JPH0747478A - Chip changer - Google Patents

Abstract

PURPOSE:To provide a chip changer by which a chip attached newly is attached exactly to a shank by getting rid of a movement of the chip in a chip supply device, and moving a chip magazine being the chip supply device itself. CONSTITUTION:In the chip changer by which a chip 12 of a robot welding gun device is attached to a shank, fitting plates 4, 5 are fixed by providing vertically a step difference on two side faces 2, 3 of a support 1, and to both the fitting plates, holders 8, 9 by which chip magazines 6, 7 can slide are attached, respectively. Also, in one fitting plate, a guide plate 10 and a kick plate 11 are arranged in parallel to the upper face of the holder, and in the other fitting plate, a guide plate and a kick plate 16 are arranged in parallel to the lower face of the holder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip changer for attaching a tip of a welding gun device for a robot to a shank of the welding gun.

[0002]

2. Description of the Related Art When a tip of a welding gun device for a robot is consumed or damaged, it is necessary to replace the tip. Therefore, the tip newly attached to the welding gun is arranged in the tip supply gutter, and the shank of the welding gun is made vertical by the robot toward the vertical shank insertion hole of the tip in the gutter. Complete the installation of a new tip by lowering or raising it, inserting the shank into the shank insertion hole of the tip and mounting the tip on the shank, and then returning the shank of the welding gun vertically up or down by the robot. Was. Then, when the chips in the chip supply gutter are taken out by mounting the chips, the chips in the gutter are sequentially moved toward the tip of the gutter.

[0003]

By the way, in the above-mentioned conventional technique, since the chip moves in the chip supply trough, there is no particular problem with the concentric chip. In the case of an eccentric tip, since the insertion direction to the shank is decided, if the tip moves in the tip supply trough, the insertion direction to the shank will not be constant, so it will not be possible to accurately attach to the shank. There's a problem.

The present invention has been made in view of the above problems of the prior art, and an object thereof is a chip supply device which eliminates the movement of chips in the chip supply device. It is an object of the present invention to provide a tip changer in which a newly attached tip can be accurately attached to a shank by moving the tip magazine itself.

[0005]

In order to achieve the above object, a chip changer according to the present invention has a mounting plate having stepped upper and lower portions fixed to two side surfaces of a column, and the chip magazines are mounted on the mounting plates respectively. Attach a slidable holder, place a guide plate and a kick plate side by side on one mounting plate in parallel with the upper surface of the holder, and on the other mounting plate,
It is characterized in that a guide plate and a kick plate are arranged in parallel with the lower surface of the holder.

According to a second aspect of the present invention, the mounting plate is fixed to the two perpendicular side surfaces of the support column by providing vertical steps.

According to a third aspect of the present invention, the mounting plate is fixed to the two parallel side surfaces of the support column by providing vertical steps.

[0008]

The newly mounted tips are respectively held in the tip magazines, the tip magazines are moved, and the first tip is sequentially attached to the shank of the welding gun.
A large number of eccentric chips are held in the chip magazine slidably held by the holder attached to one of the mounting plates with the shank insertion hole opened downward. The tip of the tip is guided by a guide plate near the tip of the tip of the holder, and the tip of the tip of the tip is pressed by a kick plate. The tip magazine moves each time the earliest tip is taken out, and the head of the next tip is pressed by the kick plate. Further, in the chip magazine slidably held by the holder mounted on the other mounting plate, a large number of eccentric chips are held with the shank insertion holes open upwards. The tip of the tip is guided by the guide plate near the tip of the tip of the holder, and the tip of the tip of the tip is supported by the kick plate. Then, the tip magazine moves each time the earliest tip is taken out, and the head of the next tip moves to the kick play position.
Will be supported by.

The chip magazine has two columns.
Since it is slidably mounted on a holder mounted on a mounting plate that is fixed with two upper and lower steps on each side, there is a gap between the tip of each tip in the vertical and horizontal directions. It does not hinder vertical movement.

[0010]

Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a support pillar for supporting a chip changer, and mounting plates 4 and 5 are fixed to two side surfaces 2 and 3 of the support pillar 1, respectively, with stepped portions provided vertically. Then, holders 8 and 9 on which the chip magazines 6 and 7 can slide are attached, respectively.

On one of the mounting plates 4, a guide plate 10 and a kick plate are arranged in parallel with the upper surface of the holder 8.
Toe 11 is juxtaposed and attached. A large number of eccentric chips 12 are held in the chip magazine 6 slidably arranged in the holder 8 with the shank insertion hole 13 being opened downward. The tip of the tip is guided by the guide plate 10 in the vicinity of the tip of the tip, and the tip of the tip 12 ′ of the tip is pressed by the kick plate 11. Further, the body portion of the tip 12 ′ at the front end is stopped by the stopper 14 arranged at the tip portion of the holder 8.

Further, on the other mounting plate 5, a guide plate 15 and a kick plate are arranged in parallel with the lower surface of the holder 9.
The boots 16 are mounted side by side. A large number of eccentric chips 17 are held in the chip magazine 7 slidably arranged in the holder 9 with the shank insertion hole 18 opened upward. The tip of the tip is guided by the guide plate 15 near the tip of the tip, and the head of the tip 17 'of the tip is supported by the kick plate 16. Further, the body of the tip 17 ′ at the front end is stopped by a stopper 19 arranged at the tip of the holder 9.

A handle 20 is attached to the rear end of the chip magazine 6, and a string 21 whose one end is connected to the lower end of the handle 20 has a pulley 22 and a bar 23 attached to the attachment plate 4. Has a weight 25 at the other end through a pulley 24 attached to the tip of the. A handle 26 is also attached to the rear end of the chip magazine 7, and a string 27 having one end coupled to the lower end of the handle 26 is attached to the attachment plate 5.
It has a weight 31 at the other end through a pulley 28 attached to the end of the pulley 28 and a pulley 30 attached to the tip of the bar 29.

In the chip changer having the above structure, the chip 12 to be newly attached is held in the chip magazine 6 and the tip 12 'of the earliest one is held.
The tip of one shank (not shown) of the welding gun is raised toward the insertion hole 13 of the tip 12 'while the tip 12' is attached to the shank while the tip 12 'is stopped by the stopper 14. Since the head of the is pressed by the kick plate 11, its attachment is surely performed. Then, when the attachment of the chip 12 'to the shank is completed, the shank is lowered and the chip 12' is taken out from the chip magazine 6. By taking out the chip 12 ', the function of the stopper 14 is temporarily stopped, the chip magazine 6 is moved until the head of the next chip is pressed by the kick plate 11, and the body of the chip is stopped by the stopper 14'.
When stopped by, the movement of the chip magazine 6 stops. The movement of the chip magazine 6 is performed by the urging force of the weight 25.

Further, the tip 17 to be newly attached is held in the tip magazine 7, and the tip 17 ′ of the tip thereof is stopped by the stopper 19, and the other shank (not shown) of the welding gun. Tip is tip 1
While the tip 17 'is lowered toward the insertion hole 18 of the 7'and attached to the shank, the head of the tip 17' is supported by the kick plate 16 so that the attachment is surely performed. Then, when the attachment of the chip 17 'to the shank is completed, the shank is pulled out in the horizontal direction, and the chip 17' is taken out from the chip magazine 7. By removing the tip 17 ', the function of the stopper 19 is temporarily stopped, the tip magazine 7 moves until the head of the next tip is supported by the kick plate 16, and the body of the tip is stopped by the stopper 19. The movement of the chip magazine 7 is stopped. The chip magazine 7 is moved by the urging force of the weight 31.

The chip magazines 6 and 7 are slidable on holders 8 and 9 mounted on mounting plates 4 and 5, which are fixed to the two side surfaces 2 and 3 of the support column with vertical steps. Since they are arranged, a sufficient space is maintained in the vertical and horizontal directions between the tip 12 'and 17' of the respective tips so that the vertical movement of the welding gun is not hindered. In addition,
Steps are vertically provided on the two side surfaces 2 and 32 of the column to fix the mounting plates 4 and 5, and the chip magazines 6 and 7 are installed in parallel to the mounting plates 4 and 5 via the holders 8 and 9. Can also perform a similar function.

[0017]

According to the present invention, the chip in the chip magazine to be newly attached does not move in the chip magazine, but the chip magazine itself moves, so that the chip in the chip magazine has its directionality. Supplied while maintained, provides a tip changer that can be securely attached to the shunt in the correct orientation.

Since the chips to be taken out are sufficiently spaced from each other, the chip changer does not hinder the movement of the welding gun when the chips are taken out.

[Brief description of drawings]

FIG. 1 is a plan view of a tip changer according to the present invention.

FIG. 2 is a view taken along the line EE in FIG.

FIG. 3 is a view on arrow of FIG.

[Explanation of symbols]

 1 Support 2,3 Sides 4,5 Mounting plate 6,7 Chip magazine 8,9 Holder 10,15 Guide plate 11,16 Kick plate 12,17 Chip

Claims (3)

[Claims] 1. A tip changer for attaching a tip of a robot welding gun device to a shank, wherein a mounting plate having stepped portions is fixed on two side surfaces of a column, and a chip magazine slides on each mounting plate. Attach a possible holder, and place a guide plate and a kick plate on one mounting plate in parallel with the upper surface of the holder, and on the other mounting plate, in parallel with the lower surface of the holder, a guide plate and a kick plate. A tip changer characterized by the juxtaposition of the toes. 2. The tip changer according to claim 1, wherein the mounting plate is fixed to the two perpendicular side surfaces of the support column by providing a vertical step. 3. The chip changer according to claim 1, wherein the mounting plate is fixed to the two parallel side surfaces of the support column by providing a vertical step.