Lobster Tool Co., Ltd.

Adolf Wuerth Gmbh & Co. Kg

Akira Kamata

Yasuo Umemura

Masaru Mori

Hirohumi Tsuyuguchi

Yoshiyuki Kubo

The riveter of the invention comprises a shaft, a rolling nut, a jaw mechanism, a head frame, a rotary drive shaft, a clutch mechanism disengageably coupling the rolling nut with the rotary drive shaft, a generally cylindrical journal frame and a cylindrical main frame. After a blind rivet having a drill point is inserted into a nose piece of this riveter, the main frame and rotary drive shaft are rotated in a suitable manner, whereby the desired drilling of the rivet hole and riveting operation can be accomplished. The riveter may alternatively comprise a shaft, a rolling nut, a jaw mechanism, a head frame, a rotary drive shaft, a rear clutch mechanism disengageably coupling the rolling nut with the rotary drive shaft, a generally cylindrical journal frame, a cylindrical main frame, a front cover, a rear cover and a forward clutch mechanism.

Riveter

The present invention relates to improvements in a hydropneumatic gun for setting blind-rivet nuts used for integrally securing, for example, two panels to each other with a nut. In the hydropneumatic gun for setting blind-rivet nuts, an air piston fitted in air cylinder is moved to pressurize oil housed in the gun body, causing an oil piston to be retracted, so that a screw mandrel attached to the oil piston at its tip is retracted to the inner part of the gun body, thereby to exert a deforming force to a sleeve of a nut threadedly mounted on the screw mandrel. The hydropneumatic gun for setting blind-rivet nuts comprises an air motor to be rotated by compressed air, an air motor driving air guide passage, an air motor forward/reverse rotation direction changeover mechanism for switching the rotation direction of the air motor, and a power transmission mechanism for transmitting an air motor driving force to the screw mandrel. According to the present invention, a series of operations of the screw mandrel such as forward rotation, stop of the rotation, retraction, reverse rotation and advancement can be carried out smoothly and sequentially.

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Nara, Japan

Akira Kamata