Motion limiting device for portal crane

The utility model discloses a motion limiting device for a portal crane, which comprises a plurality of photoelectric switches (2) which comprise light projectors with functions of transmitting and receiving infrared. The photoelectric switches are respectively arranged at the ends of an operation p...

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Bibliographic Details
Main Authors ZHANG YIJUN, QI MINGHUA, ZHU JIANJUN, GAO FENG
Format Patent
LanguageChinese
English
Published 03.08.2011
Subjects
CRANES
HAULING
HOISTING
LIFTING
LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES
PERFORMING OPERATIONS
TRANSPORTING
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Summary:The utility model discloses a motion limiting device for a portal crane, which comprises a plurality of photoelectric switches (2) which comprise light projectors with functions of transmitting and receiving infrared. The photoelectric switches are respectively arranged at the ends of an operation part (1) on track of the portal crane and each end is provided with at least two photoelectric switches. Each end of the operation part (1) is provided with at least one light projector of the photoelectric switches (2). The light projecting direction is the same as the operation direction of the operation part (1). The motion limiting device for a portal crane has a high reliability and a long service life, can not knock servicemen and objects on track and occupy no track spaces.
Bibliography:Application Number: CN201020695786U