JP2005160558A - Chair, its seat plate, and back plate - Google Patents

Chair, its seat plate, and back plate Download PDF

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Publication number
JP2005160558A
JP2005160558A JP2003400450A JP2003400450A JP2005160558A JP 2005160558 A JP2005160558 A JP 2005160558A JP 2003400450 A JP2003400450 A JP 2003400450A JP 2003400450 A JP2003400450 A JP 2003400450A JP 2005160558 A JP2005160558 A JP 2005160558A
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pressure receiving
receiving portion
pressure
seated person
chair
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JP4238122B2 (en
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Katsunori Hama
克典 濱
Hiroichi Matsumoto
博一 松本
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Itoki Crebio Corp
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Itoki Crebio Corp
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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat plate made of a synthetic resin, and a back plate by which a high fittedness can be obtained without applying a cushioning material. <P>SOLUTION: For example, the seat plate 1 comprises a loop-like frame section 2, and a pressure receiving section 3 which expands in the frame section 2, both are integrally molded of a synthetic resin. The pressure receiving section 3 has a net-like structure representing crossing groups of a large number of linear bodies 4 and 5. Therefore, the pressure receiving section 3 warps and is deformed just like sinking by the body pressure of a sitter. Since the pressure receiving section 3 has the net-like structure, the shape or the strength of the surface can precisely be changed with a place. Therefore, a high fittedness and cushioning property can be obtained without applying the cushioning material. As a result, the manufacturing cost and the discarding cost can be suppressed while being a chair of a good sitting feeling. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本願発明は、椅子及びその座板並びに背板に関するものである。   The present invention relates to a chair, its seat plate and back plate.

椅子の座や背もたれは様々の構造のものがある。例えば事務用の椅子で最も多く採用されているのは、合成樹脂製の座板及び背板にクッション材を張った構造である。また、クッション材を張らずに、合成樹脂製の座板及び背板を露出させたタイプもある。更に、ループ状のフレームにネットを張った構造もある。   Chair seats and backrests come in various structures. For example, the most frequently used office chair is a structure in which a cushioning material is stretched on a seat plate and a back plate made of synthetic resin. There is also a type in which a seat plate and a back plate made of synthetic resin are exposed without stretching a cushion material. Further, there is a structure in which a net is stretched on a loop-shaped frame.

座板や背板にクッション材を張っているのはクッション性を確保するためであるが、クッション材は使用しているうちに潰れ変形して弾性が低下するため、クッション材のみで十分なフィット性を得ることは難しい。また、クッション材を張るとそれだけコストが嵩むと共に、椅子を廃棄した後の処理コストや環境負荷の問題もある。   The cushioning material is stretched on the seat and back plate to ensure cushioning, but the cushioning material is crushed and deformed while using it, and its elasticity decreases, so the cushioning material alone provides a sufficient fit. It is difficult to get sex. In addition, if the cushioning material is stretched, the cost increases accordingly, and there is a problem of processing cost and environmental load after the chair is discarded.

また、フレームにネットを張った構造のものは、着座者へのフィット性及び通気性に優れている利点を有するが、フレームにネットを固定するために多大の手間が掛かるのみならず、フレームとネットとは別素材であるため廃棄した後の処理の問題は依然として残っている。   In addition, the structure in which the net is stretched on the frame has the advantage of excellent fit and breathability for the seated person, but not only does it take a lot of trouble to fix the net to the frame, Since it is a different material from the net, the problem of disposal after disposal still remains.

他方、座や背もたれを座板及び背板のみで構成したタイプでは、製造コスト及び廃棄処理コストを抑制できると共に環境負荷も小さいという利点を有するが、クッション性は殆どないため座板り心地は悪く、このため一般化するには至っていないのが実情である。   On the other hand, the type in which the seat and the backrest are composed only of the seat plate and the back plate have the advantages that the manufacturing cost and the disposal cost can be suppressed and the environmental load is small, but the cushioning property is hardly present, so the seating comfort is poor. For this reason, the situation has not been generalized.

本願発明は、このような現状を改善することを課題とするものである。   This invention makes it a subject to improve such a present condition.

ところて、既述のように、座や背もたれを合成樹脂製の座板のみ又は背板のみで構成したものは、製造コスト及び廃棄処理コストを抑制できると共に環境負荷も小さいという利点があり、クッション性・フィット性の問題を解消できれば高い市場性が期待できると言える。   However, as described above, the seat and the backrest composed only of the synthetic resin seat plate or only the back plate have the advantage that the manufacturing cost and the disposal processing cost can be suppressed and the environmental load is small. It can be said that high marketability can be expected if the problem of fitness and fit can be solved.

他方、本願出願人は、特開２０００−９３２５０号公報において、合成樹脂製の座板に多数のスリット群を形成して、着座者の体圧が強く掛かる部分が大きく撓み変形するように構成した椅子を開示しており、この座板を備えた椅子は座り心地に優れていて市場で高い評価を受けている。   On the other hand, the applicant of the present invention disclosed in Japanese Patent Application Laid-Open No. 2000-93250, in which a large number of slit groups were formed on a synthetic resin seat plate so that a portion where the body pressure of the seated person was strongly applied was greatly bent and deformed. The chair is disclosed, and the chair provided with the seat plate is excellent in the comfort of sitting and has been highly evaluated in the market.

本願発明者たちは、このような知見を基にして研究を重ねることによって本願発明を完成させるに至った。   The inventors of the present application have completed the present invention by repeating research based on such knowledge.

すなわち請求項１の発明は、着座者の体圧が掛かる受圧部とその周囲を囲うように延びるフレーム部とを合成樹脂によって一体成形しており、前記受圧部を、着座者の体圧によって撓み変形する柔軟構造としている。   That is, in the invention of claim 1, the pressure receiving portion to which the body pressure of the seated person is applied and the frame portion extending so as to surround the periphery thereof are integrally formed of synthetic resin, and the pressure receiving portion is bent by the body pressure of the seated person. It has a flexible structure that deforms.

請求項２の発明に係る座板又は背板は、合成樹脂製であって着座者の体圧が掛かる受圧部を、着座者の体圧によって撓み変形し得る柔軟構造と成しており、かつ、受圧部において着座者の体圧が作用する加圧面を、着座者の身体にフィットし得る立体形状に形成しており、更に、受圧部は、着座者への突き上げ感を無くした又は軽減した状態に撓み変形するように場所によって弾性強度を異ならせている。   The seat plate or the back plate according to the invention of claim 2 is made of a synthetic resin and has a flexible structure in which the pressure receiving portion to which the body pressure of the seated person is applied can be bent and deformed by the body pressure of the seated person, and In addition, the pressure surface on which the body pressure of the seated person acts is formed in a three-dimensional shape that can fit the body of the seated person, and the pressure receiving part eliminates or reduces the feeling of pushing up to the seated person. The elastic strength is varied depending on the location so as to be bent and deformed in the state.

請求項３の発明では、前記受圧部を、細長く延びる条体の多数本が交叉した網状構造と成すことにより、容易に撓み変形することと、場所によって弾性強度を変えることと、受圧面を立体形状にすることとが容易ならしめられている。   According to a third aspect of the present invention, the pressure receiving portion is formed into a network structure in which a large number of elongated strips intersect each other, thereby being easily bent and deformed, changing the elastic strength depending on the location, Easy to shape.

更に、受圧部を網状の構造とするにおいて、請求項４の発明では、前記受圧部は、ジグザグ状や波形のように非直線状に延びる縦条体と横条体との群を交叉させることによって網状構造になっている。   Furthermore, in the invention according to claim 4, wherein the pressure receiving portion has a net-like structure, the pressure receiving portion intersects a group of vertical stripes and horizontal stripes extending non-linearly like a zigzag shape or a waveform. It has a network structure.

本願発明は、請求項４に記載したように、請求項１〜請求項４のうちの何れに記載した座板又は背板を備えた椅子も含んでいる。なお、合成樹脂の素材としては、価格や強度、或いはリサイクルの容易性の点からポリプロピレン樹脂が好ましい（もちろん、ＦＲＰ等の他の樹脂を使用しても良い）。   As described in claim 4, the present invention also includes a chair provided with the seat plate or the back plate described in any of claims 1 to 4. In addition, as a raw material of a synthetic resin, a polypropylene resin is preferable from the point of price, intensity | strength, or the ease of recycling (of course, other resin, such as FRP, may be used).

請求項１の発明では、合成樹脂製の受圧部が高い柔軟性を備えているため、クッション材を張らなくとも十分なクッション性・フィット性を確保することができる。このため、製造コスト及び廃棄処理コストを抑制できると共に環境負荷の小さい椅子を提供することが可能となる。   In the first aspect of the invention, since the pressure-receiving portion made of synthetic resin has high flexibility, sufficient cushioning and fitting properties can be secured without stretching the cushioning material. For this reason, it becomes possible to provide a chair that can suppress the manufacturing cost and the disposal cost and has a small environmental load.

請求項２のように構成すると、受圧部の受圧面（座板の場合は上面で背板の場合は前面）が着座者の身体のもともとフィットする立体形状であることと、受圧部の弾性強度を場所によって異ならせて着座者の重みで撓み変形した状態で突き上げ感じを無くすか抑制できるため、座り心地をより一層向上させることができる。   According to the second aspect, the pressure receiving surface of the pressure receiving portion (the upper surface in the case of the seat plate and the front surface in the case of the back plate) has a three-dimensional shape that fits the body of the seated person, and the elastic strength of the pressure receiving portion. Since the push-up feeling can be eliminated or suppressed in a state where the height is changed depending on the place and is bent and deformed by the weight of the seated person, the sitting comfort can be further improved.

請求項３及び請求項４のように受圧部を網状構造にすると、受圧面を立体構造に形成することは射出成形法や反応成形法によって簡単に実現することができ、また、網目の密度を変えたり断面積を変えたりすることにより、弾性力を場所によって異なるせることも簡単に実現できる。換言すると、受圧部を網目状構造にすると、受圧部の各部位においてその断面形状や弾性強度を自在に設定できるため、着座者の身体のプロフィールに応じた表面形状にすることと、着座者の体圧分布に応じた強度分布とにすることとを容易に実現できるのである。   When the pressure receiving portion has a network structure as in claim 3 and claim 4, forming the pressure receiving surface in a three-dimensional structure can be easily realized by an injection molding method or a reaction molding method. By changing or changing the cross-sectional area, the elastic force can be easily changed depending on the location. In other words, if the pressure receiving portion has a mesh structure, the cross-sectional shape and the elastic strength can be freely set at each part of the pressure receiving portion. It is possible to easily realize the intensity distribution according to the body pressure distribution.

更に、従来のネット椅子ではネットは縦糸と横糸とが交叉した単純なパターンしか形成できなかったが、本願発明では様々の網目状パターンを形成できるため、デザインの自由性が格段に高くなるという利点もある。また、通気性に優れている利点もある。   Furthermore, in the conventional net chair, the net could only form a simple pattern in which warp and weft crossed, but in the present invention, various net-like patterns can be formed, so that the design freedom is greatly increased. There is also. In addition, there is an advantage of excellent breathability.

次に、本願発明の実施形態を図面に基づいて説明する。   Next, an embodiment of the present invention will be described with reference to the drawings.

(1).第１実施形態（図１〜図４）
図１〜図４では第１実施形態を示している。本実施形態は座板（座シェル）１に適用したもので、図１は簡略表示した平面図、図２は図１の部分拡図、図３は図１の III-III視概略断面図、図４は図１のIV−IV視概略断面図である。 (1). First embodiment (FIGS. 1 to 4)
1 to 4 show the first embodiment. This embodiment is applied to a seat plate (seat shell) 1. FIG. 1 is a simplified plan view, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a schematic sectional view taken along line III-III of FIG. 4 is a schematic sectional view taken along line IV-IV in FIG.

座板１は合成樹脂を素材とした射出成形（反応成形でも良い）で製造されており、外周部を構成する閉ループ状のフレーム部２と、フレーム部２の内側に広がる受圧部３とからなっており、フレーム部２と受圧部（座面部）３とは一体成形されている。フレーム部２は着座者の体圧によっては撓み変形しない剛体構造であり、図示しない座受け部材にねじ止め等の適宜手段で取り付けられている。   The seat plate 1 is manufactured by injection molding (or reaction molding) using a synthetic resin as a raw material, and includes a closed-loop frame portion 2 constituting an outer peripheral portion and a pressure receiving portion 3 extending inside the frame portion 2. The frame portion 2 and the pressure receiving portion (seat surface portion) 3 are integrally formed. The frame portion 2 has a rigid structure that does not bend and deform depending on the body pressure of the seated person, and is attached to a seat receiving member (not shown) by appropriate means such as screwing.

受圧部３は、前後方向に延びる縦条体４の群と左右方向に延びる横条体５の群とを交叉させて成り、多数の網目を有する網状（ネット状）の外観を呈している。各条体４，５の厚さや交叉ピッチは、人が着座したときに受圧部３の全体として違和感を与えない程度の面積が確保できるように設定したら良い。   The pressure receiving portion 3 is formed by crossing a group of vertical strips 4 extending in the front-rear direction and a group of horizontal strips 5 extending in the left-right direction, and has a net-like appearance having a number of meshes. The thickness and the crossing pitch of the strips 4 and 5 may be set so as to ensure an area that does not give a sense of incongruity as a whole of the pressure receiving portion 3 when a person is seated.

図２から理解できるように、縦条体４は波打った状態で前後方向に延びており、横条体５は波打った状態で左右方向に延びている。このため各条体４，５はその長手方向に延び変形することが可能であり、この延び変形により、着座者の体圧が掛かると受圧部３は下向きに沈み込むように弾性変形する。   As can be understood from FIG. 2, the vertical stripe 4 extends in the front-rear direction in a wavy state, and the horizontal stripe 5 extends in the left-right direction in a wavy state. Therefore, the strips 4 and 5 can be extended and deformed in the longitudinal direction thereof, and by this extension and deformation, when the body pressure of the seated person is applied, the pressure receiving portion 3 is elastically deformed so as to sink downward.

そして、図３及び図４に示すように、各条体４，５は、着座者の体圧が強くかかる部分（臀部が当たる部分）は薄肉となるように厚さ（上下方向の肉厚）を変化させることにより、着座者の体圧が強くかかる部分ほど大きく撓み変形（しなり変形）するように、弾性強度（弾性率又は硬さと言ってもよい）を場所によって細かく異ならせている（なお、図３では縦条体４は表示しておらず、図４では横条体５は表示していない）。   As shown in FIGS. 3 and 4, the strips 4 and 5 are thick so that the part to which the body pressure of the seated person is strongly applied (the part where the buttocks hit) is thin (the thickness in the vertical direction). The elastic strength (which may be referred to as the elastic modulus or hardness) is made to vary finely depending on the location so that the portion to which the body pressure of the seated person is more strongly bent and deformed (smoothly deformed) by changing In addition, the vertical stripe 4 is not displayed in FIG. 3, and the horizontal stripe 5 is not displayed in FIG.

このため、受圧部３は着座者の身体に倣うように撓み変形して、着座者が部分的に突き上げ感を受けることを防止でき、その結果、クッション材を張らなくても高いクッション性・フィット性を得ることができる。また、フレーム部２と受圧部３とは一体成形されているため、製造コスト及び組立コストを抑制できる共に、廃棄後の処理やリサイクルに要する手間とコストを抑制できる。   For this reason, the pressure receiving part 3 can be bent and deformed so as to follow the body of the seated person, so that the seated person can be prevented from being partially pushed up. Sex can be obtained. Moreover, since the frame part 2 and the pressure receiving part 3 are integrally formed, the manufacturing cost and the assembling cost can be suppressed, and the labor and cost required for the processing and recycling after disposal can be suppressed.

着座者の体圧が強くかかる部分ほど大きく沈み込み変形するように受圧部３の弾性率を変える方法としては、実施形態のように条体４，５の上下肉厚を変えることに代えて（又はこれに加えて）、各条体４，５の水平方向の厚さ寸法を変えることや、縦横の条体４，５の交叉ピッチ（換言すると網目のピッチ）を変えることを採用することも可能である。各条体４，５はジグザグ状に延びる形態にするなどしても良い。受圧部３の上面を、着座者の臀部や大腿部を包み込むような立体形状に形成することも可能である（この点は他の実施形態で後述する）。   As a method of changing the elastic modulus of the pressure-receiving portion 3 so that the portion to which the body pressure of the seated person is stronger sinks and deforms, instead of changing the upper and lower wall thickness of the strips 4 and 5 as in the embodiment ( (Or in addition to this) It is also possible to change the horizontal thickness dimension of each strip 4, 5 or to change the crossing pitch (in other words, the mesh pitch) of the vertical strip 4, 5 Is possible. The strips 4 and 5 may be formed in a zigzag shape. It is also possible to form the upper surface of the pressure-receiving portion 3 in a three-dimensional shape that wraps around the seated person's buttocks and thighs (this point will be described later in another embodiment).

(2).第２実施形態（図５）
ところで、射出成形法によって座板１を成形するにおいて、受圧部３が網状であると受圧部３を成形するにおいて、金型内のキャビティに樹脂が流れにくいという問題がある。 (2). Second embodiment (FIG. 5)
By the way, when the seat plate 1 is molded by the injection molding method, if the pressure receiving portion 3 has a net shape, there is a problem that the resin hardly flows into the cavity in the mold when the pressure receiving portion 3 is molded.

この点への対策として、図５に示す第２実施形態では、受圧部３の中央部にゲートが来るように金型を設定した場合において、ゲートから放射方向に延びてフレーム部用キャビティに連通するランナーを設けて、ランナーからも樹脂が網目状のキャビティに流れるように設定してい。このため、成形された後の受圧部３には、ゲート後部６とランナー後部７とが残っており、条体４，５はランナー後部７にも接続されている。   As a countermeasure against this point, in the second embodiment shown in FIG. 5, when the mold is set so that the gate comes to the center of the pressure receiving portion 3, it extends in the radial direction from the gate and communicates with the cavity for the frame portion. The runner is set so that the resin flows from the runner to the mesh-shaped cavity. For this reason, the gate receiving portion 6 and the runner rear portion 7 remain in the pressure receiving portion 3 after being formed, and the strips 4 and 5 are also connected to the runner rear portion 7.

斜め方向に延びるランナー後部７は途中で屈曲するように非直線状に形成しており、このため受圧部３の撓み変形が阻害されることはない。むしろ、受圧部３の弾性率を場所によって異ならせる異硬度手段にランナー後部７を利用することにより、より高いフィット性を得ることが可能となる。なお、金型内のキャビティに複数のゲートから樹脂を注入しても良いことはいうまでもない。   The runner rear portion 7 extending in the oblique direction is formed in a non-linear shape so as to be bent in the middle, so that the deformation deformation of the pressure receiving portion 3 is not hindered. Rather, it is possible to obtain higher fit by using the runner rear portion 7 as a different hardness means that varies the elastic modulus of the pressure receiving portion 3 depending on the location. Needless to say, resin may be injected into the cavity in the mold from a plurality of gates.

(3).第３実施形態（図６）
図６では第３実施形態を示している。この実施形態では、座板１において、受圧部３のうち着座者の体圧が強く掛かる後半部を、放射状条体８とこれに交叉する環状条体９とで構成し、かつ、クモの巣の中心になる部分にはセンター筒体１９を、クモの巣の周縁になる部分にはエンド筒体１１を形成して、筒体１０，１１に条体８，９を接続している。各条体４，５，８，９は直線に描いているが、実際には、長手方向に延び変形するように波形やジグザグ状に形成するのが好ましい。 (3) Third embodiment (FIG. 6)
FIG. 6 shows a third embodiment. In this embodiment, in the seat plate 1, the latter half of the pressure receiving portion 3 where the body pressure of the seated person is strongly applied is composed of the radial strips 8 and the annular strips 9 crossing the radial strips 8, and the center of the spider web The center cylinder 19 is formed in the part to be formed, and the end cylinder 11 is formed in the part to be the periphery of the spider web, and the strips 8 and 9 are connected to the cylinders 10 and 11. Each strip 4, 5, 8, 9 is drawn in a straight line, but in practice, it is preferably formed in a wavy or zigzag shape so as to extend and deform in the longitudinal direction.

図面では表示していないが、エンド筒体１１を繋ぐ線よりも外側の部分は縦条体４と横条体５とから成る波目状構造にしている。もちろん、受圧部３の後半部の全体を放射状条体８と環状条体９とからなるクモの巣状の構造にしたり、受圧部３の全体をクモの巣状の構造にしたりすることも可能であり、このように条体群からなるパターンを自由に設定できるのが本願発明の特徴の一つである。   Although not shown in the drawing, the portion outside the line connecting the end cylinders 11 has a wave-like structure composed of the vertical stripes 4 and the horizontal stripes 5. Of course, it is possible to make the entire rear half of the pressure receiving part 3 into a cobweb-like structure composed of the radial stripes 8 and the annular stripes 9, or to make the whole pressure receiving part 3 into a cobweb-like structure. As described above, it is one of the features of the present invention that a pattern composed of strips can be freely set.

この実施形態では、網目の密度や各条体４，５，８，９の断面形状、或いは受圧部３の上面の形状等を場所によってきめ細かく異ならせることが極めて容易であり、このため、長時間使用しても着座者が疲れや痛みを感じない快適な座り心地の椅子をなし得る。   In this embodiment, it is very easy to finely vary the density of the mesh, the cross-sectional shape of each strip 4, 5, 8, 9 or the shape of the upper surface of the pressure receiving portion 3 depending on the location. Even if it is used, the seated person does not feel tired or in pain, and a comfortable sitting chair can be formed.

(4).第４実施形態（図７）
図７に示すのは第４実施形態に係る座板１の部分的な正断面図である。この実施形態では、人が着座した状態で臀部１２が正面視で２山状のプロフィールを成していることから、受圧部３の上面（受圧面）を、人の臀部１２の形状に合わせて凹み１３が左右に振り分けて形成された立体形状に形成している。このため、高いフィット性を得ることができる。なお、凹み１３は側断面視においても存在している。 (4). Fourth embodiment (FIG. 7)
FIG. 7 is a partial front sectional view of the seat plate 1 according to the fourth embodiment. In this embodiment, since the buttocks 12 form a two-mountain profile in a front view while a person is seated, the upper surface (pressure receiving surface) of the pressure receiving part 3 is matched with the shape of the person's buttocks 12. The dents 13 are formed in a three-dimensional shape formed by sorting left and right. For this reason, high fitting property can be obtained. The recess 13 is also present in a side sectional view.

なお、この図７に二点鎖線で示すように、座受け部に、受圧部３が過度に沈み込み変形することを阻止するストッパー手段１４を設けても良い（この点は他の実施形態も同じである）。このようにストッパー手段１４を設けると、過大な圧力が掛かっても受圧部３が破断したり塑性変形したりすることはない。   As shown by a two-dot chain line in FIG. 7, the seat receiving portion may be provided with stopper means 14 for preventing the pressure receiving portion 3 from sinking and deforming excessively (this point is also applicable to other embodiments). The same). When the stopper means 14 is provided in this manner, the pressure receiving portion 3 is not broken or plastically deformed even if an excessive pressure is applied.

(5).第５実施形態（図８〜図９）
図８及び図９では第５実施形態を示している。図８は概略平面図、図９は図８のIX−IX視線での概略断面図である。 (5). Fifth embodiment (FIGS. 8 to 9)
8 and 9 show a fifth embodiment. 8 is a schematic plan view, and FIG. 9 is a schematic sectional view taken along line IX-IX in FIG.

ところで、椅子の座り心地には様々の要因が作用している。座との関係で座り心地を考察すると、身体の特定の部位への突き上げ感が生じないことと、適度の反力（クッション作用）があることが重要であると言える。更に身体の突き上げ感は身体の神経密度や脂肪の量とも密接に関連しており、臀部は外からの刺激（この場合は圧迫）に対して鈍感であるのに対して、大腿部は外からの刺激には敏感であると言える。また、臀部においても座骨の箇所では肉が圧迫を受けるため、他の部位よりも刺激には弱い（すなわち、圧迫感を受け易い）と言える。   By the way, various factors act on the comfort of the chair. Considering the sitting comfort in relation to the seat, it can be said that it is important that there is no feeling of pushing up to a specific part of the body and that there is an appropriate reaction force (cushion action). Furthermore, the sense of pushing up the body is closely related to the nerve density and fat content of the body, while the buttocks are insensitive to external stimuli (in this case, compression), while the thighs are outside. It can be said that it is sensitive to the stimulus from Also, in the buttocks, meat is pressed at the place of the sciatic bone, so it can be said that it is weaker to irritation than other parts (that is, it is easy to receive a feeling of pressure).

従って、座板１を設計するにおいては、人が着座したときに身体のどの部分でどのように負担を分散させるかということが重要である。逆にいうと、着座者の体圧を受圧部３にどのように分散させるかということが重要である。最適の体圧分布を詳細に解明するには至っていないが、座り心地の良い座板の条件としては、一般的には、臀部は全体を受圧部３で包み込むようにして支持すること、座骨の箇所ではできるだけ加圧を少なくすること、座板の前部による大腿部の突き上げ感は可能な限りなくすべきであること、といったことが挙げられる。   Therefore, in designing the seat plate 1, it is important how to distribute the burden in which part of the body when a person is seated. In other words, it is important how the body pressure of the seated person is dispersed in the pressure receiving portion 3. The optimal body pressure distribution has not yet been elucidated in detail, but as a condition of a comfortable seat plate, in general, the buttocks support the whole body in a pressure receiving part 3, For example, the pressure should be reduced as much as possible, and the thigh push-up feeling by the front part of the seat plate should be eliminated as much as possible.

そして、好ましい体圧分布の座板１を得るためには、着座する前の状態での受圧部３の上面の形状と、着座した後の受圧部３の弾性強度分布とが密接に関連していると言える。蓋し、受圧部３の上面の形状はフィット性に密接に関連しており、また、弾性強度分布はクッション性に密接に関連しているからである。   And in order to obtain the seat plate 1 of preferable body pressure distribution, the shape of the upper surface of the pressure receiving part 3 in the state before sitting and the elastic strength distribution of the pressure receiving part 3 after sitting are closely related. I can say that. This is because the shape of the upper surface of the pressure receiving portion 3 is closely related to the fit property, and the elastic strength distribution is closely related to the cushion property.

このような知見に基づき、第５実施形態では、先ず、受圧部３の上面を、人の臀部に対応した凹み１３がある形状とし、かつ、座板１の前端部１ａは容易に撓み変形しやすい構造にしている。   Based on such knowledge, in the fifth embodiment, first, the upper surface of the pressure receiving portion 3 is shaped to have a recess 13 corresponding to a human buttocks, and the front end portion 1a of the seat plate 1 is easily bent and deformed. Easy structure.

受圧部３は、例えば第１実施形態と同様に条体群が交叉した網状構造であり、各条体は波形等であってその長手方向に延び変形し得る。図８では、網条構造を網かけ表示で簡略表示しており、網かけの密度が高いほど撓み変形（延び変形）し易いことを示している。   The pressure receiving portion 3 has, for example, a network structure in which strip groups intersect each other as in the first embodiment, and each strip has a corrugated shape and can be deformed by extending in the longitudinal direction thereof. In FIG. 8, the mesh structure is simply displayed in a shaded display, and the higher the shade density is, the easier it is to bend and deform (elongate deformation).

そして、この網掛け表示の密度から理解できるように、凹み１３のうち人の座骨が当たる部分を中心とした部分１３ａは特に撓み変形しやすい構造にし、更に、臀部が過度に沈み込み過ぎると安定性の低下や締め付け感を招来する虞があるので、凹み１３はある程度の保形性を持ちながら撓み変形が許容された弾性力とし、凹み１３の周囲が良く延びるように設定している。   As can be understood from the density of this shaded display, the portion 13a of the dent 13 centered on the portion where the human spine hits is made to be particularly flexible and deformable, and further stable if the buttocks sink too much. Therefore, the recess 13 is set to have an elastic force that is allowed to bend and deform while having a certain degree of shape retention so that the periphery of the recess 13 extends well.

このように形成することにより、受圧部３は上面の初期形状（着座前の形状）をある程度保持しつつ、着座者の体圧によって沈み込み変形することが許容されて、長時間使用しても圧迫感を受けない快適な座り心地を得ることができると期待できる。そして、受圧部３は網状構造であるため、網目の密度や断面形状・断面積等をきめ細かに変えることを極めて容易にでき、その結果、受圧部３を好適な表面形状と好適な強度分布とに容易に加工できるのである。   By forming in this way, the pressure receiving part 3 is allowed to sink and deform due to the body pressure of the seated person while maintaining the initial shape of the upper surface (the shape before sitting) to some extent, and even when used for a long time. We can expect to be able to get a comfortable sitting comfort without being overwhelmed. Since the pressure receiving portion 3 has a mesh structure, it is very easy to finely change the mesh density, cross-sectional shape, cross-sectional area, etc. As a result, the pressure receiving portion 3 has a suitable surface shape and a suitable strength distribution. Can be easily processed.

なお、この座板１の構造は一例であり、更に好適な構造が存在することを想定される。   In addition, the structure of this seat board 1 is an example, and it is assumed that a more suitable structure exists.

(6).第６実施形態（図10〜図11）
図１０及び図１１では第６実施形態を示している。図１０のうち（Ａ）は正面図、（Ｂ）は（Ａ）のＢ−Ｂ視断面図、図１１は図１０（Ａ）のXI−XI視断面図である。 (6). Sixth embodiment (FIGS. 10 to 11)
10 and 11 show a sixth embodiment. 10A is a front view, FIG. 10B is a cross-sectional view taken along the line BB of FIG. 10A, and FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG.

この実施形態では、座板１と背板１５とが一体に繋がった状板に成形した場合において、背板１５を、閉ループ状のフレーム部１６と、これを横切るように延びる複数段（３段）の仕切り体１７と、仕切り体１７で仕切られた状態に配置された受圧部１８ａ〜１８ｄとで構成している。敢えて説明するまでもないが、各受圧部１８ａ〜１８ｄはフレーム部１７，１８と一体に繋がっている。   In this embodiment, when the seat plate 1 and the back plate 15 are integrally formed into a shape plate, the back plate 15 has a closed loop frame portion 16 and a plurality of steps (three steps) extending across the frame portion 16. ) Partition body 17 and pressure receiving portions 18a to 18d arranged in a state partitioned by the partition body 17. Needless to say, each of the pressure receiving portions 18a to 18d is integrally connected to the frame portions 17 and 18.

各受圧部１８ａ〜１８ｄは網かけ模様で簡略して表示しており、斜め方向に延びる条体の群を交叉させて網状に形成している。また、各条体はその長手方向に延び変形するように波形やジグザグ状等に形成している。各受圧部３の撓み変形のし易さは網掛け表示の密度で表しており、着座者の体圧（背もたれ荷重）が最も強く作用する第３受圧部１８ｃが最も容易に撓み変形するように設定している。このため、背板も、クッション材を張ることなく高いフィット性を得ることができる。   Each of the pressure receiving portions 18a to 18d is simply indicated by a mesh pattern, and is formed in a net shape by crossing a group of strips extending in an oblique direction. Each strip is formed in a corrugated or zigzag shape so as to extend and deform in the longitudinal direction. The ease of bending deformation of each pressure receiving portion 3 is represented by the density of the shaded display so that the third pressure receiving portion 18c where the body pressure (backrest load) of the seated person acts most strongly bends and deforms most easily. It is set. For this reason, the back plate can also obtain high fit without stretching the cushion material.

なお、本実施形態のように座板１と背板１５とを一体化した場合、座板１のフレーム部２と背板１５のフレーム部１６とは全体としてループ状になっておれば足り、従って、座板１における受圧部３の後端と背板１５における受圧部１８の下端とが接続されていたり、逆に空間が空いていたりしても良い。また、フレーム部２，１６は板状でも良いのである。   When the seat plate 1 and the back plate 15 are integrated as in the present embodiment, it is sufficient that the frame portion 2 of the seat plate 1 and the frame portion 16 of the back plate 15 have a loop shape as a whole. Therefore, the rear end of the pressure receiving portion 3 in the seat plate 1 and the lower end of the pressure receiving portion 18 in the back plate 15 may be connected, or conversely, a space may be vacant. The frame portions 2 and 16 may be plate-shaped.

(7).第７実施形態（図12〜図13）
図１２〜図１３では第７実施形態を示している。これも背板１５に適用したもので、図１２は背板１５の正面図、図１３は図１２のXIII−XIII視断面図である。 (7). Seventh embodiment (FIGS. 12 to 13)
12 to 13 show a seventh embodiment. This is also applied to the back plate 15, FIG. 12 is a front view of the back plate 15, and FIG. 13 is a sectional view taken along line XIII-XIII in FIG.

この実施形態では、背板１５の受圧部１８を多数の条体の群で構成した場合において、その硬さ（弾性率）が滑らかに変化するように設定している（図１２では、網かけ表示の密度が高いほど撓み変形し易いことを示している）。   In this embodiment, when the pressure receiving portion 18 of the back plate 15 is configured by a group of a large number of strips, the hardness (elastic modulus) is set to change smoothly (in FIG. The higher the density of the display, the easier it is to bend and deform).

(8).第８実施形態（図14）
図１４に示す第８実施形態では、座板１又は背板１５において、受圧部３，１８を斜め方向に延びる条体部１９，２０の群で網目状に形成しており、このため菱形の穴２１が並んだパターンになっている。換言すると、ジグザグ状に延びる条体の群を接続した形態になっている。 (8). Eighth embodiment (Fig. 14)
In the eighth embodiment shown in FIG. 14, in the seat plate 1 or the back plate 15, the pressure receiving portions 3, 18 are formed in a mesh shape with a group of strips 19, 20 extending in an oblique direction. It is a pattern in which the holes 21 are arranged. In other words, a group of strips extending in a zigzag shape is connected.

そして、着座者の体圧が受圧部３，１８に掛かると、受圧部３，１８は図１４に矢印で示すように縦横の両方向に延び変形し、その結果、受圧部３，１８は体圧によって加圧方向に凹み変形することになる。   When the body pressure of the seated person is applied to the pressure receiving portions 3 and 18, the pressure receiving portions 3 and 18 are deformed extending in both vertical and horizontal directions as indicated by arrows in FIG. As a result, the dent is deformed in the pressurizing direction.

(9).第９実施形態（図15〜図16）
図１５〜図１６では第９実施形態を示している。図１５は平面図（正面図）、図１６は図１５の XVI-XVI視断面図である。 (9) Ninth embodiment (FIGS. 15 to 16)
15 to 16 show a ninth embodiment. 15 is a plan view (front view), and FIG. 16 is a sectional view taken along line XVI-XVI in FIG.

この実施形態では、受圧部３，１８は縦横（或いは斜め方向）に整列した配置された多数の単位板部２２と、隣合った単位板部２２を繋ぐブリッジ部２３とで構成されており、ブリッジ部２３を湾曲した断面形状とすることにより、隣合った単位板部２３の間隔が広がること（すなわち受圧部３，１８が加圧方向に凹むように撓み変形すること）を許容している。   In this embodiment, the pressure receiving portions 3 and 18 are configured by a large number of unit plate portions 22 arranged in the vertical and horizontal (or diagonal directions) and bridge portions 23 that connect the adjacent unit plate portions 22. By making the bridge portion 23 have a curved cross-sectional shape, the interval between the adjacent unit plate portions 23 is widened (that is, the pressure receiving portions 3 and 18 are bent and deformed so as to be recessed in the pressurizing direction). .

本実施形態では各ブリッジ部２３は互いに分断しているが、単位板部２２の周囲がブリッジ部２３で完全に囲われる形態と成すことも可能であり、従って、受圧部３，１８は、穴が空いていない状態で撓み変形を許容し得るのである。   In the present embodiment, the bridge portions 23 are separated from each other. However, the unit plate portion 22 may be completely surrounded by the bridge portion 23. Accordingly, the pressure receiving portions 3 and 18 are formed in holes. The bending deformation can be allowed in a state where the gap is not free.

(10). 第１０実施形態（図17）
図１７では第１０実施形態を示している。この実施形態では、受圧部３，１８は多数の条体２４によって亀甲模様状の網状に形成されている。従って、左右方向の撓みの程度が大きくて、上下方向（座の場合は前後方向）の撓みの程度は小さい。 (10). Tenth embodiment (FIG. 17)
FIG. 17 shows a tenth embodiment. In this embodiment, the pressure receiving portions 3 and 18 are formed in a turtle shell pattern-like net shape by a large number of strips 24. Therefore, the degree of bending in the left-right direction is large, and the degree of bending in the up-down direction (front-rear direction in the case of a seat) is small.

(11). その他
本願発明は上記の実施形態の他にも様々に具体化することができる。例えば受圧部の構造（パターン）は、デザイン上の要請や強度面からの要請に応じて様々に展開することができる。更に、本願発明の座板や背もたれは各種の椅子（ソファー）に適用することができる。また、請求項には含まれていないが、本願発明ベッドや担架等の椅子以外の身体支持装置にも適用可能である。 (11). Others The present invention can be embodied in various ways other than the above-described embodiment. For example, the structure (pattern) of the pressure receiving portion can be developed in various ways according to design requirements and strength requirements. Further, the seat plate and the backrest of the present invention can be applied to various chairs (sofas). Further, although not included in the claims, the present invention can also be applied to body support devices other than chairs such as beds and stretchers.

また、本願発明の座板や背板はクッション材なしで使用することに好適であるが、クッション材を設けた使用方法を排除するものではない。また、請求項からは離脱するが、射出成形法等よってフレーム部を備えていない受圧部のみを製造して、これを金属製等の枠体等に固定することも可能である。   Moreover, although the seat board and back board of this invention are suitable for using without a cushion material, the usage method which provided the cushion material is not excluded. It is also possible to manufacture only the pressure receiving part not provided with the frame part by injection molding or the like, and to fix it to a metal frame or the like, although it departs from the claims.

第１実施形態の平面図である。It is a top view of a 1st embodiment. 図１の部分拡大図である。It is the elements on larger scale of FIG. 図１の III-III視概略断面図である。FIG. 3 is a schematic sectional view taken along line III-III in FIG. 1. 図１のIV−IV視概略断面図である。FIG. 4 is a schematic sectional view taken along line IV-IV in FIG. 1. 第２実施形態の平面図である。It is a top view of a 2nd embodiment. 第３実施形態を示す図である。It is a figure which shows 3rd Embodiment. 第４実施形態を示す図である。It is a figure which shows 4th Embodiment. 第５実施形態の平面図である。It is a top view of a 5th embodiment. 図８のIX−IX視線での概略断面図である。It is a schematic sectional drawing in the IX-IX line of sight of FIG. 第６実施形態を示す図で、（Ａ）は正面図、（Ｂ）は（Ａ）のＢ−Ｂ視断面図である。It is a figure which shows 6th Embodiment, (A) is a front view, (B) is BB view sectional drawing of (A). 図１０（Ａ）のXI−XI視断面図である。It is XI-XI sectional view taken on the line of FIG. 第７実施形態の正面図である。It is a front view of 7th Embodiment. 図１２のXIII−XIII視断面図である。FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 12. 第８実施形態の正面図である。It is a front view of 8th Embodiment. 図９実施形態の視断面図である。9 is a cross-sectional view of the embodiment. 図１５のXIV-XIV 視断面図である。It is XIV-XIV sectional view taken on the line of FIG. 図１０実施形態を示す図である。10 is a diagram showing an embodiment.

符号の説明Explanation of symbols

１ 座板
２ 座板のフレーム部
３ 座板の受圧部
４ 縦条体
５ 横条体
８ 放射状条体
９ 環状条体
１５ 背板
１６ フレーム部 DESCRIPTION OF SYMBOLS 1 Seat plate 2 Frame part of seat plate 3 Pressure-receiving part of seat plate 4 Vertical strip 5 Horizontal strip 8 Radial strip 9 Ring strip 15 Back plate 16 Frame portion

Claims (5)

着座者の体圧が掛かる受圧部とその周囲を囲うように延びるフレーム部とを合成樹脂によって一体成形しており、前記受圧部を、着座者の体圧によって撓み変形する柔軟構造としている、
椅子の座板又は背板。 The pressure receiving portion to which the body pressure of the seated person is applied and the frame portion extending so as to surround the periphery thereof are integrally formed of a synthetic resin, and the pressure receiving portion has a flexible structure that is bent and deformed by the body pressure of the seated person.
Chair seat or backboard. 合成樹脂製であって着座者の体圧が掛かる受圧部を、着座者の体圧によって撓み変形し得る柔軟構造と成しており、かつ、受圧部において着座者の体圧が作用する受圧面を、着座者の身体にフィットし得る立体形状に形成しており、更に、受圧部は、着座者への突き上げ感を無くした又は軽減した状態に撓み変形するように場所によって弾性強度を異ならせている、
椅子の座板又は背板。 The pressure receiving portion made of synthetic resin and applied with the body pressure of the seated person has a flexible structure that can be bent and deformed by the body pressure of the seated person, and the body pressure of the seated person acts on the pressure receiving portion. Is formed into a three-dimensional shape that can fit the body of the seated person, and the pressure receiving portion has different elastic strength depending on the place so as to be bent and deformed in a state where the feeling of pushing up the seated person is eliminated or reduced. ing,
Chair seat or backboard. 前記受圧部は、細長く延びる条体の多数本が交叉した網状構造と成すことにより、容易に撓み変形することと、場所によって弾性強度を変えることと、加圧面を立体形状にすることとが容易ならしめられている、
請求項１又は請求項２に記載した椅子の座板又は背板。 The pressure receiving portion is formed into a network structure in which a large number of elongated strips intersect each other, so that it can be easily bent and deformed, the elastic strength can be changed depending on the location, and the pressure surface can be easily formed into a three-dimensional shape. Conditioned
A seat plate or a back plate of the chair according to claim 1 or 2. 前記受圧部は、ジグザグ状や波形のように非直線状に延びる縦条体と横条体との群を交叉させることによって網状構造になっている、
請求項３に記載した椅子の座板又は背板。 The pressure receiving portion has a network structure by crossing a group of vertical stripes and horizontal stripes extending in a non-linear manner like a zigzag shape or a waveform,
The seat board or back board of the chair described in Claim 3. 請求項１〜請求項４のうちの何れに記載した座板又は背板を備えている椅子。   The chair provided with the seat board or back board as described in any one of Claims 1-4.
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