11 in the vertical direction is provided downward, and a piston rod capable of protruding downward from the pressurizing cylinder 15 is provided. The lower end of 17 is connected to the upper holder 11.

With the above structure, when the piston rod 17 is moved up and down by injecting pressure oil into a cylinder chamber (not shown) of the pressurizing cylinder 15, the upper holder 11 moves up and down along a guide member (not shown) and the guide bar 13. It is supposed to do.

An upper collet chuck 19 is provided on the front surface of the upper holder 11, and the upper collet chuck 1 is provided.
The upper electrode 21 is gripped by 9 so that the vertical position can be adjusted.

Further, on the upper side of the front end of the lower frame 7D,
A lower holder 23 is provided, and a lower collet chuck 25 is provided on the front surface of the lower holder 23. The lower electrode 27 is held by the lower collet chuck 25 so as to be vertically adjustable at a position facing the upper electrode 21.

Therefore, when performing spot welding, for example, the welding position of a work in which plate materials are overlapped is positioned between the upper electrode 21 and the lower electrode 27, and the upper electrode 21 is lowered by the pressurizing cylinder 15 to make this work. The work is sandwiched between the upper electrode 21 and the lower electrode 27 to perform welding.

On the other hand, in front of the frame 9, a work table 29, which is separate from the spot welding machine 1, is provided. The work table 29 is left and right centered on the upper electrode 21 and the lower electrode 27 (left and right in FIGS. 2 and 3).
Separate left table plates 3 arranged near both sides
1L and right table plate 31R, a pair of legs 33 that rotatably support the left table plate 31L and right table plate 31R, respectively, and a base 35 that vertically supports the pair of legs 33. .

The leg 33 is composed of a lower leg 37D which is erected vertically on the upper surface of the base 35, and an upper leg 37U which is provided inside the lower leg 37D so as to be vertically slidable. The left and right lower legs 37D are connected to each other by a horizontal member 39, and jacks 41 as vertical moving devices for vertically moving the upper legs 37U are provided at intersections of the horizontal members 39 and the lower legs 37D.

The jack 41 is interlocked with a rotary shaft 43 provided along the inside of the cross member 39. For example, the worm gear 45 attached to the rotary shaft 43.
And a worm wheel (not shown) attached to a screw shaft 47 provided downward on the lower side of the upper leg 37U. The handle 4 is attached to the right end of the rotary shaft 43.
9 is attached.

Therefore, when the handle 49 is rotated, the rotary shaft 43 is rotated to rotate the worm gear 45, and the worm wheel meshing with the worm gear 45 is rotated to rotate the screw shaft 47.
The left and right upper legs 37U can be vertically moved in synchronization along the inside of the lower legs 37D.

A pair of hinges 51, 51 are provided on the lower surfaces of the rear ends of the left table plate 31L and the right table plate 31R, respectively.
51 is attached, and is rotatably attached to the top plate 53 horizontally provided on the upper end of the upper leg 37U via the hinge 51. That is, the left table plate 31
The L and the right side table plate 31R have the hinge 51 as a fulcrum, and are in a vertical state when they are dropped from a horizontal state when they are used (see FIG.
It is rotatable up to the state shown by the chain double-dashed line).

Further, hinges 5 are provided near the central portions of the left table plate 31L and the right table plate 31R in the front-rear direction.
One end of a folding mechanism 57 that is foldable via 5 is rotatably attached.

The splashing mechanism 57 is composed of two upper and lower support members 59U and 59D which are rotatable around a center as a fulcrum, and ends of the upper support member 59U are hinges on the lower surface of the left side table plate 31L and the right side table plate 31R. 55 is attached to the upper leg 3 via the hinge 61.
It is rotatably attached to the side surface of 7U. The lowering mechanism 57 horizontally supports the left table plate 31L and the right table plate 31R in a state where the upper and lower support members 59U and 59D are extended (state shown by solid lines in FIGS. 1 and 2). The upper and lower support members 59 that sufficiently resist the load
In the state where U and 59D are folded (indicated by the chain double-dashed line in FIG. 1), the left table plate 31L and the right table plate 31R can be vertically oriented downward.

With the above construction, when the work table 29 is used during welding, the splashing mechanism 5 is used.
7, the upper and lower support members 59U and 59D are extended to hold the left side table plate 31L and the right side table plate 31R in a horizontal state, and the handle 49 is rotated to move the left side table plate 31L and the right side table plate 31R up and down to work. The height positions of the upper and lower electrodes 21 and 27 are adjusted.

When the work table 29 is not used, the upper and lower support members 59U and 59D of the splashing mechanism 57 are used.
Is folded and the left side table plate 31L and the right side table plate 31R are put away so as not to get in the way.

In this way, the legs 33 of the work table 29 are
Because the jack 41 can be expanded and contracted, the jack 4
By rotating the handle 49 of No. 1, the height of the left table plate 31L and the right table plate 31R can be finely adjusted. Further, the left side table plate 31L and the right side table plate 31R are separate bodies, and can be arbitrarily lowered by the splashing mechanism 57. Therefore, the left table plate 31L or the right table plate 31R can be selectively removed so as not to interfere with the welding work, and a working space can be secured.

[0024]

As will be understood from the above description of the embodiments, the present invention is, in the work table for supporting the work to be welded by the upper and lower electrodes in the spot welding machine, the left and right sides of the electrodes. The left and right legs (33) arranged in one direction are provided so as to be vertically expandable and contractible in synchronization with each other, and the left and right table plates (31L, 31R) supported above the left and right legs (33) are provided separately from each other. The left and right table plates (31L, 31R) are individually rotatably provided to a horizontal state position for supporting a work and a substantially vertical state position retracted from the side position of the electrode when not in use. is there.

As is apparent from the above structure, in the present invention, the left and right legs 33 supporting the left and right table plates 31L and 31R provided separately on the left and right sides of the electrodes in the spot welding machine are synchronously moved up and down. When the work supported on the left and right table plates 31L and 31R is moved in the left and right direction and spot welding is repeated, the left and right table plates 31L and 3R are repeatedly installed.
It is possible to move the 1R up and down in synchronization with each other, and it is possible to easily move and weld the work without rubbing the electrodes.

Further, for example, even in the case of spot welding the ceiling portion of a work having a top hat cross section,
This can be easily dealt with by moving the table plates 31L and 31R up and down.

Further, according to the present invention, the left and right table plates 31L and 31R are individually rotatably provided to the horizontal state position for supporting the work and the substantially vertical state position retracted from the side position of the electrode. Thus, for example, one table plate can support a work and the other table plate can be in a substantially vertical state, and spot welding can be performed corresponding to works of various shapes.

[Brief description of drawings]

FIG. 1 is a side view showing an entire work table for a spot welding machine according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG.

[Explanation of symbols]

 29 Work table 31L Left side table plate 31R Right side table plate 33 Legs 41 Jack (up and down moving device) 57 Splashing mechanism

Claims (1)

(57) [Claims] 1. In a work table for supporting a work to be welded by upper and lower electrodes in a spot welding machine, left and right legs (33) arranged on both left and right sides of the electrode can be vertically expanded and contracted synchronously. The left and right table plates (31) are provided and supported on the upper portions of the left and right legs (33).
L, 31R) are provided separately from each other, and the left and right table plates (31L, 31R) are moved to a horizontal state position for supporting a work and a substantially vertical state position retracted from the side position of the electrode when not in use. A work table for a spot welding machine, which is rotatably provided individually.