AT520792A1 - Formwork for a prefabricated staircase - Google Patents

Abstract

A formwork (1) for a prefabricated staircase has a formwork lower part (7), two lateral and substantially vertical formwork walls (2), each with an upper edge (8), and at least one upper counter formwork wall (7) normal to the formwork walls (2), which on joints (11) with pivot axes (12) on the shuttering walls (2) is pivotally mounted, on. The counter-formwork wall (7) is arranged at least partially between the shuttering walls (2).

Description

a lower formwork part, two lateral and essentially vertical formwork walls with an upper edge, and at least one upper, normal to the formwork walls

Counter formwork wall, which is pivotally mounted on the formwork walls via joints with swivel axes.

In civil engineering, prefabricated stairs made of hardening, mineral building material, especially concrete, are used. Such prefabricated stairs are usually cast or manufactured with a step area and an upper and / or lower, adjoining platform area lying in formwork provided for this purpose. Such formwork is known for example from CN 1049244425 A and WO 2008/033037 Al.

The one that runs obliquely when the stairs are installed

The step area is produced essentially horizontally during the manufacture of the finished stairs, whereas a platform area adjoining the step area, which runs horizontally in the installed state of the stairs, is inclined during the manufacture of the finished stairs.

A formwork suitable for manufacturing such prefabricated stairs has vertical formwork walls running to the side over the entire length. Furthermore, the formwork has a lower formwork part which has a central, sawtooth-shaped sub-floor, which forms a negative form of the steps to be produced. In the longitudinal direction of the formwork, flat sub-floors in the form of an inclined plane adjoin this central sub-floor, which either extend upwards beyond the step area or down to below the step area, depending on whether an upper and / or a lower platform area is also produced shall be.

2.30

In order to be able to produce a platform area with a constant thickness, a counter-formwork wall must be arranged in the formwork section for the platform area, which, as mentioned, lies diagonally in the formwork, parallel to the flat sub-floor. During the manufacture of the stairs, the level of the building material poured into the formwork increases in the downward inclined one

Formwork section for the platform area up to the upper edge of the side formwork walls. Subsequently, the formwork section can also be filled for the platform area pointing obliquely upwards.

A disadvantage of such known formwork for prefabricated stairs is that, in particular, the position and the orientation of the formwork section for the pedestal area in the formwork, which points obliquely downwards, that is to say in the installation position of the finished stairs, can only be produced with great effort because an individual adaptation to different inclinations Platforms with different thicknesses take a lot of time and have great potential for errors.

The invention is therefore based on the object of providing a formwork of the type mentioned at the outset which can be adapted in a simple manner for the production of differently shaped, in particular differently steep and / or long, prefabricated stairs.

This object is achieved according to the invention with a formwork which has the features of claim 1.

Preferred and advantageous embodiments of the invention are the subject of the dependent claims.

According to the invention, it is provided that the counter formwork wall is at least partially arranged between the formwork walls.

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It is particularly advantageous with the formwork according to the invention that the inclination of the counter-formwork wall for the platform area can be changed and fixed simply and quickly, so that the formwork can be used to manufacture prefabricated stairs of different steepness. Since the counter formwork wall is arranged between the formwork walls, i.e. between these is inclined downwards and does not rest on them, there is a further advantage that an adaptation of the lateral formwork walls is not necessary.

It is particularly preferred in the invention if the

Counter formwork wall at least up to the upper edges of the

Formwork walls are enough. The lateral formwork walls can have a constant height along the entire formwork and, since the counter-formwork wall extends to the upper edges of the lateral formwork walls, the formwork can be filled with building material up to these upper edges. The building material, which has not yet hardened, can simply be pulled off at the upper edges to create a smooth surface that will later be the bottom view or underside of the stairs. Alternatively, the step area can of course also be covered with a counter formwork wall. In such an embodiment, the building material which has not yet hardened does not have to be pulled off at the upper edges of the formwork in order to produce a smooth surface.

The embodiments described above primarily relate to formwork sections for platforms which are inclined downwards. In addition, in the invention, a formwork section for platforms that are inclined upwards can also be used, which is also closed at the top by a counter-formwork wall, with which a platform area that projects obliquely upwards in the formwork can be produced in a simple manner, without this not yet hardened building material has to be removed from the upper edges of the formwork in order to produce a smooth surface.

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In a particularly advantageous embodiment, the joints are arranged in the region of the upper edges of the formwork walls.

It is particularly preferred if the joints can be adjusted and fixed along the upper edges. The upper edges thus form a kind of horizontal guide to position the counter formwork wall at different positions in the formwork. The formwork can thus be particularly easily adapted to the manufacture of prefabricated stairs of different lengths and thicknesses.

It is particularly preferred in the invention if the joints have pivot axes that intersect the upper edges of the formwork walls and if the counter-formwork wall extends at least, preferably essentially exactly, to the pivot axis. In this embodiment of the invention, an upper edge of the counter-formwork wall lies essentially exactly at the level of the upper edges of the side formwork walls, which on the one hand ensures that the formwork cavity can be filled with building material up to the upper edge of the formwork walls, and on the other hand no area of the counter-formwork wall protrudes.

An advantageous embodiment of the invention is characterized in that at least one of the joints has a support part which is arranged on the formwork wall in the region of the upper edge, in particular can be connected to it, and a swivel part which is arranged on the counter formwork wall, in particular connected to it , Has, and that the pivot part is mounted on the support part pivotable about the pivot axis.

In a particularly preferred embodiment of the invention, first means, in particular, are in the area of the upper edges on the lateral formwork walls at fixed intervals

Depressions or projections or bores or pins,

5/30 arranged on which the joints can be fixed. These means make it easier to position the joints at defined points on the side formwork walls.

In a further development of this embodiment, the support part of the joint can have at least one second means, in particular a recess, preferably a bore, or a projection, preferably a pin, with which the joint can be fixed on the lateral formwork wall.

For example, the first and second means are shaped in opposite directions, e.g. as a hole on the upper edge and as a pin on the support part, and can be fixed to one another or connected to one another. This allows a very simple and safe determination of the position of the joint and thus the counter formwork wall in the longitudinal direction of the side

Formwork wall.

Alternatively, it can also be provided that the support part on the formwork wall via a connecting element connecting the first and the second means, in particular through a recess in the support part and in the formwork wall in the region of the upper edge, in particular a bolt, a pin or a screw , is set.

In the case of the invention it can also be provided that an intermediate part, in particular an intermediate strip, is arranged between the formwork wall and the support part, which has at least a third means which is assigned to the first means in the region of the upper edge of the formwork wall, and at least a fourth means , which is assigned to the second means on the support part of the joint. The third and fourth means can, for example, have a recess, in particular a bore, or a projection, preferably a pin. The third and fourth means can be the same or one from the other

6/30 have different shape and size, for example

Bores with different diameters.

The form and assignment of the first and third as well as second and fourth means can, for example, but of course not necessarily, be carried out as described above for the first and second means. In particular, the support part may not have a recess, but rather a projection that is adapted to the recess of the intermediate part, for example a peg-shaped or groove-shaped projection, with which it is arranged in one of the recesses of the formwork wall, in particular inserted therein.

By varying the distance between the third and fourth

The position of the

Counter formwork wall can be precisely defined on the formwork walls in the longitudinal direction of the formwork.

In an alternative embodiment of the invention, the formwork wall in the area of the upper edge can be connected to the intermediate part by means of a connection connecting the first and third means, in particular by a recess in the formwork wall and the

Intermediate part guided, first connecting element, in particular a bolt, pin or screw, are connected. Furthermore, the support part can be connected to the intermediate part via a second connecting element, in particular a bolt, a pin or a screw, which is guided through a recess in each of the support part and the intermediate part.

What is particularly advantageous about the use of the intermediate part, in particular the intermediate strip, is that the joint can be positioned very easily on site at the correct location along the formwork wall, by simply arranging the intermediate strip, which is already provided with the appropriate recesses, between the formwork wall and the joint and associated with these

7/30 will. This reduces the risk of the joint being fixed in an incorrect position due to inaccuracy on the part of the operating personnel on site. The recesses on the

For a rough adjustment, the formwork wall can be spaced so far apart that it immediately stands out if the joint is positioned incorrectly.

By using the intermediate part or by the distance of the means arranged on the intermediate part, for example bores, for connecting the intermediate part to the formwork wall on the one hand and the joint on the other hand, the position of the joint on the formwork wall can subsequently be set precisely.

It when the swivel part on is particularly advantageous

Support part is arranged laterally outside of the formwork walls, and engages around the upper edge from above, because the pivoting part thereby the arrangement and in particular the flexible

Adjustment of the counter formwork wall between the side walls is not hindered.

Further details, features and advantages of the invention will become apparent from the following description with reference to the attached drawings, in which preferred embodiments are shown. It shows:

Fig.l is an isometric view of an inventive

Formwork,

2 shows a sectional view of a detail A of the formwork according to the invention from FIG. 1, with a joint arranged on an upper edge of a formwork wall, and

3 shows a side view of the detail shown in FIG. 2, the joint, unlike in FIG. 2, being pivoted by a pivot angle.

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1 shows a formwork 1 according to the invention in an isometric view, the formwork 1 having vertical, laterally formwork walls 2 with upper edges 8, and wherein the formwork walls 2 are arranged above and along a lower formwork part 3. On the formwork lower part 3 and between the formwork walls 2, a central, sawtooth-shaped sub-floor 4 is arranged at least in sections, which has an interior space or

Formwork cavity of formwork 1 limited at the bottom. The thickness of the step section of the finished stairs can be adjusted by the height at which this middle sub-floor 4 is installed in the formwork 1, or the distance of the middle sub-floor 4 from the upper edge 8.

Furthermore, the formwork 1 has formwork sections 5 for shuttering platform areas, each of which has a flat sub-floor 6 and a counter-formwork wall 7 arranged parallel thereto. If a formwork section 5 is provided for shuttering an upper platform area of the finished stairs, the flat sub-floor 6 extends upwards from the central sub-floor 4. In the formwork section 5 shown in FIG. 1 in the middle region of the formwork 1, the flat sub-floor 6 projects beyond the formwork walls 2, the counter-formwork wall 7 adjoining the upper edges 8 of the formwork walls 2 and extending obliquely upwards away from them. If the formwork section 5 is provided for shuttering a lower platform area of the prefabricated stairs, the flat sub-floor 6 extends downward from the central sub-floor 4, the

Counter formwork wall 7 runs obliquely downwards and is at least partially, but preferably entirely, arranged between the formwork walls 2.

In the embodiment shown, the formwork 1 has at its two ends additional formwork wall sections 9 and 10 for non-displaceable in the longitudinal direction

Formwork sections 5. The additional

Formwork wall sections 9 are fixed to the formwork walls 2

9/30 connected and protrude beyond the upper edges 8. The additional formwork wall sections 10 are also firmly connected to the formwork walls 2 and protrude below the upper edges 8. Between these additional formwork wall sections 9 and 10 of the non-displaceable formwork sections 5, two formwork sections 5 which can be displaced in the longitudinal direction of the formwork 1 are arranged, so that if required, two finished steps of different length and shape can also be produced with the formwork 1 shown.

Embodiments of the formwork 1 according to the invention with more than two mobile formwork sections 5, with which more than two prefabricated stairs can be produced simultaneously and / or with none or only one that cannot be moved

Formwork section 5 are possible within the scope of the invention, as are embodiments in which no additional formwork wall sections 9, 10 are provided.

In the context of the invention, embodiments of the formwork 1 according to the invention are also possible in which above the central sub-floor 4, i.e. between the adjacent formwork sections 5, a further, essentially horizontal counter-formwork wall is arranged, not shown in the figures. This additional counter formwork wall can, for example, rest on the upper edges 8 of the side walls 2 and be fixed against lifting off.

Between two formwork sections 5 and between the

Side walls 2 can be arranged with a side shutter 17 that is essentially parallel to the side walls 2. By positioning and fixing the formwork 17 between the side walls 2, the width of a formwork area delimited to the side by the formwork 17 can be varied so that prefabricated stairs of different widths can be produced by filling the limited formwork area. The lateral formwork 17 has an upward upper edge 20 and

10/30 a downward lower edge 21. The upper edge 20 of the lateral formwork 17 runs essentially horizontally in the area of the central sub-floor 4 and essentially parallel to it in areas of flat sub-floors 6, so that preferably one or both of the counter-formwork walls 7 of the formwork sections 5 and optionally another one, between the formwork sections 5 arranged counter formwork wall rests on the upper edge 20 of the formwork 17. The lower edge 21 of the formwork 17 is shaped analogously to the middle sub-floor 4 and to the flat sub-floors 6 which may adjoin it, so that the lower edge 21 of the formwork 17 lies tightly against the sub-floors 4, 6.

FIG. 2 shows a joint 11 of the formwork 1 according to the invention shown in a detail A of FIG. 1 in a sectional view that runs perpendicularly along a pivot axis 12 of the joint 11. The joint 11 is shown in this figure in the non-pivoted state, the swivel arm 48 connecting the counter-formwork 7 to the joint 11 being oriented horizontally.

The joint 11 has a support part 13 and a pivot part 14, the pivot part 14 being pivotable about the pivot axis 12 relative to the support part 13.

The support part 13 has a support plate 15 on which a support plate 16 is arranged, in particular welded on. The support plate 16 is arranged at a right angle to the support plate 15.

The formwork wall 2 of the formwork 1 according to the invention has a frame profile 18 which is arranged on an essentially vertical formwork wall panel 19, in particular welded to it. The upper edge 8 of the formwork wall 2 and the

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Formwork wall panel 19 is, preferably only slightly, higher than the frame profile 18.

The frame profile 18 is designed as a hollow profile with an essentially rectangular cross section, but can also be solid and / or have a different cross section, for example, plate-shaped.

On an upper side 23 of the frame profile 18, an intermediate part is arranged, which is designed as an intermediate bar 24 in the embodiment shown. The intermediate bar 24 is preferably narrower than the frame profile 18, so that the frame profile 18 protrudes to the side, away from the formwork wall panel 19, via the intermediate bar 24.

The joint 11 is arranged with the support plate 16 of the support part 13 above the intermediate bar 24. The support plate 16 can rest directly on the intermediate bar 24, but there can also be a narrow gap between the support plate 16 and the intermediate bar 24, as shown in FIG. 2.

Within the formed by the plates 15, 16 to

Frame profile 18 directed right angle, several, preferably two, support ribs 25 are arranged orthogonally to the support plate 16 and the support plate 15. The support ribs 25 run from the support plate 15 approximately to the intermediate bar 24 and lie with a lower edge on the upper side 23 of the frame profile 18.

On one side of the support plate 16 opposite the support ribs 25, several, preferably two, support ribs 26 are arranged orthogonally to the support plate 16 and to the support plate 15, at the angle formed by the plates 15, 16.

The frame profile 18 has a plurality of first means for fixing the joint 11 in the longitudinal direction along the upper edge 8

12/30, the first recesses in the illustrated embodiment

27, in particular holes.

The intermediate bar 24 has third and fourth means for fixing, which in the embodiment shown are further recesses 28, 29, preferably bores.

The support plate 16 has a second means for fixing, which in the embodiment shown is a second recess 31, preferably a bore, and leads through the support plate 16.

A first connecting element 32, which is preferably designed as a bolt or pin, connects the first and the third means by being guided or inserted through the first recess 28 in the intermediate strip 24 and through the further recess 27 in the frame profile 18, so that the Intermediate bar 24 is fixed or fixed along the frame profile 18 at a certain position.

A second connector 33 that is like the first

Connecting element 32 as a bolt or pin, preferably with a different diameter, connects the second and fourth means by passing through the further recess 29 in the intermediate strip 24 and through the second recess 31 in the support plate 16 of the support part 13 . is plugged in, so that the support part 13 and thus the joint 11 fixes at a certain position of the intermediate strip 24 or

is set.

Embodiments are also possible in which the

Connecting elements 32, 33 are not inserted, but are screwed in, or in which the connecting elements 32 and the recesses 27, 28, 29, 31 are not circular, but have a different shape, for example a rectangular shape.

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In particular, however, embodiments are also possible in which one or both connecting elements 32, 33 are dispensed with, by, for example, instead of the recess 28 in the intermediate strip 24 and the recess 31 in the support plate 16, pins or the like being fitted, which in the respectively associated recess 27 in the frame profile 18 and the recess 29 in the intermediate bar 24 are inserted. This is also possible in reverse. The advantage of this embodiment with pins or the like is that no connecting elements 32, 33 are required which can be lost or jammed. Of course, only one of the two recesses 28, 29 can be replaced by a pin or the like.

Furthermore, embodiments are possible in which additional further recesses 28, 29 are provided in the intermediate bar 24 and / or additional recesses 31 in the support plate 16, so that the intermediate bar 24 passes through on the frame profile 18 and / or the support part 13 on the intermediate bar 24 further connecting elements 32, 33 can be fixed more firmly.

Also not shown in the drawings are possible

Embodiments of the formwork according to the invention without

Intermediate bar 24, such as an embodiment in which there are no support ribs 25 and the joint 11 with the support plate 16 rests directly on the frame profile 18.

The support plate 15 of the support part 13 bears laterally against a side surface 34 of the frame profile 18 facing away from the formwork wall 2. A cylindrical pin 35 is fixed to the support plate 15, in particular welded to it, and projects orthogonally from a side surface 36 of the support plate 15 facing away from the formwork wall 2.

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The pin 35 is received in a sleeve 37 of the pivot member 14 and can be in the sleeve 37 in the direction of

Swivel axis 12 of the joint 11 shifted and around

Swivel axis 12 are rotated.

At one end of the sleeve 37 protruding from the side surface 36 of the support plate 15, there is a circular disk 39 through which a screw 41 is guided, which is screwed into the pin 35.

The sleeve 37 is received in a hole 38, which passes through a side plate 40 of the swivel part 14, and fixedly connected, preferably welded, to the side plate 40.

Below the sleeve 37, the side plate 40 has

Through hole 45 on which on the side surface 44 of the

Side plate 40 a nut 46 is arranged, in particular welded. A clamping screw 47 is screwed into the nut 46 and protrudes through the through hole 45 in the direction of the side surface 36 of the support plate 15. By screwing in the clamping screw 47, it presses on the support plate 15, so that the support part 13 is pressed away from the pivot part 14 against the frame profile 18 , wherein the pivoting part 14 is supported on the support part 13 via the sleeve 37, the washer 39, the screw 41 and the pin. In this way, the entire device, that is, the formwork via the joint 11 with the counter-formwork wall 7, is tensioned and thus fixed.

A swivel arm 48 is arranged, in particular welded, on an upper edge of the side plate 40 and is orthogonal to the side plate 40. The swivel arm 48 projects on one side of the side plate 40 into the area of the formwork beyond the formwork wall 2 and on the opposite side a little beyond the side surface 44 of the side plate 40. The pivot arm 48 is connected to the counter formwork wall 7, not shown in FIG. 2.

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Between the swivel arm 48 and the side plate 40, and orthogonally thereto, a pull tab 50 is arranged, in particular welded, which is preferably in one plane with the

Pivot axis 12 runs. The pull tab 50 projects laterally with a section beyond the sleeve 37 and the swivel arm 48 and has a further hole 51 in this section. The hinge 11 can be tensioned against the frame profile 18 from above by means of a tensioning element (not shown), for example a tensioning strap, which engages in this further hole 51.

Fig. 3 shows a detail of the formwork according to the invention, with the joint 11 pivoted by a pivot angle α, in a side view.

It can be seen that the support part 13 is fixed to the intermediate bar 24 via the bolt-shaped second connecting element 33, the second connecting element 33 being guided or inserted through the second recess 29 of the intermediate bar 24 and through the recess 31 of the support part 13.

Furthermore, the intermediate bar 24 with the first

Connecting element 32 at a certain position on

Frame profile 18 fixed, wherein the bolt-shaped first connecting element 32 is guided or inserted through the first recess 28 of the intermediate bar 24 and through one of the recesses 27 of the frame profile 18.

In the illustrated embodiment of the formwork according to the invention, the pivot axis 12 runs essentially at the same height as the upper edge 8 of the formwork wall 2. A further embodiment, not shown in the drawings, in which the pivot axis 12 of the joint 11 extends above the upper edge 8 is shown in FIG Framework of the invention as well

16/30 possible, as an embodiment in which the pivot axis 12 of the joint 11 extends below the upper edge 8.

In the embodiment shown in FIG. 1, only the joint designated by the reference number 11 is designed as described for FIGS. 2 and 3. The further joints designated by reference numeral 22 in FIG. 1 can be designed like the joint described in relation to FIGS. 2 and 3, but this is not mandatory. In the context of the invention, all joints 11, 22 can also be designed differently.

17/30

LIST OF REFERENCE NUMBERS 1 formwork 2 formwork wall 29 second further recess 3 Shuttering base 30 - 4 middle sub-floor 31 recess 5 formwork section 32 first connecting element 6 flat underbody 33 second 7 Opposing formwork wall Verbindungselernent 8th top edge 34 Side surface of the 9 additional frame profile Formwork wall sections 35 spigot 10 additional 36 Side surface of the Formwork wall sections support plate 11 joint 37 shell 12 swivel axis 38 hole 13 supporting part 39 disc 14 pivoting part 40 side plate 15 support plate 41 screw 16 platen 42 - 17 formwork 43 - 18 Frame pro f i1 44 Side surface of the 19 Formwork wall plate side plate 20 upper edge 45 Through Hole 21 lower edge 46 mother 22 further joint 47 clamping screw 23 top 48 swivel arm 24 intermediate strip 49 - 25 bearing rib 50 pull tab 26 supporting rib 51 another hole 27 recesses 28 first further recess α swivel angle

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Claims (15)

1. Formwork (1) for a prefabricated staircase with a lower formwork part (3), two lateral and essentially vertical formwork walls (2) each with an upper edge (8), and at least one upper counterforming wall (7) normal to the formwork walls (2) which is pivotably mounted on the formwork walls (2) via joints (11) with pivot axes (12), characterized in that the counter-formwork wall (7) is at least partially arranged between the formwork walls (2). 2. Formwork according to claim 1, characterized in that the counter formwork wall (7) extends at least to the upper edges (8) of the formwork walls (2). 3. Formwork according to claim 1 or 2, characterized in that the joints (11) are arranged in the region of the upper edges (8). 4. Formwork according to claim 3, characterized in that the joints (11) along the upper edges (8) are adjustable and fixable. 5. Formwork according to one of claims 1 to 4, characterized in that the pivot axes (12) intersect the upper edges (8) and the counter-formwork wall (7) at least, preferably substantially exactly, up to the Swivel axes (12) is sufficient. 6. Formwork according to claim 4 or 5, characterized in that in the region of the upper edges (8) at predetermined intervals, first means, in particular recesses (27) or projections, preferably bores or pins, are arranged, on which the joints (11) can be fixed are. 19/30 7. Formwork according to one of claims 3 to 6, characterized in that at least one of the joints (11) has a pivot part (14) which on the Counter formwork wall (7) is arranged, in particular connected to it, and is mounted so as to be pivotable about the pivot axis (12). 8. Formwork according to claim 7, characterized in that the joint (11) has a support part (13) which is arranged on the formwork wall (2) in the region of the upper edge (8), in particular can be connected thereto, and that the pivoting part (14) is pivotally mounted on the support part about the pivot axis (12). 9. Formwork according to claim 8, characterized in that the support part (13) has at least a second means, in particular a recess (31) or a projection, preferably a bore or a pin, with which it can be fixed to the formwork wall (2) is. 10. Formwork according to claim 8 or 9, characterized in that the support part (13) on the formwork wall (2) via a connecting the first means and the second means, in particular through the recess (31) in the support part and one of the recesses ( 27) first in the formwork wall (2) in the area of the upper edge (8) Connecting element (32), in particular a bolt, a pin or a screw, is fixed. 11. Formwork according to one of claims 8 to 10, characterized in that an intermediate part, in particular an intermediate strip (24), is arranged between the formwork wall (2) and the support part (13), and that Intermediate part at least a third means, in particular a further recess (28) or a projection, preferably a bore or a pin that the first 20/30 Means in the area of the upper edge (8) of the formwork wall (2) is assigned, and at least a fourth means, in particular a further recess (29) or a projection, preferably a bore or a pin, which the second means on the support part (13) assigned to the joint (11). 12. Formwork according to claim 11, characterized in that the formwork wall (2) with a in the region of the upper edge (8) with the intermediate part, in particular the intermediate strip (24), via a connecting the first and the third means, in particular by one Recess (27, 28) of the formwork wall (2) and the intermediate part guided, first connecting element (32), in particular a bolt, pin or screw, is connected, and / or that the support part (13) with the intermediate part, in particular the Intermediate strip (24), via a second connecting element (33) connecting the second and fourth means, in particular through a recess (29, 31) of the support part (13) and the intermediate part, in particular a bolt, a pin or a screw, connected is. 13. Formwork according to one of claims 7 to 12, characterized in that the swivel part (14) is arranged outside the formwork walls (2) and is mounted on the support part (13), and that the swivel part overlaps the upper edge (8). 14. Formwork according to one of claims 1 to 13, characterized in that the pivot axes (12) of the joints (11) lie in a plane with a surface which is formed by an underside of the counter-formwork wall (7). 15. Formwork according to one of claims 1 to 14, characterized in that between the formwork walls (2) 21/30 is arranged essentially parallel to the formwork walls (2), lateral formwork (17), and that the Counter formwork wall (7) on an upper edge (20) of the Formwork (17) rests.