EP2324172B1 - Foundation system for aligning and fastening a rod-like object in the soil - Google Patents

Description

The invention relates to a foundation system for aligning and fixing a rod or post-shaped object in the ground, with a screwed into the ground, thin-walled sleeve-like receiving part, which receives an end portion of the rod or post-shaped object in the attached state and surrounds its circumference at least partially spaced, optionally with a filling material which fills in the state of attachment the space between the end portion of the rod or post-shaped object and the inner contour of the receiving part, and with a Einschraubwerkzeug which has a dimensionally stable fitting core, which is inserted for screwing the receiving part in this and then on the Inner contour of the receiving part rests and this supports, by at least partially positive fit in the sense of introducing the forces required for the introduction of forces and / or moments on the receiving part with respect to its length short force path over endures, within the meaning of the preamble of claim 1.

The invention further relates to a receiving part and a screwing-in tool for said foundation system.

Such foundation or fastening systems are known per se. They are used for permanent or temporary erection of posts, poles and the like, as they are needed for fences, information signs and panels, spin dryers in gardens and other structures of all kinds. They consist of a receiving part (ground screw, ground dowel), with an outer spiral for screwing into the soil, a screwing and optionally a filler, by means of which the mast, post or the like to be fastened in the receiving part is held aligned and secured.

For example, the fastening system according to is known DE 199 60 854 A1 , It is suitable for all types of soil, including scree, gravel, sandy and loam soils, not only on the level, but also on dams and embankments. The sleeve-like receiving part is for example a screw sleeve. After screwing the receiving part in the ground of the rod-shaped object is inserted into the receiving part, which then the lower end surrounds the rod-shaped object at a distance. The rod-shaped object can then be aligned vertically, which can compensate for directional deviations that have arisen when inserting the receiving part in the ground, again. Then, the annular space between the lower end of the rod-shaped object and the receiving part is filled with a filler material. The filler may be granular, such as granules, hard sand, split or rock material. But also an elastic plastic material comes into question, as well as a solidifying liquid mass, especially concrete. The use of a granular material has the advantage that the entire fastening device can be quickly removed again, for example in temporarily created structures at exhibitions and fairs. A solidifying material such as plastic or concrete has the advantage that the unwanted extraction of the anchored part is prevented or impeded.

The receiving part of said attachment system and similar attachment systems was relatively massive. Because it not only had to absorb the forces that emanated from the immediately attached mast, but it was heavily stressed by a long power flow path when screwing in, for example because the screwing attacked at its upper end, approximately in the form of a plugged pin ( DE 93 13 258 U1 ).

As a material for the receiving part, therefore, for example, steel, hammered out of one piece and hot-dip galvanized, proposed (company publication "The new Krinner ground dowel system" Krinner GmbH, D-94342 Straßkirchen), but also plastic in large wall thickness or at least for ground dowels - a combination of plastic and metal ( DE 202 20 515 U1 ). All of these embodiments were very expensive for such a receiving part as a mass-produced, especially since it - despite the fundamental possibility of its reuse - even where it is only temporarily needed, then often remains in the ground and is lost.

That is why in EP 1 724 416 A2 proposed a foundation system in which the screwing-in a dimensionally stable fitting core, which largely abuts the inner contour of the receiving part and this supports, by at least partially positive fit in terms of insertion the forces required for insertion forces and / or moments surface on the receiving part with relative to whose length transmits short force path and the only serving here as shuttering, thin-walled receiving part only thereby granted its required for introduction into the ground dimensional stability.

This results in the advantage that the receiving part may be thin-walled and made of plastic, for example, because the extensive investment of Einschraubwerkzeuges or its mating core on the inner contour of the receiving part brings short power transmission paths with it, which make it possible to dispense with the previously required for screwing increased inherent rigidity of the receiving part.

The requirement of extensive installation of Einschraubwerkzeuges or its mating core on the inner contour of the receiving part means, of course, that the mating core designed very voluminous, namely - where not already as solid solid core, then at least - with a largely the surface of the inner contour of the receiving part corresponding surface must be trained. Although this brings a good support of the thin-walled receiving part with it, but also means a very significant cost of materials and thus considerable manufacturing costs and a considerable weight of the screwing, with the result of his difficult handling.

In addition, the more or less full surface contact between the dowel core and the receiving part has the disadvantage that the withdrawal of the dowel core is difficult after screwing the receiving part. This is based, on the one hand, on the fact that the frictional engagement associated with the abutment of the parts is intensified by the fact that the soil displaced during screwing presses on the receiving part and thus presses it against the fitting core at least in places. In addition, to transfer the screwing normally an at least regionally positive fit between Einschraubwerkzeugs and receiving part is provided which prevents axial rotation of the two parts against each other, which is why the tool can only be pulled out of the screwed-receiving part in the axial direction or must be "torn out" , which can easily lead to a relaxation of the holding of the receiving part in the ground. This applies even more if the receiving part does not have a circular inner contour, but for example a polygonal cross-section, as it is suitable for certain applications.

It follows as an object to propose a foundation system for aligning and fixing a rod or post-shaped object in the ground with a screwed into the ground, thin-walled sleeve-like receiving part, in which the screwing material and cost-saving and thus lighter and easier to handle and designed, that it can be removed without loss of support function and in the transmission of the forces required for screwing after screwing easier and without affecting the seat of the receiving part in the soil from this.

To solve this problem is proposed according to the characterizing part of claim 1, the pass core - instead of a solid core or at least a full coat - from a plurality of webs extending over a substantially the length of the system belonging to the receiving part length of the axis of the Einschraubwerkzeugs star-shaped (radially) away and in its outer contour over its length substantially in such a way in turn tuned thereto inner contour of the relevant receiving part are adapted to that - they are inserted - largely frictionally and / or positively against the inner contour of the receiving part.

To solve this problem are further proposed according to claims 10 and 11 correspondingly matched to each other trained receiving parts or screwing.

It has surprisingly been found that it does not need to transfer the Einschraubkräfte and in particular for supporting thin-walled receiving parts provided in the prior art extensive, more or less full-surface contact of the fitting core on the inner contour of the receiving part. For this purpose, but sufficient in the circumferential direction partially, in the longitudinal direction, of course, largely complete system anyway, if the fitting core in the number of circumferentially provided investment areas and the receiving part in its wall thickness and in number and dimensions of its outer coils, which co-determine its strength, so matched are formed that a sufficient support and power transmission are ensured when screwing.

As long as these requirements are met, it is not even necessary that the webs bear against the inner contour in their entire length. They can also have interruptions.

To ensure the smooth transfer of force to the receiving part, the inner contour of the receiving part may have mutually spaced longitudinal ribs. The webs of the dowel core are then to be dimensioned so that they rest against the inner contour of the receiving part with inserted dowel core in such a way that they support the receiving part. During the screwing movement, the webs are frictionally applied to the longitudinal ribs and so transferred to the screwing on substantially full length of the receiving part on the same.

If the distances between the longitudinal ribs are greater than the thickness of the webs in the region of their outer contour, this also has the advantage that the screw-in tool can be brought out of the screwed-in receiving part more easily. Namely, the screwing-in tool can not be pulled out / pulled out only by an axial movement, but can be pulled out by slightly turning it back for the purpose of pulling it out Unscrew be loosened without loosening of the seat of the receiving part in the ground.

A similar effect can be achieved if the inner contour of the receiving part in place of the ribs has longitudinal grooves whose groove bottom, in particular multiply, is wider than the thickness of the webs in their investment area. The mating core or its webs are then dimensioned in height so that they rest against the groove bottoms with the mating core inserted in such a way that they support the receptacle part and, when screwed in for transmitting the screw-in forces, frictionally rest against the groove shoulders.

If the longitudinal grooves are wider than the thickness of the webs, the withdrawal of the dowel core from the receiving part after screwing can also be facilitated here by its seat is loosened in the receiving part by gently turning back.

This effect can be further enhanced by the fact that the areas on which abut the outer contours of the webs when screwing, in particular the groove bottoms, are shaped so that they release the outer contour of the webs when turning back the Einschraubwerkzeugs.

At the same time, these solutions have the advantage that the ribs or groove shoulders trailing in the direction of unscrewing are available for engaging the webs and thus for power transmission when the receiving part is to be unscrewed again.

To anchor the rod or post-shaped object in the receiving part, a filling material can be used, which fills the space between the end region of the article and the inner contour of the receiving part in the fastening state. The filling material can be granular (sand, split or similar) or hardening (plastic mass, concrete).

While the inventively designed receiving parts, especially because of their anchored in the ground screws after their screwing very difficult unintentionally can be torn out of the ground, a comparable hold between the receiving part and introduced therein, in particular a curing filling material such as plastic or concrete is not without further guarantees. Therefore, elevations and / or depressions and / or undercuts may be provided on the inner contour of the receiving part, which prevent tearing out of the filling material or the pole or post-shaped article anchored therein.

These elevations and / or depressions and / or undercuts can be mounted in particular in the spacing regions between ribs or between grooves which need not remain free for receiving the webs or for the radial movement of the fitting core in the receiving part. The elevations / depressions / undercuts but may for example also be formed in the ribs themselves.

Under thin-walled receiving parts are those having a wall thickness-length ratio of 8: 1000 to 1: 1000, especially 7: 1000 to 1: 1000, in particular 5: 1000 to 1: 1000, in particular 4: 1000 to 2: 1000, in particular 2 : 1000 to 8: 10000 understood.

These can be self-supporting or also designed in such a way that, when screwed in, they merely serve as formwork for a filling compound to be introduced and their dimensional stability required for screwing in is obtained only by the screwing-in tool or its fitting core.

The invention furthermore relates to the receiving parts adapted to the foundation system and in particular to the associated screwing-in tool and to the corresponding screwing-in tool with the features previously discussed.

Figur 1:

ein erfindungsgemäßes dünnwandiges Aufnahmeteil mit äußerer Schraubwendel in perspektivischer Darstellung, teilweise geschnitten mit angedeuteter Innenkontur mit Rippen;

Figur 2:

ein erfindungsgemäßes Einschraubwerkzeug mit Passkern in perspektivischer Darstellung;

Figur 3:

eine perspektivische Draufsicht auf das Innere des Aufnahmeteils von seiner - beim Einschrauben nachlaufenden -Aufnahmeöffnung her;

Figur 4:

eine Draufsicht auf das Einschraubwerkzeug von seiner beim Einschrauben voraus laufenden Spitze her; und

Figur 5:

eine schematische Darstellung einer Draufsicht auf das Innere des Aufnahmeteils von seiner Aufnahmeöffnung her mit Längsrippen bzw. Längsnuten und mit angedeuteten Anlagebereichen der Außenkonturen der Stege am Aufnahmeteil.

The object of the invention will now be described in more detail with reference to the drawings. Showing:

FIG. 1:

an inventive thin-walled receiving part with external helix in perspective, partially cut with indicated inner contour with ribs;

FIG. 2:

an inventive Einschraubwerkzeug with fitting core in a perspective view;

FIG. 3:

a perspective top view of the interior of the receiving part of his - trailing when screwing-receiving opening forth;

FIG. 4:

a top view of the Einschraubwerkzeug from his screwing ahead when screwing forth ago; and

FIG. 5:

a schematic representation of a plan view of the interior of the receiving part of its receiving opening forth with longitudinal ribs or longitudinal grooves and with indicated contact areas of the outer contours of the webs on the receiving part.

FIG. 1 shows an inventive thin-walled cone-shaped receiving part 1 with external helical coil (without reference numerals) in a perspective view, partially cut with indicated inner contour 2 with longitudinal ribs 8 and longitudinal grooves 9 with groove bottom 10 and groove shoulders 11th

FIG. 2 shows an inventive screwing 3 with axis of rotation 4 and dimensionally stable fitting core 5 with webs 6 with outer contours 7 of the webs 6 in a perspective view.

Here, the fitting core in the form shown essentially consists of the interconnected webs 6, which sit in a portion of a shaft (without reference numeral), which is intended for guiding and movement of the fitting core 5. Of course, various other designs are conceivable here, for example to save even more material / weight.

Shown is a mating core 5 with eight webs 6 of which in the perspective view, of course, only six (indicated a seventh) are visible.

In contrast, the receiving part 1 after FIG. 1 If one adds these to the total circumference of the inner contour 2 of the receiving part 1 high, then eight intermediate areas between longitudinal ribs 8 and eight longitudinal grooves 9, which are for receiving the eight webs 6 of the Passkerns 5 after FIG. 2 are determined. In between there are eight web areas or gutter areas that are available for receiving elevations / depressions / undercuts that can counteract the withdrawal of a introduced into the receiving part, in particular cast-in mast, post or the like., As is further provided according to the invention.

FIG. 3 shows a top perspective view of the interior of the receiving part 1 from its receiving opening (no reference numeral) ago.

Recognizable here are sixteen longitudinal ribs 8 and groove shoulders 11, eight intermediate areas between longitudinal ribs 8 and eight longitudinal grooves 9, for receiving the eight webs 6 of the fitting core 5, for example FIG. 2 , are determined.

In between there are eight web areas or gutter areas (without reference numerals), which are available for receiving elevations depressions / undercuts 12, which can counteract the withdrawal of a introduced into the receiving part, in particular cast mast, post or the like, as is further provided according to the invention ,

It can be seen that the eight intermediate areas between longitudinal ribs 8 and eight longitudinal grooves 9, for receiving the eight webs 6 of the fitting core 5, for example, after FIG. 2 , are determined to have a different length at their earth-side end - in pairs. This corresponds to the different length of the webs 6, as in FIG. 2 is shown and serves to maintain the strength of the tip of the receiving part 1 when penetrating into the soil.

Next shows FIG. 3 Elevations / depressions / undercuts 12, as they are useful to secure a filling material, in particular a casting material such as plastic or concrete, or the molded therein component (mast, posts, etc.) against tearing out.

FIG. 4 shows a plan view of the Einschraubwerkzeug 3 forth from his pre-screwing in the tip. Shown are eight webs 6, which are grouped around the axis of rotation 4 of the screw-3. In addition, the - is already in FIG. 2 Shown - wave (without reference numeral), which serves for guiding and movement of the passport core 5, indicated.

FIG. 5 shows a schematic representation of a plan view of the inner contour 2 of the receiving part 1 from its receiving opening forth.

Shown here are eight intermediate areas between longitudinal ribs 8 and eight longitudinal grooves 9 with groove bottom 10, for receiving the eight webs 6 of the fitting core 5, for example FIG. 2 , are determined.

In between there are eight web areas or gutter areas (without reference numerals), which are available for receiving ridge depressions / undercuts that can counteract the withdrawal of a introduced into the receiving part, in particular cast mast, post or the like, as is further provided according to the invention.

It is also shown in what way the abutment areas 13 of the outer contours 7 of the webs 6 of the fitting core 5 abut against the eight intermediate areas between longitudinal ribs 8 and eight longitudinal grooves 9 of the receiving part 1 with inserted screw-in tool 3.

List of reference numbers:

1

sleeve-like receiving part

2

Inner contour of the receiving part

3

screwing

4

Rotary axis of the screw-in tool

5

dimensionally stable fitting core

6

Stege

7

Outer contour of the webs 6

8th

longitudinal ribs

9

longitudinal grooves

10

groove bottoms

11

Nutschultern

12

Elevation / depression / Undercut

13

Investment areas of the outer contours 7 of the webs. 6

Claims (10)

1. Foundation system for aligning and fastening a rod- or post-like object in the ground, comprising a thin-walled sleeve-like receiving part (1) which is to be screwed into the ground and which, in the fastened state, receives an end region of the rod- or post-like object and surrounds its periphery at a distance at least in certain sections, and comprising a screwing-in tool (3) having an axis of rotation (4), which screwing-in tool comprises a dimensionally stable fitting core (5) which can be inserted into the receiving part (1) in order to screw in the latter and then bears against and supports the inner contour (2) of the receiving part (1), and which screwing-in tool, by being adapted in a form-fitting manner in certain regions for the purpose of installation, transmits the forces and/or torques required for installation to the receiving part (1) with a force path which is short relative to the length of said receiving part, characterized in that the fitting core (5) is formed from a plurality of webs (6) which extend radially away from the axis (4) of the screwing-in tool (3) in a star shape over a length corresponding substantially to the length of the receiving part (1) and which are adapted in their outer contour (7) over their length substantially to the inner contour (2) of the receiving part (1) in such a way that, when inserted therein, they bear substantially frictionally and/or in a form-fitting manner against the inner contour (2).
2. Foundation system according to Claim 1, characterized in that there is additionally provided a filling material which, in the fastened state, fills the space between the end region of the rod- or post-like object and the inner contour (2) of the receiving part (1).
3. Foundation system according to Claim 2, characterized in that the filling material is one which cures.
4. Foundation system according to one of Claims 1 to 3, characterized in that the inner contour (2) of the receiving part (1) has longitudinal ribs (8) which are spaced apart from one another and between which the webs (6) of the fitting core (5) inserted into the receiving part (1) bear against the inner contour in such a way that they support the receiving part (1), and against which longitudinal ribs the webs (6) bear when screwing in the receiving part (1) and also, if appropriate, when screwing it out again.
5. Foundation system according to one of Claims 1 to 4, characterized in that the inner contour (2) of the receiving part (1) has longitudinal grooves (9) whose groove base (10) is wider than the thickness of the webs (6) in the region of their outer contour (7) and the webs (6) of the fitting core (5) inserted into the receiving part (1) bear against the groove bases in such a way that they support the receiving part (1) and bear in a force-fitting manner against the groove shoulders (11) when screwing in the receiving part (1).
6. Foundation system according to one of Claims 2 to 5, characterized in that the inner contour (2) of the receiving part (1) has elevations and/or depressions and/or undercuts which provide the filling material with a purchase against its extraction or provide the pile- or post-like object anchored therein with a purchase against extraction.
7. Foundation system according to one of Claims 1 to 6, characterized in that the receiving part (1) has a wall thickness/length ratio of 8:1000 to 1:1000, in particular 7:1000 to 1:1000, in particular 5:1000 to 1:1000, in particular 4:1000 to 2:1000.
8. Foundation system according to one of Claims 1 to 6, characterized in that the receiving part (1) has a wall thickness/length ratio of 2:1000 to 8:10 000.
9. Foundation system according to one of Claims 1 to 8, characterized in that the receiving part is self-supporting.
10. Foundation system according to one of Claims 1 to 8, characterized in that the receiving part is merely formwork and the screwing-in tool confers on the latter its dimensional stability required for screwing in.

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