JP7473173B2 - lift device - Google Patents

Description

本発明は、手押し車を昇降させる昇降装置に関する。 The present invention relates to a lifting device for raising and lowering a handcart.

車椅子が段差を乗り越える際に利用される種々の昇降装置が提案されている。特許文献１には、車椅子のフレームに着脱自在に取り付けられる車椅子用スライドリフターが記載されている。特許文献１の車椅子用スライドリフターは、一対のロッドからなるリンク機構を有する。一対のロッドは、Ｘ形状に互いに交差し、交差部が中間シャフトにより回動自在に支持されている。一対のロッドの下端にはベースフレームが取り付けられる。一対のロッドの上端には上部スライドフレームおよび下部スライドフレームが互いに摺動可能に取り付けられる。上部スライドフレームは、車椅子のフレームに着脱自在に取り付けられる。 Various lifting devices have been proposed for use when a wheelchair overcomes a step. Patent Document 1 describes a wheelchair slide lifter that can be detachably attached to the frame of a wheelchair. The wheelchair slide lifter of Patent Document 1 has a link mechanism consisting of a pair of rods. The pair of rods cross each other in an X shape, and the intersection is supported by an intermediate shaft so that it can rotate freely. A base frame is attached to the lower ends of the pair of rods. An upper slide frame and a lower slide frame are attached to the upper ends of the pair of rods so that they can slide relative to each other. The upper slide frame is detachably attached to the frame of the wheelchair.

特開平８－１５０１７７号公報Japanese Patent Application Laid-Open No. 8-150177

特許文献１の車椅子用スライドリフターにおいては、車椅子の上昇時に、一対のロッドの上端の前後方向の間隔および一対のロッドの下端の前後方向の間隔が短くなる。この場合、下部スライドフレームを支持する支持点の間隔およびベースフレームにより支持される支持点の間隔が短くなる。それにより、車椅子のフレームを支持する支持領域の長さが短くなる。その結果、車椅子の上昇時に車椅子の安定性が低下する。 In the wheelchair slide lifter of Patent Document 1, when the wheelchair is raised, the distance between the upper ends of the pair of rods in the front-to-rear direction and the distance between the lower ends of the pair of rods in the front-to-rear direction become shorter. In this case, the distance between the support points that support the lower slide frame and the distance between the support points supported by the base frame become shorter. This shortens the length of the support area that supports the wheelchair frame. As a result, the stability of the wheelchair decreases when the wheelchair is raised.

本発明の目的は、手押し車を安定した状態で昇降させることが可能な昇降装置を提供することである。 The object of the present invention is to provide a lifting device that can lift and lower a pushcart in a stable manner.

（１）本発明に係る、昇降装置においては、手押し車を昇降させる昇降装置であって、第１の支持部材、第２の支持部材、第３の支持部材、第４の支持部材および駆動部材を含む昇降機構と、昇降機構の第２の支持部材を手押し車に取り付ける取付機構とを備え、第１の支持部材は、前後方向に延びるように設けられ、第２の支持部材は、前後方向に延び、第１の支持部材よりも上方に設けられ、第３の支持部材は、第１の支持部材に対して第１の軸の周りで回転可能で、かつ第２の支持部材に対して第１の軸よりも上方の第２の軸の周りで回転可能に設けられ、第４の支持部材は、第１の支持部材に対して第１の軸よりも後方の第３の軸の周りで回転可能で、かつ第２の支持部材に対して第２の軸よりも後方でかつ第３の軸よりも上方の第４の軸の周りで回転可能に設けられ、駆動部材は、第１の支持部材に対する第４の支持部材の角度を変化させることにより第２の支持部材を第１の支持部材に対して平行な状態で昇降させるために操作可能に構成される。 (1) The lifting device according to the present invention is a lifting device for lifting a pushcart, and is provided with a lifting mechanism including a first support member, a second support member, a third support member, a fourth support member and a drive member, and an attachment mechanism for attaching the second support member of the lifting mechanism to the pushcart, the first support member is provided to extend in the front-rear direction, the second support member extends in the front-rear direction and is provided above the first support member, the third support member is rotatable around a first axis relative to the first support member and the second support member is provided to extend in the front-rear direction. The fourth support member is rotatable about a second axis above the first axis relative to the first support member, the fourth support member is rotatable about a third axis rearward of the first axis relative to the first support member, and is rotatable about a fourth axis rearward of the second axis and above the third axis relative to the second support member, and the drive member is configured to be operable to raise and lower the second support member in a state parallel to the first support member by changing the angle of the fourth support member relative to the first support member.

その昇降装置においては、駆動部材が操作されると、第１の支持部材に対する第４の支持部材の角度が変化する。このとき、第１の支持部材に対する第３の支持部材の角度も変化する。それにより、第２の支持部材が第１の支持部材に対して平行な状態で昇降する。その結果、第２の支持部材に取り付けられた手押し車が昇降する。このような構成によれば、手押し車の昇降時に手押し車を支持する第２の支持部材による支持領域の長さが変化しない。したがって、手押し車を安定した状態で昇降させることが可能となる。 In this lifting device, when the drive member is operated, the angle of the fourth support member relative to the first support member changes. At this time, the angle of the third support member relative to the first support member also changes. This causes the second support member to rise and fall while parallel to the first support member. As a result, the pushcart attached to the second support member rises and falls. With this configuration, the length of the support area provided by the second support member that supports the pushcart does not change when the pushcart is raised and lowered. Therefore, it is possible to raise and lower the pushcart in a stable state.

（２）駆動部材は、第４の支持部材から後方に延びるように第４の支持部材に連結され、駆動部材の後端部に下方への荷重が加えられた場合に、梃子の原理で第１の支持部材に対する第４の支持部材の角度が大きくなることにより第２の支持部材が上昇してもよい。 (2) The driving member may be connected to the fourth support member so as to extend rearward from the fourth support member, and when a downward load is applied to the rear end of the driving member, the angle of the fourth support member relative to the first support member may increase based on the principle of leverage, causing the second support member to rise.

この場合、使用者は、梃子の原理により第４の支持部材の角度を変化させることができる。したがって、使用者は、小さな力で手押し車を上昇させることができる。 In this case, the user can change the angle of the fourth support member by using the principle of leverage. Therefore, the user can lift the pushcart with little force.

（３）昇降機構は、第３の支持部材に対してスライド可能に設けられたスライド部材をさらに含み、第２の軸はスライド部材に設けられ、第１の支持部材に対する第４の支持部材の角度が小さくなることにより第２の支持部材が第３の支持部材に近づいた場合に、スライド部材が第３の支持部材に対して前方にスライドすることにより第２の支持部材が第３の支持部材にさらに接近するように昇降機構が折り畳み可能であってもよい。 (3) The lifting mechanism may further include a slide member slidably provided relative to the third support member, the second axis being provided on the slide member, and the lifting mechanism may be foldable such that when the angle of the fourth support member relative to the first support member decreases such that the second support member approaches the third support member, the slide member slides forward relative to the third support member, thereby bringing the second support member even closer to the third support member.

この場合、使用者が昇降機構を折り畳んだ場合に、第３の支持部材に設けられたスライド部材が前方にスライドすることにより、第１の軸と第２の軸との間の距離が延長する。それにより、第２の支持部材を第３の支持部材にさらに接近させ、昇降機構を上下方向にさらにコンパクトにすることができる。したがって、手押し車を大型化することなく、昇降装置を手押し車に取り付けることができる。 In this case, when the user folds the lifting mechanism, the sliding member provided on the third support member slides forward, thereby extending the distance between the first shaft and the second shaft. This allows the second support member to be brought even closer to the third support member, making the lifting mechanism even more compact in the vertical direction. Therefore, the lifting device can be attached to the pushcart without increasing the size of the pushcart.

（４）昇降機構は、駆動部材の後端部に第５の軸の周りで回転可能に設けられた操作レバーをさらに含み、操作レバーは、第５の軸の後方に延びる状態で駆動部材に対する下方への回転角度が制限されるように設けられ、操作レバーが第５の軸の後方に延びる状態で操作レバーに下方への荷重が加えられた場合に、梃子の原理で第１の支持部材に対する第４の支持部材の角度が大きくなることにより第２の支持部材が上昇し、操作レバーが第５の軸の前方に折り畳まれた状態で昇降機構が手押し車に収納可能であってもよい。 (4) The lifting mechanism may further include an operating lever rotatably mounted on the rear end of the drive member around a fifth axis, the operating lever being arranged such that the downward rotation angle relative to the drive member is limited when the operating lever extends rearward of the fifth axis, and when a downward load is applied to the operating lever while the operating lever extends rearward of the fifth axis, the angle of the fourth support member relative to the first support member increases according to the principle of leverage, causing the second support member to rise, and the lifting mechanism may be storable in the pushcart when the operating lever is folded forward of the fifth axis.

この場合、使用者は、操作レバーを後方に倒した状態で下方への荷重を加えることにより小さな力で第２の支持部材を手押し車とともに上昇させることができる。また、操作レバーを前方に倒すことにより昇降機構をコンパクトにすることができる。それにより、手押し車を大型化することなく、昇降装置を手押し車に収納することができる。 In this case, the user can lift the second support member together with the cart with a small force by applying a downward load while tilting the operating lever backward. Also, the lifting mechanism can be made compact by tilting the operating lever forward. This allows the lifting device to be stored in the cart without increasing the size of the cart.

（５）取付機構は、昇降機構を手押し車に取り外し可能に取り付けるように構成されてもよい。 (5) The mounting mechanism may be configured to removably mount the lifting mechanism to the stroller.

上記の構成により、手押し車が折り畳み可能な構造を有する場合に、昇降装置を取り外すことにより、手押し車をコンパクトに折り畳むことができる。 With the above configuration, if the pushcart has a foldable structure, the pushcart can be folded compactly by removing the lifting device.

本発明によれば、手押し車を安定した状態で昇降させることが可能となる。 The present invention makes it possible to raise and lower the handcart in a stable manner.

一実施の形態に係る昇降装置の模式的側面図である。FIG. 1 is a schematic side view of a lifting device according to an embodiment. 図１の昇降装置の模式的平面図である。FIG. 2 is a schematic plan view of the lifting device of FIG. 1 . 車椅子および図１の昇降装置の模式的側面図である。FIG. 2 is a schematic side view of the wheelchair and the lifting device of FIG. 1; 図３の車椅子における取付機構の模式的平面図である。FIG. 4 is a schematic plan view of the attachment mechanism in the wheelchair of FIG. 3 . 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1. 図１の昇降装置の使用方法および動作を示す模式的側面図である。2 is a schematic side view showing a method of using and an operation of the lifting device of FIG. 1.

以下、本発明の実施の形態に係る昇降装置について図面を参照しながら詳細に説明する。 The lifting device according to the embodiment of the present invention will be described in detail below with reference to the drawings.

（１）昇降装置の構成
図１は、一実施の形態に係る昇降装置の模式的側面図である。図２は、図１の昇降装置の模式的平面図である。以下、昇降装置が前進および後退する方向を前後方向と呼ぶ。図１および図２に示すように、昇降装置１は、昇降機構ＬＦおよび取付機構ＡＴを備える。昇降機構ＬＦは、一対の第１の支持部材１０、一対の第２の支持部材２０、一対の第３の支持部材３０、単一の第４の支持部材４０および第１～第４の軸Ａ１～Ａ４を含む。本実施の形態では、各第１の支持部材１０、各第２の支持部材２０、各第３の支持部材３０および第４の支持部材４０は、棒状部材である。 (1) Configuration of the lifting device FIG. 1 is a schematic side view of a lifting device according to one embodiment. FIG. 2 is a schematic plan view of the lifting device of FIG. 1. Hereinafter, the direction in which the lifting device advances and retreats is referred to as the front-rear direction. As shown in FIG. 1 and FIG. 2, the lifting device 1 includes a lifting mechanism LF and an attachment mechanism AT. The lifting mechanism LF includes a pair of first support members 10, a pair of second support members 20, a pair of third support members 30, a single fourth support member 40, and first to fourth axes A1 to A4. In this embodiment, each of the first support members 10, each of the second support members 20, each of the third support members 30, and the fourth support member 40 are rod-shaped members.

一対の第１の支持部材１０は、互いに平行かつ前後方向に延びる。一対の第２の支持部材２０は、互いに平行かつ前後方向に延びる。図１に示すように、各第２の支持部材２０は、各第１の支持部材１０よりも上方に配置される。各第３の支持部材３０の一端部（以下、上端部と呼ぶ。）近傍には、スライド部材３１が設けられる。スライド部材３１は、ガイド部材３２により長手方向に沿ってスライド可能に第３の支持部材３０に取り付けられる。図２に示すように、各第３の支持部材３０の他端部（以下、下端部と呼ぶ。）の両側面には、各一対の取付部材３３，３４が設けられる。各一対の取付部材３３，３４は、ボルトにより各第３の支持部材３０に固定されている。 The pair of first support members 10 extend parallel to each other in the front-rear direction. The pair of second support members 20 extend parallel to each other in the front-rear direction. As shown in FIG. 1, each second support member 20 is disposed above each first support member 10. A slide member 31 is provided near one end (hereinafter referred to as the upper end) of each third support member 30. The slide member 31 is attached to the third support member 30 by a guide member 32 so as to be slidable along the longitudinal direction. As shown in FIG. 2, each pair of mounting members 33, 34 is provided on both side surfaces of the other end (hereinafter referred to as the lower end) of each third support member 30. Each pair of mounting members 33, 34 is fixed to each third support member 30 by a bolt.

図１に示すように、第２の軸Ａ２は、第１の軸Ａ１よりも上方に配置される。第３の軸Ａ３は、前後方向において第１の軸Ａ１よりも後方に配置される。第４の軸Ａ４は、前後方向において第２の軸Ａ２よりも後方に配置され、かつ第３の軸Ａ３よりも上方に配置される。図２に示すように、第１～第４の軸Ａ１～Ａ４は、前後方向に垂直な左右方向において互いに平行に延びる。 As shown in FIG. 1, the second axis A2 is positioned above the first axis A1. The third axis A3 is positioned behind the first axis A1 in the front-rear direction. The fourth axis A4 is positioned behind the second axis A2 in the front-rear direction and above the third axis A3. As shown in FIG. 2, the first to fourth axes A1 to A4 extend parallel to each other in the left-right direction perpendicular to the front-rear direction.

図１に示すように、各第３の支持部材３０の下端部は、各第１の支持部材１０の前端部に対して第１の軸Ａ１の周りで回転可能に設けられる。各スライド部材３１の上端部は、各第２の支持部材２０の前端部に対して第２の軸Ａ２の周りで回転可能に設けられる。第４の支持部材４０の一端部（以下、下端部と呼ぶ。）は、第１の支持部材１０の後端部に対して第３の軸Ａ３の周りで回転可能に設けられる。第４の支持部材４０の他端部（以下、上端部と呼ぶ。）は、各第２の支持部材２０の後端部に対して第４の軸Ａ４の周りで回転可能に設けられる。 As shown in FIG. 1, the lower end of each third support member 30 is rotatably provided around the first axis A1 relative to the front end of each first support member 10. The upper end of each slide member 31 is rotatably provided around the second axis A2 relative to the front end of each second support member 20. One end of the fourth support member 40 (hereinafter referred to as the lower end) is rotatably provided around the third axis A3 relative to the rear end of the first support member 10. The other end of the fourth support member 40 (hereinafter referred to as the upper end) is rotatably provided around the fourth axis A4 relative to the rear end of each second support member 20.

それにより、図１の側面視で、第１～第４の軸Ａ１～Ａ４が平行四辺形の頂点となるように第１～第４の支持部材１０～４０およびスライド部材３１が構成される。この場合、一対の第１の支持部材１０および一対の第２の支持部材２０は水平状態を保つ。 As a result, the first to fourth support members 10 to 40 and the slide member 31 are configured so that the first to fourth axes A1 to A4 are the vertices of a parallelogram when viewed from the side in FIG. 1. In this case, the pair of first support members 10 and the pair of second support members 20 are kept in a horizontal state.

図２に示すように、一対の第２の支持部材２０の間隔は、一対の第１の支持部材１０の間隔および一対の第３の支持部材３０の間隔よりも小さい。それにより、一対の第２の支持部材２０は、平面視で、一対の第１の支持部材１０の間および一対の第３の支持部材３０の間に位置する。また、第４の支持部材４０は、平面視で一対の第１の支持部材１０の間に位置する。 As shown in FIG. 2, the distance between the pair of second support members 20 is smaller than the distance between the pair of first support members 10 and the distance between the pair of third support members 30. As a result, the pair of second support members 20 are located between the pair of first support members 10 and between the pair of third support members 30 in a plan view. In addition, the fourth support member 40 is located between the pair of first support members 10 in a plan view.

各第１の支持部材１０の前端部は、第１の軸Ａ１に対して回転可能に取り付けられる。各第３の支持部材３０の下端部に固定された各一対の取付部材３３，３４は、第１の支持部材１０の両側面を挟むように第１の軸Ａ１に対して回転可能に取り付けられる。各第１の支持部材１０の後端部は、第３の軸Ａ３に対して回転可能に取り付けられる。第４の支持部材４０の下端部は、第３の軸Ａ３に対して回転可能に取り付けられる。 The front end of each first support member 10 is rotatably attached to the first axis A1. Each pair of mounting members 33, 34 fixed to the lower end of each third support member 30 is rotatably attached to the first axis A1 so as to sandwich both sides of the first support member 10. The rear end of each first support member 10 is rotatably attached to the third axis A3. The lower end of the fourth support member 40 is rotatably attached to the third axis A3.

各第２の支持部材２０の前端部は、第２の軸Ａ２に対して回転可能に取り付けられる。スライド部材３１の上端部は、第２の軸Ａ２に対して回転可能に取り付けられる。各第２の支持部材２０の後端部は、第４の軸Ａ４に対して回転可能に取り付けられる。第４の支持部材４０の上端部は、第４の軸Ａ４に対して回転可能に取り付けられる。また、第１の軸Ａ１の両端には、それぞれ車輪Ｗ１が回転可能に設けられ、第３の軸Ａ３の両端には、それぞれ車輪Ｗ２が回転可能に設けられる。 The front end of each second support member 20 is rotatably attached to the second axis A2. The upper end of the slide member 31 is rotatably attached to the second axis A2. The rear end of each second support member 20 is rotatably attached to the fourth axis A4. The upper end of the fourth support member 40 is rotatably attached to the fourth axis A4. In addition, wheels W1 are rotatably provided on both ends of the first axis A1, and wheels W2 are rotatably provided on both ends of the third axis A3.

このような構成により、図１の側面視で、第３の軸Ａ３の周りで第４の支持部材４０の回転に連動して、第１～第４の軸Ａ１～Ａ４を頂点とする平行四辺形が変形する。それにより、一対の第１の支持部材１０と一対の第２の支持部材２０とが水平状態を保持しつつ一対の第２の支持部材２０が一対の第１の支持部材１０に対して上下動することができる。また、一対の車輪Ｗ１およびＷ２が接地することにより、昇降装置１を前進および後退させることが可能になる。 With this configuration, in a side view of FIG. 1, a parallelogram with the first to fourth axes A1 to A4 as vertices is deformed in conjunction with the rotation of the fourth support member 40 around the third axis A3. This allows the pair of second support members 20 to move up and down relative to the pair of first support members 10 while maintaining a horizontal state between the pair of first support members 10 and the pair of second support members 20. In addition, the pair of wheels W1 and W2 come into contact with the ground, making it possible to move the lifting device 1 forward and backward.

昇降機構ＬＦは、駆動部材５０、補助支持部材６０、操作レバー７０、および第５～第７の軸Ａ５～Ａ７をさらに含む。駆動部材５０、補助支持部材６０および操作レバー７０は、棒状部材である。 The lifting mechanism LF further includes a drive member 50, an auxiliary support member 60, an operating lever 70, and fifth to seventh shafts A5 to A7. The drive member 50, the auxiliary support member 60, and the operating lever 70 are rod-shaped members.

図１に示すように、駆動部材５０の一端部は、第４の支持部材４０の下端部に固定される。補助支持部材６０の一端部は、第４の支持部材４０の上端部近傍に固定される。駆動部材５０の他端部と補助支持部材６０の他端部とは、互いに連結される。第４の支持部材４０と駆動部材５０とがなす角度は、鋭角である。それにより、第４の支持部材４０、駆動部材５０および補助支持部材６０により三角形が形成される。第４の支持部材４０に対する駆動部材５０の角度が変化しないように、駆動部材５０が第４の支持部材４０に固定される。 As shown in FIG. 1, one end of the driving member 50 is fixed to the lower end of the fourth support member 40. One end of the auxiliary support member 60 is fixed near the upper end of the fourth support member 40. The other end of the driving member 50 and the other end of the auxiliary support member 60 are connected to each other. The angle between the fourth support member 40 and the driving member 50 is an acute angle. As a result, the fourth support member 40, the driving member 50, and the auxiliary support member 60 form a triangle. The driving member 50 is fixed to the fourth support member 40 so that the angle of the driving member 50 relative to the fourth support member 40 does not change.

操作レバー７０の一端部は、駆動部材５０の他端部に第５の軸Ａ５の周りで回転可能に取り付けられる。操作レバー７０は、補助支持部材６０に対して第５の軸Ａ５を中心として前方および後方に一定の角度範囲Δθだけ回転可能である。後方への操作レバー７０の回転角度は、操作レバー７０の下面が駆動部材５０の他端部のエッジに当接することにより制限される。前方への操作レバー７０の回転角度は、操作レバー７０が第４の支持部材４０と略平行になる角度に制限される。本実施の形態では、駆動部材５０および操作レバー７０の後方または下方における操作レバー７０から駆動部材５０への角度は、１８０°よりも小さい鈍角θ１に制限される。 One end of the operating lever 70 is attached to the other end of the drive member 50 so as to be rotatable around the fifth axis A5. The operating lever 70 can rotate forward and backward around the fifth axis A5 relative to the auxiliary support member 60 within a certain angle range Δθ. The rotation angle of the operating lever 70 backward is limited by the lower surface of the operating lever 70 abutting against the edge of the other end of the drive member 50. The rotation angle of the operating lever 70 forward is limited to an angle at which the operating lever 70 is approximately parallel to the fourth support member 40. In this embodiment, the angle from the operating lever 70 to the drive member 50 behind or below the drive member 50 and the operating lever 70 is limited to an obtuse angle θ1 that is smaller than 180°.

第６の軸Ａ６は、駆動部材５０の他端部と補助支持部材６０の他端部との連結部に取り付けられる。第６の軸Ａ６の両端には、それぞれ車輪Ｗ３が回転可能に取り付けられる。第７の軸Ａ７は、操作レバー７０の他端部に取り付けられる。操作レバー７０の両端には、それぞれ車輪Ｗ４が回転可能に取り付けられる。 The sixth shaft A6 is attached to the connection between the other end of the drive member 50 and the other end of the auxiliary support member 60. Wheels W3 are rotatably attached to both ends of the sixth shaft A6. The seventh shaft A7 is attached to the other end of the operating lever 70. Wheels W4 are rotatably attached to both ends of the operating lever 70.

取付機構ＡＴは、一対の取付部材８０および複数の保持部材８４，８５を備える。各取付部材８０は棒状部材である。一対の取付部材８０は、一対の第２の支持部材２０上に前後方向に延びるように配置される。各取付部材８０は、接続部材８１，８２により各第２の支持部材２０に固定される。保持部材８４は、左右方向に突出するように一対の取付部材８０の前端部に設けられる。保持部材８５は、左右方向に突出するように一対の取付部材８０の後端部に設けられる。 The mounting mechanism AT includes a pair of mounting members 80 and multiple retaining members 84, 85. Each mounting member 80 is a rod-shaped member. The pair of mounting members 80 are arranged on the pair of second support members 20 so as to extend in the front-rear direction. Each mounting member 80 is fixed to each second support member 20 by connecting members 81, 82. The retaining member 84 is provided at the front end of the pair of mounting members 80 so as to protrude in the left-right direction. The retaining member 85 is provided at the rear end of the pair of mounting members 80 so as to protrude in the left-right direction.

使用者が昇降装置１の取付部材８０を押し下げると、第１の支持部材１０に対する第３の支持部材３０および第４の支持部材４０の角度が小さくなり、第２の支持部材２０が下降する。一方、使用者が操作レバー７０を後方に倒すと、第１の支持部材１０に対する第３の支持部材３０および第４の支持部材４０の角度が大きくなり、第２の支持部材２０が上昇する。この場合、第４の支持部材４０と駆動部材５０とがなす角度および駆動部材５０と操作レバー７０とがなす角度が固定されているので、各車輪Ｗ２の接地点が支点となり、第４の軸Ａ４が作用点となり、操作レバー７０が力点となる梃子の原理により第４の支持部材４０の角度が変化する。 When the user presses down on the mounting member 80 of the lifting device 1, the angle of the third support member 30 and the fourth support member 40 relative to the first support member 10 decreases, and the second support member 20 descends. On the other hand, when the user tilts the operating lever 70 backward, the angle of the third support member 30 and the fourth support member 40 relative to the first support member 10 increases, and the second support member 20 ascends. In this case, since the angle between the fourth support member 40 and the driving member 50 and the angle between the driving member 50 and the operating lever 70 are fixed, the angle of the fourth support member 40 changes according to the principle of leverage, with the ground contact point of each wheel W2 as the fulcrum, the fourth axis A4 as the point of action, and the operating lever 70 as the point of force.

（２）昇降装置１の使用方法および動作
以下、手押し車の一例として車椅子を説明する。図３は、車椅子および図１の昇降装置１の模式的側面図である。図４は、図３の車椅子における取付機構ＡＴの模式的平面図である。図５～図１２は、図１の昇降装置１の使用方法および動作を示す模式的側面図である。図３および図５～図１２においては、昇降装置１が取り付けられる車椅子における保持機構を実線で示し、車椅子の他の部分を点線で示す。 (2) Method of Use and Operation of the Lifting Device 1 A wheelchair will be described below as an example of a pushcart. Fig. 3 is a schematic side view of the wheelchair and the lifting device 1 of Fig. 1. Fig. 4 is a schematic plan view of the attachment mechanism AT of the wheelchair of Fig. 3. Figs. 5 to 12 are schematic side views showing the method of use and operation of the lifting device 1 of Fig. 1. In Fig. 3 and Figs. 5 to 12, the holding mechanism of the wheelchair to which the lifting device 1 is attached is shown by solid lines, and other parts of the wheelchair are shown by dotted lines.

図３に示すように、車椅子１００は、車体１０１、一対の前輪１０２、一対の後輪１０３、一対のハンドル部１０４および保持機構２００を備える。車体１０１の前端に一対の前輪１０２が設けられ、車体１０１の後端に一対の後輪１０３が設けられる。車体１０１の後端上部に一対のハンドル部１０４が設けられる。 As shown in FIG. 3, the wheelchair 100 comprises a body 101, a pair of front wheels 102, a pair of rear wheels 103, a pair of handles 104, and a holding mechanism 200. The pair of front wheels 102 are provided at the front end of the body 101, and the pair of rear wheels 103 are provided at the rear end of the body 101. A pair of handles 104 are provided at the upper rear end of the body 101.

図４に示すように、保持機構２００は、一対のガイドレール１０５、一対の取付保持部１０６、一対の保持部材１０７および一対の保持部材１０８を含む。一対のガイドレール１０５は、車体１０１の下部に前後方向に延びるように設けられる。一対の取付保持部１０６は、一対のガイドレール１０５に対して前後方向にスライド可能に設けられる。一対の取付保持部１０６の互いに対向する側面には、一対の保持部材１０７および一対の保持部材１０８が取り付けられる。各保持部材１０７は、各取付保持部１０６の前端部に設けられ、各保持部材１０８は、各取付保持部１０６の後端部に設けられる。一対の保持部材１０７は、取付機構ＡＴの左右方向に突出する保持部材８４を保持可能に構成される。一対の保持部材１０８は、取付機構ＡＴの左右方向に突出する保持部材８５を保持可能に構成される。 As shown in FIG. 4, the holding mechanism 200 includes a pair of guide rails 105, a pair of mounting holding parts 106, a pair of holding members 107, and a pair of holding members 108. The pair of guide rails 105 are provided on the lower part of the vehicle body 101 so as to extend in the front-rear direction. The pair of mounting holding parts 106 are provided so as to be slidable in the front-rear direction relative to the pair of guide rails 105. The pair of holding members 107 and the pair of holding members 108 are attached to the opposing side surfaces of the pair of mounting holding parts 106. Each holding member 107 is provided at the front end of each mounting holding part 106, and each holding member 108 is provided at the rear end of each mounting holding part 106. The pair of holding members 107 are configured to be able to hold the holding members 84 protruding in the left-right direction of the mounting mechanism AT. The pair of holding members 108 are configured to be able to hold the holding members 85 protruding in the left-right direction of the mounting mechanism AT.

以下、車椅子１００を押す人を介助者と呼ぶ。また、車椅子１００に乗る人および介助者を使用者と総称する。図１の状態から介助者が取付部材８０を押し下げると、第３の支持部材３０および第４の支持部材４０が前方に倒れ、取付部材８０および第２の支持部材２０が下降する。それにより、昇降機構ＬＦが折り畳まれる。この状態で、介助者は、車椅子１００の後方から昇降装置１を前進させることにより、図３に示すように、昇降装置１を車椅子１００の下方に進入させる。 Hereinafter, the person pushing the wheelchair 100 will be referred to as the caregiver. Furthermore, the person riding in the wheelchair 100 and the caregiver will be collectively referred to as the user. When the caregiver pushes down on the mounting member 80 from the state shown in FIG. 1, the third support member 30 and the fourth support member 40 will fall forward, and the mounting member 80 and the second support member 20 will descend. This will fold the lifting mechanism LF. In this state, the caregiver will move the lifting device 1 forward from the rear of the wheelchair 100, causing the lifting device 1 to enter below the wheelchair 100, as shown in FIG. 3.

次に、介助者が操作レバー７０を後方に倒すと、取付部材８０が上昇する。それにより、図４に示すように、保持部材８４の両端が一対の保持部材１０７により保持され、保持部材８５の両端が一対の保持部材１０８により保持される。その結果、昇降装置１が車椅子１００に取り付けられる。この状態で、図５に示すように、介助者が操作レバー７０を前方に倒すことにより操作レバー７０をほぼ水平状態にする。それにより、スライド部材３１が第３の支持部材３０に対して前方にスライドし、第２の支持部材２０が第３の支持部材３０に対してさらに接近する。その結果、昇降機構ＬＦが上下方向にさらにコンパクトに折り畳まれる。このとき、各車輪Ｗ１および各車輪Ｗ２は、床面から浮上している。 Next, when the caregiver tilts the operating lever 70 backward, the mounting member 80 rises. As a result, as shown in FIG. 4, both ends of the holding member 84 are held by a pair of holding members 107, and both ends of the holding member 85 are held by a pair of holding members 108. As a result, the lifting device 1 is attached to the wheelchair 100. In this state, as shown in FIG. 5, the caregiver tilts the operating lever 70 forward to bring the operating lever 70 into a substantially horizontal state. As a result, the sliding member 31 slides forward relative to the third support member 30, and the second support member 20 approaches even closer to the third support member 30. As a result, the lifting mechanism LF is folded up more compactly in the vertical direction. At this time, each wheel W1 and each wheel W2 is raised above the floor surface.

介助者は、図５の状態から昇降装置１を前方に押し込む。それにより、一対の取付保持部１０６が昇降装置１とともにガイドレール１０５に対して前方にスライドする。その結果、図６に示すように、昇降装置１が車椅子１００の車体１０１の下方に収納される。車椅子１００の使用者は、昇降装置１が収納された状態で車椅子１００を移動させることができる。 The caregiver pushes the lifting device 1 forward from the state shown in FIG. 5. This causes the pair of mounting holders 106 to slide forward along with the lifting device 1 relative to the guide rails 105. As a result, the lifting device 1 is stored below the body 101 of the wheelchair 100, as shown in FIG. 6. The user of the wheelchair 100 can move the wheelchair 100 with the lifting device 1 stored.

図７に示すように、車椅子１００の前方に段差Ｌがある場合、介助者は、車椅子１００を段差Ｌの手前で停止させる。次いで、介助者は、車体１０１の下方から後方へ昇降装置１を引き出し、操作レバー７０を引き上げる。この状態で、介助者は、図８に示すように、昇降装置１を車体１０１の下方に押し込む。この場合、取付保持部１０６がガイドレール１０５の前端までスライドする。 As shown in FIG. 7, when there is a step L in front of the wheelchair 100, the caregiver stops the wheelchair 100 just before the step L. Next, the caregiver pulls the lifting device 1 rearward from below the vehicle body 101 and pulls up the operating lever 70. In this state, the caregiver pushes the lifting device 1 below the vehicle body 101, as shown in FIG. 8. In this case, the mounting holder 106 slides to the front end of the guide rail 105.

次に、図９に示すように、介助者は、操作レバー７０を後方へ倒す。それにより、第１の支持部材１０に対する第４の支持部材４０の角度および第２の支持部材２０に対する第３の支持部材３０の角度が大きくなり、各車輪Ｗ１および各車輪Ｗ２が床面に接地する。これにより、第１の支持部材１０と床面とが平行になる。この状態で、介助者は、操作レバー７０を例えば足でさらに押し下げる。それにより、第１の支持部材１０に対する第４の支持部材４０の角度および第２の支持部材２０に対する第３の支持部材３０の角度がさらに大きくなり、第２の支持部材２０が水平状態を保ちつつ取付部材８０とともに上昇する。その結果、車椅子１００が上昇する。この場合、各車輪Ｗ２の接地点を支点とする梃子の原理により、第４の支持部材４０の角度が大きくなる。したがって、介助者は小さい踏力で１００を上昇させることができる。 Next, as shown in FIG. 9, the caregiver tilts the operating lever 70 backward. As a result, the angle of the fourth support member 40 relative to the first support member 10 and the angle of the third support member 30 relative to the second support member 20 increase, and each wheel W1 and each wheel W2 touches the floor surface. As a result, the first support member 10 and the floor surface become parallel. In this state, the caregiver further presses down the operating lever 70, for example, with his foot. As a result, the angle of the fourth support member 40 relative to the first support member 10 and the angle of the third support member 30 relative to the second support member 20 increase further, and the second support member 20 rises together with the mounting member 80 while maintaining a horizontal state. As a result, the wheelchair 100 rises. In this case, the angle of the fourth support member 40 increases due to the principle of a lever with the ground contact point of each wheel W2 as a fulcrum. Therefore, the caregiver can raise the wheelchair 100 with a small pedaling force.

次に、図１０に示すように、介助者は、例えば足で操作レバー７０をさらに押し下げるとともに各車輪Ｗ４を床面に接地させる。それにより、第１の支持部材１０に対する第３の支持部材３０および第４の支持部材４０の角度は、略垂直になる。 Next, as shown in FIG. 10, the caregiver further presses down the operating lever 70 with, for example, his/her foot and grounds each wheel W4 on the floor surface. As a result, the angle of the third support member 30 and the fourth support member 40 relative to the first support member 10 becomes approximately perpendicular.

本実施の形態では、図１１に示すように、介助者は、操作レバー７０の前端部近傍を例えば足でさらに押し下げることにより各車輪Ｗ３を床面に接地させる。このとき、第１の支持部材１０に対して第３の支持部材３０および第４の支持部材４０は、僅かに後方に傾斜する。本実施の形態では、各車輪Ｗ１～Ｗ４が床面に接地することにより、安定した状態で車椅子１００を前進させることができる。 In this embodiment, as shown in FIG. 11, the caregiver presses down further near the front end of the operating lever 70 with, for example, the foot, thereby causing each wheel W3 to contact the floor surface. At this time, the third support member 30 and the fourth support member 40 are tilted slightly backward relative to the first support member 10. In this embodiment, with each wheel W1 to W4 contacting the floor surface, the wheelchair 100 can be moved forward in a stable state.

介助者は、図１２に示すように、各車輪Ｗ１が段差Ｌ１の近傍に位置するように昇降装置１および車椅子１００を前進させた後、車椅子１００の車体１０１を昇降装置１から前方に移動させる。この場合、取付保持部１０６がガイドレール１０５に沿ってスライドする。それにより、車椅子１００が段差Ｌの上面の上方に移動する。 As shown in FIG. 12, the caregiver moves the lifting device 1 and wheelchair 100 forward so that each wheel W1 is positioned near the step L1, and then moves the body 101 of the wheelchair 100 forward from the lifting device 1. In this case, the mounting holder 106 slides along the guide rail 105. This causes the wheelchair 100 to move above the top surface of the step L.

次に、介助者は、図６～図１２の動作と逆の動作で、取付機構ＡＴを折り畳んだ後、図１３に示すように、昇降装置１を車椅子１００の下方に収納する。車椅子１００の使用者は、昇降装置１が収納された状態で段差Ｌの上面上で車椅子１００を移動させることができる。 Next, the caregiver folds the attachment mechanism AT in the reverse order to that shown in Figures 6 to 12, and then stores the lifting device 1 below the wheelchair 100 as shown in Figure 13. With the lifting device 1 stored, the user of the wheelchair 100 can move the wheelchair 100 on the top surface of the step L.

（３）実施の形態の効果
本実施の形態に係る昇降装置１によれば、操作レバー７０を用いて駆動部材５０が操作されると、昇降機構ＬＦの第１の支持部材１０に対する第３の支持部材３０および第４の支持部材４０の角度が変化する。それにより、第２の支持部材２０が第１の支持部材１０に対して平行な状態で昇降する。この場合、車椅子１００の昇降時に第２の支持部材２０による車椅子１００の支持領域の長さが変化しない。その結果、使用者は、車椅子１００を安定した状態で昇降させることができる。 (3) Effects of the embodiment According to the lifting device 1 of the present embodiment, when the drive member 50 is operated using the operating lever 70, the angles of the third support member 30 and the fourth support member 40 relative to the first support member 10 of the lifting mechanism LF change. As a result, the second support member 20 rises and falls in a state parallel to the first support member 10. In this case, the length of the support area of the wheelchair 100 by the second support member 20 does not change when the wheelchair 100 rises and falls. As a result, the user can raise and lower the wheelchair 100 in a stable state.

また、駆動部材５０の後端部に下方への荷重が加わることにより、第１の支持部材１０に対する第４の支持部材４０の角度が梃子の原理で変化する。それにより、使用者は、小さな力で車椅子１００を上昇させることができる。本実施の形態では、使用者は、操作レバー７０を第５の軸Ａ５の後方に倒した状態で押し下げることにより、車椅子１００をより小さい力で上昇させることができる。 In addition, when a downward load is applied to the rear end of the drive member 50, the angle of the fourth support member 40 relative to the first support member 10 changes using the principle of a lever. This allows the user to raise the wheelchair 100 with less force. In this embodiment, the user can raise the wheelchair 100 with less force by pushing down the operating lever 70 while tilting it backward on the fifth axis A5.

また、第２の支持部材２０が第３の支持部材３０に接近するように昇降機構ＬＦが折り畳まれると、スライド部材３１が第３の支持部材３０に対して前方にスライドする。この場合、第１の軸Ａ１と第２の軸Ａ２との間の距離が延長する。それにより、昇降機構ＬＦが上下方向にさらにコンパクトになる。 When the lifting mechanism LF is folded so that the second support member 20 approaches the third support member 30, the slide member 31 slides forward relative to the third support member 30. In this case, the distance between the first axis A1 and the second axis A2 is extended. This makes the lifting mechanism LF even more compact in the vertical direction.

さらに、操作レバー７０が第５の軸Ａ５の前方に折り畳まれることにより、昇降機構ＬＦの全体をさらにコンパクトに折り畳むことができる。その結果、車椅子１００を大型化することなく、昇降装置１を車椅子１００に収納することができる。それにより、使用者は、昇降装置１が収納された状態で車椅子１００を移動させることができる。 Furthermore, by folding the operating lever 70 forward of the fifth axis A5, the entire lifting mechanism LF can be folded even more compactly. As a result, the lifting device 1 can be stored in the wheelchair 100 without increasing the size of the wheelchair 100. This allows the user to move the wheelchair 100 with the lifting device 1 stored.

また、取付機構ＡＴにより昇降機構ＬＦが前後方向にスライド可能に車椅子１００に取り付けられるので、使用者は、昇降装置１を車椅子１００に容易に取り付けおよび収納することができるとともに、車椅子１００から昇降装置１を容易に取り外すことができる。それにより、車椅子１００が折り畳み可能な構造を有する場合、使用者は、車椅子１００をコンパクトに折り畳むことができる。 In addition, because the lifting mechanism LF is attached to the wheelchair 100 by the attachment mechanism AT so as to be slidable in the forward and backward directions, the user can easily attach and store the lifting device 1 to the wheelchair 100, and can also easily remove the lifting device 1 from the wheelchair 100. As a result, if the wheelchair 100 has a foldable structure, the user can fold the wheelchair 100 compactly.

（４）他の実施の形態
（ａ）上記実施の形態では、駆動部材５０に操作レバー７０が設けられるが、操作レバー７０が設けられなくてもよい。この場合、使用者は、駆動部材５０を操作することにより第４の支持部材４０の角度を変化させることができる。 (4) Other Embodiments (a) In the above embodiment, the operating lever 70 is provided on the driving member 50, but the operating lever 70 does not have to be provided. In this case, the user can change the angle of the fourth support member 40 by operating the driving member 50.

（ｂ）上記実施の形態では、第１の軸Ａ１の両端にそれぞれ車輪Ｗ１が設けられ、第２の軸Ａ２の両端にそれぞれ車輪Ｗ２が取付られているが、各車輪Ｗ１，Ｗ２が設けられなくてもよい。例えば、各車輪Ｗ１，Ｗ２の代わりに第１の支持部材１０の下面に床面を滑動可能な突起が設けられてもよい。 (b) In the above embodiment, wheels W1 are provided on both ends of the first shaft A1, and wheels W2 are attached to both ends of the second shaft A2, but the wheels W1 and W2 do not have to be provided. For example, instead of the wheels W1 and W2, a protrusion capable of sliding on the floor surface may be provided on the underside of the first support member 10.

（ｃ）上記実施の形態では、第６の軸Ａ６の両端にそれぞれ車輪Ｗ３が設けられ、第７の軸Ａ７の両端にそれぞれ車輪Ｗ４が取付られているが、各車輪Ｗ３，Ｗ４が設けられなくてもよい。例えば、各車輪Ｗ３，Ｗ４の代わりに第１の支持部材１０の下面に床面を滑動可能な突起が設けられてもよい。 (c) In the above embodiment, wheels W3 are provided on both ends of the sixth axis A6, and wheels W4 are attached to both ends of the seventh axis A7, but the wheels W3 and W4 do not have to be provided. For example, instead of the wheels W3 and W4, a protrusion capable of sliding on the floor surface may be provided on the underside of the first support member 10.

（ｄ）上記実施の形態では、一対の第１の支持部材１０、一対の第２の支持部材２０、一対の第３の支持部材３０および単一の第４の支持部材４０が設けられるが、本発明はこれに限定されない。例えば、単一の第１の支持部材１０、単一の第２の支持部材２０および単一の第３の支持部材３０が用いられてもよい。また、一対の第４の支持部材４０が用いられてもよい。さらに、第１の支持部材１０、第２の支持部材２０、第３の支持部材３０および第４の支持部材４０の形状は棒状部材に限定されない。例えば、第１の支持部材１０、第２の支持部材２０、第３の支持部材３０および第４の支持部材４０の形状が板状部材であってもよい。 (d) In the above embodiment, a pair of first support members 10, a pair of second support members 20, a pair of third support members 30, and a single fourth support member 40 are provided, but the present invention is not limited to this. For example, a single first support member 10, a single second support member 20, and a single third support member 30 may be used. Also, a pair of fourth support members 40 may be used. Furthermore, the shapes of the first support member 10, the second support member 20, the third support member 30, and the fourth support member 40 are not limited to rod-shaped members. For example, the shapes of the first support member 10, the second support member 20, the third support member 30, and the fourth support member 40 may be plate-shaped members.

（ｅ）上記実施の形態では、駆動部材５０の一端部が第４の支持部材４０の下端部に固定されるが、本発明はこれに限定されない。例えば、駆動部材５０の一端部が第４の支持部材４０の中央部付近に固定されてもよい。 (e) In the above embodiment, one end of the driving member 50 is fixed to the lower end of the fourth support member 40, but the present invention is not limited to this. For example, one end of the driving member 50 may be fixed near the center of the fourth support member 40.

（ｆ）上記実施の形態では、第３の支持部材３０にガイド部材３２がスライド可能に設けられているが、本発明はこれに限定されない。第３の支持部材３０にガイド部材３２が設けられなくてもよい。この場合、第２の軸Ａ２は、第３の支持部材３０の上端部に設けられてもよい。 (f) In the above embodiment, the guide member 32 is slidably provided on the third support member 30, but the present invention is not limited to this. The guide member 32 does not have to be provided on the third support member 30. In this case, the second axis A2 may be provided on the upper end of the third support member 30.

（ｇ）上記実施の形態では、補助支持部材６０が第４の支持部材４０に固定され、かつ駆動部材５０に連結されるが、本発明はこれに限定されない。例えば、第４の支持部材４０と駆動部材５０とが強固に固定されている場合、補助支持部材６０が設けられなくてもよい。 (g) In the above embodiment, the auxiliary support member 60 is fixed to the fourth support member 40 and connected to the drive member 50, but the present invention is not limited to this. For example, if the fourth support member 40 and the drive member 50 are firmly fixed, the auxiliary support member 60 does not need to be provided.

（ｈ）上記実施の形態では、昇降機構ＬＦにおける保持部材８４が一対の取付部材８０の前端部に設けられ、保持部材８５が一対の取付部材８０の後端部に設けられるが、本発明はこれに限定されない。昇降機構ＬＦの保持部材８４，８５が第２の支持部材２０に設けられてもよい。この場合、昇降装置１において、一対の取付部材８０が不要になるため、昇降装置１の構成が単純になる。 (h) In the above embodiment, the holding member 84 of the lifting mechanism LF is provided at the front end of the pair of mounting members 80, and the holding member 85 is provided at the rear end of the pair of mounting members 80, but the present invention is not limited to this. The holding members 84, 85 of the lifting mechanism LF may be provided on the second support member 20. In this case, the pair of mounting members 80 is not necessary in the lifting device 1, and the configuration of the lifting device 1 is simplified.

（ｉ）上記実施の形態では、手押し車の一例として車椅子１００に本発明に係る昇降装置を適用した例を示すが、本発明に係る昇降装置は、車椅子１００に限らず、手押し車としてベビーカー、台車またはストレッチャー等にも同様に適用可能である。 (i) In the above embodiment, the lifting device according to the present invention is applied to a wheelchair 100 as an example of a pushcart. However, the lifting device according to the present invention is not limited to the wheelchair 100 and can be similarly applied to a pushcart such as a stroller, a cart, or a stretcher.

１…昇降装置，１０…第１の支持部材，２０…第２の支持部材，３０…第３の支持部材，３１…スライド部材，３２…ガイド部材，３３，３４…取付部材，４０…第４の支持部材，５０…駆動部材，６０…補助支持部材，７０…操作レバー，８０…取付部材，８１，８２…接続部材，８４，８５，１０７，１０８…保持部材，１００…車椅子，１０１…車体，１０２…前輪，１０３…後輪，１０４…ハンドル部，１０５…ガイドレール，１０６…取付保持部，２００…保持機構，Ａ１…第１の軸，Ａ２…第２の軸，Ａ３…第３の軸，Ａ４…第４の軸，Ａ５…第５の軸，Ａ６…第６の軸，Ａ７…第７の軸，Ｌ…段差，ＬＦ…昇降機構，ＡＴ…取付機構 1...lifting device, 10...first support member, 20...second support member, 30...third support member, 31...slide member, 32...guide member, 33, 34...mounting member, 40...fourth support member, 50...driving member, 60...auxiliary support member, 70...operating lever, 80...mounting member, 81, 82...connecting member, 84, 85, 107, 108...holding member, 100...wheelchair, 101...body, 102...front wheel, 103...rear wheel, 104...handle part, 105...guide rail, 106...mounting and holding part, 200...holding mechanism, A1...first axis, A2...second axis, A3...third axis, A4...fourth axis, A5...fifth axis, A6...sixth axis, A7...seventh axis, L...step, LF...lifting mechanism, AT...mounting mechanism

Claims (4)

手押し車を昇降させる昇降装置であって、
第１の支持部材、第２の支持部材、第３の支持部材、第４の支持部材および駆動部材を含む昇降機構と、
前記昇降機構の前記第２の支持部材を前記手押し車に取り付ける取付機構とを備え、
前記第１の支持部材は、前後方向に延びるように設けられ、
前記第２の支持部材は、前後方向に延び、前記第１の支持部材よりも上方に設けられ、
前記第３の支持部材は、前記第１の支持部材に対して第１の軸の周りで回転可能で、かつ前記第２の支持部材に対して前記第１の軸よりも上方の第２の軸の周りで回転可能に設けられ、
前記第４の支持部材は、前記第１の支持部材に対して前記第１の軸よりも後方の第３の軸の周りで回転可能で、かつ前記第２の支持部材に対して前記第２の軸よりも後方でかつ前記第３の軸よりも上方の第４の軸の周りで回転可能に設けられ、
前記駆動部材は、前記第１の支持部材に対する前記第４の支持部材の角度を変化させることにより前記第２の支持部材を前記第１の支持部材に対して平行な状態で昇降させるために操作可能に構成され、
前記昇降装置は、前記第３の支持部材に対してスライド可能に設けられたスライド部材をさらに含み、
前記第２の軸は前記スライド部材に設けられ、
前記第１の支持部材に対する前記第４の支持部材の角度が小さくなることにより前記第２の支持部材が前記第３の支持部材に近づいた場合に、前記スライド部材が前記第３の支持部材に対して前方にスライドすることにより前記第２の支持部材が前記第３の支持部材にさらに接近するように前記昇降機構が折り畳み可能である、昇降装置。 A lifting device for lifting and lowering a handcart,
a lifting mechanism including a first support member, a second support member, a third support member, a fourth support member and a drive member;
an attachment mechanism for attaching the second support member of the lifting mechanism to the handcart;
The first support member is provided to extend in a front-rear direction,
The second support member extends in the front-rear direction and is provided above the first support member,
the third support member is rotatable about a first axis relative to the first support member and about a second axis above the first axis relative to the second support member;
the fourth support member is rotatable with respect to the first support member about a third axis rearward of the first axis, and is rotatable with respect to the second support member about a fourth axis rearward of the second axis and above the third axis;
the drive member is operable to raise and lower the second support member parallel to the first support member by changing an angle of the fourth support member relative to the first support member;
The lifting device further includes a slide member slidably provided on the third support member,
The second shaft is provided on the slide member,
a lifting device, wherein the lifting mechanism is foldable such that when the angle of the fourth support member relative to the first support member becomes smaller such that the second support member approaches the third support member, the sliding member slides forward relative to the third support member such that the second support member approaches the third support member even closer. 手押し車を昇降させる昇降装置であって、
第１の支持部材、第２の支持部材、第３の支持部材、第４の支持部材および駆動部材を含む昇降機構と、
前記昇降機構の前記第２の支持部材を前記手押し車に取り付ける取付機構とを備え、
前記第１の支持部材は、前後方向に延びるように設けられ、
前記第２の支持部材は、前後方向に延び、前記第１の支持部材よりも上方に設けられ、
前記第３の支持部材は、前記第１の支持部材に対して第１の軸の周りで回転可能で、かつ前記第２の支持部材に対して前記第１の軸よりも上方の第２の軸の周りで回転可能に設けられ、
前記第４の支持部材は、前記第１の支持部材に対して前記第１の軸よりも後方の第３の軸の周りで回転可能で、かつ前記第２の支持部材に対して前記第２の軸よりも後方でかつ前記第３の軸よりも上方の第４の軸の周りで回転可能に設けられ、
前記駆動部材は、前記第１の支持部材に対する前記第４の支持部材の角度を変化させることにより前記第２の支持部材を前記第１の支持部材に対して平行な状態で昇降させるために操作可能に構成され、
前記昇降機構は、前記駆動部材の後端部に第５の軸の周りで回転可能に設けられた操作レバーをさらに含み、
前記操作レバーは、前記第５の軸の後方に延びる状態で前記駆動部材に対する下方への回転角度が制限されるように設けられ、
前記操作レバーが前記第５の軸の後方に延びる状態で前記操作レバーに下方への荷重が加えられた場合に、梃子の原理で前記第１の支持部材に対する前記第４の支持部材の角度が大きくなることにより前記第２の支持部材が上昇し、
前記操作レバーが前記第５の軸の前方に折り畳まれた状態で前記昇降機構が前記手押し車に収納可能である、昇降装置。 A lifting device for lifting and lowering a handcart,
a lifting mechanism including a first support member, a second support member, a third support member, a fourth support member and a drive member;
an attachment mechanism for attaching the second support member of the lifting mechanism to the handcart;
The first support member is provided to extend in a front-rear direction,
The second support member extends in the front-rear direction and is provided above the first support member,
the third support member is rotatable about a first axis relative to the first support member and about a second axis above the first axis relative to the second support member;
the fourth support member is rotatable with respect to the first support member about a third axis rearward of the first axis, and is rotatable with respect to the second support member about a fourth axis rearward of the second axis and above the third axis;
the drive member is operable to raise and lower the second support member parallel to the first support member by changing an angle of the fourth support member relative to the first support member;
the lifting mechanism further includes an operating lever rotatably provided around a fifth axis at a rear end of the driving member,
the operating lever is provided such that a downward rotation angle with respect to the drive member is limited in a state in which the operating lever extends rearward of the fifth shaft,
When a downward load is applied to the operating lever in a state in which the operating lever extends rearward of the fifth shaft, the angle of the fourth support member relative to the first support member increases due to the principle of leverage, so that the second support member rises,
A lifting device, wherein the lifting mechanism is storable in the handcart with the operating lever folded forward of the fifth shaft. 前記駆動部材は、前記第４の支持部材から後方に延びるように前記第４の支持部材に連結され、
前記駆動部材の後端部に下方への荷重が加えられた場合に、梃子の原理で前記第１の支持部材に対する前記第４の支持部材の角度が大きくなることにより前記第２の支持部材が上昇する、請求項１または２記載の昇降装置。 the drive member is coupled to the fourth support member so as to extend rearward from the fourth support member;
3. The lifting device according to claim 1 or 2, wherein when a downward load is applied to the rear end of the drive member, the angle of the fourth support member relative to the first support member increases based on the principle of leverage, thereby causing the second support member to rise. 前記取付機構は、前記昇降機構を前記手押し車に取り外し可能に取り付けるように構成される、請求項１～３のいずれか一項に記載の昇降装置。
A lifting apparatus as claimed in any preceding claim, wherein the mounting mechanism is configured to removably mount the lifting mechanism to the stroller.

Images