JPS5927906Y2 - Needle tracking needle hole mechanism in zigzag sewing machine - Google Patents

Description

【考案の詳細な説明】 本考案は糸輪捕捉部が水平面を運動する水平カマ型式の
ジグザグミシンにおいて、該水平カマの回転中心線を軸
とし落下する針に適合する針穴を設けた針穴部材が、振
巾運動して針穴が降下する針に追従し該針を常に正しく
針穴に挿通させる如くした針穴機構に係り、その目的と
するところは従来のジグザグミシンにおいて針の振巾方
向に長く形成された針穴では針に押されて布が針板下に
陥没してたるみを生じ該たるみが次に針と共に針板上に
引き上げられ針の上下運動毎にいわゆる布のバタツキ現
象を起しこの為目とび等縫い不良を生じていたが、本考
案はこれら欠点を排除し常に良好なる縫いを構成できる
ジグザグミシンを提供することにある。[Detailed description of the invention] The present invention is a horizontal hook type zigzag sewing machine in which the thread ring catcher moves on a horizontal plane, and the needle hole is provided with a needle hole that fits the falling needle about the rotation center line of the horizontal hook. It relates to a needle hole mechanism in which a member moves in an oscillating width so that the needle hole follows the descending needle, and the needle is always correctly inserted into the needle hole. In the needle hole formed long in the direction, the cloth is pushed by the needle and sinks under the throat plate, causing slack.The slack is then pulled up onto the throat plate together with the needle, resulting in the so-called cloth flapping phenomenon every time the needle moves up and down. However, the object of the present invention is to provide a zigzag sewing machine that eliminates these drawbacks and can always produce good stitches.

上記目的の下に本考案はミシン針の貫通に適合する小さ
な針穴を針穴部に形成した針穴部材を設け、該部材を水
平カマの回転軸線と同軸心に枢着させ、該部材の前記針
穴部をミシン機構上の針板に設けた長溝に嵌合させ該長
溝に嵌合した針穴部の針穴を、前記水平カマの糸輪捕捉
端の運動軸軌跡内側に沿い振巾運動するところの針に同
期追従させて該針の直下に揺動させ、該針の降下点に小
さな針穴が常に位置される如くして前記欠点を除去する
様にしたものである。With the above object in mind, the present invention provides a needle hole member with a small needle hole formed in the needle hole to fit the penetration of a sewing machine needle, and pivots the member coaxially with the axis of rotation of a horizontal hook. The needle hole is fitted into a long groove provided in the needle plate on the sewing machine mechanism, and the needle hole of the needle hole fitted in the long groove is moved along the inside of the movement axis locus of the thread ring catching end of the horizontal hook. The above-mentioned defects are eliminated by making the needle synchronously follow the moving needle and swing directly below the needle, so that the small needle hole is always located at the point of descent of the needle.

以下本考案の実施態様を図面によって説明すれば、１は
水平式糸輪捕捉用カマであってミシン機構（図示せず）
下にて水平面内で回転する如く軸受１２に軸承されたカ
マ軸１１の上端に固着され、ミシンの主軸（図示せず）
から適宜機構を介し一部に形成されたカマ先１０の向き
と同じ方向に回転されるようになっている。The embodiments of the present invention will be described below with reference to the drawings. 1 is a horizontal thread loop catching hook, and a sewing machine mechanism (not shown).
The main shaft (not shown) of the sewing machine is fixed to the upper end of a hook shaft 11 supported by a bearing 12 so as to rotate in a horizontal plane at the bottom.
From there, it is rotated through an appropriate mechanism in the same direction as the hook tip 10 formed in the part.

２は針穴部材であって中央部２３を前記カマ軸１１の前
記カマ１と軸受１２との間に揺動自在に嵌合させ、一方
の端部を立上らせて先端には針板に形成された円弧状の
長穴３０内にて摺動せしめられる針穴部２１を形成し該
針穴部に針６が単に貫通するに適合する最も小さい針穴
２０を設けてあり、他方の端部には針穴部材の駆動部と
の連結部２２を設けである。Reference numeral 2 designates a needle hole member whose central portion 23 is fitted in a swingable manner between the hook 1 of the hook shaft 11 and the bearing 12, with one end raised up and a needle plate at the tip. A needle hole 21 that is slidable in an arc-shaped elongated hole 30 is formed in the needle hole, and the smallest needle hole 20 that allows the needle 6 to simply pass through the needle hole is provided in the needle hole. The end portion is provided with a connecting portion 22 for connecting to the driving portion of the needle hole member.

４は針棒振巾機構（図示せず）に連結する室軸であって
、下方に揺動腕４１を固定してあり、該腕先端４２と前
記針穴部材の連結部２２とがピン５１．５２を介してリ
ング５によって連結されている。Reference numeral 4 denotes a chamber shaft connected to a needle bar swinging mechanism (not shown), and a swinging arm 41 is fixed below. .52 by a ring 5.

而して室軸４は針棒振巾機構の運動に連動して回動し揺
動腕４１を揺動運動させ、該揺動運動がリンク５を介し
て針穴部材２に伝達される。The chamber shaft 4 rotates in conjunction with the movement of the needle bar swinging width mechanism, causing the swinging arm 41 to swing, and the swinging motion is transmitted to the needle hole member 2 via the link 5.

そして該部材２に設けた針穴部２１は針板３に形成の長
穴３０内を摺動せしめられる。The needle hole portion 21 provided in the member 2 is slid within an elongated hole 30 formed in the throat plate 3.

一方前記針棒振巾機構によって運動される針６は、前記
水平カマ１の回転中心線Ｏを軸としてカマ先１０の運動
軌跡Ｒの内側に沿って揺動され選択的に設定された振巾
量の両端で降下するようになっている。On the other hand, the needle 6 moved by the needle bar swinging width mechanism swings along the inside of the movement locus R of the hook tip 10 about the rotation center line O of the horizontal hook 1, and moves with a selectively set swing width. It is designed to fall at both ends of the quantity.

そして該針６の直下は前記針穴部材の小さい針穴２０が
常に位置し該針穴２０の位置を揺動させる針穴部材２と
前記針６を担持した針棒の揺動部材（図示せず）とは両
者共にその運動中心を前記水平カマの回転中心Ｏに一致
させて設けてあり針穴部材２は前記室軸４を介して針と
同期して運動されるようになっており、針６に針穴２０
が追従して共に揺動され針６の降下点に針穴２０が常に
位置されるように戒っている。A small needle hole 20 of the needle hole member is always located directly below the needle 6, and a needle hole member 2 that swings the position of the needle hole 20 and a swinging member of the needle bar that supports the needle 6 (not shown) Both of them are arranged so that their centers of motion coincide with the rotation center O of the horizontal hook, and the needle hole member 2 is moved in synchronization with the needle via the chamber shaft 4, Needle hole 20 on needle 6
follows and swings together to ensure that the needle hole 20 is always located at the point where the needle 6 descends.

以上の如く本考案は構成されているので、針の振巾量が
変化すればそれに応じて針穴も自動的に変化し針と針穴
は常に一致して揺動するので、ジグザグミシンであって
も針に対する針穴の状態があたかも直線縫における単−
丸針穴と殆ど同じになり、従来のジグザグミシンにおけ
る布のバタツキ現象は完全に防止され目トビ等の欠点が
除去せられて常に良好な縫いを行なうことができ、縫製
作業上極めて有効なものであり、又針穴部材がカマ軸と
同心で揺動されるので運動が極めて円滑であり機構精度
の向上及び維持が容易である等工作上の効果も多大であ
る。Since the present invention is constructed as described above, when the amount of oscillation of the needle changes, the needle hole automatically changes accordingly, and the needle and needle hole always oscillate in unison, making it possible to use a zigzag sewing machine. However, the condition of the needle hole relative to the needle is as if it were a straight stitch.
The hole is almost the same as that of a round needle, completely preventing the fabric flapping phenomenon that occurs with conventional zigzag sewing machines, eliminating defects such as stitching, and ensuring good stitching at all times, making it extremely effective for sewing work. In addition, since the needle hole member is swung concentrically with the hook shaft, the movement is extremely smooth, and mechanical precision can be improved and maintained easily, which has many advantages in terms of workmanship.

尚本実施例は１本針のものを示したが、針穴を揺動方向
に長目に形成することで２本針用とすることも可能であ
る。Although this embodiment shows a one-needle device, it is also possible to use a two-needle device by making the needle hole longer in the swinging direction.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案実施例の主要部斜視図である。 １・・・・・・水平カマ、２・・・・・・針穴部材、２
０・・・・・・針穴、２１・・・・・・針穴部、２２・
・・・・・連結部、２３・・・・・・中央部、３・・・
・・・針板、３０・・・・・・長溝、４・・・・・・室
軸、４１・・・・・・揺動腕、４２・・・・・・揺動腕
先端、５・・・・・・リンク、６・・・・・・針、１０
・・・・・・カマ先、１１・・・・・・カマ軸、１２・
・・・・・軸受、５１．５２・・・・・・ピン。FIG. 1 is a perspective view of the main parts of an embodiment of the present invention. 1...Horizontal hook, 2...Needle hole member, 2
0... needle hole, 21... needle hole part, 22.
...Connection part, 23...Central part, 3...
... Throat plate, 30... Long groove, 4... Chamber axis, 41... Rocking arm, 42... Rocking arm tip, 5. ...Link, 6...Needle, 10
...Kickle tip, 11...Kickle shaft, 12.
...Bearing, 51.52 ...Pin.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 水平カマ型式のジグザグミシンにおいて、針が貫通適合
する最小針穴を設けた針穴部材の針穴部がミシン機構上
（針板）に設けた円弧状の長溝に嵌合され、該針穴部材
が水平カマ下方においてカマ軸と同軸心に枢着され且つ
針の振巾機構と同期して揺動され、該部材の前記針穴が
前記水平カマのカマ先運動軌跡に沿い振巾運動する針に
追従されて該針直下にて揺動され該針穴が前記針の降下
点に常に位置される如くした針棒振巾機構。In a horizontal hook type zigzag sewing machine, the needle hole part of the needle hole member, which has the smallest needle hole that the needle can pass through, is fitted into an arc-shaped long groove provided on the sewing machine mechanism (throat plate), and the needle hole part of the needle hole member is A needle which is pivotally mounted below the horizontal hook coaxially with the hook shaft and is oscillated in synchronization with a swinging mechanism of the needle, and the needle hole of the member moves swinging along the hook tip movement locus of the horizontal hook. a needle bar swinging mechanism that swings just below the needle so that the needle hole is always located at the point of descent of the needle;