JP2008119221A - Backrest device of chair - Google Patents

Backrest device of chair Download PDF

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Publication number
JP2008119221A
JP2008119221A JP2006305987A JP2006305987A JP2008119221A JP 2008119221 A JP2008119221 A JP 2008119221A JP 2006305987 A JP2006305987 A JP 2006305987A JP 2006305987 A JP2006305987 A JP 2006305987A JP 2008119221 A JP2008119221 A JP 2008119221A
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Japan
Prior art keywords
back plate
frame
backrest
chair
backrest frame
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Granted
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JP2006305987A
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JP4948975B2 (en
Inventor
Hiroshi Masunaga
浩 益永
Yoichiro Oda
洋一郎 小田
Ryo Igarashi
僚 五十嵐
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Okamura Corp
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Okamura Corp
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Priority to JP2006305987A priority Critical patent/JP4948975B2/en
Application filed by Okamura Corp filed Critical Okamura Corp
Priority to PCT/JP2007/071773 priority patent/WO2008056762A1/en
Priority to CN2007800415510A priority patent/CN101573061B/en
Priority to EP20070831504 priority patent/EP2092855B1/en
Priority to AT07831504T priority patent/ATE555693T1/en
Priority to KR20097011982A priority patent/KR101090648B1/en
Priority to CA 2756711 priority patent/CA2756711C/en
Priority to US12/513,949 priority patent/US8172332B2/en
Priority to CA 2669068 priority patent/CA2669068A1/en
Publication of JP2008119221A publication Critical patent/JP2008119221A/en
Application granted granted Critical
Publication of JP4948975B2 publication Critical patent/JP4948975B2/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/02—Upholstery attaching means
    • A47C31/023—Upholstery attaching means connecting upholstery to frames, e.g. by hooks, clips, snap fasteners, clamping means or the like

Abstract

<P>PROBLEM TO BE SOLVED: To provide a backrest device of a chair, capable of increasing the supporting rigidity of a back panel by a backrest frame, and allowing a seated person to feel comfortable as if wrapped from left and right sides. <P>SOLUTION: The backrest device of the chair supports the back panel 3 made of a hard elastic body such as synthetic resin to the front surface of the backrest frame 2 extended upward from the rear of a seat body 1 of the chair. At least left and right sides and the lower end of the back panel 3 are frame parts 4, and the region inside the frame parts 4 is a flexible part 5 to be elastically deformed with the backward loads of the back of the seated person. Both the back panel 3 and the backrest frame 2 are approximately V-shaped as seen from a side, bending in such a way that slightly upper regions from the lower ends project forward. The back panel 3 is supported to the backrest frame 2 in such a way as relatively rotatable around the axes in the vertical direction in left and right sides of at least the bending parts 7a and 7b and the vicinity of the upper ends in the frame parts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、座体の後部から上方に延出した背凭れフレームの前面に、合成樹脂等の硬質弾性体からなる背板を支持してなる椅子の背凭れ装置に関する。   The present invention relates to a chair backrest device in which a back plate made of a hard elastic body such as a synthetic resin is supported on a front surface of a backrest frame extending upward from a rear portion of a seat body.

背凭れフレームの前面に、硬質弾性体からなる背板を取り付けた椅子は、たとえば特許文献１により公知である。
同文献に記載される発明においては、背板の上部に上下方向の長孔を穿設し、この長孔と、背凭れフレームの上部に設けた突軸とを係合させて上下方向への移動を可能とするとともに、背凭れフレームの下部に、円弧状で上向きに開口する左右方向の嵌合溝を設けた包持片を前向きに突設し、背板に、前記包持片と対応する位置に、前記嵌合溝に上方より圧嵌される左右方向の膨出部を設けて、背板を背凭れフレームに支持してある。
これにより、背板が後向きに撓曲可能となっている。しかし、この背板においては、着座者を左右側方から包み込むような撓曲は得られなかった。
特開２００１−１２８７８５号公報 A chair in which a back plate made of a hard elastic body is attached to the front surface of a backrest frame is known from Patent Document 1, for example.
In the invention described in this document, a long hole in the vertical direction is formed in the upper part of the back plate, and this long hole is engaged with a projecting shaft provided in the upper part of the backrest frame so as to move in the vertical direction. A holding piece with a left and right fitting groove that opens upward in the shape of an arc at the lower part of the backrest frame is projected forward and corresponds to the holding piece on the back plate. In this position, a bulging portion in the left-right direction that is press-fitted into the fitting groove from above is provided, and the back plate is supported by the back frame.
As a result, the back plate can be bent backward. However, in this back plate, bending that encloses the seated person from the left and right sides was not obtained.
JP 2001-128785 A

本発明は、背板と背凭れフレームの両者の支持剛性を向上させて強固な支持力を得るとともに、快適な座り心地、特に着座者の背中による後向きの荷重によって、背板の左右側部が適度に撓曲し、着座者が左右側方から包み込まれるような快適な座り心地を容易に得ることができる椅子の背凭れ装置を提供することを目的とする。   The present invention improves the support rigidity of both the back plate and the backrest frame to obtain a strong support force, and makes the right and left sides of the back plate comfortable to sit on, particularly due to the backward load on the seated person's back. It is an object of the present invention to provide a chair backrest device that can be bent moderately and can easily provide a comfortable sitting comfort that allows a seated person to be wrapped from the left and right sides.

本発明によると、上記課題は、特許請求の範囲における各請求項に記載するように、次のようにして解決される。
（１）座体の後部から上方に延出させた背凭れフレームの前面に、合成樹脂等の硬質弾性体からなる背板を支持してなる椅子の背凭れ装置において、背板の少なくとも左右側部と下端部とを高剛性の枠部とし、この枠部より内方の部位を、着座者の背中による後向きの荷重によって弾性変形する可撓部とするとともに、背板と背凭れフレームの両者を、下端部よりも若干上方の部位が、前方へ突出するように屈曲する側面視ほぼくの字状とし、背板を、少なくとも枠部における前記屈曲部と上端部近傍とのそれぞれの左右側部において、上下方向の軸線まわりに相対的に回動可能に背凭れフレームに支持した椅子の背凭れ装置とする。 According to the present invention, the above-described problem is solved as follows, as described in each of the claims.
(1) In a backrest device for a chair, in which a back plate made of a hard elastic body such as a synthetic resin is supported on the front surface of a back frame extending upward from the rear portion of the seat body, at least the left and right sides of the back plate The upper part and the lower end part are made to be a highly rigid frame part, and the part inside the frame part is made to be a flexible part that is elastically deformed by a backward load from the seated person's back, and both the back plate and the backrest frame In a side view that is bent so that a portion slightly above the lower end protrudes forward, and the back plate is at least the left and right sides of the bent portion and the vicinity of the upper end in the frame portion. The chair backrest device is supported by the backrest frame so as to be relatively rotatable about the vertical axis.

（２）上記(１)項において、背板と背凭れフレームのいずれか一方に係合部を設け、他方に係止部として上下方向の軸部を設け、この軸部を上下方向の軸線まわりに相対的に回動可能に前記係合部に嵌合させることにより、背板を、背凭れフレームに支持する。   (2) In the above item (1), an engaging portion is provided on one of the back plate and the backrest frame, and a vertical shaft portion is provided on the other side as a locking portion, and this shaft portion is arranged around the vertical axis. The back plate is supported on the backrest frame by being fitted to the engaging portion so as to be relatively rotatable.

（３）上記(１)項または(２)項において、背板の後面における前記屈曲部よりも上方の左右側部と、背凭れフレームの前面との間に、着座者の背中による後向きの荷重により、背板の前記可撓部が後方に撓んで湾曲しうるように、撓み空間を設ける。   (3) In the above paragraph (1) or (2), a backward load caused by the back of the seated person between the left and right side portions above the bent portion on the rear surface of the back plate and the front surface of the backrest frame Thus, a bending space is provided so that the flexible portion of the back plate can bend and curve backward.

（４）上記(３)項において、背凭れフレームにおける左右１対の縦フレームの前記屈曲部よりも上方における横断面を、後向きに突出するハ字状とすることにより撓み空間を設ける。   (4) In the above item (3), a bending space is provided by making the cross section above the bent portion of the pair of left and right vertical frames in the backrest frame into a C shape protruding rearward.

（５）上記(１)項〜(４)項のいずれかにおいて、背板の枠部後面に、上下方向に延びるリブを設ける。   (5) In any one of the above items (1) to (4), a rib extending in the vertical direction is provided on the rear surface of the frame portion of the back plate.

（６）上記(１)項〜(５)項のいずれかにおいて、背板の前記可撓部において、前記屈曲部よりも上方の部位の前後方向の肉厚を、前記屈曲部における前後方向の肉厚よりも大きく形成する。   (6) In any one of the above items (1) to (5), in the flexible portion of the back plate, the thickness in the front-rear direction of the portion above the bent portion is set in the front-rear direction of the bent portion. Form larger than the wall thickness.

（７）上記(６)項において、背板の前記屈曲部よりも上方の可撓部における前後方向の肉厚を、左右の枠部から左右方向の中央へ向かうにしたがって漸次大きくなるように形成する。   (7) In the above item (6), the thickness in the front-rear direction of the flexible portion above the bent portion of the back plate is formed so as to gradually increase from the left and right frame portions toward the center in the left-right direction. To do.

（８）上記(６)項において、背板の前記屈曲部よりも上方の可撓部における前後方向の肉厚を、上下方向の中央部を、この中央部の上下外方よりも大きく形成する。   (8) In the above item (6), the thickness in the front-rear direction of the flexible portion above the bent portion of the back plate is formed such that the central portion in the vertical direction is larger than the upper and lower outer sides of the central portion. .

本発明によると、次のような効果が奏せられる。
請求項１記載の発明によれば、背板の少なくとも左右側部と下端部とを高剛性の枠部とし、背板と背凭れフレームの両者を、下端部よりも若干上方の部位が、前方へ突出するように屈曲する側面視ほぼくの字状とし、背板を、少なくとも枠部における前記屈曲部と上端部近傍とのそれぞれの左右側部において、背凭れフレームに支持してあるため、最も剛性に優れる位置で背板が支持されることになり、支持剛性が向上するとともに、下部における曲げ剛性が向上する。また、背板における枠部より内方の部位を、着座者の背中による後向きの荷重によって弾性変形する可撓部としてあるため、可撓部において快適な座り心地が提供されつつ、枠部により強固な支持力が得られる。さらに背板を、支持部において、上下方向の軸線まわりに回動可能に支持してあるため、着座者の背中による後向きの荷重による背板の左右側部における変位が容易となり、平面視において後向きに膨出する望ましい形状の撓曲が得られ、着座者が左右側方から包み込まれるような快適な座り心地を容易に得ることができる椅子の背凭れ装置が提供される。 According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, at least the left and right side portions and the lower end portion of the back plate are made to be a highly rigid frame portion, and both the back plate and the backrest frame are located at a position slightly above the lower end portion. Since the back plate is supported on the backrest frame at least on the left and right sides of the bent part and the vicinity of the upper end part at least in the frame part. The back plate is supported at the position having the highest rigidity, so that the support rigidity is improved and the bending rigidity in the lower part is improved. In addition, since the inner part of the frame on the back plate is a flexible part that is elastically deformed by a backward load from the back of the seated person, a comfortable sitting comfort is provided in the flexible part, and the frame part is stronger. Supportive force is obtained. Furthermore, since the back plate is supported by the support portion so as to be rotatable about the vertical axis, it is easy to displace the left and right sides of the back plate due to a backward load by the seated person's back, and in the plan view A chair backrest device is provided in which a flexure of a desired shape that bulges out is obtained, and a comfortable sitting comfort that a seated person is wrapped from the left and right sides can be easily obtained.

請求項２記載の発明によれば、上下方向の軸線まわりに回動可能で、かつ支持強度に優れる支持部を容易に得ることができる。   According to invention of Claim 2, the support part which can be rotated to the surroundings of the axis line of an up-down direction, and is excellent in support strength can be obtained easily.

請求項３記載の発明によれば、背板の左右側部が撓曲し易くなり、着座者が左右側方から包み込まれるような快適な座り心地を容易に得ることができる椅子の背凭れ装置が提供される。   According to the third aspect of the present invention, the backrest device of the chair can easily obtain a comfortable seating feeling such that the left and right sides of the back plate are easily bent and the seated person is wrapped from the left and right sides. Is provided.

請求項４記載の発明によれば、背凭れフレームの支持剛性を確保しつつ、撓み空間を容易に形成することができる。   According to the fourth aspect of the present invention, it is possible to easily form the bending space while ensuring the support rigidity of the backrest frame.

請求項５記載の発明によれば、背板の枠部における曲げ剛性が大きくなり、背板を背凭れフレームに一層安定して支持させることができる。   According to invention of Claim 5, the bending rigidity in the frame part of a backplate becomes large, and can support a backplate to a backrest frame more stably.

請求項６記載の発明によれば、着座者の背中による後向きの荷重により最も撓み易い部位が肉厚となっているため、この部位の過度の撓みが防止され、全体として座り心地の良い背板が得られる。   According to the sixth aspect of the present invention, the portion that is most likely to bend due to the backward load caused by the back of the seated person is thick, so that excessive bending of this portion is prevented, and the back plate is comfortable as a whole. Is obtained.

請求項７記載の発明によれば、背板の左右方向の中央部における過度の撓みが防止され、着座者が左右側方から包み込まれるような快適な座り心地を安定して得ることができる背板が容易に得られる。   According to the seventh aspect of the present invention, excessive bending at the center portion in the left-right direction of the back plate is prevented, and a comfortable seating comfort that allows the seated person to be wrapped from the left and right sides can be stably obtained. A board is easily obtained.

請求項８記載の発明によれば、請求項７に記載の発明の効果が一層良好に奏せられる。   According to the invention described in claim 8, the effect of the invention described in claim 7 can be further improved.

以下、本発明の実施形態を、図面を参照して説明する。
図１は、本発明を実施した椅子の側面図、図２は、図１におけるII−II線拡大端面図、図４は、図１におけるIV−IV線拡大端面図、図８は、背板の拡大正面図、図９は、背板の拡大背面図である。 Embodiments of the present invention will be described below with reference to the drawings.
1 is a side view of a chair embodying the present invention, FIG. 2 is an enlarged end view taken along line II-II in FIG. 1, FIG. 4 is an enlarged end view taken along line IV-IV in FIG. 1, and FIG. FIG. 9 is an enlarged rear view of the back plate.

図１に示すように、本発明における椅子は、座体１の後部から上方に延出された背凭れフレーム２の前面に、合成樹脂等の硬質弾性体からなる背板３が支持されている。   As shown in FIG. 1, in the chair according to the present invention, a back plate 3 made of a hard elastic body such as a synthetic resin is supported on the front surface of a backrest frame 2 extending upward from the rear portion of a seat body 1. .

背板３は、図８，図９に示すように、背板３の周縁、すなわち左右側部と上下端部とを高剛性の枠部４とし、このやや縦長のほぼ四角形の枠部４より内方の部位を、着座者の背中による後向きの荷重によって弾性変形する可撓部５としてある。この可撓部５は、前面から後面へ貫通する縦長の開口部６を多数設けることにより弾性変形が容易なように形成されている。   As shown in FIG. 8 and FIG. 9, the back plate 3 has a peripheral portion of the back plate 3, that is, left and right side portions and upper and lower end portions as a highly rigid frame portion 4, which is slightly longer than a substantially rectangular frame portion 4. The inner part is a flexible part 5 that is elastically deformed by a backward load from the back of the seated person. The flexible portion 5 is formed so as to be easily elastically deformed by providing a large number of vertically long openings 6 penetrating from the front surface to the rear surface.

背板３と背凭れフレーム２の両者は、図１に示すように、下端部よりも若干上方の部位が、前方へ突出するように屈曲する側面視ほぼくの字状となっている。   As shown in FIG. 1, the back plate 3 and the backrest frame 2 both have a substantially square shape in side view in which a portion slightly above the lower end is bent so as to protrude forward.

背板３は、枠部４における前記屈曲部７ａと上端近傍とのそれぞれの左右側部において、上下方向の軸線まわりに回動可能に背凭れフレーム２に支持されている。   The back plate 3 is supported on the backrest frame 2 so as to be rotatable about an axis in the vertical direction at the left and right side portions of the bent portion 7 a and the vicinity of the upper end of the frame portion 4.

図３は、図２におけるIII−III線断面図、図６は、図１における破線円VI内の要部拡大分解斜視図である。図１〜図３、および図６に示すように、背凭れフレーム２の上端近傍の左右側部に、それぞれ第１係止部８，８が設けられるとともに、背板３の上端近傍の左右側部にそれぞれ第１係合部９，９が設けられ、前記第１係止部８，８を、第１係合部９，９に下方から嵌合させることにより、背板３が背凭れフレーム２に上端部近傍において支持されている。   3 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 6 is an enlarged exploded perspective view of a main part in a broken-line circle VI in FIG. As shown in FIGS. 1 to 3 and 6, first locking portions 8 and 8 are provided on the left and right side portions near the upper end of the backrest frame 2, respectively, and the left and right sides near the upper end of the back plate 3. The first engaging portions 9 and 9 are provided in the respective portions, and the first locking portions 8 and 8 are fitted into the first engaging portions 9 and 9 from below so that the back plate 3 is mounted on the back frame. 2 is supported near the upper end.

図６に示すように、第１係止部８は、上下方向の第１軸部１０をもって形成され、この第１軸部１０の後面に設けられた上下方向の支持体１１により、背凭れフレーム２の前面に前向きに突設されている。   As shown in FIG. 6, the first locking portion 8 is formed with a first shaft portion 10 in the vertical direction, and a backrest frame is formed by a vertical support body 11 provided on the rear surface of the first shaft portion 10. The front surface of 2 is projected forward.

第１係合部９は、横断面がほぼＣ字状の一端がスリット状に開口する上下方向の筒状体１２の上面の一部を閉塞することにより形成されている。第１係止部８における第１軸部１０を、第１係合部９における筒状体１２内に下方から遊嵌状態で嵌合させるとともに、支持体１１を筒状体１２におけるスリット状開口１３内に嵌挿させることにより、第１軸部１０が、上下方向の軸線まわりに筒状体１２に対して相対的に回動可能に嵌合されている。   The first engagement portion 9 is formed by closing a part of the upper surface of the cylindrical body 12 in the vertical direction whose one end having a substantially C-shaped cross section opens in a slit shape. The first shaft portion 10 in the first locking portion 8 is fitted in the tubular body 12 in the first engaging portion 9 in a loosely fitted state from below, and the support body 11 is slit-shaped in the tubular body 12. The first shaft portion 10 is fitted so as to be rotatable relative to the cylindrical body 12 around the axis in the vertical direction by being fitted into the inner wall 13.

図５は、図４におけるＶ−Ｖ線断面図、図７は、図１における破線円VII内の要部拡大分解斜視図である。   5 is a cross-sectional view taken along line VV in FIG. 4, and FIG. 7 is an enlarged exploded perspective view of a main part in a broken line circle VII in FIG.

図１，図４，図５，図７に示すように、背板３の屈曲部７ａにおける左右側部に、それぞれ第２係止部１４，１４が設けられるとともに、背凭れフレーム２の屈曲部７ｂにおける左右側部に、それぞれ第２係合部１５，１５が設けられている。この第２係合部１５，１５に前記第２係止部１４，１４を前方から嵌合させることにより、背板３が背凭れフレーム２に屈曲部７ａ，７ｂにおいて支持されている。   As shown in FIGS. 1, 4, 5, and 7, second locking portions 14 and 14 are provided on the left and right sides of the bent portion 7 a of the back plate 3, respectively, and the bent portion of the backrest frame 2 is provided. 2nd engaging parts 15 and 15 are provided in the right-and-left side part in 7b, respectively. The back plate 3 is supported by the backrest frame 2 at the bent portions 7a and 7b by fitting the second engaging portions 14 and 14 into the second engaging portions 15 and 15 from the front.

図７に示すように、第２係合部１５は、左右１対の係合片１６，１６を、左右方向に適寸離間して設けられるとともに、両係合片１６，１６の遊端近傍の対向する内面１６ａ，１６ａを、平面視弧状となるように凹ませることにより形成されている。   As shown in FIG. 7, the second engagement portion 15 is provided with a pair of left and right engagement pieces 16, 16 that are separated from each other by an appropriate distance in the left-right direction, and in the vicinity of the free ends of both engagement pieces 16, 16. The inner surfaces 16a, 16a that face each other are recessed so as to have an arc shape in a plan view.

第２係止部１４としての第２軸部１７は、前記係合片１６よりもやや長い上下方向の軸体１８の上下面に、軸体１８の径よりもやや大きい上下板１９，１９を設けることにより形成されている。   The second shaft portion 17 as the second locking portion 14 has upper and lower plates 19, 19 slightly larger than the diameter of the shaft body 18 on the upper and lower surfaces of the shaft body 18 in the vertical direction slightly longer than the engagement piece 16. It is formed by providing.

第２係止部１４における軸体１８を、前方から第２係合部１５における１対の係合片１６，１６の遊端間の開口２０に押しつけて、前記開口２０を弾性変形により拡開させて、平面視弧状に形成された対向内面１６ａ，１６ａ間に嵌合させることにより、第２係止部１４における第２軸部１７が、上下方向の軸線まわりに相対的に回動可能に第２係合部１５に嵌合されている。   The shaft body 18 in the second locking portion 14 is pressed against the opening 20 between the free ends of the pair of engaging pieces 16 and 16 in the second engaging portion 15 from the front, and the opening 20 is expanded by elastic deformation. Thus, the second shaft portion 17 of the second locking portion 14 is relatively rotatable around the vertical axis by being fitted between the opposed inner surfaces 16a, 16a formed in an arc shape in plan view. The second engagement portion 15 is fitted.

図１０は、背板３を背凭れフレーム２に支持させる手順を示す図である。   FIG. 10 is a diagram showing a procedure for supporting the back plate 3 on the backrest frame 2.

まず、図１０(ａ)、図６に示すように、背板３を背凭れフレーム２の前方上方に位置させて、下方に移動させ、背凭れフレーム２における左右１対の縦フレームの上端近傍に設けられた第１係止部８の第１軸部１０を、背板３の枠部４の左右側部における上端部近傍に設けられた第１係合部９の筒状体１２に下方から遊嵌状態で嵌合させるとともに、第１軸部１０を背凭れフレーム２に固定している支持体１１を筒状体１２におけるスリット状開口１３内に嵌挿させて、図１０(ｂ)に示す状態とする。   First, as shown in FIG. 10A and FIG. 6, the back plate 3 is positioned at the upper front of the backrest frame 2, moved downward, and near the upper end of the pair of left and right vertical frames in the backrest frame 2. The first shaft portion 10 of the first locking portion 8 provided on the lower side of the cylindrical body 12 of the first engaging portion 9 provided in the vicinity of the upper end portion of the left and right side portions of the frame portion 4 of the back plate 3 is lowered. 10 (b), and the support body 11 that fixes the first shaft portion 10 to the backrest frame 2 is inserted into the slit-shaped opening 13 in the cylindrical body 12, The state shown in

次いで、図１０(ｂ)、図７に示すように、背板３の枠部４の左右側部における屈曲部７ａに設けられている第２係止部１４の軸体１８を、背凭れフレーム２の左右１対の縦フレームの屈曲部７ｂに設けられている第２係合部１５における１対の係合片１６，１６の遊端間の開口２０に、前方から押しつけて、前記開口２０を拡開させて、両係合片１６，１６間に嵌合させて、図１０(ｃ)に示す状態にする。   Next, as shown in FIGS. 10B and 7, the shaft body 18 of the second locking portion 14 provided in the bent portion 7 a on the left and right side portions of the frame portion 4 of the back plate 3 is attached to the backrest frame. The opening 20 is pressed against the opening 20 between the free ends of the pair of engaging pieces 16, 16 in the second engaging portion 15 provided in the bent portion 7 b of the pair of left and right vertical frames. Is expanded and fitted between the engagement pieces 16 and 16 to obtain the state shown in FIG.

これにより、背板３は、背凭れフレーム２に、左右側部における上端部近傍および屈曲部７ａ，７ｂの４箇所において、充分な強度をもって取付けられ支持される。   As a result, the back plate 3 is attached to and supported by the backrest frame 2 with sufficient strength in the vicinity of the upper end portion at the left and right side portions and the four bent portions 7a and 7b.

各支持部においては、軸部１０，１７が上下方向の軸線まわりに回動可能に支持されている。   In each support portion, the shaft portions 10 and 17 are supported so as to be rotatable around the vertical axis.

図１１，図１２，図１３は、それぞれ図８におけるXI-XI線端面図、XII−XII線端面図、XIII−XIII線端面図である。   11, FIG. 12, and FIG. 13 are an end view taken along line XI-XI, an end view taken along line XII-XII, and an end view taken along line XIII-XIII in FIG.

図１１に示すように、背板３における枠部４より内方の可撓部５において、屈曲部７ａよりも上方の部位における前後方向の肉厚は、左右の枠部４から左右方向の中央へ向かうにしたがって漸次大きくなっている。   As shown in FIG. 11, in the flexible portion 5 inward of the frame portion 4 in the back plate 3, the thickness in the front-rear direction at the portion above the bent portion 7 a is the center in the left-right direction from the left and right frame portions 4. It gradually becomes larger as you go to.

図１１と図１２を対比することにより理解されるように、背板３の枠部４より内方の可撓部５において、屈曲部７ａよりも上方の部位の前後方向の肉厚Ｄ１は、前記屈曲部７ａにおける肉厚ｄ１よりも大きく形成されている。   As understood by comparing FIG. 11 and FIG. 12, in the flexible portion 5 inward of the frame portion 4 of the back plate 3, the thickness D1 in the front-rear direction of the portion above the bent portion 7a is: It is formed larger than the wall thickness d1 in the bent portion 7a.

さらに、図１３に示すように、背板３の前記屈曲部７ａよりも上方の可撓部５における上下方向の中央部における前後方向の肉厚Ｄ２は、この中央部の上下外方における前後方向の肉厚ｄ２よりも大きく形成されている。   Furthermore, as shown in FIG. 13, the thickness D2 in the front-rear direction at the central portion in the vertical direction of the flexible portion 5 above the bent portion 7a of the back plate 3 is the front-rear direction in the upper and lower outward direction of this central portion. It is formed larger than the wall thickness d2.

このようにすることにより、背板３の屈強部７ａより上方の部位における可撓部５の中央部分の過度の撓みが防止され、前記可撓部５における中央部分以外の周辺部分が適度に変位し、図１１，図１３に破線で示すように、着座者の背を左右上下から包み込むように作用する背板３が得られる。   By doing so, excessive bending of the central portion of the flexible portion 5 in the portion above the bending portion 7a of the back plate 3 is prevented, and peripheral portions other than the central portion of the flexible portion 5 are appropriately displaced. Then, as shown by the broken lines in FIGS. 11 and 13, the back plate 3 is obtained that acts to wrap the back of the seated person from the left, right, top and bottom.

図１１，図１２に示すように、背板３における枠部４の後面には、上下方向に延びるリブ２１ａ，２１ｂが設けられている。これにより、枠部４の上下方向の曲げ剛性が向上し、好ましい適度の剛性を有する背板３が得られる。   As shown in FIGS. 11 and 12, ribs 21 a and 21 b extending in the vertical direction are provided on the rear surface of the frame portion 4 in the back plate 3. Thereby, the bending rigidity of the up-down direction of the frame part 4 improves, and the back board 3 which has preferable moderate rigidity is obtained.

図２，図４に示すように、背凭れフレーム２における左右１対の縦フレーム２ａ，２ａの屈曲部７ｂよりも上方における横断面は、後向きに突出するハ字状に形成されており、縦フレーム２ａの前面と、背板３の後面との間には、着座者の背中による後向きの荷重により、背板３の前記可撓部５が後方に撓んで湾曲しうるように、撓み空間２２が設けられている。   As shown in FIGS. 2 and 4, the cross section above the bent portion 7b of the pair of left and right vertical frames 2a and 2a in the backrest frame 2 is formed in a C-shape projecting rearwardly. Between the front surface of the frame 2a and the rear surface of the back plate 3, a bending space 22 is provided so that the flexible portion 5 of the back plate 3 can bend and bend backward due to a backward load by the back of the seated person. Is provided.

以上、代表的な実施形態を説明したが、たとえば、第１係止部８，第１係合部９と第２係止部１４，第２係合部１５との両者間で、具体的形態を相互に入れ換えたり、あるいは、背凭れフレーム２と背板３間で、第１係止部８と第１係合部９，または第２係止部１４と第２係合部１５とを入れ換えたりすることもできる。   As mentioned above, although typical embodiment was described, for example, between the 1st latching | locking part 8 and the 1st engaging part 9, and the 2nd latching | locking part 14 and the 2nd engaging part 15, a specific form is mentioned. Or the first locking part 8 and the first engaging part 9 or the second locking part 14 and the second engaging part 15 between the backrest frame 2 and the back plate 3. You can also.

本発明を実施した椅子の側面図である。It is a side view of the chair which implemented this invention. 図１におけるII−II線拡大端面図である。FIG. 2 is an enlarged end view taken along line II-II in FIG. 1. 図２におけるIII−III線断面図である。It is the III-III sectional view taken on the line in FIG. 図１におけるIV−IV線拡大端面図である。FIG. 4 is an enlarged end view taken along line IV-IV in FIG. 1. 図４におけるＶ−Ｖ線断面図である。It is the VV sectional view taken on the line in FIG. 図１における破線円VI内の要部拡大分解斜視図である。It is a principal part expansion disassembled perspective view in the broken-line circle VI in FIG. 同じく、図１における破線円VII内の要部拡大分解斜視図である。Similarly, it is a principal part expansion disassembled perspective view in the broken-line circle VII in FIG. 背板の拡大正面図である。It is an enlarged front view of a back board. 背板の拡大背面図である。It is an enlarged rear view of a back board. 背板を背凭れフレームに支持させる手順を示す図である。It is a figure which shows the procedure which makes a back plate support a backrest frame. 図８におけるXI−XI線端面図である。It is the XI-XI line end elevation in FIG. 同じく、図８におけるXII−XII線端面図である。Similarly, it is the XII-XII line | wire end view in FIG. 同じく、図８におけるXIII−XIII線端面図である。Similarly, it is an XIII-XIII line end view in FIG.

符号の説明Explanation of symbols

１ 座体
２ 背凭れフレーム
２ａ 縦フレーム
３ 背板
４ 枠部
５ 可撓部
６ 開口部
７ａ，７ｂ 屈曲部
８ 第１係止部
９ 第１係合部
１０ 第１軸部
１１ 支持体
１２ 筒状体
１３ スリット状開口
１４ 第２係止部
１５ 第２係合部
１６ 係合片
１６ａ 対向内面
１７ 第２軸部
１８ 軸体
１９ 上板、下板
２０ 開口
２１ａ，２１ｂ リブ
２２ 撓み空間 DESCRIPTION OF SYMBOLS 1 Seat body 2 Back frame 2a Vertical frame 3 Back board 4 Frame part 5 Flexible part 6 Opening part 7a, 7b Bending part 8 1st latching part 9 1st engaging part 10 1st axial part 11 Support body 12 Cylinder Shaped body 13 Slit-shaped opening 14 Second locking portion 15 Second engagement portion 16 Engagement piece 16a Opposing inner surface 17 Second shaft portion 18 Shaft body 19 Upper plate, lower plate 20 Opening 21a, 21b Rib 22 Deflection space

Claims (8)

座体の後部から上方に延出させた背凭れフレームの前面に、合成樹脂等の硬質弾性体からなる背板を支持してなる椅子の背凭れ装置において、
背板の少なくとも左右側部と下端部とを高剛性の枠部とし、この枠部より内方の部位を、着座者の背中による後向きの荷重によって弾性変形する可撓部とするとともに、背板と背凭れフレームの両者を、下端部よりも若干上方の部位が、前方へ突出するように屈曲する側面視ほぼくの字状とし、背板を、少なくとも枠部における前記屈曲部と上端部近傍とのそれぞれの左右側部において、上下方向の軸線まわりに相対的に回動可能に背凭れフレームに支持したことを特徴とする椅子の背凭れ装置。 In the backrest device of the chair formed by supporting a back plate made of a hard elastic body such as a synthetic resin on the front surface of the backrest frame extending upward from the rear part of the seat body,
At least the left and right side portions and the lower end portion of the back plate are made to be a highly rigid frame portion, and a portion inside the frame portion is made to be a flexible portion that is elastically deformed by a backward load from the back of the seated person, and the back plate And the backrest frame are formed in a substantially U shape in a side view so that the portion slightly above the lower end protrudes forward, and the back plate is at least near the bent portion and the upper end of the frame portion. And a backrest device for a chair, wherein the backrest device is supported on a backrest frame so as to be relatively rotatable about an axis in the vertical direction. 背板と背凭れフレームのいずれか一方に係合部を設け、他方に係止部として上下方向の軸部を設け、この軸部を上下方向の軸線まわりに相対的に回動可能に前記係合部に嵌合させることにより、背板を、背凭れフレームに支持したことを特徴とする請求項１記載の椅子の背凭れ装置。   An engagement portion is provided on one of the back plate and the backrest frame, and a vertical shaft portion is provided on the other side as a locking portion, and the shaft portion is rotatable relative to the vertical axis. The backrest device for a chair according to claim 1, wherein the backboard is supported by the backrest frame by being fitted to the joint portion. 背板の後面における前記屈曲部よりも上方の左右側部と、背凭れフレームの前面との間に、着座者の背中による後向きの荷重により、背板の前記可撓部が後方に撓んで湾曲しうるように、撓み空間を設けたことを特徴とする請求項１または２記載の椅子の背凭れ装置。   The flexible portion of the back plate bends backward and curves due to a backward load by the back of the seated person between the left and right side portions above the bent portion on the rear surface of the back plate and the front surface of the backrest frame. The chair backrest device according to claim 1, wherein a bending space is provided. 背凭れフレームにおける左右１対の縦フレームの前記屈曲部よりも上方における横断面を、後向きに突出するハ字状とすることにより撓み空間を設けたことを特徴とする請求項３記載の椅子の背凭れ装置。   The chair according to claim 3, wherein a bending space is provided by making a cross section above the bent portion of the pair of left and right vertical frames in the backrest frame into a C shape protruding rearward. Backrest device. 背板の枠部後面に、上下方向に延びるリブを設けたことを特徴とする請求項１〜４のいずれかに記載の椅子の背凭れ装置。   The backrest device for a chair according to any one of claims 1 to 4, wherein a rib extending in the vertical direction is provided on a rear surface of the frame portion of the back plate. 背板の前記可撓部において、前記屈曲部よりも上方の部位の前後方向の肉厚を、前記屈曲部における前後方向の肉厚よりも大きく形成したことを特徴とする請求項１〜５のいずれかに記載の椅子の背凭れ装置。   The thickness of the longitudinal direction of the site | part above the said bending part in the said flexible part of the backplate was formed more largely than the thickness of the front-back direction in the said bending part. The chair backrest device according to any one of the above. 背板の前記屈曲部よりも上方の可撓部における前後方向の肉厚を、左右の枠部から左右方向の中央へ向かうにしたがって漸次大きくなるように形成したことを特徴とする請求項６記載の椅子の背凭れ装置。   The thickness in the front-rear direction of the flexible portion above the bent portion of the back plate is formed so as to gradually increase from the left and right frame portions toward the center in the left-right direction. Chair backrest device. 背板の前記屈曲部よりも上方の可撓部における前後方向の肉厚を、上下方向の中央部を、この中央部の上下外方よりも大きく形成したことを特徴とする請求項６記載の椅子の背凭れ装置。   The thickness in the front-rear direction of the flexible portion above the bent portion of the back plate is formed such that the central portion in the vertical direction is larger than the upper and lower outer sides of the central portion. Chair backrest device.
JP2006305987A 2006-11-10 2006-11-10 Chair backrest device Expired - Fee Related JP4948975B2 (en)

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JP2006305987A JP4948975B2 (en) 2006-11-10 2006-11-10 Chair backrest device
CN2007800415510A CN101573061B (en) 2006-11-10 2007-11-09 Backrest device for chair
EP20070831504 EP2092855B1 (en) 2006-11-10 2007-11-09 Backrest device for chair
AT07831504T ATE555693T1 (en) 2006-11-10 2007-11-09 BACKREST DEVICE FOR CHAIR
PCT/JP2007/071773 WO2008056762A1 (en) 2006-11-10 2007-11-09 Backrest device for chair
KR20097011982A KR101090648B1 (en) 2006-11-10 2007-11-09 Chair backrest device
CA 2756711 CA2756711C (en) 2006-11-10 2007-11-09 Chair backrest device
US12/513,949 US8172332B2 (en) 2006-11-10 2007-11-09 Chair backrest device
CA 2669068 CA2669068A1 (en) 2006-11-10 2007-11-09 Chair backrest device

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JP2004129966A (en) * 2002-10-11 2004-04-30 Takano Co Ltd Backrest structure of chair
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JP2009112728A (en) * 2007-11-09 2009-05-28 Uchida Yoko Co Ltd Backrest attaching structure for chair
JP2010094449A (en) * 2008-10-20 2010-04-30 Takano Co Ltd Hinge mechanism and support structure of backrest of seat using the same
JP2016025956A (en) * 2008-12-12 2016-02-12 フォームウェイ ファーニチャー リミテッド Chair, support medium and component
JP2010240276A (en) * 2009-04-09 2010-10-28 Toyota Boshoku Corp Assembling structure of planar elastic body of vehicle seat
WO2011037430A2 (en) * 2009-09-25 2011-03-31 듀오백코리아 주식회사 Back support device for a chair
KR101044429B1 (en) 2009-09-25 2011-06-29 듀오백코리아 주식회사 Back supporting apparatus of a chair
WO2011037430A3 (en) * 2009-09-25 2011-08-18 듀오백코리아 주식회사 Back support device for a chair
GB2487502A (en) * 2009-09-25 2012-07-25 Duoback Korea Co Ltd Back support device for a chair
GB2487502B (en) * 2009-09-25 2016-03-02 Duoback Korea Co Ltd Back support device for a chair
JP2013183748A (en) * 2012-03-05 2013-09-19 Kokuyo Furniture Co Ltd Chair
KR101378062B1 (en) 2013-02-15 2014-03-27 (주) 파트라 Chair

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