EP0633369A1 - Arrangement for dismantling floorshutterings - Google Patents

Abstract

In order to dismantle a floor (ceiling) shuttering comprising shuttering panels (2) which are connected releasably to one another, the through-passage opening (8) can be made in said shuttering during the concreting of the floor such that, after the concrete has set, a lifting mechanism can be introduced through said through-passage opening (8) from outside the room exhibiting the floor (1) in order to grip the shuttering panels (2) located beneath the floor (1) and to lower them into the interior of the room which exhibits the concreted floor (1). <IMAGE>

Description

The invention relates to a device for striking a slab formwork with a plurality of releasably connected formwork panels which have stiffening webs or the like at their edges, also for their mutual connection, as well as passages and / or beads arranged in the edge-side stiffening webs which complement one another between adjacent formwork panels for formwork tie rods or connecting bolts, with a formwork aid for gripping the formwork panels to be stripped, which holds one or more formwork panels after they have been detached from the other formwork panels, the device having at least one hollow body or a piece of pipe for cutting out a passage opening in the ceiling concrete in continuation of the passage for a formwork tie rod and as a stripping aid at least one tension element with one end Coupling has, whose outer cross section is smaller than the inner cross section of the hollow body or pipe section.

From DE-U-19 32 015 a device is known as a stripping aid for slab formwork, in which tension elements with an end hook and hollow body are provided for the slab concrete. The traction elements with the hooks can be lowered through the hollow body by means of a winch and can attack formwork beams, which can be released from the formwork skin after they have been released. Correspondingly large hollow bodies must be provided for the passage of the hooks, which causes correspondingly large openings in the ceiling concrete. In addition, hooking on a carrier is a relatively unsafe type of fastening, which involves the risk that, for example in the event of an uneven lowering of several hooks and inclined position of the carrier assembly, one or more such hook connections are unintentionally released.

In addition, the formwork skin must also be removed and removed after removing and lowering the carrier.

From EP-A-0 105 504 A1, a device is already known with which formwork units made of assemblable formwork panels of slab formwork can be completely underneath, i.e. with formwork skin, underpinned from below by means of a hoist, released from the assembly of the slab formwork and then released. However, this requires enough space under the concrete ceiling in order to accommodate the hoist, which at the same time should enable the panel unit released from the composite formwork to be turned over. Above all, the room, the ceiling of which was shuttered, must not have small exits and the supports for the concrete ceiling must also have sufficient distances to accommodate the To give hoists. The stripping with this known device is independent of physical strength and avoids the unsafe attachment of the relatively heavy formwork panels to hooks, but is time-consuming.

It is therefore an object of the invention to provide a device of the type mentioned at the outset, which makes it easier to remove formwork from formwork and to avoid hooks encompassing the outside of formwork supports without the need for hoists to be arranged underneath the formwork formwork. The stripping should be carried out as quickly as possible practically without physical exertion and largely without risk.

To achieve this object, the device mentioned at the outset is characterized in that a coupling which engages or is attached to the formwork panel fits to the coupling and that a part which has the backing coupling in the position of use removably engages under the edge of the passage (s) on the underside of the formwork panels.

The advantage can therefore be retained that it is not necessary to install a hoist within the space having the concrete ceiling, but rather to be able to use a hoist from the outside or from above, which has openings which have been previously recessed and hollow bodies or pipe pieces arranged there with the formwork panels to be removed can be connected so that they can be released from above after their separation from the rest of the panel assembly, so no physical strength is required. If large areas are stripped with the help of a crane, that is, several still connected formwork panels are connected and lowered at the same time with the hoist, about half of the previously usual can be used in the stripping process Working time can be saved and the formwork panels can be removed altogether, i.e. with their formlining.

The passage on the formwork panel itself could be the mating coupling from the outset, but it is cheaper if formwork panels with appropriate openings can be used because they can also be used in normal concrete construction for concreting walls, i.e., conversely, formwork panels can also be used which walls are concreted, also used for slab formwork and then later easily detected and lowered from above using the device according to the invention. It is sufficient in an advantageous manner to lower the tension element with its coupling at the end through the hollow body or the pipe section in the concrete ceiling and through the passage in the panel and to connect it below the panel with the mating coupling in order to attach the panel to the hoist, whereby An unsecured fastening is only avoided with a hook that engages under a formwork support. This largely eliminates the risk of an accident.

The length of the hollow body or pipe section can be approximately equal to or less than the thickness of the ceiling to be concreted and a releasable, openable or pierceable closure can be provided for the upper end of the hollow body or pipe section in the use position. Thus, this piece of pipe does not protrude from the top of the concrete ceiling, which in itself would also be possible. This results in a passage opening in the ceiling concrete, the length of which corresponds to the thickness of the ceiling. Accordingly, the attachment elements can be inserted from above. The closure initially provided prevents concrete or dirt from clogging the passage opening during concreting. In addition, the pipe sections and their closures prevent concrete in the formwork panels pass through or these passages must be closed beforehand.

Since it is also sought with wall formwork that as few clamping points as possible are required, wall switching panels can be used for such slab formwork, the clamping points on the formwork panels now being the attachment points for a hoist when lowering. This means not only an accelerated formwork, but also a rationalization of the formwork panels to be kept in stock.

Embodiments of the tension element, in particular with regard to the coupling located at its end, are the subject of claims 3 to 5 and 8. In particular, a thread as a coupling and a counterpart with a counter thread can be anchored very quickly to a formwork panel to be stripped or the passage provided there. The coarse, rolling or trapezoidal thread according to claim 8 allows on the one hand the transmission of large forces and on the other hand represents a thread that is largely insensitive to contamination or can be easily cleaned. A pressed-on end piece with the coupling can be conveniently attached, for example, to a tension element designed as a rope or wire rope and can transmit correspondingly high forces, so that the production of this stripping aid is also simple.

The device can have a funnel-shaped deflection cone, the mouthpiece of which fits into the upper open end of the hollow body or tube piece in the position of use, the funnel-shaped extension of which continues the inner cavity of the hollow body or tube piece in the use position and whose small inner cross-section in the area of the mouthpiece is equal to or larger than that the tension element or the crane rope and its end piece with coupling. Thus the introduction of the tension element from above through the pipe section and the passage of the formwork board facilitates and, moreover, in the upper edge region of the ceiling, where the tension element slides along when the formwork panels are lowered, guidance and protection between the ceiling and tension element results. In particular, pull elements drawn at an angle by a hoist can be conveniently deflected in the insertion funnel in this way and the upper edge of the passage opening is shielded and protected against the sliding pull element.

This makes it possible to provide at least three, in particular four hollow bodies or tubular pieces, tension elements with end pieces and coupling and associated mating couplings, and in particular three or four deflecting cones for the simultaneous detection of a plurality of interconnected control panels. This allows in a simple manner to attach a plurality of formwork panels that are still connected to one another at the same time on a hoist and to lower them together, that is to accelerate the stripping process considerably.

At least three, in particular four tension elements can be connected to a cable suspension with a common suspension for attacking a crane or hoist, so that the weight forces emanating from several tension elements can finally be absorbed by a crane via a suspension.

The pipe section can consist of concrete, in particular of fiber concrete, so that it can remain within the ceiling concrete. After stripping, the inside of this pipe section can also be filled with concrete if necessary. However, it is also possible to use the openings in the ceiling for the passage of lines or, for example, with To provide threaded sleeves or the like to obtain anchor points for installations.

The pipe section can be fixable during concreting by means of a threaded bolt, preferably by means of a tie rod, the thread of which engages in an internal thread of a detachable end piece at the upper end of the pipe, preferably the closure. In this way, the upper closure of the pipe section has a double function by preventing the entry of concrete and also fixes the pipe section in its position of use together with the threaded rod, so that it is not displaced by the applied concrete. At the lower end of the threaded bolt either a head or - especially when using a tie rod - a nut can be screwed on, in which case the required length can be adjusted practically continuously and adapted to the length of the pipe section.

Overall, there is a very simple device with a few parts, which as a stripping aid allows the lowering of formwork panels from a ceiling formwork with the aid of a hoist or crane from above, so that no auxiliary hoist has to find space underneath the ceiling and no removal of the ceiling formwork panels from Hand must be done. The passage openings which can be provided in the ceiling for this purpose can be relatively small and can be treated in the same way as is the case with the passages for formwork tie rods on walls, that is to say they can subsequently be closed in a conventional manner.

Fig.1

einen Teilschnitt durch eine betonierte Decke im Bereich eines eine Durchtrittsöffnung aussparenden Rohrstückes mit den darunter befindlichen Schaltafeln und einem als Spannstab ausgebildeten Gewindebolzen zum Festlegen des Rohrstückes während des Betoniervorganges,

Fig.2

den Schnitt durch eine betonierte Decke gemäß Fig.1 nach Entfernen des Spannstabes und Einführen eines Zugelementes, welches an seinem unteren Ende eine Kupplung hat, die mit einer die Schaltafel untergreifenden Gegenkupplung verbunden ist, so daß die Schaltafeln nunmehr an dem Zugelement, bevorzugt einem Kranseil, hängen, wobei das Zugelement im Bereich der Oberseite der Decke mit Hilfe eines Umlenkkegels geführt und umgelenkt ist, so daß es zu einem Kranhaken oder dergleichen hinführt,

Fig.3

die als Ausschalhilfe dienenden Einzelteile, nämlich das Zugelement mit einem aufgepreßten Endstück mit Außengewinde als Kupplung, einer zugehörigen, das Gegengewinde enthaltenden Mutter sowie dem Umlenkkegel,

Fig.4

eine der Fig.2 entsprechende Darstellung, wobei die Schaltafeln gegenüber der betonierten Decke abgesenkt sind bzw. abgesenkt werden,

Fig.5

in schematisierter, schaubildlicher Darstellung ein größeres Deckenstück mit einem Verbund von mehreren zusammenhängenden Schaltafeln, die mit Hilfe eines Seilgehänges und vier es bildenden Zugelementen gegenüber der betonierten Decke abgesenkt sind bzw. werden sowie

Fig.6

eine der Fig.5 entsprechende Darstellung, bei welcher der Schaltafelverbund nach dem Absenken einseitig gelöst und dann erneut hochgezogen ist, so daß er nunmehr mit einem Rand auf dem Boden unterhalb der Decke aufsteht und umgewendet endgültig abgelassen werden kann.

It should also be mentioned that the pipe section could possibly also be fixed differently than by a threaded bolt supporting it inside, for example by fastening to the ceiling reinforcement. An embodiment of the invention is described below with reference to the drawing. It shows in a partially schematic representation:

Fig. 1

1 shows a partial section through a concrete ceiling in the area of a pipe section that spares a passage opening with the formwork panels underneath and a threaded bolt designed as a tensioning rod for fixing the pipe section during the concreting process,

Fig. 2

the section through a concrete ceiling according to Figure 1 after removing the tie rod and inserting a tension element, which has at its lower end a coupling which is connected to a mating coupling under the formwork panel, so that the formwork panels now on the tension element, preferably a crane cable , hang, the tension element being guided and deflected in the region of the top of the ceiling with the aid of a deflection cone, so that it leads to a crane hook or the like,

Fig. 3

the individual parts serving as stripping aids, namely the tension element with a pressed-on end piece with an external thread as a coupling, an associated nut containing the counter thread and the deflection cone,

Fig. 4

2 shows a representation corresponding to FIG. 2, the formwork panels being lowered or lowered relative to the concrete ceiling,

Fig. 5

in a schematic, diagrammatic representation of a larger piece of ceiling with a composite of several connected formwork panels, which with the help of a Rope suspension and four traction elements forming it are or will be lowered compared to the concrete ceiling

Fig. 6

a representation corresponding to FIG. 5, in which the formwork panel assembly is unilaterally loosened after lowering and then pulled up again, so that it now stands up with an edge on the floor below the ceiling and can finally be finally lowered.

For concreting a ceiling 1, a slab formwork consisting of several detachably interconnected formwork panels 2 is used, the formwork panels 2 of which have stiffening webs 3 at their edges, also for their mutual connection, for example with the aid of cross bolts, brackets or the like, and passages 4 for formwork tie rods or retaining bolts 5 exhibit. To remove the formwork, the formwork panels 2 are first of all released and lowered from the supports holding them during the concreting process and also at least partially from one another. In the exemplary embodiments, the formwork panels 2 in the edge-side stiffening webs 3 each have corresponding beads 6, which are complementary to a passage 4 between adjacent formwork panels 2, through which formwork tie rods can grip when the formwork panels 2 are used for concreting walls.

Especially in FIGS. 1 to 4, a stripping aid for detecting shuttering panels 2 to be shuttered, which is to be explained in more detail below, is shown, with which, according to FIGS. 5 and 6, a plurality of shuttering panels 2 can be held and lowered after they have been released from the rest of the panel assembly.

The entire device for striking slab formwork according to FIGS. 1 to 6 in the exemplary embodiment has a plurality of hollow bodies or pipe sections 7, hereinafter referred to as "pipe sections 7", with through openings 8 in the concrete of the slab 1 in continuation of the passages 4 for each Formwork tie rods can be left out. As a stripping aid can be seen above all in Fig. 3, but also in Fig. 2 and 4, a tension element 9 with an end coupling 10, the outer cross section of which is smaller than the inner cross section of the respective pipe section 7, so that it passes from above this passage opening 8, which corresponds to the inner cavity of the pipe section 7, can be inserted and connected to the formwork panels 2 in a manner to be described. To the coupling piece 10 fits on or attached to the formwork panels 2 or attached, to be explained in more detail below.

According to FIG. 4, it is provided that a part 11 having the counter-coupling releasably engages under the edge of the passage or passages 4, in the present case the beads 6, on the underside of the formwork panels 2.

It should be mentioned at this point that the length of the pipe section 7 is approximately equal to the thickness of the ceiling 1 to be concreted or - in the exemplary embodiment - somewhat smaller and that a detachable or openable or possibly pierceable closure 12 is provided at the upper end of the pipe section 7, which can be seen in FIG. 1 and which prevents contaminants and in particular concrete from getting into the passage opening 8, that is to say the inner longitudinal cavity of the pipe section 7, during concreting.

The traction element 9 carries at its end an end piece 13 with the coupling 10 and is designed as a crane rope for connection to a hoist or crane. So it can be mostly at training as a wire rope transfer high forces. The coupling 10 on the crane cable is in the exemplary embodiment the already mentioned end piece 13 with a thread 14, to which a mating thread in a mating piece 11 fits, so that this mating thread and the mating piece 11 practically form the previously mentioned mating coupling.

The thread 14 on the end piece 13 is an external thread according to FIG. 3, so that the counterpart 11 is a nut that can be screwed onto it. In the exemplary embodiment, this nut is also provided with an eyelet 15, so that it can be tightened, for example, with the aid of a rod inserted transversely through the eyelet 15.

An essential part of the stripping aid is a funnel-shaped deflection cone 16 shown in FIGS. 2 to 4, the mouthpiece 17 of which has the smaller cross section and fits into the upper open end of the pipe section 7 in the position of use, as can be clearly seen in FIGS. The funnel-shaped extension 18 of this deflecting cone 16, which has the actual hollow cone shape, continues the inner cavity of the hollow body or tube piece 7 in the use position upwards. The smaller internal cross section in the area of the mouthpiece 17 is equal to or larger than that of the tension element 9 or the crane cable and its end piece 13 with coupling. Thus, the crane rope with its end piece and the coupling can be inserted from above through the funnel-shaped deflection cone 16 and can be carried out to the underside of the formwork panel.

If a total of four pipe sections 7, tension elements 9 with end pieces and coupling and associated mating couplings and four deflection cones 16 are provided for the simultaneous detection of a plurality of interconnected control panels 2, as shown in FIGS. 5 and 6, the individual crane ropes or tension elements 9 are guided on the deflection cones 16 in the manner shown and combined to form a common suspension point, that is to say the four tension elements 9 can be connected to the rope suspension system shown in FIG. 5 with a common suspension 19 for attacking a crane or hoist be connected.

The pipe section 7 arranged perpendicular to the formlining 21 of the formwork panels 2 is expediently made of concrete, for example of fiber concrete, so that it can remain within the concrete ceiling 1.

In Fig.1 you can see how the pipe section 7 is fixed during concreting. For this purpose, a threaded bolt 20, expediently a tensioning rod also suitable as formwork tie rod, is provided, the thread of which engages in an internal thread of a releasable end piece, in the exemplary embodiment of the closure 12, at the upper end of the tubular piece 7 and is fastened at the lower end with a nut 22 . This threaded bolt 20 is thus fixed between the internal threads of the nut 22 and the closure 12 and thus supports the pipe section 7 from the inside in such a way that it can withstand the concrete flowing onto the slab formwork. The closure 12 thus has a double function. On the one hand it helps to fix the pipe section 7 during concreting and on the other hand it prevents unwanted blockage or contamination of the passage opening 8 located inside the pipe section 7.

With the help of the above-described device, stripping aid and the parts mentioned, it is possible to omit the concreting of the ceiling 1 in this passage openings 8 in the area of openings 4 of the formwork panels 2 and also to complete it against the concrete of the ceiling 1 during the concreting process, so that after the required setting time from above forth through the through openings 8 - via the already mentioned traction elements 9 - connected to the formwork panels 2 and these can be lowered by means of the hoist. In this case, approximately in line with the passage 4 for a formwork tie rod or bolt on the formwork panel 2 or coaxially to the edges of the passage 4, the pipe piece 7 projecting upwards in the use position, preferably oriented perpendicularly to the formlining 20, is attached and in the in FIG shown way fixed with the threaded bolt 20 and thereby the passage opening 8 is recessed during the concreting process of the ceiling 1, so that after concreting the attachment elements for the hoist through the corresponding passage openings 8 and also the passages 4 on the formwork panels 2 and on the the concrete Concrete ceiling 1 facing away from the formwork panel 2 can be connected. 1 shows the formation of the passage opening 8 with the aid of the pipe piece 7 concreted in, the connection of the formwork panel 2 to the tension element 9 can be seen in FIG. 2, which extends through the corresponding passage opening 8 and is fastened to the formwork panel 4. After the subsequent release of the formwork panels 2 from their slab formwork assembly, they can be lowered or lowered, as shown in FIGS. 4 and 5, by means of the lifting device, not shown in detail. So a hoist can be used, although such a hoist does not have to be accommodated below the concrete ceiling 1, because this hoist can be made effective with its pulling elements above the ceiling and reaches through the ceiling.

According to FIG. 5, a plurality of passage openings 8 arranged at a predetermined distance from one another are kept free in the concrete of the ceiling 1 with the aid of pipe sections 7, so that a corresponding number of attachment elements 9 are simultaneously guided through a plurality of passage openings 8 and can be connected to formwork panels 2 underneath in the manner described. According to FIGS. 5 and 6, a larger number of formwork panels 2 which initially remain connected to one another can simultaneously be released from the composite formwork and lowered together. The extensions 18 guide the traction elements that run obliquely to the attachment 19 and protect the upper edges of the passage openings 8.

Since, after such a lowering, the connecting means for the formwork panels below the formwork skin 21 would be inaccessible, it is expedient to turn over such a large-area formwork panel arrangement for its disassembly, if it should not or cannot be transported in the connected arrangement for further use.

According to FIG. 6, the assembly of a plurality of formwork panels 2 which can be lowered simultaneously can first be lowered and placed on a storage surface 23, for example the floor of the room to which the ceiling 1 belongs. Then this formwork panel assembly can be unilaterally detached from the suspension connected to the hoist, namely in the exemplary embodiment a rope suspension, then pulled up with the remaining suspension elements and hung approximately vertically, from this hanging position compared to the original formwork position, by lowering it until an edge of the formwork panel has reached the storage area 23, after which the tilted storage area is finally reached by tilting in the direction of the arrow Pf 1 and finally lowering it. In this turned position, the composite of several formwork panels 2, which was initially removed over a large area, can now be removed.

This turning process can also be carried out in an advantageous manner as in the previously described formwork process a hoist to be worked, which is located outside the closed space, which is completed by the concrete ceiling 1.

To form a slab formwork consisting of a plurality of detachably interconnected formwork panels 2, a passage opening 8 can be recessed therein during concreting of the slab so that a lifting device can be inserted from outside the room having the slab 1 after the concrete has set through this passage opening 8 can, in order to detect the formwork panels 2 located under the ceiling 1 and to lower them into the interior of the room having the concrete ceiling 1.

Claims (11)

Device for striking a slab formwork with a plurality of formwork panels (2) detachably connected to one another, which have stiffening webs or the like at their edges, also for their mutual connection, as well as passages and / or arranged in the edge-side stiffening webs (3) to form a passage (4) have additional beads (6) for formwork tie rods or connecting bolts between adjacent formwork panels (2), with a stripping aid for gripping the formwork panels (2) to be stripped, which holds one or more formwork panels (2) after they have been detached from the other formwork panels, the device at least a hollow body or a piece of pipe (7) for recessing a passage opening (8) in the ceiling concrete in continuation of the passage (4) for a formwork tie rod and as a stripping aid has at least one tension element (9) with an end coupling (10), the outer cross section of which is smaller than the internal cross section of the hollow body or pipe section ( 7), characterized in that for the coupling (10) a mating coupling which engages or is attached to the formwork panel (2) and that a part (11) having the mating coupling in the position of use has the edge of the passage (s) (4) on the underside underneath the formwork panels (2). Apparatus according to claim 1, characterized in that the length of the hollow body or pipe section (7) is approximately equal to or less than the thickness of the ceiling (1) to be concreted and that a releasable, openable or pierceable closure (12) for the upper end in the use position of the hollow body or pipe section (7) is provided. Device according to claim 1 or 2, characterized in that the pulling element (9) carries at its end a preferably pressed-on end piece (13) with the coupling (10) and is designed in particular as a crane cable for connection to a hoist or crane. Device according to one of claims 1 to 3, characterized in that the coupling (10) on the crane cable is an end piece (13) with a thread (14) to which a counterpart (11) with a counter thread fits, which counterpart (11 ) under or overlaps the through opening for a formwork tie rod on the formwork panel (s) in the position of use. Device according to claim 4, characterized in that the thread (14) on the end piece (13) is an external thread and the counterpart (11) is a screw-on nut. Device according to one of claims 1 to 5, characterized in that it has a funnel-shaped deflection cone (16), the mouthpiece (17) of which fits into the upper open end of the hollow body or tubular piece (7) in the use position, the funnel-shaped extension (18) of which Continues the inner cavity of the hollow body or pipe section (7) in the use position upwards and its small internal cross section in the area of the mouthpiece (17) is equal to or larger than that of the tension element (9) or the crane rope and its end piece with coupling. Device according to one of claims 1 to 6, characterized in that at least three, in particular four hollow bodies or tubular pieces (7), tension elements (9) with end piece and coupling and associated mating couplings, and in particular three or four deflection cones (16) for simultaneous detection of several interconnected formwork panels (2) are provided. Device according to one of claims 1 to 7, characterized in that the coupling on the crane cable is a coarse, rolling or trapezoidal thread. Device according to one of claims 1 to 8, characterized in that at least three, in particular four tension elements (9) are connected to form a cable suspension with a common suspension (19) for attacking a crane or hoist. Device according to one of claims 1 to 9, characterized in that the pipe section (7) consists of concrete, in particular of fiber concrete. Device according to one of claims 1 to 10, characterized in that the pipe section (7) remaining in particular within the ceiling (1) during concreting by means of a threaded bolt (20), preferably by means of a tension rod usable as formwork tie rod, the thread of which is screwed into an internal thread of a Detachable end piece engages at the upper end of the pipe section (7), preferably the closure (12), can be fixed.

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