JPS5848206Y2 - Vehicle left turn accident prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing left turn accidents of vehicles, especially large trucks.

Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No. 53-279
As shown in Publication No. 32 or Japanese Utility Model Publication No. 53-10020, devices related to the operating direction of the vehicle,
For example, a combination of a device linked to a direction indicator or a steering system and a device that detects and warns of obstacles is known.

This device can be said to be an effective method to prevent entanglement when turning left, but whenever the turn signal is operated or the steering wheel is operated, preparations are made to detect obstacles to the side and issue a warning. Therefore, the warning system is activated even when the vehicle changes course during normal driving.

This course change occurs frequently when the vehicle is running, and the warning device is activated each time it occurs.

However, if this device is used for the purpose of preventing left-turn accidents at intersections, etc., which have become a social problem in recent years, the device will cause considerable damage if the warning device is activated every time the course is changed. This causes a problem that the function becomes less effective in achieving the above-mentioned purpose.

If the original function of the alarm device is weakened, it is not preferable in terms of safety.

The present invention has focused on this point, and has been developed with the aim of further improving safety by making the warning device operate most effectively for the purpose of preventing accidents when turning left.The following is an example of the invention. will be explained using drawings.

In Figure 1, 1 is a power source (battery), 2 is an ignition key switch, 3 is a turn signal switch, and 4 is a turn signal switch.
5 is a vehicle speed detection device, 5 is a steering angle detection device, 6 is a supplementary device, and 7 is a warning device such as a buzzer.

The turn signal switch 3 is turned on only when the turn signal operation lever (not shown) is operated in the left turn direction.
is configured to do so.

The vehicle speed detection device 4 consists of a vehicle speed detection means and a switch mechanism that operates ON-OFF according to the signal thereof.The vehicle speed detection means may include, for example, a tachogenerator attached to the transmission and converting the vehicle speed into voltage. The switch mechanism receives the signal and is assumed to have a switch whose operating range is determined so that, for example, the vehicle speed is ON from zero to 20 km/h and OFF when it exceeds that, it is assumed that there are 3 steering angles. The detection device 5 is constituted by, for example, a self-holding reed switch mechanism provided between the steering drop arm and the chassis, and detects a rotation angle of 250° or more in the left-turn direction of the steering wheel according to the movement of the drop arm when turning left. It is configured to be turned OFF when the handle is returned to its original position and the magnet is again in the return position with the reed switch.

The supplementary device 6 is installed at an appropriate position on the left side in the direction of travel of the vehicle, and is a device that detects obstacles such as pedestrians and bicycles, especially within the position (danger range), that may get caught in the rear wheels when turning left. It is.

This uses, for example, infrared rays, radio waves, ultrasonic waves, etc., and detects the reflection when an obstacle enters the above range, and turns on.

The alarm device T is constituted by an alarm means such as a buzzer or a flashing lamp provided in the driver's cab.

The alarm device 7 is configured to operate only when the switch 3 and the devices 4, 5, and 6 are all turned on.

When a large truck with the above configuration turns left,
Not only switch 2 but also turn signal switch 3 is turned on.

If the vehicle speed is within 20 km/h, the vehicle speed detection device 4 is turned on.

Further, when the rotation angle of the steering wheel exceeds, for example, 250 degrees, the steering angle detection device 5 is turned on.

At this time, if an obstacle falls into the dangerous area, the supplementary device 6 will not operate, and the alarm device 7 will also not operate.In the above case, if there is an obstacle, the supplementary device 6 will catch it and turn on. As a result, the alarm device 7 is activated to notify the driver of the danger and prevent accidents from occurring.

As mentioned above, in the embodiment shown in FIG. 1, since the turn signal switch 3 is included in the configuration, it may be turned off due to forgetting to operate it when making a left turn, or it may be turned off just before a left turn, as in the case of a large truck, etc. When turning left after turning to the right, even if the turn signal switch 3 is turned ON by operating the turn signal switch 3 in advance, the cancellation device will turn it OFF, and the operation will depend on the driver's will, and the warning will be activated. It is possible that the device may not work when it should (as long as you keep this in mind and drive correctly, there will be no problem).

Therefore, in the embodiment shown in FIG. 2, from the configuration shown in FIG.
This shows a device in which the turn signal switch 3 has been removed (the same parts as in Figure 1 are indicated by the same symbols).According to this, the device always operates when turning left, regardless of the driver's intention. The problems mentioned above (whether they can be called problems or not) will disappear.

In the present invention, the vehicle speed detection device 4 is used to activate the warning device only within a certain vehicle speed range.
In order to prevent accidents that often occur when turning left at low speeds, the warning device can be activated at a selected vehicle speed, which prevents the warning device from being activated unnecessarily due to a general course change, thereby preventing left turn accidents. It can function as an original alarm device.

This makes it possible to significantly improve safety when turning left.

Furthermore, in the present invention, since the turn signal switch 3 and the steering angle detection device 5 are provided in series,
The noise that occurs when only a turn signal switch is used (even guardrails are detected as obstacles when the vehicle is stopped) can be prevented, further improving safety.

According to the present invention, it is possible to automatically detect danger when a vehicle turns left and warn the driver, so when used in conjunction with a rearview mirror, etc., it is extremely useful in preventing accidents when turning left. .

[Brief explanation of the drawing]

FIG. 1 is a diagrammatic layout of the present invention, and FIG. 2 is a diagram similar to FIG. 1, showing another embodiment. Code, 1...Power supply, 2...Ignition key switch, 3...Turn signal switch, 4...Vehicle speed detection device, 5...・Steering angle detection device, 6... Complementary device, 7
...Alarm device.

Claims (1)

[Scope of utility model registration request] A turn signal switch 3 that is turned ON in response to the vehicle's left turn signal operation, and a turn signal switch 3 that is turned ON when the vehicle speed is within a predetermined range.
The vehicle speed detection device 4 is activated, the steering angle detection device 5 is activated when the steering wheel is turned to the left by a predetermined angle or more, and the steering angle detection device 5 is activated when an obstacle within the dangerous range is detected.
The vehicle is equipped with a complementary device 6 that operates, and a warning device 7, and is configured such that the warning device 7 is activated only when the turn signal switch 3, vehicle speed detection device 4, steering angle detection device 5, and complementary device 6 are all turned on. A left turn accident prevention device for vehicles, which is characterized by: