Scaffold crossbar and scaffold section

Abstract

The invention relates to a scaffold crossbar, in particular for being installed in a horizontal orientation in a scaffold section, the scaffold crossbar comprising: at least one crossbar beam which is of rod-like form and which extends in the direction of a longitudinal axis, wherein the crossbar beam has two opposite ends in the direction of the longitudinal axis, and at each of these two ends there is arranged a connection interface that is provided for connection to a scaffold element. The scaffold crossbar furthermore comprises at least two brackets which each extend along a bracket axis, wherein the brackets each have two opposite ends in the direction of the bracket axis thereof, wherein one of said ends of each bracket is connected to the crossbar beam; and at least two fasteners, of which in each case one is arranged at that end of a bracket which is situated opposite the connection of said bracket to the crossbar beam. The two connection interfaces of the at least one crossbar beam and the two fasteners together provide at least four connection points for connecting the scaffold crossbar to further scaffold elements, and the connection interfaces differ in terms of the form and size of the fasteners. The invention furthermore relates to a scaffold section having a scaffold crossbar, and to a method for constructing such a scaffold section.

Description

[0001] Scaffolding waler and scaffolding section

[0002] The invention relates to a scaffolding waler, in particular for horizontally oriented installation in a scaffolding section, comprising at least one waler support which is rod-shaped and extends in the direction of a longitudinal axis, wherein the waler support has two opposite ends in the direction of the longitudinal axis and at each of these two ends a connection interface is arranged, which is provided for connection to a scaffolding element. The scaffolding waler further comprises at least two booms, which each extend along a boom axis, wherein the booms each have two opposite ends in the direction of their boom axis, wherein one of these ends of each boom is connected to the waler support, and at least two closures, one of which is arranged at the end of a boom which is opposite the connection of this boom to the waler support.The two connection interfaces of the at least one transom support and the two closures together provide at least four connection points for connecting the scaffold transom to other scaffold elements. The connection interfaces differ in shape and size from the closures. The invention further relates to a scaffold section with a scaffold transom and a method for constructing such a scaffold section.

[0003] Scaffolding is used for various tasks in the construction industry. Facade scaffolding is used to design the exterior surfaces of buildings, for example, for painting. Facade scaffolding is usually constructed using facade scaffolding frames as its main components; more recently, it has also been constructed using modular scaffolding. In civil engineering, falsework is used to position and hold various structural components. Such structural components can be, for example, precast concrete elements, steel beams, or steel structures. Furthermore, elements required for the construction of buildings, such as temporary structures or formwork, can be positioned using falsework. Finally, scaffolding is also used in service or inspection areas, for example, to safely transport workers to the parts of the plant requiring overhaul in large process plants such as refineries.In general, the basic requirements for scaffolding are that they are easy to transport and easy to assemble.

[0004] Many scaffolds have a modular design, which means that different shapes and sizes of scaffolds can be assembled from standard components using a modular principle. There are usually standard components that are mainly used vertically when erecting a scaffold, and other standard components that are mainly used horizontally. Vertically oriented standard components are usually referred to as vertical standards or scaffold standards. The horizontally oriented components that can be connected to them are often referred to as horizontal ledgers or scaffold ledgers. When erecting a scaffold or scaffold section, several scaffold standards are oriented parallel to one another and then connected with several horizontal ledgers oriented at right angles to them. The scaffold elements are connected via interfaces. In this way, scaffolds or scaffold sections with several levels can be easily erected.

[0005] There are applications in which a scaffold section or scaffold level is subjected to greater than usual loads. This can be the case, for example, with a scaffold section located at the bottom of a scaffold on which many further levels are arranged above. Higher loads can also occur if the scaffold or scaffold section is intended to hold and position structural parts or other heavy components. With such higher loads, the scaffold sections are subjected to greater bending stresses. In such cases, conventional modular scaffolds have the option of incorporating additional standard components as bracing to compensate for higher bending loads. This is usually achieved by installing several scaffold ledgers running parallel to one another in a horizontal direction between vertically oriented scaffold elements.The problem with this solution is that the number of connection interfaces for installing additional struts on the vertically oriented scaffolding elements is limited. It is therefore not always possible to increase the load-bearing capacity of a scaffolding section by installing additional horizontally oriented scaffolding elements, as in some cases there are no free connection interfaces for installing additional scaffolding elements. In such a case, an increased load-bearing capacity can only be achieved by using a different, more stable scaffolding system, which involves increased effort and higher costs.

[0006] The object of the invention is therefore to propose solutions with which the load-bearing capacity, in particular the bending strength, of a modular scaffolding section can be increased, whereby the number of scaffolding elements required should remain the same.

[0007] This object of the invention is achieved by scaffolding bars, in particular for horizontally oriented installation in a scaffolding section, comprising

[0008] - at least one bar support which is rod-shaped and extends in the direction of a longitudinal axis, wherein the bar support has two opposite ends in the direction of the longitudinal axis and at each of these two ends a connection interface is arranged which is intended for connection to a scaffolding element,

[0009] - at least two arms, each extending along a arm axis, wherein the arm axes are each oriented at an angle between 1° and 89° to the longitudinal axis and wherein the arms each have two opposite ends in the direction of their arm axis, one of these ends of each arm being connected to the locking beam,

[0010] - at least two closures, one of which is arranged at the end of a cantilever opposite the connection of this cantilever to the transom support, wherein the two connection interfaces of the at least one transom support and the two closures together provide at least four connection points for connecting the scaffold transom to other scaffold elements and the connection interfaces differ in shape and size from the closures, wherein each closure comprises a support element connected to the cantilever, which has a support surface which is oriented at least partially perpendicular to the longitudinal axis and points away from the respective cantilever in the direction of the longitudinal axis, and wherein each closure comprises a gripping element which is movably mounted to the support element and which has a gripping surface,which is oriented at least in regions perpendicular to the longitudinal axis and points in the direction of the longitudinal axis towards the respective boom, wherein between the support surface and the gripping surface in the direction of the longitudinal axis there is a distance which can be varied by a movement of the gripping element, which defines a gripping space which is intended to receive a scaffolding element, and wherein each closure comprises at least one clamping element which is movably connected to the support element and the gripping element, wherein the distance between the support surface and the gripping surface and thus the size of the gripping space can be varied by actuating the clamping element.

[0011] A scaffolding ledger according to the invention comprises a total of four connection points with which it can be connected to other scaffolding elements. These four connection points are arranged at a distance from one another. This makes the scaffolding ledger according to the invention suitable for absorbing greater forces and moments acting in a scaffolding section than known horizontal ledgers. These four connection points are formed by two connection interfaces arranged on a ledger beam and by two locks, each arranged on a cantilever. The two connection interfaces are preferably of identical design and differ from the locks, which are also preferably of identical design.

[0012] The scaffolding ledger according to the invention comprises a preferably horizontally installed ledger beam, which is designed in a rod-shaped manner. This means that the length of the ledger beam is significantly greater than its width and thickness. The ledger beam extends along a longitudinal axis and has a connecting interface at each of its opposite ends. The ledger beam with the two connecting interfaces essentially corresponds to a known horizontal ledger. The connecting interfaces are intended for connection to a scaffolding element, preferably a vertical post, and are shaped and dimensioned such that they can be connected to corresponding interfaces on the scaffolding element in a form-fitting and force-fitting manner. The connecting interfaces are designed such that they are compatible with the connecting interfaces of known horizontal ledgers.This allows the scaffolding ledger according to the invention to be easily integrated into an existing scaffolding system. To increase the load-bearing capacity, particularly with regard to the dissipation of forces and moments, at least two outriggers are attached to the ledger beam, each of which is fitted with a lock. The two locks also serve as a connection point to a scaffolding element and differ in shape, size, and function from the connection interfaces on the ledger beam. Each of the outriggers extends along an outrigger axis, with each outrigger axis being oriented at an angle of between 1° and 89° to the longitudinal axis of the ledger beam. This means that the two outriggers extend at an acute angle relative to the ledger beam. The outriggers can either be rigidly connected to the ledger beam, or the angle between an outrigger axis and the longitudinal axis can be adjustable or variable.The two cantilever axes can be arranged in one plane, on the same side of the transom beam. Alternatively, it is also possible for the two cantilever axes to be arranged in the same plane, but on different, opposite sides of the transom beam or the longitudinal axis. Each cantilever has two opposite ends, one of which is connected to the transom beam and the other to a lock. The cantilevers position the two locks at a distance from the transom beam and its longitudinal axis. Preferably, the transom beam is attached to a scaffolding element with a connection interface and a lock. Because the connection interface and the lock are arranged at a distance from each other, this connection can safely transmit forces and moments via two connection points. The connection interfaces and the locks differ from one another in shape and size.Both the connection interfaces and the closures can be based on different functional principles, which is shown in detail in the embodiments.

[0013] Each closure comprises a support element, preferably permanently connected to the respective boom. When connected to a scaffolding element, this support element is brought into contact with this scaffolding element and then rests against the scaffolding element with a support surface, at least in part. The support surface is oriented perpendicular to the longitudinal axis. Furthermore, each closure comprises a movable gripping element mounted on the support element, which, when connected to a scaffolding element via a gripping surface, also rests against this scaffolding element. The gripping surface is also oriented perpendicular to the longitudinal axis, at least in part. Between the gripping surface and the support surface there is a distance in the direction of the longitudinal axis, which distance can be varied due to the mobility of the gripping element. This distance between the two surfaces defines a gripping space, which is intended to receive a scaffolding element.The gripping space thus extends between the gripping surface and the support surface and is also adjustable in size due to the mobility of the gripping element. Each closure further comprises at least one tensioning element which is movably connected to both the support element and the gripping element. The tensioning element serves to move the gripping element relative to the support element and to tension it when the closure is connected to a scaffolding element. When the tensioning element is actuated, the distance between the support surface and the gripping surface changes and thus the size of the gripping space. The tensioning element can be based on various concepts which are described in detail in the following embodiments. In the scaffolding bar according to the invention, the support element which is firmly connected to the boom is preferably arranged on the inside and the gripping element which is arranged movably relative to the boom is arranged on the outside."Inside" refers to an arrangement in which the support element is located closer to the center of the bolt carrier in the direction of the longitudinal axis than the gripping element arranged on the outside. Of course, however, it is also possible for the support element fixedly connected to the boom to be arranged on the outside and the movably arranged gripping element to be arranged on the inside. The embodiments described below are each described for the first case, in which the fixed support element is arranged on the inside. The reversal of the function, in which the movably arranged gripping element is arranged on the inside, is also considered to be disclosed in an analogous manner.

[0014] Overall, the scaffolding waler according to the invention thus comprises four connection points, two of which are formed by known connection interfaces and two further ones by a closure each arranged at a distance from the connection interfaces. Through these four connection points, with which the scaffolding waler according to the invention can be connected in a scaffold section, the transferability of forces and moments by the scaffolding waler is significantly improved compared to a known horizontal waler. In particular, the spaced arrangement of the connection points enables a significantly improved transmission of moments. In this way, a single scaffolding waler according to the invention can transfer significantly more forces and moments without requiring additional interfaces to connect the known connection interfaces.By using a scaffolding ledger according to the invention in a scaffolding section, its load-bearing capacity can be improved without increasing the number of elements in the scaffolding section. A further advantage of a scaffolding ledger according to the invention is that existing and known interfaces on other scaffolding elements can still be used. The scaffolding ledger according to the invention can therefore be easily integrated into existing scaffolding systems. A particularly advantageous feature of the scaffolding ledger according to the invention is that the closures, with their gripping space arranged between a support surface and a gripping surface, can be easily connected to the outer surface of a scaffolding element designed as a vertical post. Thus, no additional or specially designed interfaces are required on this vertical post for connection to the scaffolding ledger.The scaffolding ledger according to the invention can therefore be very easily connected to existing scaffolding elements with its locks. Such a connection can be made at different points on the scaffolding element or vertical post, since no specially shaped counterpart needs to be provided on the scaffolding element for the connection to the lock. For example, it is also possible to arrange the outriggers so that they are on opposite sides of the ledger support. In this case, one of the locks is fastened above the connection of the connection interfaces to the scaffolding element and the other of the locks is fastened below the connection of the connection interfaces to the scaffolding element. This embodiment can also be installed without further measures with an existing scaffolding element that does not have any special interfaces for connecting to the scaffolding ledger.Furthermore, the scaffolding waler has a simple and compact design, and the locks provided according to the invention are easy and ergonomic to operate. The design of the scaffolding waler, with its waler support and the two outriggers connected at an angle to it, requires significantly less space in a scaffolding section than the parallel arrangement of two conventional horizontal walers, which can also be used to increase the load-bearing capacity of a scaffolding section. A scaffolding waler according to the invention thus impedes workers and work on the scaffolding section significantly less than when the load-bearing capacity of a scaffolding section is increased by two horizontal walers arranged parallel to each other.

[0015] In one embodiment, a distance is provided in the direction of the longitudinal axis between the gripping surface of each lock and the end face of the adjacent connecting interface of the bolt carrier. In this embodiment, the two gripping surfaces of the locks are arranged further outward in the direction of the longitudinal axis than the end faces of the connecting interfaces. This makes it possible for the end faces of the connecting interfaces to rest on the scaffolding element on a first side, while the gripping surfaces rest on a second side of the scaffolding element, opposite the first side.

[0016] In a further embodiment, the distance between the gripping surfaces of the opposing locks, in the direction of the longitudinal axis, is greater than the total length of the locking bar carrier with its two connecting interfaces. In this way, the locking bar carrier with the connecting interfaces can be installed between two parallel scaffolding elements, with the locks, in particular their gripping elements with the gripping surfaces, encompassing and securing the two scaffolding elements from the outside.

[0017] Furthermore, the distance between the support surfaces of the opposing locks, in the direction of the longitudinal axis, corresponds to the total length of the bolt carrier with its two connecting interfaces. The support surfaces, which are arranged on the support elements rigidly connected to the cantilevers, are spaced apart at a distance corresponding to the total length of the bolt carrier. In the direction of the longitudinal axis, the support surfaces are thus arranged flush with the end faces of the connecting interfaces.

[0018] In an advantageous embodiment, the gripping surface and / or the support surface are curved in some areas, with the axis of curvature of this curvature oriented perpendicular to the longitudinal axis and lying in a plane defined by the two cantilever axes. The gripping surface and / or the support surface are concavely curved. The radius of curvature of the surfaces preferably corresponds to the radius of the framework element to be connected to the closure. In this way, a large-area contact surface is achieved between the closure and the framework element, which ensures a stable connection between the two components.

[0019] In a further embodiment, it is provided that the gripping space extends along a gripper axis which is oriented perpendicular to the longitudinal axis and lies in a plane which is defined by the two boom axes, wherein the distance of the support surface to the gripper axis is constant and the distance between the gripping surface and the gripper axis can be changed by a movement of the gripping element, wherein the distance between the support surface and the gripping surface is smaller in a holding position of the closure than in an assembly position of the closure. The gripping space between the support surface and the gripping surface extends along an imaginary gripper axis. When the scaffolding bar is connected to a scaffolding element to form a scaffolding section, the longitudinal axis of the scaffolding element is oriented parallel or preferably coaxially to the gripper axis.The distance of the support surface to the gripper axis is constant, whereas the distance of the gripping surface to the gripper axis can be adjusted by moving the gripping element.

[0020] Advantageously, at least in the holding position, a gripping surface and a support surface together enclose the gripping space by at least 180° in the circumferential direction around the gripper axis. Enclosing the gripping space by at least 180° in the circumferential direction here means that, in the holding position, the support surface and the gripping surface together encompass the scaffold element by at least half of its circumference. These two surfaces preferably encompass the scaffold element by more than half, i.e., by more than 180° in the circumferential direction relative to the gripper axis. This achieves a secure positive connection between the closure and a scaffold element connected to it.

[0021] Cleverly, the two outriggers are located on the same side of the bolt carrier relative to a plane that runs through the longitudinal axis and is oriented perpendicular to the gripper axis. In this embodiment, the two outriggers are located on the same side of the bolt carrier. The two outriggers are arranged axially symmetrically to an axis that runs through the center of the length of the bolt carrier, perpendicular to the longitudinal axis.

[0022] In an alternative embodiment, the two arms are located on opposite sides of the bolt carrier relative to a plane that runs through the longitudinal axis and is oriented perpendicular to the gripper axis, in particular with the two arm axes being arranged in a common plane. In this alternative embodiment, the two arms are arranged opposite one another on the bolt carrier. The two arms can, for example, be arranged point-symmetrically to a point that lies on the longitudinal axis at half the total length of the bolt carrier.In one embodiment, the closure has a bearing that mounts the gripping element so that it can move linearly relative to the support element, wherein the direction of this linear mobility is oriented parallel to the longitudinal axis and / or the orientation of the gripping surface relative to the support surface is the same in the holding position and in the assembly position. In this embodiment, each closure has a bearing that enables the gripping element to be moved linearly relative to the support element. When the position of the gripping surface relative to the support surface changes, the orientation of these two surfaces relative to one another remains the same. In an alternative embodiment, which will be described later, the gripping element can also be mounted so that it can rotate relative to the support element.

[0023] Furthermore, it is provided that the clamping element is designed to be wedge-shaped at least in some areas in a plane perpendicular to the gripper axis, wherein a first side contour is designed to be linear and oriented perpendicular to the longitudinal axis and a second side contour is designed to be linear and oriented at an acute angle to the first side contour, wherein the first side contour rests on a partial area of ​​the support element which is oriented at an incline to a plane oriented perpendicular to the longitudinal axis and the second side contour rests on a partial area of ​​the gripping element which is oriented perpendicular to the longitudinal axis and the clamping element can be actuated by a movement perpendicular to the longitudinal axis,to change the distance between the support surface and the gripping surface and thus the size of the gripping area. In this embodiment, the clamping element is wedge-shaped in some areas. This wedge shape enables the translation of a linear movement into a linear movement in a different direction. The clamping element is actuated bythat it is inserted into the lock in a direction perpendicular to the longitudinal axis. Due to the wedge shape, this movement is translated into a movement of the gripping element parallel to the longitudinal axis. The insertion of the wedge-shaped area into the lock reduces the distance between the support surface and the gripping surface and thus clamps the scaffolding element in the gripping space when the scaffolding bar is connected to a scaffolding element. In this embodiment, the clamping element is very simple and robust and can be actuated in a simple linear movement. In addition or support, the clamping element can be actuated by hammer blows on one of its ends in order to establish or release a particularly strong connection between the lock and the scaffolding element. In an alternative embodiment,that the gripping element has, on its side facing away from the support surface, a partial area extending in the direction of the longitudinal axis, on which an external thread is arranged, and the clamping element has an internal thread which is connected to the external thread of the gripping element, in particular wherein the clamping element is designed as a cam nut, wherein a partial area of ​​the clamping element arranged perpendicular to the direction of extension of the internal thread bears against an outer surface of the support element oriented perpendicular to the longitudinal axis, and a partial area of ​​the gripping element arranged between the external thread and the gripping surface is mounted in a recess in the support element so as to be linearly movable in a direction parallel to the longitudinal axis, and the clamping element can be actuated by rotation about a rotation axis parallel to the longitudinal axis,to change the distance between the support surface and the gripping surface and thus the size of the gripping space. In this embodiment, the closure comprises a linear bearing between the gripping element and the support element. However, the clamping element in this embodiment is not wedge-shaped, but rather comprises an internal thread that is screwed onto an external thread arranged on the gripping element. The clamping element is preferably designed as a cam nut, which has several protruding cams on its outer circumference, which facilitate rotation of the clamping element. Hammer blows can also be applied to these cams to assist in this process.To clamp the clamping element particularly tightly. By rotating the clamping element relative to the gripping element and the support element, the distance between the support surface and the gripping surface is changed. In this embodiment, the clamping element can thus be actuated by a rotational movement about an axis parallel to the longitudinal axis.

[0024] Alternatively, it is provided that the closure has a bearing which mounts the gripping element so that it can rotate relative to the support element, wherein the axis of rotation of the bearing is oriented parallel to the gripper axis and / or the orientation of the gripping surface relative to the support surface in the holding position is different from the assembled position. In this embodiment, each closure comprises a bearing which guides and enables a rotating movement of the gripping element relative to the support element. The gripping element can therefore be folded towards or away from the support element. The axis of rotation of this bearing is oriented parallel to the gripper axis. When the scaffolding bar is installed with the longitudinal axis oriented horizontally, such a bearing enables a rotating movement of the gripping element in a horizontal plane. Such a rotatable bearing has the effect that the orientation of the gripping surface relative to the support surface in the stopping position is different from the assembled position.In the stop, these two surfaces are oriented in such a way that they enclose a scaffold element brought into the reach area at least partially around its circumference.

[0025] Cleverly, the gripping surface surrounds the gripping area in the holding position in the circumferential direction around the gripper axis at an angle of at least 90°, preferably at an angle of at least 180°, and the support surface surrounds the gripping area in the holding position in the circumferential direction around the gripper axis at an angle of at most 90°. In this embodiment, the support surface and the gripping surface encompass the gripping area to different extents in the circumferential direction. The support surface, which is arranged rigidly to the boom, encompasses the gripping area less than the gripping surface. This enables collision-free installation of the scaffolding cross member between two already assembled, parallel scaffolding elements. The movable gripping surface, on the other hand, is designed such that it encompasses a larger area of ​​its circumference in the holding position, in order to ensure a secure positive connection between the closure and the scaffolding element in the holding position.

[0026] Cleverly, it is provided that the support element has a guide surface which adjoins the support surface, wherein the guide surface is oriented at an acute angle to a plane which runs perpendicular to the longitudinal axis and is inclined in the direction of the boom, wherein the guide surface is set back from the support surface in the direction of the longitudinal axis, at least in some regions, and the support surface surrounds the gripping space in the holding position in the circumferential direction around the gripper axis at an angle of at most 100°. The guide surface in this embodiment facilitates the assembly of a scaffolding bar between two already assembled scaffolding elements arranged parallel to one another. The guide surface acts like an insertion bevel which facilitates the insertion of the scaffolding elements into the gripping space.In order to enable the scaffolding bar to be mounted between two scaffolding elements, the support surface is designed such that it surrounds the gripping space in the circumferential direction at an angle of no more than 100°, preferably at an angle of less than 90°. In this way, there is only a very small undercut in the support surface in a direction perpendicular to the longitudinal axis. This allows the two support surfaces of the opposing locks to be inserted between the two scaffolding elements oriented parallel to one another. In this case, it is possible for the scaffolding rule, in particular the bar support and / or the outriggers, to be slightly elastically deformed. In order to ensure a stable form-fit connection between the lock and the scaffolding element in the holding position, in this embodiment the gripping surface is preferably designed such that it surrounds the gripping space in the circumferential direction around the gripper axis at an angle of more than 100°.

[0027] Furthermore, it is provided that the clamping element comprises an insertion element which is arranged rotatably about an axis of rotation parallel to the gripper axis on the side of the gripping element opposite the support element and gripping element mounting, wherein the insertion element has an insertion recess which penetrates the insertion element in a direction parallel to the gripper axis and the clamping element comprises a wedge element with at least two flat surfaces arranged at an acute angle to one another, and in the holding position, the insertion element is guided through a groove in the support element, the wedge element is inserted into the insertion recess and a first side of the wedge element rests on the support element and a second side of the wedge element, opposite the first side, rests inside the insertion recess, wherein the clamping element can be actuated by linear movement of the wedge element in the direction of the gripper axis,to change the distance between the support surface and the gripping surface and thus the size of the gripping space. In this embodiment, the clamping element is designed in several parts and comprises an insert element with an insertion recess and a wedge element that is movably inserted into the insertion recess. The insert element is rotatably connected to the gripping element, and a groove oriented in the direction of the longitudinal axis is provided in the support element.through which the insert element can be guided. In the holding position, the insert element is guided by this groove in the support element, and the wedge element rests on the one hand inside the insertion recess and on the other hand against a surface of the support element facing the boom. When the wedge element moves in a direction perpendicular to the longitudinal axis, this movement is translated by the wedge shape into a movement of the insert element parallel to the longitudinal axis. As a result, the gripping element is rotated relative to the support element, guided by the bearing, thereby changing the size of the gripping space. Alternatively, the insert element can also be rotatably connected to the support element and guided by a groove in the gripping element. In this alternative case, the wedge element then rests on the one hand inside the insertion recess and on the other hand against a surface of the gripping element facing away from the boom.

[0028] In a further embodiment, the outriggers are mounted so they can rotate relative to the bar support, the axes of rotation of this mounting being oriented perpendicular to the longitudinal axis and perpendicular to the gripper axis, whereby the angles between the outrigger axes and the longitudinal axis can be changed. In this embodiment, the outriggers are mounted so they can move relative to the bar support. In this way, the angle between the outrigger axes and the longitudinal axis can be changed. This movable mounting serves to simplify the assembly of the scaffold bar in a scaffold section. In particular in the case in which closures are used in which the support surface and the gripping surface are curved and have an undercut in a direction perpendicular to the longitudinal axis, the movable mounting of the outriggers enables ergonomic assembly of the scaffold bar.Before or during assembly, the two outriggers are first moved into a position where the outrigger axes are oriented, for example, perpendicular to the longitudinal axis. In this position, the connecting interfaces are then connected to two spaced-apart scaffolding elements. The two locks are then folded toward the scaffolding elements by rotating the outriggers around their movable bearings. The gripping space is then reduced by actuating the clamping element so that the locks are positively and / or force-fitted to the scaffolding elements.

[0029] Cleverly, each outrigger is connected to the transom support via a hinge. A hinge provides a simple solution for providing a rotatable mounting between the outrigger and the transom support.

[0030] Furthermore, it is provided that the gripping surface surrounds the gripping space in the holding position in the circumferential direction around the gripper axis at an angle of at least 90°, preferably at an angle of at least 180°, and the support surface surrounds the gripping space in the holding position in the circumferential direction around the gripper axis at an angle of at least 90°, wherein the clamping element comprises a bolt which is pivotably connected to the support element about an axis parallel to the gripper axis and which comprises an external thread at least at its end opposite this connection, and the clamping element further comprises a clamping nut, wherein in the holding position the bolt is guided through a groove in the gripping element and the clamping nut rests on the side of the gripping element opposite the support element and is screwed onto the external thread of the bolt, wherein the clamping element can be actuated by rotating the clamping nut around the bolt,to change the distance between the support surface and the gripping surface and thus the size of the gripping space. In designs in which the arms are mounted rotatably relative to the bolt carrier, even locks with a larger undercut in the support surface and gripping surface can be mounted without problems. For this reason, in this design, these surfaces are preferably designed so thatthat they each enclose the gripping area at least at an angle of 90° in the circumferential direction around the gripper axis. Preferably, these surfaces enclose the gripping area at an angle of greater than 130°. In this embodiment, the clamping element is also designed in several parts and comprises a bolt with an external thread and a clamping nut. In the holding position, the bolt is guided through a groove either in the gripping element or in the support element and is correspondingly rotatably connected to the other element. In this embodiment, a known scaffold coupling with two half-shells can be used as a closure, which is placed around a scaffold element and fixed in a force-fitting manner by the combination of the clamping nut and bolt. A rotation of the clamping nut around the longitudinal axis of the bolt causes the distance between the support surface and the gripping surface to be changed. This embodiment is particularly suitable for simply and cost-effectively adapting existing,to extend known horizontal bars by two further connection points in the form of closures and thus to create a scaffolding bar according to the invention from an existing component.

[0031] Furthermore, it is advantageously provided that the connecting interfaces protrude in the direction of the gripper axis and in the direction of the longitudinal axis beyond the bolt carrier, wherein a partial area of ​​each connecting interface extends from the bolt carrier in the direction of a lock and this partial area is arranged centered to a plane which is defined by the two cantilever axes. In this embodiment, the connecting interface is designed in the same way as in known horizontal bolts. Each connecting interface protrudes in the direction of the gripper axis, downwards in the installed position. This protruding area is intended for insertion into a recess or opening in a bolt carrier interface. Furthermore, such a connecting interface also protrudes in the direction of the longitudinal axis beyond the end face of the bolt carrier. The protruding areas are centered or arranged centrally to the bolt carrier.This embodiment of a connection interface can be combined with all previously described embodiments.

[0032] In an alternative embodiment, the connecting interfaces protrude beyond the locking beam in the direction of the gripper axis and are flush with the locking beam in the direction of the longitudinal axis or are set back from it. In this embodiment, the connecting interface is designed differently from known horizontal bars. Here too, the connecting interface protrudes in the direction of the gripper axis, facing downwards in the installed position. This partial area is intended to be connected to one or two openings in a locking beam interface. However, the connecting interface is flush with the end face of the locking beam in the direction of the longitudinal axis or is even set back from this end face. This embodiment of a connecting interface has a simpler structure and has a smaller number of components.By providing such a connection interface, the weight of the scaffolding waler can be reduced. Because the scaffolding waler, with its two locks, has a total of four connection points for connecting to scaffolding elements, even the simplified connection interface is sufficiently load-bearing to transfer high forces and moments between the scaffolding waler and the adjacent scaffolding elements.

[0033] Also disclosed is a scaffolding bar, in particular for horizontally oriented installation in a scaffolding section, comprising

[0034] - at least one bar support which is rod-shaped and extends in the direction of a longitudinal axis, wherein the bar support has two opposite ends in the direction of the longitudinal axis and at each of these two ends a connection interface is arranged which is intended for connection to a scaffolding element,

[0035] - at least two outriggers, each extending along a outrigger axis, wherein the outrigger axes are each oriented at an angle between 1° and 89° to the longitudinal axis, and wherein the outriggers each have two opposite ends in the direction of their outrigger axis, wherein one of these ends of each outrigger is connected to the transom support, - at least two plug-in elements, one of which is arranged at the end of a outrigger which is opposite the connection of this outrigger to the transom support, wherein the two connection interfaces of the at least one transom support and the two plug-in elements together provide at least four connection points for connecting the scaffold transom to other scaffold elements, and the connection interfaces differ in shape and size from the plug-in elements, wherein each plug-in element has a projection,which is provided for connection to a cavity arranged on a framework element, wherein the projection protrudes beyond the adjacent cantilever in a direction perpendicular to the longitudinal axis, in a plane defined by the two cantilever axes, in particular wherein a support surface is arranged adjacent to the projection, which is oriented perpendicular to a plane defined by the two cantilever axes and parallel to the longitudinal axis, wherein the support surface is set back from the projection in a direction perpendicular to the longitudinal axis, in a plane defined by the two cantilever axes.

[0036] This type of scaffolding bar also includes four connection points that can be used to connect scaffolding elements. The four connection points are spaced apart from each other so that larger moments can be transmitted. However, unlike the scaffolding bar described above, this type of scaffolding bar does not include any locks that form connection points. Instead, the scaffolding bar has two plug-in elements that serve as connection points for connecting scaffolding elements. Each plug-in element has a projection that is designed to be inserted into a cavity arranged on a scaffolding element. The plug-in element is inserted into such a cavity in a simple, linear movement. Adjacent to the projection is a support surface that rests as a stop on a portion of the scaffolding element once the connection between the projection and the cavity has been made.For this type of scaffolding ledge, components must be provided on the scaffolding element that allow for the arrangement of a cavity to accommodate the projection. The advantage of this type of scaffolding ledge is its particularly simple design and can be ergonomically connected to a scaffolding element.The object of the invention is further achieved by a scaffolding section comprising at least one scaffolding cross member according to one of the previously described embodiments, further comprising at least one scaffolding element with a post which comprises at least one cross member support interface which is fastened to the post, wherein the connection interface of the scaffolding cross member is positively connected to the cross member support interface of the scaffolding element and the closure of the scaffolding cross member in the holding position is positively and / or non-positively connected to an outer circumferential surface of the post of the scaffolding element, wherein these two connection points are arranged at a distance from one another, in particular at a distance from one another in the longitudinal direction of the post.

[0037] The scaffolding section according to the invention comprises, in addition to a scaffolding ledger according to the invention, at least one scaffolding element. The scaffolding element is preferably designed as a vertical post. The scaffolding element comprises a post which is preferably oriented vertically in the installed position and on which at least one ledger support interface is provided. The ledger support interface is an interface which is provided for a positive connection to a horizontal ledger. The ledger support interface can, for example, be designed as a connecting disc which has a plurality of openings or recesses. Furthermore, it is possible for the scaffolding element to have a plurality of ledger support interfaces in the longitudinal direction. The scaffolding section according to the invention can also have a plurality of scaffolding elements. In the scaffolding section, at least one connecting interface is connected to a ledger support interface.In addition, at least one lock of the scaffolding ledger is connected to the post of the scaffolding element, wherein the lock in the holding position partially encompasses the post and is clamped on its outer surface. It is advantageous that no special interfaces have to be provided on the post for the connection of the lock to the post. The lock of the scaffolding ledger is designed so that it can be attached to a smooth outer surface of the post at any desired location. In this way, existing scaffolding elements, such as vertical posts, can be used to form a scaffolding section according to the invention. The distance between the connection of the scaffolding ledger via the connection interface and the connection via the lock increases the load-bearing capacity of this connection compared to a known horizontal ledger.The scaffolding section according to the invention thus has an increased load-bearing capacity, whereby the number of parts in the scaffolding section remains the same compared to a scaffolding section with a known horizontal bar.

[0038] In one embodiment of the scaffold section, the stem penetrates the gripping space in the direction of the gripper axis, and the clamping element clamps the stem between the support surface of the support element and the gripping surface of the gripping element. In the scaffold section, the longitudinal axis of the stem or scaffold element is oriented parallel or coaxially to the gripper axis. The stem is thus enclosed by the gripping space and clamped between the support element and the gripping element. The clamping force required for this clamping is generated and maintained by the clamping element.

[0039] In a further embodiment, it is provided that in the holding position the gripping surface and the support surface rest flatly on the outer surface of the handle, at least in some areas. To enable such flat contact, the gripping surface and support surface are preferably shaped negatively to the surface of the handle. Typically, the handle has a cylindrical cross-section. In this case, the gripping surface and support surface are preferably curved with the same radius. In this way, in the connected state, in the holding position, the handle is gripped by the closure over a large part of its circumference, with the closure resting flatly on the handle. In this way, a stable connection for transmitting large forces and moments is achieved.

[0040] The object of the invention is finally achieved by a method for constructing a scaffold section according to one of the previously described embodiments, comprising the steps

[0041] A) Transferring at least one lock of the scaffolding bar into the assembly position, whereby the gripping element is moved far enough away from the support element that the stem of the scaffolding element can be inserted into the gripping space between the gripping surface and the support surface,

[0042] B) Connecting a connecting interface of the beam support with a beam support interface of the scaffolding element and inserting the post into the gripping space between the gripping surface and the support surface,

[0043] C) Transferring the lock of the scaffolding bar into the holding position, whereby the tensioning element is actuated and thereby the gripping element with the gripping surface is moved towards the support element with the support surface until the post is connected to the lock in a force-locking and / or form-locking manner.

[0044] The method according to the invention serves to construct a scaffold section according to the invention. The method is preferably carried out in the order of process steps A) to C). To dismantle a scaffold section according to the invention, the method according to the invention can be carried out in the reverse order of the process steps, beginning with process step C) and ending with the last process step A) during dismantling.

[0045] In a first method step A), at least one lock of the scaffolding bar is moved into the assembly position, increasing the gripping space. During this transfer, the gripping element is moved away from the support element, allowing the post of the scaffolding element to be inserted into an opening between the gripping surface and the support surface.

[0046] In a second process step B), the connection between the connecting interfaces on the transom support and a transom support interface on the scaffolding element is first established. For this purpose, a portion of the connecting interfaces is inserted into an opening in the transom support interface. Subsequently, or simultaneously, the post of the scaffolding element is inserted into the gripping space. At the end of process step B), both the connecting interface and the transom support interface, as well as the lock and the post, are connected to each other with some remaining play.

[0047] In a third method step C), the closure is now transferred to the holding position, whereby the gripping element is moved towards the support element by actuating the tensioning element. During this movement, the gripping surface and the support surface strike the outer surface of the post. Upon further actuation of the tensioning element, the scaffolding element is clamped in the gripping space. In the holding position, the closure is then positively and non-positively connected to the post of the scaffolding element. Depending on the design of the connection interface, this can be further fixed in method step C), for example by applying hammer blows to a partial area of ​​the connection interface in order to also provide a non-positive connection between the connection interfaces and the bolt carrier interface. The method according to the invention can be carried out in a simple manner and leads to a load-bearing scaffolding section.The number of components in this scaffolding section is the same as in a known scaffolding section in which a known horizontal bar is connected to a scaffolding element.

[0048] Features, effects, and advantages disclosed in connection with the scaffolding beam and the scaffolding section are also deemed to be disclosed in connection with the method. The same applies in reverse: features, effects, and advantages disclosed in connection with the method are also deemed to be disclosed in connection with the scaffolding beam and the scaffolding section.

[0049] The figures schematically illustrate embodiments of the invention.

[0050] Fig. 1 is a perspective view of a scaffold section in a first embodiment according to the invention,

[0051] Fig. 2 is a front view of a scaffolding bar in a first embodiment according to the invention,

[0052] Fig. 3 is a perspective view of a scaffold section with a scaffold bar according to the first embodiment of the invention,

[0053] Fig. 4 is a partially sectioned view of a portion of the scaffolding section of Fig. 3,

[0054] Fig. 5 is a perspective view of a scaffold section with a scaffold bar according to a second embodiment of the invention,

[0055] Fig. 6 is a partially sectioned view of a portion of the scaffolding section of Fig. 5,

[0056] Fig. 7 is a perspective view of a scaffold section with a scaffolding bar according to a third embodiment of the invention, Fig. 8 is a perspective detailed view of a partial area of ​​the scaffolding bar from Fig. 7,

[0057] Fig. 9 is a perspective view of a scaffold section with a scaffold bar according to a fourth embodiment of the invention,

[0058] Fig. 10 is a perspective detailed view of a portion of the scaffolding beam from Fig. 9,

[0059] Fig. 11 is a perspective view of a scaffold section with a scaffold bar according to a fifth embodiment of the invention,

[0060] Fig. 12 is a perspective detailed view of a portion of the scaffolding beam from Fig. 11,

[0061] Fig. 13 is a perspective view of a scaffold section with a scaffold bar according to a sixth embodiment of the invention,

[0062] Fig. 14 a perspective view of a scaffolding bar with an alternative connection technique,

[0063] Fig. 15 a perspective view of a framework element with an additional cavity,

[0064] Fig. 16 is a perspective view of a scaffold section with the scaffold bar from Fig. 14 and the scaffold element from Fig. 15.

[0065] In the figures, identical elements are provided with identical reference symbols. In general, the properties of an element described for one figure also apply to the other figures. Directional references such as up or down refer to the described figure and are to be applied analogously to other figures.

[0066] Fig. 1 shows a perspective view of a scaffolding section 100 in a first embodiment according to the invention. The scaffolding section 100 shown comprises a scaffolding bar 1, which here is installed with its longitudinal axis LA aligned horizontally. The scaffolding bar 1 is shown in detail in Fig. 2 and described accordingly. The scaffolding bar 1 is connected at one end to a scaffolding element 20, which here is formed by a vertical post. At each of its ends, the scaffolding bar 1 has two connection points with a scaffolding element 20. Further up on the scaffolding element 20, a bar support interface 202 is arranged, which here is formed by a connecting disc. The scaffolding bar 1 is positively connected at each of its ends by one of its connection interfaces 21 to a bar support interface 202 of the scaffolding element 20.Below the crossbeam interface 202, the scaffolding crossbeam 1 is positively and non-positively fastened to the outer peripheral surface of a scaffolding element 20 by means of a fastener 41, 42. The scaffolding element 20 is formed between the crossbeam interfaces 202 by a cylindrical post 201. In the illustrated embodiment, this post 201 has a cylindrically shaped outer surface. The fasteners 41, 42 engage around this smooth, cylindrical surface of the scaffolding elements 20 and clamp them in the gripping space GR. No special interfaces for connecting to the fasteners 41, 42 are provided on the scaffolding elements 20. Rather, the fasteners 41, 42 can be fastened at any location on the rod-shaped areas of the scaffolding elements 20 between the crossbeam interfaces 202. There are two connection points between the scaffolding crossbeam 1 and a scaffolding element 20.Through this connection via two connection points between the scaffolding beam 1 and a scaffolding element 20, significantly higher forces and moments can be transmitted between the scaffolding beam 1 and the scaffolding element 20. The scaffolding section 100 shown is thus significantly more load-bearing and can absorb higher bending loads than a scaffolding section in which a known horizontal beam is installed instead of the scaffolding beam 1, which is connected to a scaffolding element 20 with only one connection point.

[0067] Fig. 2 shows a front view of a scaffolding ledger 1 in a first embodiment according to the invention. Fig. 2 shows the scaffolding ledger 1 from Fig. 1. The scaffolding ledger 1 comprises a ledger support 2 which is oriented from left to right in the illustration. This ledger support 2 is rod-shaped and is formed here by a tube with a rectangular cross-section. The ledger support 2 extends along a longitudinal axis LA. A connecting interface 21 is arranged at each of the two opposite ends of the ledger support 2. Each of these connecting interfaces 21 comprises two elements which are movable relative to one another. The connecting interface 21 is provided for a positive connection to a scaffolding element 20, for example a vertical post. However, the connecting interfaces 21 can also be rigid, as in the embodiments shown in Figs. 9 and 10, for example.The scaffolding ledger 1 additionally comprises two further connection points, which are formed by the two locks 41 and 42. The ledger support 2 is firmly connected to a first lock 41 via a first bracket 31. Furthermore, the ledger support 2 is firmly connected to a second lock 42 via a second bracket 32. The first bracket 31 extends along a first bracket axis AA1, and the second bracket 32 ​​extends along a second bracket axis AA2. In the embodiment shown, the brackets 31 and 32 are made of solid, plate-shaped elements made of an iron-based material. Alternatively, the two brackets 31 and 32 can also be formed by tubes. The brackets 31 and 32 are dimensioned such that sufficient force and moment transmission from the locks 41 and 42 to the ledger support 2 is possible.The two boom axes AA1 and AA2 are each oriented at an equal angle W to the longitudinal axis LA. In the embodiment shown, the angle W is approximately 60°. However, the angle W can also take on other values ​​lying between 1° and 89°. The smaller the angle W is selected, the longer the booms 31 and 32 must be. In the embodiment shown in Fig. 2, the two booms 31, 32 are each rigidly connected to the bolt carrier 2, whereby the angle W is always constant. Alternatively, it is also possible for the booms 31, 32 to be movably connected to the bolt carrier 2. Such an embodiment is shown in Figs. 11 and 12. Each boom 31, 32 has two opposite ends. One of these ends is connected to the bolt carrier 2, for example via a welded connection or a joint.It is also possible to design this connection differently, for example as a plug-in connection or screw connection. A closure 41, 42 is fastened to the second end of each boom 31, 32. The closure 41, 42 serves as an interface or connection point for connecting the scaffolding ledger 1 to a scaffolding element 20. Each closure 41, 42 comprises a support element 5 which is firmly connected to the boom 31, 32. Each support element 5 has a support surface 51 which is oriented perpendicular to the longitudinal axis LA and, in the illustration, points outwards. Arranged below the support element 5 is a gripping element 6 which also belongs to the closure 41, 42 and is movably mounted on the support element 5. The gripping element 6 projects outwards beyond the support element 5 in the direction of the longitudinal axis.A gripping surface 61 is arranged on each gripping element 6, which is oriented perpendicular to the longitudinal axis LA and, in the illustration, points inwards towards the center of the bolt carrier 2. A gripping space GR is defined between the support surface 51 and the gripping surface 61 of each lock 41, 42. Gripping space GR is understood to be the space which is delimited in the direction of the longitudinal axis LA by a support surface 51 and a gripping surface 61. Each gripping space GR extends along a gripper axis GA, which is oriented perpendicular to the longitudinal axis LA and lies in a plane defined by the two cantilever axes AA1, AA2. When connecting a lock 41, 42 to a framework element 20, the gripper axis GA is oriented at least parallel, preferably coaxially, to the longitudinal axis or central axis of the framework element 20.Each closure 41, 42 further comprises a tensioning element 7, which is movably connected to the support element 5 and the gripping element 6. When the tensioning element 7 is actuated, the gripping element 6 moves relative to the support element 5, which also changes the size of the gripping space GR. The support element 5, the gripping element 6 and the tensioning element 7 can be designed differently. Details of the embodiment of these elements shown in Fig. 2 are shown and described in Figs. 3 and 4. Details of the structure and function of further embodiments of the closure 41, 42 are shown and described in Figs. 5 to 12. In the direction of the longitudinal axis LA, there is a distance between each gripping surface 61 and the end face of the connecting interfaces 21 arranged adjacent to it in the direction of the longitudinal axis LA.The gripping element 6 thus protrudes beyond the adjacent connection interface 21 on each side of the scaffolding beam 1 in the direction of the longitudinal axis LA. This enables the connection interface 21, when connected to a scaffolding element 20, to be applied to this scaffolding element 20 on one side, and the gripping surface 61 to encompass this scaffolding element 20 on the opposite side. Fig. 2 further shows that, in the direction of the longitudinal axis LA, the distance between the gripping surfaces 61 of the opposing locks 41, 42 is greater than the total length of the beam support 2, including its two connection interfaces 21. In the illustrated embodiment, this total length of the beam support 2, including its two connection interfaces 21, corresponds to the distance between the two support surfaces 51.When connecting the scaffolding bar 1 to a scaffolding element 20, the end face of a connection interface 21 is placed in the same circumferential direction on the scaffolding element 20 as the support surface 51. In all embodiments, the gripping surface 61 and / or the support surface 51 is curved at least in some regions, with the axis of curvature oriented perpendicular to the longitudinal axis LA and parallel to the gripper axis GA. The radius of curvature of this curvature is preferably similar or identical to the radius of the cross-section of the scaffolding element 20. In this way, a large-area contact is achieved between the closure 41, 42 and the scaffolding element 20. In the state shown in Fig. 2, the closure 41, 42 is in the assembled position, in which the distance between the support surface 51 and the gripping surface 61 is greater than the diameter of the scaffolding element 20.In the assembly position, the scaffolding element 20 can thus be inserted into the gripping space GR between the support surface 51 and the gripping surface 61. Starting from the assembly position shown, the tensioning element 7 is then actuated, reducing the distance between the support surface 51 and the gripping surface 61. This also reduces the size of the gripping space GR. A holding position of the lock 41, 42 is reached when the distance between the support surface 51 and the gripping surface 61 corresponds to the diameter of the scaffolding element 20. In the connected state, in the holding position, the scaffolding element 20 is clamped in the gripping space GR by the lock 41, 42. In the embodiment shown in Fig. 2, the two outriggers 31, 32 are located on the same side of the bolt carrier 2 and, as shown, both point downwards. Alternatively, the outriggers 31, 32 can also be arranged on opposite sides of the bolt carrier 2.Such an embodiment is shown in Fig. 13.

[0068] Fig. 3 shows a perspective view of a scaffolding section 100 with a scaffolding ledger 1 according to the first embodiment of the invention from Fig. 2. Fig. 3 shows a scaffolding ledger 1 according to the first embodiment, which is connected to a scaffolding element 20 designed as a vertical post to form a scaffolding section 100. The visible connection interface 21 here comprises several parts, at least one part of which is designed to be movable relative to the rest of the scaffolding ledger 1. This connection interface 21 is inserted into a recess in the ledger support interface 202. The ledger support interface 202 is designed as a connecting disk, which can also be used to connect known horizontal ledgers to the scaffolding element 20. The connection interface 21 is connected to the ledger support interface 202 in a form-fitting and force-fitting manner.A second connection point is formed by the connection between the illustrated closure 42 and the scaffolding element 20. The closure 42 encompasses an outer surface of the scaffolding element 20. A special interface for connecting to the closure 42 is not provided on the scaffolding element 20. The closure 42 encompasses the support element 5, which is firmly connected to the boom 32 and is designed as a plate here. This plate is aligned at right angles to the boom 32. The support surface 51 points to the rear right in the illustration and is curved. The radius of curvature of the support surface 51 corresponds to the radius of the vertical post which forms the scaffolding element 20. Below the support element 5, the gripping element 6 can be seen, which is movably mounted relative to the support element 5 and which encompasses a portion of the scaffolding element 20. The gripping surface 61 is also curved and points to the front left in the illustration.The closure 42 has a bearing which supports the gripping element 6 so as to be linearly movable relative to the support element 5, the direction of this linear mobility being oriented parallel to the longitudinal axis LA. In the first embodiment shown, the clamping element 7 is wedge-shaped in some areas. The clamping element 7 is actuated by a movement perpendicular to the longitudinal axis LA. When the clamping element 7 is pushed into the closure 41 from the rear left to the front right, the gripping element 6 is moved linearly relative to the support element 5. The gripping surface 61 moves towards the support surface 51. The interaction of the clamping element 7, support element 5 and gripping element 6 is shown in detail in Fig. 4. In the first embodiment shown in Fig. 3, the orientation of the gripping surface 61 to the support surface 51 is the same in the holding position and in the assembly position.The clamping element 7 has a projection on the rearward-facing side that protrudes in the direction of the longitudinal axis LA. On the forward-right side, a pin is inserted into the clamping element 7, which is oriented perpendicular to the longitudinal axis and protrudes beyond the clamping element 7 on both sides in this direction. These two protruding areas ensure that the clamping element 7 is movably yet positively connected to the remaining area of ​​the lock 42. In this way, the clamping element 7 cannot be lost when the scaffolding bar 1 is used.

[0069] Fig. 4 shows a partially sectioned view of a portion of the scaffold section 100 from Fig. 3. Fig. 4 shows a portion of Fig. 3 viewed from below in the direction of the longitudinal axis of the scaffold element 20. The movable gripping element 6 is hook-shaped. The gripping surface 61 is arranged inside the hook-shaped area pointing to the right and encloses the scaffold element 20 at an angle of greater than 90° in the circumferential direction around the gripper axis GA. The support element 5 arranged above it and partially concealed by the gripping element 6 encloses the scaffold element 20 and thus the gripping space GR at an angle of greater than 45° in the circumferential direction around the gripper axis GA.Due to the opposite arrangement of the gripping surface 61 and the support surface 51 in the direction of the longitudinal axis LA, the closure 42, in the holding position shown, encloses the gripping space GR and thus the scaffolding element 20 inserted therein by more than 180° in the circumferential direction around the gripper axis GA. In the holding position shown, the closure 42 is thus connected to the scaffolding element 20 both force-fitting and form-fitting, which ensures a particularly stable, play-free connection. The bearing, which supports the gripping element 6 so that it can move linearly relative to the support element 5, is formed by a partial area of ​​the support element 5. This partial area is shown in section in Fig. 4 and comprises two guides, between which the left-facing partial area of ​​the gripping element 6 is inserted with a clearance fit. The gripping element 6 is thus slidably mounted in a partial area of ​​the support element 5.In the partial area of ​​the support element 5 forming the bearing, a penetration with a rectangular cross-section is introduced, which penetrates this partial area in a direction perpendicular to the longitudinal axis LA and the gripper axis GA. In the partial area of ​​the gripping element 6 which is introduced into the bearing and points to the left in the drawing, a recess is introduced, which also extends in a direction perpendicular to the longitudinal axis LA and perpendicular to the gripper axis GA. As can be seen in the illustration, the right-hand boundary of this recess is oriented at a right angle to the longitudinal axis LA. The left-hand boundary of this recess, however, is oriented at an acute angle to the right-hand boundary. The clamping element 7 is introduced into this recess and simultaneously into the penetration in the bearing. The clamping element 7 has a first side contour 71 which is linear and oriented perpendicular to the longitudinal axis LA.On the opposite side, the clamping element 7 is delimited by a second side contour 72, which is also linear but oriented at an acute angle to the first side contour 71. The first side contour 71 and the second side contour 72 together form a wedge-shaped region. The first side contour 71 rests on the right-hand boundary of the penetration in the bearing, which forms a partial region of the support element 5. The second side contour 72 rests on a partial region of the gripping element 6, which is formed by the inclined, left-hand boundary of the recess in the gripping element 6. Due to the interaction of the inclined partial regions of the clamping element 7 and the gripping element 6, when the clamping element 7 is inserted, from bottom to top in the illustration, the gripping element 6 is moved to the left.This reduces the distance between the gripping surface 61 and the support surface 51, and the scaffold element 20 is clamped in the closure 42. In this first embodiment of a scaffold rule 1, the clamping element is removed in a simple manner, for example by applying hammer blows to the portion of the clamping element 7 facing downwards in Fig. 4. If the closure 42 is to be moved from the holding position back to the assembly position, the clamping element 7 is moved in the opposite direction, from top to bottom in the illustration.

[0070] Fig. 5 shows a perspective view of a scaffold section 100 with a scaffolding bar 1 according to a second embodiment of the invention. In Fig. 5, only the lower portion of the boom 31 and a closure 41 in connection with a scaffolding element 20 designed as a vertical post are shown. For the remaining portion of the scaffolding bar 1, reference is made to Fig. 2 and the associated description. The second embodiment shown in Fig. 5 is very similar to the first embodiment shown in Figs. 3 and 4. The closure 41 has a support element 5 designed as a plate, which is firmly connected to the boom 31. The movable gripping element 6 is hook-shaped in some areas and engages around the scaffolding element 20. The clamping element 7 in the second embodiment is formed by a cam nut which is screwed onto an external thread arranged on the gripping element 6.The clamping element 7, designed as a cam nut, rests on the support element 5 on the side facing away from the support surface 51 in the direction of the longitudinal axis LA. To move the gripping element 6, the support element 7 is rotated about an axis of rotation parallel to the longitudinal axis LA. The interaction between the external thread arranged on the gripping element 6 and the internal thread in the clamping element 7 changes the distance between the support surface 51 and the gripping surface 61. The clamping element 7, designed as a cam nut, can either be turned by hand or, to clamp the scaffolding element 20 between the support element 5 and the gripping element 6, actuated by applying hammer blows to the cams of the cam nut.

[0071] Fig. 6 shows a partially sectioned view of a portion of the scaffold section 100 from Fig. 5. In this view, the scaffold section 100 is shown from below, viewed from the longitudinal direction of the scaffold element 20. A curved support surface 51 rests on the right-hand side in the illustration against an outer circumferential surface of the scaffold element 20. Below the support element 5, the gripping element 6 is shown in section, the left-hand side of which is hook-shaped in the illustration and engages around the scaffold element 20 with a curved gripping surface 61. In the holding position shown, the gripping surface 61 and the support surface 51 enclose the gripping space GR and thus the scaffold element 20 by more than 180° in the circumferential direction around the gripper axis GA. The region of the gripping element 6 pointing to the right in the illustration comprises a rectangular region which adjoins the hook-shaped region.On the right-hand side of this rectangular area, an external thread extends in a direction parallel to the longitudinal axis LA. Similar to the first embodiment in Fig. 4, the bearing of the gripping element 6 is formed by a partial area of ​​the support element 5. This partial area of ​​the support element 5 is shown in section and has a rectangular cross-section. The rectangular area of ​​the gripping element 6 is inserted with a clearance fit into the bearing formed by the support element 5 and can thus be moved in a direction parallel to the longitudinal axis LA. The clamping element 7 is designed as a cam nut and has an internal thread on its interior, which is screwed to the right-facing external thread on the gripping element 6.The surface oriented perpendicular to the direction of extension of the internal thread in the clamping element 7 rests against a surface of the support element 5 oriented perpendicular to the longitudinal axis LA, which surface is arranged on the opposite side of the support element 5 to the support surface 51. Upon rotation of the clamping element 7, its left-facing surface rests against the right-facing surface of the support element 5. As a result, upon rotation of the clamping element 7, the gripping element is pulled to the right in the illustration, whereby the scaffolding element 20 is clamped in a form-fitting and force-fitting manner between the gripping surface 61 and the support surface 51 in the closure 41.

[0072] Fig. 7 shows a perspective view of a scaffold section 100 with a scaffolding cross member 1 according to a third embodiment of the invention. In the third embodiment shown, the connection interface 21 is identical to the first and second embodiments. However, the functional principle of the closure 41 differs from the first and second embodiments. In the third embodiment, the closure 41 has a bearing which supports the gripping element 6 so as to be rotatable about an axis of rotation parallel to the gripper axis GA relative to the support element 5. Due to this axis of rotation, which is oriented vertically in the illustration, the orientation of the gripping surface 61 relative to the support surface 51 differs between the holding position shown and the assembly position, in which a scaffold element 20, such as the vertical post shown, can be introduced into the gripping space GR of the closure 41.In the third embodiment, the boom 31 is rigidly connected to the locking beam 2. When attaching the scaffolding rail 1 to the scaffolding element 20, the end of the connection interface 21 pointing downwards in the illustration is first inserted into a recess in the locking beam interface 202 and moved downwards. In order to be able to insert the scaffolding element 20 into the gripping space GR, the gripping element 6 is moved backwards into the assembly position from the state shown. Subsequently, the support element 5, which is rigidly connected to the boom 31, is guided past the scaffolding element 20 in order to insert the scaffolding element 20 into the gripping space GR. In order to enable this insertion or pivoting of the lock 41 around the scaffolding element 20, it is important that the support element 5 has no or only a very slight undercut.This is necessary because the position of the scaffolding guide 1 relative to the scaffolding element 20 is already determined by the connecting interface 21 introduced into the locking carrier interface 202. To facilitate the pivoting in of the lock 41, a guide surface 52 is provided, which can be seen in detail in Fig. 8. After the lock 41 has been pivoted in, the gripping element 6 is then rotated about the vertically oriented axis of rotation and transferred into the holding position shown in Fig. 7. In the third embodiment, the clamping element 7 comprises several parts, which are shown in detail in Fig. 8 and described accordingly.

[0073] Fig. 8 shows a perspective detailed view of a portion of the scaffolding bar 1 from Fig. 7. In Fig. 8, the closure 41 from Fig. 7 can be seen, although the scaffolding element 20 is not shown. The support element 5 is rigidly connected to the boom 31 and comprises a curved support surface 51. A flat guide surface 52 is arranged adjacent to this support surface 51. This guide surface 52 guides the closure 41 when the scaffolding bar 1 is pivoted in around a scaffolding element 20. The guide surface 52 is inclined at an acute angle to a plane which is oriented perpendicular to the longitudinal axis LA. The guide surface 52 is inclined, starting from the adjacent support surface 51, away from the gripping element 6 in the direction of the boom 31. The curved support surface 51 is slightly set back in the direction of the longitudinal axis compared to the line in which the guide surface 52 and the support surface 51 adjoin one another.This creates a slight undercut in a plane perpendicular to the longitudinal axis. When the scaffolding ledger 1 is pivoted in around a scaffolding element 20, this undercut can be created on the scaffolding element 20 due to tolerances and slight elastic deformation of the scaffolding ledger 1. If this undercut were larger in the direction of the longitudinal axis LA, a collision could occur when the scaffolding ledger 1 is pivoted in, since the position of the scaffolding ledger 1 relative to the scaffolding element 20 is already predetermined by the connection between the connection interface 21 and the ledger support interface 202. The position of the scaffolding element 20 is usually also not changeable in a scaffold section 100 that has already been partially assembled. After pivoting in, during which the scaffolding element slides along the guide surface 52, the longitudinal axis of the scaffolding element 20 is oriented congruently with the gripper axis GA.In this state, the support surface 51 then encloses the gripping space GR and thus the framework element 20 in the circumferential direction around the gripper axis GA at an angle of at most 90°. In the third embodiment, the gripping element 6 is connected to the support element 5 via a hinge, wherein the axis of rotation of this hinge is oriented parallel to the gripper axis GA. The gripping element 6 has a likewise curved gripping surface 61 which encloses the gripping space GR and thus the framework element 20 enclosed therein in the circumferential direction around the gripper axis GA at an angle of greater than 180°. In the holding position of the closure 41 shown in Fig. 8, it can be clearly seen that the support surface 51 and the gripping surface 61 almost completely surround the gripping space in the circumferential direction around the gripper axis GA, at least at an angle of 270°.In this way, the closure 41 enables an effective positive connection of the scaffolding bar 1 to the scaffolding element 20. The largest part of this positive connection is provided by the movable gripping element 6. Alternatively, the curved support surface 51 can also be flush with the guide surface 52 in the direction of the longitudinal axis LA, so that there is no undercut of the support surface 51 relative to the guide surface 52 in the direction of the longitudinal axis LA. In the third embodiment, the clamping element 7 comprises an insertion element 73 which is arranged rotatably about an axis of rotation parallel to the gripper axis GA on the side of the gripping element 6 opposite the bearing or the hinge. This insertion element 73 has an insertion recess 731 which penetrates the insertion element 73 in the direction of the gripper axis GA.In the holding position shown, the insertion element 73 is guided through a groove that penetrates the support element 5 in the direction of the longitudinal axis LA. By rotating about its axis of rotation, the insertion element 73 can, however, be pivoted out of this groove when transferred into the assembly position in order to enable a rotational movement of the gripping element 6 away from the support element 5. The clamping element 7 further comprises a wedge element 74, which is inserted into the insertion recess 731. The wedge element 74 comprises two flat surfaces arranged at an acute angle to one another, which are oriented to the left and right in the illustration. A first side of the wedge element 74 rests on the right-facing surface of the support element 5. A second side of the wedge element 74, opposite the first side, rests on a likewise inclined surface inside the insertion recess 731.The inclination of this surface corresponds to the angle of the first side to the second side of the wedge element 74. If the wedge element 74 is moved downward in a direction relative to the longitudinal axis LA, this movement is translated into a movement of the insertion element 73 to the right, whereby the gripping element 6 is pulled toward the support element 5. This reduces the distance between the gripping surface 61 and the support surface 51, and a scaffold element 20 inserted into the gripping space GR is clamped in the closure 41.

[0074] In the first, second, and third embodiments of the scaffolding beam 1, the connecting interfaces 21 are always identical. These connecting interfaces 21 protrude beyond the beam support 2 in the direction of the gripper axis GA and in the direction of the longitudinal axis LA. A partial area of ​​each connecting interface 21 extends from the beam support 2 in the direction of the adjacent or underlying lock 41, 42. This partial area is centered relative to the beam support and arranged relative to a plane defined by the two cantilever axes AA1, AA2. Each connecting interface 21 has a part rigidly connected to the beam support 2 and a part movable relative to this rigid part. The connecting interfaces 21 shown are known from conventional horizontal beams and are intended for connection to a recess in a beam support interface 202.

[0075] Fig. 9 shows a perspective view of a scaffold section 100 with a scaffolding bar 1 according to a fourth embodiment of the invention. The fourth embodiment shown in Figs. 9 and 10 differs from the third embodiment shown in Figs. 7 and 8 only in the design of the connection interface 21. The closures 41 and 42 of the fourth embodiment are identical to the closures 41 and 42 of the third embodiment. Therefore, with regard to the closures 41 and 42, reference is made to the description of the third embodiment. The connection interfaces 21 of the fourth embodiment each have a smaller number of parts. Each connection interface 21 of the fourth embodiment projects in the direction of the gripper axis GA beyond the side of the bar support 2 facing the booms 31, 32. However, the connection interface 21 is flush with the bar support 2 in the direction of the longitudinal axis LA.In the fourth embodiment, the connecting interface 21 is designed symmetrically to the longitudinal axis LA, with a part of the connecting interface 21 being located side by side with the bolt carrier 2 in a direction perpendicular to the longitudinal axis LA and perpendicular to the gripper axis GA, and being attached thereto. A plate-shaped holder is provided on each side of the bolt carrier 2.

[0076] 211, which carries an insertion pin 212. The insertion pin 212 extends in a direction parallel to the gripper axis GA. In the illustrated embodiment, the insertion pin

[0077] 212 is designed as a cylindrical pin halved in the longitudinal direction. The downward-facing end of the insertion pin 212, which protrudes beyond the holder 211, is inserted into a recess in the transom support interface 202. The two insertion pins 212 of a connecting interface 21 together fix the scaffolding transom 1 in the transom support interface 202, thereby securing it against rotation about an axis of rotation parallel to the longitudinal axis of the scaffolding element 20. In the fourth embodiment, the two insertion pins 212 are inserted into different recesses in the transom support interface 202 than the connecting interfaces 21 of the other embodiments. The end face of the transom support 2 has a curved surface which is adapted to the curvature of the scaffolding element 2. In this way, the front side of the bar support 2 in the assembled state shown in Fig. 9 lies flat against the outer surface of the scaffolding element 20.The connection interface 21 used in the fourth embodiment is simpler in design and can be assembled more quickly than the connection interfaces 21 of the other embodiments. Therefore, the connection interfaces 21 in the first, second, and third embodiments can additionally absorb torques about bending axes perpendicular to the longitudinal axis LA and perpendicular to the longitudinal axis of the scaffolding element 20. Bending moments acting in this direction, which act on the scaffolding bar 1 or the scaffolding element 20, can also be absorbed and transmitted in the fourth embodiment by the combination of the two connection points on one side of the scaffolding bar, namely the connection interface 21 in combination with the lock 41. Thus, the fourth embodiment also significantly improves the load-bearing capacity and load-bearing capacity of the scaffolding section 100 compared to the use of a known horizontal bar. Fig.10 shows a perspective detailed view of a partial area of ​​the scaffolding ledger 1 from Fig. 9. In Fig. 10, the scaffolding element 20 is not shown so that the connection interfaces 21 are more clearly visible. It can be clearly seen that the front side of the ledger support 2 has a curved surface which is adapted to the curvature of the scaffolding element 20. Furthermore, it can be clearly seen that a holder 211 and an insertion pin 212 held by the holder are arranged symmetrically to the longitudinal axis LA on both sides of the ledger support 2. The surfaces of the holders 211 and the insertion pins 212 pointing to the front left in the direction of the longitudinal axis LA are flush with the front surface of the ledger support 2. Alternatively, these surfaces of the holders 211 and the insertion pins 212 can also be set back from the front surface of the ledger support 2 in the direction of the longitudinal axis LA.To connect the connection interface 21 to a bolt carrier interface 202, the two insertion pins 212 are positioned congruent with openings in the bolt carrier interface 202, and then the entire scaffolding bolt 1 is moved vertically downwards so that the two insertion pins 212 penetrate the openings. The assembled end position is reached as soon as the downward-facing surface of the brackets 211 strikes the upward-facing surface of the bolt carrier interface 202. Before this connection of the connection interface 21 to the bolt carrier interface 202, the gripping element 6 of the lock 41 is transferred into the assembly position, in which it is folded away from the support element 5. The gripping element 6 shown in Fig.The embodiment of the connection interface 21 shown in Figures 9 and 10 can also be combined with the previously described first, second and third embodiments of the scaffolding bar 1 and the associated embodiments of the closures 41 and 42.

[0078] Fig. 11 shows a perspective view of a scaffold section 100 with a scaffolding cross member 1 according to a fifth embodiment of the invention. In contrast to the previously described first, second, third, and fourth embodiments of the scaffolding cross member 1, in the fifth embodiment shown, the boom 31, 32 is rotatably mounted relative to the cross member support 2. The axis of rotation of this mounting is oriented perpendicular to the longitudinal axis LA and perpendicular to the gripper axis GA. Due to the mounting, the angle W between the longitudinal axis LA and the boom axis AA1, AA is variable. The movable mounting of the boom 31, 32 ensures that the closure 41, 42 can be connected to the scaffolding element 20 after the connection between the connection interface 21 and the cross member support interface 202. In this way, collision problems between the scaffolding cross member 1 and the scaffolding element 20 are avoided when connecting these components.In the illustrated embodiment, the bearing between the bolt carrier 2 and the boom 31, 32 is formed by a hinge. In the fifth embodiment shown, the closure 41, 42 is formed by a known scaffold coupling, which is firmly connected to the end of the boom 31, 32 opposite the bolt carrier 2. The support element 5 and the gripping element 6 are each formed by a half-shell, wherein the gripping element 6 is rotatably mounted to the support element 5 about an axis of rotation that runs parallel to the gripper axis GA. The gripping surface 61 and the support surface 51 are curved and, in the holding position shown, encompass the scaffold element 20 in the circumferential direction around the gripper axis GA by more than 90° each. As a result, in the holding position shown, the scaffold element 20 is enclosed by the closure 41, 42 over a large portion of its circumference. This ensures a particularly good form fit between the components.The assembly of the lock 41, 42 is possible despite the strong undercuts in the curved areas of the support surface 51 and gripping surface 61 by pivoting the boom 31, 32 about the bearing to the locking beam 2 during assembly of the lock 41, 42. The clamping element 7 is described in connection with Fig. 12. In the holding position shown in Fig. 11, the connection interface 21 and the lock 41 are firmly connected to the scaffolding element 20. Despite the movable bearing of the boom 31, a transmission of forces and moments between the locking beam 1 and the scaffolding element 20 is possible in an improved manner via the two connection points. The fifth embodiment shown can be attached particularly easily to an existing scaffolding section 100, especially when space is limited, for example, due to several horizontal beams already connected to a scaffolding element 20.

[0079] Fig. 12 shows a perspective detailed view of a portion of the scaffolding bar 1 from Fig. 11. Fig. 12 shows the fifth embodiment of the scaffolding bar 1 without the scaffolding element 20. It can be clearly seen that both the support surface 51 and the gripping surface 61 have an undercut. The clamping element 7 is formed in this embodiment by a bolt 75 and a clamping nut 76. The bolt 75 is mounted on the support element 5 so as to be pivotable about an axis parallel to the gripper axis GA. The gripping element 6 has a groove which, in the holding position shown, extends through the gripping element 6 parallel to the longitudinal axis LA. To connect the closure 41, 42, the bolt 75 is inserted into the groove in the gripping element 6 and then the clamping nut 76 is screwed onto an external thread applied to the bolt 75 and tightened.The clamping nut 76 rests on a surface of the gripping element 6, which is opposite the support element 5 in the direction of the longitudinal axis LA. By tightening the clamping nut 76, the gripping surface 61 is moved toward the support surface 51. By actuating the clamping nut 76, the scaffolding element 20 is easily clamped between the support surface 51 and the gripping surface 61. The movable mounting of the boom 31, 32 of the fifth embodiment can also be combined with the closures 41, 42 of the first, second, third, and fourth embodiments.

[0080] Fig. 13 shows a perspective view of a scaffold section 100 with a scaffolding beam 1 according to a sixth embodiment of the invention. The sixth embodiment shown differs from the other embodiments in the orientation of the outriggers 31, 32 to the beam support 2. In the embodiment shown, the outriggers 31, 32 are located on opposite sides of the beam support 2, relative to a plane which runs through the longitudinal axis LA and is oriented perpendicular to the gripper axis GA. The two outrigger axes AA1 and AA2 are arranged in a common plane. The sixth embodiment shown also enables the scaffolding beam 1 to be connected to a scaffold section 100 via four connection points. The opposing arrangement of the outriggers 31, 32 prevents collisions with other components of the scaffold section 100.For example, another scaffolding element could be installed at the crossbeam interface 202 of the scaffolding element 20 shown on the right, below the already installed scaffolding crossbeam 2, without any collision with the outrigger 32 and the lock 42. The sixth embodiment shown can also be combined with the different locks 41, 42 of the first, second, third, fourth, and fifth embodiments. Furthermore, the sixth embodiment can also be combined with a movably mounted outrigger 31, 32 according to the fifth embodiment.

[0081] Fig. 14 shows a perspective view of a scaffolding bar 1 with an alternative connection technique. In Figs. 14, 15 and 16, a scaffolding bar 1 is shown which, like the previously described embodiments according to the invention, has a total of four connection points for connection to a scaffolding element 20, in particular a vertical post. In the alternative connection technique shown, the scaffolding bar 1 does not have a closure 41, 42. Instead, a plug-in element 91, 92 is arranged on each boom 31, 32 at its end opposite the bar support 2. This plug-in element 91, 92 is provided for connection to a cavity K arranged on a scaffolding element 20. Each plug-in element 91, 92 has a projection V which projects in a direction perpendicular to the longitudinal axis LA in the plane defined by the two boom axes AA1, AA2.In the illustrated embodiment, this projection V has a rectangular cross-section. Adjacent to each projection V is a support surface AL oriented parallel to the longitudinal axis LA. This support surface AL is oriented perpendicular to the plane defined by the two cantilever axes AA1 and AA2. The support surface AL is set back from the projection V and directly borders it.

[0082] Fig. 15 shows a perspective view of a scaffold element 20 with an additional cavity K. The illustration shows a scaffold element 20 designed as a vertical post, which has a bolt carrier interface 202 in the form of a connecting disk in its upper region. Below this bolt carrier interface 202, outside the outer surface of the post 201, there is a cavity K. This cavity K is arranged between the outer surface of the post 201 and an inner surface of a ring 203. In the embodiment shown, the ring 203 encloses the post 201 around its entire circumference. The ring 203 can be connected to the post 201, for example, by a welded connection. Between the ring 203 and the stem 201, the cavity K extends with a rectangular cross-section parallel to the longitudinal axis of the framework element 20. The shape and size of the cavity K are designed such that a projection V of the framework bar 1 of the type shown in Fig.14, can be inserted into the cavity K with a clearance fit. The ring 203 can be attached during the manufacture of the framework element 20 or can be retrofitted to an already existing framework element 20.

[0083] Fig. 16 shows a perspective view of a scaffold section 100 with the scaffolding cross member 1 from Fig. 14 and the scaffolding element 20 from Fig. 15. Fig. 16 shows the assembled state between the scaffolding cross member 1 from Fig. 14 and the scaffolding element 20 from Fig. 15. The projection V of the plug-in element 92 is inserted into the cavity K in a form-fitting manner. The connection interface 20 is connected to the cross member support interface 202. In the illustrated assembled state, the support surface AF rests on the upward-facing surface of the ring 203 of the adjacent cavity K. In the illustrated alternative embodiment, the connection point, which is formed by a projection V and a cavity K, can be easily connected and separated again. The alternative embodiment also enables an improved transmission of moments in a scaffold section 100 compared to a known horizontal cross member.

[0084] List of reference symbols:

[0085] 1 scaffolding bar

[0086] 2 bolt carriers

[0087] 21 Connection interface

[0088] 31, 32 boom

[0089] 41, 42 closure

[0090] 5 Support element

[0091] 51 support surface

[0092] 52 guide surface

[0093] 6 gripping element

[0094] 61 gripping surface

[0095] 7 clamping element

[0096] 71 first side contour

[0097] 72 second side contour

[0098] 73 Insert element

[0099] 731 insertion recess

[0100] 74 wedge element

[0101] 75 bolts

[0102] 76 clamping nut

[0103] 91, 92 plug-in element

[0104] 100 scaffolding sections

[0105] 20 scaffolding elements

[0106] 201 handle

[0107] 202 bolt carrier interface

[0108] 203 Rings

[0109] 21 Connection interface

[0110] 211 Bracket

[0111] 212 insertion pin

[0112] AA1, AA2 boom axis

[0113] AF support surface LA longitudinal axis

[0114] GA gripper axis

[0115] GR gripping area

[0116] K Cavity V Protrusion

[0117] W angle

Claims

Scaffolding bar (1), in particular for horizontally oriented installation in a scaffolding section (100), comprising - at least one bar support (2) which is rod-shaped and extends in the direction of a longitudinal axis (LA), wherein the bar support (2) has two opposite ends in the direction of the longitudinal axis (LA) and at each of these two ends a connection interface (21) is arranged, which is intended for connection to a scaffolding element (20), - at least two arms (31, 32), each extending along a arm axis (AA1, AA2), wherein the arm axes (AA1, AA2) are each oriented at an angle (W) between 1° and 89° to the longitudinal axis (LA) and wherein the arms (31, 32) each have two opposite ends in the direction of their arm axis (AA1, AA2), one of these ends of each arm (31, 32) being connected to the locking beam (2), - at least two closures (41, 42), one of which is arranged at the end of a cantilever (31, 32) which is opposite the connection of this cantilever (31, 32) to the transom support (2), wherein the two connection interfaces (21) of the at least one transom support (2) and the two closures (41, 42) together provide at least four connection points for connecting the scaffolding transom (1) to further scaffolding elements (20), and the connection interfaces (21) differ in shape and size from the closures (41, 42), wherein each closure (41, 42) comprises a support element (5) connected to the cantilever (31, 32), which has a support surface (51) which is oriented at least partially perpendicular to the longitudinal axis (LA) and points away from the respective cantilever (31, 32) in the direction of the longitudinal axis (LA), and wherein each closure (41, 42) comprises a gripping element (6) which is movably mounted relative to the support element (5),which has a gripping surface (61) which is oriented at least in regions perpendicular to the longitudinal axis (LA) and points in the direction of the longitudinal axis (LA) towards the respective boom (31, 32), wherein between the support surface (51) and the gripping surface (61) in the direction of the longitudinal axis (LA) there is a distance which can be changed by a movement of the gripping element (6), which defines a gripping space (GR) which is provided for receiving a scaffolding element (20), and wherein each closure (41, 42) comprises at least one clamping element (7) which is movably connected to the support element (5) and the gripping element (6), wherein the distance between the support surface (51) and the gripping surface (61) and thus the size of the gripping space (GR) can be changed by actuating the clamping element (7).

2. Scaffolding bar (1) according to claim 1, characterized in that in the direction of the longitudinal axis (LA) the distance between the gripping surfaces (61) of the opposing locks (41, 42) is greater than the total length of the bar support (2) with its two connecting interfaces (21).

3. Scaffolding bar (1) according to one of the preceding claims, characterized in that the gripping space (GR) extends along a gripper axis (GA) which is oriented perpendicular to the longitudinal axis (LA) and lies in a plane which is defined by the two boom axes (AA1, AA2), wherein the distance of the support surface (51) to the gripper axis (GA) is constant and the distance between the gripping surface (61) and the gripper axis (GA) can be changed by a movement of the gripping element (6), wherein the distance between the support surface (51) and the gripping surface (61) is smaller in a holding position of the closure (41, 42) than in an assembly position of the closure (41, 42).

4. Scaffolding bar (1) according to one of the preceding claims, characterized in that the closure (41, 42) has a bearing which supports the gripping element (6) so as to be linearly movable relative to the support element (5), wherein the direction of this linear mobility is oriented parallel to the longitudinal axis (LA) and / or the orientation of the gripping surface (61) relative to the support surface (51) is the same in the holding position and in the assembly position. Scaffolding bar (1) according to claim 4, characterized in that the clamping element (7) is wedge-shaped at least in some regions in a plane perpendicular to the gripper axis (GA), wherein a first side contour (71) is linear and oriented perpendicular to the longitudinal axis (LA) and a second side contour (72) is linear and oriented at an acute angle to the first side contour (71), wherein the first side contour (71) bears against a partial region of the support element (5) which is oriented at an incline to a plane oriented perpendicular to the longitudinal axis (LA), and the second side contour (72) bears against a partial region of the gripping element (6) which is oriented perpendicular to the longitudinal axis (LA), and the clamping element (7) can be actuated by a movement perpendicular to the longitudinal axis (LA) in order to change the distance between the support surface (51) and the gripping surface (61) and thus the size of the gripping space (GR). Scaffolding bar (1) according to claim 4,characterized in that the gripping element (6) has, on its side facing away from the support surface (51), a partial area extending in the direction of the longitudinal axis (LA), on which an external thread is arranged, and the clamping element (7) has an internal thread which is connected to the external thread of the gripping element (6), in particular wherein the clamping element (7) is designed as a cam nut, wherein a partial area of ​​the clamping element (7) arranged perpendicular to the direction of extension of the internal thread bears against an outer surface of the support element (5) oriented perpendicular to the longitudinal axis (LA), and a partial area of ​​the gripping element (6) arranged between the external thread and the gripping surface (61) is mounted in a recess in the support element (5) for linear movement in a direction parallel to the longitudinal axis (LA), and the clamping element (7) can be actuated by rotation about a rotation axis parallel to the longitudinal axis (LA),to change the distance between the support surface (51) and the gripping surface (61) and thus the size of the gripping space (GR). Scaffolding bar (1) according to one of claims 1 to 3, characterized in that the closure (41, 42) has a bearing which supports the gripping element (6) rotatably relative to the support element (5), the rotation axis of the bearing being parallel to the gripper axis, (GA) is oriented and / or the orientation of the gripping surface (61) relative to the support surface (51) in the holding position is different from the mounting position.

8. Scaffolding bar (1) according to claim 7, characterized in that the support element (5) has a guide surface (52) which adjoins the support surface (51), wherein the guide surface (52) is oriented at an acute angle to a plane which runs perpendicular to the longitudinal axis (LA) and is inclined in the direction of the boom (31, 32), wherein the guide surface (52) is set back in the direction of the longitudinal axis (LA) at least in regions relative to the support surface (51) and the support surface (51) surrounds the gripping space (GR) in the holding position in the circumferential direction around the gripper axis (GA) at an angle of at most 100°.

9. Scaffolding beam (1) according to one of the preceding claims, characterized in that the outriggers (31, 32) are mounted rotatably relative to the beam support (2), the axes of rotation of this mounting being oriented perpendicular to the longitudinal axis (LA) and perpendicular to the gripper axis (GA), whereby the angles (W) between the outrigger axes (AA1, AA2) and the longitudinal axis (LA) are variable.

10. Scaffolding bar (1) according to one of the preceding claims, characterized in that the connecting interfaces (21) project beyond the bar support (2) in the direction of the gripper axis (GA) and in the direction of the longitudinal axis (LA), wherein a partial area of ​​each connecting interface (21) extends from the bar support (2) in the direction of a closure (41, 42) and this partial area is arranged centered to a plane which is defined by the two boom axes (AA1, AA2).

11. Scaffolding bar (1) according to one of the preceding claims, characterized in that the connecting interfaces (21) project beyond the bar support (2) in the direction of the gripper axis (GA) and are flush with the bar support (2) in the direction of the longitudinal axis (LA) or are set back relative to the latter. Scaffolding section (100) comprising at least one scaffolding beam (1) according to one of the preceding claims, further comprising at least one scaffolding element (20) with a post (201) which comprises at least one beam support interface (202) which is fastened to the post (201), wherein the connection interface (21) of the scaffolding beam (1) is connected to the The bar support interface (202) of the scaffolding element (20) is positively connected, and the closure (41, 42) of the scaffolding bar (1) is positively and / or non-positively connected to an outer surface of the post (201) of the scaffolding element (20) in the holding position, wherein these two connection points are arranged at a distance from one another, in particular at a distance from one another in the longitudinal direction of the post (201). Method for constructing a scaffolding section (100) according to one of the preceding claims, comprising the steps A) transferring at least one closure (41, 41) of the scaffolding bar (1) into the assembly position, wherein the gripping element (6) is moved away from the support element (5) so far that the stem (201) of the scaffolding element (20) can be introduced into the gripping space (GR) between the gripping surface (61) and the support surface (51), B) connecting a connecting interface (21) of the bar support (2) with a bar support interface (202) of the scaffolding element (20) and inserting the stem (201) into the gripping space (GR) between the gripping surface (61) and the support surface (51), C) Transferring the closure (41, 42) of the scaffolding bar (1) into the holding position, wherein the tensioning element (7) is actuated and thereby the gripping element (6) with the gripping surface (61) is moved towards the support element (5) with the support surface (51) until the stem (201) is connected to the closure (41, 42) in a force-fitting and / or form-fitting manner.

Images