| 摘要 |
PROBLEM TO BE SOLVED: To provide a drum controller which does not obstruct the rotation driving operation of a drum even if used disorderly. SOLUTION: The drum controller C comprises a dial 2 rotatably attached to a case 1; and a potentiometer 3 stored in the case 1 and coupled to the dial 2, and outputting a signal corresponding to a dial rotating position to a control device drive-controlling the drum of a concrete mixer truck. The dial 2 has a dial shaft 23 equipped with a flange 24 at one end, and a bowl-shape operating head 25 coupled to the other end of the dial shaft 23. The case 1 is equipped with a cylinder portion 7 rotatably supporting the outer periphery of the dial shaft 23, and clipped between the flange 24 of the dial shaft 23 and the inner periphery of the operating head 25. A detecting shaft 3b rotatably projecting out from a potentiometer main body 3a is loosely fitted with a fitting hole 23a provided at one end of the dial shaft 23. COPYRIGHT: (C)2009,JPO&INPIT
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