JP6481281B2 - Light irradiation device - Google Patents

Description

  The present invention relates to a light irradiation apparatus, and more particularly to a light irradiation apparatus that irradiates light that cures a photo-curing resin that cures when receiving ultraviolet rays or the like.

In recent years, the durability of concrete structures has become a problem, for example, a sheet made of photo-curing fiber reinforced resin is pasted on the existing concrete lining surface of the tunnel to prevent the fall of concrete pieces, etc. An anticorrosive coating layer excellent in the above has been formed.
Patent Document 1 discloses a tunnel repair and reinforcement device (ultraviolet irradiation facility) including an ultraviolet irradiation device 900 used in such a repairing device.

  In the tunnel repair / reinforcement device disclosed in Patent Document 1, an ultraviolet irradiation device 900 is installed on a working scaffold 110 of a traveling vehicle via a gantry 400 that is movable in the tunnel axial direction as shown in FIG. Is done. The gantry 400 is provided with an extendable strut 500 configured to be vertically extendable and an ultraviolet irradiation device 900 is installed at the upper end of the extendable strut 500. At the time of ultraviolet irradiation, the ultraviolet irradiation device 900 is installed so as to face the photocurable FRP sheet 140 closely attached to the concrete surface of the tunnel at a certain interval.

  Specifically, as shown in FIG. 5, the ultraviolet irradiation device 900 is arranged such that a plurality of ultraviolet lamps 910 are parallel to the axial direction of the tunnel on the upper surface of the support member 901 having a shape along the arch-shaped tunnel wall. Configured by being installed. The support member 901 is connected to the left and right end portions 920 by a hinge mechanism 930 that can be bent inward. During the work, the left and right ends 920 are expanded and used, for example, along a tunnel wall supported by a stay or the like.

JP 2011-117129 A

  However, in the conventional ultraviolet irradiation apparatus described in Patent Document 1 and the like, a low pressure mercury lamp such as a black light or a chemical lamp is generally used as a light source for curing a photocurable fiber reinforced resin that is cured by ultraviolet rays. Yes. Low-pressure mercury lamps are made of glass tubes and are often damaged at construction sites, causing environmental pollution such as internal mercury being released into the environment. Care must be taken to prevent damage to the mercury lamp glass tubes. It was necessary to proceed. In addition, there is a problem that the ultraviolet irradiation equipment becomes large, and it takes time to carry in and install the equipment, and the work cannot be efficiently performed.

  Therefore, an object of the present invention is to provide a light irradiation apparatus that is lightweight, can be easily carried in and installed, and can work efficiently.

In order to achieve the above object, a light irradiation apparatus according to the present invention includes:
A light irradiation device for curing a photocurable resin provided on the surface of a member,
A light-emitting portion having a base substrate that is deformable along the surface of the member and a plurality of light-emitting elements provided on the base substrate;
An expansion member that expands due to the gas or liquid supplied,
The light emitting unit is disposed between the photocurable resin and the expansion member.

  According to the light irradiation apparatus according to the present invention configured as described above, it is possible to provide a light irradiation apparatus that is lightweight, can be easily carried in and installed, and can work efficiently.

It is sectional drawing in one usage pattern of the light irradiation apparatus which concerns on Embodiment 1 of this invention, and has shown the cross-section when a light irradiation apparatus is installed along the ceiling wall of an arch-shaped tunnel. It is sectional drawing in the other usage type of the light irradiation apparatus which concerns on Embodiment 1 of this invention, and has shown the cross-section when it installs along the inner wall of a cylindrical flowing water pipe. It is a figure which shows the structure of the light emission part of Embodiment 1, (a) is a side view, (b) is a top view, (c) is a side surface enlarged view which expands and shows a part of side view of (a). is there. It is a top view of the light emission part of the light irradiation apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing when the conventional light irradiation apparatus is installed along the ceiling wall of an arch-shaped tunnel.

Hereinafter, a light irradiation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
Embodiment 1. FIG.
The light irradiation apparatus 100 according to the first embodiment of the present invention is a light irradiation apparatus that can irradiate light along the inner wall of a cylindrical structure, for example, as shown in FIGS. 1 and 2. The light irradiation apparatus 100 includes a light emitting unit 10 that can be deformed along an inner wall of a structure, and an expansion member 20 that is expanded by a supplied gas or liquid. Here, the inner wall of the cylindrical structure is typically an arch-shaped inner wall such as the inner wall 60 of the tunnel or the inner wall of the water pipe 61, but is an inner wall of a square cylindrical structure. Also good.

In the light irradiation apparatus according to the first embodiment, as illustrated in FIG. 3, the light emitting unit 10 includes a base substrate 11 and a plurality (m × n) (m and n are two or more) provided on the base substrate 11. The light-emitting element 1 is configured as follows.
The base substrate 11 includes a plurality of (n; n is an integer of 2 or more) long substrates 11a. As shown in FIGS. 3A and 3C, each of the long base materials 11a is formed by bending both sides of a rectangular member at a substantially right angle, and has a bottom surface 11a1 and two side walls 11a2. Thus, by making the cross-sectional shape orthogonal to the longitudinal direction U-shaped, deformation such as bending can be prevented, and the mechanical strength can be increased. The plurality of long base materials 11a configured as described above are arranged in a direction orthogonal to the longitudinal direction so that the side walls 11a2 face each other at a predetermined interval between the adjacent long base materials 11a. In the plurality of long base materials 11a arranged as described above, the opposing side walls 11a2 of the adjacent long base materials 11a are connected by connecting rings 13 at both ends (near both ends). For example, as shown in FIG. 3A, the connection ring 13 is an elliptical ring, and is provided so as to be inserted into through holes formed at both ends of the side wall 11a2 of the long base material 11a. Adjacent long substrates 11a are connected. Here, the through holes in the side wall 11 a 2 of the long base material 11 a are each formed to have a diameter larger than the diameter of the cross section of the connecting ring 13. The plurality of long base materials 11a connected as described above can freely change the angle between the bottom surfaces 11a1 while maintaining the longitudinal direction substantially parallel between the adjacent long base materials 11a. The base substrate 11 configured as described above is installed so that the center axis of the long substrate 11a is substantially parallel to the center axis of the inner wall of the cylindrical structure, and faces the inner wall of the cylindrical structure. By pressing it down, it can be deformed along the inner wall of the cylindrical structure.

  Further, a plurality (m; m is an integer of 2 or more) of light emitting elements 1 are arranged in the longitudinal direction on the long base material 11a. In the first embodiment, a substrate 15 on which wiring for supplying current to the light emitting element 1 is formed is provided on the bottom surface 11a1 of the long base material 11a, and a plurality of (m) light emitting elements 1 are provided on the substrate 15. Is provided. Further, for example, a connector 3 connected to a wiring is provided at one end of the substrate 15, and a current is supplied to each light emitting element 1 via the connector 3 and the wiring formed on the substrate 15. In addition, a tube 17 made of, for example, silicon resin is provided at one end portion of the base substrate 11 so as to straddle between the plurality of long substrates 11 a, and wiring for connecting the long substrates 11 a inside the tube 17. It is housed and connected to the connector 3 of the board 15 respectively. Here, it is preferable that the light emitting elements 1 are arranged at substantially constant intervals d1 in the respective long base materials 11a. Moreover, the space | interval between the adjacent long base materials 11a is set so that the light emitting element provided in one side of the adjacent long base material and the light emitting element provided in the other side may also be arrange | positioned at the said space | interval d1. It is preferable. In this way, light with a substantially uniform intensity can be irradiated onto the target irradiation surface. Specifically, the distance d1 between the light emitting elements 1 is preferably set in the range of 20 mm to 40 mm, more preferably about 30 mm.

The light-emitting element 1 is configured using, for example, a nitride semiconductor (mainly represented by a general formula In _x Al _y Ga _1-xy N, 0 ≦ x, 0 ≦ y, x + y ≦ 1) for a light-emitting layer. This is a nitride semiconductor light emitting device. The light-emitting element 1 can be selected so that the target emission wavelength is the In composition ratio x or the Al composition ratio y of the nitride semiconductor constituting the light-emitting layer. The light irradiation apparatus according to the first embodiment is configured using, for example, a light-emitting element that emits light in a visible region having a relatively short wavelength from the ultraviolet region. In addition, the nitride semiconductor light-emitting element can adjust the composition of the light-emitting layer so as to emit light in a relatively narrow range of wavelengths, for example, a light irradiation device used for curing a photo-curing resin Then, it can adjust so that the light of the wavelength which can harden photocuring resin most efficiently can be irradiated. Specifically, it can be adjusted to emit ultraviolet light (UV-A) having a wavelength of 315 nm to 405 nm. In particular, it may be preferable from the viewpoint of energy utilization efficiency that the ultraviolet ray (UV-B) having a wavelength of 280 nm to 315 nm is not substantially contained. For example, a light irradiation device used for curing a photocurable resin may be configured using a nitride semiconductor light emitting element having an emission peak wavelength of 395 nm. The emission peak wavelength is basically set based on the wavelength at which the photo-curing resin can be cured most efficiently, but when setting the irradiation light wavelength, the thickness of the target photo-curing resin ( It is preferable to consider sheet thickness or coating thickness. For example, when curing an ultraviolet curable resin provided with a certain sheet thickness, for example, ultraviolet light with a relatively short wavelength of 365 nm has a relatively large attenuation within the sheet, and a thick sheet cannot be cured sufficiently to the inside. There is. In such a case, it is preferable to select ultraviolet rays having a wavelength of about 405 nm, for example, in which the attenuation in the sheet is relatively small.

Moreover, the semiconductor light emitting element usually has directivity for emitting strong light within a certain angle range. Therefore, for example, in a light irradiation device used for curing a photo-curing resin, in order to irradiate light substantially uniformly to the photo-curing resin, in consideration of the directivity of the semiconductor light-emitting device to be used, It is preferable to set a distance from the light irradiation surface. Therefore, in the first embodiment, in order to keep the distance between the light emitting element 1 and the light irradiation surface that emits light within an appropriate range, for example,
The height h of the side wall 11a2 of the long base material 11a is set as follows.

For example, as shown in FIG. 3C, the light distribution angle of the light emitting element 1 is 2θ, and the width of the bottom surface 11a1 of the long base material 11a is W. At this time, if the height h of the side wall 11a2 is set to be equal to or less than ((W / 2 tan θ) + the thickness of the substrate 15 + the thickness of the light emitting element 1), the photo-curing resin can be irradiated with light substantially uniformly. . As an example of the height h of the side wall 11a2, it is set to about 10 mm.
Furthermore, as an example of W, the width of the bottom surface 11a1 of the long base material 11a is preferably about 25 mm.

The distance (operation distance) between the light emitting element 1 and the irradiation target surface provided with the photo-curing resin is substantially uniform on the irradiation target surface based on the directivity of the light emitting element 1 and the interval between the adjacent light emitting elements 1. It is set to irradiate with an illuminance of. Specifically, the light emitted from the light emitting element 1 has directivity as described above, and the light distribution at a position away from the optical axis is weaker than the light distribution at a position near the optical axis. Tend to be. Therefore, in the first embodiment, the distance between the light emitting element 1 and the photo-curing resin can be set so that the light distribution between the light emitting elements 1 adjacent to each other overlaps the light distribution at positions away from the optical axis. preferable. In the first embodiment, as shown in FIG. 3 and the like, the necessary operating distance is maintained by the spacing members 19 (spacers) provided at both ends of each long base material 11a. Assuming that a nitride semiconductor light-emitting element having a light distribution angle 2θ of around 130 ° is used as the light-emitting element, for example, the light-emitting elements 1 are arranged at substantially constant intervals d1 in the respective long base materials 11a and adjacent to each other. When the light emitting element provided on one side of the long base material and the light emitting element provided on the other side are arranged with the distance d1 therebetween, a distance equal to or greater than the distance d1 is secured as the operating distance. It is preferable. In addition, the light emitting elements 1 are arranged at substantially constant intervals d1 in the respective long base materials 11a, whereas the light emitting elements provided on one of the adjacent long base materials and the light emitting elements provided on the other side. Is disposed with a distance d2 larger than the distance d1, it is preferable to secure a distance equal to or greater than the distance d2 as the operating distance. In addition, it is preferable to set the operating distance as short as possible as long as the light is irradiated onto the irradiation target surface with substantially uniform illuminance, and thereby it is possible to irradiate the irradiation target surface with substantially uniform illuminance and high illuminance. it can.
Moreover, when the upper end of the side wall 11a2 of the long base 11a and the photo-curing resin are brought close to each other, the photo-curing resin that is in contact with the upper end of the side wall 11a2 is not sufficiently irradiated with light, and the portion is not sufficiently cured. Therefore, it is preferable that the upper end of the side wall 11a2 and the photo-curing resin are opposed to each other with a certain distance. In this Embodiment 1, the required space | interval is maintained by the space | interval holding member 19 provided in the both ends of each long base material 11a. Here, when a nitride semiconductor light emitting element having a light distribution angle 2θ of around 130 ° is used as the light emitting element, the distance d3 between the upper end of the side wall 11a2 and the photo-curing resin is, for example, the distance between the light emitting elements (maximum distance). ) Is preferably set to 1/3 or more. In the first embodiment, the connecting ring 13 may be provided with a spacer function, and the operating distance and the distance d3 between the upper end of the side wall 11a2 and the photo-curing resin may be set without using the spacing member 19.

Moreover, in the light irradiation apparatus of Embodiment 1, the expansion | swelling member 20 which expand | swells with the gas or liquid supplied is installed on the work table 30, for example, as shown in FIG.
The expansion member 20 is preferably made of, for example, a material that has a high air holding power, is inexpensive, and has excellent weather resistance such as cold resistance. The expansion member 20 is preferably made of a material that can be elastically deformed. If the expansion member 20 can be elastically deformed, the expansion member before expansion can be made small, and the light irradiation device when not in use can be easily stored compactly. Specifically, the expansion member 20 is made of butyl rubber, latex, polyurethane, or the like. Among the materials listed above, butyl rubber having high air holding power, low cost, and high cold resistance is excellent. For example, when weight is important, latex or polyurethane can also be used. Moreover, it is preferable that the expansion member 20 has a valve provided with a valve mechanism.

The light irradiation apparatus 100 according to the first embodiment configured as described above is used as follows when, for example, the photocurable resin 50 attached to the inner wall of the tunnel shown in FIG. 1 is cured.
First, the expansion member 20 is installed on the work table 30, and the light emitting unit 10 is installed on the expansion member 20. Here, the work table 30 does not need to be special, and for example, the work table used when the photo-curing resin 50 is attached can be used.
Next, air is injected from the bulb into the expansion member 20 until the light emitting unit 10 is held at a predetermined interval with respect to the photocurable resin 50 applied to the inner wall of the tunnel. At this time, since the expansion member 20 isotropically presses the light emitting unit 10 in a direction orthogonal to the inner wall of the tunnel, the light emitting unit 10 can be pressed and supported in a direction orthogonal to the inner wall with a constant force.
Next, the light emitting element 1 is turned on in a state where the light emitting unit 10 is held from the photocurable resin 50 at a predetermined interval, and the photocurable resin 50 is irradiated for a certain period of time.
After the photo-curing resin 50 is cured at a certain location, the work table 30 may be moved and the same operation may be repeated at the next location.

Further, for example, when the photo-curing resin 51 applied or pasted on the inner wall of the flowing water pipe 61 shown in FIG. 2 is cured, the light irradiation device 100 of the first embodiment is used as follows.
First, the light emitting unit 10 is wound around the outer periphery of the expansion member 21 before being expanded, and is inserted into a predetermined position of the flowing water pipe 61.
Next, air is injected from the valve into the expansion member 21 until the light emitting unit 10 is held at a predetermined interval by the photocurable resin 51 applied to the inner wall of the water flow pipe 61. At this time, since the expansion member 20 isotropically presses the light emitting unit 10 in a direction orthogonal to the inner wall of the water pipe 61, the light emitting unit 10 can be pressed and supported in a direction orthogonal to the inner wall with a constant force. .
Next, the light emitting element 1 is turned on in a state where the light emitting unit 10 is held from the photocurable resin 51 at a predetermined interval, and the photocurable resin 51 is irradiated for a certain period of time.
After the photo-curing resin 51 is cured at a certain place, the air in the expansion member 21 is once evacuated and moved in a state where it can be troubled, and the same operation may be repeated at the next place.

According to the light irradiation apparatus 100 according to the first embodiment configured as described above, for example, since the light emitting device 1 including a light emitting diode is used, for example, the photocurable resin is cured most efficiently. It is possible to irradiate only light having a wavelength that can be generated, and it is possible to suppress light emission of wasted light.
In addition, by using the light emitting unit 10 configured as described above, for example, it is possible to irradiate the light curable resin with light from a position where the light curable resin can be cured most efficiently, and energy is saved. The photo-curing resin can be cured without being wasted.
Therefore, according to the light irradiation apparatus of the first embodiment, for example, the photo-curing resin can be cured with less energy consumption.
Moreover, when the light irradiation apparatus of this Embodiment 1 is used as a light irradiation apparatus which hardens photocuring resin, it can irradiate by making the light emission part 10 approach photocurable resin from the conventional light irradiation apparatus. For example, what conventionally took about 30 minutes to cure the photo-curing resin can be cured in 10 minutes or less, for example, about 5 minutes.
In particular, for example, an ultraviolet light-emitting diode (UV-LED) configured using a nitride semiconductor can irradiate a photo-curing resin with ultraviolet light having a higher illuminance than a black light, and thus can shorten the curing time. .

Moreover, according to the light irradiation apparatus 100 which concerns on this Embodiment 1, since it can comprise using semiconductor light emitting elements, such as a light emitting diode, it is lightweight and there is little fear of a damage.
Furthermore, since the light irradiation apparatus 100 according to the first embodiment supports the light emitting unit along the inner wall of a tunnel or the like by injecting air such as the expansion members 20 and 21, like the conventional ultraviolet irradiation apparatus 900. In addition, there is no need for a large-scale mechanical device such as a telescopic support column 500 that can be expanded and contracted and a support member 901 having a hinge structure, and it can be stored and carried in a compact manner. Work can proceed.

  In Embodiment 1 described above, the adjacent long base materials 11a are connected by the connection ring 13, but the present invention is not limited to this. For example, the long base material 11a may be supported substantially parallel and deformable by a plurality of braided wires. In addition, for example, the long base material 11a may be supported substantially parallel and deformable by the first support bar that supports one end portion and the second support bar that supports the other end portion, respectively. Good.

Embodiment 2. FIG.
The light irradiation apparatus according to the second embodiment of the present invention is configured by using, for example, a light emitting unit 12 that can be deformed along a dome-shaped inner wall instead of the light emitting unit 10 according to the first embodiment. The configuration is the same as in the first embodiment.

In the light emitting unit 12 of the second embodiment, the base base material 14 is configured by a plurality of box-type base materials 14a on which the light emitting elements 1 are provided. The plurality of box-shaped base materials 14a are arranged in a matrix as shown in FIG. Here, “arranging in a matrix” means, for example, that the centers of the plurality of box-shaped base materials 14a are arranged so as to coincide with the lattice points of a rectangular lattice. As shown in FIG. 4, each of the box-shaped base materials 14a is formed by bending four sides of a rectangular member at a substantially right angle, and has a bottom surface 14a1 and four side walls 14a2. Each of the light emitting elements 1 is provided, for example, at the center of the bottom surface 14a1 of the box-type base material 14a. The plurality of box-type base materials 14 a configured and arranged as described above are connected to the three box-type base materials 14 a adjacent at the four corners by the connection ring 16. For example, as shown in FIG. 4, the connection ring 16 is a circular ring, and is provided so as to be inserted into through holes formed in the side walls 14 a 2 at the corners to connect adjacent box-type base materials 14 a. To do. Here, the through-holes in the side wall 14a2 of the box-type base material 14a are each formed to have a diameter larger than the diameter of the cross section of the connecting ring 16. The plurality of box-type base materials 14a connected as described above can freely change the angle with respect to the bottom surface 14a1 of the adjacent box-type base materials 14a.
Therefore, the base substrate 14 configured as described above is pressed toward the dome-shaped inner wall of the structure so that the bottom surface 14a1 of the box-shaped substrate 14a is substantially parallel to the dome-shaped inner wall. Can be deformed.

The light irradiation device of the second embodiment configured as described above can be used in the same manner as the light irradiation device of the first embodiment, has the same effect, and can be supported along the dome-shaped inner wall. The dome-shaped inner wall can be irradiated with light having a substantially uniform intensity.
Although not shown in FIG. 4, the base substrate 14 maintains an interval for setting the operating distance between the light emitting element 1 and the dome-shaped inner wall (irradiation target surface) provided with the photo-curing resin within a predetermined range. It is preferable to provide a member. For example, the spacing members are provided on each box-type base material 14a, and the operating distance is set so that light having a substantially uniform intensity is irradiated onto the inner wall of the dome shape.

In the light irradiating devices of the first and second embodiments described above, the expansion members 20 and 21 and the light emitting units 10 and 12 are configured separately. However, this invention is not limited to this, You may comprise the expansion members 20 and 21 and the light emission parts 10 and 12 integrally.
Specifically, a plurality of light emitting elements are arranged on the surfaces of the expansion members 20 and 21, and the light emitting elements are connected by electrode wiring formed on the surfaces of the expansion members 20 and 21. In this way, it is possible to provide a light irradiation device that is easier to install.

DESCRIPTION OF SYMBOLS 1 Light emitting element 3 Connector 10, 12 Light emission part 11, 14 Base base material 11a Long base material 11a1, 14a1 Bottom surface 11a2, 14a2 Side wall 13, 16 Connection ring 14a Box-type base material 15 Substrate 17 Tube 19 Spacing holding member 20, 21 Expansion member 100 Light irradiation device

Claims (8)

And irradiation target member deformable base material along the surface of the irradiating light is provided on the base substrate, a light emitting unit having a plurality of light emitting elements for irradiating light onto a surface of the irradiation target member ,
An expansion member that expands due to the gas or liquid supplied,
The light emitting portion is disposed on the front Symbol inflatable member, the base substrate, n pieces arranged in a direction perpendicular to the longitudinal direction (n is an integer of 2 or more) an elongate substrate,
In the long substrate, m (m is an integer of 2 or more) light emitting elements are arranged in the longitudinal direction,
The n long base materials are light irradiation devices supported to be bendable between adjacent long base materials . The light irradiation apparatus according to claim 1 , wherein in the long base material, the m light emitting elements (m is an integer of 2 or more) are arranged at a substantially constant interval d1. 3. The n long substrates are supported according to claim 2 , wherein a light emitting element provided on one of the adjacent long substrates and a light emitting element provided on the other are arranged with a distance d1 therebetween. Light irradiation device. A light emitting unit comprising: a base substrate that is deformable along a surface of an irradiation target member that irradiates light; and a plurality of light emitting elements that are provided on the base substrate and irradiate light on the surface of the irradiation target member; ,
An expansion member that expands due to the gas or liquid supplied,
The light emitting portion is disposed on the expansion member;
The base substrate includes a plurality of box-shaped substrates arranged in a matrix,
Light emitting elements are arranged in each box-type substrate,
The plurality of box-type substrates are light irradiation devices supported so as to be foldable between adjacent box-type substrates. The light emitting device according to any one of claims 1 to 4 , wherein the light emitting unit includes an interval holding member that holds the plurality of light emitting elements at an interval d2 from the surface of the irradiation target member. The light irradiation apparatus according to claim 5 , wherein the distance d <b> 2 is greater than or equal to the distance d <b> 1 between light emitting elements. The inflatable member, the light irradiation device according to any one of claims 1 to 6 made of an elastic deformable material. Light irradiation apparatus according to any one of claims 1-7 wherein the plurality of light emitting device that emits ultraviolet rays, respectively.

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