DE102019131746A1 - Formwork element and formwork system - Google Patents

Abstract

A formwork element S for concrete construction is described comprising a lower formwork part 1, an upper formwork part 2, a slotted formwork part 3, a horizontal sheet metal strip 4 designed as a flat water barrier and a vertical sheet metal strip 5 designed as a flat water barrier Upper formwork part 2 and the slotted formwork part 3 are arranged in a common plane, the horizontal sheet metal strip 4 being arranged between the formwork parts 1, 2, 3 in such a way that it is oriented essentially perpendicular to the plane of the formwork parts 1, 2, 3 and a first surface 4a of the horizontal sheet metal strip faces the upper formwork part 2 and the slotted formwork part 3 and a second surface 4b of the horizontal sheet metal strip faces the lower formwork part 1 and the horizontal sheet metal material strip 4 on both sides over the level of the formwork ungsteile 1, 2, 3 protrudes. The upper formwork part 2 and the slotted formwork part 3 are firmly connected to the first surface 4a of the horizontal sheet metal material strip and the lower formwork part 1 is firmly connected to the second surface 4b of the horizontal sheet metal material strip. The vertical sheet metal strip 5 is arranged between the upper formwork part 2 and the slotted formwork part 3 in such a way that it is oriented essentially perpendicular to the plane of the formwork parts 1, 2, 3 and a first surface 5a of the vertical sheet metal material strip faces the upper formwork part 2 and a second surface 5b of the vertical sheet metal strip faces the slotted formwork part 3 and the vertical sheet metal material strip 5 protrudes on both sides beyond the plane of the formwork parts 1, 2, 3. The upper formwork part 2 is firmly connected to the first surface 5a of the vertical sheet metal material strip and the slotted formwork part 3 is fixed in the vertical direction to the second surface 5b via a sub-area TV of its extent T extending from the first surface 4a of the horizontal sheet metal material strip 4 of the vertical sheet metal material strip 5, the horizontal sheet metal material strip 4 and the vertical sheet metal material strip 5 being arranged perpendicular to one another and firmly connected to one another. A slot-like recess 6 is provided between the second surface 5b of the vertical sheet-metal material strip 5 and the slotted formwork part 3, the slot-like recess 6 extending from the edge R of the slotted formwork part 3 facing away from the first surface 4a of the horizontal sheet-metal material strip 4 over at least 3% vertical extension T of the slotted formwork part 3 extends.

Description

Technical area

The present invention relates to a formwork element and a formwork system for concrete construction.

State of the art

Concrete structures such as floor / ceiling slabs are often concreted in several sections. Reasons for this are, for example, mixing new concrete or taking a break between pouring the individual sections. This creates construction joints that have to be sealed against moisture. The shuttering elements used for this purpose are usually made of steel and have larger dimensions, which leads to a high weight and corresponding difficulties when used on the construction site.

From the EP 0 513 740 B1 a permanent formwork consisting of formwork parts, which are made up of interconnected transverse and longitudinal bars and an intermediate metal panel, and a flat water stop made of sheet metal material firmly connected to the formwork parts is known.

From the DE 20 2008 003 246 U1 a permanent formwork is known in which two formwork parts are firmly connected to one another with the aid of a connecting device, leaving a gap free. The gap between the two formwork parts is intended to accommodate a flat water stop.

The DE 20 2009 005 173 U1 also describes a permanent formwork for concrete construction with two formwork parts and a sheet metal strip designed as a flat water barrier. The two formwork parts are aligned with one another lying in one plane, the sheet metal strip being arranged between the two formwork parts and perpendicular to the plane of the formwork parts. The sheet metal strip protrudes on both sides over the level of the formwork parts. The sheet metal strip has fastening elements on both of its surfaces for fastening the formwork parts, the formwork parts being connected to the sheet metal material strip in a force-locking manner in the fastening elements.

Often the floor / ceiling slabs to be concreted do not extend in their entire extent in one plane, but rather offset in the vertical direction. In these cases, the floor / ceiling plate thus has two flat sections which, as a rule, run parallel to one another, but are arranged offset from one another in the vertical direction. The shuttering of the area in which the height offset of the floor / ceiling slab takes place and the sealing of this area against water is currently carried out with a great deal of work with the help of improvised formwork parts attached to one another at the construction site.

There is therefore a need for a formwork system by means of which vertically rebounding floor / ceiling panels can be paneled in a simple manner in the area of the projection and equipped with a water seal.

Presentation of the invention

The invention, as it is characterized in the claims, is based on the object of providing a formwork system by means of which vertically rebounding floor / ceiling panels can be paneled in a simple manner in the area of the projection and equipped with a water seal.

This object is achieved according to the invention by the formwork element according to claim 1 and the formwork system according to claim 12. Further advantageous details, aspects and configurations of the present invention emerge from the dependent claims, the description, the examples and the drawings.

The formwork element according to the invention for concrete construction comprises a lower formwork part, an upper formwork part, a slotted formwork part, a horizontal sheet metal strip designed as a flat water barrier and a vertical sheet metal strip designed as a flat water barrier. The lower formwork part, the upper formwork part and the slotted formwork part are arranged in a common plane, wherein the horizontal sheet metal strip is arranged between the formwork parts that it is aligned essentially perpendicular to the plane of the formwork parts and a first surface of the horizontal sheet metal material strip upper formwork part and the slotted formwork part faces and a second surface of the horizontal sheet metal strip faces the lower formwork part and the horizontal sheet metal material strip protrudes on both sides over the plane of the formwork parts.

The upper formwork part and the slotted formwork part are firmly connected to the first surface of the horizontal sheet metal strip and the lower formwork part is firmly connected to the second surface of the horizontal sheet metal strip. The vertical sheet metal strip is between the upper formwork part and the slotted formwork part arranged that it is aligned essentially perpendicular to the plane of the formwork parts and a first surface of the vertical sheet metal material strip faces the upper formwork part and a second surface of the vertical sheet metal material strip faces the slotted formwork part and the vertical sheet metal material strip on both sides over the plane of the Formwork parts protrudes. The upper formwork part is firmly connected to the first surface of the vertical sheet metal material strip and the slotted formwork part is firmly connected to the second surface of the vertical sheet metal material strip in the vertical direction via a portion of its extent extending from the first surface of the horizontal sheet metal material strip, the horizontal Sheet metal material strips and the vertical sheet metal material strips are arranged perpendicular to one another and are firmly connected to one another.

A slot-like recess is provided between the second surface of the vertical sheet metal strip and the slotted formwork part, the slot-like recess extending from the edge of the slotted formwork part facing away from the first surface of the horizontal sheet metal material strip over at least 3% of the vertical extent of the slotted formwork part.

The particular advantages of the formwork element according to the invention for concrete construction come into play when two of these formwork elements are combined in one formwork system for concrete construction. Such a formwork system for concrete construction comprises at least one first formwork element according to the present invention and at least one second formwork element according to the present invention, the first formwork element and the second formwork element being arranged in relation to one another so that the vertical sheet metal strip of the first formwork element enters the slot-like recess of the engages the second formwork element and the vertical sheet metal strip of the second formwork element engages in the slot-like recess of the first formwork element. In this arrangement, the second surface of the vertical sheet metal strip of the first formwork element is then in contact with the second surface of the vertical sheet metal material strip of the second formwork element.

Such a formwork system made up of two formwork elements according to the invention creates the possibility of encasing a vertically rebounding floor / ceiling panel in the region of the projection and equipping it with a water seal in a very simple way. The cladding is done by two prefabricated standard elements delivered to the construction site, which only have to be plugged into each other in the manner described in order to get to a formwork that clad a vertically protruding floor / ceiling plate and equips it with a water barrier.

The formwork system can be adapted to any conceivable installation situation thanks to the different dimensions of the vertical sheet metal strips and the various formwork parts. Both the horizontal extension of the floor / ceiling plate and the height of the vertical offset can be simulated in a simple manner. The prefabricated formwork elements only need to be manufactured according to the previously known dimensions of the floor / ceiling slab.

It is known to the person skilled in the art that the shuttering parts of a shuttering element arranged on the two sides of a water barrier are usually arranged in a common plane. An offset of the shuttering parts arranged on different sides of, for example, a seam sheet relative to one another does not bring any technical advantages, but the water barrier would have to be dimensioned wider accordingly so that it protrudes over the shuttering parts on both sides by the required amount. If, in the context of the present text, it is pointed out in the general description and in the exemplary embodiments that the lower formwork part, the upper formwork part and the slotted formwork part are arranged in a common plane, then the technical requirements mentioned are owed. An insignificant offset of the formwork parts of a formwork element relative to one another is of course covered by the present invention.

The height T of the slotted formwork part can vary over a wide range. Starting with an extension of a few 10 cm for concreting smaller steps up to an extension of 3 m or even 5 m for concreting entire building floors. The slot-like recess, which, as will be explained in more detail below, defines the overlapping area of two strips of sheet metal material designed as a water barrier, should extend over at least 100 mm in the vertical direction. In the case of formwork parts with a height T of several meters, it is therefore completely sufficient if the slot-like recess, as defined according to the invention, extends over at least 3% of the vertical extent of the slotted formwork part.

The formwork parts are preferably welded to the sheet metal strip. Since the formwork elements and the formwork system formed from these formwork elements must have sufficient stability to on the one hand To be able to be installed on the construction site without any problems and, on the other hand, to be able to withstand the concrete pressure after the in-situ concrete has been poured into the formwork, formwork parts and strips of sheet metal must be firmly and permanently connected to one another. Welding the individual parts is particularly suitable for ensuring a stable connection.

It is particularly expedient if the formwork parts comprise a lattice mat comprising transverse and longitudinal bars and a perforated metal sheet welded in between the transverse and longitudinal bars of the lattice mat. The perforated metal sheet is particularly preferably an expanded metal sheet or a perforated sheet.

The cross bars of the metal grid are preferably welded to the longitudinal bars of the metal grid at their crossing points. The transverse and longitudinal bars of the metal grid are also welded to the perforated metal sheet. The openings are advantageously chosen large enough on the one hand to ensure a durable and stable connection of the concrete of the two adjacent concreting sections through the concrete slurry passing through, but on the other hand not so large that the concrete of the first concreting section can flow through the openings.

Depending on the type of use of the formwork elements, the thickness of the transverse and longitudinal bars of the metal grid and the distance between the transverse and longitudinal bars can be optimized. The higher the concrete pressure to be expected on the formwork element, the thicker the individual bars must be dimensioned or the smaller the spacing between the transverse and longitudinal bars of the metal grid.

According to a particularly preferred embodiment of the present invention, at least one strip of sheet metal material is provided with a sealing coating on its first and / or second surface at least partially, preferably over the entire area. The at least partial, preferably all-over, coating achieves a particularly good seal against water. Another advantage is associated in particular with the coating of the vertical strips of sheet metal. As already described, a formwork system according to the present invention has at least a first and at least a second of the formwork elements described above. The first formwork element and the second formwork element are arranged in such a way that the vertical sheet metal strip of the first formwork element engages the slot-like recess of the second formwork element and the vertical sheet metal strip of the second formwork element engages the slot-like recess of the first formwork element. In this arrangement, the second surface of the vertical sheet metal strip of the first formwork element is then in contact with the second surface of the vertical sheet metal material strip of the second formwork element. If the two vertical strips of sheet metal are now at least partially, preferably all over, equipped with a sealing coating which always has a certain stickiness, the two vertical strips of sheet metal are firmly connected to one another after their surfaces have been brought into contact, namely firmly glued to one another. This gives the entire formwork system additional stability when it is set up. In addition, when vertical strips of sheet metal are glued together, the formwork system provides additional security against circulating water.

The sealing coating can in principle be applied to the sheet metal strip in any manner known to the person skilled in the art. The sealing coating preferably has an adhesive layer for attachment to the sheet metal strip. Before it is applied to the sheet metal strip, the adhesive layer of the coating is usually covered with a paper strip. For attachment, the paper strip can then simply be peeled off the coating and the adhesive layer can be pressed onto the sheet metal strip. A durable connection between the coating and the sheet metal strip is created in a simple manner.

The coatings described in more detail below are usually materials that can be melted at higher temperatures without decomposition. Spraying the liquid coating material onto the sheet metal strip can therefore be used as a further preferred type of application of the coating to the sheet metal strip. The coating material is sprayed onto the sheet metal strip with the aid of a spray nozzle, where it cools down and results in a solid sealing coating.

Regardless of the type of application of the coating to the sheet metal strip, the coating is provided with a protective coating until it is used as part of a water barrier. The materials used as the sealing coating give the coating in any case a sticky surface that bonds well with the poured concrete in a known manner. To protect these sticky surfaces, a layer of paper or a plastic film is usually used, which is then peeled off the coating before the concrete is poured.

As is customary and known to those skilled in the art, when the formwork elements according to the invention and the formwork system according to the invention are used in concrete parts exposed to water, the sealing coating ensures that the joint is sealed against water. For this purpose, it is particularly advantageous if the surfaces of the coatings bond well with the concrete on both sides of the joint. According to a particularly preferred embodiment of the present invention, the coating therefore has a sticky surface that bonds permanently to the adjacent concrete. If the expected shrinkage of the concrete occurs during hardening, the sealing coating on both sides of the formwork is pulled along by the concrete, with the thickness of the coating increasing. In this way, the sealing coating ensures that the joint is reliably sealed against water.

In principle, any type of coating which has the properties mentioned can be used as a sealing coating in the context of the present invention. Coatings that essentially consist of butyl rubber, bentonite, bitumen rubber, a hot melt adhesive or a swellable plastic are particularly suitable. “Swellable plastic” is understood to mean all conventional thermoplastic elastomers equipped with a swellable material. Swellable plastics can be obtained on the market in film form or in the form of tapes.

Butyl rubber is polyisobutylene that has been modified with resins and fillers (e.g. calcium carbonate). Bitumen rubber is a product made from petroleum, the exact composition of which varies. Bentonite is a swellable mixture of different clay minerals. The main component is montmorillonite (60 - 80%), accompanying minerals are quartz, mica, feldspar, pyrite or calcite.

The thickness of the coating is chosen so that, on the one hand, the coating adheres to the hardening concrete even if the concrete shrinks, but on the other hand, no superfluous coating material is applied to the lost formwork. The sealing coating preferably has a thickness between 0.1 mm and 5 mm, particularly preferably between 0.15 mm and 3 mm, in particular a thickness between 0.2 mm and 2 mm and particularly preferably a thickness between 0.5 mm and 1, 5 mm. A thickness of the sealing coating of around 1 mm has proven to be particularly advantageous.

The coating materials mentioned in the coating thicknesses mentioned can increase their volume by at least 50% and up to 100% under tensile loading. This ensures a good seal of the joint even if the concrete shrinks.

According to a preferred embodiment of the present invention, the slot-like recess extends, starting from the edge of the slotted formwork part facing away from the first surface of the horizontal sheet metal strip, over at least 10% of the vertical extent of the slotted formwork part, particularly preferably over at least 25%, particularly preferably over at least 50% , very particularly preferably over at least 70% and in particular over at least 90% of the vertical extent of the slotted formwork part.

Particularly preferably, the slot-like recess extends, starting from the edge of the slotted formwork part facing away from the first surface of the horizontal sheet metal strip, over a maximum of 95% of the vertical extent of the slotted formwork part, particularly preferably over a maximum of 80%, particularly preferably over a maximum of 50%, very particularly preferably over a maximum of 30% of the vertical extension of the slotted formwork part.

It should be mentioned explicitly that the present invention also includes all sensible combinations of the mentioned minimum and maximum values of the extent of the slot-like recess. Particularly preferably, the slot-like recess extends starting from the edge of the slotted formwork part facing away from the first surface of the horizontal sheet metal strip, for example over at least 10% and a maximum of 95% of the vertical extent of the slotted formwork part or over at least 25% and a maximum of 80% of the vertical Expansion of the slotted formwork part or over at least 70% and a maximum of 95% of the vertical extent of the slotted formwork part. As said, all combinations of the mentioned minimum and maximum values of the extent of the slot-like recess that are sensible for the person skilled in the art are covered by the present invention.

By dimensioning the slot-like recess, it must be ensured on the one hand that the vertical sheet metal strip of the first formwork element can engage sufficiently far into the slot-like recess of the second formwork element and that the vertical sheet metal material strip of the second formwork element can engage sufficiently far into the slot-like recess of the first formwork element. A sufficient overlap of the two vertical sheet metal strips ensured in this way is necessary in order to reliably seal the vertical section of the floor / ceiling plate in the area of your To ensure misalignment. On the other hand, the slot-like recess should not extend completely to the horizontal strip of sheet metal material, since then it would not be possible to fasten the vertical strip of sheet metal material to the slotted formwork part. In particular with regard to the stability of the entire formwork part, however, it has proven to be advantageous if this fastening area extends as far as possible from the vertical sheet metal material strip and the slotted formwork part.

The dimensioning of the slot-like recess represents a compromise between the stability of the formwork element and the quality of the seal against pressing water.

A slot-like recess is preferably provided between the first surface of the horizontal sheet metal strip and the slotted formwork part, the slot-like recess extending from the edge of the slotted formwork part facing away from the second surface of the vertical sheet metal material strip over a maximum of 50% of the horizontal extent of the slotted formwork part. Through such a slot-like recess, further standardized formwork elements can be connected in a particularly simple and advantageous manner, whereby the formwork of the base / cover plate can be continued without interruption and continuously tight over its entire extent.

A slot-like recess is also preferably provided between the first surface of the horizontal sheet metal strip and the upper formwork part, the slot-like recess extending from the edge of the upper formwork part facing away from the first surface of the vertical sheet metal material strip over a maximum of 50% of the horizontal extent of the upper formwork part. This embodiment ensures the continuation of the shuttering of the base / cover plate, already described above, also in a second direction, depending on the specific installation situation.

It is obvious to a person skilled in the art that the two mentioned embodiments with a slot-like recess extending from an edge of the upper formwork part facing away from a surface of the vertical sheet metal strip provide a connection for standardized formwork elements both for the formwork of the vertical direction relative to the offset at a lower level located portion of the floor / ceiling plate as well as for the shuttering of the portion of the floor / ceiling plate located in the vertical direction relative to the offset at a higher level is possible. The part of the floor / ceiling panel to be shuttered is only determined by whether the respective shuttering element is used as the first or the second shuttering element of a shuttering system according to the invention.

According to a preferred embodiment, the formwork system for concrete construction according to the present invention not only has at least one first formwork element according to the present invention and at least one second formwork element formwork element according to the present invention, but at least one connection formwork element is additionally provided, the connection formwork element being a lower one Has connection formwork part, an upper connection formwork part and a horizontal sheet metal strip formed as a flat water barrier. The lower connection formwork part and the upper connection formwork part are arranged in a common plane, the horizontal sheet metal strip being arranged between the connection formwork parts in such a way that it is aligned essentially perpendicular to the plane of the connection formwork parts and a first surface of the horizontal sheet metal material strip faces the upper connection formwork part and a second surface of the horizontal sheet-metal material strip faces the lower connecting formwork part and the horizontal sheet-metal material strip projects beyond the plane of the connecting formwork parts on both sides. The upper connection formwork part is firmly connected to the first surface of the horizontal sheet metal strip and the lower connection formwork part is firmly connected to the second surface of the horizontal sheet metal material strip.

At least one slot-like recess is provided between the first surface of the horizontal sheet metal strip and the upper connection formwork part, the slot-like recess extending from a vertically oriented edge of the upper connection formwork part over a maximum of 10% of the horizontal extent of the upper connection formwork part. The at least one first formwork element has a slot-like recess between the first surface of the horizontal sheet metal strip and the slotted formwork part or the upper formwork part, the slot-like recess extending from the edge of the slotted formwork part or the upper formwork part facing away from a surface of the vertical sheet metal material strip over a maximum of 50% of the horizontal extent of the slotted formwork part of the upper formwork part extends. The first formwork element and the connection formwork element are arranged with respect to one another in such a way that the horizontal sheet metal strip of the first formwork element engages in the slot-like recess of the connection formwork element and the horizontal one Sheet metal strip of the connecting formwork element engages in the slot-like recess of the first formwork element, a surface of the horizontal sheet metal material strip of the first formwork element being in contact with a surface of the horizontal sheet metal material strip of the second formwork element.

By using one or more additional connection formwork elements, it is very easy to enlarge the formwork system by connecting standardized formwork elements both for the formwork of the section of the floor / ceiling plate located in the vertical direction relative to the offset at a lower level as well as for the formwork of the is possible in the vertical direction relative to the offset at a higher level section of the floor / ceiling plate.

It is particularly expedient with regard to the stability of the formwork elements if the individual formwork parts have a transverse or longitudinal bar of the lattice mat preferably used as part of the formwork parts in the area of their boundary edges.

Figure list

• 1 eine perspektivische Ansicht eines erfindungsgemäßen Schalungselements;
• 2 eine perspektivische Ansicht eines erfindungsgemäßen Schalungssystems, das sich aus zwei Schalungselementen gemäß 1 zusammensetzt;
• 3 eine seitliche Ansicht einer weiteren Ausführungsform eines erfindungsgemäßen Schalungselements;
• 4 eine seitliche Ansicht eines Anschlussschalungselements;
• 5 eine seitliche Ansicht der Ausführungsform gemäß 3 und eines Anschlussschalungselements gemäß 4;
• 6 eine seitliche Ansicht einer Kombination von zwei in der 5 dargestellten Schalungssystemen.

The invention is to be explained in more detail below on the basis of exemplary embodiments in connection with the drawings. However, it is expressly pointed out that the invention is not intended to be restricted to the examples given. Show it

• 1 a perspective view of a formwork element according to the invention;
• 2 a perspective view of a formwork system according to the invention, which consists of two formwork elements according to 1 composed;
• 3rd a side view of a further embodiment of a formwork element according to the invention;
• 4th a side view of a connection formwork element;
• 5 a side view of the embodiment according to 3rd and a connection formwork element according to 4th ;
• 6th a side view of a combination of two in the 5 formwork systems shown.

Ways of Carrying Out the Invention

1 shows a formwork element S. for concrete construction including a lower formwork part 1 , an upper formwork part 2 , a slotted formwork part 3rd , a horizontal sheet metal strip designed as a flat water barrier 4th and a vertical sheet metal strip designed as a flat water barrier 5 .

The formwork parts 1 , 2 , 3rd consist of a lattice mat comprising transverse and longitudinal bars and an expanded metal sheet welded between the transverse and longitudinal bars of the lattice mat.

The lower formwork part 1 , the upper part of the formwork 2 and the slotted formwork part 3rd are arranged in a common plane, with the horizontal sheet metal strip 4th so between the formwork parts 1 , 2 , 3rd is arranged that it is substantially perpendicular to the plane of the formwork parts 1 , 2 , 3rd is aligned and thereby a first surface 4a of the horizontal sheet metal strip to the upper part of the formwork 2 and the slotted formwork part 3rd facing and a second surface 4b of the horizontal sheet metal strip to the lower formwork part 1 is facing.

The horizontal sheet metal strip 4th protrudes on both sides over the level of the formwork parts 1 , 2 , 3rd out. The upper part of the formwork 2 and the slotted formwork part 3rd are with the first surface 4a of the horizontal sheet metal strip welded and the lower formwork part 1 is with the second surface 4b of the horizontal sheet metal strip welded.

The vertical sheet metal strip 5 is so between the upper part of the formwork 2 and the slotted formwork part 3rd arranged so that it is substantially perpendicular to the plane of the formwork parts 1 , 2 , 3rd is aligned and thereby a first surface 5a of the vertical sheet metal strip to the upper part of the formwork 2 facing and a second surface 5b of the vertical sheet metal strip to the slotted formwork part 3rd is facing.

The vertical sheet metal strip 5 protrudes on both sides over the level of the formwork parts 1 , 2 , 3rd out. The upper part of the formwork 2 is with the first surface 5a of the vertical sheet metal strip welded and the slotted formwork part 3rd is about one, starting from the first surface 4a of the horizontal sheet metal strip 4th extending sub-area TV its expansion T in the vertical direction with the second surface 5b of the vertical sheet metal strip 5 welded. The horizontal sheet metal strip 4th and the vertical strip of sheet metal 5 are arranged perpendicular to each other and firmly welded together.

Between the second surface 5b of the vertical sheet metal strip 5 and the slotted formwork part 3rd is a slot-like recess 6th provided, the slot-like recess 6th starting from that of the first surface 4a of the horizontal sheet metal strip 4th remote edge R. of the slotted formwork part 3rd over around 80% of the vertical extent T of the slotted formwork part 3rd extends.

2 shows a formwork system for concrete construction, which is composed of two of the formwork elements described above. The formwork system comprises a first formwork element S1 and a second formwork element S2 , wherein the first formwork element S1 and the second formwork element S2 are arranged to each other so that the vertical sheet metal strip 51 of the first formwork element S1 into the slot-like recess S62 of the second formwork element S2 engages and the vertical sheet metal strip 52 of the second formwork element S2 into the slot-like recess S61 of the first formwork element S1 intervenes. The second surface 51b of the vertical sheet metal strip 51 of the first formwork element S1 stands with the second surface 52b of the vertical sheet metal strip 52 of the second formwork element S2 in contact.

That in the 2 The formwork system shown is composed of two identical formwork elements as described above. The dimensions of all formwork parts and sheet metal strips are for both formwork elements S1 , S2 equal. The cladding is carried out using two prefabricated standard elements that are delivered to the construction site and only need to be plugged into one another to get to a formwork that clad a vertically protruding floor / ceiling panel and equips it with a water barrier. Due to a different dimensioning of the vertical sheet metal strips 51 , 52 and the various formwork parts of the two formwork elements S1 , S2 the formwork system can be adapted to any conceivable installation situation. Both the horizontal extension of the floor / ceiling plate and the height of the vertical offset can be simulated in a simple manner. The prefabricated formwork elements S1 , S2 only need to be manufactured according to the previously known dimensions of the floor / ceiling plate.

Both the in 1 Shuttering element shown as well as the one in 2 The formwork system shown is fully equipped with a sealing coating (not shown) made of butyl rubber on the surfaces of its sheet metal strips. There are also the two vertical strips of sheet metal 51 , 52 are fully equipped with a sealing coating, which has a certain stickiness, are the two vertical strips of sheet metal 51 , 52 firmly glued together after their surfaces have been brought into contact. This gives the entire formwork system additional stability when it is being set up. In addition, the formwork system has vertical sheet metal strips that are glued together 51 , 52 an additional security against circulating water.

3rd shows a side view of a further embodiment of a formwork element according to the invention S1A . Between the first surface 4a of the horizontal sheet metal strip 4th and the slotted formwork part 3rd is a slot-like recess 61 provided, the slot-like recess 61 starting from that of the second surface 5b of the vertical sheet metal strip 5 remote edge Rb of the slotted formwork part 3rd over around 25% of the horizontal extent TG of the slotted formwork part 3rd extends.

Next to it is between the first surface 4a of the horizontal sheet metal strip 4th and the upper part of the formwork 2 a slot-like recess 62 provided, the slot-like recess 62 starting from that of the first surface 5a of the vertical sheet metal strip 5 remote edge Ra of the upper part of the formwork 2 over around 25% of the horizontal extent TO of the upper part of the formwork 2 extends.

Through the slot-like recesses 61 , 62 Further standardized formwork elements can be connected in a particularly simple and advantageous manner, whereby the formwork of the bottom / cover plate can be continued without interruption and continuously tightly in both directions over its entire extent, depending on the specific installation situation.

Such a standardized formwork element, with the help of which the formwork of the bottom / cover plate can be continued, is in the 4th shown. The connecting formwork element S3 has a lower connection formwork part S31 , an upper connecting formwork part S32 and a horizontal sheet metal strip designed as a flat water barrier S34 on.

The connecting formwork parts S31 , S32 consist of a lattice mat comprising transverse and longitudinal bars and an expanded metal sheet welded between the transverse and longitudinal bars of the lattice mat.

The lower connecting formwork part S31 and the upper connecting formwork part S32 are arranged in a common plane. The horizontal sheet metal strip S34 is like this between the connecting formwork parts S31 , S32 arranged that it is substantially perpendicular to the plane of the connecting formwork parts S31 , S32 is aligned and thereby a first surface S34a of the horizontal sheet metal strip to the upper connecting formwork part S32 facing and a second surface S34b of the horizontal sheet metal strip to the lower connecting formwork part S31 is facing. The horizontal sheet metal strip S34 protrudes on both sides over the level of the connecting formwork parts S31 , S32 out.

The upper connecting formwork part S32 is with the first surface S34a of the horizontal sheet metal strip welded and the lower connecting formwork part S31 is with the second surface S34b of the horizontal sheet metal strip welded.

Between the first surface S34a of the horizontal sheet metal strip and the upper connecting formwork part S32 are two slot-like recesses S36 , S37 provided, the slot-like recess S36 starting from a vertically oriented edge S3R of the upper connecting formwork part S32 over around 15% of the horizontal extension S3T of the upper connecting formwork part S32 extends, and the slot-like recess S37 starting from a vertically oriented edge S3A of the upper connecting formwork part S32 over around 15% of the horizontal extension S3T of the upper connecting formwork part S32 extends.

As in 5 can be shown in the 3rd Shuttering element shown S1A and that in 4th Connection formwork element shown S3 are moved towards each other in the direction of the two arrows that the horizontal sheet metal strip 4th of the formwork element S1A into the slot-like recess S36 of the connecting formwork element S3 engages and the horizontal sheet metal strip S34 of the connecting formwork element S3 into the slot-like recess 61 of the formwork element S1A intervenes.

This creates a surface of the horizontal strip of sheet metal 4th of the formwork element S1A with one surface of the horizontal sheet metal strip S34 of the connecting formwork element S3 in contact. Since the sheet metal strips are in turn provided with a corresponding coating, the formwork element S1A and the connecting formwork element S3 firmly glued together. This gives the entire formwork system additional stability. In addition, the formwork system has horizontal sheet metal strips that are glued together 4th , S34 an additional security against circulating water.

By using several additional connection formwork elements S3 is an enlargement of the formwork system in a very simple way by connecting standardized formwork elements both for the shuttering of the section of the floor / ceiling plate located in the vertical direction relative to the offset at a lower level as well as for the shuttering of the section of the floor / ceiling plate located in the vertical direction relative to the offset at a higher level Level section of the floor / ceiling plate possible. As in 6th The formwork system can be shown both at the lower level of the formwork element S1A as well as on the higher level of the formwork element in the vertical direction relative to the offset S2A by connecting connecting formwork elements S3 can be continued in the horizontal direction.

List of reference symbols

1

lower formwork part

2

upper formwork part

3

slotted formwork part

4th

horizontal sheet metal strip

4a, 4b

first and second surfaces of the horizontal sheet metal strip 4

5

vertical sheet metal strip

5a, 5b

first and second surfaces of the vertical strip of sheet metal 5

51

vertical sheet metal strip

51b

second surface of vertical sheet metal strip 51

52

vertical sheet metal strip

52b

second surface of vertical sheet metal strip 52

6, 61, 62

slot-like recess

S36, S37

slot-like recess

S61, S62

slot-like recess

S, S1A, S2A

Formwork element

S1

first formwork element

S2

second formwork element

S3

Connection formwork element

S31

lower connection formwork part

S32

upper connecting formwork part

S34

horizontal sheet metal strip

S34a

the first surface of the horizontal sheet metal strip S34 facing the upper connection formwork part

S34b

the second surface of the horizontal sheet metal material strip S34 facing the lower connection formwork part

T

Expansion of the slotted formwork part in the vertical direction

TG

horizontal expansion of the slotted formwork part

TV

Part of the expansion of the slotted formwork part in the vertical direction

TO

horizontal expansion of the upper part of the formwork

R.

the edge of the slotted formwork part facing away from the first surface of the horizontal sheet metal strip

Ra

the edge of the upper formwork part facing away from the first surface of the vertical sheet metal strip

S3R, S3A

vertically oriented edge of the upper connecting formwork part

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

• EP 0513740 B1 [0003]
• DE 202008003246 U1 [0004]
• DE 202009005173 U1 [0005]

Claims (13)

Formwork element (S) for concrete construction, comprising a lower formwork part (1), an upper formwork part (2), a slotted formwork part (3), a horizontal sheet metal strip (4) designed as a flat water barrier and a vertical sheet metal strip designed as a flat water barrier (5), wherein the lower formwork part (1), the upper formwork part (2) and the slotted formwork part (3) are arranged in a common plane, wherein the horizontal sheet metal strip (4) is arranged between the formwork parts (1, 2, 3) that it is aligned essentially perpendicular to the plane of the formwork parts (1, 2, 3) and thereby a first surface (4a) of the horizontal Sheet metal strip facing the upper formwork part (2) and the slotted formwork part (3) and a second surface (4b) of the horizontal sheet metal material strip faces the lower formwork part (1) and the horizontal sheet metal material strip (4) on both sides over the plane of the formwork parts (1, 2, 3) protrudes, wherein the upper formwork part (2) and the slotted formwork part (3) are firmly connected to the first surface (4a) of the horizontal sheet metal material strip and the lower formwork part (1) is firmly connected to the second surface (4b) of the horizontal sheet metal material strip, wherein the vertical sheet metal strip (5) is arranged between the upper formwork part (2) and the slotted formwork part (3) that it is oriented essentially perpendicular to the plane of the formwork parts (1, 2, 3) and thereby has a first surface ( 5a) of the vertical sheet metal strip faces the upper formwork part (2) and a second surface (5b) of the vertical sheet metal material strip faces the slotted formwork part (3) and the vertical sheet metal material strip (5) on both sides over the plane of the formwork parts (1, 2, 3) ) protrudes, wherein the upper formwork part (2) is firmly connected to the first surface (5a) of the vertical sheet metal strip and the slotted formwork part (3) over a, starting from the first surface (4a) of the horizontal sheet metal material strip (4) extending portion (TV) its extension (T) in the vertical direction is firmly connected to the second surface (5b) of the vertical sheet metal strip (5), wherein the horizontal sheet metal strip (4) and the vertical sheet metal strip (5) are arranged perpendicular to one another and are firmly connected to one another, wherein a slot-like recess (6) is provided between the second surface (5b) of the vertical sheet metal strip (5) and the slotted formwork part (3), the slot-like recess (6) starting from that of the first surface (4a) of the horizontal sheet metal strip (4) facing away from the edge (R) of the slotted formwork part (3) extends over at least 3% of the vertical extent (T) of the slotted formwork part (3). Formwork element (S) after Claim 1 , characterized in that the formwork parts (1, 2, 3) are welded to the sheet metal strips (4, 5). Formwork element (S) according to one of the Claims 1 and 2 , characterized in that the shuttering parts (1, 2, 3) each comprise a cross and longitudinal bars comprising a grid mat and in each case a perforated metal sheet welded between the cross and longitudinal bars of the grid mat. Formwork element (S) after Claim 3 , characterized in that the perforated metal sheet is an expanded metal or a perforated sheet. Formwork element (S) according to one of the Claims 1 to 4th , characterized in that at least one sheet metal strip (4, 5) is provided on its first and / or second surface at least partially, preferably over the entire area, with a sealing coating. Formwork element (S) according to one of the Claims 1 to 5 , characterized in that the sealing coating has an adhesive layer for attachment to the sheet metal strip (4, 5). Formwork element (S) according to one of the Claims 1 to 6th , characterized in that the sealing coating consists of butyl rubber, bentonite, bitumen rubber, a hot melt adhesive or a mixture of these materials. Formwork element (S) according to one of the Claims 1 to 7th , characterized in that the sealing coating has a thickness between 0.1 mm and 5 mm, preferably a thickness between 0.15 mm and 3 mm, particularly preferably a thickness between 0.2 mm and 2 mm, particularly preferably a thickness between 0 , 5 mm and 1.5 mm, very particularly preferably a thickness of around 1 mm. Formwork element (S) according to one of the Claims 1 to 8th , characterized in that the slot-like recess (6) extends from the edge (R) of the slotted formwork part (3) facing away from the first surface (4a) of the horizontal sheet metal strip (4) over at least 10% of the vertical extent (T) of the slotted formwork part (3) extends, preferably over at least 25%, particularly preferably over at least 50%. Formwork element (S1A) according to one of the Claims 1 to 9 , characterized in that a slot-like recess (61) is provided between the first surface (4a) of the horizontal sheet metal strip (4) and the slotted formwork part (3), the slot-like recess (61) starting from that of the second surface (5b ) of the vertical sheet metal strip (5) facing away from the edge (Rb) of the slotted formwork part (3) extends over a maximum of 50% of the horizontal extent (TG) of the slotted formwork part (3). Formwork element (S1A) according to one of the Claims 1 to 10 , characterized in that a slot-like recess (62) is provided between the first surface (4a) of the horizontal sheet metal strip (4) and the upper formwork part (2), the slot-like recess (62) starting from that of the first surface (5a ) of the vertical sheet metal strip (5) facing away from the edge (Ra) of the upper formwork part (2) extends over a maximum of 50% of the horizontal extent (TO) of the upper formwork part (2). Formwork system for concrete construction comprising at least one first formwork element (S1) according to one of the Claims 1 to 11 and at least one second formwork element (S2) according to one of the Claims 1 to 11 , characterized in that the first formwork element (S1) and the second formwork element (S2) are arranged to each other that the vertical sheet metal strip (51) of the first formwork element (S1) engages in the slot-like recess (62) of the second formwork element (S2) and the vertical sheet metal strip (52) of the second formwork element (S2) engages in the slot-like recess (61) of the first formwork element (S1), wherein the second surface (51b) of the vertical sheet metal material strip (51) of the first formwork element (S1) with the second Surface (52b) of the vertical sheet metal strip (52) of the second formwork element (S2) is in contact. Formwork system according to Claim 12 , characterized in that at least one connection formwork element (S3) is provided, the connection formwork element (S3) having a lower connection formwork part (S31), an upper connection formwork part (S32) and a horizontal sheet metal strip (S34) designed as a flat water barrier, the lower Connection formwork part (S31) and the upper connection formwork part (S32) are arranged in a common plane, the horizontal sheet metal strip (S34) being arranged between the connection formwork parts (S31, S32) in such a way that it is essentially perpendicular to the plane of the connection formwork parts (S31, S32) is aligned with a first surface (S34a) of the horizontal sheet metal strip facing the upper connection formwork part (S32) and a second surface (S34b) of the horizontal sheet metal material strip facing the lower connection formwork part (S31) and the horizontal sheet metal material strip (S34) on both sides di e level of the connection formwork parts (S31, S32) protrudes, the upper connection formwork part (S32) being firmly connected to the first surface (S34a) of the horizontal sheet metal strip and the lower connection formwork part (S31) firmly connected to the second surface (S34b) of the horizontal sheet metal material strip is, with at least one slot-like recess (S36) being provided between the first surface (S34a) of the horizontal sheet metal strip and the upper connecting formwork part (S32), the slot-like recess (S36) starting from a vertically oriented edge (S3R) of the upper connecting formwork part (S32) extends over a maximum of 10% of the horizontal extent (S3T) of the upper connecting formwork part (S32), the at least one first formwork element (S1A) between the first surface (4a) of the horizontal sheet metal strip (4) and the slotted formwork part (3) or the upper formwork part (2) a slot-like recess g (61, 62), the slot-like recess (61, 62) starting from the edge (Ra, Rb) of the slotted formwork part (3) or the upper edge (Ra, Rb) facing away from a surface (5a, 5b) of the vertical sheet metal strip (5) Formwork part (2) extends over a maximum of 50% of the horizontal extent (TG, TO) of the slotted formwork part (3) or the upper formwork part (2), the first formwork element (S1A) and the connecting formwork element (S3) being arranged to one another in such a way that the horizontal sheet metal strip (4) of the first formwork element (S1A) engages in the slot-like recess (S36) of the connecting formwork element (S3) and the horizontal sheet metal strip (S34) of the connecting formwork element (S3) engages in the slot-like recess (61) of the first formwork element (S1A) engages, wherein a surface of the horizontal sheet metal strip (4) of the first formwork element (S1A) with a surface of the horizontal sheet metal strip (S34) d the connecting formwork element (S3) is in contact.

Images