Abstract: Providing an overturn preventing device which can easily be mounted between a top surface of a piece of furniture and a ceiling while an axis line of a damper relative to a vertical direction is inclined at an angle ranging from 15° to 25°. The overturn preventing device includes a damper, a first base portion and a second base portion. The first base portion has a first abutting surface and a first connection. The first base portion is mounted on the top surface of the furniture. The second base portion has a second abutting surface and a second connection. The second base portion is mounted on the ceiling. A relation, X+L sin 15°?Y?X+L sin 25°, is obtained where reference symbol X designates a distance from the first abutting surface to the first connection, reference symbol L designates a length of the damper and reference symbol Y designates a distance from the second abutting surface the second connection.

Abstract: Providing an overturn preventing device which is easy in handling such as carrying. The overturn preventing device includes a damper, a first base portion, a second base portion and a connecting tool. The damper is mounted between a top surface of furniture and a ceiling. An expansion force of compressed gas filling a cylinder is applied to the damper in a direction such that a length of the damper is increased. The first base portion is rotatably connected to one of two ends of the damper and has a first abutting surface which abuts against the top surface of the furniture. The second base portion is rotatably connected to the other end of the damper and has a second abutting surface which abuts against the ceiling. The connecting tool maintains a folded state in which the damper is contracted so that the first base portion and the second base portion come close to each other.

Abstract: Providing an overturn preventing device which can be mounted to an article such as furniture irrespective of an installation location of the article and which can prevent the article from being overturned by quakes of an earthquake or the like. The overturn preventing device includes a plurality of dampers mounted between a top surface of the furniture installed on a floor surface and a ceiling. The dampers are compression damper that has a smaller damping force generated during an extending operation than a damping force generated during a compressing operation. The dampers have respective axis lines extending from a ceiling side to the top surface side of the furniture, and the axis lines are downwardly inclined and extend in a plurality of directions in a planar view as viewed from above when the dampers are mounted between the top surface of the furniture and the ceiling.

Abstract: Providing an overturn preventing device which can easily be mounted between a top surface of a piece of furniture and a ceiling while an axis line of a damper relative to a vertical direction is inclined at an angle ranging from 15° to 25°. The overturn preventing device includes a damper, a first base portion and a second base portion. The first base portion has a first abutting surface and a first connection. The first base portion is mounted on the top surface of the furniture. The second base portion has a second abutting surface and a second connection. The second base portion is mounted on the ceiling. A relation, X+L sin 15°?Y?X+L sin 25°, is obtained where reference symbol X designates a distance from the first abutting surface to the first connection, reference symbol L designates a length of the damper and reference symbol Y designates a distance from the second abutting surface the second connection.