Scaffolding tube and scaffold element

[0001] The invention relates to a building scaffold pipe, with axle which extends from the first axial end of the pipe to the opposite second axial end of the pipe, a receiving section provided at the first axial end of the pipe and a plug-in section provided at the second axial end of the pipe, which has a reduced cross-section relative to the receiving section and ends in a radial shoulder, which creates a plug-in section annular support surface, the inner diameter of the receiving section is greater than the outer diameter of the plug-in section, so that the adjacent scaffold tube can be inserted with an identical plug-in section into the receiving section. Furthermore, the invention also relates to a scaffolding element with such a scaffolding tube.

[0002] Building scaffoldings are made, for example, as work scaffoldings or as load-bearing scaffoldings. Scaffolding pipes are usually used in frame elements of building scaffolding, especially in working scaffoldings, and as a single pole in the construction of load-bearing scaffoldings or so-called transient frames. In frame scaffoldings, two parallel scaffold tubes are connected, in particular welded, to at least one transverse beam. The frame elements are then put on top of each other, which allows to realize extremely high scaffolding heights. Scaffold tubes are, however, also mounted as individual rods. The principle of such construction scaffolding is always the same. At one axial end of the scaffolding tube, it has a reduced cross-section, which forms the so-called plug-in section. At the opposite end of the receiving section, the plug section of the adjacent scaffold tube can then be inserted, or vice versa. The plug and receiving sections have radial clearance relative to each other to facilitate insertion. This radial clearance, however, is disadvantageous in terms of scaffolding stability, since the upper scaffold tube can easily tilt relative to the lower scaffold tube. In order to reduce the maximum tilt angle, it is known to provide the entire receiving section with axial longitudinal grooves formed by forming that are circumferentially spaced apart. This reduces radial clearance. This advantage, however, has the disadvantage that the mutual insertion of scaffolding pipes into each other is no longer so simple and the pipes when erecting and dismantling the scaffolding can easily hook or jam, especially when one tube of the scaffolding frame element is inserted clearly in front of the other tube of the scaffolding frame element . DE 966298C discloses all the technical features of the preamble of claim 1. The object of the invention is therefore to create a scaffold tube that allows simple and quick erection and dismantling of the scaffold with high scaffold stability.

[0003] This task is solved according to the invention by means of a scaffolding tube of the type mentioned at the outset according to claim 1. Compared to that in the prior art, the end face of the receiving section can be shifted so relative to the support surface of the radial shoulder that the contact surface is reduced, as a result pipes on the front side are heavier loaded, and therefore have a lower load capacity and are easier to deform plastically.

[0004] Thickening of the pipe wall at the first axial end of the pipe is done technologically preferably by upsetting the scaffolding pipe, which leads to the plastic expansion of the pipe wall in the radial direction.

Preferably, 1.2 * s <s for the maximum wall thickness smax at the first axial end of the pipe _max <2 * s, especially p_max ~ 1.5 * s, where s is a substantially constant wall thickness of the scaffold tube except for the thickening of the tube wall at the first axial end of the tube.

[0006] Particularly preferably, the outer diameter of the scaffold tube at the first axial end substantially corresponds to the outer diameter of the receiving section. This means, in other words, that the first radial end of the tube widens radially inward, while the radial outer side of the scaffold tube in the region of the first axial end of the tube essentially retains the shape of a cylinder, especially a cylindrical roller. The thickened wall of the pipe not only provides a large face in this way, but also ensures that the face of the face is as full as possible with the support surface of the inserted scaffolding pipe.

[0007] At the first axial end of the scaffolding tube, a thickening section is preferably provided, in which the tube wall thickens essentially wedge-shaped from a smaller wall thickness s to a maximum wall thickness smax. The thickening section may in particular have the axial dimension LA, with s <LA <5 * s, in particular LA & lt; 2.5 * s occurring, wherein s in turn means a substantially constant wall thickness of the scaffolding tube outside the wall thickening pipes at the first axial end of the pipe.

[0009] The above-mentioned task was also solved according to the invention by means of a scaffolding pipe, in which the receiving section at the first axial end of the pipe has exactly one broken in the circumferential direction or a circulating positioning groove that reduces the inner diameter d1, and the receiving path and defines the minimum diameter internal d1, i, min receiving segment.

[0010] The invention creates an excellent compromise between small radial clearance and easy insertion of adjacent scaffolding pipes. Due to the formation of the positioning groove, the receiving section at the first axial end of the pipe has a minimum outer diameter, which significantly reduces radial clearance compared to traditional, undeformed scaffolding pipes. The receiving section has, however, axially behind the positioning groove in the direction of the radial shoulder the inner diameter is again increased relative to the minimum inner diameter, so that the inserted scaffolding tube, after leaving the positioning groove area through the end of the plug section, can still be really tilted. Since the scaffold tubes inserted into each other at the beginning of the insertion process can be tilted very easily and really strongly relative to each other, the unwanted hooking or jamming of the scaffold tubes is largely excluded. However, the deeper the end of the plug section, i.e. the other axial end of the pipe, enters the receiving section, the greater the distance between the two resulting contact surfaces, namely on the one hand the contact surface between the end of the plug section and the inside of the receiving section, on the other hand the contact surface between the positioning groove and the adjacent area of ​​the plug-in section. As the axial distance between the contact surfaces increases, the maximum tilting angle, made possible by radial play at the end of the plug-in section, becomes smaller.

[0011] Since the radial positioning of the inserted scaffold tube occurs only through one positioning groove, radial clearance, i.e. the gap between the outer diameter of the plug-in section and the minimum inner diameter of the receiving section defined by the positioning groove, can be reduced compared to traditional building scaffoldings, without a significant increase in expenditure related to the assembly or disassembly of the scaffolding. Exactly one positioning groove allows, above all, a really strong tilting when inserting two scaffolding tubes, so that friendly assembly and disassembly of the scaffolding is also guaranteed with a small radial clearance. When the scaffolding pipes are assembled, the small radial clearance then has a positive effect on the stability and load-bearing capacity of the building scaffolding.

[0012] In an embodiment of the scaffolding tube, the male section has an axial female length from the second axial end of the tube to a radial shoulder, wherein the axial distance of the positioning groove from the first axial end of the tube is less than a third, especially less than one fifth, of the axial plug length.

[0013] Furthermore, the axial distance of the positioning groove from the first axial end of the pipe may also be smaller than the internal diameter of the receiving section. Due to the axial positioning of the positioning groove very close to the first axial end of the pipe at the beginning of the insertion process, it is possible to tilt the scaffolding pipes for easy assembly or disassembly. At the same time, the scaffolding tubes in the connected state, due to the proximity of the positioning groove and the first axial end of the tube, and thus the scaffolding tube mounting surface, are fixed relative to each other with a slight radial clearance. This fixation with a small play close to the mounting surface leads to high axial load-bearing capacity and stability of the scaffolding pipe connection.

In a further embodiment of the scaffolding tube, the receiving section has a circumferential or circumferential groove interrupted, the groove having a greater axial distance to the first axial end of the tube than the positioning groove and I define the inner diameter d1, i, N for which d1 occurs , i, min <d1, i, N <d1, i. This groove, additionally provided for the positioning groove, reduces the possible tilting angle of both scaffold tubes relative to each other at the end of the insertion process of the two scaffold tubes, specifically when the end of the plug section of one scaffold tube reaches the groove in the receiving section of the other scaffold tube. This increases the stability and load capacity of the mounted scaffolding, but it has almost no impact on the friendliness of the scaffolding assembly and disassembly, since the reduction of the tilting angle only manifests itself at the end of the insertion process and in the inserted state. It should be emphasized that the plug section of the inserted scaffold tube in the area of ​​the positioning groove has less radial clearance than in the optional, additionally provided groove.

In this case, the plug section of the scaffold tube has an axial plug length LE from the second axial end of the tube to the radial shoulder, with 0.5 * L being preferably for the axial distance xN of the groove from the first axial end of the tube x_e <x_N <L._E, especially x_N ~ 0.8 * L._E. As a result, the tilt angle is reduced only at the end of the insertion process, so that it has practically no effect on the installation-friendly scaffolding. In addition, the possibly large axial distance between the positioning groove and the additional groove is particularly advantageous in terms of reducing the tilt angle as much as possible.

[0016] In a further embodiment, the scaffold tube has an intermediate area between the receiving section and the plug section, in which the scaffold tube preferably has the same outer diameter d1 and the same shape as in the receiving section. This intermediate area is used to shape the length of the scaffold tube. While the receiving section has the same axial length as the plug-in section, the intermediate area allows the required axial length of the scaffolding tube to be achieved.

[0017] The intermediate area may have, in the vicinity of the radial shoulder, in particular a widening section in which the scaffolding tube widens radially in the direction of the radial shoulder. As a result, an increased support surface is formed at the radial shoulder of the scaffolding tube, which ensures that the end face at the first axial end of the tube of the scaffold tube being mounted always lifts completely.

[0018] In particular, the annular support surface of the scaffold tube may have an outer diameter d3, which is larger than the outer diameter d1, of the receiving section.

In a further embodiment of the scaffolding tube, the male section has a notch adjacent the radial shoulder in a circumferential direction, so that the annular support surface has an inner diameter d3, which is smaller than the outer diameter d2 of the male section.

[0020] The plug section preferably tapers towards the second axial end of the scaffold tube and forms an introducing cone. This introducing cone is, for example, created by the plastic deformation of the pipe and facilitates the insertion of the plug section into the receiving section of the next scaffolding pipe, because the insertion region of the plug section, namely the second axial end of the pipe, forms a kind of tip.

[0021] The wall thickness of the scaffold tube in a working scaffold is preferably maximum 3.2 mm, in particular about 2.7 mm. This represents a particularly small wall thickness for the scaffolding tube, which has a correspondingly favorable effect on its weight. The small wall thickness can be realized because the stability of the scaffolding tube or building scaffolding is ensured by the positioning groove and / or the thickened tube wall at the first axial end of the scaffolding tube. Due to the thinner wall thickness of the scaffold tube, the weight is reduced, which in turn simplifies the erection and dismantling of the scaffolding. The same also applies to load-bearing scaffolds, which until now have typical wall thicknesses of at least 3.2 mm. This wall thickness may in particular be reduced to about 2.9 mm or alternatively it may remain unchanged, which clearly increases the lift force of the scaffolding.

The invention furthermore comprises a scaffolding element which comprises at least one of the aforementioned scaffolding tube and a crossbeam fixed to the scaffolding tube, the crossbar being preferably positioned and attached perpendicular to the scaffolding tube in the receiving section or in the intermediate area of ​​the tube scaffolding. At least one load bearing transverse beam is preferably located on the receiving section or in the intermediate area, since it is the stabilizing area of ​​the scaffolding tube according to the invention. This type of scaffolding element can be, for example, an angular element that is used in scaffolding construction to widen the working surface, or a frame element.

[0023] In particular, the scaffolding element may comprise the two above-mentioned scaffolding pipes, which are connected to each other by at least one crossbeam to form the scaffolding frame element. The frame element shaped in this way is usually known as the H element or the T element and is used in the construction of scaffoldings in order to easily and effectively erect the side walls of the scaffolding.

[0024] Other features and advantages of the invention result from the following description of preferred embodiments and reference to the drawings. They present on them:

FIG. 1 a longitudinal section through two scaffolding pipes according to the invention inserted into each other according to a first embodiment;

- figure 2 a detailed section of figure 1 in the area of ​​the first axial end of the pipe;

- figure 3 a longitudinal section through two scaffolding tubes inserted according to the invention, according to a second embodiment;

- figure 4 a detailed section of figure 3 in the area of ​​the first axial end of the pipe;

- figure 5 a perspective view of a scaffolding element according to the invention with two scaffolding pipes according to the invention and

- figure 6 a perspective view of the scaffold tube according to the invention, here for modular scaffolding.

[0025] Figures 1 to 4 show scaffolding pipes 10 which can be shaped as rods or parts of a scaffolding element, e.g. Each scaffolding tube 10 has an A axis that extends from the first axial end 12 of the tube to the opposite second axial end 14 of the tube, the receiving section 14 provided at the first axial end 12 of the tube and the plug section 18 provided at the second axial end 14 of the pipe. external cross-section than the other sections of the scaffold tube 10.

[0026] The inner diameter d1 and the receiving section 6 is larger than the outer diameter d2 and the plug section 18, which allows the adjacent scaffold tube 10 to be inserted with the identical plug section 18 in the receiving section 16.

[0027] The intermediate area 20 connects the receiving section 16 with the plug-in section 18, the intermediate area 20 preferably passing without offsetting with the same geometry and the same dimensions into the receiving section 16.

The intermediate area 20 is connected in one piece to the plug-in section 18 through the radial shoulder 22. The radial shoulder 22 has a support surface 24 facing the plug-in section 18 that serves as a stop when inserting two scaffolding tubes 10.

[0029] The entire scaffold tube 10 is made in one piece from a metal tube, and the different sections are only formed by the plastic deformation of the scaffold tube 10.

[0030] According to figures 1 and 3, the receiving section 16 has, at the first axial end 12, exactly one pipe, broken in circumferential direction or a circulating positioning groove 26, which reduces the internal diameter d1, and the receiving section 16. Minimum internal diameter d1, i, min The receiving section 16 is defined here only by exactly one positioning groove 26.

[0031] This defined by the positioning groove 26, the minimum internal diameter d1, i, min of the receiving section 16 is only slightly larger than the external diameter d2, and the insertion section 18, whereby two scaffold pipes 10 plugged in with each other in the positioning groove area 26 in radial direction are connected approximately without clearance. This connection of the scaffold tubes 10 interconnected with each other with a small radial clearance leads to a high stability and load capacity of the scaffold.

[0032] Since the receiving section 16 has only one positioning groove 26, which defines the minimum internal diameter d1, and, min, at the beginning of the insertion process of the two scaffolding pipes 10 it is still possible to really tilt the scaffolding pipes 10, so despite the small radial clearance in the area of ​​the positioning groove 26 for easy assembly and disassembly of the scaffolding.

[0033] To enable the scaffolding tubes 10 to have a particularly large tilting angle at the beginning of the insertion process and to insert the scaffolding tubes 10 in the area of ​​the first axial end 12 of the tube to be secured relative to each other without radial play, it is advantageous if the positioning groove 26 is positioned as close as possible to the first axial end 12 of the pipe. However, the positioning groove 26 is spaced from the first axial end 12 of the pipe such that the radial outer diameter d1 and the receiving section 16 is no longer reduced by the positioning groove 26. The diameter of the annular face forming the face at the first axial end 12 of the pipe is therefore not reduced by the positioning groove 26, which has a positive effect on the stability and load capacity of the scaffolding.

[0034] The plug section 18 has from the second axial end 14 of the pipe for radial shoulder 22 an axial insert length LE, whereby it has proved particularly advantageous if the axial distance xP of the positioning groove 26 from the first axial end 12 of the pipe is smaller than one third, especially smaller than one fifth of the axial plug length LE. The insertion length LE is preferably in the range from about 150 mm to 250 mm.

[0035] With respect to the inner diameter d1, and the receiving section 16, it has proved particularly advantageous if the axial distance xP of the positioning groove 26 from the first axial end 12 of the pipe is smaller than the inner diameter d1, and the receiving section 16.

[0036] As shown in figures 1 and 3, the receiving section 16 has a further, circumferential or circumferential groove 28, the groove 28 having a greater distance xN from the first axial end 12 of the pipe than the positioning groove 26, and also defines the diameter internal d1, i, N, for which d1, i, min <d1, i, N <d1, i occurs. In other words, this means that the optional groove 28 has greater radial clearance relative to the plug-in section 18 of the inserted scaffold tube 10 than the positioning groove 26. The groove 28 only serves to reduce the tilting angle at the end of the insertion process and in the plugged-in state of the two scaffold tubes 10, which positively affects the stability and load capacity of the scaffolding, however, it has almost no adverse effect on the convenience of its assembly.

[0037] A particularly large reduction in the angle of inclination can be achieved when the groove 28 in the axial direction is positioned as far as possible from the positioning groove 26. In terms of the axial insertion length LE of the insertion section 18, it has proved particularly advantageous when for the axial distance xN of the groove 28 from the first the axial end 12 of the pipe overlaps

0.5 * L_e <x_N <L._e, especially x_N ~ 0.8 * L._E.

[0038] The plug section 18 has a tapered, free end.

The cross section of the plug section 18 is reduced to the extent that the outer diameter d2 and the plug section 18 is smaller than the inner diameter d1, i, min of the receiving section 16 in the area of ​​the positioning groove 26. This ensures that the plug section 18 of the first scaffold tube 10 can be inserted into the receiving section 16 of an identical second scaffold tube 10.

[0039] According to figures 1 and 3, the plug section 18 of the scaffolding tube 10 narrows towards the second axial end 14 of the tube and forms the insertion cone 30. The insertion cone 30 borders in the axial direction the insertion roller 32, which has a largely constant shaped cross-section cylindrical roller.

[0040] In embodiments of the scaffold tube 10 with such an introducing cone 30, it is important to ensure that the optional groove 28 in the two insertion state of the scaffold tubes 10 borders radially with the insertion roller 32 and not with the introducing cone 30 because otherwise otherwise the angle of heel through the groove 28 is not reduced.

[0041] In addition, the scaffolding tube 10 has an opening 33 in the plug-in section 18 (see Figures 1 and 3), which is provided for a locking pin, which, when the two scaffolding tubes 10 together, additionally secures the connection. The receiving section 16 has a corresponding opening 35 which is in line with the opening 33, so that the locking pin can be inserted through both holes 33, 35.

[0042] In particular, it can be clearly seen from the detailed section in Figures 2 and 4 that the wall 34 of the scaffolding tube 10 at the first axial end 12 of the tube has a maximum thickness smax, and in the remainder a substantially constant, smaller thickness s.

[0043] In the illustrated embodiments, the thickening of the pipe wall 34 at the first axial end 12 of the pipe has been achieved by upsetting the scaffolding pipe 10 radially inwards, so that the outer diameter d1 and the scaffolding pipes 10 at the first axial end 12 of the pipe substantially correspond to the outer diameter d1, and the receiving episode 16. Thus, in addition to the positioning groove 26 and the optionally provided groove 28, the receiving section 16 maintains a constant external cross-section having a substantially cylindrical circular cross-section.

[0044] According to figures 2 and 4, the scaffolding pipe 10 has a thickening section 36 at the first axial end 12 of the pipe, in which the wall 34 of the pipe thickens essentially wedge-shaped from a smaller thickness s to a maximum thickness smax, for the axial dimension LA of section 36 the thickening occurs s <LA <5 * s, especially LA «2 * s, where s is to a large extent constant (except for section 36 thickening) the wall thickness of the scaffolding tube 10.

[0045] With respect to this wall thickness scaffolding pipe 10 for the maximum wall thickness smax, 1.2 * s <s occurs at the first axial end 12 of the pipe _max<2 * s, especially p_max ~ 1.5 * p.

[0046] Figures 1 and 2 show the scaffolding pipes 10 according to the first embodiment in which the plug-in section 18 in the vicinity of the radial shoulder 22 has a circumferential notch 38, so that the annular support surface 24 has an internal diameter d3, and which is smaller than the outer diameter d2 and the plug-in section 18.

[0047] Figures 3 and 4, on the other hand, show scaffolding pipes 10 according to the second embodiment, which, however, are very similar to the first embodiment in structural and functional terms, so that only the differences are explained below.

[0048] In a manner deviating from the first embodiment, the scaffold tubes 10 according to figures 3 and 4 in the vicinity of the radial shoulder 22 do not have a circumferential cut-in 38, so that the inner diameter d3 and the support surface 24 approximately correspond to the outer diameter d2 and the section plug-in 18.

[0049] Instead, the annular support surface 24 of the scaffold tube 10 according to figures 3 and 4 in contrast to the first embodiment has an outer diameter d3, which is larger than the outer diameter d1, and the receiving section 16.

[0050] This is achieved so that the intermediate area 20 of the scaffold tube 10 has in the vicinity of the radial shoulder 22 a conical widening section 50 in which the scaffold tube 10 widens radially towards the radial shoulder 22.

[0051] With respect to the wall thickness s, 0.2 * s <r <s, in particular r 0,5 0.5 * s, takes place for the expansion r of the extension section 40. The radial widening of the intermediate area 20 ensures that, if the scaffolding pipes 10 are interconnected, the widened end face of the first radial end 12 of the pipe always always adheres to the support surface 24 with its entire surface. This largely prevents excessive surface pressure and uneven pressure distribution.

[0052] Scaffolding pipes 10 according to figures 1 to 4 can also be provided in the scaffolding elements. These scaffolding elements are, for example, frame elements (see figure 5) or angular elements which, in addition to the scaffolding tube 10, have a cross beam 42 or a differently shaped girder. These girders are welded to the scaffold pipe or pipes 10, in particular to their receiving section 16 or intermediate area 20.

[0053] In the embodiment of figure 5, two scaffold tubes having different lengths 10 are connected to each other by a welded cross beam 42 to form a scaffolding element. In this case, both scaffold tubes 10 have plug-in sections 18 lying on the same side and corresponding receiving sections 16 at their opposite ends. An intermediate tube can optionally be attached to the shorter scaffold tube 10.

Alternatively, the scaffold tube 10 can also be used for the angle element according to the invention.

[0055] Apart from the thickening section 36, the wall thickness s of the deformed scaffold tube 10 has a maximum scaffolding of 3.2 mm, in particular about 2.7 mm, which is less than the wall thickness of typical scaffold tubes. The scaffolding pipes 10 according to the invention are therefore lighter and have corresponding handling advantages.

[0056] Figure 5 shows the part of the working scaffold that is placed next to the building and on which workers walk.

[0057] Alternatively, the scaffold tube 10 may also be part of the modular scaffold as shown in figure 6. Figure 6 specifically shows the scaffold pipe 10, which is made as a support pipe and, for example, carries ceiling formwork. Also, this scaffolding tube 10 is made as previously described and illustrated on the basis of figures 1 to 4. Apart from the thickening section 36, the wall thickness s of such a pipe 10 for support scaffoldings is preferably, which is not to be construed as limiting, between 2.7 mm and 3.2 mm and is therefore smaller than the wall thickness of typical support scaffold tubes.

[0058] The optionally provided rosettes 44, attached to the scaffolding tube 10, serve to attach adjacent scaffolding parts.

List of references [0059] scaffolding pipes first axial pipe end second axial pipe end section plug-in section intermediate area shoulder support surface groove positioning groove groove introducing cone introducing roller hole wall pipe hole thickening section indentation thickening transverse beam rosette

Peri GmbH

Proxy:

84P41254PL00

EP 3 027 826 B1