JP2007117722A - Walking aid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking aid, allowing a person having disabled lower limbs to stably walk by oneself safely with the same walking action, walking posture and pace as those of an ordinary person without losing balance. <P>SOLUTION: This artificial vehicle 1 includes: a fork 3 comprising a strut part 8 to which a seat 11 is mounted and an arm part 9 to which wheels 2 are fitted; a front auxiliary wheel 22 fitted to the tip of a forward auxiliary arm 21 extended to the front of the wheel 2; rear auxiliary wheels 24a, 24b fitted to the tips of rear auxiliary arms 23a, 23b extended to the back of the wheel 2; and a side auxiliary wheel 26 fitted to the tip of the side auxiliary arm 25 provided only on the left of the wheel 2. The side auxiliary wheel 26 is disposed on the disabled lower limb side, whereby even when the center of gravity of a user is shifted to the disabled lower limb side to the main wheel, the body of the user is supported by the rear auxiliary wheel 24b and the side auxiliary wheel 26 to stably walk without strolling and without losing balance of the body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a walking assistance device for a walking handicapped person, and more particularly, to a walking assistance device capable of walking in a state where a handicapped person or an elderly person is in a normal state.

Conventionally, wheelchairs, single-wheeled vehicles, walker, walking sticks, crutches, artificial limbs and the like have been widely used as walking aids for walking disabled people. These devices assist the function of the lower limbs of the disabled with the ability of the disabled and the elderly (hereinafter abbreviated as disabled) to sit, ride and lean on them. Or, it is possible to walk with a handicapped person with the assistance of an assistant. For example, in a wheelchair, a single-wheeled vehicle, a walker, etc., a disabled leg is placed on a footrest, and the wheel is rotated by a disabled person or his / her assistant's power to move in a desired direction. In addition, with walking sticks, crutches, prosthetics, etc., the disabled person's own normal parts and their devices cooperate to assist the disabled person's step-by-step walking action with occasional assistance. .
JP 2005-58672 A Japanese Patent Laid-Open No. 2003-104268 JP 2002-306552 A JP 2001-299844 Japanese Patent Laid-Open No. 9-10267

  However, in general, in walking disabled people such as hemiplegics and prosthetic limb users, when using a cane or crutch, the step length of the impaired lower limb is smaller than the step length of the normal lower limb, so the walking is slower than the normal walking motion There is a problem. In this case, if a wheelchair or a walker is used, the moving speed is secured, but the assisting device itself is large, so that a suitable space is required for movement. For this reason, there are problems such as restrictions on where to go and difficult to use at home, especially home remodeling is required for home use, and financial burden is also a problem. It becomes.

  In view of such a problem, the inventor of the present invention previously devised the walking assist device of Patent Document 1, and its compact and easy-to-handle configuration has been highly evaluated by people with walking disabilities such as lower limb disabled. On the other hand, in the case of a single wheel type walking assist device such as Patent Document 1, when a disabled person who is paralyzed and cannot move, or a disabled person who lacks one leg, there is no support to the disabled side. There is a problem that the balance is easily lost when moving, and there has been a demand for improvement.

  An object of the present invention is to provide a walking assist device that enables a walking handicapped person to safely perform a self-walking stably with the same walking motion, walking posture, and stride as a healthy person without losing balance.

  The walking assist device of the present invention includes a fork comprising a column part and an arm part extending in a forked manner from the column part, a seat attached to the upper end of the column part, and a rotatable attachment to the arm part. Provided on the front side of the fork and extending toward the front of the main wheel, a front auxiliary wheel attached to the tip of the front auxiliary arm, and provided on the rear side of the fork. A pair of rear auxiliary arms extending toward both sides obliquely rearward of the main wheel, rear auxiliary wheels attached to the tips of the rear auxiliary arms, and either the left or right side of the main wheel on the front side of the fork And a side auxiliary arm extending obliquely forward of the main wheel, and a side auxiliary wheel attached to a tip of the side auxiliary arm. .

  In the present invention, not only the auxiliary wheels are arranged before and after the main wheels, but also the side auxiliary wheels are arranged on one side of the main wheels, so that the center of gravity of the instrument user is on the main wheels. On the other hand, even when moving to the side auxiliary wheel side, the user's body is supported by the side auxiliary wheel, so that the balance of the body is not lost and stable walking without wobbling is possible.

  In addition, another walking assisting device of the present invention includes a fork comprising a column part and an arm part extending in a bifurcated manner from the column part, a seat attached to an upper end of the column part, and the arm part A main wheel rotatably attached to the fork, a front auxiliary arm provided on the front side of the fork and extending toward the front of the main wheel, a front auxiliary wheel attached to a tip of the front auxiliary arm, A pair of rear auxiliary arms provided on the rear side of the fork and extending obliquely toward both sides of the main wheel; rear auxiliary wheels respectively attached to tips of the rear auxiliary arms; and the main auxiliary wheel on the front side of the fork. A pair of side auxiliary arms provided on the left and right sides of the wheel and extending obliquely forward of the main wheel; and side auxiliary wheels respectively attached to the ends of the side auxiliary arms. And wherein the Rukoto.

  In the present invention, not only the auxiliary wheels are arranged before and after the main wheel, but also the side auxiliary wheels are arranged on both sides of the main wheel, so that the center of gravity of the instrument user is inclined to any side. However, since the user's body is supported by the side auxiliary wheels, the balance of the body is not lost, and stable walking without wobbling becomes possible.

  In the walking aid, when connected to the axle of the wheel and imparted with rotation in one direction, the rotation is transmitted to the axle, and when rotational in the other direction is imparted, the wheel rotates idly with respect to the axle. A clutch means, and an operating rod connected to the clutch means, wherein the wheel is rotated via the clutch means by an operation in one direction, and the clutch means is idled in an operation in the other direction. May be. In this case, by operating the operating rod connected to the clutch means, it is possible to control the rotation of the wheel and drive the wheel in accordance with the user's walking motion. Thereby, even if it is a walking handicapped person, the same stride as a normal pedestrian can be ensured, and the stable walk without wobbling is attained at the moving speed comparable to normal walking.

  In the walking aid, a handle that can be gripped by a user of the walking aid may be provided below the seat. By using this handle, the user lifts the walking aid, reduces the load applied to the caster, and the main wheel is in contact with the ground. Even when facing the direction, the walking aid can be easily rotated around the main wheel. For this reason, it is possible to easily handle walking aids even in a narrow corridor or the like, and it is possible to remove the movement barrier of the user and improve the degree of freedom of activity.

  Furthermore, in the walking assist device, lower end positions of the front auxiliary wheel, the rear auxiliary wheel, and the side auxiliary wheel may be arranged at a position higher than a ground contact position of the main wheel. As a result, when the user sits on the seat provided at the upper end of the column and the main wheel is pushed by the weight of the user and the vehicle height is lowered, the auxiliary wheels are grounded to be in an optimal use state. For this reason, the movement of each auxiliary wheel is maintained smoothly, and even when there are obstacles such as pebbles, the auxiliary wheel easily rotates and can be avoided without difficulty. Also, when climbing over a level difference, when the user stands up and lifts the front part of the walking aid, at least one of the rear auxiliary wheels touches down, so the grounded auxiliary wheel serves as a fulcrum, and the walking aid The front part can be easily lifted.

  On the other hand, the walking aid may be used as a walking aid for a person with lower limb disorder who has trouble with one leg. The walking assist device can be arranged not only in the front and rear, but also on the side of the disabled leg, so it is ideal as a walking assist device for people with disabilities in the lower limbs. Therefore, it is possible to safely perform a self-powered walking that is stable with the same walking motion, walking posture, and stride as that of a healthy person.

  According to the walking assist device of the present invention, a fork comprising a column portion to which a seat is attached and an arm portion to which a main wheel is attached, and a front auxiliary attached to the front auxiliary arm tip extending toward the front of the main wheel. A wheel, a rear auxiliary wheel attached to the tip of the rear auxiliary arm extending toward the rear of the main wheel, and a side auxiliary wheel attached to the tip of the side auxiliary arm provided only on either the left or right side of the main wheel Since the auxiliary wheel is arranged not only before and after the main wheel but also on one side of the main wheel, for example, when a person with lower limb disability uses the walking aid, By arranging this side auxiliary wheel, the user's body is supported by the side auxiliary wheel even if the center of gravity of the user moves to the lower leg side with respect to the main wheel. For this reason, the balance of the body is not lost and stable walking without wobbling is possible, and even a person with difficulty in walking can safely secure a moving speed equivalent to that of normal walking with a smooth walking motion.

  In addition, according to another walking assist device of the present invention, a fork comprising a column portion to which a seat is attached and an arm portion to which a main wheel is attached, and attached to the front auxiliary arm tip extending toward the front of the main wheel. Forward auxiliary wheels, rear auxiliary wheels attached to the tip of the rear auxiliary arm extending toward the rear of the main wheel, and side auxiliary wheels attached to the tip of the side auxiliary arms provided on the left and right sides of the main wheel Since the auxiliary wheels are arranged not only before and after the main wheels but also on both sides of the main wheels, even if the user's center of gravity tilts to the left or right side, the user's body is the side auxiliary wheels Supported by. For this reason, the balance of the body is not lost and stable walking without wobbling is possible, and even for elderly people such as elderly people, it is possible to safely secure the same speed of movement as normal walking with smooth walking motion. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a prosthetic vehicle (walking aid) that is Embodiment 1 of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. The prosthetic wheel 1 according to the present invention has a unicycle structure in which auxiliary wheels are arranged on the front and back as shown in FIGS. It is configured for use by people with lower limb disabilities (walking disabled) who have problems with their left foot. In this application, the upper side in FIG. 3 is referred to as the front, the lower side is referred to as the lower side, the left direction in FIG. 3 is referred to as the left side, and the right direction is referred to as the right side.

  The prosthetic wheel 1 has a configuration in which a wheel (main wheel) 2 is rotatably supported by a fork 3. A bicycle wheel is used as the wheel 2, and a rubber tire 5 is attached to the outside of an annular metal rim 4. An axle 6 is provided at the center of the wheel 2, and spokes 7 are attached radially from the axle 6 toward the rim 4. The axle 6 and the rim 4 are integrated via the spoke 7, and the wheel 2 rotates together with the axle 6. Here, the wheel 2 having a rim 4 with a diameter of 14 inches is used.

  The fork 3 is formed of a metal pipe having a diameter of 30 mm, and is composed of a tubular support portion 8 and an arm portion 9 formed to project from the support portion 8 in a bifurcated manner. A tubular scorer 10 is fitted to the upper end of the support column 8 so as to be movable up and down. A seat 11 is fixed to the upper end of the square 10, and a disabled person (user) sits on the seat 11. The height of the sheet 11 can be appropriately adjusted (about 700 to 800 mm from the ground) by a height adjusting lever 12 provided in the square 10. A turning handle 13 is attached to the rear end side of the seat 11.

  The arm portion 9 of the fork 3 is provided with two arms 9a and 9b. An axle 6 is rotatably supported on the arms 9a and 9b by a bearing (not shown), and a wheel 2 is disposed between the arms 9a and 9b. On the other hand, a free wheel (clutch means) 14 is attached to the arm 9a. The freewheel 14 is a one-way clutch used for a bicycle rear wheel or the like, and transmits the rotation to the axle 6 when rotation in one direction is applied, and the axle when rotation in the other direction is applied. I'm idling against 6

  Arms 15 a and 15 b extending in the front-rear direction are attached to the axle 6. A lever (operating rod) 16 is attached to the tip of the arm 15a. The lever 16 is formed in a rod shape, and a T-shaped grip 17 is provided at the tip thereof. Here, the lever 16 is provided on the arm 15a side assuming a right-handed user. However, the lever 16 can be provided on the arm 15b side for left-handed use, and provided on both the arms 15a and 15b. May be. Further, as the grip 17, not only a T-shaped shape but also a spherical grip can be used.

  A sleeve 18 is attached to a substantially central portion of the lever 16 so as to be movable in the vertical direction. One end side of a support arm 19 is attached to the sleeve 18. The support arm 19 is formed of a metal band plate, and the other end is attached to the fork support column 8. The lever 16 is supported by the fork support column 8 by the support arm 19 so as not to fall in the front-rear direction.

  A front auxiliary arm 21 formed of a metal pipe is attached to the front side of the fork 3. The front auxiliary arm 21 extends in front of the wheel 2 and extends downward in front of the wheel 2. A front auxiliary wheel 22 is attached to the tip of the front auxiliary arm 21. The front auxiliary wheel 22 is formed of a caster, and is attached to the front auxiliary arm 21 so as to be rotatable by 360 °.

  On the rear side of the fork 3, rear auxiliary arms 23a and 23b formed of metal pipes are attached. The rear auxiliary arms 23 a and 23 b are extended in a pair on the rear side of the wheel 2 and extend downward on both sides of the wheel 2 obliquely rearward. Rear auxiliary wheels 24a and 24b are attached to the tips of the rear auxiliary arms 23a and 23b. The rear auxiliary wheels 24a and 24b are formed of casters and are attached to the rear auxiliary arms 23a and 23b so as to be rotatable by 360 °.

  A side auxiliary arm 25 formed of a metal pipe is further attached to the front left side of the fork 3. The side auxiliary arm 25 is provided only on either the left or right side of the wheel 2 (here, the left side), and extends downward on one side of the wheel 2 diagonally forward. A side auxiliary wheel 26 is attached to the tip of the side auxiliary arm 25. The side auxiliary wheels 26 are also formed of casters, and are attached to the side auxiliary arms 25 so as to be able to rotate 360 °.

  In the prosthetic vehicle 1, a caster having a wheel having a larger diameter (for example, a diameter of 150 mm) than the rear auxiliary wheel 24 a on the rear left side is used for the rear auxiliary wheel 24 b on the left rear side of the wheel 2. The side auxiliary wheels 26 are small-diameter wheels (for example, 120 mm in diameter) having the same diameter as the rear auxiliary wheels 24a, and the front auxiliary wheels 22 are large-diameter wheels having the same diameter as the rear auxiliary wheels 24b. Is done. Further, as shown in FIG. 2, the lower end position P of the front auxiliary wheel 22, the rear auxiliary wheels 24a and 24b, and the side auxiliary wheel 26 is smaller than the ground contact position Q of the wheel 2 in the free state by a dimension h (for example It is arranged at a high position by about 30mm).

  Such a prosthetic wheel 1 is used as follows. FIG. 4 is an explanatory diagram showing a use state of the prosthetic wheel 1. As shown in FIG. 4, the user sits on the seat 11 and uses the prosthetic vehicle 1 with a healthy right foot on the ground. The height position of the seat 11 is adjusted in advance according to the physique of the user, and is a height that can be straddled over the seat 11 without excessive stretching. Since the prosthetic wheel 1 is provided with auxiliary wheels 22, 24a, 24b, and 26 on the front, rear, left and right sides, it does not fall down to the left and right like a unicycle and can be easily seated and used by persons with lower limb disabilities. At the time of sitting, the lever 16 is used as a grip bar to prevent the movement of the prosthetic wheel 1.

  When the user sits on the seat 11, the wheel 2 is pressed by the weight of the user and sinks, and the auxiliary wheels 22, 24 a, 24 b, 26 arranged above the dimension h are grounded. Thus, by setting each auxiliary wheel 22, 24a, 24b, 26 to be floating from the ground, the user can sit down compared to the case where the wheel 2 and each auxiliary wheel 22 are set at the same height. When this happens, the load applied to each auxiliary wheel 22, 24a, 24b, 26 decreases. For this reason, the movement of the casters such as the auxiliary wheels 22 is kept smooth, and even when there are obstacles such as pebbles, the casters can be easily rotated and can be avoided without difficulty. Further, when the user gets over the step, when the user stands up and lifts the front portion of the prosthetic wheel 1, at least one of the rear auxiliary wheels 24a and 24b is grounded. Therefore, the grounded auxiliary wheels 24a and 24b serve as fulcrums, and the front portion of the prosthetic vehicle can be easily lifted.

  In the prosthetic wheel 1, no auxiliary wheel is provided on the right side, and the healthy lower limb side supports the body with its own foot. On the other hand, the non-free leg side is supported by the side auxiliary wheel 26 and the rear auxiliary wheel 24b, so that the balance of the body is maintained even if the lower leg does not land. In this state, when the user kicks the right foot, the prosthetic wheel 1 moves forward (or backward). Further, when the lever 16 is pushed down at the timing of depressing the left foot (disturbed lower limb), the axle 6 rotates due to the clutch action of the free wheel 14 and the prosthetic wheel 1 moves forward by the lever operation.

  After depressing the lever 16, the lever 16 is pulled back upward while the right foot is stepped on. At this time, the free wheel 14 idles with respect to the axle 6, and the lever 2 is pulled back to the original position without the wheel 2 rotating in the reverse direction. After the lever 16 is returned, if it is pushed down at the timing of stepping on the left foot again, the prosthetic wheel 1 moves forward by that amount. Thus, by operating the lever 16 up and down in accordance with the walking motion, the prosthetic wheel 1 moves forward instead of the user's left foot.

  Here, in movement using a unicycle, the center of gravity of the user is usually located between the wheel 2 and the right foot that has landed, but sometimes the center of gravity moves to the side of the obstacle lower limb. In a unicycle, the user may lose balance. On the other hand, in the prosthetic vehicle 1, since the obstacle leg side is supported by the side auxiliary wheel 26 and the rear auxiliary wheel 24 b, the balance of the body is not lost even if the center of gravity comes to this side, and it is stable without fluctuation. Walking is possible. That is, even if the center of gravity of the user moves to the left side of the wheel 2, the user can safely move forward together with the prosthetic vehicle 1 because it is supported by the prosthetic vehicle 1. Therefore, according to the prosthetic vehicle 1, even if it is a person with difficulty in walking, a moving speed comparable to that of normal walking can be ensured with a smooth walking motion.

  Further, when a person with lower limb disability moves without using the prosthetic wheel 1, the disability lower limb can move only to a point slightly beyond the landing point of the normal lower limb. On the other hand, when the prosthetic vehicle 1 is used, it can be moved by a distance equivalent to that of normal walking by operating its own kick foot or lever 16. That is, with this prosthetic wheel 1, the user can ensure the same stride as in normal walking.

  By the way, when you move in the prosthetic vehicle 1, if you want to bend at a right angle or invert 360 °, such as in the corner of a hallway or in front of a wash basin, or when you can't easily back up due to a dead end, use only healthy lower limbs. It may be difficult to bring the prosthetic wheel 1 into a desired state. For example, when it is desired to reverse the prosthetic wheel 1, if each auxiliary wheel is in contact with the ground, the prosthetic wheel 1 is difficult to rotate depending on the direction in which the caster is facing, which is a considerable burden for the lower limb disabled person. Therefore, in the prosthetic wheel 1, consideration is given to providing the turning handle 13 on the rear end side of the seat 11 and holding it by hand so that the prosthetic wheel 1 can be easily reversed.

  For example, when the prosthetic wheel 1 is reversed, the user first lifts the prosthetic wheel 1 by grasping the turning handle 13 to reduce the load applied to each auxiliary wheel (caster), so that only the wheel 2 is grounded. . As a result, the prosthetic wheel 1 is brought into substantially one-point grounding of the wheel 2 and can be easily rotated around the wheel 2 regardless of which direction the caster of each auxiliary wheel faces. And the prosthetic wheel 1 can be rotated on the spot by twisting the trunk while supporting the body with the healthy lower limbs. Even if the balance is lost at that time, each auxiliary wheel comes in contact with the ground, so that the user does not have to worry about falling down. As a result, the prosthetic vehicle 1 can be easily routed even in a narrow corridor or the like, and it is possible to remove the obstacle barrier for persons with disabilities and improve the degree of freedom of activity.

  Next, a prosthetic vehicle that is Embodiment 2 of the present invention will be described. FIG. 5 is a plan view thereof. In the second embodiment, the same members and portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The prosthetic wheel 31 of the second embodiment is configured exclusively for elderly people and the like, whereas the previous prosthetic wheel 1 is intended for persons with lower limb disabilities.

  The prosthetic vehicle 31 of the second embodiment also has a unicycle structure in which auxiliary wheels are arranged on the front and rear sides, but unlike the prosthetic vehicle 1 of the first embodiment, a side auxiliary wheel 32 is also attached to the front right side. In the prosthetic wheel 31, a side auxiliary arm 33 formed of a metal pipe is also attached to the front right side of the fork 3. The side auxiliary arm 33 extends downward on one side of the front side of the wheel 2 symmetrically with the side auxiliary arm 25. A side auxiliary wheel 32 is attached to the tip of the side auxiliary arm 33. The side auxiliary wheels 32 are also formed of casters, and are attached to the side auxiliary arms 33 so as to be rotatable by 360 °.

  Also in this case, the side auxiliary wheels 32 are arranged above the installation surface of the wheel 2 by a dimension h, like the other auxiliary wheels 22, 24a, 24b, and 26. Accordingly, also in the prosthetic wheel 31, when the user sits on the seat 11, the wheel 2 sinks and the auxiliary wheels 22, 24a, 24b, 26, and 32 are grounded. Here, each auxiliary wheel 22 and the like are arranged in a substantially circular shape so as to surround the wheel 2, and the prosthetic wheel 31 is supported by the front and rear, left and right auxiliary wheels 22 and the like. That is, since the auxiliary wheels 26 and 32 are arranged on both front sides of the prosthetic wheel 31, the lateral stability thereof is further enhanced. For this reason, even elderly people, such as elderly people, who do not have a deficiency in both feet but have difficulty in walking, can easily walk by using this prosthetic wheel 31, and can move indoors and go out like a healthy person. Can be performed.

  Also, when a person with lower limbs who has lost one leg uses the prosthetic wheel 31, the prosthetic wheel itself is highly stable and difficult to fall down. However, the prosthetic vehicle 1 is more compact and easier to turn because there is no one side auxiliary arm 33 and side auxiliary wheel 32. Therefore, the prosthetic vehicle 1 may be easier to use for young people with disabilities. is there. In the prosthetic wheel 31 as well, since each auxiliary wheel 22, 24a, 24b, 26, 32 is set at a position higher than the wheel 2, the caster is easy to operate and it is possible to avoid obstacles such as pebbles. . Further, when the front portion of the prosthetic wheel 31 is lifted, the rear auxiliary wheels 24a and 24b serve as fulcrums, so that the front portion of the prosthetic wheel can be easily lifted and it is easy to get over steps and the like.

  In the prosthetic vehicle 31, a backrest 34 is attached to the rear side of the fork 3. The backrest 34 includes a back pipe 36 attached to the branch base 35 of the rear auxiliary arms 23a and 23b, and a backrest pipe 37 attached to the tip of the back pipe 36. The back pipe 36 extends obliquely upward from the branch base 35 and extends upward from about 150 mm to 300 mm above the upper surface of the seat 11. In addition, the back pipe 36 may be provided so as to be movable up and down similarly to the square 10 so that the position of the backrest 34 can be adjusted up and down. The backrest pipe 37 is formed to have substantially the same width as the seat 11 and is curved so that the seat 11 side is concave.

  By providing such a backrest 34, when the user stops, the user can lean on it and rest. For this reason, it is easy to take a rest as appropriate when waiting for a signal when going out or when walking a little, and it becomes possible to reduce the burden on the user.

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.
For example, in the above-described embodiment, the configuration in which the side auxiliary wheel 26 is arranged on the front left side of the seat 11 is assumed on the assumption that the user has a problem with the left foot, but in the case of a user with a problem with the right foot. The side auxiliary wheel 26 is arranged on the front right side of the seat 11. In the above-described embodiment, an example in which a large-diameter wheel is used for the rear auxiliary wheel 24b and the front auxiliary wheel 22 and a small-diameter wheel is used for the rear auxiliary wheel 24a and the side auxiliary wheel 26 has been described. You may comprise. It should be noted that the dimensions of the above-described parts and the dimensions shown in the drawings are merely examples, and it goes without saying that the present invention is not limited thereto.

  On the other hand, a footrest may be provided in the prosthetic vehicle according to the present invention so that a user's prosthetic limb or a disabled foot seated on the seat 11 can be placed thereon. Further, a brake may be provided on the wheel 2 and a brake lever for operating the brake may be attached in the vicinity of the grip 17. At this time, as a brake, a general bicycle front wheel in which two brake arms are swingably supported by a fulcrum pin can be used. In addition, a safety band may be attached to the seat 11 or the vicinity thereof in order to fix the lower back of the user seated on the seat 11. It is also possible to attach the backrest 34 to the prosthetic wheel 1 of the first embodiment.

1 is a perspective view of a prosthetic wheel that is Embodiment 1 of the present invention. It is a front view of the prosthetic wheel of FIG. It is a top view of the prosthetic wheel of FIG. It is explanatory drawing which shows the use condition of a prosthetic vehicle. It is a top view of the prosthetic wheel which is Example 2 of this invention.

Explanation of symbols

1 Prosthetic wheel (walking aid)
2 Wheel 3 Fork 4 Rim 5 Tire 6 Axle 7 Spoke 8 Strut 9 Arm 9a, 9b Arm 10 Square 11 Seat 12 Adjustment lever 13 Turning handle 14 Free wheel 15a, 15b Arm 16 Lever 17 Grip 18 Sleeve 19 Support arm 21 Front auxiliary arm 22 Front auxiliary wheel 23a, 23b Rear auxiliary arm 24a, 24b Rear auxiliary wheel 25 Side auxiliary arm 26 Side auxiliary wheel 31 Prosthetic wheel (walking aid)
32 Side Auxiliary Wheel 33 Side Auxiliary Arm 34 Backrest 35 Branch Base 36 Back Pipe 37 Backrest Pipe P Auxiliary Wheel Lower Position Q Wheel Ground Position h P-Q Dimensions

Claims (6)

A fork comprising a support column and an arm extending in a bifurcated manner from the support column;
A sheet attached to the upper end of the support column;
A main wheel rotatably attached to the arm portion;
A front auxiliary arm provided on the front side of the fork and extending toward the front of the main wheel;
A front auxiliary wheel attached to the tip of the front auxiliary arm;
A pair of rear auxiliary arms provided on the rear side of the fork and extending toward the diagonally rear sides of the main wheel;
A rear auxiliary wheel attached to the tip of each of the rear auxiliary arms;
A side auxiliary arm that is provided only on either the left or right side of the main wheel on the front side of the fork, and extends obliquely forward of the main wheel;
A walking assistance device comprising a side auxiliary wheel attached to a tip of the side auxiliary arm. A fork comprising a support column and an arm extending in a bifurcated manner from the support column;
A sheet attached to the upper end of the support column;
A main wheel rotatably attached to the arm portion;
A front auxiliary arm provided on the front side of the fork and extending toward the front of the main wheel;
A front auxiliary wheel attached to the tip of the front auxiliary arm;
A pair of rear auxiliary arms provided on the rear side of the fork and extending toward the diagonally rear sides of the main wheel;
A rear auxiliary wheel attached to the tip of each of the rear auxiliary arms;
A pair of side auxiliary arms provided on the left and right sides of the main wheel on the front side of the fork and extending obliquely forward of the main wheel;
A walking aid having a side auxiliary wheel attached to a tip of the side auxiliary arm. The walking aid device according to claim 1 or 2, wherein the walking aid device further comprises:
Clutch means connected to the axle of the wheel and transmitting the rotation to the axle when rotation in one direction is applied, and idling with respect to the axle when rotation in the other direction is applied;
An operating rod connected to the clutch means, rotating the wheel via the clutch means by operation in one direction, and causing the clutch means to idle when operating in the other direction; A featured walking aid.   The walking aid according to any one of claims 1 to 3, wherein a handle that can be gripped by a user of the walking aid is provided below the seat.   5. The walking assist device according to claim 1, wherein lower end positions of the front auxiliary wheel, the rear auxiliary wheel, and the side auxiliary wheel are arranged at a position higher than a ground contact position of the main wheel. A walking aid device characterized by being made.   The walking assist device according to any one of claims 1 to 5, wherein the walking assist device is a walking assist device for a disabled person with a lower limb having a problem with one leg.

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