Formwork arrangement

Abstract

Formwork arrangement (10) comprising formwork panels (18) which have perforations (20) designed for the insertion of formwork anchors (16) of the formwork arrangement (10), which formwork panels (18) have a front (24) facing the concrete and a back (26) facing away from the concrete, and with closing elements for closing the perforations (20) not penetrated by the formwork anchors (16), characterized in that the formwork arrangement has closing plugs (22; 22a-e) designed to be inserted into the perforation (20) from the back (26) of the formwork panels (18) in order to close them.

Description

[0001] The invention relates to a formwork arrangement with formwork panels having perforations for which formwork anchors of the formwork arrangement can be inserted. The formwork anchors fix the formwork panels relative to each other and / or relative to a formwork frame. The front of the formwork panels faces the concrete, and the back faces away from it. The formwork arrangement also includes closing elements for closing the perforations not penetrated by the formwork anchors. These closing elements must be inserted into the unused perforations before the formwork arrangement with the formwork panels and formwork anchors is assembled.

[0002] One disadvantage of this known formwork arrangement is that the sealing of perforations with the sealing elements may be overlooked until the formwork panels are mounted, which can then lead to concrete leaking through the open perforations after the formwork panels have been mounted with the formwork anchors and the formwork arrangement has been filled.

[0003] The present invention aims to create a formwork arrangement that avoids the above-mentioned problem and prevents concrete from leaking out of an assembled formwork arrangement.

[0004] This problem is solved by a formwork arrangement with the features of claim 1. Advantageous embodiments of the invention are the subject of the associated claims. Advantageous embodiments of the invention are also described in the description and in the drawing.

[0005] According to the invention, the formwork assembly includes sealing plugs designed to be inserted into the perforations from the back of the formwork panels to close them. This makes it possible to close perforations that were overlooked before the formwork panels were assembled, even after assembly, when the front of the formwork panels is no longer accessible. This can be achieved by the sealing plugs according to the invention, which are designed to be inserted into the perforations from the back of the formwork panel to close them.To enable this, the sealing plugs can preferably consist at least predominantly of a polymer material possessing a certain reversible deformability. This allows the sealing plug to be inserted into the perforation from the back of the formwork panel under pressure, such that it adheres to the inner wall of the perforation by friction due to the reversible deformability of the polymer material. This is particularly important when, after the formwork assembly has been filled with concrete, the pressure of the poured concrete acts on the front of the sealing plug. For this purpose, the polymer material has a reversible deformability of at least 5%, and more specifically, at least 10%. For example, sponge rubber can be used as the material for the sealing plug.

[0006] The use of an elastic polymer material for the sealing plug also allows it to be equipped with a collar that grips the front of the formwork panel. In this case, the sealing plug must be sufficiently deformable so that the collar, which extends beyond the diameter of the perforation, can be pushed through the perforation and thus come to rest against the front of the formwork panel. The collar, which grips behind the front of the formwork panel, then secures the sealing plug against being pushed out.

[0007] In an advantageous embodiment of the invention, the sealing plug has an actuating element projecting from the back of the formwork panel to insert or remove the sealing plug from the perforation. The actuating element can, for example, be an enlarged section that is easily gripped by hand or with a tool.

[0008] In a highly advantageous embodiment of the invention, the sealing plug has a circumferential profile that interacts with a corresponding profile in the perforation of the formwork panel or a sleeve inserted therein. In this way, for example, the elastic sealing plug can be pressed or screwed into the perforation and then remains securely in place due to the interaction of the profile and corresponding profile, even when the pressure of the concrete poured into the formwork acts on the front of the formwork panel and the sealing plug. Preferably, the profile is designed as an external thread on the circumference of the sealing plug, and the corresponding profile is designed as an internal thread on the wall of the perforation facing the sealing plug.

[0009] Naturally, the cross-section of the perforation can be arbitrary, for example polygonal. Preferably, however, the perforations are circular, thus allowing for a snug fit of a threaded rod as part of the formwork anchor, as well as the insertion of the sealing plug from the back.

[0010] In an advantageous embodiment of the invention, a seal is arranged between the formwork panel and the formwork anchor in the part of the perforations penetrated by the formwork anchor. Thus, the perforations penetrated by the formwork anchors are also secured against the escape of concrete by the seal, so that the entire formwork assembly is sealed against the escape of concrete.

[0011] Preferably, the sealing plug is designed in two parts, comprising a sleeve element and an expanding element that can be inserted into the sleeve element and is designed to secure the sleeve element against the wall of the perforation. By inserting the expanding element into the sleeve element, the sealing plug can be securely held in the perforation due to the pressure exerted on the perforation and the mutual friction between the sleeve element and the perforation wall. Various embodiments are possible. The sleeve can, for example, be made of an elastic polymer material. In an alternative embodiment, the sleeve element is longitudinally slotted and thus can be forced apart.In the case of a slotted sleeve, the expanding element can, for example, be made of a rigid material such as metal, or of an elastic material which, due to its reversible deformability, presses the sleeve element firmly against the wall of the perforation, thus securing the sealing plug in the perforation. Preferably, the sleeve element and / or the expanding element consists of an elastic polymer material which is reversibly deformable by more than 5%, and in particular more than 10%.

[0012] In the formwork arrangement according to the invention, preferably a part of the perforations of the formwork panels is penetrated by the formwork anchors and the other remaining part of the perforations in the filling area of ​​the formwork arrangement is closed by the closing elements or closing plugs.

[0013] Finally, the invention also relates to a sealing plug designed to be mounted in a formwork panel of the formwork arrangement of the type mentioned above from the back of the formwork panel facing away from the concrete.

[0014] It is obvious to a person skilled in the art that the features of the embodiments described above can be combined in any way, provided that features of different embodiments do not contradict each other.

[0015] The invention is described below, for example, with reference to the schematic drawing. This drawing shows: Fig. 1 a rear view of a formwork arrangement with three formwork panels, Fig. 2 a supervision II-II from Fig. 1, Fig. 3a a detailed view III-III from Fig. 1 of an unsealed perforation, Fig. 3b a detailed view III-III from Fig. 1 with a sealing plug inserted into the perforation, which has a handle for inserting the sealing plug from the back of the formwork panel, Fig. 3c a detailed view III-III from Fig. 1 with a sealing plug having an external thread which interacts with an internal thread formed in the perforation, Fig. 3D detailed cross-sectional view III-III from Fig. 1 with a two-part sealing plug consisting of a sleeve element and an expanding element, Fig. 3e a detailed view III-III from Fig. 1 with an elastic sealing plug which has a collar that engages behind the front of the formwork panel, and Fig. 4 a detail IV from Fig. 1 with illustration of the seal between formwork anchor and formwork panel.

[0016] Fig. 1 and Fig. Figure 2 shows a formwork arrangement 10 with a front formwork wall 12 and a rear formwork wall 14, which are held at a defined distance d from each other by formwork anchors 16. Both the front formwork wall 12 and the rear formwork wall 14 consist of adjacent formwork panels 18, which have perforations 20 in their four corner regions, half of which are penetrated by the formwork anchors 16. The formwork anchors 16 consist of a threaded rod and two clamping plates 17b and 17c per formwork panel 18. The clamping plates 17b and 17c have an internal thread that engages the thread of the threaded rod 17. The two clamping plates 17b and 17c rest against the rear side 26 facing away from the concrete and the front side 24 facing the concrete of the formwork panel 18, thus securing it between them in a defined manner on the threaded rod 17a.The formwork anchor 16 passes through the perforations 20 of the formwork panels 18 in both formwork walls 12, 14, allowing their distance d to be precisely determined.

[0017] The portion of the perforations 20 not penetrated by the formwork anchors 16 is pierced with sealing plugs 22. For clarity, these sealing plugs are shown only in the front wall 12, while the perforations 20 not penetrated by the formwork anchors 16 in the rear wall 14 remain open. The sealing elements provided before assembly of the formwork assembly are not shown for clarity. The sealing plugs 22 are designed to be inserted into the perforations 20 of the fully assembled formwork panels 18 from the rear 26 of the formwork panel 18, thus closing any open perforations 20 that were overlooked before the formwork panels 18 were assembled with the formwork anchors 16.

[0018] Fig. Figure 3a shows an open perforation 20 in a formwork panel 18, as shown in Fig. 2 can be seen, for example, in the back formwork wall 14 on the formwork panels 18.

[0019] During the assembly of a formwork arrangement 10, these perforations 20 are usually closed from the front 24 of the formwork panels 18 with (not shown) closing elements before the formwork panels 18 are installed. If, after the formwork panels have been installed according to... Fig. 1 and Fig. 2. If it is determined that the sealing of some perforations 20 was overlooked before the assembly of the formwork panels 18, then, according to the invention, the sealing plugs 22 can now be inserted into the perforations 20 from the back 26 of the formwork panels 18, so that the formwork arrangement 10 can also be subsequently sealed against the escape of concrete.

[0020] Fig. Figure 3b shows a first embodiment of a sealing plug 22a made of an elastic polymer material, that is, a polymer material that is reversibly deformable by more than 5%, in particular by more than 10%. Such a sealing plug 22a has a shaft part 28, the outer circumference of which rests against the wall 30 of the perforation, and a handle part 32, which is in particular integrally connected with the shaft part 28 and serves to grip the sealing plug 22a and to insert it into the perforation 20. The shaft part 28 of the elastic closure plug 22a has a slightly larger diameter than the perforation 20, so that when the shaft part 28 is inserted into the perforation 20, it is compressed somewhat in the wall 30 of the perforation 20 and, due to its reversible deformability, bears against it under pressure, being held in place by the friction between the wall 30 and the outer circumference of the shaft part 28.Such a sealing plug 22a made of reversibly deformable polymer material, for example foam rubber, can be easily installed and removed from the back 26 after the formwork panels 18 have been mounted, when their front 24 is no longer accessible.

[0021] Fig. Figure 3c shows another embodiment of a sealing plug 22b. This sealing plug can be made of a reversibly deformable material, metal, wood, or a non-reversibly deformable plastic. It has a profile on its outer circumference 34 which interacts with a mating profile 36 on the wall 30 of the perforation 20. Such a profile can, for example, be designed as an external thread, in which case the mating profile 36 on the wall 30 of the perforation 20 is designed as an internal thread. In this way, the sealing plug 22b can be screwed into the perforation 20, for example, by means of an Allen key 40 or other actuating element arranged in the head 38 of the sealing plug 22b. The mating profile 36 need not be located in the wall 30 of the perforation 20 itself, but can be located in a sleeve that is or will be inserted into the perforation 20.Such a sleeve preferably has a collar which slightly surrounds the front of the formwork panel so that it cannot be pushed out of the perforation 20 by the concrete to be poured.

[0022] In this context, it should be noted that the perforation 20 preferably has a circular cross-section, so that it is possible to screw externally threaded sealing plugs 22b into the internal thread 36 of the perforation. The profile and the mating profile 34, 36 need not be threaded, but can also be ribbed. In this case, however, the sealing plug is made of a reversibly elastic material in order to be inserted elastically into this ribbed perforation 20.

[0023] Fig. Figure 3d shows a third embodiment of a sealing plug 22c consisting of a sleeve element 42 and an expanding element 44 that can be inserted or screwed into the sleeve element. The sleeve element 42 can be made of an elastic polymer material or of a slotted, harder material, so that the sleeve 42 can be subsequently inserted into the perforation 20. The sleeve 42 preferably has a collar 46 which engages behind the front face 24 of the formwork panel 18 in order to prevent the sleeve 42 from being forced out by the concrete pressure acting on the front face 24 of the formwork panel 18.

[0024] The expanding element 44, for example conical and / or made of an elastic material, is then pressed or screwed into the sleeve element 42. If the expanding element 44 is reversibly deformable, its diameter is preferably slightly larger than the inner diameter of the sleeve element 42, so that the expanding element 44 is compressed slightly and, due to its reversible deformability, presses the sleeve element 42 outwards against the wall 30 of the perforation. The expanding element 44 is held securely against being forced out of the sleeve element by friction and / or by a slight mutual profiling between the sleeve element 42 and the expanding element 44.

[0025] Fig. Figure 3e shows a fourth embodiment 22d of a sealing plug for application from the rear side 26 of the formwork panel. The sealing plug 22d consists of an elastic polymer material with a reversible deformability of preferably more than 5%, and in particular more than 10%. The sealing plug 22d has a shaft part 50 that is inserted into the perforation and a handle part 52 arranged at one end of the shaft part, which is preferably integrally connected with the shaft part 50, and allows the sealing plug to be pressed into the perforation 20 from the rear side 26.At the end of the shaft part 50 facing away from the handle part 52, the sealing plug 22d has an end section 48 with an increased diameter compared to the perforation 20, which engages the front side 24 of the formwork plate 18 slightly behind it, so that the sealing plug 22d is held firmly in the perforation 20, even if its shaft part 50 does not press against the wall 30 of the perforation 20 and thus cause frictional adhesion.

[0026] Finally, it shows Fig. 4 a detail IV from Fig.1 in the area where the formwork panel 18 is fixed by the formwork anchor. It is clearly visible how the front 24 and the back 26 of the formwork panel are clamped and fixed by the two clamping plates 17b and 17c. In the area of ​​the perforation 20, a clear gap remains between the outer circumference of the threaded rod 17a of the formwork anchor 16 and the wall 30 of the perforation. This gap is sealed by an elastic gasket 54, so that no concrete can escape through the perforations 20, even in the area where the formwork panels 18 are anchored. In this way, a completely sealed formwork assembly 10 or formwork wall 12, 14 is created.

[0027] The invention is not limited to the embodiments described above, but can instead be varied within the scope of protection of the attached claims. Reference symbol list: 10 Formwork arrangement 12 front formwork wall 14 rear formwork wall 16 formwork anchors 17a Threaded rod of the formwork anchor 17b rear clamping plate of the formwork anchor 17c front clamping plate of the formwork anchor 18 formwork panels 20 Perforations in the formwork panel to accommodate a formwork anchor 22, 22a-e Embodiments of sealing plugs for subsequently closing the perforation from the back of the formwork panel 24 Front side of the formwork panel facing the concrete 26. Back side of the formwork panel facing away from the concrete 28. The shaft part penetrating the perforation of a first embodiment of the closure plug 30 (Inner) wall of the perforation 32 Handle part connected to the shaft part of a first embodiment of the sealing plug 34 Profile on the outer circumference of a second embodiment of a sealing plug 36 Counter profile on the wall of the perforation or on a sleeve inserted therein 38 Head of the sealing plug 40 mm Allen key in the head of the sealing plug as an actuating element for screwing the sealing plug into the perforation 42 Sleeve element of a third embodiment of a sealing plug 44 Spreading element of the third embodiment of a sealing plug 46 collars at the front end of the sleeve for gripping behind the front of the formwork panel 48 Larger diameter end section in a fourth embodiment of the sealing plug 50 Shaft part of the sealing plug 52 Handle part of the sealing plug 54 Seal between the threaded rod of the formwork anchor and the wall of the perforation

Claims

[1] Formwork arrangement (10) comprising formwork panels (18) having perforations (20) designed for the insertion of formwork anchors (16) of the formwork arrangement (10), the formwork panels (18) having a front (24) facing the concrete and a back (26) facing away from the concrete, and with closing elements for closing the perforations (20) not penetrated by the formwork anchors (16), characterized by , that the formwork arrangement has sealing plugs (22; 22a-e) which are designed to be inserted into the perforation (20) from the rear (26) of the formwork panels (18) in order to close them. [2] Formwork arrangement (10) according to claim 1, characterized by , that the sealing plug (22; 22a-e) consists at least predominantly of a polymer material. [3] Formwork arrangement (10) according to claim 2, characterized bythat the polymer material has a reversible deformability of at least 5%, in particular at least 10%. [4] Formwork arrangement (10) according to claim 2 or 3, characterized by , that the sealing plug (22; 22a-e) surrounds the front of the formwork panel (18) with a collar. [5] Formwork arrangement (10) according to one of the preceding claims, characterized by , that the sealing plug (22; 22a-e) has an actuating element protruding from the back of the formwork plate (18) in order to insert / remove the sealing plug (22; 22a-e) into the perforation (20). [6] Formwork arrangement (10) according to one of the preceding claims, characterized by , that the sealing plug (22; 22a-e) has a circumferential profile which interacts with a counter-profile in the perforation (20) in the formwork plate (18) or a sleeve inserted therein. [7] Formwork arrangement (10) according to claim 6, characterized bythat the profile is an external thread. [8] Formwork arrangement (10) according to one of the preceding claims, characterized by , that the perforations (20) are circular. [9] Formwork arrangement (10) according to one of the preceding claims, characterized by , that in the part of the perforations (20) penetrated by the formwork anchor (16) a seal (54) is arranged between the formwork panel (18) and the formwork anchor (16). [10] Formwork arrangement (10) according to one of the preceding claims, characterized by , that the closure plug (22c) is designed in two parts, with a sleeve element (42) and a spreading element (44) which can be inserted into the sleeve element, in particular a conical one, and which is designed to fix the sleeve element (42) against the wall (30) of the perforation (20). [11] Formwork arrangement (10) according to claim 10, characterized by, that the sleeve element (42) and / or the spreading element (44) consists of elastic polymer material with a reversible deformability of more than 5%, in particular more than 10%. [12] Formwork arrangement (10) according to one of the preceding claims, in which part of the perforations (20) of the formwork panels (18) is penetrated by formwork anchors (16), and the other remaining part of the perforations (20) in the filling area of ​​the formwork arrangement (10) is closed by the closure elements and closure plugs (22; 22a-e). [13] Sealing plugs (22; 22a-e) for use in a formwork arrangement (10) according to one of the preceding claims, characterized by , that the sealing plug (22; 22a-e) is designed to be mounted from the rear side (26) of a formwork panel (18) of the formwork arrangement (10) facing away from the concrete.

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