WO2019049401A1 - 介護用椅子 - Google Patents

介護用椅子 Download PDF

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Publication number
WO2019049401A1
WO2019049401A1 PCT/JP2018/009602 JP2018009602W WO2019049401A1 WO 2019049401 A1 WO2019049401 A1 WO 2019049401A1 JP 2018009602 W JP2018009602 W JP 2018009602W WO 2019049401 A1 WO2019049401 A1 WO 2019049401A1
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WO
WIPO (PCT)
Prior art keywords
frame
seat
pivot point
main body
armrest
Prior art date
Application number
PCT/JP2018/009602
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
悦子 土橋
慎也 菅原
Original Assignee
株式会社土橋製作所
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 株式会社土橋製作所 filed Critical 株式会社土橋製作所
Priority to CN201880024893.XA priority Critical patent/CN110536669B/zh
Priority to KR1020197033794A priority patent/KR102401426B1/ko
Publication of WO2019049401A1 publication Critical patent/WO2019049401A1/ja

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    • 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
    • A61G5/104—Devices for lifting or tilting the whole wheelchair
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • 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
    • 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
    • A61G5/1051—Arrangements for steering
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
    • 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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • 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
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/34—Specific positions of the patient sitting

Definitions

  • the present invention relates to a chair for nursing care, and more particularly to a chair which can be inclined at an appropriate angle and can be easily transferred between a chair and a bed during reclining.
  • the most universally required functions of the nursing chair are the reclining function to incline the backrest and the function to allow the seat passenger to easily transfer between the chair and the bed.
  • the reclining function of wheelchairs and other chairs does not incline the seating surface, but only reclining the backrest, and tilting the backrest while maintaining the angle between the seating surface and the backrest There is.
  • Patent Documents 1, 2, and 3 various means have been proposed for preventing backrest during reclining (for example, Patent Documents 1, 2, and 3).
  • Patent Document 1 discloses “a wheelchair having a function of integrally rotating the back and the seat and a function of changing the inclination angle of the back with respect to the seat”.
  • a mechanism and an actuator for achieving each of two independent functions are required separately, and the structure of the lower part of the wheelchair becomes complicated and expensive, and the weight of the wheelchair becomes large. Not desirable.
  • the link mechanism of Patent Document 3 can not have a large stroke for sinking the rear of the seat downward. Therefore, it is thought that it is difficult to completely solve the problem that the buttocks slide forward and cause back displacement if the inclination angle of reclining is increased. Therefore, the chair device of Patent Document 3 is provided with means for selectively switching between a reclining position where the relative inclination angle between the back surface and the seat surface can be changed and a tilt position where the inclination angle is fixed at a predetermined angle. .
  • Patent Document 4 discloses a handrail of a reclining wheelchair capable of opening the side of the wheelchair following reclining of the wheelchair.
  • the lower end portion of the link frame 7 is pivotally connected to the vehicle body frame 2 (first pivot point), and the backrest frame 6 and the waist support frame 5 are pivotally connected.
  • the hip support frame 5 is pivotally connected to the vehicle body frame 2 (a fourth pivot point).
  • the link frame 7 and the backrest frame 6 are pivotally connected (second pivot point).
  • the fourth pivot point is pivotally connected to the vehicle body frame 2 behind the center point in the rear direction of the waist support frame 5 from the front. For this reason, when the backrest frame 6 is turned backward, as seen in FIGS.
  • the care recipient needs to move the bed and chair easily between the bed and the chair because the side of the chair is in close contact with the side of the bed so that the armrest does not get in the way. It is a function to remove or move one of the armrests.
  • Reference 4 discloses a handrail that can open the side of a wheelchair.
  • the armrest disclosed in Patent Document 4 has a perfect parallelogram structure due to the four-bar structure, and the armrest surface and the seat surface must always be parallel. Because of this, when you lower your back, you have to take part of the weight of your arm with your shoulder. Further, as shown in FIG. 7 of Patent Document 4, there is a problem that the armrest greatly protrudes from the backrest, and the protruding portion becomes an obstacle to the caregiver.
  • Patent Document 5 rear wheels of a pair of rotatable casters are disposed behind a main wheel of a wheelchair, and a helper steps on a pedal.
  • a nursing chair is disclosed that allows the wheelchair to move sideways with the main wheels raised.
  • Patent Document 6 discloses an "armrest of a push-down wheelchair".
  • the armrest (elbow rest) has an armrest whose rear end is pivotally attached to the support shaft of the rear frame and has a cutout groove of a predetermined width formed over the entire length of the lower surface, and along the cutout groove
  • a slide member which can slide back and forth in the pipe, and one end of which is pivotally attached to the lower end of the slide member, and the other end is rotated to a predetermined position of the main body frame It is composed of a connecting member that is pivotally mounted. By pushing the connecting member downward, the front of the armrest pipe is bent downward.
  • the structure of the armrest is limited to something quite unique and the back of the armrest pipe remains pivotally attached to the back frame, there is a problem that the entire armrest pipe is not moved. is there.
  • the present invention aims to provide means for solving the following several technical problems.
  • the first problem to be solved by the present invention is that, when reclining, the operation to increase the opening angle between the back surface and the seat surface and the motion to incline the seat surface are interlocked by a mechanical link mechanism, and both actuators are operated by one actuator.
  • the second object of the present invention is to provide a simple armrest support link mechanism capable of inclining the armrest substantially parallel to the seat surface in conjunction with the inclination of the seat surface.
  • the third object of the present invention is to provide an armrest moving mechanism capable of moving the armrest so as not to get in the way of the rider in the armrest having the link mechanism as described above. It is.
  • the present invention is to provide a backrest (back frame) capable of relieving back pain of a strong circular caregiver.
  • a first aspect of the present invention for solving the above problems is a main body frame (1) having a pair of legs at the front and back, a rear frame (4) tiltably supported by the main body frame, and a seat frame ( 5)
  • a nursing chair comprising a spring mechanism (10) for biasing the back frame to tilt, wherein the lower part of the body frame (1) and the lower part of the back frame (4) are connected
  • a second pivot fulcrum (16) pivotally connecting the two parts, the back frame (4) linked to the second pivot fulcrum (16), and the seat surface frame (5)
  • the spring mechanism be a gas spring.
  • the front wheel and the rear wheel be made of casters which are rotatably attached to leg portions of the main body frame.
  • the back frame is configured such that a spine flexion portion of a care recipient does not abut on a component of the back frame.
  • the spring mechanism is biased toward the front of the back frame by the internal pressure of the piston rod pushed into the gas chamber when the back frame is lowered backward, and when the back frame is returned forward, the piston mechanism is It is preferable that the forward tilt of the rear frame is assisted by the repulsive force of the fitted spring. This allows anyone to easily perform the reclining operation.
  • a main body frame (1) having a pair of legs at the front and back, a rear frame (4) and a seat frame (5) supported so as to be tiltable on the main body frame (1).
  • a gas spring (10) for biasing the back frame (4) to tilt, and a pair of connection frames (14) for connecting a lower rear leg lower portion of the main body frame (1) and a lower portion of the back frame (4)
  • a first pivot point (15) for pivotally connecting the body frame (1), the other end of the connection frame (14), and the back frame (4).
  • the armrest frame (6) has a mounting pivot (51) for pivotally mounting one end of the support member (62) and the rear frame (4);
  • the operation of increasing the opening angle between the back surface and the seat surface and the operation of tilting the seat surface are interlocked with a relatively simple structure, and both actuators are performed by one actuator. It has become possible to provide such a link mechanism. According to this link mechanism, the sink stroke at the rear of the seat can be made sufficiently large at the time of reclining. Therefore, even if the inclination angle of reclining becomes large, the backrest is not caused and the comfortable sitting posture is maintained. be able to.
  • the above-mentioned reclining link mechanism can be applied not only to a chair or a wheelchair but also to reclining means of chairs for various uses.
  • this link mechanism it has become possible to provide a simple armrest link mechanism capable of inclining the armrest substantially parallel to the seat surface in conjunction with the inclination of the seat surface at the time of reclining. .
  • this link mechanism it is possible to change the inclination of the armrest to a proper state without any operation by the seat rider when reclining.
  • this armrest link mechanism can be applied not only to a chair or a wheelchair but also to reclining chairs for various uses.
  • an armrest having a link mechanism as described above When sitting on a chair, the armrest is held at a predetermined height, and when raising and lowering it is possible to move the armrest near or below the seating surface with simple operation by the user, and the armrest becomes a chair It has become possible to prevent it from getting in the way of lifting up or down or transferring between the chair and the bed.
  • FIG. 1 is a perspective view showing an appearance of a nursing chair which is an embodiment of the present invention in a state where a backrest is erected.
  • FIG. 2 is a perspective view of this chair in a reclined state.
  • casters are attached to the legs.
  • a wheelchair for nursing care which is an embodiment of the present invention is referred to as a wheelchair.
  • this wheelchair has a body frame 1 with a front wheel 2 and a rear wheel 3 mounted on its legs 1a, a back frame 4, a seat frame 5, an armrest frame 6, an armrest support frame 7, a headrest frame 8, a footrest frame 9, a gas spring 10, a side guard 11, a lock release lever 12, and the like.
  • front is a front direction of a seat passenger
  • back means the back direction of a passenger.
  • the headrest frame 8 supports the head of the seat occupant at the time of reclining, and is attached to the upper portion of the rear frame 4 so as to be extensible.
  • the footrest frame 9 supports the legs at the time of sitting and reclining, and is attached to the upper end of the front end of the main body frame 1 so as to be tiltable.
  • the side guards 11 are for protecting the drive portion at the lower part of the seat and for preventing an accident, and include covers attached to both side surfaces of the main body frame 1.
  • the headrest frame 8, the footrest frame 9, the side guards 11 and the like are similar to those frequently used in conventional wheelchairs, and therefore the details will be omitted.
  • a seat cushion pad 13 is attached to the seat cushion frame 5 and a backrest pad (not shown) is attached to the rear frame 4.
  • the rear frame 4 is configured to be able to maintain a predetermined strength without arranging a frame component at the central portion thereof. This is because of the back pain relief that occurs when the spine flexion part of the care recipient, whose spine is flexed (a strong circular back), abuts on the frame component.
  • the main wheel having a large diameter is not used, and the rear wheel is configured by the same caster as the front wheel. This is because it is assumed that the seater does not plan to travel on his own and travels by the assistant's hand.
  • both the front wheel 2 and the rear wheel 3 are made of castors rotatably attached to the legs of the main body frame 1.
  • the lock lever 12 is for locking the movement of the piston of the gas spring 10 when reclining, and the details will be described later.
  • the main body frame 1 has a structure in which the leg frame 1a and the upper frame 1b are joined, but there is no need to configure in this way, and both may be integrally manufactured.
  • both are considered to be integral and referred to as the main body frame 1.
  • FIG. 3 is a side view showing only the framework of the wheelchair of this embodiment, and FIG. 3 (a) shows an erected state, and FIG. 3 (b) shows a reclining state.
  • connection frame 14 is rotatably supported at a first rotation fulcrum 15 provided at the lower part of the main body frame 1, and the upper end of the connection frame 14 is Is provided with a second pivot point 16.
  • the second pivot point 16 the lower part of the back frame 4 and the tip of the piston rod 37 of the gas spring 10 are rotatably connected to the connecting frame 14 via the horizontal rod 45 (see FIGS. 7 and 8) ).
  • a coil spring 47 is fitted around the outer periphery of the piston rod 37.
  • the piston rod 37 pushes the gas chamber 32, but the internal pressure of the gas chamber 32 biases the back frame 4 to tilt forward. That is, the sudden tilting of the back frame 4 can be alleviated, and the sense of security of the seated passenger can be enhanced. Further, when the back frame 4 is returned to the front, the forward tilt of the back frame 4 is assisted by the repulsive force of the coil spring 47 fitted on the piston rod 37. This allows anyone to easily operate the reclining function.
  • a third pivot point 17 is provided at a predetermined position above the second pivot point 16 of the back frame 4, wherein the rear end of the seat frame 5 is pivotably connected to the back frame 4. It is done.
  • a fourth pivot fulcrum 18 is provided on the mounting hardware 19 at the front end of the seat frame 5, and the seat frame 5 is rotatably supported on the main body frame 1.
  • the pivoting fulcrum and the hinge fulcrum described later are the connection points of the two members, and one of the members is formed with a cylindrical protrusion serving as a support shaft, and the other member is penetrated A hole or an insertion hole is formed, and both say the thing fitted so that rotation is possible, and it does not matter whether it is provided with a spindle in which member.
  • the first pivot point 15 and the fourth pivot point 18 described above are fixed pivot points fixed to the body frame 1, and the second pivot point 16 and the third pivot point 17 are fixed. Not a movable fulcrum.
  • the piston 37 of the gas spring 10 connected to the second pivot fulcrum 16 via the weir 45 incorporates a lock mechanism for restraining the back and forth movement of the gas spring 10.
  • the second rotation fulcrum When the second rotation fulcrum is in motion, the movement in the back and forth and up and down directions is restrained, and the second rotation fulcrum becomes a semi fixed fulcrum. Then, when the lock mechanism is released, the second pivot fulcrum 16 becomes a movable fulcrum which can freely move up and down and back and forth.
  • the back frame 4 described above is supported by the second pivot point 16 and the third pivot point 17, and when the piston rod 37 of the gas spring 10 is locked, the vertical movement of the lower end of the back frame 4 The tilting of the back frame 4 is restricted, and only when the above-mentioned locking mechanism is released, the back frame 4 is allowed to tilt freely.
  • the opening angle ⁇ of the both becomes large when the back frame 4 is inclined, and the third The rear end of the seat frame 5 also descends downward when the pivot 17 is lowered.
  • the front end of the seat frame 5 is fixed by the fourth pivot 18, only the rear of the seat sinks downward.
  • the opening angle of the back and the seat is interlocked with the reclining. It is a feature of the present invention that the operation of increasing the velocity and the operation of sinking the back of the seat surface are performed simultaneously.
  • the back frame 4 is connected to the main body frame 1 via the connection frame 14.
  • the second pivot fulcrum 16 moves forward and descends downward. Therefore, the lower end of the back frame 4 is lowered, and the third pivot point 17 is also lowered accordingly. Therefore, an effect is obtained that the stroke of the downward sinking of the rear end of the seat frame 5 is increased.
  • the back surface frame 4 when the lower part of the back surface frame 4 is directly (rotatably) attached to the main body frame 1, the back surface frame 4 does not fall downward at the time of reclining.
  • the sink stroke of the rear end of the seat surface at the time of reclining is enlarged by connecting the rear frame to the main body using the connecting frame 14.
  • the fourth pivoting point 18 is provided at the front end of the main body frame 1 on the front wheel side, and the pivoting point 18 and the front end of the seat frame 5 are connected by the mounting hardware 19. It is in the place where
  • FIGS. 4 to 6 are views showing the structure of the reclining seat of the wheelchair of the present embodiment only with a frame.
  • the fourth pivot point 18 the sinking depth of the buttocks part and the jumping height of the knee parts are largely different.
  • the rear frame 4 is substantially upright, and the fourth pivot 18 is provided on the rear side of the center point of the seat frame in the front-rear direction.
  • the fourth pivot 18 is provided on the front side of the center point of the seat frame in the front-rear direction. Further, in FIG. 4 (b), the mounting surface frame 5 and the fourth pivot fulcrum 18 are connected by the mounting hardware 19.
  • FIG. 5 is a view showing the difference between the sinking depth of the buttocks of the seat frame 5 and the rise height of the knee when the back frame 5 is lowered slightly backward. Comparing Fig. 5 (a) with Fig. 5 (b), the depression of the buttock portion is larger in Fig. 5 (b) (the fourth pivot point 18 is on the front end side of the seat surface). Bounce height of the part is small.
  • FIG. 6 is a view showing the difference between the sinking depth of the buttocks of the seat frame 5 and the jumping height of the knee when the rear frame 4 is fully reclined.
  • the fourth pivot 18 is provided on the rear side of the center point of the seat frame in the front-rear direction, as shown in FIG. 6A, the knee portion jumps up against the sinking of the buttock portion.
  • the fourth pivot point 18 is provided on the front side of the center point of the seat frame in the front-rear direction, as shown in FIG. There is little.
  • FIG. 6 (b) by connecting the fourth pivot fulcrum 18 and the seat surface with the mounting hardware 18, the collar portion is on the back side by a distance corresponding to the length and rotation angle of the mounting hardware 18.
  • the rider can feel comfortable and comfortable.
  • the fourth pivot point 18 when the fourth pivot point 18 is behind the center point of the seat frame 5 in the front-rear direction, the knee jumps more greatly than the lowering of the buttocks, and the wheelchair becomes unstable. For this reason, the seated passenger feels anxious about backrest and falling of the chair.
  • the fourth pivot point 18 is before the center point of the seat frame 5 in the front-rear direction, and the fourth pivot point 18 and the seat frame 5 have a fixed length.
  • the buttocks When connected with mounting hardware, the buttocks are lowered properly, and the knees bounce less when the buttocks sink. As a result, the rider can obtain a comfortable feeling of comfort when reclining.
  • the fourth pivoting point 18 be installed on the front side as much as possible, but if the fourth pivoting point 18 is provided before the knees, when the back frame 4 is lowered backward, With the fall, the knees also go down, making it difficult to obtain a relaxing effect.
  • the fourth pivot point 18 is provided at a position higher than the seat frame 5, the comfort and relaxation effects are difficult to obtain because it moves in the forward direction while lowering when the back frame 4 is lowered. That is, the fourth pivot point 18 is as forward as possible to the center point of the seat frame 5 in the front-rear direction, and is lower than the seat frame 5 behind the knees of the seat occupant and lower than the seat frame 5 It is preferable to provide the
  • FIG. 7 is an explanatory view of a lock mechanism of the gas spring used in the present embodiment
  • FIG. 7 (a) is a side view
  • FIG. 7 (b) is a cross-sectional view of a cylinder portion.
  • a free piston 31 that moves back and forth with fluid pressure divides it into a gas chamber 32 at the back and an oil chamber 33 at the front.
  • the oil chamber 33 is divided into a first oil chamber 33 a and a second oil chamber 33 b by the piston head 34 sliding in the oil chamber 33 back and forth.
  • a cylindrical piston rod 37 for driving the piston head 34 is disposed at the center of the cylinder 30, and a push rod 38 is slidably inserted inside the piston rod 37.
  • the rear end of the push rod 38 has a function of opening the one-way valve 36, and the front end is an unlocking pin 39.
  • a seal member 40 is disposed near the front end of the second oil chamber 33b to prevent oil from flowing out.
  • a coil spring 47 is externally fitted around the outer periphery of the piston rod 37 in a state where the end thereof is fixed to the end of the cylinder 30 or the like. The coil spring 47 expands and contracts in accordance with the expansion and contraction of the piston rod 37 to assist the tilting of the rear frame 4 to the front.
  • the wire 43 is inserted into the protective tube 44 and connected to the lock release lever 12.
  • the lock release lever 12 is attached to the lower portion of one side of the side guard 11, and is configured to be able to release the lock by the operation of a wheelchair attendant.
  • FIG. 8 is a perspective view showing the attachment structure of the tip of the piston rod of the gas spring in the present embodiment.
  • a piston rod 37 projects from the center of the cylinder 30 of the gas spring.
  • An unlocking blanket 42 is disposed in contact with the end of the piston rod 37.
  • the unlocking bracket 42 is provided to pull the unlocking pin 39 by pulling the wire 43 and unlock the piston rod 37 as shown in FIG. 7A.
  • a pair of lateral weirs 45 are mounted orthogonal to the piston rod 37.
  • the front ends of the left and right lateral ridges 45 have a cylindrical shaft, and the through holes of the back frame 4 and the through holes 46 of the connecting frame 14 are rotatably fitted to the shafts on both sides, A second pivot point 16 is formed.
  • the upper portions of the vertical frames on the left and right sides of the rear frame 4 are constrained by the horizontal frames and are inclined in conjunction with each other. Can be controlled. That is, by adopting the structure as shown in FIG. 8, it can be seen that the tip of the piston rod 37 is pivotally connected to the left and right second pivots 16 via the transverse rod 45.
  • FIG. 9 is a view showing the relationship between the operation force required for returning the back frame 4 and the reaction force of the coil spring 47 and the gas spring 10.
  • the horizontal axis is the angle of the back frame 4 (reclining angle), and the vertical axis is the operation force required to return the back frame 4 that is lowered backward. If there is no repulsive force of the coil spring 47, an operating force of about 600 N is required to return from the full reclining state to the initial state. On the other hand, when the repulsive force of the coil spring 47 is used, the maximum value is about 180 N, and anyone can easily return the back frame 4 to the initial state.
  • FIG. 10 is a side view showing a framework of an armrest in the wheelchair of the present embodiment, and FIG. 10 (a) shows an erected state, and FIG. 10 (b) shows a reclining state.
  • This armrest comprises an armrest frame 6 and an armrest support frame 7.
  • the armrest frame 6 is rotatably supported at a rear end (end on the rear side in the traveling direction) at a mounting pivot fulcrum 51 (A) provided on the back frame 4. Further, the front end of the armrest frame 6 is rotatably supported by a connecting pivot fulcrum 52 (B) provided at the upper end of the armrest support frame 7.
  • the armrest support frame 7 is configured to be foldable by a hinge joint provided near the longitudinal center or below thereof, and the lower end of the armrest support frame 7 is rotatably supported near the front end of the seat surface frame 5 ing.
  • the armrest support frame 7 is divided into an upper long piece 54 and a lower short piece 55, both of which are foldably connected by a hinge fulcrum 53 (C).
  • the lower end of the short strip 55 is rotatably supported at a fourth pivot fulcrum 18 provided at the lower part of the mounting hardware 19 near the front end of the seat frame 5.
  • the short strip 55 is held so as not to rotate almost at a fixed angle with respect to the horizontal, and only the long strip 54 is hinged at the hinge fulcrum 53 (C). Rotate and tilt.
  • a quadrilateral link mechanism is formed as a node.
  • the present invention is characterized in that each of the two opposing sides (piece AB and piece CD and piece AD and piece BC) of the quadrilateral having the four nodes of the above-mentioned link mechanism as apexes have substantially the same length.
  • the parallelogram principle an effect is obtained that the seat surface frame 5 and the armrest frame 6 become approximately parallel regardless of how the angle of reclining (the opening angle of the segment AB and the segment AD) changes. . That is, at the time of reclining, the inclination of the armrest can be changed to a proper state without any operation by the seat rider. This is the second essential point of the present invention.
  • the third characteristic configuration of the present invention relates to a moving mechanism of the armrest which changes the position of the armrest so as not to be in the way of getting in or out of the wheelchair user.
  • the armrest frame 6 and the armrest support frame 7 are each divided into two parts so as to be bendably joined by a hinge joint, and both attachment points are made rotatable.
  • the moving mechanism will be described below.
  • FIG. 11 is a perspective view showing the structure of an armrest frame in the present embodiment, and FIG. 11 (a) shows an extended state and FIG. 11 (b) shows a bent state.
  • the armrest frame 6 is composed of a main body arm 61 and a support member 62.
  • a hinge fulcrum 63 is provided near the longitudinal center of the main body arm 61, and a lock pin 64 and a through hole (not shown) for inserting the lock pin 64 are provided at the rear end. Further, the front end is connected to the armrest support frame 7.
  • one end (rear end) of the support member 62 is rotatably fixed by a mounting pivot fulcrum 51 provided on the back frame 4, and the other end (front end) is hinge fulcrum 63, The main body arm 61 is rotatably connected.
  • the lock pin 64 is inserted into an insertion hole (not shown) provided near the base of the support member 62, and the main body arm 61 and the support member 62.
  • the entire armrest frame 6 is held at a predetermined height in a parallel state.
  • the lock pin 64 is removed, and the front end side of the support member 62 is bent downward 90 ° about the mounting pivot 51 as an axis.
  • the rear end of the main body arm 61 is lowered to near the height of the seat frame.
  • FIG. 12 is a perspective view showing the structure of the armrest supporting frame in the present embodiment, and FIG. 12 (a) shows an extended state and FIG. 12 (b) shows a bent state.
  • the armrest supporting frame 7 is composed of a long piece 54 and a short piece 55, and both are bendably joined at a hinge fulcrum 53.
  • the upper end of the long piece 54 is rotatably supported at the connection pivot point 52 of the front end of the main body arm 61 of the armrest frame 6, and the lower end of the short piece 55 is a fourth rotation of the upper portion of the main body frame 1. It is rotatably supported at a fulcrum. As shown in FIG. 12 (b), when the hinge joint is bent, the front end of the main body arm 61 is lowered to the vicinity of the main body frame 1.
  • the opening angle between the long piece 54 and the short piece 55 is limited so as not to be about 120 ° or more, but the long piece 54 and the short piece 55 are The configuration may be linear (180 ° opening angle).
  • FIG. 13 is a perspective view showing the attachment state of the armrest in this embodiment
  • FIG. 13 (a) shows a state before movement of the armrest
  • FIG. 13 (b) shows a state after movement.
  • FIG. 13A in the state before movement of the armrest (normal seat riding), the rear end of the main body arm 61 is fixed near the back frame by the lock pin 64, and the support member 62 is forward It is in a state of being overhanged.
  • the hinge fulcrum 53 is extended at the front end of the main body arm 61 and is supported by the upright armrest support frame 7.
  • the main body arm 61 is held substantially horizontally at a predetermined height around the elbow of the seat occupant.
  • the lock mechanism need not be limited to this method.
  • the insertion hole of the lock pin is provided in the vicinity of the root of the support member 62, this may be provided on the side surface of the back frame 4.
  • the reclining support mechanism, the armrest support mechanism, and the armrest moving mechanism of the present invention can be widely applied not only to wheelchairs but also to reclining chairs for various uses.
  • FIG. 6 is a view showing a relationship between an operation force required to return the back frame 4 and reaction forces of the coil spring 47 and the gas spring 10; It is a side view showing a framework of an armrest in a wheelchair of this example. It is a perspective view which shows the structure of an armrest frame in a present Example. It is a perspective view which shows the structure of an armrest support frame in a present Example. It is a perspective view which shows the attachment condition of an armrest in a present Example.
  • Body frame 1a Leg frame 1b: Upper frame 2: Front wheel 3: Rear wheel 4: Rear frame 5 seat frame 6: Armrest frame 7: Arm support frame 8: Headrest frame , 9: Footrest frame, 10: Gas spring, 11: Side guard, 12: Lock release lever, 13: Seat surface pad, 14: Coupling frame, 15: First pivot point, 16: Second pivot point , 17: third pivot point, 18: fourth pivot point, 19: mounting hardware 30: cylinder, 31: free piston, 32: gas chamber, 33: oil chamber, 33a: first oil chamber, 33b : Second oil chamber, 34: Piston head, 35: Oil flow path, 36: One-way valve, 37: Piston rod, 38: Push rod, 39: Lock release pin, 40: Sealant, 41: Support shaft, 42: Lock release bracket, 43: Wire, 44: Protective tube, 45: Horizontal, 46: Through hole 51: Mounting rotation fulcrum, 52: Coupling rotation fulcrum, 53: hinge fulcrum, 54: Long piece, 55:

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
PCT/JP2018/009602 2017-09-11 2018-03-13 介護用椅子 WO2019049401A1 (ja)

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CN114469560B (zh) * 2022-01-13 2023-05-09 重庆医科大学附属永川医院 一种高位截瘫病人用护理床

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JP2019047938A (ja) 2019-03-28
KR102401426B1 (ko) 2022-05-23
KR20200045988A (ko) 2020-05-06
CN110536669A (zh) 2019-12-03
JP6273397B1 (ja) 2018-01-31

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