PURPOSE: To perform an unloading work from a hold efficiently by freely extending or contracting an arm suspended with a bucket chain by means of a drive cylinder in an unloader unloading a bulk material from the hold of a freight ship.
CONSTITUTION: A rotary stand 21 is rotatably fitted to the tip of a boom 5 tiltably fitted to a rotary dolly 3, and a frame 7 equipped with a bucket elevator 8a is fixed to the rotary stand 21. A bucket chain 9 is arranged to surround between sprocket wheels 11, 10 provided at the tip of a bulk material unloading arm 13 fitted to the lower end of the frame 7 and provided at the upper end of the frame 7. The extendable/contractable arm 13 is somewhat tilted by an action of a drive cylinder 14 and is horizontally extended to a maximum for an unloading work when unloading a bulk material in a hold of a large ship, and the arm 13 is contracted by an action of an extending/contracting cylinder 15 to a proper length and is tilted or rotated when unloading in a hold of a small ship, thereby the unloading work of the bulk material can be performed efficiently.
TAKEYA KUNIO
MURATA JIYUNROU
KITAHARA KOUICHI
