JPS625758Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-light road traffic signal for displaying road traffic signals.

Conventionally, there has been a traffic light that uses a plurality of lamps having lenses and light sources of different colors arranged vertically or horizontally, but these have the disadvantage of being large in weight and size. Also, some of the signals used for railways are single-lamp type signals that have multiple filters attached to one focal point of an ellipsoidal mirror so that they can be displaced to change the color of the light. Because the filter is placed in a similar position, the luminous flux density at the filter is high, and it has the disadvantage of being heated and deteriorating.

An object of the present invention is to solve the above-mentioned drawbacks and provide a single-light road traffic signal that is lightweight and compact, and whose filter does not deteriorate.

In order to achieve this objective, the present invention forms a light projecting means by a light source located at the focal point of a concave mirror and a concave mirror that reflects the light beam from the light source parallel to the optical axis, and combines the light projecting means and a lens. Two rotary shafts are rotatably arranged between the optical axis and the optical axis, and a plurality of color filters each displaying a plurality of signals are attached radially to each rotary shaft at a predetermined angle. Rotating the shaft by the predetermined angle for each movement,
The present invention is characterized in that a drive means is provided for positioning the filters of the same color attached to the two rotating shafts to positions across the entire optical path.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the drawings.

1 to 3 show an embodiment of the present invention. In FIG. 1, a light box 1 is provided with a parabolic mirror 2 and a light source 3 located at the focal point of the parabolic mirror 2 at the rear, and the optical axis reflected by the parabolic mirror 2 is A light beam parallel to 4 is transmitted through a lens 5 attached to the front of the lantern 1 and projected to the outside. In the optical path of the light beam from the parabolic mirror 2 to the lens 5, there are vertical rotation axes 6,
6' is rotatably provided, and plate-shaped color filters G, Y, R, G',
Y′ and R′ are attached. The color filters G to R' rotated by the rotation shafts 6 and 6' are always mounted so that the same color filters G and G', Y and Y', or R and R' are arranged in pairs and cross the optical path. It will be done. Color filters G and G', Y and Y', and R and R' represent three types of signals. Also, elastically attached shielding plates 9 and 9' are provided inside the rear part of the lamp box 1 to prevent unnecessary light from leaking outside.

As shown in FIGS. 2 and 3, the lower part of the lamp box 1 includes rotating shafts 6, 6' and color filters G~
A motor 10 for driving R' is provided, and a motor shaft 1
1 includes a drive gear 13 that engages with a transmission gear 12 that rotates integrally with the lower rotating shaft 6', a cam 16 that contacts the movable piece 15 of the micro switch 14 with a contour curve, and a solenoid 17. The plunger 18 engages with the motor shaft 11 and the driving gear 13.
Disk-shaped stopper 19 that determines the angle of the stop position of
and can be attached. The transmission gear 12 that engages with the drive gear 13 also engages with another transmission gear 20 that rotates together with the upper rotating shaft 6. The cam 16 and the stopper 19, which rotate together with the motor shaft 11, both rotate in the direction of the arrow 21. The cam 16 pushes and releases the movable piece 15 of the micro switch 14 every half rotation.
It has a contour curve that turns the micro switch 14 on and off. Plunger 18 of solenoid 17
The stopper 19, which engages with the plunger 18, has a contour curve whose radial length decreases as it rotates, and when it rotates once from the maximum radius portion to the minimum radius portion, it engages with the plunger 18, Motor shaft 11
It has a recess 22 that determines the stopping position.

Next, the operation will be explained. When the light source 3 is turned on, the light beam created by the parabolic mirror 2 and parallel to the optical axis 4 passes through the color filters G,
It passes through G' and the lens 5 and displays a green signal to the outside. Next, when a command signal to change the signal is transmitted to the solenoid 17 and the motor 10, the plunger 18 of the solenoid 17, which was regulating the rotation of the stopper 19,
The drive gear 13, cam 16, and stopper 19, which rotate together with the motor shaft 11, are rotated by the motor 10. The motor 10 is energized while the cam 16 pushes the movable piece 15 of the micro switch 14, that is, during the first half of the rotation, and during the second half of the rotation, the movable piece 15 returns to the position where the micro switch 14 is turned off, and the motor is turned off. Although the power supply to the motor 10 is briefly cut off, the rotation is maintained by the inertia of the motor 10, and one revolution is completed. One rotation of the motor 10 is transmitted via the drive gear 13 to the transmission gear 12 and another transmission gear 20 that engages with it. Each gear 13, 12 and 20
is set with a gear ratio of 1:3:3, so one rotation of the drive gear 13 is made by each transmission gear 1.
2, 20 and a rotating shaft 6 that rotates together with them.
6' is transmitted as one-third rotation of the rotating shaft 6,
The color filters G to R' attached to 6' are also rotated one third in the direction of arrow 23 (Fig. 1), so that G and G' are in the R and R' positions, and R and R' are in the Y position. ，
At the position Y', Y, Y' is transposed to the position G, G'. Since the color filters Y and Y' are placed across the light beam instead of the color filters G and G', the green signal of the color filters G and G' changes to the yellow signal of the color filters Y and Y'. Thus, one signal conversion operation is performed. In addition, the plunger 1 of the solenoid 17 has released the rotation restriction of the stopper 19.
8 fits into the recess 22 of the stopper 19 every rotation of the stopper 19 to regulate its position.
20, the rotating shafts 6, 6' and the respective color filters G to R' are all driven from predetermined positions,
Stops in place. Therefore, the color filters G to R', which stop across the light beam, do not deviate from their predetermined stopping positions and stop. The signal conversion operation described above is repeated every time a command signal to change the signal is transmitted to the solenoid 17 and the motor 10, and each signal is displayed in the order of green, yellow, and red.

According to this embodiment, a single light type is used which displays three types of signals by rotating the color filters G to R', so it can be made lightweight and compact. Furthermore, since parallel light rays are allowed to pass through the color filters, the luminous flux density of the color filters can be reduced, and deterioration due to heating can be prevented. Furthermore, since the color filters are attached to the two rotating shafts, the rotation space for the color filters can be reduced.
It can be downsized.

Although the embodiment of the present invention has been described using a single-lamp road traffic signal that displays three colors, the types and number of colors are not limited to those that display three colors. Furthermore, a spherical mirror can be used instead of the parabolic mirror 2.

In this embodiment, the light source 3 and the parabolic mirror 2 correspond to the light projecting means, and the motor 10, motor shaft 11, drive gear 13, transmission gears 12 and 20, cam 16,
Stopper 19, solenoid 17 and plunger 1
8. The micro switch 14 and the movable piece 15 correspond to driving means.

As described above, according to the present invention, the light projecting means is formed by the light source located at the focal point of the concave mirror and the concave mirror that reflects the luminous flux from the light source parallel to the optical axis, and the light projecting means and the lens Two rotary shafts are rotatably arranged between the optical axis and the optical axis, and a plurality of color filters each displaying a plurality of signals are attached radially to each rotary shaft at a predetermined angle. By rotating the shafts by the predetermined angle for each movement, filters of the same color attached to the two rotating shafts,
Since a driving means for positioning the device across the entire optical path is provided, the color filter can be made lightweight, compact, and at low cost.Moreover, since the color filter traverses the optical path of parallel rays with a uniform light intensity distribution with a low luminous flux density, It is possible to prevent the color filter from deteriorating.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a front view showing a color filter, a rotating shaft, and a driving means in one embodiment of the present invention, and FIG. 3 is a side view showing the driving means in one embodiment of the present invention. 2... Parabolic mirror, 3... Light source, 4... Optical axis, 5
... Lens, 6, 6' ... Rotating shaft, 10 ... Motor, 11 ... Motor shaft, 12, 20 ... Transmission gear, 13 ... Drive gear, 14 ... Micro switch, 15 ... Movable Piece, 16... Cam, 17...
Solenoid, 18...plunger, 19...stopper, 22...recess of stopper, G~R'...color filter.

Claims (1)

[Scope of utility model registration request] In a single light type traffic light equipped with a single light source 3, a concave mirror 2, and a lens 5, the light source 3 is located at the focal point of the concave mirror 2, and the concave mirror 2 reflects the light flux from the light source 3 parallel to the optical axis 4. between the light projecting means 2, 3 and the lens 5, two rotating shafts 6, 6' are rotatably arranged with the optical axis 4 in between, and each rotating shaft is A plurality of color filters G, Y, R, G', Y', R', which respectively display a plurality of signals, are attached radially to the rotating shafts 6, 6' at predetermined angles. The filters G and G', Y and Y', and R of the same color attached to the two rotating shafts 6 and 6' are rotated by the predetermined angle for each operation.
Drive means 10, 11, 12, 13, 14, 15, 1 for positioning R' at a position crossing the front surface of the optical path
6, 17, 18, 19, and 20.