KR102442010B1 - Crosswalk safety device with projector - Google Patents

Abstract

The present invention relates to a crosswalk safety device which includes a projector and a safety assist device for projecting traffic light and crosswalk patterns onto a road surface. The projector can be easily maintained even in hot or cold weather and configured to adjust a size of a projection surface, and the projector improves the crosswalk safety by detecting pedestrians and vehicles approaching the crosswalk and providing appropriate guidance or warning to the pedestrians and drivers.

Description

Crosswalk safety device with projector

The present invention is equipped with a projector and a safety assist device that projects the crosswalk pattern on the roadway surface so that the driver or pedestrian can reliably recognize the crosswalk even in bad weather or when visibility is limited, such as at night, thereby preventing accidents at crosswalks It relates to a crosswalk safety device having a projector that does.

Crosswalks are installed in various places on the roads in Korea. On wide roads with more than four lanes, not only white stripes indicating crosswalks, but also pedestrian traffic lights, driver traffic lights, and braille blocks to inform the visually impaired that it is a crosswalk are included. It is common to install only the white stripes that mark the crosswalk on the surface of the roadway on narrow roads with two lanes or less.

However, when the pattern of the crosswalk is discolored and blurred over time and visibility is limited in bad weather or at night, the driver does not clearly recognize the crosswalk, thereby increasing the risk of an accident.

In order to improve this, Republic of Korea Patent Publication No. 10-1165769 (published on July 16, 2012) 'Image Projection Device and Image Projection System' includes a case 100, a lamp housing 200, a transparent cap 300, and a slit. A technique for projecting and displaying a stripe pattern of a crosswalk on a road surface using an image projection device 10 composed of a part 400 and a lens part 500 is disclosed, and Korean Patent Application Laid-Open No. 10-2016- No. 0112521 (released on September 28, 2016) 'Traffic safety system using switchable road sign output device' includes a traffic light control device 100 and road sign output devices 200 and 300 interlocked therewith, The road sign output device 200, 300 is composed of internal light sources 211, 311, image panels 213, 313, and a lens 212, and in the case of a pedestrian crossing signal, a crosswalk image 213F, etc., is displayed on the road surface. Projecting configurations are disclosed, but these are simply to project and display the stripe pattern of the crosswalk on the road surface, so it is not possible to expect a remarkable effect to improve the safety of the crosswalk, but also the luminous flux emitted from the lamp (or light source) It is expected that the configuration for collecting light and the configuration for installing and operating the projector in a harsh outdoor environment are insufficient, resulting in low luminous efficiency and difficult installation and maintenance.

Republic of Korea Patent Publication No. 10-1165769 Republic of Korea Patent Publication No. 10-2016-0112521

The present invention is to solve the above problems, improve the projector for projecting a crosswalk pattern on the road surface, improve the light efficiency, and make it easy to install and maintain the projector even under the harsh natural environment outdoors At the same time, it aims to provide a 'crosswalk safety device equipped with a projection device', which is equipped with an additional safety aid device to improve the safety of the crosswalk.

Crosswalk safety device having a projector of the present invention for solving the above problems has the following features.

Crosswalk safety device having a projector according to the present invention,

A crosswalk safety device having a crosswalk part 3 and a traffic light 10 installed, and a projection part 20 for projecting a crosswalk pattern on the crosswalk part 3, wherein the projection part 20 is the crosswalk Projector body for projecting a crosswalk pattern on the sidewalk (3); Projector support/adjustment member for adjusting the size of the crosswalk pattern projected on the crosswalk part (3) by a control signal through the remote control; and a projector box in which the projector body and the projector supporting/adjusting member are accommodated, wherein the projector body includes a light source 211 composed of an LED element, a reflector 212 composed of a parabolic mirror to reflect the light of the light source, the A heat dissipation member 213 coupled to the rear surface of the reflector 212 to emit heat generated from the light source, a cylindrical barrel 214 having one end coupled to an opening side of the reflecting mirror 212, and the barrel 214 A projection lens 215 installed at the other end, a transparent protective cap 216 that seals and protects an end of the projection lens 215 side of the barrel 214, and an insertion groove formed in the longitudinal center of the barrel 214 It is inserted into and characterized in that it consists of a transparent image plate 217 on which an image of a crosswalk pattern is formed.

And the projector support/adjustment member supports the projector body and adjusts the size of the crosswalk pattern projected on the roadway 1 surface by adjusting the distance between the projection lens 215 and the surface of the roadway 1 A transfer screw 221 installed in parallel to one side of the barrel 214, a motor 222 rotating the transfer screw 221, and a transfer moving according to the rotation of the transfer screw 221 A nut 223, a connecting member 224 having both ends coupled to the surface of the transfer nut 223 and the barrel 214, a guide post 225 installed in parallel to the other side of the barrel 214, and the guide One end is inserted into the guide groove formed along the longitudinal direction of the pillar 225, and the other end is coupled to the surface of the barrel 214 to guide the transport of the barrel 214. characterized.

In addition, the projector box is a rectangular parallelepiped box in which the projector body and the projector support/control member are accommodated, and the bottom plate 231 formed of a rectangular plate and the bottom plate 231 are opened from above so that the bottom plate 231 can be covered from above. Consists of a mold cover 232, a heat insulating material is attached to the inner surface of the projector box, the bottom plate 231 is a transparent window 233 through which the light projected from the projection lens 215 passes, outside air An intake port 234 formed to be sucked into the projector box, an intake fan 235 installed inside the intake port 234, an exhaust port 236 formed to discharge the air inside the projector box to the outside, and the exhaust port 236 includes an exhaust fan 237 installed inside the 238), and a diaphragm 239 guiding external air sucked through the intake port 234 to circulate through the control unit 50 and the heat dissipation member 213 is disposed inside the projector box do.

On the other hand, it is installed on both sidewalks 2 adjacent to both ends of the crosswalk part 3, is displaced by the weight of a pedestrian approaching the crosswalk part 3, and detects a pedestrian by pressing a switch ( 30); and a light emitting unit 34 and a light receiving unit 35 for detecting a pedestrian entering the crosswalk 3 from the pedestrian detecting unit 30 .

And when the pedestrian is detected by the pedestrian detection unit 30, and transmits a guide to the pedestrian, further comprising a guide unit 40 to light the sign 41, the guide unit 40 is a sign 41, the vehicle It is characterized in that it is composed of a detection sensor (42) and a speaker (43).

In addition, it further includes a control unit 50 for controlling the projection unit 20, the pedestrian detection unit 30 and the guide unit 40, the control unit 50 measures the illuminance outside the projector box and displays the result An illuminance sensor 51 that transmits to the control unit 50, a temperature sensor 52 that measures the temperature inside the projector box and transmits the result to the control unit 50, and between the control unit 50 and each component It is characterized in that it is configured to include a communication unit 53 that mediates the communication of.

Crosswalk safety device with a projector according to the present invention improves the light efficiency of the projector by focusing the light of the projector installed in the crosswalk in a predetermined direction, shielding the heat conduction between the inside and outside of the projector box, and having a cooling fan And it is easy to maintain the projector even in the cold season, and by allowing the size of the projection surface to be easily adjusted with the remote control, the effect of easy installation of the projector is expected.

In addition, the effect of improving the safety of the crosswalk is expected by making it clear to pedestrians who want to use the crosswalk and providing appropriate guidance and warning to pedestrians and vehicle drivers.

1 is an exploded perspective view of an image projection apparatus according to the prior art.
Figure 2 is a schematic diagram of a traffic safety system using a road sign output device according to the prior art.
Figure 3 is an overall perspective view of a crosswalk equipped with a crosswalk safety device having a projector according to the present invention.
4 is a cross-sectional view showing the inside of the projector box according to the present invention.
5 is a view showing a pedestrian detection unit of the present invention, (A) is an external perspective view, (B) is a cross-sectional view, (C) is a plan view with the cover removed.
6 is a perspective view showing a guide of the present invention.
7 is a block diagram illustrating a control unit of the present invention and its control relationship.

Hereinafter, a crosswalk safety device having a projector according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

Hereinafter, descriptions of previously known matters will be omitted or simplified in order to clarify the gist of the present invention.

As shown in FIG. 3, the crosswalk safety device with the projector of the present invention is a normal crosswalk part painted to be connected from one sidewalk 2 to the other sidewalk 2 across the roadway (1). 3) and a device for preventing a safety accident at a crosswalk by being installed in a crosswalk equipped with a traffic light 10 and a projection unit 20 for projecting a crosswalk pattern on the crosswalk portion 3; a pedestrian detection unit 30 installed on both sidewalks 2 adjacent to both ends of the crosswalk part 3, and detecting a pedestrian approaching the crosswalk part 3; When a pedestrian is detected by the pedestrian detection unit 30, a guide unit 40 for sending a guide message to the pedestrian and lighting the sign 41; It is configured to include a control unit 50 for controlling the projection unit 20, the pedestrian detection unit 30 and the guide unit 40.

First, the projection unit 20 includes a projector body for projecting a crosswalk pattern on the crosswalk unit 3, and a projector support and adjustment member for adjusting the size of the crosswalk pattern projected on the crosswalk unit 3 and the It is composed of a projector body and a projector box in which the projector supporting/adjusting member is accommodated.

The projector body includes a light source 211 composed of an LED element, a reflector 212 composed of a parabolic mirror to reflect the light of the light source, and a heat dissipation member coupled to the rear surface of the reflector 212 to emit heat generated from the light source. (213), a cylindrical barrel 214 having one end coupled to the opening side of the reflector 212, a projection lens 215 installed at the other end of the barrel 214, and a projection lens of the barrel 214 ( 215) A transparent protective cap 216 that closes the end and a transparent image plate 217 that is inserted into the insertion groove formed in the longitudinal center of the barrel 214 and has an image of a crosswalk pattern. is composed of

And the projector support/adjustment member supports the projector body and adjusts the size of the crosswalk pattern projected on the roadway 1 surface by adjusting the distance between the projection lens 215 and the surface of the roadway 1 A transfer screw 221 installed in parallel to one side of the barrel 214, a motor 222 rotating the transfer screw 221, and a transfer moving according to the rotation of the transfer screw 221 A nut 223, a connecting member 224 having both ends coupled to the surface of the transfer nut 223 and the barrel 214, a guide post 225 installed in parallel to the other side of the barrel 214, and the guide One end is inserted into the guide groove formed along the longitudinal direction of the column 225 , and the other end is coupled to the surface of the barrel 214 and includes a guide member 226 , which guides the transport of the barrel 214 .

In addition, the projector box is a rectangular parallelepiped box in which the projector body and the like are accommodated, and the bottom plate 231 formed of a rectangular plate and the bottom plate 231 are opened from above so that the bottom plate can be covered from above. is composed of, a heat insulating material is attached to the inner surface of the projector box, the bottom plate 231 is a transparent window 233 through which the light projected from the projection lens 215 passes, and external air enters the projector box. An intake port 234 formed to be sucked in, an intake fan 235 installed inside the intake port 234, an exhaust port 236 formed to discharge the air inside the projector box to the outside, and the exhaust port 236 installed inside It includes an exhaust fan 237, and the lower end of the cover 232 protrudes below the bottom of the bottom plate 231 to prevent rainwater from penetrating into the projector box due to strong winds, etc. to form a rainwater barrier 238, , a diaphragm 239 guiding external air sucked through the intake port 234 to circulate through the control unit 50 and the heat dissipation member 213 is disposed inside the projector box. At this time, either one of the intake fan 235 and the exhaust fan 237 may be omitted in consideration of the cooling capacity in the projector box.

The pedestrian detection unit 30 is a component that detects when a pedestrian who intends to use a crosswalk approaches the crosswalk, and as shown in FIG. A base 31 installed on the road surface of the sidewalk, a plurality of load sensing blocks 32 arranged in a line along the longitudinal direction of the base 31 on the upper surface of the base 31, and the base 31 and the load sensing block It is composed of wirings (33) for load sensing circuits arranged in two rows between (32).

The base 31 is a rectangular thin plate having a narrow width and a long length, and is installed on the road surface of the sidewalk in connection with the crosswalk part 3 to serve as a pedestal for the load sensing blocks 32. As a member, a pedestrian There is no limitation on the material as long as the material has a degree of rigidity not to be damaged by the load applied by the .

In addition, the total length when the base 31 is installed on the sidewalk is set so that one load sensing block 32 is further installed on both sides of the crosswalk in the width direction, but two or more for convenience in manufacturing and construction It can be divided and manufactured, and the width is the same as the width of the load sensing block 32, and the base 31 can be installed in 3 to 5 rows in consideration of the width of the sidewalk and the number of waiting pedestrians.

The load sensing block 32 is composed of a square bottom plate and four side walls formed by bending upwards from the edge of the bottom plate, the housing 321 having an open upper surface; Four guide pins 322 vertically installed, one at each of the four corners of the bottom plate of the housing 321; four coil springs 323 inserted into the guide pins 322, one by one; In the center of the upper surface of the bottom plate of the housing 321, the bottom plate is arranged in a line in parallel to the bottom plate, the opposite ends are arranged to overlap each other, and one end of the housing 321 is formed by bending upwardly a switch part 324 having elasticity. two switch circuits 325; a cover 326 for accommodating the four sidewalls of the housing 321 from the outside, the lower side of which is made of a square upper plate and four sidewalls bent downwardly from the edge of the upper plate; a pressing portion 327 vertically protruding downward from the bottom surface of the upper plate of the cover 326; and an LED lamp 328 inserted into a depression formed on the upper surface of the upper plate of the cover 326 .

And the coil spring 323 inserted into the guide pin 322 is installed so that the lower end thereof is in contact with the bottom surface of the housing 321, and the upper end thereof is in contact with the upper plate of the cover 326, and four coil springs The standard value, which is the sum of the tensions, is adjusted within the range of 18 to 20 kg so that even elementary school students can detect it.

In addition, each of the switch circuits 325 has one end connected to the wiring 33 for the load sensing circuit so that all the load sensing blocks 32 are connected in parallel to only one of the plurality of load sensing blocks 32 . Even if a load is detected, it can detect the presence of a pedestrian.

In addition, when the cover 326 moves up and down by the coil spring 323 , the sidewall is guided by the sidewall of the housing 321 to move, so that the spring is not bent sideways.

On the other hand, when the pedestrian steps on the upper surface of the cover 326 of the load sensing block 32, the cover 326 moves to the lower side when the pressure due to the pedestrian's weight exceeds the predetermined reference value, and the cover ( The pressing part 327 formed on the bottom surface of the upper plate of 326 presses the switch part 324, and the switch circuit 325 is connected. Accordingly, the electric resistance of the wiring 33 for the load sensing circuit including the switch circuit 325 is changed, and the controller 60 detects the pedestrian by detecting the change in the electric resistance by an ohmmeter. Therefore, the pedestrian who stepped on the cover 326 can reliably recognize that he or she is located at the entrance of the crosswalk even if his/her sight and hearing are extremely limited because he/she is using a mobile device.

At this time, the moving length of the cover 326 is limited to the range of 0.5 cm to 1 cm so that the cover 326 sinks a lot to the lower side so that the pedestrian is not surprised or sinks too little so that the pedestrian does not recognize it, and the LED The lamp 328 is turned on or off according to the control of the controller 50 .

As described above, the coil spring 323 inserted into the guide pin 322 is a configuration for providing elasticity and restoring force to the cover 326, and can be replaced with other elastic materials.

In addition, the present invention further includes a light emitting unit 34 and a light receiving unit 35, the light emitting unit 34 is installed on one side of the traffic light pole 11 to emit infrared, and the light receiving unit 35 is It is installed in a position opposite to the light emitting part 34 of the auxiliary pole 36 installed parallel to the traffic light pole 11 or the fence 5 and receives infrared rays projected from the light emitting part from the load sensing block 32. Detects a pedestrian entering the crosswalk (3).

The guide unit 40 is a component that notifies the vehicle driver that it is a crosswalk so that a pedestrian who intends to use the crosswalk can safely cross the crosswalk, and guides cautions to the pedestrian, as shown in FIG. 6 , a sign 41 , the vehicle detection sensor 42 and the speaker 43 , the operation of which is controlled by the control unit 50 .

The sign 41 is a circular sign, and the phrase "stop once" is written on its surface, and an LED lamp is built-in therein so that the driver can easily recognize it at night, and the vehicle detection sensor 42 is The sign 41 is disposed at the upper end of the coupled post to detect whether there is a vehicle approaching within a predetermined range, and the speaker 43 is inserted into the post at the lower end of the sign 41 to send out information to pedestrians. do. Meanwhile, the vehicle detection sensor 42 may be installed in the projector box.

The control unit 50 is a component that controls the operation of each component constituting the present invention, and is accommodated in the projector box as shown in FIG. 7, measures the illuminance outside the projector box, and outputs the result to the control unit 50 An illuminance sensor 51 that transmits to the projector box, a temperature sensor 52 that measures the temperature inside the projector box and transmits the result to the control unit 50, and the control unit 50 mediating communication between each component It is configured to include a communication unit (53).

Power required for the operation of the crosswalk safety device of the present invention uses the power supplied to the traffic light.

The crosswalk safety device of the present invention configured as described above is installed as follows.

First, after installing the projector box, adjust the distance between the projection lens 215 and the surface of the roadway 1 on which the crosswalk pattern is projected so that the projected crosswalk pattern matches the area of the crosswalk part 3 , this is when the operator or manager sends a control signal using the remote control, the control unit 50 that receives the control signal through the communication unit 53 operates the motor 222 in the projector box, and accordingly the motor 222 ) is rotated, and the transfer nut 223 screwed to the transfer screw 221 is transferred, so that the barrel 214 coupled to the transfer nut 223 is moved, and further The distance between the projection lens 215 and the surface of the roadway 1 is changed, so that the projected area of the crosswalk pattern is changed. Therefore, the operator or manager can finish the installation of the crosswalk safety device of the present invention in a state in which the projected area of the crosswalk pattern is matched with the area of the crosswalk part 3 through the remote control.

Next, the crosswalk safety device of the present invention that is installed is operated as follows.

① The control unit 50 receives the illuminance around the crosswalk part 3 from the illuminance sensor 51 installed on the outer surface of the projector box, and when the illuminance is less than the set value, power is supplied to the light source 211 of the projection unit 20 It is supplied to project the crosswalk pattern on the crosswalk part (3). In addition, the control unit 50 receives the temperature inside the projector box from the temperature sensor 52 installed in the projector box, and when the temperature is above a set value, the intake port 234 and the exhaust port 236 are opened, and the intake fan ( 235 ) and the exhaust fan 237 are operated to cool the heat dissipation member 213 and the control unit 50 of the projection unit 20 .

② The control unit 50 always supplies power to the load sensing block 32 to detect a pedestrian, and the LED lamp 328 of the load sensing block 32 is illuminated when the illumination of the illumination sensor 51 is less than the set value. Power is supplied under the control of the control unit 50 only.

When a pedestrian is detected by the load detection block 32, the control unit 50 passes through the speaker 43 and transmits a notice to the effect of “Please wait.” In this case, the pedestrian is guided to enter the crosswalk 3 in connection with the operation signal of the traffic light 10, but the light emitting unit 34 and the light receiving unit 35 allow the pedestrian to enter the roadway 1 when the pedestrian stops signal. When the case of entering is detected, the speaker 43 guides the pedestrian to wait on the sidewalk (2).

On the other hand, if the traffic light 10 is operating as a flashing signal at night time, whether there is a vehicle approaching the crosswalk within a predetermined distance, for example, 30m to 50m by supplying power to the vehicle detection sensor 42 After checking, if the vehicle is present, it waits, and after the vehicle passes, power is supplied to the sign 41 that guides the vehicle to stop immediately and turns on, and a notice to the pedestrian saying “You may cross.” is transmitted through the speaker (43). At this time, when there is a vehicle approaching within a predetermined distance, waiting without supplying power to the sign 41 is to prevent the risk of sudden braking or an accident caused by sudden lighting on the vehicle driver by panicking.

If there is a vehicle approaching the crosswalk without decelerating within a predetermined distance, for example, 30m to 50m, while the pedestrian is passing the crosswalk part 3, the pedestrian is warned of danger through the speaker 43, In the approaching vehicle, an alarm sound is transmitted through a directional speaker included in the speaker 43 and installed toward the vehicle, and when the illuminance of the illuminance sensor 51 is less than the set value, the sign 41 is flashed, When the illuminance is higher than the set value, two yellow or red lights installed on the outside of the projector box to face the approaching vehicle alternately flash and alert.

③ If the control unit 50 does not detect a pedestrian by the load detection blocks 32 on both sides after one minute has elapsed since the lighting of the sign 41, the control unit 50 returns to the state of ① and repeats the steps ① to ③.

The present invention is not limited to the specific preferred embodiments described above, and without departing from the gist of the present invention as claimed in the claims, anyone with ordinary skill in the art to which the invention pertains can implement various modifications Of course, such modifications are intended to be within the scope of the claims.

1: Driveway, 2: Sidewalk, 3: Crosswalk, 4: Stop Line, 5: Fence, 6: Signal Control
10: traffic light, 11: traffic light pole, 12: traffic light stand, 13: vehicle traffic light, 14: pedestrian traffic light
20: projection unit, 211 light source, 212: reflector, 213: heat dissipation member, 214: barrel, 215: projection lens, 216: protective cap, 217: image plate
221: transfer screw, 222: motor, 223: transfer nut, 224: connecting member, 225: guide pillar, 226: guide member
231: bottom plate, 232: cover, 233: floodlight, 234: intake, 235: intake fan, 236: exhaust, 237: exhaust fan, 238: rain gutter, 239: diaphragm
30: pedestrian detection unit, 31: base, 32: load sensing block, 33: wiring for load sensing circuit, 34: light emitting unit, 35: light receiving unit, 36: auxiliary pillar
321: housing, 322: guide pin, 323: coil spring, 324: switch unit, 325: switch circuit, 326: cover, 327: press part, 328: LED lamp
40: guide, 41: sign, 42: vehicle detection sensor, 43: speaker
50: control unit, 51: illuminance sensor, 52: temperature sensor, 53: communication unit

Claims (6)

Crosswalk safety equipped with a crosswalk part 3 and a traffic light 10 installed, and a projection part 20 for projecting a crosswalk pattern on the crosswalk part 3 to prevent safety accidents of pedestrians In the device,
Pedestrian detection unit 30 that is installed on both sidewalks 2 adjacent to both ends of the crosswalk 3, is displaced by the weight of a pedestrian approaching the crosswalk 3, and detects a pedestrian by pressing a switch. ; and
Further comprising a light emitting unit 34 and a light receiving unit 35 for detecting a pedestrian entering the crosswalk 3 from the pedestrian detection unit 30,
The projection unit 20 includes a projector body for projecting a crosswalk pattern on the crosswalk unit (3); Projector support/adjustment member for adjusting the size of the crosswalk pattern projected on the crosswalk part (3) by a control signal through the remote control; and a projector box in which the projector body and the projector supporting/adjusting member are accommodated;
The pedestrian detection unit 30 is a base 31 installed on the road surfaces of both sidewalks by connecting one side to the crosswalk unit 3, and in a line along the longitudinal direction of the base 31 on the upper surface of the base 31 It consists of a plurality of load sensing blocks 32 arranged as A housing 321 with an open top surface made up of a square bottom plate and four side walls, four guide pins 322 installed vertically, one at each of the four corners of the bottom plate of the housing 321, and the guide pins 322 ), including four coil springs 323 inserted one by one in each, and a cover 326 for accommodating the four sidewalls of the housing 321 from the outside in the form of enveloping them, the pedestrian is located on the side of the crosswalk entrance Crosswalk safety device with a projector, characterized in that it can be reliably recognized. According to claim 1,
The projector body includes a light source 211 composed of an LED element, a reflector 212 composed of a parabolic mirror to reflect the light of the light source, and a heat dissipation member coupled to the rear surface of the reflector 212 to emit heat generated from the light source. (213), a cylindrical barrel 214 having one end coupled to the opening side of the reflector 212, a projection lens 215 installed at the other end of the barrel 214, and a projection lens of the barrel 214 ( 215) A transparent protective cap 216 that seals and protects the side end, and a transparent image plate that is inserted into the insertion groove formed in the longitudinal center of the barrel 214 and has an image of a crosswalk pattern ( 217), and
The projector support/adjustment member supports the projector body and adjusts the distance between the projection lens 215 and the surface of the roadway 1 to adjust the size of the crosswalk pattern projected on the roadway 1 surface. A transfer screw 221 installed side by side on one side of the barrel 214, a motor 222 rotating the transfer screw 221, and a transfer nut moving according to the rotation of the transfer screw 221 ( 223), a connecting member 224 in which both ends are coupled to the surface of the transfer nut 223 and the barrel 214, a guide post 225 installed in parallel to the other side of the barrel 214, and the guide post ( 225), one end is inserted into the guide groove formed along the longitudinal direction, and the other end is coupled to the surface of the barrel 214, characterized in that it is composed of a guide member 226 for guiding the transport of the barrel 214. A crosswalk safety device equipped with a projector. 3. The method of claim 2,
The projector box is a rectangular parallelepiped box in which the projector body and the projector supporting/adjusting member are accommodated, and the bottom plate 231 formed of a rectangular plate and the bottom plate 231 are covered from above. Consists of 232, and a thermal insulation material is attached to the inner surface of the projector box,
The bottom plate 231 is a transparent window 233 through which the light projected from the projection lens 215 passes, an intake port 234 formed so that external air is sucked into the projector box, and the intake port 234 on the inside. Including an intake fan 235 installed, an exhaust port 236 formed to discharge the air inside the projector box to the outside, and an exhaust fan 237 installed inside the exhaust port 236,
The lower end of the cover 232 protrudes downward from the bottom of the bottom plate 231 to prevent rainwater from penetrating into the projector box by strong winds to form a rainwater barrier 238,
A diaphragm 239 guiding external air sucked through the intake port 234 to circulate through the control unit 50 and the heat dissipation member 213 is disposed inside the projector box. Crosswalk safety devices. delete According to claim 1,
When a pedestrian is detected by the pedestrian detection unit 30, it transmits a notice to the pedestrian and further comprises a guide unit 40 for lighting the vehicle sign 41,
The guide unit 40 is a crosswalk safety device with a projector, characterized in that consisting of a sign 41, a vehicle detection sensor 42 and a speaker (43). 6. The method of claim 5,
Further comprising a control unit 50 for controlling the projection unit 20, the pedestrian detection unit 30 and the guide unit 40,
The control unit 50 measures the illuminance outside the projector box and transmits the result to the control unit 50, the illuminance sensor 51 measures the temperature inside the projector box and transmits the result to the control unit 50 Crosswalk safety device with a projector, characterized in that it comprises a temperature sensor (52) and a communication unit (53) mediating communication between the control unit (50) and each component.

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