JP7397545B1

JP7397545B1 - sewing equipment

Info

Publication number: JP7397545B1
Application number: JP2023100965A
Authority: JP
Inventors: 元巳杉山
Original assignee: 株式会社エスポアール
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-12-13
Anticipated expiration: 2043-06-20

Abstract

【課題】縫製作業の負担を軽減しつつ、縫製強度を保つ縫製装置を提供する。【解決手段】縫製装置は、上ルーパー１０が布縁側の外側から前記布縁側の内側に向かって前進して行く際に、前記上ルーパー１０の本体と前記上ルーパー１０の先端部から出る第一の糸２０が撓むことにより生じた前記第一の糸２０と上ルーパー１０との隙間の内側を前記第一の針１２が第二の糸２１を保持しながら降下し、前記第二の針１３は、前記隙間の外側を降下すると共に、前記上ルーパー１０は後退を開始し、縫製作業が完了した状態において、表面のかがり幅が前記第一の針１２の位置に、裏面のかがり幅が前記第二の針１３の位置となるオーバーロック縫いを形成しつつ、本縫いを同時に行うように構成されている。【選択図】図１An object of the present invention is to provide a sewing device that maintains sewing strength while reducing the burden of sewing work. The sewing device includes a main body of the upper looper 10 and a first part that comes out from the tip of the upper looper 10 when the upper looper advances from the outside of the cloth edge side to the inside of the cloth edge side. The first needle 12 descends while holding the second thread 21 inside the gap between the first thread 20 and the upper looper 10 caused by the bending of the thread 20, and the second needle 13 descends outside the gap, and the upper looper 10 starts to retreat, and when the sewing work is completed, the stitching width on the front side is at the position of the first needle 12, and the stitching width on the back side is at the position of the first needle 12. It is configured to simultaneously perform lock stitching while forming an overlock stitch at the position of the second needle 13. [Selection diagram] Figure 1

Description

本発明は、オーバーロック縫い目を形成する縫製装置に関する。 The present invention relates to a sewing device for forming overlock seams.

一般に、布端の始末及び解れ防止としてオーバーロック縫いが施されることがある。このオーバーロック縫いは、主軸に連動して上下動する縫針と、主軸に連動して往復運動する上ルーパー及び下ルーパーとを有する公知のオーバーロックミシンを用いて、前記縫針に通される縫い糸と、ルーパーへ通されるルーパー糸を用いて行われ、縫い目を形成する（例えば、特許文献１参照）。 Generally, overlock stitching is sometimes performed to finish the edges of the fabric and to prevent it from unraveling. This overlock sewing is performed by using a known overlock sewing machine that has a sewing needle that moves up and down in conjunction with the main shaft, and an upper looper and a lower looper that reciprocate in conjunction with the main shaft. , is performed using a looper thread passed through a looper to form a seam (for example, see Patent Document 1).

特許第３６９９０９４号公報Patent No. 3699094

しかしながら、従来の２本針オーバーロック縫いは、４本の糸の内いずれか１つの糸が切れることで、他の３本の糸も抜けやすくなる。その為、可動域が広いワークウェア等に使用する際は、オーバーロック縫いとは別に本縫いをする必要があった。 However, in conventional two-needle overlock stitching, if any one of the four threads breaks, the other three threads also tend to come off. Therefore, when used for workwear with a wide range of motion, it was necessary to perform lock stitching in addition to overlock stitching.

かかる課題を解決するため、請求項１に係る発明は、布が進行する縫製方向に沿う布縁側の外側に配置され、前記縫製方向に対して直交する方向を往復移動する上ルーパーと、前記布縁側の内側に配置され、前記縫製方向に対して直交する方向を往復移動する下ルーパーと、前記縫製方向に対して水平面内で前記縫製方向と略直交する方向に並列に配置され、上下方向に往復移動する２本の針を有し、前記２本の針の内、一方が前記布縁側に配置された第一の針と、他方が前記第一の針より前記布縁側の内側に配置された第二の針と、前記上ルーパーの先端付近で保持された第一の糸と、前記第一の針に保持された第二の糸と、前記第二の針に保持された第三の糸と、前記下ルーパーの先端付近で保持された第四の糸とを備え、前記上ルーパーが前記布縁側の外側から前記布縁側の内側に向かって前進して行く際に、前記上ルーパーの本体と前記上ルーパーの先端部から出る前記第一の糸が撓むことにより生じた前記第一の糸と前記上ルーパーとの第一の隙間の内側を前記第一の針が前記第二の糸を保持しながら降下し、前記第二の針は、前記第一の隙間の外側を降下し、前記上ルーパーが、前記第一の針のみに前記第一の糸を引っ掛けながら前記布縁側の内側から前記布縁側の外側に向かって後退していく際に、前記第一の針は、前記第一の糸に引掛けられた状態で、更に前記第二の糸を保持しながら前記布を貫通し下死点まで下降し、前記第二の針は、前記第一の糸に引掛けられない状態で、前記第三の糸を保持しながら前記布を貫通し下死点まで下降し、前記上ルーパーが、更に前記布縁側の内側から前記布縁側の外側に向かって後退していく際に、前記第一の針と前記第二の針が前記下死点から上昇し始めると、前記第二の糸と前記第三の糸が撓み、前記撓みにより、前記第一の針と前記第二の糸の間に第二の隙間、前記第二の針と前記第三の糸との間に第三の隙間が生じ、前記下ルーパーが前記布縁側の内側から前記布縁側の外側に向かって前進すると共に、前記第二の隙間及び前記第三の隙間の内側を前記下ルーパーの先端部で保持された前記第四の糸が挿通させ、前記下ルーパーは、前記第二の隙間と前記第三の隙間に挿通した状態で、更に前記布縁側の内側から前記布縁側の外側に向かって前進して行く際に、前記第一の針と前記第二の針は、更に上昇し続け、前記布を貫通し、前記上ルーパーは、前記布縁側の外側から前記布縁側の内側に向かって前進し始め、前記下ルーパーと前記第四の糸との間に生じた第四の隙間の内側に挿通され、前記布が前記縫製方向と反対方向に所定の距離を移動し、前記上ルーパーが、更に前記布縁側の外側から前記布縁側の内側に向かって前進して行く際に、前記第一の隙間の内側を前記第一の針が前記第二の糸を保持しながら降下し、前記第二の針は、前記第一の隙間の外側を降下し、前記上ルーパーは、前記第一の針のみに前記第一の糸を引っ掛けながら前記布縁側の内側から前記布縁側の外側に向かって後退していく際に、前記第一の針は、前記第一の糸を引掛けられた状態で、更に前記第二の糸を保持しながら前記布を貫通すると共に下降し続け、前記第二の針は、前記第一の糸が引掛けられない状態で、前記第三の糸を保持しながら前記布を貫通すると共に下降し続け、前記下ルーパーは、前記第一の針と前記第二の針が下降する途中で前記布縁側の外側から前記布縁側の内側に向かって後退し、前記第一の針と前記第二の針が下降する際に、前記上ルーパーが前記第一の針のみに前記第一の糸を引っ掛けながら前記布縁側の内側から前記布縁側の外側に向かって後退し、前記下ルーパーは、前記布縁側の外側から前記布縁側の内側に向かって後退し、前記第二の隙間と前記第三の隙間を通過すると共に、前記下ルーパーの先端部に保持された前記第四の糸が前記第二の隙間と前記第三の隙間の内側を通り抜け、前記第一の針と前記第二の針が前記布を貫通しながら下降する途中で、前記第二の糸と前記第三の糸が引張られることで、前記第二の隙間と前記第三の隙間が収縮し、前記下ルーパーが、前記布縁側の外側から前記布縁側の内側に向かって後退することで保持された前記第四の糸が撓み、前記撓みにより、第五の隙間が生じ、前記上ルーパーは、前記布縁側の内側から前記布縁側の外側に向かって後退し、前記上ルーパーの先端部に保持された前記第一の糸を前記第五の隙間の内側に引っ掛けながら通過し、前記第一の針と前記第二の針が再び前記下死点から上昇し始める際に、前記下ルーパーが再び前記布縁側の内側から前記布縁側の外側に向かって前進し、前記第四の糸が引張られることで前記第五の隙間が収縮し、前記上ルーパーが、更に前記布縁側の内側から前記布縁側の外側に向かって後退することで前記第一の糸が引張られるように構成されるようになることで、表面のかがり幅が前記第一の針の位置に、裏面のかがり幅が前記第二の針の位置となるオーバーロック縫いを形成しつつ、前記表面の縫い代が前記第二の針の位置の本縫いを同時に行うように構成し、前記表面のかがりは、前記第一の糸で形成され、前記表面のかがりから離間した位置に前記第三の糸で本縫いが形成され、前記裏面のかがりは、前記第四の糸で形成され、前記第二の糸は前記第一の針の位置で縫われるように構成したことを特徴とする。
In order to solve this problem, the invention according to claim 1 provides the following: an upper looper that is disposed on the outside of the cloth edge side along the sewing direction in which the cloth advances, and that reciprocates in a direction perpendicular to the sewing direction; a lower looper disposed inside the edge side and reciprocating in a direction perpendicular to the sewing direction; It has two needles that move back and forth, one of the two needles is a first needle placed on the edge side of the fabric, and the other needle is placed inside the first needle on the edge side of the fabric. a second needle held by the upper looper, a first thread held near the tip of the upper looper, a second thread held by the first needle, and a third thread held by the second needle. and a fourth thread held near the tip of the lower looper, and when the upper looper advances from the outside of the cloth edge side toward the inside of the cloth edge side, the upper looper The first needle passes through the inside of the first gap between the first thread and the upper looper, which is caused by the bending of the first thread coming out from the main body of the main body and the tip of the upper looper. The second needle descends on the outside of the first gap , and the upper looper hooks the first thread only on the first needle while lowering the fabric edge side. When retracting from the inside of the fabric toward the outside of the edge of the fabric, the first needle is hooked to the first thread and continues to move the fabric while holding the second thread. The second needle passes through the fabric and descends to the bottom dead center while holding the third thread without being hooked to the first thread. , when the upper looper further retreats from the inside of the cloth edge side to the outside of the cloth edge side, when the first needle and the second needle begin to rise from the bottom dead center, The second thread and the third thread are deflected, and due to the deflection, a second gap is created between the first needle and the second thread, and a gap is created between the second needle and the third thread. A third gap is created in between, and the lower looper advances from the inside of the cloth edge side to the outside of the cloth edge side, and the tip of the lower looper moves inside the second gap and the third gap. The lower looper is inserted through the second gap and the third gap, and further extends from the inside of the cloth edge side to the outside of the cloth edge side. When moving forward, the first needle and the second needle continue to rise and penetrate the fabric, and the upper looper moves from the outside of the fabric edge side to the inside of the fabric edge side. The cloth begins to move forward, and is inserted into the fourth gap created between the lower looper and the fourth thread, and the cloth moves a predetermined distance in the opposite direction to the sewing direction, and then the upper looper is further moved forward from the outside of the cloth edge side to the inside of the cloth edge side, the first needle descends inside the first gap while holding the second thread, The second needle descends on the outside of the first gap, and the upper looper hooks the first thread only on the first needle while moving from the inside of the fabric edge side to the outside of the fabric edge side. When moving backward, the first needle passes through the fabric while holding the first thread and the second thread, and continues to descend. The second needle continues to move downward as it passes through the cloth while holding the third thread without the first thread being hooked, and the lower looper is connected to the first needle and the third thread. While descending, the second needle retreats from the outside of the cloth edge side to the inside of the cloth edge side, and when the first needle and the second needle descend, the upper looper moves back toward the inside of the cloth edge side. The lower looper moves backward from the inside of the cloth edge side toward the outside of the cloth edge side while hooking the first thread only on the needle, and the lower looper retreats from the outside of the cloth edge side toward the inside of the cloth edge side. , while passing through the second gap and the third gap, the fourth thread held at the tip of the lower looper passes through the inside of the second gap and the third gap, and While the first needle and the second needle are passing through the cloth and descending, the second thread and the third thread are pulled, thereby creating a gap between the second gap and the third gap. contracts, and the lower looper retreats from the outside of the cloth edge side toward the inside of the cloth edge side, thereby bending the held fourth thread, and due to the bending, a fifth gap is created, and the The upper looper retreats from the inside of the cloth edge side to the outside of the cloth edge side, and passes through the fifth gap while hooking the first yarn held at the tip of the upper looper to the inside of the fifth gap, When the first needle and the second needle start rising from the bottom dead center again, the lower looper moves forward again from the inside of the fabric edge side to the outside of the fabric edge side, and The fifth gap contracts when the thread is pulled, and the upper looper further retreats from the inside of the cloth edge side toward the outside of the cloth edge side, so that the first yarn is pulled. By doing so, an overlock stitch is formed in which the overlock width on the front side is at the position of the first needle and the overlock width on the back side is at the position of the second needle, while the seam allowance on the front side is at the position of the second needle. The lockstitch is configured to simultaneously perform lockstitching at a second needle position , the surface stitching is formed by the first thread, and the lockstitching is performed using the third thread at a position spaced apart from the surface stitching. The overlock on the back surface is formed by the fourth thread, and the second thread is sewn at the position of the first needle .

請求項２に係る発明は、表面のオーバーロック縫いのかがり幅が５～６ｍｍ、裏面のオーバーロック縫いのかがり幅が９ｍｍであることを特徴とする。 The invention according to claim 2 is characterized in that the overlock width of the overlock stitch on the front side is 5 to 6 mm, and the overlock width of the overlock stitch on the back side is 9 mm.

本発明によれば、縫製作業を工程に短縮することができ、解れにくい縫製が可能となる。 According to the present invention, it is possible to shorten the sewing work to a single process, and it is possible to perform sewing that is difficult to unravel.

本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置の作動を拡大して示す概略図である。1 is an enlarged schematic diagram illustrating the operation of a sewing device according to an embodiment of the present invention. 本発明の実施形態に係る縫製装置によって施された縫い目の状態を示す概略図である。FIG. 3 is a schematic diagram showing the state of stitches made by the sewing device according to the embodiment of the present invention.

以下、本発明の実施形態について、図を用いて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail using the drawings.

図１に示すように、布２が進行する縫製方向に沿う布縁側の外側（以降、「手前側」と称す。）に配置され、縫製方向に対して直交する方向を往復移動する上ルーパー１０と、布縁側の内側（以降、「奥側」と称す。）に配置され、縫製方向に対して直交する方向を往復移動する下ルーパー１１と、縫製方向に対して水平面内で縫製方向と略直交する方向に並列に配置され、上下方向に往復移動する２本の針を有し、２本の針の内、一方が布縁側に配置された第一の針１２と、他方が第一の針１２より奥側に配置された第二の針１３を有し、
上ルーパー１０の先端付近で保持される糸を第一の糸２０、第一の針１２に保持される糸を第二の糸２１、第二の針１３に保持される糸を第三の糸２２、下ルーパー１１の先端付近で保持される糸を第四の糸２３が設けられている。 As shown in FIG. 1, an upper looper 10 is disposed on the outside of the cloth edge side (hereinafter referred to as the "front side") along the sewing direction in which the cloth 2 advances, and reciprocates in a direction perpendicular to the sewing direction. , a lower looper 11 that is disposed on the inside of the fabric edge side (hereinafter referred to as the "back side") and moves back and forth in a direction perpendicular to the sewing direction; It has two needles that are arranged in parallel in orthogonal directions and move back and forth in the vertical direction, and one of the two needles is the first needle 12 that is arranged on the fabric edge side, and the other is the first needle 12 that is arranged on the fabric edge side. It has a second needle 13 located further back than the needle 12,
The thread held near the tip of the upper looper 10 is called the first thread 20, the thread held by the first needle 12 is called the second thread 21, and the thread held by the second needle 13 is called the third thread. 22, a fourth thread 23 is provided that is held near the tip of the lower looper 11.

以下に、本発明の縫い目が形成されるまでの各部品の動作について図１乃至図１０を用いて説明する。 Below, the operation of each component until the seam of the present invention is formed will be explained using FIGS. 1 to 10.

図１に示す状態から、上ルーパー１０が上ルーパー１０の先端付近で第一の糸２０を保持した状態で手前側から奥側に向かって移動する（以降、上ルーパー１０が手前側から奥側に向かって移動することを「前進」と称する。）。 From the state shown in FIG. 1, the upper looper 10 moves from the front side to the back side while holding the first thread 20 near the tip of the upper looper 10 (from now on, the upper looper 10 moves from the front side to the back side). (Moving toward the target is called ``forward''.)

その後、図２に示すように、上ルーパー１０が、前進することで上ルーパー１０の本体と上ルーパー１０の先端部から出る第一の糸２０が撓むことにより生じた第一の糸２０と上ルーパー１０との第一の隙間３０の内側を第一の針１２が第二の糸２１を保持しながら降下し、第二の針１３は、第一の隙間３０の外側を降下する。 Thereafter, as shown in FIG. 2, as the upper looper 10 moves forward, the main body of the upper looper 10 and the first thread 20 coming out from the tip of the upper looper 10 are bent, and the first thread 20 is bent. The first needle 12 descends inside the first gap 30 with the upper looper 10 while holding the second thread 21, and the second needle 13 descends outside the first gap 30.

その後、図３に示すように、上ルーパー１０は、第一の針１２に第一の糸２０を引掛けながら奥側から手前側に移動し（以降、上ルーパー１０が奥側から手前側に移動することを、後退と称する。）、第一の針１２は、図３に示す第一の引掛箇所４０のように第一の糸２０を引掛かけられた状態で、第二の糸２１を保持しながら布２を貫通し下死点まで降下する。一方、第二の針１３は、第一の隙間３０の外側を下降する為、第一の糸２０を引掛けられることなく、第三の糸２２を保持しながら布２を貫通し下死点まで降下する。 Thereafter, as shown in FIG. 3, the upper looper 10 moves from the back side to the front side while hooking the first thread 20 on the first needle 12 (from now on, the upper looper 10 moves from the back side to the front side). This movement is called retraction), and the first needle 12 is hooked to the first thread 20 as shown in the first hooking point 40 shown in FIG. While holding it, it penetrates the cloth 2 and descends to the bottom dead center. On the other hand, since the second needle 13 descends outside the first gap 30, it penetrates the cloth 2 while holding the third thread 22 without being caught by the first thread 20, and reaches the bottom dead center. descend to

その後、図４に示すように、第一の針１２と第二の針１３が、下死点から上昇し始めることで第二の糸２１と第三の糸２２が撓み、この撓みにより生じる第一の針１２と第二の糸２１との第二の隙間３１と、第二の針１３と第三の糸２２との第三の隙間３２の内側を下ルーパー１１が奥側から手前側に向かって下ルーパー１１の先端付近で保持された第四の糸２３を引っ掛けながら移動する（以降、下ルーパー１１が、奥側から手前側に向かって移動することを、「前進」と称する。）。 Thereafter, as shown in FIG. 4, the first needle 12 and the second needle 13 begin to rise from the bottom dead center, causing the second thread 21 and the third thread 22 to bend, and the second needle caused by this bending to occur. The lower looper 11 moves inside the second gap 31 between the first needle 12 and the second thread 21 and the third gap 32 between the second needle 13 and the third thread 22 from the back side to the front side. The lower looper 11 moves toward the lower looper 11 while hooking the fourth thread 23 held near the tip (hereinafter, moving the lower looper 11 from the back side toward the front side is referred to as "forward movement"). .

その後、図５に示すように、下ルーパー１１が、更に第二の糸２１と第三の糸２２を引掛けながら前進すると、上ルーパー１０も前進し始め、図５に示す第四の隙間３３の内側を、上ルーパー１０が、下ルーパー１１の先端付近で保持された第四の糸２３の下側から第四の糸２３を掬い上げるように上ルーパー１０の上に引掛けながら前進する。また、２本の針が上昇して布２を貫通すると、上ルーパー１０が前進し始め、布２が縫製方向と反対の方向に所定の距離Ｌを移動する。 Thereafter, as shown in FIG. 5, when the lower looper 11 moves forward while further hooking the second thread 21 and the third thread 22, the upper looper 10 also begins to move forward, and the fourth gap 33 shown in FIG. The upper looper 10 moves forward while scooping up the fourth thread 23 from below the fourth thread 23 held near the tip of the lower looper 11 and hooking it onto the upper looper 10. Further, when the two needles rise and pass through the cloth 2, the upper looper 10 begins to move forward, and the cloth 2 moves a predetermined distance L in the opposite direction to the sewing direction.

その後、図６に示すように、更に上ルーパー１０が前進すると、第四の糸２３が上ルーパー１０の上から第一の糸２０の上へ引掛けながら前進する。 Thereafter, as shown in FIG. 6, when the upper looper 10 moves further forward, the fourth thread 23 moves forward while being hooked onto the first thread 20 from above the upper looper 10.

その後、上ルーパー１０は、更に前進すると図２のように、第一の糸２０と上ルーパー１０との第一の隙間３０が生じさせながら前進し、下ルーパー１１は、第一の隙間３０が生じたタイミングで後退を始める。 After that, when the upper looper 10 moves further forward, it moves forward while creating a first gap 30 between the first yarn 20 and the upper looper 10, as shown in FIG. Start retreating at the right moment.

その後、図７に示すように、第一の針１２が降下すると上ルーパー１０は、第一の針１２に第一の糸２０を引掛けながら後退する。この際、下ルーパー１１は、下ルーパー１１に引掛かけていた第二の糸２１と第三の糸２２を外すと共に、下ルーパー１１の先端付近に保持された第四の糸２３を第二の隙間３１と第三の隙間３２に引掛けながら後退する。 Thereafter, as shown in FIG. 7, when the first needle 12 descends, the upper looper 10 retreats while hooking the first thread 20 onto the first needle 12. At this time, the lower looper 11 removes the second thread 21 and the third thread 22 that were hooked on the lower looper 11, and also removes the fourth thread 23 held near the tip of the lower looper 11 from the second thread 22. It retreats while hooking on the gap 31 and the third gap 32.

その後、図８に示すように、下ルーパー１１から外された第二の糸２１と第三の糸２２は、第一の針１２及び第二の針１３が布２を貫通しながら降下することで第二の隙間３１と第三の隙間３２の内側に引掛けられた第四の糸２３と共に上に引張られ、上ルーパー１０は、図８に示す第五の隙間３４の内側を通りながら引掛かけていた第四の糸２３を外すと共に、第四の糸２３の下側に第一の糸２０が引掛けながら後退する。 Thereafter, as shown in FIG. 8, the second thread 21 and the third thread 22 removed from the lower looper 11 descend while the first needle 12 and the second needle 13 penetrate the cloth 2. The upper looper 10 is pulled upward together with the fourth thread 23 hooked inside the second gap 31 and the third gap 32, and the upper looper 10 is hooked while passing inside the fifth gap 34 shown in FIG. The fourth thread 23 that has been tied is removed, and the first thread 20 is hooked on the underside of the fourth thread 23 while retreating.

その後、図９に示すように、第一の針１２及び第二の針１３が降下することで生じた第二の隙間３１と第三の隙間３２の内側を下ルーパー１１が引っ掛けながら前進し、下ルーパー１１が前進することで第四の糸２３が引張られることにより図８で示した第五の隙間３４が無くなり、これと同時に上ルーパーが後退することで第一の糸２０が引張られる。 Thereafter, as shown in FIG. 9, the lower looper 11 moves forward while catching inside the second gap 31 and third gap 32 created by the descent of the first needle 12 and the second needle 13, As the lower looper 11 moves forward, the fourth thread 23 is pulled, thereby eliminating the fifth gap 34 shown in FIG. 8, and at the same time, as the upper looper moves backward, the first thread 20 is pulled.

上述で説明した工程を繰り返すことで図１０に示すように、表面のオーバーロック縫いは、第一の糸２０のかかり幅が第一の針１２の縫い代（Ａ）で形成され、その外側で第三の糸２２で本縫いが、第二の針１３の縫い代（Ｂ）で形成される。裏面のオーバーロック縫いは、第四の糸２３のかがり幅が第二の針１３の縫い代（Ａ）で形成されるオーバーロック縫いを形成する。 By repeating the process described above, as shown in FIG. 10, surface overlock stitching is performed such that the width of the first thread 20 is formed by the seam allowance (A) of the first needle 12, and the width of the first thread 20 is formed by the seam allowance (A) of the first needle 12. A lock stitch is formed using the third thread 22 and the seam allowance (B) of the second needle 13. The overlock stitch on the back side forms an overlock stitch in which the overlocking width of the fourth thread 23 is formed by the seam allowance (A) of the second needle 13.

なお、表面のオーバーロック縫いと、裏面のオーバーロック縫いの縫い代は、夫々５～６ｍｍ、９ｍｍと規定してもよい。 Note that the seam allowances for the overlock stitch on the front side and the overlock stitch on the back side may be defined as 5 to 6 mm and 9 mm, respectively.

本発明によれば、２本の針の内、第一の針１２のみに第一の糸を引っ掛けるようにすることで、１工程でオーバーロック縫いと本縫いを同時に行うことができるとともに、表面はオーバーロック縫いと本縫いが独立して縫製されている為、本縫い又はオーバーロック縫いのどちらか一方が解れても、もう一方が独立して縫製されている為、連鎖的に解れる危険性がなく解れにくくなる。 According to the present invention, by hooking the first thread only on the first needle 12 of the two needles, overlock stitching and lock stitching can be performed simultaneously in one step, and the Since the overlock stitch and lock stitch are sewn independently, even if either the lock stitch or the overlock stitch unravels, the other one is sewn independently, so there is a risk of it coming unraveled. It has no character and becomes difficult to unravel.

１オーバーロックミシン
２布
１０上ルーパー
１１下ルーパー
１２第一の針
１３第二の針
２０第一の糸
２１第二の糸
２２第三の糸
２３第四の糸
３０第一の隙間
３１第二の隙間
３２第三の隙間
３３第四の隙間
３４第五の隙間
４０第一の引掛箇所
1 Overlock sewing machine 2 Cloth 10 Upper looper 11 Lower looper 12 First needle 13 Second needle 20 First thread 21 Second thread 22 Third thread 23 Fourth thread 30 First gap 31 Second Gap 32 Third Gap 33 Fourth Gap 34 Fifth Gap 40 First Hook Point

Claims

an upper looper that is disposed on the outside of the cloth edge side along the sewing direction in which the cloth progresses and reciprocates in a direction perpendicular to the sewing direction;
a lower looper disposed inside the edge side of the cloth and reciprocating in a direction perpendicular to the sewing direction;
It has two needles that are arranged in parallel in a direction substantially perpendicular to the sewing direction in a horizontal plane with respect to the sewing direction and move back and forth in the vertical direction, and one of the two needles is on the edge side of the cloth. a first needle disposed on the edge of the cloth, and a second needle disposed on the inside of the fabric edge side from the first needle;
A first thread held near the tip of the upper looper, a second thread held by the first needle, a third thread held by the second needle, and a third thread held by the lower looper. and a fourth thread held near the tip;
This is caused by bending of the main body of the upper looper and the first thread coming out of the tip of the upper looper when the upper looper advances from the outside of the cloth edge side to the inside of the cloth edge side. The first needle descends inside the first gap between the first thread and the upper looper while holding the second thread, and the second needle moves inside the first gap between the first thread and the upper looper. Descend on the outside ,
When the upper looper moves backward from the inside of the cloth edge side to the outside of the cloth edge side while hooking the first thread only on the first needle, the first needle In a state where the needle is hooked on the first thread, it passes through the cloth and descends to the bottom dead center while holding the second thread, and the second needle is not hooked on the first thread. In this state, while holding the third thread, it penetrates the cloth and descends to the bottom dead center,
When the upper looper further retreats from the inside of the cloth edge side to the outside of the cloth edge side, when the first needle and the second needle begin to rise from the bottom dead center, the The second thread and the third thread are deflected, and the deflection creates a second gap between the first needle and the second thread and a gap between the second needle and the third thread. A third gap is generated, and the lower looper advances from the inside of the cloth edge side to the outside of the cloth edge side, and the tip of the lower looper moves inside the second gap and the third gap. the fourth thread held by is inserted;
The lower looper is inserted into the second gap and the third gap, and when moving further from the inside of the fabric edge side to the outside of the fabric edge side, the lower looper connects with the first needle. The second needle continues to rise further and penetrates the fabric, and the upper looper starts advancing from the outside of the fabric edge side to the inside of the fabric edge side, and connects the lower looper and the fourth thread. the cloth is inserted into a fourth gap formed between the cloth and the cloth is moved a predetermined distance in a direction opposite to the sewing direction
When the upper looper further advances from the outside of the cloth edge side to the inside of the cloth edge side, the first needle holds the second thread inside the first gap. the second needle descends outside the first gap;
When the upper looper moves backward from the inside of the cloth edge side to the outside of the cloth edge side while hooking the first thread only on the first needle, the first needle In a state where the first thread is hooked, the needle passes through the cloth while holding the second thread and continues to descend, and when the first thread is not hooked, the second needle continues to move downward. , the lower looper passes through the fabric while holding the third thread and continues to descend, and the lower looper moves from the outside of the fabric edge side to the fabric edge side while the first needle and the second needle are descending. retreat inward,
When the first needle and the second needle descend, the upper looper hooks the first thread only on the first needle and moves from the inside of the cloth edge side to the outside of the cloth edge side. The lower looper moves backward from the outside of the cloth edge side to the inside of the cloth edge side, passes through the second gap and the third gap, and is held at the tip of the lower looper. the fourth thread passes through the second gap and the third gap,
While the first needle and the second needle are passing through the cloth and descending, the second thread and the third thread are pulled, so that the second gap and the third thread are pulled. The gap contracts, and the lower looper retreats from the outside of the cloth edge side toward the inside of the cloth edge side, thereby bending the held fourth thread, and due to the bending, a fifth gap is created, The upper looper moves backward from the inside of the cloth edge side to the outside of the cloth edge side, and passes through the fifth gap while hooking the first yarn held at the tip of the upper looper to the inside of the fifth gap. ,
When the first needle and the second needle start rising from the bottom dead center again, the lower looper moves forward again from the inside of the fabric edge side to the outside of the fabric edge side, and The fifth gap contracts when the thread is pulled, and the upper looper further retreats from the inside of the cloth edge side toward the outside of the cloth edge side, so that the first yarn is pulled. By becoming
While forming an overlock stitch in which the overlock width on the front side is at the position of the first needle and the overlock width on the back side is at the position of the second needle, the seam allowance on the front side is at the position of the second needle. It is configured to perform sewing at the same time ,
The front stitch is formed with the first thread, a lock stitch is formed with the third thread at a position apart from the front stitch, and the back stitch is formed with the fourth thread. . A sewing device, characterized in that the second thread is configured to be sewn at the position of the first needle .

The sewing device according to claim 1, wherein the overlock width of the front side overlock stitch is 5 to 6 mm, and the overlock width of the back side overlock stitch is 9 mm.