EP3748107B1 - Mounting adapter, safety rail, kit for a scaffold, scaffold and method therefor - Google Patents

Description

The invention relates to an assembly adapter for temporarily fastening a safety railing ahead of it on scaffolding when erecting and/or dismantling the scaffolding, the assembly adapter being designed on the one hand for temporarily attaching to a vertical beam of the scaffolding and on the other hand for temporarily fastening the safety railing on the assembly adapter, and at least one receiving unit for receiving fastening elements of a safety railing and at least one fastening device for attaching the assembly adapter to the scaffolding is designed.

The invention also relates to a safety railing for temporary attachment to scaffolding during erection and/or dismantling of the scaffolding, with the safety railing securing a next scaffolding floor until it is completed or a top scaffolding floor until it is completely dismantled.

In addition, the invention relates to a kit for erecting scaffolding and scaffolding.

Finally, the invention also relates to methods for erecting and dismantling scaffolding.

So-called anticipatory safety railings for fall protection of the top scaffolding floor of scaffolding are known from the prior art. The safety railings are always assembled from the last completed, i.e. above all secured, scaffolding level to secure the next scaffolding level, i.e. from bottom to top during assembly. As soon as this next upper scaffolding level has been completed and secured, the safety railing can be moved to temporarily secure the next higher scaffolding level until it is completed. In an analogous application, the safety railings can also be used when dismantling scaffolding.

The well-known safety railings are attached directly and centrally to the horizontal rails of the top floor, for example hung. It is exemplified on the pamphlets EP 2 501 880 B1 , EP 2 730 718 B1 , EP 2 527 563 B1 and EP 2 180 117 B1 referred.

Furthermore, it is from the pamphlets DE 10 2005 012 904 A1 and DE 103 05 158 A1 It is known that the safety railings are fastened to the vertical bars of the scaffolding with laterally attached struts or pins.

A disadvantage of the known safety railings is that handling them is complicated and that the previously known safety railings are only compatible with scaffolding from a specific manufacturer brand.

Furthermore, the previously known temporary safety railings do not meet the TRBS 2121 Part 1 safety standard that has been in force since February 2019. This standard states, among other things, that two horizontal rails must be constructed on the temporary safety railing as fall protection.

Incidentally, the pamphlets will still be referred to EP 0 728 884 A1 , WO 2013/030805 A1 and TW M 425 905 U referred to as general prior art. FR2748290A1 discloses a safety rail with a mounting adapter.

It is therefore the object of the invention to provide a safety railing in advance and an alternative way of fastening the safety railing to a scaffolding which solves the problems mentioned above. Furthermore, it is the object of the invention to provide a corresponding scaffolding and method for this.

These objects are solved by the features of the independent patent claims. Advantageous developments of the invention are the subject matter of subordinate claims.

The inventor has recognized that a safety railing that can be used flexibly can be provided by means of a mounting adapter, which can be attached to the scaffolding on the one hand and to which the safety railing can be attached on the other hand. The mounting adapter can be designed in such a way that the safety railing can be used with scaffolding from various manufacturers. Furthermore, the erection and dismantling of scaffolding is possible with the help of such mounting adapters, to which the safety railing is temporarily attached, without great additional effort.

In addition, two upper vertical rails can be formed in the safety railing that can be used with the assembly adapter, so that the aforementioned safety standard is met.

Accordingly, the inventor proposes a mounting adapter for the temporary fastening of a safety railing ahead of it on a scaffolding when erecting and/or dismantling the scaffolding. The assembly adapter according to the invention is designed on the one hand for temporarily attaching to a vertical beam of the scaffolding and on the other hand for temporarily attaching the safety railing to the assembly adapter. Furthermore, at least one receiving unit for receiving fastening elements of a safety railing and at least one fastening device for attaching the assembly adapter to the scaffolding is designed for this purpose.

The at least one receiving unit and above all the at least one fastening device can advantageously be configured very variably, so that the mounting adapter can be used on scaffolding from various manufacturers. In a simple but preferred embodiment, the receiving unit is designed as a square tube. The square tube is advantageously made of a material that is as stable as possible, such as metal, preferably steel. Furthermore, the square tube is preferably manufactured in one piece in order to prevent possible material weaknesses or predetermined breaking points. In addition, the receiving unit designed as a square tube advantageously has a longitudinal extension along a longitudinal axis that is significantly larger than its diameter.

According to the invention, the at least one receiving unit has at least two grooves, which are arranged one above the other or one below the other when viewed in the mounted state of the mounting adapter. The grooves are advantageously of the same design, in particular of the same length and width.

Viewed in the mounted state, the two grooves are preferably arranged one above the other or below one another. This means that the longitudinal extensions or the longitudinal axes of the grooves preferably run in one line. The grooves are advantageously elongate or slit-shaped. The fastening elements of the safety railing are advantageously received in the grooves of the at least one receiving unit. The slit-shaped grooves serve as a kind of guide for the fasteners when hanging.

A further preferred embodiment therefore provides that the at least two grooves, viewed in the mounted state of the mounting adapter, each have an opening at their upper ends for inserting the fastening elements of the safety railing. When attaching the safety rail to the mounting adapters the fasteners are preferably simply inserted into the grooves from above. Accordingly, the lower, closed ends of the grooves form a stop for the fastening elements. In one variant, the openings of the grooves are arranged on the building side, ie at the rear, when viewed in the assembled state of the assembly adapter. In another variant, the openings are arranged on the outside when the mounting adapter is in the mounted state, that is to say in the front or oriented away from the building. Another variant provides for a lateral arrangement of the grooves on the receiving unit.

It is pointed out that any relative location terms used always refer to the mounted state of the mounting adapter or, more extensively, to the fastened state of the safety railing on the scaffolding.

In one embodiment of the mounting adapter, exactly one receiving unit is designed to receive fastening elements of a safety railing.

In another embodiment of the mounting adapter, two receiving units are designed to receive fastening elements from two safety rails.

Recesses, for example, can be formed in the receiving units to save weight.

Each receiving unit can have two or more grooves. At least two grooves are arranged on one side of a receiving unit. According to a preferred embodiment, each receiving unit has at least one mounting plane in which the grooves extend, the at least one mounting plane being offset laterally and arranged parallel to a fastening axis of the mounting adapter. In a preferred embodiment, the fastening axis of the mounting adapter corresponds to the vertical beam of the scaffolding to which the mounting adapter is fastened in the mounted state. Accordingly, the fastening axis advantageously runs outside of the receiving unit(s).

A variant provides that a recording unit has exactly one mounting level. Another variant provides that a recording unit has two or three mounting levels.

Advantageously, the assembly plane(s) runs/run parallel to an outside of the receiving unit. According to a particularly advantageous embodiment, the mounting plane corresponds to an outside of the receiving unit.

In one embodiment, two adjacent receiving units each have a mounting plane, with the mounting planes being aligned parallel to one another. In principle, adjacent receiving units correspond either to the two receiving units of a mounting adapter or to the two receiving units of two mounting adapters, between or on which a safety railing is attached.

In a further embodiment, two adjacent receiving units each have a mounting plane, with these two mounting planes being at an angle to one another. A mounting adapter with two mounting levels at an angle to one another is advantageously suitable for attaching a safety railing to scaffolding at a corner of a building. The corner of the building can be either an inside corner or an outside corner of the building. In this embodiment, the mounting planes are preferably at an angle of 90° to one another. However, a design with an angle other than 90° is also within the scope of the invention in order to attach safety rails to scaffolding for buildings with non-rectangular inside and/or outside corners.

A special embodiment provides that a receiving unit has two assembly planes which are at an angle, preferably at a 90° angle, to one another.

According to the invention, each receiving unit has at least two grooves, the grooves being arranged in a mounting plane.

According to one embodiment, the at least one receiving unit has two grooves in a mounting plane.

According to a further embodiment, the at least one receiving unit has at least one additional groove in a mounting level. For example, three or four etc. grooves, but preferably three grooves, are formed in one assembly level. Correspondingly, an embodiment is also possible in which a receiving unit has two mounting planes with a different number of grooves, for example two grooves in one mounting plane and three grooves in the other mounting plane.

Another regulation for safety rails states that the safety rail attachment must have a minimum stroke that the safety rail must be able to move upwards without the safety rail attachment loosening. Accordingly, one embodiment provides that the grooves are designed in such a way that a lifting height of the safety railing of at least 15 cm is necessary to detach the fastening elements of the safety railing from the grooves. In other words, the grooves—in the installed state, that is to say with the opening at the top—preferably have a depth or length of at least 15 cm. This value of the minimum depth of the grooves corresponds to the sum of the maximum lifting height of a fastener in the groove and the diameter of the fastener.

Both the mounting adapters are attached to the scaffolding and the safety railings are attached to the mounting adapters manually. In order to facilitate the hanging of the safety railing into the mounting adapter, ie the insertion of the fastening elements into the grooves, an insertion rail is advantageously formed in each case on a lower region of the opening of the grooves. In a simple embodiment, the insertion rail is designed as a type of lip. The lip can, for example, be welded to a metal receiving unit simply at the opening of the groove.

The mounting adapter according to the invention has at least one fastening device for attaching the mounting adapter to the scaffolding, preferably to a vertical beam of the scaffolding. In order to ensure secure attachment, the mounting adapter has more than one attachment device, advantageously two attachment devices.

One embodiment provides that a first fastening device is designed as a manually detachable screw clamp connection. Such a connection can advantageously be operated without tools and with one hand.

A further embodiment provides a further fastening device which is designed as a safety unit which forms a stop on the scaffolding to prevent it from falling down. The safety unit is advantageously designed as a type of hook. This hook can be hung, for example, in a gusset plate under a scaffolding floor or in a horizontal beam of the scaffolding. The securing unit also advantageously allows the mounting adapter to be attached to the vertical beam at a defined height. Likewise, the mounting adapter using the Safety unit are initially simply hung on the scaffolding to prevent falling, and then be fixed by means of the first fastening device on the vertical beam.

Yet another embodiment provides at least one additional fastening device, which forms a stop on the scaffolding to prevent lateral slipping. The stop is preferably formed at least on a vertical bar to which the mounting adapter is attached. As a result, lateral slippage can advantageously be prevented during assembly of the assembly adapter. In one variant, a V-shaped, upwardly open groove is formed in the upper area of the assembly adapter, in which advantageously part of the scaffolding, in particular a horizontal beam or a gusset plate, can be positioned during assembly.

The groove can be formed, for example, on a type of handle or curved stop, which grips around the vertical bar to which the mounting adapter is attached. In another, additional or alternative variant, a type of double cheek with a central depression is formed in a lower region of the mounting adapter, with the vertical bar, to which the mounting adapter is fastened, advantageously being positioned in the depression. Both variants in combination, ie the handle with the groove and the double cheek, preferably enable optimal positioning and securing of the mounting adapter.

The invention also relates to a safety railing for temporary attachment to scaffolding when erecting and/or dismantling the scaffolding, with the safety railing securing the next scaffolding floor until its completion or the top scaffolding floor until it is completely dismantled, the safety railing is designed in such a way that it can be temporarily fastened to the scaffolding by means of at least one assembly adapter according to the invention and described above.

The safety railing according to the invention has at least one horizontal rail and two laterally arranged vertical rails, between which the at least one horizontal rail extends, with fastening elements arranged laterally being formed on the vertical rails, which can be used temporarily in the receiving units of the assembly adapters when erecting and dismantling the scaffolding . Advantageously, the safety railing is attached to a mounting adapter on both sides. The safety rail fasteners are used for this purpose in the receiving units, more precisely in the grooves of the receiving units.

A preferred embodiment therefore provides that the fastening elements are designed to be essentially complementary to the receiving units, in particular to the grooves on the receiving units.

According to the invention, the fastening elements are designed in the form of pegs with a thickening at the end, the peg being designed for insertion into the groove. The diameter of the pegs is advantageously smaller than the width of the groove in order to allow the pegs to slide as smoothly as possible in the groove. Preferably, however, the diameter of the pegs is only a few millimeters smaller than the width of the groove in order to avoid unnecessary play, which would lead to instability of the safety rail, but to allow unhindered sliding in the groove. At the end, that is to say at the ends, the peg advantageously has a thickened portion in order to prevent the peg from being unintentionally pulled out or laterally released from the groove. If the pin is inserted into the groove, the thickening is advantageously inside the receiving unit. For example, the pin-shaped fastening elements with a terminal thickening are designed as mushroom head screws.

The number of fastening elements per vertical bar preferably corresponds to the number of grooves per receiving unit. In this way, each fastening element for fastening the safety railing to the mounting adapters can be inserted into a groove in order to ensure secure fastening, in particular non-tilting fastening.

As noted above, a safety requirement for safety rails is that the fixture must withstand a stroke of at least 15 cm before the safety rail will disengage from the fixture.

• D: Breite der Nut,
• d: Durchmesser des Zapfens in der Nut,
• h: Abstand vom oberen zum unteren Zapfen,
• H: Abstand vom oberen Zapfen zum oberen Vertikalholm, und
• A: Auslenkung des Geländers am höchsten Punkt bei einer Belastung mit einem Gewicht von 30 kg.

Another safety regulation states that the uppermost point of the safety railing may only move a maximum of 3.5 cm outwards, i.e. away from the building, with a lateral load of 30 kg. In order to comply with this safety regulation, a preferred embodiment therefore provides that the value A=(Dd)*H/h is a maximum of 3.5 cm, where:

• D: width of the groove,
• d: diameter of the pin in the groove,
• h: distance from the top to the bottom pin,
• H: Distance from the top pivot to the top vertical rail, and
• A: Deflection of the railing at the highest point with a load of 30 kg.

In a preferred embodiment, the fastening elements are arranged in the lower area of the vertical rails of the safety railing. The safety railing is thus fastened to the mounting adapters in the lower area and then advantageously extends essentially upwards in the direction of the top scaffolding floor to be secured.

Another safety regulation states that a safety railing must have at least two horizontal rails in the upper area, i.e. as a temporary railing as fall protection for a scaffolder. Accordingly, a preferred embodiment provides that two upper horizontal bars and one lower horizontal bar are formed. The two upper horizontal rails serve as fall protection and form the actual railing, and the lower horizontal rail essentially serves to stabilize the safety railing. For further stabilization of the safety railing and for further fall protection, cross braces can advantageously be formed at least between the two upper horizontal rails.

In order to enable easy handling of the safety railing, at least one handle for inserting the safety railing into the mounting adapter is formed on the lower horizontal bar in an advantageous embodiment. The handle is designed, for example, as a U-shaped bar, which is easy to grip.

A further embodiment of the safety railing provides that the at least one horizontal bar is designed to be telescopic. The width of the safety railing can thus advantageously be variably adjusted. Optionally, adjusting elements can be formed on the telescoping horizontal bars, which fix the bars to a specific length or width. Furthermore, the at least one telescoping horizontal beam is advantageously connected to the vertical beams via joints. This enables greater variability of the safety railing in use.

In addition, the invention relates to a kit for erecting scaffolding, at least comprising: several scaffolding decks and several vertical and horizontal beams including their connecting elements for erecting several one above the other lying scaffolding floors, at least one safety railing according to the invention as described above, and at least two assembly adapters according to the invention described above for temporarily fastening the safety railing to the scaffolding during erection and/or dismantling. The horizontal rails of the kit advantageously form the actual scaffolding railings, which remain permanently on the respective scaffolding floor.

The invention also relates to scaffolding erected from a kit according to the invention described above. At least one scaffolding level segment is provided for each scaffolding level. In other words, a complete scaffolding level is formed from at least one, advantageously a plurality of scaffolding level segments. The respective uppermost scaffolding floor or a respective uppermost scaffolding floor segment is temporarily secured by the safety railing according to the invention until completion, in particular until it is secured with the actual scaffolding railing.

The erection and dismantling of the scaffolding according to the invention with the safety railings according to the invention is possible either in tiers or in segments. The individual process steps of the method according to the invention for erection and dismantling are each described for a scaffolding floor segment and can be repeated in any order and number in order to build up and secure the scaffolding completely and with all scaffolding floor segments.

• Anbringen eines Gerüstbodens eines nächsten oberen Gerüstetagensegments auf bereits errichteten Vertikalholmen eines letzten gesicherten Gerüstetagensegments,
• Anschlagen jeweils eines Montageadapters an zwei benachbarten bereits errichteten Vertikalholmen,
• Einsetzen eines Sicherheitsgeländers in die beiden Montageadapter zum Schutz des nächsten oberen Gerüstetagensegments von dem letzten gesicherten Gerüstetagensegments aus,
• Fertigstellen des oberen Gerüstetagensegments einschließlich Einrichten eines Gerüstgeländers zwischen den Vertikalholmen, und
• Wiederholen der voranstehenden Verfahrensschritte nach Bedarf.

Finally, the invention also relates to a method for constructing a scaffolding according to the invention described above from a kit according to the invention described above, at least having the following method steps:

• Attaching a scaffolding deck of a next upper scaffolding level segment to already erected vertical beams of a last secured scaffolding level segment,
• Attaching a mounting adapter to two adjacent vertical bars that have already been erected,
• inserting a safety rail into the two mounting adapters to protect the next upper scaffolding tier segment from the last secured scaffolding tier segment,
• Completing the top scaffolding tier segment including setting up a scaffolding railing between the uprights, and
• Repeat the above process steps as needed.

According to the invention, the safety railing is attached to the scaffolding from below in such a way that it secures the top scaffolding level, ie the next scaffolding level to be completed. Once the safety railing is in place, the top scaffolding floor can be completed, most notably the actual scaffolding railing can be attached. A scaffolder is therefore never unsecured.

• Anschlagen jeweils eines Montageadapters an zwei benachbarten Vertikalholmen unterhalb des letzten gesicherten Gerüstetagensegments,
• Einsetzen des Sicherheitsgeländers von dem letzten gesicherten Gerüstetagensegment aus,
• Entfernen des Gerüstgeländers und des Gerüstbodens sowie falls vorhanden der Vertikalholme des obersten Gerüstetagensegments, und
• Wiederholen der voranstehenden Verfahrensschritte nach Bedarf.

The invention also relates to a method for dismantling a scaffolding according to the invention described above from a kit according to the invention described above, at least having the following method steps:

• Attaching a mounting adapter to two adjacent vertical bars below the last secured scaffolding tier segment,
• inserting the safety railing from the last secured scaffolding floor segment,
• Removal of the scaffolding railings and the scaffolding deck and, if present, the vertical bars of the top scaffolding tier segment, and
• Repeat the above process steps as needed.

When dismantling, according to the invention, the top scaffolding level is first dismantled with safety railing down to the scaffolding floor. The safety railing can then be lowered one scaffolding level from below, i.e. from the last complete and secured scaffolding level. The scaffolder is therefore always secured, even during dismantling.

FIG 1:

eine schematische Perspektivansicht eines Montageadapters,

FIG 2:

eine schematische Vorderansicht des Montageadapters gemäß der Figur 1,

FIG 3:

eine schematische Perspektivansicht des Montageadapters in einer anderen Ausführungsform,

FIG 4:

eine schematische Rückansicht des Montageadapters gemäß der Figur 3,

FIG 5:

eine schematische Seitenansicht des Montageadapters gemäß der Figur 3,

FIG 6:

eine schematische Draufsicht des Montageadapters gemäß der Figur 3,

FIG 7:

eine schematische Perspektivansicht einer Aufnahmeeinheit des Montageadapters gemäß der Figur 1,

FIG 8:

eine schematische Vorderansicht der Aufnahmeeinheit gemäß der Figur 7,

FIG 9:

eine schematische Seitenansicht der Aufnahmeeinheit gemäß der Figur 7,

FIG 10:

eine schematische Perspektivansicht einer Aufnahmeeinheit in einer anderen Ausführungsform,

FIG 11:

eine schematische Vorderansicht der Aufnahmeeinheit gemäß der Figur 10,

FIG 12:

eine schematische Seitenansicht der Aufnahmeeinheit gemäß der Figur 10,

FIG 13:

eine schematische Perspektivansicht des Montageadapters in einer weiteren Ausführungsform,

FIG 14:

eine weitere schematische Perspektivansicht des Montageadapters gemäß der Figur 13 mit Befestigungselementen,

FIG 15:

eine schematische Seitenansicht eines Sicherheitsgeländers,

FIG 16:

eine schematische Perspektivansicht eines Ausschnittes des Sicherheitsgeländers gemäß der Figur 15 mit dem Montageadapter gemäß der Figur 1,

FIG 17:

eine schematische Seitenansicht des Sicherheitsgeländers gemäß der Figur 16 mit zwei Montageadaptern gemäß der Figur 1,

FIG 18A-D:

verschiedene schematische Ansichten der Schritte zum Aufbau eines Baugerüstes mit Sicherheitsgeländern,

FIG 19:

eine schematische Perspektivansicht des Montageadapters in einer anderen Ausführungsform,

FIG 20:

eine schematische Rückansicht des Montageadapters gemäß der Figur 19,

FIG 21:

eine schematische Seitenansicht des Montageadapters gemäß der Figur 19,

FIG 22:

eine schematische Draufsicht des Montageadapters gemäß der Figur 19,

FIG 23:

eine schematische Perspektivansicht eines ersten Halteteils der Halterung des Montageadapters gemäß der Figur 19, und

FIG 24:

eine schematische Perspektivansicht eines zweiten Halteteils der Halterung des Montageadapters gemäß der Figur 20.

The invention is described in more detail below on the basis of the preferred exemplary embodiments with the aid of the figures, with only the features necessary for understanding the invention being shown. They show in detail:

1:

a schematic perspective view of a mounting adapter,

2:

a schematic front view of the mounting adapter according to FIG figure 1 ,

3:

a schematic perspective view of the mounting adapter in another embodiment,

4:

a schematic rear view of the mounting adapter according to FIG figure 3 ,

5:

a schematic side view of the mounting adapter according to FIG figure 3 ,

6:

a schematic plan view of the mounting adapter according to FIG figure 3 ,

7:

a schematic perspective view of a receiving unit of the mounting adapter according to FIG figure 1 ,

8:

a schematic front view of the receiving unit according to FIG figure 7 ,

9:

a schematic side view of the receiving unit according to FIG figure 7 ,

10:

a schematic perspective view of a recording unit in another embodiment,

11:

a schematic front view of the receiving unit according to FIG figure 10 ,

12:

a schematic side view of the receiving unit according to FIG figure 10 ,

13:

a schematic perspective view of the mounting adapter in a further embodiment,

14:

a further schematic perspective view of the mounting adapter according to FIG figure 13 with fasteners,

15:

a schematic side view of a safety railing,

16:

a schematic perspective view of a section of the safety railing according to FIG figure 15 with the mounting adapter according to the figure 1 ,

17:

a schematic side view of the safety railing according to FIG figure 16 with two mounting adapters according to the figure 1 ,

FIG 18A-D:

various schematic views of the steps to erect scaffolding with safety rails,

19:

a schematic perspective view of the mounting adapter in another embodiment,

20:

a schematic rear view of the mounting adapter according to FIG figure 19 ,

21:

a schematic side view of the mounting adapter according to FIG figure 19 ,

22:

a schematic plan view of the mounting adapter according to FIG figure 19 ,

23:

a schematic perspective view of a first holding part of the bracket of the mounting adapter according to FIG figure 19 , and

24:

a schematic perspective view of a second holding part of the bracket of the mounting adapter according to FIG figure 20 .

the figure 1 shows a schematic perspective view of a mounting adapter 1. The mounting adapter 1 comprises two receiving units 10 arranged opposite one another and parallel to one another. Two grooves 11 arranged one below the other are formed on the receiving units 10 in each case. The grooves 11 each extend in a lateral mounting plane M1 of the receiving units 10. At their upper ends, the grooves 11 have an opening 12 through which the fastening elements of a safety railing can be inserted into the grooves 11.

Furthermore, the mounting adapter 1 has a fastening device for attaching the mounting adapter 1 to scaffolding. In this embodiment of the mounting adapter 1, the fastening device has three fastening units.

An upper attachment unit is designed as a kind of arm or bow, which grips around a vertical beam of the scaffolding and thus forms an upper stop 21 in order to initially stabilize the mounting adapter 1 during attachment. In addition, two lugs are formed on the arcuate stop 21, which form a V-shaped groove 22 which is open towards the bottom. The lugs or the groove 22 serve as hooks for hanging the mounting adapter 1 on the scaffolding, for example in a gusset plate of the scaffolding, in order to secure the mounting adapter 1 before its final attachment.

A central fastening unit is designed as a screw clamp coupling 25 . The mounting adapter 1 is hereby attached to a vertical beam of the scaffolding. The screw clamp coupling 25 is screwed to a rectangular disk 24 between the two receiving units 10 .

A lower fastening unit is designed as a double cheek 23, in the middle of which the vertical bar is arranged in order to stabilize the mounting adapter 1.

In this embodiment, the receiving units 10 and the three fastening units are welded to one another.

the figure 2 shows a schematic front view of the mounting adapter 1 according to FIG figure 1 . The front of the mounting adapter 1 is oriented away from the scaffolding in its mounted state, ie on the outside. The openings 12 of the grooves 11 , which are arranged on the front or outside of the receiving units 10 , can be seen in this view. The mounting level M1 is arranged laterally on the receiving units 10 in each case.

the figure 3 shows a schematic perspective view of a mounting adapter 1 in another embodiment. In the following, only the differences between this embodiment and the mounting adapter 1 according to FIG figure 1 received. In the embodiment according to FIG figure 3 the two lugs or the V-shaped groove 22 on the arcuate stop 21 of the upper fastening unit are aligned upwards. For stabilization, the groove 22 can be pushed from below, for example around a gusset plate of the scaffolding. For a better overview, the screw clamp coupling is not shown. Only the rectangular disc 24 is shown between the receiving units 10, to which the screw-clamp coupling is fastened.

the figure 4 shows a schematic rear view of the mounting adapter 1 according to FIG figure 3 , the figure 5 a schematic side view and the figure 6 a schematic plan view.

the figure 7 shows a schematic perspective view of a receiving unit 10 of the mounting adapter according to FIG figure 1 . The receiving unit 10 is made from a square tube and is designed in one piece. The square tube is made of a stable material such as metal. The two grooves 11 are formed in one mounting plane M1 of the receiving unit 10 and extend above or below each other along the longitudinal axis of the square tube. When assembled, the longitudinal axis of the square tube runs parallel to the attachment axis of the assembly adapter 1 and is offset laterally.

Both grooves 11 have an opening 12 at their upper ends. In the installed state, the openings 12 point to the front or to the outside.

the figure 8 shows a schematic front view of the recording unit 10 according to FIG figure 7 and the figure 9 a schematic side view.

the figure 10 shows a schematic perspective view of a recording unit 10 in a further embodiment. The receiving unit 10 has two mounting planes M1 and M2, in each of which two grooves 11 extend. The mounting planes M1, M2 or the grooves 11 are formed on two opposite sides of the receiving unit 10. Two oppositely arranged grooves 11 each have a common opening 12 at their upper ends.

the figure 11 shows a schematic front view of the recording unit 10 according to FIG figure 10 and the figure 12 a schematic side view.

the figure 13 shows a schematic perspective view of the mounting adapter 1 in a further embodiment. Identical components are identified by the same reference symbols, so only the differences from the other embodiments will be discussed. In this embodiment, the grooves 11 and their openings 12 are designed differently. The lower groove 11 is somewhat shorter than the upper groove 11. The opening 12 of the lower groove 11 is formed on two sides of the receiving unit 10. The upper groove 11 projects to the end of the receiving unit 10 or is open at the top. Accordingly, the opening 12 of the upper groove 11 corresponds to the upper opening of the square tube or the receiving unit 10. Furthermore, on a front or outside of the receiving units 10 at the upper ends of the lower and upper grooves 11, an insertion rail is formed in the manner of a protruding lip 26. The lower lip 26 is designed as a separate part and welded to the square tubes, for example. The upper lip 26 is integrated into the upper fastening unit, that is to say the arc-shaped stop 21, or is formed in one piece with it. The lips 26 are slightly backwards and downwards, ie inclined in the direction of the opening.

the figure 14 shows a further schematic perspective view of the mounting adapter 1 according to FIG figure 13 with two fasteners 46 on each side. The fasteners 46 are designed as mushroom head screws with a terminal thickening 46b and a thinner pin 46a. As in the following figure 15 can be seen, the fasteners 46 through holes in the

Vertical bars 41 inserted through and secured at their inner ends with nuts 46c.

When inserting the fastening elements 46 into this mounting adapter 1 of this embodiment, the upper fastening elements 46 are first inserted into the openings 12 of the grooves 11 from above. The safety railing 40 is tilted backwards at the top, ie in the direction of the building. Then the safety railing 40 with the upper fastening elements 46 in the upper grooves 11 is lowered somewhat and tilted in the opposite direction so that the lower fastening elements 46 can be inserted into the lower grooves 11 . The safety rail 40 can then be lowered fully to abut the fasteners 46 at the lower ends of the grooves 11.

the figure 15 shows a schematic side view of a safety railing 40. The safety railing 40 comprises two laterally arranged vertical rails 41 and three horizontal rails which extend between the vertical rails 41. The two upper horizontal rails form the railing rails 42 and the lower horizontal rail 43 serves primarily to reinforce the safety railing 40. Furthermore, two cross braces 44 are formed between the railing rails 42 for stabilization and additional fall protection. A U-shaped handle 45 is arranged on the lower horizontal beam 43 .

According to the invention, two laterally arranged fastening elements 46 are formed on the vertical bars 41 in the lower area, which are temporarily inserted into the grooves of the receiving units of the assembly adapter during erection and dismantling of the scaffolding. In this embodiment, the fastening elements 46 are designed as mushroom head screws, which have a pin 46a and a thickening 46b at the end.

the figure 16 shows a section of the safety railing 40 according to FIG figure 15 in the area of the fastening elements 46 on a vertical beam 41 and a mounting adapter 1. The fastening elements 46 are designed to complement the grooves 11. To fasten the safety railing 40, the fastening elements 46 are inserted through the openings 12 into the grooves 11 from the front. The thickenings 46b slide down in the grooves 11 and the lower, closed ends of the grooves 11 form a stop and hold the safety railing 40.

the figure 17 shows again the safety railing 40 of figure 15 with two mounting adapters 1. In this illustration, the fastening elements are only at the height of the openings, so they have not yet been guided down into the grooves as far as they will go.

the Figures 18A-D Fig. 12 show various schematic views of the steps involved in erecting scaffolding 50 with safety rails 40. Figs Figure 18A shows a detail of a highly simplified scaffolding 50 with three scaffolding level segments I to III per scaffolding level. Each segment I to III has vertical bars 51 and a scaffolding floor 52. This scaffolding floor 52 forms a first and uppermost scaffolding floor E1, which has not yet been secured. The scaffolding deck 52 was attached here from the ground, that is to say from a last secured floor E0, so to speak. Two mounting adapters 1 are already attached to the vertical bars 41 of the left segment I.

In a next step, see Figure 18B , In each case a safety railing 40 is hung in two adjacent mounting adapters 1, that is to say in two mounting adapters 1 which are fastened to adjacent vertical bars 51. This is done from below from the last secured floor E0, i.e. the floor. The handle 45 which is attached to the lower horizontal rail 43 of the safety railing 40 serves for this purpose.

After attaching the safety rail(s) 40, the respective segment I to III or the floor E1 is secured and the scaffolder can now complete the top floor E1 protected by the safety rail 40. In particular, the actual, permanent scaffold railing 53 can now be attached, see Figure 18C . Furthermore, the scaffolding floor 52 for the next scaffolding level E2 is attached to further vertical beams 51 from below.

In the following step, see Figure 18D , further mounting adapters 1 are again attached to the vertical bars 51 of the last secured floor E1, in which the safety railings 40 are hung one floor higher from bottom to top, so that the top floor E2 is now secured again and can be completed.

the figure 19 shows a schematic perspective view of a mounting adapter 1 in yet another embodiment. This embodiment has a holder 30 between the receiving units 10, to which the receiving units 10 are fixed and the fastening device can be attached. The holder 30 is designed in two parts with a first holding part 31 and a second holding part 32, see FIG Figures 23 and 24 . The holding parts 31 and 32 each have two arm-shaped tabs 31a and 32a, respectively, and can be simply plugged together.

the figure 20 shows a schematic rear view of the mounting adapter 1 according to FIG figure 5 , the figure 21 a schematic side view and the figure 22 a schematic plan view.

the figure 23 shows a schematic perspective view of the first holding part 31 of the bracket 30 of the mounting adapter 1 according to FIG figure 5 . The holding part 31 has two tabs 31a on each of the two longitudinal sides. A hook 31b is formed at the upper end of the holding part 31, which is used for connection to the second holding part 32, see FIG figure 24 .

the figure 24 shows a schematic perspective view of the second holding part 32. The holding part 32 has two lugs 32a on both longitudinal sides, which are arranged offset to the lugs 31a of the first holding part 31 when connected to the first holding part 31. An eyelet 32b is formed at the upper end of the holding part 32, in which the hook 31b of the first holding part 31 engages in order to connect the holding parts 31 and 32.

Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of protection according to the claims of the invention. In particular, the invention is not limited to the combinations of features specified below, but other combinations and sub-combinations that are obviously executable for a person skilled in the art can also be formed from the disclosed features according to the claims. It is also within the scope of the invention to effect a mechanical reversal of the functions of the individual mechanical elements of the invention.

Reference List

1

mounting adapter

10

recording unit

11

groove

12

opening

21

arcuate stop

22

V-shaped groove

23

double cheek

24

rectangular disc

25

Screw clamp coupling

26

lip

30

bracket

31

first holding part

31a

Tab of the first holding part

31b

hook

32

second holding part

32a

Tab of the second holding part

32b

eyelet

40

safety rails

41

vertical rail

42

upper railings

43

lower horizontal bar

44

cross braces

45

handle

46

fastener

46a

cones

46b

thickening

46c

mother

50

scaffolding

51

vertical rail

52

scaffolding floor

53

scaffolding railings

D

width of a groove

i.e

diameter of a pin

H

Distance from the top pin to the top horizontal rail of the safety rail

H

Distance from the top to the bottom pin

A

Deflection of the top horizontal bar of the safety railing

M1, M2

mounting level

E0, E1, E2

scaffolding floor

I,II,III

Scaffolding (story) segment

Claims (10)

1. Mounting adapter (1) for temporarily fastening a lead safety railing (40) to a building scaffold (50) when setting up and/or dismantling the building scaffold (50), wherein

   1.1. the mounting adapter (1) is designed, on the one hand, for temporarily attaching to a vertical member (51) of the building scaffold (50) and, on the other hand, for temporarily fastening the safety railing (40) to the mounting adapter (1), and

   1.2. at least one receiving unit (10) is designed for receiving fastening elements (46) of in each case a safety railing (40) and at least one fastening device is designed for attaching the mounting adapter (1) to the building scaffold (50), characterized in that

   1.3. the at least one receiving unit (10) has at least two grooves (11) which, as viewed in the mounting state of the mounting adapter (1), are arranged above one another.
2. Mounting adapter (1) according to the preceding Patent Claim 1, characterized in that the at least two grooves (11), as viewed in the mounting state of the mounting adapter (1), have at each of their upper ends an opening (12) for introducing the fastening elements (46) of the safety railing (40) .
3. Mounting adapter (1) according to one of the preceding Patent Claims 1 to 2, characterized in that each receiving unit (10) has at least one mounting plane (M1, M2) in which the grooves (11) extend, wherein the at least one mounting plane (M1, M2) is arranged laterally offset from and parallel to a fastening axis of the mounting adapter (1).
4. Mounting adapter (1) according to one of the preceding Patent Claims 1 to 3, characterized in that the grooves (11) are designed in such a way that, in order to unhook the fastening elements (46) of the safety railing (40) from the grooves (11), a lifting height of the safety railing (40) of at least 15 centimetres is necessary.
5. Safety railing (40) for temporarily fastening to a building scaffold (50) when setting up and/or dismantling the building scaffold (50), wherein, during setting up, the safety railing (40) in each case secures a next scaffold level (E1, E2) until the completion thereof or in each case an uppermost scaffold level (E1, E2) until the complete dismantling thereof, wherein the safety railing (40) is designed in such a way that it can be temporarily fastened to the building scaffold (50) by means of at least one mounting adapter (1) according to one of the preceding Patent Claims 1 to 4, wherein the safety railing (40) at least comprises:

   5.1. at least one horizontal member (42, 43) and two laterally arranged vertical members (41) between which the at least one horizontal member (42, 43) extends, characterized in that

   5.2. laterally arranged fastening elements (46) are formed on the vertical members (41) and, when setting up and dismantling the building scaffold (50), can be temporarily inserted into the receiving units (10) of the mounting adapters (1), and

   5.3. the fastening elements (46) are pin-shaped with a terminal thickened portion (46b), wherein the pin (46a) is designed to be introduced into the groove (11) .
6. Safety railing (40) according to the preceding Patent Claim 5, characterized in that the value A = (D - d) * H/h is at most 3.5 cm, where:

   D: width of the groove,

   d: diameter of the pin in the groove,

   h: distance from the upper to the lower pin,

   H: distance from the upper pin to the upper vertical member, and

   A: deflection of the railing at the highest point under a loading with a weight of 30 kg.
7. Kit for erecting a building scaffold (50), at least comprising:

   7.1. a plurality of scaffold platforms (52) and a plurality of vertical and horizontal members (41, 42, 43) including the connecting elements thereof for erecting a plurality of scaffold levels (E1, E2) situated above one another,

   7.2. at least one safety railing (40) according to one of the preceding Patent Claims 5 to 6, and

   7.3. at least two mounting adapters (1) according to one of the preceding Patent Claims 1 to 4 for temporarily fastening the safety railing (40) to the building scaffold (50) when setting up and/or dismantling.
8. Building scaffold (50), erected from a construction kit according to the preceding Patent Claim 7.
9. Method for setting up a building scaffold (50) according to the preceding Patent Claim 8 consisting of a kit according to the preceding Patent Claim 7, at least comprising the following method steps:

   9.1. mounting a scaffold platform (52) of a next upper scaffold level segment on already erected vertical members (51) of a last secured scaffold level segment,

   9.2. attaching in each case a mounting adapter (1) according to one of the preceding Patent Claims 1 to 4 to two adjacent already erected vertical members (51),

   9.3. inserting a safety railing (40) according to one of the preceding Patent Claims 5 to 6 into the two mounting adapters (1) for protecting the next upper scaffold level segment from the last secured scaffold level segment,

   9.4. completing the upper scaffold level segment including installing a scaffold railing (53) between the vertical members (51), and

   9.5. repeating the above method steps as required.
10. Method for dismantling a building scaffold (50) according to the preceding Patent Claim 8 consisting of a kit according to the preceding Patent Claim 7, at least comprising the following method steps:

    10.1. attaching in each case a mounting adapter (1) according to one of the preceding Patent Claims 1 to 4 to two adjacent vertical members (51) below the last secured scaffold level segment,

    10.2. inserting the safety railing (40) according to one of the preceding Patent Claims 5 to 6 from the last secured scaffold level segment,

    10.3. removing the scaffold railing (53) and the scaffold platform (52) and, if present, the vertical members (51) of the uppermost scaffold level segment, and

    10.4. repeating the above method steps as required.

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