ES2985157T3 - Front railing, scaffolding with said front railing and method of securing the front of a scaffold - Google Patents

Abstract

The invention relates to a front railing for securing a front side of a walkable scaffold, in particular during the assembly of this walkable scaffold, comprising a safety support having a protection section intended to prevent a person from falling from a walkable scaffold and also having a fixing section intended to attach the front railing to the scaffold. The front railing also comprises at least two vertical pins which are each intended to be inserted into a scaffold receptacle of the scaffold. The invention also relates to a scaffold with such a front railing and to a method for securing the front side of a scaffold against people falling during the assembly of the scaffold. (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Front railing, scaffolding with said front railing and method of securing the front of a scaffold

The invention relates to a front railing for securing a front side of a walkable scaffold, in particular during the construction of this walkable scaffold according to claim 1 of the patent, as well as to a scaffold with said front railing according to claim 8 of the patent. The invention further relates to a method for securing the front side of a scaffold against falls of persons during the assembly of the scaffold according to claim 13 of the patent.

Scaffolding is used in the construction industry for a variety of tasks. Facade scaffolding is used to design the exterior surfaces of buildings, for example to paint them. In civil engineering, scaffolding or trusses are used to place and fasten the most diverse construction elements. Such construction elements can be, for example, prefabricated concrete elements, steel beams or steel structures. In addition, elements necessary for the construction of structures, such as temporary structures or formwork with trusses, can be placed. Finally, scaffolding is also used in the service or inspection area, for example to bring workers safely to system parts that need to be checked in large process engineering plants, such as refineries. In general, the basic requirements for scaffolding are that it is easy to transport and easy to assemble. Scaffolding is usually built from the bottom up. This means that the next upper floor is built from the scaffold floor below. While the next floor above is under construction, there is a higher risk of fall accidents, as the next floor is not yet fully constructed and does not have all the necessary fall safety measures in place. This means that the most necessary safety precautions must be installed from the floor below to the next floor before workers enter and complete the next floor. As an alternative to safety precautions mounted on scaffolding, workers can also be protected when erecting the next floor above by wearing personal protective equipment while working on the next floor not yet secured. However, such personal protective equipment is expensive and time-consuming to set up and attach to the scaffolding.

Document DE 102015206276 A1 discloses a safety railing which can be mounted from one floor to the front of the next higher floor of a scaffold. After assembly, this safety railing is arranged between two vertical scaffold elements on the next higher floor. The disadvantage of this railing is that if it is removed again in the garage immediately above, there is no fall protection at the front.

EP 2216465 B1 discloses a main railing device which can be fixed from below to the next floor above. The disadvantage of this railing device is that it has very large dimensions and has moving guides and parts. This railing device is therefore complicated to install and handle, as well as difficult to manufacture.

Document JPH10159323 A discloses a guardrail for the front of a scaffold, which is attached by hooks to horizontal scaffold elements of existing scaffold floors. For safety reasons, a movable locking mechanism is provided, which must be activated when installing and dismantling the guardrail from the scaffold. The handling of this guardrail is complicated and the longitudinal dimension of the guardrail is large, which makes its transportation cumbersome.

It is therefore the aim of the invention to propose a solution for securing the front part of a scaffold, which provides protection against falls at all times and which is easier to handle than the prior art.

This objective of the invention is solved by a front railing for securing a front side of a <trafficable> scaffold, according to claim> 1<.>

The safety bracket of a front railing according to the invention effectively prevents workers or other persons standing on the corresponding floor of the scaffold from falling, as long as the open side on the front side of a scaffold is blocked. The safety bracket has two sections, the protective section arranged at the top when installed and the fixing section arranged below. The protective section is constructed in such a way that it effectively blocks the open side of the scaffold. A U-shaped configuration has proven particularly suitable for this function, which is additionally provided within the U with one or more fastening elements and is therefore closed. The fixing section is used to fix the front railing to the scaffold. For this purpose, the fixing section has at least two fastening elements. These two fastening elements are arranged at a distance from each other, this distance conveniently corresponding approximately to the width of the scaffold or to the distance between two elements extending vertically on the front side of the scaffold. The fastening elements define a fixing plane with one of their surfaces. The safety bracket of the front rail according to the invention has one side which faces the scaffold during assembly on a scaffold and an opposite side which faces away from the scaffold during assembly. The outermost surfaces of the fastening elements on the side which faces the scaffold during assembly define the fixing plane. The fixing plane thus represents the outermost plane of the safety bracket, which faces the scaffold when mounted on the scaffold. The fixing plane is an imaginary plane which serves to define further features of the front rail according to the invention.

A front railing according to the invention furthermore has two vertical pins which are intended to be connected to the scaffolding and thus serve to fasten the front railing to the already constructed scaffolding part. With the front railing assembled, the vertical pins run in a vertical direction and are arranged at a certain distance from the adjacent fastening elements. The connections between fastening elements and vertical pins form the fastening zones arranged between fastening elements and vertical pins. When installing the front railing on the scaffolding, the vertical pins are inserted into recesses which are generally oriented horizontally. After the vertical pins have been inserted into the recesses, the fastening zones rest on parts of the already constructed scaffolding. The vertical pins are arranged in the lower half of the fastening section when installed. Conveniently, the vertical pins end flush with the lower ends of the fastening elements. Due to this arrangement of the vertical pins in the lower area of the safety bracket, the front railing has a compact vertical dimension, which makes it easy to transport and easy to handle. The vertical pins of a front railing according to the invention are intended to be inserted into recesses that are fixed to the upper end of the already constructed part of the scaffold. Railings of the prior art are partly fixed to scaffold elements that are arranged lower than the upper end of the existing floor. Therefore, such railings of the prior art must have larger dimensions in the vertical direction, which leads to disadvantages due to the greater weight and larger dimensions of these railings. In a front railing according to the invention, the vertical pins are arranged outside the fixing plane and are located on the side of the fixing plane facing the scaffolding in the assembled state. Since the vertical pins used for the connection to the scaffold are arranged outside the fixing plane, the safety bracket in the assembled state is located at a certain distance from the existing or yet-to-be-assembled vertical scaffold elements. The safety bracket is therefore arranged outside the other scaffold elements. This has a decisive advantage: thanks to this external arrangement, the space between two adjacent vertical scaffold elements on the next higher floor is free. In this way, another permanently fixed front guardrail can be arranged in this space, while the front guardrail according to the invention protects this opening against falls. It is possible to install a front guardrail according to the invention and a standard guardrail, which then remains permanently on the scaffold to secure the front side, parallel to each other. This means that the worker is protected against falls at all times on the front side of the scaffold. The front guardrail according to the invention is only removed from the scaffold when the standard guardrail is assembled. The front guardrail can be used again to secure the next floor above. This means that each front face of the scaffold only requires one front guardrail according to the invention during construction. The simple design of the front guardrail according to the invention and its ergonomic handling also ensure that the workers accept the use of this guardrail. This ensures that the intended safety devices, in particular the protection of the front part of a scaffold, are observed at all times in practice. In the case of complicated safety guardrails, it is to be expected that in practice workers will not use these safety measures at all, but, due to time pressure, simply build the scaffold without securing the front part. A front guardrail according to the invention thus combines proper front-side safety with acceptance by the persons responsible for the construction of the scaffold.

The front guardrail comprises at least one guide, which is intended to secure the front guardrail against tilting with respect to vertically extending scaffolding elements at least in one spatial direction, the guide being firmly attached to the guard section and having at least two legs spaced apart from each other in a horizontal direction, the guide protruding from the guard section in the direction from which the fixing plane points towards the scaffolding when mounted on the scaffold. In this embodiment at least one guide is provided which, in addition to the vertical pins described above, establishes a further connection between the front guardrail and the scaffold. Thanks to the guide, the front guardrail is connected to the scaffolding at two places at different vertical heights. This provides improved protection against workers falling. The guide is connected to vertical elements of the scaffolding, in particular to vertical posts, which belong to the immediately upper floor of the scaffolding under construction. The guide secures the front guardrail against tilting at least in one direction.

In order to protect against falls, it is particularly important that the front rail cannot tilt away from the front side of the scaffold. Furthermore, it is important that the front rail cannot tilt parallel to the front of the scaffold. The guide has two legs spaced apart from each other, which can span vertically extending scaffold elements. The guide, like the vertical pins, also protrudes from the mounting plane and is therefore arranged outside the safety bracket. This also results in the second connection point of the front rail, namely between the guide and the vertically extending scaffold elements, the safety bracket being placed outside the front side of the scaffold when the front rail is fixed to the scaffold. This also ensures that in the area of the guide, the space between two vertical scaffold elements, in particular vertical posts, remains free so that, in addition to the front rail, a permanent standard rail can be installed on the front side of the scaffold.

Furthermore, the proposal advantageously provides for the two legs of the guide to have different shapes. In this embodiment, the two legs of a guide have a different shape. This means that the guide can be easily and safely mounted on the scaffolding without having any moving parts.

In a preferred embodiment of the proposal, it is provided that a first leg has a hook-shaped functional area and a second leg has a flat functional area, the functional areas being provided for interaction with scaffolding elements. The functional areas are the areas of the legs that come into contact with other scaffolding elements. In this embodiment, a first leg has a hook-shaped functional area, which is intended to at least partially surround a vertically extending scaffolding element, in particular a vertical post. This hook-shaped area is designed such that the front railing is engaged behind a vertical post in the assembled state, so that the front railing cannot be accidentally removed from the scaffolding. The second leg has a flat functional area and forms a counter support for the leg with the hook-shaped functional area. When assembled, the leg with the flat functional area does not extend behind the vertical scaffolding elements.

It is further provided that at least two guides are provided which, when mounted on the scaffold, are arranged horizontally spaced apart from each other in the protective section. In this embodiment, two guides are provided, each of which is expediently arranged on a leg of the U-shaped safety bracket in the area of the protective section. By providing two guides, the attachment of the front rail to the vertical elements of the scaffold is further improved. In some cases, when constructing the next floor of the scaffold, there is only one vertical post. The presence of two guides ensures that, regardless of which side this single vertical post is located, a second connection is always established between the front rail and the front of the scaffold.

In an advantageous embodiment, the legs with a flat functional area are arranged at a smaller horizontal distance from one another than the legs with a hook-shaped functional area. In this embodiment, the legs with the flat functional area are arranged further inward than the legs with the hook-shaped functional area in the protective section.

It is cleverly provided that in the assembled state on the scaffolding, a leg with a flat functional area of a first guide is arranged above a leg with a hook-shaped functional area and, on a second guide horizontally separated from the first guide, a leg with a flat functional area is arranged below a leg with a hook-shaped functional area. In this embodiment of a front rail with two guides, the legs of the two guides are arranged differently in the vertical direction. On the one hand, a leg with a hook-shaped functional area is above a leg with a flat functional area. For the guide on the opposite side, the arrangement is exactly the opposite. This embodiment allows the front rail to be mounted or dismounted by means of a pivoting movement between two vertical posts, without the need for moving parts. With the front rail in the assembled state, the legs with the hook-shaped functional area are hooked behind the vertical posts and thus secure the front rail. If the front railing is then rotated for dismantling around an axis perpendicular to the fixing plane until the two legs with the flat functional area rest on the vertical posts, then in this connected state the undercut of the legs with the hook-shaped functional areas rises up to the vertical posts and the front railing can be removed from the scaffolding. Thanks to this special arrangement of the individual legs, the front railing can be separated from the vertically extending scaffolding elements or joined to them in a positive fit by means of a rotating movement.

It is provided that the two legs with a hook-shaped functional zone on their side opposite the protection zone have an inner width between them into which vertically extending scaffolding elements can be inserted, this inner width being smaller than the outer distance between two adjacent vertically extending scaffolding elements. In this embodiment, the scaffolding is secured insofar as the end regions of the legs with the hook-shaped functional zone have an inner width between them which is smaller than the outer distance between two adjacent vertical scaffolding posts. As a result, these end regions undercut the vertical posts in the assembled state and the front guardrail is fixed to the scaffolding. Due to the above-described vertically offset arrangement of the two legs with the hook-shaped functional area relative to each other, the effective distance between the end areas of these legs can be increased in the horizontal direction by rotating the front railing, which means that in this rotated state vertically extending scaffolding elements can be inserted between the legs with the hook-shaped functional area. If the front railing is then rotated back to its normal alignment, the effective distance between the two legs is again reduced to the inner width and the front railing is positively connected to the vertical scaffolding elements.

It is further advantageously provided that the two legs with a flat functional area on their side opposite the protection area have a leg spacing from one another that is smaller than the internal spacing between two vertically extending adjacent scaffolding elements. In this embodiment, the two legs with a flat functional area are positioned relative to one another in such a way that they can be inserted with play between two adjacent vertical posts. The legs with a flat functional area, offset relative to one another in the vertical direction, serve as a stop for the rotational movement described above during said rotational movement of the front railing, which serves for assembly and disassembly. In addition, the two legs with a flat functional area prevent the front railing mounted on the scaffolding from tilting parallel to the fixing plane.

Advantageously, the surfaces of the protective section, which face the scaffold when mounted on the scaffold, are arranged in the fixing plane. In this embodiment, the entire safety bracket is designed to be flat. Thus, the surfaces of the protective section facing the frame are also located in the fixing plane, which is defined by the surfaces of the fastening elements of the fixing section facing the frame. For storage, a safety bracket that is flat itself is particularly advantageous. Of course, the protective section and the fixing section can also be arranged offset from each other, in which case the surface of the protective section facing the scaffold does not lie in the fixing plane.

Furthermore, the proposal advantageously provides that the entire front railing is designed rigidly and in particular does not have any moving parts. It is particularly advantageous if the front railing is rigid. This means that the front railing is robust and reliable even under the harsh environmental conditions of a construction site. In the case of railings with moving parts, as is known from the state of the art, these moving parts can become dirty or corroded and are therefore no longer functional. In this case, such railings can pose a significant safety risk if they no longer function as intended. With a rigid front railing, such wear and tear cannot occur on the moving parts, which is very advantageous for longevity and safe operation.

In a preferred embodiment of the proposal, the vertical pins are essentially oriented vertically in the mounted state on the scaffold and are rod-shaped. In this embodiment, the vertical pins are straight, in particular rod-shaped. Rod-shaped base materials are available in many different sizes and strengths, which makes the front railing easy to manufacture. By arranging the vertical pins vertically, they can be inserted particularly easily into the recesses of the scaffold. However, for some applications it may also be advantageous to arrange the vertical pins slightly inclined to the vertical, for example to achieve self-centering. The vertical pins can also be designed to be curved or arched. With these curved vertical pins, the clamping element can be stowed away and the vertical pins can be connected directly to the clamping elements.

Furthermore, it is provided that the fixing zone is arranged at a first end of the vertical pins and the second opposite end of the vertical pins is intended to be inserted into the housings of the scaffold. In this embodiment, the first upper end of the vertical pin is at the same level as the fixing zone, which in turn is fixed to the fastening element with its side opposite to the vertical pin. The second opposite end of the vertical pin is free in space and is intended to be inserted into a housing of the scaffold to establish a connection between the front railing and the rest of the scaffold.

In an advantageous configuration, the vertical pins and the adjacent clamping element areas are arranged in parallel. In this embodiment, the vertical pins run parallel to the adjacent clamping elements. This creates a constant distance between the two parts, which is particularly advantageous when inserting the vertical pins into the scaffolding recesses. The parallel clamping elements can be used as handles, making the front railing easy to handle.

It is cleverly provided that the vertical pins are arranged in a separate plane parallel to the fixing plane. In this embodiment the vertical pins, in particular their central axes, run in a common plane, which in turn runs parallel to the fixing plane. This creates a constant distance between the vertical pin and the fixing section, which in turn ensures that the front railing is arranged parallel to the rest of the scaffolding.

In another preferred embodiment, the vertical pins are provided to have a circular cross-section, with the diameters of the vertical pins being smaller than the recesses in the scaffolding housings. In this embodiment, the vertical pins and the recesses in the scaffolding housings intended to accommodate them have a circular cross-section. The recesses are designed to be slightly larger than the diameter of the vertical pins, so that a clearance fit is created which allows the vertical pins to be pushed into the recesses. Of course, the cross-sections of the vertical pins and the recesses can also have other geometry and, for example, be rectangular or polygonal.

Advantageously, the second end of the vertical pins and the end of the clamping elements remote from the protection section are provided flush with each other. In this embodiment, the clamping elements are flush with the vertical pins. This ensures that there are clamping element areas parallel to the vertical pins that can be used as gripping points when mounting the front railing on the scaffolding.

It is furthermore advantageously provided that a horizontal pin is arranged at the end opposite the protective section of the fastening elements, which points to the corresponding adjacent vertical pin, in particular to its second end, there being a distance between the end of the horizontal pin remote from the fastening element and the vertical pin. In this embodiment, two horizontal pins are provided in the front rail, which run essentially horizontally when installed. These horizontal pins are arranged in the fastening elements and direct their free end towards the vertical pins.

There is a distance between the free end of the horizontal pins and the vertical pins that is greater than the distance occupied by the recesses of the scaffold housing from the edge of the scaffold housing. This makes it possible to insert the vertical pins into the recesses without the horizontal pins coming into contact with the scaffold housing. However, if an attempt is made to insert the vertical pins into other openings that are not intended to attach the front guardrail to the scaffold, the horizontal pins form a stop that prevents the vertical pins from being inserted into these other openings. The horizontal pins prevent the vertical pins from being inserted into openings that are further from the edge of an element than the distance between the free end of the horizontal pins and the vertical pins. The horizontal pins serve to protect against incorrect attachment of the front guardrail to the scaffold and thus ensure greater operational safety.

Advantageously, the protection section and the fixing section are made of a single component. In this embodiment, the front railing is particularly simple and robust. The protection section and the fixing section are part of the safety bracket, which is made in one piece. This embodiment can be implemented particularly easily by bending a single tube. Of course, the protection section and the fixing section can also be initially manufactured separately and then connected to each other, for example by means of plug-in connections, screw connections or welded connections.

The proposal advantageously provides that the guard section has an essentially U-shaped area and that at least one holding element is arranged in this area, which runs horizontally when mounted on the scaffold. A key aspect of the front guardrail is to prevent workers from falling or being thrown off the scaffold. To this end, the guard section must effectively block the front part of the scaffold. A suitable embodiment for this is a U-shaped guard section, where, in addition to completely blocking the space in the U, at least one holding element is arranged. Of course, several holding elements can also be provided. The holding element blocks the space between the legs of the U and also serves as a handle when mounting and dismounting the front guardrail.

In a preferred embodiment of the proposal, the safety bracket is made of a curved tube. As already described above, this embodiment is very simple and inexpensive to produce. At the same time, a safety bracket made from a single piece is highly stable and lightweight, since the connecting elements between the individual parts are eliminated.

The object of the invention is also solved by a scaffold comprising at least one front side, this front side having a base frame with two vertical posts spaced horizontally from each other and two horizontal bars spaced vertically from each other, the horizontal bars connecting the vertical posts to each other, the horizontal bars and the vertical posts together defining an outer surface and at least two scaffold housings having been arranged on the front side;

at least one front railing according to one of the preceding claims,

a vertical pin being inserted into a corresponding scaffolding recess and the fixing plane coinciding with the outer surface or being spaced from the outer surface in a direction pointing away from the rest of the scaffolding. A scaffold according to the invention is shown in Figure 1 and described in the associated description. A scaffold according to the invention can have different sizes, depending on what is needed for a specific application. A scaffold according to the invention always has at least one base frame, which is formed by two vertically extending vertical posts and two horizontally extending horizontal bars. A scaffold according to the invention usually has several such base frames, which form a two-dimensional basic shape of the scaffolding. At least one base frame is arranged on a front side of the scaffolding. There are usually additional base frames that are not arranged on the front side, but are located inside the scaffolding. A base frame arranged on the front side forms the outer surface of the scaffolding on the front side with its surfaces facing outwards. This outer surface forms the outermost end of the scaffold.

At least two scaffolding housings are provided on the front side, in particular on the base frame, which serve to mount the front railing. These scaffolding housings can be firmly connected to the vertical posts or can be formed from separate components which are connected to the vertical posts when the scaffolding is built. Furthermore, a scaffolding according to the invention comprises at least one front railing according to one of the embodiments described above. The vertical pins of the front railing are inserted into the scaffolding housings and ensure that the front railing is securely fastened to the other scaffolding elements. Due to the shape of the front railing, it is located outside the other scaffolding elements, in particular outside the vertical posts. The fixing plane of the front railing coincides with the outer surface of the base frame or the fixing plane is on the side opposite the rest of the scaffolding, spaced from the outer surface. The remainder of the scaffolding is understood to mean all scaffolding elements that are not formed by the front railing. This arrangement of the front railing on or outside the outer surface leaves the space between the two vertical posts of the base frame free, so that, if necessary, a standard railing can be mounted there in addition to and parallel to the front railing. A scaffolding according to the invention thus enables the rapid and safe construction of the floors immediately above. The advantage of a scaffolding according to the invention is that the front railing has no moving parts and is therefore particularly robust. The front railing can thus be stored and transported together with the other rigid scaffolding elements. Like the other scaffolding elements, the front railing is so robust that no special precautions are required for packing and protecting the front railing during transport. A scaffolding according to the invention is therefore suitable for the harsh environmental conditions of a construction site and can therefore be transported and erected in a short time.

In addition, the vertical pins are provided for insertion into recesses in the scaffolding housings. In this embodiment, recesses are provided in the scaffolding housings into which the vertical pins are inserted. Recesses are understood to mean openings that correspond to the vertical pins. The vertical pins are conveniently inserted into the recesses. This means that no tools are required for assembly and disassembly of the front railing, which means that these work steps can be carried out quickly and easily.

In an advantageous embodiment, at least one further vertical post is arranged above the base frame and the guide runs around this vertical post parallel to the horizontal bars, so that the front railing is secured against tilting in this direction. In this embodiment, another vertical post is already installed on this next upper floor for the construction of the next upper floor. When fixing the front railing, the guide is operatively connected to this further vertical post. In addition to the fixing by means of vertical pins in the scaffolding recesses, the front railing is thus connected to the additional vertical post via the guide. The front railing is connected to the scaffolding at two points in vertical height and is thus even better secured. The guide at least prevents the front railing from tilting parallel to the front side. However, there is also a positive connection between the guide and the additional vertical post, which also prevents the front rail from tilting or separating from the scaffold in a direction perpendicular to the outer surface or front side.

Cleverly, the guide is provided with an opening on one side perpendicular to the horizontal bars, the width of which is greater than the outer diameter of the vertical post. In this embodiment, the guide is designed so that it can slide over the vertical post. This sliding is conveniently carried out over the vertical post after first rotating the front rail from the position it occupies in the assembled state. With this embodiment, no moving parts are needed in the guide, which makes it particularly easy to manufacture and robust.

In another preferred embodiment, at least two vertical posts are arranged above the base frame and the front railing covers at least part of the distance between these vertical posts. In this embodiment, two further vertical posts are attached to the next higher floor of the scaffolding, starting from the base frame. In this embodiment, the front railing can also be installed easily and safely to secure the next higher floor.

In addition, it is advisable to arrange a standard railing parallel to the front railing, which is arranged between two vertical posts. In this scaffolding embodiment, a standard railing is already arranged on the front side, parallel to and in addition to the front railing, which additionally protects against falls.

Advantageously, it is provided that the front rail can be removed from the scaffold by first lifting it vertically until the vertical pins are no longer in the scaffolding receptacles and then rotating the front rail around an axis running at right angles to the fixing plane, thereby releasing the positive connection between the guide and the vertical post. In order to remove the front rail from the rest of the scaffolding, only two movements of the front rail are required in this embodiment. First, the front rail is lifted vertically until the vertical pins are out of the recesses in the scaffolding receptacles. The front rail can then be rotated or pivoted in a plane parallel to the fixing plane or outer surface. The positive connection between the guide and the vertical post is then cancelled by rotating along an axis running essentially at right angles to the fixing plane and/or the outer surface of the front side. Once this positive connection has been broken, the front railing can be easily removed from the rest of the scaffold in a direction perpendicular to the front side. This means that the front railing can be removed from the rest of the scaffold easily and without the use of tools.

The objective of the invention is further solved by a method for securing the front side of a scaffold against falls of persons while the scaffold is being assembled, comprising the following steps:

• construction of a first floor of the scaffold on the ground, the first floor having at least two base frames with two vertical posts spaced horizontally from each other and two horizontal bars spaced vertically from each other, the horizontal bars connecting the vertical posts to each other and a scaffold housing being arranged adjacent to at least one horizontal bar on each vertical post and the at least two base frames being oriented vertically, the scaffold housings being located at the top of the base frame and the corners of one base frame being connected to the corners of the other base frame by horizontal struts, at least one base frame being arranged on a front side of the scaffold and the horizontal bars and the vertical posts of this base frame as a whole defining an outer surface,

• insertion of at least one rung at the top of the first floor of the scaffold, the rung being connected to the upper horizontal bars and/or to the upper horizontal struts,

• connection of at least one further vertical post to the upper end of the first floor base frame arranged on the front side, the vertical post being arranged vertically above the first floor and belonging to the second floor of the scaffold, the other vertical post being connected only if none of the first floor vertical posts protrudes as far as the second floor of the scaffold,

• fixing a front rail according to one of the embodiments described above, the front rail being fixed exclusively from the first floor of the scaffold by a person and first raised upwards off the outer surface to the height of the second floor, the front rail being then rotated about a spatial axis arranged vertically to the outer surface and in this rotated state a guide being guided by the at least one further vertical post on the second floor, the front rail being then rotated backwards about the same spatial axis until the fastening elements are vertically aligned and this backward rotation creates a positive connection between the guide and the further vertical post, and the vertical pins then being inserted into the housings of the scaffold, the front rail being moved vertically downwards until the fixing area rests on the housings of the scaffold, the safety bracket of the front rail being fixed outside the outer surface of the scaffold.

A method according to the invention serves to secure the front sides of the upper floors of a scaffold against people falling. Scaffolds are usually erected on the ground or underground. Since the first floor of the scaffold is located directly on the ground, no protection is required to prevent people from falling. This protection is only necessary from the second floor onwards. A method according to the invention is therefore initially based on the construction of the first floor of the scaffold arranged on the ground. This construction of the first floor is based on the state of the art. In order to achieve a stable first floor of the scaffold, at least two base frames are connected to each other, each consisting of two vertical posts and two horizontal bars connected by horizontal struts. The horizontal struts are fixed at their corners at right angles to the base frames. In this way, a cubic structure is created consisting of scaffold elements. A step is then placed on top of the first floor of the scaffold, which serves as a support surface for the second floor. At this point it is dangerous to step on the step, as the resulting second floor is not yet secured against falls. In some cases, a vertical post from the first floor extends to the second floor. In this case, a front railing can be connected directly to this vertical post. If there are no vertical posts on the front side of the second floor, at least one additional vertical post is first fixed to the second floor, which then extends vertically upwards as an extension of the vertical post below. This additional vertical post is fixed by a person who is on the first floor of the scaffold and therefore cannot fall. At this point it is also possible to fix two further vertical posts from the first floor to the second floor. A front railing according to the invention can be fixed simultaneously to one or two vertical posts. A front railing is then fixed to the front of the second floor, also from the first floor. To do this, the front railing is lifted from below and first turned or rotated so that its guides can slide along the vertical post(s) of the second floor. This rotation occurs around a spatial axis which is arranged perpendicular to the outer surface or front side of the guardrail. In this rotated state, the front guardrail with its guides is pushed onto the vertical posts. Once the vertical posts have been inserted into the guide(s), the front guardrail is rotated backwards around the described spatial axis. This creates a positive connection between the front guardrail and the vertical posts. The details of this positive connection, for which no moving parts are required, are described for the embodiments of the front guardrail and also apply to the method according to the invention. Once the backward rotation is completed, the clamping elements are aligned vertically again. In this state, the guides can be moved in a vertical direction along the vertical posts. The front guardrail now moves vertically downwards and its vertical pins are inserted into the scaffolding housings, in particular into recesses in the scaffolding housings. Finally, the front railing with the inserted vertical pins is moved vertically downwards until the fixing areas rest on the scaffolding supports. In this state, the front railing is firmly attached to the rest of the scaffolding. Due to the vertical pins inserted into the scaffolding supports, the front railing can no longer rotate around the spatial axis described above, so that the positive connection between the guides and the vertical posts cannot be undone. Advantageously, the described procedural features should be carried out exactly in the order mentioned.

In a preferred embodiment, the method includes the additional step of

• fixing a second vertical post on the second floor of the scaffold adjacent to the already existing other vertical post, this second vertical post being fixed parallel to the other vertical post on the front side of the scaffold, a person standing on the rung and secured against falling by means of the already mounted front guardrail guiding the second vertical post in a vertical movement by means of a second guide and connecting it to the vertical post of the first floor below. In this further preferred method step, after fixing the front guardrail to the second floor, a second vertical post is fixed on the front side, provided that no vertical post has yet been arranged at this location. The additional second vertical post is first pushed from above through the still free second guide and then attached to the base frame of the first floor. This work step is carried out from the second floor of the scaffold, since its front side is already protected against falling by the installed front guardrail. In this state, additional elements can be fixed to the second floor of the scaffold.

Conveniently, the method is expected to include the additional steps of

• fixing a standard guardrail between the vertical posts on the front side of the second floor of the scaffold, the standard guardrail being intended for permanent protection of the front side against falls and the standard guardrail being arranged and fixed parallel to the front guardrail,

• and dismantling the front guardrail, which is first lifted vertically upwards by a person standing on the second floor rung until the vertical pins are no longer in the recesses of the scaffold, then rotating the front guardrail around a spatial axis perpendicular to the outer surface until there is no longer a positive connection between the guides and the vertical posts of the second floor and finally separating the front guardrail from the outer surface and thus separating it from the rest of the scaffold. In further preferred method steps, which are carried out according to the method steps described above, a standard guardrail is first mounted on the front side parallel to the front guardrail and remains permanently on the scaffold. It is particularly advantageous that this standard guardrail can be installed parallel to the front guardrail. In this way, the person assembling the standard guardrail is already protected against falls during its assembly by the installed front guardrail. Once the standard guardrail has been attached, it protects the front of the corresponding floor, so the front guardrail is no longer needed. In the following steps, the front guardrail is removed again by first moving it vertically upwards until the vertical pins are no longer engaged with the scaffolding retainers. It is then rotated again around the spatial axis to remove the positive connection between the guides and the vertical posts. In this rotated state, the front guardrail can be removed from the scaffolding along the described spatial axis. This front guardrail is conveniently used to secure the next higher floor of the scaffolding.

Furthermore, it is provided that, starting from the second floor of the scaffold, the steps claimed in the preceding claims are repeated starting from the first floor for fixing the front railing, fixing the vertical posts, fixing the standard railing and dismantling the front railing for all subsequent floors of the scaffold upwards in the vertical direction. The use or method for securing the front side of a scaffold for the second floor of this scaffold has been described above. Naturally, the described method steps can also be carried out for all other floors of the scaffold, in order to secure the immediately upper floor during construction against people falling from the front side. It is particularly advantageous that only one front railing is needed for each front side of the scaffold, which is always pre-fixed to the next higher floor. After parallel assembly of a standard railing, this front railing can be used again for the next floor. For fixing according to the described method only a small number of front railings are required, so little effort is required for the provision and transport of the scaffolding elements used for safety.

The Figures schematically show embodiments of the invention. It is shown in:

Figure 1 is a perspective view of an embodiment of a scaffold according to the invention, Figure 2 is a perspective view of an embodiment of a front railing,

Figure 3, a front view of the front rail of Figure 2,

Figure 4, a side view of the front railing of Figure 2,

Figure 5, a top view of the front railing of Figure 2,

<Figure>6<, a detailed perspective view of a scaffold with a front guardrail,>

Figure 7, a detailed perspective view of a scaffold with a standard guardrail,

<Figure>8<, a detailed perspective view of a scaffold with a standard guardrail and a front guardrail.

In the figures, the same elements are designated by the same reference numbers. In general, the described properties of an element that are described for one figure also apply to the other figures.

Figure 1 shows a perspective view of an embodiment of a scaffold 100 according to the invention. The <scaffold> 100 <shown can be used, for example, as a facade scaffold, without limiting its applicability to a facade scaffold. The scaffold 100 has vertically extending, horizontally extending and diagonally extending elements. The scaffold 100 has four floors on which people can walk. Naturally, the scaffold 100 can also include a different number of floors. The vertically extending elements <of the scaffold are, for example, the vertical posts >102 <, which run between vertically adjacent planes. In the simplest case, these vertical posts 102 consist of cylindrical metal tubes, which at their ends have interfaces for connection to other scaffold elements.

Of course, the vertical posts 102 can also be configured in another way, for example, have a rectangular cross section or be composed of another material, for example, bamboo.

Horizontal bars 103 are arranged between the vertically extending vertical posts 102. Two adjacent vertical posts 102 each form a base frame 106 with two horizontal bars 103 arranged parallel to one another and at right angles to the vertical posts 102. Such a base frame 106 is shown symbolically shaded at the bottom left. Base frames 106 can be found in many other places on the scaffold 100 and are a two-dimensional basic unit of this scaffold 100. The narrow side of the scaffold facing towards the front left is called the front side of the scaffold 100. The base frame 106, shown shaded, forms part of the left-facing front side of the scaffold 100. The longitudinal side of the scaffold 100 runs at right angles to the front side. Several horizontal struts 109 run horizontally in the longitudinal side direction. These horizontal struts 109 connect adjacent base frames 106 to one another in the longitudinal side direction.

Scaffolding supports 104 are arranged on at least some of the vertical posts 102, which can be seen in detail in Figure 6 to Figure 8. These scaffolding supports 104 are interfaces for connecting different scaffold elements to one another. The scaffolding supports 104 can be used, for example, to connect the vertical posts 102 with horizontal bars 103 or horizontal struts 109. It is also possible to design the scaffolding supports 104 as separate components, i.e. not as components of the vertical posts 102. In the front-left area of the scaffolding 100, diagonally extending elements are arranged between two horizontal struts 109, which serve to additionally stabilize the scaffolding 100. However, these diagonal elements are not always absolutely necessary. The base frames 106 arranged on the front side form an outer surface 105 with its surface facing outwards, i.e. with the surface forming the temporary end of the scaffold 100 in a plan view of the longitudinal side of the scaffold 100. This outer surface 105 is an imaginary auxiliary plane defining the outer boundary of the scaffold 100 on the front side. All elements which are situated on the side of the outer surface 105 opposite the frame are referred to as outside the frame. In order to enable people to safely walk on the scaffold 100 for work, the three upper floors each have rungs 112. Each of these rungs 112 is mounted on the frame which extends horizontally between two horizontal struts 109 and two horizontal bars 103, for example, suspended on these frames. In order to prevent workers from accidentally falling off the scaffolding on the higher floors, guardrails are installed. In the longitudinal direction there are the longitudinal guardrails 111 and on the front side of the scaffold the standard guardrails 110. The longitudinal guardrails 111 and the standard guardrails 110 are <fixed and permanently mounted on the scaffold>100<and remain there while work is being carried out.>

On the upper floor of the scaffold 100, front guardrails 1 are attached on both sides. When the scaffold 100 is built in a vertical upward direction, the next floor is built from the floor below. This state of the structure of the next floor is particularly critical since in this state not all safety elements have been arranged on the next floor. The front guardrail 1 is suitable for being mounted from the floor below on the next floor above without the worker having to access the upper floor. If during construction the worker climbs to the next floor above, the front is already secured against falls by the front guardrail 1. The front guardrail 1 is therefore designed in such a way that it can be installed very easily and quickly from the floor below. While the front guardrail 1 is attached to the upper floor of the scaffold 100, the other elements of the upper floor are installed and fixed. In order to permanently protect the upper floor against falls, a standard guardrail 110 is finally fixed to the front sides. This standard guardrail 110 can be fixed parallel to it, within the front guardrail 1, while the front guardrail 1 still remains on the scaffold 100. This condition can be seen in detail in Figure 8. Finally, the front guardrail 1 can be removed from the scaffold again, and the front side of the corresponding floor is secured with the standard guardrail 110. The front guardrail 1 can then be used to build the next upper floor. Of course, a front guardrail 1 can also be used to permanently secure the front side of a floor of the scaffold 100.

Figure 2 shows a perspective view of an embodiment of a front railing 1. The front railing 1 is shown here without scaffolding 100. The largest component of the front railing 1 is the safety bracket 2. The safety bracket 2 is here formed from a curved steel tube. The safety bracket 2 has two sections, the upwardly facing protection section 21 and the downwardly facing fixing section 22. The uppermost protection section 21 is essentially U-shaped and forms the part of the front railing 1 which is to protect the worker against falling from the scaffolding 100. This U-shaped area blocks the front side of the scaffolding 100 when the front railing 1 is mounted thereon. A holding element 211 is furthermore arranged between the two legs of the U-shaped area of the protection section 21. This clamping element 211 also locks the area between the legs of the protective section 21. In the case shown, the clamping element 211 is formed by a welded tube. Of course, the clamping element 211 can also be fixed in another way, for example by means of a plug-in connection or by means of screw connections. At the same time, the clamping element 211 serves as a gripping point where the worker can comfortably hold the front railing 1 during assembly or disassembly on the scaffold 100. As shown, the protective section 21 can consist of two parts that are firmly connected to each other. Alternatively, the protective section 21 can also be composed of several parts that, in the assembled state, are always firmly connected to each other. The fixing section 22 is arranged below the protective section 21. This fastening section 22 serves to fasten the safety stirrup 2 to the scaffold 100. In the embodiment shown, the fastening section 22 comprises two vertically oriented fastening elements 221. These fastening elements 221 are designed here as straight cylindrical tubes. The distance between the two fastening elements 221 is greater than the distance between the two legs of the annular region of the protection section 21. This means that the safety stirrup 2 is wider in the fastening section 22 than in the protection section 21. The distance between the two <fastening elements> 221 essentially corresponds to the distance between two adjacent vertical posts> 102 of the scaffold 100. The width of the protection section 21 is smaller than the distance between two adjacent vertical posts 102 of the scaffold 100. Each of the two fastening elements 221 are connected to the two legs of the U-shaped protection section 21 by means of an S-shaped tube section. Conveniently, the entire safety stirrup 2 is bent from a single tube. Therefore, the fastening section 22 and the protection section 21 are manufactured from a single component and are fused together. The fastening elements 221 can also have a linear shape other than that shown. The clamping elements can be designed, for example, curved or S-shaped. The clamping plane 222 is an imaginary auxiliary plane and is shown as a rectangle in Figure 2. The clamping plane 222 is defined by the surface of the two clamping elements 221, which in Figure 2 faces the rear right. The clamping plane 222 rests on the surface of the two <clamping elements> 221 <facing> oriented rearward on the right and thus symbolizes the boundary of the section > 22 <clamping> oriented towards the scaffold 100. In the lower half of the two clamping elements 221, vertical pins 3 oriented rearward on the right are fixed, which are connected to the clamping elements 221 by means of a clamping zone 31. The vertical pins 3 and the clamping zones 31 extend beyond the clamping plane 222 towards the rear right. The vertical pins 3 are thus arranged outside the fixing plane 222 on the side facing the scaffolding 100. The fixing areas 31 with the vertical pins 3 connected thereto can be fixed at right angles to the fixing plane 222. In the illustrated case, however, the two fixing areas 31 extend at an angle to one another so that they are oriented towards the respective opposite clamping element and have an angle to the fixing plane 222 of less than 90°. In this case, the vertical pins 3 are straight and cylindrical and made of solid steel. Of course, the vertical pins 3 can also have a different cross-section or be formed from a tube. The fixing areas 31 are here designed as iron plates and are therefore cube-shaped. The fastening areas 31 are welded to the fastening elements 221, on the opposite side of the fastening areas 31, the vertical pins 3 are welded to the fastening areas 31. Of course, the vertical pin 3 and the fastening area 31 can also be connected to each other and to the fastening element 221 by other connections, for example a screw connection. In the case shown, the lower ends of the vertical pins 3 end flush with the lower ends of the fastening elements 221. The vertical pins 3 and the fastening elements 221 run parallel to each other. A horizontal pin 5 is fastened to the lower end of the fastening elements 221, a horizontal pin 5 being visible in Figure 2 only on the left side. The horizontal pins 5 are fastened at the same height as the downward-pointing end of the vertical pins 3 and point towards the vertical pins 3. There is a distance between the ends of the horizontal pins 5 pointing away from the fastening elements 221 and the lower ends of the vertical pins 3. When mounting the front guardrail 1 on the scaffold 100, the vertical pins 3 are inserted into the scaffold housings 104. The horizontal pins 5 ensure that the vertical pins 3 are actually inserted into the scaffold housings 104 provided for this purpose and are not incorrectly connected to other scaffold elements. The horizontal pins 5 reduce the distance between the lower end of the fastening elements 221 and the lower end of the vertical pins 3. If an attempt is made to insert the vertical pins 3 into scaffold elements that are not intended for this purpose, the horizontal pins 5 rest on these scaffold elements that are not intended for this purpose and make insertion of the vertical pins 3 impossible. The horizontal pins 5 are made here of <iron plate or steel plates and are welded to the lower ends of the fixing elements> 221.

Viewed in the vertical direction, two guides 4 are arranged approximately in the centre of the guard section 21. These guides 4 each include two legs 41, which are permanently and firmly fixed to the legs of the U-shaped area of the guard section. The two legs 41 of a guide 4 have different shapes, which can be seen particularly well in Figure 2 in the right-facing, forward-facing guide 4. Further details of the guides can be seen in Figure 3 to Figure 5. The two legs 41 are arranged one above the other in the vertical direction. The upper leg 41 has a flat functional area, the lower leg 41 has a hook-shaped functional area. The guide 4 is intended to come into operative connection with vertically extending elements of the scaffolding 100. Via the guide 4, a further connection is established to the scaffolding 100 at the front railing 1 in the assembled state on the scaffolding 100. The front railing 1 is thus positively connected to the scaffolding on the one hand by means of the vertical pins 3 inserted in the receptacles 104 of the scaffolding and on the other hand by means of the guide(s) 4. If a worker falls against the front railing 1, it is connected to the scaffolding by means of vertical pins 3 and guides 4, whereby the front railing 1 is firmly and securely connected to the other elements 100 of the scaffolding. With the vertical pins 3 the front railing 1 is connected at its lower end to the scaffolding 100, a further connection being provided higher up via the guides 4, in this case approximately at the end of the upper third of the front railing 1. In the embodiment shown, the mounted front railing 1 is thereby connected at four points to other elements of the scaffolding 100 and is thus securely secured. The guides 4 also protrude to the rear to the right beyond the fixing plane 222 shown below. As a result, the safety stirrup 2 is positioned outside the other scaffolding elements with the front railing 1 mounted on the scaffolding 100. The legs 41 of the two guides 4 on the right and left of the front railing 1 are arranged in reverse. On the right side, below the leg 41 with the flat functional area, the leg 41 with the hook-shaped functional area is fixed. On the opposite left side, the arrangement is exactly the opposite. This mutually inverted arrangement of the legs 41 allows a simple but safe assembly of the front railing 1. As can be seen in particular in Figure 5, the inner width between the rearward-facing ends of the legs 41 with the hook-shaped functional area is smaller than the outer distance of two adjacent vertical scaffold elements. In the orientation of the front railing shown in Figure 2, the rearward-facing ends of the legs 41 undermine the hook-shaped functional areas of the vertical scaffold elements, in particular the vertical struts 102. Therefore, the front railing 1 in the orientation shown in Figure 2 cannot be mounted or removed from the scaffolding 100 in a direction perpendicular to the fixing plane 222. For assembly or disassembly, the front railing 1 rotates about an axis perpendicular to the fixing plane 222. This increases the effective internal width between the legs 41 and the front railing 1 can be assembled or removed from the scaffolding 100. The legs 41 are here made of flat metal, in particular iron or steel, and are welded to the guard section 21. Naturally, the guides 4 can also be made of another material and can be <connected to the safety stirrup> 2<, for example, by means of screw connections.>

Figure 3 shows a front view of the front guardrail 1 of Figure 2. Figure 3 shows the front guardrail 1 of Figure 2 seen from the front left side. As a help, the areas of two vertical posts 102 of the scaffold 100, which come into operative connection with the guides 4, are shown in dashed lines in Figure 3. At the lower end of the fastening section 22 the two vertical pins 3 can be seen, which in this view are oriented inwards from the fastening elements 221. A guide 4 with two legs 41 respectively is arranged on the right and left of the guard section 21. On the right side, the lower, longer leg 41 is provided with a hook-shaped functional area. The leg 41 arranged above it has a flat functional area. On the left side, the arrangement of the two legs 41 is exactly the opposite. In the case shown, the front railing 1 is connected to the two areas of the vertical posts 102 shown. As can also be seen in Figure 5, in the case shown, the two legs 41 with the hook-shaped functional areas undermine the two vertical posts 102. The front railing 1 is therefore positively connected to the vertical posts 102 in a direction outside the plane of the drawing and cannot be dismantled in this direction without additional movements. If the front railing 1 is then to be dismantled from the scaffold, it is turned counter-clockwise according to the symbolic arrow 111. Due to the inverted and separated arrangement of the legs 41, after such a rotational movement, the legs 41 with the hook-shaped functional area are no longer engaged with the upright posts 102 and, after a rotational or locking movement according to arrow 111 in a direction outside the plane of the drawing, the front railing 1 can be removed from the upright posts 102. This design of the guides 4 ensures, on the one hand, that the front railing 1 is securely fastened to the scaffolding 100 in the assembled state and, on the other hand, that the front railing 1 can be mounted and dismounted on the scaffolding 100 by a simple turn. It is especially advantageous that the entire front railing 1 is rigidly constructed and has no moving parts. This makes the front railing 1 robust and inexpensive to manufacture.

Figure 4 shows a side view of the front railing of Figure 2. No element of the scaffold 100 is shown in Figure 2. Viewed from the side, the fixing plane 222 appears as a line and is symbolized by a dashed line below the front railing 1. It can be clearly seen that the right-facing surface of the fixing elements 221 defines the fixing plane 222. In the embodiment shown, the entire safety stirrup 2 is flat, so that the right-facing surface of the protection section 21 also lies in the fixing plane 22. The guide elements 4, the vertical pins 3, the fixing zones 31 and the horizontal pins 5 protrude to the right beyond the fixing plane 222.

Figure 5 shows a top view of the front railing 1 from Figure 2. In this view, the vertical posts 102, which have already been described in Figure 3, are also shown in dashed lines for better understanding. These two vertical posts 102 have an outer distance 502 from each other. The two legs 41 with the hook-shaped functional area have an inner width 501 on their upwardly facing side. It is easy to see that the outer distance 502 is greater here than the inner width 501. As a result, the legs 41 with the hook-shaped functional area of the front railing 1 undercut the two vertical posts 102. This means that a movement of the front railing 1 in the direction of the arrow 504 is not possible; there is a positive connection. For this reason, the arrow 504 is symbolically crossed out here. The two upwardly facing leg ends with the flat functional area define a leg distance 503. This leg distance 503 is smaller than the inner distance between the two vertical posts 102. Each of the vertical posts 102 is located between a leg 41 with a hook-shaped functional area and a leg with a flat functional area. In the case shown, the guides 4 establish a positive connection with the vertical posts 102 of the scaffold 100. In order to be able to assemble or disassemble the front railing 1 in the direction of the arrow 504, a rotation or turning movement must first be carried out according to the arrow 111 shown in Figure 3. After this rotation or turning movement has been carried out, there is no longer any positive connection between the guides 4 and the vertical posts 102 and the front railing 1 can be moved in the direction of the arrow 504.

<Figure>6< shows a detailed perspective view of a scaffold 100 with a front guardrail 1. In Figure>6< only a part of the scaffold 100 can be seen. Several vertical posts 102 run vertically. A horizontal bar 103> runs horizontally at the front. Two horizontal struts 109 run to the rear on the right, of which only the front one is visible. A rung 112 is inserted between the horizontal bar 103 and the horizontal struts 109, which here consists of two parts. The two vertical posts 102 arranged below the horizontal bar 103, the horizontal bar 103 shown, the two horizontal struts 109 and the two-piece rung 112 belong to the first floor of the scaffold 100, which is built on the ground or underground. The two vertical posts 102 fixed above the horizontal bar 103 belong to the second floor of the scaffold 100. Scaffolding receptacles 104 are arranged on the vertical posts 102, which are configured in the form of a rosette here. These scaffolding receptacles serve to connect adjacent scaffold elements. The scaffolding receptacles 104 are fixed to the upper end of the base frame 106 arranged on the front side 101. In this case, the horizontal bar 3 and the horizontal struts 109 are suspended in the scaffolding receptacles 104. In the case shown, the scaffolding receptacles 104 are fixed to the vertical posts 102. However, it is also possible to design the scaffolding receptacles 104 as independent components, which are plugged or screwed, for example, to the vertical posts 102. In the illustrated case, two vertical posts 102 of the second floor run upward above the first floor shown above the step 112. However, when setting up the scaffolding 100 it can also happen that initially there is only one vertical post 102 above the upper floor, which belongs to the second floor. A front railing 1 is attached to the front of the second floor. This is inserted with its vertical pins 3 into the recesses 1041 of the scaffolding receptacles 104. Higher up, the two guides 4 form a positive connection with the vertical posts 102, as described above, for example in Figure 5. The front railing 1 is thus connected to the other elements of the scaffolding 100 at two points in the vertical direction. By means of this double connection, on the one hand via the vertical pins 3 in the recesses 1041 and, on the other hand, via the guides 4, which enclose the vertical posts 102 extending upwards, the front railing 1 is securely fastened to the front side of the scaffolding 100 and thus effectively prevents falls. In order to be able to <remove the front railing> 1 from the scaffolding> 100<, based on the case shown, the front railing> 1 is first lifted vertically upwards according to arrow A until the vertical pins 3 emerge from the recesses 1041. The guides 4 can be moved along the vertical posts 102 during this vertical movement. As soon as the vertical pins 3 are no longer in the recesses 1041, the front railing 1 can be rotated or pivoted according to arrow B. Arrow B is shown in a plane parallel to the outer surface 105. This results in a rotation or twist of the front railing 1 around a spatial axis perpendicular to the outer surface 105. The spatial axis is an imaginary axis for precisely describing the rotation or rotation. Due to the rotation, the positive connection between the guides 4 and the vertical posts 102 is cancelled and the front railing can be dismantled in the direction of the front side. The front railing 1 is installed exactly the other way around. First, one or both guides 4<(depending on the assembly state of the scaffold>100<) are pushed onto the vertical post(s)>102<in a pivoted position. The front railing 1 is then rotated back to the orientation shown in Figure 6 about the previously defined spatial axis and the vertical pins 3 are inserted into the recesses 1041 in a vertical downward movement. After inserting the vertical pins 3 into the recesses 1041, it is no longer possible to rotate according to arrow B. Thus, the positive connection between the guides 4 and the vertical posts 102 cannot be cancelled without a prior vertical movement. This means that the front railing 1 cannot accidentally separate from the rest of the scaffolding 100. The described assembly of the front railing 1 is also easily possible from a floor below. To do this, the worker simply grabs the fastening elements 221 and assembles the front railing 1 from below on the next higher floor. It is particularly advantageous that the front railing 1 has a low weight and is therefore easy to lift.

Figure 7 shows a detailed perspective view of a scaffold 100 with a standard guardrail 110. In Figure 7, no front guardrail 1 is installed. A standard guardrail 110 is installed between two vertical posts 102. Such a standard guardrail 110 is used to permanently secure the front side of the scaffold 100. The standard guardrail 110 has the disadvantage that it is very difficult to install on the front side from the floor below.

<Figure> 8 <shows a detailed perspective view of a scaffold 100 with a standard guardrail 110 and with a front guardrail 1. In Figure> 8 <, both a standard guardrail 110 and a front guardrail 1 are installed> parallel to each other on the second floor of the scaffold 100. A particular advantage of the front guardrail 1 becomes clear here: the front guardrail 1 has its safety stirrup 2 arranged outside the outer surface 105 of the scaffold 100 defined by the vertical posts 102. The space between the vertical posts 102 is therefore free even though <the front guardrail> 1 <is installed, so that a standard guardrail> 110 <can be used in parallel at> this point. When constructing the scaffold 100, a front guardrail 1 is first assembled from the floor below as described. The upper floor is then built and a standard 110 railing is also fixed parallel to the front railing 1. The front side is then secured with the standard 110 railing and the front railing 1 can be dismantled as described and used to build the next upper floor.

Claims (16)

1. Front railing (1) for securing a front side of a walkable scaffold, in particular during the construction of this walkable scaffold, comprising <- a safety stirrup (>2<) having a protection section (>21<) intended to prevent a person from falling or falling from a trafficable scaffold and which, in addition, has a fixing section (>22<) intended to connect the front railing (>1<) to the scaffold and which is arranged below the protection section (>21<) and is connected to it, the fixing section (>22<) having at least two fixing elements (>221<) which are spaced apart from each other and extend substantially vertically, the fixing elements (>221<) defining,>with at least a part of their surfaces facing the scaffold in the mounted state on the scaffold,<a fixing plane (>222<) oriented substantially vertically in the mounted state on the scaffold,>- at least two vertical pins (3) intended to be inserted into a corresponding housing (104) of the scaffold<and which are arranged separately from a clamping element (>221<) and are fixed to a corresponding clamping element (221) via a fixing zone (31), - the vertical pins (3) being arranged on the side of the fixing elements (221) opposite the <section (>22<) of protection at half the length of the fixing elements (>221<) opposite the section (>22<) of protection and> the vertical pins (3) being arranged outside the fixing plane (222) in the direction towards the fixing plane <(>222<) facing the scaffold in the assembled state on the scaffold, whereby the protection section (>21<) is arranged outside vertically extending scaffold elements when the vertical pins (3) are inside the scaffold housings (104), the front railing (1) comprising at least one guide (4) which is provided for securing the front railing <(>1<) at least in one spatial direction to prevent tilting with respect to vertically extending elements of the scaffold, the guide (4) being fixed to the protection section (21) and having at least two legs (41) spaced apart from each other in a horizontal direction, the guide (4) protruding from the protection section (21) <in an outward direction from the fixing plane (>222<) facing the scaffold in the mounted state on the scaffold, at least two guides (4) being provided which are arranged horizontally <spaced apart from each other in the protection section (>21<) in the mounted state on the scaffold,> the two legs (41) having a hook-shaped functional area on their side opposite the protection area (22) an internal width (501) between them into which vertically extending scaffolding elements can be introduced, this internal width (501) being smaller than the external distance (502) of two adjacent vertically extending scaffolding elements. 2. Front railing (1) according to claim 1, characterized in that a first leg (41) has a hook-shaped functional area and a second leg (41) has a flat functional area, the functional areas being provided to interact with scaffold elements. 3. Front railing (1) according to claim 1 or 2, characterized in that in the mounted state on the scaffold, a leg (41) with a flat functional area of a first guide (4) is arranged above a leg (41) having a hook-shaped functional area and on a second guide (4) horizontally spaced from the first guide (4), a leg (41) having a flat functional area is arranged below a leg (41) having a hook-shaped functional area. 4. Front railing (1) according to any of the preceding claims, characterized in that the entire front railing <(>1<) is rigid and, in particular, has no moving parts.> 5. Front railing (1) according to any of the preceding claims, characterized in that the vertical pins (3) are arranged in a plane that extends separately and parallel to the fixing plane (>222<).> 6. Front railing (1) according to any of the preceding claims, characterized in that at the end of the fixing elements (221) opposite the protection section (21) there is arranged a horizontal pin (5) facing the corresponding adjacent vertical pin (3), in particular towards the second end thereof, there being a gap between the end of the horizontal pin (5) remote from the fixing element (221) and the vertical pin (3). 7. Front railing (1) according to any of the preceding claims, characterized in that the protection section (21) has a substantially U-shaped area and in this area there is arranged at least one fastening element <(>211<) which extends horizontally in the state mounted on the scaffold.> 8<. Scaffolding (100), comprising> <- at least one front side (>101<), this front side (>101<) having a base frame (106) with two vertical posts>(102) spaced horizontally from each other and two horizontal bars (103) spaced vertically from each other, the horizontal bars (103) connecting the vertical posts (102) to each other, the horizontal bars (103) and the vertical posts (102) together defining an outer surface (105) and at least two scaffolding housings (104) arranged on the front side (101), <- at least one front railing (>1<) according to any of the preceding claims,> each vertical pin (3) being inserted into each housing (104) of the scaffold, and the fixing plane (222) coinciding with the exterior surface (105) or being separated from the exterior surface (105) in a direction away from the rest of the scaffold. < 9. Scaffolding according to claim 8, characterized in that the vertical pins (3) are inserted into the recesses (1041) of the housings (104) of the scaffolding. < 10. Scaffolding according to any of the preceding claims >8< to 9, characterized in that at least one further vertical post>(102) is arranged above the base frame (106) and the guide (4) surrounds this vertical post (102) in a direction parallel to the horizontal bars (103), whereby the front railing (1) is secured against tilting in this direction. < 11. Scaffolding according to any of the preceding claims >8< to 10, characterized in that at least two vertical posts (>102<) are arranged above the base frame (106) and the front railing (>1<) at least partially covers the space between these vertical posts (>102<).> < 12. Scaffolding according to the preceding claims>8< to 11, characterized in that there is a standard railing (110) connected in parallel with the front railing (>1<) and arranged between two vertical posts (>102<).> 13. Method for securing the front side of a scaffold (100) to prevent people from falling during the <construction of the scaffold (>100<), comprising the steps of:> <- constructing a first floor of the scaffold (>100<) on the ground, the first floor having at least two base frames>(106) with two vertical posts (102) spaced horizontally from each other and two horizontal bars (103) spaced vertically from each other, the horizontal bars (103) connecting the vertical posts (102) to each other and a scaffold housing (104) being arranged adjacent to at least one horizontal bar (103) at<each vertical post (>102<) and at least two base frames (106) being oriented vertically, the scaffold housings (104) being located at the top of the base frame (106) and the corners of one base frame (106) being connected to the corners of the other base frame (106) by horizontal struts (109), at least one base frame (106) being arranged on one side (>101<) front of the scaffold (>100<) and>defining the horizontal bars (103) and the vertical posts (102) of this base frame (106) as a whole an exterior surface (105), <- place at least one rung (>112<) above the first floor of the scaffold (>100<), the rung (>112<) being connected to the upper horizontal bars (103) and/or the upper horizontal struts (109), <- connecting at least one additional vertical post (>102<) to the upper end of the base frame (106) of the first floor arranged on the front side (>101<), the vertical post (>102<) extending vertically above the first floor and belonging to the second floor of the scaffold (>100<), the additional vertical post (>102<) being connected only if none of the vertical posts (>102<) of the first floor protrudes into the second floor of the scaffold (>100<),> - installing a front railing (1) according to any one of claims 1 to 7, the front railing <(>1<) being installed by a person exclusively from the first floor of the scaffold (>100<) and initially being lifted upwards out of the outer surface (105) to the height of the second floor, the front railing (1) then being rotated about a spatial axis arranged perpendicularly to the outer surface (105) and a guide (4) being guided in this rotated state by at least one additional vertical post (102) on the second floor, <the front railing (>1<) then being rotated backwards about the same spatial axis until the clamping elements (211) are oriented vertically and a positive fit between the guide (4) and the additional vertical post <(>102<) is produced by this backward rotating movement and then the vertical pins (3) being inserted into the housings (104) of the scaffold, the railing (>1<) being moved (1) front vertically downwards until the fixing areas (31) rest on the housings (104) of the scaffold, whereby the safety stirrup (>2<) of the front railing (>1<) is fixed outside the outer surface>(105) of the scaffold (100). 14. The method according to the preceding claim 13, further comprising the step of: <install a second vertical post (>102<) on the second floor of the scaffold (>100<) adjacent to the additional vertical post (>102<) already present, this second vertical post (>102<) being fixed parallel to the additional vertical post (>102<) on the front side (>101<) of the scaffold, the second vertical post (>102<) being guided in a vertical movement>by means of a second guide (4) by a person standing on the step (112) and protected against <falls by means of the front railing (>1<) already installed, and being connected to the vertical post (106) of the first floor>below it. 15. The method according to the preceding claim 14, further comprising the steps of: <- install a standard (>110<) guardrail between the vertical (>102<) posts on the front (>101<) side of the second story of the scaffold (>100<), the standard (>110<) guardrail being provided to permanently secure the front (>101<) side against falls and the standard (>110<) guardrail being arranged and fixed in parallel with the front (1) guardrail, <- and removing the front rail (>1<) by initially lifting it upwards vertically by a person standing on the second floor step (112) until the vertical pins (3) are no longer located in the scaffold housings (104) and then rotating the front rail (1) around a spatial axis perpendicular to the outer surface (105) until there is no longer a positive fit between the guides (4) and the vertical posts (102) of the second floor and the front rail (1) finally moves away from the outer surface (105) and thus separates from the rest of the scaffold (100). 16. Method according to the preceding claim 15, wherein, starting from the second story of the scaffold (100), the steps claimed in the preceding claims are repeated starting from the first story to install the front guardrail (1), <install the vertical posts (>102<), install the standard guardrail (>110<) and remove the front guardrail (>1<) on all subsequent upper stories of the scaffold (>100<) in the vertical direction.>