CN2403938Y

CN2403938Y - Expansion bolt

Info

Publication number: CN2403938Y
Application number: CN 99221904
Authority: CN
Inventors: 曹现强; 王良军
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-07
Filing date: 1999-08-07
Publication date: 2000-11-01
Anticipated expiration: 2009-08-07

Abstract

The utility model relates to a novel expansion screw bolt, which is composed of the screw bolt (1), a nut (2), and an expansion tube (3), wherein, an expansion segment of the expansion tube is divided into a plurality of expansion pieces (4); a sectional plane of a raised head (6) of the screw bolt is an oblate shape, and a barb rib (5) is arranged on the inclined plane of the outer circle. When the nut is screwed tightly, partial expansion pieces of the expansion tube are braced. An anchoring function is played. While the other part keeps an original state. The barb rib (5) can be inlaid into a gap of the expansion pieces. The screw bolt is prevented from rotating relative to the expansion tube. When the novel expansion screw bolt needs to be dismantled after use, the nut is loosened. The screw bolt is rotated, and the expansion pieces which are not opened are clamped by the barb rib. Thus, the novel expansion screw bolt can be withdrawn.

Description

Upset bolt

The utility model belongs to a kind of bolt, particularly relates to a kind of EXPANSION ANCHOR BOLTS.

EXPANSION ANCHOR BOLTS is anchoring components and parts commonly used in engineering and the life.At present the EXPANSION ANCHOR BOLTS of using is made up of bolt, nut and expansion tube, and its cross section is circle, and expansion tube divides expansion arc and unexpansive section.In use there is following problem: the one, bolt rotates with respect to expansion tube, and perhaps expansion tube rotates with respect to porthole, all causes nut to tighten, and expansion tube can not expand or expand insufficient; Or the desire dismounting time can't unclamp nut, is not easy to EXPANSION ANCHOR BOLTS is removed.The 2nd, after EXPANSION ANCHOR BOLTS is used, can't take out, can not repeatedly use, and cause body of wall after getting rusty, metope not attractive in appearance.

The purpose of this utility model promptly is to provide a kind of upset bolt, overcoming between bolt and expansion tube problem in relative rotation, and reaches and is convenient to dismounting, reused purpose.

The utility model is made up of bolt (1), nut (2) and expansion tube (3), an end band rib-loop of bolt, and the other end is plush copper (6); Expansion tube divides expansion arc and unexpansive section, and expansion arc is along being divided into some intumescent sheets (4) with the parallel axes direction, and is gapped between the adjacent intumescent sheet; Of the present utility model being characterised in that, the plush copper cross section of bolt are oblate, and hangnail rib (5) is arranged on its cylindrical inclined-plane.

Because its cross section of plush copper one end of the utility model bolt is oblateness rather than full circle shape, when fastening nut, the demi-inflation sheet of expansion tube is not strutted, when using the back desire that it is removed, make the hangnail rib block not open intumescent sheet, it can be extracted out, therefore the utlity model has dismounting, the reused characteristics be convenient to, and owing on the bolt plush copper cylindrical inclined-plane hangnail rib is arranged, thereby overcome bolt relative to the problem of rotating with expansion tube.

The accompanying drawing part further discloses an embodiment of the present utility model:

Fig. 1, the upset bolt erection drawing;

Fig. 2, A is to view;

Fig. 3, the bolt plush copper struts the phase diagram of demi-inflation sheet;

Fig. 4, bolt plush copper hangnail rib blocks and does not open the intumescent sheet phase diagram.

As shown in Figure 1, upset bolt is made up of bolt (1), nut (2) and expansion tube (3), an end band rib-loop of bolt, and the other end is plush copper (6), and hangnail rib (5) is arranged on the plush copper cylindrical inclined-plane.Expansion tube (3) divides expansion arc and unexpansive section, and expansion arc is along being divided into six roots of sensation intumescent sheet (4) with the parallel axes direction, and is gapped between the adjacent intumescent sheet.Some granular or strip projection (7) are arranged, to increase the frictional force between expansion tube and porthole on the outer round surface of expansion tube.

As shown in Figure 2, plush copper (6) cross section is oblate.

As shown in Figure 3, when last jack panel, the bolt plush copper struts four intumescent sheets (4), and two other intumescent sheet (4) maintains the original state, and at this state, hangnail rib (5) just embeds in the intumescent sheet gap, neither hinder intumescent sheet to open, can prevent that again bolt is relative to rotating with expansion tube.

As shown in Figure 4, bolt is rotated 90 degree, make its plush copper cylindrical hangnail rib (5) block not open two intumescent sheets.Under this state, whole EXPANSION ANCHOR BOLTS can be extracted out in by porthole.

Claims

1, a kind of upset bolt is made up of bolt (1), nut (2) and expansion tube (3), an end band rib-loop of bolt, and the other end is plush copper (6); Expansion tube divides expansion arc and unexpansive section, and expansion arc is along being divided into some intumescent sheets (4) with the parallel axes direction, and is gapped between the adjacent intumescent sheet; It is characterized in that said bolt plush copper cross section is oblate, and hangnail rib (5) is arranged on its cylindrical inclined-plane.

2, upset bolt according to claim 1, its feature are that also some granular or strip projection (7) are arranged on the outer round surface of expansion tube (3).