EP0607805A1 - Poutre en bois moulée et procédé pour sa fabrication - Google Patents

Poutre en bois moulée et procédé pour sa fabrication Download PDF

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Publication number
EP0607805A1
EP0607805A1 EP94100123A EP94100123A EP0607805A1 EP 0607805 A1 EP0607805 A1 EP 0607805A1 EP 94100123 A EP94100123 A EP 94100123A EP 94100123 A EP94100123 A EP 94100123A EP 0607805 A1 EP0607805 A1 EP 0607805A1
Authority
EP
European Patent Office
Prior art keywords
core
channel
beam body
wood
molded
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
EP94100123A
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German (de)
English (en)
Other versions
EP0607805B1 (fr
Inventor
Karl Moser
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0607805A1 publication Critical patent/EP0607805A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N5/00—Manufacture of non-flat articles
    • B27N5/02—Hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/28—Moulding or pressing characterised by using extrusion presses
    • 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
    • E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or 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
    • E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members
    • E04C3/185—Synthetic reinforcements
    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures

Definitions

  • the invention relates to a shaped wooden beam, comprising a molded, in particular extruded, beam body made of wood particles and binder, which contains in the longitudinal direction of the beam at least one channel extending essentially over the entire length of the beam.
  • the essentially rectangular cross-section of the beam body of the known molded wood beams is covered with solid wood boards on opposite sides and has a continuous channel in the middle, which on the one hand should reduce the total weight of the molded wood beam and on the other hand should accelerate the drying and curing process in the manufacture of the beam body .
  • this object is achieved according to the invention in that a core made of a material with a greater bending and tensile strength, which extends essentially in one piece over the entire length of the beam, is inserted into the channel.
  • the core can be made of metal or plastic, but for cost reasons it preferably consists of laminated wood, in particular laminated veneer lumber with a large number of very thin veneer layers, the majority of which have wood fibers running in the longitudinal direction of the beam.
  • the core is arranged essentially loosely in the channel of the beam body. Conveniently it even has a certain play in the channel transversely to its longitudinal direction in order to be able to absorb moisture-dependent dimensional changes in the beam body (swelling or shrinking).
  • the cross section of the core can also be smaller than the cross section of the channel, and the space thus created between the core and the inner wall of the channel can be filled with a filler material.
  • the filling material can have elastic properties, for example be foamed, or it can produce a firm adhesive connection between the core and the inner channel wall.
  • the core is anchored to the beam body in the region of its ends, preferably exclusively in the region of its ends, and is installed in the beam body with prestress. This measure can considerably increase the bending strength of the molded wood beam.
  • tension anchors can be provided, for example in the form of end plates or screw bolts extending transversely through the beam body and the core.
  • the ends of the core in particular if this is a wooden component, can also be glued to the inner wall of the channel.
  • the core ends at a distance from the ends of the channel, and the regions of the channel which extend beyond the ends of the core in this way form pockets for receiving connecting pieces for connecting adjacent ends of two beam bodies.
  • This type of connection is particularly advantageous in wall panel construction, since the connecting piece which can be moved in the pockets can be used for fastening to struts or the like which run transversely to the beam and at the same time compensates for changes in length of the shaped wood beams when swelling or shrinking.
  • the channel and the core preferably have an elongated, in particular substantially rectangular cross-section, the longitudinal direction of which lies in the bending plane of the beam body determined by the application. This increases the bending strength of the shaped wood beam, in particular if the beam body contains a plurality of channels with cores arranged essentially parallel to one another with respect to their longitudinal directions.
  • clamping devices for example screw anchors or the like, can be arranged at the ends of the cores.
  • anchors increase the manufacturing effort.
  • Molded wood beams with pre-stressed cores can, however, be produced very easily if the ends of the core are initially anchored to the beam body essentially without pre-stress, but at least with a pre-stress less than the pre-stress desired for the application, and then the moisture content of the beam body is increased. When the moisture content increases, the beam body swells and the resulting elongation causes the core to be prestressed.
  • the core is expediently installed immediately after its strand formation, during which the moisture content is greatly reduced during curing.
  • the moisture content increases, which leads to a considerable change in length (up to 11%). If the core is therefore installed immediately after the manufacturing process of the beam body, it is automatically prestressed by the subsequent swelling process. The degree of preload leaves regulate themselves via the initial moisture content of the beam body.
  • the wall element shown in Fig. 1 is formed by a plurality of horizontally extending, one above the other shaped wooden beams 1, which are supported with connecting plates 3 on vertically extending supports 5, for example made of reinforced concrete.
  • Each of the shaped wood beams 1 has an elongated beam body 7, which is essentially rectangular in cross section and has a groove 9 running in the longitudinal direction of the beam on its underside and a rib 11 aligned with it on its top.
  • the ribs 11 engage in the grooves 9 of the beam bodies 7 lying above them.
  • Elastic sealing strips 13 inserted into the grooves 9 seal joints between the superimposed beam bodies 7.
  • the connection plates 3 are nailed or screwed onto the shaped wooden beams 1 and engage behind with a head 15 the edges of a vertically extending, for example dovetail-shaped groove 17 in the support 5.
  • the beam body 7 is extruded from wood particles, for example wood shavings or the like, which have been mixed with a binder, as described, for example, in DE-C-29 32 406.
  • the beam body 7 contains at least one, here two, longitudinally extending channels 19, which accelerate the hardening during the manufacturing process.
  • the channels 19 have an elongated, approximately rectangular cross-section and extend with their cross-sectional long side transversely to the plane of the wall formed by the shaped wooden beams 1.
  • the channels 19 are arranged one above the other in the wall plane and run parallel to one another, also with regard to their cross-sectional longitudinal direction.
  • each of the core rods 21 consists of laminated veneer lumber with a comparatively high number of veneer layers running along the channels 19 and parallel to their longitudinal cross-sectional direction, the wood fibers of which are indicated at 25 in FIG. 2 run approximately in the longitudinal direction of the beam body 7.
  • the game 23 allows the bar body 7 to shrink with changes in temperature and humidity, without internal stresses stressing the bar body to the point of bursting.
  • the game 23 is, however, only so great that initial bending loads on the beam body 7, for example due to a wind load or the like, lead to a play compensation and to an increased support of the beam body 7 on the core rods 21 even at a comparatively low load.
  • the shaped wooden beams 1 can also be realized from the shaped wooden beams 1.
  • the shaped wood beams can also be used as construction elements for supports, struts or the like.
  • the core rods 21 can also consist of a material other than laminated veneer lumber, for example of plastic or metal.
  • FIGS. 1 and 2 Variants of shaped wood beams are explained below. Components having the same effect are designated by the reference numerals of FIGS. 1 and 2 and provided with a letter to distinguish them. For explanation, reference is made to the above description, in particular FIGS. 1 and 2.
  • the shaped wood beam 1 a shown in FIG. 3 again contains core rods 21 a consisting of laminated veneer lumber in the channels 19 a of its beam body 7 a.
  • the spaces between the inner wall of the channel 19a and the core rod 21a arranged therein are essentially filled to the entire length of the beam body 7a by an at least limited elastic material 27.
  • the material 27, which can be an adhesive, connects the core rods 21a to the beam bodies 7a. This measure increases the bending strength of the shaped wood beam 1a.
  • FIG. 4 shows a shaped wood beam 1b, in which the core rod 21b arranged in the channel 19b is fixedly connected to the beam body 7b exclusively in the region of the ends of the core rod 21b (only one end is shown).
  • the core rod 21b runs loosely movable between the ends, preferably with a clearance 23b, in the channel 19b.
  • the ends of the core rod 21b are firmly connected to the bar body 7b by adhesive 27b, in such a way that the core rod 21b is installed under prestress.
  • an anchor bolt 29 penetrating both the bar body 7b and the end of the core rod 21b can also be provided for the attachment.
  • the preload can be introduced into the core rod 21b by means of suitable pulling devices acting on the core rod 21b during the installation.
  • the core rod 21b is preferably introduced by lengthening the bar body 7b by swelling due to moisture.
  • the wood portion is dried out very much, which causes the extrusion material to shrink.
  • the core rod 21b is inserted immediately after the extrusion process in the channel 19b and anchored at the end to the beam body 7b.
  • the beam body 7b swells, its length changing considerably and tensioning the core rod 21b.
  • Fig. 5 shows a variant of a wall element, which are also constructed with horizontally arranged shaped wooden beams 1c and are held on vertical supports 5c.
  • the shaped wood beams 1c can be one of the beams explained above, wherein each shaped wood beams 1c in turn contains core rods 21c arranged in channels 19c.
  • the core rods 21c end at a distance from the end of the beam body 7c.
  • the portion of the channel 19c remaining in the region of the end of the beam body 7c forms a pocket 31 for receiving a connecting piece 33 which is located opposite one another in the pockets 31 Beam body 7c engages.
  • the beam bodies 7c overlap the support 5c, but end at a distance from one another.
  • a fastening element for example a nail or a screw 35, holds the connecting element 33 between the ends of adjacent beam bodies 7c on the support 5c.
  • the depth of penetration of the connecting element 33 into the pockets 31 is less than their total depth. This dimensioning, in conjunction with the distance between opposite ends of adjacent beam bodies 7c, ensures that the beam bodies 7c can expand as a function of temperature and moisture.
  • the connecting piece 33 clamps the beam body 7c against the support 5c. However, its transverse dimensions are dimensioned so that expansion compensation is also possible here.
  • the passage hole for the screw 35 in the connecting element 33 is also designed as an elongated hole in order to ensure expansion compensation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP94100123A 1993-01-18 1994-01-05 Poutre en bois moulée et procédé pour sa fabrication Expired - Lifetime EP0607805B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4301153A DE4301153C1 (de) 1993-01-18 1993-01-18 Formholzbalken und Verfahren zu seiner Herstellung
DE4301153 1993-01-18

Publications (2)

Publication Number Publication Date
EP0607805A1 true EP0607805A1 (fr) 1994-07-27
EP0607805B1 EP0607805B1 (fr) 1997-04-23

Family

ID=6478396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100123A Expired - Lifetime EP0607805B1 (fr) 1993-01-18 1994-01-05 Poutre en bois moulée et procédé pour sa fabrication

Country Status (3)

Country Link
EP (1) EP0607805B1 (fr)
AT (1) ATE152030T1 (fr)
DE (2) DE4301153C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012215151A1 (de) * 2012-08-27 2014-02-27 Areva Gmbh Trägeranordnung sowie damit errichtete Konstruktion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084640A1 (fr) * 1981-12-21 1983-08-03 Anton Heggenstaller Dispositif d'alimentation de la chambre de charge d'une presse extrudeuse horizontale à piston avec un mélange de petites particules végétales et un liant, pour la fabrication de profilés creux prismatiques extrudés
GB2171953A (en) * 1985-03-05 1986-09-10 Moeller Hubert Reinforced profile members and methods of making the same
DE8625692U1 (fr) * 1986-09-26 1986-11-27 Anton Heggenstaller Gmbh, 8891 Unterbernbach, De
GB2186655A (en) * 1986-02-18 1987-08-19 Moeller Hubert Hollow profile member

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1147746B (de) * 1958-10-30 1963-04-25 Georges Masse Verfahren und Vorrichtung zur kontinuierlichen Herstellung einer mit Verstaerkungseinlagen armierten Spanholz-pressplatte fuer Behaelter
DE2932406C2 (de) * 1979-08-09 1983-06-23 Anton 8892 Kühbach Heggenstaller Verfahren und Vorrichtungen zum Strangpressen eines Gemenges auf pflanzlichen Kleinteilen und Bindemitteln
DE3321307C2 (de) * 1983-06-13 1986-06-19 Anton 8892 Kühbach Heggenstaller Verfahren zur Herstellung von Tragriegeln, Profilstäben, Balken u.dgl. aus gepreßten pflanzlichen Kleinteilen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084640A1 (fr) * 1981-12-21 1983-08-03 Anton Heggenstaller Dispositif d'alimentation de la chambre de charge d'une presse extrudeuse horizontale à piston avec un mélange de petites particules végétales et un liant, pour la fabrication de profilés creux prismatiques extrudés
GB2171953A (en) * 1985-03-05 1986-09-10 Moeller Hubert Reinforced profile members and methods of making the same
GB2186655A (en) * 1986-02-18 1987-08-19 Moeller Hubert Hollow profile member
DE8625692U1 (fr) * 1986-09-26 1986-11-27 Anton Heggenstaller Gmbh, 8891 Unterbernbach, De

Also Published As

Publication number Publication date
ATE152030T1 (de) 1997-05-15
EP0607805B1 (fr) 1997-04-23
DE59402464D1 (de) 1997-05-28
DE4301153C1 (de) 1994-02-10

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