JP2002292825A - Ultraviolet irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultraviolet irradiation device featuring the easy repair of a light emitter body and a reflective box when their operating failure occurs and the capability of constituting the ultraviolet irradiation device of a comparatively smaller size and further, efficiently curing a paint or an ink. SOLUTION: A light source unit house 20 storing a main reflective mirror 23 is mounted, in a freely attaching/detaching manner, in the body 11 of the ultraviolet irradiation device with an irradiation widow formed on the front. Also a shutter unit 30 storing a freely opening/closing shutter is fitted to the lower side of the light source unit. In addition, an auxiliary reflective mirror 32 concurrently serving as a shutter is arranged so that the light is condensed to a second focal point of the main reflective mirror 23. Besides, the light condensing points of the main reflective mirror 23 and the reflective mirror 32 concurrently serving as the shutter coincide with each other.

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 apparatus incorporated in a printing machine or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a box-shaped irradiator main body 1 is incorporated in a printing machine or the like to carry out an ultraviolet irradiation apparatus.
Inside, the main reflector 2 and the ultraviolet light source 3 are mounted, and at the lower end of the irradiator body 1, a reflector box 5 in which the auxiliary reflector 4 is fixed is fixed. A heat ray cut filter 6 is provided between the reflector box 5 and the heat exchanger to cure the paint or ink on the surface of the work that is transported below the reflector plate box 5. Further, a shutter 7 is provided inside the reflector plate box 5 so as to be freely opened and closed. By providing the shutter 7, when the shutter 7 is closed, the surface of the work 8 is not irradiated with ultraviolet rays. By opening the shutter 7, the paint or ink on the surface of the work 8 is immediately cured with stable ultraviolet rays. It is configured to be able to do.

[0003]

However, according to the above-described ultraviolet irradiation apparatus, the entire ultraviolet irradiation apparatus is taken out of the printing machine regardless of whether the ultraviolet light source 3 is replaced at the end of its life or the reflector plate box 5 is broken. It is necessary to make repairs, and there is a disadvantage that the work becomes complicated. Further, the ultraviolet irradiation device has a disadvantage that it becomes large as a whole. Further, if it is configured to be small, there is a disadvantage that light distribution control is difficult and irradiation efficiency is reduced.

[0004] The present invention has been made in view of the above problems, and does not require removal of the entire ultraviolet irradiation apparatus regardless of whether the irradiator main body or the reflector box fails.
An ultraviolet irradiation device that can be easily repaired by taking out each of them, and the ultraviolet irradiation device can be configured to be relatively small, and by further increasing the light collection rate, paints and inks can be efficiently cured. The purpose is to provide.

[0005]

Means for Solving the Problems The present invention has the following arrangement to solve the above-mentioned problems. That is, the invention according to claim 1 provides a light source unit house in which a main reflecting mirror is housed inside an irradiation device main body having an irradiation window formed on a front surface,
A shutter unit having a shutter that can be freely opened and closed is mounted on the lower side of the light source unit house in a detachable manner. In addition, a shutter / auxiliary reflector is arranged so that light from the light source is focused on the second focal point of the main reflector, and the focal point of the main reflector and that of the shutter / auxiliary reflector are the same. It is.

According to the first aspect of the present invention, when repairing the light source unit or the shutter unit, etc., only the light source unit and the shutter unit to be repaired are taken out of the printing machine without taking out the entire ultraviolet irradiation device. Thus, repair work can be easily performed. In addition, a shutter / auxiliary reflector is arranged so that light from the light source is focused on the second focal point of the main reflector, and the focal points of the main reflector and the shutter / auxiliary reflector are configured to be the same. As a result, the light collection rate is increased, and the paint or ink can be efficiently cured.

According to a second aspect of the present invention, in the ultraviolet irradiating apparatus according to the first aspect, the main reflecting mirror and the shutter / auxiliary reflecting mirror are configured by combining elliptical bodies having different curvatures and have the same light condensing point. It is configured to be.

According to the second aspect of the present invention, the main reflecting mirror and the shutter / auxiliary reflecting mirror combine elliptical bodies having different curvatures to have the same light-collecting point. The paint and ink can be cured well, and the shutter and auxiliary reflector can be made small.

According to a third aspect of the present invention, in the ultraviolet irradiation device according to the first and second aspects, the shutter / auxiliary reflecting mirror is configured by arranging two reflecting mirrors in an inverted C shape. It is.

According to the third aspect of the present invention, a shutter / auxiliary reflecting mirror having a different turning radius can be easily configured.

According to a fourth aspect of the present invention, there is provided an ultraviolet irradiation apparatus according to the first to third aspects, wherein a rotating shaft is disposed at one end of the shutter and auxiliary reflecting mirror, and at an outer end of the rotating shaft, Gears having a plurality of engaging teeth having different rotation radii are alternately arranged, and by combining desired engaging teeth having different rotation radii, the rotation radius of the shutter / auxiliary reflecting mirror can be changed.

According to the fourth aspect of the present invention, the desired engaging teeth having different turning radii are combined to change the interval between the shutter and the auxiliary reflecting mirror with a pair of gears, so that the rotating radius of the shutter and the auxiliary reflecting mirror is changed. Can be changed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 11 denotes a box-shaped irradiation device main body, which is formed with an irradiation window 12 on the front surface in the irradiation direction. Reference numeral 13 denotes an air hole formed on a desired wall surface of the irradiation device main body 11, and 14 denotes an air intake hole formed at an upper end of one end of the irradiation device main body 11, which takes in external cooling air into the inside of the irradiation device main body. . Reference numeral 15 denotes a lid provided on one side surface of the irradiation device main body 11.

Reference numeral 20 denotes a light source unit house, which is formed to have protrusions 21 at the lower ends at both ends in the longitudinal direction. 22
Is a handle provided on a part of the outer wall of the light source unit house 20. Reference numeral 23 denotes a main reflecting mirror fixed inside the light source unit house 20, which is formed using a cold mirror that transmits heat rays and reflects ultraviolet rays. Inside the light source unit house 20, for example, an ultraviolet curing light source of about 3 KW to 12 KW is used. Reference numeral 24 denotes an insulator for connecting a lead wire.

Reference numeral 30 denotes a shutter unit which is detachably attached to the lower side of the light source unit house 20 inside the irradiation device main body 11, and has a projecting piece 31 at the lower end at both ends in the longitudinal direction. It is. Reference numeral 32 denotes a shutter / auxiliary reflector which is arranged to be openable and closable inside the shutter unit 30. The shutter / auxiliary reflector 32 is arranged so that light from the light source is focused on the second focal point of the main reflector. The shutter and the auxiliary reflecting mirror are configured to have the same focusing point.
Further, as shown in FIG. 6, the main reflecting mirror 23 and the shutter / auxiliary reflecting mirror 32 are configured such that two converging ellipsoids having different curvatures have the same light condensing point. That is,
The main reflecting mirror 23 has a semi-elliptical surface and is integrally formed, and the shutter / auxiliary reflecting mirror 32 is formed by arranging two reflecting mirrors in an inverted C shape. Further, the shutter / auxiliary reflecting mirror 32 formed by combining two reflecting mirrors has a smaller cross-sectional size from the side than the main reflecting mirror. In this way, by combining ellipsoids having different curvatures to collect light at the second focal point of the main reflecting mirror 23, the ultraviolet light is efficiently collected, and the shutter / auxiliary reflecting mirror 32 is rotated. In this case, the turning radius can be reduced.

Reference numerals 40 and 41 denote each shutter and auxiliary reflecting mirror 3.
The rotating shafts 42 and 43 disposed at one end of the rotating shaft 2 are gears supported on the outer ends of the rotating shafts and have a plurality of engaging teeth 45 having different rotation radii. Further, gears having a plurality of engaging teeth 45 having different rotation radii are arranged alternately. By combining different desired engaging teeth, the turning radius of the shutter / auxiliary reflecting mirror can be changed. The rotating shafts 40 and 41 supporting the gears 42 and 43 are configured so as to be able to move laterally with respect to the lateral component wall of the irradiation device main body 11 to change the interval. To change the rotation radius by changing the interval between the two shutter / auxiliary reflecting mirrors, the two shutter / auxiliary reflecting mirrors are moved along the long hole of the component wall 44 and fixed at a desired position.

Reference numeral 50 denotes a gear 4 of the shutter unit 30.
A motor provided on the outer surface on the opposite side to the motors 2 and 43. 51
Is a drive gear that is rotated by the rotation of the motor 50, 52 is a driven gear that is disposed in engagement with the drive gear 51,
It is driven in conjunction with the rotation of the drive gear 51 to open and close the shirt. When the motor 50 is rotated, the drive gear 51 and the driven gear 52 rotate, and then one of the shutter / auxiliary reflectors 32 rotates, so that the other shutter / auxiliary reflector 32 is rotated via the gears 42 and 43. Can rotate to open and close the shutter / auxiliary reflector.

The above-described ultraviolet irradiation apparatus is used by irradiating ultraviolet rays as follows. As shown by the solid lines in FIGS. 5 and 6, when the shutter / auxiliary reflector 33 is open, the ultraviolet light is applied to the irradiated surface to cure the paint or ink on the surface of the work. At this time, the cooling air enters through the air holes 13 and the like of the irradiation device main body 11 and is sucked through the suction holes 14 to cool the inside of the device.

The ultraviolet irradiation device is configured as follows when not cured. As shown by the dotted lines in FIGS. 5 and 6, when the shutter / auxiliary reflector 32 is in a closed state, no ultraviolet light is irradiated on the irradiated surface, and there is no thermal influence on the work. When the paint or ink is cured, the light source is turned on by opening the shutter / auxiliary reflector 32, so that the paint or ink on the surface of the work is efficiently cured.

[0020]

According to the first aspect of the present invention, the light source unit and the shutter unit can be attached and detached without removing the entire ultraviolet irradiation device, so that work can be easily performed at the time of maintenance and inspection. In addition, since the shutter and auxiliary reflecting mirror can be configured to be small, the entire apparatus can be reduced in size, and the light collection rate can be increased, so that there is a special effect that the paint or ink can be efficiently cured.

According to the second aspect of the present invention, the main reflecting mirror and the shutter / auxiliary reflecting mirror are combined with elliptical bodies having different curvatures and have the same light-collecting point. There is a special effect that paints and inks can be cured well, and the entire apparatus can be made compact.

According to the third aspect of the present invention, there is a special effect that a shutter / auxiliary reflecting mirror having a different turning radius can be easily configured.

According to the fourth aspect of the present invention, by selecting the gear, it is possible to easily change the rotation radius of the shutter and the auxiliary reflecting mirror, and irradiate a desired ultraviolet ray to the workpiece to efficiently paint. It can cure ink and ink with special effects.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an ultraviolet irradiation device according to the present invention.

FIG. 2 is a perspective view of a light source unit in the ultraviolet irradiation device shown in FIG.

FIG. 3 is a perspective view of a shutter unit in the ultraviolet irradiation device shown in FIG.

FIG. 4 is a perspective view of a shutter unit in the ultraviolet irradiation device as viewed from a direction opposite to FIG. 3;

FIG. 5 is a side view of the ultraviolet irradiation device according to the present invention.

FIG. 6 is a side view of a shutter / auxiliary reflector of the ultraviolet irradiation device according to the present invention.

FIG. 7 is a side view of a conventional ultraviolet irradiation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Irradiation apparatus main body 12 Irradiation window 13 Air hole 14 Intake hole 15 Lid 20 Light source unit house 22 Handle 23 Main reflector 24 Insulator 30 Shutter unit 32 Shutter / auxiliary reflector 40, 41 Rotation axis 42, 43 Gear 45 Engaging tooth 50 Motor 51 Drive gear 52 Follower gear

Claims (4)

[Claims] 1. A light source unit housing containing a main reflecting mirror and an openable and closable shutter below a light source unit house inside an irradiation device main body having an irradiation window formed on a front surface. The shutter and auxiliary reflector are arranged so that the light from the light source is focused on the second focal point of the main reflector. An ultraviolet irradiator, wherein the convergence points are the same. 2. The ultraviolet irradiation according to claim 1, wherein the main reflecting mirror and the shutter / auxiliary reflecting mirror are configured by combining elliptical bodies having different curvatures so that the converging point is the same. apparatus. 3. The ultraviolet irradiation apparatus according to claim 1, wherein the shutter / auxiliary reflecting mirror comprises two reflecting mirrors arranged in an inverted C shape. 4. A rotating shaft is arranged at one end of the shutter / auxiliary reflecting mirror, and gears having a plurality of engaging teeth having different rotating radii are alternately arranged at the outer end of the rotating shaft, and the rotating radii are different. 4. The ultraviolet irradiation apparatus according to claim 1, wherein a rotation radius of the shutter and auxiliary reflecting mirror can be changed by combining desired engaging teeth.