Tsubakimoto Chain Company

Sinko Kogyo, Co, Ltd.

Hideyuki Sato

Masato Tomobuchi

Shoichiro Shimizu

Masaru Kanamori

Tomohiro Kita

A toothed belt is provided that has excellent environment resistance, high load resistance, high stiffness, and achieves high accuracy, light weight, compactness and low noise. A toothed belt is provided with a belt body including a plurality of core wires juxtaposed in the width direction of a rubber portion, a plurality of tooth rubber portions formed on one surface of the belt body, and a tooth cloth covering the surface of the tooth rubber portions. The rubber portion contains dioctyl sebacate and trimellitic acid ester in a mass part ratio of 1:19 to 1:1, the mass percentage of the dioctyl sebacate to the whole quantity of the rubber portion is less than 4 mass %, and the mass percentage of the total quantity of the dioctyl sebacate and the trimellitic acid ester to the whole quantity of the rubber portion is in a range from 4 mass % to 8 mass %.

Toothed belt

An outer frame (71) is formed by orderly connecting four connecting blocks (74) arranged at predetermined intervals with four beam members (75). The connecting block (74) is made of heat insulating synthetic resin as well as the beam member (75). A lower cover (73) is fitted in a lower surface of the outer frame (71) and an upper cover (72) is fitted in an upper surface of the outer frame (71). Foamable synthetic resin is charged into a panel space (P) enclosed by the outer frame (71) and both the covers (72), (73) from a filling port (84).

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Osaka, Japan

Hideyuki Sato