JPH07663A - Thread breakage detecting device for industrial sewing machine - Google Patents
Thread breakage detecting device for industrial sewing machineInfo
- Publication number
- JPH07663A JPH07663A JP4319198A JP31919892A JPH07663A JP H07663 A JPH07663 A JP H07663A JP 4319198 A JP4319198 A JP 4319198A JP 31919892 A JP31919892 A JP 31919892A JP H07663 A JPH07663 A JP H07663A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle thread
- needle
- sewing machine
- thread breakage
- 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.)
- Pending
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000003111 delayed effect Effects 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 2
- 240000008042 Zea mays Species 0.000 abstract 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 abstract 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 abstract 1
- 235000005822 corn Nutrition 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野）この発明は、工業ミシンにおい
て、上糸切れ及び下糸切れの検知に関する。The present invention relates to detection of upper thread breakage and lower thread breakage in an industrial sewing machine.
（従来の技術）上糸に直接光やレーザ光を透過して糸切
れを検知するものや、ミシン針の動きに連動したレバー
の動きから上糸切れを判断するもの、また上糸道に回転
体を設けその回転の動きから糸切れを検知するものが知
られていた。(Prior art) One that detects light thread breakage by transmitting light or laser light directly to the upper thread, one that determines upper thread breakage from the movement of the lever that is linked to the movement of the sewing machine needle, and rotation to the upper thread path. It is known that a body is provided and a thread break is detected from the rotational movement of the body.
（発明が解決しようとする問題点）これら従来のもの
は、上糸切れに関しては検知出来るが下糸切れについて
は困難であった。また多針の工業ミシンにおいてはお互
いの糸の間隔が狭く構造上検知器具の取付が困難である
ばかりでなく、多数のセンサーを必要とするため高価な
ものになりがちであった。また検知の誤動作のトラブル
が多く発生していた。(Problems to be Solved by the Invention) These prior arts can detect upper thread breakage but are difficult to detect lower thread breakage. Further, in a multi-needle industrial sewing machine, not only is the distance between the threads small and it is difficult to attach a detection instrument due to its structure, but also many sensors are required, which tends to be expensive. In addition, there were many troubles due to malfunction of detection.
（問題点を解決するための手段）従来のものがもつ、以
上の問題点を解決するために、この発明に係る糸切れ検
知装置は次のような構成とした。上糸コーンから工業ミ
シンに至る上糸道の中間に、固定軸（３）を中心に回転
可能な針金等で出来た軽い揺動レバー（２）を設け、上
糸を糸道ガイド棒（４）を経て、揺動レバー（２）の先
端の輪に通した後、糸道ガイド棒（５），（６）の間を
通して工業ミシンに供給する。別途揺動レバー（２）を
Ａの位置からＢの位置に強制的に揺動させた後、自身は
すみやかに元の位置に戻る揺動駆動機構（１２）をもう
けている。(Means for Solving Problems) In order to solve the above problems of the conventional device, the yarn breakage detecting device according to the present invention has the following configuration. In the middle of the needle thread path from the needle thread cone to the industrial sewing machine, a light rocking lever (2) made of wire or the like rotatable about the fixed shaft (3) is provided, and the needle thread is guided by the thread path guide rod (4). After passing through the loop at the tip of the rocking lever (2), it is fed to the industrial sewing machine through the space between the thread guide rods (5) and (6). After separately forcibly swinging the swing lever (2) from the position A to the position B, the swing lever (2) is provided with a swing drive mechanism (12) that quickly returns to the original position.
（作用）一定周期毎に、その周期の初めに揺動駆動機構
（１２）を動作させ、揺動レバー（２）をＡの位置より
Ｂの位置まで揺動させると、上糸は強制的に弛ませら
れ、その後速やかに揺動機構を戻すと、揺動レバー
（２）はミシンの上糸の進みに応じてＢの位置よりＡの
位置へ上昇移動して、次の周期までＡの位置で待機す
る。いま、上糸切れが発生すると、周期の初めにＢの位
置に揺動された揺動レバー（２）は上昇することなくＢ
の位置に滞留したままとなる。Ｂの位置での揺動レバー
（２）の存在を検知するため上糸切れ検知用光電センサ
ー（９）を設置し、かつ検知を確実にするため揺動レバ
ー（２）に遮光板（８）を取り付けている。また、位置
Ａと位置Ｂの中間に下糸切れ検知用光電センサー（１
０）を設けている。下糸切れが発生すると、上糸は下糸
との絡みがなくなるので正常な糸と比べて進みが遅くな
る。従って下糸切れした揺動レバー（２）は正常な糸が
光電センサー（１０）の光軸を通過した後、遅れて通過
することになる。この遅れを測定して下糸切れを検知す
ることが出来る。(Operation) When the rocking drive mechanism (12) is operated at the beginning of each cycle to rock the rocking lever (2) from the position A to the position B, the needle thread is forcibly driven. When the rocking mechanism is loosened and then the rocking mechanism is quickly returned, the rocking lever (2) moves upward from the position B to the position A in accordance with the advance of the needle thread of the sewing machine, and moves to the position A until the next cycle. Wait at. Now, when needle thread breakage occurs, the rocking lever (2) rocked to the position B at the beginning of the cycle does not move up to B
Stays in the position. An upper thread breakage detection photoelectric sensor (9) is installed to detect the presence of the swing lever (2) at the position B, and a light shield plate (8) is attached to the swing lever (2) to ensure the detection. Is attached. In addition, a photoelectric sensor (1
0) is provided. When the bobbin thread breakage occurs, the upper thread does not get entangled with the bobbin thread, and thus the advance becomes slower than that of a normal thread. Therefore, the swing lever (2) with the bobbin thread breakage will pass after a normal thread passes through the optical axis of the photoelectric sensor (10) and then with a delay. This delay can be measured to detect the bobbin thread breakage.
（発明の効果）この発明に係る糸切れ検知装置によると
きは、上糸の挙動を揺動レバー（２）の動きに置き換え
て観察できるので、振動や風等に起因する誤動作を回避
でき、また上糸の進み具合いを正確に測定できるので、
上糸切れは勿論のこと、上糸の進みの遅れより下糸切れ
も検知出来る。多数の上糸を用いる多針ミシンの場合、
複数の揺動レバーを同時に揺動させることにより光電セ
ンサー２個で上糸切れ、下糸切れが検知出来るため安価
になる上、多数のセンサーを設けることによるセンサー
調整等による誤動作もなく、より検知精度が向上する。
また複数の上糸の進み具合を目で直接観察できるので縫
い調子の改善にも寄与する。(Effects of the Invention) With the yarn breakage detection device according to the present invention, the behavior of the upper thread can be replaced with the movement of the swing lever (2) for observation, so that malfunctions due to vibration, wind, etc. can be avoided, and Since the progress of the upper thread can be measured accurately,
Not only the upper thread breakage but also the lower thread breakage can be detected from the delay in the advance of the upper thread. In the case of a multi-needle sewing machine that uses a large number of needle threads,
By swinging multiple swing levers at the same time, it is possible to detect upper thread breakage and lower thread breakage with two photoelectric sensors, which makes it less expensive, and there are no malfunctions due to sensor adjustments due to the provision of multiple sensors, and more detection is possible. Accuracy is improved.
In addition, since the progress of a plurality of needle threads can be directly observed with the eyes, it contributes to the improvement of the sewing condition.
（実施例）この発明の実施例を、図面を参照しながら説
明する。第１図は、この発明の実施例を示す斜視図、第
２図は断面及び作用説明図である。両端のフレーム（１
１）に固定軸（３）を取り付け、固定軸（３）の回りを
自由に回転可能な針金等で出来た揺動レバー（２）を上
糸の数だけ取り付けている。なを揺動レバー（２）の先
端は上糸を通す輪を成形しており、また揺動レバー
（２）の中間には光電センサーの検出精度をより確実な
ものにするため遮光板（８）を設けている。揺動レバー
（２）の下死点（Ｂ位置）を決めるためストッパー棒
（７）が両端フレーム（１１）にとりつけられている。
なお上糸の通る道を規制するための糸道ガイド棒
（４），（５），（６）もフレーム（１１）に取り付け
てい下死点（Ｂ位置）での揺動レバー（２）を検出する
ための透過型光電センサー（９）（上糸切れ検出用）と
中間点（Ｃ位置）での揺動レバー（２）を検出するため
光電センサー（１０）（下糸切れ検出用）がそれぞれ取
り付けている。揺動駆動機構（１２）は揺動レバー
（２）をＡ位置よりＢ位置に揺動させるためのもので、
空気圧シリンダーないしはその他の動力源で駆動され、
駆動後は速やかに元の位置に戻るようになっている。(Embodiment) An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view and an explanatory view of action. Frames at both ends (1
The fixed shaft (3) is attached to 1), and the rocking levers (2) made of wire or the like that can freely rotate around the fixed shaft (3) are attached by the number of needle threads. The tip of the rocking lever (2) is formed with a ring through which the upper thread is passed, and a light shielding plate (8) is provided in the middle of the rocking lever (2) in order to make the detection accuracy of the photoelectric sensor more reliable. ) Is provided. Stopper bars (7) are attached to both end frames (11) to determine the bottom dead center (position B) of the swing lever (2).
In addition, thread guide guide rods (4), (5), and (6) for restricting the passage of the upper thread are also attached to the frame (11), and the swing lever (2) at the bottom dead center (B position) is used. The transmission type photoelectric sensor (9) (for detecting the upper thread breakage) for detecting and the photoelectric sensor (10) (for detecting the lower thread breakage) for detecting the swing lever (2) at the intermediate point (C position) Each is attached. The swing drive mechanism (12) is for swinging the swing lever (2) from the A position to the B position.
Driven by a pneumatic cylinder or other power source,
After driving, it quickly returns to its original position.
第１図はこの発明の上糸を４本としたときの実施例を示
す斜視図、第２図は作用説明のための断面図である。な
お、第１図には揺動駆動機構（１２）を割愛してある。 （１） 上糸 （２） 揺動レバー （３） 固定軸 （４） 糸道ガイド棒 （５） 糸道ガイド棒 （６） 糸道ガイド棒 （７） ストッパー棒 （８） 遮光板 （９） 透過型光電センサー （１０） 透過型光電センサー （１１） フレーム （１２） 揺動駆動機構FIG. 1 is a perspective view showing an embodiment in which the present invention has four upper threads, and FIG. 2 is a sectional view for explaining the operation. The swing drive mechanism (12) is omitted in FIG. (1) Needle thread (2) Swing lever (3) Fixed shaft (4) Thread guide guide rod (5) Thread guide guide rod (6) Thread guide guide rod (7) Stopper rod (8) Light shield (9) Transmission type photoelectric sensor (10) Transmission type photoelectric sensor (11) Frame (12) Swing drive mechanism
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 義則 大阪府松原市丹南２丁目249番地 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Tanaka 2-249, Tannan, Matsubara-shi, Osaka
Claims (1)
レバー（２）等の機構を介して、上糸を周期的に、その
周期の初めに一定量だけ弛ませた後、その後の上糸の進
み具合を揺動レバー（２）の動きに置き換え測定し、上
糸の進み具合が０のときを上糸切れとし、進み具合が正
常な時と比較して一定以上遅れるときを下糸切れとする
糸切れ検知装置。Through a mechanism such as a rocking lever (2) provided in the middle of the needle thread path from the needle thread cone to the sewing machine, the needle thread is slackened periodically at the beginning of the cycle, and thereafter, The advancement of the upper thread is replaced with the movement of the swing lever (2) and the measurement is made. When the advancement of the upper thread is 0, the upper thread is broken, and the time when the advancement is delayed by a certain amount or more is compared with the time when the advancement is normal. Thread breakage detection device for thread breakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4319198A JPH07663A (en) | 1992-10-15 | 1992-10-15 | Thread breakage detecting device for industrial sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4319198A JPH07663A (en) | 1992-10-15 | 1992-10-15 | Thread breakage detecting device for industrial sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07663A true JPH07663A (en) | 1995-01-06 |
Family
ID=18107513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4319198A Pending JPH07663A (en) | 1992-10-15 | 1992-10-15 | Thread breakage detecting device for industrial sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07663A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5842432A (en) * | 1996-05-14 | 1998-12-01 | Aisin Seiki Kabushiki Kaisha | Thread consumption detecting apparatus for a sewing machine |
-
1992
- 1992-10-15 JP JP4319198A patent/JPH07663A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5842432A (en) * | 1996-05-14 | 1998-12-01 | Aisin Seiki Kabushiki Kaisha | Thread consumption detecting apparatus for a sewing machine |
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