JPS6025984B2 - Sewing machine needle stop position correction device - Google Patents
Sewing machine needle stop position correction deviceInfo
- Publication number
- JPS6025984B2 JPS6025984B2 JP609480A JP609480A JPS6025984B2 JP S6025984 B2 JPS6025984 B2 JP S6025984B2 JP 609480 A JP609480 A JP 609480A JP 609480 A JP609480 A JP 609480A JP S6025984 B2 JPS6025984 B2 JP S6025984B2
- Authority
- JP
- Japan
- Prior art keywords
- stop position
- sewing machine
- needle
- return
- thread trimming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
本発明はミシンの針停止位置補正装置、特に糸切り機構
を有するミシンにおける糸切り後の針停止位置補正装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a needle stop position correcting device for a sewing machine, and more particularly to a needle stop position correcting device after thread cutting in a sewing machine having a thread trimming mechanism.
所定の縫製加工後に加工布に縫付られた上糸あるいは下
糸を自動的に切断する自動糸切り機構が設けられたミシ
ンが周知である。2. Description of the Related Art Sewing machines that are equipped with an automatic thread cutting mechanism that automatically cuts an upper thread or lower thread sewn onto a workpiece cloth after a predetermined sewing process are well known.
作業者のペダル踏返し等によって自動糸切り作用が行わ
れる。しかしながら、この種の糸切り機構を有するミシ
ンにおいては、糸切り後の針停止位置がその最上位より
下降した位置となり、厚布等の縫製加工時に布材と針先
とが接触して加工布の装着ができないという問題が生じ
、縫製加工の効率を著しく低下させる原因となっている
。すなわち、自動糸切り機構は針が加工布から離れて上
昇し最上位に達した後のミシン主軸回転を利用して糸切
り作用を行うため、糸切り完了後の針位置は本来の最適
な停止位置から下降した位置となる。第1図にはミシン
主軸則ち上軸の位相角に対する針棒及び夫びんの高3そ
して糸切り作用が行われる時期を示し、針が固定される
針綾がその高さ特性100で示されるように、上軸の回
転位相とほぼ一致した位置をとり、上軸の0度の位相角
において最上位となる。一方、上糸の糸締めを行う夫び
んの高さ特性が200にて示され、その最上位201は
針棒の特性100より遅れた位置にくることが理解され
る。周知のように、糸切り作用は針榛が上昇して加工布
から針が抜け出た後に可動メスが切られる糸を選り分け
固定メスとのせん断作用によって所定の糸を選択的に切
断することにより行われる。この糸切り完了点が破線3
00にて示され、この糸切り完了点300における針榛
の位置はその最上位Hmから著しく下降した日,となり
、この結果、前述したように、次の縫製加工時に厚布の
装着が困難となるという欠点があり、作業効率の低下が
著しく大きな問題となり、自動糸切りミシンの主要な問
題点となっている。本発明は上述従来の課題に鑑みなさ
れたものであり、その目的は、糸切り完了後に針位置を
理想の所定位置まで僅かに上昇させることのできるミシ
ンの針停止位置補正装置を提供することにある。The automatic thread trimming action is performed when the operator depresses the pedal or the like. However, in sewing machines with this type of thread trimming mechanism, the needle stop position after thread trimming is lower than the highest position, and when sewing thick fabrics, etc., the fabric material and the needle tip come into contact, causing the fabric to be cut. The problem arises that the sewing machine cannot be attached, which causes a significant decrease in the efficiency of the sewing process. In other words, the automatic thread trimming mechanism uses the rotation of the main shaft of the sewing machine after the needle lifts away from the workpiece cloth and reaches the highest position to perform thread trimming, so the needle position after thread trimming is at its original optimal stop. The position is lowered from that position. Figure 1 shows the height 3 of the needle bar and the main bottle relative to the phase angle of the sewing machine's main axis, that is, the upper axis, and the timing at which the thread trimming action is performed, and the needle twill to which the needle is fixed is shown by its height characteristic 100. As such, it takes a position that almost matches the rotational phase of the upper axis, and is at the top at a phase angle of 0 degrees of the upper axis. On the other hand, it is understood that the height characteristic of the main thread which tightens the upper thread is indicated by 200, and the highest position 201 is at a position that lags behind the characteristic 100 of the needle bar. As is well known, the thread cutting action is carried out by the movable knife selecting the threads to be cut after the needle moves up and coming out of the work cloth, and selectively cutting the predetermined threads by the shearing action with the fixed knife. be exposed. This thread cutting completion point is broken line 3
00, and the position of the needle at this thread trimming completion point 300 is significantly lower than the highest point Hm, and as a result, as mentioned above, it is difficult to attach thick cloth during the next sewing process. This has the disadvantage of causing a significant decrease in work efficiency, which is a major problem with automatic thread trimming sewing machines. The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a needle stop position correction device for a sewing machine that can slightly raise the needle position to an ideal predetermined position after thread trimming is completed. be.
上記目的を達成するために、本発明は、自動糸切り機構
を有するミシンにおいて、上軸近傍に配設され糸切り完
了後に一時的に励磁される戻しソレノィドと、戻しソレ
/ィドに連結されソレノィド励磁時に回転駆動される戻
しレバーと、上軸に連結固定され前記戻しレバーと接触
可能な被動子と、を含み、糸切り完了後の戻しソレノィ
ド励磁によって戻しレバーにて被動子を所定量移動させ
上軸を小回転角以内に逆回転することにより針停止位置
を上昇補正することを特徴とする。To achieve the above object, the present invention provides a sewing machine having an automatic thread trimming mechanism, including a return solenoid that is disposed near the upper shaft and is temporarily energized after thread trimming is completed, and a return solenoid that is connected to the return solenoid. It includes a return lever that is rotationally driven when the solenoid is energized, and a driven element that is connected and fixed to the upper shaft and can come into contact with the return lever, and the driven element is moved by a predetermined amount by the return lever when the return solenoid is energized after thread cutting is completed. The needle stop position is corrected upward by rotating the upper shaft within a small rotation angle.
以下図面に基づいて本発明の好適な実施例を説明する。Preferred embodiments of the present invention will be described below based on the drawings.
第2図には本発明に係る針停止位置の好適な実施例が示
され、ミシンアーム10‘こ軸支されア−ム内を貫通す
る上軸12には周知のようにはずみ車14及び回転位相
検出器16が設けられている。上軸12には歯形ベルト
車18が止ねじ20によって強固に固定され、図示して
いない下軸のベルト車と上軸12の歯形ベルト車18と
の間に掛けられた歯形ベルト22によって下軸と上軸1
2との連結駆動が行われている。FIG. 2 shows a preferred embodiment of the needle stop position according to the present invention, in which a sewing machine arm 10' is supported and an upper shaft 12 passing through the arm is equipped with a flywheel 14 and a rotational phase as is well known. A detector 16 is provided. A toothed belt pulley 18 is firmly fixed to the upper shaft 12 by a set screw 20. and upper axis 1
2 is being connected and driven.
本発明において特徴的なことは、上軸を糸切り後の停止
位置から逆転するための戻しソレノィド24を有し、戻
しソレノィド24の励磁駆動によって上軸12の位置す
なわち針停止位置を補正することにある。A feature of the present invention is that it has a return solenoid 24 for reversing the upper shaft from the stop position after thread trimming, and that the position of the upper shaft 12, that is, the needle stop position, is corrected by the excitation drive of the return solenoid 24. It is in.
戻しソレノィド24は針停止毎に一時的に励磁駆動され
る励磁コイル26とアーマチャ28とを有し、アーマチ
ャ28の一端には支軸30に軸支された戻しレバー32
の一端が枢支されている。前述した戻しソレノィド24
による戻し力を受けるために、上軸12には彼勤子が設
けられ、実施例における被動子は歯形ベルト車18の側
面に檀立された彼勤ピン34から形成されている。The return solenoid 24 has an excitation coil 26 that is temporarily excited and driven each time the needle stops, and an armature 28, and a return lever 32 that is supported on a support shaft 30 at one end of the armature 28.
One end is pivoted. The aforementioned return solenoid 24
In order to receive the return force caused by the rotational force, the upper shaft 12 is provided with a follower, and the driven member in this embodiment is formed of a pusher pin 34 mounted on the side of the toothed belt pulley 18.
前記戻しレバー32の他端は被動ピン34の回転近傍に
配置され、第3図の戻しソレノィド24の非励磁状態で
は戻しレバー32の池端が彼勤ピン34の回転領域から
退避した領域にあり、通常の場合には戻しレバー32と
彼動ピン34とが接触することはない。本発明の実施例
は以上の構成から成り、以下にその作用を説明する。The other end of the return lever 32 is disposed near the rotation of the driven pin 34, and in the non-energized state of the return solenoid 24 in FIG. Normally, the return lever 32 and the pivoting pin 34 do not come into contact with each other. The embodiment of the present invention has the above configuration, and its operation will be explained below.
第4図には前述した実施例の要部構造が示され、通常の
縫製状態においては励磁コイル26が非励磁状態である
ために、戻しレバー32は鎖線位置にあり、前述したよ
うに、その他端は被動ピン34の回転領域から退避した
状態にある。FIG. 4 shows the main structure of the above-mentioned embodiment. In the normal sewing state, the excitation coil 26 is in a non-excited state, so the return lever 32 is in the chain line position, and as mentioned above, the The end is in a state of being retracted from the rotation area of the driven pin 34.
従って、上鞠12及び歯形ベルト車18は本発明に係る
補正装置に拘らず矢印A方向に回転することが可能であ
る。自動糸切り作用が行われ、第1図の300で示され
る位贋にて糸切りが完了すると、上軸12も停止し、そ
の時の被動ピン34は第4図の実線位置となる。Therefore, the upper ball 12 and the toothed belt pulley 18 can rotate in the direction of arrow A regardless of the correction device according to the present invention. When the automatic thread trimming operation is performed and the thread trimming is completed at the position indicated by 300 in FIG. 1, the upper shaft 12 also stops, and the driven pin 34 at that time is in the position shown by the solid line in FIG. 4.
この糸切り完了後に、戻しソレノィド2、4の励磁コイ
ル26には針停止位置を補正するため励磁電流が供給さ
れ、この結果、アーマチャ28はコイル26によって吸
引移動され、この結果、アーマチャ28に枢支された戻
しレバー32も矢印B方向に回転する。実線で示される
戻しレバー32はその他端が被動ピン34と当接した状
態を示し、戻しソレノィド24はこの状態から更にアー
マチャ28を吸引するので、被動ピン34は戻しレバー
32によって破線位置まで通常の回転方向Aとは反対方
向に回転移動されることとなる。この結果、第1図から
明らかなように、糸切り完了点300から第4図の矢印
C方向への被動ピン34の移動角通常の場合20度程度
の移動によって針榛はその最上位Hmに向って逆方向に
戻し上昇し、補正された針停止位置300が得られるこ
ととなる。従って、第1図から明らかなように針高さが
従来の日,からhだけ上昇方向に補正されることとなり
、自動糸切りが行われた後においても、最終的な針停止
位置は本発明の補正によって厚布でも充分に装着可能な
位置となり、従来装置における作業者の手作業による補
正を必要とすることなく、縫製加工の効率を著しく向上
させることが可能となる。なお、実施例においては、彼
勤ピン34が歯形ベルト車18の側面に楢立されている
が、上軸12に歯形ベルト車18とは別個のフランジを
設け、フランジに被動ピン34を固定することも可能で
ある。After this thread trimming is completed, an exciting current is supplied to the exciting coils 26 of the return solenoids 2 and 4 in order to correct the needle stop position, and as a result, the armature 28 is attracted and moved by the coil 26, and as a result, the armature 28 is The supported return lever 32 also rotates in the direction of arrow B. The return lever 32 shown by the solid line shows a state in which the other end is in contact with the driven pin 34, and the return solenoid 24 further attracts the armature 28 from this state, so the driven pin 34 is returned to the normal position by the return lever 32 to the broken line position. It will be rotated in a direction opposite to the rotation direction A. As a result, as is clear from FIG. 1, the movement angle of the driven pin 34 from the thread trimming completion point 300 in the direction of arrow C in FIG. Then, the needle returns to the opposite direction and rises, and the corrected needle stop position 300 is obtained. Therefore, as is clear from FIG. 1, the needle height is corrected in the upward direction by h from the conventional height, and even after automatic thread trimming, the final needle stop position is changed according to the present invention. By this correction, even thick fabrics can be sufficiently attached to the position, and the efficiency of the sewing process can be significantly improved without requiring manual correction by the operator in the conventional device. In the embodiment, the driven pin 34 is raised on the side of the toothed belt pulley 18, but a flange separate from the toothed belt pulley 18 is provided on the upper shaft 12, and the driven pin 34 is fixed to the flange. It is also possible.
以上のように、本発明によれば、自動糸切り機構付ミシ
ンの針停止位置を上昇補正することができ、特に工業用
ミシンに極めて有用な補正装置を得ることが可能となる
。As described above, according to the present invention, it is possible to upwardly correct the needle stop position of a sewing machine with an automatic thread trimming mechanism, and it is possible to obtain a correction device that is particularly useful for industrial sewing machines.
第1図はミシン主軸回転位相に対する針榛及び夫ぴんの
高さ特性及び糸切り時における各部の状態を示す特性図
、第2図は本発明に係る針停止位置補正装置の好適な実
施例を示す要部断面図、第3図は第2図のm−mに沿っ
た要部断面図、第4図は第2,3図の実施例における作
用を説明する要部説明図である。
各図中同一部村には同一符号を付し、12は上軸、18
は歯形ベルト車、24は戻しソレノィド、32は戻しレ
バー、34は被動ピンである。第2図
第3図
図
漆
第4図Fig. 1 is a characteristic diagram showing the height characteristics of the needle comb and shaft pin with respect to the rotational phase of the main shaft of the sewing machine and the state of each part during thread trimming, and Fig. 2 shows a preferred embodiment of the needle stop position correction device according to the present invention. FIG. 3 is a cross-sectional view of the main part taken along the line m--m in FIG. 2, and FIG. 4 is an explanatory view of the main part for explaining the operation of the embodiment shown in FIGS. 2 and 3. The same part of the village in each figure is given the same code, 12 is on the upper axis, 18
24 is a return solenoid, 32 is a return lever, and 34 is a driven pin. Figure 2 Figure 3 Lacquer Figure 4
Claims (1)
上軸近傍に配設され糸切り完了後に一時的に励磁される
戻しソレノイドと、戻しソレノイドに連結されソレノイ
ド励磁時に回転駆動される戻しレバーと、上軸に連結固
定され前記戻しレバーと接触可能な被動子と、を含み、
糸切り完了後の戻しソレノイド励磁によつて戻しレバー
にて被動子を所定量移動させ上軸を小回転角以内に逆回
転することにより針停止位置を上昇補正することを特徴
とするミシンの針停止位置補正装置。 (2) 特許請求の範囲1記載の装置において、被動子
は上軸に固定されたベルト車の側面に植立された被動ピ
ンから形成されていることを特徴とするミシンの針停止
位置補正装置。[Claims] 1 (1) In a sewing machine having an automatic thread trimming mechanism,
a return solenoid disposed near the upper shaft and temporarily energized after thread trimming is completed; a return lever connected to the return solenoid and rotated when the solenoid is energized; and a return lever connected and fixed to the upper shaft and capable of contacting the return lever. a driven child;
A needle of a sewing machine characterized in that a driven element is moved by a predetermined amount by a return lever by energizing a return solenoid after thread trimming is completed, and the upper shaft is reversely rotated within a small rotation angle, thereby upwardly correcting the needle stop position. Stop position correction device. (2) A needle stop position correction device for a sewing machine, wherein the driven element is formed of a driven pin installed on the side of a belt pulley fixed to the upper shaft. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP609480A JPS6025984B2 (en) | 1980-01-21 | 1980-01-21 | Sewing machine needle stop position correction device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP609480A JPS6025984B2 (en) | 1980-01-21 | 1980-01-21 | Sewing machine needle stop position correction device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56102283A JPS56102283A (en) | 1981-08-15 |
JPS6025984B2 true JPS6025984B2 (en) | 1985-06-21 |
Family
ID=11628920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP609480A Expired JPS6025984B2 (en) | 1980-01-21 | 1980-01-21 | Sewing machine needle stop position correction device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6025984B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS605191A (en) * | 1983-06-24 | 1985-01-11 | 松下電器産業株式会社 | Apparatus for stopping sewing machine needle at constant position |
JPS6182793A (en) * | 1984-09-29 | 1986-04-26 | ジューキ株式会社 | Needle position correction apparatus of sewing machine |
JPS61137390U (en) * | 1985-02-18 | 1986-08-26 |
-
1980
- 1980-01-21 JP JP609480A patent/JPS6025984B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS56102283A (en) | 1981-08-15 |
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