JPH03169338A - Ultraviolet ray irradiation apparatus - Google Patents

Abstract

PURPOSE:To adjust a light distribution pattern by mounting a guide member extending along a transfer direction, a lift means and an ultraviolet ray irradiation unit. CONSTITUTION:The fixing members 6, 6 mounted on the support parts 56, 56 of both ultraviolet irradiation units 5, 5 slide in both guide grooves 34, 35 of guide members 3, 3 to move above a conveyor 2. The interval between both units 5, 5 is properly made large and the handle 46 of a lift 4 is operated to properly adjust the height of the guide members 3. When the conveyor 2 is operated and objects 1, 1... to be irradiated are continuously supplied, the objects 1, 1 to be irradiated successively pass under both ultraviolet irradiation units 5, 5 to receive the irradiation with ultraviolet rays. By this method, various intensities of ultraviolet rays can be obtained and the irradiation with ultraviolet rays fitted to various needs can be performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides an ultraviolet irradiation device in which a plurality of ultraviolet ray irradiation units are arranged on a conveyor, in which the light distribution pattern can be adjusted at will. This is an improved version.

(Prior Art) Conventionally, for newspapers and other printed matter, a method has been adopted in which photocurable ink is used for printing, and then ultraviolet rays are irradiated to cure and dry the ink. As an ultraviolet irradiation device for this purpose, there is one in which one or more ultraviolet ray irradiation units are disposed on a belt conveyor and the printed matter transported by the belt conveyor is irradiated with ultraviolet rays.

(Problems to be Solved by the Invention) According to conventional logic, the reaction rate of a photochemical reaction is proportional to the irradiation intensity of one ultraviolet ray, and the degree of progress of the reaction is proportional to the cumulative irradiation amount of ultraviolet rays.

However, subsequent research revealed that the reaction rate of photochemical reactions increases exponentially with the intensity of ultraviolet irradiation, and it is clear that the reaction rate can be significantly adjusted by appropriately controlling the irradiation intensity. As a result, adjusting the light distribution pattern of ultraviolet irradiation has become an important issue.

Therefore, an object of the present invention is to provide an ultraviolet ray irradiation device having an ultraviolet irradiation unit, in which the distribution pattern and irradiation distance of ultraviolet rays can be adjusted as desired, and various intensities of ultraviolet rays can be obtained at low cost. shall be.

[Configuration of the Invention (Means for Solving the Problems) The present invention includes frames on both sides of a conveyor for transporting objects to be irradiated.
A pair of guide members are disposed on the pedestal and extend along the conveying direction of the conveyor, and one or more ultraviolet rays are irradiated with an ultraviolet lamp built into the unit body which has a light projection part on the front side. Lifting means configured such that the unit moves on a conveyor while being guided by a pair of guide members through a pair of support parts protruding from both sides thereof, and moves the guide member vertically onto the pedestal. By providing the support part and fixing it at the desired position of the guide member,
The light distribution pattern irradiation distance is adjusted as desired.

(Function) The light distribution pattern of the ultraviolet irradiation unit generally forms a mountain shape with skirts on both sides. When two ultraviolet irradiation units are placed side by side, the light distribution pattern becomes a combination of the light distribution patterns of the individual ultraviolet irradiation units. In this case, if the distance between the two ultraviolet irradiation units is far apart, the distribution in the middle part of both units will be weak; on the other hand, if the two units are brought closer together, the distribution in the middle part will be strong; becomes stronger than the highest value of each unit alone.

Furthermore, since the guide member moves up and down when the lift means is driven, both units can be moved up and down simultaneously to adjust the intensity of the ultraviolet rays.

one. (Example) Hereinafter, details of the present invention will be explained with reference to illustrated embodiments.

1, 1... are objects to be irradiated such as newspapers, printed matter, resin iron plates, etc., 2 is a horizontal conveyor on which the object 1 to be irradiated is placed and transported, and 3.3 are arranged on both sides of this conveyor 2. A pair of guide members 4, 4 extending along the transport direction of the guide members 3, 4 support the pair of guide members 3, 3, and a lift that makes the height variable; , 3 is an ultraviolet irradiation unit that moves on the conveyor 2 and irradiates the object 1 with ultraviolet rays while being guided by the ultraviolet irradiation unit 5.5. It is.

The conveyor 2 is, for example, a belt conveyor, which is arranged horizontally and continuously moves in the direction of the arrow.

The guide members 4, 4 are long bases 31 installed on both sides of the conveyor 2, as shown in FIGS. 2 and 4.
An elongated flat base plate 32.31 is placed on the base plate 32. 2-shaped cross section on the top surface of 32. No base plate 3
2. An elongated slide plate 33 having approximately the same length as 32.
33 are fixed in parallel with one side edge almost aligned, and the drawing board 32
．． Base guide grooves 34. 3
4 and slide guide groove 35. 35 are bored vertically correspondingly, and both guide members 3, 3 are integrally connected by a bridge 36.

The lift 4.4 has a base 31.4 as shown in FIG.
Posts 41 erected at both ends of 31. Worm gear 42 supported by 41... Rotating shafts 43, 43... connected to base plate 33. 33 and is provided parallel to the base plates 33, 33.
The worms 45, 45, . . . provided at the worm gears 42, 42, . . . 44 are connected by a chain (not shown), and when one rotating shaft 44 is rotated by operating a handle 46, the other rotating shaft 44 is rotated synchronously.

Both rotating shafts 44. When 44 rotates, worm 4
5, 45... and worm gears 42, 42..., both base plates 32. 32 are designed to move up and down in synchronization.

As shown in FIG. 3, the ultraviolet irradiation unit 5 has an ultraviolet lamp 53 disposed inside a unit main body 52 having a light projection part 51 on the front, and an air cooling chamber (not shown) behind a reflector 54. An exhaust pipe 55 is led out of the unit main body 52, and base plates 32. A pair of support parts 5 supported on 32
6. 56 and both supporting parts 56. 56 with both guide grooves 34. 35, 34. Through holes 57, 57 corresponding to 35 and smaller in diameter are provided. Furthermore, a frame body 80 having a rectangular cross section as shown in FIG. 8 is built inwardly in the unit outer casing. This frame body 80 has the effect of preventing light leakage because its lower end is still located near the conveyor even when the unit body 52 is raised.

As shown enlarged in FIG. 5, the fixing member 6.6 is attached to the slide guide groove 35. 35 and supporting portions 56, 56
The corresponding slide pins 61 are located around the through holes 57, 57,
6L screw hole 62. 62 and the base guide groove 34. 34 to support portion 56 . 56 through-holes 57, a base pin 63 that abuts around the 57. A screw hole 62.63 is provided at the tip of the through hole 62. A screw 64 that is screwed into the slide pin 62 is provided protrudingly.
l and the base pin 63 are both in the guide groove 34. 35, and when both pins 61 and 63 are tightened, they are crimped and fixed to the base plate 32 and slide plate 33.

Next, the operation of the ultraviolet irradiation device of the above embodiment will be explained.

First, it is assumed that the object 1 to be irradiated is a printed matter printed with ink having a fast photocuring speed. Therefore, first, when the screws between the slide pin 61 and the base pin 63 of the fixed member 6 are loosened, the tightening pressure between the fixed member 6, the pace plate 32, and the slide plate 33 is reduced, and the support part 56 becomes movable. . Therefore, when both ultraviolet irradiation units 5, 5 are pressed and moved, the support portions 56 of both units 5, 5. The fixing members 6, 6 attached to the guide members 3, 3 are connected to both guide grooves 34, 3 of the guide members 3, 3.
5, 34. 35 and moves on the conveyor 2. Therefore, the distance between the two units 5, 5 is appropriately increased, and the height of the guide member 3 is adjusted appropriately by operating the handle 4G of the lift 4. Then, as shown in Figure 6,
The respective ultraviolet ray irradiation intensity curves (indicated by broken lines) of both ultraviolet irradiation units 5, 5 have an appropriate spread, and the bases of both curves partially overlap. Then, the units 5 and 5 are placed directly below the two ultraviolet irradiation units 5 and 5, respectively.
It shows almost the same strength as the single unit, and both units5.
In the middle part of No. 5, the strength is lower than this. Therefore, when the conveyor 2 is operated and the irradiated object 1 is continuously supplied,
The object to be irradiated 1.1... is sequentially irradiated with both ultraviolet irradiation units 5,
5 and is exposed to ultraviolet rays. At this time, as described above, the maximum ultraviolet irradiation intensity is equal to twice that of each unit 5.5 alone, so it is the same as if both units 5, 5 were irradiated separately, and the object 1 to be irradiated is sufficiently photocured.

Further, it is assumed that the object 1 to be irradiated is a printed wiring board or a resin iron plate coated with a resin having a slow photocuring speed. In this case as well, first, the screws between the slide pin 61 and the base pin 63 of the fixing member 6 are loosened to release the fixation of the support part 56, and both ultraviolet irradiation units 5.5 are pressed and brought closer together.

Then, the support portions 56 of both units 5,5. The fixing members 6, 6 attached to the guide member 56 are connected to both guide grooves 3 of the guide members 3, 3.
4, 35, 34, 35 to move on the conveyor 2 and fix both units 5, 5, and operate the handle 46 of the lift 4 to adjust the height of the guide member 3 appropriately. . Then, as shown in FIG. 7, the respective ultraviolet ray irradiation intensity curves (indicated by broken lines) of both the ultraviolet irradiation units 5, 5 are shown.

) has an appropriate spread, and most of the tails of both curves overlap. As shown by the solid line, the total irradiation intensity curve of both ultraviolet irradiation units 5. larger than any of the Therefore, when the conveyor 2 is operated to continuously supply the objects 1 to be irradiated, the objects 1.1, . In this case, as mentioned above, the total irradiation ultraviolet intensity is the same as the usage example shown in Fig. 6, but the maximum irradiation intensity is much higher, so the curing speed of the resin applied to the irradiated object 1 is lower than the maximum irradiation. The UV intensity increases exponentially, and although the resin has a slow curing speed, it fully cures in a short period of time.

In this way, the ultraviolet irradiation device of this embodiment changes the light distribution pattern by adjusting the distance between the two ultraviolet units 5, 5, thereby changing the curing speed of the ink or resin printed or applied to the irradiated object 1. There is no need to change the conveyor speed even when using ink or resin. Furthermore, when using the same ink or resin, the conveyor speed can be changed. Each irradiation unit is equipped with a mirror or lamp with different light distribution characteristics, such as a metal halide lamp, a mercury lamp, or 120W/cml 80W/cm
By attaching these separately, it is possible to obtain even more desired ultraviolet light intensity.

In the above-described embodiment, the ultraviolet irradiation unit 5 has been omitted to simplify the explanation, but it goes without saying that normal accessory members such as a lighting member such as a ballast and a heat ray absorption filter may be provided.

Therefore, in the present invention, any number of ultraviolet irradiation units may be provided, and the guide members and fixing members are not limited to the above-mentioned examples. Desired position 1. The rotation of the wheel may be stopped by inserting a pin into the trough-shaped guide member, or the leg-shaped support may be slid through the trough-shaped guide member and the guide member may be bolted to the desired position, essentially connecting the UV irradiation unit. It suffices if it can be moved on a conveyor and fixed at a desired position.

Furthermore, in the present invention, the conveyor may be a belt conveyor or a net conveyor as long as it can transport the object to be irradiated. Furthermore, the wavelength range for collecting radiation from the ultraviolet irradiation unit should be selected to match the ink or resin to be reacted. And a lift is not essential.

[Effects of the Invention] As described above, the ultraviolet irradiation device of the present invention is provided with a pair of guide members along the moving direction on both sides of the conveyor that transports the object to be irradiated, and these guide members are moved up and down by the lift means. The ultraviolet irradiation unit with a built-in ultraviolet lamp is moved on the conveyor by being guided by a pair of support parts protruding from both sides of the unit main body by the guide member, and the support parts are fixed at a desired position of the guide member. Since it is fixed with a member, if a small amount of ultraviolet light intensity is required, you only need to install one unit, so the cost is low, and the overall size of the device can be reduced to the minimum necessary size, making it possible to install multiple units. When using UV irradiation units, the spacing and height between the UV irradiation units can be adjusted freely.As a result, if the distance between both UV irradiation units is increased, the maximum UV irradiation intensity will be the same as when these UV irradiation units are used alone. Also, if the distance between the two ultraviolet irradiation units is made closer, the maximum ultraviolet irradiation intensity will be greater than when these ultraviolet irradiation units are used alone. If you adjust it away from the object to be irradiated, the light distribution will be wider, and if you adjust it closer to the object, the distribution will be sharper, so you can obtain a variety of ultraviolet intensities, and we can provide ultraviolet irradiation equipment that meets various needs. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the ultraviolet irradiation device of the present invention.
Fig. 2 is a plan view, Fig. 3 is a sectional view of an example of the ultraviolet irradiation unit, which is an essential part, and Fig. 4 is a side view showing the relationship between the guide member and its surrounding parts, which are other main parts. Figure 5 is an enlarged sectional view of the fixing member which is another element, Figures 6 and 7 are graphs explaining the operation of the device of this embodiment, and Figure 8 is the one used in this embodiment. It is a perspective view of a frame. 2... Conveyor, 3... Guide member, 4... Lift means, 5... Ultraviolet irradiation unit 51... Light projecting section, 52... Unit body, 53... Ultraviolet lamp, 54 ...Reflector, 56...Support part.

Claims (1)

[Claims] (1) A conveyor that transfers the wave irradiated object; A pedestal provided along the transfer direction of this conveyor; A pair of guide members disposed on this pedestal and extending along the transfer direction; a lift means disposed on the pedestal for moving the pair of guide members in the vertical direction; a unit body having a light projecting section on the front surface and an ultraviolet lamp built in the unit body; 1
an ultraviolet irradiation unit that irradiates the object with ultraviolet light by moving a pair of support parts on the conveyor while being guided by the pair of guide members; a fixing unit that fixes the support parts to a desired position on the guide member; An ultraviolet irradiation device characterized by comprising: a member;