JPH0775740B2 - Synchronous deviation detection device in work transfer device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates are those which relate to synchronization shift detecting device in the workpiece transfer device of the transfer press.

[0002]

2. Description of the Related Art Generally, a transfer press machine is provided with a work transfer device for sequentially transferring a work to each pressing step.

Conventionally, as a work transfer device of this type,
There is one disclosed in JP-A-59-81541. That is, this 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 is movable in a work clamping direction by a clamp device, and a vertical direction with respect to the carrier. Is guided by a guide roller having a guide roller attached to the lower end thereof and guided by a lift frame, and a carrier provided at the upper end of the guide rod in the conveying direction and by a feeding device. It consists of a reciprocating feed bar.

By the way, the above-mentioned lift device, clamp device, etc. are arranged at both sides of the transfer path of the work and at a plurality of positions along the transfer path, and the operations at the left and right positions must all be the same. If they are out of synchronization, the work cannot be conveyed accurately, which adversely affects the quality of the product.

For this reason, conventionally, a control circuit of a lift device, a clamp device, or the like, detects a deviation in synchronization by software, that is, electrically, and stops the motor when the deviation occurs. .

[0006]

However, according to the above-described conventional configuration, there is a problem that the synchronization deviation cannot be detected when some abnormality occurs in the control circuit, and even if the synchronization deviation is detected, Due to the influence of the load on the motor, there is a problem in that the stop operation is delayed and the drive unit of the device is damaged.

[0007]

In order to solve the above problems, the synchronization deviation detecting device in the work transfer device of the present invention is arranged at a plurality of positions when the work transfer feed bar is operated in a predetermined direction. A detection device for detecting a synchronization deviation of a transmission shaft body between drive devices, a first transmission shaft body operated by one drive device and a second operation shaft body operated by the other drive device. Of the first and second transmission shafts are attached to the detection member, and the detection member is moved to the other transmission shaft side. Is provided with a detector for detecting the
Protruding an engaging member on the end of one of the transmission shafts
And the other end facing the end of one of the transmission shafts
Attach the above-mentioned engaging member to the end of the transmission shaft in the axial direction.
Also, a guide member that guides movably by a predetermined distance is provided.
It is a thing.

[0008]

According to the above construction, the displacement of the movement of the transmission shaft bodies of the drive devices arranged at a plurality of positions is detected by the detector through the detection member. Therefore, the drive device is detected based on this detection. By stopping, it is possible to prevent damage to the operating mechanism section of the transport device, and the mutual movement amount is set to the engaging member provided on one operating shaft body and the other operating shaft body side. Further, since it is mechanically regulated by the guide member that guides the engaging member, it is possible to prevent damage to the operation mechanism portion of the conveying device even if an excessive displacement occurs.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 FIG.

That is, this work transfer apparatus is provided with a support base 1 arranged at a plurality of front and rear positions below a work transfer path.
A movable body 3 which is interlocked with the clamp device 2 and is movably provided on each of the support bases 1 via a guide member (shown in FIG. 4) 8 in the left-right direction orthogonal to the work transfer path. Lifting bodies 5 that are linked to the lift device 4 and that are vertically movable on each of the moving bodies 3;
5 is a guide roller (shown in FIG. 4) 9 in the work conveying direction
It is composed of a pair of left and right feed bars 7 that are movably guided and supported via.

Next, the lift device 4 and the clamp device 2 related to the present invention will be described with reference to FIG. The lift device 4 is provided in the left-right direction on the side of the support base 1 and a pair of front and rear lift rack shafts 11A and 11B that are provided on the lower surface of the lift 5 that is guided by the moving body 3 so as to be lifted. A spline shaft body 12, and a drive side pinion 13 slidably fitted on the spline shaft body 12 and meshed with a tooth portion of the one lift rack shaft body 11A.
The driven side pinion 14 rotatably supported on the moving body 3 side and meshed with the driving side pinion 13 and the other lifting rack shaft body 11B, and the spline shaft body 12
Is driven by a driven bevel gear 15 attached to the end thereof.

Further, the rotary drive device 16 is provided with a transmission shaft body 18 which is vertically arranged on the support base 1 and has a drive side bevel gear 17 meshed with the driven bevel gear 15 at the upper end thereof. , A transmission rack shaft body 20 having first rack teeth 20a that mesh with a gear 19 provided at the lower end of the transmission shaft body 18, and the transmission rack shaft body 2
Lifting servomotor 2 for moving back and forth via a pinion group 21 that meshes with a second rack tooth 20a formed in 0
2 and.

Therefore, the lift servomotor 2
When 2 is operated, the transmission rack shaft body 20 and the transmission shaft body 1
8, both pinions 13, 14 through the spline shaft body 12
Because the rack is rotated, the lift rack shafts 11A, 11B
That is, the lifting / lowering body 5 is lifted / lowered as indicated by an arrow A.

Further, the clamp device 2 includes a connecting member 31 provided on the moving body 3, a clamp rack shaft body 32 attached to the connecting member 31 in the left-right direction, and a horizontal shaft center around the support base 1. It is rotatably supported by
A transmission shaft body having a pinion 33 meshed with a rack tooth 32a formed at one end side of the clamp rack shaft body 32 at one end and a driven side bevel gear 35 provided at the other end.
34 and a clamping servomotor 37 that rotates a drive-side bevel gear 36 that meshes with the driven-side bevel gear 35 .

Therefore, when the clamping servomotor 37 is driven, the moving body 3 moves in the left-right direction via the transmission shaft body 34 and the clamping rack shaft body 32 as indicated by an arrow B, and the feed bar 7 is moved. The work is clamped and unclamped while approaching and separating from each other.

By the way, since the servo motors (driving devices) 22 and 37 for driving the lift device 4 and the clamping device 2 described above are arranged at a plurality of front and rear positions in the workpiece conveying direction, the respective servo motors are arranged. Two
Reference numerals 2 and 37 are synchronized by the control circuit. However, in order to stop the servomotors 22 and 37 all at once when the synchronization does not work well, a synchronization deviation detection mechanism 51 and an excessive deviation are detected. A synchronization deviation prevention mechanism 52 for preventing such synchronization deviation is provided respectively.

The above-mentioned synchronization deviation detection and synchronization deviation prevention provided on the lift device 4 side and the clamp device 2 side are performed.
Since the mechanisms 51 and 52 have the same structure, the lift device 4 side will be mainly described in this embodiment.

That is, as shown in FIG. 1 and FIG.
The transmission rack shaft bodies 20 in the front-rear position are interlockingly coupled to each other by a synchronization shaft body 61, and the synchronization shaft body (first or second transmission shaft body) 61 and one transmission rack shaft body (second Alternatively, the synchronization deviation detection mechanism 51 and the synchronization deviation prevention mechanism 52 are provided over the first transmission shaft body 20.

That is, the synchronization deviation detecting mechanism 51 is attached to the transmission rack shaft body 20 side where the ends of the transmission rack shaft body 20 and the synchronization shaft body 61 are arranged to face each other. Detection plate (detection member) 62 and the shaft 61 for synchronization
The pair of front and rear proximity sensors (detectors) 63 are attached to the side of the detection plate 62 and are arranged at the front and rear positions of the detection plate 62 to detect the detection plate 62.

The synchronization deviation prevention mechanism 52 is provided at the end of the transmission rack shaft body 20 in a protruding manner, and has a rod-shaped body 66 on which a piston portion (engaging member) 65 is formed, and a synchronization shaft body. A guide space portion (guide member) 67 is formed on the 61 side and guides the piston portion 65 of the rod-shaped body 66 slidably by a predetermined distance.

In the above structure, when the synchronism between the one lift servo motor 22 for performing the lift operation and the other lift servo motor 22 is deviated, the detection plate 62 approaches one of the front and rear proximity sensors 63. , The synchronization deviation is detected. When this synchronization deviation is detected, all the driving devices involved in the conveyance operation, for example, the servo motors are stopped by the detection signal.

Further, for example, even when the lift servo motor 22 is electrically stopped, one of the lift servo motors 22 is forcibly rotated by the influence of the load, and the detection plate 62 and each proximity sensor 63 are connected. Is about to move beyond the allowable movement range (L), the piston portion 65 in the guide space portion 67 comes into contact with the front wall portion or the rear wall portion of the guide space portion 67 and moves. Is mechanically stopped. Of course, the guide space 67
The distance between the front and rear walls and the piston 65 is L. In this way, since excessive synchronization deviation is prevented, it is possible to prevent damage to each drive unit that performs the transport operation.

Next, the clamp device 2 side will be briefly described. That is, as shown in FIG. 4, the synchronization mechanism provided between the clamp devices 2 at the front and rear positions is arranged over each support frame 1 in the work transfer direction and has rack teeth 41a formed in the middle thereof. Rack shaft body 41 and a gear 42 that is rotatably supported in each support frame 1 in the vertical direction and that meshes with the rack teeth 41a at the lower end and the clamp rack shaft body 32 at the upper end. Gear 43 that meshes with rack teeth 32a formed at the end
And a synchronization shaft body 45 that connects the transmission rack shaft bodies 41 at the front and rear positions to each other. The one transmission rack shaft body 41 and the synchronization shaft body 45 are connected to each other. A synchronization deviation detection mechanism 51 and a synchronization deviation prevention mechanism 52, which are similar to those on the lift device 4 side, are provided between and.

[0024]

As described above, according to the configuration of the present invention, the detector for detecting the displacement of the movement of the transmission shaft bodies of the driving devices arranged at a plurality of positions through the detection member is provided. It is possible to detect the movement deviation caused by the influence of the load, and therefore, by stopping the drive device based on this detection, it is possible to prevent damage to the operating mechanism of the device, and it is also possible to prevent damage to the one operating shaft Since an engaging member is provided on the body and a guide member for guiding the engaging member so as to be movable by a predetermined distance is provided on the other operating shaft side, even if an excessive deviation occurs, the deviation is mechanically caused. Will be regulated, and therefore the detection signal of the synchronization deviation will cause
Even if the drive device cannot be controlled, it is possible to prevent damage to the operation mechanism portion of the transport device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a synchronization deviation detecting device of the present invention.

FIG. 2 is a plan view of an essential part showing an embodiment of the synchronization deviation detecting device of the present invention.

FIG. 3 is a schematic overall perspective view of a work transfer device according to an embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view showing essential parts of a lift device and a clamp device of a work transfer device according to an embodiment of the present invention.

[Explanation of symbols]

 2 Clamping device 4 Lifting device 7 Feed bar 11A, 11B Lifting rack shaft body 12 Spline shaft body 20 Transmission rack shaft body 22 Lifting servo motor 32 Clamping rack shaft body 34 Transmission shaft body 37 Clamping servo motor 41 Transmission Rack shaft 51 Synchronous deviation detection mechanism 52 Synchronous deviation prevention mechanism 61 Synchronous shaft body 62 Detection plate 63 Proximity sensor 65 Piston section 67 Guide space section

Claims (1)

[Claims] Claim: What is claimed is: 1. A detection device for detecting a synchronization shift between transmission shafts of drive devices arranged at a plurality of positions when a feed bar for transporting a work is operated in a predetermined direction. End portions of the first transmission shaft body operated by the above and the second operation shaft body operated by the other drive device are arranged so as to face each other, and either the first or the second transmission shaft body is arranged. A detection member is attached to one of the transmission shafts , and a detector for detecting the movement of the detection member is provided on the other transmission shaft , and the first or first transmission shaft is provided.
2 Engage with the end of one of the transmission shafts
A member is provided so that it faces the end of one of the transmission shafts.
The engaging member at the end of the other transmission shaft
A guide member that guides the user in any direction and for a predetermined distance.
Synchronization shift detecting device in the work carrier, characterized in that the provided.