JPH08267596A - UV irradiation device - Google Patents

Abstract

PURPOSE: To uniformly irradiate a surface to be irradiated with ultraviolet rays by revolving a pair of reflectors around the support shaft in the vicinity of the wall surface of an irradiator and constituting them so that the leading ends of both reflectors overlap partially with each other when the reflectors are closed. CONSTITUTION: The reflectors 2, 3 mounted in an irradiator main body 1 have a semicircular arc shape and are supported in a left and right symmetric state along the inner wall surface in the longitudinal direction of the irradiator main body 1. For example, the reflectors 2, 3 are constituted of an aluminum material and the length of them is set to about 750-1400mm. Further, the reflectors 2, 3 are constituted so that the leading end parts overlap slightly with each other when they are closed. In such a state that the reflectors 2, 3 are opened, the ultraviolet curable paint or ink on the surface of paper or plastic is cured by the ultraviolet rays from an ultraviolet source. When a rotary actuator is reversely rotated, the reflectors 2, 3 are closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of 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, a commonly used ultraviolet irradiation device is configured by disposing a reflector inside the irradiation device main body having an opening on the lower surface, and by mounting an ultraviolet light source inside the reflector, When curing the UV-curable paint or UV-curable ink, the cover placed at the front of the UV light source is kept open, and when it is not cured, the front of the UV light source is covered with the cover. There is. In this way, the front part of the UV light source is covered with a cover during non-curing, and the cover is opened during curing. This is because it takes time.

[0003]

By the way, in recent years, for example, it is required to arrange an ultraviolet irradiation device in a narrow space of a printing machine. According to the above-mentioned structure, the ultraviolet irradiation device is constructed in a small size. However, there is a drawback that it is difficult to place it in a narrow place. In addition, if the reflector plate has a length of, for example, 1000 mm or more, when the reflector plate is opened and closed on one side, the reflector plate is twisted and the intensity of ultraviolet rays becomes uneven on the irradiated surface.

The present invention has been made in view of the above points, and the ultraviolet irradiation device can be constructed in a small size, the reflector can be opened and closed surely, and the irradiation surface can be made uniform. An object of the present invention is to provide an ultraviolet irradiation device that can irradiate ultraviolet rays.

[0005]

The present invention has the following constitution in order to solve the above problems. That is, the invention according to claim 1 is such that a fixed reflection plate is provided on the inner upper surface of a horizontally long irradiation device body having an opened lower surface, and an arc shape is formed on the inner side surface in the longitudinal direction of the irradiation device body. A pair of horizontally long reflectors are arranged symmetrically on the left and right sides. In addition, a long ultraviolet light source is installed at the center of the inside of the same pair of reflectors,
In addition, the pair of reflectors are each configured to support a shaft in the vicinity of the wall surface inside the irradiation apparatus main body, and to rotate the pair of reflectors with the support shaft as a fulcrum. When the reflectors are opened, the pair of reflectors are located near the inner wall of the irradiation device body, and when the reflectors are closed, the tips of the two reflectors overlap each other.

According to a second aspect of the present invention, a fixed reflecting plate is provided on the inner upper surface of the oblong irradiation device main body having an opened lower surface, and an arcuate shape is formed on the inner side surface in the longitudinal direction of the irradiation device main body. In addition, a pair of horizontally elongated reflectors are arranged symmetrically to each other, and a long ultraviolet light source is mounted at the center of the inside of the pair of reflectors. Further, a reflector driving mechanism is arranged at both ends inside the irradiation apparatus main body, and a pair of reflectors are simultaneously driven at both ends.

[0007]

According to the ultraviolet irradiating device having the structure described in claim 1, the reflector is constructed so as to be opened and closed by the driving mechanism provided at both ends, so that the ultraviolet irradiating device can be constructed in a small size. In addition, the reflector can be opened and closed surely. Further, it is possible to irradiate the surface to be irradiated with uniform ultraviolet rays.

According to the ultraviolet irradiating device of the second aspect, the pair of reflectors are rotated about a support shaft near the inner wall of the irradiating device main body as a fulcrum, and when the reflectors are opened, the reflector is irradiated. It is located near the inner wall of the main body of the device, and when the reflectors are closed, the tips of both reflectors overlap each other, and the movement of the reflectors may be minimal, and the device can be constructed in a small size. Can be reliably opened and closed, and uniform ultraviolet rays can be irradiated on the surface to be irradiated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The ultraviolet irradiation apparatus of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a horizontally long irradiation device main body having an opened lower surface, which is made of, for example, an iron material. The length of the irradiation apparatus main body 1 is, for example, 1000
It is configured to have a size of about mm to 2000 mm. Reference numerals 2 and 3 denote reflectors mounted inside the irradiation apparatus main body 1, which are formed in a semi-arcuate shape and are supported symmetrically along the longitudinal inner wall surface of the irradiation apparatus main body 1.
The reflectors 2 and 3 are made of, for example, an aluminum material,
The length is, for example, about 750 mm to 1400 mm. Further, the reflectors 2 and 3 are configured such that their tip portions slightly overlap each other when they are closed.

Reference numeral 4 denotes a rod-shaped rack arranged near the end of the reflector in the longitudinal direction and between the two reflectors 2 and 3, and is configured to move up and down. . Reference numeral 5 is a drive gear for moving the drive rack 4 up and down, and 6 is a drive mechanism for driving the drive gear 5, which is constituted by using, for example, a rotary actuator. A motor may be used instead of the rotary actuator. Reference numeral 7 is a shaft connected to a rotary actuator. Reference numeral 8 denotes a fixed reflection plate mounted inside the irradiation apparatus main body 1.

When air is sent to the rotary actuator by the above-mentioned ultraviolet irradiation device, the shaft 7 rotates and the drive gear 5 operates, so that the drive rack 4 moves up and down. Further, the force of the drive rack 4 rotates the reflection plates 2 and 3 via the gear with a shaft.

With the reflectors 2 and 3 open, the UV-curable coating material or UV-curable ink on the surface of paper or plastic is cured by UV rays from the UV light source. When the rotary actuator is rotated in the reverse direction, the reflection plates 2 and 3 are closed. Temporary reflectors 2 and 3
When is closed, the ultraviolet light source is dimmed by about 70%, and when the paint or ink is cured again, the curing work is immediately advanced.

[0013]

As described above, according to the present invention as set forth in claim 1, since the reflector is constructed so as to be opened and closed by the driving mechanism provided at both ends, the reflector may be twisted. It has a unique effect that the reflector can be surely opened and closed and that the surface to be irradiated can be uniformly irradiated with ultraviolet rays.

According to the second aspect of the present invention, the pair of reflectors are rotated about a support shaft near the inner wall of the irradiation device main body as a fulcrum, and when the reflectors are opened, the reflector is the inner wall of the irradiation device main body. Since the reflectors are located in the vicinity and the tips of the reflectors partially overlap each other when the reflectors are closed, the movement of the reflectors may be minimal, which has a unique effect that the device can be configured in a small size. Further, since the reflector can be opened and closed with certainty, it is possible to irradiate the surface to be irradiated with ultraviolet rays uniformly.

[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.

[Explanation of symbols]

 1 Irradiator main body 2,3 Reflector 4 Rod-shaped rack 5 Drive gear 6 Drive mechanism 7 Shaft 8 Fixed reflector

Claims (2)

[Claims] 1. A fixed reflection plate is provided on the inner upper surface of a horizontally elongated irradiation apparatus body having an opening on the lower surface, and a pair of arc-shaped and horizontally elongated shapes is provided on an inner side surface in the longitudinal direction of the irradiation apparatus body. The reflectors are arranged symmetrically, and a long ultraviolet light source is mounted at the center of the inside of the same pair of reflectors. The pair of reflectors are located near the wall inside the irradiation device body. And a pair of reflectors are rotated around the support axis, and when the reflectors are opened, the pair of reflectors are located near the inner wall of the irradiation device body, and when the reflectors are closed, both reflections An ultraviolet irradiating device, characterized in that part of the tips of the body overlap. 2. A fixed reflecting plate is provided on the inner upper surface of a horizontally long irradiation device body having an opening on the lower surface, and a pair of arc-shaped and horizontally long irradiation is provided on the inner side surface in the longitudinal direction of the irradiation device body. The reflectors are arranged symmetrically, a long UV light source is mounted at the center of the inside of the same pair of reflectors, and a reflector driving mechanism is arranged at both inner ends of the irradiation device body. The ultraviolet irradiation device is characterized in that the reflectors of (1) and (2) are simultaneously driven at both ends.