| 摘要 |
PROBLEM TO BE SOLVED: To see that the frame does not give a user a sense of unease by arranging it so that the distortion known from outside may not appear and that the distortion of an image shifting to a hanging member or the like or the bias of reflected light does not arise in the vicinity of the coupling between a base member and the hanging member. SOLUTION: The bottoms of hanging members 23 are set to the outside of the risers 22 at both ends of a base member 21. The outside end face of the hanging member 23 is provided with a bulge 28 bulging outward, and the riser 22 and the hanging member 23 are fastened for coupling by a bolt 30 piercing this bulge 28 and a nut 32. Distortion at the place other than this bulge 28 lessens, and also the rigidity of the coupling rises by this bulge 28. Furthermore, this bulge 28 strengthens the fastening force of the bolt 30, working the same as a spring washer does, and besides performs the slack stopping. |
