Railing post for a leading railing for a scaffold, scaffold with a leading railing and method for transferring a leading railing to a scaffold

Abstract

Railing post for a leading railing for a scaffold, scaffold with a leading railing and method for relocating a leading railing on a scaffold, wherein a third connection device (16) is designed as a projection device running in the transverse direction (Q) with a first connection region (34) connected to the railing post (10.1, 10.2, 10.3, 10.4), wherein the first connection region (34) has a downwardly pointing, in particular curved, projection unit (38, 38.1).

Description

TECHNISCHES GEBIET

[0001] The present invention relates to a guardrail post for a scaffold with scaffold levels, including vertical uprights / frames extending longitudinally / vertically, crossbeams extending transversely / horizontally, guardrail rails, and decking for mounting a so-called leading guardrail, by means of which at least one temporary, telescopic guardrail rail can be mounted from an existing lower scaffold level for an upper scaffold level to be mounted above it, comprising a first connection device, a second connection device, and a third connection device, wherein the first connection device is arranged in the upper end region of the guardrail post, to which at least one temporary guardrail rail can be detachably connected, and the third connection device is arranged in the lower end region of the scaffold post, which can be detachably connected to existing components of the scaffold.in particular, the second connection device is connectable to the vertical post with attached guardrails or a rosette of the vertical post; the second connection device is arranged longitudinally spaced above the third connection device, which can be detachably locked to the vertical post of the scaffold; a continuous rotatable shaft is arranged inside the guardrail post; the rotatable shaft is connected to externally accessible rotary actuation devices, which are arranged in the upper and / or lower end region of the guardrail post and are movable in one direction, in particular rotatable in one direction; the second connection device has a positive locking unit fixedly connected to the guardrail post and a movable, in particular rotatable, positive locking unit connected above or below or inside the fixed positive locking unit.which is movable from a closed position to a maximum open position and vice versa, wherein in the closed position a positive locking of an inserted guardrail post to a vertical upright of the scaffold is given.

[0002] The present invention further relates to a scaffold with a leading railing having such railing posts and a method for repositioning a leading railing on an existing scaffold.

[0003] Typically, side protection with a guardrail is only installed once the scaffolder is on the level of the scaffold being worked on. This is dangerous because, without side protection, the scaffolder is exposed at great heights and, in the worst-case scenario, could fall from the scaffold. To increase safety, so-called leading guardrails are used, which provide side protection on the upper level of the scaffold being worked on.

[0004] These types of advancing guardrails typically consist of three individual components per scaffold bay: two identical guardrail posts attached to existing vertical uprights of the scaffold, to which at least one, and preferably two, telescopic rails are connected. The guardrail posts with their attached rails are assembled from the scaffold level below, thus providing at least a single section of side protection on the next, upper scaffold level due to their length. As construction progresses, one additional guardrail post of the advancing guardrail is successively moved upwards to secure the upper scaffold level for further assembly work. Disassembly is carried out in reverse order. STATE OF THE ART

[0005] German patent DE 10 2009 024 816 A discloses a railing post for a leading railing system, which has two scissor-like claws that must be actively opened and closed for connection. A pin serves as a locking and securing mechanism in the lower part of the scissor-like claws. To ensure a positive fit, the outer post tube of the railing post must be moved vertically, then rotated, and lowered again. Unlocking is performed in reverse order. A disadvantage of this leading railing system is that installation and removal require awkward vertical and horizontal movements. Furthermore, during installation, care must be taken to ensure that the upper and lower scissor-like claws are fully connected to and encircle the vertical frame or post being attached.

[0006] EP 1 338 723 A2 discloses a device for mounting a temporarily existing guardrail of scaffolding, in which the third lower connection device is hooked onto existing guardrails and the second connection device is connected to the guardrail by means of a U-shaped receiving unit with wedge unit.

[0007] EP 1 571 275 A2 discloses a device for mounting a temporary guardrail post with attached telescopic rails to existing vertical posts of a scaffold, according to the features of the preamble of claim 1. The guardrail post has claws with an automatic clamping function, wherein a continuous rotatable shaft is inserted inside the guardrail post. This shaft can be rotatably actuated via actuating units and is connected to the claws via a relatively complex mechanism. To connect the vertical post to the guardrail post, the claws must be actively opened and closed by a rotational movement of the actuating unit. For this purpose, the actuating unit is rotated accordingly. A disadvantage of this solution is that a rotational movement must be actively performed during the assembly and disassembly of the adjoining guardrail. In addition, the internal mechanism is relatively complex and prone to damage.Furthermore, during assembly, care must be taken to ensure that the upper and lower claws are fully connected and locked into place on the vertical frame or vertical pole to be attached.

[0008] Furthermore, GB 2 565 057 A and ES 2 337 776 T3 are known from the prior art in printed form. PRESENTATION OF THE INVENTION

[0009] Based on the aforementioned prior art, the present invention addresses the objective or technical problem of providing a guardrail post for a leading guardrail that offers reliable side protection on the next upper scaffold level, can be quickly and easily assembled from the scaffold level below, ensures a durable and robust construction with consistently reliable functionality, and can be manufactured economically. The present invention further addresses the objective or technical problem of providing a scaffold with a leading guardrail that guarantees high safety standards and enables simple, quick, and therefore economical assembly and disassembly of the leading guardrail.The present invention further aims to provide a method for implementing a leading railing from an existing scaffold level to a scaffold level above it that is yet to be assembled, which ensures quick and easy assembly while guaranteeing permanently reliable function of the leading railing.

[0010] The railing post according to the invention is defined by the features of independent claim 1. Advantageous embodiments and further developments are the subject of claims 2 to 11, which are directly or indirectly dependent on independent claim 1.

[0011] Methods according to the invention for implementing a leading railing on a scaffold are given by the features of claim 12.

[0012] The railing post according to the invention is characterized in that the movable form-locking unit is connected, in particular directly, to the rotatable shaft, an elastic element is present which acts on the movable form-locking unit and holds it in the closed position under its sole effect, the movable form-locking unit is designed in its end-face region such that, when pressed against a vertical post of the frame, it initially opens in the opening direction and, after exceeding a predetermined position of displacement of the vertical post, i.e., upon reaching the maximum opening position, moves into the closed position due to the effect of the spring force of the elastic element and thus at least partially encloses the vertical post in a form-locking manner and securely locks it.To release the connection, the upper or lower rotary actuation device is turned in the direction of rotation, so that the movable positive locking unit moves in the opening direction or rotates in the direction of rotation and releases the railing post.

[0013] One embodiment of the railing post according to the invention, which, viewed from above, ensures particularly small distances from the inner edge of the temporary railing to the outer edge of the decking or toeboard when viewed in the connected state of the leading railing to the scaffold, is characterized in that the first connection device is designed as a projection device with two horizontally spaced projecting projection units, the clear inner distance of which is greater than the outer diameter of the vertical post and in the end region of which each has a connection unit for the temporary telescopic railing, wherein the first connection device is characterized with respect to an advantageous geometry in that the projection length of the first connection device is so large,that, in the case of guardrail posts connected to the vertical post, the connection units are located next to the vertical post, either in its immediate vicinity or projecting beyond the vertical post into the interior of the scaffold. This allows, for example, a gap of 80 mm or less between the temporary guardrail rail and the toeboard, as seen from above.

[0014] An embodiment according to the invention with regard to the connection of the temporary railing posts is characterized in that the connection units each have a toggle pin.

[0015] A further development according to the invention, which ensures simple assembly or disassembly or simple repositioning of the leading railing, is characterized in that the third connection device is designed as a projection device extending in the transverse direction with a first connection area connected to the railing post or a second connection area or a second connection area connected to the first connection area in the transverse direction, wherein the first connection area has a downwardly pointing, in particular curved, projection unit and / or the second connection area has a recess open longitudinally downwards.

[0016] A particularly advantageous further development, which is designed to be particularly simple in its construction and guarantees a permanently reliable function, is characterized by the fact that the elastic element is designed as a torsion spring.

[0017] A particularly simple assembly is ensured according to an advantageous embodiment by the fact that the fixed form-locking unit is designed as a fork construction open towards its free end area, in particular U-shaped.

[0018] A particularly preferred embodiment is characterized by the fact that the rotatable form-locking unit is designed as a hook unit, which has an inclined end contour in its free end region. The inclined end contour advantageously ensures that a simple, automatic connection process is enabled by simply pressing it against the vertical post of the existing scaffolding. This is achieved by first pressing the rotatable form-locking unit against the vertical post, causing it to expand. Upon reaching the open position, the elastic element returns the unit to the closed position, or "snaps" it into place, as the guardrail post continues to move, thereby securing the guardrail post to the vertical post in a form-locking manner.

[0019] A particularly preferred embodiment with regard to permanently reliable functionality, which also ensures high connection reliability, is characterized by the fact that the fixed positive locking unit and the rotatable positive locking unit have at least partially a semi-circular inner contour that corresponds to the outer contour of the vertical stem, wherein, viewed from a top view, in the closed position of the rotatable positive locking unit together with the fixed positive locking unit, a complete or almost complete circular inner contour results, which securely locks the inserted vertical stem in a positive locking manner.

[0020] A particularly simple design, which ensures high positioning accuracy with regard to the definition of the required connection geometries, is characterized by the fact that a stop unit is present on the railing post or the fixed form-locking unit, against which the rotatable form-locking unit abuts in the closed position.

[0021] A particularly preferred, structurally simple design is characterized by the fact that the rotatable positive locking unit is connected to the rotatable shaft via a connecting element that is guided within a slot in the railing post.

[0022] With a view to particularly easy assembly and disassembly of the railing post, an advantageous further development is characterized by the fact that the upper rotary actuation device is arranged below the first connection point and / or the lower rotary actuation device is arranged above the third connection point. This ensures that the rotary actuation devices are easily accessible to the installer during the respective assembly process.

[0023] A particularly preferred embodiment, which ensures the functional safety of a leading railing, is characterized in that the second connection device is arranged within the railing post in such a way that, in the connected state of the railing post to the vertical post, it is located directly below a projecting component of the scaffolding, in particular a gusset plate, so that a displacement in the longitudinal direction is blocked.

[0024] An advantageous embodiment, which ensures the connection security of the guardrail post, particularly when used within a known Layher Allround scaffolding ®< (registered trademark) system, is characterized by the fact that the guardrail post has a safety stop unit projecting from the guardrail post above the second connection device, particularly in the transverse direction, which is arranged within the scaffold post in such a way that, in the connected state of the guardrail post to the vertical post, it is located directly below a projecting component, in particular a rosette, of the vertical post and blocks displacement in the longitudinal direction.

[0025] An alternative, particularly advantageous guardrail post according to the invention, designed independently of the first and second connection devices described above, for a scaffold with scaffold levels with vertical uprights / frames extending longitudinally / vertically, crossbeams, rails, and decking extending transversely / horizontally, for mounting a so-called leading guardrail, by means of which at least one temporary, telescopic rail can be mounted from an existing lower scaffold level for an upper scaffold level to be mounted above it, comprising a first connection device, a second connection device, and a third connection device, wherein the first connection device is arranged in the upper end region of the guardrail post, to which at least one temporary rail can be detachably connected, and the third connection device is arranged in the lower end region of the scaffold post.The second connection device, which is detachably connectable to existing components of the scaffold, in particular to the vertical post with attached guardrails or a rosette of the vertical post, and which is arranged longitudinally spaced above the third connection device, which is detachably lockable to the vertical post of the scaffold, is characterized in that the third connection device is designed as a projecting device extending in the transverse direction with a first connection area connected to the guardrail post, or a second connection area, or a second connection area connected transversely to the first connection area, wherein the first connection area has a downwardly pointing projection unit and / or the second connection area has a recess open longitudinally downwards.

[0026] With regard to connection security, a preferred embodiment of the railing post according to the invention is characterized by the fact that the second connection area has an outwardly open receiving unit with two spaced-apart legs, on each of which the downwardly open recess is formed.

[0027] A particularly advantageous embodiment of the guardrail post according to the invention, which can preferably be used in a modular scaffold, is characterized in that the projection unit is designed as a profile unit that is curved, particularly towards the guardrail post. The design as a curved profile unit ensures both simple assembly and disassembly by simply threading the profile unit into or out of the recess of a rosette in the vertical post. Furthermore, in the assembled state, it provides protection against longitudinal displacement, since in the vertical assembly end position of the guardrail post, the curvature of the profile unit blocks upward lifting in the vertical (longitudinal) direction.

[0028] The guardrail post according to the invention ensures particularly simple and functionally reliable assembly, disassembly, or relocation of the leading guardrail. The guardrail post enables automatic locking of the leading guardrail, whereby unlocking the leading guardrail can only be achieved actively by actuating the rotary operating devices. Furthermore, the guardrail post according to the invention features robust mechanics compared to known systems and is suitable for use with modular scaffolding (for example, the Layher Allround Scaffolding® (registered trademark) system) and facade scaffolding (for example, the Layher Blitz Scaffolding® (registered trademark) system).The described design reliably prevents vertical and horizontal displacement of the attached leading railing; instead, the leading railing can only be actively released by operating the rotary control devices.

[0029] A facade scaffold according to the invention (for example, Layher Blitz Scaffold ®< (registered trademark)) with a leading railing is described by the following features: Scaffold with vertical frames with vertical posts and with crossbeams connecting the vertical posts in the transverse direction via a gusset plate and with railing posts connected to the vertical posts with an attached leading railing with the railing post described above, wherein temporary telescopic railing posts are connected to the first connection device on both sides, the third connection device is suspended in the existing railing posts via its downwardly open recesses of the second connection area on the vertical post in the connection area of ​​the existing railing posts,The vertical post runs through the open recess of the second connection area, and the second connection device is connected to the vertical post directly below the gusset plate, thus blocking any upward longitudinal displacement.

[0030] A modular scaffold (for example, Layher Allround scaffold ®< (registered trademark)) is described by the following features: Scaffold with vertical standards with rosettes connected longitudinally in a predetermined grid dimension, with recesses, and with crossbeams connecting the vertical standards to the rosettes in the transverse direction by means of a wedge-head connection, and guardrails connected to the rosettes of the vertical standards with an attached leading guardrail and the guardrail post described above, wherein temporary telescopic guardrails are connected to the first connection device on both sides, the third connection device is inserted into a recess of the rosette via its longitudinally downward-pointing, in particular curved, projection unit, to which the existing guardrails are connected.so that a longitudinal displacement is blocked by the safety stop unit or by the curved contour of the projection unit, and the second connection device is connected to the vertical stem.

[0031] The procedure for relocating a leading railing on a facade or modular scaffold, with railing posts as described above connected to vertical uprights, from an existing secured scaffold level for a further scaffold level to be mounted and secured above it, is characterized by the following procedure steps: Turning the upper rotary actuator to release the locking mechanism of the second connection device from the vertical post, tilting the guardrail post outwards, lifting the guardrail post longitudinally upwards to release the third connection device from the vertical post, further lifting the guardrail post longitudinally upwards until the height of the existing rail is reached, engaging the third connection device at the level of the rosette with the connected existing rails by inserting the projection unit into a recess in the rosette or at the level of the connection of the existing rails to the vertical post by engaging the second connection area with the recesses in the existing rails, tilting the guardrail post towards the vertical post of the scaffold until it abuts the rotatable positive locking unit of the second connection device.Further pressure on the railing post against the action of the elastic element towards the vertical post causes the rotatable form-locking unit to open, and the railing post to move further towards the vertical post. Upon reaching its vertical end position, i.e., the maximum opening position, the rotatable form-locking unit automatically moves into the closed position due to the action of the elastic element, and the railing post, in its vertically aligned end position, is at least partially or almost completely enclosed by the fixed form-locking unit, thus securely locking it in place.

[0032] Another method according to the invention for relocating a leading railing on a facade or modular scaffold with railing posts as described above connected to vertical uprights from an existing secured scaffold level for a further scaffold level to be mounted and secured above it, is characterized by the following method steps: Detaching the second connection device from the vertical post, tilting the guardrail post outwards, lifting the guardrail post longitudinally upwards to detach the third connection device from the vertical post, further lifting the guardrail post longitudinally upwards until the height of the existing rail is reached, hooking the third connection device at the level of the rosette with the connected existing rails by inserting the, in particular curved, projection unit into a recess in the rosette or at the level of the connection of the existing rails to the vertical post by hooking the second connection area with the recesses into the existing rails, tilting the guardrail post towards the vertical post of the scaffold to connect the guardrail post to the vertical post via the second connection device, connecting the second connection device to the vertical post.

[0033] The illustrated railing post according to the invention provides a quick-to-assemble and robust railing post for a leading railing. In a first design, it features a second connection device with a wedge- or U-shaped tube receptacle for the vertical post. This receptacle opens automatically when pressed against the vertical post by means of a simple mechanism (snap mechanism with torsion spring) and then immediately closes again as soon as the vertical post reaches its end position and is completely enclosed by the rotatable positive locking unit. A simple rotation of the rotary actuation devices opens the second connection device with its rotatable positive locking unit, allowing the railing post to be repositioned.One advantage of this system is that the guardrail post locks automatically, but the installer must actively unlock it using the operating device to reposition the advancing guardrail section. This saves considerable time during installation, as threading the post into receiving or connecting devices, as required in previous designs, is no longer necessary, or at least fewer steps are needed for assembly. The rotating positive locking unit is connected to the two rotary operating devices via the rotating shaft in the outer tube of the scaffold post, allowing the guardrail post to be locked and unlocked at both operating devices, in both the upper and lower sections. The integrated elastic element (torsion spring) ensures reliable locking of the guardrail post to the vertical post via the second connecting device.

[0034] The third connection point in the lower part of the guardrail post is designed for optimal mounting to the guardrail connection of a system frame, such as a Layher Blitz Scaffolding® (registered trademark) system, and / or to the rosette of a vertical post, such as a Layher Allround Scaffolding® (registered trademark) system. The third connection point is simply placed or hooked into position and is secured against displacement by precisely fitting recesses.

[0035] An alternative, non-inventive guardrail post for a modular scaffold (Layher Allroundgerüst ®< (registered trademark)) has a third connection device with only a first connection area, which has a curved profile unit on its underside. The first and second connection devices can be designed in any way and each only needs to fulfill the desired functionality; that is, temporary guardrail posts must be detachably connectable to the first connection device, and the second connection device must be detachably lockable to the vertical post.

[0036] Further embodiments and advantages of the invention result from the features further listed in the claims and from the exemplary embodiments given below. BRIEF DESCRIPTION OF THE DRAWING

[0037] 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 drawing shows: Fig. 1 Perspective view of a first embodiment of a guardrail post for a leading guardrail, suitable for use on a facade scaffold, for example Layher Blitz Scaffold® (registered trademark) system, with a first connection device, a second connection device, and a third connection device, and a rotary operating device for releasing the second connection device. Fig. 2 Perspective view of a second embodiment of a guardrail post for a leading guardrail, suitable for use on a modular scaffold, for example Layher Allround Scaffold® (registered trademark) system, with a first connection device, a second connection device, and a third connection device, and a rotary operating device for releasing the second connection device. Fig. 3 Schematic perspective view of a third connection device according to Fig. 1 and 2, Fig. 4 schematic detail side view of the second connection device of the railing post according to Fig. 1 on a facade scaffold, Fig. 5 schematic detail view of the third connection device of a railing post according to Fig. 1 to a facade scaffold, Fig. 6 schematic detail view of the connection of the second connection device of a railing post according to Fig. 2 to a modular scaffold, Fig. 7 schematic detail view of the connection of a third connection device of a railing post according to Fig. 2 on a modular scaffold, Fig. 8 schematic perspective view of the second connection device of the railing post according to Fig. 1 and 2in the closed state, without connection to a vertical stem, Fig. 9 schematic perspective view of the second connection device with rotary actuation device in the open state, Fig. 10 schematic detailed perspective view of the second connection device in the closed state showing the stop unit and connection to the rotatable shaft, Fig. 11 schematic detailed sectional perspective view of the second connection device according to Fig. 10 , Fig. 12 schematic side view of the second connection device according to Fig. 11 , Fig. 13 schematic perspective view of the first connection device of the railing post according to Fig. 1 , Fig. 14 schematic detailed perspective view of a first assembly state of the railing post according to Fig. 1 to a facade scaffold, Fig. 15 schematic detailed perspective view of the connection of the railing post according to Fig. 1 Fig. 16 schematic detailed perspective view of a scaffold bay of a facade scaffold in an intermediate assembly state, Fig. 17 schematic detailed perspective view of a facade scaffold with mounted guardrail posts according to Fig. 16 In the final state, Fig. 18 schematic perspective view of three scaffold bays of a facade scaffold with mounted leading guardrails, Fig. 19 schematic perspective view of three scaffold bays with a mounted leading guardrail with scaffold decks and frames already mounted in the scaffold level above, Fig. 20 schematic perspective view of a guardrail post connected to a vertical standard of a modular scaffold according to Fig. 2 Fig. 21 Perspective view of a third embodiment of a guardrail post for a leading guardrail, suitable for use on a facade scaffold, for example Layher Blitz Scaffold® (registered trademark) system, as well as for use on a modular scaffold, for example Layher Allround Scaffold® (registered trademark) system, with a first connection device, a second connection device and a third connection device and rotary actuation device for releasing the second connection device, Fig. 22 Schematic perspective view of a third connection device according to Fig. 21 , Fig. 23 schematic detail view of the second connection device according to Fig. 21 to a modular scaffold, Fig. 24 schematic detail view of the connection of a third connection device of a railing post according to Fig. 21 to a modular scaffold and Fig. 25 perspective view of a fourth non-inventive embodiment of a guardrail post for a leading guardrail, suitable for use on a modular scaffold, for example Layher Allround scaffold ®< (registered trademark) - system, with a first connection device, a second connection device and a third connection device with a curved projection unit and rotary actuation device for releasing the second connection device. WAYS TO IMPLEMENT THE INVENTION

[0038] In Fig. 1 Figure 1 shows a first embodiment of a guardrail post 10.1, which is used in a leading guardrail system on a facade scaffold, such as the Layher Blitz Scaffolding® (registered trademark) system. The guardrail post 10.1 is designed as a round tube. The longitudinal direction of the guardrail post 10.1 is Fig. 1 indicated with the reference symbol L and the transverse direction perpendicular to the longitudinal direction L is in Fig. 1 indicated with the reference symbol Q.

[0039] The railing post 10.1 has a first connection device 12.1 in its upper end area, spaced apart from the end face, to which two telescopic temporary railing bars can be detachably connected on both sides.

[0040] Immediately below the first connection device 12.1, an upper rotary actuating device 22.1 designed as a rotary handle is arranged, which can be rotated in the direction of rotation D about the longitudinal direction L and is connected to a continuous, rotatably mounted shaft arranged on the inside in the railing post 10.1, which is Fig. 1 is not visible. The rotatable shaft 18 is not shown in the illustration in Fig. 11 Partially visible.

[0041] Below the upper rotary actuating device 22.1, a further first connection device 12.1 is connected. Both first connection units 12.1 project in the transverse direction Q.

[0042] A third connection device 16 is attached to the lower end region of the railing post 10.1, spaced apart from the lower end face, and also projects in the transverse direction Q. Above the third connection device 16 is a lower rotary actuation device 22.2, designed as a rotary handle, rotatable in the direction of rotation D and connected to the Fig. 1 rotatable shaft not shown (reference numeral 18 see Fig. 11 ) is connected.

[0043] Above the lower rotary actuation device 22.2, a second connection device 14 is connected, which also projects in the transverse direction Q and has a non-rotatably connected positive locking unit 24 and a rotatable positive locking unit 26 connected to the rotatable shaft 18.

[0044] In Fig. 2 Figure 1 shows a second embodiment of a guardrail post 10.2, which is used in a leading guardrail system on a modular scaffold, in particular a Layher Allround Scaffold® (registered trademark) system. This guardrail post 10.2 has essentially the same lower and upper rotary actuation device 22.1, 22.2, the same second connection device 14 and the same third connection device 16 as the guardrail post 10.1 according to Figure 1. Fig. 1 is present. Identical components bear the same reference number and are not explained again. One difference from the railing post 10.1 is that the first connection device 12.2 is designed as a projecting unit 76 with a toggle pin 74 for the detachable connection of the telescopic temporary railing posts. The further first connection device 12.2 below the upper rotary actuation device 22.1 is also designed as a projecting unit 76 with a toggle pin 74.

[0045] Finally, in the case of the railing post 10.2, there is also an additional safety stop unit 32 running in the transverse direction Q between the further first connection device 12.2 and the second connection device 14.

[0046] The third connection device 16 is in Fig. 3 A more detailed illustration follows. A first connection area 34, extending transversely in the direction Q, is formed on the railing post 10.1 or 10.2 and has a downwardly pointing projection unit 38. A second connection area 36, ​​also extending transversely in the direction Q, is connected to the first connection area 34 and has a U-shaped receiving unit 48 with two legs (viewed from above), both legs having a downwardly open U-shaped recess 40 on their underside.

[0047] The U-shaped receiving unit 48 has a semicircular inner contour in its receiving base.

[0048] The second connection device 14 is in the Figuren 8 bis 12 The second connection device 14 has a fixed, transversely Q-projecting, positive-locking unit 24, which is firmly connected to the guardrail posts 10.1, 10.2 and has an outwardly open, U-shaped recess 35 with projection units 33 arranged on both sides, wherein the inner base of the U-shaped recess 35 has a semicircular inner contour, in particular a semicircular inner contour 25. This inner contour 25 has a radius of curvature that essentially corresponds to the radius of curvature of the outer circumferential contour of a vertical post of a scaffold to be connected.

[0049] A rotatable form-locking unit 26 is connected slightly spaced above the fixed form-locking unit 24, as shown in Fig. 10 represented via a connecting pin 44, which is guided in a slot 42 of the outer wall of the railing post 10.1, 10.2, to the rotatable shaft 18 (see Fig. 11 ) connected.

[0050] The rotatable positive locking unit 26 is designed in its front end region as a hook unit with a semicircular inner contour 27, the radius of curvature of which essentially corresponds to the radius of curvature of the outer contour of the railing post 10.1, 10.2. In the front end region of the hook unit, it has an inclined end contour 51.

[0051] An elastic element 28 is arranged between the fixed positive locking unit 24 and the rotatable positive locking unit 26, which is designed as a torsion spring and is connected to both positive locking units 24, 26.

[0052] The maximum rotational movement D of the rotatable positive locking unit 26 is limited by the guidance of the connecting unit 44 in the slot 42. Furthermore, a stop unit 30 is integrally formed on the fixed positive locking unit 24, against which the rotatable positive locking unit 26 engages in the closed position according to Fig. 8 and strikes as a result of the action of the elastic element 28. In the closed position, the inclined end contour 51 of the rotatable positive locking unit 26, together with the inner contour of a projection unit 33 of the first positive locking unit 24, forms a V-shaped recess in a top view, in which the vertical post of the frame is initially inserted during assembly.

[0053] If a compressive force in the transverse direction Q towards the guardrail post 10.1, 10.2 is applied to the inclined end contour 51, for example by pressing the second connecting device 14 against a vertical post of a scaffold, the rotatable positive locking device opens against the action of the elastic element 28. As soon as the pressed-on vertical post has reached the bottom of the U-shaped recess 35, i.e. the semicircular contour 35, the rotatable positive locking unit 26 snaps back into the closed position due to the action of the elastic element 28, thereby positively engaging the inserted vertical post and securely locking it in its inserted position.

[0054] The Fig. 9 Figure 1 shows the rotatable positive locking unit 26 in the open position, which is achieved by turning the rotary actuating device 22.1 in the direction of rotation D. In In this position, the vertical stem can be detached from the second connection device.

[0055] The Fig. 4 Figure 1 shows in detail the connection of the second connection device 14 of the guardrail post 10.1 to a facade scaffold with a vertical upright 58.1, to which a crossbeam 60.1 is connected via a gusset plate 64. Platforms for accessing the scaffold level are hung in the crossbeam 60.1 during the erection of the scaffold. The second connection device 14 is connected to the vertical upright 58.1 directly below the gusset plate 64, so that upward movement of the guardrail post 10.1 in the longitudinal direction L is prevented by the second connection device 14 abutting the gusset plate 64 on its underside.

[0056] In Fig. 5 The connection of the third connection device 16 to the vertical upright 58.1 of a facade scaffold, which can be, for example, the well-known Layher Blitz Scaffold® (registered trademark) system, is shown. A guardrail box 78 is attached to the vertical upright 58.1, to which existing guardrail posts 68 of the scaffold are detachably connected. The third connection device 16 is suspended from above on both sides of the connection area of ​​the existing guardrail posts 68 via the U-shaped recess 40 of the vertical upright 58.1 with its second connection area 36, ​​whereby the vertical upright 58.1 penetrates between the two legs of the U-shaped receiving unit 48 in contact with the semicircular inner contour of the base of the receiving unit 48.

[0057] In Fig. 6 The connection of the second connection device 14 to a vertical upright 58.2 of a modular scaffold is shown. Rosettes 66 with connection recesses are provided on the vertical upright 58.2 in a grid pattern defined in the longitudinal direction L. Such a modular scaffold can, for example, be the well-known Layher Allround Scaffold® (registered trademark) system.

[0058] The safety stop unit 32 is arranged in such a way that it is located directly below a rosette 66, meaning that the railing post 10.2 cannot be moved upwards in the longitudinal direction L, as the safety stop unit 32 abuts the rosette 66.

[0059] In Fig. 7 The connection of the third connection device 16 to the vertical stem 58.2 is shown. The first connection area 34 is hooked into a recess of the rosette 66 with its downwardly pointing projection unit 28, and the vertical stem 58.2 runs through the U-shaped receiving unit 48.

[0060] In Fig. 13 The first connection device 12.1 is shown in more detail.

[0061] The first connection device 12.1 is designed as a fork-shaped construction with two parallel-spaced projection units 76, each of which has a connection unit 72 with a toggle pin 74 at its free end for the detachable connection of a temporary, telescopic railing post of a leading railing. The clear inner distance A of the projection unit 76 is larger than the outer diameter of the vertical post 58.1, 58.2 of the scaffold. The projection units 76 are additionally connected to each other by an inwardly offset crossbar 75.

[0062] The illustrated design allows the connection units 72 of the first connection device 12.1 to be positioned significantly closer to the scaffold or scaffold platform when the guardrail post 10.1 is connected, in contrast to known connection devices where the temporary guardrail is connected externally in front of the vertical post. This ensures that, when connected, the distance between the inner contour of the temporary guardrail 20 and the outer contour of the platform or toeboard, as viewed from above, does not exceed a permissible dimension of, for example, 80 mm.

[0063] The Figuren 14 bis 19 Figure 10.1 shows the use of the guardrail post in a leading guardrail system in different mounting positions on a facade scaffold such as the Layher Blitz Scaffold® (registered trademark) system. The facade scaffold 50 has vertical frames 56 with vertical uprights 58.1 spaced parallel in the transverse direction, which are connected at their upper ends to a crossbeam 60.1 via a gusset plate 64. At their lower ends, the two vertical uprights 58.1 are connected by a cross profile 70.

[0064] As in Fig. 14 As shown, the railing post 10.1 is first hooked into the existing railing post 68 from above with its third connection device 16 in the connection area of ​​the existing railing posts 16 and is initially in an outwardly inclined position, in which the second connection device 14 with its rotatable positive locking unit 26 rests against the outer contour of the vertical post 58.1. By further pressing the railing post 10.1 towards the vertical post 58.1, the rotatable positive locking unit 26 opens until the Fig. 15 The vertical end position of the railing post 10.1 is shown. In this position, the rotatable positive locking unit 26 snaps into the closed position due to the action of the elastic element, and the vertical post 58.1 is positively enclosed and thus locked by the second connection device 14. In the Figuren 14 and 15The detachable, telescopic railing posts of the leading railing are not shown.

[0065] The in Fig. 15 The connection situation of the railing post 10.1 to the vertical post 58.1 shown corresponds with regard to the connection of the second connection device 14 to the detailed illustration according to Fig. 4 and regarding the third connection device 16 of the detailed illustration according to Fig. 5 .

[0066] The Figuren 16 bis 19 show the use of the guardrail post 10.1 as part of a leading guardrail with telescopic guardrail stiles 20 connected to both first connection devices 12.1 in different mounting positions in a scaffold bay ( Figuren 16 bis 19 ) and in three scaffold bays ( Fig. 18 and 19 ).

[0067] Fig. 16 Figure 1 shows an intermediate assembly state of a scaffold bay of a lower level 54 of the scaffold 50, in which the left guardrail post 10.1 is still in a lower assembly position and the right guardrail post 10.1 is already in its final position for securing an upper scaffold level 52. Fig. 17 shows the state in which the left railing post 10.1 is also connected in the (temporary) upper position.

[0068] Fig. 18 shows the condition of a connected leading guardrail with three scaffold bays of scaffold 50 according to the assembly state of Fig. 17 .

[0069] Fig. 19 shows the further assembly progress starting from the state according to Fig. 18 . Thus, after the installation of the leading railing according to Fig. 18 The decking 62 is hung in the crossbeams 60.1 of the vertical frames 56, so that the upper scaffold level 52 can be accessed by the assembly personnel, with side protection simultaneously provided by the leading guardrail with its guardrail posts 10.1 and the temporary guardrail rails 20. Then, as in Fig. 19 As shown, the vertical frames 56 of the lower scaffold level 54 are attached to the vertical frames 56, whereby, with regard to the further assembly progress, the guardrail posts 10.1 are successively moved to the level of the upper scaffold level 53, so that side protection is provided for a further scaffold level to be assembled.

[0070] In Fig. 20 The connection of a guardrail post 10.2 to the vertical upright 58.2 of a modular scaffold, for example the Layher Allround scaffold ®< (registered trademark) system, is shown. The Fig. 20 The connection situation of the second connection device 14 shown corresponds to the detailed representation of Fig. 6 and the connection situation of the third connection device 16 corresponds to the detailed representation of Fig. 7 .

[0071] The modular scaffold consists of two parallel, spaced-apart vertical uprights 58.2 with longitudinally arranged rosettes 66 with recesses, which are connected to each other at the upper and lower ends via crossbars 60.2 using a wedge-head connection. Longitudinal rails 63 are connected to the rosettes 66 at the upper and lower ends of the vertical uprights 58.2 along the length of the scaffold. Guardrails 68 are connected to the rosettes 66 in the middle section.

[0072] The Fig. 21 Figure 1 shows a third embodiment of a railing post 10.3, which has essentially the same structural design as the railing post 10.2 according to Figure 1. Fig. 2 , however with the following differences. The railing post 10.3 does not have a safety stop unit 32 and the third connection device 16 - shown in more detail in Fig. 22 - differs from the third connection device according to Fig. 3 by forming a projecting unit 38.1 extending downwards in the longitudinal direction L onto the first connection area 34, which is designed as a curved profile unit, wherein the curvature contour is designed such that the free end area of ​​the projecting unit 38.1 is curved towards the railing post 10.3. Identical components bear the same reference numeral and are not explained again.

[0073] The guardrail post 10.3 has the advantage that it can be used with both a facade scaffold (Layher Blitz Scaffold® (registered trademark) system) and a modular scaffold (Layher Allround Scaffold® (registered trademark) system). Its assembly and disassembly on a vertical standard 58.1 or 58.2 of a scaffold 50 is carried out in the same manner as described above, just as with guardrail posts 10.1 and 10.2.

[0074] When mounting the railing post 10.3 to a vertical post 58.1 with rosettes 66, the curved projection unit 38 is threaded into a recess in the rosette, then the railing post 10.3 is brought into a vertical position and the second connection device 14 is connected to the vertical post 58.1. In this final mounting position, the railing post 10.3 is secured against lifting upwards in the longitudinal / vertical direction, as the curved projection unit 38.1 blocks any upward movement.

[0075] Removing the railing post from the rosette 66 is only possible if the second connecting device 14 is actively released and the railing post is tilted accordingly so that the curved contour of the projection unit can be moved out of the recess of the rosette.

[0076] In Fig. 25 A fourth non-inventive embodiment of a railing post 10.4 is shown, which basically has the same structure as the railing post 10.3 according to Fig. 21 However, with the difference that there is no second connection area 36 on the third connection device 16, but rather this connection area consists solely of the first connection area 34 with a curved projection unit 38.1 molded onto its underside. Such a guardrail post 10.4 is suitable for connection to a vertical upright 58.2 of a modular scaffold (Layher Allround Scaffold ®< (registered trademark)). The assembly process is analogous to that described above.

[0077] Identical components bear the same reference symbol and are not explained again.

[0078] One variant not shown involves an alternative, structurally different design of the railing post 10.3, which is not the one shown in Fig. 25The first connection device 12.2 and the second connection device 14 shown are used, and the rotary actuation devices 22.1 and 22.2, respectively, and the rotatable shaft are omitted with regard to the second connection device 14. The design of the first and second connection devices 12.2 and 14 must only be such that they fulfill the required functionality, that is, that temporary railing posts can be detachably connected to the first connection device 12.2 and that the second connection device 14 can be detachably locked to a vertical post.

Claims

1. Railing post (10.1, 10.2, 10.3) for scaffolding (50) having scaffolding levels (52, 54) with vertical members (58.1, 58.2) / vertical frames (56) running in a longitudinal direction (L) / vertical direction, with crossbars (60.1, 60.2) running in a transverse direction (Q) / horizontal direction, guard rails (68) and decks (62), for the mounting of a so-called leading railing, by means of which at least one temporary guard rail (20) can be mounted, from an existing lower scaffolding level (54), for an upper scaffolding level (52) to be mounted thereabove, with - a first connection device (12.1, 12.2), - a second connection device (16), - a third connection device (18), wherein - the first connection device (12.1, 12.2) is arranged in the upper end region of the railing post (10.1, 10.2, 10.3), to which at least one temporary guard rail (20) can be releasably connected, - the third connection unit (16) is arranged in the lower end region of the railing post (10.1, 10.2, 10.3), which can be releasably connected to existing components of the scaffolding (50), in particular to the vertical member (58.1) with connected guard rails (68) or a rosette (66) of the vertical member (58.2), - the second connection device (14) is arranged at a distance in the longitudinal direction (L) above the third connection device (16), which can be connected to the vertical member (58.1, 58.2) of the scaffolding (50) in a releasably lockable manner, - the second connection device (14) has a first form-fit unit (24) connected fixedly to the railing post (10.1, 10.2, 10.3) and a movable, in particular rotatable, form-fit unit (26) connected above or below or within the fixed form-fit unit (24), which rotatable form-fit unit is movable from a closed position to a maximum opening position, and vice versa, wherein in the closed position a positive locking of an inserted railing post (10.1, 10.2, 10.3) on a vertical member (58.1, 58.2) of the scaffolding (50) is obtained, - the third connection device (16) is designed as a protrusion device running in the transverse direction (Q), with - a first connection region (34) connected to the railing post (10.1, 10.2, 10.3, 10.4), - wherein the first connection region (34) has a downwardly facing, in particular curved, protrusion unit (38, 38.1), - characterized in that - the third connection device (16) is designed as a protrusion device running in the transverse direction (Q), with - a second connection region (36) connected to the first connection region (34) in the transverse direction (Q), - wherein the second connection region (36) has a recess (40) that is open downwards in the longitudinal direction (L).

2. Railing post according to Claim 1, - characterized in that - the rotatable form-fit unit (26) is designed as a hook unit, which has an inclined front end contour in its free front end region (51).

3. Railing post according to Claim 2, - characterized in that - the fixed form-fit unit (24) and the rotatable form-fit unit (26) have, at least in some sections, a part-circular inner contour profile which corresponds to the outer contour profile of the vertical member (58.1, 58.2), wherein, seen in a plan view in the closed position of the rotatable form-fit unit (26) together with the fixed form-fit unit (24), a complete or almost complete circular inner contour results, which securely locks the inserted vertical member (58.1, 58.2) in a form-fitting manner.

4. Railing post according to one or more of the preceding claims, - characterized in that - the rotatable form-fit unit is rotatable via an upper rotation actuation device, wherein the upper rotation actuation device (22.1) is arranged below the first connection device (12.1, 12.2).

5. Railing post according to one or more of the preceding claims, - characterized in that - the second connection device (14) is arranged within the railing post (10.1, 10.3) in such a way that when the railing post (10.1) is connected to the vertical member (58.1), it is arranged directly below a protruding component of the scaffolding, in particular a gusset plate (64), so that a displacement in the longitudinal direction (L) is blocked.

6. Railing post according to one or more of the preceding claims, - characterized in that, in the end region of the first connection unit (12.1), there is in each case at least one connection unit (72) for the temporary guard rail (20).

7. Railing post according to Claim 6, - characterized in that - the connection units (72) each have a tilting pin (74).

8. Railing post according to Claim 1, - characterized in that - the second connection region (36) has an outwardly open receiving unit (48) with two spaced-apart legs, on each of which the downwardly open recess (40) is formed.

9. Railing post according to Claim 1, - characterized in that - the protrusion unit (38.1) is designed as a curved profile unit, in particular curved towards the railing post (10.1, 10.3).

10. Scaffolding (50) having vertical frames (56) with vertical members (58.1), and with crossbars (60.1) which connect the vertical members (58.1) in the transverse direction (Q) and are connected via a gusset plate (64), and with guard rails (68) connected to the vertical members (58.1), - with a connected leading railing with railing posts (10.1, 10.3) according to one or more of the preceding Claims 1 to 9, - wherein temporary guard rails (20) are connected to the first connection device (12.1) on both sides, - the third connection device (16) is suspended in the existing guard rails (68) via its downwardly open recesses (40) of the second connection region (36), in the region where the existing guard rails (68) are connected to the vertical member (58.1), - the vertical member (58.1) runs through the open recess (48) of the second connection region (36), and - the second connection device (14) is connected to the vertical member (58.1) directly below the gusset plate (64), and therefore an upward displacement in the longitudinal direction (L) is blocked.

11. Scaffolding (50) having vertical members (58.2), with rosettes (66) which have recesses and are connected in the longitudinal direction (L) in a predetermined unit spacing, and having crossbars (60.2) which connect the vertical members (58.2) to the rosettes (66) in the transverse direction (Q) by means of a wedge-head connection, and guard rails (68) connected to the rosettes (66) of the vertical members (58.2), - with a connected leading railing with railing posts (10.2, 10.4) according to one or more of the preceding Claims 1 to 9, - wherein temporary guard rails (20) are connected to the first connection device (12.2) on both sides, - the third connection device (16) is inserted, via its in particular curved protrusion unit (38) facing downwards in the longitudinal direction (L), into a recess of the rosette (66) to which the existing guard rails (68) are connected, so that a displacement in the longitudinal direction (L) is blocked by the safety stop unit (32) or by the curved contour of the protrusion unit (38), - the second connection device (14) is connected to the vertical member (58.2).

12. Method for implementing a leading railing on scaffolding, in particular according to Claim 10 or 11, with railing posts (10.1, 10.2, 10.3, 10.4) according to one or more of Claims 1 to 9 connected to vertical members (58.1, 58.2), from an existing secured scaffolding level (54), for a further scaffolding level (52) to be mounted thereabove and secured, characterized by the following method steps: - releasing the second connection device (14) from the vertical member (58.1, 58.2), - tilting the railing post (10.1, 10.2, 10.3, 10.4) outwards, - lifting the railing post (10.1, 10.2, 10.3, 10.4) upwards in the longitudinal direction (L) to release the third connection device (16) from the vertical member (58.1, 58.2), - lifting the railing post (10.1, 10.2, 10.3, 10.4) further upwards in the longitudinal direction (L) until the height of the existing guard rail (68) is reached, - attaching the third connection device (16) at the height of the rosette (66) onto connected existing guard rails (68) by inserting the in particular curved protrusion unit (38.1) into a recess of the rosette (66) or at the height of the connection of the existing guard rails (68) to the vertical member (58.1) by attaching the second connection region (36) with the recesses (40) into the existing guard rails (68), - tilting the railing post (10.1, 10.2, 10.3, 10.4) in the direction of the vertical member (58.1, 58.2) of the scaffolding (50) for connecting the railing post (10.1, 10.2, 10.3, 10.4) to the vertical member (58.1, 58.2) via the second connection device (14), - connecting the second connection device (14) to the vertical member (58.1, 58.2).

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