| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve operability, and reduce an operation error. <P>SOLUTION: A limit switch 1 for setting a range comprises a pair of first and second counters 3A and 3B including plural digits of number wheels rotating in direction opposite to each other. The counters 3A and 3B are aligned in a direction perpendicular to an axial line direction of the number wheel, so that upper, lower, right and left sides are symmetrical to each other along the axial line direction. The counters 3A and 3B are provided with specific value returning means for returning all of the number wheels to a specific value at once. When all of the digits of the counters 3A and 3B are reduced to a specific value, signals are transmitted from the number wheel with a highest digit. One reset shaft 46 of the limit switch for setting the range is operated by one setting lever 5, so that the counters 3A and 3B are returned to a specific value, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
