JP2008048828A

JP2008048828A - Needle threader for sewing machine

Info

Publication number: JP2008048828A
Application number: JP2006226851A
Authority: JP
Inventors: Takanao Miyoshi; 貴直三好
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2006-08-23
Filing date: 2006-08-23
Publication date: 2008-03-06

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly thread a needle without allowing a thread to be caught by a threading guide. <P>SOLUTION: This needle threader 1 for sewing machines is provided with a threading shaft 2, a threading holder 3, two threading guides 5 and 6, and a threading hook 7; and threads the needle 4 by rotating the threading shaft to move the threading holder, passing the threading hook into a needle hole 41 to lay the thread across the two threading guides, inversely rotating the threading shaft and retreating the threading hook from the needle hole with the thread locked thereto. The respective threading guides have head parts 51 and 61 provided at the upper parts and jaw parts 52 and 62 spaced downward from the head parts and are so formed as to lay the thread across a clearance formed between the lower ends of the head parts and the upper ends of the jaw parts; and the upper end face of the jaw part in one threading guide is formed with a slope face 52a sloping downward as its heading from the base end side toward the tip side of the thread locking part of the threading hook. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、針穴に糸を通すミシンの糸通し装置に関する。 The present invention relates to a threading device for a sewing machine that passes a thread through a needle hole.

従来、針の針穴に糸を通すというユーザにとって煩わしい作業から解放するため、ユーザの簡単な操作により針の針穴に容易に糸を通すことができるミシンの糸通し装置がある（例えば、特許文献１参照。）。
図５に示すように、糸通し装置１００を用いて針の針穴に糸を通す際には、駆動源に連結された糸通し軸１０１を軸線回りに回転させることにより、糸通し軸１０１に設けられた糸通しホルダ１０８に設けられた二つの糸通しガイド１０２，１０３を移動させ、二つの糸通しガイド１０２，１０３の間に針１０４を入り込ませる。このとき、二つの糸通しガイド１０２，１０３の間には、針１０４の針穴１０４ａに糸を通す糸通しフック１０５が設けられており、二つの糸通しガイド１０２，１０３の間に針１０４を入り込ませた際には、この糸通しフック１０５が針穴１０４ａを通過した状態となっている。そして、二つの糸通しガイド１０２，１０３にそれぞれ形成された切り欠き１０６，１０７に糸を架け渡し、再度糸通し軸１０１を軸線回りに逆回転させて二つの糸通しガイド１０２，１０３を移動させると、糸通しフック１０５が切り欠き１０６，１０７に架け渡された糸を捕捉した状態で針穴１０４ａから脱出し、これによって針穴１０４ａに糸が通される。
特開平９−１３１４８５号公報 2. Description of the Related Art Conventionally, there is a threading device for a sewing machine that allows a thread to be easily passed through a needle hole of a needle by a simple operation of the user in order to release the troublesome work for the user of threading the needle through the needle hole (for example, a patent Reference 1).
As shown in FIG. 5, when threading the needle hole of the needle using the threading device 100, the threading shaft 101 connected to the drive source is rotated around the axis, thereby causing the threading shaft 101 to move. The two threading guides 102 and 103 provided in the provided threading holder 108 are moved, and the needle 104 is inserted between the two threading guides 102 and 103. At this time, a threading hook 105 for threading the needle hole 104a of the needle 104 is provided between the two threading guides 102 and 103, and the needle 104 is interposed between the two threading guides 102 and 103. When inserted, the threading hook 105 passes through the needle hole 104a. Then, the thread is bridged between the notches 106 and 107 formed in the two threading guides 102 and 103, respectively, and the threading shaft 101 is again rotated around the axis to move the two threading guides 102 and 103. Then, the threading hook 105 escapes from the needle hole 104a in a state where the thread stretched over the notches 106 and 107 is captured, and the thread is passed through the needle hole 104a.
JP-A-9-131485

ところで、糸通し装置１００は、縫製を行う前の糸通しに用いられ、針１０４が上下動して縫製を行っている最中には必要がない。そのため、糸通しを行った後、縫製を始める前には糸通しガイド１０２，１０３を上方に移動させて待機させている。
しかし、糸通しの際、針穴１０４ａに糸が通ったものの、図６〜図８に示すように、糸通しガイド１０２に形成された切り欠き１０６に糸Ｔが引っ掛かる場合があり、このような状態で糸通しガイド１０２が上方に移動すると、ユーザが糸通しガイド１０２に引っ掛かった糸Ｔを取り外す作業が必要となる。ここで、糸通しガイド１０２に引っ掛かった糸Ｔを無理に引っ張ると、糸通しガイド１０２を損傷してしまうことがあるため、針穴１０４ａから糸Ｔを取り外して再度糸通しを行う必要があった。 By the way, the threading device 100 is used for threading before sewing, and is not necessary while the needle 104 is moving up and down to perform sewing. For this reason, after threading, before threading is started, the threading guides 102 and 103 are moved upward to stand by.
However, during threading, although the thread has passed through the needle hole 104a, the thread T may be caught in the notch 106 formed in the threading guide 102 as shown in FIGS. If the threading guide 102 moves upward in this state, the user needs to remove the thread T caught on the threading guide 102. Here, if the thread T caught on the threading guide 102 is forcibly pulled, the threading guide 102 may be damaged. Therefore, it is necessary to remove the thread T from the needle hole 104a and perform threading again. .

そこで、本発明は、上記課題を解決するためになされたものであり、糸通しガイドに糸を引っ掛けることなく、スムーズに糸通しを行うことができるミシンの糸通し装置を提供することを目的とする。 Accordingly, the present invention has been made to solve the above-described problem, and an object of the present invention is to provide a threading device for a sewing machine that can smoothly thread the threading guide without hooking the thread onto the threading guide. To do.

請求項１に記載の発明は、ミシンの上下方向の軸線に沿わせて設けられ、軸線回りに回転する糸通し軸と、前記糸通し軸に設けられ、前記糸通し軸の回転とともに略水平方向に沿って移動する糸通しホルダと、前記糸通しホルダに設けられ、針の針穴に通す糸が架け渡される二つの糸通しガイドと、前記糸通しホルダに設けられ、前記針穴を通過可能に形成されるとともに前記二つの糸通しガイドに挟まれるように配置され、前記二つの糸通しガイドに架け渡された糸を係止する糸通しフックと、を備え、前記糸通し軸を回転させて前記糸通しホルダを移動させ、前記糸通しフックを前記針穴に通過させて前記二つの糸通しガイドに糸を架け渡し、前記糸通し軸を逆方向に回転させることにより、前記糸通しフックが糸を係止した状態で前記針穴から退避することにより針に糸を通すミシンの糸通し装置において、各糸通しガイドは、上方に設けられた頭部と前記頭部から下方に隙間をあけて設けられた顎部とを有し、前記頭部の下端と前記顎部の上端との間に形成される隙間に糸が架け渡されるように構成され、一方の糸通しガイドにおける顎部の上端面には、前記糸通しフックの糸係止部よりも基端側から先端側に向かうにつれて下方に傾斜する傾斜面が形成されていることを特徴とする。 The invention according to claim 1 is provided along the vertical axis of the sewing machine, and is provided in the threading shaft that rotates around the axis, and is provided in the threading shaft, and substantially in the horizontal direction along with the rotation of the threading shaft. A threading holder that moves along the needle thread, two threading guides that are provided in the threading holder and over which the thread that passes through the needle hole of the needle is bridged, and that is provided in the threading holder and can pass through the needle hole And a threading hook that is disposed so as to be sandwiched between the two threading guides and engages the thread spanned between the two threading guides, and rotates the threading shaft. Moving the threading holder, passing the threading hook through the needle hole, bridging the thread between the two threading guides, and rotating the threading shaft in the reverse direction, With the thread locked In a threading device for a sewing machine in which a thread is passed through a needle by retreating from a hole, each threading guide has a head provided above and a jaw provided with a gap downward from the head. The thread is hooked on the upper end surface of the jaw part of one threading guide, and the thread is hooked on a gap formed between the lower end of the head and the upper end of the jaw part. An inclined surface that is inclined downward as it goes from the proximal end side to the distal end side with respect to the thread locking portion is formed.

請求項１に記載の発明によれば、一方の糸通しガイドにおける顎部の上端面に、糸通しフックの糸係止部よりも基端側から先端側に向かうにつれて下方に傾斜する傾斜面を形成することで、糸通しフックが針穴から退避して針に糸を通した後は、その傾斜面に沿って糸が移動し、糸は顎部に引っ掛かることなくスムーズに外れる。
よって、ユーザに手間を掛けさせないスムーズな糸通しを実現することができる。 According to the first aspect of the present invention, the inclined surface that is inclined downward toward the distal end side from the proximal end side to the distal end side from the thread locking portion of the threading hook is formed on the upper end surface of the jaw portion of one threading guide. By forming, after the threading hook is retracted from the needle hole and threaded through the needle, the thread moves along the inclined surface, and the thread is smoothly removed without being caught by the jaw.
Therefore, it is possible to realize a smooth threading that does not require the user to take time and effort.

請求項２に記載の発明は、請求項１に記載のミシンにおいて、前記傾斜面は、前記糸通し軸を回転する際にその回転中心から見て内側に位置する糸通しガイドの顎部に形成されていることを特徴とする。 According to a second aspect of the present invention, in the sewing machine according to the first aspect, the inclined surface is formed on a jaw portion of a threading guide that is positioned inward when viewed from the rotation center when the threading shaft is rotated. It is characterized by being.

請求項２に記載の発明によれば、糸通しをする際に糸が引っ掛かるのが糸通し軸を回転する際にその回転中心から見て内側に位置する糸通しガイドの顎部であるため、その顎部の上端を傾斜面とすることでスムーズな糸通しを実現することができる。 According to the invention described in claim 2, since the thread is caught when threading is the jaw part of the threading guide located on the inner side when viewed from the rotation center when rotating the threading shaft, Smooth threading can be realized by making the upper end of the jaw part an inclined surface.

請求項３に記載の発明は、請求項１又は２に記載のミシンにおいて、前記傾斜面が形成された一方の糸通しガイドにおける顎部は、前記糸通しフックの延在方向に沿わせて延びるように形成されていることを特徴とする。 According to a third aspect of the present invention, in the sewing machine according to the first or second aspect, the jaw portion of the one threading guide in which the inclined surface is formed extends along the extending direction of the threading hook. It is formed as follows.

請求項３に記載の発明によれば、傾斜面が形成された一方の糸通しガイドにおける顎部を糸通しフックの延在方向に沿わせて延びるように形成することで、顎部への糸に引っ掛かりの防止効果を向上させることができる。 According to the invention described in claim 3, by forming the jaw portion of one of the threading guides having the inclined surface so as to extend along the extending direction of the threading hook, the yarn to the jaw portion is formed. It is possible to improve the effect of preventing catching.

以下、図面を参照して、本発明に係るミシンの糸通し装置の最良の形態について詳細に説明する。
＜ミシンの糸通し装置の構成＞
図１に示すように、ミシンの糸通し装置１は、軸線回りに回転可能とされた糸通し軸２と、糸通し軸２に設けられ、糸通し軸２の回転とともに略水平方向に沿って移動する糸通しホルダ３と、糸通しホルダ３に設けられ、針４の針穴４１に通す糸が架け渡される二つの糸通しガイド５，６と、糸通しホルダ３に設けられ、針穴４１を通過可能に形成されるとともに二つの糸通しガイド５，６に挟まれるように配置され、二つの糸通しガイド５，６に架け渡された糸を係止する糸通しフック７と、を備えている。 Hereinafter, the best mode of a threading device for a sewing machine according to the present invention will be described in detail with reference to the drawings.
<Configuration of sewing machine threading device>
As shown in FIG. 1, a threading device 1 for a sewing machine is provided on a threading shaft 2 that is rotatable around an axis, and the threading shaft 2, and substantially along the horizontal direction as the threading shaft 2 rotates. A moving threading holder 3, two threading guides 5, 6 provided in the threading holder 3 and spanning a thread passing through the needle hole 41 of the needle 4, and provided in the threading holder 3, the needle hole 41 A threading hook 7 that is formed so as to be able to pass through and is disposed between the two threading guides 5 and 6 and that locks the thread spanned between the two threading guides 5 and 6. ing.

糸通し軸２は、ミシンの上下方向に沿って延びる棒状に形成され、軸線を回転中心として時計回り及び反時計回りに回転可能に構成されている。
糸通し軸２の下端には、糸通しホルダ３が取り付けられ、固定されている。すなわち、糸通し軸２の回転とともに、糸通しホルダ３も糸通し軸２の軸線を回転中心として回転移動することになる。糸通しホルダ３には、板状に形成された二つの糸通しガイド５，６が固定されており、その表裏面がミシンの上下方向、すなわち、糸通し軸２の軸線方向に沿うように配置されている。
二つの糸通しガイド５，６は、略水平方向、すなわち、糸通し軸２の軸線方向に略直交する方向に延びるように形成され、二つの糸通しガイド５，６の先端には、頭部５１，６１及び顎部５２，６２が設けられている。なお、二つの糸通しガイド５，６と頭部５１，６１及び顎部５２，６２は、一体に形成されていてもよいし、それぞれの頭部５１，６１及び顎部５２，６２を二つの糸通しガイド５，６に取り付けて固定するようにしてもよい。 The threading shaft 2 is formed in a rod shape extending along the vertical direction of the sewing machine, and is configured to be able to rotate clockwise and counterclockwise about the axis.
A threading holder 3 is attached and fixed to the lower end of the threading shaft 2. That is, as the threading shaft 2 rotates, the threading holder 3 also rotates around the axis of the threading shaft 2 as a rotation center. Two threading guides 5, 6 formed in a plate shape are fixed to the threading holder 3, and the front and back surfaces thereof are arranged in the vertical direction of the sewing machine, that is, along the axial direction of the threading shaft 2. Has been.
The two threading guides 5 and 6 are formed so as to extend in a substantially horizontal direction, that is, in a direction substantially orthogonal to the axial direction of the threading shaft 2. 51, 61 and jaws 52, 62 are provided. The two threading guides 5 and 6 and the heads 51 and 61 and the jaws 52 and 62 may be formed integrally, or each of the heads 51 and 61 and the jaws 52 and 62 may be formed as two. It may be attached to the threading guides 5 and 6 and fixed.

糸通しガイド５，６は、板状に形成され、その表裏面がミシンの上下方向、すなわち、糸通し軸２の軸線方向に沿うように、かつ、略水平方向、すなわち、糸通し軸２の軸線方向に略直交する方向に延びるように形成され、配置されている。糸通しガイド５，６は、互いに近接して設けられ、糸通しフック７を挟み込んで対向する位置に配置されている。
糸通しガイド５，６は、上方に設けられた頭部５１，６１と、頭部５１，６１から下方に隙間をあけて設けられた顎部５２，６２とを有している。これらは、先端側から基端側に向かって形成された切り欠き５３，６３によって区切られており、頭部５１，６１の下端と顎部５２，６２の上端との間に形成される隙間、すなわち、切り欠き５３，６３に糸が架け渡されるように構成されている。なお、切り欠き５３，６３は、糸を略水平に架け渡すことができるように同じ高さに形成されている。 The threading guides 5 and 6 are formed in a plate shape, and the front and back surfaces thereof are along the vertical direction of the sewing machine, that is, along the axial direction of the threading shaft 2, and in the substantially horizontal direction, that is, the threading shaft 2. It is formed and arranged so as to extend in a direction substantially orthogonal to the axial direction. The threading guides 5 and 6 are provided close to each other, and are arranged at positions facing each other with the threading hook 7 interposed therebetween.
The threading guides 5 and 6 have heads 51 and 61 provided above, and jaws 52 and 62 provided with a gap downward from the heads 51 and 61. These are delimited by notches 53 and 63 formed from the distal end side toward the proximal end side, and a gap formed between the lower ends of the head portions 51 and 61 and the upper ends of the jaw portions 52 and 62, That is, the thread is bridged between the notches 53 and 63. The notches 53 and 63 are formed at the same height so that the thread can be bridged substantially horizontally.

頭部５１，６１及び顎部５２，６２は、糸通しガイド５，６の回転移動方向に略沿った方向に延びるように湾曲形成されている。
さらに、頭部５１の先端は、糸通し軸２の回転中心側に近づくように湾曲形成され、頭部６１の先端は、糸通し軸２の回転中心側から遠ざかるように湾曲形成されている。すなわち、頭部５１と頭部６１は、先端が互いに遠ざかる方向に延びるように形成されている。
また、頭部５１，６１の下端面は、先端に向かうにつれて上方に緩やかに傾斜する傾斜面５１ａ，６１ａが形成されている。 The head portions 51 and 61 and the jaw portions 52 and 62 are curved so as to extend in a direction substantially along the rotational movement direction of the threading guides 5 and 6.
Further, the tip of the head 51 is curved so as to approach the rotation center side of the threading shaft 2, and the tip of the head 61 is curved so as to move away from the rotation center side of the threading shaft 2. That is, the head 51 and the head 61 are formed so that the tips extend in a direction away from each other.
Further, the lower end surfaces of the head portions 51 and 61 are formed with inclined surfaces 51a and 61a that gradually incline upward toward the tip.

糸通し軸２を回転する際にその回転中心から見て内側に位置する顎部５２は、先端が湾曲形成されることなく、糸通しフック７の延在方向に沿わせて延びるように形成されている。また、顎部５２は、その上端面に糸通しフック７の糸係止部７１よりも糸通しガイド５の基端側から先端側に向かうにつれて下方に傾斜する傾斜面５２ａが形成されている。
顎部６２は、糸通し軸２の回転中心側から遠ざかるように湾曲形成されている。また、顎部６２の上端面は、先端に向かうにつれて下方に緩やかに傾斜する傾斜面６２ａが形成されている。 When the threading shaft 2 is rotated, the jaw 52 positioned on the inner side when viewed from the center of rotation is formed so as to extend along the extending direction of the threading hook 7 without the tip being curved. ing. Further, the jaw portion 52 is formed with an inclined surface 52 a that is inclined downwardly from the proximal end side of the threading guide 5 toward the distal end side with respect to the upper end surface thereof rather than the thread locking portion 71 of the threading hook 7.
The jaw 62 is curved so as to move away from the rotation center side of the threading shaft 2. In addition, the upper end surface of the jaw 62 is formed with an inclined surface 62a that gently inclines downward toward the tip.

ここで、顎部５２の上端面の傾斜面５２ａと顎部６２の上端面の傾斜面６２ａとの違いについて説明すると、図２に示すように、傾斜面５２ａは、糸通しフック７が切り欠き５３，６３に架け渡された糸を係止する糸係止部７１よりも糸通しガイド５の基端側から形成され、傾斜面６２ａは、糸通しフック７が切り欠き５３，６３に架け渡された糸を係止する糸係止部７１よりも糸通しガイド５の先端側から形成されている点で相違する。これは、糸通し軸２を回転する際にその回転中心から見て内側に位置する顎部５２には糸が引っ掛かりやすいため、糸係止部７１付近の頭部５１と顎部５２との間隔を広げて糸を逃がしやすくするためであり、糸通し軸２を回転する際にその回転中心から見て外側に位置する顎部６２には糸が引っ掛かることがほとんどないため、糸通し時における切り欠き６３からの糸の外れ防止を優先するためである。
また、顎部５２の先端は、顎部６２の先端よりも基端側にあり、顎部５２の長さが顎部６２よりも短く形成されている。これも、糸の引っ掛かりを防止するためである。 Here, the difference between the inclined surface 52a at the upper end surface of the jaw 52 and the inclined surface 62a at the upper end surface of the jaw portion 62 will be described. As shown in FIG. It is formed from the base end side of the threading guide 5 with respect to the thread latching portion 71 that latches the thread spanned between 53 and 63, and the inclined surface 62 a spans the threading hook 7 across the notches 53 and 63. This is different in that it is formed from the front end side of the threading guide 5 rather than the thread locking portion 71 for locking the formed thread. This is because when the threading shaft 2 is rotated, the thread 52 is easily caught on the inner side of the jaw 52 as viewed from the center of rotation, and therefore, the distance between the head 51 and the jaw 52 near the thread locking portion 71. This is to make it easier for the thread to escape, and when the threading shaft 2 is rotated, the thread 62 is hardly caught by the jaw 62 positioned outward from the center of rotation. This is because priority is given to preventing the yarn from coming off from the notch 63.
Further, the distal end of the jaw portion 52 is located on the proximal side with respect to the distal end of the jaw portion 62, and the length of the jaw portion 52 is shorter than that of the jaw portion 62. This is also for preventing the yarn from being caught.

糸通しフック７は、糸通しガイド５と糸通しガイド６との間に位置するように、一端が糸通しホルダ３に取り付けられている。糸通しフック７の先端には、糸通しガイド５，６に架け渡された糸を係止する鉤状の糸係止部７１が形成されている。糸通しフック７は、糸係止部７１が切り欠き５３と切り欠き６３とを結ぶ空間上に位置するように設けられており、切り欠き５３，６３に架け渡された糸は糸通しフック７の移動により糸係止部７１に係止されるようになっている。 One end of the threading hook 7 is attached to the threading holder 3 so as to be positioned between the threading guide 5 and the threading guide 6. At the tip of the threading hook 7, a hook-shaped thread locking part 71 is formed to lock the thread stretched over the threading guides 5 and 6. The threading hook 7 is provided so that the thread locking portion 71 is positioned on the space connecting the notch 53 and the notch 63, and the thread spanned between the notches 53, 63 is the threading hook 7. Is locked to the thread locking portion 71.

＜糸通し装置による糸通しの手順＞
次に、糸通し装置１による針４の針穴４１への糸通しの手順について説明する。
針４の針穴４１に糸を通すには、図３に示すように、糸通し軸２を図３における時計回り（Ａ方向）に回転させ、糸通しホルダ３に設けられた糸通しガイド５，６を針４に向けて移動させる。そして、糸通しガイド５，６の間に針４が相対的に進入し、糸通しガイド５，６の間に設けられた糸通しフック７の先端に形成された糸係止部７１は針穴４１を通過する。糸係止部７１が針穴４１を通過した段階で糸通しガイド５，６の移動を停止させ、ユーザにより糸通しガイド５，６の切り欠き５３，６３に糸を架け渡す。このとき、糸通しフック７の糸係止部７１は、架け渡された糸を係止する。
糸係止部７１に糸を係止させた後、糸通し軸２をＡ方向と逆方向（図３における反時計回り）に回転させ、糸通しホルダ３に設けられた糸通しガイド５，６を針４から遠ざかるように移動させる。そして、糸通しガイド５，６の間から針４が相対的に退避し、糸通しガイド５，６の間に設けられた糸通しフック７の先端に形成された糸係止部７１は糸を係止した状態で針穴４１から脱出する。
このような手順により、針４の針穴４１に糸が通される。 <Threading procedure with threading device>
Next, a procedure for threading the needle 4 into the needle hole 41 by the threading device 1 will be described.
In order to pass the thread through the needle hole 41 of the needle 4, as shown in FIG. 3, the threading shaft 2 is rotated clockwise (direction A) in FIG. 3, and the threading guide 5 provided in the threading holder 3. , 6 is moved toward the needle 4. Then, the needle 4 relatively enters between the threading guides 5 and 6, and the thread locking portion 71 formed at the tip of the threading hook 7 provided between the threading guides 5 and 6 has a needle hole. Pass through 41. When the thread locking portion 71 passes through the needle hole 41, the movement of the threading guides 5 and 6 is stopped, and the thread is passed over the notches 53 and 63 of the threading guides 5 and 6 by the user. At this time, the thread locking portion 71 of the threading hook 7 locks the spanned thread.
After the thread is locked in the thread locking portion 71, the threading shaft 2 is rotated in the direction opposite to the direction A (counterclockwise in FIG. 3), and the threading guides 5 and 6 provided in the threading holder 3 are provided. Is moved away from the needle 4. Then, the needle 4 is relatively retracted from between the threading guides 5 and 6, and the thread locking portion 71 formed at the tip of the threading hook 7 provided between the threading guides 5 and 6 It escapes from the needle hole 41 in the locked state.
By such a procedure, the thread is passed through the needle hole 41 of the needle 4.

＜作用効果＞
上記の手順による糸通し作業において、糸係止部７１が糸を係止した状態で針穴４１から脱出した際、回転移動する際の内側に位置する糸通しガイド５の顎部５２に糸が引っ掛かりやすくなるが、顎部５２の上端面に、糸通しフック７の糸係止部７１よりも基端側から先端側に向かうにつれて下方に傾斜する傾斜面５２ａを形成し、さらに、顎部５２の先端が頭部５１よりも短く形成されているので、図４に示すように、頭部５１と顎部５２との間隔が広がり、糸通しフック７の糸係止部７１が針穴４１から退避して針４に糸を通した後は、その傾斜面５２ａに沿って糸が滑り落ちるように移動し、糸は顎部５２に引っ掛かることなくスムーズに外れる。
よって、ユーザに手間を掛けさせないスムーズな糸通しを実現することができる。
また、傾斜面５２ａが形成された糸通しガイド５における顎部５２を糸通しフック７の延在方向に沿わせて延びるように形成することで、顎部５２への糸に引っ掛かりの防止効果を向上させることができる。 <Effect>
In the threading operation according to the above-described procedure, when the thread locking portion 71 is released from the needle hole 41 with the thread locked, the thread is placed on the jaw 52 of the threading guide 5 positioned on the inner side when rotating. Although it becomes easy to be caught, an inclined surface 52 a is formed on the upper end surface of the jaw 52 so as to incline downward from the proximal end side to the distal end side with respect to the thread locking portion 71 of the threading hook 7. 4 is formed shorter than the head 51, the distance between the head 51 and the jaw 52 is widened, and the thread locking portion 71 of the threading hook 7 extends from the needle hole 41 as shown in FIG. 4. After retracting and passing the thread through the needle 4, the thread moves so as to slide down along the inclined surface 52 a, and the thread is smoothly removed without being caught by the jaw 52.
Therefore, it is possible to realize a smooth threading that does not require the user to take time and effort.
Further, by forming the jaw portion 52 of the threading guide 5 in which the inclined surface 52a is formed so as to extend along the extending direction of the threading hook 7, an effect of preventing catching on the thread to the jaw portion 52 is obtained. Can be improved.

なお、本発明は、上記実施形態に限定されるものではない。例えば、糸通しフック７の糸係止部７１よりも基端側から先端側に向かうにつれて下方に傾斜する傾斜面を一方の糸通しガイド５の顎部５２に形成したが、このような傾斜面を他方の糸通しガイド６の顎部６２の上端面に形成してもよい。これにより、糸が顎部６２に引っ掛かっても糸を外しやすくすることができ、糸通し作業をスムーズに行うことができる。
また、糸の引っ掛かりやすい顎部５２に傾斜面５２ａを形成するだけに限らず、糸係止部７１より先端側の顎部５２の先端を切り落として糸係止部７１近傍の顎部５２と頭部５１との間隔を広げるようにしてもよい。もちろん、糸が架け渡せるように切り欠き５３を残しておかなければならないのは当然である。 The present invention is not limited to the above embodiment. For example, an inclined surface inclined downward from the proximal end side to the distal end side with respect to the thread locking portion 71 of the threading hook 7 is formed in the jaw portion 52 of one threading guide 5. May be formed on the upper end surface of the jaw 62 of the other threading guide 6. Thereby, even if the thread is caught on the jaw 62, the thread can be easily removed, and the threading operation can be performed smoothly.
Further, not only the inclined surface 52a is formed on the jaw portion 52 on which the yarn is easily caught, but also the jaw portion 52 and the head in the vicinity of the yarn engagement portion 71 by cutting off the distal end of the jaw portion 52 on the distal end side from the yarn engagement portion 71. You may make it widen the space | interval with the part 51. FIG. Of course, it is natural that the notch 53 must be left so that the thread can be bridged.

ミシンの糸通し装置の斜視図。The perspective view of the threading device of a sewing machine. 糸通しガイドの側面図。The side view of a threading guide. ミシンの糸通し装置の平面図。The top view of the threading device of a sewing machine. 顎部に糸が引っ掛かった際の状態について説明する図。The figure explaining the state at the time of a thread | yarn being hooked on the jaw part. 従来技術におけるミシンの糸通し装置の斜視図。The perspective view of the threading device of the sewing machine in a prior art. 従来技術における顎部に糸が引っ掛かった際の状態について説明する図。The figure explaining the state at the time of a thread | yarn being caught in the jaw part in a prior art. 従来技術における顎部に糸が引っ掛かった際の問題点を説明する図。The figure explaining the problem at the time of a thread | yarn getting caught in the jaw part in a prior art. 従来技術における顎部に糸が引っ掛かった際の問題点を説明する図。The figure explaining the problem at the time of a thread | yarn getting caught in the jaw part in a prior art.

符号の説明Explanation of symbols

１ミシンの糸通し装置
２糸通し軸
３糸通しホルダ
４針
５糸通しガイド
６糸通しガイド
７糸通しフック
４１針穴
５１頭部
５２顎部
５２ａ傾斜面
６１頭部
６２顎部
７１糸係止部 DESCRIPTION OF SYMBOLS 1 Threading device of sewing machine 2 Threading shaft 3 Threading holder 4 Needle 5 Threading guide 6 Threading guide 7 Threading hook 41 Needle hole 51 Head 52 Jaw part 52a Inclined surface 61 Head 62 Jaw part 71 Thread lock Part

Claims

ミシンの上下方向の軸線に沿わせて設けられ、軸線回りに回転する糸通し軸と、
前記糸通し軸に設けられ、前記糸通し軸の回転とともに略水平方向に沿って移動する糸通しホルダと、
前記糸通しホルダに設けられ、針の針穴に通す糸が架け渡される二つの糸通しガイドと、
前記糸通しホルダに設けられ、前記針穴を通過可能に形成されるとともに前記二つの糸通しガイドに挟まれるように配置され、前記二つの糸通しガイドに架け渡された糸を係止する糸通しフックと、を備え、
前記糸通し軸を回転させて前記糸通しホルダを移動させ、前記糸通しフックを前記針穴に通過させて前記二つの糸通しガイドに糸を架け渡し、前記糸通し軸を逆方向に回転させることにより、前記糸通しフックが糸を係止した状態で前記針穴から退避することにより針に糸を通すミシンの糸通し装置において、
各糸通しガイドは、上方に設けられた頭部と前記頭部から下方に隙間をあけて設けられた顎部とを有し、前記頭部の下端と前記顎部の上端との間に形成される隙間に糸が架け渡されるように構成され、
一方の糸通しガイドにおける顎部の上端面には、前記糸通しフックの糸係止部よりも基端側から先端側に向かうにつれて下方に傾斜する傾斜面が形成されていることを特徴とするミシンの糸通し装置。 A threading shaft that is provided along the vertical axis of the sewing machine and rotates around the axis;
A threading holder that is provided on the threading shaft and moves along a substantially horizontal direction with the rotation of the threading shaft;
Two threading guides provided in the threading holder, over which a thread to be passed through the needle hole of the needle is bridged;
Thread provided in the threading holder, formed so as to be able to pass through the needle hole, and disposed so as to be sandwiched between the two threading guides, and for locking the thread stretched over the two threading guides A through hook, and
The threading shaft is rotated to move the threading holder, the threading hook is passed through the needle hole, the thread is bridged between the two threading guides, and the threading shaft is rotated in the reverse direction. In the threading device of the sewing machine that passes the thread through the needle by retreating from the needle hole while the threading hook is engaged with the thread,
Each threading guide has a head portion provided above and a jaw portion provided with a gap downward from the head portion, and is formed between a lower end of the head portion and an upper end of the jaw portion. Configured so that the thread is spanned across the gap
The upper end surface of the jaw portion of one threading guide is formed with an inclined surface that is inclined downward from the proximal end side toward the distal end side with respect to the thread locking portion of the threading hook. Sewing machine threading device.

前記傾斜面は、前記糸通し軸を回転する際にその回転中心から見て内側に位置する糸通しガイドの顎部に形成されていることを特徴とする請求項１に記載のミシンの糸通し装置。 The threading of the sewing machine according to claim 1, wherein the inclined surface is formed on a jaw part of a threading guide that is located inwardly when viewed from the rotation center when the threading shaft is rotated. apparatus.

前記傾斜面が形成された一方の糸通しガイドにおける顎部は、前記糸通しフックの延在方向に沿わせて延びるように形成されていることを特徴とする請求項１又は２に記載のミシンの糸通し装置。 The sewing machine according to claim 1 or 2, wherein a jaw portion of one of the threading guides on which the inclined surface is formed is formed so as to extend along an extending direction of the threading hook. Threading device.