| 摘要 |
<p>A casing (100) forms an outer shape of each of a projector and an optical receiver of a multi-optical axis photoelectric sensor. The casing (100) includes a frame body (3) having a front face and both ends opened, a pair of caps (4, 4) to cover both ends of the frame body (3), and a light transmissive plate (6) to cover the opened front face of the frame body (3). In the inner surfaces of both side plates of the frame body (3), supports (31, 31) which extend along the corresponding side edges of the opening of the front face are formed. Both side edges of the light transmissive plate (6) are supported by the supports (31, 31), and both ends thereof are supported by the caps (4, 4). Portions of the caps (4, 4) that support the light transmissive plate (6) include communication portions to communicate with the supports (31, 31) of the frame body (3), and a string-like elastic member (7) is provided around a closed loop formed by each support and each communication portion. The light transmissive plate (6) is held between the string-like elastic member (7) and at least one fixing member disposed for the frame body (3) and the caps (4, 4). This configuration facilitates fixing of the light transmissive plate (6) and changing of a size of the frame body (3).</p> |
