| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the connection between duct sleeves easily executable at the installing job site of a repeater box by inserting one ends of the duct sleeves into joint sleeves into which the repeater box-side end sections of the duct sleeves are inserted and connecting ducts for burying underground cables to the other ends of the duct sleeves. SOLUTION: Each joint sleeve 14 is constituted so that a duct sleeve 16 may be inserted into the sleeve 14 and, on the outer periphery of one end of the duct sleeve 16, a male screw section 17 which is meshed with the female screw section of the joint sleeve 14 is integrally formed and a flange 16a is integrally formed with the rear end section of the screw section 17. When the duct sleeve 16 is screwed in the joint sleeve 16, the sleeve 16 is protruded from a repeater box 10. On the other end side of the duct sleeve 16, a duct joint section 19 into which a duct 20 for burying underground cable is inserted is integrally provided in the opening of the sleeve 16.</p> |
