Elevator position detecting device

Abstract

To provide an elevator position detector capable of detecting the position of an cage without requiring any long member. In the elevator position detector to output the position signal of a cage 2 elevating / lowering in a hoistway 1 to a terminating floor forcible deceleration means to forcibly stop the cage 2 brought close to a terminating floor, a photoelectric sensor PS to irradiate a plurality of optical axes is installed in the cage 2, a plurality of blocking plates S1-S6 having a plurality of cutouts formed therein are arranged at the predetermined position facing the photoelectric sensor PS along the elevating / lowering direction of the cage 2 while changing the shapes of the cutouts, and a detection means to detect the position of the cage by storing / determining the order of blocking the plurality of optical axes when the photoelectric sensor PS passes through the blocking plates S1-S6.

Description

technical field [0001] The invention relates to a position detection device of an elevator, which can detect whether an elevator car moving up and down in an elevator hoistway has approached an end floor. Background technique [0002] As the conventional technology of this kind of device, such as disclosed in Patent Document 1, multiple rows of paired light emitting devices and light receiving devices are arranged in the elevator car, and shielding plates are arranged at predetermined positions in the elevator passage, so that the The shielding plate passes between the light emitting device and the light receiving device, and the position of the elevator car is detected according to output signals when the shielding plate shields multiple pairs of the light emitting device and the light receiving device. [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2000-34070 (paragraph numbers 0011 to 0013) [0004] However, in the conventional elevator position d...

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional elevator position detection device, since a shielding plate with a predetermined length is arranged in the hoistway, it is detected that when the emitted light sent from the light-emitting device to the light-receiving device is blocked by the shielding plate for a predetermined time or longer. Therefore, when the lift speed of the elevator car is accelerated, in order to keep the time during which the emitted light is blocked by the shielding plate above the specified time, the length of the shielding plate must be increased.

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