< Topic >The end of the joint which you do not intend is prevented, the removal is easy, the joint possible telescopic joint is offered the tubed base and to firm.SolutionsWith the tube-like object of the air which has elasticity and flexibiility, we have possessed the annular irregularity (Yamatani) structure which on the inside surface near the opening of one side, is provided at least parallel with the edge of the edge of the opening respectively in independence, the tubed base and it is engagement joint of the tube-like object which possesses irregularity structure in external surface possible, because the telescopic joint and the irregularity structure which the tubed base engages respectively it has, it is jointed by firm and the end which is not intended being prevention possible, annular irregularity structure by the fact that it is independently, joint becomes loose with the twist operation of iteration and would like to remove either the fear of coming off without,When, by the fact that a little twisting operation and pulling operation are done together, it deforms the telescopic joint flexiblly with elasticity and flexibiility, can remove optionally.< Choice figure >Drawing 1【課題】意図しない接続の外れを防止し、取り外しが容易な、筒状口金と強固に接続可能な筒型ジョイントを提供する。【解決手段】弾性と可撓性を備えた中空の筒状体で、少なくとも片方の開口部付近の内表面に、開口部の端の稜線と平行にそれぞれ独立に設けられた環状の凹凸(山谷)構造を有しており、外表面に凹凸構造を有する筒状体の筒状口金と係合接続可能であり、筒型ジョイントと筒状口金がそれぞれ係合する凹凸構造を備えているため、強固に接続され意図しない外れが防止可能で、環状の凹凸構造が各々独立していることで、繰り返しのねじれ動作により接続がゆるみ外れる恐れもなく、外したい場合には、少々のねじり動作と引き動作を共に行うことで、筒型ジョイントは弾性と可撓性により柔軟に変形し、任意に外しできる。【選択図】図1
