US20120060435A1

US20120060435A1 - Mounting rail

Info

Publication number: US20120060435A1
Application number: US13/068,649
Authority: US
Inventors: Markus Heudorfer; Wolfgang Schulz-Hanke; Ulrich Birnbaum; Denis Novokshanov; Holger Basche
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2010-05-18
Filing date: 2011-05-17
Publication date: 2012-03-15
Also published as: EP2388381A2; DE102010029046A1; EP2388381A3

Abstract

A mounting rail (1) for embedding in a curable construction material (3), e.g. concrete (4), having a support profile (2), such that the support profile (2) has a connection on the outer side thereof and via an embedding region (5) thereof to the curable construction material (3). It should be possible to easily remove the construction material (3) from the mounting rail (1) outside of the embedding region (5) of the mounting rail (1) following hardening of the construction material (3). The support profile (2) having a non-stick coating (7) and/or a non-stick surface outside of the embedding region (5), at least over a part thereof.

Description

This claims the benefit of German Patent Application DE 10 2010 029 046.7, filed May 18, 2010 and hereby incorporated by reference herein.
The present invention relates to a mounting rail, to a method for embedding a mounting rail, and to a structure.

BACKGROUND

In structural engineering, anchor rails or mounting rails are poured or embedded into concrete, such that only an upper side and/or an outer region of a support profile of the mounting rail is freely accessible. The mounting rail conducts forces, which are applied to the same by means of contact and/or a connection, to an embedding region with the surrounding concrete and into said concrete. The mounting rail in this case has, in general, rearward anchors. For this case in general, forces which engage with the mounting rail are substantially conducted into the concrete by the support profile and the anchors.
The anchor rails must be inserted into a formwork prior to the pouring of the concrete and/or to the embedding of the rails into the concrete, the same being the curable material. In order to prevent the concrete from penetrating the outer region of the support profile during placement and the subsequent hardening of the concrete, an internal space of the mounting rail is temporarily filled with a filler material, or a slit and/or groove on an internal space is covered. The mounting rail is embedded in the concrete on the outer embedding region thereof, wherein outside of the embedding region, no concrete should come into contact with the mounting rail on the outer region thereof. Particularly, no concrete and/or no laitance should come into contact with the region of an internal space which is enclosed by a support profile, because ultimately as a result, means for the attachment of structural attachments, for example a hook bolt, can then no longer be appropriately inserted into the internal space. However, the filler material frequently does not fit perfectly and/or the shape thereof is altered by external influences, such that cavities nevertheless form between the rail and/or the support profile of the mounting rail and the filler material, and in this way, liquid laitance can penetrate into these cavities and subsequently harden. Upon hardening, the laitance is bonded to the support profile and cannot be removed without great difficulty and the use of auxiliary means. Once the filler material is removed, the hardened laitance consequently remains as a residue on the support profile and thereby negatively influences the function of the mounting rail. This is because the hook bolt, for example, can no longer be inserted in the rail with a perfect fit, or can only be inserted with very high effort. The hardened laitance or the hardened mortar can then only be removed from the outer region of the support profile with increased effort, for example by means of hammer strikes. This is associated with additional, cost-intensive and labor-intensive effort. In addition, the same can result in the damage of, for example, an anti-corrosion layer of zinc on the support profile, with the formation of rust as a consequence.
A mounting rail is known from DE 101 25 970 A, the same having two half rails which run in the longitudinal direction and which are connected to each other. The half rails in this case are connected to each other by means of connectors, and the connectors are preferably designed as clamp connectors. The mounting rail is intended to be embedded in concrete in a roof or a wall of a building, and the mounting rail is filled with a filler material for the purpose of preventing concrete from penetrating into the same.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a method for embedding a mounting rail, and providing a structure, wherein a curable construction material, particularly concrete or laitance, can be easily removed from the mounting rail outside of an embedding area of the mounting rail once the concrete has hardened.
The present invention provides a mounting rail for embedding in a curable construction material, e.g. concrete, having a support profile, such that the support profile has a connection to the curable construction material on the outer side thereof via an embedding region, and the support profile has a non-stick coating and/or a non-stick surface outside the embedding region and at least on a part thereof Due to the application of a non-stick coating, or the production of a non-stick surface outside of the embedding region, the hardened construction material can be easily removed again from the support profile following hardening of the laitance or the mortar as the curable construction material on the mounting rail, particularly on the support profile. In this way, damage to the mounting rail can be prevented in an advantageous manner, and the effort required to remove the curable construction material can be reduced. In this way, it is also possible to attach means for the attachment of structural attachments to the mounting rail in a simple manner following hardening of the construction material.
In an additional embodiment, the non-stick coating is formed by a mold release agent.
In a complementary variant, the support profile has the non-stick coating and/or the non-stick surface on at least part of an outer region thereof.
The support profile is particularly provided with the non-stick coating and/or the non-stick surface over the entire surface thereof outside of the embedding region.
In a further embodiment, a filler material, e.g. at least one filler body, is arranged inside an internal space enclosed by the support profile.
Advantageously, the at least one filler body is an elastic foam body.
In an additional embodiment, the filler material is a curable foam, and is inserted by means of insertion and subsequent foaming of the foam material in an internal space of the support profile.
In a complementary embodiment, the filler material has a non-stick coating and/or a non-stick surface on the outer side thereof, and at least over a part thereof, and particularly over the entire surface thereof. In this way, hardened construction material can be easily removed from the filler material in an advantageous manner, and as such, the removal of the filler material from the internal space can be simplified.
The non-stick coating is preferably PTFE and/or wax and/or oil and/or grease and/or silicone, particularly cross-linked silicone polymer.
In one variant, the material of the non-stick coating has a microstructured surface demonstrating the lotus effect, and/or the non-stick coating is a nanocoating.
The non-stick coating of the support profile is advantageously made up of the same material as the support profile, and/or the non-stick surface of the filler material is made up of the same material as the filler material, and the non-stick surface is a microstructured surface demonstrating the lotus effect. The support profile is produced initially with the non-stick surface, such that a non-stick surface is available over a long time on the outer region and/or outside the embedding region. In this way, it is not necessary to re-apply a non-stick coating prior to every embedding of the mounting rail in concrete.
In a further embodiment, the support profile has a substantially C-shaped figure in the cross section thereof, and/or the mounting rail is designed with at least one means for the attachment of at least one structural attachment on the mounting rail, and preferably said means has at least one bolt and/or screw, e.g. a hook bolt, a hammer-head machine screw, a hammer-head bolt, a groove, a slit, or an internal space which is enclosed by the support profile and has an opening as the groove or slit, for the purpose of the attachment of structural attachments.
Particularly, the mounting rail has at least one, and preferably multiple, anchors for embedding in the curable construction material, and preferably the at least one anchor is attached to the support profile.
In a further embodiment, the mounting rail, particularly the support profile, is made at least partially, and preferably entirely, of metal, e.g. iron, steel, or aluminum, and/or of plastic.
A method according to the invention for embedding a mounting rail, particularly a mounting rail described in this patent protection application, in a curable construction material, e.g. concrete or mortar, having the following steps: arrangement of the mounting rail with a support profile at the embedding position; introduction of a curable construction material into a space bounded by a formwork, such that the support profile comes into contact, and preferably direct contract, with the curable construction material via an embedding region thereof; hardening of the construction material, wherein a non-stick coating is applied to the support profile outside of the embedding region of the support profile prior to the introduction of the curable construction material.
In a complementary variant, a filler material, e.g. at least one filler body, is arranged in an internal space enclosed by the support profile prior to the introduction of the curable construction material, and the filler material is coated with a non-stick coating prior to the arrangement thereof in the internal space.
In a further variant, the non-stick coating is PTFE and/or wax and/or oil and/or grease, and/or silicone, particularly cross-linked silicone polymer.
In a further embodiment, the non-stick coating is sprayed, painted, or applied as microcapsules onto the support profile and/or onto the filler material.
In a further embodiment, the curable construction material is mortar or an aggregate, preferably a mineral aggregate, e.g. gravel or sand, with a binder agent, e.g. cement or bitumen.
A structure according to the invention, or components of said structure, e.g. a wall or a roof, made of a curable construction material with a mounting rail embedded in the construction material, wherein the mounting rail is designed as a mounting rail described in the patent protection application, and/or the structure, or the components of said structure, is produced according to a method described in this patent protection application.

BRIEF DESCRIPTION OF THE DRAWINGS

One embodiment of the invention is explained in detail below with reference to the attached illustrations. The included illustrations are:

FIG. 1 a cross section of a mounting rail embedded in the concrete,

FIG. 2 a cross section of a filler body for the mounting rail according to FIG. 1, and

FIG. 3 a side view of the mounting rail according to FIG. 1.

DETAILED DESCRIPTION

In FIGS. 1 and 3, a mounting rail 1 or an anchor rail 1 is illustrated. The mounting rail 1 is a support profile 2 made of metal, particularly steel or aluminum. An anchor 13 is attached to a lower leg of the support profile 2 which is oriented horizontally in FIG. 1. In addition to the horizontally oriented leg of the support profile 2 described above, the support profile 2 also has two vertical legs which are oriented vertically. Two horizontally oriented strip legs 17 are present on the upper end of the vertically oriented legs of the support profile 2. The strip legs 17 of the support profile 2 have an undercut on the underside thereof. The lower legs, oriented substantially horizontally, and each of the two vertical and inclined legs of the support profile 2 are in direct contact with concrete 4 as the curable construction material 3 on the outer side thereof, wherein said curable construction material 3 is, for example, the wall of a structure. As such, these legs provide the embedding region 5 of the support profile 2 on the outer side thereof. Both of the strip legs 17 are not in contact with the concrete 5 on an upper side 18 thereof, i.e. said strip legs 17 form an outer region 6 of the support profile 2. The outer region 6 is also formed by the remaining legs of the support profile 2 over an internal space 12. The support profile 2 encloses the internal space 12. The internal space 12 has an opening 11 in the form of a slit 9 or a groove 10. A hammer-head machine screw or hook bolt can be fixed in the internal space 12 as a means for the attachment of structural attachments, which are not illustrated. In this manner, it is possible for the mounting rail 1 to bear a load. The anchors 13 are likewise embedded in the concrete 4 and function to allow the mounting rail 1 to bear correspondingly large forces and/or loads.
The mounting rail 1 is inserted into a space bounded by a formwork prior to the introduction of the concrete. In this case, filler material 14 is inserted into the internal space 12 as a filler body 15 prior to the introduction of the concrete (FIG. 2). The filler body 15 thereby constitutes an elastic foam body 16, the geometry of which corresponds to the geometry of the internal space 12 in a cross section perpendicular to a longitudinal axis 8 of the mounting rail 1. In this way, the filler body 15 can substantially and entirely fill in the internal space 12, and the filler body 15 ends at the upper side 18 of the strip legs 17 of the support profile 2.
The support profile 2 has a non-stick coating 7 outside of the embedding region 5, i.e. on the outer region 6 thereof. The non-stick coating can be a mold release agent, e.g. oil or PTFE. In addition, the surface of the filler body 15 is also provided with the non-stick coating 7. Very small cavities and/or spaces can be present between the outer region 6 of the support profile 2 and the filler material 15. Laitance or mortar can penetrate into these cavities, the same hardening after the concrete is introduced, and then consequently bind to the support profile 2 and the filler body 15. Due to the application of the non-stick coating 7 onto the support profile 2 and the filler body 15, this hardened laitance can be very easily removed with little mechanical effort from the support profile 2 and from the filler body 15 after the laitance has hardened and the filler body 15 has been subsequently removed from the internal space 12 of the support profile 2. This is necessary so that the hook bolt can be inserted into the opening 11 of the internal space 12. The application of the non-stick coating 7 onto the filler body 15 has the advantage that the laitance can be removed from the filler body 15 with little effort after the laitance has hardened on the filler body 15 (which is a type of concrete preserved with filler material). Consequently, oil is sprayed into the outer region 6 of the support profile 2 as a mold release agent prior to the introduction of the concrete and the insertion of the filler body 15 into the internal space 12 of the support profile 2. Likewise, the mold release agent is also sprayed onto the filler body 15—a foam body 16—prior to the introduction of the concrete. In this way, the bond between the curable construction material 3, particularly laitance, and the support profile 2 as well as the filler body 15, can be reduced in an advantageous manner as described above, such that the residue of the construction material 3 can be easily removed from the support profile 2 and from the filler body 15 following hardening of the construction material 3.
Unlike in the embodiment illustrated in FIGS. 1 and 2, the support profile 2 can be constructed with a non-stick surface on the outer region 6 thereof, instead of having a non-stick coating 7. In a similar manner, the filler body 15 can also have the non-stick surface on the outer side thereof. The non-stick surface in this case provides a microstructured surface demonstrating the lotus effect, and consequently is a nanosurface, for example. Due to the microstructured surface, the bond between the construction material 3 and the support profile 2 on the outer region 6 thereof, as well as on the surface of the filler body 15, is reduced, such that the construction material 3 can be easily removed from the outside region 6 and from the filler body 15 following hardening of the same, in a similar manner as that described in the embodiment above. Due to the long-lasting microstructured surface as the non-stick surface, it becomes no longer necessary to spray the non-stick coating 7 onto the outer region 6 and onto the surface of the filler body 15 prior to every pouring of the concrete 4.
Overall, substantial advantages are associated with mounting rails 1 according to the invention. Due to the non-stick coating 7 on the outer region 6 of the support profile 2 and on the surface of the filler body 15, the bond between the construction material 3, particularly in the form of concrete or mortar, on the support profile 2 and the filler body 15 is reduced, such that as a result, residues of the construction material 3 can be easily removed from the support profile 2 and from the filler body 15 following hardening of the construction material 3. As such, it is possible to easily reproduce the originally present surface and/or shape of the internal space 12 of the support profile 2, such that a hook bolt can be inserted again without any problem into the internal space 12.

Claims

What is claimed is:

1. A mounting rail for embedding into a curable construction material comprising: a support profile having a connection to the curable construction material on an outer side via an embedding region, the support profile having a first surface outside of the embedding region, the first surface having a non-stick coating at least partially covering the first surface and/or being at least partially a non-stick surface.

2. The mounting rail as recited in claim 1 wherein the support profile is entirely covered by the non-stick coating and/or the non-stick surface outside the embedding region.

3. The mounting rail as recited in claim 1 further comprising a filler material arranged inside an internal space enclosed by the support profile.

4. The mounting rail as recited in claim 3 wherein the filler material is a filler body.

5. The mounting rail as recited in claim 3 wherein the filler material has a non-stick coating and/or a non-stick surface covering at least a part thereof.

6. The mounting rail as recited in claim 5 wherein the non-stick coating and/or non-stick surface entirely covers the filler material.

7. The mounting rail as recited in claim 1 wherein the first surface has a non-stick coating made of PTFE and/or wax and/or oil and/or grease and/or silicone.

8. The mounting rail as recited in claim 1 wherein the first surface is a non-stick coating with a microstructured surface demonstrating the lotus effect and/or a nanocoating.

9. The mounting rail as recited in claim 1 the first surface is a non-stick surface of the support profile made of the same material as the support profile and the non-stick surface is a microstructured surface demonstrating the lotus effect.

10. The mounting rail as recited in claim 5 wherein the non-stick surface of the filler material is made of the same material as the filler material, and the non-stick surface of the filler material is a microstructured surface demonstrating the lotus effect.

11. The mounting rail as recited in claim 1 wherein the support profile has a substantially C-shaped cross-section defining an internal space having an opening as a groove or slit for at least one attachment for at least one structural attachment on the mounting rail, the attachment being at least one bolt and/or at least one screw.

12. The mounting rail as recited in claim 1 further comprising at least one anchor for embedding in the curable construction material.

13. The mounting rail as recited in claim 12 wherein the at least one anchor includes a plurality of anchors.

14. The mounting rail as recited in claim 12 wherein the at least one anchor is attached to the support profile.

15. The mounting rail as recited in claim 1 wherein the mounting rail is partly made of metal, and/or is made of plastic.

16. A method for embedding a mounting rail in a curable construction material comprising the following steps:

arranging the mounting rail with a support profile at an embedding position;

introducing a curable construction material into a space bounded by a formwork so that the support profile comes into contact with the curable construction material via an embedding region thereof;

hardening the construction material; and

applying a non-stick coating to the support profile outside the embedding region prior to the introducing step.

17. The method as recited in claim 17 further comprising arranging a filler material in an internal space enclosed by the support profile prior to the introduction of the curable construction material, and the filler material is coated with a non-stick coating prior to the arrangement of the same in the internal space.

18. The method as recited in claim 16 wherein the non-stick coating is PTFE and/or wax and/or oil and/or grease and/or silicone.

19. The method as recited in claim 16 wherein the non-stick coating is sprayed, painted, or applied in the form of microcapsules onto the support profile or a filler material.

20. A structure or structure part comprising:

a curable construction material; and

a mounting rail embedded in the construction material, the mounting rail as recited in claim 1.