ES2664079T3 - Scaffolding ladder device - Google Patents

Abstract

Stair ladder device (10) for scaffolding, especially to guarantee a possibility to get on / off in the area between the scaffold between floors, with - two ladder beams (12) arranged parallel to each other, - some steps (14) connected and spaced parallel in the longitudinal direction between the ladder beams (12), - a respective suspension hook device (20) with a hook unit (40) which is arranged in the upper end area of the ladder beams (12) and with which a profiled scaffolding construction unit (60) can be embraced by zones, - - the suspension hook device (20) presenting a lateral opening (26) followed by an internal contour, - - presenting the contour inside, starting at the free terminal area of the tip (41) of the hook unit (40) inwards, a first straight inner edge contour area (42), a second straight inner edge contour area (43), which it follows at a right angle the first straight inner marginal contour zone (42), a third straight inner marginal contour zone (44) and a fourth inner marginal contour zone (45), which follows the third inner marginal contour zone (44), and a fifth inner marginal contour zone (46), - characterized in that - the third inner marginal contour zone (44) follows the second inner marginal contour zone (43) and is arranged displaced outwards with respect to of the second inner marginal contour zone (43), so that the plane of the third inner marginal contour zone (44) has an outward displacement (V) with respect to the plane of the second inner marginal contour zone (43) , - the fourth inner marginal contour zone (45) is arranged essentially in the longitudinal direction of the suspension hook device (20) and - the fifth inner marginal contour zone (46) is arranged essentially in the direction Transverse ion (Q) of the suspension hook device (20).

Description

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DESCRIPTION

Floor ladder device for scaffolding TECHNICAL FIELD

[0001] The present invention relates to a floor ladder device for scaffolding, especially to ensure a possibility of raising / lowering in the passage area between scaffold floors, with two stair stringers arranged parallel apart, connected steps and parallel to each other in a longitudinal direction between the stair stringers, in each case a suspension hook device with a hook unit that is arranged in the upper end zone of the stair stringers and with which a profiled unit of construction of scaffolding, the suspension hook device having a lateral opening followed by an inner contour, presenting the inner contour, starting in the free end zone of the tip of the hook unit inward, a first marginal contour zone straight inside, a second zone of marginal contour straight inside, which follows at a right angle to the first straight inner marginal contour zone, a third straight inner marginal contour zone and a fourth inner marginal contour zone, which follows the third inner marginal contour zone, and a fifth inner marginal contour zone.

CURRENT STATE OF THE TECHNIQUE

[0002] By the publication of the applicant “Layher Blitz Gerüst®-System Technik-Broschüre, edition 01.12.2010, page 9”, a steel floor staircase device is known whose stringers have in the upper terminal area in each case a hook unit produced by a conformation of the ladder beam. The use of a steel floor ladder of this type in the applicant's well-known Blitz scaffolding system works very well. If steel stairs of this type are used in the applicant's AllroundGerüstsystem®, there are other geometric conditions in relation to the components of the scaffolding, so that the stairs of steel floors of this type are not exactly adapted to the use in this system.

[0003] From DE 10 2012 002 346 A1 a generic floor ladder device is known according to the introductory part of claim 1. The floor ladder device has a suspension hook device which, thanks to the existing geometry In its inner peripheral contour, it can be mounted / placed universally according to the rules of the art in various scaffolding profiles. This floor ladder device has proven effective during use in practice, but does not completely cover certain application cases when used in different scaffolding systems.

DESCRIPTION OF THE INVENTION

[0004] The present invention is based on the technical problem or the task of, starting from the already known generic floor ladder, to modify it so that it can be mounted without any problem in almost all current mounting situations of the most diverse systems Scaffolding In particular, a suspension in U-profiles, round tubes and rectangular tubes of different sizes should be possible. In addition, economical production and reliable reliable operation must be guaranteed.

[0005] The floor ladder according to the invention is given by the features of independent claim 1. The claims directly or indirectly dependent on independent claim 1 are aimed at advantageous configurations and refinements.

[0006] Accordingly, the floor ladder device according to the invention of the type mentioned at the beginning is distinguished in that the third inner marginal contour zone follows the second inner marginal contour zone and is disposed outwardly in relation to the inner contour of the second inner marginal contour zone, so that the plane of the third inner marginal contour zone has an outward displacement relative to the plane of the second inner marginal contour zone, the fourth inner marginal contour zone it is arranged essentially in the longitudinal direction of the

[0007] suspension hook device and there is a fifth inner marginal contour zone which is essentially arranged in the transverse direction of the suspension hook device.

[0008] With respect to an easy assembly, an especially advantageous configuration is distinguished in that the first and therefore also the second inner marginal contour zone are arranged inclined with respect to the longitudinal axis of the suspension hook device, in particular in An angle between 100 and 120 degrees. This geometric configuration guarantees an easy suspension process in the most diverse scaffolding profiles.

[0009] A particularly advantageous configuration, which further increases the possibilities of use of the floor ladder device according to the invention, is distinguished in that in the transition zone between the third and fourth interior marginal contour zone there is a contour of concave rounding, in particular with a rounding radius in a range of 3 to 10 millimeters, in particular 5 millimeters.

[0010] Preferably, the inner marginal contour of the suspension hook device forms, in its upper inner contour zone, an area with two planes that extend parallel to each other, presenting the transition between the third contour zone interior and the fourth interior contour zone an interior radius, so that an assembly situation can also be carried out without any problem in which the scaffolding component in which the floor ladder device is to be suspended has a radius

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relatively small This is the case, for example, in the already known Layher steel passage zone. To further enlarge the interior space formed by the inner peripheral contour of the suspension hook device and therefore guarantee trouble-free mounting conditions, an especially advantageous configuration is distinguished by the fact that the fifth inner marginal contour zone has an extension of concave contour at least by zones.

[0011] An advantageous configuration, which allows reliable reliable operation and easy assembly also in the most diverse scaffolding systems, is distinguished by the fact that the fourth inner marginal contour zone extends in a straight line.

[0012] A preferred refinement, which guarantees easy production, is distinguished by the fact that the outer marginal contour zone externally opposed to the fifth inner marginal contour zone has a convex contour extension, distinguishing alternatively and complementary a preferred configuration by that, in the transition zone between the fourth and the fifth inner marginal contour zone, a first connecting branch is formed in the longitudinal direction of the suspension hook device and, in the terminal area free of The fifth inner marginal contour zone is formed by a second connection branch that looks downwards and that is separated parallel to the first connection branch.

[0013] Since, according to a preferred embodiment, the internal separation between the first and the second connecting branch corresponds essentially to the external measurement of the ladder beam to be connected, the suspension hook device can be placed firstly, more or less easily in shape dragging during the establishment of the connection between the suspension hook device and the ladder beam, the connection can then be established, which preferably consists of weld seams.

[0014] In this context, in relation to easy and rational production, it has been especially advantageous to configure the suspension hook device so that in the left and right marginal zones, in the transverse direction of the suspension hook device, of the outer marginal contour zone is present in each case a flat stop surface whose width corresponds essentially to the thickness of the ladder wall, which is configured as a hollow profile.

[0015] To ensure reliable long-lasting operation, the suspension hook device is preferably configured as a steel component or as a casting component. Economical production is guaranteed if the steel component is configured as a laser cut component or as a die cut component. Especially preferred is the configuration of the suspension hook device as a plastic coated steel component.

[0016] Further advantages and characteristics of the invention are apparent from the features further indicated in the claims and from the following exemplary embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The invention will now be described and explained in more detail by means of the embodiment shown in the drawings. They show:

Figure 1, perspective representation of a floor ladder device with ladder beams and steps, an example of embodiment of a suspension hook device according to the invention being connected in the upper end zone of each ladder.

Figure 2a, schematic cross section through the suspension hook device shown in Figure 1,

Figure 2b, schematic side view (from the left) of the suspension hook device according to Figure 2a, Fig. 2c, schematic bottom view of the suspension hook device according to Figure 2a, and Figures 3 to 9, schematic side views or cross-sectional representation of the upper terminal area of the floor ladder device according to figure 1, with a suspension hook device according to figure 2a to figure 2c during use, that is to say in a suspended state in the different systems of scaffolding or different mounting situations.

EMBODIMENTS OF THE INVENTION

[0018] An exemplary embodiment of a floor ladder device 10 with a possible constructive configuration of a suspension hook device 20 is shown in the figures. According to Figure 1, the floor ladder device 10 has two stringers of ladder 12 separated in parallel, between which steps 14 connected in parallel in the longitudinal direction of the ladder struts 12 are connected. In the upper end zone of each ladder beam 12 a suspension hook device 20 is described, which is described by means of figures 2 to 9.

[0019] In Fig. 2a the suspension hook device 20 is shown in cross section. The longitudinal direction in relation to the cross-sectional representation is designated with the double arrow L, and the transverse direction that extends perpendicularly thereto is designated with the double arrow Q. The upper part is indicated by an O and the lower part It is indicated with a U.

[0020] The suspension hook device 20 has an interior space 16, which has a side opening 26 which in figure 2a is present in the left zone.

[0021] In the upper area, the suspension hook device 20 forms a hook unit 40. The interior contour of the interior space 16 presents in its geometry, starting at the tip 41 of the hook unit 40, the

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following areas of inner marginal contour: a first zone of straight interior marginal contour 42, which is followed at right angles by a second zone of inner marginal contour 43 that extends in a straight line. The second inner marginal contour zone 43 is followed by a third inner marginal contour zone 44, which also extends in a straight line and has a displacement V outward in relation to the plane of the second inner marginal contour zone 43.

[0022] The third inner marginal contour zone 44 is followed by a fourth inner marginal contour zone 45, which extends in the longitudinal direction L and has a rectilinear contour. Following the lower end zone of the fourth inner marginal contour zone 45, a fifth inner marginal contour zone 46 is arranged, which essentially extends in the transverse direction Q and which has a concave interior marginal contour in zones, which in Figure 2a ends in the left terminal zone in a zone of straight interior marginal contour 46.1. The straight inner marginal contour zone 46.1 is here essentially arranged parallel to the second or third inner marginal contour zone (43, 44).

[0023] In the transition zone between the second inner marginal contour zone 43 and the third inner marginal contour zone (44) a transition contour 47 is present, which is configured as a chamfer. In the transition zone between the third inner marginal contour zone 44 and the fourth inner marginal contour zone 45 a transition contour 49 is present, which has a concave rounding with a predetermined rounding radius.

[0024] On the outer side opposite below the fifth inner marginal contour zone 46 there is an outer marginal contour zone 48, which has a convex extension.

[0025] In the transition zone between the fourth inner marginal contour zone 45 and the fifth inner marginal contour zone 46 a first connecting branch 22 is formed which extends downward in the longitudinal direction L. In front, in the zone terminal of the fifth inner marginal contour zone 46, a second connecting branch 24 is formed that extends downward in the longitudinal direction L, that is to say that it is arranged parallel to the first connecting branch 22.

[0026] The internal separation A between the first and the second connecting branch 22, 24 corresponds essentially to the external measurement of the ladder beam 12, which in figure 2a is shown in strokes.

[0027] In the left and right terminal areas, in figure 2a, of the convex outer marginal contour zone 48 there is a flat left abutment surface 50 and a flat right abutment surface 51, the width of both surfaces corresponding to stop 50, 51 respectively essentially to the wall thickness of the ladder beam 12, which is configured as a hollow profile. In this way, it is possible, during the manufacture of the floor ladder device 10, to insert the ladder beam 12 in a form drag between the two connecting branches 22, 24 until its front side meets the stop surfaces 50, 51 In this state, the outer marginal contour zone 48 protrudes into the interior of the ladder beam 12. Once the ladder beam 12 has been introduced in the described position, welding beads 54 between the ladder beam can then be easily made during production. 12 and the connecting branches 22, 24.

[0028] The inner contour of the suspension hook device 20 is surrounded by an outer contour parallelly separated peripherally, so that in cross-section a component with an essentially uniform wall thickness results. The suspension hook device 20 is preferably configured as a steel component, the outer contour and the inner contour being advantageously and economically produced by laser or die cutting.

[0029] The width of the suspension hook device 20, that is to say seen perpendicularly to the plane of the leaf of Figure 2a, corresponds essentially to the free interior width of the ladder beam 12 configured as a rectangular hollow profile - as an example of embodiment-, so that, when connecting the suspension hook device 20 to the ladder beam 12, its inner hollow space is automatically closed frontally by the outer marginal contour zone 48 in combination with the abutment surfaces 50, 51 .

[0030] In the exemplary embodiment shown, the second inner marginal contour zone 43 and the third inner marginal contour zone 44, which is arranged parallel to the same, are arranged at an angle W of approximately 110 degrees. Thus, the first inner marginal contour zone 42, or the tip 41 of the hook unit 40, also extends inclined with respect to the longitudinal direction L, oriented from top to bottom towards the outside.

[0031] In a preferred embodiment, the length L1 of the third inner marginal contour zone 44 is between 10 and 20 millimeters and in particular is 16 millimeters, including the left and right transition contours 47, 49. The radius Rounding of the concave right transition contour 49 is preferably chosen so that it is in a range between 4 and 6 millimeters and in particular is 5 millimeters. The travel depth V between the second and third inner marginal contour zone 43, 44 is preferably in a range of 2 to 5 millimeters and in particular is approximately 2.6 millimeters. Preferably, the cross-sectional thickness of the different zones is approximately 10 millimeters.

[0032] In figures 3 to 9 the use of the floor ladder device 10 in different assembly situations is schematically represented. In Fig. 3, the suspension hook device 20 is suspended in a profiled 60.1 scaffolding construction unit that is configured as a round tube with a relatively large diameter, for example 48.3 millimeters. In this context, the outer contour of the round tube is supported linearly, perpendicular to the direction of the sheet, in the lower zone of the first inner marginal contour zone 42, by the upper part in the second inner marginal contour zone 43 and by the inner part in the fourth inner marginal contour zone 44.

[0033] Figure 4 shows the suspension of the suspension hook device 20 in a profiled 60.2 scaffolding construction unit that is configured as an upwardly opened U-profile. In this context, a

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U-profile rib rests on the third inner marginal contour zone 44, and the outer side of the hook unit 40 rests on the inner side of the opposite rib of the U-profile.

[0034] Figure 5 shows the suspension of the suspension hook device 20 or the floor ladder device 10 in a passage area with a hatch that opens laterally and with an integrated axis, which constitutes the profiled construction unit 60.3 of scaffolding, the profiled 60.3 scaffolding construction unit being configured with a relatively small diameter, for example 5 millimeters. The suspension is made here in the rounding contour zone 49 in the transition zone between the third inner marginal contour zone 44 and the fourth inner marginal contour zone 45.

[0035] Figure 6 shows the connection to a profiled 60.4 scaffolding construction unit that is configured as a rectangular hollow profile. This is the case, for example, in the passage zone in the well-known Layher Blitz scaffolding system. In this context, the suspension hook device 20 is supported with the second inner marginal contour zone 43 at the top of the rectangular hollow profile.

[0036] Figure 7 finally shows the suspension of the suspension hook device 20 in a profiled 60.5 scaffolding construction unit that is configured as a modified U-profile, as used in the Layher Allround scaffolding system. In this context, the suspension hook device 20 is supported with its second inner marginal contour zone 43 on the front side of the free nerve end zone of the profiled 60.5 scaffolding construction unit.

[0037] Figure 8 shows the use of the suspension hook device 20, or the floor ladder device 10, in the passage zone in a Layher Allround scaffolding system. Similarly to Figure 6, a rectangular hollow profile 60.6 is also present as a profiled unit 60.6 of scaffolding construction, however there is a relatively small separation between the rectangular hollow profile and the other scaffold support profiles, through the which can be introduced the hook unit 40, so that the upper side of the rectangular hollow profile constitutes the support for the second inner marginal contour zone 42.

[0038] Figure 9 finally shows the use of the suspension hook device 20 in a modified Layher Allround system, the profiled scaffolding construction unit 60.7 being configured as a laterally open U-profile. The second inner marginal contour zone 43 rests on the flange of the U-profile, at the top. The U-profile rib rests on the first inner marginal contour zone 42, and the upper flange extends to the fourth inner marginal contour zone 45.

[0039] In particular, the examples of Figures 3 to 9 show that the floor ladder device 10 according to the invention allows with its suspension hook device 20, thanks to the geometry described, in many cases an assembly according to the rules of the art in the most diverse assembly systems of different known scaffolding systems.

Claims (11)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Floor ladder device (10) for scaffolding, especially to ensure a possibility of getting on / off the passageway between scaffold floors, with - two stair stringers (12) arranged parallel apart, - steps (14) connected and separated parallel in the longitudinal direction between the stair rails (12), - a respective suspension hook device (20) with a hook unit (40) which is disposed in the upper terminal area of the ladder stringers (12) and with which a profiled unit (60) can be embraced by zones scaffolding construction, - - the suspension hook device (20) having a side opening (26) followed by an inner contour, - - presenting the inner contour, starting in the free end zone of the tip (41) of the hook unit (40) inwards, a first zone of straight inside marginal contour (42), a second zone of straight inside marginal contour (43), which follows at right angles to the first zone of straight inner marginal contour (42), a third zone of straight inside marginal contour (44) and a fourth zone of inner marginal contour (45), which follows the third inner marginal contour zone (44), and a fifth inner marginal contour zone (46), - characterized in that - the third inner marginal contour zone (44) follows the second inner marginal contour zone (43) and is disposed outwardly with respect to the second inner marginal contour zone (43), so that the plane of the third Inner marginal contour zone (44) has an offset (V) outward from the plane of the second inner marginal contour zone (43), - the fourth inner marginal contour zone (45) is arranged essentially in the longitudinal direction of the suspension hook device (20) and - the fifth inner marginal contour zone (46) is essentially arranged in the transverse direction (Q) of the suspension hook device (20). 2. Floor ladder device according to claim 1, characterized in that the first and therefore also the second inner marginal contour zone (42, 43) are arranged inclined with respect to the longitudinal axis (L) of the hook device of suspension (20), in particular at an angle (W) between 100 and 120 degrees. 3. Floor staircase device according to claim 1 or 2, characterized in that in the transition zone between the third and fourth inner marginal contour zone (44, 45) there is a concave rounding contour (49), in particular with a rounding radius in a range of 3 to 10 millimeters, in particular 5 millimeters. 4. Floor ladder device according to one or more of the preceding claims, characterized in that the fifth inner marginal contour zone (46) has a concave contour extension at least by zones. 5. Floor ladder device according to claim 1, characterized in that the fourth contour zone Inner marginal (45) extends in a straight line. 6. Floor ladder device according to one or more of the preceding claims, characterized in that the outer marginal contour zone (48) externally opposed to the fifth inner marginal contour zone (46) has a convex contour extension. 7. Floor ladder device according to one or more of the preceding claims, characterized in that, in the transition zone between the fourth and fifth inner marginal contour zone (45, 46), it is formed, in the longitudinal direction ( L) of the suspension hook device (20), a first connecting branch (22) that faces downwards and, in the free end zone of the fifth inner marginal contour zone (46), a second connecting branch is formed (24) that looks down and that is separated parallel to the first connecting branch (22). 8. A floor ladder device according to claim 7, characterized in that the internal separation (A) between the first and the second connecting branch (22, 24) corresponds essentially to the external measurement of the connected ladder beam (23) . 9. Floor ladder device according to claim 6, characterized in that in the left and right marginal zones, in the transverse direction (Q) of the suspension hook device (20), of the outer marginal contour zone (48) there is a respective flat stop surface (50, 51) whose width corresponds respectively essentially to the thickness of the wall of the ladder beam (12), which is configured as a hollow profile. 10. Floor ladder device according to claim 7 to 9, characterized in that the first and the second connecting branch (22, 24) are connected to the ladder beam (12) by welding strands (54). A floor ladder device according to one or more of the preceding claims, characterized in that, the suspension hook device (20) is configured as a steel component or a cast iron component, in particular laser cut or die cut. 12. A floor ladder device according to claim 11, characterized in that the hook device of Suspension (20) is configured as a plastic coated steel component.