DE202019103391U1 - Clamping device for corner cladding - Google Patents

Abstract

Clamping device (10) for corner cladding, comprising an inner angle element (11), an outer angle element (12) and a connecting means (13) in order to brace the inner angle element (11) and the outer angle element (12) against one another and formwork elements ( 1, 2) to be connected to one another, characterized in that the connecting means (13) is a flexible tension element.

Description

The invention relates to a tensioning device for a corner shuttering, comprising an inner corner element, an outer corner element and a connecting means to brace the inner corner element and the outer corner element against each other and to connect shuttering elements that are at an angle to each other.

In order to cast outside or inside corners out of concrete, rigid angled formwork elements are known which have to be fixed in the corner area from inside or outside until the concrete has hardened. The provision of prefabricated angled formwork elements on construction sites in addition to the otherwise flat formwork elements represents an additional logistical effort and cost of materials.

As an alternative, clamping devices of the type mentioned are known, with the help of which two flat formwork elements, e.g. Formwork boards can be joined together at an angle so that they form an angular formwork element.

For example, the document shows DE 23 30 586 A1 Inside and outside angle elements made of steel, which can accommodate two formwork boards at an angle to each other in a corner area, which can be braced against each other in order to connect them together so that they can withstand the pressure of the liquid concrete. For this purpose, a spindle is welded to the outer angle element in the direction of the bisector, which is guided through a hole in the inner angle element. With the help of the spindle and an attached nut, the angle elements are then pulled towards each other in order to clamp the two formwork boards.

Due to the design, the formwork boards in this device are far apart in the corner area, so that the clamping device must extend over the entire length of the formwork boards in the corner area, otherwise concrete would run out between the formwork boards. In addition, such a system is expensive because of the material used and is therefore not suitable for lost formwork.

The pamphlet DE 29 2 15 733 A1 shows a similar system with inner and outer angles, in which the corner area of two formwork boards is surrounded by vertical corner timbers that have been milled accordingly. Threaded rods with washers and nuts are passed through the corner timbers as connecting means in order to brace the inside and outside angle elements against each other.

Due to the simpler design and thus lower costs, this system can in principle also be used for lost formwork. However, the system is complex to use, especially since corresponding vertical corner timbers have to be appropriately profiled and drilled to pass through the threaded rods. Tensioning with the help of the threaded rods, in particular placing washers and nuts, is also time-consuming.

It is therefore an object of the present invention to create a clamping device of the type mentioned at the outset, which can be manufactured inexpensively and therefore can also be used for lost formwork and which can be used easily, quickly and flexibly on the construction site.

This object is achieved by a tensioning device for corner cladding with the features of the independent claim. Advantageous refinements and developments can be found in the dependent claims.

A tensioning device according to the invention of the type mentioned at the outset is characterized in that the connecting means is a flexible tension element.

Instead of the spindle or threaded rod known from the prior art, a traction means is used that requires much less material than the mentioned spindles or threaded rods and is correspondingly inexpensive.

As a traction device, e.g. a (only) tensile load-bearing strap, cord or band can be used. The term “cord” is to be understood in the context of the registration regardless of the material used. In this sense, a wire or wire rope made of metal can also represent a cord. The cross section of the pulling means can be round or approximately round like a cord, or flattened like the band or the tab. Compared to a threaded rod, the elements mentioned require a significantly smaller cross-sectional width, at least in one direction, so that the formwork elements between which the traction device is passed can protrude so close to one another in the corner area that concrete is prevented from flowing through. For this reason, the tensioning device according to the invention does not need to extend along the entire length of the corner cladding. Rather, individual clamping devices, each extending only a few centimeters in the longitudinal direction of the corner cladding, can be used, which are used in a required number spaced from one another. In this way, too, a connection of the formwork elements with little use of material is made possible.

In an advantageous embodiment of the clamping device, the connecting means is formed integrally with the inner angle element or the outer angle element. In this way, manufacture can be simplified. The connecting means can preferably be releasably fastened to the inner angle element and / or the outer angle element so that the formwork can be opened again after the concrete has hardened and outer formwork elements can be removed and reused.

In a further advantageous embodiment of the clamping device, the inner angle element and / or the outer angle element has a feed-through opening for the connecting means. The connecting means is advantageously already attached to one of the angle elements, possibly integrally formed therewith, and is attached to the other of the angle elements by being guided through this passage opening and thus on the part of the user, i.e. on the side facing away from the concrete to be filled, can be gripped, tensioned if necessary and conveniently attached to the element.

The connecting means is particularly preferably a tab which is provided with a toothing, a latching tongue which engages in the toothing being formed in the region of the lead-through opening. The toothing of the tab and the locking tongue thus work together like a cable tie, so that the two angle elements can only be moved in one direction, namely towards one another and not away from one another. In this way, the two angle elements can be braced against one another simply, quickly and without tools. A gripping eyelet can also be formed at the end of the tab, into which a finger can be inserted in order to be able to clamp the angle elements against one another.

In a further advantageous alternative embodiment of the tensioning device, the connecting means is a cord, an anchor being fastened or formed at a free end of the cord, with which the cord is fastened to one of the angle elements. The other angle element can have a winding web in the area of the lead-through opening, on which the cord can be fixed. In order to simplify the fixing, the winding web can have at least one clamping incision into which the cord can be clamped.

In a further advantageous alternative embodiment of the tensioning device, the inner angle element and / or the outer angle element and / or the connecting means are made of plastic, in particular polyamide. The clamping device can e.g. can be produced simply and inexpensively in an injection molding process.

Furthermore, contact surfaces with which the inner angle element and / or the outer angle element rest on the formwork elements can advantageously be provided with a profiling and / or with a stopper surface in order to fix the formwork elements as securely as possible. A stopper surface is a surface with an increased static friction value compared to the base material of the angle elements. For profiling, e.g. Profile webs, in particular with a sawtooth profile, be formed.

• 1 eine isometrische Ansicht von Schalungselementen mit Spannvorrichtungen in einem ersten Ausführungsbeispiel;
• 2 eine vergrößerte isometrische Darstellung einer Spannvorrichtung nach 1;
• 3, 4 jeweils eine teilgeschnittene Darstellung von Teilen der Spannvorrichtung gemäß 2;
• 5 eine isometrische Ansicht von Schalungselementen mit Spannvorrichtungen in einem zweiten Ausführungsbeispiel;
• 6 eine Draufsicht auf eine Spannvorrichtung nach 5; und
• 7 die Spannvorrichtung gemäß 6 in verschiedenen isometrischen Detailansichten.

The invention is explained in the following on the basis of exemplary embodiments with the aid of figures. The figures show:

• 1 an isometric view of formwork elements with clamping devices in a first embodiment;
• 2 an enlarged isometric view of a clamping device according to 1 ;
• 3 , 4th in each case a partially sectioned illustration of parts of the clamping device according to FIG 2 ;
• 5 an isometric view of formwork elements with clamping devices in a second embodiment;
• 6 a plan view of a jig according to 5 ; and
• 7th the clamping device according to 6 in different isometric detail views.

In 1 are two examples of formwork elements 1 , 2 shown, which are arranged at right angles to each other and by jigs 10 are held according to a first embodiment to each other in the position shown.

As an indoor area 3 the space is marked in which the smaller interior angle of about 90 ° between the two formwork elements 1 , 2 as an outdoor area 4th the area of the outer angle of about 270 ° between the formwork elements 1 , 2 referred to as. The clamping device shown is particularly suitable for producing a concrete outer corner in which the inner area 3 the formwork is filled with concrete.

In the example shown, the formwork elements are flat and solid boards. Due to great flexibility with regard to the thickness of the formwork elements 1 , 2 the jig 10 however, these can also be used for other formwork elements, in particular, for example, for thicker panel formwork elements.

The jig 10 of the first embodiment is in 2 enlarged in an isometric view and in the 3 and 4th reproduced in various partially cut representations.

It has an interior angle element 11 with two legs 111 , 112 which are at an angle of 90 degrees to each other in the example shown. That indoors 3 between the formwork boards 1 , 2 lying interior angle element 11 lies with the outsides of the thighs 111 , 112 on the formwork elements 1 , 2 on.

To the formwork elements 1 , 2 The outside of the legs is to be fixed as well as possible 111 , 112 profiled, in the present case by profile webs formed on the surface 113 that have a sawtooth-like profile.

Integral on the interior angle element 11 is the lanyard 13 attached, for example by the interior angle 11 with the lanyard 13 are produced together in one piece from plastic in an injection molding process. For example, polyamide, which is elastic and has a high tensile strength, can be used as the material. The lanyard 13 is designed as a tab in this exemplary embodiment and is also referred to below for the sake of simplicity of illustration 13 called.

From the outside, ie outside 4th , becomes the exterior angle element 12 of the two formwork elements 1 , 2 formed corner put on. Also the outer angle element 12 has two legs 121 , 122 whose inside are at an angle of 90 ° to each other. The ones on the formwork elements 1 , 2 The lying inside is provided with a profile similar to that of the inside angle element 11 through profile webs 123 is formed, which have a sawtooth-shaped profile. Also the outer angle element 12 is preferably made in one piece in an injection molding process, for example again from polyamide.

In the connecting area of the two legs 121 , 122 is a feed-through opening 124 with the outer angle element 12 formed through which the tab 13 is plugged. The exterior angle element 12 then, as in 1 is shown, except for the formwork elements 1 , 2 pushed. The tab 13 has a toothing 131 on that with a locking tongue 125 cooperates in the passage opening 124 of the outer angle element is arranged.

The toothing 131 the tab 13 and the locking tongue 125 work together like a cable tie so that the two angle elements 11 , 12 can only be moved in one direction, namely towards each other and not away from each other. The surface of the locking tongue 125 also be provided with a toothing, as in 4th can be seen in the enlargement on the left.

At the end of the flap 13 is a handle loop 132 formed, which can be engaged with a finger, to the interior angle element 11 in the direction of the outer angle element 12 to pull when this on the formwork elements 1 , 2 is pressed. Due to the elasticity of the material used for the flap 13 can be used between inside and outside angle element 11 , 12 a high clamping force can be built up. By a plurality of spaced apart clamping devices 10 can so formwork elements 1 , 2 of any length can be securely and quickly connected to each other in the corner area. The connection can be established quickly and without tools.

To remove the formwork elements after the concrete has hardened, the locking tongue can be used, for example, with a screwdriver or with a specially shaped tool 125 be raised to the locking connection between the tab 13 and the exterior angle 12 to solve. The exterior angle 12 can then be pulled off and reused if necessary.

After removing the formwork elements 1 , 2 becomes the interior angle element surrounded by the concrete 11 left in the concrete and the tab protruding outwards 13 cut off at the concrete edge. Thus, the clamping device can be removed easily and without great dismantling effort.

In an alternative embodiment of the first exemplary embodiment, the tab 13 also on the outer angle element 12 be integrally attached, whereas there is a feed-through opening and a latching tongue on the inner angle element 11 are located. In the embodiment, the clamping device 10 then particularly suitable for inside corners made of concrete, i.e. for a situation where concrete is in the outside area 4th the casing is poured (cf. 1 ).

In the 5 to 7th is another embodiment of a tensioning device 10 shown. 5 initially admits 1 an isometric view of two formwork elements 1 , 2 again that with two jigs 10 be connected to each other. 6 shows the jig 10 in a plan view and the 7th gives the jig 10 in two different isometric views (left side of the figure) with enlarged sections (right side of the figure) again.

With regard to the basic structure and the choice of materials, the inner and outer angle elements in particular correspond 11 , 12 those of the first exemplary embodiment, to which reference is hereby made explicitly.

The difference is in the second embodiment 5 to 7th the connecting element 13 , which is formed in this embodiment by a cord. For the sake of simplicity, the connecting element 13 in connection with this embodiment also as a cord 13 designated.

The string 13 can consist of one or a plurality of plastic fibers, in particular polyamide fibers. As mentioned at the beginning, the term “cord” is also to be understood as a wire or a wire rope made of metal.

As from the detailed drawings of the 7th It can be seen, in the illustrated embodiment, one end of the cord 13 with a spherical anchor here 133 Mistake. In the example shown, the anchor is on the side of the interior angle 11 used. The free end of the string 13 is through the feed-through opening 124 of the external angle element 12 guided and, as described in connection with the first embodiment, are inner and outer angle element 11 , 12 by pulling the cord 13 braced against each other.

To the jig 10 Keeping it in the tensioned state is in the outer angle element 12 a winding bridge 126 trained on which the cord 13 can be wound up. The winding bridge 126 has clamping cuts for this purpose 127 on into which the cord 13 is pinched so that the cord 13 is fixed and maintains its tension.

Like the detail drawing in 7th shows is a comparable winding web 114 also on the interior angle element 11 educated. This also has clamping incisions 115 on to the cord 13 to be able to set there. The formation of winding webs 114 , 126 on both angle elements 11 , 12 allows the anchor 133 alternatively also on the side of the outer angle 12 to use and the free end when stringing on the wrapping web 114 of the interior angle element. Also can cord 13 also from a roll and without the anchor 133 can be used by attaching them to the corresponding strap on both sides 114 , 126 is attached.

Another difference to the first embodiment is that in the area of the support surfaces of the legs 111 , 112 of the interior angle element 11 and the thigh 121 , 122 of the external angle element 12 in addition to the profile webs 113 , 123 Areas are provided with a softer elastic material, e.g. polyurethane, and the stopper surfaces 116 , 128 represent. Due to a high coefficient of friction, these also ensure that the formwork elements 1 , 2 through the jig 10 be held securely to each other. Such stopper surfaces 116 , 128 can of course also be present in the first embodiment.

In the top view of the 6 are those of the interior angle element 11 and from the exterior angle element 12 spanned angle α or. β shown. In this embodiment, that is from the interior angle element 11 spanned angles α greater than 90 °, here as an example 95 °, and that of the outer angle element 12 Spanned angles smaller than 90 °, here 85 ° as an example. The clamping device is used 10 for formwork elements 1 , 2 that are at right angles to each other. By forming the outer angle element 12 less than 90 ° and the interior angle element 11 greater than 90 ° is an additional clamping effect of the formwork elements 1 , 2 between the thighs 111 , 112 or. 121 , 122 achieved. When tensioning the fastener 13 become both angular elements 11 , 12 deformed to an angle of 90 ° and exert additional tension. This configuration can also be used in the first exemplary embodiment 1 to 4th can be used.

The examples shown in the context of the application are each for formwork elements 1 , 2 designed to be at right angles to each other. It goes without saying that the clamping devices shown 10 can also be designed for formwork in which the formwork elements 1 , 2 are arranged at a different angle to each other. Even an angle of 180 ° would be conceivable, so that formwork elements can be connected to one another in one plane with the clamping devices shown.

List of reference symbols

1, 2

Formwork element

3

Indoor

4th

Outdoor area

10

Jig

11

Interior angle element

111.112

leg

113

Profile web

114

Winding bridge

115

Clamping incision

116

Stopper surface

12

Exterior angle

121.122

leg

123

Profile web

124

Feed-through opening

125

Locking tongue

126

Winding bridge

127

Clamping incision

128

Stopper surface

13th

Connecting element (strap, cord)

131

Interlocking

132

Handle loop

133

anchor

α, β

angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 2330586 A1 [0004]
• DE 29215733 A1 [0006]

Claims (14)

Clamping device (10) for corner cladding, comprising an inner angle element (11), an outer angle element (12) and a connecting means (13) in order to clamp the inner angle element (11) and the outer angle element (12) against one another and formwork elements ( 1, 2) to be connected to one another, characterized in that the connecting means (13) is a flexible tension element. Clamping device (10) after Claim 1 , in which the connecting means (13) is non-detachably attached to the inner angle element (11) or the outer angle element (12). Clamping device (10) after Claim 2 , in which the connecting means (13) is formed integrally with the inner angle element (11) or the outer angle element (12). Clamping device (10) according to one of the Claims 1 to 3 , in which the connecting means (13) can be releasably attached to the inner angle element (11) and / or the outer angle element (12). Clamping device (10) after Claim 4 , in which the inner angle element (11) and / or the outer angle element (12) has a feed-through opening (124) for the connecting means (13). Clamping device (10) after Claim 5 , in which the connecting means (13) is a tab which is provided with a toothing (131), and in which a latching tongue (125) is formed in the area of the feed-through opening (124), which engages in the toothing (131). Clamping device (10) after Claim 6 , in which a grip eyelet (132) is formed at a free end of the tab. Clamping device (10) after Claim 5 in which the connecting means (13) is a cord. Clamping device (10) after Claim 8 , in which an anchor (133) is attached or formed at a free end of the cord. Clamping device (10) after Claim 8 or 9 , in which the inner angle element (11) and / or the outer angle element (12) has a winding web (114, 126) for fixing the cord in the region of the feed-through opening (124). Clamping device (10) after Claim 10 , in which the winding web (114, 126) has at least one clamping incision (115, 127) into which the cord can be clamped. Clamping device (10) according to one of the Claims 1 to 11 , in which the inner angle element (11) and / or the outer angle element (12) and / or the connecting means (13) are made of plastic, in particular polyamide. Clamping device (10) according to one of the Claims 1 to 12 , in which the contact surfaces with which the inner angle element (11) and / or the outer angle element (12) rests on the formwork elements (1, 2) is provided with a profile and / or with a stopper surface (116, 128). Clamping device (10) after Claim 13 , in which profile webs (113, 123), in particular with a sawtooth profile, are formed for profiling on the contact surfaces.

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