JPH0232079B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention primarily relates to an apparatus for performing welding and other processing on automobile body frames and other large workpieces.

Conventionally, as this type of device, for example, the Japanese Patent Publication No. 56-7473
As seen in the publication, a setting trolley on the upper surface of which a workpiece can be assembled is provided so as to be able to reciprocate along a guide rail on the machine platform between a rear setting position and a front processing position. There is a known system in which the cart is movable upward at the processing position and welding or other processing is performed on the workpiece at the upward movement position. The general type is a type that is moved up and down by a link type or other drive mechanism on the lower side via the machine base on the lower side, and in such a type, the member that is moved up and down is large overall In addition, it inevitably becomes heavy, complicated, and expensive, and it is necessary to provide a recess at a low cost in preparation for installing the drive mechanism, which is troublesome.

The object of the present invention is to provide a device free of such inconveniences, and a setting cart for setting a workpiece so that it can be freely assembled on its upper surface is moved along a guide rail on the machine stand to a rear setting position. In a workpiece processing device, the workpiece is provided so as to be movable back and forth to a front processing position, and is configured to move a set cart upward at the processing position and perform welding or other processing on the workpiece at the upper movement position. Provided with a support stand that engages with guide rails on the side surfaces of the main pillars erected on both sides of the machine stand and is connected to a drive source above the main pillars and moves up and down;
The present invention is characterized in that the support stand is provided with a split type connecting rail of the guide race and a support arm that supports the lower surface of the set truck.

An example of implementing the present invention will be explained with reference to the attached drawings. In the drawing, 1 is a workpiece A placed on the upper surface via a setting jig 1a.
The figure shows a setting trolley to which a machine can be freely assembled, and the trolley 1 can be freely reciprocated between a setting position A at the rear and a processing position B at the front along a pair of left and right guide rails 3, 3 on a machine base 2. Prepare for. In the illustrated example, the trolley 1
A dispensing cart 4 is prepared at a position in front of the processing unit 4 so as to be freely connected to the dispensing cart 4. According to the reciprocating movement of the cart 1 described above, this reciprocating movement is performed between the processing position B described above and the dispensing position C in front of the processing position B. Thus, when the aforementioned trolley 1 is retreated to the setting position A and is prepared for setting the next workpiece a, the trolley 4 is
Along with this, the trolley 1 moves back and is at the machining position B so that it can receive the workpiece a left after being previously machined at the upper position, and then the trolley 1 moves forward and is at the machining position B. When the workpiece is guided to the workpiece a, the workpiece is guided to the delivery position C in front of the workpiece a, and is thus prepared for the delivery of the workpiece a.

Although the above is not particularly different from the conventional one, according to the present invention, on the machine stand 2 at the processing position B,
A support stand 5 having a support arm 5a extending from the lower surface of the cart 1 is installed horizontally, and is movable up and down by a drive cylinder or other drive source 6 on the upper side. According to the upward movement, it is supported from the lower surface by the support arm 5a and can freely move upward while leaving the rails 3, 3 and the machine base 2 on the lower side.
Welding or other processing is performed on the workpiece a at the upward movement position.

More specifically, the support stand 5 engages with a pair of left and right support columns 7, 7 on both outer sides fixed on the machine stand 2, and a pair of left and right guide rails 8, 8 on the inner side facing each other. It is supported so as to be movable up and down, and is connected to a pair of left and right drive cylinder type drive sources 6, 6 on the upper side via respective rods 9, 9, so that it can be driven up and down by the drive sources 6, 6. Furthermore, the support stand 5 is of a type having a pair of support arms 5a on the left and right sides extending forward, and furthermore, in its downward movement position, it is in a slightly lower position beyond the guide rails 3, 3, and its upper surface is a split-type connecting rail 3a that connects the front part and the rear part of the guide rails 3, 3;
3a is fixedly installed.

Furthermore, the above-mentioned pair of left and right columns 7, 7, together with the pair of left and right columns 10, 10 in front thereof, form a generally rectangular machine frame 11 as a whole, and the upper movement position of the workpiece a is located on both outer sides of the intermediate part. At least one pair of left and right welding guns 12 are provided to face and weld the work piece a, and an upper jig 13 is provided in the middle upper side thereof to hold the work piece a at the upper moving position or a further upper position.
We prepared the following.

In the drawings, reference numeral 14 indicates a chain for driving the truck, and reference numeral 15 indicates a front drive sprocket that engages with the chain, and the sprocket 15 is driven by a drive motor 16 on its side.

To explain its operation, the setting cart 1 is returned to the setting position A, and the workpiece A is set on the upper surface thereof, and then it is advanced to the machining position B in front of it, and then the support table 5 is moved upward. Then, the lower surface of the trolley 1 is supported by a support arm 5a extending from the support stand 5, and accordingly moves upward, and at the upward movement position, welding or other processing is performed on the workpiece a on the upper surface. Ru. During this upward movement, the bogie 1 is moved upward by itself, leaving the pair of guide rails 3, 3 on the lower surface and the machine platform 2 on the lower side as they are; The structure can be simplified and the operation can be made easier than in the case of the conventional method.

The support stand 5 then moves down and the setting cart 1 is returned to the initial setting position A to prepare for setting the next workpiece a. It is guided to a dispensing position C in front of the trolley 4, and can be freely dispensed.

In this way, according to the present invention, at the processing position B provided along the guide rails 3, 3 on the machine stand 2, the guide rails 8, 8 on the sides of the main columns 7, 7 erected on both sides of the machine stand 2 are placed. A support stand 5 is provided which engages with the support stand 5 and moves up and down by being connected to a drive source 6 on the upper part of the support columns 7, 7, and the support stand 5 is connected to the split type connecting rails 3a, 3a of the guide rails 3, 3 and the above-mentioned guide rails 3, 3. Support arms 5a, 5a that support the lower surface of the set trolley 2 on the guide rails 3, 3
Since the set trolley 2 can freely move in and out of the machining position B, the set trolley 2 at the machining position B can leave the guide rails 3, 3 and the machine base 2 by raising the support stand 5. The support table 5 is moved upward, making it easier to process the workpiece, and the support table 5 has the advantage of being lighter and smaller than the conventional guide rails 3, 3 and the machine stand 2 that are also moved upward. have

[Brief explanation of drawings]

FIG. 1 is a side view of one example of the device of the present invention, FIG. 2 is a plan view of the apparatus with the cart removed, and FIG. 3 is a rear view thereof. a...Workpiece, 1...Set trolley, 2...Machine base, 3, 3...Guide rail, A...Set position,
B... Processing position, 5a... Support arm, 5... Support stand, 6... Drive source.

Claims (1)

[Claims] 1. A setting trolley for freely assembling a workpiece onto the upper surface is provided so as to be movable back and forth along a guide rail on the machine base to a rear setting position and a front processing position, and the setting trolley is set at the processing position. In a workpiece processing device that is moved upward and performs welding or other processing on the workpiece at the upward movement position, the workpiece is engaged with a guide rail on the side of a main column erected on both sides of the machine stand at the processing position. A support stand connected to a drive source above the main column to move up and down is provided, and the support stand is provided with a split connecting rail of the guide race and a support arm supporting the lower surface of the set cart. Characteristic workpiece processing equipment.