WO1991015978A1 - Hinged seat made of a plastics material, and moulding method for producing same - Google Patents

Hinged seat made of a plastics material, and moulding method for producing same Download PDF

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Publication number
WO1991015978A1
WO1991015978A1 PCT/FR1991/000311 FR9100311W WO9115978A1 WO 1991015978 A1 WO1991015978 A1 WO 1991015978A1 FR 9100311 W FR9100311 W FR 9100311W WO 9115978 A1 WO9115978 A1 WO 9115978A1
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WO
WIPO (PCT)
Prior art keywords
seat
backrest
during
arm
bearing
Prior art date
Application number
PCT/FR1991/000311
Other languages
French (fr)
Inventor
Gilbert Pasutto
Original Assignee
Allibert S.A.
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 Allibert S.A. filed Critical Allibert S.A.
Publication of WO1991015978A1 publication Critical patent/WO1991015978A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0017—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor moulding interconnected elements which are movable with respect to one another, e.g. chains or hinges
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement

Definitions

  • the present invention relates to a plastic seat, of the type comprising at least two parts interconnected by means of articulation, in this case it is artici cu l er, or the back r of the seat reclining according to at least two positions comprising, a fixed part, constituted by a seat, provided with support legs on the self relative to a movable part constituted by a backrest to be connected to said seat, or the backrest of the same seat reclining with respect to lateral arms or armrests sometimes also constituting retaining and adjusting means interposed between said backrest and the seat in an articulated manner, or else the various parts constituting a folding seat.
  • the seat consists on the one hand of two frames capable of being hinged together at an angle from a folded position to an open position, so that in this position, the lateral branches of the frames constitute supporting feet, and on the other hand by a seat articulated between the branches of one of the frames, capable of oscillating from a vertical storage position to a horizontal position of use.
  • the means of articulation of these different types of seat generally consist of a pin secured to one of the parts to be connected, capable of pivoting in a housing forming a bearing formed on the other part to be connected in such a way as to constitute a hinge.
  • the object of the present invention is precisely to achieve this objective so as to reduce both the manufacturing costs but also the assembly costs.
  • the invention relates to a seat of plastic material of the type comprising at least two parts connected together by articulation means, constituted by at least one pin of one of the parts, capable of pivoting. in a housing forming a bearing of the other part, so as to constitute a hinge.
  • the spindle and the bearing are obtained respectively with the corresponding parts of the seat during the same injection molding operation in a single mold.
  • the invention also relates to a molding process for obtaining such a seat, characterized in that a removable tubular insert is disposed in the mold of the seat parts to be injected, in the area of the articulation means and whose ; its internal wall defines a housing corresponding to the spindle to be obtained with one of the parts; its outer wall corresponds to the bearing to be obtained with the other party; and the thickness of its wall corresponds to a clearance remaining between the parts after demolding of said insert.
  • the removable tubular insert has an oval section of dimensions such that its internal height corresponds substantially to its external width, so that the clearance obtained as a result of its own thickness, in a given position molding, or compensated in a selected position of use after demolding, by relative pivoting of the spindle relative to the bearing thus obtained.
  • the i ns erttub ula ire removable consists of a plurality of sectors arranged in a crown and spaced between them by interstices capable of allowing, during molding, obtaining longitudinal branches axial coming from material with the spindle and in breakable connection by their top with the bearing; which corresponds to the outer wall of the crown of sectors constituting said insert; the height of the branches being identical to the thickness of the sectors so that. use, after breaking their top, they compensate for the clearance obtained as a result of the thickness of the sectors constituting the insert.
  • FIG. 1 is a schematic perspective view illustrating the molding process of two seat parts articulated between them, according to the invention.
  • Figures 2 and 3 have views showing the joint obtained according to the method of Figure 1 respectively in the position of mo ulage and in the position of use.
  • FIG. 4 is a schematic perspective view illustrating the molding process of two seat parts hinged together according to a variant of the invention.
  • FIG. 5 is a perspective view of an articulated seat, o b teun a u c o ur s u n op e r ti o n uniq u e mo u l ag e according to the process of the invention.
  • FIG. 6 is a perspective view of a seat called "deckchair” obtained according to the method of the invention.
  • FIG. 7 is a perspective view of a variant of realization of an articulated seat, obtained during a single molding operation according to the method of the invention.
  • FIG. 8 is a plan view of a seat according to Figure 7 immediately after molding.
  • Figure 1 illustrates in principle the living room molding process an example of implementation for obtaining any two parts 1 and 2, a seat to be obtained, connected together by means of articulation, constituted by a pin 3 of one of the parts 2, capable of pivoting in a housing forming a bearing 4 of the other part 1, so as to constitute a hinge.
  • the spindle 3 and the bearing 4 are respectively obtained with the parts 2 and 1 during the same molding operation, in a single mold (not shown), thanks to a simultaneous injection via two injectors 5, G distributing an inlet for molding material coming from a common trunk 7.
  • a removable tubular insert 8 is placed in the mold of the parts 1, 2 of the seat to be obtained, in the area of the articulation means to be produced.
  • the internal wall 9 of the removable tubular insert 8 defines a housing 10 corresponding in its shape and in its dimensions to the pin 8 to be obtained with part 2 of the seat, the outer wall 1 1 of said insert 8 corresponds to the staircase 4 to be obtained and the thickness "e" of appear 12 corres lays in a clearance "e1" remaining between the parts 1, 2 after demolding of said removable tubular insert 8.
  • the insert 8 shown in FIG. 1 has an oval section whose internal height "h” of its housing 10, equal to the height "h1" of the spindle 3, corresponds to its external width "1", equal to the width "11" of the bearing 4.
  • the clearance "e1” obtained as a result of the own thickness "e” of the insert 8, in a given molding position (fig 2 ) is compensated, in a selected position of use after demolding (fig 3), by relative pivoting at an angle of the spindle 3 relative to the bearing 4, around the axis XX 'passing through the center C.
  • the method of obtaining a seat according to the invention essentially differs from the previous one in that the removable tubular insert 20 consists of a plurality of sectors 21, in this case four in number, evenly distributed and arranged in a circular crown and spaced apart, in the mold, by interstices 22 suitable for allowing, during molding, the obtaining of longitudinal longitudinal branches 23 coming from material with a pin 24 and in secabi ⁇ connection by their top 23a with the bearing 25.
  • the bearing 25 corresponds to the external wall 20 of the ring of sectors 21 constituting the removable tubular insert 20.
  • the height "H” of the branches 23 is identical to the thickness "E" of the sectors 21, so that in use, after breaking their apex 23a in thickness with the bearing 25, they compensate for the play "E1" obtained as a result of the own thickness " E "of the sectors 21 constituting the insert 25.
  • FIG. 5 shows an example of application of the invention consisting of a reclining seat comprising in a known manner a fixed part constituted by a seat 30 provided with support legs 31, resting on the ground and a mobile part constituted by a backrest 32 connected to the seat 30 by articulation means according to the invention, constituted by a pin 3 secured to the backrest 32 and a bearing 4 secured to the seat 30, the seat and its articulations being obtained during the same operation injection molding in a single mold.
  • FIG. 6 shows a second example of application of the invention consisting of a so-called “deckchair” which differs from the previous one only as regards its design specific to its particular use, known per se.
  • Figure 7 shows according to a third example of application of the invention a seat called "folding" or “folding chair” formed in a manner known per se of two frames 40, 41 capable of being hinged together at an angle ranging from 'a folded position to an open position, as shown in the figure, so that in this pc ⁇ sition, the lateral branches 40a, 40b and 41a, 41b of said frames 40, 41 constitute carrier piods on the ground through through the end branches 40c, 41c, the autros, end branches of the frames 40, 41 merging around an axis XX 'to form a backrest 42.
  • the seat according to FIG. 7 also consists of a seat 43 articulated around an axis YY 'parallel to the axis XX' and capable of oscillating between the branches 40a and 40b of the frame 40, from a vertical position of storage in a horizontal position for use.
  • Two lugs 46 also obtained from molding on the branches 41a, 41b of the frame 41 ensure the blocking of the seat 43 in the position of use.
  • Figure 8 shows in plan, immediately after demolding, a seat according to this last example, illustrating well the advantage provided by the invention, namely obtaining an articulated seat, in a single molding operation.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A seat of the kind which comprises at least two portions (1, 2) connected to each other by a hinge device consisting of at least one pin (3, 24) on one of the portions (2), said pin being able to turn in a housing forming a bearing (4, 25) on the other portion (1) so as to form a hinge. The pin (3, 24) and the bearing (4, 25) are obtained along with the two portions (1, 2 respectively) of the chair during a single injection moulding operation using a single mould. In one embodiment, the movable tubular insert (8) has an oval cross-section and a size such that its internal height (h) substantially corresponds to its external breadth (1), and therefore that the gap (e1) created as a result of its own thickness (e) in a given moulding position is compensated, in a selected position when in use and after removed from the mould, by a relative pivotal movement between the pin (3) and the bearing (4) thereby obtained. Applications: garden furniture.

Description

SIEGE EN MATIERE PLASTIQUE ARTICULE ET PROCEDE DE MOULAGE D'OBTENTION D'UN TEL SIEGE  ARTICULATED PLASTIC SEAT AND MOLDING METHOD FOR OBTAINING SUCH A SEAT
La présenta invention concerne un siège en matière plastique, du type comportant au moins deux parties reliées entre elles par des moyens d'articulation, en l'occurence il s'agit d'arti cu l er, soit le dossie r du siège inclinable selon au moins deux positions comprenant, une partie fixe , constituée par une assise, munie de pieds porteurs sur le soi par rapport à une partie mobile constituée par un dossier à relier à ladite assise, soit le dossier d'un même siège inclinable par rapport à des bras ou accoudoirs latéraux constituant parfois également des moyens de retenue et de réglage interposés entre ledit dossier et l'assise de manière articulée, ou encore les différentes parti es constitutives d'u n siè ge pliant. The present invention relates to a plastic seat, of the type comprising at least two parts interconnected by means of articulation, in this case it is artici cu l er, or the back r of the seat reclining according to at least two positions comprising, a fixed part, constituted by a seat, provided with support legs on the self relative to a movable part constituted by a backrest to be connected to said seat, or the backrest of the same seat reclining with respect to lateral arms or armrests sometimes also constituting retaining and adjusting means interposed between said backrest and the seat in an articulated manner, or else the various parts constituting a folding seat.
Dans ce dernier cas de figure, le siège est constitué d'une part de deux cadres susceptibles d'être articulés entre eux selon un angle allant d'une position repliée a une position d'ouverture, de manière à ce que dans cette position, lesbranches latérales desdi ts cadres constituent des pieds porteurs, et d'autre part par une assise articulée entre lesbranches d'un des cadres, susceptible d'osciller d'une posi¬tion verticale de rangement à une position horizontale d'uti¬ligation. Les moyens d'articulation de ces différents types de siège, cités à titre d'exemples non limitatifs, sont généralement constitués par une broche solidaire d'une des parties à relier, susceptible de tourillonner dans un logement formant un palier ménagé sur l'autre partie à relier de manière telle à constituer une charnière. In the latter case, the seat consists on the one hand of two frames capable of being hinged together at an angle from a folded position to an open position, so that in this position, the lateral branches of the frames constitute supporting feet, and on the other hand by a seat articulated between the branches of one of the frames, capable of oscillating from a vertical storage position to a horizontal position of use. The means of articulation of these different types of seat, cited by way of nonlimiting examples, generally consist of a pin secured to one of the parts to be connected, capable of pivoting in a housing forming a bearing formed on the other part to be connected in such a way as to constitute a hinge.
De manière classique, les éléments d'une telle charnière, à savoir la broche et le palier, sont obtenus avec chacune de leurs parties, au cours d'une opération de moulage effectuée pour chaque partie de manière indépendante, leur assemblage s'effectuant après démoulage de chacune d'elles.  Conventionally, the elements of such a hinge, namely the spindle and the bearing, are obtained with each of their parts, during a molding operation carried out for each part independently, their assembly being effected after demoulding of each of them.
Il est aussi connu de prévoir un logement sur chaque pièce à assembler, de manière à pouvoir les aligner axialement au montage et les solidariser par une broche rapportée. It is also known to provide a housing on each part to be assembled, so as to be able to align them axially during assembly and to secure them by an attached pin.
La réalisation de ces articulations, à quelque niveau que ce soit implique par conséquent la mise en oeuvre parfois de pièces annexes, mais surtout entraine une multiplicité des opérations de moulage pour fabriquer chaque partie de siège individuellement et exclut par conséquent tout moulage de celui-ci en une seule opération. The realization of these joints, at any level whatsoever therefore implies the implementation sometimes of ancillary parts, but above all leads to a multiplicity of molding operations to manufacture each seat part individually and therefore excludes any molding thereof. in one operation.
Le but de la présente invention est précisémment d'atteindre cet objectif de manière à réduire à la fois les coûts de fabrication mais aussi les coûts de montage.  The object of the present invention is precisely to achieve this objective so as to reduce both the manufacturing costs but also the assembly costs.
A cet effet , l' invention concerne un siège en matière plastique du type comportant au moins deux parties reliées entre elles par des moyens d'articulation, constitués par au moins une broche de l'une des parties, susceptible de tourillonner dans un logement formant un palier de l'autre partie, de manière telle à constituer une charnière . To this end, the invention relates to a seat of plastic material of the type comprising at least two parts connected together by articulation means, constituted by at least one pin of one of the parts, capable of pivoting. in a housing forming a bearing of the other part, so as to constitute a hinge.
Selon la caractéristique principale de l'invention, la broche et le palier sont obtenus respectivement avec les parties du siège correspondantes au cours d'une même opération de moulage par injection dans un moule unique.  According to the main characteristic of the invention, the spindle and the bearing are obtained respectively with the corresponding parts of the seat during the same injection molding operation in a single mold.
L'invention concerne également un procédé de moulage pour l'obtention d'un tel siège, se caractérisant en ce qu'un insert tubulaire amovible est disposé dans le moule des parties de siège à injecter, dans la zone des moyens d'articulation et dont ; sa paroi interne définit un logement correspondant à la broche à obtenir avec l'une des parties ; sa paroi externe correspond au palier à obtenir avec l'autre partie ; et l'épaisseur de sa paroi correspond à un jeu subsistant entre les parties après démoulage dudit insert.  The invention also relates to a molding process for obtaining such a seat, characterized in that a removable tubular insert is disposed in the mold of the seat parts to be injected, in the area of the articulation means and whose ; its internal wall defines a housing corresponding to the spindle to be obtained with one of the parts; its outer wall corresponds to the bearing to be obtained with the other party; and the thickness of its wall corresponds to a clearance remaining between the parts after demolding of said insert.
Selon une variante de réalisation, l'insert tubulaire amovible a une section ovale de dimensions telles à ce que sa hauteur interne corresponde sensiblement à sa largeur externe, de manière à ce que le jeu obtenu en conséquence de sa propre épaisseur, dans une position donnée de moulage, soit compensée dans une position choisie d'utilisation après démoulage, par pivotement relatif de la broche par rapport au palier ainsi obtenu. According to an alternative embodiment, the removable tubular insert has an oval section of dimensions such that its internal height corresponds substantially to its external width, so that the clearance obtained as a result of its own thickness, in a given position molding, or compensated in a selected position of use after demolding, by relative pivoting of the spindle relative to the bearing thus obtained.
S e l on une autre v ari an te de r éa li sa t i o n , l' i ns e r t t u b ula i r e amovible est constitué d' une pluralité de secteurs disposés en couronne et espacés entre eux d'interstices aptes à permettre, lors du moulage, l'obtention de branches longitudi¬nales axiales venues de matière avec la broche et en liaison secable par leur sommet avec le palier ; lequel correspond à la paroi externe de la couronne de secteurs constituant ledit insert ; la hauteur des branches étant identique à l'épaisseur des secteurs de manière à ce qu' en. utilisation, après cassure de leur sommet, elles compensent le jeu obtenu en conséquence de la propre épaisseur des secteurs constituant l'insert. If there is another v ari an te of re a lia tion, the i ns erttub ula ire removable consists of a plurality of sectors arranged in a crown and spaced between them by interstices capable of allowing, during molding, obtaining longitudinal branches axial coming from material with the spindle and in breakable connection by their top with the bearing; which corresponds to the outer wall of the crown of sectors constituting said insert; the height of the branches being identical to the thickness of the sectors so that. use, after breaking their top, they compensate for the clearance obtained as a result of the thickness of the sectors constituting the insert.
L'invention sera encore illustrée sans être aucunement limitée par la description qui suit, faite en regard des dessins annexés sur lesquels:  The invention will be further illustrated without being in any way limited by the description which follows, given with reference to the appended drawings in which:
- la figure 1 est une vue schématique en perspective illustrant le procédé de moulage de deux parties de siège articulées entre ell es, selon l 'invention. - Figure 1 is a schematic perspective view illustrating the molding process of two seat parts articulated between them, according to the invention.
- les figures 2 et 3 ont des vues montrant l' articulation obtenue selon le procédé de la figure 1 respectivement en position de mo ulage et en position d' utilisation.  - Figures 2 and 3 have views showing the joint obtained according to the method of Figure 1 respectively in the position of mo ulage and in the position of use.
- la figure 4 est une vue schématique en perspective illustrant le procédé de moulage de deux parties de siège articulées entre elles selon une variante de l'invention.  - Figure 4 is a schematic perspective view illustrating the molding process of two seat parts hinged together according to a variant of the invention.
- la figure 5 est une vue en perspective d'un siège articulé, o b teun a u c o ur s d'u n op e r a ti o n uniq u e de mo u l ag e selon l eprocedé de l'invention.  - Figure 5 is a perspective view of an articulated seat, o b teun a u c o ur s u n op e r ti o n uniq u e mo u l ag e according to the process of the invention.
- la figure 6 est une vue en perspective d'un siège dit "transat" obtenu selon le procédé de l'invention.  - Figure 6 is a perspective view of a seat called "deckchair" obtained according to the method of the invention.
- la figure 7 est une vue en perspective d'une variante de réalisation d'un siège articulé, obtenu au cours d'une opération unique de moulage selon le procédé de l'invention. - Figure 7 is a perspective view of a variant of realization of an articulated seat, obtained during a single molding operation according to the method of the invention.
- la figure 8 est une vue en plan d'un siège selon le figure 7 immédiatement issu du moulage.  - Figure 8 is a plan view of a seat according to Figure 7 immediately after molding.
La figure 1 illustre dans son principe le procédé de moulage salon un exemple de mise en oeuvre pour l'obtention de deux parties 1 et 2 quelconques, d'un siège à obtenir, reliées entre elles par des moyens d'articulation, constitués par une broche 3 de l'une des parties 2, susceptible de tourillonner dans un logement formant un palier 4 de l'autre partie 1 , de manière telle à constituer une charnière.  Figure 1 illustrates in principle the living room molding process an example of implementation for obtaining any two parts 1 and 2, a seat to be obtained, connected together by means of articulation, constituted by a pin 3 of one of the parts 2, capable of pivoting in a housing forming a bearing 4 of the other part 1, so as to constitute a hinge.
Selon l'invention, la broche 3 et le palier 4 sont respectivement obtenus avec les parties 2 et 1 au cours d'une même opération de moulage, dans un moule unique (non représenté), grâce à une injection simultanée par l'intermédiaire de deux injecteurs 5, G répartissant une arrivée de matière de moulage issue d' un tronc commun 7.  According to the invention, the spindle 3 and the bearing 4 are respectively obtained with the parts 2 and 1 during the same molding operation, in a single mold (not shown), thanks to a simultaneous injection via two injectors 5, G distributing an inlet for molding material coming from a common trunk 7.
Pour la mise en oeuvre d'un procédé d'obtention d'un tel siège, un insert tubulaire amovible 8 est disposé dans le moule des parties 1, 2 du siège a obtenir, dans la zone des moyensd'articulation à réaliser. For the implementation of a process for obtaining such a seat, a removable tubular insert 8 is placed in the mold of the parts 1, 2 of the seat to be obtained, in the area of the articulation means to be produced.
Selon un premier mode de realisation desdits moyens d'articulation (fig.1), la paroi interne 9 de l'insert tubulaireamovible 8 dcfinit un logement 10 correspondant dars sa formeet dans ses dimensions à la broche 8 à obtenir avec la partie2 du siège, la paroi externe 1 1 dudit insert 8 correspond aupalier 4 à obtenir et l'spaisseur "e" de se paror 12 corres pond à un jeu "e1" subsistant entre les parties 1, 2 après démoulage dudit insert tubulaire amovible 8. According to a first embodiment of said articulation means (FIG. 1), the internal wall 9 of the removable tubular insert 8 defines a housing 10 corresponding in its shape and in its dimensions to the pin 8 to be obtained with part 2 of the seat, the outer wall 1 1 of said insert 8 corresponds to the staircase 4 to be obtained and the thickness "e" of appear 12 corres lays in a clearance "e1" remaining between the parts 1, 2 after demolding of said removable tubular insert 8.
Plus particulièrement, l'insert 8 représenté à la figure 1, a une section ovale dont la hauteur interne "h" de son logement 10, égale à la hauteur "h1" de la broche 3, correspond à sa largeur extérieure "1", égale à la largeur "11" du palier 4. De cette manière (fig 2 et 3) le jeu "e1" obtenu en conséquence de la propre épaisseur "e" de l'insert 8, dans une position donnée de moulage (fig 2) est compensée, dans une position choisie d'utilisation après démoulage (fig 3), par pivotement relatif selon un angle de la broche 3 par rapport au palier 4, autour de l'axe XX' passant par le centre C.  More particularly, the insert 8 shown in FIG. 1 has an oval section whose internal height "h" of its housing 10, equal to the height "h1" of the spindle 3, corresponds to its external width "1", equal to the width "11" of the bearing 4. In this way (fig 2 and 3) the clearance "e1" obtained as a result of the own thickness "e" of the insert 8, in a given molding position (fig 2 ) is compensated, in a selected position of use after demolding (fig 3), by relative pivoting at an angle of the spindle 3 relative to the bearing 4, around the axis XX 'passing through the center C.
Selon un second mode de réalisation desdits moyens d'articulation représentés à la figure 4, le procédé d'obtention d'un siège selon l'invention diffère essentiellement du précédent en ce que l'insert tubulaire amovible 20 est constitué d'un pluralité de secteurs 21, en l'occurence au nombre de quatre, équitablement répartis et disposés en couronne circulaire et espacés entre eux, dans le moule, par des interstices 22 aptes à permettre, lors du moulage, l'obtention de branches longitudinales axiales 23 venues de matière avec une broche 24 et en liaison secabiε par leur sommet 23a avec le palier 25. According to a second embodiment of said articulation means shown in FIG. 4, the method of obtaining a seat according to the invention essentially differs from the previous one in that the removable tubular insert 20 consists of a plurality of sectors 21, in this case four in number, evenly distributed and arranged in a circular crown and spaced apart, in the mold, by interstices 22 suitable for allowing, during molding, the obtaining of longitudinal longitudinal branches 23 coming from material with a pin 24 and in secabiε connection by their top 23a with the bearing 25.
comme dans le cas précédcnt, le palier 25 correspond à la paroi externa 20 de la couronne de secteurs 21 consituant l'insert tubulaire amovible 20. as in the previous case, the bearing 25 corresponds to the external wall 20 of the ring of sectors 21 constituting the removable tubular insert 20.
Dans le présent cas de fighur, la hauteur "H" des branches 23 est identique à l'épaisseur "E" des secteurs 21, de manière à ce qu'en utilisation, après cassure de leur sommet 23a en laison avec le palier 25, elles compensent le jeu "E1" obtenu en conséquence de la propre épaisseur "E" des secteurs 21 constituant l'insert 25. In the present case of fighur, the height "H" of the branches 23 is identical to the thickness "E" of the sectors 21, so that in use, after breaking their apex 23a in thickness with the bearing 25, they compensate for the play "E1" obtained as a result of the own thickness " E "of the sectors 21 constituting the insert 25.
La figure 5 montre un exemple d'application de l'invention consistant en un siège inclinable comprenant de manière connue une partie fixe constituée par une assise 30 munie de pieds porteurs 31, reposant sur le sol et une partie mobile constituée par un dossier 32 relié à l'assise 30 par des moyens d'articulation selon l'invention, constitués par une broche 3 solidaire du dossier 32 et un palier 4 solidaire de l'assise 30, le siège et ses articulations étant obtenus au cours d'une même opération de moulage par injection dans un moule unique.  FIG. 5 shows an example of application of the invention consisting of a reclining seat comprising in a known manner a fixed part constituted by a seat 30 provided with support legs 31, resting on the ground and a mobile part constituted by a backrest 32 connected to the seat 30 by articulation means according to the invention, constituted by a pin 3 secured to the backrest 32 and a bearing 4 secured to the seat 30, the seat and its articulations being obtained during the same operation injection molding in a single mold.
La figure 6 montre un second exemple d'application de l'invention consistant en un siège dit "transat" qui ne diffère du précédent qu'en ce qui concerne sa conception propre à son utililsation particulière, connue en soi.  FIG. 6 shows a second example of application of the invention consisting of a so-called "deckchair" which differs from the previous one only as regards its design specific to its particular use, known per se.
La figure 7 montre selon un troisième exemple d'application de l'invention un siège dit "pliant" ou "chaise pliante" formé de manière connue en soi de deux cadres 40, 41 susceptibles d'être articulés entre eux selon un angle allant d'une position repliée àune position d'ouverture, telle que représentée sur la figure, de manière à ce que dans cette pc¬sition, les branches latérales 40a, 40b et 41a, 41b desdits cadres 40, 41 constituent des piods porteurs sur le sol par l'intermédiaire des branches d'extrémité 40c, 41c, les autros, branches d'extrémité des cadres 40, 41 se confondant autour d'un axe XX' pour former un dossier 42. Figure 7 shows according to a third example of application of the invention a seat called "folding" or "folding chair" formed in a manner known per se of two frames 40, 41 capable of being hinged together at an angle ranging from 'a folded position to an open position, as shown in the figure, so that in this pc¬sition, the lateral branches 40a, 40b and 41a, 41b of said frames 40, 41 constitute carrier piods on the ground through through the end branches 40c, 41c, the autros, end branches of the frames 40, 41 merging around an axis XX 'to form a backrest 42.
Le siège selon la figure 7 est également constitué d'une assise 43 articulée autour d'un axe YY' parallèle à l'axe XX' et susceptible d'osciller entre les branches 40a et 40b du cadre 40, d'une position verticale de rangement à une position horizontale d'utilisation.  The seat according to FIG. 7 also consists of a seat 43 articulated around an axis YY 'parallel to the axis XX' and capable of oscillating between the branches 40a and 40b of the frame 40, from a vertical position of storage in a horizontal position for use.
Le pivotement des cadres 40, 41 entre eux sur l'axe XX' ainsi que l'articulation de l'assise 43 par rapport au cadre 40 sur l'axe YY' s'effectuent par des moyens d'articulation respec tivement 44, 45, symbolisés sur la figure, mais obtenus selon le procédé de l'invention ci-dessus décrit et illustré par les figures 1 à 4.  The pivoting of the frames 40, 41 between them on the axis XX 'as well as the articulation of the seat 43 relative to the frame 40 on the axis YY' are effected by means of articulation respectively 44, 45 , symbolized in the figure, but obtained according to the method of the invention above described and illustrated by Figures 1 to 4.
Deux ergots 46 obtenus également de moulage sur les branches 41a, 41b du cadre 41 assurent le blocage de l'assise 43 en position d'utilisation.  Two lugs 46 also obtained from molding on the branches 41a, 41b of the frame 41 ensure the blocking of the seat 43 in the position of use.
La figure 8 montre en plan, immédiatement après démoulage, un siège selon ce dernier exemple, illustrant bien l'avantage procuré par l'invention à savoir l'obtention d'un siège articulé, en une opération de moulage unique.  Figure 8 shows in plan, immediately after demolding, a seat according to this last example, illustrating well the advantage provided by the invention, namely obtaining an articulated seat, in a single molding operation.
De plus, dans le présent exemple concernant une chaise pliante, il est à noter que le moule est plat et donc d'encombrement très réduit.  In addition, in the present example concerning a folding chair, it should be noted that the mold is flat and therefore very compact.
On peut également imaginer, étant donné la simplicité dudit moule, de concevoir un installation de moulage permettant de (mouler plusieurs sièges au cours d'une même opération.  One can also imagine, given the simplicity of said mold, to design a molding installation making it possible to (mold several seats during the same operation.

Claims

REVENDICATIONS
1/ Siège en matière plastique inclinable (1) selon au moins deux positions comprenant une partie fixe, constituée par une assise (2) munie de pieds porteurs (3) sur le sol et une partie mobile constituée par un dossier (4) relié à l'assise (2), d'une part par des moyens d'articulation entre une partie arrière (2a) de l'assise (2) et une partie inférieure (4a) du dossier, et d'autre part par des moyens de retenue et de réglage articulés disposés au moins d'un côté du siège (1) entre ledit dossier (4) et ladite assise (2) caractérisé en ce qu'au moins une de ses articulations est constituée par un voile (5, 8, 11) formant charnière, obtenu au cours d'une même opération de moulage avec les parties à articuler entre elles. 2/ Siège en matière plastique selon la revendication 1 caractérisé en ce que les moyens de retenue et de réglage du dossier (4) par rapport à l'assise (2) sont constitués par au moins un bras (6, 7) articulé par une de ses extrémités (6a) sur le dossier (4) par l'intermédiaire d'un voile (8) formant une charnière transversale apte à se déformer angul ai rement au cours d'une opération de réglage du dossier (4) par rapport à l'assise (2) et ancré à son autre extrémité libre (6b, 7b) à un élément fixe (9, 10) de ladite assise (2). 1 / Reclining plastic seat (1) in at least two positions comprising a fixed part, constituted by a seat (2) provided with support legs (3) on the ground and a mobile part constituted by a backrest (4) connected to the seat (2), on the one hand by means of articulation between a rear part (2a) of the seat (2) and a lower part (4a) of the backrest, and on the other hand by means of articulated restraint and adjustment disposed at least on one side of the seat (1) between said backrest (4) and said seat (2) characterized in that at least one of its articulations is constituted by a web (5, 8, 11) forming a hinge, obtained during the same molding operation with the parts to be hinged together. 2 / plastic seat according to claim 1 characterized in that the means for retaining and adjusting the backrest (4) relative to the seat (2) consist of at least one arm (6, 7) articulated by a of its ends (6a) on the backrest (4) by means of a web (8) forming a transverse hinge capable of deforming angularly during an adjustment operation of the backrest (4) relative to the seat (2) and anchored at its other free end (6b, 7b) to a fixed element (9, 10) of said seat (2).
3/ Siège selon la revendication 2 caractérisé en ce qu'il est obtenu de manière monobloc au cours d'une même opération de moulage de matière plastique. 4/ Siège selon la revendication 2 caractérisé en ce que le dossier (4) et le bras (6, 7) sont obtenus de manière monobloc au cours d'une même opération de moulage de matière plastique, pour constituer une première partie (1A) du siège (1) reliée à l'assise (2) constituant une deuxième partie (1B) dudit siège (1) par des moyens d'articulation (18, 19) connus en soi. 3 / seat according to claim 2 characterized in that it is obtained in a single piece during a single plastic molding operation. 4 / seat according to claim 2 characterized in that the backrest (4) and the arm (6, 7) are obtained in a single piece during the same plastic molding operation, to form a first part (1A) of the seat (1) connected to the seat (2) constituting a second part (1B) of said seat (1) by articulation means (18, 19) known per se.
5/ Siège selon l'une des revendications 2 à 4 caractérisé en ce que l'ancrage du bras (6, 7) sur l'élément fixe (9, 10) de l'assise est assuré par au moins deux logements (12, 13) pratiqués à l'extrémité libre (6a, 7a) du bras (6, 7), aptes à s'engager au cours d'une opération de réglage, sur un axe correspondant (17) de l'élément fixe (9, 10) de l'assise (2). 6/ Siège selon l'une des revendications 2 à 5 caractérisé en ce que les bras (6, 7) sont obtenus de moulage avec le dossier (4), selon une position relative par rapport audit dossier (4), et à l'assise (2), telle à pouvoir être amenés en coopération avec les éléments (9, 10) formant des montants sensiblement perpendiculaires à l'assise (2) sous contrainte élastique, lors de leurs fixations initiales ou lors d'un réglage. 5 / seat according to one of claims 2 to 4 characterized in that the anchoring of the arm (6, 7) on the fixed element (9, 10) of the seat is ensured by at least two housings (12, 13) formed at the free end (6a, 7a) of the arm (6, 7), capable of engaging during an adjustment operation, on a corresponding axis (17) of the fixed element (9, 10) of the seat (2). 6 / seat according to one of claims 2 to 5 characterized in that the arms (6, 7) are obtained by molding with the backrest (4), in a relative position relative to said backrest (4), and to the seat (2), such that it can be brought in cooperation with the elements (9, 10) forming uprights substantially perpendicular to the seat (2) under elastic stress, during their initial fastenings or during an adjustment.
7/ Siège selon l'une des revendications 2 à 6 caractérisé en ce que l'axe d'ancrage (17) de chaque bras (6, 7) traverse et débouche de part et d'autre du montant de l'assise (9, 10) pour constituer deux goujons (17A, 17B) dans lesquels s'ancre une double crémaillère ménagée longitudinalement sous chaque extrémité libre (6b, 7b) des bras (6, 7).  7 / seat according to one of claims 2 to 6 characterized in that the anchoring axis (17) of each arm (6, 7) passes through and opens out on either side of the seat post (9 , 10) to form two studs (17A, 17B) in which a double rack anchored longitudinally under each free end (6b, 7b) of the arms (6, 7) is anchored.
PCT/FR1991/000311 1990-04-13 1991-04-12 Hinged seat made of a plastics material, and moulding method for producing same WO1991015978A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004795A FR2660845A1 (en) 1990-04-13 1990-04-13 ARTICULATED PLASTIC SEAT AND MOLDING METHOD FOR OBTAINING SUCH A SEAT.
FR90/04795 1990-04-13

Publications (1)

Publication Number Publication Date
WO1991015978A1 true WO1991015978A1 (en) 1991-10-31

Family

ID=9395765

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1991/000311 WO1991015978A1 (en) 1990-04-13 1991-04-12 Hinged seat made of a plastics material, and moulding method for producing same

Country Status (2)

Country Link
FR (1) FR2660845A1 (en)
WO (1) WO1991015978A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737270A (en) * 1971-09-27 1973-06-05 T Fiddler Clustered molds for injection molding two or more parts in pivotal assembled condition in a frame
GB2074498A (en) * 1980-04-28 1981-11-04 Grandstand Tribunes Ltd A method of moulding articles such as seat portions and backrests for seats and an improved tip up seat
WO1987005787A1 (en) * 1986-04-04 1987-10-08 I.P.A.E. S.P.A. A stackable plastic deck-chair
DE3734232C1 (en) * 1987-10-09 1989-01-26 Goetz Metall Anlagen Folding-backrest chair
DE3908479A1 (en) * 1988-03-16 1989-09-28 Kakokanagata Seisakusho Kk HINGE AND METHOD FOR THE PRODUCTION THEREOF

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737270A (en) * 1971-09-27 1973-06-05 T Fiddler Clustered molds for injection molding two or more parts in pivotal assembled condition in a frame
GB2074498A (en) * 1980-04-28 1981-11-04 Grandstand Tribunes Ltd A method of moulding articles such as seat portions and backrests for seats and an improved tip up seat
WO1987005787A1 (en) * 1986-04-04 1987-10-08 I.P.A.E. S.P.A. A stackable plastic deck-chair
DE3734232C1 (en) * 1987-10-09 1989-01-26 Goetz Metall Anlagen Folding-backrest chair
DE3908479A1 (en) * 1988-03-16 1989-09-28 Kakokanagata Seisakusho Kk HINGE AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
FR2660845A1 (en) 1991-10-18

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