JPS60185585A - Bobbin thread amount detector of sewing machine - Google Patents
Bobbin thread amount detector of sewing machineInfo
- Publication number
- JPS60185585A JPS60185585A JP4251584A JP4251584A JPS60185585A JP S60185585 A JPS60185585 A JP S60185585A JP 4251584 A JP4251584 A JP 4251584A JP 4251584 A JP4251584 A JP 4251584A JP S60185585 A JPS60185585 A JP S60185585A
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- hook
- bobbin thread
- sewing machine
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009958 sewing Methods 0.000 title claims description 17
- 238000001514 detection method Methods 0.000 claims description 44
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、たとえば自動サイクルミシンや、自動糸切れ
ミシンなどに好適に用いられるミシνの下ふ％節１１Ｊ
、紡暦１ｍ ｌ更す入従米からの自動糸切れミシンにお
（１て、下糸を巻いたボビンはボビンケース内に収納さ
れ、このボビンケースはミシンのベット下部に配置され
たかまに装着されるためボビン内の下糸の残量を外部か
ら１ａ察することはできなり）。したがって下糸が完全
に無くなるまで、ｔなわち縫目が形成されなくなるまで
縫製が行なわれるため連続した縫目を必要とする縫製に
おし１て、下糸が完全に熊くなったとき作業を途中で中
断する必要がある。また縫製を最初からやり直す必要が
あったりしてａｙ作業の能率が着しく低下することとな
った。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a sewing machine 11J which is suitable for use in automatic cycle sewing machines, automatic thread-cutting sewing machines, etc.
(1) The bobbin on which the bobbin thread is wound is stored in the bobbin case, and this bobbin case is attached to the hook placed at the bottom of the sewing machine's bed. Therefore, it is not possible to check the remaining amount of bobbin thread in the bobbin from the outside). Therefore, sewing is performed until the bobbin thread is completely exhausted, that is, until no stitches are formed. It is necessary to interrupt the process in the middle. Furthermore, the efficiency of the ay work is seriously reduced because it is necessary to start sewing again from the beginning.
そこで成る先行技術は、光電管などを用し１て光学的に
ミシンベット下のボビンの表面を観察して、下糸の残量
を検出して０るが糸埃、潤滑、油などのために誤動作の
恐れがあり、信頼性ｔこ劣る。The prior art involves optically observing the surface of the bobbin under the sewing machine bed using a phototube or the like to detect the remaining amount of bobbin thread. There is a risk of malfunction, and reliability is poor.
本発明の目的は、上述の技術的課題を解決し、簡単な構
成でしかも正確に下糸残量を検出することができるよう
にしたミシンの下糸量検出装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a bobbin thread amount detection device for a sewing machine that has a simple configuration and can accurately detect the bobbin thread remaining amount.
第１図は本発明に従うかま１の正面図であり、第２図は
第１図の外がまを除いた分解斜視図である。サイクルミ
シンに用いられる垂直全回転かま１の外がま２は、その
かま正面から見て外かま剣先２ａが時計回り方向２ｂに
回転するとともに、自動停止装置（図示せず）によって
予め定められた固定停止位置に停止）二する。FIG. 1 is a front view of a hook 1 according to the present invention, and FIG. 2 is an exploded perspective view of FIG. 1 with the outer hook removed. The outer hook 2 of the vertical full-rotation hook 1 used in a cycle sewing machine has an outer hook tip 2a that rotates in a clockwise direction 2b when viewed from the front of the hook, and a predetermined rotation speed that is set in advance by an automatic stop device (not shown). Stop at a fixed stop position).
この外がま２には内かま３が装着され為。内がま３には
、その内がま３が回転することを阻止するための内がま
回り止め部材４（ｆ：ＩＳ３図参照）に係合する係合凸
部５が形成されており、内がま３の周方向には軌帯６が
突出して形成される。この軌帯６は外がま２の内周面に
周方向に延在して形成された軌溝（図示せず）に嵌り込
む。内がま３は内がま押さえ７によって外がま２内に収
納、保持される。内かま３内には下糸８が巻回されたボ
ビン９を収納したボビンケース１０が収納される。ボビ
ンケース１０の内筒部１０ａには、外がま２が定位値に
停止した時の内がま押さえ７の近傍に、挿通部１１が形
成される。ボビンケース１０の上部に枢支されたつまみ
１２によってボビンケース１０は、内がま３に固定され
る。This outer hook 2 is equipped with an inner hook 3. The inner hook 3 is formed with an engaging convex portion 5 that engages with an inner hook locking member 4 (f: see IS3 diagram) for preventing the inner hook 3 from rotating. A track 6 is formed to protrude in the circumferential direction of the inner pot 3. The track 6 fits into a track groove (not shown) formed on the inner peripheral surface of the outer hook 2 and extending in the circumferential direction. The inner pot 3 is housed and held within the outer pot 2 by an inner pot holder 7. A bobbin case 10 containing a bobbin 9 on which a bobbin thread 8 is wound is housed within the inner hook 3. An insertion portion 11 is formed in the inner cylindrical portion 10a of the bobbin case 10 near the inner hook holder 7 when the outer hook 2 is stopped at the normal position. The bobbin case 10 is fixed to the inner pot 3 by a knob 12 pivotally supported on the upper part of the bobbin case 10.
第３図は本発明の一実施例の斜視図であり、第４図は第
３図の切断面線ＩＶ−ＩＶから見た断面図である。下糸
量検出装置１３は、ミシンのベットの固定位置１４に固
定される電磁石装置１５と、電磁石装置１５によって外
がま２の半径方向内方に向けて変位される検出棒１６と
、検出棒１６の変位位置を検出する検出手段１７とを含
む。電磁石装置１５の電磁コイル１８は、電源１９との
開に介在されるスイッチ２０のオン／オフ動作によって
励磁または消磁され、この電源１９は前記自動停止装置
を制御する制御回路２１に接続される。この制御回路２
１によって、外がま２が回転停止位置に停止している状
態で、スイッチ２０のオン動作が許容される。FIG. 3 is a perspective view of one embodiment of the present invention, and FIG. 4 is a sectional view taken along section line IV--IV in FIG. The bobbin thread amount detection device 13 includes an electromagnet device 15 fixed to a fixed position 14 of the bed of the sewing machine, a detection rod 16 that is displaced inward in the radial direction of the outer hook 2 by the electromagnet device 15, and a detection rod. and detection means 17 for detecting 16 displacement positions. The electromagnetic coil 18 of the electromagnetic device 15 is energized or demagnetized by the on/off operation of a switch 20 connected to a power source 19, which power source 19 is connected to a control circuit 21 that controls the automatic stop device. This control circuit 2
1 allows the switch 20 to be turned on while the outer hook 2 is stopped at the rotation stop position.
電磁コイル１８内を挿通する検出棒１６は、ボビンケー
ス１０の前記挿通部１１に挿脱自在であって、外がまの
半径方向外方位置から挿通部１１を挿通してボビン９に
巻回されている下糸８の外周面に近接、離反可能に配置
される。The detection rod 16 inserted into the electromagnetic coil 18 can be inserted into and removed from the insertion portion 11 of the bobbin case 10, and is inserted through the insertion portion 11 from a position radially outward of the outer hook and wound around the bobbin 9. The lower thread 8 is disposed so as to be close to and separate from the outer peripheral surface of the bobbin thread 8.
検出棒１６の下糸８の外周面に臨む検出端部１６ａとは
反対側の他端部１６ｂには、フランジ状のばね受部２２
が形成される。ばね受部２２と電磁石装置１５との間の
検出棒１６には、コイルばね２３が外囲される。このフ
ィルばね２３によって電磁コイル１８の消磁時において
、検出棒１６は外がま２と離反する方向（第４図の左方
）に付勢される。検出棒１６は電磁コイル１８の励磁に
よ−ってその長手方向の、第４図における右方に変位し
、電磁フィル１８の消磁によってｍ４図の左方に移動す
る。この検出棒１６の長さ！は電磁コイル１８を励磁し
たときにボビン９に巻回されている下糸８の外周面に当
接し、電磁コイル１８を消磁したときにはその検出端部
１６ａが縫製時における外がま２に当らない程度の大き
さに選ばれる。A flange-shaped spring receiver 22 is provided at the other end 16b of the detection rod 16 opposite to the detection end 16a facing the outer peripheral surface of the bobbin thread 8.
is formed. A coil spring 23 is surrounded by the detection rod 16 between the spring receiver 22 and the electromagnet device 15 . When the electromagnetic coil 18 is demagnetized by the fill spring 23, the detection rod 16 is urged in a direction away from the outer hook 2 (to the left in FIG. 4). The detection rod 16 is displaced in its longitudinal direction to the right in FIG. 4 by the excitation of the electromagnetic coil 18, and to the left in FIG. M4 by demagnetization of the electromagnetic filter 18. The length of this detection rod 16! When the electromagnetic coil 18 is energized, it comes into contact with the outer peripheral surface of the bobbin thread 8 wound around the bobbin 9, and when the electromagnetic coil 18 is demagnetized, its detection end 16a does not come into contact with the outer hook 2 during sewing. selected based on the size of the item.
検出棒１６の変位位置を検出する検出手段１７は検出棒
１６に設けられるドッグ２４と、ドッグ２４に対向して
外がま２側寄りに配置されるアクチュエータ２５と、ア
クチュエータ２５に連動するマイクロスイッチ２６とを
含む。ドッグ２４は検出棒１６の検出端部１６’ ａか
ら隙間ｄをあけて検出棒１６の外周面に形成される。The detection means 17 for detecting the displacement position of the detection rod 16 includes a dog 24 provided on the detection rod 16, an actuator 25 disposed near the outer hook 2 opposite to the dog 24, and a microswitch interlocked with the actuator 25. 26. The dog 24 is formed on the outer peripheral surface of the detection rod 16 with a gap d spaced from the detection end 16'a of the detection rod 16.
このドッグ２４はボビン９に巻回された下糸８の残量Ｚ
ｃｍ（本実施例では１００ｃｍ）となったとき、この下
糸８の外周面に検出棒１６が当接したときに、アクチュ
エータ２５が作動するように構成されており、このアク
チュエータ２５に連動するマイクロスイッチ２６からの
信号はマイクロフンピユータなどによって実現される処
理回路２７に入力される。処理回路２７の動作によって
表示部２８の機能が作動される。This dog 24 indicates the remaining amount Z of the bobbin thread 8 wound around the bobbin 9.
cm (100 cm in this embodiment), the actuator 25 is configured to operate when the detection rod 16 comes into contact with the outer peripheral surface of the bobbin thread 8. The signal from the switch 26 is input to a processing circuit 27 realized by a microcomputer or the like. The function of the display section 28 is activated by the operation of the processing circuit 27.
第４１図を参照して下糸量検出装置１３の動作状態を説
明する。外がま２は自動停止装置の制御回路２１によっ
て予め定められた回転停止位置に停止される。その後ボ
ビンケース１０の挿通部１１に対向して配置された電磁
石装置１５の電磁コイル１８を、スイッチ２０のオン動
作によって励磁する。これによって検出棒１６はコイル
ばね２３のばね力に抗して１４図の右方に伸張して、前
記挿通部１１を通ってボビン９に巻回された下糸８の外
周面に到達する。このとき下糸８の残ＩＺが１００ｃｍ
以下であるとき、ドッグ２４によってアクチュエータ
２５が作動されマイクロスイッチ２Ｇからの信号が処理
回路２７に入力され、処理回路２７によって表示部を構
成するランプ２Ｂが点灯する。下糸８の残量を検出した
後は電磁コイル１８を消磁する。これによって検出棒１
６はコイルは゛ね２３のばね力によって第４図の左方に
向かって変位する。The operating state of the bobbin thread amount detection device 13 will be explained with reference to FIG. 41. The outer hook 2 is stopped at a predetermined rotation stop position by a control circuit 21 of an automatic stop device. Thereafter, the electromagnetic coil 18 of the electromagnet device 15 disposed opposite the insertion portion 11 of the bobbin case 10 is excited by turning on the switch 20 . As a result, the detection rod 16 extends to the right in FIG. 14 against the spring force of the coil spring 23, passes through the insertion portion 11, and reaches the outer peripheral surface of the bobbin thread 8 wound around the bobbin 9. At this time, the remaining IZ of bobbin thread 8 is 100 cm.
When the following conditions occur, the actuator 25 is actuated by the dog 24, a signal from the microswitch 2G is input to the processing circuit 27, and the processing circuit 27 lights up the lamp 2B forming the display section. After detecting the remaining amount of the bobbin thread 8, the electromagnetic coil 18 is demagnetized. As a result, the detection rod 1
The coil 6 is displaced toward the left in FIG. 4 by the spring force of the spring 23.
本発明渚の実験によれば、以下に示される利点を得るこ
とができた。According to the experiments of the present invention, the following advantages could be obtained.
（１）下糸残量を検出棒１６によって直接検出するので
従来の先攻や潤滑油などによる誤検出が無く、信頼性が
高まる。しかも下糸残量が少ないとき下糸８の厚みの偏
りが少ないので正確な検出が可能となる。(1) Since the remaining amount of the bobbin thread is directly detected by the detection rod 16, there is no erroneous detection caused by the prior art or lubricating oil, and reliability is increased. Furthermore, when the remaining amount of the bobbin thread is small, there is little deviation in the thickness of the bobbin thread 8, so accurate detection is possible.
（２）下糸量の補充時期を正確に把握することができる
めで、連続した縫目を必要とする縫製性能が向−１−、
、される。(2) Since it is possible to accurately determine when to replenish the amount of bobbin thread, sewing performance that requires continuous stitches is improved.
, will be done.
（３）電磁コイル１８の消磁のときには、検出棒１６は
外がま２から離れているので、停電などによって本検出
装置の機能が停止した場合であっても検出棒１６が変位
することはなく、したがって安全性が高まる。(3) When demagnetizing the electromagnetic coil 18, the detection rod 16 is separated from the outer pot 2, so even if the function of this detection device stops due to a power outage, the detection rod 16 will not be displaced. , thus increasing safety.
（４）従来のかよ、ボビンケースの機械的構成を変える
ことなく下糸残量を検出できるので、加工に要する生産
コストの低減を図ることがで外る。また検出棒１６は外
がま２の停止位置において内がま押さえ７の位置近傍に
配置されるので、外がま２にはボビンケース１（）の挿
通部１１とを結ぶ挿通孔を設ける必要はなく、構成の簡
略化を図ることができる。(4) Since the remaining amount of bobbin thread can be detected without changing the mechanical configuration of the conventional bobbin case, it is possible to reduce the production cost required for processing. In addition, since the detection rod 16 is placed near the position of the inner hook holder 7 at the stop position of the outer hook 2, it is necessary to provide an insertion hole in the outer hook 2 to connect it to the insertion portion 11 of the bobbin case 1 (). The configuration can be simplified.
（５）検出棒１６のドッグ２４の位置または検出手段１
７のアクチュエータ２５の位置を変えるだけで下糸量Ｚ
を選択的に検出することができるので極めて実用的であ
る。(5) Position of dog 24 of detection rod 16 or detection means 1
The bobbin thread amount Z can be adjusted by simply changing the position of the actuator 25 in step 7.
It is extremely practical because it can selectively detect.
前述の実施例のように電磁フィルＸ８に限定されず他の
構成を用いて検出棒１６を移動変位するようにしてもよ
い。また表示部２８をたとえばブザーなどを用いて警報
音を発生するような構成としてもよい。The detection rod 16 is not limited to the electromagnetic filter X8 as in the above-mentioned embodiments, and other structures may be used to move and displace the detection rod 16. Further, the display unit 28 may be configured to generate an alarm sound using a buzzer or the like.
本発明に従うミシンの下糸量検出装置は、前記実施例の
ように垂直全回転かまに限定されず、水平全回転がまに
関しても用いることが可能である。The bobbin thread amount detection device according to the present invention is not limited to a vertical full-rotation hook as in the above embodiment, but can also be used for a horizontal full-rotation hook.
以上のよう１こ本発明によれは、下糸量を確実にしかも
正確に検出することができるので縫製作業の能率をいち
じるしく向上させることができる。As described above, according to the present invention, since the amount of bobbin thread can be detected reliably and accurately, the efficiency of sewing work can be significantly improved.
第１図は本発明に従う垂直全回転かま１の平面図、第２
図は第１図の分解斜視図、第３図は本発明の一実施例の
斜視図、第４図は第３図の切断面線ＩＶ−ＩＶから見た
断面図である。
２・・・外かま、３・・・内がま、７・・・内がま押さ
え、８・・・下糸、９・・・ボビン、１０・・・ボビン
ケース、１１・・・挿通部、１３・・・下糸量検出装置
、２６・・・検出棒、１７・・・検出手段
代理人 弁理士 西教圭一部
第１図
第２図
２FIG. 1 is a plan view of a vertical full-rotation hook 1 according to the present invention, and FIG.
The drawings are an exploded perspective view of FIG. 1, FIG. 3 is a perspective view of an embodiment of the present invention, and FIG. 4 is a sectional view taken along section line IV-IV in FIG. 3. 2...Outer hook, 3...Inner hook, 7...Inner hook holder, 8...Bobbin thread, 9...Bobbin, 10...Bobbin case, 11...Insertion part , 13...Bobbin thread amount detection device, 26...Detection rod, 17...Detection means Agent Patent attorney Kei Nishi Part 1 Figure 1 Figure 2 Figure 2
Claims (1)
れるミシンの下糸量検出ｖｃ置において、 前記回転停止位置にある外かまの内がまを収納保持する
内がま押さえの位置の近傍でボビンケースに挿通部が形
成され、 挿通部に挿脱自在であって外がまの半径方向外方位置か
ら挿通部を挿通してボビンに巻回されている下糸の外周
面に当接する検出棒と、検出棒が前記下糸外周面に当接
している状態における検出棒の位置を検出する検出手段
とを含むことを特徴とするミシンの下糸量検出装置。[Scope of Claims] In a lower thread amount detection position (vc) of a sewing machine that is subject to a sewing machine in which the rotation stop position of the outer hook is determined, the inner hook of the outer hook at the rotation stop position is housed and held. An insertion part is formed in the bobbin case near the position of the inner hook retainer, and the bobbin can be inserted into and removed from the insertion part, and is wound around the bobbin by passing through the insertion part from a position radially outward of the outer hook. Lower thread amount detection for a sewing machine, comprising: a detection rod that contacts the outer peripheral surface of the lower thread; and a detection means that detects the position of the detection rod in a state where the detection rod is in contact with the outer peripheral surface of the lower thread. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4251584A JPS60185585A (en) | 1984-03-05 | 1984-03-05 | Bobbin thread amount detector of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4251584A JPS60185585A (en) | 1984-03-05 | 1984-03-05 | Bobbin thread amount detector of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60185585A true JPS60185585A (en) | 1985-09-21 |
| JPS6143075B2 JPS6143075B2 (en) | 1986-09-25 |
Family
ID=12638204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4251584A Granted JPS60185585A (en) | 1984-03-05 | 1984-03-05 | Bobbin thread amount detector of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60185585A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6092965B2 (en) * | 2015-08-06 | 2017-03-08 | 木下精密工業株式会社 | Lower thread detection device |
-
1984
- 1984-03-05 JP JP4251584A patent/JPS60185585A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6143075B2 (en) | 1986-09-25 |
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