JP2019198574A - Wheel for wheelchair, wheelchair, and system for measuring travel state of wheelchair - Google Patents

Abstract

To provide a wheel for a wheelchair, which enables the direct and accurate measurement of a vibration and an impact applied to the wheelchair, the wheelchair, and a system for measuring a travel state of the wheelchair.SOLUTION: A wheel 1 for a wheelchair includes: a wheel 2 that has an axle 3 and a rotor 4 rotated in such a manner that the axle 3 serves as a rotational axis; a support 11 that rotatably supports the wheel 2; and a measurement part 21 that measures at least any one of the acceleration, impact load and travel sound of the wheel 2. The measurement part 21 is mounted on the rotor 4. Preferably, the wheel 1 for the wheelchair is attached as a front wheel of the wheelchair.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wheelchair wheel, a wheelchair, and a traveling state measurement system for a wheelchair that can measure vibration and impact applied to the wheelchair.

  The determination of whether or not various parts such as frames and wheels that make up a wheelchair are exchanged or repaired is made periodically based on visual inspection by a worker such as a wheelchair safety mechanic or the sound of hitting with a tool such as a hammer. It has been broken. However, since the worker does not know all the usual usage methods of wheelchairs, habits during use, traveling conditions, etc., there is sufficient objective judgment material on whether replacement or repair is necessary. That's not true. For this reason, as a means for the operator to know the state of the wheelchair and the traveling state, it is conceivable to measure vibration and impact transmitted to the wheelchair. In relation to this, Patent Document 1 discloses that an acceleration sensor is mounted on the axle of a footrest (foot support) and a front wheel caster in order to detect vibration and impact transmitted to the wheelchair.

JP-A-2018-000940

  However, the wheelchair of Patent Document 1 is provided with an acceleration sensor on an axle of a footrest or a front wheel caster, but this is provided only for a comparative test between the wheelchair and a conventional wheelchair. It cannot be attached to wheelchair products. Further, even if an acceleration sensor is provided on a footrest (foot support) or the like, an accurate value of vibration or impact of the rotating body cannot be measured due to an impact absorbing material action between the members of the footrest and the rotating body. Furthermore, since the shape of the footrest varies greatly depending on the manufacturer of the wheelchair, it is not realistic to attach an acceleration sensor to the footrest of all wheelchairs, and there is a possibility that it will not be widespread.

  Accordingly, an object of the present invention is to provide a wheelchair for a wheelchair, a wheelchair, and a traveling state measurement system for the wheelchair that can directly and accurately measure vibration and impact applied to the wheelchair.

  The wheelchair wheel of the present invention that has solved the above-described problems includes a wheel having an axle, a rotating body that rotates about the axle, and a support that rotatably supports the wheel. A measurement unit that measures at least one of acceleration, impact load, and running sound of the motor, and the measurement unit has a gist in that it is attached to the rotating body. In the present invention, since the rotating rotating body is provided with the measuring unit, it is possible to directly and accurately measure vibration and impact applied to the wheel.

  The wheel is preferably attached as a front wheel of a wheelchair.

  The acceleration is preferably acceleration in two directions perpendicular to the wheel rotation axis direction.

  The wheel is preferably connected to the measurement unit and has a recording unit for storing data transmitted from the measurement unit.

  The wheel preferably includes a power generation unit that generates power using the rotation of the wheel as power, and the power generation unit is preferably connected to the measurement unit.

  The present invention also includes a wheelchair in which the wheelchair wheel is provided on at least one of the left and right front sides in the traveling direction.

  According to the present invention, there is provided a wheelchair in which at least one of the first front wheel and the second front wheel provided on the left and right of the front side in the traveling direction is the wheelchair wheel; and at least one of the first front wheel and the second front wheel A processing unit that compares a predetermined value with at least one of the measured values of wheel acceleration, impact load, and running sound measured by any one of them, and a transmitter that emits a predetermined signal when the measured value exceeds the predetermined value And a wheelchair traveling state measurement system including:

  According to the present invention, vibrations and impacts applied to a wheelchair can be directly and accurately measured, so that it is possible to appropriately determine whether or not various members constituting the wheelchair are exchanged or repaired.

It is a wheelchair wheel concerning an embodiment of the invention, and represents a perspective view in the state where a cover was removed. It is a wheelchair wheel concerning an embodiment of the invention, and represents a perspective view in the state where a cover was attached. Sectional drawing (partial top view) along the diameter direction of the wheel for wheelchairs concerning embodiment of this invention is represented. The front view of the wheel for wheelchairs concerning an embodiment of the invention is represented. The block diagram of the measuring device which concerns on embodiment of this invention is represented. The perspective view of the wheelchair in which the wheel for wheelchairs shown in FIG. 2 is attached is represented. The block diagram of the driving | running | working condition measurement system of the wheelchair which concerns on embodiment of this invention is represented. The graph which shows the signal of the acceleration sensor of the wheelchair wheel which concerns on embodiment of this invention is represented. The graph which shows the other signal from the acceleration sensor of the wheelchair wheel which concerns on embodiment of this invention is represented.

  Hereinafter, the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated examples, and may be implemented with appropriate modifications within a range that can be adapted to the purpose described above and below. Any of these may be included in the technical scope of the present invention.

1. Wheelchair Wheel A wheelchair wheel according to an embodiment of the present invention will be described with reference to FIGS. 1 to 2 show perspective views of a wheelchair wheel according to an embodiment of the present invention, FIG. 1 shows a state in which a cover is removed from a wheel rotating body, and FIG. 2 shows a cover on the wheel rotating body. The attached state is shown. 3 and 4 show a sectional view (partial plan view) and a front view along the diameter direction of the wheelchair wheel, respectively, and FIG. 5 shows a block diagram of the measuring device. In order to facilitate understanding of the wheel structure, the support is omitted in FIG. 3, and the support and axle are omitted in FIG.

  As shown in FIGS. 1 to 4, the wheelchair wheel 1 according to the present invention includes a wheel 2 having an axle 3 and a rotating body 4 that rotates about the axle 3 as a rotation axis, and supports the wheel 2 rotatably. And a measurement unit 21 that measures at least one of acceleration, impact load, and traveling sound of the wheel 2, and the measurement unit 21 is attached to the rotating body 4. Yes. In the present invention, the measurement unit 21 is provided in the rotating rotator 4, so that vibrations and impacts applied to the wheels 2 can be directly and accurately measured.

  The wheel 2 includes an axle 3 and a rotating body 4 that rotates about the axle 3 as a rotation axis. By rotating the rotating body 4 with respect to the axle 3, the wheel 2 can be advanced and retracted, and the wheelchair 40 can be moved.

  As long as the wheel 2 can be attached to the wheelchair 40 as shown in FIG. 6, the wheel 2 may be used for the front wheel or the rear wheel, but is preferably attached as a front wheel of the wheelchair 40. Since the front wheel is a portion that first contacts a step or the like when the wheelchair 40 moves forward, vibration and impact applied to the wheelchair 40 can be directly measured. The front wheels may be casters and the rear wheels may be drive wheels.

  The wheel 2 is preferably attached to the manual wheelchair 40, but may be attached to the electric wheelchair 40.

  As shown in FIG. 1, the rotating body 4 may include a rim 5 that is formed in an annular shape and a tire 6 that is attached around the rim 5. As shown in FIG. 3, a hub 7 is provided at the center of the rotating body 4 and extends in the radial direction of the rotating body 4, and a plurality of spokes 8 connecting the hub 7 and the rim 5. May be provided. The tire 6 may be a tube type having a tube enclosing air, or may be a tubeless type. Although the example of the spoke wheel was shown in FIG. 1, the cast wheel may be provided. Although not shown, the rotating body 4 may not have the hub 7 and the spoke 8 from the viewpoint of weight reduction.

  As shown in FIGS. 2 and 3, the rotating body 4 preferably has a cover 9 for covering the hub 7, spoke 8, cast and the like. The cover 9 only needs to cover at least a part of the hub 7, the spoke 8, and the cast, and preferably covers the entire hub 7 and the spoke 8, or the entire cast.

  The axle 3 is a shaft member that extends from the one main surface side of the rotating body 4 toward the other main surface side. The direction from the one main surface side of the rotating body 4 to the other main surface side is the rotation axis direction of the wheel 2. Since both ends of the axle 3 of the wheel 2 are clamped by a support 11 described later, they are fixed and do not move.

  The support 11 is a member that rotatably supports the rotating body 4. The support body 11 extends in the vertical direction, is provided on the lower side of the shaft portion 12 connected to the wheelchair 40, and is divided into two parts. One main surface of the rotating body 4 You may have the support part 13 holding the rotary body 4 from the side and the other main surface side on the opposite side to this one main surface side.

  The shaft portion 12 may be any shape that can be engaged with the frame 60 of the wheelchair 40, and as shown in FIG. 1, a screw thread inserted into the hollow frame 60 of the wheelchair 40 at the upper end portion of the shaft portion 12. 14 may be provided.

  Examples of the material constituting the portion other than the tire 6 of the wheel 2 and the support 11 include metals such as iron, stainless steel, aluminum alloy, and titanium alloy, and synthetic resins.

  Examples of the material constituting the tire 6 of the wheel 2 include rubbers such as natural rubber and synthetic rubber.

  The measurement unit 21 is a sensor that can measure at least one physical quantity of acceleration, impact load, and traveling sound of the wheel 2. By measuring at least one of the acceleration, the impact load, and the traveling sound of the wheel 2 by the measurement unit 21, the vibration and impact applied to the wheelchair 40 can be measured. Among these, the measurement unit 21 preferably measures the acceleration of the wheel 2. 2 to 3 and 5, an example in which the measurement device 20 includes the measurement unit 21 will be described.

  Although the direction of acceleration is not particularly limited, the acceleration is preferably acceleration in a direction perpendicular to the rotation axis direction of the wheel 2, and more preferably acceleration in two directions perpendicular to the rotation axis direction of the wheel 2. Since vibrations and impacts in two directions perpendicular to the rotation axis direction of the wheel 2 are likely to affect the breakage and deformation of various members constituting the wheelchair 40, it is desirable to measure acceleration in these directions.

  Further, the rotation number of the wheel 2 may be measured by the measuring unit 21. Thereby, since the travel distance of the wheelchair 40 is computable, the load concerning the wheelchair 40 whole can be estimated. In addition, publicly known tachometers, such as an electromagnetic tachometer and a photoelectric tachometer, can be used for rotation speed measurement.

  One or a plurality of sensors as the measurement unit 21 can be provided. For example, both the acceleration and the rotational speed may be measured by one sensor, and a first sensor that measures the acceleration and a second sensor that measures the rotational speed may be provided. In that case, the first sensor and the second sensor may be the same type or different types.

A known acceleration sensor can be used for measuring the acceleration (unit: m / sec ² ). Various sensors such as a capacitance type that measures a change in capacitance, a piezoelectric type that uses a piezoelectric material, and a magnetic type that uses a magnetoresistive effect can be used.

  For measurement of the impact load (unit: N), a load cell (load converter) such as a strain gauge load cell, a piezoelectric load cell, a magnetostrictive load cell, a capacitance load cell, a gyro load cell, or the like is preferably used.

  For the measurement of traveling sound, for example, a small microphone such as an MEMS microphone such as an electret condenser microphone or a silicon microphone can be used. It is preferable to measure a sound pressure (unit: Pa) or a sound pressure level (unit: dB) as the running sound.

  As shown in FIG. 2, the measuring unit 21 is preferably attached to the cover 9 of the rotating body 4, and more preferably attached to the inner surface of the cover 9 of the rotating body 4 as shown in FIG. 3. . Specifically, it is more preferable that the back side surface of the substrate of the measuring device 20 including the measuring unit 21 is bonded to the inner side surface of the cover 9. Thereby, since measurement part 21 is hard to be exposed to the outside of wheel 2, failure of measurement part 21 and drop-off of measurement part 21 from rotating body 4 can be controlled.

  As shown in FIG. 3, the measuring unit 21 may be disposed outside the spoke 8 in the direction from the one main surface side to the other main surface side of the rotating body 4.

  Although not shown, in the circumferential direction of the wheel 2, the measuring unit 21 may be disposed between adjacent spokes 8. By arranging the measuring unit 21 in this way, the gap between the adjacent spokes 8 can be effectively utilized.

  Although not shown, the measuring unit 21 may be attached to the hub 7, the spoke 8, or the cast. Also by this, it is possible to suppress the failure of the measuring unit 21 and the dropping of the measuring unit 21 from the rotating body 4.

  As a method of attaching the measuring unit 21 to the rotating body 4, there is a method of screwing, bonding, or welding a substrate of the measuring device 20 including the measuring unit 21 to the rotating body 4.

  As shown in FIG. 4, when the rotating body 4 is divided into the inner section 2 </ b> A, the central section 2 </ b> B, and the outer section 2 </ b> C in the radial direction, the measurement unit 21 is connected to the central section 2 </ b> B or the outer section. It is preferably provided in the section 2C, and more preferably provided in the outer section 2C. Thereby, since the measurement part 21 can be arrange | positioned in the position close | similar to the tire 6 of the rotary body 4, the vibration and impact added to the wheelchair 40 can be measured in the form close | similar to raw data. Further, when the rotation speed is measured by the measurement unit 21, the measurement can be easily performed.

  FIG. 2 shows an example in which acceleration is measured by attaching a magnetoresistive sensor having a magnetoresistive element to the rotating body 4. When a magnetoresistive sensor is used as the measuring unit 21, the magnetoresistive sensor is attached to the rotating body 4, and the magnet 24 is attached to at least a part of the support 11 (FIG. 2), or at least the support 11. It is preferable that a part is magnetized (not shown). By measuring the change of the resistance value when receiving a magnetic field from the magnet 24, both the acceleration and the rotation speed of the wheel 2 can be measured by the magnetoresistive sensor. The part to which the magnet 24 is attached or the magnetized part is preferably a support part 13 that is divided into two parts of the support 11, and is arranged on the inner side of the support 11 in the radial direction than the tire 6. It is more preferable that it is a portion.

  Conventionally, a sensor is attached to a fixed portion that does not rotate (for example, the frame 60 of the wheelchair 40 or the axle 3 of the wheel 2), and the magnet 24 is attached to the rotating body 4. However, in order to improve the sitting comfort of the wheelchair 40 and to stabilize the position of the center of gravity, a material that easily absorbs impact may be used for the fixing portion, particularly the frame 60. I can't get it. For this reason, in this invention, the measurement part 21 is attached to the rotary body 4 for the purpose of measuring the vibration and the impact added to the wheel 2 directly and correctly.

  The wheel 2 is preferably connected to the measuring unit 21 and has a recording unit 22 for storing data transmitted from the measuring unit 21. FIG. 5 shows an example in which the measuring device 20 has a recording unit 22. By providing the recording unit 22, it is not necessary to analyze the data acquired by the measurement unit 21 as needed, so that power consumption due to data communication can be suppressed. A known semiconductor memory can be used as the recording unit 22.

  The measurement device 20 may have a power supply unit that supplies power to the measurement unit 21. The power supply unit is preferably connected to the measurement unit 21. As the power source, a known battery such as a primary battery or a secondary battery can be used.

  The power supply unit may generate power using the rotation of the wheel 2 as power. As shown in FIG. 5, the wheel 2 has a power generation unit 23 that generates power using the rotation of the wheel 2 as power, and the power generation unit 23 is preferably connected to the measurement unit 21. Thereby, since rotation of the wheel 2, that is, using the wheelchair 40, can secure the power supplied to the measurement unit 21, it is not necessary to periodically replace the power supply unit.

  Similarly to the measurement unit 21, the recording unit 22, the power supply unit, and the power generation unit 23 are preferably joined to the inner surface of the cover 9 of the rotating body 4.

2. Wheelchair FIG. 6 shows a perspective view of a wheelchair to which the wheelchair wheel shown in FIG. 2 is attached. The wheelchair 40 has a first front wheel 41 and a second front wheel 42 provided on the left and right of the front side in the traveling direction. The type of wheelchair 40 is not particularly limited, but the wheelchair 40 is connected to the frame 60 constituting the overall shape of the wheelchair 40 and the first front wheels 41 provided on the left and right of the front side in the traveling direction. And a second front wheel 42 and a first rear wheel 51 and a second rear wheel 52 that are connected to the frame 60 and are attached to the left and right of the rear side in the traveling direction. In addition, the wheelchair 40 shown in FIG. 6 is provided with a seat surface sheet 61, a back side sheet 62, and a footrest 63 on which a user's foot is placed.

  In the wheelchair 40, it is preferable that the wheelchair wheel 1 is provided on at least one of the left and right of the front side in the traveling direction. That is, it is preferable that at least one of the first front wheel 41 and the second front wheel 42 is the wheelchair wheel 1 described in “1. Wheelchair Wheel”. Since the front wheel is a portion that first contacts a step or the like when the wheelchair 40 moves forward, vibration and impact applied to the wheelchair 40 can be directly measured.

  As shown in FIG. 6, it is more preferable that the wheelchair wheel 1 is provided on each of the left and right front sides in the traveling direction. Thereby, since the measurement part 21 is provided in the front wheel of right and left both sides, the vibration and the impact added to the wheelchair 40 can be measured and evaluated more correctly.

  In the wheelchair 40, the wheelchair wheel 1 may be provided on at least one of the left and right of the rear side in the traveling direction. That is, at least one of the first rear wheel 51 and the second rear wheel 52 may be the wheelchair wheel 1. As a result, vibrations and impacts applied to the rear wheels can be directly measured. In the wheelchair 40, the first rear wheel 51 and the second rear wheel 52 may not be the wheelchair wheel 1. This is because, since the rear wheel is closer to the seating surface sheet 61 than the front wheel, a material having high shock absorption is often selected, and it is difficult to measure raw data of vibration and shock applied to the wheelchair 40.

3. Wheelchair traveling state measurement system The present invention relates to a wheelchair in which at least one of the first front wheel and the second front wheel provided on the left and right of the front side in the traveling direction is the wheelchair wheel; (2) A processing unit that compares at least one measured value of wheel acceleration, impact load, and traveling sound measured with at least one of the front wheels with a predetermined value, and a predetermined signal when the measured value exceeds the predetermined value. A traveling state measurement system for a wheelchair including: a transmitting unit that emits; Hereinafter, the wheelchair traveling state measurement system may be simply referred to as “system”. In this way, at least one of the first front wheel and the second front wheel is the wheelchair wheel in which the rotating body is attached to the measurement unit, and the system includes a calculation device, whereby the measurement by the measurement unit is performed. Based on the value, it is possible to appropriately determine whether or not various members constituting the wheelchair are exchanged or repaired.

  In FIG. 7, the block diagram of the driving | running | working condition measurement system 100 of the wheelchair 40 which concerns on embodiment of this invention is shown. As illustrated in FIG. 7, the wheelchair 40 travel state measurement system 100 includes a wheelchair 40 in which the wheelchair wheel 1 is provided as a first front wheel 41 and a second front wheel 42 on the front left and right in the traveling direction, respectively. It is preferable that the arithmetic unit 30 which has the part 31 and the transmission part 32 is included. Thereby, since the measurement part 21 is provided in the front wheel of right and left both sides, the vibration and the impact added to the wheelchair 40 can be measured and evaluated more correctly.

  The wheelchair 40 has at least a first front wheel 41 and a second front wheel 42. As these front wheels, the wheelchair wheel 1 described in “1. Wheelchair Wheel” can be used. The first front wheel 41 and the second front wheel 42 each have a measuring unit 21 that measures at least one of acceleration, impact load, and traveling sound of the wheel 2.

  The arithmetic device 30 is a personal computer, a computer such as a microcomputer, a tablet terminal, or a smartphone capable of performing various arithmetic processes and device control.

  The measurement value acquired by the measurement unit 21 of the first front wheel 41 or the second front wheel 42 is transmitted to the recording unit 22. In order to transmit the data stored in the recording unit 22 to the processing unit 31 of the arithmetic device 30, wireless communication or wired communication may be used.

The acceleration data acquired by the measurement unit 21 can be represented by, for example, a graph in which the horizontal axis is time (unit: second) and the vertical axis is acceleration (unit: m / sec ² ). In the graph showing acceleration, if the number of times exceeding a predetermined value is more than a predetermined number of times a day (for example, 10 times or more), the wheelchair 40 may be heavily loaded. It is desirable to do.

  In the processing unit 31, at least one of a measured value and a predetermined value (hereinafter referred to as a first predetermined value) of acceleration, impact load, and running sound of the wheel 2 measured by at least one of the first front wheel 41 and the second front wheel 42. It is preferable to compare the first predetermined value C1 with the measured value of at least one of the acceleration of the wheel 2, the impact load, and the running sound measured by the first front wheel 41 and the second front wheel 42. More preferably. By appropriately setting the first predetermined value C1 in this way, the wheelchair 40 can be replaced or repaired at an appropriate time. The first predetermined value C1 can be appropriately set according to the relationship between the vibration or impact applied to the wheelchair 40 and the breakage or deformation of the wheelchair 40, the user's age, sex, physique and the like. In the embodiment of the present invention, the test of JIS T9201 is performed using the wheelchair 40 on which the measuring device 20 is mounted, and vibrations and shocks applied from the obtained data and damage and deformation of various members constituting the wheelchair 40 and the wheelchair 40 are described. You can guess the relationship.

The processing unit 31 may compare the data obtained by converting the physical quantity of the measurement value measured by the first front wheel 41 or the second front wheel 42 with a predetermined value (hereinafter, a second predetermined value C2). For example, the impact force F (N) represented by the product of acceleration (unit: m / sec ² ) and the total weight (kg) of the wheelchair 40 and the user is calculated, and the impact force F is definitely integrated at a predetermined time t. The impact energy E (J) thus obtained may be compared with the second predetermined value C2. Thus, by using the impact energy E, it is possible to estimate a decrease in strength of various members constituting the wheelchair 40. More specific examples of estimation contents will be described later.

  The transmitter 32 emits a predetermined signal when the measured value exceeds a predetermined value. By transmitting a predetermined signal by the transmission unit 32, it may be notified that the measured value has exceeded a predetermined value to a notification target person such as a maintenance inspector or a user of the wheelchair 40. Alternatively, the predetermined signal may be transmitted to a notification device provided separately from the arithmetic device 30 and notified to the notification subject using the notification device. Examples of the notification method include voice, still image, moving image, lamp, and vibration. Examples of the notification device include an external display device, a mobile phone, a smartphone, a tablet terminal, a speaker, and an earphone.

  Hereinafter, the measurement example of the acceleration obtained from the wheelchair wheel according to the embodiment of the present invention is shown in the graphs of FIGS. 8 and 9, the horizontal axis represents time [second], and the vertical axis represents acceleration G. In both graphs, the solid line indicates the acceleration signal from the measurement unit 21 of the first front wheel 41 attached to the left side of the wheelchair 40, and the broken line indicates the second front wheel 42 attached to the right side of the wheelchair 40. The acceleration signal from the measurement part 21 is shown. The obtained acceleration signal can evaluate the use state of the wheelchair 40 or perform maintenance of the wheelchair 40.

4). Discrimination example of use state of wheelchair 40 (1) It is possible to grasp whether the use environment of wheelchair 40 is outdoor or indoor. Specifically, when the average value of the acceleration G exceeds a predetermined value, it can be determined that the vehicle is used outdoors. Based on the determination criterion and the travel distance, it is possible to estimate the strength reduction of the first front wheel 41, the second front wheel 42, the first rear wheel 51, and the second rear wheel 52.
(2) By recording the amount of impact accumulated during the period of use (a value obtained by definite integration of acceleration over a certain period of time; hereinafter referred to as “damage amount”), the strength of various members constituting the wheelchair 40 can be reduced. Can be estimated.
(3) By providing the measuring device 20 on both the first front wheel 41 and the second front wheel 42, the left-right difference in the amount of damage can be known, and the level of strength reduction due to the twisting load of the wheelchair 40 can be estimated. In order to realize this, the processing unit 31 includes a comparison unit (not shown), and a step of comparing the respective accelerations or impact amounts of the first front wheel 41 and the second front wheel 42 is executed.
(4) The rotational speeds of the first front wheel 41 and the second front wheel 42 are also measured separately, and there are many impacts in the non-running state when the acceleration G varies greatly despite the low rotational speed values. That is, it can be determined that there is a lot of damage when carrying the wheelchair 40 or loading it in the car.

5. Example of maintenance of wheelchair 40 (1) Frame 60 (e.g. cross) if the damage amount of the smaller left and right is 300,000 or more and the impact of 1G or more is 30,000 times or more in a state where the left-right difference in damage amount is a predetermined value or more Replace and repair the frame.
(2) If the damage amount is 300,000 or more and the impact of 1G or more is 30,000 times or more in a state where the left-right difference of the damage amount is a predetermined value or less, the support portion 13 (for example, caster fork) is replaced / repaired. .
(3) If the running distance in the outdoor use state becomes 550 km or more in total, the wheel 2 or the wheelchair wheel 1 is replaced.
(4) If the impact of 1G or more reaches 2,000 times or more, the seat sheet 61 and the back folding bracket are replaced and repaired.

1: Wheelchair wheel 2: Wheel 2A: Inner section 2B: Central section 2C: Outer section 3: Axle 4: Rotating body 5: Rim 6: Tire 7: Hub 8: Spoke 9: Cover 10: Tire in the radial direction of the wheel Inner part 11: support body 12: shaft part 13: support part 20: measuring device 21: measuring part 22: recording part 23: power generating part 24: magnet 30: arithmetic unit 31: processing part 32: transmitting part 40: Wheelchair 41: 1st front wheel 42: 2nd front wheel 51: 1st rear wheel 52: 2nd rear wheel 60: Frame 61: Seat surface seat 62: Back seat 63: Footrest 100: Running condition measurement system for wheelchair

Claims (7)

A wheel having an axle, and a rotating body that rotates about the axle as a rotation axis;
A support that rotatably supports the wheel;
A measurement unit that measures at least one of acceleration, impact load, and running sound of the wheel, and
The wheelchair wheel, wherein the measuring unit is attached to the rotating body.   The wheel for a wheelchair according to claim 1, wherein the wheel is attached as a front wheel of a wheelchair.   The wheelchair wheel according to claim 1 or 2, wherein the acceleration is acceleration in two directions perpendicular to a rotation axis direction of the wheel.   The wheel for wheelchairs as described in any one of Claims 1-3 which has the recording part which is connected with the said measurement part and stores the data transmitted from the said measurement part. The wheel has a power generation unit that generates power using the rotation of the wheel as power,
The wheelchair wheel according to any one of claims 1 to 4, wherein the power generation unit is connected to the measurement unit.   A wheelchair in which the wheelchair wheel according to any one of claims 1 to 5 is provided on at least one of left and right front sides in the traveling direction. A wheelchair in which at least one of the first front wheel and the second front wheel provided on the left and right of the front side in the traveling direction is a wheelchair wheel according to any one of claims 1 to 5;
A processing unit that compares a predetermined value with a measured value of at least one of wheel acceleration, impact load, and running sound measured by at least one of the first front wheel and the second front wheel; An arithmetic unit having a transmitter that emits a predetermined signal when a predetermined value is exceeded;
Wheelchair running status measurement system including