Dust preventing structure of guide unit

A guide unit comprising:

• a track shaft having a rolling groove of a rolling body,
• a sliding member engaged with the track shaft via the rolling body and moved relative to the track shaft,
• a pair of end seals mounted to both ends in a traveling direction of the sliding member, having a seal lip portion being in firm contact with a surface of the track shaft, and
• a pair of dust preventing members mounted to both ends in the traveling direction of the sliding member and being on an outer side of the end seals, for removing foreign matters adhering to the track shaft forwardly to the end seal,
• wherein the dust preventing member comprises elastic members, each elastic member being made of a continuously foamed body for holding lubricant, in firm contact with a surface of said track shaft, said elastic members are overlaid in a longitudinal direction of said track shaft, and a spacer member interposed between the elastic members, wherein the spacer member is not in contact with the surface of the track shaft, and
• wherein each elastic member is plate shaped and has an end surface opposite to said track shaft, said end surface of each elastic member having a planar surface substantially parallel to the surface of the track shaft, and
• wherein said track shaft contacts an entire surface area of said end surface of each elastic member.