JP2021025879A - Light discoloration inspection method - Google Patents

Abstract

To provide a light discoloration inspection device for inspecting, in a short time, a possible influence on clothes displayed for a long time in a store by irradiation with light.SOLUTION: A light discoloration inspection device is an optical inspection device for inspecting influence of light on clothes displayed in a store, and includes a dark room 10, a base 20 positioned inside the dark room 10, and a light source 30 positioned inside the dark room 10. The base 20 has a mounting surface 21 on which a clothing component S constituting clothes is placed. The light source 30 irradiates the clothing component S and the mounting surface 21 with light containing short wavelength light. An amount of irradiation per hour of short wavelength light irradiating the clothing component S from the light source 30 is larger than the amount of irradiation per hour of short wavelength light irradiating the clothes in a store.SELECTED DRAWING: Figure 1

Description

The present invention relates to a photochromic inspection apparatus and a photochromic inspection method.

Compared with fluorescent lamps and incandescent lamps, LED lighting has many merits such as low power consumption and low heat generation (see, for example, Patent Document 1). Therefore, as lighting fixtures in houses and stores, replacement of conventional lighting fixtures such as fluorescent lamps and incandescent lamps with LED lighting is being promoted.

Japanese Unexamined Patent Publication No. 2005-19299

On the other hand, the replacement of conventional luminaires with LED luminaires has brought about a new problem that the short wavelength light contained in the LED luminaires promotes discoloration of clothing. On the other hand, when inspecting whether or not the garment is discolored when it is displayed in the store, the period for product development of the garment is extended by the period during which the garment will be displayed in the store. Therefore, it is difficult to inspect in advance whether or not the clothes are discolored during the period when the clothes are displayed in the store.

An object of the present invention is to provide a photochromic inspection apparatus capable of inspecting the light resistance of clothing in a short period of time, and a photochromic inspection method.

The light discoloration inspection device that solves the above problems is a light discoloration inspection device that inspects the influence of light on clothes displayed in a store, and is located in a dark room, a table located inside the dark room, and inside the dark room. The table has a mounting surface on which the clothing components constituting the clothing are placed, and the light source is light containing short-wavelength light on the clothing component and the above-mentioned mounting surface. The amount of short-wavelength light radiated from the light source to the clothing structure per hour is larger than the amount of short-wavelength light radiated by the clothing in the store.

According to the above-described configuration, it is possible to inspect the light resistance of clothing displayed in a store in a short period of time.
The photocolor change inspection apparatus may include a drive unit that rotates the table about a straight line that passes through the center of the above-mentioned mounting surface and is perpendicular to the previously described mounting surface as a rotation axis.

According to the above-described configuration, it is possible to perform a more accurate inspection by reducing the unevenness of light irradiation due to the difference in position on the mounting surface.
The photo-discoloration inspection device may include a light-shielding portion that covers a part of the clothing component and suppresses irradiation of the clothing component with light.

According to the above-described configuration, in the clothing structure after the light irradiation is completed, the light-irradiated region and the light-non-irradiated region are adjacent to each other, so that the result of discoloration by the light can be easily seen with the naked eye. It is also possible to compare and confirm with.

In the light discoloration inspection device, the light-shielding portion may fix the clothing component to the above-mentioned mounting surface.
According to the above-described configuration, by fixing the garment component to the mounting surface, the position deviation of the garment component from the mounting surface can be suppressed, and the inspection can be performed accurately and reliably.

The light discoloration inspection method that solves the above problems is a light discoloration inspection device that inspects the influence of light on the clothes displayed in the store, and is located in a dark room, a table located inside the dark room, and inside the dark room. The pedestal has a mounting surface on which the clothing components constituting the clothing are placed, and the light source irradiates the clothing components and the above-mentioned mounting surface with light to obtain the light source. The irradiation amount of the short wavelength light received by the clothing displayed in the store during a predetermined period is defined as the integrated irradiation amount, and the irradiation amount of the short wavelength light received by the clothing component during a period shorter than the predetermined period is equal to or greater than the integrated irradiation amount. Light is emitted from the light source so as to be.

According to the above-mentioned method, it is possible to confirm whether or not the clothes are affected by the lighting when the clothes are displayed in the store for a predetermined period in an inspection period shorter than the predetermined period.

The schematic block diagram which shows the structure of the light discoloration inspection apparatus. The schematic diagram which shows the state of the garment composition placed on the mounting surface.

[Light discoloration inspection device]
Hereinafter, the configuration of the photochromic inspection apparatus according to the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the light discoloration inspection device includes a dark room 10, a table 20, and a light source 30. The dark room 10 is a rectangular parallelepiped box. The inner surface of the dark room 10 is covered with, for example, a black dark curtain, which suppresses the intrusion of external light into the inside of the dark room 10 and at the same time suppresses the reflection of light inside the dark room 10. The dark room is not limited to a rectangular parallelepiped shape, but may have a three-dimensional shape such as a pyramid, a cylinder, or a cone.

The table 20 includes a mounting surface 21 on which the clothing components S constituting the clothing are placed. Clothing is what you wear, such as clothes, hats, shoes, ties and scarves. The garment component S constitutes garment, and is, for example, a thread composed of vegetable fibers such as cotton and linen, animal fibers such as wool and silk, and synthetic fibers such as nylon and polyester. Or it is a fabric. Further, the garment component S may be leather or fur. Further, the garment composition S may be dyed with a dye.

The table 20 is a columnar three-dimensional object. The mounting surface 21 is the upper end surface of the columnar base 20. The mounting surface 21 is covered with a dark curtain like the inner surface of the dark room 10, and suppresses the reflection of light. The photochromic inspection device further includes a drive unit for rotating the table 20. The drive unit passes through the center of the mounting surface 21 and rotates the table 20 at a constant speed with the straight line L perpendicular to the mounting surface 21 as the rotation axis. The base 20 may have a three-dimensional shape having an upper end surface such as a cube or a prism other than a columnar shape.

The light source 30 is, for example, an LED light source having a relative spectral distribution similar to that of LED lighting used in stores. The light source 30 irradiates the mounting surface 21 of the table 20 and the clothing component S mounted on the mounting surface 21 with light.

As shown in FIG. 2, the light discoloration inspection device includes a light-shielding portion 40 that blocks the light emitted from the light source 30 to the clothing component S. The light-shielding portion 40 is fixed to the clothing component S so as to cover a part of the clothing component S. The light-shielding portion 40 fixed to the clothing component S covers a part of the clothing component S to suppress the irradiation of light on the part of the clothing component S. The light-shielding portion 40 is, for example, thick paper. The light-shielding portion 40 is fixed to the clothing component S by a stapler, an adhesive, or a clip so that the light-shielding portion 40 can be easily removed from the clothing component S.

[Photo discoloration inspection method]
A photo-color change inspection method using the above-mentioned photo-color change inspection device will be described. First, the clothing component S to be inspected is placed on the mounting surface 21. The number of clothing components S to be placed on the mounting surface 21 may be one or a plurality. When one garment component is placed, the garment component S is located at the center of the mounting surface 21. When a plurality of clothing components S are placed, the clothing components S are equidistant from the center of the mounting surface 21 and are located radially with respect to the center of the mounting surface 21. The light-shielding portion 40 covers a part of the clothing component S to suppress the irradiation of light on the part of the clothing component S.

Next, the light source 30 irradiates the clothing component S with light. When the clothes are displayed in the store for a predetermined period, the irradiation amount of the short wavelength light that the clothes will receive from the LED lighting is defined as the integrated irradiation amount. Then, in the inspection period shorter than the predetermined period, the output of the light source 30 is set so as to irradiate the clothing component S with short wavelength light having an irradiation amount equal to or larger than the integrated irradiation amount. At this time, the amount of short-wavelength light radiated from the light source 30 to the clothing component S per hour is larger than the amount of short-wavelength light radiated from the light source 30 in the store.

The predetermined period is, for example, the total business hours of the store in 90 days. Assuming that the business hours of the day are 10 hours, the predetermined period is 900 hours.
The short wavelength light has a wavelength equal to or lower than that of blue light in visible light. The wavelength of the short wavelength light is, for example, 490 nm or less, preferably 490 nm to 350 nm, and more preferably 425 nm to 350 nm.

For example, when a dye is exposed to ultraviolet rays, the bonds of molecules exhibiting a specific color may be broken. At this time, the absorption wavelength band of the light contained in the molecule may change, and the dye may fade.
On the other hand, clothing containing animal fibers such as wool has a yellow pigment generated by receiving ultraviolet rays having a wavelength of 400 nm or less. Then, wool having a yellow pigment is bleached by receiving visible light in a blue light wavelength band near 425 nm.

The light emitted from the light source 30 irradiates the portion of the clothing component S that is not covered by the light-shielding portion 40. On the other hand, the irradiation of light to the portion of the clothing component S covered by the light-shielding portion 40 is suppressed.

After the irradiation of the light from the light source 30 is completed, the clothing component S is removed from the mounting surface 21. Then, in the removed clothing component S, the colors of the portion covered by the light-shielding portion 40 and the portion not covered by the light-shielding portion 40 are compared. When the clothing component S is discolored by the irradiation of light from the light source 30, the color difference between the portion covered by the light-shielding portion 40 and the portion not covered by the light-shielding portion 40 becomes clear. ..

For color comparison, the general rule of dyeing fastness test method specified in JIS standard L 0801 is used as a judgment method, and the gray scale for discoloration and fading specified in JIS standard L 0804 is used as a judgment standard. In the determination method, grades 5 to 1 are defined for the degree of discoloration, and the larger the degree of discoloration, the smaller the grade. As a result of irradiating light with a photo-discoloration inspection device, if the grade indicating the degree of discoloration is 4th grade or less, it is determined that discoloration occurs even when the product is displayed in the store for a predetermined period. If the grade indicating the degree of discoloration is higher than the fourth grade, it is judged that discoloration does not occur when the product is displayed in the store for a predetermined period.

[First experiment]
An experiment was conducted to confirm that the discoloration that occurred in the store could be reproduced using a photo-discoloration inspection device based on the clothing that was reported to be discolored in the store. Among the garments reported to be discolored at the store, garments made of wool knitted fabric were selected, and a part of the knitted fabric constituting the garment was cut out as the garment composition S. The amount of short-wavelength light emitted to the clothing displayed in the store per hour was measured at four locations, and the amount of short-wavelength light emitted to the clothing during 90 days was calculated. However, it was 68,600 mJ / cm ^{2 on average.}

The clothing component S was placed on the mounting surface 21 of the photo-discoloration inspection device, and was irradiated with light from the light source 30. At this time, the irradiation amount of short wavelength light per hour was 7100 mJ / cm ² · h, and the inspection period was 10 hours. The irradiation amount of short wavelength light in the first experiment was measured using an ultraviolet integrated illuminance meter UVPF-A2 (Eye Graphic Co., Ltd.).

After irradiating the light from the light source 30, the degree of discoloration of the clothing component S was determined. As a result, the same discoloration as that of the clothing displayed in the store was observed. Therefore, the discoloration can be reproduced by the photo-discoloration inspection device. all right. When the degree of discoloration was judged, it was grade 4.

[Second experiment]
Using a photo-discoloration inspection device, a fabric made of the same wool knitted fabric as in the first experiment, and discolored using a plurality of garment constituents S (Nos. 1 to 8) dyed with different dyes. The degree was compared. The experimental results are summarized in Table 1 below.

From the results in Table 1, it was found that the degree of discoloration due to light irradiation differs depending on the color of the clothing composition, and that light color is more likely to be discolored by light than dark color.

[effect]
As described above, according to the above-described configuration, the following effects can be obtained.
(1) The reaction rate of a chemical reaction increases as the amount of energy given per hour increases. Therefore, the amount of short-wavelength light radiated from the light source 30 to the clothing component S per hour is set to be larger than the amount of short-wavelength light radiated by the clothing in the store per hour so that the clothes are displayed in the store. It is possible to inspect the light resistance of the clothing to be used in a short period of time. The light discoloration inspection device according to the above embodiment reproduces the discoloration phenomenon of clothing by LED lighting and the light resistance of clothing to LED lighting, which was difficult with a conventional light resistance tester using an incandescent lamp or a fluorescent lamp. It enables confirmation.

(2) The integrated irradiation amount of the short wavelength light irradiated by the light discoloration inspection device on the clothing component S is set to be equal to or more than the integrated irradiation amount of the short wavelength light irradiated on the clothing displayed in the store in a predetermined period. At this time, if discoloration of the clothing component S is not confirmed during the inspection period, it can be estimated that discoloration does not occur even during the predetermined period displayed in the actual store.

Therefore, it is possible to confirm whether or not the clothes are affected by the lighting when the clothes are displayed in the store for a predetermined period in an inspection period shorter than the predetermined period.
(3) The photocolor change inspection device includes a drive unit that rotates the base 20 with a straight line L passing through the center of the mounting surface 21 and perpendicular to the mounting surface 21 as a rotation axis. The light emitted from the light source 30 may have a difference in the amount of irradiation per hour due to the difference in position on the mounting surface 21. In particular, since LED lighting is a collection of point light sources, the amount of irradiation per hour tends to differ depending on the location within the range illuminated by the LED lighting. According to the above-described configuration, it is possible to perform the inspection more accurately by reducing the unevenness of light irradiation due to the difference in the position on the mounting surface 21.

(4) The photo-discoloration inspection device includes a light-shielding portion 40 that covers a part of the clothing component S and suppresses the irradiation of the clothing component S with light. Therefore, in the clothing component S after the light irradiation is completed, the region irradiated with the light and the region not irradiated with the light are adjacent to each other, so that the results of discoloration due to the light can be easily compared with the naked eye. And it becomes possible to confirm.

(5) The light-shielding portion 40 is thick paper. The cardboard can be easily fixed to the clothing composition using a stapler or an adhesive, can be removed, has a high light-shielding property, and can be obtained in large quantities at low cost. Therefore, it is possible to provide a light-shielding portion 40 suitable for application to the clothing component S.

(6) The light-shielding portion 40 is fixed to the clothing component S by means such as a stapler or an adhesive that can easily remove the fixed object. Therefore, it is possible to easily determine the degree of discoloration after irradiating the clothing component S with light.

(7) The dark room 10 suppresses the intrusion of outside light into the inside of the dark room 10. Therefore, it is possible to eliminate the influence of external light when inspecting the influence of light irradiation on the clothing component S. Further, the dark room 10 has a structure in which the inner surface of the dark room 10 can suppress the reflection of light by absorbing light.
An illuminometer that measures the amount of light emitted per hour has a range of incident angles at which light cannot be detected. The light emitted from the light source 30 located so as to face the mounting surface 21 is detected by the illuminometer, but the reflected light diffusely reflected on the inner surface of the dark room 10 causes discoloration of the clothing component S, but the illuminometer. May not be detected by. According to the above-described configuration, it is possible to more accurately confirm the influence of light on the clothing composition S.

As described above, the above-described configuration can be modified and implemented as follows.
-The object to be inspected using the light discoloration inspection device is not limited to the clothing component S constituting the clothing, but may be the clothing itself.

-In the photo-discoloration inspection device, the integrated irradiation amount of the short wavelength light emitted from the photo-discoloration inspection device to the clothing component S in the inspection period shorter than the predetermined period was irradiated to the clothing displayed in the store in the predetermined period. A control unit that controls the irradiation of light from the light source 30 to the clothing component S may be provided so as to exceed the integrated irradiation amount of short wavelength light. With the above-mentioned configuration, it is possible to perform the inspection more accurately.

The control unit is one of 1) one or more processors that execute various processes according to a computer program (software), 2) an integrated circuit (ASIC) for a specific application that executes at least a part of the various processes. It can be configured as a circuit including the above dedicated hardware circuit or 3) a combination thereof. The processor includes a CPU and a memory such as a RAM and a ROM, and the memory stores a program code or an instruction configured to cause the CPU to execute a process. Memory or computer-readable media includes any available medium accessible by a general purpose or dedicated computer.

-The light discoloration inspection device may be configured not to include the dark room 10. Even if it has the above-described configuration, it conforms to the above (1) to (7) as long as it is in an environment where the irradiation of the clothing component S with the external light is suppressed, such as a room in which the external light is blocked. It is possible to get the effect.

The light source 30 is not limited to a configuration in which the clothing component S is irradiated with light at a predetermined irradiation amount per hour, and the output of the light source 30 and the distance between the light source 30 and the mounting surface 21 can be changed. It may be configured. According to the above-described configuration, in addition to the effects according to the above (1) to (7), it is possible to easily confirm the presence or absence of the influence of light in various store environments.

The light source 30 does not have to be located at the center of the table 20. When the distance between the light source 30 and the table 20 is short, the work of taking out the clothing component S from the mounting surface 21 and replacing the clothing component S on which the clothing component S is newly placed becomes complicated. If the position of the light source 30 is deviated from the center of the table 20, even if the distance between the light source 30 and the table 20 is short, the sample replacement work is performed at a position away from the light source 30 on the mounting surface. Can be performed smoothly.

-From the viewpoint of reflecting the inspection results in the actual display, the irradiation amount of the short wavelength light that the light discoloration inspection device irradiates the clothing component S during the inspection period is the short that the clothing displayed in the store receives in a predetermined period. It is preferable that it is equal to the integrated irradiation amount of wavelength light. With the above-described configuration, it is possible to more accurately inspect the light resistance of clothing because it is possible to prevent the clothing that does not discolor when displayed in the store for a predetermined period from being erroneously determined to discolor.

The light-shielding portion 40 is not limited to the configuration fixed to the clothing component S, but is fixed to the mounting surface 21 and is configured so that the clothing component S can be inserted between the light-shielding portion 40 and the mounting surface 21. You may. The light-shielding portion 40 is fixed to the mounting surface 21 in a U-shaped region of the edge portion of the light-shielding portion 40, for example. Then, the clothing component S is inserted into a region of the light-shielding portion 40 that is not fixed to the mounting surface 21. At this time, the light-shielding portion 40 has a function of fixing the clothing component S to the mounting surface 21. Even with the above-described configuration, it is possible to obtain an effect according to the above (1) to (7).

Further, since the clothing component S is lightweight, when the mounting surface 21 is rotated, the inspection result becomes inaccurate because the clothing component S deviates from the mounting position due to centrifugal force or air resistance. Further, the inspection may fail because the clothing component S comes off from the mounting surface 21. In the above-described configuration, the clothing component S is inserted between the light-shielding portion 40 fixed to the mounting surface 21 and the mounting surface 21, so that the clothing component S is fixed to the mounting surface 21. Is possible. As a result, the misalignment of the garment component S on the mounting surface 21 can be suppressed, and the inspection can be performed accurately and reliably. Further, by extracting the clothing component S inserted between the light-shielding portion 40 and the mounting surface 21, it is possible to quickly determine the degree of discoloration of the clothing component S that has been irradiated with light.

-The light source 30 is not limited to LED lighting. From the viewpoint of investigating the presence or absence of the influence of the lighting when the clothes are displayed in the store, the light source 30 having a relative spectral distribution similar to that of the lighting used in the store may be used. According to the above-described configuration, it is possible to inspect the light resistance of clothing displayed in a store in a short period of time.

Further, from the viewpoint of examining the influence of light on the wool fabric, the relative intensity in the spectral distribution of light having a wavelength of 425 nm is higher than that of a light source equal to the lighting used in the store or the lighting used in the store. It may be a light source. According to the above-described configuration, it is possible to inspect the wool fabric displayed in the store for bleaching by light having a wavelength of 425 nm in a short period of time.

The photochromic inspection apparatus includes a plurality of types of light sources having different relative spectral distributions from each other, and two or more types of light sources may be used in combination. According to the above configuration, even when a plurality of types of lighting are used simultaneously in one store, the clothes displayed in the store are irradiated by combining the lights emitted from the plurality of types of light sources. It is possible to reproduce the light and inspect the light resistance of clothing displayed in the store in a short period of time.

-The light discoloration inspection device absorbs light of a part of wavelength from the light emitted from the light source 30, so that the relative spectral distribution of the light emitted to the clothing component S becomes the same as the lighting used in the store. An absorption filter may be provided. According to the above-described configuration, even if the lighting used differs depending on the store, the light radiated to the clothes displayed in the store is reproduced, and the light resistance of the clothes displayed in the store is short-term. It becomes possible to inspect with.

10 ... dark room, 20 ... stand, 21 ... mounting surface, 30 ... light source, 40 ... shading part, S ... clothing composition, L ... straight line.

The present invention relates to a photochromic inspection method .

An object of the present invention is to provide a photochromic inspection method capable of inspecting the light resistance of clothing in a short period of time.

Photochromic test method for solving the aforementioned problems is a photochromic inspection method for inspecting the influence of light on garment on display in a store, a dark room, and the base which is located inside the darkroom, positioned inside the darkroom using a light source that, said platform has a mounting surface for mounting a garment structure composing the clothing, the light source emits light to said garment construct and the mounting surface, wherein The irradiation amount of the short wavelength light received by the clothing displayed in the store during a predetermined period is defined as the integrated irradiation amount, and the irradiation amount of the short wavelength light received by the clothing component during a period shorter than the predetermined period is equal to the integrated irradiation amount. Light is emitted from the light source so as to be .

According to the above-mentioned method, it is possible to confirm whether or not the clothes are affected by the lighting when the clothes are displayed in the store for a predetermined period in an inspection period shorter than the predetermined period.
In the photo-discoloration inspection method , the table may be rotated by a drive unit with a straight line passing through the center of the above-mentioned mounting surface and perpendicular to the above-mentioned mounting surface as a rotation axis.

According to the above-described configuration, it is possible to perform a more accurate inspection by reducing the unevenness of light irradiation due to the difference in position on the mounting surface.
In the photo-discoloration inspection method , a part of the clothing component may be covered with a light-shielding portion to suppress irradiation of the clothing component with light .

In the photo-discoloration inspection method , the light-shielding portion may fix the clothing component to the above-mentioned mounting surface.
According to the above-described configuration, by fixing the garment component to the mounting surface, the position deviation of the garment component from the mounting surface can be suppressed, and the inspection can be performed accurately and reliably.

[Light discoloration inspection device]
Hereinafter, the configurations of the photochromic inspection apparatus and the photochromic inspection method in the present invention will be described with reference to FIGS. 1 and 2.

Claims (5)

A photo-discoloration inspection device that inspects the effects of light on clothing displayed in stores.
In the darkroom
The table located inside the darkroom and
With a light source located inside the darkroom
The table has a mounting surface on which the clothing components constituting the clothing are placed.
The light source irradiates the clothing structure and the above-mentioned mounting surface with light containing short wavelength light.
An optical discoloration inspection apparatus in which the amount of short-wavelength light radiated from the light source to the clothing structure per hour is larger than the amount of short-wavelength light radiated from the light source per hour at the store. The photocolor change inspection apparatus according to claim 1, further comprising a drive unit that rotates the table with a straight line perpendicular to the above-mentioned place surface as a rotation axis passing through the center of the above-mentioned place surface. The photocolor change inspection apparatus according to claim 1 or 2, further comprising a light-shielding portion that covers a part of the clothing component and suppresses irradiation of the clothing component with light. The light discoloration inspection device according to claim 3, wherein the light-shielding portion fixes the clothing component to the above-mentioned mounting surface. It is a photo-discoloration inspection method that inspects the effect of light on clothing displayed in stores.
In the darkroom
The table located inside the darkroom and
Using a light source located inside the darkroom
The table has a mounting surface on which the clothing components constituting the clothing are placed.
The light source irradiates the garment component and the above-mentioned mounting surface with light.
The irradiation amount of short wavelength light received by the clothing displayed in the store during a predetermined period is defined as the integrated irradiation amount.
A light discoloration inspection method of irradiating light from the light source so that the irradiation amount of short wavelength light received by the clothing component is equal to or more than the integrated irradiation amount in a period shorter than the predetermined period.