CN103452992B - A kind of crab-bolt - Google Patents
A kind of crab-bolt Download PDFInfo
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- CN103452992B CN103452992B CN201310425888.9A CN201310425888A CN103452992B CN 103452992 B CN103452992 B CN 103452992B CN 201310425888 A CN201310425888 A CN 201310425888A CN 103452992 B CN103452992 B CN 103452992B
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- crab
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Abstract
The invention belongs to building field, be specifically related to a kind of crab-bolt, comprise crab-bolt head and the screw rod with screwing driving structure, described screw rod is provided with the first thread section away from one end of described crab-bolt head, and the screw thread of described first thread section is the self-taped type screw thread of indentation.Jagged self-taped type screw thread can effectively make crab-bolt cut the basis such as concrete, solid masonry and the ability of tapping internal thread is improved, and makes installation convenient and quick.Without the need to coordinating plastics or metal sleeve, the crab-bolt directly screwing in installation foundation avoids to lose efficacy to install and is not easy to be gone out by discernable by eye and the hidden danger that causes, and avoids because install error to occur the problem that anchor force is inadequate.And owing to have employed the structure of screw thread, can screw out crab-bolt very easily when dismantling, crab-bolt can reuse, and does not also damage the part that is fixed of required fixing body of wall or plank and so on.
Description
Technical field
The invention belongs to building field, particularly relate to a kind of crab-bolt.
Background technique
In building field, often can run into when two-part will be fixed up, especially often can run into that panel is installed, light partition wall is installed and floor installation etc. needs situation about rough ground and concrete being secured together.The main fixed structure of current employing is knocking type plastic anchor bolt.This crab-bolt comprises two structures, the sleeve pipe that the engineering plastics injection moulding such as first nylon, polypropylene or polyethylene is produced, and it two is screws with partial threads.Described sleeve pipe is roughly divided into two-part, and epimere is more smooth assembling set region, and hypomere is the dapple anchorage zone of band.The cross section of the worm tooth of described screw is asymmetric triangle, tilts to screw caudal directions, indentation.With this screw thread screw and be not suitable for and screw installation.
The anchoring effect of this knocking type plastic anchor bolt depends on the job specfication degree of setter to a great extent.Such as, if the degree of depth of pre-drilled is excessively dark, when hammering hammers into screw, sleeve pipe is not fixed on original position reliably, and the thread section part of screw is before clamp-oning sleeve pipe anchorage zone inner chamber completely, and sleeve pipe is brought into pre-drilled depths, make to only have part screw to clamp-on the inner chamber of anchorage zone, anchor force will be had a greatly reduced quality, and the installation of inefficacy is not easy gone out by discernable by eye and cause a hidden trouble.After this knocking type plastic anchor bolt installs, not quick detachable, the fragile part that is fixed after dismounting, and sleeve pipe can not be reused.
Summary of the invention
The invention provides a kind of crab-bolt, be intended to solve existing knocking type plastic anchor bolt and be not easy to dismounting, can not reuse and easily occur because of installation question the problem that anchor force is inadequate.
The present invention is achieved in that a kind of crab-bolt, and comprise crab-bolt head and screw rod with screwing driving structure, described screw rod is provided with the first thread section away from one end of described crab-bolt head, and the screw thread of described first thread section is the self-taped type screw thread of indentation.Jagged self-taped type screw thread makes installation more convenient and quick.Adopt the crab-bolt of jagged self-taped type screw thread to utilize thread engagement anchoring principle to avoid to lose efficacy to install and be not easy to be gone out by discernable by eye and the hidden danger that causes, and avoid because install error to occur the problem that anchor force is inadequate.And owing to have employed the structure of screw thread, can screw out crab-bolt very easily when dismantling, crab-bolt can reuse, and does not also damage the part that is fixed of required fixing body of wall or plank and so on.
Further, described first thread section is intensive secant formula thread section, and this jagged self-taped type screw thread through secant process adds a large amount of cutting edges, and thread cutting power is improved, and resistance is little, easier in concrete tapping internal thread.
Further, the first thread section sawtooth cutting edge threadingly asymmetric inclination of clockwise direction of described intensive secant formula, add the area of contact of cutting edge and pre-drilled inwall when being threaded into, the ability of crab-bolt tapping internal thread can be improved further, increase crab-bolt and screw in speed.
Further, between described first thread section and described crab-bolt head, be provided with the second thread section, have at least a screw thread to engage with the internal thread of described first thread section tapping in described second thread section, the crystallized ability of crab-bolt can be improved.
Further, described second thread section is the double-start thread comprising screw thread A and screw thread B, and described screw thread A is the smooth extension part of the jagged self-taped type screw thread of the first thread section, and the external diameter of described screw thread B is less than the external diameter of the first thread section.Screw thread B is inserted in the sand grains break flour of discharging when screw thread A cuts internal thread, effectively improves overall anchor force.
Further, the root diameter of the screw thread A of described first thread section and described second thread section all will be slightly less than the diameter of the pre-drilled that crab-bolt is installed.The external diameter of the screw thread B of described second thread section is suitable with the pre-drilled diameter installing crab-bolt, before the screw thread B of whole piece second thread section ends at the first thread section.In installation process, the screw thread B of the second thread section itself does not play the effect such as tapping and thread engagement, but is inserted in the sand grains break flour of discharging when the second thread section screw thread A cuts internal thread, effectively improves overall anchor force.
Further, described screw thread A is the Thread Forming TF type design that pitch is widened, and the pitch comparing the NBS Thread Forming TF of same nominal diameter increases 150% ~ 180%, and worm tooth angle is 60 degree.Widely-pitched design adds screw-in helical pitch on the one hand, and installation rate is improved; On the other hand, the sand grains break flour of discharging in enough space internal thread cutting processes is also left between tooth line.
Further, described screw rod is also provided with level and smooth polished rod section, and described polished rod section is positioned between described second thread section and described crab-bolt head.
Further, described crab-bolt head is countersunk head type, crab-bolt head can be made to imbed and be fixed in part.
Further, the supporting surface of described crab-bolt head is provided with at least one fin, and when crab-bolt screws installation, fin can play scraping reaming effect.
Further, described fin circular array is evenly arranged in the supporting surface of described crab-bolt head and its cross section is trapezoidal, can improve the scraping reaming effect of fin, make crab-bolt head more easily imbed the surface of fixation.
Further, described screw rod is provided with the afterbody of frustum type away from crab-bolt head one end.The afterbody of frustum type can retain the screw-in guiding function of afterbody, and adds effective length of action of screw thread to greatest extent simultaneously.
Further, described frustum is 12 ~ 18 degree, and the tail end section of frustum is natural circle, and its diameter is 75% of the bore dia that crab-bolt is installed.
The present invention adopts such technological scheme, and its beneficial effect is: the ability that jagged self-taped type screw thread can make crab-bolt cut tapping internal thread is effectively improved, and makes installation convenient and quick.Adopt the crab-bolt of jagged self-taped type screw thread to utilize thread engagement anchoring principle, avoiding lost efficacy installs and is not easy to be gone out by discernable by eye and the hidden danger that causes, and avoids because install error to occur the problem that anchor force is inadequate.And owing to have employed the structure of screw thread, can screw out crab-bolt very easily when dismantling, crab-bolt can reuse, and does not also damage the part that is fixed of required fixing body of wall or plank and so on.
Accompanying drawing explanation
Fig. 1 is the crab-bolt schematic diagram that the embodiment of the present invention 1 provides;
Fig. 2 is the crab-bolt structural representation that the embodiment of the present invention 2 provides;
Fig. 3 is the A-A cross-sectional view of the crab-bolt that the embodiment of the present invention 2 provides;
Fig. 4 is the protruding rib close-up schematic view of the crab-bolt that the embodiment of the present invention 2 provides;
Fig. 5 is screw thread A and the screw thread B structure for amplifying schematic diagram of the crab-bolt that the embodiment of the present invention 2 provides;
Fig. 6 is the B-B cross-sectional view of the crab-bolt that the embodiment of the present invention 2 provides.
Embodiment
With reference to the accompanying drawings and in conjunction with lay in construction rough ground be typical example describe in detail embodiments of the present invention.In addition, the present invention is not limited to the mode of execution of following explanation.
Embodiment 1:
Consulting shown in Fig. 1, a kind of crab-bolt, comprising crab-bolt head 1 and screw rod with screwing driving structure, described screw rod is provided with jagged self-taped type screw thread 4 away from one end of crab-bolt head 1, and polished rod section 6 is located between crab-bolt head 1 and jagged self-taped type screw thread 4.Jagged self-taped type screw thread 4 can cut tapping internal thread, make installation more convenient and quick, and owing to have employed the structure of screw thread, crab-bolt can screw out very easily when dismantling, thus reuse crab-bolt, and do not damage the part that is fixed as plank, body of wall and so on.
Embodiment 2:
Consult shown in Fig. 2 to Fig. 6, a kind of crab-bolt, comprise crab-bolt head 1 and screw rod with screwing driving structure, described crab-bolt head 1 is countersunk head type.
The supporting surface of crab-bolt head 1 is provided with fin 7, and when crab-bolt screws installation, fin 7 can play scraping reaming effect.
Fin 7 circular array is evenly arranged in the supporting surface of crab-bolt head 1, and the cross section of fin 7 is trapezoidal, the scraping reaming effect of fin 7 can be improved, make crab-bolt head 1 finally can imbed rough ground easily, make the surface of crab-bolt head 1 equal with the surface of rough ground, or slightly lower than the surface of rough ground, be unlikely to the laying of the panel, floor etc. affected on rough ground.
The end of crab-bolt head 1 (this specification if no special instructions, all using respective structural sections near crab-bolt head one end as top, near crab-bolt afterbody one end as end) be provided with level and smooth polished rod section 6, this structural sections smooth surface.The length of polished rod section 6 is different according to its product overall length difference of crab-bolt of different model, but screw thread overall length is changeless.This to screw in the pre-drilled on concrete completely, and by the length of action of the internal thread of tapping in reach i.e. crab-bolt outside thread and pre-drilled, its length is determined according to designing anchor force.And the length of polished rod section 6 must be applicable to the different-thickness of rough ground on same installation foundation, or be applicable to needs and borrow rough ground after plain cushion height to add the total thickness of booster material.
The end of the polished rod section 6 of crab-bolt is provided with double-start thread, comprises screw thread A2 and screw thread B3.The end of double-start thread is provided with jagged self-taped type screw thread 4, and the internal thread of jagged self-taped type screw thread 4 tapping engages with screw thread A2.
The tooth angle of screw thread A2 is 60 degree, belong to self tapping class screw thread, but pitch ratio increases 150% ~ 180% with the pitch of the NBS Thread Forming TF of nominal diameter, widely-pitched design adds lead of screw thread (often screwing the distance that 360 degree of crab-bolts are advanced) on the one hand, improve the speed of shooting, shorten installation process, meanwhile, between tooth line, also leave the sand grains break flour of discharging in enough space internal thread cutting processes.
Described crab-bolt needs to arrange pre-drilled on concrete, solid masonry before using.The diameter of pre-drilled is less than the external diameter of screw thread A2 simultaneously slightly larger than the external diameter of screw thread B3.Before screw thread B3 ends at jagged self-taped type screw thread 4.In anchoring procedure, screw thread B3 itself does not play the effect such as tapping and thread engagement, but is inserted in the sand grains break flour of discharging when screw thread A2 cuts internal thread, effectively improves overall anchor force.
The cross section of jagged self-taped type screw thread 4 is that multiple-cutting-edge mouth is asymmetric jagged, and jagged self-taped type screw thread 4 adds a large amount of cutting edges through secant process, and the threadingly asymmetric inclination of screw-in direction of sawtooth cutting edge, namely tilt to clockwise direction, make crab-bolt at the beginning of screwing in the pre-drilled in concrete or masonry basis, hole wall tapping can be cut fast in order to engage the internal thread of anchoring.
The end of jagged self-taped type screw thread 4 is provided with the afterbody 5 of frustum type, and the angle of frustum is at 12 ~ 18 degree, and the end cross section of frustum is the circle of a self-assembling formation, and its intended diameter is 75% of the diameter in the hole that crab-bolt is installed.Frustum design remains the guiding function of afterbody when crab-bolt screws in, but increases effective length of action to greatest extent simultaneously, makes crab-bolt obtain sufficiently high thread engagement anchor force in the installation occasion of shallow overburden.
The driving structure that screws of the described crab-bolt head 1 with screwing driving structure can for screwing driver slot, and this screws driver slot can be the groove of common cross recess, interior hex shaped groove, interior hexagonal flower shape groove or other type.
To install rough ground in construction, the method for construction of the crab-bolt that the embodiment of the present invention 2 provides is as follows:
The step one of method of construction utilizes the electric tools such as electric hammer directly to carry out pre-drilled together with rough ground and concrete foundation, namely be first complete a pre-drilled in the position of an isolated edge 5-10cm of long strip rough ground, and the crab-bolt using electric tool an embodiment of the present invention 2 to be provided screws in pre-drilled, and stop screwing after jagged self-taped type screw thread 4 screws in concrete foundation completely with screw thread A2.Then this operation is repeated in the other end of rough ground.After completing this step operation, the trace that rough ground can do above-below direction in the direction perpendicular to concrete foundation surface moves, but can not move along the direction parallel with concrete foundation surface.
The step 2 of method of construction completes on the rough ground tentatively fixed at two, carrying out pre-drilled every 30-50cm, and screw in crab-bolt till jagged self-taped type screw thread 4 screws in after concrete foundation with screw thread A2 completely.
The step 3 of method of construction be whole piece rough ground complete preliminary fixing after, it is levelling to carry out rough ground.Needing padded position, rough ground being tilted slightly, and below rough ground, is encased inside horizontal liner wood chip.
The step 4 of method of construction be levelling borrow flat after whole piece rough ground, disposablely crab-bolts all on rough ground is screwed to the end, until the surface of crab-bolt head 1 is equal with rough ground surface or surperficial lower than rough ground.
In sum, adopt the crab-bolt of jagged self-taped type screw thread to utilize thread engagement anchoring principle, avoiding lost efficacy installs and is not easy to be gone out by discernable by eye and the hidden danger that causes, and avoids because install error to occur the problem that anchor force is inadequate.And owing to have employed the structure of screw thread, can screw out crab-bolt very easily when dismantling, crab-bolt can reuse, and does not also damage the part that is fixed of required fixing body of wall or plank and so on.And the widely-pitched design of screw thread A, add screw-in helical pitch, installation rate is improved, and between tooth line, also leave the sand grains break flour of discharging in enough space internal thread cutting processes; Screw thread B can be inserted in the sand grains break flour of discharging when screw thread A cuts internal thread, effectively improves overall anchor force.Because knocking type plastic anchor bolt comprises two structures, its manufacture cost is higher, and crab-bolt provided by the invention only has a structure, and manufacture cost is lower.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a crab-bolt, is characterized in that: comprise crab-bolt head and the screw rod with screwing driving structure, described screw rod is provided with the first thread section away from one end of described crab-bolt head, and the screw thread of described first thread section is the self-taped type screw thread of indentation;
Be provided with the second thread section between described first thread section and described crab-bolt head, in described second thread section, have at least a screw thread to engage with the internal thread of described first thread section tapping;
Described second thread section is the double-start thread comprising screw thread A and screw thread B, and described screw thread A is the smooth extension part of the jagged self-taped type screw thread of the first thread section, and the external diameter of described screw thread B is less than the external diameter of the first thread section; The described first thread section sawtooth cutting edge threadingly asymmetric inclination of clockwise direction;
The pitch of described screw thread A widens 150% ~ 180% with the pitch of the NBS Thread Forming TF of nominal diameter relatively;
The tooth angle of described screw thread A is 60 degree;
The cross section of the self-taped type screw thread of described indentation is the asymmetric flexuose of multiple-cutting-edge mouth;
The described driving structure that screws for screwing driver slot, described in screw driver slot be cross recess or interior hex shaped groove.
2. crab-bolt according to claim 1, is characterized in that: described screw rod is also provided with level and smooth polished rod section, and described polished rod section is positioned between described second thread section and described crab-bolt head.
3. crab-bolt according to claim 1, is characterized in that: described crab-bolt head is countersunk head type, and the supporting surface of described crab-bolt head is provided with at least one fin.
4. crab-bolt according to claim 3, is characterized in that: described fin circular array and be evenly arranged in the supporting surface of described crab-bolt head, and the cross section of described fin is trapezoidal.
5. the crab-bolt according to any one of Claims 1-4, is characterized in that: described screw rod is provided with the afterbody of frustum type away from described crab-bolt head one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310425888.9A CN103452992B (en) | 2013-09-17 | 2013-09-17 | A kind of crab-bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310425888.9A CN103452992B (en) | 2013-09-17 | 2013-09-17 | A kind of crab-bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103452992A CN103452992A (en) | 2013-12-18 |
| CN103452992B true CN103452992B (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310425888.9A Expired - Fee Related CN103452992B (en) | 2013-09-17 | 2013-09-17 | A kind of crab-bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103452992B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5190426A (en) * | 1992-03-02 | 1993-03-02 | Illinois Tool Works Inc. | Concrete fastener |
| CN1264795A (en) * | 1999-02-23 | 2000-08-30 | A-Z装备与配件股份有限及两合公司 | Countersunk screwnail |
| CN1400402A (en) * | 2001-07-31 | 2003-03-05 | 伊利诺斯器械工程公司 | Multiple matching fastener |
| CN1978924A (en) * | 2005-12-07 | 2007-06-13 | 阿图尔-费希尔股份公司费希尔厂 | Thread tapping screw, in particular concrete screw |
| CN1987132A (en) * | 2005-12-22 | 2007-06-27 | 原生资源建筑物产品股份有限公司 | Dual threaded screw for composite materials |
| EP1872021A1 (en) * | 2005-04-16 | 2008-01-02 | fischerwerke Artur Fischer GmbH & Co. KG | Thread-cutting masonry screw |
| CN201034105Y (en) * | 2007-03-28 | 2008-03-12 | 上海市紧固件和焊接材料技术研究所 | Self-tapping locking screw |
| CN203500230U (en) * | 2013-09-17 | 2014-03-26 | 上海美固澄梵紧固件有限公司 | Anchor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITNA20090028U1 (en) * | 2009-10-27 | 2011-04-28 | Tecfi S P A | "SCREW FOR CONCRETE WITH DOUBLE THREADING" |
-
2013
- 2013-09-17 CN CN201310425888.9A patent/CN103452992B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5190426A (en) * | 1992-03-02 | 1993-03-02 | Illinois Tool Works Inc. | Concrete fastener |
| CN1264795A (en) * | 1999-02-23 | 2000-08-30 | A-Z装备与配件股份有限及两合公司 | Countersunk screwnail |
| CN1400402A (en) * | 2001-07-31 | 2003-03-05 | 伊利诺斯器械工程公司 | Multiple matching fastener |
| EP1872021A1 (en) * | 2005-04-16 | 2008-01-02 | fischerwerke Artur Fischer GmbH & Co. KG | Thread-cutting masonry screw |
| CN1978924A (en) * | 2005-12-07 | 2007-06-13 | 阿图尔-费希尔股份公司费希尔厂 | Thread tapping screw, in particular concrete screw |
| CN1987132A (en) * | 2005-12-22 | 2007-06-27 | 原生资源建筑物产品股份有限公司 | Dual threaded screw for composite materials |
| CN201034105Y (en) * | 2007-03-28 | 2008-03-12 | 上海市紧固件和焊接材料技术研究所 | Self-tapping locking screw |
| CN203500230U (en) * | 2013-09-17 | 2014-03-26 | 上海美固澄梵紧固件有限公司 | Anchor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103452992A (en) | 2013-12-18 |
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Effective date of registration: 20190726 Address after: 201419 No. 25 Baisha Road, Xinghuo Development Zone, Fengxian District, Shanghai Patentee after: Shanghai Meigu Handway Hardware Co.,Ltd. Address before: 201419 No. 25 Baisha Road, Xinghuo Development Zone, Fengxian District, Shanghai Patentee before: SHANGHAI MOREGOOD C&F FASTENER Co.,Ltd. |
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Granted publication date: 20160120 Termination date: 20210917 |
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| CF01 | Termination of patent right due to non-payment of annual fee |