JPH07256190A - UV irradiation device - Google Patents

Abstract

(57) [Abstract] [Purpose] Even when the irradiation opening 34 is closed, the lamp 11 and the reflector 12 are efficiently cooled. [Structure] An air passage 66 communicating with the side air passage 46 is formed between the opening side reflection plate 32 and the guide body 64. The guide body 64 is rotatably supported with the end facing the side air passage 46 as a fulcrum. The pair of opening-side reflectors 32 are rotated to an irradiation position where the irradiation opening 34 opens and a closing position where the irradiation opening 34 closes. [Effect] The opening side reflection plate 32 can be cooled even when the irradiation opening 34 is closed by sending air from the side ventilation path 46 to the ventilation path 66.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet irradiation device for selectively irradiating an object to be irradiated with ultraviolet rays.

[0002]

2. Description of the Related Art Conventionally, an ultraviolet irradiation device irradiates ultraviolet rays on an object to be irradiated such as an ultraviolet curable ink, paint, adhesive or the like applied to a substrate such as newsprint or printed plywood,
The object to be irradiated is cured and dried, and has a structure including a lamp and a reflector that includes the lamp and is open in the irradiation direction.

In such an ultraviolet irradiator, when it is necessary to selectively irradiate ultraviolet rays, once the lamp is turned off, it takes time for the lamp to be turned on again and the lighting state to stabilize. The structure is such that the irradiation opening is selectively opened and closed while the lighting state is maintained.

An ultraviolet irradiating device for selectively irradiating ultraviolet light is, for example, as disclosed in Japanese Patent Laid-Open No. 2-79306, the left and right reflectors of a reflector are fulcrumed at the center of each reflector. As the upper and lower sides of the left and right reflecting plates are moved away from each other and the lower ends are moved closer to each other, the irradiation opening is closed to block the irradiation of ultraviolet rays. Also, in this ultraviolet irradiation device, a cooling structure is adopted in order to generate high heat in the lamp, an exhaust port is provided on the top of the reflector, and the lamp and the reflector are cooled by cooling air sucked through the irradiation opening. ing.

[0005]

However, in the conventional ultraviolet irradiation device, when the irradiation openings are closed by the left and right reflecting plates of the reflector, the cooling air is not sucked from the irradiation openings of the reflector, so that the cooling efficiency is improved. It becomes worse and the temperature of the lamp and reflector tends to rise. Therefore, when the reflectors on the left and right of the reflector are opened for irradiation, the radiant heat of the lamp or the reflector is radiated to the object to be irradiated, which causes a thermal effect on the object to be irradiated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an ultraviolet irradiation device capable of efficiently cooling a lamp or a reflector even when the irradiation opening is closed.

[0007]

The invention according to claim 1 is
A lamp, an irradiation opening is provided in the irradiation direction by enclosing the lamp, and a reflector comprising a top side reflection plate and a pair of opening side reflection plates arranged on the irradiation opening side of the top side reflection plate, and A side air passage that is communicated between the top-side reflector and the opening-side reflector, and a guide body that forms an air passage that communicates with the side-air passage between the outer surface of the opening-side reflector and the outer surface of the opening-side reflector. The guide body is rotatably supported with an end facing the side air passage as a fulcrum, and the pair of aperture side reflection plates are pivoted between an irradiation position where the irradiation opening is opened and a closed position where the irradiation opening is closed. And a rotating mechanism for rotating the same.

According to a second aspect of the present invention, in the first aspect of the invention, there is provided a ventilation guide plate for guiding the ventilation from the side ventilation passage to the ventilation passage between the opening side reflection plate and the guide body. is there.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described, provided on the pair of aperture-side reflectors,
A blower port of the side blower path is formed between the top reflector and the closing part that closes the blower port when the opening side reflector is rotated to the closed position.

The invention according to claim 4 is the invention according to claims 1 to 3.
In any one of the inventions described above, the pair of aperture-side reflectors are provided at their tips with engaging portions that engage with each other when the aperture-side reflectors are rotated to the closed position.

The invention according to a fifth aspect is the first to the fourth aspects.
In any one of the inventions described above, a gap is formed between the tips of the pair of guide bodies when the pair of aperture-side reflectors are rotated to the closed position.

[0012]

According to the first aspect of the present invention, at the time of irradiation of ultraviolet rays, the pair of opening side reflection plates are rotated to the irradiation position by the rotating mechanism to open the irradiation opening, and the ultraviolet rays emitted from the lamp are directly or reflected. It is reflected by the body and is irradiated to the irradiation target through the irradiation opening. Further, when the ultraviolet rays are not irradiated, the pair of opening side reflection plates are rotated to the closed position by the rotating mechanism to close the irradiation opening, and the ultraviolet rays emitted from the lamp are not irradiated.

Air is blown into the inside of the reflector through the side air passage to cool the lamp and the reflector. A part of the air is blown into the ventilation passage between the opening side reflection plate and the guide body from the side air passage, and the opening side reflection plate is cooled from the back surface side.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the invention, since the ventilation guide plate is provided, the air sent from the side air passage is between the opening side reflection plate and the guide body. Is well guided to the ventilation passage of, and the opening side reflection plate is efficiently cooled.

According to the invention of claim 3, in addition to the operation of the invention of claim 1 or 2, when the pair of aperture-side reflectors are rotated to the closed position, a blower port between the top-side reflectors is provided. Since the cooling air is closed by the closing portion, all the cooling air sent from the side air passages flows into the air passages, and the opening side reflection plate is efficiently cooled.

According to the invention of claim 4, in addition to the operation of the invention of any one of claims 1 to 3, the tip of the pair of aperture-side reflectors is rotated to the closed position of the aperture-side reflector. Since the engaging portion that engages with each other is provided, the closed state of the irradiation opening is maintained.

According to the invention described in claim 5, in addition to the operation of the invention described in any one of claims 1 to 4, even when the pair of opening side reflection plates are closed and closed, the distance between the tips of the pair of guide bodies is increased. Since a gap is formed in the air passage, the exhaust resistance of the air sent from the side air passage to the air passage is small, the air flows well from the side air passage to the air passage, and the aperture side reflection plate is cooled efficiently. It

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of one embodiment of the ultraviolet irradiation apparatus of the present invention will be described below with reference to FIGS.

The ultraviolet irradiating device comprises a lamp 11, a reflector 12 inward of the lamp 11, and a body 13 to which the lamp 11 and the reflector 12 are attached.

The lamp 11 comprises a straight tube type metal halald lamp having terminals 21 at both ends, a high pressure mercury lamp, etc., and the terminals 21 at both ends are mounted in a lamp socket 22 and supported by the body 13. There is.

The reflector 12 is formed over substantially the entire length of the light emitting portion 11a in the longitudinal direction of the lamp 11,
A pair of top-side reflectors 31 and a pair of aperture-side reflectors 32 each made of a curved aluminum plate or the like are provided separately on both sides of 11 so as to be divided. Inside the reflector 12, the lamp 11
The internal space 33 is formed, and the irradiation opening 34 is formed between the tips of the pair of opening-side reflecting plates 32.

Further, the machine body 13 is formed in a frame shape which is long in the longitudinal direction of the lamp 11, and a case portion 41 is formed so as to project downward at substantially the center thereof. The case portion 41 is formed in a frame shape that opens downward, and the support plate 42 is provided between the side plates 41a of the case portion 41.
Is installed on the lower surface of the support plate 42, and the light emitting portion of the lamp 11 is
A pair of cylindrical bodies 43 extending over substantially the entire length of 11a in the longitudinal direction are attached.

Between the pair of cylinders 43, a top air passage 45 communicating with an upper air passage 44 is formed, and each cylinder 43 and the case portion 41.
Side air passages 46 communicating with the air passages 44 are formed between the side plates 41a and the bottom plate 41b.

Top side reflecting plates 31 are attached to the lower portions of the respective cylinders 43, and a blower opening 47 is formed between the pair of top side reflecting plates 31 to connect the top blowing path 45 and the internal space 33. An air outlet 48 that connects the side air passage 46 and the internal space 33 between the end of each top reflector 31 and the bottom plate 41b of the case 41.
Is formed with an opening.

An exhaust passage 49 is formed in each cylinder 43, and an exhaust outlet 50 is formed in the vicinity of the top of each top reflector 31 so that the exhaust passage 49 communicates with the internal space 33. .

On one end side of the machine body 13, a ventilation duct 51 communicating with the ventilation passage 44 and an exhaust duct 52 communicating with the exhaust passage 49 are attached. The air duct 51 is connected to an air blower (not shown), and the air exhaust duct 52 is connected to an air blower (not shown).

A support shaft 62 whose both ends are rotatably supported by support members 61 attached to the lower surface of the machine body 13 is provided on both lower sides of the bottom plate 41b of the case portion 41 along the longitudinal direction of the lamp 11. The upper end portion of the guide body 64 is attached to the support shaft 62 via attachment members 63 having a substantially hexagonal shape and attached at a plurality of positions. The guide body 64 is formed to have substantially the same shape as the opening-side reflection plate 32, and the opening-side reflection plate 32 is attached via spacers 65 arranged at a plurality of positions. An air passage 66 is formed between the guide body 64 and the opening side reflection plate 32.

The bottom plate 41b of the case portion 41 is formed with a blower opening 67, and the side blower passages 46 through the blower opening 67 are formed.
The air blown through the opening side reflector 32 and the guide body 64
A ventilation guide plate 69 that forms a ventilation space 68 that leads to the ventilation path 66 between and is attached.

A rotating mechanism 71 for rotating the pair of opening-side reflecting plates 32 is attached to the lower surface of the other end of the machine body 13. The rotating mechanism 71 includes a motor 72, and a rotating shaft 73 of the motor 72.
And the support shafts 62 are connected to each other via a gear mechanism 74. The gear mechanism 74 allows the support shafts 62 to rotate in opposite directions with respect to the rotation of the motor 72. Then, the forward or reverse rotation of the motor 72 opens the gap between the tips of the pair of opening-side reflecting plates 32 via the guide bodies 64, and the irradiation opening 34 is formed.
Is rotated to an irradiation position (the position shown in FIG. 1) where the opening is opened, and a closed position (the position shown in FIG. 2) where the ends of the pair of opening side reflection plates 32 are closed and the irradiation opening 34 is closed. Has been done.

When the pair of aperture-side reflectors 32 are rotated to the closed position, the tip of one aperture-side reflector 32 is engaged with the outside of the tip of the other aperture-side reflector 32. Is formed with the engaging portion 32a. In addition, a pair of aperture side reflection plates 32
When is rotated to the closed position, a gap 75 is formed between the tips of the pair of guide bodies 64.

A conveyor (not shown) that conveys the object to be irradiated is disposed below the ultraviolet irradiation device.

Next, the operation of this embodiment will be described.

At the time of irradiation of ultraviolet rays, as shown in FIG. 1, the pair of opening side reflection plates 32 are rotated by the rotating mechanism 71 to the irradiation position, and the irradiation opening 34 is opened. Therefore, the lamp
The ultraviolet light emitted from 11 is directly or reflected by the reflector 12 and is applied to the object to be irradiated on the conveyor through the irradiation opening 34.

In the operating state of the air blower and the air blower, the cooling air blown into the air blow passage 44 is guided to the internal space 33 through the top air blow passage 45 and is guided to the upper space of the lamp 11 or the top of the reflector 12. The side is cooled and guided to the left and right sides of the internal space 33 through the side air passage 46 to cool the lower side of the lamp 11 and the top side reflection plate 31 from the front side. Also, the internal space
33 warm air is exhausted to the exhaust path 49 through the exhaust port 50.

Further, the cooling air sent from the side air passage 46 into the ventilation space 68 through the air outlet 67 is reflected by the opening side reflection plate.
It flows into the ventilation passage 66 between the 32 and the guide body 64, and the opening side reflection plate
Cool 32 from the back side.

Therefore, the top side reflection plate 31 and the opening side reflection plate 32 of the lamp 11 and the reflector 12 can be efficiently cooled, the temperature of the lamp 11 and the reflector 12 does not rise, and the lamp 11 and the reflector 12 can be cooled. It is possible to prevent radiant heat from exerting a thermal influence on an object to be irradiated.

On the other hand, when the ultraviolet rays are not irradiated, as shown in FIG.
Is rotated to the closed position, the engaging portions 32a at the tips of the pair of opening side reflection plates 32 are engaged, and the irradiation opening 34 is closed. Therefore, the ultraviolet rays emitted from the lamp 11 are not emitted toward the conveyor.

Then, the cooling air sent to the air blow passage 44 is guided to the inner space 33 through the top air blow passage 45 and the lamp
Cool the top side of 11 and the top side of reflector 12 and
It is guided to both the left and right sides of the inner space 33 through the to cool the lower side of the lamp 11, the top side reflection plate 31 and the opening side reflection plate 32 from the surface side. In addition, the warm air in the inner space 33 is the exhaust port.
The air is exhausted to the air exhaust passage 49 through 50.

Further, the cooling air sent from the side air passage 46 into the ventilation space 68 through the air outlet 67 is used as the opening side reflection plate.
It flows into the ventilation passage 66 between the 32 and the guide body 64, and the opening side reflection plate
After cooling 32 from the back surface side, it is exhausted to the outside through the gap portion 75 between the tips of the pair of opening side reflection plates 32.

Therefore, even when the pair of aperture-side reflectors 32 are closed and the irradiation aperture 34 is closed, the lamp 11 and the reflector 12 are closed.
It is possible to efficiently cool the top side reflection plate 31 and the opening side reflection plate 32, and prevent the lamp 11 and the reflector 12 from being heated to a high temperature.

Therefore, when irradiation is performed by rotating the pair of opening side reflection plates 32 having the closed position to the open position, the lamp is
It is possible to prevent radiant heat from the reflector 11 and the reflector 12 from exerting a thermal influence on the object to be irradiated.

Further, since the ventilation guide plate 69 is provided, the air blown from the side air passage 46 through the air outlet 67 can be well guided to the air passage 66 between the opening side reflection plate 32 and the guide body 64. You can

Further, since the pair of opening side reflecting plates 32 are provided with the engaging portions 32a which engage with each other when the opening side reflecting plates 32 are rotated to the closed position, the closed state of the irradiation opening 34 can be maintained. .

Even when the pair of opening-side reflecting plates 32 are closed and closed, a gap 75 is formed between the tips of the pair of guide members 64, so that the air flows from the side air passage 46 into the air passage 66. Exhaust resistance of the air that has cooled the opening side reflector 32 is low,
Air satisfactorily flows from the side air passage 46 into the air passage 66.

Next, FIGS. 4 and 5 show another embodiment of the present invention. In this embodiment, a side air passage is provided at the upper end of each aperture side reflection plate 32 and between the top side reflection plate 31. A blower port 48 communicating with 46 is formed, and a closing portion 81 that closes the blower port 48 when the opening side reflection plate 32 is rotated to the closed position is integrally formed.

At the time of irradiation of ultraviolet rays, as shown in FIG. 4, with the pair of opening side reflecting plates 32 being rotated to the irradiation position and the irradiation opening 34 being opened, the top side reflecting plate 31 and the opening side. Since the blower port 48 is opened between the reflection plate 32 and the closed portion 81, the cooling air fed from the side air passage 46 is blown out.
Flows to both the internal space 33 and the ventilation passage 66 through the air outlet 48 and the air outlet 67.

Further, when the ultraviolet ray is not irradiated, as shown in FIG. 5, the opening side reflection plate 32 is closed while the pair of opening side reflection plates 32 is rotated to the closed position to close the irradiation opening 34. Since the portion 81 approaches the top side reflection plate 31 and the lower surface of the cylindrical body 43 to close the blower port 48, the cooling air fed from the side blower passage 46 flows only to the blower passage 66 through only the blower opening 67. Therefore, all the cooling air sent to the side air passages 46 flows to the air passages 66, and the opening side reflection plate 32 is efficiently cooled.

[0048]

According to the first aspect of the invention, an air passage communicating with the side air passage is formed between the opening side reflection plate and the guide body supporting the opening side reflection plate, and the guide body of the guide body is formed. The pair of aperture-side reflectors are rotatably supported with the end facing the side air passage as a fulcrum, and the pair of aperture-side reflectors are pivoted between an irradiation position where the irradiation opening opens and a closing position where the irradiation opening closes. Even in the closed state, the air can be sent from the side air passage to the air passage to cool the opening side reflection plate, and the lamp and the reflector can be efficiently cooled.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the ventilation guide plate is provided, the air fed from the side air passages is fed to the opening side reflection plate and the guide body. It is possible to satisfactorily guide the air flow path between the openings, and it is possible to efficiently cool the opening side reflection plate.

According to the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, when the pair of aperture side reflectors are rotated to the closed position, the gap between the pair of aperture side reflectors and the top side reflector is increased. Since the blowing port is closed by the closing portion, all the cooling air sent from the side blowing passage flows into the ventilation passage, and the opening-side reflecting plate can be efficiently cooled.

According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the tip of the pair of aperture-side reflectors is rotated to the closed position of the aperture-side reflector. Since the engaging portions that engage with each other during movement are provided, the closed state of the irradiation opening can be maintained.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, even when the pair of opening side reflection plates are closed and closed, Since a gap is formed between the tips, the exhaust resistance of the air sent from the side air passage to the air passage is low, the air flows well from the side air passage to the air passage, and the opening side reflection plate is efficiently Can be cooled.

[Brief description of drawings]

FIG. 1 is a sectional view at the time of irradiation showing an embodiment of an ultraviolet irradiation device of the present invention.

FIG. 2 is a sectional view of the above-described embodiment during standby.

FIG. 3 is a side view in which a part of the above embodiment is omitted.

FIG. 4 is a sectional view at the time of irradiation showing another embodiment of the present invention.

FIG. 5 is a sectional view of the above-described embodiment during standby.

[Explanation of symbols]

 11 Lamp 12 Reflector 31 Top reflector 32 Open side reflector 32a Engaging portion 34 Irradiation opening 46 Side air passage 48 Air outlet 64 Guide body 66 Air passage 69 Air guide plate 71 Rotation mechanism 75 Gap 81 Closure

Claims (5)

[Claims] 1. A lamp, and an irradiation opening provided in the irradiation direction by enclosing the lamp,
A reflector consisting of a top-side reflector and a pair of aperture-side reflectors arranged on the irradiation opening side of the top-side reflector, and a side portion that is in communication between the top-side reflector and the aperture-side reflector. A guide body that forms an air passage that communicates with the side air passage between the air passage and the outer surface of the opening-side reflector, and is rotatable about an end of the guide body that faces the side air passage as a fulcrum. And a rotation mechanism that rotates the pair of opening-side reflectors to an irradiation position where the irradiation opening opens and a closed position where the irradiation opening closes. 2. The ultraviolet irradiation device according to claim 1, further comprising a ventilation guide plate that guides the air blown from the side ventilation passage to the ventilation passage between the opening side reflection plate and the guide body. 3. A pair of aperture-side reflectors are provided to form a vent for the side air passage between the top-side reflector and the vents when the aperture-side reflector is rotated to the closed position. 3. A closing portion for closing the opening is provided.
The ultraviolet irradiation device described. 4. The pair of opening-side reflecting plates are provided at their tips with engaging portions that engage with each other when the opening-side reflecting plates are rotated to the closed position. 1. The ultraviolet irradiation device according to 1. 5. The ultraviolet ray according to claim 1, wherein a gap is formed between the tips of the pair of guide bodies when the pair of opening-side reflecting plates are rotated to the closed position. Irradiation device.