EP3572198A1 - Formwork core for a formwork system for the concreting of a bell body - Google Patents

Abstract

Formwork core for a formwork system for concreting a bell body. Each two corner supports (54) are releasably secured at a variable distance on a base frame (60). The corner supports (54) each carry two Eckanschlusstafeln (51), which are arranged at right angles to each other over the corner and synchronously retractable and extendable without touching. The corner posts (54) further carry corner elbows (55) which are also retractable and extendable and, when fully extended, close the gap between the two associated corner fitting panels (51) to form a vertical outer shell of the formwork core (50). The corner vertical edges of the corner fitting panels (51) have inwardly facing screw flanges (52a). Optionally, at least one side panel (52) can be inserted between the corner connection panels (51) of one side.

Description

The present invention relates to a formwork core for a formwork system for concreting a bell body, in particular larger building cells of residential buildings.

Such a formwork system consists essentially of an outer formwork and the formwork core, which is generally cuboid and is used in the outer formwork. The external formwork has a fixed formwork floor as well as vertical longitudinal walls and end walls, which rise on a formwork floor. The shuttering core sits between the shuttering walls of the outer shuttering. Liquid concrete is pressed into the remaining space between the outer formwork and the formwork core. After hardening of the concrete, the outer formwork elements are removed. In order to release the formwork core from the inner walls of the finished concreted bell body, the side formwork elements of the formwork core must be retracted inwards to be released from the finished concrete part.

Formwork cores with inwardly retractable side formwork elements, so-called shrink cores, are known from the prior art.

The European patent EP 2 083 977 B1 The applicant describes a formwork system for concreting room modules comprising outer formwork and formwork core. The formwork core comprises a cover element, end elements and side elements as well as a coupling mechanism. The end elements and side elements are respectively coupled to the bottom and the lid member and movably connected. The coupling mechanism is formed such that vertical movement of a horizontal member causes movement of the vertical members inward so as to reduce the distance between the opposed vertical members. The coupling mechanism includes a plurality of pivot levers.

DE 20 469 03 A1 describes a method for producing a bell body for larger building cells and an apparatus for carrying out the method. An embodiment of the device comprises a fixedly arranged formwork core with columns and retractable side molds. The side moldings are suspended by several handlebars on the columns pivotally. The mechanism of pivoting causes a folding back of the side molds so that wedge-shaped gaps between the walls of the finished concrete body and the formwork elements arises.

Another older patent of the applicant, EP 1 923 185 B1 , describes a displacement body, which is designed as a shrink body and after concreting upwards from a side formwork can be pulled out.

DE 25 04 218 A1 describes a formwork core for Raumzellenschalungen, which is used as an inner mold for the manufacture of a garage or similar body. The formwork core has a variable cross-section. Between each pressure bar game is provided in each case, so that the cross-section can be reduced to remove the formwork.

DE 40 04 654 C1 discloses a formwork core for making prefabricated garages or similar concrete room cells. The formwork core can be adjusted in its width. The adjustability of the width is made by the Arrangement of formwork on sledges that can be moved on rails.

While the outer formwork consists of comparatively simple, in principle flat formwork walls, a formwork core with retractable side formwork elements is rather complicated and technically complex. The total cost of a formwork system for concreting a bell body are therefore determined mainly by the cost of the complex formwork core.

The outer formwork elements required for concreting a block-shaped bell body are in principle designed as planar formwork panels. Therefore, the outer formwork parts can be used again and again, even if a bell body with other dimensions, in particular larger or smaller width and / or length to be produced. All you have to do is reassemble the flat shuttering walls.

In contrast, a shrink core can always only be used for a specific room cell with predetermined fixed dimensions in three dimensions. Due to the complex construction and the complicated adjustment mechanism, such a shrink core is difficult to disassemble into its individual parts again to reuse these for the production of a new formwork core with other dimensions. This has the consequence that the conventional shrink cores are usually used only when a larger number of identical bell body is to be concreted, since then the relatively high cost of the shuttering core can be allocated to the number of concrete parts produced.

Against this background, it is an object of the present invention to provide a shuttering core with inwardly retractable side shuttering elements, which can be changed quickly and easily so that it is suitable for the production of bell bodies of different dimensions, in particular different width and length.

In the solution of this problem is based on a formwork core according to the preamble of the first claim, comprising a base, vertical corner posts and side formwork elements, which are suspended via pivot levers on the corner posts such that the side formwork elements are retractable to the inside.

The object is achieved by the features of the characterizing part of the first claim.

In the case of the formwork core according to the invention, two corner supports each are detachably fastened at a variable distance on a common base frame. The corner supports each carry two corner connection panels which are arranged at right angles to one another and can be retracted and extended synchronously without touching each other. The Eckanschlusstafeln have a flat outer wall, which is designed as a shutter wall. When fully extended, a narrow vertical gap remains between the two corner panels in the area of the corner.

The corner supports also each carry a Eckwinkelstück, which is retractable and extendable synchronously with the Eckanschlusstafeln. When fully extended, this corner piece closes the gap between the two associated corner connection panels, thereby forming a vertical outer edge of the formwork core.

According to the invention, the vertical edges of the corner connection panels remote from the corner are designed such that they can be detachably connected to one another. This makes it possible that lying in a plane Eckanschlusstafeln, z. B. form a side surface of the formwork core, are directly connected to each other. The resulting formwork core then has a minimum length or width. If necessary, one or optionally also a plurality of intermediate elements between the Eckanschlusstafeln one side can be used detachably. In this way, the width or length of the formwork core can be increased in a very simple manner, if a larger Bell body is to be concreted. If necessary, the formwork core according to the invention can also be restored to its original dimensions by directly connecting the mutually facing vertical edges of the Eckanschlusstafeln again.

The formwork core designed according to the invention thus has the great advantage that it can be easily adapted to different dimensions of a bell body to be concreted, without changing those elements which are structurally complex and therefore particularly expensive to manufacture. In particular, the corner supports, the Eckanschlusstafeln movably mounted on the corner supports and corner angle pieces can be used over and over again, even if the hollow body to be concreted have very different dimensions. The same applies to the complex coupling mechanism for driving the shrink core.

According to the invention, the corners of the formwork core are formed by two, in principle, flat Eckanschlusstafeln which are arranged at right angles to each other via the corner, and a Eckwinkelstück which closes the gap between the adjacent Eckanschlusstafeln and forms the vertical outer edge of the formwork core. This construction has the advantage that the length of the Eckanschlusstafeln can be easily varied. Thus, it is possible to easily realize wider and shorter or narrower and longer formwork cores by simply using shorter or longer corner fitting panels. The corner supports with their elaborate lever mechanisms and the coupled angle corner pieces can be used in any case without modification.

In order to connect the vertical edges of the corner connection panels, which are remote from the corner, quickly and simply, but nevertheless firmly, and then release them again later, the corner connection panels have inwardly pointing screw flanges on the free edges. By means of these screw flanges, the Eckanschlusstafeln one side can either be connected directly to each other detachable or alternatively one or more extension parts are recognized.

Preferably, the Eckwinkelstücke are coupled to the Eckanschlusstafeln such that when pulling, so the shrinkage of the formwork core, the Eckwinkelstücke drive in front of the Eckanschlusstafeln to the inside. As a result, the corner angle pieces move out of the way before the corresponding corner connection panels are retracted inwards.

The formwork core according to the invention is advantageously supplemented by a central ceiling panel which sits horizontally on the corner supports, wherein the Eckanschlusstafeln and the associated corner angles are so coupled to the Eckstützen that when retracting the formwork core, the Eckanschlusstafeln and associated Eckwinkelstücke inside and at the same time on the stationary Move the slab formwork board upwards. Although the length and width of such a ceiling panel can not change later; but since this formwork element is in principle a simple flat plate, an optionally required replacement of the ceiling panel within a reuse of the other, much more complex parts of the formwork core for concreting a bell body with other dimensions in terms of cost barely significant.

Appropriately, the corner connection panels and corner angle pieces have at their upper edges ceiling webs, which are attached at right angles inwards. In the fully extended state of the formwork core, these ceiling bridges together with the central ceiling panel form the top of the formwork core. With the onset of shrinkage, the horizontal ceiling bars separate from the ceiling panel and go up and then inward.

According to the invention, the distance between two corner supports can be varied by these corner supports are releasably secured together on a base frame. As a result, either the width or the length of the formwork core can be easily adjusted. Preferred is an embodiment in which the base frames have a plurality of parallel fastening grooves, engage in the fastening means, which are arranged at the foot of the corner supports.

This allows the two corner supports, which are mounted on this base frame, steplessly move to vary the distance between the corner supports. Particularly preferred is an embodiment in which the base frames comprise a number of parallel and spaced apart T-beams. Each two adjacent T-beams form a fastening groove for fixing the corner supports.

Optionally, at least one side panel can be detachably inserted between two corner connection panels, which form a side surface of the formwork core. As a result, the length and / or width of the formwork core can be increased in a simple manner, if the Eckanschlusstafeln themselves are not sufficiently long and should not be replaced by Eckanschlusstafeln greater length. In principle, the Eckanschlusstafeln can be made very narrow, so be formed very short in the horizontal direction; the length and / or the width of the formwork core is then determined essentially by the dimensions of the intermediate elements.

Appropriately, not only the corner connection panels, but also the optional side panels have on their vertical edges inwardly facing screw flanges, which correspond to the screw flanges of Eckanschlussteile. This allows a quick and detachable screw connection between corner connection panels and side panels.

Figur 1a

Ein Schalungssystem mit Schalungskern und Außenschalung, in vereinfachter perspektivischer Darstellung;

Figur 1b

den Schalungskern des Schalungssystems von Fig. 1a, ohne Deckenschaltafel;

Figur 2a

einen zweiten kleineren Schalungskern, in einer perspektivischen Ansicht schräg von oben;

Figur 2b

den Schalungskern von Fig. 2a, ohne Vorderseite;

Figur 2c

den Schalungskern von Fig. 2a, ohne Vorderseite, Rückseite und Deckenschaltafel;

Figur 2d

den Schalungskern von Fig. 2a, ohne Seitenschalungselemente und Deckenschaltafel;

Figur 3

eine obere Ecke des Schalungskerns von Fig. 2a, von der Innenseite gesehen und in vergrößertem Maßstab;

Figur 4

eine Eckstütze des Schalungskerns von Fig. 2a mit Eckwinkelstück;

Figur 5

die Seitenschalungselemente des Schalungskerns von Fig. 2a, von der Innenseite aus gesehen und in vergrößertem Maßstab.

Embodiments of the invention are described below with reference to the accompanying drawings. Show it:

FIG. 1a

A formwork system with formwork core and outer formwork, in a simplified perspective view;

FIG. 1b

the formwork core of the formwork system of Fig. 1a , without ceiling panel;

FIG. 2a

a second smaller formwork core, in a perspective view obliquely from above;

FIG. 2b

the formwork core of Fig. 2a , without front side;

Figure 2c

the formwork core of Fig. 2a , without front, back and ceiling panel;

Figure 2d

the formwork core of Fig. 2a , without side formwork elements and ceiling panel;

FIG. 3

an upper corner of the formwork core of Fig. 2a seen from the inside and on an enlarged scale;

FIG. 4

a corner support of the formwork core of Fig. 2a with corner elbow;

FIG. 5

the side formwork elements of the formwork core of Fig. 2a , seen from the inside and on an enlarged scale.

The formwork system according to Fig. 1a consists of a bottom plate 10, an outer formwork 20 and a formwork core 30, which is designed as a shrink core.

The outer formwork 20 comprises two opposite end walls 21, two side walls 22 arranged at right angles thereto and a number of vertical outer supports 23 on which the end walls 21 and the side walls 22 are suspended. The outer supports 23 are releasably secured in guide rails 24, so that all side-formwork elements can be moved away after concreting to the outside.

The formwork core 30 stands between the outer formwork 20. The (not shown) bell-shaped concrete part can be pulled out or hardened vertically after hardening, wherein it releases from the formwork core 30. The formwork core 30 has the shape of a rectangular parallelepiped whose underside is open. Its outer walls are formed by a total of eight corner connection panels 31, four between two corner connection panels 31 used side panels 32 and a central horizontal ceiling panel 33 (see Fig. 1a . 1b ).

Fig. 1b allows a look into the interior of the formwork core 30. On display are four vertical corner supports 34, each carrying two Eckanschlusstafeln 31. Two of the total of eight corner connection panels 31 are arranged at right angles to one another via a corner, so that they enclose one of the four corners of the formwork core 30. The corner supports 34 also each carry a Eckwinkelstück 35, which closes the gap between the two associated Eckanschlusstafeln 31 and thus forms a vertical outer edge of the shuttering core 30.

Between the corner supports 34 two vertical side supports 36 are arranged along the two longitudinal sides of the formwork core 30. These side supports 36 carry the side panels 32.

The corner supports 34 and the side supports 36 are releasably secured in pairs on a respective common base frame 40. The distance between the corner supports 34 or side supports 36 mounted on a base frame 40 is variable, so that the width of the formwork core 30 can be adjusted. The base frames 40 have a number of mutually parallel, upwardly open mounting grooves 41. The base frame 40 includes a plurality of parallel and spaced apart T-beam 42, between which the mounting grooves 41 are formed. The ends of the T-beams 42 are screwed on narrow cross member 43, which on the bottom plate 10 (see Fig. 1 ) rest.

The guide rails 24 for the outer supports 23 ( Fig. 1a ) project beyond the outer contour of the formwork core 30, so that the outer formwork 20 (FIG. Fig. 1a ) can be moved far enough outwards. As a result, the formwork core 30 is accessible and can be easily moved up after hardening of the concrete. For this purpose, a lifting frame 50 engages under the lower edges of the formwork core 30. If this lifting frame 50 is driven upwards after hardening of the concrete, the (not shown) hardened concrete part of the outer walls of the formwork core 30; At the same time, the formwork core 30 shrinks by retracting the corner connection panels 31, the side panels 32 and the corner elbows 35 in a synchronized manner. As a result, the outer sides of the formwork core of the concrete part to solve. The Eckwinkelstücke run in front. The kinematics can be driven electrically, hydraulically or purely mechanically.

The in Fig. 2a and formwork core 50 shown in the figures below is slightly smaller, in particular narrower and shorter than the formwork core 30 described above Fig. 1a . 1b , However, both formwork cores 30 and 50 are constructed the same in principle.

Also, the smaller formwork core 50 is formed as a shrink core. The side formwork elements of the formwork core 50 comprise a total of eight corner connection panels 51, four side panels 52 arranged therebetween and a central, approximately square ceiling panel 53 Fig. 2a the side mold elements are raised a little bit upwards. The gap between the two Eckanschlusstafeln 51 a corner fills an elongated Eckwinkelstück 55, which forms the vertical outer edge of the formwork core 50.

The supporting structure of the formwork core 50 is formed in particular by four vertical corner posts 54, as shown in FIGS FIGS. 2b . 2c and 2d good to see. Two of these corner supports 54 are detachably fastened on a common base frame 60 ( Fig. 2a ). For this purpose, the corner supports 54 have at their lower end foot plates 56 with fastening screws 56a (FIG. Fig. 2d ). The lower (not visible) ends of the fastening screws 56 a engage in fastening grooves 61 of the base frame 60. The base frame 60 consist essentially of six, parallel and with a little distance next to each other arranged T-beams 62, whose ends are screwed onto cross member 63. The T-beams 62 form the fastening grooves 61 with a T-shaped profile. After loosening the fastening screws 56a, the corner supports 54 can be moved longitudinally in the fastening grooves 61, in this way To increase or decrease the distance between the corner supports 54 and thus to change the length of the formwork core 50.

As in particular in Figure 2d to see the corner supports 54 each carry two brackets 57 which are arranged at right angles to each other across the corner. These brackets 57 are pivotally connected by pivot lever 58 with the corner supports 54. Similarly, the Eckwinkelstücke 55 via lever arms 59 hingedly connected to the corner supports 54 (see Fig. 2b ). On the brackets 57, the Eckanschlusstafeln 51 are mounted (see Fig. 2c ).

The enlarged view of Fig. 3 lets recognize the upper end of a corner support 54. The corner support 54 has a hexagonal cross-section. The pivot levers 58 for the Eckanschlusstafeln 51 and the lever arm 59 for the Eckwinkelstück 55 stand outward. In the figure, the Eckwinkelstück 55 has moved a small distance inward, so that in the corner area a gap between the two adjacent Eckanschlusstafeln 51 has arisen. When fully extended formwork core 50 of this gap is of course closed. The adjacent Eckanschlusstafeln 51 have already gone a bit up here.

Fig. 4 lets the cross-sectional profile of the Eckwinkelstücke 55 recognize. The Eckwinkelstück 55 consists essentially of an elongated L-profile. At the upper end is a ceiling bridge 55a, which is attached at right angles and points inwards.

Out Fig. 2c and in particular the enlarged illustrations of Fig. 3 and Fig. 5 It will be appreciated that the corner fitting panels 51 each have screw flanges 51a at right angles inwardly at their vertical edges remote from the corner. The interposed side panels 52 have corresponding screw flanges 52a (see FIG Fig. 5 ). In this way, either two corner connection panels 51, which lie in the same plane, can be screwed directly against one another or detachably connect two corner connection panels 51 with a side panel 52.

The Eckanschlusstafeln 51 have at their upper edges at right angles inwardly set ceiling webs 51b ( Fig. 2c . Fig. 3 ). The Eckwinkelstücke 55 have at its upper end a rectangular inwardly applied ceiling web 55 a, as in particular in the FIGS. 2b and 4 is recognizable. The side panels 52 have equal length ceiling webs 52b (see Fig. 2c and Fig. 3 ).

The Eckwinkelstücke 55 are resiliently mounted at their lower ends on pressure plates 70 (see Fig. 4 ). As a result, the ceiling webs 55a of the Eckwinkelstücke 55 can push under the ceiling webs 52b of the adjacent Eckanschlusstafeln 51 when the formwork core 50 is shrunk (see Fig. 3 . Fig. 2a . Fig. 2b ).

Horizontally and vertically arranged tension and compression bars 80 stiffen the construction ( Fig. 2d ).

Fig. 2a shows the formwork core 50 in a state in which the Eckanschlusstafeln 51 are still extended almost completely outward, the Eckwinkelstücke 55 but already a small piece were pulled inwards or downwards. In Fig. 2b the Eckanschlusstafeln 51 and Eckwinkelstücke 55 have moved a little further up, so that the way is free to move in the following now the Eckanschlusstafeln 51 further inward. They detach themselves from the walls (not shown) on the outside of the finished concreted bell body.

reference numeral

10

baseplate

20

external formwork

21

Front wall (from 20)

22

Side wall

23

external support

24

guide rail

30

formwork core

31

Corner connection board (from 30)

32

Page form panel

33

Formwork panel

34

Corner column

35

Eckwinkelstück

36

side support

37

lifting frame

40

base frame

41

Fixing groove (from 40)

42

I-beam

43

crossbeam

50

(smaller) formwork core

51

Corner connection board (from 50)

51a

screw flange

51b

top web

52

Page form panel

52a

Screw flange (from 52)

52b

Ceiling bridge (from 52)

53

Formwork panel

54

Corner column

55

Eckwinkelstück

55a

Ceiling bridge (from 55)

56

footplate

56a

Fixing screw (in 56)

57

holder

58

pivoting lever

59

lever arm

60

base frame

61

mounting groove

62

I-beam

63

crossbeam

70

printing plate

Claims (9)

Formwork core for a formwork system for concreting a bell body, comprising a base, vertical corner posts and side formwork elements which are pivotally suspended from the corner posts so that the side formwork elements are retractable inwardly,
characterized in that
two corner supports (34, 54) are releasably secured at a variable distance on a common base frame (40, 60);
the corner supports (34, 54) each carry two corner connection panels (31, 51) which are arranged at right angles to each other at a corner and are synchronously retractable and extendable without touching each other, wherein when fully extended a narrow vertical gap exists between the two corner connection panels in the Area of the corner remains;
the corner posts each carry a corner elbow (35, 55) which are synchronously retractable and extendable and when fully extended close the gaps between the two associated corner fitting panels (31, 51) to form a vertical outer edge of the formwork core (30, 50) ;
each of the corners remote from the corner vertical edges of Eckanschlusstafeln (31, 51) are detachably connected to each other. Formwork core according to claim 1, characterized in that the Eckanschlusstafeln (31, 51) at the edge remote from the corner vertical edges inwardly facing screw flanges (52a) have. Formwork core according to one of the preceding claims, characterized in that the Eckwinkelstücke (35, 55) with the corner supports (34, 54) are coupled such that when retracting the Eckwinkelstücke drive in front of the Eckanschlusstafeln to the inside. Formwork core according to one of the preceding claims, characterized in that on the corner supports (34, 54) a horizontal ceiling panel (33, 53) sits and the Eckanschlusstafeln (31, 51) and the associated Eckwinkelstücke (35, 55) so coupled to the corner posts are that when retracting the formwork core, the Eckanschlusstafeln and Eckwinkelstücke drive up above the Deckenschaltafel addition. Formwork core according to claim 4, characterized in that the Eckanschlusstafeln (31, 51) and the Eckwinkelstücke (35, 55) at their upper edges at right angles inwardly set ceiling webs (51b) and in the fully extended state of the formwork core, these ceiling webs and the central ceiling panel ( 33, 51) form the flat top of the formwork core. Formwork core according to one of the preceding claims, characterized in that the base frames (40, 60) have a plurality of parallel fastening grooves (41, 61) in which engage at the foot of the corner supports (34, 54) arranged fastening means. Formwork core according to claim 6, characterized in that the base frames (40, 60) comprise a number of parallel and spaced T-beams (42, 62). Formwork core according to one of the preceding claims, characterized in that between the Eckanschlusstafeln (31, 51) which form a side surface of the formwork core (30, 50), in each case at least one side panel (32, 52) can be inserted. Formwork core according to claim 8, characterized in that the side panels (32, 52) have at their vertical edges inwardly facing screw flanges (52a) which correspond to the screw flanges (51a) of the Eckanschlusstafeln (31, 51).

Images