EP3272958A1 - Structural element for heat insulation - Google Patents

Abstract

Component for thermal insulation between two components, in particular between a building (A) and a cantilevered outer part (B), consisting of an insulating body (2) to be arranged between the two components and of reinforcing elements in the form of at least tensile reinforcement elements (3), which in the installed state of the component (10) extend substantially horizontally and transversely to the substantially horizontal longitudinal extension of the insulating body through the latter and in each case protrude in the horizontal direction relative to the insulating body and in this case can be connected to one of the two components preferably consisting of concrete. In this case, the tensile reinforcement elements (3) are formed as multi-part composite elements in that they have at least in the region of the insulating body (2) a central rod portion (3 a) of fiber-reinforced plastic material and in a region outside of the insulating body (2) a separate anchoring rod portion (3 b) with at least partially deviating from the medial rod portion (3a) geometric and / or material properties, wherein the anchoring rod portion (3b) and the middle rod portion arranged substantially aligned with each other and at least indirectly to each other and wherein the anchoring rod portion (3b) for fixing to the central rod portion (3a) with an inner anchoring element cooperates, which engages in a radial inner region of the central rod portion. The medial rod portion (3a) has on its radially outer side an annular radial support member and / or a radial support portion (3ab) with fibers (3f) extending at least partially in the circumferential direction of the middle rod portion (3a), wherein inner anchoring portion (3v) and radial support portion (3ab) overlap at least partially radially.

Description

The present invention relates to a component for thermal insulation according to the preamble of patent claim 1.

In the prior art, various embodiments of components for thermal insulation are known, which mainly serve to overhang buildings overhanging building parts such as balcony slabs through a thermally insulated component joint. The integrated reinforcement elements provide the necessary force or torque transmission, while the insulating body is responsible for complaining to one another of the two components while leaving a joint thermally insulated from one another.

As a rule, tensile reinforcement elements are provided in the relevant prior art, which are usually made of a rod material made of metal, which consists in particular in the region of the insulating body made of stainless steel and in the area outside of the insulator made of reinforcing steel. Stainless steel is used in the region of the insulating body or the component joint on the one hand because of its corrosion resistance and on the other hand because of its poor thermal conductivity and is therefore preferable to the reinforcing steel material in the region of the insulator. The reinforcing steel material, however, is usually used in the area outside of the insulator, where it depends on the corrosion resistance and the thermal insulation properties, since the reinforcing steel extends completely in the area of one of the two components.

More recently, efforts have been made to further optimize the thermal insulation components, attempting to manufacture the plastic material tensile reinforcement elements, which until then have been almost entirely made of metal, because it is significantly less expensive than stainless steel and also has a poorer thermal conductivity than stainless steel. An example of such a device for thermal insulation with tensile reinforcement elements made of plastic material is the DE-U 20 2012 101 574 refer to. The tensile reinforcement elements referred to in this document as Zugentlastungsstangen are made of fiberglass reinforced plastic, wherein two mutually adjacent rods may each be connected to each other via a transverse plate at their ends in order to achieve a higher and more stable Zugkraftübernahme. This cumbersome and installation problems in the connection of the component reinforcement causing anchoring two Zugentlastungsstangen means of a transverse plate can be easily seen that tensile reinforcement elements made of plastic are especially poorly anchored in the adjacent components, if they are smooth-walled as in the described prior art and therefore a End anchorage in the form of a transverse plate need.

An alternative solution for the use of tensile reinforcement elements of fiberglass or carbon fiber reinforced plastic material can be the WO-A 2012/071596 remove, in which the Zugbewehrungselemente consist of closed loops that form a positive connection with the adjacent component due to their loop shape and thus provide the required anchorage. Loop-shaped tensile reinforcement elements have been repeatedly proposed in the prior art; however, they presented significant drawbacks because of their short embedment in the adjacent member and their consequent inferior ability to transfer greater tensile forces, the loop form itself regularly causing collision with the connecting armor and thus, similar to the transverse panels previously described, for installation problems.

These components for thermal insulation with tensile reinforcement elements made of plastic material could not prevail so far, since their anchoring in the adjacent components led to previously unresolved problems: For either the Zugbewehrungselemente must by special geometries (eg loop shape, cross plates and the like) a strong positive connection with the enter adjacent component, which in turn provides for installation problems due to the arranged in this area connection reinforcement; or you have to try the existing fiber reinforced plastic tensile reinforcement elements of pipe or rod material with at their However, the anchoring of these ribbed plastic Zugbewehrungselemente in the adjacent component suffers that the fiber-reinforced plastic on the one hand and the concrete material of the adjacent component on the other hand usually have so much different Temperaturdehnzahlen that inevitably different temperature-related relative movements arise , which cause stresses or strains in the mutual contact area. This leads to destruction by shearing either the ribs or the so-called concrete brackets between the ribs. It follows that the tensile reinforcement elements usually can no longer fulfill their function.

Another disadvantage of the tensile reinforcement elements made of plastic material is the lack of subsequent flexibility compared to steel, which makes it necessary that the desired shape and length of the tensile reinforcement elements is already taken into account in the rod manufacturing. As a result, the number of to be held in stock tensile reinforcement elements increases considerably due to correspondingly high number of variants, which means significant disadvantages logistically.

Starting from this prior art, it is the object of the present invention to improve a thermal insulation component having the features of the preamble of claim 1, in particular by avoiding the described disadvantages of tensile reinforcement elements made of plastic material and in particular an improved anchoring of the tensile reinforcement elements in the adjacent Concrete components allows.

This object is achieved by a device for thermal insulation with the features of claim 1 or with the features of claim 6.

Advantageous developments of the invention are the subject matter of the dependent claims, the wording of which is hereby incorporated by express reference into the description in order to avoid unnecessary text repetitions.

According to the first solution according to the invention, it is provided that the tensile reinforcement elements are thereby formed as multipart composite elements, in that at least in the region of the insulating body they have a central rod section made of fiber-reinforced plastic material and in a region outside the insulating body a separate anchoring rod section with at least partially deviating geometric and / or material properties from the middle rod section such that the anchoring rod section and the middle rod section are substantially aligned with each other and at least indirectly against each other are fixed, that the anchoring rod portion for fixing to the middle rod portion cooperates with an inner anchoring element, which engages in a radially inner region of the central rod portion, and that the middle rod portion has on its radially outer side an annular radial support member.

According to the second solution according to the invention, it is provided that the tensile reinforcement elements are designed as composite composite elements in that they have a central rod section made of fiber-reinforced plastic material at least in the region of the insulating body and a separate anchoring rod section in a region outside the insulating body with geometrical and / or at least partially deviating geometric sections. or material properties such that the anchor rod portion and the center rod portion are substantially aligned and at least indirectly fixed to each other such that the anchor rod portion for attachment to the center rod portion cooperates with an inner anchor member engaging a radially inner portion of the middle rod portion and the middle rod portion has a radial support portion extending at least partially in the circumferential direction of the center rod portion Fibers, wherein inner anchoring area and Radialabstützungsbereich overlap at least partially radially.

The material combination of the composite composite elements is based on the finding that you do not have to forego the particular advantages of the plastic material in the region of the insulating, just because you prefer in the region of the adjacent component, the plastic material because of the anchoring issue by other materials or geometries, in particular would like to replace ribbed steel. The result is thus the said multi-part composite element with an unusual component mix, by being at least in the region of the insulating body of a corrosion-resistant and very consists of poorly heat-conducting fiber-reinforced plastic material and have other geometric or material properties outside of the insulator and can be adapted to the installation conditions in the adjacent components. This has been proven in the case of conventional metal tension rods, which usually have in the region of the insulator a center rod portion made of stainless steel and outside the insulator anchoring rod sections made of reinforcing steel.

Surprisingly, this composite element surpasses the previously known tensile reinforcement elements in every respect, but nevertheless makes it possible to select the materials used with regard to their individual advantages for the different requirements in the insulating body or in the adjacent components and to disregard disadvantageous materials or geometries. So you can use a center rod section of fiber reinforced plastic in the region of the insulator, which is cheaper and much less heat conductive than the stainless steel used there, while in the field of adjoining concrete components in thermally conductive terms is not subject to any special requirements and therefore with the cost, easy can handle and subsequently bendable reinforcing bars work, which can provide with appropriate external profiling also easy and inexpensive for optimal anchoring in the adjacent concrete components.

As already mentioned above, the anchoring rod portion and the middle rod portion are arranged in alignment with each other and at least indirectly fixed to each other. This must be done in such a way that the mutual connection of the central rod section and anchoring rod section can reliably transmit the tensile forces occurring there. To achieve this, the present invention proposes that the anchoring rod portion for fixing to the center rod portion cooperates with an inner anchoring element which engages in a radially inner region of the central rod portion, and that according to a first inventive solution, the middle rod portion has on its radially outer side an annular radial support member and or that, according to a second solution according to the invention, the middle bar section has a radial support area at least partially extending in the circumferential direction of the central rod portion fibers, wherein inner anchoring region and Radialabstützungsbereich overlap at least partially radially.

The use and fixing of the inner anchoring element in the middle bar section alone would possibly not be sufficient in the fiber-reinforced plastic material used for the middle bar section to transmit the tensile forces occurring without destruction. For this reason, the annular radial support member is provided on the radially outer side of the central rod portion and thus ensures that the center rod portion can not expand in the radial direction and / or fray or delaminate. The radial support member thus engages around the center rod portion like a ferrule and intercepts any radially acting transverse forces transmitted from the inner anchoring member to the center rod portion.

The radial support element can perform its function particularly effectively and reliably when the radial support element is arranged in the same axial section of the middle rod section in which the inner anchoring element is located. In this case, the radial support element overlaps the inner anchoring element with the interposition of the central rod section and ensures by the support that the connection between the inner anchoring element and the middle bar section is maintained, since the middle bar section can not escape in the radial direction outward when tensile stresses occur.

The inner anchoring element and / or the radial support element expediently extend as far as the free end of the middle bar section on which the middle bar section is fixed to the anchoring bar section; because especially at the free end of the radial support is most important, because there the middle rod portion is not held in the axial direction and thus can counteract the radial support element of a radial waiting.

In order to avoid unnecessary accumulation of material and a concomitant deterioration of the thermal insulation properties of the center rod portion, it is recommended that the radial support member and / or the Radialabstützungsbereich only in relation to the insulating body projecting axial region the center rod portion is arranged. For if the annular Radialabstützungselement or the additional at least partially extend in the circumferential direction of the central rod portion extending fibers of Radialabstützungsbereichs into the axial region of the insulator or even under its traversal to the other opposite the insulating body projecting side of the central rod portion, this would inevitably Increased material cross-section of the central rod portion in the region of the insulating and thus created an additional cold bridge, which is just to avoid by the use of fiber-reinforced plastic material for the center rod section. It is even more advantageous in this context if the radial support element and / or the radial support region are even arranged somewhat spaced from the insulating body, in order to avoid any cold bridge effects with respect to any sheaths of the insulating body.

In order to ensure the exact positioning of the annular Radialabstützungselements and thus its reliable function, it is recommended that the radial support member has a radially inwardly projecting stop and the stop acts on the free end of the central rod portion located end face of the central rod portion at least indirectly. This stop not only ensures that the radial support element is placed exactly in the overlapping area with the inner anchoring element, but also that the radial support element during transport and when installed in the axial direction can not slip out of its intended end position out.

Optionally, the stop of the annular radial support member may also be at least indirectly connected to the inner anchoring element, which also provides a Verlierersicherung and fixing the position of the Radialabstützungselements available.

Similar effects and advantages are achieved by the radial support region of the central rod section with fibers extending at least partially in the circumferential direction of the middle rod section, the inner anchorage region and the radial support region overlapping at least partially radially and in particular inner anchoring area and radial support area are arranged at least partially in the same axial section of the middle bar section.

In this case, the fibers extending in the circumferential direction of the middle rod section, which are preferably arranged in the radial outer region of the middle rod section, ensure that the connection between the inner anchoring element and the middle rod section is maintained, since the middle rod section can not escape outward in the radial direction when tensile loads occur.

The inner anchoring area and / or the radial support area expediently extend as far as the free end of the middle bar section at which the middle bar section is fixed to the anchoring bar section; because especially at the free end of the radial support is most important, because there the middle rod portion is not held in the axial direction and can counteract by the running circumferentially fibers of a radial waiting.

Since Zugbewehrungselemente usually extend between the two adjacent to the component for thermal insulation components and projects sufficiently far into these components in order to receive a tensile force transmitting anchoring with the components, it is recommended that the middle rod portion of a Zugbewehrungselementes at its two free ends each having an anchoring rod portion. Thus, the advantages of the composite element in both components and thus at both ends of the tensile reinforcement elements can be made available.

Since the reinforcing steel of the terminal anchoring rod sections must meet a minimum concrete coverage for corrosion protection reasons, the anchoring rod sections, if they are made of steel and in particular of reinforcing steel, may not extend as far as the insulating body in order to prevent corrosion of the anchoring rod sections. In this case, the fixing of the anchoring rod section on the middle rod section should take place outside the insulating body in a region which is protected from corrosion by the required minimum concrete cover.

However, the spacing of the connection region from the insulating body can still be exploited for a further significant effect and advantage: Conveniently, the middle rod portion is formed on its radially outer side substantially smooth-walled at least in the region between the insulating body and its free end. This avoids excessive bonding between the center rod portion and adjacent member material surrounding the center rod portion and forms a buffer zone which ensures that the flexural rigidity of the tensile reinforcing members does not abruptly but only gradually as they leave the insulator body and enter the adjacent component changes. For an abrupt jump in stiffness would lead to high loads in the tensile reinforcement element as well as at the leading edge of the adjacent component: on the one hand, the excessively high loads can cause a delamination of the tensile reinforcement element consisting of fiber-reinforced plastic material; On the other hand, the building material may flake off at the leading edge of the adjacent component, which in turn would destroy or reduce the required minimum concrete coverage and thus eliminate the corrosion protection for the tensile reinforcement member.

The essentially smooth-walled middle section thus serves to prevent the tie reinforcement element from being anchored close to the joint in the adjacent component, so that anchoring only takes place in the connection region to the anchoring rod section and the anchoring rod section itself. By displacing the connection region away from the joint-proximal edge region or from the insulating body into the adjacent component, the length of the sections of the tensile reinforcement element with reduced bending stiffness is increased. As a result, the tensile reinforcement elements clamped in this way are generally more flexible and significantly better able to follow temperature-related relative movements between the adjacent components in the transverse or thrust direction. This increase in the flexural or translucent softness avoids too rapid or severe fatigue of the tensile reinforcement elements.

While in the prior art instructions are to be found to the effect that the free, ie not radially supported length of existing of fiber reinforced plastic material tensile reinforcement element between the two clamping points must be as short as possible to the total elongation of To keep Zugbewehrungselementes in the axial direction as small as possible, the object of the present invention, such an increase in the axial expansion deliberately in purchasing by the clamping points are moved away from the insulating body in the adjacent components, thereby making the Zugbewehrungselemente biegeweicher, which advantageously the desired reduction in material fatigue result.

In other words: If, as usual in the prior art, a tensile reinforcement element consisting of a plastic material was provided with a ribbed jacket surface and inserted directly into an adjacent concrete component and anchored there, the region with reduced bending stiffness would be limited to the dimensions of the insulating body. It is obvious that such a too rigid tensile reinforcement element would not be able to sufficiently follow the usual temperature-related relative movements of the two adjacent components. At the same time, the tensile reinforcement element in the transition region between insulator and adjacent component would have a stiffness jump due to the abrupt transition between the different surrounding materials, which would lead to excessive and possibly destructive loads on the tensile reinforcement element as well as the material of the adjacent component.

In order to provide the required anchoring of the tensile reinforcement elements in the adjacent components, the anchoring rod portion should extend in the installed state from the connection region with the middle rod portion in the horizontal direction over a length L ₃ , which is at least twenty times as large as the diameter dv of anchoring rod portion. This ensures that the tensile reinforcement elements according to the invention without Endverankerungen such as transverse plates, loops, etc. can be used and still provide the desired anchorage and even against the background, that the smooth-walled portion of the central rod portion between insulator and terminal area and the terminal area itself hardly contributes to anchorage.

As in the case of the known tensile reinforcement elements, it is also possible here to produce the tensile reinforcement element from a tube or bar material both in the region of the anchoring rod section and, above all, in the area of the middle bar section. However, in the case of the center rod portion, when using a pipe material, it must be ensured that the inner anchor member can be fixed and anchored reliably on the radially inner side of the center rod portion.

As regards the materials of the multi-part composite element, ie the tensile reinforcement element, it is preferred that the anchoring rod section consists of reinforcing steel, which has a coefficient of thermal expansion, ie a thermal expansion in the order of magnitude of thermal expansion or thermal expansion of concrete and thus non-destructive corresponding temperature-induced deformations or Strains of the concrete can follow. Furthermore, it is preferred that the middle rod portion of the Zugbewehrungselements consists of glass fiber reinforced plastic material, which is sufficiently resilient in the direction of tensile force and on the other hand has a poor thermal conductivity, which is desired in the region of the insulating body. It should be noted that the term "fiber-reinforced plastic material" also includes such fiber reinforcements, in particular glass fiber reinforcements whose fiber content, in particular glass fiber content is higher than 85 wt .-%, so that the weight of the matrix material used in addition to the fibers, such as resin less than 15% compared to the weight of this reinforcing element.

By virtue of the fact that the anchoring rod sections are preferably made of steel, they can be anchored in the adjacent components in a conventional manner, without this - as in the case of fiber-reinforced plastic rods - by exotic deformations (in the form of the mentioned transverse plates, loops, etc.) and installation problems caused thereby would have to be bought with the connection reinforcement or when using profiled plastic rods by damage in the mutual investment area, which are caused by the different Temperaturdehnzahlen of concrete on the one hand and plastic rod on the other hand. In the case of reinforcing bars made of steel, however, such an anchoring is usually carried out by a ribbing of the lateral surface the reinforcing bars, whereby this ribbing can be easily introduced during the manufacturing process of these reinforcing elements.

As far as the annular radial support element is concerned, this should preferably be made of metal and in particular stainless steel. Especially if the distance between the axial position of the radial support element from the insulating body or the component joint is comparatively small, one must ensure sufficient concrete coverage to prevent corrosion of the radial support element.

Alternatively, the annular radial support element made of plastic and in particular of fiber or glass fiber reinforced plastic, which is of course especially in terms of the corrosion problem of advantage.

Like the fibers of the middle rod section, it is recommended for the fibers extending in the radial support region at least partially in the circumferential direction of the middle rod section that these fibers are glass fibers. In addition, there are advantages in using moderately transparent matrix material of the center portion of colored fibers so as to easily identify the radial support area from the outside and thereby facilitate proper assembly of the anchoring portion and central portion.

Particularly important for the function of the composite element according to the invention is that the anchoring rod portion and the middle rod portion are reliably and resiliently fixed to each other. For this purpose, it is recommended that the inner anchoring element is fixed in a form-fitting, non-positive and / or cohesive manner and in particular via an adhesive bond and / or screw in the middle bar section. This usually takes place shortly before the anchoring rod is to be fixed to the middle rod section. Likewise, however, the inner anchoring element can also be fixed or anchored at an earlier point in time, and in particular already during the production of the middle bar section in the middle bar section, for example by being molded into it during extrusion and, in particular, by lamination.

Depending on the way in which the inner anchoring element is fixed in the middle rod section, various connection techniques for fixing the inner anchoring element to the anchoring rod section are also recommended. So this can be fixed in a form-fitting, non-positive and / or cohesive manner and in particular via a welded joint on the anchoring rod section. A welded connection is particularly useful when the inner anchoring element is formed in the middle rod portion and represents a so-called Welding insert. In this case, the anchoring rod section can be connected to the welding insert by means of induction welding, laser welding or similar suitable welding methods.

Another advantageous connection technique is that the inner anchoring element is integrally formed on the anchoring rod portion and / or is part of the anchoring rod portion. In this case, one can insert the anchoring rod portion together with the inner anchoring element in the middle rod portion and set there. If the inner anchoring element has an external thread, then it is possible to screw the anchoring rod section together with the inner anchoring element into the middle rod section.

In order to ensure a sufficiently zugsichere fixation of the anchoring rod portion at the middle rod portion, it is recommended that the inner anchoring element engages over an axial length L ₅ in the radial inner region of the central rod portion which is at least 4 times and more preferably at least 5 times as large as the Diameter d _{M of} the middle bar section. For the first inventive solution, it is also recommended that simultaneously (or alternatively) the annular radial support member has a length L ₄ in the axial direction, which is at least 1.5 times and more preferably at least 2 times as large as the diameter d _M of center rod section.

In the case of the second solution according to the invention, it is recommended that the radial support region with fibers extending at least partially in the circumferential direction of the middle rod section has a length L ₂ in the horizontal direction which is at least 1.5 times and more preferably at least 2 times and at most 15 times. times and particularly preferably at most 12 times as large as the diameter dv of the anchoring section.

In order to be able to provide the necessary anchoring of the tensile reinforcement elements in the adjacent components, the anchoring rod section should extend in the installed state from the connection region in the horizontal direction over a length L ₃ which is at least 15 times and particularly preferably at least 20 times as great is like the diameter dv of the anchoring section. This ensures that the tensile reinforcement elements according to the invention can be used without end anchors such as transverse plates, loops, etc. and yet can provide the desired anchoring and even against the background that the smooth-walled portion of the central portion between insulator and terminal area and the terminal area itself hardly contributes to anchorage.

The thermal insulation element according to the invention expediently has, in addition to the tensile reinforcement elements - as is also known from the relevant prior art and as is customary in such components for thermal insulation - pressure elements and / or transverse force elements for compressive force and / or transverse force transmission between the adjacent components ,

As far as in the present case with respect to the material of the adjacent components, so in particular the building and the projecting outer part of concrete is mentioned, it should be understood hereunder any form of a hardening and / or settable building material, in particular a cementitious, fiber-reinforced building materials such as concrete, such as high-strength or ultra-high-strength concrete or high-strength or ultra-high-strength mortar, a synthetic resin mixture or a reaction resin mixture.

Figur 1

ein erfindungsgemäßes Bauelement zur Wärmedämmung in schematischer und teilweise geschnittener Seitenansicht;

Figur 2

ein alternatives erfindungsgemäßes Bauelement zur Wärmedämmung mit einer ersten Ausgestaltungsform zur gegenseitigen Festlegung eines Mittelstababschnitts und eines Verankerungsstababschnitt gemäß einer ersten erfindungsgemäßen Lösung;

Figur 3

ein weiteres alternatives erfindungsgemäßes Bauelement zur Wärmedämmung mit einer zweiten Ausgestaltungsform zur gegenseitigen Festlegung eines Mittelstababschnitt und eines Verankerungsstababschnitt gemäß einer zweiten erfindungsgemäßen Lösung; und

Figuren 4a - 4f

weitere verschiedene Ausgestaltungsformen zur gegenseitigen Festlegung von Mittelstababschnitt und Verankerungsstababschnitt.

Further features and advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the drawings; show here

FIG. 1

an inventive device for thermal insulation in a schematic and partially sectioned side view;

FIG. 2

an alternative inventive element for thermal insulation with a first embodiment for mutually fixing a central rod portion and an anchoring rod portion according to a first inventive solution;

FIG. 3

a further alternative element according to the invention for thermal insulation with a second embodiment for mutually fixing a center rod portion and an anchoring rod portion according to a second inventive solution; and

FIGS. 4a-4f

Further different embodiments for mutual determination of center rod section and anchoring rod section.

FIG. 1 shows a component for thermal insulation 1 with a multi-part cuboid insulating body 2, which is intended to be arranged in a between two concrete components (which are not shown here, but whose position is indicated only by the reference numerals A, B) component groove to be arranged and this two concrete components A, B from each other in a thermally insulated manner to space. The insulating body 2 is composed of several parts to allow the installation of reinforcing elements in the form of tension rods 3, in the form of transverse force bars 4 and in the form of pressure elements 5.

The arrangement of the reinforcing elements takes place in the manner known and customary in the prior art, namely by the tensile reinforcement elements 3 are arranged in the upper region, the so-called tensile zone of the insulator 2, which extend in the installed state in the horizontal direction and the tensile force transmission between the both components A, B connected to the component for thermal insulation serve and are anchored in these components for this purpose. In the lower area, the so-called pressure zone of the insulating body 2, the pressure elements 5 are arranged, and indeed with a horizontal direction of extent, but they do not or only slightly protrude from the insulating body 2. Finally, transverse force rods 4 are still proceeding, which are inclined in the area inside the insulating body 2 to the horizontal run and the costs to be absorbed by the reinforcing elements of the component for thermal insulation accordingly extend from the tension zone on one side of the insulator obliquely downward in the pressure zone on the other side of the insulator, there to angled vertically in the direction of the tensile zones and then to a further bend to run parallel to the tensile reinforcement elements.

Essential for the present invention are now the tensile reinforcement elements 3, which are designed as multi-part composite elements with a rod-shaped center rod portion 3a of fiber-reinforced plastic and rod-shaped anchoring rod sections 3b made of reinforcing steel. The center rod portion 3a extends in the region of the insulating body 2 in the horizontal direction and projects on both sides of the insulating each with its free end 7 in the horizontal direction, where it is arranged in each case with this projecting area in the installed state in the region of the adjacent components A, B. , Both anchoring rod portions 3b are arranged in alignment with the middle rod portion 3a and respectively fixed to one of the two free ends 7 of the middle rod portion 3a.

The middle rod portion 3a has on its radial outer side in the region of the free ends 7 on the one hand, namely on the in FIG. 1 Right free end 7, an annular radial support member 6, which rests flat on the outer surface of the central rod portion and is fixed in this position by gluing. In this Radialabstützungselement 6 is in connection with the embodiment according to FIG. 2 discussed in more detail. And on the other hand, namely at the in FIG. 1 left free end 7 of the center rod portion 3a, a Radialabstützungsbereich 16 is shown, to which in connection with the embodiment according to FIG FIG. 3 will be discussed in more detail.

The axial extent by which the center rod portion 3 a protrudes from the insulating body 2 is L ₁ + L ₂ , wherein the length L ₁ the axial distance of the radial support member 6 from the insulator 2, the length L _{2 of} the length of the radial support portion 16 in the axial direction and the Length L ₄ corresponds to the length of the radial support element 6 in the axial direction, wherein in FIG. 1 the lengths L ₂ and L _{4 are the} same size.

The length L ₃ finally indicates the extent to which the anchoring rod section ₃ b extends from the radial support element 6 or the end face 8 of the middle rod section _{3 a} into the component A. FIG. 1 does not show the full length of the anchoring rod portion 3a and thus also corresponds to the measure of the length L ₃ in FIG. 1 not the total length of the anchoring rod section 3b.

The center rod portion 3a has a diameter d _M which is larger than the diameter dv of the anchor rod portions 3b.

• Figur 2 zeigt eine alternative Bauform eines Bauelements 11 zur Wärmedämmung, wobei gleiche Bauteile wie in Figur 1 mit denselben Bezugszeichen versehen sind. Wie bereits in Figur eins am rechten freien Ende 7 des Mittelstababschnittes 3a ist auch an den beiden freien Enden 7 des Mittelstababschnitts 3a jeweils ein Radialabstützungselement 6 vorgesehen, das in einem Ausschnitt C angedeutet und in Figur 2a im Detail wiedergegeben ist.

Suitable examples of the mutual fixing of the center rod section 3a on the one hand and anchoring rod sections 3b on the other hand are the Figures 2 and 3 to be discussed in more detail below:

• FIG. 2 shows an alternative design of a device 11 for thermal insulation, wherein the same components as in FIG. 1 are provided with the same reference numerals. As already shown in FIG. 1 at the right-hand free end 7 of the middle rod section 3 a, a radial support element 6 is also provided at the two free ends 7 of the middle rod section 3 a, which is indicated in a section C and in FIG FIG. 2a is reproduced in detail.

The radial support member 6 consists of a cylindrical ring whose inner diameter is only slightly larger than the outer diameter of the central rod portion 3a so as to abut flat against the outside of the middle rod portion 3a. The detailed representation in FIG. 2a can be seen due to the schematic broken view of the structure of the central rod portion 3a: This consists of glass fiber reinforced plastic with glass fibers 3f, which are oriented for receiving and transmitting the tensile forces, especially in the axial direction. Engraves now the anchoring rod section 3b via a in FIG. 2 not shown, but off FIG. 4 The inner fibers 3f extending in the axial direction do not oppose any loads in the radial direction too much, especially since in the region of the free end 7 of the central rod portion 3a, these fibers tend to dodge in the radial direction , To prevent this is the radial support member 6 is provided, which surrounds the free end 7 of the central rod portion 3a and prevents a radial deflection of the fibers 3f.

Thus, only the radial support member 6 provides a resilient and permanently effective connection of the central rod portion with the anchoring rod portion.

The essential aspects of the invention are also out FIG. 3 recognizable, which shows a further alternative design of a device 21 for thermal insulation, in turn, the same components as in the FIGS. 1 and 2 are provided with the same reference numerals. In FIG. 3 It can be seen that the central portion 3a in the region of its radial outer side 3u has a radial support region 16, which serves to prevent a radial expansion of the central portion 3b in the radial support region 16.

In FIG. 3 is a section D indicated that in FIG. 3a is reproduced in detail. This shows the connection of the anchoring portion 3b to the central portion 3a and in particular the Radialabstützungsbereich 16. While the middle rod portion for receiving tensile forces substantially fibers 3fl, which are oriented in the axial direction, the Radialabstützungsbereich 16 consists of circumferentially of the central portion 3a extending fibers 3fu , These fibers 3fu have been disposed in the region which is to form the radial support portion 16 in addition to the axially arranged fibers 3fl in the production of the center portion 3a.

For connecting the anchoring rod section 3b to the middle rod section 3a, a - in FIG. 3 not shown, but off FIG. 4 Evident - provided inner anchoring element 9, which is on the one hand fixed to the anchoring portion 3b and on the other hand engages in a radial inner region of the central portion 3a.

In the same axial portion as the inner anchoring element 9, the radial support portion 16 is provided with the fibers 3fu extending in the circumferential direction of the central portion 3a.

The radial support portion 16 has the same or at least similar outer diameter as the remaining portion of the central portion 3a. For this purpose, for example, in the production of the first radially inner region is completed with the longitudinally extending fibers 3fl and then completed the radially outer region, 16 fibers 3fu are wound in the circumferential direction in the radial support region. Any disturbing outer diameter differences between the radial support region 16 and the remaining region of the middle section 3a can optionally be filled with matrix material.

Suitable examples of the mutual definition of central section and anchoring section is the FIGS. 4a-4f to be discussed in more detail below, in turn, the same components as in the FIGS. 1 to 3 are provided with the same reference numerals. In the FIGS. 4a-4f shows in each case how different embodiments of an inner anchoring element 9 engages in a radial inner region, namely a cylindrical bore 3c of the central rod portion 3a.

FIG. 4a shows the insertion and fixing of the inner anchoring element 9 in the central rod portion 3a by a press connection and / or by the additional use of an adhesive to actually create a stable connection, which is suitable for the transmission of tensile forces. The inner anchoring member 9 extends along an inner anchoring portion 3v in the radially inner portion of the middle rod portion 3a. Its axial length is in FIG. 4a indicated by the reference L ₅ . In FIG. 4a also has the radial support portion 16 has an axial length corresponding to the dimension L ₅ , wherein the radial support portion 16 in the FIGS. 4a-4f is indicated only schematically by a hidden boundary line extending in the radial direction. Consequently, the inner anchoring region of the radial supporting portion 16 overlap 3v on the one hand and on the other hand along the entire axial length L. ₅

In the embodiment according to FIG. 4b the inner anchoring element 9 is not - as in FIG. 4a - From a part of the anchoring rod portion 3b, but is frontally welded to the anchoring rod portion 3b. The inner anchoring element 9 can, for example, in the manufacture of the Middle bar section directly laminated and welded at a later date to the anchoring rod section 3b. Likewise, it is of course also possible to introduce a cylindrical bore 3c in the middle rod portion 3a and the inner anchoring element 9 there - before or after the connection to the anchoring rod section 3b - set by, for example, gluing.

In Figure 4c is the inner anchoring element 9 of the anchoring portion 3b provided on its outer side with a profiling that allows adhesive, mortar or similar fasteners find more space and form-fitting with the profiling to improve or ensure the mutual connection.

The same profiling of the outside of the inner anchoring element 9 is according to the embodiment FIG. 4d intended. The main difference compared to the embodiment according to Figure 4c is now that the center rod portion 3a 'is not made of a solid material, in which a cylindrical bore 3c is introduced, but from a tube material with a cylindrical through hole 3c'.

In Figure 4e is the inner anchoring element 9 of the anchoring portion 3b provided with an external thread and immersed in the cylindrical opening 3c of the central portion 3a, which opening 3c in turn has an internal thread, thus enabling the screwing of anchoring portion 3b and central portion 3a.

FIG. 4f shows substantially a same embodiment, but with the difference that the inner anchoring element 9 is not integrally formed on the anchoring rod portion, but it is frontally welded to the anchoring rod portion 3b.

How to get out FIG. 1 can see the center portion 3a extends with its plastic material far beyond the insulator and thus makes it possible to be connected to the reinforcing sections consisting of reinforcing steel 3b, to the central portion 3a in such a region 3n, the not yet at risk of corrosion. As a result, significant advantages can be achieved, namely to be able to use the particularly advantageous plastic material of the middle section in the region of the insulating body, which is distinguished above all by lower costs compared to stainless steel and a particularly poor thermal conductivity. And also in the area outside of the insulator, finally, in the area of the components, the anchoring sections consist of reinforcing steel, which has similar Temperaturdehnzahlen as the surrounding concrete component and thus can enter into an optimal connection with the concrete, through which the tensile force from the concrete in the Zugbewehrungselement and vice versa can be transmitted, without causing the otherwise occurring destructions due to excessive relative movements.

In summary, the present invention offers the advantage of providing a thermal insulation component which has tensile reinforcement elements in the form of multi-part composite elements. As a result, different materials can be used exactly according to their properties and advantages, which was previously not possible in the prior art and above all provides the inventive design of fixing the anchoring rod sections at the middle rod portion by means of a Radialabstützungselements and / or Radialabstützungsbereichs that anchoring portion and central portion can be fixed to each other in a simple but reliable way.

Bezuaszeichenliste

• 1 - component for thermal insulation
• 2 - Insulating body
• 3 - tension bars
• 3a - middle bar section
• 3b - anchoring bar sections
• 3f - fibers
• 3fl - axially oriented fibers
• 3fu - circumferentially oriented fibers
• 3u - radial outside of the middle bar section
• 3v - interior anchoring area
• 4 - shear force rods
• 5 - Printing elements
• 6 - radial support element
• 7 - free end of the middle bar section
• 8 - front side of the middle rod portion at the free end. 7
• 9 - Interior anchoring element
• 11 - component for thermal insulation
• 16 - radial support area
• 21 - Component for thermal insulation
• A - concrete component
• B - concrete component
• C - neckline detail off Fig. 2
• D - neckline detail Fig. 3
• d _M - diameter of the middle bar section
• dv - diameter of the anchor rod sections
• L ₁ - axial distance of the radial support element from the insulating body
• L ₂ - length of the radial support area in the axial direction
• L ₃ - measure by which the anchoring rod section extends from the radial support element into the component A or B, respectively
• L ₄ - axial length of the annular radial support element
• L ₅ - a measure by which the inner anchoring element extends into the radially inner region of the central rod section _{3 a}

Claims (21)

Component for thermal insulation between two components, in particular between a building (A) and a cantilevered outer part (B), consisting of an insulating body (2) to be arranged between the two components and of reinforcing elements in the form of at least rod-shaped tensile reinforcement elements (3) Condition of the component (10) substantially horizontally and transversely to the substantially horizontal longitudinal extent of the insulating body passing therethrough and in each case protrude in the horizontal direction relative to the insulating body and in this case can be connected to one of the two preferably made of concrete components, wherein the Zugbewehrungselemente (3) consist at least partially of fiber-reinforced plastic material,
characterized,
in that the tensile reinforcement elements (3) are formed as multipart composite elements in that they have at least in the region of the insulating body (2) a central rod section (3a) of fiber-reinforced plastic material and in a region outside the insulating body (2) a separate anchoring rod section (3b) with at least partially deviating from the median rod portion (3a) geometric and / or material properties,
that the anchor rod portion (3b) and the central rod portion are substantially mutually in alignment and at least determined indirectly to each other that the anchor rod portion (3b) for fixing on the central rod section (3a) having an inner anchor member (9) cooperates, which (in a radial inner region of the central rod portion 3a) engages, and that the central rod portion (3a) on its radial outer side an annular radial support member (6). A thermal insulation component according to claim 1,
characterized,
in that the inner anchoring element (9) extends in the radial inner region of the middle rod section (3a) in the axial direction and that on the radially outer side of the central rod portion (3a) arranged annular radial support member (6) is at least partially disposed in the same axial portion of the central rod portion (3a). Component for thermal insulation according to at least Claim 1,
characterized,
in that the inner anchoring element (9) and / or the radial support element (6) extend to the free end (7) of the central rod section (3a) at which the middle rod section (3a) is fixed to the anchoring rod section (3b). Component for thermal insulation according to at least Claim 1,
characterized,
that the annular radial support element has a radially inwardly projecting stop, and that the stop at least indirectly acts on the end face of the central rod portion located at the free end of the central rod portion. Component for thermal insulation according to at least Claim 1,
characterized,
in that the annular radial support element (6) consists of metal and in particular stainless steel. Component for thermal insulation between two components, in particular between a building (A) and a cantilevered outer part (B), consisting of an insulating body (2) to be arranged between the two components and of reinforcing elements in the form of at least rod-shaped tensile reinforcement elements (3) Condition of the component (10) substantially horizontally and transversely to the substantially horizontal longitudinal extent of the insulating body passing therethrough and in each case protrude in the horizontal direction relative to the insulating body and in this case can be connected to one of the two preferably made of concrete components, wherein the Zugbewehrungselemente (3) consist at least partially of fiber-reinforced plastic material,
characterized,
in that the tensile reinforcement elements (3) are formed as multipart composite elements in that they have at least in the region of the insulating body (2) a central rod section (3a) of fiber-reinforced plastic material and in a region outside the insulating body (2) a separate anchoring rod section (3b) with at least partially deviating from the median rod portion (3a) geometric and / or material properties,
in that the anchoring rod portion (3b) and the middle rod portion (3a) are arranged substantially flush with each other and at least indirectly fixed to each other, that the anchoring rod portion (3b) for fixing to the central rod portion (3a) cooperates with an inner anchoring element (9), which in a radially inner region 3v), the medial rod portion having a radial support portion (16) with fibers (3f) extending at least partially in the circumferential direction of the middle rod portion (3a), and inner anchoring portion (3v) and radial support portion (16) overlap at least partially radially. A thermal insulation component according to claim 6,
characterized,
in that the inner anchoring region (3v) and the radial support region (16) are arranged at least partially in the same axial section of the middle rod section. A thermal insulation component according to at least one of claims 6 to 7,
characterized,
in that the inner anchoring area (3v) and / or the radial support area (16) extend to the free end (7) of the middle bar section (3a), at which the middle bar section (3a) is fixed to the anchoring bar section (3b). A thermal insulation component according to at least one of claims 6 to 8,
characterized,
in that the radial support region (16) is arranged in the radially outer region (3u) of the middle rod section (3a). A thermal insulation component according to at least one of claims 6 to 9,
characterized,
in that the fibers (3fu) extending in the radial support region (16) at least partially in the circumferential direction of the central rod section (3a) are glass fibers. Thermal insulation component according to at least claim 1 or claim 6,
characterized,
that the central rod section (3a) at its two free ends (7) having an anchor rod portion (3b). Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the middle rod section (3a) is designed to be substantially smooth-walled on its radial outer side, at least in the region between the insulating body (2) and its free end (7). Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the radial support element (6) and / or the radial support region (16) is arranged only in the axial section of the middle rod section (3a) projecting relative to the insulating body (2). Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the rod-shaped middle rod section (3a) consists of a solid and / or tubular material and / or that the rod-shaped middle rod section (3a) consists of glass fiber-reinforced plastic material. Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the anchoring rod section (3b) is made of steel, in particular reinforcing steel and / or of fiber-reinforced, in particular glass-fiber-reinforced plastic material. Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the inner anchoring element (9) is fixed in the middle rod section (3a) in a form-locking, non-positive and / or material-locking manner and in particular via an adhesive bond and / or screw connection and / or that the inner anchoring element (9) is molded into the middle rod section (3a) and in particular laminated is. Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the inner anchoring element (9) is fixed in a positive, frictionally and / or firmly bonded manner and in particular via a welded connection to the anchoring rod section (3b) and / or that the inner anchoring element (9) is integrally formed on the anchoring rod section (3b) and / or part of the anchoring rod section (3b) Anchoring rod portion (3b) is. Thermal insulation component according to at least claim 1 or claim 6,
characterized,
in that the inner anchoring element (9) engages over an axial length (L ₅ ) in the radial inner region of the central rod section which is at least 4 times and in particular at least 5 times the diameter (d _M ) of the middle rod section (3a). Component for thermal insulation according to at least Claim 1,
characterized,
in that the annular radial support element has a length (L ₄ ) in the axial direction that is at least 1.5 times and in particular at least twice as large as the diameter (d _M ) of the middle rod section (3a). Component for thermal insulation according to at least claim 6,
characterized,
in that the radial support region (16) with fibers (3fu) extending at least partially in the circumferential direction of the central rod section (3a) has a length (L ₂ ) in the horizontal direction which is at least 1.5 times and in particular at least 2 times and at most 15 times. times and in particular at most 12 times as large as the diameter (dv) of the anchoring section (3b). Thermal insulation component according to at least claim 1 or claim 6,
characterized,
that the element for heat insulation (1) in addition to the Zugbewehrungselementen (3) pressure elements (5) and / or transverse force elements (4).

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