To prevent a collector ring separated from a trolley line from colliding with a bracket or the like in a hoistway as well as to make an error to be produced thereby so as to be detectable at once by installing such a means as detecting a fact that this collector ring of a trolley set up in a car has separated from the trolley line.
Usually, two collector rings 2a and 2b slide along a trolley line 1, but in the case where the collector ring 2a has separated from the trolley line 1, by way of example, due to the effect of vibrations by an earthquake, a state of the trolley line 1, and a running state, etc., such a force as being forcibly pressed to the side of the trolley line 1 is given to the collector ring 2a, so that its tip has been tilted up to a position where it passes through the trolley line 1 and hits on a bracket 7, but it strikes against a stopper 4a and able to stop short of it. At this time, a microswitch 3a attached to the collector ring 2a hits on the stopper 4a and thereby it operates, taking into a communicating microcomputer through a detector, and thus communication to a control panel and abnormality can be detected.
YAHIRO SEINOSUKE
YOSHIOKA TSUTOMU
KUBO MASAHITO
