JPS616800A - Traffic signal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for sequentially extinguishing arrow indicators over time in a traffic signal equipped with arrow indicator lights.

Previously, drivers were worried about entering an intersection because it was unclear how much time had passed since the arrow signal was displayed.

In addition, if the arrow goes out when a vehicle enters an intersection, the driver facing it may be too fast to stop at the stop line, and it is often dangerous to continue through the intersection.

Furthermore, when we look at violations of the Road Traffic Act at intersections for right turns and left turns, we find that in the case of right turns, there are more traffic light violations, followed by right turn method and obstructing pedestrians; in the case of left turns, there are fewer traffic light violations than right turns. Interference with people crossing the road will increase.

In view of the current situation, the purpose of the present invention is to alleviate the driver's anxiety and frustration and prevent accidents by giving advance notice and sequentially extinguishing the arrow displays.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, a plurality of arrow indicator lights are provided and a shielding plate is provided between each lamp.

There may be more than one lamp, but the number is not fixed.

For convenience, the number was set to three.

As for the operating method, periodic control is preferable, and the turn-off sequence and time wIM of the lamps are automatically performed.

First, all the lamps are turned on and turned off one by one by the control unit.

FIG. 2 shows the arrow display by this device.

Since the lights are turned off multiple times, it prevents drivers from entering intersections and allows them to stop at the stop line quickly.

This is based on the fact that when the signal display changes, the probability that a vehicle will stop at the stop line is considered to be a function of deceleration, and increasing vehicle deceleration is an effective means for preventing accidents.

In addition, as shown in Figure 3, if the driver is turning right at point α when the arrow indicator goes out, the driver in this state will be worried about vehicles coming from the Y direction and the pedestrian crossing in the x' force direction. There are cases.

Signal displays have a full red time for clearing vehicles, and the setting of this time is related to the approaching speed of cars and the width of the intersection.

For example, the approaching speed of the vehicle is 30 h/h1 and the width of the intersection is 20 h.
In the case of 711, the full red time is 1 second, and a driver in this condition is at risk of causing a secondary accident.

Also, regarding the turning radius and speed of turning inside an intersection, the turning speed is determined from the turning radius, gravitational acceleration, and road surface friction coefficient, and is limited to a certain value, and turning at a speed higher than that is prohibited. This deviates from the originally ideal turning trajectory within the intersection.

In the case of the above-mentioned intersection, the turning speed of cars in a queuing state is around 14 kV'h, but this is a speed of 3.8 m/s, and it may not be possible to quickly pass out of the intersection.

For these reasons, giving advance notice to the arrow display and turning it off is effective in preventing accidents.

Next, the same effect can be obtained by sequentially turning off the lights as described in claim 2.

FIG. 4 shows a -@II sectional view of this device.

After the arrow indicator light is activated, the shielding plate (5) is moved in the direction of the arrow by the gear (2) of the reversible motor (1) and the feed shaft gear (3).

The shielding plate (6) causes the arrow indicator light to disappear over time, thereby preventing the driver from entering the intersection unnecessarily, and alleviating the driver's frustration that tends to occur at the change of traffic lights.

When the arrow indicator light lights up, the make contact of relay Re1 of the control circuit is turned on, and at the same time, relay Rea and timer T are activated.

When the shielding plate (5) returns to its original position, the make contact of the instantaneous action time limit return timer T is put in parallel with the microswitch 1 to assist the operation.

When the shielding plate (5) moves to the end point, the microswitch 2 is pressed to turn it off.

When microswitch 2 is turned OFF, the contacts of relay Ret change the connection of the reversible motor, and relay ne
When t is ON, the rotation is forward, and when it is OFF, the rotation is reverse.

At the same time as the shielding plate (5) completely covers the arrow, or after that, the indicator light is turned off.

Note that the shielding plate (5) is fixed by a guide, and the feed screw (4) is fixed by a bearing or the like.

In addition, by installing a transmission device, the lights-out time can be adjusted,
It is possible to display information according to traffic volume.

As described above, the traffic signal of the present invention prevents accidents at intersections and alleviates driver anxiety by giving advance notice.

[Brief explanation of the drawing]

FIG. 1 is a front view of a traffic light equipped with a plurality of arrow indicator lights, and FIG. 2 is a front view showing the order of operation. FIG. 3 is a plan view of the intersection. FIG. 4 is a front view of a traffic light showing an embodiment of the present invention. 1...Reversible motor, 2...Gear. 3...Feed shaft gear, 4...Feed screw.

Claims (1)

[Scope of Claims] 1. A traffic signal equipped with an arrow indicator light, characterized in that it is equipped with a lamp device for turning on or off the arrow indicator, and turns off the light sequentially over time. . 2. Claim 1, characterized in that it is equipped with a plurality of lamps for turning on or off, and a shielding plate is provided between the lamps, and the operating time is set by a timer, so that the lamps are controlled multiple times. Traffic lights as described in section. 3. Claim 1, characterized by using a reversible motor, a reciprocating moving body, a feed screw for operating the moving body, and a microswitch to turn off the arrow indicator lights sequentially over time. Traffic lights as described in section.