EP1724416A2 - Foundation system for the securing of a rod or postlike item in the ground and socket type receiving part therefor - Google Patents

Abstract

A driving tool bores a vertical hole for installation of a post in the ground. The conical tool drives a surrounding conical sleeve with an outer self-tapping thread (4) into the ground. The tool (10) has a vertical groove (11) that engages with a matching vertical rib inside the sleeve.

Description

The invention relates to a foundation system for aligning and securing a rod or post-shaped object in the ground, with a sleeve-like receiving part to be introduced into the ground, which receives an end portion of the rod or post-shaped object in the attached state and surrounds its circumference at least in sections, with a distance Filling material, which fills the space between the end portion of the rod-shaped or post-shaped object and the inner contour of the receiving part in the attached state, and with an insertion tool, which is in contact with the receiving member during insertion, according to the preamble of claim 1.

The invention also relates to a foundation system for fixing a rod or post-shaped object in the ground with a self-supporting sleeve-like receiving part to be introduced into the ground, which accommodates an end region of the rod-shaped or post-shaped article in the fastening state and with an insertion tool, which during insertion of the receiving part with This is in contact, according to the preamble of claim 2.

Finally, the invention also relates to a receiving part for the foundation systems of the types mentioned.

The foundation systems mentioned here can also be referred to as fastening systems. Both terms are used synonymously. The foundation or fastening systems are used for permanent or temporary installation of posts, masts and the like, as used for fences, information signs and panels, Laundromats are needed in gardens as well as structures of any type of wood.

In the first mentioned foundation systems according to the preamble of claim 1, the objects to be fastened are inserted with the interposition of a filling material in the receiving part, while in the second mentioned foundation systems according to the preamble of claim 2, the object to be fastened is inserted directly into the receiving part and touched it from the inside.

An attachment system of the former type is known from DE 199 60 854 A1 known. 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 may be an impact sleeve or a threaded sleeve, which is also referred to as a ground anchor. The receiving part has a cup-shaped filling section. After driving or screwing the receiving part into the ground, the rod-shaped object is inserted into the filling section, which surrounds the lower end region of the rod-shaped article 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 annulus between the lower end of the rod-shaped article and the cup-shaped filling portion is filled with the filling 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.

In the initially mentioned fastening system, the receiving parts are designed with their cup-shaped filling section predominantly as screw sleeves. In their design, they correspond to the So-called ground dowels with a receiving portion at its upper end, in which the rod-shaped object is used directly, without interposition of a filling material in the receiving portion and secured there. Such ground anchors are known in many embodiments; an example shows the DE 93 13 258 U1 , They usually consist of a lower threaded portion and the upper receiving portion. Between these two sections may also be a conical displacement section, on which also a thread can be provided.

The known ground anchors and, accordingly, the receiving part of the initially mentioned fastening device are relatively solid. Namely, the ground anchors must not only absorb the forces originating from the mast or post fastened directly thereto, but, like the receiving part of the known fastening systems, they are heavily loaded when being screwed into the ground, in particular by a long force flow path. This is especially true when a manually or mechanically actuated insertion tool engages a pin inserted transversely through the receiving portion located at the top, as is often suggested ( DE 93 13 258 U1 ). The high local load when initiating the torque can lead to a deformation of the ground dowel or receiving part, if their execution is not massive enough.

Even more so, this applies to a receiving part, which is designed as a wrapping sleeve. The impact with a heavy impact device can also lead to deformation of the impact sleeve, if in a known manner when driving an intermediate piece, for example. made of hardwood is used, unless such a drive sleeve is very strong dimensions.

As a material for the receiving part of the known fastening systems, for example, steel, hammered from 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 anchors - a combination of plastic and metal ( DE 202 20 515 U1 ). All of these embodiments are for mass-produced relatively expensive. In addition, ground anchors and receiving parts, despite the fundamental possibility of their reusability often remain in the ground when the only temporarily erected or to be fixed mast or post is removed. This is a relatively expensive manufactured part prematurely lost.

The invention is therefore based on the object, a foundation system whose receiving part is cheaper and less material to produce and which still maintains its known good performance properties in particular its dimensional stability especially when introduced into the ground, as well as to create a receiving part with these properties.

The solution to this problem takes place in a foundation system of the type mentioned initially according to the invention in that the insertion tool has 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 forces required for insertion and / or moments flatly transmits to the receiving part with respect to its length short force path and the only serving as formwork thin-walled receiving part only by its required for introduction into the ground dimensional stability granted.

For the foundation system mentioned at the beginning second solution of the task according to the invention is that the insertion tool has a dimensionally stable fitting core, which largely abuts the inner contour of the receiving part and this supports, and by at least partially positive fit in terms of insertion required for insertion Forces and / or moments flat on the receiving part with relative to its length short Kraftflussweg transfers, wherein the receiving part is thin-walled and made of plastic.

In the receiving part for a foundation system for fixing and optionally aligning a pile-shaped object in the ground the object of the invention is achieved in that the receiving part has on its inner contour over a substantial part of its length form-fitting elements, on which, with respect to the length of the receiving part, short power flow path Einbringkräfte and / or moments are introduced flat, and thin-walled and made of plastic is trained.

So that the receiving part can be made particularly thin-walled, it is important in any case that the forces required to be introduced into the ground, exerted by the fitting core on the receiving part forces are introduced into the receiving part, that the length of the power flow at the initiation of the forces as low as possible. This means that the forces exerted by the fitting core in the receiving part during insertion forces over a form fit, which is as large as possible, preferably over a large part of the length of the receiving part, in particular substantially over the entire length of the receiving part, preferably over the length of the cone-shaped portion the receiving part or in the case of a cylindrical shape of the receiving part is preferably introduced either over the entire length or at least over a substantial part of the length of the receiving part.

In the case of an impact sleeve with a conical section, it is important that the effective surface on which the impact forces act is as large as possible and distributed over a relatively long portion of the length of the receiving part, as is the case for example with a cone. The cone itself also represents a form-locking element, in which case additional surfaces for transmitting the required forces can be provided by the fitting core on the receiving part in the inner contour.

In the case of a screw, the introduction of force is at least over a length of the receiving part, which corresponds to the anchoring serving external thread, which is usually a substantial part of the total length of the receiving part. In known Schraubhülsen (which are commonly referred to as ground anchors often), however, the introduction of forces usually only in the upper region of Threaded. Therefore, a high torsional stiffness, which can be achieved only by suitable materials or wall thickness usually required in the known screw sleeves. In contrast, according to the invention, the length of the force flow is kept as low as possible upon initiation of the forces, ie the forces introduced into the receiving part by the passport core are distributed over the greatest possible length. The length over which the introduction of force from the fitting core takes place on the receiving part is provided in particular in the areas of the receiving part, which experience their greatest burden when introduced into the ground. By this form of force introduction to reach a very short power flow path, which allows to perform the receiving part very thin-walled.

In the case of the foundation system according to claim 1, it is sufficient to dimension the sleeve-like receiving part only so that it can perform its function as a formwork when it is inserted into the ground and receives on the filling material, the lower end of the rod-shaped part. When inserting the dimensionally stable fitting core of the insertion tool fills the inner contour of the receiving part largely by positive fit and supports it by the passport core is largely applied to the inner contour of the receiving part. The forces required for insertion are transferred over a large area to the receiving part. The receiving part can be made of plastic or a metallic material, for example.

In the case of the foundation system according to claim 2, a thin-walled receiving part made of plastic is provided.

By "thin-walled" is here understood a wall thickness of the plastic receiving part of the foundation system, which is significantly reduced compared to conventional screw sleeves or impact sleeves. Surprisingly, it has been found that in such plastic receiving parts even with a considerable reduction in wall thickness still a self-supporting property can be achieved, especially because of the short power flow path when introduced into the ground by means of the fitting core. The measures provided for in the interior of the receiving part interlocking elements over which the for insertion required forces and / or moments are introduced from the fitting core in the receiving part, contribute significantly to the self-supporting dimensional stability, because they extend over at least a large part of the length of the receiving part. The external thread in the screw sleeves and fin-like webs in impact sleeves on the outside are structural elements, which serve an increased dimensional stability in the sense of a self-supporting property. Self-supporting means in this context that the receiving part sufficiently holds a rod-shaped component without filling with a filler. The rod-shaped component can on the one hand be designed so that it fits substantially congruent shape in the upper region of the receiving part or is held in particular for the purpose of alignment in a Exzentereinsatzteil, as for example from the EP 0 842 342 B1 or the DE 295 122 37 U is known, wherein the specific execution of the eccentric insert part is taken in reference. If the rod-shaped component is inserted into the receiving part, so remains - if no filling material is used - the space between the receiving part and the rod-shaped component free, that is, the space formed as a ring frame space is not filled, the rod-shaped member is in the lower part of the Receiving part supported when the latter is conically tapered downwards. Self-supporting therefore means that the receiving part is stiffer than, for example, a non-self-supporting formwork whose dimensional stability is given on the one hand outside by the surrounding soil and on the other hand by filling with filling material. Self-supporting in the sense of the present invention, however, is the receiving part, if it can find application even without inner filling with sufficient dimensional stability and strength defies the significantly reduced wall thickness.

When using high-quality plastics, it is even possible to further reduce the wall thickness, without the strength properties would thereby reduced. This makes it possible to save material not only to a considerable extent and thus to produce the receiving parts of the foundation system according to the invention significantly cheaper, but the reduction in the amount of plastic used is also extremely beneficial from an ecological point of view.

A commercially available known plastic threaded sleeve of a length of, for example, 330 mm, has a wall thickness of 3.5 to 4.5 mm, at least in the upper region in which the rod-shaped or post-shaped object is used. In contrast, the wall thickness is considerably reduced in the receiving part of the foundation system according to the invention, so that wall thickness-length ratios in the range of 8: 1000 to 1: 1000, preferably between 7: 1000 to 1: 1000, more preferably between 5: 1000 to 1 : 1000 and more preferably between 4: 1000 to 2: 1000. Despite this invention very thin-walled design of the plastic receiving part, the necessary strength and self-supporting dimensional stability for anchoring a rod or post-shaped object in the ground can be achieved.

The invention makes use of the knowledge that it is sufficient to dimension the sleeve-like thin-walled receiving part solely according to its function when it is inserted in the ground and receives the lower end of the rod-shaped part. This is the steady state in which the foundation system is located. The receiving part is supported by its self-supporting property to the outside of the solidifying soil and is therefore not squeezable inwardly.

So far, the sleeve-like receiving part has been dimensioned mainly according to the stresses that occur when it is introduced into the ground by the action of the insertion tool. The insertion tool of the foundation system according to the invention, in contrast, has a dimensionally stable fitting core, which bears against the inner contour of the receiving part as far as possible and additionally supports it in this way during insertion, and by positive and frictional adjustment the forces required for insertion forces and / or moments as large as possible on the Receiving part transmits.

As a result, the dowel core during the phase of maximum load, d. H. during the introduction, the thin-walled receiving part temporarily required for incorporation into the ground increased dimensional stability. Incidentally, however, the receiving part can be dimensioned in accordance with its much lower stress in anchored in the ground permanent state. The receiving part can therefore be much smaller dimensioned and / or made of a simpler material than in the fastening systems according to the prior art. As a result, it is significantly cheaper to manufacture, which is of considerable importance for a mass-produced article.

It is not possible to specify general values for the wall thicknesses of the sleeve-like receiving parts, which apply to every application. The dimensioning of the receiving parts depends on many influences. Diameter, length and operational load of the erected rod or post-shaped object are as important as the nature of the soil in which the object is to be used. In addition, the material of the receiving part and the manner of its preparation are taken into account and in this context, the life, which is the mathematical basis of the mast or post set up.

The reduction in the wall thickness must always be seen in comparison to the wall thickness that was previously customary in a particular application. The percentage material savings in the area of the large ground dowels or foundations is the strongest; because in the hitherto customary self-supporting receiving parts, the wall thickness would be particularly high in relation to length and diameter for large recording parts. Particularly large ground dowels or foundations have therefore not been offered in plastic at all. With the thin-walled and self-supporting receiving parts according to the invention, it is even possible for the first time to produce even large and largest receiving parts made of plastic economically with sufficient strength and dimensional stability.

The achievable with the invention advantages, however, extend not only to the wall thickness, but also to the selection of the material from which the receiving parts are to consist. In many applications, it will be possible with the foundation system according to the invention to transfer to another and cheaper material for the receiving part than it was usual. For example, receptacles made of steel can be replaced by those made of plastic, or less durable plastics can be considered.

The foundation system according to the invention therefore leads to a redesign of the usual receiving parts on the basis of a clear consideration of the actual occurring load operations in each individual case. It is crucial that the fitting core of the insertion tool on the inner contour of the receiving part by form-fit and frictional adjustment largely applied at least over a large part of its length. It thereby supports the wall of the receiving part, so that this during insertion, during which the highest loads occur, retains its shape and can not be bent by excessive stress or is pressed by the environment of the soil, despite its thin-walled training.

In addition, however, the forces and / or moments required for insertion must be transmitted as extensively as possible to the receiving part. By "as large as possible" is to be understood in this context that the forces applied by the fitting core on the receiving part during insertion forces are introduced over the largest possible length of the receiving part in this. As a result, the length of the power flow when introducing the force exerted by the fitting core on the receiving part forces is minimized. This in turn makes it possible to reduce the wall thickness of the receiving part to a technical minimum.

If the receiving part is designed as a wrapping sleeve, it is important to transfer the forces in the longitudinal direction of the receiving part and thus also in the longitudinal direction of the rod-shaped object to be introduced later. So it depends on big, among other things as large as possible Force receiving transfer surfaces perpendicular to this axial direction.

If the receiving part is designed as a screw, a significant torque must be transferred from the insertion tool to the relatively weak-sized receiving part. In this case, transfer surfaces are required, which extend approximately tangentially to the mentioned axial direction.

Naturally, a thin-walled receiving part is mechanically most heavily loaded in the region of its point penetrating into the ground when it is introduced into the ground. Therefore, it is provided according to an advantageous development that the sleeve-like receiving part forms a complete dimensionally stable insertion body with inserted fitting core, which ends in his facing the ground in a cone, the partially or completely by the sleeve-like receiving part in the direction of insertion passport core is formed. After insertion of the insert body in the ground of the fitting core is removed again, so that only the receiving part for receiving a rod-shaped component remains in the ground.

The fitting core located at the lower part of the insertion tool thus penetrates the hollow-shaped sleeve-like thin-walled receiving part until it projects with the tip of its cone downwards out of the receiving part. At the same time it largely fills the interior of the receiving part by positive and frictional adjustment and thereby supports the wall of the receiving part during insertion into the ground. Above all, however, the insert body consisting of the passport core and the receiving part penetrates into the ground with the tip of the passport core. Since the receiving part is usually a mass portion that can be used only once, the insertion tool can be used over and over again, it is worthwhile to form this insertion tool of a durable material in high quality, so that it with its tip many times as an indenter into the ground can serve.

Alternatively, a configuration is possible in which the sleeve-like receiving part ends in its direction of the ground facing in a cone whose tip region is reinforced, so for example. made of a reinforced material. For example, the closed tip of the sleeve-like receiving part may be made of a different plastic than the rest of the receiving part, or the tip may be reinforced by a fiber material. Even a tip made of metal on an otherwise existing plastic receiving part is conceivable. Since the sleeve-like receiving part is due to its lower thickness in total cost in any case, the associated with this somewhat more effort is more than justified.

According to a further preferred embodiment, it is provided that the sleeve-like receiving part has at least partially a cylindrical contour. In fact, it has proven to be advantageous if the region of the receiving sleeve located in the inserted state at the top has a cylindrical shape in which the rod-shaped part can be used well in matching shape. By contrast, the lower portion of the receiving part will be predominantly cone-shaped so that it penetrates more easily into the ground. Between the conical lower area and the cylindrical contour in the upper area, there may also be a conical transition area, which serves for further compaction of the soil.

The materials that are suitable for the receiving part and the fitting core of the insertion tool depend on the particular application, wherein in addition to the load of the erected rod or post-shaped object and the mathematical life of the attachment must be considered. However, it is preferred that the fitting core of the insertion tool consists of a metallic material, preferably of steel, while for the sleeve-like receiving part, a plastic comes into question. Suitable plastics are, for example, polyamides, polypropylenes, polyethylenes and polystyrenes, which in the order listed here generally also mean an increasing service life of the receiving part in the ground.

In a particularly preferred embodiment of the foundation system according to the invention it is provided that the sleeve-like receiving part is provided on its outer circumference over at least part of its length with an external thread and forms a Eindrehkörper with inserted fitting core with this. The sleeve-like receiving part is formed in this case as a rotary sleeve or Schraubfundament and is screwed into the ground. The fitting core located on the insertion tool is in this case, so to speak, a coupling half, which is temporarily coupled with the sleeve-like receiving part to a common rotational movement during insertion. After insertion of this coupling must be released again, the fitting core of the insertion tool thus be removed again from the sleeve-like receiving part, wherein the receiving part remains in the ground. For this embodiment, the known embodiments of the usual so-called ground anchors come into question, as far as they can be realized in the invention relatively thin-walled sleeve-like receiving parts.

In this latter embodiment, the type of coupling between the fitting core and the inner contour of the sleeve-like receiving part of great importance. An advantageous embodiment provides for this purpose that the positive fit of the fitting core to the inner contour of the sleeve-like receiving part is effected by ribs which are integrally formed on the receiving part, extend in the longitudinal direction and engage in adapted longitudinal grooves of the fitting core.

In this case, the dowel core fills the entire interior of the sleeve-like receiving part on the one hand, so that a very solid drive body is created, which does not allow a change in shape of the receiving part during the screwing process. On the other hand, the receiving part is reliably taken by the aforementioned longitudinal ribs and grooves for rotation. In this type of insertion of the fitting core is pressed in its longitudinal direction in the sleeve-like receiving part; Thus, in addition, a pressing force acting in the longitudinal direction of the receiving part and the rod-shaped object to be used later adds to the introduction of the receiving part further promotes the ground. The uncoupling of dowel core and receiving part is done in a simple manner by the receiving tool with the dowel core simply pulled back axially from the receiving part.

Another type of coupling between the sleeve-like receiving part designed as a rotary sleeve and the fitting core can be effected in that according to a particularly advantageous embodiment, the threads formed on the outer circumference of the sleeve-like receiving part to the interior of the receiving part are open and form a helical profiling, the on External thread is adapted, which is formed on the outer circumference of the fitting core, wherein the engagement and disengagement of receiving part and fitting core is carried out by oppositely directed rotational movements.

In this embodiment, the fitting core and the sleeve-like receiving part form a separable threaded coupling. The dowel core is screwed with its external thread into the helical profiling of the receiving part until it fits snugly against this profiling and entrains the receiving sleeve for rotation. This type of coupling allows a particularly favorable distribution of the transfer surfaces when introducing the required insertion torque. At the same time, the receiving sleeve manufacturing technology can be carried out in a favorable manner with substantially constant wall thickness, even if it is low.

The latter design is particularly in question when large masts or posts are to be set, which are heavily loaded in operation. In this case, you will make the cone of the receiving sleeve and the dowel core elongated in relation to the largest diameter, so that a particularly slender cone is formed. With such slim cones, the material savings in terms of quantity and quality is particularly clear.

According to a further embodiment, which relates to an impact sleeve, the sleeve-like receiving part preferably at least at its front in the direction of insertion one at his Inner contour formed support section. When introducing or turning in the fulcrum sleeve, a corresponding match the inner contour of the receiving part form congruent formed on its outer contour passport core is inserted into the receiving part, and indeed so far until the outer contour of the dowel core fits snugly against the inner contour of the receiving part and one on the bottom (in Insertion direction seen) located counter surface fed on the support portion of the inner contour of the receiving part. The support portion may also be provided as a continuous or partially formed annular shoulder. The blows for driving or ramming the impact sleeve into the ground are then applied to the mating core or an additionally placed on this element, for example made of wood, wherein the forces are introduced via the annular shoulder and the preferably conical lower portion of the receiving part in the receiving part , so that the receiving part remains as a self-supporting impact sleeve after removing the dowel core in the ground. Such a receiving part may additionally have on its outer side, ie its side facing the ground, in its longitudinal direction extending fin-like webs. These webs serve on the one hand to increase the dimensional stability and improved guidance during insertion and on the other hand to counteract a rotation during alternately turning to the right and to the left of the fitting core to its release after successful introduction.

According to a second aspect of the invention, a receiving part for a foundation system for attaching and optionally aligning a rod-shaped object in the ground on its inner contour over a substantial part of its length form-fitting elements, on which, and relative to the length of the receiving part, short power flow forces and / or moments for introducing the receiving part in the ground surface and in particular form-fitting are introduced, wherein the receiving part is thin-walled and made of plastic. The advantage of the positive locking elements extending over a substantial part, if not even over the entire length of the receiving part, on the one hand consists in the fact that they are to be introduced into the receiving part for the purpose of introduction Forces are distributed over a large part of the receiving part, and on the other hand, in that these form-fitting elements contribute to increase the dimensional stability of the receiving part. As a result, the receiving part compared to conventional ground dowels or wrapping sleeves considerably thin-walled and yet made of plastic. It is thus also possible to produce receiving parts for particularly large dimensions of plastic, which were previously made exclusively of steel.

Preferably, the wall thickness-length ratios of the receiving part of the entire foundation system according to the invention are carried out in areas as have already been stated in connection with the embodiment according to claim 2.

Figur 1

zeigt ein in Längsrichtung geschnittenes hülsenartiges Aufnahmeteil in Form einer Drehhülse mit eingesetztem Passkern nach einer ersten Ausführungsform der Erfindung.

Figur 2

zeigt eine Axialschnittansicht im Gewindebereich des Fundamentsystems gemäß Figur 1.

Figur 3

zeigt das aus Figur 1 ersichtliche Aufnahmeteil ohne eingesetzten Passkern in einer räumlichen Ansicht.

Figur 4

zeigt den zu dem Aufnahmeteil gemäß den Figuren 1 bis 3 gehörenden Passkern ebenfalls in einer räumlichen Darstellung.

Figur 5

zeigt ein in Längsrichtung geschnittenes, als Drehhülse gestaltetes Aufnahmeteil mit eingesetztem Passteil gemäß einem weiteren Ausführungsbeispiel der Erfindung.

Figur 6

zeigt eine Axialschnittansicht des Aufnahmeteils in dessen Gewindebereich mit eingesetztem Passkern gemäß Figur 5.

Figur 7

zeigt eine räumliche Ansicht des Aufnahmeteils gemäß Figur 5.

Figur 8

zeigt den zu dem Aufnahmeteil gemäß Figur 7 gehörenden Passkern eines Einbringwerkzeugs.

Figur 9

zeigt ein in Längsrichtung aufgeschnittenes hülsenartiges Aufnahmeteil zum Einschlagen mit dafür angepasstem, eingesetztem Passkern gemäß einer Ausführungsform der Erfindung.

Figur 10

zeigt eine Axialteilschnittansicht im in Einbringrichtung unteren Bereich von Aufnahmeteil und Passkern gemäß der Ausführungsform nach Figur 9.

Figur 11

zeigt das Aufnahmeteil gemäß Figur 1 ohne eingesetzten Passkern in einer räumlichen Ansicht.

Figur 12

zeigt den Passkern für das durch Einschlagen in den Boden einzubringende Aufnahmeteil gemäß Figur 9 bzw. 11.

The invention will be explained in more detail with reference to exemplary embodiments. In the figures, the following is shown:

FIG. 1

shows a longitudinally cut sleeve-like receiving part in the form of a rotary sleeve with inserted fitting core according to a first embodiment of the invention.

FIG. 2

shows an axial sectional view in the threaded portion of the foundation system of Figure 1.

FIG. 3

shows the visible from Figure 1 receiving part without inserted fitting core in a three-dimensional view.

FIG. 4

also shows the passport core belonging to the receiving part according to FIGS. 1 to 3 in a three-dimensional representation.

FIG. 5

shows a cut in the longitudinal direction, designed as a rotary sleeve receiving part with inserted fitting part according to another embodiment of the invention.

FIG. 6

shows an axial sectional view of the receiving part in its threaded portion with inserted fitting core according to Figure 5.

FIG. 7

shows a spatial view of the receiving part according to Figure 5.

FIG. 8

shows the fitting to the receiving part of Figure 7 belonging passport core of an insertion tool.

FIG. 9

shows a longitudinally cut sleeve-like receiving part for insertion with adapted, inserted fitting core according to an embodiment of the invention.

FIG. 10

shows an axial sectional view in the insertion direction lower portion of receiving part and fitting core according to the embodiment of Figure 9.

FIG. 11

shows the receiving part according to Figure 1 without inserted passport core in a three-dimensional view.

FIG. 12

shows the fitting core for the introduced by being hammered into the bottom receiving part according to Figure 9 or 11th

In Figure 1, a longitudinally cut sleeve-like receiving part 1 is shown with a fitting core 10, which belongs to a foundation system according to a first embodiment of the invention and is itself a separate aspect of the invention. The illustrated receiving part 1 has in the largest part of its length the shape of a slender, elongated cone 2, which merges at its upper end into a cylindrical contour 3. Connected to the illustrated cylindrical contour 3 is an upwardly widening conical receiving region 14 for a rod-shaped or post-shaped object to be inserted, which is preferably embedded in a filling material there. Details of this type of fastening are in the DE 199 608 54 A1 and therefore omitted here for greater clarity. The cone 2 of the receiving part 1 is surrounded on the outside by an external thread 4. This forms a taper thread and serves for Screw the female part into the ground. In the illustrated embodiment, the sleeve-like receiving part 1 is closed in its tip region 5. However, the training can also be made so that the tip portion 5 omitted, the receiving part 1 is thus open at its lower end and is penetrated by the fitting core 10 of the insertion tool to be used. In this case, the sleeve-like receiving part 1 penetrates with the tip of the fitting core 10 ahead in the ground.

Figure 2 it can be seen that on the inner wall of the receiving part 1 four ribs 7 are formed, which extend substantially over the entire length of the cone 2 and also extend into the cylindrical contour 3. The position of the ribs 7 corresponds to the grooves in the fitting core 10 (see FIG. 1). The number of ribs may also be different, with naturally a greater number of ribs in the receiving part 1 and grooves in the fitting core 10 leads to a particularly uniform torque transmission and increases the force or momentary transmission surface.

FIG. 3 shows a receiving part 1 according to FIG. 1 in a perspective view. The receiving part 1 has a conical portion 2, on which an external thread 4 is mounted, which extends substantially from the tip 5 to the cylindrical portion 3, to which a likewise tapered receiving portion 14 connects. The thus formed receiving part thus has the complete shape and shape of a known screw foundation, however, despite guaranteed strength and dimensional stability (self-supporting) has a very thin wall and is made entirely of plastic. The plastic design also has the advantage that, apart from the reduced use of material through the thin walls, the external thread is completely mitangießbar without that - as in the production of a steel screw foundation - a separate welding process is required. With the arrow 15 between the figures 3 and 4 is indicated that the fitting core 10 (Figure 4) is inserted into the receiving part 1, wherein the outer contour of the fitting core 10 is designed congruent with the shape of the inner contour of the receiving part 1, so that after the insertion of the fitting core 10 into the interior of the receiving part 1, a complete insert body in the form of a driving body is formed.

FIG. 4 shows the fitting core 10, which belongs to the sleeve-like receiving part 1 shown in FIGS. 1 to 3. In Figure 4 longitudinal grooves 11 can be seen, which are incorporated in the cone body of the fitting core 10 and extend into its upper, cylindrical portion. The dowel core 10 is located on a conventional, not shown in Figure 4 insertion tool, which may be customary. In the simplest case, it consists of a rotary key 13, which is to be operated by hand. But it may also be a motor-driven Eindrehvorrichtung which is placed on a support frame on the placement point for the rod-shaped object (not shown).

For introducing the receiving part 1 in the ground, the insertion tool with the fitting core 10 is inserted into the interior 6 of the receiving part 1 (see arrow 15), wherein the longitudinal grooves 11 of the fitting core 10 must be placed on the ribs 7 of the receiving part 1. When pressure down the fitting core 10 fills the interior of the receiving part completely and thus lies completely on the inner contour, so that the thin-walled running receiving part is fully supported for the driving and short traction paths are available by long form-fitting elements 7, 11. Receiving part 1 and fitting core 10 together form the massive drive body, which does not allow deformation or damage to the outside receiving part.

Via the ribs 7 and the longitudinal grooves 11, which extend over a substantial part of the length of the drive body, in addition, the torque of the insertion tool is reliably transferred to the receiving part surface, so that it is screwed into the ground.

At the end of the screwing only needs the insertion tool with the fitting core axially upwards from the interior 6 of the receiving part. 1 to be pulled out; the receiving part 1 remains as a self-supporting Schraubfundament in the ground.

A modified embodiment is shown in Figures 5 to 8. As far as parts have remained unchanged compared to the first embodiment, the same reference numerals are used as in the figures 1 to 4 for this purpose.

Different from the first embodiment, the execution of the external thread 4 on the receiving part 1. The threads of the external thread are open to the interior 6 of the receiving part 1 out. They thus form a helical profiling 9 in the inner contour of the receiving part 1. In FIGS. 5 and 6, this helical profiling 9 can be recognized particularly well.

The mating core 12 of this embodiment is shown in Figure 8 and includes an external thread 8. The located on the mating core 12 external thread 8 and the helical profiling 9 inside of the receiving part 1 together form a form-fitting elements, the halves of a matching conical threaded coupling.

To insert the receiving part 1 in the ground of the fitting core 12 of the insertion tool is inserted into the interior 6 of the receiving part 1 until the threads of the located on the mating core 12 external thread 8 engage in the helical profiling 9 of the receiving part 1. By further rotation, the conical screw is pressed into each other until the flanks of the external thread 8 form a torque transmitting relatively large contact surface with the helical profiling 9 of the receiving part 1 and take this rotationally.

Here, too, the mating core 12 reliably fills the interior 6 of the receiving part 1, whereby it is reliably supported during insertion. At the same time, the torque for introducing the receiving part 1 in the ground over a large area and thus transmitted safely.

Upon completion of the Einbringvorganges first located on the insertion tool fitting core 12 must be turned back a bit and then pulled out of the interior 6 of the receiving part 1.

FIGS. 9 to 12 show a further exemplary embodiment.

FIG. 9 shows a complete insertion body with receiving part 1 and fitting core 16 in a spatial view, the receiving part 1 being cut open in the longitudinal direction. The receiving part 1 has a conical region 2 and a cylindrical region 3 and is formed in its inner contour so that the inner contour completely conforms to the outer contour of the fitting core 16. The receiving part 1 is taken as a complete insert body together with the fitting core 16 in the ground, wherein the fitting core 16 is subsequently removed. The receiving part 1 remains in the ground and receives a aufzustellendes and previously aligned rod-shaped component. The latter can also be cast in the receiving part, held by means of a filling or an eccentric insert part. So that the impact forces, which are applied to the fitting core 16, can be reliably and essentially introduced over a relatively large area into the receiving part 1, but the receiving part 1 can still be extremely thin-walled and thus material-saving, is on the inner contour of the receiving part. 1 an annular shoulder 17 (see FIG. 10) is formed on which a ring shoulder correspondingly formed on the fitting core 16 in matching shape is supported when the fitting core 16 is inserted completely. About this positive connection and the positive connection and frictional engagement in the tapered region 2 between the fitting core 16 and the receiving part 1, the impact forces are distributed to the receiving part, that the length of the power flow at the initiation of the forces is minimized. The insertion forces are thus introduced on the one hand via the annular shoulder 17 and on the other hand over the effective area (projection area in the axial direction) of the conical region 2. The larger the conical region, ie the greater the difference between its smallest and its largest diameter, the stronger the displacement effect of the invention Fixing system, the more uniform but on the other hand, the Einbringkräfte can be transferred to the receiving part 1.

In Figure 11, the receiving part 1 is shown with its interior 6 in a perspective view.

FIG. 12 also shows a perspective representation of the associated fitting core 16, the arrow 15 indicating that the fitting core 16 is inserted into the interior 6 of the receiving part 1 so that a situation is reached when fully inserted, as shown in FIG is shown.

According to one embodiment of the self-supporting variant, a plastic receiving part has a length of about 450 mm and a wall thickness of at most about 2 mm, being used as plastic polypropylene (PP).

List of reference numbers:

1

sleeve-like receiving part

2

cone

3

cylindrical contour

4

External thread on the receiving part

5

tip area

6

inner space

7

Ribs (Figures 1 to 3)

8th

External thread on the dowel core 12 (FIGS. 5, 6 and 8)

9

helical profiling in the interior of the receiving part

10

Pass core (FIG. 4)

11

longitudinal groove

12

Pass core (Figure 8)

13

rotation key

14

conical reception area

15

Insertion direction of the fitting core in the receiving part

16

Pass core (FIG. 12)

17

annular shoulder

Claims (13)

Foundation system for aligning and fixing a rod or post-shaped object in the ground,
with a sleeve-like receiving part to be introduced into the ground, which in the state of attachment receives an end region of the rod-shaped or post-shaped object and surrounds its circumference, at least in sections, at a distance,
with a filling material, which in the state of attachment fills the space between the end region of the rod-shaped or post-shaped object and the inner contour of the receiving part,
and with an insertion tool, which is in contact with the receiving part during insertion,
characterized,
in that the insertion tool has a dimensionally stable fitting core (10, 12, 16) which largely bears against the inner contour (6) of the receiving part (1) and supports it by at least partially positive fitting in the sense of insertion, the forces required for insertion and / or Momentary surface on the receiving part (1) transmits relative to its length short force path and the only serving as formwork, thin-walled receiving part only by its required for introduction into the ground dimensional stability granted. Foundation system for aligning and fixing a rod or post-shaped object in the ground,
with a self-supporting sleeve-like receiving part which is to be introduced into the ground and which, in the state of attachment, receives an end area of the rod-shaped or post-shaped object,
and with an insertion tool, which is in contact with the receiving part during insertion,
characterized,
in that the insertion tool has a dimensionally stable fitting core (10, 12, 16) which largely rests on the inner contour of the receiving part (1) and supports it, and by means of at least partially positive fitting in the sense of insertion the forces and / or moments required for the insertion on the receiving part (1) transmits with respect to its short short power flow path, wherein the receiving part (1) is thin-walled and made of plastic. Foundation system according to claim 1 or 2, characterized in that the sleeve-like receiving part (1) ends in its direction of the ground facing the insertion in a cone (2) whose tip region (5) is reinforced. Foundation system according to one of the preceding claims, characterized in that the sleeve-like receiving part (1) at least partially has a cylindrical contour (3). Foundation system according to one of the preceding claims, characterized in that the fitting core (10, 12, 16) of the insertion tool made of a metallic material, in particular steel. Foundation system according to one of the preceding claims, characterized in that the sleeve-like receiving part (1) with inserted fitting core (10, 12, 16) forms together with this an insertion body, which ends in its direction of the ground facing in a cone (2), the Partially or completely formed by the sleeve-like receiving part (1) in the insertion direction by cross fitting core (10, 12, 16). Foundation system according to one of the preceding claims, characterized in that the sleeve-like receiving part (1) at its outer periphery at least over part of its length with a External thread (4) is provided and forms a Eindrehkörper together with this inserted core (10, 12) together with this. Foundation system according to claim 7, characterized in that the positive fit of the fitting core (10) to the inner contour of the sleeve-like receiving part (1) by ribs (7), which are integrally formed on the receiving part (1), extend in the longitudinal direction and in adapted longitudinal grooves (11) of the fitting core (10) engage. Foundation system according to claim 7, characterized in that the external thread (4) webs, which are open to the interior of the receiving part (1) and form a helical profiling (9), which is adapted to an external thread (8), the outer The circumference of the fitting core (12) is formed, wherein the engagement and disengagement of receiving part (1) and fitting core (12) takes place by oppositely directed rotational movements. Foundation system according to one of claims 1 to 5, characterized in that the sleeve-like receiving part (1) at least at its front in the insertion direction of a formed on its inner contour supporting portion (17), in particular an annular shoulder, on which is supported during introduction of the dowel core , Foundation system according to one of claims 1 to 10, 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, in particular 2: 1000 to 8: 10000. Receiving part (1) for a foundation system, in particular with the features according to claims 1 to 11, for attaching and optionally aligning a pile-shaped object in the ground, which on its inner contour over a substantial part of its length form-fitting elements (7, 9, 17) over which, with respect to the length of the receiving part, short force flow path Einbringkräfte and / or moments are introduced flat, and is thin-walled and made of plastic. Receiving part according to claim 12, characterized in that its wall thickness-length ratio 8: 1000 to 1: 1000, in particular 7: 1000 to 1: 1000, in particular 5: 1000 to 1: 1000, in particular 4: 1000 to 1: 1000 or in particular 4: 1000 to 2: 1000, in particular 2: 1000 to 8: 10000.

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