| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin valve allowing attachment and disassembly between a valve casing and a lid to be easily performed by rotating the lid by 45 degrees or less and allowing the fixation after the mounting to be reliably performed. <P>SOLUTION: In a valve of a two-way, three-way, angle shape, or the like made of synthetic resin such as vinyl chloride, for mounting a lid on a valve casing, cylindrical protrusions are provided at 2-4 places at positions obtained by equally dividing an upper outer peripheral surface of the valve casing into 2-4. Recessed grooves are provided at 2-4 longitudinal places at positions opposed to the protrusions of the valve casing on an inner peripheral surface of the lid covering it. Further, the recessed grooves are extended from middle parts, respectively, in the circumferential direction at 45 degrees or less. The mounting between the valve casing and the lid is performed by aligning the recessed grooves of the lid to the protrusions of the valve casing and by rotating it in a clockwise direction by 45 degrees or less. Alternatively, the disassembly may be performed by rotating the lid in a counterclockwise direction by 45 degrees or less. Further, a hemicylindrical small protrusion is provided at an intermediate position of two adjacent protrusions by the protrusions of the valve casing, and a hemicylindrical small recessed groove is provided between the adjacent two recessed grooves of the lid opposed thereto. <P>COPYRIGHT: (C)2013,JPO&INPIT |
