| 摘要 |
PCT No. PCT/JP93/01402 Sec. 371 Date Mar. 30, 1995 Sec. 102(e) Date Mar. 30, 1995 PCT Filed Sep. 30, 1993 PCT Pub. No. WO94/08098 PCT Pub. Date Apr. 14, 1994A working tool unit of a construction machine, which excels in transportability and is capable of smoothly carrying out diversified types of work in a wide range, is disclosed. Therefore, the working tool unit according to the present invention includes: a first boom (31a) rockably mounted on a turning frame of a vehicle body; a second boom (3b) mounted to be rockable on the first boom; an arm (32) mounted to be rockable on the second boom; a working tool such as a bucket (33) mounted on said arm; a first boom cylinder (35) mounted on the turning frame (21) and the second boom to rock the second boom; a second boom cylinder (36) mounted on the second boom and the first boom to rock the second boom; and an arm cylinder (37) mounted on the second boom and the arm to rock the arm. The working tool unit is adapted to switch over its position from an attitude for storage to an attitude for working by rocking the first boom (31a) with extension and contraction of the first boom cylinder (35) and the second boom cylinder (36).
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