| 摘要 |
PROBLEM TO BE SOLVED: To provide a bottom-enlarged bucket facilitating calibration work for associating the opening of a bottom-enlarged blade opened/closed by the expanding/contracting operation of a hydraulic cylinder, with the flow of an operating fluid supplied to the hydraulic cylinder. SOLUTION: The bottom-enlarged bucket includes a thruster 50 lifted and moved relative to a frame body 30, and the bottom-enlarged blade 60 enlarged and reduced in diameter by the lifting movement of the thruster 50. A gauge 80 with a dial 82 stuck thereto and with projections 83 projected is mounted to the frame body 30, and a scale bar 58 indicating the dial 82 and the projections 83 is mounted to the thruster 50. Measurement of the enlarged diameter of the bottom-enlarged blade 60 can thereby be substituted with measurement of the relative position of the thruster 50 to the frame body 30. As a result, the direct measurement of the enlarged diameter of the bottom-enlarged blade 60 is thereby dispensed with to facilitate calibration work of associating the opening of the bottom-enlarged blade opened/closed by the expanding/contracting operation of the hydraulic cylinder, with the flow of the operating fluid supplied to the hydraulic cylinder. COPYRIGHT: (C)2010,JPO&INPIT
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