CEILING SEALING DEVICE FOR CRANE-HOISTING TYPE BLASTING MACHINE

摘要

PURPOSE:To close an opening part positively with ceiling shutters and slide shutters by providing the ceiling shutters respectively with slide shutters slided in the longitudinal direction of the opening part to close between both ceiling shutters as well as provided with the respective hook fitting recessed parts formed at the mutually opposed tip parts thereof. CONSTITUTION:A hook 4 for suspending a work in the opened state of an opening part 7 is carried into a work cabinet 2 through the opening part 7. Each ceiling shutter 12 is then moved onto the opening part 7 by a ceiling shutter drive unit 15 to close the required range of the opening part 7. Each slide shutter 16 is further slided in the relative direction by a slide shutter drive unit 18. The hook 4 is then clamped from both sides by the hook fitting recessed parts 20 formed at the opposed tip parts of the respective slide shutters 16 to close the opening part between both ceiling shutters 12.