| 摘要 |
PROBLEM TO BE SOLVED: To provide a corporation cock mounting device which can expand the diameter of a cylindrical body for securing a corporation cock device, with a uniform degree of press-contacting force. SOLUTION: According to the structure of the corporation cock mounting device, a main shaft 8 is inserted into the cylindrical member 5 which is inserted into a branch port 2 of a fluid main pipe 1 via a rubber ring 4, and by using a lever member 37 that repeatedly carries out predetermined-angle rocking, the main shaft 8 and a hook member 6 attached to the tip thereof are reciprocated with a constant stroke. When receding, the hook member 6 expands the cylindrical member 5 outward, while when advancing, it is rotated about the shaft, and by repeatedly carrying out the receding and advancing operation, it successively expands the cylindrical member 5 outward along the entire circumference thereof, to thereby press-contact the cylindrical member to an inner surface 1a of the pipe. The main shaft 8 has an annular collar 39 formed on a peripheral surface thereof and in the same cylinder, that is circular as viewed in a plan and arcuate as viewed in a side elevation. The lever member 37 is engageable with the annular collar 39 in a circumferentially movable manner. Therefore rotation of the lever member 37 shifts a reciprocation range of the main shaft 8, and a distance between the hook member 6 at a rearmost location and the pipe inner surface 1a in an orientation in which the hook member 6 is directed, is always set to a constant value, which enables press-contacting between the cylindrical lever 5 and the pipe internal surface 1a, with the uniform degree. COPYRIGHT: (C)2007,JPO&INPIT
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