JP4140934B2 - wheelchair - Google Patents

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Publication number
JP4140934B2
JP4140934B2 JP28996198A JP28996198A JP4140934B2 JP 4140934 B2 JP4140934 B2 JP 4140934B2 JP 28996198 A JP28996198 A JP 28996198A JP 28996198 A JP28996198 A JP 28996198A JP 4140934 B2 JP4140934 B2 JP 4140934B2
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Prior art keywords
front wheel
frame
vehicle body
body frame
wheel support
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JP28996198A
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JP2000079142A (en
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忠 井浦
良行 束村
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株式会社いうら
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Description

【0001】
【発明の属する技術分野】
本発明は、身体障害者や老人が使用するに適した車椅子に関するものである。
【0002】
【従来の技術】
従来から、車椅子使用者が長時間車椅子に乗車していても快適に過ごせるために背もたれフレームが後方へ回動する車椅子、すなわちリクライニング可能な車椅子が知られている。
【0003】
ところで、通常、車椅子などの着座姿勢は臀部に体圧が集中しているため、長時間座位を保つことが困難であった。そのため、前記リクライニング可能な車椅子が用いられ、背もたれフレームを後方に回動することにより、臀部にかかっていた体圧を背中に分散させる方法がとられていた。
【0004】
ところが、これらリクライニング可能な車椅子は前記背もたれフレームが、その下端部を座席フレームの後端部に回動自在に枢着したものであり、当然のことながら、座席フレームと背もたれフレームの屈曲点と、車椅子利用者の座位における腰部の屈曲点とがことなり、背もたれフレームを倒していくと、利用者の背中が背もたれフレームに対して腰側にずれ、逆に背もたれフレームを起こしていくと、利用者の背中が背もたれフレームに対して頭側にずれる。そのため、リクライニングを行う度に衣服の乱れを直したり、安定した姿勢に身体を移動させなければならなかった。
【0005】
【発明が解決しようとする課題】
本発明は上記問題点に鑑み、背もたれフレームを座面に対して後方に回動することなく、車体フレームを後方に傾倒させると前輪が下方に移動し、その位置を保持することで臀部に集中していた体圧を背中に分散することのできる車椅子を提供することを課題としている。
【0006】
【課題を解決するための手段】
本発明は上記課題を解決するために、次のようにした。すなわち、本発明の車椅子は、座席体(6)及び背もたれ(4)を付設した車体フレーム(1)と、該車体フレーム(1)の両側部に配設された左右一対の後輪(22),(22)及び前輪(23),(23)と、前記車体フレーム(1)の前方部に配設された脚受けフレーム(11)とを備えた車椅子において、前記脚受けフレーム(11)を回動自在に支持するとともに、該脚受けフレーム(11)の上昇位置及び下降位置を保持する保持手段(A)を設け、さらに前記前輪(23),(23)それぞれ前輪支軸(24),(24)に軸着し、該前輪支軸(24),(24)をそれぞれ前記車体フレーム(1)の前部で一端部を上下に離間して枢着した第1リンク(25)と第2リンク(26)の他端部に枢着することにより、前記前輪(23),(23)が車体フレーム(1)に対し上下に移動可能に構成され、該前輪(23),(23)の上昇位置及び下降位置を保持する保持手段(B)を設けるに、前記保持手段(A)は脚受けフレーム(11)の中間部に枢着した略L字状の孔部を備えた支持プレート(14)と車体フレーム(1)に固着した軸体(15)とからなり、前記軸体(15)と前記孔部との係合によって前記脚受けフレーム(11)を保持するよう構成し、前記保持手段(B)を前輪支軸(24),(24)が上方位置にあるとき車体フレーム(1)に固着したストッパ体(29),(29)が前記前輪支軸(24),(24)上端部に接当し、前輪支軸(24),(24)が下方位置にあるとき車体フレーム(1)に回動自在に取り付けたストッパ体(31),(31)が前記前輪支軸(24),(24)上端部に接当し、それぞれの位置で前記前輪(23),(23)を保持するよう構成した。
【0007】
また、車体フレーム(1)前方下部に前後方向回動自在に軸受体(32),(32)を枢着し、該軸受体(32),(32)に上下に摺動可能な前輪支軸(24),(24)を挿通し、該前輪支軸(24),(24)の下端部に前輪(23),(23)を軸着して前記前輪(23),(23)を上下に移動可能に構成した。
【0008】
【作用】
この車椅子は、一般的な車椅子と同様に折りたたみ可能であるとともに、通常は自走式の車椅子として使用できる。
【0009】
使用者が通常の着座姿勢から楽な姿勢をとる場合には、脚受けフレーム(11)を上方へ回動させる。そして、脚受けフレーム(11)が上昇位置に達し、さらに脚受けフレーム(11)を上方へ持ち上げると車体フレーム(1)が後輪(22),(22)の軸心を中心として後方に傾倒する。この時、車体フレーム(1)に対して上下に移動可能に取り付けた前輪(23),(23)が自重により下方に移動し、その位置を保持手段(B)で保持する。この状態でこの車椅子は車体フレーム(1)が後方に傾倒した状態となっており、さらに脚受けフレーム(11)と脚受け体(18)同一平面を形成するようになり、使用者は足を伸ばした姿勢で後方に傾倒でき、臀部に集中していた体圧が背中にも分散され、使用者の苦痛を和らげることができる。すなわち、リクライニングさせたときと同様の効果が得られる。
【0010】
逆に、通常の走行状態に戻すには、前輪(23),(23)と脚受けフレーム(11)のロックを解除するだけである。
【0011】
【実施例】
以下、図面に表された本発明の実施の形態を例示しつつ、本発明をより具体的に説明する。図において、1は車椅子の車体フレームを示し、左右に離間して設けられる側部フレーム枠2を、中間部が枢着されて開閉可能に設けられるX状の交差フレーム3により前後側をそれぞれ連結し、折り畳み可能に構成されている。そして、この側部フレーム枠2,2間には撓曲自在なシートからなる背もたれ4が張設されている。前記交差フレーム3の下端部はそれぞれ側部フレーム枠2の下部に枢着され、上端部は前後方向に設けられる座席フレーム5により連結固着されている。そして、この座席フレーム5,5間には撓曲自在なシートからなる座席体6が張設されている。
【0012】
前記側部フレーム枠2は、下部側に前記交差フレーム3の枢着部となるブラケット7,7を固着した前後に向かう下部パイプ2aを備え、この下部パイプ2aに後方上部に向かうハンドルパイプ2bの基部が固着されている。このハンドルパイプ2bの上下方向の中間部には、座席支持プレート8,8を固着した座席支持パイプ2cの水平部の基部が固着され、該水平部の前端部には前方下方へ向かう傾斜部が設けられている。この傾斜部の後部には上下方向の前部パイプ2dが固着されている。そして前記ハンドルパイプ2bにはハンドル9が設けられるとともに手摺パイプ2eの基部が固着されている。さらに手摺パイプ2eの他端部は座席支持パイプ2cの水平部前方に固着されている。手摺パイプ2eの上面には手摺体10が付設されている。
【0013】
11は脚受けフレームであり、前記座席支持パイプ2cの前方に上下回動自在にピン12で枢着している。該脚受けフレーム11,11間には撓曲自在なシートからなる脚受けシート13が張設されている。さらに、該脚受けフレーム11の上昇位置と下降位置を保持する手段として、回動自在な支持プレート14と前記前部パイプ2dに固着した軸体15を配している。詳述すると、該脚受けフレーム11の後側中間部にプレート16を固着し、該プレート16に支持プレート14をピン17で枢着している。なお、前記支持プレート14には前記軸体15を挿通する通孔部14aを形成するとともに当該通孔部14aの後端部上方に前記軸体15が係脱可能な凸状の係合溝14bを一体的に形成し、略L字状の孔部となるように構成している。そして、該支持プレート14の通孔部14aに前記軸体15を挿通している。すなわち、前記脚受けフレーム11が下降位置にあるとき、前記軸体15が前記通孔部14aの前方端部に当接し、保持されている。一方、上昇したときには前記軸体15が前記係合溝14bに係合し、保持される。
【0014】
18は脚受け体であり、前記脚受けフレーム11の下端部に回動自在にピン19で枢着している。さらに、連結杆20を該脚受け体18の後端部と前記前部パイプ2dに固着された軸受体21に軸着している。すなわち、前記脚受けフレーム11を上方に回動したとき、該脚受け体18は水平状態を維持しながら上昇する。
【0015】
22は外側に手漕ぎ用のハンドリム22aを装着した後輪であり、該ハンドリム22aを回転駆動することにより車椅子を自由に走行させることができるようになっている。
【0016】
23はキャスター型の前輪であり、前輪支軸24に軸着している。該前輪23を前記側部フレーム枠2に第1リンク25,第2リンク26からなる4点リンク機構で上下に移動可能に取り付けている。詳述すると前記前部パイプ2dの後方に固着したパイプ2f中間部に第1リンク25を枢着するとともに該第1リンク25の他端部を前記前輪支軸24の上部に枢着し、前記下部パイプ2aの下面に固着した軸受体27に前記第2リンク26を枢着し、該第2リンク26の他端部を前記前輪支軸24の下部に枢着したものである。
【0017】
また、前記前輪23の上昇位置及び下降位置の保持手段として前記パイプ2fの前面には第1リンク25の下方回動を規制するストッパ体28を固着し、さらに前記前部パイプ2dの外側上部に前輪支軸24の上方移動を規制するストッパ体29を固着している。そして、前記前部パイプ2dの中間部にはプレート30を固着し、該プレート30にストッパ体31を回動自在に枢着している。該ストッパ体31には操作部となる孔31aを設けている。該ストッパ体31は通常使用時には前輪支軸24の前方側面に当接し、前輪支軸24が下方に摺動するとストッパ体31の自重により後方に回動し、前輪支軸24の上端面に当接する。すなわち、前記前輪23が上昇位置にあるとき、前記前輪支軸24上面にストッパ体29が当接する。逆に、前記前輪23が下方に移動すると前輪支軸24上面にストッパ体31が当接し、前輪支軸24の上方への移動を規制し、車体フレーム1の後方傾倒状態を保持する。
【0018】
この車椅子を使用する場合には、脚受けフレーム11を上方へ回動させる。この回動に連動して脚受け体18が脚受けフレーム11と略同一平面を形成するまでピン19を中心として回動する。そして、脚受けフレーム11の上方回動により支持プレート14の係合溝14bに軸体15が係合する。さらに上方へ持ち上げると車体フレーム1が後方に傾倒し、前輪23が車体フレーム1に対して下降する。該前輪23はストッパ体28に第1リンク25が当接するまで下降し、この位置に達するとストッパ体31が後方に回動し、前輪支軸24上面に当接することによって該前輪の上昇を規制する。この状態が図5であり、使用者の臀部に集中していた体圧が車体フレーム1の後方傾倒により背中に分散され、長時間車椅子に着座しているときの苦痛を和らげることができる。
【0019】
逆にこの状態から通常の走行状態に戻すには、ストッパ体31を前方に回動させ前輪23を上方へ摺動させる。そして、支持プレート14の係合を解くと脚受けフレーム11が下方に回動し走行状態となる。
【0020】
つぎに、図6から図9は上記と異なる実施例を示すもので、上記実施例と同じ部分には同じ記号を付して表している。前記側部フレーム枠2の前方には、上下摺動可能に取り付けた前輪23と該前輪23の上方への摺動を規制するストッパ体31を配設している。詳述すると、前記下部パイプ2aの前方部に軸受体32を前後回動可能に枢着している。該軸受体32は中空の筒体であって下端部近傍にフレームを枢着するための軸体32aを固着し、さらに該軸受体32の上方部に軸体32cを固着したものであり、該軸受体32には前輪支軸24を挿通し、該前輪支軸24下端部に前輪23を軸着している。該前輪支軸24は小径部と大径部からなる段付き支軸であって、前輪23の下方摺動時に抜け落ちないようになっている。すなわち、前記前輪23は上下に摺動可能であって、かつ前記軸体32aを支点として前後に回動可能に構成している。また、前記下部パイプ2a下面には前記軸受体32の回動を規制するストッパ体33,34が固着されている。
【0021】
そして、前記前輪23の上方摺動を規制するストッパ体31は前記前部パイプ2dの中央部にプレート30を固着し、該プレート30に前記ストッパ体31を枢着してなる。
【0022】
なお、この実施例においては、通常使用時と後方傾倒状態時で前輪23の旋回軸が異なるため後方に傾倒した際に、前輪23の旋回により車体フレームが上下に揺動してしまう。これを防止するために前輪23の旋回軸保持拘束手段を設けている。該旋回軸保持拘束手段は前後に回動自在な軸受体32と該軸受体32の回動を規制するストッパ体33,34とプレート35及び支持プレート14から構成されている。前記プレート35には軸体32cを挿通する通孔部35aを形成し、該通孔部35aに前記軸体32cを挿通し、他端部を前記脚受けフレーム11のプレート16に回動自在にピン17で枢着している。また、前記軸体15には前記支持プレート14を挿通している。すなわち、脚受けフレーム11を下降させたときは、軸受体32の半時計周りの回動がストッパ33で規制されるとともに前記プレートの通孔部35a前方端部に軸体32cが当接することにより軸受体の時計周りの回動を規制している。また、脚受けフレーム11を上げたときは、前記支持プレート35の通孔部35a後方端部に軸体32cが当接し、さらに持ち上げると軸受体32がストッパ体33に接触するまで時計周りに回動する。このとき、前輪23が下方に摺動し、ストッパ体31が自重により後方に回動することにより摺動を規制し、さらに前記プレート35の通孔部35aに軸体が当接し、半時計周りの回動を規制している。
【0023】
この車椅子を後方に傾倒し、使用者が楽な姿勢をとる際には、脚受けフレーム11を上方に回動させる。すると前記プレート14の係合溝14bに軸体15が係合し、脚受けフレーム11が上昇位置で支持される。さらに脚受けフレーム11を上方へ持ち上げると車体フレーム1が後輪22軸心を中心として後方に傾倒する。このとき、前輪23が下方に摺動するとともにストッパ体31によって上方への摺動が規制され、車体フレーム1が後方に傾倒した状態で保持される。さらに、脚受け体18が脚受けフレーム11と同一平面を形成するようになる。また、プレート35により通常走行状態時と後方傾倒状態における前輪23の旋回軸の角度が一定に保持され、後方傾倒状態時に前輪23の旋回による車体フレーム1の揺動を防止している。この状態になると、使用者の臀部に集中していた体圧が背中にも分散され、使用者の苦痛を和らげることができる。すなわち、リクライニングさせたときと同様の効果が得られる。
【0024】
逆にこの状態から通常の走行状態に戻すには、ストッパ体31を前方に回動させ前輪23を上方へ摺動させる。そして、支持プレート14の係合を解くと脚受けフレーム11が下方に回動し走行状態となる。
【0025】
【発明の効果】
以上に説明したように、本発明にかかる車椅子は、脚受けフレームの回動操作により車体フレームに対して前輪が下降し、車体フレームが後方に傾倒した状態で保持される。これによって、リクライニングと同様に臀部に集中していた体圧を背中に分散することができる効果がある。
【図面の簡単な説明】
【図1】 本発明にかかる車椅子の全体正面図
【図2】 その全体側面図
【図3】 その脚受け体の取付部を示す要部側面図
【図4】 その前輪取付部を示す要部側面図
【図5】 その傾倒状態を示す全体側面図
【図6】 上記と異なる実施例の車椅子の全体正面図
【図7】 その全体側面図
【図8】 その前輪取付部を示す要部側面図
【図9】 その傾倒状態を示す全体側面図
【符号の説明】
1 車体フレーム
4 背もたれ
6 座席
11 脚受けフレーム
22 後輪
23 前輪
24 前輪支軸
25 第1リンク
26 第2リンク
32 軸受体
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelchair suitable for use by a disabled person or an elderly person.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a wheelchair in which a backrest frame rotates backward so that a wheelchair user can stay comfortably even when riding in a wheelchair for a long time, that is, a reclining wheelchair is known.
[0003]
By the way, in the sitting posture of a wheelchair or the like, since body pressure is concentrated on the buttocks, it is difficult to keep the sitting position for a long time. Therefore, the reclining wheelchair is used, and the body pressure applied to the buttocks is distributed to the back by rotating the backrest frame backward.
[0004]
However, these reclining wheelchairs are such that the back frame is pivotally attached at its lower end to the rear end of the seat frame, and of course, the bending point of the seat frame and the back frame, When the seat frame of the wheelchair user is different from the bending point of the waist, if the back frame is tilted, the user's back will be shifted to the waist side with respect to the back frame, and conversely, the user will be raised. The back of the head shifts to the head with respect to the backrest frame. Therefore, every time the reclining was performed, it was necessary to correct the disorder of clothes and move the body to a stable posture.
[0005]
[Problems to be solved by the invention]
In view of the above problems, the present invention concentrates on the buttocks by holding the position of the front wheel when the body frame is tilted rearward without rotating the backrest frame backward relative to the seating surface. It is an object to provide a wheelchair that can disperse body pressure that has been applied to the back.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is as follows. That is, the wheelchair of the present invention includes a vehicle body frame (1) provided with a seat body (6) and a backrest (4) , and a pair of left and right rear wheels (22) disposed on both sides of the vehicle body frame (1 ). , (22) and front wheels (23), (23), and a leg support frame (11) disposed in the front part of the body frame (1) , the leg support frame (11) A holding means (A) for supporting the leg receiving frame (11) in an ascending position and a descending position is provided, and the front wheels (23) and (23) are respectively provided on the front wheel support shaft (24). , (24) and a first link (25) in which the front wheel support shafts (24), (24) are respectively pivotally attached to the front portion of the vehicle body frame (1) with one end thereof being vertically separated. By pivoting to the other end of the second link (26), the front (23), (23) is movably configured vertically with respect to the body frame (1), the front wheel (23), the Ru provided holding means for holding the raised position and the lowered position (23) (B) The holding means (A) includes a support plate (14) having a substantially L-shaped hole pivotally attached to an intermediate portion of the leg receiving frame (11) and a shaft body (15) fixed to the vehicle body frame (1). The leg receiving frame (11) is held by the engagement between the shaft body (15) and the hole, and the holding means (B) is set to the front wheel support shafts (24), (24). The stopper bodies (29), (29) fixed to the vehicle body frame (1) are in contact with the upper ends of the front wheel support shafts (24), (24), and the front wheel support shafts (24), ( 24) A stopper body rotatably attached to the vehicle body frame (1) when in the lower position. 31), (31) the front wheel shaft (24), and brought into contact (24) upper portion, wherein at each position the front wheel (23), and configured to hold (23).
[0007]
Further, a bearing body (32), (32) is pivotally attached to the front lower portion of the vehicle body frame (1) so as to be pivotable in the front-rear direction, and a front wheel support shaft that can slide up and down on the bearing body (32), (32). (24), (24) is inserted, and the front wheels (23), (23) are pivotally attached to the lower ends of the front wheel support shafts (24), (24 ) to move the front wheels (23), (23) up and down. Configured to be movable .
[0008]
[Action]
This wheelchair can be folded in the same manner as a general wheelchair, and can usually be used as a self-propelled wheelchair.
[0009]
When the user takes a comfortable posture from the normal sitting posture, the leg receiving frame (11) is rotated upward. The leg support frame (11) reaches the raised position, further leg receiving lifting frame (11) upward when the body frame (1) is a rear wheel (22), inclined to the rear about the axis (22) To do. At this time, the front wheels (23) and (23), which are attached to the body frame (1) so as to be movable up and down, move downward due to their own weight, and the position is held by the holding means (B) . In this state, the wheelchair is in a state in which the vehicle body frame (1) is tilted rearward, and the leg support frame (11) and the leg support body (18) form substantially the same plane. It can be tilted backwards with the legs extended, and the body pressure concentrated on the buttocks is distributed to the back, which can relieve the user's pain. In other words, the same effect as when reclining is obtained.
[0010]
Conversely, to return to the normal running state, it is only necessary to unlock the front wheels (23), (23) and the leg support frame (11) .
[0011]
【Example】
Hereinafter, the present invention will be described more specifically with reference to the embodiments of the present invention shown in the drawings. In the figure, reference numeral 1 denotes a body frame of a wheelchair, and a side frame frame 2 that is spaced apart from the left and right is connected to the front and rear sides by an X-shaped crossing frame 3 that is pivotally attached to an intermediate portion and can be opened and closed. And it is configured to be foldable. A backrest 4 made of a flexible seat is stretched between the side frame frames 2 and 2. The lower end portions of the intersecting frames 3 are pivotally attached to the lower portions of the side frame frames 2, and the upper end portions are connected and fixed by a seat frame 5 provided in the front-rear direction. A seat body 6 made of a flexible seat is stretched between the seat frames 5 and 5.
[0012]
The side frame 2 is provided with a lower pipe 2a that extends to the front and rear, with brackets 7 and 7 that serve as pivotal portions of the cross frame 3 fixed to the lower side, and a handle pipe 2b that extends to the upper rear side of the lower pipe 2a. The base is fixed. The base portion of the horizontal portion of the seat support pipe 2c to which the seat support plates 8 and 8 are fixed is fixed to the middle portion of the handle pipe 2b in the vertical direction, and the front end portion of the horizontal portion has an inclined portion that is directed forward and downward. Is provided. A front pipe 2d in the vertical direction is fixed to the rear portion of the inclined portion. The handle pipe 2b is provided with a handle 9, and a base portion of the handrail pipe 2e is fixed. Further, the other end of the handrail pipe 2e is fixed to the front of the horizontal portion of the seat support pipe 2c. A handrail body 10 is attached to the upper surface of the handrail pipe 2e.
[0013]
Reference numeral 11 denotes a leg receiving frame, which is pivotally attached to the front of the seat support pipe 2c by a pin 12 so as to be rotatable up and down. A leg receiving sheet 13 made of a flexible sheet is stretched between the leg receiving frames 11 and 11. Further, as a means A for holding the raised position and the lowered position of the leg receiving frame 11, a rotatable support plate 14 and a shaft body 15 fixed to the front pipe 2d are disposed. More specifically, a plate 16 is fixed to the rear intermediate portion of the leg receiving frame 11, and a support plate 14 is pivotally attached to the plate 16 with pins 17. The support plate 14 is formed with a through hole portion 14a through which the shaft body 15 is inserted, and a convex engagement groove 14b in which the shaft body 15 can be engaged and disengaged above the rear end portion of the through hole portion 14a. Are integrally formed to form a substantially L-shaped hole . The shaft body 15 is inserted through the through hole 14 a of the support plate 14. That is, when the leg receiving frame 11 is in the lowered position, the shaft body 15 is in contact with and held by the front end portion of the through hole portion 14a. On the other hand, when it rises, the shaft body 15 engages with the engagement groove 14b and is held.
[0014]
Reference numeral 18 denotes a leg receiving body, which is pivotally attached to a lower end portion of the leg receiving frame 11 by a pin 19 so as to be rotatable. Further, the connecting rod 20 is pivotally attached to a bearing body 21 fixed to the rear end portion of the leg receiving body 18 and the front pipe 2d. That is, when the leg receiving frame 11 is rotated upward, the leg receiving body 18 rises while maintaining a substantially horizontal state.
[0015]
A rear wheel 22 is provided with a hand rim 22a for rowing on the outside, and the wheel rim can be freely driven by rotationally driving the hand rim 22a.
[0016]
Reference numeral 23 denotes a caster type front wheel, which is attached to the front wheel support shaft 24. The front wheel 23 is attached to the side frame 2 so as to be vertically movable by a four-point link mechanism including a first link 25 and a second link 26. More specifically, the first link 25 is pivotally attached to an intermediate portion of the pipe 2f fixed to the rear of the front pipe 2d, and the other end of the first link 25 is pivotally attached to the upper portion of the front wheel support shaft 24. The second link 26 is pivotally attached to a bearing body 27 fixed to the lower surface of the lower pipe 2 a, and the other end of the second link 26 is pivotally attached to the lower part of the front wheel support shaft 24.
[0017]
Further, a stopper body 28 for restricting the downward rotation of the first link 25 is fixed to the front surface of the pipe 2f as a holding means B for the ascending position and the descending position of the front wheel 23 , and the outer upper part of the front pipe 2d. A stopper body 29 for restricting the upward movement of the front wheel support shaft 24 is fixed to the front wheel support shaft 24 . A plate 30 is fixed to an intermediate portion of the front pipe 2d, and a stopper body 31 is pivotally attached to the plate 30. The stopper body 31 is provided with a hole 31a serving as an operation portion. The stopper body 31 abuts against the front side surface of the front wheel support shaft 24 during normal use. When the front wheel support shaft 24 slides downward, the stopper body 31 rotates rearward due to the weight of the stopper body 31 and contacts the upper end surface of the front wheel support shaft 24. Touch. That is, when the front wheel 23 is in the raised position, the stopper body 29 contacts the upper surface of the front wheel support shaft 24. On the other hand, when the front wheel 23 moves downward, the stopper body 31 comes into contact with the upper surface of the front wheel support shaft 24, restricts the upward movement of the front wheel support shaft 24, and maintains the rearward tilted state of the body frame 1.
[0018]
When using this wheelchair, the leg support frame 11 is rotated upward. In conjunction with this rotation, the leg support 18 rotates about the pin 19 until it forms substantially the same plane as the leg support frame 11. The shaft body 15 is engaged with the engagement groove 14 b of the support plate 14 by the upward rotation of the leg receiving frame 11. When lifted further upward, the body frame 1 tilts backward, and the front wheels 23 descend with respect to the body frame 1. The front wheel 23 is lowered until the first link 25 comes into contact with the stopper body 28. When the front wheel 23 reaches this position, the stopper body 31 rotates rearward and comes into contact with the upper surface of the front wheel support shaft 24, thereby restricting the front wheel from rising. To do. This state is shown in FIG. 5, and the body pressure concentrated on the user's buttocks is distributed to the back by the rearward tilt of the vehicle body frame 1, so that the pain when sitting on the wheelchair for a long time can be eased.
[0019]
Conversely, to return from this state to the normal running state, the stopper body 31 is rotated forward and the front wheel 23 is slid upward. Then, when the engagement of the support plate 14 is released, the leg receiving frame 11 rotates downward and enters a running state.
[0020]
Next, FIGS. 6 to 9 show an embodiment different from the above, and the same parts as those in the above embodiment are denoted by the same reference numerals. In front of the side frame 2, a front wheel 23 that is slidable in the vertical direction and a stopper body 31 that restricts the upward sliding of the front wheel 23 are disposed. More specifically, a bearing body 32 is pivotally attached to the front portion of the lower pipe 2a so as to be able to rotate back and forth. The bearing body 32 is a hollow cylindrical body, in which a shaft body 32a for pivotally attaching a frame is fixed in the vicinity of the lower end portion, and a shaft body 32c is fixed to an upper portion of the bearing body 32, The front wheel support shaft 24 is inserted into the bearing body 32, and the front wheel 23 is attached to the lower end portion of the front wheel support shaft 24. The front wheel support shaft 24 is a stepped support shaft having a small diameter portion and a large diameter portion, and is prevented from falling off when the front wheel 23 slides downward. That is, the front wheel 23 is slidable up and down and is configured to be able to rotate back and forth with the shaft body 32a as a fulcrum. Further, stopper bodies 33 and 34 for restricting the rotation of the bearing body 32 are fixed to the lower surface of the lower pipe 2a.
[0021]
The stopper body 31 for restricting the upward sliding of the front wheel 23 is formed by fixing a plate 30 to a substantially central portion of the front pipe 2d and pivoting the stopper body 31 on the plate 30.
[0022]
In this embodiment, since the turning axis of the front wheel 23 is different between the normal use and the backward tilted state, the vehicle body frame 1 swings up and down due to the turning of the front wheel 23 when tilted backward. In order to prevent this, a turning shaft holding and restraining means C for the front wheel 23 is provided. The swivel shaft holding and restraining means C includes a bearing body 32 that can pivot back and forth, stopper bodies 33 and 34 that restrict the pivoting of the bearing body 32, a plate 35, and a support plate 14. The plate 35 is formed with a through-hole portion 35a through which the shaft body 32c is inserted, the shaft body 32c is inserted into the through-hole portion 35a, and the other end portion is freely rotatable on the plate 16 of the leg receiving frame 11. It is pivotally attached at pin 17. Further, the support plate 14 is inserted through the shaft body 15 . That is, when the leg receiving frame 11 is lowered, the counterclockwise rotation of the bearing body 32 is restricted by the stopper 33, and the shaft body 32c comes into contact with the front end portion of the through hole portion 35a of the plate. The rotation of the bearing body in the clockwise direction is restricted. When the leg support frame 11 is raised, the shaft body 32c comes into contact with the rear end of the through hole 35a of the support plate 35. When the shaft body 32c is further lifted, it rotates clockwise until the bearing body 32 contacts the stopper body 33. Move. At this time, the front wheel 23 slides downward, and the stopper body 31 pivots backward by its own weight, thereby restricting the sliding. Further, the shaft body comes into contact with the through hole portion 35a of the plate 35, and the counterclockwise rotation Is restricted.
[0023]
When the wheelchair is tilted rearward and the user takes a comfortable posture, the leg support frame 11 is rotated upward. Then, the shaft 15 is engaged with the engagement groove 14b of the plate 14, and the leg receiving frame 11 is supported at the raised position. When the leg support frame 11 is further lifted upward, the vehicle body frame 1 tilts rearward about the rear wheel 22 axis. At this time, the front wheel 23 slides downward and the upward sliding is restricted by the stopper body 31, and the vehicle body frame 1 is held in a state of being tilted rearward. Further, the leg receiving body 18 forms substantially the same plane as the leg receiving frame 11. Further, the angle of the turning shaft of the front wheel 23 in the normal traveling state and the rearward tilted state is kept constant by the plate 35, and the swing of the vehicle body frame 1 due to the turning of the front wheel 23 in the rearward tilted state is prevented. In this state, the body pressure concentrated on the user's buttocks is distributed to the back, and the user's pain can be eased. In other words, the same effect as when reclining is obtained.
[0024]
Conversely, to return from this state to the normal running state, the stopper body 31 is rotated forward and the front wheel 23 is slid upward. Then, when the engagement of the support plate 14 is released, the leg receiving frame 11 rotates downward and enters a running state.
[0025]
【The invention's effect】
As described above, the wheelchair according to the present invention is held in a state where the front wheel is lowered with respect to the vehicle body frame and the vehicle body frame is tilted rearward by the turning operation of the leg support frame. As a result, there is an effect that the body pressure concentrated on the buttocks can be dispersed on the back as in the case of the reclining.
[Brief description of the drawings]
1 is an overall front view of a wheelchair according to the present invention. FIG. 2 is an overall side view of the wheelchair. FIG. 3 is a side view of an essential part showing an attachment part of the leg receiving body. Side view [FIG. 5] Whole side view showing the tilted state [FIG. 6] Whole front view of the wheelchair of the embodiment different from the above [FIG. 7] Its whole side view [FIG. 8] Side view of the main part showing its front wheel mounting portion [Figure 9] Overall side view showing the tilted state [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body frame 4 Backrest 6 Seat 11 Leg receiving frame 22 Rear wheel 23 Front wheel 24 Front wheel spindle 25 First link 26 Second link 32 Bearing body

Claims (2)

座席体(6)及び背もたれ(4)を付設した車体フレーム(1)と、該車体フレーム(1)の両側部に配設された左右一対の後輪(22),(22)及び前輪(23),(23)と、前記車体フレーム(1)の前方部に配設された脚受けフレーム(11)とを備えた車椅子において、前記脚受けフレーム(11)を回動自在に支持するとともに、該脚受けフレーム(11)の上昇位置及び下降位置を保持する保持手段(A)を設け、さらに前記前輪(23),(23)それぞれ前輪支軸(24),(24)に軸着し、該前輪支軸(24),(24)をそれぞれ前記車体フレーム(1)の前部で一端部を上下に離間して枢着した第1リンク(25)と第2リンク(26)の他端部に枢着することにより、前記前輪(23),(23)が車体フレーム(1)に対し上下に移動可能に構成され、該前輪(23),(23)の上昇位置及び下降位置を保持する保持手段(B)を設けるに、前記保持手段(A)は脚受けフレーム(11)の中間部に枢着した略L字状の孔部を備えた支持プレート(14)と車体フレーム(1)に固着した軸体(15)とからなり、前記軸体(15)と前記孔部との係合によって前記脚受けフレーム(11)を保持するよう構成し、前記保持手段(B)を前輪支軸(24),(24)が上方位置にあるとき車体フレーム(1)に固着したストッパ体(29),(29)が前記前輪支軸(24),(24)上端部に接当し、前輪支軸(24),(24)が下方位置にあるとき車体フレーム(1)に回動自在に取り付けたストッパ体(31),(31)が前記前輪支軸(24),(24)上端部に接当し、それぞれの位置で前記前輪(23),(23)を保持するよう構成したことを特徴とする車椅子。A vehicle body frame (1) provided with a seat body (6) and a backrest (4) , and a pair of left and right rear wheels (22), (22) and front wheels (23 ) disposed on both sides of the vehicle body frame (1) ), (23), and a leg support frame (11) disposed in a front portion of the vehicle body frame (1) , the leg support frame (11) is rotatably supported, Holding means (A) for holding the raised position and the lowered position of the leg support frame (11) is provided, and the front wheels (23) and (23) are attached to the front wheel support shafts (24) and (24) , respectively. In addition to the first link (25) and the second link (26) , the front wheel support shafts (24) and (24) are pivotally attached to the front portion of the vehicle body frame (1) with one end portion being vertically separated. by pivotally connected to the end portion, the front wheel (23), (23) the vehicle body off Configured to be movable up and down relative to chromatography beam (1), the front wheel (23), the Ru provided holding means for holding the raised position and the lowered position (23) (B), said holding means (A) is A support plate (14) having a substantially L-shaped hole pivotally attached to an intermediate portion of the leg support frame (11) and a shaft body (15) fixed to the vehicle body frame (1). 15) is configured to hold the leg receiving frame (11) by engagement with the hole portion, and the holding means (B) is configured so that the front wheel support shafts (24), (24) are in the upper position when the vehicle body frame When the stopper bodies (29) and (29) fixed to (1) are in contact with the upper ends of the front wheel support shafts (24) and (24), and the front wheel support shafts (24) and (24) are in the lower position. Stopper bodies (31) and (31) rotatably attached to the body frame (1) are the front wheels. Roll axis (24), and brought into contact (24) upper portion, wherein at each position the front wheel (23), characterized by being configured to hold (23). 車体フレーム(1)前方下部に前後方向回動自在に軸受体(32),(32)を枢着し、該軸受体(32),(32)に上下に摺動可能な前輪支軸(24),(24)を挿通し、該前輪支軸(24),(24)の下端部に前輪(23),(23)を軸着して前記前輪(23),(23)を上下に移動可能に構成したことを特徴とする請求項1記載の車椅子。A bearing body (32), (32) is pivotally attached to the front lower part of the body frame (1) so as to be pivotable in the front-rear direction, and a front wheel support shaft (24 ) slidable up and down on the bearing bodies (32), (32). ), (24) is inserted, and the front wheels (23), (23) are attached to the lower ends of the front wheel support shafts (24), (24) to move the front wheels (23), (23) up and down. The wheelchair according to claim 1, wherein the wheelchair is configured to be possible .
JP28996198A 1998-09-04 1998-09-04 wheelchair Expired - Fee Related JP4140934B2 (en)

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JP28996198A JP4140934B2 (en) 1998-09-04 1998-09-04 wheelchair

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JP4140934B2 true JP4140934B2 (en) 2008-08-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3680160B2 (en) * 2000-09-04 2005-08-10 日進医療器株式会社 wheelchair
JP2005342373A (en) * 2004-06-07 2005-12-15 Amano:Kk Wheelchair of wheelchair bathing device
KR101447549B1 (en) 2013-06-17 2014-10-08 주식회사 이씨엠 An electric wheelchair having a function of joint movement

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