| 摘要 |
This power operated I-beam turner has endless chain loops in which to cradle the beam carried in a plurality of coaxially spaced pulleys that are profiled circumferentially for meshing engagement with chains to enable transmitting drive thereto, all at the same speed in either direction for a beam turning operation. The pulley blocks can be hoisted and lowered relative to a roller conveyor system on which the beam is movable endwise when placed thereon by the chain loops, spaces being provided in this conveyor system in which the chains can operate when free of the beam. A pair of forked, spring operated spreader arms are provided on each pulley block pivoted at one end on the block and having chain guides in the other end slidably engaging both sides of the chain loop on the inner side to spread it enough when it is not cradling a beam so that it stays clear of the beam and won't interfere with its freedom of movement on the conveyor system while punching or other operations are being performed.
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