| 摘要 |
A pipe joint having variable length is provided to extend a length of a pipe assembly by connecting pipes to each other using the pipe joint having variable length. A pipe joint having variable length is used for connecting two pipes to each other. The pipe joint comprises a connection pipe(10), an inner pipe(20), and a rotary bolt(30). The connection pipe is provided at one end thereof with a connection part(12) into which one pipe(1) is screw-coupled. The inner pipe is provided at one end thereof with a rubber packing(22). The rubber packing is fitted into an inner peripheral surface of the connection pipe. The inner pipe is provided at the other end thereof with a nut(24) which is screw-coupled with a screw(2') formed at an outer peripheral surface of the other pipe(2). The rotary bolt is formed at an outer peripheral surface thereof with a rotary screw section(32) that is engaged with a screw section(26) formed at an outer peripheral surface of the inner pipe.
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