HK1174674B - A concrete wall formwork - Google Patents

Description

Concrete wall form

Technical Field

The invention relates to a concrete wall formwork.

Background

Such anchoring systems are used in formwork technology in the casting of reinforced concrete constructions. The concrete form elements or, in short, form elements of the concrete wall form are each formed from a form shell and a plurality of support elements, such as longitudinal and transverse beams. The two sides of the wall are each formed by one concrete formwork element, i.e. formwork halves, which are held together by means of anchoring rods. The anchor rods are inserted through holes in the formwork shell and are fastened at their ends to the elements supporting the formwork shell in such a way that tensile forces acting on the anchor rods during the casting of the concrete are absorbed. Generally, both end portions of the anchor rod have threads to which nuts as anchoring fixtures are screwed. Thereby determining the effective length of the anchor rod and thus the strength (thickness) of the wall to which the concrete is to be cast. At the same time, the pressure exerted on the formwork shell during the casting of the fluid concrete is conducted out onto the anchoring rods via the nuts. The anchor rod is here subjected to tensile forces. Spacing elements are introduced between the formwork shells in the volume of the wall to be cast with concrete, which spacing elements are able to withstand the stresses occurring during the casting of the concrete and during the installation of the anchor rods, thereby ensuring that these stresses do not undesirably influence, i.e. reduce, the wall thickness.

In the known anchoring systems, once the formwork elements, with their formwork shells facing one another, which make up the concrete wall to be profiled, are faced with their anchoring through-holes in insufficient alignment, there are difficulties in constructing the concrete wall formwork when the anchoring rods pass through. Since the anchor rods always pass through the formwork element already erected from the outside, seen from the rear side of the first formwork element, the anchor through holes of the second formwork element cannot be seen by the formwork worker who positions the anchor rods. Although it is still relatively easy to find the last-mentioned anchorage through hole, when the anchorage through hole is poorly aligned, the anchor rod is tilted with respect to the formwork shell of the formwork element, so that it becomes difficult to find the thread of the locking means fixed on the back side of the second formwork element. In addition, in such an inclined position of the anchor rod, the locking device no longer bears completely flush against the formwork element, which results in the forces occurring during the casting of the concrete being transmitted only point by point from the concrete wall formwork to the locking device and loading the latter strongly.

A solution to the problem is proposed in DE102007004226a 1. Also disclosed herein is a concrete wall form with first and second form elements each having a form shell and an anchoring system with anchor rods and locking means, wherein the form elements face with the front faces of their form shells. The anchor rods are led through one anchoring through hole in each formwork element. In addition, an annular sealing element is provided for sealing the anchoring through-hole in the formwork housing. Each locking device for an anchor rod of an anchoring system for a concrete wall formwork has a nut element for screwing the anchor rod by means of a nut thread of the nut element and a spherical segment plate. The spherical segment plate is fixed to the rear side of one of the formwork elements of the concrete wall formwork by means of a fixing element. The spherical-segment-shaped plate has a spherically configured plate region with an opening in which a nut element is arranged with radial play, wherein the nut element has a groove-like radially encircling receptacle in which an edge of the opening in the spherical plate region is received. The one nut element of each anchoring system, which is arranged on the anchor rod tip side, has, on its end arranged on the concrete formwork side, a tubular guide means aligned with the nut thread of the nut element, which guide means serve to make it easier to find the screw-in hole of the nut thread when the anchor rod is screwed in.

However, the problem arises that, due to the inclined position of the anchor rod, an overload of the sealing element occurs, so that when the concrete is poured, fluid concrete can flow out of the unsealed points of the anchoring through-hole.

Disclosure of Invention

It is an object of the present invention to provide a locking device for an anchoring system and a concrete wall form which avoid the drawbacks of the prior art, wherein the tightness of the anchoring through-hole through which an inclined anchoring rod passes should be improved.

This object is achieved by a concrete wall form as described below. The concrete wall form according to the present invention comprises: a first and a second formwork element, each having a formwork housing, wherein the first and the second formwork element are opposite to each other with their front faces of the formwork housing; and an anchoring system with an anchoring rod; wherein the second formwork element has a locking device for an anchoring rod, the locking device comprising: -an annular sealing element for sealing the anchoring through hole in the die plate housing; -a nut element for screwing the anchor rod into the nut thread of the nut element, and-a spherical segment-shaped plate which is fixed on the rear face of the second formwork element of the concrete wall formwork and which has a spherically configured plate area with an opening in which the nut element is arranged with radial clearance; wherein the nut element has a groove-like radially encircling receptacle in which an edge of the opening in the region of the spherical plate is received; on the end of the nut element arranged on the concrete form side, a tubular guide device is provided, which is formed integrally with the nut element and is aligned with the nut thread of the nut element, with a free end into which an anchor rod to be screwed into the nut element can be inserted, the sealing element having a rubber-elastic or viscoelastic inner sealing ring, and the free end of the guide device arranged on the form element side projecting sealingly into the inner sealing ring; the free end of the guide device is flush with the outer edge of the inner sealing ring or exceeds the outer edge of the inner sealing ring on the side of the template shell; in the anchorage through-hole in the formwork housing of the first formwork element there is provided a further sealing element, identical to the sealing element of the locking device, for sealing the anchorage through-hole in the formwork housing of the first formwork element, through which further sealing element the anchor rod can pass and in the seated state of the anchor rod passes; the anchor rods extend from the rear side of the formwork housing of the first formwork element through the anchoring through-holes in the formwork housing of the first formwork element and through the sealing element; and the anchoring rod has a rounded anchoring rod tip and the anchoring rod has a first thread in an end region of the anchoring rod facing away from the anchoring rod tip and a second thread in an end region of the anchoring rod close to the anchoring rod tip; said anchor rod tapering between first and second threads toward said anchor rod tip; a thread stop is formed on the anchoring rod on the end of the second thread facing away from the anchor rod tip; the second thread of the anchoring rod can be screwed completely into the nut thread of the nut element of the locking device against a stop; and the fully screwed-in anchoring rod abuts against the free end of the guide means of the locking means.

Preferably, the thread shape of the first thread is different from the thread shape of the second thread.

Preferably, the sealing element has a metal sleeve, wherein the inner sealing ring is arranged sealingly in said metal sleeve.

Preferably, the metal sleeve has a widening which is to be arranged on the shell side of the die plate, surrounds it radially and extends radially outward.

Preferably, the sealing element has an outer ring, preferably made of hard plastic, wherein the outer ring is inserted or screwed onto the metal sleeve.

Preferably, the free end of the guide means arranged on the formwork element side rests on a radially encircling widened sealing lip of the inner sealing ring.

Preferably, the spherically configured plate region forms a spherical shell region with a spherical center point on the template element side, and the surface region of the circumferential receptacle of the nut element which rests on the spherically configured plate region is configured to be complementary to said spherically configured plate region.

Preferably, an anti-rotation device is provided on the nut element, wherein preferably the anti-rotation device has a stop element, preferably in the form of a wing, wherein by means of the stop element, a rotation of the nut element can be prevented by abutment against a stop, preferably against the fastening element.

The locking device according to the invention is suitable for fixing anchor rods of an anchoring system of a concrete wall formwork with formwork elements having a formwork shell. The locking device has: an annular sealing element for sealing the anchor through-holes in the formwork shell, a nut element for screwing the anchor rods into the nut threads of the nut element, and a spherical segment plate. The spherical segment plate can be fixed to the rear side of a formwork element of a concrete wall formwork by means of fastening elements and has a spherically configured plate region with an opening in which the nut element is arranged with radial play. The nut element has a groove-like radially encircling receptacle in which the edge of the opening in the region of the spherical plate is received. At the end of the nut element which is to be arranged on the concrete form side, a tubular guide is provided which is aligned with the nut thread of the nut element.

According to the invention, the sealing element has a rubber-elastic or viscoelastic inner sealing ring, and the free end of the guide device, which is to be arranged on the formwork element side, projects sealingly into the inner sealing ring.

In the use of the locking device according to the invention, substantially no fluid concrete can flow out between the anchoring rod and the sealing element through the anchoring through-hole. In addition, the likelihood of damaging the seal ring when the anchor rod is inserted into the guide is reduced. The asymmetrical pressure loading of the rubber-elastic inner sealing ring when the anchoring through-holes are not perfectly aligned is also reduced, since the load distribution of the forces generated by the pressure loading is made possible by the guide means which bears sealingly against the inner sealing ring. The anchor rod itself does not abut against the inner sealing ring.

This advantage is best achieved if the free end of the guide means, which is to be arranged on the formwork element side, terminates in an outer edge of the inner sealing ring, which is to be arranged on the formwork shell side, or if the free end of the guide means, which is to be arranged on the formwork element side, protrudes at the formwork shell side beyond the outer edge. This also makes it possible to use a particularly narrow inner sealing ring, i.e. an inner sealing ring with a small material thickness, which can therefore have a high elasticity overall.

It is particularly preferred that the sealing element has a metal sleeve, wherein the inner sealing ring is arranged in a sealing manner in the metal sleeve. The metal sleeve prevents the inner seal ring from being damaged and protects the inner seal ring in the introduced anchoring through-hole.

The metal sleeve very advantageously has a widening which is to be arranged on the formwork shell side, radially surrounds it and extends radially outward, thus forming a stop for limiting the positioning of the sealing element in the anchoring through-hole.

The sealing element can have an outer ring, preferably made of hard plastic, wherein the outer ring is inserted or screwed onto the metal sleeve. This also enables sealing to be achieved with respect to the formwork housing on the rear side, into which the sealing element is inserted. Furthermore, the outer sealing ring can be used for fastening the rear face.

In particular, the free end of the guide device, which is to be arranged on the formwork element side, can preferably bear against a radially encircling and widened sealing lip of the inner sealing ring. The free end of the guide can serve as a stop for the anchor rod to be screwed in.

A particularly large deflection of the nut element can be achieved if the spherically embodied plate region forms a spherical shell region with a spherical center point on the template element side, wherein the surface region of the circumferential receptacle of the nut element which bears against the spherically embodied plate region is configured to be complementary to the spherically embodied plate region.

Advantageously, a torsion-resistant device is provided on the nut element. The anti-rotation device can be realized, for example, by forming the mutually abutting surfaces of the nut element and the spherical segment plate with a high torsional friction, for example by means of a concave-convex surface. In using such a locking device, the anchoring rod may be screwed into the locking device, for example from the back side of the first formwork element, which locking device is secured to the back side of the second formwork element, without the molder having to operate the locking device on the back side of the second formwork element during screwing-in order to prevent the nut element from rotating together with the anchoring rod. Such a locking device is therefore suitable, for example, for use on inaccessible areas of a concrete formwork. The torsion-resistant device preferably has a stop element, by means of which the nut element can be prevented from twisting by abutting against a stop preferably formed by the fastening element. This ensures a particularly simple and reliable torsional protection. A stop arranged at a greater distance from the nut element can also prevent twisting if the stop element is designed as a wing. A stop element is described, for example, in DE102007004226B 3.

Another embodiment of the locking device for fastening to the formwork element to be erected first can consist in that the locking device is permanently fastened to the formwork element. This would have the advantage that no pre-assembly of the first erected formwork element is necessary.

The concrete wall formwork according to the invention comprises a first and a second formwork element each having a formwork shell and an anchoring system comprising a locking device according to the invention with an anchoring rod, wherein the formwork elements face each other with the front faces of their formwork shells. The locking device is arranged fixedly on the rear side, preferably by means of a fastening element, in the region of the anchoring through-opening in the formwork housing of the second formwork element, and the sealing element of the locking device is provided for sealing the anchoring through-opening in the formwork housing of the second formwork element. The anchor rods extend from the rear side of the formwork housing of the first formwork element through the anchor openings in the formwork housing of the first formwork element and through the sealing element and the nut thread of the nut element of the locking device according to the invention.

The free end of the guide is arranged on the formwork element side and is inserted in a sealing manner into the sealing element with an inner sealing ring, so that the free end of the guide is positioned in a defined manner on the formwork housing by means of the sealing element.

The anchor rod preferably has a rounded anchor rod tip, whereby it is easy to find the screw-in hole at the free end of the guide. The anchoring rod advantageously has a first thread in an end region of the anchoring rod facing away from the anchoring rod tip and a second thread in an end region of the anchoring rod close to the anchoring rod tip. In the area between them, the anchor rods advantageously have a smooth surface, which makes concrete adhesion difficult.

The anchor rod is very advantageously conically converging between the first and the second thread towards the anchor rod tip, so that it becomes easy to remove the anchor rod from the hardened concrete wall. The thread shape of the first thread may differ from the thread shape of the second thread, so that said thread near the anchoring tip may be designed very coarse, thereby making it easy to find the nut thread of the nut element. The anchor rod according to the invention has a stop in the region of the tip, which stop rests against the free end of the guide in the state of being screwed into the guide. The predetermined wall thickness can be easily adjusted and inaccuracies in the wall thickness of the concrete to be cast are avoided.

Very advantageously, the free end of the guide of the locking device, which is arranged on the die plate element side, is flush with the outer edge of the inner sealing ring of the sealing element, which is arranged on the die plate element side, or the free end of the guide of the locking device, which is arranged on the die plate element side, is projecting beyond the outer edge on the die plate element side. In this case, the outer edge of the inner sealing ring of the sealing element, which is arranged on the formwork element side, is substantially flush with the front side of the formwork housing of the second formwork element. This ensures that the edges of the anchoring through-hole are protected and the asymmetrical forces occurring on the inner sealing ring are distributed optimally over the width of the inner sealing ring. In this case, only the guide means bears against the inner sealing ring.

It is particularly preferred that a further sealing element, which is identical, in particular has the same inner diameter, as the sealing element of the locking device is provided for sealing the anchoring through-hole in the formwork housing of the first formwork element. Here, the anchor rod perforates the further sealing element. The conically tapering anchor rod is shaped in such a way that the maximum diameter of the conical region is adapted to the sealing element in such a way that it can be inserted in a sealing manner into the inner sealing ring of the further sealing element.

The inventive configuration of the anchoring system has the additional advantage that identical sealing elements can be used on both sides of the formwork element. This is so because the anchor rod on one side and the guide element on the other side have almost the same outer diameter in the region of the sealing element.

Drawings

The present invention will be described in detail below based on embodiments with reference to the accompanying drawings.

FIG. 1 shows a concrete wall form according to the invention in partial cross-sectional view in the region of mutually opposed, misaligned anchor holes;

fig. 2a and 2b show a locking device according to the invention in different sectional views in a position fixed on the rear side of a concrete formwork element, as a diagrammatic partial sectional view in fig. 1, wherein in fig. 2b an enlarged sectional view is shown taken from fig. 2 a;

fig. 3 shows an enlarged view of the locking device shown on the left in fig. 1.

Detailed Description

The drawings show the subject matter of the invention in a very schematic manner and are not to scale. The individual components of the subject matter of the invention are shown in such a way that their structure can be displayed well.

Fig. 2a, 2b and 3 each show a detailed view of the concrete wall formwork according to the invention shown in fig. 1, wherein a sectional view at the level of the longitudinal axis of the anchor rod 2 of the anchoring system according to the invention is shown, which connects a first and a second formwork element 5, 6 of the concrete wall formwork to one another. The formwork elements 5, 6 each have a formwork shell 7 and a longitudinal beam. The possible cross beams are not shown due to the selected pattern partial cross-section. The formwork shell 7 is usually attached, in particular riveted, to the longitudinal and transverse members. Anchor rods 2 are oriented obliquely at an angle a relative to the surface of formwork shell 7.

The sectional view in fig. 1 correspondingly extends through one longitudinal beam, so that the respective longitudinal beam is only shown by the wall 11 of the steel profile from which it is made. The formwork elements 5, 6 are arranged with their front sides of the formwork shell 7 facing each other in order to form a concrete wall to be cast. In the region of each longitudinal beam, an anchoring through-hole 13 is provided in each formwork shell 7. The anchoring rod 2 extends from the rear side of the first formwork element 5 through the anchoring through-hole 13 and the longitudinal beam, in the region of which the anchoring through-hole 13 is provided. In this case, annular sealing elements 15 are arranged or inserted in the anchoring through-hole 13, which sealing elements each surround the anchoring rod 2 in such a way that substantially no fluid can escape through the anchoring through-hole 13 when the concrete is poured. On the rear side of the formwork elements 5, 6 in the region of the anchoring through-hole 13, a locking device 20, 21 is respectively positioned. The locking means 20, 21 have a nut element 23, 24, respectively, with a nut thread, i.e. a hole with an internal thread, through which the anchor rod 2 is screwed or screwed in. In addition, the locking devices 20, 21 each have a spherical segment plate 26, 27 with a fastening element 30 for fastening the spherical segment plate 26, 27 and thus the locking device 20, 21 to the rear side of one of the formwork elements 5, 6. The fastening element 30 is formed by a hole in the edge region of the spherical segment plates 26, 27, through which a screw 32 is screwed or can be screwed into a threaded hole in the respective longitudinal beam. Clips, bayonet locks and similar clamping elements are also conceivable as technically equivalent securing elements 30. The spherical segment plates 26, 27 are made of steel plate. The spherical segment plate has a plate region of spherical design, i.e. a plate region shaped as a spherical shell region, in which an opening is provided. The spherical shell region accordingly forms a spherical center point on the template element side. That is to say, the curvature of the spherical shell region is oriented such that its center point is located in the region of the formwork elements 5, 6, to which the associated locking means 20, 21 are fastened. The center point is preferably located in the plane of the template housing.

The concave surfaces of the spherical segment plates 26, 27 are arranged with circumferential radial play toward the die plate housing 7 of the respective die plate element 5, 6. The nut elements 23, 24 of the respective locking means 20, 21 are positioned in the openings. A radially circumferential groove is provided in each of the nut elements 23, 24, which forms a receptacle 40 in which the edge of the opening in the spherical plate region of the associated spherical segment plate 26, 27 is received. The receptacle 40 has a configuration corresponding to the spherical plate region, so that the nut elements 23, 24 can be completely deflected on the spherical segment plates 26, 27 guided by the spherical segment plates 26, 27 within the radial gap. The groove can be formed, for example, by a ring 41 (fig. 2a) which forms the wall of the concrete form side and which is inserted or screwed onto the tubular region of the part of the nut element 23, 24 which is shaped as a ball nut.

In the locking device 21 according to the invention, which is positioned on the second formwork element 6, a tubular guide 45 is provided on the end of the nut element 24, which end is arranged on the concrete formwork side, which guide is aligned with the nut thread of the nut element 24. Here, for example, a sleeve-like projection which is formed on the nut element 24. The thread of the nut element 24 may run completely or partly inside the projection. The nut element 24 is here of two-part design. The nut element is formed by a sleeve-like projection which is formed integrally with the guide 45 and in which the nut thread is located, and a torsion-resistant device 60 which is screwed or slipped fixedly onto it, for example by means of a cotter pin. The anti-torque device 60 has wing elements projecting radially from the nut element so that a stop remote from the nut element 24 also prevents the nut element 24 from rotating together when the anchor rod 2 is screwed in.

As can be seen particularly well in the detail view of fig. 2b, the sealing element 15 has a rubber-elastic sealing lip 46 with a widened sealing lip, an inner sealing ring 46 and a metal sleeve 47, wherein the inner sealing ring 46 is arranged in a sealing manner in the metal sleeve 47. The free end of the guide 45, which is arranged on the formwork element side, is inserted in a sealing manner with an inner sealing ring 46 into a sealing element 15, which is arranged in the anchoring through-opening 13 of the formwork housing 7, to which the locking device 21 according to the invention is fastened. The metal sleeve 47 is provided with a radially circumferential and radially outwardly extending widening 49 arranged on the formwork shell side, which widening as a positioning aid determines the insertion depth of the sealing element 15 into the anchoring through-opening 13 and forms an edge protection.

The guide 45 is inserted into the associated sealing element 15 so far that it projects slightly beyond the outer surface of the formwork housing 7 and beyond the outer edge of the inner sealing ring 46, which is arranged on the formwork housing side and widens in a projecting manner. The projecting, protruding region is designed as a free end 51 of the guide 45. Likewise, the free end 51 of the guide 45 and the widened portion 49 of the metal sleeve 47 project slightly beyond the outer surface of the formwork shell 7.

The sealing element 15 has an outer ring 48 made of hard plastic, which is screwed onto the metal sleeve 47 from the rear side of the formwork housing 7, whereby the position of the sealing element 15 is fixed in addition to an additional rear sealing of the anchoring through-hole 13.

With its tip 50, through the anchoring rod 2 of the sealing element 15, is inserted directly into the guide 45, which is fixed to the torsion device 60. The torsion device 60 is designed as a ball-section nut. The pivot point (center point) about which the ball nut (guide 45, torsion resistance 60) can pivot, deflect or move when the anchor rod 2 is inserted is therefore located in the region of the plane of the formwork shell 7.

Furthermore, a torsion-resistant device 60 is provided on each nut element 24 of the locking device 21, which is provided on the rear side of the second formwork element 6, i.e. on the formwork element 6 through which the anchor rod 2 is inserted from the front side, i.e. from the formwork shell 7. These torsion-resistant means 60 are designed in such a way that, when the respective nut element 24 is twisted, the outer region of the nut element 24 bears against a stop, which is formed for example by the fastening element 30 of the associated spherical segment plate 27, so that the nut element 24 cannot be twisted further.

Anchor rod 2 is fully screwed in the figure. To this end, the thread 70 of the anchor rod 2 in the area of the tip 50 of the anchor rod 2 has a smaller diameter than the rest of the anchor rod 2, whereby a thread stop 52 is formed in the transition of the thread 70 to the rest of the anchor rod 2. The completely screwed-in anchor rod 2 abuts with the thread stop 52 against the free end 51 of the guide 45.

The depth of screwing of the thread 70 in the region of the tip 50 of the anchor rod 2 into the nut element 24 of the associated locking device 21 is thus predefined. The diameter of the anchor rod 2 in the area of the thread 70 is the same as seen over the length of the thread (cylindrical thread section).

The nut thread of the locking means 20, positioned on the back side of the first formwork element 5, from which the anchor rod 2 is inserted, receives an anchor rod of a larger diameter than the nut thread of the locking means 21 on the back side of the second formwork element 6. The illustrated anchor rod 2 also has, in its end region facing away from the tip 50 of the respective anchor rod, a cotter hole 75 for inserting a safety cotter pin, on which end region the locking device 20 fixed on the rear side of the first formwork element 5 is screwed. By means of the arrangement of these cotter holes 75, the wall thickness of the wall to which the concrete is to be poured can be determined. The anchor rod 2 is configured to extend conically over its entire travel, except for the thread segments configured at both ends.

In order to be able to also absorb tilting forces acting on the formwork elements 5, 6 as a result of the concrete casting process, which tilting forces lead to a reduction in the wall thickness of the wall to be cast with concrete, by means of the anchoring system shown, it is also provided in fig. 1 to fasten spherical segment plates 26, 27 to the rear faces of the formwork elements 5, 6. This fixing is finally achieved in the figure by means of the screw 32 with the integrally formed ring. Anchor rod 2 has a tapering profile towards anchor rod tip 50 in the area where it is to be positioned between formwork shells 7, so that anchor rod 2, especially when it is handled or oiled before its application on the concrete wall formwork, can be easily removed again after the poured concrete wall has hardened.

The formwork elements 5, 6 of the concrete wall formwork shown are arranged opposite each other with their anchorage through-holes 13 out of alignment. Accordingly, the nut elements 23, 24 of the locking devices 20, 21 are arranged non-centrally in the openings of the spherical plate regions of the associated spherical segment plates. Instead, the nut elements 23, 24 are deflected radially on the surface of the spherical region of the spherical segment plate in a guided manner by the respective spherical segment plate, so that the anchor rods 2 do not have to be oriented perpendicularly to the formwork shell 7 of the formwork elements 5, 6. The locking device according to the invention makes it possible to keep the obliquely extending anchor permanent and to use it several times, and this can be done on one side. The anchoring point on the side facing away from the operator can be reliably sealed, wherein the anchoring rod itself no longer presses against the sealing lip of the sealing element. The anchor rod is placed against the free end of the guide by means of a threaded stop. The sealing is achieved by the guide with the inner sealing ring of the sealing element.

There is proposed a locking device 21 for an anchor rod 2 of an anchoring system of a concrete wall formwork with a formwork element 6 having a formwork shell 7, said locking device comprising:

an annular sealing element 15 for sealing the anchoring through-hole 13 in the formwork shell 7;

a nut element 24 for screwing the anchor rod 2 into the nut thread of the nut element 24, and

a spherical segment plate 27 which can be fixed on the rear side of the formwork element 6 of the concrete wall formwork by means of the fixing element 30 and has a spherically configured plate region with an opening in which the nut element 24 is arranged with radial play, wherein the nut element 24 has a groove-like radially encircling receptacle 40 in which the edge of the opening in the spherical plate region is accommodated, and tubular guides 45 which are aligned with the nut thread of the nut element 24 are provided on the end of the nut element 24 which is to be arranged on the concrete formwork side.

The sealing element 15 has a rubber-elastic inner sealing ring 46, and the free end 51 of the guide 45, which is to be arranged on the formwork element side, is inserted into the sealing element 15 in a sealing manner with the inner sealing ring 46.

The invention is not limited to the embodiments listed above. Rather, many variants are conceivable which make use of the features of the invention even in embodiments of fundamentally different types.

Claims (12)

1. A concrete wall form comprising:

a first and a second formwork element (5, 6) each having a formwork housing (7), wherein the first and the second formwork element (5, 6) are arranged opposite one another with the front side of the formwork housing (7) thereof;

and an anchoring system with an anchoring rod (2),

wherein the second formwork element has a locking device (21) for an anchoring rod (2), the locking device comprising:

-an annular sealing element (15) for sealing the anchorage through hole (13) in the formwork shell (7);

-a nut element (24) for screwing the anchor rod (2) into the nut thread of the nut element (24), and

-a spherical segment plate (27) which is fixed on the rear side of the second formwork element (6) of the concrete wall formwork and which has a spherically configured plate region with an opening in which the nut element (24) is arranged with radial play, wherein,

the nut element (24) has a groove-like radially encircling receptacle (40) in which the edge of the opening in the region of the spherical plate is received,

at the end of the nut element (24) arranged on the concrete form side, a tubular guide means (45) is provided, which is formed integrally with the nut element (24), the tubular guide means (45) being aligned with the nut thread of the nut element (24), wherein the guide means (45) has a free end (51) into which an anchor rod (2) to be screwed into the nut element (24) can be inserted, wherein the sealing element (15) has an inner sealing ring (46) which is rubber-elastic or viscoelastic, and the free end (51) of the guide means (45) arranged on the form element side projects sealingly into the inner sealing ring (46),

wherein the free end (51) of the guide (45) is flush with the outer edge of the inner sealing ring (46) or projects beyond the outer edge of the inner sealing ring (46) on the formwork shell side,

wherein a further sealing element (15), which is identical to the sealing element (15) of the locking device (21), is provided in the anchorage through-hole (13) in the formwork housing (7) of the first formwork element (5) for sealing the anchorage through-hole (13) in the formwork housing (7) of the first formwork element (5), wherein the anchor rod (2) can be passed through the further sealing element (15) and through the further sealing element (15) in the installed state of the anchor rod (2),

wherein the anchor rods (2) extend from the rear side of the formwork housing (7) of the first formwork element (5) through the anchoring through-holes (13) in the formwork housing (7) of the first formwork element (5) and through the sealing element (15), and

the anchoring rod (2) has a rounded anchoring rod tip (50) and has a first thread (71) in an end region of the anchoring rod (2) facing away from the anchoring rod tip (50) and a second thread (70) in an end region of the anchoring rod (2) close to the anchoring rod tip,

wherein the anchor rod (2) tapers conically towards the anchor rod tip (50) between the first and the second thread (70, 71),

wherein a thread stop (52) is formed on the anchoring rod (2) on the end of the second thread (70) facing away from the anchoring rod tip,

wherein the second thread (70) of the anchor rod (2) can be screwed completely into the nut thread of the nut element (24) of the locking device (21) against a stop and

wherein the completely screwed-in anchor rod (2) rests on the free end (51) of the guide means (45) of the locking means (21).

2. A concrete wall form according to claim 1, wherein the thread form of the first thread (71) is different from the thread form of the second thread (70).

3. A concrete wall form according to claim 1, wherein the sealing element (15) has a metal sleeve (47), wherein the inner sealing ring (46) is sealingly arranged within the metal sleeve (47).

4. Concrete wall form according to claim 3, characterized in that the metal sleeve (47) has a widening (49) which is to be arranged on the shell side of the form, radially surrounds it and extends radially outwards.

5. A concrete wall form according to claim 3, wherein the sealing element (15) has an outer ring (48), wherein the outer ring (48) is inserted or screwed onto the metal sleeve (47).

6. Concrete wall form according to claim 1, characterized in that the free end (51) of the guide means (45) arranged on the form element side bears against a radially encircling widened sealing lip (46') of the inner sealing ring (46).

7. A concrete wall formwork according to claim 1, wherein the spherically configured plate region forms a spherical shell region with a spherical center point of the formwork element side, and a surface region of the circumferential receptacle (40) of the nut element (24) which bears against the spherically configured plate region is configured complementary to the spherically configured plate region.

8. A concrete wall form according to claim 1, wherein anti-torque means (60) are provided on said nut element (24).

9. Concrete wall form according to claim 8, characterized in that the torsion-resistant device (60) has a stop element, wherein a torsion of the nut element (24) is prevented by abutment against a stop by means of the stop element.

10. The concrete wall form according to claim 9, wherein the stop elements are designed as wings.

11. Concrete wall form according to claim 9, characterized in that the nut element (24) is prevented from twisting by abutment against the fixing element (30) by means of the stop element.

12. The concrete wall form of claim 5, wherein the outer ring (48) is made of hard plastic.