CN2252270Y

CN2252270Y - Anti-theft bolt and special spanner

Info

Publication number: CN2252270Y
Application number: CN 96234349
Authority: CN
Inventors: 周其烽
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-01
Filing date: 1996-03-01
Publication date: 1997-04-16
Anticipated expiration: 2006-03-01

Abstract

The utility model discloses a theftproof screw bolt and a special spanner for opening the theftproof screw bolt. The utility model is characterized in that a screw head and a nut of the screw bolt are abnormity-shaped cylindrical bodies; the outer edge of a washer has a sheath; one end of a handle of the spanner has abnormity-shaped cylindrical socket cavities which are in accordance with the screw head and the nut. When the screw bolt is in use, the screw head and the nut of the screw bolt are surrounded inside the sheath of the washer, and the special spanner can screw or open the screw bolt. The screw bolt has a theftproof function.

Description

Anti-theft bolt and special spanner

The utility model relates to a kind of fastening piece.

The present bolt that is used for fastening object that generally uses, it generally all is universal accessories, when fastened object is arranged on the field, because the bolt of fastening usefulness can be turned on general Allen wrench, therefore, often cause the stolen of fastening object, for antitheft, it is often dead by weldering to be arranged on open-air object, but cause maintenance or carrying inconvenience.

The purpose of this utility model provides a kind of bolt with anti-theft feature that can only could open with special spanner.

The utility model is achieved in that the bolt that comprises screw rod, nut, packing ring, and the spiral shell head on the screw rod, nut are special-shaped cylinders, there is sheath the outer of packing ring, have a cavity on the handle of special spanner, an end of handle has and the spiral shell head, the nut special-shaped cylinder nest chamber that adapts.

The utility model is owing to the spiral shell head on the screw rod, and nut is special-shaped cylinder, and the spiral shell head, and nut is ensconced in the sheath of packing ring, and general Allen wrench can not be inserted in, and must just can tighten or turn on special spanner, therefore, has anti-theft feature.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the side view of anti-theft bolt screw rod

Fig. 2 is the plan view of anti-theft bolt screw rod.

Fig. 3 is the plan view of theftproof bolt nut.

Fig. 4 is the side view of theftproof bolt nut.

Fig. 5 is the plan view of anti-theft bolt packing ring.

Fig. 6 is the sectional view of anti-theft bolt packing ring.

Fig. 7 is the sectional view of anti-theft bolt special spanner.

Fig. 8 is the worm's eye view of anti-theft bolt special spanner.

Fig. 9 is anti-theft bolt user mode figure.

As shown in Figure 1 and Figure 2, the spiral shell head 1 on the anti-theft bolt screw rod 2 is that two opposites are the four sides cylinder of arc.

Theftproof bolt nut 3 is that two opposites are the four sides cylinder of arc as shown in Figure 3, Figure 4.

There is a sheath 4 outer as Fig. 5, anti-theft bolt packing ring 5 shown in Figure 6.

As having a cavity 8 on Fig. 7, the anti-theft bolt special spanner handle 6 shown in Figure 8, an end of handle 6 have one with anti-theft bolt spiral shell head 1, two opposites that nut 2 adapts are the cylinder nest chamber, four sides of arc.

As shown in Figure 9, anti-theft bolt in use, the spiral shell head 1 of screw rod 2 is in the cavity that packing ring 5 and sheath 4 forms, nut 3 is also in the cavity that packing ring 5 and sheath 4 form.

Claims

1. an anti-theft bolt comprises screw rod [2], nut [3], packing ring [5], it is characterized in that the spiral shell head [1] on the screw rod [2] is special-shaped cylinder, and nut [3] is special-shaped cylinder, and there is sheath [4] outer of packing ring [5].

2. a special spanner of opening anti-theft bolt is characterized in that a cavity [8] is arranged on the handle [6], and an end of handle [6] has and spiral shell head [1], the special-shaped cylinder nest chamber [7] that nut [3] adapts.