JPH055240U - Transfer Aida - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a transfer feeder with low noise and high feed accuracy by using a ball screw as a drive system. [Constitution] In a transfer feeder for carrying in and out a work and carrying it between respective processing stations by operating a pair of transfer bars 18 arranged in parallel in a work carrying direction A in two-dimensional or three-dimensional directions, A ball screw 6 driven by a servomotor 11 is provided in at least one drive system of a feed drive system, a lift drive system, and a clamp drive system to be driven, and the transfer bar 18 is driven by the ball screw 6. , Gear noise is not generated during the operation of the transfer bar 18, so that noise can be reduced and
Since feed accuracy is improved, feed mistakes do not occur.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 This invention relates to a transfer feeder using a ball screw as a drive system.

[0002]

[Prior Art]

 Conventionally, transfer presses use transfer feeders for loading and unloading workpieces and transferring work between processing stations. The transfer feeder has a pair of transfer bars arranged in parallel in the work transfer direction, and the work is transferred by operating these transfer bars two-dimensionally or three-dimensionally. Racks and pinions are generally used in the drive system for driving the transfer bar.

[0003]

[Problems to be solved by the device]

 However, since the drive section of the rack and pinion strokes approximately twice the length of the rack, the drive system becomes large and noise is generated during operation. In addition, since the structure of the support part that supports the rack and pinion is complicated and heavy, a large capacity motor is required for the drive source, and the feed pitch error accumulates, resulting in low feed accuracy. There was also a defect. It is an object of the present invention to provide a transfer feeder which eliminates the above-mentioned conventional problems by using a ball screw with a high lead in a drive system.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention operates a pair of transversal bars arranged in parallel in the work transfer direction in two-dimensional or three-dimensional directions to carry in and out a work and carry it between processing stations. In the transfer feeder, at least one of the feed drive system, lift drive system and clamp drive system that drives the transfer bar is provided with a ball screw driven by a servomotor, and the ball screw drives the transfer feeder. It was something that I did.

[0005]

[Work]

 With the above configuration, the moving stroke of the transfer bar drive unit is reduced, so that the drive system can be made smaller and lighter, and noise can be reduced because no gear noise is generated.

[0006]

【Example】

 An embodiment in which the present invention is applied to a feed drive mechanism of a transfer feeder will be described in detail with reference to the drawings. In the figure, reference numeral 1 is a feed mechanism, and a pair of guide rails 4 are laid along a work transfer direction A in a feed box 3 installed on the upper part of the press body 2, and a feed carrier 5 is mounted on these guide rails 4. It is suspended so that it can move in the transport direction A. A ball screw 6 having a high lead is arranged between the guide rails 4 along the inside of each guide rail 4. Both ends of these ball screws 6 are supported by support members 7, and ball nuts 8 screwed onto the ball screws 6 are fixed to the upper surface of the feed carrier 5 by brackets 9.

Further, one end side of each ball screw 6 is connected to two servo motors 11 via a speed reducer 10, respectively. As shown in FIGS. 4 and 5, the servo motor 11 is attached to the side surface of the gear case 10a of the speed reducer 10. The pinion 11b attached to the rotary shaft 11a of the servo motor 11 is the first stage gear 10b of the speed reducer 10. Is meshed with. The speed reducer 10 is composed of five gears 10b, 10c, and 10d that mesh with each other. The first gear 10b is located in the center and the last gear 10d is located on both sides. A pinion 10f attached to the output shaft 10e is meshed with the gear 10d, and one end of each of the ball screws 6 is connected to the output shaft 10e through a joint 13.

On the other hand, a guide rail 15 is laid under the feed carrier 5 in a direction orthogonal to the work transfer direction A, and a pair of clamp carriers 16 are movable along the guide rail 15 along the guide rail 15. Is supported by. Each of the clamp carriers 16 is designed to be brought into contact with and separated from the clamp carrier 16 in the unclamping direction B by a clamp drive system (not shown), and an upper end of a guide post 17 is fixed to each clamp carrier 16. Both ends of the transfer bar 18 are vertically slidably supported by these guide posts 17 via spherical bearings 19, and stoppers 20 for preventing the transfer bar 18 from dropping off are provided at the lower ends of the guide posts 17. Is stuck.

The operation will be described next. Normally, in the three-dimensional transfer feeder, the transfer bar 18 is moved in the three-dimensional directions of the feed, the lift and the clamp to convey the work (not shown). .. That is, the work carried in to the work carrying-in side of the transfer press is moved by the clamp drive system (not shown) in the clamping direction, so that the fingers (not shown) attached to the respective transfer bars 18 are used. Crumpled. After that, the transfer bar 18 is lifted by a lift drive system (not shown), and then the servo motor 11 of the feed mechanism 1 rotates the ball screw 6 via the speed reducer 10.

As a result, the feed carrier 5 having the ball nut 8 screwed onto the ball screw 6 is moved in the work transfer direction (feed direction) A along the guide rail 4, so that the transfer bar 18 is also fed. Move with 5. Then, when the feed carrier 5 moves by a preset pitch (which can be arbitrarily set by the servo motor 11) and stops, the lift drive system again lowers the transfer bar 18, and the clamp drive system further transfers each transfer. The bar 18 is moved in the unclamping direction and the work is released from the fingers.

After the work is released, each transfer bar 18 returns to its original position by the operation reverse to the above path, and then the above operation is repeated to carry the work in and out of the transfer press and transfer between the processing stations. The above operation is performed in synchronization with the operation of the transfer press. Although the above embodiment is applied to the feed drive system, it can be applied to the lift drive system and the clamp drive system with the same configuration.

[0012]

[Effect of the device]

 As described in detail above, this invention uses a high-lead ball screw to move the transformer in two-dimensional or three-dimensional directions. Since the movement stroke of the drive unit is reduced, the drive system can be made smaller and lighter. In addition, since no gear noise is generated during operation, noise can be reduced, and by using a servo motor as the drive source, it is possible to feed at any pitch. Moreover, since the feed accuracy and the rack and pinion are improved by about 10 times, the occurrence of feed mistakes can be prevented, and the conventional oil lubrication can be switched to the crease lubrication, which facilitates maintenance.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a feed mechanism according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the feed mechanism.

FIG. 3 is a plan view of the feed mechanism.

FIG. 4 is a partially cutaway side view of the speed reducer.

FIG. 5 is a front view of the speed reducer.

FIG. 6 is an enlarged cross-sectional view near a ball screw.

[Explanation of symbols]

6 ball screw, 11 servo motor, 18 transfer bar, A work transfer direction.

Claims (1)

[Claims for utility model registration] 1. A pair of transfer bars 18 arranged in parallel in the work transfer direction A are operated in two-dimensional or three-dimensional directions to transfer a work in and out, and transfer between work stations. In the transfer feeder to be performed, a ball screw 6 driven by a servo motor 11 is provided in at least one drive system of a feed drive system, a lift drive system, and a clamp drive system for driving the transfer bar 18, and the transfer screw is used by the ball screw 6. Bar 18
A transfer feeder designed to drive.