JPH0720576A - Ultraviolet irradiation device - Google Patents

Abstract

PURPOSE:To improve the cooling effect of the temp. of an irradiation chamber and housing chambers and to prevent the deposition of oil on a work by sepa rately constituting the irradiation chamber and driving mechanism housing chambers, separately cooling these chambers and setting the pressure of the irradiation chamber higher than the pressure of the housing chambers. CONSTITUTION:A main unit 1 of this UV irradiation device is composed of the irradiation chamber 2 and the driving mechanism housing chambers 3a, 3b. An irradiating device 6 is arranged on a conveyor 5 and the work 11 is transported by this conveyor 5. The housing chambers 3a, 3b are provided with the driving mechanism 7 of the conveyor 5. Cooling air is blasted through a filter 4 from the upper part of the main unit 1 of the UV irradiation device into the irradiation chamber 2. The cooling air is also blasted through a filter 9 into the housing chambers 3a, 3b. The temp. of the housing chambers 3a, 3b falls to the temp. lower than the temp. of the conventional construction and the splashing of the oil of the driving mechanism 7 does not arise. Since the pressure of the irradiation chamber 2 is set higher than the pressure of the housing chambers 3a, 3b, the intrusion of the dust in the housing chambers 3a, 3b into the irradiation chamber 2 does not arise.

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 an ultraviolet curable resin on the surface of glass, paper or resin and to cure the ultraviolet curable resin with an ultraviolet curable light source arranged on the ultraviolet curable resin. ing. Further, by disposing the ultraviolet curing light source close to the work by about 15 cm, the work can be efficiently irradiated with the ultraviolet ray of the ultraviolet curing light source. In the conventional ultraviolet irradiation device, as shown in FIG. 3, for example, an appropriate number of ultraviolet curing light sources 2 are provided inside the irradiation device main body 21.
2 is accommodated, a conveyor 23 is arranged at the lower end of the ultraviolet curing light source 22, and a blower 24 is arranged above the irradiation device main body 21. The drive mechanism 25 for driving the conveyor 23 is covered with a lid 26 in order to prevent oil from scattering.

[0003]

According to the ultraviolet irradiating device having the above structure, the temperature on the conveyor 23 becomes 250 ° C. due to the heat generated from the ultraviolet curing light source 22, and the temperature of the accommodating chamber accommodating the drive mechanism 25 is It becomes a high temperature of 170 ° C to 200 ° C. When the temperature of the storage chamber in which the drive mechanism is stored reaches a high temperature of 170 ° C. to 200 ° C., oil tends to scatter. If the oil is scattered in the storage chamber that stores the drive mechanism, a part of the oil enters the storage chamber that stores the light source and adheres to the work, causing defective products. Further, since the air is cooled from the upper part of the irradiation device main body by the blower, the effect of cooling the temperature of the room accommodating the light source is improved, but the temperature of the room accommodating the drive mechanism is covered by the lid 26. There is a drawback that the cooling effect is small. Further, the cooling air blown from the upper part of the irradiation device main body by the blower blows up the dust inside the device, so that it cannot be cooled with a strong wind.

The present invention has been made in view of the above points, and it is possible to enhance the effect of cooling the temperature of the room in which the light source is housed and the room in which the drive mechanism is housed. It is an object of the present invention to provide an ultraviolet-curing irradiation device that does not adhere.

[0005]

The present invention has the following constitution in order to solve the above problems. That is, the ultraviolet curing light source is arranged close to the work. In addition, the irradiation chamber for accommodating the work and for accommodating the ultraviolet curing light source and the irradiation chamber for accommodating the drive mechanism and the drive mechanism accommodating chamber for accommodating the drive mechanism are separately configured. Cool separately. The pressure in the irradiation chamber is set higher than that in the drive mechanism storage chamber.

[0006]

In the structure according to claim 1 described above, the irradiation chamber and the drive mechanism storage chamber are separately cooled, and the pressure of the irradiation chamber is higher than that of the drive mechanism storage chamber. The cooling effect can be enhanced, and scattered oil droplets do not enter the irradiation chamber through which the work passes.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. Reference numeral 1 is a main body of the ultraviolet irradiation device, which is composed of an irradiation chamber 2 and drive mechanism storage chambers 3a and 3b. Reference numeral 4 denotes a filter arranged above the irradiation chamber 2, through which the cooling air of the cooling mechanism passes. Reference numeral 5 is a conveyor arranged in the ultraviolet irradiation apparatus main body 1, and 6 is an irradiator arranged on the conveyor 5, which is configured to accommodate, for example, 5 high-pressure discharge lamps of 8 kilowatts.

Reference numeral 7 denotes a drive mechanism for driving the conveyor 5 in the drive mechanism storage chambers 3a, 3b, which is constructed by using bearings. Reference numeral 8 is a partition for forming a drive mechanism housing chamber that houses the drive mechanism 7. Reference numeral 9 is a filter which is arranged at an appropriate position in the drive mechanism storage chambers 3a and 3b. 10 is an exhaust fan. Reference numeral 11 denotes a work conveyed by the conveyor 5, which is constructed by coating an ultraviolet curable resin on the surface of glass, paper, resin or the like.

As described above, when the cooling air is blown into the irradiation chamber 2 through the filter 4 from the upper portion of the ultraviolet irradiation apparatus main body 1 and the cooling air is blown through the filter 9 into the drive mechanism housing chambers 3a and 3b, the driving mechanism storage chambers 3a and 3b are driven. Mechanism storage room 3a,
The temperature of 3b is about 40 ° C. to 50 ° C., which is 130 ° C. or more lower than that of the conventional structure, and the oil of the drive mechanism is not scattered. Further, since the pressure of the irradiation chamber is higher than that of the drive mechanism housing chamber, dust in the drive mechanism housing chamber does not enter the irradiation chamber.

[0010]

As described above, according to the present invention, the irradiation chamber for accommodating the workpiece and accommodating the ultraviolet curing light source and the irradiation chamber for accommodating the drive mechanism are separated from each other. Since the irradiation chamber and the drive mechanism storage chamber are separately cooled, and the pressure of the irradiation chamber is higher than that of the drive mechanism storage chamber, it is possible to enhance the cooling effect of the irradiation chamber and the drive mechanism storage chamber. Furthermore, there is a unique effect that scattered oil droplets do not enter the irradiation chamber through which the work passes.

[Brief description of drawings]

FIG. 1 is a front view of an ultraviolet curing irradiation device of the present invention.

FIG. 2 is a perspective view of an ultraviolet curing irradiation device of the present invention.

FIG. 3 is a front view of a conventional ultraviolet curing irradiation device.

[Explanation of symbols]

 1 External line irradiation device main body 2 Irradiation chamber 3a, 3b Drive mechanism storage chamber 4 Filter 5 Conveyor 6 Irradiator 7 Drive mechanism 8 Partition 9 Filter 10 Air blower 11 Work

Claims (1)

[Claims] 1. An ultraviolet irradiation device configured by arranging an ultraviolet curing light source in the vicinity of a work, and an irradiation chamber containing an irradiator for conveying the work and accommodating the ultraviolet curing light source, It is characterized in that the drive mechanism storage chamber for storing the drive mechanism is separately configured, the irradiation chamber and the drive mechanism storage chamber are separately cooled, and the pressure of the irradiation chamber is set higher than that of the drive mechanism storage chamber. UV irradiation device.