JP3494190B2 - Welding positioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a welding positioner for performing welding on a work having a considerably large weight and shape.

[0002]

2. Description of the Related Art Although not shown, various welding positioners have been conventionally considered for welding a workpiece having a large weight and shape. This type of welding positioner has a gripping device for gripping a workpiece. Then, the workpiece is gripped by the gripping device, and the workpiece is inverted to set the position at which welding is easy.

[0003]

Although the prior art welding positioner has a gripping device for gripping a workpiece, the structure of the gripping device is complicated and the manufacturing cost thereof is high. In addition, the work held by the gripping device may be dropped, which is unsatisfactory. It is an object of the present invention to provide a welding positioner that can solve the above problems.

[0004]

In the welding positioner of the present invention, a pair of left and right frames are erected on the upper surface of the substrate.
The pair of left and right frames are formed by two standing plates having a predetermined interval, and a plurality of chain wheels are rotatably pivoted between the two standing plates on the upper front part and the rear part, and on the lower side. Support, slacken the endless chain over the chain wheels, and place the workpiece across both chains of the left and right frames at the position between the upper front and rear chain wheels. The workpiece is rotated in the opposite direction to the rotation direction of the chain at the mounting position by rotating the workpiece over the plurality of chain wheels. Then, a plurality of lower chain wheels between the two standing plates of each frame are arranged in the front and rear. Further, a drive shaft for driving the chain is provided over both chains arranged on the left and right frames, and chain wheels that engage with the both chains are fixedly attached to the drive shaft, and the drive shaft is rotationally driven by an electric motor. I did it. Further, instead of the electric motor, a hydraulic motor is arranged, or the drive shaft is manually rotated without attaching the electric motor. Alternatively, electric motors for rotatably driving the respective chains are arranged with respect to the chains arranged on the left and right frames, and both electric motors are energized / de-energized by a single switch. Further, instead of the both electric motors, hydraulic motors are respectively arranged, and both the hydraulic motors are rotated / stopped by a single operation means. In addition, the height of the workpiece can be adjusted without changing the length of the chain by symmetrically displacing the pivotal positions of the chain wheels arranged on the left and right frames.

[0005]

In the present invention, since the work piece is placed over both chains of the left and right frames which are erected on the upper surface of the substrate, the work piece can be set at a required low position where welding is easy. Further, it is possible to weld a work piece having a length longer than the distance between the chains. Further, since the work piece is not gripped by the gripping device, the work piece can be rotated in a desired direction by rotating the chain, and the necessary welded portion can be easily welded. Further, a drive shaft for driving the chain is provided across both chains arranged in the left and right frames, and a chain wheel that engages with the both chains is fixedly attached to the drive shaft, and the drive shaft is rotated by an electric motor or a hydraulic motor. Since it is driven, the workpiece can be rotated by power. If the drive shaft is rotated by manual operation without mounting the electric motor or the hydraulic motor, the manufacturing cost of the welding positioner can be reduced. Also, electric motors that rotate and drive the respective chains are respectively arranged for the chains arranged on the left and right frames, and energization / de-energization of both electric motors is controlled by a single switch, Alternatively, instead of the both electric motors, hydraulic motors are respectively arranged, and rotation and stop of both hydraulic motors are operated by a single switch or lever. Since both chains can be directly driven by the motor, a long drive shaft for power transmission can be eliminated. Also, without changing the length of the left and right chains, by symmetrically displacing one of the chain wheels arranged on the left and right frames, the workpiece can be set to the required mounting height on the chain. it can.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partially cutaway front view of a welding positioner 10 of the present invention. In the figure, 11 is a substrate at the bottom of the welding positioner 10, 12L and 12R are a pair of left and right frames standing on the upper surface of the substrate 11, 13 and 13 'are standing plates of the frame 12L, and 14 and 14' are frames 12R. Vertical plate, 15L and 15R are frame 12
L and 12R have chain wheels provided on the upper front side, 16L, 17L, 16R and 17R have chain wheels provided on the lower side, respectively, 18 is an electric motor, 19 is a speed reducer, 20 is a drive shaft, and 21L and 21R are Each chain,
22 (indicated by a virtual line) is a work piece. FIG. 2 is a side view seen from A in FIG. In the figure, 23L, 23R
Are the upper rear chain wheels (chain wheel 23L is on the side opposite 23R), 24R, (24
L), 25R, (25L), 26R, and (26L) are lower chain wheels, respectively. FIG. 3 is a plan view seen from B of FIG. FIG. 4 is a cutaway view of a main part viewed from CC of FIG. As shown in FIG. 4, the drive shaft 20 is divided into a plurality of shafts by couplings 27, 28 and 29 to form a single long shaft, and the long drive shaft 20 is formed into a plurality of bearings. The parts 30, 31, ..., 35 are rotatably supported.

Next, the structure of the welding positioner 10 of the present invention will be described with reference to FIGS. In the present invention, the substrate 11
A pair of left and right frames 12L and 12R are erected on the upper surface of the frame, and each of the frames 12L and 12R is provided with two standing plates 13-13 ′, 1 having a predetermined space S (shown in FIG. 4).
4-14 ', and between the two standing plates 13 and 13', and between the standing plates 14 and 14 ', chain wheels 15L and 15R are provided at the upper front part and a chain wheel is provided at the upper rear part. Wheels 23L and 23R, 16L-2 on the lower side again
4L-17L-25L-26L, 16R-24R-17
Each of R-25R-26R was rotatably supported. Then, the endless chains 21L and 21R are loosely hung around the plurality of left and right chain wheels, and are placed at a position between the upper front chain wheels 15L and 15R and the upper rear chain wheels 23L and 23R. , The workpiece 22 is placed on both chains 21L and 21R of the left and right frames 12L and 12R, and the chains 22L and 21R are rotationally driven over the plurality of chain wheels, so that the workpiece 22 is placed at the placement position. 21L, 2
It was made to rotate in the direction opposite to the rotation direction of 1R.
The drive shaft 2 for driving the chain extends across the chains 21L and 21R arranged on the left and right frames 12L and 12R.
0 is provided, and the drive shaft 20 has both chains 21L, 21
The chain wheels 17L and 17R that mesh with R are fixedly attached, and the drive shaft 20 is rotationally driven by an electric motor 18 with a reduction gear 19.

Although not shown as a welding positioner according to another embodiment of the present invention, a hydraulic motor may be arranged in place of the electric motor 18, or the drive shaft may be manually rotated without attaching the electric motor. I chose
Alternatively, although not shown as a positioner for welding in another embodiment, electric motors for rotationally driving the respective chains are respectively arranged with respect to the chains arranged on the left and right frames, and the electric powers of both electric motors are energized.・ Non-energization is operated by a single switch, or hydraulic motors are arranged instead of both electric motors, and both hydraulic motors are rotated and stopped by a single operation means. . Of the plurality of chain wheels arranged on the left and right frames 12L and 12R, for example, the pivot positions of the chain wheels 16L and 16R are symmetrically displaced, and the pivot positions of the chain wheels 26L and 26R are symmetrically displaced. (Although the displacement means is not shown, a hole through which the support shaft of the chain wheels 16L, 16R, 26L, 26R is inserted is formed in a vertically elongated hole, and the support shaft is hydraulically or pneumatically installed along the elongated hole. The height of the work piece 22 is adjusted without changing the lengths of the chains 21L and 21R.

Next, the operation of the welding positioner 10 of the present invention will be described. In the present invention, both chains 21L and 2L of the left and right frames 12L and 12R that are erected on the upper surface of the substrate 11
Since the workpiece 22 is placed over 1R,
The required low position for easy welding of the work piece 22 (see FIGS. 1 and 2).
It can be set to a lower position of the height h shown in FIG. Then, the workpiece 22 having a longer length can be welded from the distance L (shown in FIG. 1) between the chains 21L-21R. Further, since the work piece 22 is not gripped by the gripping device, the work piece 22 can be rotated in a desired direction by rotating the chains 21L and 21R, and a required welded portion can be easily welded. Further, a drive shaft 20 for driving the chain is provided across the chains 21L and 21R arranged on the left and right frames 12L and 12R, and the drive shaft 20 has both the chains 2 and 2R.
Chain wheels 17 that mesh with 1L and 21R respectively
Since L and 17R are fixedly mounted and the drive shaft 20 is rotationally driven by the electric motor 18 or the hydraulic motor (not shown), the workpiece 22 can be rotated by power. If the drive shaft is rotated by manual operation without mounting the electric motor or the hydraulic motor, the manufacturing cost of the welding positioner can be reduced. Further, electric motors (not shown) for rotationally driving the respective chains 21L, 21R are respectively arranged for the chains 21L, 21R arranged on the left and right frames 12L, 12R, and the electric currents for both electric motors are
Non-energized by operating a single switch (not shown), or instead of both electric motors, hydraulic motors (not shown) are arranged,
If the rotation and stop of both hydraulic motors are operated by a single switch or lever, a small 2
Since both chains can be directly driven by a single electric motor or hydraulic motor, a long drive shaft for power transmission can be eliminated. In addition, without changing the length (the total length of the endless shape) of the left and right chains 21L and 21R, for example, the chain wheels 16L and 16R among the chain wheels arranged on the left and right frames 12L and 12R are symmetrical,
Further, the workpiece 22 can be set to a required mounting height on the chains 21L and 21R by displacing the chain wheels 26L and 26R symmetrically in the vertical direction.

[0010]

In the welding positioner of the present invention, the work piece is placed over both chains of the left and right frames which are erected on the upper surface of the substrate, so that the work piece is set at a required low position for easy welding. can do. That is, since it is only necessary to place the work piece on both the chains, there is no need to perform an operation of gripping the work piece by the welding positioner,
The work piece can be attached to the welding positioner in a very short time. Further, since the workpiece is placed on both chains, the shape and size of the welding positioner can be set to the minimum, and the space in the factory can be effectively used. Further, since the workpiece is not gripped by the gripping device, there is no portion where the workpiece is gripped and cannot be welded. Therefore, by rotating the chain, the workpiece can be rotated in the required direction and the required welded portion can be easily welded, so that the welding workability can be improved. Further, in the welding positioner of the present invention, one of the chain wheels arranged on the left and right frames is symmetrically displaced without changing the lengths of the left and right chains, so that the workpiece is mounted on the chain as required. Since the table height can be set, welding can be performed easily and reliably according to the shape and size of the workpiece. Further, since the welding positioner of the present invention does not require a gripping device for gripping a workpiece, it has a simple structure and can be manufactured at low cost, which is advantageous in terms of maintainability and economy.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a welding positioner of the present invention.

FIG. 2 is a side view seen from A in FIG.

FIG. 3 is a plan view seen from B of FIG.

FIG. 4 is a cutaway view of an essential part seen from CC in FIG.

[Explanation of symbols]

10 Weld Positioner 11 Substrate 12L, 12R Frame 13, 13 ', 14, 14' Stands 15L, 15R, 16L, 16R, 17L, 17R, 2
3L, 23R, 24L, 24R, 25L, 25R Chain wheel 18 Electric motor 19 Reduction gear 20 Drive shaft 21L, 21R Chain 22 Work piece 30, 31, ~, 35 Bearing part

Claims (8)

(57) [Claims] 1. A pair of left and right frames are erected on an upper surface of a substrate, and the pair of left and right frames are formed by two standing plates having a predetermined interval, and an upper side between the two standing plates is provided. A plurality of chain wheels are rotatably supported over the front part, the rear part, and the lower side, and an endless chain is loosened and hung around the plurality of chain wheels.
The workpiece is placed over both chains of the left and right frames at a position between the front and rear chain wheels on the upper side, and the chain is rotationally driven over the plurality of chain wheels so that the workpiece is placed at the placement position. Positioner for welding, characterized in that it can be rotated in the opposite direction to the rotation direction of the chain. 2. A welding positioner according to claim 1, characterized in that a plurality disposed over the front and rear of the lower chain wheel between two of the upright plate of each frame. Wherein characterized in that to adjust the height of the workpiece without changing the length of the chain by displacing the pivot position of the chain wheel are arranged in the left and right frames symmetrically The positioner for welding according to claim 1 or 2 . 4. The two chis arranged on the left and right frames.
A drive shaft for driving the chain is installed over the
Chain wheels that mesh with the above chains on the shaft
Mounted fixedly, the drive shaft is rotated by an electric motor
4. The method according to any one of claims 1 to 3, characterized in that
The welding positioner according to any one of the above . 5. A hydraulic motor is provided in place of the electric motor.
The welding positioner according to claim 4 , wherein the positioner for welding is arranged . 6. A drive shaft without mounting said electric motor
Claimed to be able to rotate by manual operation
Item 4. A welding positioner characterized by the item 4 . 7. A checker arranged on the left and right frames.
The electric motor that drives each chain
Place each of them and turn on / off both the electric motors.
Characterized by being operated with several switches
The welding positioner according to any one of claims 1 to 3 . 8. A checker arranged on the left and right frames.
The hydraulic motor that rotationally drives each chain.
Place each and rotate and stop both hydraulic motors
The operation is performed by individual operation means.
The welding positioner according to any one of 1 to 3 .