JPH11132938A - Weathering test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weathering test device whose structure is simple and which can precisely measure the ultraviolet rays of plural wavelengths in one ultraviolet ray radiated illuminance receiver. SOLUTION: The ultraviolet ray radiation illuminance receiver is provided with a lighting window 28 lighting the ultraviolet rays, a light transmission body 25 transmitting the ultraviolet rays and plural branch light transmission bodies 31 and 32 which are orthogonal to the tip of the light transmission body 25 and are arranged. The upper faces of inner ends in the respective branch transmission bodies 31 and 32 are constituted on inclined faces and sensors 35 and 36 measuring radiation illuminance different in the wavelengths are arranged at the outer ends of the branch transmission bodies 31 and 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a weather resistance test apparatus.

[0002]

2. Description of the Related Art A weather resistance test apparatus is an apparatus for irradiating a sample such as a plastic or a coated plate with ultraviolet rays, and setting a temperature and a humidity to test a change of the sample. As shown in FIG. 3, for example, a conventional weather resistance test apparatus has an ultraviolet light source 2 housed in a water-cooled jacket disposed inside a weather resistance test apparatus body 1 and supports a sample around the ultraviolet light source. It has a support 3. Further, a heater 5 is provided inside the air circulation box 4 inside the weather resistance test apparatus main body 1, and the heater 5 is configured to adjust the temperature inside the sample chamber of the weather resistance test apparatus main body 1. Further, the apparatus is configured so that water vapor is fed into the sample chamber from a humidification tank arranged outside the weather resistance test apparatus main body 1, the humidity inside the sample chamber is adjusted, and the test is performed. Further, the irradiance is measured by an ultraviolet irradiance light receiver 6 arranged inside the weather resistance test apparatus main body 1, and the irradiance is controlled so as to be a set value.

[0003]

By the way, according to the conventional ultraviolet irradiance light receiving device 6, it is impossible to measure other than one specific wavelength, and to measure the ultraviolet irradiance of plural wavelengths,
It is necessary to provide a plurality of ultraviolet irradiance light receivers according to the number of wavelengths to be measured, which complicates the structure. Also, when a plurality of UV irradiance receivers are provided and the UV light source is turned on,
There is a disadvantage that the shadow of the ultraviolet irradiance receiver is generated and the ultraviolet irradiance to the sample is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a simple structure, and is capable of accurately measuring ultraviolet rays of a plurality of wavelengths with a single ultraviolet irradiance receiver. It is intended to provide a test device.

[0005]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 has the following configuration. In other words, a weather resistance test in which an ultraviolet light source is placed inside the main body of the weather resistance test apparatus, the sample is rotatably supported around the ultraviolet light source, and an ultraviolet irradiance receiver is provided inside the main body of the weather resistance test apparatus Related to the device. Further, the ultraviolet irradiance light receiver includes an illuminating window that illuminates the ultraviolet light, a light guide that guides the ultraviolet light, and a plurality of branch light guides that are arranged orthogonal to the tip of the light guide. It has and is constituted. The upper surface of the inner end of each branch light guide is formed as an inclined surface, and a sensor for measuring irradiance having a different wavelength is arranged at the outer end of each branch light guide.

According to a second aspect of the present invention, in the structure of the first aspect, the inclined surface on the inner end upper surface of each branching light guide is formed as a reflecting surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In the figure, reference numeral 11 denotes a weather resistance test apparatus main body, which is formed in a box shape. Reference numeral 12 denotes an opening / closing door which is pivotally mounted on the weather resistance test apparatus main body 11. Reference numeral 13 denotes an ultraviolet light source mounted inside the weather resistance test apparatus main body 11, which is configured using, for example, a discharge lamp for ultraviolet radiation of 7.5 kW. The ultraviolet light source is housed in a water-cooled jacket. Reference numeral 14 denotes a sample holder which is rotatably disposed around the ultraviolet light source. When viewed from the side, a sample holder 14 having an enlarged diameter at the top, a vertical hook 16, and a lower part And an engaging portion 17 formed by expanding the diameter. Reference numeral 18 denotes a support, which is configured to support the sample holder 14. For example, a plate-shaped plastic or a painted plate is hooked and supported on the sample hook 14.

Reference numeral 21 denotes a blower provided inside the weather resistance test apparatus main body 11, and reference numeral 22 denotes a wind direction body for uniformly blowing the wind from the blower 21 in the sample direction. It has a double configuration with a certain gap. Reference numeral 20 denotes an air circulation box, and reference numeral 23 denotes a heater arranged inside the air circulation box 20, which adjusts the temperature inside the sample chamber. Reference numeral 24 denotes a cooler arranged inside the air circulation box 20.

FIG. 2 schematically shows the ultraviolet light source illuminance light receiving device from the side. Reference numeral 25 denotes a light guide constituting the ultraviolet irradiance light receiver, which is made of, for example, quartz glass. The lower end of the light guide 25 has an inclined portion 26. Reference numeral 27 denotes a pipe containing the light guide 25, which is made of, for example, stainless steel. In addition, a luminous window 28 is provided near the outer end of the pipe.
Reference numeral 29 denotes a protective tube which covers the outer end of the pipe 27 and the light guide 25, and is made of, for example, quartz glass.

Reference numerals 31 and 32 denote branching light guides arranged orthogonally to the tip of the light guide 25 and are made of, for example, quartz glass. The branch light guides 31 and 32 are the light guide 2.
At the joint portion with No. 5, it is divided into two and has a slight gap. The corresponding surface of each of the two divided light guide glasses has an inclined surface on the upper surface. When the upper surface of the light guide glass is an inclined surface, the ultraviolet light from the light guide can be efficiently guided to the sensor by the branch light guide. Reference numerals 33 and 34 denote pipes that cover the branching light guide, and are made of, for example, stainless steel. Reference numerals 35 and 36 denote sensors arranged at the tips of a plurality of light guide glasses, which are configured using, for example, photodiodes or phototransistors.

Next, the test of the sample in the above-mentioned weather resistance test apparatus will be described. When the start switch of the weather resistance test apparatus is pressed, the cooling water circulates inside the water cooling jacket covering the ultraviolet light source and is blown into the weather resistance test apparatus. After that, the ultraviolet light source is turned on, and after about one minute, the sensor detects the ultraviolet illuminance of the ultraviolet light source and sends a detected signal to the control board, controls the ultraviolet illuminance of the ultraviolet light source, and applies a predetermined amount to the sample to be tested. Irradiate with ultraviolet light. In addition, since the sensor at the outer end of each branching light guide senses a different wavelength, different ultraviolet rays are measured by one ultraviolet irradiance light receiver. For example, from 300 nm to 400
nm wavelength and 340 nm or 420 depending on the standard
Measure and control the wavelength in nm.

[0012]

According to the present invention described above, the structure of the weather resistance test apparatus is simplified, and there is a special effect that a single ultraviolet illuminance light receiver can accurately measure ultraviolet rays of a plurality of wavelengths. .

[Brief description of the drawings]

FIG. 1 is a side view of a weather resistance test apparatus according to the present invention.

FIG. 2 is a side view showing an example of use of the ultraviolet light source illuminance light receiver of FIG. 1;

FIG. 3 is a side view of a conventional weather resistance test apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Weather resistance test apparatus main body 12 Opening / closing door 13 Ultraviolet light source 14 Sample holder 18 Support body 20 Air circulation box 21 Blower 22 Winding body 23 Heater 24 Cooler 25 Light guide 26 Inclined part 27 Pipe 28 Illuminated window 29 Protective tube 31 , 32 Branch light guide 33, 34 Covering pipe 35, 36 Sensor

Claims (2)

[Claims] An ultraviolet light source is arranged inside a weather resistance test apparatus main body, a sample is rotatably supported around the ultraviolet light source, and an ultraviolet irradiance light receiver is provided inside the weather resistance test apparatus main body. In the weather resistance test apparatus, the ultraviolet irradiance light receiver includes an illuminating window that illuminates the ultraviolet light, a light guide that guides the ultraviolet light, and a plurality of light guides that are arranged orthogonal to the tip of the light guide. A branch light guide, and the upper surface of the inner end of each branch light guide is formed as an inclined surface, and a sensor for measuring irradiance having a different wavelength is arranged at the outer end of each branch light guide. A weather resistance test apparatus characterized in that: 2. The weather resistance test apparatus according to claim 1, wherein the inclined surface on the upper surface of the inner end of each branch light guide is formed as a reflection surface.