WO2003024379A1 - Mecanisme de support de roue avant pour chaise roulante - Google Patents

Mecanisme de support de roue avant pour chaise roulante Download PDF

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Publication number
WO2003024379A1
WO2003024379A1 PCT/JP2002/009248 JP0209248W WO03024379A1 WO 2003024379 A1 WO2003024379 A1 WO 2003024379A1 JP 0209248 W JP0209248 W JP 0209248W WO 03024379 A1 WO03024379 A1 WO 03024379A1
Authority
WO
WIPO (PCT)
Prior art keywords
front wheel
support shaft
wheelchair
axle
horizontal support
Prior art date
Application number
PCT/JP2002/009248
Other languages
English (en)
Japanese (ja)
Inventor
Koji Yoshioka
Original Assignee
Aruze Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aruze Corp. filed Critical Aruze Corp.
Publication of WO2003024379A1 publication Critical patent/WO2003024379A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/045—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted resiliently, by means of dampers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame

Definitions

  • the present invention relates to a support mechanism for supporting a front wheel of a wheelchair.
  • Wheelchairs are a substitute for those with lower body handicap due to accidents, illness, and the elderly. Wheelchairs were mainly used indoors, but as society has become more barrier-free, they have become more and more used outdoors. Along with that, the vibration and impact received by the occupants from unevenness on the road surface and obstacles have become a serious problem. For handicapped occupants, vibrations and shocks can further harm health.
  • the front wheels made of solid tires having a small diameter are simply supported on the body frame as they are, so that the above-mentioned vibrations and shocks are hardly alleviated. Therefore, in recent years, a mechanism 10 for supporting the front wheel 1 via a spring 11 as shown in FIG. 9 (a) has been adopted. By the way, in wheelchairs, the distance between the front and rear wheels is small. Also, when an occupant gets in a wheelchair, the center of gravity increases due to the heavy head. Therefore, the wheelchair on which the occupant rides is never stable. Disclosure of the invention
  • the spring 11 is soft, the occupant will feel the fear of falling. Conversely, if the spring 11 is hard, the vibration and impact received by the occupant due to irregularities on the road surface are hardly alleviated.
  • An object of the present invention is to provide a front wheel support mechanism for a wheelchair, which can reduce vibration and impact received by an occupant from unevenness or obstacles on a road surface and can reduce a fear of falling of the occupant.
  • the invention according to claim 1 is a support mechanism for supporting a front wheel of a wheelchair, further comprising a suspension mechanism for rotatably supporting the front wheel at a lower end portion of a body frame, wherein the suspension mechanism has a crankshaft structure.
  • the crankshaft structure includes a horizontal support shaft rotatably supported at the lower end of the body frame, an axle rotatably supporting the front wheels, and a horizontal support shaft and an axle. And an arm that is positioned at a right angle and connects one end of the horizontal support shaft and one end of the axle.
  • the invention according to claim 2 is the invention according to claim 1, wherein the suspension mechanism includes a control means for controlling a rotation operation of the horizontal support shaft, and the control means includes: It is controlled so that it is easier to take a state that is vertically lower than a state that is directly above the support shaft.
  • the invention according to claim 3 is the invention according to claim 1, wherein a support member is connected to a lower end portion of the vehicle body frame, and the support member is capable of swinging vertically.
  • the upward swing receives the resistance of the elastic body, and the horizontal support shaft is rotatably supported at the lower end of the support member.
  • the invention described in claim 4 is the invention according to claim 3, wherein the support member is rotatable around a vertical axis.
  • the crankshaft structure rotates rearward around the horizontal support shaft.
  • impacts from obstacles can be escaped to the rear. Therefore, the road surface Shock and vibration received by the occupant from the unevenness and obstacles above can be reduced, and the occupant's riding comfort can be improved.
  • the crankshaft structure rotates around the horizontal support shaft, and the axle is positioned vertically below the horizontal support shaft.
  • the crankshaft structure rotates around the horizontal support shaft and the axle is positioned vertically above the horizontal support shaft, so that the impact on the occupant during landing can be reduced. Therefore, also from this point, the ride comfort of the occupants can be improved.
  • the control means promotes the rearward rotation of the crankshaft structure about the horizontal support shaft, and the rotated crankshaft structure attempts to return to the original position. Therefore, the operation of the crankshaft structure can be satisfactorily performed, and the effect based on claim 1 can be satisfactorily exhibited. Therefore, the ride comfort of the occupant can be improved.
  • the support member swings upward against the elastic body. You can release the fire upward. Also, in the event of a collision, the support member comes forward with respect to the front wheels in combination with the operation of the crankshaft structure, so that the amount of displacement in the traveling direction at the time of the collision can be lengthened. Instant shock can be reduced. Therefore, the impact received by the occupant from obstacles and unevenness can be further reduced, and the occupant's riding comfort can be improved.
  • FIG. 1 is a partial longitudinal sectional side view of a wheelchair front wheel support mechanism of the present invention.
  • FIG. 2 is a partial longitudinal sectional front view of the mechanism of FIG.
  • FIG. 3 is a perspective view of a crankshaft structure.
  • FIG. 4 is a sectional view showing the operating principle of the magnet gear.
  • FIG. 5 is a side view showing the operation of the mechanism in FIG. 1 at the time of a collision with an obstacle.
  • FIG. 6 is a side view showing the operation of the mechanism of FIG. 1 when descending a step.
  • FIG. 7 is a partial longitudinal sectional side view of a wheelchair front wheel support mechanism of another example of the present invention.
  • FIG. 8 is a partial longitudinal sectional front view of the mechanism of FIG.
  • FIG. 9 is a side view showing the operation of a conventional front wheel support mechanism for a wheelchair at the time of a collision with an obstacle.
  • FIG. 1 is a partial longitudinal sectional side view of a wheelchair front wheel support mechanism of the present invention
  • FIG. 2 is a partial longitudinal sectional front view of the same.
  • the support mechanism includes a connecting part 2, a plane rotating part 3, a swing mechanism 4, and a suspension mechanism 5.
  • the connecting portion 2 has a vertical rotation shaft 23 in a cylindrical body 21 via a ball bearing 22.
  • the plane rotating unit 3 is fixed to the lower end of the vertical rotating shaft 23. As a result, the plane rotation unit 3 rotates in a plane with the rotation of the vertical rotation shaft 23.
  • the swing mechanism 4 includes a support member 41 and a spring 42.
  • the upper end of the support member 41 is rotatably connected to the plane rotating portion 3 by the horizontal shaft 43, whereby the support member 41 swings up and down.
  • the support member 41 is provided to be inclined rearward.
  • the support member 41 has a rearward projecting portion 411.
  • the spring 42 is provided between the rearward projecting portion 4 11 and the plane rotating portion 3 so as to resist when the support member 41 swings upward.
  • the suspension mechanism 5 that rotatably supports the front wheel 1 is provided.
  • the suspension mechanism 5 includes a crankshaft structure 50.
  • the crank shaft structure 50 includes a horizontal support shaft 51 rotatably supported at the lower end of the support member 41, an axle 52 rotatably supporting the front wheel 1, a horizontal support shaft 51, and Axle 5 2 And an arm 53 that is positioned at a right angle to and connects one end of the horizontal support shaft 51 and one end of the axle 52.
  • the horizontal support shaft 51 is supported by the support member 41 via a ball bearing 511.
  • the axle 52 is supported by the front wheel 1 via a ball bearing 52 1.
  • FIG. 3 is a perspective view of the crankshaft structure 50.
  • the suspension mechanism 5 further includes control means for controlling the rotation operation of the horizontal support shaft 51.
  • the control means comprises a magnet gear 55.
  • the magnet gear 55 When the axle 52 is vertically above the horizontal support shaft 51 in the crankshaft structure 50, as shown in FIG. 4 (a), the magnet gear 55 The pole and the north pole and the south pole and the north pole on the support member 41 side are provided such that the poles face each other. Accordingly, the magnetic gear 55 changes the relationship between the horizontal support shaft 51 and the support member 41 from the state shown in FIG. 4A to the state shown in FIG. Act to make it work.
  • FIG. 5 (a) shows the state before the collision
  • FIG. 5 (b) shows the state at the time of the collision.
  • the crankshaft structure 50 rotates around the horizontal support shaft 51 in the direction of arrow B, and the support member 41 also moves.
  • the horizontal axis 4 swings in the direction of arrow C in the direction of arrow C, so that the movements of the two cancel each other up and down fluctuations of the plane rotating part 3, and the sinking amount H2 of the plane rotating part 3 is Is very small compared to H 1 in the case of. Therefore, front turning at the time of collision is suppressed. Is done.
  • the suspension mechanism 5 when the front wheel 1 descends on the large step 62, the suspension mechanism 5 operates as follows.
  • the magnet gear 55 In the state (a) of FIG. 6, the magnet gear 55 is in the state (a) of FIG. Therefore, the magnet gear 55 tries to rotate the crankshaft structure 50 around the horizontal support shaft 51.
  • the crankshaft structure 50 becomes the horizontal support shaft 51.
  • the axle 52 Rotating around, the axle 52 is positioned vertically below the horizontal support shaft 51. That is, the magnet gear 55 is in the state of (b) in FIG.
  • the crankshaft structure 50 rotates around the horizontal support shaft 51 while resisting the force of the magnet gear 55, as shown in (c).
  • the axle 52 is positioned vertically above the horizontal support shaft 51.
  • the crankshaft structure 50 is forcibly and instantaneously brought to the state of (a) force (b) by the action of the magnet gear 55, c)
  • the front wheel 1 descends the step 62 as in the case of the spring force, it rotates around the horizontal support shaft 51 while resisting the force of the magnet gear 55 in the state of c). The impact on the occupants is reduced.
  • the magnet gear 55 acts so that the above-described operation of the crankshaft structure 50 can be satisfactorily performed even when the front wheel 1 collides with the obstacle 61 or gets over unevenness. That is, the magnet gear 55 promotes the rotation of the crankshaft structure 50 backward about the horizontal support shaft 51, and prevents the rotated crankshaft structure 50 from returning to the original position. Since it acts to suppress, the above-described operation of the crankshaft structure 50 is favorably exhibited, and the impact vibration is further reduced.
  • the impact and vibration received by the occupant from the obstacle 61, the unevenness, and the step 62 force are reduced, so that a good ride comfort can be obtained.
  • the occupant's fear of falling is reduced.
  • FIG. 7 and 8 show another example of the front wheel supporting mechanism for a wheelchair of the present invention.
  • FIG. 7 is a partial longitudinal sectional side view
  • FIG. 8 is a partial longitudinal sectional front view.
  • the difference from the mechanism is that the front wheel 1 is cantilevered by the support member 41, and that the rocking mechanism 4 uses a piston mechanism 44 instead of the spring 42.
  • the piston mechanism 44 includes a cylinder 442 rotatably connected to the plane rotating unit 3 by a horizontal shaft 441, and a piston 4444 rotatably connected to the support member 41 by a horizontal shaft 43.
  • Rubber material 4 4 5 and The piston 444 is fitted into the cylinder 442 via a rubber member 445.
  • the piston 444 moves in the direction of arrow D while piled on the force of the rubber member 445.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

L'invention concerne un mécanisme de support de roue avant pour chaise roulante permettant d'amortir les vibrations et les chocs dus aux irrégularités et aux obstacles présents sur la surface d'une route, et d'ainsi réduire la peur de se retourner qu'éprouve l'utilisateur de cette chaise roulante. Un mécanisme de suspension (5) pourvu d'un corps structural de vilebrequin (50) et d'un engrenage magnétique (55) est monté sur la partie d'extrémité inférieure du châssis de cette chaise roulante par l'intermédiaire d'une partie de raccordement (2), d'une partie rotative plane (3) et d'un élément de support (41), le corps structural de vilebrequin comprenant également un arbre de support horizontal (51) supporté rotatif par la partie d'extrémité inférieure de l'élément de support, un axe (52) assurant le support rotatif de la roue avant (1), et un bras (53) disposé perpendiculairement à l'arbre de support horizontal et à l'axe, et raccordant une extrémité de l'arbre de support horizontal à une extrémité de cet axe.
PCT/JP2002/009248 2001-09-12 2002-09-11 Mecanisme de support de roue avant pour chaise roulante WO2003024379A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001276893A JP2003079671A (ja) 2001-09-12 2001-09-12 車椅子用前輪支持機構
JP2001-276893 2001-09-12

Publications (1)

Publication Number Publication Date
WO2003024379A1 true WO2003024379A1 (fr) 2003-03-27

Family

ID=19101524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/009248 WO2003024379A1 (fr) 2001-09-12 2002-09-11 Mecanisme de support de roue avant pour chaise roulante

Country Status (3)

Country Link
JP (1) JP2003079671A (fr)
TW (1) TW558441B (fr)
WO (1) WO2003024379A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2855964A1 (fr) * 2003-06-13 2004-12-17 Pi Hsiang Machinery Mfg Co Structure de suspension pour ensemble de roue avant de chaise roulante
CN103735375A (zh) * 2014-01-24 2014-04-23 上海理工大学 电动轮椅万向移动转换机构
CN107595498A (zh) * 2017-09-14 2018-01-19 刘志超 一种医用轮椅
US20210369517A1 (en) * 2020-06-02 2021-12-02 Toyota Motor North America, Inc. Support Devices Including Collapsible Casters

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4638772B2 (ja) * 2005-06-09 2011-02-23 株式会社松永製作所 車椅子用のダブルリンク付き衝撃吸収キャスター
GB201301578D0 (en) * 2013-01-29 2013-03-13 Dyson Technology Ltd Mobile robot
CN104068977A (zh) * 2013-03-29 2014-10-01 陈紫薇 可爬梯轮椅
US9393166B2 (en) 2013-12-19 2016-07-19 King Fahd University Of Petroleum And Minerals Wheelchair suspension system comprising of an encased set of springs with a damper, and method for enhancing stability
US10315900B2 (en) 2014-04-01 2019-06-11 The Raymond Corporation Caster wheel with constant force mechanism
US9593003B2 (en) * 2014-04-01 2017-03-14 The Raymond Corporation Caster wheel with constant force mechanism
KR101982324B1 (ko) * 2017-05-02 2019-05-24 이일열 휠체어용 캐스터
CN107049632B (zh) * 2017-06-20 2018-08-31 国家康复辅具研究中心 轻型便携式电动轮椅车
CN112172412A (zh) * 2020-09-28 2021-01-05 杭州昌墨科技有限公司 一种适用于可移动计算机辅助设备的减震轮
CN115054453B (zh) * 2022-06-13 2024-05-24 天津曼顿科技有限公司 一种具有防倾倒结构的安全型轮椅

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Publication number Priority date Publication date Assignee Title
JPS5747567U (fr) * 1980-08-28 1982-03-17
JPS6437230U (fr) * 1987-08-31 1989-03-07
JP2001277807A (ja) * 2000-04-04 2001-10-10 Kayaba Ind Co Ltd キャスター

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH085914Y2 (ja) * 1985-06-27 1996-02-21 スズキ株式会社 電動車椅子の駆動装置
WO1998016417A1 (fr) * 1996-10-17 1998-04-23 Tomio Kakimi Dispositif de suspension comportant un moyeu de type manivelle
JP2000300615A (ja) * 1999-04-22 2000-10-31 Uirii:Kk 車いす

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747567U (fr) * 1980-08-28 1982-03-17
JPS6437230U (fr) * 1987-08-31 1989-03-07
JP2001277807A (ja) * 2000-04-04 2001-10-10 Kayaba Ind Co Ltd キャスター

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2855964A1 (fr) * 2003-06-13 2004-12-17 Pi Hsiang Machinery Mfg Co Structure de suspension pour ensemble de roue avant de chaise roulante
BE1015901A5 (fr) * 2003-06-13 2005-11-08 Pi Hsiang Machinery Mfg Co Structure de suspension pour ensemble de roues avant d'un fauteuil roulant.
LU91053B1 (de) * 2003-06-13 2006-01-17 Pi Hsiang Machinery Mfg Co Aufh{ngestruktur f}r einen Vorderradaufbau eines Rollstuhles
CN103735375A (zh) * 2014-01-24 2014-04-23 上海理工大学 电动轮椅万向移动转换机构
CN107595498A (zh) * 2017-09-14 2018-01-19 刘志超 一种医用轮椅
US20210369517A1 (en) * 2020-06-02 2021-12-02 Toyota Motor North America, Inc. Support Devices Including Collapsible Casters
US11547618B2 (en) * 2020-06-02 2023-01-10 Toyota Motor North America, Inc. Support devices including collapsible casters

Also Published As

Publication number Publication date
TW558441B (en) 2003-10-21
JP2003079671A (ja) 2003-03-18

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