JP2008240470A - Luminous road sign - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminous road sign capable of emitting light by generating electricity utilizing the wind generated on a road or in a tunnel, which can generate the electricity even where the wind speed is low, reduces the installation space, and facilitates the maintenance. <P>SOLUTION: The luminous road sign comprises rotary vanes receiving the force of wind to rotate, a rotary body connected to a rotary shaft of the rotary vanes and rotates around a central axis, a weight member an end part of which is pivoted to a periphery of the central axis of the rotary body so that it may rotate around the end part by a centrifugal force generated as the rotary body rotates, a piezoelectric body hit by the other end part by the rotation of the weight member, so that an electromotive force may be generated, and a luminous body lit by the electromotive force generated by the piezoelectric body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a road light emitting sign that can alert a driver by generating light by using wind generated on a road or in a tunnel to emit light.

In general, road signs are installed on the side of the road for the purpose of position display and alerting. Some of these road signs can alert the driver even in dark places such as at night or in tunnels. A type of thing exists.
The types of road signs that can call attention in dark places can be broadly divided into those that reflect automobile lights and those that emit light by themselves.

  Of these, the former type of sign has the advantage of low maintenance costs because it does not require power, but in view of the fact that there are relatively many vehicles that do not light in the tunnel, it is safe to install in the tunnel. There was a problem in terms of sex.

On the other hand, the latter type of sign is effective in that it can alert a driver of a vehicle that does not light up, but it requires a power for light emission, so that the maintenance cost is high. is there.
In view of this, road signs have been created in which an electromotive force is generated using wind generated on a road or in a tunnel, and the electromotive force is supplied to a light emitter to emit light (for example, the following patent document). (See 1 and 2)
As shown in Patent Documents 1 and 2, such a self-luminous sign is connected to a rotating shaft of a rotating blade (propeller) and a driving shaft of a generator, and the rotating blade is rotated by wind force. Accordingly, the generator is driven, and the power generated thereby is supplied to a light emitting body such as an LED to be lit.

However, the sign having such a structure has a problem that a large torque is required to rotate the drive shaft of the generator.
In order to obtain large rotational torque in rotating blades that rotate by receiving wind power, it is necessary to increase the wind receiving area, that is, to increase the diameter of the rotating blades. The large rotating blade could not be installed.

In addition, when a brush motor is used as a generator, the brush wears with use, so that it is necessary to periodically replace the brush, and there is a problem in that maintenance labor and cost are required.
On the other hand, when a brushless motor is used as a generator, maintenance can be saved, but a larger wind speed (about 5 m / s or more) is required to rotate the motor, so the installation location is very limited. There was a problem of being.

JP-A-11-296123 JP 2000-160517 A

  The present invention has been made to solve the above-described problems of the prior art, and is a sign that can generate and emit light using wind generated on a road or in a tunnel, and the wind speed is high. The present invention provides a road light emitting sign that can generate power even in a small place, requires a small installation space, and is easy to maintain.

  The invention according to claim 1 is a rotating blade that rotates by receiving wind force, a rotating body that is connected to a rotating shaft of the rotating blade and rotates about a central axis, and one end portion around the central axis of the rotating body. A weight member that is pivotally attached and rotates around the one end by centrifugal force generated with the rotation of the rotating body, and an electromotive force is generated by being struck at the other end by the rotation of the weight member. The present invention relates to a road light emitting sign characterized by comprising a piezoelectric body and a light emitting body that is turned on by an electromotive force generated in the piezoelectric body.

  The invention according to claim 2 relates to the road light-emitting sign according to claim 1, wherein a plurality of the weight members are attached at equal angular intervals around the central axis of the rotating body.

  According to a third aspect of the present invention, a plurality of sets of weight members are attached with an interval in the axial direction of the central axis of the rotating body, and the piezoelectric bodies are each of a plurality of sets of weight members. The road light-emitting sign according to claim 2, wherein the road light-emitting sign is arranged at a position corresponding to the set.

  According to a fourth aspect of the present invention, the rotating body has a central axis connected to one end of the rotary shaft of the rotary blade and a through hole through which the central axis is inserted, and is arranged in parallel to each other. The road light-emitting device according to claim 3, further comprising a plurality of rotating disks, wherein the weight members are pivotally attached to the surface of each rotating disk one by one. Regarding signs.

  According to a fifth aspect of the present invention, the shaft serving as the center of rotation of the weight member pivotally attached to each of the plurality of rotating disks is positioned in a different direction when viewed in the direction of the central axis. The road light-emitting sign according to claim 4, wherein the road light-emitting sign is attached at a position that does not overlap an axis that is a rotation center of the weight member.

  The invention according to claim 6 is characterized in that only one end portion of the piezoelectric body is fixed, and the vicinity of the other end portion which is a free end is hit by the weight member. It relates to the road light-emitting sign as described above.

  The invention according to claim 7 is characterized in that a capacitor for accumulating electric power generated in the piezoelectric body is provided in an electric circuit that electrically connects the piezoelectric body and the light emitting body. 6. The road light-emitting sign according to any one of 6 above.

  The invention according to claim 8 relates to the road light-emitting sign according to any one of claims 1 to 7, wherein the light emitter is a light-emitting diode.

  The invention according to claim 9 is characterized in that a lighting unit including the light emitter is configured to be attachable to and detachable from the rotating blade, the rotating body, a weight member, and other parts including the piezoelectric body. The road light-emitting sign according to any one of claims 1 to 8.

  According to the first aspect of the present invention, the electromotive force is generated by hitting the piezoelectric body by the weight member that rotates with the rotation of the rotary blade, and the light emitter is turned on using the electromotive force. Therefore, the torque required for the rotation of the rotary blade can be reduced. Therefore, it is possible to reduce the installation space by reducing the diameter of the rotating blades, and it is possible to generate power and emit light even in a place where the wind speed is low. Also, since there is almost no need for maintenance, maintenance is very easy.

  According to the second aspect of the present invention, a plurality of weight members are attached at equal angular intervals around the central axis of the rotating body, so that the piezoelectric body is intermittently hit with a short cycle. Therefore, the piezoelectric body can be continuously distorted, and the power generation efficiency can be improved.

  According to the invention of claim 3, a plurality of sets of weight members are attached at intervals in the axial direction of the central axis of the rotating body, and the piezoelectric body corresponds to each set of the plurality of sets of weight members. By being arranged in this way, it is possible to strike a plurality of piezoelectric bodies and obtain a large electromotive force.

  According to the invention of claim 4, the rotating body has a central axis connected to one end of the rotary shaft of the rotary blade and a through hole through which the central axis is inserted, and is arranged in parallel to each other. A plurality of rotating disks, and the weight members are pivotally attached to the surface of each rotating disk one by one so that each set of weight members can be rotated by the rotating disks. Positioning can be performed by being sandwiched, the position of the weight member in the axial direction can be stabilized, and the piezoelectric body can be reliably hit.

  According to the fifth aspect of the present invention, when the shaft serving as the rotation center of the weight member pivotally attached to each of the plurality of rotating disks is viewed in the direction of the central axis of the rotating body, Since the weight member of each set strikes the piezoelectric body at different timings, the impact on the central shaft can be dispersed and alleviated. This makes it possible to maintain a stable rotation over a long period of time.

  According to the invention of claim 6, only one end portion of the piezoelectric body is fixed, and the vicinity of the other end portion that is a free end is hit by the weight member, so that the piezoelectric body is hit, Since the vibration with the one end portion as a fulcrum occurs continuously, the power generation efficiency can be improved.

  According to the seventh aspect of the present invention, the electric circuit that electrically connects the piezoelectric body and the light emitter is provided with the capacitor for storing the electric power generated by the piezoelectric body, thereby generating the piezoelectric body. The stored power can be stored in the capacitor and then supplied to the light emitter, and the light emitter can be lit stably.

  According to the eighth aspect of the invention, since the light emitter is a light emitting diode, it is possible to obtain light emission with high luminance with low power consumption.

  According to the invention according to claim 9, since the lighting unit including the light emitter is configured to be detachable with respect to the rotating blade, the rotating body, the weight member, and other portions including the piezoelectric body, When there is a restriction on the space of the installation location, only the lighting unit can be attached to the lower part, and the other parts can be attached to the upper handrail or the like, and installation in a small space becomes possible.

Hereinafter, a preferred embodiment of a road light-emitting sign according to the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 are views showing the entire configuration of a road light-emitting sign according to the present invention. FIG. 1 is an external view, and FIG. 2 is a cross-sectional view.
The road light-emitting sign according to the present invention is generated in a rotating blade (1) that rotates by receiving wind force, a power generation unit (2) that generates power as the rotating blade (1) rotates, and the power generation unit (2). It is comprised from the lighting unit (3) which lights up in response to the received electric power.

The rotary blade (1) is a propeller type in which a plurality of blades are attached radially around a central rotation axis and the wind receiving surface is inclined.
However, in the present invention, the rotating blade (1) is not limited to the propeller type, and other shapes such as a turbine type, a paddle type, a Darius type, a gyro mill type, a saponius type, a multi-wing type, and a sail wing type may be used. It may be adopted.

FIG. 4 is an exploded view of the power generation unit (2).
The power generation unit (2) includes a main body case (4), a weight rotation unit (5), and a piezoelectric body (6).
The main body case (4) is a substantially rectangular parallelepiped case that accommodates the weight rotation unit (5) and the piezoelectric body (6), and is assembled by combining two members, a right half member and a left half member. .
The assembled main body case (4) has a through hole (41) (see FIG. 3) on the upper front side, and one end of the rotating shaft of the rotary blade (1) is inserted through the through hole (41). Then, it is connected to the central axis (described later) of the rotating body disposed in the main body case (4).

FIG. 5 is a perspective view of the weight rotating unit (5), and FIG. 6 is an exploded view thereof.
The weight rotating unit (5) includes a rotating body that is connected to one end of the rotating shaft of the rotating blade (1) and rotates together with the rotating blade, and a weight member (10) attached to the rotating body. Yes.

  The rotating body has a central axis (7) connected to one end of the rotary shaft of the rotary blade (1) and a plurality of holes arranged in parallel with each other having a through hole through which the central axis (7) is inserted. (In the figure, three) rotating disks (8), and a weight member (10) is rotatably attached to the surface of each rotating disk (8) via a rotating shaft (9). It has been.

The weight member (10) is a substantially rectangular parallelepiped member, and has a through hole (101) at one end thereof. And the whole is formed from synthetic resins, such as metals, such as brass, or nylon.
Further, the rotary disk (8) is provided with an insertion hole (81) at a position away from the center (a position near the outer periphery).
The weight member (10) is pivotably attached to the rotating disk (8) by inserting the rotating shaft (9) into the through hole (101) and inserting and fixing it into the insertion hole (81). Is done.

In the present invention, the number of weight members (10) attached to one rotating disk (8) may be one or plural, but a plurality of weight members (10) are arranged at equiangular intervals around the central axis (7). It is preferable to attach.
This is because the piezoelectric material, which will be described later, is intermittently hit with a short cycle, so that the piezoelectric material continues to be distorted and the power generation efficiency is improved.
However, if the number of weight members (10) is too large, the size (length) of the weight member has to be reduced due to space limitations, and the impact force becomes weak. Most preferably, the two weight members (10) are attached to the rotating disk (8) at positions facing each other across the central axis (7) (ie, at an interval of 180 °).

  When the rotating disk (8) rotates together with the central shaft (9), the weight member (10) attached in this way has a rotating shaft pivotally attached to one end by centrifugal force generated with the rotation. It pivots about (9) and opens so that the other end protrudes from the outer shape of the rotating disk (8) (see FIG. 7).

  A disc-shaped metal plate (11) is attached to each end of the central shaft (7) passing through the plurality of rotating discs (8). These two metal plates (11) are arranged in a groove (42) provided in the main body case (4) so that the weight rotating unit (5) can be rotated with respect to the main body case (4). Support.

A plurality of sets (three sets (six sets) in the illustrated example) of the weight members (10) are attached at intervals in the axial direction of the central axis (7) of the rotating body.
By doing so, it becomes possible to strike a plurality of piezoelectric bodies, and a large electromotive force can be obtained.

In the illustrated example, of the three sets (six) of weight members (10), two sets of weight members (10) are sandwiched between the rotating disks (8), and the remaining one set of weight members. (10) is sandwiched between the rotating disc (8) and the disc-shaped stop plate (12).
As described above, by adopting a structure in which the weight member (10) is sandwiched between the disks, the position of the weight member (10) in the axial direction is stabilized, and the piezoelectric body (6) is reliably hit. Will be able to.

When the weight member (10) is rotated (opened) as described above, the piezoelectric body (6) is distorted by being struck by the other end portion and generates an electromotive force. As many as the number of sets of weight members (10) (three in the illustrated example) are arranged at positions where the weight members (10) can be positioned, specifically, at positions below the weight members (10).
The piezoelectric body (6) has a lower end fixed to the body case (4) via a shim (15) by a pressing member (13) and a screw (14), and an upper end is a free end that is not fixed. The upper end near the free end is hit by the weight member (10).
Thereby, after the piezoelectric body (6) is hit, the vibration continues and the distortion in the forward direction and the reverse direction is repeated, and the power generation efficiency can be improved.

The axis (rotation shaft (9)) serving as the rotation center of the weight member (10) pivotally attached to each of the plurality of rotation disks (8) is viewed in the direction of the center axis (7) of the rotating body. Is attached so that the position does not overlap with the axis (rotation axis (9)) serving as the rotation center of the other set of weight members (10).
FIG. 8 schematically shows the positional relationship of the rotating shafts of the weight members of each set when two (one set) weight members are attached to the three rotating disks as shown in FIG. FIG.
FIG. 8 is a view of the rotating disk (8) as viewed in the central axis direction. The position indicated by a black circle in the figure is the position where the rotating shaft of the weight member is attached to the first rotating disk, and is a white circle. The position shown is the attachment position of the rotating shaft of the weight member to the second rotating disk, and the position indicated by the white circle with a mark is the attaching position of the rotating shaft of the weight member to the third rotating disk. Each shows.

As shown in FIG. 8, the mounting position of the rotating shaft of the weight member on the first rotating disk, the mounting position of the rotating shaft of the weight member on the second rotating disk, and the third rotating disk The attachment position of the rotating shaft of the weight member to the head is a position that does not overlap each other.
More specifically, the rotation shafts (9) of the weight members of each set are attached to positions facing each other across the central axis (7) (that is, at intervals of 180 °), and the first rotation disk The rotating shaft of the weight member of the second rotating disk, the rotating shaft of the weight member of the second rotating disk, and the rotating shaft of the weight member of the third rotating disk are attached with their positions shifted by 60 °.

  In this way, by attaching the rotation shafts of the weight members of each set to a positional relationship that does not overlap each other, the weight members (10) of each set hit the piezoelectric body (6) at different timings. Therefore, the impact applied to the central axis (7) as a reaction force to the piezoelectric body can be dispersed and alleviated, and stable rotation can be maintained over a long period of time.

An electrode (61) for taking out the generated electromotive force is provided at the lower end of the piezoelectric body (6), and this electrode (61) is placed inside the body case (4) by a lead wire (not shown). Connected to the attached substrate (16).
An electric circuit, which will be described later, is provided on the surface of the substrate (16), and the current flowing from the piezoelectric body (6) is guided to the lighting unit (3) through the electric circuit on the substrate (16). It is burned.

FIG. 9 shows the entire road light emission sign according to the present invention, and is an exploded view of the lighting unit (3).
The lighting unit (3) includes a substrate (18) having a plurality of light emitters (17) disposed on the surface, a reflector (19) disposed in front of the substrate (18), and the reflector ( 19) and a front cover (21) disposed in front of the transparent cover (20), and a lighting unit (3) comprising these four members. Is fixed to the unit body (22) together with the power generation unit (2).

  The type of the light emitter (17) attached to the substrate (18) is not particularly limited, and may be a light bulb or the like. However, there is a light emitting diode (LED) that has low power consumption and a long life and can obtain high luminance. Preferably used.

  The reflection plate (19) is provided to reflect the light of the automobile, and is composed of a plate with a fluorescent agent attached to the surface, a plate with a reflection seal attached to the surface, or the like. ) Through holes (191) are provided. The surface fluorescent agent and the reflective sticker reflect the headlight of the automobile and serve to alert the driver even when the light emitter (17) is not lit.

  The transparent cover (20) is provided to protect the light emitter (17), and is formed of an acrylic plate, a polycarbonate plate, or the like.

  The front cover (21) is provided to fix the substrate (18), the reflector (19), and the transparent cover (20) to an annular portion (221) described later, and passes the light of the light emitter (17). A through hole (211) for fixing and a female thread portion (212) for fixing.

The unit body (22) has a small annular portion (221) on the front side and a large annular portion (222) on the rear side, and these two annular portions (221) and (222) are formed at the lower end. They are integrally connected by the planar portion (223).
A substrate (18), a reflecting plate (19), a transparent cover (20), and a front cover (21) are fixed inside the small annular portion (221) in front by screws (23). In addition, the rotary blade (1) is disposed inside the large rear annular portion (222), and the power generation unit (2) is fixed to the upper surface of the planar portion (223) with a screw (26).

  The light emitter (17) attached to the substrate (18) is connected to the substrate (16) of the power generation unit (2) via the lead wire (24).

FIG. 10 is an electric circuit diagram of a road light-emitting sign according to the present invention.
In the present invention, an electric circuit that electrically connects the piezoelectric body (6) and the light emitting body (17) is provided with a capacitor (25) that stores electric power generated in the piezoelectric body (6). Although the electric power generated from the piezoelectric body (6) is small due to the individual impact of the member (10), the electric power generated in the piezoelectric body (6) is temporarily stored in the capacitor (25), and then discharged, so that the light emitting body (17 ), The light emitter (17) can be lit stably with high brightness.

FIG. 11 to FIG. 13 are diagrams showing another preferred embodiment of the road light-emitting sign according to the present invention.
The road light-emitting sign of this embodiment is different from that of the above-described embodiment in that a wiping tool (27) is attached to the front surface of the lighting unit (3) and the lighting unit (3) is in another part. It is the point which can be attached or detached from.

First, the first difference will be described.
The wiping tool (27) is attached to the surface of the transparent cover (20) constituting the lighting unit (3), and extends to the center axis (28) serving as the rotation center and to the side of the center axis (28). It is comprised from the several blade | wing (27) taken out and the wiping body (28) each attached to the back surface of these blade | wings (27).

The number of blades (27) is two in the illustrated example, but may be three or more.
The wiping body (28) is for wiping off the dirt on the surface of the transparent cover (20) as the blades (27) rotate, and may be a brush composed of a large number of hairs, rubber, etc. It may be an elastic material.

By providing such a wiping tool (27), when the blade (27) rotates in response to wind force, it adheres to the surface of the transparent cover (20) by the wiping body (28) attached to the back surface of the blade (27). The dirty dirt is wiped off.
Therefore, when dirt is attached to the transparent cover (20), the light of the illuminant (17) that reaches the outside and the light reflected by the surface of the reflector (19) are not weakened, and for a long period of time. It will be possible to attract the driver's attention strongly.

Next, the second difference will be described.
The unit body (22) has a small annular portion (221) on the front side and a large annular portion (222) on the rear side, as in the above-described embodiment. Of the portions (221) and (222), the front annular portion (221) is detachably fixed to the unit main body (22) by a screw (30).

  Inside the small annular part (221) is a lighting unit (3) comprising a substrate (18) provided with a light emitter (17), a reflector (19), a transparent cover (20), and a wiper (27). It is fixed by (23). Further, the rotating blade (1) is disposed inside the large annular portion (222) at the rear, and the power generation unit (2) to which the rotating blade (1) is attached is attached to the upper surface of the planar portion (223) with a screw ( 26).

  As described above, when the lighting unit (3) can be attached to and detached from the unit body (22) together with the annular portion (221), the lighting unit can be used when there is a restriction on the installation location on the road. (3) Only the lower part can be attached, and other parts (rotating blades, rotating bodies, weight members, other parts with a piezoelectric body) can be attached to the upper handrail, etc., and space-saving installation is possible It becomes.

Hereinafter, the operation of the road light-emitting sign according to the present invention will be described.
The road light-emitting sign according to the present invention is installed in a tunnel or on the side of a road, and the blade member (1) rotates when the amount of natural wind or wind generated by traffic of the vehicle exceeds a certain level (for example, 3 m / s or more). To do.
When the blade member (1) rotates, the central shaft (7) and the rotating disk (8) of the weight rotating unit (5) rotate, and the weight member is caused by the centrifugal force generated with the rotation of the rotating disk (8). (10) rotates around one end and intermittently strikes the piezoelectric body (6) below it.
Thereby, an electromotive force is generated in the piezoelectric body (6), and the light emitting body (17) is lit by the generated electromotive force, so that the driver can be alerted.

  As described above, in the road light emitting sign according to the present invention, an electromotive force is generated by hitting the piezoelectric body (16) by the weight member (10) that rotates as the rotating blade (1) rotates, and this electromotive force is generated. Since the light-emitting body (17) is turned on using the torque, the torque required for the rotation of the rotating blades can be reduced. Therefore, the installation space can be reduced by reducing the diameter of the rotating blades, and it is possible to generate power and emit light even in a place where the wind speed is low. Further, since there is almost no need for maintenance, maintenance management becomes very easy.

  Further, since the weight member (10) is rotated (opened outward) using centrifugal force, the weight member does not rotate unless the disk member (8) is rotated at a high speed more than a certain degree. (will not open). Therefore, the weight member (10) does not collide unnecessarily with the piezoelectric body (6), wear of the weight member can be prevented, and the need for maintenance can be reduced.

  The present invention is used as a road sign for alerting a driver by emitting light on a road or in a tunnel.

It is an external view which shows the whole structure of the road light emission sign which concerns on this invention. It is sectional drawing which shows the whole structure of the road light emission sign which concerns on this invention. It is a figure which shows a mode that a rotary blade is assembled | attached with respect to an electric power generation unit. It is an exploded view of a power generation unit. It is a perspective view of a weight rotation unit. It is an exploded view of a weight rotation unit. It is a figure which shows the state which the weight member rotates by the centrifugal force, and opens outward. It is a figure which shows typically the positional relationship of the rotating shaft of each weight member at the time of attaching two weight members (one set) with respect to three rotating disks. It is the figure which decomposed | disassembled and showed the lighting unit in the road light emission sign which concerns on this invention. It is an electric circuit diagram of the road light-emitting sign according to the present invention. It is an external view of the whole structure of another suitable embodiment of the road luminous sign which concerns on this invention. It is a figure which shows the state which removed the lighting unit of another suitable embodiment of the road light emission sign which concerns on this invention. It is the figure which decomposed | disassembled and showed the lighting unit of another suitable embodiment of the road light-emitting sign which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating blade 2 Power generation unit 3 Lighting unit 4 Main body case 5 Weight rotating unit 6 Piezoelectric body 7 Center axis of rotating body 8 Rotating disk 9 Rotating axis of weight member (axis serving as a rotation center)
10 Weight member 17 Light emitter 25 Capacitor

Claims (9)

Rotating blades that rotate by receiving wind force,
A rotating body connected to the rotating shaft of the rotating blade and rotating about the central axis;
A weight member pivoted around the one end portion by a centrifugal force generated by the rotation of the rotating body, with one end portion being pivotally mounted around the center axis of the rotating body;
A piezoelectric body that is struck at the other end by rotation of the weight member to generate an electromotive force;
A road light-emitting sign comprising a light-emitting body that is turned on by an electromotive force generated in the piezoelectric body.   The road light-emitting sign according to claim 1, wherein a plurality of the weight members are attached at equal angular intervals around the central axis of the rotating body.   A plurality of sets of weight members are attached at intervals in the axial direction of the central axis of the rotating body, and the piezoelectric bodies are arranged at positions corresponding to respective sets of the plurality of weight members. The road light-emitting sign according to claim 2, wherein The rotating body includes a central axis connected to one end of the rotary shaft of the rotary blade, and a plurality of rotary disks having a through hole through which the central axis is inserted and arranged in parallel to each other. And
4. The road light-emitting sign according to claim 3, wherein the weight members are pivotally attached to the surface of each rotating disk so as to be rotatable one by one.   As for the axis which becomes the rotation center of the weight member pivotally attached to each of the plurality of rotating disks, the position when viewed in the direction of the central axis is the rotation center of the other weight member. The road light-emitting sign according to claim 4, wherein the road light-emitting sign is attached at a position that does not overlap the shaft.   6. The road light emitting sign according to claim 1, wherein only one end of the piezoelectric body is fixed, and the vicinity of the other end, which is a free end, is hit by the weight member.   The road light emission according to any one of claims 1 to 6, wherein a capacitor for accumulating electric power generated in the piezoelectric body is provided in an electric circuit that electrically connects the piezoelectric body and the light emitting body. Signs.   The road light-emitting sign according to claim 1, wherein the light emitter is a light-emitting diode.   The lighting unit including the light emitter is configured to be detachable with respect to the rotating blade, the rotating body, the weight member, and other parts including the piezoelectric body. The road luminous sign as described in.

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