CN1311400A

CN1311400A - Full buried double side expanding screw

Info

Publication number: CN1311400A
Application number: CN 00103917
Authority: CN
Inventors: 孟祥厚
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-01
Filing date: 2000-03-01
Publication date: 2001-09-05

Abstract

A double-side expanding screw of all buried type is mainly to be used for fixing the articles on the constructions made of bricks and concrete. It is designed with expansion head thread rod of all buried type, double side expansion tube, all buried inner thread tube and the screw of out hanger.

Description

Full buried double side expanding screw

The invention belongs to the screw manufacturing technology, be mainly used in mounting article on the isostructural building of cement and brick.

Existing swell fixture is the expansion tube of a single face opening of cover on a screw rod that expansion-head arranged, and adds a plain cushion again and a nut is formed.During use it is placed in the hole-drilled wall hole, the object that fix is placed on to compress under the nut and gets final product.This product each family was basically all used.

The shortcoming of prior art is to expose long screw rod outside, and is not attractive in appearance; Owing to be that single face expands, tensility is poor.

The objective of the invention is to overcome above shortcoming, design a kind of double side expanding screw that buries entirely.

Feature of the present invention is to design to have to bury expansion-head screw rod 1 entirely, and double side expanding pipe 2 buries riffled tube 3 entirely and hangs screw 4 outward.

Fig. 1 is the structural drawing of full buried double side expanding screw;

Fig. 2 is the structural drawing of the full buried double side expanding screw that separates of outer expansion-head;

Fig. 3 is the structural drawing of surface expansion screw of footing the bill entirely;

Fig. 4 buries riffled tube 3 entirely and buries expansion-head screw rod 1 structural drawing together entirely;

Fig. 5 buries the spanner structure figure that swell fixture is used entirely.

Double side expanding pipe 2 is open double-faced on an iron pipe among Fig. 1, it is enclosed within buries entirely on the expansion-head screw rod 1, turn round and burying entirely on the expansion-head screw rod 1 burying riffled tube 3 entirely again, spanner among Fig. 5 is to be welded on the iron staff 9 by a screw rod 8 that has a nut to constitute, the screw rod of this spanner twist into bury 3 one sections of riffled tubes entirely after, with the nut compressing on the spanner, hold spanner then and all put into the good wall hole of brill burying swell fixture entirely, firmly tighten, bury expansion-head screw rod 1 entirely because the inside has, burying entirely of outside has expansion-head 5 on the riffled tube 3, forms double side expanding, advantages of higher tensile strength is arranged, unclamp the nut on the spanner this moment, and spanner withdraws from, and full buried double side expanding screw just is embedded in the building, the outside object that needs to fix is fixed with hanging screw 4 outward again, has fixed the outside, back and has only seen a screw cap.The mounting article difference is hung screw 4 optional different lengths outward.The spanner of Fig. 5 can be done across, and four statures can have the screw thread of different-diameter, and the full buried double side expanding screw of four kinds of specifications so just can be installed.The face and the metope that bury riffled tube 3 during use entirely are flat, also can be according to the thickness of mounting article, the length of hanging nail outward enters general within the walls, at this moment at the nut of spanner and bury entirely and will add an iron leg pipe between the riffled tube 3, the external diameter of this iron leg pipe is slightly smaller than the diameter of porthole, internal diameter is a bit larger tham the diameter of the screw rod of spanner, and length is more than or equal to the degree of depth that enters the wall plane.

Among Fig. 2 bury riffled tube 3 entirely and expansion-head 5 is separated, purpose is to reduce friction when compressing, this figure hangs screw 4 at home and abroad and does not draw.Other symbol description is referring to last figure.

Expansion tube 6 among Fig. 3 is single face openings, and this swell fixture can only expand by single face.This figure hangs screw 4 at home and abroad and does not also draw, and other symbol description is referring to Fig. 1.

Burying riffled tube 3 entirely and burying expansion-head screw rod 1 entirely and be in the same place among Fig. 4, interior expansion-head 7 has internal thread, and this figure hangs screw 4 at home and abroad and does not also draw, and other symbol description is referring to Fig. 1.

Claims

1, a kind of full buried double side expanding screw is characterized in that designing to have burying expansion-head screw rod 1 entirely, and double side expanding pipe 2 buries riffled tube 3 entirely and hangs screw 4 outward.

2, according to claim 1 burying entirely has expansion-head 5 on the riffled tube 3.