WO2010044331A1 - Siège - Google Patents

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Publication number
WO2010044331A1
WO2010044331A1 PCT/JP2009/066329 JP2009066329W WO2010044331A1 WO 2010044331 A1 WO2010044331 A1 WO 2010044331A1 JP 2009066329 W JP2009066329 W JP 2009066329W WO 2010044331 A1 WO2010044331 A1 WO 2010044331A1
Authority
WO
WIPO (PCT)
Prior art keywords
backrest
facing
bent
chair
cover
Prior art date
Application number
PCT/JP2009/066329
Other languages
English (en)
Japanese (ja)
Inventor
益永　浩
藤田　寿人
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
Priority claimed from JP2008267410A external-priority patent/JP5378747B2/ja
Priority claimed from JP2009042050A external-priority patent/JP5543117B2/ja
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 EP09820509A priority Critical patent/EP2347679B1/fr
Priority to CA2752446A priority patent/CA2752446A1/fr
Priority to US13/124,423 priority patent/US20110198907A1/en
Priority to CN200980140462.0A priority patent/CN102176847B/zh
Publication of WO2010044331A1 publication Critical patent/WO2010044331A1/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
    • 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
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • A47C7/48—Support for the head or the back for the back of freely-rotatable type

Definitions

  • the present invention relates to a chair in which a backrest supporting ridge is substantially L-shaped in a side view.
  • a backrest supporting heel has a substantially L-shape in a side view in which an upright portion facing upward and a forward facing portion facing forward are connected to each other via a bent portion, etc.
  • the back and outer surfaces of the dorsal fin should be covered with a soft material cover. Some are covered (see, for example, Patent Document 1).
  • the present invention may cause the backrest support heel to come into contact with another object when the chair turns or the like, or the backrest support heel itself may be damaged. It is an object of the present invention to provide a chair that can be reliably prevented, has a small number of parts, has a simple structure, and can be easily assembled.
  • Another object of the present invention is to provide a chair in which a backrest frame and a backrest supporting heel constituting the backrest can be firmly connected with a simple structure.
  • a chair With legs; A base supported by legs; A seat supported by a support base; A side surface having an upright portion facing upward, a forward facing portion facing forward, and a bent portion connecting the upright portion and the forward facing portion, the front portion of the forward facing portion being attached to the support base
  • a back-supporting heel that is almost L-shaped
  • a backrest supported by an upright portion of the backrest support ridge
  • a protective cover for covering at least a portion from the rear surface to the lower surface of the bent portion of the back support heel; Shall be provided.
  • the protective cover is made of a cushioning material.
  • Such a configuration can enhance the buffering action when the backrest support heel comes into contact with another object when the chair turns.
  • the protective cover is made of a soft synthetic resin material or rubber.
  • Such a configuration can enhance the buffering action when the backrest support heel comes into contact with another object when the chair turns.
  • the upright portion is constituted by a pair of left and right upright ridges extending upwardly in a bifurcated shape from the bent portion
  • the forward portion is constituted by a pair of left and right forward ridges extending forward from the bent portion.
  • the protective cover includes a bent cover, a standing cover, and a forward cover.
  • the bent cover portion covers a rear surface of the bent portion
  • the standing cover portion is connected to the bent cover portion and covers the rear surface of each of the standing ridges
  • the forward cover portion is formed on the bent cover portion. It is provided in a row and covers the lower surface of each forward-facing ridge.
  • the protective cover is provided with a pair of standing cover portions covering the rear surface of each standing rod and a pair of front cover portions covering the lower surface of each forward rod. Positioning of the protective cover becomes easy.
  • the backrest support ridge has an X-shape in a rear view
  • the bent cover covers the X-shaped central intersection
  • the bent covering portion has a lateral width larger than the lateral width of the standing ridge and / or the forward-facing ridge, and bulges substantially spherically toward the rear.
  • the backrest can be reliably supported in a balanced manner on the left and right sides, and corners are eliminated from the rear surface of the backrest support rod to avoid stress concentration during contact with other objects.
  • it can have a beautiful appearance.
  • each upright covering portion of the protective cover can be securely attached to the backrest support rod so as to be difficult to peel off, and the recess for mounting the backrest is closed to enhance the appearance. Can do well.
  • a gap is formed in a part of the facing portion between the rear surface of the backrest support ridge and the front surface of the protective cover, At least a portion corresponding to the gap in the protective cover is formed of an elastic material.
  • the backrest includes a backrest frame
  • the backrest frame includes a space portion disposed in the center, and a belt-like frame member on which a tension member that closes the space portion is stretched
  • the chair further includes a pair of left and right projecting portions that project inward so as to face each other in the left-right direction at a substantially intermediate position in the vertical direction on the inner edge in the left-right direction of the backrest frame.
  • the backrest frame constituting the backrest can be easily molded.
  • the load applied to the backrest frame during reclining acts in the bending direction of the backrest frame as the backrest leans backward, the bending strength of the backrest frame itself is improved by forming an overhanging portion. be able to.
  • the area required for the connection between the backrest frame and the backrest support collar can be sufficiently secured with the wide area of the overhanging section by forming the overhanging section, the backrest frame and the backrest support collar are secured. Can be coupled to each other with a strong and simple structure.
  • Such a configuration can increase the connection strength between the backrest frame and the backrest support frame.
  • the upper part of the backrest support rod is pivotally attached to the overhanging portion so as to be pivotable in all directions within a desired limit range with a pivot that faces in the left-right direction.
  • the backrest can follow the movement of the seated person's back and smoothly rotate with respect to the backrest support ridge.
  • Such a configuration can effectively prevent the connecting portion between the backrest frame and the upper portion of the backrest support heel from being worn or damaged with the long-term use of the chair.
  • the present invention it is possible to reliably prevent the backrest support heel from coming into contact with another object when the chair is turned and the like, or damaging the backrest support heel itself. It is possible to provide a chair that has a small number of points, has a simple structure, and can be easily assembled.
  • the back frame constituting the back and the back support frame can be firmly connected with a simple structure.
  • FIG. 4 is an enlarged longitudinal sectional end view taken along line IV-IV in FIG. 3.
  • FIG. 5 is an enlarged cross-sectional plan view taken along line VV in FIG. 2. It is a side view when a backrest supporting heel is tilted backward. It is a perspective view of the chair which is the 2nd Embodiment of this invention. Similarly, it is a rear view. Similarly, it is a side view. It is an expansion perspective view of the frame in the state where the tension member is not stretched.
  • FIG. 11 is an enlarged vertical cross-sectional view of a stretched state of a tension member taken along line XIII-XIII in FIG. 10.
  • FIG. 11 is an enlarged cross-sectional view of a tension member in a tensioned state taken along line XIV-XIV in FIG. 10.
  • FIG. 11 is an enlarged vertical cross-sectional view of a tensioning state of the tension member taken along line XV-XV in FIG. 10.
  • FIG. 11 is an enlarged vertical cross-sectional view of a tensioned material stretched along the line XVI-XVI in FIG. 10.
  • FIG. 10 is an enlarged cross-sectional view of a main part showing a connection state between the frame body and the back support frame taken along line XVII-XVII in FIG. 9. Similarly, it is a disassembled perspective view which shows the connection state of a frame and a backrest support frame.
  • 1 to 6 show a chair according to a first embodiment of the present invention.
  • the chair includes a leg 3 having five radial rods 2 each having a caster 1 provided at the tip.
  • 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 (not shown).
  • the support base 5 is provided with an urging means for urging the backrest 6 in a standing direction, an urging means for urging the seat 7 forward (both not shown), and the like. Since they are not directly related to the present invention, illustration and detailed description thereof are omitted.
  • a hexagonal column-shaped pivot 8 that faces in the left-right direction is pivotally supported at the rear portion of the support base 5 so as to be rotatable about its central axis.
  • the front end portions of the backrest support rod 9 that supports the backrest 6 are fixed so as to rotate integrally with the pivot 8. Yes.
  • the pivot 8 is provided in the support base 5 by an urging means (not shown) made of a torsion coil spring or the like, for example, in a direction in which the backrest 6 and the backrest support rod 9 stand, that is, counterclockwise in FIG. Is being energized.
  • the backrest support 9 has a substantially L-shaped side view in which an upright portion 9a facing upward and a forward facing portion 9b facing forward are connected to each other via a bent portion 9c.
  • the raised portion 9a is bent It consists of a pair of left and right standing ridges 9d, 9d extending in a bifurcated manner from the portion 9c, and the forward facing portion 9b is a pair of left and right extending in a bifurcated manner from the bent portion 9c.
  • Each of the ends of the pivot 8 is fixedly fitted in hexagonal holes 9f, 9f facing left and right provided at the front ends of the pair of left and right forward saddles 9e, 9e. .
  • the left and right standing rods 9d, 9d of the backrest supporting rod 9 are extended in an arc shape obliquely upward and outward from the bent portion 9c, and the left and right forward rods 9e, 9e is extended obliquely outwardly forward and downward, so that the backrest supporting rod 9 has an X-shape when viewed from the rear, and the lateral width of the bent portion 9c, which is the intersection at the center thereof, It is larger than the width of 9e and swells in a substantially spherical shape toward the rear.
  • a continuous shallow recess 10 is formed on the rear surface of the bent support 9c and the upright rods 9d and 9d in the backrest support rod 9 and the rear surface of the forward facing rods 9e and 9e to the rear portion of the lower surface.
  • a protective cover 11 that is provided and covers the back surface of the backrest support rod 9 is detachably fitted to the recess 10 and is adhered to the backrest support rod 9 with an adhesive or a hook-and-loop fastener, or as required. Screwed.
  • the thickness of the protective cover 11 is preferably substantially equal to the depth of the recess 10 so that the surface of the protective cover 11 and the surface of the backrest support rod 9 are aligned so that no step is generated.
  • the protective cover 11 is made of a soft synthetic resin material, rubber, or other cushioning material.
  • the protective cover 11 is connected to the bent cover portion 11a covering the rear surface of the bent portion 9c of the backrest support rod 9, and the bent cover portion 11a.
  • a concave portion 12 for attaching the backrest 6 is provided on the rear surface of the upper end portion of each standing rod 9 d in the backrest supporting rod 9, and the front surface of the upper end portion of each standing covering portion 11 b in the protective cover 11 is provided in the concave portion 12.
  • a gap (not shown) is formed in a part of the facing portion between the back surface of the back support rod 9 and the front surface of the protective cover 11, and at least a portion corresponding to the gap in the protective cover 11 is made of an elastic material.
  • the backrest 6 is a plate material made of an elastically deformable soft synthetic resin material having an arc shape whose center is recessed rearward in plan view, or a cushion material (not shown) sandwiched between the front surface material and a skin material (Not shown) and the like, and the rear surfaces of both side portions in the middle portion in the up-and-down direction are around the axis line facing the left and right upright portions 9d and 9d of the backrest supporting rod 9 and substantially in the left-right direction. And can be rotated at a required angle in a direction away from the axis.
  • the front end portion of the convex shaft 13 protruding from the front surface of the upper end portion of each upright saddle 9 d in the backrest support rod 9 is used as the backrest 6 opposite to it. It is fixed to the rear surface of the backrest 6 so as to form the receiving hole 14 in the shaft hole 15 that is fitted in the receiving hole 14 provided on the rear surface of the side portion and that faces the substantially right and left direction provided in the tip portion of the convex shaft 13.
  • a retaining pin 17 having both ends fixed to each other is fixedly fitted to a cylindrical portion 16a that opens rearward in the receiving plate 16 and faces substantially in the left-right direction.
  • the tip 13a of the convex shaft 13 is a sphere, and the shaft hole 15 passes through the center of the sphere.
  • the shaft hole 15 has an inner diameter of the central portion 15a substantially equal to the outer diameter of the retaining pin 17.
  • tapered hole portions 15b and 15b that gradually increase in diameter toward the outside are formed on both sides from the central portion 15a.
  • the retaining pin 17 is a bolt, which passes through the cylindrical portion 16 a in the receiving plate 16 and the shaft hole 15 in the distal end portion 13 a of the convex shaft 13, and has a nut at the distal end portion.
  • the retaining pin 17 may be a mere pin that is not a bolt, and the orientation of the retaining pin 17 may be parallel to the orientation of the rear surface of the backrest that is slightly inclined with respect to the lateral direction as well as the lateral direction.
  • the outer periphery of the connecting portion between the convex shaft 13 and the cylindrical portion 16a is covered with an elastically deformable cover 18.
  • An enlarged diameter flange portion 13b is formed at the intermediate portion of the convex shaft 13, and the enlarged diameter flange portion 13b is in contact with the front surface of the upper end portion of the standing rod 9d so that the proximal end portion 13c of the convex shaft 13 is formed.
  • the convex shaft 13 is fitted by the fixing screw 20 fitted to the concave portion 12 provided on the rear surface of the upper end portion of the standing rod 9d.
  • the rear end surface of the receiving hole 14 is preferably a spherical surface that is complementary to the spherical surface of the tip end portion 13 a of the convex shaft 13.
  • the convex shaft 13 is provided on the rear side surface of the backrest 6 so as to protrude rearward, and a receiving hole 14 is formed on the front surface of the upper end portion of each upright saddle 9d in the backrest support rod 9 facing the convex shaft 13. Also good.
  • the backrest 6 faces in the left-right direction with a simple structure in which the retaining pin 17 is loosely fitted in the shaft hole 15 provided at the tip of the convex shaft 13. Since it can be supported not only around the axis but also in a direction deviating from the above-mentioned axis so that the required angle can be rotated, without using an expensive means such as a ball joint, the backrest 6 can be produced without any unreasonableness. It can be supported comfortably.
  • the portion of the support base 5 behind the pivot 8 and the lower portion of the backrest 6 above it are connected by a connecting rod 21, and when the backrest supporting rod 9 is tilted backward, the lower portion of the backrest 6 is The backrest support rod 9 is pushed backward by a connecting rod 21 that is rotated rearward and downward.
  • the front end portion of the connecting rod 21 is connected to the support base 5 with the shaft 22 facing in the left-right direction, and the rear end portion of the connecting rod 21 is the back of the mounting bracket 23 fixed to the rear surface of the lower end portion of the backrest 6.
  • a shaft 24 that faces in the left-right direction is connected to a lower end portion that projects downward from the flange 6.
  • the connecting rod 21 is a rigid body having a circular arc shape when viewed from the side with the center of curvature located above (or below) the connecting rod 21, and is disposed between the pair of left and right forward facing rods 9e, 9e in the backrest supporting rod 9. In this way, it is sandwiched between both forward-facing rods 9e, 9e and is not easily exposed to the outside.
  • the rear and front portions of the seat support 25 for supporting the seat 7 so as to be adjustable in the front-rear position are rear support means 26 for guiding the backrest support rod 9 to move rearward and downward in conjunction with the rearward tilt of the backrest support rod 9. It is supported by the support base 5 with the front support means 27.
  • the rear support means 26 includes a link 29 having a lower end pivotally attached to a portion of the support base 5 behind the pivot shaft 8 of the backrest support rod 9 and ahead of the shaft 22 of the connecting rod 21 with a shaft 28 in the left-right direction.
  • the upper end portion is pivotally attached to the rear portion of the seat support body 25 with a shaft 30 in the left-right direction, and the shaft 30 at the upper end portion of the link 29 is connected to the lower end portion of the link 29 in each forward-facing rod 9e. It is assumed that it is slidably fitted in a long hole 31 provided in the rear part of the shaft 28 and directed substantially in the front-rear direction.
  • the long hole 31 is provided in an upward projecting piece 9g provided in a part slightly rearward of the hexagonal hole 9f in each forward flange 9e of the back support rod 9.
  • the front support means 27 is configured such that a left and right shaft 32 provided at the front portion of the seat support 25 is slidably fitted into a long hole 33 provided on the support base 5 and directed downward.
  • the shaft 32 is constantly urged forward by an urging means (not shown) provided in the support base 5.
  • the front support means 27 instead of the above configuration, connects the upper end portion of the upward support link provided at the front portion of the support base to the front portion of the seat, as described in Patent Document 1.
  • the support link may be tilted backward (not shown).
  • the backrest support collar 9 is tilted backward against the urging force of the urging means provided in the support base 5. It is tilted backward about 22.
  • the rearward tilting speed of the connecting rod 21 is larger than the rearward tilting speed of the backrest supporting rod 9, and the shaft 22 of the connecting supporter 21 is located behind the pivot 8 of the backrest supporting rod 9.
  • the lower end portion of the backrest 6 is pushed backward by the shaft 24 at the rear end portion of the connecting rod 21, and the backrest 6 is directed to the backrest supporting rod 9 in the left-right direction (retaining pin). 17), the backrest supporting rod 9 is rotated in the direction opposite to the direction of tilting (backward tilting direction) (standing direction).
  • the backrest 6 when reclining, even if the backrest support rod 9 is tilted backward, the backrest 6 is restrained from tilting backward and tries to maintain a standing position.
  • the user can easily point his / her eyes and arms forward or forward / downward while taking care of the keyboard, so that the keyboard can be driven in an easy posture.
  • a keyboard having a comfortable posture as described above can be obtained simply by adding a simple structure in which the support base 5 and the lower part of the backrest 6 are connected to the basic structure of the conventional chair by the connecting rod 21.
  • the backrest 6 itself can be bent in the front-rear direction as viewed from the side, and there is no need to support the backrest 6 with a complicated support structure.
  • the structure of the whole chair can be simplified.
  • the backrest support rod 9 As the backrest support rod 9 is tilted backward, the long hole 31 provided in the upward projecting piece 9g moves the shaft 30 rearward and downward, thereby tilting the link 29 backward.
  • the backward tilting angular velocity of the link 29 is larger than the backward tilting angular velocity of the backrest support rod 9, and the shaft 28 of the link 29 is located behind the pivot 8 of the backrest support rod 9.
  • the rearward movement amount of 30 is larger than the rearward movement amount of the long hole 31 in the back support rod 9, and the shaft 30 is slid rearward in the long hole 31, and the movement of the shaft 30 at that time
  • the rear portion of the seat support 25 is greatly moved rearward and downward.
  • the front portion of the seat support body 25 resists the biasing force of the biasing means provided in the support base 5,
  • the front shaft 32 slides rearward and downward along the long hole 33, the front shaft 32 is smoothly moved rearward and downward.
  • the backrest 6 is pivoted with respect to the backrest support rod 9 so that the lower end portion thereof is pushed rearward by the connecting rod 21 and keeps standing.
  • the seat 6 can move greatly rearward and downward so as to follow the movement of the lower part of the backrest 6, and the eyes and arms can be moved forward or forward and downward while tilting the back to the seated person. It is possible to make it possible to take an easy work posture in which the keyboard can be driven in an easy posture.
  • the backrest 6 is a plate made of a soft synthetic resin material that can be elastically deformed, or the front surface of the backrest 6 sandwiched by a skin material with a cushioning material interposed therebetween.
  • the backrest 36 has a mesh tension structure.
  • the backrest 36 is a backrest frame which is a mesh-like tension member 37 and the tension member 37 is stretched on the front surface and can close the space 38 opened in the center.
  • a certain frame 39 is used.
  • the frame 39 is formed of a synthetic resin-made strip plate-like frame member that is continuous in the circumferential direction, and includes an upper horizontal frame portion 40A and a pair of left and right side vertical frame portions 40B and 40B having a desired rearward tilt state.
  • a main frame 40 having a substantially square shape in front view continuous in the circumferential direction is provided by the lower horizontal frame portion 40C.
  • the upper horizontal frame portion 40A that forms a part of the periphery of the main frame 40 has an arcuate curved surface whose front surface is inclined upward and is thick from the inner edge toward the outer edge.
  • an engagement groove portion 41 is provided along the left-right direction at the rear end portion of the outer peripheral edge to which the edge member 37a provided on the peripheral portion of the tension member 37 is engaged.
  • the side vertical frame portion 40 ⁇ / b> B has a cross-sectional shape extending from the inner edge of the thick portion where the outer edge side is thick toward the space portion 38 so as to become a thin portion.
  • an engagement groove portion 42 that engages with the edge member 37 a provided on the peripheral edge portion of the tension member 37 is provided along the vertical direction so as to communicate with the engagement groove portion 41. It has been.
  • the lower horizontal frame portion 40C is divided into two in the thickness direction in the front-rear direction, leaving a part of the left and right ends, and the rear surface side is a base 43.
  • a part of the center part in the left-right direction is cut out at a desired interval, and the opposed ends 44a, 44a of the cut-out part 44 are assembled with the rear face facing the front face of the base part 43. It is connected by a connecting frame 45.
  • a fitting portion 46 that fits into the cut-out portion 44 of the base portion 43 protrudes rearward from a central portion in the left-right direction of the connection frame 45, and the fitting portion 46 is provided in the main frame 40.
  • the width dimension is substantially the same as the distance dimension between the opposed surfaces of the opposed end portions 44a, 44a of the cut portion 44.
  • the mounting bracket 23 to which the rear end of the connecting rod 21 pivotally supported by the lower portion of the frame 39 forming the backrest 36 is attached with the shaft 24 straddles between the opposed end portions 44a and 44a of the cutout portion 44.
  • the base 43 is fixed to the rear surface. Thereby, when reclining the backrest 36, the base 43 can be elastically deformed against a load caused by the connecting rod 21 applied to the center of the rear surface of the base 43 via the mounting bracket 23.
  • connection frame 45 is formed with a pair of left and right fastening parts 47, 47 extending from both front side ends of the fitting part 46 toward the front side of the opposed end parts 44 a, 44 a of the cutout part 44 of the base part 43.
  • the rear surfaces of these fastening portions 47 are in contact with the front surfaces of the opposed end portions 44a and 44a of the cut portion 44, and are placed on the front surface of the base portion 43 so as to straddle between the opposed end portions 44a and 44a of the cut portion 44. Each is to be fastened.
  • the lower horizontal frame portion 40C is formed into a thick cross-sectional shape having a hollow structure as shown in FIGS. 15 and 16 by assembling the base portion 43 and the connecting frame 45.
  • a plurality of ribs 48 and 49 along the longitudinal direction in the up-down direction and the left-right direction are respectively provided on the portion so as to project in the front-rear direction.
  • the connecting frame 45 is assembled to the base portion 43, the end portions of the ribs 48 facing the facing surfaces of the facing end portions 44 a and 44 a in the cutout portion 44 of the base portion 43 come into contact with the left and right end surfaces of the fitting portion 46. It is the contact part 48a.
  • a bolt insertion hole 50 is provided in the vicinity of the rib 48 in the base portion 43, and a fitting portion is provided in the vicinity of the rib 49 in the left and right fastening portions 47 of the connecting frame 45 facing the bolt insertion hole 50.
  • a plurality of female screw holes 51 are provided on the left and right sides of 46. As shown in FIG. 15, bolts 52 inserted through the bolt insertion holes 50 are screwed into the female screw holes 51 from the rear of the base portion 43, and the bolts 52 are connected to the base portion 43 on the left and right sides of the connection frame 45.
  • the fixing portion 47 is fixed.
  • the left and right fastening portions 47 in the connection frame 45 are divided into two parts on the left and right sides, and a plurality of bolt insertion holes 53 are provided in these divided portions 47A so that they can face the bolt insertion holes 53.
  • the bolts 55 are inserted and screwed from the front through the bolt insertion holes 53 toward the female screw holes 54 provided on the front surface of the base portion 43, so that the divided portion 47A is fixed to the front surface of the base portion 43. It has come to be.
  • the base 43 can be easily elastically deformed with respect to the load applied to the center of the rear surface of the base 43 during the reclining of the backrest 36, and the stress concentration can be reduced. Dispersion can be achieved, and an allowable range of processing accuracy for the base 43 can be expanded.
  • the vicinity of the female screw hole 51 in the connecting frame 45 is a protruding portion 56 protruding rearward, and this protruding portion 56 is a recess formed in the vicinity of the bolt insertion hole 50 of the base portion 43 in the fastened state as shown in FIG. 57 can be engaged.
  • a groove portion 58 is formed on the rear surface of the fastening portion 47 in the connecting frame 45, and the groove portion 58 is opposed to the front surface of the opposed end portions 44 a and 44 a in the cutout portion 44 of the base portion 43, thereby
  • the engaging groove portion 42 provided on the vertical frame portion 40B and the engaging groove portion 46a provided on the lower surface of the fitting portion 46 can communicate with each other, and the edge member 37a provided on the peripheral edge portion of the tension member 37 is engaged. It has come to be.
  • the upholstery member 37 has an engagement groove 41, 42 and a groove 58 formed on the peripheral edge of the main frame 40, and an edge member 37a provided on the peripheral edge of the upholstery 37 is directed rearward from the front side of the main frame 40.
  • an edge member 37a provided on the peripheral edge of the upholstery 37 is directed rearward from the front side of the main frame 40.
  • the upholstery material 37 is preferably a net-like or mesh-like material in which a high-strength plastic or other elastic fiber is knitted or woven into a net shape, but is simply a woven fabric, a synthetic resin sheet, a porous sheet, or the like. You may form with a material etc.
  • the tension member 37 is folded around the periphery of the main frame 40 so as to be wound from the front side toward the rear, and the engagement grooves 41, 42, 46 a formed on the periphery of the main frame 40 are inserted into the engagement groove portions 41, 42, 46 a.
  • the tension member 37 is attached to the peripheral portion of the main frame 40 in a tensioned state by engaging the edge member 37 a provided on the peripheral portion.
  • the left and right side vertical frame portions 40B of the main frame 40 are expanded to an initial state using the elastic return force, and are connected to the front surface of the base portion 43 with further tension applied to the tension member 37.
  • the rear surface of the frame 45 is assembled, and the fitting part 46 of the connecting frame 45 is fitted so that the left and right end faces can come into contact with the contact part 48a on the opposing surface between the opposing end parts 44a, 44a of the cut part 44.
  • the left and right fastening portions 47, 47 in the connection frame 45 are fastened by the bolts 52, thereby connecting the opposed end portions 44a, 44a of the cutout portion 44 to each other.
  • the tension member 37 can be stretched with high work efficiency without performing complicated processing, and the tension of the tension member 37 can be uniformly maintained over the entire frame 39.
  • a downward claw is provided on the rear upper edge of the fastening part 47 and the split part 47A, and an upward claw is provided on the lower rear edge thereof. May be engaged with the front surface of the base portion 43 so that the vertical displacement of the connecting frame 45 with respect to the base portion 43 may be effectively prevented.
  • the upper portion of the backrest support rod 9 constituting the backrest support frame is connected to the rear portion of the frame body 39 by being pivotally supported. That is, as shown in FIG. 10, the space portion 38 is positioned so as to be opposed to each other in the left-right direction at substantially the middle position in the up-down direction on the inner edge in the left-right direction of the left and right vertical frame portions 40B of the main frame 40. A pair of left and right projecting portions 59 projecting inward toward the rear are formed to bulge rearward. At the rear end of the overhanging portion 59, as shown in FIG. 8, the upper end portions of the left and right standing rods 9d of the backrest supporting rod 9 can be moved substantially in the left-right direction so that the reclining operation of the backrest 36 can be followed.
  • the left and right overhangs 59 are inclined inward toward each other so that the center axis thereof can be aligned with the concave curved surface facing forward in plan view of the frame 39 (see FIGS. 10 and 12). ), And tilted upward toward the front so as to match the rearward tilt angle of the frame 39 (see FIG. 9).
  • a convex shaft 61 fixed by a fixing screw 60 is provided so as to protrude forward on the front surface of the upper end portion of the left and right standing rods 9 d in the backrest support rod 9.
  • the front end of the convex shaft 61 is a spherical sliding contact surface 62, and the sliding contact surface 62 is formed with a shaft hole 63 extending substantially in the left-right direction.
  • tapered hole portions 64 and 64 are formed which gradually increase in diameter toward the outside from both the left and right sides from the center portion of the sliding contact surface body 62.
  • the overhanging portion 59 of the side vertical frame portion 40B is provided with a fitting hole 65 that opens rearward.
  • the fitting hole 65 has a receiving hole 66 that opens backward.
  • the member 67 is fitted.
  • the sliding contact surface body 62 of the convex shaft 61 is inserted into the receiving hole 66 of the receiving cylinder member 67 from the rear side so as to be slidable.
  • 68, and the left and right end portions of the retaining pin 68 are inserted and locked in locking holes 69 provided on the left and right of the receiving tube member 67, thereby locking the convex shaft 61 and the receiving tube member 67.
  • a bolt shaft 70 protrudes forward from the front end of the receiving member 67, and the bolt shaft 70 passes through the bottom of the fitting hole 65 of the projecting portion 59.
  • the tube member 67 is projected through the hole 71 toward the front surface side of the projecting portion 59, and the nut member 72 is screwed and fastened to the projecting shaft portion 70a from the front, so that the receiving tube member 67 can be tightened.
  • the fitting portion 65 of the protruding portion 59 is firmly fixed. .
  • the upper end portions of the left and right standing rods 9d of the backrest supporting rod 9 can be rotated around the axis of the retaining pin 68, and can also be rotated at a required angle in a direction deviating from the axis, thereby
  • the rear part 59 is connected to the rear part.
  • a buffer member 73 made of a soft elastic body such as elastomer is sandwiched between the front surface of the upper end portion of the standing rod 9d and the rear end surface of the overhang portion 59. This buffer member 73 can prevent the connection part of the frame 39 and the upper part of the backrest support rod 9 from being worn out or damaged with the long-term use of the chair.
  • a cap member 74 is crowned from the front of the overhanging portion 59 to the fastening portion between the protruding shaft portion 70a of the bolt shaft 70 and the nut 72 exposed in front of the overhanging portion 59, and the fastening portion is exposed to the outside. Prevents exposure.
  • the cap member 74 is attached to the front surface of the projecting portion 59 by press-fitting a fixing rod 75 projecting rearward from the inner center thereof into a fixing hole 76 opened at the front end of the bolt shaft 70. Yes.
  • a gap a is provided at a desired interval between the front surface of the cap member 74 and the rear surface of the tension member 37 stretched on the front surface of the frame body 39, such as when reclining the backrest 36. Even if the tension member 37 is bent rearward by the back of the seated person, the bolt shaft 69 and the nut 72 are prevented from contacting the cap member 74 by the gap a or by elastic deformation of the cap member 74.
  • the fastening portion is provided with a cushioning action so that it does not directly hit the back of the seated person.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

L'invention porte sur un siège, configuré de telle sorte qu'une tige de support de dossier ne vient pas en contact avec un objet lorsque le siège pivote, et est ainsi empêché de façon fiable d'endommager l'objet ou d'être endommagé par l'objet, et de telle sorte que le siège utilise un nombre réduit de pièces, a une structure simple, et peut être assemblé facilement. Un siège comporte des parties avant de sections dirigées vers l'avant (9b) d'une tige de support de dossier (9) qui sont montées sur une base de support (5) supportée par un corps de pied (3) et supportant un siège (7). La tige de support de dossier (9) est formée sous une forme de L en vue de côté et comprend des sections surélevées dirigées vers le haut (9a), et les sections dirigées vers l'avant (9b). Les sections surélevées dirigées vers le haut (9a) et les sections dirigées vers l'avant (9b) sont reliées entre elles par l'intermédiaire d'une section incurvée (9c), et les sections surélevées (9a) supportent un dossier (6). Un revêtement protecteur (11) recouvre au moins la partie de la tige de support de dossier (9) qui s'étend de la surface arrière de la section incurvée (9c) à la surface inférieure de celle-ci.
PCT/JP2009/066329 2008-10-16 2009-09-18 Siège WO2010044331A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP09820509A EP2347679B1 (fr) 2008-10-16 2009-09-18 Siège
CA2752446A CA2752446A1 (fr) 2008-10-16 2009-09-18 Siege
US13/124,423 US20110198907A1 (en) 2008-10-16 2009-09-18 Chair
CN200980140462.0A CN102176847B (zh) 2008-10-16 2009-09-18 椅子

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2008267410A JP5378747B2 (ja) 2008-10-16 2008-10-16 椅子
JP2008-267410 2008-10-16
JP2009-042050 2009-02-25
JP2009042050A JP5543117B2 (ja) 2009-02-25 2009-02-25 椅子の背凭れ装置

Publications (1)

Publication Number Publication Date
WO2010044331A1 true WO2010044331A1 (fr) 2010-04-22

Family

ID=42106496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/066329 WO2010044331A1 (fr) 2008-10-16 2009-09-18 Siège

Country Status (6)

Country Link
US (1) US20110198907A1 (fr)
EP (1) EP2347679B1 (fr)
KR (1) KR20110084241A (fr)
CN (1) CN102176847B (fr)
CA (1) CA2752446A1 (fr)
WO (1) WO2010044331A1 (fr)

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JP2020062193A (ja) * 2018-10-17 2020-04-23 株式会社オカムラ 椅子の背凭れおよびそれを備えた椅子、背凭れの組み立て方法
JP2020062194A (ja) * 2018-10-17 2020-04-23 株式会社オカムラ 椅子の背凭れ、およびそれを備える椅子

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USD701053S1 (en) 2012-09-20 2014-03-18 Steelcase Inc. Chair
USD683150S1 (en) 2012-09-20 2013-05-28 Steelcase Inc. Chair
US8998339B2 (en) 2012-09-20 2015-04-07 Steelcase Inc. Chair assembly with upholstery covering
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USD697727S1 (en) 2012-09-20 2014-01-21 Steeelcase Inc. Chair
USD688907S1 (en) 2012-09-20 2013-09-03 Steelcase Inc. Arm assembly
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USD699061S1 (en) 2012-09-20 2014-02-11 Steelcase Inc. Arm assembly
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USD702981S1 (en) 2012-09-20 2014-04-22 Steelcase Inc. Chair
USD694537S1 (en) 2012-09-20 2013-12-03 Steelcase Inc. Chair
USD695034S1 (en) 2012-11-13 2013-12-10 Steelcase Inc. Chair
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US10743677B2 (en) * 2015-06-29 2020-08-18 Herman Miller, Inc. Attachment structure for suspension seating
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JP2012010936A (ja) * 2010-06-30 2012-01-19 Kokuyo Co Ltd 椅子
JP2020062193A (ja) * 2018-10-17 2020-04-23 株式会社オカムラ 椅子の背凭れおよびそれを備えた椅子、背凭れの組み立て方法
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Also Published As

Publication number Publication date
EP2347679A1 (fr) 2011-07-27
KR20110084241A (ko) 2011-07-21
EP2347679B1 (fr) 2013-03-13
CA2752446A1 (fr) 2010-04-22
US20110198907A1 (en) 2011-08-18
CN102176847B (zh) 2014-04-09
EP2347679A4 (fr) 2012-03-07
CN102176847A (zh) 2011-09-07

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