Insertable coupling for frame elements of a scaffolding

A coupling pin clip for a coupling piece for the connection of two components that are inserted between them. To affix the insertable coupling at the ends of the coupling piece, a pin is insertable both through a hole of the component and through a hole of the coupling piece. The coupling pin clip is U-shaped, the legs of which have a distance from each other that corresponds to the distance of the two holes in the coupling piece. Furthermore, the coupling pin clip comprises a tipping finger articulated at one end of the coupling pin clip.

FIELD OF THE INVENTION

The invention relates to an insertable coupling for frame elements of a stackable scaffolding.

BACKGROUND OF THE INVENTION

Such scaffolding frame individual elements are used for, among other things, enabling the construction of the required base framework from a few individual parts for a substructure for ceiling formwork. To do this, the frame elements must be safely and securely stackable on each other. To this end, they include vertical supports formed as a hollow profile having vertical posts attached thereto. A connection of frame elements can be completed using a connecting sleeve. Connecting sleeves serving as coupling pieces are thus inserted in the one vertical post of a base frame and secured via a coupling pin with cotter pin in such a way that a portion of the connecting sleeve still protrudes from the vertical post in order to place a further vertical post thereon which is also secured via coupling pin and cotter pin. For a single connecting sleeve, two coupling pins are therefore required that are guided through aligning holes in the connecting sleeve and the vertical post and then each secured via cotter pin.

Couplers are also used for securing the connection, in which case the cotter pin is omitted. The coupler has a longitudinally extending pin which is guided through the openings in connecting sleeve and vertical post, wherein a section is provided that rests against the round outer circumferential side of the vertical post, surrounds it and either holds the coupler in its position by its own weight or is clamped to said outer circumference. In the case of a single connection coupling, two couplers are also needed here.

SUMMARY OF THE INVENTION

The object of the invention is to provide an insertable coupling for frame elements of a scaffolding or scaffolding frame that is easy to manipulate.

The coupling pin clip of the present invention is disclosed herein. It provides a new type of connection clip for, among other things, the scaffolding element mentioned above. Advantageous designs of the insertable coupling arise from the respective dependent claims.

The heart of the invention is coupling pin clip in the form of a U-shaped profile, the legs of which have a distance from each other corresponding to the distance of two bores in the coupling piece. Moreover, a tilting finger is articulated at one end of the coupling pin clip.

Thus, instead of a maximum of four elements being needed in the prior art for connecting two scaffolding frame elements for the coupling piece, only a single element, namely the coupling pin clip, is required. It is simultaneously inserted in all holes with which the coupling piece is to be affixed to the two scaffolding frame elements to be connected to each other.

The result is an increased assembly speed between the scaffolding components thanks to the improved ergonomics of the coupling pin system. The coupling pin clip is reliably self-securing and requires only a few manipulations to apply. An economical version is thus provided for an insertable coupling system. The length of the tilting finger is selected to be at least large enough that it cannot flip over within the tube and get jammed as a result.

The insertable coupling according to the invention for connecting scaffolding elements of a scaffolding as such is formed by a connecting adapter. This comprises:a coupling piece which is insertable between the scaffolding elements anda coupling pin clip as is described above.

The coupling piece of the connecting adapter having a centered circumferential abutment ring proves to be advantageous. This defines the insertion depth of the coupling piece on the first scaffolding frame tube. After the formation of the abutment, the second half of the coupling piece remains free for the placement of the second frame part.

Usually, the coupling piece is inserted in a hollow end of the vertical post. However, the present invention also functions in a configuration in which the coupling piece is placed at each of the two ends on the outer circumference on a tube end of a scaffolding frame. Of course, an intermediate solution is also feasible in which the one end of the coupling piece is inserted in a tube end and at the other end is placed on a tube end of the scaffolding frame.

DETAILED DESCRIPTION

FIG.1shows the coupling pin clip10according to the invention made of a U-shaped profile, at the end of which a tilting finger14is articulated. The tilting finger is eccentrically articulated between two end pieces of the one leg of the U-shaped profile in such a way that it tends to tilt into a vertical position via its gravitational force. As is shown in the lower view ofFIG.1, an abutment collar12also referred to as an end portion is formed by the tilting finger14if it is transverse to the leg of the clip10on which it is articulated. This abutment collar12also referred to as an end portion in the upper part of the figure forms the locking abutment that in the installed state of the coupling pin clip10prevents removal or prevents components from falling out.

The length of the tilting finger is selected to be at least large enough that it cannot flip over within the tube and get jammed as a result.

As shown in the figure, the tilting finger14also has a length with which it, in the locked state, leads from one leg of the U-shaped profile to the other.

That leg at which the tilting finger14is articulated also exhibits a slightly larger length than the other leg, so that the tilting finger14in the locking state can fall down at approximately a 90 degree angle. This articulation angle may be supported by a conically tapered end of the tilting finger14, which conical end can come to rest against a conical end of the free leg of the U-shaped profile. Furthermore, an insertion of the coupling pin clip10in said holes is made easier by the conical curve of, on the one hand, a leg of the U-shaped profile and, on the other hand, the end of the tilting finger14.

FIG.2shows an attachment of the insertable coupling to a frame section20of a scaffolding. A coupling piece16having a centered circumferential abutment ring16a(see Detail A) is inserted between the upright ends of vertical supports of the frame section20. The coupling pin clip10is inserted through the holes at the ends of the respective frame section, and specifically in such a way that the tilting finger14is aligned parallel to the leg of the U-shaped profile holding it.FIG.3shows this arrangement in the form of an inserted coupling pin clip10.

Next, the tilting finger14will automatically drop into the vertical position shown inFIG.4via its gravitational force. The upper end of the tilting finger14thus forms an abutment collar12against the sheath22of the frame section20, so that the coupling pin clip10in this shown position can no longer be removed from the holes and, thus, the connecting position.

FIG.5shows the interplay between the holes of the coupling piece16and the holes of the frame section20. The coupling piece is dimensioned somewhat smaller in its outer diameter, so that it is insertable in an open end of a frame section20. All holes here are aligned in the insertion direction of the coupling pin. The central abutment ring16aof the coupling piece16allows the coupling piece to be inserted a certain distance into the tube of the frame section20. The same applies for the frame section20which can be placed on the coupling piece16.

InFIG.6, the interaction of insertion pin clip10and coupling piece16is shown. It corresponds to the procedural steps as they are outlined above in connection withFIGS.2to4.

LIST OF REFERENCE CHARACTERS

10Coupling pin clip12Abutment Collar also referred to as an end portion14Tilting finger16Coupling piece16aCentral abutment ring20Frame section of a scaffolding22Sheath