Linear motion mechanism side seal unit and linear motion mechanism

A linear motion mechanism, comprising:

• a slider that is configured to linearly reciprocate along an axis of a shaft, said slider including a plurality of rolling bodies arranged to roll axially along the shaft,
• a pair of linear motion mechanism side seal units for sealing gaps along the shaft at a front end portion and a back end portion of the slider which carries out reciprocating linear motion on the shaft,
• each of the linear motion mechanism side seal units including:
• an outer casing material having a bent portion;
• a seal member having a fibrous surface with a shape which follows the bent portion of the outer casing material;
• wherein said fibrous surface of said seal member comprising fibrous material arranged so as to be directed toward the shaft in a manner to abut and conform to a cross-sectional shape of the shaft at the front end portion and the back end portion of the slider;
• and
• said fibrous material including a cut pile fabric having cut loops of pile fibers raised from a ground yarn portion which is secured to an inner surface of a base, wherein tips of said cut loops of pile fibers spread out in a radial fashion towards ends of the tips such as to facilitate retention of lubricant and to eliminate gaps.