DE202009004864U1 - Permanent formwork with swiveling bottom part - Google Patents

Abstract

Lost formwork for concrete construction with a first lateral formwork wall (1), a second side formwork wall (2) and a bottom part (3), wherein the two side formwork walls (1, 2) consist of a composite material, wherein the composite material at least one of cross - (4, 5) and longitudinal bars (6, 7) constructed metallic lattice and at least one grid openings covering the flexible plastic film (8, 9), wherein at least one boundary edge (13) at least the first lateral formwork wall (1) by a longitudinal bar is formed, characterized in that the bottom part (3) is connected to at least the first lateral formwork wall (1), that the bottom part (3) about the boundary edge (13) of the first lateral formwork wall (1) is pivotable.

Description

Technical area

The The invention relates to a lost formwork with swiveling Bottom.

State of the art

Out The prior art discloses a multiplicity of lost formworks. which are at least partially made of a composite material. A commonly used composite material consists of a Lattice work and one connected to the latticework plastic film.

One from the EP 0 075 641 A1 known composite material consists of a metallic lattice work and a one-sided or two-sided, the grid openings covering, flexible plastic shrink film. For the production of the composite material, the plastic film and the metallic lattice work in tracks or pieces are placed in parallel and aligned and shrunk in this position, the plastic film on the latticework. The film and the lattice are thereby continuously withdrawn from a supply and each lying on a shrinking device fed. In the shrinking device, the plastic film is softened by means of a hot gas stream and pressed against the latticework.

The DE 20 2007 008 975 U1 discloses a lost formwork in an L-shape, which can be assembled in a two-part variant by overlapping into a U-shape. In addition, a large number of lost formwork is known from the prior art, which are delivered to the construction site in a significantly increasing the transport volume, angled shape.

In spite of the large number of known lost formwork persists a need for space-saving transport and also on site easy to set up in the desired formwork formwork.

Presentation of the invention

Here implements the invention. There should be a lost formwork available be made, which can be produced inexpensively, can be transported cheaply and assembled easily. This object is achieved by the use a lost formwork according to independent Claim 1 solved. Further advantageous aspects, Details and embodiments of the invention will become apparent from the dependent Claims, the description and the drawings.

The inventive lost formwork for The concrete construction comprises a first lateral formwork wall, a second lateral Schalungswandung and a bottom part. The two lateral formwork walls are made of a composite material, wherein the composite material at least one of transverse and longitudinal bars constructed metallic lattice and at least one of the grid openings covering, includes flexible plastic film. At least one boundary edge at least the first lateral Schalungswandung is by a longitudinal bar educated. According to the invention, the bottom part is such connected to at least the first lateral formwork wall, that the bottom part around the formed by the longitudinal bar Limiting edge of the first lateral Schalungswandung pivotable is trained.

by virtue of the pivotable design of the bottom part relative to at least a Formierungswandung can bottom part and formwork wall transported horizontally or flatly arranged next to each other become. The erection of the formwork wall relative to the bottom part takes place shortly before the use of the formwork on the construction site. The lost formwork can easily by folding up the formwork wall be brought into the desired shape. In contrast to a transport of the formwork in its finished molded design can the formwork by the pivotal design of the bottom part plan and thus space-saving and cost-effective as a flat material be transported.

According to one preferred embodiment of the present invention is also at least one boundary edge of the second lateral Formwork wall formed by a longitudinal bar, wherein the bottom part in such a way with the second lateral Schalungswandung Connected to that, the bottom part around the through the longitudinal bar formed boundary edge of the second lateral Schalungswandung pivotally is trained. In this embodiment, the formwork completely flat and thus transported in a particularly space-saving manner become.

According to a particularly preferred embodiment, the bottom part is made up of a metallic latticework consisting of interconnected transverse and longitudinal bars. The boundary edges of the bottom part are formed by transverse and longitudinal bars, wherein at least two transverse bars of the bottom part have at least a first limiting longitudinal bar of the bottom part protruding portions. The cross bars of the bottom part have in the over the first limiting longitudinal bar of the bottom portion protruding portions of a substantially U-shaped configuration, wherein the U-shaped portions of the boundary edge of the first lateral Schalungswan embrace the idea.

By encompassing the boundary edge of the side formwork wall through the U-shaped sections of the crossbars the bottom part is a hinged connection of the bottom part and Formwork wall reached. Due to the articulated connection can the lost formwork on the construction site by pivoting the The bottom part is light, safe and fast in the desired Be brought form.

In a further embodiment, all Cross bars of the bottom part over the first limiting Longitudinal bar of the bottom part protruding sections with a essentially U-shaped shape, with the U-shaped Sections the boundary edge of the first lateral formwork wall embrace. As a result, a secure connection of bottom part and Schalungswandung achieved.

Besides can the formwork wall also in the case of a formwork with larger horizontal expansion without the risk of tilting around their through a longitudinal bar formed boundary edge are pivoted.

According to one Particularly preferred embodiment, at least two transverse bars of the bottom part over both limiting Longitudinal bars of the bottom part protruding sections having a substantially U-shaped configuration, wherein the protruding beyond the first limiting longitudinal bar U-shaped sections the boundary edge of the first lateral Embrace shuttering wall and over the second limiting Longitudinal bar projecting U-shaped sections embrace the boundary edge of the second lateral Schalungswandung. By this embodiment, it becomes possible both Formwork walls pivotally connected to the bottom part. Thereby can transport the entire formwork in a space-saving manner and simply put it into shape on the construction site become. The shell body can in this case without large Time and effort on site be brought into a U-shape. It It should be mentioned that the U-shaped formwork is the same long or unequal length or equal height or unequal high formwork walls can have.

Especially Preferably, all cross bars of the bottom part over both limiting longitudinal bars of the bottom part protruding Sections having a substantially U-shaped configuration on, wherein the protruding beyond the first limiting longitudinal bar U-shaped sections the boundary edge of the first lateral Formwork wall surround and the second limiting longitudinal bar projecting U-shaped sections of the boundary edge embrace the second lateral Schalungswandung. In this embodiment a secure connection of the bottom part and the two formwork walls reached. Both formwork walls can also be used in the case a formwork with a larger horizontal extent without the risk of tilting around their respective by a longitudinal bar formed boundary edge are pivoted.

Prefers the bottom part comprises at least one of the grid openings of the bottom part forming lattice covering, flexible plastic film. The additional plastic film is a down closed, trough-shaped formwork formed.

According to one In another embodiment, the bottom part comprises at least two, substantially mutually parallel metallic Cross bars, wherein the cross bars in their end portions connected to the transverse bars of the lateral formwork walls are and of the transverse bars of the bottom part and the Enclosed boundary edges of the side shuttering walls Surface covered by at least one flexible plastic film is. By dispensing with longitudinal bars results a reduced material consumption and thus a more cost-effective Production of floor parts.

Especially Preferably, the number of transverse bars of the bottom part is smaller as the number of transverse bars at least the first formwork wall. Particularly preferred is the ratio of Number of cross bars of the bottom part to the number of cross bars the first formwork wall maximum 3: 4, more preferably maximum 2: 3 and more preferably at most 1: 2. By the lower Number of transverse bars of the bottom part may be the bottom part particularly simple and with little effort around the lower boundary edge the formwork wall are pivoted. The pivoting process is based in this embodiment, essentially bending the cross bars of the bottom part. Such bending is the easier it is, the smaller the number of bends Cross bars is.

Particularly preferably, moreover, the number of transverse bars of the bottom part is smaller than the number of transverse bars of the second shuttering wall. Particularly preferably, the ratio of the number of transverse bars of the bottom part to the number of transverse bars of the second shuttering wall is a maximum of 3: 4, more preferably a maximum of 2: 3, and most preferably a maximum of 1: 2. Due to the smaller number of transverse bars of the bottom part, the bottom part can be pivoted particularly easily and with little effort around the lower boundary edge of the formwork wall. The pivoting be Also in this embodiment, it substantially rests on bending the cross bars of the bottom part. Such a bending is possible the easier the smaller the number of transverse bars to be bent. In the event that the number of transverse bars of the bottom part is less than the number of transverse bars of both ^• formwork walls, both formwork walls can be pivoted easily and with little effort around its lower boundary edge.

Especially Preferably, at least one transverse bar of the bottom part has a smaller one Diameter on than the cross bars at least the first formwork wall. Especially preferred are all cross bars the bottom part has a smaller diameter than the cross bars at least the first formwork wall. As the formwork walls must withstand the concrete pressure, the diameter can and also the number of transverse bars of the formwork walls not be reduced arbitrarily. Depending on the Type of use of the formwork may be a certain number of transverse bars per unit of horizontal extent of the formwork not fallen below become. Likewise, the transverse bars of Schal formwandung have a certain minimum thickness, so that a deformation of the Bars under concrete pressure can be excluded.

According to a preferred embodiment of the present invention is used as a flexible plastic film, a shrink film which has shrunk onto the latticework, wherein the lattice is formed as a shrinking forces receiving support frame. The use of a shrink film facilitates the manufacture of the composite significantly compared to conventional plastic films. The latticework designed as a supporting frame provides the necessary strength, which allows the use of the composite in many ways, even under load. As shrink film are particularly suitable polyethylene films. A method and apparatus for making such composite materials with shrunk plastic film are described in detail in US Pat EP 075 641 A1 described, to which reference is hereby made in this context.

The formworks according to the invention are preferred as foundation formwork, edge formwork, in particular as edge formwork used with frost apron.

Brief description of the drawings

The Invention will be described below with reference to embodiments explained in more detail in connection with the drawings become. Show it

1 a perspective view of a lost formwork according to the present invention prior to assembly;

2 a perspective view of the lost formwork according to 1 after assembly;

3 a perspective view of another embodiment of a lost formwork according to the present invention.

Ways to execute the invention

1 shows a perspective view of a lost formwork according to the present invention prior to assembly. The formwork consists of two lateral formwork walls 1 and 2 and a bottom part 3 , The two lateral formwork walls 1 and 2 consist of a composite material, the one from cross bars 4 . 5 and longitudinal bars 6 . 7 constructed lattice and the grid openings covering flexible plastic film 8th . 9 includes. The lower boundary edge 13 the first lateral formwork wall 1 and the lower boundary edge 16 the second lateral formwork wall 2 are each formed by a longitudinal bar. The bottom part 3 consists of a metallic latticework that consists of interconnected crossbars 10 and longitudinal bars 11 is constructed. In this case, the cross bars 10 over the limiting longitudinal bars 11 and 14 of the bottom part 3 protruding sections 12 and 15 on. The sections 12 and 15 have a U-shaped shape. The U-shaped sections 12 and 15 of the bottom part 3 are intended to the lower boundary edge 13 the first lateral formwork wall 1 and the lower boundary edge 16 the second lateral formwork wall 2 to embrace, as in 2 is shown.

2 shows the in 1 illustrated formwork in assembled condition. The U-shaped sections 12 and 15 of the bottom part 3 surround the lower boundary edge 13 the first lateral formwork wall 1 or the lower boundary edge 16 the second lateral formwork wall 2 , The described articulated connection of the bottom part 3 with the formwork walls 1 . 2 causes the bottom part 3 around the lower boundary edge 13 the first lateral formwork wall or around the lower boundary edge 16 the second lateral formwork wall 2 can be swiveled. 2 shows the two lateral formwork walls 1 . 2 in upright form, resulting in a U-shaped formwork.

3 shows a perspective view of another embodiment of a lost formwork according to the present invention. The Formwork consists of two lateral formwork walls 1 and 2 and a bottom part 3 , The two lateral formwork walls 1 and 2 consist of a composite material, the one from cross bars 4 . 5 and longitudinal bars 6 . 7 constructed lattice and the grid openings covering flexible plastic film 8th . 9 includes. The lower boundary edge 13 the first lateral formwork wall 1 and the lower boundary edge 16 the second lateral formwork wall 2 are each formed by a longitudinal bar. The bottom part 3 consists of three substantially parallel metallic transverse bars 20 , The cross bars 20 are in their final stages 23 with the crossbars 4 . 5 the lateral formwork walls 1 . 2 welded. The of the crossbars 20 of the bottom part 3 and the lower boundary edges 13 . 16 the lateral formwork walls 1 . 2 enclosed area is of a flexible plastic film 17 covered.

The number of crossbars 20 of the bottom part 3 is three, which is less than the number of crossbars 4 . 5 the two Formungswandungen, each having five cross bars. The smaller number of transverse rods compared to the formwork walls 20 of the bottom part 3 causes the bottom part 3 around the lower boundary edge 13 the first lateral formwork wall or around the lower boundary edge 16 the second lateral formwork wall 2 can be swiveled. The panning is done by one with low

Force possible bending of the cross bars 20 of the bottom part 3 in the area of the end sections 23 , 3 shows the two lateral formwork walls 1 . 2 in upright form, resulting in a U-shaped formwork.

1

first shuttering

2

second shuttering

3

the bottom part

4

crossbars the first formwork wall

5

crossbars the second formwork wall

6

longitudinal bars the first formwork wall

7

longitudinal bars the second formwork wall

8th

Plastic film the first formwork wall

9

Plastic film the second formwork wall

10

crossbars of the bottom part

11

limiting Longitudinal bar of the bottom part

12

jutting sections

13

boundary edge the first formwork wall

14

limiting Longitudinal bar of the bottom part

15

jutting sections

16

boundary edge the second formwork wall

17

Plastic film of the bottom part

20

crossbars of the bottom part

23

end the cross bars of the bottom part

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0075641 A1 [0003]
• - DE 202007008975 U1 [0004]
• EP 075641 A1 [0021]

Claims (15)

Permanent formwork for concrete construction with a first lateral formwork wall ( 1 ), a second lateral formwork wall ( 2 ) and a bottom part ( 3 ), the two lateral formwork walls ( 1 . 2 ) consist of a composite material, wherein the composite material at least one of transverse ( 4 . 5 ) and longitudinal bars ( 6 . 7 ) constructed metallic lattice and at least one of the grid openings covering flexible plastic film ( 8th . 9 ), wherein at least one boundary edge ( 13 ) at least the first lateral formwork wall ( 1 ) is formed by a longitudinal bar, characterized in that the bottom part ( 3 ) with at least the first lateral Schalungswandung ( 1 ), that the bottom part ( 3 ) around the boundary edge ( 13 ) of the first lateral formwork wall ( 1 ) is formed pivotable. Lost formwork according to claim 1, characterized in that at least one boundary edge ( 16 ) of the second lateral formwork wall ( 2 ) is formed by a longitudinal bar, wherein the bottom part ( 3 ) in such a way with the second lateral Schalungswandung ( 2 ), that the bottom part ( 3 ) around the boundary edge ( 16 ) of the second lateral formwork wall ( 2 ) is formed pivotable. Lost formwork according to at least one of claims 1 and 2, characterized in that the bottom part ( 3 ) from an interconnected transverse ( 10 ) and longitudinal bars ( 11 ) existing metallic latticework, wherein the boundary edges of the bottom part ( 3 ) by transverse ( 10 ) and longitudinal bars ( 11 ) are formed, wherein at least two transverse bars ( 10 ) of the bottom part ( 3 ) over at least a first limiting longitudinal bar ( 11 ) of the bottom part ( 3 ) protruding sections ( 12 ) exhibit. Permanent formwork according to claim 3, characterized in that the transverse rods ( 10 ) of the bottom part ( 3 ) in the over the first limiting longitudinal bar ( 11 ) of the bottom part ( 3 ) protruding sections ( 12 ) have a substantially U-shaped configuration, wherein the U-shaped sections ( 12 ) the boundary edge ( 13 ) of the first lateral formwork wall ( 1 ) embrace. Lost formwork according to at least one of claims 3 and 4, characterized in that all cross bars ( 10 ) of the bottom part ( 3 ) over the first limiting longitudinal bar ( 11 ) of the bottom part ( 3 ) protruding sections ( 12 ) having a substantially U-shaped configuration, wherein the U-shaped sections ( 12 ) the boundary edge ( 13 ) of the first lateral formwork wall ( 1 ) embrace. Lost formwork according to at least one of claims 3 to 5, characterized in that at least two transverse bars ( 10 ) of the bottom part ( 3 ) over both limiting longitudinal bars ( 11 . 14 ) of the bottom part ( 3 ) protruding sections ( 12 . 15 ) having a substantially U-shaped configuration, wherein the over the first limiting longitudinal bar ( 11 ) projecting U-shaped sections ( 12 ) the boundary edge ( 13 ) of the first lateral formwork wall ( 1 ) and over the second limiting longitudinal bar ( 14 ) projecting U-shaped sections ( 15 ) the boundary edge ( 16 ) of the second lateral formwork wall ( 2 ) embrace. Lost formwork according to claim 6, characterized in that all transverse bars ( 10 ) of the bottom part ( 3 ) over both limiting longitudinal bars ( 11 . 14 ) of the bottom part ( 3 ) protruding sections ( 12 . 15 ) having a substantially U-shaped configuration, wherein the over the first limiting longitudinal bar ( 11 ) projecting U-shaped sections ( 12 ) the boundary edge ( 13 ) of the first lateral formwork wall ( 1 ) and over the second limiting longitudinal bar ( 14 ) projecting U-shaped sections ( 15 ) the boundary edge ( 16 ) of the second lateral formwork wall ( 2 ) embrace. Lost formwork according to at least one of claims 3 to 7, characterized in that the bottom part ( 3 ) comprises at least one of the grid openings of the lattice work covering, flexible plastic film. Permanent formwork according to claim 2, characterized in that the bottom part ( 3 ) at least two, substantially parallel to each other extending metallic cross bars ( 20 ), wherein the transverse rods in their end sections ( 23 ) with the transverse rods ( 4 . 5 ) of the lateral formwork walls ( 1 . 2 ) and the transverse bars ( 20 ) of the bottom part ( 3 ) as well as the boundary edges ( 13 . 16 ) of the lateral formwork walls ( 1 . 2 ) enclosed area of at least one flexible plastic film ( 17 ) is covered. Lost formwork according to at least one of claims 3 to 9, characterized in that the number of transverse bars ( 20 ) of the bottom part ( 3 ) is less than the number of transverse bars ( 4 ) at least the first shuttering wall ( 1 ). Lost formwork according to at least one of claims 3 to 10, characterized in that the number of transverse bars ( 20 ) of the bottom part ( 3 ) is less than the number of transverse bars ( 5 ) of the second formwork wall ( 2 ). Lost formwork after at least one of claims 3 to 11, characterized in that at least one transverse bar ( 20 ) of the bottom part ( 3 ) has a smaller diameter than the transverse rods ( 4 ) at least the first shuttering wall ( 1 ). Permanent formwork according to claim 12, characterized in that all transverse bars ( 20 ) of the bottom part ( 3 ) have a smaller diameter than the transverse rods ( 4 ) at least the first shuttering wall ( 1 ). Lost formwork according to at least one of claims 1 to 13, characterized in that it is in the flexible plastic film ( 8th . 9 ) is a shrink film. Lost formwork according to claim 14, characterized in that it is in the flexible plastic film ( 8th . 9 ) is a polyethylene film.