Balance beam

Abstract

A balancing beam for accommodating formwork elements, in particular formwork panels, comprises: an outer beam, which has a bearing surface facing upwards in the application case and a base surface facing downwards in the application case; at least one inner beam, which has an additional bearing surface facing upwards in the application case and an additional base surface facing downwards in the application case; at least one fixing element; wherein the outer beam has a groove extending in its longitudinal direction for accommodating the inner beam, and the inner beam is movably supported in the groove of the outer beam, and the fixing element is configured to fix the position of the inner beam relative to the outer beam, wherein the fixing is implemented in a releasable manner by the fixing element, and the fixing element at least partially penetrates the outer beam and the inner beam during the fixing process, and wherein the bearing surface and the additional bearing surface are arranged in the same plane, which plane delimits the balancing beam from above in the application case, and wherein at least two pillar interfaces for connecting to pillars are provided on the base surface, and at least one pillar interface is provided on the additional base surface.

Description

Technical Field

[0001] The invention relates to a balancing beam for accommodating formwork elements, in particular formwork panels, comprising an outer beam having a load-bearing surface facing upwards in the case of application and a base surface facing downwards in the case of application, and comprising at least one inner beam having an additional load-bearing surface facing upwards in the case of application and an additional base surface facing downwards in the case of application. The balancing beam also comprises at least one fixing element. The outer beam has a groove extending in its longitudinal direction for accommodating the inner beam, and the inner beam is movably supported in the groove of the outer beam. The fixing element is arranged to fix the position of the inner beam relative to the outer beam. The invention also relates to a floor formwork system, comprising at least one balancing beam and at least two pillars arranged substantially at right angles to the balancing beam. Background Art

[0002] The present invention relates to the field of construction. When a building is constructed or renovated, a building part is usually formed by pouring concrete. The shape of the poured building part is given by a template, wherein the template is set up on the construction site before pouring. In particular, the floor slab or floor slab of the building is set up by means of a template. For the construction and positioning of such a template, there are various types of template systems, which essentially send the template elements into the desired position and fix them there. These template systems include vertically extending pillars and horizontally extending beams, wherein the actual template elements are directly or indirectly applied to the beams. Known template systems are based on standard components, which are intended to accommodate and fix the standard dimensions of the template elements. When manufacturing a floor slab or a floor slab, standard components are usually used to position most of the required templates. Usually, the size of the building part in which the floor slab is to be created cannot be completely covered by the standard components of the template. Edge areas where the template cannot be set with standard components will be left, because the building part has an irregular shape, for example. But in order to establish a coherent floor slab, it is also necessary to set the template elements in these edge areas, which are also particularly related to the corners of the building part. The size and shape of the template elements required for the edge area are formed from the standard components by cutting or other means. Usually, the formwork elements for edge or corner areas are positioned and fixed by means of beams that are individually manufactured for this specific application, wherein these individual beams are connected to the pillars. A disadvantage of this process is that it is time-consuming to manufacture the individual beams for setting up the formwork for edge or corner areas. In addition, there is a risk that the individual beams manufactured under time pressure may not meet the static requirements for casting the building part, and there is a risk that this individually manufactured formwork system will break down.

[0003] From EP 2 982 813 A1, a beam for formwork is known, which is designed to be adjustable in length. However, the proposed beam is only suitable for the edge areas of floor formworks with smaller dimensions, because the connection with the vertically extending struts can only be carried out at their ends.

[0004] From ES 2302655 A1, another length-adjustable beam is known, which can be used for the edge area of ​​a floor formwork. This beam consists of many different parts and is therefore complicated to manufacture. Summary of the invention

[0005] The object of the invention is therefore to provide a solution with which edge regions of templates having different dimensions can be easily and reliably positioned and fixed.

[0006] The object of the invention is achieved by a balancing beam for accommodating formwork elements, in particular formwork panels, the balancing beam comprising an outer beam, the outer beam having a bearing surface facing upwards in the case of application and a base surface facing downwards in the case of application, and comprising at least one inner beam, the inner beam having an additional bearing surface facing upwards in the case of application and an additional base surface facing downwards in the case of application, and comprising at least one fixing element. The outer beam has a recess extending in its longitudinal direction for accommodating the inner beam, and the inner beam is movably supported in the recess of the outer beam. The fixing element is arranged to fix the position of the inner beam relative to the outer beam, wherein the fixing is releasably carried out by the fixing element, and the fixing element at least partially penetrates the outer beam and the inner beam during the fixing process, and wherein the bearing surface and the additional bearing surface are arranged in the same plane, which delimits the balancing beam from above in the case of application. At least two connection interfaces for connecting to pillars are provided on the base surface, and at least one pillar interface is provided on the additional base surface. The balancing beam of the invention adopts an adjustable length embodiment, so that it can be matched to the dimensions required on the construction site. The balancing beam comprises an outer beam, which at least partially surrounds the inner beam that can be moved relative to the outer beam. The total length of the outer beam can be adjusted by moving the inner beam relative to the outer beam. In order to fix the set length of the balance beam, at least one fixing element is provided, which fixes the position of the inner beam relative to the outer beam. In order to set the desired length of the balance beam, the fixing element can be removed or deactivated, so that the inner beam can move relative to the outer beam. Once the desired length is set, the fixing element is activated, wherein in the activated state, i.e. in the state in which the set length of the balance beam is fixed, the fixing element at least partially penetrates the outer beam and the inner beam. By at least partially penetrating the outer beam and the inner material, a releasable fixation is achieved by a form fit in combination with the fixing element. The outer beam of the balance beam of the invention has a plurality of faces. The application situation refers to the situation in which the balance beam of the invention for accommodating and positioning formwork elements is installed or is installed on a building site. In the application situation, the balance beam is oriented in such a way that it can absorb loads from formwork elements arranged vertically above the balance beam. In the application situation, the balance beam is simultaneously oriented in such a way that the loads transmitted from the formwork elements can be transmitted to the pillars arranged below the balance beam. A typical application situation of the balance beam is its installation state in a floor slab formwork system. The outer beam has a groove in its interior, which is configured to accommodate the inner beam in a movably manner. The groove is arranged in the outer beam in the longitudinal direction of the outer beam. The groove in the outer beam can be implemented in an integral or multi-component manner. In this case, the groove at least partially forms a negative shape relative to the inner beam. Therefore, the outer cross section of the inner beam fits into the inner cross section of the groove of the outer beam with the clearance required for the movability of the two beams relative to each other. The at least partial form fit between the outer beam and the inner beam ensures the precise guidance of the inner beam in the outer beam. In addition, there is a good force or load transfer between the outer beam and the inner beam and vice versa. The outer beam has a load-bearing surface that faces upward in the application.This bearing surface is designed to directly accommodate formwork elements, such as formwork panels. The bearing surface thus forms a surface on the outer beam, through which the load is introduced from the formwork carried by the balance beam into the outer beam. Advantageously, the bearing surface is implemented in a large area and extends over the entire length of the outer beam. On the side of the outer beam opposite to the bearing surface, a base surface is provided, which faces downwards in the case of application. This base surface is designed to connect the balance beam to a supporting element. For example, the base surface can be connected to a scaffolding support, which supports the balance beam in the desired position. Therefore, the base surface is designed to conduct loads or forces from the balance beam. Similarly, the inner beam has an additional bearing surface that faces upwards in the case of application, which is also used to absorb loads. In addition, the inner beam has an additional base surface that faces downwards in the case of application and is arranged opposite to the additional bearing surface, which is used to conduct loads from the balance beam. According to the invention, in the case of application, when the inner beam is at least partially inserted into the outer beam, the bearing surface and the additional bearing surface are arranged in the same plane. The bearing surface and the additional bearing surface thus form a common continuous plane, through which loads from the abutting formwork elements can be absorbed. At the same time, the plane defined by the bearing surface and the additional bearing surface delimits the balance beam from above in the case of application. This means that no other elements of the balance beam protrude upwards from this common plane and do not hinder the laying of the formwork elements. The balance beam according to the invention thus has a plane delimiting the balance beam from above in the case of application, which is formed by two surfaces, the bearing surface and the additional bearing surface, which are movable relative to each other. Formwork elements, such as formwork panels, can be laid directly on the bearing surface and the additional bearing surface in a planar manner and without intermediate elements, wherein this direct support ensures an excellent load transfer. At least two support interfaces for connecting to the support are provided on the base surface of the outer beam, and at least one support interface is provided on the additional base surface of the inner beam. The balance beam according to the invention has at least three support interfaces, which are arranged to be connected to the support, by which the loads introduced into the balance beam via the formwork are re-dissipated from the balance beam. Two of these support interfaces are arranged on the outer beam, in particular at its ends. In general, the outer beam is more stable than the telescopic inner beam. In this way, the main load introduced into the balance beam via the abutting formwork elements is absorbed and transmitted by the outer beam. In every application case on a construction site, an outer beam with two support interfaces is used in the load removal process. The inner beam is used to adapt the balance beam to different sizes, which are given by the size of the required formwork. Therefore, the inner beam is moved relative to the outer beam until the total length of the balance beam matches the application. The fixing elements are then fixed or activated in this state. The pillars are arranged on the outer beam via two support interfaces of the outer beam. The inner beam has another support interface, which is also configured to be connected to the pillars. Through this third support interface located on the inner beam, in particular, the load introduced into the inner beam via the additional load-bearing surface is removed. Therefore, the third support interface located on the inner beam absorbs that part of the introduced load that is not absorbed by the outer beam.In common applications, struts are provided on all three strut interfaces of the balancing beam, which discharge the load downwards. However, if the inner beam is completely inserted into the outer beam in the application because the total length does not need to be increased, the balancing beam of the invention can also be connected to the struts via only two strut interfaces arranged on the outer beam. Therefore, the balancing beam of the invention has a strut interface layout that matches its respective length, which enables a distributed discharge of the absorbed load. Compared with the prior art, which usually only has two strut interfaces, the load is better distributedly discharged via the three strut interfaces.

[0007] According to one embodiment, the outer beam is rod-shaped and has sockets connected to the grooves at both of its end ends, and the inner beam can be inserted into the outer beam through these sockets located at the two end ends. In this embodiment, the sockets constitute the entrance to the groove located inside the outer beam. Since such sockets are provided at both opposite ends of the outer beam, the inner beam can be inserted into the two end ends of the outer beam. Wherein, the sockets are implemented to be as large or larger than the external cross-section of the inner beam. With the help of these two sockets, the inner beam can be inserted and positioned relative to the outer beam, either at one end of the outer beam or alternatively at the other opposite end, according to the individual needs on the construction site. Therefore, the balance beam according to this embodiment can be perfectly matched to the individual conditions of the application. Due to the insertability on both sides, the flexibility of arranging the pillars on the pillar interface is increased. When setting the formwork, it is important to consider where the necessary pillars can be set up for the balance beam. In a specific area where the floor formwork is set up, if it is necessary to set up an opening, such as a shaft located in the floor of the building part, it is not possible to place the pillars for fixing the floor formwork in this area. In this case, the inner beam can be inserted into the outer beam from the other side, thereby also changing the position of the support interface and thus the position of the support connected to the support interface. In most cases, this makes it possible to simply adjust the support layout to the current conditions.

[0008] It is further proposed that the bearing surface extends over the entire length of the outer beam and the additional bearing surface extends over the entire length of the inner beam, and that the bearing surface and the additional bearing surface are arranged to directly support one or more formwork elements. In this embodiment, the total bearing surface formed by the bearing surface and the additional bearing surface extends over the entire length of the balance beam. The total bearing surface is arranged to directly support one or more formwork elements, in particular one or more formwork panels. Since the total bearing surface always extends over the entire length of the balance beam, regardless of the positioning of the inner beam relative to the outer beam, the formwork elements laid onto the total bearing surface rest on the balance beam in a planar and uninterrupted manner. In this way, no stress peaks are generated at the surface boundaries. By means of the large-area, continuous support of the formwork elements along the entire balance beam, it is possible to dissipate loads from one or more formwork elements to the balance beam in an extremely good manner. Since the total bearing surface extends over the entire length of the balance beam, the laid formwork elements can have various sizes and, in particular, butt joints located at different positions. By means of the continuous overall support surface it is always ensured that mutually adjoining formwork elements always rest at their butt joints on the support surface and are thus reliably supported on the support surface.

[0009] According to an ingenious solution, the balance beam also includes a fixing strip, whose cross-sectional shape is at least partially the same as that of the inner beam and which can be inserted into the groove of the outer beam, wherein the groove has an undercut on its side facing the load-bearing surface, which undercut prevents the fixing strip from moving towards the load-bearing surface in the application. In this embodiment, a fixing strip is provided, which is used to lock the formwork elements laid on the balance beam. For example, the formwork elements laid on the load-bearing surface or the additional load-bearing surface of the balance beam can be fixed in their position by driving a nail through the formwork element into the fixing strip. Due to the shape of the fixing strip, it can be inserted into the groove provided in the outer beam. In this way, the inner beam and the fixing strip can be inserted into the groove. The fixing strip can also serve as a stop for the inner beam. Optionally, the fixing strip can be shaped in such a way that the fixing strip is prevented from moving out of the groove towards the load-bearing surface by the undercut of the groove in the outer beam. Such an undercut prevents the formwork element connected to the fixing strip from being removed from the fixing strip and thus from the load-bearing surface. However, it is not absolutely necessary for the undercut or the fixing strip to be locked into the undercut. The fixing strip can also be designed to be taken out of the groove toward the bearing surface and to be introduced into the groove. With the combination of fixing strip and groove designed in this way, one or more fixing strips can be introduced when the balancing beam is already positioned.

[0010] In another embodiment, the fixing strip has a fixing surface which, in the case of use, faces upward, wherein, in the state inserted into the outer beam, the fixing surface is flush with the support surface or is set back relative to the support surface. In this embodiment, the fixing strip has a fixing surface which is provided for feeding in connecting elements for connection to the formwork elements. In a simple embodiment, the fixing strip can be made of wood or plastic and the fixing surface serves as a driving surface for nails. In order to ensure the aforementioned continuous and flat overall support surface, the fixing surface is arranged flush with the support surface or is set back relative to the support surface.

[0011] According to one embodiment of the balance beam, the inner beam has a plurality of fixing openings which are arranged on the inner beam at a certain distance from each other in the longitudinal direction, and the outer beam has at least one fixing guide, wherein in order to fix the position of the inner beam in the outer beam, the fixing element is at least partially inserted into the fixing guide and into one of the fixing openings. In this embodiment, the inner beam is releasably fixed relative to the outer beam by the combination of the fixing openings in the inner beam, the fixing guide on the outer beam and the fixing element. In order to achieve the adjustability of the total length of the balance beam, a plurality of fixing openings which are arranged at a certain distance from each other are arranged on the inner beam. The position of the inner beam relative to the outer beam can be adjusted according to the distance between the fixing openings. When fixing the inner beam relative to the outer beam, the fixing element is at least partially inserted into both the fixing guide and into one of the fixing openings, so that a positive fit is formed.

[0012] In another embodiment, the fixing opening and the fixing guide are designed as cylindrical openings, and the fixing element is designed at least partially as a cylindrical pin. In this embodiment, which is particularly easy to produce, the fixing opening and the fixing guide are designed as openings with a cylindrical cross section. Such an opening can be produced simply by drilling or milling. Matching the opening, the fixing element is provided with a cylindrical outer cross section, which fits into the opening.

[0013] In an alternative embodiment, the fixing opening is implemented as a cylindrical opening, the fixing guide is implemented as an elongated hole, and the fixing element is implemented at least partially as a cylindrical pin. In this embodiment, the fixing guide is implemented as an elongated hole on or in the outer beam, wherein the elongated hole is arranged on the outer beam in the longitudinal direction. The position of the inner beam relative to the outer beam can be roughly adjusted by selecting the fixing opening on the inner beam. The fixing element is then introduced into the fixing guide implemented as an elongated hole and the selected fixing opening. Therein, a form fit is formed between the fixing opening and the fixing element. However, the fixing element is movable in the fixing guide because there is no form fit between the fixing element implemented at least partially as a cylinder and the fixing guide constructed as an elongated hole in the longitudinal direction of the outer beam. The fixing element can therefore move over the length of the elongated hole, thereby being able to accurately adjust the total length of the balance beam or accurately adjust the position of the inner beam relative to the outer beam. Therefore, the balance beam according to this embodiment can better adapt to the individual dimensions of a specific application. In a simple embodiment, the fixing element is implemented as a cylindrical pin or a flat pin. Such a fixing element can be flexibly fixed to the outer beam by means of a rope or a chain, thereby preventing the fixing element from being accidentally lost when the fixing element is not fed into the outer beam or the inner beam for fixing.

[0014] In addition, the outer beam has at least one coupling device and a coupling device receptacle, wherein the coupling device and the coupling device receptacle are arranged on mutually opposite sides of the outer beam, wherein the side surfaces of the outer beam are surfaces arranged at an angle, in particular at right angles, to the bearing surface and to the base surface, wherein the outer geometry of the coupling device is smaller than or equal to the inner geometry of the coupling device receptacle, so that the coupling device of one balancing beam can be inserted into the coupling device receptacle of another balancing beam, and the two balancing beams can be connected thereby. In this embodiment, at least one coupling device and at least one coupling device receptacle are provided on the outer beam, which are used to connect two or more balancing beams to each other. By means of the coupling device and the coupling device receptacle, a plurality of balancing beams can be connected at a small mutual distance in this way. Compared with a single balancing beam, the tilting stability of the composite is significantly increased by the mutual mechanical connection of two or more balancing beams. The tilting stability is the stability against tilting of the balancing beam, the formwork system and in particular the formwork element when applying the cast concrete. The coupling device and the coupling device receptacle are arranged on the side surfaces. These side surfaces are surfaces different from the bearing surface and the base surface described above. Usually, the side faces are at right angles to the bearing surface and the base surface, respectively. However, depending on the shape of the outer beam, the side faces may also be at different angles to the bearing surface and the base surface. In order to connect multiple balancing beams, a coupling device is usually provided on one side face, and a coupling device receiving portion is provided on the opposite side face. In the case where only two balancing beams need to be connected, the coupling device and the coupling device receiving portion may also be arranged on the same side face of the outer beam. In order to connect two outer beams, the coupling device of one outer beam is inserted into the coupling device receiving portion of the other outer beam. In order to achieve this insertion, the external geometric dimensions of the coupling device are less than or equal to the internal geometric dimensions of the coupling device receiving portion. Therefore, the external geometric structure of the coupling device can be inserted into the internal geometric structure of the coupling device receiving portion to achieve the connection.

[0015] According to a clever solution, the coupling device has a cylindrical outer cross section and the coupling device receiving part has a rectangular inner cross section. In this embodiment, the outer cross section of the coupling device fits into the inner cross section of the coupling device receiving part, but does not have the same shape. The outer cross section of the coupling device is cylindrical, while the inner cross section of the coupling device receiving part is rectangular, in particular square. When the coupling device is inserted into the coupling device receiving part, the two elements are abutted against each other at multiple positions, but there is also an area in the rectangular cross section in the coupling device receiving part where no part of the coupling device is present. The advantage of this is that a certain connection tolerance is given for dirt under harsh conditions of use on a construction site. If there is dirt in the inner cross section of the coupling device receiving part due to concrete residues, gravel or sand, when the coupling device is inserted, the dirt can be avoided to the area in the coupling device receiving part that is not occupied by the coupling device. In this way, slight dirt will not hinder the connection of the coupling device to the coupling device receiving part. Of course, other combinations of the outer cross section of the coupling device and the inner cross section of the coupling device receiving part can also be used, which leave an area for collecting dirt. Therefore, embodiments are not limited to cylindrical coupling devices and rectangular coupling device receptacles.

[0016] Furthermore, the coupling device receptacle has at least one locking element and the coupling device has at least one locking receptacle, wherein after the coupling device of one balancing beam has been introduced into the coupling device receptacle of the other balancing beam, the locking element can engage with the locking receptacle and prevent the coupling device from being separated from the coupling device receptacle in the introduced state. In this embodiment, the connection of the coupling device of one balancing beam to the coupling device receptacle of the other balancing beam can be locked, thereby preventing the two balancing beams from being separated accidentally. After the coupling device and the coupling device receptacle have been inserted together or connected in another way, the locking element of the coupling device receptacle is introduced into the locking receptacle of the coupling device. The locking element of the coupling device receptacle can be designed, for example, as a pivotable clip, which is arranged on the coupling device receptacle in a way that it cannot be lost. In combination with such a pivotable clip on the coupling device receptacle side, a simple, flat key surface can be provided on the coupling device, which engages with the region of the locking element designed as a clip. The advantages of the described solution are that the locking element and the locking receptacle are easy to install and cannot be lost accidentally. Alternatively, the locking element of the coupling device receiving portion is also formed by a flat pin, which can be inserted into the locking receiving portion formed by the cylindrical hole in the coupling device to achieve locking. Such a flat pin can also be prevented from accidental loss by being fixed on a wire or a chain, for example.

[0017] In one embodiment of the proposal, the coupling device and the coupling device receiving part extend out of the corresponding side surface of the outer beam at right angles. In this embodiment, the coupling device and the coupling device receiving part are both rod-shaped, i.e., the length of their longitudinal axis is greater than their width. The coupling device and the coupling device receiving part are arranged on the side surface of the outer beam in such a way that their longitudinal axis and the side surface are at right angles to each other. This right-angle arrangement with respect to the side surface ensures that when a plurality of balancing beams are connected, their bearing surfaces are located in one plane and are parallel to each other.

[0018] Advantageously, coupling devices and coupling device receptacles are provided on each side of the outer beam, wherein the coupling devices on the first side are arranged opposite to the coupling device receptacles on the second side, and the coupling device receptacles on the first side are arranged opposite to the coupling devices on the second side. In this embodiment, a coupling device and a coupling device receptacle are provided on each of the two side surfaces of the outer beam. A balancing beam designed in this way can be connected to another balancing beam by two connections consisting of coupling devices and coupling device receptacles. Such a connection at two positions of the outer beam is particularly stable. In order to realize the assembly of multiple balancing beams in a coupled manner, corresponding elements for connection are provided on each of the two side surfaces. Thus, a balancing beam can be connected to another balancing beam on both sides thereof. Preferably, the coupling device and the coupling device receptacle are arranged on the first side surface, and the coupling device receptacle and the coupling device are arranged in a mirror-inverted manner on the second side surface opposite to this first side surface. However, alternatively, the coupling device and the coupling device receptacle can also be arranged on each side in a mutually opposite manner.

[0019] In addition, the outer beam is formed by a profile element, wherein the profile element has at least two chambers, which are arranged overlappingly in the application. In this embodiment, the outer beam includes a profile element or is composed of a profile element. A profile element refers to an element with a constant cross-section extending along an axis or a curve. In order to manufacture the outer beam, a profile element with a complex profile extending along a linear axis is usually used. This type of profile element can be purchased on the market in various embodiments, which is composed of, for example, iron-based materials or aluminum. The advantage of the profile element is that, based on the principle of lightweight, it has high bending strength under the condition of low material demand. Therefore, the profile element is stable and light, which is particularly conducive to handling on a construction site. The profile element according to the described embodiment has at least two superimposed chambers in its cross section. These chambers form different areas in the profile element and can be used for different tasks. The two chambers are usually separated from each other by a partition. The overlapping layout of the chamber is particularly advantageous because the bending resistance of the outer beam to the load introduced on the bearing surface is thereby enhanced.

[0020] In another embodiment, the outer beam formed by the profile element has a third chamber, which is arranged below the two chambers in the application case. In this embodiment, the profile element has a further third chamber. This third chamber is preferably arranged below the first chamber and the second chamber. The third chamber serves to further increase the bending strength of the balance beam. In addition, the third chamber of the profile element can be used for other functions, for example for additional fixing or support of the outer beam in the formwork system.

[0021] According to an ingenious solution, the pillar interface of the outer beam is arranged on or in the second cavity, or on or in the third cavity, wherein the pillar interface in particular has an area formed by a groove or a projection of the second or third cavity. In this embodiment, the pillar interface of the outer beam arranged on the base surface is arranged on the edge of the second cavity or the third cavity that faces downward in the application. The pillar interface is always located on the base surface of the outer beam that faces downward in the application, which defines the outer beam from below. If the outer beam is formed by a molded part with two cavities, the pillar interface is arranged on the lower edge of the second cavity. Correspondingly, for an outer beam with three cavities, the pillar interface is arranged on the lower edge of the third cavity. The pillar interface is arranged to be connected to the pillar head of the pillar in the formwork system. Usually, the pillar interface has a certain geometry, which forms an interface that matches the corresponding counter-part of the geometry on the pillar head. The pillar interface therefore has a projection or a groove, which is arranged to be connected to the pillar head in a targeted manner. These projections or grooves can be produced by removing the material of the second or third cavity of the balance beam. This material removal can be carried out, for example, by laser cutting, milling, sawing or other machining methods.

[0022] Furthermore, the outer beam comprises at least one eyelet element which is arranged in a movably and fixable manner in the base surface, wherein the eyelet element is arranged in particular at least partially in the third chamber. In this embodiment, at least one eyelet element is provided on the outer beam. The eyelet element is arranged in or on the base surface and can be moved there in the longitudinal direction of the outer beam. The eyelet element can be fixed at different positions along the base surface. The eyelet element has an eyelet which can be connected to a member for tensioning, such as a rope or a chain. By means of the member for tensioning, the outer beam can be reinforced relative to other elements on the construction site in the case of application. The loads and forces introduced into the balance beam can be conducted away by this reinforcement in addition to being conducted away by the support interface. Thus, the stability of the positioning of the balance beam is additionally increased by means of this eyelet element. In addition to the eyelet, the eyelet element also has a fastening part which snaps into the lower chamber of the outer beam constructed as a profile element. The eyelet element is usually fixed movably in the third chamber, which also forms the base surface. In the embodiment of the outer beam with only two chambers, the eyelet element is attached in the second chamber which is downward in the application case.

[0023] In an advantageous construction scheme, the inner beam has at least two rods extending in its longitudinal direction, which are spaced apart from each other and connected at their ends by terminating elements. In this embodiment, the inner beam adopts a multi-component embodiment in the longitudinal direction. For this purpose, the inner beam has two rods that overlap and are arranged at intervals in the application. With the help of the structure of the inner beam consisting of two such rods, the bending strength of the inner beam in the application is enhanced. In addition, the two-part inner beam with a distance between the two rods extending in the longitudinal direction is light in weight and is therefore easy to transport. In this embodiment, the inner beam is also constructed according to the lightweight principle and has a high mechanical stability on the one hand to absorb the loads introduced through the additional bearing surface and a low weight on the other hand. The two rods extending in the longitudinal direction are fixedly connected at their end ends by terminating elements. The terminating elements position the two rods relative to each other.

[0024] In another embodiment, at least one pillar interface of the inner beam is arranged on one of the terminal elements. In this embodiment, at least one pillar interface of the inner beam is arranged on the terminal element. The end of the terminal element facing downwards in the application forms part of the additional base surface and is therefore a suitable location for arranging the pillar interface. This pillar interface can also have a protrusion, a groove or other geometric shape, which is configured to be connected to the pillar head. However, the pillar interface can also be arranged alternatively or additionally on the lower rod of the two rods of the inner beam. Usually, the entire balance beam can be laid on the pillars of the formwork system with its face facing downwards in the application. As mentioned above, at least three pillar interfaces are provided. But in addition to this, pillars can also be installed at other positions to additionally support the balance beam at any position. Since additional pillars can be installed, the balance beam or the formwork system with the balance beam can be adjusted very flexibly according to different requirements on the construction site.

[0025] Furthermore, advantageously, at least one transverse connector is provided, which has two opposite ends, at each of which a joint is provided, and the outer beam has at least one transverse connector interface, which can be connected to a joint located on a first side of the transverse connector, and the joint located on the second side of the crossbeam connector can be connected to a transverse connector interface of another balancing beam, so that two or more balancing beams can be connected in a manner of being spaced apart from each other. In this embodiment, another scheme for connecting a plurality of balancing beams is provided. For this other connection scheme, at least one transverse connector is provided, which has joints at its two opposite ends. This joint is connectable to at least one transverse connector interface on the balancing beam. The opposite second joint of the transverse connector can be connected to a transverse connector interface of another balancing beam. In this way, two or more balancing beams can be connected in a manner of being spaced apart from each other. In this case, the transverse connector is implemented to be longer than the aforementioned combination of a coupling device and a coupling device receiving portion. Therefore, compared with the connection by the combination of a coupling device and a coupling device receiving portion, two or more balancing beams can be arranged at a greater distance from each other by means of the transverse connector. The transverse connector can be in the shape of a rod, and its length dimension is much greater than its width dimension. The cross section of the transverse connector can be circular, for example. Of course, other cross sections can also be adopted for the transverse connector.

[0026] The object of the present invention is also achieved by a floor formwork system, which comprises at least one balancing beam according to any one of the above embodiments and at least two pillars arranged substantially at right angles to the balancing beam. The pillars have a pillar head, and the pillar head of each pillar is connected to the pillar interface of the outer beam. The floor formwork system of the present invention comprises at least one balancing beam according to any one of the above embodiments. The balancing beam is arranged to directly support the formwork element, in particular the formwork panel. In the floor formwork system of the present invention, the balancing beam is positioned by at least two pillars oriented vertically in the application. The two pillars are arranged substantially at right angles to the longitudinal direction of the balancing beam. The pillars have a pillar head at their ends facing upward in the application, which are respectively connected to the pillar interface of the outer beam of the balancing beam. By connecting the pillar interface with the pillar head of the pillar, the stable positioning of the floor formwork system in the application is ensured.

[0027] In one embodiment, the pillar head of the pillar has at least one head receptacle, which at least positively accommodates a subarea of ​​the pillar joint, wherein the at least one head receptacle positively accommodates at least one recess or at least one projection of the pillar joint. In this embodiment, an at least partially positively-fitting connection is provided between the pillar interface and the head receptacle, which is a part of the pillar head of each pillar. With the aid of this positively-fitting connection, the balancing beam and the pillar head can be connected in a reproducible manner. By means of a corresponding arrangement of geometric elements, such as projections or recesses, a reproducible mobility of the balancing beam and the pillar relative to each other can also be achieved. For example, when constructing a floor formwork system, such geometric elements can be used to first suspend the balancing beam in the head receptacle of the pillar head. After the suspending, the balancing beam is guided relative to the pillar head by these geometric elements. Then, under the guidance of these first geometric elements, the balancing beam can be brought into the desired position, for which purpose it is usually folded upwards in a substantially horizontal direction. Then, the connection between the two elements can be locked and fixed in its position in a targeted manner by further geometric elements located at the pillar interface and the pillar head. In this case, the shaping of the pillar interface and the head receptacle can adopt different embodiments. However, according to the described embodiment, the shapes of the column interface and the head receptacle are matched to one another so that when the floor formwork system is used, a positive fit is produced at least partially between these elements. The positive fit can additionally be stabilized by means of elements having a press fit on the column interface or the head receptacle. Such elements having a press fit can be formed, for example, by a clamp.

[0028] Advantageously, a third support is provided, the support head of which is connected to the support joint of the inner beam. In this embodiment of the slab formwork system, a third support is provided, which is connected to the inner beam of the balance beam. This third support is required when the inner beam is at least partially pulled out relative to the outer beam and extends beyond the outer beam. In this case, the load absorbed by the inner beam is at least partially discharged through the third support connected to the support interface of the inner beam. The position of this third support relative to the other two supports connected to the outer beam varies with the pull-out length of the inner beam relative to the outer beam. By providing the third support connected to the inner beam, it is ensured that the load is reliably discharged from the entire balance beam. For this purpose, one of the two supports connected to the outer beam is usually arranged at the end of the outer beam extended by the inner beam. Therefore, this support is located in the transition area between the inner beam and the outer beam and absorbs the load there. It is thus ensured that the transition area where the inner beam extends from the outer beam is reliably supported and is not loaded or damaged due to bending stresses.

[0029] In another embodiment, at least two balancing beams are provided, which are connected to the support heads of the supports at two support interfaces, respectively, wherein the coupling device of one balancing beam is connected to the coupling device receiving portion of the second or further balancing beams. In this embodiment, the floor formwork system has more than one balancing beam. Therein, two or more balancing beams are connected by a combination of a coupling device and a coupling device receiving portion. By means of this connection, the at least two balancing beams provided are connected in a spaced-apart and mutually parallel manner. In this way, two or more balancing beams can be arranged side by side in a stable and reproducible manner. Such an arrangement of a plurality of balancing beams increases the stability of the floor formwork system. In addition, larger areas of the formwork, for example in the edge or corner area of ​​the building part, can be supported. Particularly advantageously, the balancing beams have an adjustable length, so that an excellent adjustment time can be achieved when adjusting the floor formwork system to various geometric structures of the required formwork. Of course, a plurality of balancing beams can also be alternatively or additionally connected to each other by transverse connectors, which are fixed by transverse connector interfaces located on the outer beams of the balancing beams.

[0030] Features disclosed in connection with the balancing beam are similarly disclosed in connection with the floor formwork system, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Embodiments of the present invention are schematically shown in the accompanying drawings.

[0032] Figure 1 is a perspective view of an embodiment of a balance beam of the present invention,

[0033] Figure 2 2 are top views of two embodiments of the balance beam of the present invention.

[0034] Figure 3 A partial perspective view of an outer beam of an embodiment of a balance beam of the present invention,

[0035] Figure 4 is a partial perspective view of one embodiment of the balance beam of the present invention connected to a support column head,

[0036] Figure 5 is a perspective view of an embodiment of the floor formwork system of the present invention,

[0037] Figure 6 A simplified perspective view of one embodiment of the floor formwork system of the present invention.

[0038] In the drawings, the same elements are indicated by the same reference numerals. Generally, the characteristics of the elements described for one drawing also apply to the other drawings. Directional descriptions such as up or down are based on the drawings being described and are carried over to the other drawings as appropriate. DETAILED DESCRIPTION

[0039] Figure 1 1 is a perspective view of an embodiment of a balancing beam 1 according to the invention. The balancing beam 1 comprises an outer beam 11, which faces right rearward in the illustration. An inner beam 12 is movably supported in the outer beam 11. The outer beam 11 is formed by a profile element made of a metal material. The profile element forming the outer beam 11 of the embodiment shown here comprises two chambers arranged one above the other. Figure 1 In the illustration of FIG. 1 , the balancing beam 1 is oriented as it would be in the case of use on the construction site or in the installed state in the slab formwork system 100. The surface delimiting the outer beam 11 from above is the bearing surface 111. The bearing surface 111 extends over the entire length of the outer beam 11 to both sides of the recess, which accommodates the inner beam 12. In the case of use, the formwork elements are laid directly onto the bearing surface 111. The surface delimiting the outer beam 11 from below is the base surface 112, which is Figure 1The base surface 112 is a surface that is provided for connection with a support 2, which guides the load out of the balance beam 1. On the end of the outer beam 11 that faces the observer in the front, and on the opposite end, a support interface S is provided on the base surface 112. The support interface S is provided for directly or indirectly connecting the balance beam to a support, which has a support head 21 that matches the support interface S. In general, loads can be introduced into supports positioned at any position via the base surface 112 that also extends over the entire length of the outer beam 11. The two support interfaces S are provided for at least partially form-fitting connection with specific supports of the floor formwork system 100. Supports with a flat surface facing upward without a special interface can be provided at other positions on the base surface 112, for example between the support interfaces S, at any position. The balance beam 1 can therefore also be combined with a simple auxiliary tool for constructing a floor formwork. The outer beam 11 has a groove in the longitudinal direction in its interior. In the case shown, this groove is formed by two cavities. The outer beam has a socket at each of its two end ends, which is connected to the groove. In the illustrated case, the inner beam 12 is inserted into the outer beam 11 through the socket facing the left front. Alternatively, the inner beam 12 can also be inserted at the opposite end of the outer beam 11. The inner beam 12 is bounded from above by an additional bearing surface 121, which extends over the entire length of the inner beam 12. On the side facing downward, the inner beam is bounded by an additional base surface 122, which also extends over the entire length of the inner beam 12. On the front end of the inner beam facing the observer, another support interface S is provided on the additional base surface 122. The inner beam 12 comprises two rods 124a and 124b arranged parallel to each other and at a certain distance. These rods 124a, 124b are connected at their two ends respectively by a terminal element 124c. The additional bearing surface 121 is arranged on the upper rod 124a. A plurality of fixing openings 123 are provided in the lower rod 124b, which are implemented as round holes here. The fixing openings 123 are arranged at regular intervals from each other and serve to releasably fix the inner beam 12 in the outer beam 11. A fixing guide 113, which is designed as an elongated hole, is provided on the outer beam 11. The fixing guide 113 is located in one of the two side surfaces, which are arranged at right angles to the support surface 111 and the base surface 112. A fixing element 13, which is designed as a cylindrical pin, is inserted into the fixing guide 113 and into one of the fixing openings 123. The fixing element 13, in combination with the fixing opening 123 and the fixing guide 113, establishes a connection between the outer beam 11 and the inner beam 12. In this way, the outer beam 11 and the inner beam 12 can be fixed relative to each other. The fixing element 13 can extend in the longitudinal direction of the beam over the length of the fixing guide 113, which is designed as an elongated hole. As a result, the length of the balancing beam can be precisely adjusted when the fixing element 13 is inserted.Of course, the fixing guide 113 can also be implemented as a cylindrical hole, but in this case, the length of the balance beam 1 cannot be adjusted accurately. On the side facing the observer, a coupling device 114 is provided at the front end of the outer beam 11, which consists of a welded pipe with a perfectly rounded outer cross section. At the rearward end of the outer beam, a coupling device receptacle 115 is installed on the same side, which consists of a welded pipe with a rectangular inner cross section. The coupling device 114 and the coupling device receptacle 115 are used to connect two or more balance beams 1. The coupling device 114 and the coupling device receptacle 115 can also be present on opposite sides of the outer beam 12. At the rearward end of the outer beam 12, a fixing strip 14 is inserted into the groove. This fixing strip 14 has a fixing surface 141 that is oriented upward. In the inserted state of the fixing strip 14, the fixing surface 141 is slightly retracted relative to the support surface 111. The fixing strip 14 can be moved in the groove of the outer beam 12 and is used to fix or fix the formwork elements laid on the balance beam 1. The fixing strip 14 is made of plastic. In order to fix the formwork element to the balance beam 1, nails can be driven through the formwork element into the fixing strip 14. Alternatively, the area of ​​the support surface 111 can also be designed as follows: the nails for fixing the formwork element can be driven directly into these areas of the support surface 111.

[0040] Figure 2 1 are top views of two embodiments of the balance beam 1 of the present invention. The balance beam 1 shown in the upper part corresponds to Figure 1 The balance beam 1 shown in the figure. On the downward side, a coupling device receiving portion 115 is provided at the left end of the outer beam 11, and a coupling device 114 is provided at the right end of the outer beam 11. Figure 2 The balance beam 1 shown in the lower part also has a coupling device 114 and a coupling device receiving portion 115, but these two elements are arranged on opposite sides with respect to the balance beam 1 shown in the upper part. In contrast to the balance beam 1 shown in the upper part, in the balance beam 1 shown in the lower part, the coupling device 114 is arranged at the left end of the outer beam 11 and the coupling device receiving portion 115 is arranged at the right end. Figure 2Starting from the state shown, the two balancing beams 1 can be moved towards each other until the two coupling devices 114 enter the two coupling device receptacles 115. In this way, a stable connection can be established between the two balancing beams 1. The connection is produced by two combined plug-in connections consisting of a coupling device 114 and a coupling device receptacle 115. In the connected state, the locking element 1151 of the coupling device receptacle 115 can be engaged with the locking receptacle 1141 of the coupling device 114 to lock the connection. In the case shown, the locking element 1151 is formed by a pivotable clamp, which is arranged on the coupling device receptacle 115 in a loss-proof manner. In the case shown, the locking receptacle 1141 is formed outside the coupling device 114 by a simple flat key surface. When the locking elements 1151 are closed, sections of these locking elements 1151 snap into the locking receptacle 1141 and thus fix the corresponding coupling device 114 in the corresponding coupling device receptacle 115. As Figure 2 As an alternative to the embodiment shown, the coupling device 114 and the coupling device receiving portion 115 may be provided on both sides of the outer beam 11. In this case, when the coupling device 114 and the coupling device receiving portion 115 are arranged on both sides, a plurality of balancing beams 1 can be connected in a manner of being parallel to each other and spaced a certain distance apart. In the application case, the tilt stability of such a composite body composed of a plurality of balancing beams 1 is higher than that of a single balancing beam 1.

[0041] Figure 3 It is a partial perspective view of an outer beam 11 of one embodiment of the balance beam 1 of the present invention. Figure 3 The end-side end of an embodiment of the outer beam 11 is shown. The outer beam 11 is designed as a profile element with a plurality of chambers K1, K2, K3. The first chamber K1 points upwards in the application and accommodates a part of the inner beam, in particular the upper rod 124a. The first chamber K1 has an opening to the support surface 111. This opening is designed so that dirt (for example concrete residues, sand or the like) that has penetrated into the chamber K1 can be removed from the chamber using simple tools. With the help of this opening, the fixing surface 141 of the inserted fixing strip 14 can also be reached. Such a fixing strip 14 is Figure 31. A second cavity K2 is provided below the first cavity K1, which is also used to guide a part of the inner beam 11, in particular, to guide the second rod portion 124b. In the embodiment shown, the two cavities K1 and K2 form the groove, which passes through the outer beam 11 in the longitudinal direction. A third cavity K3 is provided below the second cavity K2. The third cavity K3 is separated from the second cavity K2 by a partition wall. A base surface 112 is located on the downward edge of the third cavity K3. A support interface S is provided at the end side end of this base surface 112. The support interface S has a plurality of grooves S1 and a plurality of protrusions S2. The grooves S1 and the protrusions S2 together form the geometric shape of the support interface S, which is configured to be connected in a form-fitting manner with the support head 21. This shape of the support interface S with the grooves S1 and the protrusions S2 can be manufactured, for example, in the following manner: these elements are processed from the profile elements forming the outer beam 11 by laser cutting, milling or the like. In the embodiment shown, the profile element forming the outer beam 11 is made of an iron-based material or an aluminum alloy. The third chamber K3 has an opening to the base surface 112. Adjacent to this opening, an eyelet recess is provided inside the chamber K3, which is arranged to accommodate one or more eyelet elements 116. Such eyelet elements 116 are shown at the edge of the outer beam 11. In the third chamber K3, a fastening portion 1161 of the eyelet element 116 is provided, which is retained in the third chamber K3 by an undercut formed by the chamber K3 and its opening to the base surface 112. The actual eyelet 1162 is located below the base surface 112, which eyelet is fixedly or flexibly connected to the fastening portion 1161. The fastening portion 1161 can be moved along the third chamber K3 and thus brought to different positions. The fastening portion 1161 can be clamped in any position of the chamber K3 in a press fit manner, thereby fixing the position of the eyelet element 116. Through the eyelets 1162, the outer beam 11 can be connected or tensioned with other elements or building parts in the application. Through this tensioning, the load dissipation from the outer beam 11 can be further improved. It is also possible to arrange a plurality of eyelet elements 116 on the outer beam 11.

[0042] Figure 4 A partial perspective view of an embodiment of the balance beam 1 of the present invention connected to the support head 21. Figure 4 In the figure, one end of the balance beam 1 can be seen. The inner beam 12 extends out of the outer beam 11. Figure 4It can be clearly seen that the bearing surface 111 and the additional bearing surface 121 form a common plane for supporting the formwork element. Below the left end of the balance beam 1, a part of the support head 21 of the support 2 can be seen, which is connected to the balance beam 1 via two support interfaces S. At the end of the outer beam 11 facing the left, a first support interface S is provided, which forms a positive fit with a part of the head receptacle 211 of the support head 21. Due to this positive fit, the first support interface S cannot be removed from the support head 21. The support interface S of the inner beam is located at the left end of the inner beam 1. This second support interface S also forms a positive fit with the elements of the head receptacle 211 of the support head 21. Therefore, in the case shown, the support head 21 is connected to the two support interfaces S of the balance beam 1 in a positive fit. Alternatively, this connection can also be established by only one support interface S. The required positive fit is established by snapping the projection S2 and the groove S1 of the support interface S into each other with the elements of the head receptacle 211.

[0043] Figure 5 The floor formwork system 100 of the present invention is a perspective view of an embodiment. The floor formwork system 100 shown has a large number of standard elements of the floor formwork. A plurality of standardized formwork panels are arranged on standard beams, which are in turn held and positioned by pillars 2. At the right front edge of the floor formwork system 100, a recess can be seen, on which a balance beam 1 is arranged. At the position of the recess in the formwork element, geometric irregularities may exist in the building where the floor slab needs to be cast, for example. Therefore, the formwork element must be individually equipped for the recess. For this purpose, a balance beam 1 is used, which is supported on three pillars 2 here. Each of these pillars 2 has a pillar head 21, which is connected to the pillar interface S of the balance beam. Among them, two pillars 2 are attached to the pillar interface S of the outer beam 11, and one pillar 2 is attached to the pillar interface S of the partially retracted inner beam 11. The formwork element can be laid directly on the total bearing surface formed by the bearing surface 111 and the additional bearing surface 121. It can be clearly seen that the partially recessed balancing beam 1 has a different length than a standard beam. The balancing beam 1 can be adjusted to various lengths, thus allowing the edge areas of the slab formwork to be supported and positioned flexibly and individually.

[0044] Figure 6 FIG. 1 is a simplified perspective view of one embodiment of a floor formwork system 100 of the present invention. Figure 6A floor formwork system 100 is shown under construction, which is arranged in the corner of a room of a building. At the lower and right edges of the figure, formwork elements of standard dimensions have been laid onto the floor formwork system 100. In the case shown, the remaining corner, where formwork elements have not yet been laid, has dimensions that cannot be formworked with standard elements. Standard elements cannot be combined into the remaining shape and dimensions. In order to accommodate formwork elements in this remaining area, a plurality of balancing beams 1 have been installed there. In reality, the balancing beams 1 are each connected to a plurality of struts 2, but for the sake of clarity, this is not shown in the figure. Figure 6 These pillars are not shown in the figure. In the larger area of ​​the corners, where the formwork elements have not yet been laid, a total of seven balancing beams 1 are arranged, which have a mostly retracted inner beam 11. Among them, six of these balancing beams 1 are connected in pairs by a combination of a coupling device 114 and a coupling device receptacle 115. There is only a small distance between these balancing beams 1 connected in this way. These groups or pairs of balancing beams 1 are arranged at a greater distance from each other. For further stabilization, these groups or pairs can be connected to each other by transverse connectors, which are fixed to the corresponding sides of the balancing beam 1 by transverse connector interfaces. In Figure 6 Such transverse connectors are not shown in the figure. At the left edge of the remaining corner, in which formwork elements have not yet been laid, two further balancing beams 1 can be seen, which are arranged at right angles to the other seven balancing beams 1 in the top view. The balancing beams 1 can be arranged in various spatial directions, so that many different shapes of edge areas or corners of a room can be filled by a combination of balancing beams 1 with different orientations. This is a decisive advantage of the balancing beams 1 over the prior art, in which floor formwork systems usually consist of beams that can only be positioned relative to each other in one spatial direction or orientation. The balancing beams 1 in the floor formwork system 100 shown are therefore able to support and position formwork elements of various geometries. Figure 6 Starting from the state shown in , the individually cut formwork elements can then be applied to the positioned and locked balance beam 1. If necessary, these individual formwork elements can also be fixed on the balance beam 1, for example by means of a bonding Figure 1 One or more of the described fixing strips 14 are implemented. After the individual formwork elements have been applied to the equalizing beam 1, the slab formwork system 100 is constructed and the slab of the building section can be cast.

Claims

1. A balance beam (1) for accommodating a formwork element, comprising: - an outer beam (11) having a support surface (111) facing upwards in the case of application and a base surface (112) facing downwards in the case of application, - at least one inner beam (12) having an additional support surface (121) facing upwards in the case of application and an additional base surface (122) facing downwards in the case of application, - at least one fixing element (13), The outer beam (11) has a groove extending in its longitudinal direction for accommodating the inner beam (12), and the inner beam (12) is movably supported in the groove of the outer beam (11), and the fixing element (13) is arranged to fix the position of the inner beam (12) relative to the outer beam (11), wherein the fixing is implemented in a releasable manner by the fixing element (13), and the fixing element (13) at least partially penetrates the outer beam (11) and the inner beam (12) during the fixing process, and wherein the bearing surface (111) and the additional bearing surface (121) are arranged in the same plane, and the plane delimits the balance beam (1) from above in the application case, and wherein at least two pillar interfaces (S) for connecting to pillars are provided on the base surface (112), and at least one pillar interface (S) is provided on the additional base surface (122), The outer beam (11) has at least one coupling device (114) and a coupling device receiving portion (115), wherein the coupling device (114) and the coupling device receiving portion (115) are arranged on mutually opposite side surfaces of the outer beam (11), wherein the side surface of the outer beam (11) is a surface arranged at a certain angle to the support surface (111) and the base surface (112), wherein the outer geometry of the coupling device (114) is smaller than or equal to the inner geometry of the coupling device receiving portion (115), so that the coupling device (114) of one balancing beam (1) can be inserted into the coupling device receiving portion (115) of another balancing beam (1), and the two balancing beams (1) can be connected thereby.

2. The balance beam (1) according to claim 1, characterized in that: The outer beam (11) is rod-shaped and has sockets connected to the grooves at its two end portions, and the inner beam (12) can be inserted into the outer beam (11) through the sockets located at the two end portions.

3. The balance beam (1) according to claim 1, characterized in that: The bearing surface (111) extends over the entire length of the outer beam (11), and the additional bearing surface (121) extends over the entire length of the inner beam (12), and the bearing surface (111) and the additional bearing surface (121) are arranged to directly support one or more formwork elements.

4. The balance beam (1) according to claim 1, characterized in that: The balancing beam (1) further comprises a fixing strip (14), the cross section of which at least partially has the same shape as that of the inner beam (12), and the fixing strip (14) can be inserted into the groove of the outer beam (11), wherein the groove of the outer beam (11) has an undercut on a side thereof facing the bearing surface (111), and the undercut prevents the fixing strip (14) from moving toward the bearing surface (111) in an application.

5. The balance beam (1) according to claim 4, characterized in that: The fixing strip (14) has a fixing surface (141) facing upwards in the application state, wherein when inserted into the outer beam (11), the fixing surface (141) is flush with the supporting surface (111), or the fixing surface (141) is retracted relative to the supporting surface (111).

6. The balance beam (1) according to claim 1, characterized in that: The inner beam (12) has a plurality of fixing openings (123) which are arranged on the inner beam (12) in a longitudinal direction in a manner spaced apart from each other by a certain distance, and the outer beam (11) has at least one fixing guide (113), wherein the fixing element (13) is at least partially fed into the fixing guide (113) and one of the fixing openings (123) to fix the position of the inner beam (12) in the outer beam (11).

7. The balance beam (1) according to claim 6, characterized in that: The fixing opening (123) and the fixing guide (113) are implemented as cylindrical openings, and the fixing element (13) is implemented at least partially as a cylindrical pin.

8. The balance beam (1) according to claim 6, characterized in that: The fixing opening (123) is implemented as a cylindrical opening, the fixing guide (113) is implemented as an elongated hole, and the fixing element (13) is implemented at least partially as a cylindrical pin.

9. The balance beam (1) according to claim 1, characterized in that: The side surface of the outer beam (11) is a surface arranged at right angles to the bearing surface (111) and the base surface (112).

10. The balance beam (1) according to claim 1, characterized in that: The coupling device (114) has a cylindrical outer cross section, and the coupling device receptacle has a rectangular inner cross section.

11. The balance beam (1) according to claim 1, characterized in that: The coupling device accommodating portion (115) has at least one locking element (1151), and the coupling device (114) has at least one locking accommodating portion (1141), wherein after the coupling device (114) of one balancing beam (1) enters the coupling device accommodating portion (115) of another balancing beam (1), the locking element (1151) can engage with the locking accommodating portion (1141) and prevent the coupling device (114) from being separated from the coupling device accommodating portion (115) in the inserted state.

12. The balance beam (1) according to claim 1, characterized in that: The coupling device (114) and the coupling device receiving portion (115) extend at right angles from corresponding side surfaces of the outer beam (11).

13. The balance beam (1) according to claim 1, characterized in that: The coupling device (114) and the coupling device accommodating portion (115) are arranged on each side of the outer beam (11), wherein the coupling device (114) on the first side is arranged opposite to the coupling device accommodating portion (115) on the second side, and the coupling device accommodating portion (115) on the first side is arranged opposite to the coupling device (114) on the second side.

14. The balance beam (1) according to claim 1, characterized in that The outer beam (11) is formed by a profile element, wherein the profile element has at least two chambers, including a first chamber (K1) and a second chamber (K2), which are arranged overlapping in the application case.

15. The balance beam (1) according to claim 14, characterized in that The outer beam (11) formed by the profile element has a third chamber (K3) which is arranged below the first chamber (K1) and the second chamber (K2).

16. The balance beam (1) according to claim 15, characterized in that The support interface (S) of the outer beam (11) is arranged on or in the second cavity (K2), or on or in the third cavity (K3), wherein the support interface (S) has an area formed by a groove (S1) or a protrusion (S2) of the third cavity (K3).

17. The balance beam (1) according to claim 15, characterized in that The outer beam (11) comprises at least one eye element (116) which is movably and fixably arranged in the base surface (112), wherein the eye element (116) is at least partially arranged in the third chamber (K3).

18. The balance beam (1) according to any one of claims 1 to 17, characterized in that The inner beam (12) has at least two rod portions (124a, 124b) extending in the longitudinal direction thereof, the rod portions being spaced apart from each other and connected at their ends by a terminal element (124c).

19. The balance beam (1) according to claim 18, characterized in that At least one support interface (S) of the inner beam (11) is arranged on one of the terminating elements (124c).

20. The balance beam (1) according to any one of claims 1 to 17, characterized in that At least one transverse connector is provided, which has two opposite ends, and joints are respectively provided at the ends, and the outer beam (11) has at least one transverse connector interface, which can be connected to the joint on the first side of the transverse connector, and the joint on the second side of the transverse connector can be connected to the transverse connector interface of another balancing beam (1), thereby, two or more balancing beams (1) can be connected to each other at a certain distance.

21. A floor formwork system (100), comprising - at least one balancing beam (1) according to any one of claims 1 to 20, - at least two struts (2) arranged substantially at right angles to the balance beam (1), in, The pillars (2) each have a pillar head (21), and the pillar head (21) of each pillar (2) is connected to a pillar interface (S) of the outer beam (11).

22. The floor formwork system (100) according to claim 21, characterized in that: The pillar head (21) of the pillar (2) has at least one head receptacle (211) which receives at least a partition of the pillar interface (S) in a form-fitting manner, wherein the at least one head receptacle (211) receives at least one groove (S1) or at least one protrusion (S2) of the pillar interface (S) in a form-fitting manner.

23. The floor formwork system (100) according to claim 21, characterized in that: A third pillar (2) is provided, the pillar head (21) of which is connected to the pillar interface (S) of the inner beam (12).

24. The floor formwork system (100) according to any one of claims 21 to 23, characterized in that: At least two balancing beams (1) are provided, which are respectively connected to the support head (21) of the support (2) at at least two support interfaces (S), wherein the coupling device (114) of one balancing beam (1) is connected to the coupling device receiving portion (115) of the second or other balancing beams (1).

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