EP0071617A1

EP0071617A1 - Steel tube scaffolding

Info

Publication number: EP0071617A1
Application number: EP19820900362
Authority: EP
Inventors: Udo Rose
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-02-02
Filing date: 1982-01-29
Publication date: 1983-02-16
Also published as: DE3103470C2; WO1982002733A1; DE3103470A1

Abstract

Des echaffaudages en tubes d'acier presentent des montants (1) s'emboitant les uns dans les autres, munis de brides d'accouplement saillantes radialement auxquelles des barres (2) horizontales ou diagonales peuvent etre fixees. Les barres (2) possedent des griffes d'accouplement (13, 14) verrouillables sur les brides d'accouplement (3). Afin que la barre (2) et les montants (1) soient relies par les brides d'accouplement (13, 14) s'y accrochant et que le flux de forces des barres (2) se produise au point de contact des montants (1), les brides d'accouplement (3) sont agencees a chaque extremite des montants (1) se recouvrant par paire lorsque les montants (1) sont emboites. Les griffes d'accouplement (1) destinees a recevoir les deux pieces d'une paire de bride d'accouplement de montants voisins (1) sont serrees l'une contre l'autre sur ces brides.Scaffolding made of steel tubes has uprights (1) which fit into one another, provided with radially projecting coupling flanges to which horizontal or diagonal bars (2) can be fixed. The bars (2) have coupling claws (13, 14) lockable on the coupling flanges (3). So that the bar (2) and the uprights (1) are connected by the coupling flanges (13, 14) hanging thereon and that the force flow of the bars (2) occurs at the point of contact of the uprights ( 1), the coupling flanges (3) are arranged at each end of the uprights (1) overlapping in pairs when the uprights (1) are fitted. The coupling claws (1) intended to receive the two parts of a pair of coupling clamp flanges (1) are tight against each other on these flanges.

Description

STEEL TUBE SCAFFOLDING

TECHNICAL AREA

The invention relates to a tubular steel frame with supports and / or support elements that can be built on one another.

Such a tubular steel frame has radially protruding coupling flanges on its supports or support elements and bolts to be fastened horizontally or diagonally to the supports or support elements, which have coupling claws at their ends which can be locked on the coupling flanges.

STATE OF THE ART

A tubular steel frame of the aforementioned type is known from German specification 28 42 944. There are individual coupling flanges on the supports or support elements, from the ends of which they are arranged at a distance. The claws to be fastened to the supports each grip a coupling flange with their claws, but several coupling claws and a corresponding number of claws can also be attached to one of the coupling flanges.

In the known tubular steel scaffolding, further connecting elements must be provided for connecting the supports or support elements which stand on one another. For this reason alone, the coupling flanges for fastening the transoms are at a distance from the butt joints of the supports. This is disadvantageous with regard to the introduction of force into the supports via the bolts. Radial forces must then be transmitted via the joints of adjacent supports, which, if the supports are not positively interlocked, can, for example, cause the adjacent support ends to shift relative to one another. If the ends of the supports are adequately radially secured against one another, there is a special risk of kinking in the area of the joint between two supports, which is due to the force application points of the bolts moved away from the joints of the supports.

THE INVENTION

Starting from a tubular steel frame of the type described above, the invention is based on the object of improving such a tubular steel frame by making the coupling flanges as close as possible to the abutment points of two supports or support elements which are built adjacent to one another lie and can also be connected to each other on the coupling flanges and the adjoining coupling claws of the bolt, the supports or support elements built on each other.

This object is achieved in a tubular steel frame of the generic type in that the coupling flanges are each arranged at the ends of the supports or support elements, the coupling flanges of adjacent supports or

Support elements are congruent in pairs and the coupling claws are designed to accommodate both paired coupling flanges and these can be braced against each other by the coupling claws which can be locked on the bolts.

The particular advantage of a tubular steel scaffold according to the invention is, on the one hand, that the force from the horizontally and daigonally arranged bars is applied directly to the abutment parts of two adjacent supports, i.e. at the point where the risk of kinking of the supports or support elements built on one another is greatest is. The further significant advantage of a tubular steel frame according to the invention is that additional coupling elements for connecting the supports built one on top of the other can be dispensed with. In this respect, the coupling flanges fulfill a double function in a tubular steel frame according to the invention, because they also serve to fasten the horizon tal and diagonal transom as well as for coupling ^* the neighboring supports or support elements to each other. This also simplifies the assembly of such a tubular steel scaffold, because by attaching the bolts, the vertical supports adjacent to each other at the abutment points are also coupled to one another via their coupling claws.

The supports or support elements can stand directly on one another with their end faces, the two paired coupling flanges then being arranged at a distance from one another so that sufficient tensioning can take place.

The coupling flanges can also be arranged at a distance from the end faces of the supports or support elements, in which case a centering sleeve projecting axially over the respective support end face is then inserted into the supports at each end.

In an advantageous further development, the one of the coupling flanges on the supports at the end of a centering sleeve projecting axially from the respective support end face and from the outside onto the support end and the other coupling flange from the other support end face essentially offset axially inwards by the projection of the centering sleeve on the former support end face be arranged on the support.

In an advantageous embodiment, the coupling flanges of the supports are disc-shaped and therefore have at the edge of the disc an axially projecting collar away from the end of the support, to which the The mouth of the coupling claws is adapted to the bolts.

The coupling claws locked on the coupling flanges are advantageously aligned radially to the supports.

In a further advantageous embodiment of the invention, two coupling claws, at least one of which can be moved and locked relative to the other, are designed and arranged as pliers at the ends of the bolts. The coupling claw at the top can be fixed, while the coupling claw at the bottom is mounted between two spaced-apart jaws, a wedge pressing the claw at the bottom into its locking position can be inserted into the slot between the jaws.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

The invention is based on the drawing

Embodiments explained in more detail. Show:

Figure 1 in side view of the connection point of two vertical supports to be connected and one that can be coupled thereto

Horizontal bar of a tubular steel frame, FIG. 2 shows a side view of the connection point corresponding to FIG. 1 with the vertical supports connected and the horizontal bar coupled thereto,

3 shows the top view of the horizontal bar coupled to the connection point of the vertical supports according to FIG. 2, FIG.

FIG. 4 shows a side view of the connection point of two vertical supports to be connected and a horizontal bar that can be coupled to it, of a further embodiment of a tubular steel frame,

5 shows the side view of the connection point according to FIG. 4 with the vertical supports connected and the horizontal bar coupled thereto, FIG.

FIG. 6 shows a side view of the connection point between two connected vertical supports and a horizontal bar of another embodiment of a tubular steel frame coupled thereto,

7 shows a side view of the end of the uncoupled horizontal bar corresponding to the horizontal bar at the connection point according to FIGS. 6 and

8 shows a horizontal section through a

Vertical support of a tubular steel frame with a top view of a connection place two supports with horizontal longitudinal and crossbars coupled to them, as well as a diagonal bar coupled to them.

BEST WAY TO CARRY OUT THE INVENTION

In Fig. 1 you can see two supports 1 of a tubular steel frame, which are to be built directly one above the other and are accordingly adjacent. For the sake of simplicity, only the lower end 4 of the upper support 1 and the upper end of the lower support 1 are shown. A horizontally or diagonally extending bolt 2 can be coupled in the area of the connection point between the two supports 1.

To connect the supports 1 to one another and to couple the bolt 2, the supports 1 have radially protruding coupling flanges 3 at their ends. The coupling flanges 3, as shown in FIG. 1, can be placed directly on the steel tubes forming the supports 1 and welded to them his. The steel tubes forming the supports 1 are cylindrical and the coupling flanges 3 are advantageously disc-shaped, wherein they have a central hole via which they are pushed onto the ends of the supports 1.

Both the coupling flange 3 arranged at the lower end 4 of the supports 1 and the one at the upper End 5 of the supports 1 each coupling flange 3 are arranged somewhat recessed from the lower end face 6 or the upper end face 7 of the supports 1. The offset of the flanges 3 away from the end faces β, 7 of the supports 1 can be very slight, for example less than 1 mm. This ensures that, in an assembled arrangement, the underside end faces 6 and the top end faces 7 of the supports 1 each lie directly on top of each other and over the

Columns 1 to be transmitted vertical forces are only transmitted via this joint. The coupling flanges 3 on the supports 1 should be relieved of such forces.

The supports 1 are centered at their abutment in the exemplary embodiment according to FIG. 1 by an end 5 of the supports 1 located at the top. used centering sleeve 9. The centering sleeve 9 projects axially over the upper end face 7 of the support 1 and thus also over the associated coupling flange 3.

Furthermore, an axially projecting collar 8 can be seen in FIG. 1 at the edge of the disk-shaped coupling flanges 3, which collar is directed away from the abutment of the supports 1. The collar 8 serves as a form-locking element, by means of which the coupling elements, described in more detail below, engage the bolts 2. It is therefore expedient to have a maximum possible distance from the outside of the respective support 1. As can also be seen in FIG. 1, the bolt 2 has pliers 10 at its end, which are formed from an upper, fixed claw 13 and from a lower, movable claw 14. In the installed position of bolt 2, these two are

Claws 13 and 14 of the pliers 10 one above the other. The mobility of the lower claw 14 results from mounting on a pivot axis 15. The upper claw 13 has a mouth 16 on its underside, which is largely adapted to the circumferential contour of the collar 8 on the coupling flanges 3 of the supports 1. In the same way, the movable claw 14 has a mouth 17 which is also adapted to the collar 8 of the flanges 3 and which is arranged on the side of the claw 14 adjacent to the upper claw 13.

The two claws 13 and 14 lie between two fixed jaws 11 of the pliers 10 at the end of the bolt 2. Between them, the pliers jaws 11 enclose a slot 12, which can be seen in FIG. 3, among other things. The jaws 11 are connected to one another via a fixed back 19, which results in a fixed U-shaped structure into which the claws 13 and 14 of the pliers 10 are inserted at the front. The pivot axis of the movable claw 14 can be formed by a bearing pin bridging the slot 12 between the two jaws 11.

In the space formed by the slot 12 between the claws 13 and 14 and the back 19 of the pliers 10, a wedge 18 can be used, which is shown in Fig. 1 in the half-inserted position and in Fig. 2 in the fully inserted position. The wedge 18 has a straight back part 26 and a front side 20 inclined at a wedge angle, the tapering of the wedge resulting downwards. On the top, the wedge 18 has a pronounced head 27, by means of which it can be driven into the free space of the slot 12 of the pliers 10. The width of the wedge 18 is slightly less than the width of the pliers slot 12.

In the interior of the pliers slot 12, the wedge 18 engages with the movable claw 14 of the pliers 10. As can be seen in FIG. 1, the movable claw 14 is mounted on the pivot axis 15 outside of its center of gravity in such a way that it is in the coupling position of the respective bolt 2 , in which it lies under the fixed claw 13 of the pliers 10, can swing down to open the pliers 10. At the same time, the back 21 of the movable claw 14 enters the area of the slot 12 between the jaws 11 of the pliers 10, which serves to receive the wedge 18. When inserted into the slot 12 of the pliers 10, the wedge 18 grips the back 21 of the movable claw 14 and presses it up with its front end to close the pliers 10. As a result, the pivotable claw 14 of the pliers 10 reaches its

Locked position, which can be seen in Fig. 2, in this position, the wedge 18 is supported with its front 20 on the parallel back 21 of the claw 14 on the one hand and on the other hand with its back 26 on the lying between the jaws 11 of the pliers 10 Back 19 off. The further the wedge 18 is driven into the wedge-shaped space between the back 21 of the movable claw 14 and the back 19 between the jaws 11 of the pliers 10, the claws 13 and 14 of the pliers 10 close all the more. In the inserted end position, the wedge 18 projects beyond the jaws 11 and the lower claw 14 of the pliers 10 on the underside, and can therefore be easily struck by hammering on its lower end face to open the pliers 10 can be expelled again.

2 shows in detail the connected arrangement of two supports 1 built one on top of the other and the bolt 2 coupled to the connection point of the supports 1. Of course, several such bolts 2 can also be fastened to a single connection point between two supports 1 lying one above the other. The two adjacent flanges 3 at the respective ends 4, 5 of the supports 1 are mirror images of one another at the abutment, the two collars 8 of the two flanges 3 facing away from one another. The adjacent flanges. 3 are at a short distance from one another, so that vertical forces of the supports 1 are not transmitted through them. The radial centering of the two supports 1 takes over the inner centering sleeve 9, which also ensures that the two adjacent flanges 3 on the

Columns 1 are congruent in the assembled arrangement one above the other.

The pliers 10 at the end of the respective bolt 2 is designed so that in the locked position

Claws 13 and 14 whose mouths enclose a space whose contour corresponds to the circumferential contour of the two adjacent flanges 3 of the supports 1 in the region of the collar 8 as seen in vertical section. The in the locked position over the two collars 8 of the adjacent flanges 3 gripping pliers 10 of the bolt 2 thus ensures a positive coupling of the bolt 2 to the two adjacent supports 1, so that forces acting in each direction from the bolts 2 in the area of the joint can be introduced into the supports 1 via the flanges 3.

The pliers 10 of the respective bolts 2 further clamp the two adjacent flanges. 3 of the supports 1 against each other. As a result, the supports 1 are firmly connected to one another, even tensile forces can be transmitted from one support 1 to the other. Already a single bolt 2 ensures with an end pliers 10 for the connection of the supports 1 via the flanges 3, the greater the number of locking pliers 10 acting on the flanges 3, the more secure the connection of the supports 1 in the vertical direction. The flanges 3 and the pliers 10 on the bars 2 can be designed such that the bars 2 can be attached to the adjacent flanges 3 at any angle in the area of the joint of the two supports 1. The pliers 10 are preferably arranged on the bolts 2 in such a way that they assume a radial position in relation to the supports 1 in a coupling arrangement. It is then particularly easy to connect over the entire circumferential angle of 360 ° bar 2 at the joint between the two supports 1.

The assembly of the scaffold is also particularly easy thanks to the scaffold node. The plugging together, which prepares two supports 1 lying one above the other no difficulties anyway, after that the bolts 2 are placed with the upper fixed claw 13 on the flange 3 at the junction of the supports 1 with the pliers 10 open. For static reasons, the upper one

Claw 13 be wider than the lower, movable claw 14 of the tongs 10 on the bolts 2. The latches 2 are secured to the supports 1 by inserting the wedge 18 into the slot 12 between the jaw tongs 11. As a result, the front end of the lower, movable claw 14 of the tongs 10 is raised and comes into engagement with the respective one flange 3 located at the bottom on the relevant support 1. By further driving in the wedge 18, the pliers 10 closes to the extent that the two coupling flanges are moved over the two mutually movable claws 13 and 14. 3 of the adjacent supports 1 are braced against each other in the axial direction. By securing the wedge 18 in the driven position, the overall connection between the two supports 1 and the bolt 2 is secured.

Basically, the coupling device of the bolt 2 can also be designed so that only the upper claw 13 is present, which, as in the embodiment shown, can be carried out directly on the flange 3 of the other support 1 above the wedge 18, provided that this is at an angle from can be driven up to below the flange 3 below. Just as easily as the connection between the supports 1 and the bars 2 can be made, it can also be released again after the wedge 18 has been driven out, since the pliers 10 then largely open automatically by the lower movable claw 14 falling off.

FIGS. 3 and 5 show another embodiment of the connecting node for a tubular steel frame, which essentially corresponds to that of FIGS. 1 and 2 in structure and fully in function. The only difference from the previously described embodiment is that the two vertical supports 1 are aligned coaxially with one another via an external centering sleeve 22. This centering sleeve 22 is pushed onto the lower end 4 of the supports 1 and carries the coupling flange 3 at its open front end. The sleeve 22 projects in the axial direction over the end face 6 of the support 1. By the amount of this protrusion, the coupling flange 3 is at the other end of the support from the end face 7 there

Support 1 offset inwards. At the upper end 5 of the support 1 shown in FIGS. 4 and 5 below it can be seen that, for example, the flanges 3 can be arranged on a tubular sleeve 23 which is then welded to the tube of the supports 1. The embodiment of FIGS. 4 and 5 has the advantage that the inner passage between the two supports 1 is not disturbed by projections. This is advantageous if, for example, threaded rods pass through the supports 1 on the inside.

6 and 7 show a further embodiment of the connecting node of a tubular steel frame, which basically corresponds to the prescribed designs with regard to its function and structure. Only here is another one Actuation for the movable claw of the pliers 10 at the end, the latch 2 is provided. The locking of the movable claw 14 of the pliers 10 is namely effected here by a cam 25 acting in the axial direction, which is part of a rotary element 24. This rotary element 24 is advantageously designed as an actuating nut which can be actuated with a key and which is mounted on the fixed upper claw 13. The movable claw 14 has a shoulder 28 on the rear here, which is connected to the front. Contour of curve 25 is engaged. The slope of this contour and thus the curve 25 merely represents a wedge surface which is transmitted to the end face of a hollow cylinder and which fulfills the function of the wedge surface 20 of the wedge 18 of the above-described exemplary embodiments. If the curve 25 of the rotary element 24 is out of engagement with the pivotable claw 14, it falls down under the action of gravity and thereby opens the pliers 10. This is shown in FIG. 7, while FIG. 6 shows the locking of the movable claw 14.

In principle, an external centering sleeve 22 can also be provided between the supports 1 in the exemplary embodiment according to FIG. 6, as was explained on the basis of the exemplary embodiment according to FIG. 4. So that even with an external centering sleeve 22, the force of the bolt 2 is carried out exactly in the area of the joint between the two supports directly on the flanges 3, the protrusion of the sleeve 22 over the respective end face 6 of the respective support 1 is chosen so large that the end face 30 of the sleeve 22 abuts the end face 29 of the sleeve 23, which each opposite coupling flange 3 carries on the adjacent support 1. The two mutually opposite, inner end faces 6 and 7 of the two supports 1 are at least a slight distance apart. Thus, with the centering sleeve 22 on the outside, the load is not transmitted via the end faces 6 and 7 of the supports 1, but via the sleeves 22 and 23 placed on the outside.

Claims

PATENT CLAIMS

1. Steel frame with supports and / or support elements that can be assembled one on top of the other, which have radially projecting coupling flanges and with bars to be fastened horizontally and / or diagonally to the supports or support elements, which have coupling claws at their ends, which can be locked on the coupling flanges, characterized in that that the coupling flanges. (3) are each arranged at the ends of the supports (1) or support elements, the coupling flanges (3) of adjacent supports (1) superposed on one another, support elements lying in congruent pairs and the coupling claws (13) for receiving both paired coupling flanges (3 ) and these can be braced against each other by the coupling claws (13) which can be locked thereon on the bolts (2).

2. Steel tube frame according to claim 1, characterized in that with their end faces (6, 7) upright on each other supports (1) or support elements, the two paired coupling flanges. (3) are spaced apart.

Steel tube frame according to claim 1 or 2, characterized in that the coupling flanges (3) are arranged on or near the end faces (6 or 7) of the supports (1) or support elements and at one end (5) in each of the supports (1) a centering sleeve (9) projecting axially over the relevant end face (7) of the support.

4. Steel tube frame according to Anspiruch 1 or 2, characterized in that one of the coupling flanges. (3) are arranged on the supports (1) at the end of a centering sleeve (22) projecting axially over the relevant support end face (6) from the outside onto the support end (4) and the other coupling flange (3) from the other support end face (7 ) is arranged on the support (1) essentially axially inward about the protrusion of the centering sleeve (22) on the former end face (6) of the support.

5. Steel tube frame according to one of claims 1 to 4, characterized in that the coupling flanges (3) of the supports (1) are disc-shaped.

6. A tubular steel frame according to claim 5, characterized in that the coupling flanges (3) on or near the edge of the disc have a collar (8) projecting axially from the end of the support, to which the mouth (16) of the coupling claws (13) on the bolts ( 2) is adjusted.

7. tubular steel frame according to one of claims 1 to 6, characterized in that the coupling claws (13) locked to the coupling flanges (3) radially to the. Columns (1) are aligned.

8. Steel tube frame according to one of claims 1 to 7, characterized in that at the ends of the bolt (2) two coupling claws (13, 14), of which at least one is movable and lockable relative to the other, designed as pliers (10) and are arranged.

9. tubular steel frame according to claim 8, characterized in that the in the installed state of

Bolt (2) top clutch claw (13) of the pliers (10) is fixed.

10. Steel tube frame according to claim 9, characterized in that the coupling claw (14) located in the installed state of the bolt (2) underneath between two spaced-apart jaws (11) of the pliers (10) and in the slot (12) between the jaws (11) can be inserted into a wedge (18) which presses the claw (14) below into its locking position.

11. Steel tube frame according to claim 10, characterized in that the wedge (18) can be inserted from above into the slot (12) between the jaws (11) and the pivot axis (15) of the movable claw (14) in such a distance from it The main focus is that the claw (14) oscillates with its back (21) under the influence of gravity into the space for receiving the wedge (18) inside the slot (12) between the jaws (11).

12. Steel tube frame according to claim 8 or 9, characterized in that on the pliers (10) a rotating element (24) with a movable claw (14) acting) curve (25) is mounted, which in one end position of the rotating element (24 ) the movable claw (14) is locked in the locked position.