Thin finite linear motion rolling guide unit with apparatus for

Abstract

There is provided a thin finite linear motion rolling guide unit having an apparatus for preventing a positional deviation of a holder. The guide unit comprises a U-shaped bed member, an inverse U-shaped table member, and a M-shaped holder sandwiched between the bed member and the table member. Holding holes are formed horizontally in a line at regular intervals in a pair of outside opposite walls so as to rotatably hold the balls between the opposite track grooves formed on the bed member and the table member. Circular holes are formed in the central portions in the lognitudinal direction of the inside opposite walls of the holder. A pin is pressure inserted and fixed into the holes. A single type inside belt and a double-single type outside belt are wrapped to the central portion of the pin by a half rotation in the opposite directions so that the outside belt comes into contact with outer edges of the inside belt. Both belts are extended horizontally in the opposite directions along the upper and lower surfaces of flat plate-shaped coupling portions. Upper and lower sides of both belts are coupled and fixed to coupling portions on the tables and bed sides, repectively. Thus, the motion of the holder can be restricted to 1/2 of the rolling guide unit. In place of the belts, wire ropes can be also wrapped around a pulley with double V-shaped guide grooves attached to a rotary shaft.