JPS62128757A - Apparatus for irradiating ultraviolet rays - Google Patents

Abstract

PURPOSE:To prevent an article to be irradiated from flying up or generating wrinkles due to the strong sucking to a transfer body even if said article is a thin paper sheet, by partitioning a suction duct so that suction forces can be regulated in the inlet part side and outlet part side of a furnace body. CONSTITUTION:A suction duct 10 is partitioned between the sides of the inlet part 3 and outlet part 4 of an ultraviolet irradiating furnace body 1 to form an inlet suction chamber 12, an intermediate suction chamber 13 and an outlet suction chamber 14 and, by respectively providing sucking amount regulating dampers to the suction pipes connected to the suction chambers 12, 13, 14 the sucking amounts of the suction chambers 12, 13, 14 can be respectively independently adjusted. By this method, a paper sheet on a conveyor 9 is prevented from flying up by the air stream sucked from the inlet part 3 and outlet part 4 of the furnace body 1 by the cooling air of a light source 2 exhausted from the exhaust port 5 of the furnace body 1 and the sucking action of the suction dust 10 and balance is taken so as to prevent the paper sheet from being adsorbed by the conveyor 9 to a necessary degree or more to regulate the suction amounts of the air at the inlet suction chamber 12 and the outlet suction chamber 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultraviolet irradiation device, and more particularly, to an apparatus for curing and drying ultraviolet curing resin ink printed on paper sheets.

[Conventional technology]

In conventional ultraviolet irradiation equipment of this kind, the object to be irradiated, such as a sheet of paper, is transported from the entrance to the exit of the ultraviolet irradiation furnace using a conveyor such as a mesh conveyor. The ultraviolet irradiation range of the ultraviolet irradiation light source such as a mercury lamp installed in the furnace body is moved to cure and dry the ink printed on the paper sheet, and the paper sheet is reliably transported by the transporting body. The furnace body is equipped with a suction duct that attracts paper sheets to the transport body. l! A trench structure along the sides was used.

[Problem that the invention seeks to solve]

In the conventional ultraviolet irradiation device described above, an intake air flow is generated at the inlet and outlet of the furnace body by the exhaust of the cooling air that cools the ultraviolet irradiation light source and the intake air of the suction duct. The material to be irradiated may fly up from the transport body and not be discharged from the outlet of the furnace body, and if the suction power of the suction duct is increased, particularly thin paper sheets may be However, there are other problems such as the fact that it is strongly adsorbed by the transfer body, which tends to cause wrinkles, and other adverse effects, and that it is difficult to balance the exhaust, intake, and adsorption forces.

The present invention has been made in view of the above-mentioned problems, and the suction force of the suction duct arranged along the moving area of the transport body is adjusted at the inlet and outlet of the ultraviolet irradiation furnace independently from the intermediate part. To provide an ultraviolet irradiation device capable of reliably transporting an object to be irradiated without causing even a thin paper sheet to fly up, or to be strongly adsorbed to a conveying body and cause wrinkles, and to reliably cure and dry ink, etc. It is.

[Means for solving problems]

The ultraviolet irradiation device of the present invention includes an ultraviolet irradiation furnace body having an inlet and an outlet on the right side and a cooling air exhaust section, an ultraviolet irradiation light source provided in the furnace, and an outlet from the inlet of the furnace body. a transporting body for moving the irradiated object through the irradiation area of the light source toward the furnace body; The apparatus is characterized in that the suction duct is provided with a suction duct that is adsorbed onto the transfer body, and the suction duct is divided into an inlet side and an outlet side of the furnace body so that the suction force can be adjusted.

[Effect]

In the ultraviolet irradiation device of the present invention, the object to be irradiated is transferred through the ultraviolet irradiation area by the transfer body by suction in the suction duct disposed along the movement area of the transfer body, and the object is transferred to the ultraviolet irradiation area at the entrance and exit of the ultraviolet irradiation furnace body. By partially adjusting the intake air at the inlet and outlet, the exhaust of cooling air, and the adsorption duct 1~
By balancing the adsorption power of the irradiation object, the object to be irradiated transferred by the transfer body is raised at the inlet and outlet of the furnace body, ensuring that the ultraviolet rays are not affected by the cooling exhaust air and the intake air of the adsorption duct. is transported through the irradiation area and discharged from the outlet of the furnace body.

〔Example〕

The structure of one example of a droplet of the present invention will be explained with reference to the drawings.

Reference numeral 1 denotes an ultraviolet irradiation furnace body, which is provided on the upper part of the machine stand 2. An inlet part 3 is formed in the front lower part of the furnace body 1, and an outlet part 4 is formed in the dominant side lower part. A cooling air exhaust section 5 is opened at the top of the furnace body 1 .

Reference numeral 6 denotes an ultraviolet irradiation light source such as a mercury lamp, which is disposed within the furnace body 1, and this light source 1 is surrounded by a reflector plate 7 having an irradiation port opened downward.

Reference numeral 8 denotes a transport body for transporting the object to be irradiated, and it is composed of a mesh-like conveyor 9. This conveyor 9 is arranged along the upper surface of the machine stand 2, and is connected from the inlet part 3 of the furnace body 1 to the outlet part 4. The object to be irradiated is moved through the ultraviolet irradiation area of the light source 6 toward the object.

Further, 10 is a suction duct] which is disposed along the lower side of the transfer side 11 at the upper part of the conveyor 9, and this suction duct 10
The inlet 3 side and the outlet 4 side of the furnace body 1 are partitioned to form an inlet intake chamber 12, an intermediate intake chamber 13, and an outlet intake chamber 14, and the upper surface of each intake chamber 12, 13, 14 is is the second
As shown in FIG. 3 and FIG. 3, a large number of intake ports 15 are formed toward the upper transfer side 11 of the conveyor 9, and each intake chamber 12, 13, and
are connected to each intake chamber 12, 13, . . . via an intake pipe.
The intake air amount of each intake chamber 12, 13; 14 can be adjusted independently by an intake air amount adjusting damper provided on each intake pipe connected to the intake chamber 14. The inlet air intake chamber 12 and the outlet air intake chamber 14 have an inner dimension L1 and an outer dimension L2 of the furnace body 1 of at least i o cm.
A distance of about 15 cm is required.

The conveyor 9 is driven by an electric motor (not shown) provided on the machine base 2 via a chain or the like.

Further, the exhaust section 5 of the furnace body 1 is connected to a ventilation hole (not shown).

Next, the operation of this embodiment will be explained.

When an object to be irradiated, such as a paper sheet printed with ultraviolet P2 hardening resin, is placed on the conveyor 9, the conveyor 9 is driven, and the sheet is sucked into the conveyor by suction from the intake port 15 of the suction duct 10. The ink is introduced into the furnace body 1 from the inlet part 3 while being adsorbed onto the ink 9, passes through the ultraviolet irradiation area of the light source 6, is cured and dried, and is led out from the outlet part 4 to the outside of the furnace body 1.

Then, the light source 2 is cooled 1. exhausted from the exhaust port 5 of the furnace body 1.
When the paper sheets on the conveyor 9 are prevented from flying up by the air flow taken in from the inlet part 3 cB and the outlet part 4 of the furnace body 1, the paper sheets on the conveyor 9 are The inlet air intake chamber 12 and the outlet air intake chamber 1 of the suction duct 10 are located at the inlet part 3 and the outlet part 4 according to the type of the irradiated object, with a balance so that the object is not attracted more than necessary by the suction duct 9.
Adjust the intake air amount in step 4.

[Effects of the Invention] According to the present invention, since the suction duct is divided into the inlet side and the outlet side of the furnace body so that the suction force can be adjusted, the ultraviolet rays generated at the inlet and outlet sides of the furnace body are The cooling air from the irradiation light source and the airflow from the suction duct prevent the irradiated object from climbing up 9F, and prevent it from being absorbed by the transfer body more than necessary in the middle of the furnace body. The amount of intake air in the suction ducts at the outlet can be adjusted, making it easy to balance the exhaust, intake, and adsorption at the inlet and outlet of the furnace body, making it especially effective for irradiating objects such as thin sheets of paper. It can be transported inside the furnace body.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of an ultraviolet irradiation light source showing an embodiment of the present invention, FIG. 2 is a plan view of the same suction duct, and FIG. 3 is an explanatory plan view of the same suction duct. 1..Ultraviolet irradiation furnace body, 3..Inlet section, 4..Outlet section,
5. Exhaust section, 6. Ultraviolet irradiation light source, 8. Transport body,
10... Adsorption duct.

Claims (1)

[Claims] (1) An ultraviolet irradiation furnace body having an inlet portion and an outlet portion and a cooling air exhaust portion, an ultraviolet irradiation light source provided within the furnace body, and an ultraviolet irradiation light source provided in the furnace body from the inlet portion to the outlet portion. A transporting body for moving the irradiation object through the irradiation area of the light source, and a transporting body provided at the lower part of the furnace body along the moving area of the transporting body, and the irradiated object being transported by the transporting body is adsorbed to the transporting body. An ultraviolet irradiation device comprising: an adsorption duct, wherein the adsorption duct divides an inlet side and an outlet side of the furnace body so that suction force can be adjusted.