JP3586408B2

JP3586408B2 - Sewing machine foot

Info

Publication number: JP3586408B2
Application number: JP2000091424A
Authority: JP
Inventors: 耕一岡田; 昌夫宮武
Original assignee: ペガサスミシン製造株式会社
Priority date: 2000-03-29
Filing date: 2000-03-29
Publication date: 2004-11-10
Anticipated expiration: 2020-03-29
Also published as: JP2001276459A

Description

【０００１】
【産業上の利用分野】
本発明は、ミシンの押え足に関するもので、２つの布縁を互いに突き合わせた状態で重ね合わせ、偏平縫いによる飾り縫いでその重ねられた部分を覆いながら２つの布を継ぎ合わせるようにしたミシンに用いる。
【０００２】
【従来の技術】
この種のミシンは実公昭５９−３４４５７号公報に開示されている。このミシンでは、縫製前の準備として、２つの布縁部を上向き凸字状に立ち上がらせて他の部分を左右に平らにひろげ、ミシンの押え金で左右に分岐した押え足間の通路にその立ち上がらせた部分をセットし、他の部分を押え足に取り付けられた押えシューで弾性的に押圧させる。そして、その立ち上がり部分の上部を押さ足に設けたカッターで一定高さに切り揃えながら一方の布縁を平らに倒すとともに、他方の布縁をその上側に重なり合うように倒し、重ねた部分に飾り縫いを行うようにしている。その結果、２つの布を継ぎ合わせている。
【０００３】
ところが、このような従来のミシンの押え金では、押えシューの前方を押え足に固定させている為に左右の布地厚さの違いや段部があると、左右の押えシューを夫々適宜の力で布地を押圧できなかったり、一方の押えシューのみで布地を押圧する、いわゆる片押えとなってしまい、その結果、布地づまりや布地の縫いずれが発生し易くなるという問題があった。また、押えシューの前部が固定され拘束されている為に押えシューが押え足の布送り方向の断面形状に沿わず、押えシュー底面の布地押圧部全面に亘り均等な力で布地を押圧する事が難しくなる結果、押えシューの一部で布地を押圧して、布地が薄物の場合には送り傷が付くという問題があった。
【０００４】
【発明が解決しようとする課題】
従って、本発明の課題は、上記のような継ぎ合わせ用のミシンにおいて、継ぎ合わせる布地が相互にずれたり、縫いづまりが生じたり、また、布地に送り傷が付くことなく円滑に縫製できる押え金を提供することにある。
【０００５】
【課題を解決するための手段】
本発明に係る発明は、左右に分岐して平行に配置された２つの押え足の間を通路とし、一方の押え足に受けメスを固定するとともに、他方の押え足にその受けメスに向かって進退し受けメスと協働して上記通路に通される布縁の立ち上がり部を一定の高さに切り揃える可動メスを取り付け、各押え足に夫々個別に取り付けられた板バネ状の押えシューで布地を弾性的に押圧するようにしたミシンの押え金において、前記各押え足に対し前記押えシューをその前方部において段付きネジで上下にスライド可能に支持するとともに、該段付きネジにおける押えシューのスライド部に、前記板バネ状の押さえシューより弾力性の弱い圧縮バネを介装し、該圧縮バネで各押え足の底部と押えシューとを個別に弾性的に離間させるようにしたことを特徴とする。
【０００６】
【作用】
本発明によれば、縫製に先立って、押え足間の通路に２つの布縁を立ち上がらせた状態にしてその布地を板バネ状の押えシューの下に導かせておく。そして、ミシンを作動させると、受けメスと可動メスとにより布縁の立ち上がり部が一定の高さに切り揃えられながら通過していく。この時、左右の押え足に対してその前方部において上下スライド可能に且つ押え足の底部とを弾性的なフローティング状態に取り付けた押えシュー、いわゆるフローティング押えシューは左右夫々の布地厚さに応じて左右夫々の布地を適宜押圧し、かつ、その押圧は押えシューの底面全体で略均等に左右夫々の布地へ行われることとなる。
【０００７】
また、布地の段部が押え足の下に到達した時に、押え足と離間していた押えシューが圧縮バネに抗して上方に押上げられて前上がりの状態となりながら布地を押圧する。布地への押圧は前記同様の作用を奏することとなる。
【０００８】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１は本発明の実施例を示す分解斜視図である。押え足１は、針孔４に向かって延びる通路５が形成されるよう左右に分岐して平行に配置された２つの押え足２，３を備える。また、シャンク６内には、バネ７で押下げられる補助押え足８が装填されている。この補助押え足８は、上記通路５を介して針孔４の下方を通過した布縁の部分を上方より押圧する。一方の押え足２の上面には、後述のメスによって切断された布の切り屑を後方に排出する案内溝９が形成されている。この案内溝９は、布の切り屑が針孔４の上方に行かぬよう通路５の後方より斜めに形成されている。
【０００９】
各押え足２，３には外壁面より通路５に向かって水平方向に溝１０と孔１１とが形成されている。一方の押え足の溝１０には受けメス１２が固定されている。この受けメス１２の刃先は通路５内に適宜突出している。他方の押え足の孔１１には公知の駆動機構（図示せず）により往復運動する可動メス１３が配置されている。両メス１２，１３の協働により、通路５を通過する布縁の立ち上がり部が一定の高さで切り揃えられる。
【００１０】
また、各押え足２，３の底部にはそれぞれ板バネの両端を屈曲形成させた押さえシュー１４，１５が配置されている。押えシュー１４，１５は、図２に示すように、押え足２，３の前方部に配置された段付きネジ１６，１７によって上下にスライド可能に支持され、そのスライド部１８，１９に圧縮バネ２０，２１が介装されている。この圧縮バネ２０，２１は、押えシュー１４，１５よりも弾力性を弱くしており、押え足の底部と押えシュー１４，１５とを離間させるようにしている。
【００１１】
以上に述べたミシンの押え金につき、その作用を説明する。先ず、押え金１をミシンに備えられた公知の針板２２より離間させる。次に、左右から突き合わせて凸状に立ち上がらせた２枚の布地Ｗ１，Ｗ２を押え金と針板との間に送込む。そして、布地Ｗ１，Ｗ２の立ち上がり部ｅ１，ｅ２を通路５に配置させたのち押え金を下ろして布地をセットする。セットされた布地Ｗ１，Ｗ２は押え金の押えシュー１４，１５で弾力的に針板２１に押圧される。
【００１２】
この状態でミシンを駆動させると、ミシンに備えられた公知の送り歯（図示せず）により立ち上がり部ｅ１，ｅ２が通路５内に送り込まれ、可動メス１３と受けメス１２でその立ち上がり部の上端が一定の高さに切り揃えられる。引き続く布送り時において、立ち上がり部ｅ１は立ち上がり部ｅ２側に倒され、立ち上がり部ｅ２は平坦に延ばされた立ち上がり部ｅ１の上に重ねられる。そして、その重ねられた部分に、ミシンによる飾り縫いが行われ、２つの布地Ｗ１，Ｗ２とが継ぎ合わされる。ミシンの動作中において布地の段部が押え足の下に到達した時に押えシュー１４，１５が圧縮バネ２０，２１に抗して上方に押上げられて前上がりとなり、浮かし押えシューとなっているので左右の布地が夫々の押えシュー底面全体で押圧される。また、左右布地厚さが違っても片押えすることなく左右夫々の適宜押圧で左右の布地を押える。
【００１３】
【発明の効果】
以上のように、本発明によれば、左右夫々の押え足にその前方部において上下スライド可能に支持された板バネ状の押えシューが左右別々に布地を押圧するので、左右布地厚が違っていてもミシン駆動時における布地の直進性が向上して送り性能が安定するとともに、厚物布地による縫いづまり、布地ずれ及び送り傷を防ぐことができる。
【００１４】
また、布地の段部が押え足の下に到達した時に押えシューが圧縮バネに抗して上方に押上げられて前上がりとなり、押えシュー底面全体で布地を押圧するので、対象となる布地が薄物でも送り傷の発生を軽減できる。
【図面の簡単な説明】
【図１】本発明に適用されたミシンの押え金を示す分解斜視図である。
【図２】同上ミシンの押え金の一部を示す概略側面図である。
【図３】同上ミシンにセットされた布地を説明する部分断面図である。
【符号の説明】
１押え金
２，３押え足
５通路
１２受けメス
１３可動メス
１４，１５押えシュー
１６，１７段付きネジ
１８，１９スライド部
２０，２１圧縮バネ
ｅ１，ｅ２立ち上がり部
Ｗ１，Ｗ２布地[0001]
[Industrial applications]
The present invention relates to a presser foot of a sewing machine, and relates to a sewing machine in which two cloths are overlapped in a state where two fabric edges abut against each other, and the two cloths are joined together while covering the overlapped portion by decorative stitching by flat stitching. Used.
[0002]
[Prior art]
This type of sewing machine is disclosed in Japanese Utility Model Publication No. 59-34457. In this sewing machine, as a preparation before sewing, the two cloth edges are raised in an upwardly convex shape, the other part is spread out flat to the left and right, and the presser foot of the sewing machine is inserted into the passage between the presser feet which is branched right and left. The raised part is set, and the other part is elastically pressed by the presser shoe attached to the presser foot. Then, while cutting the upper part of the rising part to a certain height with a cutter provided on the presser foot, flatten one fabric edge and lower the other fabric edge so that it overlaps the upper side, and decorate the overlapped part I try to sew. As a result, the two cloths are spliced.
[0003]
However, in such a conventional presser foot of the sewing machine, since the front of the presser shoe is fixed to the presser foot, if there is a difference in the thickness of the left and right fabrics or a step, the right and left presser shoes are respectively adjusted to an appropriate force. Therefore, there is a problem that the fabric cannot be pressed, or the fabric is pressed with only one of the pressing shoes, that is, a so-called one-sided presser, and as a result, the fabric is liable to be jammed or sewn. In addition, since the front portion of the presser shoe is fixed and restrained, the presser shoe does not follow the cross-sectional shape of the presser foot in the fabric feeding direction, and presses the fabric with an even force over the entire fabric pressing portion on the bottom surface of the presser shoe. As a result, there is a problem that the cloth is pressed by a part of the presser shoe and the feed is damaged when the cloth is thin.
[0004]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a presser foot that can sew smoothly without splicing fabrics or stitches in the seam sewing machine as described above. To provide.
[0005]
[Means for Solving the Problems]
The invention according to the present invention provides a passage between two presser feet that are branched in the left and right directions and arranged in parallel, and a receiving knife is fixed to one of the presser feet, and the other presser foot is directed toward the receiving knife. Install a movable knife that trims the rising edge of the cloth edge passed through the above passage to a certain height in cooperation with the receiving knife, and with a leaf spring-like presser shoe individually attached to each presser foot, In a presser foot of a sewing machine which elastically presses a fabric, the presser shoe is slidably supported vertically by a stepped screw at a front portion of each presser foot, and a presser shoe of the stepped screw is provided. of the slide portion, interposed a weak compression spring resilient than the plate spring-like pressing shoe, that it has to be separated individually elastically the bottom and pressing the shoe of each presser foot in the compression spring Characteristic To.
[0006]
[Action]
According to the present invention, prior to sewing, the two fabric edges are raised in the passage between the presser feet, and the fabric is guided under the leaf spring-like presser shoe. Then, when the sewing machine is operated, the rising edge of the cloth edge is passed through the receiving knife and the movable knife while being trimmed to a certain height. At this time, the presser shoe, which is slidable up and down at the front part of the left and right presser feet and the bottom of the presser foot is attached in an elastic floating state, so-called floating presser shoe, according to the left and right fabric thicknesses. The left and right fabrics are appropriately pressed, and the pressing is performed substantially uniformly on the left and right fabrics over the entire bottom surface of the holding shoe.
[0007]
When the step portion of the fabric reaches below the presser foot, the presser shoe, which has been separated from the presser foot, is pushed upward against the compression spring, and presses the fabric in a state of rising forward. Pressing the fabric has the same effect as described above.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of the present invention. The presser foot 1 includes two presser feet 2 and 3 which are branched in the left and right directions and arranged in parallel so that a passage 5 extending toward the needle hole 4 is formed. An auxiliary presser foot 8 that is pressed down by a spring 7 is mounted in the shank 6. The auxiliary presser foot 8 presses, from above, a portion of the cloth edge that has passed below the needle hole 4 through the passage 5. A guide groove 9 is formed on the upper surface of one presser foot 2 to discharge backward a piece of cloth cut by a scalpel. The guide groove 9 is formed obliquely from the rear of the passage 5 so that the chips of the cloth do not go above the needle hole 4.
[0009]
A groove 10 and a hole 11 are formed in each of the presser feet 2 and 3 in the horizontal direction from the outer wall surface toward the passage 5. A receiving knife 12 is fixed to the groove 10 of one presser foot. The cutting edge of the receiving knife 12 appropriately protrudes into the passage 5. A movable knife 13 that reciprocates by a known drive mechanism (not shown) is arranged in the hole 11 of the other presser foot. By the cooperation of the two knives 12, 13, the rising portion of the cloth edge passing through the passage 5 is trimmed at a constant height.
[0010]
Pressing shoes 14 and 15 having both ends of a leaf spring bent are disposed at the bottoms of the presser feet 2 and 3, respectively. As shown in FIG. 2, the holding shoes 14 and 15 are slidably supported vertically by stepped screws 16 and 17 disposed in front of the holding feet 2 and 3, and compression springs are provided on the sliding portions 18 and 19 thereof. 20, 21 are interposed. The compression springs 20 and 21 have a lower elasticity than the holding shoes 14 and 15 so as to separate the bottom of the holding foot from the holding shoes 14 and 15.
[0011]
The operation of the presser foot of the sewing machine described above will be described. First, the presser foot 1 is separated from the known needle plate 22 provided on the sewing machine. Next, the two cloths W1 and W2, which are raised from the left and right butted up, are fed between the presser foot and the needle plate. After the rising portions e1 and e2 of the fabrics W1 and W2 are arranged in the passage 5, the presser foot is lowered and the fabric is set. The set fabrics W1 and W2 are elastically pressed against the needle plate 21 by the presser shoes 14 and 15 of the presser foot.
[0012]
When the sewing machine is driven in this state, the rising portions e1 and e2 are fed into the passage 5 by a known feed dog (not shown) provided on the sewing machine, and the movable knife 13 and the receiving knife 12 form the upper end of the rising portion. Is trimmed to a certain height. During the subsequent cloth feeding, the rising portion e1 is tilted toward the rising portion e2, and the rising portion e2 is overlaid on the flatly extending rising portion e1. Then, decorative sewing with a sewing machine is performed on the overlapped portion, and the two fabrics W1 and W2 are joined. During the operation of the sewing machine, when the stepped portion of the fabric reaches below the presser foot, the presser shoes 14, 15 are pushed upward against the compression springs 20, 21 and rise forward, thereby forming a floating presser shoe. Therefore, the left and right fabrics are pressed on the entire bottom surface of each press shoe. Also, even if the thicknesses of the right and left fabrics are different, the left and right fabrics can be pressed by appropriate pressing of the right and left without pressing one side.
[0013]
【The invention's effect】
As described above, according to the present invention, the left and right presser feet press the fabric separately on the left and right because the leaf spring-shaped presser shoes slidably supported at the front part thereof in a vertically slidable manner. Even when the sewing machine is driven, the straightness of the fabric is improved, and the feeding performance is stabilized. In addition, it is possible to prevent stitches due to a thick fabric, displacement of the fabric, and damage to the feeding.
[0014]
Also, when the step of the fabric reaches below the presser foot, the presser shoe is pushed upward against the compression spring and rises forward, pressing the fabric over the entire bottom surface of the presser shoe. The occurrence of feed scratches can be reduced even with thin objects.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a presser foot of a sewing machine applied to the present invention.
FIG. 2 is a schematic side view showing a part of a presser foot of the sewing machine.
FIG. 3 is a partial cross-sectional view illustrating a cloth set on the sewing machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Presser foot 2, 3 Presser foot 5 Passage 12 Receiving knife 13 Movable knife 14, 15 Pressing shoe 16, 17 Stepped screw 18, 19 Slide part 20, 21 Compression spring e1, e2 Rising part W1, W2 Cloth

Claims

A path is formed between two presser feet that are branched in the left and right directions and are parallel to each other. A receiving knife is fixed to one presser foot, and the other presser foot advances and retreats toward the receiving knife and cooperates with the receiving knife. Then, a movable scalpel for trimming the rising edge of the cloth edge passed through the passage to a fixed height is attached, and the cloth is elastically pressed by a leaf spring-shaped presser shoe individually attached to each presser foot. In the presser foot of the sewing machine described above, the presser shoe is slidably supported by a stepped screw at a front portion of the presser foot with respect to each of the presser feet, and the plate is attached to a slide portion of the presser shoe in the stepped screw. interposed weaker compression spring than spring-like presser shoe resilient presser foot of the sewing machine, characterized in that the bottom and the pressing shoe of each presser foot in the compression spring so as to individually resiliently spaced