JPH0576631U - Work transfer device in transfer press machine - Google Patents

Abstract

(57) [Summary] [Constitution] A transfer press machine is a work transfer device for performing a clamping operation and a lifting operation of a feed bar 7 for transferring a work, via a left and right moving body 2 and an elevating body 5. Then, the moving body is moved through the clamp rack shaft bodies 12A, 12B and the pinion 13 that meshes with both clamp rack shaft bodies, and the lift rack is moved up and down. It is designed to be performed via the shaft and the pinion. [Effect] Since the rack and pinion mechanism is used, unlike the conventional one that uses a timing belt,
Since the belt does not stretch, the clamping and lifting operations can be performed accurately, and the left and right moving bodies are driven via one pinion, so compared to the case where a drive device is provided for each. It is economical.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work transfer device in a transfer press machine.

[0002]

[Prior Art]

 Usually, a transfer press machine is provided with a work transfer device for sequentially transferring a work to each press step.

Conventionally, as a work transfer device of this type, there is one disclosed in Japanese Utility Model Laid-Open No. 59-81541. That is, the work transfer device is provided with a lift frame that is lifted and lowered by a lift device, a carrier that is arranged above the lift frame and that is movable in a work clamping direction by a clamp device, and a vertical direction with respect to the carrier. The guide rod is inserted through the guide rod and has a guide roller attached to the lower end of the guide frame and a carrier provided at the upper end of the guide rod. It is composed of a feed bar that is reciprocally moved by.

In the above-described lift device and clamp device, motors are used to drive the pinions for lifting and clamping, respectively, via the timing belt.

[0005]

[Problems to be solved by the device]

 By the way, since the timing belt is used in the drive system of the lift device and the clamp device, there is a problem that the belt is stretched and the lift and clamp operations are not accurately performed.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a work transfer device in a transfer press machine of the present invention is configured such that, in a transfer press machine, feed bars for transferring a work are moved toward and away from each other in a direction orthogonal to a transfer direction to perform a clamping operation. In addition to the lifting device, a pair of left and right moving bodies are movably installed in a direction perpendicular to the work transfer direction on a support stand located below the work transfer path. A clamp device for moving the moving bodies toward and away from each other is provided, and each of the moving bodies is provided with an elevating body which can be moved up and down, and a lift device for raising and lowering each of the moving bodies. A pair of rack shafts that are connected to each other and are arranged so that the rack teeth face each other. A pair of front and rear racks, each of which includes a pinion that meshes with rack teeth of a shaft and a first rotation drive device that rotates the pinion, and further that the lift device hangs down from the lower surface of the elevating body. The shaft body, the spline shaft body provided in the left-right direction on the support frame side, the first pinion slidably fitted on the spline shaft body and meshed with the one rack shaft body, and the movement. A second pinion rotatably supported on the body side and meshing with the first pinion and the other rack shaft body, and a second rotary drive device for rotating the spline shaft body.

[0007]

[Action]

 According to the above configuration, since the rack and pinion mechanism is used when moving the moving body and moving the lifting body up and down, unlike the conventional method using the timing belt, the belt is stretched. Therefore, the clamp operation and the lift operation can be accurately performed.

Further, since the left and right moving bodies are driven via one pinion, it is very economical as compared with the case where a drive device is provided for each.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. First, an overall schematic configuration of a work transfer device in a transfer press machine will be described with reference to FIGS.

That is, this work transfer device is interlockingly connected to a support pedestal 1 arranged at a plurality of front and rear positions below a work transfer route, and a clamp device 2 and is connected to each of the support pedestals 1 at the work transfer route. A movable body 3 movably provided via a guide member (see FIG. 6, for example, a guide roller may be used) 8 in the left-right direction orthogonal to the above, and is interlockingly connected to the lift device 4 and the above-mentioned each. The ascending / descending body 5 provided to be movable up and down on the moving body 3 and the feeding device 6 are interlockingly connected, and are movably guided and supported by the respective elevating and lowering bodies 4 on the left and right sides in the work conveying direction via the guide rollers 9. It is composed of a pair of left and right feed bars 7.

The pair of left and right feed bars 7 are reciprocally moved in the front-rear direction along the conveying direction by the feeding device 6, and the moving body 3 is moved leftward and rightward by the clamp device 2 (arrow a in FIG. 3). (Shown by arrow) to perform a clamp operation, and the lift device 4 moves up and down (shown by an arrow b in FIG. 3) to perform a lift operation.

Next, the clamp device 2 and the lift device 4, which are the drive devices of the feed bar according to the present invention, will be described in detail. First, as shown in FIGS. 3 to 5, the clamp device 2 is guided to the upper and lower portions of the holding frame body 11 provided in the central portion of the support frame 1 and movably in the left-right direction. A pair of clamp rack shafts 12A and 12B each having an outer end connected to the left and right moving bodies 3, and a pair of clamp rack shafts 12A and 12B rotatably provided on the holding frame 11. The pinion 13 meshed with each rack tooth 12a and the first rotation drive device 14 arranged in the support frame 1 to rotate the pinion 13.

In addition, the first rotary drive device 14 includes a driven bevel gear 15 attached to one end of the support shaft portion 13 a of the pinion 13 and a drive gear engaged with the driven bevel gear 15 of the output shaft portion 17 a. It is composed of a speed reducer 17 to which the side bevel gear 16 is attached, and a clamp servomotor 18 for rotating the speed reducer 17.

Therefore, when the pinion 13 is rotated by the clamping servomotor 18, the pair of clamping rack shaft bodies 12A and 12B are moved in the left-right direction, so that the moving bodies 3 on both sides approach each other. Clamping operation is performed by separating.

In this clamp operation, a synchronization deviation prevention device 21 is provided at each of the left and right positions so that the synchronization deviation of the movement of each moving body 3 does not occur. The anti-synchronization prevention device 21 is arranged over each of the support pedestals 1 in the work transfer direction, and has a connecting shaft body 22 having rack teeth 22a formed in the middle thereof, and is rotated in each support pedestal 1 in the vertical direction. A gear 24 that is freely supported and that meshes with the rack tooth 22a at the lower end and meshes with the rack tooth 12b formed at the other end of the one clamping rack shaft body 12B at the upper end. And a synchronizing shaft body (shown in FIG. 1) 26 that couples the coupling shaft bodies 22 at the front and rear positions.

As shown in FIGS. 3, 4, 6 and 7, the lift device 4 is provided so as to hang down on the lower surface of the elevating body 5 which is guided by the moving body 3 so as to be able to ascend and descend. A pair of front and rear lift rack shafts 31A and 31B, a spline shaft 32 provided on the support base 1 side in the left-right direction and rotatably, and a slidable external fitting to the spline shaft 32. A drive side pinion (first pinion) 33 meshed with the rack teeth 31a of the one lift rack shaft body 31A, and the drive side pinion 33 and the other lift rotatably supported on the moving body 3 side. The rack shaft body 31B includes a driven pinion (second pinion) 34 that meshes with the rack teeth 31a, and a second rotary drive device 35 that rotates the spline shaft body 32.

The second rotary drive device 35 includes a driven gear 41 attached to an end of the spline shaft body 32, a fan-shaped intermediate gear 42 meshing with the driven gear 41, and the intermediate gear. A drive side gear 43 meshing with 42 is composed of a lift servomotor 45 for rotating it via a reduction gear 44.

A mechanism is provided for constantly urging the elevating body 5 upward so as to cancel the weight on the feed bar 7 side. That is, as shown in FIG. 7, a biasing rack shaft 51 is meshed with the intermediate gear 42, and a cylinder device (for example, an air cylinder) 52 is connected to the biasing rack shaft 51. .

Therefore, when the lift servomotor 45 is driven, the pinions 33, 34 are rotated via the gears 43, 42, 41 and the spline shaft body 32, so that the lift rack shaft body 31A, 31B, that is, the lifting body 5 is moved up and down.

As described above, since the rack and pinion mechanism is used as the drive system of the clamp device 2 and the lift device 4, unlike the conventional one using the timing belt, the belt is stretched. Therefore, the clamp operation and the lift operation can be performed accurately.

Further, since the pair of left and right moving bodies 3 are moved via one pinion 13, only one servomotor may rotate this pinion 13, and therefore, for example, This is very economical compared to the case where a driving servo motor is provided for each moving body.

By the way, in the above embodiment, the servo motor is used as the drive source, but a cylinder device or the like may be used.

[0023]

As described above, according to the configuration of the present invention, since the rack and pinion mechanism is used to move the moving body and move the lifting body up and down, the conventional timing belt is used. Unlike the above, the belt does not stretch, so that the clamp operation and the lift operation can be performed accurately.

Further, since the left and right moving bodies are driven via one pinion, it is very economical as compared with the case where a drive device is provided for each.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic overall configuration of a work transfer device according to an embodiment of the present invention.

FIG. 2 is a side view showing a schematic overall configuration of a work transfer device in the embodiment.

FIG. 3 is a cross-sectional view showing essential parts of a lift device and a clamp device of the work transfer device in the embodiment.

FIG. 4 is a plan view showing a drive unit of a lift device and a clamp device of the work transfer device in the embodiment.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a sectional view taken along line BB of FIG.

7 is a cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support stand 2 Clamping device 3 Moving body 4 Lifting device 5 Lifting body 7 Feed bar 12A, 12B Clamp rack shaft body 13 Pinion 14 1st rotation drive device 31A, 31B Lift rack shaft body 32 Spline shaft body 33 Drive side pinion 34 Driven side pinion 35 Second rotation drive device

Claims (1)

[Scope of utility model registration request] 1. A transfer press, which is a transfer device for causing a feed bar for transferring a work to approach and separate from each other in a direction orthogonal to the transfer direction to perform a clamp operation and a lift operation. A pair of left and right moving bodies are movably provided in a support frame arranged below the path in a direction orthogonal to the workpiece conveying direction, and a clamping device for moving these moving bodies toward and away from each other is provided. A pair of lift units are provided so that they can be raised and lowered, and a lift device that raises and lowers each of these lift units is provided, and the above-mentioned clamp device is connected to each moving unit and arranged so that rack teeth face each other. A rack shaft body, a pinion that meshes with rack teeth of both rack shaft bodies, and a first rotary drive that rotates the pinion. And a pair of front and rear rack shafts provided on the lower surface of the lifting body, the spline shafts provided in the left-right direction on the support frame side, and the spline shafts. A first pinion slidably fitted on the body and meshed with the one rack shaft body; and a first pinion rotatably supported on the movable body side and meshed with the first pinion and the other rack shaft body. A work transfer device in a transfer press, comprising two pinions and a second rotation drive device for rotating the spline shaft body.