JPH0576632U - Work transfer device synchronization deviation detection device - Google Patents

Abstract

(57) [Abstract] [Purpose] A synchronization deviation detection device for detecting deviations in the movement of a feed bar that conveys a work. [Structure] Each moving body 3 which is provided at a plurality of front and rear positions along a work transfer direction and supports a feed bar 7
In addition, a light projector 11 and a light receiver 12 are provided. [Effect] Since the light transmitter and the light receiver are arranged on the moving body for moving the feed bar to detect the shift of the movement of the feed bar, the servo motor for operating the moving body or the elevating body as in the conventional case. It is possible to detect the shift in the movement of the feed bar more reliably than when monitoring is performed by the encoder provided in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synchronization deviation detecting device for a work transfer device in a transfer press machine.

[0002]

[Prior Art]

 Usually, the transfer press machine is provided with a work transfer device for moving the work to the tertiary through the left and right feed bars.

This work transfer device is provided with support pedestals arranged at a plurality of front and rear positions below a work transfer path, and left and right movably provided on each of these support pedestals so as to be movable in a left-right direction orthogonal to a work transfer direction. Of the moving body, a clamp device for moving the left and right moving bodies toward and away from each other to perform a clamping operation, an elevating body that is vertically movable on each of the moving bodies and directly supports the feed bar, and each of these elevating and lowering bodies. It is composed of a lift device that raises and lowers the body to perform a lifting operation, and a feed device that moves the feed bar supported by each of the above-described lift bodies in the front-back direction along the transport direction.

By the way, the elevating body and the moving body supporting the feed bar are provided on support pedestals arranged at a plurality of front and rear positions along the conveyance direction of the work, so that bending force does not act on the feed bar. For example, it is necessary to monitor the movement of each moving body or lifting body.

Conventionally, in this monitoring, the rotation amount of a servo motor that operates a moving body or an elevating body is detected by an encoder in each support frame, and each detection value detected by each support frame is processed by a processing device. It was done by comparing with.

[0006]

[Problems to be Solved by the Invention] However, a large number of transmission mechanisms are interposed between the feed bar and the servo motor, and even if the servo motor is operating normally, the transmission mechanism in the middle of the transmission mechanism is in progress. If a failure occurs in the structure, there is a problem that the failure cannot be known.

Therefore, an object of the present invention is to provide a synchronization deviation detecting device for a work transfer device which can solve the above problems.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the first means of the present invention is to provide a feed bar for transporting a work, support pedestals arranged at a plurality of locations below the work transportation path, and left and right positions of each of these support pedestals. An apparatus for detecting a shift in the movement of the feed bar in a work transfer device having a moving body for moving the feed bar closer to and away from each other and an elevating body for moving the feed bar up and down, the moving bodies being adjacent to each other in the front and rear. One of the two is a light-transmitting device, and the other moving body is a light-receiving device.

In order to solve the above-mentioned problems, the second means of the present invention is the first means, wherein the projector and the light receiver provided on the moving body are respectively arranged on the lifting body. ..

[0010]

[Action]

 According to the above configuration, in order to detect the deviation of the movement of the feed bar, the light emitter and the light receiver are arranged on the moving body or the lifting body for moving the feed bar to detect the deviation. As described above, as compared with the case of monitoring by the encoder provided in the servo motor that operates the moving body or the elevating body, the shift in the movement of the feed bar can be detected more reliably.

[0011]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. Based on FIGS. 1 to 3, an overall schematic configuration of a work transfer device in a transfer press will be described.

That is, this work transfer device is interlocked with 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 pair of left and right moving bodies 3 movably provided through a guide member (or guide roller) 8 in a left-right direction orthogonal to the moving body 3 and a lifting device 4 and are vertically moved to the above-mentioned moving bodies 3. A pair of left and right feed bars 7 which are movably provided and are interlockingly connected to the feeding device 6 and are movably guided and supported by the respective left and right lifting bodies 5 in the work conveying direction via guide rollers 9. It consists of and.

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 in the left-right direction by the clamping device 2 (indicated by arrow a in FIG. 3). (Shown), the clamp operation is performed, and the lifting device 4 raises and lowers the elevation body 5 (shown by an arrow b in FIG. 3) to perform the lift operation.

Further, in order to detect the positional deviation at each supporting position (each supporting frame 1 position) of each feed bar 7, the synchronous deviation detecting device according to the present invention is provided. In this synchronization deviation detecting device, the projector 11 is provided on one of the moving bodies 3 adjacent to each other in the front-rear direction on either one of the left and right sides of the work conveyance path, and the other moving body is moved. The body 3 is provided with a light receiver 12.

For example, at the front and rear positions of the moving body 3B provided on the support pedestal 1B in the middle portion, the projectors 11 are arranged respectively corresponding to the movable bodies 3A and 3C provided on the support pedestals 1A and 1C at the front and rear portions. Further, the light receivers 12 are respectively arranged on the front and rear moving bodies 3A and 3C corresponding thereto.

Therefore, when all the moving bodies 3 are moving in synchronization, the light emitted from each projector 11 is incident on the light receiver 12, but any moving body 3 is out of synchronization. In this case, the light emitted from the projector 11 is not incident on the light receiver 12, and therefore the fact that the light is not incident is output to the monitoring device, and it is possible to surely know that the synchronization shift has occurred. You can

As shown in FIGS. 3 and 4, when the clamp device 2 is guided to the upper and lower portions of the holding frame body 21 provided in the central portion of the support frame 1 and movably in the left-right direction. Both of them have a pair of clamp rack shafts 22A and 22B whose outer ends are connected to the left and right moving bodies 3, respectively, and a pair of clamp rack shafts 22A that are rotatably provided on the holding frame 21. It is composed of a pinion 23 meshed with each rack tooth 22a of 22B, and a first rotary drive device 24 which is arranged in the support base 1 and rotates the pinion 23.

In addition, the first rotary drive device 24 includes a driven bevel gear 25 attached to one end of the support shaft portion 23 a of the pinion 23 and a drive gear engaged with the driven bevel gear 25 of the output shaft portion 27 a. It is composed of a speed reducer 27 to which the side bevel gear 26 is attached, and a clamp servo motor 28 for rotating the speed reducer 27.

Further, as shown in FIGS. 3 and 5, the lift device 4 is provided with a pair of front and rear lifts provided so as to hang down from 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. The rack shaft bodies 31A and 31B, the spline shaft body 32 rotatably provided on the support base 1 side in the left-right direction, and the spline shaft body 32 are slidably fitted on the outer side. The drive side pinion 33 meshed with the rack teeth 31a of the one lift rack shaft body 31A, the drive side pinion 33 rotatably supported by the moving body 3 side, and the other lift rack shaft body 31B. It is composed of a driven side 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.

The light emitter and the light receiver in the above embodiment are set to be in the ON state when there is no synchronization deviation. For example, when these devices break down or a wire break occurs in the middle of wiring. If it is turned off, it will be turned off and it is considered to work on the safety side.

By the way, in the above-mentioned embodiment, the light emitter and the light receiver for detecting the deviation of the movement of the feed bar are arranged on the side of the moving body provided on each of the supporting frames, but instead of being provided on this moving body, for example. Alternatively, it may be arranged on the side of the lifting body. In addition, when it is arranged on the lifting body side, it is necessary to distinguish whether the lifting body is out of sync or the moving body is out of sync. Depending on the press angle, it is possible to know whether the clamp operation is in progress or the lift operation is in progress. Therefore, this makes it possible to determine whether the ascending / descending body is out of synchronization or the moving body is out of synchronization.

[0023]

[Effect of the device]

 As described above, according to the configuration of the present invention, in order to detect the deviation of the movement of the feed bar, the light emitter and the light receiver are directly arranged on the moving body or the elevating body for moving the feed bar and the detection is performed. Therefore, as compared with the conventional case where the encoder provided in the servo motor for operating the moving body or the lifting body is used for monitoring, it is possible to detect the shift in the movement of the feed bar more reliably.

[Brief description of drawings]

FIG. 1 is a plan view showing a synchronization deviation detecting device of a work transfer device in a transfer press machine according to an embodiment of the present invention.

FIG. 2 is a side view showing a synchronization deviation detection device of the work transfer device in the transfer press machine of 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.

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

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

[Explanation of symbols]

 1 Support stand 3 Moving body 5 Lifting body 7 Feed bar 11 Emitter 12 Light receiver

Claims (2)

[Scope of utility model registration request] 1. A feed bar for transporting a work, support pedestals arranged at a plurality of locations below the work along a transportation path, and feed bars provided at right and left positions of each of the support pedestals so as to approach and separate from each other. A device for detecting a shift in the movement of a feed bar in a work transfer device having a moving body to be moved and an elevating / lowering body to be moved up and down, wherein a light projector is arranged on either one of the moving bodies adjacent to each other before and after the other, and the other one. A synchronism deviation detection device for a work transfer device, characterized in that a light receiver is arranged on the moving body. 2. The synchronization deviation detecting device for a work transfer device according to claim 1, wherein the light emitter and the light receiver provided on the moving body are respectively arranged on the elevating body.