EP2183445A1 - Ceiling formwork having supporting means for formwork panels - Google Patents

Abstract

The invention relates to a ceiling formwork (1) having formwork panels (2) comprising rectangular edge webs (3) horizontally disposed in the usage position, and supporting means, such as carriers (15) and/or supports (17) for said formwork panels (2), and a holding element (4) gripping the edge webs (3) of adjacent formwork panes (2) in the corner region, said element comprising centering protrusions (5) for the edge webs (3) of said formwork panels (2) and intersecting openings (6) that are open toward the top, extending horizontally between the centering protrusions (5) in the usage position, which are limited by lateral centering surfaces (7) of the centering protrusions (5). These lateral limitations or centering surfaces (7) of the openings (6) approximate each other from the top to the bottom at least up to a distance from each other that corresponds to the total thickness of two edge webs (3) of two formwork panels (2) in contact with each other in the usage position, wherein a groove-like intermediate space (12) may be provided beneath this closest approximation of the centering surfaces (7) as a continuation of the centering surfaces (7) in order to positively encompass the edges of the edge webs (3) of the formwork panels (2).

Description

 Slab formwork with support means for formwork panels

The invention relates to a slab formwork with horizontally arranged in the use position, rectangular, edge webs having formwork panels and with support means for these formwork panels and with a contacting in the use position edge webs of adjacent formwork panels in a corner of the formwork panels detecting holding element.

Slab formwork is known in many forms.

For example, from DE 42 11 200 C2 a slab formwork is known, in which a holding element is provided to detect the four corners of four colliding in these four corners formwork panels simultaneously. In this case, undercuts are arranged in a longitudinal direction, which are taken up by specially shaped webs of the formwork panels in the position of use, which requires very special formwork panels.

The use of formwork panels, for example, according to DE 20 2007 002 502 or according to EP 0 573 450 B1 would thus not be possible.

It is therefore an object to provide a slab formwork of the type mentioned, in which formwork panels with relatively simple edge bars, in particular commercially available formwork panels can be used without undercuts are required.

To solve this problem, the ceiling defined above is Formwork characterized in that the holding element has centering projections for the edge webs of the formwork panels and between the centering in the use position horizontally extending, intersecting, upwardly open passage openings are provided which are bounded by lateral centering surfaces of the centering, and that the lateral boundaries or centering surfaces of the through holes from top to bottom approach each other at least to a mutual distance corresponding to the total thickness of two in the position of use touching edge webs of two formwork panels.

Thus, the holding element can grip and connect the four corners of four panels without the need for undercutting. The formwork panels can be easily placed from above with their corner regions on the support member, each detected a centering formed by two edge webs edge of a formwork panel and engages in this corner, as each two in the corner in use position abutting edge webs fit between the centering , Since the centering projections have corresponding centering surfaces, the formwork panels are automatically positioned correctly by the assembly, since the abutting formwork panels center each other as they fall into the position of use on the holding element by the centering surfaces and their distance and position. In this case, the respective outer sides of the edge webs, for example, four formwork panels automatically come to mutual contact, between them an approximately scarf-shaped parting line is formed, but so narrow that virtually no concrete can penetrate.

It is expedient here if the centering projections are arranged on a plate which supports the horizontal through-holes. Openings closes down and serves as a support for the formwork facing away from the edges of the edge webs of the formwork panels in the use position. Although the upper end faces of the centering projections could also support the formwork panels on the underside of the formwork skin, this might not result in a sufficiently stable power transmission. By said measure, to use the centering projections having plate for supporting the edge webs, there is a good introduction of the forces occurring during concreting. Of course, the centering projections are only dimensioned so high that they do not or hardly touch the outside of the formwork skin.

A particularly advantageous embodiment of the invention can provide that the centering of the centering projections at the location of their closest approach in vertical boundaries of groove-like spaces between the centering pass over whose inside width of the thickness of two adjacent edge webs corresponds, wherein the groove-like spaces in the lower use position form the passage openings. In this way, the formwork edge edges can be positively embraced over a certain width of the through holes and thus be set even better. Especially in the horizontal direction results in this way a good fit between the formwork panels and the holding element with its Zentriervorsprüngen. The formwork panels can slide during assembly with the edge webs along the centering projections and then enter into the groove-like interstices, so that they have a stable and defined position, especially after the assembly of all four supported on such a holding element formwork panels, in which the Schalhäute these formwork panels are due to the coincidence of the dimension of the edge webs in a matching plane. In use, in this way, at least a portion of the edge webs of the formwork panels can be held in a sliding or clamping fit in the passage opening receiving them and their groove-like spaces. A sliding seat has the advantage of slightly greater tolerance, a clamping fit the greater stability of the mutual fixing.

Since the coinciding corners of four adjoining formwork panels are to be detected, expediently four centering projections are respectively provided with the passage openings forming spacings, and two centering surfaces can be arranged on each centering projection whose cross sections are at right angles to each other and parallel to the cross sections of centering surfaces of adjacent centering projections run. Thus, each centering projection in the corner of a formwork panel act on the perpendicular to each other to this corner extending edge webs and thereby not only support the four formwork panels in the desired manner, but also hold together. The insertion of the formwork panels is favored because the centering projections can taper upwards in the region of their centering surfaces and in the region of the transition surfaces arranged between the two centering surfaces of a centering projection. Thus, an automatic alignment of the formwork panels takes place.

All centering projections may have a matching shape and matching dimensions and each adjacent centering projections may each be rotated by 90 ° to each other, in the position of use directed upward, be arranged. Thus, the centering projections in each case match the corners formed by edge webs of formwork panels and it is not necessary in each case to assign a specific formwork panel to a specific centering projection. Between two centering of a centering projection may be provided on the approximately the center of the holding member side facing a connecting surface which is flat or spherical and leaves in the use position, the inner edge of the corner edge formed by two edge webs acting on this centering projection board. On the one hand, this results in material savings on the centering projections and, on the other hand, also facilitates the laying on of the formwork panels in which possibly the corner region of the edge webs could be somewhat rounded.

It should be mentioned that the centering surfaces could also be flat, curved or spherical and also the cross section of the centering surfaces parallel to the formwork panels or to the holding plate could be straight or curved.

An expedient embodiment, which forms the right-angled planes in mutually orthogonal inclined centering surfaces, can provide that the centering projections are each a quarter of a pyramid which is divided at right angles to the boundaries of its base surface, the remaining pyramidal surface parts forming the centering surfaces between these pyramid side surface parts extending edges is preferably rounded or broken to form the already mentioned transition surface between the two centering surfaces.

This results in stable centering projections, which have the desired shape that essentially tapers from the bottom to the top and has the greatest extent at its base, where even the largest forces can occur.

An important and advantageous embodiment of the invention can Provide that on the underside of the support member and / or on the belonging to her plate or on the edge of this plate, in particular downwardly projecting coupling means are provided for connection with support means of the formwork. In this way, the holding element can be connected to carriers, supports or other support means and coupled in order to receive and transmit the transmitted from the formwork panels on the holding element forces.

It is expedient if on the underside of the holding element and / or its plate, a downwardly open, in the use position horizontally extending holding opening vorgese-

is "πU.e- -n _* clearance dexen approximately to the width of a formwork support the slabs corresponds. Thus, the holding member can be placed on a formwork beam by the retaining opening receives the top of this formwork support and at least embraces a part of the formwork support.

The holding opening arranged on the underside of the holding element can be delimited and formed by two parallel flanges or limbs or lugs or profiles, and the width of the underside holding opening can be dimensioned such that a sliding occurs with the support means of the formwork or with the formwork support in the position of use - Or clamped seat exists. Thus, it is sufficient to put the holding element with its lower-side holding opening on such a formwork support and this while embracing the holding opening to make the holding element in a desired position effective and possibly also determined by a clamping fit frictionally. This advantageously allows a stepless adjustment or adjustment of the holding element relative to a formwork support.

As a lower-side coupling agent can but at the bottom the retaining element or its plate also be provided at least one projection, which mates with the upper end of a commercial support. In many cases, slab formworks as support means for the formwork panels and their holding elements on supports, so that with appropriate design of the underside of the support member also a coupling with such a support is possible, which may be suitable for example for overreaching the upper support end.

In this case, a projection may be arranged on the underside of the holding element as a coupling means, which fits into an end opening of a commercial formwork support, in particular this at least beieichsweise filling. As a rule, such supports have at their upper end end-side openings, which can be exploited according to the invention, that the holding element with a lower-side projection fits into this opening and thus allows easy connection and coupling with the support.

The projection on the underside of the holding element may be a nozzle or round piece, whose outer dimension corresponds approximately to the inner dimension of a conventional circular perforation or opening at the top of a formwork support and in particular fits by clamping in this perforation. Such a cross-sectionally round coupling on the underside of the retaining element is particularly well compatible with correspondingly shaped perforations on supports and also allows the rotation of the retaining element relative to the support, if necessary. In addition to or instead of the coupling means already mentioned, fastening elements or holes for attaching fastening elements such as screws, bolts, rivets or the like could be attached to the retaining element and / or its plate or to the abovementioned projections, legs, tabs or the like be provided when a particularly firm and locally predetermined fixation of the retaining element is desired.

The holding element expediently consists of metal or hard plastic and at least the centering projections and the plate can be integral with one another, which gives the holding element a particularly high strength.

A particularly expedient embodiment of the invention can provide that the coupling means is designed such that the holding element is height-adjustable attachable to the support means of the formwork. This allows the slab formwork in the desired or required manner to adjust in height and align plan.

The coupling means for the height-adjustable support member may be a particular centrally arranged on the underside of the support member or its plate threaded bolt on which preferably engages a counter-thread or a rotatable relative to the support nut. Either the holding element could thus be rotated with its designed as a threaded bolt coupling means for height adjustment or for a continuous adjustment, the aforementioned mother can be rotated while the holding element remains undrilled, but is thereby displaced axially.

An additional or modified possibility for connecting the retaining element with formwork support means may be that the retaining plate has holes for fastening screws. Thus, it can be flange-mounted on a counter-plate. Even a perforation can be sufficient. Especially when combining one or more of the features and measures described above results in a slab formwork, in which in each case four formwork panels together in a horizontal position adjacent to each other can be detected and supported, their installation is very simple, since they center virtually automatically on the holding element and adapt to each other. All four formwork panels can be easily lowered from top to bottom on the holding element without undercuts must be considered.

Hereinafter, embodiments of the invention are described in more detail with reference to the drawing. It shows in partly schematized representation:

1 is a plan view of a slab formwork partially shown in the area of a support, wherein already two formwork panels are detected with their edge webs and corners on a holding element, a third formwork panel is lowered to the support member and the fourth formwork panel for the supported crossing point is still omitted

Fig. 2 seen in Fig. 1 area of a slab formwork seen from the side, with a Schalta- fei is already in centered position of use and a neighbor panel is lowered straight into this position of use, and with the edge web to be detected at a centering down to be led,

Fig. 3 shows a cross section of belonging to the ceiling formwork according to the invention retaining element, which is coupled with a support supporting it, according to the section line AA in Fig. 4,

4 is a plan view of the holding element shown in FIG. 3,

FIG. 5 is an illustration corresponding approximately to FIG. 3, wherein a pipe socket is provided on the underside of the holding element as coupling means, according to the section line A-A in FIG. 6, FIG.

Fig. 6 is a plan view of the holding element gem. Fig. 5,

Fig. 7 is a plan view of a modified support member in which a Zentriervorsprünge carrying the plate is formed as a flange plate and

Having holes for screws or bolts for coupling with a counter-plate,

Fig. 8 is a longitudinal section of the holding element according to the section line A-A in Fig. 7, wherein a serving for coupling with a counter-plate on a support screw and a pipe socket is visible.

9 shows a section corresponding to FIG. 8, wherein the retaining element has no pipe socket on its underside, but only one screw connection is provided for coupling with a counterplate;

10 shows an exemplary embodiment of a holding element in a top view, which is projected laterally from a counter plate arranged below it,

11 is a longitudinal section of the arrangement according to the sectional iinie AA in Fig. 10, wherein the retaining element has a pipe socket on the underside as coupling means, as well as

Fig. 12 shows an embodiment in which the coupling means on the underside of the plate of the holding element is a threaded bolt for a height adjustment of the holding element.

In the following description, matching objects and parts with respect to their function are given the same reference numbers even with a modified shape.

A designated as a whole with 1, in Fig. 1 only partially shown in a plan view, according to FIG. 1 and FIG. 2 in the use position horizontally arranged, rectangular, edge webs 3 having formwork panels 2 and in the various embodiments differently shaped, still descriptive support means for this Schalta- fine 2 and one or more in the use position contacting edge webs 3 adjacent formwork panels 2 in the corner regions of the formwork panels 2 detecting holding elements 4.

Especially in FIGS. 1 and 2 it can be seen how such a holding element 4 supports the four formwork panels 2, so that they lie in the use position in their corners to each other and touch each other sealingly, wherein the gap extending between them is designed cross-shaped.

Thus, the insertion of the formwork panels 2 is simple and the formwork panels 2 are virtually automatically centered and positioned, the holding element 4 according to FIGS. 1, 4, 6, 7 and 10 each have four centering projections 5, which cooperate according to FIG. 2 and also according to FIG. 1 with the edge webs 3 of the formwork panels 2 and these lead when placing and lowering the formwork panels 2 in their position of use, as shown mainly in Fig. 2 ,

2, 3, 5, 8, 9, 11 and 12 it can be seen that between the centering 5 in the use position horizontally extending, according to the other figures crossing, upwardly open through holes 6 are provided by lateral centering 7 of the centering projections 5 are limited, wherein the lateral boundaries or centering 7 of these through holes 6 from top to bottom approach each other at least to a mutual distance corresponding to the total thickness of two in use position touching edge webs 3 of two formwork panels 2, if these lie in the position of use of FIG. 1 to each other.

In Fig. 2 it can be seen that the passage opening 6 is half filled at the lower end by the edge web 3 of the already lowered board, so that the edge web 3 of the currently lowered board still fits into the through hole 6, which will then be completely filled , so that at the same time the edge webs 3 of the formwork panels 2 are firmly together.

Since, according to FIG. 1, the corner regions of a total of four mutually adjacent formwork panels are detected by the four centering projections 5 in this manner, the joints 8 of the formwork panels 2 crossing each other at this location are each held together tightly. The centering projections 5 are arranged in all embodiments on a square plate 9, which closes the through holes 6 down and serves as a support for the formwork 10 of the formwork panels 2 respectively facing edges of the edge webs 3 in the use position, as well in Fig. 2 recognize. The plate 9 could also be rectangular or round.

In this case, the centering surfaces 7 of the four centering projections 5 go at the point of their closest approach, which corresponds to the total thickness of two edge webs 3, in vertical boundaries 11 of groove-like spaces 12 between the centering over 5 whose clear width also corresponds to the thickness of two adjoining edge webs 3 The groove-like intermediate spaces 12 form the lower area of the passage openings 6 in the position of use, that is to say belong to these passage openings 6. This results in a defined definition of the edges of the formwork panels 3 on the holding elements. 4

Since the slab formwork 1 is formed with rectangular formwork panels 2, all four centering projections 5 have a matching shape and matching dimensions and each adjacent centering 5 are each rotated by 90 ° to each other in the use position directed upward, arranged on the plate 9, as it For example, in Fig. 4 or 7 or 10 is clearly visible.

According to FIG. 2, in the position of use a partial area of the edge webs 3 of the formwork panels 2 is held in the receiving opening 6 receiving them and in particular their groove-like spaces 12 in a press fit in order to achieve impermeability between the individual edge webs 3 against the ingress of concrete. Thus, the holding element with its centering 5, the additional function to keep the formwork panels 3 of the slab formwork 1 in the respective crossing points firmly together.

The four centering projections 5 are thus each arranged with a the passage openings 6 and the spaces 12 forming distance from each other and to each centering projection 5 two centering 7 are provided, the cross-sections of such a centering 5 with respect to the rectangular shape of the formwork panels at right angles to each other and parallel extend to the cross sections of centering 7 adjacent centering 5.

In the plan views of the retaining element 4 it can be seen that between two centering surfaces 7 of each centering projection 5 on the approximately the middle of the retaining element 4 side facing a connection surface 13 is provided, which may be flat or spherical and in the use position, the inner edge of the corner of this Centering projection 5 attacking switching board 2 leaves free. Correspondingly well fit the corners of the formwork panels 2 on these centering projections 5 and in addition weight can be saved in this way. Geometrically, the centering projections 5 can also each be regarded as a quarter of a pyramid which is divided at right angles to the boundaries of its base surface, so that the respective remaining pyramidal surfaces form parts of the centering surfaces, wherein the edges running between these pyramid side surface parts are rounded off or broken as connecting surfaces are. The resulting four quarters of a pyramid are also rotated by 90 ° to each other and thereby have the position shown in the exemplary embodiment relative to each other, so that the pyramid surface parts can serve as centering 7.

The holding element 4 can be used in different ways with Supporting the formwork to be connected. At the same time, in all exemplary embodiments, at least one downwardly projecting coupling means to be described below with reference to the different embodiments is provided on the underside of the retaining element 4 and the plate 9 belonging to it for connection to the different support means of the formwork.

The embodiment of FIGS. 1 to 4 is provided on the underside of the support member 4 and its plate 9 a downwardly open, in the use position horizontally extending retaining opening 14, the inside width of which corresponds approximately to the width of a formwork belonging to the formwork shuttering 15. In the exemplary embodiment, this holding opening 14 arranged on the lower side of the holding element 4 and the plate 9 is delimited and formed by two parallel lugs 16, but could also be arranged between two parallel flanges or legs or profiles. The clear width of this lower-side holding opening 14 is dimensioned so that at least one sliding seat or preferably a clamping fit with the support means or formwork support 15 in use position, this arrangement has the advantage that the holding element 4 is arranged relative to the carrier 15 in different positions can be.

According to FIGS. 5 to 8 and 11 can be provided as a coupling means on the underside of the support member 4 and its plate 9, a projection which mates with the upper end of the formwork 1 belonging to the commercial support 17 and in the embodiment as a round piece or pipe socket 18 is formed. This can match with game or possibly clamping in a conventional circular perforation on the top of a formwork support 17. In Fig. 7 and 9, an embodiment is shown, in which the coupling means for the holding element by the holding plate 9 passing through holes 19 is formed for fastening screws 20. In this case, the support 17 has at its upper end an end plate 21 with matching holes, so that the attachment of FIG. 7 and 9 is possible. FIG. 8 shows that this can be combined with the arrangement of a pipe socket 18 on the underside of the plate 9.

10 and 11 shows an arrangement in which in turn the pipe socket 18 engages in the support 17, which has an end plate 21 with mounting holes 19, but wherein the plate 9 is arranged between these holes 19.

Fig. 12 shows an embodiment in which the coupling means of the holding member 4 is formed such that this is adjustable in height on a support means, preferably on a support 17 of the formwork 1 attachable. It can be seen that the coupling means for the height-adjustable retaining element 4 is a threaded bolt 22 arranged centrally on the underside of the retaining element 4 or its plate 9, on which a mating thread, in the exemplary embodiment a nut 23 rotatable relative to the support 17, engages. If the nut 23 is rotated, that is, the retaining element 4 can be raised or lowered via the threaded bolt 22 in order to adjust the height of the shuttering panels to be engaged with this retaining element 4.

In the position of use, the slab formwork 1 has horizontally arranged, rectangular formwork panels 2 having edge webs 3 and support means such as supports 15 and / or supports 17 for these formwork panels 2 and a retaining element 4 which detects the edge webs 3 of adjacent formwork panels 2 in the corner area. which centering projections 5 for the edge webs 3 of these formwork panels 2 and between the centering 5 in the use position horizontally extending, intersecting, upwardly open through holes 6, which are bounded by lateral centering surfaces 7 of the centering 5. These lateral boundaries or centering surfaces 7 of the through holes 6 approach each other from top to bottom at least to a mutual distance corresponding to the total thickness of two touching in use position edge webs 3 of two formwork panels 2, below this closest approach of the centering 7 a nutartiger Interspace 12 can be provided as a continuation of the centering surfaces 7 for the positive gripping around the edges of the edge webs 3 of the formwork panels 2.

/ Claims

Claims

claims 1 slab formwork (1) with horizontally arranged in the position of use, rectangular, edge webs (3) having shuttering panels (2) and with support means for these formwork panels (2) and with a touching in the use position edge webs (3) adjacent formwork panels (2) in a retaining element (4) which has centering projections (5) for the edge webs (3) of the formwork panels (2) and which extends horizontally between the centering projections (5) in the position of use, intersecting, upwardly open passage openings (6) are provided, which are delimited by lateral centering surfaces (7) of the centering projections (5), and that the lateral boundaries or centering surfaces (7) of the through holes (6) from top to bottom approach each other at least to a mutual distance of the total thickness of two in the position of use touching edge webs (3) of each because it corresponds to two formwork panels (2). 2. slab formwork according to claim 1, characterized in that the centering projections (5) on a plate (9) are arranged, which closes the passage openings (6) downwards and as a support for the formwork skin (10) respectively facing away from the edges Edge webs (3) of the formwork panels in the use position is used. 3. slab formwork according to claim 1 or 2, characterized in that the centering surfaces (7) of the centering projections (5) at the point of their closest approach in vertical boundaries (11) of groove-like spaces (12) pass over between the centering projections (5) whose clear width corresponds to the thickness of two mutually adjacent edge webs (3), wherein the groove-like intermediate spaces (12) form the lower area of the through openings (6) in the position of use. 4. slab formwork according to one of claims 1 to 3, characterized in that in the use position at least a portion of the edge webs (3) of the formwork panels (2) in the receiving through openings (6) or their groove-like spaces (12) in a sliding or Clamp seat are held. 5. slab formwork according to one of claims 1 to 4, characterized in that four centering projections (5) are each provided with the passage openings (6) forming distances from each other and to each a centering projection (5) two centering surfaces (7) are arranged, whose cross-sections at right angles to each other and parallel to the cross sections of centering surfaces (7) of adjacent centering projections (5). 6. slab formwork according to one of claims 1 to 5, characterized in that all Zentriervorsprünge (5) have a matching shape and matching dimensions and that each adjacent centering projections (5) each rotated by 90 ° to each other, directed in the use position upwards are. 7. Slab formwork according to one of claims 1 to 6, characterized in that between two centering surfaces (7) of a centering projection (5) on the approximately the middle of the holding element (4) facing side a connecting surface (13) is provided, which is flat or spherical and in the position of use, the inner edge of the corner of the on this centering projection (5) attacking scarf board (2) leaves free. 8. slab formwork according to one of claims 1 to 7, characterized in that the centering projections (5) are each a quarter of a pyramid, which is divided at right angles to the boundaries of its base, so that the remaining pyramid surface portions form the centering surfaces (7) the edge running between these pyramid side surface parts is preferably rounded or broken. 9. slab formwork according to one of claims 1 to 8, characterized in that on the underside of the holding element (4) and / or belonging to it plate (9) or at the edge of this plate, in particular downwardly projecting, coupling means for connection with support means the formwork are provided. 10. slab formwork according to claim 9, characterized in that on the underside of the holding element (4) and / or its plate (9) has a downwardly open, in use position horizontally extending holding opening (14) is provided, the clear width of the Width of a formwork support (15) of the slab formwork (1) corresponds. 11. slab formwork according to claim 9 or 10, characterized in that the on the underside of the holding element (4) arranged holding opening (14) by two parallel flanges or legs or tabs (16) or profiles is limited and formed and that the width the underside teöffnung (14) is dimensioned so that with the support means of the formwork or formwork support (15) in the position of use a sliding or clamping fit. 12. Slab formwork according to one of claims 1 to 11, characterized in that the coupling means is designed such that the holding element is adjustable in height on the support means of the formwork (1) attachable. 13. Ceiling formwork according to claim 12, characterized in that the coupling means for the height-adjustable holding element (4) is a particular centrally on the underside of the holding element (4) or its plate (9) arranged threaded bolt (22) on which preferably a mating thread and / or a relative to the support (17) rotatable nut (23) engages. 14. Ceiling formwork according to one of the preceding claims, characterized in that the holding plate (9) perforations (19) for fastening screws (20). / Summary