Irradiation device

Abstract

The irradiation device is provided with: a plurality of flexible substrates (10) which are spirally arranged on a cylindrical surface at equal intervals and on which a plurality of light sources are arranged; the same number of flexible substrates (20) are arranged in a reverse spiral shape. The two substrates are arranged in such a manner that one end of each substrate intersects, and the other end of each substrate intersects the other end corresponding to the spiral shape. The two substrates are rotatably connected together at the intersection of the two end portions and at the other intersection where the two end portions intersect in accordance with the spiral shape.

Description

Technical Field

[0001] The present invention relates to an irradiation device which is arranged inside a cylindrical body and irradiates light toward the inner wall of the cylindrical body. Background Art

[0002] In order to repair a cylindrical pipe such as a sewer pipe, a pipe lining member composed of a tubular soft resin absorbent impregnated with a curable resin can be used. The pipe lining member is conveyed into the pipe by turning it over or pulling it in, and the curable resin is cured while adhering to the inner surface of the pipe, and the inner circumference thereof becomes a lining. The curable resin may be a thermosetting resin, a light curing resin, or a combination thereof, and the light curing resin is cured by ultraviolet light emitted from an ultraviolet light source.

[0003] Patent document 1 describes a structure in which a curing device having a plurality of ultraviolet light sources arranged in a circumferential direction is installed on a light source wagon, and the light source wagon is moved in a pipe to cure the photocurable resin impregnated in the pipe lining.

[0004] Patent Document 2 describes a structure in which a plurality of ultraviolet lamps are connected to form a light train, and ultraviolet rays are irradiated onto a pipe lining material to cure a photocurable resin.

[0005] Patent Document 3 describes a structure in which a plurality of LEDs emitting ultraviolet rays are arranged on the surface of a cylindrical body, and the cylindrical body is caused to travel in a pipe to cure a photocurable resin impregnated in a pipe lining.

[0006] Prior Art Literature

[0007] Patent Literature

[0008] Patent document 1: Japanese Patent Application Laid-Open No. 9-57851.

[0009] Patent document 2: Japanese Patent Application Laid-Open No. 11-198230.

[0010] Patent Document 3: Japanese Patent Application Publication No. 2008-142996. Summary of the invention

[0011] The irradiation devices described in Patent Documents 1 to 3 all have a structure in which an ultraviolet light source or a cylinder equipped with an ultraviolet light source is arranged at the center of the pipe, so that the pipe lining is irradiated with ultraviolet light relatively evenly.

[0012] However, when there is a distance between the light source and the tube wall, there is a problem that a higher power light source needs to be used to ensure the cumulative illumination, or the pulling speed needs to be reduced to extend the irradiation time.

[0013] In addition, when the tube diameter is constant, relatively uniform illumination can be obtained, but when the tube diameter is different, since the radial distance from the light emitting center of the light source is different up and down, there is a disadvantage that uniform illumination cannot be obtained. Therefore, there is a problem that a complex mechanism is required to adjust the height of the illumination device corresponding to the tube diameter.

[0014] The present invention is made to solve these problems, and its object is to provide an irradiation device that can uniformly irradiate light onto the inner wall surface of a pipe when the pipe diameter changes.

[0015] The present invention (technical solution 1) is an irradiation device, which is arranged inside a cylindrical body and irradiates light toward the inner wall of the cylindrical body. The irradiation device is characterized in that it includes:

[0016] A plurality of long and flexible first substrates are arranged in a spiral shape at equal intervals on a cylindrical surface and are provided with a plurality of light sources;

[0017] A second substrate having a long strip and flexibility, located on the opposite side of the surface of the first substrate where the light source is arranged, and arranged in a counter-spiral shape with the first substrate, and the number of the second substrates is the same as the number of the first substrates;

[0018] The first substrate and the second substrate are arranged in such a manner that one end of each substrate intersects with the other end of each substrate and the other end of each substrate intersects with the other end of each substrate corresponding to the spiral shape.

[0019] The first substrate and the second substrate are rotatably connected together at intersections of respective end portions of the first substrate and the second substrate and at other intersections where the first substrate and the second substrate intersect in accordance with the spiral shape.

[0020] According to the present invention, since the substrates equipped with a plurality of light sources are arranged in a spiral shape, uniform irradiation without deviation in the circumferential direction can be achieved even when the irradiation device is expanded or reduced in diameter. In addition, even when the diameter of the cylindrical body equipped with the irradiation device changes, since the irradiation device expands or reduces in diameter in accordance with the diameter, the irradiation distance from the inner wall of the cylindrical body is constant, and uniform irradiation without light quantity difference can be achieved. In addition, since each light source is still located near the inner wall surface even when the diameter of the cylindrical body changes, effective irradiation can be achieved even with a low-power light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of a first substrate on which a plurality of LED light sources are arranged.

[0022] Figure 2 is a side view of the first substrate.

[0023] Figure 3This is a plan view of a second substrate that is disposed inside the first substrate and rotatably connected to the first substrate.

[0024] Figure 4 It is a perspective view of a light source module in which first and second substrates are intersected and arranged in a grid pattern.

[0025] Figure 5 This is an expanded view of a portion of a light source assembly unfolded in a plane.

[0026] Figure 6 It is a three-dimensional diagram showing a driving mechanism that causes a light source assembly to expand or reduce its diameter.

[0027] Figure 7 This is an explanatory diagram showing the arrangement of a mounting plate at an intersection where a first substrate and a second substrate are mounted.

[0028] Figure 8 is a top view of the mounting plate.

[0029] Fig. 9 is a side view of the mounting plate.

[0030] Fig.10 This is a side view of the drive mechanism when the mounting plate is located at the uppermost position.

[0031] Fig.11 This is a side view of the drive mechanism when the mounting plate is in the lower position.

[0032] Fig.12a This is a front view of the movable plate that enables the mounting plate to move.

[0033] Figure 12b It is a perspective view showing a part of the movable plate.

[0034] Fig.13 It is an explanatory diagram showing the arrangement of the first and second substrates when the diameter of the light source module is expanded or reduced.

[0035] Fig.14 This is an explanatory diagram showing a state where a plurality of irradiation devices after the diameter expansion are connected in a tube. DETAILED DESCRIPTION

[0036] The present invention is used to irradiate light onto a lining member applied to the inner wall of a pipe such as a sewer, so that the curable resin impregnated in the lining member is cured, but is not limited to this. It can also be applied to an embodiment in which the lining member is arranged inside a cylindrical body and light is irradiated onto the inner wall of the cylindrical body.

[0037] exist Figure 1 , Figure 21 shows a thin substrate 10 (first substrate) made of a long metal strip having flexibility and elasticity. A plurality of light sources (12 in this embodiment) are arranged at equal intervals on the substrate 10. The light source is, for example, an LED 11 that emits any one of ultraviolet rays, visible rays, and infrared rays, or an LED composed of a combination of LEDs that emit these rays.

[0038] Each LED 11 is connected in series by leads (not shown) arranged along the groove 12, and is powered by the connector 13 to emit the above-mentioned light. Figure 1 In the embodiment, a connection pin 15 ( Figure 4 ) through a plurality of circular holes 14 (five in the present embodiment), the connecting pin 15 is used to be rotatably (freely) connected to a substrate 20 (second substrate) to be described later.

[0039] Figure 3 The substrate 20 is shown to be arranged crosswise with the substrate 10. The substrate 20 has the same number, shape, and length as the substrate 10, and is made of the same or different material as the thin substrate 10 made of a long metal strip having flexibility and elasticity. On the substrate 20, circular holes 21 are formed at positions corresponding to the circular holes 14 of the substrate 10, through which the connecting pins 15 pass, and openings 22 are formed between the circular holes 21. In the case where the materials or thicknesses of the substrates 10 and 20 are different, the openings 22 have the function of adjusting the bending degrees of the substrates 10 and 20 to the same degree.

[0040] like Figure 4 As shown, the substrates 10 are arranged spirally at equal intervals t1 on the cylindrical surface, and the substrates 20 are arranged in a counter-spiral manner in the opposite direction of the spiral winding direction of the substrates 10 at equal intervals t1 on the opposite side of the surface of the substrate 10 where the LEDs 11 are arranged.

[0041] The ends 10a and 20a of the substrate 10 and the substrate 20 are crossed so that the circular holes 14 and 21 are aligned, and the connecting pin 15 is inserted into the circular holes 14 and 21. Figure 4 As shown in the enlarged view, one end 15a of the connecting pin 15 is larger than the diameter of the circular hole 14. In addition, the other end 15b is a riveted end. After the other end 15b is riveted, the substrate 10 and the substrate 20 are connected together in a rotatable manner with the connecting pin 15 as the axis.

[0042] Since the other ends 10b and 20b of the substrate 10 and the substrate 20 intersect with the other ends 10b and 20b of the different substrates 10 and 20 in a spiral shape, the circular holes 14 and 21 are aligned and connected together by the connecting pin 15 in a rotatable manner. Since the substrate 10 and the substrate 20 intersect at multiple locations (three locations in this embodiment) in accordance with the spiral shape in addition to the two ends, the intersections are also connected together by the connecting pin 15 in a rotatable manner. In addition, the end 15b of the connecting pin 15 can be fixed not only by riveting, but also by using ultra-low head screws, E-shaped rings, etc.

[0043] In this way, the substrate 10 and the substrate 20 can be rotatably connected at the intersection of each end portion and at another intersection corresponding to the spiral shape, and arranged in a lattice shape to assemble as shown in the figure. Figure 4 The light source unit 30 in which the cylindrical irradiation device shown functions. Figure 5 A portion of the light source assembly 30 is shown in a planar manner. The number of substrates 10 and substrates 20 used may vary depending on the required irradiation intensity or the tube diameter configured for the irradiation device, but is preferably about 10 to 30. In this embodiment, an example of using 20 substrates 10 and substrates 20 respectively is shown.

[0044] Since the substrate 10 and the substrate 20 are connected together at the intersection in a rotatable manner, when a force is applied to the light source assembly 30 in a manner of expanding or contracting the diameter, the substrate 10 and the substrate 20 will rotate at the intersection, and accordingly, the light source assembly 30 will expand or contract in its extension direction (length direction). On the other hand, when a contraction force is applied to the light source assembly 30 in the length direction, the substrate 10 and the substrate 20 will also rotate at the intersection, and the light source assembly 30 will expand or contract in diameter.

[0045] Figure 6 The driving mechanism 40 is arranged inside the light source assembly 30 and causes the light source assembly 30 to expand or contract. The driving mechanism 40 has a plurality of (four in this embodiment) metal mounting plates 41 mounted at the intersection of the substrate 10 and the substrate 20. The mounting plates 41 extend parallel to the cylindrical axis of the light source assembly 30, as shown in FIG. Figure 7 As shown, the mounting plates 41 are arranged at prescribed intervals (equal intervals in this embodiment) in the circumferential direction of the cylinder. Since the mounting plates 41 stabilize the shape of the light source assembly 30 and make it easier to expand or reduce the diameter, the more the better, but since the more the mounting plates 41, the more complicated the structure of the driving function, the preferred number is 3 to 6.

[0046] like Figure 5 , Figure 8 , Fig. 9 As shown, the mounting plate 41 has: a flat portion 41a having a length t3 longer than the cylindrical length t2 of the light source assembly 30; and protruding portions 41b and 41c having the same length and a curved shape protruding outward by a distance h1 in the radial direction from the plane of the flat portion 41a. A circular hole 41d is formed in the center of the flat portion 41a where the mounting substrate 10 and the substrate 20 intersect.

[0047] In this embodiment, if Figure 5 As shown, the mounting plate 41 is configured in such a way that the two ends where the substrate 10 and the substrate 20 intersect are located on the mounting plate 41, and the substrate 10 and the substrate 20 are mounted on the mounting plate 41 at a point where they intersect between the two ends. Since the substrate 10 and the substrate 20 intersect in the middle of the mounting plate 41, the intersection corresponds to the circular hole 41d of the mounting plate 41, and is rotatably mounted on the mounting plate 41 by the connecting pin 15. Since there are 20 substrates 10 and 20 respectively and 4 mounting plates 41, the same Figure 5 As shown by the arrow, the middle intersection will be installed on the mounting plate 41. By installing the mounting plate 41 and the intersection, the light source assembly 30 will not be deformed, and the light source assembly 30 can be easily and reliably expanded or reduced in diameter.

[0048] like Fig.10 As shown, the driving mechanism 40 has a support leg 42 and a support leg 43 of the same length and rotatably connected in an X shape by a joint 44. One end 42a of the support leg 42 is rotatably connected to a pedestal 45 fixed to one end of a mounting plate 41, and the other end 42b is mounted on a movable plate 50. One end 43a of the support leg 43 is rotatably connected to a pedestal 47 that moves along a track 46 fixed to the other end of the mounting plate 41, and the other end 43b is rotatably mounted on a fixed plate 60 fixed to a frame 61.

[0049] like Fig.12a As shown, the periphery of the movable plate 50 is formed with grooves 50a corresponding to the number of the mounting plates 41 (four in this embodiment), and the other end 42b of the supporting foot 42 is rotatably connected to the movable plate 50 at the groove 50a via a coupling composed of a bolt 51, a nut 52 and a round tube 53.

[0050] The fixed plate 60 has the same shape and structure as the movable plate 50 , and the same groove as the movable plate 50 . The other end 43 b of the support leg 43 is rotatably connected to the fixed plate 60 at the groove through the same coupling.

[0051] Since the supporting legs 42 and 43 are provided in a number corresponding to the number of the mounting plates 41 , the other supporting legs are similarly rotatably mounted on the movable plate 50 and the fixed plate 60 .

[0052] The drive mechanism 40 is provided with a drive motor 62 which is fixed to a frame 61 for moving the movable plate 50 and is configured as a DD (Direct Drive) motor. A rotating shaft 62a of the drive motor 62 passes through a circular hole 50b provided at the center of the movable plate 50, and a thread is formed in the circular hole 50b to mesh with a thread formed on the rotating shaft 62a of the drive motor 62.

[0053] In the cylinder 64 and the cylinder 65 ( Figure 6 ) are arranged between the grooves 50a of the movable plate 50 to guide the movement of the movable plate 50. Fig.12a When the driving motor 62 rotates, the movable plate 50 also wants to rotate, but since the rotation is blocked by the guide rod 63, the movable plate 50 moves parallel to the guide rod 63.

[0054] When the drive motor 62 is driven in this structure, the movable plate 50 will Fig.10 As shown by the double arrows, it moves left and right corresponding to the rotation direction of the drive motor 62. Since one end 43a of the support leg 43 moves along the track 46 along with the movement of the movable plate 50, each mounting plate 41 moves in the radial direction. Fig.11 The state where the mounting plate 41 moves in the direction in which the radial distance is shortened is shown.

[0055] The intersection of the substrate 10 and the substrate 20 is mounted on each mounting plate 41 , so that the substrate 10 and the substrate 20 will rotate in accordance with the expansion and contraction of the radial distance of each mounting plate 41 , so that the intersection angle changes, and the light source assembly 30 will expand or shrink in diameter.

[0056] Fig.13 The upper section shows a state in which the radial distance of the mounting plate 41 is lengthened and the light source assembly 30 is expanded and shortened in the length direction in a planar unfolded state. The lower section shows a state in which the radial distance of the mounting plate 41 is shortened and the light source assembly 30 is reduced and extended in the length direction.

[0057] Since the substrate 10 on which the LEDs 11 of the light source assembly 30 are mounted is arranged in a spiral shape, Fig.13 It can be seen that the light source unit 30 can be uniformly irradiated in the circumferential direction even when the diameter is expanded or reduced. In addition, since the light source unit 30 is connected to the drive mechanism 40 via the mounting plate 41, the diameter can be reliably and easily expanded or reduced in accordance with the radial movement of the mounting plate 41.

[0058] In the drive mechanism 40 , a male coupler 70 is mounted on the cylindrical body 65 so that the drive mechanism 40 can be connected in multiple units, and a female coupler 71 is mounted on the cylindrical body 64 via a multi-core cable 72 .

[0059] Fig.14 The figure shows a state where a plurality of drive mechanisms 40 are connected together through couplers 70, 71 in a tube 81, and the tube 81 is covered with a lining member 80 impregnated with a light-curing resin or a thermosetting resin in addition thereto. In addition, if the light source assembly 30 is shown in detail, the drawing will become more complicated, so the substrate 10 is only shown schematically in bold lines.

[0060] The drive mechanism 40 is pulled by a pulling rope (not shown) in a connected state and moves in the direction indicated by the arrow. The mounting plate 41 is moved radially until the protrusions 41b and 41c of each mounting plate 41 contact the pipe wall by driving the drive motor 62. The light source assembly 30 expands in diameter in accordance with the movement of the mounting plate 41, and the curable resin impregnated in the lining member 80 is irradiated and hardened by the light emitted from the light source assembly 30. The last drive mechanism 40 is equipped with a camera unit 83 through a coupler 70, so that the curing state of the lining member 80 can be observed.

[0061] like Fig.14 As shown in the enlarged view of FIG. 4 , even if the tube diameter changes, the protrusions 41b and 41c of each mounting plate 41 will contact the tube wall, so the distance between each LED 11 and the tube wall can be kept constant, and the amount of irradiation to the tube wall can be made uniform. Furthermore, even if the tube diameter changes, since each LED 11 is located near the inner wall surface of the tube, even a low-power light source can achieve effective irradiation.

[0062] In addition, the connectors 13 of each substrate 10 are connected in parallel. Each LED 11 of the substrate 10 is connected to the connector 13 on the substrate 10, and each connector 13 is connected in parallel. Therefore, even if one of the LEDs 11 fails, only the substrate 10 on which it is installed will not function properly, and the LEDs 11 of other substrates 10 will still light up and can provide effective illumination. In order to avoid complications, Fig.14 Although the connection wires are not shown, they are connected to a power source arranged inside or outside the irradiation device.

[0063] Explanation of symbols: 10 substrate 11 LED

[0064] 13 Connectors

[0065] 15 Connecting pin

[0066] 20 substrate

[0067] 22 Opening

[0068] 30 light source assembly 40 driving mechanism 41 mounting plate

[0069] 42, 43 Support feet 50 Movable plate

[0070] 60 Fixed plate

[0071] 61 Frame

[0072] 62 driving motor 63 guide rod

[0073] 64, 65 Cylinder 70, 71 Coupler 80 Liner

[0074] 81 tube 83 camera unit

Claims

1. An irradiation device, arranged inside a cylindrical body, irradiating light toward the inner wall of the cylindrical body, the irradiation device being characterized in that it comprises: A plurality of long and flexible first substrates are arranged in a spiral shape at equal intervals on a cylindrical surface and are provided with a plurality of light sources; A second substrate having a long strip and flexibility, located on the opposite side of the surface of the first substrate where the light source is arranged, and arranged in a counter-spiral shape with the first substrate, and the number of the second substrates is the same as the number of the first substrates; The first substrate and the second substrate are arranged in such a manner that one end of each substrate intersects with the other end of each substrate and the other end of each substrate intersects with the other end of each substrate corresponding to the spiral shape. The first substrate and the second substrate are rotatably connected together at intersections of respective end portions of the first substrate and the second substrate and at other intersections where the first substrate and the second substrate intersect in accordance with the spiral shape.

2. The irradiation device according to claim 1, characterized in that A driving mechanism is provided, which is arranged at a predetermined interval in the circumferential direction so that a plurality of mounting plates on which the long strips of the intersections of the first substrate and the second substrate are mounted move in the radial direction, and the first substrate and the second substrate move in the radial direction according to the radial movement of the mounting plates.

3. The irradiation device according to claim 2, characterized in that Curved protrusions protruding from a surface of the mounting plate to the outside in the radial direction are provided at both ends of the mounting plate.

4. The irradiation device according to claim 2, characterized in that The mounting plate is arranged in such a manner that both ends where the first substrate and the second substrate intersect are located on the mounting plate surface, and between the two ends, a portion where the first substrate and the second substrate intersect is mounted on the mounting plate.

5. The irradiation device according to claim 1, characterized in that The light source is an LED that emits any one of ultraviolet rays, visible rays, and infrared rays, or an LED that is a combination of LEDs that emit these rays.

6. The irradiation device according to claim 1, characterized in that The light sources arranged on the first substrates are connected in series and conducted to the connectors provided on the first substrates. The connectors on the first substrates are connected in parallel.

7. The irradiation device according to claim 2, characterized in that Couplers are installed at the front and rear of the driving mechanism, and a plurality of driving mechanisms are connected via the couplers.

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