JP4502656B2 - Coating layer detection method and apparatus, and cylinder pasting method and apparatus using the same - Google Patents

Coating layer detection method and apparatus, and cylinder pasting method and apparatus using the same Download PDF

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JP4502656B2
JP4502656B2 JP2004038896A JP2004038896A JP4502656B2 JP 4502656 B2 JP4502656 B2 JP 4502656B2 JP 2004038896 A JP2004038896 A JP 2004038896A JP 2004038896 A JP2004038896 A JP 2004038896A JP 4502656 B2 JP4502656 B2 JP 4502656B2
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coating layer
film
light
cylinder
detecting
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JP2005224778A (en
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貴之 植木
浩三 三田
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Dai Nippon Printing Co Ltd
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本発明は、原反フィルムの幅方向の一部領域に帯状に形成した塗布層、例えば、軟包装分野で主に飲料、食油、化成品等が充填されるボトルへ外嵌装着される筒状のラベルを製造する工程などで、原反フィルムの幅方向の一部領域に接着液を連続的に帯状に塗布して形成した塗布層の有無を検知する技術に関する。 The present invention relates to a coating layer formed in a strip shape in a partial region in the width direction of a raw film, for example, a cylindrical shape that is externally attached to a bottle filled with beverages, edible oils, chemical products, etc. in the flexible packaging field. It is related with the technique which detects the presence or absence of the coating layer formed by apply | coating an adhesive liquid continuously in a partial area | region of the width direction of a raw film at the process etc. which manufacture this label.

従来、飲料等の容器に嵌装着されるラベルは、ポリエチレン、ポリプロピレン、ポリスチレン、ポリエステルフィルムなどから構成され、多くは筒状のラベルとして供給されている。これらのフィルムから作製されるラベルは、筒状とするために、原反フィルムの両端部の一方若しくは双方に接着液を塗布し、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とし、その後巻き取るという方法で作製している。ここで接着液には、ストレッチラベルにおいては接着剤が用いられ、シュリンクラベルにおいては溶剤（接着溶剤或いは溶着溶剤という）が用いられている。   Conventionally, a label fitted to a container such as a beverage is made of polyethylene, polypropylene, polystyrene, polyester film, and the like, and many are supplied as a cylindrical label. In order to make the label produced from these films into a cylindrical shape, an adhesive solution is applied to one or both ends of the original film, the both ends of the original film are overlapped, and the overlapping portion is joined. It is made by the method of making it cylindrical and then winding it. Here, as the adhesive liquid, an adhesive is used in the stretch label, and a solvent (referred to as an adhesive solvent or a welding solvent) is used in the shrink label.

しかしながら、上記した接着液は無色透明で、筒状加工工程で接着液が原反フィルムの端部に塗布されているか否かを確認することはきわめて困難であった。また、連続塗布速度も早く、目視等による確認はほとんど不可能であった。   However, the above-described adhesive liquid is colorless and transparent, and it has been extremely difficult to confirm whether or not the adhesive liquid is applied to the end portion of the raw film in the cylindrical processing step. In addition, the continuous application speed was fast, and visual confirmation was almost impossible.

そこで上記問題を解決する目的で、接着液の中へ蛍光染料を添加しておき、蛍光染料を混入した接着液を原反フィルムに塗布し、その塗布部分を蛍光検知装置によって検知することで、接着液の塗布状態を確認、検知する方法が提案されている（例えば、特開２００２−２３９４４８号公報参照）。しかし、この方法は塗布の状態を明確に確認、検知できるものの、蛍光染料を使用していることから人体への影響が大きく懸念され、食品及び飲料用途には向かないという問題点があった。
特開２００２−２３９４４８号公報参照 Therefore, for the purpose of solving the above problem, a fluorescent dye is added to the adhesive liquid, the adhesive liquid mixed with the fluorescent dye is applied to the original film, and the application part is detected by the fluorescence detection device. A method for confirming and detecting the application state of the adhesive liquid has been proposed (see, for example, JP-A-2002-239448). However, although this method can clearly check and detect the state of application, since it uses a fluorescent dye, there is a great concern about the influence on the human body and there is a problem that it is not suitable for food and beverage applications.
See JP 2002-239448 A

本発明はかかる問題点に鑑みてなされたもので、接着液を塗布して形成した塗布層のように、透明で識別しにくい塗布層であってもその塗布層の有無を、原反フィルムの走行中に検知することを可能とする塗布層検知方法及び装置を提供することを課題とする。   The present invention has been made in view of such problems, and the presence or absence of the coating layer is determined even if the coating layer is transparent and difficult to identify, such as a coating layer formed by applying an adhesive liquid. It is an object of the present invention to provide a coating layer detection method and apparatus that can be detected during traveling.

本発明者らは上記課題を解決すべく種々検討の結果、原反フィルムの幅方向の一部領域に帯状に塗布されている塗布層を検知する方法として、原反フィルムの、少なくとも前記塗布層の全幅を含んだ塗布層形成領域に光を照射した時に、その反射光の方向が塗布層を通過する際の屈折や表面での反射によって、塗布層が無い場合とは異なることに着目し、塗布層がある場合の反射光の光路上に、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成された受光手段を配置し、その受光手段の光入射を検知した画素の個数を測定することで塗布層の有無を判断しうることを見出し、本発明を完成した。すなわち、本願請求項１に係る発明に係る塗布層検知方法は、連続的に走行している原反フィルムの幅方向の一部領域に、走行方向に延びる帯状に塗布されている塗布層の有無を検知する塗布層検知方法であって、前記連続的に走行している原反フィルムの、少なくとも前記塗布層の全幅を含んだ塗布層形成領域を、原反フィルムの走行方向にほぼ直角な面内で且つ原反フィルムに対して傾斜した方向からスポット光で照射する工程と、そのスポット光照射領域に塗布層が有る場合にその領域からの反射光が通る光路上に位置するが、塗布層がない場合にその領域からの反射光が通る光路からは外れた位置に配置した受光手段であって、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成された前記受光手段によって前記スポット光照射領域からの反射光を受光し、光入射を検知した画素の個数から塗布層の有無を検知する工程とを有することを特徴とする。この構成により、スポット光を照射した領域に塗布層が存在していると、その領域からの反射光が受光手段の多くの画素に入射するが、塗布層が存在しない場合には反射光が受光手段にほとんど入射しないため、受光手段の光入射を検知した画素の個数から塗布層の有無を判断でき、塗布層内に蛍光染料を使用しなくても塗布層の有無を検知できる。 As a result of various studies to solve the above-mentioned problems, the present inventors, as a method for detecting a coating layer coated in a strip shape in a partial region in the width direction of the original film , at least the coating layer of the original film Paying attention to the fact that the direction of the reflected light is different from the case where there is no coating layer due to refraction and reflection at the surface when passing through the coating layer when light is applied to the coating layer forming region including the full width of On the optical path of the reflected light when there is a coating layer, a light receiving means composed of a CCD image pickup device having a plurality of pixels in the vertical and horizontal directions is arranged, and the number of pixels in which light incidence of the light receiving means is detected is measured. As a result, it was found that the presence or absence of the coating layer could be determined, and the present invention was completed. That is, the coating layer detection method according to the invention according to the claims 1, presence or absence of a partial area in the width direction of the raw film which is continuously traveling, the coating layer being applied in a strip shape extending in the direction of travel A coating layer detection method for detecting a coating layer forming region including at least the entire width of the coating layer of the continuously running original film, a surface substantially perpendicular to the running direction of the original film. The step of irradiating with spot light from the direction inclined with respect to the original fabric film, and the spot light irradiation area, when there is a coating layer, is located on the optical path through which reflected light from that area passes. Light receiving means disposed at a position deviating from the optical path through which reflected light from the area passes when there is no light, and the spot light irradiation is performed by the light receiving means constituted by a CCD image pickup device having a plurality of pixels in the vertical and horizontal directions. Receiving light reflected from the region, characterized by a step of detecting the presence or absence of the coating layer from the number of pixels detecting light incident. With this configuration, if the coating layer is present in the spot-irradiated region, the reflected light from that region is incident on many pixels of the light receiving means, but if there is no coating layer, the reflected light is received. Since the light hardly enters the means, the presence / absence of the coating layer can be determined from the number of pixels in which the light incidence of the light receiving means is detected, and the presence / absence of the coating layer can be detected without using a fluorescent dye in the coating layer.

請求項２に係る発明は、上記した塗布層検知方法を筒貼り方法に用いたものである。すなわち、この発明は、原反フィルムの巻取から原反フィルムを引き出し、連続的に走行させながら、該原反フィルムの端部に接着液を連続的に塗布する工程と、塗布によって形成した塗布層の有無を請求項１に記載の塗布層検知方法によって検知する工程と、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とする筒貼り工程と、筒貼りしたフィルムを巻き取る巻取り工程とを有する筒貼り方法である。筒貼り工程に上記した塗布層検知方法を用いたことで、作製した筒状のフィルムに接着不良の部分があるか否か、接着不良があった場合にはその位置等を知ることができる。 The invention according to claim 2 uses the coating layer detection method described above for the cylinder pasting method. That is, the present invention includes a step of continuously applying an adhesive liquid to the end of the original film while drawing the original film from the winding of the original film and continuously running the film, and an application formed by application A step of detecting the presence or absence of a layer by the coating layer detection method according to claim 1, a cylinder pasting step in which both ends of the raw film are overlapped and the overlapping portions are joined to form a cylinder, and the cylinder pasted film It is the cylinder sticking method which has a winding-up process which winds up. By using the above-described coating layer detection method in the cylinder pasting step, it is possible to know whether or not there is an adhesion failure portion in the produced cylindrical film, and if there is an adhesion failure, the position and the like can be known.

請求項３に係る発明は、請求項２の筒貼り方法において、更に、塗布層が無いと検知された部分に識別用のテープを付与する工程を設けたことを特徴とする。これにより、作製された製品内の接着不良個所をテープによって容易に知ることができる。 The invention according to claim 3 is characterized in that, in the cylinder pasting method according to claim 2 , a step of applying an identification tape to a portion detected as having no coating layer is further provided. As a result, it is possible to easily know the location of poor adhesion in the manufactured product with the tape.

請求項４に係る発明は、連続的に走行している原反フィルムの幅方向の一部領域に、走行方向に延びる帯状に塗布されている塗布層の有無を検知する塗布層検知装置であって、前記連続的に走行している原反フィルムの、少なくとも前記塗布層の全幅を含んだ塗布層形成領域を、原反フィルムの走行方向にほぼ直角な面内で且つ原反フィルムに対して傾斜した方向からスポット光で照射する照射手段と、そのスポット光照射領域に塗布層が有る場合にその領域からの反射光が通る光路上に位置するが、塗布層がない場合にその領域からの反射光が通る光路からは外れた位置に配置した受光手段であって、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成された前記受光手段と、該受光手段からの信号から光入射を検知した画素の個数を計数し、その個数から塗布層の有無を検知する検知手段とを有する塗布層検知装置である。この装置を用いることで、請求項１に係る発明の塗布層検知方法を実施して、塗布層の有無を検知できる。 The invention according to claim 4 is a coating layer detection device that detects the presence or absence of a coating layer applied in a strip shape extending in the traveling direction in a partial region in the width direction of a continuously running raw film. The coating layer forming region including at least the entire width of the coating layer of the continuously running original film is within a plane substantially perpendicular to the running direction of the original film and to the original film. Irradiating means for irradiating with spot light from an inclined direction, and when there is a coating layer in the spot light irradiation region, it is located on the optical path through which reflected light from that region passes, but when there is no coating layer, from that region Light receiving means arranged at a position deviated from the optical path through which the reflected light passes, the light receiving means composed of a CCD image pickup device having a plurality of pixels in the vertical and horizontal directions, and light incident from the signal from the light receiving means. Number of detected pixels Counted and a coating layer sensing device having a sensing means for detecting the presence or absence of the coating layer from the number. By using this apparatus, it is possible to detect the presence or absence of a coating layer by carrying out the coating layer detection method of the invention according to claim 1.

請求項５に係る発明は、上記した塗布層検知装置を筒貼り装置に用いたものである。すなわち、この発明は、原反フィルムの巻取をセットし、その巻取から原反フィルムを繰り出す給紙部と、連続的に走行中の原反フィルムの端部に接着液を連続的に塗布する塗布装置と、該塗布装置の下流に設けられ、該塗布装置によって原反フィルムの端部に形成した塗布層の有無を検知する請求項４に記載の塗布層検知装置と、その下流に配置され、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とする筒貼り部と、筒貼りしたフィルムを巻き取る巻取部とを有する筒貼り装置である。この装置では、筒貼り装置に上記した塗布層検知装置を用いたことで、作製した筒状のフィルムに接着不良の部分があるか否か、接着不良があった場合にはその位置等を知ることができる。 According to a fifth aspect of the present invention, the above-described coating layer detection device is used for a cylinder pasting device. That is, the present invention sets the winding of the raw film, and continuously applies the adhesive liquid to the paper feeding unit that feeds the raw film from the winding and the end of the running raw film continuously. a coating apparatus for, provided downstream of the coating apparatus, a coating layer detecting apparatus according to claim 4 for detecting the presence or absence of a coating layer formed on an end portion of the original film by coating apparatus, arranged downstream thereof The cylinder pasting apparatus includes a cylinder pasting section that overlaps both ends of the raw film and joins the overlapping portions to form a cylinder, and a winding section that winds the film pasted on the cylinder. In this apparatus, by using the above-described coating layer detecting apparatus for the cylinder pasting apparatus, it is possible to know whether or not there is an adhesion failure portion in the produced cylindrical film, and if there is an adhesion failure, the position thereof is known. be able to.

請求項６に係る発明は、請求項５の筒貼り装置において、更に、筒貼り部の下流に、前記塗布層検知装置によって塗布層が無いと検知された部分に識別用のテープを付与するテープ付与装置を設けたことを特徴とする。これにより、作製された製品内の接着不良個所をテープによって容易に知ることができる。 The invention according to claim 6 is the cylinder sticking device according to claim 5 , further comprising a tape for applying an identification tape to a portion detected by the coating layer detecting device that there is no coating layer downstream of the tube sticking portion. An applicator is provided. As a result, it is possible to easily know the location of poor adhesion in the manufactured product with the tape.

本発明の塗布層検知方法及び装置によれば、走行中の原反フィルムの塗布層形成領域にスポット光を照射し、その反射光を受光手段で受光し、光入射を検知した画素の個数から塗布層の有無を判断でき、塗布層内に蛍光染料を使用しなくても塗布層の有無を検知できる。このため、蛍光染料を用いた際に生じる人体への影響を考慮する必要がなく、食品及び飲料用途に使用するフィルムに対する接着液の塗布状態の検知にも良好に使用できる。すなわち、本発明では蛍光染料などの有害物質を使用する必要がなく、また、検知対象の塗布層を着色する必要もないので、商品の美観性、身体環境的メリットが大きい。なお、検知対象である塗布層は、接着液を塗布して形成したものに限らず、樹脂を帯状に塗布して形成したパートコート等のコーティング層であってもよい。また、塗布層は液状のままであってもよいし、乾燥した状態であってもよく、いずれの場合でも検知できる。 According to the coating layer detection method and apparatus of the present invention, spot light is irradiated to the coating layer forming region of the running raw film, the reflected light is received by the light receiving means, and the number of pixels that have detected light incidence is determined. The presence or absence of the coating layer can be determined, and the presence or absence of the coating layer can be detected without using a fluorescent dye in the coating layer. For this reason, it is not necessary to consider the influence to the human body which arises when using fluorescent dye, and it can be used favorably also for the detection of the application | coating state of the adhesive liquid with respect to the film used for a foodstuff and a drink use. That is, in the present invention, it is not necessary to use harmful substances such as fluorescent dyes, and it is not necessary to color the coating layer to be detected. Note that the coating layer to be detected is not limited to the one formed by applying an adhesive liquid, and may be a coating layer such as a part coat formed by applying a resin in a band shape. Further, the coating layer may remain in a liquid state or may be in a dry state, and can be detected in any case.

本発明の塗布層検知方法及び装置は、筒状のラベルを連続的に作製する筒貼り方法及び装置にインラインで用いることが好ましく、この構成とすることで、接着液の塗布の有無を瞬時に判断することができ、また、製造された製品内に接着不良個所があるか否か、接着不良があった場合にはその位置等を知ることができ、後工程で不良個所を容易に除去することができる。よって、ラベルの接着不良、途中脱落などの事故、クレームが劇的に回避、減少するものと考えられる。   The coating layer detection method and apparatus of the present invention are preferably used in-line in a cylinder pasting method and apparatus for continuously producing a cylindrical label. With this configuration, the presence or absence of application of the adhesive liquid is instantaneously determined. It is possible to determine whether or not there is an adhesion failure location in the manufactured product, and if there is an adhesion failure, it is possible to know the position and the like, and easily remove the failure location in a later process. be able to. Therefore, it is considered that accidents such as poor adhesion of labels, dropping off in the middle, and claims are dramatically avoided and reduced.

以下、本発明を筒貼り工程における接着液の塗布層の有無検知に適用した実施形態を説明する。図１は筒状のラベルを作製するための筒貼り装置の概略構成を示す模式図であり、１は、原反フィルムの巻取２Ａをセットし、その巻取２Ａから原反フィルム２を繰り出す給紙部、３は連続的に走行中の原反フィルム２の端部に接着液を連続的に塗布して、原反フィルム２の走行方向に延びる帯状の塗布層４（図２参照）を形成するための塗布装置、６はその下流に設けられ、原反フィルム２端部の塗布層の有無を検知する塗布層検知装置、７はその下流に配置され、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とする筒貼り部、８は筒貼りしたフィルムを巻取２Ｂを形成するように巻き取る巻取部である。ここで、塗布層検知装置６を除いた部分は公知の筒貼り装置と同様であるので、説明は省略する。 Hereinafter, an embodiment in which the present invention is applied to detection of the presence / absence of a coating layer of an adhesive liquid in a cylinder pasting step will be described. FIG. 1 is a schematic view showing a schematic configuration of a cylinder sticking apparatus for producing a cylindrical label. 1 is a roll 2A of a raw film set, and the raw film 2 is fed out of the roll 2A. The sheet feeding unit 3 continuously applies an adhesive liquid to the end of the raw film 2 that is continuously running, and forms a strip-shaped coating layer 4 (see FIG. 2) extending in the running direction of the original film 2 . A coating device 6 for forming is provided downstream, and a coating layer detecting device 7 for detecting the presence or absence of a coating layer at the end of the original film 2, is disposed downstream thereof, and overlaps both ends of the original film In addition, a cylinder pasting portion 8 that joins the overlapping portions into a cylindrical shape, and 8 is a winding portion that winds the tube-laminated film so as to form the winding 2B. Here, since the part except the coating layer detection apparatus 6 is the same as a well-known cylinder sticking apparatus, description is abbreviate | omitted.

原反フィルム２には、ポリエチレン、ポリプロピレン、ポリスチレン、ポリエステルフィルム等のラベルに使用することが可能なフィルムが使用される。   The raw film 2 is a film that can be used for a label such as polyethylene, polypropylene, polystyrene, or polyester film.

接着液としては、ポリエチレンやポリプロピレン等の耐溶剤性を有するオレフィン系フィルムに対しては、ポリウレタン樹脂系接着剤、ポリアミド樹脂系接着剤、ポリアクリル樹脂系接着剤、ポリ酢酸ビニル樹脂系接着剤、セルロース樹脂系接着剤、エポキシ樹脂系接着剤等の接着剤が使用される。これらの接着剤を用いる場合には、塗布装置３の下流に乾燥装置を配置して塗布した接着剤を乾燥させる場合もある。その場合、塗布層検知装置６は乾燥前の塗布層を検知する位置に配置してもよいが、乾燥後の塗布層を検知する位置に配置した方が、万一原反フィルム２に振動等があっても塗布層の接着剤が飛び散るということがなく、このため塗布層検知装置の検知部を接着剤で汚すということがなく、好ましい。一方、ポリスチレンやポリエステル等の溶剤可溶性を有するフィルムに対しては、接着液として、これらの樹脂を溶解させうる接着（溶着）溶剤が使用され、具体的には、テトラヒドロフラン、ジオキソラン等の環状エーテル系溶剤や、各種混合溶剤（ＯＰＳ溶剤）が用いられる。これらの接着溶剤を用いる場合には、原反フィルム２に接着溶剤を塗布した後、乾燥させることなく筒貼り部に供給することとなるため、塗布層検知装置６は液状の塗布層を検知する位置に配置される。   For the olefin film having solvent resistance such as polyethylene and polypropylene as the adhesive liquid, polyurethane resin adhesive, polyamide resin adhesive, polyacrylic resin adhesive, polyvinyl acetate resin adhesive, Adhesives such as cellulose resin adhesives and epoxy resin adhesives are used. When these adhesives are used, the applied adhesive may be dried by disposing a drying device downstream of the coating device 3. In that case, the coating layer detection device 6 may be disposed at a position where the coating layer before drying is detected, but it is more likely that the coating layer detection device 6 vibrates the raw film 2 if it is disposed at a position where the coating layer after drying is detected. Even if there is, there is no possibility that the adhesive of the coating layer will scatter, and therefore, the detection part of the coating layer detection device will not be stained with the adhesive. On the other hand, for films having solvent solubility such as polystyrene and polyester, an adhesive (welding) solvent capable of dissolving these resins is used as an adhesive liquid. Specifically, cyclic ethers such as tetrahydrofuran and dioxolane are used. A solvent and various mixed solvents (OPS solvent) are used. In the case of using these adhesive solvents, since the adhesive solvent is applied to the raw film 2 and then supplied to the cylinder pasting portion without drying, the coating layer detection device 6 detects the liquid coating layer. Placed in position.

図２は、塗布層検知装置６を図１の矢印Ａ−Ａで示す方向に見て示す概略側面図であり、図中、２は原反フィルム、４はその上に接着剤を塗布して形成した塗布層である。塗布層検知装置６は、連続的に走行している原反フィルム２の塗布層形成領域（具体的には、塗布層４を含み塗布層の幅の数倍程度の幅の領域）を、原反フィルムの走行方向にほぼ直角な面内で且つ原反フィルムに対して傾斜した方向からスポット光で照射する照射手段１１と、そのスポット光照射領域から反射した反射光を受光するための受光手段１２と、受光手段１２からの信号から塗布層４の有無を検知する検知手段１３等を備えている。なお、図１にも示すように、塗布層を検知する位置には、検知対象となる原反フィルム２の位置を安定させるため、支持ローラ１４が設けられており、原反フィルム２の、支持ローラ１４で支持されている領域に対して塗布層検知が行われる。   FIG. 2 is a schematic side view showing the coating layer detecting device 6 as viewed in the direction indicated by the arrow AA in FIG. 1. In the figure, 2 is a raw film and 4 is an adhesive applied thereon. It is the formed coating layer. The coating layer detection device 6 is configured to apply a coating layer forming region (specifically, a region having a width several times the width of the coating layer including the coating layer 4) of the raw film 2 that is continuously running. Irradiation means 11 for irradiating with spot light from a direction substantially perpendicular to the traveling direction of the anti-film and inclined with respect to the original film, and light-receiving means for receiving reflected light reflected from the spot light irradiation area 12 and detection means 13 for detecting the presence / absence of the coating layer 4 from the signal from the light receiving means 12. In addition, as shown also in FIG. 1, in order to stabilize the position of the raw film 2 used as a detection target, the support roller 14 is provided in the position which detects an application layer, and support of the original film 2 is supported. The coating layer detection is performed on the area supported by the roller 14.

照射手段１１は、光源１５と、それに接続され、スポット光を照射する光ファイバ１６を備えている。照射手段１１に光ファイバ１６を用いたことで、光ファイバ１６を容易に所望の位置に所望の角度で取り付けることができ、スポット光の照射位置や方向を容易に調整できる利点が得られる。受光手段１２は、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成されており、この実施形態ではカラーＣＣＤ撮像素子（ＣＣＤカメラ）が用いられている。この受光素子１２はその受光面が、スポット光照射領域に塗布層４がある場合にその領域からの反射光の光路上に位置するように、且つ照射領域に塗布層が無い場合にその領域からの反射光の光路とは外れた位置となるように、取り付けられている。更に詳しく説明すると、今、光ファイバ１６から原反フィルム２に照射される光の光路１７の原反フィルム２に対する傾斜角度をθ1 とすると、原反フィルム２上に塗布層４が無い場合には原反フィルム２で反射した光の光路１８は、二点鎖線で示すように、入射側の光路１７と照射位置での垂線Ｓに関して対称となり、原反フィルム２に対する傾斜角度もθ1 となる。ところが、原反フィルム２上に塗布層４が有ると、光ファイバ１６から照射された光は一部が塗布層４の表面で反射し、一部は塗布層４を透過して原反フィルム２の表面で反射することとなるが、塗布層４を透過する際に塗布層４による屈折率によって屈曲し、反射光は先に説明した光路１８とは異なる方向に進行する。また、塗布層４の表面で反射した光も塗布層の表面状態等によって影響され、光路１８とは異なる方向に進行する。この結果、塗布層４が有る場合に、その塗布層形成領域から反射する光の平均的な光路１９は先に説明した光路１８とは異なる方向となり、原反フィルム２に対する傾斜角度はθ2 となる。前記した受光手段１２の受光面は、光路１９を通る光を受光するように光路１９上に、且つ光路１８を通る光は受光しないように光路１８から外れた位置に、配置されている。これにより、原反フィルム２上に正常な塗布層４が存在している場合には、受光手段１２の受光面には、図３（ａ）に示すように、塗布層４に対応して帯状の領域２１に光が入射し、その他の領域２２、２３にはほとんど光が入射しない（なお、図面は説明用に描いたものであり、実際には光の入射する領域と入射しない領域の境界は必ずしも直線状ではなく、また、明瞭な境界があるとは限らないが、いずれにしても広い面積に光が入射する）。一方、塗布層４がかすれ状態であった場合には、受光面には、図３（ｂ）に示すように、かすれ状態の塗布層４に対応して複数の細長い領域２４に光が入射し、その他の領域２５にはほとんど光が入射しない。更に、塗布層が無い場合には、受光面には、図３（ｃ）に示すように、全領域２６にほとんど光が入射しない。従って、受光面への入射光量（或いは入射面積）を知ることで塗布層４が有るか否かを判定できる。 The irradiation unit 11 includes a light source 15 and an optical fiber 16 connected to the light source 15 and configured to irradiate spot light. By using the optical fiber 16 for the irradiation means 11, the optical fiber 16 can be easily attached to a desired position at a desired angle, and an advantage that the irradiation position and direction of the spot light can be easily adjusted is obtained. Light receiving means 12 each in vertical and horizontal directions is constituted by a CCD imaging device having a plurality of pixels, the color CCD image sensor (CCD camera) is used in this embodiment. The light receiving element 12 has its light receiving surface positioned on the optical path of the reflected light from the spot light irradiation region when the coating layer 4 is present, and from the region when there is no coating layer in the irradiation region. It is attached so as to be out of the optical path of the reflected light. More specifically, when the inclination angle of the optical path 17 of the light irradiated from the optical fiber 16 to the original film 2 with respect to the original film 2 is θ 1 , the coating layer 4 is not present on the original film 2. As shown by the two-dot chain line, the optical path 18 of the light reflected by the original film 2 is symmetric with respect to the incident-side optical path 17 and the perpendicular S at the irradiation position, and the inclination angle with respect to the original film 2 is also θ 1. . However, when the coating layer 4 is present on the original film 2, a part of the light irradiated from the optical fiber 16 is reflected on the surface of the coating layer 4, and a part of the light is transmitted through the coating layer 4 to pass through the original film 2. However, when the light passes through the coating layer 4, it is bent by the refractive index of the coating layer 4, and the reflected light travels in a direction different from the optical path 18 described above. Further, the light reflected on the surface of the coating layer 4 is also affected by the surface state of the coating layer and the like, and travels in a direction different from the optical path 18. As a result, when the coating layer 4 is present, the average optical path 19 of light reflected from the coating layer forming region is different from the optical path 18 described above, and the inclination angle with respect to the original film 2 is θ 2 . Become. The light receiving surface of the light receiving means 12 is arranged on the optical path 19 so as to receive light passing through the optical path 19 and at a position away from the optical path 18 so as not to receive light passing through the optical path 18. Thereby, when the normal coating layer 4 exists on the raw fabric film 2, the light receiving surface of the light receiving means 12 has a strip shape corresponding to the coating layer 4 as shown in FIG. The light is incident on the region 21 and almost no light is incident on the other regions 22 and 23 (note that the drawings are drawn for explanation, and the boundary between the region where the light is actually incident and the region where the light is not incident is actually shown. Is not necessarily linear and does not always have a clear boundary, but in any case light enters a large area). On the other hand, when the coating layer 4 is in a blurred state, light is incident on a plurality of elongated regions 24 corresponding to the blurred coating layer 4 as shown in FIG. 3B. The light hardly enters the other region 25. Further, when there is no coating layer, almost no light is incident on the entire area 26 on the light receiving surface as shown in FIG. Therefore, it is possible to determine whether or not the coating layer 4 is present by knowing the amount of light incident on the light receiving surface (or the incident area).

受光手段１２からの信号から塗布層４の有無を検知する検知手段１３は、受光手段１２を構成するＣＣＤ撮像素子からの信号を入力し、その信号から光入射を検知した画素の個数を計数し、塗布層の有無を検知する画像処理装置で構成されている。更に説明すると、画像処理装置１３は、ＣＣＤ撮像素子１２の受光面にある多数の画素からの信号を入力し、必要に応じ、マスキングして測定範囲を設定し、その測定範囲内にある各画素が光入射を検知したか否かを判断し（各画素からの信号を、２値化し）、光入射を検知した画素数を計数する。この画素数は、例えば、ＣＣＤ撮像素子１２の受光面に図３（ａ）に示すように、領域２１に光が入射し、その他の領域２２、２３には入射していない場合には、領域２１内に存在する画素数を示しているので、この画素数は入射光量に応じたものとなっている。画像処理装置は、この画素数をあらかじめ設定したしきい値と比較することで、塗布層４の有無を検知する。例えば、塗布層４の幅を約３ｍｍとした場合において、これを画素数、５０８×４８０のＣＣＤ撮像素子１２を用いて測定した場合、光入射を検知した画素数は次の通りであった。
正常な塗布層４形成領域： １００００〜３００００画素
かすれ状態の塗布層形成領域： ２０００〜３０００画素
塗布層の無い領域： ０〜１０００画素
従って、良品判定のしきい値を、例えば、６０００画素と設定しておくことで、正常な塗布層４が存在しているか否かを検知できる。 The detecting means 13 for detecting the presence or absence of the coating layer 4 from the signal from the light receiving means 12 inputs a signal from the CCD image pickup device constituting the light receiving means 12, and counts the number of pixels from which light incidence has been detected. The image processing apparatus detects the presence or absence of a coating layer. More specifically, the image processing device 13 inputs signals from a large number of pixels on the light receiving surface of the CCD image pickup device 12, sets a measurement range by masking as necessary, and sets each pixel within the measurement range. Determine whether or not light incidence is detected (binarize the signal from each pixel), and count the number of pixels that detected light incidence. For example, as shown in FIG. 3A, the number of pixels is the region when light is incident on the region 21 and is not incident on the other regions 22 and 23 as shown in FIG. Since the number of pixels existing in 21 is shown, this number of pixels corresponds to the amount of incident light. The image processing apparatus detects the presence or absence of the coating layer 4 by comparing the number of pixels with a preset threshold value. For example, when the width of the coating layer 4 is about 3 mm and this is measured using the CCD image pickup device 12 having a number of pixels of 508 × 480, the number of pixels in which light incidence is detected is as follows.
Normal coating layer 4 formation region: 10000 to 30000 pixels Faint coating layer formation region: 2000 to 3000 pixels Region without coating layer: 0 to 1000 pixels Accordingly, the threshold value for non-defective product determination is set to, for example, 6000 pixels By doing so, it can be detected whether or not the normal coating layer 4 is present.

画像処理装置１３は、上記した検査動作（光入射を検知した画素数を計数し、ぞれをしきい値と比較して塗布層４の有無を検査する動作）を一定周期で継続して実施する機能を備えている。ここで検査動作を実施する周期は短い程、原反フィルムにおける検査位置の長手方向のピッチを短くできるので好ましいが、検査機器上の制約もあるので、１／３０秒程度とするのが良い。また、画像処理装置１３は、検査結果を記憶する機能を備えると共に必要に応じ、プリンタを介して検査結果を印字出力する機能も備えている。更に、図１には図示を省略しているが、巻取部８の前に走行中の原反フィルム２に識別用のテープ、例えば金属テープを付与し、貼り付けるテープ付与装置が設けられている。前記画像処理装置１３は検知の結果、不良と判断した場合にはその結果をテープ付与装置に出力する機能も備えており、テープ付与装置はその情報に基づき、塗布層が無いと検知された部分に識別用のテープを貼り付ける。   The image processing apparatus 13 continuously performs the above-described inspection operation (an operation for counting the number of pixels in which light incidence has been detected and comparing each of them with a threshold value to inspect for the presence of the coating layer 4) at a constant period. It has a function to do. Here, the shorter the period for performing the inspection operation, the shorter the pitch in the longitudinal direction of the inspection position in the raw film, which is preferable. However, there are restrictions on the inspection equipment, so it is preferable to set the period to about 1/30 seconds. In addition, the image processing apparatus 13 has a function of storing the inspection result and, if necessary, a function of printing out the inspection result via a printer. Further, although not shown in FIG. 1, there is provided a tape applying device for applying an identification tape, for example, a metal tape, to the original film 2 that is running in front of the winding unit 8 and attaching the tape. Yes. The image processing device 13 also has a function of outputting the result to the tape applying device when it is determined as a result of detection, and the tape applying device is based on the information and detected that there is no coating layer. Affix the tape for identification.

図４は、塗布層検知装置６を筒貼り装置に取り付けるための具体的な機構の１例である取付装置３０を示すものである。取付装置３０は、筒貼り装置の両側のフレーム３１に取り付けられた一対の側板３２と、その一対の側板３２に、支持ローラ１４に平行に取り付けられた一対のガイドロッド３３と、そのガイドロッド３３に移動可能に保持された移動台３４と、その移動台３４を水平に移動させて位置調整を行うためのねじ軸３６及びハンドル３７と、移動台３４に位置調整可能な形態で取り付けられたカメラ支持台３８等を備えており、そのカメラ支持台３８にＣＣＤ撮像素子１２が、支点Ｏを中心とした旋回角度を調整可能な形態で取り付けられている。取付装置３０は更に、移動台３４に垂直に移動可能に保持された昇降台４１と、その昇降台４１を昇降させるためのねじ軸４２、ハンドル４３及びねじ軸４２を回転自在に保持する軸受台４４と、昇降台４１に取り付けられた光ファイバ支持台４６を備えており、その光ファイバ支持台４６に光ファイバ１６が、支点Ｐを中心とした旋回角度を調整可能な形態で取り付けられている。この構造としたことにより、光ファイバ１６の支点Ｐを中心とした旋回角度を調整し且つその高さを調整することで、光ファイバ１６からの光を所望の傾斜角度θ1 で所望領域（塗布層４を形成した領域）に照射させることができ、また、ＣＣＤ撮像素子１２の支点Ｏを中心とした旋回角度を調整することで、光照射位置からの傾斜角度θ2 での反射光を受光することができる。そしてこのように、傾斜角度θ1 、θ2 を設定した後は、その状態に固定し、その状態で使用する。原反フィルム２のサイズ変更等に伴って塗布層４の幅方向の位置が変更した場合には、移動台３４を水平に移動させて位置調整することで、検査位置を容易に変更でき、条件変更に容易に対応できる。 FIG. 4 shows an attachment device 30 which is an example of a specific mechanism for attaching the coating layer detection device 6 to the tube sticking device. The attachment device 30 includes a pair of side plates 32 attached to the frames 31 on both sides of the cylinder pasting device, a pair of guide rods 33 attached to the pair of side plates 32 in parallel to the support roller 14, and the guide rods 33. A movable table 34 movably held in the head, a screw shaft 36 and a handle 37 for adjusting the position by moving the movable table 34 horizontally, and a camera attached to the movable table 34 in an adjustable form. A support base 38 and the like are provided, and the CCD image pickup device 12 is attached to the camera support base 38 in a form in which the turning angle about the fulcrum O can be adjusted. The mounting device 30 further includes a lifting / lowering base 41 held vertically movable on the moving base 34, a screw shaft 42 for raising and lowering the lifting / lowering base 41, a handle 43, and a bearing base for rotatably holding the screw shaft 42. 44 and an optical fiber support base 46 attached to the lifting / lowering base 41. The optical fiber 16 is attached to the optical fiber support base 46 in a form in which the turning angle about the fulcrum P can be adjusted. . By adopting this structure, the turning angle around the fulcrum P of the optical fiber 16 is adjusted and the height thereof is adjusted so that the light from the optical fiber 16 is applied at a desired inclination angle θ 1 (coating area). The region where the layer 4 is formed) can be irradiated, and the reflected light at the inclination angle θ 2 from the light irradiation position is received by adjusting the turning angle around the fulcrum O of the CCD image pickup device 12. can do. After the inclination angles θ 1 and θ 2 are set as described above, the state is fixed to the state and used in that state. When the position in the width direction of the coating layer 4 is changed due to the size change of the raw film 2, etc., the inspection position can be easily changed by moving the moving base 34 horizontally to adjust the position. Can easily adapt to changes.

次に、上記構成の筒貼り装置における筒貼り動作及び塗布層検査動作を説明する。図１において、原反フィルム２が巻取２Ａから引き出され、連続的に走行し、その端部に塗布装置３によって接着液が塗布され、次いで、塗布層検知装置６を通った後、筒貼りされ、巻取２Ｂとして巻き取られてゆく。この動作中、塗布層検知装置６がその下を通過中の原反フィルム２に塗布層４があるか否かを一定周期で、例えば、１／３０秒周期で連続的に監視している。すなわち、ＣＣＤ撮像素子１２における光入射を検知した画素数を計数し、ぞれをしきい値と比較して塗布層４の有無を検査する動作を一定周期で繰り返しており、その結果を記憶部に蓄積している。そして、不良と判断した場合にはその結果を、下流に設けているテープ付与装置（図示せず）に出力し、テープ付与装置はその情報に基づき、塗布層が無いと検知された部分に識別用のテープを貼り付ける。かくして、塗布層検知装置６に記憶している検査結果を適当なタイミングでモニターに表示させたり、プリントアウトすることで、不良があったか否かを認識することができ、また、作製された筒貼りフィルムの巻取を後工程で巻き返す際に識別用のテープを監視することで、不良個所を容易に特定して必要な処理を施すことができる。   Next, a cylinder pasting operation and a coating layer inspection operation in the cylinder pasting apparatus having the above configuration will be described. In FIG. 1, the raw film 2 is pulled out from the winding 2 </ b> A, continuously runs, and an adhesive liquid is applied to the end portion thereof by the coating device 3, and then passes through the coating layer detection device 6, and then is attached to the cylinder Then, it is wound up as winding 2B. During this operation, the coating layer detecting device 6 continuously monitors whether or not the coating layer 4 is present on the raw film 2 passing under the coating layer detecting device 6 at a constant cycle, for example, at a cycle of 1/30 seconds. That is, the operation of counting the number of pixels in which light incident is detected in the CCD image pickup device 12 and comparing each of them with a threshold value to inspect for the presence or absence of the coating layer 4 is repeated at a constant cycle. Has accumulated. If it is determined to be defective, the result is output to a tape applying device (not shown) provided downstream, and the tape applying device identifies the portion detected as having no coating layer based on the information. Affix the tape. Thus, it is possible to recognize whether there is a defect by displaying the inspection result stored in the coating layer detection device 6 on a monitor or printing out at an appropriate timing. By monitoring the identification tape when the film is rewound in a subsequent process, it is possible to easily identify a defective portion and perform necessary processing.

［実施例１］
（１）使用装置
塗布層検知装置６として次の仕様のものを用意し、図４に示す構造の取付装置３０を用いて筒貼り装置に取り付けた。
光源１５：光ファイバ照明（株式会社キーエンス製ＣＶ−Ｆ１０）
ＣＣＤ撮像素子１２及び画像処理装置１３：カラー画像センサ（株式会社キーエンス製ＣＶ−７５０）
（２）前処理
ストレッチラベル用ＰＥフィルム（厚さ８０μｍ）（商品名ＤＭＴ−ＨＵ２、大日本樹脂株式会社製）の処理側にグラビア印刷インキを施し、ラベルを構成する寸法にデザインを印刷した。その後スリッターで各ラベル展開寸法幅に切り出し、スリーブ状に筒貼りする前段階のフィルム巻取を作製した。
（３）筒貼り
前記したフィルム巻取を筒貼り装置にセットし、そのフィルム巻取から原反フィルムを連続的に引き出し、印刷層が内面となるようにフィルム両端部を重ね合わせる前のフィルム片端部へウレタン接着剤を約３ｍｍ幅に塗布し、筒貼りを行った後、巻き取り、連続した形態のストレッチラベルの巻取を作製した。また、ウレタン接着剤を塗布した直後の位置で塗布層検知装置６によって塗布状態を１／３０秒周期で監視した。この時のフィルムの走行速度は１００ｍ／分とした。
（４）監視結果
フィルム約１０００ｍを処理したが、その間、塗布層検知装置６は不良を示すことはなかった。また、光入射を検知した画素数の計数結果を適当な周期で取り出して見たところ、１００００〜２００００画素の範囲内に入っていた。
そこで、故意に接着剤塗布を約０．５秒停止したところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は０〜１００画素程度であった。また、故意にかすれ状態を作ったところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は２０００〜３０００画素程度であった。
従って、塗布層検知装置６は、接着剤塗布における慢性的な液抜けや塗布のかすれ等に対して感度良く反応し、正規の塗布状態及び塗布量を継続的に監視することができことを確認できた。
その後、正常と判断された筒貼り済のストレッチラベルの巻取をラベル装着機にセットし、枚葉に切り出し、ポリエチレンテレフタレート製ボトル胴部の外周表面に密着させたところ、安定で美麗に装着でき、脱落、剥がれなどの事故が発生しなかった。従って、塗布層検知装置６による監視結果は十分信頼できるものであることを確認できた。 [Example 1]
(1) Apparatus used The thing of the following specification was prepared as the application layer detection apparatus 6, and it attached to the cylinder sticking apparatus using the attachment apparatus 30 of the structure shown in FIG.
Light source 15: optical fiber illumination (CV-F10 manufactured by Keyence Corporation)
CCD image sensor 12 and image processing device 13: color image sensor (CV-750 manufactured by Keyence Corporation)
(2) Pretreatment Gravure printing ink was applied to the processing side of the PE film for stretch label (thickness 80 μm) (trade name DMT-HU2, manufactured by Dainippon Resin Co., Ltd.), and the design was printed in the dimensions constituting the label. Thereafter, the film was cut into a width of each label development with a slitter, and a film take-up of the previous stage was formed in which a cylinder was pasted into a sleeve shape.
(3) Tube sticking Set the above-described film take-up into a tube sticking device, draw the original film continuously from the film take-up, and end one end of the film before overlapping the film so that the printed layer becomes the inner surface. After applying a urethane adhesive to the part to a width of about 3 mm and sticking a cylinder, it was wound up, and a stretch label was wound in a continuous form. Moreover, the application state was monitored with the period of 1/30 second by the application layer detection apparatus 6 in the position immediately after apply | coating a urethane adhesive. The running speed of the film at this time was 100 m / min.
(4) Monitoring result Although about 1000 m of films were processed, the coating layer detection apparatus 6 did not show a defect in the meantime. In addition, when the count result of the number of pixels in which light incidence was detected was taken out at an appropriate period, it was within the range of 10,000 to 20000 pixels.
Therefore, when the adhesive application was intentionally stopped for about 0.5 seconds, the coating layer detection device 6 immediately reacted and detected a defect. At this time, the number of pixels in which light incidence was detected was about 0 to 100 pixels. Further, when a faint state was intentionally created, the coating layer detecting device 6 reacted immediately and detected a defect. At this time, the number of pixels in which light incidence was detected was about 2000 to 3000 pixels.
Therefore, it is confirmed that the coating layer detecting device 6 reacts with high sensitivity to chronic liquid dropout or faint coating in the adhesive coating, and can continuously monitor the regular coating state and the coating amount. did it.
After that, when the take-up of the stretched label attached to the cylinder, which was judged to be normal, was set in a label attaching machine, cut into a sheet, and brought into close contact with the outer peripheral surface of the polyethylene terephthalate bottle body, it was possible to attach it stably and beautifully. There were no accidents such as falling off or peeling off. Therefore, it was confirmed that the monitoring result by the coating layer detection device 6 was sufficiently reliable.

［実施例２］
（１）使用装置
塗布層検知装置６として実施例１と同一のものを用意し、図４に示す構造の取付装置３０を用いて筒貼り装置に取り付けた。
（２）前処理
シュリンクラベル用ＯＰＳフィルム（厚さ６０μｍ）（商品名：ＥＰＳ４５Ｔ、シーアイ化成株式会社製）の処理側にグラビア印刷インキを施し、ラベルを構成する寸法にデザインを印刷した。その後スリッターで各ラベル展開寸法幅に切り出し、スリーブ状に筒貼りする前段階のフィルム巻取を作製した。
（３）筒貼り
前記したフィルム巻取を筒貼り装置にセットし、そのフィルム巻取から原反フィルムを連続的に引き出し、印刷層が内面となるようにフィルム両端部を重ね合わせる前のフィルム片端部へ溶着溶剤（ＯＰＳ溶剤：酢酸メチル、シクロヘキサン、メタノール）を約３ｍｍ幅に塗布し、筒貼りを行った後、巻き取り、連続した形態のシュリンクラベルの巻取を作製した。また、溶着溶剤を塗布した直後の位置で塗布層検知装置６によって塗布状態を１／３０秒周期で監視した。この時のフィルムの走行速度は１００ｍ／分とした。
（４）監視結果
フィルム約１０００ｍを処理したが、その間、塗布層検知装置６は不良を示すことはなかった。また、光入射を検知した画素数の計数結果を適当な周期で取り出して見たところ、１００００〜２００００画素の範囲内に入っていた。
そこで、故意に溶着溶剤塗布を約０．５秒停止したところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は０〜１００画素程度であった。また、故意にかすれ状態を作ったところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は２０００〜３０００画素程度であった。
従って、塗布層検知装置６は、溶着溶剤塗布においても、慢性的な液抜けや塗布のかすれ等に対して感度良く反応し、正規の塗布状態及び塗布量を継続的に監視することができることを確認できた。
その後、正常と判断された筒貼り済のシュリンクラベルの巻取をラベル装着機にセットし、枚葉に切り出し、ポリエチレンテレフタレート製ボトル胴部の外周表面に密着（熱収縮）させたところ、安定で美麗に装着でき、脱落、剥がれなどの事故が発生しなかった。従って、塗布層検知装置６による監視結果は十分信頼できるものであることを確認できた。 [Example 2]
(1) Device Used The same coating layer detection device 6 as that of Example 1 was prepared and attached to the cylinder pasting device using the attachment device 30 having the structure shown in FIG.
(2) Pretreatment The gravure printing ink was applied to the processing side of the OPS film for shrink labels (thickness 60 μm) (trade name: EPS45T, manufactured by CI Kasei Co., Ltd.), and the design was printed to the dimensions constituting the label. Thereafter, the film was cut into a width of each label development with a slitter, and a film take-up of the previous stage was formed in which a cylinder was pasted into a sleeve shape.
(3) Tube sticking Set the above-described film take-up into a tube sticking device, draw the original film continuously from the film take-up, and end one end of the film before overlapping the film so that the printed layer becomes the inner surface. A welding solvent (OPS solvent: methyl acetate, cyclohexane, methanol) was applied to the part to a width of about 3 mm, and the tube was pasted, and then wound up to produce a continuous shrink label. In addition, the coating state was monitored at a period of 1/30 seconds by the coating layer detection device 6 at a position immediately after coating the welding solvent. The running speed of the film at this time was 100 m / min.
(4) Monitoring result Although about 1000 m of films were processed, the coating layer detection apparatus 6 did not show a defect in the meantime. In addition, when the count result of the number of pixels in which light incidence was detected was taken out at an appropriate period, it was within the range of 10,000 to 20000 pixels.
Therefore, when the welding solvent application was intentionally stopped for about 0.5 seconds, the coating layer detection device 6 immediately reacted and detected a defect. At this time, the number of pixels in which light incidence was detected was about 0 to 100 pixels. Further, when a faint state was intentionally created, the coating layer detecting device 6 reacted immediately and detected a defect. At this time, the number of pixels in which light incidence was detected was about 2000 to 3000 pixels.
Therefore, the coating layer detection device 6 can react with high sensitivity to chronic liquid dropout, faint coating, etc. even in welding solvent coating, and can continuously monitor the regular coating state and coating amount. It could be confirmed.
After that, when the roll of the shrink-bonded shrink label that was judged to be normal was set on a label mounting machine, cut into a sheet, and tightly adhered (heat-shrinked) to the outer peripheral surface of the polyethylene terephthalate bottle body, it was stable. Attached beautifully, no accidents such as dropping off or peeling off. Therefore, it was confirmed that the monitoring result by the coating layer detection device 6 was sufficiently reliable.

［実施例３］
（１）使用装置
塗布層検知装置６として実施例１と同一のものを用意し、図４に示す構造の取付装置３０を用いて筒貼り装置に取り付けた。
（２）前処理
シュリンクラベル用ＰＥＴフィルム（厚さ４５μｍ）（商品名：Ｓ７５０４、東洋紡株式会社製）の処理側にグラビア印刷インキを施し、ラベルを構成する寸法にデザインを印刷した。その後スリッターで各ラベル展開寸法幅に切り出し、スリーブ状に筒貼りする前段階のフィルム巻取を作製した。
（３）筒貼り
前記したフィルム巻取を筒貼り装置にセットし、そのフィルム巻取から原反フィルムを連続的に引き出し、印刷層が内面となるようにフィルム両端部を重ね合わせる前のフィルム片端部へ溶着溶剤（ＴＨＦ：テトラヒドロフラン）を約３ｍｍ幅に塗布し、筒貼りを行った後、巻き取り、連続した形態のシュリンクラベルの巻取を作製した。また、溶着溶剤を塗布した直後の位置で塗布層検知装置６によって塗布状態を１／３０秒周期で監視した。この時のフィルムの走行速度は１００ｍ／分とした。
（４）監視結果
フィルム約１０００ｍを処理したが、その間、塗布層検知装置６は不良を示すことはなかった。また、光入射を検知した画素数の計数結果を適当な周期で取り出して見たところ、１００００〜２００００画素の範囲内に入っていた。
そこで、故意に溶着溶剤塗布を約０．５秒停止したところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は０〜１００画素程度であった。また、故意にかすれ状態を作ったところ、塗布層検知装置６が直ちに反応して不良と検知した。この時の光入射を検知した画素数は２０００〜３０００画素程度であった。
従って、塗布層検知装置６は、溶着溶剤塗布においても、慢性的な液抜けや塗布のかすれ等に対して感度良く反応し、正規の塗布状態及び塗布量を継続的に監視することができることを確認できた。
その後、正常と判断された筒貼り済のシュリンクラベルの巻取をラベル装着機にセットし、枚葉に切り出し、ポリエチレンテレフタレート製ボトル胴部の外周表面に密着（熱収縮）させたところ、安定で美麗に装着でき、脱落、剥がれなどの事故が発生しなかった。従って、塗布層検知装置６による監視結果は十分信頼できるものであることを確認できた。 [Example 3]
(1) Device Used The same coating layer detection device 6 as that of Example 1 was prepared and attached to the cylinder pasting device using the attachment device 30 having the structure shown in FIG.
(2) Pretreatment Gravure printing ink was applied to the treatment side of a PET film for shrink label (thickness: 45 μm) (trade name: S7504, manufactured by Toyobo Co., Ltd.), and the design was printed to the dimensions constituting the label. Thereafter, the film was cut into a width of each label development with a slitter, and a film take-up of the previous stage was formed in which a cylinder was pasted into a sleeve shape.
(3) Tube sticking Set the above-described film take-up into a tube sticking device, draw the original film continuously from the film take-up, and end one end of the film before overlapping the film so that the printed layer becomes the inner surface. A welding solvent (THF: tetrahydrofuran) was applied to the part to a width of about 3 mm, and the tube was pasted, and then wound up to produce a continuous form of shrink label. In addition, the coating state was monitored at a period of 1/30 seconds by the coating layer detection device 6 at a position immediately after coating the welding solvent. The running speed of the film at this time was 100 m / min.
(4) Monitoring result Although about 1000 m of films were processed, the coating layer detection apparatus 6 did not show a defect in the meantime. In addition, when the count result of the number of pixels in which light incidence was detected was taken out at an appropriate period, it was within the range of 10,000 to 20000 pixels.
Therefore, when the welding solvent application was intentionally stopped for about 0.5 seconds, the coating layer detection device 6 immediately reacted and detected a defect. At this time, the number of pixels in which light incidence was detected was about 0 to 100 pixels. Further, when a faint state was intentionally created, the coating layer detecting device 6 reacted immediately and detected a defect. At this time, the number of pixels in which light incidence was detected was about 2000 to 3000 pixels.
Therefore, the coating layer detection device 6 can react with high sensitivity to chronic liquid dropout, faint coating, etc. even in welding solvent coating, and can continuously monitor the regular coating state and coating amount. It could be confirmed.
After that, when the roll of the shrink-bonded cylinder label that was judged to be normal was set on a label mounting machine, cut into single sheets, and tightly adhered (heat-shrinked) to the outer peripheral surface of the polyethylene terephthalate bottle body, it was stable. Attached beautifully, no accidents such as dropping off or peeling off. Therefore, it was confirmed that the monitoring result by the coating layer detection device 6 was sufficiently reliable.

塗布層検知装置を組み込んだ筒貼り装置の概略構成を示す模式図Schematic diagram showing the schematic configuration of a cylinder pasting device incorporating a coating layer detection device 塗布層検知装置を図１の矢印Ａ−Ａ方向に見て示す概略図Schematic showing the coating layer detection device as seen in the direction of arrow AA in FIG. （ａ）、（ｂ）、（ｃ）は受光手段の受光面に対する光入射状態を説明する図(A), (b), (c) is a figure explaining the light-incidence state with respect to the light-receiving surface of a light-receiving means. 塗布層検知装置を筒貼り装置に取り付けるための取付装置の概略正面図Schematic front view of an attachment device for attaching the coating layer detection device to the cylinder pasting device

符号の説明Explanation of symbols

１ 給紙部
２ 原反フィルム
２Ａ 原反フィルムの巻取
２Ｂ 筒貼りしたフィルムの巻取
３ 塗布装置
４ 塗布層
６ 塗布層検知装置
７ 筒貼り部
８ 巻取部
１１ 照射手段
１２ 受光手段（ＣＣＤ撮像素子）
１３ 検知手段（画像処理装置）
１４ 支持ローラ
１５ 光源
１６ 光ファイバ DESCRIPTION OF SYMBOLS 1 Paper feeding part 2 Original film 2A Winding of original film 2B Winding of the film stuck on the cylinder 3 Coating device 4 Coating layer 6 Coating layer detection device 7 Tube sticking part 8 Winding part 11 Irradiation means 12 Light receiving means (CCD Image sensor)
13 Detection means (image processing device)
14 Support roller 15 Light source 16 Optical fiber

Claims (6)

連続的に走行している原反フィルムの幅方向の一部領域に、走行方向に延びる帯状に塗布されている塗布層の有無を検知する塗布層検知方法であって、前記連続的に走行している原反フィルムの、少なくとも前記塗布層の全幅を含んだ塗布層形成領域を、原反フィルムの走行方向にほぼ直角な面内で且つ原反フィルムに対して傾斜した方向からスポット光で照射する工程と、そのスポット光照射領域に塗布層が有る場合にその領域からの反射光が通る光路上に位置するが、塗布層がない場合にその領域からの反射光が通る光路からは外れた位置に配置した受光手段であって、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成された前記受光手段によって前記スポット光照射領域からの反射光を受光し、光入射を検知した画素の個数から塗布層の有無を検知する工程とを有する塗布層検知方法。 A coating layer detection method for detecting the presence or absence of a coating layer applied in a strip shape extending in the running direction in a partial region in the width direction of a continuously running raw film, wherein the continuous running A coating layer forming region including at least the entire width of the coating layer is irradiated with spot light in a plane substantially perpendicular to the running direction of the original film and from a direction inclined with respect to the original film. When the spot light irradiation area has a coating layer, it is located on the optical path through which reflected light from that area passes, but when there is no coating layer, it is off the optical path through which reflected light from that area passes. The light receiving means arranged at a position, the reflected light from the spot light irradiation region is received by the light receiving means constituted by a CCD image pickup device having a plurality of pixels in each of the vertical and horizontal directions, and the light incident is detected. Number Coating layer detection method and a step of detecting the presence or absence of the coating layer. 原反フィルムの巻取から原反フィルムを引き出し、連続的に走行させながら、該原反フィルムの端部に接着液を連続的に塗布する工程と、塗布によって形成した塗布層の有無を請求項１に記載の塗布層検知方法によって検知する工程と、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とする筒貼り工程と、筒貼りしたフィルムを巻き取る巻取り工程とを有する筒貼り方法。   The step of continuously applying an adhesive liquid to the end of the original film while drawing the original film from the winding of the original film and continuously running, and the presence or absence of a coating layer formed by application The step of detecting by the coating layer detection method according to 1; the cylinder pasting step in which both end portions of the raw film are overlapped and the overlapping portions are joined to form a cylinder; and the winding step of winding the cylinder pasted film A cylinder pasting method comprising: 更に、塗布層が無いと検知された部分に識別用のテープを付与する工程を有することを特徴とする請求項２記載の筒貼り方法。   The cylinder pasting method according to claim 2, further comprising a step of applying an identification tape to a portion detected as having no coating layer. 連続的に走行している原反フィルムの幅方向の一部領域に、走行方向に延びる帯状に塗布されている塗布層の有無を検知する塗布層検知装置であって、前記連続的に走行している原反フィルムの、少なくとも前記塗布層の全幅を含んだ塗布層形成領域を、原反フィルムの走行方向にほぼ直角な面内で且つ原反フィルムに対して傾斜した方向からスポット光で照射する照射手段と、そのスポット光照射領域に塗布層が有る場合にその領域からの反射光が通る光路上に位置するが、塗布層がない場合にその領域からの反射光が通る光路からは外れた位置に配置した受光手段であって、縦横にそれぞれ複数の画素を備えたＣＣＤ撮像素子で構成された前記受光手段と、該受光手段からの信号から光入射を検知した画素の個数を計数し、その個数から塗布層の有無を検知する検知手段とを有する塗布層検知装置。 A coating layer detecting device for detecting the presence or absence of a coating layer applied in a strip shape extending in the running direction in a partial region in the width direction of a continuously running raw film, A coating layer forming region including at least the entire width of the coating layer is irradiated with spot light in a plane substantially perpendicular to the running direction of the original film and from a direction inclined with respect to the original film. If there is a coating layer in the spot light irradiation area and the spot light irradiation area, it is located on the optical path through which the reflected light from that area passes, but if there is no coating layer, it is off the optical path through which the reflected light from that area passes. A light receiving means arranged at a predetermined position, the light receiving means comprising a CCD image sensor having a plurality of pixels in each of the vertical and horizontal directions, and the number of pixels in which light incidence is detected from a signal from the light receiving means. From that number Coating layer detecting apparatus having a detecting means for detecting the presence or absence of fabric layers. 原反フィルムの巻取をセットし、その巻取から原反フィルムを繰り出す給紙部と、連続的に走行中の原反フィルムの端部に接着液を連続的に塗布する塗布装置と、該塗布装置の下流に設けられ、該塗布装置によって原反フィルムの端部に形成した塗布層の有無を検知する請求項４に記載の塗布層検知装置と、その下流に配置され、原反フィルムの両端部を重ね合わせ、その重合部を接合して筒状とする筒貼り部と、筒貼りしたフィルムを巻き取る巻取部とを有する筒貼り装置。   A paper feeding unit for setting the winding of the raw film and feeding the raw film from the winding; a coating device for continuously applying an adhesive liquid to the end of the running raw film; The coating layer detection device according to claim 4, which is provided downstream of the coating device and detects the presence or absence of a coating layer formed at an end of the raw film by the coating device, and disposed downstream of the coating layer detection device. A cylinder pasting apparatus having a cylinder pasting portion that overlaps both end portions and joins the overlapping portions to form a cylinder, and a winding unit that winds the film pasted on the cylinder. 更に、筒貼り部の下流に、前記塗布層検知装置によって塗布層が無いと検知された部分に識別用のテープを付与するテープ付与装置を有することを特徴とする請求項５記載の筒貼り装置。   6. The cylinder sticking device according to claim 5, further comprising a tape applying device for applying an identification tape to a portion detected by the coating layer detecting device as having no coating layer downstream of the tube sticking portion. .
JP2004038896A 2004-02-16 2004-02-16 Coating layer detection method and apparatus, and cylinder pasting method and apparatus using the same Expired - Fee Related JP4502656B2 (en)

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