| 摘要 |
<p>The present invention relates to a tube fastening tool provided with a coupling protrusion and a check marking. A tube fastening tool (100) connects two left and right tubes (200) and (300) to each other. The tube fastening tool (100) includes: a body (110) that is positioned in the middle between the left and right tubes (200) and (300), wherein the tip ends of the left and right tubes (200) and (300) are respectively inserted therein; left and right nuts (120 and 130) that are coupled to the left and right connection portions (111 and 112) of the body (110), respectively; and first and second sealings (140 and 150) that perform an airtight function between the left and right connection portions (111 and 112), the left and right nuts (120 and 130), and the left and right tubes (200) and (300). The check marking is formed at coupling grooves (118) which are formed in both end portions of a body unit (115), and the coupling grooves (118) are formed to have a constant length from a coupling step (119) in a tube center line direction so that the coupling protrusions (121 and 131) can be moved in the coupling grooves (118). According to the present invention, a convenient and reliable fastening can be performed between the connection portions, the nuts, and the tubes of the body and leakage can be prevented through the coupling and separating operations of the coupling protrusions and coupling step by means of an elastic force. In addition, since the check marking is formed in the coupling groove (118), the coupling and separation of the coupling protrusions (121 and 131) to and from a coupling groove step can be confirmed.</p> |
