JP5132917B2 - Chair backrest device - Google Patents

Chair backrest device Download PDF

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JP5132917B2
JP5132917B2 JP2006305985A JP2006305985A JP5132917B2 JP 5132917 B2 JP5132917 B2 JP 5132917B2 JP 2006305985 A JP2006305985 A JP 2006305985A JP 2006305985 A JP2006305985 A JP 2006305985A JP 5132917 B2 JP5132917 B2 JP 5132917B2
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back plate
frame
shaft
engaging
backrest
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JP2008119219A (en
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浩 益永
洋一郎 小田
僚 五十嵐
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Okamura Corp
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Okamura Corp
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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、上記の現状に鑑み、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。   In view of the above-mentioned present situation, the present invention facilitates comfortable sitting comfort in which the right and left side portions of the back plate are appropriately bent by a backward load by the seated person's back and the seated person is wrapped from the left and right sides. An object of the present invention is to provide a chair backrest device that can be obtained.

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、前記背板と背凭れフレームとのいずれか一方の左右側部に係合部を、同じく他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、かつ前記背板と背凭れフレームとのいずれか一方の左右側部における前記係合部または軸部より下方に、係合部を、同じくこの係合部に対向する他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、前記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ることにより、背板を背凭れフレームに支持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 front of the backrest frame from the rear was extended over the seat support, the backrest device of a chair formed by supporting a back plate made of a hard elastic material such as synthetic resin, rest the back plate and the back on one of the left and right sides of the frame, the engagement portion, similarly to the other of the left and right side portions, respectively a shaft portion in the vertical direction as a locking section, and one of said back plate and the backrest frame downward from the engaging portion or the shaft portion of one of the left and right side portions, the engagement portions, similarly to the other lateral side opposite to the engaging portions, respectively a shaft portion in the vertical direction as a locking section, the relatively rotatably fitted to Rukoto the engaging portion of the shaft portion about the vertical axis, and the backrest device of a chair which supports the back plate to the backrest frame.

)上記(1)項において、係合部を、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の上面の少なくとも一部を閉塞することにより形成するとともに、係止部としての軸部を、支持体をもって背板または背凭れフレームに固定し、かつ軸部を係合部の筒状体内に下方から遊嵌状態で嵌合るとともに、支持体を前記筒状体におけるスリット状の開口内に嵌挿ることにより、軸部を上下方向の軸線まわりに相対的に回動可能に係合部に嵌合る。 (2) formed by the (1) Oite in section the engagement portion, generally C-shaped end cross section is closed at least a portion of the upper surface of the vertical cylindrical body which is open to the slit-shaped to with, the shaft portion of the locking portion, and fixed to the back plate or the back rest frame with a support, and be fitted from below the shaft portion in the cylindrical body of the engaging portion in a loosely Rutotomoni, support the fitted to Rukoto in a slit shape in the opening of the body in the tubular body, it is fitting the shaft portion to rotate relatively engaging portion around vertical axis.

)上記(1)項において、係合部を、左右1対の係合片を、左右方向に適寸離間して設け、かつ両係合片の遊端近傍の対向する内面を、平面視弧状となるように凹ませることにより形成するとともに、係止部としての軸部を、前記係合片よりもやや長い上下方向の軸体の上下面に、軸体の径よりもやや大きい上下板を設けて形成し、かつ軸体を、前記1対の係合片の遊端間の開口を拡開させて、平面視弧状に形成された前記対向内面間に嵌合ることにより、係止部の軸部を、上下方向の軸線まわりに相対的に回動可能に係合部に嵌合る。 (3) above (1) Oite in section the engagement portion, the engagement piece of the right and left pair, provided Tekisun spaced in the lateral direction, and the opposing inner surfaces of the free end near the both engaging pieces , together with a more formed to be recessed so as to be viewed arcuate shaft portion of the locking portion, the upper and lower surfaces of the slightly longer vertical shaft than the engagement piece, than the diameter of the shaft formed by providing a slightly larger vertical plate, and a shaft, by expanding the opening between the free ends of the pair of engaging pieces, it fits between the opposing inner surfaces formed in plan view arc it allows the shaft portion of the locking portion, you fit relatively rotatably engaging part around vertical axis.

)上記()項において、背板と背凭れフレームにおける上下部のいずれか一方を、上記()項記載の係合部と係止部により、また他方を上記()項記載の係合部と係止部により、背板を背凭れフレームに支持する。 ( 4 ) In the above item ( 1 ), either the upper part or the lower part of the back plate or the backrest frame is described by the engaging part and the locking part described in the above item ( 2 ), and the other is described in the above item ( 3 ). The back plate is supported on the backrest frame by the engaging portion and the locking portion.

)上記(1)項〜()項のいずれかにおいて、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、着座者の背中の後向きの荷重によって弾性変形する可撓部とし、係合部または係止部を前記枠部に設ける。 ( 5 ) In any one of the above items (1) to ( 4 ), 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. A flexible portion that is elastically deformed by a backward load on the back is provided, and an engaging portion or a locking portion is provided on the frame portion.

)上記()項において、背板における前記可撓部を、前面から後面へ貫通する縦長の開口部を多数設けることにより形成する。 (6) In the above item (5), the flexible portion of the back plate, to Rikatachi formed by the provision a number of elongated openings through the rear surface from the front.

本発明によると、次のような効果が奏せられる。
上記(1)項に記載の発明によれば、背板と背凭れフレームとのいずれか一方の左右側部に係合部を、同じく他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、かつ前記背板と背凭れフレームとのいずれか一方の左右側部における前記係合部または軸部より下方に、係合部を、同じくこの係合部に対向する他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、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ることにより、背板を背凭れフレームに支持てあるため、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。
また、背板を背凭れフレームに、両者の左右側部における上部と下部において、上下方向の軸線まわりに回動可能な状態で支持してあるため、着座者が左右側方から、その上下方向に亘ってほぼ均一に包み込まれるような快適な座り心地が得られる。
According to the present invention, the following effects can be obtained.
According to the invention described in the above (1) , the engaging portion is provided on the left and right side portions of either the back plate or the backrest frame, and the engaging portion is provided on the other left and right side portion in the vertical direction. provided the shaft portion, respectively, and lower than the engaging portion or the shaft portion of either one of the left and right sides of said back plate and the backrest frame, the engagement portion, like the other facing the engagement portion the left and right side portions, respectively a shaft portion in the vertical direction as a locking section, the fitting to Rukoto the engaging portion to be relatively pivoted about the axis of the shaft portion vertically to the back plate Since it is supported by the backrest frame, the left and right sides of the back plate can be easily displaced by a backward load from the seated person's back, and a flexure of a desired shape that bulges backward in a plan view can be obtained. Easily obtain a comfortable sitting comfort It backrest device of a chair that can is provided.
In addition, since the back plate is supported on the back frame in a state that it can be rotated around the vertical axis at the upper and lower portions of the left and right sides of the both sides, the seat occupant can move in the vertical direction from the left and right sides. A comfortable sitting comfort is obtained that is almost uniformly wrapped.

上記(2)項に記載の発明によれば、係合部を、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の上面の少なくとも一部を閉塞することにより形成するとともに、係止部としての軸部を、支持体をもって背板または背凭れフレームに固定し、かつ軸部を係合部の筒状体内に下方から遊嵌状態で嵌合るとともに、支持体を前記筒状体におけるスリット状の開口内に嵌挿させることにより、軸部を上下方向の軸線まわりに相対的に回動可能に係合部に嵌合てあるため、回動が容易かつ円滑であるとともに、背板の上方への揺動が防止され、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。 According to the invention described in (2) above , the engaging portion is closed by closing at least a part of the upper surface of the cylindrical body in the vertical direction in which one end having a substantially C-shaped cross section is opened in a slit shape. and forming the shaft portion of the locking portion, and fixed to the back plate or the back rest frame with a support, and be fitted from below the shaft portion in the cylindrical body of the engaging portion in a loosely Rutotomoni, since the support by causing fitted in a slit shape in the opening in the tubular body, are fitted to the shaft portion to rotate relatively engaging portion around vertical axis, it is rotated It is easy and smooth, prevents the back plate from swinging upward, and provides a stable sitting comfort that allows the seated person to be wrapped from the left and right sides.

上記(3)項に記載の発明によれば、係止部と係合部によって構成される支持部における、上下方向の軸線まわりの回動が一層容易となり、着座者が左右側方から包み込まれる座り心地を一層得やすくなる。 According to the invention described in the above item (3), the support portion constituted by the locking portion and the engaging portion can be more easily rotated around the vertical axis, and the seated person is wrapped from the left and right sides. It makes it easier to get a comfortable seat.

上記(4)項に記載の発明によれば、支持部における、上下方向の軸線まわりの回動が容易であるとともに、背板の上方への揺動が効果的に防止される。 According to the invention described in the above item (4) , the support portion can be easily rotated about the vertical axis, and the back plate can be effectively prevented from swinging upward.

上記(5)項に記載の発明によれば、高剛性を有する枠部に係合部と係止部が設けられているため、背板が背凭れフレームに安定して支持されるとともに、枠部より内方の部位を弾性変形する可撓部としてあるため、着座者が左右側部から包み込まれる座り心地が安定して得られる。 According to the invention described in (5) above , since the engaging portion and the locking portion are provided in the highly rigid frame portion, the back plate is stably supported by the backrest frame, Since the inner part of the part is a flexible part that elastically deforms, the sitting comfort in which the seated person is wrapped from the left and right side parts can be obtained stably.

上記(6)項に記載の発明によれば、背板における枠部より内方の可撓部に、前後に貫通する縦長の多数の開口部を設けてあるため、可撓部が容易に撓曲し、柔らかく優しい感覚の座り心地が得られる。 According to the invention described in the above item (6) , since the flexible portion on the inner side of the frame portion of the back plate is provided with a number of vertically long openings penetrating back and forth, the flexible portion can be easily bent. It gives you a soft and gentle sitting feeling.

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, and this slightly longer vertically 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 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 an XII-XII line 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.

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 (6)

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、
前記背板と背凭れフレームとのいずれか一方の左右側部に係合部を、同じく他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、かつ前記背板と背凭れフレームとのいずれか一方の左右側部における前記係合部または軸部より下方に、係合部を、同じくこの係合部に対向する他方の左右側部に、係止部として上下方向の軸部をそれぞれ設け、前記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ることにより、背板を背凭れフレームに支持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,
On one of the left and right sides of said back plate and the backrest frame, the engagement portion, similarly to the other of the left and right side portions, respectively a shaft portion in the vertical direction as a locking portion, and the back plate and the back An engaging portion is provided below the engaging portion or the shaft portion on one of the left and right side portions of the drooping frame, and the other left and right side portions facing the engaging portion are provided as locking portions in the vertical direction. provided the shaft portion, respectively, by relatively rotatably fitted to Rukoto the engaging portion of the shaft portion about the vertical axis, and wherein the supporting the back plate to the backrest frame Chair backrest device.
係合部を、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の上面の少なくとも一部を閉塞することにより形成するとともに、係止部としての軸部を、支持体をもって背板または背凭れフレームに固定し、かつ軸部を係合部の筒状体内に下方から遊嵌状態で嵌合るとともに、支持体を前記筒状体におけるスリット状の開口内に嵌挿ることにより、軸部を上下方向の軸線まわりに相対的に回動可能に係合部に嵌合たことを特徴とする請求項1に記載の椅子の背凭れ装置。 The engaging portion is formed by closing at least a part of the upper surface of the cylindrical body in the vertical direction whose one end having a substantially C-shaped cross section is opened in a slit shape, and the shaft portion as the locking portion is with the support is fixed to the back plate or the backrest frame and to fit from below the shaft portion in the cylindrical body of the engaging portion in a loosely Rutotomoni, slit-shaped in the opening in said cylindrical body a support fitted by to Rukoto, backrest device of a chair according to claim 1, characterized in that the fitting shaft portion relatively rotatably engaging part around vertical axis on. 係合部を、左右1対の係合片を、左右方向に適寸離間して設け、かつ両係合片の遊端近傍の対向する内面を、平面視弧状となるように凹ませることにより形成するとともに、係止部としての軸部を、前記係合片よりもやや長い上下方向の軸体の上下面に、軸体の径よりもやや大きい上下板を設けて形成し、かつ軸体を、前記1対の係合片の遊端間の開口を拡開させて、平面視弧状に形成された前記対向内面間に嵌合ることにより、係止部の軸部を、上下方向の軸線まわりに相対的に回動可能に係合部に嵌合たことを特徴とする請求項1に記載の椅子の背凭れ装置。 A pair of left and right engagement pieces are provided with an appropriate distance in the left-right direction, and the opposing inner surfaces in the vicinity of the free ends of both engagement pieces are recessed so as to have an arc shape in plan view. with more form, the shaft portion of the locking portion, the upper and lower surfaces of the slightly longer vertical shaft than the engagement piece, formed by providing a slightly larger vertical plate than the diameter of the shaft, and the shaft the body, the by expanding the opening between the free ends of the pair of engaging pieces, the fitting to Rukoto between the opposing inner surfaces formed on the plan view arc, the shaft portion of the locking portion, the upper and lower backrest device of a chair according to claim 1, characterized in that fitted relatively rotatably engaging portion about the direction of the axis. 背板と背凭れフレームにおける上下部のいずれか一方を、請求項記載の係合部と係止部により、また他方を請求項記載の係合部と係止部により、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に記載の椅子の背凭れ装置。 One of the upper and lower portions of the back plate and the backrest frame is formed by the engaging portion and the engaging portion according to claim 2 , and the other is formed by the engaging portion and the engaging portion according to claim 3. 2. The chair backrest device according to claim 1, wherein the chair backrest device is supported by a frame. 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、着座者の背中の後向きの荷重によって弾性変形する可撓部とし、係合部または係止部を前記枠部に設けたことを特徴とする請求項1〜のいずれかに記載の椅子の背凭れ装置。 At least the left and right side portions and the lower end portion of the back plate are highly rigid frame portions, and the inner portion of the frame portion is a flexible portion that is elastically deformed by a backward load on the seated person's back, and the engagement portion or The backrest device for a chair according to any one of claims 1 to 4 , wherein a locking portion is provided on the frame portion. 背板における前記可撓部を、前面から後面へ貫通する縦長の開口部を多数設けることにより形成したことを特徴とする請求項5に記載の椅子の背凭れ装置。 The flexible portion of the back plate, the backrest device of a chair according to claim 5, characterized in that form Rikatachi by the provision a number of elongated openings through the rear surface from the front.
JP2006305985A 2006-11-10 2006-11-10 Chair backrest device Active JP5132917B2 (en)

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