A Study on the spread details of self-propelled carriages and its operation system in Japan.

Abstract

Recently, high performance forestry machines have come into very wide use in Japan. These forestry machines are wheeled typed base machines except a tower-yarder. On the other side, looking at cable-typed forestry machines, the number of cable yarding systems is decreasing while those of the tower-yarders and self-propelled carriage systems are increasing. About eighteen hundred self-propelled carriage systems are used in Japan for 1995. In this paper we discussed on the trends of these forestry machines and on the spread trends and operation system of the self-propelled carriage system. This machine has been used from the area of Kyushu since 1983, and spread to the Gifu-Prefecture and Shizuoka-Prefecture and then to Iwate-Prefecture. We studied for the case of Tenryu District. It results that we can expect the average yarding productivity is 18.5〜35.7m^3 per set.