Guardrail, scaffolding, method for erecting scaffolding and use of a guardrail in scaffolding

Description

[0001] This application claims priority from German patent application No. 10 2021 109 947.1, filed on April 20, 2021.

[0002] The invention relates to a railing post for a scaffold and to a scaffold with a railing post according to the invention. Furthermore, the invention relates to a method for erecting a scaffold and the use of a railing post according to the invention in a scaffold.

[0003] The term "scaffolding" can refer in particular to a modular or frame scaffolding. Technical background

[0004] Modular and frame scaffolding systems consist of prefabricated, standardized scaffolding components that enable rapid assembly and disassembly, for example, when scaffolding a building facade. Frame scaffolding systems feature prefabricated vertical and horizontal frames. Modular scaffolding systems consist of individual vertical uprights and horizontal ledgers that can be assembled into complex surface or room scaffolds using standardized connecting elements and / or connection nodes. Since scaffolding systems typically comprise multiple scaffolding levels, fall protection in the form of railings is provided. If the scaffolding is still under construction, there is no fall protection until the railing is installed.

[0005] The state of the art has therefore already proposed demountable scaffolds with a so-called "leading railing." With a leading railing, the railing of the next scaffold level is erected from the level below, before the flooring. When the flooring is installed, the fall protection is already in place. This increases safety when erecting a scaffold with multiple levels.

[0006] A method for assembling and disassembling a demountable facade scaffold, in which the railing is designed as a leading railing, is exemplified by published patent application DE 196 33 092 A1. To assemble a railing element belonging to a scaffold level to be erected ahead of the floor slabs of the scaffold level to be erected, it is coupled at one end to an already assembled support element in the area of ​​the scaffold level to be erected, and at the other end to another support element that has not yet been assembled. During the assembly of the additional support element, the railing element is then pivoted into a horizontal position and thus brought into its final position.

[0007] German Patent Application DE 101 11 976 A1 discloses, by way of example, a method for attaching multiple railing elements to a scaffolding level. The railing elements have engagement means at their ends for engaging a rosette connected to a vertical support. These engagement means are designed as hooks or claws, allowing the railing elements to pivot relative to the vertical support with the rosette by engaging a rosette on one side. The rosette defines the attachment position of the railing elements.

[0008] From the published patent application JP2006226001 a railing post according to the preamble of claim 1 is known.

[0009] The present invention is based on the object of simplifying the assembly and disassembly of a guardrail during the erection and dismantling of a scaffold. At the same time, suitable coupling means should ensure that the guardrail cannot be disassembled easily in its installed position, i.e., in its final position of use, but only gradually during the dismantling of the scaffold.

[0010] To achieve this object, the railing beam with the features of claim 1 and the scaffolding with the features of claim 7 as well as the method for erecting a scaffolding with the features of claim 11 are proposed. Furthermore, a preferred use of a railing beam according to the invention in a scaffolding is specified. Disclosure of the invention

[0011] A railing post for a scaffold is proposed, which has a coupling section at at least one end for coupling to a coupling element of a vertical post or vertical frame of the scaffold. The coupling section is flat and is penetrated by an elongated opening running parallel to a longitudinal axis of the railing post, which has a constant width up to an end extension.

[0012] The railing stile can be connected to a coupling element of a vertical post or vertical frame by hooking it into the opening in the coupling section. The extended end section simplifies the hooking or threading of the coupling element into the opening of the coupling section.

[0013] Furthermore, due to the different widths of the opening, a positive connection can be achieved between the coupling section of the railing post and a coupling element of a vertical post or vertical frame. However, this requires that the coupling element of the vertical post or vertical frame has a bead-like projection, for example, a mushroom-shaped one. In this case, the coupling element forms an undercut area that can be engaged behind by the coupling section of the railing post. The coupling section is then hooked in via the end-side extension of the opening, which for this purpose is preferably led to a side edge of the coupling section or has dimensions that are adapted to the dimensions of the bead-like projection. The coupling section thus reaches behind the bead-like projection of the coupling element when hooked in.The positive connection is then achieved by displacing the coupling section relative to the coupling element so that the coupling section engages behind the bead-like projection. The width of the opening is preferably adapted to the width or diameter of the coupling element beyond the bead-like projection.

[0014] The positive connection between the coupling section of the railing post and the coupling element of the vertical post or vertical frame prevents the railing post from being removed in its final or use position. To remove it, the railing post must first be moved again, which is not possible as long as the railing post is coupled to two mounted vertical posts or vertical frames.

[0015] The elongated opening of the coupling section makes it possible to move the railing post relative to a coupling element of a vertical post or vertical frame. Since the opening extends parallel to the longitudinal axis of the railing post, the railing post is moved longitudinally. The railing post can be aligned horizontally or diagonally. Depending on the specific design of the coupling element, in addition to moving it, twisting and / or pivoting may also be necessary to transfer the railing post to its final or use position.

[0016] In the top view of the coupling section, the elongated opening and / or the end extension of the opening is / are preferably located centrally relative to the longitudinal axis of the railing post. The longitudinal axis of the railing post thus simultaneously forms the longitudinal axis of the opening and / or the extension. This simplifies the manufacture of the railing post. Furthermore, no axial offset needs to be considered when erecting the scaffold.

[0017] To create a railing, the suggested railing post is mounted at the height specified for fall protection. However, the suggested railing post can also be used to create knee rails. To do so, simply mount the railing post at knee rail height.

[0018] According to the invention, the end extension is arranged at the end of the opening facing away from the railing post. The end facing away from the railing post is the outer end of the opening. At the inner end, or end facing the railing post, the opening therefore has a width that is smaller than the width of the extension. After being hooked in, the railing post is moved in such a way that the coupling element moves from the extended outer end to the inner end of the opening, which is not extended.

[0019] It is further proposed that the opening be widened on both sides. This means that the end extension extends on both sides of the opening. The extension can, in particular, be arranged symmetrically to the opening. Preferably, the opening and the extension are mirror-symmetrical with respect to the longitudinal axis of the railing post.

[0020] With a symmetrical arrangement of the extension, it cannot extend to a side edge of the coupling section. The coupling section cannot be hooked directly behind a bead-like projection of a coupling element, but must first be guided over the bead-like projection. The size and shape of the end extension is therefore preferably adapted to the size and shape of the bead-like projection.

[0021] Preferably, the coupling element of the vertical post or vertical frame has a circular cross-sectional shape, since this enables the railing bar to be pivoted easily around the coupling element.

[0022] In the plan view of the coupling section, the end extension of the opening is rounded, in particular circular or partially circular.

[0023] The rounded shape of the end extension also helps ensure that the railing can be easily pivoted around the coupling element.

[0024] Regardless of the specific design and arrangement of the end extension, it is therefore recommended that the outer end of the opening be rounded, particularly circular or partially circular. This ensures easy pivoting of the railing post. This is particularly advantageous when creating a forward-extending railing, as the railing post is pivoted to transfer it into its operating position.

[0025] Depending on the specific design of the coupling section and / or the coupling element, the railing post must not only be pivoted but possibly also rotated during assembly. This is particularly the case if the end extension of the opening does not extend to a side edge of the coupling section. If the coupling element is L-shaped, the coupling section must first be aligned horizontally or at least approximately horizontally in order to thread the coupling element into the opening. The railing post must then be rotated about its longitudinal axis or an axis running parallel to it so that the coupling section is transferred from the horizontal position to a vertical position. The space available in the area of ​​the coupling element can be so tight that there is little room to rotate the railing post.Therefore, the coupling section preferably has a reduced width at its end facing away from the railing post or at its outer end. To reduce the width, the coupling section preferably has a recess on both sides, so that the coupling section is mirror-symmetrical with respect to the longitudinal axis of the railing post.

[0026] Furthermore, it is proposed that the coupling section, in plan view, has a circularly arc-shaped end edge connecting the side edges of the coupling section. The coupling section can, for example, be designed as a tab with a rounded end. The rounding makes it easier to pivot the railing post around the coupling element after it has been hooked in. This applies in particular if the circularly arc-shaped end edge of the coupling section is arranged concentrically to a rounding at the outer end of the opening, so that the coupling section has the same width all the way around the opening. This ensures that the coupling section does not strike anything when pivoting. The rounding at the outer end of the opening can be either a rounded end or a rounded end extension of the opening.

[0027] The railing post is preferably made of a metal tube, as this offers high dimensional rigidity and thus stability. At the same time, weight can be saved because tubes are hollow. Furthermore, the metal tube preferably has a circular cross-section. Thus, the railing post poses no risk of injury. Alternatively or additionally, it is proposed that the railing post be plastically deformed at at least one end to form or accommodate a coupling section. The plastically deformed end section creates the transition from the flat coupling section to the metal tube. Furthermore, the railing post requires less freedom of movement when pivoting.

[0028] At this point, it should be noted that the coupling section and railing rail can be manufactured in one operation or separately and then joined.

[0029] The proposed railing post preferably has a coupling section at each of its two ends. This allows the railing post to be positioned between and secured to two vertical posts of a modular scaffold or two vertical frames of a frame scaffold. The two coupling sections can be designed identically or differently. Specific embodiments are described in more detail below.

[0030] Furthermore, a scaffold, in particular a module or frame scaffold, with at least one railing post according to the invention and at least one vertical post or vertical frame is proposed. The vertical post or vertical frame has at least one coupling element for coupling to a coupling section of the railing post. The railing post according to the invention simplifies the construction of the scaffold. Furthermore, it enables the formation of a leading railing. Depending on the specific design of the coupling element of the vertical post or vertical frame, a positive connection can be achieved between the coupling section of the railing post and the coupling element of the vertical post or vertical frame, which prevents the railing post from being dismantled in its position of use, i.e., when the scaffold is fully assembled. This increases the safety of the scaffold.

[0031] To increase safety, it is not necessary for every railing post to be designed according to the railing post according to the invention. One railing post according to the invention at the beginning and end of each scaffold level is sufficient to secure additional standard railing posts of the same scaffold level. This means that standard railing posts can still be used.

[0032] According to a preferred embodiment of the invention, the coupling element is essentially L-shaped and has a first section connected to the vertical post or the vertical frame, as well as a second section arranged at an angle, in particular at right angles, to the first section, which preferably extends vertically upwards when the vertical post or vertical frame is in the position of use. The second section therefore preferably runs parallel to the vertical post.

[0033] Due to its L-shape, the coupling element forms a kind of hook. This hook is open at the top, so that when the railing is in use, the coupling section cannot be removed without lifting, i.e., without external force. This is especially true for a coupling section with an opening whose end extension does not extend to a side edge. In this case, the coupling section must be lifted not only over the horizontal first section of the coupling element, but also over the vertical second section.

[0034] In a further development of the invention, it is proposed that the first section and the second section of the coupling element each have a circular cross-sectional shape. The diameter is preferably selected to be slightly smaller than the width of the opening of the coupling section of the railing post. Alternatively or additionally, it is proposed that the second section has a bead-like projection. The bead-like projection forms an undercut area which can be engaged behind by the coupling section of the railing post. To form the bead-like projection, the second section of the coupling element can, for example, be designed in the shape of a mushroom head. Because the coupling section engages behind the bead-like projection when the railing post is in use, it is impossible to unhook the railing post. This is because the bead-like projection cannot be overcome without displacing the railing post.However, when the railing is in the position of use, it cannot be moved.

[0035] In a further development of the invention, it is proposed that the bead-like projection extends only over a partial circumferential area of ​​the second section of the coupling element. This facilitates threading the coupling element into the opening of the coupling section of the railing post during scaffolding assembly, specifically in the area of ​​the end extension of the opening.

[0036] Advantageously, the bead-like projection is arranged at least on the side of the second section of the coupling element facing the vertical post or the vertical frame, so that the distance between the second section of the coupling element and the vertical post or the vertical frame is reduced by the projection. In this case, the distance between the second section of the coupling element and the vertical post or the vertical frame can be selected so narrow that the coupling section cannot pass through in a horizontal position without first moving the railing post. This can further complicate unintentional disassembly of the railing post.

[0037] To achieve the aforementioned object, a method for erecting a scaffold, in particular a modular or frame scaffold, is further proposed. In the method, a railing according to the invention is connected to a first vertical post or frame that has already been assembled and a second vertical post or frame that has yet to be assembled. The method comprises the following steps: a) coupling a first coupling section of the railing post to a coupling element of the first vertical post or frame, b) coupling a second coupling section of the railing post to a coupling element of the second vertical post or frame, c) positioning the railing post with the aid of the second vertical post or frame, which is transferred into its position of use for this purpose, wherein the railing post is pivoted about the coupling element of the first vertical post or frame.

[0038] This method allows for the installation of the guardrail from a lower scaffolding level or the creation of a forward guardrail. This increases safety during scaffolding erection. After the scaffolding has been erected, safety is further enhanced by the fact that the guardrail cannot be dismantled. Dismantling requires the guardrail to be moved relative to the coupling elements of the vertical uprights or frames. This would require the dismantling of one of the two vertical uprights or frames. The guardrail can only be dismantled gradually during the dismantling or dismantling of the scaffolding.

[0039] In step a) and / or step b) of the method, i.e., when coupling a coupling section of the railing post to a coupling element of a vertical post or frame, the coupling element of the vertical post or frame is preferably brought into engagement with the opening of the respective coupling section of the railing post. Depending on the specific design of the opening of the coupling section and the coupling element, different procedures are possible.

[0040] The coupling element of the vertical post or frame is preferably L-shaped and has a first section and a second section arranged at an angle to the first section. Furthermore, both sections preferably each have a circular cross-sectional shape.

[0041] Since the coupling section to be coupled has an opening with an end-side extension that does not extend to a side edge of the coupling section, the railing post is first rotated so that the coupling section is aligned substantially horizontally and the extension is arranged above the second section of the coupling element of the vertical post or frame. By lowering the coupling section, the coupling element is then brought into engagement with the opening in the area of ​​the extension. The railing post is then rotated about an axis running parallel to its longitudinal axis until the coupling section is aligned vertically. The railing post is then moved so that the coupling element reaches the end of the opening that is not extended. This ensures that the railing post can no longer be unhooked.Optionally, after inserting the coupling element into the opening, the railing can first be moved and then rotated. These movements can also be performed simultaneously.

[0042] Since the proposed railing post is particularly suitable for forming a leading railing, the use of a railing post according to the invention in a scaffold, in particular in a modular or frame scaffold, for forming a leading railing is also proposed. The railing post can be easily installed from a lower scaffold level or transferred into its position of use with the aid of a second vertical post or frame. Once the second vertical post or frame has been installed, the railing post can no longer be dismantled. This ensures that the highest safety requirements are met.

[0043] A preferred embodiment of the invention and its advantages are explained in more detail below with reference to the accompanying figures. These show: Fig. 1 a perspective view of a vertical post and a railing beam of a modular scaffold (not according to the invention), Fig. 2 a top view of a vertical post with the railing bar of the Fig. 1 (not according to the invention), Fig. 3 a perspective view of a modular scaffold with several vertical posts and railing beams corresponding to the railing beam of the Fig. 1 (not according to the invention), Fig. 4 a side view of the railing of the Fig. 1 (not according to the invention), Fig. 5 a side view of a second railing beam (not according to the invention), Fig. 6 a perspective view of a vertical post with a railing post already mounted and a railing post still to be mounted according to a preferred embodiment of the invention, Fig. 7a perspective view of the vertical post and the railing beams of the Fig. 6 with advanced assembly and Fig. 8 a plan view of a coupling section of a railing according to the Figures 6 and 7 . Detailed description of the drawings

[0044] Figure 1 shows a first embodiment of a railing beam 10 not according to the invention in connection with a vertical post 30 of a modular scaffold 100. The vertical post 30 is located in the Figure 1in its use position. In this position, it is vertically aligned. On the outer circumference, the vertical post 30 has several coupling elements 40, which are arranged at different heights. The coupling elements 40 are each L-shaped, so that they form a type of hook. The railing post 10 is suspended in the area of ​​a coupling element 40. In this position, the railing post 10 can be connected to another vertical post (not shown) and, with its help, brought into its use position (see Figure 3 ). The additional vertical post 30 is mounted at the same time. In this way, a leading railing can be formed.

[0045] The one in the Figure 1 The railing spar 10 shown is made of a metal tube 13 which is plastically deformed at both its ends 11, 12 and has a coupling section 20. The coupling sections 20 (see Figure 4) are each flat and have an opening 21. An extension 22 is provided at one end of the opening 21. The coupling element 40 can be brought into engagement with the opening 21 of the coupling section 20 via the extension 22.

[0046] As in particular the Figure 2 As can be seen, the opening 21 of the coupling section 20 has a width b1 which is slightly larger than the diameter of the coupling element 40 outside a bead-like projection 43. The bead-like projection 43 is consequently engaged behind by the coupling section 20 of the railing post 10 when the railing post 10 is rotated from a position of use in such a way that it Figure 2The railing post 10 cannot therefore be accidentally unhooked. To do so, the railing post 10 would first have to be moved so that the coupling element 40 reaches the other end of the opening 21, which has the extension 22. However, this is not possible in the position of use of the railing post 10 (see Figure 3 ).

[0047] To easily hook in the railing post 10, the extension 22 is guided as a slot up to a side edge 24 of the coupling section 20. The extension 22 accordingly opens the opening 21 towards the side edge 24. To easily thread the coupling element 40, the extension 22 is chamfered on both sides in the area of ​​the side edge 24. Apart from the extension 22, the opening 21 is arranged centrally with respect to the longitudinal axis A of the railing post 10, so that webs of equal width, each with a width a1, are created on both sides. The width a1 is slightly smaller than the distance between the coupling element 40 and the vertical post 30. This allows the railing post 10 to be rotated about its longitudinal axis A or an axis running parallel thereto, if necessary, without the railing post 10 being able to be unhooked.

[0048] As exemplified in the Figure 3The coupling elements 40 of the vertical posts 30 are shown designed to accommodate several, in particular two, railing stiles 10. For this purpose, each coupling element 40 has a first section 41 and a second section 42, which is arranged at right angles to the first section 41. The second section 42 extends vertically upwards. This means that the second section 42 runs parallel to the vertical post 30. The second section 42 also forms the bead-like projection 43. In the position of use, the railing stiles 10 are each supported via the first section 41 of the coupling element 40, so that the coupling sections 20 of the railing stiles 10 are vertically aligned. Thus, two railing stiles 10 can be arranged next to one another. The coupling sections 20 of the two railing stiles 10 lie flat on one another.

[0049] Like the Figures 1 and 2As can be seen, the vertical posts 30 can have further coupling elements in the form of perforated discs 50. Scaffolding elements, such as planking bars, longitudinal bars and / or diagonal bars (not shown), can be attached to these. Planking bars serve to hold a scaffolding plank 61, which is shown for example in the Figure 3 is shown.

[0050] Deviating from the Figure 4 In addition to the embodiment of a railing post 10 with two identically designed coupling sections 20, a railing post 10 can also have two differently designed coupling sections 20. This is exemplified in the Figure 5 The right coupling section 20 is analogous to the coupling sections 20 of the embodiment of the Figure 4 The left coupling section 20, on the other hand, has an opening 21 without an end extension 22. Modifications of this design are certainly possible.

[0051] A preferred embodiment of a railing beam 10 according to the invention is Figures 6 , 7 and 8 The Figures 6 and 7 each show a first railing post 10, which is already connected to a coupling element 40 of a vertical post 30, as well as another railing post 10 during assembly. As in particular the Figure 8As can be seen, the coupling sections 20 of the railing stiles 10 each have an opening 21 with an end extension 22, which is not guided to a side edge 24 of the coupling section 20, but rather maintains a distance a2 from the two side edges 24. The extension 22 has a width b2, which is in principle greater than the width b1 of the opening 21. The width b2 of the extension 22 is adapted to the bead-like projection 43 of the coupling element 40, so that the coupling section 20 can be guided over the bead-like projection 43 when hooked in. The coupling section 20 is aligned substantially horizontally (see Figure 6). Subsequently, the coupling element 40 is guided by sliding from the area of ​​the extension 22 to the other end of the opening 21, so that the coupling section 20 engages behind the bead-like projection 43 of the coupling element 40. Before or during this process, the coupling section 20 can be brought into the vertical position by rotating the railing post 10. The coupling section 20 thus comes to lie next to the coupling section 20 of the already mounted railing post 10.

[0052] The rotation of the railing bar 10 requires a certain amount of freedom of movement, which in the embodiment of the Figures 6 and 7 is created in that the coupling section 20 has a width B2 at the end, which is reduced compared to a width B1 in the area of ​​the connection to the metal tube 13 of the railing post 10. The side edges 24 of the coupling section 20 each have a recess 23 for this purpose (see also Figure 8 ).

[0053] In order to enable the turning and / or pivoting of the railing post 10 even in confined spaces, the coupling section 20 also has a circular arc-shaped front edge 25 connecting the two side edges 24. Since the circular arc of the front edge 25 is concentric to the circular arc of the extension 22, the distance a2 of the extension 22 to the side edge 24 does not change in the area of ​​the front edge 25. This means that the same freedom of movement is always required when pivoting the railing post 10. The necessary freedom of movement is further created by the fact that in the embodiment of the Figures 6 and 7 the extension 22 of the opening 21 is arranged on the outside. If it were arranged on the inside, it would collide with the already mounted railing spar 10, as shown in the example in the Fig. 7 shown.

[0054] A circular arc-shaped front edge 25, which is formed concentrically to a rounding at the end of the opening 21, therefore also has the coupling section 20 of the railing beam 10 of the Figures 1 to 4 on (see Figure 2 ). List of reference symbols

[0055] 10Railing post 11First end of the railing post 12Second end of the railing post 13Metal tube 20Coupling section 21Opening 22Extension 23Recess 24Side edge 25Front edge 30Vertical stem 40Coupling element 41First section of the coupling element 42Second section of the coupling element 43Protrusion 50-hole disc 61Scaffolding decking 100Scaffolding ALongitudinal axis of the railing B1Width of the coupling section B2Width of the coupling section a1Distance of the opening 21 to a side edge 24 a2Distance of the extension 22 to a side edge 24 b1Width of the opening 21 b2Width of the extension 22

Claims

1. Guard rail (10) for a scaffold (100), which has at least at one end (11, 12) a coupling section (20) for coupling to a coupling element (40) of a vertical post (30) or vertical frame of the scaffold (100), wherein the coupling section (20) is of flat construction and has passing through it an elongate opening (21) which extends parallel to a longitudinal axis (A) of the guard rail (10) and which has a constant width (b1) as far as an end-side extension (22), wherein the end-side extension (22) is arranged at the end of the opening (21) that faces away from the guard rail (10), and wherein, in the plan view of the coupling section (20), the extension (22) is rounded, in particular circular or part-circular, characterized in that, in the plan view of the coupling section (20), the opening (21) is extended on both sides, in particular is mirror-symmetrical with respect to the longitudinal axis (a).

2. Guard rail (10) according to claim 1, characterized in that in the plan view of the coupling section (20), the opening (21) and / or the extension (22) is / are arranged centrally with respect to the longitudinal axis (A).

3. Guard rail (10) according to any one of the preceding claims, characterized in that the coupling section (20) has a reduced width (B2) at its end facing away from the guard rail (10), wherein to reduce the width, preferably the coupling section (20) has a recess (23) on both sides.

4. Guard rail (10) according to any one of the preceding claims, characterized in that the coupling section (20) has, in plan view, two straight side edges (24) and an circular arc-shaped front edge (25) which connects the two side edges (24), wherein preferably the circular arc-shaped front edge (25) is formed concentrically to a rounding at the outer end of the opening (21).

5. Guard rail (10) according to any one of the preceding claims, characterized in that the guard rail (10) is formed from a metal tube (13) which preferably has a circular cross-sectional shape and / or is plastically deformed at least at one end (11, 12) for the formation or reception of a coupling section (20).

6. Guard rail (10) according to any one of the preceding claims, characterized in that the guard rail (10) has a coupling section (20) at each of its two ends (11, 12), wherein the two coupling sections (20) are configured identically or differently.

7. Scaffold (100), in particular modular or frame scaffold, having at least one guard rail (10) according to any one of the preceding claims and at least one vertical post (30) or vertical frame which has at least one coupling element (40) for coupling to a coupling section (20) of the guard rail (10).

8. Scaffold (100) according to claim 7, characterized in that the coupling element (40) is substantially L-shaped and has a first section (41) connected to the vertical post (30) or vertical frame and a second section (42) arranged at an angle, in particular at a right angle, in this respect, which extends preferably vertically upwards in the position of use of the vertical post (30) or vertical frame.

9. Scaffold (100) according to claim 8, characterized in that the first section (41) and the second section (42) of the coupling element (40) each have a circular cross-section and / or the second section (42) has a bead-like projection (43) which preferably extends only over a partial circumferential region.

10. Scaffold (100) according to claim 9, characterized in that the bead-like projection (43) is arranged at least on the side of the second section (42) facing the vertical post (30) or the vertical frame, so that the distance between the second section (42) of the coupling element (40) and the vertical post (30) or the vertical frame is reduced by the projection (43).

11. Method for erecting a scaffold (100), in particular a modular or frame scaffold, in which a guard rail (10) according to any one of claims 1 to 6 is connected to a first vertical post (30) or frame that is already assembled and to a second vertical post (30) or frame that is still to be assembled, comprising the steps of: a) coupling a first coupling section (20) of the guard rail (10) to a coupling element (40) of the first vertical post (30) or frame, b) coupling a second coupling section (20) of the guard rail (10) to a coupling element (40) of the second vertical post (30) or frame, c) positioning the guard rail (10) with the aid of the second vertical post (30) or frame, which is transferred to its position of use in this respect, wherein the guard rail (10) is pivoted about the coupling element (40) of the first vertical post (30) or frame.

12. Method according to claim 11, characterized in that in step a) and / or in step b) the coupling element (40) of the vertical post (30) or frame is brought into engagement with the opening (21) of the respective coupling section (20) of the guard rail (10).

13. Use of a guard rail (10) according to any one of claims 1 to 6 in a scaffold (100), in particular in a modular or frame scaffold, for forming a forward-extending railing.