EP3591140B1 - Heavy duty bolt, scaffold, method for producing a heavy duty bolt, method for manufacturing a scaffold - Google Patents

Description

The invention relates to a heavy duty harrow, a framework, a method for producing a heavy duty harrow and a method for producing a framework according to the preamble of the independent claims.

It is known that heavy duty harrows, due to the high strength requirements, are mainly made of steel in the form of several partial profiles and then connected to one another, for example by welding. This construction of several partial profiles is particularly disadvantageous in terms of production, since the individual parts have to be connected to one another in a complex manner. Furthermore, due to the strength requirements, such heavy duty bars are mostly made of steel and are therefore relatively heavy.

From the EP0276487A2 a reinforced, elongated frame part with a tubular ring cross-section and a T-profile protruding downward is known. Such a framework part should be easy to manufacture and have clear static conditions and clear strength conditions.

The disadvantage of the known frame part is that it consists of an extruded profile which is provided with a profile for reinforcement.

From the DE102015109623A1 a scaffolding ledger is known which consists of two partial profiles, the lower profile having recesses for the vertical implementation of scaffolding elements.

The disadvantage of the known scaffolding ledger is that the two partial profiles have to be connected to one another by welding and so the production is labor-intensive and correspondingly expensive.

From the DE102014100498A1 a framework element is known which consists of two partial profiles. In one exemplary embodiment, one of the partial profiles is designed as a round profile, in another exemplary embodiment one of the partial profiles is designed as a U-profile. From the EP 1650376 A2 a scaffold beam made of aluminum with an upper profile, a middle profile and a lower profile is known.

Another disadvantage of this framework element is that two partial profiles have to be connected to one another during the manufacture of the element.

It is the object of the present invention to create a heavy duty bar which avoids the night parts of the prior art and in particular a heavy duty bar according to claim 1, a scaffolding according to claim 7, a method according to claim 9 for producing a heavy duty bar and a method according to claim 11 for To create a framework in which the heavy duty bar is particularly easy to manufacture, light and yet solid.

The object is achieved by a heavy duty harrow, a method for producing a heavy duty harrow and a method for producing a framework according to the independent and dependent claims.

According to the invention, a heavy duty harrow for use on a frame comprises an upper profile, a middle profile and a lower profile. The upper profile is designed in such a way that fastening means for fastening the heavy duty bolt can be fastened to the upper profile. According to the invention, the heavy duty harrow is designed in such a way that the upper profile, the middle profile and the lower profile are formed in one piece.

It has proven to be advantageous that this simplifies the manufacture of the heavy duty bolt, since there is no need to connect different partial profiles. The heavy duty harrow can thus be manufactured in a single piece. Due to the design of the upper profile, a simple attachment of the fastening device for connecting the heavy duty bolt to other frame parts can be ensured and the production of the heavy duty bolt (including the connecting device) can be further simplified.

One-piece means that the three profiles of the heavy-duty bolt are made from a single material in one piece and that several separate pieces are not joined together to form a heavy-duty bolt using a connection technique.

The upper profile, the middle profile and the lower profile differ from one another in terms of shape, orientation and / or thickness of the material, at least insofar as they are directly adjacent profiles.

In one embodiment, the fastening elements are designed as recesses on the upper profile. The fastening elements can be designed in such a way that a fastening device, for example a wedge head, can easily be attached in the heavy-duty harrow. In the case of a hollow profile, a fastening device can be inserted into the profile and fixed via the fastening elements. The fastening elements can therefore comprise holes. For example, the fastening element in the upper profile can be designed in such a way that a fastening device can be clicked into the fastening elements without tools. There is no need to tighten screws or other fasteners. This further simplifies the manufacture of the heavy duty harrow.

In a preferred embodiment, the upper profile of the heavy duty bolt is designed as a round profile.

It has proven to be advantageous that a round profile enables particularly advantageous strength and uniform force distribution. A round profile also enables a simple insertion of a fastening device, the round profile at least partially surrounding the fastening device at the same time and thus protecting it from bad weather conditions.

In a preferred embodiment, a lower profile of the heavy duty bolt is designed as a U-profile or a round profile. It has proven to be advantageous that a U-profile has a high level of strength and buckling resistance. This makes it possible to manufacture the heavy duty harrow with less heavy materials, in particular with light metal.

According to the invention, the center profile of the heavy duty bolt has at least two recesses for the implementation of scaffolding elements.

Thus, the heavy duty harrow can be built into a scaffold, whereby transverse elements running perpendicular to the heavy duty harrow can also be built into the scaffold. Such a heavy duty harrow can be used particularly universally due to the cutouts and is suitable for the construction of various scaffolding. The same heavy duty harrow can be used for different scaffolding structures.

In one embodiment, the cutouts are designed as essentially rectangular cutouts. Cutouts in other Embodiments such as oval or N-cornered recesses are also conceivable.

According to the invention, the heavy duty harrow has at least one recess of a first type with a first length in the direction of the longitudinal axis. The heavy duty harrow also has a recess of a second type with a second length in the direction of the longitudinal axis. The first and second lengths differ in size.

The longitudinal axis runs along the length of the heavy duty harrow.

This allows a more flexible design of a framework with this heavy duty harrow according to the invention. In particular, transverse elements of different sizes can be used in this way.

In one embodiment, the heavy duty harrow comprises a plurality, in particular four or three, recesses of a first type and a plurality, in particular five or four or three or two, recesses of a second type. The first type of recess is longer in the direction of the longitudinal axis than the second Type of recess.

Such heavy duty harrows allow a great variety in the construction of scaffolding.

In one embodiment, the central profile has a wall thickness of 1 mm to 6 mm, preferably 2-5 mm, particularly preferably a wall thickness of 3 mm. The wall thicknesses of the upper profile and the lower profile are preferably in the range of 2-7mm, in particular 3-5mm.

Such wall thicknesses allow heavy duty bars to be produced which have sufficient strength.

In a preferred embodiment, the upper profile comprises a wedge head for fastening the heavy duty bolt to a perforated disk of a vertical post.

A wedge head is a head which is designed to accommodate a wedge and a perforated disk, the perforated disk being able to be guided into the wedge head and the wedge head being insertable in a form-fitting manner by inserting the wedge into a hole in the perforated disk. Such wedge heads are well known from the prior art.

In one embodiment, the heavy duty bolt comprises holes in the upper profile for fastening the wedge head.

It has proven to be advantageous that the wedge head can easily be connected to the upper profile in this way. In one embodiment, the wedge head and the holes are designed so that the wedge head can be clicked into the holes. This enables a particularly simple connection of the wedge head to the upper profile without the need for tools.

In a preferred embodiment, the lower profile or the central profile and the lower profile are at least partially trapezoidal in longitudinal section.

The result is a heavy duty harrow that is stable due to the middle profile and the lower profile and yet can easily be attached between vertical posts, as the trapezoidal shape allows the heavy duty harrow to be easily inserted between the vertical posts.

The upper and lower profiles are preferably round or U-profiles. The center profile is preferably a web. This information applies to the cross-section.

In a preferred embodiment, the heavy duty harrow is made of light metal. In a particularly preferred embodiment, the heavy duty bar is made of aluminum or an aluminum alloy, in particular an aluminum extrusion process.

This creates heavy duty harrows that are particularly light and therefore particularly easy to handle. The heavy duty harrows can thus be moved without great effort, especially lifted upwards. The lightweight construction of the heavy duty harrow means that it can be handled by just one person. This simplifies the use of the heavy duty harrow.

In a preferred embodiment, the central profile in cross section has only one contact with the upper and / or lower profile.

It has proven to be advantageous that the heavy duty harrow is particularly simple and stable, that is to say reinforced by the central profile and the lower profile.

In one embodiment, the length of the lower profile is 50% to 150% of the length of the lower profile in cross section. In cross section, the length of the lower profile is preferably 75% to 125%, particularly preferably 70% to 110% of the length of the central profile.

In one embodiment, the length of the upper profile is 40% to 140% of the length of the lower profile in cross section. Prefers In cross section, the length of the upper profile is 60% to 120%, particularly preferably 70% to 110% of the length of the lower profile.

This gives you an optimal ratio of force distribution and weight.

A scaffold according to claim 7 also leads to the solution of the object. The scaffold comprises at least one heavy duty bar as described above and below. The frame further comprises at least a first vertical post and a second vertical post. The heavy duty harrow is attached vertically to the two vertical posts.

It has proven to be advantageous that such a framework is stable and yet light due to the high strength of the heavy duty bar, since the heavy duty bar can be made of a correspondingly light material due to the high fat content due to its shape.

In a preferred embodiment, scaffolding elements run vertically through the recesses of the heavy duty bolt.

The strength of the scaffolding can be reinforced by additional elements that are guided through the recesses in the heavy duty bolt. A scaffolding with a heavy duty harrow with recesses allows a variety of different scaffolding constructions without having to rely on another heavy duty harrow.

The object is also achieved by a method according to claim 9 for producing a heavy duty harrow. The heavy duty harrow as described above is produced by extrusion.

Extrusion allows the heavy duty harrow to be manufactured from one piece. The time-consuming manual connection of individual profile parts is no longer necessary. The production of the heavy duty harrow can thus be carried out particularly economically.

In a preferred embodiment, the method for producing the heavy duty bar comprises a further step in which recesses are cut out. In a particularly preferred embodiment, cutouts are made from the central profile. The recesses are preferably milled. However, cutting or eroding would also be conceivable.

In a first step, the heavy duty harrow can thus be manufactured from one piece, that is to say in one piece. Then, in a second step, this can be provided with cutouts by mechanical processing so that, despite the one-piece production, the implementation of scaffolding elements through the heavy-duty bolt is made possible. The simple and economical production can thus be used without having to forego the flexibility in the framework construction, which is made possible by the cutouts.

A method according to claim 11 for producing a framework also leads to the solution of the object. When moving, a heavy-duty harrow is mounted between two vertical posts as described above and below.

The result is a scaffold, as described above, in which the advantageous heavy-duty harrow is installed and which therefore enables a wide range of scaffolding construction options with a relatively light construction due to its particularly high strength.

In a preferred embodiment, the method for producing the scaffolding comprises, in a further step, the introduction of a scaffolding element running perpendicular to the heavy-duty bolt into a recess in the heavy-duty bolt.

In this way, the framework can be reinforced with additional elements.

Figur 1:

Eine schematische Darstellung eines nicht erfindungsgemässen Schwerlastriegels in einer ersten Ausführungsform in einer Längsansicht.

Figur 2:

Schwerlastriegel aus Figur 1 im Querschnitt entlang der Linie A-A.

Figur 3:

Eine weitere Ausführungsform eines nicht erfindungsgemässen Schwerlastriegel in Längsansicht.

Figur 4:

Schwerlastriegel aus Figur 3 in einem Querschnitt entlang der Linie B-B.

Figur 5:

Der Schwerlastriegel aus Figur 1 in einer Seitenansicht.

Figur 6:

Sechs verschiedene Ausführungsform eines erfindungsgemässen Schwerlastriegel in Längsansicht.

Figur 7:

Ausführungsbeispiel eines erfindungsgemässen Gerüsts.

The invention is explained further below with the aid of exemplary embodiments. Here show:

Figure 1:

A schematic representation of a heavy duty bar not according to the invention in a first embodiment in a longitudinal view.

Figure 2:

Heavy duty harrow Figure 1 in cross section along the line AA.

Figure 3:

Another embodiment of a heavy duty harrow according to the invention in a longitudinal view.

Figure 4:

Heavy duty harrow Figure 3 in a cross section along the line BB.

Figure 5:

The heavy duty harrow Figure 1 in a side view.

Figure 6:

Six different embodiments of a heavy duty harrow according to the invention in a longitudinal view.

Figure 7:

Embodiment of a scaffold according to the invention.

Figure 1 shows a first embodiment of a heavy duty bar 1. The heavy duty bar 1 consists of an upper profile 3, a middle profile 4 and a lower profile 5. The heavy duty bar 1 is produced in this embodiment by aluminum extrusion. The upper profile 3, the middle profile 4 and the lower profile 5 are made in one piece. The upper profile 3 and also the lower profile 5 are designed as a round profile. The central profile 4 and the lower round profile 5 have a trapezoidal shape in longitudinal section. The upper profile 3 comprises fastening means 7 at both ends in the form of bores 7, into each of which a wedge head 7 is clicked. The wedge head 7 is thus connected to the heavy duty bolt 1 and enables the heavy duty bolt 1 to be connected to other scaffolding elements via the wedge of the wedge head 7. Four recesses 6 are made in the central profile 4. The recesses 6 are evenly spaced along the length of the central profile 4.

Figure 2 shows the heavy duty harrow 1 of the first embodiment in a cross section along the line AA in Figure 1 . The upper profile 3 is designed as a round profile. The center profile 4 is designed as a straight profile. The lower profile 5 is in turn designed as a round profile. The heavy duty harrow 1 is made from one piece, that is to say the profiles 3, 4, 5 are one piece and thus made continuously from the same material. There is no need for connection points between the profiles 3, 4, 5. The central profile 4 has only one contact with the upper round profile 3. The central profile 4 likewise has only one contact with the lower round profile 5.

Figure 3 shows a further embodiment of a heavy duty harrow 1 not according to the invention. The heavy duty harrow 1 consists of FIG This exemplary embodiment also consists of an upper profile 3 designed as a round profile, a straight central profile 4 and a lower profile 5, which is U-shaped in this exemplary embodiment. The upper profile 3 and the lower profile 5 are of equal length. The central profile 4 is shorter than the upper and lower profiles 3, 5. The central profile 4 has two recesses 6 which are arranged symmetrically to the center of the heavy duty bolt 1 viewed in the longitudinal direction. The heavy duty bolt 1 has fastening means 7 which are designed in the form of bores 7 in the upper profile 3. These holes are present at both lateral ends of the heavy duty bolt 1. The bores 7 are designed and arranged on the upper profile 7 in such a way that a wedge head 7 with appropriate attachments matched to the bore can be clicked into the upper profile 3 at both ends of the heavy duty bolt 1. The wedge heads 7 can thus be attached to the upper profile 3 by simply clicking them in. The wedge head 7 enables the heavy duty bolt 3 to be attached to other scaffolding elements.

Figure 4 shows the cross section of the heavy duty harrow 1 from Figure 3 along the line BB in Figure 3 . The upper profile 3 is designed as a round profile. The center profile 4 is designed as a straight profile. The lower profile 5 is designed as a U-profile. In this exemplary embodiment, the U-profile is designed with U-parts running perpendicular to one another. The U-profile comprises a lower U-part running perpendicular to the middle profile 4 and two further U-parts running perpendicular to this lower U-part. In the lower U-part an attachment is formed in the middle, on which the middle profile 4 attaches. The U-parts running vertically in each case are reinforced at the bottom, that is to say at the ends that lead away from the lower U-part. The heavy duty harrow 1 is made from one piece, which is why the heavy duty harrow 1 does not have any connection points, that is, an interruption in the heavy duty harrow material. There is no need for connections between the profiles, for example in the form of welded connections. The heavy duty harrow 1 is produced by aluminum extrusion.

Figure 5 shows the heavy duty harrow 1 of the first embodiment in a side view. The lower profile 5, which is designed as a round profile, can be seen. The middle profile 4, which connects the lower profile 5 with the upper profile 3 (not visible), can also be seen. The upper profile 3 is covered in this view by the wedge head 7 attached in the upper profile 3. The wedge head 7 consists of a wedge which is captively connected to the wedge head 7, an upper wedge head and a lower wedge head. The upper and lower wedge heads are at least partially separated from one another by a slot. The upper and lower wedge heads each have an opening through which the wedge can be passed. If the wedge lies in the wedge head 7 in such a way that it partially penetrates the two openings, it enables a form fit with a further frame element arranged in the slot and designed accordingly. The further element can, for example, be a perforated disk which can be inserted into the slot of the wedge head 7 and in which the holes are designed so that the wedge can be guided into them in a form-fitting manner.

Figure 6 shows six different exemplary embodiments of a heavy duty bolt 1 according to the invention. All six exemplary embodiments have an upper profile 3, a middle profile 4 and a lower profile 5. The center profile 4 is partially designed to be trapezoidal. The lower profile 5 is completely trapezoidal. All embodiments have 4 recesses 6 in the central profile. The six embodiments differ in length and in the type and number of recesses 6.

The first of the six exemplary embodiments is shown in FIG Figure 6 shown. This embodiment is shorter than all others in Figure 6 shown embodiments. It has three recesses 6 in the central profile 4, with two recesses 6 of a first type and one recess 6 of a second type. The recesses 6 of the first type are made longer in the horizontal direction than the recess 6 of the second type. The upper profile 3 begins at a distance 9 (98.5 mm) from a virtual zero line. The center of the single recess 6 of the second type, which, viewed from the left, represents the first recess 6, has a distance 10 (500 mm) from the zero line. From the center of this recess 6 of the second type there is a distance 11 (200 mm) to the center of the first recess 6 of the first type (middle recess). From this center there is a distance 13 (300 mm) to the center of the second recess 6 of the first type (right recess). The distance 12 is 1500 mm. The length of the heavy duty harrow 1 results from the distance 12 (1500 mm) minus twice the distance 9 (98.5 mm) and is 1303 mm.

The second of the six exemplary embodiments, which is the second from the top Figure 6 is, is made longer than the first embodiment. This exemplary embodiment has, in addition to the three cutouts 6, which are also present in the first exemplary embodiment, a further cutout 6 of the first type and a further cutout 6 of the second type. This results in an exemplary embodiment which has a recess 6 of the second type on each side, three recesses 6 of the first type being arranged between these recesses 6. The recess 6 of the second type, which is on the far right in Heavy duty harrow is arranged, has a distance 12 (1500 mm) from the center of this recess to the virtual zero line. A distance of 14 (200 mm) results from the center of this cutout arranged on the outside on the right to the center of the cutout of the first type present on the left. The distances between the other recesses 6 can be taken from the description of the first exemplary embodiment.

The third embodiment in Figure 6 (the third heavy duty harrow from above) is again made longer than the heavy duty harrow of the second exemplary embodiment. The approximate length of the third exemplary embodiment results from the sum of the distances 12 (1500 mm), 16 (500 mm) and 17 (500 mm). The central profile 4 of the exemplary embodiment has a total of seven cutouts 6. Three cutouts 6 - the two very outer (left and right) and the middle cutout 6 - are cutouts 6 of the second type. Two cutouts 6 of the first type are arranged between two cutouts 6 of the second type. The distance from the virtual zero line to the central recess 6, that is to say to the second recess 6 of the second type seen from the left, results in a distance 21 (1275 mm).

The fourth embodiment of the heavy duty harrow 1 (the fourth heavy duty harrow 1 from above) is again longer than the heavy duty harrow 1 of the third embodiment. The approximate length of the heavy duty harrow 1 results from the sum of the distances 12 (1500 mm), 16 (500 mm), 17 (500 mm) and 18 (500 mm). This heavy duty harrow 1 comprises the same number of cutouts 6 as the third exemplary embodiment, the middle cutout being further spaced from the other cutouts.

The heavy duty harrow 1 of the fifth exemplary embodiment is again made longer than the heavy duty harrow 1 of the fourth Embodiment. The approximate length of the heavy duty harrow 1 results from the sum of the distances 12 (1500 mm), 16 (500 mm), 17 (500 mm), 18 (500 mm) and 19 (500 mm). In comparison to the fourth exemplary embodiment, the fifth exemplary embodiment has a further central recess of the second type. This exemplary embodiment thus has two recesses 6 of the second type in the middle. Seen from the left, this results in a first recess 6 of the second type followed by a first recess 6 of the first type, a second recess 6 of the first type, a second recess 6 of the second type, a third recess 6 of the second type, a third recess 6 of the first type, a fourth recess 6 of the first type, followed by a fourth recess of the second type.

The sixth exemplary embodiment is, in turn, longer than the fifth exemplary embodiment, the approximate total length of the sixth exemplary embodiment being the sum of the distances 12 (1500 mm), 16 (500 mm), 17 (500 mm), 18 (500 mm), 19 (500 mm) and 20 (500 mm) results. This exemplary embodiment has a further, third recess of the second type in the middle of the heavy duty bolt. A distance 22 (500 mm) results from the virtual zero line to the center of the first recess 6 (recess of the second type) seen from the left. The distance 23 (200 mm) results from the center of this first recess 6, seen from the left, to the second recess 6, seen from the left (recess of the first type). There is a distance of 24 (300 mm) to the middle of the next recess (the second recess of the first type viewed from the left). There is a distance of 25 (500 mm) to the middle of the next recess (second recess of the second type). A distance 26 (500 mm) results from the center of the next recess 6 (third recess of the second type). To the middle of the next recess 6 (fourth recess of the second type) there is a distance 27 (500 mm). To In the middle of the next recess 6 (third recess of the first type) there is a distance 28 (500 mm). There is a distance of 29 (300 mm) to the middle of the next recess (fourth recess of the first type). There is a distance of 30 (200 mm) to the middle of the last recess (fifth recess of the second type).

Figure 7 shows a heavy duty harrow 1 according to the invention in engagement with two vertical posts 8. The heavy duty harrow 1 can be any embodiment according to FIGS Figures 1-6 act.

Claims (12)

1. Heavy-duty ledger (1) for use on a scaffolding, said ledger comprising an upper profile (3), a central profile (4) and a lower profile (5), the upper profile (3) being designed in such a way that fastening means (7) for fastening the heavy-duty ledger (1) are fastenable to the upper profile (3), the upper profile (3), the central profile (4) and the lower profile (5) being designed in one piece, characterized in that the central profile (4) has recesses (6) for the passage of scaffolding elements, the heavy-duty ledger (1) having at least one recess (6) of a first type with a first length in the direction of a longitudinal axis and a recess (6) of a second type with a second length in the direction of the longitudinal axis, the first length and the second length differing in size.
2. Heavy-duty ledger (1) according to claim 1, wherein the upper and lower profile (5) are each formed as a hollow profile, preferably as a round, square or U-profile.
3. Heavy-duty ledger (1) according to one of the preceding claims, wherein the upper profile (3) comprises a wedge head (7) for fastening the heavy-duty crossbar (1) to a perforated disc of a vertical shaft.
4. Heavy-duty ledger (1) according to one of the preceding claims, wherein the lower profile (5) or the center profile (4) and the lower profile (5) are trapezoidal in longitudinal section.
5. Heavy-duty ledger (1) according to one of the preceding claims, wherein the heavy duty bar (1) is made of light metal, in particular aluminum or an aluminum alloy, in particular by aluminum extrusion.
6. Heavy-duty ledger (1) according to one of the preceding claims, wherein the center profile (4) has in cross-section only one point of contact with the upper and/or lower profile (3, 5).
7. Scaffold comprising at least one heavy-duty ledger (1) according to one of the claims 1 to 6, a first vertical post (8) and a second vertical post (8), wherein the heavy-duty ledger (1) is attached vertically to the two vertical posts (8) .
8. Scaffold according to claim 7, wherein scaffold elements extend vertically through the recesses (6) of the heavy-duty ledger (1).
9. Method of manufacturing a heavy-duty ledger (1) according to any one of claims 1 to 8, wherein the heavy-duty ledger (1) is manufactured by extrusion.
10. Method for producing a heavy-duty ledger (1) according to claim 9, wherein in a further step recesses 6, in particular in the center profile, are recessed, in particular milled.
11. Method of manufacturing a scaffold, wherein a heavy-duty ledger (1) according to any one of claims 1 to 8 is mounted between two vertical posts (8).
12. Method according to claim 11, wherein the method further comprises the step of inserting a scaffolding element extending vertically to the heavy-duty ledger (1) into a recess (6) of the heavy-duty ledger (1).

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