DE102010041904A1 - Anchor rail with drawstring - Google Patents

Abstract

The invention relates to a filling body for an anchor rail, with an elongated filling element and a tear-off strip for removing the filling element from a receiving space of the anchor rail, which is connected to the filling element in a connection area. According to the invention it is provided that the tear-off tape is connected to the filling element in at least a part of the connection area with a length reserve. The invention also relates to an anchor rail with such a filling body and a method for producing such a filling body.

Description

The invention relates to a filling body for an anchor rail according to the preamble of claim 1. Such a filling body is formed with an elongated filling element and a tear strip for removing the filling element from a receiving space of the anchor rail, which is connected in a connecting region with the filling element. The invention further relates to a method for producing a filling body with an elongate filling element and a tear strip for removing the filling element from a receiving space of an anchor rail, in which the tear strip is connected in a connecting region with the filling element, according to the preamble of claim 6.

There are known anchored anchor rails with C-profile. Such anchor rails have on one longitudinal side two opposite rail lips, between which an opening along the anchor rail opening is formed in the interior of the anchor rail.

Since such anchor channels are placed in the formwork prior to concreting, they must be sealed against the ingress of concrete in order not to lose their function. This can be done by introducing a filling element in the receiving space of the anchor rails. Anchor rails with temporary fillers are for example from the DE 87 05 644 U , of the US 4,532,740 A and the DE 295 15 152 U1 known.

The foamy filler is usually removed before using the anchor rail. To facilitate removal of the temporary rail filling are, for example from the US 4,532,740 A and the DE 87 05 644 U , Ausreissbänder, which are mounted in the longitudinal direction of the rail at the bottom of the filler.

One way to position the anchor channels before concreting, is to apply the anchor rails to the formwork and to fix, for example by means of nails on the formwork. When the anchor rail is laid, the opening running along the anchor rail, which faces outwards on the finished concrete element for receiving fastening elements (such as, for example, hammer-head bolts), comes to bear against the formwork.

However, it has been shown that a reliable application of the anchor rail is not always possible. Under certain circumstances, it may lead to a misalignment of the anchor rail when mounting on the formwork, which may have a misalignment of the anchor rail in the finished concrete element result.

The object of the invention is to develop the prior art so that a particularly reliable positioning of the anchor channels is possible with very little effort.

The object is achieved by a filling body for an anchor rail with the features of claim 1 and a method for producing such a filling body with the features of claim 6. Preferred developments are specified in the dependent claims.

The filling element according to the invention is characterized in that the tear strip is connected to the filling element in at least part of the connecting region with a length reserve.

In the context of the invention, it has been observed that in known anchor rail the filling element under certain conditions between the rail lips outwardly from the anchor rail emerges, and that this emergence may be the reason for the observed difficulties in positioning known anchor rail on the formwork. For when the filling element emerges from the anchor rail, in the region of the rail lips no flat contact surface is given more, so that the rail can tilt when applying to the formwork.

The invention has further recognized that the undesirable effect of the emergence of the filling element and thus the difficulties in the positioning of the rail in the design of known packing can be justified. Thus, in known packing the tear strip is glued over the entire surface of the filling element. In other words, in the tension-free state, the part of the tear-out strip that forms the adhesive bond and the glued surface have the same length. However, the pull-out strip inherently has a greater tensile strength and, as a rule, also a greater tensile stiffness than the foam material. As a result, in a known packing, the rigidity over the cross-section of the packing is not constant. Such stiffnesses distributed unevenly across the cross-section, however, can lead to warping of the composite material when it comes to the attack of centric forces, and / or changes in temperature changes the tear strip and the filling element due to different thermal expansion coefficients different in their length.

Thus, in conventional combinations of filling element and tear strip in the arrangement of the drawstring below the filling element as a result of heating to a curvature of the filling come up, as the tension band has a disabling effect on the expansion of the foam. As a result, the foam is pressed outwards there by the rail lips, so that under certain circumstances no planar bearing surface is given and the difficulties mentioned in the positioning of the rail occur.

An undesirable curvature of the filling element can occur in known rails with full-surface glued tear-out not only when heated, but also when the walls of the receiving space inside the rail are not flat, but have elevations, as may be formed for example by anchoring body of the rail anchor , In this case, the elevations can be pressed into the filler, wherein the soft filling element can easily absorb this deformation. The tear strip, in which the elevations are also pressed in, however, is spatially offset by the elevations, and it form due to the existing tensile stiffness in the band considerable tensile forces. As a result, the underside pull-out strip tightens like a string and pushes the foam between the rail lips to the outside.

Both effects have in common that the squeezed out between the rail lips foam can adversely affect the nailing of the rail to the formwork, especially because no more planar contact surface is given.

This is where the invention comes in and provides for a design of the filling element in which the tear strip has a length reserve in the connection region, ie a length excess, relative to the adjacent filling element. To form such a length reserve, it may be provided, for example, that the band does not run parallel to the filling element in the connection region, but that its distance from the filling element varies along the connection region. The band extends in this case in an additional spatial direction compared to the surface of the adjacent filling element, wherein the length reserve comes from this additional spatial direction. A length reserve can thus be understood in particular to mean that the length of the tear strip in the connection area is greater than the longitudinal extension of the filling element in the connection area.

Due to this length reserve, an increase in the length of the tear strip in the longitudinal direction of the filling element is possible without the relatively tension-resistant strip having to be stretched for this purpose. The length increase in the longitudinal direction rather comes from the length reserve of the tear strip, that is, the length increase in the longitudinal direction is not effected by deformation of the tear strip, but by a geometric rearrangement of the tape. Due to the length reserve, the band thus has an effective tensile stiffness that is less than the actual tensile stiffness.

Due to the reduced effective tensile stiffness in turn, the band thermal expansions of the filling element and / or mechanical deformation of the filling element, causes z. B. by impressing surveys, follow, without causing a tension between the band and filler. A pushing out of the foam by the rail lips to the outside with the resulting, known in the prior art difficulties in the positioning of the rail is thus prevented according to the invention.

The length reserve in the pull-tab may be present in particular at least at room temperature (20 ° C.) and / or at least prior to the introduction of the filler into the anchor channel. The length reserve may be at least 1%, in particular at least 5%, preferably at least 10% or 13%, particularly preferably about 15%, d. H. the tear strip is longer by this percentage than the surface of the adjacent packing. The length reserve can then absorb thermal deformations of the filling element when heating above room temperature or mechanical deformation of the filling element during insertion into the anchor rail. In particular, according to the invention, the length reserve is present when the molded body is straight, that is, when it is in a geometric configuration that it also has inside the anchor rail.

The tear strip may preferably be fiber-reinforced. Suitably, the tear strip on a carrier tape, which may comprise, for example, polyethylene (PE), polypropylene (PP) or polyethylene terephthalate (PET). The filling element may in particular be a foam element and, for example, comprise plastic foam such as polyethylene foam, low-density polyethylene foam (LDPE) or polystyrene foam.

The connection area in which the tear strip is connected to the filling element can be connected but also be discontinuous

A length reserve according to the invention can be provided over the entire length of the connection region of the filling element. However, it is also possible to provide concentrated reserves which are applied, for example, where the elevations which press into the filling element are later located. Accordingly, it may be sufficient that the tear strip is connected to the filling element only in a part of the connection region of the filling element with a reserve of length. Concentrated reserves according to the invention can be applied by a roller having a varying surface geometry along its circumference. Thus, a roller provided over an angular range of z. B. 270 ° has a circular circumference, and over the remaining angular range (here, for example, 90 °) is provided with teeth. If the filling element is guided over this roller, we create a concentrated reserve with each revolution of the roller. Thus, continuously recurring excess areas z. B. created for rivets.

It is particularly preferred that the tear strip in the at least one part of the connecting region, in which the tear strip is connected to a length reserve with the filling element meandering, in particular undulating, with varying distance to the filling element on the filling element. Due to the meandering course, on the one hand, a particularly large length reserve can be achieved. At the same time can be realized with the filling element by the meandering course particularly many contact points, so that a particularly good bond is given. In particular, it can be provided that the band and the filling element are connected at the upper reversal points of the meander-shaped course in section.

Furthermore, it is expedient that the tear strip is glued in the connection region with the filling element. As a result, the bond between the band and filling element can be produced in a particularly simple manner. For bonding, for example, the tape may have an adhesive layer.

In particular, with regard to a particularly large length reserve, but also with regard to the production cost, it may be advantageous for the filling element to have an at least approximately planar surface in the connection region.

The invention also relates to an anchor rail, which is pourable into a component, with a rail body having a receiving space extending in the longitudinal direction of the rail body, wherein the anchor rail is characterized in that in the receiving space an inventive filling body is provided, wherein the tear-out in at least a part of the connecting region is connected to a length reserve with the filling element. Due to the length reserve of the tear strip of the receiving space arranged in the packing, so that the tape is provided with a greater length than the corresponding development of the filling element, it is ensured that the packing does not emerge from the rail with temperature changes.

The inventive method for producing a filling body is characterized in that the tear strip is connected in at least part of the connecting region to form a length reserve with the filling element.

In particular, according to the invention, this length reserve is given when the shaped body is straight and / or when it is in a geometric configuration which it also has inside the anchor rail. Due to the length of the tear strip, which is increased in relation to the underside of the filling body, there results an expansion reserve of the packing for tensile strains, which can be retrieved before the drawstring itself has to absorb tensile forces. Even local elongations, as z. B. may occur through elevations in the rail body, can be absorbed by the distributed reserves, since localized differences in expansion can quickly degrade.

For example, it can be provided that the filling element is stretched at least in regions in the longitudinal direction, in particular elastically stretched, and that the tear strip is connected in an extended region of the filling element with the filling element. Accordingly, the filling element is elastically elongated at least on the underside. In this phase, the tear strip is glued to the underside. During the subsequent reverse deformation, no compressive stress can build up in the pressure-tight tear-out strip. Consequently, the tension-free applied band retains its original length, which is now greater than that of the filler. As a result, the length reserve is formed in the band.

The filling element can be stretched over its entire length viewed in the longitudinal direction. For this purpose, for example, a tensile load can be applied to the opposite ends of the filling element. If the filling element is stretched over its entire length, the tear strip can be connected to it at the same time along the entire length of the filling element. However, the filling element can also be stretched only in regions, in which case the tape is applied to the stretched area. This is particularly advantageous with regard to a continuous process. Here, only a portion of the total length of the filling element can be stretched at any time.

The extension, that is the positive elongation of the filling element, can act in the entire cross section of the filling element. This corresponds to a pure tensile load. In principle, however, it is sufficient if the stretch is only on the underside of the filling element, ie on the side which is connected to the band. In the remaining Cross-sectional areas may have low positive strains or even negative strains.

Furthermore, it is preferred that the filling element is bent, in particular elastically bent, at least in regions, in particular around a roller and / or around a forced guidance, and that the tear-out strip is connected to the filling element in a bent region of the filling element. According to this embodiment, the filling element is bent, so that its underside is elongated relative to the neutral tear strip. This can be z. B. happen when circulating over a roll. In this state, the tape is applied. Once the curvature of the filler decreases, the elongated underside of the filler returns to its original length equal to the length of the neutral fiber. The tear-off band is pressed. Since it has no compressive stiffness, separations and corrugations, which form the length reserve, are formed in some areas.

The filling element can be bent over its entire length viewed in the longitudinal direction. If the filling element is bent over its entire length, the tear strip can be connected to it at the same time along the entire length of the filling element. However, the filling element can also be bent only partially, in which case the tape is applied to the bent region. This is particularly advantageous with regard to a continuous process. Here, only a portion of the total length of the filling element can be bent at any time.

According to the invention, the bending can be effected in particular about an axis extending transversely, preferably perpendicularly to the longitudinal direction of the filling element, wherein the at least one bending axis expediently extends above the filling element when the strip is mounted on the underside of the filling element.

A further preferred embodiment of the invention is that the filling element is profiled at least partially, in particular is elastically profiled, in particular by means of a toothed roller, and that the tear strip is connected in a profiled region of the filling element with the filling element. For example, it can be provided that a toothed roller with protruding teeth runs over the rear side of the filling element. These teeth press into the filling element and thus extend the unwinding surface of the filling element on the underside. In the subsequent application of the tear strip this follows the embossed profile, since the elastic / viscous regression of the indentation occurs delayed. Once the deformation of the packing decreases, the underside of the packing returns to its original dimensions. The tear-off band is pressed. Since it has no compressive stiffness, separations and corrugations, which form the length reserve, are formed in some areas. In contrast to the above-mentioned embodiments, the elongation of the underside in this embodiment is not continuous, but discontinuous.

The invention can also include a method for producing an anchor rail, which is pourable into a component, with a rail body, which has a receiving space extending in the longitudinal direction of the rail body. In such a method it can be provided that a filling body is produced according to the invention, and the filling body is introduced into the receiving space, wherein it is provided that at least during introduction of the filling body the tear strip in at least a part of the connecting region with a length reserve with the filling element connected is.

The features mentioned in connection with the method according to the invention can also be used in the products according to the invention, just as conversely the features mentioned in connection with the products can also be used in the methods.

The invention will be explained in more detail below with reference to exemplary embodiments, which are shown schematically in the accompanying figures. Show it:

1 an anchor rail with a filling element according to the invention in cross section;

2 a side view of the filling body 1 , wherein the meandering shape of the tear strip is greatly exaggerated for better visibility;

3 a further embodiment of a filling body in side view, wherein the meandering shape of the tear strip for better visibility is shown half greatly exaggerated;

4 a first embodiment of a method according to the invention for producing a filling body;

5 a second embodiment of a method according to the invention for producing a filling body;

6 a third embodiment of a method according to the invention for producing a filling body; and

7 A fourth embodiment of a method according to the invention for producing a filling body.

An inventive anchor, which can be poured into a component anchor rail 11 is in 1 shown. The anchor rail shown 11 has a rail body 12 on, extending in the longitudinal extension of the rail body 12 extending recording room 13 wherein, in the case of the cross-sectional view of 1 the longitudinal extent is perpendicular to the plane of the drawing. The anchor rail 11 also has a plurality on the underside of the rail body 12 projecting anchor elements, of which in 1 only a single anchor elements 14 can be seen, which obscures the remaining anchor elements. In the recording room 13 of the rail body 12 is a filler 15 intended. This consists of a filling element 16 , which may for example consist of LDPE foam, and a tear strip 21 , The escape band 21 is at the anchor elements 14 facing bottom of the filling element 16 adhesive with the filling element 16 connected. The escape band 21 runs at the anchor elements 14 attached bottom of the recording room 13 in the longitudinal extension of the rail body 12 , About the tear tape 21 can force the filler 15 be exercised, which serve to fill the body 15 at least partially from the recording room 13 to remove.

2 shows a side view of the filling body 15 out 1 , As in 2 recognizable, is the tear tape 21 in a longitudinal direction of the filling element 16 extending connection area 1 at the bottom of the filling element 16 with the filling element 16 connected. In the illustrated embodiment, the connection area extends 1 over the entire length of the filling element 16 , The connection area 1 However, in principle, only over a partial length of the filling element 16 extend.

As 2 shows further, runs the tear strip 21 in the connection area 1 not parallel to the bottom of the filling element 16 but on average meandering with varying distance to the filling element 16 , Due to this meandering shape is in the pull tab 21 formed a length reserve, which it with the Ausreissband 21 connected filling element 16 allows stretching in the longitudinal direction, without causing tension with the tear strip 21 comes.

The escape band 21 also has an excess length 24 on, with the tear-off band 21 over the bottom of the filler 16 protrudes, and the one grabbing the tear tape 21 allows.

3 shows a side view of a further embodiment of a filling element according to the invention 15 , The embodiment of the 3 differs from the embodiment of the 2 in that a meander shape and thus a length reserve of the tear strip 21 only in part of the connection area 1 given is. In particular, the length reserve in the region of the anchor elements 14 be provided because it is to be expected with tension that can be intercepted by the length reserve.

4 shows a first embodiment of an inventive method for producing a filling body 15 , As 4 shows, here is the filler 16 stretched in the longitudinal direction, and the tear strip 21 in the stretched state of the filling element 16 associated with this. After joining, the tensile load of the filling element 16 lifted, so that the filling element can elastically re-deform. Here, the length reserve in the tear strip 21 educated.

5 shows a second embodiment of a method according to the invention for producing a filling body 15 , As 5 shows, here is the filler 16 entirely to a role 40 bent around and the tear tape 21 in the bent state of the filling element 16 connected with this, on the role 40 and thus the bending axis facing away from the filling element 16 , After joining, the bending of the filling element is released, so that the filling element elastically in the z. In 2 shown straight state can deform back. Here, the length reserve in the tear strip 21 educated.

6 shows a third embodiment of an inventive method for producing a filling body 15 , According to the embodiment of 6 becomes the filling element 16 continuously around a roll 41 guided around and while local to the role 41 bent. In area 44 this local bend becomes the pull-out band 21 with the filling element 16 connected. In the of the role 41 passing areas of the filling element 16 becomes the bend of the filler 16 lifted, leaving the filling element 16 can deform back into a straight state. Here, the length reserve in the tear strip 21 educated.

7 shows a fourth embodiment of an inventive method for producing a filling body 15 , According to the embodiment of 7 becomes the filling element 16 continuously on a toothed roller 50 passed by and a profiled area 55 on the surface of the filling element 16 educated. In profiled area 55 becomes the pull-out band 21 with the filling element 16 connected, the connection as in 7 shown by the effect of the toothed roller 50 , but in principle also separated from the sprocket 50 respectively can. In the of the sprocket 50 passing areas of the filling element 16 relaxes the profiling of the filling element 16 so that the filling element 16 can deform back into a non-profiled state. Here, the length reserve in the tear strip 21 educated.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 8705644 U [0003, 0004]
• US 4532740 A [0003, 0004]
• DE 29515152 U1 [0003]

Claims (9)

Packing ( 15 ) for an anchor rail ( 11 ), with an elongated filling element ( 16 ) and a tear tape ( 21 ) for removing the filling element ( 16 ) from a recording room ( 13 ) the anchor channel ( 11 ), which in a connection area ( 1 ) with the filling element ( 16 ), characterized in that the tear strip ( 21 ) in at least part of the connection area ( 1 ) with a reserve of length with the filling element ( 16 ) connected is. Packing ( 15 ) according to claim 1, characterized in that the tear strip ( 21 ) in the at least part of the connection area ( 1 ) meandering with varying distance to the filling element ( 16 ) on the filling element ( 16 ) runs. Packing ( 15 ) according to one of the preceding claims, characterized in that the tear strip ( 21 ) in the connection area ( 1 ) with the filling element ( 16 ) is glued. Packing ( 15 ) according to one of the preceding claims, characterized in that the filling element ( 16 ) in the connection area ( 1 ) has an at least approximately flat surface. Anchor rail ( 11 ), which is pourable into a component, with a rail body ( 12 ) extending in the longitudinal direction of the rail body ( 12 ) extending receiving space ( 13 ), characterized in that in the receiving space ( 13 ) a packing ( 15 ) according to one of claims 1 to 4, in which the tear strip ( 21 ) in at least part of the connection area ( 1 ) with a reserve of length with the filling element ( 16 ) connected is. Method for producing a filling body ( 15 ) with an elongate filling element ( 16 ) and a tear tape ( 21 ) for removing the filling element ( 16 ) from a recording room ( 13 ) an anchor rail ( 11 ), in which the tear strip ( 21 ) in a connection area ( 1 ) with the filling element ( 16 ), characterized in that the tear strip ( 21 ) in at least part of the connection area ( 1 ) while forming a reserve of length with the filling element ( 16 ) is connected. Method according to claim 6, characterized in that the filling element ( 16 ) is stretched at least in regions in the longitudinal direction, and that the tear strip ( 21 ) in an extended region of the filling element ( 16 ) with the filling element ( 16 ) is connected. Method according to claim 6 or 7, characterized in that the filling element ( 16 ) is bent at least in certain areas, in particular around a roll ( 40 . 41 ), and that the tear tape ( 21 ) in a bent area ( 44 ) of the filling element ( 16 ) with the filling element ( 16 ) is connected. Method according to one of claims 6 to 8, characterized in that the filling element ( 16 ) is profiled at least in regions, in particular by means of a toothed roller ( 50 ), and that the tear tape ( 21 ) in a profiled area ( 55 ) of the filling element ( 16 ) with the filling element ( 16 ) is connected.

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