JP4953086B2 - PTP sheet inspection equipment - Google Patents

PTP sheet inspection equipment Download PDF

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JP4953086B2
JP4953086B2 JP2007278047A JP2007278047A JP4953086B2 JP 4953086 B2 JP4953086 B2 JP 4953086B2 JP 2007278047 A JP2007278047 A JP 2007278047A JP 2007278047 A JP2007278047 A JP 2007278047A JP 4953086 B2 JP4953086 B2 JP 4953086B2
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ptp sheet
illumination
illuminator
light
emitting surface
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JP2009103664A (en
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勝則 柴
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Kirin Techno System Co Ltd
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Kirin Techno System Co Ltd
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Description

本発明は、ＰＴＰシートのシール不良等を検査する装置に関する。   The present invention relates to an apparatus for inspecting a seal failure of a PTP sheet.

錠剤の包装体等として流通しているＰＴＰシート（Ｐｒｅｓｓ Ｔｈｒｏｕｇｈ Ｐａｃｋａｇｅ）は、樹脂シートに形成された多数のポケットに錠剤等の被包装物を収容し、裏面側から金属箔を溶着してポケットをシールした構成を有している。この種のＰＴＰシートの包装工程では金属箔の溶着不良等の検査が必要とされることがある。その検査方法としては、樹脂シートのポケット以外の平面部に形成される格子状の網目模様に着目し、ＰＴＰシートの画像上で網目模様が正しく存在するか否かを検査することにより、欠陥の有無を判別する方法が存在する。その検査方法に使用される装置としては、ＰＴＰシートの四隅に配置された照明器からＰＴＰシートに向かって斜め方向に照明光を照射し、照明されたＰＴＰシートを上方から撮影する検査装置が提案されている（例えば特許文献１参照）。
特開２００１−３４９８３７号公報 A PTP sheet (Press Through Package) that is distributed as a package for tablets, etc., contains packages such as tablets in a large number of pockets formed on a resin sheet, and metal foil is welded from the back side to form pockets. It has a sealed configuration. In the packaging process of this type of PTP sheet, it may be necessary to inspect for defective welding of the metal foil. As the inspection method, paying attention to the lattice-like mesh pattern formed on the flat surface portion other than the pocket of the resin sheet, and checking whether the mesh pattern is correctly present on the image of the PTP sheet, There is a method for determining the presence or absence. As an apparatus used for the inspection method, an inspection apparatus that irradiates illumination light obliquely toward the PTP sheet from the illuminators arranged at the four corners of the PTP sheet and photographs the illuminated PTP sheet from above is proposed. (For example, refer to Patent Document 1).
JP 2001-349837 A

一般に、ＰＴＰシートの網目模様は、矩形状のシートの各辺に対して斜め方向に形成されている。従って、従来の検査装置によれば、網目模様に対して照明光を平行及び直交する方向に照明することにより、網目模様を強調した画像を取得して検査精度を高めることができる。しかし、照明器がＰＴＰシートの各辺に対して斜めに傾けられているため、照明器からＰＴＰシートの各部までの距離に差が生じる。そのため、照明器から遠いシート中央部は暗く撮影され、照明器から近いシート周縁部は明るく撮影されて画像の明るさにムラが生じることがある。この場合、明るさのムラを低減するために照明角度を調整し、あるいは照明器の台数を増加させるといった対策を施す必要がある。   In general, the mesh pattern of the PTP sheet is formed in an oblique direction with respect to each side of the rectangular sheet. Therefore, according to the conventional inspection apparatus, by illuminating illumination light in a direction parallel to and orthogonal to the mesh pattern, an image in which the mesh pattern is emphasized can be acquired and the inspection accuracy can be increased. However, since the illuminator is inclined obliquely with respect to each side of the PTP sheet, a difference occurs in the distance from the illuminator to each part of the PTP sheet. For this reason, the center of the sheet far from the illuminator may be photographed darkly, and the peripheral edge of the sheet near the illuminator may be photographed brightly, resulting in uneven brightness of the image. In this case, it is necessary to take measures such as adjusting the illumination angle or increasing the number of illuminators in order to reduce unevenness in brightness.

そこで、本発明は明るさのムラを抑えつつＰＴＰシートの網目模様を強調した画像を取得することが可能な検査装置を提供することを目的とする。   Therefore, an object of the present invention is to provide an inspection apparatus capable of acquiring an image in which a mesh pattern of a PTP sheet is emphasized while suppressing unevenness in brightness.

本発明のＰＴＰシートの検査装置（１）は、ＰＴＰシート（２）の一辺（２ａ）と平行な方向に配列された複数の光源（１３）を有し、前記ＰＴＰシートと直交する方向から見たときに、各光源から前記一辺に対して斜めに傾いた方向の照明光を前記ＰＴＰシートに照射する照明手段（１０）と、照明されたＰＴＰシートを撮像する撮像手段（１１）とを備え、前記ＰＴＰシートの両側のそれぞれに前記照明手段が配置され、各照明手段は、前記一辺と長手方向とを一致させ、かつ発光面（１０ａ）の法線方向を前記ＰＴＰシートと直交する方向に一致させて配置される照明ボックス（１２）を有し、前記複数の光源のそれぞれは、前記照明ボックス内で前記発光面と平行な面に沿って２次元的に配列されるとともに、前記発光面の法線方向を含む直交３軸方向のいずれに対しても一様に傾いた方向に光軸を向けた状態で前記照明ボックス内に取り付けられ、前記撮像手段は、前記照明手段間の隙間上に配置されて前記ＰＴＰシートを前記直交する方向から撮影するように設けられることにより、上述した課題を解決する。 The PTP sheet inspection apparatus (1) of the present invention has a plurality of light sources (13) arranged in a direction parallel to one side (2a) of the PTP sheet (2), and is viewed from a direction orthogonal to the PTP sheet. Illuminating means (10) for irradiating the PTP sheet with illumination light in an oblique direction with respect to the one side from each light source, and imaging means (11) for imaging the illuminated PTP sheet. The illuminating means is disposed on each side of the PTP sheet, and each illuminating means has the one side aligned with the longitudinal direction, and the normal direction of the light emitting surface (10a) is perpendicular to the PTP sheet. A plurality of light sources arranged in a two-dimensional manner along a plane parallel to the light emitting surface in the lighting box, and the light emitting surface Normal direction of It is mounted in the illumination box in a state where the optical axis is oriented in a direction uniformly inclined with respect to any of the three orthogonal axis directions including the imaging means, and the imaging means is disposed in a gap between the illumination means and the Rukoto provided a PTP sheet to photograph from a direction the perpendicular, to solve the problems described above.

本発明の検査装置によれば、照明手段の各光源がＰＴＰシートの一辺と平行な方向に配列されているため、光源からＰＴＰシートの各部までの距離のばらつきを抑え、それにより、ＰＴＰシートの画像の明るさのムラを抑制することができる。しかも、ＰＴＰシートの一辺に対して斜めに傾いた方向の照明光を各光源からＰＴＰシートに照射しているため、ＰＴＰシートの網目模様を強調した画像を取得して検査の精度を高めることができる。   According to the inspection apparatus of the present invention, since each light source of the illumination means is arranged in a direction parallel to one side of the PTP sheet, variation in the distance from the light source to each part of the PTP sheet is suppressed. Unevenness of image brightness can be suppressed. In addition, since the illumination light in a direction inclined obliquely with respect to one side of the PTP sheet is emitted from each light source to the PTP sheet, it is possible to obtain an image in which the mesh pattern of the PTP sheet is emphasized to increase the inspection accuracy. it can.

本発明の検査装置によれば、ＰＴＰシートの両側かつ上方の領域にて、照明ボックスをその長手方向がＰＴＰシートの一辺と平行で、かつ発光面の法線方向がＰＴＰシートと直交する方向と一致するように配置することにより、ＰＴＰシートをその一辺に対して斜めに傾く方向から照明することができる。従って、照明手段の位置決め調整を容易に行うことができる。また、照明ボックスをＰＴＰシートの一辺と平行に配置しているので、照明ボックスの周辺への張り出しを抑えてその設置スペースを縮小することができる。 According to the inspection apparatus of the present invention, in the regions on both sides and above the PTP sheet, the illumination box has a longitudinal direction parallel to one side of the PTP sheet and a direction in which the normal direction of the light emitting surface is orthogonal to the PTP sheet; By arrange | positioning so that it may correspond, a PTP sheet can be illuminated from the direction which inclines diagonally with respect to the one side. Therefore, the positioning adjustment of the illumination means can be easily performed. In addition, since the lighting box is arranged in parallel with one side of the PTP sheet, the installation space can be reduced while suppressing the projection of the lighting box to the periphery.

前記複数の光源が、前記照明ボックス内で前記発光面と平行な面に沿って２次元的に配列されているので、照明ボックスを面状に発光させてＰＴＰシートの画像の明るさのムラをさらに抑えることができる。 Before SL plurality of light sources, because it is the light emitting surface and the two-dimensionally arranged along a plane parallel within the lighting box, unevenness of illumination box by planar light emission brightness of the PTP sheet image Can be further suppressed.

前記複数の光源は、前記一辺よりも長い範囲に亘って設けられているので、ＰＴＰシートの一辺と平行な方向に関する明るさのムラをより確実に排除することができる。 Before SL plurality of light sources, since provided over a long range than the one side, it is possible to more reliably eliminate the unevenness of the brightness related to one side in a direction parallel PTP sheet.

さらに、ＰＴＰシートをその両側の照明手段によって照明しつつ、照明手段間の隙間上に撮像手段を配置してＰＴＰシートをその正面から撮影することができる。 Furthermore, while illuminating the PTP sheet with the illumination means on both sides thereof, the imaging means can be arranged in the gap between the illumination means and the PTP sheet can be photographed from the front.

なお、以上の説明では本発明の理解を容易にするために添付図面の参照符号を括弧書きにて付記したが、それにより本発明が図示の形態に限定されるものではない。   In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

以上に説明したように、本発明によれば、光源からＰＴＰシートの各部までの距離のばらつきを抑え、それにより、ＰＴＰシートの画像の明るさのムラを抑制し、ＰＴＰシートの網目模様を強調した画像を取得して検査の精度を高めることができる。 As described above, according to the present invention, variation in the distance from the light source to each part of the PTP sheet is suppressed, thereby suppressing unevenness in the brightness of the image of the PTP sheet and emphasizing the mesh pattern of the PTP sheet. The acquired image can be acquired to improve the accuracy of the inspection.

図１〜図３は本発明の一形態に係る検査装置の正面図、図２はその側面図、図３は要部の平面図である。検査装置１は、搬送ラインＣによって搬送されるＰＴＰシート２を一対の照明器１０で照明し、その照明されたＰＴＰシート２の画像をＰＴＰシート２の直上に配置されたカメラ１１にて取得し、得られた画像に基づいてＰＴＰシート２の欠陥の有無を判別する。照明器１０が照明手段に、カメラ１１が撮像手段にそれぞれ相当する。カメラ１１はＰＴＰシート２をこれと直交する方向から撮影するように設けられ、照明器１０はカメラ１１の両側からＰＴＰシート２を照明する。   1 to 3 are front views of an inspection apparatus according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view of a main part. The inspection apparatus 1 illuminates the PTP sheet 2 conveyed by the conveyance line C with a pair of illuminators 10, and acquires an image of the illuminated PTP sheet 2 with a camera 11 arranged immediately above the PTP sheet 2. Based on the obtained image, the presence or absence of a defect in the PTP sheet 2 is determined. The illuminator 10 corresponds to the illumination means, and the camera 11 corresponds to the imaging means. The camera 11 is provided so as to photograph the PTP sheet 2 from a direction orthogonal thereto, and the illuminator 10 illuminates the PTP sheet 2 from both sides of the camera 11.

検査対象のＰＴＰシート２は、樹脂シート３に形成された多数のポケット３ａに錠剤等の被包装物４が収容され、樹脂シート３の裏面側からアルミ箔等の金属箔５が溶着されてポケット３ａがシールされた構成を有している。樹脂シート３と金属箔５とは、加熱ローラを樹脂シート３のポケット３ａを除く平面部に押し付けることにより相互に溶着されている。図３に示したように、ＰＴＰシート２には網目模様６が存在する。その網目模様６は、樹脂シート３と金属箔５との溶着過程で加熱ローラに施された網目状の凹凸が転写されることによって形成される。網目模様６は、ＰＴＰシート２の長辺２ａ、短辺２ｂのいずれに対しても概ね４５°の角度で傾いた方向に延びる多数の突条を格子状に組み合わせた構成を有している。搬送ラインＣ上においては、搬送方向（図３の左右方向）に対して長辺２ａが平行となる状態でＰＴＰシート２が搬送される。   The PTP sheet 2 to be inspected has a plurality of pockets 3a formed in the resin sheet 3 and a package 4 such as a tablet accommodated therein, and a metal foil 5 such as an aluminum foil is welded from the back side of the resin sheet 3 to the pocket. 3a has a sealed configuration. The resin sheet 3 and the metal foil 5 are welded to each other by pressing the heating roller against a flat portion excluding the pocket 3a of the resin sheet 3. As shown in FIG. 3, the PTP sheet 2 has a mesh pattern 6. The mesh pattern 6 is formed by transferring the mesh-like irregularities applied to the heating roller in the process of welding the resin sheet 3 and the metal foil 5. The mesh pattern 6 has a configuration in which a large number of protrusions extending in a direction inclined at an angle of approximately 45 ° with respect to both the long side 2a and the short side 2b of the PTP sheet 2 are combined in a lattice shape. On the transport line C, the PTP sheet 2 is transported with the long side 2a being parallel to the transport direction (left and right direction in FIG. 3).

図１に示したように、照明器１０は、搬送ラインＣの幅方向（図１の左右方向）の両側でかつ搬送ラインＣよりも上方において、その発光面１０ａの法線方向が鉛直下方に向くように配置されている。図３から明らかなように、照明器１０のそれぞれは、搬送ラインＣの搬送方向、すなわちＰＴＰシート２の長辺２ａと平行な方向とその長手方向とが一致するように配置されている。照明器１０の長手方向の全長はＰＴＰシート２の長手方向の全長よりも大きい。図３に矢印で示すように、カメラ１１による撮影方向（つまりＰＴＰシート２と直交する方向）から見て、各照明器１０はＰＴＰシート２の長辺２ａに対して斜めに傾いた方向の照明光をＰＴＰシート２に照射する。搬送方向に関する各照明器１０の発光面１０ａの長さはＰＴＰシート２の全長よりも長い。   As shown in FIG. 1, the illuminator 10 has a light emitting surface 10a whose normal direction is vertically downward on both sides in the width direction of the transport line C (left and right direction in FIG. 1) and above the transport line C. It is arranged to face. As apparent from FIG. 3, each of the illuminators 10 is arranged such that the conveyance direction of the conveyance line C, that is, the direction parallel to the long side 2 a of the PTP sheet 2 coincides with the longitudinal direction thereof. The total length of the illuminator 10 in the longitudinal direction is larger than the total length of the PTP sheet 2 in the longitudinal direction. As shown by the arrows in FIG. 3, each illuminator 10 is illuminated in a direction inclined obliquely with respect to the long side 2 a of the PTP sheet 2 when viewed from the photographing direction by the camera 11 (that is, the direction orthogonal to the PTP sheet 2). The PTP sheet 2 is irradiated with light. The length of the light emitting surface 10 a of each illuminator 10 in the transport direction is longer than the total length of the PTP sheet 2.

照明器１０を発光面１０ａ（図１及び図２の下面）側から見た状態を図４に示す。なお、以下では、照明器１０の長手方向をＸ軸方向、照明器１０の発光面１０ａと直交する方向をＺ軸方向と呼び、Ｘ軸方向及びＺ軸方向の両者と直交する方向をＹ軸方向と呼ぶことがある。照明器１０は、直方体容器状の照明ボックス１２の内部に、発光面１０ａを埋めるようにして、多数の白色ＬＥＤ１３を発光面１０ａと平行な面、つまりＸ軸方向及びＹ軸方向によって定義される面に沿ってマトリクス状に配列した構成を有している。各ＬＥＤ１３が光源に相当する。Ｘ軸方向に関して、ＬＥＤ１３が設けられている範囲はＰＴＰシート２の長辺２ａよりも長い。このようにＬＥＤ光源をマトリクス状に配列した照明器では、一般に、各ＬＥＤの光軸が発光面１０ａの法線方向（図示例ではＺ軸方向に相当する。）に向けられている。しかし、本形態の照明器１０においては、図５及び図６に示したように、各ＬＥＤ１３の光軸ＯＡが、Ｘ、Ｙ、Ｚ軸方向のいずれに対しても斜めに傾けられている。なお、図５及び図６においては、光軸ＯＡをＺ軸方向に向けたときのＬＥＤ１３′を想像線で示している。各ＬＥＤ１３の傾きは互いに等しい。つまり、ＬＥＤ１３の光軸ＯＡは直交３軸方向（Ｘ軸、Ｙ軸及びＺ軸方向）のいずれに対しても一様に傾けられており、それらの光軸ＯＡは互いに平行である。ＬＥＤ１３の光軸ＯＡのＸ軸方向及びＹ軸方向に対する傾斜角は、ＰＴＰシート２の長辺２ａに対する網目模様６の傾き角（４５°）と同一又はその近傍の値に設定すればよい。光軸ＯＡのＺ軸方向に対する傾斜角は、ＰＴＰシート２と照明器１０との鉛直方向の距離に応じて適宜に定めればよい。   FIG. 4 shows a state in which the illuminator 10 is viewed from the light emitting surface 10a (the lower surface in FIGS. 1 and 2). Hereinafter, the longitudinal direction of the illuminator 10 is referred to as the X-axis direction, the direction orthogonal to the light emitting surface 10a of the illuminator 10 is referred to as the Z-axis direction, and the direction orthogonal to both the X-axis direction and the Z-axis direction is referred to as the Y-axis. Sometimes called direction. The illuminator 10 is defined by a plane parallel to the light emitting surface 10a, that is, the X-axis direction and the Y-axis direction so that the light emitting surface 10a is embedded in the rectangular box-shaped lighting box 12. It has a configuration arranged in a matrix along the surface. Each LED 13 corresponds to a light source. Regarding the X-axis direction, the range in which the LEDs 13 are provided is longer than the long side 2 a of the PTP sheet 2. Thus, in the illuminator in which the LED light sources are arranged in a matrix, the optical axis of each LED is generally directed in the normal direction of the light emitting surface 10a (corresponding to the Z-axis direction in the illustrated example). However, in the illuminator 10 of this embodiment, as shown in FIGS. 5 and 6, the optical axis OA of each LED 13 is inclined obliquely with respect to any of the X, Y, and Z axis directions. In FIGS. 5 and 6, the LED 13 ′ when the optical axis OA is directed in the Z-axis direction is indicated by an imaginary line. The inclination of each LED 13 is equal to each other. That is, the optical axis OA of the LED 13 is uniformly inclined with respect to any of the three orthogonal directions (X-axis, Y-axis, and Z-axis directions), and the optical axes OA are parallel to each other. The inclination angle of the optical axis OA of the LED 13 with respect to the X-axis direction and the Y-axis direction may be set to a value that is the same as or close to the inclination angle (45 °) of the mesh pattern 6 with respect to the long side 2a of the PTP sheet 2. The inclination angle of the optical axis OA with respect to the Z-axis direction may be appropriately determined according to the vertical distance between the PTP sheet 2 and the illuminator 10.

上記のように構成された照明器１０は、そのＸ軸方向が搬送方向と一致し、Ｚ軸方向と鉛直方向とが一致するようにして搬送ラインＣの両側に対称的に設置される。つまり、照明器１０はそれらの長手方向がＰＴＰシート２の長辺２ａと平行となるように、かつ、カメラ１１の撮影方向から見て、それぞれの照明方向が互いに向かう合うように位置決めされる。これにより、図３に示したように、ＰＴＰシート２をその網目模様６と概略平行な方向及び直交する方向から照明することができる。照明器１０の照明光にて照射されたＰＴＰシート２の像をカメラ１１にて撮影することにより、網目模様６が強調された画像を取得することができる。取得された画像上で網目模様６の像に欠陥が存在するか否かを所定のアルゴリズムに従って検査することにより、金属箔５の接着不良といったＰＴＰシート２の結果を正しく判定することができる。なお、欠陥検出のためのアルゴリズム、画像処理等は従来の検査装置と同様でよい。カメラ１１の撮影光学系には、偏向フィルタ等の光学要素を必要に応じて設けてよい。照明器１０からの照明光の光路に関しても同様である。   The illuminator 10 configured as described above is symmetrically installed on both sides of the conveyance line C so that the X-axis direction coincides with the conveyance direction and the Z-axis direction coincides with the vertical direction. That is, the illuminators 10 are positioned so that their longitudinal directions are parallel to the long side 2a of the PTP sheet 2 and the respective illumination directions face each other when viewed from the photographing direction of the camera 11. Thereby, as shown in FIG. 3, the PTP sheet 2 can be illuminated from a direction substantially parallel to the mesh pattern 6 and a direction orthogonal thereto. By capturing an image of the PTP sheet 2 irradiated with the illumination light of the illuminator 10 with the camera 11, an image in which the mesh pattern 6 is emphasized can be acquired. By examining whether or not there is a defect in the image of the mesh pattern 6 on the acquired image according to a predetermined algorithm, it is possible to correctly determine the result of the PTP sheet 2 such as poor adhesion of the metal foil 5. Note that an algorithm for detecting a defect, image processing, and the like may be the same as those of a conventional inspection apparatus. The photographing optical system of the camera 11 may be provided with an optical element such as a deflection filter as necessary. The same applies to the optical path of the illumination light from the illuminator 10.

本形態の検査装置１によれば、照明器１０の光源であるＬＥＤ１３がＰＴＰシート２の長辺２ａと平行な方向に配列されているため、ＰＴＰシート２の各部の光源からの距離が均一化される。よって、ＰＴＰシート２をほぼ全面に亘って等しい明るさで照明して画像の明るさのムラを抑制することができる。また、照明器１０のＸ軸方向、すなわちＬＥＤ１３の配列方向とＰＴＰシート２の長辺２ａとを平行に位置決めすれば、その後は照明器１０の鉛直方向の位置を調整するだけで適切な照明が得られるので、照明器１０の位置調整が容易である。さらに、図５及び図６に想像線で示したＬＥＤ１３′を備えた従来型の照明器にてＰＴＰシート２を網目模様６と概略平行及び直交する方向に照明するためには、図３に想像線で示したように、ＰＴＰシート２の隅部に照明器１０′を傾けて配置する必要がある。この場合と比較して、照明器１０の設置スペースが図中の矩形領域Ａへと縮小される利点もある。   According to the inspection apparatus 1 of the present embodiment, since the LEDs 13 that are the light sources of the illuminator 10 are arranged in a direction parallel to the long side 2a of the PTP sheet 2, the distances from the light sources of the respective parts of the PTP sheet 2 are made uniform. Is done. Therefore, it is possible to illuminate the PTP sheet 2 with substantially the same brightness over the entire surface, and suppress unevenness in the brightness of the image. Further, if the X-axis direction of the illuminator 10, that is, the arrangement direction of the LEDs 13 and the long side 2 a of the PTP sheet 2 are positioned in parallel, the appropriate illumination can be obtained simply by adjusting the position of the illuminator 10 in the vertical direction. As a result, the position of the illuminator 10 can be easily adjusted. Further, in order to illuminate the PTP sheet 2 in a direction substantially parallel and perpendicular to the mesh pattern 6 with a conventional illuminator provided with the LED 13 'shown by imaginary lines in FIGS. As indicated by the lines, it is necessary to place the illuminator 10 ′ at an angle at the corner of the PTP sheet 2. Compared to this case, there is an advantage that the installation space of the illuminator 10 is reduced to a rectangular area A in the drawing.

本発明は上述した形態に限ることなく、適宜の形態にて実施してよい。例えば、光源の配列は、ＰＴＰシート２の一辺と平行な方向に配列されている限りにおいて適宜に変更してもよい。例えば、発光面１０ａと平行な面に沿って多数の光源を２次元的に配列する場合、それらの光源の配列は、マトリクス状に代えて千鳥状であってもよい。ＰＴＰシートの一辺と平行な方向に単列で光源が配列されてもよい。光源は白色ＬＥＤに限ることなく、適宜の光源を利用してよい。本形態ではＰＴＰシート２の長辺２ａと平行な方向に光源を配列しているが、短辺２ｂと平行な方向に光源が配列されてもよい。単一の照明器をＰＴＰシートの片側に配置し、その照明光で照明されたＰＴＰシートを反対側からカメラで撮像してもよい。   The present invention is not limited to the form described above, and may be implemented in an appropriate form. For example, the arrangement of the light sources may be appropriately changed as long as it is arranged in a direction parallel to one side of the PTP sheet 2. For example, when a large number of light sources are two-dimensionally arranged along a plane parallel to the light emitting surface 10a, the arrangement of the light sources may be a staggered pattern instead of a matrix. The light sources may be arranged in a single row in a direction parallel to one side of the PTP sheet. The light source is not limited to a white LED, and an appropriate light source may be used. In this embodiment, the light sources are arranged in a direction parallel to the long side 2a of the PTP sheet 2, but the light sources may be arranged in a direction parallel to the short side 2b. A single illuminator may be arranged on one side of the PTP sheet, and the PTP sheet illuminated with the illumination light may be imaged by the camera from the opposite side.

本発明の一形態に係る検査装置の正面図。The front view of the inspection device concerning one form of the present invention. 図１の検査装置の側面図。The side view of the inspection apparatus of FIG. 図１の検査装置の要部の平面図。The top view of the principal part of the inspection apparatus of FIG. 照明器を下面側から見た状態を示す図。The figure which shows the state which looked at the illuminator from the lower surface side. 鉛直方向に対するＬＥＤの傾きを示す図。The figure which shows the inclination of LED with respect to a perpendicular direction. 水平方向に対するＬＥＤの傾きを示す図。The figure which shows the inclination of LED with respect to a horizontal direction.

符号の説明Explanation of symbols

１ 検査装置
２ ＰＴＰシート
２ａ ＰＴＰシートの長辺
６ 網目模様
１０ 照明器（照明手段）
１１ カメラ（撮像手段）
１２ 照明ボックス
１３ ＬＥＤ（光源） DESCRIPTION OF SYMBOLS 1 Inspection apparatus 2 PTP sheet 2a Long side of PTP sheet 6 Mesh pattern 10 Illuminator (illumination means)
11 Camera (imaging means)
12 Lighting box 13 LED (light source)

Claims (2)

ＰＴＰシートの一辺と平行な方向に配列された複数の光源を有し、前記ＰＴＰシートと直交する方向から見たときに、各光源から前記一辺に対して斜めに傾いた方向の照明光を前記ＰＴＰシートに照射する照明手段と、照明されたＰＴＰシートを撮像する撮像手段とを備え、
前記ＰＴＰシートの両側のそれぞれに前記照明手段が配置され、
各照明手段は、前記一辺と長手方向とを一致させ、かつ発光面の法線方向を前記ＰＴＰシートと直交する方向に一致させて配置される照明ボックスを有し、
前記複数の光源のそれぞれは、前記照明ボックス内で前記発光面と平行な面に沿って２次元的に配列されるとともに、前記発光面の法線方向を含む直交３軸方向のいずれに対しても一様に傾いた方向に光軸を向けた状態で前記照明ボックス内に取り付けられ、
前記撮像手段は、前記照明手段間の隙間上に配置されて前記ＰＴＰシートを前記直交する方向から撮影するように設けられていることを特徴とするＰＴＰシートの検査装置。 A plurality of light sources arranged in a direction parallel to one side of the PTP sheet, and when viewed from a direction perpendicular to the PTP sheet, illumination light in a direction inclined obliquely with respect to the one side from each light source Illuminating means for irradiating the PTP sheet, and imaging means for imaging the illuminated PTP sheet ,
The illumination means is disposed on each side of the PTP sheet,
Each illumination means has an illumination box arranged so that the one side and the longitudinal direction coincide with each other and the normal direction of the light emitting surface coincides with a direction orthogonal to the PTP sheet,
Each of the plurality of light sources is two-dimensionally arranged along a plane parallel to the light emitting surface in the illumination box, and with respect to any of the three orthogonal axes including the normal direction of the light emitting surface. Is also installed in the lighting box with the optical axis oriented in a uniformly inclined direction,
The PTP sheet inspection apparatus , wherein the imaging unit is disposed in a gap between the illuminating units so as to photograph the PTP sheet from the orthogonal direction . 前記複数の光源が前記一辺よりも長い範囲に亘って設けられていることを特徴とする請求項１に記載の検査装置。   The inspection apparatus according to claim 1, wherein the plurality of light sources are provided over a range longer than the one side.
JP2007278047A 2007-10-25 2007-10-25 PTP sheet inspection equipment Expired - Fee Related JP4953086B2 (en)

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