| 摘要 |
PCT No. PCT/EP82/00178 Sec. 371 Date May 20, 1983 Sec. 102(e) Date May 20, 1983 PCT Filed Aug. 23, 1982 PCT Pub. No. WO83/01057 PCT Pub. Date Mar. 31, 1983.A belt conveyor has a luffing boom (5) and a supporting leg (10) turningly joined with a free end of the boom. The single conveyor belt (15) of the belt conveyor is guided between the boom (5) and the supporting leg (10) by way of a bend unit (24), that has a so-called curved rolling guide (41). This rolling guide (41) is made up of a rigid part-circular guide (42) joined with the boom (5) and a chain-like curved part (43) dependent from the guide (42), the curved part (43) changing into a curved form on upward luffing of the boom (5) because of the wedge-like form of its chain links (43) or because of a curved rail (55) fixed to the top end of the supporting leg (10), whereas on downward luffing of the boom (5) it takes on a straight, freely hanging form so that it is taken up in the supporting leg (10) and for this reason takes up only a little space between the two runs (28 and 29) of the conveyor belt (15). |
