EP2309076A2 - Scaffold click-in board - Google Patents

Abstract

The base part has two elongated, plate-shaped profiles (P) with a longitudinal side (1) and another longitudinal side, where each of the profiles has two hollow chambers formed as hollow cylinders. Wall thicknesses of the hollow chambers are same. The hollow chambers have a common wall part, and a locked connecting element provided at the longitudinal sides is the part of walls of the hollow chambers. A gripping groove (G) is formed at a lower side (3) of each profile as a component of the walls of the hollow chambers, where the profiles are formed as wooden cores with metallic surfaces. An independent claim is also included for a method for manufacturing a frame locked base part.

Description

The invention relates to a Gerüstrastboden as tread in scaffolding consisting of at least two elongated, plate-shaped profiles, which are fastened in each case with a first longitudinal side on the second longitudinal side of the adjacent profile, each profile has at its first longitudinal side at least one outstanding connecting element and in the second longitudinal side is introduced an equal or larger number of projecting into the profile connecting elements and the connecting elements of both longitudinal sides are at least partially complementary formed and at least one pair of corresponding connecting elements of two adjacent profiles is a latching connection.

When building scaffolding, z. As on the outer facade of buildings, it has long been state of the art that rod-shaped elements, for. B. of metal profiles form a framework in which scaffolding floors are attached as running, tread and work surface. There are many suggestions for the design of these scaffolding floors.

Presumably one of the oldest principles is to assemble the scaffolding floors from several parallel oriented boards that have been cut out of tree trunks. An example of this is the DE 38 08 100 with a scaffold floor of three solid wood board strips glued to a block.

With the cost reduction of steel sheet and ever more effective processes for its corrosion protection also bent and / or bent sheet steel profiles as a scaffold floor were economical. An example of this is the DE 195 15 062 , describes the framework floors of several, approximately U-shaped bent steel sheets. The two Legs of each U are each folded again, so that - viewed in detail - an approximately C-shaped profile is formed. The legs of the C act as a supporting rib and the intermediate area forms the tread.

The disadvantage is that such a scaffold floor in comparison to wooden floors or treads made of aluminum is relatively weighty and that the manufacturing process requires comparatively complex and large plate bending machines. A limitation may also be that a corrosion protection layer cracks in the area of the bends or even flakes off.

For this reason, scaffold floors made of aluminum are also known on the current state of the art. Since simple plates provide sufficient carrying capacity only with enormous material thickness, it is known to reinforce a relatively thin, horizontal aluminum surface on its underside by vertical ribs, such. B. the DE 94 137 22.6 shows. The ribs are stressed especially at their lowest edge very strong and on train. That's why it shows DE 94 137 22.6 a T-shaped widening of the lower edge of each rib, whereby the ratio between the total weight of the individual scaffolding floor profile and its maximum load capacity is significantly improved.

A further improvement in this sense presents the EP 0686 739 , Instead of only a T-shaped widening of each rib, the legs of adjacent T's are extended so far that a hollow profile closed on all sides is formed, so that the downwardly facing surface can absorb an even greater proportion of tensile stresses.

As the vertical ribs are spaced apart, however, the contribution of the profile at the bottom to the compensation decreases the tensile forces, which is why the scaffold floor according to EP 0686 739 consists of several, parallel hollow sections. These parallel profiles must be connected together during assembly. And not only so that the profiles do not fall apart during assembly, but above all, so that a punctual load of a single profile - such. B. from a shoe of a person on it - not only by the directly touched profile but also by the adjacent profiles is worn.

For such multi-part scaffold floors made of metal, a connection by welding is known in the current state of the art. This connection technology is mainly used in the automotive industry because automobiles are exposed for a considerably shorter time than scaffolding to direct weathering and the associated corrosion. Also unlike scaffolding, the body of a vehicle is covered by numerous layers of paint.

However, welded joints for scaffold floors are well known, but require care in processing to avoid deformation of the overall structure due to uneven heating during welding, as well as effective corrosion protection.

Another serious disadvantage is that in the region of the weld, the strength of the welded material can be significantly reduced by non-uniform heating and the resulting weakening of the profile in some places, which is why a reinforcement of the material at the welding areas is required.

Even when riveting the corrosion of the holes and rivets is a weak point, if not expensive, after the penetration of the holes galvanized sheets are used. A riveted joint is possible according to the current state of the art with relatively little effort for drilling the holes and for inserting and forming the rivet. In mass production, however, the process is relatively time-consuming and therefore expensive.

Since current state of the art hollow sections can be made relatively inexpensively even with complex shapes as extruded profiles suggests z. B. the EP 0686 739 the connection of adjacent profiles by tongue and groove. This, for centuries in timber construction proven connection, can be z. T. transferred to aluminum hollow sections, but is almost always extended by additional training of the profile.

The EP 068 67 39 proposes an L-shaped spring, which is introduced by a pivoting movement about the longitudinal axis of the profile in a complementary groove of the adjacent profile so that it forms an undercut in the groove of the adjacent hollow profile, which prevents withdrawal in the horizontal direction.

The DE 94 137 22.6 also presents a profile variant with an undercut through an L-shaped profile approach. Thus, in the assembly and high, pulse-like load shocks that twist a single profile piece against his neighbor, even at the peak of the load, the force can be transferred to the neighboring profile piece, the profile of DE 94 137 22.6 in addition to the undercut in a groove hooked L-shaped profile attachment still secured by a locking connection in this position.

A disadvantage of this locking connection is that it is arranged at the end of each of a web of the two adjacent profile pieces. Since a professionally designed extruded profile as far as possible in all areas has a constant wall thickness so that it does not twist and warp during cooling, a locking connection, which is supported on one side of the profile, secured only with half of the possible by a two-sided suspension force.

In order nevertheless to achieve the highest possible degree of security against the disengagement of the latching connections, the height of the two interlocking latching noses is to be selected relatively large, whereby the pivoting of the profile section required for latching increases and thus the risk of a fatigue fracture increases.

The profile of DE 94 13 722 .6 With webs offers the interstices between the webs the fingers of the human hand a possibility of intervention, which facilitates the gripping when setting up and dismantling a scaffold and thus makes the work faster. The thus achieved depth of engagement with the undercuts behind the widening of the front edges of the stand is so great that when inserting the hand to the possible stop the risk of injury increases, which in turn can greatly reduce productivity.

However, this possibility of intervention is missing according to the hollow chamber profile EP 0686 739 , Although it offers the advantage of higher stability through the profile design as a hollow chamber, but unfortunately only with both hands to reach safely.

Against this background, the invention has taken on the task of developing a multi-part scaffold floor, its own weight is low with the usual stability and resilience or that is particularly lightweight in relation to the load capacity and over the entire length of the profile away manually with particularly high security is tangible.

As a solution, the invention describes that each profile consists of at least two hollow chambers, which are each shaped as a general hollow cylinder and whose wall thickness is substantially the same everywhere substantially and which each have a part of their wall with at least one adjacent hollow chamber in common and at least one latching Connecting element on both longitudinal sides in each case part of the wall of a hollow chamber and at the bottom of each profile at least one grip groove is formed as a part of the wall of at least one hollow chamber.

The most important feature of the invention is the dual use of the walls of the hollow chambers: First, they create the stability of the scaffold floor, by deriving its burden. Thanks to the design as a hollow chamber only relatively little material is needed for it, so the profile is relatively easy. Since the walls of the hollow chambers are completely closed in the scope, they cause a full sufficient stability with the required safety reserve despite a relatively small wall thickness.

A very simple embodiment still resembles the well-known from the timber construction tongue and groove boards, as that they are also connected via a groove in a board and a complementary spring in a neighboring board, but with the two essential differences that the "board" is no longer a solid body, but at least a double hollow body and the two horizontal surfaces of the groove and the spring to a Connecting element are removed.

In the simplest case, this connecting element is a latching connection. It consists - as each locking connection - from a respective locking lug on the two surfaces to be joined together, which are partially complementary to each other and form an undercut in the potential extension direction. Both detents are pressed together by permanently elastic elements.

In the prior art permanently elastic, elongated elements are known, at one end of the locking lugs are attached and the other end is secured respectively to the object to be joined. At known extruded profiles webs are formed, at one end of a locking lug is formed and the other end is connected to the profile to be connected.

On the one hand, this single web must be sufficiently stiff to apply the necessary contact pressure, so that the profile is held together and, on the other hand, sufficiently elastic for it to be able to detach itself again from its counterpart.

In the configuration according to the invention, the greatest load on this connection is achieved when a nearly punctiform load, such as a corner of a falling plate strikes a profile piece of Gerüstrastbodens and thereby twisted. The limit for this load case is reached when the two locking lugs separate from each other, so that the two adjacent profile pieces are separated from each other and then the load is no longer of at least one adjacent profile piece is carried along, but must be taken in full by the affected profile piece itself.

A possible countermeasure would be the further stiffening of the resilient web. However, this would run counter to an optimal design of an extruded profile, which should have a constant wall thickness in all possible areas, so that it hardens evenly and without distortion and without distortion after extrusion.

Therefore, the invention proposes to suspend the latch not only on one side, but on two sides resiliently. This is the easiest to achieve when the walls of the profile itself is used as a suspension of the latch, which are also elastic in the wall regions of the profile thanks to the extrusion technology optimally selected, uniform wall thickness everywhere, as the molded webs.

It follows as an advantage that the contact pressure is doubled compared to a one-sided suspension with the same wall thickness. Another advantage is that in case of a break, only the suspension on one side fails, but on the other side it still remains. As a result, the result of a peak load compared to a total failure is significantly mitigated.

Another characteristic feature of the invention is each cavity itself. As already explained in the description of the prior art, a solid metal plate is too heavy as a scaffolding floor. A first weight reduction is achieved in that vertical webs are formed on the underside of a thinner plate. Because these webs at their lowest edge the biggest burden - experienced by tensile forces - they are widened there T-shaped. A more sustainable structure arises when the legs of adjacent T's are connected together to form a hollow body.

However, this is only useful if the bars are not too far apart in relation to the height of the profile. Therefore, the compound proposes that each profile of the Gerüstrastbodens consists of at least two hollow bodies. As a result, a further increased load-bearing capacity is achieved with a relatively much higher overall weight ratio.

In addition, it can thus be created without further increase in the total weight and without a reduction in the carrying capacity of the possibility for optimal access of a human hand during assembly.

As is known, a human hand then transmits the highest tensile force when the fingers and the back of the hand form a J as seen from the side and grasp the object between this J and the thumb. Then the uppermost member of the fingers forms an undercut acting in the pulling direction.

Such a grip option should be possible over the length of the profile away at any point. Therefore, openings in the underside of the profile are eliminated because they weaken the profile too much.

Instead, the invention proposes that the underside of one of the at least two hollow chambers of each profile is arranged closer to the top of the profile than an adjacent, other hollow chamber. As a result, a shoulder forms on the partition wall between the two hollow chambers at the bottom, behind which the first member of a finger can grip. This paragraph should therefore correspond approximately to the length of the inside of the uppermost limbs of the fingers of a human hand in an angled condition. It makes sense that it can be extended by the material thickness of a typical work glove. This corresponds to an absolute number of the order of 26 mm.

As a further optimized embodiment, it is proposed that the hollow chamber, which is larger than the surface of the profile, at the edge of each profile has a cross-section which is adapted in its dimensions to a clasp by a human hand. Then the thumb rests on the top of the profile, the metacarpal bones on the side edge of the profile and the fingers with the inner links on the underside of the hollow chamber and the last link of each finger on the outside of the extension of the partition wall between the two hollow chambers.

In a further improved variant, each profile piece on three hollow chambers, namely at the edge of each two large hollow chambers whose bottom is further removed from the top, as in the middle hollow chamber. Then the profile section can be taken quickly and safely even when Verklipsen to a scaffolding floor.

In the simplest variant, the scaffold floor consists of several identical profiles, for example extruded aluminum profiles, which can be manufactured according to the current state of the art of specialized companies at a relatively low cost.

With profiles that can be clipped together indefinitely, scaffold floors in a wide variety of widths can be easily and quickly clipped together.

As an improvement, two fasteners, rather than a single one, increase cohesion between two profiles without equally compromising the strength of the entire scaffolding floor. According to this principle, a connecting element can be arranged near the upper edge and near the lower edge of each longitudinal side.

Since a latching connection to overcome the locking point always requires a high force, it is a useful option to make a pair of fasteners as connectors. Mating has the advantage of a relatively low joining force during assembly, whereby the person to be mounted or the assembly machine can be more focused on the accuracy.

For further optimization of the assembly process should start with the forces-saving mating and only if both profiles are already aligned correctly by mating with each other, the high force is applied to engage in the second step.

In a further improvement step, the application of this high force for the latching is to be facilitated by the fact that the next profile to be clipped is itself used as a lever. Since the profiles are usually much wider than high, the invention proposes that on the longitudinal side of a pivot axis is provided, around which the profile to be applied can pivot, while the locking connection is closed. This pivoting follows in time to the insertion and activates the locking connection.

For the formation of a plug-in and rotary connection is required. The invention proposes that for this purpose a tongue is formed on the profile, which extends inclined to the edges of the profile. This tongue is arranged on the lower edge of the longitudinal side and engages in a groove on the underside of the adjacent profile. Because the tongue is inclined to the edges of the profile, both profiles are also inclined to each other during mating, so are in a position in which they still need not make a stable connection. Therefore, the tongue can be inserted with a lot of play in the groove, which facilitates the assembly very much.

As the groove widened inwardly, the tongue can pivot within the groove. As a result, the two profiles can be pivoted against each other and placed in their actual desired, aligned angular position.

It is a particular partial idea of this invention to provide a hinge function for the pivotal movement by forming the longitudinal side adjacent the groove at its lower edge to a retaining web which bounds the groove inwardly and which slopes down into the V-shaped notch between the root of the tongue and the adjoining longitudinal side snuggles. For a - limited - angle is thereby the lower edge of the holding web to the pivot axis, which pivot about which the tongue and the rest of the other profile. And that while until the locking connection between the upper edges of the two adjacent profiles engages. When mounted, the retaining bar ensures that the two profiles are not pressed apart, even if they are heavily loaded from their top, which is indeed the main function of a scaffold floor as a stepping and Abstellfläche.

In this embodiment, which is very easy to install, a scaffolding floor according to the invention is characterized by the following features:

In the profile of the first longitudinal side, a projection is formed near the upper edge, which engages in a complementary recess of the adjacent, second longitudinal side. On the projection a locking lug is arranged, which engages behind a complementary locking edge on the recess. This upper pair of connecting elements forms a latching connection.

Another pair of fasteners on the underside is a plug-in and pivot connection: On the profile of the first longitudinal side near the lower edge of a tongue is formed, which is aligned with respect to the bottom and the longitudinal side of the profile inclined. It engages in an inwardly widening groove on the underside of the adjacent profile. After pivoting the two profiles against each other, it lies partially on the inner surface of the groove.

As a pivot axis, the second longitudinal side passes at its lower edge in a holding web, which snuggles into the V-shaped notch between the root of the tongue and the first longitudinal side and slides there during the pivoting along.

Quite different than the relatively complex appearing description of the individual elements of this latching connection suggests, so that the connection of two profiles is a very simple process that can be performed manually for ordinary dimensions of scaffold floors easily by a single person or very much for mass production is easy to automate.

Their advantages are best explained by the description of engagement. In the first step, the tongue is inserted into the groove on the underside of a profile at the lower edge of the longitudinal side of another profile. Since the tongue is aligned obliquely both to the underside of the profile and to its longitudinal side, the two first profiles are also obliquely aligned with each other when inserting the tongue into the groove.

It is a special feature of the groove that it widens inwards from its entrance opening. As a result, the tongue can be pivoted within the groove, while the two profiles pivot against each other, wherein the pivot axis extends at the root of the tongue or within the groove. In this case, the two adjacent longitudinal sides of the two profiles to be connected move towards each other. In the course of this pivoting, the projection moves on the upper edge of the one longitudinal side to the complementary recess of the adjacent other longitudinal side. Thus, the locking lug on the underside of the projection always further approaches to the complementary locking edge on the recess of the other, adjacent profile.

Ideally, an inclined surface is formed in the locking lug, which is formed complementary to a similar inclined surface adjacent to the locking lug. These two inclined surfaces slide briefly before the latching of the two components on each other, as it is known, for example, the closing wedge and the striking plate of a room door anyone. As a result of this sliding movement, the projection is somewhat deformed so that the latching nose can move over the latching edge. If this point is exceeded, the projection jumps back by the elasticity of the material back to its original shape and the locking lug is now engaged behind the locking edge.

Meanwhile, the tongue has further pivoted within the groove and now abuts against the inwardly and downwardly facing part of the wall of the groove.

During this movement, the front part of the groove, which also forms the longitudinal side of the profile and acts as a holding web in the locking connection, is pivoted into the V-shaped notch between the root of the tongue and the associated longitudinal side and lies in the depth of the notch , During the process of clipping so the tongue has pivoted within the groove; wherein the pivot axis is the lower edge of the retaining web.

It is different when two adjacent clipped together adjacent profiles are loaded by a very large force on your surface. Within the limits of the elasticity of the material now a very tiny pivoting movement takes place, the pivot axis is located at the top of the two long sides:

The projection of the one profile is supported in the recess of the adjacent profile. As a result, within the limits of the play of the connection, the leading edge of the projection can roll on the surface of the recess at a very small angle. This tiny pivoting angle is limited by the play of the retaining web within the V-shaped notch between the root of the tongue and the first longitudinal side and by also very little play between the tongue and its bearing surface within the inner surface of the groove.

Due to the inventive design of outstanding from one longitudinal side elements and the corresponding counterparts on the other, adjacent longitudinal side thus creates a very easy to snap together compound, which is still very resistant.

In the simplest embodiment of a Gerüstrastbodens invention, several, locked-together profiles are inserted into a support frame of the framework. This support frame must form a support surface for the underside of all profiles at least in the region of the two end faces of the Gerüstrastbodens.

According to the current state of the art, however, other variants are customary for the connection between the scaffold floor and the scaffold. In order to adapt a Gerüstrastboden according to the invention to all conventional variants of the attachment, it is proposed as an alternative embodiment that all profiles are connected to each other at their ends by head pieces. These head pieces may for example consist of U-shaped profiles, of which the first leg of the U rests on the bottom and the second leg of the U on the top of each profile.

For the connection of the head pieces with the profiles of all known and conceivable variants can be used. For example, the head pieces can be glued to the profiles, they can be shrunk on it they can be welded on or permanently connected to the profiles by clinching. These proven connections are applicable without restriction and enable durable and robust scaffolding floors.

In an advantageous variant, the center piece of the U-shaped profiled head piece at a distance to the end edges of the profile. This creates slits that serve as drainage. Experience has shown that although moisture can penetrate between the head piece and the profiles in an approach of the head piece without seal, but not long escape at the same pace, so that disturbing amounts of water can accumulate in the cavity, there and back slosh and can flow with an inclination of the profile through the then sharply rising water pressure as a disturbing beam on the mining crew.

The simplest countermeasure is an enlargement of the gap between the head piece and the profile edge. As a result, although a little more water enters, but then flows away at the same pace immediately.

Since it is a principal advantage of Gerüstrastbodens invention that individual, damaged elements can be disassembled and replaced by new even during use by releasing the locking connection, it is consistent to connect the head pieces with a detachable connection with the profiles. For example, rivets are suitable, which can be drilled again or screws that can be screwed out. But even a welded joint can be solved with a cut-off machine just as quickly.

Quite consistently, however, would be a snap connection between the two head pieces and all profiles. Only then would the inventive idea of the latching connection between the profiles consistently used. An inventive Gerüstrastboden would then just as quickly mounted, as well as dismantled and e.g. provided with a replacement profile.

In each variant, the two head pieces serve to further stiffen and stabilize the Gerüstrastbodens. Another important function of the head pieces is the connection with the standardized fastening elements of the framework. There are e.g. Holes or other openings usual. Also common are hooks, which are placed from above on struts of the scaffold or other fasteners.

The headers may also serve as hangers for transporting the scaffolding member profiles in a vertical position by engaging a hook in the handle groove formed by the inwardly drawn second hollow chamber and engaging behind the header. If e.g. the hook of a crane should be too big for it, an oval intermediate piece can make the connection.

It is bent as an accessory of an elongated metal profile to an oval, which is open in the vicinity of one of its two circular arc segments and can be pushed with this opening on the head piece. With the adjacent to this opening, straight section, it is inserted into the handle groove formed by the second hollow chamber and engages with the front side of the groove in the grip groove, straight section behind the inner side of the head piece K, which on the projecting over the profile arc segment of Ovals the attachment of a crane hook or straps or other hangers is possible.

To facilitate the stacking of multiple scaffolding floors, the respective outer profiles can be provided on their outer sides with beads which are formed complementary to the adjacent edge. If multiple scaffolding floors are stacked on top of each other, these beads will grip around the edge of the scaffolding floor underneath to prevent slipping sideways.

In contrast to numerous variants with upwardly facing beads or other circumferential spacer elements, the invention proposes that the beads point downwards. They then preferably engage in recesses, heels or constrictions of the underlying scaffolding floor.

This orientation has the advantage that the beads on the top of the scaffolding floors do not form a tray in which moisture accumulates and together with dirt forms a slippery lubricating film or even freezes and becomes dangerous ice.

As a useful variant of edge profiles are used for this, instead of the fasteners on the upper edge have a paragraph in the profile and at the lower edge a complementary bead that engages when stacking in the shoulder of the underlying edge profile and does not interfere with the use in the framework ,

Another variant of a Gerüstrastbodens invention is the formation of the respective outer profiles as a reinforced longitudinal spar. Although this requires two different types of profiles, but overall material and thus cost savings can be achieved.

As already mentioned, it is a very interesting and economically viable method of making the profiles to press them as a strand of metal, e.g. made of aluminium. After this principle proven method very light, and thanks to the training as a hollow profile very strong profiles. Another advantage is that the contact lines of flat surfaces can be reinforced, which increases the rigidity of the hollow chamber profile.

Such a profile is not limited to aluminum, but in principle also applicable to other metals or alloys. In principle, very similar is the extrusion of plastics. Particularly interesting is the addition of stabilizing, thin fibers, which increase the resilience of the profile.

The profile of a Gerüstrastbodens invention is in principle also produced by bending a metal strip or more, interconnected metal strips.

The advantage of the high load capacity of folded sheet metal profiles is associated with the disadvantage of a much more expensive production. For example, such sheet metal profiles can be produced by stepwise shaping over corresponding profile rollers. Since these profile rollers are exposed to very high forces, they must be cured with care and be guided by a sufficiently resilient frame. To close the profile to a hollow chamber is then still always the welding of two sheet metal edges required. This effort can only be at a very high number of identical Profiles are worthwhile, as demonstrated, for example, by state-of-the-art technology for the production of crash barriers on motorways.

Figur 1

Schrägbild eines Gerüstrastbodens von unten her

Figur 2

Schrägbild wie Figur 1, jedoch von oben und ohne Kopfstücke

Figur 3

Schnitt durch zwei benachbarte Profile im Bereich ihrer Längsseiten

Figur 4

Schnitt wie Figur 3, jedoch kurz vor dem Einrasten

Figur 5

Stirnseiten von übereinander gestapelten Gerüstrast- böden

In the following, further details and features of the invention will be explained in more detail by way of examples. However, these are not intended to limit the invention, but only to explain. It shows in a schematic representation:

FIG. 1

Angled image of a scaffolding floor from below

FIG. 2

Oblique picture like FIG. 1 but from above and without head pieces

FIG. 3

Section through two adjacent profiles in the area of their long sides

FIG. 4

Cut like FIG. 3 , but just before snapping

FIG. 5

End faces of stacked scaffolding floors

The figures show in detail:

In FIG. 1 is an inventive Gerüstrastboden shown as a completely assembled unit in perspective; namely with a view of the lower sides 3 of the profiles P. In this embodiment, 4 interconnected with each other at their longitudinal sides profiles P are additionally connected to each other at its two end faces by a respective head piece K.

Each of the profiles P shows over the entire length of the recessed grip on its underside, which is formed by a hollow chamber H in each profile P, the bottom 3 forms a paragraph to the bottom 3 of the adjacent hollow chamber H and the gripping when mounting and dismounting facilitated. The outer profiles P differ from the two inner profiles P by the bead W at the lower edge, which serves as a guide when stacking several scaffolding floors.

At the front of the head piece K three hooks can be seen in this embodiment, with which the Gerüstrastboden can be hooked onto a crossbar. However, all other known variants, e.g. Holes or eyelets possible.

FIG. 1 shows an important feature of the invention, namely the longitudinally extending grip groove G, which is recessed against the adjacent lower sides 3, thereby enabling a hooking of the fingers of a human hand when handling. Since each of the connected here to a Gerüstrastboden profiles P has such a grip groove G, are in FIG. 1 four of these grooves G recognizable. The two inner ones were especially important in the assembly of the scaffolding load floor of the four profiles P. For the finished composite Gerüstrastboden especially the two outer are of importance.

FIG. 1 serves the overview of the arrangement of the profiles P and shows the connection of the profiles P by two head pieces. The connection of the profiles P by latching and latching is in FIG. 1 not recognizable, since the front side of the profiles P is covered by the head pieces K. After removing the head pieces K, the perspective of

FIG. 2 : Here, in a perspective view from the upper side 4 forth, two profiles P and their cross sections as a drawing separated from a Gerüstrastboden corner.

The size of the representation in FIG. 2 shows all the details of the locking connection and makes it clear that the longitudinal sides 1 and 2 of the profiles P are no flat, continuous walls. Rather, in each case a projection 11 protrudes into a recess 21 of the adjacent profile P at its upper edges. At the lower edge of the longitudinal sides, a tongue 13 is inserted into the groove 23 of the adjacent profile P.

FIG. 2 shows very clearly and clearly the distribution of a profile P in several hollow chambers H. Between two first hollow chambers H1 at the edges of a profile P in the middle of a second hollow chamber H2 is inserted. The distance lower edge 3 of the central hollow chamber H2 to the upper edge 4 of the profile P is less than the distance of the adjacent hollow chambers H1 to the surface 4th

This results in a grip groove G which extends along the entire profile P and serves at each point over the entire length for hooking the uppermost member of the fingers of a human hand; both in the Zusammenklipeln several profiles P to a scaffold floor or even when mounting a complete scaffolding floor.

Left in FIG. 2 At the edge of the scaffold floor is a special form of the first hollow chamber H1 can be seen: Instead of connecting means it is provided at the outer lower edge with a downwardly facing bead W. This bead W is complementary to a recess A shaped. Each edge profile of a Gerüstrastbodens has at both outer edges depending on such a recess A, in which when stacking a plurality of scaffolding floors above each other engages the bead W of the next Gerüstrastbodens lying thereon

This connection initially prevents the lateral slipping of a stack of Gerüstrastböden invention. In addition, the bead W but also acts as a spacer, which causes a small distance between two stacked Gerüstrastböden, so that minor contamination does not affect the stackability.

FIG. 2 shows very well that at the top 4 of the profile P no fluid accumulations can form, since there are no side walls that hold liquids back. This is an essential difference to other, non-inventive profiles that arrange the Stapelwulst on the top.

Right in FIG. 2 is a profile P shown only half: the middle, to the formation of the grip groove G retracted inward hollow chamber H2 is partially cut off graphically and only the left of the two hollow chambers H1 shown with complete profile. It can be seen how above a connecting means is formed as a latching connection in the projection 11 and below a connecting means is formed as a plug and pivot connection.

For an exact explanation of the connection serves FIG. 3 : It shows the cross section through two adjacent profiles P and only the area of two, contacting longitudinal sides 1 and 2 in the embodiment according to claim 8. Das in FIG. 3 drawn right profile P points at the top of the first Long side 1 a projection 11, marked here by a double arrow. This protrusion 11 projects into the recess 21 from the second longitudinal side 2 of the adjacent, left-hand profile P. In FIG. 3 it is clear that the projection 11 is formed complementary to the recess 21, so that the upper sides 4 of the two adjacent profiles P are aligned in a plane with each other.

In FIG. 3 is the locking lug 12 can be seen on the underside of the projection 11. It is locked in the - latched state shown here - behind the latching edge 22 on the recess 21 of the adjacent profile P. FIG. 3 clearly shows how before the latching lug 12 and behind the locking edge 22 depending a wedge-shaped contact surface is formed, which slide when mounting each other and thereby press the right-hand profile P apart by a very small degree and the left-hand profile P by a very small Squeeze measure, so that the locking lug 12 can slide over the locking edge 22 by means of the two contact surfaces and behind the locking edge 22 engages.

In FIG. 3 is very easy to understand, as required for locking the locking lug 12 with the locking lug 22 spring movement is distributed in each case on the walls on both sides.

At the lower edge of the two longitudinal sides 1 and 2 can be seen how the tongue 13 of the right profile P engages in the groove 23 on the bottom 3 of the left profile P. In - latched state - shown here, the tongue 13 rests on the inwardly facing inner surface of the groove 23.

In FIG. 3 It is easy to see how a force acting vertically on top 4 is absorbed by the tongue-and-groove connection. If a vertical force vector presses on the right-hand profile P, it propagates through the profile and also acts on the tongue 13. Since the edge of the tongue 13, like the complementary groove 13, is inclined relative to the underside 3, it acts Arrangement like an inclined plane; ie, the tongue 13 slides on the inner surface of the groove 23. Without the holding web 24, the right-hand profile P would thus migrate away from the left-hand profile P and the connection would be released.

However, this movement is the holding web 24 in the way, which engages in the V-shaped notch 14 between the root of the tongue 13 and the first longitudinal side 1. The retaining bar 24 blocks the sliding movement of the tongue 13 on the inner surface of the groove 23 and thus ensures the bond between the two profiles P. Therefore, the vertical force vector is derived from the tongue 13 on the inner surface of the groove 23 and thus on the left profile.

FIG. 3 shows two adjacent profiles P in the locked state. The leading snap action is shown in

FIG. 4 : In the FIG. 3 drawn sections of two adjacent profiles are reduced graphically to two, very short profile segments.

In the illustrated phase of locking the tongue 23 of the right profile P is already inserted into the groove 23 and the retaining bar 24 is located very short of the V-shaped notch 14th

In FIG. 4 the pivoting of the right profile P against the left profile P is represented by an arrow at the top of the picture and in the center of the picture. It is understandable that in a further pivoting of the right profile P, the pivot axis lies approximately in the region of the V-shaped notch 14 and on the lower edge of the retaining web 24. As a result, the contact surface of the latching lug 12 slides along the contact surface of the latching edge 22 along.

FIG. 4 illustrates how the narrow projection 11 of the right profile P is slightly raised when sliding these two surfaces, so that the locking lug 12 slides over the locking edge 22 away and snaps into the recess 21 behind the locking lug 22.

FIG. 4 shows how the tongue engages at the lower edge of the one profile P only in a corresponding counterpart of the other profile P and then pivoted therein and as on the upper edge of the two adjacent profiles P, the locking lug 12 engages behind the locking edge 22.

The disassembly of two interconnected profiles P is possible in reverse order. For this purpose, the left profile P is meaningfully clamped or otherwise blocked. Then the connection between the locking lug 12 and the locking edge 22 is released, z. B. by depressing the top 4 of the left profile P and by a slight lifting of the projection 11 on the right profile P.

As soon as the latching lug 12 has moved over the latching edge 22, the two contact surfaces of the latching lug 12 and the latching edge 22 slide on one another. With the help of these two contact surfaces and the elasticity of the two profiles P they are separated.

During the pivoting movement, the tongue 13 is also pivoted further and further until it is almost parallel to the second longitudinal side 2 of the left profile P runs. In this state, the tongue 13 can be removed from the groove 23 by the right profile P is moved vertically downward.

FIG. 4 makes it clear how easy and nevertheless secure the connection of the two adjacent profiles P takes place and how quickly disassembly is possible again. This makes it realistic that z. B. damaged profiles P can be removed from an otherwise still fully suitable Gerüstrastboden and replaced by a single, new profile P.

It should be noted again that in a simple variant adjacent profiles P only by the in the Figures 3 and 4 shown meshing of fasteners are interconnected. Depending on the dimensions of the projection 11 and the locking lug 12 and the locking edge 22, a scaffolding trunk floor according to the invention can also be used without heads K.

It makes sense to then the lower surfaces 3 of all profiles P are held in the vicinity of their front edges by a corresponding bearing surface. This simple type of connection is then no longer applicable if a bearing surface is missing at the ends of Gerüstrastböden. Then each head K with a suitable connection element is required.

In FIG. 5 the front sides of three stacked scaffolding floors are drawn, as well as in FIG. 2 only the left edge, each with a fully represented and a half drawn professional pl. Die FIG. 5 illustrates very clearly how at the bottom of each profile P and that at the outermost first hollow chamber H1 a bead W is attached. This Bead W engages in the recess A of the next, underlying profile P, thereby preventing lateral slippage of the stack. In the FIG. 5 embodiment shown also uses the beads W even as a spacer element to make between the stacked profiles P in the vertical direction at a distance, so there is no moisture permanently holds or even smaller soils affect the stackability.

In FIG. 5 It becomes clear that thanks to the orientation of the beads W down there could be no moisture collecting between them, which is more often to be complained of in other scaffolding floors with upward-facing circumferential beads.

LIST OF REFERENCE NUMBERS

A

Recess at the upper edge of a longitudinal side 1 or 2, complementary to the bead W

G

Grip groove on the underside 3 of the profile P

H

Hollow chambers in profile P

H1

first hollow chamber

H2

second hollow chamber

K

Head piece, connecting several profiles P frontally

P

profile

W

Bead, on a long side 1 or 2

1

first longitudinal side of the profile P

11

Projection, on the first longitudinal side 1

12

Latch, on the projection 11

13

Tongue, on the first longitudinal side 1

14

V-shaped notch, between the root of the tongue 13 and the first longitudinal side. 1

2

second longitudinal side of the profile P

21

Recess, on the second longitudinal side 2, complementary to the projection 11th

22

Locking edge, on the recess 21, complementary to the latching nose 12

23

Groove on the bottom 3 of the profile P, takes on tongue 13

24

Retaining web, extension of the second longitudinal side 2, in addition to the V-shaped notch 14

3

Bottom of the profile P

4

Top of the profile P

Claims (19)

Gerüstrastboden as tread in scaffolding consisting of at least two elongated, plate-shaped profiles P, which are each secured with a first longitudinal side 1 on the second longitudinal side 2 of the adjacent profile P, wherein - Each profile P at its first longitudinal side 1 has at least one protruding connecting element and - In the second longitudinal side 2 an equal or greater number of projecting into the profile P connecting elements is introduced and - The connecting elements of both longitudinal sides 1 and 2 are at least partially complementary to each other and formed - At least one pair of corresponding connecting elements of two adjacent profiles P is a latching connection. characterized in that each profile P consists of at least two hollow chambers H, - Which are each formed as a general hollow cylinder and - Whose wall thickness is substantially the same everywhere substantially and - Each have a part of their wall with at least one adjacent hollow chamber H in common and - At least one latching connection element on both longitudinal sides 1.2 each part of the wall of a hollow chamber H and - At the bottom 3 of each profile P at least one grip groove G is formed as a part of the wall of at least one hollow chamber H. Gerüstrastboden according to claim 1, characterized in that the dimensioning of the wall thickness and the material of the wall causes a permanent elasticity, which allows a multiple engagement and disengagement of the locking means designed as a connecting means. Scaffolding floor according to one of the preceding claims,
characterized in that the grip groove G extends with a constant profile over the entire length of a hollow chamber H. Scaffolding floor according to claim 3, characterized in that the depth of the handle groove G opposite at least one adjacent bottom 3 of the length of the inside of the angled, uppermost member of the fingers of a human hand plus the material thickness of a typical work glove corresponds. Scaffolding floor according to claim 4, characterized in that the depth of the grip groove G is about 26 mm. Scaffolding floor according to one of the preceding claims,
characterized in that the profile cross section of at least two adjoining hollow chambers H outside the connecting means and outside of the grip groove G is approximately a rectangle. Gerüstrastboden according to claim 6, characterized in that the grip groove G is formed by the bottom 3 of a second hollow chamber H2 to at least in the region near a first, adjacent thereto hollow chamber H1 by the amount G closer to the top 4 of the hollow chamber H1 is arranged as the underside 3 of the first hollow chamber H1. Gerüstrastboden according to claim 7, characterized in that at least one profile P consists of two hollow chambers H2 and in between an adjacent to both hollow chamber H1. Scaffolding floor according to one of the preceding claims,
characterized in that
near the top and
near the lower edge of each longitudinal side 1 and 2 each a connecting element is arranged. Scaffolding floor according to claim 9, characterized in that - The first connecting element as a locking connection and - The second connecting elements as a plug connection or as a rotary plug connection are formed. Scaffolding floor according to claim 10, characterized in that - As a first connection element in the profile cross section of the first longitudinal side 1, a projection 11 is formed, which in a thereto complementary recess 21 of the adjacent second longitudinal side 2 engages and - On the projection 11 a locking lug 12 is arranged, which engages behind a complementary locking edge 22 on the recess 21 and - As a second connecting element in the profile of the first longitudinal side 1 near the lower edge of a tongue 13 is formed, - Which is aligned with respect to the bottom 3 and the longitudinal side 2 of the profile P inclined and - engages in a, inwardly flared groove 23 on the bottom 3 of the adjacent profile P and - Rests partially on the inner surface of the groove 23, wherein - The second longitudinal side 2 passes at its lower edge in a holding web 24, - Which limits the groove 23 and - Which engages in the V-shaped notch 14 between the root of the tongue 13 and the first longitudinal side 1. Gerüstrastboden according to one of the preceding claims, characterized in that all profiles P are connected to each other at their end faces by head pieces K. Scaffolding floor according to one of the preceding claims, characterized in that the head pieces K are profiled in a U-shape and the first leg of the U rests on the bottom 3 of each profile and the second leg of the U rests on the top 4 of each profile. Scaffolding floor according to one of the preceding claims,
characterized in that the center piece of the U-shaped profiled head piece K is spaced from the end edges of the profile P. Scaffolding floor according to one of the preceding claims,
characterized in that on the head piece K - Drilling and / or - other openings and / or - Hook and / or - grooves and / or - other fasteners are attached. Scaffolding floor according to one of the preceding claims,
characterized in that as an accessory a crane hook is bent from an elongated metal profile to an oval, which is open in the vicinity of one of its two circular arc segments and with this opening on the head piece K can be pushed and with the adjacent to this opening, straight section in the formed by the second hollow chamber H2 grip groove G can be inserted and engages with the front side of the in-grip groove G, straight section behind the inside of the head piece K, which on the projecting over the profile arc segment of the oval, the attachment of a crane hook or straps or from other hangers becomes possible. Scaffolding floor according to one of the preceding claims,
characterized in that on the respective outer longitudinal sides 1 or 2 of the outer profiles P are formed on a lower edge of beads W, which are formed complementary to the adjacent edge. Scaffolding floor according to one of the preceding claims,
characterized in that the profiles P a - Extruded profile or - Extruded profile or - folded sheet metal or - Wooden core with metal surfaces are. Method for producing a scaffolding floor according to one of the preceding claims, characterized in that - In the first step in the groove 23 of a first profile P, the tongue 13 of a second profile P is introduced and - In the second step, the second profile P is pivoted against the first profile P, wherein the axis of rotation is about the root of the tongue 13, until the locking lug 12 touches the locking edge 22 and - In the third step, the locking lug 12 engages behind the locking edge 22 and at the same time the tongue 13 is applied to the wall of the groove 23 and the retaining web 24 snuggles into the V-shaped notch 14 and - In the fourth step, another profile P is clipped to the first profile pair according to the steps one to three, and in the last step, a respective head piece K is mounted on the front side of the profiles P.

Images