JPH10184300A - Cleaner for tunnel luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hindrance to the passage of a car in a tunnel, to remove dirt sufficiently and to eliminate the need for trouble for cleaning. SOLUTION: The transparent cover 3 of the front of the tunnel luminaire 2 is coated with a material having photocatalytic action and displaying high hydrophilic properties according to photocatalytic action and having light transmitting properties to illumination light to be emitted. When a solenoid valve 10 is opened, the upper section of the transparent cover 3 is supplied with pressed water introduced by a main feed pipe 8 so as not to be sprung back substantially from the discharge port of a water discharge section 11 through a branch pipe 9. Water flowing down from the lower section of the transparent cover 3 is collected by a water collecting member 12 for discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning a tunnel lighting fixture for illuminating the inside of a tunnel.

[0002]

2. Description of the Related Art Dirt due to vehicle exhaust gas and the like easily adheres to a tunnel lighting device for illuminating the inside of a tunnel, and when the dirt becomes remarkable, the amount of illumination light decreases, and traffic safety can be secured. Will be gone. For this reason, the front part of the tunnel lighting fixture from which the illumination light is emitted is cleaned,
It is necessary to clean the front part.

[0003] Therefore, conventionally, an operator has used a cleaning liquid to clean the front surface of the tunnel lighting fixture with a brush or the like.

[0004]

However, cleaning with a brush or the like requires time and effort, and at the time of cleaning, it is necessary to regulate traffic in a tunnel, which is inconvenient for a driver of a vehicle.

[0005] Therefore, it is conceivable that high-pressure water is sprayed onto the front surface of the tunnel lighting fixture by a nozzle previously installed near the tunnel lighting fixture. In this case, automatic cleaning becomes possible, and no trouble is required for cleaning.

However, when the high-pressure water is sprayed on the front of the tunnel lighting device, the water rebounds greatly at the front and the splashes fall on the vehicle passing through the tunnel, which hinders the running of the vehicle. May be For this reason, it is necessary to regulate traffic in the tunnel at the time of cleaning, which inconveniences the driver of the vehicle.
In addition, since dirt adhering to the front part of the tunnel lighting fixture is mainly dirt containing oil based on the exhaust gas of the automobile, etc., spraying high-pressure water to the front part of the tunnel lighting fixture does not always sufficiently remove the dirt. Can not be dropped.

[0007] The present invention has been made in view of such circumstances, there is no risk of hindering the traffic of vehicles in the tunnel, it is possible to sufficiently remove the dirt, and no trouble is required for cleaning. It is an object of the present invention to provide a cleaning device for a tunnel lighting fixture.

[0008]

According to a first aspect of the present invention, there is provided a cleaning device for a tunnel lighting fixture having a photocatalytic action on a front surface from which illumination light is emitted to the outside. A cleaning device for cleaning the front surface of at least one tunnel lighting device coated with a material having high hydrophilicity according to a photocatalytic action and having a light-transmitting property with respect to illumination light to be emitted, Water on the front part of the at least one tunnel lighting fixture,
Water supply means for supplying water is provided so that the water does not substantially bounce.

As a result of recent research and development, there has been provided a material having a photocatalytic action and exhibiting a high hydrophilicity in accordance with the photocatalytic action and having a property of transmitting visible light and the like. As this type of material, for example, there is a coating agent in which a titanium oxide photocatalyst is combined with an appropriate composition (for example, silicone resin). The thin film surface of this material has a contact angle with water of several tens degrees or more at first. However, when exposed to ultraviolet light, the contact angle decreases and finally reaches almost 0 degrees, indicating extremely high hydrophilicity. After that, the contact angle is about several degrees without exposure to ultraviolet light for several tens of hours. Is maintained, and even if the hydrophilicity is reduced, re-irradiation with ultraviolet light restores the extremely high hydrophilicity. And since the thin film surface of this kind of material shows high hydrophilicity, water is easier to adjust to the surface than oil stain, so it is easy to remove the attached oil stain just by flowing water on the surface. Yes, it shows purification action by water. Examples of this type of material include, for example, the homepage of Tohoku Kikai Co., Ltd. at the Internet address “http://www.sphere.ad.jp” and the Nikkei Mechanical published by Nikkei BP on September 2, 1996. No. 488, page 14-
Page 15 and the Japan Ceramics Association
"CERAMICS J, published on October 1, 2010
APAN, Vol. 31, No. 10, pages 837 to 840.

In the first aspect, a material exhibiting such a water-purifying action is coated on the front face of the tunnel lighting fixture, and water is supplied to the front face of the tunnel lighting fixture by water supply means. . Therefore, the supplied water flows down the front part of the tunnel lighting fixture, and at this time, dirt attached to the front part is removed, and the front part is purified. And since the purifying action of the above-mentioned material by water is used, the water to be supplied is not sprayed at a high pressure as in the prior art, but is merely supplied so that it does not substantially bounce off. The dirt can be sufficiently removed without using it. As described above, according to the first aspect, since the water is merely supplied so as not to substantially bounce, there is no risk of hindering the traffic of the vehicle in the tunnel. It is no longer necessary to regulate the passage of traffic and cleaning is not troublesome. The dirt adhering to the front part is mainly dirt containing oil based on the exhaust gas of the automobile. Further, the light emitted from the tunnel lighting fixture usually contains ultraviolet rays, and the ultraviolet rays irradiate the material.

According to a second aspect of the present invention, there is provided a cleaning device for a tunnel lighting device according to the first aspect, wherein the at least one tunnel lighting device comprises a plurality of one or more tunnel lighting devices. The water supply means is a main water supply pipe for guiding pressurized water, a plurality of branch pipes provided respectively corresponding to the plurality of groups, and branched from the main water supply pipe, A plurality of valves respectively provided in the middle of the plurality of branch pipes,
A water discharge unit that is provided at the tip side of the plurality of branch pipes and discharges water to the tunnel lighting fixtures belonging to each group,
It has. The second embodiment is an example of a water supply unit, but the water supply unit in the first embodiment is not limited to such a water supply unit.

According to a third aspect of the present invention, there is provided a cleaning device for a tunnel lighting fixture according to the first or second aspect, wherein the cleaning device is disposed near a lower portion of the front surface of the at least one tunnel lighting fixture. And water collecting means for drainage for collecting water flowing down from the lower part of the front part.

In the first and second embodiments, the water supplied as described above flows down from the lower part of the front part of the tunnel lighting fixture. Even if this is left, the situation in which water falls on the vehicle is far reduced as compared with the conventional case of injecting high-pressure water, and there is almost no hindrance to the traffic of the vehicle. However, it is preferable to provide a water collecting means for drainage as in the third aspect, since it is possible to more completely prevent a situation in which water falls on the vehicle.

According to a fourth aspect of the present invention, there is provided a cleaning device for a tunnel lighting device according to any one of the first to third aspects, wherein each of the at least one tunnel lighting device includes at least one tunnel lighting device. It is divided into a plurality of groups of tunnel lighting fixtures, and includes control means for controlling the water supply means so that the water supply periods for each of the plurality of groups do not overlap each other.

The water supply means is, as in the second aspect, usually a main water supply pipe for guiding pressurized water, and a branch pipe provided for each tunnel lighting fixture and branched from the main water supply pipe. However, if the length of the tunnel is long, the number of tunnel lighting fixtures also increases, so if water supply to all tunnel lighting fixtures is performed simultaneously, a branch pipe branched from the root side of the main water supply pipe will be used. The difference between the pressure of the supplied water and the pressure of the water supplied through the branch pipe branched from the tip side of the main water supply pipe increases. For this reason, it becomes difficult to supply water appropriately to all tunnel lighting fixtures. In this regard, according to the fourth aspect, the water supply periods for each of the plurality of groups do not overlap each other,
Even if the number of tunnel lighting fixtures installed is long and the number of tunnel lighting fixtures is large, the number of tunnel lighting fixtures supplied at the same time is reduced, and the difference in pressure of water supplied to the front of each tunnel lighting fixture is reduced. be able to. Therefore, according to the fourth aspect, even when the tunnel is long and the number of installed tunnel lighting fixtures is large, it is possible to appropriately supply water to all tunnel lighting fixtures.

According to a fifth aspect of the present invention, there is provided a cleaning device for a tunnel lighting fixture according to any one of the first to third aspects, wherein the water supply means is provided for each of the at least one tunnel lighting fixture. Control means for controlling the water supply means so as to periodically start water supply.

Since the degree of adhesion of dirt to the tunnel lighting equipment substantially depends on the elapsed time, if the water supply is started periodically as in the fifth aspect, the front surface of the tunnel lighting equipment is significantly stained. It can be automatically cleaned before and is preferred.

A cleaning device for a tunnel lighting device according to a sixth aspect of the present invention is the cleaning device according to any one of the first to third aspects, wherein at least one of the at least one tunnel lighting device is a tunnel lighting device. A dirt detecting means for directly or indirectly detecting a dirt state of the front surface of the appliance, and controlling the water supply means such that the water supply means starts water supply based on a detection signal from the dirt detection means. And control means.

According to the sixth aspect, it is preferable that the front surface of the tunnel lighting device can be automatically cleaned in accordance with the state of dirt.

[0020] A cleaning device for a tunnel lighting fixture according to a seventh aspect of the present invention is the cleaning device according to the sixth aspect, wherein the control means is configured to control the contamination when the water supply means does not start water supply for a predetermined period. The water supply unit is controlled so that the water supply unit starts water supply regardless of the detection signal from the detection unit.

According to the seventh aspect, even if the dirt detecting means does not operate normally, the cleaning is performed at least every predetermined period, which is preferable.

According to an eighth aspect of the present invention, there is provided the cleaning device for a tunnel lighting device according to the sixth or seventh aspect, wherein the dirt detecting means is a part of the illumination light emitted from the front portion. A light-receiving material, which has a photocatalytic action on the front surface where a part of the illumination light is incident and has a high hydrophilic property according to the photocatalysis, and which is transparent to the illumination light to be incident. And a supplementary water supply means for supplying water to the front surface of the light receiver.

In the sixth and seventh aspects, when a light receiving device that receives a part of the illumination light emitted from the front surface of the tunnel lighting device is used as the dirt detecting means, a normal light receiving device is used as it is. If this happens, dirt due to exhaust gas or the like also adheres to the front surface of the light receiver, and if left untouched, the state of dirt on the front surface of the tunnel lighting fixture cannot be accurately detected. In this regard, according to the eighth aspect, the front surface of the light receiver is coated with a predetermined material similarly to the front surface of the tunnel lighting fixture, and is supplied with water by the auxiliary water supply means. For this reason, even if the front part of the light receiver is once dirty, it is cleaned, so that the dirt condition of the front part of the tunnel lighting fixture can be accurately detected, and accordingly, the cleaning of the front part of the tunnel lighting fixture can be performed at an appropriate timing. Can be done with The water supply to the front part of the light receiver by the auxiliary water supply means may be performed simultaneously with the water supply to the front part of the tunnel lighting device by the water supply means, or may be performed at a different timing.

According to a ninth aspect of the present invention, there is provided a cleaning device for a tunnel lighting fixture according to any one of the fifth to eighth aspects, wherein each of the plurality of tunnel lighting fixtures includes at least one tunnel. The control means controls the water supply means so that the water supply periods for each of the plurality of groups do not overlap with each other.

According to the ninth aspect, similarly to the fourth aspect, even when the tunnel is long and the number of tunnel lighting fixtures installed is large, all tunnel lighting fixtures are used. To provide appropriate water supply.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cleaning apparatus for a tunnel lighting fixture according to an embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

FIG. 1 is a front view showing a cleaning device for a tunnel lighting fixture 1 according to the present embodiment. 2A is a view taken along the line AA in FIG. 1, and FIG. 2B is a view taken along the line B-A in FIG.
FIG. FIG. 3 is a diagram showing an installation state of the cleaning device of the tunnel lighting fixture 1 according to the present embodiment in a tunnel, and corresponds to FIG. FIG. 4A is a block diagram illustrating a cleaning device for the tunnel lighting fixture 1 according to the present embodiment, and FIG. 4B is a flowchart illustrating an example of the operation of the control unit 14.

In this embodiment, the tunnel lighting fixture 1
Has a main body 2, a lamp (not shown) housed in the main body 2, and a transparent cover 3 made of a transparent member disposed on the front of the main body 2. Illumination light emitted from the lamp is Is emitted to the outside via the transparent cover 3. The upper part of the transparent cover 3 is hingedly connected to the main body 2 by the metal fitting 4, and the transparent cover 3 can be opened and closed so that the lamp can be easily replaced. 1 and 2, reference numeral 5 denotes a metal fitting for detachably fixing the lower portion of the transparent cover 3 to the main body 2. The main body 2 is fixed to a wall surface 7 of a tunnel via a support member 6. In the present embodiment, the front surface of the transparent cover 3 is a vertical surface.

Although not shown in the drawings, the front surface of the tunnel lighting fixture 1 (in the present embodiment, the front surface of the transparent cover 3 (left surface in FIG. 2)) has a photocatalytic action and A material that exhibits high hydrophilicity according to the action and has a light-transmitting property with respect to the illumination light to be emitted is coated. As this material, for example, those disclosed in the above-mentioned documents can be used.

Although FIGS. 1 and 2 (a) show only a portion related to one tunnel lighting fixture 1, in practice, as shown in FIG. It is provided in. However, in the present invention,
The number of the tunnel lighting fixtures 1 installed in the tunnel may be one or more.

As shown in FIGS. 1 and 2, a main water supply pipe 8 for guiding pressurized water is laid so as to extend horizontally along the wall surface 7 above the tunnel lighting fixture 1. I have. At a position corresponding to each tunnel lighting fixture 1, a branch pipe 9 is branched from the main water supply pipe 8, respectively. An electromagnetic valve 10 is provided in the middle of each branch pipe 9. However, a valve such as another control valve or a manual valve may be used instead of the electromagnetic valve 10. In addition, each branch pipe 9
Each of the water discharge units 11 is provided at the tip of the. In the present embodiment, the water discharge section 11 is formed of a pipe member having both ends closed, and is arranged so as to extend horizontally along the upper portion of the transparent cover 3 at a position closer to the upper front of the upper portion of the transparent cover 3. Have been. And in the water discharge part 11,
As shown in FIG. 2 (b), a large number of water outlets 11a are formed in the upper part of the transparent cover 3 for water discharge at intervals in the horizontal direction. In the present embodiment, when the solenoid valve 10 is opened, the pressurized water guided by the main water supply pipe 8 is turned off by the branch pipe 9.
The water is supplied from the water outlet 11a of the water outlet 11 to the upper portion of the transparent cover 3 at a pressure that does not substantially bounce. In the present embodiment, the branch pipe 9
Are provided in one-to-one correspondence with the tunnel lighting fixtures 1. However, when a plurality of tunnel lighting fixtures 1 are arranged in close proximity, the branch pipe 9 is connected to the plurality of tunnel lighting fixtures 1. And the water discharge section 11 provided at the tip end side of the branch pipe 9 may be configured to discharge water to the plurality of tunnel lighting fixtures 1.

As can be understood from the above description, the main water supply pipe 8, the branch pipe 9, the solenoid valve 10, and the water discharge section 11 provided corresponding to each tunnel lighting fixture 1 are provided at the front part of each tunnel lighting fixture 1. A water supply means for supplying water to the (transparent cover 3) such that the water does not substantially bounce off is provided, and the cleaning device according to the present embodiment has the water supply means. However, in the present invention, the configuration of the water supply means is not limited to such a configuration.

Further, the cleaning device according to the present embodiment has a drainage collecting means, such as a rain gutter, near the lower part of each tunnel lighting fixture 1 as a drainage means for collecting water flowing down from the lower part of the transparent cover 3. The water collecting member 12 is provided. However,
Unlike the rain gutter, the water collecting member 12 has a front portion raised as shown in FIG. 2 (a) so as to be able to collect water that has slightly bounced forward. The water collecting member 12 is provided by a support member (not shown).

Further, the cleaning device according to the present embodiment
As shown in FIG. 2, a light receiver 13 is provided as a dirt detection unit that detects a dirt state of the transparent cover 3 of a predetermined one of the plurality of tunnel luminaires 1. The light receiver 13 is provided in the tunnel lighting device 1.
As shown in FIGS. 1 and 2A, the water discharge section 11 receives a part of the illumination light emitted from the transparent cover 3 of FIG.
Is provided by a support member (not shown) in the vicinity of. Although not shown in the drawings, the front surface (incident window) 13a of the light receiving unit 13 into which a part of the illumination light is incident is made of a material having a photocatalytic action and exhibiting high hydrophilicity according to the photocatalytic action, A material having a property of transmitting the illumination light to be incident is coated. As this material, for example, those disclosed in the above-mentioned documents can be used. In the present embodiment, a water outlet (not shown) is also provided at a position corresponding to the front surface portion 13a of the light receiver 13 in the water discharge section 11. Therefore, the solenoid valve 1
When 0 is opened, the pressurized water guided by the main water supply pipe 8 passes through the branch pipe 9 from the water discharge port of the water discharge section 11 to the light receiver 1.
The water is also supplied to the front surface 13a of the third. That is, in the present embodiment, the water supply pipe 8 and the branch pipe 9, the solenoid valve 10, and the water discharge section 11 provided corresponding to the predetermined tunnel lighting fixture 1 supply water to the front face 13 a of the light receiver 13. It is also used as an auxiliary water supply means. However, such auxiliary water supply means is a tunnel lighting fixture 1
Can be provided independently of the water supply means for supplying water to the transparent cover 3.

Further, the cleaning device according to the present embodiment
As shown in FIG. 4A, based on a dirt detection signal from the photodetector 13 (a signal of a level corresponding to the amount of received light, a lower level indicates a higher degree of dirt). A control unit that controls the water supply means (specifically, in the present embodiment, a plurality of solenoid valves 10 provided corresponding to each tunnel lighting fixture 1) so that the water supply means starts water supply. 14. The control unit 14 can be configured using, for example, a microcomputer or the like.

An example of the operation of the control unit 14 will be described with reference to FIG. When starting the operation, the control unit 14 determines whether or not the level of the dirt detection signal from the light receiver 13 is equal to or lower than a predetermined level (Step S1). If the level is not equal to or lower than the predetermined level, step S1 is repeated until the level of the stain detection signal becomes equal to or lower than the predetermined level. If the level of the dirt detection signal is equal to or lower than the predetermined level, the control unit 14 performs a water supply process (step S2), and proceeds to step S2.
Return to 1.

Here, an example of the water supply process in step S2 will be described with reference to FIG. FIG. 5A is a flowchart illustrating an example of the water supply process in step S2. This example is an example in which the water supply periods for all the tunnel lighting fixtures 1 are performed simultaneously.

In the example shown in FIG. 5A, when the water supply process in step S2 starts, the control unit 14 first opens all the solenoid valves 10 (step S11). Thereby, water supply to the transparent cover 3 of all the tunnel lighting fixtures 1 installed in the tunnel is started. Next, the control unit 14
Starts timekeeping (step S12), and then determines whether or not a predetermined time T1 (water supply period) has elapsed after starting timekeeping in step S12 (step S13).
If the predetermined time T1 has not elapsed, step S13 is repeated, and the flow waits for the predetermined time T1 to elapse. If the predetermined time T1 has elapsed, the control unit 14 determines that all the solenoid valves 1
0 is closed (step S14). Thereby, the water supply to all the tunnel lighting fixtures 1 is stopped. Thus, the water supply process is completed, and the process returns to step S1 in FIG.

Next, another example of the water supply process in step S2 in FIG. 4B will be described with reference to FIG. FIG. 5B is a flowchart illustrating another example of the water supply process in step S2. In this example, all the tunnel lighting fixtures 1 are divided into a plurality of groups (thus,
This is an example in which all the solenoid valves 10 are divided into a plurality of groups) and the water supply periods for the respective groups are shifted so as not to overlap.

In the example shown in FIG. 5B, when the water supply process of step S2 starts, the control unit 14 first opens the solenoid valve 10 of the first group among a plurality of groups that have been divided in advance. (Step S21). Thereby, water supply to the transparent cover 3 of only the tunnel lighting fixture 1 corresponding to the first group of solenoid valves 10 is started. Next, the control unit 14 starts timing (step S22),
It is determined whether or not a predetermined time T1 (water supply period) has elapsed since the start of time measurement in step S22 (step S2).
3). If the predetermined time T1 has not elapsed, step S
13 is repeated until a predetermined time T1 has elapsed. If the predetermined time T1 has elapsed, the control unit 14 closes the solenoid valves 10 of the group (step S24). Thereby, the water supply to the tunnel lighting fixture 1 corresponding to the solenoid valve 10 of the group is stopped. Then, the control unit 1
4 determines whether there is a next group of solenoid valves 10 (ie, whether there is a group of solenoid valves 10 that have not been opened since the start of the water supply process) (step S25). . If there is a next group, control unit 1
4 opens the solenoid valves 10 of the group (step S2).
1) Return to step S22. On the other hand, if it is determined in step S25 that there is no next group, the water supply process is completed, and the process returns to step S1 in FIG.

In the example shown in FIG. 5A, the water supply period for all the tunnel lighting fixtures 1 is performed at the same time. Therefore, when the tunnel is long and the number of the tunnel lighting fixtures 1 is large, the main water supply pipe 8 is not used. The difference between the pressure of the water supplied through the branch pipe 9 branched from the root side and the pressure of the water supplied through the branch pipe 9 branched from the tip side of the main water supply pipe 8 increases. For this reason, all tunnel lighting fixtures 1
It is difficult to provide appropriate water supply to In this regard, in the example shown in FIG. 5B, since the water supply periods for each of the plurality of groups do not overlap each other, water is supplied simultaneously even if the tunnel is long and the number of tunnel lighting fixtures 1 installed is large. The number of the tunnel lighting fixtures 1 can be reduced, and the difference in the pressure of the water supplied to the transparent cover 3 of each tunnel lighting fixture 1 can be reduced. Therefore, in the example shown in FIG. 5B, even when the tunnel is long and the number of the tunnel lighting fixtures 1 installed is large, appropriate water supply is performed to all the tunnel lighting fixtures 1. be able to.

According to the present embodiment, a material exhibiting a purifying action by water is coated on the transparent cover 3 of the tunnel lighting fixture 1, and water is supplied to the transparent cover 3 of the tunnel lighting fixture 1 by the water supply means. Water is supplied. Therefore, the supplied water flows down the transparent cover 3 of the tunnel lighting device 1, and at this time, dirt attached to the transparent cover 3 is removed, and the transparent cover 3 is purified.
And since the purifying action of the above-mentioned material by water is used, the water to be supplied is not sprayed at a high pressure as in the prior art, but is merely supplied so that it does not substantially bounce off. The dirt can be sufficiently removed without using it. As described above, according to the present embodiment, since water is merely supplied so as not to substantially bounce, there is no risk of hindering the traffic of vehicles in the tunnel, and the inside of the tunnel is not cleaned during cleaning. There is no need to regulate traffic,
No need for cleaning.

By the way, the supplied water flows down from the lower part of the transparent cover 3 of the tunnel lighting fixture 11.
Even if this is left, the situation in which water falls on the vehicle is far reduced as compared with the conventional case of injecting high-pressure water, and there is almost no hindrance to the traffic of the vehicle. However, it is preferable to provide the water collecting member 12 for drainage as in the present embodiment, since it is possible to more completely prevent a situation in which water falls on the vehicle.

Further, in the present embodiment, as described above, the water supply means is controlled so that the water supply means starts water supply based on the dirt detection signal from the light receiver 13 as the dirt detection means. Therefore, the transparent cover 3 of the tunnel lighting device 1 can be automatically cleaned according to the state of dirt, which is preferable. In the present embodiment, the light receiver 13 is provided only for one tunnel lighting device 1,
The light receiver 13 is provided for each of the plurality of tunnel lighting devices 1.
May be provided. For example, the light receivers 13 may be provided for all the tunnel lighting fixtures 1. in this case,
For example, the control unit 14 may cause only the tunnel lighting device corresponding to the light receiver 13 in which the level of the dirt detection signal is equal to or lower than the predetermined level to supply water. Further, in the present invention, the dirt detecting means is not limited to the light receiver 13, and for example, a pair of a light emitter and a light receiver installed in a tunnel is used irrespective of the tunnel lighting equipment 1. Can also. In this case, the dirt on the transparent cover 3 of the tunnel lighting fixture 1 is indirectly detected. In this case, the material is coated on each front surface of the light emitting device and the light receiving device in the same manner as in coating the material on the front surface portion 13a of the light receiving device 13 and supplying water to the front surface portion 13a. The water may be supplied to the transparent cover 3 of the tunnel lighting device 1 and the front surface thereof at the same time when water is supplied.

Further, the front portion 13a of the light receiver 13 is not coated with the material, and the front portion 13a is not coated.
If water is not supplied to a, the dirt due to the exhaust gas and the like also adheres to the front portion 13a, and if this is left as it is, the dirt state of the transparent cover 3 of the tunnel lighting fixture 1 cannot be accurately detected. . In this regard, according to the present embodiment, the front surface 13a of the light receiver 13 is coated with a predetermined material in the same manner as the transparent cover 3 of the tunnel lighting device 1, and supplied with water. For this reason, the front part 1 of the light receiver 13
Even if the 3a is soiled once, it is cleaned, so that the stained state of the transparent cover 3 of the tunnel lighting fixture 1 can be accurately detected, and therefore, the cleaning of the transparent cover 3 of the tunnel lighting fixture 1 is performed at an appropriate timing. Can be. In the present embodiment, water is supplied to the front portion 13a of the light receiver 13 at the same time as water is supplied to the transparent cover 3 of the tunnel lighting device 1 by the water supply means, but is configured to be performed at a different timing. You may.

In this embodiment, although it is possible to almost completely prevent a situation in which water falls on the vehicle, it is different from a normal state at the time of cleaning, so that the driver of the vehicle is notified in advance. Is preferred. For this reason,
For example, during the water supply process of step S2 in FIG.
It is preferable to display an indication such as "cleaning" at the entrance of the tunnel or inside the tunnel.

By the way, in the above-described embodiment,
The control unit 14 may be modified to perform the operation shown in FIG. 6A instead of performing the operation shown in FIG. 4B described above. FIG. 6A is a flowchart illustrating another example of the operation of the control unit 14.

In the example shown in FIG. 6A, the control unit 14
When the operation is started, timing is started (step S31),
Next, it is determined whether or not a predetermined time T2 (longest water supply start interval) has elapsed since the start of the time measurement in step S31 (step S32). If the predetermined time T2 has not elapsed, the control unit 14 determines whether the level of the dirt detection signal from the light receiver 13 is equal to or lower than the predetermined level (Step S3).
3). If not, the process returns to step S32. When it is determined in step S32 that the predetermined time T2 has elapsed, the control unit 14 performs the same water supply processing as step S2 in FIG. 4B (that is, the processing shown in FIG. 5A or the processing in FIG. 5B Is performed (step S3).
4) Then, the process returns to step S31. If it is determined in step S33 that the level is below the predetermined level,
After performing the water supply process in step S34, the control unit 14 returns to step S31.

In the example shown in FIG. 6A, the control unit 14
If the water supply means does not start water supply for the predetermined time T2, the water supply means is controlled so that the water supply means starts water supply regardless of the dirt detection signal from the detector 13. Therefore, even if the detector 13 does not operate normally, it is preferably cleaned at least every predetermined period T2.

In the above-described embodiment, the control unit 14 may be modified so as to perform the operation shown in FIG. 6B instead of the operation shown in FIG. 4B. . In this case, since the control unit 14 does not use the dirt detection signal from the detector 13, the detector 13 can be removed. FIG. 6B is a flowchart illustrating still another example of the operation of the control unit 14.

In the example shown in FIG. 6B, the control unit 14
When the operation is started, timing is started (step S41),
Next, it is determined whether or not a predetermined time T2 (water supply start interval) has elapsed since the start of the time measurement in step S41 (step S42). If the predetermined time T2 has not elapsed,
Step S42 is repeated until a predetermined time T2 has elapsed. If the predetermined time T2 has elapsed, the control unit 14
Performs the same water supply process as step S2 in FIG. 4 (b) (ie, the process shown in FIG. 5 (a) or the process shown in FIG. 5 (b)) (step S43), and thereafter, step S4
Return to 1.

In the example shown in FIG. 6B, the control unit 14
The water supply means is controlled so that the water supply means starts water supply periodically. Therefore, since the degree of adhesion of dirt to the tunnel lighting fixture 1 substantially depends on the elapsed time, the transparent cover 3 of the tunnel lighting fixture 1 can be automatically cleaned before the stain becomes significant.

The embodiment of the present invention and its modifications have been described above, but the present invention is not limited to these.

[0054]

As described above, according to the present invention,
It is possible to provide a cleaning device for a tunnel lighting fixture which can sufficiently remove dirt without hindering the traffic of vehicles in the tunnel and which does not require any trouble for cleaning.

[Brief description of the drawings]

FIG. 1 is a front view showing a cleaning device for a tunnel lighting fixture according to an embodiment of the present invention.

FIG. 2 is a diagram showing a cleaning device for a tunnel lighting fixture according to the embodiment, FIG. 2 (a) is a view taken along the line AA in FIG. 1, and FIG. 2 (b) is a view in FIG. FIG.

FIG. 3 is a diagram showing an installation state in a tunnel of a cleaning device for a tunnel lighting fixture according to the embodiment.

FIG. 4 is a diagram showing a cleaning device for a tunnel lighting fixture according to the embodiment, FIG. 4 (a) is a block diagram thereof, and FIG. 4 (b) is a flowchart showing an example of the operation of the control unit.

FIG. 5 is a flowchart showing two examples of a water supply process.

FIG. 6 is a flowchart showing another two examples of the operation of the control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel lighting fixture 2 Main body 3 Transparent cover (front part) 7 Tunnel wall surface 8 Main water supply pipe 9 Branch pipe 10 Solenoid valve 11 Water discharge part 12 Water collecting member 13 Light receiver 13a Front part 14 Control part

Claims (9)

[Claims] 1. A material having a photocatalytic action and exhibiting high hydrophilicity in accordance with the photocatalytic action and having a light-transmitting property with respect to the illuminating light to be emitted is provided on a front surface portion from which the illuminating light is emitted to the outside. A cleaning device for cleaning said front surface of at least one coated tunnel lighting device, wherein water is applied to said front portion of said at least one tunnel lighting device so that said water does not substantially bounce. A cleaning device for a tunnel lighting fixture, comprising a water supply means for supplying water. 2. The at least one tunnel lighting fixture is divided into a plurality of groups each comprising one or more tunnel lighting fixtures, wherein the water supply means comprises: a main water supply pipe for introducing pressurized water; A plurality of branch pipes provided corresponding to the plurality of groups, respectively; a plurality of branch pipes branched from the main water supply pipe; a plurality of valves respectively provided in the middle of the plurality of branch pipes; 2. A cleaning device for a tunnel lighting device according to claim 1, further comprising: a water discharge section provided to each of the plurality of the tunnel lighting devices and configured to discharge water to the tunnel lighting devices belonging to each group. 3. A drain collecting means disposed near a lower portion of the front portion of the at least one tunnel lighting device and configured to collect water flowing down from a lower portion of the front portion. The cleaning device for a tunnel lighting fixture according to claim 1 or 2. 4. The at least one tunnel lighting fixture is divided into a plurality of groups each including one or more tunnel lighting fixtures, and the water supply is performed so that water supply periods for each of the plurality of groups do not overlap with each other. 4. The apparatus for cleaning a tunnel lighting fixture according to claim 1, further comprising control means for controlling the means. 5. The apparatus according to claim 1, further comprising control means for controlling said water supply means such that said water supply means periodically starts supplying water to each of said at least one tunnel lighting fixture. 4. The cleaning device for a tunnel lighting device according to any one of claims 1 to 3. 6. A dirt detecting means for directly or indirectly detecting a dirt state of a front surface of at least one of the at least one tunnel lighting fixture, and a detection signal from the dirt detecting means. 4. The cleaning device for a tunnel lighting device according to claim 1, further comprising: a control unit configured to control the water supply unit so that the water supply unit starts water supply based on the control unit. 5. 7. The water supply means such that when the water supply means does not start water supply for a predetermined period, the water supply means starts water supply regardless of a detection signal from the dirt detection means. The cleaning device for a tunnel lighting fixture according to claim 6, wherein 8. The dirt detecting means is a light receiver for receiving a part of the illumination light emitted from the front part, and has a photocatalytic action on the front part on which the part of the illumination light is incident. A light-receiving device coated with a material exhibiting high hydrophilicity in accordance with the photocatalytic action and having a light-transmitting property with respect to incident illumination light, and an auxiliary water supply means for supplying water to the front surface of the light-receiving device The cleaning device for a tunnel lighting fixture according to claim 6, comprising: 9. The at least one tunnel lighting fixture is divided into a plurality of groups each including one or more tunnel lighting fixtures, and the control unit determines that water supply periods for each of the plurality of groups overlap each other. The cleaning device for a tunnel lighting device according to any one of claims 5 to 8, wherein the water supply means is controlled so as not to be inconsistent.