| 摘要 |
PURPOSE: An elbow used for laying a pipe is provided to rapidly install a pipeline and to quickly install and release the elbow. CONSTITUTION: An elbow(1) contains a bracket(2) having attach holes(21) to adhere an outer face with a bolt or a screw. The attach holes are formed of open units(22) symmetrically opened toward outside and an elongated hole from the open units to a close unit. The elbow is attached as the attach holes are in an interval(S3) between the open unit and the close unit. Thus, a portion suitable for driving the screw into a wall is selected to firmly install the elbow. To rapidly release the elbow, the screw attached by one attach hole is removed while loosening the other screw attached by the other attach hole.
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