Toyota Jidosha Kabushiki Kaisha

Tsubakimoto Chain Company

Osg Mfg. Company

Yasuhide Nakamura

Toshimitsu Sakai

Hiroki Ishida

Shinobu Kaneko

Minoru Haga

Masashi Nakamura

Kimimasa Murayama

Shoji Ikawa

Syunji Sakura

Mitsuo Saito

Shinji Hishioka

A storage conveyor that secures a number of stored workpieces while saving space is provided. When a sprocket on a driving side is driven to rotate in a forward/reverse direction by a chain drive motor, opposing bend suppression members between a pair of chains are successively engaged/disengaged, and an opposing portion between the pair of chains is extended/retracted with respect to a workpiece conveyance surface. Thus, workpieces are passed between the workpiece conveyance surface and workpiece receivers. Consequently, the workpieces can be stored in a vertical direction (up-down direction), making it possible to secure the number of stored workpieces while saving space.

Storage conveyor

Serration rolling tools and thread rolling tools each having groups of leading teeth, finishing teeth and disengaging teeth are provided, a lead angle of the thread rolling tool being set in accordance with the rolling diameter of the serration section in a work piece. The thread rolling tool and serration rolling tool are arranged parallel and integrally. First a rolling operation for forming serrations is started by the serration rolling tools, a rolling operation for forming threads being started by the thread rolling tools in the course of the rolling operation by the group of the leading teeth of the serration rolling tools. A rolling operation for finishing the threads is completed in the latter half of the rolling operation by the group of the finishing teeth for the serrations. The difference in rolling diameters is absorbed by the slide of the aforesaid thread rolling tools on a shaft member (work piece), thus enabling the simultaneous formation of serrations and threads in a short rolling stroke.

Rolling method and rolling tools

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Toyota, Japan

Yasuhide Nakamura