JP3300415B2 - Sewing machine thread tensioner - Google Patents
Sewing machine thread tensionerInfo
- Publication number
- JP3300415B2 JP3300415B2 JP17698492A JP17698492A JP3300415B2 JP 3300415 B2 JP3300415 B2 JP 3300415B2 JP 17698492 A JP17698492 A JP 17698492A JP 17698492 A JP17698492 A JP 17698492A JP 3300415 B2 JP3300415 B2 JP 3300415B2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- thread tension
- tension
- sewing
- 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.)
- Expired - Fee Related
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- Sewing Machines And Sewing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明はミシンの糸調子器に係
わり、特に糸外れ、糸調子の乱れ、糸切れを防止するミ
シンの糸調子器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread tensioner for a sewing machine, and more particularly, to a thread tensioner for a sewing machine which prevents thread breakage, thread tension disorder and thread breakage.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】ミシン
は布の堅さや布の織り方、または糸の太さ、強さによる
縫目の乱れを調整するために、糸調子器や糸張力付与装
置を備える。この縫目の乱れを調整する糸調子器に備え
られる糸調子皿によって縫糸に所定のテンションを付与
する時、縫糸が扱かれて撚りが溜まり縫糸の捩れが発生
していた。この縫糸の捩れが解けずに縫糸が糸調子皿に
供給されると捩れた縫糸が本来の縫糸通路から外れた
り、また縫糸の捩れが糸調子皿に無理に供給されると、
縫糸のテンションが急に高くなるので糸調子器の糸調子
が乱れ不完全な縫目が生じたり又は縫糸のテンションの
限界を越えて糸切れが発生していた。更に、糸調子器に
備えられる糸調子軸に縫糸を巻きつける角度が少ない
と、糸調子皿に供給される捩れた縫糸が本来の縫糸通路
から外れやすくなるので、糸調子器の設置場所が限定さ
れていた。2. Description of the Related Art A sewing machine is provided with a thread tensioner and a thread tension applying device for adjusting the stiffness of a fabric, the weaving of a fabric, or the disturbance of a seam due to the thickness and strength of a thread. Equipment. When a predetermined tension is applied to a sewing thread by a thread tension plate provided in a thread tensioner that adjusts the disturbance of the seam, the sewing thread is handled, the twist is accumulated, and the sewing thread is twisted. If the thread is supplied to the thread tension plate without releasing the twist of the thread, the twisted thread may be displaced from the original thread passage, or if the twist of the thread is forcibly supplied to the thread tension plate,
Since the tension of the sewing thread suddenly increases, the thread tension of the thread tension device is disturbed, and incomplete stitches are generated, or thread breakage occurs beyond the limit of the thread tension. Furthermore, if the angle at which the thread is wound around the thread tension shaft provided in the thread tension device is small, the twisted thread supplied to the thread tension plate is likely to deviate from the original thread passage, so the installation location of the thread tension device is limited. It had been.
【０００３】このような問題点に対して、糸掛け時に縫
糸が確実に糸張力付与装置中に挿入され、且つミシン使
用中に糸張力付与装置中を通過する糸が外れることなく
縫糸の張力が安定して付与されるミシンの糸張力付与装
置が提案されている（特公昭６０−５２８３９号公
報）。この糸張力付与装置は図１２、図１３に示すよう
に、縫糸に所定のテンションを付与するための板状部材
２３に突起２７、２８を形成し、この突起２７、２８に
よって上糸張力付与装置２２の糸供給側に間隙が設けら
れる。これにより異なる太さの縫糸でも板状部材２３、
２４間を通過する縫糸が常に一定の経路に沿って通過
し、ミシン使用中においてその縫糸が両板状部材間から
離脱することがない。[0003] In order to cope with such a problem, the thread is securely inserted into the thread tension applying device at the time of threading, and the thread passing through the thread tension applying device during use of the sewing machine does not come off and the tension of the sewing thread is reduced. There has been proposed a thread tension applying device for a sewing machine which is stably applied (Japanese Patent Publication No. 60-52839). As shown in FIGS. 12 and 13, this thread tension applying device forms projections 27 and 28 on a plate-like member 23 for imparting a predetermined tension to a sewing thread. A gap is provided on the yarn supply side 22. Thereby, even if the sewing thread has a different thickness, the plate-like member 23,
The sewing thread passing between the 24 always passes along a fixed path, and the sewing thread does not separate from between the two plate-shaped members during use of the sewing machine.
【０００４】しかし、このようなミシンの糸張力付与装
置においても両板状部材間の縫糸挟持部を通過する縫糸
に所定のテンションを与える時に縫糸の撚りが縫糸挟持
部に扱かれて、縫糸挟持部の糸供給側に縫糸の撚りが溜
まり、縫糸の捩れが発生する可能性がある。この場合、
縫糸の捩れが解けずに縫糸が縫糸挟持部に供給される
と、捩れた縫糸が本来の縫糸通路から外れるので板状部
材２３、２４から外れてしまう虞があった。However, even in such a thread tension applying device of a sewing machine, when a predetermined tension is applied to a sewing thread passing through a thread holding portion between the two plate-shaped members, the twist of the sewing thread is handled by the thread holding portion, and the thread holding portion is held. There is a possibility that the twist of the sewing thread accumulates on the thread supply side of the portion and the twist of the sewing thread occurs. in this case,
If the thread is supplied to the thread holding portion without untwisting the thread, the twisted thread may come off from the original thread path, and thus may come off from the plate members 23 and 24.
【０００５】また、この捩れた縫糸が板状部材２３、２
４から外れることなく無理に供給されたとしても、上糸
のテンションが急に高くなるので上糸張力付与装置２２
の糸調子が乱れ不完全な縫目が生じたり、上糸の糸捩れ
が解けずに詰り縫糸のテンションの限界を越えると糸切
れが発生する虞があった。Further, the twisted thread is applied to the plate-like members 23, 2
Even if it is forcibly supplied without deviating from 4, since the tension of the upper thread suddenly increases, the upper thread tension applying device 22
If the thread tension is disturbed and incomplete stitches occur, or if the thread twist of the upper thread is not released and exceeds the limit of the tension of the stitched thread, thread breakage may occur.
【０００６】上記ミシンの糸張力付与装置の他に糸外れ
を防止するために、一対の糸調子皿の糸導入側に切欠部
を設けたミシンの糸調子器が提案されている（実開平４
−４４８８２号公報）。この糸調子器は充分な押圧力を
与えるために、糸調子皿に形成された縫糸を挟持させる
突起部の所定幅よりも小さく且つ形状が限定された切欠
部を設けることにより糸外れを防止している。しかし突
起部の大きさ及び形状が限定されるので、太い糸や捩れ
等を含んだ糸が供給されると切欠部分から糸が外れる虞
があった。In addition to the above-described thread tension applying device for the sewing machine, there has been proposed a thread tensioner of a sewing machine provided with a cutout portion on the thread introduction side of a pair of thread tension discs in order to prevent the thread from coming off (Japanese Utility Model Application Laid-Open No. HEI 4-4).
-44882). The thread tensioner is provided with a notch portion having a shape smaller than a predetermined width of a projection portion for holding a sewing thread formed on the thread tension plate in order to give a sufficient pressing force, thereby preventing the thread from coming off. ing. However, since the size and shape of the projection are limited, there is a risk that the thread may come off from the cutout portion when a thick thread or a thread containing a twist or the like is supplied.
【０００７】このような縫糸の捩れによる問題点に対し
て、縫糸の捩れを整流するための糸案内部材を備えたミ
シンの糸巻用張力付与装置が提案されている（実開平２
−４０３７８号公報）。このミシンの糸巻用張力付与装
置７は図１４に示すように糸案内部材１０に糸穴１０
Ａ、１０Ｂ、１０Ｃが穿孔されており、この糸穴１０
Ａ、１０Ｂ、１０Ｃに縫糸を巻着させることにより縫糸
は整流される。しかし糸穴１０Ａ、１０Ｂ、１０Ｃの大
きさが一定なので糸が太い場合には抵抗が大きくなり、
糸案内部材１０が糸巻用張力付与装置７による糸調子の
強弱に連動しないので、糸調子が難しく縫目が不完全に
なる虞があった。また、折曲片１０ａに縫糸を挿通させ
るための糸通し操作が複雑で操作が煩わしくなる欠点が
あった。In order to solve the problem caused by the twist of the sewing thread, there has been proposed a thread winding tension applying device for a sewing machine provided with a thread guide member for rectifying the twist of the sewing thread (Japanese Utility Model Application Laid-Open No. HEI 2 (1994)).
-40378 publication). As shown in FIG. 14, a thread winding tension applying device 7 of this sewing machine
A, 10B, and 10C are perforated.
The sewing thread is rectified by winding the sewing thread on A, 10B, and 10C. However, since the size of the thread holes 10A, 10B, and 10C is constant, the resistance increases when the thread is thick,
Since the thread guide member 10 does not interlock with the strength of the thread tension by the thread tension applying device 7, the thread tension is difficult and the seam may be incomplete. Further, there is a disadvantage that the threading operation for inserting the sewing thread through the bent piece 10a is complicated and the operation becomes complicated.
【０００８】[0008]
【目的】本発明は、このような従来の問題点を解決する
ためになされたもので、縫糸が常に糸調子器の一定の経
路に沿って通過し、また糸調子の乱れや糸切れを起こさ
ず、しかも糸通し操作が容易なミシンの糸調子器を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and the sewing thread always passes along a fixed path of the thread tensioner, and the thread tension may be disturbed or broken. It is another object of the present invention to provide a thread tensioner for a sewing machine that can easily perform a threading operation.
【０００９】[0009]
【課題を解決するための手段】このような目的を達成す
る本発明のミシンの糸調子器は、縫糸を挟持してテンシ
ョンを付与するための一対の糸調子皿と、糸調子皿に弾
発力を付与するためのバネが嵌装され糸調子皿を貫通し
てミシン本体に軸支される糸調子軸とを備えたミシンの
糸調子器において、糸調子皿は糸引出し側にあって糸調
子軸が貫通される主糸調子部と糸供給側にあってミシン
本体に軸支される支持軸が貫通される副糸調子部とを有
し、主糸調子部は糸調子軸より糸引出し側に互いに当接
して縫糸を挟持するための第１の凸部を有し、副糸調子
部は支持軸より糸引出し側に互いに当接して縫糸を挟持
するための第２の凸部を有し、これら第１の凸部と第２
の凸部は縫糸を挟持しない所定の空間を持って隔てら
れ、更に第１の凸部及び第２の凸部は、糸引出し側から
糸供給側に向って、縫糸を挟持するのを回避するために
開口して形成される。A thread tensioner of a sewing machine according to the present invention for achieving the above object has a pair of thread tension plates for clamping a sewing thread to apply tension, and a spring tensioning device for a thread tension plate. And a thread tension shaft which is fitted with a spring for applying a force and penetrates through the thread tension disc and is supported by the sewing machine main body. It has a main thread tension portion through which the tension shaft is penetrated, and a sub-thread tension portion through which a support shaft which is provided on the thread supply side and is supported by the sewing machine main body is penetrated. The auxiliary thread tension portion has a second convex portion for abutting each other on the yarn pulling-out side from the support shaft to clamp the sewing thread by abutting each other on the sewing thread. These first projections and second projections
Are separated by a predetermined space that does not pinch the suture, and the first and second protrusions avoid pinching the suture from the thread pull-out side toward the thread supply side. for
It is formed with an opening .
【００１０】[0010]
【作用】糸調子皿に設けられる主糸調子部は糸調子器に
備えられた糸調子バネの弾発力により縫糸を挟持しなが
ら糸調子を行ない、副糸調子部は主糸調子部に連動し縫
糸を挟持している。また、主糸調子部及び副糸調子部は
糸引出し側に形成され、この主糸調子部と副糸調子部と
の間には縫糸を挟持しない空間が設けられる。[Function] The main thread tension portion provided on the thread tension plate performs thread tension while holding the sewing thread by the elastic force of the thread tension spring provided in the thread tension device, and the sub thread tension portion is linked to the main thread tension portion. The sewing thread is clamped. The main thread tension portion and the sub thread tension portion are formed on the thread pull-out side, and a space is provided between the main thread tension portion and the sub thread tension portion so as not to hold the sewing thread.
【００１１】このような糸調子器に糸供給側の副糸調子
部から糸捩れ部が供給される際、副糸調子部の第２の凸
部が、糸引出し側から糸供給側に向って、縫糸を挟持す
るのを回避するために開口して形成されているので糸捩
れ部を含んだ縫糸が支持軸から外れることなく副糸挟持
部に供給され、この副糸挟持部に生じる糸調子バネの弾
発力は主糸調子部と副糸調子部の挟持部間隔の長さに応
じて主糸調子部に生じる弾発力よりも弱くなるので、糸
捩れ部は副糸調子部と主糸調子部との空間に無理なく収
納させることができる。収納された糸捩れ部の後に続く
縫糸を副糸調子部が挟持して固定し、糸捩れ部の先にあ
る縫糸は主糸調子部が挟持した状態で糸捩れを解消しな
がら一定のテンションを維持されて縫針やルーパに供給
される。従って縫糸の捩れ部を無理なく解消させること
ができる。When a yarn twisting portion is supplied to such a yarn tensioner from the auxiliary yarn tension portion on the yarn supply side, the second convex portion of the auxiliary yarn tension portion moves from the yarn drawing side to the yarn supply side. , Pinching the sewing thread
Since the thread is formed with an opening to prevent the thread from being threaded, the sewing thread including the thread twist portion is supplied to the auxiliary thread holding portion without coming off the support shaft, and the thread tension spring generated in the auxiliary thread holding portion is resilient. The force is weaker than the resilient force generated in the main thread tension part according to the length of the sandwiching part between the main thread tension part and the sub thread tension part. Can be easily stored in the space. The auxiliary thread tension section clamps and fixes the sewing thread following the stored thread twist section, and the thread at the tip of the thread twist section eliminates thread twist while the main thread tension section clamps and maintains a certain tension. It is maintained and supplied to sewing needles and loopers. Therefore, the twist portion of the sewing thread can be eliminated without difficulty.
【００１２】[0012]
【実施例】以下、本発明の一実施例について図面を参照
して説明をする。An embodiment of the present invention will be described below with reference to the drawings.
【００１３】まず本発明の糸調子器が適用されるミシン
の構成を簡単に説明する。First, the configuration of a sewing machine to which the thread tensioner of the present invention is applied will be briefly described.
【００１４】本発明の糸調子器が適用されるミシンは図
１、図２に示すような１本針３本糸オーバロックミシン
であり、このオーバロックミシン１においては３個の糸
巻３０から糸案内５を介して繰り出される１本の針糸２
及び２本のルーパ糸３、４が用いられ、これら３本の縫
糸に対応してミシン本体の内部に３個の糸調子器１０が
面板６に対して垂直に設けられる。この糸調子器１０は
面板６上において糸調子を行なうことができ、また糸調
子器１０に縫糸を掛ける為のスリット７が糸調子器１０
に平行して面板６上に３箇所設けられる。更に針棒天秤
９へ縫針用の糸調子器１０からの針糸２を案内する為の
糸案内８が設けられる。A sewing machine to which the thread tensioner of the present invention is applied is a one-needle, three-thread overlock sewing machine as shown in FIGS. 1 and 2. One needle thread 2 fed out through the guide 5
And two looper threads 3 and 4 are used, and three thread tensioners 10 are provided perpendicularly to the face plate 6 in the sewing machine main body corresponding to these three sewing threads. The thread tensioner 10 can perform thread tension on the face plate 6, and a slit 7 for threading a thread on the thread tensioner 10 is provided in the thread tensioner 10.
Are provided on the face plate 6 in parallel to Further, a thread guide 8 for guiding the needle thread 2 from the thread tensioner 10 for sewing needles to the needle bar balance 9 is provided.
【００１５】このように構成されたオーバロックミシン
１に適用される糸調子器１０は、図３に示すように主と
して糸巻３０から繰り出される縫糸を所定の押圧力で挟
持させるための一対の糸調子皿１４、１４′と、この糸
調子皿１４、１４′を支持するための糸調子軸１２及び
支持軸１３と、糸調子皿１４、１４′に所定の押圧力を
与えるための糸調子ツマミ１１、回転止メ１６、糸調子
バネ１７、バネ受ケ１５とから成る。As shown in FIG. 3, the thread tensioner 10 applied to the overlock sewing machine 1 configured as described above has a pair of thread tensioners for clamping a sewing thread mainly fed from the bobbin 30 with a predetermined pressing force. Plates 14, 14 ', a thread tension shaft 12 and a support shaft 13 for supporting the thread tension plates 14, 14', and a thread tension knob 11 for applying a predetermined pressing force to the thread tension plates 14, 14 '. , A rotation stopper 16, a thread tension spring 17, and a spring holder 15.
【００１６】一対の糸調子皿１４、１４′には図４に示
すように、糸引出し側Ｂに主糸調子部１４Ｂと糸供給側
Ａに副糸調子部１４Ａとが設けられる。As shown in FIG. 4, the pair of thread tension trays 14 and 14 'are provided with a main thread tension portion 14B on the yarn pull-out side B and a sub-thread tension portion 14A on the yarn supply side A.
【００１７】主糸調子部１４Ｂは糸調子軸１２が貫通さ
れるように軸穴１４ｂ′を設け、この軸穴１４ｂ′の周
りには第１の半月状凸部１４ｂの開口部が縫糸の進入方
向に設けられる。副糸調子部１４Ａは支持軸１３が貫通
されるように、軸穴１４ａ′を設け、この軸穴１４ａ′
の周りに設けられた第２の半月状凸部１４ａが半月状凸
部１４ｂと同方向に設けられる。この半月状凸部１４
ａ、１４ｂは、凸部の上面ｄから下面ｅに向ってなだら
かな斜面で形成されるので（断面Ａ−Ａ、Ｂ−Ｂ）、縫
糸は糸調子皿１４、１４′の半月状凸部１４ａ、１４ｂ
で形成される挟持部分から支持軸１３及び糸調子軸１２
に向って移動することができる。また、この半月状凸部
１４ａ及び１４ｂ間には縫糸を挟持しない空間が設けら
れる。The main thread tension portion 14B is provided with a shaft hole 14b 'so that the thread tension shaft 12 can pass therethrough. Around the shaft hole 14b', an opening of the first semi-lunar convex portion 14b is inserted. Direction. The auxiliary thread tension portion 14A is provided with a shaft hole 14a 'so that the support shaft 13 can pass therethrough.
Are provided in the same direction as the half-moon-shaped protrusions 14b. This half-moon-shaped protrusion 14
Since a and 14b are formed with gentle slopes from the upper surface d to the lower surface e of the convex portions (sections AA and BB), the sewing thread is a semi-lunar convex portion 14a of the thread tension plates 14, 14 '. , 14b
The support shaft 13 and the thread tension shaft 12
You can move towards. In addition, a space is provided between the crescent-shaped protrusions 14a and 14b so as not to hold the sewing thread.
【００１８】主糸調子部１４Ｂと副糸調子部１４Ａの挟
持部間隔Ｌは、糸捩れの長さをＨとするときＬ≧３Ｈと
なるように定められる。この糸捩れの長さＨは経験的に
算出することができる。主糸調子部１４Ｂと副糸調子部
１４Ａの間隔をこのように設定することにより縫糸の捩
れを確実に主糸調子部１４Ｂと副糸調子部１４Ａの挟持
部間の挟持しない空間に収納させることができる。これ
により糸調子皿１４、１４′に設けられた副糸調子部１
４Ａの挟持部分に縫糸が扱かれて撚りが溜まり縫糸の捩
れが発生しても、縫糸の捩れを確実に主糸調子部１４Ｂ
と副糸調子部１４Ａの挟持部間の挟持しない空間に収納
させることができるので、縫糸が詰って糸調子の乱れや
糸切れが発生することを防止できる。The distance L between the clamping portions of the main thread tension portion 14B and the sub thread tension portion 14A is determined such that L ≧ 3H when the length of the thread twist is H. The length H of the thread twist can be calculated empirically. By setting the interval between the main thread tension portion 14B and the sub thread tension portion 14A in this manner, the twist of the sewing thread can be reliably stored in a space that is not clamped between the clamping portions of the main thread tension portion 14B and the sub thread tension portion 14A. Can be. Thereby, the auxiliary thread tension portion 1 provided on the thread tension plates 14, 14 '
Even if the thread is handled by the holding portion of 4A and the twist accumulates and the thread is twisted, the twist of the thread can be surely prevented by the main thread tension portion 14B.
The auxiliary thread tension portion 14A can be accommodated in a space that is not clamped between the clamping portions of the auxiliary thread tension portion 14A.
【００１９】このように構成された一対の糸調子皿１
４、１４′は糸調子軸１２と支持軸１３とに挿嵌され
る。A pair of thread tension dishes 1 constructed as described above
4, 14 'are inserted into the thread tension shaft 12 and the support shaft 13.
【００２０】糸調子軸１２は面板６に対して垂直に備え
られた図示しない糸調子器の取り付け板に固定される。
この糸調子軸１２はその先端にボルト部１２ａを有し、
このボルト部１２ａの軸端面に開口する軸方向には長い
切割溝１２ｃが形成されている。このボルト部１２ａに
は糸調子皿１４、１４′に所定の押圧力を付与するため
の糸調子ツマミ１１が螺合される。糸調子ツマミ１１と
糸調子皿１４、１４′間には、切割溝１２ｃに嵌合する
部位１５ａが形成されたバネ受ケ１５と切割溝１２ｃに
嵌合する部位１６ａが形成された回転止メ１６とが、部
位１５ａ、１６ａにより回動しないように挿嵌される。
更にバネ受ケ１５と回転止メ１６間には糸調子皿１４、
１４′に所定の押圧力を付与させるために糸調子バネ１
７が介装されており、糸調子バネ１７の弾発力によって
バネ受ケ１５は糸調子皿１４、１４′を押圧する。従っ
て糸調子ツマミ１１を回動させると回転止メ１６の軸方
向の位置が変化するので糸調子バネ１７の弾発力が変化
し、糸調子を変えることができる。The thread tension shaft 12 is fixed to a mounting plate of a thread tension device (not shown) provided perpendicular to the face plate 6.
This thread tension shaft 12 has a bolt portion 12a at its tip,
A long split groove 12c is formed in the axial direction that opens on the shaft end face of the bolt portion 12a. A thread tension knob 11 for applying a predetermined pressing force to the thread tension plates 14, 14 'is screwed into the bolt portion 12a. Between the thread tension knob 11 and the thread tension discs 14 and 14 ', a spring stopper 15 having a portion 15a to be fitted in the cut groove 12c and a rotation stopper having a portion 16a to be fitted in the cut groove 12c. 16 are inserted by the parts 15a and 16a so as not to rotate.
Further, a thread tension plate 14 is provided between the spring catch 15 and the rotation stopper 16.
14 'to apply a predetermined pressing force to the thread tension spring 1
7 is interposed, and the spring catch 15 presses the thread tension discs 14 and 14 ′ by the elastic force of the thread tension spring 17. Therefore, when the thread tension knob 11 is rotated, the axial position of the rotation stopper 16 changes, so that the resilient force of the thread tension spring 17 changes and the thread tension can be changed.
【００２１】すなわち、糸調子ツマミ１１と糸調子軸１
２のボルト部１２ａを左ネジに構成した場合、糸調子ツ
マミ１１を右に回すことにより回転止メ１６は糸調子皿
１４、１４′側へ移動し、これによって糸調子は強くな
り、糸調子ツマミ１１を左に回すことにより回転止メ１
６は糸調子皿１４、１４′から離反する方向へ移動し、
これによって糸調子が弱くなる。また、糸調子ツマミ１
１と糸調子軸１２のボルト部１２ｂを右ネジに構成した
場合、糸調子ツマミ１１を右に回すことにより回転止メ
１６は糸調子皿１４、１４′から離反する方向へ移動
し、糸調子ツマミ１１を左に回すことにより回転止メ１
６は糸調子皿１４、１４′側へ移動する。つまり糸調子
ツマミ１１を左に回すことにより糸調子が弱くなり、右
に回すことにより糸調子が弱くなる。That is, the thread tension knob 11 and the thread tension shaft 1
When the second bolt portion 12a is formed as a left-hand thread, the rotation stopper 16 is moved to the thread tension discs 14 and 14 'by turning the thread tension knob 11 clockwise, whereby the thread tension is increased. Turn knob 11 counterclockwise to stop rotation 1
6 moves in a direction away from the thread tension dishes 14, 14 ',
This weakens the thread tension. In addition, thread tension knob 1
1 and the bolt portion 12b of the thread tension shaft 12 is formed as a right-hand thread, the rotation stopper 16 is moved in a direction away from the thread tension plates 14, 14 'by turning the thread tension knob 11 clockwise. Turn knob 11 counterclockwise to stop rotation 1
6 moves to the thread tension dishes 14, 14 '. That is, turning the thread tension knob 11 counterclockwise weakens the thread tension, and turning it clockwise weakens the thread tension.
【００２２】尚、糸調子ツマミ１１の螺合側には粗面食
込み部が設けられ、また回転止メ１６にも粗面食込み部
が設けられ、この糸調子ツマミ１１の粗面食込み部と回
転止メ１６の粗面食込み部とを歯合させることにより糸
調子ツマミ１１を段階的に回動させることができる。The thread tension knob 11 is provided with a roughened biting portion on the threaded side, and the rotation stopper 16 is also provided with a roughened biting portion. The thread tension knob 11 can be rotated in a stepwise manner by meshing with the rough biting portion of the stop 16.
【００２３】次に、支持軸１３は糸調子皿１４、１４′
に設けられた副糸調子部１４Ａを支持するために設けら
れ、糸調子軸１２と挟持部間隔Ｌで糸調子器の取り付け
板に垂直に固定される。Next, the support shaft 13 is mounted on the thread tension discs 14, 14 '.
The auxiliary thread tension portion 14A is provided to support the thread tension shaft 12 and is fixed vertically to the mounting plate of the thread tension device at the interval L between the thread tension shaft 12 and the holding portion.
【００２４】以上のように構成されたミシンの糸調子器
の動作について説明する。The operation of the thread tension controller of the sewing machine having the above-described configuration will be described.
【００２５】縫製作業中に糸巻３０から糸案内５を介し
て繰り出される縫糸に図５、図６に示すように糸調子バ
ネ１７の弾発力により所定の押圧力を与えられる一対の
糸調子皿１４、１４′によって縫糸に所定のテンション
を付与する時、この一対の糸調子皿１４、１４′の挟持
部で縫糸が扱かれて撚りが溜まり縫糸の捩れが発生する
と、この縫糸は糸捩れの長さＨを含んだ状態で糸調子皿
１４、１４′の副糸調子部１４Ａに供給される。この
時、副糸調子部１４Ａは半月状凸部１４ａの開口部が糸
供給側に設けられ、又、副糸調子部１４Ａに生じる糸調
子バネ１７の弾発力が主糸調子部１４Ｂと副糸調子部１
４Ａの挟持部間隔Ｌの長さに応じて主糸調子部Ｂに生じ
る弾発力よりも弱くなるので、極太の縫糸や毛糸等の大
きい糸捩れでも半月状凸部１４ａの内側面に添って支持
軸１３に当接させることができ、この半月状凸部１４ａ
及び１４ｂ間の縫糸を挟持しない空間にスムーズに糸捩
れの長さＨを含んだ縫糸を無理なく供給させることがで
きる。これにより縫糸が本来の縫糸通路から外れること
を防止でき、更に縫糸の糸張力を安定させ、不完全な縫
目や糸切れを防止することができる。また糸調子皿１
４、１４′は糸捩れを主糸調子部１４Ｂに到達させず
に、図７に示すように主糸調子部１４Ｂと副糸調子部１
４Ａの挟持部間の挟持しない空間に収納させることがで
きる。As shown in FIGS. 5 and 6, a pair of thread tension discs is provided with a predetermined pressing force by a resilient force of a thread tension spring 17, as shown in FIGS. When a predetermined tension is applied to the sewing thread by the sewing thread 14 and 14 ', when the sewing thread is handled by the clamping portions of the pair of thread tension plates 14 and 14' and the twist is accumulated and the sewing thread is twisted, the sewing thread is twisted. It is supplied to the auxiliary thread tension portion 14A of the thread tension plates 14, 14 'in a state including the length H. At this time, the auxiliary thread tension portion 14A is provided with an opening of the semilunar convex portion 14a on the yarn supply side, and the elastic force of the thread tension spring 17 generated in the sub thread tension portion 14A is reduced by the main thread tension portion 14B and the auxiliary thread tension portion. Thread tension part 1
Since the elastic force generated in the main thread tension portion B becomes weaker in accordance with the length of the holding portion interval L of 4A, even a large thread twist such as a very thick sewing thread or wool can be attached to the inner surface of the semilunar convex portion 14a. The half-moon-shaped projection 14a can be brought into contact with the support shaft 13.
And 14b can be smoothly supplied with a suture including the thread twist length H to a space where the suture is not sandwiched. Thus, the sewing thread can be prevented from coming off the original sewing thread passage, the thread tension of the sewing thread can be stabilized, and incomplete stitches and thread breakage can be prevented. In addition, thread tension plate 1
4, 14 'do not allow the yarn twist to reach the main thread tension portion 14B, and the main thread tension portion 14B and the sub thread tension portion 1 as shown in FIG.
4A can be stored in a space that is not sandwiched between the sandwiching portions.
【００２６】このように糸捩れを収納後、糸調子皿１
４、１４′に所定の押圧力を与える糸調子バネ１７の弾
発力により、継続する縫糸の直径分のみを副糸調子部１
４ＡのＣ部にて挟持させ、また主糸調子部１４Ｂも縫糸
の直径分のみを挟持させることになる。これによりミシ
ンの動作に連動して糸引出し側Ｂに縫糸が引張られる
時、図８、図９に示すように副糸調子部１４ＡのＣ部に
て縫糸の直径分のみを挟持するので、糸供給側Ａの縫糸
は糸捩れの長さＨが解消するまで供給されないことにな
り、この副糸調子部と主糸調子部との連動作用により安
定した糸調子が得られる。また、この連動作用は縫糸の
太さが異なっても糸調子ツマミ１１にて縫糸のテンショ
ンを調整するだけで主糸調子部Ｂの挟持力と副糸調子部
Ａの挟持力とが同調して変化するので、縫糸の捩れをス
ムーズに供給させながら縫糸の捩れを解消することがで
きる。これにより縫糸のテンションが常に安定した状態
を保つことができるので綺麗な縫目を作る事ができる。After storing the thread twist in this way, the thread tension plate 1
Due to the resilience of the thread tension spring 17 for applying a predetermined pressing force to the sub thread tension portion 4 and 14 ', only the diameter of the continuous sewing thread is reduced to the auxiliary thread tension portion 1.
4C, the main thread tension portion 14B is also clamped only by the diameter of the sewing thread. As a result, when the sewing thread is pulled to the thread pull-out side B in conjunction with the operation of the sewing machine, only the diameter of the sewing thread is clamped at the portion C of the auxiliary thread tension portion 14A as shown in FIGS. The sewing thread on the supply side A is not supplied until the length H of the thread twist is eliminated, and a stable thread tension can be obtained by the interlocking action of the sub-thread tension portion and the main thread tension portion. In addition, this interlocking operation is achieved by adjusting the tension of the sewing thread with the thread tension knob 11 and adjusting the clamping force of the main thread tension portion B and the clamping force of the sub thread tension portion A even if the thickness of the thread is different. Because of the change, the twist of the suture can be eliminated while smoothly supplying the twist of the suture. As a result, the tension of the sewing thread can always be kept stable, so that a beautiful stitch can be formed.
【００２７】糸捩れが解消後、図１０に示すように糸引
出し側Ｂに縫糸が引張られる力に同調して糸供給側Ａの
縫糸も引張られることになる。After the thread twist is eliminated, the thread on the thread supply side A is also pulled in synchronism with the pulling force of the thread on the thread pull-out side B as shown in FIG.
【００２８】尚、本実施例によれば一対の糸調子皿１
４、１４′を使用して目的を達成させていたが、糸調子
皿は片方だけでも一対の糸調子皿１４、１４′と同様の
作用即ち糸供給側の副糸調子部から糸捩れ部が供給され
ると、糸捩れ部は副糸調子部と主糸調子部との空間に収
納され、この収納された糸捩れ部の後に続く縫糸を副糸
調子部が挟持して固定し、糸捩れ部の先にある縫糸は主
糸調子部が挟持した状態で糸捩れを解消しながら一定の
テンションを維持されて縫針やルーパに供給することが
できる。これにより一対の糸調子皿１４、１４′を使用
した場合と同様の効果を得られるので、生産コストを低
減させることができる。According to the present embodiment, a pair of thread tension dishes 1
Although the purpose is achieved by using the thread tension discs 4 and 14 ', the operation of the thread tension disc is the same as that of the pair of thread tension discs 14 and 14'. When supplied, the thread twist portion is stored in the space between the auxiliary thread tension portion and the main thread tension portion, and the sewing thread following the stored thread twist portion is sandwiched and fixed by the auxiliary thread tension portion, and the thread twist is performed. The sewing thread at the end of the section can be supplied to the sewing needle or the looper while maintaining a constant tension while eliminating the thread twist while the main thread tension section is sandwiched. As a result, the same effect as in the case of using the pair of thread tension dishes 14, 14 'can be obtained, so that the production cost can be reduced.
【００２９】また糸調子皿１４、１４′の主糸調子部１
４Ｂと副糸調子部１４Ａとを独立させて設けることによ
り縫糸を挟持しない空間が形成されているが、図１１に
示すように主糸調子部１４Ｂと副糸調子部１４Ａの凸部
を連設させても、或いは副糸調子部１４Ａ及び主糸調子
部１４Ｂの半月状凸部１４ａ、１４ｂが半月状凸部に限
らず、縫糸を糸調子皿１４、１４′の副糸調子部１４Ａ
及び主糸調子部１４Ｂの挟持部分から支持軸１３及び糸
調子軸１２に向って移動することができれば、副糸調子
部１４Ａ及び主糸調子部１４Ｂはどのような形状でもよ
い。The main thread tension portion 1 of the thread tension plates 14, 14 '
By providing the 4B and the auxiliary thread tension portion 14A independently, a space in which the sewing thread is not sandwiched is formed. However, as shown in FIG. 11, the convex portions of the main thread tension portion 14B and the auxiliary thread tension portion 14A are provided continuously. Alternatively, the semi-lunar convex portions 14a and 14b of the auxiliary thread tension portion 14A and the main thread tension portion 14B are not limited to the semi-lunar convex portions, and the sewing thread may be used as the auxiliary thread tension portions 14A of the thread tension plates 14, 14 '.
The auxiliary thread tension portion 14A and the main thread tension portion 14B may have any shape as long as the auxiliary thread tension portion 14A and the main thread tension portion 14B can move from the sandwiched portion of the main thread tension portion 14B toward the support shaft 13 and the thread tension shaft 12.
【００３０】尚、本発明の糸調子器が適用されるミシン
は１本針３本糸オーバロックミシンに限らず、どのよう
なタイプのミシンでも適用することができる。The sewing machine to which the thread tensioner of the present invention is applied is not limited to a one-needle, three-thread overlock sewing machine, but may be any type of sewing machine.
【００３１】[0031]
【発明の効果】以上の実施例からも明らかなように、糸
調子器の糸引出し側に縫糸のテンションを調節する主糸
調子部と、糸供給側に主糸調子部に従動して縫糸を挟持
する副糸調子部を設けると共に、副糸調子部及び主糸調
子部間の縫糸を挟持しない空間を設けたので、縫糸に発
生した糸捩れは縫糸を挟持しない空間に収納されてか
ら、副糸調子部の挟持部分で糸供給側の縫糸が固定さ
れ、この空間内で縫糸の捩れを確実に解消させることが
できる。As is apparent from the above embodiment, the main thread tension portion for adjusting the tension of the sewing thread is provided on the thread pull-out side of the thread tensioner, and the thread is driven on the thread supply side by following the main thread tension portion. Since the auxiliary thread tension portion to be pinched is provided and a space between the sub thread tension portion and the main thread tension portion not to pinch the sewing thread is provided, the thread twist generated in the sewing thread is stored in the space not to pinch the sewing thread. The sewing thread on the thread supply side is fixed at the holding portion of the thread tension portion, and the twist of the sewing thread can be reliably eliminated in this space.
【００３２】又、主糸調子部の第１の凸部及び副糸調子
部の第２の凸部は、糸引出し側から糸供給側に向って、
縫糸を挟持するのを回避するために開口して形成されて
いるので、糸捩れ部を含んだ縫糸が糸調子軸及び支持軸
から外れることなく主糸調子部及び副糸調子部に供給さ
せることができる。[0032] Further, the second convex portion of the first protrusion and the sub-thread tension of the main thread tension unit is a junction thread drawer side to the yarn supply side,
Since the opening is formed to avoid pinching the sewing thread, the sewing thread including the thread twist portion is supplied to the main thread tension portion and the sub thread tension portion without coming off from the thread tension shaft and the support shaft. Can be.
【００３３】これにより縫糸に生じる糸捩れの作用で発
生する糸外れ、糸調子の乱れ、糸切れを防止することが
できる。また縫糸を糸調子器に供給する際、縫糸の糸掛
け動作だけで済むので操作が容易である。As a result, it is possible to prevent a thread coming off, a disorder of a thread condition, and a thread break caused by a twisting action of a sewing thread. Further, when supplying the sewing thread to the thread tensioner, only the thread hooking operation of the sewing thread is required, so that the operation is easy.
【００３４】更に糸調子皿に副糸調子部と主糸調子部と
を設け、この副糸調子部及び主糸調子部間に一定の空間
を設けて連動させるようにしたので、糸調子器に備えら
れる支持軸及び糸調子軸に縫糸を巻きつける角度が限定
されず糸調子器を設置する自由度が増した。Further, a sub-tension portion and a main-tension portion are provided on the thread tension plate, and a fixed space is provided between the sub-tension portion and the main-tension portion so as to interlock with each other. The angle at which the sewing thread is wound around the provided support shaft and thread tension shaft is not limited, and the degree of freedom in installing the thread tensioner is increased.
【図１】本発明のミシンの糸調子器が適用されるオーバ
ロックミシンの正面図FIG. 1 is a front view of an overlock sewing machine to which a thread tensioner of a sewing machine according to the present invention is applied.
【図２】図１の本発明のミシンの糸調子器の側面図FIG. 2 is a side view of the thread tensioner of the sewing machine of the present invention shown in FIG. 1;
【図３】本発明のミシンの糸調子器の一実施例の断面図FIG. 3 is a sectional view of an embodiment of the thread tensioner of the sewing machine of the present invention.
【図４】同実施例の構成部品の糸調子皿FIG. 4 is a thread tension plate of a component of the embodiment.
【図５】同実施例による縫糸の捩れ解消の状態を示す図FIG. 5 is a view showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図６】同実施例による縫糸の捩れ解消の状態を示す図FIG. 6 is a diagram showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図７】同実施例による縫糸の捩れ解消の状態を示す図FIG. 7 is a view showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図８】同実施例による縫糸の捩れ解消の状態を示す図FIG. 8 is a view showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図９】同実施例による縫糸の捩れ解消の状態を示す図FIG. 9 is a diagram showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図１０】同実施例による縫糸の捩れ解消の状態を示す
図FIG. 10 is a view showing a state in which the twist of the sewing thread is eliminated according to the embodiment.
【図１１】同実施例の構成部品の糸調子皿の他の例FIG. 11 is another example of the thread tension plate of the component of the embodiment.
【図１２】従来のミシンの糸張力付与装置の正面図FIG. 12 is a front view of a conventional thread tension applying device for a sewing machine.
【図１３】図１２の従来のミシンの糸張力付与装置の拡
大側面図FIG. 13 is an enlarged side view of the conventional thread tension applying device of the sewing machine of FIG. 12;
【図１４】従来のミシンの糸張力付与装置の斜視図FIG. 14 is a perspective view of a conventional thread tension applying device for a sewing machine.
１１…糸調子ツマミ １２…糸調子軸 １２ａ…糸調子軸のボルト部 １２ｂ…糸調子軸の平滑部 １２ｃ…糸調子軸の切割部 １３…支持軸 １４、１４′…糸調子皿 １４ａ、１４ｂ…半月状凸部 １４ａ′、１４ｂ′…軸穴 １５…バネ受ケ １６…回転止メ １５ａ、１６ａ…部位 １７…糸調子バネ DESCRIPTION OF SYMBOLS 11 ... thread tension knob 12 ... thread tension axis 12a ... bolt part of thread tension axis 12b ... thread tension axis smooth part 12c ... thread tension axis cutting part 13 ... support shaft 14, 14 '... thread tension plate 14a, 14b ... Half-moon-shaped projections 14a ', 14b' ... shaft holes 15 ... spring receiving members 16 ... rotation stoppers 15a, 16a ... parts 17 ... thread tension springs
Claims (2)
を付与するための一対の糸調子皿（１４、１４′）と、
前記糸調子皿に弾発力を付与するためのバネ（１７）が
嵌装され前記糸調子皿を貫通してミシン本体に軸支され
る糸調子軸（１２）とを備えたミシンの糸調子器におい
て、前記糸調子皿は糸引出し側にあって前記糸調子軸が
貫通される主糸調子部（１４Ｂ）と糸供給側にあって前
記ミシン本体に軸支される支持軸（１３）が貫通される
副糸調子部（１４Ａ）とを有し、前記主糸調子部は前記
糸調子軸より糸引出し側に互いに当接して前記縫糸を挟
持するための第１の凸部（１４b）を有し、前記副糸調
子部は前記支持軸より糸引出し側に互いに当接して前記
縫糸を挟持するための第２の凸部（１４a）を有し、こ
れら第１の凸部と第２の凸部は縫糸を挟持しない所定の
空間（Ｌ）を持って隔てられていることを特徴とするミ
シンの糸調子器。1. A pair of thread tension plates (14, 14 ') for sandwiching sewing threads (2, 3, 4) to apply tension.
A thread tension shaft (12) fitted with a spring (17) for applying elastic force to the thread tension disc and penetrating through the thread tension disc and supported by a sewing machine main body; A main thread tension portion (14B) through which the thread tension shaft passes and a support shaft (13) pivotally supported by the sewing machine body at a thread supply side. a sub-thread tension unit which is through the (14A), said main thread tension unit have a first convex portion for holding the suture in contact with each other in the thread pull-out side of the thread tension shaft (14b) The auxiliary thread tension portion has a second convex portion (14a) for holding the sewing thread in contact with the yarn withdrawal side from the support shaft, and the first convex portion and the second convex portion. A thread tension device for a sewing machine, wherein the thread tension device is separated by a predetermined space (L) that does not hold a sewing thread.
調子部の第２の凸部は、糸引出し側から糸供給側に向っ
て、前記縫糸を挟持するのを回避するために開口して形
成される請求項１記載のミシンの糸調子器。2. A first convex portion of the main thread tension portion and a second convex portion of the sub thread tension portion avoid pinching the sewing thread from a thread pull-out side to a thread supply side. The thread tensioner of the sewing machine according to claim 1, wherein the thread tensioner is formed to be open for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17698492A JP3300415B2 (en) | 1992-07-03 | 1992-07-03 | Sewing machine thread tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17698492A JP3300415B2 (en) | 1992-07-03 | 1992-07-03 | Sewing machine thread tensioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0615081A JPH0615081A (en) | 1994-01-25 |
| JP3300415B2 true JP3300415B2 (en) | 2002-07-08 |
Family
ID=16023151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17698492A Expired - Fee Related JP3300415B2 (en) | 1992-07-03 | 1992-07-03 | Sewing machine thread tensioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3300415B2 (en) |
-
1992
- 1992-07-03 JP JP17698492A patent/JP3300415B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0615081A (en) | 1994-01-25 |
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