JP2003334216A - Wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheelchair equipped with a device for overcoming obstacles which can easily overcome obstructions such as bumps or the like while moving. <P>SOLUTION: The wheelchair has the device for overcoming obstacles comprising a supporting frame disposed on a pivotally connected rectangular link, an auxiliary wheel frame, an operating frame, a connecting frame and an elastic body. The elastic body urges the auxiliary wheel frame to be pulled up to the upward direction, auxiliary wheels rotationaly move to the side of front wheels with downward or upward movement of an operation lever. When the auxiliary wheels engage the ground at the backward of the front wheels, with further possible upward movement of the operation lever, the auxiliary wheels rotationaly move to the side of front wheels furthermore and the front wheels move upwardly, higher than the auxiliary wheels. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair equipped with an obstacle overcoming device capable of easily overcoming an obstacle such as a step while running.

[0002]

2. Description of the Related Art Conventional wheelchairs are generally composed of a seat portion fixed to a pipe-shaped body frame, main wheels, front wheels, steering handles, etc., and are classified into a caregiver operation type and a user operation type. It can be separated into a power-running type and a carer or user-driven type.

Each of the wheelchairs as described above travels on a road, indoors, etc., with a main wheel and a front wheel in a state in which one person is placed, and is small in order to improve steerability of the front wheel. It is a sutra wheel.

Therefore, if there is an obstacle such as a step on the road or indoors, it will be very difficult to overcome the obstacle.

As a general method for overcoming an obstacle by a wheelchair, a caregiver or the like raises the front wheel to the height of the obstacle by tilting the entire wheelchair backward, and then advances the wheelchair in that state to advance the obstacle. Overcoming.
However, if the caregiver is a weak female or an elderly person,
Tilting the entire wheelchair backward is dangerous and difficult.

Since such problems exist in wheelchairs, various proposals have heretofore been made. For example, in Japanese Unexamined Patent Publication No. 8-38552, a rear wheel is further provided behind the main wheel in addition to the main wheel and the front wheel, and when the front wheel gets over an obstacle, the rear wheel is operated to rear the entire wheelchair. When the vehicle is tilted and tilted by a certain amount, it is supported by the rear wheels, the front wheels are raised to the height of the obstacle, the entire wheelchair is moved forward to get over the obstacle, and then the rear wheels are returned to their original positions. Is to do. By providing the rear wheel on the wheelchair in this way, the wheelchair is prevented from falling backward when the wheelchair gets over an obstacle.

Further, in Japanese Utility Model Laid-Open No. 59-185159, an auxiliary wheel device is attached to a carriage frame of a general hand-push type carriage, which is located between a front wheel and a rear wheel of the carriage and is located between the front wheels.
There is disclosed a device in which, when a carrier truck gets over an obstacle, the auxiliary wheels are lowered to levitate the front wheels to get over the obstacle.

Further, Japanese Patent Laid-Open No. 2001-112837 discloses that a bedridden elderly person, a sick person, a person with a lameness,
An invention of a bathing system using a wheelchair is disclosed, which enables a physically or mentally handicapped person to take a bath while sleeping or sitting without using a lot of manpower.

[0009]

[Problems to be Solved by the Invention]
The invention disclosed in Japanese Laid-Open Patent Publication No. 59 has a wheel for overcoming an obstacle in addition to a normal main wheel and a front wheel for traveling, and operating the overpass wheel to ground the overpass wheel. Then, it is a device that allows the front wheels to float and overcome obstacles. However, it is necessary to operate the climbing wheels both before and after climbing over, the configuration of the operating device itself is complicated, and the operation is troublesome, and when the user rides on a wheelchair and operates it. Has a problem that it is very difficult to operate.

In the invention disclosed in Japanese Patent Laid-Open No. 2001-112837, the wheelchair can be moved while lying down, but if the wheelchair remains lying down, it lacks stability and rolls over. There is a danger such as. In addition, when moving to the bath car, there may be obstacles such as steps, in which case caregivers have to climb over the steps by raising the front wheels. There is a high risk if the person is left asleep.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a caregiver operation type and user operation type, a power running type and a caregiver, It is applicable to any type of wheelchair, regardless of user driven type,
Further, it is to provide a wheelchair equipped with a device for overcoming obstacles such as steps of a wheelchair, which is characterized in that its operation is very easy.

Further, by equipping the wheelchair of the bathing system disclosed in the above-mentioned publication with the obstacle overcoming device of the present invention, even if the user is asleep, it does not lose its stability and is safe. It is possible to move to the bath car.

According to the invention of claim 1, a chair frame, a handle attached to the chair frame, a pair of main wheels and front wheels rotatably supported by the chair frame, and a lower portion of the chair frame. A wheelchair provided with an obstacle overcoming device provided with a support frame, an auxiliary wheel frame, an operating frame, a connecting frame arranged on quadrilateral links pivotally connected to each other. An elastic body, and the support frame has an upper end side fixedly supported by the chair frame,
The operation frame is vertically laid vertically, and the operation frame is an operation lever that is pivotally attached at a pivot fulcrum A at an intermediate position of the support frame and has both ends extended in the front-rear direction. One end side is an operation lever extended to either the rear side or the front side of the chair frame, the auxiliary wheel frame is on the side facing the operation frame, and one end side is the lower end side of the support frame. An auxiliary wheel is pivotally supported at a pivot point B, and is rotatably supported at the other end side extending rearward. One end of the connecting frame is pivotally connected to the operation frame at a pivot point C and the other end is pivotally supported. The elastic body is pivotally attached to the auxiliary wheel frame at a fulcrum D, the elastic body urges the auxiliary wheel frame to be pulled upward, and the auxiliary wheel is moved toward the front wheel side by moving the operation lever downward or upward. Turn to Of after landing backward, by further possibility or upward movement of said operating lever, a wheelchair to further floating the front wheel side the front wheel rotates upward from the auxiliary wheel.

According to a second aspect of the present invention, a chair frame, a handle attached to the chair frame, a pair of main wheels and front wheels rotatably supported by the chair frame, and a lower portion of the chair frame are provided. A wheelchair having an obstacle overcoming device and a transverse frame arranged in the left-right direction of the chair frame, wherein the obstacle overcoming device is arranged on a quadrilateral link pivotally connected to each other. A supporting frame, an auxiliary wheel frame, an operating frame, a connecting frame, and an elastic body, and the supporting frame is supported by the transverse frame at its upper end side, and is vertically oriented in a substantially vertical direction, The operation frame is pivoted at a pivot point A at an intermediate position of the support frame, and both end sides are operation levers extending in the front-rear direction, or one end side is a front side. The auxiliary lever frame is an operation lever extended to either the rear or the front of the chair frame, and the auxiliary wheel frame is on a side facing the operation frame, and one end side is a pivotal fulcrum B on the lower end side of the support frame. An auxiliary wheel is rotatably supported on the other end side extending rearward, and one end of the connecting frame is pivotally connected to the operation frame at a pivot point C and the other end is at a pivot point D. Pivotally attached to the auxiliary wheel frame, the elastic body urges the auxiliary wheel frame to be pulled upward, and the auxiliary wheel is
When the operation lever is moved downward or upward, the operation lever is rotated to the front wheel side, and after landing on the rear side thereof, further movement or upward movement of the operation lever is further rotated to the front wheel side, and A wheelchair in which the front wheels are floated above the auxiliary wheels.

In general, the front wheels are relatively small wheels because the steering of the wheelchair is emphasized, and it is difficult to get over obstacles. Therefore, according to the inventions of claims 1 and 2, when the wheelchair comes into contact with an obstacle, the user or caregiver can easily get over the obstacle by grounding the auxiliary wheel and floating the front wheel. Become.

According to a third aspect of the present invention, in the obstacle overcoming device, the pivotal support point A and the pivotal support point B are provided in a state where the auxiliary wheel is in contact with the ground and the front wheel is floating. In the wheelchair, an imaginary line β connecting the fulcrum A and the fulcrum D or an imaginary line γ connecting the support frame or the crossing frame and the fulcrum D is located in front of the imaginary line α.

According to the third aspect of the present invention, it is possible to maintain the levitation state without grounding the auxiliary wheels before getting over the obstacle, and it is possible to avoid friction caused by the grounding of the auxiliary wheels. It is possible to gradually reduce the energy consumption of a user or a caregiver when driving a wheelchair. Further, after getting over the obstacle, the auxiliary wheel automatically returns to the original position due to the change in the direction of the tension of the elastic body, so that the wheelchair can smoothly run after getting over the obstacle. That is, it is unnecessary for the user or the caregiver to return the obstacle passing device to the original position.

According to a fourth aspect of the present invention, the operating lever extended rearward has a footrest portion.

According to a fifth aspect of the present invention, there is provided a wheelchair in which the operation lever extended to the front is located below the front of the seat portion.

According to the inventions of claims 4 and 5, the caregiver can easily make the auxiliary wheel of the obstacle overcoming device ground and the front wheel levitate by the footrest portion and the user by the operation lever. .

According to a sixth aspect of the present invention, the operation lever extended to the front has an elastic body mounted therein, a grip portion is provided at one front end of the operation lever, and the elastic body is provided with the grip portion. A wheelchair in which the grip portion can be expanded and contracted by being mounted on.

If the operation lever is located in front of the wheelchair, there is a possibility that it may come into contact with the foot of the user sitting in the seat. In such a case, by making the operation lever extendable and retractable as in claim 6, the operation lever is extended forward from the seat portion of the wheelchair only when necessary when getting over an obstacle, and the user operates it. The lever can be made available and can be reduced to a position that is normally out of the way.

In the invention of claim 7, the auxiliary wheel frame has a plurality of pivot holes, and the pivot point B and the pivot point D are provided in any of the pivot holes. It is a wheelchair.

According to the seventh aspect of the present invention, the lengths of the pivot points B and D can be adjusted, and it is possible to adjust how much the front wheel is lifted.

According to an eighth aspect of the present invention, in the wheelchair, the transverse frame has the transverse frame joined to one of the left and right ends of the transverse frame so as to be vertically rotatable and is joined to either the left or right of the chair frame. A wheelchair having a rotating portion and a transverse frame bearing portion that is joined at a position opposite to a chair frame to which the transverse frame rotating portion is joined and that can be fitted to the other end of the transverse frame. .

According to a ninth aspect of the present invention, the transverse frame is
An obstacle overpassing device joining part, which is joined to the crossing frame turning part so as to be turnable, and the supporting frame of the obstacle overcoming device, and which has an L-shaped moving groove. And a transverse frame fitting portion which is fittable with the transverse frame bearing portion and a part of which is inserted in the obstacle overriding device joint portion, and the transverse frame fitting portion in the moving groove. An extension pin joined to the cross section, an elastic body is attached to the inside of the obstacle overpass device connection part, the elastic body is attached to the cross frame fitting part, and the cross pin is moved by moving the extension pin left and right. In the wheelchair, the fitting part moves left and right along the moving groove.

According to the eighth and ninth aspects of the present invention, the transverse frame is rotated upward by bringing the transverse frame into a fitted state or a non-fitted state with the transverse frame bearing portion joined to the chair frame. It becomes possible to fold the wheelchair.

According to a tenth aspect of the present invention, the wheelchair is located below the seat portion within the frame shape of the chair frame, and the transverse frame is rotated upward by the transverse frame rotating portion. Is a wheelchair in which a support pin for supporting the transverse frame is joined to the chair frame on the track.

According to the tenth aspect of the present invention, the transverse frame can be supported by the support pins when the wheelchair is folded. Further, even when the wheelchair is widened, when the obstacle overriding device is not used, the obstacle overriding device can be housed by engaging the supporting pin upwardly.

In the eleventh aspect of the present invention, in the obstacle overcoming device, the rotating joint portion has a U-shaped or inverted U-shaped rotating groove, and the obstacle overpassing device joint portion is The rotary joint is inserted into the rotary groove, and a protrusion that is joined to the obstacle overpass device joint is provided in the rotation groove, and the obstacle overpass device joint can be rotated back and forth along the rotation groove. This is a wheelchair in which the obstacle overriding device can rotate back and forth.

Some foldable wheelchairs have a chair frame having a cross structure at the bottom of the seat portion.
In the case of a wheelchair having such a structure, when the wheelchair is folded, the obstacle overcoming device may come into contact with the intersecting structure, and the wheelchair may not be sufficiently folded. Therefore, according to the eleventh aspect of the present invention, it is possible to prevent the contact with the crossing structure by making the obstacle overriding device rotatable forward and positioning it forward when folding. As a result, even a wheelchair having a cross structure can be sufficiently folded as before.

A twelfth aspect of the invention is the wheelchair in which the elastic body is either a coil spring or rubber.

Any elastic body may be used as long as it can have a tension between the pivot point A and the pivot point D, but in view of availability, price, durability and the like, a coil spring or rubber is used. Is preferably used.

The invention of claim 13 is a wheelchair comprising a dolly and a pedestal, wherein the dolly is from claim 1 to claim 1.
The obstacle overcoming device according to any one of 3 to 3, wherein the pedestal includes a foot portion, a seat portion, and a back portion, and the pedestal includes all of the foot portion, the seat portion, and the back portion, or It is a wheelchair in which the angle can be changed and fixed at a desired angle at a part of the connecting portions, and the entire pedestal can be horizontally arranged.

According to the thirteenth aspect of the present invention, the angle of the wheelchair can be freely changed, and the wheelchair can be moved like a bed, for example. Further, when the angle is changed and there is a risk of falling over such as when rolling over obstacles, there is a risk of overturning, but by equipping the wheelchair with an obstacle climbing device, It is possible to avoid it.

According to a fourteenth aspect of the present invention, the foot portion includes a foot plate portion and a footrest portion, the back portion includes a backrest portion, a slide stroke portion and a headrest mat portion, and the pedestal and the dolly are It is a wheelchair that can be separated.

A fifteenth aspect of the invention is a wheelchair in which the pedestal is movable back and forth along a trolley frame.

A sixteenth aspect of the present invention is a wheelchair in which the pedestal is movable left and right along a frame disposed on the pedestal seat lower carriage frame in a direction perpendicular to the pedestal.

According to a seventeenth aspect of the present invention, an elevator is provided on the carriage, and a tip of the elevator is connected to a slide frame,
In the wheelchair, the pedestal can be moved up and down by vertically moving the elevator via the slide frame.

The invention of claim 18 is a wheelchair in which the slide stroke portion can be moved forward and backward, left and right, or forward and backward and left and right in the backrest portion.

According to the fourteenth to eighteenth aspects of the present invention, it becomes possible to separate the pedestal and the dolly and move them in the front-rear direction, the left-right direction, and the front-rear direction. This improves flexibility of the positional relationship between the pedestal and the carriage.

According to a nineteenth aspect of the present invention, in a bathtub for bathing, one end of the bathtub is arranged to be openable and closable, and an introduction member for introducing a pedestal of a wheelchair is provided at a head (front part) and a bottom part. An inlet bathtub in which a water passage is arranged in the bathtub, hot water can be discharged from the water passage to the inside of the bathtub, and a lift is arranged in the lower portion of the bathtub to move the entire bathtub up and down. A bathing system comprising the wheelchair according to any one of claims 13 to 18.

The invention according to claim 20 is a bath vehicle which is equipped with the bathtub and water supply equipment for supplying water to the bathtub and discharge equipment, and which is configured to be transportable and bathable. A box arranged at the rear of the bath car so that it can be taken in and out by an introduction member, a lift for transferring the wheelchair to the bath car, and one on the ceiling of the bath car for taking the box in and out, and A bathing system comprising a wheelchair having two rails on the bottom of the vehicle and the wheelchair according to any one of claims 13 to 18.

According to the nineteenth and twentieth aspects of the present invention, it is possible to provide a bathtub that can be used as a wheelchair and a bath car equipped with the bathtub, which does not require a large number of caregivers as in the conventional case, and is relatively free. It is a handy facility that does not require a large working space and allows people to bathe directly to the bathtub for bathing.

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of a wheelchair equipped with an obstacle overcoming device of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a wheelchair 10a of a caregiver operation type.
2 is a perspective view of the wheelchair 10 shown in FIG.
It is a sectional view of II-II of a.

The wheelchair 10a includes a chair frame 20, which constitutes the outer shape of the wheelchair, a handle 25 extending upward from the chair frame 20, and a pair of left and right main wheels 30 rotatably fixed to the lower rear portion of the chair frame 20, A pair of left and right front wheels 35 pivotally fixed to the lower part of the front portion of the chair frame 20, a seat portion 40 fixed to the upper portion of the chair frame 20, and a backrest portion 45 provided between the left and right handles 25. , An obstacle overcoming device 50 provided below the seat portion 40 in the frame shape of the chair frame 20. In the present embodiment, a case where the wheelchair 10a having the simplest structure is provided with the obstacle getting-over device 50 will be described. Therefore, each part constituting the wheelchair 10a other than the obstacle getting-over device 50 has a normal wheelchair structure. All you have to do is do it. Therefore, it goes without saying that the wheelchair 10a may be provided with ancillary functions such as, for example, the handle 25 being swingable up and down and a device for adjusting the height of the handle being provided.

The obstacle overcoming device 50 is mounted on a support frame 51 which is vertically provided in the frame shape of the chair frame 20 below the seat portion 40 so as to be oriented substantially vertically. It has a structure in which four frames including the one are pivotally connected in a quadrangle (hereinafter, quadrilateral link).

That is, in the quadrilateral link in which four frames are pivotally connected to each other in a quadrilateral shape, one end of the quadrilateral link is supported by the support frame 51.
An operation frame 52 pivotally attached to the support frame 51, an auxiliary wheel frame 53 whose one end is pivotally attached to a pivotal support point B below the pivotal support point A of the support frame 51, and one end of the operation frame 52 is pivotally attached to the operation frame 52 at a pivotal support point C and an auxiliary wheel. The frame 53 is formed of a connecting frame 54 whose one end is pivotally attached at a pivot point D, and the pivot points A, B, C and D are pivotally fixed to each other by bolts or the like. Therefore, the shape of the quadrangle of the quadrilateral link is deformable. Further, although both ends of the connecting frame 54 are the pivot fulcrums C and the pivot supporting points D, the pivots C and the pivot supporting points D may be provided on the connecting frame 54 not at both ends.

One or more auxiliary wheels 55 are rotatably fixed to the auxiliary wheel frame 55 rearward of the pivot point D.

A footrest 52a is provided at one end of the operation frame 52 rearward of the pivot point C so that a caregiver can operate the obstacle crossing over device 50.

Further, an elastic member 56 is interposed between the pivot points A and D, and is biased so that the pivot point D approaches the pivot point A for operation. It acts to hold the frame 52 and the auxiliary wheel frame 53 rearward, that is, the footrest 52a and the auxiliary wheel 55 upward. The operation frame 52 is appropriately locked to the chair frame 20 so that the operation frame 52 does not rise above a certain level in its raised position. The elastic body 56 may be made of any material having elasticity such as a coil spring or rubber, but the coil spring or rubber is preferable in terms of availability and durability.

In addition, a plurality of pivot holes 53a are formed in the auxiliary wheel frame 53, and the movement locus of the auxiliary wheel 55 is changed by selecting and supporting the pivot point D and the auxiliary wheel 55. It may be possible.

As a matter of course, since the front wheels 35 are levitated by the auxiliary wheels 55 contacting the ground, as shown in FIG. 2, the distance L ₁ from the pivot B to the ground is perpendicular to the ground.
And the distance L ₂ from the pivot point B to the outer diameter of the auxiliary wheel is L ₁ <L ₂ .

[0054]

EXAMPLE An operation mode of the wheelchair 10a having the obstacle overcoming device 55 will be described below. Before using the wheelchair 10a, an obstacle overcoming device 50 is provided in the lower portion of the seat portion 40 and inside the chair frame 20.

The user of the wheelchair 10a is seated on the seat 40, and the caregiver is positioned behind the wheelchair 10a and the handle 2
Handshake 5 and push wheelchair 10a to run.

During the traveling process of the wheelchair 10a, the front wheel 35 may come into contact with the stepped portion Z as shown in FIG. In this case, since the front wheels have a small auricular diameter, it may not be possible to easily get over depending on the height of the stepped portion Z.

In such a case, the caregiver operates the operation frame 5
The operation frame 52 descends by pressing the second footrest 52a downward with a foot or a hand and rotating it. Operation frame 5
With the descending of 2, the pivot point C descends, and accordingly, the pivot point D also descends. Therefore, the auxiliary wheels 55 provided on the auxiliary wheel frame 53 also descend. As the auxiliary wheel 55 descends, the auxiliary wheel 55 contacts the ground. A diagram in this case is shown in FIG.

From this grounded state, the footrest 52a of the operation frame 52 is further pressed downward and rotated, whereby the auxiliary wheel 55 comes into contact with the ground and the front wheel 35 floats. At this time, the wheelchair 10a is appropriately tilted rearward so that the front wheel 3
By slightly floating 5, the operation frame 52 can be easily pushed downward, and the height of the stepped portion Z of the front wheel 35 can be easily lifted.

By pressing the footrest 52a downward in this manner, the front wheel 35 floats above the step Z, and the wheelchair 10a is supported by the main wheel 30 and the auxiliary wheel 55. A diagram in this case is shown in FIG.

Further, in the state where the front wheels are levitated as shown in FIG. 4, the pivot point D of the quadrilateral link is located below, and further forward of the imaginary line connecting the pivot points A and B. It will be locked and fixed so as to be located (on the right side in the sectional view). Therefore, in the imaginary line α connecting the fulcrum A and the fulcrum B and the imaginary line β connecting the fulcrum A and the fulcrum D, the imaginary line β must be located in front of the imaginary line α (on the right side in the sectional view). Becomes In this state, the tension of the elastic body 56 connecting the pivot point A and the pivot point D prevents the obstacle overcoming device 50 from returning to the state shown in FIG.

When the wheelchair 10a is pushed further forward from the state shown in FIG. 4, the auxiliary wheel 55 is prevented from moving forward by the step portion Z, and the auxiliary wheel 55 acts so as to move backward. That is, at the moment when the pivot point D is located behind the imaginary line α (that is, the imaginary line β is the imaginary line α) (on the left side in the cross-sectional view), the obstacle overcoming device 50 is automatically operated along with the change in the tension direction of the elastic body 56. To go backwards. Further, the front wheel 35 is in contact with the upper part of the stepped portion Z, and the auxiliary wheel 55 is separated from the ground. This state is shown in FIG.

When the wheelchair 10a is further pushed forward and moved forward, the main wheel 30 comes into contact with the stepped portion Z. However, since the main wheel 30 has a larger wheel diameter than the stepped portion Z, there is a step difference. It is possible to easily get over the section Z and move forward.

As described above, when the rider climbs over the stepped portion Z with the wheelchair 10a, the caregiver only pushes down the footrest portion 52a of the operation frame 52 and does not require any further operation, and easily rides over the obstacle. Is possible.

That is, the auxiliary wheel 55 of the obstacle passing device 50.
Although the caregiver operates the feet with a foot or a hand, the auxiliary wheels 55 can be automatically lifted after the obstacle is overcome by the tension of the elastic body 56.

[0065]

Second Embodiment Next, a wheelchair 10b of a user operation type
The case will be described. 6 to 9 are sectional views of the wheelchair 10b. The wheelchair 10b has the same configuration as that of the first embodiment except that the operation lever 52b is arranged at the lower front portion of the seat 40 so that the user can operate the obstacle overcoming device 50 while sitting on the seat 40. . However, in some cases, the footrest 52a may not be provided at the rear end of the pivot point C of the operation frame 52.

The operation lever 52b is formed integrally with the operation frame 52 or is integrally joined to the operation frame 52. In the running process of the wheelchair 10b,
As shown in FIG. 6, the front wheel 35 may come into contact with the stepped portion Z. In this case, since the front wheels have a small auricular diameter, it may not be possible to easily get over depending on the height of the stepped portion Z. In that case, as shown in FIG. 7, the user sitting on the seat portion 40 extends his or her hand downwards and pulls up the operation lever 52b, and moves the center of gravity of the user a little backward. The auxiliary wheel 55 will be grounded. When the operating lever 52b is further pulled up from this state, the front wheels 55 are in a state of being lifted above the height of the stepped portion Z, as shown in FIG.

In the state shown in FIG. 8, the user sitting on the seat portion 40 rotates the operating hand rim mounted on the side portion of the outer peripheral portion of the main wheel 30 to move the wheelchair 10b forward. Since the advancement of the auxiliary wheel 55 is blocked by the step portion Z, the auxiliary wheel 55 acts so as to move relatively rearward. That is, at the moment when the pivot point D is located behind the imaginary line α (that is, the imaginary line β is the imaginary line α) (on the left side in the cross-sectional view), the obstacle overcoming device 50 is automatically operated along with the change in the direction of the tension of the elastic body 56. To go backwards. Further front wheel 3
5 is in contact with the upper part of the stepped portion Z, and the auxiliary wheel 55 is separated from the ground. This state is shown in FIG.

When the wheelchair 10b is further pushed forward and moved forward, the main wheel 30 comes into contact with the stepped portion Z. However, since the main wheel 30 has a larger wheel diameter than the stepped portion Z, there is a step difference. It is possible to easily get over the section Z and move forward.

Further, in the operation lever 52b, a user's grip portion 52c (FIG. 6) is provided, the grip portion 52c can be expanded and contracted, and the grip portion 52c is mounted inside the operation lever 52b. Elastic body 52, etc.
By making it extend against the d, the grip portion 52c is extended when the operation lever 52b is operated to facilitate the operation, and when the operation is completed, the grip portion 52c is released when the hand is released. 52c is automatically compressed by the tension of the elastic body 52d and returns to the original state. By using such an operation lever 52b, it is possible to prevent the operation lever 52b protruding to the front part from interfering with the user.

[0070]

Third Embodiment When the obstacle getting-over device 50 is mounted on the wheelchair 10a and the wheelchair 10b, a supporting frame 51 is provided below the seat portion 40 and the obstacle getting-over device 50 is mounted there. In the case of a wheelchair having such a structure, since the seat portion 40 and the support frame 51 need to be joined, the seat portion 40 needs to be made of a hard material such as a plate, iron or aluminum. However, in an ordinary wheelchair, the backrest portion 45 and the seating portion 40 may be made of cloth or the like for the purpose of improving comfort when sitting and for convenience of folding. In such a case, it is difficult to provide the support frame 51 below the seat portion 40 as shown in the first and second embodiments.

Therefore, in the present embodiment, the obstacle overcoming device 50 is mounted on the wheelchair 10c in the case of the seat portion 40c and the backrest portion 45c which are made of a soft material such as cloth.
The case of mounting is explained. FIG. 10 shows a perspective view of the wheelchair 10c when the support frame 51 vertically arranged and fixed in the frame shape of the chair frame 20 below the seat portion 40c cannot be mounted. In addition, the wheelchair 1 is shown in FIG.
0c shows a front view.

The wheelchair 10c includes a chair frame 20 which forms the outer shape of the wheelchair, a handle 25 extending upward from the chair frame 20 to the rear, and a pair of left and right main wheels 30 pivotally fixed to the lower rear of the chair frame 20. Between the pair of left and right front wheels 35 pivotally fixed to the lower front portion of the chair frame 20, a seat portion 40c made of a soft material such as cloth provided on the upper portion of the chair frame 20, and the left and right handles 25. The backrest portion 45c is made of a soft material such as cloth and is provided with an obstacle overcoming device 50 and a crossing frame 60 which are provided in the frame shape of the chair frame 20 below the seat portion 40c. 12
FIG. 11 is a sectional view of the wheelchair 10c taken along the line II-II.

The transverse frame 60 is arranged laterally within the frame shape of the chair frame 20, and is preferably joined in parallel with the front surface.

The obstacle overcoming device 50 is mounted on the transverse frame 60, and the support frame 51 is joined to the transverse frame 60. In the obstacle overcoming device 50, four frames including a support frame 51 are quadrangular links. This quadrilateral link is the same as in the first and second embodiments, and therefore its explanation is omitted. That is, the support frame 51, the operation frame 52, the auxiliary wheel frame 53, and the connection frame 54
Further, an elastic body 56 is interposed and locked between the pivot point A and the pivot point D.

Next, a caregiver operation type operation mode of the wheelchair 10c having the obstacle overcoming device 50 will be described. Before using the wheelchair 10c, the transverse frame 6 is placed in the frame shape of the chair frame 20 below the seat portion 40c.
0 is arranged, and the obstacle overcoming device 50 is joined to the transverse frame 60.

The user of the wheelchair 10c sits on the seat portion 40c, and the caregiver is positioned behind the wheelchair 10c and shakes the handle 25 to push the wheelchair 10c to run.

In the running process of the wheelchair 10c, FIG.
The front wheel 35 may come into contact with the stepped portion Z as shown in FIG. In this case, since the front wheels have a small auricular diameter, it may not be possible to easily get over depending on the height of the stepped portion Z.

In such a case, the caregiver operates the operation frame 5
The operation frame 52 descends by pressing the second footrest 52a downward with a foot or a hand and rotating it. Operation frame 5
With the descending of 2, the pivot point C descends, and accordingly, the pivot point D also descends. Therefore, the auxiliary wheels 55 provided on the auxiliary wheel frame 53 also descend. As the auxiliary wheel 55 descends, the auxiliary wheel 55 contacts the ground. A diagram in this case is shown in FIG.

From this grounded state, the footrest 52a of the operation frame 52 is further pressed downward and rotated, whereby the auxiliary wheel 55 comes into contact with the ground and the front wheel 35 floats. At this time, the wheelchair 10c is appropriately tilted rearward so that the front wheel 3
By slightly floating 5, the operation frame 52 can be easily pushed downward, and the height of the stepped portion Z of the front wheel 35 can be easily lifted.

By pressing the footrest 52a downward in this manner, the front wheel 35 floats above the step Z, and the wheelchair 10c is supported by the main wheel 30 and the auxiliary wheel 55. A diagram in this case is shown in FIG.

Further, in the state in which the front wheels are levitated as shown in FIG. 14, the pivot D of the quadrilateral link is in a state of being located below, and further forward of the virtual line connecting the pivot A and the pivot B. It will be locked and fixed so as to be located (on the right side in the sectional view). Therefore, in the imaginary line α connecting the fulcrum A and the fulcrum B and the imaginary line β connecting the fulcrum A and the fulcrum D, the imaginary line β must be located in front of the imaginary line α (on the right side in the sectional view). Becomes In this state, pivot point A and pivot point D
By the tension of the elastic body 56 connecting with, the obstacle overcoming device 50 is prevented from returning to the state shown in FIG.

When the wheelchair 10c is further pushed forward from the state of FIG. 14 to move it forward, the auxiliary wheel 55 is prevented from moving forward by the step portion Z, and the auxiliary wheel 55 acts so as to move backward. That is, at the moment when the pivot point D is located behind the imaginary line α (that is, the imaginary line β is the imaginary line α) (on the left side in the cross-sectional view), the obstacle overcoming device 50 is automatically operated along with the change in the direction of the tension of the elastic body 56. To go backwards. Further, the front wheel 35 is in contact with the upper part of the stepped portion Z, and the auxiliary wheel 55 is separated from the ground. This state is shown in FIG.

When the wheelchair 10c is further pushed forward and moved forward, the main wheel 30 comes into contact with the stepped portion Z. However, since the main wheel 30 has a larger wheel diameter than the stepped portion Z, It is possible to easily get over the section Z and move forward.

As described above, when the rider climbs over the stepped portion Z with the wheelchair 10c, the caregiver only pushes down the footrest portion 52a of the operation frame 52 and does not require any further operation, and easily rides over an obstacle. Is possible.

That is, the auxiliary wheel 55 of the obstacle passing device 50.
Although the caregiver operates the feet with a foot or a hand, the auxiliary wheels 55 can be automatically lifted after the obstacle is overcome by the tension of the elastic body 56.

[0086]

Fourth Embodiment Since the wheelchair 10c shown in the third embodiment is of a caregiver operation type, the wheelchair 10d of the user operation type when the transverse frame 60 is provided in the wheelchair is used.
The case will be described. 16 to 19 show a wheelchair 10d
FIG. In the wheelchair 10d, the user seats 40
The configuration is the same as that of the third embodiment except that the operation lever 52b is arranged at the lower front portion of the seat portion 40c so that the obstacle overriding device 50 can be operated while sitting on c. However, in some cases, the footrest 52a may not be provided at the rear end of the pivot point C of the operation frame 52.

The operation lever 52b is formed integrally with the operation frame 52 or is integrally joined to the operation frame 52. In the running process of the wheelchair 10d,
As shown in FIG. 16, the front wheel 35 may come into contact with the stepped portion Z. In this case, since the front wheels have a small auricular diameter, it may not be possible to easily get over depending on the height of the stepped portion Z. In that case, the user sitting on the seat portion 40c extends his / her hand downward and pulls up the operation lever 52b, and moves the user's own center of gravity to the rear a little, as shown in FIG. The auxiliary wheel 55 will be grounded. From this state, the operation lever 52b is further
18 is pulled up, as shown in FIG.
5 is in a state of floating above the height of the step portion Z.

When the state shown in FIG. 18 is reached, the user sitting on the seat portion 40c rotates the operating hand rim mounted on the side portion of the outer peripheral portion of the main wheel 30 to rotate the wheelchair 10d.
When the auxiliary wheel 55 is moved forward, the auxiliary wheel 55 is prevented from moving forward by the stepped portion Z, so that the auxiliary wheel 55 acts to move relatively backward. That is, the pivot point D is behind the virtual line α (that is, the virtual line β is the virtual line α) (on the left side in the sectional view).
At the moment, when the direction of the tension of the elastic body 56 changes, the obstacle overcoming device 50 automatically returns to the rear. Further, the front wheel 35 is in contact with the upper part of the stepped portion Z, and the auxiliary wheel 55 is separated from the ground. This state is shown in FIG.

When the wheelchair 10d is further pushed forward and moved forward, the main wheel 30 comes into contact with the step portion Z. However, since the main wheel 30 has a larger wheel diameter than the step portion Z, the step It is possible to easily get over the section Z and move forward.

Further, in the operation lever 52b, a grip portion 52c (FIG. 16) of the user is provided, the grip portion 52c can be expanded and contracted, and the grip portion 52c is operated by the operation lever 52b.
Elastic body 5 such as coil spring and rubber installed inside the
By making it extend against 2d, the grip portion 52c is extended when the operation lever 52b is operated,
In addition to facilitating the operation, when the hand is released from the grip portion 52c at the end of the operation, the grip portion 52c becomes elastic body 52d.
Automatically compresses with the tension of and returns to the original state. By using such an operation lever 52b, it is possible to prevent the operation lever 52b protruding to the front part from interfering with the user.

[0091]

Fifth Embodiment In the wheelchairs 10c and 10d of the third and fourth embodiments, the cross frame 60 is the chair frame 2.
Since it is arranged laterally in the frame shape of 0, it cannot be folded as it is. Therefore, the crossing frame rotating portion 63 is provided at one of the left and right ends of the chair frame 20.
Is provided and is rotatably joined to the transverse frame 60 in the vertical direction, and a transverse frame bearing portion 65 for fitting the transverse frame 60 to the other end of the chair frame 20 is provided. A front view of the wheelchair in this case is shown in FIG. Further chair frame 2
A support pin 72 for supporting the transverse frame 60 is provided below the seat portion 40c in the frame shape of 0 and on the track when the transverse frame 60 is rotated upward by the transverse frame rotating portion 63. In the drawings of the present specification, the case where the transverse frame rotating portion 63 is provided on the left side and the transverse frame bearing portion 65 is provided on the right side in the drawing will be described. When provided, it goes without saying that the explanations thereof are correspondingly reversed.

Further, the transverse frame 60 includes a rotary joint portion 67 that is pivotally joined to the transverse frame rotating portion 63, an obstacle transit device joint portion 68 that is joined to the obstacle transit device 50, and a transverse frame. It comprises a transverse frame fitting portion 69 that keeps the transverse frame 60 horizontal by fitting it with the bearing portion 65. Further, the cross frame fitting portion 69 is mounted inside the obstacle overpass device joining portion 68,
The transverse frame 6 is constructed by a structure in which the elastic body (not shown) such as a coil spring or rubber is extended.
It is possible to perform an operation in a state where the 0 and the transverse frame bearing portion 65 are fitted (fitted state) and a state where they are out of fitted (non-fitted state). In this operation, the transverse frame fitting portion 69 is provided with the extension pin 70, and further, the obstacle overcoming device joint portion 68 is provided with the moving groove 71 for allowing the extension pin 70 to move left and right. By moving the extension pin 70 left and right along the moving groove 71, the transverse frame fitting portion 69 moves left and right, and the fitting state and the non-fitting state with the transverse frame bearing portion 65 are operated. It becomes possible.

Therefore, in order to rotate the transverse frame 60 maintained in the horizontal direction upward so as to be folded, the extension pin 70 is moved to the left, so that the transverse frame fitting portion 69 is partially obstructed. The length of the transverse frame 60 is temporarily made shorter than the width of the wheelchair by being inserted into the ride-over device joint portion 68. When the user or the caregiver holds the extension pin 70 and lifts the extension pin 70 upward, the transverse frame 60 rotates upward with the joint point X as a fulcrum.

The transverse frame 60 is pivoted to the position of the support pin 72, and the transverse frame fitting portion 69 is passed through the support pin 72 to lock the transverse frame 60 upward.
When passing the transverse frame fitting portion 69 through the support pin 72,
By moving the extension pin 70 from the left side to the right side which has been moved, the transverse frame fitting portion 69 is returned to its original position by the action of an elastic body (not shown), and the transverse frame 60 also has the original length (wheelchair). Width). Therefore, it becomes possible to lock the transverse frame 60 with the support pins 72. This state is shown in FIG.

By thus locking the transverse frame 60 upward, even when the wheelchair is folded, the transverse frame 60 rotates about the joint X as a fulcrum so that the wheelchair can be folded.

When it is desired to use the obstacle riding over apparatus 50 by unfolding the wheelchair from the folded state, the above operation may be reversed. That is, by moving the crossing frame 60 locked to the support pin 72 to the left of the extension pin 72, a part of the crossing frame fitting portion 69 is inserted into the obstacle overpassing device joint portion 68. The length of the cross frame 60 is shorter than the width of the wheelchair. In this state, the cross frame 60 is released from the engagement of the support pin 72.

Transverse frame 60 removed from support pins 72
Rotate downwards and move to just before the horizontal position.
By moving the extension pin 70 to the left, a part of the transverse frame fitting portion 69 is again inserted into the obstacle overpassing device joint portion 68 to make the length of the transverse frame 60 shorter than the width of the wheelchair. In that state, the transverse frame 60 is moved to a horizontal position, and the extension pin 70 is moved to the right, whereby the transverse frame fitting portion 69 is moved to the right and fitted with the transverse frame bearing portion 65. by this,
It is possible to keep the transverse frame 60 horizontal.
When the user or the caregiver performs such an operation, the state shown in FIG. 20 can be obtained, and the obstacle overcoming device 50 is used by performing the operation of the third or fourth embodiment. Is possible.

Further, in this state, the transverse frame 60 is simply
Can only be rotated up and down with the joint point X between the transverse frame rotating portion 63 and the rotating joint portion 67 as a fulcrum. Therefore, the obstacle riding-over device 50 exists in the center or rear of the seat portion 40c when the wheelchair is folded. However, in the case of a foldable wheelchair, the chair frame 2
0 may have a cross structure as shown in FIG. 20 below the seat portion 40c. This is a structure for making the wheelchair foldable, distributing the load of the user's weight and the like on the seat portion 40c, and increasing the strength of the wheelchair.

In the case of such a wheelchair, even when the wheelchair is folded, the obstacle overcoming device 50 has the seat portion 4
By being located in the center or rear below 0c, it may collide with the intersecting structure and may not be sufficiently folded.
In such a case, there arises a problem that the wheelchair in a folded state becomes unstable and falls, and the width of the wheelchair in the folded state becomes wide.

Therefore, the crossing structure and the obstacle overcoming device 50
In order to prevent the obstacles from colliding with each other, it is sufficient that the obstacle overcoming device 50 can be rotated forward. This case will be described below.

Obstacle overcoming device 6 of cross frame 60
The reference numeral 8 is further inserted into the rotary joint 67 so that the obstacle overcoming device joint 68 and the transverse frame fitting 69 can be rotated forward and backward.

Further, the obstacle overcoming device 68 has a projection 73.
The rotary joint portion 67 is provided with an inverted U-shaped (or U-shaped) rotation groove 74, and the protrusion 73 can be rotated back and forth along the rotation groove 74. To do so. FIG. 39 shows an obstacle overcoming device in this case.

When the wheelchair is folded, the extension pin 70 is used.
By moving the left side of the cross frame fitting part 6
By inserting a part of 9 into the obstacle overpassing device joint portion 68, the length of the transverse frame 60 is temporarily made shorter than the width of the wheelchair. When the user or the caregiver holds the extension pin 70 and lifts the extension pin 70 upward, the transverse frame 60 rotates upward with the joint point X as a fulcrum. At this time, the obstacle overpassing device joint portion 68 is further added.
Is rotated rearward along the inverted U-shape of the rotation groove 74, the protrusion 73 is moved along the inverted U-shape of the rotation groove 74, and the obstacle passing device 50 rotates forward and moves. That is, the protrusion 73 can be moved rearward by displacing the obstacle riding over device joining portion 68 to the right, and at this time, the obstacle riding over device joining portion 68 is rotated backward. By rotating the obstacle overriding device 50 including the auxiliary wheels 55 forward by rotating it backward, the obstacle overcoming device joining portion 68 is moved leftward along the rotation groove 74. As a result, the obstacle passing device 50 is fixed forward.

After the above-described process, the extension pin 70 is held while the user or caregiver holds the extension pin 70.
By moving up, the transverse frame 60 rotates upward with the joint point X as a fulcrum. Cross frame 6
The cross frame 60 is locked upward by rotating 0 to the position of the support pin 72 and passing the cross frame fitting portion 69 through the support pin 72. When the transverse frame fitting portion 69 is passed through the support pin 72, the extension pin 70 is moved from the left side to the right side so that the transverse frame fitting portion 69 is operated by an elastic body (not shown) or the like. It returns to its original position and the transverse frame 60 also returns to its original length (width of the wheelchair). Therefore, with the support pin 72, the transverse frame 60
Can be locked. Further, since the obstacle overcoming device 50 is located in front, the wheelchair can be folded in the same manner as the conventional one without contacting the cross structure of the wheelchair. FIG. 38 shows the wheelchair in the folded state.

When the user wants to use the obstacle riding over apparatus 50 by unfolding the wheelchair from the folded state, the above operation may be performed in reverse. That is, by moving the crossing frame 60 locked to the support pin 72 to the left of the extension pin 72, a part of the crossing frame fitting portion 69 is inserted into the obstacle overpassing device joint portion 68. The length of the cross frame 60 is shorter than the width of the wheelchair. In this state, the cross frame 60 is released from the engagement of the support pin 72.

Transverse frame 60 removed from support pins 72
Rotate downwards and move to just before the horizontal position.
After the movement, the obstacle overcoming device joining portion 68 is rotated forward along the inverted U-shape of the rotation groove 74 to move the protrusion 73 along the inverted U-shape of the rotation groove 74, and the obstacle override device. 50 rotates backward and moves. That is, the protrusion 73 can be moved forward by shifting the obstacle riding over device joint portion 68 to the right, and at this time, the obstacle riding over device joint portion 68 is rotated forward. By rotating the obstacle overriding device 50 including the auxiliary wheels 55 by moving it forward, the obstacle overriding device joining portion 68 is moved leftward along the rotation groove 74. As a result, the obstacle passing device 50 is fixed to the rear.

After that, by moving the extension pin 70 to the left, a part of the transverse frame fitting portion 69 is inserted again into the obstacle overpassing device joint portion 68, and the length of the transverse frame 60 is wheelchaired. Shorter than the width of. In that state, the transverse frame 60 is moved to a horizontal position, and the extension pin 70
By moving the right side of the cross frame fitting part 6
9 is moved to the right and fitted with the transverse frame bearing portion 65. This makes it possible to keep the transverse frame 60 horizontal. By performing such an operation by the user or the caregiver, the state shown in FIG. 20 can be obtained, and the obstacle overcoming device 50 can be used by performing the operation of the third or fourth embodiment. Is possible.

Further, in this specification, the elastic body 56 of the obstacle overriding device is described as being interlocked with the pivot point A, but not only the pivot point A but also the support frame 5 is supported.
1, it may be connected to the transverse frame 60. This state is shown in FIG. In this case, when the point where the elastic body 56 is interlocked with the support frame 51 or the transverse frame 60 is the pivot point E and the pivot point D, the front wheel 35 is in a floating state and the auxiliary wheel 55 is stepped. In the case of contacting the part Z, in the virtual line α connecting the pivot A and the pivot B and the virtual line γ connecting the pivot E and the pivot D, the virtual line γ is in front of the virtual line α ( It will be located on the right side). In this state, the tension of the elastic body 56 connecting the pivot E and the pivot D prevents the obstacle overriding device from returning to its original position. This state is shown in FIG.
Shown in.

When the wheelchair is further pushed forward from this state and moved forward, the auxiliary wheel 55 is prevented from moving forward by the step portion Z, and the auxiliary wheel 55 acts so as to move rearward. That is, at the moment when the pivot point D is located behind the imaginary line α (that is, the imaginary line γ is the imaginary line α) (on the left side in the sectional view), the obstacle overcoming device 5 is moved along with the direction change of the tension of the elastic body 56.
0 automatically returns to the rear. Further, the front wheel 35 can be installed above the stepped portion Z and the auxiliary wheel 55 can be kept away from the ground.

[0110]

[Sixth Embodiment] Further, the obstacle overcoming device 50 and the wheelchair equipped with the same as described above in the first to fifth embodiments have been described. However, the use of the wheelchair is limited to the bedridden elderly person, the sick person, and the leg loss. It may be used by free people.

One of the problems is to comfortably bathe such people without manpower, without using large-scale equipment, large amount of cost, etc. It is disclosed in the publication of 2001-112837. The invention disclosed in the publication is
By forming the upper part of the wheelchair like a sleeper or stretcher, it is possible to easily take a bath, a wheelchair, a bathtub that can carry a bathtub and a bathtub that can be transported, and two of these or It is a bathing system consisting of a combination of the three.

Even when using the wheelchair disclosed in the publication, it is necessary to move the wheelchair, and it is necessary to get over obstacles such as steps. Therefore, by equipping the wheelchair disclosed in the publication with the obstacle overcoming device 50 described in the first to fifth embodiments, the obstacle can be easily overridden. In particular, when the user is on his / her back like a bed, it is difficult to get over an obstacle. Therefore, it is very effective to provide the obstacle getting-over device 50 of the present invention.
A specific example in that case will be described below.

The wheelchair 100 basically comprises a pedestal 109 and a dolly 108. The dolly 108 has relatively small wheels (front wheel 16
2) A relatively large wheel (main wheel 163) is provided at the rear part, and the obstacle overcoming device 50 is further mounted. The obstacle overcoming device 50 may be mounted as in any of the first to fourth embodiments. That is, when the support frame 51 is joined downward from the pedestal 109 (Examples 1 and 2), the cross frame 60 is attached to the carriage 108.
Is provided and the support frame 51 is joined to the transverse frame 60 (Examples 3 to 5). The pedestal 109 includes a foot portion, a seat portion 106, and a back portion. The foot part is the foot plate part 10
It is preferable that the back portion includes a backrest portion 104, a slide stroke portion 103, a headrest mat portion 105, and a grip portion 107 as necessary. FIG. 22 shows its appearance.

FIG. 22 shows a typical shape when the wheelchair is used as a normal wheelchair. Wheelchair 100
Is composed of a pedestal 109 and a carriage 108. Dolly 1
08 is molded by connecting the front wheel 162 and the main wheel 163 to each other by a pipe, a U-shaped frame or the like. Pedestal 1
The upper portion 164 on which the 09 is mounted is composed of a U-shaped frame. The roller 112 attached to the pedestal is inserted into the U-shaped frame, and the frame is attached to the pedestal roller 11.
2 moves, so that the pedestal 109 is mounted on the dolly 108.
You can move yourself. Pedestal 109 to dolly 10
A lock lever 111 is provided on the upper portion 164 for fixing to No. 8. Further, a roller 117 is provided near the tip of the backrest portion 104. The roller is useful when putting the pedestal 109 of the wheelchair 100 into the bathtub 121.

As described above, the pedestal 109 has a foot portion,
The seat portion 106 and the back portion, the foot portion includes the foot plate portion 102 and the footrest portion 101, and the back portion includes the backrest portion 104 and the grip portion 1.
07, the slide stroke portion 103 and the headrest mat 105 are preferable. These have connection points 113, 114, 115, and 116 whose angles are variable and can be locked at a desired angle. The angle can be adjusted and fixed by, for example, a hinge with a lock. Since the pedestal 109 enters the water when bathing, in order to improve draining when leaving the bathtub after bathing,
It is preferable to have a mat on the net. Water should fall from between the nets and not on the mat. This state is as shown in FIG. FIG. 22
It goes without saying that it can be used as a normal wheelchair having the obstacle overcoming device 50 in the form of. On this occasion,
By appropriately placing a futon or a mat on the pedestal 109, a comfortable sitting comfort can be obtained.

FIG. 23 shows the pedestal 109 in a horizontal position. The slide stroke portion 103 is connected to the headrest mat portion 105, and the backrest portion 104 can be adjusted so that the position of the headrest mat portion 105 can be adjusted.
It is arranged so that you can enter and leave. The pedestal 109 is the dolly 10
It is possible to move on the dolly 108 via roller 112 or the like. The pedestal 109 can be used as a stretcher while the pedestal 109 of the wheelchair 100 is horizontal. That is, for example, a sick person or a bedridden person can be transported by moving the carriage 108 while lying on the pedestal 109. Therefore, during this movement, if there is an obstacle, it must be lifted in order to get over it.

However, it is very difficult to lift the front wheel 162 in a state in which such a sick person or a bedridden person is lying down, and since the front wheel 162 lacks a sense of stability, it is easy to roll over. Therefore, by using the obstacle overcoming device 50 connected to the carriage 108 by any one of the methods of the first to fifth embodiments, it is possible to easily get over the obstacle and prevent overturning. How to use the obstacle overcoming device 50 is as follows.
The description is omitted because it is the same as the first to fifth embodiments.

Also, here, the slide stroke portion 103
Is attached to the backrest portion 104 so as to be extendable and contractible, so that it can be moved back and forth. Further, by providing a groove in a portion of the slide stroke portion 103 that is connected to the backrest portion 104, and making it possible to tighten one point with a screw or the like, it is possible to move the groove back and forth, left and right, and front and back and left and right. The headrest mat portion 105, that is, the slide stroke portion 103 can be fixed by a lock 181 as shown in FIG. 33, for example.

Further, the backrest portion 104 of the wheelchair 100.
The angle can be changed according to the person on the pedestal 109 or the required work. For example, FIG. 25 shows a state in which the wheelchair 100 is put in the bathtub. The dotted line shows the state of the backrest part 104 when taking a bath, and the solid line shows the state of the backrest part 104 before putting it in the bathtub.
The grip portion 107 serves as a grip portion when taking a bath when taking a bath.

Another embodiment of the wheelchair 100 described above is shown in FIG. The structure of this wheelchair is basically the one described in FIG. 22 with the addition of functions.

The wheelchair 100 'is composed of a carriage 108' and a pedestal 109 ', and the carriage has front wheels 162 and main wheels 16'.
3 and 3 are connected by a wheelchair frame 180, and a hydraulic device 170 is installed on the wheelchair frame 180. Another truck 1
The wheelchair frame 180 of 08 'has the wheelchair 10 described above.
Like 0, an obstacle overcoming device 50 is attached.
The obstacle overcoming device 50 is provided with a wheelchair frame 180.
It is joined downward from.

The upper part of the hydraulic unit 170 is connected to the slide frame 171, and the slide frame 171 is connected.
A roller 85 provided on the pedestal 109 'is inserted into this to allow the pedestal 109' to move back and forth. The roller 85 is
It can be fixed by the lock lever 183. Since the hydraulic device 170 has a cylindrical shape, it is arranged in a rectangular cylinder case 177 in order to prevent rotation of the hydraulic cylinder. By the action of the hydraulic cylinder, the pedestal 109 'of the wheelchair 100' can be moved up and down. The height of the pedestal 109 'can be adjusted by the hydraulic lever 178. This is not limited to a hydraulic device, and an electric type elevator and the like that can be moved up and down by power or a device that is manually moved up and down can also be used. Hydraulic device 17
An enlarged view of No. 0 is shown in FIG.

The pedestal 109 'includes a foot portion and a seat portion 10
6 and a back portion, the foot portion includes a foot plate portion 102 and a footrest portion 101, and the back portion includes a backrest portion 104 and a slide stroke portion 10.
3, a headrest mat 105, and a grip portion if necessary. These can be locked at a desired angle by changing their angles at their connection points. The headrest mat 105 can move the slide portion 175 (FIG. 35) back and forth and left and right via the slide stroke portion 103. The slide stroke portion 103 can fix the headrest mat 105 at a desired position by a slide portion lock 181 in the slide portion 175.

A roller 174 is provided below the sheet portion 106.
And the roller 174 is mounted on the carriage slide frame 17
1, the seat pedestal can be moved to the left and right (up and down in the drawing) by moving along the frame 176 which is arranged at right angles to the pedestal 109 'under the seat portion 106. This portion is enlarged and shown in FIG. At this time, a lock lever 179 for locking the left and right movement is provided. As for the frame 176, the left and right frames are stopped by the front and rear frames 186, and the pedestal 1 is also attached to the carriage 108 '.
It is also not fixed to 09 'and is supported by the roller 174.

The slide frame 171 comprises a U-shaped frame, and the rollers 182, 18 are attached to the frame.
4, 185 and the like are attached, the rollers and the like are inserted into the U-shaped slide frame 171, and the rollers are moved to move the pedestal 109 ′ itself forward and backward (right and left in the drawing) on the carriage 108 ′. It can be done. A lock lever 183 is provided on the carriage 108 'to fix the pedestal 109' to the carriage 108 '(FIG. 36).

Of course, the wheelchair of the embodiment shown in FIG.
It can be used similarly to the wheelchair of the embodiment of FIG.
The wheelchair shown in FIG. 33 does not show a grip portion, but of course, a grip portion can be provided. See also FIG.
The embodiment shown in 1 has a feature that the pedestal 109 'can be moved back and forth and left and right. Also pedestal 10
9'can be moved up and down by a hydraulic device 170 or the like, and a wheelchair can be conveniently used. Pedestal 10
The movement of 9'to the left and right is particularly effective when the wheelchair 100 'is in a horizontal state and the sick person or the like is moved from the wheelchair 100' to the bed or from the bed to the wheelchair 100 '.
Further, when there is an obstacle such as a step or a sill during this movement, it is possible to easily get over the obstacle by using the obstacle getting over device 50 attached to the lower portion of the wheelchair frame 180.

Next, while in a wheelchair, enter the bathtub,
Then, the situation of taking a bath will be described. A person who takes a bath takes the backrest portion 104 slightly upward from the state of sleeping on a leveled pedestal or sitting on a wheelchair and putting the slide stroke portion 103 in the backrest portion 104 to position the head. The footrest portion 101 and the footplate portion 102 are made horizontal by shifting downward. In this state, the truck is moved to the bathtub position.

FIG. 24 shows an outline of the bathtub 121. Bathtub 1
The other end of 21, in this case the right end in the figure, is openable and closable. Rails 122 at the bottom of the bathtub 121
Is provided on the left and right, and the rails 123 are provided on the head on the left and right. At the left end of the drawing is a washing head 138 where the head of a person who bathes is located. Since this portion is at a high position, the rail 123 is provided obliquely upward from the bottom of the bath. The bottom of the bathtub 121 and the head wash 138
Drain holes 133 and 132 are provided in the. Bathtub 12
It is preferable that the water passage 128 is provided substantially at the center of the side surface of the No. 1. When introducing a wheelchair into the bathtub,
Although I am using rails, without being limited to this,
Alternatively, rollers or grooves can be used.

The water passage 128 is, for example, a stainless steel plate formed in an L shape and attached to the bathtub 121, and allows hot water to pass between the stainless steel plate and the bathtub. The plate is not necessarily made of stainless steel, but may be made of other metal such as iron or aluminum.
This plate also serves to reinforce the bath. Water passage 1
A hot water supply nozzle 129 is provided in the bathtub at 28. These are for jetting hot water from the hot water supply nozzle. The condition of the water passage 128 is shown in FIG. The bathtub 121 is mounted on the bathtub lifts 124 and 140 for moving the bathtub up and down.

FIG. 26 shows a state in which the pedestal is introduced into the bathtub 121. The pedestal roller 117 enters the rail 123, the roller 112 enters the rail 122, and the pedestal 109 is introduced into the bath 121. The grip portion 107 is to be gripped by hand when taking a bath. Dolly 1
08 is separated from the pedestal 109 and stands by under the bathtub 121. The bathtub 121 is mounted on a lift 124 and can be moved up and down to adjust the height of the bathtub according to the physiques of the person taking a bath and the caregiver to make it easier to work.

FIG. 27 shows a state in which the bathtub opening / closing section 125 is opened.
It is shown in (A). FIG. 27B shows the bottom of the bathtub 121. There are 2 rails on the bottom of the bathtub 121.
A book is provided so that the roller of the pedestal 109 can be inserted into this rail. The bath opening / closing portion 125 is opened / closed by the hinge fitting 131. Rubber packing is applied to the surface of the flange 141 so as to prevent water leakage when closed, and is locked by the lock fitting 130.

In FIG. 24, the bath opening / closing portion 125 is opened, and the pedestal 109 is mounted on the dolly 108 from the right direction toward the bath tub 121, and only the pedestal 109 is moved into the bath. The dolly 108 stands by under the bathtub while taking a bath. In FIG. 27A, the bathtub 121 is moved up and down by a bathtub lift so that the rollers 12 of the pedestal 108 on the truck 109 can be moved to the rails 122 of the bathtub 121, and the truck 108 is appropriately moved to move the truck upper part 164. Rail 122
Match the positions of. Then, the base roller 112
Can easily move to the bathtub rail 122 and put the pedestal 109 in the bathtub 121. The rail 122 can smoothly guide the pedestal 109 into the bath by setting the entrance, that is, the opening / closing section 125 at a position higher than the washing head 138.

When the pedestal 109 is put in the bathtub 121, the backrest portion 104 is set in a slightly upward position as described above (FIG. 25). The roller 117 provided near the tip of the backrest portion 104 is
3 to help the pedestal 109 enter the bathtub. The rails 122 and 123 and the dolly upper portion 164 have a U-shape, and the roller 117 is inserted into the U-shape. However, the rail 123 is L-shaped up to the middle, and the tip of the rail 123 is U-shaped.
It is easy to enter 3. Further, when the pedestal 109 is introduced into the bathtub 121, the grip 107 is washed with the head 138.
It is possible to further facilitate the movement of the pedestal 109 by reversing it and pulling it by the caregiver. Pedestal 10
When 9 is introduced into the bathtub 121, the opening / closing part 125 is closed and locked. Depending on the height of the caregiver or bather, if necessary, raise or lower the position of the bathtub lift to fix it at a position where it is easy to care for. The dolly 108 stands by under the bathtub lift.

In this way, after the pedestal 109 is introduced into the bath 121, bathing is performed as usual. A person taking a bath preferably holds the grip portion 107 in order to keep the body stable.

Next, the bath car will be described. An overall view of the bath car is shown in FIG. The bathing car 151 is equipped with a bathtub 121, hot water supply equipment, and drainage equipment, and further has a box 156 for preparing bathing such as changing clothes of a bather, and a wheelchair lift 157 for moving the wheelchair up and down to introduce the wheelchair into the bathtub 121. is doing. The box 156 is placed inside the company except when taking a bath and is pushed out of the car when taking a bath. The box 156 facilitates movement in and out of the car by a rail provided on the floor of the bath car. The rail is an introduction member, and rollers and grooves can be used in addition to the rail, and the rail is not limited to the rail. Box 156
Is an attempt to make the inside space of a small vehicle as large as possible when taking a bath. Before the bath starts, the rear gate 15 of the bath car
4 and 155 are opened and pushed out of the vehicle to be used as a bath preparation room. Change clothes, prepare for gymnastics, and take other necessary actions. In order to facilitate the movement of the box 156, two rails are provided on the floor of the bath car. Box 1 is also provided with rails on the ceiling of the bath car.
You can also help move 56.

For a bathing person, a bathing vehicle can be equipped with a bathtub or the like which is necessary for bathing and can be moved to provide a bathing service at a desired place.

When taking a bath, first, the rear gates 154 and 155 of the bath car are opened. The rear gate 154, 155
It may be a single-door or double-door type, but it is preferable to use a double-door type that can rotate 270 degrees because it is premised on taking a bath in a narrow space. The rear gate 154 of the bath car,
After opening 155, open the wheelchair lift 157 and lower it to the ground. This state is indicated by 157 ″ in FIG. 32A. The box 156 is extended outside the vehicle to expand the space. The rear gate 168 of the box 156 is lifted up and opened. In FIG. 32A, the rear gate 168 of the box is lifted up. The state raised to 168 "is shown. Move the wheelchair with the person bathing on it on the wheelchair lift 157 ″ that has been lowered to the ground.
Raise it to the 7'position and in this state put the wheelchair in box 15
Move to 6 Then, the rear gate 168 of the box 156 is closed. After preparing for changing clothes in the box 156, the backrest portion 104 of the wheelchair on which a person who takes a bath is placed is made slightly higher, for example, as shown in FIG. The lock lever 111 of the pedestal 109 is operated to unlock the pedestal 109 and the dolly 108. Eventually the pedestal top 16
The roller 112 of No. 4 is put into the rail 122, and the pedestal 10
9 is removed from the dolly and only the pedestal 109 is introduced into the bathtub 121.

FIG. 31 shows a state in which the box 156 is pushed out of the vehicle. Approximately one-third of the floor of the box is on the floor inside the car, supporting the protruding part. Further, the wheelchair lift 157 also plays a role of supporting the box 156 in a raised state after the pedestal 109 is introduced into the bathtub.

The wheelchair, the bathtub, and the bath car equipped with the obstacle overcoming device have been described above. An efficient bathing system can be formed by appropriately combining these two or three parties. A bathing system can be configured by a combination of a wheelchair, a bathtub, and a wheelchair, a bathtub, and a bath car. These bathing systems are sufficiently efficient for one caregiver to bathe the elderly, the sick, and the disabled.

[0140]

INDUSTRIAL APPLICABILITY As described above, it is possible to realize the obstacle overcoming device described in the first to sixth embodiments, the wheelchair equipped with the device, and the bathing system using the wheelchair.

In the first to fourth embodiments, it is possible to provide an obstacle passing device having a toggle structure composed of a quadrilateral link, a coil spring, an elastic body such as rubber, etc. When a carer or user easily moves the operating part in one direction with his foot or hand when he comes into contact with an obstacle such as a step in the traveling process, the auxiliary wheel of the obstacle passing device is lowered. By doing so, it becomes possible to levitate the front wheels and overcome obstacles such as steps.

After getting over the obstacle, the auxiliary wheel of the obstacle passing device can be returned to the original position by the tension of the elastic body only by moving the wheelchair forward. Therefore, it is very easy to get over the obstacle such as a step. Can be done.

Further, in the obstacle overcoming device shown in the fifth embodiment, the wheelchair itself can be folded by making the transverse frame turn upward. Further, by making the obstacle overpass device rotatable from the rear side to the front side, even if the chair frame of the wheelchair has a cross structure, contact between the obstacle overpass device and the cross structure is avoided, and the conventional width is maintained. It becomes possible to fold with.

Further, by using the wheelchair equipped with the obstacle overcoming device shown in the sixth embodiment in the bathing system, for example, even when the sick person is laid down, the vehicle is moved to the bathing vehicle while maintaining the stability. It becomes possible. Conventionally, when there was an obstacle such as a step when moving a wheelchair to a bath car, in the past, a caregiver raised the front wheel of the wheelchair while the sick person was lying down to overcome the obstacle, In particular, when it was laid down, the stability of the wheelchair was lacking and there was a danger of overturning, but by equipping the obstacle overcoming device, it is possible to easily move the wheelchair to the bath car while maintaining stability Became. Furthermore, the wheelchair itself not only has the function of a normal wheelchair, but also has the function of a stretcher, the function of taking a bath, and the pedestal can be leveled so that it can be made long according to the height of the person in the wheelchair. It has features such as adjustable height.

[Brief description of drawings]

FIG. 1 is a perspective view of a wheelchair 10a of a caregiver operation type.

FIG. 2 is a sectional view taken along the line II-II of the wheelchair 10a.

[Fig. 3] II- of the wheelchair 10a with the auxiliary wheels in contact with the ground
It is a sectional view of II.

FIG. 4 II- of the wheelchair 10a with the front wheels floating
It is a sectional view of II.

FIG. 5: Wheelchair 10 with auxiliary wheels returned to their original position
It is a sectional view of II-II of a.

FIG. 6 is a sectional view of a wheelchair 10b according to a user operation type.

FIG. 7 is a cross-sectional view of the wheelchair 10b in a state where auxiliary wheels are grounded.

FIG. 8 is a cross-sectional view of the wheelchair 10b in which the front wheels have floated.

FIG. 9: Wheelchair 10 with auxiliary wheels returned to their original positions
It is sectional drawing of b.

FIG. 10 is a perspective view of a wheelchair 10c.

FIG. 11 is a front view of the wheelchair 10c.

FIG. 12 is a sectional view of the wheelchair 10c taken along the line II-II.

[Fig. 13] II- of the wheelchair 10c in a state where the auxiliary wheels are in contact with the ground
It is a sectional view of II.

FIG. 14 II- of the wheelchair 10c with the front wheels floating
It is a sectional view of II.

FIG. 15: Wheelchair 10 with auxiliary wheels returned to their original position
It is a sectional view of II-II of c.

FIG. 16 is a cross-sectional view of a wheelchair 10d according to a user operation type.

FIG. 17 is a cross-sectional view of the wheelchair 10d in a state where auxiliary wheels are in contact with the ground.

FIG. 18 is a cross-sectional view of the wheelchair 10d with the front wheels floating.

FIG. 19 is a wheelchair 10 with auxiliary wheels returned to their original positions.
It is sectional drawing of d.

FIG. 20 is a front view of the wheelchair in which the transverse frame is vertically rotatable.

FIG. 21 is a front view of the wheelchair with the transverse frame locked upward.

FIG. 22 is a side view of a wheelchair equipped with an obstacle overcoming device 50.

FIG. 23 is a side view of a wheelchair with a pedestal horizontal.

FIG. 24 is a diagram showing an example of a bathtub.

FIG. 25 is a diagram showing the wheelchair before the bathtub is introduced.

FIG. 26 is a diagram showing the wheelchair after the bathtub is introduced.

FIG. 27 is a sectional view of a bath opening / closing portion.

FIG. 28 is a diagram showing a pedestal net.

FIG. 29 is a sectional view of a bath.

FIG. 30 is a diagram showing an example of a bath car.

FIG. 31 is a plan view showing a box portion.

FIG. 32 is a side view showing a box portion.

FIG. 33 is a diagram showing another example of a wheelchair.

FIG. 34 is a detailed view of a slide frame.

FIG. 35 is a detailed view of a slide portion.

FIG. 36 is a detailed view of a lock lever.

FIG. 37 is a diagram showing a hydraulic cylinder.

FIG. 38 is a diagram showing a folded state of a wheelchair equipped with an obstacle overpass device.

FIG. 39 is a view showing an obstacle passing over device.

FIG. 40 is a view showing a case where the elastic body 56 is interposed and locked at the pivot E.

FIG. 41 is a diagram showing a case where the elastic body 56 is interposed and locked at the pivot E, and the front wheels are levitated.

[Explanation of symbols]

10: Wheelchair 20: Chair frame 25: Handle 30: Main wheel 35: front wheel 40: Seat section 45: Back part 50: Obstacle overcoming device 51: Support frame 52: Operation frame 53: Auxiliary wheel frame 54: Connection frame 55: Auxiliary wheel 56: Elastic body 60: Crossing frame 65: Transverse frame bearing part 100: Wheelchair 108, 108 ': dolly 109, 109 ': pedestal 121: Bathtub 157, 157 ', 157 ": wheelchair lift 162: front wheel 163: Main wheel 170: hydraulic 180: Wheelchair frame

Claims (20)

[Claims] 1. A chair frame, a handle attached to the chair frame, a pair of main wheels and front wheels rotatably supported by the chair frame, and an obstacle climbing provided under the chair frame. A support frame arranged on quadrilateral links pivotally connected to each other, wherein
The support frame includes an auxiliary wheel frame, an operation frame, a connecting frame, and an elastic body. The support frame is fixedly supported on the chair frame at an upper end side thereof and vertically extends in a substantially vertical direction. Is an operation lever pivotally attached at a pivot point A at an intermediate position of the support frame, and both end sides are operation levers extended in the front-rear direction, or one end side is extended to either the rear side or the front side of the chair frame. The auxiliary wheel frame is located on a side facing the operation frame, one end side of which is pivotally attached at a pivot fulcrum B on the lower end side of the support frame, and the other end side of which extends rearward. Auxiliary wheels are rotatably supported, and one end of the connecting frame is pivotally attached to the operation frame at a pivot point C and the other end is pivotally attached to the auxiliary wheel frame at a pivot point D.
The elastic body urges the auxiliary wheel frame to be pulled upward, and the auxiliary wheel is turned to the front wheel side by the downward or upward movement of the operation lever, and after landing behind it. A wheelchair characterized by further turning or upward movement of the operation lever to further rotate to the front wheel side to float the front wheel above the auxiliary wheel. 2. A chair frame, a handle attached to the chair frame, a pair of main wheels and front wheels rotatably supported by the chair frame, and an obstacle climbing provided under the chair frame. A wheelchair comprising a device and a transverse frame arranged in the left-right direction of the chair frame, wherein the obstacle overcoming device is a support frame arranged on a quadrilateral link pivotally connected to each other, an auxiliary A wheel frame, an operation frame, a connecting frame, and an elastic body are provided, and the supporting frame has an upper end side supported by the transverse frame and is vertically laid down in a substantially vertical direction. The support frame is pivotally attached at a pivot point A at an intermediate position, and both end sides are operation levers extending in the front-rear direction, or one end side is the rear of the chair frame. Alternatively, the auxiliary wheel frame may be an operation lever extended to either the front side or the front side, and the auxiliary wheel frame is on a side facing the operation frame, and one end side of the auxiliary wheel frame is pivotally attached at a pivot fulcrum B on the lower end side of the support frame. An auxiliary wheel is rotatably supported on the other end extending rearward, one end of the connecting frame is pivotally attached to the operation frame at a pivot fulcrum C, and the other end is a supplementary wheel frame at a pivot fulcrum D. The elastic body is urged to pull up the auxiliary wheel frame upward, and the auxiliary wheel is rotated to the front wheel side by the downward or upward movement of the operation lever, and then, A wheelchair characterized in that, after landing in one direction, by further movement or upward movement of the operation lever, the operation lever is further rotated to the front wheel side to levitate the front wheel above the auxiliary wheel. 3. The obstacle overcoming device is characterized by a virtual line α connecting the pivot point A and the pivot point B in a state where the auxiliary wheels are in contact with the ground and the front wheels are levitating. Also, an imaginary line β connecting the pivot A and the pivot D or the support frame or the cross frame and the pivot D
The wheelchair according to claim 1 or 2, wherein an imaginary line γ connecting with is located in front. 4. The wheelchair according to any one of claims 1 to 3, wherein the operation lever extended to the rear has a footrest. 5. The operation lever extending forward is located below the front of the seat portion.
7. The wheelchair according to claim 5. 6. The operation lever extended to the front has an elastic body mounted therein, a grip portion is provided at one front end of the operation lever, and the elastic body is mounted to the grip portion. The wheelchair according to claim 5, wherein the grip portion is extendable. 7. The auxiliary wheel frame has a plurality of pivot support holes, and the pivot support point B and the pivot support point D are provided in any one of the pivot support holes. The wheelchair according to any one of claims 1 to 6. 8. The wheelchair includes a transverse frame rotating portion, which is joined to one of the left and right ends of the transverse frame so that the transverse frame is rotatable in the vertical direction and is joined to either the left or right of the chair frame. The cross frame bearing part is joined to a position opposite to the chair frame to which the cross frame rotating part is joined, and has a cross frame bearing part that can be fitted to the other end of the cross frame. 8. The wheelchair according to claim 7. 9. The crossing frame is joined to a turning joint part that is rotatably joined to the crossing frame turning part and to the support frame of the obstacle overpass device, and
A crossing frame fitting portion, which can be fitted to the obstacle crossing device joint portion having a V-shaped moving groove, and a part of which is inserted in the obstacle crossing device joint portion. An extension pin joined to the transverse frame fitting portion is provided in the moving groove, an elastic body is mounted inside the obstacle passing over device joint portion, and the elastic body is mounted on the transverse frame fitting portion. The wheelchair according to any one of claims 2 to 8, wherein the transverse frame fitting portion moves left and right along the movement groove by the left and right movement of the extension pin. 10. The wheelchair is the lower portion of the seat portion within the frame shape of the chair frame, and is on the track when the transverse frame is rotated upward by the transverse frame rotating portion. The wheelchair according to any one of claims 2 to 9, wherein a support pin that supports a transverse frame is joined to the chair frame. 11. The obstacle overpass device according to claim 1, wherein the rotary joint has a U-shaped or an inverted U-shaped rotation groove,
The obstacle passing over device joining portion is inserted into the rotary joining portion, and a protrusion portion joined to the obstacle passing over device joining portion is provided in the rotation groove, and the obstacle passing over device joining portion is provided in the rotation groove. The wheelchair according to claim 9 or 10, wherein the obstacle overcoming device is rotatable forward and backward by being rotatable forward and backward. 12. The wheelchair according to claim 1, wherein the elastic body is either a coil spring or rubber. 13. A wheelchair comprising a dolly and a pedestal,
The trolley includes the obstacle overcoming device according to any one of claims 1 to 12, the pedestal includes a foot portion, a seat portion, and a back portion, and the pedestal includes the foot portion and the foot portion. A wheelchair characterized in that the angle can be changed and fixed at a desired angle at all or a part of the connecting portion between the seat portion and the back portion, and the entire pedestal can be horizontally arranged. 14. The foot portion includes a foot plate portion and a footrest portion, the back portion includes a backrest portion, a slide stroke portion, and a headrest mat portion, and the pedestal and the dolly are separable from each other. The wheelchair according to claim 13, wherein: 15. The wheelchair according to claim 13, wherein the pedestal is movable back and forth along the trolley frame. 16. The pedestal is movable to the left and right along a frame arranged in a direction perpendicular to the pedestal on a pedestal seat portion lower pedestal frame, according to any one of claims 13 to 15. Wheelchair described in. 17. The pedestal is provided with an elevator, the tip of the elevator is connected to a slide frame, and the pedestal can be moved up and down by vertical movement of the elevator via the slide frame. The wheelchair according to any one of claims 13 to 16. 18. The wheelchair according to any one of claims 13 to 17, wherein the slide stroke portion is movable in the backrest portion in the front-rear direction, the left-right direction, and the front-rear direction. 19. A bath tub for bathing, the other end of which is openable and closable, and an introduction member for introducing a pedestal of a wheelchair is provided at a head (front part) and a bottom part of the bath tub. 19. An entrance bathtub in which a passage is arranged, hot water can be discharged from the water passage into the bathtub, and a lift is arranged at a lower portion of the bathtub to move the entire bathtub up and down. A bathing system comprising the wheelchair described in any one of 1. 20. A bath car equipped with the bath tub and a water supply facility for supplying the bath tub and a discharge facility, which is configured to be transportable and capable of bathing, the rear part of the bath car being provided. A box arranged so that it can be taken in and out by an introducing member, a lift for transferring the wheelchair to the bath car, and one box for taking the box into and out of the bath car and two boxes at the bottom of the car. A bathing system comprising: a wheelchair having the rail of (1) and the wheelchair according to any one of claims 13 to 18.