JP2002065752A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair which reclines the handicapped while keeping a sitting posture and swings stably in reclining. SOLUTION: The wheelchair 1 has a pair of right and left wheel frame bodies 10 and a seat frame body 20 which is arranged between the pair of the bodies 10 and is swingable with respect to the bodies 10. The bottom frame 23 of the body 20 has two rails to engage the outer peripheral surface of a guide frame 14 so as to slide, and the body 20 is supported by the frame 14. A locking device 30 having a connector 31 to be connected with a wheel frame body 10 is arranged at the back frame 24 of the body 20 and is swingable in the state of grasping the piston part 32 of the connector 31, thereby a distance between fixtures 34 and 35 to be supported by both end parts of the connector 31 is varied to lock the swinging position of the body 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a wheelchair,
More specifically, the present invention relates to a wheelchair in which a disabled person can recline while sitting.

[0002]

2. Description of the Related Art In general, in a wheelchair, a seat frame body for supporting a disabled person is provided with a side frame for mounting a sitting position seat, a front frame connected to a front wheel, a rear frame connected to a rear wheel, and a backrest seat. And a back frame to be configured, and the caregiver operates a wheelchair by operating a nursing handle portion arranged on the back frame,
In addition, the disabled person himself drives the wheelchair by operating the operating wheel arranged on the rear wheel. And, in these wheelchairs, a reclining mechanism configured for a person with a disability to extend his back was known.

[0003] A conventional reclining mechanism in a wheelchair has been constructed by configuring a back frame so as to be tiltable with respect to a side frame. However, if the back frame is configured to be tiltable with respect to the side frame, the tilting fulcrum of the back frame and the bending fulcrum of the disabled person will be different. I had to. This operation was to be made extremely difficult by severely disabled people. To solve this, for example, Japanese Patent Application Laid-Open No. 7-4
No. 57 and Japanese Patent Application Laid-Open No. H11-155908 have provided improved wheelchairs.

[0004]

The reclining mechanism disclosed in the conventional publication, for example, the one disclosed in the former publication (Japanese Patent Laid-Open No. 7-457) has a tilting fulcrum portion of a back frame attached to a main body. In addition to supporting tiltable,
The seat is rotatably supported at a position below the tilt fulcrum of the back frame, and the step side of the seat is rotatably and slidably supported by the main body. With this, even when the disabled person is in a wheelchair, the seat moves forward even if the back frame is tilted, so that the disabled person can maintain a stable posture without shifting the buttocks. .

[0005] The latter publication (JP-A-11-15590)
No. 8) has a structure in which the back frame is configured in two stages, the upper frame is slidable on the lower frame, and when the back frame is tilted, the upper frame supports the back of the disabled person. By sliding the frame to the lower frame side,
It was possible to recline while maintaining a stable posture without shifting the buttocks of the disabled.

However, in any case disclosed in the above publication, the back frame is a seat (or a side frame).
The person with a disability cannot recline without losing his sitting posture. As a result, a severely disabled person may not be able to move their body and may have difficulty in reclining. Moreover, in any of the reclining mechanisms, since the back frame is configured to be supported only by the pin with respect to the seat (or the side frame), the pin receives the weight of the disabled person and the pin is damaged. It was easy and risky for people with disabilities.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a wheelchair capable of performing a reclining action while maintaining a stable posture of a disabled person and having a firmly configured reclining mechanism. Aim.

[0008]

The wheelchair according to the present invention is configured as follows in order to solve the above-mentioned problems. That is, a pair of wheel frame bodies that support the front wheel and the rear wheel are arranged in a pair on the left and right with a seat frame body having a back frame, a side frame, and a leg frame and supporting a disabled person to be able to sit. A wheelchair, wherein the seat frame body and the pair of wheel frame bodies are pivotally mounted to swingably support the seat frame body, and the seat frame body and the pair of wheel frame bodies are And a guide means slidably supporting the seat frame body when the seat frame body swings.

Preferably, the guide means includes a guide projecting from the seat frame, and a guide frame disposed on the wheel frame and slidably engaging the guide. It should just be done.

[0010] It is further preferable that the seat frame is configured to be foldable in the width direction at a central portion.

Further, the seat frame includes a shaft protruding from the seat frame, and a lock body for gripping the shaft, and the shaft changes the gripping position to thereby change the position of the seat frame. It is desirable to have a locking device that can stop at an appropriate angle.

It is more preferable that a headrest is formed on the back frame so that the headrest can be mounted thereon.

[0013]

According to the wheelchair of the present invention, when the back frame of the seat frame body is tilted with respect to the wheel frame body, the seat frame body is guided by the guide frame portion of the wheel frame body to form a pair of left and right wheels. Swung with respect to the frame body. Since the wheel frame body is configured with the back frame, the side frame, and the leg frame,
The disabled person sitting on the seat frame body can perform the reclining action in the sitting posture, and even a severely disabled person who cannot move his / her body can recline in a stable posture. In addition, when the seat frame swings with respect to the wheel frame, not only the pin at the swing fulcrum but also the guide means can slide, so that the weight of the disabled person is sufficiently supported. This makes it possible for a disabled person to be safely reclined in a wheelchair.

In addition, if the guide which can be engaged with the guide frame provided on the wheel frame is configured to slide on the seat frame when the seat frame swings, the disabled Can be supported via the guide frame, so that the reclining action can be stably performed.

Further, since the wheelchair of the present invention is formed so as to be foldable in the width direction, it can be made compact and easy to carry.

Further, in the wheelchair of the present invention, the seat frame body swung with respect to the wheel frame body can be locked by grasping any part of a shaft protruding from the seat frame body. From
It can be locked firmly at any angle according to the needs of the disabled.

Further, when the disabled person swings backward without losing his sitting position, the disabled person's head is supported by the headrest mounted on the back frame, so that the disabled person swings backward. Even if this is done, the reclining action can be performed while maintaining a stable posture.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. ADVANTAGE OF THE INVENTION The wheelchair of this invention can rock | swing a disabled person backward, without disturbing a sitting posture, and can rock | fluctuate very smoothly, and can support stably at the time of rocking, when a reclining person is boarded. For this purpose, the wheelchair 1 according to the embodiment has a pair of left and right front wheels 3 and rear wheels 5 and left and right supporting the front wheels 3 and rear wheels 5 as shown in FIGS. The vehicle includes a pair of wheel frame bodies 10 and a seat frame body 20 disposed between the pair of wheel frame bodies 10 and capable of swinging with respect to the pair of left and right wheel frame bodies 10.

As shown in FIG. 3, each of the wheel frame bodies 10 includes an upper frame 11 having a fulcrum 13 pivotally attached to a seat frame body 20, and a lower frame connecting the front wheel 3 and the rear wheel 5. 12 and a guide frame 14 arranged on the upper frame 11 and formed in an arc around the fulcrum 13.

In order to connect the front wheel 3 and the rear wheel 5, the upper frame 11 is formed in a mountain shape by disposing a fulcrum 13 at an upper portion of a substantially central portion in the embodiment.
A joint part 4 for connecting the axle 3a of the front wheel 3 is fixed to the front part of the vehicle, and the axle 5a of the rear wheel 5 is fixed to the rear part of the upper frame 11. Further, in order to form the wheel frame body 10 firmly, a lower frame 12 is fixedly attached to the upper frame 11 so that a front end and a rear end of the upper frame 11 have a bent portion and extend in a substantially horizontal direction. 11 and lower frame 1
2 form a frame.

As shown in FIG. 1, a brake body 7 for stopping the rotation of the rear wheel 5 has a lever 7a for manual operation, and is disposed between the upper frame 11 and the guide frame 14. It is mounted on the frame 15.

As shown in FIG. 1, the seat frame body 20 includes an armrest frame 21 arranged at a position where the disabled person rests his / her elbow in a sitting position, and a side frame 22 arranged below the armrest frame 21. , A bottom frame 23 disposed below the side frame 22 and an armrest frame 21
Back frame 2 that rises from the bottom frame 23 toward the upper part of the armrest frame 21 at the rear of the base frame 23
4, a leg frame 25 arranged to bend from the front bending portion of the armrest frame 21 toward the lower front,
And arranged inside the pair of wheel frame bodies 10.

The armrest frame 21 has an L-shape bent at the upper front so as to connect a back frame 24 arranged substantially vertically at a rear end and a front end of a bottom frame 23 arranged substantially horizontally. The armrest 21a is attached to the upper surface in the horizontal direction.

The upper and lower frames 2 of the armrest frame 21
In the embodiment, the side frame 22 disposed between the upper frame 3 and the upper frame 3 is supported by being axially attached to the upper frame 11 of the wheel frame body 10. That is, the side frame 22
1 and 4, as shown in FIGS. 1 and 4, the lower end of the upper frame 11 is pivotally attached to the tip of the shaft 132 of the fulcrum 13 fixed via the cylinder 131 via the cylinder 221. , The seat frame body 20 is arranged to be swingable with respect to the wheel frame body 10.

The bottom frame 23 connects the lower end of the back frame 24 from the lower portion of the leg frame 25,
It extends further rearward, and is formed so as to bend below the guide frame 14 of the wheel frame body 10 along the arc-shaped guide frame 14 at an intermediate portion. As shown in FIG. 5, brackets 26 fixed to the bottom frame 23 at two places are arranged so as to surround the guide frame 14 and hold the outer peripheral surface of the guide frame 14 formed in a pipe shape. A pair of rollers 27, which are slidably disposed, are formed so as to be pivotally supported.

Accordingly, the seat frame body 20 is swung with respect to the wheel frame body 10 while being guided by the guide frame 14 via the bottom frame 23, and the weight of the disabled person riding on the seat frame body 20 is reduced. It will be supported by the wheel frame body 10 via a pair of rollers 27,27.

The rollers 27 are provided on the guide frame 14.
The shape is not particularly limited as long as it slides on the outer circumferential surface of the guide frame 14. In the embodiment, a drum-shaped outer circumferential surface having a concave arc portion 271 having substantially the same shape as the outer diameter of the guide frame 14 is formed. Are arranged in a pair with the guide frame 14 interposed therebetween so as to contact the outer peripheral surface of the guide frame 14. Of course, the roller may be formed in a pipe shape such that the inner peripheral surface of the roller is fitted to the outer peripheral surface of the guide frame 14.

As shown in FIG. 1, the back frame 24 is formed so as to hang a backrest sheet 24a, and is bent rearward at an upper end to form a handle portion 241 operated by a caregiver. A lock device 30 is arranged to regulate and lock the swinging position of the seat frame body 20 connected from the longitudinal middle portion of the seat frame 24 to the rear portion of the upper frame 11 of the wheel frame body 10.

The leg frame 25 is formed by bending downward from the front from a position facing the tip of the side frame 22 of the front vertical portion 211 of the armrest frame 21 and has a footrest 28 that can be opened and closed.

As shown in FIG. 1, the lock device 30 is a telescopic connector 31 which connects the middle portion of the back frame 24 and the rear end of the upper frame 11 (near the axle 5a of the rear wheel 5). The swing angle of the seat frame body 20 with respect to the wheel frame body 10 can be freely set by appropriately regulating the distance of the vehicle.

The connecting member 31 in the embodiment employs a commercially available mechanical lock device. The mechanical lock device has a cylinder portion 32 and a piston portion 33 that slides through the inside of the cylinder portion 32, and a tip of the piston portion 33 can be pivotally attached to an intermediate portion of the back frame 24 via a mounting bracket 34. And one end of the cylinder portion 32 is pivotally hooked to a mounting bracket 35 rotatably mounted on the rear end portion of the upper frame portion 11, and the cylinder portion 32 into which the piston portion 33 is inserted is The diameter can be reduced. A pair of operation levers 36 for operating the diameter reduction operation of the cylinder portion 32 are paired with a pair of handle portions 241 of the back frame 24.
And wires 37 connected from the cylinder portion 32, respectively.
Is mounted via.

When the operating lever 36 is not normally operated by hand, the cylinder portion 32 is reduced in diameter to hold the piston portion 33 in a locked state.
7, the cylinder portion 32 is expanded in diameter and the piston portion 3 is expanded.
3 is made movable. Thereby, the piston part 33
The distance between the mounting bracket 34 and the mounting bracket 35 can be changed as appropriate, and the seat frame body 20 can be made to swing at an appropriate position.

The wheelchair 1 of the embodiment has a seat frame 2
0 can be folded in the width direction. As shown in FIG. 6, a pair of left and right bottom frames 23, 23 and a pair of left and right seat frames 41, 41 arranged inside the pair of left and right side frames 22, 22 are formed in a cross shape so as to be connected. It has a folding mechanism 40 in which a pair of connecting rods 42, 42 are pivotally attached at respective ends.

The pair of connecting rods 42, 42 are coaxially and rotatably supported by a fulcrum 43 at the center of the cross, so that the seat frames 41, 4 around the fulcrum 43 are centered.
1 rotates at the pivot point 232 of the mounting portion 231 protruding inward from each of the bottom frames 23, 23 so that the pair of wheel frame bodies 10, 10 can be folded by approaching or separating from each other. Make up. In addition, the sitting frame 45 is hung on the seat frame 41 so that the disabled person can sit on the seat frame 41, and the folding mechanism 40 is disposed at two places in the front-rear direction of the seat frame 41 (see FIG. 1). And
By pushing up the central portion in the width direction of the seating seat 45 upward, the pair of connecting rods 42, 42 are pivoted at the pivot points 232,
When the folding mechanism 40 is rotated around the center 232, the folding mechanism 40 is folded around the fulcrum 43.

As shown in FIG. 2, receiving portions 242 for supporting a headrest 29 on which a head sheet 291 is mounted are provided on the upper portions of the pair of left and right back frames 24, 24.
242 is formed so that the headrest 29 can be attached and detached, and is configured to be able to support the head of the disabled person when the seat frame body 20 swings backward.

Further, as shown in FIG. 1, the wheelchair 1 of the embodiment is provided with a brake device 8 for pressing the axle 5a to stop the rotation of the rear wheel 5, and a handle portion 2 of the back frame 24.
An operation handle 81 and a wire 82 (see FIG.
).

Next, the operation of the wheelchair 1 configured as described above will be described.

When the wheelchair 1 of the present embodiment is used with a severely disabled person on board, during normal driving, the seat frame 20 is set upright with respect to the wheel frame body 10 as shown in FIG. Thus, the disabled person is seated on the seat 45 and the brake body 7 for the rear wheel 5 is separated from the rear wheel 5. Then, the wheelchair 1 is caused to travel by the caregiver operating the handle portions 241 and 241.

When the reclining is performed, the reclining operation levers 36, 36 mounted on the handle portions 241, 241 are grasped, and the wires 37, 37 are pulled to thereby move the piston portions 33 of the locking devices 30, 30. After releasing the lock between the cylinder portions 32, 32 and the handle portions 241, 24 as shown in FIG.
1 by moving the seat frame body 2 downward.
0 is swung rearward with respect to the wheel frame body 10.

At this time, while the roller 27 mounted on the seat frame body 20 slides along the guide frame 14 of the wheel frame body 10, the seat frame body 20
The rear frame 24, the side frame 22, the armrest frame 21, and the bottom frame 23 are rotated rearward about the fulcrum 13 of the wheel frame body 10 in a state where they are integrated without changing the angle between the frames. .

The locking device 30 is provided with a piston 33
Is released from the cylinder portion 32, thereby enabling movement into the cylinder portion 32. By swinging the seat frame body 20 backward, the piston portion 33 of the lock device 30 causes the cylinder portion 32 And the distance between the mounting bracket 34 on the piston portion 32 side and the mounting bracket 35 on the cylinder portion 33 is changed to set an appropriate swing angle of the seat frame body 20. Release the hands from 36, 36 to stop the movement of the piston part 33 and lock it.

Accordingly, since the seat frame 20 is swung integrally with the wheel frame 10 while maintaining the angles of the side frame 22, the back frame 24 and the bottom frame 23, the disabled person is traveling. Is swung rearward together with the seat frame body 20 in the posture of sitting.

At this time, since the roller 27 protruding from the bottom frame 23 of the seat frame body 20 is slid along the guide frame 14 of the wheel frame body 10, the weight of the disabled person is It is supported by the shaft 132 of the portion 13 and supported by the guide frame 14 via the roller 27. In addition, since the headrest 29 is attached to the back frames 24, 24, the head of the disabled person is swung backward and the center of gravity moves backward, so that the headrest 20 maintains a stable posture. Will be done.

Accordingly, as described above, when the back frame 24 of the seat frame body 20 is swung with respect to the wheel frame body 10, the
Since 0 is swung with respect to the wheel frame body 10 while being guided by the guide frame 14 of the wheel frame body 10, the disabled person sitting on the seat frame body 20 performs the reclining action in the sitting posture. It is possible,
Even a severely disabled person who cannot move can recline in a stable posture. Moreover, when the seat frame body 20 swings with respect to the wheel frame body 10, the seat frame body 20 can be slid while being supported by the guide frame 14 via the roller 27 as well as the shaft 132 of the swing fulcrum 13. Therefore, the weight of the disabled person can be sufficiently supported, and the disabled person can be safely reclined on the wheelchair 1.

Further, when the seat frame body 20 swings, the roller 27 that can be engaged with the guide frame 14 disposed on the wheel frame body 10 is configured to slide on the seat frame body 20. For example, since the weight of the disabled person can be supported via the guide frame 14, the reclining operation can be performed while maintaining a stable posture.

Moreover, since the wheelchair 1 of the present embodiment is formed so as to be foldable along the width direction, it can be made compact and easy to carry.

Further, the seat frame body 20 swung with respect to the wheel frame body 10 grips any part of the piston portion 33 of the mechanical lock device (connecting body 31) protruding from the seat frame body 20. , And can be firmly locked at any angle according to the demands of the disabled.

Further, when the disabled person swings backward without losing his sitting position, the head of the disabled person is placed on the back frame 24.
Because it is supported by the headrest 29 attached to the
The disabled person can perform the reclining action while maintaining a stable posture even if swung backward.

Note that the wheelchair of the present invention is designed so that a person with a disability can swing while sitting in a sitting position, and can be slidably guided and stably supported when the seat frame body swings. If there is, it is not limited to the above embodiment. For example, instead of providing the swing fulcrum portion 13 of the seat frame body 20 on the side frame 22 as shown in the figure, for example, it may be provided on the armrest frame 21,
In that case, a rail 27 as a guide that engages with the guide frame 14 may be provided so as to protrude from the side frame 22.

The portion of the lock device 30 that supports one end of the connecting body 31 may be the lower frame 12 instead of the upper frame 11 as long as it is provided on the wheel frame body 10. Rather than using a shaft, a shaft protruding downward from the back frame 24 via a mounting bracket 34, a cylindrical body having one end supported on the wheel frame body 10 via a mounting bracket 35 and passing through the shaft, Any other means may be used as long as it has a gripping portion that grips a part of the shaft that slides through and the distance between the mounting bracket 34 and the mounting bracket 35 is made variable. Further, a fulcrum lock means configured to lock the swing fulcrum of the seat frame body 20 may be used.

[Brief description of the drawings]

FIG. 1 is a side view showing a wheelchair according to one embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow II in FIG.

FIG. 3 is a side view showing a wheel frame of the wheelchair of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 3;

FIG. 6 is a rear view showing the folding mechanism of the wheelchair in FIG. 1;

FIG. 7 is an operation view showing a reclining state of the wheelchair in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wheelchair 3 ... Front wheel 5 ... Rear wheel 10 ... Wheel frame body 11 ... Upper frame 12 ... Lower frame 13 ... Support point part 14 ... Guide frame 20 ... Seat frame body 21 ... Armrest frame 22 ... Side frame 23 ... Bottom frame 24 ... Back frame 27 ... Roller 29 ... Headrest 30 ... Locking device 31 ... Connected body (mechanical lock) 32 ... Cylinder part 33 ... Piston part 34,35 ... Mounting bracket 36 ... Operation lever 37 ... Wire 40 ... Folding mechanism

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B62B 5/04 B62B 5/04 A 5/06 5/06 Z

Claims (5)

[Claims] 1. A pair of wheel frame bodies supporting a front wheel and a rear wheel are disposed on the left and right sides of a seat frame body having a back frame, side frames, and leg frames and supporting a disabled person so as to be able to sit thereon. A wheelchair, the seat frame body and the pair of wheel frame bodies,
While the seat frame body is pivotally mounted so as to swingably support, between the seat frame body and the pair of wheel frame bodies, when the seat frame body swings,
A wheelchair, wherein a guide means slidably supporting the seat frame body is provided. 2. A guide, wherein the guide means protrudes from the seat frame body, and a guide frame disposed on the wheel frame body to slidably engage the guide.
The wheelchair according to claim 1, comprising: 3. The wheelchair according to claim 1, wherein the seat frame body is configured to be foldable in a width direction at a central portion. 4. The seat frame body includes a shaft portion protruding from the seat frame body, and a lock body for gripping the shaft portion, and the shaft portion changes a gripping position, so that the seat frame body 4. The wheelchair according to claim 1, further comprising a lock device capable of stopping at an appropriate angle. 5. The wheelchair according to claim 1, wherein a headrest is formed on the back frame so as to be attachable.