JP2015000401A - Ultraviolet irradiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize, by targeting an ultraviolet irradiator for forming a resin film on a treatment target surface by irradiating ultraviolet rays onto an ultraviolet-curable resin coated on the treatment target surface for curing the resin, goals of conserving electric power and of abbreviating the operation time.SOLUTION: An ultraviolet irradiation source and a reflector plate are housed within a case. Moreover, an ultraviolet irradiation port configured on the case is covered with a heat shield plate from the outside, and a gap is secured between this heat shield plate and the case. A fan, furthermore, is installed within the case while ventilation holes are being configured at multiple sites of the case, and the ultraviolet irradiation source, reflector plate, and heat shield plate are arranged within an air passage generated by the fan.

Description

  The present invention relates to an ultraviolet irradiation device used for vehicle repair work or the like.

  For example, when repairing a vehicle, as a surface treatment before painting, an ultraviolet curable resin is applied to the surface to be treated, and the resin is irradiated with ultraviolet rays to cure the resin. Generally, a protective film is formed.

  As a particularly small and lightweight handy type ultraviolet irradiation device used for such work, an ultraviolet irradiation source is installed in a case having an ultraviolet irradiation port, and the ultraviolet light from this irradiation source is applied through the irradiation port. It is comprised so that a process surface may be irradiated.

  For example, when repairing a sheet metal part of a vehicle using such an ultraviolet irradiation device, if the irradiation port is too close to the surface to be processed, heat from the irradiation source may cause thermal distortion in the sheet metal part. Therefore, it is necessary to work while suppressing the overheating of the surface to be processed by separating the irradiation port by 70 mm or more from the surface to be processed. As a result, a loss of power occurs, so a high power irradiation source must be used, Also, shortening the working time has been difficult.

  Patent Document 1 discloses a technique for closing an ultraviolet irradiation port with an ultraviolet transmitting material made of heat-resistant glass.

  However, the ultraviolet light transmitting material in Patent Document 1 is provided in order to prevent harmful ultraviolet rays from being irradiated.

  Therefore, if the ultraviolet irradiation port is simply plugged with heat-resistant glass, the ultraviolet transmissive material itself is heated, and if the heated heat-resistant glass is brought close to the surface to be processed, there is a risk of causing thermal distortion on the surface to be processed. is there.

  JP 2001-340799 A

  The present invention has been made to solve such problems, and its purpose is to work by bringing the irradiation source closer to the surface to be processed by suppressing the transfer of heat from the ultraviolet irradiation source to the surface to be processed. It is an object of the present invention to provide an ultraviolet irradiation device capable of reducing power consumption and working time.

  According to the first aspect of the present invention, an ultraviolet irradiation source, a reflector, and a fan are installed in the case, and the irradiation port is covered with a heat shield that transmits ultraviolet rays but blocks heat. A gap is provided between them, and ventilation holes are provided at a plurality of locations of the case to form a ventilation path that flows along the ultraviolet irradiation source, the reflection plate, and the heat shield plate.

  According to the second aspect of the present invention, the ultraviolet irradiation source is particularly a mercury lamp.

  In the invention according to claim 3, the heat shield plate is particularly a quartz glass plate.

  The invention according to claim 4 attaches the heat shield plate to the outer surface of the case via a spacer.

  According to the present invention, the temperature rise of the ultraviolet irradiation source, the reflecting plate and the heat shield plate can be suppressed by ventilation with a fan, and the temperature rise on the outer surface of the heat shield plate which closes the ultraviolet irradiation port is the heat shield plate itself. Therefore, it is possible to irradiate the surface to be processed with ultraviolet rays from a very short distance, thereby saving power and shortening the working time.

  In addition, by using a mercury lamp as the ultraviolet irradiation source, the ultraviolet irradiation apparatus can be further reduced in size by taking advantage of the characteristics of the mercury lamp that generates a small amount of heat and that can be irradiated with high-energy ultraviolet light.

  In addition, by using a quartz glass plate as the heat shield plate, it is possible to work closer to the surface to be processed by utilizing the characteristics of quartz glass having high transparency and excellent heat resistance.

  Further, by attaching the heat shield plate to the outer surface of the case via the spacer, the gap between the case and the heat shield plate can be easily set to an optimum dimension.

  The perspective view which shows the state which connected the ultraviolet irradiation device and the power supply device   The perspective view which decomposes | disassembles and shows the case of an ultraviolet irradiation device   Front view of UV irradiation device   Top view of UV irradiation equipment   Side view showing attachment state of rear case and support member   Plan view showing a part of the ultraviolet irradiation device cut away   VII-VII sectional view in FIG.   VIII-VIII sectional view in FIG.

  FIG. 1 is a perspective view showing a state in which an ultraviolet irradiation device 1 and a power supply device 2 are connected via a cable 3.

  The ultraviolet irradiation device 1 has a square shape of approximately 90 millimeters in length, 195 millimeters in width, and 110 millimeters in height, and is a small and light weight of about 630 grams. The case 4 is shown in the exploded perspective view of FIG. Thus, the front case 4A and the rear case 4B are combined.

  In addition, since the attitude | position of the ultraviolet irradiation device 1 changes according to the form of use, there is originally no fixed direction concept such as up and down and left and right. The front side is the back side, the back side is the back side, the other two sides are the top side and the bottom side, respectively. This will be described as a plane.

  The front case 4A is generally composed of a front surface portion and upper and lower surface portions where the ultraviolet irradiation opening 5 is provided, and the rear case 4B is generally composed of a rear surface portion and left and right side surfaces to which a handle 6 (see FIG. 1) is attached.

  The front case 4A has an irradiation port 5 on the front surface portion, and is provided with a vent hole 7 formed of a plurality of slits on the left end portion of the upper and lower surface portions.

  3 and 4, columnar spacers 8 are mounted near the four corners of the irradiation port 5 as shown in FIGS. 3 and 4, and guides 9 are provided between the pair of left spacers 8 and the pair of right spacers 8, respectively. The quartz glass plate 10 as a heat shield is supported by both guides 9, and a gap 11 of about 15 millimeters is provided between the front surface of the case 4 and the quartz glass plate 10.

  In general, quartz glass is desirable as a heat shield because it transmits ultraviolet rays but has a heat insulating effect. In particular, it is desirable to use a quartz glass plate 10 having high transparency and a high heat resistant temperature (for example, a heat resistant temperature of about 1000 ° C.).

  In the rear case 4B, as shown in FIG. 5, a handle 6 is attached to the outer surface of the back portion, and a pair of left and right support members 12 are attached to the inner surface of the back portion. The right side surface portion is provided with a plurality of air holes 13 formed of slits, and a fan 14 (see FIGS. 6 and 7) is attached to the inner surface of the right side surface portion so as to face the air holes 13.

  In the case 4, as shown in FIG. 6, a mercury lamp 15 serving as an ultraviolet irradiation source is installed in the vicinity of the irradiation port 5. For example, a 1 kilowatt high-pressure mercury lamp is used as the mercury lamp. Both ends of the mercury lamp 15 are supported by the pair of support members 10 via holders 16, respectively.

  The pair of support members 10 also support a semi-cylindrical reflector plate 17 (see FIG. 8) at the upper and lower edges thereof, and the reflector plate 17 surrounds the mercury lamp 15 from behind. The left and right open ends of the reflection plate 17 are closed by a pair of auxiliary reflection plates 18 supported by the left and right support members 12, respectively (see FIGS. 6 and 8).

  The mercury lamp 15 is supplied with power via the power supply device 2 and emits ultraviolet rays. The ultraviolet rays pass through the irradiation port 5 and pass through the quartz glass plate 10 to be processed 19 (see FIG. 8). Is irradiated.

  Further, a part of ultraviolet rays emitted from the mercury lamp 15 is reflected by the reflecting plate 16 and the auxiliary reflecting plate 18, passes through the irradiation port 5, passes through the quartz glass plate 10, and is irradiated onto the processing surface 19.

  The fan 14 is supplied with power via the power supply device 2 and rotates to take in outside air from the vent hole 13. Thereby, in the case 4, as shown by a dotted line arrow in FIG. 6, a ventilation path that enters from the ventilation hole 13 and is discharged from the ventilation hole 7, and enters from the ventilation hole 13 through the irradiation port 5 through the gap 11. An exhaust passage is formed.

  The reflecting plate 17, the mercury lamp 15 and the quartz glass plate 10 are all installed in these ventilation paths. Therefore, all of these reflectors 17, the mercury lamp 15, and the quartz glass plate 10 are restrained from rising in temperature by ventilation.

  As described above, the heat generated in the mercury lamp 15 is removed by ventilation generated by the rotation of the fan 14, but the temperature of the outer surface of the quartz glass plate 10 is increased due to the heat shielding effect of the quartz glass plate 10 itself. It is further suppressed.

  Therefore, for example, in the base treatment before painting when repairing the sheet metal part of the vehicle, the power supply device 2 and the ultraviolet irradiation device 1 are activated after applying a highly transparent ultraviolet curable resin to the surface 19 to be treated. As shown in FIG. 8, even if the quartz glass plate 10 is brought close to the surface 19 to be processed and the ultraviolet ray is irradiated with ultraviolet rays from a position close to the ultraviolet curable resin, no thermal distortion occurs on the surface 19 to be processed.

  As described above, the quartz glass plate 10 can be made extremely close to the surface 19 to be processed, or the quartz glass plate 10 can be attached to the surface 19 to be irradiated with ultraviolet rays. As a result, power saving and shortening of working time can be achieved. (1 second to 2 seconds) can be achieved.

4 Case 5 Ultraviolet irradiation port 7 Ventilation hole 8 Spacer 10 Quartz glass plate 11 Gap 13 Ventilation hole 14 Fan 15 Mercury lamp 17 Reflection plate

Claims (4)

A case (4) having ventilation holes (7, 13) at a plurality of locations and an ultraviolet irradiation port (5);
An ultraviolet irradiation source (15) that is installed in the case and irradiates ultraviolet rays to the outside of the case through the irradiation port;
A reflector (17) installed in the case for reflecting ultraviolet rays from the irradiation source and irradiating the case outside through the ultraviolet irradiation port;
A heat shield (10) installed so as to cover the ultraviolet irradiation port with a gap (11) between the case and the case;
An air passage that is installed in the case and connects the plurality of air holes, and a fan (14) that forms an air passage that connects the air passage and the gap. The heat shield plate transmits ultraviolet rays. However, the ultraviolet irradiation apparatus is characterized in that it has a heat shielding effect, and the irradiation source, the reflecting plate, and the heat shielding plate are disposed in the air passage.   The ultraviolet irradiation apparatus according to claim 1, wherein the ultraviolet irradiation source is a mercury lamp (15).   The ultraviolet irradiation device according to claim 1, wherein the heat shield plate is a quartz glass plate.   The ultraviolet irradiation device according to claim 1, wherein the heat shield plate is attached to an outer surface of the case via a spacer (8).

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