FR2582980A1 - Spring leaf made of bonded laminated wood - Google Patents
Spring leaf made of bonded laminated wood Download PDFInfo
- Publication number
- FR2582980A1 FR2582980A1 FR8508787A FR8508787A FR2582980A1 FR 2582980 A1 FR2582980 A1 FR 2582980A1 FR 8508787 A FR8508787 A FR 8508787A FR 8508787 A FR8508787 A FR 8508787A FR 2582980 A1 FR2582980 A1 FR 2582980A1
- Authority
- FR
- France
- Prior art keywords
- wood
- spring leaf
- spring
- leaf
- strips
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
- A47C23/06—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using wooden springs, e.g. of slat type ; Slatted bed bases
- A47C23/061—Slat structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/18—Leaf springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
Abstract
Description
La présente invention a pour objet une lame de ressort en bois ou bois composite lamellé collé. The present invention relates to a spring leaf made of wood or glued laminated composite wood.
Le bois lamellé collé a trouvé des très nombreuses utilisations au cours des dernières années. Outre les domaines traditionnels de l'ameublement et des constructions, ses applications dans l'emballage, l'outillage, les articles de sport, etc, se sont diversifiées, et c'est notamment le cas des lames de ressort. Or, d'une manière générale les lames de ressort en bois -ou bois composite- lamellé collé sont formées de lamelles superposées de même surface principale, les lamelles étant collées fil sur fil et formant des plans parallèles au plan de la lame de ressort, le fil du bois étant sensiblement parallèle à l'axe longitudinal de la lame. Une telle structure est très sensible aux défauts (noeuds, contrefils ...) éventuels d'une seule lamelle ainsi qu'à un défaut de collage ou de la tendance du plan de colle à fluer sous charge constante ou alternée. Glued laminated timber has found many uses in recent years. In addition to the traditional fields of furniture and construction, its applications in packaging, tools, sporting goods, etc. have diversified, and this is particularly the case with spring leaves. However, in general, the wooden leaf springs - or composite wood - glued laminated wood are formed of superimposed lamellae of the same main surface, the lamellae being glued wire on wire and forming planes parallel to the plane of the spring leaf, the wood grain being substantially parallel to the longitudinal axis of the blade. Such a structure is very sensitive to possible defects (knots, struts, etc.) of a single strip as well as to a defect in bonding or in the tendency of the glue plane to creep under constant or alternating load.
On a maintenant trouvé une nouvelle structure pour lames en bois lamellé collé, bien moins sensible aux défauts éventuels des lamelles et ayant des caractéristiques mécaniques intéressantes. We have now found a new structure for glued laminated wood slats, much less sensitive to possible defects in the slats and having interesting mechanical characteristics.
L'invention concerne donc une lame de ressort en bois ou bois composite lamellé collé, formée de lamelles collées sensiblement fil sur fil et disposées selon l'axe de la lame,le fil du bois étant sensiblement parallèle à l'axe longitudinal de la lame de ressort, caractérisée en ce que les plans de collage des lamelles sont perpendiculaires au plan de la lame de ressort. The invention therefore relates to a spring leaf made of glued laminated wood or composite wood, formed of glued lamellae substantially wire on wire and arranged along the axis of the blade, the wood wire being substantially parallel to the longitudinal axis of the blade. spring, characterized in that the gluing planes of the lamellae are perpendicular to the plane of the spring leaf.
De préférence, l'épaisseur des lamelles est comprise entre 0,4 et 12 mm, et plus particulièrement entre 2 et 6 mm. Preferably, the thickness of the strips is between 0.4 and 12 mm, and more particularly between 2 and 6 mm.
Les différentes lamelles de bois entrant dans la composition d'une même lame de ressort peuvent être d'épaisseur et d'essence différentes. The different strips of wood used in the composition of the same leaf spring can be of different thickness and essence.
Afin de modifier, notamment améliorer les caractéristiques mécaniques des lames de ressort, certaines lamelles peuvent être de nature différente, en particulier de tout matériau collable avec le bois tel qu'un métal, du caoutchouc, des matières plastiques, des tissus, des lamelles de bois à fil perpendiculaire au plan de la lame. Dans la lame composite ainsi obtenue, les lamelles de nature différente sont de préférence disposées de manière symétrique par rapport à l'axe de la lame de ressort afin d'éviter une torsion de la lame sous tension, par exemple sur les bords de la lame et éventuellement à l'intérieur, entre deux ou plusieurs lamelles de bois. Dans certains cas une telle disposition peut être avantageuse aussi du point de vue esthétique.Les lames de ressort peuvent avoir une section perpendiculaire à leur axe différente de celle d'un rectangle, par exemple arrondie sur les bords extérieurs ou découpée sur les bords latéraux. In order to modify, in particular to improve the mechanical characteristics of the spring leaves, certain strips may be of a different nature, in particular of any material which can be bonded with wood such as a metal, rubber, plastics, fabrics, strips of wood to wire perpendicular to the plane of the blade. In the composite blade thus obtained, the lamellae of a different nature are preferably arranged symmetrically with respect to the axis of the spring blade in order to avoid twisting of the blade under tension, for example on the edges of the blade. and possibly inside, between two or more strips of wood. In some cases such an arrangement can also be advantageous from an aesthetic point of view. The spring blades can have a section perpendicular to their axis different from that of a rectangle, for example rounded on the outer edges or cut out on the lateral edges.
Les lames de ressort selon l'invention peuvent être fabriquées de la manière suivante. The spring leaves according to the invention can be produced in the following manner.
Les lamelles de bois sont obtenues par sciage, déroulage ou tranchage à l'épaisseur voulue (par exemple de 0,4 à 12mm).Les lamelles sont collées les unes sur les autres en une seule ou en plusieurs opérations de collage. Les opérations de collage peuvent porter soit sur des lamelles ayant des dimensions (longueur et largeur) sensiblement égales à celles constituant une lame unique, soit sur des lamelles ayant des dimensions multiples, la lame de ressort étant alors obtenue par débit. La mise au profil de la section perpendiculaire à l'axe de la lame est obtenue soit lors du bâtissage par assemblage de lamelles de formes différentes soit par usinage d'une lame après collage.The wooden strips are obtained by sawing, peeling or slicing to the desired thickness (for example from 0.4 to 12mm). The strips are glued to each other in one or in several gluing operations. The bonding operations can be carried out either on strips having dimensions (length and width) substantially equal to those constituting a single strip, or on strips having multiple dimensions, the spring strip then being obtained by flow. The profile of the section perpendicular to the axis of the blade is obtained either during the building by assembling lamellae of different shapes or by machining a blade after bonding.
Si un profil particulier de la lame (par exemple courbe) est désiré, il peut être réalisé soit lors du collage des lamelles par collage sur une presse en forme, soit après collage par cintrage d'une lame déjà constituée, soit par débit dans une pièce plus importante, soit encore par usinage, ou par toute combinaison de ces différents procédés. If a particular profile of the blade (for example curved) is desired, it can be produced either when gluing the lamellae by gluing on a shaped press, or after gluing by bending an already formed blade, or by flow in a larger part, either by machining, or by any combination of these different processes.
La description suivante en regard des dessins annexés donne des exemples de réalisation de l'invention. The following description with reference to the appended drawings gives examples of embodiment of the invention.
La fig. 1 est une vue en perspective d'une lame de ressort du bois lamellé collé de l'état de la technique. Fig. 1 is a perspective view of a leaf spring of glued laminated wood of the state of the art.
La fig. 2 est une vue en perspective d'une lame de ressort en bois lamellé collé selon l'invention. Fig. 2 is a perspective view of a laminated wood spring leaf according to the invention.
La fig. 3 est une vue en perspective d'une lame de ressort en bois composite lamellé collé selon l'invention. Fig. 3 is a perspective view of a composite laminated wood spring leaf according to the invention.
La fig. 4 illustre 4 exemples de sections transversales de lames de ressort selon l'invention. Fig. 4 illustrates 4 examples of cross sections of spring leaves according to the invention.
La lame de ressort représentée schematiquement sur la fig. 2 est composée de 17 lamelles de hêtre déroulé à 3,5 mm d'épaisseur, ses dimensions étant de 10 mm d'épaisseur, 60 mm de largeur et 800 mm de longueur. Elle possède d'excellentes caractéristiques mécaniques. En particulier sa déformation permanente après 15 000 cycles de flexion dans les conditions simulant les sollicitations d'une latte de lit est 3 à 4 fois plus faible que celle d'une lame de ressort de mêmes dimensions extérieures constituée de 5 lamelles de hêtre de 2 mm d'épaisseur assemblées suivant la disposition classique représentée sur la fig. 1. The leaf spring shown diagrammatically in FIG. 2 is composed of 17 strips of beech unrolled to 3.5 mm thick, its dimensions being 10 mm thick, 60 mm wide and 800 mm long. It has excellent mechanical characteristics. In particular, its permanent deformation after 15,000 bending cycles under the conditions simulating the stresses of a bed slat is 3 to 4 times lower than that of a spring leaf of the same external dimensions made up of 5 beech strips of 2 mm thick assembled according to the conventional arrangement shown in fig. 1.
La lame de ressort en bois composite représentée sur la fig. 3 comprend des lamelles de bois 1 et des lamelles de polyuréthanne 2 disposées de manière symétrique par rapport à l'axe de la lame, sur les bords et le milieu de la lame. The composite wood spring leaf shown in fig. 3 comprises wooden strips 1 and polyurethane strips 2 arranged symmetrically with respect to the axis of the blade, on the edges and the middle of the blade.
Les lames de ressort selon l'invention ont d'excellentes caractéristiques et un faible coût de fabrication et peuvent être utilisées dans l'ameublement, notamment dans la fabrication de lattes pour sièges, sommiers de lits, canapés, etc ..., dans l'emballage, notamment dans la fabrication de palettes, caisses, éléments de renfort d'emballages composites, etc, dans les articles de sports et d'une façon générale dans tout ce qui nécessite l'utilisation de ressorts (navigation de plaisance, avions et planeurs légers, sulky, industrie du jouet, etc ...). The spring leaves according to the invention have excellent characteristics and a low manufacturing cost and can be used in furniture, in particular in the manufacture of slats for seats, bed bases, sofas, etc ... packaging, in particular in the manufacture of pallets, cases, reinforcing elements for composite packaging, etc., in sports articles and in general in all that requires the use of springs (boating, airplanes and light gliders, sulky, toy industry, etc ...).
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8508787A FR2582980B1 (en) | 1985-06-11 | 1985-06-11 | ADHESIVE WOOD SPRING BLADE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8508787A FR2582980B1 (en) | 1985-06-11 | 1985-06-11 | ADHESIVE WOOD SPRING BLADE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2582980A1 true FR2582980A1 (en) | 1986-12-12 |
FR2582980B1 FR2582980B1 (en) | 1987-09-18 |
Family
ID=9320083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8508787A Expired FR2582980B1 (en) | 1985-06-11 | 1985-06-11 | ADHESIVE WOOD SPRING BLADE |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2582980B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0549526A1 (en) * | 1991-12-20 | 1993-06-30 | Studio Hüsler Ag | Slat made of solid wood |
US8622473B2 (en) | 2008-06-05 | 2014-01-07 | Susan Walsh | Inclusive chair |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2118048A (en) * | 1937-03-29 | 1938-05-24 | Timber Engineering Co | Laminated structure |
FR828727A (en) * | 1937-11-05 | 1938-05-27 | Ski composed of two or more layers and method of manufacturing this ski | |
GB565723A (en) * | 1943-02-17 | 1944-11-24 | Ernest Platton King | Improvements in the production of springy wooden appliances |
DE833905C (en) * | 1949-04-23 | 1952-03-13 | Gotthilf Benz | Diving board for swimming pools |
CH504860A (en) * | 1969-03-07 | 1971-03-31 | Metzger Josef | Lättli, in particular for seating and reclining furniture |
US4332384A (en) * | 1978-05-25 | 1982-06-01 | Nippon Gakki Seizo Kabushiki Kaisha | Wooden racket frame |
EP0065087A1 (en) * | 1981-05-19 | 1982-11-24 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Flexing spring of compound fibre material |
-
1985
- 1985-06-11 FR FR8508787A patent/FR2582980B1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2118048A (en) * | 1937-03-29 | 1938-05-24 | Timber Engineering Co | Laminated structure |
FR828727A (en) * | 1937-11-05 | 1938-05-27 | Ski composed of two or more layers and method of manufacturing this ski | |
GB565723A (en) * | 1943-02-17 | 1944-11-24 | Ernest Platton King | Improvements in the production of springy wooden appliances |
DE833905C (en) * | 1949-04-23 | 1952-03-13 | Gotthilf Benz | Diving board for swimming pools |
CH504860A (en) * | 1969-03-07 | 1971-03-31 | Metzger Josef | Lättli, in particular for seating and reclining furniture |
US4332384A (en) * | 1978-05-25 | 1982-06-01 | Nippon Gakki Seizo Kabushiki Kaisha | Wooden racket frame |
EP0065087A1 (en) * | 1981-05-19 | 1982-11-24 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Flexing spring of compound fibre material |
Non-Patent Citations (1)
Title |
---|
ENGINEERING, no. 2, février 1979, pages 170-173, Londres, GB; H.E.MUNN: "Enineering design of skis" * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0549526A1 (en) * | 1991-12-20 | 1993-06-30 | Studio Hüsler Ag | Slat made of solid wood |
US8622473B2 (en) | 2008-06-05 | 2014-01-07 | Susan Walsh | Inclusive chair |
Also Published As
Publication number | Publication date |
---|---|
FR2582980B1 (en) | 1987-09-18 |
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Legal Events
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CA | Change of address | ||
CD | Change of name or company name | ||
ST | Notification of lapse |