EP0389933B1 - Apertured locking disc for connecting devices of scaffolding elements - Google Patents
Apertured locking disc for connecting devices of scaffolding elements Download PDFInfo
- Publication number
- EP0389933B1 EP0389933B1 EP90105278A EP90105278A EP0389933B1 EP 0389933 B1 EP0389933 B1 EP 0389933B1 EP 90105278 A EP90105278 A EP 90105278A EP 90105278 A EP90105278 A EP 90105278A EP 0389933 B1 EP0389933 B1 EP 0389933B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wedge
- holes
- push
- abutment surface
- scaffolding elements
- 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
- E04G7/32—Scaffolding bars or members with non-detachably fixed coupling elements with coupling elements using wedges
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/30—Laterally related members connected by latch means, e.g., scaffold connectors
Definitions
- connection heads and wedges are known.
- High-strength perforated disks are required for such connecting devices, a wedge contact surface on which the wedge is supported being formed on the outer edge of the hole, while the precise positioning of the inner edge of the wedge hole is not important.
- Perforated disks with corresponding wedge holes, alternately small and large, as can be seen from the drawings, have proven themselves for 15 years.
- scaffolding elements are made of light metal. Standardized scaffolding is bound to certain dimensions that are binding for all interchangeable elements. For this reason, the permissible loads are often severely limited by the material properties and the specified dimensions.
- the areas around the wedge holes represent the force application and transmission areas that can be used to optimize the clamping forces and payloads.
- the basic use of light metal for such scaffolding is such. B. become known in DE-OS 37 02 057 A1. However, one always used the old hole shapes and only tried to take advantage of the installation and assembly play as well as certain tolerances as far as possible, but did not know how to influence the voltage profiles in the perforated disks.
- a connecting device for connecting horizontal and vertical framework elements made of aluminum in which a four-armed connecting part produced in a non-cutting molding process has arms, the vertical thickness of which decreases towards the outside.
- special support surfaces for the attachment of fastening shoes are formed on the connecting part. Outside open spaces are left between the arms.
- the arms have radial recesses for the insertion of wedges, the vertical surfaces of which are wedge-shaped and partly rounded.
- the outward boundary with the greatest radial distance from the center each recess is also designed as a partial cone.
- ribs and profiles are formed. No horizontal pipes can be connected in the diagonal areas.
- a connecting device is known from EP-A-0 289 825, the perforated disk of which has a collar-like edge and the connecting elements of which are of a different design.
- the holes in the perforated discs have a trapezoidal shape with rounded edges in the acute-angled corners of the straight-line hole boundaries facing the center with the smallest possible radius. It can be seen from this that optimization of the stress relationships is not part of the content of the disclosure of this document.
- the object of the invention is to achieve improvements in the areas of such perforated disks which are important for the propagation of force, transmission and the course of the tension, with their essential features dealt with in advance in order to increase the permissible clamping forces and payloads by suitable design.
- Edge areas and the introduction of the forces into the perforated disk and the transfer into the handle can, however, also be used in a somewhat modified form, but the wedge contact surface remains in the intended form and the rest of the lines run continuously and without kinks.
- a punched perforated disk made of light metal with significantly improved load conditions can be produced without additional effort.
- the perforated disc 10 has an outer, cylindrically delimited edge 11 with the diameter 12, which is 124 mm in the designs of a particularly proven design.
- the perforated disc 10 has a thickness 14, which is 10 mm in the proven design.
- the perforated disc 10 also has a central bore 15 which has a diameter 16.
- the diameter 16 is 48.8 mm in a tried-and-tested version and fits exactly on corresponding tubes that are to be used for supports and supports as well as other scaffolding elements.
- the perforated disk is made of light metal, for example an Al-Mg-Si alloy, and can be punched out from corresponding plates. It is attached to the pipes in a suitable manner and fastened, for example, by welding. However, other types of fastening such as shrinking, crimping, gluing or other deformation and fastening techniques are also to be used.
- the perforated disc 10 has two different types of wedge holes.
- There are larger wedge holes 20 which are located opposite one another in the diagonals and which are delimited by two part-circle-hole walls 21 and 22 running on circular sections and two radial edges 23.1 and 23.2 and in the corners with the corner Radius 24 are rounded.
- the inner part-circle-hole wall 21 of the wedge holes 20 runs at a distance 17 from the inner wall 15.1 of the central bore 15, which is, for example, about 5.6 mm, so that there is an inner boundary circle of diameter 25 with, for example, 60 mm .
- the outer part-circle-hole wall 22 runs on a wedge contact circle, the diameter 26 of which is 100 mm in the selected exemplary embodiment.
- the outer part-circle-hole walls 22 represent the wedge contact surfaces of the large holes, which make it possible to connect corresponding connection heads with wedges at angles which are not strictly specified, which is in particular at 45 ° to the other connections for diagonal bars, but in the case of oblique mounting and additional elements is also possible at other angles.
- Such wedge holes 20 have always been used in the same form.
- the angular range that the hole occupies is indicated by 27 and is approximately 40 °, the remaining angle 28 to the main axes 29.1 and 29.2 being 25 °, so that the large wedge holes 20 run symmetrically over the diagonal.
- the small wedge holes 30 important for the invention have a special shape.
- the outer wedge contact surface 31 is designed as a tangent or chord in the wedge contact circle 26, the differences between the chord and tangent not being important because of the shortness of the distance.
- the wedge contact surface 31 has a width 32, which in the exemplary embodiment is approximately 6 to 6.5 mm, in any case as wide as the thickness of conventional wedges plus an assembly and compensation play of approximately 0.5 to 1 mm.
- the radial hole depth 33 corresponds the hole depth of the large wedge holes 20, but the limitation shape is chosen here in a special way.
- the entire hole boundary 35 or contour in the embodiment according to the invention has the shape of a continuously curving curve which is symmetrical to the radius running through the centers of the wedge contact surfaces 31 and forming the two main axes 29.1 and 29.2.
- the result is approximately a pear shape which has an almost cylindrical region 36 of smaller diameter facing the central bore 15 or the stem inserted therein and two side regions 37/38 which adjoin continuously with larger radii and which are of the same overall shape. You go in the corners 39 in the wedge contact surface 31 relatively sharp with an obtuse angle.
- this area is, however, of a much larger diameter than the inner areas, there is sufficient accumulation of material in the wedge-like, diverging fixed areas 42, so that the internal stresses are low even with high clamping forces.
- less material is available in the areas 41 closer to the center, which is why any peak effects that occur with previous shapes are significantly more critical of the stress curve and thus the material loads impact.
- Such disadvantageous peak effects are now completely avoided by the kink-free shape in the areas 41 of low material accumulation.
- the new perforated disc 10 according to the invention thereby allows the introduction of significantly larger wedge support forces on the wedge contact surfaces 31, which are taken up in critical places without the risk of breakage, so that the scaffolding is also subjected to higher loads in the light metal version without the risk of inadmissible deformations or breaks can be.
- the perforated disc (10) has a central bore (15) for the stem and large known wedge holes (20) and approximately pear-shaped new wedge holes (30) with wedge contact surfaces (31).
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Dowels (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
- Drilling Tools (AREA)
- Soil Working Implements (AREA)
- Tents Or Canopies (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Surgical Instruments (AREA)
- Air Bags (AREA)
- Bolts, Nuts, And Washers (AREA)
- Movable Scaffolding (AREA)
- Ladders (AREA)
Abstract
Description
Die Erfindung betrifft eine Verbindungsvorrichtung für Gerüstelemente, mit wenigstens einer Lochscheibe, wenigstens einem Anschlußkopf, wenigstens einem Durchsteck-Keil, wobei die Lochscheibe
- . auf vertikalen Gerüstelementen, wie Stielen, Stützen, Zwischenteilen, Sonderbauteilen befestigt ist,
- . zum Anschluß von keilförmig zulaufend ausgebildeten Anschlußköpfen dient,
- . und verschieden große Keil-Löcher für die Durchsteck-Keilen aufweist,
. deren kleinere Keil-Löcher am Außenumfang eine ebene, in der Einbaulage vertikale Keilanlagefläche aufweisen,- . die nur um das Einbauspiel breiter als die Dicke des jeweils zugeordneten Durchsteck-Keiles ist und
- . deren restliche Begrenzungen Wölbungen aufweisen.
- . is attached to vertical scaffolding elements, such as stems, supports, intermediate parts, special components,
- . is used to connect wedge-shaped connection heads,
- . and has wedge holes of different sizes for the push-through wedges,
. whose smaller wedge holes on the outer circumference have a flat, in the installed position vertical wedge contact surface,- . which is only wider by the installation clearance than the thickness of the respective push-through wedge and
- . the rest of which have curvatures.
Aus DE-PS 24 49 124 C3 sind Verbindungsvorrichtungen für Gerüstelemente mit Lochscheiben, Anschlußköpfen und Keilen bekannt. Für solche Verbindungsvorrichtungen werden hochfeste Lochscheiben benötigt, wobei an dem jeweils nach außen zu liegenden Lochrand eine Keilanlagefläche gebildet ist, an der sich der Keil abstützt, während es für die genaue Positionierung auf den inneren Rand des Keil-Loches nicht ankommt. Für eine gut ausgerichtete Montage ist es besonders sinnvoll, den Anlagebereich von wenigstens einzelnen Keilverbindungen auch winkelmäßig genau zu begrenzen. Das wird mit den aus der vorgenannten Patentschrift ersichtlichen Mitteln erreicht. Lochscheiben mit entsprechenden Keil-Löchern, und zwar wechselweise kleinen und großen, wie aus den Zeichnungen ersichtlich, haben sich seit 15 Jahren bewährt.From DE-PS 24 49 124 C3 connecting devices for scaffolding elements with perforated disks, connection heads and wedges are known. High-strength perforated disks are required for such connecting devices, a wedge contact surface on which the wedge is supported being formed on the outer edge of the hole, while the precise positioning of the inner edge of the wedge hole is not important. For a well-aligned assembly, it is particularly useful to also precisely limit the contact area of at least individual wedge connections. This is achieved with the means evident from the aforementioned patent specification. Perforated disks with corresponding wedge holes, alternately small and large, as can be seen from the drawings, have proven themselves for 15 years.
Im Zuge der Forderungen nach leichteren Gerüsten, die vor allem für Schnellmontagen bei handwerklichen, aber insbesondere auch bei industriellen Anwendungen ergeben, beispielsweise wenn im Innern von Kesseln, Enstaubungs-, Entgiftungseinrichtungen und dgl. in kurzer Zeit und durch kleine Öffnungen Gerüste eingebracht werden müssen, hat es sich ergeben, daß Gerüstelemente aus Leichtmetall herzustellen sind. Standardisierte Gerüste sind an bestimmte, für alle untereinander austauschbaren Elemente verbindliche Abmessungen gebunden. Deshalb werden die zulässigen Belastungen durch die Materialeigenschaften und die vorgegebenen Abmessungen oft stark begrenzt.In the course of the demands for lighter scaffolding, which result above all for quick assembly in manual, but in particular also in industrial applications, for example if scaffolds have to be introduced in the interior of boilers, dedusting, detoxification devices and the like in a short time and through small openings, it has been found that scaffolding elements are made of light metal. Standardized scaffolding is bound to certain dimensions that are binding for all interchangeable elements. For this reason, the permissible loads are often severely limited by the material properties and the specified dimensions.
Vor allem die Bereiche um die Keil-Löcher stellen die Kraftangriffs- und Übertragungsbereiche dar, die für eine Optimierung der Spannkräfte und Nutzlasten ausgenutzt werden können. Die grundsätzliche Verwendung von Leichtmetall für derartige Gerüste ist z. B. in DE-OS 37 02 057 A1 bekannt geworden. Dabei hat man aber stets die alten Lochformen verwendet und nur das Einbau- und Montagespiel sowie gewisse Toleranzen im Rahmen des Möglichen auszunutzen versucht, nicht jedoch die Spannungsverläufe in den Loch-Scheiben zu beeinflussen gewußt.Above all, the areas around the wedge holes represent the force application and transmission areas that can be used to optimize the clamping forces and payloads. The basic use of light metal for such scaffolding is such. B. become known in DE-OS 37 02 057 A1. However, one always used the old hole shapes and only tried to take advantage of the installation and assembly play as well as certain tolerances as far as possible, but did not know how to influence the voltage profiles in the perforated disks.
Aus FR- 2 553 456 A1 ist eine Verbindungsvorrichtung für das Verbinden horizontaler und vertikaler Gerüstelemente aus Aluminium bekannt, bei der ein vierarmiges, in einem spanlosen Formverfahren hergestelltes Verbindungsteil Arme aufweist, deren vertikale Dicke nach außen hin abnimmt. Im Bereich des Rohres sind an dem Verbindungsteil spezielle Abstützflächen für die Anlage von Befestigungsschuhen ausgebildet. Zwischen den Armen sind äußere Freiräume belassen. Die Arme haben für das Durchstecken von Keilen radiale Ausnehmungen, deren Vertikalflächen keilförmig und zum Teil gerundet gestaltet sind.Im Bereich des vertikalen Rohres sind die Ausnehmungen jeweils mit einem Halbkegelstumpf gebildet, der mit einem Knick in die Seitenwände der Ausnehmungsbegrenzung übergeht. Die nach außen, mit dem größten Radialabstand zum Zentrum liegende Endbegrenzung jeder Ausnehmung ist ebenfalls als Teilkegel ausgebildet. Neben den Ausnehmungen sind Rippen und Profilierungen gebildet. In den Diagonalbereichen können keine Horizontalrohre angeschlossen werden. Eine glatte, vertikale, gerade und dadurch große Flächenkräfte aufnehmende Keilanlagefläche ist nicht vorgesehen. Aufgrund der ganzen Bauform des Profilteiles ergibt sich ein anderer Kraftverlauf als bei ebenen Scheiben, welche auch zwischen den Keillöchern für den untereinander rechtwinkligen Anschluß von Horizontalelementen weitere, in Zwischenbereichen liegende Keillöcher für den Anschluß von Diagonalstäben benötigen.From FR-2 553 456 A1 a connecting device for connecting horizontal and vertical framework elements made of aluminum is known, in which a four-armed connecting part produced in a non-cutting molding process has arms, the vertical thickness of which decreases towards the outside. In the area of the tube, special support surfaces for the attachment of fastening shoes are formed on the connecting part. Outside open spaces are left between the arms. The arms have radial recesses for the insertion of wedges, the vertical surfaces of which are wedge-shaped and partly rounded. The outward boundary with the greatest radial distance from the center each recess is also designed as a partial cone. In addition to the recesses, ribs and profiles are formed. No horizontal pipes can be connected in the diagonal areas. There is no provision for a smooth, vertical, straight wedge contact surface which absorbs large surface forces. Due to the entire design of the profile part, there is a different force profile than with flat panes, which also require additional wedge holes in the intermediate areas for the connection of diagonal bars between the wedge holes for the perpendicular connection of horizontal elements.
Aus EP-A-0 289 825 ist eine Verbindungsvorichtung bekannt, deren Lochscheibe mit kragenartigem Rand und deren Anschlußelemente andersartig ausgebildet sind. Die Löcher der Lochscheiben haben Trapezgestalt mit Ausrundungen in den dem Zentrum zugewandten spitzwinkligen Ecken der geradlinigen Lochbegrenzungen mit dem kleinstmöglichen Radius. Daraus ist ersichtlich, daß Optimierung der Spannungsverhältnisse nicht zum Inhalt der Offenbarung dieser Druckschrift gehört.A connecting device is known from EP-A-0 289 825, the perforated disk of which has a collar-like edge and the connecting elements of which are of a different design. The holes in the perforated discs have a trapezoidal shape with rounded edges in the acute-angled corners of the straight-line hole boundaries facing the center with the smallest possible radius. It can be seen from this that optimization of the stress relationships is not part of the content of the disclosure of this document.
Der Erfindung liegt die Aufgabe zugrunde, in den für die Kraftausbreitung, -Übertragung und den Spannungsverlauf wichtigen Bereichen derartiger, mit ihren wesentlichen Merkmalen vorn behandelter Loch-Scheiben zur Erhöhung zulässiger Spannkräfte und Nutzlasten durch geeignete Formgestaltung Verbesserungen zu erzielen.The object of the invention is to achieve improvements in the areas of such perforated disks which are important for the propagation of force, transmission and the course of the tension, with their essential features dealt with in advance in order to increase the permissible clamping forces and payloads by suitable design.
Erfindungsgemäß ist vorgesehen,
- daß die gesamten Lochbegrenzungen der kleinen Keil-Löcher
. mit Ausnahme der Keilanlagefläche einen kontinuierlich knickfrei durchlaufenden Kurvenzug bilden,
- . der zum durch die Mitte der Keilanlagefläche verlaufenden Radius symmetrisch ist
- . und etwa birnenförmig mit einem dem Zentrum zugewandten, nahezu zylindrischen Innenbereich ausgebildet ist,
. der kontinuierlich in Seitenbereiche mit Radien übergeht, die größer sind als im Innenbereich.According to the invention,
- That the entire hole boundaries of the small wedge holes
. with the exception of the wedge contact surface, form a continuously curved curve,
- . which is symmetrical to the radius running through the center of the wedge contact surface
- . and is approximately pear-shaped with an almost cylindrical inner region facing the center,
. that continuously merges into side areas with radii that are larger than inside.
Während die bisherigen Loch-Ecken auch im Nahbereich der Stiele scharfkantig oder nur mit Ausrundungen mit ganz kleinem Radius ausgebildet wurden, vor allem weil man die Keile durch die Lochränder führen wollte, ist man nun nach langer Zeit entgegen der bisherigen Annahme zu der entscheidenden Erkenntnis gelangt, daß man durch Verbesserung der Lochrandgestaltung im Nahbereich der Stiele, dort, wo die Querschnitte am geringsten sind, durch Vermeidung spitzer Ecken eine für die Leichtmetall-Ausführung bedeutende Verbesserung erzielen kann, wenn man eine knickfreie, mit geeignet wesentlich größeren, an die räumlichen Verhältnisse angepaßten Radien gestaltete Lochrandausbildung wählt. Diese hat dabei eine etwa birnenförmige Gestalt. Je nach Gestaltung der Randbereiche und des Einleitens der Kräfte in die Lochscheibe und des Überleitens in den Stiel kann jedoch auch eine davon etwas abgewandelte Form benutzt werden, wobei jedoch die Keilanlagefläche in der vorgesehenen Form verbleibt und die übrige Linienführung kontinuierlich und knickfrei durchläuft. So läßt sich eine gestanzte aus Leichtmetall bestehende lochscheibe mit erheblich verbesserten Belastungsverhältnissen ohne Zusatzaufwand herstellen. Weitere Einzelheiten, Vorteile, Merkmale und Gesichtspunkte der Erfindung ergeben sich auch aus dem nachfolgenden, anhand der Zeichnungen abgehandelten Beschreibungsteil.While the previous hole corners were also sharp-edged in the vicinity of the handles or only with rounded corners with a very small radius, mainly because you wanted to wedge the wedges through the hole edges, contrary to the previous assumption, you have now come to the decisive conclusion that by improving the hole edge design in the vicinity of the stalks, where the cross-sections are the smallest, by avoiding sharp corners, a significant improvement can be achieved for the light metal version if one has a kink-free, with suitably much larger, spatial conditions adapted radius design designed hole edge training. This has an approximately pear-shaped shape. Depending on the design of the Edge areas and the introduction of the forces into the perforated disk and the transfer into the handle can, however, also be used in a somewhat modified form, but the wedge contact surface remains in the intended form and the rest of the lines run continuously and without kinks. Thus, a punched perforated disk made of light metal with significantly improved load conditions can be produced without additional effort. Further details, advantages, features and aspects of the invention also emerge from the following description part, which is dealt with on the basis of the drawings.
Ein Ausführungsbeispiel der Lochscheibe wird nachfolgend anhand der Zeichnungen erläutert.An embodiment of the perforated disc is explained below with reference to the drawings.
Es zeigen:
- Fig. 1
- Die Draufsicht auf eine Lochscheibe
und
- Fig. 2
- einen Vertikalschnitt längs der Linie 2-2 in Fig.1.
- Fig. 1
- The top view of a perforated disc
and
- Fig. 2
- a vertical section along the line 2-2 in Fig.1.
Die Lochscheibe 10 hat einen äußeren, zylindrisch begrenzten Rand 11 mit dem Durchmesser 12, der bei den Ausführungen einer besonders bewährten Gestaltung 124 mm beträgt. Die Lochscheibe 10 hat eine Dicke 14, die in der bewährten Ausführung 10 mm beträgt. Die Lochscheibe 10 hat weiter eine Zentralbohrung 15, die einen Durchmesser 16 hat. Der Durchmesser 16 beträgt bei einer bewährten Ausführung 48,8 mm und paßt genau auf entsprechende Rohre, die für Stiele und Stützen sowie sonstige Gerüstelemente zu verwenden sind. Die Lochscheibe besteht aus Leichtmetall, beispielsweise einer Al-Mg-Si-Legierung und kann aus entsprechenden Platten ausgestanzt sein. Sie wird auf die Rohre in geeigneter Weise aufgesteckt und beispielsweise durch Schweißen befestigt. Es sind jedoch auch andere Befestigungsarten, wie Aufschrumpfen, Einbördeln, Einkleben oder sonstige Verformungs- und Befestigungstechniken anzuwenden.The
Die Lochscheibe 10 hat zwei verschiedene Typen von Keil-Löchern. Dabei gibt es größere, in den Diagonalen jeweils einander gegenüberliegende Keil-Löcher 20, die von zwei auf Kreisabschnitten verlaufenden Teil-Kreis-Loch-Wänden 21 und 22 sowie zwei Radial-Rändern 23.1 und 23.2 begrenzt sind und in den Ecken mit dem Eck-Radius 24 ausgerundet sind. Die innere Teil-Kreis-Loch-Wand 21 der Keil-Löcher 20 verläuft in einem Abstand 17 zur Innenwand 15.1 der Zentralbohrung 15, der beispielsweise etwa 5,6 mm beträgt, so daß sich ein innerer Begrenzungskreis vom Durchmesser 25 mit beispielsweise 60 mm ergibt.The
Die äußere Teil-Kreis-Loch-Wand 22 verläuft auf einem Keilanlagekreis, dessen Durchmesser 26 im gewählten Ausführungsbeispiel 100 mm beträgt. Die äußeren Teil-Kreis-Loch-Wände 22 stellen die Keilanlageflächen der großen Löcher dar, die es gestatten, entsprechende Anschlußköpfe mit Keilen unter nicht genau zwingend festgelegten Winkeln anzuschließen, was insbesondere unter 45° zu den übrigen Anschlüssen für Diagonalstäbe, aber bei schiefwinkligen Montagen und Zusatzelementen auch unter anderen Winkeln möglich ist.The outer part-circle-hole wall 22 runs on a wedge contact circle, the
Solche Keil-Löcher 20 sind bisher schon stets in gleicher Form benutzt worden. Dabei ist der Winkelbereich, den das Loch einnimmt mit 27 angegeben und er beträgt etwa 40°, wobei der Restwinkel 28 zu den Hauptachsen 29.1 und 29.2 25° beträgt, so daß die großen Keil-Löcher 20 symmetrisch über die Diagonale verlaufen.Such wedge holes 20 have always been used in the same form. The angular range that the hole occupies is indicated by 27 and is approximately 40 °, the remaining
Die für die Erfindung wichtigen kleinen Keil-Löcher 30 haben eine besondere Form. Dabei ist die äußere Keilanlagefläche 31 als Tangente oder Sehne in dem Keilanlagekreis 26 ausgebildet, wobei es auf die Unterschiede zwischen Sehne und Tangente wegen der Kürze der Strecke nicht ankommt. Die Keilanlagefläche 31 hat eine Breite 32, die beim Ausführungsbeispiel etwa 6 bis 6,5 mm beträgt, auf jeden Fall so breit ist, wie die Dicke üblicher Keile zuzüglich eines Montage- und Ausgleichspiels von etwa 0,5 bis 1 mm. Die radiale Lochtiefe 33 entspricht der Lochtiefe der großen Keil-Löcher 20, jedoch ist die Begrenzungsform hier in besonderer Weise gewählt. Während die bisherigen der Zentrierung dienenden Keil-Löcher mit leicht gewölbten, etwa radial liegenden Längswänden und einer inneren tangential oder als Sehne liegenden, scharfkantig abgeknickten Kontur ausgebildet waren, hat die gesamte Lochbegrenzung 35 oder Kontur bei der erfindungsgemäßen Ausführung die Form eines kontinuierlich knickfrei durchlaufenden Kurvenzuges, der zum durch die Mitten der Keilanlageflächen 31 verlaufenden, die beiden Hauptachsen 29.1 und 29.2 bildenden Radius, symmetrisch ist. Es ergibt sich etwa eine Birnenform, die einen der Zentralbohrung 15 bzw. dem darin steckenden Stiel zugewandten, nahezu zylindrischen Bereich 36 kleineren Durchmessers und zwei mit größeren Radien kontinuierlich anschließende Seitenbereiche 37/38 aufweist, die insgesamt gleich geformt sind. Sie gehen in den Ecken 39 in die Keilanlagefläche 31 relativ scharfkantig mit einem stumpfen Winkel über. In Anbetracht dessen, daß sich dieser Bereich jedoch auf einem wesentlich größeren Durchmesser befindet, als die Innenbereiche ist hier jedoch hinreichend Werkstoff-Ansammlung in den keilartig auseinander strebenden festen Bereichen 42 vorhanden, so daß hier auch bei hohen Spannkräften die inneren Spannungen gering werden. In den der Mitte näheren Bereichen 41 steht jedoch weniger Material zur Verfügung, weshalb evtl. auftretende Spitzenwirkungen sich bei bisherigen Formen wesentlich kritischer auf den Spannungsverlauf und damit die Materialbelastungen auswirkten. Solche nachteiligen Spitzenwirkungen sind durch die knickfreie Form in den Bereichen 41 geringer Materialansammlung nunmehr völlig vermieden. Die neue Lochscheibe 10 nach der Erfindung gestattet dadurch die Einleitung wesentlich größerer Keilstützkräfte auf die Keilanlageflächen 31, die ohne die Gefahr des Bruches in kritischen Stellen aufgenommen werden, so daß die Gerüste auch in Leichtmetall-Ausführung ohne die Gefahr von unzulässigen Verformungen oder Brüchen höher belastet werden können.The small wedge holes 30 important for the invention have a special shape. The outer
Zusammengefaßt kann die Erfindung auch wie folgt beschrieben werden:In summary, the invention can also be described as follows:
Die Lochscheibe (10) hat eine Zentralbohrung (15) für den Stiel und große bekannte Keil-Löcher (20) sowie etwa birnenförmig geformte neue Keil-Löcher (30) mit Keilanlageflächen (31).The perforated disc (10) has a central bore (15) for the stem and large known wedge holes (20) and approximately pear-shaped new wedge holes (30) with wedge contact surfaces (31).
- 1010th
- LochscheibePerforated disc
- 1111
- Randedge
- 1212
- Durchmesserdiameter
- 1414
- Dicke von 10Thickness of 10
- 1515
- ZentralbohrungCentral bore
- 15.115.1
- Innenwand von 15Inner wall of 15
- 1616
- Durchmesserdiameter
- 1717th
- Abstanddistance
- 2020th
- Keil-LochWedge hole
- 2121
- Teil-Kreis-Loch-WandPart-circle-hole-wall
- 2222
- ""
- 23.123.1
- Radial-RandRadial edge
- 23.223.2
- ""
- 2424th
- Eck-RadiusCorner radius
- 2525th
- Durchmesserdiameter
- 2626
- KeilanlagekreisWedge system
- 2727
- WinkelbereichAngular range
- 2828
- RestwinkelResidual angle
- 29.129.1
- Hauptachse/RadiusMajor axis / radius
- 29.229.2
- ""
- 3030th
- Keil-LochWedge hole
- 3131
- KeilanlageflächeWedge contact surface
- 3232
- Breite von 31Width of 31
- 3333
- radiale Lochtieferadial hole depth
- 3535
- LochbegrenzungHole limitation
- 3636
- zylindrischer Bereichcylindrical area
- 3737
- SeitenbereichSide area
- 3838
- ""
- 3939
- Eckecorner
- 4141
- BereichArea
- 4242
- ""
Claims (1)
- Connecting device for scaffolding elements, comprising- at least one perforated disc (10̸),- at least one connecting head,- at least one push-through wedge,wherein the perforated disc. is attached to perpendicular scaffolding elements, such as poles, supports, intermediate elements, special assembly components,. serves the connection of connecting heads which are arranged in the shape of a wedge,. and comprises differently sized wedge holes (20̸, 30̸) for the push-through wedges,characterised in that
. the smaller wedge holes (30̸) having at the external periphery a plane wedge-abutment surface (31) of perpendicular disposition when inserted,. which is broader (32) than the thickness of a respective associated push-through wedge by only the assembly play, and. the remaining limits of which have curvatures,
- that the entire hole limits (35) of the small wedge holes (30̸). with the exception of the wedge-abutment surface (31) form a continuously fold-free extending curvature,. which is symmetrical to the radius (29.1, 29.2) which extends through the centre of the wedge-abutment surface (31),. and which is arranged to be approximately pear-shaped with a virtually cylindrically inner area (36) oriented towards the centre (15),
. which continuously merges into lateral areas (37, 38) with radii which are larger than in the inner area.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3909809A DE3909809A1 (en) | 1989-03-24 | 1989-03-24 | PERFORMANCE DISC FOR CONNECTING DEVICES FOR SCAFFOLDING ELEMENTS |
DE3909809 | 1989-03-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0389933A1 EP0389933A1 (en) | 1990-10-03 |
EP0389933B1 true EP0389933B1 (en) | 1993-06-02 |
Family
ID=6377167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90105278A Expired - Lifetime EP0389933B1 (en) | 1989-03-24 | 1990-03-21 | Apertured locking disc for connecting devices of scaffolding elements |
Country Status (12)
Country | Link |
---|---|
US (1) | US5046879A (en) |
EP (1) | EP0389933B1 (en) |
JP (1) | JPH0810631Y2 (en) |
AT (1) | ATE90135T1 (en) |
AU (1) | AU630437B2 (en) |
CA (1) | CA2012953C (en) |
DE (2) | DE3909809A1 (en) |
DK (1) | DK0389933T3 (en) |
ES (1) | ES2042109T3 (en) |
FI (1) | FI86211C (en) |
NO (1) | NO174400C (en) |
PT (1) | PT8346U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008006911A1 (en) | 2008-01-24 | 2009-07-30 | Wilhelm Layher Verwaltungs-Gmbh | For the construction of a frame support, a support frame and / or a shoring tower certain vertical frame |
WO2010045693A2 (en) | 2008-10-21 | 2010-04-29 | Marc Keersmaekers | A scaffold, upright and connecting element for a scaffold, and other scaffolding elements |
DE202010013128U1 (en) | 2010-12-15 | 2011-03-03 | Wilhelm Layher Verwaltungs-Gmbh | Connecting head device for connection to a perforated disc of a scaffolding handle or for coupling a plurality of perforated discs scaffolding posts |
WO2011100941A1 (en) | 2010-02-19 | 2011-08-25 | Wilhelm Layher Verwaltungs-Gmbh | Scaffold and methods for installing or removing such a scaffold |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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CA2101577C (en) * | 1992-07-31 | 2005-06-07 | Dale L. Taipale | Modular portable stage system |
DE19726950C2 (en) * | 1997-06-25 | 1999-12-23 | Plettac Ag | Rosette-shaped holding device for scaffolding elements |
DE19844612A1 (en) * | 1998-09-29 | 2000-03-30 | Plettac Ag | Connector for fastening a horizontal or diagonal member to a vertical scaffolding pole with a webbed surface |
DE19918131A1 (en) * | 1999-04-21 | 2000-10-26 | Plettac Ag | Holder for vertical scaffold tube, to which horizontal or diagonal scaffold elements are fixed; has |
DE19925707B4 (en) * | 1999-06-07 | 2007-04-12 | Günter Rux GmbH | Modular frame made of pipes |
ITBS20060029A1 (en) * | 2006-02-17 | 2007-08-18 | Nyco System S R L | FASTENING METHOD OF A CONNECTION FLANGE OF THE CONNECTION CROSSES BETWEEN THE UPRIGHTS OF A SCAFFOLD TO THE TUBE OF THE SAME COLUMN |
DE202006015586U1 (en) | 2006-10-11 | 2008-02-21 | Wilhelm Layher Verwaltungs-Gmbh | Vertical frame element made of metal |
DE202009008127U1 (en) | 2009-06-12 | 2009-08-27 | G.M.B. Trade And Service Company Ltd. | Truss modular scaffold system |
US9206618B2 (en) | 2012-03-16 | 2015-12-08 | Honeywell International Inc. | Edge protection system using cantilevered counterweight |
CN104358397A (en) * | 2014-10-30 | 2015-02-18 | 无锡市安捷脚手架有限公司 | Fixed disk and upright tube separated disk-type scaffold |
DE202017102638U1 (en) | 2017-05-03 | 2017-09-21 | Hennadii Oleksandrovych Rybak | Fisherman's three-dimensional mobile modular scaffolding trade fair system |
JP6729881B2 (en) * | 2018-06-21 | 2020-07-29 | 戸田建設株式会社 | Binding device on scaffolding |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2449124C3 (en) * | 1974-10-16 | 1980-01-03 | Eberhard 7129 Gueglingen Layher | Connection device for scaffolding elements |
US4493578A (en) * | 1982-09-30 | 1985-01-15 | Harsco Corporation | Scaffolding connector and system |
FR2553456B1 (en) * | 1983-10-18 | 1986-01-24 | Roux Marcel | DIRECTIONAL ASSEMBLY DEVICE BETWEEN THE HORIZONTAL AND VERTICAL TUBULAR ELEMENTS OF A SCAFFOLD |
DE3702057A1 (en) * | 1987-01-24 | 1988-08-04 | Langer Ruth Geb Layher | SCAFFOLDED WITH CONNECTING DEVICES |
DE3715296A1 (en) * | 1987-05-08 | 1988-11-17 | Huennebeck Gmbh | NODE FOR SCAFFOLDINGS OD. DGL. |
-
1989
- 1989-03-24 DE DE3909809A patent/DE3909809A1/en not_active Withdrawn
-
1990
- 1990-03-21 EP EP90105278A patent/EP0389933B1/en not_active Expired - Lifetime
- 1990-03-21 AT AT90105278T patent/ATE90135T1/en not_active IP Right Cessation
- 1990-03-21 DK DK90105278.7T patent/DK0389933T3/en active
- 1990-03-21 ES ES199090105278T patent/ES2042109T3/en not_active Expired - Lifetime
- 1990-03-21 DE DE9090105278T patent/DE59001587D1/en not_active Expired - Lifetime
- 1990-03-22 FI FI901433A patent/FI86211C/en not_active IP Right Cessation
- 1990-03-23 AU AU52170/90A patent/AU630437B2/en not_active Ceased
- 1990-03-23 CA CA002012953A patent/CA2012953C/en not_active Expired - Fee Related
- 1990-03-23 JP JP1990029185U patent/JPH0810631Y2/en not_active Expired - Fee Related
- 1990-03-23 NO NO901362A patent/NO174400C/en not_active IP Right Cessation
- 1990-03-26 US US07/498,540 patent/US5046879A/en not_active Expired - Lifetime
-
1991
- 1991-09-20 PT PT8346U patent/PT8346U/en not_active IP Right Cessation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008006911A1 (en) | 2008-01-24 | 2009-07-30 | Wilhelm Layher Verwaltungs-Gmbh | For the construction of a frame support, a support frame and / or a shoring tower certain vertical frame |
WO2009092340A1 (en) | 2008-01-24 | 2009-07-30 | Wilhelm Layher Verwaltungs-Gmbh | Vertical frame intended for the construction of a frame stanchion, a supporting frame and/or a supporting frame tower |
WO2010045693A2 (en) | 2008-10-21 | 2010-04-29 | Marc Keersmaekers | A scaffold, upright and connecting element for a scaffold, and other scaffolding elements |
WO2011100941A1 (en) | 2010-02-19 | 2011-08-25 | Wilhelm Layher Verwaltungs-Gmbh | Scaffold and methods for installing or removing such a scaffold |
DE102010000472A1 (en) | 2010-02-19 | 2011-08-25 | Wilhelm Layher Verwaltungs-GmbH, 74363 | Scaffolding and method for mounting or dismounting such scaffolding |
DE202010013128U1 (en) | 2010-12-15 | 2011-03-03 | Wilhelm Layher Verwaltungs-Gmbh | Connecting head device for connection to a perforated disc of a scaffolding handle or for coupling a plurality of perforated discs scaffolding posts |
EP2466034A1 (en) | 2010-12-15 | 2012-06-20 | Wilhelm Layher Verwaltungs-GmbH | Connection head device for connection to an apertured disk of a scaffolding post or for coupling multiple scaffolding posts with apertured disks |
Also Published As
Publication number | Publication date |
---|---|
NO901362D0 (en) | 1990-03-23 |
JPH0810631Y2 (en) | 1996-03-29 |
PT8346T (en) | 1992-03-31 |
FI901433A0 (en) | 1990-03-22 |
AU630437B2 (en) | 1992-10-29 |
AU5217090A (en) | 1990-09-27 |
CA2012953C (en) | 1999-08-24 |
FI86211C (en) | 1992-07-27 |
DK0389933T3 (en) | 1993-10-04 |
FI86211B (en) | 1992-04-15 |
NO174400C (en) | 1994-04-27 |
NO174400B (en) | 1994-01-17 |
JPH02141052U (en) | 1990-11-27 |
DE59001587D1 (en) | 1993-07-08 |
ES2042109T3 (en) | 1993-12-01 |
ATE90135T1 (en) | 1993-06-15 |
CA2012953A1 (en) | 1990-09-23 |
EP0389933A1 (en) | 1990-10-03 |
DE3909809A1 (en) | 1990-09-27 |
US5046879A (en) | 1991-09-10 |
PT8346U (en) | 1994-08-31 |
NO901362L (en) | 1990-09-25 |
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