JP2016144492A - sewing machine - Google Patents

sewing machine Download PDF

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JP2016144492A
JP2016144492A JP2015021798A JP2015021798A JP2016144492A JP 2016144492 A JP2016144492 A JP 2016144492A JP 2015021798 A JP2015021798 A JP 2015021798A JP 2015021798 A JP2015021798 A JP 2015021798A JP 2016144492 A JP2016144492 A JP 2016144492A
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thread
sewing
needle
holding
hole
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JP6530197B2 (en
Inventor
斉藤 勝
Masaru Saito
勝 斉藤
椎名 隆行
Takayuki Shiina
隆行 椎名
勇二 山本
Yuji Yamamoto
勇二 山本
響一 玉木
Kyoichi Tamaki
響一 玉木
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Juki株式会社
Juki Corp
Juki株式会社
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B65/00Devices for severing the needle or lower thread
    • D05B65/06Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B87/00Needle- or looper- threading devices
    • D05B87/02Needle- or looper- threading devices with mechanical means for moving thread through needle or looper eye
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B65/00Devices for severing the needle or lower thread
    • D05B65/02Devices for severing the needle or lower thread controlled by the sewing mechanisms
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B81/00Sewing machines incorporating devices serving purposes other than sewing, e.g. for blowing air, for grinding
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05DINDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00Use of special elements
    • D05D2207/02Pneumatic or hydraulic devices
    • D05D2207/04Suction or blowing devices

Abstract

PROBLEM TO BE SOLVED: To shorten the sewing start end portion of a bobbin thread in a sewn object.SOLUTION: A sewing machine 10 with a needle hole 15 formed in a needle plate 17 or a feed dog 14 includes: a bobbin thread insertion mechanism 2 for inserting the sewing start end portion of a bobbin thread D through the needle hole from below by air; a sewing start end portion holding mechanism 50 for holding the sewing start end portion of the bobbin thread inserted through the needle hole on the upper side of the needle plate; a first thread cutting device 60 for cutting the sewing start end portion of the bobbin thread held by the sewing start end portion holding mechanism; and a control device 110 for controlling the operation of the sewing machine. The bobbin thread inserted through the needle hole by the bobbin thread insertion mechanism 2 is held by the sewing start end portion holding mechanism 50 and cut by the first thread cutting device 60, thereby shortening the sewing start end portion of the bobbin thread.SELECTED DRAWING: Figure 2

Description

本発明は、糸切り装置を備えるミシンに関する。   The present invention relates to a sewing machine including a thread trimming device.
従来のミシンは、針板の下側で第一針目の針落ちを行う縫い針から上糸の縫い開始端部を捕捉部材により捕捉し、数針の針落ち後に上糸の縫い開始端部を解放する上糸捕捉機構を備え、上糸の縫い開始端部が天秤の引き上げにより、第一針目の針落ち位置から抜けて縫い不良が生じることを防止していた。
この捕捉機構の捕捉部材は、互いに接離可能な対向面を有しており、対向面の間で縫い針の針落ちを行わせると共に上糸の縫い開始端部が釜の剣先によって下方に引き出されたときに対向面を閉じて上糸の縫い開始端部の捕捉を行っていた。
しかしながら、このように上糸の縫い開始端部の捕捉を行うと、布地の裏面の第一針目の針落ち位置からは上糸の縫い開始端部が長く垂れ下がることとなる。
従って、従来の上糸捕捉機構では、第一針目の針落ち後の捕捉部材の対向面における保持力を通常よりも低減し、天秤の引き上げにより、上糸の縫い開始端部が捕捉部材から全て引き抜かれない程度に摺動させて捕捉長が短くなるように保持力を調節していた(例えば、特許文献1参照)。
The conventional sewing machine uses a catching member to catch the sewing start end of the upper thread from the sewing needle that performs needle dropping of the first stitch below the needle plate, and after the needle dropping of several stitches, the sewing start end of the upper thread is An upper thread catching mechanism for releasing is provided, and the sewing start end of the upper thread is prevented from being pulled out of the needle drop position of the first stitch by pulling up the balance, resulting in poor sewing.
The catching members of this catching mechanism have opposing surfaces that can be brought into contact with and separated from each other. The needles of the sewing needle are dropped between the opposing surfaces, and the sewing start end of the upper thread is pulled downward by the sword tip of the hook. When this occurs, the opposite surface is closed and the sewing thread end of the upper thread is captured.
However, when the sewing start end portion of the upper thread is captured in this manner, the sewing start end portion of the upper thread hangs down from the needle drop position of the first stitch on the back surface of the fabric.
Therefore, in the conventional upper thread catching mechanism, the holding force on the opposing surface of the catching member after the needle drop of the first stitch is reduced more than usual, and the upper end of the upper thread is sewn from the catching member by lifting the balance. The holding force was adjusted so that the capture length was shortened by sliding it to the extent that it was not pulled out (see, for example, Patent Document 1).
特開2006−320365号公報JP 2006-320365 A
しかしながら、上記従来のミシンは、上糸の縫い開始端部を短くするための配慮を行ってはいるが、下糸については縫い開始端部がそのまま残り、被縫製物から長く垂れ下がるために縫い品質の低下を招いていた。また、縫い品質の向上を図るために、縫製後に下糸の縫い開始端部を手作業で切断しなければならず、作業負担の増加を招いていた。   However, the above-mentioned conventional sewing machine has taken care to shorten the sewing start end of the upper thread, but the sewing start end remains as it is for the lower thread, and the sewing quality is lowered because it hangs down from the sewing product for a long time. Has led to a decline. Further, in order to improve the sewing quality, the sewing start end portion of the lower thread has to be cut manually after sewing, resulting in an increase in work load.
本発明は、被縫製物に残る下糸の縫い開始端部を短くすることをその目的とする。   An object of the present invention is to shorten the sewing start end portion of the lower thread remaining on the workpiece.
請求項1記載の発明は、
針板又は送り歯に針穴が形成されたミシンにおいて、
下糸の縫い開始端部をエアーにより下側から針穴へ挿通させるエアーブロー機構を有する下糸挿通機構と、
前記針穴に通された下糸の縫い開始端部を針板の上側で保持する縫い開始端部保持機構と、
前記縫い開始端部保持機構に保持された下糸の縫い開始端部を切断する第一の糸切り装置と、
ミシンの動作制御を行う制御装置と、を備えることを特徴とする。
The invention described in claim 1
In sewing machines where needle holes are formed in the needle plate or feed dog,
A lower thread insertion mechanism having an air blow mechanism for inserting the sewing start end of the lower thread from the lower side into the needle hole by air;
A sewing start end holding mechanism for holding the sewing start end of the lower thread passed through the needle hole on the upper side of the needle plate;
A first thread trimming device that cuts a sewing start end of a lower thread held by the sewing start end holding mechanism;
And a control device that controls the operation of the sewing machine.
請求項2記載の発明は、請求項1記載のミシンにおいて、
前記エアーブロー機構は、前記針穴に向けてエアーを吐出するノズルを備え、当該ノズルは、先端部に前記下糸の縫い開始端部を通すスリット部を有することを特徴とする。
The invention according to claim 2 is the sewing machine according to claim 1,
The air blow mechanism includes a nozzle that discharges air toward the needle hole, and the nozzle has a slit portion that passes a sewing start end portion of the lower thread at a tip portion.
請求項3記載の発明は、請求項1又は2記載のミシンにおいて、
前記縫い開始端部保持機構は、
上糸捕捉孔と下糸捕捉孔とがスライド方向に沿って並んで形成され、前記下糸の縫い開始端部及び上糸の縫い開始端部を前記針板の対向面との間に挟んで保持する事が可能なスライド板を備え、
前記スライド板は、前記上糸捕捉孔と前記針穴が重合した上糸挿通位置と、前記下糸捕捉孔と前記針穴が重合した下糸挿通位置と、前記下糸捕捉穴と前記上糸捕捉穴の両方が針穴から離間する退避位置と、に移動可能であることを特徴とする。
The invention according to claim 3 is the sewing machine according to claim 1 or 2,
The sewing start end holding mechanism is
An upper thread catching hole and a lower thread catching hole are formed side by side along the slide direction, and the sewing start end of the lower thread and the sewing start end of the upper thread are sandwiched between opposing surfaces of the needle plate. It has a slide plate that can be held,
The slide plate includes an upper thread insertion position where the upper thread catching hole and the needle hole are overlapped, a lower thread insertion position where the lower thread catching hole and the needle hole are overlapped, the lower thread catching hole and the upper thread It is characterized in that both of the capture holes are movable to a retracted position where they are separated from the needle holes.
請求項4記載の発明は、請求項3記載のミシンにおいて、
前記スライド板は、前記退避位置において前記上糸及び前記下糸の縫い開始端部を前記針板の対向面との間に挟んで保持を行い、
前記制御装置は、第一針目の針落ち前に前記スライド板を下糸挿通位置に位置させ、前記エアーブロー機構により前記下糸の縫い開始端部を下側から前記針穴と前記下糸捕捉穴へ挿通させた後、前記スライド板を上糸挿通位置に位置させ、第一針目の針落ちで前記上糸の縫い開始端部を前記針穴と前記上糸捕捉穴へ挿入させた後、前記スライド板を退避位置に位置させ、第二針目の針落ち以降で前記第一の糸切り装置による前記上糸及び前記下糸の縫い開始端部の切断を行うように前記ミシンを制御することを特徴とする。
The invention according to claim 4 is the sewing machine according to claim 3,
The slide plate holds the upper thread and the lower thread at the retracted position by sandwiching the sewing thread start end between the needle plate and the opposing surface of the needle plate,
The control device positions the slide plate at the lower thread insertion position before the needle drop of the first stitch, and captures the needle thread and the lower thread from the lower end of the sewing start end of the lower thread by the air blow mechanism. After being inserted into the hole, the slide plate is positioned at the upper thread insertion position, and the sewing start end of the upper thread is inserted into the needle hole and the upper thread catching hole by the needle drop of the first stitch, The slide plate is positioned at the retracted position, and the sewing machine is controlled so that the first thread trimming device cuts the sewing start end of the upper thread and the lower thread after the needle drop of the second stitch. It is characterized by.
請求項5記載の発明は、請求項3又は4記載のミシンにおいて、
前記第一の糸切り装置のメスを前記スライド板よりも下方に配置し、
前記スライド板が退避位置の時、下方に移動して前記スライド板により引き出された前記上糸及び前記下糸の縫い開始端部をたぐり、前記第一の糸切り装置に係合させる糸たぐり機構を備え、
前記制御装置は、前記糸たぐり機構を下方に移動させた後に、前記第一の糸切り装置による前記上糸及び前記下糸の縫い開始端部の切断を行うように前記ミシンを制御することを特徴とする。
The invention according to claim 5 is the sewing machine according to claim 3 or 4,
The knife of the first thread trimming device is disposed below the slide plate,
When the slide plate is in the retracted position, the thread pulling mechanism that moves downward and traverses the sewing start ends of the upper thread and the lower thread pulled out by the slide plate and engages the first thread trimming device. With
The control device controls the sewing machine so as to cut a sewing start end portion of the upper thread and the lower thread by the first thread trimming device after moving the thread winding mechanism downward. Features.
請求項6記載の発明は、請求項3から5のいずれか一項に記載のミシンにおいて、
縫い終わりの下糸を切断すると共に切断された下糸の釜側の端部を次回の縫製の縫い開始端部として保持する第二の糸切り装置を備え、
前記下糸挿通機構は、
前記第二の糸切り装置による前記下糸の縫い開始端部の保持状態を解除する保持解除機構と、
前記下糸の縫い開始端部を前記針穴の下側に寄せる糸寄せ機構と、
を有することを特徴とする。
The invention according to claim 6 is the sewing machine according to any one of claims 3 to 5,
A second thread trimming device for cutting the lower thread at the end of sewing and holding the hook-side end of the cut lower thread as the sewing start end of the next sewing;
The lower thread insertion mechanism is
A holding release mechanism for releasing the holding state of the sewing start end of the lower thread by the second thread trimming device;
A thread shifting mechanism that brings the sewing start end of the lower thread closer to the lower side of the needle hole;
It is characterized by having.
請求項7記載の発明は、請求項6記載のミシンにおいて、
前記糸寄せ機構は、前進移動により前記下糸の縫い開始端部を前記針穴の下側に寄せる糸寄せ部材を有し、
当該糸寄せ部材は、先端部に形成された前記下糸の縫い開始端部を上方に移動させる第一の傾斜部と、前記先端部の上部に形成された前記下糸の縫い開始端部を捕捉する凹部と、当該凹部の内側に形成された前記下糸の縫い開始端部を下方に移動させる第二の傾斜部とを備え、
前記第一の傾斜部の上端部よりも前記第二の傾斜部の上端部の方が高くなるように形成されていることを特徴とする。
The invention according to claim 7 is the sewing machine according to claim 6,
The thread shifting mechanism has a thread shifting member that moves a sewing start end of the lower thread toward the lower side of the needle hole by forward movement,
The thread shifting member includes a first inclined portion that moves the sewing start end portion of the lower thread formed at the front end portion upward, and a sewing start end portion of the lower thread formed at the upper portion of the front end portion. A concave portion to be captured, and a second inclined portion that moves the sewing start end portion of the lower thread formed inside the concave portion downward,
The upper end portion of the second inclined portion is formed to be higher than the upper end portion of the first inclined portion.
請求項8記載の発明は、請求項6又は7記載のミシンにおいて、
前記制御装置は、
前記エアーブロー機構により前記下糸の縫い開始端部を下側から前記針穴と前記下糸捕捉穴へ挿通させる前までに、前記糸寄せ機構を駆動して前記下糸の縫い開始端部を前記針穴の下側に寄せると共に前記縫い開始端部保持解除機構を駆動して前記第二の糸切り装置による前記下糸の縫い開始端部の保持状態を解除するように前記ミシンを制御することを特徴とする。
The invention according to claim 8 is the sewing machine according to claim 6 or 7,
The control device includes:
Before the sewing start end of the lower thread is inserted from the lower side into the needle hole and the lower thread catching hole by the air blow mechanism, the thread shifting mechanism is driven to set the lower thread sewing start end. The sewing machine is controlled so as to approach the lower side of the needle hole and drive the sewing start end holding release mechanism to release the holding state of the sewing start end of the lower thread by the second thread trimming device. It is characterized by that.
本発明のミシンは、下糸挿通機構により下糸の縫い開始端部を下側から吹き上げて針穴に挿通し、当該下糸の縫い開始端部を針板の上側で縫い開始端部保持機構が保持し、第一の糸切り装置が保持された下糸の縫い開始端部を切断するので、手作業に頼ることなく、被縫製物から下糸の縫い開始端部を切断することができ、被縫製物に残る下糸の縫い開始端部を短くすることができ、縫い品質の向上を図ることが可能となる。また、手作業を不要とするので、下糸の縫い開始端部の切断作業の負担を解消することが可能となる。   The sewing machine of the present invention blows the sewing start end of the lower thread from the lower side by the lower thread insertion mechanism and inserts it into the needle hole, and holds the sewing start end of the lower thread on the upper side of the needle plate. Is held and the first thread trimming device holds the lower thread sewing start end, so it is possible to cut the lower thread sewing start end from the work piece without relying on manual work. Thus, the sewing start end portion of the lower thread remaining on the workpiece can be shortened, and the sewing quality can be improved. Further, since manual work is not required, it is possible to eliminate the burden of cutting work at the sewing thread start end of the lower thread.
総合送りミシンの縫い針周辺の構成を示す側面図である。It is a side view which shows the structure of the sewing needle periphery of a general feed sewing machine. ミシンのベッド部の立胴部側とは逆側の端部の平面図である。It is a top view of the edge part on the opposite side to the standing body part side of the bed part of a sewing machine. ミシンの制御系を示すブロック図である。It is a block diagram which shows the control system of a sewing machine. 水平釜の周辺の構成を示す側面図である。It is a side view which shows the structure of the periphery of a horizontal shuttle. 糸寄せ機構の斜視図である。It is a perspective view of a yarn gathering mechanism. 糸寄せ機構の平面図である。It is a top view of a yarn gathering mechanism. 図7(A)は下糸が低位置にある場合の糸寄せフックの動作前後の位置を示す拡大平面図、図7(B)は下糸が高位置にある場合の糸寄せフックの動作前後の位置を示す拡大平面図である。FIG. 7A is an enlarged plan view showing the position before and after the operation of the yarn pulling hook when the lower thread is in the low position, and FIG. 7B is the operation before and after the operation of the yarn moving hook when the lower thread is in the high position. It is an enlarged plan view which shows the position. エアーブロー機構のノズルの後退状態と水平釜の周辺の構成を示す斜視図ある。It is a perspective view which shows the retraction state of the nozzle of an air blow mechanism, and the structure of the periphery of a horizontal hook. エアーブロー機構のノズルの進出状態と水平釜の周辺の構成を示す斜視図ある。It is a perspective view which shows the advancing state of the nozzle of an air blow mechanism, and the structure of the periphery of a horizontal hook. 平型のノズルの斜視図である。It is a perspective view of a flat type nozzle. 平型のノズルの断面図である。It is sectional drawing of a flat type nozzle. 丸型のノズルの斜視図である。It is a perspective view of a round nozzle. 丸型のノズルの断面図である。It is sectional drawing of a round nozzle. 針板の平面図である。It is a top view of a needle plate. 下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。It is a perspective view of the periphery of a needle plate showing the cutting operation of the sewing start end of the lower thread and the upper thread. 図15に続く下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。FIG. 16 is a perspective view of the periphery of the needle plate showing the cutting operation of the sewing start end portions of the lower thread and the upper thread following FIG. 15. 図16に続く下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。FIG. 17 is a perspective view around the needle plate showing the cutting operation of the sewing start end of the lower thread and the upper thread following FIG. 16. 図17に続く下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。FIG. 18 is a perspective view of the periphery of the needle plate showing the cutting operation of the sewing start end portions of the lower thread and the upper thread following FIG. 17. 図18に続く下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。FIG. 19 is a perspective view of the periphery of the needle plate showing the cutting operation of the sewing start end portions of the lower thread and the upper thread following FIG. 18. 図19に続く下糸及び上糸の縫い開始端部の切断動作を示す針板周辺の斜視図である。FIG. 20 is a perspective view around the needle plate showing the cutting operation of the sewing start end of the lower thread and the upper thread following FIG. 19. 第一の糸切り装置の斜視図である。It is a perspective view of the 1st thread trimming device. 第一の糸切り装置の動メス及び固定メスの糸切り動作を示す斜視図である。It is a perspective view which shows the thread trimming operation | movement of the moving knife and fixed knife of a 1st thread trimming apparatus. 図22に続く第一の糸切り装置の動メス及び固定メスの糸切り動作を示す斜視図である。It is a perspective view which shows the thread trimming operation | movement of the moving knife and fixed knife of the 1st thread trimming device following FIG. 図23に続く第一の糸切り装置の動メス及び固定メスの糸切り動作を示す斜視図である。It is a perspective view which shows the thread trimming operation | movement of the moving knife and fixed knife of the 1st thread trimming device following FIG. 第一の糸切り装置の動メス及び固定メスの糸切り動作を示す側面図である。It is a side view which shows the thread trimming operation | movement of the moving knife and fixed knife of a 1st thread trimming apparatus. 図26(A)は下糸及び上糸の縫い開始端部の切断動作を示す動作説明図であり、図26(B)は図26(A)に続く動作説明図であり、図26(C)は図26(B)に続く動作説明図である。26A is an operation explanatory view showing the cutting operation of the sewing start end of the lower thread and the upper thread, and FIG. 26B is an operation explanatory view subsequent to FIG. 26A, and FIG. ) Is an explanatory diagram of operation following FIG. 図27(A)は図26(C)に続く下糸及び上糸の縫い開始端部の切断動作を示す動作説明図であり、図27(B)は図27(A)に続く動作説明図であり、図27(C)は図27(B)に続く動作説明図である。FIG. 27A is an operation explanatory view showing the cutting operation of the sewing start end of the lower thread and the upper thread following FIG. 26C, and FIG. 27B is an operation explanatory view following FIG. 27A. FIG. 27C is an operation explanatory diagram following FIG. 図28(A)は図27(C)に続く下糸及び上糸の縫い開始端部の切断動作を示す動作説明図であり、図28(B)は図28(A)に続く動作説明図であり、図28(C)は図28(B)に続く動作説明図である。FIG. 28A is an operation explanatory view showing the cutting operation of the sewing start end of the lower thread and the upper thread following FIG. 27C, and FIG. 28B is an operation explanatory view following FIG. FIG. 28C is an operation explanatory diagram following FIG. 図29は図28(C)に続く下糸及び上糸の縫い開始端部の切断動作を示す動作説明図である。FIG. 29 is an operation explanatory view showing the cutting operation of the sewing start end portions of the lower thread and the upper thread following FIG. 下糸及び上糸の縫い開始端部の切断動作の制御を示すフローチャートである。It is a flowchart which shows control of the cutting | disconnection operation | movement of the sewing start end part of a lower thread and an upper thread. 糸たぐり機構の他の例の斜視図である。It is a perspective view of the other example of a thread take-up mechanism. 縫い開始端部保持機構の他の例の平面図である。It is a top view of the other example of a sewing start end part holding mechanism. 縫い開始端部保持機構の他の例の斜視図である。It is a perspective view of the other example of a sewing start edge part holding mechanism. 糸たぐり部材の規制板を示す斜視図である。It is a perspective view which shows the control board of a thread thread member.
[ミシンの概略]
以下、図面を参照して、本発明にミシン10について説明する。ミシン10は、いわゆる総合送りミシンであり、図1に示すように、上下動を行うと共に布送り方向に沿って揺動する針棒及び縫い針11(図18参照)と、針棒に同期して上下動及び前後の揺動を行う送り足12と、送り足12と交互に上下動を行う押さえ足13と、針棒に同期して周期的に送り方向に移動する送り歯14とを備えている。
即ち、総合送りミシンは、送り足12には縫い針11を挿通させる貫通穴12aが形成され、送り歯14には縫い針11を挿通させる針穴15が形成されている。
そして、縫い針11及び送り足12が下降する際に送り歯14が上昇し、これらは全て布送り方向前側に向かって移動する。これにより、布地は送り足12と送り歯14とにより挟持されながら縫い針11が突き通されて布送り方向の前側に送られる。
また、縫い針11及び送り足12が上昇する際に押さえ足13は下降して、押さえ足13が布地を上から押さえている間に縫い針11及び送り足12が後退し、再び被縫製物を送りながら針落ちを行う。
[Outline of sewing machine]
Hereinafter, the sewing machine 10 according to the present invention will be described with reference to the drawings. The sewing machine 10 is a so-called general feed sewing machine, and as shown in FIG. 1, is synchronized with the needle bar and the needle bar and the sewing needle 11 (see FIG. 18) that move up and down and swing along the cloth feed direction. A feed leg 12 that moves up and down and swings back and forth, a presser foot 13 that moves up and down alternately with the feed leg 12, and a feed dog 14 that periodically moves in the feed direction in synchronization with the needle bar. ing.
That is, in the total feed sewing machine, a through hole 12a through which the sewing needle 11 is inserted is formed in the feed leg 12, and a needle hole 15 through which the sewing needle 11 is inserted is formed in the feed dog 14.
Then, when the sewing needle 11 and the feed leg 12 are lowered, the feed dog 14 is raised, and these all move toward the front side in the cloth feed direction. Thereby, the sewing needle 11 is pierced while the fabric is held between the feed leg 12 and the feed dog 14 and fed to the front side in the fabric feed direction.
Further, when the sewing needle 11 and the feed foot 12 are raised, the presser foot 13 is lowered, and while the presser foot 13 is pressing the fabric from above, the sewing needle 11 and the feed foot 12 are retracted, and again the sewing product. Perform needle entry while feeding.
なお、総合送りミシンの場合には、周回運動を行う送り歯14に針穴15が形成されており、針穴15の位置は送り歯14の周回運動と共に変動するが、以下の説明において、針穴15との相対的な位置関係を説明する記述は、特にことわりがない限り、送り歯14が上軸角度0°(針棒上死点)に位置する場合の針穴15の位置であることを前提とする。
また、ミシン10は、総合送りミシンとして通常備えている構成、例えば、針棒の上下動機構、布地の送り機構、釜の駆動機構、糸調子、天秤等を全て具備しているが、これらは周知の構成であるため、詳細な説明は省略する。
また、以下の説明では、ミシン10を水平面上に置いた状態で鉛直上方を「上」、鉛直下方を「下」、布送り方向下流側を「前」、布送り方向上流側(オペレータ側)を「後」、前方を向いた状態で左手側を「左」、前方を向いた状態で右手側を「右」とする。
In the case of the general feed sewing machine, the needle hole 15 is formed in the feed dog 14 that performs the orbiting motion, and the position of the needle hole 15 varies with the orbiting motion of the feed dog 14. The description explaining the relative positional relationship with the hole 15 is the position of the needle hole 15 when the feed dog 14 is located at an upper shaft angle of 0 ° (needle bar top dead center) unless otherwise specified. Assuming
Further, the sewing machine 10 has a configuration normally provided as a general feed sewing machine, for example, a needle bar vertical movement mechanism, a cloth feed mechanism, a shuttle driving mechanism, a thread tension, a balance, etc. Since it is a known configuration, a detailed description is omitted.
Further, in the following description, with the sewing machine 10 placed on a horizontal plane, “up” in the vertical direction, “down” in the vertical direction, “front” in the cloth feed direction downstream, and upstream in the cloth feed direction (operator side) Is “back”, the left hand side is “left” when facing forward, and the right hand side is “right” when facing forward.
図2はミシン10のベッド部16の立胴部側とは逆側(左側)の端部の平面図であり、上面カバーと内部の一部の構成の図示を省略している。また、図3はミシンの全体構成を示すブロック部である。
図示のように、ミシン10は、ミシンベッド部16の上部に設けられた針板17と、針板17の右下側に設けられた水平釜18と、下糸の縫い開始端部を下側から針穴15に挿通する下糸挿通機構2と、針穴15に通された下糸及び上糸の縫い開始端部をそれぞれ針板17の上側で保持する縫い開始端部保持機構50と、縫い開始端部保持機構50に保持された下糸の縫い開始端部を切断する第一の糸切り装置60と、縫い終わりの下糸を切断すると共に切断された下糸の釜側の端部を次回の縫いの縫い開始端部として保持する第二の糸切り装置70と、縫い開始端部保持機構50のスライド板51によりスライド方向に引き出された上糸及び下糸の縫い開始端部を下方にたぐる糸たぐり機構80と、第一の糸切り装置60により切除された下糸及び上糸の切除片を捕集する捕集機構19と、ミシン10の各構成を制御する制御装置110とを備えている。
FIG. 2 is a plan view of an end portion (left side) opposite to the standing body portion side of the bed portion 16 of the sewing machine 10, and illustration of a part of the configuration of the upper surface cover and the inside is omitted. FIG. 3 is a block diagram showing the overall configuration of the sewing machine.
As shown in the figure, the sewing machine 10 includes a needle plate 17 provided on the upper portion of the sewing machine bed portion 16, a horizontal hook 18 provided on the lower right side of the needle plate 17, and a sewing start end portion of the lower thread on the lower side. A lower thread insertion mechanism 2 that is inserted through the needle hole 15, a sewing start end holding mechanism 50 that holds the sewing start ends of the lower thread and the upper thread passed through the needle hole 15 on the upper side of the needle plate 17, respectively. A first thread trimming device 60 that cuts the sewing start end of the lower thread held by the sewing start end holding mechanism 50, and a hook side end of the lower thread that has been cut and cut at the sewing thread end. Are held as the sewing start end of the next sewing, and the sewing start ends of the upper and lower threads pulled out in the sliding direction by the slide plate 51 of the sewing start end holding mechanism 50. Cut off by the thread threading mechanism 80 that hangs downward and the first thread trimming device 60. And the collection mechanism 19 for collecting the cut pieces of yarn and the upper yarn, and a control unit 110 for controlling each configuration of the sewing machine 10.
また、上記下糸挿通機構2は、第二の糸切り装置70による下糸の縫い開始端部の保持状態を解除する保持解除機構20と、下糸の縫い開始端部を針穴15の下側に寄せる糸寄せ機構30と、保持状態が解除された下糸の縫い開始端部をエアーにより針穴15に挿通させるエアーブロー機構40とを有する構成となっている。   The lower thread insertion mechanism 2 includes a holding release mechanism 20 for releasing the holding state of the lower thread sewing start end by the second thread trimming device 70, and a lower thread sewing start end part below the needle hole 15. It has the structure which has the thread | yarn gathering mechanism 30 approached to the side, and the air blow mechanism 40 which inserts the sewing start end part of the lower thread | thread with which the holding state was cancelled | released to the needle hole 15 with air.
また、前述したように、ミシン10は、針棒及び縫い針11に上下動及び前後方向の揺動を付与する針上下動機構、送り足12及び押さえ足13を交互に上下動させる押さえ上下動機構、送り歯14を針板17の開口から出没させると共に前後に送る布送り機構、水平釜18を縫い針11の上下動の二倍速で回転駆動する釜機構等を備えており、これらはいずれもミシンモーターを共通の駆動源としている。
以下、上記各構成について順番に説明する。
Further, as described above, the sewing machine 10 has a needle up-and-down movement mechanism that gives the needle bar and the sewing needle 11 up-and-down movement and back-and-forth movement, and a presser up-and-down movement that alternately moves the feed leg 12 and the presser foot 13 up and down. A mechanism for feeding and retracting the feed dog 14 from the opening of the needle plate 17 and feeding it back and forth, a hook mechanism for rotating the horizontal hook 18 at a double speed of the vertical movement of the sewing needle 11, and the like. The sewing machine motor is a common drive source.
Hereafter, each said structure is demonstrated in order.
[第二の糸切り装置]
図4は水平釜18の周辺の構成を示す側面図、図8は斜視図である。図2〜図4及び図8に示すように、第二の糸切り装置70は、針板17よりも低位置であって針穴15に対して前方に配置されている。そして、第二の糸切り装置70は、鈎状の動メス71と、ミシンフレームに固定された固定メス72と、動メス71を固定メス72側に押圧する板バネ73とを備えている。
この第二の糸切り装置70は、最終針の針落ち後に針穴15から水平釜18に渡る上糸及び下糸を捕捉して切断すると共に、切断後の下糸の端部を保持する。この下糸端部は、次回の縫いにおける縫い開始端部となる。
[Second thread trimming device]
4 is a side view showing the configuration around the horizontal hook 18, and FIG. 8 is a perspective view. As shown in FIGS. 2 to 4 and 8, the second thread trimming device 70 is positioned lower than the needle plate 17 and forward of the needle hole 15. The second thread trimming device 70 includes a hook-shaped moving knife 71, a fixed knife 72 fixed to the sewing machine frame, and a leaf spring 73 that presses the moving knife 71 toward the fixed knife 72.
The second thread trimming device 70 captures and cuts the upper thread and the lower thread from the needle hole 15 to the horizontal hook 18 after the last needle drop, and holds the end of the lower thread after the cutting. This lower thread end portion becomes a sewing start end portion in the next sewing.
動メス71は前後方向に長尺であってその先端部を後方に向けた状態でリンクを介して第二の糸切りソレノイド74に連結されており、第二の糸切りソレノイド74によって後方に向かって進み、上糸及び下糸を捕捉して前方に向かって下の位置に戻る往復動作を行う。
このため、動メス71の先端部は尖鋭形状であり、先端部近傍には鈎状の返し部が形成されており、返し部の内側には前方に刃先が向けられた切刃が形成されている。
The moving knife 71 is long in the front-rear direction and is connected to the second thread trimming solenoid 74 via a link in a state in which the front end portion is directed rearward. The reciprocating operation is performed to capture the upper thread and the lower thread and return to the lower position toward the front.
For this reason, the tip of the moving knife 71 has a sharp shape, a hook-like return portion is formed in the vicinity of the tip, and a cutting blade with a cutting edge directed forward is formed inside the return portion. Yes.
固定メス72は、動メス71の上側に配置され、その下面が当該動メス71の上面に摺接する。固定メス72は後方に向かって延出された片持ち梁状であって、その先端部には後方に刃先が向けられた切刃が形成されている。これにより、往復の往路で動メス71が返し部により捕捉した上糸及び下糸を、往復の復路で動メス71の切刃と固定メス72の切刃とで挟み込んで切断する。   The fixed knife 72 is arranged on the upper side of the moving knife 71 and its lower surface is in sliding contact with the upper surface of the moving knife 71. The fixed knife 72 has a cantilever shape extending rearward, and a cutting edge with a cutting edge directed rearward is formed at a tip portion thereof. Thereby, the upper thread and the lower thread captured by the moving knife 71 on the return path in the reciprocating forward path are sandwiched between the cutting blade of the moving knife 71 and the cutting edge of the fixed knife 72 in the reciprocating return path.
板バネ73は、動メス71の下側から上方に押圧するので、動メス71を固定メス72に押しつけることができ、これらに隙間が生じることを防止し、より確実な切断を可能とする。
また、板バネ73により、切断後の下糸の釜側の端部(次回の縫製の縫い開始端部)を動メス71と板バネ73との間に挟んで保持することができ、下糸の縫い開始端部の所在を明確にすることができる。
Since the leaf spring 73 presses upward from the lower side of the moving knife 71, the moving knife 71 can be pressed against the fixed knife 72, and a gap is prevented from occurring between them, thereby enabling more reliable cutting.
Further, the leaf spring 73 can hold the hook-side end of the lower thread after cutting (the sewing start end of the next sewing) between the moving knife 71 and the leaf spring 73, so that the lower thread The location of the sewing start end can be clarified.
[糸寄せ機構]
糸寄せ機構30は、下糸の縫い開始端部をエアーブロー機構40が針穴15を通して上方に挿通させることができるように適正な位置に誘導する機能と、水平釜18の内部のボビンから適正な長さの下糸を繰り出させる機能とを有している。
図5は糸寄せ機構30の斜視図、図6は後述する糸寄せフック31の動作前後の位置を示す拡大平面図、図7は糸寄せフック31の先端部における下糸の挙動を示す説明図である。図2及び図5に示すように、糸寄せ機構30は、針板17よりも低位置であって針穴15に対して後方且つ幾分左寄りに配置されている。
[Thread gathering mechanism]
The thread shifting mechanism 30 has a function for guiding the lower thread sewing start end to an appropriate position so that the air blow mechanism 40 can be inserted upward through the needle hole 15 and an appropriate bobbin inside the horizontal hook 18. It has a function of feeding a bobbin thread of a long length.
5 is a perspective view of the yarn gathering mechanism 30, FIG. 6 is an enlarged plan view showing positions before and after the operation of the yarn gathering hook 31, which will be described later, and FIG. 7 is an explanatory diagram showing the behavior of the lower yarn at the tip of the yarn gathering hook 31. It is. As shown in FIGS. 2 and 5, the yarn shifting mechanism 30 is disposed at a position lower than the needle plate 17 and rearward and somewhat leftward with respect to the needle hole 15.
上記糸寄せ機構30は、進退動作により水平釜18から第二の糸切り装置70に渡る下糸の縫い開始端部を捕捉する糸寄せ部材としての糸寄せフック31と、当該糸寄せフック31を進退移動させる第一の糸寄せエアシリンダー32と、糸寄せ機構30全体を支持する支持板33と、第一の糸寄せエアシリンダー32を支持板33に対して所定方向に沿って滑動可能とする支持部材34と、支持板33に対して第一の糸寄せエアシリンダー32を前述した所定方向に沿って往復駆動させる第二の糸寄せエアシリンダー35とを備えている。   The yarn gathering mechanism 30 includes a yarn gathering hook 31 as a yarn gathering member that captures a sewing start end portion of a lower thread passing from the horizontal hook 18 to the second thread trimming device 70 by advancing and retreating operation, and the yarn gathering hook 31. The first yarn gathering air cylinder 32 that moves forward and backward, the support plate 33 that supports the entire yarn gathering mechanism 30, and the first yarn gathering air cylinder 32 are slidable along the predetermined direction with respect to the support plate 33. A support member 34 and a second yarn gathering air cylinder 35 that reciprocates the first yarn gathering air cylinder 32 along the predetermined direction described above with respect to the support plate 33 are provided.
支持板33は、ミシンベッド部16に対して水平となるように取り付けられており、第一の糸寄せエアシリンダー32の進退動作方向をガイドする長穴331が形成されている。この長穴331は、右斜め前の方向に沿って形成されており、第一の糸寄せエアシリンダー32が第二の糸寄せエアシリンダー35により押し出されると、前進しつつ右方に寄る方向に移動する。
支持部材34は、長穴331内を滑動する図示しない滑動体と支持板33の背面側で第一の糸寄せエアシリンダー32が脱落しないように保持する保持板とからなり、支持板33に対して第一の糸寄せエアシリンダー32が進退移動可能に連結している。
The support plate 33 is attached so as to be horizontal with respect to the sewing machine bed portion 16, and a long hole 331 for guiding the advancing / retreating operation direction of the first yarn moving air cylinder 32 is formed. The elongated hole 331 is formed along a diagonally forward right direction. When the first yarn gathering air cylinder 32 is pushed out by the second yarn gathering air cylinder 35, the elongated hole 331 moves forward while moving forward. Moving.
The support member 34 includes a sliding body (not shown) that slides in the elongated hole 331 and a holding plate that holds the first yarn pulling air cylinder 32 on the back side of the support plate 33 so as not to drop off. The first yarn gathering air cylinder 32 is connected so as to be movable back and forth.
支持板33に支持された第一の糸寄せエアシリンダー32は、そのプランジャーの進退方向と糸寄せフック31の長手方向とが一致する状態で保持しており、また、プランジャーの進退方向は、前述した長穴331に比べて右成分がより少ない右斜め前側に沿っている。   The first yarn pulling air cylinder 32 supported by the support plate 33 holds the plunger in a state where the advancement / retraction direction of the plunger and the longitudinal direction of the yarn pickup hook 31 coincide with each other. , Along the diagonally forward right side with a smaller right component than the long hole 331 described above.
第一と第二の糸寄せエアシリンダー32,35により、糸寄せフック31は退避位置から二段階で右斜め前に移動する。
図6における実線で示した糸寄せフック31及び下糸は第一及び第二の糸寄せエアシリンダー32,35の両方を前進駆動させた状態における位置を示し、二点鎖線で示した糸寄せフック31及び下糸は両方の糸寄せエアシリンダー32,35を前進駆動させた状態から第二の糸寄せエアシリンダー35のみを後退させた状態における位置を示す。
糸寄せフック31は最前進することにより、その先端部が水平釜18から第二の糸切り装置70に間に渡る下糸と交差する位置に到達する。
また、第一と第二の糸寄せエアシリンダー32,35の両方を前進させた状態から第二の糸寄せエアシリンダー35のみを後退させることにより、水平釜18から第二の糸切り装置70に渡る下糸をエアーブロー機構40のノズル41の先端部と針穴15の間を通過する経路に寄せることができる。
By the first and second yarn gathering air cylinders 32 and 35, the yarn gathering hook 31 is moved diagonally rightward in two steps from the retracted position.
The yarn gathering hook 31 and the lower yarn shown by the solid line in FIG. 6 indicate the positions in the state where both the first and second yarn gathering air cylinders 32 and 35 are driven forward, and the yarn gathering hook shown by the two-dot chain line. Reference numeral 31 and lower thread indicate positions in a state in which only the second yarn gathering air cylinder 35 is retracted from a state in which both yarn gathering air cylinders 32 and 35 are driven forward.
When the yarn gathering hook 31 is moved forward most, the leading end of the yarn catching hook 31 reaches a position where it intersects with the lower yarn passing between the horizontal hook 18 and the second thread trimming device 70.
Further, by moving only the second yarn gathering air cylinder 35 from the state where both the first and second yarn gathering air cylinders 32 and 35 are advanced, the horizontal hook 18 moves to the second yarn trimming device 70. The crossing lower thread can be brought to a path passing between the tip of the nozzle 41 of the air blow mechanism 40 and the needle hole 15.
糸寄せフック31の先端部は、図7に示すように、先端部に形成された下糸の縫い開始端部を上方に移動させる第一の傾斜部311と、先端部の上部に形成された下糸の縫い開始端部を捕捉する凹部312と、当該凹部312の内側における後端部側(先端部側の逆側)に形成された下糸の縫い開始端部を下方に移動させる第二の傾斜部313と、凹部312内において第二の傾斜部313と対向する第三の傾斜部314とを備えており、第一の傾斜部311の上端部よりも第二の傾斜部313の上端部の方が高くなるように形成されている。   As shown in FIG. 7, the tip portion of the yarn hook 31 is formed at a first inclined portion 311 for moving the sewing start end portion of the lower thread formed at the tip portion upward and an upper portion of the tip portion. A recess 312 that captures the sewing start end of the lower thread, and a second that moves the sewing start end of the lower thread formed on the rear end side (the opposite side of the front end side) inside the recess 312 downward. And the third inclined portion 314 facing the second inclined portion 313 in the recess 312, and the upper end of the second inclined portion 313 is higher than the upper end portion of the first inclined portion 311. The part is formed to be higher.
第一の傾斜部311は、傾斜角度θ1に示すように鋭角であって、後方に向かうにつれて上昇する方向に傾斜しており、糸寄せフック31の前進時に第一の傾斜部311に当接した下糸を上方に押し上げることができる。
第二の傾斜部313は、傾斜角度θ2に示すように鈍角であって、後方に向かうにつれて下降する方向に傾斜しており、また、第二の傾斜部313の上端部は第一の傾斜部311の上端部よりも高く形成されている。このため、糸寄せフック31の前進時に、第一の傾斜部311によって押し上げられた下糸を下降させて凹部312内に導くことができる。
第三の傾斜部314は、傾斜角度θ3に示すように鈍角であって、後方に向かうにつれて下降する方向に傾斜しており、その上端部は第一の傾斜部311と同じ高さである。このため、糸寄せフック31の後退時に、凹部312内に導かれた下糸を捕捉し、凹部312から下糸が不慮に抜け出ることを防止する。
The first inclined portion 311 has an acute angle as shown by the inclination angle θ1 and is inclined in a direction that rises toward the rear. The first inclined portion 311 contacts the first inclined portion 311 when the yarn moving hook 31 moves forward. The lower thread can be pushed upward.
The second inclined portion 313 is an obtuse angle as indicated by an inclination angle θ2 and is inclined in a direction of descending toward the rear, and the upper end portion of the second inclined portion 313 is the first inclined portion. It is formed higher than the upper end portion of 311. For this reason, the lower thread pushed up by the first inclined portion 311 can be lowered and guided into the recess 312 when the yarn moving hook 31 moves forward.
The third inclined portion 314 has an obtuse angle as indicated by an inclination angle θ3 and is inclined in a direction of descending toward the rear, and the upper end portion thereof is the same height as the first inclined portion 311. For this reason, when the yarn gathering hook 31 moves backward, the lower thread guided into the recess 312 is captured, and the lower thread is prevented from accidentally coming out of the recess 312.
これらの構造により、糸寄せフック31は、下糸が第一の傾斜部311の上端部よりも低位置にあるときには、図7(A)に示すように、糸寄せフック31の前進により、下糸を第一の傾斜部311に当接させて上方に押し上げ、さらに、第二の傾斜部313により捕捉して凹部312内に導き込むことができる。そして、糸寄せフック31を後退させると、凹部312内の下糸は第三の傾斜部314によって捕捉され、凹部312から抜け出さないように保持される。なお、凹部312内の下糸は後述するエアーブロー機構により上方に吹き上げられるが、その際には第三の傾斜部314に沿って移動するので、移動は妨げられない構造となっている。   With these structures, when the lower thread is at a lower position than the upper end of the first inclined portion 311, the yarn gathering hook 31 is moved downward by the advancement of the yarn gathering hook 31 as shown in FIG. The yarn can be pushed up by being brought into contact with the first inclined portion 311 and further captured by the second inclined portion 313 and guided into the recess 312. When the yarn catching hook 31 is moved backward, the lower thread in the recess 312 is captured by the third inclined portion 314 and held so as not to come out of the recess 312. The lower thread in the recess 312 is blown upward by an air blow mechanism, which will be described later. At this time, the lower thread moves along the third inclined portion 314, so that the movement is not hindered.
また、下糸が第一の傾斜部311の上端部よりも高位置であっても第二の傾斜部313よりも低位置である場合には、図7(B)に示すように、糸寄せフック31の前進により、下糸を直接的に第二の傾斜部313に当接させて凹部312内に導き込むことができる。糸寄せフック31の後退時の下糸の挙動は図7(A)の場合と同一である。   Further, when the lower thread is higher than the upper end of the first inclined portion 311 but is lower than the second inclined portion 313, as shown in FIG. As the hook 31 advances, the lower thread can be directly brought into contact with the second inclined portion 313 and guided into the recess 312. The behavior of the lower thread when the thread gathering hook 31 moves backward is the same as that in the case of FIG.
[エアーブロー機構]
図8はエアーブロー機構40のノズル41の後退状態を示す斜視図、図9はエアーブロー機構40のノズル41の進出状態を示す斜視図である。
これらの図に示すように、エアーブロー機構40は、針穴15の下方から当該針穴15に向けて先端部からエアーを吐出するノズル41と、ノズル41を着脱可能に保持すると共にエアーの供給源(コンプレッサー等)に接続されたノズル保持部43と、ノズル保持部43を介してノズル41を進退移動させるノズル昇降エアシリンダー44と、エアーの供給源からノズル保持部43へのエアーの供給と停止を切り替える切替弁45(図3参照)とを備えている。
[Air blow mechanism]
FIG. 8 is a perspective view showing a retracted state of the nozzle 41 of the air blow mechanism 40, and FIG. 9 is a perspective view showing an advanced state of the nozzle 41 of the air blow mechanism 40.
As shown in these drawings, the air blow mechanism 40 includes a nozzle 41 that discharges air from the lower end of the needle hole 15 toward the needle hole 15, a nozzle 41 that is detachably held, and a supply of air. A nozzle holding part 43 connected to a source (compressor or the like), a nozzle lifting / lowering air cylinder 44 for moving the nozzle 41 forward / backward via the nozzle holding part 43, and air supply from the air supply source to the nozzle holding part 43; The switching valve 45 (refer FIG. 3) which switches a stop is provided.
ノズル保持部43は、筒状のノズル挿入部431と当該ノズル挿入部431をノズル昇降エアシリンダー44のプランジャーに連結する枠部432とを備えている。
ノズル挿入部431は、ノズル41を挿入可能であり、ネジによりノズル41を固定することができる。また、ネジを緩めることでノズル41の取り外しを容易に行うことができ、平型のノズル41から後述する丸型のノズル42に交換することもできるようになっている。
また、このノズル保持部43には、エアー供給用のホースが接続されており、供給されるエアーによってノズル41の先端部からのエアーの吐出を可能とする。
The nozzle holding portion 43 includes a cylindrical nozzle insertion portion 431 and a frame portion 432 that connects the nozzle insertion portion 431 to the plunger of the nozzle lifting / lowering air cylinder 44.
The nozzle insertion part 431 can insert the nozzle 41, and can fix the nozzle 41 with a screw. Further, the nozzle 41 can be easily removed by loosening the screw, and the flat nozzle 41 can be replaced with a round nozzle 42 described later.
Further, an air supply hose is connected to the nozzle holding portion 43 so that air can be discharged from the tip of the nozzle 41 by the supplied air.
ノズル保持部43に保持されたノズル41は、前斜め上を向いた状態となる。そして、ノズル昇降エアシリンダー44のプランジャーはノズル41の長手方向と同じ方向に沿ってノズル41に進退移動を付与することができる。そして、図9に示すように、ノズル昇降エアシリンダー44のプランジャーの進出状態において、ノズル41の先端部を針穴15の真下に近接した状態することができる。   The nozzle 41 held by the nozzle holding portion 43 is in a state of facing front obliquely upward. And the plunger of the nozzle raising / lowering air cylinder 44 can give the nozzle 41 forward / backward movement along the same direction as the longitudinal direction of the nozzle 41. As shown in FIG. 9, when the plunger of the nozzle lifting / lowering air cylinder 44 is advanced, the tip of the nozzle 41 can be brought close to the needle hole 15.
ノズル41は、図10及び図11に示すように、その先端部が概ね左右方向に沿った平型の開口部を有し、エアーを絞って高速で吹き出すことができる。また、ノズル41の先端部における幅方向の中間にはスリット部411が形成されており、ノズル41の進出移動時に下糸の縫い開始端部を内側に収容することができる。即ち、ノズル41の進出時に、前述した糸寄せ機構30の糸寄せフック31に寄せられた下糸の縫い開始端部が、丁度、スリット部411に収容されるようにエアーブロー機構40は配置されている。   As shown in FIGS. 10 and 11, the nozzle 41 has a flat opening whose tip is substantially along the left-right direction and can blow out air at high speed. Further, a slit portion 411 is formed in the middle in the width direction at the tip portion of the nozzle 41, and the sewing start end portion of the lower thread can be accommodated inside when the nozzle 41 moves forward. That is, when the nozzle 41 advances, the air blow mechanism 40 is arranged so that the sewing start end portion of the lower thread that is brought close to the yarn gathering hook 31 of the yarn gathering mechanism 30 is received in the slit portion 411. ing.
また、ノズル41は、図12及び図13に示す丸型のノズル42に交換することが可能である。この丸型のノズル42もその先端部にスリット部421が形成され、下糸を収容可能となっている。
この丸型のノズル42は、開口部が広くなっていることから広範囲に吹き付けを行うことができる。
The nozzle 41 can be replaced with a round nozzle 42 shown in FIGS. This round nozzle 42 also has a slit 421 formed at the tip thereof, and can accommodate a lower thread.
The round nozzle 42 can be sprayed over a wide range since the opening is wide.
[保持解除機構]
保持解除機構20は、図4及び図8に示すように、第二の糸切り装置70の板バネ73を係止する係止部材21と、係止部材21を昇降させる解除エアシリンダー22とを備えている。
係止部材21は鉛直上下方向に沿って配設され、その上端部が右方に直角に屈曲している。そして、係止部材21の上端部の屈曲部211は、板バネ73の長手方向の中間部の上面に上方から近接対向するように配置されている。
解除エアシリンダー22は、屈曲部211が板バネ73の上面に近接対向する位置にある係止部材21を下降させる方向に駆動し、係止部材21を介して板バネ73を下方に引き下げることができる。
この引き下げにより、板バネ73の先端部が動メス71から離間し、動メス71との間で挟持していた下糸の縫い開始端部を解放する。
[Release mechanism]
As shown in FIGS. 4 and 8, the holding release mechanism 20 includes a locking member 21 that locks the leaf spring 73 of the second thread trimming device 70, and a release air cylinder 22 that lifts and lowers the locking member 21. I have.
The locking member 21 is disposed along the vertical vertical direction, and its upper end is bent at a right angle to the right. And the bending part 211 of the upper end part of the latching member 21 is arrange | positioned so that the upper surface of the intermediate part of the longitudinal direction of the leaf | plate spring 73 may adjoin and oppose from upper direction.
The release air cylinder 22 is driven in a direction in which the locking member 21 located at a position where the bent portion 211 is closely opposed to the upper surface of the leaf spring 73 is lowered, and the leaf spring 73 is pulled down via the locking member 21. it can.
By this pulling down, the front end portion of the leaf spring 73 is separated from the moving knife 71 and the sewing start end portion of the lower thread clamped between the moving knife 71 is released.
[針板]
図14は針板17の平面図である。針板17は、ミシンベッド部16の上面に水平に取り付けられている長方形状の平板であって、その長辺の方向が前後方向に沿うように配置されている。
針板17は、上面の中央部に送り歯14が出没する矩形の開口部171が形成され、当該開口部171に連なって第一の糸切り装置60の動メス61及び固定メス62と糸たぐり部材81が配置される切り欠き172が形成されている。これらは針板17に対して上下に貫通して形成されている。
また、開口部171の前側には、当該開口部171に連なって、後述する縫い開始端部保持機構50のスライド板51のガイド溝173が形成されている。このガイド溝173は、開口部171と左右幅が等しくなっている。
[Needle plate]
FIG. 14 is a plan view of the needle plate 17. The needle plate 17 is a rectangular flat plate that is horizontally attached to the upper surface of the sewing machine bed portion 16, and is arranged such that the direction of its long side is along the front-rear direction.
The needle plate 17 is formed with a rectangular opening 171 in which the feed dog 14 protrudes and protrudes at the center of the upper surface, and is connected to the opening 171 and the moving knife 61 and the fixed knife 62 of the first thread trimmer 60 and thread unwinding. A notch 172 in which the member 81 is disposed is formed. These are formed so as to penetrate the needle plate 17 vertically.
Further, a guide groove 173 of the slide plate 51 of the sewing start end holding mechanism 50 described later is formed on the front side of the opening 171 so as to continue to the opening 171. The guide groove 173 has the same width as the opening 171.
[縫い開始端部保持機構]
縫い開始端部保持機構50は、上糸及び下糸の縫い開始端部をそれぞれ保持するための上糸捕捉孔及び下糸捕捉孔としての第一の開口部511及び第二の開口部512が形成されたスライド板51(図15〜図20参照)と、スライド板51に前後方向の動作を付与する第一の糸保持エアシリンダー52と、スライド板51及び第一の糸保持エアシリンダー52に前後方向の動作を付与する第二の糸保持エアシリンダー53(図3参照)とを備えている。
[Sewing start end holding mechanism]
The sewing start end holding mechanism 50 includes a first opening 511 and a second opening 512 as upper thread catching holes and lower thread catching holes for holding the sewing start ends of the upper thread and the lower thread, respectively. The formed slide plate 51 (see FIGS. 15 to 20), the first thread holding air cylinder 52 for imparting the longitudinal movement to the slide plate 51, the slide plate 51 and the first thread holding air cylinder 52 And a second yarn holding air cylinder 53 (see FIG. 3) that imparts a front-back operation.
スライド板51は、真直に延びた長尺の平板であり、針板17のガイド溝173内に前後方向に沿って配置される。スライド板51の後端部には上糸の縫い開始端部を保持する第一の開口部511が貫通形成され、後端部から幾分前方となる位置に下糸の縫い開始端部を保持する第二の開口部512が貫通形成されている。
スライド板51は、前後移動により、第一又は第二の開口部511,512を針穴15の真上に位置決めし、下糸又は上糸の縫い開始端部を挿通させてから前方に移動することで、下糸D又は上糸Uの縫い開始端部をスライド板51の下面と針板17のガイド溝173の内面との間に挟み込むことにより保持を行う。
The slide plate 51 is a long flat plate extending straight, and is disposed in the guide groove 173 of the needle plate 17 along the front-rear direction. A first opening 511 is formed in the rear end of the slide plate 51 to hold the upper thread sewing start end, and the lower thread sewing start end is held at a position slightly ahead of the rear end. A second opening 512 is formed to penetrate therethrough.
The slide plate 51 is moved forward and backward by positioning the first or second openings 511 and 512 directly above the needle hole 15 by inserting the sewing start end portion of the lower thread or the upper thread. Thus, the sewing start end of the lower thread D or the upper thread U is held between the lower surface of the slide plate 51 and the inner surface of the guide groove 173 of the needle plate 17 for holding.
上記スライド板51は、まず、針穴15に対して第二の開口部512を位置決めした下糸挿通位置でエアーブロー機構40によって吹き上げられた下糸Dの縫い開始端部を挿通し(図16)、かかる状態から前方に向かって移動して針穴15に対して第一の開口部511を位置決めした上糸挿通位置となる(図19)。上糸挿通位置では、下糸Dの縫い開始端部がスライド板51と針板17の間で挟まれて保持されると共に、上糸Uの縫い開始端部が挿通可能となる。上糸Uの挿通後、スライド板51はさらに前方の退避位置まで移動して、スライド板51と針板17の間で下糸Dと上糸Uの縫い開始端部が保持された状態となる(図20)。
従って、スライド板51は、下糸挿通位置と上糸挿通位置と退避位置の三位置の間を移動位置決めする必要がある。
First, the slide plate 51 is inserted through the sewing start end of the lower thread D blown up by the air blow mechanism 40 at the lower thread insertion position where the second opening 512 is positioned with respect to the needle hole 15 (FIG. 16). ), The upper thread insertion position where the first opening 511 is positioned with respect to the needle hole 15 by moving forward from this state (FIG. 19). At the upper thread insertion position, the sewing start end of the lower thread D is sandwiched and held between the slide plate 51 and the needle plate 17, and the sewing start end of the upper thread U can be inserted. After the upper thread U is inserted, the slide plate 51 further moves to the forward retracted position, and the sewing start end of the lower thread D and the upper thread U is held between the slide plate 51 and the needle plate 17. (FIG. 20).
Accordingly, the slide plate 51 needs to be moved and positioned between three positions of the lower thread insertion position, the upper thread insertion position, and the retracted position.
上記第一の糸保持エアシリンダー52は、そのプランジャーにスライド板51が直接的に連結されており、スライド板51を上記下糸挿通位置から上糸挿通位置への間の移動を行う。
第二の糸保持エアシリンダー53は、そのプランジャーに第一の糸保持エアシリンダー52の本体が直接的に連結されており、スライド板51と第一の糸保持エアシリンダー52を上糸挿通位置から退避位置への間の移動を行う。
なお、第一の糸保持エアシリンダー52は、前後方向に移動可能なスライドガイド等によりミシンベッド部16内で支持する構成としても良い。
In the first thread holding air cylinder 52, a slide plate 51 is directly connected to a plunger thereof, and the slide plate 51 is moved from the lower thread insertion position to the upper thread insertion position.
The main body of the first thread holding air cylinder 52 is directly connected to the plunger of the second thread holding air cylinder 53, and the slide thread 51 and the first thread holding air cylinder 52 are connected to the upper thread insertion position. To the retracted position.
The first thread holding air cylinder 52 may be supported in the sewing machine bed portion 16 by a slide guide or the like that can move in the front-rear direction.
[第一の糸切り装置]
図21は第一の糸切り装置60の斜視図、図22〜図24は第一の糸切り装置60の動メス61及び固定メス62の斜視図、図25は後面図である。
第一の糸切り装置60は、左右方向に長尺であって右端部に右方に向けた刃先を備える動メス61と、左右方向に長尺であって右端部に鈎状部621を備える固定メス62と、動メス61に左右方向の往復移動を付与する第一の糸切りエアシリンダー63(図3参照)とを備えている。
[First thread trimmer]
21 is a perspective view of the first thread trimmer 60, FIGS. 22 to 24 are perspective views of the moving knife 61 and the fixed knife 62 of the first thread trimmer 60, and FIG. 25 is a rear view.
The first thread trimming device 60 is provided with a moving knife 61 that is long in the left-right direction and has a cutting edge directed rightward at the right end portion, and a hook-like portion 621 that is long in the left-right direction and right-end portion. A fixed knife 62 and a first thread trimming air cylinder 63 (see FIG. 3) that provides the moving knife 61 with reciprocal movement in the left-right direction are provided.
動メス61は、先端部の刃先が前後方向にフラットであり、固定メス62の上に重ねて配置されている。また、動メス61の基端部は第一の糸切りエアシリンダー63のプランジャーに取り付けられた支持板64にネジ止めにより固定されている。
そして、動メス61は、非切断時には、針板17の切り欠き172内において、スライド板51及び固定メス62よりも左方に位置しており、切断時には右方に移動してスライド板51の下側に進入する。
The moving knife 61 has a blade edge at the tip that is flat in the front-rear direction, and is arranged on the fixed knife 62. The base end of the moving knife 61 is fixed to the support plate 64 attached to the plunger of the first thread trimming air cylinder 63 by screws.
The moving knife 61 is positioned to the left of the slide plate 51 and the fixed knife 62 in the notch 172 of the needle plate 17 when not cut, and moves to the right when cutting to move the slide plate 51 to the right. Enter the bottom.
固定メス62は、その右端部の鈎状部621の内側に左方に向いた刃先が形成されており、鈎状部621の内側に入り込んだ下糸及び上糸を固定メス62の刃先と動メス61の刃先と挟んで切断を行う。
固定メス62は、非切断時の動メス61よりも右方に延出されており、スライド板51の下側に入り込んだ状態で配置されている。
The fixed knife 62 has a blade edge facing leftward on the inside of the hook-shaped portion 621 at the right end thereof. The lower thread and the upper thread that have entered the inside of the hook-shaped section 621 are moved with the blade edge of the fixed knife 62. Cutting is performed by sandwiching the knife 61 with the blade edge.
The fixed knife 62 extends to the right side of the moving knife 61 when not cut, and is arranged in a state of entering the lower side of the slide plate 51.
[糸たぐり機構]
糸たぐり機構80は、図22〜図25に示すように、スライド板51に保持された下糸D及び上糸Uの縫い開始端部を捕捉して下方にたぐる糸たぐり部材81と、糸たぐり部材81を所定の糸たぐり方向に沿って移動させる糸たぐりエアシリンダー82(図3参照)とを備えている。
[Threading mechanism]
As shown in FIGS. 22 to 25, the thread threading mechanism 80 includes a thread threading member 81 that catches the sewing start end portions of the lower thread D and the upper thread U held by the slide plate 51 and hangs downward, and the thread threading mechanism. A thread thread air cylinder 82 (see FIG. 3) that moves the member 81 along a predetermined thread thread direction is provided.
糸たぐり部材81は、下糸D及び上糸Uの縫い開始端部を上から押さえる保持部811と、当該保持部811の先端部(右端部)で下方に屈曲して下糸D及び上糸Uの縫い開始端部が保持部811から抜け出さないように保持する爪部812と、保持部811から糸たぐり方向(左斜め下方向)に延出された延出部813とを備え、延出部813の基端部は糸たぐりエアシリンダー82のプランジャーに連結されている。   The thread take-up member 81 includes a holding portion 811 for pressing the sewing start ends of the lower thread D and the upper thread U from above, and a downward bending at the tip end portion (right end portion) of the holding portion 811. A claw portion 812 that holds the sewing start end of U so as not to come out of the holding portion 811, and an extending portion 813 that extends from the holding portion 811 in the thread take-off direction (left obliquely downward direction). The base end portion of the portion 813 is connected to the plunger of the thread winding air cylinder 82.
糸たぐり部材81の先端部は、前述した第一の糸切り装置60の固定メス62のすぐ前側に隣接する配置となっている。さらに、糸たぐり部材81は、保持部811と爪部812と延出部813とにより略U字状に形成され、その内側をスライド板51が通過するように配置されている。従って、スライド板51が前方の退避位置まで移動して下糸D及び上糸Uの縫い開始端部を保持すると、当該下糸D及び上糸Uの縫い開始端部はU字状の内側空間を通過している状態となる。   The front end portion of the thread take-up member 81 is disposed adjacent to the front side of the fixed knife 62 of the first thread trimming device 60 described above. Further, the thread take-up member 81 is formed in a substantially U shape by the holding portion 811, the claw portion 812, and the extending portion 813, and is disposed so that the slide plate 51 passes through the inside thereof. Therefore, when the slide plate 51 moves to the front retracted position and holds the sewing start end portions of the lower thread D and the upper thread U, the sewing start end portions of the lower thread D and the upper thread U are U-shaped inner space. It will be in the state which has passed.
この時、図22に示すように、下糸D及び上糸Uの縫い開始端部は、固定メス62の鈎状部621に対して右上に位置するので、そのままの状態では切断することはできない。
しかしながら、糸たぐり部材81は、図25に示すように、糸たぐりエアシリンダー82により左斜め下側に向かって移動するので、図23に示すように、下糸D及び上糸Uの縫い開始端部を固定メス62の鈎状部621の内側に引き込み係合させることができる。
これにより、動メス61を右方に移動させることで下糸D及び上糸Uの縫い開始端部の切断が可能となる。
At this time, as shown in FIG. 22, the sewing start end portions of the lower thread D and the upper thread U are located on the upper right side with respect to the hook-shaped portion 621 of the fixed knife 62, and therefore cannot be cut as they are. .
However, as shown in FIG. 25, the thread threading member 81 is moved diagonally to the lower left by the thread winding air cylinder 82, so that the sewing start ends of the lower thread D and the upper thread U as shown in FIG. The portion can be pulled into and engaged with the inside of the hook-shaped portion 621 of the fixed knife 62.
Accordingly, the sewing start end portions of the lower thread D and the upper thread U can be cut by moving the moving knife 61 to the right.
[捕集機構]
捕集機構19は、ミシンベッド部16の内部であって第一の糸切り装置60の下方に配設されている。この捕集機構19は、上部が開口した筐体と、筐体内部に設けられたファン191(図3参照)と、筐体内に吸引された下糸及び上糸の切除片を捕集するトラップとを備え、ファン191の駆動によりトラップに切除片を捕集することを可能としている。
[Catching mechanism]
The collecting mechanism 19 is disposed inside the sewing machine bed portion 16 and below the first thread trimming device 60. The trapping mechanism 19 includes a casing that is open at the top, a fan 191 (see FIG. 3) provided inside the casing, and a trap that collects cut pieces of lower thread and upper thread sucked into the casing. The excision piece can be collected in the trap by driving the fan 191.
[ミシンの制御系]
ミシンの制御系を図3に基づいて説明する。
ミシン10の制御装置110は、制御、判断等各種処理用の各種プログラムが記憶、格納されたROM112と、これらの各種プログラムに従って各種演算処理を行うCPU111と、各種処理におけるワークメモリとして使用されるRAM113と、各種の縫製データ及び設定データを格納したEEPROM114とで概略構成されている。
そして、制御装置110には、システムバス及び駆動回路等を介して、縫製の駆動源となるミシンモーター117、保持解除機構20の解除エアシリンダー22、糸寄せ機構30の第一の糸寄せエアシリンダー32及び第二の糸寄せエアシリンダー35、エアーブロー機構40のノズル昇降エアシリンダー44及び切替弁45、開始端部保持機構50の第一の糸保持エアシリンダー52及び第二の糸保持エアシリンダー53、第一の糸切り装置60の第一の糸切りエアシリンダー63、第二の糸切り装置70の第二の糸切りソレノイド74、糸たぐり機構80の糸たぐりエアシリンダー82、捕集機構19のファン191、各種の操作を入力する操作入力部115、縫製の開始を入力するスタートペダル116等が接続されている。
[Sewing machine control system]
A control system of the sewing machine will be described with reference to FIG.
The control device 110 of the sewing machine 10 includes a ROM 112 that stores and stores various programs for various processes such as control and determination, a CPU 111 that performs various arithmetic processes according to these various programs, and a RAM 113 that is used as a work memory in the various processes. And an EEPROM 114 storing various sewing data and setting data.
The control device 110 includes a sewing machine motor 117 serving as a sewing drive source, a release air cylinder 22 of the holding release mechanism 20, and a first yarn feed air cylinder of the yarn feed mechanism 30 via a system bus and a drive circuit. 32, the second yarn holding air cylinder 35, the nozzle raising / lowering air cylinder 44 and switching valve 45 of the air blow mechanism 40, the first yarn holding air cylinder 52 and the second yarn holding air cylinder 53 of the start end holding mechanism 50. The first thread trimming air cylinder 63 of the first thread trimming device 60, the second thread trimming solenoid 74 of the second thread trimming device 70, the thread trimming air cylinder 82 of the thread trimming mechanism 80, and the collecting mechanism 19 A fan 191, an operation input unit 115 for inputting various operations, a start pedal 116 for inputting the start of sewing, and the like are connected.
なお、制御装置110は、実際には、解除エアシリンダー22、第一の糸寄せエアシリンダー32、第二の糸寄せエアシリンダー35、ノズル昇降エアシリンダー44、第一の糸保持エアシリンダー52、第二の糸保持エアシリンダー53、第一の糸切りエアシリンダー63、第二の糸切りソレノイド74及び糸たぐりエアシリンダー82を個々に作動させる電磁弁に対して制御を行うが、ここでは各電磁弁の図示は省略する。
また、ミシンモーター117やファン191はドライバー回路を介して制御されるがその図示も省略する。
Note that the control device 110 actually includes the release air cylinder 22, the first yarn gathering air cylinder 32, the second yarn gathering air cylinder 35, the nozzle lifting / lowering air cylinder 44, the first yarn holding air cylinder 52, Control is performed on the solenoid valves that individually operate the second thread holding air cylinder 53, the first thread trimming air cylinder 63, the second thread trimming solenoid 74, and the thread trimming air cylinder 82. Here, each solenoid valve is controlled. The illustration of is omitted.
Although the sewing machine motor 117 and the fan 191 are controlled via a driver circuit, their illustration is also omitted.
[縫い開始端部の切断制御]
図30は下糸D及び上糸Uの縫い開始端部の切断制御のフローチャートである。上記構成からなるミシン10の制御装置110が実行する、縫製の開始時に行われる下糸D及び上糸Uの縫い開始端部の切断制御について、主に、図15〜図20の斜視図、図26〜図29の動作説明図及び図30のフローチャートに基づいて説明する。なお、図26〜図29において符号Cは被縫製物である布地を示している。
以下に説明する縫い開始端部の切断動作では、当初はミシンモーター117は針棒が上死点に位置する状態で停止していること及び前回行われた縫製により下糸の先端部が第二の糸切り装置70にクランプされている状態であることを前提とする。また、ミシンの電源がOFFになった状態では、スライド板51は退避位置(図26(A))に位置しており、ミシンの電源がONになるとスライド板51は下糸挿通位置(図26(B))に位置移動するように制御される。以下の説明では、ミシンの電源がONになった状態で、スライド板51が下糸挿通位置に移動した状態から説明する。
[Cutting control of sewing start end]
FIG. 30 is a flowchart of cutting control of the sewing start end portions of the lower thread D and the upper thread U. With respect to the cutting control of the sewing start end portions of the lower thread D and the upper thread U, which is performed at the start of sewing, which is executed by the control device 110 of the sewing machine 10 having the above-described configuration, mainly perspective views and diagrams of FIGS. The operation will be described with reference to the operation explanatory diagrams of FIGS. 26 to 29 and the flowchart of FIG. 30. In FIGS. 26 to 29, symbol C indicates a fabric that is a sewing object.
In the cutting operation of the sewing start end described below, the sewing machine motor 117 is initially stopped with the needle bar positioned at the top dead center, and the tip of the lower thread is moved to the second position due to the last sewing. It is assumed that the thread is being clamped by the thread trimmer 70. When the sewing machine is turned off, the slide plate 51 is in the retracted position (FIG. 26A). When the sewing machine is turned on, the slide plate 51 is in the lower thread insertion position (FIG. 26). (B)) is controlled to move. In the following description, the slide plate 51 is moved to the lower thread insertion position while the sewing machine is turned on.
第一及び第二の糸保持エアシリンダー52,53を進出状態として、スライド板51は第二の開口部512が針穴15に重合する下糸挿通位置に位置している(図30のステップS1)。この時、糸たぐりエアシリンダー82は進出状態であり、糸たぐり部材81はスライド板51よりも上側へ位置している(図15)。
そして、図4に示すように、水平釜18から第二の糸切り装置70に渡る下糸の縫い開始端部に対して、糸寄せ機構30の第一及び第二の糸寄せエアシリンダー32,35を進出状態として糸寄せフック31を前方に進出させる。これにより、凹部312内に下糸の縫い開始端部を捕捉した後、第二の糸寄せエアシリンダー35のみを後退状態とする。これにより、水平釜18から下糸が繰り出されると共に下糸の縫い開始端部が針穴15の真下を通過する経路となるように引き寄せられる。
With the first and second thread holding air cylinders 52 and 53 in the advanced state, the slide plate 51 is positioned at the lower thread insertion position where the second opening 512 overlaps the needle hole 15 (step S1 in FIG. 30). ). At this time, the thread take-up air cylinder 82 is in the advanced state, and the thread take-up member 81 is positioned above the slide plate 51 (FIG. 15).
Then, as shown in FIG. 4, the first and second threading air cylinders 32 of the thread shifting mechanism 30 with respect to the sewing start end of the lower thread passing from the horizontal hook 18 to the second thread trimming device 70, The yarn gathering hook 31 is advanced forward with 35 as an advanced state. Thereby, after the sewing start end portion of the lower thread is captured in the recess 312, only the second thread-shifting air cylinder 35 is set in the retracted state. As a result, the lower thread is drawn out from the horizontal hook 18 and is pulled so that the sewing start end of the lower thread becomes a path passing just below the needle hole 15.
次いで、エアーブロー機構40のノズル昇降エアシリンダー44を進出状態としてノズル41を上昇させ、下糸及び針穴15に対してノズル41の先端部を近接させる。
さらに、保持解除機構20の解除エアシリンダー22を後退状態として係止部材21を下降させることにより、第二の糸切り装置70による下糸の縫い開始端部の保持状態を解除する。さらに、エアーブロー機構40の切替弁45を制御してエアーの供給状態に切り替えを行う。その結果、下糸Dの縫い開始端部は、エアーブローによって針穴15の下から上に向かって吹き上げられ、針穴15及び第二の開口部512に挿通された状態となる(図16,図26(B),図30のステップS5)。
Next, the nozzle 41 is raised with the nozzle raising / lowering air cylinder 44 of the air blow mechanism 40 advanced, and the tip of the nozzle 41 is brought close to the lower thread and the needle hole 15.
Furthermore, the holding state of the sewing start end portion of the lower thread by the second thread trimming device 70 is released by lowering the locking member 21 with the release air cylinder 22 of the holding release mechanism 20 in the retracted state. Further, the switching valve 45 of the air blow mechanism 40 is controlled to switch to the air supply state. As a result, the sewing start end of the lower thread D is blown upward from below the needle hole 15 by air blow, and is inserted into the needle hole 15 and the second opening 512 (FIG. 16, FIG. FIG. 26B and step S5 in FIG. 30).
次いで、第一の糸保持エアシリンダー52を後退状態としてスライド板51を第一の開口部511が針穴15に重合する上糸挿通位置に移動させる(図17,図26(C),図30のステップS7)。これにより、下糸Dの縫い開始端部はスライド板51と針板17との間に保持される。また、この時、ノズル昇降エアシリンダー44を後退状態としてノズル41を下降させる。   Next, the first thread holding air cylinder 52 is moved backward to move the slide plate 51 to the upper thread insertion position where the first opening 511 overlaps the needle hole 15 (FIGS. 17, 26C, and 30). Step S7). Thereby, the sewing start end portion of the lower thread D is held between the slide plate 51 and the needle plate 17. At this time, the nozzle 41 is lowered by setting the nozzle lifting / lowering air cylinder 44 in the retracted state.
そして、ミシンモーター117を駆動させて縫製を開始する(図18,図30のステップS9)。
これにより、縫い針11が下降して、第一針目の針落ちが行われ、上糸Uが第一の開口部511及び針穴15に侵入し、ミシンモーター117の駆動により回転を始めた水平釜18の剣先にすくわれて、上糸Uの縫い開始端部は針穴15の下側に引き込まれる(図19,図27(A))。
Then, the sewing machine motor 117 is driven to start sewing (step S9 in FIGS. 18 and 30).
As a result, the sewing needle 11 descends, the needle drop of the first stitch is performed, and the upper thread U enters the first opening 511 and the needle hole 15 and starts rotating by driving the sewing machine motor 117. It is scooped by the sword tip of the hook 18, and the sewing start end of the upper thread U is pulled into the lower side of the needle hole 15 (FIGS. 19 and 27A).
次いで、縫い針11が上昇して針穴15から抜けるタイミングで第二の糸保持エアシリンダー53を後退状態とし、スライド板51を退避位置まで移動させる(図20,図27(B),図30のステップS11)。
これにより、下糸D及び上糸Uの縫い開始端部は前方に引き出され、糸たぐり部材81の下側においてその前後に延在した状態となる。
Next, at the timing when the sewing needle 11 rises and comes out of the needle hole 15, the second thread holding air cylinder 53 is set in the retracted state, and the slide plate 51 is moved to the retracted position (FIGS. 20, 27B, 30). Step S11).
As a result, the sewing start end portions of the lower thread D and the upper thread U are pulled forward and are in a state of extending forward and backward on the lower side of the thread lifting member 81.
そして、糸たぐりエアシリンダー82を後退状態とし、糸たぐり部材81を下降させる(図27(C),図30のステップS13)。
これにより、糸たぐり部材81は、図23に示すように、下糸D及び上糸Uの縫い開始端部を捕捉し、下方にたぐり寄せて、第一の糸切り装置60の固定メス62の鈎状部621の内側に引き込んだ状態とする。
Then, the thread take-up air cylinder 82 is set in the retracted state, and the thread take-up member 81 is lowered (FIG. 27C, step S13 in FIG. 30).
As a result, as shown in FIG. 23, the thread threading member 81 captures the sewing start end portions of the lower thread D and the upper thread U, draws them downward, and moves the fixed knife 62 of the first thread trimming device 60. The state is drawn into the inside of the bowl-shaped portion 621.
そして、ミシンモーター117による運針が継続し、二針目の針落ちが行われる(図28(A))。
この時、糸たぐりエアシリンダー82は後退状態を維持し、糸たぐり部材81は下糸D及び上糸Uの縫い開始端部に対して下方への引き込み力を付与し続けている。このため、縫いが進んで布地Cが前進すると、下糸D及び上糸Uに余長が生じてその分だけ糸たぐり部材81はさらに下降し(図28(B))、下糸D及び上糸Uの縫い開始端部を固定メス62の鈎状部621の内側にさらに引き込んだ状態とする。
この間、制御装置110は、ミシンモーター117の駆動による針棒の位置を監視し続け、三針目の縫い針の引き上げタイミングを待ち続ける(図30のステップS15)。
Then, the needle movement by the sewing machine motor 117 is continued, and the second needle drop is performed (FIG. 28A).
At this time, the thread take-up air cylinder 82 maintains the retracted state, and the thread take-up member 81 continues to apply a downward pulling force to the sewing start ends of the lower thread D and the upper thread U. For this reason, when the sewing progresses and the fabric C advances, extra lengths are generated in the lower thread D and the upper thread U, and the thread picking member 81 is further lowered (FIG. 28B), and the lower thread D and the upper thread U are further lowered. The sewing U end of the thread U is further pulled inside the hook-shaped portion 621 of the fixed knife 62.
During this time, the control device 110 continues to monitor the position of the needle bar driven by the sewing machine motor 117, and waits for the timing of raising the third stitch needle (step S15 in FIG. 30).
上記三針目の縫い針の引き上げタイミングが到達すると、第一針目の針落ち位置が第一の糸切り装置60の糸切断位置の真上となる。このタイミングで第一の糸切り装置60の第一の糸切りエアシリンダー63を進出状態とすることにより、動メス61が前進して下糸D及び上糸Uの縫い開始端部の切断が行われる(図24,図28(C),図30のステップS17)。
上記のタイミングで下糸D及び上糸Uの縫い開始端部を切断すると、上糸Uの縫い開始端部を最も短くすることができる。また、第一針目では結節が形成されないので、下糸Dは布地Cの第二針目の針落ち位置から垂れ下がっているが、下糸Dの縫い開始端部も十分に短くすることができる。
なお、下糸Dの縫い開始端部をより優先的に短くしたい場合には、次の四針目の縫い針の引き上げタイミングで糸切断を実行すれば良い。
When the pull-up timing of the third stitch reaches, the needle drop position of the first stitch is directly above the thread cutting position of the first thread trimming device 60. At this timing, the first thread trimming air cylinder 63 of the first thread trimming device 60 is set to the advanced state, so that the moving knife 61 moves forward and the sewing start ends of the lower thread D and the upper thread U are cut. (FIG. 24, FIG. 28C, step S17 in FIG. 30).
When the sewing start end portions of the lower thread D and the upper thread U are cut at the above timing, the sewing start end portion of the upper thread U can be made the shortest. In addition, since no knot is formed at the first stitch, the lower thread D hangs down from the needle drop position of the second stitch of the fabric C, but the sewing start end of the lower thread D can also be made sufficiently short.
If it is desired to preferentially shorten the sewing start end of the lower thread D, the thread cutting may be executed at the timing of the next fourth sewing needle pull-up.
次いで、縫製終了後に、第一及び第二の糸保持エアシリンダー52,53を進出状態とし、スライド板51を第二の開口部512が針穴15に重合する下糸挿通位置に移動させる(図29、図30のステップS19)。これと同時に、捕集機構19のファン191を作動させる(図30のステップS21)。
これにより、スライド板51に保持されていた下糸D及び上糸Uの切除片が解放されて落下し、捕集機構19に捕集される。
これにより、下糸D及び上糸Uの縫い開始端部の切断制御が終了する。
Next, after the end of sewing, the first and second thread holding air cylinders 52 and 53 are set to the advanced state, and the slide plate 51 is moved to the lower thread insertion position where the second opening 512 overlaps the needle hole 15 (see FIG. 29, step S19 in FIG. 30). At the same time, the fan 191 of the collection mechanism 19 is operated (step S21 in FIG. 30).
As a result, the cut pieces of the lower thread D and the upper thread U held on the slide plate 51 are released and dropped, and are collected by the collecting mechanism 19.
Thereby, the cutting control of the sewing start ends of the lower thread D and the upper thread U ends.
[発明の実施形態の技術的効果]
ミシン10は、下糸Dの縫い開始端部を下側から針穴に挿通する下糸挿通機構2と、針穴15に通された下糸Dの縫い開始端部を針板17の上側で保持する縫い開始端部保持機構50と、縫い開始端部保持機構50に保持された下糸Dの縫い開始端部を切断する第一の糸切り装置60とを備えている。
このため、布地Cに残る下糸Dの縫い開始端部をより短く切断することができ、縫い品質の向上を図ることが可能となる。
[Technical effects of the embodiment of the invention]
The sewing machine 10 includes a lower thread insertion mechanism 2 that inserts a sewing start end portion of the lower thread D into the needle hole from the lower side, and a sewing start end portion of the lower thread D passed through the needle hole 15 on the upper side of the needle plate 17. A sewing start end holding mechanism 50 to be held and a first thread trimming device 60 for cutting the sewing start end of the lower thread D held by the sewing start end holding mechanism 50 are provided.
For this reason, the sewing start end of the lower thread D remaining on the fabric C can be cut shorter, and the sewing quality can be improved.
また、ミシン10は、縫い終わりの下糸Dを切断すると共に切断された下糸Dの釜側の端部を次回の縫いの縫い開始端部として保持する第二の糸切り装置70を備え、下糸挿通機構2は、第二の糸切り装置70による下糸Dの縫い開始端部の保持状態を解除する保持解除機構20と、下糸Dの縫い開始端部を針穴15の下側に寄せる糸寄せ機構30と、保持状態が解除された下糸Dの縫い開始端部をエアーにより針穴15に挿通させるエアーブロー機構40とを有している。
これにより、縫い終わりには下糸Dの釜側の端部を次回の縫い開始端部として保持しておくことができる。そして、保持解除機構20、糸寄せ機構30、エアーブロー機構40の協働により、下糸Dの縫い開始端部を自動的に針穴に挿通させることが可能となる。
さらに、これに伴い、針穴15から上方に挿通された下糸Dの縫い開始端部は、縫い開始端部保持機構50により保持され、第一の糸切り装置60により切断されるので、これら一連の動作を自動的に行うことができ、作業負担の軽減、作業効率の向上を実現することが可能となる。
The sewing machine 10 also includes a second thread trimming device 70 that cuts the lower thread D at the end of sewing and holds the hook-side end of the cut lower thread D as the sewing start end of the next sewing, The lower thread insertion mechanism 2 includes a holding release mechanism 20 that releases the holding state of the sewing start end of the lower thread D by the second thread trimming device 70, and the sewing start end of the lower thread D at the lower side of the needle hole 15. And an air blow mechanism 40 for inserting the sewing start end portion of the lower thread D released from the holding state into the needle hole 15 by air.
Thereby, at the end of sewing, the hook side end of the lower thread D can be held as the next sewing start end. The sewing start end portion of the lower thread D can be automatically inserted into the needle hole by the cooperation of the holding release mechanism 20, the thread shifting mechanism 30, and the air blow mechanism 40.
Further, along with this, the sewing start end portion of the lower thread D inserted upward from the needle hole 15 is held by the sewing start end holding mechanism 50 and cut by the first thread trimming device 60. A series of operations can be performed automatically, and it is possible to reduce the work load and improve the work efficiency.
また、ミシン10の糸寄せ機構30は、前進移動により下糸Dの縫い開始端部を針穴15の下側に寄せる糸寄せフック31を有し、当該糸寄せフック31は、先端部に形成された下糸Dの縫い開始端部を上方に移動させる第一の傾斜部311と、先端部の上部に形成された下糸Dの縫い開始端部を捕捉する凹部312と、当該凹部312の内側に形成された下糸Dの縫い開始端部を下方に移動させる第二の傾斜部313とを備え、第一の傾斜部311の上端部よりも第二の傾斜部313の上端部の方が高くなるように形成されている。
これにより、糸寄せフック31による下糸Dの縫い開始端部の捕捉可能な上下の範囲を広くとることができ、より確実に下糸Dを針穴15の下方へ導くことが可能となる。
Further, the thread gathering mechanism 30 of the sewing machine 10 has a thread gathering hook 31 that brings the sewing start end of the lower thread D to the lower side of the needle hole 15 by forward movement, and the yarn gathering hook 31 is formed at the tip part. A first inclined portion 311 for moving the sewing start end of the lower thread D upward, a recess 312 for capturing the sewing start end of the lower thread D formed at the top of the tip, and the recess 312 A second inclined portion 313 that moves the sewing start end of the lower thread D formed on the inside downward, and the upper end of the second inclined portion 313 is more than the upper end of the first inclined portion 311 Is formed to be high.
As a result, the upper and lower range in which the sewing start end of the lower thread D can be captured by the thread catching hook 31 can be widened, and the lower thread D can be more reliably guided to the lower side of the needle hole 15.
また、ミシン10のエアーブロー機構40は、針穴15に向けてエアーを吐出するノズル41、42を備え、当該ノズル41,42は、先端部に下糸Dの縫い開始端部を通すスリット411,421を有している。
従って、ノズル41,42の上昇時にスリット411、421内へ下糸Dの縫い開始端部を導き保持することができ、より確実に下糸Dの縫い開始端部を吹き上げて、針穴15へ挿通させることが可能となる。
The air blow mechanism 40 of the sewing machine 10 includes nozzles 41 and 42 that discharge air toward the needle hole 15, and the nozzles 41 and 42 are slits 411 that let a sewing start end of the lower thread D pass through the tip. , 421.
Accordingly, when the nozzles 41 and 42 are raised, the sewing start end of the lower thread D can be guided and held in the slits 411 and 421, and the sewing start end of the lower thread D is blown up more reliably to the needle hole 15. It can be inserted.
また、ミシン10の縫い開始端部保持機構50は、第一の開口部511と第二の開口部512とがスライド方向に沿って並んで形成されたスライド板51を備え、第二の開口部512と針穴15が重合した下糸挿通位置からスライドすることにより、下糸Dの縫い開始端部をスライド板51と針板17の対向面との間に挟んで保持し、第一の開口部511と針穴15が重合した上糸挿通位置からスライドすることにより、下糸D及び上糸Uの縫い開始端部をスライド板51と針板17の対向面との間に挟んで保持することを可能としている。
従って、一部材で下糸D及び上糸Uの縫い開始端部の両方を保持することを可能とし、部品点数の低減を図ると共に、これに伴い、機構の小型化、省スペース化を実現する。
The sewing start end holding mechanism 50 of the sewing machine 10 includes a slide plate 51 in which a first opening 511 and a second opening 512 are formed side by side along the sliding direction, and the second opening By sliding from the lower thread insertion position where 512 and the needle hole 15 are overlapped, the sewing start end of the lower thread D is held between the slide plate 51 and the opposing surface of the needle plate 17, and the first opening By sliding from the upper thread insertion position where the portion 511 and the needle hole 15 are overlapped, the sewing start end portions of the lower thread D and the upper thread U are sandwiched and held between the slide plate 51 and the facing surface of the needle plate 17. Making it possible.
Accordingly, it is possible to hold both the sewing start end of the lower thread D and the upper thread U with a single member, and to reduce the number of parts, thereby realizing a reduction in the size and space saving of the mechanism. .
また、ミシン10は、スライド板51が布地の送り機構である送り歯14による送り方向下流側にスライドして上糸U及び下糸Dの縫い開始端部の保持を行い、第一の糸切り装置60を針穴15に対して送り機構の送り歯14による送り方向下流側に配置している。
そして、制御装置110は、縫い開始端部保持機構50によって、第一針目の針落ち前に下糸Dの縫い開始端部の保持を行い、第一針目の針落ち後に上糸Uの縫い開始端部の保持を行い、第二針目の針落ち以降で第一の糸切り装置60による上糸及び下糸の縫い開始端部の切断を行うように制御する。
これにより、布地から垂れ下がる下糸D及び上糸Uの縫い開始端部の根本部分を布地の送り方向の下流側にある第一の糸切り装置60に近接させ、切断後に布地側に残る下糸及び上糸の縫い開始端部をより短くすることが可能となる。
Further, the sewing machine 10 holds the sewing start ends of the upper thread U and the lower thread D by sliding the slide plate 51 to the downstream side in the feed direction by the feed dog 14 which is the cloth feed mechanism. The device 60 is arranged downstream of the needle hole 15 in the feed direction by the feed dog 14 of the feed mechanism.
Then, the control device 110 holds the sewing start end of the lower thread D before the needle drop of the first stitch by the sewing start end holding mechanism 50, and starts the sewing of the upper thread U after the needle drop of the first stitch. The end is held, and control is performed so that the first thread trimming device 60 cuts the sewing start end of the upper thread and the lower thread after the needle drop of the second stitch.
As a result, the base part of the sewing start end of the lower thread D and the upper thread U hanging from the fabric is brought close to the first thread trimming device 60 on the downstream side in the fabric feeding direction, and the lower thread remaining on the fabric side after cutting. And it becomes possible to shorten the sewing thread | yarn start start part.
また、ミシン10は、第一の糸切り装置60の動メス61,固定メス62をスライド板51よりも下方に配置し、スライド板51によりスライド方向に引き出された上糸U及び下糸Dの縫い開始端部を下方にたぐる糸たぐり機構80を備えている。
このため、第一の糸切り装置60の動メス61,固定メス62が布地に接触して傷等を付けないように配置して布地の保護を図ることが可能としつつも、下糸D及び上糸Uの縫い開始端部を適切に動メス61,固定メス62に導くことができ、より確実な切断を行うことが可能となる。
Further, the sewing machine 10 has the moving knife 61 and the fixed knife 62 of the first thread trimming device 60 disposed below the slide plate 51, and the upper thread U and the lower thread D drawn out in the slide direction by the slide plate 51. A thread pulling mechanism 80 for pulling the sewing start end downward is provided.
For this reason, the moving knife 61 and the fixed knife 62 of the first thread trimming device 60 are arranged so as not to contact the fabric and damage the fabric, so that the fabric can be protected. The sewing start end portion of the upper thread U can be appropriately guided to the moving knife 61 and the fixed knife 62, so that more reliable cutting can be performed.
[糸たぐり機構の他の例]
上述した糸たぐり機構80は、一本の糸たぐり部材81により下糸D及び上糸Uの縫い開始端部を第一の糸切り装置60の固定メス62側にたぐり寄せていたが、二本の糸たぐり部材を使用しても良い。
即ち、図31に示す糸たぐり装置80Aは、保持部811Aと爪部812Aと延出部813Aとを備える第一の糸たぐり部材81Aと、保持部831Aと爪部832Aと延出部833Aとを備える第二の糸たぐり部材83Aと、第二の糸たぐり部材83Aを支持して第一の糸たぐり部材81Aの保持部811Aに対して第二の糸たぐり部材83Aの保持部831Aを上昇により押圧接触させる第一の糸たぐりエアシリンダー82Aと、第一の糸たぐり部材81Aと第二の糸たぐり部材83Aと第一の糸たぐりエアシリンダー82Aとを支持して、これらを昇降させる第二の糸たぐりエアシリンダー84Aとを備えている。
[Other examples of thread threading mechanisms]
In the above-described thread threading mechanism 80, the sewing start end portions of the lower thread D and the upper thread U are dragged toward the fixed knife 62 side of the first thread trimming device 60 by one thread threading member 81. Alternatively, a thread take-up member may be used.
That is, the yarn threading device 80A shown in FIG. 31 includes a first thread removal member 81A including a holding portion 811A, a claw portion 812A, and an extending portion 813A, a holding portion 831A, a claw portion 832A, and an extending portion 833A. The second thread take-up member 83A and the second thread take-up member 83A are supported, and the holding portion 831A of the second thread take-up member 83A is pressed upward against the holding portion 811A of the first thread take-up member 81A. The first yarn threading air cylinder 82A to be contacted, the first thread threading member 81A, the second thread threading member 83A, and the first thread threading air cylinder 82A are supported, and the second thread is moved up and down. And an air cylinder 84A.
上記構成では、第一の糸たぐりエアシリンダー82Aを進出状態とすることにより、第一の糸たぐり部材81Aの保持部811Aに対して第二の糸たぐり部材83Aの保持部831Aを上昇により圧接することができ、これらの間で下糸D及び上糸Uの縫い開始端部を挟持することができる。
そして、下糸D及び上糸Uの縫い開始端部の挟持状態で、第二の糸たぐりエアシリンダー84Aを後退状態とすることにより、下糸D及び上糸Uの縫い開始端部を第一の糸切り装置60のメス61,62側にたぐり寄せることができる。
このように、下糸D及び上糸Uの縫い開始端部を挟持しながらたぐり寄せるので、下糸及び上糸の縫い開始端部が各糸たぐり部材81A,83Aから不慮に外れることが防止され、より確実に糸たぐり動作を行うことが可能となる。
In the above configuration, the holding portion 831A of the second yarn threading member 83A is pressed against the holding portion 811A of the first yarn threading member 81A by raising the first yarn threading air cylinder 82A. The sewing start ends of the lower thread D and the upper thread U can be held between them.
Then, the sewing start ends of the lower thread D and the upper thread U are set in the retracted state by holding the second thread pulling air cylinder 84A in a state where the sewing start ends of the lower thread D and the upper thread U are clamped. The thread trimming device 60 can be moved toward the knife 61, 62 side.
As described above, the sewing start ends of the lower thread D and the upper thread U are gripped, so that the sewing start ends of the lower thread and the upper thread are prevented from being accidentally detached from the thread lifting members 81A and 83A. Thus, the thread take-up operation can be performed more reliably.
[縫い開始端部保持機構の他の例]
上述した縫い開始端部保持機構50は、直線状のスライド板51を備えているが、その形状は直線状に限定されない。例えば、図32及び図33に示すように、円弧状のスライド板51Aを備える縫い開始端部保持機構50Aを採用しても良い。
この縫い開始端部保持機構50Aは、上糸捕捉孔及び下糸捕捉孔としての第一の開口部511A及び第二の開口部512Aを円弧状のスライド板51Aの一端部と一端部の近傍とに形成し、円弧の中心を回動中心としてスライド板51Aを回動可能に支持すると共に、スライド板51Aと同軸で連動して回動を行う入力アーム54Aに対して回動動作を付与する第一の糸保持エアシリンダー52Aと、第一の糸保持エアシリンダー52Aのプランジャーの移動方向と同じ方向に沿って当該第一の糸保持エアシリンダー52Aを進退移動させる第二の糸保持エアシリンダー53Aとを備えている。
[Another example of the sewing start end holding mechanism]
The sewing start end holding mechanism 50 described above includes the linear slide plate 51, but the shape is not limited to the linear shape. For example, as shown in FIGS. 32 and 33, a sewing start end holding mechanism 50A including an arcuate slide plate 51A may be employed.
The sewing start end holding mechanism 50A includes a first opening 511A and a second opening 512A serving as an upper thread catching hole and a lower thread catching hole that are connected to one end of the arc-shaped slide plate 51A and the vicinity of the one end. The slide plate 51A is rotatably supported with the center of the arc as the center of rotation, and a rotation operation is applied to the input arm 54A that rotates in conjunction with the slide plate 51A. One yarn holding air cylinder 52A and a second yarn holding air cylinder 53A for moving the first yarn holding air cylinder 52A forward and backward along the same direction as the plunger moving direction of the first yarn holding air cylinder 52A. And.
この場合、スライド板51Aの円弧を含む円周上に針穴15が位置するようにスライド板51Aを配置し、入力アーム54Aと第一の糸保持エアシリンダー52Aのプランジャーとは、軸と長穴とにより連結して円弧により変位を許容しつつ連動する構造とする。
また、第一の糸保持エアシリンダー52Aと第二の糸保持エアシリンダー53Aの両方が進出状態の時にスライド板51Aの第二の開口部512Aが針穴15に重合し、第一の糸保持エアシリンダー52Aと第二の糸保持エアシリンダー53Aのいずれか一方が進出状態の時に第一の開口部511Aが針穴15に重合し、第一の糸保持エアシリンダー52Aと第二の糸保持エアシリンダー53Aの両方が後退状態の時にスライド板51Aの全体が針穴15から外れた位置となる退避位置となるように各構成を配置する。
In this case, the slide plate 51A is arranged so that the needle hole 15 is positioned on the circumference including the arc of the slide plate 51A, and the input arm 54A and the plunger of the first thread holding air cylinder 52A have a shaft and a length. The structure is linked with holes and interlocked while allowing displacement by arcs.
Further, when both the first yarn holding air cylinder 52A and the second yarn holding air cylinder 53A are in the advanced state, the second opening 512A of the slide plate 51A is superposed on the needle hole 15, and the first yarn holding air. When one of the cylinder 52A and the second thread holding air cylinder 53A is in the advanced state, the first opening 511A is superposed on the needle hole 15, and the first thread holding air cylinder 52A and the second thread holding air cylinder are overlapped. The components are arranged so that the entire slide plate 51A is in the retracted position where it is out of the needle hole 15 when both 53A are in the retracted state.
これにより、開始端部保持機構50Aは、開始端部保持機構50と同様に、各糸保持エアシリンダー52A、53Aを制御することにより、スライド板51Aを下糸Dの縫い開始端部の挿通位置、上糸Uの縫い開始端部の挿通位置及び退避位置にきり替えることが可能となる。
また、スライド板が直線状である場合には針穴15の前方に対してスライド板51の配置スペースを広く確保しなければならないが、スライド板51Aが円弧状とした場合には、針穴15の前方に対して配置するスペースを低減し、省スペース化を図ることが可能となる。
Thus, the start end holding mechanism 50A controls the thread holding air cylinders 52A and 53A in the same manner as the start end holding mechanism 50, so that the slide plate 51A is inserted into the sewing start end of the lower thread D. Thus, it is possible to switch to the insertion position and the retraction position at the sewing start end of the upper thread U.
Further, when the slide plate is linear, it is necessary to secure a wide space for arranging the slide plate 51 with respect to the front of the needle hole 15. However, when the slide plate 51A has an arc shape, the needle hole 15 It is possible to reduce the space to be arranged with respect to the front and to save space.
[糸たぐり部材の規制板]
上記円弧状のスライド板51Aを使用すると、図34に示すように、各開口部511A,512Aは円弧に沿って移動するので、縫い開始端部の保持の際には下糸Dや上糸Uの縫い開始端部は前後方向から左右方向(図34のようにスライド板51Aが左側に湾曲している場合には左側)に逸れて引き寄せられることになる。
また、スライド板51Aは湾曲しているので、糸たぐり部材81の保持部811の幅をスライド板51Aの幅よりも広く設計しなければ内側を通すことができない。
これらにより、下糸Dや上糸Uの縫い開始端部は糸たぐり部材81の保持部811の左右方向の端部に寄りすぎて、糸たぐり部材81が所定方向に移動しても下糸D又は上糸Uの縫い開始端部が固定メス62の鈎状部621の内側に適正に導くことができなくなる懸念がある。
[Restriction plate for thread take-up member]
When the arc-shaped slide plate 51A is used, the openings 511A and 512A move along the arc as shown in FIG. 34. Therefore, when holding the sewing start end, the lower thread D and the upper thread U The sewing start end portion is deviated from the front-rear direction to the left-right direction (left side when the slide plate 51A is curved leftward as shown in FIG. 34).
Further, since the slide plate 51A is curved, the inner side cannot be passed unless the holding portion 811 of the thread take-up member 81 is designed wider than the width of the slide plate 51A.
As a result, the sewing start end of the lower thread D and upper thread U is too close to the left and right ends of the holding portion 811 of the thread lifting member 81, and the lower thread D even if the thread lifting member 81 moves in a predetermined direction. Alternatively, there is a concern that the sewing start end portion of the upper thread U cannot be properly guided to the inside of the hook-shaped portion 621 of the fixed knife 62.
そこで、円弧状のスライド板51Aを使用する場合には、下糸及び上糸の縫い開始端部がスライド板51Aの幅よりも左右方向に移動しないように規制する規制板85A,86Aを糸たぐり部材81の前後方向の片面側に設けることが望ましい。
また、スライド板51Aの湾曲方向の内径側となる規制板85Aには、下糸D及び上糸Uの縫い開始端部が下に潜らないように傾斜851Aを設けることが望ましい。なお、外径側には下糸D及び上糸Uの縫い開始端部は寄りにくいので、外径側の規制板86Aは省略しても良い。
Therefore, when the arc-shaped slide plate 51A is used, the restriction plates 85A and 86A for restricting the sewing start ends of the lower thread and the upper thread from moving in the left-right direction with respect to the width of the slide plate 51A are thread-trimmed. It is desirable to provide the member 81 on one side in the front-rear direction.
Further, it is desirable to provide an inclination 851A on the regulating plate 85A on the inner diameter side in the bending direction of the slide plate 51A so that the sewing start end portions of the lower thread D and the upper thread U do not dive below. Since the sewing start ends of the lower thread D and the upper thread U are less likely to be shifted to the outer diameter side, the outer diameter side regulating plate 86A may be omitted.
[保持機構の他の例]
係止部材21の上端部の屈曲部211は、板バネ73の長手方向の中間部の下面に下方から近接対向するように構成してもよい。
この構成の場合、板バネ73は外力を受けないときには動メス71の下方に離れた状態となるように支持されており、解除エアシリンダー22は、屈曲部211が板バネ73の下面に近接対向する位置にある係止部材21を上昇させる方向に駆動し、係止部材21を介して板バネ73を上方に押し付ける。そして、この押し付けにより、板バネ73の先端部が動メス71を加圧し、動メス71との間で挟持していた下糸の縫い開始端部を保持する。
また、下糸の保持を解除する際には、解除エアシリンダー22を駆動し、係止部材21を引き下げて離間させることによって、係止部材21による板バネ73への加圧を解除することができる。
[Other examples of holding mechanism]
The bent portion 211 at the upper end of the locking member 21 may be configured so as to face and face the lower surface of the intermediate portion in the longitudinal direction of the leaf spring 73 from below.
In this configuration, the leaf spring 73 is supported so as to be separated from the moving knife 71 when receiving no external force, and the release air cylinder 22 has the bent portion 211 in close proximity to the lower surface of the leaf spring 73. The locking member 21 in the position to be driven is driven in the direction of raising, and the leaf spring 73 is pressed upward via the locking member 21. And by this pressing, the front-end | tip part of the leaf | plate spring 73 pressurizes the moving knife 71, and the sewing start end part of the lower thread clamped between the moving knife 71 is hold | maintained.
Further, when releasing the holding of the lower thread, the release air cylinder 22 is driven, and the locking member 21 is pulled down and separated to release the pressure applied to the leaf spring 73 by the locking member 21. it can.
[その他]
ミシン10は、総合送りミシンを例示したが、針棒が揺動を行わない他のミシン(例えば、本縫いミシン等)に、下糸及び上糸の縫い開始端部の保持及び切断を行うための各構成を適用しても良い。
また、針穴15が送り歯14に形成されている場合を例示したが、これに限らず、針板に針穴が形成されているミシンに下糸及び上糸の縫い開始端部の保持及び切断を行うための各構成を適用しても良い。
[Others]
The sewing machine 10 is an example of a general feed sewing machine. However, in order to hold and cut a sewing start end of a lower thread and an upper thread to another sewing machine (for example, a main sewing machine) in which a needle bar does not swing. These configurations may be applied.
Moreover, although the case where the needle hole 15 is formed in the feed dog 14 is illustrated, the present invention is not limited thereto, and the sewing start end of the lower thread and the upper thread are held in the sewing machine in which the needle hole is formed in the needle plate. You may apply each structure for performing a cutting | disconnection.
10 ミシン
11 縫い針
14 送り歯
15 針穴
17 針板
18 水平釜
19 捕集機構
2 下糸挿通機構
20 保持解除機構
30 糸寄せ機構
31 糸寄せフック(糸寄せ部材)
40 エアーブロー機構
41 ノズル
411 スリット部
42 ノズル
421 スリット部
50,50A 開始端部保持機構
51,51A スライド板
511 第一の開口部(上糸捕捉孔)
512 第二の開口部(下糸捕捉孔)
60 第一の糸切り装置
61 動メス
62 固定メス
621 鈎状部
70 第二の糸切り装置
71 動メス
72 固定メス
73 板バネ
80,80A 糸たぐり機構
81 糸たぐり部材
81A 第一の糸たぐり部材
83A 第二の糸たぐり部材
85A,86A 規制板
110 制御装置
117 ミシンモーター
C 布地(被縫製物)
DESCRIPTION OF SYMBOLS 10 Sewing machine 11 Sewing needle 14 Feed dog 15 Needle hole 17 Needle plate 18 Horizontal hook 19 Collection mechanism 2 Lower thread insertion mechanism 20 Holding release mechanism 30 Yarn shifting mechanism 31 Yarn shifting hook (yarn shifting member)
40 Air blow mechanism 41 Nozzle 411 Slit part 42 Nozzle 421 Slit part 50, 50A Start end holding mechanism 51, 51A Slide plate 511 First opening (upper thread catching hole)
512 Second opening (lower thread catching hole)
60 first thread trimming device 61 moving knife 62 fixed knife 621 collar 70 second thread trimming device 71 moving knife 72 fixed knife 73 leaf springs 80, 80A thread threading mechanism 81 thread threading member 81A first thread threading member 83A Second thread take-up members 85A and 86A Restriction plate 110 Controller 117 Sewing machine motor C Cloth (to be sewn)

Claims (8)

  1. 針板又は送り歯に針穴が形成されたミシンにおいて、
    下糸の縫い開始端部をエアーにより下側から針穴へ挿通させるエアーブロー機構を有する下糸挿通機構と、
    前記針穴に通された下糸の縫い開始端部を針板の上側で保持する縫い開始端部保持機構と、
    前記縫い開始端部保持機構に保持された下糸の縫い開始端部を切断する第一の糸切り装置と、
    ミシンの動作制御を行う制御装置と、を備えることを特徴とするミシン。
    In sewing machines where needle holes are formed in the needle plate or feed dog,
    A lower thread insertion mechanism having an air blow mechanism for inserting the sewing start end of the lower thread from the lower side into the needle hole by air;
    A sewing start end holding mechanism for holding the sewing start end of the lower thread passed through the needle hole on the upper side of the needle plate;
    A first thread trimming device that cuts a sewing start end of a lower thread held by the sewing start end holding mechanism;
    And a control device that controls the operation of the sewing machine.
  2. 前記エアーブロー機構は、前記針穴に向けてエアーを吐出するノズルを備え、当該ノズルは、先端部に前記下糸の縫い開始端部を通すスリット部を有することを特徴とする請求項1記載のミシン。   The said air blow mechanism is provided with the nozzle which discharges air toward the said needle hole, The said nozzle has a slit part which lets the sewing thread start end part of the said lower thread pass to a front-end | tip part. Sewing machine.
  3. 前記縫い開始端部保持機構は、
    上糸捕捉孔と下糸捕捉孔とがスライド方向に沿って並んで形成され、前記下糸の縫い開始端部及び上糸の縫い開始端部を前記針板の対向面との間に挟んで保持する事が可能なスライド板を備え、
    前記スライド板は、前記上糸捕捉孔と前記針穴が重合した上糸挿通位置と、前記下糸捕捉孔と前記針穴が重合した下糸挿通位置と、前記下糸捕捉穴と前記上糸捕捉穴の両方が針穴から離間する退避位置と、に移動可能であることを特徴とする請求項1又は2記載のミシン。
    The sewing start end holding mechanism is
    An upper thread catching hole and a lower thread catching hole are formed side by side along the slide direction, and the sewing start end of the lower thread and the sewing start end of the upper thread are sandwiched between opposing surfaces of the needle plate. It has a slide plate that can be held,
    The slide plate includes an upper thread insertion position where the upper thread catching hole and the needle hole are overlapped, a lower thread insertion position where the lower thread catching hole and the needle hole are overlapped, the lower thread catching hole and the upper thread The sewing machine according to claim 1 or 2, wherein both of the catch holes are movable to a retracted position where the catch holes are separated from the needle holes.
  4. 前記スライド板は、前記退避位置において前記上糸及び前記下糸の縫い開始端部を前記針板の対向面との間に挟んで保持を行い、
    前記制御装置は、第一針目の針落ち前に前記スライド板を下糸挿通位置に位置させ、前記エアーブロー機構により前記下糸の縫い開始端部を下側から前記針穴と前記下糸捕捉穴へ挿通させた後、前記スライド板を上糸挿通位置に位置させ、第一針目の針落ちで前記上糸の縫い開始端部を前記針穴と前記上糸捕捉穴へ挿入させた後、前記スライド板を退避位置に位置させ、第二針目の針落ち以降で前記第一の糸切り装置による前記上糸及び前記下糸の縫い開始端部の切断を行うように前記ミシンを制御することを特徴とする請求項3記載のミシン。
    The slide plate holds the upper thread and the lower thread at the retracted position by sandwiching the sewing thread start end between the needle plate and the opposing surface of the needle plate,
    The control device positions the slide plate at the lower thread insertion position before the needle drop of the first stitch, and captures the needle thread and the lower thread from the lower end of the sewing start end of the lower thread by the air blow mechanism. After being inserted into the hole, the slide plate is positioned at the upper thread insertion position, and the sewing start end of the upper thread is inserted into the needle hole and the upper thread catching hole by the needle drop of the first stitch, The slide plate is positioned at the retracted position, and the sewing machine is controlled so that the first thread trimming device cuts the sewing start end of the upper thread and the lower thread after the needle drop of the second stitch. The sewing machine according to claim 3, wherein
  5. 前記第一の糸切り装置のメスを前記スライド板よりも下方に配置し、
    前記スライド板が退避位置の時、下方に移動して前記スライド板により引き出された前記上糸及び前記下糸の縫い開始端部をたぐり、前記第一の糸切り装置に係合させる糸たぐり機構を備え、
    前記制御装置は、前記糸たぐり機構を下方に移動させた後に、前記第一の糸切り装置による前記上糸及び前記下糸の縫い開始端部の切断を行うように前記ミシンを制御することを特徴とする請求項3又は4記載のミシン。
    The knife of the first thread trimming device is disposed below the slide plate,
    When the slide plate is in the retracted position, the thread pulling mechanism that moves downward and traverses the sewing start ends of the upper thread and the lower thread pulled out by the slide plate and engages the first thread trimming device. With
    The control device controls the sewing machine so as to cut a sewing start end portion of the upper thread and the lower thread by the first thread trimming device after moving the thread winding mechanism downward. The sewing machine according to claim 3 or 4, wherein the sewing machine is characterized in that:
  6. 縫い終わりの下糸を切断すると共に切断された下糸の釜側の端部を次回の縫製の縫い開始端部として保持する第二の糸切り装置を備え、
    前記下糸挿通機構は、
    前記第二の糸切り装置による前記下糸の縫い開始端部の保持状態を解除する保持解除機構と、
    前記下糸の縫い開始端部を前記針穴の下側に寄せる糸寄せ機構と、
    を有することを特徴とする請求項3から5のいずれか一項に記載のミシン。
    A second thread trimming device for cutting the lower thread at the end of sewing and holding the hook-side end of the cut lower thread as the sewing start end of the next sewing;
    The lower thread insertion mechanism is
    A holding release mechanism for releasing the holding state of the sewing start end of the lower thread by the second thread trimming device;
    A thread shifting mechanism that brings the sewing start end of the lower thread closer to the lower side of the needle hole;
    The sewing machine according to any one of claims 3 to 5, characterized by comprising:
  7. 前記糸寄せ機構は、前進移動により前記下糸の縫い開始端部を前記針穴の下側に寄せる糸寄せ部材を有し、
    当該糸寄せ部材は、先端部に形成された前記下糸の縫い開始端部を上方に移動させる第一の傾斜部と、前記先端部の上部に形成された前記下糸の縫い開始端部を捕捉する凹部と、当該凹部の内側に形成された前記下糸の縫い開始端部を下方に移動させる第二の傾斜部とを備え、
    前記第一の傾斜部の上端部よりも前記第二の傾斜部の上端部の方が高くなるように形成されていることを特徴とする請求項6記載のミシン。
    The thread shifting mechanism has a thread shifting member that moves a sewing start end of the lower thread toward the lower side of the needle hole by forward movement,
    The thread shifting member includes a first inclined portion that moves the sewing start end portion of the lower thread formed at the front end portion upward, and a sewing start end portion of the lower thread formed at the upper portion of the front end portion. A concave portion to be captured, and a second inclined portion that moves the sewing start end portion of the lower thread formed inside the concave portion downward,
    The sewing machine according to claim 6, wherein the upper end portion of the second inclined portion is formed to be higher than the upper end portion of the first inclined portion.
  8. 前記制御装置は、
    前記エアーブロー機構により前記下糸の縫い開始端部を下側から前記針穴と前記下糸捕捉穴へ挿通させる前までに、前記糸寄せ機構を駆動して前記下糸の縫い開始端部を前記針穴の下側に寄せると共に前記保持解除機構を駆動して前記第二の糸切り装置による前記下糸の縫い開始端部の保持状態を解除するように前記ミシンを制御することを特徴とする請求項6又は7記載のミシン。
    The control device includes:
    Before the sewing start end of the lower thread is inserted from the lower side into the needle hole and the lower thread catching hole by the air blow mechanism, the thread shifting mechanism is driven to set the lower thread sewing start end. The sewing machine is controlled so as to approach the lower side of the needle hole and drive the holding release mechanism to release the holding state of the sewing start end of the lower thread by the second thread trimming device. The sewing machine according to claim 6 or 7.
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