CN101694226B - Anchor bolt - Google Patents

Abstract

The invention discloses an anchor bolt which comprises a nut, a screw rod and an expansion part. A threaded section is arranged at the outer end of the screw rod, and a bolt head is arranged at the inner end of the screw rod; the expansion part is in a tubular shape, a plurality of expansion holes which guide the expansion part to generate expansion and deformation are radially arranged on the tube wall, an expansion slice is formed between every two adjacent expansion holes at the each row, the expansion part is sleeved on the screw rod, and the inner end of the expansion part supports against the bolt head; and the nut is screwed on the threaded section and supports against the outer end of the expansion part. The anchor bolt has the advantages of favorable anchoring efficacy, little component, simple structure as well as simple and convenient processing and manufacture.

Description

A kind of crab-bolt

Technical field

The invention belongs to the technical field of building anchor bolt, particularly a kind of building anchor bolt.

Background technique

Traditional building anchor bolt as shown in Figure 1, formed by nut 100, screw rod 200 and expansion piece 300, the inner end of screw rod 200 has sphenocephaly 201, expansion piece 300 in a tubular form and the inner end have intumescent sheet 301, expansion piece 300 is enclosed within on the screw rod 200, its intumescent sheet 301 is against on the sphenocephaly 201, and nut 100 swivel nuts are in the outer end of screw rod 200.

During installation, the screw rod 200 that is with expansion piece 300 is inserted in the good porthole of brill, again plug-in thing is hung on the outer end of screw rod 200, then, nut 100 swivel nuts on screw rod 200, are pushed expansion piece 300 by screwing nut 100 in porthole, make inner end intumescent sheet 301 distending under the guiding of sphenocephaly 201 of expansion piece 300, hold on to the inwall of porthole, and make whole crab-bolt be fixed in the porthole, reach plug-in thing is fixed on architectural purpose.

Above-mentioned crab-bolt is because the number of the intumescent sheet 301 of expansion piece 300 is few, little with the surface of contact of porthole, the grasp deficiency, particularly use in the hollow brick body, occur intumescent sheet 301 easily and be in situation in the hole just, as Figure 1-1, cause anchoring invalid, so fixed effect is poor, be eliminated gradually.

In the prior art, a kind of crab-bolt is arranged as shown in Figure 2, formed by nut 10, screw rod 20 and at least two expansion pieces 30, screw rod 20 has thread section 210 and bolt head 220, nut 10 is screwed on this thread section 210, and several expansion pieces 30 are nested with one by one on the thread section 210 of screw rod 20, and the same end of each expansion piece 30 forms several intumescent sheets 310, the corresponding adjacent intumescent sheet 310 of the other end then forms sphenoid surface 320, and nut 10 or screw rod 20 corresponding intumescent sheets 310 also can form sphenoid surface.

During installation, several expansion pieces 30 are nested with on the thread section 210 of screw rod 20, and nut 10 is spun on the thread section 210 of screw rod 20, again plug-in thing is hung on screw rod 20 by on the position of bolt head 220, then, with nut 10 inwardly, together with expansion piece 30, screw rod 20 inserts in the pre-drilled porthole together, screws screw rod 20, perhaps with bolt head 220 inwardly, together with expansion piece 30, screw rod 20 inserts in the pre-drilled porthole together, screw nut 10, can make intumescent sheet 310 distending under the guiding of sphenoid surface 320, hold on to the inwall of porthole, and make whole crab-bolt be fixed in the porthole, reach plug-in thing is fixed on architectural purpose.

This crab-bolt is because the increase of expansion piece 30 makes the number multiplication of intumescent sheet 310, also doubles with the surface of contact of porthole, and grasp improves greatly, so good fixing effect is now by extensively in construction.

But this crab-bolt is because need be nested with a plurality of expansion pieces 30, and each expansion piece 30 must form intumescent sheet 310 and sphenoid surface 320, nut 10 or screw rod 20 corresponding intumescent sheets 310 also will form sphenoid surface, so, exist member many, complex structure, shortcomings such as processing trouble.

In view of this, the inventor develops a kind of novel crab-bolt, with simplified structure, reduces member, convenient processing, and effectively anchoring, this case produces thus.

Summary of the invention

The object of the present invention is to provide a kind of crab-bolt, it has good anchoring effect, and member is few, and is simple in structure, and processing and fabricating is simple, convenient.

A kind of crab-bolt is made up of nut, screw rod and expansion piece; The outer end of screw rod has thread section and the inner end has bolt head; Expansion piece in a tubular form, some rows that radially have of tube wall guide the inflation port that expansion piece expands distortion, form intumescent sheet between every row's the adjacent inflation port, expansion piece is nested with on screw rod, and the inner end is against on the bolt head; Nut driving and is against on the outer end of expansion piece on thread section.

Wherein, the inflation port on the described expansion piece is axial strip hole.

The two ends of described inflation port form the enlarging that is beneficial to the intumescent sheet distortion.

Have the aperture that is beneficial to the intumescent sheet distortion on the intumescent sheet of described expansion piece.

The inner end of described expansion piece extends to form positioning strip, and positioning strip is bent to form location hook, and this location hook colludes on the bolt head of screw rod.

Described expansion piece is to curl into tubulose by a sheet material, and the sheet material upper punch is shaped on inflation port, intumescent sheet, aperture and positioning strip.

Positioning strip and the location hook of corresponding expansion piece have locating slot on the bolt head sidewall of described screw rod, and positioning strip and location hook are in the locating slot.

Described screw flight Duan Shangxian is nested with a packing ring and screws nut again.

Described bolt head is one-body molded on screw rod.

Described bolt head and screw rod divide body formed, and bolt head is fixed on the screw rod.

After adopting said structure, when the present invention installs, hole at body of wall, expansion piece is enclosed within on the screw rod, and the bolt head with screw rod is inserted in the pre-drilled porthole, then inwardly again, plug-in thing is hung on the screw rod, at last, nut is spun on the screw flight section, expansion piece is squeezed in inflation port and intumescent sheet place deform, intumescent sheet to around distending, hold on to the inwall of porthole, and make whole crab-bolt be fixed in the porthole, reach plug-in thing is fixed on architectural purpose.

The present invention makes the surface of contact multiplication of expansion piece and porthole because number row intumescent sheet is arranged, and grasp improves greatly, so, good fixing effect.And, the present invention replaces a plurality of expansion piece of the prior art by a tubulose expansion piece that has many row's intumescent sheets simultaneously, member significantly reduces, structure is simplified, processing is simple, convenient, when particularly adopting sheet material to curl to make tubulose because inflation port, intumescent sheet, aperture and positioning strip etc. all can be on sheet material direct punch forming, processing and fabricating is more prone to.

Description of drawings

Fig. 1 is the structural representation of traditional architecture crab-bolt;

Fig. 1-the 1st, the invalid anchoring schematic representation when the traditional architecture crab-bolt applies to the hollow brick body;

Fig. 2 is the structural representation of existing building crab-bolt;

Fig. 3 is structural representation of the present invention;

Fig. 4 is decomposing schematic representation of the present invention;

Fig. 5 is the expansion schematic representation of expansion piece of the present invention;

Fig. 6 is the effective anchoring schematic representation of the present invention when applying to the hollow brick body.

Label declaration

Nut 100

Screw rod 200 sphenocephalies 201

Expansion piece 300 intumescent sheets 301

Nut 10

Screw rod 20 thread sections 210

Bolt head 220

Expansion piece 30 intumescent sheets 310

Sphenoid surface 320

Nut 1

Screw rod 2 thread sections 11

Bolt head 22 locating slots 23

Expansion piece 3 inflation port 31

Intumescent sheet 32 apertures 33

Positioning strip 34 location hooks 35

Enlarging 36

Packing ring 4

Embodiment

As shown in Figure 3 and Figure 4, be preferred embodiment of the present invention, formed by nut 1, screw rod 2 and expansion piece 3.

The outer end of screw rod 2 has thread section 21 and the inner end has bolt head 22.Bolt head 22 can be one-body molded on screw rod 2, is fixed on the screw rod 2 after perhaps body formed with screw rod 2 minutes again.

Expansion piece 3 in a tubular form, some rows that radially have of tube wall guide the inflation port 31 that expansion piece 3 expands distortion, inflation port 31 is axial strip hole among this embodiment.Form intumescent sheet 32 between every row's the adjacent inflation port 31, in order to be beneficial to intumescent sheet 32 distortion, also have aperture 33 on the intumescent sheet 32, and the two ends of inflation port 31 also form enlarging 36.Expansion piece 3 is nested with on screw rod 2, and the inner end is against on the bolt head 22.Can expand rapidly after expansion piece 3 is squeezed, avoid expansion piece 3 and screw rod 2 to relatively rotate, the inner end of expansion piece 3 also extends to form positioning strip 34, and positioning strip 34 is bent to form location hook 35, and this location hook 35 colludes on the bolt head 22 of screw rod 2.And, positioning strip 34 and the location hook 35 of this embodiment corresponding expansion piece 3 on bolt head 22 sidewalls of screw rod 2 have locating slot 23, positioning strip 34 and location hook 35 are in the locating slot 23, and the inner end of expansion piece 3 and the bolt head 22 of screw rod 2 are fixed, and expansion effect is better.For convenience of processing and fabricating, as shown in Figure 5, this embodiment's expansion piece 3 is to curl into tubulose by a sheet material, and the sheet material upper punch is shaped on inflation port 31, intumescent sheet 32, aperture 33 and positioning strip 34.

Nut 1 is screwed on the thread section 21 of screw rod 2, and is against on the outer end of expansion piece 3.More reliable in order to assemble, this embodiment is nested with a packing ring 4 earlier and screws nut 1 again on thread section 21.

When the present invention installs, hole at body of wall, earlier expansion piece 3 is enclosed within on the screw rod 2, bolt head 22 with screw rod 2 is inserted in the pre-drilled porthole inwardly again, then, plug-in thing is hung on the screw rod 2, packing ring 4 is nested with on screw rod 2, last, nut 1 is spun on the thread section 21 of screw rod 2.Screw screw rod 2, expansion piece 3 is squeezed, two ends in inflation port 31 produce distortion, some row's intumescent sheets 32 outwards strut simultaneously, particularly under the guiding of aperture 33 and enlarging 36, expand rapidly, intumescent sheet 32 to around distending, hold on to the inwall of porthole, and make whole crab-bolt be fixed in the porthole, reach plug-in thing is fixed on architectural purpose.

Again as shown in Figure 6, if the present invention is when applying to the hollow brick body, after each is arranged intumescent sheet 32 and struts simultaneously, always there is demi-inflation sheet 32 can drop on outside the hole, like this, effectively contact with the entity part of hollow brick body by this part intumescent sheet 32, can guarantee the validity of the present invention's anchoring in the hollow brick body.

The above is one embodiment of the present of invention only, is not the restriction to this case design, and all equivalent variations of doing according to the design key of this case all fall into the protection domain of this case.

Claims (8)

1. a crab-bolt is made up of nut, screw rod and expansion piece; The outer end of screw rod has thread section and the inner end has bolt head; It is characterized in that: expansion piece in a tubular form, some rows that radially have of tube wall guide the inflation port that expansion piece expands distortion, form intumescent sheet between every row's the adjacent inflation port, expansion piece is nested with on screw rod, and the inner end is against on the bolt head; Nut driving and is against on the outer end of expansion piece on thread section; The inner end of expansion piece is extended and is also formed positioning strip, and positioning strip is bent to form location hook, and this location hook colludes on the bolt head of screw rod; Positioning strip and the location hook of corresponding expansion piece have locating slot on the bolt head sidewall of screw rod, and positioning strip and location hook are in the locating slot.

2. a kind of crab-bolt as claimed in claim 1, it is characterized in that: the inflation port on the described expansion piece is axial strip hole.

3. a kind of crab-bolt as claimed in claim 1 is characterized in that: the two ends of described inflation port form the enlarging that is beneficial to the intumescent sheet distortion.

4. a kind of crab-bolt as claimed in claim 1 is characterized in that: have the aperture that is beneficial to the intumescent sheet distortion on the intumescent sheet of described expansion piece.

5. a kind of crab-bolt as claimed in claim 1, it is characterized in that: described expansion piece is to curl into tubulose by a sheet material, and the sheet material upper punch is shaped on inflation port, intumescent sheet, aperture and positioning strip.

6. a kind of crab-bolt as claimed in claim 1, it is characterized in that: described screw flight Duan Shangxian is nested with a packing ring and screws nut again.

7. a kind of crab-bolt as claimed in claim 1, it is characterized in that: described bolt head is one-body molded on screw rod.

8. a kind of crab-bolt as claimed in claim 1, it is characterized in that: described bolt head and screw rod divide body formed, and bolt head is fixed on the screw rod.

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