An abrasion detector for a rapier band on a rapier loom.

摘要

In detection of abrasion on a rapier band (2) controlled in reciprocation by a rapier guide (3), the principal of detection is closely related to the critical abrasion ( alpha ) of the rapier band and the system calls for no substantial modification in construction of the rapier band in production. In the first invention, a longitudinal channel (32) of a depth greater then the critical abrasion is formed in the guide face (31) of the rapier guide so that an abrasion sensor (4) attached to the rapier guide detects the dimension of a non-abraded region on the rapier guide projecting into the channel. In the second invention, a photoelectric sensor (5a,5b) is attached to the rapier guide so that its detection beam passes through the rapier band at a distance of beta from the guide face, beta being equal to a sum of the critical abrasion ( alpha ) and the initial gap between the rapier band and the guide face of the rapier guide. The critical abrasion ( alpha ) of the rapier band can be easily and freely adjusted by end users only by changing the position of the sensor or sensors.