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    • 4. 发明专利
    • CRANE
    • JP2000191285A
    • 2000-07-11
    • JP24487899
    • 1999-08-31
    • PALFINGER AG
    • WIMMER ERIC
    • B66C13/20B66C1/00B66C13/18B66C23/82E02F9/22F15B11/028
    • PROBLEM TO BE SOLVED: To quickly operate dynamic overload preventing devices at the same time by reducing change of the detected pressure or change of load in response to the detected pressure of a cylinder or a load change of a piston with the lapse of time, and forming the signal for operating a valve cross sectional area adjusting device. SOLUTION: A wind-up cylinder is controlled through a remote control device formed of a transmitter 9 and a receiver 10. The signal sent from the transmitter 9 is transferred to a slide valve 12 having a capacity adjusting device through the receiver 10. Operating oil from a pressure-oil pipe 13 is pressure-fed from the valve 12 to a piston side 3a or a rod side 3b of the wind-up cylinder. The piston side 3a is provided with a load holding valve 11. The wind-up force is computed on the basis of the measured pressure values of the piston side 3a and the rod side 3b, and transferred to a differential unit 8. The differential unit 8 aims at the reduction of change of the detected pressure, and outputs the output signal for operating a driving device for adjusting the valve cross sectional area.
    • 8. 发明专利
    • ATTACHMENT WITH POWER UNIT FOR CRANE
    • JPH10129975A
    • 1998-05-19
    • JP30356496
    • 1996-10-30
    • KOMATSU MFG CO LTDYAMAKAWA ENG
    • OTA SHINICHIMIZUTANI SHUICHIMATSUMOTO RYOZO
    • B66C1/00B66C1/42B66C3/02
    • PROBLEM TO BE SOLVED: To reduce the man-hour for changing an attachment to improve the working capacity, by changeably suspending the attachment from a lower part of a power unit suspended from a point of a wire of a crane, through a connecting means. SOLUTION: A power unit 10 comprises a stem 12 comprising a hoisting accessory 11 fixed to a point thereof, an engine 14 installed inside of a case 13, and a power unit apparatus such as a hydraulic pump 15 or the like. A rotating means 18 comprising a stewing motor 18b on an upper part, is connected with a shaft part 12a of a lower end of the stem 12. The carrying operation of the loose material such as sediment can be performed by an opening and crossing operation of, for example, a clam basket 21, and the clam basket 21 can be opened and closed in the desired direction by rotating the rotating means 18 by driving the slewing motor 18b, when the control of the opening and closing direction is necessary. When the other attachment is changed for the clam basket 21, the clam basket 21 is lowered to the ground, a connecting pin 22 is drawn out to be removed, and the other attachment is mounted on the power unit 10.