JP2000237243A - Under carriage of wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an under carriage of a foldable wheelchair wherein luggages, or the like, can be loaded on the back side of side frames under an extended state. SOLUTION: Side frames 10a and 10b are moved in the longitudinal direction, and are combined with a slide member 11 which is crossed into a horizontal X-shape, and respective one-end sections of the slide member 11 are pivotally connected to the front end sections of the side frames 10a and 10b, and respective other ends of the slide member 11 are provided movably in the longitudinal direction in a manner to form a housing space 20 extending from an approx. intermediate section to the rear side of the side frames 10a and 10b, and the wheelchair is constituted in such a manner that, when the under carriage is under an extended state, the other ends of the slide member 11 may be located at the approx. intermediate section in the longitudinal direction of the side frames 10a and 10b, and a lock mechanism 30 which keeps the extended state of the pair of the right and left side frames 10a and 10b, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding wheelchair chassis, and more particularly, to a wheelchair which is connected to a pair of left and right side frames in a front-rear direction by sliding members crossed in a horizontal X-shape. It is about chassis.

[0002]

2. Description of the Related Art The demand for wheelchairs has been increasing year by year, as those who leave themselves in wheelchairs adopt a more active lifestyle. Under these circumstances, various types of wheelchair chassis whose seat portions can be replaced according to the order of the user have been proposed.

[0003] Among them, for reasons of running stability and the like, as shown in FIG. 9, a pair of left and right side frames are moved in the front-rear direction and connected by a slide member 1 crossed in a horizontal X-shape. One end 1 of each of the members 1
a, 1b are pivotally attached to intermediate portions in the front-rear direction of the left and right side frames, and the other ends 1c, 1d of the slide members are provided with a telescopic mechanism capable of expanding and contracting along the longitudinal direction of the slide members 1. There has been proposed a folding wheelchair chassis which is pivotally attached to a rear end of the side frame in the front-rear direction via the side frame.

[0004]

However, in such a conventional wheelchair undercarriage, the other end 1 of the slide member is not provided.
c and 1d are pivotally attached to the rear end of the side frame, so that when the unfolded state is set, even if it is desired to place luggage or the like on the rear side of the side frame, the other end 1c, 1
d becomes a hindrance, and it is not possible to place personal items according to the obstacle or injury. For this reason, luggage and the like of patients and caregivers who use wheelchairs must be carried in general luggage bags or the like and carried over the handle provided at the top of the backrest of the wheelchair. In particular, there is a problem that the weight of the baggage may cause the baggage to fall rearward, especially when climbing up a slope with the baggage bag or the like hooked on the handle.

Accordingly, the present invention has been made in view of such problems existing in the prior art, and an object of the present invention is to load luggage or the like on the rear side of a side frame when the vehicle is in a deployed state. An object of the present invention is to provide a foldable wheelchair chassis that can be placed.

[0006]

Means for Solving the Problems To solve the above,
Means adopted by the present invention will be described with reference numerals used in the embodiment. In the case of the folding wheelchair chassis 100 according to claim 1, the seat portion 50 is detachable, and the front wheel and the rear wheel are A pair of left and right side frames 10 mounted on a shaft
a and 10b are supposed to be a foldable wheelchair chassis 100 that can be folded close to each other, and slide a pair of left and right side frames 10a and 10b in the front-rear direction to intersect in a horizontal X-shape. One end of each of the slide members 11 is pivotally connected to the front ends of the left and right side frames 10a, 10b, and a storage space 20 is formed from a substantially intermediate portion of the side frames 10a, 10b to the rear. The other ends of the slide members 11 are connected to the side frames 10a,
0b is provided so as to be movable in the front-rear direction, and the other end of the slide member 11 is located at a substantially intermediate portion in the front-rear direction of the side frames 10a, 10b when the chassis is in the unfolded state. A pair of side frames 1
The gist of the present invention is to provide a lock mechanism 30 for maintaining the unfolded state of Oa and 10.

The wheelchair chassis 100 thus constructed
In the above, when the pair of left and right side frames 10a and 10b in the folded state are separated from each other in the developed state, the slide member 1 intersecting in a horizontal X-shape connects these.
1 is moved in the front-rear direction, and the slide member 11 is moved.
Is stopped at a substantially intermediate portion while moving in the front-rear direction of the side frames 10a and 10b. In other words, the other end of the slide member 11 is connected to the left and right side frames 10.
a and 10b are fully deployed, and the side frame 10
The movement stops at a substantially middle portion in the front-rear direction of a and 10b. Therefore, a storage space 20 is formed from the other end of the slide member 11 to the rear, and a storage body 21 is installed in the storage space 20.

[0010] Next, in the undercarriage 100 of the foldable wheelchair, a pair of left and right side frames 10a on which the seat portion 50 is detachable and the front and rear wheels are pivotally mounted are provided.
A pair of left and right side frames 10a and 10b are moved in the front-rear direction and connected by slide members 11 crossed in a horizontal X-shape, and each of the slide members 11 Is pivotally attached to the front ends of the left and right side frames 10a and 10b, and when the chassis is in an unfolded state, a storage space 20 is provided from a substantially middle portion in the front-rear direction of the side frames 10a and 10b to the rear. For this purpose, the other end of each of the slide members 10a and 10b is pivoted to a substantially intermediate portion in the front-rear direction of the side frames 10a and 10b via a telescopic mechanism 12 that can expand and contract along the longitudinal direction of the slide members 10a and 10b. And a lock mechanism 30 for maintaining the unfolded state of the pair of left and right side frames 10a, 10 is provided. It was the gist.

In the foldable wheelchair chassis 100 constructed as described above, when the pair of left and right side frames 10a and 10b in the folded state are separated from each other in an expanded state, they are connected in a horizontal X-shape. The crossed slide member 11 is moved in the front-rear direction, and the other end of the slide member 11 stops moving while being displaced via the extension mechanism. That is, the other end of the slide member 11 moves in the axial direction of the slide member 11 while being pivotally attached to a substantially intermediate portion of the side frames 10a and 10b. Therefore, a storage space 20 is formed from the other end of the slide member 11 to the rear, and the storage body 2 is formed here.
1 is installed.

Next, according to a third aspect of the present invention, a foldable wheelchair chassis 100 includes a seat portion 50 which can be folded in accordance with the folding of the chassis 100, wherein the seat portion 50 is centered on a tilt axis provided on the chassis 100. The gist of the invention is that it is provided to be tiltable with respect to 100.

[0011] In the foldable wheelchair chassis 100 configured as described above, since the reclining is performed according to the injury or illness of the user, a stable posture is maintained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a chassis according to the present invention will be described. However, this is a typical example, and the present invention is limited by the following examples unless exceeding the gist. It is not something to be done.

FIG. 1 and FIG. 2 show an embodiment of a wheelchair chassis 100 according to the present invention.

As shown in these figures, a chassis 100 foldable together with a seat portion 50 is provided.
Reference numeral 0 denotes a pair of left and right side frames 10a and 10b on which a front wheel 40 and a rear wheel 41 are pivotally connected, which are connected by a slide member 11 which moves in the front-rear direction and intersects in a horizontal X-shape.

FIGS. 3 and 4 show an embodiment of a wheelchair chassis 100 according to the present invention. In these figures, the frame of the chassis 100 is shown so that the structure of the chassis 100 is clear, but front wheels, rear wheels, and the like are appropriately disposed on the side frames 10a and 10b in the above-described drawings. Things.

As shown in these figures, the undercarriage 100 is constituted by side frames 10a and 10b which are arranged to face each other via a slidable slide member 11 which is crossed in a horizontal X-shape. I have. The side frames 10a and 10b are formed symmetrically left and right, and a front wheel 40 and a rear wheel 41 are respectively mounted on the side frames 10a and 10b.

The side frames 10a and 10b are mainly composed of side pipes 23 and 24 extending in the front-rear direction and arranged vertically in parallel, and a rear pipe 25 and a front pipe 26 extending substantially vertically by connecting these. It is configured.

At the lower end of the rear pipe 25, a rear wheel 4
1 is provided so as to be rotatable and to allow the rear wheel to be detachably mounted on the bearing. Therefore, in the case of a user who cannot travel by himself, if the rear wheel smaller than the height of the seat portion constituting the seat portion is attached to the bearing portion 27, a wheelchair dedicated to a caregiver with a small turnability can be provided. Can be. Further, when the user of the wheelchair recovers to be operable by himself / herself by rehabilitation or the like, the rear wheel 41 provided with a hand rim that can be operated by himself / herself can be used by being mounted on the bearing 27. . If one of the rear wheels 41 is attached to the bearing 27 with a wheel smaller than the seat, and the other large wheel provided with a hand rim so that it can be operated on its own, the hemiplegia is obtained. It can be a wheelchair for patients. According to this, even a hemiplegic patient can run by himself by operating the large wheel provided with the hand rim with the unaffected hand, and the paralyzed side has a seat Because the wheel smaller than the height is mounted on the axle, if the armrest is removed upward, the user can get on and off from the side of the wheelchair. Therefore, transfer from a wheelchair to a bed, a sofa, a toilet, or the like can be easily performed. As shown in FIGS. 6 and 7, a foot brake 28 for braking the rear wheels is provided at the rear end of the side pipes 24 forming the left and right side frames.

As shown in FIGS. 3 and 4, the slide member 11 moves two rod members in the front-rear direction to
It is configured to intersect in a letter shape. The slide member 11 is
They are connected by cross bolts 11a. The cross bolt 11a is inserted into a through hole provided vertically to the slide member 11. One end of each of the slide members 11 is pivotally attached to the front pipes 26 of the left and right side frames 10a and 10b, and the other end of the slide member 11 is provided in the front-rear direction of the side frames 10a and 10b. The slide groove 12 is slidably provided. As a result, the left and right side frames 10a, 10
The slide member 11 is moved in the front-rear direction by applying an external operation such as bringing b closer to or away from b.

A pair of left and right side frames 10
a and 10b are separated from each other in the deployed state,
The other end of 1 stops at the front end position of the slide groove 12 while sliding forward in the slide groove 12 provided in the side frames 10a and 10b. That is, the other end of the slide member 11 stops sliding at a position in front of the substantially middle portion in the front-rear direction of the side frames 10a, 10b in a state where the left and right side frames 10a, 10b are fully deployed. At the rear end of the side pipe 24, a lock mechanism 30 for fixing the separation between the left and right side frames 10a, 10b is provided.

As shown in FIGS. 4 and 5, the lock mechanism 30 is composed of two plate members which are rotatably crossed at a substantially central portion via a cross pin 32. Both ends of the lock mechanism are rotatably disposed on the left and right side frames 10a and 10b via the connection bolts 31, respectively. A locking piece 33 is protruded from the upper edge of one of the plate members.
Thereby, when these plate members are aligned,
Since the straight state is maintained, each side frame 10
The separation width between a and 10b is limited.

Further, the locking machine groove 30 may be configured so that the distance between the left and right side frames 10a and 10b can be adjusted. That is, as shown in FIG. 4, if a plurality of insertion holes are provided in the plate member so that the insertion position of the cross pin 32 can be changed, the separation width between the left and right side frames 10a and 10b can be easily adjusted. . Thus, the seat width of the seat portion desired by the user can be easily adjusted and set.

As described above, the left and right side frames 10
a, 10b is fully deployed, so that the sliding of the other end of the slide member stops at a position in front of the substantially middle portion in the front-rear direction of the side frame. A storage space 20 is formed over the rear. Therefore, the storage body 21 can be installed in the storage space 20.

FIGS. 6 and 7 show the storage space 20.
As shown in FIG. 1, a detachable storage body 21 is provided. In the opening of the storage body 21, the side frame 10
In order to be easily attached to the slide grooves 12 provided in the a and 10b, four locking members 22 formed in an inverted U-shape are provided. The locking member 22 is not limited to this, and may be, for example, a fixing belt (not shown).
Any fixing means may be used, such as fixing to the side frame. Further, the storage body 21 may be formed in a box shape as shown in FIG.

Next, FIG. 8 shows another embodiment of the wheelchair chassis 100 according to the present invention.

The slide member 11 constituting the embodiment of this chassis is composed of two bar members intersecting in a horizontal X-shape, and the right and left ends thereof have side frames 1 respectively.
0a and 10b are provided. The slide member 11
Are connected to the left and right side frames 10 respectively.
a and 10b are rotatably connected to the front pipe 26. On the other hand, the other end of each of the slide members 11 is connected to the side frame 10 via a telescoping mechanism 13 which can be telescopically extended along the axial direction of the slide members 11.
a and 10b are rotatably pivotally attached to substantially intermediate portions in the front-rear direction.

The extension mechanism 13 is configured such that the other end of the slide member 11 can slide in a nested state inside. In this manner, the other end of the slide member is pivotally connected to the intermediate portion of the side frame so that the storage space 20 is formed from the intermediate portion of the side frames 10a and 10b to the rear. Therefore, the storage body 21 can be installed in the storage space 20. The wheelchair chassis 100 having such a configuration also has substantially the same operation and effect as those of the above-described chassis, and thus the above description is referred to.

Next, as shown in FIGS. 1 and 2, a seat portion 50 is rotatably provided on a chassis 100 of a wheelchair according to the present invention.

The seat 50 is composed of a pair of left and right side frames. Each side frame includes a back frame located on the rear wheel side and a step frame located on the front wheel side, a seat frame disposed between the back frame and the step frame, and the seat frame and the back frame. And an armrest arranged in the armrest. The left and right side frames are provided with a cover body having elasticity to form a backrest, a seat, and a step.

As shown in FIG. 3, from the upper ends of the left and right front pipes 26 constituting the chassis 100, a support frame 51 arranged in parallel with the side pipes 23 is bent and extended to an intermediate portion of the side pipes 23. A joint pipe 52 for connecting the support frame 51 to the side pipe 23 is provided in a vertical direction. At the rear end of the support frame 51, a connecting portion 53 serving as a tilt shaft is provided, and the seat portion 50 is supported by the connecting portion 53 via a connecting bolt so as to be tiltable.

As shown in FIGS. 6 and 7, on the back surface of the back of the seat portion 50 and the rear portion of the chassis, a fixing device 5 such as a damper, which is configured to be extendable and contractible and has a fixed length.
4 are provided. These two fixing devices 54
Has one end on each side of the back of the back of the seat,
The other end is axially attached to the side pipes 24 forming the side frames 10a and 10b via connecting pins. Then, the tilting state of the seat portion 50 is fixed by the fixing device 54. The operation of the fixing device 54 is performed via a wire by an operation lever (not shown) provided on a handle portion fixed to the upper portion of the back portion, so that the caregiver can easily operate the device. It is.
Further, the present invention is not limited to such a manual fixing device 54. For example, a telescopic fixing device 5 employing an electric jack or the like can be used.
4, the seat portion 54 may be tilted electrically to fix the tilted state.

The seat 50 is not limited to the above embodiment. For example, when the backrest is tilted, the seat moves in the step direction and the backrest of the seat rises. May be configured. According to this, even when the vehicle is reclined, the vehicle can be reclined in a stable posture.

The wheelchair chassis 1 having the above configuration
The effect exerted by the 00 embodiment will be described below. (1) In the wheelchair chassis 100 in the above embodiment, the rear wheels 41 are attached to the side frames 10a and 10b.
Is rotatably supported and a bearing portion 27 is provided on which the rear wheel can be detachably mounted. According to this, the size of the wheels can be appropriately changed according to the state of the injury or obstacle of the user. (2) In the chassis 100 of the wheelchair according to the above-described embodiment, when the left and right side frames 10a, 10b are fully deployed, the other end of the slide member 11 slides substantially in the front-rear direction of the side frames 10a, 10b. It is configured to stop at a more forward position. Therefore,
Since the storage space 20 is formed from the other end of the slide member 11 to the rear, the storage body 21 can be installed in the storage space 20, and not only personal belongings such as a cushion and a blanket of a patient but also a portable ventilator. , Aspirator,
A portable electrocardiogram measuring device and a battery for operating the same can be stored. (3) In the wheelchair chassis 100 in the above embodiment, the lock mechanism 30 is rotatably disposed between the left and right side frames 10a and 10b via a connection bolt. As a result, the left and right side frames 10a, 10
b can limit the separation width. Further, by configuring the length of the lock mechanism 30 to be adjustable, the separation width between the left and right side frames 10a and 10b can be adjusted. Thus, the seat width of the seat portion desired by the user can be easily adjusted and set. (4) In the chassis 100 of the wheelchair in the above embodiment, the seat portion 50 is provided to be tiltable via a tilt shaft on the chassis. For this reason, the user can recline to a stable posture. Further, since the seat portion is configured to be foldable together with the chassis, the seat portion can be compactly folded.

By the way, the present invention is not limited to the above-described embodiments, but includes improvements, modifications and the like within a range that can achieve the object of the present invention. For example, in the present embodiment, the lock mechanism 30 is composed of two plate members rotatably crossed at the center via the cross pin, but is not limited thereto.
For example, a wire member connecting the left and right side frames may be used. Further, in the present embodiment, in order to make the locking machine groove freely adjustable in the separation width between the left and right side frames,
Although one of the plate members is provided with a plurality of insertion holes so that the insertion position of the cross pin can be changed, the present invention is not limited to this. It may be formed in a nested shape made of a tube so that it can expand and contract.

[0035]

As described above, in the wheelchair according to the first or second aspect, the seat portion is detachable, and the pair of left and right side frames on which the front wheel and the rear wheel are pivotally mounted can be folded close to each other. It is assumed that the chassis of the folding wheelchair is made, a pair of left and right side frames are moved in the front-rear direction and connected by slide members crossed in a horizontal X shape, and one end of each of the slide members is connected. The other end of the slide member is movably provided in a front-rear direction of the side frame so as to pivotally attach to a front end portion of the left and right side frames and form a storage space extending from a substantially middle portion of the side frame to the rear. The other end of the slide member is located at a substantially intermediate portion in the front-rear direction of the side frame when in the unfolded state, and the pair of left and right side frames is configured. It is provided with a locking mechanism to keep the beam state of deployment. Thereby, the storage body can be installed in the storage space, and not the personal belongings such as the cushion and the blanket of the patient but the portable respirator, the suction device, the portable electrocardiogram measuring device, and the battery for operating these devices are stored. be able to.

In the wheelchair chassis according to the second aspect of the present invention, the seat portion is detachable, and a pair of right and left side frames on which the front wheel and the rear wheel are pivotally mounted can be folded close to each other. And a pair of left and right side frames are moved in the front-rear direction and connected by slide members crossed in a horizontal X-shape, and one end of each of the slide members is connected to the left and right side frames. The other end of the slide member is connected to the slide member so as to provide a storage space from a substantially middle portion in the front-rear direction of the side frame to the rear when the chassis is in an expanded state. Is pivotally attached to a substantially intermediate portion in the front-rear direction of the side ram through a telescopic mechanism that can expand and contract along the longitudinal direction. According to this, it is possible to install the storage body in the storage space, and not portable accessories such as a patient's cushion or blanket, but a portable ventilator, an inhaler, a portable electrocardiogram measuring device, and a battery for operating these devices. Can be stored.

Finally, in the wheelchair chassis according to the third aspect, the seat portion which can be folded along with the folding of the chassis can be tilted with respect to the chassis about a tilt axis provided on the chassis. Claim 1
In addition to the effects achieved by the chassis described in item 2, it is possible to maintain a stable posture in accordance with the injury or obstacle of the user, and furthermore, it is possible to compactly fold the seat together with the chassis.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a seat is attached to a chassis according to the present invention.

FIG. 2 is a perspective view showing a state where the vehicle according to the present invention is folded in a state where a seat is attached to the chassis;

FIG. 3 is a side view showing a chassis according to the present invention.

FIG. 4 is a plan view showing a chassis according to the present invention.

FIG. 5 is a rear view showing a lock mechanism constituting the chassis according to the present invention.

FIG. 6 is a rear view showing a state where a storage body is attached to a storage space of the chassis according to the present invention.

FIG. 7 is a rear perspective view showing a state where a storage body is attached to a storage space of a chassis according to the present invention.

FIG. 8 is a plan view showing another embodiment of the chassis according to the present invention.

FIG. 9 is a perspective view showing a chassis of a conventional wheelchair.

[Explanation of symbols]

 10a side frame 10b side frame 11 slide member 12 slide groove 13 expansion mechanism 20 storage space 21 storage body 22 locking member 23 side pipe 24 side pipe 25 rear pipe 26 front pipe 27 bearing 28 foot brake 30 lock mechanism 31 connecting bolt 32 cross pin 33 locking piece 40 front wheel 41 rear wheel 50 seat part 51 support frame 52 joint pipe 53 connecting part 54 fixing device 100 chassis

Claims (3)

[Claims] 1. A foldable wheelchair undercarriage in which a seat portion is detachable and a pair of left and right side frames on which a front wheel and a rear wheel are pivotally mounted are foldable close to each other. Moving in the front-rear direction and connected by a slide member crossed in a horizontal X-shape, one end of each of the slide members is pivotally connected to the front ends of the left and right side frames, and from a substantially intermediate portion of the side frames. The other end of the slide member is movably provided in the front-rear direction of the side frame to form a storage space over the rear, and the other end of the slide member is moved in the front-rear direction of the side frame when the chassis is deployed. A folding mechanism configured to be located at a substantially intermediate portion, and provided with a lock mechanism for maintaining a deployed state of the pair of left and right side frames. Folding wheelchair chassis. 2. A foldable wheelchair chassis in which a seat portion is detachable and a pair of left and right side frames on which a front wheel and a rear wheel are pivotally mounted can be folded close to each other. Move in the direction and horizontal X
Are connected by slide members crossed in the shape of a letter, one end of each of the slide members is pivotally connected to the front ends of the left and right side frames, and when the undercarriage is in a deployed state, the side frames are substantially in the front-rear direction. The other end of each of the slide members to form a storage space from the middle to the rear,
A locking mechanism is provided which is pivotally attached to a substantially intermediate portion in the front-rear direction of the side frame via a telescopic mechanism which is extendable and contractible along the longitudinal direction of the slide member, and which maintains the unfolded state of the pair of left and right side frames. A foldable wheelchair chassis. 3. The vehicle according to claim 1, wherein a seat portion foldable along with the folding of the chassis is provided to be tiltable with respect to the chassis about a tilt axis provided on the chassis. 3. The foldable wheelchair chassis according to 1 or 2.