JPH08266766A - Needle thread take-up of double chain stitch sewing machine - Google Patents

Needle thread take-up of double chain stitch sewing machine

Info

Publication number
JPH08266766A
JPH08266766A JP7297295A JP7297295A JPH08266766A JP H08266766 A JPH08266766 A JP H08266766A JP 7297295 A JP7297295 A JP 7297295A JP 7297295 A JP7297295 A JP 7297295A JP H08266766 A JPH08266766 A JP H08266766A
Authority
JP
Japan
Prior art keywords
needle
needle thread
thread
balance
sewing machine
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
Application number
JP7297295A
Other languages
Japanese (ja)
Other versions
JP3559610B2 (en
Inventor
Yoshiaki Tamagawa
芳明 玉川
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.)
Juki Corp
Original Assignee
Juki 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 Juki Corp filed Critical Juki Corp
Priority to JP07297295A priority Critical patent/JP3559610B2/en
Publication of JPH08266766A publication Critical patent/JPH08266766A/en
Application granted granted Critical
Publication of JP3559610B2 publication Critical patent/JP3559610B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Sewing Machines And Sewing (AREA)

Abstract

PURPOSE: To provide a needle thread take-up of a double chain stitch sewing machine not generating a skip stitch even in a thick product to be sewn. CONSTITUTION: In the needle thread take-up of a double chain stitch sewing machine equipped with a needle holder 4 moved up and down in synchronous relation to the main shaft of a sewing machine, two take-up guides 17, 18 fixed to the arm 3 of the sewing machine and the needle thread take-up fixed to the needle holder and movable up down between the take-up guides, the needle thread take-up 24 is provided with a needle thread contact part 36A and an elastic means pressurizing the needle thread upwardly only when the needle thread contact part is positioned above the take-up guides.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は二重環縫いミシンの針糸
天秤に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle thread balance for a double chain stitch sewing machine.

【0002】[0002]

【従来の技術】二重環縫いを行うことができるロックミ
シンは従来から知られている。図13はこのようなロッ
クミシンの従来例の正面図を示す。図において、ロック
ミシン1はベッド2とアーム3を有し、アーム3には針
棒4が取り付られ、ベッド2内には前後及び左右動可能
なルーパ5が設けられている。また、ベッド2の上面に
は針板6が固定され、アーム3には糸調子器7が取り付
けられている。この糸調子器7には糸取りばね8が設け
られている。糸取りばね8は針糸9へ張力を与えるため
のものである。なお、10は被縫製布である。
2. Description of the Related Art A lock sewing machine capable of performing double chain stitch is conventionally known. FIG. 13 shows a front view of a conventional example of such a lock sewing machine. In the figure, a lock sewing machine 1 has a bed 2 and an arm 3, a needle bar 4 is attached to the arm 3, and a looper 5 that can move back and forth and left and right is provided in the bed 2. A needle plate 6 is fixed to the upper surface of the bed 2, and a thread tensioner 7 is attached to the arm 3. The thread tension regulator 7 is provided with a thread take-up spring 8. The thread take-up spring 8 is for giving tension to the needle thread 9. In addition, 10 is a cloth to be sewn.

【0003】針棒4の下方に針留め11が固定され、こ
の針留め11に針12が取り付けられている。また、ア
ーム3内において針棒4に固定された天秤固定部材13
へ針糸天秤14が固定されている。この天秤固定部材1
3あるいは針棒4は図示しない上下動機構により上下動
可能にされている。従って、針糸天秤14は針棒4と共
に上下動する。
A needle clamp 11 is fixed below the needle bar 4, and a needle 12 is attached to the needle clamp 11. Further, the balance fixing member 13 fixed to the needle bar 4 in the arm 3
The needle thread balance 14 is fixed. This balance fixing member 1
3 or the needle bar 4 can be moved up and down by a vertical movement mechanism (not shown). Therefore, the needle thread balance 14 moves up and down together with the needle bar 4.

【0004】図14は針糸天秤14を示し、(a)は側
面図、(b)は正面図である。これらの図に示すように
針糸天秤14は上端部には凹部14aが設けられ、ねじ
15によって天秤固定部材13へ固定されている。この
針糸天秤14はアーム3に形成された長孔16から前方
へ突出するように取り付けられる。
FIG. 14 shows a needle thread balance 14, (a) is a side view and (b) is a front view. As shown in these figures, the needle thread balance 14 is provided with a recess 14a at its upper end and is fixed to the thread balance fixing member 13 by a screw 15. The needle thread balance 14 is attached so as to project forward from a long hole 16 formed in the arm 3.

【0005】アーム3には長孔16の左右両側において
天秤ガイド17,18が設けられている。この天秤ガイ
ド17,18の他、アーム3には糸調子器7と天秤ガイ
ド17の間及び天秤ガイド18と針留め11の間にそれ
ぞれ糸ガイド19,20が設けられ、糸ガイド20と針
穴12aの間の針留め11には糸ガイド21が設けられ
ている。図示しない針糸ゴマからの針糸9が糸調子器
7、糸取りばね8,糸ガイド19,天秤ガイド17を経
由して針糸天秤14の凹部14aを通り、更に天秤ガイ
ド18、糸ガイド20,21を経由して針12の針穴1
2aへ通される。
The arm 3 is provided with balance guides 17 and 18 on both left and right sides of the elongated hole 16. In addition to the balance guides 17 and 18, the arm 3 is provided with thread guides 19 and 20 between the thread tensioner 7 and the balance guide 17 and between the balance guide 18 and the needle clamp 11, respectively. A thread guide 21 is provided on the needle clamp 11 between 12a. The needle thread 9 from the needle thread sesame (not shown) passes through the thread tension device 7, the thread take-up spring 8, the thread guide 19, and the thread guide 17 through the recess 14a of the needle thread balance 14, and further, the thread balance guide 18, the thread guide 20, Needle hole 1 of needle 12 via 21
2a.

【0006】図13は針棒4が上死点にある状態を示し
てあり、このときルーパ5は針糸9のループ9a内を通
って図の右方に前進している。
FIG. 13 shows the state in which the needle bar 4 is at the top dead center, and at this time, the looper 5 passes through the loop 9a of the needle thread 9 and advances to the right in the figure.

【0007】図15は針棒4が上死点から降下しつつあ
る状態を示す図13と同様な図であり、図16は図15
の状態での針12、針糸9、ルーパ5及びルーパ糸22
のみを示した上面図である。この状態ではルーパ5は図
の左方向へ後退し始めており、図16に示すように、こ
の後退運動と共にミシンの前方へ移動しながら針糸9、
ルーパ糸22及びルーパ5によって形成される三角形を
広げてゆく。針12はこの三角形の中にが降下する。
FIG. 15 is a view similar to FIG. 13 showing a state where the needle bar 4 is descending from the top dead center, and FIG. 16 is shown in FIG.
Needle 12, needle thread 9, looper 5 and looper thread 22 in the state of
It is the top view which showed only. In this state, the looper 5 has begun to retreat to the left in the figure, and as shown in FIG.
The triangle formed by the looper thread 22 and the looper 5 is expanded. The needle 12 descends into this triangle.

【0008】ところでこの状態のときに針糸9の張力が
減少すると、ルーパ5の後退に伴い、ルーパ5と針糸9
の間の摩擦抵抗が減少して、針糸9の下端が図16の左
方へ移動しにくくなり、その結果、同図へ一点鎖線で示
したようになって上記三角形が小さくなり、針12が三
角形の中に降下できない事態が生じるおそれがある。こ
のため、上記の糸取りばね8が設けられているのであ
り、糸取りばね8の作用により、針糸9に張力が与えら
れる。従って針糸9とルーパ5の間に摩擦抵抗が生じる
ので、針糸9はルーパ5と共に図15及び図16の左方
へ移動する。
When the tension of the needle thread 9 decreases in this state, the looper 5 and the needle thread 9 are retracted as the looper 5 retracts.
The frictional resistance between the needle threads 9 decreases, and the lower end of the needle thread 9 is less likely to move to the left in FIG. 16. As a result, the triangle becomes smaller as shown by the dashed line in FIG. There is a possibility that there will be a situation in which you cannot descend into the triangle. Therefore, the thread take-up spring 8 is provided, and the needle thread 9 is tensioned by the action of the thread take-up spring 8. Therefore, frictional resistance is generated between the needle thread 9 and the looper 5, and the needle thread 9 moves to the left in FIGS. 15 and 16 together with the looper 5.

【0009】図17は針棒4が下死点にある状態を示す
正面図である。この状態ではルーパ5は後退しており、
図13及び図15の状態のときに通っていた針糸9のル
ープ9aは既に被縫製布10に縫い込まれて縫目を形成
しており、ルーパ5から離れている。この状態から針棒
4が上昇するに伴い針糸9のループ9bが新たに形成さ
れ、ルーパ5が前進してこのループ9b内を通る。
FIG. 17 is a front view showing a state in which the needle bar 4 is at the bottom dead center. In this state, the looper 5 is retracted,
The loop 9a of the needle thread 9 that has passed through the state of FIGS. 13 and 15 has already been sewn into the cloth 10 to be sewn to form a stitch, and is separated from the looper 5. As the needle bar 4 rises from this state, a loop 9b of the needle thread 9 is newly formed, and the looper 5 advances to pass through the loop 9b.

【0010】[0010]

【発明が解決しようとする課題】しかしながら、上記の
従来技術においては糸取りばね8が常に作用して針糸9
へ張力を与えている。即ち、針棒4が下死点の位置にあ
るときにも糸取りばね8により針糸9へ張力が与えられ
ている。このため、針糸9のループ9aを吸収して該ル
ープ9aが小さくなる。従って、ルーパ5が新たに形成
されるループ9bを通過できず、被縫製品に目飛びが生
じることがある。特に厚物の被縫製品の場合は目飛びが
生じやすい。針糸9のループ9aが小さくてもルーパ5
が通過できるように図18に示すようにえぐり23aを
大きくした針23を用いることができるが、このように
えぐりを大きくした針で且つ必要な強度を有するものは
高価である。
However, in the above-mentioned prior art, the thread take-up spring 8 always acts to cause the needle thread 9 to move.
Is giving tension to. That is, the tension is applied to the needle thread 9 by the thread take-up spring 8 even when the needle bar 4 is at the bottom dead center position. Therefore, the loop 9a of the needle thread 9 is absorbed and the loop 9a becomes smaller. Therefore, the looper 5 cannot pass through the newly formed loop 9b, and stitch skipping may occur in the product to be sewn. Especially in the case of a thick sewn product, skipping tends to occur. Even if the loop 9a of the needle thread 9 is small, the looper 5
As shown in FIG. 18, it is possible to use a needle 23 having a large cutout 23a so that the needle can pass therethrough, but such a needle having a large cutout and having the necessary strength is expensive.

【0011】本発明の目的は、厚物の被縫製品であって
も目飛びが生じない二重環縫いミシンの針糸天秤を提供
することにある。
An object of the present invention is to provide a needle thread balance of a double chain stitch sewing machine in which stitch skipping does not occur even with a thick sewn product.

【0012】[0012]

【課題を解決するための手段】上記目的を達成するため
に、本発明によれば、ミシン主軸に同期して上下動する
針保持体と、ミシンアームに固定された2つの天秤ガイ
ドと、針保持体に固定され、且つ天秤ガイドの間を上下
動可能な針糸天秤と、を備えた二重環縫いミシンの針糸
天秤において、針糸天秤は、針糸と当接可能な針糸当接
部と、針糸当接部が天秤ガイドの上方に位置するときに
のみ針糸を上方へ加圧する弾性手段と、を有することを
特徴とする二重環縫いミシンの針糸天秤が提供される。
In order to achieve the above object, according to the present invention, a needle holder that moves up and down in synchronization with the main shaft of a sewing machine, two balance guides fixed to a sewing machine arm, and a needle. A needle thread balance of a double chain stitch sewing machine having a needle thread balance fixed to a holding body and capable of moving up and down between the balance guides. A needle thread balance for a double chain stitch sewing machine, characterized in that it has a contact portion and elastic means for pressing the needle thread upward only when the needle thread contact portion is located above the balance guide. It

【0013】[0013]

【作用】64-70針保持体の上下動に伴い、針糸天秤の針
糸当接部が天秤ガイドに対して上下動する。針糸当接部
が天秤ガイドの下方に位置するときは、弾性手段による
加圧力が針糸へ作用せず、針糸当接部が天秤ガイドの上
方に位置するときは、弾性手段による加圧力が針糸へ作
用する。
[Function] With the vertical movement of the 64-70 needle holder, the needle thread contact portion of the needle thread balance moves up and down with respect to the thread guide. When the needle thread contact portion is located below the balance guide, the pressure applied by the elastic means does not act on the needle thread, and when the needle thread contact portion is located above the balance guide, the elastic force is applied by the elastic means. Acts on the needle thread.

【0014】[0014]

【実施例】以下、図面に基づいて本発明の実施例を説明
する。図1は本発明による二重環縫いミシンの針糸天秤
をインターロックミシンに適用した第1の実施例を示し
(a)は側面図、(b)は正面図である。図2は図1の
実施例の分解斜視図である。
Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a first embodiment in which a needle thread balance for a double chain stitch sewing machine according to the present invention is applied to an interlock sewing machine. FIG. 1A is a side view and FIG. 1B is a front view. FIG. 2 is an exploded perspective view of the embodiment shown in FIG.

【0015】これらの図において、針糸天秤24は二重
環針糸天秤25とロック針糸天秤26とを有する。ロッ
ク針糸天秤26は2つの小さな穴27,27と大きな穴
28を形成され、大きな穴28へ通すネジ29等により
針棒4に固定された天秤固定部材13へ固定される。
In these drawings, the needle thread balance 24 has a double ring needle thread balance 25 and a lock needle thread balance 26. The lock needle thread balance 26 is formed with two small holes 27, 27 and a large hole 28, and is fixed to the balance fixing member 13 fixed to the needle bar 4 by a screw 29 or the like that passes through the large hole 28.

【0016】このロック針糸天秤26はロック針糸のた
めの天秤であり、その斜面26aを用いて図示しないロ
ック針糸の吸収及び繰り出しを行うものであるが、本発
明の趣旨とは無関係であるのでその詳細な説明は省略す
る。
The lock needle thread balance 26 is a balance for the lock needle thread, and the slope 26a is used for absorbing and feeding out the lock needle thread (not shown), but it has nothing to do with the gist of the present invention. Therefore, detailed description thereof will be omitted.

【0017】なお、本実施例に適用されるミシンの構成
は糸調子器7へ取り付けられる糸取りばね8を用いない
ことと針糸天秤24の構造が図13に示したミシンと異
なるのみで、その他の構成部分については同様であり、
例えばアーム3に固定された天秤ガイド17,18の間
に配置され、アーム3に形成された長孔16から前方へ
突出して設けられる。その他の同様な部分についてはそ
の説明を省略する。
The construction of the sewing machine applied to this embodiment is different from that of the sewing machine shown in FIG. 13 except that the thread take-up spring 8 attached to the thread tension regulator 7 is not used and the structure of the needle thread balance 24 is different. The same applies to the constituent parts of
For example, it is arranged between the balance guides 17 and 18 fixed to the arm 3, and is provided so as to project forward from the elongated hole 16 formed in the arm 3. Descriptions of other similar portions are omitted.

【0018】二重環針糸天秤25は薄板状の板金を折り
曲げて二つ折りとし、ロック針糸天秤26を挿入するた
めの空間31を形成したもので、ロック針糸天秤26の
穴27,27と対応して穴32,32が形成されてい
る。ロック針糸天秤26と二重環針糸天秤25とは、こ
れらの穴27,27及び穴32,32へリベット33,
33を挿通し、該リベット33,33の先端をかしめる
ことによって一体的に固定されている。
The double ring needle thread balance 25 is formed by bending a thin metal plate into two and forming a space 31 into which the lock needle thread balance 26 is inserted. The holes 27 and 27 of the lock needle thread balance 26 are formed. Corresponding to the holes 32, 32 are formed. The lock needle thread balance 26 and the double ring needle thread balance 25 are attached to the holes 27, 27 and the holes 32, 32 with rivets 33,
The rivets 33, 33 are inserted and the rivets 33, 33 are integrally fixed by caulking the tips thereof.

【0019】二重環針糸天秤25の上方部分に二又部3
4を構成する2つの突出部34A,34Bが設けられて
おり、両突出部34A,34Bの間へ針糸を通す。二又
部34の近くに穴35が形成されており、この穴35へ
ねじりコイルばね(糸取りばね)36を嵌挿したリベッ
ト37が通され、該リベット37の先端は二重環針糸天
秤25へかしめ固定されている。糸取りばね36の一端
は二重環針糸天秤25の小孔39へ通され、他端は突出
部34Bを通り、突出部34Aの上端へ当接している。
この糸取りばね36は先端部付近に凹部36Aが形成さ
れており、後述するように、この凹部36Aが二又部3
4の両突出部34A,34Bの間にて針糸と当接するこ
とによって針糸に張力を与える。
The forked portion 3 is provided on the upper portion of the double ring needle thread balance 25.
Two protrusions 34A and 34B forming part 4 are provided, and the needle thread is passed between both protrusions 34A and 34B. A hole 35 is formed near the bifurcated portion 34, and a rivet 37 having a torsion coil spring (thread take-up spring) 36 fitted therein is passed through the hole 35, and the tip of the rivet 37 has a double ring needle thread balance 25. It is fixed by crimping. One end of the thread take-up spring 36 is passed through the small hole 39 of the double ring needle thread balance 25, and the other end passes through the protruding portion 34B and is in contact with the upper end of the protruding portion 34A.
The thread take-up spring 36 has a recess 36A formed in the vicinity of the tip end thereof.
Tension is given to the needle thread by contacting the needle thread between the two protruding portions 34A and 34B of No. 4 of FIG.

【0020】次に図3〜図6に基づいて本実施例の動作
を説明する。図3は針棒4が上死点、図4は下死点にあ
る状態での針糸天秤24を示し、それぞれ(a)はミシ
ンの側面方向から見た図、(b)は正面方向から見た図
である。図5及び図6はそれぞれ針12、針糸9、ルー
パ5及びルーパ糸22の状態を説明するための正面図
で、図5(a)は針棒4が上死点に位置する状態、図5
(b)は針棒4が上死点から少し下降した状態、図6
(a)は針棒4が下死点に位置する状態、図6(b)は
針棒4が下死点から少し上昇した状態をそれぞれ示す。
Next, the operation of this embodiment will be described with reference to FIGS. 3A and 3B show the needle thread balance 24 when the needle bar 4 is at the top dead center and FIG. 4 is at the bottom dead center. FIG. 3A is a side view of the sewing machine, and FIG. It is the figure seen. 5 and 6 are front views for explaining the states of the needle 12, the needle thread 9, the looper 5 and the looper thread 22, respectively, and FIG. 5 (a) is a state in which the needle bar 4 is located at the top dead center, FIG. 5
FIG. 6B shows a state in which the needle bar 4 is slightly lowered from the top dead center, and FIG.
6A shows a state in which the needle bar 4 is located at the bottom dead center, and FIG. 6B shows a state in which the needle bar 4 is slightly elevated from the bottom dead center.

【0021】図3から明らかなように糸取りばね36が
天秤ガイド17,18の上方にあるときは針糸9が糸取
りばね36の凹部36Aと当接するので、糸取りばね3
6による加圧力が作用する。また、図4から明らかなよ
うに糸取りばね36が天秤ガイド17,18の下方にあ
るときは針糸9が糸取りばね36から離れるので、糸取
りばね36による加圧力が作用しない。
As is apparent from FIG. 3, when the thread take-up spring 36 is above the thread take-up guides 17, 18, the needle thread 9 comes into contact with the recess 36A of the thread take-up spring 36.
The pressing force by 6 acts. Further, as is apparent from FIG. 4, when the thread take-up spring 36 is below the thread balance guides 17 and 18, the needle thread 9 separates from the thread take-up spring 36, so that the pressing force by the thread take-up spring 36 does not act.

【0022】従って、図5(b)に示すように、針棒4
が上死点から下降しつつある時は針糸9は糸取りばね3
6によって与えられた上向きの加圧力により針糸9とル
ーパ5との間に充分な摩擦力が生るので、針糸9はルー
パ5と共に左方へ移動して針糸9、ルーパ糸22及びル
ーパ5によって形成される三角形を広げて行く。従っ
て、針12は該三角形の中へ容易に降下可能となる。
Therefore, as shown in FIG. 5B, the needle bar 4
The needle thread 9 is falling from the top dead center, the needle thread 9
A sufficient frictional force is generated between the needle thread 9 and the looper 5 by the upward pressing force applied by the needle thread 6, so that the needle thread 9 moves leftward together with the looper 5 and moves toward the needle thread 9, the looper thread 22 and the looper thread 22. Unfold the triangle formed by the looper 5. Therefore, the needle 12 can be easily lowered into the triangle.

【0023】一方、図6(b)に示すように針棒4が最
下点から上昇しつつある段階では糸取りばね36が作用
していないので、該糸取りばね36による針糸9へ上向
きの力が加わらず、針糸9のループ9bは充分広がり、
ルーパ5が該ループ9b内へ容易に進入可能となる。
On the other hand, as shown in FIG. 6 (b), since the thread take-up spring 36 is not working when the needle bar 4 is rising from the lowest point, the upward force applied to the needle thread 9 by the thread take-up spring 36 is increased. , The loop 9b of the needle thread 9 spreads sufficiently,
The looper 5 can easily enter the loop 9b.

【0024】図7は本発明による二重環縫いミシンの針
糸天秤の第2のの実施例を示し(a)は側面図、(b)
は正面図である。図8は図7の実施例の分解斜視図であ
る。この実施例では、二重環針糸天秤25及びロック針
糸天秤26へそれぞれ形成した穴40,41内へねじり
コイルばね(糸取りばね)42を挿通した軸43を通
し、二重環針糸天秤25をこの軸43の回りで回転可能
としている。
FIG. 7 shows a second embodiment of the needle thread balance of the double chainstitch sewing machine according to the present invention, (a) is a side view and (b) is a side view.
Is a front view. FIG. 8 is an exploded perspective view of the embodiment shown in FIG. In this embodiment, the shaft 43 having the torsion coil spring (thread take-up spring) 42 inserted therein is passed through the holes 40 and 41 formed in the double ring needle thread balance 25 and the lock needle thread balance 26, respectively. 25 is rotatable about this shaft 43.

【0025】また、二重環針糸天秤25及びロック針糸
天秤26へそれぞれピン44,45を固定し、コイルば
ね42の両端をこのピン44,45で支持している。ま
た、ロック針糸天秤26にはストッパ46が固定されて
いる。コイルばね42は二重環針糸天秤25を図7
(a)の反時計方向へ回転するように加圧しており、そ
の回転範囲はストッパ46によって規制される。この実
施例では針糸9は、二重環針糸天秤25の二又部34の
凹部34Cと当接する。その他の構成部分で図1及び図
2と同じ参照符号を付したものは第1の実施例と同様で
あるので、その説明を省略する。
Further, pins 44 and 45 are fixed to the double ring needle thread balance 25 and the lock needle thread balance 26, respectively, and both ends of the coil spring 42 are supported by the pins 44 and 45. A stopper 46 is fixed to the lock needle thread balance 26. The coil spring 42 is shown in FIG.
The pressure is applied so as to rotate in the counterclockwise direction in (a), and the rotation range is restricted by the stopper 46. In this embodiment, the needle thread 9 contacts the recess 34C of the forked portion 34 of the double ring needle thread balance 25. The other components having the same reference numerals as those in FIGS. 1 and 2 are the same as those in the first embodiment, and the description thereof will be omitted.

【0026】以上の構成により、二又部34の凹部34
Cが天秤ガイド17,18の上方にあるときは針糸9が
該凹部34Cと当接するので、二重環針糸天秤25を介
して針糸9へ糸取りばね42による上向きの加圧力が作
用する。また、凹部34Cが天秤ガイド17,18の下
方にあるときは針糸9が凹部34Cから離れるので、糸
取りばね42による加圧力が作用しない。従って、図5
及び図6を参照して説明した第1の実施例と同様の効果
を奏することができる。
With the above structure, the recess 34 of the forked portion 34 is formed.
When C is above the balance guides 17 and 18, the needle thread 9 comes into contact with the concave portion 34C, so that an upward pressing force by the thread take-up spring 42 acts on the needle thread 9 through the double ring needle thread balance 25. . Further, when the recessed portion 34C is below the balance guides 17 and 18, the needle thread 9 separates from the recessed portion 34C, so that the pressing force by the thread take-up spring 42 does not act. Therefore, FIG.
Also, the same effect as that of the first embodiment described with reference to FIG. 6 can be obtained.

【0027】図9は本発明による二重環縫いミシンの針
糸天秤の第3の実施例を示し(a)は側面図、(b)は
正面図である。図10は図9の実施例の分解斜視図であ
る。この実施例では、二重環針糸天秤25及びロック針
糸天秤26へそれぞれピン47,48が固定され、両ピ
ン47,48の間へ圧縮ばね(糸取りばね)49が取り
付けられている。この圧縮ばね49は二重環針糸天秤2
5を上方へ付勢している。二重環針糸天秤25は、ロッ
ク針糸天秤26あるいは天秤固定部材13へ固定される
図示しないストッパによりその上方移動を規制されてい
る。この実施例では針糸9は、二重環針糸天秤25の二
又部34の凹部34Cと当接する。その他の構成部分で
図1及び図2と同じ参照符号を付したものは第1の実施
例と同様であるので、その説明を省略する。
9A and 9B show a third embodiment of the needle thread balance of the double chain stitch sewing machine according to the present invention. FIG. 9A is a side view and FIG. 9B is a front view. FIG. 10 is an exploded perspective view of the embodiment shown in FIG. In this embodiment, pins 47 and 48 are fixed to the double ring needle thread balance 25 and the lock needle thread balance 26, respectively, and a compression spring (thread take-up spring) 49 is attached between the pins 47 and 48. This compression spring 49 is a double ring needle thread balance 2
5 is being pushed upwards. The upward movement of the double ring needle thread balance 25 is restricted by a stopper (not shown) fixed to the lock needle thread balance 26 or the thread balance fixing member 13. In this embodiment, the needle thread 9 contacts the recess 34C of the forked portion 34 of the double ring needle thread balance 25. The other components having the same reference numerals as those in FIGS. 1 and 2 are the same as those in the first embodiment, and the description thereof will be omitted.

【0028】以上の構成により、二又部34の凹部34
Cが天秤ガイド17,18の上方にあるときは針糸9が
該凹部34Cと当接するので、二重環針糸天秤25を介
して針糸9へ糸取りばね49による上向きの加圧力が作
用する。また、凹部34Cが天秤ガイド17,18の下
方にあるときは針糸9が凹部34Cから離れるので、糸
取りばね49による加圧力が作用しない。従って、図5
及び図6を参照して説明した第1の実施例と同様の効果
を奏することができる。
With the above structure, the recess 34 of the forked portion 34 is formed.
When C is above the balance guides 17 and 18, the needle thread 9 comes into contact with the concave portion 34C, so that an upward pressing force by the thread take-up spring 49 acts on the needle thread 9 through the double-ring needle thread balance 25. . Further, when the recess 34C is below the balance guides 17 and 18, the needle thread 9 separates from the recess 34C, so that the pressing force by the thread take-up spring 49 does not act. Therefore, FIG.
Also, the same effect as that of the first embodiment described with reference to FIG. 6 can be obtained.

【0029】図11及び図12は針糸天秤14の構成は
従来と同様で、ルーパの形状のみを変えることにより上
記実施例と同様の効果を奏することができることを説明
するための正面図であり、図11は針12が上死点位置
にある状態、図12は針12が図11の状態から少し下
降した状態を示す。このルーパ50は先端部付近へ下向
きの突出部50Aが設けられており、図12に示すよう
にルーパ50が左方へ後退する際に該突出部50Aによ
り針糸9をルーパ50と共に移動させることができる。
従って、針糸9、ルーパ糸22及びルーパ50によって
形成される三角形を広げてゆき、針12は該三角形の中
へ容易に降下可能となる。
11 and 12 are front views for explaining that the construction of the needle thread balance 14 is the same as that of the conventional one, and the same effect as that of the above embodiment can be obtained by changing only the shape of the looper. 11 shows a state in which the needle 12 is at the top dead center position, and FIG. 12 shows a state in which the needle 12 is slightly lowered from the state in FIG. This looper 50 is provided with a downwardly projecting portion 50A near the tip thereof, and as shown in FIG. 12, when the looper 50 retracts to the left, the needle thread 9 is moved together with the looper 50 by the projecting portion 50A. You can
Therefore, the triangle formed by the needle thread 9, the looper thread 22 and the looper 50 is expanded, and the needle 12 can be easily lowered into the triangle.

【0030】以上本発明の二重環縫いミシンの針糸天秤
を実施例に基づいて説明したが、本発明はこの実施例に
は限定されず種々変形可能である。
Although the needle thread balance of the double chain stitch sewing machine of the present invention has been described based on the embodiment, the present invention is not limited to this embodiment and can be variously modified.

【0031】[0031]

【発明の効果】本発明の二重環縫いミシンの針糸天秤に
よれば、針糸当接部が天秤ガイドの上方に位置するとき
にのみ針糸を上方へ加圧する弾性手段を設けたので、針
糸当接部が天秤ガイドの上方に位置するときは、弾性手
段による加圧力が針糸へ作用する。このため、ルーパが
ミシンの左方向へ後退する際にルーパと針糸の間の摩擦
力により、針糸も後退するので針糸9、ルーパ糸22及
びルーパ5によって形成される三角形が広げられる。従
って、圧物の被縫製品であっても目飛びが生じることが
ない。一方、針糸当接部が天秤ガイドの下方に位置する
ときは、弾性手段による加圧力が針糸へ作用しない。従
って、針糸のループは充分広がって該ループ内へのルー
パの進入が容易となる。
According to the needle thread balance of the double chain stitch sewing machine of the present invention, the elastic means for pressing the needle thread upward only when the needle thread contact portion is located above the thread balance guide is provided. When the needle thread contact portion is located above the balance guide, the pressure applied by the elastic means acts on the needle thread. Therefore, when the looper retracts to the left of the sewing machine, the needle thread also retracts due to the frictional force between the looper and the needle thread, so that the triangle formed by the needle thread 9, the looper thread 22 and the looper 5 is widened. Therefore, skipping does not occur even in a product to be sewn by pressure. On the other hand, when the needle thread contact portion is located below the balance guide, the pressure applied by the elastic means does not act on the needle thread. Therefore, the loop of the needle thread is sufficiently widened to facilitate the entry of the looper into the loop.

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

【図1】 本発明による二重環縫いミシンの針糸天秤を
インターロックミシンに適用した一実施例を示し(a)
は側面図、(b)は正面図である。
FIG. 1 shows an embodiment in which a needle thread balance of a double chain stitch sewing machine according to the present invention is applied to an interlock sewing machine (a).
Is a side view and (b) is a front view.

【図2】 図1の実施例の分解斜視図である。2 is an exploded perspective view of the embodiment of FIG. 1. FIG.

【図3】 図1の実施例の針棒が上死点にある状態の針
糸天秤を示し、(a)は側面図、(b)は正面図であ
る。
3A and 3B show a needle thread balance in a state where the needle bar of the embodiment of FIG. 1 is at the top dead center, FIG. 3A is a side view, and FIG. 3B is a front view.

【図4】 図1の実施例の針棒が下死点にある状態の針
糸天秤を示し、(a)は側面図、(b)は正面図であ
る。
4A and 4B show a needle thread balance in a state where the needle bar of the embodiment of FIG. 1 is at the bottom dead center, FIG. 4A is a side view and FIG. 4B is a front view.

【図5】 針、針糸、ルーパ及びルーパ糸の状態を説明
するための正面図で、(a)は針棒が上死点に位置する
状態、(b)は針棒が上死点から少し下降した状態を示
す。
5A and 5B are front views for explaining the states of the needle, the needle thread, the looper, and the looper thread. FIG. 5A is a state in which the needle bar is located at the top dead center, and FIG. Shows a slightly lowered state.

【図6】 針、針糸、ルーパ及びルーパ糸の状態を説明
するための正面図で、(a)は針棒が下死点に位置する
状態、(b)は針棒が下死点から少し上降した状態を示
す。
6A and 6B are front views for explaining the states of the needle, the needle thread, the looper, and the looper thread. FIG. 6A is a state in which the needle bar is located at the bottom dead center, and FIG. Shows a state of slightly rising and falling.

【図7】 本発明による二重環縫いミシンの針糸天秤の
他の実施例を示し(a)は側面図、(b)は正面図であ
る。
FIG. 7 shows another embodiment of the needle thread balance of the double chain stitch sewing machine according to the present invention, (a) is a side view and (b) is a front view.

【図8】 図7の実施例の分解斜視図である。FIG. 8 is an exploded perspective view of the embodiment of FIG.

【図9】 本発明による二重環縫いミシンの針糸天秤の
更に他の実施例を示し(a)は側面図、(b)は正面図
である。
FIG. 9 shows still another embodiment of the needle thread balance of the double chain stitch sewing machine according to the present invention, (a) is a side view and (b) is a front view.

【図10】 図9の実施例の分解斜視図である。FIG. 10 is an exploded perspective view of the embodiment of FIG.

【図11】 針糸天秤の構成は従来と同様で、ルーパの
形状のみを変えることにより上記実施例と同様の効果を
奏することができることを説明するものであり、針が上
死点位置にある状態の正面図である。
FIG. 11 illustrates that the configuration of the needle thread balance is the same as the conventional one, and that it is possible to obtain the same effect as that of the above embodiment by changing only the shape of the looper, and the needle is at the top dead center position. It is a front view of a state.

【図12】 針が下死点位置にある状態の図11と同様
な図である。
FIG. 12 is a view similar to FIG. 11 with the needle at the bottom dead center position.

【図13】 ロックミシンの従来例の正面図であり、針
棒が上死点にある状態を示す。
FIG. 13 is a front view of a conventional example of a lock sewing machine, showing a state in which a needle bar is at top dead center.

【図14】 図13のロックミシンの針糸天秤を示し、
(a)は側面図、(b)は正面図である。
FIG. 14 shows the needle thread balance of the lock sewing machine shown in FIG.
(A) is a side view and (b) is a front view.

【図15】 ロックミシンの従来例の正面図であり、針
棒が上死点から下降しつつある状態を示す。
FIG. 15 is a front view of a conventional example of a lock sewing machine, showing a state in which a needle bar is descending from top dead center.

【図16】 図15の状態における針、針糸、ルーパ及
びルーパ糸のみを示した上面図である。
16 is a top view showing only the needle, the needle thread, the looper, and the looper thread in the state of FIG.

【図17】 ロックミシンの従来例の正面図であり、針
棒が下死点にある状態を示す。
FIG. 17 is a front view of a conventional example of a lock sewing machine, showing a state in which a needle bar is at a bottom dead center.

【図18】えぐりを大きくした針を示し、(a)は正面
図、(b)は側面図である。
FIG. 18 shows a needle with a large cutout, (a) is a front view and (b) is a side view.

【符号の説明】[Explanation of symbols]

1 ロックミシン 3 ミシン
アーム 4 針棒 5 ルーパ 7 糸調子器 9 針糸 9a,9b 針糸のループ 10 被縫
製布 11 針留め 12 針 12a 針穴 13 天秤
固定部材 16 長孔 17,18
天秤ガイド 19〜21 針糸ガイド 22 ルー
パ糸 23 針 24 針糸天秤 25 二重
環針糸天秤 26 ロック針糸天秤 34 二又
部 34A,34B 突出部 34C 凹
部(針糸当接部) 36,42,49 糸取りばね 36A 凹
部(針糸当接部) 46 ストッパ 47,48
ピン 50 ルーパ 50A 突
出部
1 Lock sewing machine 3 Sewing machine arm 4 Needle bar 5 Looper 7 Thread tensioner 9 Needle thread 9a, 9b Needle thread loop 10 Sewing cloth 11 Needle clamp 12 Needle 12a Needle hole 13 Balance fixing member 16 Long hole 17, 18
Balance guide 19 to 21 Needle thread guide 22 Looper thread 23 Needle 24 Needle thread balance 25 Double ring needle thread balance 26 Lock needle thread balance 34 Bifurcated portion 34A, 34B Projection portion 34C Recessed portion (needle thread contact portion) 36, 42 , 49 Thread take-up spring 36A Recessed portion (needle thread contact portion) 46 Stopper 47, 48
Pin 50 Looper 50A Projection

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ミシン主軸に同期して上下動する針保持
体と、 ミシンアームに固定された2つの天秤ガイドと、 前記針保持体に固定され、且つ前記天秤ガイドの間を上
下動可能な針糸天秤と、を備えた二重環縫いミシンの針
糸天秤において、 針糸天秤は、 針糸と当接可能な針糸当接部と、 前記針糸当接部が前記天秤ガイドの上方に位置するとき
にのみ針糸を上方へ加圧する弾性手段と、を有すること
を特徴とする二重環縫いミシンの針糸天秤。
1. A needle holder that moves up and down in synchronism with a sewing machine spindle, two balance guides fixed to a sewing machine arm, and a needle holder fixed to the needle holder and vertically movable between the balance guides. In a needle thread balance of a double chain stitch sewing machine including a needle thread balance, the needle thread balance comprises: a needle thread contact portion capable of contacting a needle thread; and the needle thread contact portion above the thread balance guide. A needle thread balance for a double chain stitch sewing machine, the elastic means pressing the needle thread upward only when the needle thread thread is located at the position.
JP07297295A 1995-03-30 1995-03-30 Needle thread balance of double chain stitch sewing machine Expired - Fee Related JP3559610B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07297295A JP3559610B2 (en) 1995-03-30 1995-03-30 Needle thread balance of double chain stitch sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07297295A JP3559610B2 (en) 1995-03-30 1995-03-30 Needle thread balance of double chain stitch sewing machine

Publications (2)

Publication Number Publication Date
JPH08266766A true JPH08266766A (en) 1996-10-15
JP3559610B2 JP3559610B2 (en) 2004-09-02

Family

ID=13504822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07297295A Expired - Fee Related JP3559610B2 (en) 1995-03-30 1995-03-30 Needle thread balance of double chain stitch sewing machine

Country Status (1)

Country Link
JP (1) JP3559610B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050041A (en) * 2005-08-16 2007-03-01 Suzuki Seisakusho:Kk Cover stitch sewing machine
CN104233664A (en) * 2013-06-13 2014-12-24 Candart股份公司 Embroidery machine
CN107916505A (en) * 2017-12-22 2018-04-17 浙江中捷缝纫科技有限公司 A kind of take-up of sewing machine crosses line mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050041A (en) * 2005-08-16 2007-03-01 Suzuki Seisakusho:Kk Cover stitch sewing machine
CN104233664A (en) * 2013-06-13 2014-12-24 Candart股份公司 Embroidery machine
JP2015000084A (en) * 2013-06-13 2015-01-05 Candart株式会社 Embroidery machine
CN107916505A (en) * 2017-12-22 2018-04-17 浙江中捷缝纫科技有限公司 A kind of take-up of sewing machine crosses line mechanism

Also Published As

Publication number Publication date
JP3559610B2 (en) 2004-09-02

Similar Documents

Publication Publication Date Title
JP2009095503A (en) Presser foot for sewing machine and sewing machine
JPH08266766A (en) Needle thread take-up of double chain stitch sewing machine
US2616382A (en) Low inertia presser-mechanism for sewing machines
US5769014A (en) Ruffling device for mounting on a sewing machine
US4300463A (en) Needle threading device for sewing machines
US4111140A (en) Thread tensioning device for a sewing machine
JPS58105785A (en) Sewing machine
JP2841193B1 (en) Sewing presser foot for sewing step of cloth sewing machine
US4129084A (en) Needle bar disengaging device for sewing machines
JPH057684A (en) Threader for sewing machine
JPH05153Y2 (en)
US1067419A (en) Overseaming mechanism.
US6860212B2 (en) Threading apparatus for sewing machine
US7574970B2 (en) Presser for sewing machine and sewing machine
JP2608950B2 (en) Threading mechanism of lower looper in overlock sewing machine
US4535711A (en) Looper-cam shifting arrangement for a sewing machine
JP4783619B2 (en) sewing machine
JP7481893B2 (en) sewing machine
US5704302A (en) Looper device having a thread feeding mechanism
US4248169A (en) Intermittently operable needle thread snubber
US4519333A (en) Auxiliary presser foot for engaging a previously formed stitch
JPH08243278A (en) Presser unit for sewing machine
JPH07231991A (en) Fabric presser assembly of sewing machine
JPH057682A (en) Threader for sewing machine
JPH0489095A (en) Threading device of sewing machine

Legal Events

Date Code Title Description
A977 Report on retrieval

Effective date: 20040428

Free format text: JAPANESE INTERMEDIATE CODE: A971007

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Effective date: 20040507

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Effective date: 20040524

Free format text: JAPANESE INTERMEDIATE CODE: A61

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090528

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090528

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 6

Free format text: PAYMENT UNTIL: 20100528

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 6

Free format text: PAYMENT UNTIL: 20100528

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 7

Free format text: PAYMENT UNTIL: 20110528

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120528

Year of fee payment: 8

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130528

Year of fee payment: 9

LAPS Cancellation because of no payment of annual fees