| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized load detector having high load precision. SOLUTION: This load detector 70 is provided with a horizontal load detector 71 and a vertical load detector 81, and these detectors have the same structure. The horizontal load detector 71 is provided with a hydraulic cylinder 72, a horizontal pressure switch 73, a horizontal slide rail 55, a horizontal buzzer 74, and a power supply 75. The hydraulic cylinder 72 is provided with a cylinder tube 76 and a piston 77. The hydraulic cylinder 72 is fitted to an upper bracket 53, with a rod side end section faced to the left side, and a hydraulic fluid is filled in the hydraulic chamber of the hydraulic cylinder 72. The rod side end section of the piston 77 is protruded from the left side end section of a top plate 53a. The horizontal pressure switch 73 is communicated with the hydraulic chamber of the hydraulic cylinder 72, and the horizontal pressure switch 73 is electrically connected to the horizontal buzzer 74 provided in a lower bracket 51. The horizontal buzzer 74 incorporates a switch, which is closed to ring the horizontal buzzer 74 when receiving an electric signal from a horizontal pressure switch 73.
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