JPS6228597Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a workpiece holding device for a conveyance device used in a welding device or the like.

More specifically, holding means are attached to a pair of transfer bases so as to be able to move up and down, and each holding means is provided with a clamping mechanism that does not interfere with each other so that at least a part of the holding means enters the other side, and each clamping mechanism holds the workpiece. It is possible to simultaneously hold and release a part of the workpiece at the processing position, and it is possible to transport and hold the workpiece from the loading position to the processing position using one transport base, and transfer it to the other transport base at the processing position. The workpiece can be transferred, held, and transported to the unloading position using two transport bases without interfering with the processing at the processing position, and can be transferred while processing continues, and is especially useful for welding equipment. The present invention relates to a work holding device for a conveyance device that improves work efficiency and simplifies devices, lines, and equipment.

For example, for workpieces such as automobile bodies, the temporarily attached workpieces flowing on the main conveyor are transferred to a charging trolley, transported to a welding device, then transferred to a trolley dedicated to the welding equipment, and then transferred to a holding truck. The welded workpieces are clamped and welded, then transferred to the above-mentioned cart again, and the welded workpieces are then transferred to the delivery cart and delivered to the main conveyor. Such conventional devices are
In addition to two trolleys for loading and unloading, it requires a transfer device for loading and unloading into the welding equipment, a fixing jig for positioning the workpiece, and clamping, making the equipment larger, more complex, and more expensive. In addition, transfer, positioning, etc. at the welding position result in loss time, which is disadvantageous in terms of time economy, and it is difficult to expect efficient welding.

The present inventors devised the present invention in order to solve the above-mentioned problems of the conveying device used in the welding device.

The object of the present invention is to attach holding means to be able to move up and down on a pair of transport bases, each holding means is equipped with a clamping mechanism that does not interfere with each other and that at least a part of the holding means enters the other side, and each clamping mechanism is attached to a workpiece. It is possible to simultaneously hold and release a part of the workpiece at the processing position, and the two transfer bases and the attached clamp mechanism allow processing to be carried out without interfering with the workpiece processing at the processing position. To provide a work holding device for a conveying device, which enables workpieces to be transferred between each other while continuing, and which is particularly used in welding equipment to improve work efficiency and simplify equipment, lines, and equipment. .

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic plan view of a welding line as a workpiece processing device including the device according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a side view of the same without the welding device.

Reference numeral 1 denotes a rail base frame of a conveying device that is laid parallel to a part of the main conveyor line A, and welding devices 50 and 60 are arranged on both left and right sides of the central part in the length direction so as to sandwich the base frame 1. installed, welding equipment 50, 60
are gun arms 51 that open and close up and down as if facing each other,
It is equipped with a welding mechanism such as 61, and constitutes a spot welding machine.

On the base 1, trolleys 10 and 30, which are transport bases, are provided so as to be movable along the base frame 1.
0 and 30 are reciprocated by cylinder units 2 and 3, one 10 is used as a charging cart for transporting the workpiece W from the starting point a to the welding position b, and the other 30 is used to transport the workpiece W from the welding position b to the discharging position c. It is used as a dispensing trolley.

The loading trolley 10 and the dispensing trolley 30 have the same structure and are arranged symmetrically on the base frame 1, and the structure is similar to that of the fourth
As shown in FIGS. 4 to 6,
In the figure, the dispensing trolley 30 side is shown by a solid line.

The trolley 30 includes a base 31 that runs on the base frame 1 with rollers 32, two guide posts 33, 33 set up on the base 31, and a pedestal 34, and the pedestal 34 has guide sleeves hanging down on the left and right sides of the base 31. 34a, 34a
The center part of the pedestal 34 is connected to the rod 37a of the vertical cylinder unit 37 which is slidably fitted to the posts 33, 33, and is set up on the base 31, and when the cylinder unit 37 is driven, the pedestal 34 is slidably fitted to the posts 33, 33. 3
3, it moves vertically up and down. A support 36 is disposed on the pedestal 34, and one side of the flat main body 36a of the support 36 has an extension portion 36 bent diagonally downward.
b, and the end of this extending portion 36b is pivotally attached to a bracket 34b provided on the pedestal 34 with a pin 35.
The tip of a rod 38a of a horizontal cylinder unit 38 is pivotally attached 38b to the intermediate portion of this extending portion 36b, and the base of the cylinder unit 38 is pivotally attached 38c to a support member 34c at the end of a support 36 that stands up on one side of the pedestal 34. Ru. The support 36 is driven by this cylinder unit 38.
The support base 36 can be pivoted about the pin 35 as a fulcrum from the fallen state shown by the solid line, and can be raised as shown by the chain line, that is, the support base 36 can be raised and lowered.

Movable claws 39a, 39a constituting the clamp mechanism 39 are each pivotally supported on both sides of the support base 36 by pins 39b, and each claw 39a, 39a has a clamp cylinder unit 40 with each outer end vertically disposed on the support base 36. The claw 39a,
Immediately below the inwardly facing tip of each of the fixing claws 41, 41 are installed on the support base 36, and a second fixing claw 42, 41 is installed on the inside of each fixing claw 41, 41. 42 are similarly installed, and the claws 41, 42
The upper surface is formed along the surface of the workpiece W to be clamped, and the movable claw 39a is similarly formed.In particular, the inner fixed claws 42, 42 are extended in the direction of the other truck 10, and the movable claws 39a are formed along the surface of the workpiece W to be clamped. It is formed long enough to support the entire surface.

The loading cart 10 has exactly the same structure, with posts 13,
It includes a pedestal 14, a support 16, a clamp mechanism 19 including claws 21, cylinder units 17, 18, etc.
The fixing claw 22, which is similar to the elongated second fixing claw described above, is provided offset in the width direction so as not to interfere with the claw 42 of the dispensing cart 30, as shown in FIG. That is, the fixed claws 22, 42 of the carriages 10, 30 are configured to enter between the opposing claws.

Next, the transportation and welding process of the workpiece W will be explained. The workpiece W is clamped and transported by the feeding cart 10 to the welding position b. In this state, the workpiece W is clamped on the support base 16 by the clamp mechanism 19, the entire lower surface of the workpiece W is supported by the second claw 22, and the workpiece W is supported by the first claw 21 and the movable claw 19a of the clamp mechanism 19. A part of the lower surface of W is clamped. A delivery trolley 30 is placed at welding position b.
is waiting, approaches this at the transfer limit position, and this limit position is between the stopper 1a on the base frame 1 side and the trolley 1.
Stopper 43, 2 provided on the opposing surface on the 0, 30 side
3. Platform 3 of waiting trolley 30
4 is in the lowered position, and the movable claws 39a, 39a
is also in an unclamped state and in a standing state,
At the stop position of the truck 10, the frame 34 on the truck 30 side is raised, whereby the fixing claw 42 enters the lower side of the workpiece W through between the opposing claws 22, comes into contact with the lower surface of the workpiece W, and stops. Subsequently, the released movable claw 39a of the clamp mechanism 39 is closed by the cylinder unit 40, and a part of the workpiece W is clamped and held between the claws 39a and 41. Next, the clamp mechanism 19 of the trolley 10 is released, the frame 14 is lowered, the workpiece W is released from the trolley 10, and the trolley 10 is moved to the starting point a.
will be returned to.

In this way, the welding process is continued at welding position b without changing the posture of the workpiece W.
can be transferred from the trolley 10 to the trolley 30,
After being transferred and processed, the cart 30 is transported to the unloading position c, and the horizontal cylinder unit 38 is moved to the unloading position c.
The support stand 36 is erected and the workpiece is transferred to the main conveyor line A. The charging cart 10 receives the work from the main conveyor line A in the same manner.

Although the illustrated embodiment has been implemented on a welding line, the present invention is not limited to this, and can be implemented on any processing line.

As is clear from the above, according to the present invention, it is possible to transfer and hold a workpiece between two carts while holding it in a processing posture, and there is no need to provide separate devices for transfer and processing holding as in the past. do not have. Therefore, there is little loss time, welding processing, etc. can be carried out efficiently, and work efficiency can be significantly improved, and the configuration of the welding line etc. can be simplified because there is no need to separately install a holding device or transfer device between the carts. , it is possible to simplify the equipment and downsize the lines, etc., and the structure also has a clamping device that goes into the other party, lifting, lowering, etc. so as not to interfere with the structure as described above.
It has many advantages, such as just adding a raising/lowering cylinder etc., the structure of the device itself is simple, automation is easy, and it can be done reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the entire device, Fig. 2 is a front view of the same, Fig. 3 is a side view of the same, and Fig. 4 is a front view of one of the holding devices. ,
FIG. 5 is a side view of the same, and FIG. 6 is a plan view of the same. In addition, in the drawing, 10 and 30 are transfer bases, and 34 and 1
4, 37, 17 are elevating means, 39, 41, 42,
19, 21, and 22 are holding means.

Claims (1)

[Scope of Claim for Utility Model Registration] In a conveyance device that conveys a workpiece held at a loading position by a holding means attached to the conveyance base to a processing position, or from the processing position to a payout position by moving the conveyance base, The transfer base includes a work loading base 10 which is equipped with a work holding means and transports the work from a loading position to a processing position, and a work loading base 10 which is also equipped with a work holding means and transports the work from the processing position to the unloading position. and a workpiece discharging base 30, wherein the holding means for the workpiece inputting base 10 and the workpiece discharging base 30 are prevented from interfering with each other when both the bases 10, 30 are stopped at the processing position. Fixing claws 22 and 42 for supporting the workpiece that can be inserted into the workpiece, and a clamp mechanism that holds a part of the workpiece at the same time to process the workpiece when both bases 10 and 30 are stopped at the processing position, and releases the holding after processing. A workpiece holding device for a conveying device, characterized in that it is comprised of the following.