Connecting element for a scaffold system for mounting a scaffold railing bar

Abstract

The invention relates to a connecting element (10) for mounting on an existing scaffold system, having a main body (11) with a vertical direction (H), a transverse direction running perpendicular to the vertical direction (H) and a circumferential direction (U), and having at least one first connecting unit (12) connected to the outside of the main body (11) for a separable connection of a first scaffold railing tube, wherein the main body (11) can be separably connected to a scaffold tube profile bar of a scaffolding or construction safety railing in the region of a second connecting unit connected to the scaffold tube profile bar for a separable connection of a second scaffold tube profile bar, characterized in that the main body (11) is designed as a tube profile unit with recesses (14, 16) formed in the wall of the main body (11) in such a manner that the connecting element (10) can be pushed onto the scaffold tube profile bar and can be connected or separably fixed to the second connecting unit of the scaffold tube profile bar.

Description

TECHNICAL AREA

[0001] The following invention relates to a connection device for mounting on an existing scaffolding system with a base body having a vertical direction, a transverse direction perpendicular to the vertical direction and a circumferential direction with at least one first connection unit connected to the outside of the base body for the detachable connection of a first scaffolding railing post, wherein the base body can be detachably connected to a scaffolding tube profile post of a scaffolding / assembly safety railing in the area of ​​a second connection unit connected to the scaffolding tube profile post for a detachable connection of a second scaffolding railing post. STATE OF THE ART

[0002] Current regulations in scaffolding construction require the use of assembly safety guardrails (ASGs) during the erection of a scaffolding system to ensure assembly safety. The assembly safety guardrail is installed from an existing lower scaffold level and ensures that guardrails are already in place on the level above, which is yet to be erected. This guarantees the safety of the erection personnel when accessing the upper scaffold level. Such ASGs are also known as leading guardrails and are described, for example, in EP 1 571 275 B1 or EP 1 338 723 B1.

[0003] The vertical guardrail posts of the assembly safety railing are detachably connected to the existing vertical scaffold tube profile bars of the scaffolding system. These vertical scaffold tube profile bars have a second connection unit at their upper end, to which a second scaffold guardrail bar is already detachably attached during assembly.

[0004] In practice, a situation arises where an additional guardrail post must be connected in a corner of the assembly safety railing to ensure safety in that section of the scaffold. Therefore, an additional connection point for another guardrail post is required.

[0005] A connection device for a scaffold guardrail post is known, comprising a pipe coupling as its base body with an externally molded connection unit for the scaffold guardrail post. However, this connection cannot be directly aligned with the scaffold guardrail post of the assembly safety railing, as a flush connection is not possible due to the existing connection unit for the scaffold guardrail post of the assembly safety railing. This connection device must therefore be mounted either above or below the position of the existing scaffold guardrail post of the assembly safety railing, meaning that the prescribed height positions for scaffold guardrail posts cannot be maintained, particularly in corner areas.

[0006] Furthermore, the patents JP H05 54743 U, US 6 062 341 A and DE 10 2009 018 436 A1 are known from the prior art. PRESENTATION OF THE INVENTION

[0007] Based on the aforementioned prior art, the present invention is based on the objective or technical problem of providing a connection device for subsequent assembly on an existing scaffolding system with assembly safety railing (MSG), which is economically manufacturable, easy to connect in terms of assembly technology and enables an additional connection option for another scaffolding railing bar in the required height position, in particular in the corner area.

[0008] The connection device according to the invention of the type mentioned at the outset is defined by the features of independent claim 1. Advantageous embodiments and further developments are characterized by the features of the claims directly or indirectly dependent on independent claim 1.

[0009] The connection device according to the invention is characterized in that the base body is designed as a tubular profile unit with recesses in the wall of the base body, such that the connection device can be slid onto the scaffold tubular profile bar, in particular in the vertical direction, and can be connected / detachably fixed to the second connection unit of the scaffold tubular profile bar, in particular by rotation about the vertical direction.

[0010] This design according to the invention makes it easy to mount the connection device on the scaffold tube profile bar of the assembly safety railing in existing scaffolding systems with mounted assembly safety railings, thus providing a connection for a further scaffold railing bar, particularly for a corner area. Optionally, the first scaffold railing bar in the corner area can be connected on the outside or inside.

[0011] According to the invention, a first wall recess is provided on the underside of the wall of the base body, with a first circumferential width and a first height, adjoining a second wall recess in the height direction, with a second circumferential width and a second height, wherein the second circumferential width of the second wall recess is larger than the first circumferential width of the first wall recess.

[0012] A particularly simple design of the connection device according to the invention, which ensures high functionality, is characterized by the fact that, through the formation of the first and second wall recesses, the base body has a first annular contour area that is closed on the upper side and a second contour area that is essentially open in a U-shape on the lower side, and both contour areas are integrally connected to each other via a contour web area.

[0013] In order to implement the geometric requirements for the arrangement of further scaffold railing bars, a particularly advantageous design is characterized by the fact that the first connection unit is formed on the outside of the contour web area in the transverse direction, wherein a particularly advantageous design, which ensures extremely simple assembly, is characterized by the fact that the circumference of the first wall recess and the height of the second wall recess are larger than the dimensions of the maximum outer contour of the second connection device.

[0014] A preferred embodiment with regard to simple assembly of the connection of the scaffold railing post is characterized by the fact that the first connection unit is designed as a toggle pin unit with a projection unit with an outwardly open slot in which a toggle pin is rotatably mounted about a pivot axis.

[0015] The connection device can be made of steel, aluminum, or plastic.

[0016] A scaffolding system according to the invention with vertical scaffold tubes, wherein a mounting safety railing, also called a leading railing, is connected to the vertical scaffold tubes, which has scaffold tube profile bars connected to the vertical scaffold tubes of the scaffolding system, each of which has a second connection unit with a detachably connected second scaffold railing bar in its upper end region, is characterized in that a connection device of the type described above is provided, which is pushed onto the upper end region of a scaffold tube profile bar and detachably connected to the second connection unit.

[0017] A particularly preferred embodiment of a scaffolding system according to the invention is characterized in that the arrangement of the first connection unit of the connection device, when connected to the scaffold tube profile bar, is connected at right angles to the second connection unit of the scaffold tube profile bar when viewed from above. This ensures that, even in the corner area, a scaffold guardrail bar can be connected in both directions of the corner area at the prescribed height, with the additional first scaffold guardrail bar being able to be connected either on the outside or on the inside, depending on the arrangement of the connection device.

[0018] A proven and particularly advantageous, economical scaffolding system that ensures easy assembly and permanently reliable operation is characterized by the fact that the scaffolding system is designed as a Layher Blitz Scaffolding® system or Layher Allround Scaffolding® system with an attached assembly safety railing using scaffolding tubular profile bars. The scaffolding system can be configured in other ways.

[0019] Further embodiments and advantages of the invention become apparent from the features further listed in the claims and from the exemplary embodiments given below. The features of the claims can be combined with one another in any way, provided they are not obviously mutually exclusive. BRIEF DESCRIPTION OF THE DRAWING

[0020] The invention, as well as advantageous embodiments and further developments thereof, are described and explained in more detail below with reference to the examples shown in the drawing. The features that can be derived from the description and the drawing can be applied individually or in any combination according to the invention. The drawing shows: Fig. 1, 2 different schematic perspective views of a connection device for subsequent mounting on a scaffold tube profile bar for connecting a scaffold guardrail bar, Fig. 3 schematic side view of the connection device according to Fig. 1 , Fig. 4 schematic front view of the connection device according to Fig. 1 , Fig. 5 schematic top view of the connection device according to Fig. 1Fig. 6 Schematic detail perspective of a connection device attached to a scaffold tube profile bar in the corner area, with another scaffold guardrail bar attached on the inside, Fig. 7 Schematic detail perspective of a connection device attached to a scaffold tube profile bar in the corner area, with another scaffold guardrail bar attached on the outside, Figs. 9 to 13 Schematic perspective views of different scaffold structures of a Layher Blitz Scaffold® system with connection of an assembly safety guardrail (leading guardrail) with scaffold tube profile bars using the connection device according to the Figures 1 to 7, which is connected to a scaffold tube profile bar in different assembly states and Fig. 14,15 schematic representation of a scaffold construction according to the Layher AllroundGerüst® system with connected assembly safety railing with scaffold tube profile bars using a connection device according to the Figures 1 to 7 , which is connected to a scaffold tube profile bar, is in different assembly states. WAYS TO IMPLEMENT THE INVENTION

[0021] In the Figures 1 to 5 is an embodiment of a connection device 10 for subsequent mounting on a scaffold tube profile bar of a scaffold or a mounting safety railing (MSG) to enable the connection of another scaffold railing bar.

[0022] The connecting device 10 has a tubular profile-like base body 11, in the underside of whose wall a first wall recess 14 with a circumferential width U1 and a height H1 is provided, to which a second wall recess 16 with a height H2 and a circumferential width U2 adjoins in the vertical direction H.

[0023] The altitude direction is in Fig. 1 The double arrow H represents the transverse direction, the double arrow Q represents the transverse direction, and the double rotation arrow U represents the circumferential direction. Through these two recesses 14, 16, the wall of the base body 11 forms a closed circular ring contour 20 on the upper side and a U-shaped circular ring contour open in the transverse direction on the lower side, with both contours 20, 22 being integrally connected to each other via a web contour 24.

[0024] A first connection unit 12 is attached to the outside of the web contour 14, in particular by welding. This unit has a projection 26 extending in the transverse direction Q, in which an outwardly open slot 28 is arranged at the front end. A toggle pin 29 is located in this slot and is rotatably mounted on the projection 26 via a pivot axis 27 extending perpendicular to the transverse direction Q. Such a connection unit 12 has long been known as a connection device for balusters and has proven its worth in practice.

[0025] In Fig. 6Figure 1 shows a detailed perspective of a connection device 10 attached to a scaffold tube profile bar 50. The scaffold tube profile bar 50 is, for example, a component of an assembly safety railing, which is described, for example, in EP 1 571 275 B1 or EP 1 338 723 B1. In this case, the scaffold tube profile bar 50 has a second connection unit 52 welded to its upper end, which in this embodiment is also designed as a toggle pin connection unit. A second scaffold railing bar 54 is connected to this second connection unit 52 via a connection bracket 56 with a continuous recess 58. For connection, the toggle pin 29 is pivoted into a horizontal position and the connection bracket 56 with its recess 58 is slid over the projection unit 26, whereby the toggle pin 29 then falls into a vertical position due to the effect of its own weight.

[0026] Since the scaffold tube profile bar 50 has only one connection unit 52, connecting a further first scaffold guardrail bar 18 at the same height is not possible. This is where the connection device 10 according to the invention comes into play. During assembly, it is first pushed onto the scaffold tube profile bar 50 from above in the vertical direction H, so that the projection unit 26 of the second connection unit 52 penetrates the first wall recess 14 up to the area of ​​the second wall recess 16. Subsequently, the connection device 10 is rotated in the circumferential direction U, so that the connection device 10 is secured against displacement in the vertical direction H both upwards and downwards by the inner contour of the second wall recess 16.

[0027] The circumference U1 of the first wall recess 14 and the height H2 of the second wall recess 16 are chosen to be larger than the maximum outer dimension of the projection unit 26 of the second connection unit 52. The inner diameter of the base body 11 of the connection device 10 is chosen to be slightly larger than the outer diameter of the scaffold tube profile bar 50. After mounting the connection device 10, a first scaffold guardrail bar 18 can be easily mounted on its first connection unit 12 at right angles to the second scaffold guardrail bar 54 at the same height. Fig. 6 The diagram shows the assembly situation in which the first scaffold railing bar 18 is connected on the inside in the corner area.

[0028] Fig. 7 shows a detailed perspective view of a connected connection device 10, similar to that in Fig. 6, however, with the difference that the first scaffold railing bar 18 is connected to the scaffold tube profile bar 50 on the outside in the corner area.

[0029] The Figures 8 to 10 Figure 1 shows a scaffold frame 70 of the known Layher Blitz Scaffold® system using the connection device 10 according to the invention. The scaffold frames 70 have two parallel, spaced-apart vertical scaffold tubes 62, which are rigidly connected to each other in the upper end region via a crossbar 66 and are connected to each other in the lower end region via a cross profile 68.

[0030] In Fig. 8A scaffold tube profile bar 50 is detachably connected to the front vertical scaffold tube 62 of the scaffold frame 70, which faces the viewer, via connection units 72.1, 72.2. At its upper end, the scaffold tube profile bar 50 has a second connection unit 52. As described above, the connection device 10 is attached to this second connection unit 52, which provides the first connection unit 12 for attaching another scaffold guardrail bar.

[0031] The Fig. 9 shows the status of a connected second scaffold guardrail bar 54 to the second connection unit 52 of the scaffold tube profile bar 50.

[0032] Fig. 10 . shows the further connection of the first scaffold guardrail bar 18 to the first connection unit 12 of the connection device 10, wherein the first and second scaffold guardrail bars 18, 54 are arranged at right angles to each other at the same height level.

[0033] In the Fig. 10 In the depicted state, the scaffold tube profile bar 50 of the assembly safety railing can be detached from the scaffold tube 52 and offset upwards in the vertical direction H and connected, so that securing scaffold railing bars 18, 54 are already available for the scaffold level to be mounted above it.

[0034] The Figures 11 to 13Figure 1 shows various assembly states of a scaffold 60.1, partially in the corner area, which is designed as the well-known Layher Blitz Scaffold® system using scaffold frames 70. Scaffold tube profile bars 50 of an assembly safety railing are already mounted to the inner vertical scaffold tubes 62 of the scaffold frames 70. The scaffold tube profile bars 50 are connected to the right and left vertical scaffold tubes 62 of the left and right scaffold frames 70 in an upwardly shifted position. The scaffold tube profile bar 50 located in the inner area is still connected to the vertical scaffold tube 62 in the area of ​​the lower scaffold level. The connection device 10 is mounted on the upper side of this scaffold tube profile bar 50, so that the first scaffold railing bar 18 can be connected, or is connected, at a right angle to the second scaffold railing bar 54. Fig. 11The situation is shown from an interior viewpoint. Fig. 12 The next assembly step for the scaffolding is according to Fig. 11 shown in which the inner scaffold tube profile bar 50, arranged in the corner area, is shifted upwards in the height direction H and is connected to the vertical scaffold tube 52 of the scaffold frame 70.

[0035] Fig. 13 shows the same assembly situation as Fig. 12 , however, from an external perspective.

[0036] It should also be noted that the first and second scaffold guardrail bars 18, 54 must be telescopically designed to allow for the individual assembly states, in particular when moving the assembly safety guardrail from a lower scaffold level to a scaffold level above.

[0037] Fig. 14Figure 60.2 shows the use of the connection device in a scaffolding system 60.2, which is designed as a Layher AllroundGerüst® system, with stackable scaffold tubes 64 that have rosettes spaced apart in the vertical direction H for connecting further components. The figure shown in Figure 60.2 illustrates the use of the connection device in a scaffolding system 60.2, which is designed as a Layher AllroundGerüst® system, with stackable scaffold tubes 64 that have rosettes arranged at intervals in the vertical direction H for connecting further components. Fig. 14 The scaffold 60.2 shown consists of a square scaffold tower in each of its four corners, with vertically stacked scaffold tubes 64. A scaffold tube profile bar 50 of a mounting safety railing is connected to each scaffold tube. A connection device 10, as described above, is mounted on the upper end of each scaffold tube profile bar 50. Fig. 14 The figure shows an assembly state in which three scaffold tube profile bars 50 are already connected in one position, so that the guardrail bars 18, 54 are present in a scaffold level to be assembled above.

[0038] Only the front scaffold tube profile bar 50, facing the viewer, is still connected to the vertical scaffold tube 64 of the lower scaffold level. At each corner point, a first and second scaffold guardrail bar 18, 54 are connected to the scaffold tube profile bar 50, with the second scaffold guardrail bar 54 being connected via the second connection unit 52 of the scaffold tube profile bar 50 and the first scaffold guardrail bar 18 being connected via the connection unit 12 of the connection device 10, the scaffold guardrail bars 18, 54 being perpendicular to each other when viewed from above.

[0039] The Fig. 15 The assembly situation is shown, starting from the Fig. 14, in which the front scaffold tube profile bar 50 facing the viewer is connected upwards to the vertical scaffold tube 64 pushed over it, so that in this state a continuous railing with first and second scaffold railing bars 18, 54 is present, with all scaffold railing bars 18, 54 being arranged at the same height level.

Claims

1. Connection device (10) for fitting to an existing scaffolding system (60), having a main body (11), which has a height direction (H), has a transverse direction extending perpendicularly to the height direction (H) and has a circumferential direction (U), having at least one first connection unit (12), which is connected to the outside of the main body (11) and serves for releasable connection of a first scaffold-railing bar (18), wherein the main body (11) is releasably connectable to a tubular-profile scaffold bar (50) of a scaffold / assembly safety railing (MSG) in the region of a second connection unit (52), connected to the tubular-profile scaffold bar (50), for releasable connection of a second scaffold-railing bar (54), wherein - the main body (11) is in the form of a tubular-profile unit, with cutouts (14, 16) provided in the wall of the main body (11), in such a way that the connection device (10) is pushable onto the tubular-profile scaffold bar (50) and is connectable / releasably fixable to the second connection unit (52) of the tubular-profile scaffold bar (50), wherein, - in the wall of the main body (11), - - a first wall cutout (14) having a first circumferential width (U1) and a first height (H1) is provided at the bottom side, characterized in that, in the wall of the main body (11), - - a second wall cutout (16) adjoining the first wall cutout (14) in the height direction (H) and having a second circumferential width (U2) and a second height (H2) is provided, - - wherein the second circumferential width (U2) of the second wall cutout (16) is greater than the first circumferential width (U1) of the first wall cutout (14), wherein, - as a result of the formation of the first and second wall cutouts (14, 16), the main body (11) has a first, annular contour circumferential region (20), which is circumferentially closed, at the top side and a second contour circumferential region (22), which is open in a substantially U-shaped manner, at the bottom side, and the two contour circumferential regions (20,22) are connected to one another in one piece via a contour web region (24).

2. Connection device according to Claim 1, - characterized in that - the first connection unit (12) is formed integrally on the outside of the contour web region (24) in the transverse direction (Q).

3. Connection device according to either or both of the preceding claims, - characterized in that - the circumferential width (U1) of the first wall cutout (14) and the height (H2) of the second wall cutout (16) are greater than the dimensions of the maximum outer contour of the second connection device (52).

4. Connection device according to one or more of the preceding claims, - characterized in that - the first connection unit (12) is in the form of a tilting-pin unit with a projection unit (26) having an outwardly open slot (28) in which a tilting pin (29) is mounted so as to be rotatable about an axis of rotation (27).

5. Connection device according to one or more of the preceding claims, - characterized in that - the components of the connection device consist of steel, aluminium or plastic.

6. Scaffolding system (60) having vertical scaffold tubes (62), wherein the vertical scaffold tubes (62) have connected thereto an assembly safety railing, also referred to as a lead railing, which has tubular-profile scaffold bars (50) connected to the vertical scaffold tubes (62) of the scaffolding system (60) and in each case having in their upper end region a second connection unit (52) with a releasably connected second scaffold-railing bar (24), - characterized in that - a connection device according to one or more of the preceding claims that is pushed onto the upper end region of a tubular-profile scaffold bar (50) and is releasably connected to the second connection unit (52) is provided.

7. Scaffolding system according to Claim 6, - characterized in that - the arrangement of the first connection unit (12) of the connection device (10) in the state connected to the tubular-profile scaffold bar (50) is, when seen in plan view, provided at a right angle in relation to the second connection unit (52) of the tubular-profile scaffold bar (50).

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