| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to perform the insertion of a distribution cable smoothly and quickly by attaching a low-friction sheet to the inner surface of each wiring hole penetrating a wiring block made of concrete. SOLUTION: A wiring block made of concrete is constituted by the polymerization of half-mounted blocks 1a, which are divided into the axial direction from the position, where the diameter of a wiring hole 2 is divided into two upper and lower parts. Therefore, each half-mounted block 1a has a semi-arc shaped half-mounting wiring hole 2a. A low-friction sheet 4a is attached to the respective inner-surface concrete plane of this half-mounting wiring hole 2a and rigidly bonded to the side of the wiring block 1 by the adhesive property of the concrete. The low-friction sheet 4a is closed by the polymerization of the half-mounting blocks 1a and arranged in a ring pattern. Thus, the inserting work into the wiring hole 2 can be performed smoothly and quickly by the attaching structure of the low-friction sheet 4a.</p> |
