EP3765685B1 - Scaffold stairway having step holders - Google Patents

Description

The invention relates to a scaffolding staircase made of metal, plastic or carbon fiber composite material with step supports.

The EP 1 893 827 B1 discloses a scaffolding staircase in which the stair step elements can be detachably coupled to one another by inserting them into one another and to the side stringers by means of holding devices. For this purpose, hooks are arranged on the side stringers as holding devices, which can engage in openings in the stair steps.

In DE 1 409 302 A1 describes a ladder consisting of side beams and rungs, in which a groove or rib running on the surface of side beams in their longitudinal direction engages a rib or groove running on the surface of rungs in their longitudinal direction in order to forcibly prevent the rungs from rotating about their longitudinal axis. Furthermore, in the EP 0 276 488 B1 a scaffolding staircase is disclosed, the components of which can be manufactured from light metal, for example aluminum, using the extrusion process. The steps are welded to the side walls of the scaffolding staircase in a predetermined arrangement. Hooks of various types, which have to be arranged as additional components on the staircase, for example welded on, lead to a higher time expenditure in the manufacture of the known scaffolding staircase. In document FR 2 847 010 A1 a mounted element extends to a rear wall of the element and in document BE 857 632 A a stair element extends to the back wall of a side panel.

It is therefore the object of the invention to provide a scaffolding staircase with holding devices that can be manufactured in a stable form with as little time as possible. It is also the object of the invention to provide a staircase arrangement with as little time as possible for production. It is also the object of the invention to provide a side stringer for a scaffolding staircase according to the invention.

The object is achieved by a scaffolding staircase according to claim 1. The features of the staircase arrangement can be found in claim 15. Advantageous embodiments emerge from the respective dependent claims.

According to the invention, the scaffolding staircase has the features of claim 1. Using the grooves in the side stringers into which the steps are inserted, the scaffolding staircase can be made by plug connections. Welding to attach the steps to the side stringers is not necessary. The vertical forces that occur when using the staircase at the connections of the step elements or steps to the side stringers are absorbed by the side stringers and diverted to the side stringers. The step elements do not rest on additionally attached components such as hooks that protrude exposed over the side stringers. Welded connections can be dispensed with. The forces or loads acting on the step elements are introduced into the side stringers without additional components. This ensures that the connection between the step elements and the side stringers is very stable, even when the staircase is used for longer periods. Optionally, additional components such as screws, hooks, rivets, bolts or adhesive can be used to secure the position of the step elements. Despite the fact that the side stringers have Hollow profile in the form of the groove flanks or groove flank sections provides a support surface for the stair elements with sufficient strength. The scaffolding stairs at least have metal or are made of metal, such as the side cheeks and the stair elements. The side surfaces of the side cheeks facing each other form inner surfaces of the side cheeks, the side surfaces of the side cheeks facing away from each other form outer surfaces of the side cheeks. The scaffolding stairs can be made of metal, a metal alloy, steel, plastic and/or a carbon fiber composite material.

The grooves can be aligned parallel so that all stair treads can be inserted into the side panels with the same alignment.

A further design of the scaffolding steps is characterized in that the same angle is formed between each groove and the longitudinal edges of the respective side stringers. In order to achieve a horizontal alignment of the stair elements, this angle can in particular correspond to a pitch angle of the side stringers. The longitudinal edges can be closed or at least partially open.

The spacing from the ends of the side stringers, with which the grooves in the side stringers are formed, can be the same on both side stringers. This means that all steps can be connected to the side stringers horizontally aligned in the direction of their width.

In an advantageous embodiment of the scaffolding stairs, the side cheeks have a hollow profile and/or foam inside the side cheeks designed as a hollow profile. A hollow profile allows both the weight and the material consumption to be reduced compared to a solid material. By filling the inside of the side walls with foam, the stability of the side walls can be increased with a relatively small increase in weight.

According to the invention, the side cheeks have first stops for the stair step elements at the height of the grooves. The side cheeks are then pushed onto the stair step elements according to the invention without the stair step elements protruding beyond the side cheeks. The correct width of the stairs is determined during assembly without further adjustment or adaptation by the stops and the length of the stair step elements. The height is in particular the vertical distance from the lower end of the respective side cheek to the upper end of the respective side cheek when assembled.

A further design of the scaffolding stairs is characterized in that the side cheeks have openings, in particular for rivets or bolts, at the level of the grooves on the side surfaces facing away from each other. The stair step elements can then be attached to the side cheeks using rivets. Alternatively or in addition to this, the stair step elements can be attached to the side cheeks using bolts, screws, for example with a Torx profile, clinching or toxing.

At the level of the grooves closest to the ends of the side cheeks, a groove can be formed parallel to these grooves on the side surfaces of the side cheeks facing away from each other. The grooves closest to the ends of the side cheeks on the side surfaces facing towards and away from each other can be used for the correct positioning and fastening of other components of a staircase arrangement, in particular when sliding on landings, at the lower and upper ends of the side cheeks.

According to the invention, at least one protruding rib is formed on the side surfaces facing each other, in particular on the side surfaces facing each other and the side surfaces facing away from each other, of the side cheeks, in particular in the middle, in the longitudinal direction of the respective side cheek, which has the grooves or groove sections. The grooves are formed in the rib in the form of recesses, for example by milling, whereby the side cheeks still have sufficient stability or strength. The recess depths or groove depths in the side cheeks are limited and end at the height of the grooves between the ribs of the hollow profile.

Alternatively, according to the invention, the side cheeks have ribs that are regularly or irregularly spaced from one another. In particular, a first rib can be formed on a first longitudinal edge and a second rib on a second longitudinal edge. Multiple ribs increase the rigidity of the side cheeks and provide more stable support for the stair step elements. The grooves can be formed by recesses in the ribs over the entire width of the respective side cheek between the longitudinal edges and thus enable more stable guidance of the free ends of the stair step elements in the grooves, in particular when inserting the stair step elements. The groove flanks can form a support surface for the stair step elements.

In a further embodiment of the scaffolding steps, a first, second, third and fourth protruding rib is arranged on the mutually facing surfaces of the side cheeks. Of the ribs, in particular the first and fourth protruding rib are arranged on the longitudinal edges of the side cheeks and the second and third protruding ribs are arranged between the first and fourth protruding rib.

The second and third protruding ribs can be spaced apart from one another by a greater distance than the first and second protruding ribs are spaced apart from one another and the third and fourth protruding ribs are spaced apart from one another. The distances between the first and second ribs and between the third and fourth ribs can in particular be the same.

Hollow chambers can be formed in at least one side wall. The side walls of the hollow chambers can provide better stiffening of the side walls.

The steps can have hook-shaped tabs, in particular with openings into which bolts or rivets can be inserted. The tabs can then be attached to the side walls with bolts and/or rivets so that they can be moved or fixed in place for secure fixing.

The side panels advantageously have a gradient of 30° to 55°. Such a gradient enables the stairs to be climbed safely and quickly in accordance with the DIN EN 12811 standard.

The scaffolding stairs can be made of a light metal, especially aluminum. Such a scaffolding staircase is very stable despite its relatively low weight.

A staircase arrangement has a scaffold staircase according to the invention and a platform arranged on the scaffold staircase, in particular one that can be releasably fixed. The staircase arrangement can in particular have a platform arranged at each end of the scaffold staircase. A platform provides a better connection, for example for easy access without additional components, of the scaffold staircase to adjacent components, such as scaffolding parts (scaffolding posts, scaffolding tubes, scaffolding decking).

An advantageous embodiment of the staircase arrangement is characterized in that the platform has two slots and/or two profile rails, into or between which a side stringer of the scaffolding staircase can be inserted. The slots and/or the profile rails each have a second stop for the side stringers. The platform can be arranged on the scaffolding staircase in a simple manner using such slots or rails.

The flanks of each slot and/or each profile rail can have two opposing springs. Each spring can be inserted into one of the grooves that are formed closest to the ends of the side cheeks on each side surface. Such springs can be used to secure the side cheeks against vertical displacement in relation to the platforms when the springs engage in the corresponding grooves. When using such springs and grooves, the entire force is transferred from the scaffolding steps to the platforms. This enables a rigid connection between the scaffolding steps and the platforms, in particular without additional components.

The slots and/or the profile rails can have openings into which bolts or rivets can be inserted. The platform can be easily attached to the scaffolding stairs using such bolts and/or rivets. It also provides protection against displacement, particularly in the horizontal direction, and allows additional vertical force to be absorbed.

The length of the scaffolding stairs in the horizontal direction can be designed by choosing different platforms with different lengths. The height of the scaffolding stairs in the vertical direction can also be Direction can be varied, among other things, by choosing different lengths of the side stringers of the scaffolding stairs and different angles of inclination of the side stringers.

The scaffolding staircase according to the invention can be manufactured in particular without welded joints. The stair elements are permanently connected to the side stringers. The platforms can be removed from the scaffolding staircase without any major effort for space-saving transport.

A side stringer of a scaffolding staircase made of metal, plastic or carbon fiber composite material has grooves formed on a side surface which are designed at a distance from one another to accommodate stair step elements.

In the side panels of a scaffolding staircase, the grooves can be open at least at one end.

Short description of the drawing

Further features and advantages of the invention emerge from the following detailed description of several embodiments of the invention, from the patent claims and from the figures of the drawing, which show details essential to the invention. The features shown in the drawing are shown in such a way that the special features of the invention can be made clearly visible.

Fig. 1

eine Explosionsdarstellung der erfindungsgemäßen Gerüsttreppe;

Fig. 2

einen Querschnitt durch eine erste Ausführungsform einer Seitenwange der Gerüsttreppe;

Fig. 3a

eine isometrische Darstellung eines freien Endes eines Treppenstufenelements in einer ersten Ausführungsform mit einem Ausschnitt einer Seitenwange;

Fig. 3b

eine isometrische Darstellung eines freien Endes eines Treppenstufenelements in einem illustrativen Beispiel mit einem Ausschnitt einer Seitenwange;

Fig. 4

eine isometrische Darstellung eines in einer Seitenwange befestigten Treppenstufenelements;

Fig. 5

eine isometrische Darstellung eines ersten Podestes der Gerüsttreppe von oben;

Fig. 6

eine isometrische Ansicht des ersten Podestes der Gerüsttreppe von unten;

Fig. 7

eine isometrische Ansicht eines zweiten Podestes der Gerüsttreppe von oben;

Fig. 8

eine isometrische Ansicht des zweiten Podestes der Gerüsttreppe von unten;

Fig. 9

eine isometrische Ansicht eines unteren Endes einer Seitenwange und eines korrespondierenden Schlitzes des ersten Podestes;

Fig. 10

eine isometrische Ansicht eines Baugerüstes mit der erfindungsgemäßen Gerüsttreppe;

Fig. 11

einen Querschnitt durch eine zweite Ausführungsform einer Seitenwange der Gerüsttreppe;

Fig. 12

einen Querschnitt durch eine dritte Ausführungsform einer Seitenwange der Gerüsttreppe;

Fig. 13

einen Querschnitt durch eine vierte Ausführungsform einer Seitenwange der Gerüsttreppe;

Fig. 14

einen Querschnitt durch eine fünfte Ausführungsform einer Seitenwange der Gerüsttreppe;

Fig. 15

eine isometrische Darstellung der zweiten Ausführungsform einer Seitenwange;

Fig. 16

eine isometrische Darstellung der dritten Ausführungsform einer Seitenwange;

Fig. 17

eine isometrische Darstellung der vierten Ausführungsform einer Seitenwange; und

Fig. 18

eine isometrische Darstellung der fünften Ausführungsform einer Seitenwange.

In the drawing show:

Fig.1

an exploded view of the scaffolding stairs according to the invention;

Fig.2

a cross-section through a first embodiment of a side stringer of the scaffolding stairs;

Fig. 3a

an isometric representation of a free end of a stair element in a first embodiment with a section of a side stringer;

Fig. 3b

an isometric view of a free end of a stair element in an illustrative example with a section of a side stringer;

Fig.4

an isometric view of a stair element attached to a side stringer;

Fig.5

an isometric view of a first landing of the scaffolding stairs from above;

Fig.6

an isometric view of the first landing of the scaffolding stairs from below;

Fig.7

an isometric view of a second landing of the scaffolding stairs from above;

Fig.8

an isometric view of the second landing of the scaffolding stairs from below;

Fig.9

an isometric view of a lower end of a side wall and a corresponding slot of the first platform;

Fig.10

an isometric view of a scaffolding with the scaffolding stairs according to the invention;

Fig. 11

a cross-section through a second embodiment of a side stringer of the scaffolding stairs;

Fig. 12

a cross-section through a third embodiment of a side stringer of the scaffolding stairs;

Fig. 13

a cross-section through a fourth embodiment of a side stringer of the scaffolding stairs;

Fig. 14

a cross-section through a fifth embodiment of a side stringer of the scaffolding stairs;

Fig. 15

an isometric view of the second embodiment of a sidewall;

Fig. 16

an isometric view of the third embodiment of a sidewall;

Fig. 17

an isometric view of the fourth embodiment of a sidewall; and

Fig. 18

an isometric view of the fifth embodiment of a sidewall.

In Fig.1 a scaffolding staircase 10 according to the invention is shown in an exploded view. The scaffolding staircase 10 has a first side cheek 12 and a second side cheek 14 , which is arranged at a distance from the first side cheek 12 and parallel to this runs. The side cheeks 12, 14 are hollow metal profiles, preferably made of aluminum. The scaffolding stairs 10 have stair step elements, one stair step element being designated 16 here as an example. The stair step elements each have two free ends, one of which is designated 17 here as an example. Recesses in the form of grooves are formed in the side cheeks 12, 14 as holding devices for holding the stair step elements 16, one of which is designated 18 here as an example. When the scaffolding stairs 10 are assembled, the stair step elements 16 are firmly arranged in these grooves 18. The side cheeks 12, 14 have two side surfaces facing each other in the form of inner surfaces, one of which is designated 19 here as an example. When assembled, the side cheeks 12, 14 have an incline angle 20 with respect to a horizontal floor surface. Furthermore, the side walls 12, 14 have two side surfaces facing away from one another in the form of outer surfaces, one of which is designated here as 21 by way of example. A first platform 22 and a second platform 24 are arranged on the scaffolding steps 10. The first platform 22 is arranged at the bottom of the scaffolding steps 10 when the scaffolding steps 10 is assembled, and the second platform 24 is arranged at the top of the side walls 12, 14 when the scaffolding steps 10 is assembled. A first fitting 26 is arranged on the outside of the first platform 22 and a first panel 28 is arranged on the inside, towards the side walls. A second fitting 30 is arranged on the outside of the second platform 24 and a second panel 32 is arranged on the inside. The fittings 26, 30 and panels 28, 32 serve to reinforce and stabilize the platforms 22, 24. The first and second fittings 26, 30 on the outside also serve to anchor the platforms 22, 24 to other building elements. For this purpose, the two fittings 26, 30 each have a first hook 34 and a second hook 36 in their outer area. These hooks 34, 36 can, for example, be a bar of a scaffolding frame (see Fig.10 ) at least encompass sections. The two fittings 26, 30 also have a lifting protection 42 to prevent upward displacement. All components of the staircase are preferably made of aluminum or another light metal. The stair step elements 16 and the landings 22, 24 have a profiled surface for increased slip resistance. The fittings 26, 30 are made primarily of steel.

In Fig. 2 is a cross-section through a first embodiment of the side cheeks 12, 14, here the side cheek 12 as an example. The features of a side cheek 12, 14 mentioned in the following text are shown in the other side cheek 12, 14 in a corresponding manner. The side cheek 12 is designed as a hollow profile 43. The side cheek 12 has a first, second, third and fourth rib 44a, 44b, 44c, 44d for reinforcement and to form the grooves. The first rib 44a and the fourth rib 44d are each positioned on the edge of the side cheek 12. The second rib 44b and the third rib 44c are located between the first rib 44a and the fourth rib 44d. The distances 46a, 46b between the first and second ribs 44a, 44b and the third and fourth ribs 44c, 44d are in particular the same size. These distances 46a, 46b are smaller than the distance 46c between the second rib 44b and the third rib 44c. Between the ribs 44a - 44d, a first, second and third groove 48a, 48b, 48c in the form of depressions are formed along these distances 46a, 46b, 46c. The ribs 44a-44d have a rib height 49. The rib height 49 is given in particular by the maximum distance between the ribs 44a-44d and the grooves 48a, 48b, 48c in the direction perpendicular to the surface of the ribs 44a-44d. The ribs 44a-44d are arranged on a side 50 of the side cheek 12 on the longitudinal edges 52a, 52b and/or between the longitudinal edges 52a, 52b of the side cheek 12, on which the stair step elements 16 can be arranged, in particular on the inner surface 19 of the side cheek 12 (see. Fig.1 ). On page 50 opposite side 54 of the side cheek 12, in particular the outer surface 21 of the side cheek 12 (see Fig.1 ), ribs 44e, 44f, 44g, 44h and grooves 48d, 48e, 48f can also be formed, in particular in the same way as on page 50.

In Fig. 3a a free end 17 of a stair step element 16 is shown in a first embodiment with a cutout 58 of a side cheek 12, 14, here by way of example the side cheek 12, in which the free end 17 of the stair step element 16 is fastened. The ribs 44a - 44d formed on the inner surface 19 of the side cheek 12 have, in this fastening area in the assembled state, groove sections 59a, 59b, 59c, 59d arranged next to one another in the horizontal direction in the form of recesses with groove flank sections in the form of the edges of the groove sections 59a - 59d, of which two are designated here by way of example with 60a, 60b . The groove sections 59a - 59d extend over the entire width of the respective rib 44a - 44d in a direction perpendicular to the longitudinal edges 52a, 52b of the side cheek 12 along the side cheek 12. Perpendicular to the side cheeks 12 in the direction of the stair step elements 16, the groove sections 59a-59d extend over the entire rib height 49 (see. Fig.2 ) of the ribs 44a - 44d from the grooves 48a - 48c (see Fig.2 ) of the side cheek 12 between the ribs 44a - 44d. This rib height 49 determines the depth of the groove 18. The respective rib 44a - 44d is completely interrupted in the area of the groove sections 59a - 59d. In the area of the groove sections 59a - 59d, the side cheek 12 has no elevation, but rather groove-shaped openings along its length. The groove sections 59a - 59d form the groove 18 according to the invention. The edges of the groove sections 59a-59d form a first stop 61 for the free end 17 of the stair step element 16. In order to prevent the stair step elements 16 from falling out, the stair step elements 16 can be secured to the stair step elements 16, for example by gluing or welding with the respective side walls 12, 14.

In Fig. 3b a free end 17 of a stair element 16 is shown in an illustrative example with the cutout 58 of the side cheek 12. As in Fig. 3a the ribs 44a - 44d on the inner surface 19 of the side cheek 12 are shown with the groove sections 59a - 59d, which extend perpendicular to the longitudinal edges 52a, 52b of the side cheek 12 along the side cheek 12. The groove sections 59a - 59d together form the groove 18 according to the invention. The edges of the groove sections 59a - 59d form the first stop 61 for the free end 17 of the stair step element 16 in the second embodiment. The free end 17 of the stair step element 16 in the second embodiment has tabs, one of which is designated here as 62 by way of example. The tabs 62 can be guided through the groove sections 59a-59d of the side cheek 12 and attached to the outside of the side cheek 12 (see Fig.4 ), for example by riveting, clinching, toxing, bolting, screwing or gluing. The stair step elements 16 have dome-shaped elevations which are designed for increased slip resistance.

In Fig.4 a stair step element 16 fastened in a side cheek 12, 14, here by way of example the side cheek 14, is shown in the second embodiment. The free end 17 of the stair step element 16 is inserted into the groove 18, wherein it rests on the lower edge of the groove 18. In particular, a tab 62 of the free end 17 of the stair step element 16 is shown, which is on the outer surface 21 of the side cheek 14 in one of the grooves 48d, 48e, 48f (see. Fig.2 ) is attached. The tab 62 rests on the inside against a rib 44e - 44h, here for example the rib 44f, of the outer surface 21 of the side cheek 14. Openings are formed on the outer surface 21 of the side cheek 14 and in the tab 62, one of which is designated here as 66 , by way of example. which rivets (not shown) can be passed through to fasten the stair element 16 to the side cheeks 12, 14.

In Fig.5 is a view of the first platform 22 with the first panel 28 and the first fitting 26 from above. The first hook 34 and the second hook 36 for hooking into a scaffolding frame or bar are arranged on the first fitting 26 in its outer area. These hooks 34, 36 can, for example, be a bar of a scaffolding frame (see Fig.10 ) at least in sections. The lifting protection 42 for securing the scaffolding steps 10 (see Fig.1 ) against upward displacement is arranged centrally on the first fitting 26 in the assembled state. The first platform 22 has a handle 68 for transporting the first platform 22.

The first platform 22 has slots 70a, 70b with a width such that a side wall 12, 14 (see Fig.1 ) can be inserted into a respective slot 70a, 70b for arranging the side cheeks 12, 14 on the first platform. A second stop 72a, 72b is formed on each of the slots 70a, 70b, which can limit the insertion distance of the side cheeks 12, 14 into the first platform 22 to the length of the respective slot 70a, 70b.

The first platform 22 is designed as a lower platform and can be removed from the side walls 12, 14 if required in order to transport the scaffolding stairs 10 in a space-saving manner.

In Fig.6 is a view of the first platform 22 with the first panel 28 and the first fitting 26 as well as the first hook 34, the second hook 36 and the anti-lift device 42 from below. In the assembled state, the first platform 22 has profile rails 74a, 74b, 74c on the underside.

In Fig.7 is a view of the second platform 24 with the second panel 32 from above. On the second fitting 30 (see Fig.1 ), the first hook 34 and the second hook 36 are designed to hook into a horizontal scaffolding bar (see Fig.10 ). The second platform 24 also has a handle 68 for transporting the second platform 24. In the assembled state, the second platform 24 has profile rails 74a, 74b, 74c, 74d, 74e, 74f on its underside, wherein pairs of profile rails 74a-74f are spaced apart such that a side wall 12, 14 (see Fig.1 ) can be inserted. A part of the profile rails 74a-74f delimits hollow chambers formed on the underside of the second platform 24 for stiffening the platform 24, two of which are designated here as examples with 76a, 76b .

In Fig.8 is a view of the second platform 24 with the second panel 32 and the second fitting 30 and the profile rails 74a-74f as well as the hollow chambers 76a, 76b from below. Between the profile rails 74b-74e there are second stops 72a, 72b for the side walls 12, 14 (see Fig.1 ) are arranged.

In Fig.9 is the lower end 77 of a side cheek 12, 14 in the assembled state, here by way of example the side cheek 14, and a corresponding slot 70a, 70b, here slot 70a, of the first platform 22. Springs 80a, 80b are formed on the flanks 78a, 78b of the slot 70a. Opposite the groove 18 on the inner surface 19 of the side cheek 14, which is formed closest to the lower end 77 of the side cheek 14, a groove 82 is also formed on the outer surface 21 of the side cheek 14. The groove 82 on the outer surface 21 of the side cheek 14 runs parallel to the groove 18 on the inner surface and is at the same distance 83 from the lower end 77 of the relevant Side cheeks are formed like the groove 18 on the inner surface 19 of the side cheek 14 that is closest to the lower end 77 of the side cheek 14. The springs 80a, 80b can be inserted into the grooves 18, 82 on the inner and outer surfaces 19, 21 of the side cheek 14 that are closest to the lower ends 77 of the side cheek 14. The side cheek 14 is thereby secured against vertical displacement in relation to the first platform 22.

Corresponding springs 80a, 80b can be formed on the flanks 78a, 78b of the profile rails 74a, 74b of the second platform 24, into which grooves 18, 82 on the inner and outer surface 19, 21 of the respective side cheeks 12, 14 can engage at the corresponding end 77 of the side cheeks 12, 14. The side cheeks 12, 14 can then be fastened to the second platform 24 in a vertically immovable manner. Through this connection between the platforms 22, 24 and the side cheeks 12, 14, the entire force transmission via the platforms 22, 24 to a scaffold (see. Fig.10 ) is ensured. An additional connection by means of screws, rivets, adhesives or bolts can support this connection and secure the side walls 12, 14 against slipping out.

In Fig.10 is an isometric representation of a scaffold 84 with scaffold stairs 10 according to the invention in the assembled state. The stair elements 16 are attached to the side cheeks 12, 14, whereby the side cheeks 12, 14 are coupled to one another. The first and/or second platforms 22, 24 are hooked onto bars 86 of the scaffold 84 to attach the scaffold stairs 10. The extension 88 of the scaffold stairs 10 in the horizontal direction can be designed differently, among other things, by choosing different first and/or second platforms 22, 24. Likewise, the height 90 of the scaffold stairs 10 in the vertical direction can be varied, among other things, by choosing different lengths of the scaffold stairs 10 and different Pitch angle 20 (see Fig.1 ) can be designed differently.

In Figure 11 is a cross-section through a second design of side walls, here as an example of a side wall 12 ^(I) . The side wall 12 ^(I) is designed as a hollow profile 43 ^(I) . For reinforcement and for the formation of the grooves 18 (see Fig.1 ), the side wall 12 ^(I) has hollow chambers with side walls, whereby here, by way of example, two hollow chambers are designated 92a, 92b with side walls 93a, 93b .

In Figure 12 is a cross-section through a third design of side cheeks, here the side cheek 12 ^(II) as an example. The side cheek 12 ^(II) is designed as a hollow profile 43 ^(II) . The side cheek 12 ^(II) has a rectangular fifth rib and sixth rib 44i, 44j on the opposite sides 50 ^(II) , 54 ^(II) of the side cheek 12 ^(II) for stiffening and to form the grooves. The fifth and sixth ribs 44i, 44j are each designed symmetrically in relation to the center of the respective side 50 ^(II) , 54 ^(II) . They have the same distances 94a, 94b to the longitudinal edges 52a ^(II) , 52b ^(II) .

In Figure 13 a cross section through a fourth embodiment of the rectangular side walls designed as a hollow profile 43 ^(III) , here the side wall 12 ^(III) as an example, is shown. On opposite sides 50 ^(III) , 54 ^(III) , ribs 44k, 44l, 44m, 44n with the same rectangular design are formed on longitudinal edges 52a ^(III) , 52b ^(III) , which have equal distances 94c, 94d from each other in pairs on each side 50 ^(III) , 54 ^(III) .

In Figure 14 is a cross-section through a fifth embodiment of the rectangular side walls designed as a hollow profile 43 ^(IV) , here as an example the side wall 12 ^(IV) . On page 50 ^(IV) are Ribs 44o, 44p are formed on the longitudinal edges 52a ^(IV) , 52b ^(IV) . Additional ribs are arranged at irregular intervals between the ribs 44o, 44p, one of which is designated here as 44q by way of example. On the opposite side 54 ^(IV), a rib 44r is formed on the longitudinal edge 52a ^(IV) . Additional ribs are formed along the side 54 ^(IV) , one of which is designated here as 44s by way of example and which are spaced irregularly from one another.

In Figure 15 is an isometric representation of the second embodiment of the side cheeks, here the side cheek 12 ^(I) as an example. In the side cheek 12 ^(I) and the side walls 93a, 93b of the hollow chambers 92a, 92b, a groove 18 ^(I) with groove flanks 96a, 96b is formed according to the invention. A stair element 16 (see Fig. 3a ) can be arranged transversely to the side walls 93a, 93b, the longitudinal edges, whereby in the Fig. 15 the longitudinal edge 52a ^(I) is shown, and are inserted along the groove flanks 96a, 96b into the groove 18 ^(I) .

In Figure 16 is an isometric representation of the third embodiment of the side cheeks, here as an example the side cheek 12 ^(II) . In the rectangular fifth rib 44i, a groove 18 ^(II) with groove flanks 96a, 96b is formed according to the invention. The depth of the groove 18 ^(II) is determined by the rib height 49 (see. Fig.2 ) was given.

In Figure 17 is an isometric view of the fourth embodiment of the side walls, here as an example the side wall 12 ^(III) . In the ribs 44k, 44l on the longitudinal edges, whereby in the Fig. 17 the longitudinal edge 52a ^(III) is shown, groove sections 59a, 59b are formed with groove flank sections 60a, 60b. A stair element 16 (see Fig. 3a ) can be guided along the groove flank sections 60a, 60b and inserted into the groove sections 59a, 59b. When inserted The stair step element 16 rests on the groove flank sections 60a, 60b.

In Figure 18 is an isometric representation of the fifth embodiment of the side walls, here as an example the side wall 12 ^(IV) . In the irregularly spaced ribs 44o, 44p, 44q on the longitudinal edges, whereby in the Fig. 18 the longitudinal edge 52a ^(IV) is shown, groove sections 59a, 59b are formed with groove flank sections 60a, 60b.

Taking a look at all the figures in the drawing, the invention as defined in claim 1 relates in summary to a scaffolding staircase 10 with two spaced-apart side cheeks 12, 14; 12 ^(I) , 14 ^(I) ; 12 ( ^{II )} , 14 ( ^II) ; 12 ^(III) , 14 (III); 12 ^(IV) designed as hollow profiles 43; 43 (I); 43 ^{(II )} ; 43 ^{(III) ;} 43 ^(IV) and a plurality of separate stair step elements or stair steps 16. The stair steps 16 are arranged with their free ends 17 in grooves 18; 18 ^(I) ; 18 ^(II) ; 18 ^(III) ; 18 ^(IV) on the mutually facing side surfaces 19 of the side cheeks 12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) are fastened to holding devices designed to hold the steps. The free ends 17 of the steps 16 rest on a groove flank 96a, 96b or a groove flank section 60a, 60b. The side cheeks 12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) are thereby coupled. At least on the side surfaces (19) facing each other, in particular on the side surfaces (19) facing each other and the side surfaces (21) facing away from each other, of the side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ) is/are formed at least one protruding rib (44a - 44s), in particular in the middle, or regularly or irregularly spaced ribs (44a - 44s) in the longitudinal direction of the respective side cheek (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ), which form the grooves (18; 18 ^(I) ; 18 ^(II) ; 18 ^(III) ; 18 ^(IV) ; 82) or groove sections (59a - 59d). The grooves (18; 18 ^(I) ; 18 ^(II) ; 18 ^(III) ; 18 ^(IV) ) in the rib (44a - 44s) or the ribs (44a - 44s) are designed in the form of recesses, wherein recess depths or groove depths in the side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ) are limited and are either given by a rib height (49) of the at least one rib (44a - 44s) or end at the height of grooves (48a - 48c) between the ribs (44a - 44s) of the hollow profile. The side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ) have first stops (61) for the stair step elements (16) at the level of the grooves (18; 18 ^(I) ; 18 ^(II) ; 18 ^(III) ; 18 ^(IV) ) so that the side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ) are pushed onto the stair step elements (16) without the stair step elements (16) being pushed over the side surfaces facing away from one another. (21) of the side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ), and without the stair elements (16) protruding through the mutually opposite side surfaces (21) of the side cheeks (12, 14; 12 ^(I) , 14 ^(I) ; 12 ^(II) , 14 ^(II) ; 12 ^(III) , 14 ^(III) ; 12 ^(IV) , 14 ^(IV) ).

Claims (18)

1. Scaffold stairway (10) comprising two separate side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) and a plurality of separate stairway step elements (16), which are coupled to the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)), wherein holding devices are formed on both side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) for holding the stairway step elements (16), wherein the holding devices are provided in the form of grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) comprising groove walls (96a, 96b) per groove (18; 18^(I); 18^(II)) or groove-wall portions (60a, 60b) per groove (18^(III); 18^(IV)) formed from groove portions (59a - 59d) on side faces (19) of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) which face one another and are designed as hollow profiles (43; 43^(I); 43^(II); 43^(III); 43^(IV)), into which grooves the stairway step elements (16) are inserted by their free ends (17), and the free ends (17) of the stairway step elements rest on the groove wall (96a, 96b) or the groove-wall portions (60a, 60b), wherein at least on the side faces (19) facing one another, in particular on the side faces (19) facing one another and the side faces (21) facing away from one another, of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) at least one protruding rib (44a-44s) is formed, in particular centrally, or regularly or irregularly spaced ribs (44a-44s) are formed in the longitudinal direction of the respective side rail (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) which comprises/comprise the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV); 82) or groove portions (59a-59d), wherein the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) in the at least one rib (44a - 44s) or the ribs (44a - 44s) are formed in the form of cut-outs, wherein the depths of the cut-outs or grooves in the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) are limited and are either defined by a rib height (49) of the at least one rib (44a - 44s) or end at the level of channels (48a - 48c) between the ribs (44a - 44s) of the hollow profile, characterized in that the side rails (12, 14; 12(1), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) at the level of the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) comprise first stops (61) for the stairway step elements (16), such that the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) are slid onto the stairway step elements (16) without the stairway step elements (16) projecting beyond the side faces (21) facing away from one another of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)), and without the stairway step elements (16) projecting through the side faces (21) facing away from one another of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)).
2. Scaffold stairway according to claim 1, characterized in that the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) are oriented in parallel.
3. Scaffold stairway according to any of the preceding claims, characterized in that between each groove (18; 18^(I); 18^(II); 18^(III); 18^(IV)) and the longitudinal edges (52a, 52b; 52a^(I), 52b^(I); 52a^(II), 52b^(II); 52a^(III), 52b^(III); 52a^(IV), 52b^(IV)) of the respective side rail (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) the same angle is formed, which angle in particular matches a gradient angle (20) of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)).
4. Scaffold stairway according to any of the preceding claims, characterized in that the distances from the ends (77) of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) at which the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) are formed in the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) are correspondingly identical on both side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)), such that the stairway step elements (16) can be inserted horizontally into the grooves (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)).
5. Scaffold stairway according to any of the preceding claims, characterized in that the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) comprise a hollow profile (43; 43^(I); 43^(II); 43^(III); 43^(IV)) or a foam filling in the interior of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) formed as hollow profiles.
6. Scaffold stairway according to any of the preceding claims, characterized in that the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) comprise openings (66), in particular for rivets or bolts, at the level of the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) on the side faces (21) facing away from one another.
7. Scaffold stairway according to any of the preceding claims, characterized in that a groove (82) is formed at the level (83) of each of the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) formed closest to the ends of the side rails in parallel with these grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) on the side faces (21) of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) facing away from one another.
8. Scaffold stairway according to any of the preceding claims, characterized in that a first rib (44a - 44s) is formed on a first longitudinal edge (52a, 52b; 52a^(I), 52b^(I); 52a^(II), 52b^(II); 52a^(III), 52b^(III); 52a^(IV), 52b^(IV)) and a second rib (44a-44s) is formed on a second longitudinal edge (52a, 52b; 52a^(I), 52b^(I); 52a^(II), 52b^(II); 52a^(III), 52b^(III); 52a^(IV), 52b^(IV)).
9. Scaffold stairway according to any of claims 1 to 8, characterized in that several hollow chambers (92a, 92b) are formed in at least one side rail (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)).
10. Scaffold stairway according to any of the preceding claims, characterized in that the stairway step elements (16) comprise hook-shaped tabs (62), in particular comprising openings (66) into which bolts or rivets can be inserted.
11. Scaffold stairway according to any of the preceding claims, characterized in that the side rails have a gradient angle (20) from 30° to 55°.
12. Scaffold stairway according to any of the preceding claims, characterized in that the scaffold stairway (10) is produced from light metal, in particular aluminum.
13. Scaffold stairway (10) according to any of the preceding claims made, wherein the scaffold stairway is made of metal, plastics material or carbon-fiber composite material.
14. Scaffold stairway (10) according to claim 13, characterized in that the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV)) formed on the side faces facing one another, in particular on the side faces facing one another and the side faces facing away from one another, of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) are open at at least one end.
15. Stairway arrangement comprising a scaffold stairway according to any of the preceding claims and a platform (22, 24) arranged on the scaffold stairway (10), which in particular can be detachably fixed, in particular a platform (22, 24) arranged on each end (77) of the scaffold stairway (10).
16. Stairway arrangement according to claim 15, characterized in that the platform (22, 24) comprises two slots (70a, 70b) and/or two profile rails (74a - 74f), into each of which a side rail (12, 14) of the scaffold stairway (10) can be inserted, wherein the slots (70a, 70b) and/or the profile rails (74a-74f) in particular each comprise a second stop (72a, 72b) for the side rails.
17. Stairway arrangement according to claim 16 in conjunction with any of claims 11 to 14, characterized in that the walls (78a, 78b) of each slot (70a, 70b) and/or each profile rail (74a - 74f) comprise two tongues (80a, 80b) that are opposite one another, wherein each tongue (80a, 80b) can be inserted into a respective one of the grooves (18; 18^(I); 18^(II); 18^(III); 18^(IV), 82) which are formed closest to the ends (77) of the side rails (12, 14; 12^(I), 14^(I); 12^(II), 14^(II); 12^(III), 14^(III); 12^(IV), 14^(IV)) on one side face (19, 21) in each case.
18. Stairway arrangement according to any of claims 16 or 17, characterized in that the slots (70a, 70b) and/or profile rails (74a-74f) comprise openings, into which bolts or rivets can be inserted.

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