| 摘要 |
PROBLEM TO BE SOLVED: To provided an inserting coupling which allows the movement of a tube, when a force to move the tube in the leaving direction and the inserting direction owing to an earthquake and the like, while maintaining the connecting condition and the sealing property. SOLUTION: This inserting coupling 1 consists of a first connection tube 2 and a second connection tube 3 furnished with circular projections 2aa, 2ab and 2ac, circular projections 3aa, 3ab, and 3ac, removal preventive members 2c and 3c fitted in the circular recess parts 2b and 3b, and stoppers 2d and 3d, respectively. The first connection tube 2 furnishes a connection projection 2C forming an engagement projection 2e at the end in the inserting direction of the tube, while the second connection tube 3 furnishes a connection recess 3C where the connection projection 2C is fitted, at the end in the tube inserting direction. Inside the connection recess 3C, an engagement recess 3e to engage an engagement projection 2e at the position to allow the relative movement of the first connection tube 2 in the both directions to remove and to insert the tube; and a removal preventive part 3f to stop the movement of the first connection tube 2 in the removing direction by abutting the engagement projection 2e when the first connection tube 2 moves in the removing direction; are provided.
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