| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need of providing a lower hole on an eaves plate when screwing a machine screw for loosening prevention.SOLUTION: A proximal end of an eaves plate 2 is held by a holding frame material 3. For the holding frame material 3, a pair of holding plate parts 31 and 32 are provided vertically facing each other across a holding groove 33 on a front surface of a back plate part 30. A groove width d of the holding groove 33 roughly matches a thickness t of the proximal end of the eaves plate 2. At a part corresponding to the holding groove 33 of the back plate part 30, a machine screw insertion hole 34 is opened. The proximal end of the eaves plate 2 is fitted into the holding groove 33 between the holding plate parts 31 and 32 to a position where a proximal end face reaches the front surface of the back plate part 30. To the proximal end face of the eaves plate 2, a machine screw 5 for loosening prevention, which is inserted from the back surface side of the back plate part 30 to the machine screw insertion hole 34, is screwed. |
