PURPOSE: To prevent damage to a hose and achieve efficient hose exchange work by suppressing the deformation of the hose due to turn of a front bucket and remote-supplying lubricating oil to a pin joint section of an open and close cylinder and the front bucket.
CONSTITUTION: When a pin joint section 20 moves due to turn of a front bucket 1, one end of a hose 8 which leads lubricating oil is fixed on a rear bucket 3 At this time, only the other end of the hose 8 moves integrally with a relay member 10 fixed on the front bucket 1 in the interlocking relationship with the turn of the front bucket 1, and the length of the hose 8 is set to the minimum length. A relay member 10 fixed on a side of the front bucket 1 is provided. It has an oil passage 10a for distributing lubricating oil, and the other end is set to the dimension of non-projection shape in the direction of side of the rear bucket 3. Consequently, the durability of the hose 8 is improved, and it is possible to supply lubricating oil to the pin joint section 20 stably for a long period of time.
WATANABE TOMONORI
ONO TOSHIHIRO
TAKAHASHI YUTAKA
HASHIMOTO AKIRA
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