WO2012153408A1 - Dossier de siège - Google Patents

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Publication number
WO2012153408A1
WO2012153408A1 PCT/JP2011/060883 JP2011060883W WO2012153408A1 WO 2012153408 A1 WO2012153408 A1 WO 2012153408A1 JP 2011060883 W JP2011060883 W JP 2011060883W WO 2012153408 A1 WO2012153408 A1 WO 2012153408A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible
flexible portion
back plate
backrest
chair
Prior art date
Application number
PCT/JP2011/060883
Other languages
English (en)
Japanese (ja)
Inventor
奥田　直之
晶一 井澤
Original Assignee
株式会社岡村製作所
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 株式会社岡村製作所 filed Critical 株式会社岡村製作所
Priority to PCT/JP2011/060883 priority Critical patent/WO2012153408A1/fr
Priority to EP11864921.9A priority patent/EP2708158A4/fr
Priority to US14/116,992 priority patent/US8991932B2/en
Priority to CN201180070706.XA priority patent/CN103533864A/zh
Publication of WO2012153408A1 publication Critical patent/WO2012153408A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

Definitions

  • the present invention relates to a backrest device for a chair formed by connecting opposing surfaces of left and right side walls in a backrest by back plates.
  • the back plate is appropriately bent backward to obtain a comfortable seating feeling (see, for example, Patent Documents 1 to 3).
  • JP 2009-1112729 A Japanese Patent No. 4295266 Japanese Patent No. 4238122
  • a flexible back plate is provided on the inner side surrounded by a large back frame (back frame) having a square shape in front view.
  • back frame back frame
  • the horizontal frame facing the left and right of the upper end of the back frame prevents the upper part of the back plate from bending backward.
  • the upper part of the back is not comfortably supported.
  • the upper and lower middle portions of the back frame and the back plate are shaped like a side view so that the vicinity of the waist is comfortably supported by the lumbar support effect.
  • the lumbar support effect at the lower part of the back plate is small because almost the entire back plate surrounded by the back frame has flexibility.
  • the present invention has been made in view of the above problems, and comfortably supports a seated person's back and waist area by clearly dividing the upper and lower parts of the back plate into a flexible part and a non-flexible part. It is an object of the present invention to provide a chair backrest device that can be used.
  • a pair of left and right side scissors having a U-shaped bent portion that is side-viewed at a portion that supports the vicinity of the lumbar portion of the seated person, and a back plate that connects the opposing surfaces.
  • the upper portion of the back plate above the bent portion is a flexible portion that is elastically deformable to the rear and has a rigidity lower than that of the left and right side rods, and a lower back plate that is lower than the flexible portion.
  • the back plate is clearly divided into an upper flexible portion and a lower non-flexible portion with the bent portion of the side collar sandwiched therebetween, and the back of the seated person is supported.
  • the flexible portion above the bent portion of the side rod is connected to the opposing surfaces of the pair of left and right side rods that are stiffer than that, and the upper end portion of the flexible portion is the back frame as in the prior art. Therefore, when the backrest is reclined, the flexible portion is effectively bent backward and the back is comfortably supported.
  • the back plate below the flexible portion is a non-flexible portion having a rigidity higher than that of the flexible portion, and is difficult to bend backward, so that the lumbar support effect is exerted, and the vicinity of the waist of the seated person is Comfortably supported.
  • the central portion in the left-right direction of the non-flexible portion is connected to a backrest support rod that stands up behind the seat.
  • the flexible portion can be bent in a convex arc shape in a rearward direction in plan view so as to fit the back with the long holes arranged in the vertical direction as the center.
  • the flexible portion and the non-flexible portion are connected to the opposing surfaces of the left and right side lamps so that the flexible portion is positioned in front of the non-flexible portion.
  • the lower end of the part and the upper end of the non-flexible part are made continuous by the step part, and a lattice-like rib is projected on the front surface of the non-flexible part so that the upper end is continuous with the step part.
  • the flexible portion is positioned in front of the non-flexible portion, and the lattice-like ribs are projected on the front surface of the non-flexible portion. It becomes relatively larger than the flexible part, the lumbar support effect becomes large, and the vicinity of the waist is comfortably supported. Further, the lower end of the flexible portion and the upper end of the non-flexible portion are continuous by the step portion, and the upper end of the lattice-like rib is continued to the step portion, so that the flexible portion and the non-flexible portion of the back plate There is no fear that the strength of the boundary portion with the portion will decrease.
  • the front plate is mounted on the front surface of the non-flexible portion with the grid-like ribs interposed therebetween.
  • the grid-like ribs are covered with the front plate nicely, and the front plate is reinforced by the grid-like ribs on the rear surface so as to have a function as a non-flexible portion having a large bending rigidity. Therefore, the vicinity of the waist is comfortably supported by the front plate.
  • the upper and lower portions of the back plate are clearly divided into a flexible portion and a non-flexible portion, and the back and the vicinity of the waist of the seated person are separated by these flexible and non-flexible portions. It is possible to provide a chair backrest device that is comfortably supported.
  • FIG. 1 is a front view of a chair provided with an embodiment of the present invention.
  • FIG. 2 is also a side view.
  • FIG. 3 is also an exploded perspective view of the backrest supporting heel and the backrest attached thereto.
  • FIG. 4 is also a front view of the back plate.
  • 5 is an enlarged cross-sectional plan view taken along line VV in FIG.
  • FIG. 6 is an enlarged cross-sectional plan view taken along the line VI-VI.
  • FIG. 7 is an enlarged longitudinal sectional side view of a backrest attachment portion to a backrest support rod.
  • 8 is an enlarged cross-sectional plan view taken along line VIII-VIII in FIG.
  • FIG. 9 is also an enlarged cross-sectional plan view taken along the line IX-IX.
  • FIG. 1 is a front view of a chair provided with an embodiment of the present invention
  • FIG. 2 is a side view of the same
  • FIG. 3 is an exploded perspective view of the same main part.
  • a leg body 3 having five leg rods 2 is provided.
  • a telescopic leg column 4 having a gas spring (not shown) is erected, and the rear part of the support base 5 is fixed to the upper end of the leg column 4.
  • the support base 5 has a substantially hollow box shape with an upper surface opened, and the opening on the upper surface is covered with a removable cover 5a.
  • a pair of left and right armrests 6, 6 are attached to both side surfaces of the support base 5.
  • a biasing means for biasing the backrest 7 in the standing direction that is, forward
  • a biasing means for biasing the seat 8 supported by the support base 5 forward These are not shown in the drawings, but are not directly related to the present invention, and illustration and detailed description thereof are omitted.
  • the backrest 7 is a pair of left and right backrests that are L-shaped in a side view in which the opposing surfaces of the intermediate bent portion are connected by a connecting plate 9 that faces in the left-right direction, and the upper half rises rearwardly from the seat 8. It is attached to support rods 10 and 10 (details will be described later).
  • the front end portions of the left and right back support rods 10, 10 are pivotally attached to the support base 5 with a left and right axis 11, and the front and rear end portions are connected to the rear end portion of the support base 5 and the connecting plate 9.
  • the backrest support rods 10, 10 and the backrest 7 can be rotated in the front-rear direction around the shaft 11 or stopped at a desired rearward tilt angle. Yes.
  • the backrest 7 includes a pair of left and right side scissors 13 and 13 in which a portion corresponding to the height in the vertical direction, that is, the height near the waist of the seated person is bent in a side view, A back plate 14 having a thickness smaller than the front and rear dimensions of the side ridges 13 and connecting the 13 opposing surfaces. The right and left dimensions and the front and rear dimensions of the left and right side rods 13 and 13 are gradually reduced upward.
  • the left and right side bars 13, 13 and the back plate 14 are integrally formed of synthetic resin.
  • a portion of the back plate 14 that supports the back of the seated person, that is, a portion slightly above the bent portion 13a of the side arm 13 is a flexible portion 14a, and a lower half portion that supports the lower portion from the vicinity of the waist of the seated person is not. It is set as the flexible part 14b.
  • the flexible portion 14a By connecting the flexible portion 14a to the middle portion of the opposing surface of the side ridges 13 and the non-flexible portion 14b to the rear edge of the side ridges 13, respectively, the intermediate portion in the vertical direction which is the continuous portion thereof Is formed with a step portion 15 having a horizontal cross-section recessed backward (see FIG. 7), and the front surface of the non-flexible portion 14b is located rearward of the front surface of the flexible portion 14a.
  • a recess 16 is formed in the front surface of the back plate 14 below the portion 15 so as to be recessed backward and open downward.
  • the lower edge of the flexible portion 14 a and the lower surface of the step portion 15 are curved in a downward arc shape to the vicinity of the bent portion 13 a of the side rod 13.
  • a pair of front and rear concave grooves 17 and 18 facing in the up-and-down direction that are recessed rearward and forward are provided on both front and rear surfaces of the left and right side bars 13 and 13 so as to be aligned with each other in the front-rear direction.
  • the horizontal cross-section of each side rod 13 in the portion where 17 and 18 are provided is substantially H-shaped (see FIG. 5).
  • a long hole 19 that is long in the vertical direction is arranged in the vertical direction on the substantially front surface except the lower end of the flexible portion 14 a of the back plate 14.
  • a large number of flexible portions 14a are provided adjacent to each other, and the back of the seat is comfortably supported by facilitating flexion of the flexible portion 14a in the shape of a convex arc facing backward in plan view with the long holes 19 arranged in the vertical direction as the center. It is made to do.
  • On the rear surface of the flexible portion 14a a large number of ribs 20 are provided so as to face in the vertical direction.
  • board thickness of the flexible part 14a is substantially uniform, and only the front-back dimension of the rib 20 is made small gradually as it goes upwards (refer FIG. 7).
  • a synthetic resin front plate 28 which will be described later, is mounted on the front surface of the non-flexible portion 14b.
  • the front plate 28 is mounted on both sides of the rib 21, and thus supports the vicinity of the waist of the seated person. It functions as a non-flexible part.
  • the backrest 7 is positioned on the lower surface of both sides of the step portion 15 of the backplate 14 and the upper end portions of the left and right backrest support rods 10 can be positioned and held below.
  • Cylindrical holding portions 22, 22 that are open to the bottom are integrally projected downward.
  • the rear surfaces of both holding portions 22 and a part of the outer peripheral surface on the outer side are respectively connected to the front surface of the non-flexible portion 14 b and the horizontal piece of the lattice-like rib 21, and the front outer peripheral surfaces of both holding portions 22 And the right and left holding parts 22, 22 are reinforced by connecting the lower front surface of the flexible part 14a with the ribs 23, 23 in the vertical direction.
  • the left and right backs inserted into the recesses 16 between the left and right grid-like ribs 21, 21 on the front surface of the non-flexible portion 14 b of the back plate 14.
  • the left and right holding portions 22, 22 projecting from the lower surface of the stepped portion 15 of the back plate 14 are fitted to the upper end portions of the back support rods 10, 10 from above so that the backrest 7 is supported on the left and right back support rods 10. 10 is temporarily held.
  • the front surfaces of the left and right fixing pieces 24 projecting forward at the center of the lower front surface of the non-flexible portion 14 b of the back plate 14 are attached to the left and right backrest support rods 10, 10.
  • a fixing screw 26 which is brought into contact with the rear surface of the upper end portion of the connecting plate 9 fixed to the opposing surface, and the connecting plate 9 and the fixing piece 24 are inserted into the two left and right through holes 25, 25 provided from the front side; 26 and nuts 27, 27. Accordingly, the non-flexible portion 14b of the back plate 14 is firmly attached to the left and right back support rods 10 and 10.
  • the nut 27 may be omitted by using the through hole 25 of the fixed piece 24 as a female screw hole.
  • the front plate 28 having a large bending rigidity and made of a hard synthetic resin having substantially the same shape as that of the upper portion of the backrest supporting rod 10 and the front surface of the non-flexible portion 14b of the back plate 14 is attached to the front portion of the non-flexible portion 14b. Covered by. As shown in FIG. 8, the front plate 28 has a plurality of engagement holes formed at the intersections of the lattice ribs 21 with four cylindrical protrusions 29 projecting backward on the rear surfaces of the upper, lower, left and right sides. By being press-fitted into any four of 30 (see FIG. 4), they are fastened so as to align with the front surface of the flexible portion 14a. Note that the upper portion of the front plate 28, that is, the portion that supports the vicinity of the lumbar portion of the seated person is curved in a U-shape when viewed from the side (see FIG. 7).
  • the front surface of the front plate 28, the front surface of the flexible portion 14a of the back plate 14, and the rear surface of the flexible portion 14a of the back plate 14 are covered with a cushion material 31 that is folded in half.
  • the concave portion 16 that opens downward is provided below the middle portion in the vertical direction on the front surface of the back plate 14, and the left and right backrest supports inserted into the concave portion 16. Since the cylindrical holding portions 22 and 22 that project downward from the lower surface of the step portion 15 are fitted to the upper end portions of the flanges 10 and 10, the back plate is attached to the backrest support rod 10. 14 can be easily positioned and temporarily held. Therefore, the fixing work of the lower part of the back plate 14, that is, the screwing work of the fixing piece 24 protruding from the non-flexible portion 14b and the connecting plate 9 connecting the left and right back support rods 10 and 10 is performed. It becomes extremely easy.
  • the left and right cylindrical holding portions 22, 22 are integrally connected to the front surface of the step portion 15 and the non-flexible portion 14b of the back plate 14, and the bending strength in the front-rear and left-right directions is increased.
  • the intermediate portion of the back plate 14 can be stably held by the upper end portions of the backrest support rods 10 and 10 simply by fitting both the holding portions 22 and 22 to the upper end portions of the left and right backrest support rods 10 and 10. can do. Therefore, it is not necessary to fix the intermediate portion of the back plate 14 to the upper end portion of the back support rod 10 by fixing means such as screws, and only the lower portion of the back plate 14 is screwed to the connecting plate 9 of the back support rod 10. However, since the mounting strength of the back plate 14 to the back support rod 10 is sufficiently ensured, it is necessary to use a special connecting member or to fix it with screws at two places, as in the past. In addition, the number of parts and cost are reduced.
  • the upper half of the back plate 14 that supports the back of the seated person is the flexible portion 14a
  • the lower half of the lower half that supports the lower portion from the vicinity of the waist is the non-flexible portion 14b including the front plate 28.
  • the upper half and the lower half of 14 are clearly divided into a portion that is easily bent and a portion that is not easily bent, and the recess 16 formed below the intermediate portion of the back plate 14 is supported by the backrest support rod 10.
  • the flexible portion 14a and the non-flexible portion 14b are connected to the opposing surfaces of the pair of left and right side flanges 13 and 13 having a rigid shape in a side view.
  • the upper part becomes easier to bend rearward and can comfortably support the back of the occupant via the cushion material 31, and the non-flexible part 14b having a rigidity higher than that of the flexible part and the front plate 28 on the front thereof are lumbar. Demonstrate the support effect and comfortably support the seat Kill.
  • the concave portions 16 are formed on the front surface of the back plate 14, and the holding portions 22, 22 connected to the step portion 15 recessed rearward on the upper surface thereof are used as the upper end portions of the backrest support rods 10, 10.
  • the back surface of the back plate 14 is recessed forward and a recess opening downward is formed, and a stepped surface formed in the upper surface thereof is recessed forward.
  • the holding portion as described above may be provided continuously, and this holding portion may be fitted to the upper end portion of the backrest support rod 10.
  • the front plate 28 is not necessary, and the lower half of the back plate 14 becomes the non-flexible portion as it is, and the rear plate may be fastened to the rear surface of the concave portion recessed forward.
  • lattice-shaped ribs may be provided on the rear surface of the non-flexible portion in the lower half to reinforce the portion.
  • the present invention can also be applied to a chair in which the cushion material 31 is not attached to the backrest 7.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

Cette invention concerne un dossier de siège, dont l'un des modes de réalisation comporte : une paire de supports latéraux gauche et droit (13) dont une section courbée (13a) a la forme d'un symbole « inférieur » en coupe latérale au niveau d'une zone soutenant une zone située proximité de la zone lombaire de l'occupant du siège ; et une plaque dorsale (14) qui relie les faces opposées l'une à l'autre. La zone de la plaque dorsale (14) située au-dessus de la section courbée (13a) est une section souple (14a) dont la rigidité est inférieure à celle des supports latéraux gauche et droit (13) et peut se déformer élastiquement vers l'arrière. La zone de la plaque dorsale (14) située en dessous de la section souple (14a) est une section non souple (14b) dont la rigidité est supérieure à celle de la section souple (14a).
PCT/JP2011/060883 2009-11-12 2011-05-11 Dossier de siège WO2012153408A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2011/060883 WO2012153408A1 (fr) 2011-05-11 2011-05-11 Dossier de siège
EP11864921.9A EP2708158A4 (fr) 2011-05-11 2011-05-11 Dossier de siège
US14/116,992 US8991932B2 (en) 2009-11-12 2011-05-11 Backrest mechanism for chair
CN201180070706.XA CN103533864A (zh) 2011-05-11 2011-05-11 椅子的靠背装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/060883 WO2012153408A1 (fr) 2011-05-11 2011-05-11 Dossier de siège

Publications (1)

Publication Number Publication Date
WO2012153408A1 true WO2012153408A1 (fr) 2012-11-15

Family

ID=47138907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/060883 WO2012153408A1 (fr) 2009-11-12 2011-05-11 Dossier de siège

Country Status (3)

Country Link
EP (1) EP2708158A4 (fr)
CN (1) CN103533864A (fr)
WO (1) WO2012153408A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3858196B1 (fr) * 2016-02-05 2023-09-20 Formway Furniture Limited Chaise et ses composants

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4238122B2 (ja) 2003-11-28 2009-03-11 株式会社イトーキ 椅子の座板並びに背板
JP2009112729A (ja) 2007-11-09 2009-05-28 Uchida Yoko Co Ltd 椅子の背もたれ構造
JP2009112397A (ja) * 2007-11-02 2009-05-28 Okamura Corp 椅子の背凭れ装置
JP4295266B2 (ja) 2005-11-04 2009-07-15 株式会社岡村製作所 椅子の背凭れ装置
JP2009195742A (ja) * 2009-06-08 2009-09-03 Okamura Corp 椅子の背凭れ装置
JP2011083527A (ja) * 2009-10-19 2011-04-28 Okamura Corp 椅子
JP2011101762A (ja) * 2009-11-12 2011-05-26 Okamura Corp 椅子の背凭れ装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5026127B2 (ja) * 2007-03-26 2012-09-12 株式会社岡村製作所 椅子におけるランバーサポート装置
KR20100095548A (ko) * 2007-11-02 2010-08-31 가부시끼가이샤 오까무라세이사꾸쇼 의자 등받이 및 그의 장착 장치

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4238122B2 (ja) 2003-11-28 2009-03-11 株式会社イトーキ 椅子の座板並びに背板
JP4295266B2 (ja) 2005-11-04 2009-07-15 株式会社岡村製作所 椅子の背凭れ装置
JP2009112397A (ja) * 2007-11-02 2009-05-28 Okamura Corp 椅子の背凭れ装置
JP2009112729A (ja) 2007-11-09 2009-05-28 Uchida Yoko Co Ltd 椅子の背もたれ構造
JP2009195742A (ja) * 2009-06-08 2009-09-03 Okamura Corp 椅子の背凭れ装置
JP2011083527A (ja) * 2009-10-19 2011-04-28 Okamura Corp 椅子
JP2011101762A (ja) * 2009-11-12 2011-05-26 Okamura Corp 椅子の背凭れ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2708158A4

Also Published As

Publication number Publication date
EP2708158A4 (fr) 2014-09-24
CN103533864A (zh) 2014-01-22
EP2708158A1 (fr) 2014-03-19

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