EP0538612A1 - Building seaffold bracket or similar - Google Patents

Abstract

A scaffold bracket, in particular for a building scaffold, is proposed which, on the one hand, is space-saving during transportation and storage and, on the other hand, is easy to handle and has a high stability. In order, moreover, to make the scaffold bracket collapsible, a horizontal load-bearing strut 3 is subdivided into two portions 4, 5 and connected by means of an articulation 8. When the scaffold bracket is collapsed, this articulation 8 is displaced upwards. As a result, the collapsed scaffold bracket is provided as a compact structural unit. <IMAGE>

Description

The invention relates to a scaffold console, in particular for scaffolding, according to the preamble of claim 1.

Such scaffold consoles (e.g. DE 39 22 722 A1) are being used to an increasing extent when carrying out construction work to erect protective scaffolding. They form so-called cantilever scaffolds for the construction of which the scaffold brackets with hooks are hooked into corresponding devices, such as steel loops that are concreted into the ceiling reinforcements of buildings. To form a stand, floor boards are placed on horizontal support struts of the scaffold consoles. Nets, ropes or boards can also be fastened to the provided brackets of railing struts, which run vertically upward from the support struts of the scaffold brackets at their end facing away from the building, to form a railing. Some improvements to such scaffold consoles have already been proposed to improve their usability.

A height-adjustable scaffold console has become known, for example, from utility model 19 04 735. The Hanging hook of such a console is no longer firmly connected to the vertical strut, but can be fastened at various points on the vertical strut with the aid of a retaining bolt which, when assembled, penetrates a corresponding hole in the hanging hook and in the vertical strut.

Furthermore, a scaffold console is known from DE-OS 28 02 220, in which the railing strut is designed to be pivotable. At least two different positions are provided, so that either a vertical railing can be built up with the help of the railing strut or a catch device can also be formed in an inclined position of the railing strut with safety nets.

DE 39 22 722 finally describes a scaffold console which is designed to be foldable for time-saving assembly and disassembly and for space-saving transport and storage. In such a scaffold bracket, an inclined support strut is telescopically extendable and detachably fastened with a plug pin on the side of a support strut facing away from the building. All other connections of the different struts are designed as joints. To fold up, the socket bolt, which creates the connection between the telescopic support strut and the support strut, is loosened and the oblique support strut is brought up to the vertical strut, which is parallel to the wall of the building in the suspended state, and is shortened due to its telescopic design. Then the support strut can be folded down and the railing strut can be swiveled upwards parallel to the support strut.

A disadvantage of this known device is, above all, the fact that the oblique support strut, which nevertheless has to support a large part of the load, is designed telescopically.

If this strut is not additionally fixed in length in the opened state of the scaffold console, which cannot be seen from the description, it can easily give in length, for example, when the upper horizontal support strut bends, provided that the additional stiffeners proposed in the exemplary embodiment there are missing. With additional built-in stiffening struts, however, a total of four plug bolts have to be removed to fold the scaffold console, which makes handling this version more difficult.

Finally, this known scaffold console cannot be opened in the state hung on a building wall without additional aids, since for this purpose the hanging struts must first be pivoted upwards and then the oblique support strut must be fastened to the side of the strut facing away from the building with a socket bolt . Since the console cannot be loaded without this important plug connection, holding the carrying strut and the support strut and inserting the plug pin by a person in the building should hardly be feasible. An additional mounting platform is therefore required for mounting in the suspended state.

The object of the invention is to propose a scaffold console which is space-saving during transport and storage and easy to use and which has greater stability. In addition, such a scaffold console should also be folded up to be hooked into corresponding holding tabs and, in the hooked-in state, can be opened without further aids.

This object is achieved on the basis of a scaffold console of the type described in the introduction by the characterizing features of claim 1.

Since the support strut consists of one piece for reasons of stability, the support strut is divided into two articulated sections according to the invention. All struts are articulated at their ends. The joint connecting the two support strut sections is designed in such a way that when the support strut is compressed, the hinge point can only deflect upward from the two outer ends. With a load from above, the two support strut sections connected with such a joint behave like a rigid strut. This can be achieved, for example, by extending the one support strut section beyond the hinge point. When the support strut is opened, this extension piece then lies on the other support strut section.

A scaffold console according to the invention forms a right-angled triangle in the side view, disregarding a possible railing strut, the hypotenuse of which is given by the oblique support strut and the cathodes of which are provided by the horizontal support strut or the vertical holding strut to which the hooks are attached. The vertical support strut and the oblique support strut should be folded together so that they are parallel to each other by folding them at only one joint within the horizontal support strut, extending in a straight line from the two sections of the support strut to the joint connecting them.

This results in constraints for the position of the joint within the support strut, which are explained in more detail below with reference to the drawing.

For additional stiffening of the construction, a telescopic strut can be attached between the support strut and the lower end of the console, where the strut and the support strut meet. This in length The variable additional strut reaches its shortest length when the scaffold console is open. For this purpose, a stop can be provided which prevents this additional strut from being shortened further. In this way, the additional strut formed in this way is a fully suitable support without any further fixing aid, which can in particular attack precisely at the weakest point of the support strut, ie at the joint connecting the two sections.

It is also intended to integrate a height adjustment for the hooks into such a scaffold console. For this purpose, a threaded spindle which is integrated into the holding strut and is only rotatable but is otherwise fixed is provided, which can rotate in an internal thread of a lock nut which in turn is firmly connected to the hook. By turning this threaded spindle, the hook is moved lengthways along the strut.

In addition, it is provided to provide a device for the horizontal alignment of the support strut at the lower end of the scaffold console, with which the distance of this lower end to the building wall and thus the parallel alignment of the holding strut to the building wall can be adjusted. It would also be conceivable to use a prop that can be actuated by a thread.

A railing strut that can be pivoted towards the support strut can also be attached to the scaffold console described without difficulty. In order to achieve the required high stability in the fixation of such a railing strut, it is particularly advantageous in this case to use a fixing sleeve which can be displaced along the railing strut. The fixation sleeve is guided over a protrusion that is firmly connected to the horizontal support strut and stands vertically upwards, which also serves as a stop when the railing strut is folded up, and is then wedged.

By designing the holding or supporting strut as a tube with a scaffold diameter, the scaffold console can be easily integrated into conventional scaffolding using standard scaffold tube couplings.

The scaffold console according to the invention can be made entirely or partially of aluminum, which would provide corrosion protection without an additional protective coating and, above all, a significant reduction in weight. This would enable practical handling of the scaffold console without mechanical help.

Fig. 1

eine Seitenansicht einer Gerüstkonsole in aufgeklapptem Zustand,

Fig. 2

eine Seitenansicht einer Gerüstkonsole in zusammengeklapptem Zustand und

Fig. 3

eine schematische Zeichnung der Arretierungsvorrichtung der Geländerstrebe.

Further details and advantages of the invention are explained in more detail in the following description of an embodiment with reference to the drawing. Show it

Fig. 1

a side view of a scaffold console in the open state,

Fig. 2

a side view of a scaffold console in the folded state and

Fig. 3

is a schematic drawing of the locking device of the railing strut.

The scaffold bracket shown in Fig. 1 comprises a support strut 1, a support strut 2 and a support strut 3, which is composed of the two support strut sections 4 and 5. At the upper end of the strut 1 there is a hook 6 and at its lower end an adjustable support 7. The strut 3 is on one
Hinged joint 8, which connects the two support strut sections 4 and 5, is supported by a telescopic stiffening strut 9 which is variable in length. The length of the stiffening strut 9 is limited by a stop 10. At the outer end of the strut section 5 is a attached. Fastening hooks 13 for receiving railing boards (not shown) are attached to the railing support.

In Fig. 2 the scaffold console can be seen in the folded state. The two strut sections 4 and 5 are folded up. The support strut 2 has been moved in the direction of the support strut 1, the support strut 1 and the support strut 2 enclosing the pulled-apart stiffening strut 9. Since the hinge point 8 has deviated upwards, the stiffening strut 9 has its maximum length in this state of the scaffold console. The railing strut 10, which was originally arranged perpendicular to the support strut section 5, is pivoted through 90 ° and now points upwards parallel to it.

From the arrangement of the holding, supporting and carrying strut in the form of a right-angled triangle shown in FIG. 1, and the parallel arrangement (see FIG. 2) of the holding strut 1 with the supporting strut section 4 as an extension on the one hand and the supporting strut 3 with the supporting strut section 5 as an extension, on the other hand, the following conditions result for the position of the joint 8 and the length of the support strut sections 4 and 5. The length of the support strut 1 is given with a, the length of the support strut 3 with b and the length of the support strut 2 with c . The length of the strut section 4 be l₁ and the length of the strut section 5 be l₂.

$\text{b² + a² = c² (rechtwinkliges Dreieck)}$

$\text{l₁ + a = l₂ + c}$

Durch einfache Rechnung ergibt sich:

$\text{l₁ = 1/2 (√}\overline{\text{c² - a²}}\text{+ c - a)}$

$\text{und l₂ = 1/2 (√}\overline{\text{c² - a²}}\text{+ a - c)}$

Aus dieser Berechnung zeigt sich, daß die geometrische Lage des Gelenkpunktes 8 stets von den Längen a, c der Haltestrebe 1 sowie der Stützstrebe 2 abhängig ist.The following applies:

$\text{l = l₁ + l₂}$

$\text{b² + a² = c² (right triangle)}$

$\text{l₁ + a = l₂ + c}$

A simple calculation results in:

$\text{l₁ = 1/2 (√}\overline{\text{c² - a²}}\text{+ c - a)}$

$\text{and l₂ = 1/2 (√}\overline{\text{c² - a²}}\text{+ a - c)}$

This calculation shows that the geometric position of the hinge point 8 is always dependent on the lengths a, c of the support strut 1 and the support strut 2.

When folded up, the scaffold console can be conveniently attached to a building wall. By lifting, for example with a crane, which acts on the articulation point 8, the scaffold console remains in this position due to its own weight and, after being hooked into the lugs of the building wall, automatically folds down due to its weight when the holding force of the crane decreases. After the covering boards have been put on without any problems, the railing support can be opened and wedged comfortably.

In Fig. 1, an internal thread 14 of the hook 6 and a threaded spindle 15 connected to the holding strut 2 in the longitudinal direction are shown in dashed lines. The hook hook engages in the strut 2 through a longitudinal slot (not visible in FIG. 1). When turning the threaded spindle 15, the hook 6 moves through the internal thread 14 in the longitudinal direction of the holding strut in the longitudinal slot, not shown.

FIG. 3 shows an enlarged detail of the locking device 12 of the railing strut 11 by means of a wedge device. A guide sleeve 16 with a wedge box 17 attached to it encompasses the railing strut 11 and is displaceable in the vertical direction. In its lowest position, shown in FIGS. 1 and 3, the wedge box 17 encloses a projection 18 which is firmly connected to the support strut section 5. From above a wedge 19 is hammered into the wedge box 17, which clamps the projection 18. Thus, the railing strut 11 is firmly connected to the support strut section 5 at a right angle. The stop surface 20 limits the angle between the support strut 3 and the railing strut 11.

To release the wedge connection, the clamping wedge 19 is knocked loose from below and the guide sleeve 16 is raised so far that the wedge box 17 is located above the projection 18. The railing strut 11 can then be folded around the rotation axis 21 to the left by 90 °, as shown in FIG. 2.

Claims (13)

Scaffolding console, in particular for scaffolding that can be suspended in two loops, for example, with a horizontal support strut on which floorboards or the like that form a base can be placed, at least two scaffolding consoles arranged at a distance from one another being necessary with an obliquely downwardly extending support strut which forms a right-angled triangle with the horizontal support strut and a vertical support strut on which a suspension device is provided, all struts being articulated to one another, characterized in that the horizontal support strut (3) is divided into two support strut sections (4 and 5) which are connected to each other with a joint (8) and that the scaffold console can be folded in such a way that the joint (8) connecting the two support strut sections (4 and 5) dodges upwards when the support strut (3) is folded together and in the folded state the originally Schr saw support strut (20 from the section (5) of the support strut (3) facing it and the vertical support strut (1) from the other strut section (4) of the support strut (3) are extended approximately in a straight line and are arranged parallel to one another. Scaffolding console according to claim 1, characterized in that a telescopic reinforcing strut (9) variable in length is attached to the lower end of the holding strut (1) or the supporting strut (2) which supports the carrying strut (3). Scaffold console according to claim 1 or 2, characterized in that the minimum length of the stiffening strut (9) is limited by a stop. Scaffold console according to claim 1, characterized in that the length (l₁) of the support strut section (4) facing the holding strut (1) is given by the following formula, the length of the holding strut (1) with a and the length of the oblique support strut (2) denoted by c:

$\text{l₁ = 1/2 (√}\overline{\text{c² - a²}}\text{+ c - a)}$

Scaffold console according to claim 1, characterized in that the joint (8) in the support strut (3) is designed with a stop such that the support strut (3) can only be folded upwards. Scaffolding console according to claim 1, characterized in that a hook (6) is slidably attached to the holding strut (1). Scaffolding console according to claim 1 or 6, characterized in that the hooking hook (6) is provided with an internal thread projecting through a longitudinal slot into the holding strut, whereby the hooking hook (6) by means of a rotatable threaded spindle (15) fixedly attached to the holding strut (1) ) is adjustable in its mounting location on the support strut (1). Scaffolding console according to claim 1, characterized in that a longitudinally adjustable support (7) is adjustably attached as a wall spacer at the lower end of the holding strut (1). Scaffolding console according to claim 1, characterized in that a railing strut (11) leading vertically upwards and attached to the carrying strut (3) is provided at the outer end of the upper support strut section (5). Scaffold console according to claim 1 or 9, characterized in that the angle between the support strut (3) and the railing strut (11) is limited at the top by a stop surface. Scaffold console according to claim 1, characterized in that the railing strut (11) in its unfolded position can be firmly wedged to the carrying strut (3) by means of a wedge connection (17, 18, 19). Scaffold console according to claim 1, characterized in that the holding (1) and / or support strut (2) are designed as a tube with a scaffold tube diameter for fastening a commercially available scaffold tube coupling. Scaffold console according to claim 1, characterized in that the struts (1, 2, 3, 9, 11) are made entirely or partially as aluminum or steel.

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