The present invention is to horizontally position the base plate and having both left and right sides of the left and right base plate vertically upward Vertical consideration as integrally formed and disposed horizontally penetrating captive bolt is left for the left and right vertical clamping nut has been screwed by gripping the pipe between the top of the greenhouses have already installed and adjusted for vertical spacing between the left and right As the connection is secure and the pipe connection, the pipe connecting the bottom of the base plate is formed to project vertically downward in the installation cost, and having a first plastic is a plastic which is installed through the through adding a plurality of first outer peripheral surface of the upper portion of the first plastic mounting base departure prevention protrusion is formed, and the escape prevention part of the first protrusion is formed, the first installation part and the plastic, the plastic mounting base for fixing the first part in close contact with the lower surface of the first plastic retaining ring while coupling the base plate fitting vinyl projecting integrally formed vertically downward to the lower and the second plastic washer is installed which is supported on the upper peripheral surface disposed through the other plastic which is installed in a state of being fitted more consideration having an upper portion and a plurality of second outer peripheral surface of the second plastic mounting base departure prevention protrusion is formed, and a multi-layer plastic, characterized in that the said second release preventing portion is formed, consisting of projections in a second plastic to secure close contact with the part when the installation of the second plastic retaining ring while the other support fitting the plastic washer relates to the old house installation.본 고안은 수평으로 위치된 베이스판이 구비되고 상기 베이스판의 좌우양측에는 수직상방으로 좌우측 수직대가 일체로 형성되며 상기 좌우측 수직대에는 좌우수평방향으로 조임볼트가 관통개재되면서 조임너트에 의해 나사
