EP3795777A1 - Shuttering device for shuttering a wall opening - Google Patents

Abstract

Shuttering device for shuttering openings (10) on walls with a shuttering panel (12) against the escape of fresh concrete (5a) and with a fastening device (15) that holds the shuttering panel (12) in its shuttering position at the opening (10) against the escape of the Fresh concrete (5a) filling the opening (10) holds,
characterized in that the fastening device (15) has a pulling unit (19) which extends through a panel opening (20) in the formwork panel (12) and into the opening (10) and which extends on the one hand on a support device (4) arranged on the wall side. and on the other hand can be fixed directly or indirectly to the formwork panel (12) in the holding engagement.

Description

The invention relates to a shuttering device for shuttering openings on walls with a shuttering panel against the leakage of fresh concrete and with a fastening device that holds the shuttering panel in its shuttering position at the opening against the escape of fresh concrete filling the opening, as well as a method for shuttering openings on walls with a shuttering panel of a shuttering device to prevent fresh concrete from escaping.

It is common practice on construction sites to form or close a side open narrow side of a double wall element formed from two spaced-apart precast wall parts of a concrete wall by means of a shuttering panel or a shuttering board before fresh concrete is poured in. This shuttering board is held by auxiliary structures with iron girders or angle irons or the like, which are fixed on the outside of the two prefabricated wall parts via screw connections that require external boreholes on the prefabricated wall parts. This procedure is very complex and also requires a subsequent closing of the drill holes made only for the anchoring.

The object of the invention is to create a shuttering device mentioned at the beginning which is improved with regard to its attachment to a wall, as well as to specify an improved method for attaching such a shuttering device.

In the case of the shuttering device mentioned at the beginning, the object is achieved according to the invention in that the fastening device has a pulling unit which extends through a panel opening in the shuttering panel and into the opening and which is supported on the one hand on a support device arranged on the wall and on the other hand directly or indirectly on the shuttering panel can be fixed in the holding engagement.

Advantageous refinements of the invention are given in the dependent claims.

In the shuttering device according to the invention, the fastening device with the pulling unit is accordingly arranged in a region of the shuttering panel in which the shuttering panel closes the opening in the wall with its shuttering surface.

Walls with openings to be shuttered are any type of walls or ceilings on structures in the construction or completion of which fresh concrete is used which, in its flowable state, must be prevented from escaping through such openings. Such walls are in particular hollow walls or double wall elements with precast wall parts that are spaced apart from one another. An open side between the two prefabricated wall parts at the end of a double wall element represents such an opening to be shuttered. In this case, a shuttering panel of the shuttering device forms an end shuttering of this opening or the double wall element. The formwork panel then expediently rests against the edges of the two prefabricated wall parts. Openings to be shuttered are also located in a comparable manner, for example on recesses in double wall elements that are provided for windows or doors. Furthermore, a recess in a ceiling can represent such an opening to be shuttered. The shuttering panel then rests in its shuttering position on the underside of the ceiling surrounding the recess or the opening. Fresh concrete is poured into the opening and closes it after it has hardened.

A support device arranged on the wall represents any solid structure that can support high forces applied via the pulling unit. Such a support device arranged on the wall side can be a fixed part of the wall or can be positioned as an independent part on the wall and supported thereon, in particular without screws or similar fastening means for which bores would have to be made in the wall. In particular, shuttering takes place in such a way that a shuttering panel is attached to the outer surfaces of the two prefabricated wall parts of a double wall element without support or fastening. So it can be dispensed with, in these outer surfaces z. B. to generate drill holes for screws or other fasteners. The formwork panel is fastened using simple means on the support device that is already present or can be easily attached. The support device can have different designs, which always have support elements arranged in such a way on which the fastening device can be brought into engagement with the pulling unit for the transmission of pulling force. The support device is, in particular, a spacer device with steel rods or steel wires, which hold two opposing prefabricated wall parts of a double wall element at the correct distance. The support device can have at least one rod or a carrier or the like, in particular when shuttering an opening in a ceiling, which is arranged or placed on the upper side of the ceiling and spans the opening.

A pulling unit of the fastening device is therefore located with its section attached to the support device on the other side of the shuttering panel in the opening to be shuttered and is embedded therein in the fresh concrete to be filled and remains at least partially in the cured fresh concrete.

The shuttering device can depend on the height of the double wall element or on the length of the opening, which z. B. is located on the narrow side of the double wall element to be shuttered or on a window or door recess, have only one formwork panel or also several formwork panels arranged flat next to one another.

The fastening device of the formwork panel contains at least one pulling unit. The fastening device expediently contains several traction units, the formwork panel having a panel opening for each traction unit. The formwork panel can also have a number of panel openings which is greater than the number of pulling units to be attached. Panel openings that are not required for the shuttering can be closed by closing elements such. B. Closing caps are closed.

Each panel opening is preferably a round through-hole or hole in the formwork panel. The diameter of the panel opening is selected such that the pulling unit can preferably be easily pushed through and is received therein with play.

The pulling unit can be fixed or fixed directly on the formwork panel in the holding engagement. So the traction unit z. B. on the opposite side of the formwork surface or outside of the formwork panel or on a z. B. annular and inserted in the panel opening insert part can be set in particular with a holding device. On the other hand, the pulling unit can also be fixable indirectly with the interposition of an additional component on the formwork panel in the holding engagement.

A holding engagement is realized by any fixing or fixing of the pulling unit directly or indirectly on the formwork panel.

In a preferred embodiment, the fastening device has a tensioning device which pretensions the pulling unit in its holding engagement on the formwork panel. The tensile force with which the shuttering panel is pressed against the parts of the wall surrounding or delimiting the opening can be significantly increased by means of a tensioning device. A clamping device can, for. B. a screw device, a pulling device or a winding device which can bring about a particularly mechanically acting increase in the clamping force, expediently by translating a manual actuating force. Accordingly, the pretensioning force is significantly increased by means of the tensioning device, particularly when the pulling unit is attached manually.

The pulling unit preferably contains at least one especially elongated pulling element. Such a tension element is, for example, a tie rod, a tension rope or a tension belt. Furthermore, the pulling unit can comprise a combination of at least two pulling elements. For example, a tie rod can be combined with a tension cable in such a way that the tie rod is provided for engagement with the support device and the tension cable connected to the tie rod runs through the panel opening and z. B. is set biased by means of the clamping device in the holding engagement on the formwork panel.

Such a pull rope is in particular a tensile rope such as a high-strength steel rope, synthetic fiber rope or textile rope. The pull rope is preferably a synthetic fiber rope made of high-modulus polyethylene fibers. Such a synthetic fiber rope is z. B. known under the brand name Dyneema®.

In a preferred embodiment, the tensioning device has a winding device which is combined with a ratchet mechanism. The winding device is provided for winding up the tension element or the tension rope or the tensioning belt. The ratchet mechanism supports the operator in winding the pull rope or tensioning belt onto a winding shaft and keeps the pulling rope or tensioning belt locked in the tensioned position.

The winding device expediently contains a fixing device for fixing the pull rope on the winding shaft. With the fixing device, the pull rope can be fixed to the winding shaft before or during the initial winding. Such a fixing device comprises, for example, a slotted winding shaft. The pull rope is inserted through the slot in the winding shaft and z. B. secured against pulling out by a clamping piece or a thickening formed by a knot of the pull rope.

In a preferred embodiment, the fixing device contains a fixing part which is mounted on the winding shaft of the winding device so that it can be moved, preferably radially to the winding shaft. The fixing part rests on a first layer of the pull rope placed on the winding shaft. As the winding shaft continues to rotate, the fixing part is covered by a second layer of the pull rope placed on the rotating winding shaft. This second layer and possibly further layers of the pull rope press the fixing part against the winding shaft and clamp the first layer of the pull rope firmly. The fixing part is z. B. formed strip-shaped. In particular, it can be arranged at a distance from the circumference of the winding shaft and in a parallel alignment to the axis of rotation of the winding shaft by means of two pins. The two pins are e.g. B. mounted in radial bores in the winding shaft radially to the axis of rotation. The fixing part is mounted on the pin so as to be movable radially to the winding shaft or is mounted to be displaceable with the pin in the bores. The fixing part is held in an outer position on a stop, for. B. on an enlarged head or collar of each pin. The fixing part can be in its outer position, for. B. be biased by spring force. In the outer position, with the formation of a gap, the fixing part is spaced from the circumference of the winding shaft to such an extent that the pull cable can be pushed through this gap with its free end. The fixing part accordingly represents, in particular, a clamping part.

Appropriately, the tension element or the tension rope or the tensioning belt can be attached or attached to the support device in a tensile manner by means of knotting and / or looping. A knot as well as a looping represents an attachment that is easy to produce and that can be attached universally and flexibly to the respectively required location of the support device or a support element. Special auxiliary devices are not required.

The pull rope or the tensioning belt preferably contains a loop or an eyelet at its front end or fixing end that can be fixed to the support device. The front end of the pull rope is positioned with the loop or eyelet in a wrapping position engaging behind the support element in such a way that the free end of the pull rope is inserted through the loop or eyelet and outwards into Direction to the formwork panel to be attached can be guided. In principle, the loop or eyelet can also be slipped onto a free end of a support element or another part of the support device, so that looping is not necessary.

According to a preferred embodiment, a sealing bushing or a seal is arranged on the panel opening of the shuttering panel, through which the tension element extends. The sealing bushing or the seal expediently seals the panel opening against the escape of fresh concrete. The sealing bushing can also be a bushing with an inserted seal. The bushing or seal is designed and made of such a material that it seals the tension element and the panel opening even when the tension element does not extend perpendicular to the formwork panel into the panel opening, but rather at an angle or inclined to the formwork panel due to its actual fastening point on the support device runs, d. H. at an angle to the formwork panel that deviates from 90 °. The seal or the bushing has a diameter that is larger than that of the panel opening in such a way that it can seal the panel opening even with such an oblique pull of the tension element. When the tension element is pulled diagonally, the tension element can rest against the edge of the panel opening in accordance with the direction of the diagonal pull and thereby move the bushing or seal radially to the panel opening. The diameter of the bushing or seal is adapted to this radial offset and is always sufficient to close the panel opening.

It is particularly preferred if seals and bushings in different sizes or with different diameters are available and can be used. The seals and bushings can be selected and used according to the respective sizes of the panel openings in the formwork panels. This ensures that the fastening device can be used universally.

The seal or the bushing expediently protrudes from the shuttering surface of the shuttering panel. The seal or the socket then forms in the hardened concrete, in particular a cup-shaped recess, which has a free space around a associated portion of the cast in the concrete tensile element surrounds. After removing the formwork panel and the socket or the seal and the protruding from the concrete portion of the tension element, this recess in the concrete z. B. be filled with filler.

The pull rope can have a reinforcement or a sheath at its free end, which is assigned to the tensioning device. The free end of the pull rope is solidified or surrounded by a sheath in such a way that individual fibers or wires of the pull rope cannot fray at the free end of the pull rope. Plastic fibers of the pull rope can, for. B. be welded to a fixed end. This facilitates the insertion of the pull rope into a bore or opening of a seal or a bushing, especially if the diameter of the bore or opening is intended for play-free insertion of the pull rope or the pull rope is received in the bore or opening with a slight interference fit, so that moving the seal relative to the pull rope requires a certain amount of force. Attaching the pull rope to the tensioning device or the winding shaft can also be facilitated.

The formwork panel can be connected to a support element on its rear panel opposite the formwork surface. Such a carrier element is, for example, a frame part of a formwork frame carrying the formwork panel. Such a carrier element expediently contains a recess which is oriented towards the panel opening and through which the pulling unit or a pulling element extends. The recess in the carrier element is preferably formed like a tube. A z. B. sleeve-like insert part is arranged in the recess, the end face of which is preferably arranged at the same level as the shuttering surface of the shuttering panel and against which the seal rests. The seal can therefore also move and adapt in the radial direction on the insert and the formwork surface when the tension element is pulled at an angle and its radial adaptation in the opening of the insert part while the tension cable is being tensioned.

According to a preferred embodiment it is provided that the wall has a double wall element with two spaced apart wall prefabricated parts, which by means of the supporting device representing a spacing device are held in their mutual spacing with an intermediate cavity to be poured with fresh concrete. The shuttering panel rests with its shuttering surface in a shuttering system against the edges of the two prefabricated wall parts that delimit the opening. The opening is on the laterally open narrow side of the double wall element or on a recess provided in the double wall element z. B. formed for a window or a door. The at least one pulling unit holds the formwork panel in its shuttering position against the edges, whereby it is supported on the one hand on the formwork panel and on the other hand engages between the two prefabricated wall parts and is supported on the spacer device or the support device and / or on the inside of the prefabricated wall parts.

According to a further embodiment, the wall is a building ceiling containing the opening. In its shuttering position, the shuttering panel is attached to the underside of the building ceiling by means of the at least one pulling unit. The support device contains, for. B. a beam, a beam or a steel rod or the like, which is placed on the top of the ceiling and spans the opening and to which the tension element is attached. Accordingly, even with such an opening, the pulling unit is expediently supported on the wall side on a support element which is a fixed part of the support device or is held as a separate element on the support device or itself forms the support device.

According to a preferred embodiment it is provided that the ratchet mechanism has a tensioning lever and a control cam coupled to the tensioning lever and that the tensioning lever adjusts a locking slide optionally blocking the winding shaft into an unlocking position by means of the control cam in an associated pivot position. Such unlocking of the winding shaft is carried out when the pulling rope or tensioning belt is tensioned when the shuttering device is dismantled. The actuation by means of the clamping lever requires comparatively low actuation forces.

A separation point or a separating device is expediently formed on the tension element between its tension element head and its rear tension element tensioning section, at which the rear tension element tensioning section can be separated from the front tension element head, which remains in the hardened filler concrete, in order to remove the formwork panel from its shuttering position. A separation point or a separation device can be formed such that, for. B. by excessive tensile force or shear force, the pulling element tears off at the separation point. The tension element can also, for. B. have a screw connection or the like as a separating device, so that the two parts of the tension element to be separated can be separated from one another by turning or screwing.

A bushing through which the tension element extends is preferably inserted in the panel opening in the shuttering panel. The socket, e.g. B. a plastic bushing, leads the tension element and may have other useful properties, such. B. for locking the tension element. In principle, however, the tension element can also pass through the panel opening directly.

If the bushing rests with a collar on the outer surface or the rear side of the formwork panel, it can be supported in an axially force-transmitting manner via this collar.

Furthermore, the bushing can be formed as a seal for the tension element to prevent fresh concrete from escaping. On the other hand, the bushing can contain a sealing insert which seals the tension element against the escape of fresh concrete.

The tension element head expediently contains at least one hook which hooks into or hooks onto the support device. Such a hook can be designed differently and its design can be adapted to a respective support device.

Furthermore, the tension element head can have an engagement device which, after the tension element head has been inserted into the support device, spreads apart and forms a rear hook on the support device. So that can Tension element with a small cross-sectional size are introduced into the support device and assume an enlarged cross-sectional or hooked shape therein.

Appropriately, the tension element on its tension element clamping section contains a locking profile for axial force-transmitting locking of the tension element on the socket or on a support device supported on the outside or back of the formwork panel, such as. B. a locking disc or the like.

The tension element is preferably tensile and rigid or tensile and flexible. A flexible tension element can adjust itself or bend itself if the hooking of the tension element head or the fastening of the tension cable or the tensioning belt deviates laterally or radially from the longitudinal axis of the panel opening in the formwork panel or the opening of the socket.

1. a) dass ein Zugelement einer Befestigungseinrichtung wie ein Zugseil oder ein Spanngurt an einer Befestigungsstelle an einer wandseitig angeordneten Abstützeinrichtung befestigt wird,
2. b) dass eine Dichtung oder eine abdichtende Buchse auf das Zugelement aufgesteckt wird und mittels Klemmreibungskraft in einem Abstand von der Befestigungsstelle gehalten wird, der größer ist als der Abstand zwischen der Befestigungsstelle und einer Tafelöffnung der nachfolgend in Abschalstellung angebrachten Schalungstafel, an der die Dichtung oder die Buchse zum Durchführen des Zugelements positioniert wird,
3. c) dass das Zugelement durch die Tafelöffnung der in Montagestellung beabstandet vor der abzuschalenden Öffnung angeordneten Schalungstafel hindurchgesteckt wird,
4. d) dass die Schalungstafel in ihre Abschalstellung gebracht wird,
5. e) dass die Dichtung bzw. die Buchse an der Tafelöffnung positioniert wird
   • entweder beim Hindurchstecken des Zugelementes durch die Tafelöffnung gemäß Schritt c)
   • oder beim Spannen des Zugelements durch klemmkraftbedingte Mitnahme der Dichtung bzw. der Buchse an die Tafelöffnung, und
6. f) dass das Zugelement mittels einer Spanneinrichtung gespannt wird und unmittelbar oder mittelbar an der Schalungstafel im Halteeingriff festgelegt wird.

The object is also provided by a method for shuttering openings on walls with a shuttering panel of a shuttering device to prevent fresh concrete from escaping, which method is characterized in accordance with the steps specified below,

1. a) that a tension element of a fastening device such as a tension rope or a tensioning belt is fastened to a fastening point on a support device arranged on the wall,
2. b) that a seal or a sealing bushing is plugged onto the tension element and is held at a distance from the fastening point by means of clamping friction force which is greater than the distance between the fastening point and a panel opening of the shuttering panel subsequently attached in the shuttering position on which the seal or the bushing is positioned for passing through the tension element,
3. c) that the tension element is pushed through the panel opening of the formwork panel, which is arranged in the assembly position at a distance in front of the opening to be shuttered,
4. d) that the formwork panel is brought into its shuttering position,
5. e) that the seal or the bushing is positioned at the panel opening
   • either when pushing the tension element through the panel opening according to step c)
   • or when tensioning the tension element by entrainment of the seal or the bushing against the panel opening due to the clamping force, and
6. f) that the tension element is tensioned by means of a tensioning device and is fixed directly or indirectly to the formwork panel in holding engagement.

This method enables universal shuttering by means of a tension element, which is fastened on the one hand in or on the wall in front of a shuttering surface of the shuttering panel and on the other hand, after passing through the panel opening, is tensioned and fastened directly or indirectly to the shuttering panel in the area of the panel opening. The seal or the bushing is held on the tension element, which runs through an opening in the seal or the bushing, preferably by clamping frictional force in such a way that with a higher tensile force the tension element is pulled through the seal or bushing supported on the formwork panel in the area of the panel opening can be. The seal or the bushing is pulled into its sealing position on the formwork panel or the panel opening with a certain tension force. In particular, a pull rope or a tensioning belt can be attached in a simple manner largely at will to a fastening point on a support device arranged on the wall.

Instead of attaching the seal or a sealing bushing to the tension element after the tension cable has been attached to the fastening point, the tension element can also be preconfigured with an attached seal or bushing before it is fastened to the fastening point in accordance with step a).

Fig. 1

in einer vertikalen Querschnittsansicht ein Doppelwandelement mit zwei voneinander beabstandeten Wandfertigteilen, die von einer Abstützeinrichtung voneinander beabstandet gehalten sind;

Fig. 2

in einer isometrischen Ansicht zwei Doppelwandelemente, die zur Herstellung einer Wand aufgestellt sind, wobei am vorderen Doppelwandelement eine Schalungstafel einer Abschalvorrichtung angebracht ist;

Fig. 3

in einer horizontalen Querschnittsansicht das Doppelwandelement mit dem Schalungsbrett in Abschalstellung und einem Zuganker, der an der Abstützeinrichtung eingreift;

Fig. 4

in einer isometrischen Ansicht ein Doppelwandelement mit einer Türausnehmung und einer Fensterausnehmung vor dem Abschalen;

Fig. 5

in einer isometrischen Ansicht in Explosionsdarstellung - teilweise aufgebrochen und im Schnitt - ein Doppelwandelement mit der daran anzubringenden Abschalvorrichtung;

Fig. 6

in einer weiteren isometrischen Ansicht das Doppelwandelement mit der daran anzubringenden Abschalvorrichtung der Fig. 5;

Fig. 7

in einer isometrischen Ansicht die Befestigungseinrichtung der Schalungstafel mit einem Zugseil;

Fig. 8

in einer isometrischen Ansicht eine Spanneinrichtung mit einer einen Ratschenmechanismus aufweisenden Wickeleinrichtung für das Zugseil;

Fig. 9

in einer weiteren isometrischen Ansicht die Wickeleinrichtung der Fig. 8 mit in Spannrichtung betätigtem Spannhebel;

Fig. 10

in einer Draufsicht das eine Schlaufe aufweisende Zugseil in drei Stellungen beim Befestigen an einem Element der Abstützeinrichtung;

Fig. 11

in einer Schnittansicht ein mit Frischbeton ausgegossenes Doppelwandelement mit einem im Frischbeton eingegossenen Zugseil;

Fig. 12

in einer isometrischen Ansicht ein Trägerelement mit einer daran angebrachten Schalungstafel und zwei Wickeleinrichtungen;

Fig. 13

in einer Schnittansicht die Schalungstafel mit dem Trägerelement am offenen Ende des Doppelwandelements;

Fig. 14

in einer isometrischen Ansicht die Schalungstafel der Fig. 13 an einem Doppelwandelement mit zwei aneinander gesetzten Trägerelementen mit jeweils zwei Wickeleinrichtungen;

Fig. 15

in einer isometrischen Ansicht eine U-förmige Anordnung von drei Schalungstafeln, die von drei miteinander verbundenen Trägerelementen gehalten sind;

Fig. 16

in einer isometrischen Ansicht eine Decke eines Bauwerks mit einer Öffnung, die mittels einer Abschalvorrichtung abgeschalt ist;

Fig. 17

in einer Schnittansicht die Decke der Fig. 16 mit der die Öffnung abschalenden Abschalvorrichtung; und

Fig. 18

in einer isometrischen Ansicht eine Spanneinrichtung mit einer Wickelwelle für ein Zugseil und mit einem mit der Wickelwelle gekoppelten Ratschenmechanismus.

A shuttering device according to the invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing. It shows:

Fig. 1

in a vertical cross-sectional view a double wall element with two spaced apart wall prefabricated parts, which are held at a distance from one another by a support device;

Fig. 2

in an isometric view two double wall elements which are set up to produce a wall, a formwork panel of a shuttering device being attached to the front double wall element;

Fig. 3

in a horizontal cross-sectional view the double wall element with the shuttering board in the shuttering position and a tie rod that engages the support device;

Fig. 4

in an isometric view a double wall element with a door recess and a window recess before the shuttering;

Fig. 5

in an isometric view in an exploded view - partially broken open and in section - a double wall element with the shuttering device to be attached;

Fig. 6

in a further isometric view the double wall element with the shuttering device to be attached to it Fig. 5 ;

Fig. 7

in an isometric view the fastening device of the formwork panel with a pull rope;

Fig. 8

an isometric view of a tensioning device with a winding device for the pull rope, which winding device has a ratchet mechanism;

Fig. 9

in a further isometric view the winding device of Fig. 8 with clamping lever actuated in the clamping direction;

Fig. 10

in a plan view of the pull rope having a loop in three positions when being attached to an element of the support device;

Fig. 11

in a sectional view a double wall element poured with fresh concrete with a pull rope poured into the fresh concrete;

Fig. 12

in an isometric view a carrier element with an attached formwork panel and two winding devices;

Fig. 13

in a sectional view the formwork panel with the carrier element at the open end of the double wall element;

Fig. 14

in an isometric view the formwork panel of the Fig. 13 on a double wall element with two juxtaposed support elements each with two winding devices;

Fig. 15

in an isometric view a U-shaped arrangement of three formwork panels, which are held by three interconnected support elements;

Fig. 16

in an isometric view a ceiling of a building with an opening that is shut off by means of a shuttering device;

Fig. 17

in a sectional view the ceiling of the Fig. 16 with the shuttering device shuttering the opening; and

Fig. 18

in an isometric view a tensioning device with a winding shaft for a pull rope and with a ratchet mechanism coupled to the winding shaft.

A hollow or double wall element 1 (see Fig. 1 and 4th ) is produced in a known manner as a precast concrete element in a concrete plant and at its place of use to erect a wall or wall on a base plate 2 such. B. placed on a concrete floor slab. The double wall element 1 has two flat concrete wall elements or prefabricated wall parts 3 which are spaced apart from one another and which are held by means of a support device 4 at their mutual spacing with a cavity 5 lying in between. Such a support device 4 is, for. B. a spacer which z. B. contains a wire brace and / or reinforcement. The double wall element 1 can be set up at a distance from the floor slab 2 such that a floor joint 6 is formed between a joint face 7 on the lower edge 8 of each of the two prefabricated wall parts 3 and a surface 9 of the floor slab 2.

Before the cavity 5 is poured with fresh concrete 5a (see embodiment of FIG Fig. 4 ) the two floor joints 6 are closed on the outside in order to prevent the fresh concrete to be filled into the cavity 5 of the double wall element 1 from escaping. A shuttering device for shuttering the outside of each floor joint 6 is z. B. in the DE 10 2014 013 559 A1 described.

Before the cavity 5 is poured out, a shuttering device 11 is attached to an open narrow side 10a of the double wall element 1 as the end shuttering of an opening 10 between the two opposing prefabricated wall parts 3 ( Figs. 1 to 3 ). The opening 10 on this open narrow side 10a is therefore closed by means of a concrete surface 5b formed by the precast concrete 5a ( Fig. 11 ). The wall to be formed by means of at least one double wall element 1 thereby has an end closed by the precast concrete 5a.

The shuttering device 11 or the end shuttering contains a shuttering panel 12 which, for. B. is formed by a shuttering board and is applied with a front shuttering surface 13 on the edges 14 of the two prefabricated wall parts 3, so that the opening 10 on the narrow side 10a is shut off and sealed against leakage of fresh concrete 5a filled into the cavity 5.

A fastening device 15 is provided, which holds the shuttering panel 12 in its shuttering position against the edges 14 of the two prefabricated wall parts 3. The fastening device 15 extends between the two prefabricated wall parts 3 into it and takes or engages behind at least one z. B. rod-shaped support element 16 of the support device 4 such. B. a wire brace. The support device 4 or the spacer device (in Fig. 2 not shown) can be formed with different support elements 16 such as the wire struts shown and arranged by way of example. The fastening device 15 can also be supported on the inner surfaces 17 of the two prefabricated wall parts 3 (not shown), which then also form parts of the supporting device 4.

In any case, the fastening of the formwork panel 12 is preferably carried out without support on the outer surfaces 18 of the two prefabricated wall parts 3, so that there, for. B. no drill holes for screws or the like have to be introduced.

The fastening device 15 contains at least one pulling unit 19, which has at least one elongate pulling element 19a such as, for. B. has a tie rod 19b. The formwork panel 12 includes a particularly round panel or panel opening 20 z. B. in the form of a bore into which a bushing 21 is inserted. The bushing 21 expediently contains a collar 22 which rests on the rear outer surface or panel rear 23 of the formwork panel 12 opposite the formwork surface 13.

The tension element 19a extends through a central socket opening 21a of the socket 21 and also through the panel opening 20 in the formwork panel 12. The tension element 19a or the tie rod 19b is in tension-supporting engagement with a front tension element head 24 on at least one support element 16 of the support device 4 . The tension element 19a has a rear tension element clamping section 25 which is in engagement with the formwork panel 12 so that the tension element 19a can preload the formwork panel 12 into its shuttering position. The tension element 19a has a latching profile 26 on its tension element clamping section 25, by means of which the tension element 19a can be brought into an axial force-transmitting latching on an associated latching structure in the bushing 21, the bushing 21 being attached to the formwork panel 12 via its collar 22 or axially supported on the rear side 23 of the panel. The tension element clamping section 25 can also extend up to the front when the tension element 19a is inserted Back 23 of the formwork panel 12 extend so that a latching also z. B. can be done on a perforated locking disk or the like, which is arranged on the rear side 23 and surrounds the panel opening 20, so that the tension element clamping portion 25 can be brought into engagement thereon. The handling of the pulling element 19a or the application of tensile force takes place at a rear end 27 of the pulling element 19a, which is used for manual handling, for. B. is formed with a ring or has a different design that enables handling by means of a handling device or by means of a clamping device.

The tension element 19a is formed with sufficient tensile strength for the transmission of the tension and tension forces and can be made both rigid and flexible due to the choice of material and design. The tension element 19a is z. B. formed from a metal or a tensile plastic.

The bushing 21 has a seal 28 which, as a sealing insert, seals the tension element 19a in the bushing opening 21a of the bushing 21 against the escape of fresh concrete. The bushing 21 can also itself be formed as a seal or contain an integrally formed seal and it can also seal the panel opening 20 in the formwork panel 12. Furthermore, the bushing 21 can allow a certain adjustment of the position of the tension element 19a in the radial direction, e.g. B. by a certain flexibility of the socket 21 at its socket opening 21a, for example due to the design and / or the material of the socket 21.

The tension element 19a can have a separating point or a separating device between its tension element head 24 and its tension element clamping section 25, at which the tension element 19a can be separated. A separator can, for. B. contain a screw connection or a releasable coupling. The formwork panel 12 can then be removed from its shuttering position in a simple manner with the rear section of the tension element 19a containing the tension element tensioning section 25. At least the front tension element head 24 of the tension element 19a remains in the hardened concrete.

The bushing 21 is expediently arranged in the panel opening 20 of the formwork panel 12 in such a way that it protrudes beyond the front formwork surface 13. This annular and in particular conical front section 29 of the bushing 21 then forms a pot-shaped recess 30 in the hardened concrete 5a (see FIG Fig. 11 ), which surrounds a free space around an associated section of the tension element 19a cast in the concrete 5a. After removing the shuttering panel 12 and the socket 21 and the protruding from the concrete 5a portion of the tension element 19a, this recess 30 in the concrete z. B. be filled with filler.

To remove the formwork panel 12, the rear section of the tension element 19a can be separated off in an alternative procedure, e.g. B. by means of a separator such. B. a saw. Furthermore, for example, the collar 22 of the bushing 21 is removed with a drill or countersunk drill. The formwork panel 12 can then be pulled off the socket 21 or the socket 21 is removed with the formwork panel 12. The tension element 19a can then be cut off in the recess 30.

The tension element head 24 can have different designs, such as. B. one or more hooks or even more hooks or latches that can spread open and at least one support element 16 of the support device 4 can grip behind after the tension element 19a has first been passed with its tension element head 24 between the support elements 16 and at least one support element when retracting 16 engages behind in a force-supporting manner.

In a modified embodiment (see Figures 5 to 11 ) the shuttering device 1 contains a shuttering panel 12, which is supported with its panel rear side 23 on at least one carrier element 31 of a frame shuttering 32. The frame formwork 32 contains, for. B. two opposite frame longitudinal parts 33 and the two frame longitudinal parts 33 connecting frame transverse parts 34. The carrier element 31 can be such a frame transverse part 34 or an additional part of the frame formwork 32. The formwork panel 12 is expediently attached to the entire frame formwork 32. The carrier element 31 has in particular in the middle between the two longitudinal frame parts 33 a cylindrical recess 35 ( Fig. 7 ), the z. B. of a fixed in the support member 31 bearing sleeve 36, which also z. B. can be a tube, is formed, which extends between a front wall 37 of the carrier element 31, on which the formwork panel 12 rests, and an opposite rear wall 38 of the carrier element 31. The panel opening 20 of the shuttering panel 12 is arranged essentially concentrically to the recess 35 of the carrier element 31 and in particular has a diameter which largely or identically corresponds to the diameter of the recess 35.

In the recess 35, an insert part 39 is received, which has a central cylindrical through opening 40 and z. B. as a hollow cylinder or as a part similar to a hollow cylinder, which z. B. has a plurality of circumferential ribs is formed. The insert 39 is arranged in the recess 35 essentially free of radial play. A front end 41 of the insert part 39 is arranged in the panel opening 20 of the shuttering panel 12 in such a way that its end face 42 ends at the same level as the shuttering surface 13 or is sunk into it. A rear end 43 of the insert part 39 is arranged at the same level as the rear wall 38 of the carrier element 31.

A pulling unit 19 of the fastening device 15 has a pulling cable 44 which, on the one hand, can be fixed or fixed with its front end 45 on the support device 4, which extends through the through opening 40 of the insert part 39 and which, on the other hand, can be connected or connected to a tensioning device 46 of the fastening device 15 is connected, which is supported on the rear wall 38 of the carrier element 31 and on the rear end 43 of the insert part 31. The traction cable 44 connected to the tensioning device 46 is thus indirectly supported on the formwork panel 12 via the carrier element 31.

The pull rope 44 extends through a seal 47 which is arranged at the front end 41 of the insert part 39, is supported on the insert part 39 and protrudes from the formwork panel 12. The seal 47 has a sealing body 48 in the manner of a sealing bush. The seal body 48 includes a central seal opening 49, in which the pull cord 44 is received with an exact fit and is held in particular slightly clamped, so that a relative displacement of the seal 47 with respect to the pull cord 44 is possible with a corresponding tensile force. The sealing body 48, which is preferably rotationally symmetrical with respect to the central sealing opening 49, has a front face 50, a conical annular circumferential surface 51 and a rear contact surface 52 with which the sealing body 48 rests on the insert 39. The sealing body 48 can have an annular groove 53 open towards the contact surface 52, so that the contact surface 52 is formed as an annular surface. The sealing body 48 is preferably made of a plastic such as. B. made of PVC.

The tensioning device 46 has a winding device 54, by means of which the pull rope 44 is wound up and held under pretension, so that the formwork panel 12 is pressed against the edges 14 of the prefabricated wall parts 3 by means of a tensioning force. The winding device 54 has a winding shaft 55 which is coupled to a ratchet mechanism 56. A winding shaft base body 57 of the tensioning device 46 or of the winding device 54, which supports the winding shaft 55, rests on the carrier element 31.

To shut off an opening 10 on a double wall element 1, which z. B. is located on a lateral end narrow side 10a ( Fig. 2 and Fig. 4 ) or the z. B. a door recess 10b or a window recess 10c in the double wall element 1 (see Fig. 4 ), the pull rope 44 is attached to a support element 16 of the support device 4 arranged between the two prefabricated wall parts 3. The fastening of the pull cord 44 takes place at such a fastening point that is assigned to a panel opening 20 of the shuttering panel 12 to be attached in such a way that the pulling cable 44 in its tensioned position starting from its fastening point is preferably approximately perpendicular to the shuttering panel 12 or at a small angle to the vertical Formwork panel 12 is aligned.

The pull rope 44 is preferably attached to the support device 4 in a tensile manner by means of a loop 58 (see FIG Fig. 10 ). The pull rope 44 has a Loop 59 or an eyelet at its fixing end or front end 45 which can be fixed on the support device 4. The front end 45 of the pull rope 44 is positioned with the loop 59 in a wrapping position engaging behind the support element 16 in such a way that the opposite free end 60 of the pull rope 44 can be inserted through the loop 59 and out towards the formwork panel 12 to be attached. By pulling on the free end 60 of the pull rope 44, the loop 59 attaches itself firmly to the pull rope 44 and wraps around the support element 16, so that the pull rope 44 is lashed in the wrapped position on the support element 16 and is thus fixed. The figures show the fastening of the pull rope 44 on the support device 4 or on an element 16 in a schematic and simplified representation by means of the loop 59. In principle, the loop 59 can also be attached to a free end of a support element 16 or another part of the support device 4, so that a loop is not necessary (see e.g. Figures 16 and 17 ). Furthermore, the pull rope 44 can be fastened to the support device 4 by means of a knot.

The free end 60 of the traction rope 44 is solidified or surrounded by a sheath 61 in such a way that individual fibers or wires of the traction rope 44 cannot fray at the free end 60 of the traction rope 44. Plastic fibers of the pull cord 44 can, for. B. be welded to a fixed end. The seal 47 is plugged or pushed onto the pull rope 44 at the free end 60 before the pull rope 44 with its free end 60 through the panel opening 20 in the formwork panel 12, which is positioned in an assembly position close to the opening 10 in the wall, and is guided by the support element 16 in the carrier element 31. The seal 47 is then attached to the component or the formwork surface 13 surrounding the panel opening 20, so that the seal 47 can be displaced radially to the panel opening 20 to the extent that the pull cord 44 can move radially in the panel opening 20 Sealing guaranteed. The seal 47 can, however, also be inserted in the panel opening 20 and thus assumes a position defined in relation to the panel opening 20. On the other hand, the seal 47 can also already be attached or inserted on or in the panel opening 20 before the pull cord 44 is inserted through the seal 47. Furthermore, the seal 47 placed on the insert 39 and held there in particular latched.

The formwork panel 12 is placed against the prefabricated wall parts 3 delimiting the opening 10. The free end 60 of the pull rope 44 is positioned on the winding shaft 55 of the tensioning device 46 provided in such a way that it is wound up by rotating the winding shaft 55. The pull rope 44 is wound onto the winding shaft 55 by means of the ratchet mechanism 56 until the required rope tension of the pull rope 44 is reached.

Of course, the clamping device 46 can also be attached and supported directly on the rear side 23 of the formwork panel 12.

The Fig. 12 shows a shuttering device 1 with a narrow, elongated shuttering panel 12, which is attached to only one elongated shuttering support 62 of approximately the same length. The formwork support 62 has a front wall 63 ( Fig. 13 ) with two flange sections 64 on which the formwork panel 12 rests and z. B. is fastened by screw connections 65. Two opposing side walls 66 carry a rear head region 67 which has a rear wall 68 for applying the clamping device 46. The head region 67 has a connecting device 69 which, for. B. is formed as an undercut longitudinal groove 70 sunk in the rear wall 68. The clamping device 46 is supported on the rear wall 68. Recesses 71 and 72 are formed in the front wall 63 and in the longitudinal groove 70, which are congruent with one another and with an associated panel opening 20, so that the pull cord 44 can extend straight through to the tensioning device 46. The recesses 71 and 72 are, for. B. holes or elongated holes. The formwork support 62 can also have a largely open front wall 63 which essentially only consists of the two flange sections 64.

Two formwork beams 62 which adjoin one another in the longitudinal direction (see Fig. 14 and 15th ), can be firmly connected to one another by means of a coupling part 74 that can be fixed by screws 73. The coupling part 74 is a flat strip with two Edge-side bent legs 75, which rests on the rear wall 68 and the head area 67 with the legs 75 laterally centered around. In each case one of two screws 73 is received with its screw head, which represents a sliding block, in the longitudinal groove 70 of one of the two formwork supports 62, inserted through a hole in the coupling part 74 and replaced by a lock nut 76 such. B. jammed a wing nut.

A shuttering device 1 (see Fig. 15 ) for a door recess 10b or a window recess 10c in a double wall element 1 ( Fig. 4 ) contains such a formwork panel 12 carried by a formwork support 62 in a central or horizontal arrangement and two lateral formwork panels 12, which are supported by, for example, two formwork supports 62 coupled to one another and which are each coupled to the central formwork panel 12 via an angle coupling part 77 in a right-angled orientation to this are. The angled coupling part 77 is fastened to the respective longitudinal groove 70 in accordance with the coupling part 74 described above. The shuttering device 1 of Fig. 15 can be fixed to the support device 4 of the double wall element 1 by means of the pull cords 44 and the tensioning devices 46.

A shuttering device 1 for shuttering an opening 10 in a ceiling 78 of a building or the like ( Figures 16 and 17 ) has a shuttering panel 12 which is arranged on the underside of the ceiling 79 in such a way that it switches off the opening 10 downwards. The support device 4 contains, for example, two support elements 16 in the form of two carriers with, in particular, a rectangular cross section, which are placed on the top 80 of the ceiling and span the opening 10. For example, two pull cords 44 are attached to each carrier, e.g. B. with a respective loop 59 through which the carrier extends. Each pull rope 44 extends through a panel opening 20 (not shown) sealed by the seal 47 and is pretensioned on the rear side 23 of the formwork panel 12, in this shuttering position the underside of the formwork panel 12, by means of a respective tensioning device 46. The support elements 16 or the girders do not require fastening to the top side 80 of the ceiling. Instead of the girders placed on the top side 80 of the ceiling, they can also be fixed to the top 78 Arranged support elements 16 such as reinforcing rods or the like can be provided, which are accessible in or on the opening 10 for fastening the respective pull rope 44.

The ratchet mechanism 56 of the tensioning device 46 (see Figures 6 to 9 and 18) has two ratchet wheels 81. The winding shaft 55 is rotatably supported in bores on two legs 82 of the winding shaft main body 57, which are spaced apart from one another. The two ratchet wheels 81 are arranged on the winding shaft 55 on the outside of the two legs 82 and are non-rotatably connected to the winding shaft 55. A clamping lever 83 is attached to a z. B. U-shaped bearing part 84 is attached, which has two side cheeks 85 which are pivotably mounted on the outside of the two ratchet wheels 81 on shaft journals 86 of the winding shaft 55 relative to these. A slide 87 is slidably mounted in two slots 88, which are arranged in the two side cheeks 85 of the bearing part 84 in a radial orientation relative to the winding shaft 55, and is preloaded against the two ratchet wheels 81 by means of a compression spring 89, which is supported on the bearing part 84. The slide 87 has two drivers 90 which are pretensioned into a driving engagement on the two ratchet wheels 81.

A locking slide 91 is mounted on the two legs 82 of the winding shaft base body 57 so as to be displaceable in radial alignment with respect to the winding shaft 55. The locking slide 91 is slidably received in slots 92 which are arranged parallel or inclined to a base surface 93 of the winding shaft main body 57 and in radial alignment with the winding shaft 55. In the in the Figures 6 to 8 The tensioning position of the tensioning device 46 shown in the illustration, the winding shaft 55 is oriented horizontally and the winding shaft base body 57 is supported in a vertical orientation on the rear wall 38 of the carrier element 31. In this arrangement, the locking slide 91 is arranged below the winding shaft 55. The locking slide 91 is pretensioned against the ratchet wheels 81 by means of a compression spring 94 which is supported on the winding shaft base body 57. The locking slide 91 has two locking pawls 95 which, in locking engagement with the ratchet wheels 81, lock the winding shaft 55 against rotation in the unwinding direction.

The tensioning of the tension cable 44 fixed on the winding shaft 5 takes place from an initial position of the tensioning lever 83. Such an exemplary starting position is in the Fig. 7 and 8th shown. The clamping lever 83 is pivoted into a position parallel to the formwork panel 12, in which it is arranged essentially vertically. The locking slide 91 holds, via its locking pawls 95, which are in locking engagement with the ratchet wheels 81, the winding shaft 55 locked against rotation in the unwinding direction. The slide 87 mounted on the bearing part 84 of the tensioning lever 83 is pretensioned against the ratchet wheels 81 so that its two drivers 90 are in driving engagement with the ratchet wheels 81. When the tensioning lever 83 is pivoted, the ratchet wheels 81 and the winding shaft 55 are rotated and the traction cable 44 is wound onto the winding shaft 55. The pawls 95 slide or ratchet over the ratchet wheels 81, the spring-loaded locking slide 91 executing a corresponding reciprocating compensating movement in the slots 92. The clamping lever 83 is z. B. pivoted about 90 ° (in the position of Fig. 9 ). When the clamping lever 83 is pivoted back, the pawls 95 of the locking slide 91 are in locking engagement with the ratchet wheels 81, so that the winding shaft 55 is locked against rotation in the unwinding direction, and the drivers 90 of the slide 87 slide or ratchet over the ratchet wheels 81 Pivoting the tensioning lever 83 in this way, the winding shaft 55 is rotated step by step and the pull rope 44 is wound onto the winding shaft 55 and tensioned.

To relax the pull cord 44 and to unwind the pull cord 44 from the winding shaft 55, the locking slide 91 is released from its locking engagement on the ratchet wheels 81. For this purpose, the gate valve 91 z. B. moved away from the winding shaft 55 by manual intervention in its slots 92. As an alternative to this, the locking slide 91 can be actuated or displaced by moving the tensioning lever 83. For this purpose, the two side cheeks 85 of the bearing part 84 are rounded in the area of the shaft journals 86 and each have a peripheral edge 96 ( Fig. 8 ), the radial distance from the axis of rotation 97 of the winding shaft 55 varies over the circumference. In the raised starting position of the clamping lever 83 ( Fig. 7 and 8th ) the radial distance of the peripheral edge 96 at the point that the Locking pawl 95 is opposite, less than the distance of the locking pawl 95 from the axis of rotation 97 of the winding shaft 55 in its engagement position on the ratchet wheel 81. Thus, the peripheral edge 96 is without contact with the locking pawl 95. The radial distance R _{1 of} the peripheral edge 96 remains over a circumferential angle α of z. B. about 100 ° (see Fig. 9 ) constant, so that when the clamping lever 83 is pivoted down by approximately 90 °, the locking slide 91 cannot yet be actuated beyond this pivoting neutral range of the peripheral edge 96. Following this pivoting neutral range, the radial distance from the peripheral edge 96 increases and, from a pivot angle of, for example, approximately 110 ° in a pivoting control range of the peripheral edge 96, has an increased radial distance R ₂ from the axis of rotation 97 with respect to the pawl 95. In this pivot control area, the peripheral edge 96 represents a control cam 98 which, in engagement with the locking pawl 95, moves the locking slide 91 out of its locking position into a release position. The blocking of the winding shaft 55 is thus canceled and the tension cable 44 is relaxed and can be unwound from the rotating winding shaft 55.

Before it is tensioned by means of the tensioning device 46, the pull rope 44 can be fastened to the winding shaft 55 by being wrapped around the winding shaft 55 several times and being fixed to it by frictional force while the winding shaft 55 is rotated. The winding shaft 55 can also have a slot (not shown) which radially penetrates the winding shaft 55 and through which the pull cable 44 is pushed one or more times in order to achieve an improved fixation.

The winding device 54 preferably contains a fixing device 99 (see Fig. 18 ), which fixes the pull rope 44 to the winding shaft 55 or at least supports its fixation. One embodiment of the fixing device 99 includes a z. B. strip-shaped fixing part 100, which is arranged by means of two pins 101 spaced from the circumference of the winding shaft 55 and in parallel alignment to the axis of rotation 97. The two pins 101 are mounted in bores in the winding shaft 55 radially to the axis of rotation 97. The fixing part 100 can be moved on the pin 101 radially to the winding shaft 55. The fixing part 100 is in an outer position held a stop, e.g. B. on the collar of the pin 101. The fixing part 100 can be in its outer position z. B. be biased by spring force. In the outer position, with the formation of a gap 102, the fixing part 100 is spaced from the circumference of the winding shaft 55 to such an extent that the tension cable 44 can be pushed through this gap 102 with its free end 60.

The traction cable 44, which is fed through a recess 103 in the winding shaft base body 57, rests on the winding shaft 55 and extends through the gap 102. When the winding shaft 55 rotates by means of the tensioning lever 83, the traction cable 44 initially folds over in a first position the winding shaft 55 and, with further rotation, simply in a second position and then several times in several layers on the fixing part 100. In this case, the fixing part 100 is pressed against the winding shaft 55 by the tension of the pull cable 44. The fixing part 100 thus clamps the pull rope 44 firmly on the winding shaft 55. The fixing of the pull rope 44 on the winding shaft 55 is thus effected by the clamping force of the fixing part 100 as well as by the frictional force of the pulling rope 44 wrapping around the winding shaft 55.

The pull rope 44 can also be pushed through the gap 102 several times in order to achieve an initial fixation of the pull rope 44 on the winding shaft 55. The pull cord 44 can loop around the fixing part 100 and / or at least one pin 101.

When dismantling the shuttering device, the slide 87 of the ratchet mechanism 56 is manually pulled out of its position of engagement on the ratchet wheels 81 so that the tensioning lever 83 can be pivoted down so far that the control cam 98 can push the locking slide 91 out of its engagement position on the ratchet wheels 81. When the shuttering panel 12 is removed from its shuttering position, the winding shaft 55 can be rotated by the pull cord 44 embedded in concrete on the wall, the pull cord 44 unwinding.

A tension belt is used in a manner comparable to the pull cord 44. <b> List of reference symbols </b> 1 Double wall element 23 Back of panel 2 Base plate 24 Tension element head 3rd Precast wall part 25th Tension element clamping section 4th Support device 26th Locking profiling 5 cavity 27 Rear end 5a Fresh concrete 28 poetry 5b Concrete surface 29 Front section 6th Floor joint 30th deepening 7th Joint face 31 Support element 8th Lower margin 32 Framed formwork 9 surface 33 Frame longitudinal part 10 opening 34 Frame cross section 10a Narrow side 35 Recess 10b Door recess 36 Bearing sleeve 10c Window recess 37 Front wall 11 End shuttering 38 Back wall 12th Formwork panel 39 Insert part 13th Button area 40 Through opening 14th edge 41 Front end 15th Fastening device 42 Front side 16 Support element 43 Rear end 17th Inner surface 44 Pull rope 18th Exterior surface 45 Front end 19th Traction unit 46 Clamping device 19a Tension element 47 poetry 19b Tie rod 48 Seal body 20th Panel opening 49 Sealing opening 21 Rifle 50 Face 21a Socket opening 51 Ring circumferential surface 22nd collar 52 Contact surface 53 Groove 79 Ceiling underside 54 Winding device 80 Ceiling top 55 Winding shaft 81 Ratchet wheel 56 Ratchet mechanism 82 leg 57 Winding shaft body 83 Tension lever 58 Wrap around 84 Bearing part 59 loop 85 Sidewall 60 free end 86 Shaft journal 61 Shell 87 Slider 62 Formwork beams 88 slot 63 Front wall 89 Compression spring 64 Flange section 90 Carrier 65 Screw connection 91 Gate valve 66 Side wall 92 slot 67 Head area 93 Base surface 68 Back wall 94 Compression spring 69 Connecting device 95 Pawl 70 Longitudinal groove 96 Peripheral edge 71 Recess 97 Axis of rotation 72 Recess 98 Control curve 73 screw 99 Fixing device 74 Coupling part 100 Fixing part 75 leg 101 Cones 76 Wing screw 102 gap 77 Angle coupling part 103 Recess 78 ceiling

Claims (18)

Shuttering device for shuttering openings (10) on walls with a shuttering panel (12) against the escape of fresh concrete (5a) and with a fastening device (15) that holds the shuttering panel (12) in its shuttering position at the opening (10) against the escape of the Fresh concrete (5a) filling the opening (10) holds,
characterized,
that the fastening device (15) has a pulling unit (19),
which extends through a panel opening (20) of the shuttering panel (12) and into the opening (10) and
which is supported on the one hand on a support device (4) arranged on the wall side and on the other hand can be fixed directly or indirectly to the formwork panel (12) in the retaining engagement. Shuttering device according to claim 1,
characterized in that the fastening device (15) has a tensioning device (25, 26; 46) which pretensions the pulling unit (19) in its holding engagement on the formwork panel (12). Shuttering device according to claim 1 or 2,
characterized in that the pulling unit (19) has at least one pulling element (19a), which is formed in particular by a tie rod (19b), a pulling rope (44) or a tensioning belt, or is a combination of at least two pulling elements. Shuttering device according to claim 2 or 3,
characterized in that the tensioning device (46) is a winding device (54) with a ratchet mechanism (56) for winding up the pull rope (44) or the tensioning belt. Shuttering device according to claim 4,
characterized in that the winding device (54) contains a fixing device (99) for fixing the pull rope (44) on the winding shaft (55). Shuttering device according to claim 5,
characterized in that the fixing device (99) contains a fixing part (100) which is mounted on a winding shaft (55) of the winding device (54) so as to be movable radially to the winding shaft (55), on a first position of the one placed on the winding shaft (55) The pull rope (44) rests and is covered by a second layer of the pull rope (44) placed on the rotated winding shaft (55) and is pressed against the winding shaft (55). Shuttering device according to one of Claims 3 to 6,
characterized in that the pulling element or the pulling rope (44) or the tensioning belt is attached to the support device (4) in a tensile manner by means of knotting and / or looping (58). Shuttering device according to claim 7,
characterized in that the pull rope (44) or the tensioning belt has a loop (59) or an eyelet on its front or fixing end (45) which can be fixed to the support device (4). Shuttering device according to one of Claims 3 to 8,
characterized in that the pull rope (44) has a sheath (61) which surrounds its free end (60) which can be tensioned by the tensioning device (46). Shuttering device according to one of Claims 1 to 9,
characterized in that a seal (47) on the panel opening (20) the formwork panel (12) through which the tension element (19a) extends and which seals the panel opening (20) against the escape of fresh concrete (5a). Shuttering device according to claim 10,
characterized in that the seal (47) protrudes from the shuttering surface (13) of the shuttering panel (12). Shuttering device according to one of claims 1 to 11,
characterized in that the formwork panel (12) is connected on its rear side opposite the formwork surface (13) to a carrier element (31) which has a recess (35) directed towards the panel opening (20) through which the traction unit (19) runs . Shuttering device according to claim 12,
characterized in that the recess (35) in the carrier element (31) is tubular and that a sleeve-like insert part (39) is arranged in the recess (35), the end face (42) of which is arranged at the same level as the formwork surface (13) and on which the seal (47) rests. Shuttering device according to one of claims 1 to 13,
characterized in that the wall has a double wall element (1) with two spaced apart wall prefabricated parts (3) which, by means of the support device (4) representing a spacing device, are spaced apart from one another with a cavity (5) lying between them and to be poured with fresh concrete (5a) are held, the formwork panel (12) rests with its formwork surface (13) in a peeling system against the edges (14) of the two prefabricated wall parts (3) delimiting the opening (10), the opening (10) on the narrow side of the Double wall element (1) or on a recess (10b, 10c) provided in the double wall element (1) for a window or door, and
wherein the at least one traction unit (19) has the formwork panel (12) in its Shut-off position biased against the edges (14) and
on the one hand is supported on the shuttering panel (12) and on the other hand engages between the two prefabricated wall parts (3) and is supported on the spacer device or the support device (4) and / or on the inside of the prefabricated wall parts (3). Shuttering device according to one of claims 1 to 13,
characterized in that the wall is a building ceiling (78) containing the opening (10) and
that the shuttering panel (12) is attached to the underside (79) of the building ceiling (78) in the shuttering position by means of the at least one pulling unit (19). Shuttering device according to one of claims 1 to 15,
characterized in that the pulling unit (19) is supported on the wall side on a support element (16) which - is a fixed part of the support device (4) or - Is held as a separate element on the support device (4) or - Forms the support device (4) itself. Shuttering device according to one of claims 4 to 16,
characterized in that the ratchet mechanism (56) has a tensioning lever (83) and a control cam (98) coupled to the tensioning lever (83) and that the tensioning lever (83), by means of the control cam (98) in an associated pivoting position, connects the winding shaft (55) ) optionally blocking locking slide (91) adjusted to an unlocked position. Method for shuttering openings (10) on walls with a shuttering panel (12) of a shuttering device to prevent fresh concrete (5a) from escaping,
characterized, a) that a tension element of a fastening device such as a tension cable (44) or a tension belt at a fastening point on a wall side arranged support device (4) is attached, b) that a seal (47) or a sealing bushing (21) is plugged onto the tension element and is held at a distance from the fastening point by means of clamping friction force which is greater than the distance between the fastening point and a panel opening (20) which is subsequently shown in Formwork panel (12) attached to the shuttering position, on which the seal (47) or the bushing (21) is positioned for the pulling element to pass through, c) that the tension element is pushed through the panel opening (20) of the shuttering panel (12), which is arranged in the assembly position at a distance from the opening (10) to be shuttered, d) that the shuttering panel (12) is brought into its shuttering position, e) that the seal (47) or the bushing (21) is positioned on the panel opening (20) - either when pushing the tension element through the panel opening (20) according to step c) - or when tensioning the tension element by entrainment of the seal (47) or the bushing (21) against the panel opening (20) due to the clamping force, and f) that the tension element is tensioned by means of a tensioning device (46) and is fixed directly or indirectly to the formwork panel (12) in holding engagement.

Images