JP3246529B2 - Thread trimming sewing machine - Google Patents

Thread trimming sewing machine

Info

Publication number
JP3246529B2
JP3246529B2 JP01265093A JP1265093A JP3246529B2 JP 3246529 B2 JP3246529 B2 JP 3246529B2 JP 01265093 A JP01265093 A JP 01265093A JP 1265093 A JP1265093 A JP 1265093A JP 3246529 B2 JP3246529 B2 JP 3246529B2
Authority
JP
Japan
Prior art keywords
thread
tension
sewing machine
sewing
trimming
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.)
Expired - Fee Related
Application number
JP01265093A
Other languages
Japanese (ja)
Other versions
JPH06218171A (en
Inventor
口 文 夫 水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Aisin Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aisin Seiki Co Ltd, Aisin Corp filed Critical Aisin Seiki Co Ltd
Priority to JP01265093A priority Critical patent/JP3246529B2/en
Publication of JPH06218171A publication Critical patent/JPH06218171A/en
Application granted granted Critical
Publication of JP3246529B2 publication Critical patent/JP3246529B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は糸切りミシンに関し、詳
しくは縫製工程終了後あるいは縫製途中の縫い糸切断時
に、糸巻き源から所定量の縫い糸を引き出すことのでき
る手段を備えた糸切りミシンに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread trimming sewing machine, and more particularly to a thread trimming sewing machine provided with a means capable of pulling out a predetermined amount of sewing thread from a thread winding source at the end of a sewing process or when cutting a sewing thread during sewing. It is.

【0002】[0002]

【従来の技術】本発明にかかる従来技術として、特公昭
47−17583号公報に開示されるものが知られてい
る。この糸切りミシンは、糸切りの指示が入ると釜装置
の回りを可動刃が回転し、可動刃と対向する位置に配設
された固定刃とともに縫い糸を切断するというものであ
り、特にこの糸切りミシンでは、糸切り時に上糸が引っ
張られてミシン針から抜けるのを防ぐために、糸調子と
糸コマとの間に糸寄せ部材が配設されている。図5に示
すように、糸寄せ部材4はミシン機枠1上に回動可能に
配設されており、糸切りの指示が入ると回転し、糸コマ
からの上糸が掛け渡された三つ孔糸掛け3と糸調子2と
の間の上糸Tを引っ掛け、上糸Tを点線で示される状態
に繰り出す。また、このとき糸調子2の上糸Tに対する
張力は解除され、糸切り後の上糸Tを糸調子2の張力で
引っ張ってミシン針から引き抜かないようになってい
る。その後、糸寄せ部材4は再び元の位置に戻るが、上
糸Tは糸コマ(図示せず)から繰り出された分だけ弛緩
するため、糸切り時に上糸がミシン針に繰り出され、縫
い糸がミシン針から抜け出したりしないようになってい
る。
2. Description of the Related Art As a prior art relating to the present invention, one disclosed in Japanese Patent Publication No. 47-17585 is known. In this thread trimming sewing machine, when a thread trimming instruction is input, a movable blade rotates around a shuttle device and cuts a sewing thread together with a fixed blade disposed at a position facing the movable blade. In the trimming sewing machine, a thread pulling member is disposed between the thread tension and the thread top in order to prevent the upper thread from being pulled out of the sewing needle during thread trimming. As shown in FIG. 5, the thread pulling member 4 is rotatably disposed on the sewing machine frame 1. The thread pulling member 4 is rotated when a thread trimming instruction is input, and is rotated by the upper thread from the thread spool. The upper thread T is hooked between the two-hole thread hook 3 and the thread tension 2, and the upper thread T is fed out to a state shown by a dotted line. At this time, the tension on the upper thread T of the thread tension 2 is released, and the upper thread T after thread trimming is pulled by the tension of the thread tension 2 so as not to be pulled out from the sewing needle. Thereafter, the thread pulling member 4 returns to the original position again, but since the upper thread T is relaxed by the amount fed from the thread top (not shown), the upper thread is fed to the sewing machine needle at the time of thread trimming, and the sewing thread is released. It does not come off from the sewing needle.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、この糸
切りミシンでは、糸調子2と三つ孔糸掛け3との間で上
糸に弛みを設けており、また糸調子2は糸切り時には上
糸への張力が解除されているため、糸切りの際に上糸の
張力を調節するものがなく、糸の種類によって糸切り後
の上糸の残り長さにばらつきが生じてしまうという問題
があった。
However, in this thread trimming sewing machine, the upper thread is slackened between the thread tension 2 and the three-hole thread hook 3, and the thread tension 2 is not threaded when the thread is trimmed. Since the tension to the upper thread is released, there is no means to adjust the tension of the upper thread at the time of thread trimming, and the remaining length of the upper thread after thread trimming varies depending on the type of thread. Was.

【0004】そこで本発明は、糸切り後に、上糸がミシ
ン針から抜け去らないようにするとともに、ミシン針か
ら残る上糸の長さを一定にすることを技術的課題とす
る。
Accordingly, it is a technical object of the present invention to prevent the upper thread from coming off the sewing machine needle after thread trimming and to make the length of the upper thread remaining from the sewing machine needle constant.

【0005】[0005]

【発明の構成】Configuration of the Invention

【0006】[0006]

【課題を解決するための手段】本発明において、上記課
題を解決するために講じた技術的解決手段は、待機位置
より作動位置に回動して縫い糸を捕捉する捕捉部と該捕
捉部が捕捉した縫い糸を切断する刃部を有する糸切り手
段と、ミシン機枠に設けられ糸巻きから繰り出された上
糸に糸切り時に必要となる張力を与える補助糸調子と、
該補助糸調子を通った前記上糸が掛けられ前記補助糸調
子とともに前記上糸に所定の張力を与える糸調子と、該
糸調子に近接して設けられ縫製サイクル中の上糸のたる
みを吸収する糸取りバネと、前記糸切り手段による糸切
り時に前記糸調子が上糸に与える張力を解除する張力解
除手段と、前記ミシン機枠の上面で且つ前記補助糸調子
と前記糸巻きとの間に配設され、待機位置から作動位置
に移動して前記糸巻きから所定量の上糸を引き出し前記
糸切り時には待機位置に復帰して所定量の上糸のゆるめ
をつくる糸寄せ部材とを備えたことを特徴とする糸切り
ミシンである。
According to the present invention, there is provided a technical solution to solve the above-mentioned problem. The technical solution includes a capturing portion which rotates from a standby position to an operating position to capture the sewing thread, and the capturing portion captures the sewing thread. Thread trimming means having a blade portion for cutting the sewing thread, and an auxiliary thread tensioner which is provided on the sewing machine frame and applies tension necessary for thread trimming to the upper thread unwound from the bobbin,
A thread tension on which the upper thread passing through the auxiliary thread tension is applied to apply a predetermined tension to the upper thread together with the auxiliary thread tension, and a slack of the upper thread provided in close proximity to the thread tension during a sewing cycle A thread take-up spring, tension release means for releasing the tension applied to the upper thread by the thread tension when the thread is cut by the thread trimmer, and an upper surface of the sewing machine frame and between the auxiliary thread tension and the thread winding. A thread pulling member that moves from the standby position to the operating position, pulls out a predetermined amount of the upper thread from the thread winding, and returns to the standby position during the thread trimming to loosen the predetermined amount of the upper thread. It is a unique thread trimming sewing machine.

【0007】[0007]

【作用】縫製中、糸コマより繰り出される上糸には、補
助糸調子と糸調子によって適度な張力が与えられてい
る。縫製が終了して糸切りの指示が入ると、張力解除手
段によって糸調子が上糸にかけていた張力が解除され、
上糸には補助糸調子からのみ張力が加えられることにな
る。また、補助糸調子と糸コマとの間に配設された糸寄
せ部材が待機位置から作動位置に移動して、糸巻きから
所定量の上糸を引き出す。そして、糸切り時には待機位
置に戻って上糸に所定量のゆるみを作っている。こうし
て、糸切り手段の捕捉部が回動して縫い糸を捕捉すると
き、上糸も回動方向に引っ張られる。このとき、上糸に
は糸寄せ部材によるゆるめ分が供給されるが、供給され
る上糸には補助糸調子による糸切りに必要な張力が付加
される。また、補助糸調子によって糸の種類にてきした
張力を付加することが可能であるため、糸切り手段によ
る糸捕捉時に必要以上に上糸が繰り出されることはな
く、糸切り後、針に残る上糸の長さにバラツキが生じな
い。また、糸寄せ部材によって上糸に一定量のゆるみ分
が供給されるため、糸切り後、上糸が糸取りバネによっ
て引っ張られて、糸巻きより上糸が引き出される時の張
力の変動によりミシン針から抜け落ちたりしない。
During sewing, the upper thread unwound from the thread top is given an appropriate tension by the auxiliary thread tension and the thread tension. When sewing is completed and an instruction for thread trimming is input, the tension released from the tension applied to the upper thread by the tension releasing means is released.
The tension is applied to the upper thread only from the auxiliary thread tension. In addition, a thread pulling member disposed between the auxiliary thread tension and the thread spool moves from the standby position to the operating position, and draws a predetermined amount of the upper thread from the thread winding. At the time of thread trimming, the thread returns to the standby position to make a predetermined amount of slack in the upper thread. In this way, when the catching portion of the thread cutting means rotates to catch the sewing thread, the upper thread is also pulled in the rotating direction. At this time, the upper yarn is supplied with a loosened amount by the yarn pulling member, but the supplied upper yarn is subjected to a tension necessary for thread cutting by the auxiliary yarn tension. In addition, since the tension specified for the type of thread can be added by the auxiliary thread tension, the upper thread is not unnecessarily fed out at the time of catching the thread by the thread cutting means. There is no variation in yarn length. In addition, since a certain amount of slack is supplied to the upper thread by the thread pulling member, the upper thread is pulled by the thread take-up spring after thread trimming, and the tension of the upper thread is pulled out from the thread spool. Do not fall out.

【0008】[0008]

【実施例】本発明の一実施例を図1〜図4に基づいて説
明する。図1は本実施例の糸切りミシンの正面図を示
す。本実施例の糸切りミシン10は、ミシンベッド11
と、ミシンベッド11より起立して配設されるミシン機
枠12より構成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of the thread trimming sewing machine of the present embodiment. The thread trimming sewing machine 10 of the present embodiment includes a sewing machine bed 11.
And a sewing machine frame 12 provided standing upright from the sewing machine bed 11.

【0009】図1にてミシン機枠12の上面右側には、
糸コマ立て(図示せず)が配設されており、糸コマより
繰り出される上糸Tは、糸案内13に形成された2つの
孔を通って、ミシン機枠12の下方に延在するミシン頭
部14に導かれるようになっている。
In FIG. 1, on the upper right side of the sewing machine frame 12,
A needle thread stand (not shown) is provided, and an upper thread T unreeled from the thread threader passes through two holes formed in the thread guide 13 and extends below the sewing machine frame 12. It is led to the head 14.

【0010】ミシン頭部14には、上糸に後述する糸切
り時に必要となる張力を付加する補助糸調子15が配設
され、糸案内13に掛けられた上糸は、次にこの補助糸
調子15に掛けられるようになっている。補助糸調子1
5は2枚の調子皿15a、15b(図3)と調子皿15
a、15bを付勢する円錐バネ15cを有し、つまみ1
5dを回転させることで張力が調節できるようになって
いる。補助糸調子15は、後述する糸切り時に必要とな
る張力を上糸Tにかけるものである。
The sewing machine head 14 is provided with an auxiliary thread tensioner 15 for applying a necessary tension to the upper thread at the time of thread trimming, which will be described later. It can be applied to the tone 15. Auxiliary thread tension 1
5 is two tone plates 15a, 15b (FIG. 3) and a tone plate 15
a, which has a conical spring 15c for urging the
By rotating 5d, the tension can be adjusted. The auxiliary thread tensioner 15 applies a tension to the upper thread T necessary for thread trimming described later.

【0011】補助糸調子15を通った上糸Tは、糸掛け
19を経て補助糸調子15の下方に位置する糸調子16
に案内される。糸調子16は、縫製時に補助糸調子15
とともに上糸に所定の張力を与えるもので、2枚の調子
皿と調子皿を付勢する円錐バネ(ともに図示せず)を有
している。そして、この調子皿の間に上糸Tを挟んで上
糸の張力を調節するようになっている。また、ミシン機
枠12内には、糸調子16が上糸にかける張力を解除す
る張力解除手段が配設されており、後述する糸切り時に
はこの張力解除手段が作用して円錐バネを付勢して、2
枚の調子皿の付勢弾力を解除することにより、上糸Tへ
の張力付加を解除するようになっている。この張力解除
手段については、従来と同様のものを使用することがで
きるため、ここでは詳述を略す。
The upper thread T that has passed through the auxiliary thread tension 15 passes through the thread hook 19 and is positioned below the auxiliary thread tension 15.
Will be guided to. The thread tension 16 is the auxiliary thread tension 15 at the time of sewing.
It also applies a predetermined tension to the upper thread and has two tone plates and a conical spring (both not shown) for urging the tone plates. The tension of the upper thread is adjusted by sandwiching the upper thread T between the tone plates. Further, tension releasing means for releasing the tension applied to the upper thread by the thread tensioner 16 is provided in the sewing machine frame 12, and this tension releasing means acts at the time of thread trimming described later to bias the conical spring. Then 2
The tension applied to the upper thread T is released by releasing the urging elasticity of the tone trays. As the tension releasing means, the same means as in the related art can be used, and therefore, detailed description is omitted here.

【0012】糸調子16には、図示しないバネ手段によ
って付勢される糸取りバネ16aが配設されている。糸
取りバネ16aは、ミシンの縫製サイクル中に図示しな
い釜による糸引込み等で上糸Tに生じたたるみを吸収す
るために配設されている。
The thread tensioner 16 is provided with a thread take-up spring 16a which is urged by spring means (not shown). The thread take-up spring 16a is provided to absorb slack generated in the upper thread T due to thread pull-in by a hook (not shown) during a sewing cycle of the sewing machine.

【0013】上糸Tは、糸取りバネ16aより糸掛け曲
がり板20と糸掛け21を経て、ミシン針18の上下運
動に合わせて作動し縫い糸の引締め作用を行う天秤装置
17へと導かれ、さらに、糸掛け22、23を通ってミ
シン針18に導かれるようになっている。
The upper thread T is guided from the thread take-up spring 16a through the thread hook bending plate 20 and the thread hook 21 to the balance device 17 which operates in accordance with the vertical movement of the sewing machine needle 18 and tightens the sewing thread. The thread is guided to the sewing needle 18 through the thread hooks 22 and 23.

【0014】次に、本発明の特徴である糸寄せ部材30
について説明する。本実施例の糸寄せ部材30は糸案内
13と補助糸調子15の間に設けられており、補助糸調
子15に案内される前の上糸Tを緩めるものである。図
2、図3に示すように、ミシン機枠12の後方面にはベ
ース32が固定されており、このベース32にミシン機
枠12の後方面より略垂直に起立するブラケット33が
配設されている。ブラケット33の一方面(図2にて右
側)にはソレノイド31が固定され、ソレノイド31は
その駆動腕34をブラケット33の他方面に回動可能に
突出させている。さらに、駆動腕34には屈曲した作動
腕35が固定されており、作動腕35は駆動腕34より
斜め上方に立ち上がった後、さらにミシン機枠12の上
面に沿って手前側に向かって延在している。作動腕35
の先端には孔35bが設けられている。上糸Tは糸案内
13から穴35bを通り、補助糸調子15に掛け渡され
ている。待機位置にある作動腕35は、図3に実線で示
すように、作動腕35に下方に取付けられた当接部35
aとミシン機枠12上に配設された弾性部材36とが当
接した状態にある。
Next, the yarn pulling member 30 which is a feature of the present invention.
Will be described. The yarn pulling member 30 of the present embodiment is provided between the yarn guide 13 and the auxiliary yarn tension 15, and loosens the upper yarn T before being guided by the auxiliary yarn tension 15. As shown in FIGS. 2 and 3, a base 32 is fixed to a rear surface of the sewing machine frame 12, and a bracket 33 that stands substantially vertically from the rear surface of the sewing machine frame 12 is provided on the base 32. ing. A solenoid 31 is fixed to one surface (the right side in FIG. 2) of the bracket 33, and the solenoid 31 has a drive arm 34 protruding from the other surface of the bracket 33 so as to be rotatable. Further, a bent operation arm 35 is fixed to the drive arm 34. The operation arm 35 rises obliquely upward from the drive arm 34 and further extends toward the near side along the upper surface of the sewing machine frame 12. are doing. Operating arm 35
Is provided with a hole 35b at the tip of. The upper thread T passes from the thread guide 13 to the auxiliary thread tensioner 15 through the hole 35b. The operating arm 35 in the standby position is, as shown by a solid line in FIG. 3, a contact portion 35 attached to the operating arm 35 below.
a and the elastic member 36 arranged on the sewing machine frame 12 are in contact with each other.

【0015】また、ミシンベッド11下には、図示しな
い釜装置と糸切り装置が配設されている。糸切り装置
は、上糸T及び下糸を回動して捕捉する捕捉部と、捕捉
部が捕捉した縫い糸を切断する刃部を備えている。糸切
りの指示によって糸切りソレノイド(図示せず)が通電
されると、下軸の回転が駆動力伝達手段(図示せず)を
介して捕捉部に伝達され、捕捉部は釜装置周りを回転し
て糸を捕捉するようになっている。この糸切り装置の構
成については従来と同様の構成を用いることができるた
め、詳述を略す。
Below the sewing machine bed 11, a shuttle device and a thread cutting device (not shown) are provided. The thread trimming device includes a capturing section that rotates and captures the upper thread T and the lower thread, and a blade section that cuts the sewing thread captured by the capturing section. When a thread trimming solenoid (not shown) is energized in response to a thread trimming instruction, the rotation of the lower shaft is transmitted to the catching unit via the driving force transmitting means (not shown), and the catching unit rotates around the shuttle device. To catch the yarn. About the structure of this thread cutting device, since the same structure as the conventional one can be used, detailed description is omitted.

【0016】次に、本実施例の作用について、図4のタ
イミングチャートを参照して説明する。尚、本実施例で
は、糸切りの指示は縫製オンを指示するペダル(図示せ
ず)の踏み返しによって行われるようになっている。ま
た、糸切り装置の糸切りソレノイド及び糸寄せ部材30
のソレノイド31への通電のタイミングは、それぞれミ
シン針18の位置によって制御されるようになっている
が、このミシン針18の位置は、ミシン主軸とともに回
転するハンドホイールに配設されたマグネットと、ミシ
ン機枠12に配設される2つの位置センサーによって判
断されるようになっている。このマグネット及び位置セ
ンサーの構成についても、従来と同様のものを使用する
ことができるため、説明は省略する。
Next, the operation of the present embodiment will be described with reference to the timing chart of FIG. In the present embodiment, the instruction of thread trimming is performed by depressing a pedal (not shown) for instructing sewing on. Further, the thread cutting solenoid and the thread pulling member 30 of the thread cutting device are provided.
The timing of energizing the solenoid 31 is controlled by the position of the sewing machine needle 18, and the position of the sewing machine needle 18 is controlled by a magnet provided on a handwheel that rotates together with the main shaft of the sewing machine. The determination is made by two position sensors provided on the sewing machine frame 12. Regarding the configuration of the magnet and the position sensor, the same configuration as that of the related art can be used, and the description is omitted.

【0017】使用者が縫製作業を終了してペダルを踏み
返し、糸切りを指示すると、糸寄せ部材30のソレノイ
ド31には、ミシン針18の針位置が下停止位置から上
停止位置にくるのを待って通電が行われる。ソレノイド
31は駆動腕34を図3にて反時計方向に回転させ、作
動腕35を上方の二点鎖線位置(作動位置)に移動させ
る。これにより、上糸Tは糸案内13と補助糸調子15
の間で上方に引っ張られ、急速に糸コマより繰り出され
る。そして、ミシン針18が上停止位置から下停止位置
に移るとソレノイド31はオフされ、作動腕35は元の
待機位置に戻る。作動腕35によって繰り出された上糸
Tは補助糸調子15と糸調子13との間でゆるみとして
残る。
When the user finishes the sewing operation and depresses the pedal again to instruct thread trimming, the solenoid 31 of the thread pulling member 30 moves the needle position of the sewing machine needle 18 from the lower stop position to the upper stop position. The power is supplied after waiting. The solenoid 31 rotates the drive arm 34 in the counterclockwise direction in FIG. 3, and moves the operation arm 35 to the upper position indicated by the two-dot chain line (operation position). As a result, the upper thread T is moved from the thread guide 13 to the auxiliary thread tension 15.
Between the thread tops. When the sewing machine needle 18 moves from the upper stop position to the lower stop position, the solenoid 31 is turned off, and the operating arm 35 returns to the original standby position. The upper thread T fed out by the operating arm 35 remains loose between the auxiliary thread tension 15 and the thread tension 13.

【0018】また、ソレノイド31のオフと同時に糸切
りソレノイドがオンされ、糸切り動作が始まる。糸切り
ソレノイドへの通電によって、糸切り装置の捕捉部が釜
装置周りを回転して上糸T及び下糸を捕捉し、刃部とと
もに切断する。このとき、上糸Tは捕捉部の回転ととも
に引っ張られるが、糸調子16の張力が解除されている
ためミシン針18にスムーズに繰り出される。また、糸
調子16へは糸寄せ部材30が弛ませた上糸Tが供給さ
れるが、このとき補助糸調子15による張力が掛けられ
ながら供給される。従って、ミシン針18に必要以上に
上糸が繰り出されることはなく、糸切り後にミシン針1
8から残る上糸の長さにバラツキが生じないようになっ
ている。
At the same time as the solenoid 31 is turned off, the thread cutting solenoid is turned on, and the thread cutting operation starts. The energization of the thread cutting solenoid causes the catching section of the thread cutting device to rotate around the shuttle device to catch the upper thread T and the lower thread, and cut them together with the blade. At this time, the upper thread T is pulled with the rotation of the catching portion, but is smoothly fed to the sewing needle 18 because the tension of the thread tension 16 has been released. Further, the upper thread T loosened by the thread pulling member 30 is supplied to the thread tension 16, but at this time, the tension is supplied by the auxiliary thread tension 15 and supplied. Therefore, the upper thread is not unnecessarily fed out to the sewing needle 18, and the sewing needle 1 is not threaded after thread trimming.
The length of the upper thread remaining from 8 does not vary.

【0019】こうして、ミシン針18が再び上停止位置
に上がると、糸切りソレノイドへの通電がオフされて糸
切り装置の捕捉部が元の位置に復帰するとともに、糸調
子16の張力が復帰する。また、ミシン針18の運動も
停止して、糸切り動作が終了する。
In this way, when the sewing needle 18 is again raised to the upper stop position, the power to the thread cutting solenoid is turned off, the catching portion of the thread cutting device returns to the original position, and the tension of the thread tension 16 returns. . The movement of the sewing needle 18 also stops, and the thread trimming operation ends.

【0020】[0020]

【発明の効果】本発明によれば、糸切り手段による糸捕
捉時に補助糸調子によって上糸に張力がかけられるた
め、必要以上に上糸が繰り出されず、糸切り後、針に残
る上糸の長さにバラツキが生じない。また、糸切り時に
必要となる張力を、補助糸調子の調節で糸の種類別に加
えることができるため、常に糸切り後の上糸残り長さを
安定させることが可能となる。
According to the present invention, the upper thread is tensioned by the auxiliary thread tension at the time of catching the thread by the thread cutting means, so that the upper thread is not unnecessarily fed out, and the upper thread remaining on the needle after thread cutting is removed. There is no variation in length. Further, the tension required at the time of thread trimming can be added for each type of thread by adjusting the auxiliary thread tension, so that the remaining length of the upper thread after thread trimming can always be stabilized.

【0021】また、糸寄せ部材によって上糸に一定量の
ゆるみ分が供給されるため、糸切り次に糸巻きから上糸
が引き出される時の上糸の張力変動がないので、糸切り
後、針の残る上糸の長さが安定し、糸切り後、上糸が糸
取りバネによって引っ張られてミシン針から抜け落ちた
りしない。さらに、糸寄せ部材がミシン機枠の上面に配
設されており、糸寄せ部材が作動しても使用者の目の前
で作動しないため、煩わしさがない。
Further, since a certain amount of slack is supplied to the upper thread by the thread pulling member, the tension of the upper thread does not fluctuate when the upper thread is pulled out from the thread after the thread is trimmed. The remaining length of the upper thread is stabilized, and after thread trimming, the upper thread is not pulled off from the sewing machine needle by the thread take-up spring. Further, since the thread pulling member is disposed on the upper surface of the sewing machine frame and does not operate in front of the user even if the thread pulling member operates, there is no need for bothering.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例である糸切りミシンの正面図を
示す。
FIG. 1 is a front view of a thread trimming sewing machine according to an embodiment of the present invention.

【図2】本実施例の糸切りミシンの上面図を示す。FIG. 2 is a top view of the thread trimming sewing machine according to the present embodiment.

【図3】図1のA−A線に沿う断面図を示す。FIG. 3 is a sectional view taken along the line AA in FIG. 1;

【図4】本実施例の糸切りミシンにおける針位置と各ソ
レノイドのタイミングチャートを示す。
FIG. 4 is a timing chart of needle positions and respective solenoids in the thread trimming sewing machine according to the present embodiment.

【図5】従来の糸切りミシンの正面図を示す。FIG. 5 shows a front view of a conventional thread trimming sewing machine.

【符号の説明】[Explanation of symbols]

10 糸切りミシン 15 補助糸調子 16 糸調子 16a 糸取りバネ 30 糸寄せ部材 31 ソレノイド 35 作動腕 DESCRIPTION OF SYMBOLS 10 Thread trimming machine 15 Auxiliary thread tension 16 Thread tension 16a Thread take-up spring 30 Thread shift member 31 Solenoid 35 Operating arm

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 待機位置より作動位置に回動して縫い糸
を捕捉する捕捉部と該捕捉部が捕捉した縫い糸を切断す
る刃部を有する糸切り手段と、ミシン機枠に設けられ糸
巻きから繰り出された上糸に糸切り時に必要となる張力
を与える補助糸調子と、該補助糸調子を通った前記上糸
が掛けられ前記補助糸調子とともに前記上糸に所定の張
力を与える糸調子と、該糸調子に近接して設けられ縫製
サイクル中の上糸のたるみを吸収する糸取りバネと、前
記糸切り手段による糸切り時に前記糸調子が上糸に与え
る張力を解除する張力解除手段と、前記ミシン機枠の上
面で且つ前記補助糸調子と前記糸巻きとの間に配設さ
れ、待機位置から作動位置に移動して前記糸巻きから所
定量の上糸を引き出し前記糸切り時には待機位置に復帰
して所定量の上糸のゆるめをつくる糸寄せ部材とを備え
たことを特徴とする糸切りミシン。
1. A threading means having a catching portion for rotating a standby position to an operating position and catching a sewing thread, a blade portion for cutting the sewing thread captured by the catching portion, and being provided on a sewing machine frame and being unwound from a thread spool. An auxiliary thread tension for applying a tension necessary for thread trimming to the obtained upper thread, and a thread tension for applying a predetermined tension to the upper thread together with the auxiliary thread tension, wherein the upper thread passing through the auxiliary thread tension is hung; A thread take-up spring provided in close proximity to the thread tension to absorb slack of the upper thread during a sewing cycle; tension release means for releasing tension applied to the upper thread by the thread tension during thread trimming by the thread trimmer; It is disposed on the upper surface of the sewing machine frame and between the auxiliary thread tension and the bobbin, moves from a standby position to an operating position, pulls out a predetermined amount of upper thread from the bobbin, and returns to a standby position at the time of the thread trimming. The specified amount of needle thread A thread trimming sewing machine, comprising: a thread pulling member for making lugs.
JP01265093A 1993-01-28 1993-01-28 Thread trimming sewing machine Expired - Fee Related JP3246529B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP01265093A JP3246529B2 (en) 1993-01-28 1993-01-28 Thread trimming sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01265093A JP3246529B2 (en) 1993-01-28 1993-01-28 Thread trimming sewing machine

Publications (2)

Publication Number Publication Date
JPH06218171A JPH06218171A (en) 1994-08-09
JP3246529B2 true JP3246529B2 (en) 2002-01-15

Family

ID=11811247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01265093A Expired - Fee Related JP3246529B2 (en) 1993-01-28 1993-01-28 Thread trimming sewing machine

Country Status (1)

Country Link
JP (1) JP3246529B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4903316B2 (en) * 2000-05-29 2012-03-28 Juki株式会社 sewing machine
JP4678961B2 (en) * 2001-02-13 2011-04-27 Juki株式会社 Upper thread clamp device of sewing machine
CN108130661A (en) * 2017-12-26 2018-06-08 方琳 The control method of section line apparatus, sewing machine and sewing machine

Also Published As

Publication number Publication date
JPH06218171A (en) 1994-08-09

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