WO2021261300A1 - 車椅子用走行補助具 - Google Patents

車椅子用走行補助具 Download PDF

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Publication number
WO2021261300A1
WO2021261300A1 PCT/JP2021/022379 JP2021022379W WO2021261300A1 WO 2021261300 A1 WO2021261300 A1 WO 2021261300A1 JP 2021022379 W JP2021022379 W JP 2021022379W WO 2021261300 A1 WO2021261300 A1 WO 2021261300A1
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WIPO (PCT)
Prior art keywords
resin
wheelchair
slope
reinforcing
traveling
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2021/022379
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English (en)
French (fr)
Japanese (ja)
Inventor
松下昌之
星川淳一郎
谷口比呂実
浅原信雄
野口洋平
田中章
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Rubber Industries Ltd
Toray Industries Inc
Original Assignee
Sumitomo Rubber Industries Ltd
Toray Industries Inc
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 Sumitomo Rubber Industries Ltd, Toray Industries Inc filed Critical Sumitomo Rubber Industries Ltd
Priority to JP2021542169A priority Critical patent/JP7606968B2/ja
Priority to US18/010,837 priority patent/US20230235565A1/en
Priority to CN202180024235.2A priority patent/CN115361929A/zh
Priority to EP21828923.9A priority patent/EP4173923A4/en
Publication of WO2021261300A1 publication Critical patent/WO2021261300A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/002—Ramps
    • 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
    • A61G3/00—Ambulance aspects of vehicles; Vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances, e.g. for facilitating access of, or for loading, wheelchairs
    • A61G3/02—Loading or unloading personal conveyances; Facilitating access of patients or disabled persons to, or exit from, vehicles
    • A61G3/06—Transfer using ramps, lifts or the like
    • A61G3/061—Transfer using ramps, lifts or the like using ramps
    • 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

Definitions

  • the present invention relates to a slope that is used by hanging over a step generated between objects, and is lightweight, has excellent load resistance and durability, and is excellent in safety when a wheelchair user gets on and off a train, and transports the slope itself.
  • the present invention relates to a wheelchair-accessible running aid used for a portable slope having excellent properties.
  • a portable slope has been used to allow it to be installed and used only when necessary, for example, when moving a wheelchair from the platform to the inside of a train, from the entrance of a train to the platform, or When moving a wheelchair from the road to the inside of a bus or from the entrance of a bus to the road, a transfer board that connects the platform and the inside of the train or a transfer plate that connects the road and the inside of the bus is used. In some cases.
  • a wheelchair slope is a self-propelled electric wheelchair or a device that allows one person in need of care to move on and off the board by assisting maneuvering on the wheelchair. Therefore, when dealing with a higher height difference, the slope does not impair the strength and rigidity of the slope that prevents passersby from falling and falling, and the lightness to reduce the burden on the slope temporary person. Needs to be lengthened.
  • Patent Document 1 a slope for getting on and off a train that is used by being hung between a train entrance and a platform, one end of which is mounted on the entrance and the other end of which is mounted on the platform.
  • a plate-shaped slope body having a length and a width that allows a wheelchair to pass, and a base piece that is fixed to the edge of the slope body on one end side and extends in a direction away from the slope body.
  • a hook member having a hanging piece that can be engaged with a step portion provided at the entrance / exit by bending downward, and the hook member are swingably connected to the hook member around an axis along the width direction of the slope body.
  • a train boarding / alighting slope whose main body is made of fiber-reinforced resin is described, including a flap that extends away from the base piece. It is equipped with a plate-shaped slope body that has a width that allows wheelchairs to pass through. Therefore, wheelchair users can easily move between the platform and the train by traveling on the slope body. The effect of "can be done” is disclosed.
  • Patent Document 1 it is only described that the fiber reinforced resin is used for the slope main body, and there is no description regarding the reinforcing structure of the support end portion of the slope.
  • a plywood is composed of at least two or more plywoods in which a plate material made of fiber reinforced plastic (FRP: Fiber Reinforced Plastic) is bonded to both front and back surfaces of a square core material made of foamable resin.
  • FRP Fiber Reinforced Plastic
  • Each of the upper and lower ends in the passage direction has tapered structures 4 and 5 for eliminating the step of the plywood itself, and has a structure in which the outer surface in the passage direction is fitted by the frame member 9, and two or more plywoods are formed.
  • a configuration is described in which the plywoods are arranged in parallel in the traffic direction, the opposite side surfaces of the plywoods are connected by the sheet material 6, and the plywoods are folded so as to overlap each other.
  • the slope is composed of plywood in which carbon fiber reinforced plastic is adhered to both the front and back surfaces of a core material made of a foamable resin such as hard urethane, polypropylene or acrylic.
  • the plywood is a laminated structure in which carbon fiber reinforced plastic is firmly adhered to both the front and back surfaces of the foamable resin, and it is necessary to take a plurality of steps in the manufacturing process of the laminated structure. There is a cost issue. Further, although it is possible to improve the rigidity by forming a laminated structure with the foam up to the end of the slope, there is no productivity and weight reduction is lost due to the weight of the foam.
  • Patent Document 3 in a portable slope made of a plurality of fiber-reinforced plastic plates used over a step generated between objects, the height h is set on the upper surface of the plate end located on both the left and right sides of the portable slope.
  • the derailment prevention wall is installed in the above, and the configuration that the height h, thickness t, and surface pressure resistance of the derailment prevention wall are within a certain value is described, whereby even if the wheel gets on the wheel, it can be removed.
  • the effect of "the ring prevention wall is hard to break, lightweight and easy to carry” is disclosed.
  • a method of integrally molding a plate material and a derailment prevention wall is preferably described.
  • a core material made of rigid foamed polyurethane or the like For example, after reinforcing fibers are wound around the surface of a core material made of rigid foamed polyurethane or the like and set in a mold.
  • An example is the configuration in which the plate material and the derailment prevention wall are integrally molded by pouring a matrix agent into this mold, and the plate material and the derailment prevention wall are integrally molded by this, so that the derailment prevention is prevented.
  • the wall is said to be more difficult to break.
  • Patent Document 3 Although the rigidity can be improved by the laminated structure, the weight reduction is lost due to the weight of the foam, and there is room for improvement in the lightness.
  • the slope main body is a portable slope including a plate-shaped core made of corrugated cardboard and a reinforcing layer made of a fiber-reinforced resin material attached to at least the upper surface and the lower surface of the plate-shaped core.
  • a plate-shaped core made of corrugated cardboard
  • a reinforcing layer made of a fiber-reinforced resin material attached to at least the upper surface and the lower surface of the plate-shaped core.
  • the slope main body has a plate-shaped core made of corrugated cardboard and a reinforcing layer structure made of a fiber-reinforced resin material attached to at least the upper surface and the lower surface of the plate-shaped core, and is a laminated structure. Since it is necessary to take a plurality of steps in the manufacturing process of the corrugated cardboard, there is a problem in terms of manufacturing cost.
  • Patent Document 5 in a slope device that enables wheelchairs and the like to be taken in and out, the floor members constituting the slope are divided into a plurality of parts in a direction intersecting the deployment direction of the slope, and the adjacent floor members are used.
  • a configuration is described in which an engaging portion that can be engaged with each other is integrally provided on the end faces facing each other.
  • a plurality of floor members are provided. The effect of being able to receive the load on the slope, smoothing the operation when deploying and storing the slope without reducing the rigidity of the floor member, and eliminating the need to reinforce the floor member with another member is disclosed. There is.
  • the ultra-lightweight portable slope 100 has a main body side surface portion 90 integrally molded with a derailment prevention bar 43 on both side surfaces, and a central side surface portion 91 in which the train side is shortened and a hinge 42 is screwed.
  • the surface portion 80 can be folded in two at the central side surface portion 91 arranged side by side in the central portion, is symmetrical, and is provided as a flat floor surface integrally molded with an inclined surface through which a large wheelchair can pass.
  • plates that vertically support the back surface are provided as reinforcing portions at equal intervals.
  • Nylon bands 44 are provided at the side folds of the main body 90 on both sides and the platform side of the central side surface 91.
  • a hanging metal fitting 40 that is fixedly provided and hooked on the door rail on the train side is fixedly provided on the train side of the surface portion 80.
  • a flat surface portion 90, the surface portion 80, and the reinforcing portion are fixedly provided.
  • a large number of through holes are formed in the ultraduralmin AL2024 used for the floor surface. ” The effect of improving the rigidity of the slope by the hollow segment is disclosed.
  • Patent Document 6 since it is made of duralumin, which is heavier than CFRP, and the integral molding is also welding, there is room for improvement in weight reduction.
  • the member is provided with a wind through hole, and there is a limit to achieving both lengthening and weight reduction due to a decrease in member rigidity.
  • Patent Document 7 "Also, in a direction orthogonal to the connecting direction (direction of arrow 11 shown in FIG. 1) of the plate-shaped member 2a, the plate-shaped member 2b, the plate-shaped member 2c, and the plate-shaped member 2d (in FIG. 1).
  • a hook-shaped member 5a, a hook-shaped member 5b, a hook-shaped member 5c, and a hook-shaped member 5d are attached to each end of each end of the direction of the arrow 12 (hereinafter referred to as “flow direction”) as a protrusion, and are plate-shaped.
  • a rubber cap 7a, a rubber cap 7b, a rubber cap 7c, and a rubber cap 7d as anti-slip members are attached to the other ends of the member 2a, the plate-shaped member 2b, the plate-shaped member 2c, and the plate-shaped member 2d, respectively. There is. The structure of the end of the slope is disclosed.
  • the portable slope 1 is, for example, between a train entrance / exit and a platform.
  • the upper end side 3 of the slope 1 is arranged at the entrance / exit on the train side
  • the lower end side 4 of the slope 1 is arranged on the platform side.
  • the lower end side 4 is formed in a tapered shape so as to have a certain inclination so as to facilitate the getting on and off of the wheelchair.
  • the contact position with the entrance / exit of the slope 1 and / or the platform It is also preferable that a non-slip rubber member is appropriately fixed to the contact position.
  • the upper end side 3 and the lower end side 4 of the slope 1 are made of lightweight and inexpensive plastic.
  • Patent Document 8 there is no description about the insertion structure of the end portion of the slope, and no suggestion of improving the strength of the end portion is made.
  • this article is a portable slope used by hanging over a step generated between a building or an object for a train, and has a shape in which a reinforcing portion is provided in the longitudinal direction on the lower surface of the slope.
  • this article is lightweight and has excellent transportability, as well as excellent load resistance and high rigidity.
  • derailment protective walls By installing derailment protective walls on both sides of the slope, wheelchair users can safely transport on the slope.
  • This article is foldable because two slopes are connected, and can be unfolded and used when in use. Both ends of the slope in the longitudinal direction should have a certain inclination to facilitate getting on and off the wheelchair. , Each is formed in a tapered shape. ”, And the effect of improving the portability of the slope is disclosed.
  • Patent Document 9 there is no description about the insertion structure of the end portion of the slope, and no suggestion of improving the strength of the end portion is made.
  • Patent Document 10 describes a configuration of "the portable slope according to claim 2, wherein the connection portion is formed so as to be insertable into the hollow portion.” The structure to be joined is disclosed.
  • Patent Document 10 Although there is a description for the insertion portion of the slope, there is no description for the support portion, and no specific joint structure for alleviating stress concentration is suggested.
  • the present invention relates to a slope that is used by hanging over a step generated between objects, and is lightweight, has excellent transportability of the slope itself, has excellent load bearing capacity and durability, and can be used in a wheelchair.
  • a wheelchair running aid used for slopes that is excellent in safety while ensuring rigidity when a load is applied on the slope when used by a person and can cope with steps by making it longer. With the goal.
  • a wheelchair traveling assisting tool formed of hollow segments, which is attached to an end portion of the traveling path member and is an end member for introducing the wheelchair into the traveling path portion, wherein the end member is the above-mentioned traveling assisting tool.
  • a wheelchair traveling assisting tool having an insertion portion inserted into the end portion of the reinforcing portion and a support portion for supporting the end portion of the reinforcing portion from below.
  • a hollow slope used by a wheelchair user to overcome a step existing in a building or a step generated between the entrance and exit of a vehicle such as a passenger car, a train, or a bus and the ground. It is possible to alleviate the stress concentration generated at the support end of the high-rigidity hollow slope with respect to bending in the passing direction and improve the strength. By increasing the strength of the support end, it is possible to achieve both a weight reduction of 12 kg for the hollowed slope and a long slope length of 3 m, and the short lightweight slope has a steep slope and cannot be exceeded by a wheelchair. By using the present invention, it is possible to temporarily install a lightweight slope with an inclination gradient of 14 ° or less for a step with a height difference of 70 cm, and it is possible to ensure the safety of the caregiver and reduce the burden.
  • slopes that are used by hanging over steps created between buildings and objects for trains, they are lightweight, have excellent transportability of the slope itself, and have excellent load bearing capacity and durability. It is possible to provide a wheelchair traveling assisting tool used for a slope that is excellent in safety while ensuring rigidity when a load is applied and can cope with a high step by lengthening the length.
  • the configuration of the present invention made to solve the above-mentioned problems is a traveling path portion on which a wheelchair travels, a traveling path member provided with a reinforcing portion for reinforcing the traveling path portion from below, and the reinforcing portion being a traveling path portion.
  • a wheelchair traveling assisting tool formed by a plurality of hollow segments arranged in a single parallel in the passing direction, and comprising an end member attached to an end portion of the traveling path member to introduce the wheelchair into the traveling path portion.
  • the end member is a wheelchair traveling assisting tool, characterized in that it has an insertion portion inserted into the end portion of the reinforcing portion and a support portion that supports the end portion of the reinforcing portion from below.
  • a hollow slope used by a wheelchair user to overcome a step existing in a building or a step generated between the entrance and exit of a vehicle such as a passenger car, a train, or a bus and the ground. It is possible to alleviate the stress concentration generated at the support end of the high-rigidity hollow slope with respect to bending in the passing direction and improve the strength. By increasing the strength of the support end, it is possible to achieve both a weight reduction of 12 kg for the hollowed slope and a long slope length of 3 m, and the short lightweight slope has a steep slope and cannot be exceeded by a wheelchair. By using the present invention, it is possible to temporarily install a lightweight slope with an inclination gradient of 14 ° or less for a step with a height difference of 70 cm, and it is possible to ensure the safety of the caregiver and reduce the burden.
  • FIG. 1 shows a perspective view seen from diagonally above the slope according to the present invention.
  • 1 indicates a slope through which a wheelchair or the like passes, and 2 indicates a traveling path portion.
  • the slope 1 is used, for example, by being hung between the entrance and exit of a car and a road.
  • the end member 3 on the upper end side of the slope 1 is arranged at the entrance / exit on the automobile side, and the end member 4 on the lower end side of the slope 1 is arranged on the road side.
  • the end member 3 on the upper end side and the end member 4 on the lower end side of the slope 1 are retrofitted parts joined to the track member 2, and are tapered so as to have a constant inclination to facilitate getting on and off the wheelchair. Is formed by.
  • a non-slip rubber member is appropriately fixed to the contact position with the entrance / exit of the slope 1 and / or the contact position with the platform.
  • FIG. 2 shows a perspective view of the slope according to the present invention as viewed from diagonally below.
  • 5 indicates a hollow segment.
  • the hollow segment 5 is arranged in a long and continuous shape in a direction substantially parallel to the vertically long direction of the traveling path member 2, which is the passing direction of a moving object such as a wheelchair.
  • a long structure continuous from the vicinity of the end member 3 to the vicinity of the end member 4 can withstand the local load. ..
  • the runway member 2 and the hollow segment 5 are preferably formed of carbon fiber reinforced plastic having excellent specific strength and specific rigidity from the viewpoint of weight reduction effect.
  • the reinforcing fibers may be polyacrylonitrile (PAN) -based, rayon-based, lignin-based, pitch-based carbon fibers, or those having a surface treatment applied to these fibers.
  • the surface treatment includes a treatment with a coupling agent, a treatment with a sizing agent, a treatment with a binding agent, a treatment with an additive, and the like. Further, one type of these reinforcing fibers may be used alone, or two or more types may be used in combination.
  • the fiber-reinforced resin is composed of the reinforcing fiber and the matrix resin
  • the matrix resin includes an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol (resole type) resin, and the like.
  • Thermo-curable resins such as polyimide resin, polyethylene terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, polytrimethylene terephthalate (PTT) resin, polyethylene naphthalate (PEN resin), polyester resin such as liquid crystal polyester resin, etc.
  • Polyarylene sulfide resin such as polyethylene (PE resin), polypropylene (PP resin), polybutylene resin, polyoxymethylene (POM) resin, polyamide (PA) resin, polyphenylene sulfide (PPS) resin, polyketone ( Fluorine resins such as PK) resin, polyether ketone (PEK) resin, polyether ether ketone (PEEK) resin, polyether ketone ketone (PEKK) resin, polyether nitrile (PEN) resin, polytetrafluoroethylene resin, liquid crystal.
  • PE resin polyethylene
  • PP resin polypropylene
  • PPS polybutylene resin
  • POM polyoxymethylene
  • PA polyamide
  • PPS polyphenylene sulfide
  • Fluorine resins such as PK) resin, polyether ketone (PEK) resin, polyether ether ketone (PEEK) resin, polyether ketone ketone (PEKK) resin, polyether nitrile (PEN)
  • thermoplastic elastomers such as polystyrene-based resin, polyolefin-based resin, polyurethane-based resin, polyester-based resin, polyamide-based resin, polybutadiene-based resin, polyisoprene-based resin, fluororesin, and acrylonitrile-based resin, and their co-weights.
  • Thermoplastic resins such as coalesced and modified ones can be used. Among them, it is preferable to use an epoxy resin or a vinyl ester resin in consideration of the adhesiveness with carbon fibers, the mechanical properties of the molded body, and the moldability.
  • the weight fiber content of the carbon fiber of the fiber reinforced resin is in the range of 15 to 80% by weight. If the content is less than 15% by weight, the load bearing capacity and rigidity are lost and the predetermined desired function cannot be achieved. If the weight content exceeds 80% by weight, a problem that voids are easily generated in the fiber reinforced resin is likely to occur, and molding becomes difficult.
  • the control allowable range of the weight content small, preferably the weight content is 30 to 75% by weight, and more preferably 40. It is ⁇ 75% by weight.
  • the traveling path member 2 and the hollow segment 5 are integrated and the fiber of the fiber reinforced plastic to be formed is a continuous carbon fiber.
  • the reinforcing fibers may be arranged parallel to the longitudinal direction, which is the spanning direction of the slope, or substantially perpendicular to the longitudinal direction. Further, when these arrangements are combined, the bending strength and the surface pressure resistance of the entire slope are improved.
  • the resin material used for the end member 3 and the end member 4 in the present invention is not particularly limited, and may be a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol (resole type) resin, or a polyimide resin.
  • a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol (resole type) resin, or a polyimide resin.
  • PET Polyetherketone terephthalate
  • PBT polybutylene terephthalate
  • PTT polytrimethylene terephthalate
  • PEN resin polyethylene naphthalate
  • polyester resin such as liquid crystal polyester resin, polyethylene (PE resin), polypropylene
  • Polyetherketone (PK) resin Polyetherketone (PEK) resin
  • Polyetherketone (PK) resin Polyetherketone (PK) resin
  • Polyetherketone (PK) resin Polyetherketone (PK) resin
  • PK Polyetherketone
  • PK Polyetherketone
  • PK Polyetherketone
  • PK Polyetherketone
  • PEK Polyetherketone
  • PEK Polyetherketone
  • PEK Polyetherketone
  • PEK Polyetherketone
  • polystyrene resin polycarbonate (PC) resin, polymethylmethacrylate (PMMA) resin, polyvinyl chloride (PVC) resin, polyphenylene ether (PPE) resin, polyimide (PI) resin, polyamideimide (PAI) resin, poly Acrylic resins such as etherimide (PEI) resin, polysalphon (PSU) resin, polyethersalphon resin, polyallylate (PAR) resin, other phenol-based resins, phenoxy resins, polystyrene-based resins, polyolefin-based resins, etc.
  • PC polycarbonate
  • PMMA polymethylmethacrylate
  • PVC polyvinyl chloride
  • PPE polyphenylene ether
  • PI polyimide
  • PAI polyamideimide
  • PAI polyamideimide
  • Acrylic resins such as etherimide (PEI) resin, polysalphon (PSU) resin, polyethersalphon resin, polyallylate (PAR) resin, other phenol-
  • Thermoplastic elastomers such as polyurethane-based resins, polyester-based resins, polyamide-based resins, polybutadiene-based resins, polyisoprene-based resins, fluororesins, and acrylonitrile-based resins, and thermoplastic resins such as copolymers and modified products thereof. Can be used. Above all, in order to suppress buckling deformation and shear deformation of the slope body, a member having structural shear resistance is preferable, and from the viewpoint of weight reduction effect, it is preferably formed of fiber reinforced plastic.
  • the reinforcing fiber is not particularly limited, and is, for example, metal fiber such as aluminum, brass, stainless steel, polyacrylic nitrile (PAN) -based, rayon-based, lignin-based, pitch-based carbon fiber, graphite fiber, glass, etc.
  • metal fiber such as aluminum, brass, stainless steel, polyacrylic nitrile (PAN) -based, rayon-based, lignin-based, pitch-based carbon fiber, graphite fiber, glass, etc.
  • PAN polyacrylic nitrile
  • Examples thereof include insulating fibers of the above, organic fibers such as aramid resin, polyphenylene sulfide resin, polyester resin, acrylic resin, nylon resin and polyethylene resin, and inorganic fibers such as silicon carbide and silicon nitride. Further, these fibers may be surface-treated.
  • the surface treatment includes a treatment with a coupling agent, a treatment with a sizing agent, a treatment with a binding agent, a treatment with an additive, and the like, in addition to a treatment with a metal as a conductor.
  • these reinforcing fibers may be used alone, or two or more types may be used in combination.
  • PAN-based, pitch-based, rayon-based and other carbon fibers having excellent specific strength and specific rigidity are preferably used from the viewpoint of weight reduction effect.
  • PAN-based carbon fibers having excellent mechanical properties such as strength and elastic modulus can be more preferably used.
  • discontinuous fibers may be used, or continuous fibers may be used. It is preferable that the reinforcing fibers are arranged in two or more directions and strengthened, and more preferably, the in-plane shear elastic modulus of the reinforcing member is 3000 MPa or more.
  • FIG. 3 shows a perspective view of the joint portion between the runway portion 2 of the slope and the end members 3 and 4.
  • 6a, 6b, and 6c indicate the hollow portion of the hollow segment
  • the insertion portions 7a, 7b, and 7c of the end members 3 and 4 are inserted, respectively, and the traveling path portion 2 and the end members 3 and 4 are joined.
  • .. 8a and 8b of the end members 3 and 4 are support portions that support the travel path portion 2 from below, and are located between the insertion portions 7a, 7b and 7c to support the travel path portion 2.
  • the tip bending cross section of the insertion portions 7 of the end members 3 and 4 runs in the longitudinal bending of the slope 1. Stress concentrates on the boundary where the road member 2 and the hollow segment 5 are integrated, and the strength of the slope 1 is impaired.
  • the extension lengths of the insertion portion 7 and the support portion 8 it is possible to prevent stress from being concentrated on a specific bending cross section and improve the slope strength. Further, it is preferable that the extension length of the support portion 8 is longer than that of the insertion portion 7, and it is preferable that the insertion portions 7a, 7b, and 7c each have the same insertion length.
  • the insertion lengths of the insertion portions 7a, 7b, and 7c are different, shear stress is concentrated on the surface where the tip of the longest insertion portion and the traveling road surface 2 are in contact, and the strength of the slope is reduced. More preferably, the insertion length of the insertion portion 7 is 1 times or more and 3 times or less the length of the support portion 8, and further preferably 1.5 times or more and 2 times or less.
  • FIG. 4 shows a cross-sectional view AA of the joint portion between the runway portion 2 of the slope and the end members 3 and 4. It is preferable to form a chamfer shape on the side of the traveling road surface 2 of the insertion portion 7 of the end members 3 and 4 inserted into the hollow segment 5 in order to alleviate stress concentration. More preferably, the C chamfer is 5 mm or more. More preferably, the R chamfer is 5 mm or more.
  • the removable reinforcing member 9 is inserted into the hollow portion 6 of the hollow segment 5 of the slope 1, and the reinforcing member is formed of at least one or more surfaces, and is among the reinforcing members. It is a reinforcing structure in which at least one surface is in contact with the surface of the hollow segment.
  • the slope 1 is made longer, deformations other than pure bending deformation such as buckling deformation and twisting deformation will occur. In addition, the influence of vibration becomes large and the comfort during use is impaired.
  • the reinforcing member 9 By inserting the reinforcing member 9 into the hollow segment 5 of the slope 1 and joining and integrating the reinforcing member 9 with the end members 3 and 4, the slope can be further made more rigid and the length can be extended. Furthermore, since local deformation is suppressed, the usability and comfort during slope running are also improved.
  • a carbon fiber composite material is preferable for the reinforcing member 9 in the case of increasing the rigidity and strength, and a rubber material having a vibration marshal action is preferable in the case of having a vibration suppressing function. It is possible to impart functionality to the slope 1 without changing the appearance of the slope 1 depending on the material of the reinforcing member 9.
  • the resin material used for the reinforcing member 9 in the present invention is not particularly limited, and is heat-curable resin such as epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol (resole type) resin, and polyimide resin, and polyethylene terephthalate (polyetheretherketone).
  • heat-curable resin such as epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol (resole type) resin, and polyimide resin, and polyethylene terephthalate (polyetheretherketone).
  • PET polytylene terephthalate
  • PBT polytrimethylene terephthalate
  • PEN polyethylene naphthalate
  • PET polyethylene
  • PBT polytrimethylene terephthalate
  • PEN resin polyethylene naphthalate
  • PET polyethylene
  • PPS polypropylene
  • Polyetherketone resin such as polybutylene resin
  • polyarylene sulfide resin such as polyoxymethylene (POM) resin
  • PA polyamide
  • PPS polyphenylene sulfide
  • PK polyetherketone
  • PEK polyetherketone
  • PEEK polyetherketone
  • PEKK polyetherketoneketone
  • PEN polyethernitrile
  • fluororesin such as polytetrafluoroethylene resin
  • crystalline resin such as liquid crystal polymer (LCP), styrene resin
  • PC polycarbonate
  • PMMA polymethylmethacrylate
  • PVC polyvinyl chloride
  • PVC polyvinyl chloride
  • PVC
  • the reinforcing fiber is not particularly limited, and is, for example, metal fiber such as aluminum, brass, stainless steel, polyacrylic nitrile (PAN) -based, rayon-based, lignin-based, pitch-based carbon fiber, graphite fiber, glass, etc.
  • PAN polyacrylic nitrile
  • Examples thereof include insulating fibers of the above, organic fibers such as aramid resin, polyphenylene sulfide resin, polyester resin, acrylic resin, nylon resin and polyethylene resin, and inorganic fibers such as silicon carbide and silicon nitride.
  • these fibers may be surface-treated.
  • the surface treatment includes a treatment with a coupling agent, a treatment with a sizing agent, a treatment with a binding agent, a treatment with an additive, and the like, in addition to a treatment with a metal as a conductor.
  • one type of these reinforcing fibers may be used alone, or two or more types may be used in combination.
  • PAN-based, pitch-based, rayon-based and other carbon fibers having excellent specific strength and specific rigidity are preferably used from the viewpoint of weight reduction effect.
  • PAN-based carbon fibers having excellent mechanical properties such as strength and elastic modulus can be more preferably used.
  • reinforcing fibers discontinuous fibers may be used, or continuous fibers may be used. It is preferable that the reinforcing fibers are arranged in two or more directions and strengthened, and more preferably, the in-plane shear elastic modulus of the reinforcing member is 3000 MPa or more.
  • the reinforcing effect is further improved.
  • the reinforcing effect is further improved.
  • the present invention can be effectively used as a wheelchair running aid used for a slope used for wheelchair running by hanging over a step generated between objects.

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  • Architecture (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Civil Engineering (AREA)
  • Veterinary Medicine (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Handcart (AREA)
  • Road Paving Structures (AREA)
PCT/JP2021/022379 2020-06-24 2021-06-11 車椅子用走行補助具 Ceased WO2021261300A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2021542169A JP7606968B2 (ja) 2020-06-24 2021-06-11 車椅子用走行補助具
US18/010,837 US20230235565A1 (en) 2020-06-24 2021-06-11 Traveling assistance tool for wheelchair
CN202180024235.2A CN115361929A (zh) 2020-06-24 2021-06-11 轮椅用行走辅助器具
EP21828923.9A EP4173923A4 (en) 2020-06-24 2021-06-11 Traveling assistance tool for wheelchair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020108883 2020-06-24
JP2020-108883 2020-06-24

Publications (1)

Publication Number Publication Date
WO2021261300A1 true WO2021261300A1 (ja) 2021-12-30

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PCT/JP2021/022379 Ceased WO2021261300A1 (ja) 2020-06-24 2021-06-11 車椅子用走行補助具

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US (1) US20230235565A1 (https=)
EP (1) EP4173923A4 (https=)
JP (1) JP7606968B2 (https=)
CN (1) CN115361929A (https=)
WO (1) WO2021261300A1 (https=)

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WO2021261299A1 (ja) * 2020-06-24 2021-12-30 住友ゴム工業株式会社 スロープ
US12415690B2 (en) 2020-07-16 2025-09-16 Motis, Llc Trussed ramp
US12162703B2 (en) * 2020-07-16 2024-12-10 Motis, Llc Combination ramp and load levelers
US12601181B1 (en) 2025-06-24 2026-04-14 Katheryn Johnson Portable accessible ramp system

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Also Published As

Publication number Publication date
EP4173923A1 (en) 2023-05-03
EP4173923A4 (en) 2024-06-05
JP7606968B2 (ja) 2024-12-26
JPWO2021261300A1 (https=) 2021-12-30
US20230235565A1 (en) 2023-07-27
CN115361929A (zh) 2022-11-18

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