CORNER SHUTTERING ELEMENT FOR SHUTTERING AND DESHUTTERING OF INNER CORNERS

Abstract

The invention relates to a corner shuttering element with two limbs (12, 14) arranged at an angle to each other, on the outer edge of which limbs (12, 14), edge strips (16, 18) are arranged that can be retracted and extended by means of articulated levers (24, 26), wherein the edge strips (16, 18) can each be aligned and fixed in their position by means of a plurality of locking elements (34) arranged distributed over the height of the corner shuttering element, and wherein the locking elements (34) are arranged on guides (32) for pull-out webs (30) of the edge strips (16, 18).

Claims

1. Corner shuttering element for shuttering and deshuttering of inner corners, in particular of shafts, comprising two limbs (12, 14) which are arranged so as to be at an angle relative to one another and which can each be connected to one further shuttering element, respectively, and on the limbs (12, 14) of which retractable and extendable edge strips (16, 18) are arranged in each case, on the outside edge, it being possible for the edge strips (16, 18), together with the further shuttering elements, to be retracted and extended by means of a plurality of articulated levers (24, 26) arranged on a common tension rod (28), and it being possible for the edge strips (16, 18) to in each case be oriented and fixed in position, with respect to the outside (12.1, 14.1) of the limb, by means of a plurality of bolt elements (34) that are arranged so as to be distributed over the height of the corner shuttering element (10), characterized in that the bolt elements (34) are arranged on guides (32) for extraction struts (30) of the edge strips (16, 18).

2. Corner shuttering element according to claim 1, characterized in that the outer edge (12.2, 14.2) of the limbs (12, 14) is in each case formed by an angle section, one profile limb of which is fastened to a base body of the limb (12, 14), and the second profile limb (12.2, 12.4) of which, together with the outside (12.1. 14.1) of the base body, forms a shuttering skin of the limb (12, 14), and in that the edge strip (16, 18) can be placed, from the inside, against the profile limb (12.2, 14.2) of the angle section that forms the shuttering skin, by means of the bolt elements (34).

3. Corner shuttering element according to claim 2, characterized in that the edge strips (16, 18) can be oriented by means of the bolt elements (34) such that they bring the profile limbs (12.2, 14.2) of the angle section, which also form the shuttering skin, into an orientation that is flush with the outside (12.1, 14.1) of the base body, and fix them in said position.

4. Corner shuttering element according to any of the preceding claims, characterized in that the bolt elements (34) in each case comprise one adjustable clamping jaw (40), respectively, which engages on the extraction strut (30).

5. Corner shuttering element according to claim 4, characterized in that the bolt elements (34) are in each case formed so as to be substantially U-shaped, and the clamping jaw (40) is mounted in the base (38) of the U and is linearly displaceable between the limbs (42, 44) of the U.

6. Corner shuttering element according to either claim 4 or claim 5, characterized in that the clamping jaw (40) is manually adjustable.

7. Corner shuttering element according to any of the preceding claims, characterized in that the bolt elements (34) are fastened to the guide (32) of the extraction strut (30) by means of a screw (36) or a bolt in each case, the screw (36) or the bolt being guided through a slot in the extraction strut (30) in a manner having axial clearance.

8. Corner shuttering element according to any of the preceding claims, characterized in that one bolt element (34), in each case, is arranged at least on the bottom guide (32) for an extraction strut (30) of the edge strip (16, 18).

9. Corner shuttering element according to any of the preceding claims, characterized in that the bolt elements (34) are arranged so as to be uniformly distributed over the height of the corner shuttering element (10).

10. Corner shuttering element according to any of the preceding claims, characterized in that it is 1.20 m, 2.70 m, 3.00 m, 3.30 m or 3.60 m high.

11. Bolt element for a corner shuttering element (10) according to any of claims 1 to 10.

12. Bolt element according to claim 11, characterized by a U-shaped base body and a clamping jaw (40) that is linearly displaceable in the base body and is intended for engagement on the guide (32) of an extraction strut (30) of the corner shuttering element (10).

Description

[0014] Further advantages and properties of the invention will be explained in greater detail in the following, on the basis of an embodiment and with reference to the drawings.

[0015] In detail:

[0016] FIG. 1 is a perspective inside view of a corner shuttering element according to the invention;

[0017] FIG. 2 is an enlarged detailed view of the corner shuttering element from FIG. 1;

[0018] FIG. 3 is an individual view of a bolt element of the corner shuttering element from FIG. 1.

[0019] FIG. 1 shows a corner shuttering element 10 according to the invention for inner shuttering (not otherwise shown in greater detail) for a shaft. The corner shuttering element 10 comprises two limbs 12, 14 that are arranged so as to be at right-angles to one another, the outsides 12.1, F forming a shuttering skin of the corner shuttering element 10. The limbs 12, 14 each comprise outside edge portions 12.2, 14.2 which are in each case formed of a metal profile and fastened to a limb base body. Within said edge portions 12.2, 14.2, in each case edge strips 16, 18 can be retracted and extended in the arrow directions 20, 22. Articulated levers 24, 26 are provided for this movement of the edge strips 16, 18, which levers can be actuated by pulling on a tension rod 28. For this purpose, the edge strips 16, 18 comprise extraction struts 30 which are guided in guides 32 on the inside of the limbs 12, 14. Bolt elements 34 are fastened to some of said guides 32, which bolt elements are used to orient the edge strips 16, 18 in the direction of the shuttering skin 12.1, 14.1, as shown in particular in FIG. 2.

[0020] FIG. 2 is an enlarged view of the detail II from FIG. 1. The fastening of the bolt element 34 to the guide 32 of the extraction strut 30 by means of a screw 36 can be seen. The screw 36 is guided through a slot (not shown) in the extraction strut 30 in a manner having lateral clearance, such that the movement of the edge strip 18 in the arrow direction 22 is not impeded by the bolt element 34. The extraction struts 30 can therefore move freely along the guides 32, said movements of the edge strips 16, 18 being triggered by the articulated levers 26.

[0021] As is also clear in particular from FIG. 3, the bolt element 34 is substantially U-shaped, a clamping jaw 40 being mounted in a base 38 of the U so as to be displaceable between limbs 42, 44 of the U. In order to adjust the clamping jaw 40, a threaded spindle 46 is provided, on which spindle an adjusting wheel 48 for manual adjustment of the clamping jaw 40 is arranged.

[0022] As shown in FIG. 2, the clamping jaw 40 presses laterally on the extraction strut 30 and thus moves said strut, as well as the edge strip 18 (not shown in FIG. 2) fastened thereto in the direction of the shuttering skin 14.1. Since the edge strip 18 rests against the edge portion 14.2 of the limb 14 from the inside, said edge portion 14.2 can be oriented and stabilized using the bolt elements 34, such that it can withstand the concrete pressure, arising during concreting, in the same way as the base bodies of the limbs 12, 14. In this case, in particular the bolt elements 34 in the bottom region of the corner shuttering element 10 are of particular significance, since the concrete pressure acting on the limbs 12, 14 is greatest in said region.

[0023] In FIG. 1, the edge strips 16 and 18 are extended, i.e. the corner shuttering element 10 and further shuttering elements (not shown here) that adjoin the edge strips 16, 18 together form an inner shuttering, for example for a shaft or building corner. In this case, four corner shuttering elements 10 of this kind can be interconnected, by means of at least one further shuttering element in each case, to form a complete inner shaft shuttering. For the purpose of deshuttering, the edge strips 16, 18 and the shuttering element adjoining said strips can be pulled inwards by means of pulling on the tension rod 28, using the articulated levers 24, 26. If this is carried out on all four corner shuttering elements 10 of the inner shaft shuttering, then all the shuttering elements can be released from the concreted wall and the inner shaft shuttering, as a single shuttering body, can be reduced in volume such that the entire shuttering body can be withdrawn upwards, out of the shaft.

[0024] The corner shuttering elements 10 can be produced in different heights. Conventional heights are 1.20 m, 2.70 m, 3.00 m, 3.20 m and 3.60 m. The design according to the invention ensures that a smooth concrete surface results on the inside of the shaft, even in the case of high corner shuttering elements 10.