| 摘要 |
<p>PURPOSE:To secure an outer channel rigidly to an inner channel in a wiring cover by eliminating a gap effectively between the end faces of right and left outer side boards of the outer channel and the wall face on which the bottom face of the inner channel is laid. CONSTITUTION:Right and left outer side boards 6 of an outer channel 4 having substantially U-shaped cross-section are stretched slightly farther to the wall side than the bottom board 2 of an inner channel 1 having substantially U-shaped cross-section to form a pressure receiving end 10 which is then abutted on the wall face thus providing a rule means for aligning with the wall face. Furthermore, protrusions 8 on the right and left outer side boards 6 of the outer channel 4 engage with the receiving parts 9 formed in the right and left side boards 3 of the inner channel 1. When the pressure receiving end 10 abuts on the wall face and displaced to a retreat position, the protrusions 8 are press fit to the pressure fitting parts 9' formed on the protrusion introducing end side of the receiving parts 9 thus bringing the end face of the pressure receiving end 10 into pressure contact with the wall face.</p> |
