EP1947262A1 - Elément de rallonge et tête de fixation variable en longueur pour supports dans la construction de coffrage et d'armature - Google Patents

Elément de rallonge et tête de fixation variable en longueur pour supports dans la construction de coffrage et d'armature Download PDF

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Publication number
EP1947262A1
EP1947262A1 EP07405015A EP07405015A EP1947262A1 EP 1947262 A1 EP1947262 A1 EP 1947262A1 EP 07405015 A EP07405015 A EP 07405015A EP 07405015 A EP07405015 A EP 07405015A EP 1947262 A1 EP1947262 A1 EP 1947262A1
Authority
EP
European Patent Office
Prior art keywords
extension
carrier
extension part
spars
length
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.)
Granted
Application number
EP07405015A
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German (de)
English (en)
Other versions
EP1947262B1 (fr
Inventor
Jürgen Brecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CONRAD KERN AG
Original Assignee
CONRAD KERN AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CONRAD KERN AG filed Critical CONRAD KERN AG
Priority to EP07405015.4A priority Critical patent/EP1947262B1/fr
Publication of EP1947262A1 publication Critical patent/EP1947262A1/fr
Application granted granted Critical
Publication of EP1947262B1 publication Critical patent/EP1947262B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00Scaffolds primarily resting on the ground
    • E04G1/02Scaffolds 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
    • E04G1/12Scaffolds 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00Scaffolds primarily resting on the ground
    • E04G1/18Scaffolds primarily resting on the ground adjustable in height
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36Forms, 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/14Bracing 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. Furthermore, it relates to a variable-length mounting head for such a carrier according to the preamble of claim 15th
  • 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.
  • variable-length fastening head which achieves this object, is specified in claim 14.
  • the further claims indicate preferred embodiments of the mounting head.
  • 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.
  • the inventive variable-length attachment head is characterized by the fact that he also has the property the support rails uses that they are made of hollow sections.
  • the mounting head has corresponding projections which can be inserted into the spars and transmit those forces to the carrier, which act on the mounting head in a different direction than in the direction of the change in length, ie the spindle.
  • 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 this can be done 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 also results in 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 lies 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.
  • FIG. 4 and 5 show a spindle head 51 which is placed on a support 1.
  • the effective length of the carrier can be adjusted continuously, so that it can be used as an oblique, stiffening connection between horizontally and vertically extending carriers in a scaffold.
  • the drive with a spindle 53 which can be adjusted via a square 54 and a corresponding gear 55.
  • the spindle is supported on a pressure plate 57, which is placed on the spar 2 and transfers compressive forces directly to the carrier.
  • the plate 57 is connected to a second plate 61 which rests on the transverse plates 3 of the carrier 2.
  • the second plate holds the main plate 57 on the support 1 even if tensile forces occur, for example when the spindle head is shortened against friction or other resistance.
  • the spindle 53 itself is suitable, even high normal forces, i. Forces substantially in the direction of the spindle axis, to transfer. However, the transmission of other forces or moments is not possible to the same extent, since the design and the moments of resistance of the threaded rod 63 of the spindle for these forces and moments relative to the normal force sets a low limit.
  • the spindle 53 is rotatably connected to the movable head part 65.
  • the connection is in Essentially from a dome-shaped part 67 which is held in a ring 69 with spherical recess 70, wherein the recess is adapted to the shape of the dome-shaped part 67.
  • the ring 69 is fixed to the base plate 71 of the head part 65, which carries the ribs 73.
  • the ribs 73 have holes 75, which serve for attachment to other scaffolding parts.
  • the spindle 53 is supported via the nut 77, which is secured for tensile load by a pair of lock nuts 79. Between the head of the nut 77 and the counter nut pair 79 remains a distance that is noticeably greater than the thickness of the pressure plate 57. In addition to this loose or play-affixed fastening of the nut 77 on the pressure plate 57 occurs that the nut 77 in the region of the hole 81 has a noticeably smaller diameter than the hole, so that here also a radial displacement of the spindle 53 within the plate 57 is possible.
  • the other forces (bending moments, etc.) are taken over by the laterally mounted pipe sections 83.
  • the tubular profiles 83 are mounted on the head part 65 and protrude into the spars 2, which are also tubular profiles.
  • the outer contour of the tubular profiles 83 is adapted to the inner contour of the spars 2, that on the one hand gives a small game, but they still remain with acceptable, ie the least possible effort in the spars 2 movable.
  • the tube profiles 83 may be slightly shallower than the inner contour of the spars 2 are selected and the resulting game can be reduced again that elevations are formed in the corresponding pages, for example, extending in the longitudinal direction, raised webs.
  • These surveys have only punctiform or line-like facilities on the inner surfaces of the bars 2, so that the force for their displacement in the bars is low, even if they rest without play.
  • On the narrow sides 85 ( Fig. 4 ) of the pipe sections 83 can be dispensed with such an additional measure usually because here the contact surface is a priori low. It is conceivable, however, also here to reduce the contact surfaces by chamfering the longitudinal edges (phases 87).
  • the tube profiles 83 have a length such that, even with the head part 65 fully extended, they are still sufficiently guided in the bars 2 in order to transmit the moments and transverse forces from the head part 65 to the carrier 1.
  • the length of the tubular profiles 83 from the base plate 71 is therefore at least twice as large as the maximum distance between the base plate 71 and pressure plate 57th
  • spindle 53 By separating the elements that absorb the normal forces (spindle 53) of those that are caused by the skew, pre-curvature, Lagerexzentriztician or transverse loads record (tube profiles 83), a significantly greater overall load capacity of the spindle head is achieved.

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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)
EP07405015.4A 2007-01-18 2007-01-18 Elément de rallonge pour supports dans la construction de coffrage et d'armature Not-in-force EP1947262B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07405015.4A EP1947262B1 (fr) 2007-01-18 2007-01-18 Elément de rallonge pour supports dans la construction de coffrage et d'armature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07405015.4A EP1947262B1 (fr) 2007-01-18 2007-01-18 Elément de rallonge pour supports dans la construction de coffrage et d'armature

Publications (2)

Publication Number Publication Date
EP1947262A1 true EP1947262A1 (fr) 2008-07-23
EP1947262B1 EP1947262B1 (fr) 2013-11-27

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ID=38222058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07405015.4A Not-in-force EP1947262B1 (fr) 2007-01-18 2007-01-18 Elément de rallonge pour supports dans la construction de coffrage et d'armature

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EP (1) EP1947262B1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049096A1 (fr) * 1980-09-29 1982-04-07 Aluma Systems Incorporated Echafaudage d'aluminium verrouillé
DE202005017667U1 (de) * 2005-11-11 2006-01-12 B & K Braun Gmbh Verbindungseinrichtung
EP1650376A2 (fr) * 2004-10-25 2006-04-26 BGB Breuss Gerüstbau GesmbH Poutre d'échafaudage en aluminium
CH695386A5 (de) 1999-10-13 2006-04-28 Kern Ag Conrad Systemträger für Schalungen und Lehrgerüste für Schwerlastanwendung im Betonbau.
DE102005006961A1 (de) * 2005-02-16 2006-08-17 Lung Ching Shih Stützschiene

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049096A1 (fr) * 1980-09-29 1982-04-07 Aluma Systems Incorporated Echafaudage d'aluminium verrouillé
CH695386A5 (de) 1999-10-13 2006-04-28 Kern Ag Conrad Systemträger für Schalungen und Lehrgerüste für Schwerlastanwendung im Betonbau.
EP1650376A2 (fr) * 2004-10-25 2006-04-26 BGB Breuss Gerüstbau GesmbH Poutre d'échafaudage en aluminium
DE102005006961A1 (de) * 2005-02-16 2006-08-17 Lung Ching Shih Stützschiene
DE202005017667U1 (de) * 2005-11-11 2006-01-12 B & K Braun Gmbh Verbindungseinrichtung

Also Published As

Publication number Publication date
EP1947262B1 (fr) 2013-11-27

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