| 摘要 |
PURPOSE:To make miniaturization in a tension unit and its maintenance ever so easy, by attaching a pulley, having a pulley revolving speed transmission mechanism and a revolving speed generator built-in, to a conveyor belt, while constituting it so as to control its tension with output of the generator, in case of the tension unit for the conveyor belt. CONSTITUTION:A tension unit 11 is attached to a return passage of a conveyor belt, and a revolving speed of a pulley 12 with rotation of the conveyor belt is taken out by a revolving speed transmission mechanism 18, a revolving speed generator 30 and a cord 31 and inputted into an arithmetic unit (unillustrated herein). With this revolving speed, the arithmetic unit finds a traveling speed of the belt conveyor, and calculates a conveying quantity together with a measuring signal being inputted separately, thus tension control takes place. With this constitution, a setup space is reduced and, what is more, maintenance is performable in an easy manner. |
