| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a connecting structure for a pipe with a pipe laying apparatus capable of enhancing the easiness to execute the operations and also the anti-seismic performance. <P>SOLUTION: A spigot 43 of a gate valve is inserted into a socket 36 of the pipe 32, where a spigot projection 46 is formed on the peripheral surface of the spigot 43, on which 43 a push ring 48 for hindering it 43 from slipping off from the socket 36 is fitted externally and coupled fast with the socket 36 by bolt(s) 49, and a slipoff preventive projection 57 is formed on the push ring 48. The spigot projection 46 is engaged with the slipoff preventive projection 57 about the drawn-out direction B of the spigot 43, while the push ring 48 is furnished with a notch 61 to admit passage of the spigot projection 46 through the slipoff preventive projection 57 in the pipe axis 31a direction, and in case the spigot projection 46 and the notch 61 are positioned identical in the circumferential direction, the spigot projection 46 can pass through the slipoff preventive projection 57. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
