Light emitting device for suppressing the growth of liana

Abstract

To provide a technique capable of effectively suppressing climbing up of a liana to a structure.SOLUTION: A lighting device includes a housing fixed within a predetermined height range from a ground surface of a columnar or linear structure extending upward from the ground surface, and a plurality of light-emitting elements that are disposed in the housing and emit ultraviolet light, in which the plurality of light-emitting elements are arranged along a surface of the housing facing the ground surface, and irradiate a predetermined range of the ground surface including a root of the structure with ultraviolet light.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a light-emitting device for inhibiting the growth of climbing plants. [Background technology]

[0002] Patent Document 1 discloses a technology for irradiating ultraviolet rays to kill or inhibit the growth of weeds. In Patent Document 1, an ultraviolet irradiation device is attached to the outer surface of a pipeline that is installed away from the ground surface and parallel to it. Weeds on the ground surface are suppressed by irradiating ultraviolet rays from the ultraviolet irradiation device toward the ground surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-205962 Summary of the Invention [Problem to be solved by the invention]

[0004] In general, vines such as knotweed and kudzu have high reproductive potential because they reproduce from underground stems, and they grow quickly, wrapping around and tangling with objects as they grow. They can climb up supports, facility structures, and railroad and road sign poles and mounts, causing interference with the signs.

[0005] Therefore, climbing plants can have a negative impact on the scenery and safety in parks and along roads. Also, along roads, climbing plants can reduce the visibility of intersections and signs, obstructing traffic and compromising safety.

[0006] In addition, the areas where solar panels are installed are blessed with abundant sunlight, making it easy for vines to grow. As a result, the large leaves of vines that aim to absorb sunlight can cover the solar panels, which can significantly reduce power production.

[0007] Furthermore, if creeping plants invade buildings or structures, they can interfere with the daily maintenance of the buildings or structures.

[0008] The ultraviolet irradiation device disclosed in Patent Document 1 is primarily intended to control grasses, turfgrass, and the like, and does not anticipate creeping plants climbing up structures. Therefore, while it is possible to reduce the proliferation of grasses and the like from the ground by irradiating ultraviolet rays from the ultraviolet irradiation device of Patent Document 1 onto the ground, it is difficult to prevent creeping plants from climbing up structures such as pipelines from surrounding areas that are not irradiated with ultraviolet rays.

[0009] The present invention has been made in consideration of the above points, and aims to provide a technique that can effectively suppress climbing of vines onto structures. [Means for solving the problem]

[0010] In order to solve the above problems, one aspect of the present invention provides a light-emitting device for inhibiting the growth of climbing plants, which includes a housing fixed to a columnar or linear structure extending upward from the ground surface within a predetermined height range from the ground surface, and a plurality of light-emitting elements that emit ultraviolet light and are arranged within the housing. The plurality of light-emitting elements are arranged along the surface of the housing facing the ground surface, and irradiate a predetermined area of ​​the ground surface, including the base of the structure, with ultraviolet light.

[0011] The housing is, for example, disk-shaped with a through-hole in the center through which the structure passes. The light-emitting elements are arranged in a predetermined pattern centered on the through-hole. The light-emitting elements have an emission wavelength of 200 nm or more and 280 nm or less.

[0012] The surface of the housing facing the ground surface may be provided with windows at positions corresponding to the light emitting elements, allowing the passage of ultraviolet light emitted by the light emitting elements.

[0013] The window may be provided with a window member made of a material that transmits ultraviolet light.

[0014] The window member may have a lens function for controlling the light distribution so that the ultraviolet light generated from the plurality of light emitting elements is uniformly irradiated onto a predetermined area on the earth's surface.

[0015] A reflector may be provided around the light emitting element to reflect the ultraviolet light emitted by the light emitting element and pass it through the window.

[0016] A substrate may be disposed within the housing of the present invention, and a plurality of light-emitting elements may be mounted in an array on the substrate.

[0017] The light-emitting device for inhibiting the growth of vines of the present invention may further include an upper housing fixed to the structure above the housing, and a plurality of upper housing light-emitting elements that emit ultraviolet light and are arranged in the upper housing. The plurality of upper housing light-emitting elements are arranged along a surface of the upper housing facing the upper surface of the housing, and irradiate ultraviolet light toward an area including the upper surface of the housing.

[0018] The light distribution angle of the ultraviolet light emitted from the surface of the upper housing facing the top surface of the housing may be set to be smaller than the light distribution angle of the ultraviolet light emitted from the surface of the housing facing the ground surface.

[0019] The light emitting device for inhibiting the growth of vine plants of the present invention may further include a human presence sensor and a control unit that stops the irradiation of ultraviolet light when the human presence sensor detects a person.

[0020] Moreover, the area of ​​the main plane of the housing is, for example, 10 times or more the cross-sectional area of ​​the structure.

[0021] The light emitting device for inhibiting the growth of vines of the present invention may further include a timer, and the control unit starts or stops irradiation of ultraviolet light at the time set on the timer. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a light emitting device that can effectively prevent climbing vines from climbing up structures.

[0023] Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view of a light-emitting device for inhibiting the growth of climbing plants according to a first embodiment of the present invention; [Figure 2] (A) and (B) are a bottom view and a cross-sectional view of the housing of the light-emitting device for inhibiting the growth of climbing plants of embodiment 1, and (C) is a cross-sectional view of another structural example of the housing of the light-emitting device for inhibiting the growth of climbing plants of the embodiment. [Figure 3] 1 is a perspective view of a light-emitting device 1 for inhibiting the growth of climbing plants according to a second embodiment of the present invention; [Figure 4] FIG. 10 is a diagram for explaining the light distribution angle of the housing and the upper housing of the light emitting device 1 for inhibiting the growth of climbing plants according to the second embodiment. [Figure 5] FIG. 10 is a block diagram showing the configuration of a drive circuit of a light-emitting device for inhibiting the growth of climbing plants according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0026] <<Embodiment 1>> A light emitting device 1 for inhibiting the growth of climbing plants according to a first embodiment will be described.

[0027] Figure 1 shows the appearance of an embodiment of a light-emitting device 1 for inhibiting the growth of climbing plants fixed to a structure P, and Figures 2(A) and (B) are a bottom view and a cross-sectional view of the housing 10 of the light-emitting device 1 for inhibiting the growth of climbing plants.

[0028] As shown in Figures 1, 2(A) and 2(B), the light emitting device 1 for inhibiting the growth of climbing plants includes a housing 10 having a plurality of light emitting elements 111 arranged therein that emit ultraviolet light. The housing 10 is fixed to a columnar or linear structure P that extends upward from the ground surface within a predetermined height range from the ground surface. The plurality of light emitting elements 111 are arranged along a surface H of the housing 10 that faces the ground surface. The plurality of light emitting elements 111 irradiate ultraviolet light onto a predetermined range R on the ground surface, including a base P1 of the structure P (the portion where the structure P contacts the ground surface).

[0029] In this way, the light emitting device 1 for inhibiting the growth of climbing plants of this embodiment can kill or inhibit the growth of weeds growing on the ground by irradiating the entire predetermined range R of the ground surface, including the base P1 of the structure P, with ultraviolet light so that no unirradiated areas are left, and can also inhibit the growth of climbing plants that attempt to climb up from the structure P. Furthermore, by installing the housing 10 at a predetermined height above the structure P, it is possible to physically prevent climbing plants from wrapping around the structure P from the ground and climbing up.

[0030] The wavelength of the ultraviolet light emitted by the light emitting element 111 is UV-C, which is deep ultraviolet (DUV) and has a wavelength of 200 nm to 280 nm and is destructive to living organisms.

[0031] The structures P are, for example, street light poles, road sign poles, and the guy wires that support these poles. The vines are, for example, Cayenne, kudzu, ivy (Hedera), morning glory, wild grape, and the like.

[0032] The configuration of the housing 10 will now be described in detail.

[0033] The housing 10 is disk-shaped and has a through-hole 12 at the center through which the structure P passes. The plurality of light-emitting elements 111 are arranged in a predetermined pattern with the through-hole 12 at the center.

[0034] The housing 10 may have any structure as long as it can irradiate the aforementioned predetermined range R with deep ultraviolet light, and the shape is not limited to a disk shape and may be a flat rectangle. The main plane of the disk-shaped or flat rectangular housing 10 is preferably parallel to the surface H of the housing 10 that faces the ground. The shape of the top surface of the housing 10 is not limited and may be flat or curved.

[0035] The area of ​​face H of housing 10 is preferably 10 times or more the cross-sectional area of ​​structure P. Specifically, from the viewpoint of suppressing the climbing of common vines, housing 10 preferably has a diameter of 30 cm to 50 cm. Furthermore, the predetermined range R onto which ultraviolet light is irradiated preferably has a diameter of 1 m to 1 m 50 cm.

[0036] The housing 10 is fixed at a predetermined height on the structure P by members such as screws located in a portion of the periphery of the through-hole 12. The fixing method is not limited to fixing with screws, and the housing 10 may be fixed using a bracket or the like so that the outer side surface of the housing 10 contacts only a portion of the periphery of the structure. However, in a structure in which the housing 10 is placed only on a portion of the periphery of the structure using this bracket, the function of physically preventing climbing plants from climbing up is reduced compared to a structure in which the structure P is inserted into the through-hole 12 in the center of the housing 10.

[0037] In addition, here, as shown in FIG. 1, the housing 10 is fixed so that the main plane H of the housing 10 is perpendicular to the axial direction of the structure P, but the main plane H of the housing 10 may be inclined with respect to the axial direction of the structure P.

[0038] 2(B), a substrate 13 is disposed inside the housing 10 parallel to a surface H of the housing 10 facing the ground. The light-emitting elements 111 are mounted on the surface of the substrate 13 facing the surface H and arranged in a predetermined pattern.

[0039] On the surface H of the housing 10, windows 112 are provided at positions corresponding to the light emitting elements 111, respectively, for passing ultraviolet light emitted by the light emitting elements 111. The light emitting elements 111 and the windows 112 constitute the light emitting unit 11.

[0040] The window 112 may be an opening provided in the surface H of the housing 10, and may have a structure that allows deep ultraviolet light emitted from the light emitting elements 111 arranged inside the housing 10 to pass through. The window 112 may also be provided with a window member 113 made of a material that allows deep ultraviolet light to pass through. The window member 113 may be a flat plate-like member that transmits ultraviolet light, or may have a lens function that controls the light distribution so that the ultraviolet light generated from the multiple light emitting elements 111 is uniformly irradiated onto a predetermined area on the earth's surface.

[0041] Moreover, it is preferable that a reflector 114 be provided around the light emitting element 111 of the housing 10 to reflect the deep ultraviolet light emitted by the light emitting element 111 and pass it through the window 112 .

[0042] The height range for installing the housing 10 on the structure P is a range that has been determined in advance depending on the light emission intensity of the light emitting element 111, the density of the arrangement of the light emitting element 111, the spread angle of the ultraviolet light determined by the reflector 114 and the window member 113, etc., so that the illuminance of the deep ultraviolet light irradiated from the light emitting element 111 in the specified range R is strong enough to suppress the growth of climbing plants.

[0043] The housing 10 may be made of any material, such as resin or metal, but a metal material with high ultraviolet reflectivity, such as aluminum, is most preferable. Furthermore, metals with high thermal conductivity, such as die-cast aluminum or stainless steel, are preferred because they have excellent heat dissipation properties. As one example, the housing 10 can be manufactured by processing a metal plate. As another example, the housing 10 can be manufactured by carving out a portion corresponding to the light-emitting unit 11 from a resin or metal block. A heat sink (not shown) may be provided in the housing 10 to dissipate heat generated within the housing 10.

[0044] The shape of the reflector 114 is designed to reflect the deep ultraviolet light emitted by the light emitting element 111 and allow it to pass through the window 112. For example, the reflector 114 has a tapered shape whose diameter gradually narrows from the main plane H toward the inside of the housing 10, and is manufactured by processing a metal plate. The reflector 114 may also be manufactured by depositing a metal film on a material other than metal. The reflector 114 also has the function of preventing the ultraviolet light emitted by the light emitting element 111 from returning to the substrate 13. The reflector 114, together with the window member 113 and the light emitting element 111, constitutes the light emitting unit 11A (see FIG. 2(B)).

[0045] The substrate 13 is provided with wiring that guides power supplied from a power source to the light-emitting elements 111. Each of the light-emitting elements 111 is mounted on the housing 10 by being arranged on the substrate 13. Note that in this embodiment, power may be supplied to the substrate 13 from a power supply box fixed to the structure P, or power may be supplied to the substrate 13 via wiring embedded inside the structure P.

[0046] Another example of the structure of the housing 10 will be described with reference to FIG. 2(C).

[0047] The housing 10 in FIG. 2(C) does not include an inclined reflector 114, and the housing 10 includes a space around each light-emitting element 111, the space having a cylindrical side surface that allows the deep ultraviolet light emitted by the light-emitting element 111 to pass through. The end face of the cylindrical space forms a window 112 at plane H. A lens 115 is disposed in the window 112. The lens 115 functions as a window member and controls the light distribution so that the ultraviolet light emitted from the light-emitting element 111 is uniformly irradiated onto a predetermined range R on the earth's surface. The light-emitting element 111 and the lens 115 form a light-emitting unit 11B (see FIG. 2(C)).

[0048] In the configuration of the housing 10 in FIG. 4(C), a light-shielding member (not shown) may be disposed to prevent the ultraviolet light emitted by the light-emitting element 111 from returning to the substrate 13.

[0049] <<Embodiment 2>> A light emitting device 1 for inhibiting the growth of climbing plants according to a second embodiment will be described.

[0050] FIG. 3 is a diagram showing the appearance of the light emitting device 1 for inhibiting the growth of climbing plants of the second embodiment, and FIG. 4 is a diagram showing the light distribution angle of the light emitting device 1 for inhibiting the growth of climbing plants of the second embodiment.

[0051] The light-emitting device 1 for inhibiting the growth of climbing plants of the second embodiment includes the housing 10 and one or more upper housings 20. The upper housing 20 is fixed to the structure P at a higher position than the housing 10. The upper housing 20 has the same structure as the housing 10, but the light distribution is controlled so that the spread angle of the ultraviolet light increases the illuminance on the upper surface of the housing 10. Specifically, in the housing 20, the reflector of the light-emitting element 111 located closest to the periphery is cylindrical as shown in FIG. 2(C), and the reflectors of the light-emitting elements 11 other than the light-emitting element 11 located closest to the periphery can be tapered as shown in FIG. 2(B). This increases the irradiation intensity of the ultraviolet light transmitted by climbing plants near the outer edge of the housing 10.

[0052] In the following description, the surface H of the housing 10 and the upper housing 20 that is closer to the ground surface will be referred to as the lower surface, and the surface opposite to the lower surface will be referred to as the upper surface.

[0053] 3, when one upper housing 20 is fixed to a structure P above the housing 10, the lower surface of the upper housing 20 faces the upper surface of the housing 10. Ultraviolet rays are irradiated from the lower surface of the upper housing 20 toward an area including the upper surface of the housing 10. In this way, the upper housing 20 irradiates ultraviolet rays at least to vines climbing up the structure P between the housing 10 and the upper housing 20, thereby suppressing the climbing.

[0054] It is sufficient that the upper housing 20 can emit ultraviolet light with an illuminance sufficient to suppress climbing vines climbing up the structure P between the housing 10 and the upper housing 20. Therefore, it is sufficient to set the light distribution angle θ2 so that the irradiation range of the upper housing 20 coincides with the top surface of the housing 10, as shown in Figures 3 and 4. Therefore, the light distribution angle θ2 of the upper housing 20 is smaller than the light distribution angle θ1 of the housing 10. However, it is also possible to set the light distribution angle θ2 larger so that the irradiation range is larger than the top surface of the housing 10.

[0055] It is also possible to install a plurality of upper housings 20 at intervals on the structure P above the housing 10. When a plurality of upper housings 20 are set, each upper housing 20 irradiates ultraviolet light toward an area including the upper surface of the upper housing 20 placed directly below it. The light distribution angle and the spacing between the plurality of upper housings 20 can be designed so that the illuminance of the ultraviolet light is sufficient to suppress climbing vines that try to climb up the structure P between the upper housing 20 and the upper housing 20 placed directly below it.

[0056] The light distribution angles of the plurality of upper housings 20 may be the same or different.

[0057] <<Embodiment 3>> As a third embodiment, a drive circuit for the light emitting device 1 for inhibiting the growth of climbing plants according to the first and second embodiments will be described with reference to Fig. 5. Fig. 5 is a diagram showing the configuration of the drive circuit.

[0058] The drive circuit of the light emitting device 1 for inhibiting the growth of climbing plants includes a lighting circuit 131 , a control unit 132 , and a detection unit 133 .

[0059] The lighting circuit 131 is a circuit provided on the substrate 13, and supplies the light emitting element 111 with a current required for lighting.

[0060] The detection unit 133 is a human sensor that detects that a person has approached the vicinity of the light emitting device 1 for inhibiting the growth of vine plants.

[0061] The control unit 132 starts emitting ultraviolet light from the light emitting element 111 at a predetermined light-on time according to the time set in the built-in timer, and stops emitting ultraviolet light at a predetermined light-off time. For example, the control unit 132 controls the light emitting element 111 to emit ultraviolet light during a set time period, for example, at night. Furthermore, when detection unit 133 detects that a person has approached, control unit 132 stops ultraviolet radiation from light-emitting element 111. When a predetermined time has elapsed since the stop and there is no person near light-emitting device 1 for inhibiting the growth of vines, control unit 132 resumes ultraviolet radiation.

[0062] In this way, by stopping the irradiation of ultraviolet light when the approach of a person is detected, it is possible to prevent any effects on the human body and efficiently suppress the growth of creeping plants.

[0063] Furthermore, a sunlight illuminance sensor may be added to the drive circuit of embodiment 3. In this case, the control unit can determine that it is nighttime based on the output of the illuminance sensor and irradiate ultraviolet light at night or during the day.

[0064] The drive circuit of the third embodiment may further include an ultraviolet sensor that detects the illuminance of ultraviolet light emitted from the housings 10 and 20. The control unit 132 determines from the output of the ultraviolet sensor whether ultraviolet light of a predetermined illuminance required for suppressing climbing plants is being emitted from the housings 10 and 20, and controls the amount of current supplied to the light emitting element 111 so that ultraviolet light of the required illuminance is emitted.

[0065] Similarly, the drive circuit of the third embodiment may be configured to include a camera that captures images of the growth of the vine. The control unit processes the camera image to determine whether the growth of the vine is being suppressed, and adjusts the intensity of the irradiated ultraviolet light based on the result of the determination. This ensures that the growth of the vine is suppressed, while eliminating the need to irradiate ultraviolet light of unnecessary intensity.

[0066] The light-emitting device for inhibiting the growth of climbing plants according to the embodiment of the present invention described above is fixed to structures installed on roads, railways, power lines, pipelines, solar power generation facilities, vacant lots, reclaimed land, rivers, etc., and is suitable for use in inhibiting the growth of and killing climbing weeds and other plants.

[0067] Although the above describes each embodiment of the present invention, the present invention is not limited to the above-described exemplary embodiment and includes various modifications. For example, the above-described exemplary embodiment has been described in detail to facilitate understanding of the present invention, and the present invention is not limited to an embodiment including all of the components described herein. Furthermore, it is possible to replace part of the components of one exemplary embodiment with the components of another exemplary embodiment. It is also possible to add the components of another exemplary embodiment to the components of one exemplary embodiment. Furthermore, it is also possible to add, delete, or replace part of the components of each exemplary embodiment with other components. Furthermore, some or all of the above-described components, functions, control units, control means, etc. may be implemented in hardware, for example, by designing them as integrated circuits. Furthermore, the control lines and information lines in the figures are only those considered necessary for explanation, and are not necessarily all shown. It is also possible to consider that almost all components are interconnected.

[0068] Furthermore, the functional configuration of the light-emitting device 1 for inhibiting the growth of vine plants described above has been classified according to the main processing content for ease of understanding. The classification method and names of the components do not limit the present invention. As described above, the configuration of the light-emitting device 1 for inhibiting the growth of vine plants can be classified into more components according to the processing content. Furthermore, one component can be classified to perform even more processes. [Explanation of symbols]

[0069] 1: Light emitting device for inhibiting the growth of climbing plants, 10: Housing, 11, 11A, 11B: Light emitting section, 12: Through hole, 13: Substrate, 20: Upper housing, 111: Light emitting element, 112: Window, 113: Window member, 114: Reflector, 115: Lens, 131: Lighting circuit, 132: Control section, 133: Detection section, H: Surface, P: Structure, P1: Base, R: Predetermined range, θ1, θ2: Light distribution angle

Claims

1. a housing fixed to a columnar or linear structure extending upward from the ground surface within a predetermined height range from the ground surface; a plurality of light-emitting elements that emit ultraviolet light and are arranged in the housing; The plurality of light-emitting elements are arranged along a surface of the housing facing the ground surface, and irradiate ultraviolet light onto a predetermined range on the ground surface including the base of the structure. A light-emitting device for inhibiting the growth of climbing plants.

2. 2. The light-emitting device for inhibiting the growth of vine plants according to claim 1, wherein the housing is disk-shaped and has a through-hole at the center through which the structure passes, The plurality of light emitting elements are arranged in a predetermined pattern centered on the through hole, The emission wavelength of the plurality of light-emitting elements is 200 nm or more and 280 nm or less. A light-emitting device for inhibiting the growth of climbing plants.

3. 2. The light-emitting device for inhibiting the growth of climbing plants according to claim 1, characterized in that the surface of the housing facing the ground has windows at positions corresponding to each of the light-emitting elements that allow ultraviolet light emitted by the light-emitting elements to pass through.

4. 4. The light-emitting device for inhibiting the growth of climbing plants according to claim 3, wherein the window is provided with a window member made of a material that transmits ultraviolet light.

5. 5. The light-emitting device for suppressing the growth of climbing plants according to claim 4, wherein the window member has a lens function for controlling the light distribution so that the ultraviolet light generated from the plurality of light-emitting elements is uniformly irradiated onto the predetermined area on the ground surface.

6. 4. The light-emitting device for inhibiting the growth of climbing plants according to claim 3, characterized in that a reflector is provided around the light-emitting element to reflect the ultraviolet light emitted by the light-emitting element and pass it through the window.

7. 2. The light-emitting device for suppressing the growth of climbing plants according to claim 1, wherein a substrate is arranged within the housing, and a plurality of the light-emitting elements are arranged and mounted on the substrate.

8. The light-emitting device for inhibiting the growth of climbing plants according to claim 1, The structure further includes an upper housing fixed above the housing, and a plurality of upper housing light emitting elements that emit ultraviolet light and are arranged in the upper housing, A light-emitting device for inhibiting the growth of climbing plants, characterized in that the plurality of light-emitting elements for the upper housing are arranged along a surface of the upper housing facing the upper surface of the housing, and irradiate ultraviolet light toward an area including the upper surface of the housing.

9. The light-emitting device for inhibiting the growth of climbing plants according to claim 1, the structure further includes a plurality of upper housings fixed at intervals above the housing, and a plurality of upper housing light emitting elements that emit ultraviolet light and are arranged in the upper housings, A light-emitting device for inhibiting the growth of climbing plants, characterized in that multiple light-emitting elements for the upper housing are arranged along a surface of the upper housing facing the upper surface of the housing, and irradiate ultraviolet rays toward an area including the upper surface of the housing located directly below or another upper housing.

10. 9. A light-emitting device for inhibiting the growth of climbing plants as described in claim 8, characterized in that the distribution angle of ultraviolet light emitted from the surface of the upper housing facing the top surface of the housing is smaller than the distribution angle of ultraviolet light emitted from the surface of the housing facing the ground.

11. 10. The light emitting device for inhibiting the growth of vine plants according to claim 9, wherein a surface of the upper housing facing the upper surface of the housing is provided with windows at positions corresponding to the upper housing light emitting elements, through which ultraviolet light emitted by the upper housing light emitting elements passes; a reflector is provided around the plurality of upper housing light emitting elements to reflect ultraviolet light emitted by the upper housing light emitting elements and pass the ultraviolet light through the window; The light emitting device for inhibiting the growth of climbing plants is characterized in that the reflector near the outer periphery of the upper housing is cylindrical.

12. The light-emitting device for inhibiting the growth of climbing plants according to claim 1, The area of ​​the main plane of the housing is 10 times or more the cross-sectional area of ​​the structure. A light-emitting device for inhibiting the growth of climbing plants.

13. The light-emitting device for inhibiting the growth of climbing plants according to claim 1, A human presence sensor, A light emitting device for inhibiting the growth of climbing plants, further comprising a control unit that stops emitting ultraviolet light when the human presence sensor detects a person.

14. The light-emitting device for inhibiting the growth of climbing plants according to claim 13, further comprising a timer; The control unit starts or stops irradiating ultraviolet light at the set time of the timer.

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