JP5200830B2 - Transmission inspection apparatus and transmission inspection method - Google Patents
Transmission inspection apparatus and transmission inspection method Download PDFInfo
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- JP5200830B2 JP5200830B2 JP2008252414A JP2008252414A JP5200830B2 JP 5200830 B2 JP5200830 B2 JP 5200830B2 JP 2008252414 A JP2008252414 A JP 2008252414A JP 2008252414 A JP2008252414 A JP 2008252414A JP 5200830 B2 JP5200830 B2 JP 5200830B2
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Description
本発明は、シート材の搬送経路でシート材の光の透過状態を検査する透過検査装置及び透過検査方法に関する。 The present invention relates to a transmission inspection apparatus and a transmission inspection method for inspecting a light transmission state of a sheet material in a sheet material conveyance path.
シート材の搬送経路でシート材の光の透過状態を検査する透過検査装置や透過検査方法が知られている。
例えば、用紙、フィルム等のロール状連続シート材を製造する製造工程において、シート材の欠陥を検査する装置は、透過検査用の照明装置（光源）及びＣＣＤ（Charge Coupled Device）カメラ（受光体）を備えており、これらをシート材の搬送経路を挟んで対向状に配置して構成される。そして、シート材の一方の面に照明装置から光を照射し、シート材の他方の面における透過光量をＣＣＤカメラで受光撮像し、撮像した画像を画像濃度として計測し、閾値となる画像濃度との濃度比較をすることにより欠陥検査を実現している（例えば、特許文献１、２参照）。
2. Description of the Related Art A transmission inspection apparatus and a transmission inspection method for inspecting a light transmission state of a sheet material through a sheet material conveyance path are known.
For example, in a manufacturing process for producing a roll-like continuous sheet material such as paper or film, an apparatus for inspecting a defect of the sheet material includes an illumination device (light source) for transmission inspection and a CCD (Charge Coupled Device) camera (photoreceptor). These are arranged so as to face each other across the sheet material conveyance path. Then, one surface of the sheet material is irradiated with light from the illuminating device, the amount of transmitted light on the other surface of the sheet material is received and imaged by a CCD camera, the captured image is measured as an image density, The defect inspection is realized by comparing the concentrations of the two (see, for example, Patent Documents 1 and 2).
図４は、この種の透過光を利用したシート材の検査装置（透過検査装置）の側面図である。
この図に示すように、透過検査装置１００では、複数のローラ（搬送駆動ローラ、ガイドローラ、テンションローラ等）１０１、１０２でシート材を搬送ガイドし、ローラ１０１、１０２間でシート材Ｓの透過光量を検査している。
この場合、シート材Ｓの表裏面のうち、例えば表側にＣＣＤカメラ１０３、裏側に光源１０４を設置することになるが、ＣＣＤカメラ１０３及び光源１０４は、それぞれシート材Ｓと接触しないように、シート材Ｓとの間にギャップを確保する必要がある。
なお、図４に符号１０５として示される部材は光源用レンズ・フィルタであり、符号１０６として示される部材はカメラ用レンズ・フィルタである。
FIG. 4 is a side view of a sheet material inspection apparatus (transmission inspection apparatus) using this type of transmitted light.
As shown in this figure, in the transmission inspection apparatus 100, a sheet material is conveyed and guided by a plurality of rollers (conveying drive rollers, guide rollers, tension rollers, etc.) 101 and 102, and the sheet material S is transmitted between the rollers 101 and 102. The light intensity is inspected.
In this case, among the front and back surfaces of the sheet material S, for example, the CCD camera 103 is installed on the front side and the light source 104 is installed on the back side, but the CCD camera 103 and the light source 104 are not in contact with the sheet material S, respectively. It is necessary to secure a gap with the material S.
4 is a light source lens / filter, and the member 106 is a camera lens / filter.
しかしながら、図４に示した透過検査装置１００のように、光源１０４とシート材Ｓとの間にギャップが存在すると、散乱光、反射光等の外来光による影響が発生しやすくなり、透過検査の精度が低下するという問題がある。
また、上記の透過検査装置１００では、搬送時におけるシート材Ｓの挙動を抑えるために、ローラ１０１、１０２間の距離等を調整しているが、搬送時におけるシート材Ｓのバタツキを完全に抑えることはできない。このため、ＣＣＤカメラ１０３が撮像する画像の濃度がシート材Ｓのバタツキにより変化し、透過検査の精度が低下するという問題がある。
However, when there is a gap between the light source 104 and the sheet material S as in the transmission inspection apparatus 100 shown in FIG. 4, the influence of external light such as scattered light and reflected light is likely to occur, and transmission inspection is performed. There is a problem that accuracy decreases.
In the transmission inspection apparatus 100 described above, the distance between the rollers 101 and 102 is adjusted in order to suppress the behavior of the sheet material S during conveyance. However, the fluttering of the sheet material S during conveyance is completely suppressed. It is not possible. For this reason, there is a problem that the density of the image captured by the CCD camera 103 changes due to the flickering of the sheet material S, and the accuracy of the transmission inspection decreases.
本発明は、上記の事情にかんがみなされたものであり、散乱光、反射光等の外来光による影響や、シート材のバタツキによる影響を抑制し、透過検査の精度を向上させることができる透過検査装置及び透過検査方法を提供することを目的とする。 The present invention has been considered in view of the above circumstances, and is capable of suppressing the influence of extraneous light such as scattered light and reflected light, and the influence of sheet material flutter, and can improve the accuracy of the transmission inspection. An object is to provide a device and a transmission inspection method.
上記目的を達成するため本発明の透過検査装置は、シート材の搬送経路でシート材の光の透過状態を検査する透過検査装置であって、シート材が外周面部に当接するように前記搬送経路に配置され、外周面部に設けられる発光部からシート材に光を照射する回転体と、前記回転体におけるシート材当接領域の対向位置に配置され、シート材の透過光を受光する受光体と、を備える構成としてある。 In order to achieve the above object, the transmission inspection apparatus of the present invention is a transmission inspection apparatus for inspecting the light transmission state of a sheet material in the sheet material conveyance path, and the conveyance path so that the sheet material abuts on the outer peripheral surface portion. A rotating body that irradiates the sheet material with light from a light emitting portion provided on the outer peripheral surface portion, and a light receiving body that is disposed at a position opposite to the sheet material contact area in the rotating body and that receives the transmitted light of the sheet material. Are provided.
また、上記目的を達成するため本発明の透過検査方法は、シート材の搬送経路でシート材の光の透過状態を検査する透過検査方法であって、シート材が外周面部に当接するように前記搬送経路に回転体を配置するとともに、前記回転体におけるシート材当接領域の対向位置に受光体を配置し、前記回転体の外周面部に設けた発光部からシート材に光を照射し、その透過光を前記受光体で受光する方法としてある。 In order to achieve the above object, the transmission inspection method of the present invention is a transmission inspection method for inspecting the light transmission state of the sheet material in the sheet material conveyance path, wherein the sheet material is in contact with the outer peripheral surface portion. A rotating body is disposed in the conveyance path, a light receiving body is disposed at a position opposite to the sheet material contact area in the rotating body, and light is emitted to the sheet material from a light emitting portion provided on an outer peripheral surface portion of the rotating body. In this method, transmitted light is received by the light receiver.
本発明によれば、シート材が当接する回転体の外周面部を発光部とし、該発光部からギャップを介さずにシート材に光を照射することができ、ギャップを介してシート材に光を照射していた場合と比較して、散乱光、反射光等の外来光による影響を抑制し、透過検査の精度を向上させることができる。
また、受光体は、回転体におけるシート材当接領域の対向位置でシート材の透過光を受光するので、バタツキのない状態でシート材の透過検査を行うことができ、その結果、シート材のバタツキによる検査精度の低下を回避し、透過検査の精度を更に向上させることができる。
According to the present invention, the outer peripheral surface portion of the rotating body with which the sheet material abuts can be used as a light emitting portion, and light can be emitted from the light emitting portion to the sheet material without passing through the gap. Compared with the case of irradiation, the influence of extraneous light such as scattered light and reflected light can be suppressed, and the accuracy of the transmission inspection can be improved.
Further, since the photoreceptor receives the transmitted light of the sheet material at a position opposite to the sheet material contact area in the rotating body, the sheet material can be inspected for transmission without fluttering. A decrease in inspection accuracy due to fluttering can be avoided, and the accuracy of transmission inspection can be further improved.
以下、本発明の好ましい実施形態について、図面を参照して説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
［第一実施形態］
まず、本発明の基本的な構成を示す第一実施形態について、図１を参照して説明する。
図１（ａ）は、本発明の第一実施形態に係る透過検査装置の側面図である。
この図に示すように、第一実施形態の透過検査装置１Ａは、ロール状連続用紙等のシート材Ｓを製造する製造工程において、シート材Ｓの光の透過状態を検査するものであって、ローラ（回転体）２と、ＣＣＤカメラ（受光体）３とを備えて構成されている。
[First embodiment]
First, a first embodiment showing a basic configuration of the present invention will be described with reference to FIG.
FIG. 1A is a side view of a transmission inspection apparatus according to the first embodiment of the present invention.
As shown in this figure, the transmission inspection apparatus 1A of the first embodiment inspects the light transmission state of the sheet material S in the manufacturing process of manufacturing the sheet material S such as a roll-shaped continuous paper, A roller (rotating body) 2 and a CCD camera (light receiving body) 3 are provided.
ローラ２は、自由回転又は強制回転される回転体であり、シート材Ｓが外周面部に当接するようにシート材Ｓの搬送経路に配置される。
例えば、ローラ２は、強制回転によりシート材Ｓを搬送する搬送駆動ローラ、自由回転によりシート材Ｓを搬送ガイドするガイドローラ、シート材Ｓに張力を与えるテンションローラ等で構成することができる。
The roller 2 is a rotating body that is freely rotated or forcibly rotated, and is disposed in the conveyance path of the sheet material S so that the sheet material S contacts the outer peripheral surface portion.
For example, the roller 2 can be configured by a conveyance driving roller that conveys the sheet material S by forced rotation, a guide roller that conveys and guides the sheet material S by free rotation, a tension roller that applies tension to the sheet material S, and the like.
また、ローラ２の外周面部には、シート材Ｓに光を照射する発光部４が設けられている。
例えば、ローラ２の外周面部に有機ＥＬ（Electro-Luminescence）フィルムライト等の発光素材を貼り付けて発光部４とする。
A light emitting unit 4 that irradiates the sheet material S with light is provided on the outer peripheral surface of the roller 2.
For example, a light emitting material such as an organic EL (Electro-Luminescence) film light is attached to the outer peripheral surface of the roller 2 to form the light emitting unit 4.
ＣＣＤカメラ３は、ローラ２におけるシート材当接領域の対向位置に配置され、シート材Ｓの透過光を受光撮像する。
また、ＣＣＤカメラ３には、シート材Ｓとの距離や使用環境に応じて選定されたカメラ用レンズ・フィルタ５が取り付けられており、このカメラ用レンズ・フィルタ５を介してシート材Ｓの透過光が受光撮像される。
The CCD camera 3 is disposed at a position opposite to the sheet material contact area in the roller 2 and receives and images the transmitted light of the sheet material S.
The CCD camera 3 is provided with a camera lens / filter 5 selected according to the distance from the sheet material S and the usage environment, and the sheet material S is transmitted through the camera lens / filter 5. Light is received and imaged.
なお、図１（ｂ）に示すように、ＣＣＤカメラ３に備えられるカメラ用レンズ・フィルタ５は省略することができる。すなわち、カメラ用レンズ・フィルタ５は、例えばシート材Ｓとの距離や使用環境、ＣＣＤカメラ３の性能等に応じて、適宜省略してもよく、また、カメラ用レンズ・フィルタ５がＣＣＤカメラ３に内蔵等されて一体的に設けられていてもよい。従って、カメラ用レンズ・フィルタ５が設けられていないことによって本発明の成立が妨げられることはない。 As shown in FIG. 1B, the camera lens / filter 5 provided in the CCD camera 3 can be omitted. That is, the camera lens / filter 5 may be omitted as appropriate depending on, for example, the distance from the sheet material S, the usage environment, the performance of the CCD camera 3, and the camera lens / filter 5 may be omitted. Or may be provided integrally. Accordingly, the absence of the camera lens filter 5 does not hinder the establishment of the present invention.
つぎに、以上のような構成からなる本実施形態の透過検査装置１Ａによるシート材Ｓの透過検査方法について説明する。
まず、シート材Ｓの搬送経路でシート材Ｓの光の透過状態を検査する場合は、シート材Ｓが外周面部に当接するように前記搬送経路にローラ２を配置するとともに、ローラ２におけるシート材当接領域の対向位置にＣＣＤカメラ３を配置する。
そして、ローラ２の外周面部に設けた発光部４からシート材Ｓに光を照射し、その透過光をＣＣＤカメラ３で受光撮像する。
その後、ＣＣＤカメラ３が撮像した画像を画像濃度として計測し、閾値となる画像濃度との濃度比較をすることにより、シート材Ｓの欠陥検査が実現される。
Next, a transmission inspection method for the sheet material S by the transmission inspection apparatus 1A of the present embodiment configured as described above will be described.
First, when inspecting the light transmission state of the sheet material S in the conveyance path of the sheet material S, the roller 2 is disposed in the conveyance path so that the sheet material S abuts on the outer peripheral surface portion, and the sheet material in the roller 2 is disposed. The CCD camera 3 is disposed at a position facing the contact area.
The sheet material S is irradiated with light from the light emitting portion 4 provided on the outer peripheral surface portion of the roller 2, and the transmitted light is received and imaged by the CCD camera 3.
Thereafter, an image captured by the CCD camera 3 is measured as an image density, and the defect comparison of the sheet material S is realized by comparing the density with an image density serving as a threshold value.
以上のようにして、本発明の第一実施形態によれば、シート材Ｓの搬送経路でシート材Ｓの光の透過状態を検査する透過検査装置１Ａであって、シート材Ｓが外周面部に当接するように前記搬送経路に配置され、外周面部に設けられる発光部４からシート材Ｓに光を照射するローラ２と、ローラ２におけるシート材当接領域の対向位置に配置され、シート材Ｓの透過光を受光するＣＣＤカメラ３とを備える構成としてあるので、透過検査の精度を向上させることができる。 As described above, according to the first embodiment of the present invention, the transmission inspection apparatus 1A inspects the light transmission state of the sheet material S in the conveyance path of the sheet material S, and the sheet material S is disposed on the outer peripheral surface portion. The sheet 2 is disposed on the conveying path so as to be in contact with the roller 2 that irradiates the sheet material S with light from the light emitting unit 4 provided on the outer peripheral surface, and the sheet material S is opposed to the sheet material contact area in the roller 2. Therefore, it is possible to improve the accuracy of the transmission inspection.
すなわち、透過検査装置１Ａによれば、シート材Ｓが当接するローラ２の外周面部を発光部４とし、該発光部４からギャップを介さずにシート材Ｓに光を照射するので、ギャップを介してシート材Ｓに光を照射していた場合と比較して、散乱光、反射光等の外来光による影響を抑制し、透過検査の精度を向上させることができる。 That is, according to the transmission inspection apparatus 1A, the outer peripheral surface portion of the roller 2 with which the sheet material S abuts is the light emitting portion 4, and the light is emitted from the light emitting portion 4 to the sheet material S without passing through the gap. Compared with the case where the sheet material S is irradiated with light, the influence of extraneous light such as scattered light and reflected light can be suppressed, and the accuracy of the transmission inspection can be improved.
また、ＣＣＤカメラ３は、ローラ２におけるシート材当接領域の対向位置でシート材Ｓの透過光を受光するので、バタツキのない状態でシート材Ｓの透過検査を行うことができ、その結果、シート材Ｓのバタツキによる検査精度の低下を回避し、透過検査の精度を更に向上させることができる。 Further, since the CCD camera 3 receives the transmitted light of the sheet material S at a position opposite to the sheet material contact area in the roller 2, it is possible to perform a transmission inspection of the sheet material S without any fluttering. A decrease in inspection accuracy due to fluttering of the sheet material S can be avoided, and the accuracy of the transmission inspection can be further improved.
［第二実施形態］
つぎに、本発明の第二実施形態に係る透過検査装置１Ｂについて、図２及び図３を参照して説明する。
なお、第一実施形態と共通の構成については、第一実施形態と同一の符号を付与し、第一実施形態の説明を援用する。
[Second Embodiment]
Next, a transmission inspection apparatus 1B according to a second embodiment of the present invention will be described with reference to FIGS.
In addition, about the structure which is common with 1st embodiment, the code | symbol same as 1st embodiment is provided and description of 1st embodiment is used.
図２は、本発明の第二実施形態に係る透過検査装置の側面図、図３は、本発明の第二実施形態に係る回転体の断面図である。
これらの図に示すように、本発明の第二実施形態に係る透過検査装置１Ｂは、ローラ２の外周面部に設けられる発光部４が、光源６の光で励起される蓄光性夜光顔料を用いて形成され、蓄光性夜光顔料から生じる光をシート材Ｓに照射する点が第一実施形態の透過検査装置１Ａと相違している。
FIG. 2 is a side view of a transmission inspection apparatus according to the second embodiment of the present invention, and FIG. 3 is a cross-sectional view of a rotating body according to the second embodiment of the present invention.
As shown in these drawings, in the transmission inspection apparatus 1B according to the second embodiment of the present invention, the light emitting part 4 provided on the outer peripheral surface part of the roller 2 uses a luminous phosphorescent pigment that is excited by the light of the light source 6. The point which irradiates the sheet | seat material S with the light which arises and is produced from the luminous phosphorescent pigment is different from the transmission inspection apparatus 1A of the first embodiment.
このような第二実施形態の透過検査装置１Ｂによれば、第一実施形態と同様の効果が得られるだけでなく、第一実施形態に比してローラ２の構造を簡略化することが可能になる。
すなわち、第一実施形態のようにローラ２の発光部４を有機ＥＬフィルムライト等で構成した場合、回転体であるローラ２に対して電源供給が必要になるため、スリップリングを介してローラ２に電源を供給したり、ローラ２に蓄電式の電源を設置する等の構造が必要となる。
これに対して、第二実施形態によれば、ローラ２に対して電源供給を行う必要がないので、ローラ２の構造を簡略化できるだけでなく、透過検査装置１Ｂの設置性や保守性も向上させることができる。
According to such a transmission inspection apparatus 1B of the second embodiment, not only the same effect as the first embodiment can be obtained, but also the structure of the roller 2 can be simplified as compared with the first embodiment. become.
That is, when the light-emitting portion 4 of the roller 2 is configured by an organic EL film light or the like as in the first embodiment, it is necessary to supply power to the roller 2 that is a rotating body. A structure such as supplying power to the roller or installing a storage type power source on the roller 2 is required.
On the other hand, according to the second embodiment, since it is not necessary to supply power to the roller 2, not only the structure of the roller 2 can be simplified, but also the installation property and maintainability of the transmission inspection device 1B are improved. Can be made.
なお、夜光顔料には、自発光性と蓄光性の２種類のものがあり、自発光性夜光顔料は、放射線によって長時間発光することが可能であるが、僅かながらも放射性物質を含んでいるため、用途の制限があり、生産や廃棄なども厳しい管理が必要となる。これに対し、蓄光性夜光顔料は、放射性物質を含んでいない代わりに、長時間発光は不可能とされ、実用性の低いものであったが、近年、夜光顔料として飛躍的に性能が改善された蓄光性夜光顔料が開発されてきている（例えば、特許第２５４３８２５号公報参照）。 There are two types of nocturnal pigments: self-luminous and phosphorescent. Self-luminous nocturnal pigments can emit light for a long time by radiation, but contain a slight amount of radioactive material. For this reason, there are restrictions on applications, and strict management is required for production and disposal. On the other hand, phosphorescent luminescent pigments are not practical because they do not contain radioactive materials, and are not practical for a long time, but in recent years the performance has been dramatically improved as luminescent pigments. Luminous luminous pigments have been developed (see, for example, Japanese Patent No. 2543825).
上記の改善された蓄光性夜光顔料は、従来品と比較して初輝度や残光輝度について飛躍的な光量をもつ物質であり、また、光の吸収、発光を何回でも繰り返すことが可能で、主成分とした酸化物は、自然界で安定であり、耐光性に優れている。さらには、暗闇で長時間発光し、残光、輝度が従来品の１０倍以上、照射する光が強いほど良く光り、耐光性、耐候性に優れ屋外使用が可能であり、化学的安定性が高く環境に強く、励起する光の波長範囲が広い等の特徴を有している。
このような蓄光性夜光顔料をローラ２の外周面部に塗布したり、あるいは、蓄光性夜光顔料が含まれるフィルムやシートをローラ２の外周面部に貼り付けることにより、ローラ２の外周面部に発光部４を形成することができる。
The improved luminous phosphorescent pigment is a substance with a dramatic light intensity in terms of initial luminance and afterglow luminance compared to conventional products, and can absorb and emit light any number of times. The oxide as the main component is stable in nature and has excellent light resistance. Furthermore, it emits light in the dark for a long time, and its afterglow and brightness are more than 10 times that of conventional products. The stronger the light it shines, the better it shines, and it can be used outdoors and has excellent chemical stability. It is highly environmentally friendly and has a wide wavelength range for exciting light.
A light emitting portion is applied to the outer peripheral surface portion of the roller 2 by applying such a luminous luminous pigment to the outer peripheral surface portion of the roller 2 or by sticking a film or sheet containing the luminous luminous pigment to the outer peripheral surface portion of the roller 2. 4 can be formed.
蓄光性夜光顔料を用いて形成された発光部４は、コーティング用透明素材７を用いてコーティングすることが好ましい。
例えば、透明な液体からなるコーティング材を蓄光性夜光顔料の上に塗布して硬化させたり、透明フィルムからなるコーティング材を蓄光性夜光顔料の上に貼り付ける。このようにすると、蓄光性夜光顔料からなる発光部４がコーティング用透明素材７で保護されることになるので、シート材Ｓとの当接によりローラ２の外周面部に生じる摩擦等で蓄光性夜光顔料が劣化することを抑制し、長期に亘って良好な発光状態を維持することができる。
It is preferable to coat the light emitting part 4 formed using the luminous phosphorescent pigment using the transparent material 7 for coating.
For example, a coating material made of a transparent liquid is applied on the luminous phosphorescent pigment and cured, or a coating material made of a transparent film is stuck on the luminous phosphorescent pigment. In this case, the light emitting portion 4 made of the luminous phosphorescent pigment is protected by the coating transparent material 7, so that the luminous luminous light is caused by friction generated on the outer peripheral surface portion of the roller 2 by contact with the sheet material S. It is possible to suppress deterioration of the pigment and maintain a good light emission state over a long period of time.
光源６は、一般的な蛍光灯、ＬＥＤ（Light Emitting Diode）光源、ハロゲンランプ、キセノンランプ等により構成され、電線による電源供給に応じて発光する。光源６の光は、ローラ２における非シート材当接領域に照射されるが、ローラ２の回転によりローラ２の外周面全域に照射される。このような構造から、ローラ２の外周面全域に設けられた蓄光性夜光顔料（発光部４）が光源６の光により励起されて発光することになる。 The light source 6 includes a general fluorescent lamp, an LED (Light Emitting Diode) light source, a halogen lamp, a xenon lamp, and the like, and emits light in response to power supply by an electric wire. The light from the light source 6 is applied to the non-sheet material contact area of the roller 2, but is applied to the entire outer peripheral surface of the roller 2 by the rotation of the roller 2. From such a structure, the luminous luminous pigment (light emitting part 4) provided on the entire outer peripheral surface of the roller 2 is excited by the light from the light source 6 to emit light.
光源６の位置は、ローラ２における非シート材当接領域の対向位置とする必要があるが、さらには、ローラ２を挟んでＣＣＤカメラ３の反対側であることが好ましい。このようにすると、光源６の光がローラ２で遮られ、ＣＣＤカメラ３に直接到達しないので、光源６からの直接光による影響を抑制し、検査精度を向上させることができる。
なお、光源６には、ローラ２との距離や使用環境に応じて選定された光源用レンズ・フィルタ８が取り付けられており、この光源用レンズ・フィルタ８を介してローラ２の蓄光性夜光顔料（発光部４）に光が照射される。
The position of the light source 6 needs to be a position opposite to the non-sheet material contact area in the roller 2, but is preferably on the opposite side of the CCD camera 3 across the roller 2. In this way, the light from the light source 6 is blocked by the roller 2 and does not reach the CCD camera 3 directly, so that the influence of the direct light from the light source 6 can be suppressed and the inspection accuracy can be improved.
The light source 6 is provided with a light source lens / filter 8 selected according to the distance to the roller 2 and the use environment, and the luminous luminous pigment of the roller 2 is passed through the light source lens / filter 8. Light is emitted to the (light emitting unit 4).
また、光源６やＣＣＤカメラ３は、その周囲を遮光カバー９、１０で覆うことが好ましい。
例えば、光源６の周囲（本実施形態では光照射方向を除く５面）を箱状の光源用遮光カバー９で覆うとともに、ＣＣＤカメラ３の周囲（本実施形態では受光方向を除く５面）をカメラ用遮光カバー（受光体用遮光カバー）１０で覆う。このようにすると、遮光カバー９、１０によって外来光が遮断されるので、外来光の影響を抑制し、検査精度を更に向上させることができる。
The light source 6 and the CCD camera 3 are preferably covered with light shielding covers 9 and 10.
For example, the periphery of the light source 6 (5 surfaces excluding the light irradiation direction in this embodiment) is covered with a box-shaped light-shielding cover 9 for the light source, and the periphery of the CCD camera 3 (5 surfaces excluding the light receiving direction in this embodiment) is covered. Cover with a camera shading cover (light-shielding cover for photoreceptor) 10. In this way, since the extraneous light is blocked by the light shielding covers 9 and 10, the influence of the extraneous light can be suppressed and the inspection accuracy can be further improved.
以上のように、本発明の第二実施形態によれば、ローラ２の外周面部に設けられる発光部４は、光源６の光で励起される蓄光性夜光顔料を用いて形成され、蓄光性夜光顔料から生じる光をシート材Ｓに照射するので、第一実施形態に比してローラ２の構造を簡略化することが可能になる。 As described above, according to the second embodiment of the present invention, the light emitting portion 4 provided on the outer peripheral surface portion of the roller 2 is formed using the luminous phosphorescent pigment excited by the light of the light source 6, and the luminous phosphorescence. Since the sheet material S is irradiated with light generated from the pigment, the structure of the roller 2 can be simplified as compared with the first embodiment.
すなわち、第一実施形態のようにローラ２の発光部４を有機ＥＬフィルムライト等で構成した場合、回転体であるローラ２に対して電源供給が必要になるため、スリップリングを介してローラ２に電源を供給したり、ローラ２に蓄電式の電源を設置する等の構造が必要となる。
これに対して、第二実施形態によれば、ローラ２に対して電源供給を行う必要がないので、ローラ２の構造を簡略化できるだけでなく、透過検査装置１Ｂの設置性や保守性も向上させることができる。
また、発光部４は、蓄光性夜光顔料をコーティングするコーティング用透明素材７を有するので、シート材Ｓとの当接によりローラ２の外周面部に生じる摩擦等で蓄光性夜光顔料が劣化することを抑制し、長期に亘って良好な発光状態を維持することができる。
That is, when the light-emitting portion 4 of the roller 2 is configured by an organic EL film light or the like as in the first embodiment, it is necessary to supply power to the roller 2 that is a rotating body. A structure such as supplying power to the roller or installing a storage type power source on the roller 2 is required.
On the other hand, according to the second embodiment, since it is not necessary to supply power to the roller 2, not only the structure of the roller 2 can be simplified, but also the installation property and maintainability of the transmission inspection device 1B are improved. Can be made.
Moreover, since the light emission part 4 has the transparent material 7 for a coating which coats a luminous phosphorescent pigment, a phosphorescent luminous pigment deteriorates by the friction etc. which arise in the outer peripheral surface part of the roller 2 by contact | abutting with the sheet | seat material S. It can suppress and can maintain a favorable luminescent state over a long period of time.
また、光源６は、ローラ２を挟んでＣＣＤカメラ３の反対側に配置されるので、光源６の光がローラ２で遮られて、ＣＣＤカメラ３に直接到達しないこととなり、その結果、光源６からの直接光による影響を抑制し、検査精度を向上させることができる。
また、光源６やＣＣＤカメラ３は、その周囲が遮光カバー９、１０で覆われているので、遮光カバー９、１０によって外来光を遮断することができ、その結果、外来光の影響を抑制し、検査精度を更に向上させることができる。
Since the light source 6 is disposed on the opposite side of the CCD camera 3 with the roller 2 interposed therebetween, the light from the light source 6 is blocked by the roller 2 and does not reach the CCD camera 3 directly. As a result, the light source 6 It is possible to suppress the influence of direct light from the light and improve the inspection accuracy.
Further, since the periphery of the light source 6 and the CCD camera 3 is covered with the light shielding covers 9, 10, the external light can be blocked by the light shielding covers 9, 10, thereby suppressing the influence of the external light. The inspection accuracy can be further improved.
以上、本発明の透過検査装置及び透過検査方法について、好ましい実施形態を示して説明したが、本発明にかかる透過検査装置及び透過検査方法は、上述した実施形態にのみ限定されるものではなく、本発明の範囲で種々の変更実施が可能であることは言うまでもない。
すなわち、本発明は、上述した第一実施形態及び前記第二実施形態に限定されず、特許請求の範囲を逸脱しない限り、任意の変更を加えることができる。例えば、受光体は、ＣＣＤカメラに限定されるものではなく、任意の受光素子を用いることができる。
The transmission inspection apparatus and the transmission inspection method of the present invention have been described with reference to the preferred embodiments, but the transmission inspection apparatus and the transmission inspection method according to the present invention are not limited to the above-described embodiments, It goes without saying that various modifications can be made within the scope of the present invention.
That is, the present invention is not limited to the first embodiment and the second embodiment described above, and can be arbitrarily modified without departing from the scope of the claims. For example, the photoreceptor is not limited to a CCD camera, and any light receiving element can be used.
本発明は、シート材の搬送経路でシート材の光の透過状態を検査する透過検査装置や透過検査方法に適用される。特に、用紙、フィルム等のロール状連続シート材を製造する製造工程において、シート材の欠陥を検査する装置として好適に用いることができる。 The present invention is applied to a transmission inspection apparatus and a transmission inspection method for inspecting a light transmission state of a sheet material in a sheet material conveyance path. In particular, it can be suitably used as an apparatus for inspecting defects in a sheet material in a production process for producing a roll-like continuous sheet material such as paper or film.
１Ａ 透過検査装置
１Ｂ 透過検査装置
２ ローラ
３ ＣＣＤカメラ
４ 発光部
５ カメラ用レンズ・フィルタ
６ 光源
７ コーティング用透明素材
８ 光源用レンズ・フィルタ
９ 光源用遮光カバー
１０ カメラ用遮光カバー
Ｓ シート材
DESCRIPTION OF SYMBOLS 1A Transmission inspection apparatus 1B Transmission inspection apparatus 2 Roller 3 CCD camera 4 Light emission part 5 Camera lens / filter 6 Light source 7 Coating transparent material 8 Light source lens / filter 9 Light source light shielding cover 10 Camera light shielding cover S Sheet material
Claims (2)
シート材が外周面部に当接するように前記搬送経路に配置され、外周面部に設けられる発光部からシート材に光を照射する回転体と、
前記回転体におけるシート材当接領域の対向位置に配置され、シート材の透過光を受光する受光体と、を備え、
前記発光部は、前記回転体の外周面全域に設けられた、光源の光で励起される蓄光性夜光顔料を用いて形成されるとともに、前記蓄光性夜光顔料の表面をコーティングするコーティング用素材を備え、
前記光源は、前記回転体を挟んで前記受光体の反対側に配置されるとともに、その周囲の少なくとも一部が遮光カバーで覆われ、当該遮光カバーで覆われた光源により、前記発光部の蓄光性夜光顔料が励起され、
前記受光体は、その周囲の少なくとも一部が遮光カバーで覆われ、当該遮光カバーで覆われた受光体により、前記シート材の透過光が受光される
ことを特徴とする透過検査装置。 A transmission inspection apparatus that inspects the light transmission state of the sheet material in the conveyance path of the sheet material,
A rotating body that is disposed in the transport path so that the sheet material contacts the outer peripheral surface portion, and irradiates the sheet material with light from a light emitting portion provided on the outer peripheral surface portion;
A light receiving body that is disposed at a position opposite to the sheet material contact area in the rotating body, and that receives light transmitted through the sheet material ;
The light emitting unit is formed using a luminous phosphorescent pigment that is provided over the entire outer peripheral surface of the rotating body and is excited by light from a light source, and a coating material that coats the surface of the luminous phosphorescent pigment. Prepared,
The light source is disposed on the opposite side of the light receiving body with the rotating body interposed therebetween, and at least a part of the periphery of the light source is covered with a light shielding cover, and the light storage of the light emitting unit is performed by the light source covered with the light shielding cover. Luminescent nocturnal pigment is excited,
At least a part of the periphery of the light receiving body is covered with a light shielding cover, and transmitted light of the sheet material is received by the light receiving body covered with the light shielding cover .
シート材が外周面部に当接するように前記搬送経路に回転体を配置するとともに、前記回転体におけるシート材当接領域の対向位置に受光体を配置し、
前記回転体の外周面部に設けた発光部からシート材に光を照射し、その透過光を前記受光体で受光するとともに、
前記発光部を、前記回転体の外周面全域に設けられた、光源の光で励起される蓄光性夜光顔料を用いて形成するとともに、前記蓄光性夜光顔料の表面をコーティング用素材によりコーティングし、
前記光源を、前記回転体を挟んで前記受光体の反対側に配置するとともに、その周囲の少なくとも一部を遮光カバーで覆い、当該遮光カバーで覆われた光源により、前記発光部の蓄光性夜光顔料を励起し、
前記受光体の周囲の少なくとも一部を遮光カバーで覆い、当該遮光カバーで覆われた受光体により、前記シート材の透過光を受光させる
ことを特徴とする透過検査方法。 A transmission inspection method for inspecting the light transmission state of a sheet material in a conveyance path of the sheet material,
A rotating body is arranged in the conveyance path so that the sheet material comes into contact with the outer peripheral surface portion, and a light receiving body is arranged at a position opposite to the sheet material contact area in the rotating body,
While irradiating the sheet material with light from the light emitting portion provided on the outer peripheral surface portion of the rotating body, and receiving the transmitted light with the light receiving body ,
The light emitting portion is formed using a luminous luminescent pigment provided on the entire outer peripheral surface of the rotating body and excited by light from a light source, and the surface of the luminous luminescent pigment is coated with a coating material,
The light source is disposed on the opposite side of the light receiving body with the rotating body interposed therebetween, and at least a part of the periphery of the light source is covered with a light shielding cover, and the luminous nightlight of the light emitting unit is covered by the light source covered with the light shielding cover. Excited pigment,
A transmission inspection method , wherein at least a part of the periphery of the light receiving body is covered with a light shielding cover, and the light transmitted through the sheet material is received by the light receiving body covered with the light shielding cover .
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