JPH1119372A - Sewing machine - Google Patents
Sewing machineInfo
- Publication number
- JPH1119372A JPH1119372A JP19646397A JP19646397A JPH1119372A JP H1119372 A JPH1119372 A JP H1119372A JP 19646397 A JP19646397 A JP 19646397A JP 19646397 A JP19646397 A JP 19646397A JP H1119372 A JPH1119372 A JP H1119372A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- sewing machine
- sewing
- balance
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば布等の縫製
対象物に糸による縫い目を形成するようにした縫製機ま
たは刺繍機等のミシンに関し、特に、ミシン針に対して
上糸等を自動的に糸通しできるようにしたミシンに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine such as a sewing machine or an embroidery machine which forms a seam with a thread on a sewing object such as a cloth. The present invention relates to a sewing machine that can be threaded in a targeted manner.
【0002】[0002]
【従来の技術】一般に、ミシン本体と、該ミシン本体に
設けられミシン針を往復動させつつ、天秤を揺動させる
ヘッド部と、該ヘッド部上に設けられ、複数の上糸をそ
れぞれ個別に収納する糸収納部とからなり、該糸収納部
の各上糸に対応して前記ヘッド部の下端側には複数本の
ミシン針を設け、該各ミシン針に対して糸収納部からの
各糸を予め個別に挿通(糸通し)した状態で、該各ミシ
ン針のうちいずれか一のミシン針を針選択機構により選
択的に駆動するようにした縫製機または刺繍機等のミシ
ンは知られている。2. Description of the Related Art Generally, a sewing machine main body, a head portion provided on the sewing machine main body for reciprocating a sewing needle and swinging a balance, and a plurality of upper threads provided on the head portion to individually separate a plurality of upper threads, respectively. A plurality of sewing needles are provided at the lower end side of the head section corresponding to each upper thread of the thread storage section, and each of the sewing needles is provided from the thread storage section. There is known a sewing machine such as a sewing machine or an embroidery machine in which any one of the sewing needles is selectively driven by a needle selection mechanism in a state where the threads are individually inserted (threaded) in advance. ing.
【0003】そして、この種の従来技術によるミシンで
は、前記ヘッド部の下端側に設けた複数本のミシン針に
対して、前記糸収納部からの各糸を予め手動操作等によ
って個別に糸通する。次に、この状態で各ミシン針のう
ちいずれか一のミシン針を針選択機構で選択しつつ、選
択したミシン針をヘッド部で運針させることにより布等
に縫製を施すようにしている。[0003] In this type of conventional sewing machine, each thread from the thread storage section is individually passed through a plurality of sewing needles provided at the lower end side of the head section by manual operation or the like in advance. I do. Next, in this state, while selecting one of the sewing needles by the needle selection mechanism, the selected sewing needle is moved by the head portion to sew the cloth or the like.
【0004】この場合、前記糸収納部には複数本の上糸
用ボビンが回転可能に配設され、該各ボビンには互いに
種類の異なる上糸がそれぞれ巻回されると共に、使用頻
度の高い上糸が2〜3本程度のボビンに巻回され、これ
らの各ボビンが前記糸収納部内に収められている。そし
て、前記針選択機構でミシン針の選択を行ったときに
は、これらの各ボビンから上糸が個別に繰り出され、前
記布等に対して縫製による縫い目を形成することにな
る。In this case, a plurality of upper thread bobbins are rotatably disposed in the thread storage section, and different types of upper threads are wound around each of the bobbins, and are frequently used. The upper thread is wound around two or three bobbins, and each of these bobbins is accommodated in the thread storage section. Then, when the sewing machine needle is selected by the needle selecting mechanism, the upper thread is individually paid out from each of these bobbins, and a stitch is formed on the cloth or the like by sewing.
【0005】[0005]
【発明が解決しようとする課題】ところで、上述した従
来技術にあっては、ミシン本体のヘッド部に複数のミシ
ン針を設け、該各ミシン針に対して糸収納部からの各糸
を予め手動等で個別に糸通しを行った後に、縫製作業に
先立って各ミシン針のいずれかを針選択機構で選択する
構成としているから、ヘッド部全体が大型化するばかり
でなく、ヘッド部に設けた複数本のミシン針には予め特
定の上糸をそれぞれ手作業で挿通しておく必要があり、
縫製作業または刺繍作業等を自動化する上で大きな障害
になるという問題がある。In the prior art described above, a plurality of sewing needles are provided on a head portion of a sewing machine main body, and each of the sewing machine needles is manually operated in advance. After the individual threading is performed by, for example, one of the sewing needles is selected by the needle selection mechanism prior to the sewing operation, so that not only is the entire head portion large, but also the head portion is provided. It is necessary to manually insert a specific upper thread into each of a plurality of sewing needles in advance,
There is a problem that it becomes a major obstacle in automating a sewing operation or an embroidery operation.
【0006】また、例えば特開昭61−89365号公
報、特開平6−154453号公報、特開平6−182
077号公報および特開平7−671号公報等に記載さ
れたミシン(以下、他の従来技術という)では、例えば
ヘッド部に設けた1本のミシン針に対して複数の糸のい
ずれかを選択的に挿通できるようにし、ヘッド部全体の
小型化を図るようにする提案がなされている。For example, Japanese Patent Application Laid-Open Nos. 61-89365, 6-154453, and 6-182
In a sewing machine described in Japanese Patent Application Laid-Open No. 077 and Japanese Patent Application Laid-Open No. 7-671 (hereinafter referred to as another conventional technique), for example, one of a plurality of threads is selected for one sewing needle provided in a head portion. It has been proposed that the head portion can be inserted through the head portion in a compact size.
【0007】しかし、このような他の従来技術にあって
は、ミシン針の近傍位置に自動糸通し用のアーム部材等
を設ける構成としているため、例えばミシンを作動させ
て縫製作業(ミシン作業)を行うときに、アーム部材等
が邪魔になってミシン針周囲の視界が制限され、ミシン
針による縫い目の形状等が見づらくなるという問題があ
る。However, in such another conventional technique, since an arm member or the like for automatic threading is provided at a position near the sewing needle, for example, a sewing operation is performed by operating the sewing machine (sewing operation). When performing the above, there is a problem that the field of view around the sewing needle is restricted due to the arm member or the like obstructing, making it difficult to see the shape of the seam formed by the sewing needle.
【0008】また、ミシン作業の途中で糸切れ等が発生
したときの対策が必ずしも十分ではなく、糸切れの検知
を高精度に安定して行うのが難しいという問題がある。In addition, there is a problem that it is not always sufficient to take measures when a thread break or the like occurs during the sewing operation, and it is difficult to detect a thread break with high accuracy and stability.
【0009】本発明は上述した従来技術の問題に鑑みな
されたもので、本発明はミシン針への自動糸通し後にミ
シン針周囲の視界を広くすることができ、例えば作成途
中の刺繍柄等を容易に確認できると共に、刺繍柄等の作
成作業(ミシン作業)を円滑に行うことができるように
したミシンを提供することを目的としている。The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can increase the field of view around the sewing machine needle after automatic threading of the sewing machine needle. An object of the present invention is to provide a sewing machine that can be easily checked and that can perform an operation of creating an embroidery pattern or the like (a sewing operation) smoothly.
【0010】また、本発明の他の目的は、ミシン作業の
途中で糸切れ等が発生しても、糸切れの検知を高精度に
安定して行うことができ、糸切れセンサ等をコンパクト
に配設できるようにしたミシンを提供することにある。Another object of the present invention is to enable the detection of a thread break to be performed with high accuracy and stability even if a thread break occurs during the sewing operation, and to make the thread break sensor and the like compact. An object of the present invention is to provide a sewing machine that can be arranged.
【0011】[0011]
【課題を解決するための手段】上述した課題を解決する
ために、請求項1の発明は、ミシンの基台と、基端側が
該基台上に設置され、先端側が該基台上を延在して当該
先端側に往復動するミシン針と揺動する天秤とが設けら
れたヘッド部と、前記天秤に対して糸を挿通するため該
ヘッド部の先端側に設けられた天秤用糸道形成部と、該
天秤用糸道形成部から導かれる糸を前記ミシン針に対し
て挿通するためのミシン針用糸道形成部と、該ミシン針
用糸道形成部を前記ヘッド部の先端側に回動可能に連結
し、前記ミシン針への糸通し時には該ミシン針用糸道形
成部を前記ミシン針側に進出させ、糸通し後には該ミシ
ン針用糸道形成部を前記ヘッド部の基端側方向へと退避
させる進退機構とからなる構成を採用している。In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a sewing machine base, a base end side of which is installed on the base, and a tip end side of which extends on the base. A head portion provided with a sewing needle reciprocating at the distal end and a swinging balance, and a thread path for a balance provided at the distal end side of the head portion for inserting a thread into the balance. A forming section, a thread path forming section for a sewing machine needle for inserting a thread guided from the thread path forming section for a balance into the sewing needle, and a thread path forming section for the sewing machine needle at a tip end side of the head section. When the thread is passed through the sewing machine needle, the sewing machine thread path forming portion is advanced toward the sewing machine needle, and after the threading, the sewing machine needle thread path forming portion is connected to the head portion. A structure including an advancing / retracting mechanism for retracting in the proximal direction is employed.
【0012】上記構成によれば、ミシン針への糸通し時
に進退機構でミシン針用糸道形成部を前記ミシン針側に
進出させることにより、前記ミシン針用糸道形成部を用
いてミシン針への糸通し作業を円滑に行うことができ
る。そして、ミシン針への糸通し後には前記進退機構で
ミシン針用糸道形成部をヘッド部の基端側(ミシンの後
側)へと退避させることができ、ミシン作業時にオペレ
ータ等はミシンの前側からミシン針による縫製対象物
(例えば布)上の縫い目等を広い視界をもっ確認でき
る。According to the above construction, when the thread is passed through the sewing machine needle, the sewing machine needle thread path forming section is advanced toward the sewing machine needle side by the advance / retreat mechanism, so that the sewing machine needle is formed using the sewing machine needle thread path forming section. Threading work can be performed smoothly. After threading the sewing machine needle, the advance / retreat mechanism can retract the sewing machine thread path forming portion to the base end side of the head portion (rear side of the sewing machine). From the front side, a seam or the like on a sewing object (for example, cloth) by a sewing needle can be confirmed with a wide field of view.
【0013】また、請求項2の発明では、前記ミシン針
によるミシン作業時に前記基台との間で縫製対象物を保
持する布押え具を備え、前記進退機構は該布押え具を前
記ミシン針用糸道形成部と共に回動させ、該ミシン針用
糸道形成部がミシン針側から退避するときに前記布押え
具を縫製対象物の保持位置に進出させる構成としてい
る。Further, in the invention according to the second aspect, the sewing machine further includes a cloth presser for holding a sewing target object between the sewing machine and the base during the sewing operation by the sewing machine needle, and the advance / retreat mechanism moves the cloth presser to the sewing machine needle. The sewing machine is configured to be rotated together with the thread path forming section and to advance the cloth presser to the holding position of the sewing target when the thread path forming section for the sewing machine retracts from the sewing needle side.
【0014】これにより、ミシン針への糸通し後にミシ
ン針用糸道形成部をミシン針側から退避させるときに、
進退機構で布押え具を縫製対象物の保持位置に進出させ
ることができ、ミシン作業時には布押え具により縫製対
象物(布)を基台との間で安定して保持できる。Thus, when the thread path forming portion for the sewing machine needle is retracted from the sewing machine needle side after the threading to the sewing machine needle,
The cloth presser can be advanced to the holding position of the sewing object by the reciprocating mechanism, and the sewing object (cloth) can be stably held between the base and the base by the cloth presser during the sewing operation.
【0015】さらに、請求項3の発明では、前記布押え
具は、前記ヘッド部の先端側に回動可能に取付けられ前
記進退機構により回動される取付ブラケットと、該取付
ブラケットに回動可能に取付けられたホルダと、該ホル
ダに対して上下動可能に設けられた布押え用のプレッサ
と、該プレッサを上下動させるため前記ホルダに設けら
れたアクチュエータとからなり、前記縫製対象物の交換
時には前記プレッサをホルダと共に上向きに回動させる
構成としている。Further, in the invention according to claim 3, the cloth presser is rotatably mounted on a tip end side of the head portion and is rotatable by the advance / retreat mechanism. , A presser for the cloth presser provided movably up and down with respect to the holder, and an actuator provided at the holder to move the presser up and down, for exchanging the sewing object. Sometimes, the presser is configured to rotate upward together with the holder.
【0016】これにより、ミシン作業時にミシン針の往
復動に連動させてプレッサを上下動させ、該プレッサが
布上に持上げられたときに布送りを行うことができる。
そして、縫製対象の布を交換するときには、布押え具の
取付ブラケットに対してホルダを回動すれば、該ホルダ
と共にプレッサを上向きに回動でき、該プレッサを布か
ら大きく離間させた状態で布の交換を容易に行うことが
できる。Thus, the presser can be moved up and down in conjunction with the reciprocating movement of the sewing needle during the sewing operation, and the cloth can be fed when the presser is lifted on the cloth.
Then, when replacing the cloth to be sewn, if the holder is rotated with respect to the mounting bracket of the cloth presser, the presser can be rotated upward together with the holder, and the presser is largely separated from the cloth. Can be easily exchanged.
【0017】一方、請求項4の発明では、前記ヘッド部
の先端側に、前記ミシン針への糸通し後に糸のたるみを
吸収するため前記天秤用糸道形成部の途中位置で前記天
秤に対して接近,離間する糸さばきレバーを設け、該糸
さばきレバーの先端側には、前記天秤への糸通し時に該
天秤に隣接した位置で糸が挿通され、ミシン作業時には
前記天秤から離間した位置で糸の動きに追従して撓み変
形する糸取りばねを設ける構成としている。On the other hand, in the invention according to the fourth aspect, in order to absorb the slack of the thread after passing the thread through the sewing machine needle, the tip of the head portion is positioned with respect to the balance at an intermediate position of the thread path forming portion for the balance. A thread separating lever which approaches and separates the thread at a position adjacent to the balance at the time of threading the balance at the tip side of the thread separating lever, and at a position separated from the balance during sewing operation. A yarn take-up spring that bends and deforms following the movement of the yarn is provided.
【0018】この場合には、天秤への糸通し時に糸さば
きレバーを天秤に接近させ、天秤と共に糸取りばねにも
自動的に糸通しを行う。また、ミシン針への糸通し後に
糸さばきレバーを天秤から離間させたときには、該天秤
と糸取りばねとの間で糸が引張られることにより、例え
ば天秤からミシン針へと延びた糸のたるみを自動的に吸
収できる。そして、この状態でミシン作業を開始したと
きには天秤が上,下に揺動するに応じて糸に引張り力が
与えられ、このときの糸の動きに追従して糸取りばねを
撓み変形させることができ、変形量に応じた糸張力を発
生できる。In this case, the thread separating lever is brought close to the balance when threading the thread to the balance, and the thread is automatically threaded to the thread take-up spring together with the balance. In addition, when the thread separating lever is separated from the balance after threading the sewing machine needle, the thread is pulled between the balance and the thread take-up spring, so that, for example, the slack of the thread extending from the balance to the sewing needle is automatically adjusted. Can be absorbed. Then, when the sewing machine operation is started in this state, a tensile force is applied to the thread as the balance swings up and down, and the thread take-up spring can be deformed by following the movement of the thread at this time. In addition, it is possible to generate a yarn tension according to the deformation amount.
【0019】また、請求項5の発明では、前記ヘッド部
の先端側に、前記ミシン針への糸通し後に前記糸さばき
レバーを天秤から離間した位置に停止させるためのスト
ッパと、ミシン作業時に前記糸取りばねが接触,離間す
る導電性のばね受とを設け、該ばね受は前記糸取りばね
が接触,離間する毎にスイッチング動作する糸切れセン
サを前記糸取りばねと共に構成するようにしている。Further, in the invention according to claim 5, a stopper for stopping the thread separating lever at a position separated from the balance after threading the sewing machine needle is provided on the tip end side of the head section, A conductive spring receiver is provided for the thread take-up spring to contact and separate, and the spring receiver constitutes a thread break sensor that performs a switching operation each time the thread take-up spring contacts and separates, together with the thread take-up spring.
【0020】これにより、ミシン針への糸通し後には糸
さばきレバーをストッパに当接する位置まで回動させ、
天秤と糸取りばねとの間で糸に引張り力を付与すること
ができ、この状態でミシン作業を開始したときには天秤
の揺動に応じて糸を引張ることにより、糸取りばねを撓
み変形させつつばね受に接離可能に当接させ、スイッチ
ング動作を繰返すことができる。そして、ミシン作業の
途中で糸切れが発生すると、天秤の揺動に応じた糸の動
きが止まり、糸取りばねの撓み変形が中断されるので、
糸取りばねがばね受に接触し続けるようになり、前記ス
イッチング動作の停止によって糸切れを検知することが
できる。Thus, after threading the sewing machine needle, the thread separating lever is rotated to a position where it comes into contact with the stopper,
A tensile force can be applied to the thread between the balance and the thread take-up spring. When the sewing machine starts working in this state, the thread is pulled in accordance with the swing of the balance, so that the thread take-up spring is deformed and deformed. And the switching operation can be repeated. If the thread breaks during the sewing operation, the movement of the thread according to the swing of the balance stops, and the bending deformation of the thread take-up spring is interrupted.
The thread take-up spring keeps in contact with the spring receiver, and it is possible to detect a thread break by stopping the switching operation.
【0021】[0021]
【発明の実施の形態】以下、本発明によるミシンの実施
の形態を、添付図面を参照しつつ詳細に説明する。Embodiments of a sewing machine according to the present invention will be described below in detail with reference to the accompanying drawings.
【0022】ここで、図1ないし図14は本発明の実施
例によるミシンを刺繍機に適用した場合を示している。FIGS. 1 to 14 show a case where the sewing machine according to the embodiment of the present invention is applied to an embroidery machine.
【0023】図において、1は刺繍機の本体部を構成す
るミシン本体で、該ミシン本体1は図1に示すように、
ミシンの基台2と、該基台2上に設けられたヘッド部3
とから構成されている。そして、該ヘッド部3は基端側
が固定端3Aとなって基台2上に設置され、先端側がヘ
ッド端部3Bとなって基台2上の刺繍枠(図示せず)と
上,下で対向する構成となっている。In FIG. 1, reference numeral 1 denotes a sewing machine main body which constitutes a main body of the embroidery machine. As shown in FIG.
A base 2 of the sewing machine, and a head 3 provided on the base 2
It is composed of The head portion 3 is installed on the base 2 with the base end side as the fixed end 3A, and the head end portion 3B as the head end portion 3B with an embroidery frame (not shown) on the base 2 above and below. It has a configuration that faces each other.
【0024】ここで、ヘッド部3内には主軸モータで駆
動される主軸(いずれも図示せず)と該主軸の回転を
上,下の往復運動に変換する駆動部(図示せず)が設け
られ、この駆動部は後述の天秤7を上,下に揺動させる
と共に、ヘッド部3の下端側から基台2側に向けて図5
に示す如く突出した針軸4およびミシン針5を上,下に
往復動させるものである。なお、横振りミシンの場合に
は、ミシン針5が針軸4と共に後述するプレッサ43の
針穴43Bに沿って揺動し、縫い目に振り幅を与える構
成となっている。また、基台2側にはミシン針5の先端
と対向する位置に針板6、下糸が巻回された下糸ボビ
ン、刺繍枠原点センサおよび枠限センサ(いずれも図示
せず)等が配設されている。Here, a main shaft (both not shown) driven by a main shaft motor and a drive unit (not shown) for converting the rotation of the main shaft into a reciprocating up and down motion are provided in the head unit 3. The drive unit swings a balance 7 described later up and down, and moves the balance 7 from the lower end side of the head unit 3 to the base 2 side as shown in FIG.
The needle shaft 4 and the sewing machine needle 5 which protrude as shown in FIG. In the case of the horizontal swing sewing machine, the sewing needle 5 swings along with the needle shaft 4 along a needle hole 43B of a presser 43 described later to give a swing width to a seam. Further, on the base 2 side, a needle plate 6, a bobbin bobbin wound with a bobbin thread, an embroidery frame origin sensor, a frame limit sensor (all not shown), and the like are provided at a position facing the tip of the sewing needle 5. It is arranged.
【0025】7はヘッド部3のヘッド端部3Bに設けら
れた天秤で、該天秤7は図3に示す如く、ヘッド端部3
B内から後述の天秤用糸道形成部9側に向けて突出し、
前記駆動部によりミシン針5とほぼ同期して上,下に揺
動される構成となっている。そして、天秤7は下向きに
揺動するときに、ミシン針5との間で上糸Sに僅かなた
るみを与え、この上糸Sがミシン針5側に給糸されるの
を許す。また、天秤7は上向きに揺動されるときに、ミ
シン針5により刺繍布上に形成した縫い目(いずれも図
示せず)から上糸Sを引っ張り上げるようにして該上糸
Sに後述の接点ばね60等を介した張力を与え、前記縫
い目の糸締めと上糸Sの繰り出しとを行うようになって
いる。Numeral 7 denotes a balance provided at the head end 3B of the head section 3. The balance 7 is, as shown in FIG.
Projecting from inside B toward the balance thread path forming section 9 described below,
The drive unit swings up and down substantially in synchronization with the sewing machine needle 5. When the balance 7 swings downward, the balance 7 gives the upper thread S a slight slack with the sewing machine needle 5, and allows the upper thread S to be supplied to the sewing machine needle 5 side. Further, when the balance 7 is swung upward, the upper thread S is pulled up from a seam (both not shown) formed on the embroidery cloth by the sewing machine needle 5 so that the upper thread S A tension is applied through a spring 60 or the like to perform the thread tightening of the seam and the feeding of the upper thread S.
【0026】8はヘッド部3のヘッド端部3B側に設け
られた糸道形成機構で、該糸道形成機構8は図1ないし
図5に示す如く天秤用糸道形成部9、後述の中継糸道形
成部15およびミシン針用糸道形成部22等により構成
されている。そして、天秤用糸道形成部9は図3および
図9に示すように、ヘッド端部3Bに固定して設けられ
た平板状の固定板10と、該固定板10に対しガイド等
を介して衝合、離間可能に配設された平板状の可動板1
1とからなり、該可動板11と固定板10との衝合面間
には糸道としての天秤用糸道12が形成されている。Reference numeral 8 denotes a thread path forming mechanism provided on the head end 3B side of the head section 3. The thread path forming mechanism 8 includes a thread path forming section 9 for a balance as shown in FIGS. It is constituted by a thread path forming section 15 and a thread path forming section 22 for a sewing needle. As shown in FIGS. 3 and 9, the thread path forming section 9 for the balance is provided with a flat fixing plate 10 fixed to the head end 3B and a guide or the like with respect to the fixing plate 10. Flat movable plate 1 arranged to be able to abut and separate
1 is formed between the abutting surfaces of the movable plate 11 and the fixed plate 10.
【0027】ここで、該天秤用糸道12は固定板10と
可動板11との衝合面に、例えば半円形状または断面U
字状の凹溝をそれぞれ刻設することにより天秤7等の
前,後に亘って曲線状または直線状に延びる細溝として
形成されている。そして、天秤用糸道12は図5に示す
如く、天秤7の糸穴7A(図9参照)を前,後で挟む第
1,第2の糸道部12A,12Bからなり、第1の糸道
部12Aは後述する糸ガイド46の位置から下向きに延
び、一定の曲率をもって略L字状に屈曲すると共に、天
秤7の位置に向けて直線状に延びている。Here, the thread path 12 for the balance is formed on the abutting surface between the fixed plate 10 and the movable plate 11 by, for example, a semicircular shape or a cross section U.
By engraving the U-shaped concave grooves respectively, the concave grooves are formed as narrow grooves extending in a curved or straight line before and after the balance 7 or the like. As shown in FIG. 5, the balance thread path 12 includes first and second thread paths 12A and 12B sandwiching a thread hole 7A (see FIG. 9) of the balance 7 before and after. The path portion 12A extends downward from a position of a thread guide 46, which will be described later, and is bent in a substantially L shape with a constant curvature, and linearly extends toward the position of the balance 7.
【0028】また、第2の糸道部12Bは天秤7の位置
から僅かに直線状に延びた後に下側へと一定の曲率をも
ってL字状に屈曲すると共に、後述の中継糸道20に向
けて斜め下方へと直線状に延びている。そして、天秤用
糸道形成部9の可動板11は後述のアクチュエータ14
等により固定板10に対して進退され、固定板10の衝
合面上に可動板11の衝合面を気密状態で密着させたと
きには、天秤用糸道12が固定板10と可動板11との
間にエア通路として形成される。The second yarn path portion 12B extends slightly linearly from the position of the balance 7 and then bends downward in a L-shape with a constant curvature, and is directed toward a relay yarn path 20 described later. It extends linearly diagonally downward. The movable plate 11 of the balance thread path forming section 9 is connected to an actuator 14 described later.
When the abutment surface of the movable plate 11 is brought into close contact with the abutment surface of the fixed plate 10 in an airtight state on the abutment surface of the fixed plate 10, the balance thread path 12 is moved between the fixed plate 10 and the movable plate 11. Is formed as an air passage.
【0029】13は天秤用糸道形成部9の固定板10お
よび可動板11に形成された天秤用ガイド穴で、該天秤
用ガイド穴13は図5に示す如く天秤7の揺動軌跡に沿
って上下方向に一定の長さで延び、ミシン動作(刺繍作
業)時に天秤7が上,下に揺動するのを許すようになっ
ている。また、天秤用糸道形成部9の固定板10および
可動板11には、上部側が天秤用ガイド穴13の中間位
置まで該天秤用ガイド穴13に沿って延び、下部側が天
秤用ガイド穴13に対し一定の曲率をもって円弧状に延
びたレバー用ガイド穴13Aが形成されている。そし
て、該レバー用ガイド穴13Aは後述する糸さばきレバ
ー48の糸掛部57側が図5中の矢示A方向に揺動され
るのを許す構成となっている。Reference numeral 13 denotes a balance guide hole formed in the fixed plate 10 and the movable plate 11 of the balance thread path forming section 9. The balance guide hole 13 follows the swing locus of the balance 7 as shown in FIG. The balance 7 is vertically extended at a fixed length, and allows the balance 7 to swing up and down during the sewing operation (embroidery operation). The upper and lower sides of the fixed plate 10 and the movable plate 11 of the balance thread path forming unit 9 extend along the balance guide hole 13 to an intermediate position of the balance guide hole 13, and the lower side extends to the balance guide hole 13. On the other hand, a lever guide hole 13A extending in an arc shape with a constant curvature is formed. The lever guide hole 13A is configured to allow the side of the thread catching portion 57 of the thread separating lever 48, which will be described later, to swing in the direction of arrow A in FIG.
【0030】14は天秤用糸道形成部9の固定板10と
可動板11との間に設けられた糸道開放手段としてのア
クチュエータを示し、該アクチュエータ14は外部から
エア圧が給排されることにより、可動板11を前記ガイ
ド等を介して固定板10側に進退させ、可動板11を固
定板10に対して衝合または離間させる。そして、アク
チュエータ14は糸通し作業が完了し、ミシン動作を開
始する前に可動板11を固定板10から離間させること
により天秤用糸道12を開放し、上糸Sを天秤用糸道1
2からフリーな状態とする。An actuator 14 is provided between the fixed plate 10 and the movable plate 11 of the balance thread path forming section 9 as a thread path opening means. The actuator 14 is supplied with air pressure from the outside. Thus, the movable plate 11 is moved toward and away from the fixed plate 10 via the guide and the like, and the movable plate 11 is brought into contact with or separated from the fixed plate 10. When the threading operation is completed, the actuator 14 separates the movable plate 11 from the fixed plate 10 before starting the sewing operation, thereby opening the thread path 12 for the balance and moving the upper thread S to the thread path 1 for the balance.
2 to a free state.
【0031】15は天秤用糸道形成部9の下側に位置し
てヘッド端部3Bに設けられた中継糸道形成部で、該中
継糸道形成部15は図2および図3に示すように、上端
側が天秤用糸道形成部9に対し固定板10の下端側で揺
動アーム16を介して連結され、下端側がミシン針5の
位置まで下向きに延びた固定板17と、該固定板17に
対しガイド18,18を介して衝合、離間可能に配設さ
れた可動板19とからなり、該可動板19と固定板17
との衝合面側には下向きに延びる中継糸道20が、例え
ば0.5〜1mm程度の深さをもった断面U字状の凹溝
からなる細溝として形成されている。Reference numeral 15 denotes a relay yarn path forming section provided below the balance yarn path forming section 9 and provided at the head end 3B. As shown in FIGS. A fixing plate 17 having an upper end connected to the balance thread path forming portion 9 at a lower end of the fixing plate 10 via a swing arm 16 and a lower end extending downward to the position of the sewing machine needle 5; A movable plate 19 is provided so as to be able to abut against and separate from the movable plate 17 via guides 18, 18.
A relay thread path 20 extending downward is formed as a narrow groove having a U-shaped cross section having a depth of, for example, about 0.5 to 1 mm on the side of the abutting surface.
【0032】ここで、中継糸道20は図3に示す如く、
上端側が天秤用糸道12の下端側に対向して開口し下端
側が下向きに延びる直線状糸道部20Aと、該直線状糸
道部20Aの下端側から一定の曲率をもって略「し」字
状に屈曲し、後述の糸姿勢矯正器23に向けて水平方向
に延びる曲線状糸道部20Bとから構成されている。そ
して、中継糸道形成部15の固定板17および可動板1
9は平板状に形成され、その下端側は中継糸道20の曲
線状糸道部20Bに沿って湾曲している。Here, the relay yarn path 20 is, as shown in FIG.
A linear thread path portion 20A whose upper end side is opened facing the lower end side of the balance thread path 12 and whose lower end side extends downward, and a substantially "S" -like shape having a constant curvature from the lower end side of the linear thread path section 20A. And a curved yarn path portion 20B extending in the horizontal direction toward a yarn posture corrector 23 described later. Then, the fixed plate 17 and the movable plate 1 of the relay yarn path forming section 15
9 is formed in a flat plate shape, and its lower end side is curved along the curved yarn path portion 20B of the relay yarn path 20.
【0033】なお、中継糸道形成部15の固定板17、
可動板19についてもそれぞれの衝合面が平滑面として
形成され、互いに気密状態で衝合可能となっている。ま
た、前記天秤用糸道12および中継糸道20の途中に
は、糸誘導機構としての複数の給排ノズル(図示せず)
が設けられ、これらの給排ノズルは圧気源からのエアを
エア給排弁(図示せず)等を介して天秤用糸道12およ
び中継糸道20内に給排することにより、天秤用糸道1
2および中継糸道20内に負圧または正圧を発生させ、
例えば糸端を整形した状態の上糸Sを天秤用糸道12お
よび中継糸道20に沿って糸姿勢矯正器23側へと誘導
するものである。The fixing plate 17 of the relay yarn path forming section 15
As for the movable plate 19, the respective abutting surfaces are formed as smooth surfaces, and can abut against each other in an airtight state. A plurality of supply / discharge nozzles (not shown) serving as a yarn guiding mechanism are provided in the middle of the balance yarn path 12 and the relay yarn path 20.
These supply / discharge nozzles supply / discharge air from a pressurized air source into / from the balance thread path 12 and the relay thread path 20 via an air supply / discharge valve (not shown) or the like. Road 1
2 and a negative pressure or a positive pressure is generated in the relay yarn path 20;
For example, the upper yarn S in a state where the yarn end is shaped is guided to the yarn posture corrector 23 along the balance yarn path 12 and the relay yarn path 20.
【0034】21は中継糸道形成部15の固定板17と
可動板19との間に設けられた糸道開放手段としてのア
クチュエータで、該アクチュエータ21は外部からエア
圧が給排されることにより可動板19を各ガイド18に
沿って駆動し、該可動板19を固定板17に対して衝合
または離間させる。そして、アクチュエータ21により
可動板19を固定板17に図2に示す如く衝合させたと
きには、可動板19と固定板17との間に中継糸道20
がエア通路として形成される。An actuator 21 is provided between the fixed plate 17 and the movable plate 19 of the relay yarn path forming section 15 and serves as a yarn path opening means. The movable plate 19 is driven along each guide 18, and the movable plate 19 abuts or separates from the fixed plate 17. When the movable plate 19 is brought into contact with the fixed plate 17 by the actuator 21 as shown in FIG.
Are formed as air passages.
【0035】また、アクチュエータ21は可動板19を
固定板17から図5中の矢示B方向に離間させたときに
中継糸道20を開放し、上糸Sを中継糸道20から離脱
可能にフリーな状態とする。さらに、中継糸道形成部1
5の固定板17はその上端側が揺動アーム16に固定さ
れ、下端側は後述する揺動ブラケット30の延長部30
A上に固定されている。そして、中継糸道形成部15は
ミシン針用糸道形成部22と共に後述の進退機構28に
より、揺動アーム16と揺動ブラケット30の回動中心
OーOに沿って図2に示す糸通し位置と図5に示す退避
位置との間で回動される構成となっている。When the movable plate 19 is separated from the fixed plate 17 in the direction of the arrow B in FIG. 5, the actuator 21 opens the relay yarn path 20 so that the upper thread S can be detached from the relay yarn path 20. Be free. Further, the relay yarn path forming section 1
The upper end of the fixing plate 17 is fixed to the swing arm 16, and the lower end of the fixing plate 17 is an extension 30 of a swing bracket 30 described later.
A is fixed on A. Then, the relay thread path forming unit 15 and the sewing machine thread path forming unit 22 are moved along the rotation center OO of the swing arm 16 and the swing bracket 30 by the advance / retreat mechanism 28 to be described later. It is configured to be rotated between the position and the retracted position shown in FIG.
【0036】22は天秤用糸道形成部9および中継糸道
形成部15等と共に糸道形成機構8を構成するミシン針
用糸道形成部で、該ミシン針用糸道形成部22は後述の
糸姿勢矯正器23と糸吸引器26とからなり、これらは
本出願人が先に、特願平8−75157号で提案したも
のとほぼ同様に構成されている。Reference numeral 22 denotes a thread path forming section for the sewing needle which constitutes the thread path forming mechanism 8 together with the balance thread path forming section 9 and the relay thread path forming section 15, and the like. It is composed of a yarn attitude corrector 23 and a yarn suction device 26, which are configured in substantially the same manner as previously proposed by the present applicant in Japanese Patent Application No. 8-75157.
【0037】23は中継糸道形成部15と共にミシン針
5に対して進退可能に配設された糸姿勢矯正器で、該糸
姿勢矯正器23は図3および図5に示す如く、揺動ブラ
ケット30の延長部30A上に設けられ上,下に2分割
されるノズル半割体24A,24Bと、該ノズル半割体
24A,24B間に形成されミシン針5の針孔に向けて
直線状に延びるノズル状糸道(図示せず)と、ノズル半
割体24A,24Bに隣接して揺動ブラケット30の延
長部30A上に設けられ、ノズル半割体24A,24B
を上下方向で衝合、離間させる矯正シリンダ25等とか
ら構成されている。Numeral 23 denotes a yarn posture corrector disposed so as to be able to advance and retreat with respect to the sewing needle 5 together with the relay yarn path forming part 15. The yarn posture corrector 23 is, as shown in FIGS. Nozzle halves 24A and 24B provided on the extension 30A of the nozzle 30 and divided into upper and lower portions, and linearly formed toward the needle hole of the sewing machine needle 5 formed between the nozzle halves 24A and 24B. An extended nozzle-like thread path (not shown) is provided on the extension 30A of the swing bracket 30 adjacent to the nozzle halves 24A, 24B.
And a correction cylinder 25 for abutment and separation in the vertical direction.
【0038】ここで、該矯正シリンダ25はエアシリン
ダからなり、昇降レバー25Aを外部からエア圧で上下
動させることにより、上側のノズル半割体24Aを下側
のノズル半割体24Bに対して昇降させる。即ち、ノズ
ル半割体24Aは上昇したときにノズル半割体24Bか
ら離間し、下降したときにはノズル半割体24Bに対し
てノズル半割体24Aの下面側が衝合される。そして、
ノズル半割体24A,24Bは互いに衝合されたときに
該ノズル半割体24A,24B間に前記ノズル状糸道を
形成し、この状態でノズル状糸道は一端側が曲線状糸道
部20Bの先端側に正対し、他端側がミシン針5の針孔
と正対する。The straightening cylinder 25 is an air cylinder, and the upper and lower nozzle halves 24A are moved with respect to the lower nozzle halves 24B by vertically moving the lift lever 25A up and down by air pressure. Raise and lower. That is, when the nozzle half body 24A rises, it is separated from the nozzle half body 24B, and when it descends, the lower surface side of the nozzle half body 24A abuts against the nozzle half body 24B. And
When the nozzle halves 24A and 24B abut each other, the nozzle-shaped yarn path is formed between the nozzle halves 24A and 24B. In this state, the nozzle-shaped yarn path has a curved yarn path portion 20B at one end. , And the other end faces the needle hole of the sewing needle 5.
【0039】さらに、ノズル半割体24A,24Bのい
ずれか一方にはエア導入口(図示せず)等が形成され、
このエア導入口は前記圧気源からのエアをエア給排弁等
を介して前記ノズル状糸道の下流側に向け噴出させる。
そして、糸姿勢矯正器23はノズル状糸道の一端側を曲
線状糸道部20Bの先端側に正対させ、他端側をミシン
針5の針孔と正対させた状態で、前記エア導入口からの
エアをノズル状糸道の下流側に向けて噴出させることに
より、上糸Sの糸姿勢をノズル状糸道内で直線状に矯正
しつつ、後述の糸吸引器26と協働して上糸Sをミシン
針5の針孔に挿通させる。Further, an air inlet (not shown) or the like is formed in one of the nozzle half bodies 24A and 24B.
The air inlet blows air from the pressure source toward the downstream side of the nozzle-shaped yarn path via an air supply / discharge valve or the like.
Then, the yarn posture corrector 23 has the one end of the nozzle-like yarn path facing the tip end of the curved yarn path portion 20B and the other end thereof facing the needle hole of the sewing machine needle 5, and the yarn posture corrector 23 has the air. By ejecting air from the introduction port toward the downstream side of the nozzle-shaped yarn path, the air posture of the upper thread S is corrected in a straight line in the nozzle-shaped yarn path, while cooperating with a later-described yarn suction device 26. The upper thread S is inserted through the needle hole of the sewing machine needle 5.
【0040】また、矯正シリンダ25によってノズル半
割体24Aをノズル半割体24Bから上方に離間させた
ときには前記ノズル状糸道が開放され、例えば先端側が
ミシン針5の針孔に挿通され天秤7側へと延びる上糸S
は、このノズル状糸道からフリーな状態となって自動的
に離脱されることになる。そして、この状態でミシン針
用糸道形成部22は中継糸道形成部15と共にミシン針
5への糸通し位置から図1中の矢示C方向ヘとヘッド部
3の固定端3A側に回動され、ミシン動作時には図5に
示す退避位置となってミシンの前側(矢示D方向)から
見たミシン針5周囲の視界を広げる構成となっている。When the nozzle half 24A is separated upward from the nozzle half 24B by the straightening cylinder 25, the nozzle-shaped yarn path is opened. For example, the tip side is inserted into the needle hole of the sewing machine needle 5 and the balance 7 is inserted. Upper thread S extending to the side
Is automatically released from the nozzle-like yarn path in a free state. In this state, the thread path forming section 22 for the sewing machine together with the relay path forming section 15 is turned from the threading position to the sewing needle 5 in the direction of arrow C in FIG. When the sewing machine is in operation, it is in the retracted position shown in FIG. 5 so that the field of view around the sewing needle 5 as viewed from the front side of the sewing machine (in the direction of arrow D) is widened.
【0041】26はミシン針5の針孔を挟んで糸姿勢矯
正器23のノズル状糸道と対向するように揺動ブラケッ
ト30に取付けられた糸吸引器で、該糸吸引器26は一
端側が小径の糸吸引部26Aとなってミシン針5の針孔
に対向し、他端側は上糸Sの引出部26Bとなってい
る。また、糸吸引器26の長さ方向中間部にはエア導入
口(図示せず)が形成され、このエア導入口は前記圧気
源からのエアを引出部26B側に向けて流通させる。そ
して、このときのエア流により糸吸引部26A側には負
圧が発生し、これによって糸姿勢矯正器23からの上糸
Sはミシン針5の針孔に挿通され、糸吸引部26Aを介
して引出部26Bの位置まで導かれることになる。A thread sucker 26 is attached to the swing bracket 30 so as to face the nozzle-shaped thread path of the thread posture corrector 23 with the needle hole of the sewing machine needle 5 interposed therebetween. A small-diameter thread suction section 26A faces the needle hole of the sewing machine needle 5, and the other end is a pull-out section 26B for the upper thread S. Further, an air inlet (not shown) is formed at a middle portion in the length direction of the yarn suction device 26, and the air inlet circulates air from the compressed air source toward the drawer 26B. Then, a negative pressure is generated on the side of the yarn suction unit 26A due to the air flow at this time, whereby the upper thread S from the yarn posture corrector 23 is inserted into the needle hole of the sewing machine needle 5 and passes through the yarn suction unit 26A. Thus, it is guided to the position of the drawer 26B.
【0042】ここで、糸姿勢矯正器23および糸吸引器
26は前記天秤用糸道形成部9および中継糸道形成部1
5と共に糸道形成機構8を構成し、糸姿勢矯正器23の
矯正シリンダ25は糸道開放手段の一部を構成している
ものである。また、糸姿勢矯正器23および糸吸引器2
6のエア導入口等は前記天秤用糸道12および中継糸道
20の給排ノズル等と共に上糸Sの糸誘導機構を構成
し、気体としてのエア流により上糸Sをミシン針5の針
孔に向けて誘導するものである。Here, the yarn posture corrector 23 and the yarn suction device 26 are connected to the balance yarn path forming section 9 and the relay yarn path forming section 1.
5 together with the yarn path forming mechanism 8, and the correction cylinder 25 of the yarn posture corrector 23 forms a part of the yarn path opening means. Further, the yarn posture corrector 23 and the yarn suction device 2
The air inlet port 6 and the like together with the supply / discharge nozzles of the balance thread path 12 and the relay thread path 20 constitute a thread guiding mechanism for the upper thread S. It is directed toward the hole.
【0043】27は糸吸引器26の引出部26Bに対向
して揺動ブラケット30に設けられた糸通し検出手段と
しての糸通し検知器を示し、該糸通し検知器27は光セ
ンサ等からなり、糸吸引器26の引出部26Bから上糸
Sの先端側が引出されているか否かを検知することによ
って、ミシン針5に上糸Sが挿通されたか否かを検出す
るものである。そして、糸通し検知器27はミシン針5
に上糸Sが挿通されたことを検知したときに、糸通し完
了信号を刺繍機制御装置(図示せず)等に出力し、後述
の進退機構28を作動させる。Reference numeral 27 denotes a threading detector as threading detecting means provided on the swing bracket 30 so as to face the draw-out portion 26B of the thread suction device 26. The threading detector 27 comprises an optical sensor or the like. By detecting whether or not the tip side of the upper thread S is pulled out from the pull-out portion 26B of the thread suction device 26, it is detected whether or not the upper thread S has been inserted into the sewing machine needle 5. Then, the threading detector 27 is provided with the sewing needle 5.
When it is detected that the upper thread S has been inserted into the sewing machine, a threading completion signal is output to an embroidery machine controller (not shown) or the like, and an advance / retreat mechanism 28 described later is operated.
【0044】28はミシン針用糸道形成部22をミシン
針5に対して中継糸道形成部15と共に進退させる進退
機構で、該進退機構28は図3に示す如く、中継糸道形
成部15の揺動アーム16と共に回動中心OーO上に配
設された回動筒29と、上端側が該回動筒29に連結さ
れ、下端側がミシン針用糸道形成部22側に向けて延び
た連結部材としての揺動ブラケット30と、後述のウォ
ームギヤ31等とから構成され、揺動ブラケット30の
揺動位置は位置検知センサ(図示せず)によって検出す
るようになっている。Numeral 28 denotes an advancing / retracting mechanism for moving the sewing thread path forming section 22 together with the relay thread path forming section 15 with respect to the sewing needle 5. As shown in FIG. A rotating cylinder 29 disposed on the center of rotation O-O together with the swing arm 16 of the above, an upper end side is connected to the rotating cylinder 29, and a lower end side extends toward the sewing machine thread path forming section 22 side. A swinging bracket 30 as a connecting member, a worm gear 31 described later, and the like are provided, and the swinging position of the swinging bracket 30 is detected by a position detection sensor (not shown).
【0045】ここで、揺動ブラケット30の下端側には
図3に示す如く、ミシン針5の下側を中継糸道形成部1
5の固定板17の位置まで水平方向に延びた延長部30
Aが一体に設けられ、該延長部30Aは中継糸道形成部
15をミシン針用糸道形成部22(糸姿勢矯正器23お
よび糸吸引器26)と共に一体的に支持する構成となっ
ている。また、揺動ブラケット30の上部側には図4、
図6に示すように張出しアーム30Bが一体形成され、
該張出しアーム30Bの先端側には後述のリンク42が
ピン結合されている。As shown in FIG. 3, the lower side of the swinging bracket 30 is connected to the lower side of the sewing machine needle 5 by the relay thread path forming section 1.
Extension 30 extending horizontally to the position of the fixing plate 17 of FIG.
A is provided integrally, and the extension portion 30A is configured to integrally support the relay thread path forming section 15 together with the sewing thread path forming section 22 (the thread posture corrector 23 and the thread suction device 26). . Also, on the upper side of the swing bracket 30, FIG.
As shown in FIG. 6, the overhang arm 30B is integrally formed,
A link 42, which will be described later, is pin-connected to the distal end side of the overhang arm 30B.
【0046】31はヘッド端部3Bの背面側に配設され
たウォームギヤで、該ウォームギヤ31は図4、図6に
示す如くステッピングモータ等の回転源(図示せず)に
駆動軸32を介して連結され、回動筒29を介して揺動
ブラケット30等を矢示C方向へと回動させる構成とな
っている。この場合、揺動ブラケット30は前記回転源
によりウォームギヤ31等を介して回動され、ミシン針
用糸道形成部22をミシン針5側に近接させる糸通し位
置(図2ないし図4参照)と、ミシン針5から離れた図
5、図6に示す退避位置とに進退させるものである。そ
して、進退機構28の揺動ブラケット30およびウォー
ムギヤ31等はミシン針5への糸通し後に前記天秤用糸
道12、中継糸道20および糸姿勢矯正器23のノズル
状糸道等を開放する糸道開放手段を前記アクチュエータ
14,21および矯正シリンダ25と共に構成してい
る。A worm gear 31 is provided on the back side of the head end 3B. The worm gear 31 is connected to a rotation source (not shown) such as a stepping motor via a drive shaft 32 as shown in FIGS. The swing bracket 30 and the like are rotated in the direction indicated by the arrow C via the rotating cylinder 29. In this case, the swing bracket 30 is rotated by the rotation source via the worm gear 31 and the like, and a threading position (see FIGS. 2 to 4) for bringing the sewing machine thread path forming portion 22 close to the sewing machine needle 5 side. 5 and 6 away from the sewing machine needle 5. The swing bracket 30 and the worm gear 31 of the advance / retreat mechanism 28 open the thread path 12 for the balance, the relay thread path 20, and the nozzle-shaped thread path of the thread attitude corrector 23 after threading the sewing machine needle 5. The road opening means is constituted together with the actuators 14, 21 and the correction cylinder 25.
【0047】33,34はヘッド端部3Bの背面側に設
けれた微調整機構で、該微調整機構33,34はミシン
針5の種類等に応じてつまみ部33A,34Aを手動等
で回動操作することにより揺動ブラケット30を図4中
の矢示E,F方向に移動させる。これによって、糸姿勢
矯正器23および糸吸引器26等はミシン針5の針孔と
前,後で正対するようにその位置が微調整されるもので
ある。Reference numerals 33 and 34 denote fine adjustment mechanisms provided on the back side of the head end 3B. The fine adjustment mechanisms 33 and 34 manually rotate the knobs 33A and 34A according to the type of the sewing machine needle 5 and the like. The swing bracket 30 is moved in the directions indicated by arrows E and F in FIG. Thus, the positions of the yarn posture corrector 23 and the yarn suction device 26 are finely adjusted so as to face the needle hole of the sewing needle 5 before and after.
【0048】35はヘッド端部3Bの下端側にピン36
を介して回動可能に連結された布押え具で、該布押え具
35は図7、図8に示すように、取付ブラケット37
と、該取付ブラケット37に回動軸38Aを介して矢示
G方向に回動可能に取付けられたコ字形状のホルダ38
と、該ホルダ38内に一対のガイド39,39を介して
上下動可能に配設された可動子40と、該可動子40を
上,下に駆動するためにホルダ38の下面側に設けられ
たソレノイド等からなる電磁アクチュエータ41と、後
述のプレッサ43等によって構成されている。A pin 36 is provided at the lower end of the head end 3B.
The cloth presser 35 is rotatably connected to the cloth presser 35 via a mounting bracket 37 as shown in FIGS.
And a U-shaped holder 38 attached to the mounting bracket 37 via a rotating shaft 38A so as to be rotatable in the direction of arrow G.
And a mover 40 disposed in the holder 38 so as to be vertically movable via a pair of guides 39, 39, and provided on a lower surface side of the holder 38 for driving the mover 40 up and down. An electromagnetic actuator 41 composed of a solenoid or the like, and a presser 43 described later and the like.
【0049】ここで、布押え具35の取付ブラケット3
7は図4、図6に示すように、リンク42を介して揺動
ブラケット30の張出しアーム30Bに回動可能にピン
結合され、進退機構28で揺動ブラケット30を回動す
るときに、布押え具35はピン36を中心にして図4中
の矢示H方向に回動される。そして、布押え具35は図
5、図6に示す保持位置(布押え位置)へと回動された
ときに、基台2側の針板6との間で縫製対象物としての
刺繍布をプレッサ43により保持する構成となってい
る。Here, the mounting bracket 3 of the cloth presser 35
As shown in FIGS. 4 and 6, reference numeral 7 denotes a pin which is rotatably connected to a projecting arm 30B of the swing bracket 30 via a link 42. When the swing bracket 30 is rotated by the advance / retreat mechanism 28, a cloth 7 is used. The presser 35 is rotated about the pin 36 in the direction indicated by the arrow H in FIG. When the cloth presser 35 is rotated to the holding position (the cloth presser position) shown in FIGS. 5 and 6, the embroidery cloth as a sewing object is interposed between the cloth presser 35 and the needle plate 6 on the base 2 side. It is configured to be held by the presser 43.
【0050】43は布押え具35の一部を構成するプレ
ッサで、該プレッサ43は図7、図8に示す如く可動子
40にビス44,44等を介して固着され、その下端側
は刺繍布に対する押圧部43Aとなっている。また、該
押圧部43Aには図3に示すように長円形状の針穴43
Bが形成され、該針穴43B内にはミシン動作時にミシ
ン針5が針板6側に向けて挿通されるようになってい
る。そして、プレッサ43は図5、図6に示す保持位置
で押圧部43Aにより刺繍布を針板6側へと押圧し、ミ
シン動作時に刺繍布の縫い目が位置ずれするのを規制す
るものである。Reference numeral 43 denotes a presser constituting a part of the cloth presser 35. As shown in FIGS. 7 and 8, the presser 43 is fixed to the mover 40 via screws 44, 44 and the like, and the lower end thereof is embroidered. It is a pressing portion 43A for the cloth. The pressing portion 43A has an oval needle hole 43 as shown in FIG.
The sewing machine needle 5 is inserted into the needle hole 43B toward the needle plate 6 during sewing operation. The presser 43 presses the embroidery cloth toward the needle plate 6 by the pressing portion 43A at the holding position shown in FIGS. 5 and 6, and regulates the displacement of the stitches of the embroidery cloth during sewing operation.
【0051】ここで、プレッサ43はミシン針5の運針
動作に同期して電磁アクチュエータ41により可動子4
0と共に上下動され、例えばミシン針5が刺繍布の上方
へと持上げられている間は、プレッサ43が刺繍布から
僅かに離間することにより、刺繍枠等の枠移動を許すも
のである。Here, the presser 43 moves the movable element 4 by the electromagnetic actuator 41 in synchronization with the operation of moving the sewing machine needle 5.
When the sewing machine needle 5 is lifted above the embroidery cloth, for example, the presser 43 slightly moves away from the embroidery cloth to allow the embroidery frame or the like to move.
【0052】また、刺繍布を刺繍枠と共に交換するよう
な場合には、プレッサ43がホルダ38の回動軸38A
を中心として図7中の矢示G方向へと二点鎖線で示す位
置まで回動され、刺繍枠等の交換時にプレッサ43が邪
魔になるのを防止する構成となっている。なお、布押え
具35の取付ブラケット37とホルダ38との間にはボ
ールプランジャ等の位置決め手段が設けられ、プレッサ
43を図7中に実線で示す位置と二点鎖線で示す位置と
に係脱可能に係止できるようになっている。When the embroidery cloth is exchanged together with the embroidery frame, the presser 43 is driven by the rotating shaft 38A of the holder 38.
7 is rotated in the direction of arrow G in FIG. 7 to the position shown by the two-dot chain line to prevent the presser 43 from obstructing the replacement of the embroidery frame or the like. Positioning means such as a ball plunger is provided between the mounting bracket 37 and the holder 38 of the cloth presser 35, and the presser 43 is disengaged between a position shown by a solid line and a position shown by a two-dot chain line in FIG. It can be locked as much as possible.
【0053】45はヘッド部3上に設けられた支持板
で、該支持板45は図1等に示す如く略長方形の平板か
らなり、支持板45上には本出願人が先に、特願平8−
357240号で提案したミシンとほぼ同様にテンショ
ン台、糸選択機構および糸送り機構(いずれも図示せ
ず)等が配設されている。また、前記テンション台に
は、例えば10〜20個程度の糸調子(図示せず)が設
けられ、各糸調子は複数の上糸Sを個別に収納した各チ
ーズケース(図示せず)からの上糸Sに張力を付与しつ
つ、上糸Sを糸ガイド46および天秤7側に向けて低摩
擦給糸による糸補給を行う構成となっている。Reference numeral 45 denotes a support plate provided on the head portion 3. The support plate 45 is formed of a substantially rectangular flat plate as shown in FIG. 1 and the like. Hei 8-
A tension base, a thread selection mechanism, a thread feed mechanism (all not shown), and the like are provided almost in the same manner as the sewing machine proposed in 357240. Further, the tension table is provided with, for example, about 10 to 20 thread tensions (not shown), and each thread tension is obtained from each cheese case (not shown) in which a plurality of upper threads S are individually stored. While applying tension to the upper thread S, the upper thread S is supplied toward the yarn guide 46 and the balance 7 by low-friction yarn supply.
【0054】即ち、各糸調子は上糸Sに糸取りばね等を
介して、例えば25〜50g程度の張力を与え、ミシン
針5等により上糸Sがこの張力を越えて引張られるとき
に、天秤7側に向けて上糸Sが給糸されるのを許すもの
である。また、前記糸選択機構は前記各チーズケースか
らの上糸Sのうち、いずれか1本の上糸Sを選択する機
能を有し、糸選択機構で選択された上糸Sは前記糸送り
機構により糸ガイド46側に向けて下方へと送出され
る。That is, each thread tension imparts a tension of, for example, about 25 to 50 g to the upper thread S via a thread take-up spring or the like, and when the upper thread S is pulled beyond this tension by the sewing machine needle 5 or the like, the balance is adjusted. The upper thread S is allowed to be supplied toward the seventh side. Further, the yarn selection mechanism has a function of selecting any one of the upper yarns S from the respective cheese cases, and the upper yarn S selected by the yarn selection mechanism is controlled by the yarn feed mechanism. As a result, it is sent downward toward the yarn guide 46 side.
【0055】46は前記糸送り機構からの上糸Sを天秤
用糸道形成部9の糸道部12A内へと導く糸ガイド、4
7は糸ガイド46を上,下に昇降させるための糸ガイド
昇降機構で、該糸ガイド昇降機構47はエアシリンダ等
によって駆動され、例えば糸切り機構(図示せず)によ
り上糸Sを切断して糸端を形成するとき等に、糸ガイド
46を下方に移動させるものである。Reference numeral 46 denotes a thread guide for guiding the upper thread S from the thread feed mechanism into the thread path section 12A of the balance thread path forming section 9.
Reference numeral 7 denotes a thread guide elevating mechanism for raising and lowering the thread guide 46. The thread guide elevating mechanism 47 is driven by an air cylinder or the like, and cuts the upper thread S by, for example, a thread cutting mechanism (not shown). The thread guide 46 is moved downward when forming a thread end.
【0056】48はヘッド端部3B側に回動可能に設け
られた糸さばきレバーで、該糸さばきレバー48は図
1、図2に示す如く棒状のビーム49,50と、該ビー
ム49,50間を一体に連結したジョイント51等によ
って構成され、ビーム50の基端側は回動中心52とな
って糸さばきモータ53の出力軸にウォームギヤ54等
を介して連結されている。そして、糸さばきレバー48
は糸さばきモータ53によりウォームギヤ54を介して
回動され、図3に示すように天秤7に対して上糸Sの糸
通しを行うときには、図2に実線で示す位置に配置され
る。また、天秤7およびミシン針5への糸通しが完了し
たときには、糸さばきレバー48が図2、図5に仮想線
で示す位置まで矢示A方向に回動され、後述の如く上糸
Sのたるみを吸収するものである。Reference numeral 48 denotes a thread separating lever rotatably provided on the side of the head end 3B. The thread separating lever 48 includes rod-like beams 49, 50 and the beams 49, 50 as shown in FIGS. The base end of the beam 50 is connected to the output shaft of a yarn separating motor 53 via a worm gear 54 and the like as a rotation center 52. And thread handling lever 48
Is rotated by a thread separating motor 53 via a worm gear 54, and is arranged at a position shown by a solid line in FIG. 2 when the upper thread S is threaded through the balance 7 as shown in FIG. When the threading to the balance 7 and the sewing needle 5 is completed, the thread separating lever 48 is rotated in the direction indicated by the arrow A to the position indicated by the imaginary line in FIGS. It absorbs slack.
【0057】ここで、糸さばきレバー48はビーム49
が導電性材料により形成され、ジョイント51は絶縁性
材料により形成されている。そして、ジョイント51に
は接続金具55が設けられ、該接続金具55は後述の糸
切れ検出信号を出力するためにビーム49に電気的に接
続される構成となっている。なお、ウォームギヤ54は
ギヤボックス56内に収容され、該ギヤボックス56は
糸さばきモータ53と共にヘッド部3の側面部等に取付
けられている。Here, the thread separating lever 48 is
Are formed of a conductive material, and the joint 51 is formed of an insulating material. The joint 51 is provided with a connection fitting 55, and the connection fitting 55 is electrically connected to the beam 49 in order to output a yarn breakage detection signal described later. The worm gear 54 is housed in a gear box 56, and the gear box 56 is attached to the side surface of the head unit 3 together with the yarn separating motor 53.
【0058】57は糸さばきレバー48の一部を構成
し、天秤用糸道12の途中位置で天秤7に対して接近,
離間する糸掛部で、該糸掛部57は図9ないし図11に
示す如く、ビーム49の先端側に連結された直方体状の
連結金具58と、基端側が該連結金具58にビス59等
を介して取付けられ、先端側が天秤用糸道形成部9のレ
バー用ガイド穴13A内に挿入された糸取りばねとして
の接点ばね60と、後述のばねガイド61とから構成さ
れ、接点ばね60は図11に示すようにビーム49に対
してほぼ垂直となる方向に延びている。Reference numeral 57 designates a part of the thread separating lever 48, which approaches the balance 7 at an intermediate position of the thread path 12 for the balance.
As shown in FIGS. 9 to 11, the threading portion 57 is separated from the threading portion 57. The threading portion 57 has a rectangular parallelepiped connection metal fitting 58 connected to the distal end side of the beam 49, and the base end side has a screw 59 or the like. The contact spring 60 includes a contact spring 60 as a thread take-up spring, the tip side of which is inserted into the lever guide hole 13A of the balance thread path forming section 9, and a spring guide 61 to be described later. As shown in FIG. 11, it extends in a direction substantially perpendicular to the beam 49.
【0059】そして、接点ばね60は図13、図14に
示すようにばね性を有する金属線材(例えば0.6mm
程度の線径)により形成され、その先端側は長円形状を
なす糸掛け用のリング部60Aとなっている。また、接
点ばね60の基端側はコイル状に巻回された取付部60
Bとなり、該取付部60Bは図11に示すようにビス5
9等により連結金具58に固着されている。そして、接
点ばね60はリング部60Aが図9に示す如くレバー用
ガイド穴13A内に挿入され、該レバー用ガイド穴13
Aに沿って図5、図9中の矢示A方向へと糸さばきモー
タ53により駆動される。As shown in FIGS. 13 and 14, the contact spring 60 is a metal wire having a spring property (for example, 0.6 mm).
), And the distal end side thereof is an oval-shaped threading ring portion 60A. Further, the base end side of the contact spring 60 has a mounting portion 60 wound in a coil shape.
B, and the mounting portion 60B is a screw 5 as shown in FIG.
9 and the like, and is fixed to the connection fitting 58. The contact spring 60 has the ring portion 60A inserted into the lever guide hole 13A as shown in FIG.
It is driven by the yarn separating motor 53 in the direction of arrow A in FIGS.
【0060】ここで、糸さばきレバー48は糸掛部57
がミシン針5への糸通し時に、図5中に実線で示す如く
天秤用糸道12の糸道部12A,12B間に配置され、
この位置では図11に例示するように接点ばね60のリ
ング部60Aが天秤7に隣接される。そして、この状態
で接点ばね60のリング部60A内には天秤7と共に上
糸Sが挿通され、該上糸Sの糸端側は前述の如くミシン
針5に糸通しされる。また、ミシン針5への糸通し後に
は糸さばきレバー48全体が図5中に仮想線で示すよう
に、天秤7から大きく離れた位置まで糸さばきモータ5
3により矢示A方向に揺動(回動)され、ビーム49は
図9に示す如く後述のストッパ63に当接される。Here, the thread separating lever 48 is connected to the thread hook 57
Are arranged between the thread paths 12A and 12B of the thread path 12 for the balance as shown by a solid line in FIG.
In this position, the ring portion 60A of the contact spring 60 is adjacent to the balance 7 as illustrated in FIG. In this state, the upper thread S is inserted into the ring portion 60A of the contact spring 60 together with the balance 7, and the thread end side of the upper thread S is threaded through the sewing needle 5 as described above. Further, after threading the sewing machine needle 5, the thread separating motor 48 is moved to a position far away from the balance 7 as shown by a virtual line in FIG.
The beam 49 is swung (rotated) in the direction of arrow A by 3, and the beam 49 comes into contact with a stopper 63 described later as shown in FIG. 9.
【0061】61は接点ばね60を上,下にガイドする
ばねガイドで、該ばねガイド61は図9ないし図12に
示す如く基端側がビス62により連結金具58に固定さ
れ、先端側が接点ばね60の途中部位まで延びたガイド
部61Aとなっている。そして、該ガイド部61Aは図
12に示す如くコ字形状をなし、接点ばね60を左,右
両側から挟込むようにして該接点ばね60が上,下に撓
み変形するのを許しつつ、左,右へと撓み変形するのを
規制するものである。Reference numeral 61 denotes a spring guide for guiding the contact spring 60 upward and downward. As shown in FIGS. 9 to 12, the proximal end of the spring guide 61 is fixed to the connection fitting 58 by a screw 62, and the distal end thereof is connected to the contact spring 60. The guide portion 61A extends to an intermediate portion of the guide portion. The guide portion 61A is formed in a U-shape as shown in FIG. 12, and the contact spring 60 is sandwiched from both the left and right sides to allow the contact spring 60 to bend and deform upward and downward. This restricts bending deformation.
【0062】63はレバー用ガイド穴13Aの下端側に
位置して天秤用糸道形成部9の固定板10から立設され
た糸さばきレバー48用のストッパで、該ストッパ63
は絶縁性材料により図2、図9および図12に示すよう
にプレート状に形成され、その基端側ボルト64等によ
り天秤用糸道形成部9の固定板10上に固着された固定
部63Aとなっている。また、ストッパ63の先端側に
は図9に示すように略半円形状の切欠き63Bが形成さ
れ、該切欠き63B上には糸さばきレバー48のビーム
49が矢示A方向から当接し、これによってストッパ6
3は糸さばきレバー48を図1、図2および図5中に仮
想線で示す糸さばき位置に停止させる構成となってい
る。A stopper 63 is provided at a lower end of the lever guide hole 13A for the thread separating lever 48 provided upright from the fixing plate 10 of the thread path forming section 9 for the balance.
2, 9 and 12 are formed of an insulating material in the form of a plate, and are fixed on the fixing plate 10 of the thread path forming section 9 for the balance by the base end bolt 64 or the like. It has become. As shown in FIG. 9, a notch 63B having a substantially semicircular shape is formed on the distal end side of the stopper 63, and the beam 49 of the thread separating lever 48 comes into contact with the notch 63B in the direction of arrow A. This allows the stopper 6
Reference numeral 3 denotes a configuration in which the thread separating lever 48 is stopped at a thread separating position indicated by a virtual line in FIGS. 1, 2 and 5.
【0063】65は絶縁性のストッパ63に固着された
ばね受で、該ばね受65は導電性の金属ボルト等からな
り、ナット66,67等を介してストッパ63に螺着さ
れている。また、ナット66,67間にはラグ端子68
が締着され、該ラグ端子68にはリード線等に接続穴6
8Aが穿設されている。そして、糸さばきレバー48が
上糸Sのたるみを吸収するために図9中の矢示A方向に
下降され、糸さばき位置(図5中に仮想線で示す位置)
となったときには、図10および図12に示す如く接点
ばね60がばね受65上に押付けられる。Reference numeral 65 denotes a spring receiver fixed to an insulating stopper 63. The spring receiver 65 is made of a conductive metal bolt or the like, and is screwed to the stopper 63 via nuts 66, 67 and the like. A lug terminal 68 is provided between the nuts 66 and 67.
The lug terminal 68 has a connection hole 6 for a lead wire or the like.
8A is drilled. Then, the yarn separating lever 48 is lowered in the direction of arrow A in FIG. 9 to absorb the slack of the upper yarn S, and the yarn separating position (position indicated by a virtual line in FIG. 5).
Is reached, the contact spring 60 is pressed onto the spring receiver 65 as shown in FIGS.
【0064】そして、この状態でミシン動作を開始する
と、天秤7が上,下に揺動するに応じて上糸Sに引張り
力が与えられ、このときの上糸Sの動きに追従して接点
ばね60のリング部60Aが図10に示す如くリフト量
Lをもって仮想線の位置まで撓み変形する。これによ
り、接点ばね60はばね受65に対して接触,離間を繰
返すようになり、接点ばね60とばね受65とは互いに
接触,離間する毎にスイッチング動作する糸切れセンサ
69を構成するものである。なお、接点ばね60のリフ
ト量Lは、例えば2mm程度の大きさにばねガイド61
のガイド部61Aにより制限される。When the sewing machine operation is started in this state, a tensile force is applied to the upper thread S as the balance 7 swings up and down, and the contact of the upper thread S follows the movement of the upper thread S at this time. The ring portion 60A of the spring 60 bends and deforms to the position indicated by the imaginary line with the lift amount L as shown in FIG. As a result, the contact spring 60 repeatedly contacts and separates from the spring receiver 65, and the contact spring 60 and the spring receiver 65 constitute a thread break sensor 69 that performs a switching operation each time the contact spring 60 contacts and separates from each other. is there. The lift amount L of the contact spring 60 is set to, for example, about 2 mm.
Of the guide portion 61A.
【0065】この場合、糸切れセンサ69からの糸切れ
検出信号は、図12に示すラグ端子68と図5に示す接
続金具55からリード線等を介して前記刺繍機制御装置
へと出力される。そして、ミシン作業(刺繍作業)時に
接点ばね60とばね受65とがスイッチング動作を繰返
す間は、上糸Sに糸切れが発生していないものとして検
出される。一方、刺繍作業の途中で糸切れが発生する
と、天秤7の揺動に応じた上糸Sの動きが止まり、接点
ばね60の撓み変形が中断されるので、接点ばね60が
ばね受65に接触し続けるようになり、前記スイッチン
グ動作の停止によって糸切れを検出する。In this case, the thread breakage detection signal from the thread breakage sensor 69 is output from the lug terminal 68 shown in FIG. 12 and the connection fitting 55 shown in FIG. 5 to the embroidery machine control device via a lead wire or the like. . Then, during the sewing operation (embroidery operation), while the contact spring 60 and the spring receiver 65 repeat the switching operation, it is detected that the upper thread S is not broken. On the other hand, if a thread break occurs during the embroidery operation, the movement of the upper thread S according to the swing of the balance 7 stops, and the bending deformation of the contact spring 60 is interrupted. The thread break is detected by stopping the switching operation.
【0066】本実施例による刺繍機は上述の如き構成を
有するもので、次にその自動糸通し動作について説明す
る。The embroidery machine according to the present embodiment has the above-described configuration. Next, the automatic threading operation will be described.
【0067】まず、刺繍機の運転準備作業として前記主
軸モータでミシン針5および天秤7を予め決められた糸
通し位置(ミシン針5が針板6上から一定寸法だけ離れ
た高さ位置)まで移動させておく。これにより天秤7の
糸穴7Aを天秤用糸道12の糸道部12A,12B間に
位置合わせすることができる。First, as a preparatory operation for the operation of the embroidery machine, the sewing machine needle 5 and the balance 7 are moved by the spindle motor to a predetermined threading position (a height position where the sewing machine needle 5 is separated from the needle plate 6 by a certain distance). Move it. Thus, the thread hole 7A of the balance 7 can be positioned between the thread paths 12A and 12B of the thread path 12 for the balance.
【0068】一方、糸道形成機構8を作動させることに
より、糸姿勢矯正器23のノズル半割体24A,24B
を互いに衝合させて、この間に前記ノズル状糸道を形成
すると共に、進退機構28で揺動ブラケット30を揺動
させることにより、糸姿勢矯正器23および糸吸引器2
6からなるミシン針用糸道形成部22を中継糸道形成部
15と共に図3に示す糸通し位置とし、糸姿勢矯正器2
3の前記ノズル状糸道と糸吸引器26の糸吸引部26A
とをミシン針5の針孔に対向(正対)させるようにす
る。On the other hand, when the yarn path forming mechanism 8 is operated, the nozzle halves 24A, 24B
Are brought into contact with each other, the nozzle-shaped yarn path is formed in the meantime, and the swing bracket 30 is swung by the advance / retreat mechanism 28 to thereby adjust the yarn posture corrector 23 and the yarn suction device 2.
6 together with the relay thread path forming unit 15 as the threading position shown in FIG.
No. 3, the nozzle-like yarn path and the yarn suction portion 26A of the yarn suction device 26
Are made to face (facing) the needle hole of the sewing needle 5.
【0069】さらに、天秤用糸道形成部9の可動板11
を固定板10に衝合(密着)させ、該固定板10と可動
板11との間に天秤用糸道12を形成すると共に、中継
糸道形成部15の可動板19を固定板17に衝合(密
着)させ、該可動板19と可動板19との間に中継糸道
20を形成する。Further, the movable plate 11 of the balance thread path forming section 9
Is brought into contact with (fixed to) the fixed plate 10 to form the balance thread path 12 between the fixed plate 10 and the movable plate 11, and the movable plate 19 of the relay thread path forming unit 15 is brought into contact with the fixed plate 17. Then, the relay yarn path 20 is formed between the movable plates 19.
【0070】これにより、中継糸道20の曲線状糸道部
20Bは先端側が糸姿勢矯正器23の前記ノズル状糸道
に正対するようになる。また、このときに図1に示す糸
さばきモータ53により糸さばきレバー48を実線で示
す糸通し位置まで上昇させ、糸さばきレバー48の糸掛
部57(接点ばね60のリング部60A)を天秤7の糸
穴と左,右で正対させるようにする。As a result, the curved yarn path portion 20 B of the relay yarn path 20 has the front end side directly facing the nozzle-shaped yarn path of the yarn posture corrector 23. At this time, the thread separating lever 48 is raised to the threading position shown by the solid line by the thread separating motor 53 shown in FIG. 1, and the thread hooking portion 57 (the ring portion 60A of the contact spring 60) of the thread separating lever 48 is weighed by the balance 7. To the left and right with the thread hole of.
【0071】次に、自動糸通しを行うため支持板45の
上側(テンション台側)から糸送り機構等により上糸S
を糸ガイド46を介して天秤用糸道12内へと送込むよ
うにする。そして、このときに天秤用糸道形成部9およ
び中継糸道形成部15の各給排ノズルからエアを給排す
ることにより、天秤用糸道12および中継糸道20内に
負圧または正圧によるエア流を発生させ、先端側にエッ
ジ状の糸端が形成された上糸Sを天秤用糸道12の糸道
部12Aから天秤7の糸穴内に挿通しつつ、さらに糸道
部12Bを介して中継糸道20の直線状糸道部20A、
曲線状糸道部20Bへと円滑に誘導する。Next, in order to perform automatic threading, the upper thread S from the upper side of the support plate 45 (tension table side) by a thread feed mechanism or the like.
Is fed into the balance thread path 12 via the thread guide 46. At this time, air is supplied / discharged from the supply / discharge nozzles of the balance yarn path forming unit 9 and the relay yarn path forming unit 15, so that a negative pressure or a positive pressure is supplied into the balance yarn path 12 and the relay yarn path 20. The upper thread S having an edge-like thread end formed on the tip side is inserted from the thread path 12A of the balance thread path 12 into the thread hole of the balance 7 while the thread path 12B is further removed. Through the straight yarn path portion 20A of the relay yarn path 20,
The guide is smoothly guided to the curved yarn path section 20B.
【0072】この場合、上糸Sの糸端側が天秤用糸道1
2の糸道部12A,12B間を通過するときに、天秤7
の糸穴と共に接点ばね60のリング部60A内に上糸S
を糸端側から挿通し、この上糸Sを中継糸道20の曲線
状糸道部20Bから糸姿勢矯正器23へと誘導する。In this case, the thread end side of the upper thread S is
When passing between the yarn path portions 12A and 12B of the second
In the ring portion 60A of the contact spring 60 together with the thread hole of
From the yarn end side, and guides the upper yarn S from the curved yarn path portion 20B of the relay yarn path 20 to the yarn posture corrector 23.
【0073】さらに、糸姿勢矯正器23および糸吸引器
26側では圧気源からのエアを前記エア導入口を介して
ノズル状糸道の下流側に向けて噴出させると共に、糸吸
引器26内でも糸吸引部26A側から引出部26B側に
向けてエアを流通させ、このときのエア流により糸吸引
部26A側に負圧を発生させる。そして、このときのエ
ア流により糸姿勢矯正器23では上糸Sの糸姿勢を直線
状に矯正しつつ、糸吸引器26と協働して上糸Sをミシ
ン針5の針孔に挿通させる。Further, on the yarn posture correcting device 23 and the yarn suction device 26 side, air from the compressed air source is blown out toward the downstream side of the nozzle-shaped yarn path via the air introduction port, and also in the yarn suction device 26. Air is circulated from the yarn suction section 26A side to the drawing section 26B side, and a negative pressure is generated on the yarn suction section 26A side by the air flow at this time. Then, the yarn posture corrector 23 corrects the yarn posture of the upper thread S into a straight line by the air flow at this time, and cooperates with the thread suction device 26 to insert the upper thread S into the needle hole of the sewing machine needle 5. .
【0074】また、糸吸引器26側では糸吸引部26A
内に発生した負圧により、糸姿勢矯正器23からの上糸
Sをミシン針5の針孔を介して糸吸引部26A内に吸引
し、ミシン針5の針孔に挿通された上糸Sの先端側を糸
吸引部26Aを介して引出部26Bの位置へと導くよう
にする。そして、糸吸引器26の引出部26Bから上糸
Sの糸端側が引出されるようになると、これを糸通し検
知器27で検知することにより、自動糸通し処理を完了
させる。On the side of the yarn suction device 26, the yarn suction portion 26A
The needle thread S from the thread posture corrector 23 is sucked into the thread suction portion 26A through the needle hole of the sewing machine needle 5 by the negative pressure generated in the needle thread S, and the upper thread S inserted through the needle hole of the sewing machine needle 5 Is guided to the position of the pull-out portion 26B via the yarn suction portion 26A. Then, when the thread end side of the upper thread S is pulled out from the pull-out portion 26B of the thread suction device 26, this is detected by the threading detector 27, whereby the automatic threading process is completed.
【0075】次に、ミシン針5への糸通しが完了する
と、前記天秤用糸道形成部9、中継糸道形成部15およ
びミシン針用糸道形成部22に亘るエア供給等を停止す
る。そして、天秤用糸道12および中継糸道20の開放
操作をアクチュエータ14,21により行い、糸姿勢矯
正器23の前記ノズル状糸道を矯正シリンダ25で開放
する。そして、このときに進退機構28の揺動ブラケッ
ト30を図3に示す回動中心O−Oに沿って回動させる
ことによって、糸姿勢矯正器23と糸吸引器26からな
るミシン針用糸道形成部22を中継糸道形成部15と共
に図1に示す糸通し位置から矢示C方向へとヘッド部3
の固定端3A側に向けて退避させる。Next, when the threading to the sewing needle 5 is completed, the supply of air to the balance thread path forming section 9, the relay thread path forming section 15, and the sewing machine thread path forming section 22 is stopped. Then, the opening operation of the balance yarn path 12 and the relay yarn path 20 is performed by the actuators 14 and 21, and the nozzle-shaped yarn path of the yarn posture corrector 23 is opened by the correction cylinder 25. At this time, the swing bracket 30 of the advance / retreat mechanism 28 is rotated along the rotation center OO shown in FIG. The forming part 22 is moved together with the relay yarn path forming part 15 from the threading position shown in FIG.
To the fixed end 3A side.
【0076】この結果、ミシン針5への糸通し時に天秤
用糸道12、中継糸道20および糸姿勢矯正器23のノ
ズル状糸道内に導かれた上糸Sは、これらの糸道12,
20等からフリーな状態となって自動的に離脱されるよ
うになる。そして、中継糸道形成部15をミシン針用糸
道形成部22と共に図5、図6に示す退避位置まで後退
させるから、刺繍作業等を開始するときにミシン針5の
周囲から中継糸道形成部15やミシン針用糸道形成部2
2を大きく離し、ミシンの前側(矢示D方向)から見た
ミシン針5周囲の視界を広げることができる。As a result, at the time of threading the sewing machine needle 5, the upper thread S guided into the nozzle thread path of the balance thread path 12, the relay thread path 20, and the thread posture corrector 23 is disengaged from these thread paths 12,
It will be in a free state from 20 etc. and will be automatically removed. Since the relay thread path forming section 15 is retracted to the retracted position shown in FIGS. 5 and 6 together with the sewing thread path forming section 22, the relay thread path forming section is formed around the sewing needle 5 when starting embroidery work or the like. Section 15 and thread path forming section 2 for the sewing needle
2, the field of view around the sewing needle 5 viewed from the front side of the sewing machine (in the direction of arrow D) can be widened.
【0077】また、このときに布押え具35を揺動ブラ
ケット30を介して回動させることにより、進退機構2
8でミシン針用糸道形成部22と布押え具35とを連動
して回動できると共に、刺繍布の保持位置に布押え具3
5を自動的に配置でき、その後の刺繍作業に容易に対応
することができる。At this time, by rotating the cloth presser 35 through the swing bracket 30, the advance / retreat mechanism 2 is moved.
8, the sewing machine thread path forming section 22 and the cloth presser 35 can be rotated in conjunction with each other, and the cloth presser 3 is placed at the holding position of the embroidery cloth.
5 can be automatically arranged, and it is possible to easily cope with the subsequent embroidery work.
【0078】次に、この状態で糸さばきレバー48を糸
さばきモータ53により、円弧状のレバー用ガイド穴1
3Aに沿って下向きに下降(揺動)させ、糸さばきレバ
ー48の糸掛部57を天秤7から矢示A方向大きく離間
させる。そして、天秤用糸道形成部9の天秤用糸道12
等を開放した状態で、糸さばきレバー48の糸掛部57
を天秤7から大きく離間させることにより、曲線状の天
秤用糸道12等に沿ってたるみ状態にある上糸Sを、天
秤7の糸穴7Aと糸さばきレバー48の糸掛部57(接
点ばね60のリング部60A)との間で引っ張り、その
後の刺繍作業に先立って上糸Sのたるみを吸収しておく
ようにする。Next, in this state, the thread separating lever 48 is moved by the thread separating motor 53 into an arc-shaped lever guide hole 1.
It is lowered (oscillated) downward along 3A, and the thread catching portion 57 of the thread separating lever 48 is largely separated from the balance 7 in the direction of arrow A. Then, the balance thread path 12 of the balance thread path forming unit 9 is formed.
In the state in which the thread catching lever 48 is opened.
Is largely separated from the balance 7 so that the upper thread S, which is in a slack state along the curved thread path 12 for the balance, and the thread hole 7A of the balance 7 and the thread catching portion 57 of the thread separating lever 48 (contact spring). 60, so that the slack of the upper thread S is absorbed prior to the subsequent embroidery operation.
【0079】次に、刺繍作業を開始するときには前記主
軸モータおよび刺繍枠の枠移動機構等を刺繍データに基
づいて駆動し、ミシン針5を順次運針させることによっ
て刺繍柄を刺繍布に作成する。また、ミシン針5の運針
時には上糸Sが天秤用糸道12および中継糸道20等か
ら完全に離脱した状態となるから、上糸Sには天秤7の
揺動に応じて前記テンション台側の糸調子等により適正
な張力を付与でき、ミシン針5側に向けて低摩擦給糸す
ることができると共に、このときに上糸Sが天秤用糸道
12や中継糸道20等に引っ掛かったりするのを確実に
防止できる。Next, when starting the embroidery work, the spindle motor and the frame moving mechanism of the embroidery frame are driven based on the embroidery data, and the sewing needles 5 are sequentially moved to create an embroidery pattern on the embroidery cloth. When the sewing machine needle 5 moves, the upper thread S is completely separated from the balance thread path 12 and the relay thread path 20 and the like. A suitable tension can be applied by the thread tension of the sewing machine, and low friction yarn feeding can be performed toward the sewing machine needle 5. At this time, the upper thread S may be caught on the balance thread path 12, the relay thread path 20, or the like. Can be reliably prevented.
【0080】かくして、本実施例によれば、糸姿勢矯正
器23と糸吸引器26からなるミシン針用糸道形成部2
2を中継糸道形成部15と共に回動中心O−Oの位置で
ヘッド端部3Bに回動可能に連結し、これらを進退機構
28により回動させる構成としたから、ミシン針5への
糸通し時にはミシン針用糸道形成部22をミシン針5側
に進出させ、ミシン針5への糸通し作業を円滑に行うこ
とができる。Thus, according to the present embodiment, the thread path forming section 2 for the sewing needle, which includes the thread posture corrector 23 and the thread suction device 26,
2 is rotatably connected to the head end 3B at the position of the rotation center OO together with the relay yarn path forming portion 15, and these are rotated by the advance / retreat mechanism 28. At the time of threading, the thread path forming section 22 for the sewing machine needle is advanced toward the sewing machine needle 5 side, and the threading operation to the sewing machine needle 5 can be performed smoothly.
【0081】また、ミシン針5への糸通し後には進退機
構28でミシン針用糸道形成部22をヘッド部3の固定
端3A側へと図1中の矢示C方向に退避させることがで
き、刺繍作業時にオペレータ等はミシンの前側から刺繍
布上の縫い目等を広い視界をもって確認できる。After the thread has passed through the sewing machine needle 5, the sewing machine thread path forming portion 22 can be retracted in the direction of arrow C in FIG. During the embroidery operation, the operator or the like can check the seam or the like on the embroidery cloth from the front side of the sewing machine with a wide field of view.
【0082】さらに、進退機構28により布押え具35
をミシン針用糸道形成部22と共に回動させ、該ミシン
針用糸道形成部22がミシン針5側から退避するときに
布押え具35を刺繍布の保持位置に進出させる構成とし
ているから、ミシン針5への糸通し後には進退機構28
で布押え具35を刺繍布上へと自動的に配置でき、その
後の刺繍作業時に布押え具35により刺繍布を針板6と
の間で安定させて保持することができる。Further, the cloth presser 35 is moved by the advance / retreat mechanism 28.
Is rotated together with the thread path forming section 22 for the sewing machine needle, and when the thread path forming section 22 for the sewing machine retracts from the sewing needle 5 side, the cloth presser 35 is advanced to the holding position of the embroidery cloth. After the threading to the sewing machine needle 5, the advance / retreat mechanism 28
Thus, the cloth presser 35 can be automatically arranged on the embroidery cloth, and the embroidery cloth can be stably held with the needle plate 6 by the cloth presser 35 at the time of the subsequent embroidery operation.
【0083】そして、刺繍作業時には布押え具35のプ
レッサ43を電磁アクチュエータ41により、ミシン針
5の往復動に連動させて上下動させ、プレッサ43が刺
繍布上に持上げられたときに枠移動(布送り)を円滑に
行うことができる。また、刺繍布を刺繍枠等と共に交換
するときには、布押え具35の取付ブラケット37に対
してプレッサ43を図5中の矢示G方向に回動すること
により、プレッサ43の押圧部43Aを刺繍布から大き
く離間させた状態で枠交換等を容易に行うことができ
る。During the embroidery operation, the presser 43 of the cloth presser 35 is moved up and down by the electromagnetic actuator 41 in conjunction with the reciprocation of the sewing needle 5, and the frame is moved when the presser 43 is lifted on the embroidery cloth ( Cloth feeding) can be performed smoothly. When the embroidery cloth is replaced together with the embroidery frame or the like, the presser 43 is rotated in the direction indicated by the arrow G in FIG. Frame replacement and the like can be easily performed in a state of being largely separated from the cloth.
【0084】一方、ヘッド部3のヘッド端部3Bにはミ
シン針5への糸通し後に上糸Sのたるみを吸収する糸さ
ばきレバー48を設け、該糸さばきレバー48の先端側
にはリング部60A内に上糸Sが挿通される接点ばね6
0を設けると共に、糸さばきレバー48を糸さばき位置
に停止させるためのストッパ63には、刺繍作業時に接
点ばね60が接触,離間する導電性のばね受65を設
け、該ばね受65と接点ばね60とによって糸切れセン
サ69を構成するようにしたから、刺繍作業時に接点ば
ね60がばね受65に接触,離間を繰返す間は糸切れセ
ンサ69をスイッチング動作させることができ、上糸S
に糸切れが発生していないものとして検出できる。On the other hand, a thread separating lever 48 for absorbing the slack of the upper thread S after passing the thread through the sewing machine needle 5 is provided at the head end 3 B of the head section 3. Contact spring 6 through which upper thread S is inserted into 60A
0, and a stopper 63 for stopping the thread separating lever 48 at the thread separating position is provided with a conductive spring receiver 65 which contacts and separates the contact spring 60 during the embroidery operation. 60, the thread break sensor 69 can be switched while the contact spring 60 repeatedly contacts and separates from the spring receiver 65 during the embroidery operation.
Can be detected as having no thread breakage.
【0085】そして、この場合にはばねガイド61によ
り接点ばね60のリフト量Lを、例えば2mm程度に制
限できるから、糸切れセンサ69のスイッチング動作を
安定させることができ、糸切れ時の検出精度を確実に向
上できる。そして、刺繍作業の途中で糸切れが発生した
ときには、天秤7の揺動に応じた上糸Sの動きが止ま
り、接点ばね60の撓み変形が中断されるので、接点ば
ね60がばね受65に接触し続けるようになり、スイッ
チング動作の停止によって上糸Sの糸切れを正確に検出
することができる。In this case, the lift amount L of the contact spring 60 can be limited to, for example, about 2 mm by the spring guide 61, so that the switching operation of the thread break sensor 69 can be stabilized, and the detection accuracy at the time of thread break can be improved. Can be reliably improved. When a thread break occurs during the embroidery operation, the movement of the upper thread S in accordance with the swing of the balance 7 stops, and the bending deformation of the contact spring 60 is interrupted. Since the contact continues, the breaking of the upper thread S can be accurately detected by stopping the switching operation.
【0086】従って、本実施例によれば、ミシン針5へ
の自動糸通し後にミシン針5周囲の視界を広くし、例え
ば基台2上の刺繍布に形成している刺繍柄の縫い目等を
容易に確認することができると共に、刺繍柄等の作成作
業(ミシン作業)を円滑に行うことができ、作業性を大
幅に向上できる。Therefore, according to the present embodiment, the field of view around the sewing needle 5 is widened after the automatic threading to the sewing needle 5, and the stitches of the embroidery pattern formed on the embroidery cloth on the base 2, for example, are removed. In addition to being able to easily confirm, the work of creating an embroidery pattern or the like (sewing work) can be performed smoothly, and the workability can be greatly improved.
【0087】また、刺繍作業の途中で糸切れ等が発生し
ても、接点ばね60とばね受65とからなる糸切れセン
サ69により、上糸Sの糸切れ検知を高精度に安定して
行うことができ、糸切れセンサ69を糸さばきレバー4
8等を利用してコンパクトに構成することができる。Even if a thread break or the like occurs during the embroidery operation, the thread break of the upper thread S is detected stably with high accuracy by the thread break sensor 69 including the contact spring 60 and the spring receiver 65. And the thread break sensor 69 can be
8 etc. can be made compact.
【0088】なお、前記実施例では、布押え具35を構
成するプレッサ43の押圧部43Aに長円形状の針穴4
3Bを形成し、ミシン針5を針穴43Bに沿って揺動さ
せる横振りミシンとして構成した場合を例に挙げて説明
したが、本発明はこれに限るものではなく、例えばミシ
ン針5を上,下にのみ往復動させる通常のミシンの場合
には、図7中に一点鎖線で示すようにプレッサ43を細
長い形状とし、その先端側(下端側)の押圧部には円形
穴からなる針穴を形成するようにしてもよい。In the above-described embodiment, the oval needle hole 4 is formed in the pressing portion 43A of the presser 43 constituting the cloth presser 35.
3B, the sewing machine needle 5 has been described as an example of a horizontal swinging machine that swings along the needle hole 43B. However, the present invention is not limited to this. In the case of a normal sewing machine which reciprocates only downward, the presser 43 has an elongated shape as shown by a dashed line in FIG. May be formed.
【0089】また、前記実施例では、ミシン針5に対す
る糸通し後に糸吸引器26の糸吸引部26A等から上糸
Sが自動的に抜け出すものとして、糸吸引器26は糸姿
勢矯正器23のように2分割構造を採らない場合を例に
挙げて説明したが、これに替えて、例えば糸通し検知器
27側に糸掴み等を設ける構成とした場合には糸吸引器
26を2分割構造とするのがよい。In the above embodiment, it is assumed that the upper thread S automatically comes out of the thread suction section 26A or the like of the thread suction device 26 after threading the sewing machine needle 5, and the thread suction device 26 As described above, the case in which the two-piece structure is not adopted has been described as an example. Alternatively, for example, in a case where a thread gripper or the like is provided on the threading detector 27 side, the yarn suction device 26 may have the two-piece structure. It is good to do.
【0090】さらに、前記実施例では、自動糸通し装置
を単頭式の刺繍機に適用した場合を例に挙げて説明した
が、本発明はこれに限らず、例えば多頭式の刺繍機また
は通常の縫製機としての工業用ミシン等に適用してもよ
いものである。Further, in the above-described embodiment, the case where the automatic threading device is applied to a single-head type embroidery machine has been described as an example. However, the present invention is not limited to this. May be applied to an industrial sewing machine or the like as a sewing machine.
【0091】[0091]
【発明の効果】以上詳述した通り、請求項1に記載の発
明では、進退機構によりミシン針用糸道形成部をヘッド
部の先端側に回動可能に連結し、ミシン針への糸通し時
にはミシン針用糸道形成部を前記ミシン針側に進出さ
せ、糸通し後にはミシン針用糸道形成部を前記ヘッド部
の基端側方向へと退避させる構成としたから、ミシン針
への糸通し時に進退機構でミシン針用糸道形成部をミシ
ン針側に進出させることにより、前記ミシン針用糸道形
成部を用いてミシン針への糸通し作業を円滑に行うこと
ができる。そして、ミシン針への糸通し後には前記進退
機構でミシン針用糸道形成部をヘッド部の基端側へと退
避させることができ、ミシン針への自動糸通し後にミシ
ン針周囲の視界を広くし、縫製対象物の縫い目等を容易
に確認することができると共に、ミシン作業を円滑に行
うことができ、作業性を大幅に向上できる。As described above in detail, according to the first aspect of the present invention, the thread path forming portion for the sewing machine needle is rotatably connected to the leading end side of the head portion by the reciprocating mechanism, and the threading to the sewing machine needle is performed. Sometimes the thread path forming section for the sewing machine needle is advanced toward the sewing machine needle, and after the threading, the thread path forming section for the sewing machine is retracted toward the base end side of the head section. By making the thread path forming section for the sewing machine advance toward the sewing needle side by the advance / retreat mechanism at the time of threading, the threading operation to the sewing needle can be performed smoothly using the thread path forming section for the sewing needle. Then, after threading the sewing machine needle, the advance / retreat mechanism can retract the thread path forming portion for the sewing machine needle to the base end side of the head portion, and after the automatic threading to the sewing machine needle, the field of view around the sewing machine needle can be reduced. The sewing machine can be easily widened, the stitches of the sewing object can be easily checked, the sewing operation can be performed smoothly, and the workability can be greatly improved.
【0092】また、請求項2の発明では、ミシン針への
糸通し後にミシン針用糸道形成部をミシン針側から退避
させるときに、進退機構で布押え具を縫製対象物の保持
位置に自動的に進出させることができ、ミシン作業時に
布押え具により縫製対象物を基台との間で安定して保持
でき、これによっても、ミシン作業を円滑化し、作業性
を向上させることができる。According to the second aspect of the present invention, when the thread path forming portion for the sewing machine needle is retracted from the sewing machine needle side after threading the sewing machine needle, the cloth presser is moved to the holding position of the sewing object by the advance / retreat mechanism. The sewing machine can be automatically advanced, and the sewing object can be stably held between the base and the base by the cloth presser at the time of the sewing operation. This also facilitates the sewing operation and improves the workability. .
【0093】さらに、請求項3の発明では、ミシン作業
時に布押え具のアクチュエータにより、ミシン針の往復
動に連動させてプレッサを上下動でき、該プレッサが刺
繍対象物から上方に持上げられたときに布送り等を円滑
に行うことができる。また、縫製対象物を交換するとき
には、布押え具の取付ブラケットに対してホルダを回動
することにより、該ホルダと共にプレッサを上向きに回
動でき、該プレッサを縫製対象物から大きく離間させた
状態で縫製対象物の交換等を容易に行うことができる。Further, according to the third aspect of the present invention, the presser can be moved up and down in conjunction with the reciprocation of the sewing needle by the actuator of the cloth presser during the sewing operation, and when the presser is lifted upward from the embroidery object. In this way, the cloth can be fed smoothly. When the sewing object is replaced, the presser can be rotated upward together with the holder by rotating the holder with respect to the mounting bracket of the cloth presser, and the presser is largely separated from the sewing object. Thus, the replacement of the sewing object can be easily performed.
【0094】一方、請求項4の発明では、天秤への糸通
し時に糸さばきレバーを天秤に接近させ、天秤と共に糸
取りばねにも自動的に糸通しを行い、ミシン針への糸通
し後には糸さばきレバーを天秤から離間させる構成とし
ているから、天秤と糸取りばねとの間で糸を引張ること
により、例えば天秤からミシン針へと延びた糸のたるみ
を自動的に吸収でき、この状態でミシン作業を開始した
ときには天秤が上,下に揺動するに応じて糸に引張り力
を与えつつ、このときの糸の動きに追従して糸取りばね
を撓み変形させ、糸取りばねの変形量に応じた糸張力を
発生できる。On the other hand, according to the invention of claim 4, the thread separating lever is brought close to the balance when threading the thread to the balance, the thread is automatically threaded to the thread take-up spring together with the balance, and the thread is threaded to the sewing machine needle. Since the separating lever is separated from the balance, the slack of the thread extending from the balance to the sewing needle can be automatically absorbed by pulling the thread between the balance and the thread take-up spring. When the balance is started, a tension is applied to the thread as the balance swings up and down, and the thread take-up spring is flexed and deformed following the movement of the thread at this time, and the thread takes an amount corresponding to the amount of deformation of the thread take-up spring. Can generate tension.
【0095】また、請求項5の発明では、ヘッド部の先
端側に設けたばね受と糸取りばねとにより糸切れセンサ
を構成するようにしているから、ミシン作業を開始した
ときに天秤の揺動に応じて糸を引張ることにより、糸取
りばねを撓み変形させつつばね受に接離可能に当接さ
せ、糸切れセンサをスイッチング動作させることができ
る。そして、ミシン作業の途中で糸切れが発生すると、
天秤の揺動に応じた糸の動きが止まり、糸取りばねの撓
み変形が中断されるので、糸取りばねがばね受に接触し
続けるようになり、前記スイッチング動作の停止によっ
て糸切れを検知することができる。従って、ミシン作業
の途中で糸切れが発生しても、糸取りばねとばね受とか
らなる糸切れセンサにより、糸の糸切れ検知を高精度に
安定して行うことができ、糸切れセンサを糸さばきレバ
ー等を利用してコンパクトに構成することができる。According to the fifth aspect of the present invention, the thread break sensor is constituted by the spring receiver and the thread take-up spring provided on the front end side of the head portion, so that when the sewing machine operation starts, the balance swings. By pulling the thread accordingly, the thread take-up spring can be brought into contact with the spring receiver while being flexibly deformed, and the thread break sensor can be switched. And if a thread break occurs during the sewing operation,
Since the movement of the thread according to the swing of the balance stops and the bending deformation of the thread take-up spring is interrupted, the thread take-up spring keeps in contact with the spring receiver, and it is possible to detect the thread breakage by stopping the switching operation. it can. Therefore, even if a thread break occurs during the sewing operation, the thread break sensor including the thread take-up spring and the spring receiver can stably detect the thread break of the thread with high accuracy. It can be made compact by using a separating lever or the like.
【図1】本発明の実施例による刺繍機を示す一部破断の
正面図である。FIG. 1 is a partially cutaway front view showing an embroidery machine according to an embodiment of the present invention.
【図2】図1中の要部拡大図である。FIG. 2 is an enlarged view of a main part in FIG.
【図3】ヘッド端部および糸道形成機構等を示す図2の
左側面図である。FIG. 3 is a left side view of FIG. 2 showing a head end portion, a yarn path forming mechanism, and the like.
【図4】ヘッド端部および進退機構等を拡大して示す図
2の背面図である。FIG. 4 is an enlarged rear view of FIG. 2 showing a head end portion, an advance / retreat mechanism, and the like.
【図5】ミシン針用糸道形成部等を退避位置に回動させ
た状態を拡大して示す正面図である。FIG. 5 is an enlarged front view showing a state where a thread path forming portion for a sewing needle and the like are turned to a retracted position.
【図6】ミシン針用糸道形成部等を退避位置に回動させ
た状態を示す図5の背面図である。FIG. 6 is a rear view of FIG. 5 showing a state in which a thread path forming portion for a sewing needle and the like are turned to a retracted position.
【図7】図5中の布押え具を拡大して示す正面図であ
る。FIG. 7 is an enlarged front view showing the cloth presser in FIG. 5;
【図8】図7に示す布押え具の左側面図である。FIG. 8 is a left side view of the cloth presser shown in FIG. 7;
【図9】天秤用糸道形成部、糸さばきレバーの糸掛部お
よびストッパ等を拡大して示す縦断面図である。FIG. 9 is an enlarged longitudinal sectional view showing a thread path forming portion for a balance, a thread hooking portion of a thread separating lever, a stopper, and the like.
【図10】糸さばきレバーの接点ばねがばね受に接触し
た状態を示す糸切れセンサの正面図である。FIG. 10 is a front view of the thread break sensor showing a state in which a contact spring of the thread separating lever is in contact with a spring receiver.
【図11】図9中の矢示XI−XI方向からみた糸さばきレ
バー等の平面図である。11 is a plan view of the thread handling lever and the like as viewed from the direction indicated by arrows XI-XI in FIG. 9;
【図12】糸切れセンサを示す図10中の矢示 XII−XI
I 方向拡大断面図である。FIG. 12 shows an arrow XII-XI in FIG. 10 showing a thread break sensor.
FIG. 3 is an enlarged cross-sectional view in the I direction.
【図13】図10中の接点ばねを拡大して示す正面図で
ある。FIG. 13 is an enlarged front view showing a contact spring in FIG. 10;
【図14】図13に示す接点ばねの平面図である。FIG. 14 is a plan view of the contact spring shown in FIG.
1 ミシン本体 2 基台 3 ヘッド部 3A 固定端(ヘッド部の基端側) 3B ヘッド端部(ヘッド部の先端側) 5 ミシン針 7 天秤 8 糸道形成機構 9 天秤用糸道形成部 12 天秤用糸道 13 天秤用ガイド穴 13A レバー用ガイド穴 15 中継糸道形成部 16 揺動アーム 20 中継糸道 22 ミシン針用糸道形成部 23 糸姿勢矯正器 26 糸吸引器 27 糸通し検知器 28 進退機構 30 揺動ブラケット 31 ウォームギヤ 35 布押え具 37 取付ブラケット 38 ホルダ 38A 回動軸 40 可動子 41 電磁アクチュエータ 42 リンク 43 プレッサ 48 糸さばきレバー 52 回動中心 53 糸さばきモータ 54 ウォームギヤ 57 糸掛部 60 接点ばね(糸取りばね) 63 ストッパ 65 ばね受 69 糸切れセンサ S 上糸(糸) Reference Signs List 1 sewing machine main body 2 base 3 head 3A fixed end (base end of head) 3B head end (tip end of head) 5 sewing machine needle 7 balance 8 thread path forming mechanism 9 thread path forming section for balance 12 balance Thread path 13 Balance guide hole 13A Lever guide hole 15 Relay thread path forming part 16 Swing arm 20 Relay thread path 22 Sewing needle thread path forming part 23 Thread posture corrector 26 Thread suction device 27 Threading detector 28 Advancing / retracting mechanism 30 Swing bracket 31 Worm gear 35 Fabric holder 37 Mounting bracket 38 Holder 38A Rotating shaft 40 Mover 41 Electromagnetic actuator 42 Link 43 Presser 48 Thread separating lever 52 Rotating center 53 Thread separating motor 54 Worm gear 57 Threading section 60 Contact spring (thread take-up spring) 63 Stopper 65 Spring receiver 69 Thread break sensor S Upper thread (thread)
Claims (5)
して当該先端側に往復動するミシン針と揺動する天秤と
が設けられたヘッド部と、 前記天秤に対して糸を挿通するため該ヘッド部の先端側
に設けられた天秤用糸道形成部と、 該天秤用糸道形成部から導かれる糸を前記ミシン針に対
して挿通するためのミシン針用糸道形成部と、 該ミシン針用糸道形成部を前記ヘッド部の先端側に回動
可能に連結し、前記ミシン針への糸通し時には該ミシン
針用糸道形成部を前記ミシン針側に進出させ、糸通し後
には該ミシン針用糸道形成部を前記ヘッド部の基端側方
向へと退避させる進退機構とから構成してなるミシン。1. A sewing machine base, a sewing machine needle having a base end installed on the base, a front end extending on the base and reciprocating to the front end, and a swinging balance are provided. A head section, a thread path forming section for a balance provided on the distal end side of the head section for inserting a thread into the balance, and a thread guided from the thread path forming section for the balance to the sewing machine needle. A thread path forming portion for a sewing machine needle for inserting the thread path forming portion for the sewing machine, a rotatable connection of the thread path forming portion for the sewing machine needle to the distal end side of the head portion, and A reciprocating mechanism configured to advance a thread path forming portion toward the sewing machine needle side and retract the thread path forming portion for the sewing machine needle toward the base end side of the head after threading.
基台との間で縫製対象物を保持する布押え具を備え、前
記進退機構は該布押え具を前記ミシン針用糸道形成部と
共に回動させ、該ミシン針用糸道形成部がミシン針側か
ら退避するときに前記布押え具を縫製対象物の保持位置
に進出させる構成としてなる請求項1に記載のミシン。2. The sewing machine according to claim 1, further comprising a cloth presser for holding a sewing object between the sewing machine and the base when the sewing operation is performed by the sewing needle, wherein the advance / retreat mechanism rotates the cloth presser together with the sewing machine thread path forming unit. The sewing machine according to claim 1, wherein the sewing machine is configured to move the sewing machine so as to advance the cloth presser to a holding position of the sewing object when the sewing machine thread path forming unit is retracted from the sewing machine needle side.
に回動可能に取付けられ前記進退機構により回動される
取付ブラケットと、該取付ブラケットに回動可能に取付
けられたホルダと、該ホルダに対して上下動可能に設け
られた布押え用のプレッサと、該プレッサを上下動させ
るため前記ホルダに設けられたアクチュエータとからな
り、前記縫製対象物の交換時には前記プレッサをホルダ
と共に上向きに回動させる構成としてなる請求項2に記
載のミシン。3. A mounting bracket rotatably mounted on a tip end side of the head portion and rotatably mounted on the mounting bracket, wherein the holder includes a holder rotatably mounted on the mounting bracket. The presser comprises a presser for fabric presser provided to be vertically movable with respect to the holder, and an actuator provided to the holder to move the presser up and down. When exchanging the sewing object, the presser faces upward together with the holder. The sewing machine according to claim 2, wherein the sewing machine is configured to rotate the sewing machine.
針への糸通し後に糸のたるみを吸収するため前記天秤用
糸道形成部の途中位置で前記天秤に対して接近,離間す
る糸さばきレバーを設け、該糸さばきレバーの先端側に
は、前記天秤への糸通し時に該天秤に隣接した位置で糸
が挿通され、ミシン作業時には前記天秤から離間した位
置で糸の動きに追従して撓み変形する糸取りばねを設け
る構成としてなる請求項1,2または3に記載のミシ
ン。4. A thread which approaches and separates from the balance at an intermediate position of the thread path forming portion for the balance in order to absorb a slack of the thread after the thread has passed through the sewing machine needle. A separating lever is provided, and a thread is inserted at a position adjacent to the balance when the thread is passed through the balance at a tip side of the thread separating lever, and follows a movement of the thread at a position separated from the balance during sewing operation. The sewing machine according to claim 1, 2, or 3, wherein a thread take-up spring that is bent and deformed is provided.
針への糸通し後に前記糸さばきレバーを天秤から離間し
た位置に停止させるためのストッパと、ミシン作業時に
前記糸取りばねが接触,離間する導電性のばね受とを設
け、該ばね受は前記糸取りばねが接触,離間する毎にス
イッチング動作する糸切れセンサを前記糸取りばねと共
に構成してなる請求項4に記載のミシン。5. A stopper for stopping the thread separating lever at a position separated from the balance after threading the sewing machine needle at the tip end side of the head portion, and the thread take-up spring contacting and separating during sewing operation. 5. The sewing machine according to claim 4, further comprising: a conductive spring receiver which performs a switching operation each time the thread take-up spring comes into contact with or separates from the thread take-up spring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19646397A JP3737609B2 (en) | 1997-07-07 | 1997-07-07 | sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19646397A JP3737609B2 (en) | 1997-07-07 | 1997-07-07 | sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1119372A true JPH1119372A (en) | 1999-01-26 |
JP3737609B2 JP3737609B2 (en) | 2006-01-18 |
Family
ID=16358233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19646397A Expired - Lifetime JP3737609B2 (en) | 1997-07-07 | 1997-07-07 | sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3737609B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100639353B1 (en) | 2003-04-07 | 2006-10-27 | (주) 인브로 | sewing machine |
WO2016104118A1 (en) * | 2014-12-24 | 2016-06-30 | ブラザー工業株式会社 | Sewing machine |
-
1997
- 1997-07-07 JP JP19646397A patent/JP3737609B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100639353B1 (en) | 2003-04-07 | 2006-10-27 | (주) 인브로 | sewing machine |
WO2016104118A1 (en) * | 2014-12-24 | 2016-06-30 | ブラザー工業株式会社 | Sewing machine |
US10443169B2 (en) | 2014-12-24 | 2019-10-15 | Brother Kogyo Kabushiki Kaisha | Sewing machine |
Also Published As
Publication number | Publication date |
---|---|
JP3737609B2 (en) | 2006-01-18 |
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