JP2007330337A - Chair - Google Patents

Chair Download PDF

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Publication number
JP2007330337A
JP2007330337A JP2006162631A JP2006162631A JP2007330337A JP 2007330337 A JP2007330337 A JP 2007330337A JP 2006162631 A JP2006162631 A JP 2006162631A JP 2006162631 A JP2006162631 A JP 2006162631A JP 2007330337 A JP2007330337 A JP 2007330337A
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JP
Japan
Prior art keywords
leg
left
front
legs
seat
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
JP2006162631A
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Japanese (ja)
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JP4964506B2 (en
Inventor
Nagasuke Hara
Yoichiro Oda
永祐 原
洋一郎 小田
Original Assignee
Okamura Corp
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.)
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Publication date
Application filed by Okamura Corp, 株式会社岡村製作所 filed Critical Okamura Corp
Priority to JP2006162632A priority Critical patent/JP4926551B2/en
Priority to JP2006162631A priority patent/JP4964506B2/en
Priority to JP2006163383A priority patent/JP4964507B2/en
Publication of JP2007330337A publication Critical patent/JP2007330337A/en
Application granted granted Critical
Publication of JP4964506B2 publication Critical patent/JP4964506B2/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/002Chair or stool bases
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/44Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame

Abstract

An object of the present invention is to make it possible to tilt the backrest greatly backward without increasing the height of the leg or the seat and with a small rotation angle.
A leg 1 includes a pair of left and right side legs 9 in a side view mountain shape having a front leg 9a inclined forward and downward and a rear leg 9b inclined backward and downward. The lower end portion is pivotally attached to an appropriate position of the leg body 1 below the seat body 2 so as to be able to tilt backward between the left and right side legs 9.
[Selection] Figure 3

Description

  The present invention relates to a chair in which a backrest is pivotally attached to a leg that supports a seat so as to be tilted backward.

This type of chair is described in Patent Documents 1 and 2, for example, and is known.
JP 2002-282077 A JP 2004-16516 A

  In each of the chairs described in Patent Documents 1 and 2, the lower end of the backrest that can be tilted backward is pivotally attached to the leg at the same height as the rear end of the seat. Therefore, the radius of rotation from the pivot part to the upper end of the backrest is naturally limited.

  As described above, when the rotation radius from the pivot portion to the upper end of the backrest is limited, the rotation angle when the backrest is tilted backward is increased. It is necessary to increase the height of the seat.

  Further, like the chair described in Patent Document 1, if the lower end of the backrest is simply pivotally attached to the leg at the rear end of the seat body, the seat back when the backrest is tilted backwards When the chair is installed, a large installation space in the front-rear direction is required.

  In the chair described in Patent Document 2, the structure is complicated and the number of parts is large because the chair is lifted by a link mechanism and then tilted backward so that the backrest can be tilted largely backward. Has the problem.

  The present invention has been made in view of the above problems, and the backrest can be greatly tilted backward at a small rotation angle without increasing the height of the leg body and the seat body, and at the time of backward tilting. An object of the present invention is to provide a chair capable of reducing the rearward projecting dimension.

According to the present invention, the above problem is solved as follows.
(1) In a chair formed by pivotally mounting a backrest supporting frame with a backrest attached to the front surface to a leg that supports the seat so as to be able to tilt backward from a position standing up behind the seat. The leg body is provided with a pair of left and right side legs having a mountain shape in side view having a front leg inclined forward and downward and a rear leg inclined rearward and downward, and the lower end of the back support frame is connected to the left and right sides. The leg is pivotally attached to an appropriate position below the seat so that it can tilt backward between the legs.

(2) In the above item (1), a pair of left and right forward arms facing the front is connected to the lower end of the back support frame, and the front ends of both forward arms are formed in a mountain shape of a side leg. It is pivotally attached to the leg at a position that is almost level with the top.

(3) In the above item (1) or (2), the vicinity of the tops of the left and right side legs are connected by a connecting member facing in the left-right direction, and a support base that supports the seat on the upper surface of the central portion of the connecting member. Is provided.

(4) In any one of the above items (1) to (3), the rear legs of the left and right side legs are expanded outward so as to form a square shape in plan view.

(5) In any one of the above items (1) to (4), the front legs of the left and right side legs are also expanded outward so as to form a square shape in plan view.

(6) In any one of the above items (1) to (5), the side leg is shaped like a side view in which the longitudinal dimension of the rear leg is longer than that of the front leg.

According to the first aspect of the present invention, the lower end of the back support frame is pivotally attached to the lower leg of the seat so that it can be tilted backward between the left and right side legs. The radius of rotation to the upper end of the backrest is large, the backrest can be largely tilted backward with a small rotation angle, and the rearward projecting dimension when tilting backward is also small.
In addition, since the leg and the seat can be tilted rearward without increasing the height of the leg or the seat, it is possible to provide a low seat height type chair that can be seated in an easy posture.

  According to the second aspect of the present invention, the rotational radius of the backrest is further increased, and the pivoting position is also increased. Therefore, the backrest can be largely inclined backward with a smaller rotation angle.

  According to the invention described in claim 3, the load of the seat is substantially balanced near the top of the left and right side legs, that is, near the connecting part of the front and rear legs in the central part between the both side legs. This improves the stability of the chair when seated.

  According to the fourth aspect of the invention, the stability when the backrest is tilted backward is improved.

  According to the fifth aspect of the invention, the stability of the entire chair is improved, and the lower limb portion of the seated person is less likely to hit the front leg.

According to the sixth aspect of the invention, the stability when the backrest is tilted backward is further increased.
In addition, since the side legs are shaped like a side view, it is possible to provide a low-sitting-type chair in which the height of the legs and seats is lower.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a front perspective view of the chair of the present invention, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a side view when the backrest is also tilted backward, and FIG. 5 is a rear view. The chair is attached to the front of the leg (1), the seat (2) supported by the leg, the back support frame (3) pivotally attached to the leg (1), and the front. A backrest (6) comprising a mesh-like backrest plate (4) and a cushion body (5), and a right and left right side of a rhombus frame attached to the lower end of the backrest support frame (3) A pair of armrests (7).

  As shown in the perspective view of FIG. 6 and the plan view of FIG. 7, the leg body (2) has a front leg (9 a) having a caster (8) at the front end and a front lower slope (9 a), and the front and rear dimensions are longer than this. A pair of left and right side legs (9), (9), which are formed in a side view, comprising rear legs (9b) having rear casters (8) having casters (8) at the rear end, and both legs (9 ) And a connecting member (10) having a U-shape in a front view attached to an opposing surface near the top.

  The reason why the rear leg (9b) is longer than the front leg (9a) is to ensure the stability of the chair when the backrest (6) is tilted backward.

  The front legs (9a) and rear legs (9b) of the left and right side legs (9) have their apexes so as to expand outwardly into a front-shaped C-shape and a rear-shaped C-shape in plan view, respectively. As the center, it is bent outwards to enhance the stability of the leg (1).

  A short shaft portion (11) facing in the left-right direction is integrally connected to the top of each side leg (9), and a mounting piece (12) is attached to the inner surface of the front end portion of the rear leg (9b). It protrudes downward (see FIG. 3).

  On the inner end face of the left and right short shaft portions (11), the upper ends of the pair of left and right standing pieces (10a) and (10a) facing the upper front of the connecting member (10) Also on the side surfaces, both side surfaces of the side heel (10b) located slightly on the rear leg (9b) side of the standing piece (10a) of the connecting member (10) are screwed by bolts (13) inserted from the outside respectively. It is worn.

  The head of the bolt (13) inserted into the short shaft portion (11) is covered with a circular cap (14) (not shown in FIG. 5) fixed in the concave hole on the side surface of the short shaft portion (11). ing.

  The rear end of the support base (15) for supporting the seat (2) is formed on the upper surface of the upward bulging portion (10c) formed at the center portion in the left-right direction of the horizontal rod (10b) in the connecting member (10). However, the front end portion of the support base (15) is fixed by the bolt (16) such that the front end portion protrudes forward of the reed (10b).

  The height of the upper end of the support base (15) is such that the connecting member (10) has an upward U-shape, the upper end of the upright piece (10a) is at the top of the side leg (9), and the horizontal arm (10b) By sticking to the attachment pieces (12) of the rear legs (9b), the upper legs of the side legs (9) protrude slightly upward.

  As shown in FIGS. 3 and 5, the backrest support frame (3) stands behind the seat (2), and has a forward arm (17 a) inclined obliquely rearward and upward at the lower end. It consists of a pair of left and right side frames (17) and (17) and a rearward convex arc-shaped upper frame (18) that joins the upper ends of both side frames (17). The front-rear side view has a substantially vertically downward U-shape.

  The left and right side frames (17) have a left and right dimension that is smaller than the distance between the rear legs (9b) and (9b) of the pair of left and right side legs (9). When tilted backward, the forward arm portion (17a) can tilt between the left and right rear legs (9b) without interfering with it.

  As shown in FIG. 6, inwardly bent portions (17b) that are substantially coaxial with the short shaft portion (11) at the top of the side leg (9) are connected to the front ends of the left and right forward arms (17a). The inwardly bent portion (17b) is rotated around a torsion shaft (not shown) facing in the left-right direction in a reclining mechanism such as a known rubber torsion unit provided in the support base (15). It is connected in a state where it is urged in a counterclockwise direction when possible and always in a side view. As a result, the backrest support frame (3) and the backrest (6) attached to the backrest support frame (3) are inclined backward about the support base (15) when the seated person pushes the backrest (6) backward. (See FIG. 4).

  As shown in FIG. 3 and FIG. 6, on the outer end surface of the shaft-like support portion (19) that is connected to the front end of the support base (15) and whose left and right end portions protrude outward from the support base (15). In addition, the inner surface of the inwardly bent portion at the lower end of the pair of left and right seat support links (20) (20) facing in the vertical direction is pivotally attached to the front and rear by the pivot (21) facing in the left and right direction. ing.

  Further, seat support pieces (22) and (22) project upward from the upper surfaces of the front end portions of the left and right forward arms (17a) of the back support frame (3). Reference numeral (23) denotes a rectangular parallelepiped armrest mounting portion that protrudes from the upper surface of the forward arm portion (17a) so as to be continuous with the seat support piece (22).

  At the upper end of the left and right seat support links (20), the left and right sides of the front end of the seat frame (24) attached to the lower surface of the seat (2) are pivoted by the pivot (25) facing in the left-right direction. Further, the left and right sides of the rear side of the seat frame (24) are pivoted to the upper ends of the left and right seat support pieces (22) so as to be pivotable by a pivot (26) facing in the left-right direction. (See FIG. 3).

  As a result, the front part of the seat body (2) is connected to the left and right side parts of the front end of the support base (15) substantially integrated with the leg body (1) via a pair of left and right seat support links (20). The middle part near the rear part of the seat body (2) is supported by the left and right forward arms (17a) of the back support frame (3) via a pair of left and right seat support pieces (22). Is supported by

  Therefore, as shown in FIG. 4, when the backrest support frame (3) is tilted backward together with the backrest (6), the seat body (2) is also tilted rearward and downward in conjunction therewith. After the seat (2) is attached, the rear part of the front leg (9a) and the front part of the rear leg (9b) of the both side legs (9) are positioned inward from the both side edges of the seat body (2). In addition, both side legs (9) of the leg body (1) are not protruded greatly outward (see FIG. 2).

  As described above, in the chair of the above embodiment, the front lower end of the backrest support frame (3) is the upper center between the legs (9) and (9) of the leg (1), that is, the seat (2 ) Is pivotally mounted on a support base (15) that is substantially integral with the leg (1), so that the backrest support frame (3) and the back support frame (3) and back The radius of rotation up to the upper end of the bow (6) becomes large, the backrest (6) can be tilted backwards with a small rotation angle, and the rearward projecting dimension when tilting backward is also reduced.

Further, since the legs (1) and the seat (2) can be tilted rearward without increasing their height, a low seat height type chair that can be seated in an easy posture can be provided.
Moreover, in the above-described embodiment, the front portions of the backrest support frame (3) and the seat body (2) are placed on the recumbent portion (10a) of the connecting member (10) having a U-shape in the front view in the leg body (1). Since it is pivotally attached to the support base (15) which is provided at the same height as the top of the side leg (9), the seating height is lower and it is possible to sit in a more comfortable posture.

  The front and rear dimensions (17a) of the back support frame (3) are relatively long and not only have a large radius of rotation, but also slant upward and diagonally below the seat (2), and The front lower end is pivotally attached to a position that is almost level with the top of the side leg (9) that forms a U-shape, so that the pivotable angle of the forward arm (17a) can be increased. There is no danger that the rear end will interfere with the floor.

The front legs (9a) and rear legs (9b) of both legs (9) of the leg (1) are widened outward to form a plan view and the front and rear dimensions of the rear legs (9b) are the front legs. Since it is longer than (9a), the chair has high stability and is excellent in stability when the backrest (6) is tilted backward.
Further, since the left and right front legs (9a) are expanded outward, the possibility that the lower limbs of the seated person will hit the front legs (9a) is small.

  In the above embodiment, the forward arm (17a) of the back support frame (3) is pivotally attached to the support base (15), but the tops of the left and right side legs (9), that is, It may be pivotally attached to the inner surface of the short shaft portion (11) via an appropriate reclining mechanism.

  In the above embodiment, the seat body (2) also tilts backward in conjunction with the tilting of the backrest support frame (3). However, the seat body (2) simply includes the support base (15). It may be fixedly provided at an appropriate position in the upper part of the leg (1).

It is a front perspective view showing one embodiment of a chair of the present invention. It is also a front view. It is a side view similarly. Similarly, it is a side view when the backrest is tilted backward. Similarly it is a rear view. It is a perspective view of a leg. It is also a plan view.

Explanation of symbols

(1) Leg
(2) Seat
(3) Back support frame
(4) Backrest board
(5) Cushion body
(6) Backrest
(7) Armrest
(8) Casters
(9) Side legs
(9a) Front leg
(9b) Rear legs
(10) Connecting member
(10a) Standing piece
(10b) Yokohama
(10c) Upward bulge
(11) Short shaft
(12) Mounting piece
(13) Bolt
(14) Cap
(15) Support base
(16) Bolt
(17) Side frame
(17a) Forward arm
(17b) Inward bending
(18) Upper frame
(19) Shaft support
(20) Seat support link
(21) Axis
(22) Seat support piece
(23) Armrest mounting
(24) Seat frame
(25) Axis
(26) Axis

Claims (6)

  1. In a chair formed by pivoting a backrest supporting frame with a backrest attached to the front surface to a leg that supports the seat so as to be able to tilt backward from a position standing up behind the seat.
    The leg is provided with a pair of left and right side legs having a mountain shape in a side view having a front leg inclined forward and downward and a rear leg inclined downward and downward. A chair characterized by being pivotally attached to an appropriate position of the leg below the seat so that it can tilt backward between the side legs.
  2.   A pair of left and right forward arms facing the front is connected to the lower end of the backrest support frame, and the front ends of both forward arms are positioned approximately at the same height as the top of the side legs. The chair according to claim 1, wherein the chair is pivotally attached to an appropriate position of the leg.
  3.   The chair according to claim 1 or 2, wherein the top portions of the left and right side legs are connected to each other by a connecting member facing in the left-right direction, and a support base for supporting the seat is provided on the upper surface of the central portion of the connecting member.
  4.   The chair according to any one of claims 1 to 3, wherein the rear legs of the left and right side legs are widened outward so as to form a backward-shaped C shape in a plan view.
  5.   The chair according to any one of claims 1 to 4, wherein the front legs of the left and right side legs are expanded outward so as to form a C-shape in a plan view.
  6. The chair according to any one of claims 1 to 5, wherein the side legs are formed in a shape of a side view in which the front and rear dimensions of the rear legs are longer than the front legs.
JP2006162631A 2006-06-12 2006-06-12 Chair Active JP4964506B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006162632A JP4926551B2 (en) 2006-06-12 2006-06-12 Chair
JP2006162631A JP4964506B2 (en) 2006-06-12 2006-06-12 Chair
JP2006163383A JP4964507B2 (en) 2006-06-13 2006-06-13 Chair

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2006162631A JP4964506B2 (en) 2006-06-12 2006-06-12 Chair
CN 200780030054 CN101500455B (en) 2006-06-12 2007-06-11 Chair
PCT/JP2007/061739 WO2007145170A1 (en) 2006-06-12 2007-06-11 Chair
CA 2655276 CA2655276C (en) 2006-06-12 2007-06-11 Chair having support base
EP07745028.6A EP2033541A4 (en) 2006-06-12 2007-06-11 Chair
US12/304,523 US20090195043A1 (en) 2006-06-12 2007-06-11 Chair

Publications (2)

Publication Number Publication Date
JP2007330337A true JP2007330337A (en) 2007-12-27
JP4964506B2 JP4964506B2 (en) 2012-07-04

Family

ID=38831684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006162631A Active JP4964506B2 (en) 2006-06-12 2006-06-12 Chair

Country Status (6)

Country Link
US (1) US20090195043A1 (en)
EP (1) EP2033541A4 (en)
JP (1) JP4964506B2 (en)
CN (1) CN101500455B (en)
CA (1) CA2655276C (en)
WO (1) WO2007145170A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6494088B2 (en) * 2015-01-16 2019-04-03 株式会社オカムラ Reaction force mechanism and chair using the same

Citations (5)

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JPS59114051U (en) * 1983-01-24 1984-08-01
JPH10276853A (en) * 1997-04-02 1998-10-20 Chuo Katan Kogyo Kk Stacking chair
US5868468A (en) * 1998-04-24 1999-02-09 Wang; Chin-Chen Chair with adjustable inclination
US6012774A (en) * 1996-11-18 2000-01-11 Hwe, Inc. Reclining chair with guide rail system
JP2004057572A (en) * 2002-07-30 2004-02-26 Itoki Crebio Corp Chair that can be connected in a row

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US4303219A (en) * 1979-12-14 1981-12-01 Carrick Virgil P Swivel-rocker base
IT1161498B (en) * 1983-07-12 1987-03-18 Castelli Spa Chair
DE19754829A1 (en) * 1997-12-10 1999-07-08 Wilkhahn Wilkening & Hahne Seat with backrest
US6030037A (en) * 1998-05-15 2000-02-29 Steelcase Inc. Horizontally nestable chair
US6412869B1 (en) * 1999-05-27 2002-07-02 Steelcase Development Corporation Nestable synchrotilt chair
JP2002282077A (en) 2001-03-23 2002-10-02 Okamura Corp Chair
US6609755B2 (en) * 2001-06-15 2003-08-26 Hon Technology Inc. Ergonomic chair
US6595584B1 (en) * 2002-01-16 2003-07-22 John W. Caldwell Seating for individuals and for groups of individuals with various degrees of accommodation and distraction
JP4154934B2 (en) 2002-06-17 2008-09-24 松下電工株式会社 Massage chair
JP2004033449A (en) 2002-07-03 2004-02-05 Kokuyo Co Ltd Lever attaching structure for chair
USD512846S1 (en) * 2003-05-19 2005-12-20 Hni Technologies Inc. Mobile guest chair with arms
JP4589621B2 (en) 2003-12-19 2010-12-01 株式会社岡村製作所 Chair
USD543040S1 (en) * 2005-11-10 2007-05-22 Okamura Corporation Chair
USD543042S1 (en) * 2005-11-10 2007-05-22 Okamura Corporation Chair
USD542549S1 (en) * 2005-11-10 2007-05-15 Okamura Corporation Chair

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59114051U (en) * 1983-01-24 1984-08-01
US6012774A (en) * 1996-11-18 2000-01-11 Hwe, Inc. Reclining chair with guide rail system
JPH10276853A (en) * 1997-04-02 1998-10-20 Chuo Katan Kogyo Kk Stacking chair
US5868468A (en) * 1998-04-24 1999-02-09 Wang; Chin-Chen Chair with adjustable inclination
JP2004057572A (en) * 2002-07-30 2004-02-26 Itoki Crebio Corp Chair that can be connected in a row

Also Published As

Publication number Publication date
CA2655276C (en) 2013-01-22
CN101500455A (en) 2009-08-05
EP2033541A4 (en) 2014-01-22
US20090195043A1 (en) 2009-08-06
CA2655276A1 (en) 2007-12-21
JP4964506B2 (en) 2012-07-04
EP2033541A1 (en) 2009-03-11
WO2007145170A1 (en) 2007-12-21
CN101500455B (en) 2013-05-08

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