JP3251638B2 - Thread lift prevention device for chain stitch machines - Google Patents

Thread lift prevention device for chain stitch machines

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Publication number
JP3251638B2
JP3251638B2 JP14298392A JP14298392A JP3251638B2 JP 3251638 B2 JP3251638 B2 JP 3251638B2 JP 14298392 A JP14298392 A JP 14298392A JP 14298392 A JP14298392 A JP 14298392A JP 3251638 B2 JP3251638 B2 JP 3251638B2
Authority
JP
Japan
Prior art keywords
thread
cloth
needle
sewing machine
sewing
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
JP14298392A
Other languages
Japanese (ja)
Other versions
JPH05329288A (en
Inventor
裕康 西山
和夫 元木
Original Assignee
ジューキ株式会社
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 ジューキ株式会社 filed Critical ジューキ株式会社
Priority to JP14298392A priority Critical patent/JP3251638B2/en
Publication of JPH05329288A publication Critical patent/JPH05329288A/en
Application granted granted Critical
Publication of JP3251638B2 publication Critical patent/JP3251638B2/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

【産業上の利用分野】この発明は、環縫いミシンによる
縫製動作終了後、針糸の切断端部を布から抜脱させた
際、縫い目側糸の切断端部が上方へ浮き上がったり抜脱
したりするのを防止する糸浮き防止装置に関するもので
ある。
BACKGROUND OF THE INVENTION The present invention relates to a sewing machine using a chain stitch sewing machine, in which when a cut end of a needle thread is pulled out of a cloth after a sewing operation is completed, a cut end of a stitch side thread rises up or comes out. The present invention relates to a yarn floating prevention device that prevents the occurrence of a floating.

【0001】[0001]

【従来の技術】ミシンベッド内に収納された糸切り機構
によって縫製動作終了後に糸の切断を行うようにした環
縫いミシンが従来より知られているが、この環縫いミシ
ンにおいては、図4に示すように、切断された針糸I1
の切断端部I1aが布Wに挿通された状態となるため、
そのままの状態では布Wが取り出しにくく、また取り出
された布Wに従って針糸I1が針糸供給源側から不要に
引き出されるという不都合が生じる。
2. Description of the Related Art A chain stitch sewing machine in which a thread is cut after a sewing operation is completed by a thread cutting mechanism housed in a sewing machine bed has been conventionally known. In this chain stitch sewing machine, FIG. As shown, the cut needle thread I1
Since the cut end I1a is inserted into the cloth W,
In this state, the cloth W is difficult to be taken out, and the needle thread I1 is unnecessarily pulled out from the needle thread supply source side according to the taken-out cloth W.

【0002】そこで、糸切り機構を備えた環縫いミシン
では、縫製動作終了後にミシンベッド上方で糸払い部材
1Aを往復動させ、その動作によって布Wから縫い針に
至る針糸I1の捕捉、引き出しを行い(図5参照)、針
糸I1の切断端部I1aを布の上方へ引き出して、布の
取り出しをスムーズに行い得るようにしている。
Therefore, in a chain stitch sewing machine provided with a thread cutting mechanism, the thread removing member 1A is reciprocated above the sewing machine bed after the sewing operation, and the needle thread I1 from the cloth W to the sewing needle is caught and pulled out by the operation. (See FIG. 5), the cut end I1a of the needle thread I1 is pulled out above the cloth so that the cloth can be taken out smoothly.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来の環縫いミシンにあっては、糸払い部材1Aによって
針糸I1を引き出した際、上方へ移動する針糸I1との
摩擦力によって縫い目終端部に連なる糸(縫い目側糸)
I2までもが上方へと引き上げられ、その切断端部I2
aが図5の一点鎖線にて示すように針糸I1と共に布か
ら抜脱したり、抜脱しないまでも縫い目Sが布Wの上方
に浮き上がり(図5の実線にて示す)、極めて布Wから
抜出し易い状態になるという問題が発生した。周知のよ
うに、環縫い目では、前後の縫い目を連鎖的に絡ませた
構造となっているため、上記のように切断端部が布から
抜脱して終端部の縫い目がほつれると、これに続く縫い
目が次々とほつれてしまい(図6参照)、縫合状態が完
全に解除されてしまう虞がある。この発明は、上記問題
点に着目してなされたもので、糸払い部材の動作によっ
て、縫い目終端部が浮き上がったり、抜脱したりするの
を完全に防止することができ、ほつれのない縫い目を形
成することができる環縫いミシンのほつれ防止装置の提
供を目的とする。
However, in the conventional chain stitch sewing machine described above, when the needle thread I1 is pulled out by the thread removing member 1A, the seam end portion is caused by a frictional force with the needle thread I1 moving upward. Thread (seam side thread)
I2 is also lifted upward, and its cut end I2
As shown by the one-dot chain line in FIG. 5, the seam S is pulled out of the cloth together with the needle thread I1 or even without being pulled out, the seam S rises above the cloth W (shown by the solid line in FIG. There was a problem that the state was easily removed. As is well known, the chain seam has a structure in which the front and rear seams are entangled in a chain, so if the cut end is pulled out of the cloth and the seam at the terminal end is frayed as described above, it follows. There is a possibility that the stitches are frayed one after another (see FIG. 6) and the stitching state is completely released. The present invention has been made in view of the above problems, and the operation of the thread removing member can completely prevent the end of the seam from being lifted or pulled out, thereby forming a seam without fraying. It is an object of the present invention to provide a chain stitch sewing machine capable of performing fraying.

【0004】[0004]

【課題を解決するための手段】この発明は、縫製動作終
了後に切断された針糸の切断端部を糸払い部材によって
布上方へ抜脱させるようにした環縫いミシンにおいて、
所定の駆動手段によりミシンベッド上方の所定の上昇位
置とミシンベッドにおける針落ち位置もしくはその近傍
に設定した下降位置との間を昇降する糸押え部材を備
え、前期駆動手段により、少なくとも縫製動作期間中前
期糸押え部材を上昇位置に保持させると共に、少なくと
も糸払い部材の針糸引き出し動作期間中前記糸押え部材
を下降位置へ保持させて布上面に表出する縫い目終端部
を押えるようにしたものである。
SUMMARY OF THE INVENTION The present invention relates to a chain stitch sewing machine in which a cut end of a needle thread cut after completion of a sewing operation is pulled out of a cloth by a thread removing member.
A thread presser member that moves up and down between a predetermined raising position above the sewing machine bed by a predetermined driving means and a needle drop position on the sewing machine bed or a lowering position set in the vicinity thereof; The thread holding member is held at the raised position, and the thread holding member is held at the lowered position at least during the needle thread pull-out operation of the thread wiper so as to press the end of the stitch exposed on the upper surface of the cloth. is there.

【0005】[0005]

【作用】この発明においては、糸切り動作後、糸払い部
材が針糸の引き出し動作を開始すると、これと同時また
はそれ以前に糸押え部材が駆動手段の作動によって上昇
位置から下降し、縫い目終端部を押さえるため、糸払い
部材によって針糸が布中を上昇しても、これに釣られて
縫い目側糸の切断端部が上方へ移動することはなく、布
からの抜脱することはない。
In the present invention, when the thread removing member starts the needle thread withdrawing operation after the thread trimming operation, the thread presser member is lowered from the raised position by the operation of the driving means at the same time or before that, and the stitch end Even if the needle thread rises in the cloth by the thread wiping member, the cut end of the seam-side thread does not move upward due to this and does not come off from the cloth. .

【0006】[0006]

【実施例】以下、この発明の一実施例を図1ないし図3
に基づき説明する。なお、各図中、上記従来技術と同一
部分には同一符号を付してある。図において、1は単糸
環縫いミシンのミシン頭部であり、その内部には、針棒
2を昇降させる針棒昇降機構などが収納されている。ま
た、3は前記ミシン頭部1の正面に突設されたシリンダ
支持板、4はこの支持板3の先端部に固定された駆動手
段としてのエアーシリンダである。このエアーシリンダ
4は、針落ち位置から斜め上方に向ってシリンダロッド
4aが移動するようになっており、その移動経路と縫い
針Nの昇降経路とが交差しないよう配慮されている。
1 to 3 show an embodiment of the present invention.
It will be described based on. In each of the drawings, the same reference numerals are given to the same parts as those in the above-mentioned conventional technology. In the drawing, reference numeral 1 denotes a sewing machine head of a single thread ring stitch sewing machine, in which a needle bar elevating mechanism for elevating and lowering a needle bar 2 and the like are housed. Reference numeral 3 denotes a cylinder support plate protruding from the front of the sewing machine head 1, and reference numeral 4 denotes an air cylinder as driving means fixed to the tip of the support plate 3. In the air cylinder 4, the cylinder rod 4a moves obliquely upward from the needle drop position, and care is taken so that the movement path does not intersect with the elevating path of the sewing needle N.

【0007】また、5は前記エアーシリンダ4における
シリンダロッド4aの下端部に固定した可撓性を有する
針金状の糸押え部材である。この糸押え部材5の下端に
は、図2に示すように水平な状態で屈曲した押圧部5a
が形成されており、この押圧部5aは、シリンダロッド
4aの没入時には糸押え部材5の通過経路より上方に設
定された上昇位置P2に保持され、シリンダロッド4a
の下降時には、前記上昇位置から針板の針落ち位置P近
傍の下降位置P1へと下降するようになっている。
Reference numeral 5 denotes a flexible wire holding member fixed to the lower end of the cylinder rod 4a of the air cylinder 4. At the lower end of the thread holding member 5, a pressing portion 5a bent in a horizontal state as shown in FIG.
The pressing portion 5a is held at an ascending position P2 set above the passage of the thread presser member 5 when the cylinder rod 4a enters, and the cylinder rod 4a
Is lowered from the raised position to the lowered position P1 near the needle drop position P of the needle plate.

【0008】次に上記構成に基づき作用を説明する。ミ
シンが初期状態及び縫製動作状態にあるとき、エアーシ
リンダ4のシリンダロッド4aは没入状態にあり、糸押
え部材は上昇位置に保持されている。ここで、縫製動作
が終了し、ミシンベッド内に収納された周知の糸切り機
構が縫い針Nから単糸環縫い目Sの終端部S1に至る針
糸I1を、図3に示すように布Wの下面で切断すると、
まず、エアーシリンダ4のシリンダロッド4aが突出し
て、糸押え部材5を下降させ、同部材5の押圧部5aに
よって布Wに形成された単糸環縫い目Sの終端部S1を
上方から押さえる。
Next, the operation based on the above configuration will be described. When the sewing machine is in the initial state and the sewing operation state, the cylinder rod 4a of the air cylinder 4 is in a retracted state, and the thread presser is held at the raised position. Here, the sewing operation is completed, and the well-known thread trimming mechanism housed in the sewing machine bed moves the needle thread I1 from the sewing needle N to the end portion S1 of the single thread ring seam S as shown in FIG. When cut at the bottom of the
First, the cylinder rod 4a of the air cylinder 4 protrudes, the thread presser member 5 is lowered, and the end portion S1 of the single thread ring seam S formed on the cloth W is pressed from above by the pressing portion 5a of the member 5.

【0009】この後、糸払い部材5が所定の初期位置か
ら往動を開始し、その往動経路中で針糸I1の捕捉・引
き出しを行う。この引き出し動作により針糸I1の切断
端部I1aは布Wの上方へと引き上げられ、布Wから抜
脱する。この際、針糸I1との摩擦によって、縫い目側
糸I2にはこれを上方へ引き上げようとする力が加わる
が、糸押え部材5によって縫い目側糸I2は布Wの上面
に押止された状態となっているため、上方への移動は阻
止される。従って、縫い目側糸I2の切断端部I2aが
布Wの上方に浮き上がったり、抜脱したりすることはな
くなり、ほつれのない良好な縫製品を得ることができ
る。
Thereafter, the thread sweeping member 5 starts a forward movement from a predetermined initial position, and captures and pulls out the needle thread I1 in the forward movement path. By this pull-out operation, the cut end I1a of the needle thread I1 is pulled up above the cloth W, and is pulled out of the cloth W. At this time, due to friction with the needle thread I1, a force for pulling up the seam side thread I2 is applied, but the seam side thread I2 is pressed against the upper surface of the cloth W by the thread pressing member 5. , The upward movement is prevented. Therefore, the cut end portion I2a of the seam side thread I2 does not rise above the cloth W or comes off, and a good sewing product without fraying can be obtained.

【0010】なお、上記実施例のように糸押え部材5に
よって針糸I1を押圧しないようにすることは、針糸I
1をスムーズに布Wから抜脱させる上で望ましいが、糸
押え部材5によって縫い目終端部S1と共に針糸I1を
押圧するようにするしても、その押圧力を適度なものに
設定れば、糸払い動作に悪影響を与えることなく、上記
実施例とほぼ同様の効果を得ることができる。
[0010] It should be noted that, as in the above embodiment, the needle thread I1 is not pressed by the thread pressing member 5 because the needle thread I1 is not pressed.
Although it is desirable to smoothly pull out the needle thread I1 from the cloth W, even if the thread holding member 5 presses the needle thread I1 together with the stitch end S1, if the pressing force is set to an appropriate value, Almost the same effects as in the above embodiment can be obtained without adversely affecting the thread removing operation.

【0011】また、環縫いミシンに設けられる糸払い部
材としては、復動時に針糸I1の引き出しを行うものも
あるが、そのような糸払い部材を用いた環縫いミシンに
あっても、糸押え部材5を少なくとも引き出し動作期間
中に下降させておけば良く、この発明は、いかなる動作
形式を取る糸払い部材にも対応可能である。さらに、上
記実施例では、糸押え部材を移動させる駆動手段として
エアーシリンダを用いたが、これに替えてソレノイド等
の他のアクチュエータを用いることも可能である。
[0011] As a thread remover provided in the chain stitch sewing machine, there is also a thread remover for pulling out the needle thread I1 at the time of backward movement. It is sufficient that the presser member 5 is lowered at least during the pulling-out operation, and the present invention can be applied to a thread removing member having any operation form. Further, in the above embodiment, the air cylinder is used as the driving means for moving the thread presser member, but another actuator such as a solenoid may be used instead.

【0012】さらにまた、この発明に係る糸浮き防止装
置は、単糸環縫いミシンに限らず、二重環縫いミシンな
どその他の環縫いミシンにも適用可能であり、この発明
は特に上記実施例に限定されるものではない。
Further, the thread lifting prevention device according to the present invention is not limited to a single thread stitch sewing machine, but is applicable to other chain stitch sewing machines such as a double chain stitch sewing machine. However, the present invention is not limited to this.

【0013】[0013]

【発明の効果】以上説明したとおり、この発明は、縫製
動作終了後に切断された針糸の切断端部を糸払い部材に
よって布から抜脱させるようにした環縫いミシンにおい
て、少なくとも前記糸払い部材が糸の引き出し動作を行
っている間、縫い目終端部を糸押え部材によって上方か
ら押さえるようにしたため、引き出される針糸との摩擦
によって縫い目糸にこれを上方へ引き上げようとする力
が加わったとしても、縫い目糸の切断端部が上方へ浮き
上がったり、布から抜脱したりすることはなくなり、ほ
つれのない良好な縫製品を得ることができる。
As described above, the present invention relates to a chain stitch sewing machine in which a cut end of a needle thread cut after completion of a sewing operation is pulled out of a cloth by a thread removing member. During the operation of pulling out the thread, the end of the seam is pressed from above by the thread presser member, so that a force is applied to pull the seam thread upward by friction with the needle thread to be pulled out. In addition, the cut end portion of the seam thread does not rise upward and does not come off the cloth, and a good sewing product without fraying can be obtained.

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

【図1】この発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.

【図2】図1に示した糸押え部材の拡大側面図である。FIG. 2 is an enlarged side view of the thread presser member shown in FIG.

【図3】図2に示したものの下降時の状態を示す説明拡
大正面図である。
FIG. 3 is an explanatory enlarged front view showing a state of the vehicle shown in FIG. 2 when it is lowered.

【図4】従来の単糸環縫いミシンにおいて糸の切断が行
われた状態を示す説明拡大正面図である。
FIG. 4 is an explanatory enlarged front view showing a state where a thread is cut in a conventional single thread ring stitch sewing machine.

【図5】図4に示した状態から糸払い部材が針糸を引き
出した状態を示す説明拡大側面図である。
5 is an explanatory enlarged side view showing a state in which the thread removing member has pulled out a needle thread from the state shown in FIG. 4;

【図6】単糸環縫い目がほつれる状態を示す説明拡大側
面図である。
FIG. 6 is an explanatory enlarged side view showing a state where a single thread ring seam is frayed;

【符号の説明】[Explanation of symbols]

W 布 N 縫い針 S 縫い目 S1 縫い目終端部 I1 針糸 1A 糸払い部材 I1a 切断端部 5 糸押え部材 4 エアーシリンダ(駆動手段) W Cloth N Sewing needle S Seam S1 Seam end I1 Needle thread 1A Threader I1a Cutting end 5 Thread presser 4 Air cylinder (drive means)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】縫製動作終了後、布から縫い針に至る糸を
布の下方で切断すると共に、布上方で移動する糸払い部
材によって縫い針から布上面に至る針糸の捕捉、引き出
しを行って布下方に位置する針糸の切断端部を布上方へ
抜脱させるようにした環縫いミシンにおいて、 所定の駆動手段によりミシンベッド上方の所定の上昇位
置とミシンベッドにおける針落ち位置もしくはその近傍
に設定した下降位置との間を昇降する糸押え部材を備え
てなり、前記 駆動手段は,少なくとも縫製動作期間中前記糸押さ
え部材を上昇位置に保持させるとともに,少なくとも糸
払い部材の針糸引き出し動作期間中前記糸押え部材を下
降位置へ保持させて布上面に表出する縫い目終端部を押
えるようにしたことを特徴とする環縫いミシンの糸浮き
防止装置。
After the sewing operation is completed, a thread from the cloth to the sewing needle is cut below the cloth, and a needle thread from the sewing needle to the upper surface of the cloth is picked up and pulled out by a thread wiper moving above the cloth. In a chain stitch sewing machine in which the cut end of a needle thread located below the cloth is pulled out above the cloth, a predetermined driving position above the sewing machine bed and a needle drop position on the sewing machine bed or near the predetermined position by a predetermined driving means be provided with a thread holding member for lifting between a lowered position set in, the drive means may be held in the raised position the yarn pressing member at least during the sewing operation period, the needle thread at least thread wiping member withdrawal operation yarn document retaining device chain stitch sewing machine, characterized in that it has to hold the seam end portion during the period to hold the yarn pressing member to the lowered position in which exposed the fabric top surface.
JP14298392A 1992-06-03 1992-06-03 Thread lift prevention device for chain stitch machines Expired - Fee Related JP3251638B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14298392A JP3251638B2 (en) 1992-06-03 1992-06-03 Thread lift prevention device for chain stitch machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14298392A JP3251638B2 (en) 1992-06-03 1992-06-03 Thread lift prevention device for chain stitch machines

Publications (2)

Publication Number Publication Date
JPH05329288A JPH05329288A (en) 1993-12-14
JP3251638B2 true JP3251638B2 (en) 2002-01-28

Family

ID=15328207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14298392A Expired - Fee Related JP3251638B2 (en) 1992-06-03 1992-06-03 Thread lift prevention device for chain stitch machines

Country Status (1)

Country Link
JP (1) JP3251638B2 (en)

Also Published As

Publication number Publication date
JPH05329288A (en) 1993-12-14

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