| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reliable width measuring device for a sheet member of which measured value does not change due to a change in ambient temperature. <P>SOLUTION: A width measuring device for a sheet member comprises a first line sensor 2a which detects the position of one side end of a sheet member 1 and a second line sensor 2b which detects the position of the other side end of the sheet member 1. The line sensors 2a, 2b have such effective lengths that can detect the positions of the side ends of the sheet member 1 of which width is within the range between the maximum width and the minimum width. The first line sensor 2a is fixed to a first sensor support member 4a and the second line sensor 2b is fixed to a second sensor support member 4b, with the first sensor support member 4a being fixed to one end of a common support member 5, the second sensor support member 4b being fixed to the other end, and the linear expansion coefficient of the first and the second sensor support members 4a, 4b being different from that of the common support member 5. <P>COPYRIGHT: (C)2013,JPO&INPIT |
