JP2002137065A - Gun unit movable on floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency by shortening transport time of welding jigs in accordance with transfer of welding process. SOLUTION: The gun unit movable on the floor includes a movable cart 1, a transformer 2 carried by the cart 1, a breaker 20, a column 3 mounted on the cart 1, an height adjusting arm 4 that is held by the column 3 adjustably in its vertical height, a length adjusting arm 5 that is held by the height adjusting arm 4 adjustably in its horizontal length, a hanger arm 6 that horizontally extends from the length adjusting arm 5, a spot-welding gun 7 that is hung from the hanger arm 6 and a cable 8 that has a connector 80 on its one end and supplies electric power, air and water to the spot-welding gun 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile gun unit used for manufacturing automobiles and the like, and more particularly to a spot welding gun unit capable of moving on a floor.

[0002]

2. Description of the Related Art A spot welding gun device used in the production of automobiles and the like is constructed by suspending a transformer 101 on a large number of I-beams 100 conventionally provided on the ceiling of a factory.
Further, a spot welding gun 102 is suspended from the transformer 101, and a power supply (400 V
103), a water source 104 for supplying cooling water, an air source 105 for operating the cylinder of the spot welding gun,
A breaker for preventing electric leakage, a timer contactor 106 for setting an operation time, and the like were fixed to a ceiling or the like (see FIG. 3). The plane trolley 107 and the gun rail 10 are attached to the plurality of I-beams 100 provided in parallel.
8, the spot welding gun 102 and the transformer 10
1 is suspended, removed, attached, and moved according to the movement of the work process.

A power supply (400 V distribution board) 103 fixed to a ceiling or the like supplies electricity to a transformer 101 by an electric cord 109, and changes the current and voltage by the transformer 101 and supplies the same to a spot welding gun 102. Was.

The cooling water is water for cooling the transformer 101, the timer contactor 106, and the cylinder and arm of the spot welding gun 102. The cooling water hose 110 requires two pipes, a supply pipe and a discharge pipe. It is. The supply pipe for the cooling water hose 110 is 6 in the conventional example.
The minute pipe was used as a base pipe, branched into four members, cooled, and circulated.

[0005] Air is also used for cylinder operation of the spot welding gun. These electric cords 10
9. The cooling water hose 110 and the air hose 111 are respectively provided with a power source 103, a water source 104,
5 was fixedly connected to the base end.

[0006]

According to the conventional spot welding gun device, the spot welding gun 102 and the transformer 101 are separately suspended from a large number of I-beams 100 provided on the ceiling. When the jigs such as the spot welding gun 102 and the transformer 101 are to be moved with the movement of the I-beam 100, it is necessary to remove these jigs from the I-beam 100 and move them to the I-beam 100 in another process.

However, the jigs such as the spot welding gun 102 and the welding transformer 101 are heavy in weight, and the power supply cord 109, the cooling water hose 110, and the terminal are fixed to a fixed place in the work place. Since the air hoses 111 are connected, the operation of moving them is a difficult operation that requires power for the operator,
There was a problem that an excessive load was applied to the worker's body.

Further, there is a problem that the work of moving the jig accompanying the movement of the welding process takes a long time and the working efficiency is poor.
Also, in a workplace where there is no I-beam facility on the ceiling, a new I-beam has to be installed, and there has been a problem that the construction period is lengthened and capital investment is increased.

[0009]

[Means for solving the problem] In order to solve this problem,
A mobile trolley, a transformer mounted on the mobile trolley, a breaker, a column standing upright on the mobile trolley, a height adjustment arm attached to the column and adjustable in length in a height direction, and a height. A length adjustment arm attached to the adjustment arm and adjustable in length in the horizontal direction, a suspension arm provided in the horizontal direction of the length adjustment arm, a spot welding gun suspended from the arm, and a connector at the base end of the cable A floor-movable gun unit having a structure and a cable capable of supplying electricity, air, and water to a spot welding gun is proposed.

[0010] Also, a movable trolley, a transformer with a control device mounted on the movable trolley, a breaker, a timer contactor, a column portion erected on the movable trolley, and attached to the column portion in a height direction. A height-adjustable arm with adjustable length,
Two length adjustment arms attached to the height adjustment arm and capable of adjusting the length in the horizontal direction and changing the distance between each other; a hanging arm provided in the horizontal direction of the length adjustment arm; and a balancer mounted on the arm The floor can be moved, characterized by having a spot welding gun suspended by a cable and a connector that can be connected and disconnected at the base end of the cable to the power supply air source supply device, and has an electric cord, a cooling water hose, and a cable with a built-in air hose. A new gun unit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. 1 which is a perspective view of a floor movable gun unit and FIG. 2 which is also a front view.

A floor movable gun unit according to one embodiment of the present invention includes a movable trolley 1 having casters 10, a welding transformer 2 with a control device mounted on the movable trolley 1, and a breaker 20. , A timer contactor (controller device) 21, a column 3 erected on the movable trolley 1, and two height adjustments which are attached to the column 3 via a pillow block 30 and whose length can be freely adjusted in the height direction. An arm 4, two length adjusting arms 5 attached to the respective height adjusting arms 4, the length of which can be adjusted in the horizontal direction; a hanging arm 6 provided at a tip of each of the length adjusting arms 5; A spot welding gun 7 suspended from the lowering arm 6 by a balancer 60, two cooling water hoses of an electric cord, a supply pipe and a drain pipe,
A cable 8 having a built-in air hose is provided.

The cable 8 is provided with a connector (cassette type) 80 which can be connected to and disconnected from a power water source / air source supply device 9 fixedly provided at one or a plurality of work sites on the base terminal side. The connector portion (cassette type) 80 of the cable 8
Three types of terminals, an electric cord, a cooling water hose, and an air hose, are provided in the coupler. , A moving unit 1 of a gun unit that can move the air on the floor using an air hose
Supplied to the side.

The electric cord in the cable 8 is connected to the transformer 2 once, and the voltage 400 V is reduced to about 20 V, and the high current 10
The electric power for generating 000 A is supplied to the spot welding gun 7. The breaker 20 functions as a safety device for preventing electric leakage.

The cooling water is supplied to the transformer 2 by a supply pipe.
The timer contactor 21 and the cylinder and arm of the spot welding gun 7 are cooled. The cooling water hose has two pipes, a supply pipe and a discharge pipe. Each branch is branched into four members, and the downstream side is connected to the discharge pipe and drained.

The distal end of the cable 8 is connected to the spot welding gun 7, and the intermediate portion on the distal end is suspended by the suspension arm 6 by an elastic body 61 such as a spring.
The intermediate portion on the base side is supported by the U-shaped body of the auxiliary cable support 32.

Each power source water source air source supply device 9 includes:
It is installed at an appropriate place in the work place, and has a structure corresponding to the connector section 80 of the cable 8 respectively. The electric connection of each power supply water source air source supply device 9 is connected to a 400 V distribution board 93 which is a power supply by an electric cord 90, and the cooling water connection is two cooling water hoses of a supply pipe and a discharge pipe. The cooling water is circulated by connecting to a circulating cooling device (not shown) by 91, and an air connection portion is connected to an air source such as an air compressor (not shown) by an air hose 92.
Connected to each other.

On the movable trolley 1, a transformer holder 22 for mounting the welding transformer 2 with a control device is provided at a rear portion of the column portion 3, and provided at a rear portion of the transformer holder 22 and fixed to a breaker box mounting portion. A breaker 20 provided in a breaker box 23 and a timer contactor 2 provided in a rear part of the breaker box 23 and attached to a timer contactor protection guard 24.
1 is placed.

The pillow block mounting base 3 is provided on the upper part of the pillar 3.
1, a pillow block 30 that can be opened and closed in a hinge shape is attached, and one height adjustment arm 4 is attached to each pillow block 30 that opens and closes up to a 180-degree angle. An auxiliary cable support 32 composed of two U-shaped members is attached to the upper end of the column 3, and supports an intermediate portion of the cable 8.

Each of the height adjusting arms 4 has two hollow cylinders provided with a plurality of bolt holes 40 in the height direction.
The bolt 41 is inserted into the bolt hole 40 according to the height of the work area.
And fix the height. In this embodiment, 10c
It is possible to expand and contract up to 40cm in 4 steps of m, 3m
The work can be fixed at any height up to the height range.

Each of the length adjusting arms 5 includes two hollow cylinders provided with a plurality of bolt holes 50 in the horizontal direction.
Adjust the length according to the work and insert the bolt 5 into the bolt hole 50.
Insert 1 and fix the length. In this embodiment, 15
It is possible to expand and contract up to 45 cm in 3 steps by 3 cm.

The spot welding gun 7 is suspended by a balancer 60 detachably provided on each suspension arm 6, and assists a worker in pulling down and maintaining a fixed position.

Next, the operation of the first embodiment of the present invention will be described. The floor-movable gun unit can be moved to a position where the spot welding gun 7 is operated, and the mobile trolley 1 having the casters 10 is moved by the pushing operation of the operator.

As the process moves, the floor-movable gun unit moves, and by connecting the base end of the cable 8 to the outlet of the process, the spot welding gun 7 and the welding transformer 2 with the control device operate. Work becomes possible.

Each of the height adjusting arms 4 fixes the height in accordance with the work area. Each length adjustment arm 5 adjusts the length according to the work area and fixes the length in the horizontal direction. Since the height adjusting arm 4 is attached to the pillow block 30 that can be opened and closed to a 180-degree angle, the working range of the spot welding gun 7 can be set in a wide range. Different types of spot welding guns 7, for example, an X gun and a C gun, are attached to the two height adjusting arms 4, respectively, and can be selected and used depending on the work object.

[0026]

According to the present invention, the spot welding gun and the welding transformer can be easily and quickly moved in accordance with the work process and the movement of the jig. The work efficiency was greatly improved in comparison.

The process can be easily moved simultaneously with the movement of the jig.

In the operation of moving the spot welding gun, the jigs such as the transformer and the breaker are set on the movable carriage, so that the jig can be easily moved, and the force of the operator required for the moving operation is reduced. Was able to reduce the exhaustion of physical strength.

Since it is not necessary to newly install an I-beam which needs to be extended a number of times in parallel with the ceiling serving as a work place for the spot welding gun, the equipment is simplified, the construction period is shortened, and the capital investment is reduced. Was done.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view of a floor movable gun unit showing one embodiment of the present invention;

FIG. 2 is an explanatory front view of the floor movable gun unit of the floor movable gun unit showing one embodiment of the present invention;

FIG. 3 is an explanatory front view of a conventional gun unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Moving trolley 10 Caster 2 Welding transformer with control device 20 Breaker 21 Timer contactor 22 Trans holder 23 Breaker box 24 Protective guard for timer 3 Column part 3 30 Pillow block 31 Pillow block mounting base 32 U-shaped auxiliary cable support part 4 Height Length adjustment arm 40 Bolt hole 41 Bolt 5 Length adjustment arm 50 Bolt hole 51 Bolt 6 Hanging arm 60 Balancer 61 Elastic body (spring etc.) 7 Spot welding gun 8 Cable 80 Cable connector 9 Power supply water source air source supply device 90 Power cord 91 Cooling water hose (supply pipe, discharge pipe) 92 Air hose 93 Power supply (400 V distribution board) 100 I-beam (conventional example) 101 Transformer (conventional example) 102 Spot welding gun (conventional example) 103 Power source (conventional example) 104 Water source (conventional example) 105 Air source (conventional example) 106 Timer contactor (conventional example) 107 Plain trolley (conventional example) 108 Gun rail (conventional example) 109 Power cord (conventional example) 110 Cooling water hose (Supply piping, discharge piping) (Conventional example) 111 Air hose (Conventional example)

Claims (2)

[Claims] 1. A mobile trolley, a transformer mounted on the mobile trolley, a breaker, and a column standing upright on the mobile trolley,
A height adjustment arm attached to the pillar and adjustable in length in the height direction, a length adjustment arm attached to the height adjustment arm and adjustable in length in the horizontal direction, and provided horizontally in the length adjustment arm Floor movable, characterized by having a hanging arm to be suspended, a spot welding gun suspended from the arm, and a cable capable of supplying electricity, air and water to the spot welding gun with a connector structure at the base end of the cable. Gun unit. 2. A movable trolley, a transformer with a control device mounted on the movable trolley, a breaker, a timer contactor, a pillar portion erected on the movable trolley, and mounted on the pillar portion in a height direction. A height-adjustable arm with adjustable length, two length-adjustable arms attached to the height-adjustable arm and adjustable in length in the horizontal direction, and the distance between each other can be changed. A hanging arm to be provided, a spot welding gun to be hung by a balancer on the arm, and a cable with a built-in electrical cord, cooling water hose, and air hose that can be connected and disconnected from the power supply air source supply device at the base end of the cable And a floor-movable gun unit.