JP2007295940A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair enabling a seat occupant to sit thereon in good posture by improving the way of sitting on the chair of the seat occupant to improve the awareness of the body of the seat occupant by the seat occupant so that the seat occupant can bring two points of a hip part on both sides of right and left ischial bones in contact with a seat surface to stabilize a pelvis in the state of vertically standing to the seat surface. <P>SOLUTION: The chair is characterized by comprising a tilt means having seat parts 3a and 3b divided at least into right and left parts for the seat occupant and capable of tilting the seat parts 3a and 3b at least to the rear outer sides relative to the horizontal seat surface of the seat parts 3a and 3b, and a fixing means fixing the seat parts 3a and 3b at a desired tilt position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、家庭、学校その他の教育施設、職場等において使用する椅子に関し、特に、着座者の身体意識を高め、左右の座骨を中心とした臀部の二点を座面に接触させて、骨盤を座面に対して垂直方向に立たせるような状態で、自然に着座者の背骨が伸び、姿勢よく座ることが可能となる椅子に関する。   The present invention relates to a chair used in homes, schools, other educational facilities, workplaces, etc., and in particular, raises the body consciousness of a seated person and brings two points of the buttocks centering on the left and right scapulae into contact with the seating surface. The present invention relates to a chair that allows a seated person's spine to naturally stretch and sit in a good posture in a state in which the seat stands in a direction perpendicular to the seating surface.

椅子は、家庭、学校等の教育施設、職場等において、日常的に長時間使用されるものであり、着座者の用途に合せて様々な形状や機能を備えた椅子が提供されている。
例えば、特許文献１には、着座者の臀部や大腿部が座面で圧迫されることによって鬱血等を生じないように、着座者の動きに合せて揺動可能となる一対の可動着座部を設けた椅子が開示されている。また、特許文献２には、左右に設けた肘当で区画された空間内部に、前記肘当の下方から前記空間内方に向けて突出した中割れ座面を設け、前記中割れ座面のそれぞれを前後方向と左右方向に傾斜できるようにした介護用椅子が開示されている。
特開平１１−１５１１２９号公報 特表２００１−５１７５１４号公報 Chairs are used for a long time on a daily basis in educational facilities such as homes and schools, workplaces, and the like, and chairs having various shapes and functions are provided according to the use of a seated person.
For example, Patent Document 1 discloses a pair of movable seating portions that can swing in accordance with the movement of the seated person so as not to cause congestion or the like when the buttocks and thighs of the seated person are pressed by the seating surface. A chair provided with is disclosed. Further, in Patent Document 2, an interior of the space defined by the left and right elbow rests is provided with a split seat surface that protrudes from the lower part of the elbow rest toward the inside of the space. There is disclosed a care chair that can be inclined in the front-rear direction and the left-right direction.
Japanese Patent Laid-Open No. 11-151129 JP-T-2001-517514

しかしながら、特許文献１に開示されているような椅子は、着座者の快適性を追求したものである。また、特許文献２に開示されているような椅子は、着座者の快適性とともに、介護者の利便性を追求したものである。このように、特許文献１及び２に開示されている椅子は、着座者の骨格、筋肉等を考慮して、着座者の姿勢の向上を目的として設計されたものではなかった。例えば、特許文献２に開示されている介護用椅子にあっては、左右に設けた肘当で区画された空間内部に中割れ座面を設けているため、左右の肘当てで制限されて、着座者が膝を中割れ座面の外方に向けて開脚することができず、着座者が背骨を真っ直ぐにして座りにくい設計となっている。
ところで、生活様式等の違いから、例えば、日本人と欧米人では、骨格や、筋肉等の使い方が異なるため、椅子に着座したときの姿勢が異なる傾向がある。例えば、欧米人は、一般的に、左右の座骨を中心とした臀部の二点を座面に接触させ、骨盤を座面に対して垂直方向に立たせるような状態で、椅子に座る傾向がある。このため、着座者の骨盤が安定した状態となり、着座者は、背骨が真っ直ぐに伸びた状態で、姿勢よく椅子に座ることができる。一方、例えば、日本人は、一般的に、尾てい骨を中心として、臀部を広い面積で座面に接触させるような状態で、椅子に座る傾向がある。このため、着座者の骨盤が不安定な状態となり、着座者は、背骨が丸く曲がった前屈みの状態で、姿勢悪く椅子に座りやすい。
そこで、本発明は、着座者の椅子の座り方に着目し、着座者の身体意識を高め、着座者が、左右の座骨を中心とした臀部の二点を座面に接触させて、骨盤を座面に対して垂直方向に立たせるような状態で、骨盤を安定させ、姿勢よく座ることが可能となる椅子を提供することを目的とする。 However, the chair as disclosed in Patent Document 1 pursues the comfort of the seated person. Moreover, the chair as disclosed in Patent Document 2 pursues the convenience of the caregiver as well as the comfort of the seated person. As described above, the chairs disclosed in Patent Documents 1 and 2 are not designed for the purpose of improving the posture of the seated person in consideration of the skeleton, muscles, and the like of the seated person. For example, in the care chair disclosed in Patent Document 2, because the seat surface is split in the space partitioned by the left and right elbow pads, is limited by the left and right elbow pads, The seated person cannot open his legs with his knees facing the outside of the half-seat seating surface, and the seated person is not designed to sit down with his spine straight.
By the way, due to differences in lifestyle, for example, Japanese and Westerners tend to have different postures when seated on a chair because their skeletons and muscles are used differently. For example, Westerners generally tend to sit on a chair with two points on the hips centered on the left and right seat bones in contact with the seat surface and with the pelvis standing vertically to the seat surface. is there. Therefore, the pelvis of the seated person is in a stable state, and the seated person can sit on the chair with a good posture with the spine straightly extended. On the other hand, for example, Japanese people generally tend to sit on a chair in a state where the buttocks are in contact with the seating surface over a large area centering on the tailbone. For this reason, the seated person's pelvis is in an unstable state, and the seated person tends to sit in a chair with a poor posture in a forward bent state with the spine bent round.
Therefore, the present invention focuses on the sitting method of the seated person's chair, raises the body consciousness of the seated person, and the seated person contacts the seat surface with two points of the buttocks centering on the left and right seated bones, An object of the present invention is to provide a chair that can stabilize the pelvis and can sit in a good posture in a state in which the pelvis stands in a vertical direction with respect to the seating surface.

本発明者等は、着座者が、着座者の左右の臀部を、左右の着座部のそれぞれに分けて椅子に座ろうとする身体意識を高めることによって、着座者が、左右の座骨を中心とした臀部の二点を座面に接触させて座るようになり、着座者の姿勢がよくなることを知見した。
かかる知見に基づき、本発明の椅子は、請求項１記載の通り、着座者に対して少なくとも左右に分かれている着座部を備え、前記着座部の水平座面に対して、前記着座部を少なくとも後傾かつ外傾に傾斜可能とする傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設けたことを特徴とする。
また、請求項２記載の椅子は、請求項１記載の椅子において、着座者が、着座者の膝を前記着座部の外方に向けて開脚可能となるように、膝から大腿部を支える前記着座部の前側部を、大腿部から臀部を支える前記着座部の後側部に対して小さくしたことを特徴とする。
また、請求項３記載の椅子は、請求項１又は２記載の椅子において、前記着座部の傾斜角度が、前記着座部の水平座面に対して前傾５度から後傾５度であり、外傾５度から内傾５度であることを特徴とする。
また、請求項４記載の椅子は、請求項１乃至３の何れかに記載の椅子において、前記椅子に背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けたことを特徴とする。 The inventors of the present invention improve the body consciousness that the seated person divides the right and left buttocks of the seated person into the right and left seated parts and sits on the chair, so that the seated person focuses on the left and right seat bones. It has been found that the position of the seated person is improved because the two points on the buttocks come into contact with the seating surface.
Based on such knowledge, the chair according to the present invention includes a seating portion that is divided into at least left and right with respect to a seated person, and the seating portion is at least the horizontal seating surface of the seating portion. Inclination means that can be inclined backward and outward and fixing means for fixing the seating portion at a desired inclination position are provided.
The chair according to claim 2 is the chair according to claim 1, wherein the seating person can open the leg from the knee so that the knee of the seating person can be opened outwardly of the seating part. The front side portion of the seating portion to be supported is made smaller than the rear side portion of the seating portion that supports the buttocks from the thigh.
The chair according to claim 3 is the chair according to claim 1 or 2, wherein the inclination angle of the seating part is 5 degrees forward to 5 degrees backward with respect to the horizontal seating surface of the seating part, It is characterized in that the inclination is 5 degrees outward to 5 degrees inward.
The chair according to claim 4 is the chair according to any one of claims 1 to 3, wherein a backrest portion is provided on the chair, and a vertically moving means for moving the backrest portion up and down is provided. Features.

本発明の椅子は、着座者が、着座者に対して少なくとも左右に分かれた着座部を認識することによって、一方の着座部に左の臀部を載せ、他方の着座部に右の臀部を載せて着座しようとする着座者の身体意識が高まる。着座者が、着座者の座骨を左右に分かれた着座部に対応させて、左右の座骨を中心とした臀部の二点を座面に接触させて、骨盤を座面に対して垂直方向に立たたせるような状態で座るようになる。このため、着座者の背骨が自然と伸び、姿勢よく椅子に座ることができる。
また、着座者が左右に分かれた着座部を認識しただけでは、着座者の背骨が伸びるように、姿勢よく椅子に座ることができない場合がある。このため、本発明の椅子には、前記着座部の水平座面に対して、前記着座部を少なくとも後傾かつ外傾に傾斜可能とする傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設けている。前記着座部を後傾かつ外傾に傾斜させ、この傾斜位置で固定した場合、着座者が、一方の着座部と他方の着座部に跨るように、自然に膝を着座部の外方に向けて開脚させて座るようになり、左右の座骨を中心とした臀部の二点を、分かれた着座部のそれぞれの座面に接触させて座るようになる。このため、着座者が、骨盤を座面に対して垂直方向に立たたせるような状態で、骨盤を安定させて座るようになり、自然に背骨を真っ直ぐに伸ばした状態で、姿勢よく椅子に座ることができるようになる。
また、本発明の椅子において、膝から大腿部の部分を支持する前記着座部の前側部を、大腿部から臀部を支持する前記着座部の後側部に対して小さくした場合は、着座者が着座者の膝を前記着座部の外方に向けて開脚しやすくなる。このため、着座者が無理なく楽に、左右の座骨を中心とした臀部の二点を座面に接触させて、座ることができるようになる。
また、本発明の椅子に、背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けた場合は、着座者の背骨を、着座者のへその位置に合せて背凭れ部で支えることができ、着座者が、無理なく楽に、背骨を伸ばした姿勢を維持しやすくなる。 In the chair according to the present invention, the seat occupant recognizes the seat part divided at least on the left and right with respect to the seat occupant, so that the left buttock is placed on one seating part and the right buttock is placed on the other seating part. The body consciousness of the seated person who is going to sit up increases. A seated person makes the seat bone of the seated person correspond to the seating part divided into the left and right, the two points of the buttocks centering on the left and right seating bones are brought into contact with the seating surface, and the pelvis stands vertically to the seating surface. Sit in a state where you can rest. For this reason, a seated person's spine extends naturally and it can sit on a chair with a good posture.
Moreover, if the seated person only recognizes the seating part divided into left and right, the seated person may not be able to sit on the chair in a good posture so that the spine of the seated person extends. For this reason, in the chair of the present invention, with respect to the horizontal seating surface of the seating portion, the seating portion can be tilted at least backward and outward, and the seating portion is fixed at a desired tilting position. Fixing means is provided. When the seating part is tilted backward and outward and fixed at this tilted position, the seated person naturally faces the outside of the seating part so as to straddle one seating part and the other seating part. Then, it sits with its legs open, and the two points of the buttocks centered on the left and right seat bones come into contact with the respective seating surfaces of the separated seats. For this reason, the seated person can sit in a stable posture with the pelvis standing in a vertical direction with respect to the seating surface, and sits in a chair with a good posture in a state where the spine is naturally straightened. Will be able to.
In the chair of the present invention, when the front side portion of the seating portion that supports the thigh portion from the knee is made smaller than the rear side portion of the seating portion that supports the buttocks from the thigh portion, It becomes easy for a person to open his / her leg with the knee of the seated person facing outward. For this reason, the seated person can sit comfortably and comfortably by bringing the two points of the buttocks centering on the left and right seat bones into contact with the seating surface.
Further, when the chair of the present invention is provided with a backrest portion and provided with a vertically moving means for moving the backrest portion up and down, the backrest portion of the seated person is aligned with the position of the seated person's navel. This makes it easier for a seated person to maintain a posture in which the spine is stretched out easily and comfortably.

本発明の椅子の一実施の形態を図面に基づき説明する。図１は、本発明の椅子１の一実施の形態を示す正面図、図２は、図１の椅子の平面図、図３は、図１の椅子の側面図である。本発明の椅子１は、図１から図３に示すように、着座者に対して左右に二分割された着座部３ａ，３ｂを備えている。
左右に二分割された一対の着座部３ａ，３ｂは、台座５に設置された一対の脚部４ａ，４ｂで支持されている。左右の脚部４ａ，４ｂの間には、支持部４５が設けられている。
前記脚部４ａ，４ｂは、フレーム４１ａ，４１ｂと、フレーム４１ａ，４１ｂに嵌合されて上下に移動可能となる支柱部４２ａ，４２ｂとから構成されている。前記支柱部部４２ａ，４２ｂの先端部にはボールジョイント４３ａ，４３ｂを設けている。また、フレーム４１ａ，４１ｂには、脚用固定部材４４ａ，４４ｂを設けている。脚用固定部材４４ａ，４４ｂを緩めて、支柱部４２ａ，４２ｂを上下に移動させ、所望の位置で支柱部４２ａ，４２ｂを脚用固定部材４４ａ，４４ｂで締め付けて固定させる。尚、椅子の脚部を上下に移動させる手段として、油圧シリンダーやガスシリンダー等を用いてもよい。 One embodiment of a chair of the present invention is described based on a drawing. 1 is a front view showing an embodiment of a chair 1 of the present invention, FIG. 2 is a plan view of the chair of FIG. 1, and FIG. 3 is a side view of the chair of FIG. As shown in FIGS. 1 to 3, the chair 1 of the present invention includes seating portions 3 a and 3 b that are divided into left and right sides with respect to a seated person.
The pair of seating portions 3 a and 3 b divided into the left and right are supported by a pair of leg portions 4 a and 4 b installed on the base 5. A support portion 45 is provided between the left and right leg portions 4a and 4b.
The leg portions 4a and 4b are composed of frames 41a and 41b and support columns 42a and 42b that are fitted to the frames 41a and 41b and can be moved up and down. Ball joints 43a and 43b are provided at the front ends of the support portions 42a and 42b. The frames 41a and 41b are provided with leg fixing members 44a and 44b. The leg fixing members 44a and 44b are loosened, the column parts 42a and 42b are moved up and down, and the column parts 42a and 42b are fastened and fixed at the desired positions by the leg fixing members 44a and 44b. A hydraulic cylinder, a gas cylinder, or the like may be used as means for moving the chair leg up and down.

着座部３ａ，３ｂの裏面には、傾斜用部材２を設けている。傾斜用部材２は、着座部３ａ，３ｂを支持する二本の棒状部材からなる支持部２２と、この支持部２２の中央部分に設けたボールジョイント４３ａ，４３ｂを嵌合させる受部２１とからなっている。
支柱部４２ａ，４２ｂの先端に設けられたボールジョイント４３ａ，４３ｂを、着座部３ａ，３ｂの裏面に設けられた傾斜用部材２の受部２１に嵌合し、脚部４ａ，４ｂと着座部３ａ，３ｂを接続する。
受部２１には、着座部３ａ，３ｂを所望の傾斜位置で固定させる傾斜用固定部材２３を設けている。例えば、ボールジョイントを締め付けるネジ状の傾斜用固定部材２３を用いて、傾斜用固定部材２３を緩めることにより、受部２１に嵌合させたボールジョイント４３ａ，４３ｂに沿って着座部３ａ，３ｂを傾斜させる。そして、着座部３ａ，３ｂを前側、後側、外側、内側に傾斜させ、所望の傾斜位置で傾斜用固定部材２３を締め付けて、着座部３ａ，３ｂを固定させることができる。尚、傾斜手段としては、板バネ等の他の傾斜手段を用いて、着座部３ａ，３ｂを少なくとも、後傾かつ外傾に傾斜可能となるようしてもよい。
尚、着座部の前側とは、着座者が着座部に座った場合に、着座者の膝から下腿部を支える部分をいい、着座部の後側とは、着座者の下腿部から臀部を支持する部分をいう。また、着座部の内側とは、着座者に対して左右に分けられた着座部の中心部分をいい、着座部の外側とは、椅子の外方部分をいう。 An inclination member 2 is provided on the back surface of the seating portions 3a and 3b. The tilting member 2 includes a support portion 22 made of two rod-like members that support the seating portions 3a and 3b, and a receiving portion 21 into which the ball joints 43a and 43b provided at the central portion of the support portion 22 are fitted. It has become.
The ball joints 43a and 43b provided at the front ends of the column portions 42a and 42b are fitted into the receiving portions 21 of the tilting member 2 provided on the back surfaces of the seating portions 3a and 3b, and the leg portions 4a and 4b and the seating portions are fitted. 3a and 3b are connected.
The receiving portion 21 is provided with an inclination fixing member 23 for fixing the seating portions 3a and 3b at desired inclination positions. For example, by using the screw-like tilting fixing member 23 that tightens the ball joint, the tilting fixing member 23 is loosened, so that the seating portions 3a and 3b are moved along the ball joints 43a and 43b fitted to the receiving portion 21. Tilt. The seat portions 3a and 3b can be fixed by inclining the seat portions 3a and 3b forward, rear, outside, and inside, and fastening the tilt fixing member 23 at a desired tilt position. As the tilting means, other tilting means such as a leaf spring may be used so that the seating portions 3a and 3b can be tilted at least backward and outward.
The front side of the seating part refers to a part that supports the lower leg from the knee of the seated person when the seated person sits on the seating part, and the rear side of the seating part refers to the buttocks from the lower leg part of the seated person The part that supports Further, the inside of the seating portion refers to the central portion of the seating portion that is divided into left and right with respect to the seated person, and the outside of the seating portion refers to the outer portion of the chair.

図２の平面図に示すように、着座部３ａ，３ｂは、着座者が、着座者の膝を着座部３ａ，３ｂの外方に向けて開脚しやすように、着座者の膝から大腿部を支える着座部３ａ，３ｂの前側部３１ａ，３１ｂを、着座者の大腿部から臀部を支える着座部３ａ，３ｂの後側部３２ａ，３２ｂに対して小さくしている。尚、本実施の形態において、着座部３ａ，３ｂの前側部３１ａ，３１ｂとは、着座部３ａ，３ｂのボールジョイント４３ａ，４３ｂ位置で左右に仮想の横線を引いた場合に、前記仮想横線よりも前側の部分をいう。また、着座部３ａ，３ｂの後側部３２ａ，３２ｂとは、前記仮想横線よりも後側の部分をいう。そして、前側部３１ａ，３１ｂの面積を、後側部３２ａ，３２ｂの面積よりも小さくなるようにする。   As shown in the plan view of FIG. 2, the seating portions 3a and 3b are large from the seated person's knee so that the seated person can easily open the leg toward the outside of the seating portion 3a and 3b. The front side portions 31a and 31b of the sitting portions 3a and 3b that support the thighs are made smaller than the rear side portions 32a and 32b that support the buttocks from the thighs of the seated person. In the present embodiment, the front side portions 31a and 31b of the seating portions 3a and 3b refer to the virtual horizontal lines when a horizontal horizontal line is drawn to the left and right at the ball joints 43a and 43b positions of the seating portions 3a and 3b. Also refers to the front part. Further, the rear side portions 32a and 32b of the seating portions 3a and 3b are portions on the rear side of the virtual horizontal line. The areas of the front side portions 31a and 31b are made smaller than the areas of the rear side portions 32a and 32b.

台座５は、４本の台座用脚部５ａ，５ｂ，５ｄ，５ｅを平面Ｘ字状に一点で集結させ、平面Ｘ字状の交差点から１本の台座用脚部５ｃを着座部３ａの後端部よりも後側に突出させるように設けている。着座者に対して後側の台座用脚部５ｂ，５ｃ，５ｄは、着座者に対して前側の台座用脚部５ａ，５ｅよりも、長さが長くなっている。また、着座部３ａ，３ｂを支える脚部４ａ，４ｂは、台座用脚部５ａ，５ｂ，５ｃ，５ｄ，５ｅの交差点よりも後側に左右に開いた台座用脚部５ｂ，５ｄに立設されている。
着座者の体重が、着座部３ａ，３ｂの後側部３２ａ，３２ｂにかけられた場合であっても、後側の台座用脚部５ｂ，５ｃ，５ｄの長さが、前側の台座用脚部５ａ，５ｅよりも長くなるように構成されているため、着座者を安全に支えることができる。台座５を構成する台座用脚部５ａ，５ｂ，５ｃ，５ｄ，５ｅの先端部には、椅子１を移動させやすくするために、それぞれキャスタ５１ａ，５１ｂ，５１ｃ，５１ｄ，５１ｅが設けられている。尚、台座用脚部には、キャスタを設けなくてもよい。 The pedestal 5 gathers four pedestal legs 5a, 5b, 5d, 5e into a plane X shape at one point, and connects the pedestal leg 5c from the plane X shape intersection to the rear of the seat portion 3a. It is provided so as to protrude rearward from the end. The pedestal legs 5b, 5c, 5d on the rear side with respect to the seated person are longer than the pedestal legs 5a, 5e on the front side with respect to the seated person. The leg portions 4a and 4b that support the seat portions 3a and 3b are erected on pedestal legs 5b and 5d that are opened to the left and right behind the intersection of the pedestal legs 5a, 5b, 5c, 5d, and 5e. Has been.
Even when the weight of the seated person is applied to the rear side parts 32a and 32b of the seating parts 3a and 3b, the length of the rear base leg parts 5b, 5c and 5d is equal to the length of the front base leg part. Since it is comprised so that it may become longer than 5a, 5e, a seated person can be supported safely. Casters 51a, 51b, 51c, 51d, and 51e are provided at the distal ends of the pedestal legs 5a, 5b, 5c, 5d, and 5e constituting the pedestal 5 in order to make the chair 1 easier to move. . In addition, it is not necessary to provide a caster in the pedestal leg.

台座５の台座用脚部５ａ，５ｂ，５ｃ，５ｄ，５ｅの交差点からは、上方斜めに突出する背凭れ用脚部６を設け、この背凭れ用脚部６の先端部には、バー状の背凭れ部７を設けている。
前記背凭れ用脚部６は、フレーム６１と、フレーム６１に嵌合されて上下に移動可能となる支柱部６２とから構成されている。また、フレーム６１には、上下移動させた支柱部６２を所望位置で固定する背凭れ用固定部材６３を設けている。尚、油圧シリンダーやガスシリンダー等を背凭れ用脚部６に用いて背凭れ部７を上下に移動可能としてもよい。 From the intersection of the base legs 5a, 5b, 5c, 5d, and 5e of the base 5, a backrest leg 6 that protrudes obliquely upward is provided, and a bar-like shape is provided at the tip of the backrest leg 6. The backrest part 7 is provided.
The said backrest leg part 6 is comprised from the flame | frame 61 and the support | pillar part 62 which is fitted to the frame 61 and can move up and down. Further, the frame 61 is provided with a backrest fixing member 63 for fixing the strut 62 moved up and down at a desired position. A backrest 7 may be moved up and down by using a hydraulic cylinder, a gas cylinder or the like for the backrest 6.

着座者は、椅子１の着座部３ａ，３ｂが左右に二分割されていることを認識することによって、一方の着座部に左の臀部を載せ、他方の着座部に右の臀部を載せて着座しようとする身体意識が高まる。このため、着座者は、左右に分かれた着座部に対応させて、左右の座骨を中心とした臀部の二点を、二分割された着座部３ａ，３ｂのそれぞれの座面に接触させて座るようになる。このため、着座者は、骨盤を座面に対して垂直方向に立たたせるような状態で座るようになり、着座者の背骨が自然と伸び、姿勢よく椅子に座ることができる。
尚、本実施の形態においては、着座者が、着座部が左右に分かれていることを、確実に認識できるように、左右に二分割されている着座部３ａ，３ｂを示したが、着座部を左右に分けるには、着座部を他の形態としてもよい。例えば、着座者が、着座部が左右に分かれていることを視覚的に認識できるように、着座部の中央に、前側から後側にわたって一本の線を引くことにより、着座部を着座者に対して左右に分けてもよい。また、例えば、着座者に対して左右の着座部の色を変えることにより、着座部を左右に分けてもよい。更には、着座時に、着座者がそれぞれの着座部３ａ，３ｂを感覚として認識できるように、例えば、左右に分かれた２つの凸面を座面上に形成し、左右に分かれた着座部としてもよい。 The seated person recognizes that the seating portions 3a and 3b of the chair 1 are divided into left and right parts, so that the left seat is placed on one seating portion and the right seat is placed on the other seating portion. The body consciousness to try increases. For this reason, the seated person sits in contact with the seating surfaces of the seats 3a and 3b divided into two, with the two points of the hips centering on the left and right seat bones corresponding to the seating parts separated on the left and right. It becomes like this. For this reason, the seated person comes to sit in a state in which the pelvis stands in a direction perpendicular to the seating surface, and the seated person's spine can naturally stretch and sit in a chair with good posture.
In the present embodiment, the sitting portions 3a and 3b divided into left and right are shown so that the seated person can surely recognize that the sitting portion is divided into left and right. In order to divide the left and right, the seating portion may have other forms. For example, by drawing a single line from the front side to the rear side in the center of the seating part so that the seating person can visually recognize that the seating part is divided into left and right, On the other hand, it may be divided into left and right. Further, for example, the seating portions may be divided into left and right by changing the colors of the left and right seating portions with respect to the seated person. Furthermore, for example, two convex surfaces divided on the left and right may be formed on the seating surface so that the seated person can recognize each of the sitting portions 3a and 3b as a sensation at the time of sitting. .

図４は、着座部３ａ，３ｂを後傾かつ外傾に傾斜させた状態を示す椅子１の側面図である。また、図５は、着座部３ａ，３ｂを後傾かつ外傾に傾斜させた状態を示す椅子１の正面図である。図５に示すように、着座部３ａ，３ｂを後傾かつ外傾に傾斜させると、正面から見た場合に、着座部３ａ，３ｂは、左右に分けている部分を中心として、この中心部分が凸状の山形形状となっている。
着座者が、椅子１の着座部３ａ，３ｂが二分割されていることを認識するだけでは、着座者の姿勢がよくならない場合は、着座部３ａ，３ｂを、着座部３ａ，３ｂの水平座面に対して、後傾かつ外傾に傾斜させる。着座者は、後傾かつ外傾に傾斜している着座部に座りやすいように、一方の着座部３ａと他方の着座部３ｂに跨って、自然に膝を着座部３ａ，３ｂの外方に向けて両足を左右に開脚して座るようになる（図６参照）。このため、一方の着座部３ａの座面が、着座者の右の座骨を中心とした右臀部に接触し、他方の着座部３ｂの座面が、着座者の左の座骨を中心とした左臀部に接触するようになる。このように、着座者が、左右の座骨を中心とした左右の臀部の二点を着座部３ａ，３ｂの座面に接触させて座るようになる。このため、着座者が、骨盤を座面に対して垂直方向に立たせるような状態で、骨盤を安定させて座るようになり、自然に背骨を真っ直ぐに伸ばした状態で、姿勢よく椅子に座ることができる。 FIG. 4 is a side view of the chair 1 showing a state in which the seating portions 3a and 3b are inclined backward and outward. FIG. 5 is a front view of the chair 1 showing a state in which the seating portions 3a and 3b are inclined backward and outward. As shown in FIG. 5, when the seating portions 3a and 3b are tilted backward and outward, the seat portions 3a and 3b are centered on the left and right portions when viewed from the front. Has a convex chevron shape.
If the seated person does not improve his / her posture simply by recognizing that the seating parts 3a and 3b of the chair 1 are divided into two parts, the seating parts 3a and 3b are placed on the horizontal seats of the seating parts 3a and 3b. Tilt backward and outward with respect to the surface. A seated person naturally sits on one seat 3a and the other seat 3b so that the knee is outside the seats 3a and 3b so that the seat can easily sit on the seat tilted backward and outward. The two legs are seated with their legs open to the left and right (see FIG. 6). For this reason, the seating surface of one seating portion 3a comes into contact with the starboard portion centered on the seater's right seatbone, and the seating surface of the other seating portion 3b is leftward centered on the seater's left seatbone. It comes in contact with the buttocks. In this way, the seated person sits in contact with the seating surfaces of the seating portions 3a and 3b at the two points of the left and right buttocks centered on the left and right seat bones. For this reason, a seated person can sit in a stable posture with the pelvis standing in a vertical direction with respect to the seating surface, and sits in a chair with a good posture with the spine straightened naturally. be able to.

また、着座部３ａ，３ｂの前側部３１ａ，３１ｂを、着座部３ａ，３ｂの後側部３２ａ，３２ｂよりも小さくすると、着座者が、膝を外方に向けて開脚して座りやすくなる。このため、左右の座骨を中心とした左右の臀部の二点を着座部３ａ，３ｂの座面に接触させやすくなり、着座者が骨盤を安定させて、姿勢よく座ることができるようになる。
前記着座部の傾斜角度が、前記着座部の水平座面に対して前傾５度から後傾５度であり、外傾５度から内傾５度とした場合は、着座者の体型に合わせて、着座部３ａ，３ｂの座面を、着座者の座骨中心とした左右の臀部に接触させるように調整できるため、好ましい。 Further, if the front side portions 31a and 31b of the seating portions 3a and 3b are made smaller than the rear side portions 32a and 32b of the seating portions 3a and 3b, the seated person can easily sit down with their knees facing outward. . For this reason, the two points of the left and right buttocks centering on the left and right seat bones can be easily brought into contact with the seating surfaces of the seating portions 3a and 3b, and the seated person can stabilize the pelvis and sit in a good posture.
When the inclination angle of the seating part is 5 degrees forward to 5 degrees backward with respect to the horizontal seating surface of the seating part, and 5 degrees outward to 5 degrees inward, it matches the body shape of the seated person. Thus, the seating surfaces of the seating portions 3a and 3b can be adjusted so as to come into contact with the left and right buttocks centered on the seatbone of the seated person, which is preferable.

次に、本発明の椅子に着座者が着座した場合の実施例について説明する。
図７（ａ）は、着座部が一つである通常の椅子に着座者が着座した場合に、着座してから１０分後の着座者の姿勢を、三次元計測装置を使用して計測した結果である。また、図７（ｂ）は、本発明の椅子に着座者が着座した場合に、着座してから１０分後の着座者の姿勢を、三次元計測装置を使用して計測した結果である。
図７（ａ）に示すように、着座部が一つである通常の椅子に、着座者が着座した場合は、着座者の背骨が丸く曲がった前屈みの状態で着座していることが確認できた。
これに対し、図７（ｂ）に示すように、着座部が左右に分かれた本発明の椅子に、着座者が着座した場合は、着座者の背骨が真っ直ぐに伸びた、姿勢のよい状態で着座していることが確認できた。 Next, an embodiment when a seated person is seated on the chair of the present invention will be described.
FIG. 7A shows a case where a seated person is seated on a normal chair having a single seating portion, and the posture of the seated person 10 minutes after sitting is measured using a three-dimensional measuring device. It is a result. Moreover, FIG.7 (b) is the result of having measured the attitude | position of the seated person 10 minutes after sitting down using the three-dimensional measuring device, when the seated person sits down on the chair of this invention.
As shown in FIG. 7 (a), when a seated person sits on a normal chair with a single seating section, it can be confirmed that the seated person is seated in a bent state with the spine of the seated person bent round. It was.
On the other hand, as shown in FIG. 7 (b), when the seated person sits on the chair of the present invention in which the seating part is divided into left and right, the backbone of the seated person is straight and the posture is good. I was able to confirm that I was seated.

次に、本発明の椅子に着座者が着座した場合の筋肉の状態を、着座者の筋放電の数値を測定することによって確認した。
図８中、Ａ線に示すように、着座部が左右に分かれた本発明の椅子に着座した着座時、１５分後、３０分後の着座者の筋放電の数値を示している。図８中、Ｂ線は、着座部が一つである通常の椅子に着座した着座時、１５分後、３０分後の着座者の筋放電の数値を示している。尚、筋放電の数値が高い程、筋肉が緊張している状態を示す。
図８中、Ａ線に示すように、着座部が左右に分かれた本発明の椅子に、着座者が着座した場合は、着座時から、通常の椅子に着座した場合と比較して、着座者の筋放電の値が低く、着座してから３０分経過した後にも、着座者の筋放電の値が低い状態が持続されている。図８中、Ａ線で示す結果から、本発明の椅子に着座した着座者は、着座部が一つの通常の椅子と比較して、筋肉が緊張しておらず、筋肉に負担をかけることなく、リラックスした状態で着座していることが確認できた。
これに対し、図８中、Ｂ線に示すように、着座部が一つである通常の椅子に、着座者が着座した場合は、着座時から、筋放電の値が高く、筋肉が緊張している状態となっている。 Next, the state of the muscle when the occupant sat on the chair of the present invention was confirmed by measuring the numerical value of the muscular discharge of the occupant.
As shown in line A in FIG. 8, the numerical values of the muscle discharge of the seated person after 15 minutes and 30 minutes after sitting on the chair of the present invention in which the seating part is divided into left and right are shown. In FIG. 8, line B shows the muscle discharge value of the seated person 15 minutes and 30 minutes after sitting on a normal chair with one seating part. In addition, the state where the muscle is tense is shown, so that the numerical value of the muscle discharge is high.
As shown in line A in FIG. 8, when a seated person is seated on the chair of the present invention in which the seating portion is divided into left and right, the seated person is compared with the case of sitting on a normal chair from the time of sitting. The value of myoelectric discharge is low, and even after 30 minutes have passed since sitting, the state of the muscle discharge of the seated person is low. From the result shown by line A in FIG. 8, the seated person sitting on the chair of the present invention is not strained in muscles and places no burden on the muscles compared to a normal chair with a single seating section. I was able to confirm that I was sitting relaxed.
On the other hand, as shown by line B in FIG. 8, when a seated person sits on a normal chair having a single seating section, the value of muscle discharge is high and muscles are tense from the time of sitting. It is in the state.

また、本発明の椅子に着座者が座った場合に、着座者の心拍数を測定し、着座者がどのような状態となっているかを確認した。
図９中、Ａ線は、着座部が左右に分かれた本発明の椅子に着座した着座時、１５分後、３０分後の着座者の心拍数の変化を示す心拍変動（ＨＦ／ＬＦ）の数値を示している。図９中、Ｂ線は、着座部が一つである通常の椅子に着座した着座時、１５分後、３０分後の着座者の心拍数の変化を示す心拍変動（ＨＦ／ＬＦ）の数値を示している。尚、心拍変動の数値が高い程、精神的なストレスが少なく、精神的に安定な状態を示す。
図９中、Ａ線に示すように、着座部が左右に分かれた本発明の椅子に、着座者が着座した場合は、着座時から、通常の椅子に着座した場合と比較して、心拍変動の数値が高く、着座者に精神的なストレスかかっていない状態となることが確認できた。更に、本発明の椅子に着座して３０分後には、着座者の心拍変動の数値がかなり高くなり、本発明の椅子に長く着座しているほど、着座者のストレスが少なくなり、着座者が精神的に安定した状態となることが確認できた。
これに対し、図９中、Ｂ線に示すように、着座部が一つである通常の椅子に、着座者が着座した場合は、着座時から、心拍変動の数値が低く、本発明の椅子に着座した場合と比較して、精神的にストレスがかかり、精神的に安定していないことが確認できた。
以上のように、本発明の椅子は、着座者が精神的に安定し、リラックスした状態で着座することができることが確認できた。このため、本発明の椅子は、家庭、学校等の教育施設又は職場で用いる椅子として適している。 Moreover, when a seated person sat down on the chair of the present invention, the heart rate of the seated person was measured, and the state of the seated person was confirmed.
In FIG. 9, line A represents the heart rate variability (HF / LF) indicating the change in the heart rate of the seated person 15 minutes and 30 minutes after sitting on the chair of the present invention in which the seating part is divided into left and right. Numerical values are shown. In FIG. 9, line B represents a heart rate variability (HF / LF) value indicating a change in the heart rate of the seated person 15 minutes and 30 minutes after sitting in a normal chair with a single seating part. Is shown. Note that the higher the value of the heart rate variability, the less the mental stress and the mentally stable state.
In FIG. 9, when the seated person is seated on the chair of the present invention in which the seating portion is divided into left and right as shown by line A, heart rate variability is compared with the case of sitting on a normal chair from the time of sitting. It was confirmed that there was no mental stress on the seated person. Further, 30 minutes after sitting on the chair of the present invention, the numerical value of the heart rate variability of the seated person becomes considerably high, and the longer the person sits on the chair of the present invention, the less the stress of the seated person, It was confirmed that it became a mentally stable state.
On the other hand, as shown by line B in FIG. 9, when a seated person sits on a normal chair having a single seating portion, the heart rate variability is low from the time of sitting, and the chair of the present invention. Compared to the case of being seated on the body, it was confirmed that it was mentally stressed and not mentally stable.
As described above, it was confirmed that the chair of the present invention can be seated in a relaxed state where the seated person is mentally stable. For this reason, the chair of this invention is suitable as a chair used in educational facilities, such as a home and a school, or a workplace.

本発明の椅子の正面図Front view of the chair of the present invention 本発明の椅子の平面図Plan view of the chair of the present invention 本発明の椅子の側面図Side view of the chair of the present invention 本発明の椅子の着座部を後傾かつ外傾に傾斜させた状態を示す側面図The side view which shows the state which inclined the seating part of the chair of this invention backward and outwardly 本発明の椅子の着座部を後傾かつ外傾に傾斜させた状態を示す正面図The front view which shows the state which inclined the seating part of the chair of this invention backward and outwardly 図４又は図５に示す椅子に着座者が着座した状態を示す説明図Explanatory drawing which shows the state where the seated person sat down on the chair shown in FIG. 4 or FIG. （ａ）通常の椅子に着座した後１０分後の着座者の姿勢を、三次元計測装置を用いて測定した図、（ｂ）本発明の椅子に着座した後１０分後の着座者の姿勢を、三次元計測装置を用いて測定した図(A) The figure which measured the attitude | position of the seated person 10 minutes after sitting on the normal chair using the three-dimensional measuring device, (b) The position of the seated person 10 minutes after sitting on the chair of the present invention Figure measured using a three-dimensional measuring device 本発明の椅子に着座した着座者の筋放電の値と、通常の椅子に着座した着座者の筋放電の値を示す図The figure which shows the value of the muscle discharge of the seated person seated on the chair of this invention, and the value of the muscle discharge of the seated person seated on the normal chair 本発明の椅子に着座した着座者の心拍変動の値と、通常の椅子に着座した着座者の心拍変動の値を示す図The figure which shows the value of the heart rate variability of the seated person seated on the chair of the present invention and the value of the heart rate variability of the seated person seated on the normal chair

符号の説明Explanation of symbols

１ 椅子
２ 傾斜用部材
３ａ，３ｂ 着座部
４ａ，４ｂ 脚部
５ 台座
５ａ，５ｂ，５ｃ，５ｄ，５ｅ 台座用脚部
６ 背凭れ用脚部
７ 背凭れ部
２１ 支持部
２２ 受部
２３ 傾斜用固定部材
３１ａ，３１ｂ 着座部の前側部
３２ａ，３２ｂ 着座部の後側部
４１ａ，４１ｂ フレーム
４２ａ，４２ｂ 支柱部
４３ａ，４３ｂ ボールジョイント
４４ａ，４４ｂ 脚用固定部材
４５ 支持部
５１ａ，５１ｂ，５１ｃ，５１ｄ，５１ｅ キャスタ
６１ フレーム
６２ 支柱
６３ 背凭れ用固定部材
DESCRIPTION OF SYMBOLS 1 Chair 2 Inclination member 3a, 3b Seat part 4a, 4b Leg part 5 Base 5a, 5b, 5c, 5d, 5e Base leg part 6 Backrest leg part 7 Backrest part 21 Support part 22 Reception part 23 For inclination Fixing member 31a, 31b Front side part of seating part 32a, 32b Rear side part of seating part 41a, 41b Frame 42a, 42b Posting part 43a, 43b Ball joint 44a, 44b Leg fixing member 45 Support part 51a, 51b, 51c, 51d , 51e Casters 61 Frame 62 Posts 63 Backrest fixing member

本発明者等は、着座者が、着座者の左右の臀部を、左右の着座部のそれぞれに分けて椅子に座ろうとする身体意識を高めることによって、着座者が、左右の座骨を中心とした臀部の二点を座面に接触させて座るようになり、着座者の姿勢がよくなることを知見した。
かかる知見に基づき、本発明の椅子は、請求項１記載の通り、着座者に対して少なくとも左右に分かれている着座部を備え、前記着座部の水平座面に対して、前記着座部を左右に分けている部分を中心として、正面から見てこの中心部分が凸状の山形形状となるように外傾に傾斜させる傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設けたことを特徴とする。
また、請求項２記載の椅子は、請求項１記載の椅子において、着座者が、着座者の膝を前記着座部の外方に向けて開脚可能となるように、膝から大腿部を支える前記着座部の前側部を、大腿部から臀部を支える前記着座部の後側部に対して小さくしたことを特徴とする。
また、請求項３記載の椅子は、請求項１又は２記載の椅子において、前記着座部の傾斜角度が、前記着座部の水平座面に対して前傾５度から後傾５度であり、外傾５度から内傾５度であることを特徴とする。
また、請求項４記載の椅子は、請求項１乃至３の何れかに記載の椅子において、前記椅子に背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けたことを特徴とする。 The inventors of the present invention improve the body consciousness that the seated person divides the right and left buttocks of the seated person into the right and left seated parts and sits on the chair, so that the seated person focuses on the left and right seat bones. It has been found that the position of the seated person is improved because the two points on the buttocks come into contact with the seating surface.
Based on this knowledge, the chair according to the present invention includes a seating portion that is divided into at least left and right with respect to a seated person as set forth in claim 1, and the seating portion is moved to the left and right with respect to the horizontal seating surface of the seating portion. Inclining means for inclining outward so that the central part has a convex chevron shape when viewed from the front, and fixing means for fixing the seating portion at a desired inclination position are provided. It is characterized by that.
The chair according to claim 2 is the chair according to claim 1, wherein the seating person can open the leg from the knee so that the knee of the seating person can be opened outwardly of the seating part. The front side portion of the seating portion to be supported is made smaller than the rear side portion of the seating portion that supports the buttocks from the thigh.
The chair according to claim 3 is the chair according to claim 1 or 2, wherein the inclination angle of the seating part is 5 degrees forward to 5 degrees backward with respect to the horizontal seating surface of the seating part, It is characterized in that the inclination is 5 degrees outward to 5 degrees inward.
The chair according to claim 4 is the chair according to any one of claims 1 to 3, wherein a backrest portion is provided on the chair, and a vertically moving means for moving the backrest portion up and down is provided. Features.

本発明の椅子は、着座者が、着座者に対して少なくとも左右に分かれた着座部を認識することによって、一方の着座部に左の臀部を載せ、他方の着座部に右の臀部を載せて着座しようとする着座者の身体意識が高まる。着座者が、着座者の座骨を左右に分かれた着座部に対応させて、左右の座骨を中心とした臀部の二点を座面に接触させて、骨盤を座面に対して垂直方向に立たたせるような状態で座るようになる。このため、着座者の背骨が自然と伸び、姿勢よく椅子に座ることができる。
また、着座者が左右に分かれた着座部を認識しただけでは、着座者の背骨が伸びるように、姿勢よく椅子に座ることができない場合がある。このため、本発明の椅子には、前記着座部の水平座面に対して、前記着座部を少なくとも後傾かつ外傾に傾斜可能とする傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設けている。前記着座部を左右に分けている部分を中心として、正面から見てこの中心部分が凸状の山形形状となるように外傾に傾斜させ、この傾斜位置で固定した場合、着座者が、一方の着座部と他方の着座部に跨るように、自然に膝を着座部の外方に向けて開脚させて座るようになり、左右の座骨を中心とした臀部の二点を、分かれた着座部のそれぞれの座面に接触させて座るようになる。このため、着座者が、骨盤を座面に対して垂直方向に立たたせるような状態で、骨盤を安定させて座るようになり、自然に背骨を真っ直ぐに伸ばした状態で、姿勢よく椅子に座ることができるようになる。
また、本発明の椅子において、膝から大腿部の部分を支持する前記着座部の前側部を、大腿部から臀部を支持する前記着座部の後側部に対して小さくした場合は、着座者が着座者の膝を前記着座部の外方に向けて開脚しやすくなる。このため、着座者が無理なく楽に、左右の座骨を中心とした臀部の二点を座面に接触させて、座ることができるようになる。
また、本発明の椅子に、背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けた場合は、着座者の背骨を、着座者のへその位置に合せて背凭れ部で支えることができ、着座者が、無理なく楽に、背骨を伸ばした姿勢を維持しやすくなる。
In the chair according to the present invention, the seat occupant recognizes the seat part divided at least on the left and right with respect to the seat occupant, so that the left buttock is placed on one seating part and the right buttock is placed on the other seating part. The body consciousness of the seated person who is going to sit up increases. A seated person makes the seat bone of the seated person correspond to the seating part divided into the left and right, the two points of the buttocks centering on the left and right seating bones are brought into contact with the seating surface, and the pelvis stands vertically to the seating surface. Sit in a state where you can rest. For this reason, a seated person's spine extends naturally and it can sit on a chair with a good posture.
Moreover, if the seated person only recognizes the seating part divided into left and right, the seated person may not be able to sit on the chair in a good posture so that the spine of the seated person extends. For this reason, in the chair of the present invention, with respect to the horizontal seating surface of the seating portion, the seating portion can be tilted at least backward and outward, and the seating portion is fixed at a desired tilting position. Fixing means is provided. When the seating part is tilted outward so that the center part has a convex chevron shape when viewed from the front, and the seating part is fixed at this tilted position, The two seats are separated from each other, with the knees facing the outside of the seating section and the hips centered on the left and right seat bones. Sit in contact with each seating surface of the part. For this reason, the seated person can sit in a stable posture with the pelvis standing in a vertical direction with respect to the seating surface, and sits in a chair with a good posture in a state where the spine is naturally straightened. Will be able to.
In the chair of the present invention, when the front side portion of the seating portion that supports the thigh portion from the knee is made smaller than the rear side portion of the seating portion that supports the buttocks from the thigh portion, It becomes easy for a person to open his / her leg with the knee of the seated person facing outward. For this reason, the seated person can sit comfortably and comfortably by bringing the two points of the buttocks centering on the left and right seat bones into contact with the seating surface.
Further, when the chair of the present invention is provided with a backrest portion and provided with a vertically moving means for moving the backrest portion up and down, the backrest portion of the seated person is aligned with the position of the seated person's navel. This makes it easier for a seated person to maintain a posture in which the spine is stretched out easily and comfortably.

本発明者等は、着座者が、着座者の左右の臀部を、左右の着座部のそれぞれに分けて椅子に座ろうとする身体意識を高めることによって、着座者が、左右の座骨を中心とした臀部の二点を座面に接触させて座るようになり、着座者の姿勢がよくなることを知見した。
かかる知見に基づき、本発明の椅子は、請求項１記載の通り、着座者に対して少なくとも左右に分かれている着座部を備え、前記着座部の水平座面に対して、前記着座部を左右に分けている部分を中心として、正面から見てこの中心部分が凸状の山形形状となるように外傾に傾斜させる傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設け、前記着座者の膝を前記着座部の外方に向けて開脚可能となるように、膝から大腿部を支える前記着座部の前側部を、大腿部から臀部を支える前記着座部の後側部に対して小さくしたことを特徴とする。
また、請求項２記載の椅子は、請求項１に記載の椅子において、前記着座部の傾斜角度が、前記着座部の水平座面に対して前傾５度から後傾５度であり、外傾５度から内傾５度であることを特徴とする。
また、請求項３記載の椅子は、請求項１又は請求項２に記載の椅子において、前記椅子に背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けたことを特徴とする。
The inventors of the present invention improve the body consciousness that the seated person divides the right and left buttocks of the seated person into the right and left seated parts and sits on the chair, so that the seated person focuses on the left and right seat bones. It has been found that the position of the seated person is improved because the two points on the buttocks come into contact with the seating surface.
Based on this knowledge, the chair according to the present invention includes a seating portion that is divided into at least left and right with respect to a seated person as set forth in claim 1, and the seating portion is moved to the left and right with respect to the horizontal seating surface of the seating portion. Inclining means for inclining outward so that the central part has a convex chevron shape when viewed from the front, and fixing means for fixing the seating portion at a desired inclination position are provided. The front side portion of the seating portion that supports the thigh from the knee and the seat portion that supports the buttocks from the thigh so that the knee of the seated person can be opened toward the outside of the seating portion. It is characterized by being smaller than the rear side .
The chair according to claim 2 is the chair according to claim 1 , wherein the inclination angle of the seating portion is 5 degrees forward to 5 degrees backward with respect to the horizontal seating surface of the seating section. The inclination is 5 degrees to 5 degrees inward.
Further, the chair according to claim 3 is the chair according to claim 1 or 2 , wherein the chair is provided with a backrest portion, and a vertically moving means for moving the backrest portion up and down is provided. And

Claims (4)

着座者に対して少なくとも左右に分かれている着座部を備え、前記着座部の水平座面に対して、前記着座部を少なくとも後傾かつ外傾に傾斜可能とする傾斜手段と、前記着座部を所望の傾斜位置で固定する固定手段を設けたことを特徴とする椅子。   Inclining means that comprises a seating portion that is divided into at least left and right with respect to a seated person, and that can tilt the seating portion at least backward and outward with respect to a horizontal seating surface of the seating portion, and the seating portion. A chair provided with fixing means for fixing at a desired inclined position. 着座者が、着座者の膝を前記着座部の外方に向けて開脚可能となるように、膝から大腿部を支える前記着座部の前側部を、大腿部から臀部を支える前記着座部の後側部に対して小さくしたことを特徴とする請求項１記載の椅子。   The seating that supports the front side portion of the seating portion that supports the thigh from the knee and the hip portion that supports the buttocks so that the seated person can open the leg of the seating person with the knee facing the outside of the seating portion. The chair according to claim 1, wherein the chair is smaller than a rear side portion of the portion. 前記着座部の傾斜角度が、前記着座部の水平座面に対して前傾５度から後傾５度であり、外傾５度から内傾５度であることを特徴とする請求項１又は２記載の椅子。   The inclination angle of the seating part is from 5 degrees forward to 5 degrees backward with respect to the horizontal seating surface of the seating part, and from 5 degrees outward to 5 degrees inward. 2. The chair according to 2. 前記椅子に背凭れ部を設け、前記背凭れ部を上下に移動させる上下移動手段を設けたことを特徴とする請求項１乃至３の何れかに記載の椅子。
The chair according to any one of claims 1 to 3, wherein a backrest portion is provided on the chair, and a vertically moving means for moving the backrest portion up and down is provided.