Transfer bar

Abstract

A connection device (1) for connecting a remaining bar (26) and a movement bar (28) of a transfer bar (1) is configured of a remaining clamp (3) and a movement clamp (4). A male fitting section (K1) and a female fitting section (K2) which fit to each other in the connection direction are provided to the clamps (3, 4) so as to serve as a first connection section (R1). A male engagement section (44) and a female engagement section (33) are contained within the clamps (3, 4) so as to serve as a second connection section (R2). The female engagement section (33) of the second connection section comprises spheres (36) serving as movement members which move in the direction perpendicular to the connection direction. The female engagement section (33) is engaged with and disengaged from the male engagement section (44) by the movement of the spheres (36).

Description

technical field [0001] The present invention relates to a transmission rod, in particular to a connection structure of a transmission rod provided on a work conveying device of a press machine. Background technique [0002] The continuous automatic press machine is a press machine of the type provided with a plurality of processing stations in the main body of the press machine, and the continuous automatic press machine is provided with a workpiece transfer device that sequentially transfers workpieces between the respective processing stations. The workpiece conveying device has a pair of transmission rods arranged parallel to the workpiece conveying direction, and each transmission rod is equipped with a detachable workpiece holder, which can be mounted corresponding to the mold provided on each processing table. Hold the workpiece or leave the workpiece. [0003] The molds described above need to be replaced according to the type of workpiece (type of product). The low...

AI Technical Summary

Problems solved by technology

[0010] However, the connecting structures disclosed in the above-mentioned Patent Documents 1 and 2 are structures in which the plate-shaped engaging member and the clamp provided on the residual rod swing up and down, and are engaged with the engaged part on the side of the moving rod from the vertical direction. Therefore, although the load in the vertical direction due to the own weight of the transmission rod itself or the acceleration when moving up and down can be sufficiently tolerated, there is a problem that the rigidity to the load in the horizontal direction is low.

Therefore, when the transmission rod is driven at a higher speed in order to improve the productivity of the press machine, not only a vertical load but also a horizontal load acts as a large bending moment on the joints of the rods. , thus creating the problem of not being able to resist this bending moment

In addition, when the device is enlarged in order to be able to resist the load from the horizontal direction, the weight increases, which becomes an obstacle to high-speed drive of the transmission rod.

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