JP2020006329A - Ultraviolet ray irradiation device - Google Patents

Abstract

To provide an ultraviolet lay irradiation device that has a structure capable of reliably irradiating a side wall in a narrow part such as a recess part of a vehicle body with an ultraviolet lay.SOLUTION: An ultraviolet ray irradiation device 1 includes a plurality of ultraviolet ray-emitting diodes 2 for irradiating an irradiated object coated with an ultraviolet curable material with an ultraviolet ray. A reflecting mirror 6 is installed in a position facing the ultraviolet ray-emitting diodes 2 to reflect the ultraviolet ray radiated from the ultraviolet ray-emitting diodes 2 in a predetermined direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ultraviolet irradiation device that can be used to cure an ultraviolet curing paint applied to a surface of a vehicle body, particularly, a narrow portion of an automobile.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 60-94136) discloses an irradiation apparatus for curing and drying an ultraviolet-curable paint or ink applied or printed on the surface of an object to be irradiated. Ultraviolet light, which is configured so that the irradiation tools are arranged in such a way that the entire irradiation tool moves up and down according to the size of the outer shape of the irradiation object, and that all or a part of the irradiation tool moves radially with respect to the center direction. An irradiation device is disclosed.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 5-76822) discloses that after applying an ultraviolet curable paint to a vehicle body to which an opening / closing body such as a front door is attached, the vehicle body is placed in a drying section while the opening / closing body is kept open. The paint of the vehicle which is carried in, and is irradiated with ultraviolet rays from the ultraviolet irradiation device provided in the drying section toward the vehicle body, thereby introducing the ultraviolet rays into the inside of the vehicle body from the opening of the vehicle body and drying the paint. A method of drying is disclosed.

JP-A-60-94136 JP-A-5-76822

  When the object to be irradiated has a complicated shape, as disclosed in Patent Document 1, the ultraviolet irradiation device is moved up and down according to the size of the external shape of the object to be irradiated, or the entire irradiation device is used. Alternatively, it is necessary to move a part radially with respect to the center direction.

  Further, as disclosed in Patent Literature 2, when an ultraviolet curable paint is applied to a vehicle body, there is a problem that even if ultraviolet irradiation is performed with the opening / closing body opened, the ultraviolet light does not reach the details. For this reason, it is necessary to irradiate an ultraviolet ray to a portion where the ultraviolet ray does not reach, using a handy type ultraviolet irradiating device. However, a cooling device of an ultraviolet light emitting diode (UVLED) becomes large in the handy type ultraviolet irradiating device. In the case of a side wall such as a narrow recess, it is very difficult to make the UVLED face the side wall.

  Therefore, an object of the present invention is to provide an ultraviolet irradiation device having a structure capable of reliably irradiating the side wall of a narrow portion such as a concave portion of a vehicle body with ultraviolet light.

  Therefore, the present invention provides an ultraviolet irradiating apparatus including a plurality of ultraviolet light emitting diodes that irradiate an ultraviolet ray to an object to which an ultraviolet curable material is applied, wherein the position facing the ultraviolet light emitting diode is irradiated from the ultraviolet light emitting diode. A reflecting mirror for reflecting the ultraviolet rays in a predetermined direction. Thus, by inserting the reflecting mirror into a narrow place where the ultraviolet irradiation device does not enter, the side surface of the narrow place can be irradiated with ultraviolet rays to cure the ultraviolet curable material.

  The ultraviolet light emitted from the ultraviolet light emitting diode (UVLED) preferably has a wavelength of 360 nm to 410 nm. The reflecting mirror is preferably a mirror plate having a high ultraviolet reflectance, and the reflecting surface of the reflecting mirror is desirably planar. Further, the reflecting surface of the reflecting mirror is desirably a concave R-shape when ultraviolet rays are concentrated on the irradiation object, and a convex R-shape when it is desired to enlarge the ultraviolet rays on the irradiation object. It is desirable to have an R shape. Further, by changing the angle of the reflecting surface of the reflecting mirror, the reflection angle of the ultraviolet light is adjusted, so that the irradiation object can be reliably irradiated. Further, it is desirable that the angle of the reflecting mirror is in the range of 35 ° to 60 °.

  Further, a plurality of the ultraviolet light emitting diodes are arranged so as to be substantially rectangular, and the reflecting mirror is a pyramid comprising four reflecting surfaces facing a plurality of ultraviolet light emitting diodes arranged on respective sides of the substantially square. A trapezoidal shape is desirable.

  Thereby, when the irradiation target is a substantially rectangular concave shape, by inserting the truncated pyramid-shaped reflecting mirror into the concave irradiation target, the ultraviolet light emitted from the ultraviolet light emitting diode is converted into the truncated pyramid shape. The light can be reflected on the respective reflecting surfaces of the reflecting mirror and radiated on the four inner side surfaces of the concave-shaped object to be irradiated.

  Furthermore, the plurality of ultraviolet light emitting diodes may be arranged in a substantially annular shape, and the reflecting mirror may have a truncated cone shape having a curved reflecting surface facing the plurality of ultraviolet light emitting diodes arranged in a substantially annular shape. desirable.

  Thereby, when the irradiation target has a substantially annular concave shape, by inserting the truncated cone-shaped reflecting mirror into the concave irradiation target, the ultraviolet rays emitted from the plurality of ultraviolet light emitting diodes can be irradiated with the truncated cone. Since the light can be reflected by the curved reflecting surface, the light can be applied to the inner side surface of the substantially circular concave object to be irradiated.

  Furthermore, it is preferable that the distance from the reflecting mirror is adjustable from the ultraviolet light emitting diode.

  This makes it possible to adjust the distance from the ultraviolet light emitting diode to the reflecting mirror, so that the ultraviolet light can be reliably applied to the side wall surface of the concave portion that cannot be applied from above.

  ADVANTAGE OF THE INVENTION According to the ultraviolet irradiation apparatus which concerns on this invention, since only the reflection mirror, such as a concave part and a narrow part, can irradiate the ultraviolet light from an ultraviolet light emitting diode to the side wall surface of a concave part or a narrow part, the concave part And the ultraviolet curing material applied to the side wall surface of the narrow portion can be surely cured. Further, the ultraviolet curing material applied to the irradiation object can be cured uniformly.

FIG. 1 is an explanatory diagram illustrating an ultraviolet irradiation device according to a first embodiment of the present invention. FIG. 4 is an explanatory diagram illustrating an ultraviolet irradiation device according to a second embodiment of the present invention. FIG. 5 is an explanatory perspective view illustrating an ultraviolet irradiation device according to a second embodiment of the present invention. FIG. 9 is an explanatory perspective view of a reflecting mirror of the ultraviolet irradiation device according to the third embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  An ultraviolet irradiation device 1 according to a first embodiment of the present invention is, for example, as shown in FIG. 1, an ultraviolet irradiation unit 3 in which a plurality of ultraviolet light emitting diodes 2 are arranged, and is mounted on the ultraviolet irradiation unit 3, An ultraviolet light emitting device 5 constituted by at least an irradiating unit 3 and a cooling unit 4 for cooling a substrate for operating the ultraviolet irradiating unit 3; and a position provided in the ultraviolet light emitting device 5 and facing the ultraviolet light emitting diode 2. And a reflecting mirror 6 provided in the camera. The ultraviolet irradiation unit 3 includes an ultraviolet light emitting diode 2 that emits ultraviolet light having a predetermined wavelength (for example, 405 nm) in a range of 360 nm to 410 nm. The cooling unit 4 is provided with a cooling radiator and a cooling fan.

  The reflecting mirror 6 is arranged at a position facing the ultraviolet light emitting diode 2 by a support arm 7 extending from the ultraviolet light emitting device 5, and the angle of the reflecting mirror 6 is changed from 35 ° to 60 ° by an angle adjusting mechanism 8. Is set to a predetermined angle within the range of. The reflecting mirror 6 can adjust the distance from the ultraviolet light emitting diode 2 by adjusting the length of the support arm 7. Further, a mirror having a high reflectance of ultraviolet rays is selected as the reflecting mirror 6.

  When the object to be irradiated is the side wall surface 11 of the narrow portion 10 in the ultraviolet irradiation device 1 having the above configuration, the reflecting mirror 6 of the ultraviolet irradiation device 1 is inserted into the narrow portion 10 and the ultraviolet light emission of the ultraviolet irradiation device 1 is performed. The diode 2 emits light. As a result, the ultraviolet light emitted from the ultraviolet light emitting diode 2 is reflected by the reflecting mirror 6 and hits the side wall surface 11 of the narrow portion 10, whereby the ultraviolet curing material applied to the side wall surface 11 is cured.

  The ultraviolet irradiation device 1 according to the second embodiment of the present invention includes, for example, as shown in FIGS. 2 and 3, an ultraviolet irradiation unit 3 (3 a, 3 b, 3 c, 3 d) arranged in a square shape on a base 40 of a cooling unit 4. Is provided. A plurality of ultraviolet light emitting diodes 2 are arranged in the ultraviolet irradiation section 3. Further, a truncated quadrangular pyramid-shaped reflecting mirror 60 is provided to form the reflecting surfaces 6a, 6b, 6c, 6d) facing each of the ultraviolet irradiation sections 3.

  With the above configuration, for example, when the object to be irradiated is the rectangular concave portion 10, the truncated quadrangular pyramid-shaped reflecting mirror 60 is inserted into the concave portion 10a, and the reflecting surfaces 6a, 6b, 6c, 6d is opposed to the side wall surfaces 11a, 11b, 11c, 11d of the concave portion 10a. Thus, by causing the ultraviolet light emitting diode 2 to emit light, the ultraviolet light is applied to the side walls 11a, 11b, 11c, 11d via the reflecting surfaces 6a, 6b, 6c, 6d of the reflecting mirror 60.

  The ultraviolet irradiation device 1 according to the third embodiment of the present invention is characterized in that, as shown in FIG. 4, for example, the reflecting surface 62 of the reflecting mirror 61 is formed in a truncated cone shape. In this case, the ultraviolet irradiation section 3 is formed in a substantially annular shape corresponding to the curved side surface of the reflecting mirror 61, and accordingly, the ultraviolet light emitting diodes 2 are also arranged in a substantially annular shape.

  With the above configuration, for example, when the irradiation target is a circular concave portion 10b, the truncated cone-shaped reflecting mirror 61 is inserted into the concave portion 10b, and the reflecting surface 62 of the reflecting mirror 61 is changed to the concave portion 10b. To the side wall surface 11e. By causing the ultraviolet light emitting diode 2 to emit light, the ultraviolet light is irradiated on the side wall surface 11e via the reflecting surface 62 of the reflecting mirror 61.

  As described above, according to the present invention, the provision of the reflecting mirror enables the narrow portion and the side wall of the concave portion to be efficiently irradiated with ultraviolet rays. For this reason, the ultraviolet curable material applied to a concave portion such as a gasoline tank opening of a vehicle body can be surely cured.

DESCRIPTION OF SYMBOLS 1, 1A Ultraviolet irradiation device 2 Ultraviolet light emitting diode 3 Ultraviolet irradiation unit 4 Cooling unit 5 Ultraviolet irradiation device 6, 60, 61 Reflector 7 Support arm 8 Angle adjustment mechanism 10 Narrow part 10a, 10b Concave part 11, 11a, 11b, 11c , 11d, 11e Side wall

Claims (4)

In an ultraviolet irradiation device including a plurality of ultraviolet light emitting diodes that irradiate an ultraviolet ray to an irradiation target to which an ultraviolet curable material is applied,
An ultraviolet irradiator, wherein a reflecting mirror is provided at a position facing the ultraviolet light emitting diode to reflect ultraviolet light emitted from the ultraviolet light emitting diode in a predetermined direction.   A plurality of the ultraviolet light emitting diodes are arranged so as to be substantially square, and the reflecting mirror is a truncated pyramid comprising four reflecting surfaces facing a plurality of ultraviolet light emitting diodes arranged on respective sides of the substantially square. The ultraviolet irradiation device according to claim 1, wherein:   A plurality of the ultraviolet light emitting diodes are arranged in a substantially annular shape, and the reflecting mirror has a truncated cone shape having a curved reflecting surface facing the plurality of ultraviolet light emitting diodes arranged in a substantially annular shape. The ultraviolet irradiation device according to claim 2. The ultraviolet irradiation device according to any one of claims 1 to 3, wherein a distance between the reflection mirror and the ultraviolet light emitting diode is adjustable.

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