| 摘要 |
POSITIONING APPARATUS FOR SUPPORTING AND GUIDING A TOOL A positioning apparatus for supporting and guiding a tool to effectuate a work function on a predetermined area of a stationary surface. The apparatus comprises a support guide frame which is displaceably connected to a displaceable base. The base is displaceable and positioned to a stationary location relative to the predetermined area. The support guide frame has a pair of spaced-apart side arms each connected at a rear end thereof to the base by a respective pivotal telescopic coupling. The telescopic coupling permits each side arm to be independently displaced axially and pivotally to one another in parallel vertical planes. A transverse guide beam is secured to the side arms and is axially displaceable relative thereto. A tool carriage is secured to the guide beam and controllably displaced therealong. The carriage has a telescopic support member axially displaceable in a vertically pivotal bushing. A tool is attached to the support member and is operable by manual controls by an operator for initial positioning to the surface to be worked. The maintenance task proceeds by automatic control from thereon.
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