| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diaphragm type gas meter not generating erroneous integration even when a vibration is applied from the outside during conveyance in the laid-down state of the gas meter after starting an electronic counter. Ž<P>SOLUTION: In this diaphragm type gas meter, a rotating member wherein a plurality of magnets are provided at equal intervals is journaled rotatably and concentrically with a crankshaft, and a reciprocating movement of a pair of diaphragms caused by gas flow is converted into a rotational movement of the crankshaft through a link mechanism, and the rotating member is rotated in the state where a projection part projecting to the radial direction of the crankshaft abuts on a projection part projecting to the radial direction of the rotating member, and a magnetic change of a rotating magnet is counted by a reed switch, to thereby measure a gas flow rate. In the state where the pair of diaphragms is standstill when the diaphragm type gas meter is laid down so that the diaphragms become horizontal, some of the magnets is faced to the reed switch, and the projection part of the crankshaft is arranged so as to be aligned on a position facing to some of the magnets. The projection part of the rotating member is arranged near the middle point between adjacent magnets. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
