Sliding unit with sealing means

摘要

A sliding unit having sealing means for closing gaps between a track rail and a dustproof cover. The sealing means is comprised of expansible sealing members that permit flanges for mounting an object on a sliding element to move through the sealing means. The flanges extend laterally through the gaps between the dustproof cover and side walls of the track rail. The expansible sealing members are arranged at the widthwise-opposing sides of the track rail so as to close the gaps around the flanges, resulting in keeping the sliding unit from the contamination of foreign bodies such as dust and dirt. The expansible sealing members face to the lateral extensions of the flanges in a sliding contact manner so as to help ensure the unobstructed movement of the flanges.