Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1980-04-22
1982-07-06
Rubinson, Gene Z.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 144
Patent
active
043378463
ABSTRACT:
An elevator relevelling control apparatus for controlling the movement of an elevator car (11) such that when the car is misaligned with the landing position of a selected landing floor, the car is restarted and brought into alignment. A traction motor (M) is controlled by a landing means (1) which generates a speed command signal (1a) of a magnitude which increases linearly with the extent of misalignment. First and second position detecting devices (15, 16, 17, 18) are provided in the hoistway to detect misalignment from the landing position by a first or second predetermined distance, respectively. The car is provided with load detecting means (12) for detecting whether or not the car is overloaded. If the load detecting means (12) detects that the car is not overloaded, and a switching device (15, 16) detects that the car is misaligned by a first predetermined distance, a speed command signal (1a) of suitable magnitude is supplied to the traction motor (M), thereby effecting relevelling. If, on the other hand, the car is detected to be in an overloaded state, and a switching device (17, 18) detects that the car is misaligned by a second, greater, predetermined distance, a speed command signal of larger magnitude is supplied to the traction motor (M), whereby the relevelling operation can be commenced with a torque greater than that applied when the car is not overloaded.
REFERENCES:
patent: 2847091 (1958-08-01), Santini et al.
patent: 3587785 (1971-06-01), Krauer et al.
patent: 3741348 (1973-06-01), Caputo
patent: 4071116 (1978-01-01), Halperin et al.
patent: 4094385 (1978-06-01), Maeda et al.
patent: 4114731 (1978-09-01), Faup et al.
Watanabe Eiki
Yonemoto Masashi
Duncanson Jr. W. E.
Mitsubishi Denki & Kabushiki Kaisha
Rubinson Gene Z.
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