DOUBLE PIPE-TYPE JOINT STRUCTURE

To realize a double pipe-type joint structure in which allowable displacement is large.SOLUTION: A plurality of outer seal members 41, 42 connect an outer peripheral surface of a first outer pipe 11 and an inner peripheral surface of a second outer pipe 12, and connect an outer peripheral surface of a third outer pipe 13 and the inner peripheral surface of the second outer pipe 12. A plurality of inner seal members 51-54 connect an outer peripheral surface of a first inner pipe 21 and an inner peripheral surface of a second inner pipe 22, connect an outer peripheral surface of a third inner pipe 23 and the inner peripheral surface of the second inner pipe 22, connect the outer peripheral surface of the third inner pipe 23 and an inner peripheral surface of a fourth inner pipe 24, and connect an outer peripheral surface of a fifth inner pipe 25 and the inner peripheral surface of the fourth inner pipe 24.SELECTED DRAWING: Figure 1 【課題】許容変位が大きい二重管型継手構造を実現する。【解決手段】複数の外側用シール部材４１，４２は、第１の外側管１１の外周面と第２の外側管１２の内周面とを接続し、第３の外側管１３の外周面と第２の外側管１２の内周面とを接続するものであり、複数の内側用シール部材５１〜５４は、第１の内側管２１の外周面と第２の内側管２２の内周面とを接続し、第３の内側管２３の外周面と第２の内側管２２の内周面とを接続し、第３の内側管２３の外周面と第４の内側管２４の内周面とを接続し、第５の内側管２５の外周面と第４の内側管２４の内周面とを接続するようにした。【選択図】図１