JP2017209723A - Circular transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer device capable of miniaturizing a press machine by arranging circularly the whole transfer device, and thereby reducing cost.SOLUTION: A transfer device comprises at least one row of transfer bars having a plurality of holding means capable of holding and releasing a workpiece, and movable in the circumferential direction or vertically, and driving means for moving the transfer bars. In the transfer device, the holding means and the transfer bars are arranged circularly.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transfer device for supplying a workpiece to a metal press machine.

  When a metal part is press-molded to produce a product, a complicated shape requires a number of press operations. In such a case, a metal mold having a complicated shape can be manufactured with one press machine by arranging press dies in one row and sequentially moving the workpiece. At this time, a transfer device is used to move the workpiece.

  The structure of a general two-dimensional transfer apparatus is shown in FIG. In (a), the workpiece 101 is placed on each of the workpiece stages 31 arranged in a line when the upper mold is raised. A pair of arms 12 are arranged on both sides of each workpiece stage 31.

  In (b), the arm 12 is extended by the arm driving means 13 to hold the workpiece 101 from both sides. Since the arm 12 and the arm driving means 13 are installed on the transfer bar 11, each workpiece is moved to the next workpiece stage 31 by moving the transfer bar 11 downward in FIG. Sent.

  In (d), each workpiece 101 is placed on a new workpiece stage 31 by retracting the arm 12. In this state, as shown in (e), the upper die 32 is lowered, and the workpiece 101 is press-molded. At this time, as shown in (f), the transfer bar 11 returns to the original position. The workpiece 101 can be sequentially transferred by repeating this series of operations.

  However, when the shape of the parts becomes complicated, the number of press operations increases, and more press dies have to be arranged accordingly, which causes a problem that the press machine becomes large.

  In order to solve the above problems, for example, Patent Document 1 proposes a multi-row transfer device in which a plurality of grooves are provided in a transfer slide plate and a workpiece is held in the grooves. In this technology, it is possible to move a plurality of workpieces simultaneously by moving the multi-row transfer slide plate, but means for holding and releasing the workpieces in the respective grooves of the transfer slide plate is provided. Since a plurality of transfer slide plates must be provided, the structure of the transfer slide plate becomes complicated, leading to an increase in manufacturing cost. In addition, since the transfer slide plate is a reciprocating type, the number of workpieces to be held decreases when reciprocating for each press operation, and when the transfer slide plate is returned for each press operation, the transfer slide plate The operation of the plate becomes discontinuous, causing a problem in cooperation with the press machine. Also, as the transfer slide plate moves, the workpiece in the groove moves linearly, and many products can be manufactured at the same time, but the shape is complicated and many molds are used. In the case of products, since the transfer slide plate becomes long, the press machine must be enlarged as a result.

  Further, in Patent Document 2, a plurality of products can be produced at one time by configuring a reference plate with a plurality of lines and moving a workpiece positioned on each reference plate simultaneously and sequentially by a transfer unit. Transfer molds have been proposed. Also in this technique, only by providing a plurality of reference plates, the workpiece only moves linearly on each reference plate. Therefore, the same problem as in the case of Patent Document 1 remains.

JP-A-8-252698 Special table 2015-514592 gazette

  The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to realize a compact press machine by arranging the entire transfer device in a circular shape, thereby reducing costs. To do.

  In order to solve the above-described problems, the transfer device according to the present invention includes a plurality of holding means capable of holding and releasing a workpiece, and at least one row of transfer bars movable in the circumferential direction or up and down, In the transfer device including the driving means for moving the transfer bar, the holding means and the transfer bar are arranged in a circle. In the two-dimensional transfer, the transfer bar moves only in the front / rear and left / right directions, whereas in the three-dimensional transfer, the vertical movement is added to the transfer bar. In addition, when moving the transfer bar while holding the workpiece, there are cases where the material itself is moved and when the material is placed on a jig or the like and moved together with the jig. It is desirable to be able to cope.

  It is preferable that the transfer bars are arranged in one row, and the holding means is configured to hold and release the workpiece from one side.

  Moreover, it is also preferable that the transfer bar has two rows, and the holding means is configured to hold and release the workpiece from both sides.

  In the transfer device according to the present invention, the length of the entire press molding can be shortened by moving the workpiece along the circumference, thereby reducing the size of the press machine, thereby reducing the cost of the product. It becomes.

  Hereinafter, preferred embodiments of the present invention will be described based on examples. FIG. 1 shows a transfer apparatus according to the present invention. The basic components of the transfer device according to the present invention are almost the same as those of the conventional transfer device. However, while the conventional transfer device linearly arranges these members, the transfer device according to the present invention arranges them in a circular shape. Transfer bars 11 and 21 are arranged along the outer side and the inner side of a plurality of workpiece stages 31 arranged in a circular shape, respectively. For each workpiece stage 31, a pair of arms 12, 22 and driving means 13, 23 for these arms are arranged.

  The operation of the transfer apparatus according to the present invention will be described with reference to FIG. Another workpiece supply device (not shown) supplies the workpiece 101 to one of the workpiece stages 31. Each arm 12 and 22 extends to hold the workpiece 101 from both sides. The arms 12 and 22 are stretched by arm driving means 13 and 23. Next, when the transfer bars 11 and 21 rotate in the same direction, the workpiece 101 is moved to the next workpiece stage 31. At this point, the arms 12 and 22 are retracted to release the workpiece 101. Thereafter, after the upper die is lowered to form the workpiece 101, the same operation is repeated.

  FIG. 2 shows another embodiment of the transfer apparatus according to the present invention. In the embodiment shown in FIG. 1, the workpiece 101 is supported and held from both sides, but in this embodiment, the arm 22 is disposed only inside the workpiece stage 31. Accordingly, the transfer bar 21 is also arranged only inside. In this embodiment, since the transfer bar, the arm, and the arm driving means are arranged only on one side, the member cost is reduced, but the arm needs to be provided with an opening / closing means to hold the workpiece.

  FIG. 3 shows still another embodiment. In FIG. 2, the arm 22 is disposed only on the inner side of the workpiece stage 31, but in the present embodiment, on the contrary, the arm 12 is disposed only on the outer side of the workpiece stage 31. In this embodiment, when the radius of the workpiece stage is the same, the size of the transfer device itself is larger than in the case of FIG. 2, but the arm 12 and the arm drive means 13 are connected to the workpiece stage 31. By disposing outside, the machine configuration becomes easy.

  In the transfer device according to the present invention, the length of the entire press molding can be shortened by moving the workpiece along the circumference, thereby reducing the size of the press machine, thereby reducing the cost of the product. It becomes. Therefore, the present invention can greatly contribute to the manufacture of complex-shaped metal parts.

It is a top view which shows the Example of the transfer apparatus by this invention. It is a top view which shows another Example of the transfer apparatus by this invention. It is a top view which shows another Example of the transfer apparatus by this invention. It is explanatory drawing explaining operation | movement of the conventional transfer apparatus.

11 (outside) transfer bar 12 (outside) arm 13 (outside) arm driving means 21 inner transfer bar 22 inner arm 23 inner arm driving means 31 workpiece stage 32 upper mold 101 workpiece

Claims (3)

In a transfer apparatus having a plurality of holding means capable of holding and releasing a workpiece, and comprising at least one row of transfer bars movable in the circumferential direction or vertically, and drive means for moving the transfer bars The transfer device, wherein the holding means and the transfer bar are arranged in a circle. 2. The transfer apparatus according to claim 1, wherein the transfer bars are arranged in a row, and the holding means is configured to hold and release the workpiece from one side. 2. The transfer apparatus according to claim 1, wherein the transfer bars are arranged in two rows, and the holding means is configured to hold and release the workpiece from both sides.