JPH05200588A - Device for positioning work to be welded - Google Patents

Abstract

PURPOSE:To suitably position the work to be welded with the simple structure by providing the slide driving means to carry the holding member from the waiting position to the welding position on the carrying path. CONSTITUTION:At the time point that the work body W mounted on a pallet truck 1 is carried to the welding station with the carrying means, a slide tower 5 and a holding frame 6 are slid and displaced to the direction approaching to the carrying path of the pallet truck 1 with the carrying means composed of the 2nd slide driving means 18. And the end surface of inner side of the work Y to be welded is abutted to the end surface of outer side of the work body W, and set at the welding position. Next, the work Y to be welded is attached to the work body W by spot-welding the welding place preliminarily decided with the welding robot, etc., arranged on the welding station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding work positioning device for welding a work body which is placed on a pallet truck and conveyed.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 62-179873.
As disclosed in the publication, in a welding device for a work made of a panel material or the like that constitutes a vehicle body, the work is placed on a pallet trolley and conveyed to an installation part (welding station) of the welding device for welding. Is being done.

As shown in FIG. 7, the pallet truck has the following structure.
A pallet base 42 having traveling wheels 41, a support member 43 for a work body (floor panel) W standing on the upper surface of the pallet base 42, and the pallet base 42.
And a holding member 44 for the welding work (side sill inner panel) Y provided on the side edge of the holding member 44. By swinging and displacing the holding member 44 with a support shaft 45 provided at the base end thereof as a fulcrum. , From the mounting position of the welding work retracted outward as shown by the phantom line to the welding position where the welding work Y is brought into contact with the side portion of the work body W as shown by the solid line, A welding device (not shown) is configured to weld the welding work Y to the side portion of the work body W.

[0004]

In the conventional apparatus having the above structure, since the holding member for positioning the welding work is provided on each pallet truck, the weight of the pallet truck becomes heavy and the manufacturing cost becomes high. This is unavoidable, and there is a problem that the holding member becomes an obstacle when performing work other than the welding process. Also,
Since it is difficult to adjust the holding position of the welding work by the holding member according to the change in the size of the work body placed on the pallet trolley, it is necessary to prepare various pallet trolleys corresponding to the type of work. There was a problem that there is.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to properly position a welding work with a simple structure and easily adapt to changes in the size of the work body and the like. It is an object of the present invention to provide a welding work positioning device that can perform welding.

[0006]

SUMMARY OF THE INVENTION The present invention is a positioning device for setting a welding work to be welded to a work main body, which is placed on a pallet carriage and conveyed, in a state of being positioned. A holding member for detachably holding the welding work and a holding position of the welding work by the holding member at a welding station arranged along the conveyance path of the pallet carriage, corresponding to the type of the work. The adjusting means and the moving means for moving the holding member from the standby position separated from the transport path to the welding position on the transport path are provided.

[0007]

According to the present invention having the above-mentioned structure, the welding work is held on the pallet carriage by moving the holding member from the standby position to the welding position by the moving means while holding the welding work. It can be set while positioned on the work body. Further, when the type of the work changes and it is necessary to move the welding work setting position, the welding work is set on the work body by adjusting the holding position of the welding work by the holding member by the adjusting means. The position can be changed easily and properly.

[0008]

1 and 2 show an embodiment of a welding work positioning apparatus according to the present invention. This welding work positioning device includes a frame base 3 arranged at welding stations located on both sides of the traveling rail 2 of the pallet carriage 1, and a conveying direction of the pallet carriage 1 on the frame base 3. Along with the slide base 4 slidably supported, and on the slide base 4 slidably supported in the direction shown by the arrow B, that is, in the direction orthogonal to the transport direction of the pallet carriage 1. Along the slide tower 5 and the guide member provided on the slide tower 5, in the direction of arrow C,
It has a holding frame 6 supported so as to be able to move up and down.

The pallet trolley 1 supports a pallet base 8 having traveling wheels 7 rolling on a traveling rail 2 and a work body W which is erected on the pallet base 8 and includes a floor panel of an automobile. The member 10 and the positioning pins 11 and 12 which are fitted into the positioning holes formed in the work body W are provided.
While the work body W is positioned and placed by the work body 12, the work body W is moved in accordance with the driving force of the conveying means (not shown).
The setting station, the welding station and other work stations are intermittently fed.

The slide base 4 is slidably driven in the direction of arrow A by a first slide driving means 15 having a drive motor 14 for screw-sending a slide block 13 provided on the lower surface of the slide base 4, and along the traveling rail 2. It is configured to move on the frame base 3 in the opposite direction.

Further, the slide tower 5 is provided with a second slide drive means 18 having a drive motor 17 for screw-sending the slide block 16 provided on the lower surface thereof.
The traveling rail 2 is slid in the direction of the arrow B,
The pallet trolley 1 is composed of a pallet truck 1 configured to move from a position separated from a transport path to a position approaching the transport path, and the holding frame 6 screw-feeds an elevating block 19 provided at its base end portion. It is configured to be driven up and down in the direction of arrow C in the slide tower 5 by the lifting drive means 21 having the drive motor 20 that operates.

The holding frame 6 has a pair of upper and lower portions for holding the upper end and the lower end of a welded work Y, which is a side sill inner panel welded to the side end of the work main body W, in pressure contact with the holding frame 6. A gripping arm 22,
A holding member including a locking pin 23 that is inserted into a positioning hole formed in the welded work Y and locked therein is provided.

As shown in FIGS. 3 and 4, the gripping arm 22 has an actuating rod 2 whose base end is a drive cylinder 24.
4a is connected via a connecting pin 25, and an intermediate portion is connected to a support link 26 so as to be swingably supported. Then, the operating rod 24a of the drive cylinder 24 projects from the retracted position shown in FIG. 3 to the advanced position shown in FIG. 4 and the support link 26 undulates, so that the tip end of the gripping arm 22 separates from the welding work Y. It is configured to be swingably displaced from the expanded position described above to the gripping position where it abuts on the welding work Y.

As shown in FIGS. 5 and 6, the locking pin 23 has a pin body 28 having a diameter smaller than that of the positioning hole 27 formed in the welding work Y, and is slidable in the pin body 28. It has a pair of retaining pins 29 supported by. Then, as shown in FIG. 5, with the retaining pin 29 stored in the pin body 28,
After the pin body 28 is fitted into the positioning hole 27 of the welding work Y, the retaining pin 29 is pulled toward the driving cylinder 30 side by the driving cylinder 30 provided at the base end portion of the retaining pin 29, as shown in FIG. As shown in FIG. 5, the tip of the retaining pin 29 is projected outward of the pin body 28 and brought into contact with the peripheral edge of the positioning hole 27. The retaining pin 29 serves to prevent the welding work Y from retaining. It is designed to be locked.

That is, the retaining pin 29 is formed with a guide groove 31 formed of an elongated hole extending in the axial direction thereof, and the supporting portion 32 of the retaining pin 29 is fitted into the guide groove 31. A guide pin 33 is provided, and when the retaining pin 29 is projected forward by the drive cylinder 30, the guide pin 33 is fitted into the drive portion 31a extending obliquely outward from the base end portion of the guide groove 31. As a result, the tip of the retaining pin 29 is pushed inward and retracts into the pin body 23 (see FIG. 5), and when the retaining pin 29 is pulled rearward by the drive cylinder 30, the guide pin 33 is moved. From the drive portion 31a to the guide groove 31
By being introduced into the main body of the
The tip end of the pin is pushed outward to project outside the pin body 23 (see FIG. 6).

When performing a welding operation using the positioning device having the above construction, the slide tower 5 and the holding frame 6 are set at a standby position separated from the conveying path of the pallet truck 1 and a holding member is constructed. Gripping arm 2
2 is set to the expanded position shown in FIG. 3 and the retaining pin 29 of the locking pin 23 is set to the retracted position shown in FIG. 5, the welding work Y is attached to the holding frame 6 and its positioning is performed. After inserting the locking pin 23 into the hole 27, the gripping arm 22 is moved by the drive cylinder 24.
4 is swing-displaced to the gripping position shown in FIG. 4, and the retaining pin 29 is displaced to the retaining position shown in FIG. 6 by the drive cylinder 30 to hold the welding work Y on the holding frame 6. ..

Then, when the work body W placed on the pallet truck 1 is carried to the welding station by the carrying means (not shown), the slide tower 5 and the holding means are held by the moving means composed of the second slide driving means 18. By slidingly displacing the frame 6 in the direction of approaching the conveyance path of the pallet truck 1, the inner end surface of the welding work Y is brought into contact with the outer end surface of the work body W and set at the welding position. Next, the welding work Y is attached to the work body W by spot welding the predetermined welding spots by a welding robot or the like installed in the welding station.

After that, the gripping arm 22 is pivotally displaced to the expanded position, and the retaining pin 29 is slid to the retracted position to release the restraint state of the welding work Y, and then the second slide is performed. The slide tower 5 and the holding frame 6 are slid by the driving means 18 in the direction in which the slide tower 5 and the holding frame 6 are separated from the conveyance path of the pallet truck 1, thereby returning to the standby position.

The slide tower 6 for supporting the holding frame 6 and the holding member as described above is moved to the standby position separated from the transfer path (travel rail 2) of the pallet truck 1 by the moving means including the second slide driving means 18. Since it is configured to be moved to the welding position on the transport path, the welding work Y can be easily mounted while the holding frame 6 is positioned at the standby position, and the gripping arm 22 and The welding work can be performed by the welding device in a state where the welding work Y held by the holding frame 6 by the holding member including the locking pin 23 is moved to the welding position and accurately positioned.

Since the positioning device for positioning the welding work Y is installed in the work station arranged along the conveying path of the pallet carriage 1, the pallet is compared with the case where the positioning device is installed on each pallet carriage 1. It is possible to reduce the weight of the carriage 1 and prevent the positioning device from interfering with the work on the pallet carriage 1 when performing a work other than the welding work.

Further, in a welding line for welding different types of works while continuously transferring them, the work body W is
If the width dimension of the welding work Y changes depending on the type of the work, by increasing or decreasing the moving amount of the welding work Y by the moving means, the setting position of the welding work Y can be accurately and easily adjusted in accordance with the above-mentioned size change. Since the welding work Y can be adjusted, the welding work can be properly performed in a state where the welding work Y is reliably brought into contact with the outer end portion of the work body W.

Further, the elevating and lowering drive means 21 for vertically moving the welding frame 6 and the holding member in the direction of arrow C along the guide bar provided on the slide tower 6, the slide tower 6 and the slide base 4 to the work body W.
To slide and displace in the direction of arrow A along the transport path of the first
Since the adjusting means including the slide driving means 15 is provided, when the type of work changes, the welding work Y
It is possible to accurately and easily adjust the holding position of the welding work Y, which is composed of the holding height and the holding position, according to the type of work.

Incidentally, in the above embodiment, the above-mentioned is applied in the direction (arrow A direction) orthogonal to the moving direction (arrow B direction) of the moving means composed of the second slide driving means 18 for moving the holding frame 6 and the slide tower 5. It comprises a first slide drive means 15 for moving the holding frame 6 and the slide base 4, and a lifting drive means 21 for vertically moving the holding frame 6 along the guide member of the slide tower 5 in the vertical direction (direction of arrow C). The example in which the holding frame is configured to move in the three-dimensional direction by providing the adjusting means has been described, but either the first slide driving means 15 or the elevating and lowering driving means 21 may be omitted. ..

[0024]

As described above, according to the present invention, the welding work is held by the holding member, and the holding member is moved from the standby position to the welding position by the moving means. Since it can be set in a state where it is positioned on the work body on the trolley, the weight of the pallet trolley can be reduced and the weight of the pallet trolley can be reduced compared to the case where the positioning device is installed on each pallet trolley. There is an advantage that it is possible to prevent a situation in which the positioning device becomes an obstacle when the work other than the welding work is performed on the work.

When the type of work is changed,
By adjusting the holding position of the welding work by the holding member by the adjusting means and changing the moving distance of the holding member and the welding work by the moving device, the setting position of the welding work can be set in correspondence with the change of the type of the work. There is an advantage that it can be easily and properly set.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a welding work positioning apparatus according to the present invention.

FIG. 2 is a plan view showing an installation position of the positioning device for the welding work.

FIG. 3 is a partially enlarged front view showing a state before the welding work is attached to the holding frame.

FIG. 4 is a partially enlarged front view showing a state in which a welding work is held by a holding frame.

FIG. 5 is a cross-sectional view showing a retracted state of the retaining pin.

FIG. 6 is a cross-sectional view showing a locked state of a retaining pin.

FIG. 7 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pallet trolley 2 Traveling rail (conveyance path) 15 1st slide drive means (adjustment means) 18 2nd slide drive means (movement means) 21 Elevating drive means (adjustment means) 22 Grasping arm (holding member) 23 Locking pin ( Holding member) W work body Y Weld work

Claims (1)

[Claims] 1. A positioning device for setting a welded work to be welded to a work main body, which is placed on the pallet trolley and conveyed, in a state in which a welding work to be welded to the work main body is set. A holding member that detachably holds the welding work at a welding station arranged along the welding station, an adjusting unit that adjusts a holding position of the welding work by the holding member according to the type of the work body, and a holding member. And a moving means for moving the welding position from a standby position separated from the transfer path to a welding position on the transfer path.