Installation apparatus

1. An installation apparatus for installing a wire harness over a fixed structural body and a movable structural body which is slidably provided to the fixed structural body, the installation apparatus comprising:

a case that receives the wire harness such that the wire harness extends in a sliding direction of the movable structural body, and is folded back into a generally U-shape; and

a slider that holds a distal end-side portion of the wire harness extending from the folded-back portion toward a distal end of the wire harness, and is slidably supported within the case so as to move in the sliding direction of the movable structural body, and is movable in accordance with a sliding movement of the movable structural body,

wherein the case includes opposing side walls each having an inner face which extends in the sliding direction of the movable structural body, each said inner face acting as a bearing surface; and

wherein the slider is received within the case, and slides on the bearing surface associated with each said inner face so that the slider is guided in the sliding direction of the movable structural body.

2. The installation apparatus according to claim 1 , wherein at least one rib, which extends in the sliding direction of the movable structural body, is provided on a bottom wall of the case; and

wherein the slider is mounted on the rib.

3. The installation apparatus according to claim 2 , wherein the at least one rib is two ribs which are spaced from each other;

wherein a slit is formed in an upper wall of the case, and extends in the sliding direction of the movable structural body;

wherein the distal end of the wire harness is led out from the case through the slit; and

wherein a width of the slit is smaller than the distance between the two ribs, and the slit is disposed above the two ribs.