JP3215289U

JP3215289U - Wheelchair mobility aid

Info

Publication number: JP3215289U
Application number: JP2017005859U
Authority: JP
Inventors: ▲邦▼夫川西
Original assignee: ▲邦▼夫川西
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2018-03-08
Anticipated expiration: 2027-12-27

Abstract

【課題】１人の介助者が車椅子を階段の下階から上階に容易に移動できるとともに、車椅子の転倒を低減できる車椅子移動補助装置を提供する。【解決手段】車椅子移動補助装置１は、軸部２と、１対の第１腕部３ａから１対の第４腕部３ｄまでを有する１対の屈曲部３と、１対の第１ヒンジ部４と、操作部６と、を備え、介助者３０が車椅子１０の手押しハンドル１３を手３１で把持した状態で操作部６を足３２で踏み込み操作したとき、操作部６及び１対の屈曲部３が回動し、１対の第１角部３ｅが階段２０の下段側踏面２１に接触して支点となり、車椅子１０が上方かつ後方に持ち上げられ、操作部６が階段２０の上段側踏面２２に接触したとき、車椅子１０が上方かつ後方に移動することによって、１対の第１ヒンジ部４が内側に折れ曲がり、車椅子１０が停止して安定状態となる。【選択図】図４Provided is a wheelchair movement assisting device that enables one assistant to easily move a wheelchair from the lower floor to the upper floor of the stairs and to reduce the wheelchair toppling. A wheelchair movement assisting apparatus includes a shaft portion, a pair of bent portions having a pair of first arm portions to a pair of fourth arm portions, and a pair of first hinges. When the operator 30 steps on the operation unit 6 with the foot 32 while holding the handwheel 13 of the wheelchair 10 with the hand 31, the operation unit 6 and a pair of bends are provided. The part 3 rotates, and the pair of first corners 3e comes into contact with the lower tread surface 21 of the stairs 20 to become a fulcrum, the wheelchair 10 is lifted upward and rearward, and the operation unit 6 is the upper tread of the stairs 20 When the wheelchair 10 is moved upward and rearward when the wheelchair 10 is contacted, the pair of first hinge portions 4 are bent inward, and the wheelchair 10 is stopped and becomes stable. [Selection] Figure 4

Description

本考案は、車椅子の移動を補助する車椅子移動補助装置に関する。 The present invention relates to a wheelchair movement assist device for assisting movement of a wheelchair.

従来、車椅子に要介護者、身体障害者、傷病者等の使用者が着座した状態で、車椅子を階段の下階から上階に移動させる際、階段に沿って設置された階段昇降装置を使用するものが知られている（例えば、特許文献１参照）。この種の階段昇降装置は、主に、駅や公共施設等の階段に設置されているものであって、例えば、階段に沿って設置されるガイドレールと、ガイドレールに係合して昇降する支持体と、支持体を電動駆動する駆動装置と、支持体に結合され車椅子を搭載して昇降する昇降体と、を備えるものである。 Conventionally, when a wheelchair is moved from the lower floor to the upper floor of a wheelchair with a care recipient, a disabled person, a disabled person, etc. seated on the wheelchair, a stair lift device installed along the stairs is used. Is known (see, for example, Patent Document 1). This type of stair lifting device is mainly installed on a staircase such as a station or a public facility. For example, a guide rail installed along a staircase and a guide rail that engages with the guide rail and moves up and down. A support body, a drive device that electrically drives the support body, and a lifting body that is coupled to the support body and that moves up and down by mounting a wheelchair are provided.

特開昭５８−６３６７６号公報JP 58-63676 A

しかしながら、上記のような階段昇降装置は、低層住宅、中層住宅等の階段に設置されていないことから、車椅子に使用者が着座した状態で、車椅子を階段の下階から上階に移動させるにあたって、複数人（２〜５人）の介助者が車椅子の手押しハンドル及びフレーム（レッグパイプ、アームパイプ等）を手で持ち上げ移動させる必要があった。 However, since the stair lifting device as described above is not installed on the staircase of a low-rise housing, a middle-rise housing, etc., when moving the wheelchair from the lower floor to the upper floor with the user seated on the wheelchair, It was necessary for a plurality of (2 to 5) assistants to manually lift and move the wheelchair handle and frame (leg pipe, arm pipe, etc.).

一方、１人の介助者が車椅子を階段の下階から上階に移動させる場合には、例えば、車椅子を後ろ向きとし、車椅子の手押しハンドルを手で持ち上げて移動させることとなる。すなわち、車椅子のフレームを手で持ち上げて移動させることができないことから、車椅子の手押しハンドルを持つ介助者の手に、車椅子及び車椅子に着座した使用者の全重量が掛かることとなり、もって、車椅子を階段の下階から上階に移動させることが非常に困難であるという問題があった。そしてさらには、介助者がバランスを崩し、車椅子が大きく揺動することによって、車椅子が転倒する事態となるといった問題もあった。 On the other hand, when one assistant moves the wheelchair from the lower floor to the upper floor of the stairs, for example, the wheelchair is turned backward and the handwheel handle of the wheelchair is lifted and moved by hand. In other words, since the wheelchair frame cannot be lifted and moved by hand, the full weight of the wheelchair and the user seated in the wheelchair is applied to the helper's hand holding the wheelchair push handle. There was a problem that it was very difficult to move from the lower floor of the stairs to the upper floor. Furthermore, there is a problem that the wheelchair falls because the assistant loses balance and the wheelchair swings greatly.

そこで、本考案は、上述の事情に鑑みて、１人の介助者が車椅子を階段の下階から上階に容易に移動させることができるとともに、車椅子の転倒を低減させることができる車椅子移動補助装置を提供することを目的としている。 Therefore, in view of the above circumstances, the present invention is a wheelchair movement assist that allows one assistant to easily move the wheelchair from the lower floor to the upper floor of the stairs and to reduce the wheelchair toppling. The object is to provide a device.

上記本考案の目的は、以下の手段によって達成される。なお、括弧内は、後述する実施形態の参照符号を付したものであるが、本考案はこれに限定されるものではない。 The object of the present invention is achieved by the following means. In addition, although the code | symbol in a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

請求項１の考案に係る車椅子移動補助装置（１）は、
車椅子（１０）の下部フレーム（１対のベースパイプ１１ｂ）に取り付けられる軸部（２）と、
一端部が前記軸部（２）に対し相対的に回転可能に連結される１対の第１腕部（３ａ）と、一端部が前記１対の第１腕部（３ａ）の他端部の内側に屈曲して接続される１対の第２腕部（３ｂ）と、一端部が前記１対の第２腕部（３ｂ）の他端部の内側に屈曲して接続される１対の第３腕部（３ｃ）と、一端部が前記１対の第３腕部（３ｃ）の他端部の外側に屈曲して接続され、他端部が前記車椅子（１０）の後部フレーム（バックパイプ１１ａ）の後方に設けられる１対の第４腕部（３ｄ）と、を有する側面視柄杓形状の１対の屈曲部（３）と、
前記１対の第１腕部（３ａ）の中間部に設けられ、内側に折れ曲がり可能かつ外側に折れ曲がり不能となる１対の第１ヒンジ部（４）と、
前記１対の第４腕部（３ｄ）の他端部を連結するように、前記１対の第４腕部（３ｄ）の他端部の側方に屈曲して接続され、介助者（３０）が足（３２）で踏み込み操作することによって、前記後部フレーム（バックパイプ１１ａ）の後方から階段（２０）の上段側踏面（２２）に向けて回動可能な操作部（６）と、を備え、
前記１対の第１腕部（３ａ）の他端部と前記１対の第２腕部（３ｂ）の一端部との間には、前記介助者（３０）が前記車椅子（１０）の手押しハンドル（１３）を手で把持した状態で前記操作部（６）を足で踏み込み操作した際、前記操作部（６）及び前記１対の屈曲部（３）が回動し、前記階段（２０）の下段側踏面（２１）に接触した際の支点となる第１角部（３ｅ）が設けられ、
前記１対の第１ヒンジ部（４）は、前記操作部（６）が前記階段（２０）の上段側踏面（２２）に接触した際、前記車椅子（１０）が上方かつ後方に移動することによって、内側所定位置まで折れ曲がると共に、前記１対の第１腕部（３ａ）の一端部の外側への回転を規制し、
前記階段（２０）の上段側踏面（２２）に接触した前記操作部（６）は、前記介助者（３０）が該操作部（６）を足で踏み込み操作した状態で、前記手押しハンドル（１３）を手で上方かつ後方に引き上げ操作すると、前記車椅子（１０）の駆動輪（１２）が前記階段（２０）の上段側踏面（２２）に乗り上げて移動する際の支点となることを特徴としている。 The wheelchair movement assist device (1) according to the device of claim 1 is:
A shaft (2) attached to a lower frame (a pair of base pipes 11b) of the wheelchair (10);
A pair of first arm portions (3a) whose one end portions are rotatably connected to the shaft portion (2), and one end portion is the other end portion of the pair of first arm portions (3a). A pair of second arms (3b) that are bent and connected to the inside of the pair, and a pair of one ends bent and connected to the inside of the other end of the pair of second arms (3b) Of the pair of third arms (3c) is bent and connected to the outside of the other end of the pair of third arms (3c), and the other end is the rear frame of the wheelchair (10) ( A pair of fourth arm portions (3d) provided on the rear side of the back pipe 11a),
A pair of first hinge portions (4) provided at an intermediate portion of the pair of first arm portions (3a), which can be bent inward and cannot be bent outward;
The other end of the pair of fourth arms (3d) is bent and connected to the side of the other end of the pair of fourth arms (3d), and the assistant (30 ) Is depressed with the foot (32), and the operation part (6) which is rotatable from the rear of the rear frame (back pipe 11a) toward the upper step surface (22) of the stairs (20), Prepared,
Between the other end of the pair of first arms (3a) and one end of the pair of second arms (3b), the assistant (30) pushes the wheelchair (10). When the operation part (6) is stepped on with a foot while the handle (13) is held by hand, the operation part (6) and the pair of bent parts (3) are rotated, and the stairs (20 ) Is provided with a first corner (3e) serving as a fulcrum when contacting the lower tread (21),
The pair of first hinge portions (4) is configured such that the wheelchair (10) moves upward and rearward when the operation portion (6) contacts the upper step surface (22) of the stairs (20). By bending to a predetermined position on the inside, and restricting the rotation to the outside of one end of the pair of first arms (3a),
The operation portion (6) that has come into contact with the upper tread surface (22) of the stairs (20) is in a state where the assistant (30) depresses the operation portion (6) with his / her foot and operates the hand handle (13). ) Is lifted upward and rearward by hand, and the driving wheel (12) of the wheelchair (10) serves as a fulcrum when moving on the upper step surface (22) of the stairs (20). Yes.

請求項２の考案に係る車椅子移動補助装置（１）は、上記請求項１に記載の車椅子移動補助装置（１）において、
前記１対の第２腕部（３ｂ）の中間部に設けられ、内側に折れ曲がり可能かつ外側に折れ曲がり不能となる１対の第２ヒンジ部（５）をさらに備え、
前記１対の第２ヒンジ部（５）は、前記１対の第１ヒンジ部（４）が内側所定位置まで折れ曲がっている際、前記車椅子（１０）を上方かつ後方に移動させると、内側所定位置まで折れ曲がってなることを特徴としている。 The wheelchair movement assisting device (1) according to the invention of claim 2 is the wheelchair movement assisting device (1) according to claim 1,
A pair of second hinge portions (5) provided at an intermediate portion of the pair of second arm portions (3b), which can be bent inward and cannot be bent outward;
When the pair of first hinge portions (5) is bent to a predetermined position on the inner side, the pair of second hinge portions (5) is fixed to the inner side when the wheelchair (10) is moved upward and rearward. It is characterized by bending to a position.

請求項３の考案に係る車椅子移動補助装置（１）は、上記請求項１又は２に記載の車椅子移動補助装置（１）において、一端部が前記１対の第３腕部（３ｃ）又は前記１対の第４腕部（３ｄ）に連結され、他端部が前記後部フレーム（バックパイプ１１ａ）に連結され、前記操作部（６）を前記後部フレーム（バックパイプ１１ａ）に向けて付勢する付勢手段（コイルばね７）をさらに備えてなることを特徴としている。 The wheelchair movement assisting device (1) according to the invention of claim 3 is the wheelchair movement assisting device (1) according to claim 1 or 2, wherein one end portion is the pair of third arm portions (3c) or the Connected to the pair of fourth arms (3d), the other end is connected to the rear frame (back pipe 11a), and the operating portion (6) is biased toward the rear frame (back pipe 11a). The urging means (coil spring 7) is further provided.

次に、本考案の効果について、図面の参照符号を付して説明する。なお、括弧内は、後述する実施形態の参照符号を付したものであるが、本考案はこれに限定されるものではない。 Next, effects of the present invention will be described with reference numerals in the drawings. In addition, although the code | symbol in a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

請求項１の考案によれば、介助者（３０）が車椅子（１０）の手押しハンドル（１３）を手（３１）で把持した状態で操作部（６）を足（３２）で踏み込み操作した際、操作部（６）及び１対の屈曲部（３）が回動し、１対の第１角部（３ｅ）が階段（２０）の下段側踏面（２１）に接触して支点となり、車椅子（１０）が上方かつ後方に持ち上げられるから、介助者（３０）が足（３２）で踏み込み操作する操作部（６）が力点となる。しかるに、てこの原理によって、介助者（３０）は従来よりも小さい力で車椅子（１０）を持ち上げることができることとなり、もって、１人の介助者（３０）が車椅子（１０）を階段（２０）の下階から上階に容易に移動させることができる。 According to the invention of claim 1, when the assistant (30) depresses the operation part (6) with the foot (32) while holding the handwheel (13) of the wheelchair (10) with the hand (31). The operating portion (6) and the pair of bent portions (3) rotate, and the pair of first corner portions (3e) contact the lower tread surface (21) of the staircase (20) to serve as a fulcrum. Since (10) is lifted upward and rearward, the operation part (6) on which the assistant (30) depresses with the foot (32) acts as a power point. However, according to the lever principle, the assistant (30) can lift the wheelchair (10) with a smaller force than before, so that one assistant (30) moves the wheelchair (10) down the stairs (20). It can be easily moved from the lower floor to the upper floor.

さらに、請求項１の考案によれば、介助者（３０）が階段（２０）の上段側踏面（２２）に接触した操作部（６）を足（３２）で踏み込み操作した状態で、手押しハンドル（１３）を手（３１）で上方かつ後方に引き上げ操作することによって、階段（２０）の上段側踏面（２２）に接触した操作部（６）が支点となり、車椅子（１０）の駆動輪（１２）が階段（２０）の上段側踏面（２２）に乗り上げて移動することとなるから、介助者（３０）が手（３１）で上方かつ後方に引き上げ操作する手押しハンドル（１３）が力点となる。しかるに、てこの原理によって、介助者（３０）は従来よりもさらに小さい力で車椅子（１０）を持ち上げることができることとなり、もって、１人の介助者（３０）が車椅子（１０）を階段（２０）の下階から上階にさらに容易に移動させることができる。 Further, according to the first aspect of the present invention, in the state where the assistant (30) depresses the operation portion (6) in contact with the upper step surface (22) of the stairs (20) with the foot (32), the hand handle By pulling up (13) upward and backward with the hand (31), the operation part (6) in contact with the upper step surface (22) of the stairs (20) serves as a fulcrum, and the driving wheel ( 12) rides on the upper tread surface (22) of the stairs (20) and moves. Therefore, the push handle (13) that the assistant (30) pulls up with the hand (31) upwards and backwards is the power point. Become. However, according to the lever principle, the assistant (30) can lift the wheelchair (10) with a smaller force than before, so that one assistant (30) moves the wheelchair (10) down the stairs (20). ) Can be moved more easily from the lower floor to the upper floor.

さらにまた、請求項１の考案によれば、操作部（６）が階段（２０）の上段側踏面（２２）に接触した際、車椅子（１０）が上方かつ後方に移動することによって、１対の第１ヒンジ部（４）が内側所定位置まで折れ曲がると共に、１対の第１腕部（３ａ）の一端部の外側への回転を規制することにより、車椅子（１０）がその場で停止して安定状態となる。これにより、介助者（３０）がバランスを崩し、車椅子（１０）が大きく揺動することがなくなり、もって、車椅子（１０）の転倒を低減させることができる。 Furthermore, according to the invention of claim 1, when the operation part (6) contacts the upper step surface (22) of the stairs (20), the wheelchair (10) moves upward and rearward, thereby The first hinge portion (4) is bent to a predetermined position on the inner side, and the wheelchair (10) is stopped on the spot by restricting the rotation of one end of the pair of first arm portions (3a) to the outside. And become stable. Thereby, a helper (30) loses balance and a wheelchair (10) does not rock | fluctuate largely, Therefore A fall of a wheelchair (10) can be reduced.

請求項２の考案によれば、１対の第２腕部（３ｂ）の中間部に設けられた１対の第２ヒンジ部（５）は、１対の第１ヒンジ部（４）が内側所定位置まで折れ曲がっている際、車椅子（１０）を上方かつ後方に移動させると、内側所定位置まで折れ曲がってなるから、車椅子（１０）が介助者（３０）に近い位置で停止して安定状態となる。これにより、介助者（３０）が車椅子（１０）に着座している使用者（４０）の体重をしっかりと支えられることができることとなるため、車椅子（１０）の転倒を低減させることができる。 According to the second aspect of the present invention, the pair of second hinge portions (5) provided in the middle portion of the pair of second arm portions (3b) is the inner side of the pair of first hinge portions (4). When the wheelchair (10) is moved upward and backward when it is bent to a predetermined position, the wheelchair (10) is bent to the predetermined position on the inside, so that the wheelchair (10) stops at a position close to the assistant (30) and is in a stable state. Become. Thereby, since the assistant (30) can support the weight of the user (40) seated on the wheelchair (10), the fall of the wheelchair (10) can be reduced.

請求項３の考案によれば、車椅子移動補助装置（１）は、操作部（６）を後部フレーム（バックパイプ１１ａ）に向けて付勢する付勢手段（コイルばね７）をさらに備えているから、介助者（３０）が階段（２０）の上段側踏面（２２）に接触した操作部（６）から足（３２）を離間するだけで、付勢部材（コイルばね７）によって、操作部（６）を、後部フレーム（バックパイプ１１ａ）に近接する位置、すなわち、介助者（３０）が足（３２）で踏み込み操作する以前の初期位置に復帰させることができる。これにより、１人の介助者（３０）が車椅子（１０）を階段（２０）の下階から上階にさらに容易に移動させることができる。 According to the invention of claim 3, the wheelchair movement assist device (1) further includes urging means (coil spring 7) for urging the operation portion (6) toward the rear frame (back pipe 11a). From the operation part (6) where the assistant (30) is in contact with the upper tread surface (22) of the stairs (20), the operation part is moved by the biasing member (coil spring 7). (6) can be returned to the position close to the rear frame (back pipe 11a), that is, the initial position before the assistant (30) steps on the foot (32). Thereby, one assistant (30) can move the wheelchair (10) from the lower floor of the stairs (20) to the upper floor more easily.

本考案の一実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示する背面図である。It is a rear view which illustrates the state where the wheelchair movement auxiliary device concerning one embodiment of the present invention was attached to the wheelchair. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示し、車椅子の駆動輪を階段の上段側段鼻に接触させた状態を示す側面図である。It is a side view which shows the state which attached the wheelchair movement auxiliary device concerning the embodiment to the wheelchair, and made the wheel of a wheelchair contact the upper stage side nose of the stairs. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示し、介助者が車椅子の手押しハンドルを手で把持した状態で操作部を足で踏み込み操作した状態を示す側面図である。It is the side view which shows the state which illustrated the state which attached the wheelchair movement assistance apparatus which concerns on the embodiment to the wheelchair, and the assistant stepped on the operation part with the foot in the state which hold | gripped the handwheel handle of the wheelchair by hand. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示し、操作部が階段の上段側踏面に接触した状態を示す側面図である。It is a side view which shows the state where the wheelchair movement auxiliary device concerning the embodiment was attached to the wheelchair, and the operation part contacted the upper step side tread of the stairs. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示し、介助者が階段の上段側踏面に接触した操作部を足で踏み込み操作した状態で、手押しハンドルを手で上方かつ後方に引き上げ操作した状態を示す側面図である。The wheelchair movement assistance device according to the embodiment is illustrated as being attached to a wheelchair, and the assistant pushes the push handle upward and backward with his / her hand while stepping on the operation unit that touches the upper stepped surface of the stairs. It is a side view which shows the state which pulled up. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示し、車椅子の駆動輪が階段の上段側踏面に乗り上げて移動した状態を示す側面図である。It is a side view which shows the state which illustrated the state which attached the wheelchair movement auxiliary device concerning the embodiment to the wheelchair, and the wheel of the wheelchair got on the upper step side tread of the stairs, and moved. 同実施形態に係る車椅子移動補助装置を車椅子に取り付けた状態を例示する斜視図である。It is a perspective view which illustrates the state where the wheelchair movement auxiliary device concerning the embodiment was attached to the wheelchair. 同実施形態に係る車椅子移動補助装置の第１ヒンジ部及び第２ヒンジ部を例示し、（ａ）は、第１ヒンジ部及び第２ヒンジ部の斜視図であり、（ｂ）は、その縦断面図であり、（ｃ）は、その横断面図である。The 1st hinge part and the 2nd hinge part of the wheelchair movement auxiliary device concerning the embodiment are illustrated, (a) is a perspective view of the 1st hinge part and the 2nd hinge part, (b) is the longitudinal section It is a top view, (c) is the cross-sectional view. 同実施形態に係る車椅子移動補助装置の屈曲部の第２角部を背面側から見た斜視図である。It is the perspective view which looked at the 2nd corner | angular part of the bending part of the wheelchair movement assistance apparatus which concerns on the embodiment from the back side.

以下に、本考案に係る車椅子移動補助装置の一実施形態について、図面を参照して具体的に説明する。なお、以下の説明において、上下左右の方向を示す場合は、図示正面から見た場合の上下左右をいうものとする。 Below, one embodiment of a wheelchair movement auxiliary device concerning the present invention is described concretely with reference to drawings. In addition, in the following description, when showing the direction of up, down, left and right, it means up, down, left and right when viewed from the front of the figure.

図２〜図６に示すように、車椅子移動補助装置１は、車椅子１０を階段２０の下階から上階へ移動させる際の補助装置であって、図１〜図７に示すように、車椅子１０に回転可能に取り付け固定されるものである。なお、本実施形態に示す車椅子１０は、例えば、ＪＩＳ（日本工業規格）Ｔ９２０１（手動車椅子）に準拠して製造された自走式の車椅子であって、要介護者、身体障害者、傷病者等の使用者４０が着座した状態で、使用者４０による駆動輪１２の回転操作又は介助者３０による手押しハンドル１３の押引操作によって移動できる従来周知のものである。なおまた、図１は、車椅子１０を後側から見た背面図であり、図２〜図６は、車椅子１０を右側から見た側面図であって、図２〜図６の右側が、車椅子１０の前側であり、図２〜図６の左側が、車椅子１０の後側である。 As shown in FIGS. 2 to 6, the wheelchair movement assisting device 1 is an assisting device for moving the wheelchair 10 from the lower floor to the upper floor of the stairs 20, and as shown in FIGS. 10 is rotatably attached and fixed. In addition, the wheelchair 10 shown in this embodiment is a self-propelled wheelchair manufactured according to JIS (Japanese Industrial Standards) T9201 (manual wheelchair), for example, a care recipient, a disabled person, a disabled person. In the state in which the user 40 is seated, the user 40 can move by rotating the driving wheel 12 by the user 40 or by pushing and pulling the push handle 13 by the assistant 30. 1 is a rear view of the wheelchair 10 as viewed from the rear side, and FIGS. 2 to 6 are side views of the wheelchair 10 as viewed from the right side. The right side of FIGS. 10, and the left side of FIGS. 2 to 6 is the rear side of the wheelchair 10.

車椅子移動補助装置１は、図１，図２，図７に示すように、車椅子１０の１対のベースパイプ１１ｂに固定される軸部２と、一端部が軸部２に回転可能に連結される１対の第１腕部３ａと、一端部が１対の第１腕部３ａの他端部の内側に屈曲して接続される１対の第２腕部３ｂと、一端部が１対の第２腕部３ｂの他端部の内側に屈曲して接続される１対の第３腕部３ｃと、一端部が１対の第３腕部３ｃの他端部の外側に屈曲して接続され、他端部が車椅子１０のバックパイプ１１ａの後方に設けられる１対の第４腕部３ｄと、を有する側面視柄杓形状の１対の屈曲部３と、１対の第１腕部３ａの中間部に設けられ、内側に折れ曲がり可能かつ外側に折れ曲がり不能となる１対の第１ヒンジ部４と、１対の第２腕部３ｂの中間部に設けられ、内側に折れ曲がり可能かつ外側に折れ曲がり不能となる１対の第２ヒンジ部５と、１対の第４腕部３ｄの他端部を連結するように、１対の第４腕部３ｄの他端部の側方に屈曲して接続され、図３に示すように、介助者３０が足３２で踏み込み操作することによって、バックパイプ１１ａの後方から階段２０の上段側踏面２２に向けて回動可能な操作部６と、一端部が１対の第３腕部３ｃに連結され、他端部がバックパイプ１１ａに連結され、操作部６をバックパイプ１１ａに向けて付勢するコイルばね７（付勢部材）と、を備える。 As shown in FIGS. 1, 2 and 7, the wheelchair movement assisting apparatus 1 has a shaft portion 2 fixed to a pair of base pipes 11b of the wheelchair 10 and one end portion rotatably connected to the shaft portion 2. A pair of first arm portions 3a, a pair of second arm portions 3b whose one end portion is bent and connected to the inside of the other end portion of the pair of first arm portions 3a, and a pair of one end portions. A pair of third arm portions 3c that are bent and connected to the inside of the other end portion of the second arm portion 3b, and one end portion is bent to the outside of the other end portion of the pair of third arm portions 3c. A pair of fourth arm portions 3d connected at the other end to the rear of the back pipe 11a of the wheelchair 10, and a pair of bent portions 3 in a side-view heel shape, and a pair of first arm portions 3a, provided at an intermediate portion between a pair of first hinge portions 4 that can be bent inward and cannot be bent outward, and a pair of second arm portions 3b. The other end portion of the pair of fourth arm portions 3d so as to connect the other end portion of the pair of fourth arm portions 3d and the pair of second hinge portions 5 that can be bent inwardly and cannot be bent outward. As shown in FIG. 3, the assistant 30 can step on the foot 32 to turn the back pipe 11a toward the upper stage tread 22 from the back of the back pipe 11a. A coil spring 7 (biased) that biases the operating portion 6 toward the back pipe 11a, with the operating portion 6 and one end connected to the pair of third arm portions 3c, the other end connected to the back pipe 11a. Member).

軸部２は、鉄、ステンレス、チタン、アルミニウム等の金属製のパイプからなる背面視コ字形状のものであり、図１，図２，図７に示すように車椅子１０の１対のベースパイプ１１ｂの後側下部に溶接により固定される１対の縦軸部２ａと、１対の縦軸部２ａの下端部が、図７に示すように、側方に直角に折れ曲がって接続される横軸部２ｂと、横軸部２ｂの外周部の左右方向の中央部に挿通されている、円筒状の位置決め部材２ｃと、を有している。なお、１対の縦軸部２ａの長さは、例えば、５ｃｍ、横軸部２ｂの長さは、例えば、４０ｃｍとなるように形成されており、図２に示すように、軸部２は、使用者４０が着座した車椅子１０の重心（例えば、１対のシートパイプ１１ｃの左右方向の中心）よりも後方、かつ駆動輪１２の駆動軸１２ａよりも前方となる、１対のベースパイプ１１ｂの後側下部に固定されている。 The shaft portion 2 has a U-shaped rear view made of a metal pipe such as iron, stainless steel, titanium, or aluminum, and a pair of base pipes of the wheelchair 10 as shown in FIGS. A pair of vertical axis portions 2a fixed to the rear lower portion of 11b by welding and a lower end portion of the pair of vertical axis portions 2a are bent and connected at right angles to the side as shown in FIG. It has a shaft portion 2b and a cylindrical positioning member 2c that is inserted through the central portion in the left-right direction of the outer peripheral portion of the horizontal shaft portion 2b. The length of the pair of vertical axis portions 2a is, for example, 5 cm, and the length of the horizontal axis portion 2b is, for example, 40 cm. As shown in FIG. The pair of base pipes 11b that are located behind the center of gravity of the wheelchair 10 on which the user 40 is seated (for example, the center in the left-right direction of the pair of seat pipes 11c) and forward of the drive shaft 12a of the drive wheels 12. It is fixed to the lower rear side.

１対の屈曲部３は、図１，図２，図７に示すように、１対の一端部が軸部２の横軸部２ｂに回転可能に連結され、１対の他端部が操作部６を介して一体的に接続され、鉄、ステンレス、チタン、アルミニウム等の金属製のパイプからなる側面視柄杓形状となるように屈曲したフォークパイプである。 As shown in FIGS. 1, 2, and 7, the pair of bent portions 3 has a pair of one end portions rotatably connected to the horizontal shaft portion 2 b of the shaft portion 2, and the pair of other end portions are operated. It is a fork pipe that is integrally connected via the part 6 and bent so as to have a side-view collar shape made of a metal pipe such as iron, stainless steel, titanium, or aluminum.

ところで、このような一対の屈曲部３は、上述したように、１対の第１腕部３ａと、１対の第２腕部３ｂと、１対の第３腕部３ｃと、１対の第４腕部３ｄと、を有している。 By the way, as described above, the pair of bent portions 3 includes a pair of first arm portions 3a, a pair of second arm portions 3b, a pair of third arm portions 3c, and a pair of And a fourth arm portion 3d.

この１対の第１腕部３ａは、図７に示すように、横軸部２ｂの外周部に回転可能に装着される円筒状の１対の回転支持部３ａ１と、一端部が１対の回転支持部３ａ１の左右方向の中間部に直交するように固定される１対の小径筒部３ａ２と、一端部が１対の小径筒部３ａ２の他端部に１対の第１ヒンジ部４を介して連結される１対の大径筒部３ａ３と、を有している。なお、１対の回転支持部３ａ１は、位置決め部材２ｃの両端部と１対の縦軸部２ａの両側部との間に配置され、両側方への移動が規制されることによって位置決めされている。 As shown in FIG. 7, the pair of first arm portions 3a includes a pair of cylindrical rotation support portions 3a1 rotatably attached to the outer peripheral portion of the horizontal shaft portion 2b, and a pair of one end portions. A pair of small-diameter cylindrical portions 3a2 that are fixed so as to be orthogonal to the intermediate portion in the left-right direction of the rotation support portion 3a1, and a pair of first hinge portions 4 that have one end at the other end of the pair of small-diameter cylindrical portions 3a2. And a pair of large-diameter cylindrical portions 3a3 connected to each other. The pair of rotation support portions 3a1 are disposed between both end portions of the positioning member 2c and both side portions of the pair of longitudinal axis portions 2a, and are positioned by restricting movement to both sides. .

一方、１対の第２腕部３ｂは、図７に示すように、一端部が１対の大径筒部３ａ３の他端部に固定される１対の小径筒部３ｂ１と、１対の小径筒部３ｂ１の他端部に１対の第２ヒンジ部５を介して連結される大径筒部３ｂ２と、を有している。 On the other hand, as shown in FIG. 7, the pair of second arm portions 3b includes a pair of small diameter cylindrical portions 3b1 whose one end is fixed to the other end of the pair of large diameter cylindrical portions 3a3, and a pair of second arm portions 3b. A large-diameter cylindrical portion 3b2 connected to the other end of the small-diameter cylindrical portion 3b1 via a pair of second hinge portions 5.

かくして、上記のように構成される一対の屈曲部３のうち、１対の第１腕部３ａの小径筒部３ａ２及び大径筒部３ａ３は、図８に示すように、１対の第２腕部３ｂの小径筒部３ｂ１及び大径筒部３ｂ２と同一構成となっており、１対の第１腕部３ａの小径筒部３ａ２，１対の第１腕部３ａの大径筒部３ａ３，１対の第２腕部３ｂの小径筒部３ｂ１，１対の第２腕部３ｂの大径筒部３ｂ２は、同一長さ（例えば、１０．５ｃｍ）となるように形成されている。そして、一対の第１腕部３ａ，１対の第２腕部３ｂ，１対の第３腕部３ｃ，１対の第４腕部３ｄも、同一長さ（例えば、２１ｃｍ）となるように形成されている。 Thus, among the pair of bent portions 3 configured as described above, the small-diameter cylindrical portion 3a2 and the large-diameter cylindrical portion 3a3 of the pair of first arm portions 3a are, as shown in FIG. It has the same configuration as the small diameter cylindrical portion 3b1 and the large diameter cylindrical portion 3b2 of the arm portion 3b, and the small diameter cylindrical portion 3a2 of the pair of first arm portions 3a and the large diameter cylindrical portion 3a3 of the pair of first arm portions 3a. The small diameter cylindrical portion 3b1 of the pair of second arm portions 3b and the large diameter cylindrical portion 3b2 of the pair of second arm portions 3b are formed to have the same length (for example, 10.5 cm). The pair of first arm portions 3a, the pair of second arm portions 3b, the pair of third arm portions 3c, and the pair of fourth arm portions 3d also have the same length (for example, 21 cm). Is formed.

一方、１対の第１腕部３ａの他端部と１対の第２腕部３ｂの一端部との間には、図７に示すように、内側に屈曲する１対の第１角部３ｅが設けられ、１対の第２腕部３ｂの他端部と１対の第３腕部３ｃの一端部との間には、内側に屈曲する１対の第２角部３ｆが設けられ、１対の第３腕部３ｃの他端部と１対の第４腕部３ｄの一端部との間には、外側に屈曲する１対の１対の第３角部３ｇが設けられている。 On the other hand, between the other end of the pair of first arms 3a and one end of the pair of second arms 3b, a pair of first corners bent inward as shown in FIG. 3e is provided, and a pair of second corners 3f bent inward are provided between the other end of the pair of second arms 3b and one end of the pair of third arms 3c. Between the other end portion of the pair of third arm portions 3c and one end portion of the pair of fourth arm portions 3d, a pair of third corner portions 3g that are bent outward are provided. Yes.

ところで、この１対の第２角部３ｆは、図７及び図９に示すように、外側面に矩形状に形成された切り欠き３ｆ１と、切り欠き３ｆ１から臨む内部空間において左右方向に延びるように、左右両側部に固定された軸部３ｆ２と、切り欠き３ｆ１から外方に突出するように、軸部３ｆ２に回転自在に支持されたキャスタ３ｆ３と、を有している。なお、このキャスタ３ｆ３は、後述する、図６に示すように、介助者３０が階段２０の上段側踏面２２に接触した操作部６から足３２を離間し、コイルばね７によって、操作部６をバックパイプ１１ａに近接する初期位置に復帰させるとき、階段２０の上段側段鼻２２ａに滑らかに接触しながら移動するコロ（ベアリング）である。 By the way, as shown in FIGS. 7 and 9, the pair of second corners 3f extends in the left-right direction in a notch 3f1 formed in a rectangular shape on the outer surface and an internal space facing the notch 3f1. In addition, a shaft portion 3f2 fixed to the left and right side portions and a caster 3f3 rotatably supported by the shaft portion 3f2 so as to protrude outward from the notch 3f1 are provided. As shown in FIG. 6, which will be described later, the caster 3 f 3 separates the foot 32 from the operation unit 6 in which the assistant 30 contacts the upper tread surface 22 of the stairs 20, and the operation unit 6 is moved by the coil spring 7. When returning to the initial position close to the back pipe 11a, this is a roller (bearing) that moves while smoothly contacting the upper step nose 22a of the stairs 20.

１対の第１ヒンジ部４及び１対の第２ヒンジ部５は、同一の構成となっており、図１，図２，図７に示すように、１対の第１腕部３ａ及び１対の第２腕部３ｂの中間部に設けられ、内側に折れ曲がり可能かつ外側に折れ曲がり不能となるヒンジジョイント（肘関節）である。より詳しく説明すると、１対の第１ヒンジ部４及び１対の第２ヒンジ部５は、図８に示すように、１対の第１腕部３ａの大径筒部３ａ３及び１対の第２腕部３ｂの大径筒部３ｂ２の一端開口部に、１対の第１腕部３ａの小径筒部３ａ２及び１対の第２腕部３ｂの小径筒部３ｂ１の他端部を折れ曲がり自在に装着するものであって、１対の大径筒部３ａ３，３ｂ２の側部に固定され、１対の小径筒部３ａ２，３ｂ１が回転自在に支持される１対の軸部４ａ，５ａと、１対の大径筒部３ａ３，３ｂ２の一端開口部の内側に設けられ、１対の小径筒部３ａ２，３ｂ１が当接して４５度を超える内側の回転を規制する１対の内側当接部４ｂ，５ｂと、１対の大径筒部３ａ３，３ｂ２の一端開口部の外側に突出して設けられ、１対の小径筒部３ａ２，３ｂ１が当接して外側への回転を規制する１対の外側当接部４ｃ，５ｃと、を有している。なお、１対の小径筒部３ａ２，３ｂ１は、図８（ａ），図８（ｂ）に２点鎖線で示すように、１対の小径筒部３ａ２，３ｂ１を内側に４５度回転（矢印参照）させたとき、１対の小径筒部３ａ２，３ｂ１が内側当接部４ｂ，５ｂに当接して、４５度を超える内側の回転が規制され、図８（ａ）〜図８（ｃ）に実線で示すように、１対の小径筒部３ａ２，３ｂ１が回転していないとき、１対の小径筒部３ａ２，３ｂ１が外側当接部４ｃ，５ｃに当接して、外側の回転が規制されるようになっている。 The pair of first hinge portions 4 and the pair of second hinge portions 5 have the same configuration, and as shown in FIGS. 1, 2, and 7, a pair of first arm portions 3a and 1 It is a hinge joint (elbow joint) that is provided at an intermediate portion of the pair of second arm portions 3b and can be bent inward and cannot be bent outward. More specifically, as shown in FIG. 8, the pair of first hinge portions 4 and the pair of second hinge portions 5 are composed of a large-diameter cylindrical portion 3a3 and a pair of first arm portions 3a. The one end opening of the large-diameter cylindrical portion 3b2 of the two-arm portion 3b can be bent at the other end of the small-diameter cylindrical portion 3b1 of the pair of first arm portions 3a and the small-diameter cylindrical portion 3b1 of the pair of second arm portions 3b. A pair of shaft portions 4a and 5a fixed to the side portions of the pair of large-diameter cylindrical portions 3a3 and 3b2 and supported by the pair of small-diameter cylindrical portions 3a2 and 3b1 so as to be rotatable. A pair of inner abutments that are provided inside one end openings of a pair of large diameter cylindrical portions 3a3, 3b2 and that a pair of small diameter cylindrical portions 3a2, 3b1 abut against each other to restrict inner rotation exceeding 45 degrees Portions 4b, 5b and a pair of large-diameter cylindrical portions 3a3, 3b2 provided to protrude outside one end openings, and a pair of small-diameter cylindrical portions 3a2, 3 A pair of outer abutment portion 4c 1 regulates the rotation of the outer contact has a 5c, the. The pair of small-diameter cylindrical portions 3a2 and 3b1 rotate the pair of small-diameter cylindrical portions 3a2 and 3b1 45 degrees inward (arrows) as shown by two-dot chain lines in FIGS. 8 (a) and 8 (b). 8), the pair of small-diameter cylindrical portions 3a2 and 3b1 come into contact with the inner contact portions 4b and 5b, and the inner rotation exceeding 45 degrees is restricted, and FIGS. 8 (a) to 8 (c). As shown by the solid line, when the pair of small diameter cylindrical portions 3a2 and 3b1 are not rotating, the pair of small diameter cylindrical portions 3a2 and 3b1 are in contact with the outer contact portions 4c and 5c, and the outer rotation is restricted. It has come to be.

操作部６は、図１，図２，図７に示すように、１対の第４腕部３ｄの他端部を連結するように、１対の第４腕部３ｄの他端部の側方に屈曲して一体的に接続され、鉄、ステンレス、チタン、アルミニウム等の金属製のパイプからなるものであって、図３に示すように、介助者３０が足３２で踏み込み操作する操作レバーである。なお、図７に示すように、操作部６は、１本のパイプを屈曲することによって、１対の第４腕部３ｄ，１対の第３腕部３ｃ，１対の第２腕部３ｂの大径筒部３ｂ２と一体形成されたものであり、長さが、例えば、１６ｃｍとなるように形成されている。 As shown in FIGS. 1, 2, and 7, the operation unit 6 is connected to the other end of the pair of fourth arms 3 d so as to connect the other ends of the pair of fourth arms 3 d. The operation lever is formed of a pipe made of metal such as iron, stainless steel, titanium, aluminum, etc., and is operated integrally by an assistant 30 with a foot 32 as shown in FIG. It is. As shown in FIG. 7, the operation unit 6 bends one pipe, thereby bending a pair of fourth arms 3d, a pair of third arms 3c, and a pair of second arms 3b. The large-diameter cylindrical portion 3b2 is integrally formed with a length of, for example, 16 cm.

コイルばね７は、図１，図２，図７に示すように、操作部６をバックパイプ１１ａに近接する初期位置に復帰させる付勢部材である。より詳しく説明すると、コイルばね７は、一端部が１対の第３腕部３ｃの側部に固定された第１係止部Ｂａに連結され、他端部がバックパイプ１１ａの後部に固定された第２係止部Ｂｂに連結され、操作部６をバックパイプ１１ａに向けて付勢するばね部材である。なお、この第１係止部Ｂａ及び第２係止部Ｂｂは、１対の第３腕部３ｃの側部及びバックパイプ１１ａの後部に螺着して固定したボルトであって、コイルばね７の両端部に形成された鉤状部を係止するものである。 As shown in FIGS. 1, 2, and 7, the coil spring 7 is a biasing member that returns the operating portion 6 to an initial position close to the back pipe 11a. More specifically, the coil spring 7 has one end connected to the first locking portion Ba fixed to the side of the pair of third arms 3c, and the other end fixed to the rear portion of the back pipe 11a. The spring member is connected to the second locking portion Bb and biases the operating portion 6 toward the back pipe 11a. The first locking portion Ba and the second locking portion Bb are bolts that are screwed and fixed to the side portions of the pair of third arm portions 3c and the rear portion of the back pipe 11a. The hook-shaped part formed in the both ends of this is latched.

かくして、上記の構成される車椅子移動補助装置１は、車椅子１０を階段２０の下階から上階へ移動させるとき、次のように使用される。この点、図２〜図６を参照しながら、詳細に説明する。 Thus, the wheelchair movement assist apparatus 1 configured as described above is used as follows when the wheelchair 10 is moved from the lower floor to the upper floor of the stairs 20. This point will be described in detail with reference to FIGS.

まず、図２に示すように、車椅子１０を階段２０に対して後ろ向きとなるように配置する。 First, as shown in FIG. 2, the wheelchair 10 is arranged so as to face backward with respect to the stairs 20.

次いで、介助者３０の足３２を階段２０の上段側踏面２２に載置し、介助者３０の手３１で把持した手押しハンドル１３を後方に引き込み操作することによって、車椅子１０の駆動輪１２を階段２０の上段側段鼻２２ａに接触させる。 Next, the foot 32 of the assistant 30 is placed on the upper tread surface 22 of the stairs 20, and the push handle 13 gripped by the hand 31 of the assistant 30 is pulled backward to operate the driving wheel 12 of the wheelchair 10 on the stairs. 20 is brought into contact with the upper nose 22a.

次いで、図３に示すように、介助者３０が車椅子１０の手押しハンドル１３を手３１で把持した状態で操作部６を足３２で踏み込み操作すると、操作部６及び１対の屈曲部３が回動し、１対の第１角部３ｅが階段２０の下段側踏面２１に接触して支点となり、車椅子１０が上方かつ後方に持ち上げられる。 Next, as illustrated in FIG. 3, when the assistant 30 steps on the operation unit 6 with the foot 32 while holding the handwheel 13 of the wheelchair 10 with the hand 31, the operation unit 6 and the pair of bent portions 3 are rotated. The pair of first corners 3e come into contact with the lower tread surface 21 of the stairs 20 to become a fulcrum, and the wheelchair 10 is lifted upward and rearward.

次いで、図４に示すように、介助者３０が車椅子１０の手押しハンドル１３を手３１で把持した状態で操作部６を足３２でさらに踏み込み操作すると、操作部６が階段２０の上段側踏面２２に接触し、車椅子１０が上方かつ後方に移動することによって、１対の第１ヒンジ部４が内側所定位置（折れ曲がり角度が４５度となる位置）まで折れ曲がり、車椅子１０が停止して安定状態となる。 Next, as illustrated in FIG. 4, when the assistant 30 further depresses the operation unit 6 with the foot 32 while holding the handwheel 13 of the wheelchair 10 with the hand 31, the operation unit 6 causes the upper side tread 22 of the stairs 20 to rise. And the wheelchair 10 moves upward and rearward, whereby the pair of first hinge parts 4 bends to a predetermined position on the inside (a position where the bending angle is 45 degrees), and the wheelchair 10 stops and is in a stable state. Become.

この点、より詳しく説明すると、図４に示すように、１対の第１角部３ｅ，１対の第２角部３ｆ，１対の１対の第３角部３ｇの屈曲角度は、１３５度未満（例えば、１２０度）となっている。そして、１対の第１ヒンジ部４及び１対の第２ヒンジ部５の折れ曲がり角度は、上述したように、４５度となっていることから、図４に示すように、１対の第２腕部３ｂが下段側踏面２１に接触した状態で１対の第１ヒンジ部４が折れ曲がったとき、下段側踏面２１に対する１対の第１ヒンジ部４の折れ曲がり角度が、（１８０度−１対の第１角部３ｅの屈曲角度）＋（１対の第１ヒンジ部４の折れ曲がり角度）＝（１８０度−１２０度）＋（４５度）＝１０５度となる。これにより、車椅子１０が上方かつ後方（図４の左上方向）に移動することとなる。 More specifically, as shown in FIG. 4, the bending angle of the pair of first corners 3e, the pair of second corners 3f, and the pair of third corners 3g is 135. It is less than 120 degrees (for example, 120 degrees). Since the bending angle of the pair of first hinge parts 4 and the pair of second hinge parts 5 is 45 degrees as described above, as shown in FIG. When the pair of first hinge portions 4 is bent in a state where the arm portion 3b is in contact with the lower tread surface 21, the bending angle of the pair of first hinge portions 4 with respect to the lower tread surface 21 is (180 degrees minus one pair). Of the first corner 3e) + (bending angle of the pair of first hinges 4) = (180 degrees−120 degrees) + (45 degrees) = 105 degrees. As a result, the wheelchair 10 moves upward and rearward (upper left direction in FIG. 4).

また、図４に示すように、１対の第１ヒンジ部４が内側所定位置（折れ曲がり角度が４５度となる位置）まで折れ曲がると、１対の小径筒部３ａ２の外側への回転が１対の第１ヒンジ部４の１対の外側当接部４ｃによって規制されるから、車椅子１０がその場で停止して安定状態となる。 As shown in FIG. 4, when the pair of first hinge portions 4 are bent to a predetermined position on the inner side (a position at which the bending angle is 45 degrees), the pair of small-diameter cylindrical portions 3a2 is rotated by one pair. Therefore, the wheelchair 10 stops on the spot and becomes stable.

次いで、図４に示す状態から、図５に示すように、介助者３０が階段２０の上段側踏面２２に接触した操作部６を足３２で踏み込み操作した状態で、手押しハンドル１３を手３１で上方かつ後方に引き上げ操作すると、車椅子１０が上方かつ後方に移動して、１対の第１ヒンジ部４に加え、さらに、１対の第２ヒンジ部５が内側所定位置（折れ曲がり角度が４５度となる位置）に折れ曲がり、車椅子１０が介助者３０に近い位置、すなわち、階段２０の上段側段鼻２２ａに近い位置で停止して安定状態となる。この点、より詳しく説明すると、１対の第１ヒンジ部４が内側所定位置（折れ曲がり角度が４５度となる位置）まで折れ曲がると、１対の小径筒部３ａ２の外側への回転が１対の第１ヒンジ部４の１対の外側当接部４ｃによって規制されるから、車椅子１０がその場で停止して安定状態となる。しかしながら、１対の第２ヒンジ部５がない場合、１対の第１ヒンジ部４は、図５に示すような位置（介助者３０に近い位置、すなわち、階段２０の上段側段鼻２２ａに近い位置）まで移動することができない。してみると、１対の第２ヒンジ部５がない場合、車椅子１０が介助者３０から離れた位置で停止することとなり、もって、介助者３０が車椅子１０に着座している使用者４０の体重を支えきれず、手押しハンドル１３を手放し、車椅子１０が転倒する可能性がある。 Next, from the state shown in FIG. 4, as shown in FIG. 5, in the state where the assistant 30 has stepped on the operation unit 6 in contact with the upper tread surface 22 of the stairs 20 with the foot 32, the hand handle 13 is moved with the hand 31. When the pulling operation is performed upward and backward, the wheelchair 10 moves upward and backward, and in addition to the pair of first hinge portions 4, the pair of second hinge portions 5 is further moved to a predetermined position on the inner side (the bending angle is 45 degrees). And the wheelchair 10 stops at a position close to the assistant 30, that is, a position close to the upper nose 22 a of the upper stairs 20, and becomes stable. This point will be described in more detail. When the pair of first hinge portions 4 are bent to a predetermined position on the inner side (a position at which the bending angle is 45 degrees), the pair of small-diameter cylindrical portions 3a2 is rotated to the outer pair. Since it is regulated by the pair of outer abutment portions 4c of the first hinge portion 4, the wheelchair 10 stops on the spot and becomes stable. However, when the pair of second hinge portions 5 is not provided, the pair of first hinge portions 4 is positioned as shown in FIG. 5 (position close to the assistant 30, that is, close to the upper stage nose 22 a of the stairs 20. Cannot move to (position). As a result, if there is no pair of second hinge portions 5, the wheelchair 10 stops at a position away from the assistant 30, and thus the assistant 40 is seated on the wheelchair 10. There is a possibility that the wheelchair 10 may fall because the weight cannot be supported and the handwheel 13 is released.

それゆえ、本実施形態においては、車椅子１０が介助者３０に近い位置、すなわち、階段２０の上段側段鼻２２ａに近い位置で停止させ、介助者３０が車椅子１０に着座している使用者４０の体重をしっかりと支えられるようにするため、１対の第２ヒンジ部５を設け、内側所定位置（折れ曲がり角度が４５度となる位置）まで折れ曲がるようにし、１対の第１ヒンジ部４が図５に示すような位置にくるようにしている。これにより、車椅子１０を介助者３０に近い位置、すなわち、階段２０の上段側段鼻２２ａに近い位置で停止させることができ、もって、介助者３０が車椅子１０に着座している使用者４０の体重をしっかりと支えられることができることとなるため、車椅子１０の転倒を低減させることができる。 Therefore, in the present embodiment, the wheelchair 10 is stopped at a position close to the assistant 30, that is, at a position close to the upper nose 22 a of the stairs 20, and the assistant 40 is seated on the wheelchair 10. In order to support the weight firmly, a pair of second hinge portions 5 are provided so as to be bent to a predetermined position on the inner side (a position where the bending angle is 45 degrees), and the pair of first hinge portions 4 is illustrated in FIG. The position is as shown in FIG. Accordingly, the wheelchair 10 can be stopped at a position close to the assistant 30, that is, at a position close to the upper nose 22 a of the stairs 20, and thus the weight of the user 40 who is sitting on the wheelchair 10. Since the wheelchair 10 can be firmly supported, the fall of the wheelchair 10 can be reduced.

次いで、車椅子１０が介助者３０に近い位置、すなわち、階段２０の上段側段鼻２２ａに近い位置で停止して安定状態としてから、図５に示すように、介助者３０が階段２０の上段側踏面２２に接触した操作部６を足３２で踏み込み操作した状態で、手押しハンドル１３を手３１で上方かつ後方に引き上げ操作すると、階段２０の上段側踏面２２に接触した操作部６が支点となり、車椅子１０の駆動輪１２が階段２０の上段側踏面２２に乗り上げて移動できることとなる。 Next, after the wheelchair 10 is stopped at a position close to the assistant 30, that is, a position close to the upper step nose 22 a of the stairs 20, and the stable state is reached, as shown in FIG. When the hand push handle 13 is pulled upward and backward with the hand 31 while the operation part 6 in contact with the foot 22 is depressed, the operation part 6 in contact with the upper tread surface 22 of the stairs 20 serves as a fulcrum. The ten driving wheels 12 can ride on the upper tread surface 22 of the stairs 20 and move.

次いで、図６に示すように、介助者３０が階段２０の上段側踏面２２に接触した操作部６から足３２を離間すると、コイルばね７によって、操作部６が、バックパイプ１１ａに近接する位置、すなわち、介助者３０が足３２で踏み込み操作する以前の初期位置に復帰する。 Next, as shown in FIG. 6, when the assistant 30 moves the foot 32 away from the operation unit 6 that has contacted the upper tread surface 22 of the stairs 20, the operation unit 6 is positioned close to the back pipe 11 a by the coil spring 7. That is, the assistant 30 returns to the initial position before the foot 32 is depressed.

かくして、上記のような操作を繰り返すことにより、車椅子１０を階段２０の下階から上階へ移動させることができる。 Thus, the wheelchair 10 can be moved from the lower floor to the upper floor of the stairs 20 by repeating the above operation.

しかして、以上説明した本実施形態によれば、図３に示すように、介助者３０が車椅子１０の手押しハンドル１３を手３１で把持した状態で操作部６を足３２で踏み込み操作した際、操作部６及び１対の屈曲部３が回動し、１対の第１角部３ｅが階段２０の下段側踏面２１に接触して支点となり、車椅子１０が上方かつ後方に持ち上げられるから、介助者３０が足３２で踏み込み操作する操作部６が力点となる。しかるに、てこの原理によって、介助者３０は従来よりも小さい力で車椅子１０を持ち上げることができることとなる。それゆえ、１人の介助者３０が車椅子１０を階段２０の下階から上階に容易に移動させることができることとなる。 Thus, according to the present embodiment described above, as shown in FIG. 3, when the assistant 30 steps on the operation unit 6 with the foot 32 while holding the handwheel 13 of the wheelchair 10 with the hand 31, The operation portion 6 and the pair of bent portions 3 rotate, and the pair of first corner portions 3e come into contact with the lower tread surface 21 of the stairs 20 to become a fulcrum, and the wheelchair 10 is lifted upward and rearward. The operation unit 6 that the person 30 steps on with his / her foot 32 is the power point. However, by the lever principle, the assistant 30 can lift the wheelchair 10 with a smaller force than before. Therefore, one helper 30 can easily move the wheelchair 10 from the lower floor of the stairs 20 to the upper floor.

さらに、本実施形態によれば、図５に示すように、介助者３０が階段２０の上段側踏面２２に接触した操作部６を足３２で踏み込み操作した状態で、手押しハンドル１３を手３１で上方かつ後方に引き上げ操作することによって、階段２０の上段側踏面２２に接触した操作部６が支点となり、車椅子１０の駆動輪１２が階段２０の上段側踏面２２に乗り上げて移動することとなる。これにより、介助者３０が手３１で上方かつ後方に引き上げ操作する手押しハンドル１３が力点となり、介助者３０が足３２で踏み込み操作し、階段２０の上段側踏面２２に接触した操作部６が支点となる。しかるに、てこの原理によって、介助者３０は従来よりもさらに小さい力で車椅子１０を持ち上げることができ、もって、１人の介助者３０が車椅子１０を階段２０の下階から上階にさらに容易に移動させることができることとなる。 Further, according to the present embodiment, as shown in FIG. 5, in the state where the assistant 30 has stepped on the operation unit 6 in contact with the upper tread surface 22 of the stairs 20 with the foot 32, the hand handle 13 is moved with the hand 31. By pulling upward and backward, the operation unit 6 that contacts the upper tread surface 22 of the stairs 20 becomes a fulcrum, and the drive wheel 12 of the wheelchair 10 rides on the upper tread surface 22 of the stairs 20 and moves. As a result, the push handle 13 that the assistant 30 pulls up with the hand 31 upward and backward acts as a power point, the assistant 30 steps down with the foot 32, and the operation unit 6 that contacts the upper tread surface 22 of the stairs 20 is the fulcrum. It becomes. However, due to the lever principle, the assistant 30 can lift the wheelchair 10 with a smaller force than before, so that one assistant 30 can more easily lift the wheelchair 10 from the lower floor to the upper floor of the stairs 20. It can be moved.

さらにまた、本実施形態によれば、図４に示すように、操作部６が階段２０の上段側踏面２２に接触した際、車椅子１０が上方かつ後方に移動することによって、１対の第１ヒンジ部４が内側所定位置まで折れ曲がり、１対の第１腕部３ａの１対の小径筒部３ａ２の外側への回転が規制されることから、車椅子１０が停止して安定状態となる。これにより、介助者３０がバランスを崩し、車椅子１０が大きく揺動することがなくなり、もって、車椅子１０の転倒を低減させることができる。 Furthermore, according to the present embodiment, as shown in FIG. 4, when the operation unit 6 comes into contact with the upper tread surface 22 of the stairs 20, the wheelchair 10 moves upward and rearward, whereby a pair of first The hinge portion 4 is bent to a predetermined position on the inside, and the rotation of the pair of first arm portions 3a to the outside of the pair of small-diameter cylindrical portions 3a2 is restricted, so that the wheelchair 10 is stopped and becomes a stable state. Thereby, the assistant 30 loses the balance and the wheelchair 10 is not greatly swung, so that the fall of the wheelchair 10 can be reduced.

さらにまた、本実施形態によれば、介助者３０が階段２０の上段側踏面２２に接触した操作部６から足３２を離間するだけで、コイルばね７によって、操作部６を、バックパイプ１１ａに近接する位置、すなわち、介助者３０が足３２で踏み込み操作する以前の初期位置に復帰させることができるから、１人の介助者３０が車椅子１０を階段２０の下階から上階にさらに容易に移動させることができる。 Furthermore, according to the present embodiment, the assistant 30 only moves the foot 32 away from the operation portion 6 that has contacted the upper tread surface 22 of the stairs 20, and the operation portion 6 is moved to the back pipe 11 a by the coil spring 7. Since it is possible to return to the close position, that is, the initial position before the assistant 30 steps on the foot 32, one assistant 30 can more easily move the wheelchair 10 from the lower floor to the upper floor of the stairs 20. Can be moved.

なお、本実施形態において示した形状等はあくまで一例であり、実用新案登録請求の範囲に記載された本考案の要旨の範囲内において、種々の変形・変更が可能である。例えば、本実施形態では、車椅子移動補助装置１が取り付けられる車椅子１０として、自走式の車椅子を例示したが、これに限らず、例えば、介助式の車椅子、電動車椅子等に車椅子移動補助装置１を取り付けるものであってもよい。 Note that the shape and the like shown in the present embodiment are merely examples, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims of the utility model registration. For example, in the present embodiment, the self-propelled wheelchair is illustrated as the wheelchair 10 to which the wheelchair movement assisting device 1 is attached. However, the present invention is not limited thereto, and for example, the wheelchair movement assisting device 1 may be an assisting wheelchair or an electric wheelchair. May be attached.

また、本実施形態では、軸部２が１対のベースパイプ１１ｂに溶接により固定されるものを例示したが、これに限らず、例えば、軸部２が１対のベースパイプ１１ｂに着脱自在に固定されるものであってもよい。このようにすれば、他の車椅子１０への取り付けが非常に容易となる。 In the present embodiment, the shaft portion 2 is fixed to the pair of base pipes 11b by welding. However, the present invention is not limited to this. For example, the shaft portion 2 is detachable from the pair of base pipes 11b. It may be fixed. If it does in this way, attachment to the other wheelchair 10 will become very easy.

さらにまた、本実施形態では、横軸部２ｂの両端部を上方に折り曲げて縦軸部２ａとし、縦軸部２ａの上端部を１対のベースパイプ１１ｂの下部に溶接していたが、これに限らず、例えば、横軸部２ｂの両端部を１対のベースパイプ１１ｂの側部に溶接するものであってもよい。 Furthermore, in the present embodiment, both end portions of the horizontal axis portion 2b are bent upward to form the vertical axis portion 2a, and the upper end portion of the vertical axis portion 2a is welded to the lower portion of the pair of base pipes 11b. For example, both end portions of the horizontal shaft portion 2b may be welded to the side portions of the pair of base pipes 11b.

さらに、横軸部２ｂを別部材にし、縦軸部２ａに対して回転可能に取り付けるようにしても良い。この際、回転支持部３ａ１は、回転可能な横軸部２ｂに固定するようにすれば良い。このようにしても、操作部６を足３２で踏み込んだ際、上記説明した内容と同様の回転操作が行われる。 Furthermore, the horizontal shaft portion 2b may be a separate member, and may be rotatably attached to the vertical axis portion 2a. At this time, the rotation support portion 3a1 may be fixed to the rotatable horizontal shaft portion 2b. Even if it does in this way, when the operation part 6 is stepped on with the leg | foot 32, the rotation operation similar to the content demonstrated above is performed.

さらにまた、本実施形態では、１対の第２角部３ｆが、キャスタ３ｆ３を有するものを例示したが、これに限らず、例えば、摩擦力の小さい低摩擦シートを、１対の第２角部３ｆの外側面に貼着してもよい。 Furthermore, in the present embodiment, the pair of second corner portions 3f is exemplified as having the casters 3f3. However, the present invention is not limited to this. For example, a low friction sheet having a small frictional force is used as the pair of second corner portions 3f. You may affix on the outer surface of the part 3f.

さらにまた、本実施形態では、１対の第１ヒンジ部４及び１対の第２ヒンジ部５が、１対の小径筒部３ａ２，３ｂ１が当接して４５度を超える内側の回転を規制する１対の内側当接部４ｂ，５ｂを有するものを例示したが、これに限らず、例えば、シャックル等の環状部材を１対の大径筒部３ａ３，３ｂ２の一端開口部の内側に固定し、環状部材に１対の小径筒部３ａ２，３ｂ１が当接して４５度を超える内側の回転を規制してもよい。 Furthermore, in the present embodiment, the pair of first hinge portions 4 and the pair of second hinge portions 5 are in contact with the pair of small-diameter cylindrical portions 3a2 and 3b1 to restrict inner rotation exceeding 45 degrees. Although an example having a pair of inner abutting portions 4b and 5b has been illustrated, the present invention is not limited to this. The pair of small-diameter cylindrical portions 3a2 and 3b1 may come into contact with the annular member to restrict inner rotation exceeding 45 degrees.

さらにまた、本実施形態では、付勢部材として、コイルばね７を例示したが、これに限らず、例えば、合成ゴム等の弾性部材であってもよい。さらにまた、本実施形態では、コイルばね７が１対の第３腕部３ｃに連結されていたが、例えば、１対の第４腕部３ｄに連結されていてもよく、１対の回転支持部３ａ１内にコイルばね７を設け、操作部６が足３２で踏み込まれると、コイルばね７が圧縮し、操作部６から足３２を離間すると、そのコイルばね７の圧縮が解放されるようにしても良い。 In the present embodiment, the coil spring 7 is exemplified as the biasing member. However, the biasing member is not limited thereto, and may be an elastic member such as synthetic rubber. Furthermore, in the present embodiment, the coil spring 7 is connected to the pair of third arms 3c. However, for example, the coil spring 7 may be connected to the pair of fourth arms 3d. The coil spring 7 is provided in the portion 3a1, and the coil spring 7 is compressed when the operation portion 6 is stepped on with the foot 32, and the compression of the coil spring 7 is released when the foot 32 is separated from the operation portion 6. May be.

１車椅子移動補助装置
２軸部
２ａ縦軸部
２ｂ横軸部
２ｃ位置決め部材
３屈曲部
３ａ第１腕部
３ａ１回転支持部
３ａ２小径筒部
３ａ３大径筒部
３ｂ第２腕部
３ｂ１小径筒部
３ｂ２大径筒部
３ｃ第３腕部
３ｄ第４腕部
３ｅ第１角部
３ｆ第２角部
３ｆ１切り欠き
３ｆ２軸部
３ｆ３キャスタ
３ｇ第３角部
４第１ヒンジ部
４ａ軸部
４ｂ内側当接部
４ｃ外側当接部
５第２ヒンジ部
５ａ軸部
５ｂ内側当接部
５ｃ外側当接部
６操作部
７コイルばね（付勢部材）
１０車椅子
１１ａバックパイプ（後部フレーム）
１１ｂベースパイプ（下部フレーム）
１１ｃシートパイプ
１２駆動輪
１３手押しハンドル
２０階段
２１下段側踏面
２２上段側踏面
２２ａ上段側段鼻
３０介助者
３１手
３２足
４０使用者
Ｂａ第１係止部
Ｂｂ第２係止部

DESCRIPTION OF SYMBOLS 1 Wheelchair movement assistance apparatus 2 Shaft part 2a Vertical axis part 2b Horizontal shaft part 2c Positioning member 3 Bending part 3a 1st arm part 3a1 Rotation support part 3a2 Small diameter cylinder part 3a3 Large diameter cylinder part 3b 2nd arm part 3b1 Small diameter cylinder part 3b2 Large-diameter cylindrical portion 3c Third arm portion 3d Fourth arm portion 3e First corner portion 3f Second corner portion 3f1 Notch 3f2 Shaft portion 3f3 Casters 3g Third corner portion 4 First hinge portion 4a Shaft portion 4b Inner contact portion 4c outer contact portion 5 second hinge portion 5a shaft portion 5b inner contact portion 5c outer contact portion 6 operation portion 7 coil spring (biasing member)
10 Wheelchair 11a Back pipe (rear frame)
11b Base pipe (lower frame)
11c Seat pipe 12 Driving wheel 13 Hand push handle 20 Stair 21 Lower step tread 22 Upper step tread 22a Upper step nose 30 Helper 31 Hand 32 Foot 40 User Ba First locking portion Bb Second locking portion

Claims

A shaft attached to a pair of lower frames of the wheelchair;
A pair of first arm portions whose one end portions are rotatably coupled to the shaft portion, and one end portions are bent and connected to the inside of the other end portions of the pair of first arm portions. A pair of second arm portions, a pair of third arm portions whose one end portion is bent and connected to the inside of the other end portion of the pair of second arm portions, and one end portion of the pair of second arm portions. A pair of flexions in the form of side-viewed heels having a pair of fourth arms that are bent and connected to the outside of the other ends of the three arms and the other ends are provided behind the rear frame of the wheelchair. And
A pair of first hinge portions provided in an intermediate portion of the pair of first arm portions, which can be bent inward and cannot be bent outward;
By bending and connecting to the side of the other end of the pair of fourth arms so as to connect the other ends of the pair of fourth arms, the assistant is stepped on with his / her foot An operation portion that is rotatable from the rear of the rear frame toward the upper tread of the stairs, and
Between the other end portion of the pair of first arm portions and one end portion of the pair of second arm portions, the operation part is placed in a state where the assistant holds the handwheel handle of the wheelchair by hand. When the foot is depressed, the operation portion and the pair of bent portions are rotated, and a first corner portion is provided as a fulcrum when contacting the lower tread surface of the stairs,
The pair of first hinge portions are bent to a predetermined position on the inside when the wheelchair moves upward and rearward when the operation portion contacts the upper tread surface of the stairs, and the pair of first hinge portions Restricting the rotation of one end of the arm to the outside,
The operation unit that has contacted the upper tread surface of the staircase causes the wheel of the wheelchair to be driven when the assistant pushes the hand handle upward and rearward with the assistant stepping on the operation unit with his / her foot. A wheelchair movement assisting device serving as a fulcrum when moving on the upper tread of the stairs.

A pair of second hinge portions provided at an intermediate portion of the pair of second arm portions, which can be bent inward and cannot be bent outward;
The pair of second hinge portions are bent to an inner predetermined position when the wheelchair is moved upward and rearward when the pair of first hinge portions are bent to an inner predetermined position. Wheelchair movement assistance device of description.

One end is connected to the pair of third arms or the pair of fourth arms, the other end is connected to the rear frame, and the operation unit is biased toward the rear frame. The wheelchair movement auxiliary device according to claim 1 or 2, further comprising a member.