JPH0726267Y2 - Work reversing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a device for rotating a workpiece 180 ° in a machining process line.

2. Description of the Related Art For example, a work such as an automobile part which is pressed in a press factory is conveyed on a line and subjected to press working one after another to be completed as a predetermined product. In such a line, the work may be turned 180 ° to turn it over and the next press working may be performed. At this time, conventionally, an operator manually turns the work over.

Problems to be Solved by the Invention However, if there is a work of manually inverting the work, it becomes an obstacle when automating the entire line. Therefore, there is a demand for a device that rotates a work by 180 ° with a simple structure, but there is a problem that it is difficult for a simple device to perform 180 ° rotation in a stable and low-impact state.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a work reversing device having a simple structure and capable of performing stable rotation with less impact.

Means for Solving the Problems The present invention has been made in order to achieve the above-mentioned object, and includes a rotating shaft for rotating 180 ° with respect to an apparatus base, and a rack-and-pinion drive for rotating the rotating shaft. Means, a work support arm fixed to the rotating shaft and protruding in the rotating radius direction, a clamper for clamping the work, a balancer provided on the rotating shaft side and protruding in the rotating radius direction, and the device base. A shock damper that is provided on the side of the rotary shaft and that is in contact with the rotary shaft side to soften the shock during the rotation.

Action According to the above-mentioned means, the balancer acts to cancel out the moment of inertia around the turning shaft caused by the weight of the work, and the stable turning can be performed. Further, at the end of the rotation, the shock damper can stop with a small impact.

Embodiment An embodiment of the present invention will be described with reference to the drawings. Device base 2
Rotation fulcrums 4 and 6 are provided at both ends of the mount, and the rotation shaft 8 is rotatably supported by the rotation fulcrums 4 and 6. A pinion gear 10 is coaxially provided at one end of the rotating shaft 8, and a rack gear 12 meshing with the pinion gear 10 is provided on the device base 2 side. The rack gear 12 is moved by the cylinder 16 working by the force of the compressed air sent from the air tank 14, and rotates the pinion gear 10. This reciprocating movement allows the rotary shaft 8 to rotate in the forward and reverse directions. A work supporting arm 18 is provided on the rotating shaft 8 so as to project in the radial direction. Although only one work support arm 18 is shown in the drawing, a plurality of work support arms 18 actually exist depending on the shape of the work. A clamper 22 for clamping the work 20 is provided at the tip of each work support arm 18. The clamper 22 includes a pair of grips 24, 2
Clamping and unclamping are performed by having one of the gripping parts 6 and sliding one slide 26 by the slide cylinder 28. The work support arm 18 is exchanged depending on the size of the work 20. In order to facilitate this exchange, the work supporting arm 18 is provided on the rotating shaft 8 via a one-touch holder 29. Further, before the clamper 22 clamps, a nest 30 for supporting the work piece in a stable posture is provided on the apparatus base 2 side. Although a plurality of nests 30 are actually provided, only one is shown in the drawing. Further, a detection sensor 32 for detecting that the work 20 has been put into the nest 30 is provided near the nest 30. The balancer 34 is attached to the other end of the rotary shaft 8 through a balancer 34.
36 is provided so as to project in the turning radius direction. The balancer 36 is replaced according to the weight of the work 20 to be reversed, so that the inertial moment about the rotating shaft 8 caused by the weight of the work 20 is canceled by the inertial moment similarly generated by the weight of the balancer 36. ing.

Also, a damper interference arm is provided near the balancer 36.
38 is provided, and an interference head 40 is attached to the tip in both directions of rotation. The position of the interference head 40 is set on the damper head 44 of the shock damper 42 provided on the apparatus base 2 side at the position where the work 20 ends the 180 ° rotation and the position where the work 20 ends the 180 ° reverse rotation. It is in contact position.

Next, the operation of this embodiment will be described. The work 20 is carried in by a loader (not shown) from the previous step before performing the reversal, and is loaded to the left side (side 1) in the figure of the work reversing device of the present embodiment. By this input, the work 20 is stored in the plurality of nests 30. At this time, the gripping portion 26 of the clamper 22 is open, and the work 20 is located inside the clamper 22. This detection is detected by the detection sensor 32, and the operation of the work reversing device of this embodiment is started.
First, the slide cylinder 28 of the clamper 22 works to close the two grips 24 and 26 and clamp the work 20. As a result, the work 20 is firmly supported by the work supporting arm 18. Then, the cylinder 16 operates by the action of the compressed air sent from the air tank 14, the rack gear 12 moves forward (moves leftward in the figure), and the pinion gear 10 and the rotating shaft 8 rotate clockwise. At the same time, the work support arm 18, the balancer 36, and the damper interference arm 38 also rotate. When the rotating shaft rotates 180 °, the interference head 40 comes into contact with the damper head 44 of the shock damper 42 to soften the shock and stop the rotation. At this time, the work 20 is positioned and supported by a nest (not shown) provided on the right side (side 2) in the figure. Then, the slide cylinder 28 of the clamper 22 works to open the grip portion 26. As a result, the work 20 is turned by 180 ° and turned over, so that the work is turned upside down. An unloader (not shown) carries out the work 20 turned upside down to the next step. Thereafter, the rotating shaft 8 rotates counterclockwise in a manner completely opposite to the above procedure, returns to the initial state, and waits for the next work to be loaded.

In the above embodiments, the interference head 40 is provided at the tip of the damper interference arm 38, but in other embodiments, it may be provided at the balancer arm 34 provided with the balancer 36. Also, without providing an interference head,
The shock damper 42 may be positioned near the work support arm 18, and the damper head 44 may be brought into contact with the work support arm 18 that has finished 180 ° rotation. Also in this case, the shock at the time of rotation can be softened.

As described above, according to the work reversing device of the present invention,
The inertial moment around the rotation shaft generated by the weight of the work is canceled by the inertial moment in the opposite direction generated by the weight of the balancer, so that the rotation can be stably performed. Further, when the rotation is stopped, the shock damper works to reduce the impact. Further, the rack-and-pinion type drive device can give stable rotation to the rotating shaft with a simple structure. Therefore, it is possible to obtain a work reversing device capable of performing stable rotation with less impact.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a work reversing device according to an embodiment of the present invention. 2 ... Device base, 8 ... Rotating shaft, 18 ... Work support arm, 20 ... Work, 22 ... Clamper, 36 ...
Balancer, 38 …… Damper interference arm, 40 …… Interference head, 42 …… Shock damper.

Continuation of the front page (56) Reference JP-A-63-74849 (JP, A) JP-A-57-121522 (JP, A) Actually open 1-21131 (JP, U) Actually open 62-174833 (JP , U) Actually opened 62-5130 (JP, U) Actually opened 62-123846 (JP, U) Actually opened 48-62772 (JP, U) Actually opened 61-59215 (JP, U) 49-9869 (JP, B1) JP-B 43-4583 (JP, B1) JP-B 48-102 (JP, B1) JP-A 56-39331 (JP, Y2) JP-B 55-24671 (JP, Y2) Actual public Sho 51-47333 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft which rotates 180 degrees with respect to an apparatus base, a rack and pinion type drive means for rotating the rotary shaft, and a rotary shaft which is fixed to the rotary shaft and projects in a radial direction of rotation. A work support arm, a clamper for clamping a work, a balancer provided on the rotary shaft side and protruding in the rotary radius direction, and a balancer provided on the device base side and in contact with the rotary shaft side when rotating. A work reversing device that is equipped with a shock damper that softens shocks.