| 摘要 |
PROBLEM TO BE SOLVED: To provide a pinch for efficiently performing tearing-off and pushing-in work by picking an object by using a wrist part and a claw in common by exchanging the claw, in a work attachment of a power shovel. SOLUTION: This knob device has a pair of synchronously opening-closing fingers 1a and 1b having on the tip, pinch plates 8a and 8b abutting on a surface in closing. A hand body 2 is incorporated with a hydraulic cylinder 6 for opening and closing the fingers 1a and 1b, and also has a connecting link 18 for synchronously opening and closing the upper-lower fingers 1a and 1b. A rocking or rotary device 3 for rotating the hand body 2 around a shaft of the wrist part, is arranged in the wrist part 20 between the hand body 2 and an installation bracket 5 installed on the arm tip of the power shovel. Non slip projection strips 19 in the parallel direction to a fulcrum pin of the fingers 1a and 1b are alternately arranged in a plurality of strips on an abutting surface of the knob plate 8. COPYRIGHT: (C)2007,JPO&INPIT
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