JP2618182B2 - Clamper drive for pallet jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamper driving device used for releasing a clamped state of a clamper provided on a pallet jig.

[0002]

2. Description of the Related Art Conventionally, for example, when performing predetermined processing on a work such as a crankcase of a motorcycle, the crankcase is fixed to a pallet jig, and the crankcase is positioned via the pallet jig. A predetermined process such as drilling or milling is performed.

In order to fix a work such as the above-mentioned crankcase to a pallet jig, a plurality of clampers previously mounted on the pallet jig are used. There are various types of clampers, one of which is a type that clamps by the biasing force of a built-in spring and releases the clamp by hydraulic pressure generated from a hydraulic generator provided on a pallet jig. There is. Conventionally, the operation of the hydraulic generator for releasing the clamp has been performed by a nut runner. That is, the rotation of the output shaft of the nut runner is converted into a pressing force, and the pressing force is used to press the cylinder of the hydraulic generator.

[0004]

However, in the clamper driving device using the nut runner as described above, the hexagonal hole provided at the tip of the output shaft of the nut runner is fitted to the nut-like member on the hydraulic pressure generator side. Work is required, and the fitting work is troublesome. Since it is a structure that converts rotation into pressing force, it takes a relatively long time to unclamp. There are drawbacks such as a complicated structure and high cost.

In order to cope with such a drawback, it is conceivable to directly press the hydraulic generator using a hydraulic or pneumatic cylinder instead of the nut runner. However, in this case, the pressing force of the cylinder is directly applied to the hydraulic generator, but since the hydraulic generator is usually arranged at the end of the pallet jig, an excessive moment acts on the pallet jig after all. As a result, actual implementation was difficult.

The present invention has been made in view of the above circumstances, and can be easily set to a hydraulic generator, can be set to an unclamped state in a short time, and has a simple structure and can reduce cost. Another object of the present invention is to provide a clamper driving device in a pallet jig in which an extra force such as a moment does not act on the pallet jig.

[0007]

According to the present invention, in order to achieve the above object, an operation of pressing a cylinder of a hydraulic generator on a clamper driving device body movably arranged in a direction approaching a pallet jig. A cylinder for operation is provided so that its axis is parallel to the axis of the cylinder of the hydraulic generator and movably in the axial direction, and an engagement flange provided on the hydraulic generator is provided on the cylinder body of the operating cylinder. The configuration is such that an engaging portion that engages with the portion is provided integrally.

[0008]

After the main body of the clamper driving device is moved to the pallet jig and the operating cylinder is positioned coaxially with the cylinder of the hydraulic generator, the hydraulic generator is pressed by the operating cylinder. At this time, since the operating cylinder is movable, it first moves in a direction away from the hydraulic generator due to a reaction when pressing the hydraulic generator, and therefore cannot strongly press the hydraulic generator. . When the operating cylinder moves in the direction away from the hydraulic pressure generator in this way, the engaging portion of the operating cylinder engages with the engaging flange provided on the hydraulic pressure generator. After the engagement, the movement of the operation cylinder is restricted, so that the operation cylinder strongly presses the hydraulic pressure generator. At this time, as described above, the hydraulic generator is supported by the engaging portion extending from the cylinder body of the operating cylinder, and therefore, the pressing force of the operating cylinder against the hydraulic generator and the operation of the hydraulic generator by the operating cylinder The bearing force acts and reacts to cancel each other out. As a result, no load is applied to the pallet jig, and, of course, no moment acts.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a clamper driving device in a pallet jig according to the present invention, and FIG. 2 is a plan view of the same. In the figure, reference numeral 1 denotes a pallet jig, which includes a plurality of clampers (not shown) for fixing a work at a predetermined position. The clamper clamps the work by the biasing force of a built-in spring. The clamp is released from the hydraulic generator 2 disposed at the end of the pallet jig 1 via the oil passage 2a. This is performed by supplying hydraulic pressure.

Reference numeral 5 denotes a clamper driving device for generating a hydraulic pressure by pressing the cylinder 3 of the hydraulic pressure generator 2 and supplying the hydraulic pressure to the clamper to release the clamp. The clamper driving device 5 includes a support frame 6, a clamper driving device main body 8 which is guided by guides 7 and 7 attached to the support frame 6 and is provided so as to be able to approach and separate from a transfer line of the pallet jig 1. A moving cylinder 9 for moving the clamper driving device main body 8 and an operating cylinder 10 for pressing the cylinder 3 of the hydraulic pressure generator 2 are provided.

The operation cylinder 10 is vertically movably fitted in a sleeve 11 provided on the upper part of the clamper driving device main body 8, whereby the axis of the operation cylinder 10 is aligned with the hydraulic generator 2.
Are arranged so as to be parallel to the axis of the cylinder 3. Further, the operating cylinder 10 is pressed downward by a spring 12 interposed between a step provided on the outer peripheral surface of the cylinder body 10a and a step provided on the inner peripheral surface of the sleeve 11, Usually, it is lowered to a lower movement limit position regulated by a stopper (not shown). When hydraulic pressure is supplied to the upper oil chamber 10b in the operating cylinder 10, the piston 10c and the piston rod 10d integrated therewith move relatively downward with respect to the cylinder body 10a, and move downward. When the oil pressure is supplied to the oil chamber 10e on the side, the piston 10c and the like relatively move relatively upward.

On the other hand, a ring groove 4 is formed on the outer periphery of the upper part of the hydraulic pressure generator 2, whereby an engagement flange 4 a is formed on the upper part of the ring groove 4. Operating cylinder 10
An L-shaped connecting member 13 is attached to a lower portion of the operating cylinder 10 with a bolt 15 via the connecting member 13 to engage with the engaging flange 4a.
It is attached integrally with.

The engaging portion 14 is formed in a U-shape in a plan view, and has an opening at a side portion facing the hydraulic generator 2 side. The moving cylinder 9 is extended to operate the clamper. When the apparatus main body 8 is moved toward the pallet jig 1, the engaging portion 14 fits into the ring groove 4 of the hydraulic pressure generator 2. The height of the engaging portion 14 is set to be smaller than the groove width of the ring groove 4.

Reference numeral 16 denotes a positioning pin attached to the side of the clamper driving device main body 8 on the side of the hydraulic pressure generator.
When the moving cylinder 9 is extended and the clamper driving device body 8 is moved toward the pallet jig 1, the positioning pins 16 are fitted into grooves 17 provided on the side of the hydraulic generator 2. The upper and lower and left and right relative positions of the clamper driving device main body 8 with respect to the pallet jig 1 are determined.

Reference numeral 18 denotes a proximity switch for detecting the vertical position of the detection rod 10f extending upward from the piston 10c of the operation cylinder 10, 19 a proximity switch for detecting the horizontal position of the clamper driving device main body 8, and 20. Reference numeral denotes an adjustable stopper that determines a limit position of movement of the clamper driving device main body 8 to the pallet jig 1.

Next, the operation of the clamper driving device in the pallet jig having the above configuration will be described. When the pallet jig 1 moved along the transfer path is stopped at a predetermined position, the moving cylinder 9 is driven to extend and moves the clamper driving device main body 8 to the pallet jig 1 side. At this time, the positioning pins 16 are fitted into the grooves 17 on the side of the hydraulic generator 2, and the pallet jig 1 is relatively positioned in the left-right direction and the up-down direction with respect to the clamper driving device main body 8. At the same time, the operating cylinder 10 is
(See FIG. 3).

Next, when a hydraulic pressure is supplied into the oil chamber 10b on the upper side of the operating cylinder 10, the piston 10c and the piston rod 10d move downward and first contact the upper surface of the hydraulic pressure generator 2. Then, the operation cylinder 10
Is further extended, the cylinder rod 1d is conversely pressed by the reaction force of the piston rod 10d against the hydraulic generator 2.
Oa is moved upward against the spring 12. When the engaging portion 14 attached to the cylinder body 10a via the connecting member 13 comes into contact with the lower surface of the engaging flange 4a, further upward movement of the cylinder body 10a is restricted (FIG. 4). reference).

Thereafter, when the oil pressure is further supplied to the oil chamber 10b, the piston 10c and the piston rod 10d move downward, and strongly press the piston rod of the cylinder 3 in the oil pressure generator 2. As a result, a hydraulic pressure is generated in the hydraulic pressure generator 2, and the generated hydraulic pressure is supplied to each clamper (not shown) via the oil passage 2a to release the clamped state.

The hydraulic pressure generator 2 has a piston rod 10d.
However, at this time, the hydraulic pressure generator 2 is supported by an engaging portion 14 extending downward from the cylinder body 10a of the operating cylinder 10, and the supporting force of the engaging portion and the piston rod 10d The pressing force applied to the hydraulic pressure generator 2 is a relation of action and reaction, and cancels each other. Therefore, no excessive load is applied to the pallet jig 1 and, of course, no moment acts.

As described above, since no load is applied to the pallet jig 1 when the hydraulic pressure generator 2 is strongly pressed by the operating cylinder 10, the pressing force of the operating cylinder 10 is set to a relatively high value, for example, 1000 kg / cm2 can be set, and as a result, the operation time of the hydraulic generator 2 can be set short, and each clamp can be unclamped in a short time. Further, since the configuration is simpler than that of a conventional mechanism for converting rotation into pressure, cost can be reduced without difficulty. The work is taken out in the unclamped state. Then, after setting the next work as required, in order to return each clamp to the clamped state, hydraulic pressure is supplied to the lower oil chamber 10e of the operation cylinder 10, and the operation cylinder 10 is returned to the initial state. And each member may be returned to the state shown in FIG.

[0021]

As described above, according to the present invention, an operating cylinder for pressing a cylinder of a hydraulic generator is provided on a clamper driving device body movably arranged in a direction approaching a pallet jig. The axis is parallel to the axis of the cylinder of the hydraulic generator and movably provided in the axial direction, and is engaged with the engagement flange provided on the hydraulic generator on the cylinder body of the operating cylinder. Since the engaging portion is provided integrally, no load is applied to the pallet jig when the hydraulic pressure generator is strongly pressed by the operating cylinder, so that the operation time of the hydraulic pressure generator can be shortened. It is possible to simultaneously satisfy that an unnecessary moment is not applied to the jig. In addition, since the structure is simpler than that of a conventional mechanism for converting rotation into pressure, cost can be reduced, reliability is improved, and setting to a hydraulic generator becomes easy.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a clamper driving device in a pallet jig showing one embodiment of the present invention.

FIG. 2 is a plan view of a clamper driving device in the pallet jig.

FIG. 3 is an explanatory diagram of an operation of a clamper driving device in the pallet jig.

FIG. 4 is an explanatory diagram of an operation of a clamper driving device in the pallet jig.

FIG. 5 is an operation explanatory view of a clamper driving device in the pallet jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pallet jig 2 Hydraulic generator 3 Cylinder 4 Ring groove 4a Engagement flange 5 Clamper driving device 6 Support frame 7 Guide 8 Clamper driving device main body 9 Moving cylinder 10 Operation cylinder 10a Cylinder main body 10b Oil chamber 10c Piston 10d Piston rod 10e Oil chamber 12 Spring 14 Engagement part 16 Pin for positioning

Claims (1)

(57) [Claims] 1. A moving device that moves close to a pallet jig provided with a clamper for fixing a workpiece at a predetermined position and a hydraulic generator built in a cylinder, and presses a cylinder of the hydraulic generator to generate the hydraulic generator. A hydraulic drive, a clamper driving device in a pallet jig for releasing the clamped state of the clamper by supplying the clamper with a clamper, wherein a clamper driving device body movably arranged in a direction approaching the pallet jig, An operating cylinder for pressing the cylinder of the hydraulic generator is provided so that its axis is parallel to the axis of the cylinder of the hydraulic generator and movably in the axial direction, and a cylinder body of the operating cylinder is provided. A clutch for a pallet jig, wherein an engaging portion for engaging with an engaging flange provided on the hydraulic pressure generator is integrally provided. Drive.