| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a material of a ground wire pull-in port in a concrete utility pole that makes it possible to reliably prevent the ingress of concrete (cement mortar) into its body when the concrete utility pole is manufactured and it possible to easily obtain a ground wire pull-in port after formwork removal. <P>SOLUTION: The pull-in port material includes a cylindrical body 1 buried in the peripheral wall of a concrete utility pole when the pole is formed. The body 1 is provided at the back end of its hollow portion 2 with a lid material 3 that is connected to the inner wall of the cylindrical body 1 at its peripheral-end thin portion 3a and is thereby supported. The lid material is provided with a screw hole 5 for screwing the tip of a support bolt 10 for supporting its base portion on a formwork for forming the utility pole. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
