| 摘要 |
PROBLEM TO BE SOLVED: To protect a detection sensor part exposed to the outside.SOLUTION: At a portion on the rear side of a body part 5, a mounted part S is held between side parts of a mounting metal fitting 3, the body part 5 (sensor light part 2) is mounted on the mounted part S. A U-bolt 7 is rotatably mounted on an upper part of the rear surface part of the body part 5, and the mounting metal fitting 3 is provided at the tips of this U-bolt 7 (mounting shaft parts 7b) in an engagement state in which the mounting shaft parts 7b passes through through-holes 11, 12. By being rotated with respect to the body part 5, the U-bolt 7 can selectively take a mounting position where the body part 5 can be mounted on the mounted part S using the mounting metal fitting 3 and a protective position where the detection sensor portion 4 is protected by being covered with the mounting metal fitting 3. |
