JP5784452B2

JP5784452B2 - Sheet body edge detection sensor

Info

Publication number: JP5784452B2
Application number: JP2011229735A
Authority: JP
Inventors: 隆博大西; 良夫福井
Original assignee: Gunze Ltd
Current assignee: Gunze Ltd
Priority date: 2011-10-19
Filing date: 2011-10-19
Publication date: 2015-09-24
Anticipated expiration: 2031-10-19
Also published as: JP2013088307A

Description

本発明は、シート体の縁部検出センサに関する。 The present invention relates to an edge detection sensor of a sheet body.

半袖のアンダーシャツやＴシャツ等を製作する自動縫製ラインでは、例えば、生地を２つに折りたたみ、生地の縁部を合わせて、ミシンにて縁縫い等を行うときがある。生地を折りたたんで、折りたたんだ縁部同士をズレなく正確に合わせるためには、生地を折りたたむ前に縁部の位置を正確に検出する必要がある。このように、生地を折りたたむ際など、生地の縁部の位置を正確に検出することは重要なことである。生地の縁部を検出する技術ではないが、検出対象物を検出する技術として、特許文献１に示すものがある。 In an automatic sewing line for producing short-sleeved undershirts, T-shirts, and the like, for example, the fabric is folded in two, the edges of the fabric are aligned, and edge sewing or the like is performed with a sewing machine. In order to fold the fabric and accurately align the folded edges without any deviation, it is necessary to accurately detect the position of the edge before folding the fabric. Thus, it is important to accurately detect the position of the edge of the fabric, such as when the fabric is folded. Although it is not the technique which detects the edge part of cloth | dough, there exists a thing shown in patent document 1 as a technique which detects a detection target object.

特許文献１のファイバーセンサは、複数のファイバーセンサの投光側に同一光源を用いて、検出対象物を検出している。 The fiber sensor of patent document 1 is detecting the detection target object using the same light source on the light projection side of a plurality of fiber sensors.

特開平０３−１１５８８９号公報Japanese Patent Laid-Open No. 03-115889

特許文献１では、複数のファイバーセンサを用いて検出対象物を検出するものであるが、検出物がどのようなものであるか特定されておらず、生地などのシート体を検出することについて詳細に述べられていない。そのため、このような技術を用いたとしても、生地などのシート体の縁部を正確に検出することが難しいのが実情であり、新たに、シート体の縁部を検出するための技術の確立が必要であった。 In Patent Document 1, a detection object is detected using a plurality of fiber sensors, but what the detection object is is not specified, and details of detecting a sheet body such as a cloth are detailed. Not mentioned. Therefore, even if such a technique is used, it is actually difficult to accurately detect the edge of the sheet body such as the fabric, and a new technique for detecting the edge of the sheet body is established. Was necessary.

そこで、本発明は、上記問題点に鑑み、生地などのシート体の縁部を正確に検出することができるシート体の縁部検出センサを提供することを目的とする。 SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a sheet body edge detection sensor capable of accurately detecting the edge of a sheet body such as a cloth.

前記目的を達成するために、本発明は、次の手段を講じた。即ち、本発明に係るシート体の縁部検出センサは、シート体の一方面と面当接する当接部材と、前記当接部材に当接しているシート体へ向けて検出光を投光する投光部と、前記投光部が投光した検出光を受光可能なように設けられた受光部と、前記受光部の受光量を基に前記シート体の有無を検出する検出部と、を備え、前記投光部は前記当接部材に当接しているシート体と当該シート体の縁部から外れた外領域とにわたって検出光を投光できるように並設された複数の投光口を有し、前記受光部は前記投光部の投光口に個別に対応する受光口を有し、前記検出部は前記受光部の受光口に個別に対応する判断部を有しており、前記当接部材から離れた対向位置に当該当接部材と相対的に近接離反可能となる支持部材が備えられており、これら当接部材と支持部材とによって前記シート体を扁平に把持した状態で前記投光部と受光部とによる検出光の投受光が可能となっていることを特徴とする。
前記投光部及び受光部は、直径φが２ｍｍ以下の光ファイバで形成される導光部材を有したものとするのが好適である。 In order to achieve the above object, the present invention has taken the following measures. That is, the edge detection sensor for a sheet body according to the present invention projects a detection light toward a contact member that is in surface contact with one surface of the sheet body and a sheet body that is in contact with the contact member. A light unit, a light receiving unit provided so as to be able to receive the detection light projected by the light projecting unit, and a detection unit that detects the presence or absence of the sheet body based on the amount of light received by the light receiving unit. The light projecting unit has a plurality of light projecting ports arranged in parallel so that detection light can be projected over a sheet body that is in contact with the contact member and an outer region that is off the edge of the sheet body. and, the light receiving portion has a light-receiving port corresponding individually to the light projecting opening of the light projecting unit, the detecting unit has a determination unit which individually corresponding to the light receiving port of the light receiving portion, said those Support members that can be moved closer to and away from the contact member are provided at opposing positions away from the contact member. By the contact member and the support member, characterized in that the projection and reception of the detection light has become possible due to said light projecting unit and the light receiving portion while flattened gripping the sheet.
It is preferable that the light projecting unit and the light receiving unit have a light guide member formed of an optical fiber having a diameter φ of 2 mm or less.

前記投光口及び受光口は、２ｍｍ以下の配置ピッチで並設されていることが好適である。
前記投光部及び受光部は互いに隣接して設けられていると共に、前記当接部材から離れた対向位置で当該当接部材へ向けて配置されており、前記当接部材には、前記投光部が投光した検出光を透過させる窓部と、前記窓部を閉鎖して前記検出光を前記受光部へ向けて反射させるシャッター部材とが設けられたものとすることができる。 It is preferable that the light projecting port and the light receiving port are arranged in parallel at an arrangement pitch of 2 mm or less.
The light projecting unit and the light receiving unit are provided adjacent to each other, and are disposed toward the contact member at an opposed position away from the contact member. The window part which permeate | transmits the detection light which the part light-emitted, and the shutter member which closes the said window part and reflects the said detection light toward the said light-receiving part can be provided.

前記支持部材には、前記シート体と当接する面に前記投光部及び受光部が設けられていると共に、当該支持部材に対して前記当接部材を近接離反動作させるニップ機構が設けられているものとするのがよい。 The support member is provided with the light projecting portion and the light receiving portion on a surface that comes into contact with the sheet body, and a nip mechanism that moves the contact member toward and away from the support member. It should be.

本発明によれば、生地などのシート体の縁部を正確に検出することができる。 According to the present invention, it is possible to accurately detect an edge portion of a sheet body such as a cloth.

縁部検出センサを備えた把持装置を示した側面図であって（ａ）はシート体を把持する前の状態であり（ｂ）はシート体の把持状態である。It is the side view which showed the holding | grip apparatus provided with the edge part detection sensor, (a) is the state before holding a sheet | seat body, (b) is the holding | grip state of a sheet | seat body. 縁部検出センサを備えた把持装置を斜め下方から見上げる状態で示した斜視図である。It is the perspective view shown in the state which looked up at the holding | grip apparatus provided with the edge part detection sensor from diagonally downward. 縁部検出センサを示した斜視図である。It is the perspective view which showed the edge part detection sensor. 支持部材の押圧面を示した正面図である。It is the front view which showed the press surface of the supporting member. （ａ）は当接部材の窓部を開放させたときに当接部材と支持部材とでシート体を把持した状態を示す側断面図であり（ｂ）は当接部材の窓部を閉鎖させたときに当接部材と支持部材とでシート体を把持した状態を示す側断面図である。(A) is a sectional side view showing a state in which the sheet member is gripped by the contact member and the support member when the window portion of the contact member is opened. (B) is a view in which the window portion of the contact member is closed. FIG. 6 is a side sectional view showing a state in which the sheet body is gripped by the contact member and the support member when the contact is made. 高反射性のシート体を検出する場合の説明図（図５（ａ）のＡ矢視に相当）である。It is explanatory drawing (equivalent to A arrow of Fig.5 (a)) in the case of detecting a highly reflective sheet | seat body. 非反射性乃至低反射性のシート体を検出する場合の説明図（図５（ｂ）のＢ矢視に相当）である。It is explanatory drawing (equivalent to B arrow of FIG.5 (b)) in the case of detecting a non-reflective thru | or low reflective sheet | seat body. （ａ）は高反射性のシート体を検出するうえで受光量に閾値を設定する場合の関係図であり（ｂ）は非反射性乃至低反射性のシート体を検出するうえで受光量に閾値を設定する場合の関係図である。(A) is a relationship diagram in the case of setting a threshold value for the amount of received light when detecting a highly reflective sheet, and (b) is the amount of received light when detecting a non-reflective or low-reflective sheet. It is a related figure in the case of setting a threshold value.

以下、本発明の実施の形態を、図面に基づき説明する。
図１乃至図８は、本発明に係る縁部検出センサ１の第１実施形態を示している。このうち図２はこの縁部検出センサ１を用いて構成した把持装置５を示した斜視図であり、図１は、この把持装置５によってシート体Ｗを把持する状況を説明した側面図である。また図３は、縁部検出センサ１が具備する投光部２及び受光部３の取付状況を示した斜視図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 8 show a first embodiment of an edge detection sensor 1 according to the present invention. Among these, FIG. 2 is a perspective view showing a gripping device 5 configured using the edge detection sensor 1, and FIG. 1 is a side view illustrating a state in which the sheet body W is gripped by the gripping device 5. . FIG. 3 is a perspective view showing a mounting state of the light projecting unit 2 and the light receiving unit 3 included in the edge detection sensor 1.

図２及び図３に示すように、把持装置５は、シート体Ｗの四隅などを把持して持ち上げ、移載や積層などをするのに適した装置として構成されている。そして、この把持装置５がシート体Ｗを把持する部分で、シート体Ｗの縁部Ｗａを高精度に検出することができるように、縁部検出センサ１が用いられている。
なお、シート体Ｗは生地などとする。生地の材質は何ら限定されるものではなく、天然素材でも化繊素材でもよいし、場合によっては不織布やフェルトなどでもよい。また、生地の形態は編地としても織地としてもよい。その他、シート体Ｗは樹脂シート、紙などとしてもよい。当然に、シート体Ｗの形状は何ら限定されるものではない。本実施形態では、衣類などを仕立てるうえで必要とされる長方形状をしたパーツ生地を、シート体Ｗとして例示する。 As shown in FIGS. 2 and 3, the gripping device 5 is configured as a device suitable for gripping and lifting the four corners of the sheet body W, transferring, stacking, and the like. And the edge detection sensor 1 is used so that the edge part Wa of the sheet | seat body W can be detected with high precision in the part which this holding | grip apparatus 5 hold | grips the sheet | seat body W. FIG.
The sheet body W is a cloth or the like. The material of the fabric is not limited at all, and may be a natural material or a synthetic fiber material, and may be a non-woven fabric or felt depending on circumstances. The form of the fabric may be knitted fabric or woven fabric. In addition, the sheet body W may be a resin sheet, paper, or the like. Naturally, the shape of the sheet body W is not limited at all. In the present embodiment, a rectangular part fabric required for tailoring clothing and the like is exemplified as the sheet body W.

まず、把持装置５の全体構成を説明する。
この把持装置５は、長方形状の板状に形成された上部基枠１１の下部に、四隅に分かれて移動機構１０が設けられており、これら各移動機構１０にニップ機構１４が吊り下げ状に設けられ、これら各ニップ機構１４に縁部検出センサ１が組み込まれるようになっている。 First, the overall configuration of the gripping device 5 will be described.
The gripping device 5 is provided with a moving mechanism 10 divided into four corners at a lower portion of an upper base frame 11 formed in a rectangular plate shape, and a nip mechanism 14 is suspended from each moving mechanism 10. The edge detection sensor 1 is incorporated in each of the nip mechanisms 14.

以下では、説明の便宜上、シート体Ｗの長辺方向（図１の左右方向）を左右方向とおき、シート体Ｗの短辺方向を前後方向とおくものとする。なお、図２に、前後・左右方向を付記しておく。そして、シート体Ｗの左右両側の縁部Ｗａを、把持及び検出の対象とする場合について説明する。
移動機構１０は、軸方向を左右方向へ向けて上部基枠１１の下面に架設したガイドバー１２に沿って、ニップ機構１４（後述するニップ駆動部２２）を左右方向に移動可能に保持させたものである。 Hereinafter, for convenience of explanation, the long side direction of the sheet body W (left and right direction in FIG. 1) is set as the left and right direction, and the short side direction of the sheet body W is set as the front and back direction. In FIG. 2, the front and rear and left and right directions are added. And the case where the edge part Wa of the left-right both sides of the sheet | seat body W is made into the object of a holding | grip and a detection is demonstrated.
The moving mechanism 10 holds the nip mechanism 14 (a nip driving unit 22 described later) movably in the left-right direction along the guide bar 12 installed on the lower surface of the upper base frame 11 with the axial direction directed in the left-right direction. Is.

そのため、左右に離れて設けられた移動機構１０を同時に作動させることにより、これら両移動機構１０で保持するニップ機構１４同士を相互に近接離反させることができる。なお、シート体Ｗの左右方向長さが小さい場合などであれば、左右一方の移動機構１０のみを作動させて、片側のニップ機構１４を左右移動させるようにしてもよい。
この移動機構１０には、例えば、エアシリンダやソレノイドなどを駆動源とする高速駆動機構を用いたり、ステッピングモータやサーボモータ等の高精度制御が可能なモータ、或いはその他の一般モータを駆動源とする電動機構を用いたりすることができる。 Therefore, by simultaneously operating the moving mechanisms 10 that are separated from each other on the left and right, the nip mechanisms 14 held by these two moving mechanisms 10 can be brought close to and away from each other. If the sheet body W has a small length in the left-right direction, only one of the left and right moving mechanisms 10 may be operated to move the nip mechanism 14 on one side to the left and right.
As the moving mechanism 10, for example, a high-speed driving mechanism using an air cylinder or a solenoid as a driving source, a motor capable of high precision control such as a stepping motor or a servo motor, or another general motor is used as a driving source. An electric mechanism can be used.

ニップ機構１４は、左右方向に離れて対向配置された当接部材２０及び支持部材２１と、これら当接部材２０及び支持部材２１を相対的に近接離反させるニップ駆動部２２とを有している。
当接部材２０は、ニップ駆動部２２によって駆動される方の部材であって、シート体Ｗをその左右方向外方（左方の縁部Ｗａについてはその左方側を言い、右方の縁部Ｗａについてはその右方側を言う）から掬い上げるようにする。 The nip mechanism 14 includes an abutting member 20 and a supporting member 21 that are arranged to face each other in the left-right direction, and a nip driving unit 22 that relatively moves the abutting member 20 and the supporting member 21 closer to and away from each other. .
The abutting member 20 is a member driven by the nip driving unit 22 and the sheet body W is outward in the left-right direction (for the left edge Wa, the left side is referred to as the right edge). The portion Wa is said to the right side).

この当接部材２０は、板素材を上下中間部で屈曲するなどして形成したものであって、屈曲部２４よりも下側に、掬い角に合わせてシート体Ｗの一方面（以下、裏面という）と面当接するようになる押圧面２０ａが形成されている。また、この当接部材２０は、屈曲部２４よりも上側に、ニップ駆動部２２との連結部２３が形成されている。
この当接部材２０には、図３に示すように、押圧面２０ａの中央部を表裏へ開通させた窓部３０が設けられており、また当接部材２０の外向き面（押圧面２０ａとは反対側の面）に、窓部３０を開放状態と閉鎖状態とに切り換えることができるシャッター部材３１が設けられている。 The abutting member 20 is formed by bending a plate material at the upper and lower intermediate portions, and is formed on one side (hereinafter referred to as the back surface) of the sheet body W below the bent portion 24 so as to match the scooping angle. A pressing surface 20a is formed so as to come into surface contact. Further, the contact member 20 is formed with a connecting portion 23 with the nip driving portion 22 above the bent portion 24.
As shown in FIG. 3, the contact member 20 is provided with a window portion 30 in which the central portion of the pressing surface 20 a is opened to the front and back, and the outward surface (the pressing surface 20 a and the pressing surface 20 a) of the contact member 20. Is provided with a shutter member 31 that can switch the window 30 between an open state and a closed state.

シャッター部材３１は、例えば、ステンレス板などの反射率の高い素材で形成されている。
本実施形態では、当接部材２０に対し、揺動ピン３２を支点としてシャッター部材３１を揺動自在に設けることにより、このシャッター部材３１の揺動で窓部３０を開放又は閉鎖する構造を採用している。しかし、窓部３０の両側に配置するガイドレールに沿ってシャッター部材３１を摺動自在に設けることにより、このシャッター部材３１の摺動で窓部３０を開放又は閉鎖する構造を採用してもよい。 The shutter member 31 is formed of a material having a high reflectance such as a stainless plate, for example.
In the present embodiment, a structure in which the shutter member 31 is swingably provided with the swing pin 32 as a fulcrum with respect to the abutting member 20 so that the window 30 is opened or closed by the swing of the shutter member 31 is employed. doing. However, a structure may be adopted in which the shutter member 31 is slidably provided along the guide rails arranged on both sides of the window portion 30 so that the window portion 30 is opened or closed by sliding of the shutter member 31. .

この当接部材２０と対向して設けられた支持部材２１は、ニップ駆動部２２に対して固定される方の部材であって、当接部材２０が掬い上げたシート体Ｗの縁部Ｗａを当て止めする。
この支持部材２１は、当接部材２０の押圧面２０ａに略対応する大きさを有する板片状に形成されており、当接部材２０へ向く側に押圧面２１ａが形成されている。この押圧面２１ａは、当接部材２０の押圧面２０ａと略同じ高さで、且つ面平行となるように傾斜して配置されている。 The support member 21 provided so as to face the contact member 20 is a member fixed to the nip drive unit 22, and the edge Wa of the sheet body W raised by the contact member 20 is used as the support member 21. Stop it.
The support member 21 is formed in a plate shape having a size substantially corresponding to the pressing surface 20 a of the contact member 20, and the pressing surface 21 a is formed on the side facing the contact member 20. The pressing surface 21a is disposed so as to be substantially the same height as the pressing surface 20a of the contact member 20 and to be parallel to the surface.

ニップ駆動部２２は、支持部材２１に対して当接部材２０を最も近接させたときに、支持部材２１の押圧面２１ａと当接部材２０の押圧面２０ａとをそれぞれシート体Ｗと面当接させ、これによってシート体Ｗを扁平に均して把持できるようにしている。またニップ駆動部２２は、支持部材２１から当接部材２０を離した状態で停止させることができるようになっている。 When the contact member 20 is brought closest to the support member 21, the nip drive unit 22 brings the pressing surface 21 a of the support member 21 and the pressing surface 20 a of the contact member 20 into surface contact with the sheet body W, respectively. Thus, the sheet body W can be gripped flatly. The nip drive unit 22 can be stopped in a state where the contact member 20 is separated from the support member 21.

このニップ駆動部２２には、例えば、エアシリンダやソレノイドなどを駆動源とする高速駆動機構を用いたり、ステッピングモータやサーボモータ等の高精度制御が可能なモータ、或いはその他の一般モータを駆動源とする電動機構を用いたりすることができる。
次に、縁部検出センサ１について説明する。
この縁部検出センサ１は、図３に示すように、検出光を投光（照射）する投光部２と、この投光部２が投光した検出光を受光する受光部３と、この受光部３の受光量を基にシート体Ｗの有無を検出する検出部３５（図１及び図２参照）とを有している。 The nip drive unit 22 uses, for example, a high-speed drive mechanism using an air cylinder or solenoid as a drive source, a motor capable of high-precision control such as a stepping motor or a servo motor, or other general motor as a drive source. Or an electric mechanism can be used.
Next, the edge detection sensor 1 will be described.
As shown in FIG. 3, the edge detection sensor 1 includes a light projecting unit 2 that projects (irradiates) detection light, a light receiving unit 3 that receives the detection light projected by the light projecting unit 2, and A detection unit 35 (see FIGS. 1 and 2) that detects the presence or absence of the sheet W based on the amount of light received by the light receiving unit 3 is provided.

投光部２及び受光部３は、いずれも、ニップ機構１４の支持部材２１に対して、その押圧面２１ａから当接部材２０の押圧面２０ａへ向かう状態で設けられている。これにより、この縁部検出センサ１では、当接部材２０と支持部材２１とでシート体Ｗを把持したときに、このシート体Ｗへ向けて投光部２と受光部３との間で検出光の投受光ができるようになっている。 Both the light projecting unit 2 and the light receiving unit 3 are provided on the support member 21 of the nip mechanism 14 in a state from the pressing surface 21 a toward the pressing surface 20 a of the contact member 20. Thus, in the edge detection sensor 1, when the sheet body W is gripped by the contact member 20 and the support member 21, detection is performed between the light projecting unit 2 and the light receiving unit 3 toward the sheet body W. Light can be sent and received.

投光部２は、複数の投光口２ａと、各投光口２ａごとに設けられた複数の導光部材とを有して成る。導光部材は光ファイバ２６Ａによって形成してあり、この光ファイバ２６Ａの先端部を研磨などによってファイバ軸に垂直な鏡面状にすることで、この鏡面部分で投光口２ａを形成させてある。従って、導光部材によってその根本側から投光口２ａへ向けて検出光を導き、この投光口２ａから検出光を投光することができる。 The light projecting unit 2 includes a plurality of light projecting ports 2a and a plurality of light guide members provided for each light projecting port 2a. The light guide member is formed by an optical fiber 26A, and the tip of the optical fiber 26A is made into a mirror surface perpendicular to the fiber axis by polishing or the like, so that the light projection port 2a is formed at this mirror surface portion. Therefore, it is possible to guide the detection light from the base side toward the light projection port 2a by the light guide member and project the detection light from the light projection port 2a.

各投光口２ａは、図４に示すように、前後方向で一列に並設されている。また、互いに隣り合う投光口２ａ同士が可及的に近接するように、相互間隔を詰めて配置されている。
投光口２ａを前後方向で一列に並設する場合は、光ファイバ２６Ａは、直径が２ｍｍ以下のものを用いるのが好ましい。このようにすることで、光ファイバ２６Ａの先端部（支持部材２１へ貫通させる部分）を隙間無く詰めることができ、投光口２ａの配置ピッチ［隣接する投光口２ａ（光ファイバ２６Ａ）において配列方向（前後方向）の中心間距離］を２ｍｍ以下とすることができる。言うまでもなく、光ファイバ２６Ａとして、直径の細いものを使うほど、シート体Ｗの検出精度を高めることが可能となる。投光口２ａを前後方向で一列に並設する場合は、光ファイバ２６Ａの直径が２ｍｍを超えると、検出精度は著しく低下して、実用には不向きとなる。 As shown in FIG. 4, the light projecting openings 2a are arranged in a line in the front-rear direction. Further, the light projecting openings 2a adjacent to each other are arranged close to each other so as to be as close as possible.
When the projection ports 2a are arranged in a line in the front-rear direction, it is preferable to use the optical fiber 26A having a diameter of 2 mm or less. By doing in this way, the front-end | tip part (part penetrated to the supporting member 21) of optical fiber 26A can be packed without gap, and in arrangement pitch of the light projection port 2a [in the adjacent light projection port 2a (optical fiber 26A). The distance between the centers in the arrangement direction (front-rear direction) can be 2 mm or less. Needless to say, the detection accuracy of the sheet member W can be increased as the optical fiber 26A having a smaller diameter is used. In the case where the projection ports 2a are arranged in a line in the front-rear direction, if the diameter of the optical fiber 26A exceeds 2 mm, the detection accuracy is remarkably deteriorated and becomes unsuitable for practical use.

本実施形態では、直径１ｍｍの光ファイバ２６Ａを６本用いて、配置ピッチを１．１ｍｍとした。従って、支持部材２１に対して光ファイバ２６Ａの先端部を貫通させるための貫通孔は、隣合う孔同士を長孔状ではなく、ダルマ孔状（孔と孔の間に鋭角な括れ突起を対向させて残した連通孔）とすることができる。その結果、各光ファイバ２６Ａの位置決めを高精度で行える効果と、各光ファイバ２６Ａの位置ズレを防止できる効果が得られている。 In this embodiment, six optical fibers 26A having a diameter of 1 mm are used, and the arrangement pitch is 1.1 mm. Therefore, the through hole for allowing the end of the optical fiber 26A to penetrate the support member 21 is not a long hole between adjacent holes, but a dharma hole (a sharp constriction protrusion is opposed between the holes). Left communication hole). As a result, the effect of positioning each optical fiber 26A with high accuracy and the effect of preventing the positional deviation of each optical fiber 26A are obtained.

受光部３についても前記した投光部２と略同じ構成であるが、以下再記する。
すなわち、この受光部３は、複数の受光口３ａと、各受光口３ａごとに設けられた複数の導光部材とを有して成る。導光部材は光ファイバ２６Ｂによって形成してあり、この光ファイバ２６Ｂの先端部を研磨などによってファイバ軸に垂直な鏡面状にすることで、この鏡面部分で受光口３ａを形成させてある。従って、受光口３ａで受光した検出光を導光部材によってその根本側へ導くことができる。 The light receiving unit 3 has substantially the same configuration as the light projecting unit 2 described above, but will be described again below.
That is, the light receiving unit 3 includes a plurality of light receiving ports 3a and a plurality of light guide members provided for the respective light receiving ports 3a. The light guide member is formed by an optical fiber 26B, and the light receiving port 3a is formed at the mirror surface portion by polishing the tip of the optical fiber 26B into a mirror surface perpendicular to the fiber axis by polishing or the like. Therefore, the detection light received by the light receiving port 3a can be guided to the root side by the light guide member.

各受光口３ａは、前後方向で一列に並設されている。また、互いに隣り合う受光口３ａ同士が可及的に近接するように、相互間隔を詰めて配置されている。
受光口３ａを前後方向で一列に並設する場合は、光ファイバ２６Ｂは、直径が２ｍｍ以下のを用いるのが好ましい。このようにすることで、光ファイバ２６Ｂの先端部（支持部材２１へ貫通させる部分）を隙間無く詰めることができ、受光口３ａの配置ピッチ[隣接する受光口３ａ（光ファイバ２６Ｂ）において配列方向（前後方向）の中心間距離]を２ｍｍ以下とすることができる。言うまでもなく、光ファイバ２６Ｂとして、直径の細いものを使うほど、シート体Ｗの検出精度を高めることが可能となる。受光口３ａを前後方向で一列に並設する場合は、光ファイバ２６Ｂの直径が２ｍｍを超えると、検出精度は著しく低下して、実用には不向きとなる。 The light receiving openings 3a are arranged in a line in the front-rear direction. Further, the light receiving openings 3a adjacent to each other are arranged close to each other so as to be as close as possible.
When the light receiving ports 3a are arranged in a line in the front-rear direction, it is preferable to use the optical fiber 26B having a diameter of 2 mm or less. By doing in this way, the front-end | tip part (part penetrated to the support member 21) of the optical fiber 26B can be packed without gap, and the arrangement pitch of the light receiving ports 3a [the arrangement direction in the adjacent light receiving ports 3a (optical fiber 26B)] (Distance between centers in the front-rear direction) can be 2 mm or less. Needless to say, the detection accuracy of the sheet member W can be increased as the optical fiber 26B has a smaller diameter. In the case where the light receiving ports 3a are arranged in a line in the front-rear direction, if the diameter of the optical fiber 26B exceeds 2 mm, the detection accuracy is remarkably deteriorated and is not suitable for practical use.

本実施形態では、直径１ｍｍの光ファイバ２６Ｂを６本用いて、配置ピッチを１．１ｍｍとした。従って、支持部材２１に対して光ファイバ２６Ｂの先端部を貫通させるための貫通孔は、隣合う孔同士を長孔状ではなく、ダルマ孔状（孔と孔の間に鋭角な括れ突起を対向させて残した連通孔）とすることができる。その結果、各光ファイバ２６Ｂの位置決めを高精度で行える効果と、各光ファイバ２６Ｂの位置ズレを防止できる効果が得られている。 In this embodiment, six optical fibers 26B having a diameter of 1 mm are used, and the arrangement pitch is 1.1 mm. Therefore, the through hole for allowing the end of the optical fiber 26B to penetrate the support member 21 is not a long hole between adjacent holes, but a dharma hole (a sharp constriction protrusion is opposed between the holes). Left communication hole). As a result, the effect of positioning each optical fiber 26B with high accuracy and the effect of preventing the positional deviation of each optical fiber 26B are obtained.

なお、投光部２の各投光口２ａと受光部３の各受光口３ａとは、上下方向に２段に配置されている。図例では、受光口３ａが上段側で投光口２ａが下段側としているが、上下逆としてもよい。そして、投光口２ａから投光された検出光をその直上の受光口３ａが受光するように、上下で対を成す関係とされている。
一方、検出部３５は、受光部３が受光した受光量に基づいて、シート体Ｗの縁部の有無を検出するところである。そのために、この検出部３５は、複数（投光部２の投光口２ａ数や受光部３の受光口３ａ数と同数）の判断部（図示略）を有したものとされている。すなわち、投光部２が有する光ファイバ２６Ａ（導光部材）の根本部と、受光部３が有する光ファイバ２６Ｂ（導光部材）の根本部とが、互いに１対１対応とされて一つの判断部と接続される。 The light projecting ports 2a of the light projecting unit 2 and the light receiving ports 3a of the light receiving unit 3 are arranged in two stages in the vertical direction. In the example shown in the figure, the light receiving port 3a is on the upper side and the light projecting port 2a is on the lower side, but may be upside down. And it is set as the relationship which makes a pair up and down so that the light-receiving port 3a immediately above it may receive the detection light projected from the light projection port 2a.
On the other hand, the detection unit 35 detects the presence or absence of the edge of the sheet W based on the amount of light received by the light receiving unit 3. Therefore, the detection unit 35 has a plurality of determination units (not shown) (the same number as the number of light projection ports 2a of the light projecting unit 2 and the number of light reception ports 3a of the light receiving unit 3). That is, the base part of the optical fiber 26A (light guide member) included in the light projecting unit 2 and the base part of the optical fiber 26B (light guide member) included in the light receiving unit 3 are in a one-to-one correspondence with each other. Connected to the determination unit.

個々の判断部では、投光部２の各光ファイバ２６Ａから検出光を投光させたときに、受光部３の各光ファイバ２６Ｂで検出光を受光したか否か、或いは、受光した検出光の受光量が所定の閾値に対して強いか弱いか、につき、判別を行う。
なお、図１（ａ）に示すように、検出部３５において、投光部２の光ファイバ２６Ａが接続される部分にはＬＥＤ等の投光素子３５ａが設けられ、受光部３の光ファイバ２６Ｂが接続される部分には受光素子３５ｂが設けられている。各判断部では、投光素子３５ａと受光素子３５ｂとの間で投受光する検出光の周波数を、それぞれ異ならせてあり、各判断部が誤検出を起こさないように対処してある。 In each determination unit, when the detection light is projected from each optical fiber 26A of the light projecting unit 2, whether the detection light is received by each optical fiber 26B of the light receiving unit 3, or the received detection light It is determined whether the amount of received light is strong or weak with respect to a predetermined threshold.
As shown in FIG. 1A, in the detection unit 35, a light projecting element 35 a such as an LED is provided at a portion to which the optical fiber 26 </ b> A of the light projecting unit 2 is connected, and the optical fiber 26 </ b> B of the light receiving unit 3. A light receiving element 35b is provided at a portion to which is connected. In each determination unit, the frequencies of the detection light projected and received are different between the light projecting element 35a and the light receiving element 35b, and each determination unit takes measures to prevent erroneous detection.

次に、把持装置５及び縁部検出センサ１の動作について説明する。
まず図１（ａ）に示すように、シート体Ｗの左右方向長さに応じて左右の移動機構１０を作動させ、シート体Ｗにおける左右両側の縁部Ｗａを把持できる位置へ左右のニップ機構１４を移動させる。
次に、上部基枠１１を下降させる。そして左右のニップ機構１４を作動させ、図１（ｂ）に示すように、当接部材２０を支持部材２１へ近接移動させ、当接部材２０と支持部材２１とでシート体Ｗの縁部Ｗａを把持させる。このとき、シート体Ｗの縁部Ｗａは、当接部材２０の押圧面２０ａと支持部材２１の押圧面２１ａとにそれぞれ面当接された状態として両面から押圧されることで扁平化され、その結果、皺や反りなどが伸ばされた状態でしっかりと固定される。 Next, operations of the gripping device 5 and the edge detection sensor 1 will be described.
First, as shown in FIG. 1A, the left and right nip mechanisms are moved to positions where the left and right edge portions Wa of the sheet W can be gripped by operating the left and right moving mechanisms 10 according to the length of the sheet W in the left-right direction. 14 is moved.
Next, the upper base frame 11 is lowered. Then, the left and right nip mechanisms 14 are actuated to move the contact member 20 close to the support member 21 as shown in FIG. 1B, and the edge Wa of the sheet body W is formed by the contact member 20 and the support member 21. To hold. At this time, the edge Wa of the sheet body W is flattened by being pressed from both sides as being in surface contact with the pressing surface 20a of the contact member 20 and the pressing surface 21a of the support member 21, respectively. As a result, it is firmly fixed with the wrinkles and warp stretched.

このような把持状態となった段階で、縁部検出センサ１がシート体Ｗの検出を行う。縁部検出センサ１によるシート体Ｗの検出は、シート体Ｗが高反射性の素材（例えば、シート表面が白色である場合など）であるか、或いは、シート体Ｗが非反射性乃至低反射性の素材（例えば、シート表面が黒色である場合など）であるかによって、以下のような違いがある。 The edge detection sensor 1 detects the sheet body W when the gripping state is reached. The detection of the sheet W by the edge detection sensor 1 is performed when the sheet W is a highly reflective material (for example, when the sheet surface is white) or the sheet W is non-reflective or low reflective. There are differences as follows depending on whether the material is a natural material (for example, when the sheet surface is black).

すなわち、高反射性のシート体Ｗの場合は、図５（ａ）に示すように、当接部材２０に設けられたシャッター部材３１を予め開いておき、窓部３０を開放させておく。
このようにすることで、図６に示すように、投光部２の全６つの投光口２ａで投光された検出光のうち、シート体Ｗによって覆われた投光口２ａ（図６中の右側４つの投光口２ａ）から投光された検出光は、シート体Ｗで反射して、それぞれ直上の受光口３ａで受光される。 That is, in the case of the highly reflective sheet W, as shown in FIG. 5A, the shutter member 31 provided on the contact member 20 is opened in advance, and the window 30 is opened.
By doing in this way, as shown in FIG. 6, among the detection light projected by all the six light projection openings 2a of the light projection part 2, the light projection opening 2a (FIG. 6) covered with the sheet | seat body W. The detection light projected from the four right light projecting apertures 2a) is reflected by the sheet W and received by the light receiving aperture 3a directly above.

しかし、シート体Ｗの縁部Ｗａから外れた外領域に相当する投光口２ａ（図６中の左側２つの投光口２ａ）から投光された検出光は、窓部３０を通過してしまい、それらの直上の受光口３ａでは受光されない。このような受光部３（６つの受光口３ａ）による検出光の受光の有無を、反射表として図６中に付記した。
一方、非反射性乃至低反射性のシート体Ｗの場合は、図５（ｂ）に示すように、当接部材２０に設けられたシャッター部材３１を予め閉じておき、窓部３０を閉鎖させておく。 However, the detection light projected from the light projection port 2a (the two left light projection ports 2a in FIG. 6) corresponding to the outer region deviated from the edge portion Wa of the sheet body W passes through the window 30. Therefore, no light is received at the light receiving port 3a immediately above them. The presence / absence of reception of detection light by the light receiving unit 3 (six light receiving ports 3a) is shown in FIG. 6 as a reflection table.
On the other hand, in the case of the non-reflective or low-reflective sheet member W, as shown in FIG. 5B, the shutter member 31 provided on the contact member 20 is closed in advance, and the window portion 30 is closed. Keep it.

このようにすることで、図７に示すように、投光部２の全６つの投光口２ａで投光された検出光のうち、シート体Ｗの縁部Ｗａから外れた外領域に相当する投光口２ａ（図７中の左側２つの投光口２ａ）から投光された検出光は、窓部３０を閉鎖しているシャッター部材３１で反射して、それぞれ直上の受光口３ａで受光される。
しかし、シート体Ｗによって覆われた投光口２ａ（図７中の右側４つの投光口２ａ）から投光された検出光は、シート体Ｗで全く又は殆ど反射しないことから、それらの直上の受光口３ａでは受光されない。このような受光部３（６つの受光口３ａ）による検出光の受光の有無を、反射表として図７中に付記した。 By doing in this way, as shown in FIG. 7, it corresponds to the outer area | region which remove | deviated from the edge part Wa of the sheet | seat body W among the detection lights projected by all the six light projection openings 2a of the light projection part 2. FIG. The detection light projected from the projection port 2a (the two left projection ports 2a in FIG. 7) is reflected by the shutter member 31 that closes the window 30, and is received by the light receiving port 3a directly above. Received light.
However, since the detection light projected from the light projection ports 2a covered by the sheet body W (the four light projection ports 2a on the right side in FIG. 7) is not reflected or hardly reflected by the sheet body W, the light just above them. The light receiving port 3a does not receive light. The presence / absence of reception of detection light by the light receiving unit 3 (six light receiving ports 3a) is shown in FIG. 7 as a reflection table.

このような反射表（図６及び図７参照）の結果に基づき、検出部３５は、シート体Ｗを検出している受光口３ａと非検出の受光口３ａとの間に、シート体Ｗの縁部Ｗａが存在すると判断する。
把持装置５は、シート体Ｗを移載又は積層する位置へ向けて上部基枠１１を移動させた後、検出部３５による前記の検出結果に基づき、上部基枠１１を停止させる位置（ニップ機構１４がシート体Ｗを解放する位置）のデータを補正し、この補正後のデータに基づいて上部基枠１１を停止させる。しかる後、ニップ機構１４がシート体Ｗの把持を解除して、移載又は積層を完了させる。 Based on the result of such a reflection table (see FIGS. 6 and 7), the detection unit 35 is arranged between the light receiving port 3a detecting the sheet W and the non-detecting light receiving port 3a. It is determined that the edge Wa exists.
The gripping device 5 moves the upper base frame 11 toward the position where the sheet W is transferred or stacked, and then stops the upper base frame 11 based on the detection result by the detection unit 35 (nip mechanism). 14 is corrected), and the upper base frame 11 is stopped based on the corrected data. Thereafter, the nip mechanism 14 releases the gripping of the sheet body W and completes the transfer or lamination.

ところで、検出部３５は、受光部３による検出光の受光の有無ではなく、受光した検出光の強弱に基づいて、シート体Ｗの有無を判断するように構成してもよい。
この場合は、高反射性のシート体Ｗを検出するときも、また非反射性乃至低反射性のシート体Ｗを検出するときも、当接部材２０に設けられたシャッター部材３１は閉じた状態とし、窓部３０を閉鎖しておく。なお、この場合に用いるシャッター部材３１は高反射性シート体Ｗよりも反射率が高い素材により形成されているものとする。 By the way, the detection unit 35 may be configured to determine the presence or absence of the sheet body W based on the strength of the received detection light, not the presence or absence of reception of the detection light by the light receiving unit 3.
In this case, the shutter member 31 provided on the contact member 20 is closed both when the highly reflective sheet W is detected and when the non-reflective or low reflective sheet W is detected. And the window 30 is closed. Note that the shutter member 31 used in this case is formed of a material having a higher reflectance than the highly reflective sheet body W.

そして、検出部３５には、高反射性シート体Ｗの有無を判別するための第２閾値と、この第２閾値よりも低く、且つ検出光がシャッター部材３１に反射したときの受光量を判別するための第１閾値とを設定する。
図８（ａ）は、高反射性のシート体Ｗ（図８（ａ）では「白色シート体」と表記）を検出する状況を示しており、第２閾値に満たない受光量を検出したときに、検出部３５は高反射性のシート体Ｗが存在（検出）すると判断する。しかし、第２閾値と同等以上の受光量を検出したときに、検出部３５は高反射性のシート体Ｗが存在しない（非検出）と判断する。 The detection unit 35 determines the second threshold value for determining the presence or absence of the highly reflective sheet W and the amount of light received when the detection light is reflected by the shutter member 31 and is lower than the second threshold value. And a first threshold value for setting.
FIG. 8A shows a situation in which a highly reflective sheet W (indicated as “white sheet” in FIG. 8A) is detected, and when a received light amount that does not satisfy the second threshold is detected. In addition, the detection unit 35 determines that the highly reflective sheet W is present (detected). However, when detecting a received light amount equal to or greater than the second threshold, the detection unit 35 determines that the highly reflective sheet W is not present (non-detection).

これに対し、図８（ｂ）は、非反射性又は低反射性のシート体Ｗ（図８（ｂ）では「黒色シート体」と表記）を検出する状況を示しており、第１閾値に満たない受光量を検出したとき、或いは、全く受光しなかったときに、検出部３５は非反射性又は低反射性のシート体Ｗが存在（検出）すると判断する。当然に、第２閾値と同等以上の受光量を検出したときに、検出部３５は非反射性又は低反射性のシート体Ｗが存在しない（非検出）と判断する。 On the other hand, FIG. 8B shows a situation in which a non-reflective or low-reflective sheet body W (indicated as “black sheet body” in FIG. 8B) is detected, and the first threshold value is set as the first threshold value. When detecting an amount of received light that is less than that, or when no light is received, the detection unit 35 determines that a non-reflective or low-reflective sheet body W exists (detects). Naturally, when detecting a received light amount equal to or greater than the second threshold, the detection unit 35 determines that there is no non-reflective or low-reflective sheet body W (non-detection).

このように、第１閾値及び第２閾値を設けることによって、反射性の異なるシート体Ｗの検出状況を使い分けることができる。この検出方法を採用する場合、当接部材２０に窓部３０やシャッター部材３１を設ける必要はなく、当接部材２０の押圧面２０ａ自体が高反射性シート体Ｗよりも反射率の高い面として形成すればよい。
以上詳説したように、本発明に係る縁部検出センサ１によれば、投光部２において複数の投光口２ａを詰めて並設しているため、シート体Ｗの高精度位置検出が可能となっている。 As described above, by providing the first threshold value and the second threshold value, it is possible to selectively use the detection states of the sheet bodies W having different reflectivities. When this detection method is employed, it is not necessary to provide the window portion 30 and the shutter member 31 on the contact member 20, and the pressing surface 20 a itself of the contact member 20 has a higher reflectivity than the highly reflective sheet body W. What is necessary is just to form.
As described in detail above, according to the edge detection sensor 1 according to the present invention, since the plurality of light projection ports 2a are arranged side by side in the light projecting unit 2, it is possible to detect the position of the sheet body W with high accuracy. It has become.

なお、この縁部検出センサ１を、シート体Ｗを把持するためのニップ機構１４に組み込んだ構成とすると、当接部材２０と支持部材２１とでシート体Ｗの縁部Ｗａを皺の無い扁平な状態にしたうえで、縁部Ｗａの検出が行えるので、シート体Ｗの縁部Ｗａの位置検出は一層、高精度で行うことができる。
加えて、当接部材２０に対し、窓部３０及びシャッター部材３１を設けているので、反射性の異なるシート体Ｗであっても、検出が可能となっている。 If the edge detection sensor 1 is configured to be incorporated in the nip mechanism 14 for gripping the sheet W, the edge Wa of the sheet W is flattened with no wrinkles by the contact member 20 and the support member 21. In addition, since the edge Wa can be detected, the position of the edge Wa of the sheet W can be detected with higher accuracy.
In addition, since the window portion 30 and the shutter member 31 are provided for the contact member 20, even the sheet body W having different reflectivity can be detected.

本発明は、上記実施形態に限定されるものではない。
例えば、本発明に係る縁部検出センサ１は、投光部２の投光口２ａや受光部３の受光口３ａを、それぞれ複数設けて、互いに詰めた相互間隔で並設することに特徴を有したものであるが、必ずしも、投光口２ａ同士、及び受光口３ａ同士を、互いに隙間無く詰める配置とすることが限定されるものではない。 The present invention is not limited to the above embodiment.
For example, the edge detection sensor 1 according to the present invention is characterized in that a plurality of light emitting ports 2a of the light projecting unit 2 and a plurality of light receiving ports 3a of the light receiving unit 3 are provided and arranged in parallel with each other at a close interval. However, it is not necessarily limited to the arrangement in which the light projecting apertures 2a and the light receiving apertures 3a are packed with no gap therebetween.

すなわち、投光口２ａ同士、受光口３ａ同士を、千鳥状にずらして配置することで、投光口２ａの配置ピッチや受光口３ａの配置ピッチを、光ファイバ２６Ａや２６Ｂの直径より小さく設定させることも可能となる。例えば、光ファイバ２６Ａや２６Ｂの直径を２ｍｍ以下である１．３ｍｍにしている場合、投光口２ａや受光口３ａの配置ピッチを光ファイバ２６Ａや２６Ｂの直径よりも小さな０．９ｍｍにすることができる。なお、投光口２ａや受光口３ａを千鳥状に配置する場合、光ファイバ２６の直径を２ｍｍ以下とするのが好ましいが、光ファイバ２６Ａや２６Ｂの直径を２ｍｍを超えてもよい。 That is, by arranging the light projecting apertures 2a and the light receiving apertures 3a in a staggered manner, the pitch of the light projecting apertures 2a and the pitch of the light receiving apertures 3a are set smaller than the diameters of the optical fibers 26A and 26B. It is also possible to make it. For example, when the diameter of the optical fibers 26A and 26B is set to 1.3 mm which is 2 mm or less, the arrangement pitch of the light projecting ports 2a and the light receiving ports 3a is set to 0.9 mm which is smaller than the diameter of the optical fibers 26A and 26B. Can do. In addition, when arrange | positioning the light projection port 2a and the light-receiving port 3a in zigzag form, it is preferable that the diameter of the optical fiber 26 shall be 2 mm or less, but the diameter of the optical fibers 26A and 26B may exceed 2 mm.

また逆に、投光口２ａ同士、受光口３ａ同士を一列に並設させる場合にあって、微少な隙間を生じさせることで、投光口２ａの配置ピッチや受光口３ａの配置ピッチを、光ファイバ２６Ａや２６Ｂの直径より僅かに大きく設定させることも可能となる。
縁部検出センサ１は、シート体Ｗにおける前後方向の縁部Ｗａを検出するものとしてもよいし、前後左右の縁部Ｗａを検出するものとしてもよい。 Conversely, in the case where the light projecting ports 2a and the light receiving ports 3a are arranged in a line, by generating a slight gap, the arrangement pitch of the light projecting ports 2a and the arrangement pitch of the light receiving ports 3a are as follows. It is also possible to set the diameter slightly larger than the diameter of the optical fibers 26A and 26B.
The edge detection sensor 1 may detect the edge Wa in the front-rear direction of the sheet body W, or may detect the front-rear, left-right edge Wa.

投光部２の投光口２ａや受光部３の受光口３ａの設置数は何ら限定されるものではなく、６つを超えた数とすることも勿論可能である。また支持部材２１の押圧面２１ａに対する配置パターンとしても、前後方向の全領域にわたるように配置することが可能である。
把持装置５（図１及び図２参照）は、シート体Ｗを二つ折りして対向する縁部Ｗａ同士を一致させる装置として構成することができ、この場合、縁部検出センサ１は、一致させようとする縁部Ｗａ同士を検出するためのものとして適用することができる。 The number of light emitting ports 2a of the light projecting unit 2 and the number of light receiving ports 3a of the light receiving unit 3 is not limited at all, and it is needless to say that the number exceeding six is possible. Further, the arrangement pattern of the support member 21 with respect to the pressing surface 21a can be arranged so as to cover the entire region in the front-rear direction.
The gripping device 5 (see FIG. 1 and FIG. 2) can be configured as a device that folds the sheet body W and matches the opposing edge portions Wa. In this case, the edge detection sensor 1 is made to match. It can apply as a thing for detecting edge part Wa to be tried.

なお、本発明に係る縁部検出センサ１は、把持装置５に対して実施することが限定されるものではなく、テーブル上でシート体Ｗを位置決めするような場合にも、テーブル側、又はテーブル上方に設けた他部材に対して投光部２や受光部３を設けるようにして適用可能である。
上述した実施形態では、投光口２ａ及び受光口３ｂを同一平面上（同一向かい側）である押圧面２１ａに設けているが、投光口２ａ及び受光口３ｂのそれぞれを対向側である押圧面２０ａ、２１ａに設けても良い。言い換えれば、検出光を投光する光ファイバ２６Ａと、この光ファイバ２６Ａから投光した検出光を受光する光ファイバ２６Ｂとを向かい合わせに配置してもよい。 Note that the edge detection sensor 1 according to the present invention is not limited to be implemented with respect to the gripping device 5, and even when the sheet body W is positioned on the table, the table side or the table The present invention can be applied by providing the light projecting unit 2 and the light receiving unit 3 with respect to other members provided above.
In the embodiment described above, the light projecting port 2a and the light receiving port 3b are provided on the pressing surface 21a on the same plane (the same opposite side), but each of the light projecting port 2a and the light receiving port 3b is a pressing surface on the opposite side. You may provide in 20a, 21a. In other words, the optical fiber 26A that projects the detection light and the optical fiber 26B that receives the detection light projected from the optical fiber 26A may be arranged face to face.

上述した実施形態では、シート体Ｗの反射光（検出光をシート体Ｗに投光してシート体Ｗで反射した光）に基づいてシート体Ｗの縁部Ｗａを検出していたが、反射光ではなく透過光によってシート体Ｗの縁部Ｗａを検出してもよい。
上述した実施形態では、光ファイバ２６Ａと光ファイバ２６Ｂとを個別（別体）にしていたが、光ファイバ２６Ａ及び光ファイバ２６Ｂが一体型であるもの（例えば、平行型、同軸型、分割型）であってもよい。 In the above-described embodiment, the edge Wa of the sheet body W is detected based on the reflected light of the sheet body W (light that is detected by projecting detection light onto the sheet body W and reflected by the sheet body W). The edge Wa of the sheet body W may be detected not by light but by transmitted light.
In the embodiment described above, the optical fiber 26A and the optical fiber 26B are separate (separate), but the optical fiber 26A and the optical fiber 26B are integrated (for example, parallel type, coaxial type, split type). It may be.

１縁部検出センサ
２投光部
２ａ投光口
３受光部
３ａ受光口
５把持装置
１０移動機構
１１上部基枠
１２ガイドバー
１４ニップ機構
２０当接部材
２０ａ押圧面
２１支持部材
２１ａ押圧面
２２ニップ駆動部
２３連結部
２４屈曲部
２６Ａ光ファイバ
２６Ｂ光ファイバ
３０窓部
３１シャッター部材
３２揺動ピン
３５検出部
３５ａ投光素子
３５ｂ受光素子
Ｗシート体
Ｗａ縁部 DESCRIPTION OF SYMBOLS 1 Edge detection sensor 2 Light projecting part 2a Light projecting port 3 Light receiving part 3a Light receiving port 5 Gripping device 10 Moving mechanism 11 Upper base frame 12 Guide bar 14 Nip mechanism 20 Contact member 20a Press surface 21 Support member 21a Press surface 22 Nip Drive part 23 Connection part 24 Bending part 26A Optical fiber 26B Optical fiber 30 Window part 31 Shutter member 32 Swing pin 35 Detection part 35a Light projecting element 35b Light receiving element W Sheet body Wa Edge part

Claims

A contact member that is in surface contact with one surface of the sheet body;
A light projecting unit that projects detection light toward the sheet member in contact with the contact member;
A light receiving unit provided to receive the detection light projected by the light projecting unit;
A detection unit that detects the presence or absence of the sheet body based on the amount of light received by the light receiving unit,
The light projecting unit has a plurality of light projecting ports arranged in parallel so that detection light can be projected over a sheet body that is in contact with the contact member and an outer region that is off the edge of the sheet body. ,
The light receiving unit has a light receiving port individually corresponding to the light projecting port of the light projecting unit,
The detection unit has a determination unit individually corresponding to the light receiving port of the light receiving unit ,
A support member that can be moved closer to and away from the contact member is provided at an opposing position away from the contact member, and the sheet body is held flat by the contact member and the support member. An edge detection sensor for a sheet body, wherein detection light can be projected and received by the light projecting unit and the light receiving unit .

The sheet light edge detection sensor according to claim 1, wherein the light projecting unit and the light receiving unit include a light guide member formed of an optical fiber having a diameter φ of 2 mm or less.

The edge detection sensor for a sheet body according to claim 1 or 2, wherein the light projecting port and the light receiving port are arranged in parallel at an arrangement pitch of 2 mm or less.

The light projecting unit and the light receiving unit are provided adjacent to each other, and are disposed toward the contact member at an opposed position away from the contact member. a window portion part is transmitted through the detection light projected, to claim 1, characterized in that the shutter member for reflecting the detection light to the light receiving portion to close the window portion is provided The edge detection sensor of the sheet | seat body of any one of Claim 3.

The support member is provided with the light projecting portion and the light receiving portion on a surface that comes into contact with the sheet body, and a nip mechanism that moves the contact member toward and away from the support member. The edge detection sensor of the sheet | seat body of Claim 4 characterized by the above-mentioned.