Device for antiskid falls to

The utility model discloses a device for antiskid falls to. The device is including companion ladder and brake circuit, the brake circuit includes a controllable silicon diode, establish ties between controllable silicon diode's positive pole and the negative pole a first diode and a d. C. Motor, establish ties between controllable silicon diode's negative pole and the controlled stage switch and a second diode, establish ties between controllable silicon diode's controlled stage and the negative pole switch and a resistance, said d. C. Motor lies in the companion ladder, moves together with the companion ladder the utility model discloses a brake circuit need not power supply can realize the brake, and through the d. C. Motor of making up at the companion ladder, when the companion ladder went up and down, the motor rotated thereupon, also had the effect of generator in the time of the revolution when the companion ladder has unusually quick landing, be big owing to what the voltage calibration of sending was often sent, trigger controllable silicon diode passageway, the both ends short circuit of motor forms the effect that the direct current was braked at this moment, and messenger's elevator slowly descends