Vehicle wheel derailment prevention device

Abstract

To provide a vehicle wheel derailment prevention device that can detect wheel derailment in advance even in a large vehicle having many wheels, and that can be retrofitted to reduce component costs with a simple configuration. [Solution] A vehicle wheel derailment prevention device 30 detects the state of the wheels (rear wheels) 13 of a vehicle 10 to prevent wheels from derailing in advance. The vehicle wheel derailment prevention device 30 includes sensor units 31 that are provided outward in the vehicle width direction of the wheels (rear wheels) 13 and in front and behind the wheels (rear wheels) 13 and that detect movement of the wheels (rear wheels) 13 in the vehicle width direction, and an alarm unit that is provided in the driver's seat 14 of the vehicle 10 and that notifies that the wheels (rear wheels) 13 have been detected by the sensor units 31.

Description

[Technical Field]

[0001] The present invention relates to a vehicle wheel derailment prevention device that detects the state of a vehicle's wheels and prevents the wheels from derailing in advance. [Background technology]

[0002] In recent years, there has been an increasing need to detect wheel derailment in advance from the viewpoint of ensuring vehicle safety, etc. As one means for preventing wheels (including tires with holes or tires only, etc.) attached to a vehicle from falling off while the vehicle is moving, there are known wheel derailment prevention devices for vehicles, such as those described in Patent Documents 1, 2, and 3.

[0003] In the technology of Patent Document 1, the wheel state determination device includes an acceleration acquisition unit that sequentially acquires axial acceleration in the axle direction of the vehicle wheels, a wheel detachment sign determination unit that determines that there is a sign of wheel detachment when the acquired axial acceleration is greater than a predetermined determination threshold, and a driving state acquisition unit that acquires the vehicle's driving state. The wheel detachment sign determination unit performs a wheel detachment sign determination while the driving state is in a first predetermined state, and suspends the sign determination while the driving state is in a second predetermined state different from the first predetermined state.

[0004] In the technology of Patent Document 2, a vehicle is equipped with a front tire, a rear tire, sensors that detect the condition of the tires, a control unit, a navigation device, etc. When an abnormality in one of the tires is predicted, the control unit reduces the output of the vehicle to slow down the vehicle's speed, and when the vehicle is evacuated to a safe place, the control unit displays on a display a driving route that restricts the vehicle from turning toward the tire that is predicted to fall off.

[0005] The technology of Patent Document 3 is a wheel detachment detection device that detects acceleration generated in the axle direction of the wheel using detection means attached to the wheel, and the detected acceleration is sent to determination means mounted on a location other than the wheel of the vehicle.If the acceleration is not within a predetermined range, the determination means determines that the wheel is not properly attached and notifies the user to that effect.

[0006] Incidentally, there is a growing need to detect wheel slippage in advance, even for large vehicles such as trucks and trailers. However, large vehicles are often used on rough terrain at work sites, and the weight of the cargo they transport is heavy, resulting in significant vibrations being transmitted to the wheels.

[0007] In addition, existing large vehicles do not have devices to detect wheel derailment, and retrofitting them is required. However, many large vehicles have only one rear wheel on one side of the vehicle width, with two axles arranged in two rows across the vehicle width, making it structurally difficult and costly to retrofit sensors to all wheels.

[0008] However, the technologies in Patent Documents 1 to 3 use acceleration sensors to detect signs of wheel derailment and other problems, which may cause malfunctions in large vehicles that experience large vibrations transmitted to the wheels. In addition, in large vehicles with many wheels, it is difficult to retrofit sensors to all of the wheels, and the parts costs are high. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 2023-108689 [Patent Document 2] Patent Publication No. 2021-59280 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-329907 Summary of the Invention [Problem to be solved by the invention]

[0010] In view of the above, an object of the present invention is to provide a retrofittable wheel derailment prevention device for vehicles that can detect wheel derailment in advance, even on large vehicles with many wheels, and that has a simple configuration that reduces parts costs. [Means for solving the problem]

[0011] According to an embodiment of the present invention, there is provided a vehicle wheel derailment prevention device that detects the state of a vehicle wheel and prevents the vehicle wheel from derailing in advance, The wheels are rotatably mounted on the body of the vehicle via axles in an unsteered state, sensor units provided outward in the vehicle width direction from the wheels and in front and behind the wheels, respectively, for detecting movement of the wheels in the vehicle width direction; and an alarm unit provided in the driver's seat of the vehicle for notifying the driver that the wheel has been detected by the sensor unit.

[0012] According to this configuration, the vehicle wheel derailment prevention device is rotatably mounted on the vehicle body via the axle with the wheels not being steered, and is equipped with sensor units that are provided outward in the vehicle width direction of the wheels and in front and behind the wheels to detect movement of the wheels in the vehicle width direction, so that the device can be easily retrofitted inside a wheel house, etc. Furthermore, since the device is equipped with an alarm unit that is provided in the driver's seat of the vehicle and notifies that a wheel has been detected by the sensor unit, it is possible to provide a vehicle wheel derailment prevention device that can be retrofitted, even for large vehicles with many wheels, that can detect wheel derailment in advance and has a simple configuration that reduces parts costs.

[0013] Preferably, the alarm unit comprises a visual alarm unit and an audible alarm unit.

[0014] With this configuration, the alarm unit is equipped with a visual alarm unit and an audible alarm unit, so that signs of wheel derailment can be reliably notified visually and audibly. Furthermore, by using an existing monitor or an inexpensive lamp as the visual alarm unit and an existing speaker as the audible alarm unit, parts costs can be reduced.

[0015] Preferably, the wheels are rear wheels, The rear wheels are arranged on one side of the vehicle width direction on two or more axes in the front-rear direction of the vehicle and in two rows in the vehicle width direction, The sensor units are provided so that a pair of the sensor units can detect the states of the rear wheels for two or more axes located on the outer side in the vehicle width direction.

[0016] According to this configuration, the wheels are rear wheels, and the rear wheels are arranged on two or more axes in the fore-and-aft direction of the vehicle on one side of the vehicle width and in two rows in the vehicle width direction, and the sensor units are arranged so that the rear wheels for two or more axes on the outer side in the vehicle width direction can be detected by a pair of sensor units, so even multiple wheels can be detected by a pair of sensor units, and even for large vehicles with many wheels, wheel derailment can be detected in advance, and a wheel derailment prevention device for vehicles can be made that can be retrofitted with a simple configuration that reduces parts costs.

[0017] Preferably, the sensor unit is positioned so as to be able to detect the condition between the rear wheels on two or more axes on the inside in the vehicle width direction and the rear wheels on two or more axes on the outside in the vehicle width direction, and is configured so that the rear wheels on two or more axes on the inside in the vehicle width direction can be detected by a pair of the sensor units.

[0018] With this configuration, the sensor unit is positioned to be able to detect the condition between the two or more rear wheels on the inner side in the vehicle width direction and the two or more rear wheels on the outer side in the vehicle width direction, so it can detect not only the condition of the wheels on the inner side in the vehicle width direction, but also the condition of the wheels on the outer side in the vehicle width direction. Therefore, even for large vehicles with many wheels, it is possible to detect wheel derailment in advance, and it is possible to provide a retrofittable wheel derailment prevention device for vehicles with a simple configuration that reduces parts costs.

[0019] Preferably, the wheels are rear wheels, The rear wheels are arranged on one side of the vehicle width direction on two or more axes in the front-rear direction of the vehicle and in two rows in the vehicle width direction, The sensor unit is provided so as to be able to detect the states of the plurality of rear wheels independently of each other.

[0020] According to this configuration, the wheels are rear wheels, and the rear wheels are arranged on two or more axes in the fore-and-aft direction of the vehicle on one side of the vehicle width and in two rows in the vehicle width direction, and the sensor unit is arranged so that it can detect the state of each of the multiple rear wheels independently, so that even in large vehicles with many wheels, it is possible to detect wheel slippage in advance, and it can be made into a retrofittable wheel slippage prevention device for vehicles with a simple configuration that reduces parts costs.

[0021] Preferably, the sensor section includes a beam sensor that detects the beam, and a mudguard section that protects the beam sensor.

[0022] According to this configuration, the sensor unit includes a beam sensor that detects the beam and a mudguard that protects the beam sensor, so the beam sensor is protected from mud and the like, and wheel wobble can be detected without mistaking splashing mud for wheels. Therefore, even for large vehicles with many wheels, it is possible to detect wheel derailment in advance, and it is possible to provide a retrofittable wheel derailment prevention device for vehicles that has a simple configuration and reduces parts costs.

[0023] Preferably, the sensor unit includes a base attached to the vehicle body, a movable member mounted on the base so as to be movable laterally, and the beam sensor mounted on the movable member so as to be movable vertically.

[0024] According to this configuration, the sensor unit includes a base attached to the vehicle body, a movable member attached to the base so as to be movable laterally, and a beam sensor attached to the movable member so as to be movable vertically, so that the position of the laser beam can be easily fine-tuned after the base is attached to a wheel house, etc. This eliminates the need to reattach the sensor unit, and makes it possible to detect wheel derailment in advance even for large vehicles with many wheels, and to provide a retrofittable vehicle wheel derailment prevention device with a simple configuration that reduces parts costs.

[0025] Preferably, the sensor unit includes a wire stretched in the longitudinal direction of the vehicle, and detects contact of the wheel with the wire.

[0026] With this configuration, the sensor unit includes a wire stretched in the longitudinal direction of the vehicle and detects when a wheel comes into contact with the wire, so the simple analog configuration can further reduce parts costs. Therefore, even for large vehicles with many wheels, it is possible to detect wheel derailment in advance, and it is possible to provide a retrofittable vehicle wheel derailment prevention device with a simple configuration that reduces parts costs. [Effects of the Invention]

[0027] To provide a vehicle wheel derailment prevention device that can be retrofitted to detect wheel derailment in advance even for a large vehicle with many wheels, and that has a simple configuration to reduce component costs. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a side view illustrating an example of a vehicle equipped with a vehicle wheel derailment prevention device according to an embodiment. [Figure 2] Fig. 2(A) is a plan view illustrating an example of a vehicle equipped with a wheel derailment prevention device for a vehicle according to an embodiment, and Fig. 2(B) is an enlarged view of a main part near a wheel at the left rear of the vehicle in Fig. 2(A). [Figure 3] Fig. 3(A) is an explanatory view of a vehicle wheel derailment prevention device according to an embodiment, as seen from the side of the vehicle, and Fig. 3(B) is an explanatory view of a vehicle wheel derailment prevention device according to another embodiment, as seen from the side of the vehicle. [Figure 4] 1 is an explanatory diagram of a vehicle wheel separation prevention device at the left rear of a vehicle according to an embodiment, as viewed from behind; [Figure 5] 1 is a perspective view illustrating a front part of a wheel house of a vehicle wheel derailment prevention device at the left rear of a vehicle according to an embodiment. FIG. [Figure 6] 1 is a perspective view illustrating a rear portion of a wheel house of a vehicle wheel derailment prevention device at the left rear of a vehicle according to an embodiment. FIG. [Figure 7]7A and 7B are perspective views of the laser beam emitting side and the laser beam receiving side of the vehicle wheel derailment prevention device according to the embodiment, respectively. [Figure 8] 8A is a diagram illustrating the operation of the vehicle wheel derailment prevention device according to the embodiment in a normal state, and FIG. 8B is a diagram illustrating the operation of the vehicle wheel derailment prevention device according to the embodiment when detecting a wheel. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings, which are intended to conceptually (schematically) illustrate a vehicle wheel derailment prevention device. [Example]

[0030] As shown in Figures 1 and 2, the vehicle 10 on which the vehicle wheel separation prevention device 30 is installed is a large truck and includes a body (body frame) 11, wheels (front wheels) 12 steerably mounted on the front side of the body 11, wheels (rear wheels) 13 rotatably mounted on the rear side of the body 11 via axles 13a, a driver's seat 14 mounted on the front upper side of the body frame 11, wheel houses 15 mounted on the rear side of the body 11 and covering the rear wheels 13, mudguards 19 mounted on the ends of the wheel houses 15 to prevent mud from splashing, a cargo bed 21 mounted on the body 11 above the rear wheels 13, and side bumpers 25 mounted below the widthwise ends of the cargo bed 21 and extending in the fore-and-aft direction of the vehicle to protect the body 11.

[0031] The wheels 13 detected by the vehicle wheel separation prevention device 30 are rear wheels 13 that are rotatably mounted on the body 11 of the vehicle 10 via axles 13a when not being steered. The rear wheels 13 are arranged in two rows in the vehicle width direction, with two axles (two axles 13a) in the front-to-rear direction of the vehicle, on one side in the vehicle width direction.

[0032] Next, the vehicle wheel derailment prevention device 30 will be described. The vehicle wheel derailment prevention device 30 detects the state of the wheels (rear wheels) 13 of the vehicle 10 to prevent the wheels from derailing in advance. The vehicle wheel derailment prevention device 30 includes a sensor unit 31 that is provided outward in the vehicle width direction of the wheels (rear wheels) 13 and in front of and behind the wheels (rear wheels) 13 and that detects movement of the wheels (rear wheels) 13 in the vehicle width direction, and alarm units 22, 23, 24 that are provided in the driver's seat 14 of the vehicle 10 and that notify that the wheels (rear wheels) 13 have been detected by the sensor unit 31.

[0033] The alarm units 22, 23, 24 include visual alarm units 22, 23 and an audible alarm unit 24. The visual alarm units 22, 23 are a monitor 22 and a lamp 23. The audible alarm unit 24 is a speaker 24.

[0034] 3(A) and 4, in the vehicle wheel derailment prevention device 30, the pair of sensor units 31 (beam sensors 36) are provided so as to be able to detect the states of the two rear wheels 13 (the two outer rear wheels 13 aligned in the front-to-rear direction) on the outer two axles in the vehicle width direction. The sensor units 31 (beam sensors 36) are provided at the outer end portions in the vehicle width direction of the front portion 16 and the rear portion 18 of the wheel house 15.

[0035] The sensor unit 31 (beam sensor 36) is arranged to be able to detect the state between the rear wheels 13 for the two axles on the inside in the vehicle width direction (the two inner rear wheels 13 aligned in the front-to-rear direction) and the rear wheels 13 for the two axles on the outside in the vehicle width direction (the two outer rear wheels 13 aligned in the front-to-rear direction), and is provided so that the rear wheels 13 for the two axles on the inside in the vehicle width direction (the two inner rear wheels 13 aligned in the front-to-rear direction) can be detected by the pair of sensor units 31 (beam sensor 36). The sensor unit 31 (beam sensor 36) is provided in the center of the front part 16 and the rear part 18 of the wheel house 15 in the vehicle width direction. A detection signal detected by the sensor unit 31 is transmitted to the alarm units 22, 23, 24 via wiring 37 and a control unit (not shown). Note that, although wiring 37 is used in the embodiment, the present invention is not limited to this, and wireless transmission and reception of signals may also be used.

[0036] As shown in Figure 3(B), the wheels 13 are rear wheels 13. The rear wheels 13 are arranged on one side in the vehicle width direction, on two axes in the front-rear direction of the vehicle and in two rows in the vehicle width direction. In the vehicle wheel-off prevention device 30, the sensor units 31 are provided so as to be able to independently detect the state of each of the four rear wheels 13. The sensor units 31 (beam sensors 36) are provided one each at the outer end and center in the vehicle width direction of the front part 16 of the wheel house 15, two each at the outer end and center in the vehicle width direction of the upper part 17 of the wheel house 15, and one each at the outer end and center in the vehicle width direction of the rear part 18 of the wheel house 15.

[0037] Another embodiment of a vehicle wheel derailment prevention device 30 will now be described. As shown in Figures 5, 6 and 7(A), in the vehicle wheel derailment prevention device 30, the sensor unit 31 comprises a base 32 attached to the vehicle body 11, a movable member 34 mounted on a horizontal rail 33 of the base 32 so as to be movable laterally, a beam sensor 36 mounted on a vertical rail 35 of the movable member 34 so as to be movable vertically and which emits or detects a beam, an upper mudguard unit 36a mounted above the beam sensor 36 to protect the beam sensor 36 by preventing muddy water from entering from above, and a lower mudguard unit 36b mounted below the beam sensor 36 to protect the beam sensor 36 by preventing muddy water from entering from below.

[0038] In the sensor unit 31, the beam sensor 36 irradiates (projects) a beam (laser beam, light) B (see FIG. 2), and by providing a pair of sensor units 31, it functions as a transmission type laser sensor, with one being a light projecting unit and the other being a light receiving unit. When the pair of sensor units 31 is a transmission type laser sensor, the sensor unit 31 emits a detection signal when the laser beam B is blocked by the rear wheel 13.

[0039] In the embodiment, the pair of sensor units 31 are transmission type laser sensors, but the present invention is not limited to this and the pair of sensor units 31 may be reflective type laser sensors. In this case, as shown in Fig. 7(B), one of the sensor units 31 may be provided with a receiving base 36c and a reflecting unit 36d, and the other beam sensor 36 (see Fig. 7(A)) may have a light-emitting unit and a light-receiving unit integrated into one unit. In the case of a transmission type laser sensor, the sensor unit 31 also emits a detection signal when the laser beam B is blocked by the rear wheel 13.

[0040] Next, the operation of the vehicle wheel derailment prevention device 30 of the embodiment described above will be explained. Figure 8(A) is a diagram showing the operation of the vehicle wheel derailment prevention device 30 of the embodiment under normal conditions. Since the rear wheel 13 is rotating without wobbling, the laser beam B of the sensor unit 31 (beam sensor 36) is not blocked, and therefore no detection signal is emitted.

[0041] 8(B) is an operational diagram of the vehicle wheel derailment prevention device 30 according to the embodiment when detecting a wheel, in which the rear wheel 13 wobbles as indicated by the arrow (1), so that the laser beam B of the sensor unit 31 (beam sensor 36) is interrupted at the position Z where the rear wheel 13 wobbles, and a detection signal is emitted. The alarm units 22, 23, 24 that receive the detection signal display a warning on the monitor 22, light or flash the lamp 23, or emit a warning sound from the speaker 24. This allows the driver to detect the signs of the rear wheel 13 derailing before it actually does so.

[0042] Furthermore, the distance between the wheel (rear wheel) 13 and the laser beam B in a normal state may be set appropriately to 1 cm, 2 cm, 3 cm, or the like depending on the size of the wheel (rear wheel) 13, etc.

[0043] Next, the effects of the dual-use wheel derailment prevention device 30 described above will be described. According to the configuration of the embodiment of the present invention, the vehicle wheel derailment prevention device 30 is rotatably mounted on the body 11 of the vehicle 10 via the axle 13a with the wheels 13 not being steered, and is equipped with sensor units 31 that are provided outward in the vehicle width direction of the wheels 13 and in front and behind the wheels 13 and detect movement of the wheels 13 in the vehicle width direction, so that the device can be easily retrofitted inside the wheel house 15 or the like as long as the sensor units 31 are located in the position of the sensor units 31. Furthermore, the device is equipped with alarm units 22, 23, 24 that are provided in the driver's seat 14 of the vehicle 10 and that notify that the wheels 13 have been detected by the sensor units 31, so that even for a large vehicle 10 with a large number of wheels 13, the vehicle wheel derailment prevention device 30 can be made to be retrofittable, capable of detecting derailment of the wheels 13 in advance, and capable of reducing parts costs with its simple configuration.

[0044] Furthermore, the alarm units 22, 23, 24 are equipped with visual alarm units 22, 23 and sound alarm unit 24, so that signs of wheel run-off can be reliably notified visually and soundwise. Furthermore, by using an existing monitor 22 or an inexpensive lamp 23 as the visual alarm units 22, 23, and by using an existing speaker 24 as the sound alarm unit 24, the cost of parts can be reduced.

[0045] Furthermore, the wheels 13 are rear wheels 13, and the rear wheels 13 are arranged on one side of the vehicle width direction on two or more axes in the fore-and-aft direction of the vehicle and in two rows in the vehicle width direction, and the sensor units 31 are arranged so that the rear wheels 13 for two or more axes on the outer side in the vehicle width direction can be detected by a pair of sensor units 31, so even if there are multiple wheels 13, a pair of sensor units 31 can be used, and even in the case of a large vehicle 10 with a large number of wheels 13, it is possible to detect the wheels 13 from coming off in advance, and it is possible to create a retrofittable vehicle wheel off prevention device 30 with a simple configuration that reduces parts costs.

[0046] Furthermore, the sensor 31 is arranged to be able to detect the state between the two or more axles of rear wheels 13 on the inside in the vehicle width direction and the two or more axles of rear wheels 13 on the outside in the vehicle width direction, so it is possible to detect not only the state of the wheels 13 on the inside in the vehicle width direction, but also the state of the wheels 13 on the outside in the vehicle width direction. Therefore, even for a large vehicle 10 with a large number of wheels 13, it is possible to detect wheel derailment of the wheels 13 in advance, and it is possible to provide a retrofittable vehicle wheel derailment prevention device 30 with a simple configuration that reduces parts costs.

[0047] Furthermore, the wheels 13 are rear wheels 13, and the rear wheels 13 are arranged on two or more axes in the fore-and-aft direction of the vehicle on one side of the vehicle width direction and in two rows in the vehicle width direction, and the sensor unit 31 is arranged to be able to detect the state of each of the multiple rear wheels 13 independently, so that even in a large vehicle 10 with a large number of wheels 13, it is possible to detect wheel 13 coming off the road in advance, and it is possible to create a retrofittable vehicle wheel off prevention device 30 with a simple configuration that reduces parts costs.

[0048] Furthermore, the sensor unit 31 includes a beam sensor 36 that detects the beam (laser beam) B, and mudguard units 36a, 36b that protect the beam sensor 36, so that the beam sensor 36 is protected from mud and the like, and can detect the wobble of the wheels 13 (the wheels 13 shaking) without mistaking splashing mud for the wheels 13. Therefore, even for a large vehicle 10 with many wheels 13, the wheel derailment prevention device 30 can be made to be able to detect the wheels 13 coming off the road in advance, and can be made to have a simple configuration that reduces parts costs and can be retrofitted.

[0049] Furthermore, the sensor unit 31 includes a base 32 attached to the vehicle body 11, a movable member 34 attached to the base 32 so as to be movable laterally, and a beam sensor 36 attached to the movable member 34 so as to be movable vertically, so that the position of the laser beam B can be easily fine-tuned after the base 32 is attached to the whole house 15 or the like. This eliminates the need to reattach the sensor unit 31, and enables the wheel derailment prevention device 30 for a vehicle to be retrofitted so as to be able to detect wheel derailment in advance even for a large vehicle 10 having a large number of wheels 13, and to reduce parts costs with its simple configuration.

[0050] Furthermore, the sensor unit 31 includes a wire B stretched in the longitudinal direction of the vehicle and detects contact of the wheel 13 with the wire B, and thus has a simple analog configuration, which allows for further reduction in parts costs. Therefore, even for a large vehicle 10 with a large number of wheels 13, it is possible to detect wheel 13 coming off the road in advance, and the vehicle wheel off prevention device 30 can be made to be retrofittable, allowing for reduction in parts costs with its simple configuration.

[0051] In the embodiment, the sensor unit 31 detects the laser beam B, but the present invention is not limited to this, and the sensor unit 31 may employ a wire B stretched in the longitudinal direction of the vehicle and detect contact of the wheel 13 with the wire B. In other words, the sensor unit 31 includes a wire B stretched in the longitudinal direction of the vehicle and detects contact of the wheel 13 with the wire B.

[0052] In addition, in the embodiment, the sensor unit 31 is also provided between the two rear wheels 13 lined up in the vehicle width direction, but this is not limited to this, and the sensor unit 31 may be provided only on the outside of the rear wheel 13 that is on the outer side in the vehicle width direction. In addition, in the embodiment, the alarm unit is the monitor 22, the lamp 23, and the speaker 24, but it is not necessary to use all of these, and it is sufficient to use at least one of them.

[0053] In addition, in the embodiment, the number of axles of the rear wheels 13 is two, but this is not limited thereto and may be one, three or more. In addition, in the embodiment, the number of rows of the rear wheels 13 on one side in the vehicle width direction is two, but this is not limited thereto and may be one, three or more.

[0054] In addition, in the embodiment, the sensor unit 31 is provided in the wheel house 15, but this is not limitative and it may be attached to the side bumper 25, the vehicle body (vehicle body frame) 11, or the like.

[0055] Furthermore, in the embodiment, the vehicle 10 is a truck, but is not limited to this, and the vehicle 10 may be a large vehicle such as a trailer or a dump truck.

[0056] That is, the present invention is not limited to the examples as long as the functions and effects of the present invention are exhibited. [Industrial Applicability]

[0057] The technology of the present invention is suitable for a vehicle wheel derailment prevention device that detects the state of a vehicle's wheels and prevents the wheels from derailing in advance. [Explanation of symbols]

[0058] 10...Vehicle (truck) 11...Body (body frame) 12...Wheels (front wheels) 13...Wheel (rear wheel) 13a...Axle 14...Driver's seat 15...Wheelhouse 16...Front of wheelhouse 17...Upper part of wheelhouse 18...Rear of wheelhouse 21...Cargo bed 22...Alarm unit (visual alarm unit, monitor) 23...Alarm unit (visual alarm unit, lamp) 24...Alarm unit (sound alarm unit, speaker) 25...Side bumper 30...Vehicle wheel derailment prevention device 31...Sensor unit (tension detection unit) 32...Bass 34...moving member 36...Beam sensor (irradiation part, light-emitting part, light-receiving part) 36a...Upper mudguard 36b...Lower mudguard 36c...Uke base 36d…Reflection part B...Beam (laser beam, wire)

Claims

1. A vehicle wheel derailment prevention device that detects the state of a vehicle's wheels and prevents the vehicle from derailing in advance, The wheels are rotatably mounted on the body of the vehicle via axles in an unsteered state, sensor units provided outward in the vehicle width direction from the wheels and in front and behind the wheels, respectively, for detecting movement of the wheels in the vehicle width direction; and an alarm unit provided in the driver's seat of the vehicle for notifying the driver that the wheel has been detected by the sensor unit.

2. The vehicle wheel derailment prevention device according to claim 1, The vehicle wheel derailment prevention device is characterized in that the alarm unit includes a visual alarm unit and an audible alarm unit.

3. The vehicle wheel derailment prevention device according to claim 1 or 2, the wheels are rear wheels, The rear wheels are arranged on one side of the vehicle width direction in two or more axles in the front-rear direction of the vehicle and in two rows in the vehicle width direction, A vehicle wheel separation prevention device characterized in that the sensor unit is configured so that a pair of the sensor units can detect the state of the rear wheels of two or more axles located on the outside in the vehicle width direction.

4. The vehicle wheel derailment prevention device according to claim 3, The sensor unit is arranged so as to be able to detect the condition between the rear wheels on two or more axles on the inside in the vehicle width direction and the rear wheels on two or more axles on the outside in the vehicle width direction, and is characterized in that the pair of sensor units is configured so as to be able to detect the rear wheels on two or more axles on the inside in the vehicle width direction.

5. The vehicle wheel derailment prevention device according to claim 1 or 2, the wheels are rear wheels, The rear wheels are arranged on one side of the vehicle width direction in two or more axles in the front-rear direction of the vehicle and in two rows in the vehicle width direction, The vehicle wheel separation prevention device is characterized in that the sensor unit is configured to be able to detect the states of the multiple rear wheels independently of each other.

6. The vehicle wheel derailment prevention device according to claim 1 or 2, The sensor unit includes a beam sensor that detects a beam, and a mudguard unit that protects the beam sensor.

7. The vehicle wheel derailment prevention device according to claim 6, A vehicle wheel-off prevention device characterized in that the sensor unit comprises a base attached to the vehicle body, a movable member mounted on the base so as to be movable laterally, and the beam sensor mounted on the movable member so as to be movable vertically.

8. The vehicle wheel derailment prevention device according to claim 1 or 2, The sensor unit includes a wire stretched in the longitudinal direction of the vehicle, and detects when the wheel comes into contact with the wire.

Images