EP1162329A1 - Stile to rung connection for scaffolding or similar elements - Google Patents

Abstract

The spar (2) which engages through a cross bore in the beam (1) to be secured against axial displacement has a substantially non-circular profile over its length and is only circular in the region (5) where the associated reinforcement tubes or safety hooks snap in. This circular profiled region is preferably about 2 to 15 cm in relation to an overall length of the spar of about 50 to 100 cm.

Description

The invention relates to a spar rung connection for scaffolding elements and the like according to the preamble of claim 1. Such scaffolding are usually used as mobile scaffolding or standing scaffolding and stand out characterized in that the rungs used for this also in the area of Appearance can be formed round. For rungs for ladders, this is in generally not desired, because it is prescribed that the Rung shape straight or only weak in the area of the tread should be arched.

For simplification reasons, the invention therefore describes sprouts as they do generally used for scaffolding, although the invention is not limited to this. The invention therefore claims any spar rung connection, regardless of which ascent aid this spar rung connection is arranged.

In a more specific application, for the sake of simple description Climbing aid described on a scaffolding, which essentially consists of a frame-shaped part, which consists of mutually parallel, essentially in vertical spars, between which in the rungs are arranged at regular intervals.

A spar-rung connection for work scaffolding is known, which has a round Rung shape used. The rung is therefore in its entire length essentially round profiled. It is also known that Attachment between the spar and the round profiled rungs in this way design that a cross hole is arranged in the spar and the rungs through inserted this cross hole and at least on the opposite side is provided with a flange. Would the rung with its round profile through an equally round cross hole in the spar inserted through, then an anti-rotation device would be missing. That is, the rung could rotate freely in the cross hole in the spar, which can be prevented should. It is known to provide an oval cross hole in the spar and that per se round profiled rung in the area of the passage through this cross hole deform that they also - but only in this area - one adapted oval cross section. This will make the required Protection against rotation of the rung in the spar recess guaranteed.

A round profiled rung shape is preferred because round profiled Rungs are suitable, corresponding strut tubes from work scaffolding to keep. The strut tubes with their mouth openings on the rungs be clicked on, place round-shaped rungs at these connection points ahead, and therefore it is known in the art to step over the rung to form the entire length with a round profile in order to support the strut tubes with their Snap-in openings on any length range of the rung with the rung can be detachably connected by latching.

The disadvantage of the known technology, however, is that a round-shaped rung is less resilient than comparatively an oval rung or a polygonal rung. A round profiled rung has the same Material expenditure a much lower moment of resistance against deflection due to load compared to oval or polygonal Rung.

Another disadvantage is that the deformation of the round profiled rung itself a double-ended oval rung is relatively difficult because the Oval deformation of the two ends of the rungs made very precisely must be in order to make a flush alignment with the assigned oval To ensure recess in the spar.

If there is no such adjustment, there is a game of Rung in this oval recess in the spar, for reduced resilience and a possible, slight twisting, which is an overall unsafe Appearance on such a rung caused.

The invention is therefore based on the object, a spar rung connection of the type mentioned in such a way that at same material use a much higher resilient rung created which ensures a significantly improved security against rotation in the spar.

To solve the problem, the invention is through the technical teaching of claim 1.

An essential feature of the invention is that the rung over its length seen essentially has a non-circular profile and that the rung only in the latching area of assigned strut tubes, Safety hook and the like is round profiled.

It is essential that the invention follows exactly the opposite path as that State of the art.

If it is proposed according to the invention that the rung over its length seen an out-of-round profile, then it is ensured that this Profile (using the same material as a round-shaped rung) has a significantly higher moment of resistance to deflection.

Another advantage is that due to the use of this non-circular profile now inherently a non-circular profile shape in a correspondingly adapted Cross hole (push-through opening) is inserted through the spar, which provides excellent protection against rotation. So there is no need more correspondingly more complex deformations of a rung in the area of their both ends for the purpose of pushing through a suitably adapted oval Push-through opening, because the push-through opening in the spar is now exactly the non-circular Rung shape can be adjusted from the house without the rung in this area must be deformed arbitrarily.

The deformation known in the prior art has the disadvantage that the structure of the rung in the deformation area is adversely affected, which makes the rung particularly resilient in this highly stressed area is reduced. This avoids the invention by making the invention a higher one resilient, non-round rung proposes that in a correspondingly adapted, non-circular push-through opening is inserted in the spar without the Rung must be deformed in this critical area.

It is only provided in a first preferred embodiment that in Latching area, i.e. in the connection area of strut tubes with the help of the jaw opening at least partially closing safety hook on the Rung can be unclipped, the rung is round profiled. Here there is Various options according to the invention, only a round-shaped rung to be provided in this isolated area.

The length of such an area is for example only 2 to 15 cm to a total length of a rung of about 50 to 100 cm.

This has the advantage that in the highly stressed areas, namely in Area of the push-through opening in the spar and also in the middle area of the rung, the rung remains undeformed and therefore very high Has moment of resistance to deflection. The material is also straight not affected by deformation in these highly stressed areas.

Only in short areas to the left and right of the push-through opening the material of the rung according to the invention to a relatively short length with a round profile or - more generally speaking - in its profile form Adjusted jaw opening of a strut tube.

It follows from this that in the latching area of such strut tubes The rung does not have to be profiled round, but only in their profile shape of the - possibly out of round - mouth opening of the Bracing tube can be adjusted.

A round profile is preferred because then a strut tube with its mouth, which is generally round-profiled, points from all directions Rung can be clicked on. However, this is not in the spirit of the invention necessary for the solution, because there are use cases where the Bracing tube, for example, only clipped onto the rung from above at an angle and only in this area must the mouth of the Strut tube the rung as positively as possible and without play reach around, and accordingly the rung only needs to be in this area be adapted to the mouth opening. Then there is absolutely no need for a round profile Shape of the rung in the latching area, but in general spoken a matched to the mouth opening of the strut tube Profiling.

In a development of the invention it is provided that the push-through opening to make the spar-rung connection not only to make it Connection serves, but that in the area of this cross-connection still more Fasteners can be arranged. Such a fastener is for example, an insertion sleeve that protrudes from the face of the spar and which is suitable to engage in an opposite spar profile, so that so that several spars can be put together.

If in the following description the term "non-circular profile" for the Rung cross-section is used, so any - except a round profile of a rung understood. However, are preferred especially oval profiles because they are particularly easy to manufacture. It however, all other profile shapes are also possible, e.g. Triangular profiles, square profiles, rectangular profiles and also profiles that pass through molded ribs, side channels or bulges with a non-circular profile can be converted into a - preferably - round profile in the latching area. In particular, profiles with a high section modulus are used Deformation preferred when exposed to load from above. This also closes Profiles that have different profile shapes over their length.

For the sake of simplicity, the following description of the drawing only shows the transformation of a non-round rung profile into a round rung profile in the Locking area of strut tubes described, although the invention is not limited to this, as was explained above.

The subject of the present invention does not otherwise arise only from the subject of the individual claims, but also from the Combination of the individual claims.

All disclosed in the file, including the summary Information and features, especially those shown in the drawings spatial education are claimed as essential to the invention, insofar as they individually or in combination are new compared to the prior art.

In the following the invention is based on several ways of execution illustrative drawings explained in more detail. Here go from the drawings and its description further features and advantages of the invention Invention.

Show it:

Figure 1:

Side view of a spar-rung connection with illustration different profile cross sections in the longitudinal area of the rung,

Figure 2:

the front view of the spar rung connection,

Figure 3:

the section along the line III-III in Figure 1,

Figure 4:

an embodiment modified from FIG. 1,

Figure 5:

the front view of Figure 4,

Figure 6:

the top view of another embodiment of a rung with ribs formed on the side,

Figure 7:

6 shows the side view of the rung according to FIG. 6 rotated by 90 °,

Figure 8:

Section through the rung of Figures 7 and 6 according to the Line VIII-VIII,

Figure 9:

the representation of a spar rung connection using the rung according to FIGS. 6 to 8,

Figure 10:

the position rotated by 90 ° according to FIG. 9,

Figure 11:

a third embodiment of a rung profile in undeformed Status,

Figure 12:

the representation of the deformed profile of the rung according to Figure 11,

Figure 13:

an undeformed rung according to a fifth embodiment,

Figure 14:

the representation of the deformed rung profile according to Figure 13 in Latching area,

Figure 15:

a sixth embodiment of a rung in the undeformed Status,

Figure 16:

15 in the round-shaped state in the latching area,

Figure 17:

a seventh embodiment of a rung in the undeformed Status,

Figure 18:

schematized the representation of the round profiled cross section a rung with the latching of strut tubes a rung according to Figure 8,

Figure 19:

the same representation as Figure 18 with a rung that in The latching area has a round profile.

1 and 2 generally show a spar rung connection, in which a spar 1 has a transverse recess 3 (also as Designated through-hole), which is approximately oval profiled and accordingly, the oval profile 6 of the rung 2 is adapted.

The rung 2 is essentially an oval profile over its entire length trained and therefore has the highest moment of resistance Deflection on.

To secure against axial displacement in the recess 3, the Rung on the inside of the spar on a flange 11, which also is formed opposite on the inside of the spar so that the Rung 2 both on the inside of the spar on both sides Corresponding flange edges 11 is provided and on the outside on the front side Beaded edge 4 carries.

Of course, all known security measures of the Rung 2 in the recess 3 of the spar 1 against axial displacement claimed. The arrangement of the flanged edges 11 is therefore only an example explained because other security measures against axial displacement can be used.

It is important that the profile of the rung is only in a relatively short area 5 2 is formed by deformation as a round profile 7 to 5 in this area Latching of corresponding jaw openings of strut tubes 31 (see Figures 18, 19) to ensure.

In the remaining areas, however, the rung 2 is an undeformed oval profile 6 formed, as is also shown by the drawn profile cross sections in Figure 1 is recognizable.

Figures 4 and 5 show that the rung 2 also to secure other parts on the spar 1 can be used. Here is an example Insert sleeve 10 shown, which is inserted into the inner profile of the spar and which also has an identically profiled recess 3, so that the Rung 2 with its push-through end both through the recess 3 in the spar and also form-fitting through the recess in the insertion sleeve 10 passes through and secured on both sides of the spar 1 against displacement is.

The profile shape of the spar is not important. Anyone can do the spar have any profile shape, the preferred embodiment being the Holm is round profiled.

A further connection technique is shown in FIGS. 6 to 10 a rung 12 starts, which rung in connection with laterally molded Ribs 15 describes the shape of a round profile.

A circular arc 16 applied externally to the profile of the rung 12 (see FIG. 8) would result in a precisely round profiled rung profile 12. This profile is also referred to below as a round profile 18.

However, if you remove the ribs 15, there is an oval profile, which in the essentially by an upper arch 13, a lower arch 13 and the parallel straight lines 14 connecting the two arches are described.

So it is essentially an oval profile 17, which only through laterally formed ribs 15 results in a round profile 18.

It is important in the embodiment according to FIGS. 6 to 10 that Area of the push-through opening of the rung 12 through the spar 1, the ribs 15 removed, so that there is the oval profile 17, which thus by the Recess 3 passes through in an oval shape, the recess 3 of this Oval shape is adjusted accordingly.

In the remaining areas, however, there is essentially a round profile 18, see above so that the rung has a round profile 18 over its entire length and it it is therefore possible according to FIG. 18 to use a strut tube 31 with one arranged securing hooks 32 over the entire length of the rung Unclip the rung because the entire area of the rung has a round profile is trained.

As explained earlier, this round profile is only by the side molded ribs 15 reached. It follows that the Section 12 resistance moment against deflection thanks to the oval profile shape 17 is very high and nevertheless a round profile 18 is formed by molded ribs 15 is achieved.

FIGS. 6 and 7 also show that the ribs 15 in the region of the Dividing lines 19 are cut off so that there is a smooth outer circumference Rung results, which is formed in the push-through area 25 without ribs 15, so that this push-through region 25, which is now of oval design, can be easily formed positively into the likewise oval-shaped recess 3 in the spar 1 inserted and securely caulked or crimped there.

The compression of the rung 12 in the area of the recess 3 shows otherwise also FIG. 9, where it can be seen that there are also flanged edges 11 of this type are placed on the inside and outside of the spar, so as to create a compression and thus an axial securing of the rung 12 in the spar 1 guarantee.

The advantage of the exemplary embodiment described above is that the rung 12 must not be deformed at any point, but only mechanically Ribs 15 in the push-through area 25 of the rung 12 removed.

Figures 11 to 16 show modified embodiments, but require the rung to deform.

The rung 20 in FIGS. 11 and 12 is initially an oval profile assumed that also carries ribs 23 formed on the side. This Rung profile 22 is oval in any case according to FIG. 11 and is also designed as an oval profile 21 if you have a Envelope surface, which surrounds the rung 20 and which also the side integrally formed ribs 23 encloses.

According to the invention, such a rung 20 is corresponding in the latching area the drawn arrow directions 24 deformed in a round profile, wherein in Locking area the ribs 23 are removed.

This means that the rung 20 has an oval profile over its entire length 21, 22 and the ribs 23 are only removed in the latching area and so that the oval profile 21, 22 was mechanically formed into a round profile 22 '.

Of course, this principle does not only work with two opposite molded ribs 15.23, but there may also be more than two ribs be present or even a single rib that - an asymmetrical profile provided - then removed in certain areas so that in results in a round profile in this area.

FIGS. 13 to 16 show a similar principle Rung profile 26 is designed as a square or rectangular profile and is only deformed with a round profile in the latching area, so that this is only isolated round profiled rung profile 26 results.

The same applies to the rung profile 27 according to FIG. 15, which essentially is triangular in shape and which is deformed only in the Locking area in the arrow directions 24 into a round rung profile 27 ' is reshaped.

The figure also shows a similar principle to that shown in FIGS. 11 and 12 17. The rung profile 28 shown there is inherently oval and the oval shape is further reinforced by ribs 29 formed on the top and bottom.

In the push-through area - in the area of the recess 3 - these ribs 29 be retained and an additional anti-rotation protection of the rung profile Ensure in the area of the transverse recess 3.

Only in the latching area (area 5) the ribs 29 are removed and that entire profile is isolated in this area in the arrow directions 24 by Deformation formed with a round profile.

Figures 18 and 19 then show that essentially a round profile Rung shape in the latching area is desired, although the invention - cf. the general description section - is not limited to this. The round profiling can also be achieved according to FIG. 18 by ribs formed on the side or by a round profiled rung profile, which shows the figures 19.

Drawing legend

1

Spar

2nd

rung

3rd

Recess

4th

Flanged edge

5

Area

6

Oval profile

7

Round profile

8th

Oval arch

9

Just

10th

Insert sleeve

11

Flanged edge

12th

rung

13

Round arch

14

Just

15

rib

16

Circular arc

17th

Oval profile

18th

Round profile

19th

parting line

20th

rung

21

Oval profile

22

Rung profile

23

rib

24th

Arrow direction

25th

Push-through area

26

Rung profile 26 '

27

Rung profile 27 '

28

Rung profile

29

rib

30th

parting line

31

Strut tube

32

Safety hook

Claims (7)

Spar-rung connection for scaffold elements and the like with a rung that passes through a cross hole in the spar with an unround profile cross section and is secured there against axial displacement and against rotation, characterized in that the rung (2, 12, 20) is seen over its length in essentially has a non-circular profile and that the rung is only round-profiled in the latching area (area 5) of associated strut tubes (31), securing hooks and the like or adapted to the mouth opening of a strut tube. Spar-rung connection according to claim 1, characterized in that the rung (2, 12, 20) is undeformed by the spar (1) at least in the region of the recess (3). Spar-rung connection according to claim 1 or 2, characterized in that the length of the round-profiled area (5) is about 2 to 15 cm based on a total length of a rung of about 50 to 100 cm. Spar-rung connection according to one of claims 1 to 3, characterized in that the round-profiled region (5) of the rung (2, 12, 20) is from the side edge of the spar (1). Spar-rung connection according to one of claims 1 to 4, characterized in that instead of a round-profiled area (5), a partially round area and / or the mouth opening of the strut tube (31) or securing hook (32) is adapted to the area (5). Spar rung connection according to one of claims 1 to 5, characterized in that
the rung (12) in connection with laterally formed ribs (15) describes a round profile (18), and that the ribs (15) in the push-through area (25) of the rung are removed, and the rung forms an oval profile (17) in this area . Spar-rung connection according to one of claims 1 to 5, characterized in that the rung (20) forms an oval profile over substantially the entire length, which has ribs (23) formed on the side, and that the rung (20) in the latching area (5 ) is deformed with a round profile.

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