| 摘要 |
PURPOSE: A sliding type extension plate apparatus is provided to extend working space, to prevent a workpiece from being damaged by mounting a main plate with a sliding type extension plate, to utilize a space efficiently by controlling the size of expansion space in several steps by using fixing tap and fixing groove . CONSTITUTION: A sliding type extension plate apparatus is composed of a plurality of ball bush bearings(100) installed at the lower part of a main plate(1), a plurality of cylindrical guide bars(200) inserted slidably into the ball bush bearings, a support frame(300) coupled to one end of each cylindrical guide bar and supporting the cylindrical guide bars, and an extension plate(500). A stopper(210) is formed at the other end of the guide bar, and prevents the guide bar from being separated from the ball bush bearing. One end of the extension plate is in contact with the top of the main plate. The other end of the extension plate is attached to the upper part of the support frame by a plurality of hinges(510) to lift up one end of the extension plate. A fixing frame(400) is installed at the lower part of the main plate, and firmly fixes the ball bush bearings to the lower part of the main plate.
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