EP2022910A1 - Mounting element for an anchor - Google Patents

Abstract

The fixture element comprises a clamping bracket (11, 11?) that is mounted under tension in section of the anchor (1) and the core wire (2). The clamping bracket may have an U-shaped path with two shanks (13, 14, 13?, 14?) and a connecting section (15, 15?). The shanks of the clamping bracket may be curved off and may be surrounded in the path of the connecting section?s perpendicular direction of the core wire. The connecting section between the shanks of the clamping bracket may surround the anchor, whilst there may be a tensioning element (12, 18, 18?) that is connected with the clamping bracket and mountable with the anchor.

Description

The present invention relates to a fastener for securing an anchor to a reinforcement of a concrete part.

The present invention further relates to a transport anchor for a concrete part with a rope, wherein the rope is formed into a loop, with at least one sleeve through which the cable is guided, wherein the sleeve in the cast with the concrete part state at a reinforcement supported the concrete part.

The prestressed concrete parts are today produced in almost any length by extrusion. Due to the large masses to be moved to the correspondingly cut finished parts, transport anchors for receiving crane hooks or transporting trays are often cast during production in the concrete part.

The transport anchors known from the prior art are rope loops, usually made of wire rope, whose anchored in the concrete part end extends substantially parallel to the flat walls of the concrete part, while the frontally led out eye of the loop is angled so that it is substantially perpendicular extends to the plane of the generally plate-shaped element. The eyes of the loops during casting or extrusion of the concrete part are arranged in the form of the edge and can therefore be easily exposed after the production process from the still soft concrete, so that they are available for the transport of the concrete part.

A transport anchor, in which a bending of the eye of the loop relative to the anchored in the concrete part end by an angled metallic sleeve, which frictionally enclosing the rope is caused, for example, from DE 33 22 646 known.

A problem with the transport anchors known from the prior art is that they can slip during the extrusion of the concrete part in the mold due to the comparatively high forces acting on them by the concrete flowing into the mold. If, however, the position of the lifting anchor changes during the production of the concrete part, the finding of the anchor after completing the extrusion process is often made more difficult because the anchor is not in the position in which it was originally inserted into the mold. In addition, it can do that come that an anchor can not be exposed, since he has moved so far from the front, that unreasonable amounts of concrete would have to be removed to expose.

Concrete parts, in particular precast concrete parts, as used in modern construction in a variety of configurations, e.g. as wall or ceiling elements, have in their interior reinforcements. These reinforcements serve as elements that absorb forces acting on the concrete parts. In addition, they can bias the concrete parts, in particular for prestressed concrete ceilings, in the unloaded state.

From the prior art it is therefore known to fasten the lifting anchors with the help of construction wire to the inserted into the mold for the concrete part reinforcements. Due to the low transferable forces through the wire, however, this type of attachment only leads to an insufficient fixation. In particular, the cable loops remain displaceable and pivotable relative to the reinforcement. In addition, the attachment by means of wire requires the use of tools such as wire cutters and pliers, and is very time-consuming and labor-intensive.

Compared to this prior art, the present invention seeks to provide a fastener for securing a transport anchor to a reinforcement of a concrete part available, which avoids the disadvantages of the prior art and a simple, but permanent attachment of the transport anchor to a reinforcement of the Concrete part allows, the transport anchor is easy and if possible without additional tools or with a simple tool quickly and safely attachable to the reinforcement.

This object is achieved in that a fastener for attaching an anchor, in particular a lifting anchor on a reinforcement of a concrete part, in particular a precast concrete part, is provided, wherein the fastening element has a clamping bracket, which in the assembled state portions of the armature and the reinforcement below Forming encompasses tension. Such a fastener can be produced with low material and cost and still allows a simple, i. tool-free attachment of the anchor to a reinforcement of a concrete part which has sufficient strength so that the anchor is held in place during extrusion of the concrete in the mold.

Particularly preferred is an embodiment of the fastener, wherein the clamping bow has a substantially U-shaped course with two legs and a connecting portion, wherein the legs of the tension bracket are bent such that they in a direction substantially perpendicular to the course of the connecting portion of the Reinforcement or the tensioning wire can engage around and the connecting portion between the legs of the clamping bracket can embrace the anchor. This geometric shape of the tension bow causes in the mounted state of the clamping bracket presses the reinforcement form-fitting in the angle of the armature, whereby so large frictional forces between the armature and the reinforcement are generated, that the armature can not be moved along the reinforcement. Also, in embodiments of the invention in this way, a pivoting of the armature can be prevented by the axis formed by the reinforcement. In addition, the open ends of the anchor can be attached to another reinforcement. In this way, the anchor is fixed in all directions in the desired position on the reinforcement.

In particular, it is expedient if the fastening element has a tensioning element which is connected to the tensioning bow, wherein the tensioning element can be positively and / or positively connected to the anchor. In this case, the clamping element biases the clamping bracket in the mounted state against the reinforcement in such a way that it is pressed into the bending or bending of the armature as described above.

According to one embodiment, the clamping bracket and the clamping element are each hook-shaped in order to engage behind the reinforcement with one hook part and with the other hook part a part of the anchor.

Furthermore, it may be useful if the clamping bracket and the clamping element are hinged together.

In a preferred embodiment, the clamping bracket and / or the clamping element made of steel, preferably steel wire. However, alternative embodiments in other materials, e.g. modern engineering plastics, conceivable.

In this case, the clamping bracket and / or the clamping element preferably has a cross section with a diameter of about 2 mm to 6 mm, particularly preferably of 3 mm.

Also useful are embodiments in which the clamping bracket and the clamping element are made in one piece.

The object underlying the invention is also by an anchor, in particular a lifting anchor, for a concrete part with a rope, wherein the rope is formed into a loop, and with at least one sleeve through which the cable is guided, wherein the sleeve in the with the concrete part potted state supported on a reinforcement of the concrete part, solved, wherein the anchor has a fastener, as described above has.

Preferred is an embodiment of the anchor, in which the clamping element through the loop is non-positively connected to the anchor. In this way, a tensile force on the Tensioning bow exerted, which biases the connecting portion of the tensioning bow in the direction of the loop of the rope of the anchor, so that the legs press against the reinforcement and press this force or form-fitting against the anchor.

Particularly preferred is an embodiment in which the clamping bracket is designed such that it is supported in the mounted state on the armature, preferably the sleeve of the armature, so that the forces acting on the clamping bracket in the mounted state find an abutment.

It is useful if a lever is formed by the support of the clamping bracket in the mounted state on the armature, preferably the sleeve, which converts the tensile forces of the clamping element into a force which the legs of the tension bracket against the reinforcement and thus the reinforcement against push the anchor. In this way, a frictional connection between clamping bracket, reinforcement and another element of the armature, preferably the sleeve is achieved.

In an alternative embodiment, the clamping element which is supported on the sleeve of the armature, the clamping bracket tensioned in such a way that the legs of the tension bracket press the reinforcement in the mounted state against the armature or the sleeve of the armature.

In a particularly preferred embodiment, two cable sections are guided through the sleeve, so that the sleeve forms the closed end of the loop, wherein the sleeve connects the two cable sections frictionally with each other.

The sleeve may preferably be a cylindrical element or a rectangular tube which is pressed onto the rope. Such a sleeve is for example made of steel.

It is expedient if the sleeve is angled approximately in the middle of its longitudinal extent, so that in the installed and molded state, the loop of the transport anchor extends substantially parallel to the end face of the concrete part, while the open end of the loop, which in the concrete part is anchored, is arranged substantially perpendicular thereto.

It is expedient if the sleeve is angled at 80 ° to 120 °, preferably at about 90 °.

Preferred is an embodiment of the invention in which the sleeve in the region of the bend along its longitudinal extent has a substantially part-circular transition between the angled portions of the sleeve, so that the sleeve is substantially form-fitting manner to the reinforcement of a concrete part can be applied. In this way, the strength of the connection between the lifting anchor and reinforcement is further increased.

It is particularly useful when the fastener is so movably connected to the transport anchor, preferably with the sleeve that fastener and lifting anchor form a unit. In this way, none of the parts can be lost before assembly.

Figur 1

zeigt eine erste Ausführungsform eines Transportankers mit erfindungsgemäßem Befestigungselement in einer seitlichen Ansicht in Längsrichtung.

Figur 1a

zeigt eine vergrößerte Ansicht des Befestigungselementes mit Transportanker aus Figur 1.

Figur 2

zeigt den Transportanker aus Figur 1 in einer Ansicht von oben in Längsrichtung.

Figur 2a

zeigt eine vergrößerte Ansicht des Befestigungselementes mit Transportanker aus Figur 2.

Figur 3

zeigt den Transportanker aus den Figuren 1 und 2 in einer seitlichen Ansicht in Querrichtung.

Figur 4

zeigt eine alternative Ausführungsform des Transportankers in einer Ansicht von oben, wobei die Seilschlaufe weggebrochen dargestellt ist.

Figur 5

zeigt eine seitliche Ansicht des Transportankers aus Figur 4 vor der Befestigung an der Bewehrung.

Figur 6

zeigt eine seitliche Ansicht des Transportankers aus Figur 4 beim Befestigen an der Bewehrung.

Further advantages, features and applications of the present invention will become apparent from the following description of preferred embodiments and the accompanying figures.

FIG. 1

shows a first embodiment of a transport anchor with inventive fastener in a side view in the longitudinal direction.

FIG. 1a

shows an enlarged view of the fastener with lifting anchor FIG. 1 ,

FIG. 2

shows the transport anchor FIG. 1 in a view from above in the longitudinal direction.

FIG. 2a

shows an enlarged view of the fastener with lifting anchor FIG. 2 ,

FIG. 3

shows the transport anchor from the FIGS. 1 and 2 in a lateral view in the transverse direction.

FIG. 4

shows an alternative embodiment of the transport anchor in a view from above, wherein the cable loop is shown broken away.

FIG. 5

shows a side view of the transport anchor FIG. 4 before attachment to the reinforcement.

FIG. 6

shows a side view of the transport anchor FIG. 4 when attaching to the reinforcement.

FIG. 1 shows a side view of the transport anchor 1, which is mounted on a reinforcement 2 by means of the fastening element 3 according to the invention. The transport anchor 1 consists essentially of a steel cable 4, which is formed into a support loop 6 and which has free ends 7, which are poured into a precast concrete element. In FIG. 1a is the fastener off FIG. 1 enlarged for the sake of clarity.
Thus, the first straight steel cable 4 receives its required for the transport anchor shape, it is first bent to a loop eye 6, wherein the free ends of the steel cable 7 are inserted through a sleeve 5, which is subsequently pressed non-positively with the rope, so that the eye 6 is formed permanently. So that the transport anchor can be poured into a concrete part, the loop eye 6 and the free ends of the steel cable 4 must have an approximately right angle to each other. For this purpose, the sleeve is bent in its center by approximately 90 °, wherein it should be ensured that the sleeve in the region of the angle has a continuous transition between its two mutually perpendicular legs 8, 9. In particular, on the inside, the curvature 10 of the sleeve must have a radius which corresponds essentially to the radius of the reinforcement 2. In this way, a good fit between reach the sleeve 5 and the reinforcement 2, which increases the frictional forces between these two elements 2, 5. In this case, the sleeve is machined in the region of the bend during pressing with the steel cable such that the cross section of the sleeve in the region of the bend is less than the cross section of the sleeve before or after the bend.

The in the FIGS. 1 to 3 sleeve shown is a rectangular tube made of sheet steel.

Before pouring or extruding the concrete part of the transport anchor 1 is inserted into the shape of the concrete part that extends the free end 7 of the steel cable 4 substantially parallel to the wall surfaces of the concrete part, wherein the free end 7 is oriented such that it is in shows the body of the concrete part inside. The cable eye 6 of the steel cable 4, however, is substantially parallel to one of the end faces of the concrete part and is located in close proximity to the front, so that the eye 6 can be exposed after the completion of the concrete part on the front side and for receiving a crane hook or Carrying harness is available.

In order to prevent slippage of the transport anchor 1 within the mold for the concrete part during the extrusion of the concrete due to the force exerted by the concrete on the lifting anchor 1 forces, the transport anchor 1 is fastened by means of the fastening element 3 according to the invention to the reinforcement 2 of the concrete part.

In the in the FIGS. 1 to 3 illustrated embodiment, the fastening element on a clamping bracket 11 and a clamping element 12. The clamping bracket 11 consists of a steel wire with 3 mm diameter with a substantially U-shaped course. This U-shape of the tension bracket 11 is good in the views of Figures 2 and 3 to recognize. Due to the U-shaped profile of the tension bow 11, this two legs 13, 14 and a connecting portion 15 between the two legs 13, 14 on. The legs 13, 14 are bent so that they surround the reinforcement 2 in a direction which is substantially perpendicular to the course of the connecting portion 15. This encompassing of the reinforcement 2 is clear in the Figures 1 and 1a to recognize.

Figures 2 and 2a show a view of the transport anchor with the fastener in a view from above, wherein in FIG. 2a the image section of the fastener is shown enlarged.
The clamping bracket 11 is further configured so that the connecting portion 15 to the in Figures 2 or 2a with 16, 17 designated points on the sleeve 5 is supported. For mounting the transport anchor, the transport anchor is first applied to the reinforcement 2 so that the reinforcement in the bend 10 of the sleeve 5 comes to rest. Then the clamp 11 is based on FIG. 1 introduced from the bottom left, so that its legs 13, 14 surround the reinforcement 2, while the connecting portion 15 engages around the upper leg 8 of the sleeve 5. Below is the clamping element 12 connected to the connecting portion 15 of the tensioning bow 11 is guided through the eye 6 of the wire rope 4 and clamped under tension with its tensioning portion 18 on the sleeve 5. The clamping element exerts on the connecting portion 15 of the tension bow 11 a pulling force in the direction of the eye 6, whereby the clamping bracket 11 is pivoted about the reinforcement 2 around until the connecting portion 15 at the points 16, 17 engages with the sleeve 5 in engagement , Upon application of further tensile force by the clamping element 12 of the bracket is pivoted about the points 15, 16, whereby the legs 13, 14 of the tension bracket 11 are pressed against the reinforcement. Thus, the reinforcement is pressed firmly into the curvature of the bend of the sleeve 5. In this way, a firm connection between the sleeve of the lifting anchor 1 and the reinforcement 2 is made. In this case, the biasing of the clamping bracket 11 by means of the clamping element 12 by hand or with a simple pliers. Although the assembly can be done by hand, acting on the connection between the sleeve 5 and the transport anchor 1 and reinforcement 2 forces are sufficiently high due to the action of the lever to cause a permanent connection between the elements.

FIG. 3 shows a side view of the transport anchor 1 with fastener 3 in the transverse direction, which is particularly clear how the legs 13, 14 of the fastener 3 engage around the reinforcement.

In the FIGS. 4 to 6 an alternative embodiment of the fastener is shown schematically. In the view from the top in FIG. 4 is the clamping bracket 11 'can be seen, which has a substantially U-shaped course, as before, with two legs 13', 14 'and a connecting portion 15'. In this case, the connecting portion 15 'serves as a clamping element of the fastening element, so that in this embodiment, the clamping bracket and the clamping element are made in one piece. The legs 13 ', 14' of the clamping bracket 11 'embrace the reinforcement 2 as before, at least in sections. In order to provide the necessary clamping force of the bracket 11 'and to press the reinforcement 2 against the sleeve 5, the connecting portion 15' of the tension bracket 11 'as in FIG. 4 illustrated configured, wherein it has a curved shape, so that the middle portion 18 'of the tension bracket 11' is supported on the sleeve 5 and the clamping bracket 11 'biases resiliently against the reinforcement 2.

In order to mount the bracket 11 ', the legs 13', 14 'of the bracket 11' not quite as far around the reinforcement 2 around, as in the embodiment of the FIGS. 1 to 3 the case is. The encompassing of the reinforcement 2 is clear in the lateral views of the FIGS. 5 and 6 to recognize. In this case, the clamping bracket 11 is pressed from above on the reinforcement 2, that the curved portions 13 ', 14' slip over the reinforcement 2 and engage in this. As well as the connecting portion 15 'and the legs 13', 14 'are slightly springy, the user can also in this embodiment, the clamping bracket 15' to mount by hand and a Establish firm connection between the reinforcement 2 and the sleeve 5 and the transport anchor.

LIST OF REFERENCE NUMBERS

1

Lifting anchor

2

reinforcement

3, 3 '

fastener

4

rope

5

shell

6

Eye of the bend

7

free ends of the steel cable

8, 9

angled portions of the sleeve

10

Curvature of the sleeve

11, 11 '

tensioning bow

12

clamping element

13, 13 '

leg

14, 14 '

leg

15, 15 '

connecting portion

16, 17

contact points

18, 18 '

clamping section

Claims (15)

Fastening element (3, 3 ') for fastening an anchor (1) to a reinforcement (2) of a concrete part, characterized in that it comprises a tensioning bow (11, 11') which, in the assembled state, comprises sections of the anchor (1) and the Reinforcement (2) engages positively under tension. Fastening element (3, 3 ') according to Claim 1, characterized in that the tension bow (11, 11') has a substantially U-shaped profile with two legs (13, 14, 13 ', 14') and a connecting section (15, 15 '), wherein the legs (13, 14, 13', 14 ') of the clamping bracket (11, 11') are bent in such a way that in a direction substantially to the course of the connecting portion (15, 15 ') perpendicular direction of the reinforcement (2) and the connecting portion (15, 15 ') between the legs (13, 14, 13', 14 ') of the clamping bracket (11, 11') can engage around the armature (1). Fastening element (3, 3 ') according to Claim 1 or 2, characterized in that it has a tensioning element (12, 18, 18') which is connected to the tensioning bow (11, 11 '), the tensioning element (12) being frictionally and / or positively engageable with the armature is engageable. Fastening element (3) according to one of claims 1 to 3, characterized in that the clamping bracket (11, 11 ') and the clamping element (12, 18, 18') are each hook-shaped to one hook part with the reinforcement and with the other Hook part of a part of the anchor behind. Fastening element (3) according to one of claims 1 to 4, characterized in that the clamping bracket (11, 11 ') and the clamping element (12, 18, 18') are hinged together. Fastening element (3) according to one of claims 1 to 4, characterized in that the clamping bracket (11, 11 ') and the clamping element (12, 18, 18') are made in one piece. Anchor (1) for a concrete part with a rope (4), the rope being formed into a loop, and with at least one sleeve (5) through which the rope is guided, the anchor (1) being in the assembled state on a reinforcement (2) of the concrete part, characterized in that it comprises a fastening element (3) according to one of claims 1 to 6. Anchor (1) according to claim 7, characterized in that the clamping element (12) can be frictionally connected to the armature through the loop. Anchor (1) according to claim 7 or 8, characterized in that the clamping bracket (11, 11 ') in the mounted state on a further element of the armature (1), preferably the sleeve (5), supported, so that an abutment to is formed by the reinforcement on the clamping bracket (2) applied forces. Anchor (1) according to any one of claims 7 to 9, characterized in that the clamping bracket (11, 11 ') forms a pivotable about the support lever. Anchor (1) according to any one of claims 7 to 10, characterized in that two cable sections are guided through the sleeve, so that the sleeve (5) terminates the loop, wherein the sleeve (5) connects the two cable sections with each other non-positively. Anchor (1) according to one of claims 7 to 11, characterized in that the sleeve (5) is angled approximately in the middle of its longitudinal extent. Anchor (1) according to claim 12, characterized in that the sleeve (5), preferably angled by 80 ° to 120 °, more preferably by about 90 °. Anchor (1) according to claim 12 or 13, characterized in that the sleeve (5) in the region of the bend along its longitudinal extent has a substantially part-circular transition between the mutually angled portions (8, 9) of the sleeve, so that the sleeve ( 5) is substantially form-fitting manner to the reinforcement (2) of a concrete part can be applied. Anchor (1) according to one of claims 7 to 14, characterized in that the fastening element (3, 3 ') is connected to the armature, preferably to the sleeve.

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