| 摘要 |
Material introduced into hopper (1) is compressed by two sets of fingers (3) staggered in length, to form a bale in a chamber beneath hopper (1). For safety the baler includes passive infrared (PIR) detector (14) having shield (15) so that it receives radiation from hopper (1) only. Introduced material will have no effect, as detector (14) requires both the heat and motion of a worker's body part for activation. On downward movement, fingers (3) are locked in an extended orientation so as to compress material whereas on upward movement they are free to pivot, retracting from the sides of hopper (1). Valving in hydraulic resistance struts (11) assists this pivoting of fingers (3). |
