초록 ▼

An impact detection system for an industrial door, the system including two members that are releasably coupled to each other to move together with the door as it travels; disposed beyond the doorway opening is a radiation emitter and a radiation detector, preferably packaged together in a photoeye

An impact detection system for an industrial door, the system including two members that are releasably coupled to each other to move together with the door as it travels; disposed beyond the doorway opening is a radiation emitter and a radiation detector, preferably packaged together in a photoeye device, and emitting a beam of radiation; the first member carries a reflector that, when the two members are coupled, reflects the radiation back to the photoeye, and that is movable to a position wherein it does not reflect the radiation back to the photoeye in response to separation of the two members caused by the door being impacted, the change in state from 1) the radiation being reflected to the photoeye to 2) the radiation not being reflected to the photoeye thus serves as an indication that an impact on the door has occurred.

대표청구항 ▼

[ What is claimed is:] [1.] An impact detection system for use on an industrial door movable relative to a doorway between blocking and unblocking positions, the detection system comprising:a first member adapted to be disposed adjacent the door, and capable of movement therewith;a second member whi

[ What is claimed is:] [1.] An impact detection system for use on an industrial door movable relative to a doorway between blocking and unblocking positions, the detection system comprising:a first member adapted to be disposed adjacent the door, and capable of movement therewith;a second member which can be coupled to the door for travel therewith;a releasable coupling between the first member and the second member, the releasable coupling providing coupling of the first and second members such that they travel together with the door during unimpeded door operation, and providing separation of the first and second members for an impact on the door above a predetermined magnitude;a reflector coupled to the first member and movable from a first position to a second position in response to separation of the first member and the second member, anda radiation emitter which emits a radiation beam, and a radiation detector, which are disposable adjacent the doorway such that the radiation beam is reflected back to the detector with the reflector in one of the first and second positions, and such that the radiation beam is reflected away from the detector with the reflector in the other of said first and second positions.