To protect an attachment screw, and to make periodical maintenance unnecessary, and also, to facilitate the alignment of the attachment screw for a screw hole of an object to be fixed, in the holding structure of screw for holding the attachment screw in a plate material, concerning the structure for screwing the plate material to the object to be fixed by the use of the attachment screw while closely attaching one side principal surface of the plate material to the object to be fixed.
A protective plate 23 is arranged on a position leaving an interval in the thickness direction of the plate material 31 on the side of the other side principal surface 31a of the plate material 31. An interval between the protective plate 23 and the plate material 31 is set so as to hold an insertion state of an axial part 7 of the attachment screw 5 with respect to an insertion hole 34 while a head part 6 of the attachment screw 5 is separated from the other side principal surface 31a and is abutted on the back surface 23b of the protective plate 23 opposite to the plate material 31. An operation hole 28 for inserting a tool, which operates the head part 6 of the attachment screw 5 through the protective plate 23 in the thickness direction, is formed on the protective plate 23. The size of the operation hole 28 is set smaller than that of the outer diameter of the head part 6 of the attachment screw 5.
AOKI YOSHIO
| JP2011075085A | 2011-04-14 | |||
| JPS62250693A | 1987-10-31 | |||
| JPH05343858A | 1993-12-24 | |||
| JP2000074032A | 2000-03-07 | |||
| JPH01312216A | 1989-12-18 | |||
| JP2011075085A | 2011-04-14 | |||
| JPS62250693A | 1987-10-31 | |||
| JPH05343858A | 1993-12-24 |
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama