WO2011082987A1

WO2011082987A1 - Clamping device and concrete formwork system having at least one clamping device

Info

Publication number: WO2011082987A1
Application number: PCT/EP2010/069610
Authority: WO
Inventors: Anton Schmied
Original assignee: Doka Industrie Gmbh
Priority date: 2009-12-17
Filing date: 2010-12-14
Publication date: 2011-07-14
Also published as: EP2513388B1; PL2513388T3; DK2513388T3; EP2513388A1; DE102009054857A1; KR20130006591A; UA111057C2; HUE027271T2

Abstract

The invention relates to a clamping device (10) for clamping together at least two concrete formwork elements arranged next to each other, having at least one holder (12) for an anchor nut (14) into which an anchor rod having a thread can be screwed. The invention further relates to a concrete formwork system having at least one clamping device and at least two concrete formwork elements having at least one opening for guiding an anchor rod through, wherein said anchor rod is designed in a frame of the concrete framework element.

Description

Clamping device and concrete formwork system

with at least one tensioning device

Technical area

The invention relates to a clamping device for

Tightening together at least two

Concrete formwork elements and a concrete formwork system with such a clamping device.

In the field of concrete construction are customary for the determination of concreted walls or the like

Shuttering elements placed opposite each other and

anchored against each other to withstand the concrete pressure. Special challenges arise here in the field of civil engineering, as on the outside of the formwork elements, ie to the ground or sheet piling out, usually cramped

Space prevail. The establishment of formwork and attaching the anchor components is significantly impeded.

State of the art

US Pat. No. 4,158,452 discloses a device with which both adjacent shuttering elements can be clamped together and an armature which has a loop at its end can be tensioned.

DE 10 2007 004 226 B3 relates to a locking device for an anchor rod of an anchor system of a

Concrete wall formwork, which is a nut element for

By screwing the anchor rod and a dome plate which can be fastened with fastening means on a rear side of a formwork element of the concrete wall formwork and a spherically shaped plate portion having an opening in which the nut member is disposed in the opening with radial clearance.

Presentation of the invention

The invention is based on the object, improved in terms of safety and / or handling

Clamping device to Hiteinanderverspannen of at least two adjacent concrete formwork elements and a concrete formwork system to provide with such a jig, in the concrete formwork elements on two sides

are arranged largely parallel to the creation of walls.

The solution to this problem is done on the one hand by the clamping device described in claim 1.

Accordingly, this has at least one holder for an anchor nut, in which a threaded anchor rod is screwed. This allows the anchoring of only one side in a novel way. At the

Setting up usually several concrete formwork elements, these are typically initially to a composite

mounted and introduced, for example, with a crane in place, in the field of civil engineering in a depression. If the opposing composite is arranged as well, an anchoring from one side can advantageously take place by means of the tensioning device according to the invention in that the threaded anchor rod of the

Machining side first inserted through the formwork element on this page, is passed through the space between the formwork elements and finally into the clamping device on the opposite side. After an anchor nut or so-called super-plate is already attached to the clamping device in this application, the anchor rod can be screwed into this without on This site requires its own work steps.

In particular, in comparison with a prior art clamping device with which an anchor can be fixed, which is provided at its ends with loops, there is the advantage that the operation and anchoring is made possible from a single page.

The clamping device according to the invention is characterized particularly versatile that they on the one hand without a

Anchor nut used as a "normal" clamping device Vierden can. At the same time, provision is made for the anchor nut to be extended by an anchor nut on the tensioning device in the form of the brackets, in order to allow a particularly secure anchoring of only one side in the situation described above. Thus, the

Handling safe and easy to the effect that not unnecessarily different types of fixtures must be kept. Rather, in the event that an anchor is to be attached to it, only the

Anchor nut be supplemented. Furthermore, the holder provided on the clamping device according to the invention is designed such that it is suitable for anchor nuts of different thicknesses and / or diameters. In addition, both

Anchor nuts in the form of so-called super plates, as well as substantially two-piece anchor nuts attachable, which consist of a so-called holding part in the form of a mostly circular plate and an example hinged thereto threaded part.

To the screwed into the thread anchor rod is still

mentioned that this one-piece with integrated

Thread as well as two or more pieces can be executed with a first separately manufactured and later attached to the actual anchor rod threaded part. By way of example, the anchor rod may be the article described in DE 20 2007 015 833 U1 of the Applicant. The anchor rods used can For example, have a diameter in the range of 15 mm to 20 mm. Adapted to this are different

Anchor nuts usual.

Preferred developments of the invention

Clamping devices are described in the further claims.

For the holder of the anchor nut is preferred that this is designed positively. This allows in

Advantageously, a certain play the anchor nut with respect to the clamping device, which for certain

Use cases, as described in more detail below, is favorable. Furthermore, a particularly good flexibility with regard to the attachment of various anchor nuts can thereby be ensured. In particular, it is preferable not to provide a non-positive holder. The preferred

interlocking holder, for example, by a releasable broadening, for example in the form of patch-mounted and secured against axial displacement

Be executed discs. The described backup against axial movement can be done for example by suitable pins or so-called linch pin.

If the anchor rod is screwed with its thread in the internal thread of the anchor nut, especially at a relatively high friction in the thread, which is not always ruled out due to the prevailing on the site pollution, to ensure that the

Rotation of the anchor nut "with" the einzurrehenden anchor rod is limited. For this purpose, it is preferable for the tensioning device according to the invention to have at least one

Torsion stop to limit a twist of the

Anchor nut has.

Similarly, it is advantageous to limit the insertion movement of the anchor rod, which can be ensured by a preferably provided anchor stop. Consequently is "felt" when screwing the armature from one side upon reaching the stop in the jig on the opposite side, that the anchor

is screwed in far enough.

It also offers advantages when the clamping device according to the invention at least one centering approach to

Determining the position of the clamping device with respect to a concrete formwork element has. Thus, the position of the clamping device according to the invention is determined on two concrete formwork elements to be clamped together, even before they are braced together. Here, the

Clamping device simultaneously with respect to

Concrete formwork elements are advantageously set so that a usable for unavoidable offset or the like free space is maintained. to

Explanation be added that the inventive

Clamping device can be used in particular in concrete formwork elements, which have a frame construction, for example of aluminum profiles, to ensure certain static advantages and in which the openings for the passage of the armature are formed in the frame and conical. The taper allows a certain

Flexibility in introducing the anchor, which is maintained by the described orientation of the clamping device with respect to the concrete formwork elements. The described mobility of the anchor at offset or

Angular skewing offers the particular advantage that the anchor is not loaded with bending moments. The

Positional relationship between the spigot and any jaws for clamping concrete formwork elements

With each other, in particular with the frame profiles of the concrete formwork elements can be tuned such that the clamping device according to the invention in all, each rotated by 90 ° orientations for bracing

Concrete formwork elements can be used. This also means, in an advantageous manner, that in the event that a certain orientation of the clamping device on two juxtaposed concrete formwork elements proves to be unfavorable because a anchorage example, because of existing reinforcement is not possible, the

Clamping device only has to be turned through 180 °, the centering attachment into the opening of the "other"

Concrete formwork element is introduced and in this

Aligning one another

Concrete formwork elements and subsequent anchoring is easily possible.

The described mobility of the anchor rod is

achieved in particular by the preferred measure, according to which the inner diameter of the spigot is greater than a thread diameter. In other words, the anchor rod screwed into the thread of an anchor nut can continue to move within the spigot within certain limits, so that offset between opposite

Concrete formwork elements can be compensated. This is facilitated by the fact that the holder provided for holding an anchor nut on the clamping device according to the invention is designed such that it allows certain movements of the anchor nut with respect to the clamping device, for example in the range of a few millimeters to a few centimeters.

Although the clamping device according to the invention, as described, already develops its advantages with the provisions for attaching an anchor nut in the form of the at least one holder, it is preferred to provide the clamping device according to the invention with at least one anchor nut

combine .

In this context, it has proved to be advantageous for the anchor nut, this for mounting on the

Clamping device according to the invention with at least one bore and / or recess, for example, at the edge of a in Essentially circular anchor nut to provide. Both the holes and recesses can be advantageously designed so that certain movements of the anchor nut with respect to the clamping device are possible, however, an accidental release is prevented. In this

Relation is an anchor nut or superplate with one or more lateral recesses, recesses or "cut outs" as an independent innovation described herein

to see that even without the features described above and below unfolds their advantages, but can be combined with it. Furthermore, it may be advantageous for static reasons, a circumferential on the outer edge of the anchor nut or superplate rib by one or more

To lead recesses around.

As already indicated, it provides for certain deviations of the positioning of two concrete formwork elements to each other in terms of angular position and / or other offset advantages when a einzudrehender anchor held over a certain angular range in a held on the jig

Anchor nut is screwed. This can be ensured in an advantageous manner, for example, that the

Anchor nut has a holding part and a threaded part, which preferably articulated and preferably ball joint on the

Holding part is stored. The holding part can be, for example, a preferably approximately circular plate which can be attached to the clamping device according to the invention.

The solution of the above object is further achieved by a concrete formwork system, the at least one tensioning device in one of the below or previously described

Has embodiments. As part of the

Concrete formwork systems are also at least two

Concrete formwork elements are provided which have at least one opening for passing an anchor rod, which is formed in a frame of a concrete formwork element. As described, the possibility of anchoring in a frame is statically advantageous.

Furthermore, in this context it offers advantages of conically forming at least one opening in order to allow certain inclinations of an anchor. The taper is preferably provided so that the opening to the outside of the

Shuttering element, so far away from the concrete to be filled out.

For the sealing on the concrete formwork element, it has also been found to be advantageous to provide the concrete formwork system according to the invention with at least one guide sleeve which at least partially in an opening of the

Shuttering element and / or can be accommodated in the clamping device. The inclusion in the jig could

For example, be provided such that the guide sleeve has an inner cavity which is substantially aligned with a thread of the anchor nut, so that an inserted anchor rod is guided to the thread. At the same time, the outer diameter of the guide sleeve may be smaller than the

Inner diameter of an opening in the frame of a

Shuttering profiles, in particular at a conical opening of the extended area and / or a

Inside diameter of a spigot. Thus be

Movements of the guide sleeve together with the anchor nut with respect to the concrete formwork element and the in it

certain position provided for clamping device.

Brief description of the drawings

The following is an example in the figures

illustrated embodiment of the invention explained in more detail. Show it:

Fig. 1 is a perspective view of

tensioning device according to the invention; and Fig. 2 is a sectional view of a profile of a

Concrete formwork element with an attached clamping device and a guide sleeve.

Detailed description of a preferred embodiment of the invention

As can be seen in Fig. 1, the clamping device according to the invention on the one hand to claws 30, of which in Fig. 1, only the left can be seen. However, the two jaws are slidable relative to each other and engage with projections provided at the ends into suitable grooves of the frames of concrete formwork elements (not shown). In addition to the displaceability with respect to each other, the claws 30 by a threaded rod 32, which in the shown

Embodiment with a so-called star grip 34 is pressed and with a on the (according to FIG. 1} left claw 30 formed semi-cylindrical nut 46 cooperates, clamped so that also arranged therebetween

Concrete formwork elements over their frames with each other

are braced.

The tensioning device 10 according to the invention is characterized by brackets 12 for an anchor nut 14. In the embodiment shown, the brackets 12 are in the form of two shafts 16, which on a plate 28 of the

Clamping device are attached. In a region of the shafts 16 remote from the plate 28 are each radial

Holes provided in the at the

Embodiment short pins 36 are introduced to limit the axial movement of the respective discs 18. It is understood, however, that these brackets can also be designed differently. For example, the pins 36 can be replaced by linch pins. In any case, the anchor nut 14, which in the embodiment shown may consist of a holding part 22 and a ball joint on it provided threaded part 24 is positively held the clamping device according to the invention. This support is flexible in the radial direction within certain limits, for example by (not recognizable)

Recesses on the edge of the holding part 22 in the radial and / or circumferential direction are formed larger than the shafts 16 of the brackets 12. The same radial mobility can be achieved in another embodiment, characterized in that the anchor nut, in particular its holding part 22 holes, which has a larger Have bores may be provided, for example, in a larger embodiment of the anchor nut, while in a smaller embodiment, the anchor nut lateral recesses may be formed.

In the embodiment shown, the threaded portion 24 of the anchor nut 14 is further provided with side wings, in cooperation with a rotational stop 26 a

Rotary movement of the threaded portion 24 of the anchor nut 14th

limit. In the embodiment shown is the

Torsion stop 26 attached to the plate 28 of the tensioning device and extends at an angle in the area in which the wings of the threaded portion can theoretically rotate. Consequently, when screwed into the threaded portion, a rotation of the threaded portion 24 is limited, so that the armature moves axially and finally against the

so-called anchor stop 20 encounters. This is in the embodiment shown to a substantially z-shaped bent flat steel, which limits the Eindrehbewegung of the armature with an aligned substantially perpendicular to the axial direction of the anchor rod end flap.

In Fig. 2, the interaction of the invention

Clamping device with a frame 38 of a

Concrete formwork element and a guide sleeve 40,

For example, made of plastic, to recognize. On the one hand, the frame of the concrete formwork element has an opening 42, which widens conically towards the outside. On the other hand, the clamping device 10, shown in the

Embodiment on the plate 28, one to the

Concrete formwork element directed centering lug 44 whose outer diameter adapted to the diameter of the opening 42. However, the inner diameter is greater than the usual diameter of an anchor rod or the internal thread of the threaded portion 24, so that certain movements within the spigot 44 are made possible. This is especially true in the presence of a guide and sealing sleeve 40 whose inner diameter is adapted to the internal thread of the threaded portion 24, and the outer diameter is slightly larger in some areas, but in the embodiment shown with this area in the holding part 22 of the anchor nut can be arranged. In the described relationships is the

Anchor nut together with the guide sleeve 40 with respect to the opening 42 and the means of the spigot 44 fixed thereto clamping device movable to

Compensate angular misalignments and misalignment.

The situation shown in Fig. 2, for example, when using the anchor according to DE 20 2007 015 833 Hl occur, which by reference to the subject matter of

present application is made. In this case, the sleeve 40 is preferably made of metal, in particular steel, and in particular suitable for receiving axial pressures. The smaller diameter of the conical portion of the armature sealingly acts against the portion of the opening 42 on the side of the scarf surface and is sealingly supported on the sleeve 40.

In conventional anchor rods, these can be used as part of the installation at a first so-called backward

Concrete formwork composite in the clamping devices described herein are screwed. Subsequently, spacer sheaths, which are mostly made of plastic or metal-fiber material, can be pushed over. A Reinforcement can be used as a whole or made on site. Subsequently, the second so-called front formwork composite is arranged, wherein the anchor in

Feedthroughs threaded and loose anchor nuts

be screwed on. If sufficient

Accessibility exists, both formwork composites and the reinforcement can be arranged and only subsequently the anchors are mounted with the described ducts.

Claims

claims

1. clamping device (10) for Zusammeneinanderverspannen of

at least two arranged side by side

Concrete formwork elements, which has at least one holder (12) for an anchor nut (14) into which a threaded anchor rod can be screwed.

2. Clamping device according to claim 1,

By doing so, that is

at least one holder (12) is designed positively.

3. Clamping device according to claim 1 or 2,

By doing so, that is

this has at least one rotational stop for limiting a rotation of the armature nut (14).

4. Clamping device according to one of the preceding claims, characterized in that e e n e c e s e s that

this has at least one anchor stop (20) for limiting a screwing movement of the anchor rod.

5. Clamping device according to one of the preceding claims, characterized in that it e e n e c e s e s that

this one centering lug (44) for determining the position of the clamping device with respect to a

Concrete formwork element has.

6. Clamping device according to claim 5,

By doing so, that is

an inner diameter of the spigot (44} is larger than an inner thread diameter of the anchor nut

7. Clamping device according to one of the preceding claims with at least one anchor nut (14).

8. Clamping device according to claim 7,

By doing so, that is

the anchor nut (14) has at least one bore and / or recess for receiving at least one holder (12).

9. Clamping device according to claim 7 or 8,

By doing so, that is

the anchor nut (14) a holding part (22) and a

Threaded portion (24), which is preferably articulated and in particular ball joint mounted on the holding part (22).

10. concrete formwork system with at least one

Tensioning device according to at least one of the preceding claims and at least two concrete formwork elements with at least one opening (42) for passing through an anchor rod, which in a frame (38) of

Concrete formwork element is formed.

11. concrete formwork system according to claim 10,

By doing so, that is

at least one opening (42) is conical.

12. concrete shuttering system according to claim 10 or 11, further comprising at least one guide sleeve (40) at least partially in an opening (42) of the

Concrete formwork element and / or in the clamping device (10) is receivable.