| 摘要 |
A detector for an electromagnetic brake, for example used in an elevator system, that, by quantitative judgment, determines whether the brake force of the electromagnetic brake is appropriate. Load cells 19 for detecting the recovery forces of brake springs 13 are arranged between brake springs 13, which energize brake arms 10 with brake shoes 9 installed on them toward the side of brake wheel 8, and spring sheets 17, which hold brake springs 13 in a compressive deformed state, and, at the same time, judgment part 5c judges whether the brake force of electromagnetic brake 4 is outside a prescribed normal range based on the outputs of load cells 19. If the brake force of electromagnetic brake 4 is outside the normal range, judgment part 5c sends a signal, for example to a monitoring center 23. |
