JP3200968B2 - UV irradiation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an ultraviolet irradiation device.

[0002]

2. Description of the Related Art In recent years, it has been widely practiced to apply a UV-curing paint or ink to the surface of glass, metal, paper or plastic, and to cure the paint or ink on the work surface with a UV-curing light source. I have. As shown in FIGS. 4 and 5, a conventional ultraviolet irradiation apparatus includes an irradiator 1 having an interval of about 50 cm above a conveyor, for example.
And a reflector 2 and a straight tube-type ultraviolet curing light source 3 are mounted inside the irradiator 1. Further, the lower part of the irradiator 1 is opened during ultraviolet curing, and is opened during non-curing. A closing shutter 4 is provided and configured. As shown in FIG. 4, the shutter 4 is divided into two parts, for example, at the center in the longitudinal direction, is symmetrical, and is configured to rotate.

[0003]

According to the ultraviolet curing apparatus described above, the shutter is divided into two parts, so that the opening and closing operation is quick, but the gap between the joint parts of the two parts when the shutter is closed when closed. Has the disadvantage that ultraviolet light leaks from The outer wall temperature near the center of the shutter is 6k
When the high pressure discharge lamp of w is installed inside the irradiator, about 30
There is a disadvantage that the temperature becomes high at 0 ° C., the shutter is deformed, and the shutter cannot be opened and closed smoothly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to keep the outer wall temperature of a shutter portion low, prevent ultraviolet rays from leaking from a joint portion of the shutter portion, and to quickly open and close the shutter. It is an object of the present invention to provide an ultraviolet curing device that can be used for the following.

The present invention has the following configuration in order to solve the above problems. That is, a shutter is freely openable and closable on the lower surface of the irradiator body having a reflector and an ultraviolet light source mounted inside. The shutter is divided at the center in the longitudinal direction so as to open outward, and the divided shutter is configured to move back and forth between the outer plate and the partition plate of the irradiator body. The shutter is provided with a heat shield plate inside, and a shutter outer plate is provided outside the heat shield plate with an interval between the heat shield plate, and when the shutter is closed, the cooling air is supplied to the irradiator. The space between the outer plate and the partition plate of the main body passes through the inner surface of the heat shield plate and passes through the inside of the reflector. Further, the heat shield plate and the shutter outer plate have a structure capable of absorbing distortion due to expansion, and the divided shutter is configured such that when closed, both the heat shield plate and the shutter outer plate overlap at the joint.

[0006]

According to the ultraviolet irradiation apparatus having the above-mentioned structure, the shutter is formed with a space between the heat shield plate and the shutter outer plate, so that the temperature of the outer wall of the shutter can be kept low. Also, since the heat shield plate and the shutter outer plate are configured to overlap, no ultraviolet light leaks from the joint of the shutter, and the expansion between the heat shield plate and the shutter outer plate is absorbed, Since the shutter is reliably opened and closed without distortion, and as shown in FIG. 2, the divided shutter is configured to move back and forth between the outer plate and the partition plate of the irradiator body. When the shutter is closed, the cooling air flows effectively on the inner surface of the heat shield plate, so that it is possible to prevent the shutter from becoming hot and deformed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In the figure, reference numeral 11 denotes a box-shaped irradiator body, which has an outer plate 21 and a partition plate 22. Reference numeral 12 denotes a reflector mounted inside the irradiator body 11, which is provided with a hole 13 at the top. 14
Is an ultraviolet light source mounted and mounted inside the reflector 12, and is constituted by using, for example, a 6 kW high-pressure discharge lamp. Reference numeral 15 denotes a guide for controlling the wind, which is arranged on both sides inside the lower part of the irradiator body 11.

A shutter 16 is provided on the lower surface of the irradiator body 11 so as to be openable and closable. The same shutter 16
Is divided at the center in the longitudinal direction and is symmetrical, and the divided shutter is configured to move back and forth between the outer plate and the partition plate of the irradiator body. When the shutter thus divided moves back and forth between the outer plate and the partition plate of the irradiator body, when the shutter is closed, the cooling air flows when the shutter is closed, as shown in FIG. Since the water flows through the inside of the reflector from between the outer plate and the partition plate through the inner surface of the heat shield plate, the temperature of the shutter becomes high and the shutter is not deformed. 17 is a heat shield plate constituting a shutter,
For example, it is constituted by an iron plate. Reference numeral 18 denotes a shutter outer plate which is disposed with a space between the shutter and the heat shield plate 17, and is made of, for example, stainless steel. 19 is a support pin for supporting the heat shield plate 17 and the shutter outer plate 18. Further, the heat shield plate 17 is provided with an elongated hole 20 so that when the heat shield plate 17 and the shutter outer plate 18 expand due to high heat, the distortion generated between them is absorbed.

In the above-described ultraviolet irradiation apparatus, when curing with an ultraviolet light source, for example, glass,
A work in which paint or ink for UV curing is applied to the surface of metal, paper, or plastic is conveyed, and as shown in FIG. 1, the shutter is opened symmetrically and irradiated with UV light for about 0.5 seconds. . During this ultraviolet curing, air is sucked in by the blower, and the ultraviolet light source and the reflector are cooled.

In the non-curing state, the two divided shutters are closed as shown in FIG. 2 with the ultraviolet light source turned on. During this non-curing time, air is sucked in by the blower, and the ultraviolet light source and the reflector are cooled. The shutter is
The cooling air also passes between the heat shield plate and the shutter outer plate, is cooled and the outer wall temperature of the shutter outer plate can be suppressed to about 50 ° C., and the shutter does not deform due to high heat.
In addition, since the heat shield plate and the shutter outer plate are superposed at the center, ultraviolet rays do not leak from the joint portion of the shutter. Further, since the expansion of the heat shield plate and the shutter outer plate is absorbed, no distortion occurs and the shutter cannot be opened and closed.

[0011]

As described above, according to the present invention, since the shutter is configured to have a space between the heat shield plate and the shutter outer plate, the temperature of the outer wall of the shutter can be kept low, and the deformation of the shutter can be reduced. And opening and closing can be performed reliably. In addition, since both heat shield plates and the shutter outer plate are polymerized when not cured, ultraviolet rays do not leak from the joint of the shutter, and furthermore, the heat shield plate and the shutter outer plate absorb the expansion, so distortion occurs. There is no. Furthermore, since the divided shutter moves back and forth between the outer plate of the irradiator body and the partition plate, when the shutter is closed, cooling air flows on the inner surface of the heat shield plate and the shutter becomes hot and does not deform effective.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an ultraviolet irradiation device of the present invention at the time of ultraviolet curing.

FIG. 2 is a sectional view of the ultraviolet irradiation device of the present invention when it is not cured.

FIG. 3 is a partially enlarged sectional view of FIG. 1;

FIG. 4 is a cross-sectional view of a conventional ultraviolet irradiation device during ultraviolet curing.

FIG. 5 is a cross-sectional view of a conventional ultraviolet irradiation device when it is not cured.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Irradiator main body 12 Reflector 13 Hole 14 Ultraviolet light source 15 Guide 16 Shutter 17 Heat shield plate 18 Shutter outer plate 19 Support pin 20 Slot

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B41F 23/04 H01J 61/52 F21V 11/00-11/18

Claims (1)

(57) [Claims] 1. An ultraviolet irradiation apparatus comprising a illuminator body having a reflector and an ultraviolet light source mounted on the inside thereof, wherein the shutter is openably and closably disposed on a lower surface of the irradiator body. The shutter is divided so as to move forward and backward between the outer plate and the partition plate of the irradiator body, and the shutter is provided with a heat shield plate inside, and the heat shield is provided. A shutter outer plate is provided outside the plate with a space between it and the heat shield plate, and when the shutter is closed, cooling air flows inside the heat shield plate from between the outer plate of the irradiator body and the partition plate. It passes through the surface and passes through the interior of the reflector.The heat shield plate and the shutter outer plate have a structure that can absorb the distortion caused by expansion.The divided shutters are both joined at the joint when closed. Make sure that the heat shield plate and shutter outer plate overlap. Ultraviolet irradiation apparatus, characterized in that the.