JP2006282372A - Method and device for controlling carrying trajectory of composite sheet - Google Patents

Method and device for controlling carrying trajectory of composite sheet Download PDF

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JP2006282372A
JP2006282372A JP2005108213A JP2005108213A JP2006282372A JP 2006282372 A JP2006282372 A JP 2006282372A JP 2005108213 A JP2005108213 A JP 2005108213A JP 2005108213 A JP2005108213 A JP 2005108213A JP 2006282372 A JP2006282372 A JP 2006282372A
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composite sheet
trajectory
sheet
boundary
detected
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JP4376201B2 (en
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Akihiro Ebihara
明浩 海老原
Makoto Kokubo
真 小久保
Yasuhiro Kizawa
康弘 鬼沢
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Kao Corp
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Kao Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/512—Marks, e.g. invisible to the human eye; Patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/42—Cameras

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for controlling carrying trajectory of a composite sheet, suppressing fluctuation in boundary part between a lap part and a non-lap part of the composite sheet to stably carry the composite sheet. <P>SOLUTION: The present injection controls a trajectory in carrying the composite sheet 10, which are formed by joining a plurality of strip-shaped sheets 101, 102 through the lap parts, along a longitudinal direction. A boundary part 100 between the lap part 10A and the non-lap part 10B of the carried composite sheet 10 is detected, and the carrying trajectory of the composite sheet 10 is controlled upstream of a detection position of the boundary part 100, based on the shift of the detected boundary part 100 from a reference position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、複数の帯状のシートがラップ部を介して接合された複合シートの搬送軌道の制御方法及び装置に関する。   The present invention relates to a method and an apparatus for controlling a conveyance trajectory of a composite sheet in which a plurality of belt-like sheets are joined via a lap portion.

帯状のシートをその長手方向に沿って搬送するときの軌道の制御方法に関する従来技術として、下記特許文献１に記載の技術が知られている。この技術は、搬送されてくるシートの両側端部の両面に投光器と受光器をそれぞれ対向させて配設し、前記投光器から投光される光の前記受光器による受光量が略同じになるようにシートの搬送軌道を制御し、所望の搬送ラインの中心とシートの幅方向の中心とが一致するようにしてシートの安定的な搬送を図っている。   As a prior art relating to a method for controlling a trajectory when a belt-like sheet is conveyed along its longitudinal direction, a technique described in Patent Document 1 below is known. In this technique, a light projector and a light receiver are arranged opposite to each other on both sides of the conveyed sheet so that the amount of light emitted from the light projector is substantially the same. In addition, the sheet conveyance trajectory is controlled so that the center of the desired conveyance line and the center in the width direction of the sheet coincide with each other to stably convey the sheet.

特開２００４−４３１７９号公報JP 2004-43179 A

ところで、上述の技術は、検出したシートの両端部の位置に基づいてシートの搬送軌道を制御しているので、単層のシートの場合には、ロットの違いによるシート幅の変動にかかわらず、搬送ラインの中心とシートの幅方向の中心とを一致させるように搬送軌道を修正して搬送することができるが、搬送するシートがラップ部を介して複数のシートが接合された複合シートである場合には、当該複合シートを構成するシートの幅にロットによる変動があると、当該複合シートの幅が変動することにより、ラップ部と非ラップ部の境界部の位置が変動してしまい、その後の下流での加工に悪影響を及ぼす場合があった。   By the way, since the above-described technique controls the sheet transport trajectory based on the detected positions of both ends of the sheet, in the case of a single-layer sheet, regardless of the variation in the sheet width due to the difference in lots, The conveyance path can be corrected and conveyed so that the center of the conveyance line and the center in the width direction of the sheet coincide with each other, but the sheet to be conveyed is a composite sheet in which a plurality of sheets are bonded via a lap portion. In this case, if the width of the sheet constituting the composite sheet varies depending on the lot, the position of the boundary portion between the wrap portion and the non-wrap portion varies due to the variation of the width of the composite sheet, and thereafter In some cases, it may adversely affect the downstream processing.

本発明は、上記課題に鑑みてなされたものであり、複合シートをそのラップ部と非ラップ部の境界部の位置の変動を抑えて安定的に搬送することができる複合シートの搬送軌道の制御方法及び装置を提供することを目的とする。   The present invention has been made in view of the above problems, and controls the conveyance path of a composite sheet that can stably convey the composite sheet while suppressing fluctuations in the position of the boundary between the wrap portion and the non-wrap portion. It is an object to provide a method and apparatus.

本発明は、複数の帯状のシートがラップ部を介して接合された複合シートを長手方向に沿って搬送するときの軌道を制御する方法であって、搬送されてくる前記複合シートにおけるラップ部と非ラップ部との境界部を検出し、検出された該境界部の基準位置からのずれに基づいて前記複合シートの搬送軌道を該境界部の検出位置の上流において制御する複合シートの搬送軌道の制御方法を提供することにより、前記目的を達成したものである。   The present invention is a method for controlling a trajectory when a composite sheet in which a plurality of strip-shaped sheets are joined via a wrap part is transported along the longitudinal direction, the wrap part in the composite sheet being transported, Detecting a boundary portion with the non-wrapped portion, and controlling a composite sheet conveyance trajectory upstream of the detection position of the boundary portion based on the detected deviation from the reference position of the boundary portion. The object is achieved by providing a control method.

また、本発明は、上記本発明の複合シートの搬送軌道の制御方法を実施するための装置であって、長手方向に搬送されてくる前記複合シートの前記境界部を検出する検出手段と、前記複合シートの搬送軌道における前記検出手段の上流に配され該搬送軌道を変更する軌道変更手段と、前記検出手段で検出された前記境界部の基準位置からのずれを求めるとともに該ずれに基づいて前記軌道変更手段を作動させて前記複合シートの搬送軌道を制御する制御手段とを備えている複合シートの搬送軌道の制御装置を提供するものである。   Further, the present invention is an apparatus for carrying out the above-described method for controlling the conveyance path of the composite sheet according to the present invention, the detection means for detecting the boundary portion of the composite sheet conveyed in the longitudinal direction, A trajectory changing unit disposed upstream of the detection unit in the conveyance trajectory of the composite sheet, and a deviation from a reference position of the boundary detected by the detection unit is obtained, and the deviation is determined based on the deviation. The present invention provides a control device for a composite sheet transport path, comprising control means for operating a track change means to control the transport path of the composite sheet.

本発明によれば、複合シートを構成するシートの幅の変動にかかわらず、境界部の位置を検出して複合シートの位置を制御しながら安定的に搬送することができる。   According to the present invention, it is possible to stably convey the sheet while detecting the position of the boundary portion and controlling the position of the composite sheet regardless of the variation in the width of the sheet constituting the composite sheet.

以下、本発明をその好ましい実施形態に基づいて、図面を参照しながら説明する。   Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

図１は、本発明の複合シートの搬送軌道の制御装置（以下、単に制御装置ともいう。）を、吸収性物品に用いられる複合シートの搬送に適用した一実施形態を模式的に示すものである。図１において、符号１は制御装置、１０は複合シートを示している。   FIG. 1 schematically shows an embodiment in which a composite sheet conveyance trajectory control device (hereinafter also simply referred to as a control device) of the present invention is applied to conveyance of a composite sheet used in an absorbent article. is there. In FIG. 1, reference numeral 1 denotes a control device, and 10 denotes a composite sheet.

本実施形態の制御装置１は、コンベアー１１で搬送される吸収体１２に上方から合流するように搬送される複合シート１０の搬送軌道を制御するものである。複合シート１０は、中央に配される表面シート（一のシート）１０１の両側部にラップ部１０Ａ（図２（ａ）参照）を介して側面シート（他のシート）１０２がそれぞれ接合されている。   The control apparatus 1 of this embodiment controls the conveyance track | orbit of the composite sheet 10 conveyed so that it may merge with the absorber 12 conveyed with the conveyor 11 from upper direction. In the composite sheet 10, side sheets (other sheets) 102 are respectively joined to both side portions of a top sheet (one sheet) 101 arranged in the center via a wrap portion 10 </ b> A (see FIG. 2A). .

制御装置１は、長手方向に搬送されてくる複合シート１０の境界部１００を検出する検出手段２と、複合シート１０の搬送軌道における検出手段２の上流に配され該搬送軌道を変更する軌道変更手段３と、検出手段２で検出された境界部１００の基準位置からのずれを求めるとともに該ずれに基づいて軌道変更手段３を作動させて複合シート１０の搬送軌道を制御する制御手段４と、表示・設定手段５とを備えている。   The control device 1 includes a detection unit 2 that detects the boundary portion 100 of the composite sheet 10 that is conveyed in the longitudinal direction, and a trajectory change that is arranged upstream of the detection unit 2 in the conveyance trajectory of the composite sheet 10 and changes the conveyance trajectory. Means 3 and control means 4 for obtaining a deviation from the reference position of the boundary portion 100 detected by the detection means 2 and operating the trajectory changing means 3 based on the deviation to control the conveyance trajectory of the composite sheet 10; Display / setting means 5.

検出手段２は、複合シート１０のラップ部１０Ａ及び非ラップ部１０Ｂの表面を所定の画角で撮像するＣＣＤ（電荷結合素子）カメラ（撮像機）２１と、複合シート１０のＣＣＤカメラ２１による撮像部分を裏側から照らす照明器２２と、ＣＣＤカメラ２１で撮像された画像データを受け取って画像処理を行い境界部１００の位置を検出する画像処理装置２３とを備えている。   The detection means 2 includes a CCD (charge coupled device) camera (imager) 21 that images the surface of the wrap portion 10A and the non-wrap portion 10B of the composite sheet 10 at a predetermined angle of view, and an image of the composite sheet 10 by the CCD camera 21. An illuminator 22 that illuminates the portion from the back side, and an image processing device 23 that receives image data captured by the CCD camera 21 and performs image processing to detect the position of the boundary portion 100 are provided.

軌道変更手段３は、複合シート１０が巻回される軌道制御ロール３１と、軌道制御ロール３１の位置を制御する制御モーター３２とを備えている。軌道制御ロール３１は、フレーム３１１に所定間隔を置いて支持された二本のフリーロール３１２を備えている。制御モーター３２は、複合シート１０の長手方向に対して軌道制御ロール３１の向きを変えることで、複合シート１０の搬送軌道を制御する。   The track changing means 3 includes a track control roll 31 around which the composite sheet 10 is wound, and a control motor 32 that controls the position of the track control roll 31. The track control roll 31 includes two free rolls 312 supported on the frame 311 at a predetermined interval. The control motor 32 controls the conveyance track of the composite sheet 10 by changing the direction of the track control roll 31 with respect to the longitudinal direction of the composite sheet 10.

制御手段４は、画像処理装置２３で検出された境界部の位置データを制御手段４に応じたアナログ信号に変換する信号変換機能を有するシーケンサー（以下、単にシーケンサーともいう）４１と、シーケンサー４１から出力されるアナログ信号に基づいて制御モーター３２を制御するコントローラー４２とを備えている。   The control unit 4 includes a sequencer 41 (hereinafter also simply referred to as a sequencer) 41 having a signal conversion function for converting the position data of the boundary detected by the image processing device 23 into an analog signal corresponding to the control unit 4. And a controller 42 for controlling the control motor 32 based on the output analog signal.

表示・設定手段５は、画像処理装置２３で処理された画像を表示する画面を備えるとともにシーケンサー４１の設定を行う設定装置を備えている。   The display / setting unit 5 includes a screen for displaying an image processed by the image processing device 23 and a setting device for setting the sequencer 41.

次に、本発明の複合シートの搬送軌道の制御方法の好ましい実施形態を、制御装置１を使用した複合シート１０の搬送軌道の制御方法に基づいて説明する。   Next, a preferred embodiment of the method for controlling the conveyance path of the composite sheet of the present invention will be described based on the method for controlling the conveyance path of the composite sheet 10 using the control device 1.

本実施形態の制御方法においては、先ず、図１に示すように、複合シート１０の搬送経路に制御装置１を配置する。そして、予め上流において表面シート１０１及び側部シート１０２が接合されてから搬送されてくる複合シート１０におけるラップ部１０Ａと非ラップ部１０Ｂとの境界部１００（図２（ａ）参照）を検出手段２で検出する。具体的には、軌道制御ロール３１を経て送られてくる複合シート１０のラップ部１０Ａと非ラップ部１０Ｂを含む撮像部分を裏側から照明器２２で照らした状態で、当該撮像部分の表面をＣＣＤカメラ２１で撮像する。   In the control method of the present embodiment, first, as shown in FIG. 1, the control device 1 is arranged on the conveyance path of the composite sheet 10. Then, the detection unit detects a boundary portion 100 (see FIG. 2A) between the wrap portion 10A and the non-wrap portion 10B in the composite sheet 10 that is conveyed after the surface sheet 101 and the side sheet 102 are joined upstream in advance. 2 to detect. Specifically, the surface of the imaging portion including the wrap portion 10A and the non-wrap portion 10B of the composite sheet 10 sent via the trajectory control roll 31 is illuminated by the illuminator 22 from the back side. An image is taken with the camera 21.

表面シート１０１及び側部シート１０２の材質には、従来から吸収性物品に用いられているシートを特に制限なく用いることができる。   As the material for the top sheet 101 and the side sheet 102, a sheet conventionally used for absorbent articles can be used without particular limitation.

表面シート１０１と側部シート１０２の接合方法に特に制限はないが、ラップ部１０Ａの密着による境界部１００の安定検出を考慮するとホットメルト等の接着剤またはヒートシールによる接合方法が好ましい。   Although there is no restriction | limiting in particular in the joining method of the surface sheet 101 and the side part sheet | seat 102, when the stability detection of the boundary part 100 by adhesion | attachment of 10 A of wrap parts is considered, the joining method by adhesives, such as hot melt, or heat seal is preferable.

境界部１００の検出は、ＣＣＤカメラ２１で撮像されたラップ部１０Ａ及び非ラップ部１０Ｂの位置情報に基づいて画像処理装置２３で行われる。具体的には、図２（a）のように、所定の画角で撮像された撮像領域１３（複合シート１０の幅方向位置ｘ、長さ方向位置ｙ）が、ＣＣＤカメラ２１の画素数分の画素データ（０〜２５５階調）で表され、例えば撮像領域１３のｙ方向任意の１画素に対する撮像領域１３内のｘ方向の画素データは、図２（ｂ）に示すようなグラフで表される。図２（ｂ）においては、画像として暗いラップ部１０Ａの画素データの数値は大きく、非ラップ部１０Ｂはラップ部１０Ａの画素データの数値よりも小さい。このような撮像領域に対し、境界部１００を検出するために特定の検査領域を設ける。本実施形態では、図２（ａ）に示したように、このような検査領域を二つの境界部に対応して左側検査領域１３０、右側検査領域１３１を設ける。次に、図３（ａ）及び図３（ｂ）に示されるような、これら両検査領域１３０、１３１のｙ方向任意の１画素に対する両検査領域１３０、１３１のｘ方向の画素データを求め、両検査領域１３０、１３１のｙ方向幅の画素数に相当する数のグラフ（図３（ａ）及び図３（ｂ）は、その中の一つ）を積算平均化した上で微分し、図３（ｃ）及び図３（ｄ）に示されるように、微分結果の最大最小値を±１００％となるようにデータ変換する。そして、境界部１００を特定するために設定された閾値に基づいて境界部１００の位置データを求める。制御装置１では、このような境界部の位置データの算出を所定間隔おきに行う。   The detection of the boundary portion 100 is performed by the image processing device 23 based on the positional information of the wrap portion 10A and the non-wrap portion 10B captured by the CCD camera 21. Specifically, as shown in FIG. 2A, the imaging region 13 (width direction position x, length direction position y of the composite sheet 10) captured at a predetermined angle of view is the number of pixels of the CCD camera 21. For example, the pixel data in the x direction in the imaging region 13 for any one pixel in the y direction in the imaging region 13 is represented by a graph as shown in FIG. 2B. Is done. In FIG. 2B, the numerical value of the pixel data of the dark wrap portion 10A as the image is large, and the non-wrapped portion 10B is smaller than the numerical value of the pixel data of the wrap portion 10A. For such an imaging region, a specific inspection region is provided in order to detect the boundary portion 100. In the present embodiment, as shown in FIG. 2A, a left inspection area 130 and a right inspection area 131 are provided corresponding to two boundary portions of such an inspection area. Next, as shown in FIG. 3A and FIG. 3B, pixel data in the x direction of both inspection regions 130 and 131 for one arbitrary pixel in the y direction of both inspection regions 130 and 131 are obtained. A graph of a number corresponding to the number of pixels in the y-direction width of both inspection regions 130 and 131 (FIG. 3A and FIG. 3B is one of them) is averaged and differentiated. As shown in FIG. 3 (c) and FIG. 3 (d), data conversion is performed so that the maximum and minimum values of the differentiation result are ± 100%. And the position data of the boundary part 100 are calculated | required based on the threshold value set in order to identify the boundary part 100. FIG. In the control device 1, the calculation of the boundary position data is performed at predetermined intervals.

次に、左側検査領域１３０及び右側検査領域１３１で検出された境界部１００の位置データは、シーケンサー４１を介してコントローラー４２に応じたアナログ信号に変換される。   Next, the position data of the boundary portion 100 detected in the left inspection region 130 and the right inspection region 131 is converted into an analog signal corresponding to the controller 42 via the sequencer 41.

境界部１００の基準位置からのずれは、シーケンサー４１を介して入力された境界部１００の位置情報に基づいてコントローラー４２で算出される。具体的には、検査領域が一つであれば、シーケンサー４１を介して得られた境界部１００の位置と基準位置の差を算出して基準位置からのずれを求めるが、左側検査領域１３０と右側検査領域１３１のように検査領域が二つであれば、各々の基準位置からのずれを求めてそれらを平均化する（加算して２で割る）ことで得られる。   The deviation of the boundary portion 100 from the reference position is calculated by the controller 42 based on the position information of the boundary portion 100 input via the sequencer 41. Specifically, if there is only one inspection area, the difference between the position of the boundary portion 100 obtained via the sequencer 41 and the reference position is calculated to obtain a deviation from the reference position. If there are two inspection areas, such as the right inspection area 131, the deviation from each reference position is obtained and averaged (added and divided by 2).

そして、コントローラー４２は、上述のようにして求めた境界部１００のずれに基づいて、制御モーター３２を作動させ、前記ずれに応じて複合シート１０の長手方向に対して軌道制御ロール３１の向きを変えて、複合シート１０の搬送軌道を制御し、複合シート１０を図２（ａ）のｘ方向に移動させて補正する。   Then, the controller 42 operates the control motor 32 based on the deviation of the boundary portion 100 obtained as described above, and changes the direction of the trajectory control roll 31 with respect to the longitudinal direction of the composite sheet 10 according to the deviation. In other words, the conveyance trajectory of the composite sheet 10 is controlled, and the composite sheet 10 is moved in the x direction in FIG.

本実施形態の制御装置１及びこれを用いた複合シートの搬送軌道の制御方法によれば、以下の効果が奏される。
複合シートの左右の端部を構成するシートの幅が変動したり、めくれが発生しても、複合シートの境界部の位置を正確に検出することができるので、当該複合シートと合流される吸収体や別のシートに対して複合シートを構成している中央のシートを高精度に位置決めしながら搬送することができる。 According to the control device 1 of the present embodiment and the control method of the conveyance path of the composite sheet using the same, the following effects are exhibited.
Even if the width of the sheet constituting the left and right end portions of the composite sheet fluctuates or turns, the position of the boundary portion of the composite sheet can be detected accurately, so that the absorption merged with the composite sheet The central sheet constituting the composite sheet with respect to the body or another sheet can be conveyed while positioning with high accuracy.

また、複合シートの境界部を二次元で検出するため、複合シートを構成している各シートの厚みの変動や材料むらの影響を抑えることができる。よって、当該複合シートと合流される吸収体や別のシートに対して複合シートを構成している中央のシートを高精度に位置決めしながら搬送することができる。   In addition, since the boundary portion of the composite sheet is detected in two dimensions, it is possible to suppress the variation in thickness of each sheet constituting the composite sheet and the influence of material unevenness. Therefore, it is possible to convey the central sheet constituting the composite sheet with high accuracy with respect to the absorber or another sheet joined with the composite sheet.

さらに、境界部として二つの側部シート１０２の端部を検出しているので、表面シート１０１の露出幅、即ち吸収性物品の吸収面の幅の検査も行うことができる。   Furthermore, since the end portions of the two side sheets 102 are detected as the boundary portions, the exposed width of the top sheet 101, that is, the width of the absorbent surface of the absorbent article can be inspected.

さらに、画像処理装置２３の画像をモニタしながら、表示・設定手段５を介して信号変換機能を有するシーケンサー４１の設定を変更することで、複合シート１０の搬送位置を変えることができる。   Furthermore, the conveyance position of the composite sheet 10 can be changed by changing the setting of the sequencer 41 having a signal conversion function via the display / setting unit 5 while monitoring the image of the image processing device 23.

また、本実施形態の装置は、従来の装置の検出手段を検出手段２及びシーケンサー４１に変更するだけで構成することができるので、装置の作製コストを軽減することができる。   In addition, since the apparatus of the present embodiment can be configured only by changing the detection means of the conventional apparatus to the detection means 2 and the sequencer 41, the manufacturing cost of the apparatus can be reduced.

本発明の複合シートの搬送軌道の制御方法及び装置は、前記実施形態に制限されない。   The method and apparatus for controlling the conveyance path of the composite sheet of the present invention are not limited to the above embodiment.

前記実施形態の制御装置１及び制御方法では、検出手段として光学式の撮像機（カメラ）を用いたが、幅広の光電センサーやレーザーセンサーを用いることもできる。また、検出手段は、二次元的であってもよいし、一次元（ラインセンサー）であってもよい。   In the control device 1 and the control method of the above-described embodiment, an optical imaging device (camera) is used as the detection unit, but a wide photoelectric sensor or laser sensor can also be used. Further, the detection means may be two-dimensional or one-dimensional (line sensor).

また、個々の境界部の撮像は、一機で行っても良いが、検出する境界部毎に行っても良い。   In addition, although imaging of each boundary part may be performed with one machine, it may be performed for each boundary part to be detected.

また、前記実施形態の制御装置１では、シーケンサー４１とコントローラー４２とを用いたが、これらの機能を備えた一つのコントローラーに置き換えることもできる。   Moreover, in the control apparatus 1 of the said embodiment, although the sequencer 41 and the controller 42 were used, it can replace with one controller provided with these functions.

また、本発明は、前記実施形態のように、三枚のシートがラップ部を介して接合された複合シートの搬送軌道の制御に限られず、二枚のシート或いは４枚以上のシートがラップ部を介して接合された複合シートの搬送軌道の制御方法にも適用することができる。   Further, the present invention is not limited to the control of the conveyance trajectory of the composite sheet in which three sheets are joined via the lap portion as in the above embodiment, and two sheets or four or more sheets are lap portions. The present invention can also be applied to a method for controlling the conveyance trajectory of a composite sheet bonded via a cable.

本発明は、前記実施形態におけるような、吸収性物品に用いられる複合シートの搬送軌道の制御の以外の複合シートの搬送軌道の制御にも適用することができる。   The present invention can also be applied to the control of the transport path of the composite sheet other than the control of the transport path of the composite sheet used in the absorbent article as in the above embodiment.

本発明の複合シートの搬送軌道の制御装置の一実施形態を模式的に示す斜視図である。It is a perspective view showing typically one embodiment of a control device of a conveyance course of a composite sheet of the present invention. 検知手段による境界部の検知方法を説明するための模式図であり、（ａ）は複合シートにおける撮像部分の平面図、（ｂ）は、撮像部分の画素データの一例である。It is a schematic diagram for demonstrating the detection method of the boundary part by a detection means, (a) is a top view of the imaging part in a composite sheet, (b) is an example of the pixel data of an imaging part. 検知手段による境界部の検知方法を説明するための模式図であり、（ａ）及び（ｂ）は検査領域内の画素データの一例を示す図、（ｃ）及び（ｄ）は検査領域内の画素データを微分した結果を示す図である。It is a schematic diagram for demonstrating the detection method of the boundary part by a detection means, (a) And (b) is a figure which shows an example of the pixel data in a test | inspection area, (c) And (d) is in a test | inspection area | region. It is a figure which shows the result of differentiating pixel data.

符号の説明Explanation of symbols

１ 複合シートの搬送軌道の制御装置
２ 検出手段
２１ ＣＣＤカメラ（撮像機）
２２ 照明器
２３ 画像処理装置
３ 軌道変更手段
３１ 軌道制御ロール
３１１ フレーム
３１２ フリーロール
３２ 制御モーター
４ 制御手段
4１ シーケンサー
４２ コントローラー
５ 表示・設定手段
１０ 複合シート
１００ 境界部
１０１ 表面シート（一のシート）
１０２ 側部シート（他のシート）
１０Ａ ラップ部
１０Ｂ 非ラップ部
１１ コンベアー
１２ 吸収体
１３ 撮像領域
１３０ 左側検査領域
１３１ 右側検査領域

DESCRIPTION OF SYMBOLS 1 Control apparatus of conveyance path of composite sheet 2 Detection means 21 CCD camera (imaging machine)
DESCRIPTION OF SYMBOLS 22 Illuminator 23 Image processing apparatus 3 Orbit change means 31 Orbit control roll 311 Frame 312 Free roll 32 Control motor 4 Control means
41 Sequencer 42 Controller 5 Display / setting means 10 Composite sheet 100 Boundary part 101 Surface sheet (one sheet)
102 Side sheet (other sheets)
10A Lapping part 10B Non-wrapping part 11 Conveyor 12 Absorber 13 Imaging area 130 Left inspection area 131 Right inspection area

Claims (5)

複数の帯状のシートがラップ部を介して接合された複合シートを長手方向に沿って搬送するときの軌道を制御する方法であって、
搬送されてくる前記複合シートにおけるラップ部と非ラップ部との境界部を検出し、検出された該境界部の基準位置からのずれに基づいて前記複合シートの搬送軌道を該境界部の検出位置の上流において制御する複合シートの搬送軌道の制御方法。 A method for controlling a trajectory when a plurality of strip-shaped sheets are conveyed along a longitudinal direction of a composite sheet joined through a lap portion,
A boundary portion between the wrap portion and the non-wrap portion in the composite sheet being conveyed is detected, and the detection position of the boundary portion is determined based on the detected deviation of the boundary portion from the reference position. Control method of composite sheet conveyance trajectory to be controlled upstream of the sheet. 前記ラップ部及び前記非ラップ部を撮像して得られた位置情報に基づいて前記境界部を検出する請求項１記載の複合シートの搬送軌道の制御方法。   The method for controlling a conveyance path of a composite sheet according to claim 1, wherein the boundary portion is detected based on position information obtained by imaging the wrap portion and the non-wrap portion. 前記複合シートは、一のシートの両側部にラップ部を介して他のシートがそれぞれ接合されてなり、検出される前記境界部として、前記他のシートの縁部を検出する請求項１又は２記載の複合シートの搬送軌道の制御方法。   The composite sheet is formed by joining other sheets to both sides of one sheet via a wrap portion, and detects an edge of the other sheet as the detected boundary. A method for controlling a conveyance path of the composite sheet as described. 請求項１記載の複合シートの搬送軌道の制御方法を実施するための装置であって、
長手方向に搬送されてくる前記複合シートの前記境界部を検出する検出手段と、前記複合シートの搬送軌道における前記検出手段の上流に配され該搬送軌道を変更する軌道変更手段と、前記検出手段で検出された前記境界部の基準位置からのずれを求めるとともに該ずれに基づいて前記軌道変更手段を作動させて前記複合シートの搬送軌道を制御する制御手段とを備えている複合シートの搬送軌道の制御装置。 An apparatus for carrying out the method for controlling a conveyance path of a composite sheet according to claim 1,
Detecting means for detecting the boundary portion of the composite sheet conveyed in the longitudinal direction; trajectory changing means for changing the conveying path disposed upstream of the detecting means in the conveying path of the composite sheet; and the detecting means And a control means for determining the deviation of the boundary portion from the reference position detected in step (b) and operating the trajectory changing means based on the deviation to control the conveyance trajectory of the composite sheet. Control device. 前記検出手段は、前記ラップ部及び前記非ラップ部の表面を撮像する撮像機と、前記複合シートの前記撮像機による撮像部分の裏側を照らす照明器とを備えている請求項４記載の複合シートの搬送軌道の制御装置。

5. The composite sheet according to claim 4, wherein the detection unit includes an imaging device that images the surfaces of the wrap portion and the non-wrap portion, and an illuminator that illuminates the back side of the imaging portion of the composite sheet by the imaging device. Control device for the transport trajectory.

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