Aida Engineering, Ltd.

Aida Engeneering Co., Ltd.

Masayoshi Sugawara

Yuichi Nakamura

Akira Matsui

Masakatsu Shiga

Hideaki Bando

A threaded member projecting from a press slide includes a projection on its upper end. A motor raises and lowers the threaded member in tandem with a slide adjustment mechanism. A plate disposed on a lower surface of a press crown is moved to slidably enclose the projection. The press slide is locked when the lower surface of the projection and the upper surface of the plate abut each other.

Slide locking mechanism

A crankshaft mechanism for use with a press having a slide member which comprises an eccentric crankshaft having first and second cylindrical portions. The first portion is rotatable within a housing about a longitudinal axis and the second portion, of greater diameter than the first portion, has a center which is displaced radially from the longitudinal axis. An eccentric sheave is rotatably mounted on the outer circumference of the second portion of the crankshaft, and a connecting member is rotatably mounted on the outer circumference of the sheave. The second portion of the crankshaft, sheave and connecting member are provided with first, second and third radial bores respectively which are in alignment when the crankshaft is at its bottom dead center position. A locking pin slides within the radial bores and is displaceable by an actuator to a first position in which the crankshaft is connected to the sheave and a second position in which the sheave is connected to the connecting member. In the first position, the connecting member is free for movement with respect to the sheave and in the second position the sheave is free for movement with respect to the crankshaft. In addition, an auxiliary stop position correcting device is provided for stopping the slide member at a predetermined position.

Crankshaft mechanism having a variable stroke and a press employing said

A drive device for a press wherein a drive device assembly provided with a quick-return mechanism capable of changing its speed characteristic in different degrees is built in a unitary case, each unit case being freely attachable and detachable at the crown center of the press, an output shaft of the drive device has its end portions projecting outwardly from both sides of the unit case and is coupled with a main crankshaft at its end portions through couplings, a main gear located in the unit case is divided into two parts to form a hollow section therebetween, and a link drive an balance weight for the linkage are built in the hollow section.

Drive device for press

A balancing device for a press slide arranged in a vacant space of the press frame has an eccentric ring portion 180.degree. out of phase with an eccentric portion of the crank shaft attached to an end of the crank shaft and, a balancing weight slidable on guide posts and reciprocated vertically through a slide-block mounted in the eccentric ring.

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Sagamihara, Japan

Masayoshi Sugawara