| 摘要 |
PCT No. PCT/JP89/00036 Sec. 371 Date Sep. 14, 1989 Sec. 102(e) Date Sep. 14, 1989 PCT Filed Jan. 18, 1989 PCT Pub. No. WO89/06723 PCT Pub. Date Jul. 27, 1989.A loading/unloading vehicle having booms and a bucket carried thereon such as a shovel loader, a wheel loader or the like vehicle detects that a true bucket-to-ground angle coincides with a preset angle after the vehicle starts automatic turning movement of the bucket. When the coincidence is detected, the automatic turning movement of the bucket is interrupted. Thereafter, a differential value between the true bucket-to-ground angle and the preset angle is determined, if any and then the bucket angle is corrected so as to allow the differential value to be reduced to zero. Consequently, the bucket is held at the preset angle after the bucket stops, even though the booms continue to be turned.
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