greenhouses ceiling support tube feet of the intended holding the lower tube mounted on the ground The lower tube sangdanwa height adjustable pipe coupling The lower and the upper tube is inserted in the lower pipe to pass through the height adjustment tube And including, the leveling tube comprising: a first groove is formed downward at the top side, the first groove on the other side opposite to the top downwards the first groove of shorter length than the length of the second groove is formed in be formed extending to the upper body and the lower step of the upper body of a cylindrical shape and the housing outer diameter and the inner diameter of the lower body is formed with a smaller outside diameter and the inside diameter of the upper body Protrude in a ring shape with side pressure ring and the pressure ring disposed in the upper body side is inserted into the first groove, the other end is inserted in the second groove, the throttle end with protruding engaging bar to the outside The coil-shaped spring is mounted on the pressure ring And a ring-like shape is detachably coupled to the upper body cover for closing the upper body inside circumference including, the top of the lower tube is inserted into the coupling the lower body, the lower portion of the upper tube is covered of the hollow and, with the spring within, through the hollow of the pressure ring inserted in the lower pipe to doedoe, in the initial state sikimyeo fixing the inner circumference of the ring is pressed in close contact with the outer peripheral surface of the upper tube, the lift the locking bar The close contact between the pressure ring and said upper tube is released. According to this, by lifting the top tube containing the throttle up and ensure it is level, the throttle can be combined by fixing the upper tube to lower tube inclined to the initial state, facilitate more robust support tube of greenhouses and ceiling height adjustment it has the advantage that you can not.본 고안의
