JPH0211339B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic finger feeding device in a transfer press.

A transfer press is an automatic press that continuously performs press processing by feeding products (workpieces) sequentially to a station equipped with a series of press molds for drawing, edge cutting, hole punching, etc. while synchronizing the timing with the press. It is used in the area.

Currently, in order to efficiently replace molds in transfer presses, it is being considered to place molds on carriers and carry them in and out together with the carriers.

Specifically, as shown in Fig. 1, a pair of feed bars 1 with a large number of fingers arranged at required intervals along the press line move toward and away from each other, move up and down, and reciprocate in the direction of the press line to produce a product. is moved in a three-dimensional rectangular motion of gripping, raising, feeding, processing, releasing, and returning, and the product is molded into mold 2A...2.
In a configuration in which press working is performed continuously while sequentially feeding the product to the position F, a carrier 4 is provided on the bed 7 so as to be movable in a direction intersecting the product feeding direction 3.
Attach molds 2A...2F to and feed bar 1.
Feed bar cradle 3 installed on carrier 4
The feed bar 1a on the work station side supported on the press line 9 and the feed bar 1b on the idle station 6 side between the uprights 5, 5 installed on both sides of the press line are divided, and the work station side feed bar 1a is supported only by the carrier 4. At the same time, a backup carrier 4' having the same structure as the carrier 4 is placed on standby on one side of the transfer press, and a new mold 2A'...2 is placed on the backup carrier 4'.
F' is installed, and when replacing the mold, the work station side feed bar 1a is separated from the idle station side feed bar 1b and the carrier 4 is mounted.
is moved from above the bed 7, a backup carrier 4' is moved onto the bed 7 in exchange, and the feed bar 1a' on the backup carrier 4' is connected to the feed bar 1b on the idle station side.

By the way, in the transfer press described above, each finger must be replaced to match the shape of the workpiece when replacing the mold, but in this case, the upright becomes an obstacle at the idle station, so
When replacing the fingers, a worker had to enter the press to replace the fingers, which was both inefficient and dangerous work.

Recently, automatic finger feeding devices have been devised so that the fingers on the idle station side can be easily replaced, but conventional automatic finger feeding devices move the fingers on this part to the carrier side using power from a hydraulic cylinder, etc. Since this configuration requires a specific power and a specific cycle time, there are problems in that the manufacturing cost increases and a quick and reliable finger transfer cannot be achieved.

In view of the above, the present invention has been made in order to provide an automatic finger feeding device that can move the idle station side finger to the work station side without requiring special power and special cycle time.

Embodiments of the present invention will be described below with reference to the drawings.

Embodiments of the present invention will be described below with reference to the drawings.

An appropriate frame 9 is fixed to the upper surface of the idle station 6 side end of the feed bar 1a on the work station 8 side on the carrier 4, and the frame 9 has the following:
A shaft 10 extending horizontally perpendicular to the product feeding direction 3 is rotatably mounted via a bearing 11. One end of the shaft 10 is extended toward the outside of the press line, and one end of a lever 12 is fixed to the extended end. A horizontal shaft 13 parallel to the shaft 10 is rotatably attached to the other end of the lever 12,
A finger mount 14 was fixed to the shaft 13, and a sprocket 15 was fixed to the frame 9 so as to be concentric with the shaft 10, and a sprocket 15 was fixed to the finger mount 14 so as to be concentric with the horizontal shaft 13. Sprocket 16 and endless chain 1
By multiplying the axis 10 by multiplying
It allows you to turn around. The finger mount 14 is provided with a pair of finger holding devices consisting of a block 19 having a finger insertion hole 18 and a handle 21 for locking a finger 20 on the idle station side into the insertion hole 18. Further, a stopper 22 for receiving the finger mount 14 is provided on the feed bar 1a on the work station side.

A rack 24 that meshes with a pinion 23 provided on the shaft 10 is provided on the frame 9 so as to be movable in the longitudinal direction of the feed bar by means of a guide block 25, and a spring 27 is provided between the end of the rack 24 and a rack cover 26, so that the rack 24 can be moved freely in the longitudinal direction of the feed bar. A resilient force in the direction of the idle station 6 is applied to cause the tip of the rack 24 to protrude toward the idle station 6. The end of rack 24 is rack 2
4 is provided with a stepped portion 28 that defines the stroke end on the idle station side, and when the feed bar is in the unclamped state as shown in FIGS.
I try to put it on top. The tip of the rack 24 is formed into a hook shape.

A contact piece 29 whose distal end is hook-shaped so that it can engage with the distal end of the rack 24 is slidably provided in a cylinder 30 fixed to the feed bar 1b on the idle station side. A spring 31 having a larger elastic force than the spring 27 on the rack side is provided between the cylindrical body 30 and the spring 31 which applies a force in the direction of the work station 8 to the abutting piece 29. The leading end of the workstation 8 protrudes toward the workstation 8 side. Contact piece 2
A stepped portion 32 defining a stroke end of the contact piece 29 on the work station side is provided at the distal end of the contact piece 9 .

Further, a stroke rod 33 is provided at a position near the stopper 22 of the feed bar 1a on the work station side so as to be able to move up and down, and the upper end of the stroke rod 33 is made to protrude upward from the upper end of the stopper 22 by a spring 34. When the finger mount 14 is placed on the stopper 22, the stroke rod 33 is pushed down, and the lower end of the stroke rod 33 hits the limit switch 35 provided on the feed bar holder 39 to detect that the finger mount 14 is placed on the stopper 22, and the feed bar 1a
and the feed bar pedestal 39 are automatically locked.

Further, a locking bracket 36 for locking the finger mounting base 14 is provided on the upper surface of the feed bar 1b on the side of the idle station 6.

In the above configuration, when the feed bar 1a on the work station side is moved in the direction of the idle station 6 from the unclamped state shown in FIG. 2 in order to connect the feed bar, both springs 2
7 and 31, the spring 27 on the rack side is initially bent to allow rotation of the shaft 10 in the direction a, and this rotation of the shaft 10 causes the finger mounting base 14 to move toward the idle station 6 side. . After the finger mount 14 arrives on the feed bar 1b due to the initial horizontal movement amount X of the feed bar 1a, the spring 31 on one side of the contact is bent, and the finger mount 14 moves over the feed bar 1b by the remaining horizontal movement amount Y of the feed bar 1a. The upper surface of the feed bar 1b is slid a predetermined distance y in the direction of the idle station 6, and is completely locked to the feed bar 1b on the idle work station side by the locking bracket 36. At the same time, the feed bar clamp device 3
7 and 38 work to clamp both feed bars 1a and 1b (the state shown in FIG. 3).

When disconnecting the feed bar, perform the opposite operation to the above, and move the finger mounting base 14 with the initial horizontal movement amount Y.
and the locking bracket 36, and rotate the shaft 10 in the direction b using the remaining horizontal movement amount X to return the finger mount 14 from above the feed bar 1b to the stopper 22 in a parallel state.

Note that the present invention is not limited to only those shown in the above-mentioned embodiments. For example, as a mechanism for changing the movement of the work station side feed bar during connection/disconnection of the feed bar to rotation of the finger mount rotation axis, other than a rack pinion may be used. Various structures are possible, such as a structure using a chain sprocket and a system in which the shaft 10 and bearing 11 are fixed and the lever 12 and pinion 23 are fixed, and other various modifications may be made without departing from the gist of the present invention. Of course, there are other things that can be added.

According to the present invention, the rack, pinion, shaft, lever, and finger mount that are urged toward the idle station are mechanically interlocked by utilizing the movement of the feed bar on the work station side when the feed bar is connected/disconnected, and the idle station Since the side fingers are moved, there is no need for a drive device, and there is no need to connect a supply system for power or pressure fluid to the drive device, which reduces the need for maintenance. Furthermore, it is possible to eliminate the need for a control device for synchronizing the movement of the finger on the idle station side with the movement of the crossbar on the work station side, and a detection device for confirming the operation. It is possible to achieve the excellent effect that it is possible to perform the above operations, and furthermore that the finger mount can be fixed or the feed bar and the feed bar holder can be fixed using individual operations.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an overview of the transfer press, Fig. 2 is a front view of the feed bar in an unclamped state showing the structure and operation of the present invention, Fig. 3 is a plan view of the feed bar in a clamped state, and Fig. 4 The figure is the A-A arrow view in Figure 3, and the figure 5 is B-B in Figure 3.
6 is an explanatory diagram of the rotation conversion mechanism during feed bar unclamping as seen from the C-C direction in Fig. 4, and Fig. 7 is the feed bar clamp seen from the C-C direction in Fig. 4. Explanatory diagram of the time rotation conversion mechanism, No. 8
The figure is an explanatory diagram of the locking device of the finger mount. 1a... Feed bar on the work station side, 1b... Feed bar on the idle station side, 3... Product feeding direction, 6... Idle station, 8... Work station, 10...
Shaft, 12...Lever, 14...Finger mounting base, 15, 16...Sprocket, 17...Chain, 20...Idle station side finger, 23...Pinion, 24...Rack, 2
7, 31... Spring, 29... Contact piece, 3
7, 38...Feed bar clamp device.

Claims (1)

[Claims] 1. A shaft extending horizontally and perpendicular to the longitudinal direction of the feed bar, which is rotatably supported at a position near the idle station of the feed bar on the work station side of the transfer press, and a finger is attached to the other end with one end fixed to the shaft. a lever on which a stand is supported; a pinion attached to the shaft;
A rack movable in the longitudinal direction of the feed bar that engages with the pinion and is biased toward the idle station, an abutment piece provided on the feed bar on the idle station side that abuts the rack, and a lock that locks the finger mounting base. An automatic finger feeding device characterized by having a bracket for