JPH0241714U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の原理を説明するための模式的
平面図、第２図ａ，ｂ，及びｃは本考案の一実施
例を示す要部側面図と要部斜視図、第３図ａとｂ
は従来のネジ取り外し防止方法を示す模式的要部
斜視図である。 図において、１はスリワリ付きネジ、１１は十
字穴付きネジ、３はビツト作用面、４はビツト非
作用面、１０はビツト部、１５はビツト係入孔、
をそれぞれ示す。 Fig. 1 is a schematic plan view for explaining the principle of the present invention, Fig. 2 a, b, and c are side views and perspective views of essential parts showing an embodiment of the invention, Fig. 3 a and b
FIG. 1 is a schematic perspective view of a main part showing a conventional screw removal prevention method. In the figure, 1 is a slotted screw, 11 is a cross-recessed screw, 3 is a bit working surface, 4 is a bit non-working surface, 10 is a bit part, 15 is a bit insertion hole,
are shown respectively.

Claims (1)

【実用新案登録請求の範囲】 一旦締め付けを行つた後はこれを容易に取り外
すことができない構造のネジ部材であつて、 ネジ回しをネジ締め方向に回動した時、そのビ
ツト部１０に当接するビツト作用面３と、 ネジ回しをネジ締め方向と反対方向に回動した
時、当該ネジ回しのビツト１０に当接しないビツ
ト非作用面４と、 によつてネジの頭部に形成されるビツト係入孔１
５を構成してなることを特徴とするネジ部材。[Scope of Claim for Utility Model Registration] A screw member that cannot be easily removed once it has been tightened, and that comes into contact with the bit portion 10 when the screwdriver is turned in the direction of tightening the screw. A bit action surface 3 formed on the head of the screw by a bit non-action surface 4 that does not come into contact with the bit 10 of the screwdriver when the screwdriver is rotated in the opposite direction to the screw tightening direction. Insertion hole 1
A screw member comprising: 5.