| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make a cable protective pipe line easily and reliably connectable to a knockout hole after blanking, and to reduce labor sharply when passing a cable to a working box. <P>SOLUTION: In this structure for passing the cable into the working box, the knockout hole 12 of the wall 10 of the working box is a hole to be blanked out in a roughly fixed shape by blanking operation. A knockout joint 14 is connected to this blanked-out hole. The knockout joint incudes a fitting portion 16 that is integrated with the wall 10 by being fitted and jointed in a watertight state to the knockout hole 12, and a pipe line 18 that is arranged in the passing-through direction to the knockout hole 12 and integrally connected to the fitting portion 16. Only by pushing and fitting operation of the fitting portion, the connection of the pipe line for passing the cable to the working box can be finished. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
