JPH0214780Y2 - - Google Patents
Info
- Publication number
- JPH0214780Y2 JPH0214780Y2 JP20216186U JP20216186U JPH0214780Y2 JP H0214780 Y2 JPH0214780 Y2 JP H0214780Y2 JP 20216186 U JP20216186 U JP 20216186U JP 20216186 U JP20216186 U JP 20216186U JP H0214780 Y2 JPH0214780 Y2 JP H0214780Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- cutting
- holding member
- sewing machine
- blade
- 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
- 238000009958 sewing Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は、ミシンの上糸、下糸の切断等に用
いる糸切り装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a thread cutting device used for cutting upper thread, lower thread, etc. of a sewing machine.
［従来の技術］
周知のように、ミシンには、縫製作業終了後布
につながる上糸および下糸を切断するための糸切
り装置が設けられているが、従来の糸切り装置は
第５図ａ，ｂに示すように、摺接可能な２つの切
刃E1，E2を相対向して配設し、この切刃E1，E2
を相対的に移動させることにより、糸Ｉを剪断す
るようになつていた。[Prior Art] As is well known, sewing machines are equipped with a thread cutting device for cutting the upper thread and bobbin thread connected to the fabric after sewing work is completed.The conventional thread cutting device is shown in Fig. 5. As shown in a and b, two cutting edges E 1 and E 2 that can be slidably contacted are arranged facing each other, and these cutting edges E 1 and E 2
By relatively moving the threads I, the thread I was sheared.
［考案が解決しようとする問題点］
ところで、上記のような糸を剪断するものの場
合、良好な切れ味を得るためには、両切刃E1，
E2の間に適度な摺接圧を与える必要があるが、
この摺接圧は糸の太さ及び硬さによつて必要とす
る強さが異なるため、従来は、剪断しにくいもの
を対象として、かなり強い摺接圧を与えていた。[Problems to be solved by the invention] By the way, in the case of shearing threads as described above, in order to obtain good sharpness, two cutting edges E 1 ,
It is necessary to apply appropriate sliding contact pressure between E 2 ,
The strength required for this sliding contact pressure differs depending on the thickness and hardness of the thread, so in the past, quite strong sliding contact pressure was applied to materials that were difficult to shear.
しかしながら摺接圧を高めた場合、糸の切れ味
は向上するが、反面、切刃の摩耗が激しくなり、
寿命が著しく低下するという問題が生じた。 However, when the sliding contact pressure is increased, the cutting quality of the thread improves, but on the other hand, the wear of the cutting edge increases,
A problem arose in that the lifespan was significantly reduced.
この考案は、前記問題点に着目して成されたも
ので、糸の太さおよび硬さに拘りなく、安定した
切れ味が得られ、かつ、高寿命なミシンの糸切り
装置の提供を目的とする。 This invention was developed by focusing on the above-mentioned problems, and aims to provide a thread cutting device for sewing machines that can provide stable cutting performance regardless of the thickness and hardness of the thread, and has a long lifespan. do.
［問題点を解決するための手段］
この考案は、一端に刃部を有する切刃体と、切
断すべき糸の側方を２点にて掛止する保持部材と
を備え、この保持部材と切刃体とを相対的に移動
させることにより、２点にて掛止されている糸の
中間部に前記刃部を接触させるようにしたもので
ある。[Means for solving the problem] This invention includes a cutting blade body having a blade portion at one end, and a holding member that hooks the thread to be cut at two points on the side. By relatively moving the cutting blade body, the blade portion is brought into contact with the intermediate portion of the thread that is hooked at two points.
［作用］
この考案において、糸の切断は、切刃体の刃部
と糸との接触のみにて行われるため、糸の太さや
硬さに拘りなく安定した切れ味を得ることができ
しかも刃部の損傷は著しく低減され、大幅に寿命
が向上する。[Function] In this device, the thread is cut only by the contact between the blade of the cutting blade and the thread, so stable cutting can be achieved regardless of the thickness and hardness of the thread. damage is significantly reduced and service life is significantly increased.
［考案の実施例］
以下、この考案の一実施例を第１図ないし第４
図に基づき説明する。なお、この実施例では、ミ
シンの上糸および下糸切断用にこの考案を適用し
た場合について説明する。[Example of the invention] Hereinafter, an example of this invention is shown in Figures 1 to 4.
This will be explained based on the diagram. In this embodiment, a case will be described in which this invention is applied to cutting the upper thread and lower thread of a sewing machine.
図において、１は湾曲した保持部材で、一端が
ミシンの機枠に取付軸２を介して回動自在に支持
されており、図外の回転駆動機構により、軸２を
中心に適宜所定方向へ回動するようになつてい
る。また、１ａは前記保持部材１の一側面に形成
した溝で、この溝１ａにより上下に相対抗する板
状部１１，１２が形成される。１１ａ，１２ａは
前記板状部１１，１２に形成された上糸保持部、
１１ｂ，１２ｂは板状部１１，１２に形成された
下糸保持部である。また、３は前記溝１ａ内に挿
通可能な切刃体としてのメスで、その先端部には
刃部３ａが形成され、他端部はミシンの機枠に固
定されている。４はメス３の下面に所定の間隔を
介して配設したクランプ板で、このクランプ板４
とメス３との間に前記板状部１２が挿通可能とな
つている。 In the figure, reference numeral 1 denotes a curved holding member, one end of which is rotatably supported on the machine frame of the sewing machine via a mounting shaft 2. It is designed to rotate. Further, reference numeral 1a denotes a groove formed on one side of the holding member 1, and this groove 1a forms plate-shaped portions 11 and 12 that are vertically opposed to each other. 11a and 12a are upper thread holding parts formed in the plate-like parts 11 and 12;
11b and 12b are lower thread holding parts formed on the plate-like parts 11 and 12. Reference numeral 3 denotes a scalpel serving as a cutting blade that can be inserted into the groove 1a, and a blade portion 3a is formed at the tip thereof, and the other end is fixed to the machine frame of the sewing machine. Reference numeral 4 denotes a clamp plate disposed on the lower surface of the knife 3 at a predetermined interval.
The plate-shaped portion 12 can be inserted between the knife 3 and the knife 3.
以上の構成に基づき、次に作用を説明する。 Based on the above configuration, the operation will be explained next.
縫製動作が完了し、作業者が糸切り指令信号を
入力すると、駆動装置（図示せず）はまず保持部
材１を矢符Ａ方向へ回転させて上糸保持部１１
ａ，１２ａおよび下糸保持部１１ｂ，１２ｂを縫
目Ｈの終端部付近に位置させ、その後、元位置へ
復帰させるべく矢符Ｂ方向へ回転させる。この復
動により、縫目Ｓの終端から針Ｎおよび釜（図示
せず）につながる上糸I1および下糸I2がそれぞれ
保持部材１の上糸保持部１１ａ，１２ａと下糸保
持部１１ｂ，１２ｂに引掛けられ、保持部材１の
移動に伴い引き出される。そして、引き出される
各糸I1，I2には、それぞれ縫目Ｈの終端と各保持
部との間で適度な張力が生じ、その状態で、まず
上糸I1が溝１ａに挿通されているメス３の刃部３
ａに接触して切断され、続いて下糸I2が切断され
る。なお、下糸I2は切断直前に板状部１２とクラ
ンプ板４との間で挟持されるため、次の縫製動作
を確実に開始することができる。 When the sewing operation is completed and the operator inputs a thread trimming command signal, the drive device (not shown) first rotates the holding member 1 in the direction of arrow A to remove the upper thread holding portion 11.
a, 12a and the bobbin thread holders 11b, 12b are positioned near the terminal end of the stitch H, and then rotated in the direction of arrow B to return to their original positions. By this backward movement, the upper thread I 1 and the lower thread I 2 connected from the terminal end of the stitch S to the needle N and hook (not shown) are moved to the upper thread holding parts 11a and 12a and the lower thread holding part 11b of the holding member 1, respectively. , 12b, and is pulled out as the holding member 1 moves. Then, in each of the threads I 1 and I 2 that are pulled out, a moderate tension is generated between the end of the stitch H and each holding part, and in this state, the upper thread I 1 is first inserted into the groove 1a. Blade part 3 of knife 3
a is contacted and cut, and then the bobbin thread I 2 is cut. Note that since the bobbin thread I 2 is clamped between the plate-shaped portion 12 and the clamp plate 4 immediately before cutting, the next sewing operation can be reliably started.
このようにこの実施例では、糸I1，I2の切断を
単一の刃部３ａと糸I1，I2との切触のみによつて
行うようになつており、従来の摺接方式による切
断方法のような切刃どうしの摩耗による切れ味の
低下が全くないため、いかなる太さ、硬さの糸に
対しても安定した切れ味を得ることができる。ま
た、刃部３ａを糸I1，I2以外のものと接触させな
い構成としたことに加え、切断時に糸から受ける
負荷をも低減し得るよう２本の糸I1，I2を１本ず
つ切断する構成としたため、刃部３ａの損傷は極
めて軽減され、耐用年数が大幅に向上する。 In this way, in this embodiment, the threads I 1 and I 2 are cut only by the cutting contact between the single blade portion 3a and the threads I 1 and I 2 , which is different from the conventional sliding contact method. Since there is no deterioration in sharpness due to abrasion of the cutting blades as is the case with the cutting method, stable sharpness can be obtained for threads of any thickness and hardness. In addition, in addition to having a structure that prevents the blade portion 3a from coming into contact with anything other than the threads I 1 and I 2 , the two threads I 1 and I 2 are separated one by one in order to reduce the load received from the threads during cutting. Because of the cutting configuration, damage to the blade portion 3a is extremely reduced and the service life is greatly improved.
なお、上記実施例においては、保持部材１に溝
１ａを形成することにより、各糸I1，I2の側方を
２点にして保持するよう構成したが、同一方向に
移動する２枚の板を用いて糸の側方を２点で保持
するようにしてもよく、さらには、上糸I1および
下糸I2を同時に切断するよう構成することも可能
であり、この考案は時に上記実施例に限定される
ものではない。 In the above embodiment, the grooves 1a are formed in the holding member 1 so that the sides of each thread I 1 and I 2 are held at two points, but the two threads moving in the same direction are It is also possible to use a plate to hold the thread at two points on the side, and it is also possible to cut the upper thread I 1 and the lower thread I 2 at the same time. It is not limited to the examples.
［考案の効果］
以上説明したとおり、この考案によれば、糸の
太さや硬さに拘りなく、安定した切れ味が得られ
ると共に、刃部の損傷を著しく軽減することがで
き、耐用年数が大幅に向上するという効果があ
る。[Effects of the invention] As explained above, with this invention, stable sharpness can be obtained regardless of the thickness and hardness of the thread, and damage to the blade can be significantly reduced, significantly extending the service life. It has the effect of improving.
第１図はこの考案の一実施例を示す斜視図、第
２図は第１図に示したものの糸引掛状態を示す部
分斜視図、第３図は第１図に示したものの上糸切
断状態を示す部分斜視図、第４図は第１図に示し
たものの上糸および下糸を切断した状態を示す斜
視図、第５図ａ，ｂは従来の糸切断構造を示す側
面図で、同図ａは切断前を、同図ｂは切断後をそ
れぞれ示す。
１……保持部材、１１，１２……板状部、１１
ａ，１２ａ……上糸保持部材、１１ｂ，１２ｂ…
…下糸保持部材、３……切刃体、３ａ……刃部。
Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is a partial perspective view of the device shown in Fig. 1 in a thread hooked state, and Fig. 3 is a perspective view of the device shown in Fig. 1 in a state where the upper thread is cut. FIG. 4 is a perspective view showing the state shown in FIG. 1 with the upper thread and lower thread cut, and FIGS. 5 a and b are side views showing the conventional thread cutting structure. Figure a shows the state before cutting, and figure b shows the state after cutting. 1... Holding member, 11, 12... Plate-shaped part, 11
a, 12a... Upper thread holding member, 11b, 12b...
...Lower thread holding member, 3...cutting blade body, 3a...blade portion.
Claims (1)
断すべき糸の側方を上下に離隔した２点で掛止す
る保持部材と、一端に刃部を有し、他端をミシン
機枠に固定すると共に前記保持部材で保持された
２点の間で糸を切断する切刃体よりなるミシンの
糸切り装置。 A holding member that is movably supported on the sewing machine frame and that hooks the sides of the thread to be cut at two vertically spaced points, has a blade at one end, and has the other end fixed to the sewing machine frame. A thread cutting device for a sewing machine comprising a cutting blade body that cuts thread between two points held by the holding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20216186U JPH0214780Y2 (en) | 1986-12-27 | 1986-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20216186U JPH0214780Y2 (en) | 1986-12-27 | 1986-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63175584U JPS63175584U (en) | 1988-11-15 |
| JPH0214780Y2 true JPH0214780Y2 (en) | 1990-04-20 |
Family
ID=31166283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20216186U Expired JPH0214780Y2 (en) | 1986-12-27 | 1986-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214780Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3981972B2 (en) * | 2002-03-28 | 2007-09-26 | ブラザー工業株式会社 | sewing machine |
-
1986
- 1986-12-27 JP JP20216186U patent/JPH0214780Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63175584U (en) | 1988-11-15 |
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