CN2795535Y

CN2795535Y - Backing stop type irregular anti-theft fastener

Info

Publication number: CN2795535Y
Application number: CN 200520071392
Authority: CN
Inventors: 刘宇飞; 仝艳利
Original assignee: 仝合泽
Priority date: 2005-04-30
Filing date: 2005-04-30
Publication date: 2006-07-12
Anticipated expiration: 2015-04-30

Abstract

The utility model relates to a back stop type irregular anti-theft fastening member. A hexagonal nut is screwed on a bolt, and the outer side of the hexagonal nut is provided with a taper circular nut. A spiral tooth-shaped back stop ring is arranged between the taper circular nut and the hexagonal nut. A spiral back stop tooth which is corresponding to the screw pitch of screw threads is arranged on the inner hole wall of the spiral tooth-shaped back stop ring. A taper cylinder is arranged on the outer wall of the taper circular nut. Due to the fact that the structure is adopted by the utility model, the fastening member has the advantages of simple structure and convenient installation and use. The fastening member can cause connecting members of outdoor public facilities to be fastened, the outdoor public facilities can not be disassembled, and the utility model has good anti-theft performance. The utility model is suitable for being used when members of outdoor public facilities of an electric power iron tower, a railway, a highway, a bridge, etc. are connected, and national property safety and the life safety of people are effectively ensured.

Description

Non-return special type anti-theft fastener

Technical field

The utility model relates to the fastening anti-theft device that a kind of outdoor communal facility member connects usefulness.

Background technique

At present, it is bolt and hexagon nut that outdoor communal facility members such as electric power tower, railway, highway, bridge connect employed conventional fasteners, the back is installed owing to be subjected to the effect of external force, loosening easily, artificial removing damaged phenomenon is serious, causes great threat for national wealth and people's life safety.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, easy to use, non-return special type anti-theft fastener that theftproof performance is good.

The purpose of this utility model is achieved in that and is screwed with hexagon nut on the bolt, there is the tapering round nut in the outside of hexagon nut, be provided with the screw serrated form Non-return ring between tapering round nut and the hexagon nut, the inner hole wall of screw serrated form Non-return ring is provided with and the corresponding helical locking tooth of thread pitch.

The outer wall of tapering round nut is the awl cylinder.

Because the utility model adopts said structure, this fastener constructions is simple, installation, easy to use, and can make outdoor communal facility member fastening, make it and to dismantle, retaining and theftproof performance are good, are suitable for using when outdoor communal facility member such as electric power tower, railway, highway, bridge connects, and have effectively guaranteed the safety of national wealth and people's life.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the structural drawing of the utility model screw serrated form Non-return ring.

Fig. 3 is the left view of Fig. 2.

1 bolt, 2 tapering round nuts, 3 screw serrated form Non-return rings, 4 hexagon nuts, 5 helical locking tooths among the figure.

Embodiment

Embodiment: be screwed with hexagon nut 4 on the bolt 1, there is tapering round nut 2 in the outside of hexagon nut 4, be provided with screw serrated form Non-return ring 3 between tapering round nut 2 and the hexagon nut 4, the inner hole wall of screw serrated form Non-return ring 3 is provided with and the corresponding helical locking tooth 5 of thread pitch.The outer wall of tapering round nut 2 is the awl cylinder.

Earlier bolt 1 is passed the long splice member during use, load onto hexagon nut 4 then, after hexagon nut 4 is fixing, load onto screw serrated form Non-return ring 3 and tapering round nut 2 more according to this, when tapering round nut 2 is fastening, on the inner hole wall of screw serrated form Non-return ring 3 with the corresponding helical locking tooth 5 of thread pitch, under the effect of external force, flattened by tapering round nut 2, and in the screw thread of stud bolt 1, the screw thread plastic deformation can't be dismantled, thereby reach antitheft purpose.

Claims

1, a kind of non-return special type anti-theft fastener, be screwed with hexagon nut on the bolt, it is characterized in that: there is the tapering round nut in the outside of hexagon nut, be provided with the screw serrated form Non-return ring between tapering round nut and the hexagon nut, the inner hole wall of screw serrated form Non-return ring is provided with and the corresponding helical locking tooth of thread pitch.

2, a kind of non-return special type anti-theft fastener according to claim 1 is characterized in that: the outer wall of tapering round nut is the awl cylinder.