| 摘要 |
<p>Festoon apparatus (16) having upper (28) and lower (34) sheave assemblies mounted for vertical movement upon a support column (40) for supply and withdrawal of tire bead material. The upper sheave assembly (28) is supported near the top of the support column by a selectively releasable latch mechanism (52) during normal operation of the festoon apparatus. The lower sheave assembly (34) moves upwardly on the support column (40) during periods when bead material is withdrawn from the festoon faster than it is supplied, and downwardly when the material is supplied faster than it is withdrawn. The lower sheave assembly (34) is connected to a cable (60) which passes through a pneumatic cylinder (56). The upper sheave assembly (28) may be lowered by releasing the latch mechanism (52) and lowering the lower sheave assembly (34) with the upper sheave assembly (28) supported thereon. Both sheave assemblies are then accessible for threading of bead material thereon by an operator standing at floor level.</p> |
