JP6936369B2 - Posture holder - Google Patents

Posture holder Download PDF

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JP6936369B2
JP6936369B2 JP2020126510A JP2020126510A JP6936369B2 JP 6936369 B2 JP6936369 B2 JP 6936369B2 JP 2020126510 A JP2020126510 A JP 2020126510A JP 2020126510 A JP2020126510 A JP 2020126510A JP 6936369 B2 JP6936369 B2 JP 6936369B2
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seated person
posture holder
posture
buttock
support portion
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JP2020168583A (en
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松下　剛
剛 松下
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MTG Co Ltd
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MTG Co Ltd
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Priority to JP2023094596A priority patent/JP2023115052A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/021—Detachable or loose seat cushions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/16—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats of legless type, e.g. with seat directly resting on the floor; Hassocks; Pouffes
    • 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
    • A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions

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  • Orthopedics, Nursing, And Contraception (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nursing (AREA)

Description

この発明は、例えば椅子の座部に載せて使用されるものであって、着座者の上体が左右に傾斜しにくいようにすることが可能な姿勢保持具に関するものである。 The present invention relates to, for example, a posture holder that is used by being placed on a seat of a chair and that can prevent the upper body of a seated person from tilting to the left or right.

従来、この種の姿勢保持具としては、例えば特許文献１に開示される構成が提案されている。この従来構成においては、姿勢保持具全体が発泡ポリウレタン等の厚手のクッション材により一体に成形されている。この姿勢保持具には、着座者の体重の大部分を負担する座部が備えられている。 Conventionally, as a posture holder of this type, for example, a configuration disclosed in Patent Document 1 has been proposed. In this conventional configuration, the entire posture holder is integrally molded with a thick cushioning material such as polyurethane foam. The posture holder is provided with a seat that bears most of the weight of the seated person.

特開２０１１−２５４８７８号公報Japanese Unexamined Patent Publication No. 2011-254878

この従来構成においては、着座者の臀部は座部に沈み込むが、座部が左右方向においてフラットに形成されているため、着座者の下肢を安定して支持することが難しい。この結果、着座者は正しい姿勢をとりにくい。 In this conventional arrangement, the buttocks of the seated person are sunk seat, but because the seat is formed flat in the lateral direction, it is difficult to stably support the lower limbs of the seated person. As a result, it is difficult for the seated person to take the correct posture.

この発明は、このような従来の技術に存在する問題点に着目してなされたものである。その目的は、姿勢保持具の左右方向の動きを規制し、着座者の上体が左右に傾斜しにくいようにすることにある。 The present invention has been made by paying attention to the problems existing in such a conventional technique. The purpose is to regulate the movement of the posture holder in the left-right direction so that the upper body of the seated person does not easily tilt to the left or right.

上記の目的を達成するために、この姿勢保持具は、着座者の臀部を支持可能な臀部支持部を備え、前記臀部支持部の下面は左右方向において下向きに凸となる曲面状に形成されており、前記下面には対をなす脚が突設されたことを特徴としている。 In order to achieve the above object, the posture holder is provided with a buttock support portion capable of supporting the buttock portion of the seated person, and the lower surface of the buttock support portion is formed in a curved surface shape that is convex downward in the left-right direction. It is characterized in that a pair of legs are projected on the lower surface.

この構成によれば、姿勢保持具を椅子の座部等の設置面上に載置したとき、脚を介して姿勢保持具が設置面上において滑りをあまり生じることなく、安定状態に支持することができる。特に、脚は姿勢保持具の左右方向の動きを規制し、着座者の上体が左右に傾斜しにくいようにする。 According to this configuration, when the posture holder is placed on the installation surface such as the seat of the chair, the posture holder is supported in a stable state without causing much slippage on the installation surface via the legs. Can be done. In particular, the legs regulate the lateral movement of the posture holder so that the seated person's upper body does not easily tilt to the left or right.

前記の姿勢保持具によれば、姿勢保持具の左右方向の動きを規制し、着座者の上体が左右に傾斜しにくいようにするという効果を発揮する。 According to the posture holder, the movement of the posture holder in the left-right direction is restricted, and the upper body of the seated person is less likely to tilt to the left or right .

第１実施形態の姿勢保持具を示す斜視図。The perspective view which shows the posture holder of 1st Embodiment. 図１の姿勢保持具の正面図。The front view of the posture holder of FIG. 図１の姿勢保持具の平面図。The plan view of the posture holder of FIG. 人体の骨格とあわせて使用状態を示す図２の４−４線の位置における側断面。A side cross section at the position of line 4-4 in FIG. 2, which shows the usage state together with the skeleton of the human body. 使用状態を示す臀部支持部の位置における正断面図。A normal cross-sectional view at the position of the buttock support portion showing the usage state. 使用状態を示す太腿支持部の位置における正断面図。A normal cross-sectional view at the position of the thigh support portion showing the usage state. 図２の７−７線断面図。FIG. 2 is a cross-sectional view taken along the line 7-7 of FIG. 図２の８−８線断面図。FIG. 8-8 is a cross-sectional view taken along the line 8-8 of FIG. 使用状態を斜め後方から見た図。The figure which looked at the usage state diagonally from the rear. 本体の正面図。Front view of the main body. 姿勢保持具の積層構造を示す断面図。The cross-sectional view which shows the laminated structure of the posture holder. 図１０の１２−１２線における断面図。FIG. 10 is a cross-sectional view taken along the line 12-12 of FIG. 第２実施形態の本体の正面図。Front view of the main body of the second embodiment. 第３実施形態の姿勢保持具を示す斜視図。The perspective view which shows the posture holder of the 3rd Embodiment. 図１４の姿勢保持具の背面側の斜視図。FIG. 14 is a perspective view of the back side of the posture holder of FIG. 図１４の姿勢保持具の分解斜視図。FIG. 14 is an exploded perspective view of the posture holder of FIG. 図１４の姿勢保持具の正面図。The front view of the posture holder of FIG. 図１７の１８−１８線における拡大断面図。An enlarged cross-sectional view taken along the line 18-18 of FIG.

以下、実施形態の姿勢保持具を図面に従って説明する。
（第１実施形態）
まず、図１〜図１２に基づいて、第１実施形態について説明する。 Hereinafter, the posture holder of the embodiment will be described with reference to the drawings.
(First Embodiment)
First, the first embodiment will be described with reference to FIGS. 1 to 12.

図１〜図３に示すように、この実施形態の姿勢保持具２１は、全体としてほぼ花弁形状に形成されている。姿勢保持具２１は、ポリプロピレン等の硬質合成樹脂製の板材よりなる本体２２（図４及び図５参照）を含んで構成されている。ここで、硬質合成樹脂とは、発泡材あるいは発泡されていない充実材であって、自重で変形することなく自立可能な硬度を有し、例えば、ロックウェル硬度でＲ５０〜１１０の値の硬度を有する。 As shown in FIGS. 1 to 3, the posture holder 21 of this embodiment is formed in a substantially petal shape as a whole. The posture holder 21 includes a main body 22 (see FIGS. 4 and 5) made of a plate material made of a hard synthetic resin such as polypropylene. Here, the hard synthetic resin is a foamed material or a solid material that is not foamed, and has a hardness that allows it to stand on its own without being deformed by its own weight. Have.

図４及び図５に示すように、姿勢保持具２１の前後方向の中央部には、着座者４１の臀部４２を支持する凹状湾曲形状の臀部支持部２３が形成されている。姿勢保持具２１の一端側である前部下側には前方に向かって前部突出部２４が形成されている。姿勢保持具２１の他端側である後部上側には上方へ向かって上部突出部２５が形成されている。図１及び図２に示すように、前記上部突出部２５の付け根部の左右の両側部には、上部突出部２５の後傾方向への適度な撓曲を可能にするために、一対の第１抉り部３０が形成されている。 As shown in FIGS. 4 and 5, a concave curved buttock support portion 23 that supports the buttock portion 42 of the seated person 41 is formed at the central portion of the posture holder 21 in the front-rear direction. A front protruding portion 24 is formed on the lower front side, which is one end side of the posture holder 21, toward the front. An upper protruding portion 25 is formed upward on the upper rear portion, which is the other end side of the posture holder 21. As shown in FIGS. 1 and 2, a pair of second portions on the left and right sides of the base portion of the upper protruding portion 25 are provided so as to allow an appropriate flexure of the upper protruding portion 25 in the backward tilting direction. One hollow portion 30 is formed.

図４及び図５に示すように、前記臀部支持部２３は、着座者４１の臀部４２を前後方向及び左右方向から安定に支持するように、上面が前後方向及び左右方向において曲面状に形成され、全体としてほぼ球状曲面の凹状に形成されている。臀部支持部２３の下面も球状曲面形状に形成されている。そして、臀部支持部２３及び前部突出部２４の下面は連続する球状曲面形状に形成されている。図１及び図３に示すように、前部突出部２４の中央部前側には、第２抉り部２６が形成されている。図６に示すように、前部突出部２４の左右両側には、つまり第２抉り部２６の両側には、着座者４１の下肢４５をほぼ平行に揃えた状態に支持できるように、前方から見て凹状に湾曲した形状の左右一対の太腿支持部２７が形成されている。これらの太腿支持部２７は、太腿４３をその下側から包み込むように支持する。また、太腿支持部２７は凹状湾曲形状になっているため、太腿４３が左右に開くことを規制する。 As shown in FIGS. 4 and 5, the upper surface of the buttock support portion 23 is formed to have a curved surface shape in the front-rear direction and the left-right direction so as to stably support the buttock portion 42 of the seated person 41 from the front-rear direction and the left-right direction. As a whole, it is formed in a concave shape with a substantially spherical curved surface. The lower surface of the buttocks support portion 23 is also formed in a spherical curved surface shape. The lower surfaces of the buttocks support portion 23 and the front protrusion portion 24 are formed in a continuous spherical curved surface shape. As shown in FIGS. 1 and 3, a second scooping portion 26 is formed on the front side of the central portion of the front protruding portion 24. As shown in FIG. 6, from the front so that the lower limbs 45 of the seated person 41 can be supported on both the left and right sides of the front protruding portion 24, that is, on both sides of the second scooping portion 26 so as to be substantially parallel to each other. A pair of left and right thigh support portions 27 having a concavely curved shape are formed. These thigh support portions 27 support the thigh 43 so as to wrap it from below. Further, since the thigh support portion 27 has a concave curved shape, the thigh 43 is restricted from opening to the left and right.

図２，図７及び図８に示すように、前記上部突出部２５には、上部２８１が凸状湾曲形状をなすとともに、下部２８２が凹状湾曲形状をなす左右一対の腰部支持部２８が形成されている。各腰部支持部２８には凸状湾曲形状をなす上部２８１が内側前方を指向するように斜め前方に向かって膨出形成されている。そのため、図４及び図５に示すように、着座者４１の腰部４４の骨盤１５１部分の両側を、背骨１５２を避けて後方から内側前方に向かって押すことができるようになっている。一対の腰部支持部２８の間には、第３抉り部２９が形成されている。 As shown in FIGS. 2, 7 and 8, the upper protruding portion 25 is formed with a pair of left and right waist support portions 28 having an upper portion 281 having a convex curved shape and a lower portion 282 having a concave curved shape. ing. Each lumbar support portion 28 is formed with an upper portion 281 having a convex curved shape that bulges diagonally forward so as to point inward and forward. Therefore, as shown in FIGS. 4 and 5, both sides of the pelvis 151 portion of the lumbar region 44 of the seated person 41 can be pushed from the rear to the medial anterior side while avoiding the spine 152. A third gouged portion 29 is formed between the pair of lumbar support portions 28.

図１２に示すように、第１抉り部３０の奥部における本体２２の縁部３０１の肉厚ｔ１は、本体２２の他の部分の肉厚ｔ２よりも厚く形成されている。すなわち、腰部支持部２８の撓曲時に、本体２２の第１抉り部３０の奥部の縁部３０１に集中応力が作用する。そして、この応力により縁部３０１及びその近傍部分にクラック等の発生のおそれがある。この場合、このクラック等は肉厚ｔ１の増加によって抑止されるようになっている。 As shown in FIG. 12, the wall thickness t1 of the edge portion 301 of the main body 22 at the inner portion of the first hollowing portion 30 is formed to be thicker than the wall thickness t2 of the other portion of the main body 22. That is, when the lumbar support portion 28 is flexed, a concentrated stress acts on the edge portion 301 at the back of the first scooping portion 30 of the main body 22. Then, due to this stress, there is a possibility that cracks or the like may occur in the edge portion 301 and the portion in the vicinity thereof. In this case, the cracks and the like are suppressed by increasing the wall thickness t1.

図２及び図７に示すように、姿勢保持具２１の臀部支持部２３の下面両側には、一対の脚３１が突設されている。そして、姿勢保持具２１を椅子１００の座部等の設置面上に載置したとき、この脚３１を介して姿勢保持具２１が設置面上において滑りをあまり生じることなく、安定状態に支持されるようになっている。特に、この脚３１は姿勢保持具２１の左右方向の動きを規制し、着座者４１の上体が左右に傾斜しにくいようにする。 As shown in FIGS. 2 and 7, a pair of legs 31 are projected on both sides of the lower surface of the buttocks support portion 23 of the posture holder 21. When the posture holder 21 is placed on an installation surface such as a seat of the chair 100, the posture holder 21 is supported in a stable state through the legs 31 without causing much slippage on the installation surface. It has become so. In particular, the legs 31 regulate the movement of the posture holder 21 in the left-right direction so that the upper body of the seater 41 is less likely to tilt to the left or right.

図１１に示すように、前記本体２２の着座側の面には、連泡性の発泡ポリウレタン等よりなるクッション材３２が貼着されている。本体２２及びクッション材３２を含む姿勢保持具２１全体には、外装シート３４が被覆されている。この外装シート３４は、外側の織布あるいは編布よりなる表皮シート３４１と、その表皮シート３４１の裏面にラミネートされた連泡性のＥＶＡ（エチレン・酢酸ビニル共重合樹脂）等の弾性材よりなる裏シート３４２とによって構成されている。 As shown in FIG. 11, a cushion material 32 made of continuous foam polyurethane or the like is attached to the seating side surface of the main body 22. The entire posture holder 21 including the main body 22 and the cushion material 32 is covered with the exterior sheet 34. The exterior sheet 34 is made of an outer woven or knitted skin sheet 341 and an elastic material such as continuous foam EVA (ethylene-vinyl acetate copolymer resin) laminated on the back surface of the skin sheet 341. It is composed of a back sheet 342.

図１０に示すように、本体２２における上部突出部２５の下部には複数の第１孔３３が相互間隔をおいた位置において貫設されている。このようにすれば、第１孔３３により発汗にともなう湿気を逃がすことができる。また、クッション材３２の成形の際に、図１１に示す通り、第１孔３３内にクッション材３２の一部が進入する。クッション材３２の一部が、第１孔３３内に進入することで、本体２２の表面からのクッション材３２の剥離や、その表面上におけるクッション材３２の移動が抑止される。 As shown in FIG. 10, a plurality of first holes 33 are formed at positions spaced apart from each other in the lower portion of the upper protruding portion 25 of the main body 22. In this way, the first hole 33 allows moisture associated with sweating to escape. Further, when the cushion material 32 is formed, as shown in FIG. 11, a part of the cushion material 32 enters the first hole 33. When a part of the cushion material 32 enters the first hole 33, the peeling of the cushion material 32 from the surface of the main body 22 and the movement of the cushion material 32 on the surface are suppressed.

本体２２の全体には、複数の小さな第２孔２２１が形成されている。この第２孔２２１は前記第１孔３３とともに、着座者の発汗にともなう湿気を逃がすためのものである。この第２孔２２１内にもクッション材３２の成形の際にその一部が進入される。 A plurality of small second holes 221 are formed in the entire main body 22. The second hole 221 together with the first hole 33 is for releasing moisture due to sweating of the seated person. A part of the cushion material 32 is also inserted into the second hole 221 when the cushion material 32 is formed.

次に、前記のように構成された姿勢保持具２１の作用を説明する。
例えばオフィスにおいて、椅子に着座してデスクワークを行う際に、この姿勢保持具２１を使用する場合には、姿勢保持具２１を椅子の座部上に載置する。この状態で、図４〜図６及び図９に示すように、着座者４１が姿勢保持具２１上に着座すると、臀部支持部２３から前部突出部２４に跨る位置の下面が球状曲面形状に形成されているため、着座者４１の体重により姿勢保持具２１がわずかに前傾状態になり、この状態で着座者４１の臀部４２が球面凹状の臀部支持部２３上に支持される。このとき、臀部支持部２３は左右の脚３１によって左右方向への傾斜が規制されるため、左右方向においては、臀部支持部２３は比較的安定している。 Next, the operation of the posture holder 21 configured as described above will be described.
For example, in the office, when the posture holder 21 is used when sitting on a chair and performing desk work, the posture holder 21 is placed on the seat of the chair. In this state, as shown in FIGS. 4 to 6 and 9, when the seated person 41 sits on the posture holder 21, the lower surface of the position extending from the buttock support portion 23 to the front protruding portion 24 has a spherical curved surface shape. Since it is formed, the posture holder 21 is slightly tilted forward due to the weight of the seated person 41, and in this state, the buttocks 42 of the seated person 41 are supported on the spherical concave buttocks support part 23. At this time, since the buttock support portion 23 is restricted from tilting in the left-right direction by the left and right legs 31, the buttock support portion 23 is relatively stable in the left-right direction.

このように、姿勢保持具２１のわずかな前傾とともに着座者４１の臀部４２もわずかに前傾することで、着座者４１の骨盤１５１が立った状態となり、その状態で着座者４１の臀部４２が臀部支持部２３上に支持されることとなる。なお、骨盤１５１が立つことで背筋（せすじ）が自然に伸びる状態になるので、姿勢保持具２１が前傾しても、着座者の上体が前傾することはない。また、着座者４１の両太腿４３が前部突出部２４上の凹状湾曲形状の太腿支持部２７によりほぼ平行状態に支持される。従って、着座者の下肢４５が揃えた状態でサポートされる。 In this way, the buttock 42 of the seated person 41 is also slightly tilted forward with the slight forward tilt of the posture holder 21, so that the pelvis 151 of the seated person 41 is in a standing state, and the buttocks 42 of the seated person 41 is in that state. Will be supported on the buttocks support portion 23. Since the back muscles (streaks) are naturally stretched when the pelvis 151 stands, the upper body of the seated person does not tilt forward even if the posture holder 21 tilts forward. Further, both thighs 43 of the seated person 41 are supported in a substantially parallel state by the concave curved thigh support portion 27 on the front protruding portion 24. Therefore, the seated person's lower limbs 45 are supported in a aligned state.

さらに、姿勢保持具２１の前傾により、上部突出部２５の一対の腰部支持部２８も前方に移動することで、図３及び図４に示すように、着座者４１の腰部４４における腸骨を含む骨盤１５１部分が左右から包み込まれるように支持される。このとき、図８に示すように、腰部４４の両側が上部突出部２５の一対の腰部支持部２８における凸状湾曲形状の上部２８１により、後方から内側前方に向かって押されて支持される。これによって、着座者４１の背筋が無理なく自然に伸びて、良好な座り心地を得た状態で姿勢が正しい状態にサポートされる。従って、着座者４１は、ほとんど疲労を感じることなく、正しい姿勢を長時間維持できる。 Further, by tilting the posture holder 21 forward, the pair of lumbar support portions 28 of the upper protruding portion 25 also move forward, so that the ilium in the lumbar portion 44 of the seated person 41 is moved forward as shown in FIGS. 3 and 4. The 151 part of the pelvis including the pelvis is supported so as to be wrapped from the left and right. At this time, as shown in FIG. 8, both sides of the lumbar portion 44 are pushed and supported from the rear to the inner front by the convex curved upper portion 281 of the pair of lumbar support portions 28 of the upper protruding portion 25. As a result, the back muscles of the seated person 41 are stretched naturally without difficulty, and the posture is supported in a correct state while obtaining a good sitting comfort. Therefore, the seated person 41 can maintain the correct posture for a long time with almost no fatigue.

この場合、姿勢保持具２１の上部突出部２５の付け根部の両側部に、一対の第１抉り部３０が形成されている。このため、着座者４１が着座状態で、後方にもたれかかった場合、上部突出部２５が第１抉り部３０によって幅狭にされた部分において後傾方向へ適度に撓曲されて、着座者４１の動きが許容される。また、着座者４１が太り気味の場合や大きな体形の場合には、その体形による窮屈さが第１抉り部３０によって軽減されて、快適な座り心地を確保することができる。つまり、第１抉り部３０によって、上部突出部２５の付け根部の両側部、すなわち臀部支持部２３と上部突出部２５との間の両側部が開放されているため、着座者の窮屈感が軽減される。 In this case, a pair of first scooping portions 30 are formed on both sides of the base portion of the upper protruding portion 25 of the posture holder 21. Therefore, when the seated person 41 is in the seated state and leans backward, the upper protruding portion 25 is appropriately flexed in the backward tilting direction at the portion narrowed by the first hollowing portion 30, and the seated person 41 Movement is allowed. Further, when the seated person 41 is slightly overweight or has a large body shape, the crampedness due to the body shape is reduced by the first digging portion 30, and a comfortable sitting comfort can be ensured. That is, since both sides of the base portion of the upper protruding portion 25, that is, both side portions between the buttock support portion 23 and the upper protruding portion 25 are opened by the first scooping portion 30, the feeling of crampedness of the seated person is reduced. Will be done.

なお、この姿勢保持具２１は椅子の座部上で使用されるだけではなく、床面上に設置して使用することもできる。すなわち、本体２２が硬質材で構成されているため、姿勢を保持可能な座椅子として使用することが可能である。 The posture holder 21 can be used not only on the seat of the chair but also on the floor. That is, since the main body 22 is made of a hard material, it can be used as a sitting chair capable of maintaining a posture.

前記姿勢保持具２１は、例えば、前部突出部２４を設けないように構成することも可能である。この場合、例えば、図３に１点鎖線１０１で示す位置が姿勢保持具２１の前端になる。このように構成した場合、例えば、床に置いて座椅子として使用する場合には、太腿支持部２７により下肢４５が規制されることが無くなるので、胡坐等任意の姿勢で座りやすくなる等、着座者４１の下肢４５の自由度が増える。ただし、太腿支持部２７による下肢４５の支えが無くなるので、太腿４３を水平に保つ効果は若干薄れるが、床上であるため、ほとんど問題はない。そして、左右方向において脚３１が形成されている臀部支持部２３により、臀部４２をほぼ水平に保つことが可能となる。この為、太腿支持部２７を設けない場合であっても、臀部支持部２３によって臀部４２が前後方向及び左右方向において安定に、かつ自然に無理なく支持され、腰部４４の両側が腰部支持部２８における凸状湾曲形状の上部２８１により、後方から内側前方に向かって押されて支持されるため、着座者４１の上体を正しい姿勢の状態でサポートすることができる。 The posture holder 21 can be configured so as not to provide the front protruding portion 24, for example. In this case, for example, the position indicated by the alternate long and short dash line 101 in FIG. 3 is the front end of the posture holder 21. In this configuration, for example, when the leg is placed on the floor and used as a sitting chair, the lower limbs 45 are not regulated by the thigh support portion 27, so that it becomes easier to sit in any posture such as cross-legged. , The degree of freedom of the lower limbs 45 of the seated person 41 is increased. However, since the lower limbs 45 are not supported by the thigh support portion 27, the effect of keeping the thigh 43 horizontal is slightly diminished, but since it is on the floor, there is almost no problem. Then, the buttock support portion 23 on which the legs 31 are formed in the left-right direction makes it possible to keep the buttock portion 42 substantially horizontal. Therefore, even if the thigh support portion 27 is not provided, the buttock support portion 23 stably and naturally supports the buttock portion 42 in the front-rear direction and the left-right direction, and both sides of the waist portion 44 are the waist portion support portions. Since the convex curved upper portion 281 of the 28 is pushed and supported from the rear to the inner front, the upper body of the seater 41 can be supported in the correct posture.

上記した実施形態によれば、以下のような効果を得ることができる。
（１）上記した実施形態によれば、着座者４１の臀部４２を支持する臀部支持部２３が前後方向及び左右方向において凹状湾曲形状に形成されている。従って、臀部支持部２３によって臀部４２を前後方向及び左右方向において安定に、かつ自然に無理なく支持することができるだけではなく、臀部４２を支持する面積が広くなって、体圧が分散される。このため、着座者４１は疲労や不快さをあまり感じることなく着座状態を維持できる。 According to the above-described embodiment, the following effects can be obtained.
(1) According to the above-described embodiment, the buttock support portion 23 that supports the buttock portion 42 of the seated person 41 is formed in a concave curved shape in the front-rear direction and the left-right direction. Therefore, the buttock support portion 23 can not only support the buttock portion 42 stably and naturally in the front-rear direction and the left-right direction, but also increase the area for supporting the buttock portion 42 to disperse the body pressure. Therefore, the seated person 41 can maintain the seated state without feeling much fatigue or discomfort.

（２）前部突出部２４の凹状湾曲形状をなす左右２箇所の太腿支持部２７により、着座者４１の両太腿４３が下側から広い面積で安定に支持されて、下肢４５が自然に揃えられる。また、太腿支持部２７は凹状湾曲形状になっている為に、両太腿４３が左右に開くことを規制する。従って、前記と同様に、体圧が分散されて、疲労等を感じることなく着座状態を維持できるとともに、着座者４１の骨盤１５１が傾くことなく、骨盤１５１を水平に保つことが可能になる。このため、図５に示すように、背骨１５２を左右方向において自然に直立させることができる。 (2) Both thighs 43 of the seated person 41 are stably supported in a wide area from the lower side by the two left and right thigh support portions 27 having a concave curved shape of the front protruding portion 24, and the lower limbs 45 are naturally supported. Aligned with. Further, since the thigh support portion 27 has a concave curved shape, both thighs 43 are restricted from opening to the left and right. Therefore, similarly to the above, the body pressure is dispersed, the seated state can be maintained without feeling fatigue, and the pelvis 151 of the seated person 41 can be kept horizontal without tilting. Therefore, as shown in FIG. 5, the spine 152 can be naturally upright in the left-right direction.

（３）姿勢保持具２１の本体２２が硬質の板材によって形成されている。このため、姿勢保持具２１全体をクッション材等の厚手の弾性材により形成した従来構成とは異なって、太腿４３及び腰部４４を腰部支持部２８において、前記厚手の弾性材のような大きな弾性変形を生じることなくしっかりとサポートすることができて、姿勢の保持効果を高めることができる。仮に、着座者４１が姿勢を崩した場合、姿勢保持具２１はほとんど変形しないため、着座者４１は直ちに正しい姿勢に戻ることができる。そして、姿勢が正しく保持されることにより、姿勢を維持する筋肉が使用されて、その筋肉を鍛えることができ、その結果、姿勢保持具２１を使用しない場合も自然に正しい姿勢を保つことができる。また、姿勢保持具全体をクッション材で形成した前記従来構成では、姿勢保持具を椅子に載せた場合、その厚みのために座面が高くなって使用しにくいものとなる。これに対し、本実施形態では本体２２が硬質樹脂で形成されているため、従来構成とは異なり、姿勢保持具２１の厚みを薄くできて、姿勢保持具２１を椅子１００上に載せて用いることにおいて支障が生じることはほとんどない。 (3) The main body 22 of the posture holder 21 is formed of a hard plate material. Therefore, unlike the conventional configuration in which the entire posture holder 21 is formed of a thick elastic material such as a cushion material, the thigh 43 and the lumbar portion 44 are placed in the lumbar support portion 28 with a large elasticity like the thick elastic material. It is possible to firmly support without causing deformation, and it is possible to enhance the effect of maintaining the posture. If the seated person 41 loses his / her posture, the posture holder 21 hardly deforms, so that the seated person 41 can immediately return to the correct posture. Then, when the posture is correctly held, the muscles that maintain the posture can be used to train the muscles, and as a result, the correct posture can be naturally maintained even when the posture holder 21 is not used. .. Further, in the conventional configuration in which the entire posture holder is formed of a cushion material, when the posture holder is placed on a chair, the seat surface becomes high due to its thickness, which makes it difficult to use. On the other hand, in the present embodiment, since the main body 22 is made of hard resin, the thickness of the posture holder 21 can be reduced unlike the conventional configuration, and the posture holder 21 is used by being placed on the chair 100. There is almost no problem in.

（４）臀部支持部２３から前部突出部２４にかけてその下面が前後方向において大きな曲率半径の球状曲面状をなしているため、着座者４１の着座状態において、姿勢保持具２１が前傾状態になる。従って、着座者４１の骨盤１５１が立った状態でサポートされ、着座者４１が、背筋が自然に伸びた姿勢となる。その着座者４１は、その状態で上部突出部２５の腰部支持部２８により腰部４４における背骨１５２の両側において、腸骨を含む骨盤１５１の部分が左右両側の斜め後ろから前方に向かって押されるように支持されて、腰部４４が包み込まれるようにサポートされる。 (4) Since the lower surface of the buttock support portion 23 to the front protruding portion 24 has a spherical curved surface shape with a large radius of curvature in the front-rear direction, the posture holder 21 is tilted forward in the seated state of the seater 41. Become. Therefore, the pelvis 151 of the seated person 41 is supported in a standing state, and the seated person 41 is in a posture in which the back muscle is naturally extended. In that state, the seated person 41 pushes the portion of the pelvis 151 including the ilium diagonally backward to forward on both the left and right sides on both sides of the spine 152 in the lumbar region 44 by the lumbar support portion 28 of the upper protruding portion 25. The waist 44 is supported so as to be wrapped around the waist 44.

このため、着座者４１の腰椎の部分も前方に向かって押されて、図４及び図５に示すように、着座者４１は、臀部４２と両太腿４３が安定支持されることも相俟って、上体、すなわち背骨１５２が左右に傾くことなく、正しい姿勢となるように自然に理想的なＳカーブ形状となって起立される。しかも、脚３１によって姿勢保持具２１の左右方向の安定性を得ることができて、上体の傾きを抑制でき、さらに正しい姿勢を得ることができる。従って、仮に着座者４１の背骨１５２に左右方向への歪みがあっても、あるいは猫背気味であっても、体が正しい状態でサポートされて、着座者４１の上体が左右中立状態の適正な姿勢で自然に伸びる。 Therefore, the lumbar portion of the seated person 41 is also pushed forward, and as shown in FIGS. 4 and 5, the seated person 41 is also able to stably support the buttocks 42 and both thighs 43. Therefore, the upper body, that is, the spine 152, is naturally erected in an ideal S-curve shape so as to be in the correct posture without tilting to the left or right. Moreover, the legs 31 can obtain the stability of the posture holder 21 in the left-right direction, suppress the inclination of the upper body, and further obtain the correct posture. Therefore, even if the spine 152 of the seated person 41 is distorted in the left-right direction or has a stoop, the body is supported in a correct state, and the upper body of the seated person 41 is in a proper left-right neutral state. It grows naturally in a posture.

このため、着座者４１の腰への負担も軽減できて、着座者４１は、リラックスしながら背筋が伸びて正しい姿勢を無理なく維持でき、長時間着座していても、腰部４４や下肢４５に対する負担を少なくできて、疲労感を少なくすることができる。ちなみに、姿勢保持具２１を使用することなく、着座者４１の背骨１５２や、腰椎を直接前方へ押した場合も背筋を伸ばすことは可能であるが、このような場合、着座者４１は痛みや不快さを感じるため、長時間の着座維持は難しい。なお、着座者４１が、腰部４４が前方に湾曲する反り腰であっても、腰部４４を腰部支持部２８に支持することにより、骨盤１５１や背骨１５２が包み込まれるようにサポートされるため、腰部４４に対する負担を軽減できて、リラックスすることができる。 Therefore, the burden on the lower back of the seated person 41 can be reduced, and the seated person 41 can relax and maintain the correct posture without difficulty, and even if he / she sits for a long time, he / she can deal with the lower back 44 and the lower limbs 45. The burden can be reduced and the feeling of fatigue can be reduced. By the way, it is possible to stretch the spine 152 of the seated person 41 or the back muscle even when the lumbar spine is pushed directly forward without using the posture holder 21, but in such a case, the seated person 41 suffers from pain. It is difficult to maintain a sitting position for a long time because of discomfort. Even if the seated person 41 has a warped waist in which the waist portion 44 is curved forward, by supporting the waist portion 44 to the waist portion support portion 28, the pelvis 151 and the spine 152 are supported so as to be wrapped around the waist portion. The burden on 44 can be reduced and the person can relax.

（５）臀部支持部２３及び前部突出部２４の下面が左右方向においても大きな曲率半径の球状曲面形状に形成されているため、姿勢保持具２１の左右方向へのある程度の傾動が許容される。従って、着座者４１は左右に上体を軽く傾けることができて、窮屈さを避けることができる。 (5) Since the lower surfaces of the buttock support portion 23 and the front protruding portion 24 are formed in a spherical curved surface shape having a large radius of curvature even in the left-right direction, the posture holder 21 is allowed to tilt to some extent in the left-right direction. .. Therefore, the seated person 41 can slightly tilt the upper body to the left and right, and can avoid cramping.

（６）姿勢保持具２１における臀部支持部２３の下面の両側に脚３１が突設されている。このため、姿勢保持具２１を例えば椅子１００の座部上において滑りを生じたり、左右方向に過度に傾いたりすることを抑制して、安定状態で載置することができる。 (6) Legs 31 are projected on both sides of the lower surface of the buttocks support portion 23 of the posture holder 21. Therefore, the posture holder 21 can be placed in a stable state by suppressing slippage or excessive tilting in the left-right direction on the seat portion of the chair 100, for example.

（７）上部突出部２５の付け根部の両側部に第１抉り部３０が形成されている。このため、姿勢保持具２１の本体２２が硬質の合成樹脂によって形成されていても、着座者４１が臀部支持部２３に着座した状態で、仰け反ったりして上部突出部２５に対して後傾方向への荷重をかけた場合、上部突出部２５を撓曲させることができる。このため、着座者４１の正しい姿勢維持と、疲れにくさとに貢献できる。すなわち、姿勢保持具２１の本体２２が硬質の合成樹脂によって形成されているため、姿勢保持具２１が剛性と硬さとを備え、形状変化が小さいものの、所要部分の変形を確保できる。従って、姿勢保持具２１の本来の機能を有効に発揮するとともに、無理なくリラックスした姿勢保持に貢献できる。 (7) First scooping portions 30 are formed on both sides of the base portion of the upper protruding portion 25. Therefore, even if the main body 22 of the posture holder 21 is made of a hard synthetic resin, the seated person 41 may lean back with respect to the upper protruding portion 25 while sitting on the buttocks support portion 23 in the backward tilting direction. When a load is applied to, the upper protrusion 25 can be flexed. Therefore, it is possible to contribute to maintaining the correct posture of the seated person 41 and reducing fatigue. That is, since the main body 22 of the posture holder 21 is made of a hard synthetic resin, the posture holder 21 has rigidity and hardness, and although the shape change is small, the deformation of the required portion can be ensured. Therefore, the original function of the posture holder 21 can be effectively exerted, and the posture holder can contribute to the relaxed posture maintenance without difficulty.

（８）そして、これに加えて、臀部支持部２３が凹状の球状曲面形状に形成されているため、臀部支持部２３から上方に連続する上部突出部２５の付け根部も臀部支持部２３と同様な凹状の球状曲面形状に形成されている。従って、本実施形態と異なり、第１抉り部３０が形成されていない場合にあっては、上部突出部２５は、硬く、後方へ撓曲しにくい形状となるが、本実施形態では前記のように、上部突出部２５の付け根部の両側部に第１抉り部３０が形成されているため、撓曲しにくさが解消されて、上部突出部２５は着座者４１の体の動きに適切に対応できる。 (8) In addition to this, since the buttock support portion 23 is formed in a concave spherical curved surface shape, the base portion of the upper protruding portion 25 continuous upward from the buttock support portion 23 is also the same as the buttock support portion 23. It is formed in a concave spherical curved surface shape. Therefore, unlike the present embodiment, when the first hollow portion 30 is not formed, the upper protruding portion 25 has a shape that is hard and does not easily bend backward, but as described above in the present embodiment. In addition, since the first scooping portions 30 are formed on both sides of the base portion of the upper protruding portion 25, the difficulty of flexing is eliminated, and the upper protruding portion 25 is suitable for the movement of the body of the seated person 41. I can handle it.

（９）上部突出部２５の付け根部の両側に第１抉り部３０が形成されて、同部分が開放されているため、着座者４１が窮屈感を感じることを抑えることができる。これに対し、前記抉り部３０が形成されていない場合は、着座者４１は体形が大きい場合、臀部がこの部位に当たることもあり、このような場合は窮屈感を覚えることになる。 (9) Since the first scooping portions 30 are formed on both sides of the base portion of the upper protruding portion 25 and the same portions are open, it is possible to prevent the seated person 41 from feeling cramped. On the other hand, when the scooping portion 30 is not formed, the seated person 41 may feel cramped when the body shape is large and the buttocks may hit this portion.

（１０）第１〜第３抉り部３０，２６，２９の形成によって姿勢保持具２１全体の軽量化を図ることができる。
（１１）前記のように、腰部支持部２８の間に第３抉り部２９が形成されている。このため、着座者４１が後方へ仰け反るようにした場合や、後ろに大きく凭れかかった場合に、着座者４１の背骨の部分が上部突出部２５に当たることを回避できる。従って、このような場合における不快さを避けることができる。 (10) The weight of the posture holder 21 as a whole can be reduced by forming the first to third scooping portions 30, 26, and 29.
(11) As described above, the third hollow portion 29 is formed between the lumbar support portions 28. Therefore, it is possible to prevent the spine portion of the seated person 41 from hitting the upper protruding portion 25 when the seated person 41 leans backward or leans back greatly. Therefore, discomfort in such a case can be avoided.

（１２）第１抉り部３０，第２抉り部２６，第３抉り部２９によって４箇所に抉り部が形成されている。このため、姿勢保持具２１全体が花弁形状を呈し、デザイン性に優れたものとすることができる。 (12) The first digging portion 30, the second digging portion 26, and the third digging portion 29 form digging portions at four locations. Therefore, the entire posture holder 21 has a petal shape, and the design can be excellent.

（１３）前記第１抉り部３０の縁部３０１が他の部分より肉厚になるように形成されている。このため、上部突出部２５の傾動による変形により、第１抉り部３０に大きな応力が加わった場合でも、第１抉り部３０の縁部３０１が破損するおそれを抑制することができる。 (13) The edge portion 301 of the first hollowed portion 30 is formed to be thicker than the other portions. Therefore, even if a large stress is applied to the first hollow portion 30 due to the deformation due to the tilt of the upper protruding portion 25, it is possible to suppress the possibility that the edge portion 301 of the first hollow portion 30 is damaged.

（１４）前記本体２２の着座側の面にクッション材３２が設けられている。このため、クッション材３２の弾性作用及び緩衝作用により座り心地を良好に保つことができる。
（１５）全体が外装シート３４により被覆されている。このため、姿勢保持具２１全体の外観を美しく保つことができる。 (14) A cushion material 32 is provided on the seating side surface of the main body 22. Therefore, the sitting comfort can be kept good by the elastic action and the buffering action of the cushion material 32.
(15) The whole is covered with the exterior sheet 34. Therefore, the appearance of the entire posture holder 21 can be kept beautiful.

（第２実施形態）
次に、本発明の第２実施形態を図１３に基づいて説明する。なお、この第２実施形態以降の実施形態及び変更例においては、第１実施形態と異なる部分を中心に説明する。 (Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIG. In the second and subsequent embodiments and modified examples, the parts different from the first embodiment will be mainly described.

第２実施形態では、図１３に示すように、第１実施形態のような本体２２の第１孔３３及び第２孔２２１が設けられていない。従って、第２実施形態においては、本体２２の成形が容易になる。 In the second embodiment, as shown in FIG. 13, the first hole 33 and the second hole 221 of the main body 22 as in the first embodiment are not provided. Therefore, in the second embodiment, the molding of the main body 22 becomes easy.

（第３実施形態）
次に、本発明の第３実施形態を図１４〜図１８に基づいて説明する。
本実施形態においては、前記第１実施形態と比較して、第２抉り部２６及び第３抉り部２９の抉り度合いが浅く形成されている。 (Third Embodiment)
Next, the third embodiment of the present invention will be described with reference to FIGS. 14 to 18.
In the present embodiment, the degree of scooping of the second scooping portion 26 and the third scooping portion 29 is shallower than that of the first embodiment.

また、ポリプロピレン等の硬質材よりなる本体２２上の着座面側にはＥＶＡよりなる単層の外装シート５１がエラストマ系の接着剤を用いて接着されている。図１６及び図１８に示すように、外装シート５１の周縁部には折り返し５１１が形成され、この折り返し５１１が本体２２の周縁部に嵌められた状態で外装シート５１が本体２２の着座側の面に接着されている。本体２２の背面及び下面は露出されている。外装シート５１は柔軟性と弾力性とを有するとともに、通気性を有する多孔質材で構成されている。 Further, a single-layer exterior sheet 51 made of EVA is adhered to the seating surface side on the main body 22 made of a hard material such as polypropylene by using an elastomer-based adhesive. As shown in FIGS. 16 and 18, a folded-back 511 is formed on the peripheral edge of the exterior sheet 51, and the exterior sheet 51 is a seating-side surface of the main body 22 with the folded-back 511 fitted to the peripheral edge of the main body 22. It is glued to. The back surface and the lower surface of the main body 22 are exposed. The exterior sheet 51 is made of a porous material having flexibility, elasticity, and breathability.

上部突出部２５には複数の孔５２が形成されている。各孔５２は図１８に示すように、本体２２の孔５２１と外装シート５１の孔５２２とにより構成され、外装シート５１の孔５２１が本体２２の孔５２１より大きく形成されている。このため、外装シート５１の孔５２２の内周縁が本体２２の孔５２１の内周縁より孔中心側に突出して、着座者４１に対して本体２２の孔５２１の内周縁が当たらないようになっている。 A plurality of holes 52 are formed in the upper protruding portion 25. As shown in FIG. 18, each hole 52 is composed of a hole 521 of the main body 22 and a hole 522 of the exterior sheet 51, and the hole 521 of the exterior sheet 51 is formed larger than the hole 521 of the main body 22. Therefore, the inner peripheral edge of the hole 522 of the exterior sheet 51 projects from the inner peripheral edge of the hole 521 of the main body 22 toward the center of the hole so that the inner peripheral edge of the hole 521 of the main body 22 does not hit the seated person 41. There is.

図１５に示すように、前部突出部２５の底面及び脚３１の下端には摩擦係数の高い材質のものよりなる複数の滑り止め５３が貼着されている。
第３実施形態においては、以下の効果がある。 As shown in FIG. 15, a plurality of anti-slip 53s made of a material having a high coefficient of friction are attached to the bottom surface of the front protruding portion 25 and the lower ends of the legs 31.
In the third embodiment, there are the following effects.

（１６）姿勢保持具２１が本体２２の着座面側に単層の外装シート５１を被せて構成されているため、部品点数が少なく、構成が簡単である。また、本体２２の背面及び下面が露出されているため、外装シート５１は小さなものでよく、しかも、外装シート５１を本体２２に被せることは容易である。従って、姿勢保持具２１を安価に製作できる。 (16) Since the posture holder 21 is configured by covering the seating surface side of the main body 22 with a single-layer exterior sheet 51, the number of parts is small and the configuration is simple. Further, since the back surface and the lower surface of the main body 22 are exposed, the exterior sheet 51 may be small, and it is easy to cover the exterior sheet 51 with the main body 22. Therefore, the posture holder 21 can be manufactured at low cost.

（変更例）
なお、この実施形態は、次のように変更して具体化することも可能である。
・姿勢保持具２１の臀部支持部２３を球状曲面形状以外の形状、例えば平面や、円筒状凹形状、凹状湾曲形状等にすること。この場合、臀部支持部２３により、臀部４２が前後方向及び左右方向から安定に支持される効果は薄れる。しかし、左右方向については、太腿４３が凹状湾曲形状の太腿支持部２７により規制を受けることになるため、その影響を受けて、臀部４２も安定することになる。よって、着座者４１は、骨盤１５１を水平に保った状態で、腰部４４の両側が腰部支持部２８により、後方から内側前方に向かって押されて支持される。以上のように、姿勢保持具２１の臀部支持部２３を球状曲面形状以外の形状に形成した場合であっても、着座者４１の姿勢を正しい状態でサポートすることが可能である。 (Change example)
It should be noted that this embodiment can also be modified and embodied as follows.
-The buttock support portion 23 of the posture holder 21 has a shape other than the spherical curved surface shape, for example, a flat surface, a cylindrical concave shape, a concave curved shape, or the like. In this case, the effect of the buttock support portion 23 stably supporting the buttock portion 42 from the front-rear direction and the left-right direction is diminished. However, in the left-right direction, the thigh 43 is regulated by the concave curved thigh support portion 27, and the buttock portion 42 is also stabilized under the influence of the regulation. Therefore, the seated person 41 is supported by being pushed from the rear to the medial front by the lumbar support portions 28 on both sides of the lumbar portion 44 while keeping the pelvis 151 horizontal. As described above, even when the buttocks support portion 23 of the posture holder 21 is formed in a shape other than the spherical curved surface shape, it is possible to support the posture of the seated person 41 in a correct state.

・クッション材３２を本体２２の着座側とその反対側との両方の面に設けること。
・クッション材３２を省略すること。
・外装シート３４を省略すること。 -The cushion material 32 is provided on both the seating side and the opposite side of the main body 22.
-Omit the cushion material 32.
-Omit the exterior sheet 34.

・クッション材３２及び外装シート３４の双方を省略すること。つまり、姿勢保持具２１を本体２２のみを含んで構成すること。
・姿勢保持具２１の下面の脚３１を省略し、その下面をフラットにすること。 -Omit both the cushion material 32 and the exterior sheet 34. That is, the posture holder 21 is configured to include only the main body 22.
-Omit the legs 31 on the lower surface of the posture holder 21 and flatten the lower surface.

・腰部支持部２８の付け根部の第１抉り部３０を左右の一側のみに設けること。
・第１抉り部３０以外の抉り部を形成しないようにすること。第３抉り部２９が形成されない場合、一対の腰部支持部２８が連続して外観上ひとつになるが、腰部支持部２８が前方に突出しているため、中央の連続部分が背骨１５２やその両側に当たることなく、腰部４４の両側を押さえることができるため、実質的には一対存在することになる。 -Provide the first scooping portion 30 at the base of the lumbar support portion 28 on only one of the left and right sides.
-Do not form a hollow portion other than the first hollow portion 30. When the third lumbar support portion 29 is not formed, the pair of lumbar support portions 28 are continuously united in appearance, but since the lumbar support portion 28 projects forward, the central continuous portion hits the spine 152 and both sides thereof. Since both sides of the lumbar portion 44 can be pressed without having to do so, there are substantially a pair.

・臀部支持部２３を前後方向または左右方向の一方向において直線状に形成すること。
・本体２２を樹脂をガラス繊維によって強化したＦＲＰ（ガラス繊維強化樹脂）により構成すること。 -The buttock support portion 23 is formed linearly in one direction in the front-rear direction or the left-right direction.
-The main body 22 is made of FRP (glass fiber reinforced plastic) in which resin is reinforced with glass fiber.

２１…姿勢保持具、２２…本体、２３…臀部支持部、２４…前部突出部、２５…上部突出部、２６…第２抉り部、２７…太腿支持部、２８…腰部支持部、２９…第３抉り部、３０…第１抉り部、３０１…縁部、３１…脚、３２…クッション材、３４…外装シート、４１…着座者、４２…臀部、４３…太腿、４４…腰部、４５…下肢、５２…背骨、ｔ１…縁部の肉厚、ｔ２…他の部分の肉厚。 21 ... Posture holder, 22 ... Main body, 23 ... Buttocks support, 24 ... Front protrusion, 25 ... Upper protrusion, 26 ... Second scoop, 27 ... Thigh support, 28 ... Waist support, 29 ... 3rd scooping part, 30 ... 1st scooping part, 301 ... edge, 31 ... legs, 32 ... cushioning material, 34 ... exterior sheet, 41 ... seated person, 42 ... buttocks, 43 ... thighs, 44 ... waist, 45 ... lower limbs, 52 ... spine, t1 ... edge wall thickness, t2 ... other part wall thickness.

Claims (5)

着座者の臀部を支持可能な臀部支持部を備え、
前記臀部支持部の下面は左右方向において下向きに凸となる曲面状に形成されており、
前記下面には対をなす脚が突設されている姿勢保持具。 Equipped with a buttock support that can support the buttock of the seated person,
The lower surface of the buttock support portion is formed in a curved surface shape that is convex downward in the left-right direction.
A posture holder in which paired legs are projected on the lower surface. 着座者の臀部を支持可能な臀部支持部を備え、
前記臀部支持部の下面は前後方向において下向きに凸となる曲面状に形成されており、
前記下面には対をなす脚が突設されている姿勢保持具。 Equipped with a buttock support that can support the buttock of the seated person,
The lower surface of the buttocks support portion is formed in a curved surface shape that is convex downward in the front-rear direction.
A posture holder in which paired legs are projected on the lower surface. 着座者の臀部を支持可能な臀部支持部を備え、
前記臀部支持部の下面は下向きに凸となる球状曲面形状に形成されており、
前記下面には対をなす脚が突設されている姿勢保持具。 Equipped with a buttock support that can support the buttock of the seated person,
The lower surface of the buttocks support portion is formed in a spherical curved surface shape that is convex downward.
A posture holder in which paired legs are projected on the lower surface. 前記対をなす脚は前記臀部支持部の前後方向において後方に形成されている請求項１ないし３のいずれか１項に記載の姿勢保持具。 The posture holder according to any one of claims 1 to 3, wherein the paired legs are formed rearward in the front-rear direction of the buttocks support portion. 前記対をなす脚は前記臀部支持部の前後方向に延設されている請求項１ないし３のいずれか１項に記載の姿勢保持具。 The posture holder according to any one of claims 1 to 3, wherein the pair of legs extends in the front-rear direction of the buttocks support portion.
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