EP0317695B1 - Metal scaffolding for buildings - Google Patents
Metal scaffolding for buildings Download PDFInfo
- Publication number
- EP0317695B1 EP0317695B1 EP88101742A EP88101742A EP0317695B1 EP 0317695 B1 EP0317695 B1 EP 0317695B1 EP 88101742 A EP88101742 A EP 88101742A EP 88101742 A EP88101742 A EP 88101742A EP 0317695 B1 EP0317695 B1 EP 0317695B1
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- EP
- European Patent Office
- Prior art keywords
- wedge
- key
- metal
- coupling half
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G7/00—Connections between parts of the scaffold
- E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
- E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
- E04G7/306—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect
- E04G7/307—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect with tying means for connecting the bars or members
Definitions
- the invention relates to a metal stand scaffold for buildings, in particular a tubular scaffold according to the preamble of claim 1.
- Stand scaffolding of this type can be designed as a so-called bar structure.
- the invention relates to tubular rod structures, the elements of which predominantly consist of steel tubes. With these scaffolds, the standpipes are connected to the various bars, which also consist of pipe sections, via the coupling.
- the invention relates to modular stand scaffolding, which allow the scaffolding to be largely adapted to the respective building.
- the couplings are screwless. This makes assembly and disassembly of the scaffolding easier and faster. Nevertheless, the stand scaffold according to the invention is safe from accidents because its couplings can be assembled without error and only with the prescribed elements, but on the other hand can not be unexpectedly released under any circumstances.
- the invention is based on a known stand structure (EP-B-0 116 679), the couplings of which implement a wedge gear.
- One coupling half attached to a standing element is designed as a flange ring and forms the slide of the wedge gear, while the other coupling half is provided with a hook to be hung on the flange ring, which ensures the positive locking.
- the gap for the driving wedge lies behind the hook, so that this coupling half forms the frame of the wedge gear.
- the driving in of the driving wedge leads to the interlocking parts being braced, the coupling half forming the frame in particular being elastically deformed.
- Such couplings are functional in stand scaffolding.
- the driving wedges can be easily driven and unscrewed from unsafe positions when assembling the scaffolding. They can be accommodated captively in the gap, which inevitably guarantees the functional condition of the couplings. They can also be carried out in a space-saving manner, so that the coupling halves can be made small and, among other things, assume a crucial weight for the usability of the standing scaffolding.
- the invention therefore relates to this fundamental Embodiment.
- the invention has for its object to provide a functional solution to the problem that has arisen due to the loosening driving wedges for the safety of metal stands of the type described.
- the driving wedge of each clutch is no longer directly applied with its wedge flank of the other coupling half. Rather, this happens with the interposition of the metal plate, which is braced with the wedge flank and with the inclined surface of the coupling half. Since the plate is attached to a coupling half, it cannot be dragged along by the driving wedge and can detach itself.
- the driving wedge tensions only with the gap and the lamella, so that the surfaces of the lamella described form additional friction surfaces which, with the wedge flanks, have the disadvantageous effects of Counteract movements of the coupling halves in the wake of vibrations.
- the driving wedge is therefore largely insensitive to vibrations, such as those that can occur, in particular, when the loads on bridges are shaken by heavy loads. Because of this, he can no longer suddenly lose his self-locking.
- This solution of the invention has the advantage that it frees the practical quick couplings, in particular of pipe stand scaffolds, of their previous uncertainties, without these couplings having to be changed in such a way that they can no longer be used.
- even existing couplings of various designs can be renovated by installing the lamella.
- new clutches are equipped with the invention from the outset.
- the lamella also serves to implement a wedge gear that works with several wedge flanks.
- This has the advantage that the tensioning of the coupling halves increases more strongly on the last section of the drive path, which prevents premature exhaustion of the wedge suit and increases or increases the friction. Wedge tightening forces are reduced.
- the lamella can also serve to hold the loosened driving wedge in the gap, for example to fix it in a form-fitting manner. This is ensured by the features of claim 3.
- the lamella clamps the loosened wedge onto its support and is tensioned even when the wedge is tightened.
- the coupling half (9) consists of a molded part, for example, which has a hollow cylindrical section (10) with which the bolt (2) consisting of a tube is welded is.
- a driving wedge (12) In the front part of section (10) there is a gap (11) for a driving wedge (12).
- the driving wedge is shown in Fig. 1 in its rest position. He takes this when the driving wedge is in its upper end position. Then the wedge surface (13) of the driving wedge (12) is supported on the lower end of the bottom (14) of the gap (11) with a recess (15) on a shoulder (16) of the bottom.
- a semicircular thickening (17) which attaches to the driving wedge tip, prevents the driving wedge from being released from the guide slot (11) when the parts assume their position shown in FIG. 2.
- the gap has an upper inlet opening (18) and a lower outlet opening (19).
- the roof surface (20) of the gap opposite the floor (14) is formed in a shaft of a hook (21), the hook mouth of which opens downwards.
- the back of the hook sits between two elevations (22), which ensure a recessed arrangement and keep mechanical stresses away from the hook.
- a recess (23) is formed in the hook shaft as a seat via a lamella (24), or the like with its upper angled end (25) in the bottom of the recess (23) with a screw (26). is attached.
- the lamella is a thin section of spring steel the width of the back of the wedge (27) on which it slides when the wedge is driven. It protrudes downwards and outwards through the inlet opening (18) of the gap (11) and through its outlet opening (19). As shown at (28), its end is thickened to form a wedge surface (29).
- the hook (21) is hung from above onto the ring flange (6).
- the wedge (12) is pivoted from its rest position shown in FIG. 1 into the starting position for bracing the coupling halves and driven from top to bottom with hammer blows (FIG. 2).
- the flank (27) of the driving wedge (12) which moves from top to bottom, slides on the fixed metal plate (24).
- the driving force of the wedge (12) increases, causing the lamella to align with its wedge surface (32) opposite flank (29) of the inclined surface (7).
- the hammer blows cause the wedge back (27) to be braced with the lamella (24) and the lamella (24) with the bearing surface (7).
- the wedge mechanism implemented in the device (8) is released by hammer blows on the part (17) of the driving wedge (12). As a result, the back of the wedge (27) is released from the lamella (24) which springs back and finally fixes the driving wedge in its starting position.
- the use of conical surfaces, as shown in (6 and 7) for the coupling half (4), is not a requirement.
- the lamella consists of spring steel and therefore returns to its starting position after pulling out the driving wedge (12), the projection (16) again engaging in the recess (15) of the driving wedge (12) according to FIG. This makes it possible to unhook the hook (22) of the coupling half (9) from the flange (5) without restriction.
- a central section (34) lies between the cranked, upper end (33) of the spring steel plate and the lower thickened plate end (28). This is delimited by the curved surfaces (35, 36) which lie opposite the wedge back (27) or the roof surface (20) of the guide slot (18). The surface (35) engages the driving wedge (12) as described above.
- the wedge guide on the lower extension (16) of the coupling half (9) is extended by the extension (16) projecting beyond the lower edge (37) of the opening (19).
- the wedge forces are concentrated on the thickening (28) and thus on the bearing surface (29).
- the exemplary embodiment according to FIG. 3 differs from the exemplary embodiment according to FIGS. 1 and 2 by a shortened slat length, that is to say restricted to the thickening (28).
- the lamella (24) has a self-aligning bearing (38) with which it can swing in the guide slot (11) in the plane of the driving wedge (12).
- the pin (39) of the self-aligning bearing sits in the apex of the triangular plan of the lamella (24).
- the crown is from the with the bearing surface (7) cooperating wedge surface (29) and the opposite surface (32) of the driving wedge (12).
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Clamps And Clips (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
Die Erfindung betrifft ein Metallstandgerüst für Bauwerke, insbesondere ein Rohrgerüst gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a metal stand scaffold for buildings, in particular a tubular scaffold according to the preamble of claim 1.
Solche Standgerüste können als sogenannte Stangengerüste ausgeführt sein. Insbesondere bezieht sich die Erfindung jedoch auf Rohrstangengerüste, deren Elemente überwiegend aus Stahlrohren bestehen. Bei diesen Gerüsten werden die Stehrohre mit den verschiedenen, ebenfalls aus Rohrabschnitten bestehenden Riegeln über die Kupplung verbunden. Insbesondere bezieht sich die Erfindung auf Modulstandgerüste, die eine weitgehende Anpassung des Gerüstes an das jeweilige Bauwerk gestatten.Stand scaffolding of this type can be designed as a so-called bar structure. In particular, however, the invention relates to tubular rod structures, the elements of which predominantly consist of steel tubes. With these scaffolds, the standpipes are connected to the various bars, which also consist of pipe sections, via the coupling. In particular, the invention relates to modular stand scaffolding, which allow the scaffolding to be largely adapted to the respective building.
In diesen und anderen Standgerüsten gemäß der Erfindung sind die Kupplungen schraubenlos. Dadurch wird die Montage und Demontage des Gerüstes erleichtert und beschleunigt. Dennoch ist das erfindungsgemäße Standgerüst unfallsicher, weil seine Kupplungen irrtumsfrei und nur mit den vorgeschriebenen Elementen zusammengefügt werden können, sich aber andererseits unter keinen Umständen unvermutet lösen.In these and other stand structures according to the invention, the couplings are screwless. This makes assembly and disassembly of the scaffolding easier and faster. Nevertheless, the stand scaffold according to the invention is safe from accidents because its couplings can be assembled without error and only with the prescribed elements, but on the other hand can not be unexpectedly released under any circumstances.
Hierbei geht die Erfindung von einem vorbekannten Standgerüst aus (EP-B- 0 116 679), dessen Kupplungen ein Keilgetriebe verwirklichen. Die eine an einem Stehelement angebrachte Kupplungshälfte ist als Flanschring ausgeführt und bildet den Schieber des Keilgetriebes, während die andere Kupplungshälfte mit einem auf den Flanschring zu hängenden Haken versehen ist, der den Formschluß gewährleistet. Hinter dem Haken liegt der Spalt für den Treibkeil, so daß diese Kupplungshälfte das Gestell des Keilgetriebes bildet. Das Eintreiben des Treibkeiles führt zur Verspannung der formschlüssigen Teile, wobei vor allem die das Gestell bildende Kupplungshälfte elastisch verformt wird.Here, the invention is based on a known stand structure (EP-B-0 116 679), the couplings of which implement a wedge gear. One coupling half attached to a standing element is designed as a flange ring and forms the slide of the wedge gear, while the other coupling half is provided with a hook to be hung on the flange ring, which ensures the positive locking. The gap for the driving wedge lies behind the hook, so that this coupling half forms the frame of the wedge gear. The driving in of the driving wedge leads to the interlocking parts being braced, the coupling half forming the frame in particular being elastically deformed.
Solche Kupplungen sind in Standgerüsten funktionsgerecht. Die Treibkeile lassen sich mit Hammerschlägen auch von unsicheren Standplätzen aus bei der Montage des Gerüstes leicht antreiben und wieder lösen. Sie können unverlierbar im Spalt untergebracht werden, wodurch der funktionsgerechte Zustand der Kupplungen zwangsläufig gewährleistet ist. Sie lassen sich auch raumsparend ausführen, so daß die Kupplungshälften klein zu bauen sind und u.a. für die Verwendbarkeit der Stehgerüste ein mitentscheidendes geringes Gewicht annehmen. Die Erfindung bezieht sich daher auf diese grundsätzliche Ausführungsform.Such couplings are functional in stand scaffolding. The driving wedges can be easily driven and unscrewed from unsafe positions when assembling the scaffolding. They can be accommodated captively in the gap, which inevitably guarantees the functional condition of the couplings. They can also be carried out in a space-saving manner, so that the coupling halves can be made small and, among other things, assume a crucial weight for the usability of the standing scaffolding. The invention therefore relates to this fundamental Embodiment.
Da bei dem vorbekannten Metallstandgerüst die beschriebenen Kupplungshälften nur einen Freiheitsgrad aufweisen, ist ihr Treibkeil nur mit seiner Keilflanke im Spalt geführt; sie dient als Anzugsfläche des Getriebes. Der Treibkeil führt sich außerdem nur noch mit seiner gegenüberliegenden geraden Flanke auf der Schrägfläche des Flanschringes. Ein solcher Treibkeil muß einen Keilwinkel aufweisen, der die Selbsthemmung gewährleistet. Daraus ergibt sich ein schlanker Flachkeil, dessen Keilwinkel jedoch nicht beliebig klein gemacht werden kann, weil der Anzugsweg des Keiles aus Funktionsgründen begrenzt werden muß. In der Praxis führt das dazu, daß sich die Treibkeile bei Erschütterung des Gerüstes lockern oder sogar herausspringen können. Die Beanspruchung der Kupplungen des Gerüstes nehmen beträchtliche Größenordnungen an, wenn in der Umgebung des Gerüstes schwellende Beanspruchungen auftreten, wie sie z.B. durch den Schwerlastverkehr in Brückenbauwerken und im Baugrund ausgelöst werden. Nehmen die Trennkräfte der Kupplungshälften nennenswerte Größenordnungen an, so führt das bei gelockerten oder herausgesprungenen Treibkeilen zum Freiwerden der Kupplungen und damit von u.U. lebenswichtigen Gerüstteilen, so daß die Sicherheit nicht mehr gewährleistet ist.Since the coupling halves described have only one degree of freedom in the known metal stand structure, their driving wedge is guided in the gap only with its wedge flank; it serves as the gear's tightening surface. The driving wedge also only runs with its opposite straight flank on the inclined surface of the flange ring. Such a driving wedge must have a wedge angle that ensures self-locking. This results in a slender flat wedge, the wedge angle of which cannot be made arbitrarily small, however, because the wedge's travel must be limited for functional reasons. In practice, this means that the driving wedges can loosen or even jump out when the scaffolding is shaken. The loads on the couplings of the scaffolding take on considerable magnitudes if there are swelling loads in the area surrounding the scaffold, such as those caused by heavy goods traffic in bridge structures and in the ground. If the separating forces of the coupling halves assume significant orders of magnitude, this will lead to the couplings becoming free when the driving wedges are loosened or jumped out possibly essential scaffolding parts, so that safety is no longer guaranteed.
Der Erfindung liegt die Aufgabe zugrunde, eine funktionsgerechte Lösung des Problems anzugeben, das durch die sich lockernden Treibkeile für die Sicherheit von Metallstandgerüsten der beschriebenen Art entstanden ist.The invention has for its object to provide a functional solution to the problem that has arisen due to the loosening driving wedges for the safety of metal stands of the type described.
Eine Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den Merkmalen des Patentanspruches 1. Zweckmäßige Ausführungsformen dieser Lösung sind Gegenstand der Unteransprüche 2 bis 5.This object is achieved according to the invention with the features of patent claim 1. Useful embodiments of this solution are the subject of subclaims 2 to 5.
Hierbei wird gemäß der Erfindung der Treibkeil jeder Kupplung nicht mehr unmittelbar mit seiner Keilflanke der anderen Kupplungshälfte angelegt. Das geschieht vielmehr unter Zwischenschaltung der Metallamelle, die mit der Keilflanke und mit der Schrägfläche der Kupplungshälfte verspannt wird. Da die Lamelle an einer Kupplungshälfte festgelegt ist, kann sie von dem Treibkeil nicht mitgeschleppt werden und sich selbständig lösen. Andererseits verspannt sich der Treibkeil nur mit dem Spalt und der Lamelle, so daß die beschriebenen Flächen der Lamelle zusätzliche Reibungsflächen bilden, die mit den Keilflanken den nachteiligen Auswirkungen von Bewegungen der Kuplungshälften im Gefolge von Erschütterungen entgegenwirken. Der Treibkeil ist daher gegen Schwingungen, wie sie insbesondere bei rüttelnden Beanspruchungen durch den Schwerlastverkehr an Brücken auftreten können, weitgehend unempfindlich. Er kann deswegen seine Selbsthemmung auch nicht mehr unvermutet verlieren.Here, according to the invention, the driving wedge of each clutch is no longer directly applied with its wedge flank of the other coupling half. Rather, this happens with the interposition of the metal plate, which is braced with the wedge flank and with the inclined surface of the coupling half. Since the plate is attached to a coupling half, it cannot be dragged along by the driving wedge and can detach itself. On the other hand, the driving wedge tensions only with the gap and the lamella, so that the surfaces of the lamella described form additional friction surfaces which, with the wedge flanks, have the disadvantageous effects of Counteract movements of the coupling halves in the wake of vibrations. The driving wedge is therefore largely insensitive to vibrations, such as those that can occur, in particular, when the loads on bridges are shaken by heavy loads. Because of this, he can no longer suddenly lose his self-locking.
Diese Lösung der Erfindung hat den Vorteil, daß sie die praktischen Schnellkupplungen insbesondere von Rohrstandgerüsten von ihren bisherigen Unsicherheiten befreit, ohne daß diese Kupplungen derart verändert werden müssen, daß sie nicht weiter verwendbar sind. Tatsächlich können sogar vorhandene Kupplungen der verschiedensten Bauformen durch den Einbau der Lamelle saniert werden. Insbesondere werden aber neue Kupplungen von vornherein mit der Erfindung ausgerüstet.This solution of the invention has the advantage that it frees the practical quick couplings, in particular of pipe stand scaffolds, of their previous uncertainties, without these couplings having to be changed in such a way that they can no longer be used. In fact, even existing couplings of various designs can be renovated by installing the lamella. In particular, however, new clutches are equipped with the invention from the outset.
Vorzugsweise und mit den Merkmalen des Patentanspruches 2 dient die Lamelle außerdem zur Verwirklichung eines mit mehreren Keilflanken arbeitenden Keilgetriebe. Das hat den Vorteil, daß hierbei die Verspannung der Kupplungshälften auf dem letzten Abschnitt des Treibweges stärker anwächst, wodurch eine vorzeitige Erschöpfung des Keilanzuges verhindert und die Reibung erhöht bzw. Keilanzugskräfte vermindert werden.Preferably and with the features of claim 2, the lamella also serves to implement a wedge gear that works with several wedge flanks. This has the advantage that the tensioning of the coupling halves increases more strongly on the last section of the drive path, which prevents premature exhaustion of the wedge suit and increases or increases the friction. Wedge tightening forces are reduced.
Die Lamelle kann außerdem dazu dienen, den gelockerten Treibkeil im Spalt festzuhalten, beispielsweise formschlüssig festzulegen. Das gewährleisten die Merkmale des Patentanspruches 3. Die Lamelle spannt den gelockerten Keil auf seine Abstützung und wird selbst bei angezogenem Keil gespannt.The lamella can also serve to hold the loosened driving wedge in the gap, for example to fix it in a form-fitting manner. This is ensured by the features of claim 3. The lamella clamps the loosened wedge onto its support and is tensioned even when the wedge is tightened.
Zweckmäßig wird die Lamelle auch gegen gewaltsame Einwirkungen von außen geschützt. Dazu dienen die Merkmale der Patentansprüche 4 und 5, weil hierbei die Befestigung der Lamelle und ihre dazu dienenden Abschnitte versenkt in der betreffenden Kupplungshälfte untergebracht sind.The slat is also expediently protected against violent external influences. For this purpose, the features of
Die Erfindung wird im folgenden anhand beispielsweiser Ausführungen ihrer beiden Lösungsgedanken näher erläutert, die in den Zeichnungen wiedergegeben sind. Diese zeigen im Längsschnitt die beiden Kupplungshälften an einem Rohrstandgerüst mit den abgebrochen wiedergegebenen, gekuppelten Rohren und zwar in
- Fig. 1
- eine erste Ausführungsform des zuerst beschriebenen Lösungsgedankens der Erfindung vor dem Antreiben des Treibkeiles,
- Fig. 2
- den Gegenstand der Fig. 2 mit verspanntem Treibkeil,
- Fig. 3
- eine demgegenüber abgeänderte Ausüfhrung in der Fig. 2 entsprechender Darstellung,
Ein Stehrohr (1) eines im übrigen nicht dargestellten Rohrstandgerüstes ist mit einem Gerüstriegel (2) mit Hilfe einer mechanischen Kupplung verbunden. Eine Hälfte (4) der Kupplung (3) besteht aus einem Ring, der an dem Stehrohr (1) befestigt ist. Der Ring bildet einen Flansch (5), der eine nach oben in Richtung auf das Stehrohr (1) geneigte Kegelfläche (6) und eine entgegengesetzt geneigte untere Kegelfläche bildet, die mit (7) bezeichnet ist und als Lagerfläche für ein Keilgetriebe (8) dient. Es dient dazu, die an dem Stehrohr (1) feste und von dem beschriebenen Ring gebildete Kupplungshälfte (4) mit der anderen Kupplungshälfte (9) rüttelfest zu verbinden.The invention is explained in more detail below on the basis of exemplary embodiments of its two solution ideas, which are shown in the drawings. These show in longitudinal section the two coupling halves on a pipe stand with the broken-off, coupled pipes shown in
- Fig. 1
- a first embodiment of the first solution of the invention described before driving the driving wedge,
- Fig. 2
- 2 with a taut driving wedge,
- Fig. 3
- a modified version in comparison with FIG. 2,
A standpipe (1) of a pipe stand frame (not shown) is connected to a scaffold bolt (2) with the help of a mechanical coupling. One half (4) of the coupling (3) consists of a ring which is attached to the standpipe (1). The ring forms a flange (5) which forms a conical surface (6) which is inclined upwards in the direction of the standing tube (1) and an oppositely inclined lower conical surface which is designated by (7) and as a bearing surface for a wedge gear (8). serves. It is used to connect the coupling half (4), which is fixed to the standing tube (1) and is formed by the ring described, to the other coupling half (9) in a vibration-proof manner.
Die Kupplungshälfte (9) besteht aus einem beispielsweise gegossenen Formstück, das einen hohlzylindrischen Abschnitt (10) aufweist, mit dem der aus einem Rohr bestehende Riegel (2) verschweißt ist. Im vorderen Teil des Abschnittes (10) befindet sich ein Spalt (11) für einen Treibkeil (12). Der Treibkeil ist in Fig. 1 in seiner Ruhestellung wiedergegeben. Diese nimmt er ein, wenn der Treibkeil in seine obere Endstellung verbracht ist. Dann stützt sich die Keilfläche (13) des Treibkeiles (12) auf dem unteren Ende des Bodens (14) des Spaltes (11) mit einer Aussparung (15) auf einem Ansatz (16) des Bodens ab. Eine halbkreisförmige Verdickung (17), welche an der Treibkeilspitze ansetzt, verhindert das Freiwerden des Treibkeils aus dem Führungsschlitz (11), wenn die Teile ihre aus Fig. 2 ersichtliche Stellung einnehmen.The coupling half (9) consists of a molded part, for example, which has a hollow cylindrical section (10) with which the bolt (2) consisting of a tube is welded is. In the front part of section (10) there is a gap (11) for a driving wedge (12). The driving wedge is shown in Fig. 1 in its rest position. He takes this when the driving wedge is in its upper end position. Then the wedge surface (13) of the driving wedge (12) is supported on the lower end of the bottom (14) of the gap (11) with a recess (15) on a shoulder (16) of the bottom. A semicircular thickening (17), which attaches to the driving wedge tip, prevents the driving wedge from being released from the guide slot (11) when the parts assume their position shown in FIG. 2.
Der Spalt hat eine obere Eintrittsöffnung (18) und eine untere Austrittsöffnung (19). Die dem Boden (14) gegenüberliegende Dachfläche (20) des Spaltes ist in einem Schaft eines Hakens (21) ausgebildet, dessen Hakenmaul sich nach unten öffnet. Der Hakenrücken sitzt zwischen zwei Erhebungen (22), welche eine versenkte Anordnung gewährleisten und mechanische Beanspruchungen von dem Haken fernhalten.The gap has an upper inlet opening (18) and a lower outlet opening (19). The roof surface (20) of the gap opposite the floor (14) is formed in a shaft of a hook (21), the hook mouth of which opens downwards. The back of the hook sits between two elevations (22), which ensure a recessed arrangement and keep mechanical stresses away from the hook.
Zwischen den Teilen (22) ist im Hakenschaft eine Aussparung (23) als Sitz über eine Lamelle (24) ausgebildet, die mit ihrem oberen abgewinkelten Ende (25) im Boden der Aussparung (23) mit einer Schraube (26) o.dgl. befestigt ist.Between the parts (22), a recess (23) is formed in the hook shaft as a seat via a lamella (24), or the like with its upper angled end (25) in the bottom of the recess (23) with a screw (26). is attached.
Die Lamelle ist ein dünner Federstahlabschnitt von der Breite des Keilrückens (27), auf dem sie gleitet, wenn der Keil getrieben wird. Sie ragt durch die Eintrittsöffnung (18) des Spaltes (11) und durch dessen Austrittsöffnung (19) nach unten und außen. Ihr Ende ist, wie bei (28) dargestellt, verdickt unter Ausbildung einer Keilfläche (29).The lamella is a thin section of spring steel the width of the back of the wedge (27) on which it slides when the wedge is driven. It protrudes downwards and outwards through the inlet opening (18) of the gap (11) and through its outlet opening (19). As shown at (28), its end is thickened to form a wedge surface (29).
Zur Montage wird der Haken (21), wie aus der Zeichnung ersichtlich, von oben auf den Ringflansch (6) gehängt. Sodann wird der Keil (12) aus seiner in Fig. 1 wiedergegebenen Ruhestellung in die Ausgangsstellung zur Verspannung der Kupplungshälften geschwenkt und von oben nach unten mit Hammerschlägen angetrieben (Fig. 2). Hierbei gleitet auf der festliegenden Metallamelle (24) die sich von oben nach unten bewegende Flanke (27) des Treibkeils (12). Sobald sie an der Keilspitze (31) die Keilfläche (32) der Lamelle (24) erreicht, wächst die Vortriebskraft des Keils (12) an, wodurch sich die Lamelle mit ihrer der Keilfläche (32) gegenüberliegenden Flanke (29) der Schrägfläche (7) anlegt. Durch die Hammerschläge tritt eine Verspannung des Keilrückens (27) mit der Lamelle (24) und der Lamelle (24) mit der Lagerfläche (7) ein.For assembly, the hook (21), as can be seen in the drawing, is hung from above onto the ring flange (6). Then the wedge (12) is pivoted from its rest position shown in FIG. 1 into the starting position for bracing the coupling halves and driven from top to bottom with hammer blows (FIG. 2). The flank (27) of the driving wedge (12), which moves from top to bottom, slides on the fixed metal plate (24). As soon as it reaches the wedge surface (32) of the lamella (24) at the wedge tip (31), the driving force of the wedge (12) increases, causing the lamella to align with its wedge surface (32) opposite flank (29) of the inclined surface (7). The hammer blows cause the wedge back (27) to be braced with the lamella (24) and the lamella (24) with the bearing surface (7).
Das Lösen des in der Vorrichtung (8) verwirklichten Keilgetriebes geschieht durch Hammerschläge auf den Teil (17) des Treibkeils (12). Dadurch löst sich der Keilrücken (27) von der Lamelle (24), die zurückfedert und den Treibkeil schließlich in seiner Ausgangsstellung festlegt.The wedge mechanism implemented in the device (8) is released by hammer blows on the part (17) of the driving wedge (12). As a result, the back of the wedge (27) is released from the lamella (24) which springs back and finally fixes the driving wedge in its starting position.
Zur Verwirklichung der Erfindung ist die Verwendung von Kegelflächen, wie sie bei (6 und 7) für die Kupplungshälfte (4) dargestellt sind, nicht Voraussetzung. Die Lamelle besteht aus Federstahl und kehrt deswegen nach Herausziehen des Treibkeils (12) in ihre Ausgangsstellung zurück, wobei der Vorsprung (16) wiederum in die Aussparung (15) des Treibkeils (12) nach Fig.1 einrastet. Dadurch ist es möglich, das Aushängen des Hakens (22) der Kupplungshälfte (9) aus dem Flansch (5) ohne Einschränkung zu ermöglichen.To implement the invention, the use of conical surfaces, as shown in (6 and 7) for the coupling half (4), is not a requirement. The lamella consists of spring steel and therefore returns to its starting position after pulling out the driving wedge (12), the projection (16) again engaging in the recess (15) of the driving wedge (12) according to FIG. This makes it possible to unhook the hook (22) of the coupling half (9) from the flange (5) without restriction.
Zwischen dem abgekröpften, oberen Ende (33) der Federstahllamelle und dem unteren verdickten Lamellenende (28) liegt ein Mittelabschnitt (34). Dieser wird von den gekrümmten Flächen (35, 36) begrenzt, welche dem Keilrücken (27) bzw. der Dachfläche (20) des Führungsschlitzes (18) gegenüberliegen. Mit der Fläche (35) wird das Einrasten des Treibkeils (12) wie oben beschrieben herbeigeführt.A central section (34) lies between the cranked, upper end (33) of the spring steel plate and the lower thickened plate end (28). This is delimited by the curved surfaces (35, 36) which lie opposite the wedge back (27) or the roof surface (20) of the guide slot (18). The surface (35) engages the driving wedge (12) as described above.
Wie sich ferner aus den Fig. 1 und 2 ergibt, ist die Keilführung auf dem unteren Ansatz (16) der Kupplungshälfte (9) verlängert, indem der Ansatz (16) über den unteren Rand (37) der Öffnung (19) vorsteht. Hierdurch werden die Keilkräfte auf die Verdickung (28) und damit auf die Lagerfläche (29) konzentriert.1 and 2, the wedge guide on the lower extension (16) of the coupling half (9) is extended by the extension (16) projecting beyond the lower edge (37) of the opening (19). As a result, the wedge forces are concentrated on the thickening (28) and thus on the bearing surface (29).
Das Ausführungsbeispiel nach Fig. 3 unterscheidet sich nach dem Ausführungsbeispiel nach den Fig. 1 und 2 durch eine verkürzte, d.h. auf die Verdickung (28) beschränkte Lamellenlänge. Hierbei hat die Lamelle (24) ein Pendellager (38), mit dem sie im Führungsschlitz (11) in der Ebene des Treibkeils (12) schwingen kann. Der Zapfen (39) des Pendellagers sitzt im Scheitel des dreieckförmigen Grundrisses der Lamelle (24). Der Scheitel wird von der mit der Lagerfläche (7) zusammenwirkenden Keilfläche (29) und der dieser gegenüberliegenden Fläche (32) des Treibkeils (12) gebildet.The exemplary embodiment according to FIG. 3 differs from the exemplary embodiment according to FIGS. 1 and 2 by a shortened slat length, that is to say restricted to the thickening (28). The lamella (24) has a self-aligning bearing (38) with which it can swing in the guide slot (11) in the plane of the driving wedge (12). The pin (39) of the self-aligning bearing sits in the apex of the triangular plan of the lamella (24). The crown is from the with the bearing surface (7) cooperating wedge surface (29) and the opposite surface (32) of the driving wedge (12).
Claims (5)
- Metal scaffolding for buildings, particularly tubular scaffolding, whose components (1, 2) are connected together by couplings (3) to which rigid halves (4, 9) are connected so as to be form-closed relative to a respective component (1, 2) and which are respectively braced with a key gear (8), whereby one side (27) of the tapered key (12) is arranged on an inclined surface (32) of one rigid coupling half (4), preferably on a vertical component (1), and the side (13) opposite the side (27) is formed with a key surface, wherein the tapered key (12) is disposed in an aperture (11) which is made in the other coupling half (9), characterised in that the tapered key (12) with its side (27) adjacent to the inclined surface (7) of the coupling slides on a metal shim (24) which is located in the aperture (11) on the other coupling half (9) and extends through a cutout (19) as far as the inclined surface (7) of the coupling half (4).
- Metal scaffolding according to claim 1, characterised in that the metal shim (24) has at its end (28) adjacent to the point of the key a key surface (28) acting in conjunction with the abutting side (7) of the tapered key.
- Metal scaffolding according to one of claims 1 or 2, characterised in that the key surface (28) of the metal shim (24) is formed at its end so as to be normal to the key sides (27) and thickened on both sides.
- Metal scaffolding according to one of claims 1 to 3, characterised in that the metal shim (24) is bent outside the entry opening (18) of the aperture (11) and is fixed at this end (25) in a cutout (26) of the coupling half.
- Metal scaffolding according to one of claims 1 to 4, characterised in that the shim (24) is fixed so as to be rotatable in the aperture (11) with a self-aligning bearing (38) which is arranged in the apex at the base of the key sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88101742T ATE65282T1 (en) | 1987-11-27 | 1988-02-06 | METAL SCAFFOLDING FOR BUILDINGS. |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3740231 | 1987-11-27 | ||
| DE3740231 | 1987-11-27 | ||
| DE3800169 | 1988-01-07 | ||
| DE19883800169 DE3800169A1 (en) | 1987-11-27 | 1988-01-07 | Upright metal scaffolding for structures |
| DE3802172 | 1988-01-26 | ||
| DE19883802172 DE3802172A1 (en) | 1988-01-26 | 1988-01-26 | Upright metal scaffolding for structures, in particular tubular scaffolding |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90123373.4 Division-Into | 1990-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0317695A1 EP0317695A1 (en) | 1989-05-31 |
| EP0317695B1 true EP0317695B1 (en) | 1991-07-17 |
Family
ID=27196840
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88101742A Expired - Lifetime EP0317695B1 (en) | 1987-11-27 | 1988-02-06 | Metal scaffolding for buildings |
| EP19900123373 Withdrawn EP0430308A3 (en) | 1987-11-27 | 1988-02-06 | Metal scaffolding for buildings |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900123373 Withdrawn EP0430308A3 (en) | 1987-11-27 | 1988-02-06 | Metal scaffolding for buildings |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP0317695B1 (en) |
| DE (1) | DE3863753D1 (en) |
| DK (1) | DK76888A (en) |
| NO (1) | NO880568L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2680196A1 (en) * | 1991-08-05 | 1993-02-12 | Atem Sa | DEVICE FOR ASSEMBLING AND ATTACHING AN END OF A RUNWAY TO AN EDGE AND SCAFFOLDING SYSTEM COMPRISING TRAVERS HAVING EACH OF THE END OF SUCH A DEVICE. |
| DE4242031B4 (en) * | 1992-12-12 | 2004-09-30 | Günter Rux GmbH | metal framework |
| FR2755166B1 (en) * | 1996-10-24 | 1998-12-31 | Adam Denis | IMPROVED CONNECTION DEVICE FOR MESHED SUPPORT STRUCTURE SUCH AS SCAFFOLDING |
| CN103032658B (en) * | 2012-12-24 | 2014-10-29 | 广东威创视讯科技股份有限公司 | Locking mechanism for rear projection screen frame |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH384190A (en) * | 1963-03-28 | 1964-11-15 | Pedroli Dante | Device for making scaffolding, axle-holder ties, trestles and tubular structures in general |
| AU518442B2 (en) * | 1977-06-06 | 1981-10-01 | Cyclone Scaffolding Pty. Limited | Scaffold interconnections |
| EP0009680B1 (en) * | 1978-10-02 | 1981-10-14 | Gerhard Dobersch | Steel tubing scaffold |
| SE423735B (en) * | 1979-10-19 | 1982-05-24 | Goeteborg Staellningsgruppen | DEVICE FOR CONNECTING SIDE-ORIENTED POSITION ELEMENTS WITH STANDS IN A BUILDING POSITION OR LIKE |
| DE3103470C2 (en) * | 1981-02-02 | 1984-01-19 | Udo 4836 Herzebrock Rose | Tubular steel frame |
| FR2527711B1 (en) * | 1982-05-28 | 1986-08-22 | Select Etem Sa | ASSEMBLY KNOT FOR VARIOUS STRUCTURES, SUCH AS SCAFFOLDING |
| US4445307A (en) * | 1982-11-08 | 1984-05-01 | Figgie International Inc. | Scaffold joint for a scaffold structure |
-
1988
- 1988-02-06 DE DE8888101742T patent/DE3863753D1/en not_active Expired - Lifetime
- 1988-02-06 EP EP88101742A patent/EP0317695B1/en not_active Expired - Lifetime
- 1988-02-06 EP EP19900123373 patent/EP0430308A3/en not_active Withdrawn
- 1988-02-09 NO NO88880568A patent/NO880568L/en unknown
- 1988-02-15 DK DK076888A patent/DK76888A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0317695A1 (en) | 1989-05-31 |
| NO880568D0 (en) | 1988-02-09 |
| DK76888A (en) | 1989-05-28 |
| EP0430308A3 (en) | 1991-06-26 |
| EP0430308A2 (en) | 1991-06-05 |
| NO880568L (en) | 1989-05-29 |
| DE3863753D1 (en) | 1991-08-22 |
| DK76888D0 (en) | 1988-02-15 |
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