JPS6127855Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a feeding device, and more particularly to a rotary transfer device that receives workpieces supplied from a previous process one by one, reverses them, and transfers them to the next process.

Conventionally, there has been a feeding device of this type as shown in FIG. That is, the rotating arm 5 has a base end fixed to the rotating shaft 1, a notch 3 for placing the workpiece 2 at the distal end, and a slide plate 4 that can freely come out and go in the notch. A small cylinder 6 that slides on the slide plate 4 is attached to the arm 5. According to this device, the workpieces 2 are placed one by one in the notch 3 from the previous step and rotated by the rotation of the arm 5 while being held by the protruding slide plate 4. At a predetermined rotational position, for example, at the position shown by the dashed line where the direction of the workpiece 2 is reversed by 90 degrees, the small cylinder 6 is operated to retract the slide plate 4. As a result, the workpiece 2 can be released from the grip and transferred to the next process while maintaining the reversed orientation. However, the drive mechanism of this feeding device requires two mechanisms: a rotation drive mechanism that rotates the rotary arm 5, and a small cylinder 6 that slides on the slide plate 4 provided separately. For this reason, the device is complicated and maintenance is also complicated.On the other hand, in this device, the rotary arm 5 is rotated to a predetermined rotation angle, and the small cylinder 6 is operated only after the rotation is completed, so there is waste in operation and there is no workpiece transfer. The disadvantage was that the cycle time was longer.

This invention was made to solve the above-mentioned conventional drawbacks, and the conventional rotating arm is divided into two parts, one being a main arm and the other being a slave arm that is driven by the main arm. The structure is such that the slide plate provided on the slave arm can be moved in and out using the rotation of the arm, and the workpiece can be rotated and transferred using only one drive mechanism, that is, the rotation drive mechanism of the arm, which simplifies the structure. The purpose of the present invention is to provide a feeding device that is inexpensive, simplifies maintenance, and shortens transfer cycle time.

Embodiments of this invention will be described in detail below with reference to FIGS. 2 and 3.

In FIG. 2, reference numeral 10 denotes a main arm, the base end of which is fixed to the rotating shaft 11, and the tip thereof provided with a long groove 12 in substantially the same direction as the longitudinal direction of the arm. It is made rotatable by meshing with a rack gear 14 which is moved up and down by a cylinder (not shown). This rotation angle is determined by the stroke of the cylinder, and in this embodiment is 90+α degrees from the position of the main arm 10 shown by the solid line to the position shown by the dashed line. A subordinate arm 15 of approximately the same length is arranged on the main arm 10 and overlaps with the main arm 10. The base end of the subordinate arm 15 is loosely fitted into the rotating shaft 13 or the base of the main arm, and the tip has a workpiece attached thereto. An L-shaped notch 17 is formed in which the workpiece 16 is placed, and the claw 18 holds the workpiece 1.
It is designed so that one side of 6 can be held. Further, a slide plate 19 is arranged in the notch 17 and is movable in parallel with the claw 18 at a width of the workpiece, so that the other side of the workpiece 16 can be held by the protrusion of the slide plate 19. A pin 20 protrudes from one side of the slide plate 19, and the pin 20 is slidably fitted into the long groove 12 of the main arm 10.

A spring 21 is stretched between the main arm 10 and the slave arm 15, and draws the slave arm 15 toward the main arm 10 to a position where it stops at its first stopper 22, so that the two arms are normally arranged in an overlapping arrangement. I will encourage you to do so. At the same time, this bias pushes up the pin 20 fitted in the long groove 12 of the main arm 10 toward the tip side, and pushes the slide plate 19 into the notch 1.
It is made to protrude from 7.

Reference numeral 23 denotes a bracket that supports the rotating shaft 11, and a second stopper 24 made of a bolt, nut, etc. and whose stop position can be adjusted is provided at a predetermined position of the bracket 23. The stopper 24 stops the slave arm 15 which has been driven by the rotation of the main arm 10.
Stopper receiver 25 fixed to (indicated by a dashed line)
, and the slave arm 15 is stopped at a position rotated by exactly 90 degrees.

Note that 26 is a stopper that restricts the return rotational position of the main arm 10.

Next, the operation of the above structure will be explained with reference to FIGS. 3A to 3C.

The main arm 10 and the slave arm 15 are in an overlapping state, and the slide plate 19 is projected from the notch 17 and stopped at a predetermined angular position, and two feeding devices are disposed in the longitudinal direction of the workpiece. In front of the notch 17 is a belt conveyor 27 from the previous process.
A large number of parallel workpieces 16 are sent in succession,
One of the bottles in the front row is placed in the notch 17 under the control of the dispensing device 28 (FIG. 3A).

A cylinder (not shown) rises, pushes out the rack gear 14, and rotates the rotating shaft 11. Main arm 10
are fixed to the rotating shaft 11, so they rotate at the same time, and the slave arm 15 is connected to the main arm 10 by a spring 21, so it rotates in synchronization with the main arm 10. At this time, the workpiece 16 is held between the claws 18 and the protruding slide plate 19, so that it is prevented from falling off or turning over due to vibrations caused by rotation. Slave arm 15 is 90
At the time of rotation, the stopper receiver 25 fixed to the slave arm 15 abuts the second stopper 24 provided on the bracket 23, and the slave arm 15 stops. (Figure 3 b).

However, since the main arm 10 is set such that the cylinder still rises, the rotation axis 1
1 rotates further. At this time, the main arm 10 is released from being driven by the slave arm 15.
At the same time, the pin 20 of the slide plate 19 disposed at the tip of the slave arm 15 is pushed down by the main arm 10, thereby starting to descend. The main arm 10 stops at the stroke end (upper limit) of the cylinder. At this time of stopping, the slide plate 19 fully retracts from the notch 17 and completely releases the holding of the other side of the workpiece 16.
The rotation angle α degrees described above means the individual rotation angle necessary for the main arm 10 to retract the slide plate 19. Thus, the workpiece 16 has its orientation 90
It is then reversed once and transported to the next step by a transfer 29. The transfer 29 is connected to the shaft 3
1, a U-shaped receiving member 23 fixed to the tip thereof and having its opening oriented at right angles to the shaft 31, and a roller rotatably supported in the opening of the receiving member 32 parallel to the shaft 31. 33, by rotating the transfer 29 (in the direction of arrow a), the workpiece 16 is put into the opening, and the friction generated by the rollers 33 is reduced to prevent the receiving workpiece from shifting in its axial direction. Lift it up from the notch 17. Next, the shaft rod 31 is pulled and moved in the direction of the arrow D, and this time it is rotated in the opposite direction to the direction of the arrow a, and placed on the shape receiving jig for the next step (FIG. 3C).

The above-mentioned return of loading is performed by lowering the cylinder and rotating the rotating shaft 11 in the reverse direction, thereby returning the main arm 10 and the slave arm 15 to their initial positions.

As mentioned above, according to this invention, it is possible to move, hold, and release the workpiece simply by rotating the rotary shaft, and this holding release is performed simultaneously when a predetermined rotation angle is reached. Cycle time is significantly reduced compared to conventional methods. Further, since the movement is rotational movement, the orientation of the workpiece can be changed, and since the mechanism for performing these operations is simple, it produces remarkable practical effects such as cost reduction and easy maintenance.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional feeding device and its operation, Fig. 2 is a front view showing an embodiment of the feeding device of this invention and its operation, and Fig. 3 A to C are perspective views illustrating the same operating state. It is. 10... Main arm, 11... Rotating shaft, 12... Long groove,
15...Subordinate arm, 16...Workpiece, 17...Notch,
19...Slide plate, 20...Pin, 21...Spring, 24...Stopper.

Claims (1)

[Scope of utility model registration request] A main arm whose base end is fixed to the rotating shaft and a long groove is provided at the tip, and a subordinate arm which is overlapped with the main arm, whose base end is loosely fitted to the rotating shaft or the base of the main arm, and a workpiece is mounted on the tip. a subordinate arm having a notch formed therein, the main arm having a pin that slidably fits into the long groove of the main arm, and a slide plate that can freely move in and out of the notch by sliding the pin; a spring stretched between the slave arm and the main arm to cause the slave arm to follow the main arm and to bias the slide plate so as to project at all times; and a stopper for stopping the rotation, and when the rotation of the rotating shaft exceeds the predetermined rotation angle, the main arm is released from being driven by the slave arm and the slide plate is retracted from the notch. Device.