JPS6344189Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a finger attachment device for a conveyance mechanism of a press machine.

As a transfer mechanism for a press machine, there is one in which a plurality of workpiece carrying fingers are bolted to a transfer beam connected to a three-dimensional feed mechanism. The fingers engage the workpiece and transport the workpiece from one processing station to the next as the transfer beam is driven. In such transport mechanisms, when the shape of the workpiece needs to be changed, either the fingers are replaced individually or the entire transport beam is replaced. However, in the former case, it takes a long time for replacement and adjustment, and in the latter case, the whole beam, which is heavy, needs to be replaced, so there are problems in that the replacement time becomes long and the equipment cost increases.

Japanese Patent Publication No. 53-30383 discloses a finger attachment device in which a plurality of fingers are attached to a finger bar, and the finger bar is detachably attached to a transfer beam. However, in this configuration, the finger bars are placed on the transfer beam and have a fixed structure in which they are clamped in places by triangular grooves. Therefore, the rigidity of the finger bar in the vertical direction is insufficient, and the strength is insufficient for connection to a three-dimensional feeding mechanism that conveys a workpiece in the vertical direction.

In order to improve the strength, it is conceivable that the finger bars be housed in slots formed in the transfer beam for reinforcement. However, in this case, if an unreasonable force is applied to the finger, a large force is applied to the finger bar via the finger,
There is a risk of permanent deformation of the retaining metal fittings and beam.

This invention solves this drawback, and while maintaining the ease of replacement due to the separate structure of the finger and finger bar, it is possible to increase the overall rigidity, and moreover, it is possible to increase the rigidity of the beam as a whole when excessive force is applied to the finger. The purpose is to prevent large forces from being transmitted.

Referring to the drawings, reference numeral 10 denotes transfer beams, and although only one of them is shown in the drawings, a pair of transfer beams are provided with an interval between them, sandwiching a die set of a press machine (not shown). A holding fitting 12 fixed to the beam 10 by a bolt 11 has a U-shaped cross section and a slot 121 that opens inward. Reference numeral 13 denotes a finger, which is fixed on the finger bar 14 as described later. A plurality of fingers 13 are provided on each finger bar 14 at intervals. finger 13
The tip of the finger bar forms a recess 131 and serves to support a workpiece between it and a similar recess in the finger on the opposite finger bar. Each finger bar 1
4 is inserted into the slot 121 of the corresponding holding fitting 12 with the finger 13 attached.

The finger 13 is attached to the finger bar 1 by a bolt 20 with a finger height adjustment spacer 18 in between.
It is fastened and fixed on 4. In order to enable insertion of the finger bar 14 into the slot 121 with the finger attached, the end of the finger is bifurcated with a notch 133 in the center. On the other hand, a notch 123 is formed adjacent to the upper bottom surface of the holder 12 so that the forked portion fits therein, and
A protruding portion 124 between the notches 123 is adapted to fit into a notch 133 of the finger. Due to this configuration, the attachment point of the finger 13 to the finger bar 14 constitutes the weakest point in terms of strength.

The means for fixing the finger bar 14 to the holding fitting 12 is configured as a lever type that can be easily attached and detached.
That is, the sleeve 22 is fitted and fixed onto the holding fitting 12, and the outer cylinder 24 is fitted and fixed thereon. A lock pin 26 is slidably fitted into the sleeve 22 and is urged outwardly by a spring 28. A cam 30 is located at the upper end of the pin 26, and this cam 30
4 is connected to a rotatable shaft 32, and a lever 36 is attached to the outer end of the shaft 32 protruding from the outer cylinder 24. Therefore, when the lever 36 is turned in the direction of the arrow, the spring 2
8, the pin 26 is inserted into the sleeve 22 as shown in FIG.
It moves between an open position located inside the sleeve 22 and a locked position protruding from the sleeve 22 as shown in FIG. On the other hand, a lock hole 141 is bored in the finger bar 14, and the tip of the lock pin 26 engages with the lock hole 141 in the position shown in FIG. Thus, the holding fitting 12
It becomes possible to fasten the finger bar 14 to.

The shape of the finger 13 and the thickness of the spacer 18 differ depending on the parts in progress, but in this invention, the finger bar 1
A plurality of assemblies in which fingers 13 are fixed to 4 are prepared in advance for each work-in-progress component. One assembly that matches the parts in progress is selected and inserted into the slot 121, and when the lever 36 is turned, the finger bar is locked to the holding metal fitting 12.

As described above, in this embodiment, by rotating the lever 36, it is possible to lock with one touch, so to speak.
Compared to the conventional method of replacing fingers by attaching them to the beam one by one with bolts, the replacement time is extremely shortened. In addition, when installing fingers one by one, it is necessary to adjust the installation position, which takes a considerable amount of time, but with this invention, the fingers are already attached to the finger bar as an assembly, so such adjustment is not necessary. In this sense as well, replacement time can be saved. Further, since the finger bar 14 can be manufactured at a very low cost, the structure of the present invention does not increase the cost. Furthermore, it is easy to store as an assembly in which the finger is attached to the finger bar.

While the workpiece is three-dimensionally transferred by the finger 13, a vertical force acts on the finger bar 14. When this vertical force is applied, since the finger bar 14 is housed in the slot 121, such force can be received by the holding fitting 12, and as a result, high rigidity can be exhibited. In addition, in the case of an abnormal conveyance in which a force exceeding the rigidity is applied, a notch 133 is formed at the base of the finger, and this part is the weakest part, and this part does not come into contact with the holding fitting 12. Even if such an abnormal force occurs, the finger 13 will only break, and no permanent distortion will occur in the holding fitting 12 or the beam 10. That is, it is only necessary to replace the fingers, and there is no need to replace other parts, so that losses can be kept to a minimum.

In the embodiment of FIGS. 5 and 6, a slot 101 is formed in the beam 10. The finger 13 is fastened to the finger bar 14 with the bolt 20, which is the same as in the previous embodiment, but the finger and the slot do not have cutouts like 123 and 133 in the previous embodiment, so the shape is simplified. They differ in that they are Another difference is that the finger bar 14 and the beam 10 are locked together by a bolt 40 instead of a lever mechanism.

In this embodiment, unlike the first embodiment, the finger 13 is not provided with a notch, but its wall thickness is smaller than that of the finger 14 (see FIG. 6), so that a hole for the bolt 20 is formed. formed,
The connection portion between the finger and the finger bar is the weakest portion due to stress concentration. Therefore, if an unreasonable external force is applied to the finger, the finger will break first, thereby preventing the unreasonable force from being transmitted to the beam.

As described above, in the present invention, the finger bar with a plurality of fingers attached thereto is inserted into the slot provided in the holding metal fitting or the transfer beam itself, and is removably locked by the locking means, thereby converting the fingers. The work is made easier, and at the same time, the vertical rigidity of the finger bar can be increased, and the point where the finger is attached to the finger bar is the weakest point in terms of strength, in order to provide cushioning in the event of an abnormality due to the increased rigidity. By doing so, the force at the time of an abnormality is absorbed by the fingers, and there is no risk of permanent deformation being applied to other parts, and therefore it is possible to have a configuration suitable for connection to a three-dimensional feeding mechanism.

[Brief explanation of drawings]

Fig. 1 is a top view of the finger attachment device according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is an exploded perspective view. 5 is a top view of another embodiment, and FIG. 6 is a sectional view taken along the line - in FIG. 5. 10...Transfer beam, 12...Holding metal fittings, 13...Finger, 14...Finger bar,
26...Lock pin, 36...Lock lever, 4
0...Rock bolt, 101, 121...Slot.

Claims (1)

[Scope of utility model registration request] In a transfer mechanism for transferring a workpiece in a press machine, an inwardly opening slot is formed in a holding fitting fixed to a transfer beam connected to a three-dimensional feed mechanism for the workpiece or in the transfer beam itself, and It has a finger bar that is inserted into the slot, and a plurality of workpiece carrying fingers are connected to the finger bar at intervals by a loosenable connecting means such as a nut, and the finger bar is freely attachable to and detachable from the holder or the transfer beam. The finger has a notch or its wall thickness is set smaller than that of the finger bar, and the connection part with the finger bar by the connecting means is the weakest part in terms of strength. Finger attachment device.