| 摘要 |
PROBLEM TO BE SOLVED: To realize the reduction of weight and manufacturing costs of a mast. SOLUTION: A pair of right/left pivot bodies are provided to the upper part of the mast. The respective base end parts of a bucket cylinder, a support arm, and a lift cylinder are respectively pivotally supported between both pivot bodies. And at the same time, the respective base end parts are made closer and concentratedly arranged. In this way, the respective base end parts of the bucket cylinder, the support arm, and the lift cylinder are respectively pivotally supported between a pair of the right/left pivot bodies provided to the upper part of the mast. And at the same time, the respective base end parts are made closer and concentratedly arranged. As a result, a pair of the right/left pivot bodies can be formed compactly. Thus, the reduction of the weight and the manufacturing costs of the mast can be realized. COPYRIGHT: (C)2005,JPO&NCIPI
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