EP1947262B1 - Extension for supports used in concrete formwork and shoring systems - Google Patents
Extension for supports used in concrete formwork and shoring systems Download PDFInfo
- Publication number
- EP1947262B1 EP1947262B1 EP07405015.4A EP07405015A EP1947262B1 EP 1947262 B1 EP1947262 B1 EP 1947262B1 EP 07405015 A EP07405015 A EP 07405015A EP 1947262 B1 EP1947262 B1 EP 1947262B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extension piece
- extension
- connecting part
- beams
- holes
- 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.)
- Not-in-force
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Classifications
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- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
- E04G1/12—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means comprising members of special, e.g. composite, cross-section or with lugs or the like or lateral apertures for supporting or attaching other members
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- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/18—Scaffolds primarily resting on the ground adjustable in height
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- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
Definitions
- the present invention relates to an extension part for a carrier in formwork and scaffolding construction according to the preamble of claim 1.
- EP 1 650 376 A describes an extension part according to the preamble of claim 1.
- a second possibility, especially with this carrier is to insert a connecting part between the lateral bars in the carrier and to lock the existing transverse holes by means of inserted bolts.
- this solution has less stability and strength at the joint, if not excessively strong dimensioned connection plates are used, which are not only expensive, but also correspondingly difficult.
- this type of connection also has a certain amount of play.
- An object of the present invention is therefore to provide extension elements, in particular connecting element for engaging carriers and variable-length attachment heads, which provide a better transfer of forces to the carrier or between the carriers.
- connecting element for connecting two carriers is specified in claim 1.
- the further claims indicate preferred embodiments, connecting parts sets with such a connecting part and carrier for use with such a connecting part or connecting piece set.
- the connecting part according to the invention is based on the idea that it is designed in such a way that it can be inserted into the lateral bars of a carrier. It is possible to adapt its dimensions quite accurately to the available cross-section, so that a result despite the massive design almost backlash in the spar. Since the connecting part has almost the same cross section as the profile of the support beams and sits in the same place in the carrier as the spars, only a slightly higher loadable design (eg stronger material, stronger material) is sufficient to the same stability even at the junction between two carriers as with the wearers themselves.
- a special locking member is proposed in a preferred embodiment, namely a bolt which is conical at both ends in the same sense and in the middle part has a thread.
- the matching connecting part also has a threaded hole in the interior. Its walls as well as the corresponding holes in the bars of the carrier are aligned conically. The locking member can thus be inserted through the holes in the spars and aligned holes arranged in the connector and screwed tight in the thread of the connecting part without play.
- Fig. 1 two carriers 1 are shown, beisp. according to the mentioned patent CH-A-695386 , In the context of the invention is important that the carrier each have two spars 2, which are interconnected via plates 3. Essential for the invention is that the spars are 2 hollow sections, in this case with a rectangular cross-section.
- a connector 5 For connecting the two carriers 1 to a longer carrier, a connector 5 is inserted.
- the connector 5 corresponds in its outer shape of the inner contour of the spars second (please refer Fig. 2 ).
- the connector 5 are possible backlash in the bars 2, but still sufficiently easy to insert or pull out, so that this can happen on the spot (eg on a construction site), the width 7 is selected smaller by a few millimeters than the corresponding internal dimension the spars 2.
- the broad sides 9 an array of elevations 10, in the example extending in the longitudinal direction, embossed into the material webs.
- the connectors 5 In comparison with a connecting part, which is inserted into the inner space 12, the connectors 5 thus sit directly and in cross-section only slightly reduced in the places where the forces (tensile, compressive and bending forces) are transmitted in the carrier.
- a connector that would be located in the interior 12 would need to be made so solid for a similar load-bearing connection (e.g., at least 80% of the carrier load capacity) that it would almost completely fill the interior 12.
- the interior i. the transverse thereto through openings and openings, a function in the establishment of formwork and support structures. A solid connecting part in this interior would impair this function.
- the narrow sides 14 of the connector 5 are with at most little play ( ⁇ 1 mm, usually 0.5 - 0.8 mm) on the inner narrow sides 16 of the spar 2, and it results even with the same material and the same material thickness of connector and Holm an equivalent strength against bending moments.
- the otherwise nearly matching cross-section gives the same result also with regard to compressive forces and in particular tensile forces acting on the connector at the junction.
- connection which in particular can absorb tensile forces, it is necessary to anchor the connectors in the bars 2.
- indissoluble or detachable connections offer.
- As a permanent connection are beisp. Welding, in particular hole welds conceivable.
- Verbolzept i. Bolts that are inserted through aligned holes in the connectors 5 and the spars 2. In the simplest case, they are cylindrical bolts, e.g. Screws, rivets or pin-shaped bolts, which are secured in a suitable manner against falling out. Such bolts are available as standard parts.
- a conical bolt in conjunction with a threaded connection.
- Fig. 2 are shown for receiving the conical bolt 20 first in the spar 2 aligned conical holes 22 (outside) and 23 (inside), wherein the Hole width decreases both within the holes 22, 23 and from hole 22 to 23.
- the connector 5 also has holes 25, 26 matching the holes 22, 23, the diameter of which decreases from one broadside 9 to the other.
- the connector 5 is inserted into the spar 2 in such a way that the larger hole 25 is aligned with the hole 22, whereby the two holes result in a continuous conical opening.
- the hole 26 is aligned with the hole 23, which also results in the inside of the spar an overall conical opening through connector 5 and spar wall. It also follows that the diameter of the holes 22 and 23 or 25 and 26 are each matched to each other, that these said continuous conical openings arise.
- the bolt 20 has, starting from its head end, a first conical section 36, a cylindrical, threaded middle section 38 and then to the end a second conical section 40.
- the diameter of the first conical section is adapted to the holes 22 of the spar and 25 of the connector 5, that of the second conical section 40 corresponding to the hole 23 in the spar and the hole 26 in the connector 5.
- the bolt 20 is screwed into the threaded bore 34 of the metal plate 28 and thereby secured against falling out, at the same time its first portion abuts against the holes 22 (spar 2) and 25 (connector 5) and the second conical portion 40 abuts the holes 23 (spar 2) and 26 (connector 5).
- the conical design of said holes and the bolt sections allows easy insertion of the bolt and yet after tightening a backlash-free connection of connector 5 in the spar 2, whereby the above-mentioned kinking is avoided.
- the diameter of the bolt 20 and corresponding to the holes 22, 23, 25 and 26 has been optimized for maximum strength. Increasing the diameter leads to greater strength of the bolt, but weakens the connector 5.
- Another design factor is the slope of the taper of the sections 36, 40 of the bolt 20, or the holes 22, 23, 25 and 26.
- Preferred is a Konizticianswinkel 45, which is in the transition region between self-locking and loosening of the material used (steel) , At such an angle, no relevant expressing force of the bolt under load and he is still easy to solve again. In a normal structural steel, this angle is about 12 degrees.
- the insertion of the metal plates 28 in the connector 5 can be done once by the fact that the connector composed of two parts or from a part by folding in Formed longitudinally, wherein the metal plates 28 are inserted prior to molding or assembly.
- the metal plates 28 are inserted before joining the parts. If the connector 5 is composed of two parts, the metal plates 28 are inserted before joining the parts. If the connector 5 is formed from only one sheet metal part, this may e.g. are preformed so that the connector 5 is formed to a slot, wherein the slot extends through the bores 25, 26 and is so wide that the metal plates 28 can be pushed through.
- the metal plates 28 may be provided with threaded holes or with an over the entire width extending bore at each of the two ends.
- the metal plates 28 are inserted into the hollow profile of the connector 5, so that the holes in the metal plates 28 are accessible through the holes 32 in the connector 7. Screws are then screwed into the sheet metal plate through the bore 32, with their heads forming the projections 30 of the sheet metal plate.
- a rod can be pushed through, which has a greater length, so that their ends protrude beyond the metal plate 28 and forms the projections 30.
- the rod is then fixed in a suitable manner in the metal plate, e.g. by a weld, a split pin or similar.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Joining Of Building Structures In Genera (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
Die vorliegende Erfindung bezieht sich auf ein Verlängerungsteil für einen Träger im Schalungs- und Traggerüstbau gemäss Oberbegriff des Anspruchs 1.
Im Schalungs- und Gerüstbau werden Träger für verschiedenste Anwendungen gebraucht, wobei sie insbesondere im Traggerüstbau für hohe Belastungen ausgelegt sein müssen. Aus dem Patent
Eine oft vorkommende Anwendung der Träger besteht darin, in einem Gerüst Elemente durch eine schräg verlaufende Strebe gegeneinander abzustützen. Die für solche Streben nötigen Längen können jedoch nicht in dem Raster der Träger verwirklicht werden und erfordern daher, dass an den Trägern längenveränderliche Verbindungsteile angesetzt werden. Gängig sind dabei solche, die durch einen Spindeltrieb verstellt werden können. Diese Spindeltriebe zeigen eine hohe axiale Belastbarkeit in Richtung der Spindel auf, d.h. in der Richtung, in der die Längenveränderung erfolgt und die zugleich die Längsrichtung der Träger darstellt. In der Praxis treten jedoch auch andere Kräfte auf, insbesondere quer zur Spindel, die von den gängigen Spindelköpfen mit geringerer Effizienz aufgenommen werden können. Dies bedeutet, dass die Köpfe für solche Belastungen relativ zu den axialen Kräften stark überdimensioniert werden müssen.An often used application of the carriers is to support elements in a scaffold by an oblique strut against each other. However, the necessary for such struts lengths can not be realized in the grid of the carrier and therefore require that on the carriers variable-length connecting parts are recognized. Common are those that can be adjusted by a spindle drive. These spindle drives exhibit a high axial load capacity in the direction of the spindle, i. in the direction in which the change in length takes place and which at the same time represents the longitudinal direction of the carriers. In practice, however, other forces occur, especially transverse to the spindle, which can be absorbed by the current spindle heads with less efficiency. This means that the heads for such loads must be greatly oversized relative to the axial forces.
Eine Aufgabe der vorliegenden Erfindung besteht daher darin, Verlängerungselemente, insbesondere Verbindungselement zum Aneinandersetzen von Trägern und längenveränderliche Befestigungsköpfe anzugeben, die eine bessere Übertragung der Kräfte auf den Träger bzw. zwischen den Trägern erbringen.An object of the present invention is therefore to provide extension elements, in particular connecting element for engaging carriers and variable-length attachment heads, which provide a better transfer of forces to the carrier or between the carriers.
Ein derartiges Verbindungselement zum Verbinden zweier Träger ist im Anspruch 1 angegeben. Die weiteren Ansprüche geben bevorzugte Ausführungsformen, Verbindungsteilsätze mit einem solchen Verbindungsteil und Träger zur Verwendung mit einem solchen Verbindungsteil bzw. Verbindungsteilsatz an.Such a connecting element for connecting two carriers is specified in
Das erfindungsgemässe Verbindungsteil beruht auf der Idee, dass es so ausgeführt ist, dass es in die seitlichen Holme eines Trägers eingeführt werden kann. Es ist dabei möglich, seine Abmessungen recht genau an den verfügbaren Querschnitt anzupassen, so dass sich ein trotz der massiven Bauform nahezu spielfreier Sitz in dem Holm ergibt. Da das Verbindungsteil nahezu den gleichen Querschnitt wie das Profil der Trägerholme aufweist und am gleichen Ort im Träger sitzt wie die Holme, genügt eine nur geringfügig höher belastbare Ausführung (z.B. stärkeres Material, festeres Material), um auch an der Verbindungsstelle zwischen zwei Trägern dieselbe Stabilität wie bei den Trägern selbst zu erzielen.The connecting part according to the invention is based on the idea that it is designed in such a way that it can be inserted into the lateral bars of a carrier. It is possible to adapt its dimensions quite accurately to the available cross-section, so that a result despite the massive design almost backlash in the spar. Since the connecting part has almost the same cross section as the profile of the support beams and sits in the same place in the carrier as the spars, only a slightly higher loadable design (eg stronger material, stronger material) is sufficient to the same stability even at the junction between two carriers as with the wearers themselves.
Für die Verriegelung dieser Verbindungsteile in den Trägerholmen wird in einer bevorzugten Ausführung ein spezielles Verriegelungsteil vorgeschlagen, nämlich ein Bolzen, der an beiden Enden im gleichen Sinn konisch ausgeführt ist und im Mittelteil ein Gewinde aufweist. Das dazu passende Verbindungsteil verfügt im Innern ebenfalls über ein Gewindeloch. Seine Wände wie auch die entsprechenden Löcher in den Holmen des Trägers sind fluchtend konisch ausgeführt. Das Verriegelungsteil kann damit durch die Löcher in den Holmen und die dazu fluchtend angeordneten Löcher im Verbindungsteil gesteckt und im Gewinde des Verbindungsteils spielfrei fest verschraubt werden.For the locking of these connecting parts in the carrier beams a special locking member is proposed in a preferred embodiment, namely a bolt which is conical at both ends in the same sense and in the middle part has a thread. The matching connecting part also has a threaded hole in the interior. Its walls as well as the corresponding holes in the bars of the carrier are aligned conically. The locking member can thus be inserted through the holes in the spars and aligned holes arranged in the connector and screwed tight in the thread of the connecting part without play.
Die Erfindung wird weiter an bevorzugten Ausführungsbeispielen unter Bezugnahme auf Figuren erläutert. Es zeigen:
- Fig. 1
- Explosionsansicht von Trägern mit Verbindungsteil
- Fig. 2
- Schnitt durch die Träger gemäss II - II in
Fig. 1 - Fig. 3
- Draufsicht auf Verbindungsteil
- Fig. 1
- Exploded view of straps with connector
- Fig. 2
- Section through the carrier according to II - II in
Fig. 1 - Fig. 3
- Top view on connecting part
In
Zum Verbinden der beiden Träger 1 zu einem längeren Träger ist ein Verbinder 5 eingesetzt. Der Verbinder 5 entspricht in seiner äusseren Formgebung der Innenkontur der Holme 2 (siehe
Im Vergleich mit einem Verbindungsteil, das in den Innenraum 12 eingeführt ist, sitzen die Verbinder 5 somit direkt und im Querschnitt nur geringfügig verkleinert an den Orten, in denen die Kräfte (Zug-, Druck- und Biegekräfte) im Träger weitergeleitet werden. Ein Verbindungsteil, das im Innenraum 12 angeordnet wäre, müsste für eine ähnlich dem Träger belastbare Verbindung (z.B. mindestens 80 % der Trägerbelastbarkeit) so massiv ausgeführt, dass es nahezu vollständig den Innenraum 12 ausfüllen würde. Darüber hinaus dient der Innenraum, d.h. die quer dazu durch ihn hindurch führenden Öffnungen und Durchbrechungen, einer Funktion bei der Errichtung von Schalungs- und Traggerüsten. Durch ein massives Verbindungsteil in diesem Innenraum würde diese Funktion beeinträchtigt.In comparison with a connecting part, which is inserted into the
Die Schmalseiten 14 der Verbinder 5 liegen dagegen mit allenfalls geringem Spiel (< 1 mm, normalerweise 0,5 - 0,8 mm) an den Innenschmalseiten 16 des Holms 2 an, und es ergibt sich auch bei gleichem Material und gleicher Materialstärke von Verbinder und Holm eine gleichwertige Festigkeit gegen Biegemomente. Der ansonsten nahezu übereinstimmende Querschnitt ergibt das gleiche Ergebnis auch bezüglich Druckkräften und insbesondere Zugkräften, die an der Verbindungsstelle auf die Verbinder einwirken. Durch die Wahl eines festeren Materials (Stahl höherer Dehn-/Streckgrenze, eine höhere Wandstärke des Rohrprofils des Verbinders 5 oder andere äquivalente Massnahmen) ist es möglich, die Belastbarkeit des Verbinders, d.h. der Verbindungsstelle zwischen den Trägern 1, an diejenige der Träger noch besser anzugleichen.The
Für die Herstellung einer Verbindung, die insbesondere auch Zugkräfte aufnehmen kann, ist es nötig, die Verbinder in den Holmen 2 zu verankern. Dazu bieten sich unlösbare oder lösbare Verbindungen an. Als unlösbare Verbindung sind beisp. Schweissungen, insbesondere Lochschweissungen denkbar. Als lösbare Verbindung, die an sich bekannt ist, bieten sich Verbolzungen an, d.h. Bolzen, die durch fluchtend zueinander angeordnete Löcher in den Verbindern 5 und den Holmen 2 hindurchgesteckt werden. Im einfachsten Fall handelt es sich um zylindrische Bolzen, z.B. Schrauben, Nieten oder stiftförmige Bolzen, die auf geeignete Art gegen Herausfallen gesichert sind. Derartige Bolzen sind als Normteile erhältlich. Nachteilig daran ist jedoch, dass bei zylindrischen Bolzen fertigungs- und anwendungsbedingt immer ein gewisses Spiel vorhanden sein muss, um das Anbringen des Bolzens zu gestatten. Dieses Spiel führt auch zu einem gewissen Spiel in der Verbindung zweier Träger, d.h. einem, wenn auch geringfügigen, Knick, der an sich unerwünscht ist. Wirken auf eine solche spielbehaftete Verbindung wechselnde Lasten ein, so bewegen sich die Träger gegeneinander an der Verbindungsstelle, was zu einer Beschädigung der Träger bis zum "Durchschlagen" führt, d.h. einer Zerstörung der Verbindung.For the production of a connection, which in particular can absorb tensile forces, it is necessary to anchor the connectors in the
Umgangen werden diese Probleme dadurch, dass ein konischer Bolzen in Verbindung mit einer Schraubverbindung verwendet wird. Wie in
Im Inneren des Verbinders 5 sind schwimmend Blechplatten 28 angeordnet. Wie in
Der Bolzen 20 weist von seinem Kopfende beginnend her einen ersten konischen Abschnitt 36, einen zylindrischen, mit einem Gewinde versehenen Mittelabschnitt 38 und anschliessend bis zum Ende einen zweiten konischen Abschnitt 40 auf. Der Durchmesser des ersten konischen Abschnitts ist dabei an die Löcher 22 des Holms und 25 des Verbinders 5 angepasst, derjenige des zweiten konischen Abschnitts 40 entsprechend an das Loch 23 im Holm und das Loch 26 im Verbinder 5. Wie in
Der Durchmesser des Bolzens 20 und entsprechend der Löcher 22, 23, 25 und 26 ist im Hinblick auf eine maximale Festigkeit optimiert worden. Eine Vergrösserung des Durchmessers führt zu einer grösseren Festigkeit des Bolzens, schwächt jedoch den Verbinder 5. Die dargestellte Ausführung, bei der der Durchmesser des Bolzens im Mittel in etwa halb so gross ist wie die Breite 42 des Verbinders 5, erfüllt diese Bedingung bei Verwendung gleichwertigen Materials für Verbinder 5 und Holm 2. Etwas verallgemeinert kann ein mittlerer Durchmesser im Bereich von etwa 40 - 60 % der Höhe 42 angenommen werden.The diameter of the
Ein anderer Auslegungsfaktor ist die Schräge der Konizität der Abschnitte 36, 40 des Bolzens 20, bzw. der Löcher 22, 23, 25 und 26. Bevorzugt ist ein Konizitätswinkel 45, der im Übergangsbereich zwischen Selbsthemmung und Lösen bei dem verwendeten Material (Stahl) liegt. Bei einem solchen Winkel entsteht keine relevante Ausdrückkraft des Bolzens bei einer Belastung und er ist doch mit geringem Aufwand wieder zu lösen. Bei einem normalen Baustahl liegt dieser Winkel bei etwa 12 Grad.Another design factor is the slope of the taper of the
Das Einlegen der Blechplatten 28 in die Verbinder 5 kann einmal dadurch erfolgen, dass die Verbinder aus zwei Teilen zusammengesetzt oder aus einem Teil durch Falten in Längsrichtung geformt werden, wobei die Blechplatten 28 vor der Formung bzw. dem Zusammensetzen eingelegt werden.The insertion of the
Wird der Verbinder 5 aus zwei Teilen zusammengesetzt, so werden die Blechplatten 28 vor dem Zusammenfügen der Teile eingelegt. Wird der Verbinder 5 aus nur einem Blechteil geformt, so kann dies z.B. soweit vorgeformt werden, dass der Verbinder 5 bis auf einen Schlitz ausgebildet ist, wobei sich der Schlitz ein durch die Bohrungen 25, 26 erstreckt und so breit ist, dass die Blechplatten 28 hindurchgeschoben werden können.If the
Umgekehrt besteht auch die Möglichkeit, die Vorsprünge 30 nachträglich an den Blechplatten 28 anzubringen. Dazu können die Blechplatten 28 mit Gewindebohrungen oder auch mit einer über die ganze Breite sich erstreckenden Bohrung an jedem der beiden Enden versehen sein. Die Blechplatten 28 werden in das Hohlprofil des Verbinders 5 eingeführt, so dass die Bohrungen in den Blechplatten 28 durch die Bohrungen 32 im Verbinder 7 zugänglich sind. Dann werden Schrauben in die Blechplatte durch die Bohrung 32 hindurch hineingeschraubt, wobei deren Köpfe die Vorsprünge 30 der Blechplatte bilden. Im Fall einer durchgehenden Bohrung durch die Blechplatten kann auch eine Stange hindurch geschoben werden, die eine grössere Länge aufweist, so dass ihre Enden über die Blechplatte 28 hinausstehen und die Vorsprünge 30 bildet. Die Stange wird dann auf geeignete Art in der Blechplatte fixiert, z.B. durch eine Schweissung, einen Splint oder ähnliches.Conversely, it is also possible to attach the
Insgesamt wird damit eine Verbindung erhalten, die wenigstens nahezu die gleichen Festigkeits- und Stabilitätseigenschaften aufweist wie ein Holm 2. Ein derartig verlängerter Träger ist damit praktisch ein Äquivalent zu einem einstückigen Träger dieser Bauart selber Länge. Insbesondere wird auch die Funktion der durch den Träger hindurch verlaufenden Löcher und Durchlässe für Querverstrebungen und Querträger nicht behindert. Die angegebenen Bolzen, insbesondere mit einer in den Kopf eingearbeiteten Antriebsfläche 47, ragen auch kaum über die Oberflächen der Holme hinaus und treten damit nicht störend in Erscheinung.Overall, thus a compound is obtained, which has at least almost the same strength and stability properties as a
Aus der vorangehenden Beschreibung der bevorzugten Ausführungsbeispiele der Erfindung sind dem Fachmann zahlreiche Abwandlungen zugänglich, ohne den Schutzbereich der Erfindung zu verlassen, der nur durch die Patentansprüche definiert ist. Denkbar ist z.B.:
- Ausführung des Verbindungsteils mit anderem als rechteckiger Querschnitt, z.B. polygonal und / oder mit gebogenen Seitenwänden, im Extremfall als Rohre mit kreisförmigem, elliptischem oder ovalem Querschnitt;
- Die Erhebungen für leichteres, aber spielfreies Einführen des Verbindungsteils bzw. der Fortsätze des Spiralkopfs in die Trägerholme sind anders als linienförmig ausgeführt, insbesondere als lineare bis zufällige Anordnung von Erhebungen, die jeweils praktisch punktförmig mit geringer Fläche an den Holminnenseite anliegen.
- Execution of the connecting part with other than rectangular cross-section, for example polygonal and / or curved side walls, in extreme cases as tubes with a circular, elliptical or oval cross-section;
- The surveys for easier, but backlash-free insertion of the connecting part or the extensions of the spiral head in the support beams are designed differently than linear, in particular as a linear to random arrangement of surveys, each of which abut practically punctiform with a small area on the Holminnenseite.
Claims (12)
- Extension piece (5) for trusses (1) used in concrete formwork and scaffolding systems, the trusses comprising longitudinally extending, stability-determining beams (2) made of a hollow profile, the extension piece being bar-shaped and having external dimensions such that the extension piece is insertable substantially without play into the beams, whose internal dimensions are adapted to the external dimensions of the extension piece, of two trusses in order to connect them, characterised in that the extension piece is a hollow profile and that in its interior, between two respective opposed holes (25, 26) for a locking member, a connecting part (28) is arranged in which a locking member is detachably fastenable.
- Extension piece (5) according to claim 1, characterised in that it has at least two fixing holes (25, 26) extending transversely to its longitudinal direction such that the connecting part, when inserted into the beams (2) of a truss (1), is fixable in the respective beam by bolt-like locking members (20) that are pushed through holes (22, 23) in the beams and the holes in the extension piece in order to connect two trusses.
- Extension piece (5) according to claim 1, characterised in that the connecting part (28) has at least one hole with a thread for receiving a locking member (20).
- Extension piece (5) according to one of claims 1-3, characterised in that the connecting part (28) is held in the extension piece in a floating manner by at least one projection (30) and at least one complementary recess (32), the projection being located on the connecting part or on the extension piece and the recess on the respective other part, and the projection engaging in the recess with play.
- Extension piece (5) according to one of claims 1 - 4, characterised in that the connecting part (28) is substantially plate-shaped.
- Extension piece (5) according to claim 5, characterised in that the connecting part (28) has at least two projections (30) that are arranged on opposite surfaces of the extension piece.
- Extension pieces set for trusses (1) comprising an extension piece (5) according to one of claims 1 - 6, characterised in that it further comprises rod-shaped locking members (20) whose heads (36) and ends (40) are conical and that the holes (25, 26) in the extension piece are conically shaped complementarily thereto such that the extension piece is anchorable in a beam (2) of a truss (1) in a substantially play-free manner by pushing the locking member through the beam and the extension piece.
- Extension piece set according to claim 7, characterised in that the cone angle (45) of the conical sections is chosen small enough to exclude that a lateral force may push the locking members (20) out of the conical holes in the connecting part (5).
- Extension pieces set according to one of claims 7 - 8, characterised in that between the head (36) and the end (40) of the locking member a middle section (38) is provided that forms a fastening section which is fastenable to the connecting part (28).
- Extension piece set according to claim 9 as far as dependent on one of claims 3 - 8, characterised in that the fastening section (38) is provided with a thread.
- Truss set, comprisinga) at least two trusses (1) comprising longitudinally extending, stability-determining beams (2) made of a hollow profile, andb) at least one extension piece according to one of claims 1-6 or an extension pieces set according to one of claims 7-8, the external dimensions of the extension piece (5) being adapted to the internal dimensions of the beams.
- Truss (1) in combination with an extension piece (5) according to one of claims 1 - 6 or an extension pieces set according to one of claims 7 - 10 and for use with such an extension piece or with such an extension pieces set, characterised in that the support comprises beams (2) that are spaced apart, that connecting parts are insertable into the beams at one end at least of the support, and that the beams have at least one hole through which a locking member (20) for fixing the extension piece can be pushed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07405015.4A EP1947262B1 (en) | 2007-01-18 | 2007-01-18 | Extension for supports used in concrete formwork and shoring systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07405015.4A EP1947262B1 (en) | 2007-01-18 | 2007-01-18 | Extension for supports used in concrete formwork and shoring systems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1947262A1 EP1947262A1 (en) | 2008-07-23 |
EP1947262B1 true EP1947262B1 (en) | 2013-11-27 |
Family
ID=38222058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07405015.4A Not-in-force EP1947262B1 (en) | 2007-01-18 | 2007-01-18 | Extension for supports used in concrete formwork and shoring systems |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1947262B1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3173321D1 (en) * | 1980-09-29 | 1986-02-06 | Aluma Systems | Bolted aluminium shoring frame |
EP1092821A1 (en) | 1999-10-13 | 2001-04-18 | Josef Röllin | Truss, especially for shuttering devices for concrete construction |
AT500952B8 (en) * | 2004-10-25 | 2007-02-15 | Bgb Breuss Geruestbau Gesmbh | RACK OF ALUMINUM |
DE102005006961A1 (en) * | 2005-02-16 | 2006-08-17 | Lung Ching Shih | Support beam has multiple through holes formed axially along beam at bottom wall of recessed space that is formed inward from top wall |
DE202005017667U1 (en) * | 2005-11-11 | 2006-01-12 | B & K Braun Gmbh | connecting device |
-
2007
- 2007-01-18 EP EP07405015.4A patent/EP1947262B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP1947262A1 (en) | 2008-07-23 |
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