JP6198317B2 - Board structure for chair and chair - Google Patents

Board structure for chair and chair Download PDF

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Publication number
JP6198317B2
JP6198317B2 JP2013222246A JP2013222246A JP6198317B2 JP 6198317 B2 JP6198317 B2 JP 6198317B2 JP 2013222246 A JP2013222246 A JP 2013222246A JP 2013222246 A JP2013222246 A JP 2013222246A JP 6198317 B2 JP6198317 B2 JP 6198317B2
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slit
pair
substrate
opening
chair
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JP2015083065A (en
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ハーフォード・アレキザンダー
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Okamura Corp
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Okamura Corp
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Priority to JP2013222246A priority Critical patent/JP6198317B2/en
Priority to PCT/JP2014/077790 priority patent/WO2015060229A1/en
Priority to CN201480058260.2A priority patent/CN105658115A/en
Publication of JP2015083065A publication Critical patent/JP2015083065A/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/02Seat parts
    • A47C7/16Seats made of wooden, plastics, or metal sheet material; Panel seats
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/02Seat parts
    • A47C7/28Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back

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

Description

本発明は、椅子用基板構造及び椅子に関する。   The present invention relates to a chair substrate structure and a chair.

特許文献1−4には、椅子の背凭れを構成する基板を、開口部によって高い変形許容度を有する一方で、単体での強度も保たれた部材とする技術が記載されている。具体的には、椅子本体への連結部位である基板の外周部に開口部を形成しないこと、及び外周部の板厚を大とすることによって積極的に高剛性部位を形成すること、といった技術が開示されている。これらの技術には、基板の外周部を椅子本体の強度部材に支持することによって、基板の変形部位の変形許容度を相対的に大とし、大きな荷重をかけることを可能にするとともに、椅子本体によって強度を維持するという設計思想がある。   Patent Documents 1-4 describe a technique in which a substrate that constitutes a backrest of a chair is a member that has a high degree of deformation tolerance due to an opening, while maintaining a single strength. Specifically, a technique in which an opening is not formed in the outer peripheral portion of the substrate, which is a connection portion to the chair body, and a high-rigidity portion is actively formed by increasing the plate thickness of the outer peripheral portion. Is disclosed. In these technologies, by supporting the outer periphery of the board on the strength member of the chair body, the deformation tolerance of the deformation part of the board is relatively large, and a large load can be applied. There is a design philosophy of maintaining strength.

特許第3895084号公報Japanese Patent No. 3895084 特許第4295266号公報Japanese Patent No. 4295266 特許第5276304号公報Japanese Patent No. 5276304 特許第5298328号公報Japanese Patent No. 5298328

上記技術では、基板の変形部位の撓みを良好にするために、一定方向に長いスリット状の開口部を前記一定方向で複数並べて開口列とし、この開口列を前記一定方向でずらしつつ並列に並べることで、特にスリット状の開口部が拡幅する方向での撓みを良好にしている。
しかし、より大きな撓みを実現しようとして、単に開口部の大きさを大にしてしまうと、基板の剛性(荷重支持力)を損なう虞がある。また、開口部を避けて形成される残存部は、基板が外部に露出する場合には椅子のデザインにも影響するため、さらなる工夫が要望されている。
In the above technique, in order to improve the bending of the deformed portion of the substrate, a plurality of slit-like openings long in a certain direction are arranged in the certain direction to form an opening row, and the opening rows are arranged in parallel while being shifted in the certain direction. In particular, the bending in the direction in which the slit-shaped opening is widened is made favorable.
However, if the size of the opening is simply increased in order to achieve a greater deflection, the rigidity (load supporting force) of the substrate may be impaired. Further, since the remaining portion formed so as to avoid the opening affects the design of the chair when the substrate is exposed to the outside, further contrivance is demanded.

本発明は上記事情に鑑みてなされたもので、椅子の荷重支持部材を構成する基板の剛性及び撓み易さを維持しつつ、椅子のデザイン性の向上にも寄与する椅子用基板構造及びこれを用いた椅子を提供する。   The present invention has been made in view of the above circumstances, and the chair substrate structure that contributes to the improvement of the design of the chair while maintaining the rigidity and ease of bending of the substrate constituting the load support member of the chair, and the same Provide the chair used.

上記目的を達成するために、本発明は以下の手段を採用している。
すなわち、本発明に係る椅子用基板構造は、椅子の荷重支持部材に採用される椅子用基板構造において、前記荷重支持部材を構成する基板が、複数のスリット対を具備するスリット形成領域を備え、前記スリット対は、互いに並列に並ぶ一対のスリット状の開口部と、前記一対の開口部に挟まれる基板残存部と、を有し、このスリット対が、前記開口部の並び方向と直交する列方向に複数並んでスリット列を形成し、前記スリット形成領域は、前記スリット列を前記並び方向に複数並べて形成され、前記並び方向で隣り合う前記スリット列は、前記列方向で相互にずれて配置されることを特徴とする。
In order to achieve the above object, the present invention employs the following means.
That is, the board structure for a chair according to the present invention is a board structure for a chair adopted as a load support member of a chair, and the board constituting the load support member includes a slit forming region having a plurality of slit pairs, The slit pair has a pair of slit-shaped openings arranged in parallel to each other and a substrate remaining portion sandwiched between the pair of openings, and the slit pair is a row orthogonal to the arrangement direction of the openings. A plurality of slit rows are formed side by side in the direction, and the slit formation region is formed by arranging a plurality of slit rows in the row direction, and the adjacent slit rows in the row direction are shifted from each other in the row direction. It is characterized by being.

この構成によれば、一対のスリット状の開口部を並べたスリット対を基板に配列することで、スリット対が一つの大きな開口部として機能して基板の撓みを良好にする一方、この大きな開口部の中央を基板残存部が横断することで、基板残存部による適度な剛性が確保される。
すなわち、単に開口部の大きさを大とする場合と比べて、基板残存部による荷重支持力が得られるため、スリット形成領域の柔軟な変形を許容した上で、基板の剛性を確保することができる。
また、単独の開口部よりも大きいスリット対が規則的に並んで形成されることで、遠目にも幾何学模様として認識し易く、基板の開口面積を抑える効果と相まって、デザイン性の向上にも寄与することができる。
なお、前記荷重支持部材とは、座体及び背凭れの他、ランバーサポートやヘッドレスト等も含む概念である。
According to this configuration, by arranging a slit pair in which a pair of slit-shaped openings are arranged on the substrate, the slit pair functions as one large opening to improve the bending of the substrate. As the substrate remaining portion crosses the center of the portion, an appropriate rigidity is ensured by the substrate remaining portion.
That is, as compared with a case where the size of the opening is simply increased, a load supporting force is obtained by the remaining portion of the substrate, so that it is possible to ensure the rigidity of the substrate while allowing a flexible deformation of the slit forming region. it can.
In addition, the slit pairs that are larger than a single opening are regularly formed side by side, making it easy to recognize as a geometric pattern even at a distance, and in combination with the effect of reducing the opening area of the substrate, it also improves the design Can contribute.
In addition, the said load support member is a concept also including a lumbar support, a headrest, etc. other than a seat body and a backrest.

本発明に係る椅子用基板構造は、前記スリット列が、前記スリット対を前記列方向で等間隔に複数並べて形成され、前記並び方向で隣り合う前記スリット列が、前記列方向で相互に前記等間隔の半ピッチ分ずれて配置される構成でもよい。
この構成によれば、スリット対が千鳥状に配置されることとなり、スリット形成領域をより変形し易くすることができる。
In the board structure for a chair according to the present invention, the slit rows are formed by arranging a plurality of the slit pairs at equal intervals in the row direction, and the slit rows adjacent in the row direction are mutually equal in the row direction. It may be configured to be shifted by a half pitch of the interval.
According to this configuration, the slit pairs are arranged in a staggered manner, and the slit forming region can be more easily deformed.

また、本発明に係る椅子用基板構造は、複数の前記スリット対の少なくとも一つが、前記並び方向で当該スリット対の外側に凸となるように湾曲又は屈曲した前記開口部としての外凸開口部により形成される構成でもよい。
この構成によれば、スリット対内側の基板残存部の両端が幅狭となり、基板残存部による柔軟な荷重支持力を得ることができる。
この場合、一対の前記外凸開口部の間の基板残存部に、内側開口部がさらに形成される構成でもよい。
この構成によれば、スリット対内側の基板残存部自体を撓み易くし、基板残存部によるより柔軟な荷重支持力を得ることができる。
Moreover, the board | substrate structure for chairs which concerns on this invention is the outer convex opening part as the said opening part curved or bent so that at least one of the said several slit pair may become convex on the outer side of the said slit pair in the said alignment direction. The structure formed by may be sufficient.
According to this configuration, both ends of the substrate remaining portion inside the slit pair become narrow, and a flexible load supporting force by the substrate remaining portion can be obtained.
In this case, an inner opening may be further formed in the remaining substrate portion between the pair of outer convex openings.
According to this structure, the board | substrate remaining part itself inside a slit pair can be bent easily, and the more flexible load support force by a board | substrate residual part can be obtained.

また、本発明に係る椅子用基板構造は、複数の前記スリット対の少なくとも一つが、前記並び方向で当該スリット対の内側に凸となるように湾曲又は屈曲した前記開口部としての内凸開口部により形成される構成でもよい。
この構成によれば、スリット対内側の基板残存部の中間が幅狭となり、基板残存部自体を撓み易くして柔軟な荷重支持力を得ることができる。
この場合、前記内凸開口部により形成されて前記列方向で隣り合う前記スリット対の間に、端開口部がさらに形成される構成でもよい。
この構成によれば、スリット対内側の基板残存部の端部を撓み易くし、基板残存部によるより柔軟な荷重支持力を得ることができる。
In the chair substrate structure according to the present invention, at least one of the plurality of slit pairs is an inwardly convex opening as the opening that is curved or bent so as to be convex inward of the slit pair in the arrangement direction. The structure formed by may be sufficient.
According to this configuration, the middle portion of the substrate remaining portion inside the slit pair becomes narrow, and the substrate remaining portion itself can be easily bent to obtain a flexible load supporting force.
In this case, an end opening may be further formed between the slit pairs that are formed by the inner convex openings and are adjacent in the column direction.
According to this configuration, the end portion of the substrate remaining portion inside the slit pair can be easily bent, and a more flexible load supporting force by the substrate remaining portion can be obtained.

本発明に係る椅子は、脚体と、前記脚体に支持される座体及び背凭れと、を備える椅子において、前記背凭れが、上記の何れかの椅子用基板構造を具備した基板を有し、前記基板が、前記背凭れの腰部支持部の上方から下方に亘って前記スリット形成領域を形成し、前記スリット形成領域における前記腰部支持部よりも下方の部位が、前記開口部を前記列方向で分割して分割開口部とした分割スリット形成領域とされることを特徴とする。
この構成によれば、上記した種々の作用効果を奏する背凭れを構成することができる。
特に、分割スリット形成領域では、スリット対が開口部の形状に沿う複数の分割開口部に分割されるので、開口部の大きさが小さくなって基板の開口面積を抑え、かつ分割された分割開口部間にも基板残存部が残って基板の剛性を高める。
すなわち、背凭れにおける腰部支持部よりも下方では、分割スリット形成領域により基板の剛性を高め、着座者の腰部を良好に支持することができる。また、スリット形成領域全体で同様なパターンの模様を形成でき、デザイン性の向上にも寄与することができる。
A chair according to the present invention includes a leg, a seat supported by the leg, and a backrest, wherein the backrest includes a board having any one of the chair substrate structures described above. The substrate forms the slit forming region from above to the lower back support portion of the backrest, and the portion below the waist support portion in the slit formation region forms the opening portion in the row. It is a divided slit forming region that is divided in the direction to form a divided opening.
According to this configuration, it is possible to configure a backrest that exhibits the various effects described above.
In particular, in the split slit forming region, the slit pair is divided into a plurality of divided openings along the shape of the opening, so that the size of the opening is reduced to suppress the opening area of the substrate and the divided divided openings. Substrate remaining portions remain between the portions to increase the rigidity of the substrate.
That is, below the lower back support portion in the backrest, the divided slit formation region can increase the rigidity of the substrate and favorably support the seated person's lower back portion. Moreover, the same pattern can be formed in the entire slit forming region, which can contribute to improvement in design.

本発明によれば、椅子の荷重支持部材を構成する基板の剛性及び撓み易さを維持しつつ、椅子のデザイン性の向上にも寄与する椅子用基板構造及びこれを用いた椅子を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the board | substrate structure for chairs which contributes also to the improvement of the design property of a chair, and a chair using the same are maintained, maintaining the rigidity and ease of bending of the board | substrate which comprises the load support member of a chair. Can do.

この発明の実施形態における椅子を背凭れの背面側かつ上側方から見た斜視図である。It is the perspective view which looked at the chair in embodiment of this invention from the back side and upper side of the backrest. 上記椅子を背凭れの正面側から見た正面図である。It is the front view which looked at the said chair from the front side of the backrest. 図2のIII部拡大図である。It is the III section enlarged view of FIG. 図2のIV部拡大図である。It is the IV section enlarged view of FIG. 本実施形態の変形例を示す図3に相当する説明図である。It is explanatory drawing equivalent to FIG. 3 which shows the modification of this embodiment. 本実施形態の他の変形例を示す図3に相当する説明図である。It is explanatory drawing equivalent to FIG. 3 which shows the other modification of this embodiment.

以下、本発明の一実施形態について図面を参照して説明する。なお、以下の説明では、椅子の座体上に背凭れに背を向けて着座した着座者の「前方」を図中矢印FRで示し、前記着座者の「上方」を図中矢印UPで示し、上記着座者の「左方」を図中矢印LHで示す。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the “front” of the seated person sitting on the chair seat with the back facing back is indicated by arrow FR in the figure, and the “upward” of the seated person is indicated by arrow UP in the figure. The “left side” of the seated person is indicated by an arrow LH in the figure.

図1、図2に示すように、本実施形態の椅子1は、フロアF上に載置されるキャスタ7a付きの多岐脚7と、多岐脚7の中央部より起立する脚柱8と、脚柱8の上端部に取り付けられるボックス状の支基3と、支基3の上方に支持される座体4と、支基3にリクライニング可能に支持される枠状の背凭れ支持部材9と、背凭れ支持部材9の前面に取り付けられる背凭れ10と、を備える。
本実施形態では、多岐脚7、脚柱8、支基3及び背凭れ支持部材9を含む構造体を椅子本体2と称することがある。なお、図中の椅子1は、座体4の下面の左右側部又は支基3の左右側部に支柱が支持される左右一対の肘掛け6をさらに備える。
As shown in FIGS. 1 and 2, the chair 1 of the present embodiment includes a multi-leg 7 with casters 7 a placed on a floor F, a pedestal 8 standing from the center of the multi-leg 7, and a leg. A box-like support base 3 attached to the upper end of the column 8, a seat 4 supported above the support base 3, a frame-like backrest support member 9 supported on the support base 3 so as to be reclining, A backrest 10 attached to the front surface of the backrest support member 9.
In the present embodiment, the structure including the multi-leg 7, the pedestal 8, the support base 3, and the back support member 9 may be referred to as the chair body 2. In addition, the chair 1 in the drawing further includes a pair of left and right armrests 6 on which support columns are supported on the left and right side portions of the lower surface of the seat body 4 or the left and right side portions of the support base 3.

背凭れ10は、例えば合成樹脂製の基板14のみで構成される。背凭れ10(基板14)は、正面視(前面視)で概略矩形状をなし、その上下中間部よりもやや下側の高さとなる部位を境界部11として、上側部位の左右幅を下側部位の左右幅よりも広げて形成される。境界部11は、例えば肘掛け6の上面と同等の高さに設定される。以下、前記上側部位を幅広部12、下側部位を幅狭部13という。   The backrest 10 is composed of only a synthetic resin substrate 14, for example. The backrest 10 (substrate 14) has a substantially rectangular shape when viewed from the front (front view), and a portion having a height slightly lower than the upper and lower intermediate portions is defined as a boundary portion 11, and the left and right widths of the upper portion are on the lower side. It is formed wider than the lateral width of the part. The boundary portion 11 is set to a height equivalent to the upper surface of the armrest 6, for example. Hereinafter, the upper part is referred to as a wide part 12 and the lower part is referred to as a narrow part 13.

基板14は、その外周部を除いた領域を後に詳述するスリット対を多数形成したスリット形成領域15とし、外周部はスリット対を形成せずに比較的剛性の高い枠部16とした構成を有する。
枠部16は、背凭れ10の正面視矩形状の四辺に亘って連続的に形成される。枠部16における幅広部12の左右両側に位置する部位は、他の部位よりも左右幅を広げた幅広枠部16aとされる。これら左右の幅広枠部16aの背面(後面)に沿って、背凭れ支持部材9の左右の支持部9aがそれぞれ配置される。
The substrate 14 has a configuration in which a region excluding the outer peripheral portion is formed as a slit forming region 15 in which many slit pairs, which will be described in detail later, are formed, and the outer peripheral portion is formed as a frame portion 16 having relatively high rigidity without forming the slit pairs. Have.
The frame portion 16 is continuously formed over the four sides of the backrest 10 that are rectangular in a front view. The part located in the left and right both sides of the wide part 12 in the frame part 16 is a wide frame part 16a having a wider left and right width than other parts. The left and right support portions 9a of the backrest support member 9 are arranged along the back surfaces (rear surfaces) of the left and right wide frame portions 16a.

図中の背凭れ支持部材9は、左右の支持部9aと、背凭れ10の上端部の後方に離間した位置で左右の支持部9aの上端間を連結する上辺部9bと、左右の支持部9aの下端からそれぞれ幅狭部13の左右両側の後方に離間した位置で下方に延びる左右の下方延出部9cと、左右の下方延出部9cの下端間を連結する下辺部9dと、下辺部9dの左右中央部から支基3に向かって延びる基部9eと、を有する。なお、本実施形態の背凭れ支持部材9は、その下部が左右の下方延出部9cと下辺部9dとを有してU字形状をなすが、これに限らず、例えば下部が左右の支持部9aの下端と基部9eの上端とを連結するY字形状をなしてもよい。   The backrest support member 9 in the figure includes left and right support portions 9a, an upper side portion 9b that connects the upper ends of the left and right support portions 9a at positions spaced rearward of the upper end portion of the backrest 10, and left and right support portions. Left and right lower extending portions 9c extending downward from the lower ends of the narrow portions 13 from the lower ends of the narrow portions 13; a lower side portion 9d connecting the lower ends of the left and right lower extending portions 9c; And a base portion 9e extending from the left and right central portion of the portion 9d toward the support base 3. The backrest support member 9 of the present embodiment has a U-shaped lower portion having left and right downward extending portions 9c and a lower side portion 9d. However, the present invention is not limited to this. You may make the Y-shape which connects the lower end of the part 9a, and the upper end of the base 9e.

背凭れ10は、左右の幅広枠部16aをそれぞれ背凭れ支持部材9の左右の支持部9aに固定的に支持されるとともに、下端部の左右中間部を背凭れ支持部材9の下端部の左右中間部に固定的に支持される。背凭れ10は、比較的剛性の高い背凭れ支持部材9に対して可撓性に富み、背凭れ支持部材9への固定部を除く部位を着座者からの荷重により柔軟に撓ませる。他方、背凭れ10の強度剛性は背凭れ支持部材9を含む椅子本体2によって確保される。   In the backrest 10, the left and right wide frame portions 16 a are fixedly supported by the left and right support portions 9 a of the backrest support member 9, and the left and right middle portions of the lower end portion are fixed to the left and right lower end portions of the backrest support member 9. Fixedly supported by the middle part. The backrest 10 is rich in flexibility with respect to the backrest support member 9 having a relatively high rigidity, and flexes the portion excluding the fixing portion to the backrest support member 9 by the load from the seated person. On the other hand, the strength and rigidity of the backrest 10 is ensured by the chair body 2 including the backrest support member 9.

背凭れ10は、着座者の背中に沿うように、平面視(上面視)で後方に凸の湾曲形状をなし、かつ着座者の腰部を後方から支持し易いように、側面視で前記境界部11を前方に凸の頂部とした緩やかな屈曲形状とされる。境界部11は、着座者の腰部を後方から支持する腰部支持部11aを構成する。   The backrest 10 has a curved shape that is convex backward in plan view (top view) along the back of the seated person, and the boundary portion in side view so that the waist of the seated person can be easily supported from behind. 11 is a gently bent shape with a convex top. The boundary portion 11 constitutes a waist support portion 11a that supports the waist of the seated person from behind.

図3、図4に示すように、スリット形成領域15は、幅広部12では開口面積の割合が比較的大きい大スリット形成領域15aとされ、幅狭部13では開口面積の割合が比較的小さい小スリット形成領域15bとされる。スリット形成領域15の開口面積の割合は撓み変形のし易さに影響することから、大スリット形成領域15aは撓み変形が比較的し易く、小スリット形成領域15bは撓み変形が比較的し難い。   As shown in FIGS. 3 and 4, the slit forming region 15 is a large slit forming region 15 a having a relatively large opening area ratio in the wide portion 12, and a small opening area ratio in the narrow portion 13. The slit forming region 15b is used. Since the ratio of the opening area of the slit forming region 15 affects the ease of bending deformation, the large slit forming region 15a is relatively easy to bend and the small slit forming region 15b is relatively difficult to bend and deform.

図3を参照し、スリット形成領域15は、上下方向に長いスリット状の開口部を左右方向で一対並べてスリット対を形成し、このスリット対を上下方向で等間隔に複数並べてスリット列を形成し、さらにこのスリット列を左右方向で複数並べるとともに隣り合うスリット列を相互に上下方向で前記等間隔の半ピッチ分ずらした配置として形成される。換言すれば、スリット形成領域15は、スリット対を千鳥状に多数配置して形成される。以下、スリット形成領域15における左右方向を並び方向、上下方向を列方向ということがある。   Referring to FIG. 3, the slit forming region 15 forms a slit pair by arranging a pair of slit-like openings that are long in the vertical direction in the left-right direction, and forms a slit row by arranging a plurality of these slit pairs at equal intervals in the vertical direction. Further, a plurality of slit rows are arranged in the left-right direction, and adjacent slit rows are formed so as to be shifted from each other in the vertical direction by the half pitch at equal intervals. In other words, the slit forming region 15 is formed by arranging a large number of slit pairs in a staggered manner. Hereinafter, the left-right direction in the slit forming region 15 may be referred to as a row direction, and the vertical direction may be referred to as a column direction.

なお、スリット状の開口部とは、直線形状、屈曲形状及び湾曲形状等の種々の態様で所定方向に延びる幅狭な開口全般を示す。また、スリット対とは、同一又は線対称の開口部を並列に一対並べて形成される単位を示す。スリット対における一対の開口部は、少なくとも両端部が互いに分離することで認識される。   Note that the slit-shaped opening refers to a narrow opening generally extending in a predetermined direction in various forms such as a linear shape, a bent shape, and a curved shape. A slit pair indicates a unit formed by arranging a pair of identical or line-symmetric openings in parallel. The pair of openings in the pair of slits are recognized by separating at least both ends from each other.

大スリット形成領域15aのスリット対は、一対の開口部における並び方向の外側に凸となるように湾曲(又は屈曲)した外凸開口部21により形成される外凸スリット対22と、一対の開口部における並び方向の内側に凸となるように湾曲(又は屈曲)した内凸開口部25により形成される内凸スリット対26と、に分けられる。外凸スリット対22は、上下方向に複数並んで外凸スリット列23を形成し、内凸スリット対26は、上下方向に複数並んで内凸スリット列27を形成する。   A pair of slits in the large slit forming region 15a includes an outer convex slit pair 22 formed by an outer convex opening 21 curved (or bent) so as to be convex outward in the arrangement direction of the pair of openings, and a pair of openings. And an in-convex slit pair 26 formed by in-convex openings 25 that are curved (or bent) so as to be convex inward in the arrangement direction of the portions. A plurality of outer convex slit pairs 22 are arranged in the vertical direction to form outer convex slit rows 23, and a plurality of inner convex slit pairs 26 are arranged in the vertical direction to form inner convex slit rows 27.

外凸スリット列23における外凸スリット対22の上下方向の並びのピッチと、内凸スリット列27における内凸スリット対26の上下方向の並びのピッチとは、互いに同一とされる。また、外凸スリット対22(外凸開口部21)の上下幅と、内凸スリット対26(内凸開口部25)の上下幅とも互いに同一とされる。外凸スリット列23と内凸スリット列27とは、左右方向で交互に並び、かつ隣り合うもの同士で上下方向で半ピッチ分ずれて配置される。   The pitch in the vertical direction of the outer convex slit pair 22 in the outer convex slit row 23 and the pitch in the vertical direction of the inner convex slit pair 26 in the inner convex slit row 27 are the same. The vertical width of the outer convex slit pair 22 (outer convex opening portion 21) and the vertical width of the inner convex slit pair 26 (inner convex opening portion 25) are also the same. The outer convex slit rows 23 and the inner convex slit rows 27 are alternately arranged in the left-right direction, and are adjacent to each other and are shifted by a half pitch in the vertical direction.

図中符号21a,25aは各開口部21,25の上下端部、符号22a,26aは各スリット対22,26における一対の開口部21,25間に残る基板残存部、符号23a,27aは上下に並ぶ各スリット対22,26の間に残るスリット対間残存部、符号24,28は各スリット列23,27において基板残存部22a,26a及びスリット対間残存部23a,27aが連なって形成される基板残存列、符号29は隣り合うスリット列23,27の間に残るスリット列間残存列、をそれぞれ示す。   In the figure, reference numerals 21a and 25a are upper and lower ends of the openings 21, 25, reference numerals 22a and 26a are remaining substrate portions between the pair of openings 21 and 25 in the slit pairs 22 and 26, and reference numerals 23a and 27a are upper and lower. Remaining portions between the slit pairs remaining between the respective slit pairs 22 and 26 arranged in the same manner, reference numerals 24 and 28 are formed by connecting the remaining substrate portions 22a and 26a and the remaining portions 23a and 27a between the slit pairs in the respective slit rows 23 and 27. Substrate remaining rows 29, the reference numeral 29 indicates the remaining rows between the slit rows remaining between the adjacent slit rows 23 and 27, respectively.

外凸スリット対22の基板残存部22aの上下端部は、一対の外凸開口部21の上下端部21aが互いに近接することで左右幅が狭められる。これにより、外凸スリット対22の基板残存部22aにおける上下方向に沿う軸回りの捩じれも含めた変形が良好になる。外凸スリット対22の基板残存部22aの中央部には、上下に長い楕円形状の内側開口部22bがさらに形成される。   The upper and lower ends of the substrate remaining portion 22 a of the outer convex slit pair 22 are narrowed in the left-right width by the upper and lower ends 21 a of the pair of outer convex openings 21 being close to each other. Thereby, the deformation | transformation including the twist around the axis in the up-down direction in the board | substrate residual part 22a of the outer convex slit pair 22 becomes favorable. An elliptical inner opening 22b that is long in the vertical direction is further formed at the center of the substrate remaining portion 22a of the outer convex slit pair 22.

一方、内凸スリット対26の基板残存部26aの上下端部は、一対の内凸開口部25の上下端部25aが互いに離間することで左右幅が広げられる。上下に並ぶ内凸スリット対26の間のスリット対間残存部27aには、これを挟む内凸スリット対26における一対の内凸開口部25の上下端部25a間に入り込むように、上下に長い楕円形状の端部開口部26bが形成される。これにより、内凸スリット対26の基板残存部26aの変形が良好になる。基板残存部26aの中間部は左右幅が狭いので、基板残存部26a自体も柔軟に変形する。   On the other hand, the upper and lower end portions of the substrate remaining portion 26a of the pair of inner convex slits 26 are widened by separating the upper and lower end portions 25a of the pair of inner convex openings 25 from each other. The remaining portion 27a between the pair of inner convex slits 26 arranged vertically is long in the vertical direction so as to enter between the upper and lower end portions 25a of the pair of inner convex openings 25 in the pair of inner convex slits 26 sandwiching this. An elliptical end opening 26b is formed. Thereby, the deformation | transformation of the board | substrate residual part 26a of the inner convex slit pair 26 becomes favorable. Since the intermediate portion of the remaining substrate portion 26a has a narrow left-right width, the remaining substrate portion 26a itself is also flexibly deformed.

スリット列間残存列29における外凸スリット列23の各スリット対間残存部23aの左右両側(内凸スリット列27の各内凸スリット対26の左右両側)には、それぞれ上下に長い楕円形状の列間開口部29aが形成される。これにより、各基板残存列24,28及びスリット列間残存列29に概ね均等に上下に長い楕円形状の開口部が形成され、スリット形成領域15全体の可撓性の向上に寄与する。   On the left and right sides of the remaining portions 23a between the slit pairs of the outer convex slit row 23 (left and right sides of each inner convex slit pair 26 of the inner convex slit row 27) in the remaining rows 29 between the slit rows, respectively, elliptical shapes that are long vertically. Inter-column openings 29a are formed. As a result, an elliptical opening that is long in the vertical direction is formed in each of the remaining substrate rows 24 and 28 and the remaining rows 29 between the slit rows, which contributes to improving the flexibility of the entire slit forming region 15.

スリット形成領域15は、背凭れ10における前方に凸の腰部支持部11aを境に、その上方を大スリット形成領域15a、下方を小スリット形成領域15bとする。
図4を参照し、小スリット形成領域15bは、大スリット形成領域15aにおける上下に長いスリット状の開口部21,25をそれぞれ列方向で二分割して分割開口部31,35としたものである。これにより、分割開口部31,35間にも分割間残存部31a,35aが形成され、大スリット形成領域15aよりも開口面積が抑えられるとともに剛性が高められる。分割開口部31は分割前のスリット状の開口部21の形状に、分割開口部35は分割前のスリット状の開口部25の形状に、それぞれ沿うように形成されるため、スリット形成領域15全体で同様なパターンの模様が形成される。
The slit forming region 15 is defined as a large slit forming region 15a on the upper side and a small slit forming region 15b on the lower side with the waist support portion 11a convex forward in the backrest 10.
Referring to FIG. 4, the small slit forming region 15b is obtained by dividing the vertically long slit-like openings 21 and 25 in the large slit forming region 15a into two divided openings 31 and 35 in the column direction. . Thereby, the inter-division remaining portions 31a and 35a are also formed between the divided opening portions 31 and 35, and the opening area is suppressed and the rigidity is increased as compared with the large slit forming region 15a. Since the divided opening 31 is formed so as to follow the shape of the slit-shaped opening 21 before the division, and the divided opening 35 is formed so as to follow the shape of the slit-shaped opening 25 before the division, the entire slit forming region 15 is formed. A similar pattern is formed.

以下、スリット形成領域15の作用について説明する。
まず、背凭れ10(基板14)に着座者の身体から後向きの荷重が入力されると、各スリット対22,26をそれぞれ形成する一対の開口部21,25は、それぞれ上下方向に長い縦長であることから、左右方向(並び方向)に広がるように変形する。したがって、各スリット対22,26は、全体として左右方向に広がるように変形する。
また、左右方向に並ぶスリット対22,26は、相互に上下方向(列方向)にずれた状態にあることから、各スリット対22,26を形成する開口部21,25も上下方向にずれた状態となる。このため、各開口部21,25は、左右方向に広がる変形をする際に、左右方向で隣り合う開口部21,25に変形を阻害されずに変形することができる。
このとき、各スリット対22,26に基板残存部22a,26aが形成されていることから、各スリット対22,26の過度な広がりが抑制され、適度な剛性と良好な座り心地を維持することができる。
Hereinafter, the operation of the slit forming region 15 will be described.
First, when a backward load is input to the backrest 10 (substrate 14) from the body of the seated person, the pair of openings 21 and 25 that form the respective slit pairs 22 and 26 are vertically long and vertically long. Therefore, it is deformed so as to spread in the left-right direction (alignment direction). Therefore, each slit pair 22 and 26 is deformed so as to spread in the left-right direction as a whole.
Moreover, since the slit pairs 22 and 26 arranged in the left-right direction are in a state shifted from each other in the vertical direction (column direction), the openings 21 and 25 forming the slit pairs 22 and 26 are also shifted in the vertical direction. It becomes a state. For this reason, when the openings 21 and 25 are deformed to expand in the left-right direction, the openings 21 and 25 adjacent in the left-right direction can be deformed without being inhibited.
At this time, since the remaining substrate portions 22a and 26a are formed in the respective slit pairs 22 and 26, excessive spread of the respective slit pairs 22 and 26 is suppressed, and appropriate rigidity and good sitting comfort are maintained. Can do.

以上説明したように、上記実施形態における椅子用基板構造は、椅子1の荷重支持部材に採用されるもので、前記荷重支持部材を構成する基板14が、スリット状の開口部21,25を並列に一対並べて基板残存部22a,26aを挟んだスリット対22,26とし、前記スリット対22,26を前記開口部21,25の並び方向と直交する列方向で複数並べてスリット列23,27とし、前記スリット列23,27をさらに前記並び方向で複数並べるとともに、隣り合う前記スリット列23,27を前記列方向で相互にずらして配置してスリット形成領域15を形成したものである。   As described above, the board structure for a chair in the above embodiment is adopted as a load support member of the chair 1, and the board 14 constituting the load support member has the slit-like openings 21 and 25 arranged in parallel. A pair of slits 22 and 26 sandwiching the remaining substrate portions 22a and 26a, and a plurality of slit pairs 22 and 26 are arranged in a row direction perpendicular to the direction of the openings 21 and 25 to form slit rows 23 and 27. A plurality of the slit rows 23 and 27 are arranged in the arrangement direction, and the slit formation regions 15 are formed by arranging the adjacent slit rows 23 and 27 so as to be shifted from each other in the row direction.

この構成によれば、一対のスリット状の開口部21,25を並べたスリット対22,26を基板14に配列することで、スリット対22,26が一つの大きな開口部として機能して基板14の撓みを良好にする一方、この大きな開口部の中央を基板残存部22a,26aが横断することで、基板残存部22a,26aによる適度な剛性が確保される。
すなわち、単に開口部の大きさを大とする場合と比べて、基板残存部22a,26aによる荷重支持力が得られるため、スリット形成領域15の柔軟な変形を許容した上で、基板14の剛性を確保することができる。
また、単独の開口部よりも大きいスリット対22,26が規則的に並んで形成されることで、遠目にも幾何学模様として認識し易く、基板14の開口面積を抑える効果と相まって、デザイン性の向上にも寄与することができる。
According to this configuration, by arranging the slit pairs 22 and 26 in which the pair of slit-shaped openings 21 and 25 are arranged on the substrate 14, the slit pairs 22 and 26 function as one large opening and the substrate 14. On the other hand, the substrate remaining portions 22a and 26a cross the center of the large opening so that appropriate rigidity is ensured by the substrate remaining portions 22a and 26a.
That is, since the load supporting force by the remaining substrate portions 22a and 26a can be obtained as compared with the case where the size of the opening is simply increased, the rigidity of the substrate 14 is allowed after allowing the flexible deformation of the slit forming region 15. Can be secured.
In addition, since the slit pairs 22 and 26 larger than the single opening are regularly arranged side by side, it can be easily recognized as a geometric pattern even at a distance, and coupled with the effect of reducing the opening area of the substrate 14, the design characteristics It can also contribute to improvement.

また、前記スリット列23,27が、前記スリット対22,26を前記列方向で等間隔に複数並べて形成され、前記並び方向で隣り合う前記スリット列23,27が、前記列方向で相互に前記等間隔の半ピッチ分ずれて配置されることで、スリット対22,26が千鳥状に配置されることとなり、スリット形成領域15をより変形し易くすることができる。   The slit rows 23 and 27 are formed by arranging a plurality of the slit pairs 22 and 26 at equal intervals in the row direction, and the slit rows 23 and 27 adjacent in the row direction are mutually connected in the row direction. Since the slit pairs 22 and 26 are arranged in a staggered manner by being shifted by an equal interval half pitch, the slit forming region 15 can be more easily deformed.

また、前記スリット形成領域15が、前記並び方向でスリット対の外側に凸となるように湾曲又は屈曲した外凸開口部21により形成される外凸スリット対22を有することで、外凸スリット対22内側の基板残存部22aの両端が幅狭となり、基板残存部22aによる柔軟な荷重支持力を得ることができる。
また、一対の外凸開口部21の間の基板残存部22aに、内側開口部22bがさらに形成されることで、外凸スリット対22内側の基板残存部22a自体を撓み易くし、基板残存部22aによるより柔軟な荷重支持力を得ることができる。
In addition, the slit forming region 15 includes an outer convex slit pair 22 formed by an outer convex opening portion 21 that is curved or bent so as to be convex to the outside of the slit pair in the arrangement direction. The both ends of the substrate remaining portion 22a on the inner side of the substrate 22 become narrower, and a flexible load supporting force by the substrate remaining portion 22a can be obtained.
Further, the inner opening 22b is further formed in the remaining substrate portion 22a between the pair of outer convex openings 21, thereby making it easier to bend the remaining substrate portion 22a itself inside the outer convex slit pair 22, and the remaining substrate portion. More flexible load bearing force by 22a can be obtained.

また、前記スリット形成領域15が、前記並び方向でスリット対の内側に凸となるように湾曲又は屈曲した内凸開口部25により形成される内凸スリット対26を有することで、内凸スリット対26内側の基板残存部26aの中間が幅狭となり、基板残存部26a自体を撓み易くして柔軟な荷重支持力を得ることができる。
また、前記列方向で隣り合う内凸スリット対26の間に、端部開口部26bがさらに形成されることで、内凸スリット対26内側の基板残存部26aの端部を撓み易くし、基板残存部26aによるより柔軟な荷重支持力を得ることができる。
Further, the slit forming region 15 has an inwardly convex slit pair 26 formed by an inwardly convex opening 25 that is curved or bent so as to be convex inwardly of the slit pair in the arrangement direction. 26, the middle of the substrate remaining portion 26a on the inner side becomes narrow, and the substrate remaining portion 26a itself can be easily bent to obtain a flexible load supporting force.
Further, an end opening 26b is further formed between the inner convex slit pairs 26 adjacent in the column direction, so that the end of the substrate remaining portion 26a inside the inner convex slit pair 26 can be easily bent. A more flexible load supporting force can be obtained by the remaining portion 26a.

そして、本実施形態の椅子1は、脚体と、前記脚体に支持される座体4及び背凭れ10と、を備え、前記背凭れ10が、上記椅子用基板構造を具備した基板14を有し、前記基板14が、前記背凭れ10の腰部支持部11aの上方から下方に亘って前記スリット形成領域15を形成し、前記スリット形成領域15における前記腰部支持部11aよりも下方の部位が、前記開口部21,25を前記列方向で分割して分割開口部31,35とした小スリット形成領域15bとされる。   And the chair 1 of this embodiment is provided with the leg body, the seat 4 and the backrest 10 supported by the said leg body, and the said backrest 10 comprises the board | substrate 14 which comprised the said board | substrate structure for chairs. And the substrate 14 forms the slit forming region 15 from the upper side to the lower side of the waist support portion 11a of the backrest 10, and a portion below the waist support portion 11a in the slit formation region 15 is formed. The opening portions 21 and 25 are divided in the column direction to form small slit forming regions 15b which are divided opening portions 31 and 35.

この構成によれば、上記した種々の作用効果を奏する背凭れ10を構成することができる。
特に、小スリット形成領域15bでは、スリット対22,26が開口部21,25の形状に沿う複数の分割開口部31,35に分割されるので、開口部の大きさが小さくなって基板14の開口面積を抑え、かつ分割された分割開口部31,35間にも分割間残存部31a,35aが残って基板14の剛性を高める。
すなわち、背凭れ10における腰部支持部11aよりも下方では、小スリット形成領域15bにより基板14の剛性を高め、着座者の腰部を良好に支持することができる。また、スリット形成領域15全体で同様なパターンの模様を形成でき、デザイン性の向上にも寄与することができる。
According to this configuration, it is possible to configure the backrest 10 that exhibits the various effects described above.
In particular, in the small slit forming region 15b, the slit pair 22, 26 is divided into a plurality of divided openings 31, 35 along the shape of the openings 21, 25. The opening area is reduced, and the inter-division remaining portions 31a and 35a remain between the divided divided openings 31 and 35, and the rigidity of the substrate 14 is increased.
That is, below the waist support part 11a in the backrest 10, the rigidity of the substrate 14 can be increased by the small slit forming region 15b, and the seated person's waist part can be favorably supported. Moreover, the same pattern can be formed in the entire slit forming region 15, which can contribute to improvement in design.

なお、本発明は上記実施形態に限られるものではなく、例えば、単に一方向に延びる直線状の開口部でスリット対を形成してもよい。また、一箇所の湾曲又は屈曲ではなく、二箇所以上の湾曲及び屈曲等で形成された開口部でスリット対を形成してもよい。   In addition, this invention is not restricted to the said embodiment, For example, you may form a slit pair only by the linear opening part extended in one direction. Moreover, you may form a slit pair by the opening part formed by the curve and bending | flexion of two or more places instead of one curve or bending | flexion.

図5は、例えば凹凸三箇所の湾曲部を有する波形状の開口部によりスリット対を形成した例を示す。開口部は、上下端部が並び方向内側を指向した内向き開口部121により形成される内向きスリット対122と、上下端部が並び方向外側を指向した外向き開口部125により形成される外向きスリット対126と、に分けられる。内向きスリット対122は上下方向に複数並んで内向きスリット列123を形成し、外向きスリット対126は上下方向に複数並んで外向きスリット列127を形成する。各スリット列123,127は交互に並び、かつ互いに半ピッチ分ずれて配置される。各スリット列及び隣り合うスリット列の間には、上下に長い楕円形状の小開口部128が適宜形成される。
この例でも、各スリット対122,126が左右方向に良好に広がるとともに、開口部間の基板残存部によって各スリット対122,126の過度な広がりが抑制され、適度な剛性と良好な座り心地を実現できる。
FIG. 5 shows an example in which a slit pair is formed by a wave-shaped opening having, for example, three concave and convex curved portions. The opening is formed by an inward slit pair 122 formed by an inward opening 121 whose upper and lower ends are directed inward in the arrangement direction, and an outer opening 125 formed by the upper and lower ends directed in the arrangement direction outside. The orientation slit pair 126 is divided. A plurality of inward slit pairs 122 are arranged in the vertical direction to form inward slit rows 123, and a plurality of outward slit pairs 126 are arranged in the vertical direction to form outward slit rows 127. The slit rows 123 and 127 are alternately arranged and are shifted from each other by a half pitch. Between each slit row and adjacent slit rows, an elliptical small opening 128 that is vertically long is appropriately formed.
Also in this example, each pair of slits 122, 126 spreads well in the left-right direction, and excessive spread of each pair of slits 122, 126 is suppressed by the remaining substrate portion between the openings, so that moderate rigidity and good sitting comfort are achieved. realizable.

図6は、例えば一対の開口部221の上下間の所定範囲を一体化して合流部222aとしたスリット対222の例を示す。スリット対222は上下方向に複数並んでスリット列223を形成する。スリット列223は上下に半ピッチ分ずれながら複数並んで配置される。スリット対222における各開口部221の上下端側は互いに分岐し、例えば上下端部が上下方向を指向するように湾曲してU字形状を形成する。なお、当該部位の形状は、上下端部が分岐したV字形状等であってもよい。上下に並ぶスリット対222間に残るスリット対間残存部223aは、スリット列間残存部224に支持される。スリット対間残存部223aの中央には、上下に長い楕円形状の小開口部223bが形成される。
この例では、合流部222aも左右方向に広がることで、スリット対222がより広がり易くすることができる。
FIG. 6 shows an example of the slit pair 222 that integrates a predetermined range between the upper and lower sides of a pair of opening portions 221 to form a joining portion 222a. A plurality of slit pairs 222 are arranged in the vertical direction to form a slit row 223. A plurality of slit rows 223 are arranged side by side while being shifted by a half pitch up and down. The upper and lower ends of each opening 221 in the slit pair 222 are branched from each other, for example, curved so that the upper and lower ends are directed in the vertical direction to form a U shape. In addition, the shape of the said part may be V shape etc. which the upper-lower-end part branched. The remaining portion 223a between the slit pairs remaining between the vertically aligned slit pairs 222 is supported by the remaining portion 224 between the slit rows. An elliptical small opening 223b that is long in the vertical direction is formed at the center of the slit pair remaining portion 223a.
In this example, the joining part 222a also spreads in the left-right direction, so that the slit pair 222 can be more easily spread.

ここで、上記椅子用基板構造を適用する荷重支持部材は、座体4及び背凭れ10の他、ランバーサポートやヘッドレスト等であってもよい。荷重支持部材は、基板にクッション材及び表皮等を設けた構成でもよい。すなわち、上記実施形態の如く基板が荷重支持部材の全部を構成するものではなく、基板が荷重支持部材の一部を構成するものであってもよい。
そして、上記した構成は本発明の一例であり、当該発明の要旨を逸脱しない範囲で種々の変更が可能である。
Here, the load support member to which the chair substrate structure is applied may be a lumbar support, a headrest, or the like in addition to the seat body 4 and the backrest 10. The load support member may have a configuration in which a cushion material and a skin are provided on the substrate. That is, the substrate may not constitute the entire load support member as in the above embodiment, but the substrate may constitute a part of the load support member.
The above-described configuration is an example of the present invention, and various modifications can be made without departing from the gist of the invention.

1 椅子
4 座体
10 背凭れ
11a 腰部支持部
14 基板
15 スリット形成領域
15b 小スリット形成領域(分割スリット形成領域)
21 外凸開口部(開口部)
22 外凸スリット対(スリット対)
22a,26a 基板残存部
22b 内側開口部
23 外凸スリット列(スリット列)
25 内凸開口部(開口部)
26 内凸スリット対(スリット対)
26b 端部開口部
27 内凸スリット列(スリット列)
31,35 分割開口部
DESCRIPTION OF SYMBOLS 1 Chair 4 Seat 10 Backrest 11a Lumbar support part 14 Substrate 15 Slit formation area 15b Small slit formation area (divided slit formation area)
21 Outer convex opening (opening)
22 Outer convex slit pair (slit pair)
22a, 26a Substrate remaining part 22b Inner opening 23 Outer convex slit row (slit row)
25 Inward convex opening (opening)
26 Inward convex slit pair (slit pair)
26b End opening 27 Inner convex slit row (slit row)
31, 35 split opening

Claims (7)

椅子の荷重支持部材に採用される椅子用基板構造において、
前記荷重支持部材を構成する基板が、複数のスリット対を具備するスリット形成領域を備え、
前記スリット対は、互いに並列に並ぶ一対のスリット状の開口部と、前記一対の開口部に挟まれる基板残存部と、を有し、このスリット対が、前記開口部の並び方向と直交する列方向に複数並んでスリット列を形成し、
前記スリット形成領域は、前記スリット列を前記並び方向に複数並べて形成され、
前記並び方向で隣り合う前記スリット列は、前記列方向で相互にずれて配置されることを特徴とする椅子用基板構造。
In the board structure for a chair adopted as a load supporting member of the chair,
The substrate constituting the load supporting member includes a slit forming region including a plurality of slit pairs,
The slit pair has a pair of slit-shaped openings arranged in parallel to each other and a substrate remaining portion sandwiched between the pair of openings, and the slit pair is a row orthogonal to the arrangement direction of the openings. A plurality of slit rows are formed side by side in the direction,
The slit formation region is formed by arranging a plurality of the slit rows in the alignment direction,
The board structure for a chair according to claim 1, wherein the slit rows adjacent in the row direction are shifted from each other in the row direction.
前記スリット列が、前記スリット対を前記列方向で等間隔に複数並べて形成され、
前記並び方向で隣り合う前記スリット列が、前記列方向で相互に前記等間隔の半ピッチ分ずれて配置されることを特徴とする請求項1に記載の椅子用基板構造。
The slit row is formed by arranging a plurality of the slit pairs at equal intervals in the row direction,
2. The chair substrate structure according to claim 1, wherein the slit rows that are adjacent in the row direction are arranged so as to be shifted from each other in the row direction by the equally spaced half pitch.
複数の前記スリット対の少なくとも一つが、前記並び方向で当該スリット対の外側に凸となるように湾曲又は屈曲した前記開口部としての外凸開口部により形成されることを特徴とする請求項1又は2に記載の椅子用基板構造。   2. At least one of the plurality of slit pairs is formed by an outer convex opening as the opening that is curved or bent so as to be convex outward of the slit pair in the arrangement direction. Or the board | substrate structure for chairs of 2. 一対の前記外凸開口部の間の基板残存部に、内側開口部がさらに形成されることを特徴とする請求項3に記載の椅子用基板構造。   The board | substrate structure for chairs of Claim 3 with which an inner side opening part is further formed in the board | substrate residual part between a pair of said outer convex opening parts. 複数の前記スリット対の少なくとも一つが、前記並び方向で当該スリット対の内側に凸となるように湾曲又は屈曲した前記開口部としての内凸開口部により形成されることを特徴とする請求項1から4の何れか一項に記載の椅子用基板構造。   2. At least one of the plurality of slit pairs is formed by an inwardly convex opening as the opening that is curved or bent so as to protrude inward of the slit pair in the arrangement direction. The board | substrate structure for chairs as described in any one of 1-4. 前記内凸開口部により形成されて前記列方向で隣り合う前記スリット対の間に、端開口部がさらに形成されることを特徴とする請求項5に記載の椅子用基板構造。   The board structure for a chair according to claim 5, wherein an end opening is further formed between the pair of slits formed by the inwardly convex openings and adjacent in the row direction. 脚体と、前記脚体に支持される座体及び背凭れと、を備える椅子において、
前記背凭れが、請求項1から6の何れか一項に記載の椅子用基板構造を具備した基板を有し、
前記基板が、前記背凭れの腰部支持部の上方から下方に亘ってスリット形成領域を形成し、
前記スリット形成領域における前記腰部支持部よりも下方の部位が、前記開口部を前記列方向で分割して分割開口部とした分割スリット形成領域とされることを特徴とする椅子。
In a chair comprising a leg, and a seat and a backrest supported by the leg,
The backrest has a board comprising the chair board structure according to any one of claims 1 to 6,
The substrate forms a slit formation region from above to below the back support portion of the backrest,
The chair, wherein a portion of the slit forming area below the waist support part is a divided slit forming area obtained by dividing the opening in the row direction to form a divided opening.
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