JPH0670929U - Clamp device Push / pull drive device - Google Patents

Abstract

(57) [Summary] [Purpose] When there is a beam-like reinforcing member between slides, it does not interfere with the reinforcing member even if the slide interval is not particularly increased. [Structure] A clamp device 21 movable along a T-slot 2 of a slide 1, a flexible strip 22 driven by a strip drive wheel 39 to drive the clamp device forward and backward, and smaller than a strip drive wheel. The first transmission wheel 40 having a diameter is provided on the shaft 44 common to the linear drive wheel, and the second transmission wheel 41 is provided corresponding to the first transmission wheel.
In a device provided with a loop transmission body (42) stretched over the second transmission wheel and a drive portion (23) provided so that a linear movement portion of the loop transmission body is reciprocally driven by a fluid pressure cylinder (43), an outer side of a lower end portion of a slide A drive portion is provided so that the strip drive wheel is located above the edge portion 46 projecting inward and the second transmission wheel is located above it.
A guide portion 24 for guiding the flexible strip extending from the end of the T-slot toward the extension direction of the T-slot, and then folding back to the upper side to pass through the lower side of the strip drive wheel so as to be wound around this. Provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is designed to move along a T-slot a hydraulic clamping device used to fix a press die to a slide or bolster of a press machine, or to fix other articles on a given table. Clamp device push-pull drive device.

[0002]

[Prior art]

 A conventional clamp device push-pull drive device of this type is described in Japanese Utility Model Publication No. 4-21612. As shown in FIG. 4, the device disclosed in the publication has a clamp device 3 which is movable along a T-slot 2 of a slide 1 of a press machine, and one end of which is inserted into the T-slot 2 from the end of the T-slot. Is engaged with the clamp device 3 and the other end of which is located outside the T-slot, and the portion of the flexible strip 4 that extends from the end of the T-slot 2 is engaged and rotated. Clamp device push-pull drive device, comprising: a strip drive wheel 5 provided to push and pull the flexible strip 4 to move the clamp device 3 along the T groove 2. A first transmission wheel 6 having a diameter smaller than the diameter of 5 is provided on the shaft 7 common to the strip drive wheel 5 so as to transmit the rotation to the strip drive wheel 5, and the first transmission wheel 6 is provided corresponding to the first transmission wheel 6. The second transmission wheel 8 is separately provided, and the loop strip 9 is stretched on the first and second transmission wheels 6 and 8. By combining the fluid pressure cylinder 10 to the line movement unit is arranged to reciprocate along the loop strip member 9 in the loop. In the figure, 14 is a compressed air source and 15 is a hydraulic pressure source. This is a clamp device push-pull drive device 11 configured to push and pull by a fluid pressure cylinder so as to be as bulky as possible.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional clamp device push / pull drive device 11 is excellent in that it can be provided at a relatively low cost by using the pneumatic cylinder as the driving cylinder 10. However, since the overall structure of the device is vertically long, as shown in FIG. 5, the slides 1a and 1b for mounting the upper molds are arranged in close proximity to each other so that several steps are successively performed. In this press machine, the beam-like reinforcing member 12 of the press machine may be located between the slides 1a and 1b. In such a case, the clamp device push-pull drive device is attached to the slides 1a and 1b of the press machine. When installing 11, the clamp device pushing / pulling drive device 11 becomes a hindrance and the slide interval L becomes large, or there is a problem that the existing press machine with a smaller slide interval L cannot be installed. When the slide interval L becomes large, the work feed pitch becomes large and the feed time becomes long, so that the product processing time is lengthened or the work feed speed is increased. Generally, increasing the product processing time is difficult to use because it lowers the efficiency, and increasing the feed speed of the work causes the feeding device to be overloaded, which is also difficult to use. SUMMARY OF THE INVENTION It is an object of the present invention to prevent a cylinder-driven type clamp device push-pull drive device from interfering with a reinforcing member even if the slide interval of the press machine having the beam-shaped reinforcing member is not particularly increased.

[0004]

[Means for Solving the Problems]

 The means of the present invention comprises a clamp device movable along a T-groove of a slide, a flexible strip having one end coupled to the clamp device and being driven forward and backward via a strip drive wheel. A first transmission wheel having a diameter smaller than the diameter of the linear drive wheel is provided on a shaft common to the linear drive wheel so as to transmit rotation to the linear drive wheel, and a second transmission wheel corresponding to the first transmission wheel is provided. Separate transmission wheels are provided, loop strips are stretched on the first and second transmission wheels, and a fluid pressure cylinder is connected to the linear movement part of the loop strips to reciprocate the loop strips along the loops. In the push-pull drive device of the clamp device, which is provided with a drive unit for the striation drive wheel, the striation drive wheel is positioned above the edge of the lower end of the slide projecting outward. The drive section is provided so that the second transmission wheel is located above the T-groove. A guide portion is provided for guiding the flexible strip extending from the strip in the T-groove extension direction, and then folding the strip upward to pass through the lower side of the strip drive wheel so as to be wound around the flexible strip. It is characterized by that.

[0005]

[Action]

 This means has a structure in which the strip drive wheel is arranged on the upper side of the edge protruding outward of the lower end of the slide, and the flexible strip is wound around the strip drive wheel from below. It is possible to shift the positions of the slides to the slide side, and avoid interference with the beam-like reinforcing member between adjacent slides provided in the press machine.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. The clamp device pushing / pulling drive device 20 includes a clamp device 21, a flexible strip 22, a drive portion 23, and a guide portion 24. The clamp device 21 is a conventionally well-known device that operates by hydraulic pressure, and the engaging portion 30 is engaged with the T groove 2 on the lower surface of the slide 1 of the press machine, and is movable along the T groove 2. is there. Further, as shown in the figure, the clamp device 21 has a hydraulic hose 31 having a distal end coupled thereto, and a signal cable 32 also connected thereto. The signal cable 32 is provided as needed and is connected to a switch 34 that detects when the clamp device reaches the position of the press die 33.

In this embodiment, the flexible strip 22 is provided with rollers 36 on both sides of the chain 35 as shown in the drawing, and further has a holding portion hole for holding the hydraulic hose 31 and the cable 32. It is provided on the coupling shaft portion 37. In this flexible strip 22, the roller 36 is guided by the wide portion of the inner portion of the T groove 2 and can transmit the pushing force and the pulling force in the longitudinal direction. The distal end of the flexible strip 22 is coupled to the engaging portion 30, and the proximal side passes through the engaging portion 30 through the T groove 2 in a state where the engaging portion 30 is inside the T groove 2 and will be described later. Passing through the guide portion 24, extending further upward, further bending and terminating downward, and the base end thereof is fixed to a proper position of the main body 38 fixed to the slide 1. The base end of the hydraulic hose 31 is fixed to the main body portion near the base end of the flexible strip 22.

The drive unit 23 includes a strip drive wheel 39 engaged with the flexible strip 22, a first transmission wheel 40, a second transmission wheel 41, a loop strip 42, a pneumatic cylinder 43, etc., and a main body 38. It is provided in. The strip driving wheel 39 is a sprocket, and engages with the rollers 36 on both sides of the flexible strip 22 and rotates in the forward and reverse directions to push and pull the flexible strip 22. The striation drive wheel 39 is fixed to the shaft 44, and is arranged at a position slightly above the protruding edge portion 46 at the lower end of the slide 1 so that the shaft 44 is attached to the main body 38 as shown in FIG. A first transmission wheel 40 having a diameter smaller than the diameter of the linear drive wheel 39 (both are diameters of pitch circles) is supported on a shaft 45 supported by a bearing 45 (see FIG. 2). A second transmission wheel 41 is arranged above the first transmission wheel 40 with a space therebetween, and is rotatably supported by the main body 38. A loop strip 42 is stretched around the first transmission wheel 40 and the second transmission wheel 41. The loop strip 42 is a normal roller chain, and the first and second transmission wheels 40 and 41 are sprockets corresponding thereto. An air pressure cylinder 43 is arranged in parallel with the linear portion of the loop strip 42, and its cylinder portion 43a is fixed to the main body 38. It is connected to the straight part. As the piston rod 43b moves back and forth, the loop strip 42 is driven back and forth along the loop, which increases the speed of the strip drive wheel 39 by the large diameter of the first transmission wheel 40. 22 moves forward and backward over a distance longer than the loop striation 42.

The guide portion 24 is an advancing / retreating path of the flexible strip 22 provided in the main body 38, and the path is a little outward in continuation with the end portion of the T groove 2 as seen in FIG. To the slide 1 side, and then extends horizontally, and goes around the lower side of the striation drive wheel 39 to the upper side and ends there. As shown in FIG. 2, the guide portion 24 is formed by a curved groove that is open in the intermediate space portion of the main body 38 so as to face each other. The rollers 36 on both sides of the flexible strip 22 are inserted and guided in the groove. In the middle of the flexible strip 22, the guide portion 24 is always engaged with the strip drive wheel 39 in the portion where the guide portion 24 passes under the strip drive wheel 39.

The clamp device push / pull drive device 20 configured as described above can push and pull the clamp device 21 by expanding and contracting the pneumatic cylinder 43 in the same manner as the conventional device. By supplying or discharging the pressure oil through the hydraulic hose 31 at the predetermined moving position, the mold 33 can be fixed by performing the clamping operation. As shown in FIG. 1, the clamp device pushing / pulling drive device 20 is mounted on the slide 1, and the portion where the guide portion 24 is located projects outward from the slide 1. The drive unit 23 above it is biased toward the slide side and hardly protrudes. Therefore, as shown in FIGS. 3 (a) and 3 (b), the clamp device push / pull drive device 20 has adjacent slides 1a and 1b even if the slide gap L1 is smaller than the slide gap L of FIG. Can be provided so as not to interfere with the reinforcing member 12 of the press machine. Note that the slides 1a and 1b in FIG. 3B are in the state of being in the ascending end position.

[0011]

[Effect of device]

 According to the present invention, the drive portion of the strip drive wheel provided to connect the fluid pressure cylinder to reciprocally drive the loop strip is provided to the slide side so that the beam is provided between the adjacent slides of the press machine. When a cylindrical reinforcing member is provided, it is possible to provide a push / pull driving device of a type in which push / pull driving is performed by a cylinder having a characteristic that it can be manufactured inexpensively without interfering with the beam-shaped reinforcing member. Therefore, it is possible to install the clamp device push / pull drive device without increasing the space between steps of the press machine, and there is no problem that the product processing time is lengthened or the work feed speed is forcibly increased.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of the same embodiment.

3A and 3B show a state in which the device of the embodiment is installed on adjacent slides, FIG. 3A is a schematic plan view, and FIG. 3B is a schematic partial vertical sectional front view.

FIG. 4 is a partial vertical sectional front view showing an example of a conventional clamp device push-pull drive device.

FIG. 5 is a partial vertical sectional front view showing an example of a usage state of the conventional example of FIG.

[Explanation of symbols]

 1 slide 2 T groove 20 clamp device push-pull drive device 21 clamp device 22 flexible strip 23 drive part 24 guide part 39 strip drive wheel 40 first transmission wheel 41 second transmission wheel 42 loop strip 43 fluid pressure cylinder 44 axis

Continuation of the front page (72) Minoru Takeuchi Minoru 5 Yokaichi-cho, Komatsu-shi, Ishikawa Prefecture Komatsu Ltd.

Claims (1)

[Scope of utility model registration request] 1. A clamp device movable along a T-groove of a slide, and a flexible strip body having one end coupled to the clamp device and being driven forward and backward through a strip drive wheel.
A first transmission wheel having a diameter smaller than the diameter of the strip drive wheel is provided on a shaft common to the strip drive wheel so as to transmit rotation to the strip drive wheel, and a second transmission wheel corresponding to the first transmission wheel is provided. A transmission wheel is separately provided, a loop strip is stretched on the first and second transmission wheels, and a fluid pressure cylinder is coupled to a linear moving portion of the loop strip to reciprocate the loop strip along the loop. In the push-pull drive device of the clamp device including the drive unit for the strip drive wheel, the strip drive wheel is positioned above the edge of the lower end of the slide projecting outward, and above it. The drive unit is provided so that the second transmission wheel is located in
A guide that guides the flexible strip extending from the end of the T-slot toward the T-slot extension direction, and then folded back to the upper side so as to pass through the lower side of the strip drive wheel and be wrapped around the flexible strip. Clamp device push-pull drive device characterized in that a portion is provided.