JP2007275364A

JP2007275364A - Sewing machine

Info

Publication number: JP2007275364A
Application number: JP2006106724A
Authority: JP
Inventors: Atsushi Shiraishi; 篤史白石
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2006-04-07
Filing date: 2006-04-07
Publication date: 2007-10-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine having a simple mechanism and facilitating maintenance for preventing deterioration in sewing quality. <P>SOLUTION: A buttonholing presser foot 2 includes a connection portion 21 provided at the lower end of a pressing bar, a presser foot portion 22 for pressing an object to be sewn, a button-holding portion 24 for holding a button in association with the presser foot portion and moved in a feed direction of the object to be sewn, abutment portions 26, 27, and 28 provided so as to be externally exposed for instructing front and rear positions of buttonholing and a boundary position between an annular part and a straight part of eyelet buttonholing. A detection means 3 is provided at a sewing machine body, and detects the abutment portions by bringing the buttonholing presser foot moved during sewing operation into contact with the abutment portions at predetermined positions. During the eyelet buttonholing, the buttonholing presser foot 2 and the detection means 3 switches the feed direction of the eyelet buttonholing when the abutment portion at the front or rear position is detected, and switches sewing between the annular portion and the straight portion when the abutment portion at the boundary position is detected. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ボタン穴かがり縫いを行うことができるミシンに関する。 The present invention relates to a sewing machine that can perform buttonhole sewing.

ボタン穴かがりミシンにおいては、ボタンの大きさに応じてかがり縫いの長さを変えることが必要である。そのかがり縫いの長さを決定する方法としては、まず、図１３及び図１４に示すようなボタン穴かがり押さえ１００に設けられた、布を押さえる押さえ足部１０１に対してスライド移動するボタン保持部１０２を設け、押さえ足部１０１及びボタン保持部１０２に縫い長さの両端の位置を検出する突起１０３，１０４を設ける。さらに、ボタン保持部１０２が移動して突起１０３，１０４が所定位置に到達した際に突起１０３，１０４が接触するセンサ１０５を設ける。
具体的には、図１４に示すように、（ａ）に示す状態まで布を正送りで送りつつかがり縫いを行い、センサ１０５が一方の突起１０３に接触すると送りが逆送りに切り替えられて布を逆送りで送る。そして、（ｂ）に示す状態まで布が送られ、センサ１０５が他方の突起１０４に接触すると、送りが切り替えられて布を正送りで送りつつかがり縫いを行う（例えば、特許文献１参照。）。 In a buttonhole overlock sewing machine, it is necessary to change the length of overlock stitching according to the size of the button. As a method for determining the length of the overlock stitching, first, a button holding portion that is provided in a buttonhole overhanging press 100 as shown in FIGS. 102, and the presser foot portion 101 and the button holding portion 102 are provided with protrusions 103 and 104 for detecting the positions of both ends of the sewing length. Further, a sensor 105 is provided that contacts the protrusions 103 and 104 when the button holding portion 102 moves and the protrusions 103 and 104 reach a predetermined position.
Specifically, as shown in FIG. 14, the cloth is fed in the forward direction until the state shown in FIG. 14 (a), and when the sensor 105 contacts one of the protrusions 103, the feed is switched to the reverse feed and Is sent in reverse. When the cloth is fed to the state shown in (b) and the sensor 105 comes into contact with the other protrusion 104, the feed is switched, and the cloth is fed in the forward feed to perform the stitching (see, for example, Patent Document 1). .

ところで、穴かがり縫いには、図１５に示すように、鳩目縫いと呼ばれるものがある。鳩目縫いにおいては、縫い方が途中で変化するため、上記のように二箇所をセンサ１０５で検出するだけでは、縫い形式の切り替えをどこで行うかの指標がないため、鳩目縫いを適切に行うことができない。そこで、図１５に示すように、鳩目縫いのうち、縫い方向に沿って中央で分割し、左半分の環状部２００及び直線部２０１を縫い終わった後に右半分の環状部２０２及び直線部２０３を縫うといった方法をとっていた。しかし、このような縫製方法をとると、布を送る際に発生する滑り等により左右の縫い形状が異なる形状となったり、環状部２００，２０２の先端同士の位置がずれて縫製品質が低下するという問題があった。
鳩目縫いを行う場合におけるこのような問題を解決するため、図１６に示すように、鳩目縫いにおける環状部３００を一度に縫製し、その後、直線部３０１を縫製するという方法がある。しかし、この縫製方法をとると、別途ボタンの大きさを入力する装置が必要となり、縫い形状又は布の送り方向の境界を検出するセンサを必要とするので、より精度の高いセンサが必要となるという問題がある。 By the way, as shown in FIG. In eyelet stitching, the stitching method changes in the middle, so there is no indicator of where to switch the stitching type by simply detecting the two locations with the sensor 105 as described above, so that eyelet stitching should be performed appropriately. I can't. Therefore, as shown in FIG. 15, among the eyelet stitches, the center portion is divided along the sewing direction, and after the left half annular portion 200 and the straight portion 201 are sewn, the right half annular portion 202 and the straight portion 203 are formed. I used to sew. However, when such a sewing method is employed, the left and right sewing shapes are different due to slippage or the like that occurs when the cloth is fed, or the positions of the tips of the annular portions 200 and 202 are shifted, so that the quality of the sewing product is deteriorated. There was a problem.
In order to solve such problems when performing eyelet stitching, there is a method in which an annular portion 300 in eyelet stitching is sewn at a time and then a straight line portion 301 is sewn as shown in FIG. However, if this sewing method is taken, a separate device for inputting the size of the button is required, and a sensor for detecting the boundary of the sewing shape or the feed direction of the cloth is required, so a sensor with higher accuracy is required. There is a problem.

そこで、以上に掲げる問題を解決すべく、鳩目縫いにおいては、縫いの切り替えを三箇所に設けられたセンサで検出するように構成し、縫製品質の低下を防止することができる穴かがり縫いミシンが提案されている（例えば、特許文献２参照。）。
特開２０００−１０２６８１号公報特公平７−６１３８９号公報 Therefore, in order to solve the problems described above, in the stitch stitch sewing, it is configured so that the sewing switching is detected by sensors provided at three locations, and a hole sewing machine that can prevent deterioration of the sewing product quality is provided. It has been proposed (see, for example, Patent Document 2).
JP 2000-102681 A Japanese Patent Publication No. 7-61389

しかし、特許文献２においては、縫い形状又は布の送り方向の切り替えのタイミングを検出するセンサとして光電センサを用い、この光電センサをボタン穴かがり押さえの内部に設けていたため、ボタン穴かがり押さえの機構が複雑になり、コストが嵩むという問題があった。また、光電センサを用いる場合、その光路上に埃等が堆積するとセンサとして機能しないためメンテナンスをこまめに行う必要があるが、光電センサがボタン穴かがり押さえの内部に設けられていると、メンテナンスの際にボタン穴かがり押さえを分解しなければならないため、メンテナンスが困難であるという問題があった。 However, in Patent Document 2, a photoelectric sensor is used as a sensor for detecting the timing of switching the sewing shape or the cloth feed direction, and this photoelectric sensor is provided inside the buttonhole presser. However, there is a problem that the cost is increased. Also, when using a photoelectric sensor, if dust or the like accumulates on the optical path, it does not function as a sensor, so maintenance is required frequently.However, if the photoelectric sensor is provided inside the buttonhole presser, maintenance can be performed. However, there is a problem that maintenance is difficult because the buttonhole presser must be disassembled.

そこで、本発明は、上記課題を解決するためになされたものであり、簡単な機構でかつメンテナンスを容易に行うことができ、縫製品質の低下を防止することができるミシンを提供することを目的とする。 Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sewing machine that can be easily maintained with a simple mechanism and can prevent deterioration in quality of a sewing product. And

請求項１に記載の発明は、ミシンにおいて、ミシンの押さえ棒の下端に設けられた押さえホルダに取り付けられる連結部と、この連結部に摺動自在に保持され、縫製動作中に被縫製物の布送りに伴って移動しながら被縫製物を押さえる押さえ足部と、前記押さえ足部に摺動自在に保持され、前記押さえ足部とでボタンを保持し、前記押さえ足部に協働してボタンを保持した状態で被縫製物の送り方向に移動するボタン保持部と、前記押さえ足部及び前記ボタン保持部に設けられ、ボタン穴かがり縫いの前位置及び後位置と、さらに鳩目穴かがり縫いの環状部と直線部の境界位置とを、それぞれ指示するように外部に露出して設けた被当接部と、を備えたボタン穴かがり押さえと、ミシン本体に備えられ、前記押さえ棒の下端に設けられた前記ボタン穴かがり押さえが縫製動作中に移動しているときに、所定位置で各被当接部と接触させて各被当接部を検出する検出手段とにより、鳩目ボタン穴かがり縫い中に、前位置又は後位置の被当接部を検出したときに鳩目ボタン穴かがり縫いの送り方向を切り替えるとともに、境界位置の被当接部を検出したときに環状部と直線部の縫いを切り替えることを特徴とする。 According to the first aspect of the present invention, in the sewing machine, a connecting portion that is attached to a presser holder provided at the lower end of the presser bar of the sewing machine, and is slidably held by the connecting portion. A presser foot that presses the workpiece while moving with the cloth feed, and is slidably held by the presser foot, holds a button with the presser foot, and cooperates with the presser foot. A button holding portion that moves in the feed direction of the sewing product while holding the button, and provided at the presser foot portion and the button holding portion, the front and rear positions of the buttonhole stitching, and the eyelet stitching A button-hole-holding press provided with a contacted portion exposed to the outside so as to indicate the boundary position between the annular portion and the straight portion, and a lower end of the presser bar Provided in By detecting means for detecting each abutted portion by contacting each abutted portion at a predetermined position when the tongue hole overturning press is moving during the sewing operation, When the abutted portion at the position or the rear position is detected, the feeding direction of the eyelet buttonhole sewing is switched, and when the abutted portion at the boundary position is detected, the sewing between the annular portion and the straight portion is switched. And

請求項１に記載の発明によれば、ボタン保持部と押さえ足部とでボタンを保持し、連結部に摺動自在に保持された押さえ足部で被縫製物を押さえて被縫製物を送りながら縫製を行うと、縫製動作に協働して押さえ足部も被縫製物の送り方向に移動する。押さえ足部が移動すると、押さえ足部及びボタン保持部に設けられた被当接部も同方向に移動し、被当接部が所定位置に到達すると、検出手段が各被当接部の存在を検出する。このようなボタン穴かがり押さえと検出手段により、鳩目ボタン穴かがり縫い中に、前位置又は後位置の被当接部を検出したときに鳩目ボタン穴かがり縫いの送り方向を切り替えるとともに、境界位置の被当接部を検出したときに環状部と直線部の縫いを切り替える。
これにより、鳩目ボタン穴かがり縫いの送り方向の切り替えや環状部と直線部の縫いの切り替えは、検出手段とボタン穴かがり押さえにより行われるので、光電センサのように光路上への埃等の堆積による未検出といった問題を解消することができる。
また、検出手段は外部に露出するように設けられた被当接部に当接するように構成されているので、押さえ足部周辺の機構を簡単にすることができ、メンテナンスを容易に行うことができ、メンテナンス不良による縫製品質の低下を防止することができる。 According to the first aspect of the present invention, the button is held by the button holding portion and the presser foot portion, and the sewing product is fed by pressing the workpiece with the presser foot portion slidably held by the connecting portion. However, if sewing is performed, the presser foot portion also moves in the feed direction of the workpiece in cooperation with the sewing operation. When the presser foot part moves, the contacted parts provided on the presser foot part and the button holding part also move in the same direction, and when the contacted part reaches a predetermined position, the detecting means is provided with each contacted part. Is detected. With such a buttonhole presser and detection means, when the abutment portion at the front position or the rear position is detected during eyelet buttonhole sewing, the feed direction of the eyelet buttonhole sewing is switched and the boundary position When the contacted portion is detected, the sewing between the annular portion and the straight portion is switched.
As a result, the switching of the feeding direction of the eyelet buttonhole sewing and the switching between the annular portion and the straight portion is performed by the detection means and the buttonhole presser, so that dust or the like accumulates on the optical path like a photoelectric sensor. The problem of non-detection due to can be solved.
In addition, since the detecting means is configured to come into contact with the contacted portion provided so as to be exposed to the outside, the mechanism around the presser foot can be simplified and maintenance can be easily performed. It is possible to prevent deterioration of the quality of the sewing product due to poor maintenance.

請求項２に記載の発明は、請求項１に記載のミシンにおいて、前記検出手段は、前記押さえ足部が未装着である第１の状態と、前記被当接部に当接していない第２の状態と、前記被当接部に当接した第３の状態と、を検出可能であることを特徴とする。 According to a second aspect of the present invention, in the sewing machine according to the first aspect, the detection means includes a first state in which the presser foot portion is not attached and a second state in which the presser foot portion is not in contact with the contacted portion. It is possible to detect the state 3 and the third state in contact with the contacted portion.

請求項２に記載の発明によれば、検出手段は、被当接部への当接の有無だけでなく、押さえ足部が未装着であることも検出できるので、押さえ足部の装着の確認を検出手段で行うことができる。 According to the second aspect of the present invention, the detection means can detect not only the presence / absence of contact with the abutted portion but also that the presser foot portion is not attached. Can be performed by the detection means.

請求項３に記載の発明は、ミシンの押さえ棒の下端に設けられた押さえホルダに取り付けられる連結部と、この連結部に摺動自在に保持され、縫製動作中に被縫製物の布送りに伴って移動しながら被縫製物を押さえる押さえ足部と、前記押さえ足部に摺動自在に保持され、前記押さえ足部とでボタンを保持し、前記押さえ足部に協働してボタンを保持した状態で被縫製物の送り方向に移動するボタン保持部と、前記押さえ足部及び前記ボタン保持部に設けられ、ボタン穴かがり縫いの前位置及び後位置と、さらに鳩目穴かがり縫いの環状部と直線部の境界位置とを、それぞれ指示するように外部に露出して設けた反射板と、を備えたボタン穴かがり押さえと、ミシン本体に備えられ、前記押さえ棒の下端に設けられた前記ボタン穴かがり押さえが縫製動作中に移動しているときに、所定位置で対向する反射板に向けて発光する発光部と、ミシン本体に備えられ、前記発光部から発光された光が前記反射板に当たって反射された光を受光する受光部と、を備えた検出手段とにより、鳩目ボタン穴かがり縫い中に、前位置又は後位置における反射板からの反射光を検出したときに鳩目ボタン穴かがり縫いの送り方向を切り替えるとともに、境界位置における反射板からの反射光を検出したときに環状部と直線部の縫いを切り替えることを特徴とする。 According to the third aspect of the present invention, there is provided a connecting portion attached to a presser holder provided at the lower end of the presser bar of the sewing machine, and slidably held by the connecting portion, and can be used to feed the cloth to be sewn during the sewing operation. A presser foot that presses the workpiece while moving, and is slidably held by the presser foot, holds the button with the presser foot, and holds the button in cooperation with the presser foot. Button holding part that moves in the feed direction of the sewing product in a state in which the sewing product is moved, and the front and rear positions of the buttonhole stitching and the annular part of the eyelet stitching provided on the presser foot part and the button holding part And a boundary position of the straight line portion, and a reflection plate provided to be exposed to the outside so as to indicate each, a buttonhole presser provided with a sewing machine main body, and provided at the lower end of the presser bar Button hole pressed When the sewing machine is moving during the sewing operation, the light emitting unit that emits light toward the reflecting plate that faces at a predetermined position and the sewing machine main body, the light emitted from the light emitting unit hits the reflecting plate and is reflected. And a light receiving unit that receives light, and when detecting reflected light from the reflector at the front position or the rear position during the eyelet buttonhole sewing, the feeding direction of the eyelet buttonhole sewing is determined. In addition to switching, when the reflected light from the reflecting plate at the boundary position is detected, the sewing of the annular portion and the straight portion is switched.

請求項３に記載の発明によれば、ボタン保持部と押さえ足部とでボタンを保持し、連結部に摺動自在に保持された押さえ足部で被縫製物を押さえて被縫製物を送りながら縫製を行うと、縫製動作に協働して押さえ足部も被縫製物の送り方向に移動する。押さえ足部が移動すると、押さえ足部及びボタン保持部に設けられた反射板も同方向に移動し、反射板が所定位置に到達すると、検出手段を構成する発光部から発光された光が所定位置に到達した反射板に当たって反射し、受光部で受光される。このようなボタン穴かがり押さえと検出手段により、鳩目ボタン穴かがり縫い中に、前位置又は後位置の反射板を検出したときに鳩目ボタン穴かがり縫いの送り方向を切り替えるとともに、境界位置の反射板を検出したときに環状部と直線部の縫いを切り替える。
これにより、鳩目ボタン穴かがり縫いの送り方向の切り替えや環状部と直線部の縫いの切り替えは、発光部及び受光部と押さえ足部及びボタン保持部に設けられた反射板とによって検出されるので、発光部及び受光部と押さえ足部及びボタン保持部とを接触させることなく押さえ足部が所定位置に到達したことを検出することができる。なお、縫い形状又は被縫製物の送り方向の切り替えタイミングの検出に光を利用することにより光路上への埃等の堆積による問題が考えられるが、反射板は露出するように設けられているため、埃等の除去を容易に行うことができ、メンテナンスを容易に行うことができる。また、押さえ足部及び少なくとも三つ以上の反射板を設けて発光部及び受光部で検出することができるので、鳩目縫いのように縫い形状又は被縫製物の送り方向の切り替えにも対応することができ、縫製品質の低下を防止することができる。 According to the third aspect of the present invention, the button is held by the button holding portion and the presser foot portion, and the sewing product is fed by pressing the workpiece with the presser foot portion slidably held by the connecting portion. However, if sewing is performed, the presser foot portion also moves in the feed direction of the workpiece in cooperation with the sewing operation. When the presser foot part moves, the reflectors provided on the presser foot part and the button holding part also move in the same direction. When the reflector plate reaches a predetermined position, the light emitted from the light emitting part constituting the detection means is predetermined. The light hits the reflecting plate that has reached the position, is reflected, and is received by the light receiving unit. With such a buttonhole presser and detecting means, when the front or rear reflector is detected during eyelet buttonhole sewing, the feeding direction of the eyelet buttonhole sewing is switched and the reflector at the boundary position When sewing is detected, the sewing of the annular portion and the straight portion is switched.
As a result, the switching of the feeding direction of the eyelet buttonhole stitching and the switching of the sewing between the annular portion and the straight portion are detected by the light emitting portion, the light receiving portion, the presser foot portion, and the reflector provided on the button holding portion. It is possible to detect that the presser foot has reached a predetermined position without bringing the light emitting unit and the light receiving unit into contact with the presser foot and the button holding unit. In addition, there may be a problem due to accumulation of dust or the like on the optical path by using light to detect the timing for switching the sewing shape or the feed direction of the workpiece, but the reflector is provided so as to be exposed. In addition, dust and the like can be easily removed, and maintenance can be easily performed. Also, since the presser foot and at least three or more reflectors can be provided and detected by the light emitting part and the light receiving part, it is possible to cope with switching of the sewing shape or the feed direction of the sewing product as in the case of eyelet stitching. It is possible to prevent deterioration of the quality of the sewing product.

請求項１に記載の発明によれば、鳩目ボタン穴かがり縫いの送り方向の切り替えや環状部と直線部の縫いの切り替えは、検出手段とボタン穴かがり押さえにより行われるので、光電センサのように光路上への埃等の堆積による未検出といった問題を解消することができる。
また、検出手段は外部に露出するように設けられた被当接部に当接するように構成されているので、押さえ足部周辺の機構を簡単にすることができ、メンテナンスを容易に行うことができ、メンテナンス不良による縫製品質の低下を防止することができる。 According to the first aspect of the present invention, switching of the feed direction of the eyelet buttonhole stitching and switching of the sewing between the annular portion and the straight portion is performed by the detection means and the buttonhole stitching press, so that the photoelectric sensor The problem of undetected due to accumulation of dust or the like on the optical path can be solved.
In addition, since the detecting means is configured to come into contact with the contacted portion provided so as to be exposed to the outside, the mechanism around the presser foot can be simplified and maintenance can be easily performed. It is possible to prevent deterioration of the quality of the sewing product due to poor maintenance.

請求項３に記載の発明によれば、鳩目ボタン穴かがり縫いの送り方向の切り替えや環状部と直線部の縫いの切り替えは、発光部及び受光部と押さえ足部及びボタン保持部に設けられた反射板とによって検出されるので、発光部及び受光部と押さえ足部及びボタン保持部とを接触させることなく押さえ足部が所定位置に到達したことを検出することができる。なお、縫い形状又は被縫製物の送り方向の切り替えタイミングの検出に光を利用することにより光路上への埃等の堆積による問題が考えられるが、反射板は露出するように設けられているため、埃等の除去を容易に行うことができ、メンテナンスを容易に行うことができる。また、押さえ足部及び少なくとも三つ以上の反射板を設けて発光部及び受光部で検出することができるので、鳩目縫いのように縫い形状又は被縫製物の送り方向の切り替えにも対応することができ、縫製品質の低下を防止することができる。 According to the third aspect of the present invention, switching of the feeding direction of the eyelet buttonhole stitching and switching of the sewing of the annular portion and the straight portion is provided in the light emitting portion, the light receiving portion, the presser foot portion, and the button holding portion. Since it is detected by the reflecting plate, it is possible to detect that the presser foot has reached a predetermined position without bringing the light emitting unit and the light receiving unit into contact with the presser foot and the button holding unit. In addition, there may be a problem due to accumulation of dust or the like on the optical path by using light to detect the timing for switching the sewing shape or the feed direction of the workpiece, but the reflector is provided so as to be exposed. In addition, dust and the like can be easily removed, and maintenance can be easily performed. Also, since the presser foot and at least three or more reflectors can be provided and detected by the light emitting part and the light receiving part, it is possible to cope with switching of the sewing shape or the feed direction of the sewing product as in the case of eyelet stitching. It is possible to prevent deterioration of the quality of the sewing product.

以下、図面を参照して、ミシンの最良の形態について詳細に説明する。なお、本実施形態では、ミシンとして、ボタン穴かがり縫いミシンを例に挙げて説明する。
＜ミシンの構成＞
図１に示すように、ミシン１０には、押さえ棒１がミシン１０の上下方向に移動可能に設けられている。
押さえ棒１の下端には、押さえホルダ（図示略）が設けられ、この押さえホルダには、被縫製物たる布を押さえるボタン穴かがり押さえ２が設けられている。
ボタン穴かがり押さえ２は、その下面が布の載置される針板Ｐの上面に対向するように配置されている。
図２に示すように、ボタン穴かがり押さえ２は、押さえ棒１の下端に設けられた押さえホルダに取り付けられた連結部２１と、連結部２１に摺動自在に保持され、布を上方から押さえるとともに縫製動作中に布の布送りに伴って移動しながら布を押さえる押さえ足部２２と、この押さえ足部２２の下方に位置するように押さえ足部２２に連結され、押さえ足部２２とで布を挟み込むプレート２３（図５参照）と、押さえ足部２２に摺動自在に保持され、押さえ足部２２とでボタンを保持し、押さえ足部２２に協働してボタンを保持した状態で布の送り方向に移動するボタン保持部２４と、押さえ足部２２の上面に設けられたカバー部材２５等を備えている。 Hereinafter, the best mode of the sewing machine will be described in detail with reference to the drawings. In the present embodiment, a buttonhole stitch sewing machine will be described as an example of the sewing machine.
<Configuration of sewing machine>
As shown in FIG. 1, a presser bar 1 is provided on the sewing machine 10 so as to be movable in the vertical direction of the sewing machine 10.
A press holder (not shown) is provided at the lower end of the press bar 1, and a button hole presser 2 that presses a cloth as a sewing object is provided in the press holder.
The buttonhole presser 2 is disposed such that the lower surface thereof faces the upper surface of the needle plate P on which the cloth is placed.
As shown in FIG. 2, the buttonhole presser 2 is connected to a presser holder provided at the lower end of the presser bar 1, and is slidably held by the connecter 21 to press the cloth from above. At the same time, the presser foot 22 that presses the cloth while moving as the cloth is fed during the sewing operation is connected to the presser foot 22 so as to be positioned below the presser foot 22, In a state where the plate 23 (see FIG. 5) sandwiching the cloth and the presser foot part 22 are slidably held, the button is held by the presser foot part 22, and the button is held in cooperation with the presser foot part 22. A button holding portion 24 that moves in the cloth feeding direction, a cover member 25 provided on the upper surface of the presser foot portion 22, and the like are provided.

（連結部）
図３は、連結部２１の平面図である。図３に示すように、連結部２１の上面には、押さえ棒１の下端に設けられた押さえホルダが連結部２１を把持して連結するための連結棒２１ａが設けられている。従って、押さえホルダによる連結棒２１ａの把持及び解放により押さえ足部２２を押さえ棒１に着脱自在とすることができる。連結部２１の下面側には、押さえ足部２２の開口２２ａ（図４参照）及びプレート２３の開口２３ａ（図５参照）に嵌り込んで当該開口２２ａ，２３ａの長手方向に沿って摺動可能となるように形成されたガイド突起（図示略）が形成されている。
連結部２１は、下面に設けられたガイド突起（図示略）を開口２２ａ，２３ａに嵌め込むことにより、押さえ足部２２の上面における開口２２ａの周囲に形成されたくぼみ２２ｂに嵌め込まれる。そして、上方からカバー部材２５（図７参照）を設けることにより、連結部２１のくぼみ２２ｂからの離脱を防止する。 (Connecting part)
FIG. 3 is a plan view of the connecting portion 21. As shown in FIG. 3, a connecting rod 21 a is provided on the upper surface of the connecting portion 21 so that a holding holder provided at the lower end of the holding rod 1 holds and connects the connecting portion 21. Accordingly, the presser foot 22 can be attached to and detached from the presser bar 1 by gripping and releasing the connecting bar 21a by the presser holder. The connecting portion 21 is slidable along the longitudinal direction of the openings 22a and 23a by fitting into the opening 22a (see FIG. 4) of the presser foot portion 22 and the opening 23a (see FIG. 5) of the plate 23 on the lower surface side. Guide protrusions (not shown) formed so as to be formed are formed.
The coupling portion 21 is fitted into a recess 22b formed around the opening 22a on the upper surface of the presser foot portion 22 by fitting a guide protrusion (not shown) provided on the lower surface into the openings 22a and 23a. Then, by providing the cover member 25 (see FIG. 7) from above, the connecting portion 21 is prevented from being detached from the recess 22b.

（押さえ足部）
図４は、押さえ足部２２の平面図である。図４に示すように、押さえ足部２２は、一方に長尺な板材から形成され、一方の端部近傍から中央付近にわたって、その長手方向に沿って長尺な矩形状の開口２２ａが形成されている。この開口２２ａは、針落ちさせるための開口である。押さえ足部２２には、長手方向に沿った対向する両側縁にカバー部材５に係合する係合爪２２ｃが形成されている。この係合爪２２ｃは押さえ足部２２と一体形成されていてもよいし、別個に設けられていてもよい。
押さえ足部２２の他端近傍には、ボタン保持部２４（図６参照）の一部が嵌め込まれ、ボタン保持部２４の長手方向への移動を可能とする溝２２ｄが形成されている。 (Holding foot)
FIG. 4 is a plan view of the presser foot portion 22. As shown in FIG. 4, the presser foot portion 22 is formed of a long plate material on one side, and has a rectangular opening 22 a that is long along the longitudinal direction from the vicinity of one end portion to the vicinity of the center. ing. The opening 22a is an opening for dropping the needle. The presser foot portion 22 is formed with engaging claws 22c that engage with the cover member 5 at opposite side edges along the longitudinal direction. The engaging claw 22c may be formed integrally with the presser foot 22 or may be provided separately.
In the vicinity of the other end of the presser foot portion 22, a part of the button holding portion 24 (see FIG. 6) is fitted, and a groove 22d that allows the button holding portion 24 to move in the longitudinal direction is formed.

押さえ足部２２の他端には、ボタンの一部の周縁に沿って形成され、ボタン保持部２４とでボタンを支持するボタン支持部２２ｅが設けられている。このボタン支持部２２ｅは押さえ足部２２と一体形成されていてもよいし、別個に設けられていてもよい。
押さえ足部２２の長手方向に沿った一側縁の一部は、外側に向けて張り出すように形成されており、その張り出した部分には、プレート２３の一部が挿通される挿通孔２２ｆが形成されている。
押さえ足部２２の上面側側縁には、押さえ足部２２の長手方向に沿って延び、ボタン保持部２４のスライド移動を案内するスライド溝２２ｇが形成されている。 At the other end of the presser foot portion 22, a button support portion 22 e that is formed along the peripheral edge of a part of the button and supports the button with the button holding portion 24 is provided. The button support portion 22e may be integrally formed with the presser foot portion 22, or may be provided separately.
A part of one side edge along the longitudinal direction of the presser foot portion 22 is formed so as to protrude outward, and the insertion hole 22f through which a part of the plate 23 is inserted is inserted into the protruding portion. Is formed.
A slide groove 22 g that extends along the longitudinal direction of the presser foot portion 22 and guides the slide movement of the button holding portion 24 is formed on the upper side edge of the presser foot portion 22.

押さえ足部２２におけるスライド溝２２ｇの一端には、外部に露出するとともに押さえ足部２２の側方に向けて突出する被当接部としての突部２６が形成されている。
突部２６は、押さえ足部２２の側方に最も突出するように形成され、その先端は押さえ足部２２の長手方向に沿って平行に延びるように形成されている。突部２６は、ボタン穴かがり縫いの前位置を指示するものである。 At one end of the slide groove 22 g in the presser foot portion 22, a protrusion 26 is formed as a contacted portion that is exposed to the outside and protrudes toward the side of the presser foot portion 22.
The protruding portion 26 is formed so as to protrude most to the side of the presser foot portion 22, and the tip thereof is formed to extend in parallel along the longitudinal direction of the presser foot portion 22. The protrusion 26 indicates the front position of buttonhole sewing.

また、押さえ足部２２には、突部２６と同様に外部に露出するとともに押さえ足部２２の側方に向けて突出する被当接部としての突部２７が形成されている。突部２７は、押さえ足部２２の側方に最も突出するように形成され、その先端は尖るように形成されている。また、突部２６と突部２７は、押さえ足部２２の側方への突出量が略等しくなるように形成されている。突部２７は、鳩目穴かがり縫いの環状部と直線部の境界位置を指示するものである。 Further, the presser foot 22 is formed with a protrusion 27 as a contacted portion that is exposed to the outside and protrudes toward the side of the presser foot 22 in the same manner as the protrusion 26. The protruding portion 27 is formed so as to protrude most to the side of the presser foot portion 22, and its tip is formed to be sharp. Further, the protrusion 26 and the protrusion 27 are formed so that the amount of protrusion to the side of the presser foot 22 is substantially equal. The protrusion 27 indicates the boundary position between the annular portion and the straight portion of the eyelet stitching.

（プレート）
図５に示すように、プレート２３は、一方に長尺な板材から形成され、一方の端部近傍から中央付近にわたって、その長手方向に沿って長尺な矩形状の開口２３ａが形成されている。この開口２３ａは、針落ちさせるための開口であり、押さえ足部２２とプレート２３を重ね合わせた際に、互いの開口２２ａ，２３ａ同士も重なり合うように形成されている。
プレート２３の長手方向に沿った一側縁の一端部は、外側に向けて張り出すように形成されており、その張り出した部分には、押さえ足部２２の挿通孔２２ｆに挿通するためにプレート２３の上面に対してほぼ直角をなすように立てて形成された立部２３ｂが形成されている。 (plate)
As shown in FIG. 5, the plate 23 is formed of a long plate material on one side, and is formed with a long rectangular opening 23a along the longitudinal direction from the vicinity of one end to the vicinity of the center. . The opening 23a is an opening for dropping the needle, and is formed so that the openings 22a and 23a overlap each other when the presser foot portion 22 and the plate 23 are overlapped.
One end of one side edge along the longitudinal direction of the plate 23 is formed so as to protrude outward, and the protruding portion is a plate for inserting into the insertion hole 22f of the presser foot portion 22. A standing portion 23 b is formed so as to be substantially perpendicular to the upper surface of 23.

（ボタン保持部）
図６に示すように、ボタン保持部２４は、押さえ足部２２に対して摺動自在に設けられ、縫製動作に協働してボタンを保持した状態で布の送り方向に移動するように設けられている。ボタン保持部２４は、土台２４ａを備えており、この土台２４ａには、押さえ足部２２に設けられたボタン支持部２２ｅとでボタンを保持するボタン支持部２４ｂを備えている。ボタン支持部２４ｂは、押さえ足部２２に形成された溝２２ｄに対してスライド移動自在に嵌め込まれるガイド爪２４ｃと、ボタン支持部２４ｂに対向配置され、ボタンの外周に合わせて形成されたボタン当接部２４ｄと、を備えている。 (Button holding part)
As shown in FIG. 6, the button holding portion 24 is slidably provided with respect to the presser foot portion 22, and is provided so as to move in the cloth feeding direction while holding the button in cooperation with the sewing operation. It has been. The button holding unit 24 includes a base 24 a. The base 24 a includes a button support 24 b that holds a button with a button support 22 e provided on the presser foot 22. The button support 24b is disposed so as to be opposed to the guide claw 24c slidably fitted in the groove 22d formed in the presser foot 22 and the button support 24b, and is formed to match the outer periphery of the button. A contact portion 24d.

土台２４ａの上面には、ユーザがボタン保持部２４をスライドさせるためのツマミ２４ｅが立設されている。
土台２４ａの下面には、押さえ足部２２に形成されたスライド溝２２ｇに嵌り込むガイドレール２４ｆが設けられている。ガイドレール２４ｆを押さえ足部２２のスライド溝２２ｇに嵌め込むことにより、ボタン支持部２４ｂは、押さえ足部２２のボタン支持部２２ｅに対して接離可能となる。これにより、ボタンの大きさに合わせてボタン保持部２４の移動量が変化し、ボタン穴かがり縫いの長さも変化する。 On the upper surface of the base 24a, a knob 24e for allowing the user to slide the button holding portion 24 is erected.
A guide rail 24f that fits into a slide groove 22g formed in the presser foot portion 22 is provided on the lower surface of the base 24a. By fitting the guide rail 24 f into the slide groove 22 g of the presser foot portion 22, the button support portion 24 b can be brought into contact with and separated from the button support portion 22 e of the presser foot portion 22. As a result, the amount of movement of the button holding portion 24 changes in accordance with the size of the button, and the length of buttonhole stitching also changes.

ボタン保持部２４の側方でガイドレール２４ｆの先端には、外部に露出するようにガイドレール２４ｆから突出し、ガイドレール２４ｆの延びる方向に対して略直角をなす方向、かつ、土台２４ａ上面に沿った方向に突出する被当接部としての突部２８が設けられている。突部２８は、ボタン保持部２４に形成されているため、ボタン保持部２４の移動とともにその位置を変えることができるようになっている。すなわち、押さえ足部のボタン支持部２２ｅとボタン保持部２４のボタン支持部２４ｂとで保持するボタンの大きさによって位置が変わる。 The tip of the guide rail 24f on the side of the button holding portion 24 protrudes from the guide rail 24f so as to be exposed to the outside, and is substantially perpendicular to the extending direction of the guide rail 24f and along the upper surface of the base 24a. A protruding portion 28 is provided as a contacted portion that protrudes in the vertical direction. Since the protrusion 28 is formed on the button holding portion 24, the position of the protrusion 28 can be changed as the button holding portion 24 moves. That is, the position changes depending on the size of the button held by the button support portion 22e of the presser foot portion and the button support portion 24b of the button holding portion 24.

突部２８は、ボタン保持部２４及び押さえ足部２２の側方に突出するように形成され、その先端はボタン保持部２４のスライド移動方向に沿って平行に延びるように形成されている。突部２８の先端は、ボタン保持部２４を押さえ足部２２に取り付ける、ガイドレール２４ｆをスライド溝２２ｇに嵌め込んだ際に押さえ足部２２の突部２６及び突部２７の先端と同じ高さ、言い換えると同一直線上に並ぶように形成されている。なお、これらの突部２６，２７，２８の先端を結ぶ直線はボタン保持部２４のスライド移動方向に略平行となる。突部２８は、ボタン穴かがり縫いの後位置を指示するものである。 The projecting portion 28 is formed so as to project to the side of the button holding portion 24 and the presser foot portion 22, and the tip thereof is formed to extend in parallel along the sliding movement direction of the button holding portion 24. The tip of the protrusion 28 is the same height as the tips of the protrusion 26 and the protrusion 27 of the holding foot 22 when the button holding portion 24 is attached to the holding foot 22 and the guide rail 24f is fitted in the slide groove 22g. In other words, they are formed so as to be aligned on the same straight line. A straight line connecting the tips of the protrusions 26, 27, and 28 is substantially parallel to the sliding movement direction of the button holding unit 24. The protrusion 28 indicates the position after the buttonhole sewing.

（カバー部材）
図７に示すように、カバー部材２５は、一方に長尺な板材から形成され、一方の端部近傍から中央付近にわたって、その長手方向に沿って長尺な矩形状の開口２５ａが形成されている。この開口２５ａは、針落ちさせるための開口であり、押さえ足部２２及びプレート２３とカバー部材２５を重ね合わせた際に、互いの開口２２ａ，２３ａ，２５ａ同士も重なり合うように形成されている。
カバー部材２５には、長手方向に沿った対向する両側縁に押さえ足部２２の係合爪２２ｃに係合する係合受部２５ｃが形成されている。この係合受部２５ｃはカバー部材２５と一体形成されていてもよいし、別個に設けられていてもよい。
カバー部材２５には、ボタン保持部２４の上方への浮き上がりを防止するための規制板２５ｄが設けられている。規制板２５ｄは、ボタン保持部２４のガイドレール２４ｆの上方に配置され、ガイドレール２４ｆが押さえ足部２２のスライド溝２２ｇから離脱するのを防止する。 (Cover member)
As shown in FIG. 7, the cover member 25 is formed of a long plate material on one side, and has a rectangular opening 25a that is long along the longitudinal direction from the vicinity of one end to the vicinity of the center. Yes. The opening 25a is an opening for dropping the needle, and is formed so that the openings 22a, 23a, and 25a overlap each other when the presser foot portion 22 and the plate 23 and the cover member 25 are overlapped.
The cover member 25 is formed with engagement receiving portions 25c that engage with the engaging claws 22c of the presser foot portion 22 on opposite side edges along the longitudinal direction. The engagement receiving portion 25c may be integrally formed with the cover member 25 or may be provided separately.
The cover member 25 is provided with a regulating plate 25d for preventing the button holding portion 24 from being lifted upward. The restricting plate 25 d is disposed above the guide rail 24 f of the button holding portion 24 and prevents the guide rail 24 f from being detached from the slide groove 22 g of the presser foot portion 22.

（スイッチ）
突部２６，２７，２８の移動経路上には、押さえ棒１の下端に設けられたボタン穴かがり押さえ２が縫製動作中に移動しているときに、所定位置で各突起２６，２７，２８と接触させて各突起２６，２７，２８を検出する検出手段としてのスイッチ３が設けられている。
図８に示すように、スイッチ３は、ボタン穴かがり押さえ２の上方に位置するミシン本体Ｆに設けられている。スイッチ３は、ミシン本体Ｆに垂下支持された板状の検出板３１を備えている。検出板３１は、その長手方向の中央近傍でミシン本体Ｆに対して回動自在に取り付けられており、その上部及び下部がミシン１０の上下方向及びボタン保持部２４の移動方向（布送り方向）に対して略直角をなす方向に移動可能とされている。 (switch)
On the movement path of the protrusions 26, 27, 28, when the buttonhole guard 2 provided at the lower end of the presser bar 1 is moving during the sewing operation, the protrusions 26, 27, 28 at predetermined positions. A switch 3 is provided as detection means for detecting the protrusions 26, 27, and 28 in contact with each other.
As shown in FIG. 8, the switch 3 is provided on the sewing machine main body F located above the buttonhole presser 2. The switch 3 includes a plate-shaped detection plate 31 that is supported by the sewing machine body F in a suspended manner. The detection plate 31 is rotatably attached to the sewing machine main body F in the vicinity of the center in the longitudinal direction, and the upper and lower parts thereof are the vertical direction of the sewing machine 10 and the moving direction (cloth feeding direction) of the button holding unit 24. It is possible to move in a direction substantially perpendicular to the direction.

検出板３１の回動による上部の移動経路上には、検出板３１を挟み込むように二つの接点３２，３３が設けられている。接点３２は検出板３の下部に設けられた当接部材３４が突部２６，２７，２８の移動経路上に進出するように回動したときに検出板３１の上部が当接するように配置されている。接点３３は検出板３１の下部に設けられた当接部材３４が突部２６，２７，２８の移動経路から退避するように回動したときに検出板３１の上部が当接するように配置されている。従って、当接部材３４は、所定位置で突部２６，２７，２８の移動経路上に進退自在とされている。ここで、所定位置とは、当接部材３４が突部２７と突部２８との間で突部２７，２８の移動経路上に進退するように、ユーザにより任意に決定される位置である。 Two contact points 32 and 33 are provided on the upper movement path by the rotation of the detection plate 31 so as to sandwich the detection plate 31. The contact 32 is arranged so that the upper part of the detection plate 31 contacts when the contact member 34 provided at the lower part of the detection plate 3 rotates so as to advance on the movement path of the protrusions 26, 27, 28. ing. The contact 33 is arranged so that the upper part of the detection plate 31 contacts when the contact member 34 provided at the lower part of the detection plate 31 rotates so as to retract from the movement path of the protrusions 26, 27, 28. Yes. Therefore, the abutting member 34 can advance and retreat on the movement path of the protrusions 26, 27, 28 at a predetermined position. Here, the predetermined position is a position arbitrarily determined by the user so that the contact member 34 advances and retreats between the protrusion 27 and the protrusion 28 on the movement path of the protrusions 27 and 28.

検出板３１の下端には、検出板３１の回動により突部２６，２７，２８の移動経路上に進退自在とされた当接部材３４が設けられている。また、検出板３１の下端は、付勢手段であるバネ３５によりミシン本体Ｆと連結され、ボタン保持部２４に向けて付勢されている。ここで、バネ３５の付勢力は、検出板３１の下端に設けられた当接部材３４の先端が、押さえ棒１にボタン穴かがり押さえ２を取り付けなかった場合における突部２６，２７，２８よりもボタン穴かがり押さえ２の内側に移動するような力となっている。すなわち、押さえ棒１にボタン穴かがり押さえ２が取り付けられていないときには、当接部材３４が各突部２６，２７，２８の先端よりもボタン穴かがり押さえ２の内部に進出し、検出板３１の上部は接点３２に当接する。 An abutting member 34 is provided at the lower end of the detection plate 31. The contact member 34 can be moved forward and backward along the movement path of the protrusions 26, 27, 28 by the rotation of the detection plate 31. Further, the lower end of the detection plate 31 is connected to the sewing machine main body F by a spring 35 that is an urging means and is urged toward the button holding portion 24. Here, the urging force of the spring 35 is such that the tip of the abutting member 34 provided at the lower end of the detection plate 31 is from the protrusions 26, 27, 28 when the buttonhole presser 2 is not attached to the presser bar 1. The force is such that it moves to the inside of the buttonhole presser 2. That is, when the buttonhole guard 2 is not attached to the presser bar 1, the abutting member 34 advances into the buttonhole retainer 2 rather than the tips of the protrusions 26, 27, 28, and the detection plate 31. The upper part contacts the contact 32.

また、図９に示すように、当接部材３４は、検出板３１が接点３２と接点３３との中間位置にあるときに、その先端がボタン保持部２４の側面に当接するように配置されている。すなわち、押さえ棒１にボタン穴かがり押さえ２が設けられている場合であって、当接部材３４が突部２６，２７，２８に当接していない場合には、検出板３１は接点３２，３３のいずれにも当接することがなく、ボタン保持部２４は当接部材３４の先端に対して摺動する。
また、図１０に示すように、検出板３１は、当接部材３４が突部２６，２７，２８に当接した場合に接点３３に当接するように配置されている。
従って、スイッチ３からは、押さえ足部２２が未装着である第１の状態（図８の状態）と、突部２６，２７，２８に当接していない第２の状態（図９の状態）と、被当接部２６，２７，２８に当接した第３の状態（図１０の状態）と、が検出可能である。 Further, as shown in FIG. 9, the abutting member 34 is arranged so that the tip thereof abuts the side surface of the button holding portion 24 when the detection plate 31 is at an intermediate position between the contact 32 and the contact 33. Yes. That is, in the case where the presser bar 1 is provided with the buttonhole guard 2 and the contact member 34 is not in contact with the protrusions 26, 27, 28, the detection plate 31 has the contacts 32, 33. The button holding part 24 slides with respect to the tip of the contact member 34.
As shown in FIG. 10, the detection plate 31 is arranged so as to contact the contact 33 when the contact member 34 contacts the protrusions 26, 27, 28.
Therefore, from the switch 3, the first state (the state shown in FIG. 8) in which the presser foot portion 22 is not attached and the second state (the state shown in FIG. 9) that is not in contact with the protrusions 26, 27, 28. And the third state (the state shown in FIG. 10) in contact with the contacted portions 26, 27, and 28 can be detected.

（制御装置）
ミシン１０には、縫製についての制御を行う制御装置４が設けられている。
図１１に示すように、制御装置４は、縫製に関する処理プログラム、主軸モータ等の駆動制御に関するプログラムに従って各処理を実行するＣＰＵ４１と、各処理プログラムを展開してＣＰＵ４１の作業エリアとなるＲＡＭ４２と、各処理を実行するためのプログラムや縫製に関するデータ等が記憶されるＲＯＭ４３、を備えている。
ＲＯＭ４３には、当接部材３４が突部２６，２７，２８に当接した際に切り替えられる縫い形状又は被縫製物の送り方向に関する縫製データ４３ｄが突部２６，２７，２８毎に記憶されている。具体的には、鳩目縫いを行う場合には、鳩目縫いの環状部の縫い形状となるように縫製するための縫製データ（一針ごとの針落ち位置データ）と、鳩目縫いの直線部の縫い形状となるように縫製するための縫製データ（針振り幅、布送り量）とがどの突部２６，２７，２８に当接した際に切り替えられるかというテーブルが記憶されている。 (Control device)
The sewing machine 10 is provided with a control device 4 that controls the sewing.
As shown in FIG. 11, the control device 4 includes a CPU 41 that executes each process according to a processing program related to sewing and a program related to drive control of the spindle motor, etc., and a RAM 42 that develops each processing program and serves as a work area of the CPU 41. A ROM 43 that stores a program for executing each process, data related to sewing, and the like is provided.
In the ROM 43, sewing data 43 d relating to the sewing shape or the feed direction of the workpiece to be switched when the contact member 34 contacts the protrusions 26, 27, 28 is stored for each protrusion 26, 27, 28. Yes. Specifically, when performing eyelet stitching, sewing data (sewing drop position data for each stitch) for sewing so as to obtain the sewing shape of the annular portion of the eyelet stitch, and sewing of the straight portion of the eyelet stitch A table is stored as to which of the projections 26, 27, and 28 the sewing data (needle swing width, cloth feed amount) for sewing so as to have a shape can be switched.

ＲＯＭ４３には、当接部材３４が突部２６，２７，２８に当接したことを検出した際に、当接した突部２６，２７，２８に対応する縫製データに基づいて布の縫い形状又は布の送り方向を切り替える制御プログラム４３ｐが記憶されている。すなわち、ＣＰＵ４１が制御プログラム４３ｐを実行することにより制御装置４は制御手段として機能する。
スイッチ３に設けられている接点３２，３３は、制御装置４に電気的に接続されており、検出板３１が接点３２，３３に当接することにより、制御装置４に信号が送られ、当接部材３４の状態を検出することができるようになっている。
具体的には、制御プログラム４３ｐは、鳩目ボタン穴かがり縫い中に、スイッチ３が、突起２６又は突起２８が検出板３１に当接したことを検出した場合に、鳩目ボタン穴かがり縫いの送り方向を切り替える。また、制御プログラム４３ｐは、鳩目ボタン穴かがり縫い中に、スイッチ３が、突起２７が検出板３１に当接したことを検出した場合に、環状部と直線部の縫いを切り替える。 In the ROM 43, when it is detected that the abutting member 34 has abutted against the protrusions 26, 27, 28, the sewing shape of the cloth or based on the sewing data corresponding to the abutting protrusions 26, 27, 28 is detected. A control program 43p for switching the cloth feeding direction is stored. That is, when the CPU 41 executes the control program 43p, the control device 4 functions as a control unit.
The contacts 32 and 33 provided on the switch 3 are electrically connected to the control device 4, and a signal is sent to the control device 4 when the detection plate 31 contacts the contacts 32 and 33. The state of the member 34 can be detected.
Specifically, the control program 43p, when the switch 3 detects that the protrusion 26 or the protrusion 28 abuts the detection plate 31 during the eyelet buttonhole stitching, the feed direction of the eyelet buttonhole stitching Switch. Further, the control program 43p switches between the annular portion and the straight portion when the switch 3 detects that the protrusion 27 is in contact with the detection plate 31 during the eyelet buttonhole sewing.

＜鳩目縫い＞
次に、穴かがり縫いの一つである鳩目縫いの手順について説明する。ここでは、二つの突部２７，２８による検出結果を用いて鳩目縫いを行う場合と、三つの突部２６，２７，２８による検出結果を用いて鳩目縫いを行う場合とに分けて説明する。 <Eyelet stitch>
Next, a procedure for eyelet stitching, which is one type of hole stitching, will be described. Here, the case of performing eyelet stitching using the detection results of the two protrusions 27 and 28 and the case of performing eyelet stitching using the detection results of the three protrusions 26, 27, and 28 will be described separately.

（二つの突部の検出により鳩目縫いを行う方法）
図１２（ａ）に示すように、押さえ足部２２のボタン支持部２２ｅとボタン保持部２４のボタン支持部２４ｂとでボタンを挟持し、押さえ足部２２とプレート２３で布を挟み込み、縫製を開始する。そして、当接部材３４が突部２８に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、設定された針振り幅と布送り量を用いて直線部Ｄ１の縫製を行うように各部の動作を制御する。 (Method of performing eyelet stitching by detecting two protrusions)
As shown in FIG. 12A, the button is held between the button support portion 22e of the presser foot portion 22 and the button support portion 24b of the button holding portion 24, the cloth is held between the presser foot portion 22 and the plate 23, and sewing is performed. Start. Then, the abutting member 34 abuts on the protrusion 28 and the detecting plate 31 rotates, and the detecting plate 31 abuts on the contact 33, so that the control device 4 is included in the sewing data 43d stored in the ROM 43. Then, the operation of each part is controlled so that the linear part D1 is sewn using the set needle swing width and cloth feed amount.

そして、直線部Ｄ１の縫製中に当接部材３４が突部２７に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、一針ごとの針落ち位置データを用いて環状部Ｄ２の縫製を行うように各部の動作を制御する。
次いで、環状部Ｄ２の縫製中に当接部材３４が突部２７に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、設定された針振り幅と布送り量を用いて直線部Ｄ３の縫製を行うように各部の動作を制御する。 Then, during the sewing of the linear portion D1, the contact member 34 contacts the protrusion 27 and the detection plate 31 rotates, and the detection plate 31 contacts the contact 33, whereby the control device 4 stores in the ROM 43. Of the sewing data 43d, the operation of each part is controlled so as to sew the annular part D2 using the needle drop position data for each stitch.
Next, the abutting member 34 abuts on the protrusion 27 while the annular portion D2 is being sewn, and the detection plate 31 rotates. The detection plate 31 abuts on the contact 33, so that the control device 4 stores in the ROM 43. Of the set sewing data 43d, the operation of each part is controlled so as to sew the linear part D3 using the set needle swing width and cloth feed amount.

その後、直線部Ｄ３の縫製中に当接部材３４が突部２８に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、縫製を終了させる。
以上の手順で鳩目縫いを行う領域を三つに分割し、縫製の開始及び終了、各領域の縫製の切り替えを二つの突部２７，２８で検出して縫製を行うことにより、鳩目縫いが形成される。 Thereafter, during the sewing of the linear portion D3, the contact member 34 contacts the protrusion 28 and the detection plate 31 rotates, and the detection plate 31 contacts the contact 33, whereby the control device 4 finishes the sewing. Let
The eyelet stitch area is formed by dividing the area where eyelet stitching is performed in the above procedure into three parts, and detecting the start and end of sewing, and the change of sewing in each area by the two protrusions 27 and 28, and performing sewing. Is done.

（三つの突部の検出により鳩目縫いを行う方法）
図１２（ｂ）に示すように、押さえ足部２２のボタン支持部２２ｅとボタン保持部２４のボタン支持部２４ｂとでボタンを挟持し、押さえ足部２２とプレート２３で布を挟み込み、縫製を開始する。そして、当接部材３４が突部２８に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、設定された針振り幅と布送り量を用いて直線部Ｔ１の縫製を行うように各部の動作を制御する。
そして、直線部Ｔ１の縫製中に当接部材３４が突部２７に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、一針ごとの針落ち位置データを用いて曲線部Ｔ２の縫製を行うように各部の動作を制御する。 (Method of performing eyelet stitching by detecting three protrusions)
As shown in FIG. 12B, the button is held between the button support portion 22e of the presser foot portion 22 and the button support portion 24b of the button holding portion 24, and the cloth is held between the presser foot portion 22 and the plate 23 to perform sewing. Start. Then, the abutting member 34 abuts on the protrusion 28 and the detecting plate 31 rotates, and the detecting plate 31 abuts on the contact 33, so that the control device 4 is included in the sewing data 43d stored in the ROM 43. Then, the operation of each part is controlled so that the linear part T1 is sewn using the set needle swing width and cloth feed amount.
Then, during the sewing of the linear portion T1, the contact member 34 contacts the protrusion 27 and the detection plate 31 rotates, and the detection plate 31 contacts the contact 33, whereby the control device 4 stores in the ROM 43. Of the sewing data 43d, the operation of each portion is controlled so that the curved portion T2 is sewn using the needle drop position data for each stitch.

次いで、曲線部Ｔ２の縫製中に当接部材３４が突部２６に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、一針ごとの針落ち位置データを用いて半円状の環状部Ｔ３の縫製を行うように各部の動作を制御する。
次いで、環状部Ｔ３の縫製中に当接部材３４が突部２６に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、一針ごとの針落ち位置データを用いて曲線部Ｔ４の縫製を行うように各部の動作を制御する。 Next, during the sewing of the curved portion T2, the contact member 34 contacts the protrusion 26 and the detection plate 31 rotates, and the detection plate 31 contacts the contact 33, whereby the control device 4 stores in the ROM 43. Of the sewing data 43d, the operation of each part is controlled so as to sew the semicircular annular portion T3 using the needle drop position data for each stitch.
Next, during the sewing of the annular portion T3, the contact member 34 comes into contact with the projection 26 and the detection plate 31 rotates, and the detection plate 31 comes into contact with the contact 33, whereby the control device 4 stores in the ROM 43. Of the sewing data 43d, the operation of each portion is controlled so that the curved portion T4 is sewn using the needle drop position data for each stitch.

次いで、曲線部Ｔ４の縫製中に当接部材３４が突部２７に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、ＲＯＭ４３に記憶された縫製データ４３ｄのうち、設定された針振り幅と布送り量を用いて直線部Ｔ５の縫製を行うように各部の動作を制御する。 Next, during the sewing of the curved portion T4, the contact member 34 contacts the protrusion 27 and the detection plate 31 rotates, and the detection plate 31 contacts the contact 33, whereby the control device 4 stores in the ROM 43. Of the set sewing data 43d, the operation of each part is controlled so as to sew the linear part T5 using the set needle swing width and cloth feed amount.

その後、直線部Ｔ５の縫製中に当接部材３４が突部２８に当接して検出板３１が回動し、この検出板３１が接点３３に当接することにより、制御装置４は、縫製を終了させる。
以上の手順で鳩目縫いを行う領域を五つに分割し、縫製の開始及び終了、各領域の縫製の切り替えを三つの突部２６，２７，２８で検出して縫製を行うことにより、鳩目縫いが形成される。 Thereafter, during the sewing of the linear portion T5, the contact member 34 contacts the protrusion 28, and the detection plate 31 rotates. When the detection plate 31 contacts the contact 33, the control device 4 ends the sewing. Let
By dividing the area where eyelet stitching is performed in the above-described procedure into five parts and performing sewing by detecting the start and end of sewing and the switching of sewing in each area by the three protrusions 26, 27 and 28, the eyelet stitching is performed. Is formed.

＜作用効果＞
実施形態におけるミシン１０によれば、ボタン保持部２４と押さえ足部２２とでボタンを保持し、連結部２１に摺動自在に保持された押さえ足部２２とプレート２３で布を挟み込んで布を送りながら縫製を行うと、縫製動作に協働して押さえ足部２２及びボタン保持部２４も布の送り方向に移動する。押さえ足部２２及びボタン保持部２４が移動すると、押さえ足部２２に設けられた突部２６，２７や、ボタン保持部２４に設けられた突部２８も同方向に移動し、突部２６，２７，２８がスイッチ３の当接部材３４に当接すると、検出板３１が接点３３に当接して縫い形状又は布の送り方向の切り替えを行うタイミングを検出する。スイッチ３が、突部２６，２７，２８が当接部材３４に当接したことを検出すると、制御装置４は、ＲＯＭ４３に記憶された、当接した突部２６，２７，２８に対応する縫製データ４３ｄに基づいて布の縫い形状又は布の送り方向を切り替える。 <Effect>
According to the sewing machine 10 in the embodiment, the button is held by the button holding part 24 and the presser foot part 22, and the cloth is sandwiched between the presser foot part 22 and the plate 23 slidably held by the connecting part 21. When sewing is performed while feeding, the presser foot portion 22 and the button holding portion 24 also move in the cloth feeding direction in cooperation with the sewing operation. When the presser foot 22 and the button holding portion 24 move, the protrusions 26 and 27 provided on the presser foot 22 and the protrusion 28 provided on the button holding portion 24 also move in the same direction. When 27 and 28 come into contact with the contact member 34 of the switch 3, the detection plate 31 comes into contact with the contact 33 and detects the timing at which the sewing shape or the cloth feed direction is switched. When the switch 3 detects that the protrusions 26, 27, and 28 are in contact with the contact member 34, the control device 4 performs the sewing corresponding to the contact protrusions 26, 27, and 28 stored in the ROM 43. Based on the data 43d, the sewing shape of the cloth or the feeding direction of the cloth is switched.

これにより、縫い形状又は送り方向の切り替えの検出は、スイッチ３とボタン保持部２４及び押さえ足部２２とに設けられた突部２６，２７，２８との当接により検出されるので、光電センサのように光路上への埃等の堆積による未検出といった問題を解消することができる。
また、スイッチ３はボタン保持部２４の側方から外部に露出するように設けられた突部２６，２７，２８に当接するように構成されているので、押さえ足部２２やプレート２３周辺の機構を簡単にすることができ、メンテナンスを容易に行うことができる。また、少なくとも三つ以上の被当接部２６，２７，２８を設けてスイッチ３で検出することができるので、鳩目縫いにおける送り方向や環状部と直線部の切り替えにも対応することができ、さらには縫い形状を美しくすることができて、縫製品質の低下を防止することができる。また、スイッチ３は当接部材３４が検出板３１に当接することにより機械的に検出することができるので、構造が簡単で比較的安価なスイッチを用いることができ、コストダウンに寄与することができる。 Thereby, the detection of the change of the sewing shape or the feeding direction is detected by the contact between the switch 3 and the protrusions 26, 27, 28 provided on the button holding part 24 and the presser foot part 22, so that the photoelectric sensor As described above, it is possible to solve the problem of non-detection due to accumulation of dust or the like on the optical path.
Further, since the switch 3 is configured to come into contact with the protrusions 26, 27, 28 provided to be exposed to the outside from the side of the button holding portion 24, the mechanism around the presser foot portion 22 and the plate 23 is provided. Can be simplified and maintenance can be easily performed. Further, since at least three or more contacted portions 26, 27, and 28 can be provided and detected by the switch 3, it is possible to cope with the feeding direction and the switching between the annular portion and the straight portion in the eyelet stitching, Furthermore, the sewing shape can be made beautiful, and deterioration of the quality of the sewing product can be prevented. Further, since the switch 3 can be mechanically detected by the contact member 34 contacting the detection plate 31, a switch having a simple structure and relatively inexpensive can be used, which contributes to cost reduction. it can.

また、スイッチ３は、突部２６，２７，２８への当接の有無だけでなく、押さえ足部２２が未装着であることも検出できるので、押さえ足部２２の装着の確認をスイッチ３で行うことができる。 Further, since the switch 3 can detect not only the presence or absence of contact with the protrusions 26, 27, and 28 but also that the presser foot portion 22 is not attached, the switch 3 can be used to check whether the presser foot portion 22 is attached. It can be carried out.

＜その他＞
なお、本発明の範囲は上記実施形態に限られるものではない。例えば、突部２６，２７，２８に代えて光を反射する反射板を設けるとともに、スイッチ３に代えて縫製動作中におけるボタン保持部の移動時に、対向するボタン保持部に向けて発光する発光部と、発光部から発光された光が反射板に当たって反射された光を受光する受光部と、を有する検出手段としてのセンサを設ける。そして、発光部から発光された光を受光部が受光したときに切り替えられる縫い形状又は送り方向に関する縫製データを反射板毎にＲＯＭに記憶させ、発光部から発光された光を受光部が受光した際に、制御装置により、発光部からの光を反射した反射板に対応する縫製データに基づいて、鳩目ボタン穴かがり縫い中に、前位置又は後位置の反射板を検出したときに鳩目ボタン穴かがり縫いの送り方向を切り替えるとともに、境界位置の反射板を検出したときに環状部と直線部の縫いを切り替えるように構成してもよい。 <Others>
The scope of the present invention is not limited to the above embodiment. For example, a reflecting plate that reflects light is provided in place of the protrusions 26, 27, and 28, and a light emitting unit that emits light toward the opposing button holding unit when the button holding unit is moved during the sewing operation instead of the switch 3. And a light-receiving unit that receives the light reflected from the light emitted from the light-emitting unit when it hits the reflection plate. Then, sewing data relating to the sewing shape or feed direction that is switched when the light receiving unit receives the light emitted from the light emitting unit is stored in the ROM for each reflection plate, and the light receiving unit receives the light emitted from the light emitting unit. In this case, when the control device detects the front or rear position reflector during the eyelet buttonhole sewing based on the sewing data corresponding to the reflector reflecting the light from the light emitting unit, the eyelet buttonhole The feed direction of the overlock stitching may be switched, and the stitching between the annular portion and the straight portion may be switched when the reflecting plate at the boundary position is detected.

このような構成とすることで、鳩目ボタン穴かがり縫いの送り方向の切り替えや環状部と直線部の縫いの切り替えは、発光部及び受光部と押さえ足部及びボタン保持部に設けられた反射板とによって検出されるので、発光部及び受光部と押さえ足部及びボタン保持部とを接触させることなく押さえ足部が所定位置に到達したことを検出することができる。なお、縫い形状又は被縫製物の送り方向の切り替えタイミングの検出に光を利用することにより光路上への埃等の堆積による問題が考えられるが、反射板は露出するように設けられているため、埃等の除去を容易に行うことができ、メンテナンスを容易に行うことができる。また、押さえ足部及び少なくとも三つ以上の反射板を設けて発光部及び受光部で検出することができるので、鳩目縫いのように縫い形状又は被縫製物の送り方向の切り替えにも対応することができ、縫製品質の低下を防止することができる。 By adopting such a configuration, the reflection plate provided in the light emitting part, the light receiving part, the presser foot part, and the button holding part is used for switching the feeding direction of the eyelet buttonhole stitching and switching the sewing of the annular part and the linear part. Therefore, it is possible to detect that the presser foot has reached a predetermined position without bringing the light emitting unit, the light receiving unit, the presser foot unit, and the button holding unit into contact with each other. In addition, there may be a problem due to accumulation of dust or the like on the optical path by using light to detect the timing for switching the sewing shape or the feed direction of the workpiece, but the reflector is provided so as to be exposed. In addition, dust and the like can be easily removed, and maintenance can be easily performed. Also, since the presser foot and at least three or more reflectors can be provided and detected by the light emitting part and the light receiving part, it is possible to cope with switching of the sewing shape or the feed direction of the sewing product as in the case of eyelet stitching. It is possible to prevent deterioration of the quality of the sewing product.

また、突部の数を増やすことにより、縫い形状の切り替えを詳細に設定することもできるので、より美しい縫い目の形成や複雑な縫い形状の実現が可能である。
その他、発明の範囲内において、自由に設計変更が可能である。 In addition, by changing the number of protrusions, it is possible to set the switching of the sewing shape in detail, so that it is possible to form a more beautiful seam and to realize a complicated sewing shape.
In addition, the design can be freely changed within the scope of the invention.

ミシンの概略図。Schematic of a sewing machine. ボタン穴かがり押さえの平面図。The top view of a buttonhole presser. 連結部の平面図。The top view of a connection part. 押さえ足部の平面図。The top view of a holding foot part. プレートの平面図。The top view of a plate. （ａ）はボタン保持部の平面図、（ｂ）はボタン保持部の側面図。(A) is a top view of a button holding part, (b) is a side view of a button holding part. カバー部材の平面図。The top view of a cover member. （ａ）はボタン穴かがり押さえが未装着の場合における当接部材の位置を示す図、（ｂ）は（ａ）の状態におけるスイッチの状態を示す図。(A) is a figure which shows the position of the contact member in case the buttonhole guard is not mounted | worn, (b) is a figure which shows the state of the switch in the state of (a). （ａ）は当接部材が突部に当接していない場合における当接部材の位置を示す図、（ｂ）は（ａ）の状態におけるスイッチの状態を示す図。(A) is a figure which shows the position of the contact member in case the contact member does not contact | abut to a protrusion, (b) is a figure which shows the state of the switch in the state of (a). （ａ）は当接部材が突部に当接している場合における当接部材の位置を示す図、（ｂ）は（ａ）の状態におけるスイッチの状態を示す図。(A) is a figure which shows the position of the contact member in case the contact member is contacting the protrusion, (b) is a figure which shows the state of the switch in the state of (a). 制御装置の構成を示すブロック図。The block diagram which shows the structure of a control apparatus. （ａ）は二つの突部を検出して行う鳩目縫いの手順を示す図、（ｂ）は三つの突部を検出して行う鳩目縫いの手順を示す図。(A) is a figure which shows the procedure of the eyelet stitch performed by detecting two protrusions, (b) is the figure which shows the procedure of the eyelet stitch performed by detecting three protrusions. 従来技術におけるボタン穴かがり押さえの平面図。The top view of the buttonhole guard in a prior art. （ａ）は従来技術における正送りから逆送りへの切り替えを示す図、（ｂ）は従来技術における逆送りから正送りへの切り替えを示す図。(A) is a figure which shows the switching from the forward feed in a prior art to a reverse feed, (b) is a figure which shows the switching from the reverse feed in a prior art to a normal feed. 従来技術における鳩目縫いの手順を示す図。The figure which shows the procedure of the eyelet stitch in a prior art. 従来技術における鳩目縫いの手順を示す図。The figure which shows the procedure of the eyelet stitch in a prior art.

Explanation of symbols

１押さえ棒
２ボタン穴かがり押さえ
３スイッチ（検出手段）
４制御装置
２１連結部
２２押さえ足部
２３プレート
２４ボタン保持部
２６突部（被当接部）
２７突部（被当接部）
２８突部（被当接部）
４３ＲＯＭ 1 Presser bar 2 Buttonhole presser 3 Switch (detection means)
4 Control Device 21 Connecting Portion 22 Pressing Foot 23 Plate 24 Button Holding Portion 26 Protruding Portion (Contacted Portion)
27 Protruding part (contacted part)
28 Protruding part (contacted part)
43 ROM

Claims

A connecting part attached to a presser holder provided at the lower end of the presser bar of the sewing machine;
A presser foot that is slidably held by the connecting portion and holds the sewing product while moving along with the cloth feed of the sewing product during a sewing operation;
A button holding part that is slidably held by the presser foot part, holds a button with the presser foot part, and moves in the feed direction of the sewing product while holding the button in cooperation with the presser foot part. When,
Provided on the presser foot and the button holding part, and exposed to the outside so as to indicate the front and rear positions of the buttonhole over stitching and the boundary position between the annular portion and the straight portion of the eyelet stitching. A contacted portion provided as a
Buttonhole presser with
When the buttonhole presser provided on the lower end of the presser bar is moved during the sewing operation, it is brought into contact with each contacted part at a predetermined position so that each contacted part is With detection means to detect,
During eyelet buttonhole stitching, the feed direction of the eyelet buttonhole stitching is switched when the abutted portion at the front position or the rear position is detected, and the ring portion when the abutted portion at the boundary position is detected A sewing machine characterized by switching the sewing of a straight portion.

The detection means includes
It is possible to detect a first state in which the presser foot portion is not attached, a second state in which the presser foot portion is not in contact with the contacted portion, and a third state in which the presser foot portion is in contact with the contacted portion. The sewing machine according to claim 1, wherein the sewing machine is provided.

A connecting part attached to a presser holder provided at the lower end of the presser bar of the sewing machine;
A presser foot that is slidably held by the connecting portion and holds the sewing product while moving along with the cloth feed of the sewing product during a sewing operation;
A button holding part that is slidably held by the presser foot part, holds a button with the presser foot part, and moves in the feed direction of the sewing product while holding the button in cooperation with the presser foot part. When,
Provided on the presser foot and the button holding part, and exposed to the outside so as to indicate the front and rear positions of the buttonhole over stitching and the boundary position between the annular portion and the straight portion of the eyelet stitching. And a reflector provided
Buttonhole presser with
A light-emitting unit that is provided in a sewing machine body and emits light toward a reflecting plate facing at a predetermined position when the buttonhole presser provided at the lower end of the presser bar is moving during a sewing operation;
A light receiving unit that is provided in a sewing machine body and receives light reflected by the light emitted from the light emitting unit hitting the reflecting plate;
With detection means comprising
When the reflected light from the reflector at the front or rear position is detected during eyelet buttonhole sewing, the feeding direction of the eyelet buttonhole sewing is switched and the reflected light from the reflector at the boundary position is detected The sewing machine is characterized in that the sewing is switched between the annular portion and the straight portion.