EP4361375A1 - Wedge for wedged fastening of a connecting head of a scaffolding component to a scaffolding post of a scaffolding tower - Google Patents

Abstract

The present invention relates to a wedge (1) for fastening a scaffolding component (3) with a connection head (2) consisting of an upper head part (21) and a lower head part (29), which define a slot (20) between them, with which the connection head (2) can be plugged onto a projection (41) of a scaffolding post (4) of a scaffolding (5), the wedge (1) having an elongated wedge body (11) with a front end face (12) and a rear end face (13), a wedge head (14) and a wedge foot (15), wherein the wedge (1) has a support modification (16, 16a, 16b, 16c) on the front end face (12) or the rear end face (13), which is shaped such that the wedge (1) can be supported in a mechanically stable support position with the support modification (16, 16a, 16b, 16c) on a wedge support area (2135) of a Upper side (213) of an upper head part (21) of the connection head (2). Furthermore, the invention relates to an arrangement using such a wedge, comprising a scaffolding post (4) with a projection (41) and a scaffolding component (3) with a connection head (2).

Description

The present invention relates to a wedge for the wedged fastening of a connection head of a scaffolding component to a scaffolding post, in particular a vertical one, of a scaffolding, comprising an elongated wedge body with a front end face and an opposite rear end face, a wedge head and a wedge foot. The wedge according to the invention is used for the wedged fastening of the connection head of the scaffolding component to the scaffolding post of the scaffolding, wherein the scaffolding post defines a longitudinal direction and has a projection extending transversely to this longitudinal direction with a projection wedge opening for inserting the wedge through, and wherein the connection head has an upper head part located above a slot suitable for attaching the connection head to the scaffolding post and defining a slot plane, with an upper wedge opening extending perpendicular to the slot plane and a lower head part located below the slot with a lower wedge opening also extending perpendicular to the slot plane and aligned with the upper wedge opening.

In the case of scaffolding, it is known to attach scaffolding components, such as horizontal or diagonal bars, to scaffolding posts of the scaffolding, in particular those that run vertically, using connection heads that are positively attached to a projection of the scaffolding post that has an opening or perforation for inserting a wedge. Perforated discs are usually used as suitable projections for the scaffolding posts. These are several disc-shaped elements that have openings suitable for inserting a wedge, are arranged concentrically to an axis of symmetry of the scaffolding post and are welded to the scaffolding post.

The connection heads to be wedged onto these perforated discs or other suitable projections of the scaffold post have a two-part Construction of an upper head section and a lower head section, which define a slot between them, which is delimited by a slot base in the direction of the connection side connected to the component. The connection head can be plugged onto the projection, in particular the perforated disk, by means of the slot. The upper and lower head sections each have a wedge opening running perpendicular to a slot plane, whereby the wedge openings of the upper and lower head sections are aligned with one another, whereby a wedge can be pushed through them after the connection head has been plugged onto the projection, in particular the perforated disk, so that the connection head and thus the scaffolding component to which it is connected is wedged positively onto the scaffolding post.

In the disclosure document WO 2012/163349 A2 An international patent application proposes an improvement to the connection heads described above, in which a wedge support body is present inside the connection head above the slot, which can support the wedge in the area of its wedge foot, i.e. its lower end, in a mechanically stable support position in which the wedge projects forwards over the connection head and protrudes from the top of the connection head. This innovation makes it possible for a single worker to connect a wedge head to a scaffolding post in a single process, namely by moving the connection head with the wedge in the support position therein essentially horizontally towards the projection of the scaffolding post, the connection head being aligned relative to the scaffolding post projection, e.g. a perforated disk, in such a way that the plane of the slot of the connection head coincides with a plane of the scaffolding post projection. From a certain approach, the wedge head that overlaps the connection head to the front will come into contact with the scaffold post, so that as the connection head continues to move towards the scaffold post, the wedge rotates around the abutment formed by the wedge support body inside the connection head and is thereby increasingly erected. At a critical approach distance, corresponding to a critical angle of rotation of the wedge, the support body can no longer support the wedge at its lower end and the wedge falls under its own weight or, as in the WO 2012/163349 A2 also proposed, with the aid of spring force downwards. By appropriately designing the connection head and the support body, it is ensured that this critical approach point is reached when the upper and lower wedge openings are essentially aligned with the opening or breakthrough in the projection, so that the wedge falls automatically, ie without further intervention by the worker or an assistant, through the wedge opening in the upper part of the wedge, the wedge opening in the projection and the wedge opening in the lower part of the wedge and can assume its final locking position.

This design of the wedge head makes the assembly, i.e. the connection of a scaffold component to a scaffold post, significantly easier and faster. This is particularly possible by means of the WO 2012/163349 A2 proposed connection head could be installed by a single worker, whereas previously two workers were generally required, one to hold the scaffolding component and the other to insert the wedge through the connection head and the projection.

The disadvantage of the WO 2012/163349 A2 However, the advantage of the teaching presented is that specially designed connection heads are used, namely those with a wedge support body described above inside the connection head. This makes it necessary to replace existing connection heads of scaffolding components with those proposed in the aforementioned publication in order to implement the teaching there and use the simplified assembly process. The connection head is a relatively complex-shaped and therefore expensive component, which is nevertheless required in considerable quantities in order to build a scaffold with a large number of scaffolding components, for example horizontal bars as scaffolding board supports or railings. or handrail or diagonal bars for bracing.

Against this background, the present invention has set itself the task of enabling a simple and quick connection of a connection head to a scaffolding post by just one worker, without having to provide specially designed connection heads for this purpose.

This object is achieved by a wedge according to claim 1 and an arrangement using such a wedge according to claim 10.

The innovation of the invention lies in the fact that a specially designed wedge is used which has a support modification by means of which the wedge can be supported on the top of a conventional connection head in a mechanically stable support position, so that in a similar way to that described above, a single worker can attach a scaffolding component with a connection head and a wedge according to the invention located in the support position to a scaffolding post of the scaffolding in a single movement. The support modification can in particular be a nose protruding over the front or rear side of the wedge or a notch made in the front or rear side. The position, shape and dimensions of the support modification are selected so that it can cooperate with the top of the connection head to support it in a support position, so that the wedge is held sufficiently stable, at least temporarily, until the connection head is placed on the projection, e.g. perforated disk, of the scaffolding post.

In order to ensure the mechanical stability of the support position, the tilting moment acting on the wedge, which would tilt it around its support on the top of the connection head, must be compensated. However, this is already achieved by the usual, laterally protruding anti-loss projections or anti-loss rivets, which prevent the wedge foot from coming out of the upper wedge opening, i.e. the wedge opening in the upper part of the wedge. Alternatively or additionally, the wedge can also be supported with the wedge foot on the inner wall of the upper wedge opening in order to absorb the tilting moment described. Depending on the design of the wedge according to the invention, this support takes place on the slot base side, i.e. in the direction of the side on which the connection head is connected to the scaffolding component, or on the opposite inner wall of the upper wedge opening.

Compared to the connection head itself, the wedge according to the invention is a much simpler and cheaper component, and its new purchase is therefore much cheaper than replacing the connection head. Connection heads of the usual design without an internal wedge support body can thus continue to be used and yet be expanded to include the option of the well-known simplified assembly by a worker. The advantages of a simpler assembly of a scaffold are thus achieved at a much lower cost. The costs are not only lower because the purchase of specially designed connection heads is not necessary, but also because connecting these connection heads to the scaffold component to be attached means additional effort, which can be advantageously avoided when using a wedge according to the invention in conjunction with existing scaffold components and connection heads.

Advantageous further developments of the inventions are contained in the dependent claims 2-9 and 11-15 and will be presented individually below. It is obvious to the relevant person skilled in the art that these further developments can in principle be combined with one another in any way, provided that they do not obviously exclude one another.

In some embodiments of the wedge according to the invention, the support modification is a protruding over the front face of the wedge Nose. This has the advantage that the wedge is not weakened by the support modification, which could affect its stability and its ability to serve its locking function.

In alternative embodiments of the wedge according to the invention, however, the support modification is a depression or notch made in the front side, i.e. the front side, or the opposite back side or rear side of the wedge. This means that the wedge is structurally weaker than a conventional wedge, but this is not detrimental to its suitability for producing a stable and secure locking mechanism, since the support modification, i.e. the notch here, is arranged in the lower third, preferably at a height of between one sixth and one quarter of the wedge length measured from the lower wedge end, which protrudes from the lower wedge opening, i.e. the opening for inserting the wedge in the lower head section, in the locked position of the wedge.

It is preferred to design the support modification, whether in the form of a nose or a notch, in such a way that in the area that contacts the top of the connection head, it is shaped complementarily to the shape of the surface in this support area. This achieves improved hold and greater stability of the wedge in the support position, for example against unwanted tipping or rolling of the scaffolding component. This stability can be improved even further if the contact area of the support modification and accordingly also the support area of the top of the support head are designed to be convex or concave.

Alternatively, the contact area and support area can also be simply flat, which corresponds to the design of the upper side of conventional connection heads. A flat support area can form a contact area with the front side of the connection head that touches the scaffold post, or with the front side of the upper wedge part that touches the scaffold post in a support area above the projection used for connection. Angles of between 80 and 140 degrees. The inventors have determined in tests that an angle of between 110 and 130 degrees offers an optimal compromise between stability in the support position and the ease of movement of the wedge when attaching the connection head to the projection of the scaffolding post.

The wedge according to the invention is preferably wider in its head region than in its foot region, so that a higher wedge clamping force builds up with increasing penetration depth into the wedge openings. In addition, it is preferred if the wedge body has a bend in its course. The bend is preferably oriented in such a way that the wedge foot is offset in the direction of the rear end of the wedge facing away from the scaffold post. This reduces the projection of the wedge in front of the end faces of the connection head and thus the wedge, or more precisely the wedge head, only touches the scaffold post when the connection head comes closer to the latter. This prevents the wedge from being destabilized prematurely from its support position by contact with the scaffold post too early and falling too early into the wedge opening of the connection head, i.e. before it is in a suitable position relative to the breakthrough or opening of the projection of the scaffold post. With a wedge without bending, assembly is also possible, but in this case the attachment must be carried out quickly enough so that the connection head is already pushed far enough onto the projection, despite the relatively earlier contact of the wedge head with the scaffolding post, until the wedge head, delayed by its inertia, has fallen through the upper wedge opening and reached the slot.

The bend can be between one degree and thirty degrees, but is preferably between 10 and 20 degrees. The bend is also preferably located in the lower part, more precisely in the lower half of the wedge body. The support modification of the wedge according to the invention is also preferably arranged at the apex of the bend.

The wedge base of the wedge according to the invention can be semi-circular, as with conventional wedges. Preferably, however, the wedge base has a bevel so that a tip is formed, which is also preferably rounded, so that it can slide more easily along the inside of the wedge openings. The main advantage of the bevel and the tip is that the wedge cannot get caught on the top of the scaffold post projection, for example the perforated disk, without falling through the opening in the projection and further into its locking position.

The bevel preferably faces the wedge side which is opposite the wedge side with the support modification, so that the tip of the wedge foot is correspondingly offset relative to an imaginary wedge center line towards the wedge side with the support modification.

The bevel preferably forms an angle of between 100° and 150°, in particular approximately 120°, with the front or rear side in the area of the wedge foot.

In preferred embodiments, the length of the wedge below the support modification is dimensioned such that the wedge foot extends into the slot of the connection head in the support position. The projection of the wedge foot over the underside of the upper part of the connection head, which limits the slot at the top, is particularly preferably between 1 - 5 mm or between 10 - 50% of the height of the slot. This ensures that the wedge touches the top of the scaffold post projection when pushed onto it, which already destabilizes it somewhat from the support position and then falls better and more reliably into its locking position.

In some embodiments of the wedge according to the invention, the length of the wedge below the support modification, or equivalently the height of the support modification above the lower wedge end, is selected such that the support modification is between one seventh and one third of the total length of the wedge or wedge body, preferably between 15% and 20% of the total length.

In some embodiments, the wedge base has anti-loss pins that protrude beyond the side surfaces of the wedge. A span of these anti-loss pins is selected to be larger than a lateral width of the upper end of the partial opening of the upper wedge part, so that the wedge cannot be completely pulled out of the upper wedge opening or fall.

In some embodiments of the invention, the anti-loss pins also serve to stabilize the wedge in the support position. The anti-loss pins prevent the wedge foot from being pulled out of the upper wedge opening by the tilting moment acting on the wedge, which rotates it around its support point in the contact area between the support modification of the wedge and the support area of the upper head part of the connection head.

In some embodiments, alternatively or in addition to the anti-loss pins, the inner wall of the upper wedge opening of the upper head section absorbs the described tilting moment by supporting the wedge with its wedge foot on the inner wall. In the case of a support modification in the front of the wedge, this support takes place on the rear, slot-base-facing inner wall of the upper wedge opening, whereas in the case of a support modification in the back of the wedge, this support takes place on the opposite, front-facing inner wall of the upper wedge opening.

Further features, properties and advantages of the present invention emerge from the embodiments explained in more detail below with reference to the figures. These are intended only to illustrate the present invention and in no way to limit its generality.

Figur 1A:

Eine erste Ausführungsform eines erfindungsgemäßen Teils mit einer Abstützmodifikation in Form einer Nase an der Keilvorderseite.

Figur 1B:

Eine zweite Ausführungsform eines erfindungsgemäßen Keils mit einer Abstützmodifikation in Form einer Kerbe in der Keilvorderseite.

Figur 1C:

Eine dritte Ausführungsform eines erfindungsgemäßen Keils mit einer Abstützmodifikation in Form einer Kerbe in der Keilhinterseite.

Figur 1D:

Eine Vorderansicht einer der Ausführungsformen nach den Figuren 1A - 1C eines erfindungsgemäßen Keils mit seitlichen Verliersicherungsstiften am Keilfuß.

Figur 2A, 2B:

Längsschnitte durch eine erste Ausführungsform einer erfindungsgemäßen Anordnung, welche einen erfindungsgemäßen Keil gemäß der ersten Ausführungsform nach Figur 1A einsetzt.

Figur 3A, 3B:

Längsschnitte durch eine zweite Ausführungsform einer erfindungsgemäßen Anordnung, welche ein einen erfindungsgemäßen Keil gemäß der zweiten Ausführungsform nach Figur 1B einsetzt.

Figur 4A, 4B:

Längsschnitte durch eine dritte Ausführungsform einer erfindungsgemäßen Anordnung, welche ein einen erfindungsgemäßen Keil gemäß der dritten Ausführungsform nach Figur 1C einsetzt.

Figur 5A:

Längsschnitt durch eine Ausführungsform der erfindungsgemäßen Anordnung ähnlich der in den Figuren 3A und 3B gezeigten, welche jedoch eine leicht abgewandelte Ausführungsform des in Figur 1B gezeigten erfindungsgemäßen Keils einsetzt, bei welcher der Keilfuß eine Abschrägung aufweist.

Figur 5B, 5C:

Längsschnitte, welche den Vorteil der in Figur 5A gezeigten abgewandelten Ausführungsform des erfindungsgemäßen Keils im Vergleich zu der Ausführungsform des Keils aus Figur 1B illustrieren.

Figur 6A - C:

Längsschnitte durch eine vierte Ausführungsform einer erfindungsgemäßen Anordnung, welche ein eine leichte Abwandlung des in der Figur 5A eingesetzten Keils verwendet.

In detail:

Figure 1A:

A first embodiment of a part according to the invention with a support modification in the form of a nose on the wedge front side.

Figure 1B:

A second embodiment of a wedge according to the invention with a support modification in the form of a notch in the front side of the wedge.

Figure 1C:

A third embodiment of a wedge according to the invention with a support modification in the form of a notch in the rear side of the wedge.

Figure 1D:

A front view of one of the embodiments according to the Figures 1A - 1C a wedge according to the invention with lateral anti-loss pins on the wedge base.

Figure 2A, 2B:

Longitudinal sections through a first embodiment of an arrangement according to the invention, which comprises a wedge according to the invention according to the first embodiment according to Figure 1A uses.

Figure 3A, 3B:

Longitudinal sections through a second embodiment of an arrangement according to the invention, which shows a wedge according to the invention according to the second embodiment according to Figure 1B uses.

Figure 4A, 4B:

Longitudinal sections through a third embodiment of an arrangement according to the invention, which shows a wedge according to the invention according to the third embodiment according to Figure 1C uses.

Figure 5A:

Longitudinal section through an embodiment of the arrangement according to the invention similar to that shown in the Figures 3A and 3B shown, which however is a slightly modified version of the one shown in Figure 1B shown wedge according to the invention, in which the wedge foot has a bevel.

Figure 5B, 5C:

Longitudinal sections, which take advantage of the Figure 5A shown modified embodiment of the wedge according to the invention compared to the embodiment of the wedge from Figure 1B illustrate.

Figure 6A - C:

Longitudinal sections through a fourth embodiment of an arrangement according to the invention, which is a slight modification of the Figure 5A inserted wedge is used.

Figures 1A-1C show various embodiments of a wedge according to the invention. In the Figure 1A A slightly exaggerated perspective view shows a wedge 1, 1a which has a nose 16a protruding or projecting beyond a front end face 11 of the wedge as a support modification 16. The wedge tapers from the wedge head 14 to the wedge foot 15, i.e. the distance between the front end face 12 and the rear end face 13 of the wedge body 11 decreases continuously. In the lower half of the wedge body 11, the wedge 1a has a bend with a bending angle of approximately 15 degrees. The support nose 16a, which is approximately triangular in side view, is located in the lower half of the wedge in the area of the apex of the bend. The distance from the lower end of the wedge to the support nose 16a is approximately one fifth and up to one quarter of the total length of the wedge body 11.

The wedge base 15 is semi-circular in accordance with the usual design and has two captive rivets or pins 15 on each side, which protrude beyond the side surfaces 17, 18 of the wedge. In conjunction with a correspondingly narrow mouth of the upper wedge opening 210 of the wedge upper part 21, as in the Figures 2A - 5C As shown, this effectively prevents the wedge 1 from being pulled out of the upper wedge opening 210 or from falling out, for example when the connection head is rotated so that the top part of the head 21 points downwards.

The Figure 1B shows in a slightly exaggerated perspective a second embodiment of a wedge 1b according to the invention, which in shape and dimensions essentially corresponds to the embodiment of Figure 1A but has a notch 16b as a support modification 16. The support notch 16b, which is approximately triangular in side view, is located at a similar location on the wedge front side 12 as the support nose 16a of the embodiment of the Figure 1A .

The Figure 1C shows a wedge 1c according to the invention according to a third embodiment, again in a slightly exaggerated perspective view. The essential difference to the embodiments from the Figures 1A and 1B is that the support modification 16, here in the form of a notch 16c, is present in the wedge rear side 13. As a result, the wedge 1 in the support position, which projects over the top 213 of the head upper part 21, does not protrude forwards over the connection head, but backwards, as in the Figures 4A and 4B illustrated. Instead of the notch 16c, a support nose projecting beyond the back of the wedge 13 would also be conceivable.

In Figure 1D is a front view of a wedge according to the invention according to one of the embodiments of the Figures 1A - 1C shown. The wedge 1 has a support modification 16 in the lower area of the wedge body 11, which can be a nose or notch. In addition, the wedge foot 15 of the wedge 1 has anti-loss pins 151 protruding from the side surfaces 17, 18. These effectively prevent the wedge from being accidentally pulled out or falling out of the upper wedge opening. Falling out of the lower wedge opening is prevented by the fact that the wedge head 14 has a stepped thickening 141, as in each of the Figures 1A - 1C good to see.

The Figures 2A and 2B show longitudinal sections through an arrangement according to the invention, in which the wedge 1a according to the invention according to the first embodiment of Figure 1A is used. As shown, the wedge 1a is in a mechanically stable support position in which the support nose 16a is supported on the support area 2135 of the top side 213 of the upper head section 21, with the wedge body 11 protruding with approximately three-quarters of its length beyond the top side 213 and in the process overlapping the connection head 2 forwards in the direction of the scaffolding post 4. This clearly shows the center of gravity SP of the wedge 1 in front of the front sides 211 and 291 of the upper head section 21 and the lower head section 29. This causes a tilting moment to act on the wedge 1, which rotates it about its support point on the wedge support area 2135 and tends to lever the wedge foot 15 out of the upper opening 210 of the upper head section 21. This is prevented on the one hand by the anti-loss pins 151 of the wedge foot 15, and on the other hand this tilting moment is also compensated by the fact that the wedge foot 15 rests on the rear inner boundary surface of the upper wedge opening 210, i.e. in the direction of the base 201 of the slot 20 or the connection side 25 of the connection head 2, and thus supports itself on this.

The Figures 2A, 2B show the time of a connection process in which the wedge head 14 is just coming into contact with the scaffolding post 4. If the component 3, and thus the connection head 2, is moved further in the direction of the scaffolding post 4, the wedge is tilted relative to the connection head and, from a certain critical approach point, falls under its own weight into the upper wedge opening 210. The geometry of the support nose 16a and wedge support area 2135 is selected so that this only happens when the perforated disk 41 of the scaffolding post reaches at least far enough into the slot 20 that the wedge 1 cannot close the slot 20 prematurely and prevent further movement of the scaffolding component 3 by sliding into the lower wedge opening 290. If the connection head is moved sufficiently quickly onto the scaffolding post 4, the wedge 1, due to its inertia, only reaches the slot 20 when the connection head already touches the scaffolding post 4 in the upper support area 42 or lower support area 48 with the front sides 211, 291 of the upper head section 21 or lower head section 29, so that the wedge can continue its vertical movement by sliding through the perforated disc opening 410 and the lower wedge opening 290 then located underneath and can assume its final control position.

The Figures 3A and 3B shows a further embodiment of an arrangement according to the invention, which essentially corresponds to that of the Figures 2A and 2B with the difference that a wedge 1b having a support notch 16a in the front side 12 of the wedge body 11 according to the Figure 1B is used.

The Figures 4A and 4B show a third embodiment of an arrangement according to the invention, which essentially corresponds to that of the Figures 2A and 2B or 3A and 3B, with the difference that here a wedge 1c having a support notch 16a in the rear side 13 of the wedge body 11 according to the Figure 1C is used.

In contrast to the first and second embodiments, the wedge 1c in the support position does not protrude forwards, in the direction of the front side 211 over the connection head 2, but backwards in the direction of the component 3 or the connection side 25, on which the connection head is connected to the component 3. Since with such an alignment when the connection head 2 is placed on the perforated disk 41 there is no direct contact between the wedge 1c and the scaffolding post 4, the wedge 1c must be destabilized in another way from the mechanically stable support position so that it can fall into the locking position as intended. It is conceivable to solve this procedurally by pushing it on with enough momentum that the wedge is destabilized by the abrupt braking of the connection head as soon as it contacts the scaffolding post. Tests by the applicant have shown, however, that more reliable destabilization can be achieved by giving the wedge foot 15 a certain distance D into the slot 2, i.e. the length of the wedge 1c below the support modification 16 is selected accordingly. In the case of a wedge projecting forwards according to the Figures 1A and 1B , used in the arrangements of the Figures 2A - 3C, such a protrusion is neither necessary nor useful.

In the Figure 5A is a sectional drawing of a further embodiment of an arrangement according to the invention, which is similar to the Figures 3A, 3B similar, with the difference that a slightly modified version of the wedge 1 from the Figure 1B is used, in which the wedge on the wedge base 15 has a bevel 152 facing the rear wedge face 13. This results in a tip 153 for the wedge base 15 that is offset from an imaginary center line of the wedge in the direction of the front wedge face 12. The tip 153 is rounded so that the wedge 1c can be released from the locking position using a hammer without damaging the hammer or tip 153. The bevel 152 forms an angle of approximately 130 degrees with the rear wedge face 13 in the area of the wedge base 15, although other values are also possible.

The advantage of bevel 152 is evident from the comparison of the bevels shown in the sectional drawings of the Figures 5B and 5C situations presented. The Figure 5B shows an arrangement according to the Figures 3A and 3B , but at a time when the connection head 2 is completely pushed onto the perforated disk 41, so that the connection head 2 contacts the scaffolding post 4. Further movement forward is therefore no longer possible. In this example, the wedge 1 has been destabilized from its support position, but has not fallen into the desired locking position, but remains in an intermediate position in which the wedge foot 15 rests on a section 411 of the top of the perforated disk 41. In order to bring the wedge 1 into its locking position, further intervention is therefore necessary, either by the worker guiding the component, which is difficult to impossible, or by an assistant.

The unwanted intermediate position can only be taken because the semi-circular wedge foot can stand sufficiently stable on the top 411. As in the Figure 5C As can be seen, this is effectively prevented by the bevel 152 of the wedge foot 15. It is geometrically impossible for the tip 153 of the wedge foot to stand up on the upper side 411 and thus the wedge 1 falls into its locking position as desired in all cases.

The Figures 6A - 6C show in three longitudinal sections an embodiment of the arrangement according to the invention, which uses a wedge with a support notch arranged near the wedge foot in the front side of the wedge and thus a modification of the Figure 1B illustrated second embodiment of a wedge according to the invention.

The figures show different stages of connecting the connection head 2 to the perforated disc 41 of the scaffold post 4. The Figure 6A the time of first contact between wedge head 14 and scaffold post 4, Figure 6B a point in time shortly before the critical approach and thus rotation of the wedge 1 is reached, from which point the support modification 16 can no longer hold the wedge on the support area 2135 of the connection head 2, and finally Figure 6C a point in time at which the wedge 1b, when falling, contacts the boundary of the wedge opening 410 in the perforated disk 41 with its bevel 152 on the rear side of the wedge foot 15 and is safely guided into the wedge opening by said bevel 152, instead of, for example, unintentionally remaining on the upper side of the perforated disk 41.

The wedge 1b is designed largely like the wedges 1 presented in the other figures, and has, like the wedge 1 of the Figure 1B a notch 16b as a support modification 16 in the wedge front side 12. The difference to the wedge 1 from Figure 1B lies in the positioning of the notch 16b: in contrast to the wedge 1 of the Figure 1B where the notch is located at a height above the lower end of the wedge, which is approximately one fifth of the wedge length, it is in the modification of the Figures 6A - 6C only about 16% above the lower end of the wedge. This supports the Figure 6A In the support position shown, the wedge foot 15 does not rest on the inner wall of the upper wedge opening 210, but is only held in the upper wedge opening 210 by the anti-loss pins 151.

The positioning of the notch 16b comparatively close to the wedge foot 15, in conjunction with the curvature of the wedge body 11 in the area of the support notch 16b, results in a more upright position of the wedge 1b in the support position, whereby it only comes into contact with the vertical post 4 later when connected to it. This helps to prevent the support position from being left too early and the slot 20 from closing prematurely. In addition, the larger projection of the wedge 1b over the top 213 of the connection head increases the moment of inertia of the wedge 1b when rotating about its support point on the support area 2135 of the top 213, which reduces the risk that the wedge 1b will be displaced by the impact from the scaffold post 4 when contact is made into a position that is also stable but unsuitable for automatically falling into the locking position, in which the wedge rests on the top of the component 3.

Like the wedge of Figures 5A and 5C The wedge also has the design of the Figures 6A - C a bevel 152 on the rear side of the wedge foot 15 and, associated therewith, a tip 153 in the front area of the wedge foot, ie offset relative to the wedge center line in the direction of the wedge front side 12. As in connection with the Figures 5A - 5C describe, this effectively prevents the wedge 1 from remaining on the upper side of the perforated disc 41 without falling through the wedge opening 410 and lower wedge opening 290 into the locking position.

List of reference symbols

1, 1a, 1b, 1c

wedge

11

Wedge body

12

front face of 11

13

rear front/back of 11

14

Wedge head

15

Wedge foot

151

Anti-loss rivets

152

bevel

153

Great

16

Support modification

16a

Support nose on 12

16b

Support notch in 12

16c

Support notch in 13

2

Connection head

20

slot

201

Slot base

21

Head top

210

upper wedge opening

211

Front side of 21

213

Top of 21

2135

Support area for 16

25

Connection side

29

Head base

290

lower wedge opening

291

Front of 29

3

Scaffolding component

4

Scaffolding post

41

Perforated disc

411

Top of 41

42

upper support area

48

lower support area

SP

Focus of 1

D

Overhang from 15 into 20

Claims (15)

Wedge for fastening a connection head (2) of a scaffolding component (3) to a scaffolding post (4) of a scaffolding (5), comprising an elongated wedge body (11) with a front end face (12) and a rear end face (13), a wedge head (14) and a wedge foot (15),
marked by a support modification (16, 16a, 16b, 16c) on the front end face (12) or the rear end face (13), which is shaped such that the wedge (1, 1a, 1b, 1c) can be supported in a mechanically stable support position with the support modification (16, 16a, 16b, 16c) on a wedge support region (2135) of an upper side (213) of a head upper part (21) of the connection head (2), and wherein the wedge in the supporting position protrudes beyond the upper side (213) and overlaps the connection head (2) rearwardly in the direction of a connection side (25) of the connection head (2) at which it is connected to the scaffolding component (3), or forwardly in the direction of a front end side (211) of the head upper part (21) opposite the connection side (25). Wedge according to claim 1, wherein the support modification is a support notch (16c) introduced into the rear end face (13) or a support nose protruding beyond the rear end face (13) and the wedge (1) protruding beyond the upper side (213) of the head upper part (21) engages over the connection head (2) rearwardly in the direction of the connection side (25). Wedge according to claim 1, wherein the support modification (16, 16a) is a support nose (16a) protruding beyond the front end face (12) or a support notch (16b) introduced into the front end face (12) and the wedge (1) protruding beyond the upper side (213) of the head upper part (21) engages over the connection head (2) forwards in the direction of the front end face (211). Wedge according to one of the preceding claims, wherein the wedge body (11) has a greater width, i.e. a greater distance between the front end face (11) and the rear end face (12), in a region of the wedge head (14) than in the region of the wedge foot (15), in particular in the region of the wedge head (14) has a step-shaped thickening (161). Wedge according to one of the preceding claims, wherein the wedge body (11) is bent and has a bending angle between 1 and 30 degrees, in particular between 10 and 20 degrees, and wherein the bend preferably offsets the wedge foot (15) in the direction of the rear end face (13). Wedge according to the preceding claim, wherein an upper half of the wedge (1, 1a, 1b, 1c) is substantially straight, and only a lower half of the wedge (1, 1a, 1b, 1c) is curved. Wedge according to one of the preceding claims, wherein the length of the wedge (1, 1a, 1b, 1c) below the support modification is dimensioned such that - the wedge foot (15) in the support position projects into a slot (20) of the connection head (2), wherein a projection of the wedge foot (15) over an underside of a head upper part (21) of the connection head (2) which delimits the slot (20) at the top is preferably between 1 - 5 mm or between 10 - 50% of a height of the slot (20), and/or - the support modification (16, 16a, 16b, 16c) is located at a height above a lower end of the wedge which corresponds to between one seventh and one third, preferably between 15% and 20% of the length of the wedge body 11. Wedge according to one of the preceding claims, wherein the wedge foot (15) - semi-circular, and/or - has a rounded tip (153), and/or - has a bevelled underside (152) which preferably forms an angle of between 100° and 150°, in particular approximately 120°, with the rear side (13) in the region of the wedge foot (15). Wedge according to one of the preceding claims, wherein the wedge (1) has, in the region of the wedge foot (15), anti-loss projections (151) protruding over side surfaces perpendicular to the front end face (12) and rear end face (13). Arrangement comprising: - a wedge (1, 1a, 1b, 1c) according to one of the preceding claims, - a scaffold component (3) with a connection head (2) connected to it on a connection side (25), - a scaffold post (4) of a scaffold (5), wherein the scaffold post (4) has a projection (41) extending transversely to a longitudinal direction of the scaffold post (4) with a projection wedge opening (410) for inserting the wedge (1), and • wherein the connection head (2) has an upper head part (21) located above a slot (20) suitable for plugging the connection head (2) onto the projection (41) and defining a slot plane, with an upper wedge opening (210) running perpendicular to the slot plane, and a lower head part (29) located below the slot (20) with a lower wedge opening (290) running perpendicular to the slot plane and aligned with the upper wedge opening (210), and • wherein the connection head (2) can still be uncovered or plugged onto the projection (41) so that the projection (41) extends into the slot (20) and the projection wedge opening (410) is connected to the upper wedge opening (210) and the lower wedge opening (290) is aligned so that the wedge (1) can be stretched or inserted through the upper wedge opening (210), the projection wedge opening (410) and the lower wedge opening (290) in order to wedge the connection head (2) and thus the scaffolding component (3) with the scaffolding post (4) in a form-fitting manner, wherein an upper end face (211) of the upper head part (21) facing the slot opening is supported on an upper support region (42) of the scaffolding post (4) located above the projection (41) and a lower end face (291) of the lower wedge part (29) facing the slot opening is supported on a lower support region (48) of the scaffolding post (4) located below the projection (41), and • wherein the wedge (1) with its support modification (16) is supported on or in a mechanically stable support position on a wedge support region (2135) forming part of an upper side (213) of the head upper part (21) which has migrated away from the slot (20), in particular located between the upper end face (211) or connection side (215) and the upper wedge opening (210), so that the wedge (1) protrudes over the upper side (213) in the support position and overlaps the connection head (2) forwards in the direction of the upper end face (211) or backwards in the direction of the connection side (25). Arrangement according to the preceding claim, wherein the wedge support region (2135) is a flat surface which forms an angle of between 75° and 135°, preferably between 90° and 120°, in particular with the upper end face (211) of the upper wedge part (21). The assembly of claim 10, wherein the wedge support portion (2135) is a concave surface. Arrangement according to one of claims 10 - 12, wherein a region of the support modification (16) of the wedge (1) contacting the wedge support region (2135) in the support position has a shape complementary to a shape of the wedge support region (2135). Arrangement according to one of claims 10 - 13, wherein the support position is mechanically stable in that the wedge foot (15) in the support position contacts a connection-side or a front-side boundary surface of the upper wedge opening (210), so that a tilting moment tilting the wedge (1) about its support point on the wedge support area (2135) towards the slot plane and driving the wedge foot (15) out of the upper wedge opening (210) is compensated by the wedge foot (15) and guided into the connection head (2) via the slot-base boundary surface of the upper wedge opening (210). Arrangement according to one of claims 10-14, wherein a wedge (1) with anti-loss projections (151) is used and the support position is mechanically stable in that the anti-loss projections (151) in the support position contact side surface-facing edges (210R, 210L) of the upper wedge opening (210), so that a tilting moment tilting the wedge (1) about its support point on the wedge support area (2135) towards the slot plane and driving the wedge foot (15) out of the upper wedge opening (210) is compensated by the anti-loss projections (151) and guided via edges of the upper wedge opening (210) into the connection head (2).

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