EP2021557A1 - Poutre à treillis en bois pour la construction - Google Patents

Poutre à treillis en bois pour la construction

Info

Publication number
EP2021557A1
EP2021557A1 EP07722219A EP07722219A EP2021557A1 EP 2021557 A1 EP2021557 A1 EP 2021557A1 EP 07722219 A EP07722219 A EP 07722219A EP 07722219 A EP07722219 A EP 07722219A EP 2021557 A1 EP2021557 A1 EP 2021557A1
Authority
EP
European Patent Office
Prior art keywords
grooves
struts
pins
glued
straps
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
EP07722219A
Other languages
German (de)
English (en)
Other versions
EP2021557B1 (fr
Inventor
Artur Schwörer
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.)
Peri GmbH
Original Assignee
Peri GmbH
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 Peri GmbH filed Critical Peri GmbH
Publication of EP2021557A1 publication Critical patent/EP2021557A1/fr
Application granted granted Critical
Publication of EP2021557B1 publication Critical patent/EP2021557B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/16—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with apertured web, e.g. trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces

Definitions

  • the invention relates to a lattice girder made of wood for the construction sector with an upper belt and a lower belt, which are connected by struts, which each have at their ends pins, the
  • lattice girders are used, for example, as a carrier in a formwork of concrete structures to be concreted, in particular of concrete ceilings and walls.
  • Generic lattice girders are known for example from the publications DE 18 07 956 Bl or DE 18 17 718 Al.
  • these lattice girders there are grooves in the straps which extend in the longitudinal direction of the straps, the side surfaces of the grooves being aligned parallel to one another. These grooves are usually milled.
  • the pins are worked out of the ends of the struts. Since the struts in generic
  • Lattice girders usually oblique, with an angle of approximately 45% on the
  • the pins have a triangular basic shape in their plane parallel to the longitudinal direction of the struts.
  • the pins are thereby formed by introducing parallel to this longitudinal sections cuts in the ends of the struts. So they also have mutually parallel side surfaces.
  • US 3,452,501 discloses a lattice girder made of wood for the construction sector with an upper belt and a lower belt, which are connected by struts, which each have at their ends pins.
  • the pins are each one end of the struts in grooves of the upper belt, which run in the longitudinal direction of the upper belt, glued and the pins of each of the other end of the struts in grooves of the lower belt, which run in the longitudinal direction of the lower belt glued.
  • the grooves are not adapted in their length to the dimensions of the pins but extend along the entire length of the straps, in another embodiment, the grooves are adapted to the dimensions of the pins. These grooves have a diamond-shaped cross-section.
  • the grooves are executed with diamond-shaped cross-section.
  • these are very expensive to produce.
  • Even with a milling cutter, the grooves with diamond-shaped cross-section would be very difficult ausformbar.
  • the invention has for its object to provide a lattice girder and a method for producing the lattice girder, which avoids the disadvantages of the prior art, in particular a permanently strong connection between the straps and the struts is achieved in a wider tolerance range, with a simple production the lattice girder should be possible.
  • the lattice girder according to the invention made of wood for the construction sector has an upper belt and a lower belt, which are interconnected by struts on.
  • the struts have each at the ends of pins, wherein the pins of one end of the struts in grooves of the upper belt which extend in the longitudinal direction of the upper belt, glued and the pins of the other end of the struts in grooves of the lower belt, the run in the longitudinal direction of the lower belt, are glued.
  • the length of the grooves in the longitudinal direction of the straps at least substantially corresponds to the dimensions of the pin or pin inserted and glued into the respective groove, ie the grooves each extend only over a partial length of the straps.
  • the side surfaces each extending in the longitudinal direction of each of the grooves include an acute angle and with these
  • the pins are tapered by the inclusion of the acute angle from the side surfaces towards their ends and the width of the grooves perpendicular to the longitudinal direction of the straps decreases correspondingly towards their respective groove bottom.
  • the cross sections of the grooves are rectangular or substantially rectangular.
  • the cross sections of the pins inserted into the grooves are advantageously shaped accordingly so that a snug fit of the pins is achieved in the grooves. If several pins inserted into a groove, so is the cross section of the Spigot formed in the groove structure preferably preformed rectangular.
  • the pins can fill and seal the volume of the grooves in such a way that no contaminants can penetrate into the grooves.
  • the rectangular design of the cross sections of the grooves allows easy production of the lattice girder according to the invention, since such grooves can be easily prepared by means of circular saw blades. In this case, at least two circular saw cuts are introduced, each with an angle to each other angled cutting plane to form a groove in a respective belt. Thus, a cost-effective and rapid production of the lattice girder according to the invention is possible.
  • ends of the struts each have two pins, a construction with high load capacity is achieved without too high production costs for forming the structures to be glued.
  • This space can be the Leimmengen, the Assemble the struts with the straps are displaced by the pressing of the side surfaces of the pins on the side surfaces of the grooves record, so that insertion of the pins in the grooves is possible without resulting from these Leimmengen displacement resistance.
  • the grooves of the grooves in the longitudinal direction of the straps each have a semicircular profile
  • the grooves can be cut by means of several inclined saw blades successively in the rotating belt.
  • two adjacent struts are interlinked in the region of their ends glued in grooves of one of the straps. This allows power transmission from strut to strut. A transverse load can be better absorbed by the lattice girder according to the invention.
  • the glued ends are preferably interlocked with each other via a fine galvanizing of adjacent pins.
  • Fine galvanizing forms a high contact surface due to the zigzag shape of the surfaces to be joined formed by the fine galvanizing. When gluing such trained contact surfaces a great strength is achieved.
  • the mutually toothed ends in the longitudinal direction of the straps each form a semicircular profile.
  • the corresponding edges of the obliquely adjacent to each other Struts then have an elliptical shape together with the semicircular profile.
  • Such shaped toothed ends, or pins can be accurately positioned in correspondingly shaped grooves.
  • the contact surfaces to be bonded that is to say the side surfaces of the pins and the associated side surfaces of the grooves, are maximized in terms of their area, which leads to particularly strong gluing and thus to particularly stable lattice girders.
  • the grooves in the straps in side view on circular and / or oval-shaped faces are adapted to the corresponding tine profiles of the struts.
  • the pins of the struts are glued into the grooves of the straps.
  • a first of the running in the longitudinal directions of the straps is produced by introducing a first circular saw cut formed.
  • the second of the side surfaces of this groove extending in the longitudinal directions of the straps is formed by inserting a second circular saw cut.
  • the cutting planes of the circular saw cuts are set according to the acute angle to be generated between the side surfaces of the groove.
  • FIG. 1a shows a section of a lattice girder according to the invention.
  • FIG. 1 b shows the section of the lattice girder according to the invention from FIG. 1 a in an exploded view.
  • FIG. 2 shows the section of the lattice girder according to the invention from FIGS. 1 in a side view.
  • FIG. 3 shows a strut of the lattice girder from FIGS.
  • FIG. 1a shows the section in an assembled state
  • FIG. 1b shows the section in an exploded view.
  • the lattice girder 1 has the dimensions that are common for such lattice girders in the construction sector.
  • the lattice girder 1 is a few meters long and its struts 2 and 4.5 straps are a few inches thick.
  • the lattice girder 1 has an upper belt 4 and a lower belt 5.
  • the straps 4,5 are connected to each other by struts 2.
  • the struts 2 are obliquely on the straps 4,5, wherein the struts 2 with the straps 4,5 approximately enclose an angle of 45 °.
  • the struts 2 each have at their ends two pins 7.
  • the straps 4,5 point in the longitudinal direction extending grooves 9, wherein in each case a groove 9 is associated with a pin 7.
  • a pin 7 is glued into the associated groove 9.
  • the pins 7 each one end of the struts 2 are thus glued into grooves 9 of the upper belt 4 and the pins 7 each of the other end of the struts 2 are glued into grooves 9 of the lower belt 5.
  • each of a groove 9 forms an acute angle
  • the surfaces 10 of the peg 7 glued into these respective side surfaces 12 enclose a corresponding acute angle.
  • the respective side surfaces 10,12 of the pin 7 and the grooves 9 are therefore not parallel to each other.
  • the pins 7 thereby taper towards their ends. Accordingly, the width of the grooves 9 decreases perpendicular to the longitudinal direction of the straps 4,5 in the direction of their groove bottom by the inclusion of the acute angle.
  • the pins 7 are glued in the grooves 9 with their respective side surfaces 10,12 fit. In each case two adjacent struts 2 are interlocked in the region of their glued in grooves 9 of the straps 4.5 ends.
  • the ends of the struts 2 and the pins 7 at their adjoining areas a fine galvanizing 14.
  • This fine galvanizing 14 consists in each case of a zigzag profiling of the regions formed on these regions, the profilings of the adjacent regions being complementary to one another in such a way that they intermesh with one another so that the corresponding lateral surfaces of the pins 7 and the struts 2 are respectively in a level.
  • the zigzag profiles of the Fei nverzin kung 14 can be seen in the figures in the adjacent to the pins 7 areas of the struts 2.
  • the groove bases of the grooves 9 each have a semicircular profile in the longitudinal direction of the straps 4, 5.
  • a corresponding semicircular profile 16 form the mutually toothed ends of the struts 2, or the toothed pin 7 in the longitudinal direction of the straps 4,5 respectively. That together with the associated edges of the struts 2 an ellipse shape is formed. As a result, the mutually glued side surfaces 10 are formed over a large area.
  • FIG. 2 shows a side view of the section of the lattice girder according to the invention from FIGS.
  • the dimensions of the pins 7, as they are positioned in the belts 4, 5 in the glued state, are indicated by semicircular dashed lines 20.
  • the semicircular profiles of the interlocking pin 7 and the groove bases correspond to these dashed lines 20 (simplified representation without tine play).
  • the dimension of the Feinverzinkungen 14 with respect to the depth of their mutual engagement in the respective adjacent strut 2 by two parallel dashed lines in the adjacent regions of the adjacent struts is shown.
  • FIG. 3 shows a single strut 2 of the lattice girder from FIGS. 1.
  • the tapering shape of the studs 7, which is formed by the formation of an acute angle through the respective lugs, can be clearly recognized
  • a lattice girder 1 made of wood for the construction sector with an upper belt 4 and a lower belt 5, which are connected by struts 2, each having at their ends pin 7, with each other, the pins 7 each end of the struts 2 in Grooves 9 of the upper belt 4, which extend in the longitudinal direction of the upper belt 4, are glued and the pins 7 each of the other end of the struts 2 in grooves 9 of the lower belt 5, which extend in the longitudinal direction of the lower belt 5, glued.
  • the side surfaces 12 extending in each of the longitudinal directions in each case one of the grooves 9 form an acute angle and the surfaces 10 of the peg 7 glued into these respective side surfaces 12 enclose a corresponding acute angle.
  • the invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne une poutre à treillis (1) en bois pour la construction, cette poutre comportant une membrure supérieure (4) et une membrure inférieure (5) reliées par des montants (2) dotés à leurs extrémités de tenons (7). Les tenons (7) d'une extrémité des montants (2) sont collés dans des mortaises (9) de la membrure supérieure (4), ces mortaises s'étendant dans le sens longitudinal de la membrure supérieure (4). Les tenons (7) de l'autre extrémité des montants (2) sont collés dans des mortaises (9) de la membrure inférieure (5), ces mortaises s'étendant dans le sens longitudinal de la membrure inférieure (5). Les surfaces latérales (12) s'étendant dans le sens longitudinal d'une des mortaises (9) comprennent un angle aigu et les surfaces (10) du tenon (7) collé dans la mortaise (9) correspondante, surfaces qui sont collées aux surfaces latérales (12), comportent un angle aigu correspondant.
EP07722219.8A 2006-05-10 2007-04-17 Poutre à treillis en bois pour la construction Active EP2021557B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006021731.4A DE102006021731B4 (de) 2006-05-10 2006-05-10 Verfahren zur Herstellung eines Gitterträgers aus Holz für den Baubereich
PCT/DE2007/000661 WO2007128255A1 (fr) 2006-05-10 2007-04-17 Poutre à treillis en bois pour la construction

Publications (2)

Publication Number Publication Date
EP2021557A1 true EP2021557A1 (fr) 2009-02-11
EP2021557B1 EP2021557B1 (fr) 2019-03-20

Family

ID=38292974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722219.8A Active EP2021557B1 (fr) 2006-05-10 2007-04-17 Poutre à treillis en bois pour la construction

Country Status (14)

Country Link
US (2) US20090094930A1 (fr)
EP (1) EP2021557B1 (fr)
JP (1) JP4818433B2 (fr)
KR (1) KR101083891B1 (fr)
CN (1) CN101443521B (fr)
AU (1) AU2007247633B2 (fr)
BR (1) BRPI0709790B1 (fr)
CA (1) CA2650788C (fr)
DE (1) DE102006021731B4 (fr)
NO (1) NO342435B1 (fr)
RU (1) RU2401922C2 (fr)
UA (1) UA91620C2 (fr)
WO (1) WO2007128255A1 (fr)
ZA (1) ZA200809478B (fr)

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Publication number Publication date
WO2007128255A1 (fr) 2007-11-15
JP2009536277A (ja) 2009-10-08
KR20080106591A (ko) 2008-12-08
ZA200809478B (en) 2009-11-25
BRPI0709790B1 (pt) 2018-01-09
JP4818433B2 (ja) 2011-11-16
RU2008148599A (ru) 2010-06-20
RU2401922C2 (ru) 2010-10-20
AU2007247633B2 (en) 2012-01-12
CA2650788A1 (fr) 2007-11-15
EP2021557B1 (fr) 2019-03-20
AU2007247633A1 (en) 2007-11-15
DE102006021731A1 (de) 2007-11-22
UA91620C2 (ru) 2010-08-10
CN101443521A (zh) 2009-05-27
US20110289881A1 (en) 2011-12-01
NO342435B1 (no) 2018-05-22
KR101083891B1 (ko) 2011-11-15
US20090094930A1 (en) 2009-04-16
BRPI0709790A2 (pt) 2011-07-26
NO20085109L (no) 2008-12-08
CN101443521B (zh) 2012-07-25
CA2650788C (fr) 2012-05-01
DE102006021731B4 (de) 2015-07-30

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