JPH0943399A - UV irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultraviolet ray irradiation device which is constituted into a small size and efficiently irradiates the ultraviolet ray on an object to be irradiated. SOLUTION: An ultraviolet ray irradiation device is so constituted that a long light source 12 is mounted in the inside of an ultraviolet ray irradiation device, an elliptical upper reflection plate 13 is provided on the upper part of the light source, and elliptical side reflection plates 14 are arranged on its both sides, the upper reflection plate 13 and the side reflection plates 14 have the same focus, and the reflection light of the end of the upper reflection plate 13 is hardly reflected to the outside of the ends of the both side reflection plates 14.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an improvement in an ultraviolet irradiation device.

[0002]

2. Description of the Related Art Conventionally, it has been practiced to coat a surface of paper, plastic or the like with an ultraviolet curable coating material or an ultraviolet curable ink and cure the ultraviolet curable coating material or the ultraviolet curable ink with an ultraviolet irradiation lamp. By the way, as shown in FIG. 4, in a generally used ultraviolet irradiation device, a reflector 2 having a parabolic cross section is arranged inside the irradiation device main body 1 whose lower surface is opened, and the same reflection is performed. The ultraviolet light source 3 is mounted inside the body 2, and when the ultraviolet curable coating material or the ultraviolet curable ink is cured, the cover disposed at the front of the ultraviolet light source is opened, Further, at the time of non-curing, the front part of the ultraviolet light source is covered with a cover. In this way, the front part of the ultraviolet light source is covered with the cover during non-curing, the cover is opened during curing, and the light source is not turned off when the light source is turned off once,
This is because it takes several minutes for the UV output to stabilize.

[0003]

By the way, in recent years, for example, there is a demand for an ultraviolet irradiating device in which an ultraviolet irradiating device is arranged in a narrow space of a printing machine and which can efficiently irradiate an object to be irradiated with ultraviolet light. However, according to the above-mentioned ultraviolet irradiation device, there is a drawback that the irradiation target cannot be efficiently irradiated with ultraviolet light.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an ultraviolet irradiation device which is compact in size and which can efficiently irradiate an object with ultraviolet light. And

[0005]

Means for Solving the Problems The present invention has the following structure to solve the above-mentioned problems. That is, in the invention described in claim 1, the elongated light source is mounted inside the elongated ultraviolet irradiation apparatus main body, the elliptical upper reflection plate is provided on the upper side of the light source, and the elliptical shape is formed on both sides. It is configured by arranging side reflectors. The upper reflector and the side reflectors have the same focal point, and the light reflected by the end portions of the upper reflector is not reflected outside the end portions of the side reflectors on both sides.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The ultraviolet irradiation apparatus of the present invention will be described below with reference to FIGS. First, the ultraviolet irradiation device will be described with reference to FIG. In FIG. 1, reference numeral 11 denotes a horizontally long irradiation device main body having an opened lower surface, which is made of, for example, an iron material. The irradiation apparatus main body 11 is configured to have a length of 1500 mm, a horizontal dimension of 100 mm, and a vertical dimension of 150 mm, for example.

Reference numeral 12 designates a main body 11 of a long ultraviolet irradiation device.
It is a long light source mounted in the inside of the, and is configured by using, for example, a high pressure discharge lamp of 1.5 kilowatts. Reference numeral 13 denotes an upper reflecting plate arranged above the light source 12, which is formed in an elliptical shape. Reference numeral 14 is an elliptical side reflector formed by being arranged on both side surfaces of the light source 12. Further, the upper reflector 13 and the side reflector 14 have the same focal point f.
Is configured. Further, the size of the upper reflection plate 13 has a width of 8 when it is attached to the ultraviolet irradiation apparatus main body 11.
The side reflector 14 has a size of 0 mm and a vertical width of 50 mm when mounted on the main body 11 of the ultraviolet irradiation device. Further, as shown in the figure, most of the above-mentioned reflected light from the end of the upper reflector 13 is not reflected to the outside of the ends of the side reflectors 14 on both sides.

A high-pressure discharge lamp of 1.5 kW is mounted on the above-mentioned ultraviolet irradiation device, and the distance from the lower end of the light source to a work conveyed by, for example, a conveyor is 80 mm.
And set it to UV irradiation. When the light source is a water cooling type ultraviolet irradiation device, a light source with a high wattage of about 22.4 kW is stored inside the water cooling jacket.

In FIGS. 2 and 3, reference numeral 15 is a drive shaft for opening and closing the side reflection plate 14, and 16 is a vertically moving cylinder. The plate 14 opens and closes. When the side reflector 14 is closed, the light source is dimmed by about 60%.

[0010]

According to the above-mentioned ultraviolet irradiator, the ultraviolet irradiator can be constructed in a small size and installed in a narrow space, and the reflected light from the side reflectors on both sides is reflected to the outside of the end of the upper reflector. Therefore, it has a special effect that the work can be effectively irradiated with the ultraviolet rays.

[Brief description of drawings]

FIG. 1 is a front view of a part of an ultraviolet irradiation device according to the present invention.

FIG. 2 is a side view of the ultraviolet irradiation device shown in FIG. 1 when a reflector is opened.

FIG. 3 is a side view of the ultraviolet irradiation device of FIG. 1 when a reflector is closed.

FIG. 4 is a front view of a part of a conventional ultraviolet irradiation device.

[Explanation of symbols]

 11 Irradiation Device Main Body 12 Light Source 13 Upper Reflector 14 Side Reflector

Claims (1)

[Claims] 1. An elongated UV light source is mounted inside the elongated UV irradiation device body, an elliptical upper reflector is provided on the upper side of the light source, and elliptical side reflections are provided on both sides. The plate is arranged, the upper reflector and the side reflector have the same focal point,
Further, the ultraviolet irradiation device is characterized in that the reflected light from the ends of the upper reflector is not reflected to the outside of the ends of the side reflectors on both sides.