CN102282378A

CN102282378A - Anchor

Info

Publication number: CN102282378A
Application number: CN200980154632.0A
Authority: CN
Inventors: 阿瑟.费希尔
Original assignee: Fischerwerke GmbH and Co KG
Current assignee: Fischerwerke GmbH and Co KG
Priority date: 2009-01-15
Filing date: 2009-12-12
Publication date: 2011-12-14
Anticipated expiration: 2029-12-12
Also published as: DE102009009422A1; WO2010081513A1; EP2376792A1; CN102282378B

Abstract

The invention relates to a simple cylindrical anchor (1) having a screw (9) for spreading the anchor (1) and comprising a hole (2) having a stepped diameter (3) and divided by slits (4) into spreading tabs (5) extending over about 3/4 of the length of the anchor (1). The largest diameter step (3) provides axial resistance to the screw (9) in the anchor (1), allowing the anchor (1) to be driven in with the screw (9). The diametrical steps (3) bring about good drive of the screw (9) when screwing in under slowly increasing screw torque. The diametrical steps (3) further bring about a large spreading of the anchor (1) at a depth in an anchorage.

Description

EXPANSION ANCHOR BOLTS

Technical field

The present invention relates to a kind of EXPANSION ANCHOR BOLTS with claim 1 preamble feature.

Background technique

By patent US 5,221,167 known EXPANSION ANCHOR BOLTS, it can expand by the bump pin and also can be anchored thus in the inside, lower margin basis.Known EXPANSION ANCHOR BOLTS be tubulose and have and vertically go up penetrating hole, can clash into pin therein.The hole is shunk by two ring steps in the front end position of EXPANSION ANCHOR BOLTS and have two cross one another, as to cross EXPANSION ANCHOR BOLTS slits in the axial plane of this position in EXPANSION ANCHOR BOLTS, and they are divided into four spreading tenons with the EXPANSION ANCHOR BOLTS in the position, slit.The position of cracking, have the spreading tenon is called the spreading position here.The spreading position known EXPANSION ANCHOR BOLTS length about 20% on extend.

Summary of the invention

The objective of the invention is, advise simple and can price advantageously a process EXPANSION ANCHOR BOLTS.

This purpose is achieved by the feature of claim 1 according to the present invention.According to EXPANSION ANCHOR BOLTS of the present invention is not the bolt that nail expands, but the bolt that screw expands, and it is by screwing in screw to best penetrating and at the inside, the vertical upwardly extending hole of EXPANSION ANCHOR BOLTS spreading.It can make object pass through screw, the hidden danger that does not exist screw to pull out from EXPANSION ANCHOR BOLTS.Be applicable to that according to EXPANSION ANCHOR BOLTS of the present invention plug-in mounting joins, that is, be applicable to that passing the object that will be fixed is placed in EXPANSION ANCHOR BOLTS and is anchored the inside, basis.The front end lead of screw thread of screw embeds EXPANSION ANCHOR BOLTS and guarantees reliably that thus screw is fed into the narrower section the inside, hole that each is connected in EXPANSION ANCHOR BOLTS on the diameter step in the hole respectively when screwing in screw to the EXPANSION ANCHOR BOLTS the inside.Screw-in power is little when beginning and increases along with the spreading from the hole section to the hole section.Because in EXPANSION ANCHOR BOLTS mesopore hole section up front is the narrowest, therefore spreading is the strongest there, promptly, followingly on the surface play the effect of spreading the most consumingly being anchored basic internal, that avoids thus that power forms on the boring inlet in being anchored the basis splits and is anchored well inside the degree of depth that is anchored the basis.

Make according to EXPANSION ANCHOR BOLTS of the present invention slit also spreading tenon and spreading position to be extended on greater than half length of EXPANSION ANCHOR BOLTS, realize comparing relative thus than short EXPANSION ANCHOR BOLTS with the spreading span access location length.The stepped portions in hole is also extended on greater than half length of EXPANSION ANCHOR BOLTS, be used to realize compare big spreading length with EXPANSION ANCHOR BOLTS length.Preferably make the slit until the maximum diameter position of EXPANSION ANCHOR BOLTS mesopore.

Expansion structure regulation of the present invention, described screw are beyond the spreading position of cracking of EXPANSION ANCHOR BOLTS or have axial fulcrum on the maximum diameter step, and it can clash into EXPANSION ANCHOR BOLTS to the inside, hole that is anchored the basis by screw.Described EXPANSION ANCHOR BOLTS can by bump join EXPANSION ANCHOR BOLTS not the screw head of the screw of vent portion the inside be driven into and be anchored the inside, basis.EXPANSION ANCHOR BOLTS is struck by the component that will be fixed be anchored the inside, basis, and need not long like this EXPANSION ANCHOR BOLTS, make it pass its whole thickness and wear the component that will be fixed thoroughly at the arrangement state.Can in joining, saturating plug-in mounting use EXPANSION ANCHOR BOLTS by the component for different-thickness thus.Screwing in screw later in the bump EXPANSION ANCHOR BOLTS also makes EXPANSION ANCHOR BOLTS spreading and anchor be anchored the inside, basis thus.Embodiments of the invention can make EXPANSION ANCHOR BOLTS pass component by screw in saturating plug-in mounting timing and strike and be anchored the inside, basis, if the bore dia in component less than the bore dia that is anchored in the basis in.An example to this is interruptedly not hole in as stone that is anchored the basis or concrete with having in addition by diamond bit boring in as one section timber of the object that will be fixed.Often keep diameter at this aperture in one section timber than the Kong Gengxiao in stone or concrete.However, screw is being enough to make EXPANSION ANCHOR BOLTS pass one section timber or the component that generally will be fixed strike and are anchored the inside, basis by screw according to the axial restraint on the Kongzui major diameter step in the EXPANSION ANCHOR BOLTS of the present invention.

In preferred development structure of the present invention, described EXPANSION ANCHOR BOLTS has two spreading tenons, and they can be considered as the semicolumn hull shape.Screw thread is being screwed into EXPANSION ANCHOR BOLTS when the inside and when screw thread cuts to EXPANSION ANCHOR BOLTS spreading tenon the inside, makes hidden danger that the spreading tenon the separates spreading tenon less than a greater number that extends for the spreading tenon of the lesser amt that extends on than the big circumference section on less circumferential segment.

The hole section that forms the diameter step especially has essentially identical length, that is, the diameter step has essentially identical axial distance each other.The not vent portion of described EXPANSION ANCHOR BOLTS be the diameter step axial distance that mutually is connected pact half to about twice, promptly the not vent portion length of EXPANSION ANCHOR BOLTS is in half about twice extremely of the pact of the hole section of the formation diameter step that vertically passes EXPANSION ANCHOR BOLTS.That is, not vent portion compare with EXPANSION ANCHOR BOLTS length relative shorter, it be significantly less than on half length of EXPANSION ANCHOR BOLTS, for example EXPANSION ANCHOR BOLTS length about 1/3 to 1/5 on extend.Because the diameter step and when EXPANSION ANCHOR BOLTS for example is divided into two or four spreading tenons screw when screwing in, guide well, the hidden danger in outstanding slit, side also is small even replace screw spreading spreading tenon thus in EXPANSION ANCHOR BOLTS section short, that do not crack.

Verified, the EXPANSION ANCHOR BOLTS of spreading fixing bigger in being anchored the basis even several times ground is bigger is when if described screw screws in sizable core diameter and corresponding less thread depth.Expansion structure regulation therefore of the present invention, screw has the thread depth of about 0.5mm.Thread depth is the radial distance that pushes up thread core from screw thread.The thread core diameter of screw is equal to or greater than the aperture of maximum diameter step back in EXPANSION ANCHOR BOLTS, the promptly second largest aperture substantially.

Expansion structure regulation of the present invention, the foremost diameter step in the hole in EXPANSION ANCHOR BOLTS is positioned at the EXPANSION ANCHOR BOLTS mid-length substantially.On this half length of minimum diameter segment base of this expansion structure mesopore of the present invention, extend in EXPANSION ANCHOR BOLTS.This expansion structure of the present invention has obtained in test the well secured value of EXPANSION ANCHOR BOLTS in being anchored the basis of spreading.

The not vent portion that expansion structure of the present invention is defined in EXPANSION ANCHOR BOLTS has outwards outstanding projection.This projection can be made of muscle.Their resist EXPANSION ANCHOR BOLTS and rotate together when screwing in screw, especially when the hole of placing EXPANSION ANCHOR BOLTS because when for example the hole error has sizable diameter.It is essential preventing to rotate together when beginning to screw in, and makes screw screw in a segment distance, and spreading prevents that EXPANSION ANCHOR BOLTS from rotating together.

The hollow projection of improvement project regulation of the present invention, muscle that is for example crooked or V-arrangement.Hollow projection can be with the outside roof pressure EXPANSION ANCHOR BOLTS of quite small power, although make the EXPANSION ANCHOR BOLTS projection also can join the inside, hole of minor diameter with suitable power thus.

Expansion structure regulation of the present invention, described projection is opened wide towards the EXPANSION ANCHOR BOLTS inner side surface.Described projection can be made EXPANSION ANCHOR BOLTS join narrow boring the inside easily by the inside slightly roof pressure of narrow boring thus.However, projection prevents that EXPANSION ANCHOR BOLTS from rotating together and is slightly less than projection in the sealing of EXPANSION ANCHOR BOLTS inner side surface when screw is screwed into wide boring the inside, and wherein the peripheral wall of EXPANSION ANCHOR BOLTS also constitutes continuously.Another advantage towards the unlimited projection of EXPANSION ANCHOR BOLTS inner side surface is more easily to process injection mould and the EXPANSION ANCHOR BOLTS demoulding more easily after injection moulding that is used to process EXPANSION ANCHOR BOLTS for hollow projection.

Expansion structure regulation of the present invention, described spreading tenon interconnects by theoretical disconnected position on its front end.The position, rear end that front end does not crack away from EXPANSION ANCHOR BOLTS is passed it and is added screw.Theoretical disconnected position means this connection, and they preferably weaken, disconnect when screwing in screw and spreading tenon spreading as thin-walled, cutting or similar structure by material.EXPANSION ANCHOR BOLTS is sealed in a circumferential direction by the theoretical disconnected position that connects the spreading tenon on its front end in this expansion structure of the present invention.The advantage of this expansion structure of the present invention is, timber can not be squeezed into the inside, slit between the spreading tenon when squeezing into EXPANSION ANCHOR BOLTS to the timber the inside, the spreading tenon backed down mutually and EXPANSION ANCHOR BOLTS is split.

Expansion structure regulation of the present invention, described EXPANSION ANCHOR BOLTS has surface coarse or plucking.For example the corresponding coarse die cavity surface of the injection mould by being used to process EXPANSION ANCHOR BOLTS can process coarse surface.For example can process or adjust roughness by spark erosion.Rough surface improves EXPANSION ANCHOR BOLTS and is anchored the frictional engagement between the hole wall in the basis, and the EXPANSION ANCHOR BOLTS that is anchored EXPANSION ANCHOR BOLTS in the inside, hole and improves spreading is being anchored fixing in the basis and is rotating together for spreading prevents EXPANSION ANCHOR BOLTS when the screw-in screw.Coarse in addition surface is strengthened the surface and is strengthened EXPANSION ANCHOR BOLTS fixing and preventing in being anchored the basis thus and rotate together when screwing in screw.The effect of finished surface in little EXPANSION ANCHOR BOLTS diameter than more obvious in the big EXPANSION ANCHOR BOLTS diameter bigger on ratio because the surface is strengthened for little diameter.

Expansion structure regulation of the present invention,, described EXPANSION ANCHOR BOLTS do not have barb on its excircle and have on its length constant or only in one direction, (or dwindling) cross section of on both direction, not strengthening.EXPANSION ANCHOR BOLTS is axially broken away from from injection mould, and this injection mould needn't be on the die cavity that forms EXPANSION ANCHOR BOLTS is vertical separately in order to open.General injection mould in axial plane be separately and be transverse to die cavity and axially open.This injection mould is the content of claim 13.Can to separate injection mould in order processing, vertically to open for the EXPANSION ANCHOR BOLTS demoulding needn't be transverse to die cavity.Equally with core demoulding from EXPANSION ANCHOR BOLTS axially realize the EXPANSION ANCHOR BOLTS demoulding.Therefore need not to pull out core perpendicular to the injection mould perforate.Can be provided with in the Different Plane of injection mould in addition and a plurality ofly be used for the die cavity of a plurality of EXPANSION ANCHOR BOLTS of injection moulding and needn't be arranged on the inside, plane, this situation is when injection mould is opened in an axial plane of die cavity.

Description of drawings

Provide further feature of the present invention by following embodiment of the invention description in conjunction with claim and accompanying drawing.Each feature can realize with combination arbitrarily independent or a plurality ofly in an embodiment of the present invention.In the accompanying drawing:

Fig. 1 illustrates according to EXPANSION ANCHOR BOLTS of the present invention with axial cross section,

Fig. 2 illustrates the EXPANSION ANCHOR BOLTS of Fig. 1 with the spreading state,

Fig. 3 illustrates the rearward end of Fig. 1 EXPANSION ANCHOR BOLTS with end view drawing,

Fig. 4 illustrates the injection mould of the EXPANSION ANCHOR BOLTS that is used for working drawing 1,

Fig. 5 illustrates second embodiment according to EXPANSION ANCHOR BOLTS of the present invention with side view,

Fig. 6 illustrates the EXPANSION ANCHOR BOLTS of Fig. 5 with axial cross section,

Fig. 7 illustrates the EXPANSION ANCHOR BOLTS of Fig. 5 with the axial cross section of sectional planes of comparing rotation 45 degree with Fig. 6,

Fig. 8 illustrate Fig. 5 EXPANSION ANCHOR BOLTS from the front end view drawing of (among Fig. 5 from the left side), do not have screw,

Fig. 9 illustrates Fig. 5 EXPANSION ANCHOR BOLTS end view drawing of (in Fig. 5 from the right side) from behind, does not have screw,

Figure 10 illustrates the stereogram of Fig. 5 EXPANSION ANCHOR BOLTS, does not have screw.

Embodiment

Shown in Figure 1, make by injection moulding integratedly according to EXPANSION ANCHOR BOLTS 1 of the present invention.It is columniform and have in the vertical wear thoroughly, be axial bore 2, it has diameter step 3, by them the hole is shunk on vertically in EXPANSION ANCHOR BOLTS 1.Diameter step 3 is ring stepped shapes in the present embodiment, but they also can have other shape, for example has to taper to surpass 90 °, the best cone angle above 120 °.Make hole 2 have the segmentation of four constant diameters by three diameter steps 3, wherein its excess-three segmentation in hole 2 slightly is longer than in the segmentation of maximum diameter, and they are isometric.Three diameter steps 3 and four quantity with hole 2 segmentations of constant diameter are not enforceable for the present invention.

Make EXPANSION ANCHOR BOLTS 1 be divided into four spreading tenons 5 by the slit 4 in two mutual decussate axial planes.Slit 4 is opened wide on the front end of EXPANSION ANCHOR BOLTS 1, and wherein this end is called front end, and hole 2 has minimum diameter thereon.Slit 4 and relevant spreading tenon 5 extend to 2 sections in hole with maximum diameter always, that is, and and on EXPANSION ANCHOR BOLTS 1 length, on promptly about 3/4 EXPANSION ANCHOR BOLTS, 1 length greater than half.Slit 4 and spreading tenon 5 limit the spreading position 6 of EXPANSION ANCHOR BOLTS 1.On rearward end, connect do not crack, tubular handle bar 7.This end of EXPANSION ANCHOR BOLTS 1 is called rearward end, has maximum diameter at this end mesopore 2.Radially outwards give prominence to the hollow muscle 8(of two V-arrangements cross section opposed to each other referring to Fig. 3 from handle bar 7), they and EXPANSION ANCHOR BOLTS 1 are one.

As in Fig. 1 shown in by a dotted line, the handle bar 7 of EXPANSION ANCHOR BOLTS 1 can be longer, that is, about twice to 2.5 times forms hole 2 segment length of diameter steps to all the other.

For the described EXPANSION ANCHOR BOLTS 1 of spreading has screw 9, it for example has the wood snail line.The major diameter of thread of wood screw 9 or the nominal diameter substantially diameter with 2 sections in the hole of maximum diameter are the same big, and screw 9 has axial fulcrum on maximum diameter step 3 thus.

As what see in Fig. 2, the through hole 10 that EXPANSION ANCHOR BOLTS 1 is joined, promptly is passed in the component 11 that will be fixed with so-called plug-in mounting is placed in 12 the insides, hole that are anchored basis 13.It joins EXPANSION ANCHOR BOLTS 1 handle bar 7 the insides up to leaning on maximum diameter step 3 (such as shown in fig. 1) to EXPANSION ANCHOR BOLTS 1 by screw 9() pass through hole 10 in the component 11 that will be fixed and join through hole 12 the insides that are anchored basis 13.Axial fulcrum on the hole 2 maximum diameter steps 3 of screw 9 in EXPANSION ANCHOR BOLTS 1 can make EXPANSION ANCHOR BOLTS 1 strike 12 the insides, hole with respect to EXPANSION ANCHOR BOLTS 1 undersize.Axially fulcrum is avoided EXPANSION ANCHOR BOLTS 1 spreading when striking 12 the insides, hole.If the component 11 that are fixed are for example made by timber and bore direct to being anchored basic 13 the insides thoroughly by diamond bit, then occur, through hole 10 has the diameter littler than the hole that not have by same diamond bit interruptedly to get out in basic 13 the insides of anchor of for example being made by concrete 12 in the component 11 that will be fixed.However, axial fulcrum on the maximum diameter step 3 of the screw 9 of EXPANSION ANCHOR BOLTS 1 in the hole 12 of EXPANSION ANCHOR BOLTS 1 is big like this, makes the screw head of EXPANSION ANCHOR BOLTS 1 by hammering screw 9 can be passed in the component 11 that will be fixed that less through hole 10 joins 12 the insides, hole that are anchored basic 13 the insides on the diameter.This is equally applicable to this situation, and the hole 12 in being anchored basis 13 for example has because with the also littler diameter of same diamond bit boring owing to the diamond bit of wearing and tearing has with respect to EXPANSION ANCHOR BOLTS 1 undersize and the through hole 10 in the component 11 that will be fixed.

As shown in Figure 2, hollow muscle 8 is by the handle bar 7 of the inside roof pressure contact of the wall body in hole 2 EXPANSION ANCHOR BOLTS 1.They rotate when insurance prevents EXPANSION ANCHOR BOLTS 1 at screw-in screw 9 as rotating together in another boring the inside.

Later on screw 9 being screwed into EXPANSION ANCHOR BOLTS 1 the inside to 12 the insides, hole that are anchored basis 13 in adding EXPANSION ANCHOR BOLTS 1 also makes EXPANSION ANCHOR BOLTS 1 spreading and anchor be anchored basic 13 the insides thus.The spreading tenon is shown in Fig. 2 extremely large.The lead of screw thread foremost of screw 9 is embedded into spreading tenon 5 the insides respectively when reaching diameter step 3 when screwing in screw 9, guarantees that thus screw 9 in the reliable feeding of EXPANSION ANCHOR BOLTS 1 the inside and slowly raising torque, reduces the hidden danger that EXPANSION ANCHOR BOLTS 1 is rotated together thus.Stepped shape by EXPANSION ANCHOR BOLTS 1 hole 2 is shunk and is made the spreading tenon along with the degree of depth that are anchored basis 13 and increase become big, that is, make the spreading effect along with the increase maximum that is anchored basic 13 surface distances.Diameter step 3 can be interpreted as hinge, thereon spreading tenon 5 when spreading to extrinsic deflection.

Fig. 4 illustrates the injection mould 14 that is used to process EXPANSION ANCHOR BOLTS 1.Injection mould 14 has cylinder hole shape die cavity 15, and it opens wide on two ends.Injection mould 14 is not separated, and it can not be transverse to die cavity 15 and axially open.

Stretch out punch die 16,17 from two sides to die cavity 15 the insides, one of them punch die 16 is columniform and only to put in die cavity 15 the insides a bit of.Another punch die 17 forms the diameter step corresponding to EXPANSION ANCHOR BOLTS 1 hole 2.Extend into four the static muscle 18 in die cavity 15 the insides in addition, they are arranged on mutual decussate die cavity 15 axial planes the inside.Muscle 18 is static, and its internal edge forms step corresponding to the hole 2 of EXPANSION ANCHOR BOLTS 1 or the diameter step of punch die 17.Injection mould 14 preferably has many die cavitys 15, and they for example can be arranged on imaginary grid the inside, are used for the EXPANSION ANCHOR BOLTS 1 in injection mould the inside processing respective numbers.The punch die 17 that forms the diameter step after injection moulding axially pulls out from the die cavity 15 of injection mould 14, and another punch die 16 axially moves to die cavity 15 the insides and knocking-on EXPANSION ANCHOR BOLTS 1.EXPANSION ANCHOR BOLTS 1 has the slit, and muscle 18 is immersed in the inside, slit when knocking-on EXPANSION ANCHOR BOLTS 1.

Described EXPANSION ANCHOR BOLTS 1 has constant excircle, hole 2 only one of EXPANSION ANCHOR BOLTS 1 vertically within it portion strengthen (or dwindle, direction) according to the observation.Hollow muscle 8 extends with vertically the going up of longitudinal slot 4 the insides that is arranged in the axial plane.Make EXPANSION ANCHOR BOLTS 1 from the injection mould 14 axial demouldings thus, need not to be transverse to die cavity 15 and axially open injection mould 14.

Shown in Fig. 5 to 10, process by injection moulding equally integratedly according to EXPANSION ANCHOR BOLTS 1 of the present invention.It is columniform and has penetrating in the vertical, axial bore 2, and the latter has diameter step 3, pass diameter step hole 2 EXPANSION ANCHOR BOLTS 1 vertically on from after forward, among Fig. 5 to 7, shrink from right to left.EXPANSION ANCHOR BOLTS 1 hole 2 of Fig. 5 to 7 has two diameter steps 3, and they are divided into three sections with constant diameter with hole 2.The diameter step 3 of front end is positioned at the longitudinal center of EXPANSION ANCHOR BOLTS 1 substantially, and the front end rigion in hole 2 is extended on half length of EXPANSION ANCHOR BOLTS 1 substantially.Hole 2 back segments with maximum diameter slightly are longer than two intermediate sections between the diameter step 3.All EXPANSION ANCHOR BOLTS 1 are irrespectively isometric with its diameter, they in the present embodiment diameter for example be 6,8,10,12 and during 14mm length be 30mm.

By the slit in the axial plane 4 EXPANSION ANCHOR BOLTS 1 is divided into two spreading tenons 5, they have the shape of circumference half shell.Sectional plane is positioned at the inside, plane, slit in Fig. 7, becomes 45 degree rotations with it at Fig. 6 middle section figure.The screw thread 19 that makes screw 9 by two spreading tenons 5 that extend only on the circumferencial directions of the 180 degree almost separately hidden danger of spreading tenon 5 is littler, if when screw 9 is screwed into EXPANSION ANCHOR BOLTS 1 the inside.Screw thread 19 cuts spreading tenon 5 quite minutely, if when spreading tenon 5 extends on bigger circumference range.

Is extending above on half EXPANSION ANCHOR BOLTS 1 length with relevant spreading tenon 5 in slit 14, promptly on about 9/10 EXPANSION ANCHOR BOLTS 1 length, extend, keep tubular handle bar 7 relatively short, that seal in a circumferential direction thus on the rearward end of EXPANSION ANCHOR BOLTS 1, it is 1/10 of EXPANSION ANCHOR BOLTS 1 length only.

The EXPANSION ANCHOR BOLTS 1 of Fig. 5 to 10 and the EXPANSION ANCHOR BOLTS of Fig. 1 to 31 are the same can to have common wood screw as screw 9.The EXPANSION ANCHOR BOLTS 1 of Fig. 5 to 10 has special screw in the present embodiment, and it has sharp screw thread 19, promptly is the wood snail line equally, and it cuts to the plastics the inside of EXPANSION ANCHOR BOLTS 1 when screwing in screw 9.In Fig. 8 to 10 for the clearer EXPANSION ANCHOR BOLTS 1 that does not have screw 9 that illustrates.The screw thread 19 of screw 9 has sizable core diameter and little thread depth.Thread depth is the radial distance of screw thread 19 tops and thread core.Thread depth is 0.5mm in the present embodiment, and the external diameter of screw thread 19 is the same big with the internal diameter of hole 2 rear end section with maximum diameter.The thread core diameter of screw 9 substantially the same with the diameter of hole 2 intermediate sections big or, as in the present embodiment, even bigger.By using special screw 9 to make anchor power, being that the EXPANSION ANCHOR BOLTS 1 of spreading is fixing much larger than the common wood screw that has than major thread height and littler core diameter what be anchored the inside, basis.The test of pulling out in concrete provides three times bigger anchor power.Also can use the EXPANSION ANCHOR BOLTS of Fig. 1 to 3, have the special screw 9 of Fig. 5 to 7.

With the described such arrangement that realizes the EXPANSION ANCHOR BOLTS 1 of Fig. 5 to 10 of Fig. 2, therefore please refer to respective embodiments.By hammering EXPANSION ANCHOR BOLTS 1 is passed the component that will be fixed and join the inside, anchor basis, hammering also can mechanically for example apply by boring hammer, on 9 on screw, just enough on the maximum diameter step 3 of its axial fulcrum in EXPANSION ANCHOR BOLTS 1 hole 2, be used for the narrow through hole that EXPANSION ANCHOR BOLTS 1 is also passed the component that will be fixed is joined the inside, hole that is anchored the basis.Screw thread 19 prevents to split when squeezing into EXPANSION ANCHOR BOLTS 1 by 9 on hammering screw at the axial fulcrum on the maximum diameter step 3.

Make EXPANSION ANCHOR BOLTS 1 be anchored basis the inside spreading and anchor to EXPANSION ANCHOR BOLTS 1 the inside by screwing in screw 9.Although spreading tenon 5 is axially guided screw 9 and long slit 4 and short handle bar 7 prevents that also screw 9 sides from passing slit 4 and stretching between spreading tenon 5.

Torque when screwing in screw 9 slowly increases, and reduces the hidden danger that EXPANSION ANCHOR BOLTS 1 is rotated together thus.By becoming big in the degree of depth that the contraction of stepped shape ground increases the spreading tenon in being anchored the basis in EXPANSION ANCHOR BOLTS 1 of hole 2.

Spreading tenon 5 is interconnected in a circumferential direction by theoretical disconnected position 20.Theoretical disconnected position 20 is the thin-walled materials with little cross section.Theoretical disconnected position 20 splits when spreading, if screw 9 is near them or when reaching them.Theoretical disconnected position 20 prevents to split the component timber realization that it for example will be fixed by conduct when spreading tenon 5 from shifting to an earlier date spreading undesirably and EXPANSION ANCHOR BOLTS 1 is inside joining the anchor basis under limit case in saturating plug-in mounting is joined.

The EXPANSION ANCHOR BOLTS 1 of Fig. 5 to 10 has the outwards outstanding hollow muscle 8 of two V-arrangements in handle bar 7 positions.Different with Fig. 1 to 3, hollow muscle 8 opens wide towards the EXPANSION ANCHOR BOLTS inner side surface in Fig. 5 to 10.Hollow muscle 8 is as prevent the insurance that EXPANSION ANCHOR BOLTS 1 is rotated together when screwing in screw 9.Because they are hollow and unlimited towards EXPANSION ANCHOR BOLTS 1 inner side surface, so they are easy to internal strain in narrow the inside, hole.However, they in the inside, big hole the same with the hollow muscle of the EXPANSION ANCHOR BOLTS of for example Fig. 1 to 38 when screwing in screw 9, obtain much at one prevent that EXPANSION ANCHOR BOLTS 1 from rotate together fix, the hollow muscle of Fig. 1 to 3 seals by handle bar 7 or for example is solid muscle at its root.

The EXPANSION ANCHOR BOLTS 1 of the same working drawing 5 to 10 with the described EXPANSION ANCHOR BOLTS of Fig. 1 to 3 in injection mould, injection mould are indiscrete and can not be transverse to the die cavity that forms EXPANSION ANCHOR BOLTS 1 and axially open.Axially realize EXPANSION ANCHOR BOLTS 1 demoulding, simplified injection mould and easy EXPANSION ANCHOR BOLTS 1 demoulding and minimizing waste product towards the muscle 8 that EXPANSION ANCHOR BOLTS 1 inner side surface opens wide.

Make EXPANSION ANCHOR BOLTS 1 have surface plucking or coarse in order to strengthen the surface.This improves its fixing in being anchored the basis.Strengthening the surface compares with surface area when having the minor diameter EXPANSION ANCHOR BOLTS than bigger when having major diameter EXPANSION ANCHOR BOLTS 1.Can be by the corresponding roughness processing plucking of injection mould die cavity wall body, in injection mould the inside processing EXPANSION ANCHOR BOLTS 1.The die cavity surface roughness for example can and be adjusted by the processing of burn into especially spark erosion.

Claims

1. have in the vertical and to extend, the preferably penetrating hole (2) and the EXPANSION ANCHOR BOLTS of slit (4), this hole (2) has many diameter steps (3), this slit (4) is extended on the spreading position (6) of EXPANSION ANCHOR BOLTS (1) and is made EXPANSION ANCHOR BOLTS (1) be divided into spreading tenon (5) in spreading position (6), it is characterized in that, described EXPANSION ANCHOR BOLTS (1) has screw (9), it can be screwed into hole (2) the inside and make EXPANSION ANCHOR BOLTS (1) spreading thus, makes slit (4) and spreading tenon (5) is extended on greater than half length of EXPANSION ANCHOR BOLTS (1) and the stepped portions in hole (2) is extended on greater than half length of EXPANSION ANCHOR BOLTS (1).

2. EXPANSION ANCHOR BOLTS as claimed in claim 1, it is characterized in that, described screw (9) has axial fulcrum in addition or on maximum diameter step (3) at the spreading position (6) of cracking of EXPANSION ANCHOR BOLTS (1), and it can pass through screw (9) bump EXPANSION ANCHOR BOLTS (1) to the inside, hole (12).

3. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described EXPANSION ANCHOR BOLTS (1) has two spreading tenons (5).

4. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described diameter step (3) has essentially identical axial distance each other.

5. EXPANSION ANCHOR BOLTS as claimed in claim 4 is characterized in that, the not vent portion length of described EXPANSION ANCHOR BOLTS (1) be diameter step (3) axial distance that mutually is connected pact half to about twice.

6. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described screw (9) has the thread depth of about 0.5mm.

7. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, the foremost diameter step (3) in the hole (2) in EXPANSION ANCHOR BOLTS (1) approximately is positioned at EXPANSION ANCHOR BOLTS (1) mid-length.

8. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described EXPANSION ANCHOR BOLTS (1) its not vent portion have outwards outstanding projection (8), they can be placed on its circumference.

9. EXPANSION ANCHOR BOLTS as claimed in claim 8 is characterized in that, described projection (8) is hollow.

10. EXPANSION ANCHOR BOLTS as claimed in claim 8 is characterized in that, described projection (8) is opened wide towards the EXPANSION ANCHOR BOLTS inner side surface.

11. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described spreading tenon (5) its front, do not interconnect by theoretical disconnected position (20) on the end of vent portion away from EXPANSION ANCHOR BOLTS (1).

12. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described EXPANSION ANCHOR BOLTS (1) has the surface of plucking.

13. EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that, described EXPANSION ANCHOR BOLTS (1) does not have barb and its external cross section on its excircle be constant on length or only increasing in one direction.

14. be used for injection mould as claim 1 to 7 EXPANSION ANCHOR BOLTS (1) as described in each, it is characterized in that, described injection mould (14) is not transverse to injection mould (14) die cavity (15) and vertically opens wide, and this die cavity is molded expansion bolt (1) when injection moulding.