CN111719855A

CN111719855A - Connecting strip for floor slab formwork

Info

Publication number: CN111719855A
Application number: CN202010208119.3A
Authority: CN
Inventors: 威尔弗里德·海伯利; 贝恩德·伦茨; 吉斯伯特·埃佩尔特
Original assignee: Peri GmbH
Current assignee: Peri GmbH
Priority date: 2019-03-22
Filing date: 2020-03-23
Publication date: 2020-09-29
Also published as: PL3712352T3; HRP20221340T1; DK3712352T3; US20240247505A1; DE102019107430A1; RS63765B1; ES2930427T3; EP3712352A1; EP3712352B1; US20200332541A1; CA3076326A1; CA3076326C

Abstract

Connecting strip for floor formworks, characterized in that it has, over its length, a plurality of coupling areas at a distance from each other for engagement with the support heads of the formwork supports. An assembly of a plurality of formwork supports against which the connecting strip bears in a coupling manner. A method of creating and removing at least one section of a floor form.

Description

Connecting strip for floor slab formwork

Technical Field

The invention relates to a connecting strip for floor formworks, which has a plurality of coupling areas at a distance from each other for engaging with a support head of a formwork support over the length thereof.

The connecting strip of the present invention may be used for concrete cast floor forms. The connector strip may also be used with other floor forms, for example, floor forms used to temporarily support a floor structure during maintenance operations. The connector strip of the present invention may be used to effect the connection of a first construct to a second construct in a construction operation. The first construction body may for example be an assembly of elements of a floor formwork, and the second construction body may for example be a building wall. The connecting strip may also be used in other connection situations, for example to connect floor forms to adjacent horizontal steel beams.

Background

The aim of such linking is currently usually achieved in a case-by-case solution, or by closing the transition region between the first and second constructs in a way that is more biased towards manual operation.

Disclosure of Invention

In the case of the connecting strip of the invention, the function of establishing the connection is associated in a novel manner with a solution taking into account the formwork support of the corresponding connecting strip.

The connecting strip according to the invention can have a plurality of coupling regions at a distance from one another over its length for positive engagement with the support head (formschlussig) of the formwork support. The positive-fit engagement can be effected with regard to forces substantially in the longitudinal direction of the connecting strip. It is also possible, but not necessary, to provide positive-fit properties that act in respect of forces in other directions.

In one embodiment of the invention, the coupling regions at a distance from one another comprise an end coupling region in each case located in the two longitudinal end regions of the connecting strip. The two end coupling regions may be the only coupling regions of the connecting strip, but this is not essential. The connecting strip thus spans the distance between the first formwork support and the second formwork support in the installed state.

Each end coupling region may be configured such that the connecting strip, in the coupled state with the associated support head, selectively either covers substantially only half the width (measured in the longitudinal direction of the connecting strip) of the support head or covers this width of the support head entirely. The half-covering provides an easy to implement solution for continuing the arrangement of the further connecting strip in the longitudinal direction of the connecting strip. The full coverage is particularly advantageous in the following situations: the further connecting strip is not provided further, for example because the end face of the connecting strip bears against the building wall there.

In one embodiment of the invention, the connecting strip has at least one intermediate coupling region between the two end coupling regions for engagement with a support head of a formwork support. The construction of the intermediate coupling region can differ from that of the end coupling regions, but this is not essential. In this embodiment, the tie bars work in conjunction with three or more formwork supports. The advantages of this embodiment will be described in more detail below with reference to several examples.

As disclosed in the preceding part of the description, the connecting strip of the invention may also be characterized in that at least one of the coupling regions has a feed-in region for engaging with the receiving region on the support head, or that all coupling regions each have a feed-in region for engaging with the receiving region on the support head. The "opposite configuration" may also be used, i.e. at least one of the coupling regions has a receiving region for engaging with the feed-in region on the support head, or all coupling regions each have a receiving region for engaging with the feed-in region on the support head. The feed-in region-receiving region connection can be designed as a positive-locking connection, but this design is not necessarily the case. This feed-in area-receiving area engagement can be achieved simply during the mounting of the connecting strip on the support head of the formwork support. The feed-in area-receiving area joint is very strong. The connecting strips and the supporting heads are also relatively difficult to manufacture.

As disclosed in the previous part of the description, the connecting strip of the invention may also be characterized in that it has, in cross section, a base edge which is horizontal during use (schenkel) and a base edge which is vertical during use, and in that at least a part of the coupling region is positioned laterally on the base edge which is vertical during use. This basic shape of the connecting strip is a good prerequisite for a reliable positioning of the connecting strip on the formwork securing device.

The tie-bar of the invention may have a body composed of metal, in particular of aluminium, including aluminium alloys. The body may be an extrusion of metal to which other components are secured.

The connecting strip of the invention may be constructed such that its top side is provided as part of the profiled surface of the floor slab form. In this case, the connecting strip is a functional component of the formwork of the floor formwork during use. Wherein the top side of the connecting strip can be provided with a formwork. This can be achieved by placing a formwork strip on top.

The connecting strip according to the invention can have at least one abutment region which is provided for abutment against a wall, in particular a building wall. Owing to this feature, the connecting function of the connecting strip on the wall portion can be achieved very well, and a particularly reliable positioning of the connecting strip relative to the wall portion can be achieved.

As disclosed in the previous section of the specification, the connecting strip of the invention may also be characterised in that the distance between the coupling areas is arranged to enable the coupling areas to engage with a support head of the formwork support at a centre distance adapted to the width of the floor formwork panel. The tie-bars thus configured, when mounted to the support heads of the associated formwork supports, force the formwork supports to be spaced from each other by a defined centre distance corresponding to the width of the floor formwork panels. This allows floor formwork panels connected to the connecting strips to be placed in a particularly simple manner.

As disclosed in the preceding part of the description, the connecting strip of the invention may also be characterized in that it covers only substantially half the width (measured transversely to the longitudinal direction of the connecting strip) of the support head in the coupled state with the associated support head. This does not exclude the case that the width, measured transversely to its longitudinal extension, is greater than half the width of the support head, wherein in this case a portion of the width of the connecting strip protrudes beyond the support head. By means of said "half-covering", the other half of the width of the support head can be covered by the edge region of a formwork panel, or by the corner regions of two formwork panels side by side.

Another subject of the invention is an assembly, as disclosed in the previous section of the description, with at least one formwork support for a floor formwork and a connecting strip according to the invention coupled with a support head of the at least one formwork support, wherein the connecting strip rests with its underside on the support head and one of the terminal coupling areas of the connecting strip engages with a counter-coupling area of the support head. This assembly can be implemented as follows: two formwork supports for the floor formwork are provided, and the connecting strip is connected to the two formwork supports in the manner described by means of one of its two end connecting regions.

In a further embodiment, at least one additional formwork support can be provided between the two formwork supports, wherein the connecting strip rests with its underside on the support heads of the additional formwork support, and an intermediate coupling region of the connecting strip engages with a mating coupling region of the support heads of the additional formwork support.

As far as the formwork support-tie bar assembly(s) is concerned, as disclosed in the previous part of the description, the following embodiments can be adopted: the two formwork supports corresponding to the two end coupling regions of the connecting strip are provided with a stabilizing device, such as a tripod, while the additional formwork support(s) corresponding to the intermediate coupling region(s) of the connecting strip are not provided with a stabilizing device, but may also be provided with a stabilizing device. The assembly of the invention can be implemented as follows: the connecting strips define the mutual distance of the formwork supports due to their positioning on the formwork supports, for example the distance(s) matching the width of the floor formwork panel(s).

As disclosed in the preceding part of the description, the assembly may also have at least one floor formwork panel which, at each of its two corner regions adjacent to the connecting strip, bears against and engages with the support head of the associated formwork support corresponding to the connecting strip. The connecting bar is thus the starting element (Anfangsglied) of the floor formwork. The connecting strip enables a floor formwork, for example, to be connected to a wall, enabling, for example, a transition between a wall and a floor formwork panel. The connecting strip may have a height such that its top side lies substantially in a plane with the top side of the at least one floor form panel.

As far as the formwork support-tie bar assembly(s) is concerned, as disclosed in the previous part of the description, the following embodiments can be adopted: the connecting strip covers only substantially half of the width (measured transversely to the longitudinal direction of the connecting strip) of the support head of the at least one formwork support. This does not exclude the case where the width of the connecting strip, measured transversely to its longitudinal extension, is greater than half the width of the support head, wherein in this case a portion of the width of the connecting strip protrudes beyond the support head. The remaining width of the support head may be used for the edge region of a floor form panel, or for the corner region of two adjacent floor form panels. The top side of the connecting strip and the top side of one or more floor form panels are connected to each other to form a section of the forming surface of the concrete.

The formwork support members used in the assembly of the invention in correspondence with the tie bars may have support heads each having a lowered region on the side facing at least one adjacent formwork panel, the lowered regions being lowerable relative to the remaining support heads for effecting lowering of the two corner regions of the at least one floor formwork panel adjacent to the tie bars.

With regard to the assembly of the invention, the "engaging" feature may be configured as a "positive fit engagement" as disclosed in the preceding sections of the specification.

Another subject of the invention is a method for establishing at least one subdivision of a floor slab formwork, having connecting strips as disclosed in the previous section of the description, characterized by the following steps:

(a) arranging a first formwork support member beside the wall portion;

(b) -arranging a second formwork support alongside the wall portion and substantially taking the centre distance given by the two end joining regions of the connecting strip; and

(c) placing the connecting strip on the first and second formwork supports, wherein each end coupling region of the connecting strip engages with a corresponding coupling region of the support head of the associated formwork support, respectively, wherein said engagement defines a centre distance between the first and second formwork supports in a section of the floor formwork.

As already mentioned, it is also possible here to erect a first and a second formwork support, each provided with a stabilizing device.

This method may add the following additional steps:

(d) at least one additional formwork support is provided alongside the wall between the first and second formwork supports, wherein an intermediate coupling region of the connecting strip is brought into engagement with a counterpart coupling region of the support head of the at least one additional formwork support, wherein said engagement defines the positioning of the at least one additional formwork support in the section of the floor formwork.

In this way, the engagement defines the center distance of the formwork supports corresponding to the tie bars from each other. These center distances may match the width of the floor form panels (which may also be different from each other).

The process of the invention may have the following additional steps:

(e) a holding element is provided, which acts between the wall and the connecting strip and holds the connecting strip against the wall.

The holding element can be configured such that it not only prevents the connecting strip from leaving the wall, but also maintains the spatial position of the connecting strip, in particular ensures the alignment of the top side of the connecting strip which is part of the (usually horizontal) profiled surface of the floor formwork.

As disclosed in the previous sections of the description, the method of the invention may add the following additional steps:

(f) one or more floor formwork panels in the row of floor formwork panels are respectively hung on the supporting heads of two adjacent formwork supporting pieces corresponding to the connecting strips through two corner areas, and then are deflected upwards through the other two corner areas which are not hung, and the floor formwork panels are supported by means of the formwork supporting pieces at least one of the other two corner areas.

The "supporting of the relevant floor formwork panels at the other two corner regions by means of a respective formwork support" can also be carried out in two steps, i.e. first at one of the other two corner regions by means of a formwork support, subsequently the adjacent floor formwork panels of the same row are hung in and deflected upwards, and subsequently an additional formwork support is provided which supports the second of the other two corner regions and the first of the other two corner regions of the adjacent floor formwork panels. This method version will be described in more detail below in connection with several embodiments.

Another subject of the invention is a method of removing at least one sector of a floor slab formwork, which sector has a connecting strip of the invention as disclosed in the previous part of the description, and optionally one or more floor slab formwork panels adjacent to the connecting strip in a row of floor slab formwork panels,

the method is characterized by comprising the following steps:

(g) optionally removing one or more floor formwork panels adjacent the tie bars;

(h) optionally removing the at least one other formwork support corresponding to the connecting strip; and

(i) removing the connecting bar from the support heads of the first and second template supports and removing the first and second template supports.

In the latter method, the following advantageous effects are achieved: at the end of the removal or form removal of the floor slab, the assembly of tie bars and a row of formwork supports corresponding to the tie bars is still nearly maintained. This assembly is securely erected by the stabilizing means of at least a portion of the formwork support without any manual form of holding. In this case, even if only one person works, the detachment can be smoothly completed. There are two schemes for step (i). The connecting bar is first removed from the support heads of the first and second template supports and the first and second template supports are subsequently removed. Alternatively, the first or second template supports are first removed, the connecting strip is then removed from the support head of the other of the two template supports, and finally the other of the two template supports is removed.

It is emphasized here that the process steps (a) to (f) and (g) to (i) are not intended to define the necessary sequence of these steps, but in some cases (depending on the technical rationality) it may be expedient to employ a sequence of steps according to steps (a) to (f) or (g) to (i).

Thus, for example, the connecting strip can be placed onto the first and second formwork support at approximately the same time, or alternatively the connecting strip can be placed onto the first formwork support first, then the connecting strip is deflected further upwards and then supported by the second formwork support. The retaining element may be installed before step (d) or after this step. Step (i) may be carried out before or after step (h).

After constructing a row of floor formwork panels according to step (f), another row of floor formwork panels may be constructed in a corresponding manner, or several rows of floor formwork panels may be constructed in succession. This also applies to the removal of at least one section of the floor form in the reverse order.

In many cases, this erecting of the formwork support involves bringing the support head to the desired or required height. In the case of formwork supports which are customary in formwork construction, this is often achieved by "setting up", i.e. height adjustment of a part of the formwork support by means of a nut-and-thread screw drive. Accordingly, during disassembly or removal of the formwork support, it is necessary, at least in some instances, to lower at least the portion of the support head against which one or more floor formwork panels or tie bars abut. This can be achieved at least in some cases, for example, by lowering one support section by means of a nut-and-thread screw drive. The upward movement referred to in this section of the specification, and the downward movement of a portion of the formwork support referred to in this section, will be described more intuitively in connection with the embodiments below.

It is emphasized that in the present invention, it is alternatively possible to first fix the connecting strips to the wall sections and then to connect the formwork support elements associated with the connecting strips to the connecting strips at the locations given by the connecting strips. According to another alternative of the invention, the connecting strip is first coupled with the two end formwork supports in the assembled condition, which is different from the above-described condition involving formwork supports standing beside the wall. For example, the following situations may be possible: two formwork supports are laid on the ground, and connecting strips are connected with the formwork supports. The coupled assembly is then brought into a position of use beside the wall, for example by changing from lying to standing upright.

Drawings

The invention and its more specific embodiments are explained in more detail below with reference to the examples shown in the drawings. Wherein:

fig. 1 is a perspective view of a tie bar, viewed from obliquely above towards the top of the tie bar;

FIG. 2 is a perspective view of the connector shown in FIG. 1, viewed from obliquely below towards the connector;

FIG. 3 is a first side view of the connector strip of FIGS. 1 and 2, as viewed in the direction of arrow II in FIG. 1;

fig. 4 is a second side view of the connecting strip shown in fig. 1, 2, seen in the direction of the arrow IV in fig. 1;

fig. 5 is a bottom view of the connecting strip shown in fig. 1 and 2, according to arrow V in fig. 1;

fig. 6 is a schematic view of the connecting strip of fig. 1 and 2, viewed from the end according to arrow VI in fig. 2;

figures 7 to 12 are respective perspective views of temporally successive stages of a sectional set-up operation of a floor formwork;

FIG. 13 is an end view of the tie bar-template support assembly shown in FIG. 8, taken in the direction of arrow XI I in FIG. 8 and on a larger scale;

FIG. 14 is a section of FIG. 13 according to circle A and on a larger scale;

FIG. 15 is a perspective view of the connector bar-template support assembly shown in FIG. 9, viewed in the direction of arrow XV in FIG. 13 and on a larger scale;

FIG. 16 is a perspective view of the tie bar-template support assembly shown in FIG. 9, viewed in the direction of arrow XVI in FIG. 13 and on a larger scale;

fig. 17 is a section of fig. 16 according to circle B and on a larger scale.

Detailed Description

The connecting strip 2 shown in fig. 1 to 6 is made substantially of aluminum or an aluminum alloy. In this embodiment, the length of the connecting strip is 300 cm. A connecting strip 2 having a longer length or a smaller length may be employed; typically, the manufacturer provides a variety of connector strips 2 that are graded in length.

Roughly speaking, the connecting webs 2 have a T-shaped cross section, which can be seen most clearly on the end side in fig. 1 and 2 and in fig. 6. The "T" shape has a base edge 4 which is horizontal during use of the connecting strip 2 and a base edge 6 which is vertical during use of the connecting strip 2. At the intersection with the horizontal base edge 4, the vertical base edge 6 has a wider region 8 over approximately 1/3 of its height, which has a greater width (measured transversely to the longitudinal extension of the horizontal base edge 4 and to the longitudinal extension of the vertical base edge 6) than the width of the lower part of the vertical base edge 6. The wider region 8 has a substantially square hollow profile design in cross section, which has a longitudinally extending central slot on its top side, which occupies a large part of the width of the larger region 8. A strip 10 made of wood or plastic is inserted in the longitudinal direction in the hollow space of the hollow profile. In the strip 10, screws 12 are screwed from above through the horizontal base edge 4 and through the slot, so that the horizontal base edge 4 is fixed to the vertical base edge 6. Irrespective of the strip 10, the vertical base edge 6 is an extruded piece made of aluminum or an aluminum alloy.

A further strip 14 made of wood or plastic is fixed in the corner space between the longitudinal side of the wider region 8 and the bottom side of the horizontal base edge 4 by means of horizontal screws 16 which pass through the hollow profile into the strip 10. As shown in fig. 4, the further strip 14 is formed from a plurality of sections. The further slat 14 has a substantially square cross-section. The side of the further slat 14 facing away from the wider region 8 is vertically aligned with the immediately adjacent longitudinal side of the horizontal base edge 4.

The connecting strip 2 has a total of four

coupling regions

20, 22 for positive engagement with in each case one further coupling region to be described below on the support head of the formwork support. Two of these coupling regions are end coupling regions 20, which are each arranged in one longitudinal end region of the connecting strip 2. The other two coupling areas are intermediate coupling areas 22, which are provided on the connecting strip 2 between the two end coupling areas 20. These four

coupling regions

20, 22 can be seen in particular from the bottom view of the connecting strip 2 in fig. 5. The intermediate connection region 22 can be seen more clearly in fig. 1 and 2. In fig. 2, the lower end region 24 of the end coupling region 20 is shown, which lower end region 24 projects downwards beyond the lower end of the vertical base edge 6, with both sides being slightly inclined. The two end coupling regions 20 and their downwardly projecting end regions 24 can be seen more clearly in fig. 4 and 6. The two intermediate connection regions 22 can be clearly seen in fig. 1, 2, 3 and 6.

Each of the

coupling areas

20 and 22 shows a feed-in area which is respectively accommodated in one of the accommodation areas of the relevant support head during the assembly of the connecting strip 2 with the support head of the formwork support to be described below.

In the embodiment shown, each of the

coupling areas

20 and 22 is divided into two

pegs

21 or 23 which, in use, are vertical and spaced apart from each other in the longitudinal direction of the connecting strip 2. In the embodiment shown, the two pegs 21 of the relevant end coupling region 20 are common components made of metal, which are laterally fixed to the vertical base edge 6 of the connecting strip 2, for example by means of screws. In the exemplary embodiment shown, the two pegs 23 of the intermediate connecting region 22 are each a separate component made of metal, which is fastened laterally to the vertical base edge 6 of the connecting strip 2, for example by means of screws. The pegs 21 and 23 (in horizontal cross section) each have a substantially hollow-square design, with an attached fastening region for fastening to the connecting strip 2. The peg member may be made of a bent sheet, in particular a steel sheet.

The peg 21 of the terminal coupling region 20 is located on one of the two longitudinal sides of the vertical base edge 6, while the intermediate coupling region 22 is located on the opposite side of the vertical base edge 6.

Furthermore, in the embodiment shown, there are three positioning areas 26 over the length of the connecting strip 2. Each of the positioning areas 26 is divided into two pegs 27, which are spaced apart from each other in the longitudinal direction of the connecting strip 2 and which are vertical during use of the connecting strip 2. The two pegs 27 of each positioning region are integrated into a common component, which in the exemplary embodiment shown is made of a bent plate (in particular a steel plate) and is fastened laterally on the same side as the end connecting region, for example by means of screws, to the vertical base edge 6 of the connecting strip 2. The pegs 27 each have a substantially hollow trapezoidal design in horizontal cross section.

The

pegs

23 and 27 do not project downwards beyond the lower end of the vertical base edge 6. The

pegs

21, 23, 27 are not hollow on all sides, but are each positioned on one side on the vertical base edge 6, as can be seen clearly in the figures.

The distance between the left end of the connecting strip 2 in fig. 5 and the centre 30 of the immediate intermediate coupling zone 22 is 1 m. This distance is also between the centres 30 of the two intermediate coupling areas. This distance is also the distance between the center of the right-hand intermediate coupling area 22 in fig. 5 and the right end of the connecting strip 2 in fig. 5. The distance between the centre 28 of the end coupling region 20 and the centre 30 of the adjacent intermediate coupling region is slightly shorter than 1 m. The positioning region 26 is located approximately centrally between two

adjacent coupling regions

20 or 22, respectively.

Figures 7 to 12 (by way of illustration of successive construction stages in time) show how the connector strip 2 is constructed and then a row of floor formwork panels 40 is constructed.

It is noted that several details of the connector strip 2 shown in fig. 7 to 17 employ embodiments of the connector strip 2 different from those shown in fig. 1 to 6. Wherein, particularly in the case of the connecting strip 2 shown in fig. 7 to 17, the vertical base edge 6 of the connecting strip 2 is made of wood instead of metal and is provided with a wooden piece 32 or a plastic piece 32 instead of the positioning region 26 (see fig. 15). Nevertheless, fig. 7 to 17 clearly show how the connecting strip 2 shown in fig. 1 to 6 is used.

Fig. 7 to 12 each schematically show a corner of a room, wherein a floor 50 (for example, a floor located below the room), a first wall 52 and a second wall 54 perpendicular to the first wall can be seen. The two wall parts 52 and 54 mutually constitute the room corner.

In a first stage as shown in fig. 7, the first formwork support 60 has been erected in advance adjacent the second wall portion 54, and the second formwork support 62 has been erected adjacent the second wall portion 54. The first formwork support 60 is also located immediately adjacent the first wall portion 52 and so can be said to be located snugly in the room corner. Each of the two formwork supports 60 and 62 is provided with a stand-off device 64 in the form of an adjustable tripod so that the formwork supports 60 and 62 can be erected without being held. In the illustrated embodiment, the center distance of the template supports 60 and 62 (i.e., the horizontal distance between the vertical center axes of the template supports 60 and 62) is slightly less than 3 m. It will be appreciated that where other lengths of tie bars 2 are employed, the formwork supports 60 and 62 will need to be erected at correspondingly greater or lesser distances. In order to erect the formwork supports 60 and 62 at the correct distance, the connecting strip 2 can be placed as a scale on the ground, but other solutions are also possible.

For the sake of simplicity, the expression "formwork support" is replaced by "support" in the following.

Fig. 7 also illustrates how the connecting strip 2 can be placed by only one person onto the pre-arranged supports 60 and 62 (wherein other placements of the connecting strip 2 may be used). The connecting bar 2 is first placed from above slightly obliquely onto the support head 61 of the first support 60. Subsequently, the formwork aid 66 (i.e. a rod with a length slightly less than the height of the room) is supported below the connecting strip 2 and is expediently supported at a short distance from the right end of the connecting strip 2 in fig. 7. By means of the template auxiliary 66, the worker can lift the right end of the connecting bar 2 slightly above the support head 63 of the second support 62 and then place the right end onto the support head 63 from above, see the second stage shown in fig. 8.

The placing of the connecting strip 2 on the support heads 61 and 63 is carried out in such a way that the left-hand end coupling region 20 of the connecting strip 2 in fig. 7 engages in a form-fitting manner with the receiving region 70 of the first support 60 (see also fig. 14 in particular for this purpose) and the right-hand end coupling region 20 of the connecting strip in fig. 7 engages in a form-fitting manner with the receiving region 70 on the support head 63 of the second support 62 (see also fig. 14 in particular for this purpose).

The

support members

60, 62, etc. as shown in fig. 7-17, respectively, have a locating tab 72 projecting upwardly at the center of the support heads 61, 63, etc., see particularly fig. 14 and 17. As can be seen clearly in fig. 13 and 14, the connecting strip 2 is inserted with its vertical base edge 6 into the space between the second wall part 54 and the positioning projections 72 of the support heads 61 and 63 in such a way that the positioning region 26 of the connecting strip 2 abuts with its side 29 facing away from the vertical base edge 6 against the second wall part 54. During the engagement of the left-hand end coupling region 20 of the connecting strip 2 with the receiving region 70 of the support head 61 in fig. 7, both pegs 21 of this end coupling region 20 enter the receiving cavity between the two substantially vertical claws 74 of the support head 61. This is shown in the upper right of fig. 15. It is also conceivable for four claws 76 as shown in fig. 17 to also be present substantially in mirror image form on the other side of the support head 61, i.e. behind the positioning projections 72 and behind the vertical base edge 6 of the connecting strip 2 which covers the claws 74. As a result of the two pegs 21 snapping into the two receiving chambers, a positive engagement between the connecting strip 2 and the support head 61 is achieved there with regard to forces acting in the longitudinal direction of the connecting strip 2.

As shown in fig. 15 in particular, the connecting strip 2 projects slightly at the right end (left end in fig. 7 to 12) in the longitudinal direction of the connecting strip 2 beyond the receiving region of the support head 61 which contains four of these claws 74. This makes it possible to set up the connecting strip 2 with its end against the first wall part 52. The connecting strip 2 covers the entire width of the first supporting head 61 measured in the longitudinal direction of the connecting strip 2.

As far as the second support head 63 of the second support 62 is concerned, the terminal coupling region 20 of the connecting strip 2 there only uses the peg 21, which is closer to the end of the connecting strip 2, for engagement with the receiving region 70 of the second support head 63. Only the gap between the two jaws 74 of the support head 63 is used for this engagement. The gap between the other two claws 74 on the side of the second support 62 facing the second wall part 54 is (initially) unoccupied. The connecting strip 2 covers only half of the width of the support heads 63 measured in the longitudinal direction of the connecting strip 2. Even with the use of only half the width of the support head, however, a positive-locking engagement between the connecting strip 2 and the support head 63 is achieved with regard to forces in the longitudinal direction of the connecting strip 2.

After the connecting strip 2 has been placed or removed onto the support heads 61 and 63 as described above, the lower end of the vertical base edge 6 of the connecting strip 2 rests against the bearing surfaces 78 of the support heads 61 and 63, see fig. 14. The peg 21 of the end coupling region 20 projects further downwards than the level of the bearing surface 78, which makes it easier for the end region 24 of the peg 21 to "penetrate" into the space between the two jaws 74. The vertical base edge 6 of the connecting strip 2 is locked between the positioning lug 72 and the room-facing side of the second wall part 54 in the direction according to the double arrow a in fig. 14, i.e. extending transversely to the longitudinal direction of the connecting strip 2. This fixing ensures that the vertical base edge 6 assumes a generally vertical orientation and that the top side of the horizontal base edge 4 of the connecting strip 2 lies in a horizontal plane. Since the connecting strip 2 is brought against the second wall 54 by its longitudinal edge or by the longitudinal edge of a further web 14 arranged thereon, a very narrow limit is provided for the penetration of liquid concrete between the second wall 54 and the connecting strip 2.

As can be seen particularly clearly in fig. 13 and 14, the connecting strip 2 (more precisely the horizontal base edge 4 thereof) covers substantially only half the width (measured transversely to the longitudinal extension of the connecting strip 2) of the associated

support head

61, 63, 81, so that the other half of this width can be covered by an edge region of a placed floor formwork panel 40 or by two

corner regions

90 and 92 of two floor formwork panels 40 placed side by side. The top sides of the connecting strips 2 and the top side of the floor formwork panels 40 are in the same plane and together form a partial area of the molding surface for the concrete in a directly adjoining manner.

It can be seen that the first and

second supports

60 and 62 are provided with adjustability with respect to the height position of the support heads 61 and 63, as is customary with respect to formwork supports, which in the embodiment shown is effected by means of an external thread on the upper end region of the lower support section 85 and an internally threaded sleeve 82 in threaded engagement with the external thread, the upper end side of which sleeve acts on a bolt 84, which bolt 84 passes through one of a plurality of horizontal bores in the upper support section 86. This can be seen particularly clearly in fig. 7, 15 and 16. This height adjustment of the

relative support head

61 or 63 carried out by rotating the internally threaded sleeve 82 is called "setting".

Before at least one section of the floor formwork is created, the

supports

60 and 62 are set such that the top side of the horizontal base edge 4 of the connecting strip 2 has a nominal height (the height of the bottom side of the floor to be cast) and extends generally horizontally between the two

supports

60 and 62.

In a third stage as shown in fig. 9, two further supports 80 are provided between the two

supports

60 and 62. The additional support member 80 is identical in construction to the

support members

60 and 62, but lacks the stabilizing device 64. For each of the two further supports 80, the support head 81 has been brought into positive-fitting engagement with one of the two intermediate coupling regions 22 by means of the receiving region 83. This engagement is best seen in fig. 16 and 17. A receiving region 83 (in the direction of view of fig. 17) for this engagement is delimited by claws 85 projecting in the left and right longitudinal direction, which are inclined outwards with the exception of the base region. A positioning lug 72 is also provided in the space between the two jaws 85, but it occupies the space between the two pegs 23 due to the relevant part of the height. The two pegs 23 each engage with their outer sides 87 (which point toward the ends of the connecting strip 2) exactly between the base regions of the two claws 85, so that the form-fitting engagement is achieved. The peg 23 does not project downwards beyond the vertical base edge 6 of the connecting strip 2. It can be seen from this that the receiving region 83 of the associated additional support 80 for the intermediate coupling region 22 of the connecting strip 2 embodied as a feed-in region is of a different design than the receiving region 70 described above for the end coupling region 20 of the connecting strip 2 embodied as a feed-in region.

Due to the engagement of the support head 81 of each of the two further additional supports 80 with the intermediate coupling region 22, there must be a central distance of 1m between the two further additional supports 80, and the additional support 80 on the right in fig. 9 must have a central distance of 1m from the support 62. Between the support 60 and the additional support 80 on the left in fig. 9, the center distance is slightly less than 1m (because the connecting strip 2 completely covers the width of the support head 61 measured in the longitudinal direction of the connecting strip 2). The

coupling areas

20 and 22 of the connecting strip 2 are forced or defined by the engagement of the four support heads 61, 63, 81 of the four

supports

60, 62, 80 corresponding to the connecting strip 2, each spaced apart by said central distance. The additional supports 80 may each be separately installed by the operator. The additional supports 80 are all adjusted to the correct height.

As can also be seen in fig. 9, a holding element 86 is disposed on the second wall part 54. The holding element 86 has the design of a substantially vertically extending rail. The holding element 86 has at its upper end a flange 88 which is movable in the longitudinal direction of the holding element 86 and which, in the extended state, bears against the side of the vertical base edge 6 of the connecting strip 2 facing away from the second wall part 54 (see in particular fig. 16). In this way, the holding element 86 holds the connecting strip 2 relative to the second wall part 54.

In a fourth stage, shown in figure 10, the floor formwork panel 40 is suspended by two

corner regions

90 and 92 from the support head 61 of the first support 60 and the support head 81 of the additional support 80 adjacent thereto. As can be seen in particular in fig. 14, the four claws 76 arranged on the side of the associated

support head

61 or 81 facing away from the second wall part 54 have a division of the horizontal plane which projects upwards beyond the bearing surface 78 and, in addition, have a smaller flange 90 at the upper end in each case towards the connecting bar 2. This allows

corner regions

90 and 92 of floor form panel 40 to be hung into the spaces between locating tabs 72 and the upwardly projecting regions of jaws 76, respectively. The corner region 90 occupies the entire width of the support head 61 (measured in the longitudinal direction of the connecting strip 2), and the corner region 92 occupies only half the width of the support head 81 (measured in the same way). The suspended floor form panels 40 first hang downwardly.

In a fifth stage as shown in fig. 11, floor formwork panels 40 are deflected upwardly by means of formwork aids 66 through the other two

corner regions

94 and 96. Such a template aid 66 has been described above in connection with fig. 7. As can be seen more clearly in fig. 11, however, the bar-shaped template aid 66 is telescopically formed from two sections which are movable relative to one another, so that the effective length of the template aid 66 can be adjusted. With the aid of the formwork aids 66, the operator can pivot the floor formwork panel 40 into a substantially horizontal position or further upwardly. Another support member 80 is then positioned at the corner region 94 adjacent the first wall portion 52 (as a result, see the sixth stage shown in fig. 12). The support head 81 of the further support element 80 is designed like the support heads 61, 63, 81 described above, so that a positive-locking engagement between the corner region 94 and the support head 81 of the last-provided further support element 80 is possible.

It can also be seen in fig. 11 that two further floor formwork panels 40 have been hung on the support heads 81 or 63 of the two additional supports 80 or second supports 62 by means of two

corner regions

90 and 92, respectively. In a sixth stage as shown in fig. 12, the second formwork panel 40 has been deflected upwardly and a further support 80 common to the corner region 96 of the first formwork panel 40 and the corner region 94 of the second formwork panel 40 has been in place. It will be appreciated that the additional supports 80 in the second support row spaced from the second wall portion 54 by substantially more than one formwork panel length are so adjusted that the formwork panels 40 in the first row of formwork panels are each generally horizontal.

The floor form section shown in fig. 12 includes four

supports

60, 62, 80 located adjacent the second wall portion 54, a second row of supports 98 spaced from the second wall portion 54 in the manner described above, and three floor form panels 40. The partition may continue in the longitudinal direction of the second wall portion 54. For this purpose, a support comprising a stabilizing device is arranged in the vicinity of the second wall portion 54 at a distance substantially spaced apart by the length of the other connecting strip 2. This further connecting strip 2, which is aligned with the aforementioned connecting strip 2, is then placed on the two supports in the manner described hereinbefore. The construction of the first row of floor formwork panels 40 may then continue along the second wall portion 54.

A second, third or even more rows of floor form panels 40 may also be added to the floor form's section containing the first row of floor form panels 40. For this purpose, the floor formwork panels 40 are suspended and deflected upwards at the support heads 81 of the second row of supports 80 in the manner described above, and the upwardly deflected corner regions are supported by means of the supports 80. This allows continued work until (optionally with the aid of the fitting) the entire floor form is completed.

It is again emphasized here that the mentioned length of the connecting strip 2 and the number of

coupling regions

20 and 22 of the mentioned connecting strip 2 are implementation examples. According to the invention, it is also possible to use longer or shorter connecting strips 2. The number of

coupling areas

20 and 22 depends on which width of floor formwork panels and which number of floor formwork panels 40 the connector strip 2 is designed for. The connecting strip 2 may also have only two end coupling areas 20 and no intermediate coupling areas 22, i.e. the connecting strip 2 is designed for a single floor formwork panel width only. Furthermore, the connecting strips 2 can also be designed such that the coupling areas have different distances from each other, so that floor formwork panels 40 of different widths are connected to the same connecting strip 2.

The section removal or demolition will be performed in a reverse manner to the previous establishment of sections of the floor form. Only the removal or removal of the first row of floor formwork panels connected to the connector strip 2 will be described in detail herein. For this purpose, it is first of all stated that the support heads 61, 63, 81 of the

supports

60, 62, 80 each have a drop-off region 92, as can be seen in particular in fig. 14. After the gate 95 has been moved into the deflected lowered release position, the four catches 76 with the four flanges 90 can be deflected downward, for example by 30 °, together with the partial regions of the bearing surface 78. Thereby, the edge supports corresponding to the two

corner regions

90 and 92 of the associated floor form panel 40 are brought into a deeper position. The associated floor form panel 40 can be deflected downwardly through its two

corner regions

94 and 96 without the edge region of the formwork of the floor form panel 40 adjacent the connector strip 2 becoming buried in the poured floor concrete from below.

The removal of the left-most floor formwork panel 40 in figure 11 of the first row of floor formwork panels connected to the connecting strip 2 is only representatively described in detail herein. Floor formwork panels 40 in the other rows of floor formwork panels, and second 40 and third 40 floor formwork panels in the first row of floor formwork panels have been removed in a corresponding manner in advance.

Adjacent to the corner regions 94 and 96 (slightly further from the connecting strips 2 than the corner regions 94 and 96) there are alternative support elements, not shown, which support the cast floor slab there. The alternative support is a support comprising a support head having a substantially simplified structure compared to the support heads 61, 63, 81 described above; these simpler support heads are directed from below against the poured floor and support the floor there. Thus, the support head 81 of the support 80 (which support head 81 supports the corner regions 94 and 96) can be adjusted slightly downwards. A template aid 66 is attached. By releasing the shutter 95, the lowered sections 92 of the support heads 61 and 80, which engage the

corner sections

90 and 92, are lowered deflectively. Floor form panel 40 can now be deflected downwardly by means of form assist 66 through its

corner regions

94 and 96. The

corner regions

90 and 92 are then unhooked at the support heads 61 and 81 and the floor formwork panel 40 is removed.

Next, substitute supports are placed next to the

supports

60, 62, 80 of the first support row at a slightly greater distance from the second wall portion 54 than these supports, and are set up upwards against the poured floor. In many cases it is not necessary to provide such a replacement support, since the cast floor is already sufficiently supported there by the second wall portion.

The additional support 80 is first removed. For this purpose, its support head 81 is set slightly downwards. These additional supports 80 can then be easily removed. The retaining element 86 is removed. A separate assembly of end supports 60 and 62 and connecting strip 2 is now obtained and these components can be easily removed. The support heads 61 and 63 are slightly adjusted downward. The connecting strip 2 is removed by means of the template auxiliary 66 in the opposite way to the set-up operation.

Said removal of the sectors of the floor slab formwork is performed as a so-called "early demolition". This means that the formwork removal is performed on the cast concrete floor several days after the concrete is cast, before the concrete reaches its final strength by complete setting. All the supports described with complex support heads are in turn replaced with supports with simple support heads, which rest directly against the concrete floor from bottom to top, and these supports can then be removed one by one.

It is explicitly emphasized here that the described combination of connecting strips 2 and floor formwork panels 40 with

supports

60, 62, 80 with complex support heads 61, 63, 81 is only one of a number of possibilities. The connector bar 2 of the present invention may be combined with various types of support heads and with various types of floor formwork panels. In some early stripping methods, supports, for example provided with moving heads, for building the floor formwork are retained and the floor formwork panels are removed from these supports. The connecting strip 2 of the invention can also be used in this case. The connector bar 2 of the present invention may also be used with floor forms where early form removal is not desired.

Claims

1. A connecting strip for a floor slab formwork,

characterised in that the connecting strip has a plurality of coupling regions spaced apart from one another over its length for engagement with a support head of a formwork support.

2. The connecting strip according to claim 1, wherein,

characterized in that the connecting strip has, over its length, the coupling regions spaced apart from one another for positive engagement with the support head of the formwork support.

3. The connecting strip according to claim 1 or 2,

characterized in that the connecting strip has in each of its two longitudinal end regions an end coupling region for engagement with the support head of the formwork support.

4. The connecting strip according to claim 3, wherein,

characterized in that the end coupling regions are each configured such that, in the coupled state with the associated support head, the connecting strip selectively covers substantially only half the width of the support head measured in the longitudinal direction of the connecting strip or covers the width of the support head in its entirety.

5. Connection strip according to claim 3 or 4,

characterized in that the connecting strip has at least one intermediate coupling region between the two end coupling regions for engagement with the support head of the formwork support.

6. The connecting strip according to claim 5, wherein,

characterized in that the construction scheme of the at least one intermediate coupling zone is different from the construction scheme of the terminal coupling zones.

7. The connecting strip according to any one of claims 1 to 6,

characterised in that at least one of the coupling areas has an infeed area for engaging with the receiving area on the support head, or all coupling areas have an infeed area for engaging with the receiving area on the support head, respectively.

8. The connecting strip according to any one of claims 1 to 7,

characterised in that at least one of the coupling regions has a receiving region for engagement with a feed-in region on the associated support head, or all coupling regions have a receiving region for engagement with a feed-in region on the associated support head, respectively.

9. The connecting strip according to any one of claims 1 to 8,

characterized in that the connecting strip has, in cross-section, a base edge which is horizontal in use and a base edge which is vertical in use, and in that at least a part of the coupling region is positioned laterally on the base edge which is vertical in use.

10. The connecting strip according to any one of claims 1 to 9,

characterized in that the connecting strip is made substantially of metal.

11. The connecting strip according to any one of claims 1 to 10,

the floor slab is characterized in that the top side of the connecting strip is arranged as a part of the forming surface of the floor slab template.

12. The connecting strip according to claim 11, wherein,

characterized in that the connecting strip is provided with a formwork on the top side thereof.

13. The connecting strip according to any one of claims 1 to 12,

characterized in that the connecting strip has at least one abutment area, which is provided for abutment against the wall.

14. The connecting strip according to any one of claims 1 to 13,

characterized in that the coupling area has a distance such that: engagement with a support head of a formwork support can be achieved, the centre distance of the formwork support corresponding to the width of the floor formwork panel.

15. The connecting strip according to any one of claims 1 to 14,

characterized in that the connecting strip is configured such that, in the coupled state with the associated support head, it covers substantially only half of the width of the support head measured transversely to the longitudinal direction of the connecting strip.

16. An assembly having at least one formwork support for a floor formwork and a connecting strip according to any one of claims 1 to 15 coupled with the support head of the at least one formwork support,

characterized in that the connecting strip rests with its bottom side on the support head and in that one of the end coupling regions of the connecting strip engages with a counter-coupling region of the support head.

17. The assembly of claim 16, wherein the first and second end portions are,

the floor slab is characterized in that two formwork supporting pieces for a floor slab formwork are arranged, and the connecting strip is connected with the two formwork supporting pieces in the mode; and

at least one additional formwork support is arranged between the two formwork supports, wherein the connecting strip rests with its bottom side on the support heads of the additional formwork support, and the intermediate coupling region of the connecting strip engages with a counter-coupling region of the support heads of the additional formwork support.

18. Assembly according to one of the claims 16 to 17,

characterised in that the assembly also has at least one floor formwork panel which, at each of its two corner regions adjacent to the connecting strip, rests against and engages with the support head of the associated formwork support corresponding to the connecting strip.

19. The assembly of claim 18, wherein the first and second end portions are,

characterized in that the connecting strip has a height such that: such that the top side of the connecting strip is substantially in one plane with the top side of the at least one floor form panel.

20. Assembly according to one of the claims 16 to 19,

characterized in that the connecting strip covers substantially only half of the width of the support head of the at least one formwork support measured transversely to the longitudinal direction of the connecting strip.

21. Assembly according to one of the claims 16 to 20,

the formwork support part is characterized in that the support heads of the formwork support parts corresponding to the connecting strips are respectively provided with a descending area on one side facing at least one floor formwork panel, and the descending areas can descend relative to the rest parts of the support heads and are used for realizing the descending of two corner areas of the at least one floor formwork panel adjacent to the connecting strips.

22. Assembly according to one of the claims 16 to 21,

it is characterized in that the features "engaging" mentioned in claim 16 and/or the features "engaging" mentioned in claim 17 and/or the features "engaging" mentioned in claim 13 are embodied as features "form-fitting engaging".

23. A method of establishing at least one section of a floor slab formwork, said section having a connecting strip according to any one of claims 1 to 15, characterised by the steps of:

(a) arranging a first formwork support member beside the wall portion;

(b) -arranging a second formwork support alongside said wall portion and substantially spaced apart by a central distance given by said two end coupling regions of said connecting strip; and

(c) placing the connecting strip on the first and second formwork supports, wherein the end coupling regions of the connecting strip are respectively engaged with mating coupling regions of the support heads of the associated formwork supports, and wherein the engagement defines a center distance between the first and second formwork supports in a section of the floor formwork.

24. The method according to claim 23, characterized by the additional step of:

(d) providing at least one additional formwork support beside the wall portion between the first formwork support and the second formwork support, wherein an intermediate coupling area of the connecting strip is engaged with a counterpart coupling area of a support head of the at least one additional formwork support, and wherein the engagement defines a positioning of the at least one additional formwork support in the section of the floor formwork.

25. Method according to claim 23 or 24, characterized by the additional step of:

(e) a retaining element acting between the wall and the connecting strip is provided, which retaining element retains the connecting strip towards the wall.

26. The method according to any one of claims 23 to 25, characterized by the additional step of:

(f) one or more floor formwork panels of a row of floor formwork panels are respectively hung on the supporting heads of two adjacent formwork supports corresponding to the connecting strips through two corner areas, and then the one or more floor formwork panels are respectively deflected upwards through the other two corner areas which are not hung, and the one or more floor formwork panels are supported at least one corner area of the other two corner areas by means of the formwork supports.

27. A method of removing at least one section of a floor form, the section having a connector bar as claimed in any one of claims 1 to 15 and optionally one or more floor form panels adjacent the connector bar in a row of floor form panels, characterised by the steps of:

(g) optionally removing the one or more floor formwork panels adjacent to the connecting strip;

(h) optionally removing the at least one additional formwork support corresponding to the connecting strip; and

(i) removing the first and second template supports from the support heads thereof

The connecting strip, and removing the first and second formwork supports.