WO2011050654A1

WO2011050654A1 - Anti-shock anchor bolt

Info

Publication number: WO2011050654A1
Application number: PCT/CN2010/076609
Authority: WO
Inventors: 瞿滨
Original assignee: 福建鹏坤实业有限公司
Priority date: 2009-10-28
Filing date: 2010-09-03
Publication date: 2011-05-05
Also published as: CN101713428A; CN101713428B

Abstract

Provided is an anti-shock anchor bolt, which consists of a nut (1), a screw rod (2) and at least two expansion pieces (3). There is a screw portion (21) at the outer end of the screw rod and a bolt head (22) at the inner end of the screw rod. A plurality of expansion pieces are put on the screw portion of the screw rod one by one. The nut is screwed on the screw portion of the screw rod. The expansion piece is a tube part which is manufactured by rolling a sheet part after punching. There are long tooth pieces (31) and short tooth pieces (32) intercrossed with each other at the opposite ends of two adjacent expansion pieces. The ends of the long tooth pieces are bent outwardly. The anti-shock anchor bolt has a simple structure with a great fastening force, presenting the advantages of better anchoring efficiency and anti-shock ability.

Description

Anti-seismic anchor

技术领域Technical field

The invention belongs to the technical field of building anchors, in particular to an earthquake-resistant anchor bolt.

背景技术Background technique

As shown in FIG. 1 , the conventional anchor bolt is composed of a nut 100, a screw 200 and an expansion member 300. The inner end of the screw 200 has a wedge-shaped head 201. The expansion member 300 has a tubular shape and has a tooth piece 301 at the inner end and 300 sets of the expansion member. On the screw 200, the tooth piece 301 abuts against the wedge head 201, and the nut 100 is screwed over the outer end of the screw 200.

During installation, the screw 200 sleeved with the expansion member 300 is inserted into the drilled wall hole, and the external object is hung on the outer end of the screw 200. Then, the nut 100 is screwed onto the screw 200, and the nut 100 is screwed. Pushing the expansion member 300 into the wall hole, so that the inner end tooth piece 301 of the expansion member 300 is expanded under the guidance of the wedge head 201, and firmly grasps the inner wall of the wall hole, so that the entire anchor bolt is fixed in the wall hole. To achieve the purpose of fixing the external objects on the building.

After analysis, the anchor bolt has many defects: because the number of the teeth 301 of the expansion member 300 is small, the contact surface with the wall hole is small, and the gripping force is insufficient; moreover, the tooth piece 301 of the expansion member 300 is wedge-shaped at the inner end of the screw 200. The head 201 is guided to expand, and the expansion is slow, and the angle after the expansion is small, which also leads to insufficient grasping force. Therefore, the existing building anchor bolt has insufficient gripping force, poor anchoring effect, and poor earthquake resistance.

In view of this, the inventors have improved the structure of the building anchor, and the present invention has been produced.

发明内容Summary of the invention

The object of the present invention is to provide an anti-vibration type anchor bolt, which has strong gripping force, good anchoring effect, strong earthquake resistance, simple structure and convenient processing and manufacture.

In order to achieve the above object, the solution of the present invention is:

An anti-vibration type anchor bolt consists of a nut, a screw and at least two expansion members; the outer end of the screw has a threaded section and the inner end has a bolt head; a plurality of expansion parts are placed one by one on the threaded section of the screw; the nut is screwed On the threaded section of the screw; wherein the expansion member is a tubular member which is formed by rolling a sheet of material, and the opposite ends of the adjacent two expansion members form long and short teeth which intersect each other, and the long teeth The ends are bent outwards.

The inner end of the expansion member of the bolt head extends to form a positioning bar, and the positioning bar is bent to form a positioning hook, and the positioning hook is hooked on the bolt head of the screw.

A positioning groove corresponding to the expansion member and a positioning hook are formed on the side wall of the bolt head of the screw, and the positioning bar and the positioning hook are located in the positioning groove.

A threaded washer is placed on the threaded section of the screw and the nut is screwed.

The bolt head is integrally formed on the screw.

The bolt head and the screw are separately formed, and the bolt head is fixed on the screw.

After the above structure is used, when the invention is installed, the wall is drilled, the expansion member is placed on the screw, and the bolt head of the screw is inserted into the pre-drilled wall hole, and then the external object is hung on the wall. On the screw, finally, the nut is screwed on the threaded section of the screw, so that the plurality of expansion members are squeezed and compressed along the pitch of the screw axis, causing the long toothed piece to slide on the short toothed surface, and two displacements are generated during the sliding process. It is the displacement along the axis of the screw, so that the spacing between adjacent expansion members is compressed, and the second is the displacement along the direction of the screw diameter, so that the outer diameter of the curved surface of the long tooth piece is continuously increased, and the long tooth piece is continuously cut into the wall. Because the long and short teeth of the adjacent expansion members are interdigitated, the effect of the opposite cutting is formed, so that the anchor is subjected to the bidirectional force along the axis of the screw, and the seismic performance is greatly improved.

The invention has at least two expansion members, each of which has a long tooth piece, so that the contact surface of the expansion member and the wall hole is doubled, and the gripping force is greatly improved, so the fixing effect is good. Moreover, the structure of the invention is simple, and the expansion member is formed by curling a sheet of material after processing, which is very convenient.

附图说明DRAWINGS

Figure 1 is a schematic structural view of a conventional building anchor;

Figure 2 is an exploded perspective view of the present invention;

Figure 3A is a combined perspective view of the present invention;

Figure 3 is a combined plan view of the present invention;

Figure 4 is a use effect diagram of the present invention;

Figure 5 is a developed perspective view of the expansion member 1 of the present invention;

Figure 6 is a side view of the expansion member 1 of the present invention;

Figure 7 is a developed perspective view of the expansion member 2 of the present invention;

Figure 8 is a side elevational view of the expansion member 2 of the present invention.

Label description

Nut 100

Screw 200 wedge head 201

Expansion member 300 tooth 301

Nut 1

Screw 2 threaded section 21

Bolt head 22 positioning groove 23

Expansion member 3 long tooth 31

Short tooth 32 positioning strip 33

Positioning hook 34

Washer 4

具体实施方式detailed description

2 and 3A and 3 show a preferred embodiment of the present invention. An anti-vibration type anchor bolt is composed of a nut 1, a screw 2 and at least two expansion members 3 (only two of them are exemplified herein).

The outer end of the screw 2 has a threaded section 21 and the inner end has a bolt head 22. The bolt head 22 may be integrally formed on the screw 2 or may be fixed to the screw 2 after being separately formed from the screw 2.

A plurality of expansion members 3 are placed one by one on the threaded section 21 of the screw 1. The expansion member 3 is a pipe member which is formed by rolling a sheet of material, wherein the expansion member 3 near the bolt head 22 is made of the sheet shown in Figs. 5 and 6, and the other expansion member 3 is made of Fig. 7 and The sheet shown in Fig. 8 is made. The opposite ends of the adjacent two expansion members 3 form long teeth 31 and short teeth 32 which intersect each other, and the ends of the long teeth 31 are bent outward. In order to allow the expansion member 3 to be rapidly expanded after being squeezed, and to prevent the expansion member 3 from rotating relative to the screw 2, the inner end of the expansion member 3 shown in Figs. 5 and 6 is further extended to form a positioning strip 33, and the positioning strip 33 is bent to form a positioning. A hook 34 is hooked on the bolt head 22 of the screw 2. In this embodiment, the positioning bar 33 and the positioning hook 34 of the expansion member 3 on the side wall of the bolt head 22 of the screw 2 are further provided with a positioning groove 23, and the positioning bar 33 and the positioning hook 34 are located in the positioning groove 23, so that the expansion member 3 The inner end is fixed with the bolt head 22 of the screw 2, and the expansion effect is better.

The nut 1 is screwed onto the threaded section 21 of the screw 2 and abuts against the outer end of the expansion member 3 shown in Figs. In order to make the assembly more reliable, this embodiment first sleeves the washer 4 on the threaded section 21 and then screws the nut 1.

When the invention is installed, the wall is bored, the expansion member 3 is first placed on the screw 2, and the bolt head 22 of the screw 2 is inserted into the pre-drilled wall hole, and then the external object is hung on the wall. On the screw 2, the washer 4 is placed on the screw 2, and finally, the nut 1 is screwed onto the threaded section 21 of the screw 2.

As shown in Fig. 4, the screw 2 is tightened, the expansion member 3 is pressed, and the distance between the expansion members 3 in the axial direction of the screw 2 is compressed, and the long teeth 31 slide on the surface of the short teeth 32, so that the long teeth The outer diameter of the curved surface of 31 is continuously increased, and the long toothed piece 31 is cut into the wall body, and the two sets of long tooth pieces 31 of the adjacent expansion member 3 form a relative cutting effect, so that the anchor bolt is subjected to the bidirectional force along the axis of the screw 2. The gripping force is greatly enhanced, the anchoring is firmer, and the seismic performance is greatly improved.

The above description is only one embodiment of the present invention, and is not a limitation on the design of the present case. Any equivalent changes made according to the design key of the present case fall within the scope of protection of the present case.

Claims

1. An anti-vibration anchor bolt consisting of a nut, a screw and at least two expansion members; the outer end of the screw has a threaded section and the inner end has a bolt head; and a plurality of expansion members are placed one by one on the threaded section of the screw; Screwed on the threaded section of the screw; characterized in that: the expansion member is a tubular member which is formed by rolling a sheet of material, and the opposite ends of the adjacent two expansion members form long and short teeth which intersect each other, and The ends of the long teeth are bent outward.

2. The anti-vibration type anchor according to claim 1, wherein the inner end of the expansion member of the bolt head extends to form a positioning bar, and the positioning bar is bent to form a positioning hook, and the positioning hook is hooked on the screw head of the screw. on.

3. The anti-vibration type anchor according to claim 2, wherein the positioning rod and the positioning hook of the expansion head corresponding to the side wall of the bolt head of the screw are provided with positioning grooves, and the positioning bar and the positioning hook are located in the positioning groove. .

4. An anti-vibration anchor according to claim 1, wherein a threaded section of the screw is first placed with a washer and then the nut is screwed.

5. A seismic anchor according to claim 1 wherein the bolt head is integrally formed on the screw.

6. A seismic anchor according to claim 1, wherein the bolt head and the screw are separately formed, and the bolt head is fixed to the screw.