| abstract |
(57) [Problem] To provide a belt conveyor roller supporting device which can be visually recognized easily, has a simple structure, is inexpensive, and is easily attached when detecting an abnormal temperature. SOLUTION: Rollers 2 and 3 for guiding and supporting a belt are provided. The support shaft 5 is rotatably supported by a rolling bearing 7. A hole 10 is formed in the end of the support shaft 5 and a cup 12 with a bottom is fitted. In the cup 12, an indication member 1 which is movable in the axial direction is provided. 3 and a spring member 14 for projecting and urging the same. The pointing member 13 projects from the retaining ring 15 made of a shape memory alloy. Regulated by The retaining ring 15 is deformed by a temperature equal to or higher than a predetermined value and releases the restriction on the protrusion. |