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    • 8. 发明专利
    • HOISTING APPARATUS MANAGING SYSTEM FOR CONSTRUCTION
    • JPS6446184A
    • 1989-02-20
    • JP20328987
    • 1987-08-15
    • TAKENAKA KOMUTEN CO
    • IMAI TAKAYOSHIKIKUCHI KIMIOSHIBATA YASUSHIYAMASHITA SUSUMU
    • B66B5/00E04G21/14G07C3/02
    • PURPOSE: To easily and accurately manage the operating state of a construction crane by providing the management device with a constructor identifying means, an operating time measuring means and an operating time calculating means. CONSTITUTION: A memory 8 and a CPU 9 are built in an operation control box 6 in a construction field. When a constructor's ID card 13 is inserted into a card reader 7, the drive of a crane is permitted and identified constructor's data are outputted. ACPU 9 inputs operating time(t) counted by a timer 17 to the operating time calculating means 10, stores the time(t) in the memory 8 and inputs and stores the number(n) of operations counted by a counter 18 to/in an operation frequency calculating means 11. These stored values are updating in each operation stage. When the card 13 is pulled out from the reader 7, the inputted and stored operating time t' is added to operating time T read out from the memory 8, the added value is substituted for the stored time T and the added value is stored in the memory 8 as new operating time T. New operation frequency N also is similarly stored. An average operating time calculating means 12 calculates and stores T/N.