Element for thermal insulation

Abstract

An element for thermal insulation between two building parts, particularly between a building (A) and a protruding exterior part (B), comprising an insulating body (2) to be arranged between the two building parts and reinforcement elements in the form of at least tensile elements (3), extending in an installed state of the element (10) essentially horizontally and perpendicular to an essentially horizontal extension of the insulating body through said body, and respectively projecting in the horizontal direction from the insulating body and here allowing a connection to one of the two building parts preferably made from concrete. Here the tensile reinforcement elements (3) are formed as multi-part composite elements such that at least in the proximity of the insulating body (2) they have a central rod section (3a) made from fiber-reinforced synthetic material and have a separate anchoring rod section (3b) in an area outside the insulating body (2) with geometric and/or material characteristics at least partially deviating from the central rod section (3a), with the anchoring rod section (3b) and the central rod section being arranged at least essentially aligned to each other and at least indirectly fixed to each other, and with the anchoring rod section (3b) cooperating with an interior anchoring element for fixing at the central rod section (3a), which interior anchoring element engages a radially interior area of the central rod section. The central rod section (3a) comprises on its radial exterior an annular radial support element and/or a radial support area (3ab) with fibers (3f) extending at least partially in the circumferential direction of the central rod section (3a), with the interior anchoring section (3v) and the radial support area (3ab) at least partially overlapping each other.

Claims

1. An element for thermal insulation between two building parts, comprising an insulating body (2) to be allocated between the two building parts and reinforcement elements including at least rod-shaped tensile reinforcement elements (3), which in an installed state of the element (10) extend essentially horizontally and extend perpendicular to an essentially horizontal extension of the insulating body through said body, and each said rod-shaped tensile reinforcement element projects in a horizontal direction from the insulating body and are here connectable to one of the two building parts, the tensile reinforcement elements (3) being made at least partially from a fiber-reinforced synthetic material and are each embodied as multi-part composite elements that at least in proximity to the insulating body (2) comprise a central rod section (3a) made from a fiber reinforced synthetic material and in an area outside the insulating body (2) include a separate anchoring rod section (3b) with at least one of geometric or material characteristics at least partially deviating from the central rod section (3a), the anchoring rod section (3b) and the central rod section are arranged coaxially to each other and are fixed to each other at least indirectly, the anchoring rod section (3b) cooperates with an interior anchoring element (9) for fixation to the central rod section (3a) and engages a radial interior area of the central rod section (3a), a separate annular radial support element (6) located at a radial exterior of the central rod section (3a) formed as a separate component from the central rod section (3a) and only contacting the central rod section (3a) with an inner perimeter of the annular radial support element (6), the central rod section (3a) is formed at least in an area between the insulating body (2) and a free end (7) thereof with an essentially smooth, constant outside diameter on a radial exterior, the radial support element (6) is arranged only in an axial area of the central rod section (3a) projecting from the insulating body (2), and the radial support element (6) is arranged spaced apart from the insulating body.

2. The element for thermal insulation according to claim 1, wherein the interior anchoring element (9) extends in the radial interior area of the central rod section (3a) in an axial direction and the annular radial support element (6) arranged on the radial exterior of the central rod section (3a) is arranged at least partially in a same axial area of the central rod section (3a).

3. The element for thermal insulation according to claim 1, wherein at least one of the interior anchoring element (9) or the radial support element (6) extend to a free end (7) of the central rod section (3a) at which the central rod section (3a) is fastened at the anchoring rod section (3b).

4. The element for thermal insulation according to claim 1, wherein the annular radial support element comprises a stop projecting inwardly in a radial direction and the stop at least indirectly impinges a face of the central rod section located at a free end of the central rod section.

5. The element for thermal insulation according to claim 1, wherein the annular radial support element (6) is made from metal.

6. An element for thermal insulation between two building parts, comprising an insulating body (2) to be arranged between the two building parts, reinforcement elements including at least rod-shaped tensile reinforcement elements (3), which in an installed state of the building element (10) project horizontally and perpendicularly to an essentially horizontal, longitudinal extension of the insulating body through said body, and each said rod-shaped tensile reinforcement element projects in the horizontal direction from the insulating body, and are here connectable to one of the two building parts, the tensile reinforcement elements (3) at least partially being made from a fiber-reinforced synthetic material and are each embodied as multi-part composite elements including at least in proximity to the insulating body (2) a central rod section (3a) made from fiber-reinforced synthetic material and in an area outside the insulating body (2) a separate anchoring rod section (3b) with at least one of geometric or material features at least partially deviating from the central rod section (3a), the anchoring rod section (3b) and the central rod section (3a) are arranged aligned towards each other, and are fixable to each other at least indirectly, the anchoring rod section (3b) cooperates with an interior anchoring element (9) for fixation to the central rod section (3a), said interior anchoring element engages a radial interior area of the central rod section and extends here in an axial direction over an interior anchoring section (3v), the central rod section further comprises a radial support area (16) with fibers (3f) extending directly on and at least partially in a circumferential direction around the central rod section (3a), the interior anchoring section (3v) and the radial support area (16) overlap radially, at least partially, the central rod section (3a) is formed at least in an area between the insulating body (2) and a free end (7) thereof with an essentially smooth, constant outside diameter on a radial exterior, the radial support area (16) is arranged only in an axial area of the central rod section (3a) projecting from the insulating body (2), and the radial support area (16) is arranged spaced apart from the insulating body.

7. The element for thermal insulation according to claim 6, wherein the interior anchoring area (3v) and the radial support area (16) are arranged at least partially in a same axial section of the central rod section.

8. The element for thermal insulation according to claim 6, wherein at least one of the interior anchoring area (3v) or the radial support area (16) extend to a free end (7) of the central rod section (3a) at which the central rod section (3a) is fixed to the anchoring rod section (3b).

9. The element for thermal insulation according to claim 6, wherein the radial support area (16) is arranged in a radial exterior area (3u) of the central rod section (3a).

10. The element for thermal insulation according to claim 6, wherein the fibers (3fu) extending at least partially in a circumferential direction in the central rod section (3a) are fiberglass.

11. The element for thermal insulation according to claim 6, wherein two of the anchoring rod sections (3b) are provided, with one being located at each of the free ends (7) of the central rod section (3a).

12. The element for thermal insulation according to claim 6, wherein at least one of (a) the rod-shaped central rod section (3a) comprises at least one of a solid or tubular material, or (b) the rod-shaped central rod section (3a) is made from a fiberglass reinforced synthetic material.

13. The element for thermal insulation according to claim 6, wherein the anchoring rod section (3b) is made from at least one of steel or fiber reinforced synthetic material.

14. The element for thermal insulation according to claim 6, wherein the interior anchoring element (9) in the central rod section (3a) is fixed in at least one of a form-fitting, force-fitting, or material-to-material fashion, via at least one of an adhesive connection, a threaded connection, or formed connection by the interior anchoring element (9) being formed in the central rod section (3a).

15. The element for thermal insulation according to claim 6, wherein the interior anchoring element (9) is fixed in at least one of a form-fitting, force-fitting, or material-to-material fashion, via at least one of (a) a welding connection to the anchoring rod section (3b), the interior anchoring element (9) being formed in one piece at the anchoring rod section (3b) or representing a part of the anchoring rod section (3b).

16. The element for thermal insulation according to claim 6, wherein the interior anchoring element (9) engages over an axial length (L.sub.5) of a radial interior area of the central rod section, which is at least 4-times a size of a diameter (d.sub.M) of the central rod section (3a).

17. The element for thermal insulation according to claim 1, wherein the annular radial support element has a length (L.sub.4) in an axial direction that is at least 1.5 times a size of a diameter (d.sub.M) of the central rod section (3a).

18. The element for thermal insulation according to claim 6, wherein the radial support area (16) comprises fibers (efu) extending at least partially in the circumferential direction of the central rod section (3a) having a length (L.sub.2) in the horizontal direction that is at least 1.5 times and maximally 15-times a size of the diameter (d.sub.V) of the anchoring section (3b).

19. Then element for thermal insulation according to claim 6, wherein the element for thermal insulation (1), in addition to the tensile reinforcement elements (3), has at least one of compression elements (5) or lateral force elements (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Additional features and advantages of the present invention are discernible from the following description of exemplary embodiments based on drawings; shown here are:

(2) FIG. 1 an element for thermal insulation according to the invention in a schematic and partially cross-sectioned side view;

(3) FIGS. 2 and 2A an alternative element for thermal insulation according to the invention with a first embodiment for the mutual fixation of a central rod section and an anchoring rod section according to a first solution according to the invention;

(4) FIGS. 3 and 3A another alternative element for thermal insulation according to the invention with a second embodiment for the mutual fixation of a central rod section and an anchoring rod section according to a second solution according to the invention; and

(5) FIGS. 4A-4F additional different embodiments for the mutual fixation of the central rod section and the anchoring rod section.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) FIG. 1 shows an element for thermal insulation 1 with a multi-part cuboid-shaped insulating body 2, which is provided for an arrangement in a building joint remaining between two concrete building parts (which are not shown here, but with their position being indicated by the reference characters A, B) for the purpose to distance these to concrete building parts A, B from each other in a thermally insulating fashion. The insulating body 2 is assembled from several parts, in order to allow the installation of reinforcement elements in the form of tensile rods 3, in the form of lateral force rods 4, and in the form of compression elements 5.

(7) The arrangement of the reinforcement elements occurs in a manner known from prior art and common, namely by arranging the tensile reinforcement elements 3 in the upper area, the so-called tensile zone of the insulating body 2, which in the installed state extend in the horizontal direction and serve for the transfer of tensile forces between the two building parts A, B connected to the element for thermal insulation and for this purpose are anchored in these building parts. In the lower section, the so-called pressure zone of the insulating body 2, the pressure elements 5 are arranged, namely also in the horizontal direction of extension, with them however not or hardly projecting from the insulating body 2. Finally, lateral force rods 4 are provided, which extend in the area inside the insulating body 2 in an inclined fashion in reference to the horizontal and extend from the reinforcement elements of the element for thermal insulation diagonally downwards, matching the stress to be compensated, from the tensile zone on one side of the insulating body to the pressure zone on the other size of the insulating body, in order to here extend vertically in the direction of the tensile zones angled upwards and then, after another angle, parallel to the tensile reinforcement elements.

(8) The tensile reinforcement elements 3 are essential for the present invention, which are embodied as multi-part composite elements with a rod-shaped central rod section 3a made from a fiber reinforced synthetic material and rod-shaped anchoring rod sections 3b made from rebar. The central rod section 3a extends in the area of the insulating body 2 in the horizontal direction and projects slightly in the horizontal direction at both sides of the insulating body respectively with its free end 7, with the section respectively projecting here being arranged in the installed state in the proximity of the adjacent building parts A, B. Both anchoring rod sections 3b are arranged aligned to the central rod section 3a and respectively fastened at one of the two free ends 7 of the central rod section 3a.

(9) The central rod section 3a comprises at its radial exterior, in the proximity of the free ends 7a on the one side, namely at the free end 7 at the right side in FIG. 1, an annular radial support element 6, which contacts in a planar fashion the exterior jacket of the central rod section and is fastened in this position by way of adhesion. This radial support element 6 is discussed in greater detail in the context with the embodiment according to FIG. 2. And at the other side, namely at the free end 7 of the central rod section 3a left in FIG. 1, a radial support section 16 is shown, which is discussed in greater detail in the context with the embodiment according to FIG. 3.

(10) The axial size by which the central rod section 3a projects beyond the insulating body 2 amounts to L.sub.1+L.sub.2, with the length L.sub.1 being equivalent to the axial distance of the radial support element 6 from the insulating body 2, the length L.sub.2 equivalent to the length of the radial support area 16 in the axial direction, as well as the length L.sub.4 equivalent to the length of the radial support element 6 in the axial direction, with the lengths L.sub.2 and L.sub.4 being identical in size in FIG. 1.

(11) The length L.sub.3 finally provides the size by which the anchoring rod section 3b, starting from the radial support element 6 and/or the facial side 8 of the central rod section 3a, extends into the building part A. FIG. 1 shows here not the full length of the anchoring rod section 3a and thus the size of the length L.sub.3 in FIG. 1 is not equivalent to the overall length of the anchoring rod section 3b, either.

(12) The central rod section 3a has a diameter d.sub.M, which is greater than the diameter d.sub.V of the anchoring rod section 3b.

(13) Suitable examples for the mutual fixation of the central rod section 3a on the one side and anchoring rod sections 3b on the other side are discernible from FIGS. 2 and 3, which shall be explained in greater detail in the following:

(14) FIG. 2 shows an alternative design of a building element 11 for thermal insulation, with here parts identical to those in FIG. 1 being marked with the same reference characters. Similar to the right end 7 of the central rod section 3a in FIG. 1, the two free ends 7 of the central rod section 3a are also provided respectively with a radial support element 6, indicated in a section C and shown in detail in FIG. 2A.

(15) The radial support element 6 comprises a cylindrical ring, with its interior diameter being only slightly greater than the exterior diameter of the central rod section 3a in order to this way allow it contacting the exterior of the central rod section 3a in a planar fashion. The detail illustrated in FIG. 2A discloses in a schematic, sectional illustration the design of the central rod section 3a: It comprises fiberglass-reinforced synthetic materials with glass fibers 3f, which are aligned primarily in the axial direction for compensating and transferring tensile forces. If now the anchoring rod section 3b, not shown in FIG. 2 but discernible from FIG. 4, engages via the interior anchoring element the radial interior area of the central rod section 3a, here the fibers 3f extending in the axial direction cannot provide any strong resistance to potential stress in the radial direction, primarily since these fibers, in the proximity of the free end 7 of the central rod section 3a, tend to deflect in the radial direction. In order to prevent this effect, the radial support element 6 is provided, which encompasses the free end 7 of the central rod section 3a and prevents any radial deflection of the fibers 3f.

(16) Therefore, only the radial support element 6 ensures a resilient and lastingly effective connection of the central rod section to the anchoring rod section.

(17) The aspects essential for the invention are also discernible from FIG. 3, which displays another alternative version of an element 21 for thermal insulation, with once more identical components being provided with the same reference characters as in FIGS. 1 and 2. FIG. 3 discloses that the central section 3a comprises a radial support section 16 in the area of its radial exterior 3u, which serves to prevent any radial widening of the central section 3b in the radial support area 16.

(18) FIG. 3 shows a detail D, illustrated in detail in FIG. 3A. It shows the connection of the anchoring section 3b to the central section 3a and particularly the radial support area 16. While the central rod section essentially comprises fibers 3fl, which are oriented in the axial direction for compensating tensile forces, the radial support area 16 comprises fibers 3fu extending in the circumferential direction of the central section 3a. These fibers 3fu were arranged during the production of the central section 3a, in addition to the fibers 3fl arranged in the axial direction, in the area, which shall form the radial support area 16.

(19) Adjacent to the anchoring rod section 3b at the central rod section 3a, not shown in FIG. 3 but discernible from FIG. 4, an interior anchoring element 9 is provided, which on the one side is fixed at the anchoring section 3b and on the other side engages a radial interior area of the central rod section 3a.

(20) In the same axial section as the interior anchoring element 9, the radial support area 16 is provided with the fibers 3fu extending in the circumferential direction of the central section 3a.

(21) The radial support area 16 comprises the same and/or an at least similar exterior diameter as the remaining area of the central section 3a. For this purpose, for example during the production initially the radially interior area is produced with the fibers 3fl extending in the longitudinal direction, and subsequently the radially exterior area is added, with fibers 3fu being wound in the circumferential direction in the radial support area 16. Potentially disturbing differences in the exterior diameter between the radial support area 16 and the remaining area of the central section 3a may perhaps be filled with matrix material.

(22) Suitable examples for the mutual fastening of the central section and the anchoring section are discernible from FIGS. 4A-4F, which shall be discussed in greater detail in the following, with once more identical components being marked with the same reference characters as in FIGS. 1 to 3. FIGS. 4A-4F respectively show how different embodiments of an internal anchoring element 9 engage a radial internal area, namely a cylindrical bore 3c of the central rod section 3a.

(23) FIG. 4A shows the insertion and fixation of the interior anchoring element 9 in the central rod section 3a by a press connection and/or by the additional use of adhesives in order to actually generate a stable connection, which is suitable to transfer tensile forces. The internal anchoring element 9 extends along an interior anchoring area 3v in the radial interior area of the central rod section 3a. Its axial length is indicated in FIG. 4A with the reference character L.sub.5. In FIG. 4A the radial support area 16 also shows an axial length, which is equivalent to the size L.sub.5, with the radial support area 16 in FIGS. 4A-4F being only indicated schematically by the covered boundary line, extending in the radial direction. Consequently the interior anchoring area 3v on the one side and the radial support area 16 on the other side overlap each other along the entire axial length L.sub.5.

(24) Unlike FIG. 4A, in the embodiment according to FIG. 4B the interior anchoring element 9 represents not a part of the anchoring rod section 3b but is welded at the facial side to the anchoring rod section 3b. The interior anchoring element 9 can for example be directly laminated therein during the production of the central rod section and only be welded to the anchoring rod section 3b at a later point of time. Of course it is also possible to insert a cylindrical bore hole 3c into the central rod section 3a and to fix the interior anchoring element 9 here, before or after the connection to the anchoring rod section 3b, using adhesives, for example.

(25) In FIG. 4C the interior anchoring element 9 of the anchoring section 3b is provided at its exterior with a profiling, which allows that adhesive, mortar, or similar connecting material are provided with more space here to enter into a positive connection with said profiling in order to allow improving and/or ensuring the mutual connection.

(26) The same profiling at the exterior of the interior anchoring element 9 is provided in the embodiment according to FIG. 4D. The essential difference in reference to the embodiment according to FIG. 4C comprises here that the central rod section 3a is not made from a solid material, in which a cylindrical bore 3c is inserted, but from a tubular material with a cylindrical penetrating bore 3c.

(27) In FIG. 4A the interior anchoring element 9 of the anchoring section 3b is provided with an external thread and penetrates the cylindrical opening 3c of the central section 3a, which opening 3c in turn comprises an internal thread and this way allows the threaded connection of the anchoring section 3b and the central section 3a.

(28) FIG. 4F shows essentially the same embodiment, however with the difference that the interior anchoring element 9 is not formed in one piece with the anchoring rod section but is welded at the facial side to the anchoring rod section 3b.

(29) As discernible from FIG. 1, the central section 3a extends with its synthetic material far beyond the insulating body and this way allows the anchoring sections 3b made from rebar to be welded to the central section 3a in such an area 3n, which is not at risk for corrosion. This way, essential advantages can be achieved, namely in the area of the insulating body here the particularly advantageous synthetic material of the central section can be used, which is characterized primarily in reference to stainless steel in lower costs and a particularly poor thermal conductivity. And additionally, in the area outside the insulating body, finally in the area of the building parts the anchoring sections may be made from rebar, which has similar temperature expansion coefficients as the construction concrete surrounding it, and thus can generate an optimal connection to the concrete, by which tensile force can be transferred from the concrete into the tensile reinforcement element and vice versa without any otherwise developing destruction occurring caused by excessive relative movements.

(30) In summary, the present invention provides the advantage to provide an element for thermal insulation which comprises tensile reinforcement elements in the form of multi-part composite elements. This way, the various materials can be used precisely according to their characteristics and advantages, which was not possible in this way in prior art and the embodiment according to the invention ensures for the fastening of the anchoring rod sections at the central rod section via a radial support element and/or a radial support section such that the anchoring sections and the central section can be fixed to each other in a simple but resilient fashion.

LIST OF REFERENCE CHARACTERS

(31) 1element for thermal insulation

(32) 2insulating body

(33) 3tensile rods

(34) 3acentral rod section

(35) 3banchoring rod sections

(36) 3ffibers

(37) 3flfibers oriented in the axial direction

(38) 3fufibers oriented in the circumferential direction

(39) 3uradial exterior of the central rod section

(40) 3Vinterior anchoring area

(41) 4lateral force rods

(42) 5pressure elements

(43) 6radial support element

(44) 7free end of the central rod section

(45) 8facial side of the central rod section at the free end 7

(46) 9interior anchoring element

(47) 11element for thermal insulation

(48) 16radial support area

(49) 21element for thermal insulation

(50) Aconcrete building part

(51) Bconcrete building part

(52) Cdetail of FIG. 2

(53) Ddetail of FIG. 3

(54) d.sub.Mdiameter of the central rod section

(55) d.sub.Vdiameter of the anchoring rod section

(56) L.sub.1axial distance of the radial support element from the insulating body

(57) L.sub.2length of the radial support area in the axial direction

(58) L.sub.3size the anchoring rod section extends from the radial support element into the building part A and/or B

(59) L.sub.4axial length of the annular radial support element

(60) L.sub.5size the interior anchoring element extends into the radial interior area of the central rod section 3a.