阅读说明：本技术 模板元件和模板组合构件 (Formwork element and formwork combination member ) 是由 U·黑格里希 B·库尔特 于 2020-02-18 设计创作，主要内容包括：本发明涉及混凝土模板结构的技术领域的改进。此外,作为改进提出了模板元件(1),其框架(3)由扁钢制成,而模板元件(1)的支撑部(4)由型钢制成。(The present invention relates to improvements in the technical field of concrete formwork construction. In addition, a formwork element (1) is proposed as a development, the frame (3) of which is made of flat steel, while the support (4) of the formwork element (1) is made of profiled steel.)

1. Formwork element (1) having a formwork skin (2), a frame (3) carrying the formwork skin and a support (4) arranged inside the frame (3) and supporting the formwork skin (2), characterized in that the frame (3) is made of flat steel without a profile and the support (4) is made of open-type steel.

2. Formwork element (1) according to claim 1, characterized in that the profile steel is open towards the formwork skin (2) and/or the profile steel has a symmetrical profile, in particular a hat-shaped profile, and/or the profile steel has at least one longitudinal groove (14) on its top side (13).

3. Formwork element (1) according to one of the preceding claims, having a formwork skin (2), a frame (3) carrying the formwork skin and a support (4) which is arranged inside the frame (3) and supports the formwork skin (2), characterized in that an even number of supports (4) are arranged inside the frame (3), wherein the two outer supports (4a, 4b) each have at least one penetration opening (5) for an anchor.

4. The formwork element (1) according to one of the preceding claims, comprising a formwork skin (2), a frame (3) carrying the formwork skin (2) and a support (4) arranged inside the frame (3) and supporting the formwork skin (2), characterized in that at least one support (4) has at least two insertion openings (5), wherein the shortest distance of a first insertion opening (6) of the at least two insertion openings (5) to the frame (3) is smaller than the shortest distance of a second insertion opening (7) of the at least two insertion openings (5) to the frame (3).

5. Formwork element (1) according to any one of the preceding claims, characterized in that inside the frame (3) there are provided two or four supports (4).

6. The formwork element (1) according to one of the preceding claims, characterized in that the supports (4), in particular two or four supports, are oriented parallel to one another and/or are spaced evenly apart from one another.

7. Formwork element (1) according to one of claims 4 to 6, characterized in that the second penetration opening (7) is spaced apart from two mutually adjacent frame edges (8, 9) of the frame (10) by an equal distance.

8. Formwork element (1) according to any one of the preceding claims, characterized in that said support (4) is made of a section steel with trapezoidal profile and/or has trapezoidal cross section.

9. The formwork element (1) according to any one of the preceding claims, characterized in that the frame (3) has a length to width ratio of 3 to 5.

10. Formwork element (1) according to one of the preceding claims, characterized in that the frame (3) is configured without projections on the inside.

11. The formwork element (1) according to one of the preceding claims, characterized in that the frame (3) has connection openings (18, 19), preferably punched connection openings, in particular at least two different types of connection openings (18, 19), in particular the clear widths of the different connection openings (18, 19) transversely to the formwork skin (2) are selected to be uniform, and/or wherein at least one connection opening (18) of a first type is configured as a long hole and/or a connection opening (19) of a second type is configured as a round hole.

12. The formwork element (1) according to any one of the preceding claims, characterized in that the supports (4) are configured identically to one another.

13. Formwork composite component, comprising at least two different types of formwork elements (1) according to one of the preceding claims, in particular two intersecting lines (23, 24) of insertion openings (5, 6, 7) of a first type of formwork element (1) matching in their position the lines (25) of insertion openings (5, 6, 7) of a second type of formwork element (1), and/or at least one type of formwork element (1) according to one of the preceding claims, having at least one connecting clip (20), in particular a retaining projection (22) on a clip arm (21) of the connecting clip (20) being configured to cooperate with a connecting opening (18, 19) in a frame (3) of the formwork element (1).

14. Use of a connection opening (18, 19) in a frame (3) of a formwork element (1), in particular according to any one of claims 1 to 12, and/or in a formwork combination member according to the preceding claim, for selectively fixing a connection clip (20) and a penetration peg (23) for connecting the formwork element (1) with another formwork element.

Technical Field

The invention relates to a formwork element having a formwork skin, a frame carrying the formwork skin and a support arranged inside the frame and supporting the formwork skin.

Furthermore, the invention relates to a formwork combination element comprising such formwork elements and which can be formed from different types of formwork.

Background

Such formwork elements are known in practice in various embodiments and are used, for example, in the construction of concrete formworks.

Because of the loads such formwork elements are subjected to, it is necessary to design the formwork elements to be robust. This is often accompanied by a relatively high weight of the formwork element, which may make the handling of such formwork elements difficult.

Disclosure of Invention

It is therefore an object of the present invention to provide a formwork element of the type mentioned at the outset, which improves the use properties compared to known formwork elements.

To solve this object, a formwork element having the features of independent claim 1 for such a formwork element is initially proposed.

In order to solve the above-mentioned problem, it is therefore proposed, in particular, in a formwork element of the type mentioned at the outset that the frame of the formwork element is made of flat steel without a profiled contour and the support of the formwork element is made of open-type steel sections. Such a section steel with an open cross section can be considered an open section steel, for example. The support made of the steel section has the advantage over the support made of the flat steel that the contact points of the support on the formwork skin are further away from one another. In this way, the supports can be arranged somewhat further away from one another than is possible in the case of the previously known formwork elements of the type mentioned at the outset, although a greater distance of the supports from one another can also achieve a similar or even higher load capacity and stability of the formwork element than in the case of the formwork elements known to date. Furthermore, by using a support part made of steel section, the overall weight of the formwork element can be reduced compared to previously known formwork elements of similar dimensions. Thus, a formwork element is provided overall which provides a good compromise between as high a load capacity as possible and a low dead weight. Furthermore, the support made of open-type steel sections can be coated relatively simply on all sides, for example with a corrosion protection layer. Thus, the corrosion resistance of the formwork element provided with these supports is improved at relatively low cost.

Flat steel without a profiled contour can, for example, be produced by means of a cylindrical roll.

In one embodiment of the formwork element, it can be provided that the support is arranged in such a way that the profile steel opens out toward the formwork skin. In this way, the top side and/or the head of the respective support can be used for fixing. Furthermore, it is possible for the profile steel to have a symmetrical profile, in particular a hat-shaped profile. The use of a profiled steel section with a symmetrical profile can facilitate an advantageous stress distribution on the support. If the profile of the profile steel of the support part is a hat profile, the support part provides a bearing surface on which the support part rests flat on the formwork skin and/or can be used for fastening, for example by riveting in pre-punched holes.

The profiled bar may have at least one longitudinal groove on its top side. The fixing element to be fixed on the support can engage behind the longitudinal groove and thus be fixed on the support in a rotationally fixed manner.

To solve this object, a formwork element of the type mentioned at the outset is also proposed, which has the features of the second independent claim for such a formwork element. In particular, in order to solve this problem, it is proposed in such a housing part to provide an even number of support sections within the frame, wherein each of the two outer support sections has at least one insertion opening for an anchoring element. These penetrating openings define so-called anchoring points for the formwork elements. In particular, if the supports are arranged uniformly distributed within the frame, the fitting can be mounted on any support. Furthermore, the formwork element can thus acquire a certain symmetry, which simplifies its handling and in particular its orientation in use. In particular, if four supporting parts are arranged uniformly distributed within the frame, the advantage is obtained that the anchoring points defined by the insertion openings of the at least two outer supporting parts are automatically arranged at 1/5 of the total length or total height of the formwork element. This distance from the edge of the formwork element and/or the frame defines a particularly advantageous position of the anchor on the formwork element with respect to the occurring loads and with respect to the desired stress distribution. A particularly advantageous or even optimized balance thus occurs between the load introduced at the short end relative to the anchor and the load of the formwork skin introduced onto the formwork skin at the long end or between two adjacent anchor points.

The insertion openings which define the anchoring points are here preferably arranged in the vicinity of the edges of the frame or formwork element. In such a support made of profiled steel, the provision of the insertion openings in the support has the advantage that the profiled steel at the same time also provides a support for the plates or spacers, with which the anchor sections hold the formwork skin and ultimately also the formwork elements. This is particularly important to prevent adjacent formwork elements (preferably of identical construction) from being pressed out of their position by the pressure of the concrete poured in the use position of the formwork elements (in which no anchor is used) and thereby deflecting the plates or spacers.

Finally, the object mentioned at the outset is also achieved by a formwork element of the type mentioned at the outset, which has the measures and features of the third independent claim for such a formwork element. In order to solve the above-mentioned object, it is therefore proposed, in particular, in a formwork element of the type mentioned at the outset that at least one support has at least two insertion openings, the shortest distance of a first of the at least two insertion openings to the frame being smaller than the shortest distance of a second of the at least two insertion openings to the frame. This enables the formwork element to be selectively used in a standing or lying position.

In this connection, it should be mentioned that it is particularly advantageous if the aforementioned formwork element and also the formwork elements claimed by the two first independent claims are rectangular. As already mentioned before, the insertion openings for the anchors define the anchoring points of the formwork element. The anchoring points arranged near the edges of the formwork element, i.e. arranged at a small distance from the frame of the formwork element, are generally not available for anchoring in the lying position of the preferably rectangular formwork element.

The insulation panels or insulation elements are usually injected into the foundations of the building structure, on which the other walls should be manufactured with the aid of formwork elements. These dividing walls or elements serve to close the seams or gaps between the wall to be newly cast on the foundation and the foundation. However, since the separating plates or separating elements are already introduced at the time of manufacture, they interfere in principle with the arrangement of the anchoring elements in the case of flat-lying formwork elements. However, with a second insertion opening at a greater distance from the frame than the first insertion opening, at least one insertion opening is available in the formwork element according to the invention and can still be reached with a reliable probability even when the formwork element is used or set flat for installing anchors or anchor rods. This is also the case if the insulation panels or elements are cast in the aforementioned manner in the foundations of the building structure to be manufactured.

It should be mentioned here that the features of the formwork element described above, in particular the features to which one or both of the independent claims 1 and 2 are directed, can be applied in a rational manner even in this embodiment of the formwork element. For example, it is particularly advantageous to provide the aforementioned insertion openings in a plurality of or all of the supporting sections. The plurality of insertion openings can be arranged at the same height in one direction and/or at the same distance from the frame in the different supports of one formwork element.

In particular in a corresponding arrangement of the second insertion openings, which can be located internally with respect to the frame, it can therefore be ensured that the anchoring points defined by the insertion openings continue to be located at the same height with a rotation of the formwork element by 90 °. This has an aesthetic advantage, since in the poured concrete the corresponding anchoring points visible on the finished component are aligned with each other.

In all the aforementioned formwork elements, a formwork skin with a thickness or dimension of 12mm can be used. In this case it should be mentioned that the formwork skin can be made of plywood or plywood, for example. The form skin for the form elements can be manufactured in a variety of thicknesses or dimensions. It is thus possible to provide a structural family of formwork elements of the type mentioned at the outset which are distinguished from one another by their formwork skins. In this case, for example, a formwork skin with a thickness or dimension of 12mm can be used in the formwork element of the structural series of formwork elements, while a further formwork element from the structural series of formwork elements can have a formwork skin with a thickness of, for example, 15 mm.

As already explained above, it may be advantageous to provide two or four supports inside the frame of the aforementioned formwork element. In particular, the use of four supports, which are preferably distributed uniformly within the frame, is particularly advantageous, since the supports are arranged such that the insertion openings provided in the two outer supports of the total of four supports here are arranged relative to at least one side of the frame and/or the formwork element at positions corresponding to 1/5 and/or 4/5 of the length of this side.

In one embodiment of the formwork element, it is provided that the supports, in particular two or four supports, are aligned parallel to one another and/or are spaced apart uniformly from one another. This provides a symmetrical construction of the formwork element constructed in this way, which in turn makes it possible to simplify the handling and orientation of the formwork element in practice.

The aforementioned support portion of the formwork element may be made of a section steel having a trapezoidal profile. Thus, the support portions may have a trapezoidal cross section.

It is particularly advantageous if the frame of the formwork element has a length to width ratio of 3 to 5(3zu 5). This is particularly advantageous, in particular in combination with the formwork element according to the third independent claim, because this automatically brings the insertion openings for the anchors for flat installation or flat use of the formwork element at 1/3 of the overall height of the formwork element and thus remains accessible for the anchors even in the case of pouring insulation slabs into the foundation. It is particularly advantageous if the formwork element with these dimensions has four evenly distributed supports and two insertion openings evenly distributed over one support, since a uniform arrangement of the anchor rods can thereby be achieved independently of the orientation of the formwork element.

All the aforementioned formwork elements are preferably designed as manually transportable formwork elements which can be carried by two persons. Thus, the self weight of the formwork element can be up to 50kg or less.

For this purpose, the formwork element preferably has a handle. In a particularly advantageous embodiment of the formwork element described above, it is provided that the formwork element has at least one additional support. The additional support may be arranged or oriented transversely or perpendicularly to the at least one support of the formwork element. It is furthermore possible for the formwork element to have at least one additional support, in particular such an additional support which is arranged transversely or perpendicularly to the at least one support of the formwork element, which additional support has at least one retaining handle and/or at least one retaining opening. It is of course also possible for the formwork element or at least one support of the aforementioned formwork element to have at least one armrest and/or at least one retaining opening.

The armrest and/or the holding opening are preferably formed on two sides lying opposite one another. Thus, carrying by two persons can be achieved, especially in the case of a self-weight of 50kg or less.

It should be noted here that all the aforementioned handrails and/or holding openings of the formwork elements can be configured for fixing the load receivers, which are suitable for crane transport of the formwork elements themselves. In one embodiment of the formwork element, the aforementioned at least one load receiver can be an integral part of the formwork element. In this way, additional elements and/or additional operating steps are avoided when using a formwork element configured in this way.

The frame of the aforementioned formwork element may for example have a height of 75mm or less. It should furthermore be noted that the internal structure of the frame, which is composed of the support part of the formwork member and the formwork skin, may overall have a height which is equal to the height of the frame or less than the height of the frame.

In particular, the formwork skin does not protrude beyond the frame when the height of the aforementioned internal structure is the same as the height of the frame. Thus, a flush arrangement of the formwork skin on the frame of the formwork elements can be achieved, which prevents formwork elements constructed in this way from getting stuck when they are stacked for transport or storage. Thus, damage to the stacked formwork elements can be avoided. It can also be expedient to avoid the formwork skin projecting beyond the frame, since, when a plurality of formwork elements are used one above the other, a reinforcement in the form of a web is placed from the outside, which reinforcement is intended to be placed both on the support of the respective formwork element and on the frame of the formwork element.

In another embodiment, the formwork element can have a frame with a square basic shape. In another embodiment, the formwork element can have a frame with a non-square and/or rectangular basic shape. Rectangular form elements can thus be obtained. In particular in the case of a rectangular formwork element, the support can be oriented along a short side of the rectangular basic shape of the frame of the formwork element.

In an advantageous embodiment, it can be provided that the frame is formed without projections on the inside.

The advantage here is that the flat steel does not have to be provided with additional structures. This may save costs in manufacturing.

In an advantageous embodiment, it can be provided that the frame preferably has stamped connection openings. The design of the stamped connecting opening is advantageous in particular in the case of small numbers of pieces in relation to the use of the steel section, since no rolling tools have to be purchased.

It is particularly advantageous to form at least two different types of connection openings. Different types of fixed possibilities can thus be constructed.

It can be provided here that the clear width of the different connection openings transversely to the formwork skin is selected to be uniform. The orientation of the formwork skins transverse to their direction of extension relative to one another can thus be defined independently of which connection opening is selected.

In this case, it can alternatively or additionally be provided that the at least one first type of connection opening is configured as an elongated hole. A fixed or defined orientation of the connected formwork elements in one direction and tolerances in a second direction can thus be achieved in a simple manner.

Alternatively or additionally, it can be provided that the second type of connection opening is configured as a round hole. Thus, a fixed or defined orientation of the connected formwork elements in both directions can be achieved in a simple manner.

The elongated hole can be characterized in that a connecting means, for example an insertion pin, which can be placed in the elongated hole in the transverse or narrow direction without play, has a play in the longitudinal direction. The circular hole is characterized in that, for example, the connecting means, for example the insertion pin, which can be placed in the elongated hole without play in the transverse direction, likewise has no play in the longitudinal direction.

In an advantageous embodiment, it can be provided that the support parts are of identical design to one another. Thus, the number of parts used to manufacture the formwork element can be reduced and the tooling costs can be reduced. The design of the additional insertion openings for the anchor rods is also simplified, since no further treatment of the support is necessary.

The invention achieves the object of providing a formwork combination element according to the independent claims directed to a formwork combination element, which comprises at least two types of different formwork elements of the aforementioned form. The formwork combination member can facilitate the manufacture of so-called lightweight formworks, especially when the self-weight of the formwork element is correspondingly 50kg or less. An advantage of using such a formwork assembly member is that a crane is not necessary to construct and/or disassemble the formwork formed by the formwork assembly member. This may save time and cost.

In this case, the two intersecting lines of the insertion openings of the first type of template elements can be matched to the lines of the insertion openings of the second type of template elements in their position, i.e., for example, in terms of height relative to the support surface in the respective use position. It is advantageous here that the anchor rods can be placed at a uniform height, in particular in the case of two different orientations of the formwork elements of the first type. This is particularly advantageous when processing fair-faced concrete, since then a uniform image of the (closed) hole relative to the anchor rod is obtained.

It can also be provided that at least one type of formwork element is constructed according to the invention, in particular as described above and/or according to any of the claims for the formwork element, and that at least one connecting clip is present in the formwork assembly component. The formwork elements can thus be simply connected to one another on a frame which does not have a profiled contour. In this case, it can be provided that the holding projections on the clip arms of the connecting clip are configured to cooperate with connecting openings in the frame of the formwork element. Thus, the clip can be prevented from slipping off.

The invention also enables the use of connection openings in the frame of a formwork element, in particular as described above and/or according to any of the claims directed to the formwork element, for selectively fixing connection clips and through-bolts for connecting the formwork element with another formwork element. Thus, more cost-effective insertion pins or simply operable connection clips can be used alternatively. The template elements may be, for example, from the template assembly members described previously.

Drawings

The invention will now be described in detail by means of two examples, without the invention being restricted to these examples. Further embodiments are derived from combinations of features of single or multiple claims with each other and/or with single or multiple features of an embodiment. In a partly highly schematic illustration:

fig. 1 shows an isometric rear view of a formwork element, in the frame of which four supports are arranged evenly distributed,

figure 2 shows an isometric front view of the formwork skin of the formwork element shown in figure 1,

fig. 3 shows an isometric rear view of another formwork element, in whose frame two supports are arranged evenly distributed,

figure 4 shows an isometric front view of the formwork skin of the formwork element shown in figure 3,

fig. 5 shows an isometric rear view of a formwork assembly consisting of two formwork elements as shown in fig. 1 to 4, wherein the formwork element with four supports inside its frame is arranged in a standing position,

fig. 6 shows a rear isometric view of another formwork element consisting of two formwork elements shown in fig. 1 to 4, wherein the formwork element with four supports inside its frame is arranged in a lying position,

figure 7 shows a partially sectioned isometric rear view of one of the formwork elements shown in the previous figures,

FIG. 8 shows a detail view in cross-section of two formwork elements held together by a connecting clip, an

Fig. 9 shows a schematic view similar to fig. 8, wherein the formwork elements are held together by means of insertion bolts.

Detailed Description

In the following description of the different embodiments of the invention, elements that are identical in terms of their function are provided with identical reference numerals, even in the case of configurations or shapes that may differ from one another.

All the figures show a formwork element, designated as a whole by 1, respectively. Each of the formwork elements 1 has a formwork skin 2, a frame 3 carrying the formwork skin and a support 4 or strut arranged inside the frame 3 and supporting the formwork skin 2.

In all the embodiments of the formwork element 1 shown in the figures, the frame 3 is accordingly made of flat steel. The support part 4 of the formwork element 1 shown is itself made of open, symmetrical steel profiles. The support 4 of the formwork element 1 therefore, on account of its cross-section with the profile, achieves a higher rigidity than the material used for the production of the support 4, compared to the supports used in previous formwork elements and made of flat steel without the profile. Such a high rigidity of the support 4 contributes on the one hand to a high overall rigidity of the respective formwork element 1 and thus also to its high load capacity. On the other hand, by using a support 4 made of steel profile, the formwork element 1 has a particularly small overall weight compared to its load capacity and stability. This is advantageous in order to simplify the handling of the formwork element 1.

The profile steel of the support 4 is open towards the formwork skin 2 of the respective formwork element 1. The sectional view according to fig. 7 furthermore shows, in particular, that the profile steel for the support 4 is a hat profile or has a hat profile. The support 4 therefore has a bearing surface 16, by means of which it rests in a planar manner on the formwork skin 2. The formwork skin 2 is fixed to the support 4 by means of rivets 15. Furthermore, the profile steel of the support 4 has two longitudinal grooves or corrugations 14 (tucke) on its top side 13, which are oriented parallel to one another. A fixing element, not shown in the figures, for example an anchor, can engage behind the longitudinal groove 14 and in this way be fixed non-rotatably on the support 4.

Each illustrated formwork element 1 has an even number of supports 4 inside its frame 3. At least two outer supports 4a and 4b of these supports 4 are respectively equipped with a plurality of insertion openings 5, 6 and 7 for anchors not shown in the figures.

In the formwork element 1 shown in the figures, it is even provided that all the supports 4 each have at least two insertion openings 5, 6 and/or 7. In this case, the shortest distance of a first insertion opening 6 of the at least two insertion openings 5 to the frame 3 of the respective formwork element 1 is shorter than the shortest distance of a second insertion opening 7 of the at least two insertion openings to the frame 3.

In the embodiment of the formwork element 1 shown in fig. 1 and 2, a total of four supports 4 are provided inside the frame 3. In the embodiment of the formwork element 1 shown in fig. 3 and 4, a total of two supports 4 are provided inside the frame 3.

All the supports 4 are oriented parallel to one another and are furthermore arranged inside the respective frame 3 at a uniform spacing from one another. The respective second insertion opening 7 is spaced at equal distances from two adjacent frame edges 8 and 9 of the frame 3.

In particular, the sectional view of the formwork element 1 according to fig. 7 shows that the support 4 is formed by a trapezoidal profile. At least the formwork element 1 shown in fig. 1 and 2 has a frame 3 with an aspect ratio of 3 to 5.

Each formwork element 1 also has an additional support 10. These additional supports are arranged transversely, more precisely perpendicularly, to the support 4 of the respective formwork element 1. In addition, retaining openings 11 are formed in each case in the additional support 10. The retaining opening 11 provided in each formwork element 1 simplifies the handling of the formwork elements 1. The holding opening 11 allows manual transport of the formwork element 1 by two persons.

Furthermore, a reinforcing element 12 is provided between adjacent frame edges 8 and 9 of the frame 3 of the respective formwork element 1.

In particular, the inner insertion openings 5, 6, 7 are configured as elongated holes, which makes it easier to introduce anchor rods or concrete anchors.

Fig. 6 shows that the support 4 of the square or square formwork element 1 arranged on the left is arranged such that the insertion openings 5, 6 formed therein are aligned with the second insertion openings 7 in the support 4 of the second rectangular formwork element 1.

All the figures with rectangular formwork elements 1 as subject show that the support 4 of said rectangular formwork elements 1 is oriented along the short side of the rectangular basic shape of the frame 3 of the respective formwork element 1.

Fig. 5 and 6 also serve to illustrate a formwork assembly member comprising at least two types of different formwork elements 1 of the aforementioned form. As shown in fig. 5 and 6, the formwork combination member allows for variable construction of the formwork formed by the formwork element 1.

Fig. 8 shows the connection of two formwork elements 1 by means of a connecting clip 20. For this purpose, connection openings 18, 19 are punched into the frame, into which the holding projections 22 of the connection clips 20 and the clip arms 21 engage. The holding projections 22 are dimensioned and arranged on the clamping arms 21 in such a way that they engage into the connecting openings 18, 19, at least along the clamping arms 21, practically without play, in order to orient the formwork elements 1 relative to one another.

Here, two types of connection openings 18, 19 are formed.

The first type of connection openings 18 (see fig. 7) are designed as oblong holes, so that a fastening without play is only effected transversely to the formwork skin 2, i.e. in the transverse or narrow direction of the oblong holes. In contrast, the second type of connection opening 19 (see fig. 7) is designed as a round hole (with clearance for the passage of a wing 24 of the plug 23, as will also be explained in more detail below). The circular hole causes the formwork element 1 to also be oriented along the frame 3 adjacent to the connecting opening 19, since the through-bolt 23 or the retaining projection 22 is completely fixed.

Overall, it can be seen that the frame 3 is formed without projections on its inner side 17 and from flat steel without a profiled contour.

The punched connection openings 18, 19 form lateral recesses, on which the connection clips 20 can act so as not to slip off.

Fig. 9 shows an alternative form of connection of two formwork elements 1. In this case, a through-bolt 23, which may have a diameter equal to that of the holding projection 22, is inserted through one of the two connection openings 18, 19. The wings 24 are dimensioned such that they fit through both the recesses 25 of the circular hole and the elongated hole. After a rotation of 90 °, the insertion bolt 23 is then fixed.

In order to ensure a gap-free property transversely to the formwork skin 2, the different connection openings 18, 19 are identical transversely to the clear width of the formwork skin 2.

In contrast, the space in the elongated hole, i.e. in the connecting opening 18, for placing the retaining projection 22 in the connecting opening 18, 19 is larger along the formwork skin 2 than in the circular hole of the connecting opening 19. As can also be seen from the figures, the support parts 4 are formed identically to one another within one formwork element 1.

As can be seen by comparing fig. 1 to 6, two intersecting lines of penetration openings 5, 6, 7 are formed in the formwork element 1 of fig. 2. That is, the penetration openings 7 form one vertical line, and the penetration openings 6 form two horizontal lines (with further penetration openings) which intersect or intersect the vertical line.

The height of the lines at the edge with which the formwork element 1 is arranged on the base or the support surface is consistently selected to be of the same size and to correspond to the height of the corresponding lines on the formwork element 1 according to fig. 4. In the case of two formwork elements arranged next to one another, a horizontal line is thus obtained, independently of their spatial orientation, on which the anchor rods lie.

The present invention relates to improvements in the technical field of concrete formwork construction. In addition, a formwork element 1 is proposed as a refinement, the frame 3 of which is made of flat steel, while the support 4 of the formwork element 1 is made of profiled steel.

List of reference numerals:

1. formwork element

2. Form panel crust

3. Frame structure

4. Supporting part

External support part

External support part

5. Inserting opening

6. First penetrating opening

7. Second penetrating opening

8. Frame wall

9. Frame wall

10. Additional support part

11. Holding opening

12. Reinforcing element

13. Top side

14. Longitudinal grooves

15. Rivet

16. Bearing surface

17. Inner side

18. Connection opening (first type)

19. Connection opening (second type)

20. Connecting clamp

21. Clamping arm

22. Retaining projection

23. Plug-in bolt

24. Wing part