CN1217067C

CN1217067C - Ground anchor

Info

Publication number: CN1217067C
Application number: CN018230180A
Authority: CN
Inventors: 阿图尔·凯克
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-02
Filing date: 2001-02-02
Publication date: 2005-08-31
Anticipated expiration: 2021-02-02
Also published as: DE50104153D1; ATE279590T1; CA2437299A1; US20040103599A1; WO2002061210A1; EP1360379A1; BR0116868A; ES2231450T3; JP2004520505A; DE10195936D2; EP1360379B1; CN1492959A

Abstract

The present invention relates to a ground anchor which is screwed into ground. The present invention comprises a ground anchor shaft (3), and a supporting component (8) placed on the ground and an operating device (9) are arranged in an upper end (8a) zone of the ground anchor shaft; the ground anchor also comprises a plurality of helical blades (5, 6 and 7) which are made of sheets and are spiraled along the ground anchor shaft (3), the helical blades are mutually staggered definite distances along the ground anchor shaft (3) and are respectively composed of a spiral with an upper blade end (11) and a lower blade end (12), wherein the spiral length of each blade (5, 6 and 7) slightly exceeds 360 DEG, and thus, the blade ends (11, 12) are overlapped in the circumferential direction, a cutting gap (11a) defined by an upper plane and a lower plane is simultaneously formed, and the outer diameter of each blade (5, 6 and 7) is gradually reduced from the supporting component (8) to the lower shaft end and from the blade to the blade. A shaft tip (22) is formed in a wood screw shaft type and is provided with a conical core (23) and a section of continuous thread which is spiraled along the conical core (23), and the conical core (23) is thinned toward a free lower shaft end (25) in a conical shape.

Description

Earth anchor

Technical field

The present invention relates to a kind of earth anchor that is used to screw in ground, described earth anchor comprises an earth anchor axle, this earth anchor axle has one in the zone in the top can be placed on ground support unit and a manipulation device, described earth anchor comprises a plurality of helical blades of being made by sheet material that revolve around described earth anchor reel, these helical blades are along stagger mutually certain distance and have up and down the spiral of blade tip by respectively and form of described earth anchor axle, wherein, the helix length of each blade is slightly above 360 °, like this, blade tip is overlapping in a circumferential direction, formed a cutting gap of plane earth qualification up and down simultaneously, the external diameter of described blade reduces from the blade to the blade from the support unit to the lower shaft end gradually.

Background technology

Earth anchor by the known a kind of this type of DE 44 24 339 C2.Such earth anchor footpath has proved its value in practice.Even it also has good stable in sand ground.

Summary of the invention

The objective of the invention is further increases the stability of this earth anchor, and make improvements, and it can be screwed in the ground more easily.

According to the present invention, realize that the method for above-mentioned purpose is, the form that described pivot end press the wood screw axle constitutes, and has that a tap web that attenuates towards the taper of described lower shaft end is freely examined and continuous thread that one section revolves around described tap web nuclear disk.

The earth anchor that has this pivot end has later bigger stability in screwing in ground.But the more important thing is that it can screw in the ground more easily.This is that described earth anchor axle has a plurality of blades separated by a distance because the pivot end of wood snail spike pulls down described earth anchor axle, so the blade of these configurations separated by a distance is subjected to downward pulling force in the process that screws in or be screwed into ground.Like this, they are hauled incision ground downwards.

According to another development of the present invention, in the tap web nuclear zone of pivot end, the helical angle of screw thread is greater than the helical angle of each blade that separates at a certain distance.Adopt the helical angle of this increase, when screwing in, earth anchor pivot end has applied bigger downward power on earth anchor.

According to another development of the present invention, in the pivot end regions, screw thread has one and examines the tapered cross-sectional profile in outside wedge shape ground from tap web.Described tapered wedge-shaped cross-section profile makes earth anchor pivot end become a kind of drilling tool that protrudes in the ground.

According to another development of the present invention, except the free-ended screw thread terminal area of pivot end, it is identical that the height of described screw thread keeps substantially.

According to another development of the present invention, described pivot end accurate centering on described earth anchor axle is arranged.This accurate centering is important for making things convenient for, inserting ground smoothly.

According to another development of the present invention, a spherical shell in the swing head can be locked on the swing position of a setting by a chucking screw.So just can prevent that swinging head unexpectedly or by accident removes from its desired location.

According to another development of the present invention, described chucking screw is a headless screw.

According to another development of the present invention, be spaced from each other the flexibility that the rib place, lower end of nethermost blade in the blade of distance has and be spaced from each other the flexibility of the blade of distance greater than other.This lower end rib help screwing in than the macrobending degree.

In earth anchor screw-in surface process, make ground loosening.Therefore general hypothesis earth anchor can become not too firm.Yet this is wrong.

Therefore looseningly increased stability and increased its supporting capacity by this just.

The size of earth anchor is adapted to service condition.It can be adapted to from the minimum dimension that for example is used for the grappling tent to the large scale that is used for fixing building.

Description of drawings

The present invention will be described in more detail below with reference to the accompanying drawings.

This accompanying drawing has shown an earth anchor that has the earth anchor axle, and the upper end of this earth anchor axle has disposed a support unit and a manipulation device.Helical blade disposes along the earth anchor axle spaced reciprocally.Penetrate the earth anchor pivot end shape such as the wood screw axle in the bottom on ground.It is tapered towards free end, and has disposed one at the outer wall place as the continuous thread of threaded-on flange structure, and the helical angle of this screw thread is greater than the helical angle of the blade that is spaced from each other configuration.

The specific embodiment

Earth anchor 1 shown in the figure comprises an earth anchor axle 3, has disposed a support unit 8 in the upper end of this earth anchor axle 3.Described support unit 8 comprises a dish 8a and a lasso 8b, and described lasso 8b extends downwards, by the edge complete closed of dish 8a.The diameter of support unit 8 is than greatly for example 4 centimetres of the diameters of helical blade 5,6 and 7, and these helical blades are spaced from each other certain distance along earth anchor axle 3, and will be described in more detail these helical blades below.The difference of diameter can also be greater than 4 centimetres.A fastening devices 9 is connected to and preferably is welded on the dish 8a.Earth anchor axle 3 passes dish 8a and extends in the fastening devices 9 always.

Blade 5,6,7 on earth anchor axle 3 is made up of plate material.They are twining earth anchor axle 3 separately, and have 360 ° of loopfuls of a ratio longer coiling length in footpath that detours.Adopt in such a way,, obtain a cutting gap 11a in the overlapping scope between blade end 11 and lower blade end 12 respectively for each blade 5.6.7.Described overlapping can 25 to 55 the degree between.What preferably 35 to 45 degree were separated is overlapping.Blade 5,6,7 extends in the sagittal plane with respect to earth anchor axle 3.

Blade 5,6,7 is preferably in rib 11b place end in the top in the blade plane 11c, and the lower end rib 12b of blade 5,6,7 is bent downwardly.In the flexibility at the rib 12b place, lower end of a bottom blade 7 obviously greater than other blade 5,6 flexibility herein.The flexibility of end rib 12b has active influence to the screw-in effect of earth anchor.The gradient phase coadaptation of blade 5,6,7.The external diameter of blade 5,6,7 reduces downwards to earth anchor pivot end 10 equably from support unit 8.Uppermost blade 5 can be less than the distance between the blade 5,6,7 from the distance of support unit 8.

Manipulation device 9 has a swing head 13, and this swing head 13 for example is fixed by welding on the dish 8.This swing head 13 has quadrangle or hexagonal profile, so that connect the screwing tool that does not have demonstration.Earth anchor can be screwed in the ground by such instrument.The recess 13a that swing head 13 has a spherical shell shape.A spherical shell 14a is inserted among the 13a of the female portion, and a pipe 14 for example can be soldered on this spherical shell 14a.The spherical shell 14a that has pipe 14 can adjust on the desirable swing position in certain limit.For it can be swung, a through hole 14b is set in the bottom of spherical shell 14a.A chucking axle sleeve 15 is inserted among this spherical shell 14a.By an adjustment screw 17 that passes among the screwed hole 13b that chucking axle sleeve 15 and spherical shell 14a be screwed into swing head 13, spherical shell 14a is coupled together with chucking axle sleeve 15 on ideal position regularly.Through hole 14b on the spherical shell 14a must be enough big for this reason.For example a tube connector 18 can be installed on the pipe 14.Some hold-down screws 19 can couple together pipe 14 and 18.In swing head 13, disposed a headless screw 20, this headless screw 20 is screwed into and is pressed on the described spherical shell 14a after spherical shell 14a and pipe 14 contrapositions, and described headless screw protrudes among the described spherical shell, is fixed in like this on the desirable swing position.

Disposed a special pivot end 22 at 21 places, bottom of earth anchor axle 3, this pivot end 22 helps earth anchor and screws in ground.Described pivot end 22 forms by the form of wood screw axle.The tap web nuclear 23 of pivot end 22 preferably is welded on the end 21 of earth anchor axle 3.Certainly, other suitable fixed form also is feasible with possible.Tap web nuclear 23 from the permanent position 24 to its free end 25 tapers be tapered to earth anchor point 26.Continuous thread 27 is twining tap web nuclear 23.

In the tap web of pivot end 22 was examined 23 zones, the helical angle of screw thread 27 was greater than the helical angle of each blade 5,6,7 that separates at a certain distance.Pivot end 22 just provides and has better pierced effect like this.

In the zone of pivot end 22, screw thread 27 has from tap web examines 23 outside tapered wedge-shaped cross-section profiles.Except the screw thread terminal 28 at free end 25 places of pivot end 22, the height of screw thread 27 had better remain unchanged substantially.

Importantly, pivot end 22 centering accurately on earth anchor axle 3.Accurately centering has prevented a plurality of problems in the screw-in process, and to screw in for straight line be vital.

Advantageously, the circumferential edges of blade be obviously circular also.It is less to screw in needed power like this.Described earth anchor is made by steel and is preferably carried out galvanizing.Other material such as stainless steel are suitable for the large-scale earth anchor as piping support or building foundation or other type structure.For light-duty fixing, for example stay cord is fixing, also can use plastics.

Claims

1. earth anchor that is used to screw in ground, described earth anchor is subdivided into support unit (8), earth anchor axle (3) and shaft end (21), wherein

-described earth anchor has one in (8a) zone in the top can be placed on a ground support unit (8) and a manipulation device (9),

-a plurality of helical blades of making by sheet material (5 that spiral around described earth anchor axle (3), 6,7), described helical blade is along stagger mutually certain distance and have up and down blade tip (11 by respectively of described earth anchor axle (3), 12) spiral is formed, wherein, each blade (5,6,7) helix length is slightly above 360 °, each blade tip (11 like this, 12) overlapping in a circumferential direction, formed a cutting gap (11a) of plane earth qualification up and down simultaneously, described blade (5,6,7) external diameter reduce gradually from the blade to the blade from support unit (8) to lower shaft end (21) and

-have an axle head (21) of pivot end (22),

It is characterized in that:

-described pivot end (22) is furnished with the tapered tap web nuclear of taper (23) towards lower shaft end (25) freely,

The form that-described pivot end (22) is pressed the wood screw axle constitutes, and has one section continuous thread (27) that spirals around the tapered tap web nuclear of described taper (23),

-wherein said screw thread (27) has one from the tapered cross-sectional profile in tap web nuclear (23) outside wedge shape ground.

2. earth anchor according to claim 1 is characterized in that: in tap web nuclear (23) zone of described pivot end (22), the helical angle of screw thread (27) is greater than the helical angle of each blade that separates at a certain distance (5,6,7).

3. earth anchor according to claim 1 and 2 is characterized in that: except the screw thread terminal area of the free end (25) of pivot end (22), the height of described screw thread (27) keeps identical substantially.

4. earth anchor according to claim 1 and 2 is characterized in that: described pivot end (22) is gone up accurate centering at described earth anchor axle (3) and is arranged.

5. earth anchor according to claim 1 is characterized in that: a spherical shell (14a) in the swing head (13) of manipulation device (9) can be locked on the swing position of a setting by a chucking screw (20).

6. earth anchor according to claim 5 is characterized in that: described chucking screw (20) is a headless screw.

7. earth anchor according to claim 1 is characterized in that: be spaced from each other the flexibility that has in lower end rib (12b) place apart from nethermost blade (7) in the blade (5,6,7) and be spaced from each other the flexibility of the blade (5,6,7) of distance greater than other.