EP3643835B1 - Connecting strip for ladders for building a screening wall and screening wall element - Google Patents

Description

The present invention relates to a connecting strip for ladders for the construction of a privacy wall. In addition, the invention relates to a screen wall element which has ladders and the connecting strip.

State of the art

Nowadays, onlookers and onlookers are an increasing nuisance during rescue operations, especially in traffic accidents and fire fighting. The onlookers not only disturb the emergency services directly at the scene, but also often cause delays or traffic jams on access roads and / or nearby ones Roads, which cause considerable problems and often dangerous situations.

Mobile privacy screens are therefore already known that are set up on site and prevent the outside view of the deployment site. Typically, privacy screens with a fixed frame are used, into which a tarpaulin or other privacy screen is then stretched. Similar to a site fence, these privacy screens are often reinforced with a grid between the frame. However, such privacy screens usually have to be requested separately.

In addition, mobile privacy screens are provided that can be carried in emergency vehicles and then installed on site. As a result, the mostly already fully loaded emergency vehicles with the components that are only used to set up the mobile privacy screen are additionally burdened. It mobile privacy screens are also known, which require less space, but this is at the expense of stability.

It is therefore the object of the invention to provide a mobile privacy screen that takes up little additional space and also ensures a high level of stability.

It is typically the task of the emergency services to erect a privacy screen. Nowadays there are ladders in many emergency vehicles of the fire brigade and the technical relief organization (THW). Such ladders for the fire brigade and the THW are standardized for Germany and in some EU countries in DIN EN 1147. There are usually four ladders per vehicle.

the DE 600 465 C describes articulated connections for double ladders. Several sleeves are pivotably arranged on a rod. Stiles of two ladders can be retracted into the sleeves. Finally, the two conductors can be aligned differently to one another by pivoting the sleeves around the rod.

the U.S. 4,469,193 discloses a ladder having a base component into which stiles of a ladder can be inserted. On the one hand, the base component can serve to provide a ladder with better support on the floor. On the other hand, the base component can also be used to connect two conductors to one another.

Disclosure of the invention

A connecting strip according to claim 1 is proposed for ladders for the construction of a privacy wall. The connection strip can also be referred to as a conductor connection part or as a conductor connection stand. Ladders in accordance with DIN EN 1147 are preferably used. By using these standardized ladders, the height of the ladders makes it possible to provide a level of privacy protection that is higher than that of previously known privacy protection solutions. The ladders have two stiles, between which a plurality of rungs are arranged perpendicular to the stiles. Two or more ladders can be connected together. The connecting bar includes a strip-shaped base body, which is preferably designed as a rectangular profile or as a U-shaped profile (U-profile). The length of the strip-shaped base body is significantly greater than its width and height. In order to set up a frame for a privacy screen, the strip-shaped base body is laid lengthways on the floor. As a result, the connecting strip develops a supporting effect in the longitudinal direction of the base body, even if further components, especially in the vertical direction, are attached to the connecting strip. Two pairs of brackets are arranged on this base body for receiving the spars of the ladders. The pairs of holders are designed in such a way that they can accommodate a section of the stiles, with the dimensions of the pairs of holders being adapted in particular to the dimensions of the ladder and the stiles. When using the plug-in ladder according to DIN EN 1147, the dimensions of the conductors are known from the standard and the pairs of brackets can be adapted to these standardized dimensions.

The preferred material for the connecting strip is galvanized steel, aluminum or stainless steel. Other metals or plastics can also be provided if they ensure the necessary stability.

The following sections of the ladder refer to a vertical ladder. A bottom section is accordingly the lower section of the standing ladder, which is arranged at the end of the ladder standing on the floor. A section facing away from the bottom is the upper section of the ladder, which is arranged at the end of the ladder opposite the bottom section. The distance between the spars is reduced from the bottom end to the end facing away from the bottom.

A first pair of brackets is arranged on the base body of the connecting strip and it is designed to receive a bottom section of stiles of a first ladder. For this purpose, the dimensions and the spacing of the first pair of brackets are adapted to the dimensions and spacing of the first ladder. A second pair of brackets is also arranged on the base body and it is designed to accommodate a section on the bottom or a section facing away from the bottom of stiles of a second ladder. For this purpose, the dimensions and the distances of the second pair of brackets are the dimensions and distances of the second head adjusted. The first conductor and the second conductor are preferably the same and particularly preferably the first conductor and the second conductor correspond to DIN EN 1147 Are at an angle to each other that deviates from 0 ° and 180 °.

When the conductors are inserted into the connecting strip, the conductors and the connecting strip together form a support. Preferably, two such supports are provided in order to attach a privacy screen element on both sides. The supports are therefore easy to assemble using the ladders. The particular advantage of this invention results from the fact that the ladders are already part of the equipment of emergency vehicles of the fire brigades and the THW and are consequently already present in the emergency vehicles provided for this purpose. In order to have a stable frame available for the privacy screen in use, only the connecting strips according to the invention have to be carried along, which can be stowed away in a relatively space-saving manner due to their structure. If not already available on the vehicles, a corresponding privacy tarpaulin will be carried. In many operations, especially in traffic accidents, these ladders are not used for other purposes or at least not all of the ladders carried are used for other purposes. The invention therefore offers the advantage of providing a mobile privacy screen with existing ladders, which in the dismantled state takes up little additional space and weight and also ensures a high level of stability in the assembled state.

The second pair of brackets has two first receiving openings which serve to receive the section of the rails of the second ladder facing away from the floor, and at least one second receiving opening which, together with one of the first receiving openings, serves to receive the bottom section of the rails of the second ladder. The receiving openings are each formed in holders of the second pair of holders. The brackets of the second bracket pair with the four receiving openings are each arranged on the connecting strip, the four receiving openings being open perpendicular to the longitudinal direction of the connecting strip. As a result, the second conductor can be in each of the connecting strips, regardless of its orientation be plugged in. As described above, two connecting strips are preferably provided in order to build up the framework of the privacy wall. This configuration makes it possible to plug the same second ladder into both connecting strips, the bottom section of the stiles of the ladder being plugged into one of the two connecting strips and the section facing away from the bottom being plugged into the other connecting strip. It is also possible to plug two second conductors into the two connecting strips.

The distance between the two first receiving openings corresponds to the distance between the spars on the section facing away from the floor. The distance between the second receiving opening and the one first receiving opening corresponds to the distance between the spars on the bottom section. A second receiving opening is preferably arranged in pairs with the other first receiving opening. This arrangement is described in more detail below.

The shape and dimensions of the receiving openings are adapted to the shape and dimensions of the stiles of the second ladder on the respective section. Assign the spars z. B. a rectangular cross-section - as provided in DIN EN 1147 - the receiving openings are also rectangular, the width and the height of the receiving openings correspond to the width and depth of the spars on the respective section or are slightly larger so that the spars can be inserted and then held by the receiving openings.

The first pair of brackets advantageously has two U-shaped profiles for receiving the bottom section of the stiles of the first ladder. In general, U-shaped profiles each have a base part and two U-legs which are arranged on the base part so that the side opposite the base part is open (open side). The two U-shaped profiles are each arranged on the connecting strip and extend perpendicular to the longitudinal axis of the connecting strip. The U-shaped profiles are aligned in such a way that the open sides of the two U-shaped profiles are arranged facing away from one another. In order to secure the first ladder in the U-shaped profiles, the U-legs can have elongated holes through which snap locks that are located on the stiles of the first ladder are secured will. The distance between the two U-shaped profiles corresponds to the distance between the spars on the bottom section. The shape and dimensions of the U-shaped profiles are adapted to the shape and dimensions of the stiles of the second ladder on the bottom section. Assign the spars z. B. a rectangular cross-section - as provided in DIN EN 1147 - so the base part and the U-legs form three sides of the corresponding rectangle, the width of the base part corresponds to the depth of the spar on the bottom section and the width of the U- Legs correspond to the depth of the spar on the bottom section or are minimally larger, so that the spars can be inserted and then held by the U-shaped profiles.

The first pair of holders and the second pair of holders are preferably arranged on the base body in such a way that the angle between the longitudinal axes of the two conductors is preferably in a range between 60 ° and 120 ° and particularly preferably in a range between 85 ° and 95 °. The angle is very particularly preferably 90 °, i. H. the longitudinal axes of the two conductors are perpendicular to one another.

In particular, it is provided that the first pair of holders is arranged such that the longitudinal axis of the first conductor runs vertically. The first ladder in this case is called the vertical ladder. The above-mentioned U-profiles extend upwards in the vertical direction from the connecting strip, the open sides being directed outwards in the longitudinal direction towards the ends of the base body. Thus, after insertion, the rungs of the vertical first ladder are arranged parallel to the longitudinal axis of the base body. Furthermore, in this case it is particularly provided that the second pair of brackets is arranged such that the longitudinal axis of the second conductor runs horizontally. The second ladder in this case is called the horizontal ladder. The above-mentioned receiving openings are directed in the horizontal direction and perpendicular to the longitudinal axis of the base body. Thus, after insertion, the rungs of the horizontal second ladder are arranged parallel to the longitudinal axis of the connecting strip. When the connecting strip lies lengthwise on the floor, the horizontal second conductor also rests at least partially on the floor, as a result of which it develops a supporting effect perpendicular to the longitudinal axis of the base body. The stiles of the ladder typically do not run parallel to one another, but spread out towards the bottom end. Accordingly, the first pair of holders is preferably not arranged perpendicularly on the base body, but is angled towards one another in the longitudinal direction of the base body. In other words, each holder of the first pair of holders is preferably inclined towards the other holder at an angle to the perpendicular of the longitudinal axis of the base body, this angle corresponding to the angle between the stiles and the longitudinal axis of the ladder.

Preferably, one holder of the first pair of holders is arranged adjacent to one another in pairs with at least one holder of the second pair of holders. If the second pair of holders has two holders with receiving openings, one holder of the first pair of holders is arranged between each two holders of the second pair of holders, lying against one another. The first pair of holders and the second pair of holders are advantageously arranged on the side facing away from the bottom of the preferably lying base body. As a result, the longitudinal axes of the two conductors and the longitudinal axis of the base body intersect at one point. This has the advantage that the weight distribution is balanced and the stability is increased.

Particularly preferably, each holder of the first pair of holders is arranged between the holders of the second pair of holders. If the first pair of brackets has two U-shaped profiles and the second pair of brackets has two brackets with first receiving openings and two brackets with second receiving openings, the U-shaped profile is between the bracket with the first receiving opening and the bracket with the second receiving opening arranged. Since the distance between the stiles on the section facing away from the floor is typically smaller in the case of ladders, the two first brackets are closer to one another than the two second brackets. As a result of this arrangement, the open side of the U-shaped profile is delimited to the outside by the second mounting section. This has the advantage that the vertical first ladder is additionally secured.

The connecting bar should stand securely on the floor. Therefore, foot parts are at the ends of the base body on the bottom side (Bottom) arranged. The foot parts also have openings through which a fastening means, such as. B. a ground anchor, can be performed and can finally be anchored in the ground.

In addition, the foot parts can have telescopic or foldable components in order to increase the stability of the support or of the entire screen wall element.

The components described above are preferably attached to the base body by means of welding.

Also on the bottom side (underside) of the base body can be at least partially a non-slip covering, z. B. be provided a rubber covering. This non-slip covering is preferably provided on the foot parts described above. This increases the coefficient of friction for most substrates compared to the metals used for the connecting strip.

In addition, a privacy screen wall element is proposed which comprises at least three ladders and two of the connecting strips described above as well as a privacy screen element.

For each of the two connecting strips, a first ladder is inserted with the bottom section of the stiles into the first pair of brackets, specifically into the U-shaped profiles. The first two conductors then preferably stand vertically on the connecting strip. To build a wide screen wall element, two second ladders are plugged together by connecting the bottom-side section of one second ladder to the bottom-facing section of the other second ladder. Then one of the second conductors with the section of the stiles facing away from the bottom is inserted into the second pair of holders, preferably into the first two receiving openings, one of the two connecting strips and at the same time the other second ladder with the section of the stiles on the bottom is inserted into the second pair of holders, preferably into one of the first receiving openings and inserted into the corresponding second receiving opening, the other connecting strip. In this way, a framework for a wide screen wall element with four ladders can be realized that are typically found in this number in a fire brigade or THW emergency vehicle.

Alternatively, only a second ladder can be used to build a narrow screen wall element instead of the two ladders mentioned above, which are inserted into both connecting strips.

In order to build up an even wider screen wall element, further second ladders can be provided. In principle, these second conductors can be plugged together directly; a further connection strip is advantageously provided between the two connection strips mentioned above, into which the second conductors are inserted as described above. This further connecting strip is designed as described above, but a first conductor does not necessarily have to be inserted into the connecting strip.

The privacy screen element is then attached to this scaffolding, specifically by attaching the privacy screen element to at least the two vertical first ladders. The privacy screen element is preferably opaque and can, for. B. be a tarpaulin, a fabric, a banner, a mesh fabric or the like. The privacy screen element is optionally air-permeable. In particular, a line can be stretched between the two first conductors, preferably on the side facing away from the floor, and the privacy screen element can then be fastened over the line and, if necessary, stretched.

This provides a mobile privacy screen wall element that takes up little additional space and also ensures a high level of stability. Depending on the location and the environment, several privacy wall elements can be combined to form a privacy wall.

Brief description of the drawings

• Figur 1 zeigt eine isometrische Ansicht (a) und eine Frontansicht (b) einer ersten Ausführungsform der erfindungsgemäßen Verbindungsleiste.
• Figur 2 zeigt eine isometrische Ansicht (a) und eine Frontansicht (b) einer zweiten Ausführungsform der erfindungsgemäßen Verbindungsleiste.
• Figur 3 zeigt eine Frontansicht der zweiten Ausführungsform der erfindungsgemäßen Verbindungsleiste mit einer ersten Steckleiter, die in die Verbindungsleiste eingesteckt ist.
• Figur 4 zeigt eine isometrische Ansicht eines Gerüsts für ein Sichtschutzwandelement gemäß einer Ausführungsform der Erfindung mit zwei erfindungsgemäßen Verbindungsleisten, zwei ersten Steckleitern und zwei zweiten Steckleitern.
• Figur 5 zeigt eine isometrische Ansicht eines Sichtschutzwandelements gemäß einer Ausführungsform der Erfindung mit zwei erfindungsgemäßen Verbindungsleisten, zwei ersten Steckleitern, zwei zweiten Steckleitern und einem Sichtschutzelement, das an einer Leine befestigt ist.
• Figur 6 zeigt eine isometrische Ansicht eines Sichtschutzwandelements gemäß einer weiteren Ausführungsform der Erfindung mit zwei erfindungsgemäßen Verbindungsleisten, zwei ersten Steckleitern, zwei zweiten Steckleitern und einem Sichtschutzelement, das an den Steckleitern befestigt ist, sowie zusätzliche Sicherungselemente.

Exemplary embodiments of the invention are shown in the drawings and explained in more detail in the description below.

• Figure 1 shows an isometric view (a) and a front view (b) of a first embodiment of the connecting strip according to the invention.
• Figure 2 shows an isometric view (a) and a front view (b) of a second embodiment of the connecting strip according to the invention.
• Figure 3 shows a front view of the second embodiment of the connection strip according to the invention with a first plug-in conductor which is inserted into the connection strip.
• Figure 4 shows an isometric view of a framework for a screen wall element according to an embodiment of the invention with two connecting strips according to the invention, two first plug-in ladders and two second plug-in ladders.
• Figure 5 shows an isometric view of a privacy screen wall element according to an embodiment of the invention with two connecting strips according to the invention, two first plug-in ladders, two second plug-in ladders and a privacy screen element that is attached to a leash.
• Figure 6 shows an isometric view of a privacy screen wall element according to a further embodiment of the invention with two connecting strips according to the invention, two first plug-in ladders, two second plug-in ladders and a privacy screen element that is attached to the plug-in ladders, as well as additional securing elements.

Embodiments of the invention

The dimensions given below are exemplary values that have been optimized in connection with extension ladders in accordance with DIN EN 1147. If other ladders are provided in this context, the dimensions can be adjusted accordingly. The invention is not limited to the specified dimensions and ladders.

In Figure 1a is an isometric view and in Figure 1b is a front view of a first embodiment of the connecting strip 1 according to the invention shown. The connecting strip 1 has a strip-shaped base body 10 which, in this exemplary embodiment, is designed as a rectangular profile. In further exemplary embodiments not shown, the base body can also be a U-profile. The width of the base body 10 is 80 mm, the height of the base body 10 is 40 mm. The length of the base body 10 is many times greater than the width and the height of the base body 10 and is 1500 mm. The connecting bar 1 is at least partially z. B. made of galvanized steel, aluminum or stainless steel, but other materials such. B. plastics are used. The connecting strip 1 is preferably made from a material (unless otherwise described). In the case of metals, the components described below are preferably attached to the base body 10 by means of welding.

On the top of the base body 10 facing away from the bottom, two U-shaped profiles 11 (hereinafter referred to as U-profiles) are arranged, the longitudinal axes of which are inclined towards one another at an angle of inclination of 1.2 ° to the vertical. Each U-profile 11 has a base part 111 and two U-legs 112, which extend outward from the two side edges of the base part 111 to the end of the base body 10 which is closer. The inside dimension of the U-profiles 11, ie the distance between the two U-legs 112 on the base body 111 (not designated), is 75 mm and the height a1 of the U-profiles 11 is 195 mm. The distance d1 (see Figure 1b ) between the two U-profiles 11, measured on the insides of the two base parts 111, is 395 mm and therefore corresponds to the distance between the stiles of a ladder according to DIN EN 1147 on the bottom section, measured on the insides of the stiles. A first ladder 2 is then inserted into the U-profile 11 - this is shown in FIG Figure 3 and the associated description explained in detail. In addition, the base parts 111 of the U-profiles 11 each have an elongated hole 115 with a diameter of 22 mm at a height of 155 mm (middle of the elongated hole).

Two first receiving profiles 12 and two second receiving profiles 13 are also arranged on the upper side of the base body 10 facing away from the bottom. In each case a U-profile 11, a first receiving profile 12 and a second receiving profile 13 are arranged next to one another. The first receiving profile 12 is arranged in relation to the U-profile 11 towards the center of the base body 10 on the base part 111 of the U-profile 11. The second Receiving profile 13 is arranged in relation to the U-profile 11 outwards (in the direction of the closer end of the base body 10) at the opening of the U-profile 11 formed by the U-legs 112 and thus closes the U-profile 11 to the outside down.

The first receiving profiles 12 can be implemented as rectangular profiles or as angle profiles, each with a width a2 of 60 mm, a height of 76 mm and a wall thickness of 2.5 mm. The first receiving profiles 12 each form a first receiving opening 120. The distance d2 between the two first receiving openings 120, measured on the respective facing side, is 274 mm and therefore corresponds to the distance between the stiles of a ladder according to DIN EN 1147 on the section facing away from the floor ( plus clearance), measured on the inside of the spars. A section of spars of a second ladder 3, 3 'facing away from the floor is inserted into the two first receiving openings 120 (see FIG Figure 4 ). In Figure 2 a further exemplary embodiment is given for the realization of the first receiving openings.

The second receiving profiles 13 can be implemented as rectangular profiles with a width a3 of 40 mm and a height b3 of 76 mm or as an angle profile with a width a3 of 45 mm and a height b3 of 76 mm, the wall thickness in both cases Is 2.5 mm. Here, the second receiving profiles 13 each form a second receiving opening 130. The distance d3 between the second receiving opening 130 and the opposite first receiving opening 120 (same connecting strip 1), measured on the respective facing side, is 380 mm and therefore corresponds to the distance between the stiles of a ladder according to DIN EN 1147 on the bottom section, measured at the inside of the spars. A bottom section of spars of a second plug-in ladder 3, 3 'is inserted into one of the two second receiving openings 130 and into the opposite first receiving opening 120 (same connecting strip 1) (see FIG Figure 4 ).

In addition, the base body 10 has a foot part 14 at each of its ends, with which the connecting strip 1 is placed on the floor. The foot parts 14 each have an opening 145 through which a ground anchor can be passed. With the help of the ground anchor, the connecting strip 1 can be anchored in the ground will. In addition, a rubber covering is provided on the underside of the foot parts 14 (not shown here), which increases the slip resistance of the connecting strip 1.

In the following, the same components are provided with the same reference numerals and for their description, reference is made to the above description of FIG Figure 1 referenced.

In Figure 2a is an isometric view and in Figure 2b a front view of a second embodiment of the connecting strip 1 according to the invention is shown. The for the first embodiment in Figure 1 Distances d1, d2, d3 and dimensions a1, a2, b2, a3, b3 shown can be used for the second embodiment in Figure 2 be taken over. In contrast to the first embodiment, the first receiving opening 120 is not formed by a rectangular profile or an angle profile. A flat steel 15 is provided, which runs parallel at a height b2 of 80 mm to the base body 10 between the U-profiles 11. Two webs 16 run vertically between the flat steel 15 and the base body 10. One web 16 is arranged at a distance a2 of 80 mm from one of the U-profiles 11. The webs 15 and part of the flat steel 15 then each form one of the first receiving openings 120 on each side. Even if the term "flat steel" was used here and galvanized steel or stainless steel are two of the preferred materials, these components 15 can also be made of other materials such as B. made of aluminum or plastic. The flat steel 15 and the webs 16 are preferably made from the same material as the connecting strip 1. In the case of metals, the flat steel 15 and the webs 16 are connected to one another and to the other components by welding.

In the other figures, the second embodiment of the connecting strip 1 is used. However, the first embodiment of the connecting strip 1 can also be used in the same way.

In Figure 3 the connecting strip 1 and a first plug-in ladder 2 are shown in a front view. The first plug-in ladder 2 corresponds to DIN EN 1147 and has two stiles 21 and a plurality of rungs 22 (only one is provided with a reference number by way of example), which are positioned between the stiles 21 are arranged and are inserted into one of the two spars 21 with one end each. The first extension ladder 2 or the stiles 21 have a bottom-side section 25 and a section 26 facing away from the floor, which are defined in relation to the floor for a vertically standing extension ladder, as shown here. The bottom section 25 of the spars 21 is inserted into the U-profiles 11 so that the first plug-in ladder 2 is vertical, ie the longitudinal axis of the first plug-in ladder 2 runs parallel to the vertical and thus to the earth's gravity. More precisely, each of the spars 21 is inserted into one of the U-profiles 11, then lies with the inside against the base part 111, is enclosed on the sides by the U-legs 112 and is also on the outside by a section of the second Recording profile 13 held. The rungs 22 of the first plug-in ladder run parallel to the longitudinal direction of the base body 10. As already described, the longitudinal axes of the U-profiles 11 are inclined towards one another at an angle of inclination of 1.2 ° to the vertical. This angle of inclination corresponds to the angle between the stiles and the longitudinal axis of the first ladder. The first plug-in ladder 2 is then fastened by means of a snap lock 116 which is already mounted on the plug-in ladder 2 and is guided through the opening 115 in the base part 111.

Figure 4 shows an isometric view of a framework for a privacy screen wall element 4 (see Figure 5 or 6th ) According to an embodiment of the invention with two connecting strips 1, 1 'according to the invention, two first plug-in conductors 2, 2', which as in Figure 3 described are inserted into the connecting strips 1, 1 ', and two second plug-in conductors 3, 3', which are plugged together and are also inserted into the connecting strips 1, 1 '.

The second plug-in ladders 3, 3 'also correspond to DIN EN 1147 and have the same structure as the first plug-in ladder 2, but the first plug-in ladders 1, 1' and the second plug-in ladders 3, 3 'differ in their arrangement and function. Accordingly, the description of the components of the second ladder 3, 3 'and the definition of the bottom-side section 35, 35' and the section 36, 36 'facing away from the bottom can be made Figure 3 and the associated description for the first plug-in ladder 2 can be adopted. To distinguish between the two connecting strips 1, 1 ', the two first plug-in conductors 2, 2' and the two second plug-in conductors 3, 3 ', the reference symbols for one of the connecting strips 1' and for the one inserted therein first ladder 1 'with a stitch ('). The two connecting strips 1, 1 'are the same and a first connecting strip 1 and a second connecting strip 1' are only spoken of in the following to distinguish them.

One of the first ladder 2 is, as in Figure 3 described, inserted into the first connecting strip 1, so the bottom-side section 25 of the spars 21 is inserted into the first pair of brackets 11 so that the first ladder 2 is vertical. Likewise, the other first ladder 2 ', also as in FIG Figure 3 described, inserted into the second connecting strip 1 ', therefore the bottom-side section 25' of the bars 21 'is inserted into the first pair of brackets 11' so that the first ladder 2 'is also vertical.

The two second plug-in ladders 3, 3 'are plugged together by inserting a section 36 of one second plug-in ladder 3 facing away from the bottom into the bottom-side section 35' of the other second plug-in ladder 3 '. As a result, the two plugged-together plug-in ladders 3, 3 'can be viewed as two parts of a larger plug-in ladder. The bottom section 35 of the bars 31 of the first-mentioned second ladder 3 is inserted into the first receiving opening 120 and into the second receiving opening 130 of the first connecting strip 1 and at the same time the bottom-facing section 36 'of the bars 31' of the second mentioned second ladder 3 'is inserted into the two first receiving openings 120 'of the second connecting strip 1' inserted so that the two second connecting conductors 3, 3 'are horizontal, d. H. the longitudinal axis of the second ladder 3, 3 'run perpendicular to the vertical and thus to the earth's gravity. Accordingly, the longitudinal axes of the first plug-in ladders 2, 2 'and the longitudinal axes of the second plug-in ladders 3, 3' are essentially perpendicular to one another in each of the two connecting strips 1, 1 '.

More precisely, on the floor-rising section 35 of the second ladder 3, one of the spars 31 is inserted into one of the first receiving openings 120 of the first connecting strip 1 - in this Figure 4 of the rear first receiving opening 120 - inserted and held there within this first receiving opening 120 and the other spar 31 into the opposite second receiving opening 130 of the same first connecting strip 1 - in this Figure 4 the front second Receiving opening 130 - inserted and held there within this second receiving opening 130. On the other hand, on the section 36 'facing away from the floor, of the other second plug-in ladder 3', one of the two spars 31 'is inserted into one of the two first receiving openings 120' and held there within these first receiving openings 120 '.

The second plug-in ladders 3, 3 'consequently offer a support effect for the first plug-in ladders 2, 2', in particular towards the center of the scaffolding. Under certain circumstances, the second extension ladders 3, 3 'with their spars 31, 31' and possibly with their rungs 32, 32 'rest on the floor, so that the support effect is increased.

In further embodiments not shown here, instead of the two second plug-in conductors 3, 3 ', only a second plug-in conductor can be provided.

In still further embodiments, also not shown, a further connecting strip can be provided, which is arranged between the two connecting strips 1, 1 '. The shown second plug-in conductors 3, 3 'and / or further second plug-in conductors can then in turn be plugged into this further connecting strip. In this way, longer screen wall elements can also be implemented.

In the Figures 5 and 6th two embodiments of the screen wall element according to the invention are shown in an isometric view. A privacy screen element 4 is provided which is attached to the frame described above. For a description of the scaffolding, refer to the Figure 4 and the associated description. The same components are also identified here with the same reference symbols. The privacy screen element 4 provides the actual privacy screen and is accordingly designed to be opaque. In these exemplary embodiments, the privacy screen element 4 is a prefabricated tarpaulin; in further exemplary embodiments, the privacy screen element 4 can be a fabric, a banner, an air-permeable mesh fabric or the like.

At the in Figure 5 The embodiment shown serves primarily as a support and tensioning aid. A line 5 is provided, which is stretched between the sections 25, 25 'of the two vertical first plug-in ladders 2, 2' facing away from the floor and is fastened to the vertical first plug-in ladders 2, 2 '. At This line 5, the privacy screen element 4 is then hung on the side facing away from the floor, therefore on the upper section. Accordingly, the privacy screen element 4 is fastened on the upper section by the line 5 to the vertical first plug-in ladders 2, 2 ′ and can be stretched over the line 5. In this embodiment, the bottom side of the privacy screen element 4, that is to say the lower section, is not fastened. It is provided that the lower section and the middle section of the privacy screen element 4 are secured by emergency services. As a result, the privacy screen element 4 can yield to a gust of wind or a suction, for example from passing motor vehicles, without the privacy screen wall element falling over. As an alternative or in addition to the line 5, the fastening method of the in Figure 6 embodiment shown can be used. As already described, the connecting strips 1, 1 ′ can themselves be anchored in the ground by means of ground anchors which are guided through the openings 145 in the foot parts.

At the in Figure 6 A self-standing privacy screen is realized in the illustrated embodiment. The privacy screen element 4 is firmly connected to the first plug-in ladders 2, 2 'both on the side facing away from the floor and on the floor-side side. For this purpose, tensioning elements 52 are provided, four in this exemplary embodiment, which are attached on the one hand to the first plug-in conductors 2, 2 'and on the other hand to prefabricated openings 51, in this exemplary embodiment on the four corners of the privacy screen element 4. In combination with the tensioning elements 52, the leash 5 can be used as shown in FIG Figure 6 embodiment shown can be used. The privacy screen wall element is secured by the two second plug-in ladders 3, 3 'above all against falling over in the longitudinal direction of these second plug-in ladders 3, 3'. In addition, because of the strip-shaped base body 10 of the connecting strips 1, the privacy screen wall element is secured against falling over in the longitudinal direction of the base body 10, primarily due to its length. However, especially in the event of a strong gust of wind or a strong suction, for example from passing motor vehicles, strong forces act on the screen wall in the direction of the longitudinal direction of the base body 10. As already described, the connecting strips 1, 1 'can itself be secured by ground anchors, which pass through the openings 145 of the Foot parts are guided, anchored in the ground. Additional safety measures are to be provided. On the one hand Fire hoses 6 filled with water can be placed over the connecting strips 1, 1 ′, in particular over the base body 10. On the other hand, heavy objects 7, such as. B. foam compound canisters or other heavy objects located on the emergency vehicles can be placed on the second extension ladders 3, 3 '.

In other exemplary embodiments, not shown here, only a second plug-in ladder is used instead of the two plug-in conductors 2, 2 '. In this case, the bottom-side section of the spars of this second plug-in ladder 3 is inserted into the first receiving opening and into the second receiving opening of the first connecting strip and at the same time the section of the spars facing away from the bottom of the same second ladder is plugged into the two first receiving openings of the second connecting strip, so that the second The ladder is horizontal. As a result, a smaller privacy screen wall element can be implemented, in which case the size of the privacy screen element 4 then has to be adapted. For this, z. B. a smaller screen element 4 can be provided or the described screen element can be adapted by folding or the like. In addition, only three plug-in ladders are required and the fourth plug-in ladder can be used for other purposes.

Claims (12)

1. Connection bar (1, 1') for ladders (2, 2', 3, 3') for constructing a screening wall, comprising

   - a bar-shaped base body (10), wherein the ground-side side of the base body (10) has at least partially a slip-resistant coating,

   - a first bracket pair, which is arranged on the base body (10) and is designed to receive a ground-side section (25, 25') of stringers (21, 21') of a first ladder (2, 2'), and

   - a second bracket pair, which is arranged on the base body (10) and is formed to receive a ground-side section (35) and/or a section (36'), facing away from the ground , of stringers (31, 31') of a second ladder (3, 3'), wherein the second bracket pair has two first receiving openings (120, 120'), which serve to receive the section (36'), facing away from the ground, of the stringers (31') of the second ladder (3'), and at least one second receiving opening (130, 130'), which, together with one of the first receiving openings (120, 120'), serves to receive the ground-side section (35) of the stringers (31) of the second ladder (3),

   wherein the first bracket pair and the second bracket pair are arranged in such a way that the longitudinal axes of the two ladders (2, 2', 3, 3') are at an angle in relation to one another differing from 0° und 180°.
2. Connection bar (1, 1') according to claim 1, characterised in that the second bracket pair has:

   - two first receiving openings (120, 120') for receiving the section (36'), facing away from the floor, of the stringers (31') of the second ladder (3'), the spacing of which (d2) corresponds to the spacing of the stringers (31') on the section (36') facing away from the ground, and

   - at least one second receiving opening (130, 130') for receiving, together with one of the first receiving openings (120, 120'), the ground-side section (35) of the stringers (31) of the second ladder (3), the spacing (d3) of which corresponds to the spacing of the stringers (31) on the ground-side section (35), wherein the spacing of the stringers (31) of the second ladder (3) reduces from the ground-side end to the end facing away from the ground.
3. Connection bar (1, 1') according to one of the preceding claims, characterised in that the first bracket pair has two U-shaped profiles (11, 11') for receiving the ground-side section (25, 25') of the stringers (21, 21') of the first ladder (2, 2'), the open sides of which face away from one another and the spacing (d1) of which corresponds to the spacing of the stringers (21, 21') on the section (25, 25') facing away from the ground.
4. Connection bar (1, 1') according to one of the preceding claims, characterised in that the first bracket pair and the second bracket pair are arranged in such a way that the longitudinal axes of the ladders (2, 2', 3, 3') are substantially perpendicular to one another.
5. Connection bar (1, 1') according to claim 4, characterised in that the first bracket pair is arranged in such a way that the longitudinal axis of the first ladder (2, 2') runs vertically and
   the second bracket pair is arranged in such a way that the longitudinal axis of the second ladder (3, 3') runs horizontally.
6. Connection bar (1, 1') according to one of the preceding claims, characterised in that the brackets of the first bracket pair are angled towards each other.
7. Connection bar (1, 1') according to one of the preceding claims, characterised in that the first bracket pair and the second bracket pair are arranged on the side of the base body (10) facing away from the ground.
8. Connection bar (1, 1') according to claim 7, characterised in that each bracket of the first bracket pair are arranged between the brackets of the second bracket pair.
9. Connection bar (1, 1') according to one of the preceding claims, characterised in that foot parts (14) are arranged on the ends of the base body (10) on the ground-side side.
10. Screening element, comprising

    - at least three ladders (2, 2', 3),

    - at least two connection bars (1, 1') according to one of claims 1 to 9, and

    - at least one screening element (4),

    wherein in each case one first ladder (2, 2') is respectively inserted into the first bracket pair of the connection bars (1, 1'), and at least one second ladder (3) is respectively inserted into the second bracket pair of the connection bars (1, 1') and wherein the screening element (4) is fixed at least on the two first ladders (2, 2').
11. Screening element according to claim 10, characterised in that two second ladders (3, 3') are provided, which are interlocked,

    wherein a ground-side section (35) of one of the two second ladders (3) is inserted into the second bracket pair of one of the connection bars (1), and

    a section (36') facing away from the ground of the other second ladder (3') is inserted into the second bracket pair of the other connection bar (1'),
12. Screening element according to claim 10, characterised in that at least two second ladders are provided which are connected by at least one further connection bar.

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