JP4665090B2 - Folding wheelchair - Google Patents

Description

  The present invention relates to a folding wheelchair.

  Patent Document 1 discloses a conventional folding wheelchair. The wheelchair includes a right frame provided with a right front wheel and a right rear wheel, and a left frame provided with a left front wheel and a left rear wheel. Between the right frame body and the left frame body, a folding mechanism that allows the right frame body and the left frame body to be unfolded and folded, and an occupant to be seated with the right frame body and the left frame body deployed. Seating means.

  This folding mechanism of a wheelchair has an X-type link mechanism that connects a right frame body and a left frame body. The seating means has a rigid seat portion with locking blocks fixed to the left and right sides. Moreover, the receiving part which fits the collar part of the latching block provided in this seat part is provided inside each of the right frame body and the left frame body.

  In the conventional foldable wheelchair having such a configuration, the right frame body and the left frame body are moved by moving the seat portion from above and fitting the collar portion of the locking block provided on the seat portion to the receiving portion. And can be held in an expanded state. Further, the right frame body and the left frame body can be folded by moving the seat portion upward and releasing the fitting between the collar portion and the receiving portion.

JP 2004-223169 A

  However, in the conventional foldable wheelchair, when the right frame body and the left frame body are expanded or folded, the seat portion must be held upward. Further, in order to hold the right frame body and the left frame body in an unfolded state, it is necessary to move the seat portion from above so that the collar portion and the receiving portion are securely fitted, which is troublesome. It was.

  The present invention has been made in view of the above-described conventional situation, and provides a foldable wheelchair that can easily perform unfolding and folding operations and can reliably hold the unfolded state. Is a problem to be solved.

The foldable wheelchair of the present invention includes a right frame provided with a right front wheel and a right rear wheel, a left frame provided with a left front wheel and a left rear wheel located on the left side of the right frame, and the right A folding mechanism provided between the frame body and the left frame body and capable of unfolding and folding the right frame body and the left frame body; and provided between the right frame body and the left frame body. In the folding wheelchair provided with seating means for seating an occupant in a state where the right frame body and the left frame body are deployed,
The right frame body has a right side surface extending in the vertical direction, and the left frame body has a left side surface extending in the vertical direction while facing the right side surface;
The folding mechanism includes a first mechanism provided on the buttock side of the occupant and a second mechanism provided on the back side of the occupant,
The first mechanism and the second mechanism have a right plate and a left plate having a first end surface and a second end surface that have a thickness and are back from each other;
A right hinge connecting the right side and the corner of the first end surface of the right plate on the occupant side, and fixing the right plate to the right side so as to be swingable;
A left hinge for connecting the left side surface and the corner of the first end surface of the left plate on the occupant side, and for swingably fixing the left plate to the left side surface;
Connecting the corner portions of the side opposite to the occupant side of the second end surface of the right plate and left plates, Ri Do and a hinge in fixing the said right plate and left plates can swing each other ,
A flexible right belt is stretched between the right plate of the first mechanism and the right plate of the second mechanism, and the left plate of the first mechanism and the left of the second mechanism left belt with a flexible characterized that you have been stretched between the plates.

  In the foldable wheelchair of the present invention having such a configuration, the right and left plates are folded in such a manner that the connecting portion between the right and left plates connected by the middle hinges is folded toward the occupant side, thereby interlocking with it. Thus, the interval between the right frame and the left frame is reduced, and the right frame and the left frame can be folded.

  Further, by widening the interval between the right frame and the left frame, the right side plate and the left side plate are interlocked with each other so that the right side surface and the first end surface of the right side plate face each other, and the left side surface and the first end surface of the left side plate. And the second end surfaces of the right and left plates face each other and expand until they come into contact with each other, and the right frame body and the left frame body are expanded. And an occupant can be seated.

  When the occupant sits on the seating means, a force that bends the connecting portion connecting the right and left plates with the middle hinge to the side opposite to the occupant side acts on the right and left plates. At this time, the right plate and the left plate have thickness, and the middle hinge connects the corners on the opposite side to the occupant side, so the connecting part of the right plate and the left plate is on the opposite side to the occupant side. It is surely prevented from bending. For this reason, even if a passenger | crew sits on a seating means, the state by which the right frame body and the left frame body were expand | deployed can be hold | maintained.

  Therefore, the folding wheelchair according to the present invention can easily perform the unfolding and folding operations and can reliably hold the unfolded state.

The foldable wheelchair of the present invention includes a first mechanism that is a folding mechanism provided on the occupant's buttocks side and a second mechanism that is a folding mechanism provided on the back side of the occupant .

As described above, by providing the folding mechanism at two positions on the buttocks side and the back side, the right frame body and the left frame body can be narrowed or widened while maintaining a parallel state. For this reason, the expansion | deployment and folding operation | work with a right frame body and a left frame body can be performed smoothly.

In addition, a flexible right belt is stretched between the right plate of the first mechanism and the right plate of the second mechanism, and between the left plate of the first mechanism and the left plate of the second mechanism. A flexible left belt is stretched .

For this reason , by pulling the middle part of the right belt and the left belt obliquely upward simultaneously, the connecting part of the right plate and the left plate of the first mechanism bends to the passenger side, and the connecting part of the right plate and the left plate of the second mechanism Also bend to the passenger side. If it does in this way, the space | interval of a right frame body and a left frame body will narrow in connection, and a right frame body and a left frame body can be folded easily.

  Further, in a state where the right frame body and the left frame body are deployed, the right belt and the left belt are also used as a backrest below the second mechanism, so that it is easy to sit down.

  In the foldable wheelchair of the present invention, the seating means is preferably a flexible seating belt stretched between the right frame body and the left frame body. In this case, since the seating belt bends in accordance with the body shape of the occupant, the seating comfort is good and it is possible to sit for a long time.

  Moreover, it is preferable that the position where the seating belt is stretched between the right frame body and the left frame body can be changed. In this case, the height of the seating surface can be changed according to the occupant's body shape, so that the usability can be improved.

  In the folding wheelchair of the present invention, it is preferable that all the constituent members are made of a nonmagnetic material. In this case, it is suitable for use in MRI (Magnetic Resonance Imaging) inspection.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the folding wheelchair 1 of the embodiment is located on the left side of the right frame 10 with the right front wheel 11 and the right rear wheel 12 and the left front wheel 21 and the left rear wheel. And a left frame 20 provided with a ring 22. Between the right frame body 10 and the left frame body 20, folding mechanisms 100 and 200 that allow the right frame body 10 and the left frame body 20 to be unfolded and folded are provided. In addition, seating means 80 and 85 are provided between the right frame body 10 and the left frame body 20 for seating an occupant with the right frame body 10 and the left frame body 20 deployed.

  The left and right front wheels 11 and 21 and the left and right rear wheels 12 and 22 are made of wood, and their outer peripheral portions are covered with elastic rubber. The left and right front wheels 11 and 21 are connected to the left and right frame bodies 10 and 20 by connecting members 11r and 21r made of hard resin. The left and right rear wheels 12, 22 are connected to the left and right frame bodies 10, 20 by bearing members made of hard resin.

  The right frame 10 is provided on the right side plate 13, the right grip plate 14 provided on the rear end side of the right side plate 13, the right curtain plate 15 provided on the lower end side of the right side plate 13, and the upper end side of the right side plate 13. The right armrest plate 16 and the right curtain plate 15 have a right footrest plate 17 extending forward from the outer surface. A right grip plate 14 g extending rearward is attached to the upper rear surface of the right grip plate 14. As shown in FIG. 2, a footrest 17 d fixed by a hinge 17 t is attached to the front end portion of the right footrest plate 17. The footrest 17d can swing between a horizontally extending state and a vertically extending state. The constituent members of the right frame 10 are all wooden except for the hinge 17t made of SUS304.

  As shown in FIG. 1, the left frame 20 includes a left side plate 23, a left grip plate 24 provided on the rear end side of the left side plate 23, a left curtain plate 25 provided on the lower end side of the left side plate 23, and a left side plate. The left armrest plate 26 provided on the upper end side of the left armrest plate 26 and the left footrest plate 27 extending forward from the outer surface of the left curtain plate 25 are provided. A left grip 24 g extending rearward is attached to the upper rear surface of the left grip plate 24. As shown in FIG. 2, a footrest 27 d fixed by a hinge (not shown) is attached to the front end portion of the left footrest plate 27. The footrest 27d can also swing between a horizontally extended state and a vertically extended state. The constituent members of the left frame 20 are all wooden except for the hinge made of SUS304.

  The folding mechanisms 100 and 200 are provided on the occupant's buttocks side and the occupant's back side. For this reason, the right frame body 10 and the left frame body 20 can be narrowed or widened while maintaining a parallel state, so that the expansion and folding operations of the right frame body 10 and the left frame body 20 can be performed smoothly. Can be done.

  As shown in FIG. 3, the first mechanism 100 that is a folding mechanism provided on the occupant's buttocks side includes a right plate 30 and a left plate 40 having a thickness. The right plate 30 has a first end surface 31 and a second end surface 32 that are back to each other. The left plate 40 has a first end surface 41 and a second end surface 42 that are back to each other.

  The right side surface 13 a of the right side plate 13 and the corner portion on the passenger side of the first end surface 31 of the right plate 30 are connected by a right hinge 110. The right plate 30 can swing between a horizontally extended state and a vertically extended state. When the right plate 30 is positioned in a horizontal state, the right support member 18 that supports the lower surface of the right plate 30 on the right side surface 13a side is provided on the right side surface 13a.

  The left side surface 23 a of the left side plate 23 and the corner portion on the passenger side of the first end surface 41 of the left plate 40 are connected by a left hinge 120. The left plate 40 can swing between a horizontally extending state and a vertically extending state. When the left plate 40 is positioned in a horizontal state, the left support member 28 that supports the lower surface of the left plate 40 on the left side surface 23a side is provided on the left side surface 23a.

  The corners on the opposite side of the occupant side of the second end faces 32, 42 of the right plate 30 and the left plate 40 are connected by an intermediate hinge 130. The constituent members of the first mechanism 100 are all wooden except for the right hinge 110, the left hinge 120, and the middle hinge 130 made of SUS304.

  The right plate 30 and the left plate 40 can be folded by folding the connecting portion connected by the middle hinge 130 to the occupant side (upper side). When the right plate 30 and the left plate 40 are folded, the distance between the right frame body 10 and the left frame body 20 is reduced in conjunction with the right plate 30 and the left plate 40.

  Moreover, as shown in FIG. 4, the 2nd mechanism 200 which is a folding mechanism provided in the passenger | crew's back side has the right board 50 and the left board 60 which have thickness. The right plate 50 has a first end surface 51 and a second end surface 52 that are back to each other. The left plate 60 has a first end surface 61 and a second end surface 62 that are back to each other.

  The right side surface 14 a of the right grip plate 14 and the occupant side corner of the first end surface 51 of the right plate 50 are connected by a right hinge 140. The right plate 50 can swing between a state extending in the left-right direction and a state extending in the front-rear direction. The left side surface 24 a of the left grip plate 24 and the corner portion on the passenger side of the first end surface 61 of the left plate 60 are connected by a left hinge 150. The left plate 60 can swing between a state extending in the left-right direction and a state extending in the front-rear direction.

  The corners on the opposite side of the occupant side of the second end faces 52 and 62 of the right plate 50 and the left plate 60 are connected by an intermediate hinge 160. The constituent members of the second mechanism 200 are all wooden except for the right hinge 140, the left hinge 150, and the middle hinge 160 made of SUS304.

  The right plate 50 and the left plate 60 can be folded by folding the connecting portion connected by the middle hinge 160 to the occupant side (front side). When the right plate 50 and the left plate 60 are folded, the distance between the right frame body 10 and the left frame body 20 is reduced in conjunction with the right plate 50 and the left plate 60.

  As shown in FIG. 3, in the first mechanism 100, slits 33 and 43 extending in the left-right direction are respectively provided at the rear end portion on the connecting portion side of the right plate 30 and the rear end portion on the connecting portion side of the left plate 40. It is penetrating. As shown in FIGS. 1 and 4, slits 53, 63 extending in the left-right direction are also provided at the lower end portion of the second mechanism 200 on the connection portion side of the right plate 50 and the lower end portion of the left plate 60 on the connection portion side. It is penetrated in each.

  As shown in FIG. 3 and FIG. 4, one end of a belt-like flexible right belt 71 is inserted into a slit 33 penetrating the right plate 30, and this slit 53 penetrating the right plate 50 has this right The other end of the belt 71 is inserted. As shown in FIG. 5, a cylindrical portion formed by folding the right belt 71 is formed at both ends of the right belt 71, and cylindrical bodies 73 larger than the slits 33 and 53 are inserted into the cylindrical portion, Both ends of the right belt 71 are prevented from coming off from the slits 33 and 53. Also, flanges 73t are formed at both ends of the cylindrical body, and the flanges 73t are engaged with the opening edges at both ends of the cylindrical portion of the right belt 71 so that the cylindrical body 73 does not fall off the cylindrical portion. ing.

  In addition, one end of a belt-like flexible left belt 72 is inserted into the slit 43 penetrating the left plate 40, and the other end of the left belt 72 is inserted into the slit 63 penetrating the left plate 60. ing. Both end portions of the left belt 72 have the same structure as both end portions of the right belt 71 so that the end portions of the left belt 72 cannot be removed from the slips 43 and 62. Further, the cylindrical body is prevented from falling off from the cylindrical portion of the left belt 72.

  In this manner, the right belt 71 is stretched between the right plate 30 of the first mechanism 100 and the right plate 50 of the second mechanism 200. A left belt 72 is stretched between the left plate 40 of the first mechanism 100 and the left plate 60 of the second mechanism 200. The right belt 71 and the left belt 72 are non-magnetic materials.

By simultaneously pulling the middle portion of the right belt 71 and the left belt 72 obliquely upward, a force is generated in the direction F. For this reason, the connection part of the right board 30 and the left board 40 of the 1st mechanism 100 bends to the passenger | crew side (upper side of the 1st mechanism 100), and the connection part of the right board 50 and the left board 60 of the 2nd mechanism 200 is also a passenger | crew. Bends to the side (front side of the second mechanism 200). Thereby, the space | interval of the right frame body 10 and the left frame body 20 narrows interlockingly, and as shown in FIG. 2, it will be in the state by which the right frame body 10 and the left frame body 20 were folded. For this reason, the right frame body 10 and the left frame body 20 can be folded easily. The right belt 71 and the left belt 72 are also used as a backrest when the right frame body 10 and the left frame body 20 are deployed.

  As shown in FIGS. 1 and 3, the seating means includes three belt-like flexible seating belts 80 stretched between the right side surface 13a and the left side surface 23a, and a hook-and-loop fastener on the upper surface thereof. The seat cushion 85 is detachably mounted. The seat belt 80 and the seat cushion 85 are non-magnetic.

  The right side plate 13 and the left side plate 23 are provided with slits 13s, 13t, 23s, and 23t at equal intervals in two steps in the vertical direction and in three rows in the front-rear direction. Each slit 13s, 13t, 23s, 23t extends in the front-rear direction. In the drawing, one end of the seating belt 80 is inserted into the three slits 13s on the upper side of the right side plate 13, and the other end of the seating belt 80 is inserted into the three slits 23s on the upper side of the opposing left side plate 23, respectively. It is inserted. At both ends of the seating belt 80, a cylindrical portion formed by folding back the seating belt 80 is formed, and a cylindrical body 81 larger than the slits 13s and 23s is inserted into the cylindrical portion and seated from the slits 13s and 23s. The both ends of the belt 80 are prevented from coming off. In addition, flanges are formed at both ends of the cylindrical body 81, and the flanges are engaged with opening edges at both ends of the cylindrical portion formed at both ends of the seating belt 80, so that the cylindrical body 81 is in the cylindrical portion. It is made not to fall off.

  Since each seating belt 80 bends in accordance with the occupant's body shape, it is comfortable to sit on and can sit for a long time. Further, the cylindrical body 81 can be extracted from the cylindrical portion of the seating belt 80, the cylindrical body 81 is extracted from the cylindrical portion, the seating belt 81 is extracted from the upper slits 13s, 23s, and the lower slits 13t, 23t. Can be inserted again. For this reason, a seat surface can be made low easily.

  As shown in FIGS. 1, 2, and 4, on the front surface of the second mechanism 200, two belt-like flexible backrests stretched between the right grip plate 14 and the left grip plate 24. A belt 90 and a back cushion 95 removably attached to the front surface of the belt 90 by a hook-and-loop fastener are provided. The backrest belt 90 and the backrest cushion 95 are non-magnetic materials.

The right grip plate 14 and the left grip plate 24 are provided with two slits 14s and 24s arranged vertically in the upper part. One end of the backrest belt 90 is inserted through the two slits 14s of the right grip plate 14, and the other end of the backrest belt 90 is inserted through the two slits 24s of the left grip plate 24, respectively. A cylindrical portion formed by folding back the backrest belt 90 is formed at both ends of the backrest belt 90. A cylindrical body 91 larger than the slits 14s and 24s is inserted into the cylindrical portion, and the backrest is formed from the slits 14s and 24s. The both ends of the belt 90 are prevented from coming off. Further, both ends of the cylindrical body 91 are formed with flanges, and the flanges are engaged with the opening edges at both ends of the cylindrical portion formed at both ends of the backrest belt 90, so that the cylindrical body 91 is the cylindrical portion. It is made not to fall off.

  As shown in FIGS. 1 and 2, slits 13 u and 23 u that extend obliquely are provided in front lower portions of the right side plate 13 and the left side plate 23. A front belt 95 that passes through the slits 13u and 23u is provided in a ring shape. The front belt 95 prevents the front portion between the right frame body 10 and the left frame body 20 from being opened too much.

  In the folding wheelchair 1 of the embodiment having such a configuration, as shown in FIG. 1, the folding mechanism provided on the buttocks side of the occupant is increased by widening the interval between the right frame body 10 and the left frame body 20. The right plate 30 and the left plate 40 of a certain first mechanism 100 face the right side surface 13a and the first end surface 31 of the right plate 30, the left side surface 23a and the first end surface 41 of the left plate 40 face each other, and the right plate. The second end surfaces 32 and 42 of the 30 and the left plate 40 face each other and expand until they come into contact with each other. Similarly, the right plate 50 and the left plate 60 of the second mechanism 200 that is a folding mechanism provided on the back side of the occupant face the right side surface 14a and the first end surface 51 of the right plate 50, and the left side surface 24a and the left plate. The first end surface 61 of the plate 60 faces and the second end surfaces 52 and 62 of the right plate 50 and the left plate 60 face each other and expand until they come into contact with each other. This state is a state in which the right frame body 10 and the left frame body 20 are unfolded, and an occupant can be seated.

  In addition, when the occupant is seated, the force to bend the connecting portion of the right plates 30, 50 and the left plates 40, 60 of the first mechanism 100 and the second mechanism 200 to the side opposite to the occupant side is the right plate. 30 and 50 and the left plates 40 and 60. At this time, the right plates 30 and 50 and the left plates 40 and 60 have a thickness, and the middle hinges 130 and 160 connect the corners on the opposite side to the occupant side. Reliably prevents it from bending to the other side. For this reason, even if a passenger | crew sits down, it can hold | maintain in the state by which the right frame body 10 and the left frame body 20 were expand | deployed.

  Further, in the state where the right frame body 10 and the left frame body 20 are unfolded, by pulling the middle portion of the right belt 71 and the left belt 72 obliquely upward simultaneously, as shown in FIG. The left frame 20 can be easily folded.

  Therefore, the foldable wheelchair 1 of the embodiment can easily perform the unfolding and folding operations and can reliably hold the unfolded state.

  Moreover, since the folding wheelchair 1 of the embodiment is formed of a non-magnetic component member such as a wooden member, it is suitable for use in an MRI examination.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above embodiments, and can be appropriately modified and applied without departing from the spirit thereof.

  The present invention is applicable to a folding wheelchair for MRI examination.

It is a perspective view which shows the state which the folding-type wheelchair of the Example developed. It is a perspective view which shows the folding state of the folding-type wheelchair of an Example. It is a partial longitudinal cross-sectional view which shows the 1st mechanism of the folding-type wheelchair of an Example. It is a partial cross section figure which shows the 2nd mechanism of the folding type wheelchair of an Example. It is principal part sectional drawing of the 1st mechanism of the folding-type wheelchair of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Folding type wheelchair 10 ... Right frame 11 ... Right front wheel 12 ... Right rear wheel 13a, 14a ... Right side surface 20 ... Left frame 21 ... Left front wheel 22 ... Left rear wheel 23a, 24a ... Left side surface 30, 50 ... Right Plate 40, 60 ... Left plate 31, 41, 51, 61 ... First end surface 32, 42, 52, 62 ... Second end surface 80, 85 ... Seating means (80 ... Seat belt, 85 ... Seat cushion)
100, 200 ... folding mechanism (100 ... first mechanism, 200 ... second mechanism)
110, 140 ... right hinge 120, 150 ... left hinge 130, 160 ... middle hinge

Claims (4)

A right frame having a right front wheel and a right rear wheel; a left frame having a left front wheel and a left rear wheel located on the left side of the right frame; the right frame and the left frame; A folding mechanism provided between the right frame and the left frame, and a folding mechanism configured to expand and fold the right frame and the left frame, and the right frame and the left frame. In a foldable wheelchair provided with seating means for seating an occupant in a state in which the frame is deployed,
The right frame body has a right side surface extending in the vertical direction, and the left frame body has a left side surface extending in the vertical direction while facing the right side surface;
The folding mechanism includes a first mechanism provided on the buttock side of the occupant and a second mechanism provided on the back side of the occupant,
The first mechanism and the second mechanism have a right plate and a left plate having a first end surface and a second end surface that have a thickness and are back from each other;
A right hinge connecting the right side and the corner of the first end surface of the right plate on the occupant side, and fixing the right plate to the right side so as to be swingable;
A left hinge for connecting the left side surface and the corner of the first end surface of the left plate on the occupant side, and for swingably fixing the left plate to the left side surface;
Connecting the corner portions of the side opposite to the occupant side of the second end surface of the right plate and left plates, Ri Do and a hinge in fixing the said right plate and left plates can swing each other ,
A flexible right belt is stretched between the right plate of the first mechanism and the right plate of the second mechanism, and the left plate of the first mechanism and the left of the second mechanism collapsible wheelchair left belt a flexible between the plates, characterized that you have been stretched. The seating means, folding wheelchair according to claim 1, wherein the seating belts flexible to be stretched between the right frame and the left frame. The foldable wheelchair according to claim 2, wherein a position where the seating belt is stretched between the right frame body and the left frame body can be changed. The foldable wheelchair according to any one of claims 1 to 3 , wherein all the constituent members are non-magnetic materials.

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