US 11,853,037 B2
Electric hoisting machine and control device and control method therefor
Hiromu Yasuda, Tokyo (JP)
Assigned to GLOBERIDE, INC., Tokyo (JP)
Appl. No. 16/605,544
Filed by Globeride, Inc., Tokyo (JP)
PCT Filed Apr. 16, 2018, PCT No. PCT/JP2018/015719
§ 371(c)(1), (2) Date Jan. 20, 2020,
PCT Pub. No. WO2018/194026, PCT Pub. Date Oct. 25, 2018.
Claims priority of application No. 2017-081553 (JP), filed on Apr. 17, 2017; application No. 2017-082336 (JP), filed on Apr. 18, 2017; application No. 2017-113783 (JP), filed on Jun. 8, 2017; application No. 2017-113784 (JP), filed on Jun. 8, 2017; application No. 2017-113785 (JP), filed on Jun. 8, 2017; application No. 2017-125847 (JP), filed on Jun. 28, 2017; application No. 2017-135837 (JP), filed on Jul. 12, 2017; application No. 2017-135838 (JP), filed on Jul. 12, 2017; application No. 2017-138990 (JP), filed on Jul. 18, 2017; and application No. 2017-176584 (JP), filed on Sep. 14, 2017.
Prior Publication US 2020/0140245 A1, May 7, 2020
Int. Cl. B66D 1/22 (2006.01); G05B 19/416 (2006.01); B64C 39/02 (2023.01); B64D 1/22 (2006.01); B66D 1/50 (2006.01); B66C 13/22 (2006.01); B66C 23/20 (2006.01); B64U 101/60 (2023.01)
CPC G05B 19/416 (2013.01) [B64C 39/024 (2013.01); B64D 1/22 (2013.01); B66D 1/505 (2013.01); B64U 2101/60 (2023.01); B66C 13/22 (2013.01); B66C 23/202 (2013.01); G05B 2219/41318 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A control device configured to control an electric hoisting machine configured to wind and/or unwind a traction member on or from a rotating body by rotating the rotating body forward and backward by way of the forward and backward rotation drive of an electric motor, the control device comprising:
a tension detection part configured to detect a tension of the traction member;
an input part configured to input a mode switching signal to switch between a winding mode to rotate the rotating body forward to wind the traction member on the rotating body and a unwinding mode to rotate the rotating body backward to unwind the traction member from the rotating body; and
a control unit configured to receive a detection signal from the tension detection part and a mode switching signal from the input part and control the operation of the electric motor in response to the mode switching signal,
wherein the control unit is configured to control the electric motor in response to a detection signal from the tension detection part so that when set to the unwinding mode by the mode switching signal,
the rotating body is rotated backward when the tension of the traction member is equal to or greater than a predetermined threshold value, and
the rotating body is prevented from being rotated backward when the tension of the traction member falls below the predetermined threshold value,
wherein the control unit is configured to limit a speed of the backward rotation of the rotating body to a predetermined speed or less in the unwinding mode.