Scaffold crossbar and scaffold section

Abstract

A scaffold crossbar, particularly for the horizontally oriented installation in a scaffold section, comprising at least one crossbar beam which has a rod-shaped design and extends in the direction of a longitudinal axis, wherein the crossbar beam has two opposite ends in the direction of the longitudinal axis, and a connection interface which is provided for the connection to a scaffold element is arranged on each of these two ends. The scaffold crossbar further comprises at least two brackets which extend along a bracket axis, respectively, wherein the brackets respectively have two opposite ends in the direction of their bracket axis, wherein one of these ends of each bracket is connected to the crossbar beam, and at least two fasteners respectively one of which is arranged on the end of a bracket which is situated opposite of the connection of this bracket to the crossbar beam.

1 . A scaffold crossbar, for a horizontally oriented installation in a scaffold section, comprising:
 at least one crossbar beam that is rod-shaped and extends in a direction of a longitudinal axis, wherein the at least one crossbar beam has two opposite ends in the direction of the longitudinal axis, and a connection interface for connection to a scaffold element is arranged on each of the two opposite ends;   at least two brackets that extend along a bracket axis respectively, wherein the two bracket axes are respectively oriented at an angle of 1° to 89° to the longitudinal axis, and wherein the at least two brackets have two opposite ends in the direction of their bracket axis, respectively, wherein one of the two opposite ends of each bracket is connected to the crossbar beam; and   at least two fasteners respectively one of which is arranged on the end of a bracket which is disposed opposite of the connection of this bracket to the crossbar beam,   wherein the two connection interfaces of the at least one crossbar beam and the at least two fasteners together provide for at least four connection points for connecting the scaffold crossbar to other scaffold elements, and the connection interfaces differ from the fasteners in terms of shape and size,   wherein each fastener comprises a support element connected to the bracket which comprises a support surface which, at least in sections, is oriented perpendicular to the longitudinal axis and faces away from the respective bracket in the direction of the longitudinal axis,   and wherein each fastener comprises a gripping element that is supported so that it is movable relative to the support element, and which has a gripping surface which, at least in sections, is oriented perpendicular to the longitudinal axis and faces the respective bracket in the direction of the longitudinal axis,   wherein, in the direction of the longitudinal axis, a distance variable by a movement of the gripping element which defines a gripping space which is provided for accommodating a scaffold element exits between the support surface and the gripping surface,   and wherein each fastener 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 therefore the size of the gripping space can be changed by operating the clamping element.   
     
     
         2 . The scaffold crossbar according to  claim 1 , wherein, in the direction of the longitudinal axis, the distance between the gripping surfaces of the fasteners arranged opposite of each other is larger than an overall length of the crossbar beam including its two connection interfaces. 
     
     
         3 . The scaffold crossbar according to  claim 1 , wherein the gripping space extends along a gripper axis which is oriented perpendicular to the longitudinal axis and located in a plane which is defined by the two bracket 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 is changeable by a movement of the gripping element, wherein the distance between the support surface and the gripping surface is smaller in a retaining position of the fastener than in a mounting position of the fastener. 
     
     
         4 . The scaffold crossbar according to  claim 3 , wherein the fastener comprises a bearing which supports the gripping element so that it is linearly movable relative to the support element, wherein the direction of this linear movability is oriented parallel to the longitudinal axis. 
     
     
         5 . The scaffold crossbar according to  claim 4 , wherein the clamping element, at least in sections, has a wedge-shaped design in a plane perpendicular to the gripper axis, wherein a first lateral contour has a linear design and is oriented perpendicular to the longitudinal axis, and a second lateral contour has a linear design and is oriented at an acute angle to the first lateral contour, wherein the first lateral contour abuts on a portion of the support element which is oriented so that it is inclined with respect to a plane which is oriented perpendicular to the longitudinal axis, and the second lateral contour abuts on a portion of the gripping element which is oriented perpendicular to the longitudinal axis, and the clamping element is operable by a movement perpendicular to the longitudinal axis to change the distance between the support surface and the gripping surface and therefore the size of the gripping space. 
     
     
         6 . The scaffold crossbar according to  claim 4 , wherein the gripping element has a portion extending in the direction of the longitudinal axis on which a male thread is arranged on its side facing away from the support surface, and the clamping element has a female thread which is connected to the male thread of the gripping element, wherein a portion of the clamping element arranged perpendicular to the direction of extension of the female thread abuts on an outer surface of the support element oriented perpendicular to the longitudinal axis, and a portion of the gripping element disposed between the male thread and the gripping surface is supported in a recess in the support element so that it is linearly movable in a direction parallel to the longitudinal axis, and the clamping element is operable by a rotation about an axis of rotation parallel to the longitudinal axis to change the distance between the support surface and the gripping surface and therefore the size of the gripping space. 
     
     
         7 . The scaffold crossbar according to  claim 3 , wherein the fastener comprises a bearing which supports the gripping element so that it is rotatable relative to the support element, wherein the axis of rotation of the bearing is oriented parallel to the gripper axis. 
     
     
         8 . The scaffold crossbar according to  claim 7 , wherein the support element has a guide surface which adjoins the support surface, wherein the guide surface is oriented so that it is inclined at an acute angle to a plane which extends perpendicular to the longitudinal axis and inclined in the direction of the bracket, wherein the guide surface, at least in sections, is set back with respect to the support surface in the direction of the longitudinal axis, and the support surface encloses the gripping space in a circumferential direction around the gripper axis at an angle not exceeding 100° in the retaining position. 
     
     
         9 . The scaffold crossbar according to  claim 8 , wherein the brackets are supported so that they are rotatable relative to the crossbar beam, wherein rotational axes of the bearings are oriented perpendicular to the longitudinal axis and perpendicular to the gripper axis so that the angles between the bracket axes and the longitudinal axis are variable. 
     
     
         10 . The scaffold crossbar according to  claim 9 , wherein the connection interfaces protrude beyond the crossbar beam in the direction of the gripper axis and in the direction of the longitudinal axis, wherein a portion of each connection interface, starting from the crossbar beam, extends in the direction of a fastener, and this portion is arranged so that it is centred with respect to a plane which is defined by the two bracket axes. 
     
     
         11 . The scaffold crossbar according to  claim 10 , wherein the connection interfaces protrude beyond the crossbar beam in the direction of the gripper axis and are flush with or set back relative to the crossbar beam in the direction of the longitudinal axis. 
     
     
         12 . A scaffold section comprising:
 at least one scaffold crossbar according to  claim 1 , further comprising:   at least one scaffold element including a pole which comprises at least one crossbar support interface which is attached to the pole,   wherein the connection interface of the scaffold crossbar is positively connected to the crossbar support interface of the scaffold element, and the fastener of the scaffold crossbar is positively and/or non-positively connected to an outer shell of the pole of the scaffold element in a retaining position, wherein these two connection points are arranged at a distance to each other.   
     
     
         13 . A method for assembling a scaffold section according to  claim 1 , comprising the steps of:
 transferring at least one fastener of the scaffold crossbar into a mounting position, wherein the gripping element is moved away from the support element to the extent that a pole of the scaffold element can be introduced into the gripping space between the gripping surface and the support surface,   connecting a connection interface of the crossbar beam to a crossbar support interface of the scaffold element, and introducing the pole into the gripping space between gripping surface and support surface,   transferring the fastener of the scaffold crossbar into a retaining position, wherein the clamping element is operated and the gripping element including the gripping surface is thereby moved towards the support element including the support surface until the pole is non-positively and/or positively connected to the fastener.   
     
     
         14 . The scaffold crossbar according to  claim 4 , wherein the orientation of the gripping surface relative to the support surface is identical in the retaining position and in the mounting position. 
     
     
         15 . The scaffold crossbar according to  claim 3 , wherein the fastener comprises a bearing which supports the gripping element so that it is linearly movable relative to the support element, wherein the orientation of the gripping surface relative to the support surface is identical in the retaining position and in the mounting position. 
     
     
         16 . The scaffold crossbar according to  claim 6 , wherein the clamping element is implemented as a cam nut. 
     
     
         17 . The scaffold crossbar according to  claim 7 , wherein the orientation of the gripping surface relative to the support surface is different in the retaining position and in the mounting position. 
     
     
         18 . The scaffold crossbar according to  claim 3 , wherein the fastener comprises a bearing which supports the gripping element so that it is rotatable relative to the support element, wherein the orientation of the gripping surface relative to the support surface is different in the retaining position and in the mounting position. 
     
     
         19 . The scaffold section according to  claim 12 , wherein these two connection points are arranged at a distance to each other in the longitudinal direction of the pole.