CN2793397Y

CN2793397Y - Expansion screw

Info

Publication number: CN2793397Y
Application number: CN 200520034101
Authority: CN
Inventors: 司建光
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-30
Filing date: 2005-04-30
Publication date: 2006-07-05
Anticipated expiration: 2015-04-30

Abstract

The utility model relates to an expansion screw, particularly to an improvement for the original expansion screw. The utility model has the technical scheme that the expansion screw of the utility model is composed of a screw rod (1), an expansion tube (2), a conical nut (3), a flap gasket (4) and a grower washer (5) which are well known, wherein the conical nut (3) is a hexagonal truncated cone, and the expansion tube (2) is an inner hexagonal prism correspondingly; the conical nut (3) and the expansion tube (2) are installed in a drill hole of a building, and fixed articles are fixed on the building by the screw rod (1), the flap gasket (4) and the grower washer (5). The utility model has the advantages that the utility model installs a screw bolt reversely, so after the fixed article is fixed, only a hexagonal screw cap is left on the wall or on the ground. After the expansion screw bolt is detached, the screw rod is taken out. In this way, the utility model solves the problem that the screw rod is not easy to be take out after the original expansion screw is detached. The utility model has the advantages of simple production technology, low cost, economy, practicality and convenient use. The size and the kind of the screw bolt can be chosen according to requirements.

Description

Setscrew

Technical field

The utility model relates to a kind of setscrew, particularly relates to a kind of improvement to former setscrew.

Background technique

In our daily life, setscrew is used very extensive, brings great convenience for people's work and life.But, the setscrew that present people use always also has its deficiency, EXPANSION ANCHOR BOLTS is fixed on fixation on wall or the ground, EXPANSION ANCHOR BOLTS has long screw rod silk head to be exposed after installing, look very not attractive in appearance, if be installed in the ground of public place, as square, park, road limit etc., the screw rod silk head that is exposed is not only not attractive in appearance, and is very dangerous yet.After particularly fixation was removed, EXPANSION ANCHOR BOLTS was not easy to take out very much, as taking out by force, will destroy the surface of buildings such as ground or wall.People stay among the building often to removing the EXPANSION ANCHOR BOLTS of fixation, and on EXPANSION ANCHOR BOLTS such as the stand-down, what the setscrew of this moment was exposed when it is worked also will grow, and particularly the elderly and children are a potential danger to the pedestrian.The tapered cup nut setscrew of prior art, complex manufacturing has special shape and processing request to expansion tube and tapered cup nut, its cost height, very uneconomical practicality.

The model utility content

The technical problems to be solved in the utility model is to overcome the deficiency that prior art exists, and provides on a kind of fixation fixing back wall or the ground and only stays six square nuts, and what show on wall or the ground after removing is the setscrew on plane.

The utility model is achieved by following technical proposals: the utility model setscrew is made up of known screw rod 1, expansion tube 2, tapered cup nut 3, plain washer 4 and spring washer 5, described tapered cup nut 3 is the truncate cones of six ribs, and expansion tube 2 is corresponding interior six ribs.

The utility model setscrew has following beneficial effect compared with prior art: because the utility model is reverse construction bolt, only stay six square nuts on fixation fixing back wall or the ground, solved former EXPANSION ANCHOR BOLTS screw mandrel and exposed more unsafe again problem neither attractive in appearance; What take out after particularly EXPANSION ANCHOR BOLTS is removed is screw rod, and what stay in the building is nut and expand tube, and what show on wall or the ground is the plane, has solved former setscrew and has removed the problem that the back screw rod is difficult for taking-up.The utility model production technology is simple, only needs the truncate tapered cup nut of nut working surface is saved raw material, and cost is low, and is economical and practical.Can select the size and the kind of bolt as required, easy to use.The utility model is applicable to all kinds of buildings and ground fixture body.

Description of drawings

The utility model has following accompanying drawing:

Fig. 1 is the utility model setscrew package assembly schematic representation;

Fig. 2 is the utility model setscrew form structure schematic representation.

Wherein: 1, be screw rod; 2, be expansion tube; 3, tapered cup nut; 4, be plain washer; 5, be spring washer.

Embodiment

Below in conjunction with drawings and Examples the utility model technology is further described.

The utility model setscrew is made up of known screw rod 1, expansion tube 2, tapered cup nut 3, plain washer 4 and spring washer 5, and described tapered cup nut 3 is the truncate cones of six ribs, and expansion tube 2 is corresponding interior six ribs.

Described tapered cup nut can also be many ribs or even circle; Expansion tube can also be corresponding interior many ribs or even circle, and its wall thickness is selected between 0.5～1.5mm according to the size of bolt.

During use, on buildings such as ground or wall, bore a hole that is slightly larger than the expansion tube diameter earlier, generally can put in the hole and be advisable with expansion tube 2, at first expansive screw 1 is penetrated expansion tube 2 and tapered cup nut 3 screwed connections, with setscrew integral body put into hole, when tightening screw rod 1, tapered cup nut 3 is under screw rod 1 tension, expansion tube 2 is expanded, and expansion tube 2 is combined closely the screw rod 1 of can back-outing then with building, fixation is placed on the building, the hole of the hole of fixation and expansion tube 2 aligns, and again screw rod 1 is pierced into expansion tube 2, tightens screw rod 1 and just reaches fixation is fixed to purpose on the building.

During use, can also on building, bore a hole that is slightly larger than expansion tube 2 diameters, with tapered cup nut 3 place put in the expansion tube 2 hole, the hole of the hole of fixation and building is aligned, screw rod 1 is penetrated in the hole of building in the hole of fixation, tighten screw rod 1, setscrew self and fixation all are fixed.The method is used for the small-sized object that is fixed.

Claims

1, a kind of setscrew is made up of known screw rod (1), expansion tube (2), tapered cup nut (3), plain washer (4) and spring washer (5), it is characterized in that: described tapered cup nut (3) is the truncate cones of six ribs; It is corresponding interior six ribs that described expansion tube (2) is made.

2, setscrew as claimed in claim 1 is characterized in that: described tapered cup nut (3) can also be many ribs; Described expansion tube (2) can also be corresponding interior many ribs.