JP2007000310A - Folding wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding wheelchair foldable by forming a seat part and a backrest part movably in the front/rear direction and narrowing the interval between right/left body frames. <P>SOLUTION: This folding wheelchair 1 is constituted of a pair of right/left small-diameter auxiliary wheels 4 disposed in front of a pair of right/left side frames 2, a pair of right/left large-diameter main wheels 3 disposed in the back of the pair of right/left side frames 2, a pair of right/left backrest frames 8 having their lower ends connected and pivoted onto the side frames 2 between the small-diameter auxiliary wheels 4 and the large-diameter main wheels 3, a locking means locking rearward tilt of a backrest part 6, a pair of right/left seat part frames having their base ends connected and pivoted to the middle part of the backrest frame 8 and approximately horizontally moving in the front/back while being engaged with the side frame 2 from the base end toward the tip, and a seat part 5 having a seat member with flexibility stretched between the seat part frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a folding wheelchair. Specifically, an object of the present invention is to provide a folding wheelchair in which a seat portion can move forward.

  Conventionally, in a folding wheelchair, for example, as shown in FIG. 8, left and right main body frames 101, main wheels 102 and auxiliary wheels 103 attached to the left and right main body frames 101, and left and right main body frames 101 are connected to each other. The X-link type folding frame 104 is connected so that the interval is freely adjustable. The seat body 105 and the backrest 106 are made of a flexible material such as cloth, so that the left and right body frames 101 can be connected to each other. It is a structure that can be folded with a narrow interval (see Patent Document 1).

Japanese Patent Laying-Open No. 2005-118144 (Detailed Description of the Invention, FIG. 1)

  However, since the seat and the main body frame are integrated, when moving from a wheelchair to a bed or car, it is necessary to stand up from the position of sitting on the seat, and in the case of elderly people and disabled persons, they stand up on their own In addition to being difficult, even when standing up while holding the attendant, there is a problem that places a heavy burden on the attendant.

  In addition, since the backrest is substantially at the same position as the axis of the main wheel, when the backrest is tilted backward, the center of gravity shifts to the main wheel side and the wheelchair becomes very unstable.

  The present invention was devised in view of the above points, and is a foldable wheelchair in which a seat portion and a backrest are movable in the front-rear direction and can be folded by narrowing between the left and right body frames. Is intended to provide.

  In order to achieve the above object, a foldable wheelchair according to the present invention is disposed at a pair of left and right small-diameter auxiliary wheels disposed at a front portion of a pair of left and right side frames and at a rear portion of the pair of left and right side frames. A pair of left and right large-diameter main wheels, a pair of left and right back frames whose lower ends are connected and supported on a side frame between the small-diameter auxiliary wheel and the large-diameter main wheel, and two links between the back frames A main link connecting the ridges in an X-shape, a backrest portion on which a flexible backrest member is stretched between the backrest frames, and a locking means for locking the tilting of the backrest portion to the rear. A pair of left and right seats whose base ends are connected and supported in the middle of the back frame and are moved back and forth substantially horizontally while engaging the side frames from the base end toward the tip. Comprising a frame, a seat which the seat member is stretched flexible between the seat frame, between the front of the right and left pair of side frames, a connecting rod in which the intermediate portion is bendable only upward.

  Here, folding is possible by providing a main link in which two link rods are connected in an X shape between the backrest frames. Moreover, the seat part can be moved forward by pushing the backrest forward, which makes it easier for elderly and disabled people to sit down.

  Furthermore, by tilting the backrest portion backward, the seat portion moves backward, and stable seating becomes possible.

  As described above, according to the present invention, although the foldable wheelchair is used, the pivot of the backrest is located between the main wheel and the auxiliary wheel so that the elderly or the disabled can stand up from the wheelchair. Can stand up without tilting backwards.

  In addition, when the back is tilted forward and the seat slides forward, it helps the elderly and disabled people get up from the wheelchair, reducing the burden on the attendant. It becomes.

Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.
1 is a side view showing an example of a foldable wheelchair to which the present invention is applied, FIG. 2 is a front view in FIG. 1, FIG. 3 is a rear view in FIG. 1, and FIGS. An explanatory view showing an example of a horizontal movement mechanism of a seat is shown.

  The wheelchair 1 shown here is provided with a main wheel (rear wheel) 3 at the rear part of the left and right side frames 2 and an auxiliary wheel (front wheel) 4 at the front part, and a seat part 5 between the left and right side frames 2 and 2. The rear portion of the seat portion 5 includes a backrest portion 6 and a handle bar 7 formed integrally with the backrest portion 6.

  Therefore, the backrest portion 6 includes two backrest frames 8 in which a handle bar 7 is integrally formed at the upper end, and a cloth backrest member 9 stretched between the backrest frames 8. The lower end of the back frame 8 is connected and supported at the position of the side frame 2 on the auxiliary wheel 4 side from the rotating shaft 10 of the main wheel 3. Further, the back frame 8 is provided with a support rod 29 that is fitted in such a manner as to sandwich the upper part of the side frame 2.

  Next, a main link 13 in which two link rods 11 are connected in an X shape with pins 12 is connected and supported between the backrest frames 8. The main link 13 is supported so that the upper end of the link rod 11 is connected to and pivotally supported by the backrest frame 8 and the lower end of the main link 13 can be moved up and down by the backrest frame 8. Further, a band 21 for supporting a constant distance between the backrest frames 8 is provided below the backrest frames 8 and 8. Further, mooring rods 14 for preventing the back frame 8 from tilting backward are protruded inward in the vicinity of the rear upper end of the side frame 2.

  The seat portion 5 is composed of two seat portion frames 15 and a cloth seat member 9 </ b> A stretched between the seat portion frames 15. The base end of the seat frame 15 is pivotally connected to the back frame 8 and the seat frame 15 is horizontally supported by being fitted into a support groove 16 provided inside the side frame 2. However, it is possible to slide forward.

  Further, between the front ends of the side frames 2 and 2, a connecting rod 17 that can be bent upward from its substantially center is connected and supported. In this connecting rod 17, the base ends of the two casings 18 and 18 are connected and pivotally supported by the side frames 2 and 2 by a joint portion 19 that is rotatable in the vertical direction, and the distal ends of the casings 18 and 18 overlap each other. It is set as the structure connected and supported by the pivot pin 20 in the state.

  As a result, the connecting rod 17 can be bent upward from the horizontal shape, and the wheelchair 1 can be folded in the left-right direction by narrowing the interval between the backrest frames 8 and 8 by the action of the main link 13 and the connecting rod 17. Is possible.

  The main wheel 3 is attached to the side frames 2 and 2 so that the main wheel 3 can travel only in the front-rear direction. Further, the wheel 23 is provided with a rim 30 for manually rotating the main wheel 3. A brake (not shown) is attached to the main wheel 3, and this brake is operated by a brake lever 24 provided on a handle rod 7 formed integrally with the backrest 6.

  The auxiliary wheel 4 is a mechanism that can be rotated in the left-right and front-rear directions by a caster 25. Therefore, the direction of the auxiliary wheel 4 can be changed by changing the direction of the wheelchair 1 in the left-right direction by the handle bar 7 at the upper end of the backrest 6.

  Next, as shown in FIGS. 5A and 5B, a footrest portion 26 is provided at the lower portion of the connecting rod 17. The footrest 26 is configured so that it can be inserted and removed from the ends of the side frames 2 and 2 by fitting both ends of the footrest 26 to guide rails 27 disposed on the inner side surfaces of the side frames 2 and 2. The

  Therefore, the footrest portion 26 is divided into two parts like the connecting rod 17, and the distal ends thereof are connected and supported by the pivot pin 20 in a state of overlapping each other. Thereby, the footrest portion 26 can be bent upward from the horizontal shape.

  As shown in FIGS. 6 and 7, the foldable wheelchair according to the present invention having the above-described configuration accommodates the footrest portion 26 between the side frames 2 and 2 when an elderly person or the like sits down, and the backrest frame 8. Is pushed forward, and the seat 5 moves horizontally to the side frames 2 and 2 front end side.

  Then, the elderly person A can sit in a state where the elderly person A is seated on the cloth back member 9 stretched between the seat frames 8 by pulling the seat frame 8 to the near side while sitting on the seat 5. It becomes.

  Further, the upper ends of the side frames 2 and 2 are utilized as the elbow pads 28, and the footrest 26 is pulled out forward of the side frames 2 and 2 to place the feet. In this state, the backrest frame 8 is locked to the side frames 2 and 2 by appropriate means, and the wheelchair 1 is moved while holding the handle bar 7.

  Next, when the elderly person A gets off the wheelchair 1, the footrest 26 is pushed between the side frames 2 and 2 and stored. Then, the seat frame 5 connected to the back frame 8 is released from the side frame 2 by releasing the lock between the back frame 8 and the side frames 2 and 2 and pushing the back frame 8 forward with the connecting pivot portion as a fulcrum. It is pushed forward by the seat frame 15 fitted into the support groove 16 provided inside.

  Accordingly, the elderly person A can easily get off the wheelchair 1 by standing up with his feet lowered on the ground. Moreover, even if it is a case where it cannot stand up by itself, it becomes possible to get off in a state where the caregiver is not burdened.

  When the wheelchair 1 is folded, the connecting rod 17 and the footrest 26 are bent upward from the pivot pin 20 and the main link 13 connected and supported in an X shape between the backrest frames 8 is reduced. Thus, the wheelchair 1 can be folded in the left-right direction by narrowing the interval between the backrest frames 8 while the lower ends of the left and right backrest frames 8 move downward.

  In this embodiment, it is desirable that each member such as the back frame, the seat frame, and the side frame is made of light metal such as duralumin, aluminum, or stainless steel that is light and strong, but is not necessarily made of light metal. There is no necessity, and it may be formed of, for example, hard plastic or wood as long as it is lightweight and has high resistance.

  As described above, the folding wheelchair according to the present invention can easily sit down and can quickly sit down when the sick person is seated because the seat portion can be moved forward. Moreover, if the waist is settled, if the seat part is moved back as it is, a movement of a wheelchair can be started. Therefore, by moving the seat portion forward from the seated state, it is possible to easily move from the wheelchair to the bed and other operations and to reduce the burden on the caregiver.

It is a side view showing an example of a folding wheelchair to which the present invention is applied. It is front explanatory drawing in FIG. It is a back surface explanatory drawing in FIG. It is explanatory drawing which shows an example of the horizontal movement mechanism of the seat part of the folding type wheelchair to which this invention is applied. It is explanatory drawing which shows an example of the mechanism of the footrest part of the folding type wheelchair to which this invention is applied. It is explanatory drawing which shows the use condition of the folding-type wheelchair to which this invention is applied. It is explanatory drawing which shows the state of folding of the folding-type wheelchair to which this invention is applied. It is explanatory drawing which shows an example of the conventional folding type wheelchair.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Side frame 3 Main wheel 4 Auxiliary wheel 5 Seat part 6 Backrest part 7 Handle rod 8 Backrest frame 9 Backrest member 9A Seat member 10 Rotating shaft 11 Link rod 12 Pin 13 Main link 14 Mooring rod 15 Seat frame 16 Support groove part 17 connecting rod 18 housing 19 joint rod 20 pivot pin 21 belt 22 tire 23 wheel 24 brake lever 25 caster 26 foot rest 27 guide rail 28 elbow rest 29 support rod 30 rim

Claims (3)

A pair of left and right small-diameter auxiliary wheels arranged at the front part of the pair of left and right side frames;
A pair of left and right large-diameter main wheels disposed at the rear of the pair of left and right side frames;
A pair of left and right backrest frames whose lower ends are connected and supported on the side frame between the small diameter auxiliary wheel and the large diameter main wheel,
A main link in which two link rods are connected in an X shape between the backrest frames, and a backrest portion on which a flexible backrest member is stretched between the backrest frames;
Locking means for locking the tilting of the backrest to the rear;
A pair of left and right seat frames that are pivotally connected to the middle of the backrest frame and moved back and forth substantially horizontally while engaging the side frame from the base end toward the tip. ,
A seat on which a seat member having flexibility is stretched between the seat frames;
A foldable wheelchair is provided between the front portions of the pair of left and right side frames, and a connecting rod whose middle portion can be bent only upward. A footrest portion is provided between the front portions of the pair of left and right side frames so as to be able to be inserted and removed forward from between the side frames, and a midway portion thereof can be bent only upward. The foldable wheelchair according to 1. The foldable wheelchair according to claim 1, wherein an elbow rest is formed at an upper end of the side frame.

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