DE29701424U1 - Anchoring device and arrangement for shuttering the face of a ceiling - Google Patents

Description

GALGEN, SCHUMACHER & KLUIN .· ··:·:::· *··: :*

""■ ÜÜS?ELT3t)RF TSSEN PATENT ATTORNEYS

our reference: 96 267 AS/at E ss &egr;&ngr; , 23 January 1997

BETOMAX PLASTIC AND METAL PRODUCTS FACTORY GMBH & CO. KG Dyckhofstrasse 1

D-41460 Neuss

Anchoring device and arrangement for formwork of the Front side of a ceiling

The invention relates to a device and an arrangement for formwork of the front side of a ceiling which is to be placed on a building section.

When building structures in civil and structural engineering, the problem regularly arises that end formwork must be provided for a ceiling that is to be created by pouring concrete. In conventional ceiling edge formwork, formwork boards and pressure pieces in the form of squared timbers are used, which are held in place by means of clamps. To attach the clamps, holes are provided in the section of the structure that supports the ceiling, into which clamps are inserted in order to screw the formwork boards to the squared timbers. The amount of work and material required is very high, since the formwork boards have to be cut to size on site for a precise arrangement. After the concrete has set, the formwork has to be removed and the reusable individual parts have to be cleaned.

D-40239 DÜSSELDORF MULVANYSTRASSE 2 TELEPHONE 49 / 211 / 96 145 - 0 FAX 49 / 211 / 96 145 - 20

D-45133 ESSEN FRÜHLINGSTRASSE 43 A TELEPHONE 49 / 201 / 84 230 - 0 FAX 49 /201/84 230 - 20

POSTBANK COLOGNE (bank code 370 100 50) 115 211 - 504

From DE 83 08 442.8, retaining sleeves for ceiling edge formwork are known, which have an internal thread and are concreted into the section of the structure supporting the ceiling in such a way that formwork tie rods with threads can be screwed into the retaining sleeves from the outside of the wall with the formwork boards in between.

DE 31 37 549 A1 discloses ceiling edge formwork elements that have a leg that protrudes at a right angle and is attached to the building section using hooks that can be driven into it. The edge formwork elements are concreted into the ceiling, i.e. they are lost in the ceiling, so that no rework is necessary. Another advantage of this type of ceiling end formwork is that the formwork elements can also serve as thermal insulation elements.

From DE 92 18 719.6 Ul, ceiling edge formwork elements are known that include a formwork foot that protrudes at a right angle. Due to the dimensions of the formwork foot, a large-area attachment to the load-bearing masonry structure is possible, however, the relatively wide formwork feet lead to a cross-sectional weakening of the ceiling, so that the pressure that can be transferred from the ceiling to the masonry is reduced. The installation of formwork elements with legs is always almost impossible if the reinforcement is to be located as far out as possible on the ceiling edges without having to forego a concrete cover of a few centimeters.

The object of the invention is to enable the front side of a ceiling to be removed formwork quickly and practically.

In a first aspect, this object is achieved by an anchoring device for holding a formwork panel with the features specified in the characterizing part of claim 1.

The anchoring device is preferably designed in such a way that it can be concreted into the first concreting section, i.e. during the completion of the (first) building section supporting the ceiling. A fastening device can be provided on the anchoring device with which the anchoring device can be easily fastened to a wall formwork of the first building section, in particular flush with the upper edge of the first building section. As soon as the first building section is completed, the wall formwork can be removed and the reinforcement for the ceiling can be applied without any individual parts, such as those known for the frontal formwork of the ceiling, hindering the work personnel. The clamping device arranged inside the anchoring device has a relatively small surface area and is therefore easily accessible from above even after the reinforcement has been attached, so that holding elements can be inserted into the clamping device. The formwork panels used to form the front end of the ceiling are attached to or with the retaining elements.

Preferably, the anchoring device is made of plastic. The anchoring device, which can be attached to the upper edge of the first structural section in a practical manner, is of independent importance according to the invention.

In a first embodiment, the opening of the clamping device is round, so that a round rod, in particular metal or commercially available reinforcing rod, can be used as a holding element, whereby the inner diameter of the clamping device preferably tapers increasingly so that the rod can be held in a press fit.

Alternatively, the opening of the clamping device can be a slot that is arranged parallel to the side surface that has the fastening device. A flat iron with a preferably rectangular cross-section is then used as the holding element. Advantageously, the slot-shaped clamping device also forms a press fit for the flat iron.

To ensure that there is sufficient clearance when installing the retaining elements, the slot should preferably be longer (wider) than the width of the flat side of the flat iron. Projections such as barbs can be used to provide additional stabilization of the retaining elements, which can snap into the corresponding cross-sectional extensions provided at the lower end of the slot.

In a further aspect, the invention provides an arrangement for forming the front side of a ceiling to be placed on a building section with an anchoring device according to the invention, in which a formwork panel is held on the front side of the ceiling by a holding element by means of the anchoring device and the formwork panel becomes part of the ceiling, preferably after the ceiling has been concreted. In a first embodiment, the holding element has a section that can be sunk into the clamping device and a U-shaped section, the legs of the U-shaped section serving to hold the formwork panel.

The U-shaped section preferably forms a press fit for the shuttering plate. The U-shaped section is preferably designed or arranged by the position of the clamping device in such a way that, when installed, the shuttering plate is flush with the front section of the building. The U-shaped section therefore holds the shuttering plate in a form-fitting manner during the concreting of the ceiling without the shuttering plate being able to float up.

Preferably, a predetermined breaking point is provided on one leg of the U-shaped section so that after the ceiling has been concreted, the leg sections protruding from the ceiling can be easily removed.
5

In an alternative embodiment, fastening means are provided on the ceiling side of the formwork panel through which the holding elements can be inserted into the clamping device. The fastening means can be hooks, eyelets, rings, projections, wave-shaped bands and the like and can also be fastened or additionally secured after the holding elements have been inserted into the formwork panel.

In a further embodiment, a clamping device can be clamped onto the formwork plate from above to stabilize the formwork plate, or a support element that spans the formwork plate can be used. For this purpose, a thread is advantageously provided at the upper end of the holding element, onto which a clamping cone can be screwed.
20

Further advantages and embodiments of the invention will become apparent from the following description with reference to the drawing, which is intended to illustrate the inventive concept only schematically. In the drawing:
25

Fig. 1 is a perspective view of an anchoring device according to the invention;

Fig. 2 the anchoring device according to Figure 1 in side view - partially broken away;

Fig. 3 a similar anchoring device in view

from above;
35

Fig. 4 shows a first arrangement for formwork of a ceiling with an anchoring device - partly in vertical section;

Fig. 5 shows a second arrangement for formwork of a ceiling;
Fig. 6 shows a third arrangement for formwork of a ceiling;

Fig. 7 shows a fourth arrangement for formwork of a ceiling;
10

Fig. 8 shows a fifth arrangement for formwork of a ceiling;

Fig. 9 shows a sixth arrangement for forming a ceiling , wherein the reinforcements for the ceiling are already arranged;

Fig. 10 perspective view of a formwork element;

Fig. 11 shows a perspective view of another formwork element;
20

Fig. 12 a stabilizing element;

Fig. 13 an arrangement for forming a ceiling with the

Stabilizing element from Fig. 12 and
25

Fig. 14 shows another arrangement for formwork of a ceiling.

In Fig. 1, an anchoring device 50 according to a first embodiment is shown as an example, which is attached to the upper edge of a wall formwork 1, i.e. to a wall formwork that is intended for concreting a first building section, which building section is intended to support the ceiling to be concreted in a further step. The anchoring device 50 has a box-shaped housing 2, the rear side wall 4 of which, in the view shown, is flat to form a fastening surface.

is designed. The housing 2 can be attached to the wall formwork 1 quickly and easily using nails 5. The flange-like rear side wall 4 can also be additionally or exclusively glued to the wall formwork 1 or screwed, hooked or attached in another way. To improve the anchoring of the anchoring device 50 in the first building section into which the anchoring device 50 is concreted, a knob-like claw element 6, 6', 6'' is arranged at least on the front side wall 3 in the drawing. Improved anchoring can also be achieved by the shape of the anchoring element itself. For this purpose, the anchoring element could widen conically, semi-cylindrically, straight, elliptically, etc. from the rear to the front side wall (not shown).

The anchoring element 50 is fastened to the wall formwork 1 in such a way that an opening 7 located on the top side 8 of the housing 2 is exposed in the installed state with the upper edge of the wall formwork 1 or in the concreted state with the upper edge of the structural section (not shown here). To concrete the structural section, the opening 7 is closed in a suitable manner, e.g. by means of a plug (not shown).

In Fig. 2, a section through the same anchoring device 50 is shown as an example, such that the clamping device arranged inside the housing 2, designated overall by 10, can be seen in the form of a housing opening 7. The opening 7 in the embodiment according to Figs. 1 to 3 is rectangular and runs inside the housing 2 as a slot 11, which opens into a cross-sectional expansion 12 at the lower end.

As can be seen in the plan view of Fig. 3, the claw elements 6'' can also be dovetail-shaped and arranged on the other side surfaces 9', 9'' of the housing 2.
5

The use of the anchoring device according to the invention will now be explained with reference to Figures 4 to 8.

In the arrangement 100 shown in Fig. 4, the anchoring device 50 is already concreted into the structural section 120 intended to support the ceiling. The wall formwork for the concreting section 120 has already been removed in this embodiment, as well as in all subsequent embodiments. During the concreting of the anchoring device 50, the opening 7 was preferably closed with a plug (not shown) to prevent cement milk from penetrating the clamping device. The top 8 of the anchoring device 50 is flush with the top 121 of the structural section 120. To form a ceiling to be produced, a formwork plate 114 is placed on the top 121, flush with the front face 122 of the structural section 120. A holding element 130 is anchored in the clamping device 110. The holding element 130 here consists of flat iron, which is provided with holding hooks 131, which can hook into holding clamps 115j, which are formed on the side 114' of the formwork panel 114 facing the ceiling. The holding element 130 has a slight offset as a barb 132 on its lower end, which is to be inserted into the opening 7 and the clamping device 10, which can snap into an associated cross-sectional extension, as shown in Fig. 2;

When installed, the holding element 130 stabilizes the formwork panel 114 in the vertical position shown.

For this purpose, the clamping device 10 preferably forms a press fit for the retaining bracket 130. In order to have a certain amount of leeway when assembling the retaining bracket 130, the width of the opening 7 should be wider than the width of the retaining element 130 in order to be able to easily move the retaining element 130 laterally, as indicated by the arrow P in Fig. 3.

It goes without saying that several retaining elements and anchoring devices are used per shuttering panel in one building section or that several shuttering elements must be used in order to peel off the front side of the ceiling to be concreted across the entire width.

In the arrangement 200 shown in Fig. 5, the formwork panel 214 is positioned using a U-shaped holding element 230. For assembly, the U-shaped holding element 230 is inserted with a plug-in section 234 into the clamping device 10 of the anchoring device 50. The holding element 230 has a leg 233 on the ceiling side, a leg 235 located outside the ceiling and a connecting leg 236. To secure the formwork panel 214, for example, nails or other suitable securing elements can be driven into the formwork panel 214 through the leg 233 (and/or leg 235). Between the connecting leg 236 and the outer leg 235, a predetermined breaking point 237 is preferably provided so that after the ceiling has been concreted, the leg 235 can be bent downwards and easily separated.

In the arrangement 300 shown in Fig. 6, the anchoring of the shuttering plate 314 is carried out by means of retaining clamps 315 that are firmly connected to it, through which the bars 330 intended for the reinforcement are inserted and driven or hammered into the anchoring device 50. Preferably, the clamping area of the anchoring device

device 50 for the round rods 330 is tapered at least in the lower quarter and rough on the clamping surface. With these measures, the holding rod 330 is securely anchored in the clamping device of the anchoring device 50 and held in position so that the formwork plate 314 can also withstand the shear forces when concreting the ceiling.

An angled profile 341 can be used to further stabilize the formwork plate 314 against the concrete pressure> that is placed on the outside 314'' of the formwork plate 314 for stabilization and is attached to the free, i.e. upper, end of the support rod 330 by means of a plug sleeve 340 that is pushed through an opening 342 provided on the cross leg 341A of the profile 314. Alternatively, the upper free end of the round support rod 330 can also be provided with a thread onto which a wing nut, preferably available on the construction site, is screwed with the profile 314 and/or a board (not shown) in between. After the ceiling has been concreted, the plug sleeve 340 is removed or the wing screw is unscrewed so that the profile 341 can be reused. In an arrangement with plug-in sleeves, the length of the plug-in sleeves can be selected in such a way that, after the ceiling has been concreted, rods, for example railing rods, can be inserted into the space left free by the plug-in sleeve.

In the arrangement 400 shown in Fig. 7, the holding element 430 is again U-shaped. The outer leg 435 of the holding element 430 can be longer than the other leg 433 in order to achieve additional stabilization. The formwork panel 414 is placed on the first building section and the holding element 430 is inserted into the clamping device of the anchoring device 50 by means of holding clamps 415, so that the formwork panel 414 is preferably clamped in the U-shaped section.

In this arrangement, a predetermined breaking point 437 is arranged at the upper transition area between the leg 433 and the intermediate leg 436. In the arrangement 400 according to Fig. 7, the holding element can have both a round and a rectangular cross-section.

Fig. 8 shows an arrangement 500 in which the anchoring device 50 is designed as a strip or longitudinal profile and extends over a larger length of the front side of the structural section 520 supporting the ceiling to be concreted. In this embodiment, the claw element 6'' can also preferably be designed as a strip with a T-profile, dovetail-shaped profile, etc. In addition to better stabilizing the formwork plate 514, the holding element 530 can have a spring 538 that engages in a groove 517 in the formwork plate. Securing elements (not shown) such as nails, etc. can serve to further stabilize the formwork plate 515 on the holding element 530. The fastening of the strip-shaped anchoring device 50 to the wall formwork (not shown) of the structural section 521 can e.g. B. by means of side flanges 4 into which nails are driven, as described above. The formwork panels 514 can, as can be seen in Fig. 8, have dovetail-like recesses 518 or ribs with undercuts in order to increase the integration of the formwork panels into the concrete forming the ceiling. In the embodiment with strip-like anchoring devices, it is further advantageous that a relatively large amount of play remains for inserting the holding elements 530 and, due to the large insertion cross-section of the clamping device provided in the anchoring device 50, the holding elements and the formwork panels can withstand correspondingly large concrete pressures.

·

In Fig. 9, an arrangement 800 is shown in a section through a concrete ceiling to be concreted. The holding elements 830, since they are bent twice at right angles, for example, simultaneously form part of the ceiling reinforcement designated as 860, which is not explained further here. The anchoring device 50 is preferably one with a round cross-section of the clamping device. In order to be able to integrate the holding elements 830 into the ceiling reinforcement over the entire width of the ceiling, it can be practical to design the holding clamps 815 in a wave-like manner over the entire width of the shuttering panel so that the shuttering panels can be positioned as desired.

In Figs. 10 and 11, exemplary embodiments for formwork panels 614 and 714 are shown. On the lower edge of the formwork panel in the drawing, i.e. the abutting edge 619, 719 with the structural section (not shown here), additional sealing lips 62 3, 723 designed as soft zones can be provided, which on the one hand can prevent cement slurry from passing through the gap between the formwork panel and the concrete section supporting the ceiling, and on the other hand can compensate for unevenness.

The sealing lips also have advantages when producing the formwork panels, especially if these are fiber-reinforced concrete panels. When these fiber-reinforced concrete panels are extruded, the fiber-reinforced concrete is pressed, so that a certain amount of warping must be expected in the concrete panels. The sealing lips save subsequent finishing, so that the panels no longer have to be cut to size on site.

In Figs. 12 and 13, a further modification of the invention is shown, in which a triangular profile 941 is formed in an arrangement 900, which is connected to an externally threaded sleeve 940, which is provided by a thread on the transverse leg 94IA.

ing hole 942, is reusably supported on the holding element 930 anchored in the anchoring device 50. The triangular profile directs the concrete pressure acting on the formwork element 914 into the first concreting section 920.

The anchoring devices are preferably made of plastic, so that they can be easily manufactured, for example, by injection molding or extrusion. The housing of the anchoring device can be open in some places, preferably on the underside, so that the cement can fill the free cross-sections in the interior.

Alternatively, the housing can also expand, be made of fiber-reinforced concrete with an inner core and/or inserts made of elastomeric material such as plastic, be embedded in a fiber-reinforced concrete block or be designed in another way that does not limit the functionality essential to the invention.

Fig. 14 shows an arrangement 600 in which the anchoring device 50 consists only of a sleeve 634 with a wider cross-section at the bottom, into which an anchor rod can be inserted, in particular screwed, as a holding element 630. If the sleeve 634 is to fulfill a dual function and later accommodate a railing post or the like, its upper end reaches approximately to the upper edge of the ceiling to be concreted, so that the anchor rod can be removed again after the ceiling has been installed. In the case of anchor rods with an external thread, the formwork plate can be clamped from above using a wing nut 632 and a clamping piece, such as a wooden strip 636.

Claims (22)

PALGEN, SCHUMACHER & KLUIN .:....· ·...:. ..' : DÜSSELDORF ESSEN PATENT ATTORNEYS OUR REGISTRATION NO: 96 267 E s s E N , 23 January 1997 BETOMAX KÜNSTSTOFF- UND METALLWARENFABRIK GMBH & CO. KG Dyckhofstrasse 1 D - 41460 Neuss Protection claims; 1. Anchoring device for holding a formwork panel for forming the front side of a ceiling made of concrete or the like to be placed on a first building section, with a housing having several side surfaces, characterized in that in the interior of the housing (2) there is provided a clamping device (10) provided with an opening (7) and arranged essentially vertically for anchoring a holding element (30) for the shuttering plate, wherein the anchoring device (50) is so first structural section (20), in particular encased in concrete, such that the opening (7) of the clamping device (10) is exposed on the top of the section of the structure after its completion. 2. Anchoring device according to claim 1, characterized in that a fastening device is provided on one of the side surfaces (4) of the housing (2), with which the anchoring device (50) can be fastened to a front side facing the D-40239 DÜSSELDORF MULVANYSTRASSE 2 TELEPHONE 49 / 211 / 96 145 - 0 FAX 49 / 211 / 96 145 - 20 D-45133 ESSEN FRÜHLINGSTRASSE 43 A TELEPHONE 49 / 201 / 84 230 - 0 FAX 49 /201/84 230 - 20 POSTBANK COLOGNE (bank code 370 100 50) 115 211 - 504 Completion of the first building section (20) can be carried out using the wall formwork (1). 3. Anchoring device according to claim 1 or 2 j , characterized in that on at least one further side surface (3, 9', 9'') of the housing (2) a projection (6/ 6', 6'', 6''') formed with an undercut is provided on the outside. 4. Anchoring device according to one of claims 1 to 3, characterized in that the clamping device (10) has a round inner cross-section and a round rod, in particular a metal rod, can be inserted into the clamping device (10) as a holding element (30), wherein the inner diameter of the clamping device (10) tapers conically or is smaller than the outer diameter of the rod ; in order to form a press fit for the holding element (30). 5. Anchoring device according to one of claims 1 to 3, characterized in that the clamping device (10) has a slot (11) into which a flat iron can be inserted as a holding element. 6. Anchoring device according to claim 5, characterized in that the slot (il) forms a press fit for the holding element. 7. Anchoring device according to claim 5 or 6, characterized in that the slot (11) is wider than the width of the insertable flat iron 8. Anchoring device according to one of claims 1 to 7, characterized in that the housing is designed as a strip into which several holding elements can be inserted next to one another. 9. Anchoring device according to claim 8, characterized in that the slot (11) is designed as a continuous slot. 10. Anchoring device according to one of claims 1 to 9, characterized in that the opening (7) can be closed by means of a plug. 11. Anchoring device according to one of claims 1 to 10, characterized in that the clamping device (10) has a cross-sectional widening (12) in the interior, preferably at the lower end, into which a corresponding projection on the insertable holding element can snap. 12. Anchoring device according to one of claims 1 to 11, characterized in that the housing has an external cross-sectional widening, in particular a conical, elliptical or straight line. 13. Arrangement for formwork of the front side of a ceiling to be placed on a load-bearing building section, with an anchoring device according to one of claims 1 to 11, with a formwork plate for the front side, which may be lost in the ceiling after completion, in particular cast in concrete, and with a holding element for the formwork plate, characterized in that the holding element has a section (234; 434) which can be sunk into the clamping device (10) and a U-shaped section (233*235, 236; 433, 435, 436), wherein the formwork plate (214, 414) can be inserted into the U-shaped section. 14. Arrangement according to claim 13 ; characterized in that the U-shaped section forms a press fit for the formwork panel.
35 15. Arrangement according to claim 13 or 14, characterized in that the U-shaped section is designed such that in the installed state the formwork panel ends flush with the front section of the building. 16. Arrangement according to one of claims 13 to 15, characterized in that one of the legs of the U-shaped section has a predetermined breaking point (237; 437). 17. Arrangement according to the preamble of claim 13/ characterized in that the formwork panel has fastening means (115; 315; 415) on its side facing the ceiling, which engage around the holding element inserted into the clamping device (10). 18. Arrangement according to the preamble of claim 13/ characterized in that, in order to stabilize the shuttering plate, a clamping piece, such as a board, can be placed on the shuttering plate from above, which clamps the shuttering plate from above onto the first building section by means of a clamping device cooperating with the holding element; 19. Arrangement according to claim 18, characterized in that the holding element has a thread at its upper/exposed end onto which a clamping cone can be screwed. 20. Arrangement according to the preamble of claim 13/ characterized by a retaining bracket which spans the formwork panel/ is supported from the outside on the first building section; 21. Arrangement according to the preamble of claim 13/ characterized in that the formwork panel has, at least on its abutment side (619; 719) with the first building section, a soft zone extending over the length of the panel, in particular a compressible girdle or lip. 22. Arrangement according to the preamble of claim 13, characterized in that the holding elements in the clamping device (10) have countersunk barbs as projections.