EP2949833A1 - Fastening element for railings for detachable attachment to a frame element, frame element, assembly of a railing and a fixing element and method for fixing and for securing a fastening element - Google Patents

Abstract

The invention relates to a fastening element (1) for railing (20) for releasable attachment to a scaffold element. The fastening element (1) comprises a stop surface (10), a retaining pin (11) and a fastening pin (12). The fastening pin (12) has an undercut (121) in the region of the stop face (10) for engagement in an opening (31) of the frame element.

Description

The present invention relates to a fastening element for railing for releasable attachment to a scaffold element, a scaffolding element with an opening for fastening a fastener, an arrangement of a railing and a fastener and a method for fastening and securing a fastener to a scaffold element according to the preamble of independent claims.

In the construction of buildings of various kinds such as houses, factories and the like, it is necessary to stock the structures with scaffolding. The frameworks consist essentially of vertical frames between which planks or boards are located, which make it possible to make the framework. For protection and further bracing, railings are provided on the outside of the scaffolding. New construction methods often require a ready-made scaffolding before construction of the building begins. This is especially the case with prefabricated houses. Prefabricated houses consist essentially of individual elements, which are placed on a previously cast base plate. In order to work on such houses or to set them up, it is necessary that the scaffolding is already up to the top of the building before construction begins. With the conventional scaffolds, however, the safety at work is not guaranteed. As a result, additional railings were flanged to the sides of the scaffold facing the building to ensure worker safety.

Flange connections are known from the prior art, which are placed around supports of vertical frames, for example, in the manner of hose collars, in which case additional railings can then be suspended thereon. A particular disadvantage of this type of flanges is their weight, the cumbersome attachment and the lack of positioning. The flanges must be attached and set up consuming. Also, they must be calibrated with additional tools so that a railing to be fixed to it can be attached.

It is an object of the invention to provide a fastener for railing for releasable attachment to a scaffolding element, which is easy to manufacture, can be easily and quickly mounted on a scaffolding element and disassembled and ensures sufficient security to secure a railing to be fastened thereto.

This object is achieved by the devices and methods defined in the independent patent claims. Further embodiments emerge from the dependent claims.

An inventive fastening element for railing for releasable attachment to a scaffold element and in particular to a vertical frame of a scaffold element comprises at least one stop surface and a retaining pin for releasably securing a railing. Likewise, the fastening element comprises a fastening pin for fastening the fastening element to a framework element. The mounting pin has in the region of the stop surface on an undercut for engagement in an opening of the scaffold element and is preferably in this area with the Attachment surface connected. An undercut on a mounting pin is characterized in that it has a narrower cross section near its connection point than further away. Preferably, the dimension of the cross section of the undercut is selected such that the larger of the two cross sections is at least 1.1 times, preferably 1.5 times and more preferably at least 2 times larger than the narrow cross section.

The design of a fastener with a mounting pin with an undercut makes it possible to mount the fastener in a simple manner in an opening of a scaffold element and fasten, or to bring into engagement with this opening. Additional means for securing the fastener are no longer necessary. An abutment surface on the fastener also allows accurate positioning and the maintenance of distances. The assembly and disassembly are simplified, an improper or incorrect attachment is no longer possible.

Preferably, the fastening pin of the fastening element, at least in the region of the undercut in a plane transverse to an engagement direction on different outer dimensions. Preferably, a first outer dimension is at least 1.1 times, preferably 1.5 times and more preferably at least 2 times larger than a second outer dimension, in particular perpendicular to the first outer dimension.

Thus, there is a cross section of the undercut, which allows secure attachment and locking with its different dimensions.

Preferably, the fastening pin of the fastening element is designed such that the fastening pin has a T-shaped profile or at least in a cross section along an engagement direction of the fastening element has a T-shaped cross-section, or is completely formed as a T-shaped profile.

Such a configuration makes it possible to form the fastening pin symmetrically at least in relation to a plane extending along the engagement direction, so that insertion into an opening of a vertical frame in two positions is easily possible.

The fastening element preferably has a securing element, which is preferably radially spaced from the mounting and or the retaining pin. Such a securing element preferably has a stop surface.

Such a positioned abutment surface on a securing element and / or the securing element itself makes it possible that a predefined position relative to the retaining pin is given.

Preferably, such a fastening element is integrally formed and comprises at least the elements stop surface, retaining pin and fastener and preferably also the securing element. In particular, it may be provided to produce a one-piece fastening element made of light metal. The fastening element can be created for example by mechanical production such as milling or turning, a production of cast iron and in particular of light metal casting and preferably of cast aluminum is also conceivable. Light metal casting is in the present case, a metallic alloy which has at least a portion of light metals.

This enables cost-effective and process-reliable production.

Preferably, the fastening element comprises a locking element, which is displaceably mounted on the retaining pin and preferably rotatable alternatively or additionally. The locking element can be brought at least into an insertion position and into a locking position.

The locking element may be connected to the retaining pin, for example via a bolt connection or a heavy-duty pin connection.

Thus, a fastener can be made to which no additional parts are necessary when mounted on a scaffolding element and on a railing. Also, it is not necessary to carry additional tools with it to attach such fasteners to scaffolding elements.

The locking element is preferably designed such that a railing attached to the fastener is secured and it can not solve independently of the fastener. Preferably, the locking element can be brought into operative connection with an end section of a railing.

Another aspect of the invention relates to a scaffolding element, in particular a vertical frame, with one or more openings for fastening a fastening element. Preferably, the opening is designed such that a fastening element as described herein on the scaffold element is fastened. The openings each have a first outer dimension and a second outer dimension, in particular perpendicular to the upper outer dimension, and an area, wherein the area has a dimension that is greater than the second outer dimension and smaller than the first outer dimension. The first outer dimension is at least 1.1 times, preferably 1.5 times and more preferably at least 2 times larger than the second outer dimension.

The area may be located at any position of the opening along the direction of the first outside dimension. Preferably, the opening is shaped to assume, together with the area, the shape of a keyhole, that is, the area is at one end of the opening. Thus, the opening is designed such that it has an asymmetrical cross-section at least in one axis in the direction of an outer dimension. In addition, a design as described herein allows to insert and lock a fastener into the opening.

Preferably, the area of the opening is designed to have a substantially round shape. However, oval shapes or polygonal cross sections are also conceivable.

A substantially round shape makes it possible to rotate a fastener, which is located in the area with a certain tolerance.

It is conceivable that the framework element in the region of the opening has a reinforcement. Preferably, this reinforcement has an additional wall thickness in comparison to the wall thickness of the framework element, the wall thickness of Scaffolding element is substantially doubled in this area in the sequence, for example.

Another aspect of the invention relates to an arrangement of a railing and a fastener, preferably a fastener as described herein. The fastener has a retaining pin for releasably securing a railing and a radially spaced from the retaining pin securing element. The railing and preferably an end portion of a railing is in operative connection with the securing element or can be brought into operative connection therewith. Preferably, the railing can be brought into operative connection with a stop surface of the securing element.

This allows a secure attachment of the railing to the fastener. An unintentional loosening or twisting of the railing or the fastener is thus prevented.

Another aspect of the invention relates to an arrangement of a framework element, preferably as described herein and a fastener, preferably as described herein. The fastening element is designed such that an undercut is provided on a fastening pin of the fastening element, which can be brought into engagement with an opening of the frame element or is in engagement. A first outer dimension of the undercut of the fastening pin is at least 1.1 times, preferably 1.5 and more preferably at least 2 times larger than a second outer dimension of the opening.

Thus, the attachment pin can be brought with the undercut in connection with the opening in such a way that the mounting pin is no longer directly removable from the opening. The region with the first outer dimension of the pin preferably overlaps a region of the opening. This allows a secure connection of the fastening pin with the scaffolding element.

• Einführen und in Eingriff bringen eines Befestigungszapfens des Befestigungselementes in eine Öffnung des Gerüstelementes, wobei die Öffnung des Gerüstelementes eine erste Aussenabmessung, eine zweite Aussenabmessung und einen Bereich aufweist,
• Verschieben des Haltezapfens in den Bereich der Öffnung, wobei der Haltezapfen im Anschluss im Bereich der Öffnung um eine in einer Einführungsrichtung des Befestigungselementes liegende Achse gedreht wird. Vorzugsweise wird das Befestigungselement um eine Vierteldrehung gedreht.

Another aspect of the invention relates to a method of attaching a fastener to a scaffold element. Preferably, a fastener as described herein on a scaffold element as described herein and in particular attached to a vertical frame. The method is also suitable for producing an arrangement of a framework element and a fastening pin with an undercut. The method comprises the steps:

• Inserting and engaging a fastening pin of the fastening element into an opening of the framework element, wherein the opening of the framework element has a first outer dimension, a second outer dimension and an area,
• Moving the retaining pin in the region of the opening, wherein the retaining pin is subsequently rotated in the region of the opening about an axis lying in an insertion direction of the fastening element. Preferably, the fastener is rotated by a quarter turn.

Thus, it is possible to lock the mounting pin in the opening. By turning it is achieved that the retaining pin is no longer displaceable in the opening and thus secured against unintentional removal or loosening. The assembly is thus easy and fast.

• Anbringen des Befestigungselements an einem Gerüstelement;
• Anbringen des Geländers an einem Haltezapfen des Befestigungselementes,
• Das Geländer wird dabei in Wirkverbindung mit einer

Another aspect of the invention relates to a method for securing a fastener to a railing or for making an assembly of fastener and railing as described herein. The method comprises the steps:

• Attaching the fastener to a scaffold element;
• Attaching the railing to a retaining pin of the fastener,
• The railing is thereby in operative connection with a

Stop surface of the fastener brought. Preferably, the stop surface is arranged such that it has a radial distance from the retaining pin of the fastening element.

This allows a secure and firm connection of a railing with a fastener. Preferably, the method comprises the further step of securing the railing with a locking element of the fastening element. Preferably, the locking element is brought from an insertion position to a locking position. Thus, the railing is also secured against unintentional loosening.

On the basis of figures, which represent only embodiments, the invention will be explained in more detail.

Figur 1:

Eine perspektivische Darstellung eines Befestigungselementes;

Figur 2:

Eine Seitenansicht des Befestigungselementes aus Figur 1;

Figur 3:

Eine Draufsicht des Befestigungselementes aus Figur 1;

Figur 4:

Eine perspektivische Ansicht eines Gerüstelementes;

Figur 5:

Eine perspektivische Detailansicht einer Öffnung des Gerüstelementes aus Figur 4;

Figur 6:

Eine orthogonale Ansicht der Öffnung aus Figur 5;

Figur 7:

Eine perspektivische Ansicht einer Anordnung aus einem Befestigungselement und einem Gerüstelement;

Figur 8:

Eine perspektivische Ansicht einer Anordnung aus einem Gerüstelement, einem Geländer und zwei Befestigungselementen;

Figur 9:

Eine Detailansicht aus Figur 8;

Figur 10a, 10b:

Das Befestigungselement aus Figur 1 mit dem Verriegelungselement in unterschiedlichen Positionen;

Figur 11:

Eine schematische Ansicht einer Anordnung aus einem Geländer und einem Befestigungselement.

Show it:

FIG. 1:

A perspective view of a fastener;

FIG. 2:

A side view of the fastener from FIG. 1 ;

FIG. 3:

A plan view of the fastener from FIG. 1 ;

FIG. 4:

A perspective view of a scaffold element;

FIG. 5:

A detailed perspective view of an opening of the scaffold element FIG. 4 ;

FIG. 6:

An orthogonal view of the opening FIG. 5 ;

FIG. 7:

A perspective view of an assembly of a fastener and a scaffold element;

FIG. 8:

A perspective view of an arrangement of a scaffold element, a railing and two fasteners;

FIG. 9:

A detailed view FIG. 8 ;

FIGS. 10a, 10b:

The fastener off FIG. 1 with the locking element in different positions;

FIG. 11:

A schematic view of an arrangement of a railing and a fastener.

FIG. 1 shows a perspective view of a fastening element according to the invention 1. The fastening element 1 has a retaining pin 11 for holding a railing. The retaining pin 11 is on a flat

Attached element which has a stop surface 10 at its hidden area here. In line with the retaining pin 11 is a mounting pin 12, which is only partially visible here. Through the retaining pin 11 and the mounting pin 12 extends the axis, which simultaneously represents the engagement direction E for insertion of the fastener 1 in an opening of a scaffold element. Radially spaced from the retaining pin 11, a securing element 14 is arranged. In the present case, the holding pin 11 is designed as a substantially circular-cylindrical element which, in its region remote from the stop surface 10, has a slot in which a locking element 13 is arranged. The locking element 13 has an elongate opening, through which a heavy-duty pin (without reference numeral) engages in the present case, which is arranged on both sides of the locking element 13 in the retaining pin 11. As can be easily seen, the locking element 13 is arranged movably in the retaining pin 11. The locking element 13 is formed of sheet steel with a thickness of 2.5mm. The opening is wider than the diameter of the tensioning pin, so that the locking element 13 is movable. The slot of the fastening pin 12 is wider than the thickness of the locking element 13, in this case about 6mm. The fastener 13 is made of a cast aluminum.

FIG. 2 shows a side view of the fastener 1 from FIG. 1 , Like reference numerals refer to the same elements as in FIG FIG. 1 described. They are only explained again where necessary. In the area of the stop surface 10 of the mounting pin 12 is arranged. The mounting pin 12 has in the region of the stop surface 10 has a first outer dimension A1, which is 7mm. In this illustration of the fastening element 1 below the retaining pin 11 is the securing element 14 is arranged, which is likewise designed as a planar element and has a stop surface 141. In the present case, the securing element 14, the retaining pin 11 and the fastening pin 12 is formed from a single piece. However, it is also conceivable that the individual elements are formed separately, for example, and welded together. In the present case, the fastening element 1 is made of a light metal casting.

FIG. 3 shows a plan view of the fastener of the FIG. 1 , In line with the retaining pin 11, that is, on the axis E ( FIG. 1 ) in succession, a fastening pin 12 is arranged which has an undercut 121. The undercut 121 has, in the area of the stop surface 10, an extension A2 which, in comparison to the outside dimension A1 (FIG. FIG. 2 ) is about 1.6 times larger and 11mm in the present case. The region of the fastening pin 12, which is arranged farther away from the stop surface 10 in the insertion direction E, has an external dimension which in this case corresponds to approximately 2.4 times the dimension A2 and is 27 mm. As in the Figures 2 and 3 Thus, the undercut 121 of the fastening pin 12 is designed such that it has different axial external dimensions. Thus, the fixing pin 12 can be easily fixed in an opening of the skeleton member.

FIG. 4 shows a perspective view of a scaffold element and here a vertical frame 30. The vertical frame 30 has at least one and in the present case three openings 31, wherein only one of the opening 31 is designated here. The openings 31 are all located on a vertical tube of the vertical frame 30. On the second vertical tube of the vertical frame are also fasteners for Railings, however, which are welded according to the prior art with the vertical frame 30. However, it would be conceivable to design the presently mounted fasteners also as releasable fasteners 1. The vertical frame 30 would thus be made with two identical vertical tubes with openings 31.

FIG. 5 shows a perspective detail view of one of the openings 31 from the vertical frame 30 FIG. 4 , In the present case, the wall thickness, which is 2.7 mm here, through which the opening 31 protrudes, is clearly visible.

FIG. 6 shows an orthogonal view of the opening 31 from FIG. 5 , The opening 31 is located in a vertical frame 30 shown only schematically. Dotted would be a possible embodiment of an additional wall reinforcement 32, which is optional. The opening 31 has a first outer dimension V1 which is 30mm and a second outer dimension V2 which is 8mm. Also shown is a region B of the opening 31, which also has a dimension (shown here without reference numerals), which in the present case is 12 mm. The region B is arranged at a, and shown here lower end of the opening. The dimension of the area B is about 1.5 times larger than the outside dimension V2 and about 1/4 as large as the outside dimension V1. The dimension V2 is in this case slightly larger than the dimension A2 of the fastener 1 (see FIG. 2 ). Thus, the fastener 1 off FIG. 2 be introduced into the opening 31 according to the dimensions A1 and V2. The area of the undercut with its outer dimension A2 (see FIG. 3 ) is designed so that it can be rotated in the circular opening of the area B. Thus, dimension A2 is slightly smaller than the dimension of area B (not labeled here).

FIG. 7 shows an arrangement of a fastener 1 and a vertical frame 30. The fastener 1 is present as to FIG. 6 described in the opening 31 of the vertical frame 30 (FIG. FIG. 6 ). For introducing the fastening element 1 into the opening 31, the fastening element 1 was introduced into the opening 31 at 90.degree. To the twisted position shown here, so that the wall thickness (FIG. FIG. 5 ) of the opening 31 with the undercut 121 (FIG. FIG. 3 ). The fastener 1 was subsequently twisted at 90 ° to the position shown here within the opening in the area B (FIG. FIG. 6 ) and in area B ( FIG. 6 ) rotated 90 ° to the position shown here. As explained in the preceding figures, the area A2 of the undercut is greater than the area V2 of the opening 31. Thus, the fastener is secured against accidental falling out and can not in this position from the area b ( FIG. 6 ) are moved.

FIG. 8 shows an array of vertical frame 30, railing 20 and two fasteners 1. The railing 20 has end portions which are attached to the two fasteners 1. The fasteners 1 are attached to the vertical frame and as to FIG. 7 described, attached. The railing is equipped with two locking elements (see FIG. 9 ) of the fasteners 1 secured.

FIG. 9 shows a detailed view of the fastener or the arrangement FIG. 8 , Shown is an end portion of the railing 20, which is inserted with an opening over the retaining pin 11 of the fastener 1. As can be easily seen, the fastening element 1 is such designed so that a second end portion of a railing could be mounted over the retaining pin. The end portion of the railing 20 is secured with a locking element 13.

FIGS. 10a and 10b show the fastener 1 with different positions of the locking element thirteenth FIG. 10a shows an insertion position in which an end portion of the railing 20 (see FIG. 9 ) can be introduced over the retaining pin, FIG. 10b shows the locking position of the locking element 13. Starting from the position of the locking element 13 from FIG. 10a the element is rotated by 90 ° after mounting the railing around a not designated here dowel pin up and then to the position off FIG. 10b moved down. The locking element 13 is now with one of its outer edges in operative connection with the slot of the retaining pin (see FIG. 1 ).

FIG. 11 shows in a schematic view of the operation of the securing element 14 with its stop surface 141. The securing element 14 is attached to a fastener 1. Die Befestigungselemente 1 sind an dem Befestigungselement 1 befestigt. Central of the fastener 1 is a retaining pin 11, on which an end portion of a railing 20 is arranged. As can be readily appreciated, a stop surface 141 of the securing element 14 is substantially at a parallel distance from an end portion of the railing 20. As explained hereinbefore, the fixing element 1 is movable along the first outer dimension V1 (FIG. FIG. 6 ) secured. With attachment of the railing 20 on the fastener 1, it is also no longer possible that fastener 1 about its engagement direction ( FIG. 1 ), since the abutment surface 141 immediately in operative connection with a corresponding abutment surface of an end portion of the Railing 20 occurs. Thus, a secure and secure attachment of the railing on the retaining pin 11 and the fastener 1 on the vertical frame 30 is ensured.

Claims (13)

Fastening element (1) for railing (20) for releasable attachment to a framework element, in particular on a vertical frame (30), comprising a stop surface (10), a retaining pin (11) for releasably securing a railing and a fastening pin (12) for securing the Fastening element on a framework element, characterized in that the fastening pin (12) in the region of the stop surface (10) has an undercut (121) for engagement in an opening of the frame element. Fastening element (1) according to claim 1, characterized in that the fastening pin (12) at least in the region of the undercut (121) transversely to an engagement direction (E) has different outer dimensions, wherein a first outer dimension (A1) at least 1.1, preferably 1.5 and especially preferably at least 2 times larger than a second outer dimension (A2). Fastening element (1) according to claim 1 or 2, characterized in that the fastening pin (12) has a T-shaped profile. Fastening element (1) according to one of claims 1 to 3 comprising a securing element (14), which is radially spaced from the retaining pin (11) and preferably has a stop surface (141). Fastening element (1) according to one of claims 1 to 4, comprising a locking element (13) which is displaceably mounted on the retaining pin (11) and at least in an insertion position and in a locking position can be brought. Scaffolding element, in particular vertical frame (30) with one or more openings (31) for fastening a fastening element (1), preferably a fastening element (1) according to one of claims 1 to 5, wherein each opening has a first outer dimension (V1), a second outer dimension (V2) and a region (B), wherein the region (B) has a dimension which is greater than the second outer dimension (V2) and smaller than the first outer dimension (V1), wherein the first outer dimension (V1) at least 1.1 , preferably 1.5 and more preferably at least 2 times larger than a second outer dimension (V2). Scaffolding element according to claim 6, characterized in that the region (B) of the opening (31) has a substantially round shape. Scaffolding element according to claim 6 or 7, characterized in that the framework element in the region of the opening (31) has a reinforcement (32), in particular has an additional wall thickness. Assembly of a handrail (20) and a fastening element (1) preferably according to one of claims 1 to 5, characterized in that the fastening element (12) has a retaining pin (11) for detachable fastening a railing and the retaining pin (11) radially spaced Securing element (14), wherein the railing (20) with the securing element (14) is in operative connection or can be brought, preferably with a stop surface (141) of the securing element. Arrangement of a scaffolding element, preferably a scaffolding element according to one of claims 6 to 8, and a fastening element (1), preferably according to one of claims 1 to 5, characterized in that a fastening pin (12) with an undercut (121) engages with an opening (31) of the scaffold element is or is engageable, wherein a first outer dimension (A1) of the undercut (121) at least 1.1, preferably 1.5 and more preferably at least 2 times larger than a second outer dimension (V2) of the opening (31) has. Method for fastening a fastening element (1), in particular a fastening element (1) according to one of claims 1 to 5, to a framework element preferably according to one of claims 6 to 8 and preferably to a vertical frame (30), or for producing an arrangement according to claim 10 comprising the steps - Introducing and engaging a fastening pin (12) of the fastening element (1) in an opening (31) of the scaffold element, which opening has a first outer dimension (V1), a second outer dimension (V2) and an area (B) - Move the retaining pin (12) in the region (B) of the opening (31) characterized in that the retaining pin in the region (B) of the opening (31) about an axis in the insertion direction (E) axis, preferably by a quarter turn, is rotated. A method of securing a fastener (12), preferably according to any one of claims 1 to 5, with a railing (20) or for making an assembly according to claim 9, comprising the steps Attaching the fastening element (12) to a framework element, preferably according to one of claims 6 to 9, - Attachment of the railing (20) on a retaining pin (11) of the fastening element (12) characterized in that the railing (20) is brought into operative connection with a stop surface (10) of the fastening element (12). A method according to claim 12, characterized in that the railing (20) with a locking element (13) of the fastening element (12) is secured, wherein preferably the locking element (13) is brought from an insertion position to a locking position.

Images