SCAFFOLDING, ESPECIALLY MOBILE SCAFFOLDING

Description

[0001] The invention relates to a scaffold, in particular a mobile scaffold, having the features of the preamble of claim 1. Technological background and state of the art

[0002] From DE 10 2008 051 135 A1 and the parallel EP 2 175 087 A1 by the applicant, a mobile scaffold and a method for assembling and disassembling this mobile scaffold are known. Such a mobile scaffold can also be referred to as a mobile work platform. During the erection of this mobile scaffold, a side guard rail consisting of a single scaffold strut is mounted in advance, or two such side guard rails are mounted in advance at a horizontal distance from one another, on horizontal rungs of support frames, which are also referred to as ladders. The or each individual support strut extends in a straight line along its longitudinal axis and has support strut ends extending away from one another in opposite directions, each of which is designed as a locking claw.

[0003] Such locking claws are known, for example, from DE 37 02 152 A1 and the parallel EP 0 276 489, as well as from DE 38 22 215 A1 and the parallel EP 0 348 885 A2. They enable a positive and secure fastening of components having these locking claws, such as scaffold decks, diagonal braces, and / or horizontal braces, to other scaffold braces with a round cross-section, wherein they are pivotable relative to these other scaffold braces in the secured state.

[0004] To erect or assemble the mobile scaffold, the structure starts from a first level, preferably a first scaffold deck, a lower level consisting of a vertically positioned first support frame and a second support frame positioned vertically at a horizontal distance therefrom, as well as a first scaffold deck. Each support frame is a ladder consisting of two support struts and several horizontal rungs that extend parallel and equally spaced between the two support struts and are rigidly connected to each of the two support struts.

[0005] Starting from the first level, a third support frame designed as a third ladder with several horizontal rungs is first suspended either on the two first scaffold struts or on the additional component in a vertical intermediate assembly position either with the aid of two first scaffold struts, which can be or are installed later as diagonal braces for diagonal bracing of the mobile scaffold, or with the aid of an additional component having one or more support frame suspension hooks, which function or function as a support frame suspension device during assembly of the mobile scaffold, wherein the two first scaffold struts or the additional component are or are supported on the already erected, lower, first support frame, which is designed as a first ladder with several horizontal rungs.Subsequently, two individual, straight-line extending, second scaffold struts, which also each have a suspension unit in the form of a snap-in claw at their scaffold strut ends extending away from each other in opposite directions, are mounted as follows: First, a first, second scaffold strut of the two individual, second scaffold struts is releasably suspended with the first snap-in claw of its two snap-in claws on an uppermost rung of an upper, fourth support frame, which is designed as a fourth ladder with several horizontal rungs and which has already been placed on the lower, second support frame designed as a third ladder with several horizontal rungs.Subsequently, the first second scaffold strut is hooked with the second locking claw of its two locking claws onto a top rung of the third support frame in its intermediate assembly position. For this purpose, the third support frame was previously moved from its vertical intermediate assembly position, still vertically supported either by the two first scaffold struts or by the additional component, into an inclined intermediate assembly position by pivoting relative to the first support frame about a horizontal pivot axis. Subsequently, or even previously, the second, second scaffold strut of the two individual, second scaffold struts is releasably hooked onto the top rung of the upper, fourth support frame with the first locking claw of its two locking claws.The second scaffolding strut of the two second scaffolding struts is then hooked into the top rung of the third support frame, which is in its slanted intermediate assembly position, with the second locking claw of its two locking claws. The third support frame, which is in its slanted intermediate assembly position, is then guided upwards together with the two individual second scaffolding struts attached to it so that they can pivot relative to it and placed on the already assembled, lower, first support frame. This brings the two individual second scaffolding struts into a horizontal position of use, in which they each form a simple, advanced side guard rail for a second level, which directly adjoins the first level. In their position of use, the two simple side guard rails are then each approximately three meters above a first standing height orabove the first scaffold deck. The first two scaffold struts, which were used for the intermediate support of the third support frame, are then mounted as diagonal braces for reinforcement or, if the separate additional component is used, two scaffold struts are mounted as diagonal braces for reinforcement. A second scaffold deck is then hooked onto the third support frame and the fourth support frame at a height of approximately two metres above the first standing height or above the first scaffold deck, each to a rung of the third support frame and the fourth support frame. Each side guard rail of the two simple side guard rails mounted in front is then located approximately one metre above a second standing height or above the second scaffold deck. The two individual, simple side guard rails therefore each form a hip or hip guard rail.Back railings to protect against falling persons from the second scaffold deck. Such individual, simple side guard rails, designated there with the reference numerals 18.1 and 18.2, do protect against falling persons at hip height, but do not provide sufficient protection. Therefore, additional guard rail elements must be installed on this mobile scaffold tower as knee protection elements, which are also referred to as knee rails. In the exemplary embodiments shown there, these are also individual, simple side guard rails, each in the form of a straight scaffold strut with locking claws at both ends. Such knee rails must be handled and installed separately. This makes the assembly and disassembly of the mobile scaffold tower difficult and time-consuming.These simple side guard rails, each consisting of a single straight scaffolding strut, can be subsequently removed due to their design, even from the second or next higher level defined and protected by them. If even just one of the two locking claws of these individual, simple side guard rails is accidentally or intentionally left unengaged, or accidentally or intentionally released without authorization, this poses a significant safety risk, endangering the life and limb not only of those on the assigned scaffolding level, but also of others below that level.

[0006] To enable simpler and faster installation of a side protection railing that offers greater stability, so-called double side protection railings have become known. These have both an upper strut for installation at hip height as a handrail and at least one lower strut for installation as a knee guard or knee rail. Such double side protection railings are known, for example, from DE 79 25 492 U, DE 297 14 266 U, FR 2 887 574 A1, FR 2 887 907 A1, FR 2 908 804 A1, DE 10 2009 041 437 and the parallel EP 2 299 028 A2, as well as DE 10 2009 041 448 A1. The side protection double railings disclosed there also all have the disadvantage that they can be subsequently removed from the floor they delimit and protect, even by unauthorized persons, which can also create a considerable safety risk with a danger to life and limb.

[0007] EP 1 035 271 A1 and DE 201 05 534 U1 each disclose a truss girder for the lateral support of a roof truss, also referred to as a truss unit, of a quickly assembled hall roof. The truss girder is also referred to therein as a truss bar. Each truss girder has a rectilinear upper chord, a rectilinear lower chord extending parallel to the upper chord, and three diagonal struts as well as two parallel cross struts, each extending between the upper chord and the lower chord and rigidly connected to the upper chord and the lower chord. The upper chord of the truss girder has two upper chord ends that extend away from each other in opposite directions and are each formed with an upper chord suspension unit. Each upper chord suspension unit has a claw with a suspension opening.The hooking openings of the claws of the upper chord hooking units of the upper chord are open downwards in the same direction and can each be hooked onto a tubular profile of a roof truss, whereby the tubular profile, when hooked in, is partially received in the associated hooking opening of the corresponding claw. The lower chord of the truss girder has two lower chord ends that extend away from each other in opposite directions and each is formed with a lower chord engaging claw. Each lower chord engaging claw has a claw and a spring-loaded pawl for securing a tubular profile of a roof truss that can be partially received in the respective claw. The claws of the lower chord engaging claws of the lower chord each have a hooking opening.The hook-in openings of the claws of the lower chord's locking claws are open downward in the same direction as the two hook-in openings of the claws of the two upper chord hook-in units of the upper chord. While such truss girders could, provided they are appropriately dimensioned, possibly be hooked into two rungs of a ladder provided that they are provided at a suitable vertical distance from each other on the respective ladder, such truss girders could then not be mounted in advance as a side protection double railing without a safety risk. Above all, such truss girders could easily be dismantled from the floor they are intended to delimit and protect, even by unauthorized persons. This would pose a significant safety risk. Another scaffold with an advance railing is known from EP 2 180 117 A2. Summary of the invention

[0008] Based on the aforementioned DE 10 2008 051 135 A1 and the parallel EP 2 175 087 A1, the invention is based on the object of providing a scaffold, in particular a mobile scaffold, which can be assembled or disassembled more easily and quickly, which has greater stability and which offers greater safety against persons falling.

[0009] This object is achieved by the features of claim 1. Accordingly, the invention relates to a scaffold or a mobile scaffold which is constructed with at least two vertical ladders, with at least one horizontal scaffold deck and with at least one side protection railing to protect persons from falling from the scaffold deck, wherein each ladder of the at least two ladders has at least two parallel vertical struts and a plurality of, preferably parallel, rungs, which each extend between a first vertical strut and a second vertical strut of the at least two vertical struts of the respective ladder at, preferably equal, rung vertical distances from each other and which are each firmly, preferably rigidly, connected to the first vertical strut and the second vertical strut of the respective ladder, and wherein a vertical first ladder and a vertical second ladder of the at least two ladders are at a ladder horizontal distance,are preferably arranged substantially parallel to one another vertically, and wherein the at least one scaffolding deck extends between the first ladder and the second ladder and is detachably fastened to both the first ladder and the second ladder, and wherein a side protection double railing, which can be mounted in advance or is mounted in advance, is fastened to the first ladder and to the second ladder, which extends between the first ladder and the second ladder and which has an upper strut extending above the at least one scaffolding deck, a lower strut arranged at least partially or substantially or completely above the at least one scaffolding deck, and a plurality of connecting struts, preferably one or more cross struts and / or one or more diagonal struts, which are each firmly, preferably rigidly, connected to the lower strut and to the upper strut,and wherein - either - the top strut of the side protection double railing has a first top strut end with a first top strut suspension unit with a first top strut suspension claw, preferably having a U-shaped or semicircular or J-shaped cross-section, which has first top strut suspension claw sides pointing away from each other, preferably in opposite directions, and which is open towards its first top strut suspension claw sides and in a first plug-on direction and by means of which the top strut is detachably fastened to a first, preferably uppermost, rung of the rungs of the first ladder, preferably in a form-fitting manner, and pivotably in a first vertical pivot plane relative to the first ladder, and wherein the top strut of the side protection double railing has a first top strut end extending from the first top strut end, preferably in an opposite direction,a second upper strut end extending away, with a second upper strut suspension unit having a second upper strut suspension claw, preferably having a U-shaped or semicircular or J-shaped cross-section, which has second upper strut suspension claw sides pointing away from each other, preferably in opposite directions, and which is open towards its second upper strut suspension claw sides and in a second attachment direction, preferably parallel to the first attachment direction, and by means of which the upper strut is detachably, preferably positively, fastened to a second, preferably uppermost, rung of the rungs of the second ladder and pivotably fastened in a second vertical pivot plane relative to the second ladder, and wherein the upper strut of the side protection double railing has a top strut length which is greater than a first rung horizontal distance which the first rung of the first ladder and the,preferably arranged at a substantially identical first height as the first rung of the first ladder, second rung of the second ladder, and wherein the upper strut of the side protection double railing overlaps the first rung of the first ladder at least in the region of its first upper strut end, preferably which is arranged directly above the first rung of the first ladder, and wherein the upper strut of the side protection railing overlaps the second rung of the second ladder at least in the region of its second upper strut end, preferably which is arranged directly above the second rung of the second ladder, and wherein the lower strut of the side protection double railing has a lower strut length which is greater than a second rung horizontal distance, preferably corresponding to the first rung horizontal distance, which a third rung of the rungs of the first ladder and a,a fourth rung of the rungs of the second ladder, preferably arranged at a substantially identical second height to the third rung of the first ladder, and wherein the third rung of the first ladder is arranged at a first rung vertical distance below the first rung of the first ladder, preferably next to the first rung downwards, and wherein the fourth rung of the second ladder is arranged at a second rung vertical distance, preferably corresponding to the first rung vertical distance, below the second rung of the second ladder, preferably next to the second rung downwards, and wherein the lower strut of the side protection double railing has a first lower strut end and a second lower strut end extending away therefrom, preferably in an opposite direction,and wherein the lower strut of the side protection double railing engages under the third rung of the first ladder at least in the region of its first lower strut end, preferably which is arranged directly below the third rung of the first ladder, and wherein the lower strut of the side protection double railing engages under the fourth rung of the second ladder at least in the region of its second lower strut end, preferably which is arranged directly below the fourth rung of the second ladder,and wherein the upper strut of the side protection double railing, at least in the region of its first upper strut end and at least in the region of its second upper strut end, as well as the lower strut of the side protection double railing, at least in the region of its first lower strut end and at least in the region of its second lower strut end, and the first rung and the third rung of the first ladder, as well as the second rung and the fourth rung of the second ladder, are designed and arranged in such a way that the side protection double railing cannot be dismantled without dismantling the first ladder or the second ladder - or - the lower strut of the side protection double railing has a first lower strut end with a first lower strut suspension unit with a first lower strut suspension claw, preferably having a U-shaped or semicircular or J-shaped cross-section, which, preferably in opposite directions,has first lower strut suspension claw sides facing away from one another and which is open towards its first lower strut suspension claw sides and in a third plug-on direction and by means of which the lower strut is detachably, preferably positively, fastened to a third rung of the rungs of the first ladder and pivotable in a third vertical pivot plane relative to the first ladder, and wherein the lower strut of the side protection double railing has a second lower strut end extending away from the first lower strut end, preferably in an opposite direction, with a second lower strut suspension unit, preferably having a U-shaped or semicircular or J-shaped cross-section, with a second lower strut suspension claw, which, preferably in opposite directions,has second lower strut suspension claw sides facing away from each other and which is open towards its second lower strut suspension claw sides and in a fourth attachment direction, preferably parallel to the third attachment direction, and by means of which the lower strut is detachably, preferably positively, fastened to a fourth rung of the rungs of the second ladder and pivotably fastened in a fourth vertical pivot plane relative to the second ladder, and wherein the lower strut of the side protection double railing has a lower strut length which is greater than a third rung horizontal distance which the third rung of the first ladder and the fourth rung of the second ladder, which is preferably arranged at a substantially same third height as the third rung of the first ladder, have from each other, and wherein the lower strut of the side protection double railing, at least in the region of its first lower strut end,preferably which is arranged directly above the third rung of the first ladder, overlaps the third rung of the first ladder, and wherein the lower strut of the side protection railing at least in the region of its second lower strut end, preferably which is arranged directly above the fourth rung of the second ladder, overlaps the fourth rung of the second ladder, and wherein the upper strut of the side protection double railing has an upper strut length which is greater than a fourth rung horizontal distance, preferably corresponding to the third rung horizontal distance, which a first rung of the rungs of the first ladder and a second rung of the rungs of the second ladder, preferably arranged at a substantially same fourth height as the third rung of the first ladder, have from each other, and wherein the first, preferably uppermost,Rung of the first ladder is arranged at a third rung vertical distance above the third rung of the first ladder, preferably next to the third rung upwards, and wherein the second, preferably uppermost, rung of the second ladder is arranged at a fourth rung vertical distance, preferably corresponding to the third rung vertical distance, above the fourth rung of the second ladder, preferably next to the fourth rung upwards, and wherein the upper strut of the side protection double railing has a first upper strut end and a second upper strut end extending away therefrom, preferably in an opposite direction, and wherein the upper strut of the side protection double railing engages under the first rung of the first ladder at least in the region of its first upper strut end, preferably which is arranged directly below the first rung of the first ladder,and wherein the upper strut of the side protection double railing engages under the second rung of the second ladder at least in the region of its second upper strut end, preferably which is arranged directly below the second rung of the second ladder, and wherein the lower strut of the side protection double railing at least in the region of its first lower strut end and at least in the region of its second lower strut end, as well as the upper strut of the side protection double railing at least in the region of its first upper strut end and at least in the region of its second upper strut end, and the second rung and the fourth rung of the first ladder as well as the first rung and the third rung of the second ladder are designed and arranged in such a way that the side protection double railing cannot be dismantled without dismantling the first ladder or the second ladder.

[0010] According to a preferred embodiment, it can be provided that - either - the upper strut of the side protection double railing, at least in the region of its first upper strut end, and the lower strut of the side protection double railing, at least in the region of its first lower strut end, have a first strut vertical distance from each other that is only slightly greater than the first rung vertical distance, and wherein the upper strut of the side protection double railing, at least in the region of its second upper strut end, and the lower strut of the side protection double railing, in the region of its second lower strut end, have a second strut vertical distance from each other,which is only slightly larger than the second rung vertical spacing - or - the top strut of the double side protection railing, at least in the area of ​​its first top strut end, and the bottom strut of the double side protection railing, at least in the area of ​​its first bottom strut end, have a third strut vertical spacing from each other that is only slightly larger than the third rung vertical spacing, and wherein the top strut of the double side protection railing, at least in the area of ​​its second top strut end, and the bottom strut of the double side protection railing, at least in the area of ​​its second bottom strut end, have a fourth strut vertical spacing from each other that is only slightly larger than the fourth rung vertical spacing. This further improves the safety of the mobile scaffold.

[0011] According to a particularly preferred embodiment, it can be provided that - either - the first strut vertical distance is designed to match the first rung vertical distance such that the first upper strut suspension claw can at most be lifted upwards from the first rung of the first ladder to such an extent that the first upper strut suspension claw cannot be removed from the first rung of the first ladder, and wherein the second strut vertical distance is designed to match the second rung vertical distance such that the second upper strut suspension claw can at most be lifted upwards from the second rung of the second ladder to such an extent that the second upper strut suspension claw cannot be removed from the second rung of the second ladder - or - the third strut vertical distance is designed to match the third rung vertical distance such thatthat the first lower strut attachment claw can only be lifted upwards from the third rung of the first ladder to such an extent that the first lower strut attachment claw cannot be removed from the third rung of the first ladder, and wherein the fourth strut vertical spacing is designed in such a way that the fourth strut vertical spacing is matched to the fourth rung vertical spacing that the second lower strut attachment claw can only be lifted upwards from the third rung of the first ladder to such an extent that the second lower strut attachment claw cannot be removed from the third rung of the first ladder. This significantly increases the safety of the scaffold against persons falling from it.

[0012] According to a further development, it can be provided that - either - the first lower strut end of the lower strut extends in a first space which is delimited by two immediately consecutive rungs of the first ladder and by the associated two vertical struts of the first ladder, and the second lower strut end of the lower strut extends in a second space which is delimited by two immediately consecutive rungs of the second ladder and by the associated two vertical struts of the second ladder - or - the first upper strut end of the upper strut extends in a third space which is delimited by two immediately consecutive rungs of the first ladder and by the associated two vertical struts of the first ladder, and the second upper strut end of the upper strut extends in a fourth space,which is limited by two consecutive rungs of the second ladder and by the two associated vertical struts of the second ladder. This further increases the safety of the scaffold.

[0013] According to one embodiment, it can be provided that - either - the lower strut has, between its two lower strut ends, a lower strut middle part containing a lower strut center of the lower strut, which has lower strut middle part ends pointing away from one another, preferably in opposite directions, from which a respective lower strut part of the lower strut points in a first transverse direction towards the upper strut and / or in a second transverse direction away from the respective upper strut end of the upper strut.is bent towards the respectively associated vertical strut of the first and second ladders - or - the upper strut has, between its two upper strut ends, an upper strut middle section containing an upper strut center of the upper strut, which has upper strut middle section ends pointing away from each other, preferably in opposite directions, of which a respective upper strut section of the upper strut is bent in a third transverse direction towards the lower strut and / or in a fourth transverse direction away from the respective lower strut end of the lower strut or towards the respectively associated vertical strut of the first and second ladders. This allows existing ladders to be advantageously used in combination with the side protection double railing with increased safety.

[0014] According to a particularly preferred embodiment, it can be provided that - either - the lower strut has, in the region of its two lower strut ends, a lower strut end section, which is bent from the lower strut middle section twice or in more than two, preferably three, directions - or - the upper strut has, in the region of its two upper strut ends, a top strut end section, which is bent from the upper strut middle section twice or in more than two, preferably three, directions. In conjunction with the above advantages, this allows for particularly advantageous fastening options for the lower strut.

[0015] According to one embodiment, it can be provided that - either - the lower strut middle section extends rectilinearly along a lower strut middle section longitudinal axis of the lower strut middle section parallel to a top strut longitudinal axis of the top strut, along which the top strut extends, wherein the top strut longitudinal axis extends in an imaginary first plane or vertical plane containing the lower strut middle section longitudinal axis - or - the top strut middle section extends rectilinearly along a top strut middle section longitudinal axis of the top strut middle section parallel to a lower strut longitudinal axis of the bottom strut, along which the bottom strut extends, wherein the bottom strut longitudinal axis extends in an imaginary second plane or vertical plane containing the upper strut middle section longitudinal axis. This enables a simple, stable, and cost-effective construction of the double side protection railing or the scaffolding according to the invention constructed therewith.

[0016] According to a particularly preferred embodiment, it can be provided that - either - each lower strut end part extends rectilinearly along a lower strut end part longitudinal axis of the respective lower strut end part, which extends parallel to the lower strut middle part longitudinal axis of the lower strut middle part, preferably upwards or offset to a first side relative to the lower strut middle part longitudinal axis, or - each upper strut end part extends rectilinearly along an upper strut end part longitudinal axis of the respective upper strut end part, which extends parallel to the upper strut middle part longitudinal axis of the upper strut middle part, preferably downwards or offset to a second side relative to the upper strut middle part longitudinal axis. This allows the above advantages to be further improved.

[0017] According to a further development, it can be provided that - either - each lower strut end part is arranged laterally offset from the lower strut middle part in a fifth transverse direction, preferably toward or outward from the directly associated vertical strut of the associated ladder - or - each upper strut end part is arranged laterally offset from the upper strut middle part in a sixth transverse direction, preferably toward or outward from the directly associated vertical strut of the associated ladder. This allows the above advantages to be further improved.

[0018] According to a further development, it can be provided that - either - the upper strut is formed with a straight, preferably tubular, upper strut rod element extending along a top strut longitudinal axis of the upper strut or along the top strut longitudinal axis of the upper strut, which has a first top strut rod element end which is connected to the first top strut suspension unit or to which the first top strut suspension unit is fastened, and which has a second top strut rod element end extending away from the first top strut rod element end in an opposite direction, which is connected to the second top strut suspension unit or to which the second top strut suspension unit is fastened - or - the bottom strut is formed with a straight, preferably tubular,A sub-strut bar element is formed, which has a first sub-strut bar element end connected to the first sub-strut suspension unit or to which the first sub-strut suspension unit is attached, and which has a second sub-strut bar element end extending away from the first sub-strut bar element end in an opposite direction, which is connected to the second sub-strut suspension unit or to which the second sub-strut suspension unit is attached. This enables a further simplified and more cost-effective construction.

[0019] According to a preferred embodiment, the length of the upper strut of the upper strut can be substantially or approximately the same as the length of the lower strut of the lower strut. This allows the double side protection railing to be handled particularly easily and quickly, and its installation and removal can be carried out particularly quickly and easily.

[0020] According to a particularly preferred embodiment, it can be provided that - either - the first lower strut end of the lower strut has a first lower strut fastening unit with a first lower strut claw, preferably having a U-shaped, semicircular, or J-shaped cross-section, for receiving the first or second vertical strut of the first ladder and with a first locking element for locking the first lower strut claw to an associated vertical strut of the first ladder, and the second lower strut end of the lower strut has a second lower strut fastening unit with a second lower strut claw, preferably having a U-shaped, semicircular, or J-shaped cross-section, for receiving the first or second vertical strut of the second ladder and with a second locking element for locking the second lower strut claw to an associated vertical strut of the second ladder,wherein the first lower strut claw has first lower strut claw sides facing away from each other, preferably in opposite directions, and is open towards its first lower strut claw sides and in a fifth attachment direction, preferably towards an outer side of the side protection double railing, and the second lower strut claw has second lower strut claw sides facing away from each other, preferably in opposite directions, and is open towards its second lower strut claw sides and in a sixth attachment direction, preferably parallel to the third attachment direction, in particular towards the same outer side of the side protection double railing, and wherein the first locking element can be transferred into a first open position, preferably against the spring force of a first spring, in particular when attached to the associated vertical strut, automatically or by manual actuation,in which the first lower strut claw can be plugged onto the associated vertical strut of the first ladder in the fifth plug-on direction, and can be transferred from the first open position, preferably due to a spring restoring force of the first spring or by manual actuation or due to gravity, into a first locking position, in which the first lower strut claw can be positively locked to the associated vertical strut against removal from the associated vertical strut, and the first lower strut claw can be releasably fastened or is releasably fastened to the associated vertical strut of the first ladder by means of the first locking element located in its first locking position, and wherein the second locking element can be transferred into a second open position, preferably against the spring force of a second spring, in particular when plugged onto the associated vertical strut automatically or by manual actuation,in which the second lower strut claw can be plugged onto the associated vertical strut of the second ladder in the sixth plug-on direction, and can be transferred from the second open position, preferably due to a spring restoring force of the second spring or by manual actuation or due to gravity, into a second locking position, in which the second lower strut claw can be positively locked to the associated vertical strut against removal from the associated vertical strut and the second lower strut claw is detachably fastened or detachably fastened to the associated vertical strut of the second ladder by means of the second locking element located in its second locking position - or - the first upper strut end of the upper strut has a first upper strut fastening unit with a, preferably having a U-shaped or semicircular or J-shaped cross-section,first upper strut claw for receiving the first or second vertical strut of the first ladder and with a third locking element for locking the first upper strut claw with an associated vertical strut of the first ladder, and the second upper strut end of the upper strut has a second upper strut fastening unit with a second upper strut claw, preferably having a U-shaped or semicircular or J-shaped cross-section, for receiving the first or second vertical strut of the second ladder and with a fourth locking element for locking the second upper strut claw with an associated vertical strut of the second ladder, wherein the first upper strut claw has first upper strut claw sides pointing away from each other, preferably in opposite directions, and towards its first upper strut claw sides and in a seventh plug-on direction,preferably towards an outer side of the side protection double railing, and the second upper strut claw has second upper strut claw sides pointing away from each other, preferably in opposite directions, and is open towards its second upper strut claw sides and in an eighth plug-on direction, preferably parallel to the seventh plug-on direction, in particular towards the same outer side of the side protection double railing, and wherein the third locking element can be transferred, preferably against the spring force of a third spring, in particular when plugged onto the associated vertical strut automatically, or by manual actuation, into a third open position, in which the first upper strut claw can be plugged onto the associated vertical strut of the first ladder in the seventh plug-on direction, and from the third open position,preferably due to a spring restoring force of the third spring or by manual actuation or due to gravity, can be transferred into a third locking position, in which the first upper strut claw can be positively locked to the associated vertical strut against removal from the associated vertical strut and the first upper strut claw can be releasably fastened or is releasably fastened to the associated vertical strut of the first ladder by means of the third locking element located in its third locking position, and the fourth locking element, preferably against the spring force of a fourth spring, in particular when plugged onto the associated vertical strut automatically, or by manual actuation, can be transferred into a fourth opening position, in which the second upper strut claw can be plugged onto the associated vertical strut of the second ladder in the eighth plugging direction, and from the fourth opening position,Preferably, due to a spring return force of the fourth spring, or by manual actuation, or due to gravity, it can be transferred into a fourth locking position, in which the second upper strut claw can be positively locked to the associated vertical strut to prevent it from being removed from the associated vertical strut, and the second upper strut claw can be releasably fastened or is releasably fastened to the associated vertical strut of the second ladder by means of the fourth locking element in its fourth locking position. This significantly increases the stability and safety of the scaffold.

[0021] According to a particularly advantageous embodiment, it can be provided that - either - the first lower strut claw of the first lower strut fastening unit is open in the fifth plug-on direction perpendicular to the first plug-on direction, in which the first upper strut suspension claw of the first upper strut suspension unit is open, and the second lower strut claw of the second lower strut fastening unit is open in the sixth plug-on direction perpendicular to the second plug-on direction, in which the second upper strut suspension claw of the second upper strut suspension unit is open - or - the first upper strut claw of the first upper strut fastening unit is open in the seventh plug-on direction perpendicular to the third plug-on direction, in which the first lower strut suspension claw of the first lower strut suspension unit is open,and the second upper strut claw of the second upper strut fastening unit is open in the eighth mounting direction perpendicular to the fourth mounting direction in which the second lower strut suspension claw of the second lower strut suspension unit is open.

[0022] In other words, it can be provided that - either - the first lower strut claw, which is open in one or the fifth attachment direction, is arranged rotated at a first angle of 90 degrees around the upper strut longitudinal axis of the upper strut relative to the first upper strut suspension claw, which is open in the first attachment direction, and the second lower strut claw, which is open in one or the sixth attachment direction, is arranged rotated at a second angle of 90 degrees around the upper strut longitudinal axis of the upper strut relative to the second upper strut suspension claw, which is open in the second attachment direction, or - the first upper strut claw, which is open in one or the seventh attachment direction, is arranged rotated at a third angle of 90 degrees around the lower strut longitudinal axis of the lower strut relative to the first lower strut suspension claw, which is open in the third attachment direction, and the second upper strut claw, which is open in one or the eighth attachment direction, is arranged rotated at a third angle of 90 degrees around the lower strut longitudinal axis of the lower strut relative to the fourthThe second lower strut suspension claw, open in the direction of attachment, is arranged at a fourth angle of 90 degrees around the lower strut's longitudinal axis. Due to these seemingly simple measures, the above-mentioned advantages of the double side protection railing or the scaffolding according to the invention can be realized to a particularly high degree.

[0023] The safety and stability of the scaffold can be further increased if - either - the first top strut end or the first top strut suspension unit of the top strut has a fifth locking element for locking the first top strut suspension claw to the first rung of the first ladder and the second top strut end or the second top strut suspension unit of the top strut has a sixth locking element for locking the second top strut suspension claw to the second rung of the second ladder, wherein the first top strut suspension claw has first top strut suspension claw sides pointing away from each other, preferably in opposite directions, and is open towards its first top strut suspension claw sides and in the first attachment direction, and wherein the second top strut suspension claw, preferably in opposite directions,has second upper strut claw sides facing away from each other and is open towards its second upper strut suspension claw sides and in the second attachment direction, and wherein the fifth locking element can be transferred, preferably against the spring force of a spring, in particular when the first upper strut suspension claw is attached to the first rung of the first ladder, automatically or by manual actuation, into a fifth open position in which the first upper strut suspension claw can be attached to the first rung of the first ladder in the first attachment direction, and can be transferred from the fifth open position, preferably due to a spring restoring force of the spring or due to manual actuation or due to gravity, into a fifth locking position in which the first upper strut suspension claw is locked to the first rung of the first ladder against removal from the first rung of the first ladder,and wherein the sixth locking element, preferably against the spring force of a spring, in particular when the second upper strut suspension claw is attached to the second rung of the second ladder, can be moved automatically or by manual actuation into a sixth open position, in which the second upper strut suspension claw can be attached to the second rung of the second ladder in the second attachment direction, and can be moved from the sixth open position into a sixth locking position,in which the second upper strut suspension claw is locked to the second rung of the second ladder to prevent it from being removed from the second rung of the second ladder - or - the first lower strut end or the first lower strut suspension unit of the lower strut has a seventh locking element for locking the first lower strut suspension claw to the third rung of the first ladder, and the second lower strut end or the second lower strut suspension unit of the lower strut has an eighth locking element for locking the second lower strut suspension claw to the fourth rung of the first ladder, wherein the first lower strut suspension claw has first lower strut suspension claw sides facing away from each other, preferably in opposite directions, and is open towards its first lower strut suspension claw sides, preferably in opposite directions and in the third insertion direction,and wherein the second lower strut attachment claw has second lower strut attachment claw sides facing away from each other, preferably in opposite directions, and is open towards its second lower strut attachment claw sides, preferably in opposite directions and in the fourth insertion direction, and wherein the seventh locking element can be transferred, preferably against the spring force of a spring, in particular when the first lower strut attachment claw is attached to the third rung of the first ladder, automatically or by manual actuation, into a seventh open position, in which the first lower strut attachment claw can be attached to the third rung of the first ladder in the third insertion direction, and can be transferred from the seventh open position, preferably due to a spring restoring force of the spring or by manual actuation or due to gravity, into a seventh locking position,in which the first lower strut claw is locked to the third rung of the first ladder to prevent it from being removed from the third rung of the first ladder, and wherein the eighth locking element can be moved, preferably against the spring force of a spring, in particular when the second lower strut suspension claw is attached to the fourth rung of the second ladder, automatically or by manual actuation, into an eighth open position, in which the second lower strut suspension claw can be attached to the fourth rung of the second ladder in the fourth attachment direction, and from the eighth open position, preferably due to a spring restoring force of the spring or due to manual actuation or gravity, into an eighth locking position, in which the second lower strut claw is locked to the fourth rung of the second ladder to prevent it from being removed from the fourth rung of the second ladder.

[0024] According to a preferred development, it can be provided that - either - the first lower strut fastening unit and the second lower strut fastening unit are designed identically or differently - or - that the first upper strut fastening unit and the second upper strut fastening unit are designed identically or differently and / or that - either - the first upper strut suspension unit and the second upper strut suspension unit are designed identically or differently - or - the first lower strut suspension unit and the second lower strut suspension unit are designed identically or differently. This allows the double side protection railing or the scaffolding provided with it to be manufactured particularly easily and cost-effectively, or allows expanded applications to be realized.

[0025] According to a particularly preferred embodiment, it can be provided that - either - the first lower strut fastening unit, the second lower strut fastening unit, the first upper strut suspension unit, and the second upper strut suspension unit are designed identically or differently - or - the first upper strut fastening unit, the second upper strut fastening unit, the first lower strut suspension unit, and the second lower strut suspension unit are designed identically or differently. This either allows a particularly cost-effective and simple construction of the double side protection railing or the scaffolding equipped with it to be achieved, or allows for expanded applications to be realized.

[0026] According to a preferred development, the side protection double railing can be provided to extend along a longitudinal axis of the side protection double railing and to be mirror-symmetrical to a longitudinal central plane of symmetry of the side protection double railing extending perpendicular to the longitudinal axis of the side protection double railing. This allows for further reduction of manufacturing costs and enables easier storage, handling, and assembly of the side protection double railing.

[0027] According to a preferred embodiment, it can be provided that - either - the first upper strut attachment claw of the upper strut of the side protection double railing is open downwards in the first attachment direction, preferably towards the lower strut and / or perpendicular to one or the upper strut longitudinal axis of the upper strut and / or parallel to a vertical strut longitudinal axis of the first and / or second vertical strut of the first ladder, and the second upper strut attachment claw of the upper strut of the side protection double railing is open downwards in the second attachment direction, preferably towards the lower strut and / or perpendicular to the upper strut longitudinal axis of the upper strut and / or parallel to the vertical strut longitudinal axis of the first and / or second vertical strut of the second ladder - or - the first lower strut attachment claw of the lower strut of the side protection double railing is open downwards in the third attachment direction,Preferably, the second lower strut attachment claw of the lower strut of the side protection double railing is open downwards, preferably away from the upper strut and / or perpendicular to the longitudinal axis of the lower strut and / or parallel to the longitudinal axis of the vertical strut of the first and / or second vertical strut of the first ladder. The second lower strut attachment claw of the lower strut of the side protection double railing is open downwards in the fourth insertion direction, preferably away from the upper strut and / or perpendicular to the longitudinal axis of the lower strut and / or parallel to the longitudinal axis of the vertical strut of the first and / or second vertical strut of the second ladder. This allows the scaffold or the side protection double railing to be manufactured particularly simply and cost-effectively, as well as to be easily assembled and disassembled.

[0028] A further improvement in the sense of the above advantages can be achieved in that - either - the first attachment direction, in which the first upper strut suspension claw of the upper strut of the side protection double railing is open, and the second attachment direction, in which the second upper strut suspension claw of the upper strut of the side protection double railing is open, are the same or parallel to one another - or - the third attachment direction, in which the first lower strut suspension claw of the lower strut of the side protection double railing is open, and the fourth attachment direction, in which the second lower strut suspension claw of the lower strut of the side protection double railing is open, are the same or parallel to one another.

[0029] According to an alternative embodiment, it can be provided that - either - the first upper strut suspension claw of the upper strut of the side protection double railing is open in the first attachment direction towards the second upper strut end of the upper strut of the side protection double railing or towards the second upper strut suspension claw of the upper strut of the side protection double railing and the second upper strut suspension claw of the upper strut of the side protection double railing is open in the second attachment direction, preferably opposite, in particular parallel to the first attachment direction, towards the first upper strut end of the upper strut of the side protection double railing oris open towards the first upper strut suspension claw of the upper strut of the side protection double railing - or - the first lower strut suspension claw of the lower strut of the side protection double railing is open in the third attachment direction towards the second lower strut end of the lower strut of the side protection double railing or towards the second lower strut suspension claw of the lower strut of the side protection double railing and the second lower strut suspension claw of the lower strut of the side protection double railing is open in the fourth attachment direction, preferably opposite, in particular parallel to the third attachment direction, towards the first lower strut end of the lower strut of the side protection double railing or towards the first lower strut suspension claw of the lower strut of the side protection double railing.This allows for an additional safeguard against removal of the side protection double railing while still providing comparatively simple and at the same time particularly safe options for an advance installation of the side protection double railing, so that it can be achieved with even greater certainty that the side protection double railing cannot be removed without dismantling the first ladder or the second ladder.

[0030] According to an alternative embodiment, it can be provided that - either - the first attachment direction, in which the first upper strut suspension claw of the upper strut of the side protection double railing is open, and the second attachment direction, in which the second upper strut suspension claw of the upper strut of the side protection double railing is open, are different or enclose a fifth angle with each other, preferably amounting to 90 degrees - or - the third attachment direction, in which the first lower strut suspension claw of the lower strut of the side protection double railing is open, and the fourth attachment direction, in which the second lower strut suspension claw of the lower strut of the side protection double railing is open, are different or enclose a sixth angle with each other, preferably amounting to 90 degrees. This allows for expanded application and usage possibilities.

[0031] In this case, it can be provided that - either - the first upper strut suspension claw of the upper strut of the side protection double railing is open downwards in the first attachment direction, preferably towards the lower strut and / or perpendicular to one or the upper strut longitudinal axis of the upper strut and / or parallel to one or the vertical strut longitudinal axis of the first and / or second vertical strut of the first ladder, and the second upper strut suspension claw of the upper strut of the side protection double railing is open in the second attachment direction towards the first upper strut end of the upper strut of the side protection double railing ortowards the first upper strut suspension claw of the upper strut of the side protection double railing, preferably perpendicular to the first attachment direction - or - the first lower strut suspension claw of the lower strut of the side protection double railing is open downwards in the third attachment direction, preferably away from the upper strut and / or perpendicular to one or the lower strut longitudinal axis of the lower strut and / or parallel to one or the vertical strut longitudinal axis of the first and / or second vertical strut of the first ladder, and the second lower strut suspension claw of the lower strut of the side protection double railing is open in the fourth attachment direction towards the first lower strut end of the lower strut of the side protection double railing or towards the first lower strut suspension claw of the lower strut of the side protection double railing, preferably perpendicular to the third attachment direction.This allows for an additional safeguard against removal of the side protection double railing while still providing comparatively simple options for an advance installation of the side protection double railing, so that it can be achieved with even greater certainty that the side protection double railing cannot be removed without dismantling the first ladder or the second ladder.

[0032] It is understood that the aforementioned measures can be combined with each other as desired within the scope of feasibility, as long as these combinations fall within the scope of the invention, which is defined only by the appended claims.

[0033] Advantageous embodiments of the invention are described in more detail below with reference to the figures. Short description of the characters

[0034] They show: Fig. 1 shows a three-dimensional view of a mobile scaffold according to the invention, which is provided with pre-mounted side protection double railings; Fig. 2 shows a three-dimensional view of a side protection double railing; Fig. 3.1 shows the side protection double railing according to Figure 2 , in a two-dimensional plan view from the right; Fig. 3.2 the side protection double railing according to Figure 2 , in a two-dimensional view from above; Fig. 3.3 the side protection double railing according to Figure 2 , in a two-dimensional side view from the left; Fig. 3.4 an enlarged section in the area of Figure 3.2 section of the side protection double railing shown on the left; Fig. 4.1 one of the Figure 3.1 corresponding view of the side protection double railing, with components of the two ladders shown schematically; Fig. 4.2 one of the Figure 3.2corresponding view of the side protection double railing, with components of the two ladders shown schematically; Fig. 4.3 one of the Figure 3.3 . corresponding view of the side protection double railing, with a section of one of the two ladders shown schematically; Fig. 4.4 one of the Figure 4.4 corresponding view of the side protection double railing, with a section of one of the two ladders schematically drawn; Figs. 5 to 7 an assembly process for the assembly of the Figure 1shown mobile scaffolding, wherein Fig. 5 shows a first assembly situation during the advanced assembly of two double side protection railings starting from a lower level, wherein the two double side protection railings are in an inclined intermediate assembly position, in a three-dimensional representation; Fig. 6 shows a second assembly situation in which the two double side protection railings are each mounted in advance in a use position, in a three-dimensional representation; Fig. 7 shows a third assembly situation in which a further scaffold deck is mounted which limits the next higher level at the bottom, in which, due to the two double side protection railings mounted in advance, protection against persons falling from the further scaffold deck is realized before a fitter (not shown) climbs up to the said next higher level onto the said further scaffold deck. Detailed description of the characters

[0035] In Figure 1 1 shows an embodiment of a scaffold according to the invention, which is designed as a mobile scaffold 10 and which is provided with advanced-mounted side protection double railings 11 according to the invention. The mobile scaffold 10 is constructed from a plurality of vertical ladders 12.1, 12.2; 13.1, 13.2, which can also be referred to as support frames. Each ladder 12.1, 12.2; 13.1, 13.2 comprises two parallel vertical struts 14.1, 14.2, 15.1, 15.2 as well as horizontal rungs 16; 16.1, 16.4, 16.5, 16.6; 16.6.5, 16.6.6; 16.7; connecting these and arranged perpendicularly to the vertical struts 14.1, 14.2, 15.1, 15.2. 16.7.3, 16.7.4, 16.8; 16.8.1, 16.8.2 for the ascent and / or descent of persons and / or for the attachment of scaffold decks 17.1, 17.2, 17.3, diagonal connecting elements 18 and / or horizontal connecting elements 19 and side protection double railings 11.

[0036] In the illustrated embodiment, the mobile scaffold 10 is constructed with or on two chassis beams 21. These are each essentially formed from a horizontal support 22, each of which has a vertically standing insert tube 23 at each end when assembled. The respective insert tube 23 serves to accommodate a preferably height-adjustable foot 24. Each foot 24 comprises a holder 25, to which a conventional locking roller 26 is attached in the usual way. Vertical tubes 27 of a horizontal frame bar 31, also referred to as a base tube, are attached to the rear insert tubes 23 here. This component holds the two chassis beams 21 together in the area of ​​one of their ends. Below the horizontal support 22 of each chassis beam 21, an auxiliary rung 28 is attached to the respective chassis beam 21 by means of two vertical rung holders 29.One or more horizontal scaffolding decks can be placed on the auxiliary rungs 28 and / or fixed there, as shown in the example of the lowest scaffolding deck 17.1 in . Figure 1 shown, preferably with the aid of snap-in claws 30, can be or be releasably fastened.

[0037] The length of the frame bar 31 or the horizontal distance between its two vertical tubes 27 determines the width of the mobile scaffold 10 on its respective long side and / or the horizontal distance of the ladders 12.1, 12.2; 13.1, 13.2 or the suspension distance between two ladders 12.1, 12.2; 13.1, 13.2 of a level 20.1, 20.2, 20.3, which are supported on the respective chassis beam 21.

[0038] On each chassis beam 21 there is a lower or lowest, here short, ladder 12.1, 12.2 with its two parallel, short vertical struts 14.1, 14.2. Each short ladder 12.1, 12.2 has a number of rungs 16; 16.1 that is only half as large as the number of rungs 16 of the additional, long ladders 13.1, 13.2 placed on top of it. Each short ladder 12.1, 12.2 has four rungs 16. Each additional, long ladder 13.1, 13.2 placed on top of it has eight rungs 18. Accordingly, the structural height of the two lower or lowest, short ladders 12.1, 12.2 is only half as large as the structural height of the additional, long ladders 13.1, 13.2 placed on top of it. The height of the two lower, or lowest, short ladders 12.1, 12.2 is 100 cm in the illustrated example. The height of the additional, long ladders 13.1, 13.2 placed on top of them is 200 cm in the illustrated example. The two lower, or lowest, short ladders 12.1, 12.2 are assigned to a lowest, orfirst floor 20.1.

[0039] The horizontal rungs 16 of each ladder 12.1, 12.2; 13.1, 13.2 are arranged at equal vertical rung spacings 33 from one another. Within each ladder 12.1, 12.2; 13.1, 13.2, the vertical spacing 33 of the rungs 16 is 25 cm. However, it is understood that within a ladder, different vertical spacings between the rungs can also be provided. This is particularly true if the rungs are not intended or used for persons to ascend and / or descend. One or more rungs, or possibly all rungs, can also be slanted or have slanted rung sections.

[0040] The overall width of the ladders 12.1, 12.2; 13.1, 13.2 of the mobile scaffold 10, or the horizontal spacing of the vertical strut longitudinal axes of the respective two vertical struts 14.1, 14.2; 15.1, 15.2 of the respective ladders 12.1, 12.2; 13.1, 13.2, is 75 cm in the illustrated embodiment. However, it is understood that the overall width of the ladders or the horizontal spacing of their vertical struts per ladder can also be smaller or larger.

[0041] A further vertical long ladder 13.1, 13.2 with its long vertical struts 15.1, 15.2 is attached to each of the lower or lowest short ladders 12.1, 12.2 standing or mounted on the travel beams 21, or to the upper vertical strut ends of their short vertical struts 14.1, 14.2. This is done in such a way that the vertical plane spanned by these further long ladders 13.1, 13.2 coincide with the respective vertical plane spanned by the lower or lowest short ladders 12.1, 12.2 arranged below and supporting them. Consequently, the additional long ladders 13.1, 13.2 of the now second level 20.2 also have the same horizontal distance 34 between them as the two short ladders 12.1, 12.2 of the lowest or first level 20.1. All additional long ladders 13.1, 13.2 are of the same length in the embodiment shown.All offer the same installation height. The latter is 200 cm in this case. However, it is understood that the length or installation height can also be smaller or larger, and / or that the length or installation height of additional ladders or support frames can also vary.

[0042] On the fourth rung 16.4, viewed from below, of each attached long ladder 13.1, 13.2, a further horizontal scaffold deck 17.1, 17.2 is releasably attached, preferably by means of snap-in claws 30.

[0043] In the mobile scaffold 10 according to the illustrated embodiment, the first scaffold deck 17.1 of the first level 20.1 and the second scaffold deck 17.2 of the next higher or second level 20.2 are arranged at a first vertical scaffold deck spacing from each other. This distance is 212.5 cm here. In contrast, the second scaffold deck 17.2 of the second level 20.2 and the third scaffold deck 17.3 of the third level 20.3, which is arranged above it and is the next higher level, are arranged at a second vertical scaffold deck spacing. This second scaffold deck spacing is also maintained for any additional, next higher scaffold decks.

[0044] Preferably, all scaffolding decks 17.1, 17.2, 17.3, at least the scaffolding decks 17.2, 17.3 of the second level 20.2 and each subsequent level 20.3 in the upward direction, are releasably attached to rungs 16 of the ladders 12.1, 12.2; 13.1, 13.2 by means of snap-in claws 30. Each scaffolding deck 17.1, 17.2, 17.3 is attached to two associated rungs 16, which, with respect to the respective scaffolding deck 17.1, 17.2, 17.3, are arranged at a rung of the respective ladder 12.1, 12.2; 13.1, 13.2 having approximately the same rung height. The same generally applies to the lowest or first scaffolding deck 17.1. However, this can also be placed only on the auxiliary rungs 28 or only on the rungs 16 of the lowest ladders 12.1, 12.2, and can therefore also be designed as a scaffolding plank, for example a wooden plank.

[0045] In the illustrated embodiment, the mobile scaffold 10 is constructed with a total of three levels 20.1, 20.2, 20.3, each with three layers or levels, each formed by a scaffold deck 17.1, 17.2, 17.3. The lowest or first level 20.1 is defined by the lowest or first scaffold deck 17.1, by the two associated short ladders 12.1, 12.2, and by parts of the long ladders 13.1, 13.2 mounted on the short ladders 12.1, 12.2. The next higher or second level 20.2 is limited by the next higher or second scaffold deck 17.2, by the two associated long ladders 13.1, 13.2 and by parts of the two further long ladders 13.1, 13.2 placed on top of the two long ladders 13.1, 13.2. The latter limit also the third, here top floor 20.3, which is limited at the bottom 64 by the third scaffolding floor 17.3.

[0046] To stiffen the mobile scaffold 10, two diagonal braces 18 are mounted on each level 20.1, 20.2, and 20.3. These are arranged crosswise or crosswise on each level 20.1, 20.2, and 20.3. All diagonal braces 18 have locking claws 30 at both ends. On the lowest or first level 20.1, the respective diagonal brace 18 is releasably attached to a bottom rung 16.1 of the lowest short ladder 12.1, 12.2 and to the fourth rung 16.4 (viewed from below) of the opposite long ladder 13.1, 13.2, which is placed on top of the other short ladder 12.1. Two diagonal braces 18 are also mounted on the second level 20.2. Each of these diagonals 18 is connected to a fifth rung 16.5, viewed from below, of the associated, further, long ladders 13.1, 13.2 and to a fourth rung 16.4, viewed from below, of the associated, opposite, further, long ladders 13.1, 13.2, which is mounted on the long ladder 13.1, 13.2 located below. This provides sufficient bracing for the mobile scaffold 10 against tipping and / or twisting.

[0047] The Figure 1 The mobile scaffold 10 shown is similar in its construction, with the exception of the side protection double railings 11, to the mobile scaffold shown in Figure 37 of EP 2 175 087 A1 and described in the associated figure description. Figure 1 The mobile scaffold 10 shown can be constructed or assembled in a similar manner as illustrated in Figures 25 to 37 of EP 2 175 087 A1 and described in the associated figure description. In contrast to the railing elements shown and described in EP 2 175 087 A1, which are individual rod elements with straight struts, the mobile scaffold 10 according to the invention, for example according to Figure 1, special side protection double railings 11 are used. These side protection double railings 11 can be mounted in a similar manner as shown and described in EP 2 175 087 A1 with regard to the rod-shaped railing elements used there. In the present Figures 1 In the exemplary embodiment of the mobile scaffold 10 shown in Figures 1 and 5 to 7, the advance assembly of the double side protection railings 11 is carried out using ladder suspension devices 32, which are designed and usable similarly to the support frame suspension devices shown in Figures 47 to 49 of EP 2 175 087 A1 and described in the associated figure description. The functions of the ladder suspension devices 32 shown in Figures 1 and 5 to 7 correspond to the functions of the aforementioned support frame suspension devices.

[0048] It is understood that a mobile scaffold 10 according to the invention, with regard to its construction, with the exception of the side protection double railings 11, can also be similar, for example, to the mobile scaffold shown in Figure 14 of EP 2 175 087 A1 and described in the associated figure description, and can also be constructed or assembled in a similar manner as illustrated in Figures 1 to 14 of EP 2 175 087 A1 and described in the associated figure description. Accordingly, in contrast to the mobile scaffold 10 according to the Figures 1and 5 to 7 of the patent in question, a long ladder can also be installed as the lowest ladder in each case - instead of the respective short ladder. It is further understood that a mobile scaffold according to the invention, with the exception of the double side guard rails 11, can also be similar in structure to the mobile scaffold shown in Figure 51 of EP 2 175 087 A1 and described in the associated figure description.

[0049] The invention relates to a scaffold, in particular a mobile scaffold 10, which is constructed with at least two vertical ladders 13.1, 13.2, with at least one horizontal scaffold deck 17.1, 17.3, and with at least one side protection railing 11 for protecting persons from falling from the scaffold deck 17.1, 17.2. Each ladder 13.1, 13.2 of the at least two ladders 13.1, 13.2 has at least two parallel vertical struts 15.1, 15.2 and several, preferably parallel, rungs 16. The rungs 16 each extend between a first vertical strut 15.1 and a second vertical strut 15.2 of the at least two vertical struts 15.1, 15.2 of the respective ladder 13.1, 13.2 at rung vertical spacings 33 from one another. Preferably, the rung vertical spacings 33 are each the same. The rungs 16 are each firmly, preferably rigidly, connected to the first vertical strut 15.1 and the second vertical strut 15.2 of the respective ladders 13.1, 13.2.A vertical first ladder 15.1 and a vertical second ladder 15.2 of the at least two ladders 15.1, 15.2 are positioned vertically, substantially parallel to one another, at a ladder horizontal distance 34. The at least one scaffold deck 17.2, 17.3 extends between the first ladder 15.1 and the second ladder 15.2 and is releasably attached to both the first ladder 15.1 and the second ladder 15.2. At least one side protection double railing 11, which can be mounted in advance or is mounted in advance, is releasably attached to the first ladder 15.1 and the second ladder 15.2. Preferably, two, preferably identically designed, side protection double railings 11 are releasably attached to each ladder 15.1, 15.2 at a horizontal side protection double railing distance from one another (see . Figure 1 ).

[0050] Each side protection double railing 11 extends between a first ladder 13.1 and a second ladder 13.2. The or each side protection double railing 11 has an upper strut 35, a lower strut 36 and several connecting struts, preferably one or more cross struts 37.1, 37.2, 37.3 and / or one or more diagonal struts, which are each firmly, preferably rigidly, connected to the lower strut 36 and to the upper strut 35. In the fully assembled mobile scaffold 10, the upper strut 35 of the or each side protection double railing 11 extends above the at least one horizontally arranged scaffold deck 17.2, 17.3 and the lower strut 36 extends at least partially or substantially or, as in Figure 1shown, completely above the at least one scaffold deck 17.2, 17.3. In the illustrated embodiment, three parallel cross braces 37.1, 37.2, 37.3 are provided as connecting braces, which are arranged at equal distances from one another. The three cross braces 37.1, 37.2, 37.3 each extend between the upper brace 35 and a lower brace center section 38 of the lower brace 36 of the side protection double railing 11, each perpendicular to the upper brace longitudinal axis 39 of the upper brace 35 and each perpendicular to the lower brace center section longitudinal axis 40 of the lower brace center section 38 of the lower brace 36.

[0051] The upper strut 35 of the or each side protection double railing 11 has a first upper strut end 41.1 with a first upper strut suspension unit 42.1 with a first upper strut suspension claw 43.1, preferably having a U-shaped, semicircular, or J-shaped cross-section. The first upper strut suspension claw 43.1 has first upper strut suspension claw sides 44.1, 44.2 facing away from each other, preferably in opposite directions, and is open toward its first upper strut suspension claw sides 44.1, 44.2 and downwards 64 in a first insertion direction 45.1, or toward the lower strut 36. The upper strut 35 is releasably fastened to a first, here uppermost, rung 16.8.1 of the rungs 16 of the first ladder 13.1 by means of its first upper strut suspension claw 43.1, in a vertical first pivoting plane relative to the first ladder 13.1.

[0052] The upper strut 35 of the or each side protection double railing 11 has a second upper strut end 41.2 extending away from the first upper strut end 41.1, preferably in an opposite direction, with a second upper strut suspension unit 42.2 with a second upper strut suspension claw 43.2, preferably having a U-shaped, semicircular, or J-shaped cross-section. The second upper strut suspension claw 43.2 has second upper strut suspension claw sides 46.1, 46.2 facing away from each other, preferably in opposite directions, and is open toward its second upper strut suspension claw sides 46.1, 46.2 and downwards 64 or toward the lower strut 36 in a second attachment direction 45.2 parallel to the first attachment direction 45.1. The upper strut 35 is attached to a second, here uppermost, rung 16.8.2 of the rungs 16 of the second ladder 13 by means of the second upper strut attachment claw 43.2.2, pivotable in a vertical second pivot plane relative to the second ladder 13.2, and releasably attached. The first upper strut suspension unit 42.1 and the second upper strut suspension unit 42.2 are of identical design.

[0053] The top strut 35 of the or each side protection double railing 11 has a top strut length 48 which is greater than a first rung horizontal distance 49.1 which the first rung 16.8.1 of the first ladder 13.1 and the second or uppermost rung 16.8.2 of the second ladder 13.2, which is arranged at a substantially identical first height as the first or uppermost rung 16.8.1 of the first ladder 13.1, have from one another. The upper strut 35 of the or each side protection double railing 11 overlaps the first or uppermost rung 16.8.1 of the first ladder 13.1 at least in the region of its first upper strut end 41.1, which is arranged directly above the first, uppermost rung 16.8.1 of the first ladder 13.1, and overlaps the second or uppermost rung 16.8.2 of the second ladder at least in the region of its second upper strut end 41.2, which is arranged directly above the second or uppermost rung 16.8.2 of the second ladder 13.2.

[0054] The lower strut 36 of the or each side protection double railing 11 has a lower strut length 50 which is greater than a second rung horizontal distance 49.2 corresponding to the first rung horizontal distance 49.1, which is between a third rung 16.7.3 of the rungs 16 of the first ladder 13.1 and a fourth rung 16.7.4 of the rungs 16 of the second ladder 13.2 arranged at a substantially identical second height as the third rung 16.7.3 of the first ladder 13.1.

[0055] The third rung 16.7.3 of the first ladder 13.1 is arranged at a first rung vertical spacing 33 below the first or uppermost rung 16.8.1 of the first ladder 13.1, preferably next to the first or uppermost rung 16.8.1 in downward direction 64. The fourth rung 16.7.4 of the second ladder 13.2 is arranged at a second rung vertical spacing 33, preferably corresponding to the first rung vertical spacing 33, below the second rung 16.8.2 of the second ladder 13.2, preferably next to the second rung 16.8.2 in downward direction 64. In other words, the third rung 16.7.3 of the first ladder 13.1 is preferably the next rung 16 of the first ladder 13.1 following the first or uppermost rung 16.8.1 of the first ladder 13.1, and the fourth rung 16.7.4 of the second ladder 13.2 is preferably the next rung 16 of the second ladder 13 following the second or uppermost rung 16.8.2 of the second ladder 13.2 down 64 next rung 16 of the second ladder 13.2.

[0056] The lower strut 36 of the or each side protection double railing 11 has a first lower strut end 51.1 and a second lower strut end 51.2 extending away therefrom, preferably in an opposite direction. The lower strut 36 of the or each side protection double railing 11 engages under the third rung 16.7.3 of the first ladder 13.1 at least in the region of its first lower strut end 51.1, which is arranged directly below the third rung 16.7.3 of the first ladder 13.1, and engages under the fourth rung 16.7.4 of the second ladder 13.2 at least in the region of its second lower strut end 51.2, which is arranged directly below the fourth rung 16.7.4 of the second ladder 13.2.

[0057] According to the invention, the upper strut 36 of the side protection double railing 11 at least in the region of its first upper strut end 41.1 and at least in the region of its second upper strut end 41.2 as well as the lower strut 36 of the side protection double railing 11 at least in the region of its first lower strut end 51.1 and at least in the region of its second lower strut end 51.2 and the first rung 16.8.1 and the third rung 16.7.3 of the first ladder 13.1 as well as the second rung 16.8.2 and the fourth rung 16.7.4 of the second ladder 13.2 are designed and arranged in such a way that the side protection double railing 11 cannot be dismantled without dismantling the first ladder 13.1 or the second ladder 13.2.

[0058] At least in the area of ​​the first upper strut end 41.1 and at least in the area of ​​its first lower strut end 51.1, the upper strut 35 and the lower strut 36 of the side protection double railing 11 have a first strut vertical distance 52.1 from each other, which is only slightly greater than the first rung vertical distance 33. The upper strut 35 of the side protection double railing 11 has, at least in the area of ​​its second upper strut end 41.2, and the lower strut 36 of the side protection double railing 11 has, in the area of ​​its second lower strut end 51.2, a second strut vertical distance 52.2 from each other, which is only slightly greater than the second rung vertical distance 33. Particularly preferably, the first strut vertical distance 52.1 is designed to match the first rung vertical distance 33 in such a way that the first upper strut suspension claw 43.1 at most as far from the first rung 16.8.1 of the first ladder 13.1 can be lifted upwards 63 such that the first upper strut suspension claw 43.1 cannot be removed from the first rung 16.8.1 of the first ladder 13.1. In addition, the second strut vertical distance 52.2 is designed to match the second rung vertical distance 33 such that the second upper strut suspension claw 43.2 can at most be lifted upwards 63 so far from the second rung 16.8.2 of the second ladder 13.2 that the second upper strut suspension claw 43.2 cannot be removed from the second rung 16.8.2 of the second ladder 13.2.

[0059] The first lower strut end 51.1 of the lower strut 36 extends in a first space 53.1, which is delimited by two immediately successive rungs 16, namely here the third rung 16.7.3 of the first ladder 13.1 and the rung 16.6.5 of the first ladder 13.1 following downwards 64, and by the associated two vertical struts 15.1, 15.2 of the first ladder 13.1, and the second lower strut end 51.2 of the lower strut 36 extends in a second space 53.2, which is delimited by two immediately successive rungs 16, namely here the fourth rung 16.7.4 of the second ladder 13.2 and the rung 16.6.6 of the second ladder 13.2 following downwards 64, and by the associated two vertical struts 15.1, 15.2 of the second conductor 13.2 is limited.

[0060] The lower strut 36 has, between its two lower strut ends 51.1, 51.2, the lower strut center section 38 containing a lower strut center 54 of the lower strut 36. The lower strut center section 38 has lower strut center section ends 55.1, 55.2 pointing away from each other in opposite directions. From each lower strut middle section end 55.1, 55.2, a lower strut part 56.1, 56.2 of the lower strut 36 is bent in a first transverse direction 62.1 toward the upper strut 35 and in a second transverse direction 62.2 away from the respective upper strut end 41.1, 41.2 of the upper strut 35 or toward the respective associated vertical strut 15.1 or 15.2 of the first and second ladders 13.1, 13.2. In the region of its two lower strut ends 51.1, 51.2, the lower strut 36 has a lower strut end section 57.1, 57.2, each of which is bent in three directions from the lower strut middle section 38.

[0061] The top strut 35 of the or each side protection double railing 11 extends essentially rectilinearly along its top strut longitudinal axis 39. The top strut 35 has a preferably tubular, rectilinearly extending top strut bar element 58, which is connected to the first top strut suspension unit 42.1 or to which the first top strut suspension unit 42.1 is fastened. The top strut bar element 58 has a first top strut bar element end 59.1 and a second top strut bar element end 59.2 extending away from it in an opposite direction and along the top strut longitudinal axis 39 of the top strut 35, which is connected to the second top strut suspension unit 42.2 or to which the second top strut suspension unit 42.2 is fastened.

[0062] The lower strut middle section 38 extends rectilinearly along its lower strut middle section longitudinal axis 40 parallel to the upper strut longitudinal axis 39 of the upper strut 35. The upper strut longitudinal axis 39 extends in an imaginary first plane 60.1 containing the lower strut middle section longitudinal axis 40 of the lower strut middle section 38. In the properly installed state of the or each side protection double railing 11, the or each respective first plane is a first vertical plane 60.1.

[0063] Each lower strut end part 57.1, 57.2 of the lower strut 36 of the respective side protection double railing 11 extends rectilinearly along a respective lower strut end part longitudinal axis 61.1, 61.2. Each lower strut end part longitudinal axis 61.1, 61.2 extends parallel to the lower strut middle part longitudinal axis 40 of the lower strut middle part 39. Each lower strut end part 57.1, 57.2 or its respective lower strut end part longitudinal axis 61.1, 61.2 is arranged offset upwards 63 from the lower strut middle part longitudinal axis 40 and towards a first side, in particular towards a front side or outer side 65 of the respective side protection double railing 11 or outwards 66. Each sub-strut end part 57.1, 57.2 is arranged in a fifth transverse direction 62.5 towards the directly associated vertical strut 15.1, 15.2 of the associated ladder 13.1, 13.2 or outwards 66 laterally offset from the sub-strut middle part 38.

[0064] Particularly preferably, the first sub-strut end 51.1 of the sub-strut 36 has a first sub-strut fastening unit 70.1 with a first sub-strut claw 71.1, preferably having a U-shaped or semicircular or J-shaped cross-section, for receiving the first or second vertical strut 15.1, 15.2 of the first ladder 13.1 and with a first locking element 72.1 for locking the first sub-strut claw 71.1 with an associated vertical strut 15.1, 15.2 of the first ladder 13.1, 13.2. The second sub-strut end 51.2 of the sub-strut 36 has a second sub-strut fastening unit 70.2 with a second sub-strut claw 71.2, preferably having a U-shaped, semicircular, or J-shaped cross-section, for receiving the first or second vertical strut 15.1, 15.2 of the second ladder 13.2 and with a second locking element 72.2 for locking the second sub-strut claw 71.2 to an associated vertical strut 15.1, 15.2 of the second ladder 13.2.

[0065] The first lower strut claw 71.1 has first lower strut claw sides 71.1.1, 71.1.2 pointing away from each other in opposite directions and is open toward its first lower strut claw sides 71.1.1, 71.1.2 and in a fifth attachment direction 45.5 toward the outer side 65 of the side protection double railing 11. The second lower strut claw 71.2 has second lower strut claw sides 71.2.1, 71.2.2 pointing away from each other in opposite directions and is open toward its second lower strut claw sides 71.2.1, 71.2.2 and in a sixth attachment direction 45.6 parallel to the fifth attachment direction 45.5 toward the same outer side 65 of the side protection double railing 11.

[0066] The first locking element 72.1 is transferable, preferably against the spring force of a first spring (not shown), in particular when plugged onto the associated vertical strut 15.1, 15.2, automatically or by manual actuation, into a first opening position (not shown), in which the first lower strut claw 71.1 can be plugged onto the associated vertical strut 15.1, 15.2 of the first ladder 13.1 in the fifth plugging direction 45.5 or in which the first lower strut claw 71.1 can be removed from the associated vertical strut 15.1, 15.2 of the first ladder 13.1 and from the first opening position (not shown), preferably due to a spring restoring force of the spring (not shown) or due to manual actuation or due to gravity, into a first locking position 76.1, in which the first lower strut claw 71.1 is connected to the associated vertical strut 15.1, 15.2 against removal from the associated vertical strut 15.1, 15.2 can be positively locked.

[0067] The first lower strut claw 71.1 is releasably fastened to the associated vertical strut 15.1, 15.2 of the first ladder 13.1 by means of the first locking element 72.1 located in its first locking position 76.1 and is positively locked to the associated vertical strut 15.1, 15.2 to prevent it from being removed. The second locking element 72.2 can be transferred, preferably against the spring force of a second spring (not shown), in particular when plugged onto the associated vertical strut 15.1, 15.2 automatically, or by manual actuation, into a second opening position (not shown), in which the second lower strut claw 71.2 can be plugged in the sixth plugging direction 45.6 onto the associated vertical strut 15.1, 15.2 of the second ladder 13.2 or in which the second lower strut claw 71.2 can be detached from the associated vertical strut 15.1, 15.2 of the second ladder 13.2 is removable and can be transferred from the second opening position (not shown), preferably due to a spring restoring force of the second spring (not shown), or by manual actuation or due to gravity, into a second locking position 76.2, in which the second lower strut claw 71.2 can be positively locked to the associated vertical strut 15.1, 15.2 to prevent removal from the associated vertical strut 15.1, 15.2. The second lower strut claw 71.2 is releasably fastened to the associated vertical strut 15.1, 15.2 of the second ladder 13.2 by means of the second locking element 72.2 located in its second locking position 76.2 and is positively locked to the associated vertical strut 15.1, 15.2 to prevent removal from the associated vertical strut 15.1, 15.2.

[0068] According to the invention, the first lower strut claw 71.1 of the first lower strut fastening unit 70.1 is open in the fifth plug-on direction 45.5 perpendicular to the first plug-on direction 45.1, in which the first upper strut suspension claw 43.1 of the first upper strut suspension unit 42.1 is open downwards 64 or towards the lower strut 36, and the second lower strut claw 71.2 of the second lower strut fastening unit 70.2 is open in the sixth plug-on direction 45.6 perpendicular to the second plug-on direction 45.2, in which the second upper strut suspension claw 43.2 of the second upper strut suspension unit 42.2 is open downwards 64 or towards the lower strut 36. In other words, the first lower strut claw 71.1, which is open in the fifth attachment direction 45.5, is at a first angle 77 relative to the first upper strut suspension claw 43.1, which is open downwards 64 in the first attachment direction 45.1 or towards the lower strut 36.1 is arranged rotated by 90 degrees around the upper strut longitudinal axis 39 of the upper strut 35 and the second lower strut claw which is open in the sixth attachment direction 45.6 is arranged rotated at a second angle of 90 degrees around the upper strut longitudinal axis 39 of the upper strut 35 relative to the second upper strut suspension claw 43.2 which is open downwards 64 in the second attachment direction 45.2 or towards the lower strut 36.

[0069] The first lower strut fastening unit 70.1 and the second lower strut fastening unit 70.2 are designed identically. Preferably, the first and second lower strut fastening units 70.1, 70.2 of the lower strut 36 are each a known locking claw, preferably as disclosed, illustrated, and described in DE 38 22 215 A1 and the parallel EP 0 348 885 A2.

[0070] In the embodiment shown in the figures, the first and second upper strut suspension units 42.1, 42.2 of the upper strut 35 each comprise a simple suspension claw 43.1; 43.2 known per se. These suspension claws 43.1, 43.2 therefore each have no locking means for locking to a strut or rung to which the respective suspension claw 43.1, 43.2 can be releasably suspended or is suspended.

[0071] Preferably, the upper strut length 48 of the upper strut 35 is the same as the lower strut length 50 of the lower strut 36.

[0072] According to an embodiment not shown in the figures, the first upper strut suspension unit or the first upper strut end of the upper strut can have, in addition to the respective upper strut suspension claw, a fifth locking element for locking the first upper strut suspension claw to the first rung of the first ladder, and the second upper strut suspension unit or the second upper strut end of the upper strut can have a sixth locking element for locking the second upper strut suspension claw to the second rung of the second ladder.The fifth locking element and the sixth locking element can each be transferred, preferably against the spring force of a spring, in particular when plugged onto the respective rung automatically, or by manual actuation, into an open position in which the respective upper strut suspension claw can be plugged onto the respectively assigned rung of the respective ladder in the respective plugging direction, and from the open position, preferably due to a spring restoring force of the spring or by manual actuation or due to gravity, into a locked position in which the respective upper strut suspension claw is locked to the respectively assigned rung against removal from the respective rung.In this case, the first and second upper strut suspension units of the lower strut are preferably each an upper strut fastening unit, preferably each in the form of a known locking claw, for example as shown and described in DE 38 22 215 A1 and in the parallel EP 0 348 885 A2. In this case, it can preferably be provided that the first lower strut fastening unit, the second lower strut fastening unit, the first upper strut suspension unit, and the second upper strut suspension unit are each designed identically.

[0073] The method for assembling the scaffold according to the invention, for example the mobile scaffold 10 shown in the figures, differs from the alternative assembly methods dealt with in EP 2 175 087 A1 essentially in that, instead of the individual, straight railing elements, the respective side protection double railing 11 is mounted in a correspondingly advanced manner.

[0074] According to a preferred variant of the assembly method in conjunction with a particularly preferred embodiment of the side protection double railing 11, in which the respective lower strut fastening unit 70.1, 70.2 is provided with a locking element for locking the respective lower strut claw 71.1, 71.2 of the respective lower strut fastening unit 70.1, 70.2 with the respectively associated vertical strut 15.1, 15.2 of the respectively associated ladder 13.1, 13.2 against an unintentional lifting or removal of the lower strut 36 from the respectively associated ladder 13.1, 13.2, it can be provided that after the respective side protection double railing 11 has been mounted in advance from a lower level or floor 20.1 or 20.2 and after, preferably subsequently, at least one scaffold deck 17.2, 17.3 in a next higher level or floor 20.2 or 20.3 at a vertical distance of preferably about 100 cm below thethe respective upper strut 35 of the respective side protection double railing 11, the first and second lower strut fastening units 70.1, 70.2 of the lower strut 36 are connected to the associated vertical strut 15.1, 15.2 of the respectively associated ladder 13.1, 13.2 in such a way that the first and second lower strut claws 71.1, 71.2 of the first and second lower strut fastening units 70.1, 70.2 and therefore the lower strut 36 are positively locked to the associated vertical struts 15.1, 15.2 of the respectively associated ladders 13.1, 13.2 and therefore to these ladders 13.1, 13.2. This allows the scaffolding or mobile scaffold 10 to be assembled and disassembled easily and safely, and the scaffolding or mobile scaffold 10 assembled in this way has greater stability and offers greater safety against persons becoming trapped or falling than with state-of-the-art designs.

[0075] In the illustrated embodiment, the mobile scaffold 10 is constructed based on a structural unit with at least four ladders 12.1, 12.2, 13.1, 13.2 or 13.1, 13.2, 13.1, 13.2. Of these four ladders 12.1, 12.2, 13.1, 13.2 or 13.1, 13.2, 13.1, 13.2, two ladders 12.1, 12.2 or 13.1, 13.2 are assigned to a lower or lowest level 20.1 or 20.2, respectively, while the other two ladders 13.1, 13.2 are assigned to the next higher level 20.2 or 20.3, respectively. In this case, two of the ladders 12.1, 12.2, 13.1, 13.2 or 13.1, 13.2, 13.1, 13.2 are constructed one above the other, preferably stacked on top of the other. However, it is understood that a mobile scaffold according to the invention can also be constructed based on structural units with only three ladders, or possibly even with only two ladders. In a structural unit consisting of three ladders,Two of these ladders are stacked on top of each other, preferably stacked on top of each other, while the third ladder is or is positioned at a horizontal ladder distance from the other two. In a construction unit consisting of only two ladders, these ladders are or are positioned at a horizontal ladder distance from each other.

[0076] At least the second and each subsequent level 20.2, 20.3 of the mobile scaffold 10 is / are secured, towards their respective long sides or outer sides 73.1, 73.2 of the mobile scaffold 10, with two side protection double railings 11 each in such a way that a person standing on the scaffold deck 17.1, 17.3 to be secured or on the scaffold decks 17.1, 17.3 to be secured of these levels 20.2, 20.3 is protected from falling. The respective top strut 35 of the respective side protection double railing 11 forms a hip or back protection railing or a handrail.

[0077] The side protection double railings 11 of the respective levels 20.2, 20.3, or levels of the mobile scaffold 10 are arranged laterally next to one another at a horizontal side protection double railing spacing 74 at essentially the same height. Preferably, all side protection double railings 11 are of the same design.

[0078] The or each side protection double railing 11 extends along a side protection double railing longitudinal axis 46 of the side protection double railing 11. The or each side protection double railing 11 is designed mirror-symmetrically to a side protection double railing longitudinal central symmetry plane 47. Preferably, the side protection double railing longitudinal central symmetry plane (47) is formed perpendicular to the side protection double railing longitudinal axis 46 and / or perpendicular to the upper strut longitudinal axis 30 and / or perpendicular to the lower strut central part longitudinal axis 40 and can contain the lower strut center 54.

[0079] At least in the topmost level 20.3 or level of the mobile scaffold 10, additional securing means, here in the form of toeboards 78.1, 78.2, are preferably provided. These are arranged vertically directly adjacent to the topmost scaffold deck 17.3 provided there and extend between adjacent vertical struts 15.1, 15.2 of the ladders 13.1, 13.2 delimiting the topmost level 20.3 or level. In the illustrated embodiment, two directly adjacent or adjacent / abutting toeboards 78.1, 78.2 are arranged perpendicular to each other.

[0080] The invention is not limited to the advantageous embodiments shown in the figures. The embodiments described above can also be implemented differently than in the exemplary figures. The reference numerals used in the description of the figures and in the subsequent claims do not limit the scope of the invention. The claws mentioned in this patent can also be referred to as hooks. List of reference symbols

[0081] 10Scaffolding / Mobile tower 11Side protection railing / Side protection double railing 12.1(short) ladder (on first floor) 12.2(short) ladder (on first floor) 13.1(long) ladder (on second and third floor) 13.2(long) ladder) (on second and third floor) 14.1(short) vertical brace 14.2(short) vertical brace 15.1(long) vertical brace 15.2(long) vertical brace 16Rung 16.1Rung (lowest rung or first rung from the bottom) 16.4Rung (fourth rung from the bottom) 16.5Rung (fifth rung from the bottom) 16.6Rung (sixth rung from the bottom) 16.6.5Rung (of the first ladder) 16.6.6Rung (of the second ladder) 16.7Rung (seventh rung from the bottom) 16.7.3Third rung (of the first ladder) 16.7.4Fourth rung (of the second ladder) 16.8Rung (top rung or eighth rung from the bottom) 16.8.1First (top) rung (of the first ladder) 16.8.2Second (top) rung of the second ladder) 17.1(first) scaffold deck (of the first level) 17.2 (second) scaffold deck (of the second level) with access hatch and hinged lid 17.3 (third) scaffold deck (of the third level) with access hatch and hinged lid 18 Diagonal connecting element / diagonal 19 Horizontal connecting element 20.1 (first) level 20.2 (second) level 20.3 (third) level 21 Mobile beam 22 Horizontal support (of 21) 23 Insert tube 24 Foot 25 Bracket 26 Locking roller 27 Vertical tube 28 Auxiliary rung 29 Rung holder 30 Locking claw 31 Frame rod / base tube 32 Ladder suspension device 33 Vertical rung spacing (between every two rungs) 34 Horizontal rung spacing (between two horizontally adjacent ladders) 35 Top brace 36 Bottom brace 37.1 Connecting strut / cross strut 37.2 Connecting strut / cross strut 37.3 Connecting strut / cross strut 38 Lower strut middle section 39 Upper strut longitudinal axis 40 Lower strut middle section longitudinal axis 41.1 (first) upper strut end 41.2 (second) upper strut end 42.1 (first) upper strut suspension unit 42.2 (second) upper strut suspension unit 43.1(first) (top strut) attachment claw 43.2(second) (top strut) attachment claw 44.1.1(first) top strut attachment claw side (of 43.1) 44.1.2(second) top strut attachment claw side (of 43.1) 44.2.1(first) top strut attachment claw side (of 43.2) 44.2.2(second) top strut attachment claw side (of 43.2) 45.1(first) attachment direction 45.2(second) attachment direction 45.5(fifth) attachment direction 45.6(sixth) attachment direction 46Side protection double railing longitudinal axis 47Side protection double railing longitudinal central symmetry plane 48Upper brace length 49.1(first) rung horizontal distance 49.2(second) rung horizontal distance 50Lower brace length 51.1(first) lower brace end 51.2(second) lower brace end 52.1(first) brace vertical distance (from 41.1 to 51.1) 52.2(second) brace vertical distance (from 41.2 to 51.2) 53.1(first) space 53.2(second) space 54Lower brace center 55.1(first) lower brace middle section end 55.2(second) lower brace middle section end 56.1(first) lower strut part 56.2(second) lower strut part 57.1(first) lower strut end part 57.2(second) lower strut end part 58upper strut bar element 59.1(first) upper strut bar element end 59.2(second) upper strut bar element end 60.1(first) plane / (first) vertical plane (. Fig. 3.3) 61.1 (first) lower strut end part longitudinal axis 61.2 (second) lower strut end part longitudinal axis 62.1 (first) transverse direction 62.2 (second) transverse direction 62.5 (fifth) transverse direction 63 upwards 64 downwards 65 front / outside of 11 66 outwards 70.1 (first) lower strut fastening unit 70.2 (second) lower strut fastening unit 71.1 (first) lower strut claw 71.1.1 (first) lower strut claw side (of 71.1) 71.1.2 (second) lower strut claw side (of 71.1) 71.2 (second) lower strut claw 71.2.1 (first) lower strut claw side (of 71.2) 71.2.2(second) lower strut claw side (of 71.2) 72.1(first) locking element / (first) pawl 72.2(second) locking element / (second) pawl 73.1(first) long side / outside (of 10) 73.2(second) long side / outside (of 10) 74(horizontal) side protection double railing distance (of 11-11) 76.1(first) locking position of 72.1 ( Fig. 4.2 + 4.4 ) 76.2(second) locking position of 72.2 ( Fig. 4.2) 77.1(first) angle (90 degrees) 78.1Toe board (short) 78.2Toe board (long)

Claims

1. Scaffold, particularly mobile scaffold (10), constructed with at least two vertical ladders (13.1, 13.2), at least one horizontal scaffolding floor (17.2, 17.3) and at least one side protection railing (11) for protection of persons from falling down from the scaffolding floor (17.2, 17.3), wherein each ladder (13.1, 13.2) of the at least two ladders (13.1, 13.2) comprises at least two parallel struts (15.1, 15.2) and a plurality of rungs (16) which each extend between a first vertical strut (15.1) and a second vertical strut (15.2) of the at least two vertical struts (15.1, 15.2) of the respective ladder (13.1, 13.2) at vertical rung spacings (33) from one another and which are each fixedly connected with the first vertical strut (15.1) and the second vertical strut (15.2) of the respective ladder (13.1, 13.2), and wherein a first vertical ladder (13.1) and a second vertical ladder (13.2) of the at least two ladders (13.1, 13.2) are vertically erected at a ladder horizontal spacing (34) from one another, and wherein the at least one scaffolding floor (17.1, 17.3) extends between the first ladder (13.1) and the second ladder (13.2) and is detachably secured to both the first ladder (13.1) and the second ladder (13.2), and wherein secured to the first ladder (13.1) and to the second ladder (13.2) is a side protection double railing (11) which is mountable or mounted in advance and extends between the first ladder (13.1) and the second ladder (13.2) and which comprises an upper strut (35) extending above the at least one scaffolding floor (17.2, 17.3), a lower strut (36) arranged at least partly or substantially or completely above the at least one scaffolding floor and a plurality of connecting struts (37.1, 37.2, 37.3) each fixedly connected with the lower strut (36) and the upper strut (35), characterised in that either the upper strut (35) of the side protection double railing (11) has a first upper strut end (41.1) with a first upper strut suspension unit (42.1) with a first upper strut suspension claw (43.1), which has first upper strut suspension claw sides (44.1.1, 44.1.2) facing away from one another and is open towards its first upper strut suspension claw sides (44.1.1, 44.1.2) and in a first plug-on direction (45.1) and by means of which the upper strut (35) is secured to a first rung (16.8.1) of the rungs (16) of the first ladder (13.1) to be detachable and to be pivotable in a first vertical pivot plane relative to the first ladder (13.1), and wherein the upper strut (35) of the side protection double railing (11) has a second upper strut end (41.2), which extends away from the first upper strut end (41.1), with a second upper strut suspension unit (42.2) with a second upper strut suspension claw (43.1), which has second upper strut suspension claw sides (44.2.1, 44.2.2) facing away from one another and is open towards its second upper strut suspension claw sides (44.2.1, 44.2.2) and in a second plug-on direction (45.2) and by means of which the upper strut (35) is secured to a second rung (16.8.2) of the rungs (16) of the second ladder (13.2) to be detachable and to be pivotable in a second vertical pivot plane relative to the second ladder (13.2), and wherein the upper strut (35) of the side protection double railing (11) has an upper strut length (48) greater than a first rung horizontal spacing (49.1) which the first rung (16.8.1) of the first ladder (13.1) and the second rung (16.8.2) of the second ladder (13.2) have from one another, and wherein the upper strut (35) of the side protection double railing (11) at least in the region of the first upper strut end (41.1) thereof engages over the first rung (16.8.1) of the first ladder (13.1), and wherein the upper strut (35) of the side protection railing (11) at least in the region of the second upper strut end (14.1.2) thereof engages over the second rung (16.8.2) of the second ladder (13.2), and wherein the lower strut (36) of the side protection double railing (11) has a lower strut length (50) greater than a second rung horizontal spacing 49.2) which a third rung (16.7.3) of the rungs (16) of the first ladder (13.1) and a fourth rung (16.7.4) of the rungs (16) of the second ladder (13.2) have from one another, and wherein the third rung (16.7.3) of the first ladder (13.1) is arranged at a first rung vertical spacing (33) below the first rung (16.8.1) of the first ladder (13.1), and wherein the fourth rung (16.7.4) of the second ladder (13.1) is arranged at a second rung vertical spacing (33) below the second rung (16.8.2) of the second ladder (13.2), and wherein the lower strut (36) of the side protection double railing (11) has a first lower strut end (51.1) and a second lower strut end (51.2) extending away therefrom, and wherein the lower strut (36) of the side protection double railing (11) at least in the region of the first lower strut end (51.1) thereof engages under the third rung (16.7.3) of the first ladder (13.1), and wherein the lower strut (36) of the side protection double railing (11) at least in the region of the second lower strut end (51.2) thereof engages under the fourth rung (16.7.4) of the second ladder (13.2), and wherein the upper strut (35) of the side protection double railing (11) at least in the region of the first upper strut end (41.1) thereof and at least in the region of the second upper strut end (41.2) thereof and the lower strut (36) of the side protection double railing (11) at least in the region of the first lower strut end (51.1) thereof and at least in the region of the second lower strut end (51.2) thereof and the first rung (16.8.1) and the third rung (16.7.3) of the first ladder (13.1) and the second rung (16.8.2) and the fourth rung (16.7.4) of the second ladder (13.2) are so configured and arranged in adaptation to one another that the side protection double railing (11) is incapable of demounting without demounting of the first ladder (13.1) or the second ladder (13.2), or the lower strut of the side protection double railing has a first lower strut end with a first lower strut suspension unit with a first lower strut suspension claw, which comprises first lower strut suspension claw sides facing away from one another and is open towards its first lower strut suspension claw sides and in a third plug-on direction and by means of which the lower strut is secured to a third rung of the rungs of the first ladder to be detachable and to be pivotable in a third vertical pivot plane relative to the first ladder, and wherein the lower strut of the side protection double railing has a second lower strut end, which extends away from the first lower strut end, with a second lower strut suspension unit with a second lower strut suspension claw, which has second lower strut suspension claw sides facing away from one another and is open towards its second lower strut suspension claw sides and in a fourth plug-on direction and by means of which the lower strut is secured to a fourth rung of the rungs of the second ladder to be detachable and to be pivotable in a fourth vertical pivot plane relative to the second ladder, and wherein the lower strut of the side protection double railing has a lower strut length greater than a third rung horizontal spacing which the third rung of the first ladder and the fourth rung of the second ladder have from one another, and wherein the lower strut of the side protection double railing at least in the region of the first lower strut end thereof engages over the third rung of the first ladder, and wherein the lower strut of the side protection railing at least in the region of the second lower strut end thereof engages over the fourth rung of the second ladder, and wherein the upper strut of the side protection double railing has an upper strut length greater than a fourth rung horizontal spacing which a first rung of the rungs of the first ladder and a second rung of the rungs of the second ladder have from one another, and wherein the first rung of the first ladder is arranged at a third rung vertical spacing above the third rung of the first ladder, and wherein the second rung of the second ladder is arranged at a fourth rung vertical spacing above the fourth rung of the second ladder, and wherein the upper strut of the side protection double railing has a first upper strut end and a second upper strut end extending away therefrom, and wherein the upper strut of the side protection double railing at least in the region of the first upper strut end thereof engages under the first rung of the first ladder, and wherein the upper strut of the side protection double railing at least in the region of the second upper strut end thereof engages under the second rung of the second ladder, and wherein the lower strut of the side protection double railing at least in the region of the first lower strut end thereof and at least in the region of the second lower strut end thereof and the upper strut of the side protection double railing at least in the region of the first upper strut end thereof and at least in the region of the second supper strut end thereof and the second rung and the fourth rung of the first ladder and the first rung and third rung of the second ladder are so configured and arranged in adaptation to one another that the side protection double railing is incapable of demounting without demounting of the first ladder or the second ladder.

2. Scaffold according to claim 1, characterised in that either the upper strut (36) of the side protection double railing (11) at least in the region of the first upper strut end (41.1) thereof and the lower strut (36) of the side protection double railing (11) at least in the region of the first lower strut end (51.1) thereof have from one another a first strut vertical spacing (52.1) which is only slightly larger than the first rung vertical spacing (33) and wherein the upper strut (35) of the side protection double railing (11) at least in the region of the second upper strut end (41.2) thereof and the lower strut (36) of the side protection double railing (11) in the region of the second lower strut end (51.2) thereof have from one another a second strut vertical spacing (52.2) which is only slightly larger than the second rung vertical spacing (33) or the upper strut of the side protection double railing at least in the region of the first upper strut end thereof and the lower strut of the side protection double railing at least in the region of the first lower strut end thereof have from one another a third strut vertical spacing which is only slightly larger than the third rung vertical spacing and wherein the upper strut of the side protection double railing at least in the region of the second upper strut end thereof and the lower strut of the side protection double railing in the region of the second lower strut end thereof have from one another a fourth strut vertical spacing which is only slightly larger than the fourth rung vertical spacing.

3. Scaffold according to claim 2, characterised in that either the first strut vertical spacing (52.1) is configured to be so adapted to the first rung vertical spacing (33) that the first upper strut suspension claw (43.1) is liftable upwardly (63) at most to such an extent from the first rung (16.8.1) of the first ladder (13.1) that the first upper strut suspension claw (43.1) is incapable of removal from the first rung (16.8.1) of the first ladder (13.1) and wherein the second strut vertical spacing (52.2) is configured to be so adapted to the second rung vertical spacing (33) that the second upper strut suspension claw (43.2) is liftable upwardly at most to such an extent from the second rung (16.8.2) of the second ladder (13.2) that the second upper strut suspension claw (43.2) is incapable of removal from the second rung (16.8.2) of the second ladder (13.2) or the third strut vertical spacing is configured to be so adapted to the third rung vertical spacing that the first lower strut suspension claw is liftable upwardly at most to such an extent from the third rung of the first ladder that the first lower strut suspension claw is incapable of removal from the third rung of the first ladder and wherein the fourth strut vertical spacing is configured to be so adapted to the fourth rung vertical spacing that the second lower strut suspension claw is liftable upwardly at most to such an extent from the third rung of the first ladder that the second lower strut suspension claw is incapable of removal from the third rung of the first ladder.

4. Scaffold according to any one of the preceding claims, characterised in that either the first lower strut end (51.1) of the lower strut (36) extends in a first space (53.1) bounded by two directly successive rungs (16.7.3., 16.6.5) of the first ladder (13.1) and by the associated two vertical struts (15.1, 15.2) of the first ladder (13.1) and the second lower strut end (51.2) of the lower strut (36) extends in a second space (53.2) bounded by two directly successive rungs (16.7.4, 16.6.6) of the second ladder (13.2) and by the associated two vertical struts (15.1, 15.2) of the second ladder (13.1) or the first upper strut end of the upper strut extends in a third space bounded by two directly successive rungs of the first ladder and by the associated two vertical struts of the first ladder and the second upper strut end of the upper strut extends in a fourth space bounded by two directly successive rungs of the second ladder and by the associated two vertical struts of the second ladder.

5. Scaffold according to any one of the preceding claims, characterised in that either the lower strut (36) has between the two lower strut ends (51.1, 51.2) thereof a lower strut middle part (38) which contains a lower strut centre (54) of the lower strut (36) and which has lower strut middle part ends (55.1, 55.2), which face away from one another and from which in each instance a lower strut part (56.1, 56.2) of the lower strut (36) is cranked over in a first transverse direction (62.1) towards the upper strut (35) and / or in a second transverse direction (62.2) away from the respective upper strut end (41.1, 41.2) of the upper strut (35) or towards the respectively associated vertical strut (15.1, 15.2) of the first and second ladders (13.1, 13.2) or the upper strut between the two upper strut ends thereof has an upper strut middle part which contains an upper strut centre of the upper strut and which has upper strut middle part ends, which face away from one another and from which in each instance an upper strut part of the upper strut is cranked over in a third transverse direction towards the lower strut and / or in a fourth transverse direction away from the respective lower strut end of the lower strut or towards the respectively associated vertical strut of the first and second ladders.

6. Scaffold according to claim 5, characterised in that either the lower strut (36) has in the region of each of the two lower strut ends (51.1, 52.2) thereof a respective lower strut end part (57.1, 57.2) which in each instance is cranked over from the lower strut middle part (38) twice or in more than two directions or the upper strut has in the region of each of the two upper strut ends thereof a respective upper strut end part which is cranked over in each instance from the upper strut middle part twice or in more than two directions.

7. Scaffold according to claim 5 or 6, characterised in that either the lower strut middle part (38) extends rectilinearly along a lower strut middle part longitudinal axis (40) of the lower strut middle part (38) parallelly to an upper strut longitudinal axis (39) of the upper strut (35) along which the upper strut (35) extends, wherein the upper strut longitudinal axis (39) extends in a first plane (60.1) containing the lower strut middle part longitudinal axis (40) or the upper strut middle part extends rectilinearly along an upper strut middle part longitudinal axis of the upper strut middle part parallelly to a lower strut longitudinal axis of the lower strut along which the lower strut extends, wherein the lower strut longitudinal axis extends in a second plane containing the upper strut middle part longitudinal axis.

8. Scaffold according to claim 7, characterised in that either each lower strut end part (57.1, 57.2) extends rectilinearly along a lower strut end part longitudinal axis (61.1, 61.2), which extends parallelly to the lower strut middle part longitudinal axis (40) of the lower strut middle part (38), of the respective lower strut end part (57.1, 57.2), or each upper strut end part extends rectilinearly along an upper strut end part longitudinal axis, which extends parallelly to the upper strut middle part longitudinal axis of the upper strut middle part, of the respective upper strut end part.

9. Scaffold according to any one of claims 6 to 8, characterised in that either each lower strut end part (57.1, 57.2) is arranged to be laterally offset in a fifth transverse direction (62.5) with respect to the lower strut middle part (38) or each upper strut end part is arranged to be laterally offset in a sixth transverse direction with respect to the upper strut middle part.

10. Scaffold according to any one of the preceding claims, characterised in that either the upper strut (35) is formed with a straight upper strut rod element (58) which extends along an upper strut longitudinal axis (39) of the upper strut (35) or along the upper strut longitudinal axis (39) of the upper strut (35) and which has a first upper strut rod element end (59.1), which is connected with the first upper strut suspension unit (42.1) or to which the first upper strut suspension unit (42.1) is secured and which has a second upper strut rod element end (59.2) which extends away from the first upper strut rod element end (59.1) in an opposite direction and which is connected with the second upper strut suspension unit (42.2) or to which the second upper strut suspension unit (42.2) is secured or the lower strut is formed with a straight lower strut rod element which extends along a lower strut longitudinal axis of the lower strut or along the lower strut longitudinal axis of the lower strut and which has a first lower strut rod element end, which is connected with the first lower strut suspension unit or to which the first lower strut suspension unit is secured and which has a second lower strut rod element end which extends away from the first lower strut rod element end in an opposite direction and which is connected with the second lower strut suspension unit or to which the second lower strut suspension unit is secured.

11. Scaffold according to any one of the preceding claims, characterised in that either the first lower strut end (51.1) of the lower strut (36) has a first lower strut securing unit (70.1) with a first lower strut claw (71.1) for reception of the first or second vertical strut (15.1, 15.2) of the first ladder (13.1) and with a first locking element (72.1) for locking the first lower strut claw (71.1) with an associated vertical strut (15.1, 15.2) of the first ladder (13.1) and the second lower strut end (51.2) of the lower strut (36) has a second lower strut securing unit (70.2) with a second lower strut claw (71.2) for reception of the first or second vertical strut (15.1, 15.2) of the second ladder (13.2) and with a second locking element (72.2) for locking the second lower strut claw (71.2) to an associated vertical strut (15.1, 15.2) of the second ladder (13.2), wherein the first lower strut claw (71.1) has first lower strut claw sides (71.1.1, 71.1.2) facing away from one another and is open towards its first lower strut claw sides (71.1.1, 71.1.2) and in a fifth plug-on direction (45.5) and the second lower strut claw (71.2) has second lower strut claw sides (71.2.1, 71.2.2) facing away from one another and is open towards its second lower strut claw sides (71.2.1, 71.2.2) and in a sixth plug-on direction (45.6), and wherein the first locking element (72.1) is transferrable to a first open setting in which the first lower strut claw (71.1) can be plugged in the fifth plug-on direction (45.5) onto the associated vertical strut (15.1, 15.2) of the first ladder (13.1) and is transferrable from the first open setting to a first locking setting (76.1) in which the first lower strut claw (71.1) is mechanically positively lockable to the associated vertical strut (15.1, 15.2) of the first ladder (13.1) against removal from the associated vertical strut (15.1, 15.2) of the first ladder (13.1) and the first lower strut claw (71.1) is detachably securable or detachably secured to the associated vertical strut (15.1, 15.2) of the first ladder (13.1) by means of the first locking element (72.1) disposed in its first locking setting (76.1), and the second locking element (72.2) is transferrable to a second open setting in which the second lower strut claw (72.2) can be plugged in the sixth plug-on direction (45.6) onto the associated vertical strut (15.1, 15.2) of the second ladder (13.2) and is transferrable from the second open setting to a second locking setting (76.2) in which the second lower strut claw (71.2) is mechanically positively lockable to the associated vertical strut (15.1, 15.2) of the second ladder (13.2) against removal from the associated vertical strut (15.1, 15.2) of the second ladder (13.2) and the second lower strut claw (71.2) is detachably securable or detachably secured to the associated vertical strut (15.1, 15.2) of the second ladder (13.2) by means of the second locking element (72.2) disposed in its second locking setting (76.2) or the first upper strut end of the upper strut has a first upper strut securing unit with a first upper strut claw for reception of the first or second vertical strut of the first ladder and with a third locking element for locking the first upper strut claw to an associated vertical strut of the first ladder and the second upper strut end of the upper strut has a second upper strut securing unit with a second upper strut claw for reception of the first or second vertical strut of the second ladder and with a fourth locking element for locking the second upper strut claw to an associated vertical strut of the second ladder, wherein the first upper strut claw has first upper strut claw sides facing away from one another and is open towards its first upper strut claw sides and in a seventh plug-on direction and the second upper strut claw has second upper strut claw sides facing away from one another and is open towards its second upper strut claw sides and in an eighth plug-on direction, and wherein the third locking element is transferrable to a third open setting in which the first upper strut claw can be plugged in the seventh plug-on direction onto the associated vertical strut of the first ladder and is transferrable from the third open setting to a third locking setting in which the first upper strut claw is mechanically positively lockable to the associated vertical strut of the first ladder against removal from the associated vertical strut of the first ladder and the first upper strut claw is detachably securable or detachably secured to the associated vertical strut of the first ladder by means of the third locking element disposed in its third locking setting and the fourth locking element is transferrable to a fourth open setting in which the second upper strut claw can be plugged in the eighth plug-on direction onto the associated vertical strut of the second ladder and is transferrable from the fourth open setting into a fourth locking setting in which the second upper strut claw is mechanically positively lockable to the associated vertical strut of the second ladder against removal from the associated vertical strut of the second ladder and the second upper strut claw is detachably securable or detachably secured to the associated vertical strut of the second ladder by means of the fourth locking element disposed in its fourth locking setting.

12. Scaffold according to claim 11, characterised in that either the first lower strut claw (71.1) of the first lower strut securing unit (70.1) is open in the fifth plug-on direction (45.5) perpendicularly to the first plug-on direction (45.1) in which the first upper strut suspension claw (43.1) of the first upper strut suspension unit (42.1) is open and the second lower strut claw (71.2) of the second lower strut securing unit (70.2) is open in the sixth plug-on direction (45.6) perpendicularly to the second plug-on direction (45.2) in which the second upper strut suspension claw (43.2) of the second upper strut suspension unit (42.2) is open or the first upper strut claw of the first upper strut securing unit is open in the seventh plug-on direction perpendicularly to the third plug-on direction in which the first lower strut suspension claw of the first lower strut suspension unit is open and the second upper strut claw of the second upper strut securing unit is open in the eighth plug-on direction perpendicularly to the fourth plug-on direction in which the second lower strut suspension claw of the second lower strut suspension unit is open.

13. Scaffold according to any one of the preceding claims, characterised in that either the first upper strut end or the first upper strut suspension unit of the upper strut has a fifth locking element for locking the first upper strut suspension claw to the first rung of the first ladder and the second upper strut end or the second upper strut suspension unit of the upper strut has a sixth locking element for locking the second upper strut suspension claw to the second rung of the second ladder, and wherein the fifth locking element is transferrable to a fifth open setting in which the first upper strut suspension claw can be plugged in the first plug-on direction onto the first rung of the first ladder and is transferrable from the fifth open setting to a fifth locking setting in which the first upper strut suspension claw is locked to the first rung of the first ladder against removal from the first rung of the first ladder and wherein the sixth locking element is transferrable to a sixth open setting in which the second upper strut suspension claw can be plugged in the second plug-on direction onto the second rung of the second ladder and is transferrable from the sixth open setting to a sixth locking setting in which the second upper strut suspension claw is locked to the second rung of the second ladder against removal from the second rung of the second ladder or the first lower strut end or the first lower strut suspension unit of the lower strut has a seventh locking element for locking the first lower strut suspension claw to the third rung of the first ladder and the second lower strut end or the second lower strut suspension unit of the lower strut has an eighth locking element for locking the second lower strut suspension claw to the fourth rung of the first ladder, and wherein the seventh locking element is transferrable to a seventh open setting in which the first lower strut suspension claw can be plugged in the third plug-on direction onto the third rung of the first ladder and is transferrable from the seventh open setting to a seventh locking setting in which the first lower strut claw is locked to the third rung of the first ladder against removal from the third rung of the first ladder, and wherein the eighth locking element is transferrable to an eighth open setting in which the second lower strut suspension claw can be plugged in the fourth plug-on direction onto the fourth rung of the second ladder and is transferrable from the eighth open setting to an eighth locking setting in which the second lower strut claw is locked to the fourth rung of the second ladder against removal from the fourth rung of the second ladder.

14. Scaffold according to any one of claims 1 to 13, characterised in that either the first upper strut suspension claw (43.1) of the upper strut (35) of the side protection double railing (11) is open downwardly (64) in the first plug-on direction (45.1) and the second upper strut suspension claw (43.2) of the upper strut (35) of the side protection double railing (11) is open downwardly (64) in the second plug-on direction (45.2) or the first lower strut suspension claw of the lower strut of the side protection double railing is open downwardly in the third plug-on direction and the second lower strut suspension claw of the lower strut of the side protection double railing is open downwardly in the fourth plug-on direction.

15. Scaffold according to any one of claims 1 to 14, characterised in that either the first plug-on direction (45.1) in which the first upper strut suspension claw (43.1) of the upper strut (35) of the side protection double railing (11) is open and the second plug-on direction (45.2) in which the second upper strut suspension claw (43.2) of the upper strut (35) of the side protection double railing (11) is open are the same or parallel to one another or the third plug-on direction in which the first lower strut suspension claw of the lower strut of the side protection double railing is open and the fourth plug-on direction in which the second lower strut suspension claw of the lower strut of the side protection double railing is open are the same or parallel to one another.