JPH0227940Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a transfer device for transferring press work pieces onto molds for successive processes in a transfer press that press-forms automobile body parts, for example. In particular, the present invention relates to improving ramps of workpieces during workpiece transportation.

[Prior art]

BACKGROUND ART Conventionally, in press molding of car body parts and the like, a so-called transfer press is performed in which the press work is sequentially transferred onto a mold tool for successive steps and subjected to, for example, drawing, drilling, and trimming.

In such a transfer press, in order to convey the work onto the mold tool for the next process, the rectangular movement of the transfer bar, which moves upward, forward, downward, and backward, is used to convey the work (for example,
(Refer to Publication No. 57337). During this transportation, it is necessary to clamp the workpiece to prevent it from shifting or falling off. Therefore, in conventional workpiece transportation devices, a cylinder for clamping is provided separately from the cylinder for transportation. Therefore, as a matter of course, this conventional device requires air piping for supplying compressed air to the clamping cylinder.

However, since the clamp cylinder moves with the movable parts of the device, the air piping needs to be connected using a flexible hose or the like so as not to interfere with the operation of the device. However, there were problems in that a clamping cylinder was required and the air piping became complicated.

[Purpose of invention]

The present invention was devised in view of the problems of the conventional device described above, and provides a workpiece conveyance device for press working that can easily clamp the workpiece with a simple structure that does not require a clamping cylinder like the conventional clamping cylinder. The purpose is to

[Structure of the idea]

The inventor of the present invention points out that in a workpiece conveyance device for press processing, the transfer bar moves rectangularly to convey the workpiece, so the transfer bar always moves up and down once for each pitch of the workpiece. Focusing on this transfer bar,
It was discovered that the workpiece can be clamped and unclamped in a timely manner by using the downward motion. That is, the present invention fixes the guide bar below and parallel to the transfer bar,
A clamp metal is swingably attached to the work clamp part of the transfer bar, a leaf spring is provided between one end of the clamp metal and the transfer bar, and a pressing rod is movable up and down to the transfer bar, and a plate spring is provided between one end of the clamp metal and the transfer bar. When the transfer bar descends, the pressing rod comes into contact with the guide bar, deforming the leaf spring, and the clamp rotates to unload the workpiece. When the workpiece is clamped and the transfer bar rises, the leaf spring returns to its original shape and the clamp metal rotates to its original position, thereby clamping the workpiece.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of the present invention. In the figures, 1 is a press die which is a fixed part of a press device, and a guide member 3 of a vertical drive device 2 is installed upright on the press die 1. and a guide rod 4 inserted into the guide member 3 so as to be vertically movable.
A vertically movable board 4 is installed between the upper ends of a. A piston rod 5a of a vertically movable cylinder 5 is connected to the substrate 4, and the cylinder 5 is fixed on the press die 1, and a support having a support roller 4b at the upper end is provided on the upper surface of the vertically movable substrate 4. A rod 4c is erected.

Further, a horizontal movement cylinder 7 of a horizontal drive device 6 is fixed to the rear side of the upper surface of the vertical movement board 4, and a piston rod 7a of the cylinder 7 is connected to a drive member 8. is fixed to a transfer bar 9 which is horizontally movably placed on the support roller 4b.

The transfer bar 9 is a pair of rod-shaped members disposed on the left and right sides of the mold 15, for example, as shown in FIG. 9a are recessed at predetermined intervals, and an engaging protrusion 9c is provided on the periphery of the upper opening of the storage chamber 9a at a position covered by the work 16 inside the flange of the work 16. 16 from moving in the horizontal direction. An engaging claw 10a for clamping a workpiece is formed at the tip of the clamp metal 10,
Further, one end of a leaf spring 12 is connected to the rear end, and the other end of the leaf spring 12 is connected to the side wall of the accommodation chamber 9a by a pin 12a.

A pressing rod 13 is inserted into a sliding hole 9b bored in the bottom of the storage chamber 9a so as to be able to move up and down. A stopper portion 13a is formed in the middle of the spring 12, and a guide roller 13b is rotatably attached to the lower end.

Further, a guide bar 14 is disposed below the transfer bar 9 in parallel with the transfer bar 9. The guide bar 14 is fixed on the press die 1 and is connected to the transfer bar 9.
When the pressure rod 13 is lowered, the guide roller 13 of the pressure rod 13 is lowered.
It is now possible to make contact with b.

Next, the effects will be explained.

In the apparatus of this embodiment, the workpiece 16 is transported in the following manner. That is, when the vertical cylinder 5 of the vertical drive device 2 extends, the transfer bar 9 rises, and the workpiece 16 on the mold 15 is transferred onto the transfer bar 9 during this upward movement.

When the horizontal movement cylinder 7 of the horizontal drive device 6 expands in this state, the transfer bar 9 moves forward (to the right in the figure) and the work 16 is positioned above the adjacent mold.

Here, when the vertical movement cylinder 5 contracts,
The transfer bar 9 descends, and during this descent, the workpiece 16 on the transfer bar 9 is transferred onto the adjacent mold.

Then, the horizontal motion cylinder 7 contracts and the workpiece 16 on the transfer bar 9 returns to its original position, and the workpiece 16 is pressed using the next mold.

Furthermore, clamping of the work 16 during transportation is performed in the following manner.

First, when the vertical movement cylinder 5 is contracted and the transfer bar 9 is in the lowered position, the pressing rod 1
3, the guide roller 13b comes into contact with the upper surface of the guide bar 14 and is pushed upwards, so that the upper end of the pressing rod 13 curves the leaf spring 12 upwards, so that the clamp metal 10 is moved as shown in FIG. It has swung to the unclamp position shown.

Next, in the above operation, the transfer bar 9 is raised by the vertical drive device 2, and with this elevation, the workpiece 16 is transferred from the mold 15 onto the transfer bar 9, and the engaging protrusion 9c is attached to the side wall of the workpiece 16. It abuts from the inside and engages the workpiece 16, and at the same time the guide roller 13 of the pressing rod 13
b and the guide bar 14 are separated, the leaf spring 12 returns to its original straight state, and the clamp metal 10 rotates clockwise in FIG. 2. As a result, the engagement claw 10a
clamps the flange portion 16a of the workpiece 16 (see FIG. 2). In this state, the transfer bar 9 moves forward and the workpiece 16 is transferred onto the adjacent mold (operation).

Further, when the transfer bar 9 is lowered by the above operation, the pressing rod 13 is moved upward, the leaf spring 12 is bent, the clamp metal 10 is rotated counterclockwise, and the workpiece 16 is unclamped, and in this state, the above operation is performed. This causes the transfer bar 9 to retreat and return to its original position. In this case, the guide roller 13b of the pressing rod 13 rotates on the guide bar 14.

Although the above embodiment has been described using an apparatus in which a pair of transfer bars 9 are provided, there may be one transfer bar depending on the shape of the workpiece to be pressed.

Further, the direction of action of the clamp metal 10 is
It does not necessarily have to be the same as the conveyance direction in 6.
It is set appropriately depending on the shape of the workpiece, etc.

In this way, in this embodiment, the transfer bar 9
As the clamp metal 10 is raised and lowered, the clamp metal 10 is rotated to its clamp position and unclamp position, so the work piece 16 can be easily clamped with a simple structure without the need for a conventional clamp cylinder or complicated piping. Can be clamped.

[Effect of idea]

As described above, according to the workpiece conveyance device for push processing according to the present invention, the clamp metal is swingably provided on the transfer bar, and the clamp metal is swung between the clamping position and the unclamping position by raising and lowering the transfer bar. Since a pressing rod and a leaf spring are provided, the workpiece can be clamped by utilizing the vertical movement of the transfer bar, and the structure can be simplified by eliminating the need for a conventional clamping cylinder and air piping.

[Brief explanation of drawings]

1 and 2 are sectional views of main parts of a workpiece conveyance device in press working according to an embodiment of the present invention, FIG. 3 is an overall configuration diagram of the above embodiment, and FIG. 4 is a part of the above embodiment. A plan view and a sectional view, and FIG. 5 is a plan view of a main part of the above embodiment. 2, 6... Drive means, 9... Transfer bar, 10... Clamp metal, 12... Leaf spring, 13
...Press rod, 14...Guide bar, 15...
Mold tool, 16...Press work.

Claims (1)

[Scope of utility model registration request] A transfer press is a device that sequentially transports the press work onto the mold tool for the next process, and uses a drive means to move up, move forward, lower, and retreat, and also lifts the work from the mold tool during the ascent and lowers it. A transfer bar that places the workpiece on the mold midway, a guide bar that is attached below the transfer bar and parallel to the bar to the device fixing part, and a guide bar that is slidably attached to the work clamp part of the transfer bar. a plate spring having one end connected to the non-clamping end of the clamp metal and the other end connected to the transfer bar;
A press rod is attached to the transfer bar so as to be able to move up and down, and when the transfer bar is lowered, the press rod contacts the guide bar, bends the leaf spring upward, and swings the clamp metal to the unclamping position. , when the transfer bar rises, the leaf spring becomes straight, swings the clamp metal to the clamp position, and clamps the workpiece by pressing the peripheral edge of the workpiece from above with an engaging claw at the end of the clamp metal. Workpiece conveyance device in press processing.