JPS6012524Y2 - Sewing machine cloth feed device - Google Patents

Description

【考案の詳細な説明】 この考案は、押え金、の下面と布の上面との間にベルト
を挿通し、このベルトと下送り歯との協働により布送り
を行うようにしたミシンの布送り装置に関するものであ
る。[Detailed description of the invention] This invention is a sewing machine in which a belt is inserted between the lower surface of the presser foot and the upper surface of the cloth, and the cloth is fed by the cooperation of this belt and the lower feed dog. This relates to a feeding device.

従来、縁かがり縫いミシ等においては、例えば実開昭５
６−１１７７涛に示されているように、ベット上面およ
び下面においてそれぞれ主軸に連動して四運動する上送
り歯及び下送り歯の協働により、上下に重ねた二枚の布
を挾み送るようにした、いわゆる上送り機構が採用され
ているが、このようなものにおいては、上下送り歯が局
所的に布を挟圧するので布に加えられる圧力が大きく、
従って薄物の布や傷つきやすい布を送る場合には上下送
り歯によって布に皺や傷がつけられてしまうという欠点
があった。Conventionally, for edge stitching, etc., for example,
As shown in Figure 6-1177, two pieces of cloth stacked one above the other are sandwiched and fed by the cooperation of the upper and lower feed teeth that move in conjunction with the main shaft on the top and bottom surfaces of the bed, respectively. A so-called top feed mechanism is used, but in such a device, the upper and lower feed dogs locally pinch the cloth, so the pressure applied to the cloth is large;
Therefore, when feeding thin cloth or cloth that is easily damaged, there is a drawback that the cloth is wrinkled or scratched by the upper and lower feed dogs.

そこで、この欠点を解決するために上送り歯の代わりに
押え金の下面と上布の上面との間に、両端を機枠に支持
したプーリーに掛は渡した粗面の無端ベルトを挿通し、
このプーリーをステッピングモータ等の駆動手段により
回動させてベルトと下送り歯との協動で上下の布を移送
するようにしたものが知られているが、このようなもの
においてはステッピングモータ及びその駆動回路等の装
置が必要となるため、コストが高価になるとともに、ス
テッピングモータと主軸との同期をはからねばならず装
置が複雑になる欠点があった。Therefore, in order to solve this problem, instead of the upper feed dog, an endless belt with a rough surface was inserted between the lower surface of the presser foot and the upper surface of the upper cloth, and the belt was passed through a pulley with both ends supported on the machine frame. ,
It is known that this pulley is rotated by a driving means such as a stepping motor, and the upper and lower cloths are transferred by cooperation between a belt and a lower feed dog. Since a device such as a drive circuit is required, the cost becomes high, and the stepping motor and the main shaft must be synchronized, making the device complicated.

この考案は、ステッピングモータ等を使用することなく
、従来の上下送り歯を備えたミシンにおいてベルト送り
を行うことのできる安価な布送り装置を提供することを
目的とする。The object of this invention is to provide an inexpensive cloth feeding device that can perform belt feeding in a conventional sewing machine equipped with upper and lower feed dogs without using a stepping motor or the like.

以下、図面によりこの考案の実施例を説明すると、第１
図は例えば綬開昭５６−１１７７涛公報に示されるよう
な上送り機構を備え、メスＭにより布端を切り落としな
がら布の一側端縁に縁かがり縫いを行うミシンであり、
上送り機構については上記公報に詳細に述べられている
のでその説明は省略する。Hereinafter, an embodiment of this invention will be explained with reference to the drawings.
The figure shows a sewing machine that is equipped with an upper feed mechanism as shown in, for example, the official gazette of 1177-1982, and performs overlock stitching on one side edge of the fabric while cutting off the edge of the fabric with a scalpel M.
The upper feed mechanism is described in detail in the above publication, so its explanation will be omitted.

基端を機枠に、垂直軸線を中心に回動可能に支持した押
え腕２は、自由端に押え金３を固定し、押え棒４の下方
への弾性力により押え金３を、布台１の針板１ａ下方よ
り主軸に連動して出没する下送り歯８上方に対向して、
針板１ａに押圧する。The presser foot 2 has its base end supported on the machine frame and is rotatable around a vertical axis.The presser foot 3 is fixed to the free end of the presser foot 2, and the downward elastic force of the presser rod 4 moves the presser foot 3 onto the fabric table. A lower feed dog 8 that protrudes and retracts from below the throat plate 1a of No. 1 in conjunction with the main shaft,
Press it against the throat plate 1a.

押え金３よりも布送り方向先方において、上端面を平坦
面とした受台７を布が移動し得るように布台１の上方に
離隔して機枠に固定配置し、基端を前記上送り機構に連
結し四運動を行う上送り腕５の先端には下面に歯６ａを
設けた上送り歯６を受は台７に対向して固定する。A cradle 7 whose upper end surface is a flat surface is fixed to the machine frame at a distance above the cloth pedestal 1 so that the cloth can move, and the base end is fixed to the machine frame at a position further forward than the presser foot 3 in the cloth feeding direction. At the tip of the upper feed arm 5, which is connected to the feed mechanism and performs four movements, an upper feed tooth 6 having teeth 6a on the lower surface is fixed facing a support base 7.

上送り歯６よりも布送り方向先方に配置したプーリー９
及び押え金３よりも布送り方向手前に配置したプーリー
１２を、それぞれ布送り方向と交叉する一固定軸線を中
心に回動可能に機枠に支持し、プーリー９上方に対向配
置したプーリー１０及びプーリー１２上方に対向配置し
たプーリー１１を、それぞれブー１，１−９．１２に平
行する一固定軸線を中心に回動可能に機枠に支持する。A pulley 9 placed ahead of the upper feed dog 6 in the cloth feeding direction
A pulley 12 disposed in front of the presser foot 3 in the cloth feeding direction is supported on the machine frame so as to be rotatable about a fixed axis that intersects with the cloth feeding direction, and a pulley 10 and Pulleys 11 disposed opposite to each other above pulleys 12 are supported on a machine frame so as to be rotatable about fixed axes parallel to the respective boozes 1, 1-9 and 12.

これらのプーリー９．１０，１１．１２に対し、表裏面
を粗面とした無端ベルトＢを、押え全３下面と針板１ａ
上面の間に挿通し且つ上送り歯６と受は台７上面との間
を経由させて各プーリー間に掛は渡す。For these pulleys 9.10, 11.12, an endless belt B with rough front and back surfaces is attached to the lower surface of all the presser foot 3 and the throat plate 1a.
The hook is passed between each pulley by being inserted between the upper surfaces, and passing between the upper feed dog 6 and the upper surface of the stand 7.

尚、このときベルトＢの幅は、ベルトＢが針落ち点を覆
わないように設定されである。At this time, the width of the belt B is set so that the belt B does not cover the needle drop point.

この考案は以上の構成であり、次に作用を説明する。This invention has the above structure, and its operation will be explained next.

上送り歯６と下送り歯８の送りピッチが等しくなるよう
に設定した後、押え金３の下面に接触するベルトＢの下
面と布台１との間に上下に重ね合わせた二枚の布Ｗ１．
Ｗ２を挿入しミシンを作動させると、下方の布Ｗ２は下
送り歯８の運動によって所定のピッチづつ布送り方向先
方（第３図左方）へ移送される。After setting the feed pitch of the upper feed dog 6 and the lower feed dog 8 to be equal, two pieces of fabric are stacked vertically between the bottom surface of the belt B that contacts the bottom surface of the presser foot 3 and the cloth table 1. W1.
When W2 is inserted and the sewing machine is operated, the lower cloth W2 is transferred forward in the cloth feeding direction (to the left in FIG. 3) by a predetermined pitch by the movement of the lower feed dog 8.

一方、受は台７上面を経由するベルトＢの上面に対向す
る上送り歯６はベルトＢを布送り方向先方側へ引き掻き
、ベルトＢの上面が摩擦性の粗面であるためベルトＢの
上面に上送り歯６の歯６ａが係合して上送り歯６の送り
ピッチ分だけベルトＢは布送り方向先方（第３図Ｆ方向
）に移動する。On the other hand, the upper feed dog 6 facing the upper surface of the belt B passing through the upper surface of the stand 7 scratches the belt B in the forward direction in the cloth feeding direction. The teeth 6a of the upper feed dog 6 engage with the upper surface, and the belt B moves forward in the cloth feed direction (direction F in FIG. 3) by the feed pitch of the upper feed dog 6.

このとき、押え金３の下面のベルトＢは押え棒４の押圧
力により布Ｗ□の上面に圧接し、ベルトＢの下面が摩擦
性の粗面であるためベルトＢ下面と布Ｗ１上面との摩擦
力が大きいのでこのベルトＢの移動に伴い、ベルトＢの
移動量と等しいピッチだけ布Ｗ１が布送り方向先方に送
られ、上下送り歯６，９の送り量が等しいので布Ｗ□と
布Ｗ２の送りピッチが等しくなり布Ｗ□と布Ｗ２とがず
れることはない。At this time, the belt B on the lower surface of the presser foot 3 comes into pressure contact with the upper surface of the cloth W □ due to the pressing force of the presser foot 4, and since the lower surface of the belt B is a frictional rough surface, the lower surface of the belt B and the upper surface of the cloth W1 are in contact with each other. Since the frictional force is large, as the belt B moves, the cloth W1 is sent forward in the cloth feeding direction by a pitch equal to the amount of movement of the belt B. Since the feeding amounts of the upper and lower feed dogs 6 and 9 are equal, the cloth W□ and the cloth Since the feed pitch of W2 is equal, the cloth W□ and the cloth W2 will not deviate from each other.

次に本考案の他の実施例について説明すると、上記の構
成において、第４図に示すように受は台７を取り外し、
上送り腕５には、布台１に載置した布に直接接触可能に
歯１３ａを低い位置に設けた従来の上送り歯１３を固定
し、布Ｗ□上にあるベルトＢの上面を引き掻くようにす
る。Next, another embodiment of the present invention will be described. In the above structure, as shown in FIG.
A conventional upper feed dog 13, which has teeth 13a at a low position so as to be able to directly contact the cloth placed on the cloth table 1, is fixed to the upper feed arm 5, and is used to pull the upper surface of the belt B on the cloth W□. Make it scratch.

この実施例においては、布Ｗ１に接触するベルトＢの面
積が広いので布Ｗ１に対する摩擦力が大きく、布送り力
が大きいという長所がある一方手動操作により布送り方
向を変更することが難しいという欠点もある。In this embodiment, since the area of the belt B in contact with the cloth W1 is large, the frictional force against the cloth W1 is large and the cloth feeding force is large, which is an advantage. However, the disadvantage is that it is difficult to change the cloth feeding direction by manual operation. There is also.

以上のように、この考案によれば、押え金の下面と布の
上面との間に挿通した布送りのためのベルトを、上送り
歯の引き掻き動作により布送り方告先方へ移動させるよ
うにしたので、従来のようにステッピングモータ等の別
個の作動手段を要することなく、実開昭５６−１１７７
２−Ｗに示されるような上送り機構をそのまま使用する
ことにより安価な、ベルトによる布送り装置を得ること
ができる。As described above, according to this invention, the cloth feeding belt inserted between the lower surface of the presser foot and the upper surface of the cloth is moved toward the cloth feeding destination by the scratching action of the upper feed dog. As a result, there is no need for a separate actuating means such as a stepping motor as in the conventional case.
By using the upper feeding mechanism as shown in 2-W, an inexpensive belt-based cloth feeding device can be obtained.

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

第１図は本実施例のミシンの針視図、第２図は上送り歯
によるベルト送り動作を示す図、第３図はプーリーにベ
ルトを掛は渡した状態を示す図、第４図は本発明の他の
実施例を示す図である。 訃・・・・・下送り歯、３・・・・・・押え金、６，１
３・・曲上送り歯、９，１０，１１．１２・・・・・・
プーリーＢ・・・・・・ベルト。Fig. 1 is a needle view of the sewing machine of this embodiment, Fig. 2 is a drawing showing the belt feeding operation by the upper feed dog, Fig. 3 is a drawing showing the state in which the belt is hooked onto the pulley, and Fig. 4 is a drawing showing the belt feeding operation by the upper feed dog. It is a figure which shows another Example of this invention. Death...Lower feed dog, 3...Presser foot, 6,1
3...Curved feed dog, 9, 10, 11.12...
Pulley B...Belt.

Claims (1)

【実用新案登録請求の範囲】 主軸に連動して針板上方に出没し送り運動を行う下送り
歯と、 下送り歯上方に対向して上下動可能に機枠に支持し針板
に圧接する弾性力を受ける押え金と、下送り歯よりも布
送り方向の先方に離隔して針板上方に配置し主軸に連動
して下送り歯とは水平方向へ等しい布送り運動を行う上
送り歯と、布送り方向の水平の交叉方向に沿う固定軸線
を中心に各別に回動可能に針板上方の機枠に支持した複
数のプーリーと、 表裏面を摩擦性のある粗面とし押え全下面と針板上面と
の間を挿通し上送り歯に係合して布送り方向先方へ移送
されるように各プーリーに掛は渡した無端状のベルトＢ
１ とを備えたミシンの布送り装置。[Scope of Claim for Utility Model Registration] A lower feed dog that appears and retracts above the throat plate in conjunction with the main shaft to perform feeding motion, and a lower feed dog that is opposed to the upper part of the lower feed dog and is supported on the machine frame so as to be movable up and down and pressed against the throat plate. A presser foot that receives an elastic force, and an upper feed dog that is placed above the throat plate and spaced apart from the lower feed dog in the cloth feeding direction, and that is linked to the main shaft and performs the same cloth feed movement in the horizontal direction as the lower feed dog. , multiple pulleys supported on the machine frame above the throat plate so as to be rotatable individually about fixed axes along the horizontal cross direction of the cloth feeding direction, and the entire lower surface of the presser foot whose front and back surfaces are rough surfaces with friction. An endless belt B is passed through each pulley so as to be inserted between the upper surface of the needle plate and the upper surface of the throat plate, and to be engaged with the upper feed dog and transported forward in the cloth feed direction.
1. A cloth feeding device for a sewing machine comprising: