| 摘要 |
CORE HANDLING APPARATUS A core handling apparatus includes an upright, tubular frame adapted for being suspended from an overhead hoist. A pair of upright air cylinders are fixed to opposite sides of the frame and each includes a reciprocable rod. Upper and lower shafts are respectively rotatably mounted in upper and lower end portions of the frame. A first length of roller chain is engaged with a first sprocket mounted on the upper shaft and has its opposite ends coupled to the respective upper ends of the piston rods of the pair of cylinders while a second length of roller chain is engaged with a second sprocket mounted on the lower shaft and has its opposite ends coupled to the respective lower ends of the piston rods. A mandrel plate is fixed for rotation with the lower shaft and is adapted for having various core handling attachments releasably secured thereto. A stop mechanism stop plate is fixed for rotation with the upper shaft and a stop pin is selectively insertable through upper and lower tubular receptacles provided in the upper end portion of the frame so as to respectively cooperate with first and second pairs of adjustable abutment surfaces of the stop plate so as to limit to amount of rotation of the upper shaft respectively to about 90.degree. and 180.degree. and hence to similarly limit the range of rotation of the lower shaft and mandrel plate, whereby an operator controlling reciprocation of the air cylinders will be aided by the stop structure in effecting precise positioning of a core handling attachment relative to or together with a core to be or being handled.
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