JPS6067040A - Exchange device of jig - Google Patents

Abstract

PURPOSE:To enable a jig to be promptly replaced, by turning a turning shaft horizontally provided on the upper part of a machine frame by an indexing device and inverting an optional set of the jigs provided in this indexing device to be selected in a bottom operating position, in the case of a welding device. CONSTITUTION:A turning shaft 3 hozirontally mounted onto the upper part of a machine frame 1 is turned by an indexing device 6. This device 6 turns the turning shaft 3 by longitudinally moving a rack 8, on the machine frame 1, meshed with a pinion 7 of the turning shaft 3 by a cylinder 9, positioning the turning shaft 3 in such a manner that a stopper 11 oppositely provided on the machine frame 1 is engaged with a groove 10a, selected by a cylinder 12, on an indexing plate 10 having the indexing grooves 10a in three places of the turning shaft 3. Then a change of the kind of a work W can be easily met by inverting three sets of jigs 2, which hold the work W, in a bottom operating position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves mounting a jig for holding a workpiece downward on the upper part of a machine frame set upright at a working position, and performing welding or other predetermined operations on the workpiece held by the jig. This invention relates to a jig changing device that operates on a welding device or the like that performs processing.

Conventionally, in this type of welding equipment, the workpiece is transported by a trolley into the space below the working position surrounded by the machine frame, and the workpiece on the trolley is lifted and placed downward on the upper part of the machine frame. It is configured to be delivered to a tool and welded to it, but when changing the model of the workpiece, the jig must be suspended by a crane, etc., and the jig P attached to the top of the diagnostic machine frame is replaced. It is generally used to carry out operations, and it comes with the disadvantages of poor workability and safety.

In order to eliminate such inconveniences, the present invention aims to provide a jig changing device in which a plurality of jigs are prepared in advance on a machine frame and can be selectively operated. A jig for holding a workpiece is mounted downward on the upper part of a machine frame set up at a working position, and the workpiece held by the jig is subjected to welding or other prescribed processing.
A rotating shaft is installed horizontally on the upper part of the machine frame, a plurality of jigs are supported around the rotating shaft via each support member, and the rotating shaft is connected to an indexing device connected to the rotating shaft. It is characterized in that one of these three ff tools can be selectively reversed in any position by rotating.

Next, the present invention will be explained with reference to the illustrated embodiments.

In the drawing, (1) shows the machine frame installed upright at the cutting position, (2) shows the jig that holds the workpiece W, and the jig (2) shows the base frame (
2a) is provided with a plurality of clamp members (2b) for gripping the workpiece W. According to the present invention, a rotating shaft (3) is installed horizontally on the upper part of the machine frame (1). A plurality of jigs (2) are supported around the jigs (2) via respective support members (4).
A shaft support (51 (51) on both the front and rear sides is protruded from the upper part of the machine frame (1), and the rotation shaft (3) is supported thereon.
), arm-shaped support members (4) extending radially outward are provided protruding at three locations in the circumferential direction at intervals in the front and rear, and the bases of each jig (2) are attached to these support members (4). The plate (2a) was attached and the jigs (2) were placed around the rotation shaft (3), a total of six jigs.

The pivot shaft (3) is indexed by an indexing device (6), which is arranged on the machine frame (1) in engagement with a pinion (7) on the pivot shaft (3). a rotational drive mechanism that rotates the rotation shaft (3) by advancing and retracting the rack (8) with a shilling (9);
) top circumference 6ff! The frame (of the index play) (10) with the index W (10a) at
1) It is composed of a positioning mechanism that positions the rotation shaft (31) so that the upper stopper αD can be freely engaged and detached from each groove (10a) by the cylinder θ force, and the rotation shaft (31) is configured by the cooperation of both mechanisms. 3) is rotated at a predetermined angle as appropriate, and six jigs (
Any one of 2) can be selectively reversed to a lower operating position. Therefore, when changing the model of the workpiece W, the corresponding jig (2) can be reversed to the lower operating position to easily handle the model change.

In this way, according to the present invention, the rotating shaft installed horizontally on the lid (above the machine frame) is rotated by the angle of the indexing device, and any of the plurality of jigs provided around Jh of the rotating shaft is rotated. One unit can be selectively reversed to the lower operating position, making it possible to easily and quickly change jigs when changing workpiece models, improving productivity, and further improving the efficiency of each jig change. This has the effect of improving safety since there is no need to carry the jig with a crane or the like.

[Brief explanation of the drawing]

FIG. 1 is a side view of one example of the device of the present invention, FIG. 2 is a front view thereof, and FIG. 5 is a front view of the positioning mechanism portion of the indexing device. (11... Machine frame (2)... Jig (3)... Rotating shaft (4)... Support member (6)... 2 people outside the indexing device Fig. 1 Fig. 2

Claims (1)

[Claims] A jig for holding a workpiece is mounted downward on the top of a machine frame set up at a working position, and the workpiece held by the jig is subjected to welding or other specified mechanical work. A rotating shaft is installed horizontally on the upper part of the machine frame, a plurality of jigs are supported around the rotating shaft via each support member, and the rotating shaft is rotated by an indexing device connected to the rotating shaft. A jig changing device characterized in that any one of these jigs can be selectively reversed to a lower operating position by moving the jig.