To provide a loosening prevention tool that is used for joining a building material by using a lengthy screws, can improve construction accuracy, and can prevent the loosening of the lengthy screw even if the building material is contracted.
The loosening prevention tool held between the head of the screw and the building material includes: a bend which is formed by plastically deforming a plate-shaped metal material having elasticity at an acute angle; a fixed part which extends from part of the bend, is made to abut in the building material, and has a penetration hole which allows the penetration of the screw; and a movable part which extends from the other part of the bend, is inserted with the screw, and has a guide groove which abuts on an axis of the screw, and guides the screwing direction of the screw. While the axis of the screw is inserted into the penetration hole and the guide groove, the head of the screw is pressed against the movable part, the movable part is moved to a direction in which the movable part approaches the fixed part, and the movable part and the fixed part are biased toward a direction in which they are separated from each other by the elastic stress of the bend.
JP2011256938 | ANTI-SLIP SEAT FOR FASTENING MEMBER |
HIROSE TERU
JP2002039140A | 2002-02-06 | |||
JPS6026317U | 1985-02-22 | |||
JPH0446229A | 1992-02-17 | |||
JP2009270611A | 2009-11-19 | |||
JP2006307965A | 2006-11-09 | |||
JP2000009164A | 2000-01-11 | |||
JP2010038228A | 2010-02-18 | |||
JP2007016864A | 2007-01-25 | |||
JP2000282588A | 2000-10-10 | |||
JP2007120001A | 2007-05-17 | |||
JP2000274420A | 2000-10-03 | |||
JP2006153061A | 2006-06-15 | |||
JPH0658317A | 1994-03-01 | |||
JPH08280150A | 1996-10-22 |
Next Patent: SPEED CHANGE GEAR