JP2000210338A - Wheel device for walking aid and self-walking supporting machine provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel device for walking aid, which has a braking mechanism to be surely operated corresponding to the braking request of a user, and a self-walking supporting machine provided with the same device. SOLUTION: Concerning the wheel device for walking aid provided with a wheel 1, an axle for supporting the wheel through it and a braking means for braking the turn of the wheel, the braking means is provided with a braking ring 6 supported on the axle and rotated integrally with the wheel while having plural groove parts 8 of prescribed depth around the outer periphery thereof, a first braking pin 9 fitting the top end to the groove part, a first spring member 10 for energizing the first braking pin toward the outside of the wheel and securing a prescribed interval between the outer periphery of the braking ring and the top end of the first braking pin, a second spring member 12 abutted to the rear end of the first braking pin, a second braking pin 11 energized toward the outside of the wheel by the second spring member while having a prescribed interval to the rear end of the first braking pin, a cylinder member 15 for operating the second braking pin toward the wheel and a driving source for driving the cylinder member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel device for a walker which assists a walking operation of a person having a lower limb function or the like, and more particularly, to a walking device provided with a braking device for braking wheels. The present invention relates to a dexterous wheel device and an independent walking support device having the function of supporting not only a walking operation but also a standing and sitting operation.

[0002]

2. Description of the Related Art Conventionally, as a walking assist device for a person having a lower limb function disorder, (1) As shown in Japanese Patent Publication No. 4-26859, a brake wire brake or the like is provided on a support portion for supporting the upper body. A walking assist device provided is known.

[0003] Further, regarding a wheel device of a walker, (2)
Japanese Unexamined Utility Model Publication No. 6-41725 discloses a walker wheel that adjusts a braking force by changing a friction force between a friction member installed on a wheel surface of a wheel and a friction member installed on a fixed side by operating a lever. It had been.

[0004]

However, in the above-mentioned device (1), an accident due to instability in running or falling down, and a contact surface caused by bringing a rotation suppressing member into contact with an elastic portion (tire portion) of a wheel. There were problems such as a reduction in braking force due to wear, changes in wire tension, and the like. In the walker wheel (2), since the wheel and the friction member are always in contact with each other, the wheel and the friction member are significantly worn due to rotation, and there is a problem in durability.

[0005] The present invention has been made in view of such circumstances, has a reliable operation in response to the braking request of the user, has sufficient durability performance for a long-term use, maintenance, It is intended to provide a wheel device for a walker having a unnecessary braking mechanism and an independent walking support device provided with the device.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the invention according to claim 1 comprises a wheel, an axle penetrating the wheel and supporting the wheel, and a brake for braking the rotation of the wheel. In a wheel device for a walker provided with a means, the braking means is supported by the axle, rotates integrally with the wheel, and has a braking ring having a plurality of grooves of a predetermined depth on the outer periphery, A first brake pin fitted into the groove, and a first spring member for urging the first brake pin outward of the wheel to secure a predetermined distance between the outer circumference of the brake ring and the tip of the first brake pin. A second spring member abutting a rear end of the first brake pin; and a second brake urged outward by the second spring member toward the outside of the wheel and having a predetermined distance from the rear end of the first brake pin. A pin and a syringe for operating the second brake pin in the wheel direction. And the member, characterized by comprising a drive source for driving the cylinder member.

The invention according to claim 2 is characterized in that the spring constant of the first spring member is smaller than the spring constant of the second spring member.

The invention according to claim 3 is characterized in that the drive source is a motor, a reduction gear is provided on an output shaft of the motor, and a rotation restricting means is provided on an output shaft of the reduction gear.

According to a fourth aspect of the present invention, there is provided a frame, an elevating member provided in the frame so as to be freely inserted and withdrawn, a moving mechanism comprising a plurality of wheels provided at a lower portion of the frame, An elevating mechanism that moves the user's body up and down from a sitting position to a standing position by elevating the member, an upper limb support provided at an upper end of the elevating member, a control unit for controlling the elevating mechanism, and a user A self-sustained walking assist device provided with an operation unit for operating the walking device, wherein the moving mechanism includes the wheel device for a walker according to any one of claims 1 to 3.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a wheel device for a walker according to the present invention and an independent walking support machine provided with the device will be described.

The wheel used in the present invention is mainly composed of a tire part rolling on the ground and a wheel part fixing the tire part and rotating integrally with the tire part. By inserting a bearing into the center of the wheel, rotation can be made smooth. Also, a tire and a wheel formed integrally are known.

The axle used in the present invention penetrates the center of the wheel and supports the wheel. When a bearing is inserted into the center of the wheel, the axle penetrates the inner ring of the bearing. In addition, the axle is strong enough to withstand the overall weight of the walker or the weight of the user because the weight is applied to the axle.

The brake ring used in the present invention is provided on one side of a wheel portion of the wheel so as to be supported by the axle and rotate integrally with the wheel. Further, the outer periphery of the braking ring has a plurality of grooves having a predetermined depth. The groove portion may be provided on the outer surface, or may be provided with the opening facing the outer periphery from the opposite surface of the brake ring toward the wheel from the opposite surface.

The first braking pin used in the present invention is provided outside the outer periphery of the braking ring, and its tip has a shape smaller than that of the groove to fit into the groove of the braking ring. Needless to say.

The first spring member used in the present invention is provided to urge the first brake pin outward of the wheel and to secure a predetermined space between the outer circumference of the brake ring and the tip of the first brake pin. Therefore, normally, the tip of the first brake pin is located on the outer circumference of the brake ring by the urging force of the first spring member.
When some force is applied to the rear end of the brake pin and the first spring member contracts, the front end of the first brake pin moves in the wheel direction.

In order to perform these operations smoothly, a compression coil spring is desirable as the first spring member. Also, the first
As the shape of the braking pin, a cylindrical portion for inserting the first spring member, and a shape having a flange portion at the rear end portion larger than the first spring member to prevent the first spring member from coming off are considered. Can be Further, the distal end side does not hinder the operation of the first brake pin, and serves as a stopper for the first spring member. It is conceivable to provide a stopper having a larger flange portion.

The second spring member used in the present invention has one end abutting on the rear end of the first brake pin and urges a second brake pin, described later, toward the outside of the wheel. The second spring member is preferably a compression coil spring in relation to other members.

The second braking pin used in the present invention is usually
The rear end of the first brake pin is arranged at a predetermined distance from the rear end of the first brake pin by the urging force of the second spring member. As the shape of the second braking pin,
Similar to the first braking pin, a shape having a cylindrical portion for inserting the second spring member and a flange portion as a retaining member, a shape having a circular groove for accommodating the second spring member from the tip side, and the like are available. Conceivable. It is conceivable to provide a stopper at the rear end of the second brake pin as a stopper for the second brake pin.

In order to make each member operate smoothly, the stopper is integrated and the first brake pin, the first spring member, the second brake pin, and the second spring member are further incorporated. It is desirable to provide a case member.

The cylinder member used in the present invention is a cylinder member that linearly moves in the wheel direction or the outside direction of the wheel by some means, is located at the rear end side of the second brake pin, and operates in the wheel direction. Then, the tip of the cylinder member contacts the rear end of the second brake pin, and the second brake pin and the first brake pin move in the wheel direction. Further, when the cylinder member moves outward of the wheel, the first braking pin and the second braking pin move outward of the wheel by the urging force of the first spring member and the second spring member. At this time, the direct power when the cylinder member linearly moves in the wheel direction is the first power.
Needless to say, it is larger than the urging force of the spring member and the second spring member.

The driving source used in the present invention is a driving source for a cylinder member, and includes a motor, a solenoid, and the like. In particular, in the case of a motor, a device that converts a rotational motion into a linear motion of a cylinder member is used. Further, a large direct power can be obtained with a small current value by using a drive source from a motor via a reduction gear. Therefore,
This is more desirable than a solenoid that requires a relatively large current value to obtain the same direct power.

When a motor is used, since the operating distance of the cylinder is limited, the rotation regulating means is required mechanically, electrically, or both. Particularly useful are
The motor is prevented from being restrained by an electric rotation restricting means, and a mechanical rotation restricting means is used in consideration of a case where the electric rotation restricting means breaks down.

As the electric rotation restricting means, a magnet is provided on a rotating part of the motor, a rotating part of the reduction gear, or a part of the cylinder member, and a magnetic sensor or the like is provided at each of the movement restricting positions. It is conceivable to use a non-contact type or a contact type in which a projection is provided on a moving part, a mechanical switch is installed at each of the movement restricting positions, and the mechanical switch is opened and closed with the projection.

As the mechanical rotation restricting means, a wall is provided in a part of the moving part, and the moving part interferes with the wall to restrict the movement.

Next, a description will be given of a wheel braking mechanism using these.

When there is a braking request from the user, the motor is driven and the cylinder member moves in the wheel direction. The cylinder member moves in the wheel direction, the tip of the cylinder member contacts the rear end of the second brake pin, and the second brake pin also moves in the wheel direction. At this time, by setting the urging force of the first spring member to be smaller than the urging force of the second spring member, the first spring member contracts, and the first brake pin also moves in the wheel direction. here,
When the groove of the braking ring faces the tip of the first braking pin, the tip of the first braking pin fits into the groove, and the wheel is braked.

On the other hand, when the groove portion of the braking ring does not face the first braking pin, the tip of the first braking pin comes into contact with the outer periphery of the braking ring, and the operation of the first braking pin stops. However, since the operation of the cylinder member is not stopped, the second spring member contracts, and the second brake pin moves. Here, when the wheel slightly rotates and the groove of the brake ring faces the tip of the first brake pin, the urging force of the second spring member is set to be larger than the urging force of the first spring member. The pin moves toward the wheel, the first brake pin fits into the groove, and the wheel is braked.

On the other hand, when a braking release request is made by the user, the motor rotates in the reverse direction, and the cylinder member moves in the outer peripheral direction of the wheel. At this time, the first braking pin and the second braking pin return to the initial positions by the urging forces of the first spring member and the second spring member, and the braking of the wheels is released.

By adopting such a configuration, a braking mechanism which operates reliably in response to a braking request of a user, has sufficient durability even for long-term use, and has no maintenance is required. A wheel device for a walker can be provided.

[Embodiment] An embodiment of a wheel device for a walker according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an initial state of the wheel device for a walker of the present invention, and FIG. 2 is a longitudinal sectional view showing an initial state of the wheel device for a walker.

The wheel device for a walker according to the present embodiment comprises: a wheel 1 in which a tire portion 1a and a wheel portion 1b are integrally formed;
The vehicle includes a bearing 2 attached to the center of a wheel 1 and an axle 3 that penetrates the inner ring of the bearing 2 and supports the wheel 1. 5 supported.

A braking ring 6 is fixed to one side surface of the wheel portion 1b of the wheel 1, and a bearing 7 is attached to the braking ring 6 at the center of the opposite end of the wheel 1, and the axle 3 penetrates. . Further, a plurality of grooves 8 which are partially open to the outer periphery of the brake ring 6 are formed from the surface of the brake ring 6 opposite to the wheel 1 toward the wheel 1.

In this embodiment, the diameter of the wheel 1 is set to 100 mm, the diameter of the brake ring 6 is set to 50 mm, the groove 8 is set at a pitch of 30 °, and the braking mechanism operates by rotation of about 10 mm in terms of the wheel 1. The dimensions of the groove 8 were about 5 mm from the outer periphery toward the center, the width near the center was about 8 mm, and the depth from the surface opposite to the wheel 1 was about 8 mm.

On the other hand, the first braking pin 9 and the first spring member 1
0, the second brake pin 11, and the second spring member 12
Is provided on the center line of the surface on the side opposite to the wheel 1, is housed in the case member 13, and is fixed to the fixing plate 5 on the braking ring 6 side. The center line of each member was such that the groove 8 was substantially at the center of the depth from the surface opposite to the wheel 1. The distance between the tip of the case member 13 and the outer periphery of the brake ring 6 is about 1 mm.

The first spring member 10 has a spring constant of about 50
It is inserted into the cylindrical portion 9a of the first braking pin 9 using a gf / mm compression coil spring. The first braking pin 9 includes a cylindrical portion 9a and a flange portion 9b, and is stored in the case member 13 with the cylindrical portion 9a facing the braking ring 6. At this time, the flange portion 9b acts as a stopper. Further, a hole 13 through which the cylindrical portion 9a can pass from the tip
a, a step 13b for preventing the first spring member 10 from coming off, and a step 13c for restricting the movement of the flange 9b are formed.

As the second spring member 12, a compression coil spring having a spring constant of about 400 gf / mm is used, one end of which is in contact with the rear end of the flange portion 9b of the first brake pin 9. The second braking pin 11 is provided with a circular groove 11 a for accommodating a part on the rear end side of the second spring member 12, and the rear end is in contact with a stopper 14 provided on the case member 13.
As the stopper 14, a C-shaped retaining ring that can be inserted from the rear end opening 13d of the case member 13 is used.

With this combination, in the initial state, the distance between the tip of the first brake pin 9 and the outer circumference of the brake ring 6 is about 2 mm, and the distance between the step 13c of the case member 13 and the flange 9b is about 6m.
m, the distance between the rear end of the flange portion 9b and the front end of the second brake pin 11 is set to about 7 mm. At this time, the first spring member 10
A biasing force of 50 gf is applied to the first brake pin 9, and the second spring member 12 is in a free height state and does not generate a biasing force.

The cylinder member 15 is formed in a rod shape, and the tip of the cylinder member 15 contacts the second brake pin 11. When the cylinder member 15 moves in the wheel direction, the tip end is introduced into the case member 13. Further, a through hole is provided at the rear end portion to cross the cylinder member 15, and a parallel pin 16 is inserted into the through hole.

As a driving source for the cylinder member 15, an inexpensive and small motor 17 having an output of about 1 W at the maximum efficiency is used, and the torque generated by the output gear 21 is reduced by a speed reducer including a plurality of gears 18, 19 and 20. Is increasing.
The speed ratio of the reduction gear is set to about 1/850, and the generated torque of the motor 17 at the maximum efficiency is set to about 9 kgfcm.

FIG. 3 is a partial sectional view showing the positional relationship between the magnet and the Hall IC in the initial state of the wheel device for a walker according to the present invention. A magnet holder 22 and a joint member 23 which rotate coaxially and integrally with the output gear 21 are attached to the end of the shaft. A magnet 24 is mounted on the magnet holder 22, and a Hall IC 25 is mounted around the magnet holder 22 as a magnetic sensor. When the magnet 24 and the Hall IC 25 face each other, a signal is output from the Hall IC 25. In the present embodiment, the Hall IC 25 is arranged at 180 ° to serve as an electric rotation restricting means for the motor 17. Further, a plurality of gears 18, 19,
20, the output gear 21, the magnet holder 22, the magnet 24, and the Hall IC 25 are housed in the same housing case 26.

On the other hand, about 10
A spiral with a pitch of mm is formed, and the parallel pin 16 of the cylinder member 15 is screwed. This joint member 15 converts the rotational motion into a linear motion. When the motor 17 rotates and the joint member 15 operates between the Hall ICs 25, the cylinder member 15 linearly moves by about 5 mm.

Next, a braking mechanism based on a combination of these will be described.

FIG. 4 is a longitudinal sectional view showing a contact state between the first brake pin and the outer circumference of the brake ring of the wheel apparatus for a walker according to the present invention, and FIG.
FIG. 4 is a partial cross-sectional view showing a positional relationship between a magnet and a Hall IC in a contact state between a first braking pin and an outer periphery of a braking ring.

FIG. 6 is a vertical cross-sectional view of the wheel device for a walker according to the present invention, in which the cylinder member is operated to the maximum extent in a state where the first braking pin is in contact with the outer periphery of the braking ring, and FIG. FIG. 7 is a partial cross-sectional view showing a positional relationship between a magnet and a Hall IC when a cylinder member operates to a maximum extent in a contact state with a brake ring outer periphery.

FIG. 8 is a longitudinal sectional view showing a braking state of the wheel device for a walker according to the present invention.

Normally, since the first brake pin 9 is not fitted to the brake ring 9, the wheels 1 and the brake ring 6 rotate around the axle 3.

When the motor 17 rotates in response to a braking request from the user, the cylinder member 15 moves toward the wheel 1 and the first spring member 10 having a small spring constant contracts while the first brake pin 9 and the second brake pin 11 are contracted. , The second spring member 12 moves. Here, when the first brake pin 11 and the groove 8 of the brake ring 6 are opposed to each other, the movement of the cylinder member 15 by about 5 mm also causes the first brake pin 9 to move 5 mm, and the tip part fits into the groove 8. Then, the wheel 1 is braked. At this time, the first spring member 1
At 0, a biasing force of about 250 gf is generated, but it does not become a force to push back the second spring member 12.

On the other hand, when the first brake pin 9 and the brake ring 6 are not opposed to each other, the tip of the first brake pin 9 comes into contact with the outer circumference of the brake ring 6 by moving the cylinder member 15 by about 2 mm,
The movement of the cylinder member 15, that is, the rotation of the motor 17 is hindered, and the motor 17 is in a restrained state. However,
Due to the presence of the second spring member 12, the cylinder member 15 and the second brake pin 11 can move about 5 mm in total while the second spring member 12 contracts. At this time, the urging forces of the first spring member 10 and the second spring member 12 are about 100, respectively.
gf, about 1200 gf.

When the wheel 1 rotates about 10 mm, the groove 8 of the brake ring 6 and the tip of the first brake pin 9 face each other, and the urging force of the second spring member 12 causes the first brake pin 9 to rotate.
Side, the leading end is fitted into the groove 8, and the wheel 1 is braked. At this time, a biasing force of about 250 gf is generated in the first spring member 10, and the second spring member 12 returns to the free height state.

When there is a braking release request from the user, the motor 1
7 rotates in the opposite direction, and the cylinder member 15 moves outward of the wheel 1. Due to the urging force of the first spring member 10, the first brake pin 9, the second brake pin 11, and the second spring member 12 move, and the rear end of the second brake pin 11 comes into contact with the retaining member 14, and the initial state. Return to At this time, the tip of the first brake pin 9 completely disengages from the groove 8 of the brake ring 6, and the braking of the wheel 1 is released.

Next, an embodiment of a self-supporting walking support machine provided with a wheel device for a walker according to the present invention will be described with reference to the drawings. FIG. 9 is a front sectional view of the self-sustained walking assist device of the present invention, and FIG. 10 is a longitudinal sectional view of the self-sustained walking assist device of the present invention.

The independent walking support device according to the present invention comprises a right frame 27, a left frame 28, and left and right frames 27, 28.
Are formed by a front wheel 29, a rear wheel 30, and an intermediate wheel 31 provided at a lower portion of the vehicle, and are connected by a center frame 32 provided at an upper portion of the left and right frames 27, 28. The walker wheel device 33 is attached to the intermediate wheel 31.

The elevating member 34 includes left and right frames 27 and 28.
The lifting member 34 is provided so as to be freely inserted and removed from above, and is driven by a lifting mechanism 35 accommodated in the center frame 32.
Is performed by the control unit 36.

Although not shown, the lifting mechanism 35 uses a motor as a driving source and converts the linear movement of the lifting member 34 through a transmission unit such as a gear. Further, a chargeable power supply device is also housed in the center frame 32.

The connecting member 3 is attached to the upper end of the elevating member 34.
The upper limb support portion 38 is provided via 7. The upper limb support 38 is opened in a substantially U-shape on the side of the user, and a grip 39 and an operation unit 40 are provided on the front side. still,
The control unit 36 and the operation unit 40 are electrically connected.

The operation unit 40 includes an upper switch for raising and lowering the lifting member 34, a lower switch for lowering the lifting member 34, a brake switch for braking and releasing the intermediate wheel 31,
A brake lamp is provided for notifying braking and release of the brake.

In this embodiment, the left and right frames 27, 2
8 and the center frame 32 are covered with a cover 41, and the portions of the lifting member 34 outside the left and right frames 27 and 28 are covered with an elastic bellows 42.

Next, a series of operations using the apparatus of this embodiment will be described.

When the user presses the upper switch to perform the upright operation, the lifting mechanism 35 raises the lifting member 34 and the upper limb support 38. At this time, the braking mechanism of the walker wheel device 33 is activated by a program pre-installed in the control unit 36, and the intermediate wheel 31 is braked with a slight rotation of the intermediate wheel 31. At this time, the brake lamp is turned on to notify that the brake is in the braking state.

When the user walks, the brake switch is operated to release the braking of the brake mechanism of the walker wheel device 33, and the user can walk. If a dangerous state occurs during walking, the brake switch is operated to activate the braking mechanism and stop suddenly.

When the user presses the lower switch to perform a seating operation, the elevating mechanism 35 lowers the elevating member 34 and the upper limb support 38. At this time, the braking mechanism of the walker wheel device 33 is activated by a program pre-installed in the control unit 36, and the intermediate wheel 31 is braked with a slight rotation of the intermediate wheel 31. At this time, the brake lamp is turned on to notify that the brake is in the braking state.

When the user does not use the apparatus, the state can be maintained as it is, and the apparatus can be used as a parking brake.

[0064]

As described above, according to the wheel device for a walker according to the present invention and the self-sustained walking assist device provided with the device, a braking mechanism using an inexpensive and small motor can be provided.
The motor is not restrained during the braking operation by the action of the two spring members. Therefore, it is possible to provide a walker wheel device having a braking mechanism that operates reliably in response to a braking request of a user, has sufficient durability performance even for long-term use, and requires no maintenance. .

Further, by providing the self-standing walking support device with the same device, it is possible to operate the wheel braking in conjunction with the standing operation and the sitting operation, or to use it for sudden stop or parking.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an initial state of a wheel device for a walker according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an initial state of the wheel device for a walker according to one embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing a positional relationship between a magnet and a Hall IC in an initial state of the wheel device for a walker according to one embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a contact state between a first braking pin and an outer periphery of a braking ring of the wheel device for a walker according to one embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing a positional relationship between a magnet and a Hall IC in a contact state between a first braking pin and an outer periphery of a braking ring of a wheel device for a walker according to an embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of the walker wheel apparatus according to the embodiment of the present invention when the cylinder member operates to its maximum in a contact state between the first brake pin and the outer circumference of the brake ring.

FIG. 7 shows the positional relationship between the magnet and the Hall IC when the cylinder member operates to the maximum in a state where the first brake pin and the outer circumference of the brake ring of the wheel device for a walker according to one embodiment of the present invention are in contact with each other. Partial sectional view.

FIG. 8 is a longitudinal sectional view showing a braking state of the wheel device for a walker according to one embodiment of the present invention.

FIG. 9 is a front sectional view of an independent walking support device according to an embodiment of the present invention.

FIG. 10 is a longitudinal sectional view of an independent walking support device according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wheel, 2, 7 ... Bearing, 3 ... Axle, 4, 5 ... Fixed plate, 6 ... Braking ring, 8 ... Groove part, 9 ... 1st braking pin, 10
... 1st spring member, 11 ... 2nd brake pin, 12 ... 2nd spring member, 13 ... case member, 14 ... stopper, 15 ... cylinder member, 16 ... parallel pin, 17 ... motor, 18, 1
9, 20 gear, 21 output gear, 22 magnet holder, 23 joint member, 24 magnet, 25 hall IC, 26 storage case, 27 right frame, 28 left frame, 29 front wheel, 30 ... rear wheel, 31 ... middle wheel, 3
2 ... Center frame, 33 ... Wheel device for walker, 34
... Lifting member, 35 Lifting mechanism, 36 Control part, 37 Connection member, 38 Upper limb support part, 39 Grip, 40 Operation part, 41 Cover, 42 Bellows.

Claims (4)

[Claims] 1. A walker wheel device comprising a wheel, an axle penetrating the wheel and supporting the wheel, and a braking means for braking the rotation of the wheel, wherein the braking means is pivotally mounted on the axle. And a brake ring that rotates integrally with the wheel and has a plurality of grooves of a predetermined depth on the outer periphery, a first brake pin having a tip fitted into the groove, and a first brake pin of the wheel. The outer periphery of the braking ring and the first
A first spring member for securing a predetermined interval at the tip of the brake pin, a second spring member abutting on the rear end of the first brake pin, and biased outward by the second spring member toward the outside of the wheel; A second brake pin having a predetermined distance from the rear end of the first brake pin, a cylinder member for operating the second brake pin in the wheel direction, and a drive source for driving the cylinder member. Walker wheel device. 2. The method according to claim 1, wherein the first spring member has a spring constant
The wheel device for a walker according to claim 1, wherein the spring constant is smaller than a spring constant of the spring member. 3. The apparatus according to claim 1, wherein said drive source is a motor, a reduction gear is provided on an output shaft of said motor, and rotation restricting means is provided on an output shaft of said reduction gear. Wheel device for walkers. 4. A frame, an elevating member movably provided in the frame, a moving mechanism comprising a plurality of wheels provided below the frame, and a moving mechanism built in the frame and used by the elevating operation of the elevating member. An elevating mechanism for moving the body of the user up and down from a sitting position to a standing position, an upper limb support provided at an upper end of the elevating member, a control unit for controlling the elevating mechanism, and an operation for a user to operate A self-supporting walking support machine comprising a part, wherein the moving mechanism includes the wheel device for a walker according to any one of claims 1 to 3.