JP2013048869A

JP2013048869A - Forwardly inclining wheelchair

Info

Publication number: JP2013048869A
Application number: JP2011201118A
Authority: JP
Inventors: Susumu Nagasaku; 進永作
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-30
Filing date: 2011-08-30
Publication date: 2013-03-14
Anticipated expiration: 2031-08-30
Also published as: JP5291773B2

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair that takes a forwardly inclining condition more easily, and can accomplish a getting off operation without raising and folding a footrest when a wheelchair user gets off the wheelchair, and in which the structure is simple, and that can correspond also to the folding type.SOLUTION: When a user sitting in the wheelchair gets off, and when the user's weight is moved forward holding a lock release lever 11, an elasticity expansion and contraction member 20 expands to a stretch position in which an engaging recess portion 23 provided at the upper part of an axle 13 of a supported base frame 2 supported by the axle 13 of a rear wheel 12, and an engaging protrusion portion 24 of a body frame 1 are separated in a lock release state, and the body frame 1 is tilted to a forward incline position. The body frame 1 and the base frame 2 are connected at a front wheel support board 2c through a link member 15 and a pivot shaft 14, and turn making the pivot shaft 14 as a fulcrum when inclining, and a footrest 5 descends to the ground or the ground neighborhood site in the forward inclining position, thereby the wheelchair user can stand up by stepping on the same without raising the footrest 5, and the folding type can be corresponded by an X-shaped link mechanism 17.

Description

本発明は車椅子利用者が、特に車椅子より下乗する際、より容易に前傾姿勢をとり得るように前傾可能な車椅子に関する。 The present invention relates to a wheelchair that can be tilted forward so that a wheelchair user can take a forward leaning posture more easily, particularly when getting off the wheelchair.

車椅子利用者の体型や身体状況に応じて車椅子の着座部分を傾斜させる、いわゆるリクライニング式のものが、例えば特許文献１にみられる。この構成では、座部及び背部を一体的あるいは個別的に適宜の角度状態に傾斜させ、この傾斜動のために２つの伸縮部材が設けられ、これらの伸縮部材の個々の動作によって座部及び背部が、前輪及び後輪を一体に支持するメインフレームに対して相対的に傾斜移動可能に調整がされている。 For example, Patent Document 1 discloses a so-called reclining type in which a seating portion of a wheelchair is inclined according to the body shape and physical condition of the wheelchair user. In this configuration, the seat portion and the back portion are tilted integrally or individually at an appropriate angle state, and two elastic members are provided for the tilting movement, and the seat portion and the back portion are operated by the individual operations of these elastic members. However, it is adjusted so that it can move relative to the main frame that integrally supports the front wheels and the rear wheels.

特開２００２−１０２２９１号広報JP 2002-102291 PR

発明の解決しようとする課題Problems to be Solved by the Invention

特許文献１の構成では、車椅子利用者が着座状態において、そのリクライニング操作により最適な姿勢をとり得る点において効果があり、又、車椅子からの下乗の際に座部を前下がり状態に傾斜する事により、その下乗動作を容易にする事は認められる。しかし、リクライニング操作可能な可動フレーム部分は前輪及び後輪を一体に支持するメインフレーム上に載置されている為、該メインフレームの車椅子の前側位置にも延出している関係上、座部を前下がり状態に移動させても、フットレストが接地又は接地近傍部位まで傾斜させるには、メインフレームが邪魔になって十分になし得ない構造である。従って、車椅子利用者が下乗する場合には、座部を前下がり状態でフットレストを跳ね上げて折りたたんでからでないとスムーズな下乗動作を遂行できない問題があった。又、同文献１の構造では、メインフレーム上にリクライニング操作可能な可動フレーム部分をリンク連結する構造が複雑で、折り畳み式車椅子の設計も困難であるといった問題もあった。 The configuration of Patent Document 1 is effective in that the wheelchair user can take an optimum posture by the reclining operation in the sitting state, and the seat portion is inclined to the front-lowering state when getting off from the wheelchair. By doing this, it is allowed to make the lowering movement easier. However, since the movable frame part that can be operated for reclining is placed on the main frame that integrally supports the front wheel and the rear wheel, the seat portion is also extended because the main frame extends to the front side position of the wheelchair. Even if the footrest is moved to the front lowering state, the main frame is in the way of being obstructed so that the footrest can be grounded or tilted to the vicinity of the grounding. Therefore, when a wheelchair user gets on the board, there is a problem that a smooth boarding operation cannot be performed unless the footrest is flipped up and folded while the seat is lowered. Further, the structure of the same document 1 has a problem that the structure of linking the movable frame portion that can be reclined on the main frame is complicated, and the design of the folding wheelchair is also difficult.

課題を解決する為の手段Means to solve the problem

上記目的を達成するために、本発明においては、座部を支持する座部フレーム部と、背部を支持するとともに上方延出端に介助者用の把手を取着した背部フレーム部と、フットレスト支持フレーム部と、を含んで一体に構成した本体フレームと、前輪を支持する前輪支持ボードと前輪に比して大径の後輪の車軸に軸支されて一体に構成するとともに前記本体フレームと分離構成された基台フレームと、該本体フレームを正規位置から該フットレストが接地又は接地近傍部位にいたるまで該基台フレームと相対的に前傾した前傾位置まで傾動可能に基台フレームに枢支する枢支手段と、前記正規位置において該本体フレームを該基台フレームに担持手段と、該本体フレームと基台フレームとの間に設けられた該本体フレームを該正規位置から前傾位置へと傾動させるように縮小位置と伸長位置との間で動作可能な弾性伸縮手段と該弾性伸縮手段を、該本体フレームの正規位置及び前傾位置にそれぞれ対応して該弾性伸縮手段の動作を拘束するロック手段と、を具備してなる車椅子を提案するものである。 In order to achieve the above object, in the present invention, a seat frame portion that supports a seat portion, a back frame portion that supports a back portion and has a handle for an assistant attached to an upper extension end, and a footrest support A main body frame including a frame portion, a front wheel support board that supports the front wheels, and a single wheel frame that is pivotally supported by the axle of the rear wheel that is larger in diameter than the front wheels and separated from the main body frame. The constructed base frame and the main body frame are pivotally supported on the base frame so that the main body frame can be tilted from a normal position to a forward tilted position relative to the base frame until the footrest reaches the grounding or near grounding position. Pivoting means for supporting the main body frame on the base frame at the normal position, and the main body frame provided between the main body frame and the base frame in front of the normal position. The elastic expansion / contraction means operable between the contraction position and the expansion position so as to tilt to the position, and the elastic expansion / contraction means correspond to the normal position and the forward tilt position of the main body frame, respectively. And a lock means for restraining the wheelchair.

又、本発明においては、前記本体フレームを正規位置から該フットレストが接地近傍部位にいたるまで前記基台フレームと相対的に前傾位置まで傾動可能にするため、該本体の前部縦フレーム下端部に固着したリンク部材と、前記基台フレームの前輪支持ボードの下部部位に枢支軸を介してリンク連結し、その回動軸を支点に車椅子を前屈みの状態に傾斜させるように前記リンク部材の回動を許容してなる車椅子を提案するものである。 Further, in the present invention, the lower end of the front vertical frame of the main body is configured so that the main body frame can be tilted to a forward tilt position relative to the base frame until the footrest reaches a portion near the ground. The link member fixed to the base frame is linked to the lower part of the front wheel support board of the base frame via a pivot shaft, and the wheel member is tilted forwardly with the pivot shaft as a fulcrum. A wheelchair that allows rotation is proposed.

又、本発明においては、前記弾性伸縮手段の取着方法は前記本体下部フレームの中間部に中空の継ぎ手を設け、該弾性伸縮手段を該継ぎ手の中空部を貫通して該弾性伸縮手段の一端又は上端部を該本体フレームと、該弾性伸縮手段の他端又は下端部を基台フレームに回動可能に支持してなる前傾可能な車椅子を提供するものである。 In the present invention, the elastic expansion / contraction means may be attached by providing a hollow joint at an intermediate part of the lower frame of the main body, and passing through the elastic expansion / contraction means through the hollow portion of the joint. Alternatively, a wheelchair that can be tilted forward is provided in which the upper end portion is rotatably supported by the main body frame and the other end or lower end portion of the elastic expansion / contraction means is supported by the base frame.

発明の効果Effect of the invention

上記構成の通り、本発明に係る前傾可能な車椅子において座部及び背部フレーム部と、フットレスト支持フレーム部とを含んで一体に構成した本体フレームとし、これと分離構成した基台フレームは前輪支持部と大径の後輪の車軸を軸支して一体構成すると共に、前記本体の前部縦フレームの下端部に固着したリンク部材と前記基台フレームの前輪の近接部位とで両フレームを相互に枢支軸にてリンク連結する構成としたので、基台フレームが車椅子の前側部分に延出する構造物がなくなり、本体フレームを前傾させる際にフットレストを接地又は接地近傍部位まで容易に本体フレームを傾動させることが可能となた。そのため車椅子利用者の下乗の際に正規位置にある本体フレームをロック手段によるロックを解除して後、利用者が前方に体重を移動すると、弾性伸縮手段による伸長位置までの動作により本体は前傾状態に傾動し、座部及び背部が一体に前方に移動すると共にフットレストが接地状態まで下降するので、このフットレストを跳ね上げて折りたたむことなく、これを踏んだ状態で利用者が車椅子より立ち上がることが可能となり、下乗動作が一層容易となるものである。又正規位置においては該本体フレームが担持手段を介して、基台フレームに担持されて安定状態を保持しえる。又、搭乗する際はロック解除してから前傾している座部に利用者が座るとその体重が弾性伸縮手段の付勢に抗して縮小位置まで移動するので着座時のショックを和らげ、正規位置及び前傾位置ではロック手段により本体フレームの位置を規制するので傾動操作の安定性も確保されるものであり、更に折り畳み式車椅子の設計にも対応しえる。構造が簡単な為、既存の車椅子をも容易に改造が出来る前傾可能な車椅子を提供しえる。 As described above, in the forward tiltable wheelchair according to the present invention, the main body frame including the seat portion and the back frame portion and the footrest support frame portion is configured integrally, and the base frame separated from this is supported by the front wheel. The frame and the large-diameter rear wheel axle are pivotally supported, and the two frames are mutually connected by a link member fixed to the lower end portion of the front vertical frame of the main body and the adjacent portion of the front frame of the base frame. Since the base frame does not have a structure that extends to the front part of the wheelchair, the footrest can be easily grounded to the grounding or near grounding part when the main body frame is tilted forward. The frame can be tilted. Therefore, when the user moves his / her body weight after unlocking the main body frame in the normal position when the wheelchair user is getting on, the main body is moved forward by the movement to the extended position by the elastic expansion / contraction means. The seat and back move together and the footrest moves down to the grounded state. This makes it possible to perform the lowering operation more easily. In the normal position, the main body frame can be supported on the base frame via the supporting means and can maintain a stable state. Also, when boarding, when the user sits on the seat tilted forward after unlocking, the weight moves to the contracted position against the bias of the elastic expansion and contraction means, so the shock at the time of sitting is eased, In the normal position and the forward tilt position, the position of the main body frame is regulated by the lock means, so that the stability of the tilting operation is ensured, and the design of the folding wheelchair can be supported. Since the structure is simple, it is possible to provide a forward tiltable wheelchair that can be easily modified even with an existing wheelchair.

本発明の車椅子において、係合凹部と、これに対応する形状の係合凸部のいずれか一方を基台フレームに形成した第１の係合部とし、他方を本体フレームに形成した第２の係合として担持手段を構成したので、正規位置において該係合凹部に係合凸部が係合する事により横ずれすることなく安定状態に維持でき、しかも該第１の係合部を後輪の車軸の垂直上方において、その近傍に位置ずけたので、これに第２の係合部との係合によって係る上方からの荷重は後輪の車軸にたいして垂直下方に作用する。従って該荷重が車軸で受け止められる為、位置の安定に一層の効果を発揮する。 In the wheelchair of the present invention, either one of the engagement concave portion and the engagement convex portion having a shape corresponding to the engagement concave portion is used as a first engagement portion formed on the base frame, and the other is formed on the main body frame. Since the carrying means is configured as the engagement, it can be maintained in a stable state without being laterally displaced by engaging the engaging convex portion with the engaging concave portion at the normal position, and the first engaging portion is secured to the rear wheel. Since it is located in the vicinity of the upper part of the axle vertically, the load from above due to the engagement with the second engaging portion acts on the axle of the rear wheel vertically downward. Accordingly, since the load is received by the axle, the effect of stabilizing the position is further exhibited.

弾性伸縮手段は、相互入れ子式に組み合わされた外筒と内筒の内部に配置したコイルばねの伸縮動作によって外筒を内筒と相互的に伸長させ本体フレームの前傾動作を遂行する為の機能と着座の際のショックを緩和させる機能を十分に果し得るものである。 The elastic expansion / contraction means is used to perform the forward tilting operation of the main body frame by extending the outer cylinder mutually with the inner cylinder by the expansion / contraction operation of the outer cylinder combined with each other and the coil spring disposed inside the inner cylinder. The function and the function to alleviate the shock at the time of sitting can be sufficiently achieved.

ロック手段において手動操作にもとずいて進退自在なロックピンを外筒に設け、これと係合する第１及び第２の係合孔を内筒に設けるとともに、ロックピンと選択的に係合させることにより、弾性伸縮手段の縮小位置と伸長位置の切り替え、ならびにこれら各位置におけるロック動作を容易に成し得るものであり、このロックピンの手動操作は車椅子利用者ならびに介助者の操作部位において遠隔操作で容易に成し得るものである。The lock means is provided in the outer cylinder with a lock pin that can be moved forward and backward based on manual operation, and first and second engagement holes that engage with the lock pin are provided in the inner cylinder and selectively engaged with the lock pin. Therefore, switching between the contraction position and the extension position of the elastic expansion / contraction means and the locking operation at each position can be easily performed. Manual operation of the lock pin is performed remotely at the operation site of the wheelchair user and the assistant. It can be easily achieved by operation.

本発明に係る前傾可能な車椅子の実施形態を示すもので正規位置にある状態の車椅子の概略側面図。The schematic side view of the wheelchair in the state which shows the embodiment of the wheelchair which can lean forward according to the present invention, and is in a regular position. 図１に示す車椅子の前傾位置に傾動させた状態で示す概略側面ず。The schematic side surface shown in the state tilted to the forward tilt position of the wheelchair shown in FIG. 図１に示す車椅子の背面側の状態を示す概略図。Schematic which shows the state of the back side of the wheelchair shown in FIG. 本発明に係る車椅子の構成中の中空継ぎ手の要部拡大説明図Explanatory drawing of the essential part of the hollow joint in the configuration of the wheelchair according to the present invention 本発明に係る車椅子の構成中の担持手段の要部拡大説明図。The principal part expansion explanatory drawing of the support means in the structure of the wheelchair which concerns on this invention. 本発明に係る前傾可能な車椅子に用いられる弾性伸縮手段としての伸縮部材の概要を示し、（ａ）は縮小位置、（ｂ）は伸長位置にある状態の概略断面図であるBRIEF DESCRIPTION OF THE DRAWINGS The outline of the expansion-contraction member as an elastic expansion-contraction means used for the wheelchair which can be tilted forward according to this invention is shown, (a) is a schematic sectional drawing of the state which exists in a contracted position, (b) is an expansion | extension position.

以下に図面を参照して本発明に係る前傾可能な車椅子の実施形態を説明する。図１は本発明に係る前傾可能な車椅子の実施形態を側面より見た概略図であり、１は本体フレーム、２は基台フレームで相互に分離して構成されている。本体フレーム１は座部３及び背部４をそれぞれ支持する座部フレーム部１ａ及び背部フレーム部１ｂと、下端においてフットレスト５を開閉自在に支持するフットレスト支持フレーム部１ｃとを含んで一体構成されている。該背部フレーム部１ｂはその上方延出端に介助者用の把手７及び弾性伸縮手段をワイヤー８を介して操作する操作レバー９が取着されている。また、該本体フレーム１に一体構成された車椅子利用者（図示せず）の肘掛用のフレーム１ｅの前側には同じく弾性伸縮手段をワイヤー１０を介して車椅子利用者が操作する操作レバー１１が取着されている。 Hereinafter, an embodiment of a wheelchair capable of tilting forward according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of an embodiment of a wheelchair that can be tilted forward according to the present invention as seen from the side, wherein 1 is a main body frame and 2 is a base frame that are separated from each other. The main body frame 1 is integrally configured to include a seat frame portion 1a and a back frame portion 1b that support the seat portion 3 and the back portion 4, respectively, and a footrest support frame portion 1c that supports the footrest 5 at the lower end so as to be opened and closed. . The back frame portion 1b is attached at its upper extension end with a handle 7 for an assistant and an operation lever 9 for operating an elastic expansion / contraction means via a wire 8. In addition, on the front side of the armrest frame 1e of a wheelchair user (not shown) integrally formed with the main body frame 1, an operating lever 11 for operating the wheelchair user via the wire 10 is also attached. It is worn.

基台フレーム２は基台横フレーム２ｂの前方延出部に前輪６を支持する前輪支持フレーム２ｃを設け、前輪に比して大径の後輪１２の車軸１３が基台縦フレーム２ａの上部で回動自在に軸支され、その下端部を基台横フレーム２ｂに固着して一体構成され、本体前部縦フレーム１ｇの下端部に固着したリンク部材１５と、前輪支持フレーム２ｃと枢支軸１４を介して連結し、本体フレーム１は基台フレーム２に対して枢支軸１４を中心として図２に示すごとく全体に前方向に傾斜した前傾位置に傾動可能になっている。この傾動範囲は、図１に示すごとく本体フレーム１が車椅子利用者を着座させる正規位置と、図２に示すごとくフットレスト５が接地又は接地近傍に至るまで前傾した前傾位置との間で規制される。又、この枢支軸１４の装着位置は本体フレーム１すなわち、座部フレーム１ａの傾斜角度と、フットレスト５の接地面での平行度を決める重要な役目をもっている。図１、図２に示すごとく枢支軸１４の装着位置を前輪支持ボードの下部に設ける事により、座部フレーム１ａの傾斜角度は利用者が立ち上がりやすい略２０°にする事が可能で、又フットレスト５も接地面と略平行にできる。しかし例えば、枢支軸１４の装着位置がティルトタイプのように座部フレーム１ａ上にあると、座部フレーム１ａの傾斜は急角度になり、それに連係して、フットレスト５は接地面に対して急角度に接地するので正常の動作が困難になる、その為フットレストを平行に保持する為にはリンク機構の手段があるが、これは結果的に生産コストを上げることになる。 The base frame 2 is provided with a front wheel support frame 2c for supporting the front wheel 6 at a front extension portion of the base horizontal frame 2b, and the axle 13 of the rear wheel 12 having a larger diameter than the front wheel is located above the base vertical frame 2a. The link member 15 which is pivotally supported by the shaft, is fixed to the lower end portion of the main body front vertical frame 1g, and is integrally formed by fixing the lower end portion to the base horizontal frame 2b, and the front wheel support frame 2c and the pivot support. Connected via a shaft 14, the main body frame 1 can be tilted with respect to the base frame 2 about a pivot shaft 14 to a forward inclined position inclined in the forward direction as shown in FIG. 2. This tilting range is regulated between a normal position where the main body frame 1 seats the wheelchair user as shown in FIG. 1 and a forward tilt position where the footrest 5 is tilted forward until it reaches the ground or near the ground as shown in FIG. Is done. The mounting position of the pivot shaft 14 has an important role in determining the inclination angle of the main body frame 1, that is, the seat frame 1 a and the parallelism on the ground contact surface of the footrest 5. As shown in FIG. 1 and FIG. 2, the mounting position of the pivot shaft 14 is provided at the lower part of the front wheel support board, so that the inclination angle of the seat frame 1a can be set to about 20 ° where the user can easily stand up. The footrest 5 can also be substantially parallel to the ground plane. However, for example, if the mounting position of the pivot shaft 14 is on the seat frame 1a as in the tilt type, the inclination of the seat frame 1a becomes a steep angle, and the footrest 5 is connected to the grounding surface in association with it. Since the grounding at a steep angle makes normal operation difficult, there is a link mechanism means for holding the footrest in parallel, which results in an increase in production cost.

図３に示すごとく前後の折畳み用Ｘ字形リンク装置の各々Ｘ字形リンク１７は、下端部が本体下部フレーム１ｆより延出して取着されたブラケット３５を介して回動自在に取着（図示せず）さるか、副フレーム３６に回動自在に取着される。また前後のＸ字形リンク１７の上端部は座部３の側面バー３７にリンク連結され、当該車椅子を折り畳み可能に構成している。 As shown in FIG. 3, each of the X-shaped links 17 of the front and rear folding X-shaped link devices is rotatably attached via a bracket 35 having a lower end extending from the main body lower frame 1f and attached (not shown). Rather, it is pivotally attached to the sub-frame 36. Further, the upper end portions of the front and rear X-shaped links 17 are linked to the side bar 37 of the seat portion 3 so that the wheelchair can be folded.

１９は中空の継ぎ手で、図２及び図４に示すように本体下部フレーム１ｆの中間部に配備され、弾性伸縮部材２０は該継ぎ手１９の中空部を貫通する事によって、その一端を基台横フレーム２ｂに回動軸２１を介して回動自在に取着されるとともに、他端が本体座部フレーム１ｆに回動軸２２を介して回動自在に取着されるため、取着手段が容易なうえに弾性伸縮部材２０が伸長した位置、つまり、車椅子本体１が前傾した状態において、弾性伸縮部材２０はその上端と下端と，更に中空の継ぎ手１９を貫通して摺動している弾性伸縮部材のシリンダー２６の３点支持となり車椅子本体１の横ぶれを一層制御し前傾位置を安定した状態で保持出来る。 2 and 4, a hollow joint 19 is provided in the middle part of the lower frame 1f of the main body, and the elastic elastic member 20 penetrates the hollow part of the joint 19 so that one end thereof can be The frame 2b is pivotally attached via the pivot shaft 21 and the other end is pivotally attached to the main body seat frame 1f via the pivot shaft 22. In addition to being easy, the elastic elastic member 20 slides through the upper and lower ends and the hollow joint 19 in a position where the elastic elastic member 20 is extended, that is, in a state where the wheelchair body 1 is tilted forward. It becomes a three-point support of the cylinder 26 of the elastic expansion and contraction member, and the lateral movement of the wheelchair body 1 can be further controlled to keep the forward tilt position in a stable state.

図５は担持手段を示す。基台フレーム２側に形成した係合凹部２３と本体フレーム１側に形成した係合凸部２４とより、正規位置において本体フレーム１を基台フレーム２に担持させる担持手段が構成されている。そして、係合凹部２３を後輪１２の車軸１３の垂直上方において、その近傍に位置付けたので、これに本体フレーム１側の係合凸部２４との係合によってかかる上方からの荷重は後輪の車軸１３に対して垂直下方に作用するので、該荷重が車軸１３で受け止められる。従って、本体フレーム１から基台フレーム２に対して偏った力が作用せず、本体フレーム１を正規位置に安定した状態で保持できる。 FIG. 5 shows the carrying means. The engagement concave portion 23 formed on the base frame 2 side and the engagement convex portion 24 formed on the main body frame 1 side constitute a supporting means for supporting the main body frame 1 on the base frame 2 at the normal position. Since the engagement recess 23 is positioned in the vicinity of the rear wheel 12 in the vertical upper direction of the axle 13, the load from above applied by the engagement with the engagement protrusion 24 on the main body frame 1 is applied to the rear wheel 12. Therefore, the load is received by the axle 13. Accordingly, a biased force from the main body frame 1 to the base frame 2 does not act, and the main body frame 1 can be held in a stable state at a normal position.

図６は前記弾性伸縮部材２０とその内部構造を示すもので、相互に入れ子式に組み合わされた外筒２６と内筒２７に配置したコイルばね３２の伸縮動作によって外筒２６を内筒２７と相互的に伸長させ本体フレームの前傾動作を遂行するための機能と着座の際のショックを緩和させる機能を十分に果しえるものである。また内部に配置したコイルばねに代えて内部にガスシリンダー（図示せず）を配備する事も可能である。 FIG. 6 shows the elastic expansion / contraction member 20 and its internal structure. The outer cylinder 26 is connected to the inner cylinder 27 by the expansion / contraction operation of the coil spring 32 disposed in the outer cylinder 26 and the inner cylinder 27 combined in a nested manner. It can sufficiently fulfill the function of extending the two mutually and performing the forward tilting action of the main body frame and the function of reducing the shock at the time of sitting. It is also possible to provide a gas cylinder (not shown) inside instead of the coil spring arranged inside.

図６（ａ）は、弾性伸縮部材２０が縮小位置にある状態を、又、図６（ｂ）は伸長位置にある状態を示す。外筒２６に設けたロック機構１８のロックピン３１が内筒２７の長手方向に離間して形成した第１及び第２の係合孔２７ａ，２７ｂにより、縮小位置において第１係合孔２７ａに、伸長位置においては、第２係合孔２７ｂに係合して選択的に拘束するロック手段を構成する。この縮小位置及び伸長位置に対応して本体フレーム１が正規位置及び前傾位置へ移動する。 6A shows a state in which the elastic elastic member 20 is in the contracted position, and FIG. 6B shows a state in which it is in the extended position. The lock pin 31 of the lock mechanism 18 provided in the outer cylinder 26 is formed in the first engagement hole 27a in the contracted position by first and second engagement holes 27a and 27b formed to be separated from each other in the longitudinal direction of the inner cylinder 27. In the extended position, the lock means is configured to engage and selectively restrain the second engagement hole 27b. The main body frame 1 moves to the normal position and the forward tilt position corresponding to the reduced position and the extended position.

ロック機構１８はそれぞれ連結されたケーブル１０を図１に示すごとく介助者の操作レバー９及び車椅子利用者の操作レバー１１に共通接続させているので、いずれでも操作されるとロックピン３１が係合している係合孔ようり引き出されてロック解除状態になる。 The lock mechanism 18 is connected to the operation lever 9 of the assistant and the operation lever 11 of the wheelchair user as shown in FIG. 1 so that the lock pin 31 engages when operated in either case. The engaged hole is pulled out to be unlocked.

以上、本発明の前傾可能な車椅子の実施形態を説明したが、本発明は、これに限定されものではなく、種々の変形構成をも含みえるものである。 As mentioned above, although embodiment of the wheelchair which can tilt forward of this invention was described, this invention is not limited to this, A various deformation | transformation structure can also be included.

１本体フレーム
１ａ本体座部フレーム
１ｆ本体下部フレーム
２基台フレーム
２ａ基台縦フレーム
２ｂ基台横フレーム
１３車軸
１４枢支軸
１５リンク部材
１９中空継ぎ手
２０弾性伸縮部材DESCRIPTION OF SYMBOLS 1 Main body frame 1a Main body seat frame 1f Main body lower frame 2 Base frame 2a Base vertical frame 2b Base horizontal frame 13 Axle 14 Pivot shaft 15 Link member 19 Hollow joint 20 Elastic elastic member

Claims

座部を支持する座部フレーム部と、背部を支持するとともに上方延出端に介助用の把手を取着した背部フレーム部と、フットレストを下端において支持するフットレスト支持フレーム部と、を含んで一体に構成した本体フレームと、前輪を支持する前輪支持ボードと前輪に比して大径の後輪の車軸に軸支されて一体に構成するとともに前記本体フレームと分離構成された基台フレームと、該本体フレームを正規位置から該フットレストが接地又は接地近傍部位にいたるまで該基台フレームと相対的に前傾した前傾位置まで前傾可能に基台フレームに枢支する枢支手段と、前記正規位置において該本体フレームを該基台フレームに担持させる担持手段と、該本体フレームと基台フレームの間に設けられた該本体フレームを該正規位置から前傾位置へと傾動させるように縮小位置と伸長位置との間で動作可能な弾性伸縮手段と該弾性伸縮手段を、該本体フレームの正規位置及び前傾位置にそれぞれ対応して該弾性伸縮手段の動作を拘束するロック手段と、を具備してなる前傾可能な車椅子。 It includes a seat frame part that supports the seat part, a back frame part that supports the back part and has an assist handle attached to the upper extension end, and a footrest support frame part that supports the footrest at the lower end. A main body frame, a front wheel support board that supports the front wheels, and a base frame that is pivotally supported by the axle of the rear wheel having a larger diameter than the front wheels and is configured integrally with the main body frame; Pivot means for pivotally supporting the main body frame to a base frame so that the main body frame can be tilted forward to a forward tilt position relatively tilted forward with respect to the base frame until the footrest is brought into contact with or near the ground. A supporting means for supporting the main body frame on the base frame at a normal position, and the main body frame provided between the main body frame and the base frame is tilted forward from the normal position. The elastic expansion / contraction means operable between the contraction position and the expansion position so as to be tilted to the right and the elastic expansion / contraction means are operated in accordance with the normal position and the forward tilt position of the main body frame, respectively. A forward-tilting wheelchair comprising a locking means for restraining.

前記枢支手段は前記本体前部縦フレーム１ｇの下端部に固着したリンク部材１５と、前記基台フレームの前輪支持ボード２ｃの下部部位に枢支軸１４を介してリンク連結し、その回動軸１４を支点に車椅子を前屈みの状態に傾斜させるように該リンク部材の回動を許容してなる請求項１に記載の前傾可能な車椅子。 The pivot means is linked to a link member 15 fixed to the lower end portion of the main body front vertical frame 1g and a lower part of the front wheel support board 2c of the base frame via a pivot shaft 14, and its pivot The wheelchair capable of tilting forward according to claim 1, wherein the link member is allowed to rotate so that the wheelchair is tilted forwardly with the shaft as a fulcrum.

前記本体下部フレーム１ｆの中間部に中空の継ぎ手１９を設け、前記弾性伸縮手段２０を該中空の継ぎ手１９を貫通して該弾性伸縮手段の一端または上端部を該本体フレーム１ａに他端または下端部を基台フレーム２ａに回動自在に支持してなる請求項１に記載の前傾可能な車椅子。 A hollow joint 19 is provided at an intermediate portion of the main body lower frame 1f, and the elastic expansion / contraction means 20 passes through the hollow joint 19, and one end or upper end of the elastic expansion / contraction means is connected to the main body frame 1a at the other end or lower end. The wheelchair that can be tilted forward according to claim 1, wherein the portion is rotatably supported by the base frame 2 a.