JPH02132Y2 - - Google Patents
Info
- Publication number
- JPH02132Y2 JPH02132Y2 JP558986U JP558986U JPH02132Y2 JP H02132 Y2 JPH02132 Y2 JP H02132Y2 JP 558986 U JP558986 U JP 558986U JP 558986 U JP558986 U JP 558986U JP H02132 Y2 JPH02132 Y2 JP H02132Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- sewing machine
- blade
- feed dog
- threads
- 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
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000009966 trimming Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
〔考案の目的〕
(産業上の利用分野)
本考案は糸切りミシンの送り歯に関し、特に針
送り式ミシンの送り歯に利用されて有益である。[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a feed dog for a thread trimming sewing machine, and is particularly useful for use in a feed dog for a needle-feed type sewing machine.
(従来の技術)
従来、糸切りミシンにおけるこの種の装置とし
ては、例えば特公昭56−43758号とか実開昭60−
14581号明細書に記載された技術が知られる。(Prior art) Conventionally, as this type of device for a thread trimming sewing machine, for example, there is
The technique described in the specification of No. 14581 is known.
この種糸切り装置における技術では、一般的に
第2図に示す如く、縫製終了時糸切り信号のON
により、移動刃1が時計方向に回動して上糸2、
下糸3を捕捉する。そして移動刃1は更に回動
し、糸切断後に必要とされる上下各糸の残り長さ
を確保するため、該移動刃のU字形溝部1aで両
糸を繰り出しながら、第3〜4図示の如くその刃
部1bが固定刃6の刃部6aとかみ合う。そこで
上下糸が切断され、移動刃4は元の待機位置へ復
帰せしめられるように構成されていた。 In the technology of this kind of thread trimming device, generally, as shown in Fig. 2, the thread trimming signal is turned on at the end of sewing.
As a result, the movable blade 1 rotates clockwise to thread the upper thread 2,
Capture the bobbin thread 3. Then, the movable blade 1 rotates further, and in order to secure the remaining length of each of the upper and lower yarns required after cutting the yarn, the movable blade 1 pays out both yarns in the U-shaped groove 1a of the movable blade, and as shown in FIGS. As shown, the blade portion 1b meshes with the blade portion 6a of the fixed blade 6. There, the upper and lower threads are cut, and the movable blade 4 is configured to return to its original standby position.
(考案が解決しようとする問題点)
しかし、第3図示のタイミング附近における上
下両糸は、送り歯11を介し固定刃6の刃部6a
に接触した状態で引張られる。(Problem to be solved by the invention) However, both the upper and lower threads near the timing shown in FIG.
It is pulled while in contact with the
特に従来装置での上下糸と刃部6aとは、鋭く
当るような形態になつていたため、低強度の糸等
では刃部6aでしごかれたまま、引きちぎられる
不都合がみられた。従つて、上下糸の残り長さが
短くなり、次段の縫い始めに支障をきたす欠点が
あつた。従来この欠点をカバーするため施した手
段においては、部品点数が増えたり、装置の構成
で複雑化するというような難点を伴つた。本考案
では、ごく簡単な改善により上記不都合の解消を
計つたものである。 In particular, in the conventional device, the upper and lower threads and the blade portion 6a are in such a form that they come into sharp contact with each other, resulting in the inconvenience that low-strength threads may be torn off while being squeezed by the blade portion 6a. Therefore, the remaining length of the upper and lower threads is shortened, resulting in a disadvantage that it becomes difficult to start sewing the next stage. Conventional measures taken to overcome this drawback have been accompanied by drawbacks such as an increase in the number of parts and a complicated device configuration. The present invention aims to eliminate the above-mentioned disadvantages through very simple improvements.
(問題点を解決するための手段)
上記課題を本考案では次のような手段で解決し
た。即ち、送り歯の裏側における針孔周辺部に突
起部を設け、糸切り作動途中における上下両糸の
引張られ角を、固定刃に対し鈍角方向側へ傾斜せ
しめるようにした。
(Means for solving the problem) The above problem was solved in the present invention by the following means. That is, a protrusion is provided around the needle hole on the back side of the feed dog, so that the angle at which both the upper and lower threads are pulled during the thread cutting operation is inclined toward an obtuse angle with respect to the fixed blade.
(作用)
第1図を参照し述べると、移動刃(図示せず)
のU字状溝で繰り出される上下両糸2及び3は、
送り歯12の裏側で針孔の外周辺に設けた突起部
12aにより押し戻し抵抗を受ける。そして固定
刃6の刃部6aに対し、鈍角方向側へ傾斜せしめ
られる。(この被傾斜作用は第5図と比較対照し
てみて容易に了解し得るであろう。)
(実施例)
以下、本考案の実施例について添付図面を参照
し、説明する。(Function) Referring to Fig. 1, the movable blade (not shown)
Both the upper and lower yarns 2 and 3 are let out in the U-shaped groove of
Push-back resistance is received by a protrusion 12a provided around the outer periphery of the needle hole on the back side of the feed dog 12. The blade portion 6a of the fixed blade 6 is inclined toward the obtuse angle direction. (This tilting effect can be easily understood by comparing and contrasting it with FIG. 5.) (Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
糸切信号ONにより、ミシン主軸と連動して移
動刃1が、第2図示の如く時計方向に回動して上
糸2、下糸3を捕捉する。そして、更に回動を続
け、糸切り完了後に必要な針4、ボビン9からの
引出し量を確保するために、該移動刃1のU字状
溝部1a(第2図)で両糸を繰り出す。しかる後、
第4図に示す如く移動刃1の刃部1bが、固定刃
6の刃部6aとかみ合い、針糸2及びカマ糸3が
切断される。その後移動は1はスプリング(図示
せず)によつて復動され、待機位置に戻る。 When the thread trimming signal is turned on, the movable blade 1 rotates clockwise in conjunction with the main shaft of the sewing machine, as shown in the second diagram, to capture the upper thread 2 and the lower thread 3. Then, the rotation is continued, and both threads are let out in the U-shaped groove 1a (FIG. 2) of the movable blade 1 in order to secure the required amount of withdrawal from the needle 4 and bobbin 9 after thread cutting is completed. After that,
As shown in FIG. 4, the blade portion 1b of the movable blade 1 engages with the blade portion 6a of the fixed blade 6, and the needle thread 2 and hook thread 3 are cut. Thereafter, the movement is reversed by a spring (not shown) and returned to the standby position.
しかしながら、前述の第3図に示すように、上
下糸は送り歯11を介し、固定刃6の刃部6aに
接触した状態で引張られるため、第5図示のよう
な状態になる。従つて上糸2、下糸3は、固定刃
6の刃部6aでしごかれ、特に抵強度の糸を使用
した時には、刃部6aでかききつてしまうことが
ある。 However, as shown in FIG. 3 described above, the upper and lower threads are pulled through the feed dog 11 while being in contact with the blade portion 6a of the fixed blade 6, so that the state shown in FIG. 5 occurs. Therefore, the upper thread 2 and the lower thread 3 are squeezed by the blade part 6a of the fixed blade 6, and especially when using threads with high resistance, the threads may be strained by the blade part 6a.
本考案は第1図に示すように、送り歯12の裏
側の針穴外周部に突起部12aを設けることで、
上糸2、下糸3が、糸切作動途中で刃先6aに接
触しないか、又は接触しても鈍角にあたることに
なる。よつて両糸が、糸切り作動途中の切断、引
きちぎり等により、糸切り完了後に必要な上、下
糸量を確保出来ないという不都合が解消される。 As shown in FIG. 1, the present invention provides a protrusion 12a on the outer periphery of the needle hole on the back side of the feed dog 12.
The upper thread 2 and the lower thread 3 either do not come into contact with the cutting edge 6a during the thread cutting operation, or even if they do come into contact with it, it hits at an obtuse angle. This eliminates the inconvenience of not being able to secure the required bobbin thread amount after the thread trimming is completed due to the threads being cut or torn off during the thread trimming operation.
従来みられた欠点を補うため、固定刃の位置を
ずらすという考え方もあるが、構成他部材との配
設関係や寸法精度の確保調整という、面倒な別の
問題点が発生する。
One idea is to shift the position of the fixed blade in order to compensate for the drawbacks seen in the past, but this poses another troublesome problem of adjusting the arrangement with other components and ensuring dimensional accuracy.
本考案では、単に送り歯裏面の針孔周辺に、突
起部を設けるという簡単な手段のみで、部品を増
すこともなく、容易に所期目的を達することがで
きる。 In the present invention, the desired purpose can be easily achieved by simply providing a protrusion around the needle hole on the back side of the feed dog without adding any additional parts.
第1図は本考案送り歯の要部とその作用の説明
断面拡大図、第2〜4図はミシン糸切り装置の一
般構成とその作用説明図、第5図は従来装置にお
ける送り歯の構成作用説明断面拡大図である。
1……移動刃、2……上糸、3……下糸、6…
…固定刃、11…送り歯(従来)、12……送り
歯(本願)、12a……突起部。
Figure 1 is an enlarged cross-sectional view of the main parts of the feed dog of the present invention and their functions, Figures 2 to 4 are diagrams of the general configuration of the sewing machine thread cutting device and its functions, and Figure 5 is the configuration of the feed dog in the conventional device. It is an enlarged cross-sectional view for explaining the action. 1...Moving blade, 2...Upper thread, 3...Lower thread, 6...
...Fixed blade, 11...Feed dog (conventional), 12...Feed dog (this application), 12a...Protrusion.
Claims (1)
主軸から連動されカマの回転中心とほぼ同心的に
回動し、前記固定刃とかみ合つて上下の縫糸を切
断する移動刃とを備えた針送りミシンの糸切り装
置において、送り歯の裏側針孔周辺部に沿つて突
起部が形成されてなる糸切りミシンの送り歯。 A needle-feed sewing machine equipped with a fixed blade fixed to the sewing machine bed, and a movable blade that is interlocked with the main shaft of the sewing machine, rotates almost concentrically with the rotation center of the hook, and meshes with the fixed blade to cut the upper and lower sewing threads. In the thread cutting device, the feed dog of the thread cutting sewing machine has a protrusion formed along the periphery of the needle hole on the back side of the feed dog.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP558986U JPH02132Y2 (en) | 1986-01-17 | 1986-01-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP558986U JPH02132Y2 (en) | 1986-01-17 | 1986-01-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62117974U JPS62117974U (en) | 1987-07-27 |
JPH02132Y2 true JPH02132Y2 (en) | 1990-01-05 |
Family
ID=30787314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP558986U Expired JPH02132Y2 (en) | 1986-01-17 | 1986-01-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02132Y2 (en) |
-
1986
- 1986-01-17 JP JP558986U patent/JPH02132Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS62117974U (en) | 1987-07-27 |
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