| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily cope changes in the diameter of a spacer. SOLUTION: Arc-shaped frames 13, each of which has an upward opening, are continued side by side with both the upper ends connected through a thin- wall hinge 14. The lower section of the arc-shaped frame 13 is formed with a recessed part 15 for receiving an engagement piece, which is open to one side, and an elastic engagement piece 16 protruding in the direction opposite to the open side of the recessed part for receiving the engagement piece. These arc-shaped frame parts are die-cast into a continuous mold, and at a required position, the hinge 14 is cut off. A member is cut out, whose are frames at both ends are such that only one side of the arc-shaped frame, is hinged to the adjacent arc-shaped frame 13. With the member rounded into a cylindrical shape, the elastic engagement piece 16 of one of the adjacent arc-shaped frames 13 is inserted for engagement into the recessed part 15 for receiving the engagement piece of the other. The arc-shaped frames are thus connected in a cylindrical shape, around which plurality of openings are arranged, so that the respective openings of the arc-shaped frames 13 serve as accommodation parts for electric wires.</p> |
