JP6945757B1 - Sewing machine structure - Google Patents

Sewing machine structure Download PDF

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JP6945757B1
JP6945757B1 JP2021018606A JP2021018606A JP6945757B1 JP 6945757 B1 JP6945757 B1 JP 6945757B1 JP 2021018606 A JP2021018606 A JP 2021018606A JP 2021018606 A JP2021018606 A JP 2021018606A JP 6945757 B1 JP6945757 B1 JP 6945757B1
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sewing machine
machine structure
drive shaft
hook
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瑞榮 卓
瑞榮 卓
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星鋭縫▲じん▼機股▲ふん▼有限公司
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Abstract

【課題】昇降ストロークの変位距離を変えて様々な布地に対応するミシン構造を提供する。【解決手段】ミシン構造１０であって、垂直方向に往復する針棒１１と、針棒を推進するリンク１２と、リンクを駆動する駆動軸１３を含み、リンクは駆動軸に組み付けられる第１端１２１と、針棒に組み付けられる第２端１２２を備え、第１端は駆動軸の作用により円形経路に移動する。リンクの第１端の針板１４に対する高さは例外なく第２端の針板に対する高さより低く、リンクの第１端が円形経路の３時位置から反時計回りに１２時位置に変位する場合に針棒が上ストローク変位距離だけ走行し、リンクの第１端が円形経路の６時位置から反時計回りに３時位置に変位する場合に針棒が下ストローク変位距離だけ走行する。本構造では上ストローク変位距離１１２を下ストローク変位距離より長くすることにより、様々な布地に対応できる。【選択図】図３PROBLEM TO BE SOLVED: To provide a sewing machine structure corresponding to various fabrics by changing the displacement distance of an elevating stroke. SOLUTION: The sewing machine structure 10 includes a needle bar 11 that reciprocates in the vertical direction, a link 12 that propels the needle bar, and a drive shaft 13 that drives the link, and the link is a first end that is assembled to the drive shaft. It includes 121 and a second end 122 to be assembled to the needle bar, and the first end moves in a circular path by the action of a drive shaft. When the height of the first end of the link with respect to the needle plate 14 is lower than the height of the second end with respect to the needle plate without exception, and the first end of the link is displaced from the 3 o'clock position of the circular path to the 12 o'clock position counterclockwise. When the needle rod travels by the upper stroke displacement distance and the first end of the link is displaced from the 6 o'clock position on the circular path to the 3 o'clock position counterclockwise, the needle rod travels by the lower stroke displacement distance. In this structure, by making the upper stroke displacement distance 112 longer than the lower stroke displacement distance, it is possible to cope with various fabrics. [Selection diagram] Fig. 3

Description

本発明は、ミシン構造に関し、特に、昇降ストロークの変位距離を変えて様々な布地に対応するミシン構造に関する。 The present invention relates to a sewing machine structure, and more particularly to a sewing machine structure corresponding to various fabrics by changing the displacement distance of the elevating stroke.

紡績産業の技術進歩と材料技術の発展により、素材や特性が従来の布地と異なる布地が多く開発されている。また、経済発展に伴い、人々がファッションや生活の質向上に目を向け、服装の着心地のよさが重要視されるようになる。ファッションデザイナが考案する複雑な設計に応じて、縫製方法の改善が求められる。 Due to technological advances in the spinning industry and the development of material technology, many fabrics with different materials and properties from conventional fabrics have been developed. In addition, with economic development, people are looking to improve fashion and quality of life, and the comfort of clothes is becoming more important. Improvements in sewing methods are required according to the complex designs devised by fashion designers.

従来のミシンでは布地の厚さなどに応じて、送り歯の差動送り比や糸張力などの調整により前記改善が行われる。送り歯の差動送り比を調整する場合、例えば、特許文献１、特許文献２などに記載されるように、従来のミシンでは縫針を送り出す回数や縫針のストローク距離が変わらず、前後の送り歯の移動ストロークを調整することで、前の送り歯が送る布量と後の送り歯が送る布量を同じくし、又は差を出す（これを差動送り比という）ことにより、ミシンが対応可能な布地を増やす。 In a conventional sewing machine, the above improvement is performed by adjusting the differential feed ratio of the feed dog, the thread tension, and the like according to the thickness of the fabric and the like. When adjusting the differential feed ratio of the feed dog, for example, as described in Patent Document 1 and Patent Document 2, the number of times the sewing needle is fed and the stroke distance of the sewing needle do not change in the conventional sewing machine, and the front and rear feed dogs are adjusted. By adjusting the movement stroke of, the amount of cloth sent by the front feed dog and the amount of cloth sent by the rear feed dog are the same or different (this is called the differential feed ratio), and the sewing machine can handle it. Increase the number of new fabrics.

しかし従来のミシンでは関連の要素を変更して前記改善が行われ、つまり、従来のミシンでは駆動軸の位置又は針棒のストローク距離が直接的に変えられないため、送り歯の差動送り比や糸張力の調整に際して駆動軸又は針棒のストロークを考慮しなければならず、ミシンの設計と改善に手間がかかる。 However, in the conventional sewing machine, the related elements are changed to make the above improvement. That is, in the conventional sewing machine, the position of the drive shaft or the stroke distance of the needle bar cannot be directly changed, so that the differential feed ratio of the feed dog is changed. And when adjusting the thread tension, the stroke of the drive shaft or needle bar must be taken into consideration, and it takes time and effort to design and improve the sewing machine.

また、特許文献３、特許文献４、特許文献５、特許文献６などではミシンの改良には前記方法の代わりに、縫針のストローク距離を改善することで行われる。しかし、特許文献３のように、スクリューに組み付ける針棒の高さを調整して縫針のストローク距離を変える場合に、駆動軸や針棒について設計する必要があるため、ミシンメーカーにとって好ましくない。 Further, in Patent Document 3, Patent Document 4, Patent Document 5, Patent Document 6, and the like, the sewing machine is improved by improving the stroke distance of the sewing needle instead of the above method. However, as in Patent Document 3, when the height of the needle bar to be assembled to the screw is adjusted to change the stroke distance of the sewing needle, it is necessary to design the drive shaft and the needle bar, which is not preferable for the sewing machine maker.

中国台湾特許第ＴＷＩ２７１４５７号China Taiwan Patent No. TWI271457 中国台湾実用新案第ＴＷＭ５０９８１４号China-Taiwan Utility Model No. TWM509814 中国台湾特許第ＴＷＩ４２９８０１Ｂ号China Taiwan Patent No. TWI429801B 日本公開特許第ＪＰ２００７００６９１２号Japanese Publication Patent No. JP2007006912 中国公開特許第ＣＮ１０６４７１１７１Ａ号Chinese Publication Patent No. CN106471171A 中国台湾特許第ＴＷＩ５９５１３４号China Taiwan Patent No. TWI595134

本発明の第１の目的は、従来のミシン構造では様々な布地に対応するためには関連の要素を変更する必要があるという問題を解決することである。 A first object of the present invention is to solve the problem that a conventional sewing machine structure needs to change related elements in order to cope with various fabrics.

本発明の第２の目的は、従来のミシンでは様々な布地に対応するためには駆動軸などの要素について設計する必要があるという問題を解決することである。 A second object of the present invention is to solve the problem that a conventional sewing machine needs to design elements such as a drive shaft in order to cope with various fabrics.

本発明は、上記の目的を達成するためになされるものであって、連れられて垂直軸において往復変位する針棒と、当該針棒を推進するリンクと、当該リンクを駆動して移動させる駆動軸とを含み、当該リンクは当該駆動軸に組み付けられる第１端と、当該針棒に組み付けられる第２端とを備え、当該第１端は当該駆動軸の作用により円形経路に移動する。さらに、当該リンクの当該第１端の針板に対する高さは例外なく当該リンクの当該第２端の当該針板に対する高さより低く、当該リンクの当該第１端が当該円形経路の３時位置から反時計回りに１２時位置に変位する場合に当該針棒が上ストローク変位距離だけ走行し、当該リンクの当該第１端が当該円形経路の６時位置から反時計回りに３時位置に変位する場合に当該針棒が下ストローク変位距離だけ走行し、当該上ストローク変位距離は当該下ストローク変位距離より長い、ミシン構造を提供する。 The present invention is made to achieve the above object, and a needle bar that is taken and reciprocally displaced on a vertical axis, a link that propels the needle bar, and a drive that drives and moves the link. The link includes a shaft, the link includes a first end assembled to the drive shaft and a second end to be assembled to the needle bar, and the first end moves in a circular path by the action of the drive shaft. Further, the height of the first end of the link with respect to the needle plate is, without exception, lower than the height of the second end of the link with respect to the needle plate, and the first end of the link is from the 3 o'clock position of the circular path. When displaced counterclockwise to the 12 o'clock position, the needle rod travels by the upper stroke displacement distance, and the first end of the link is displaced counterclockwise from the 6 o'clock position to the 3 o'clock position on the circular path. Provided is a sewing machine structure in which the needle rod travels by the lower stroke displacement distance, and the upper stroke displacement distance is longer than the lower stroke displacement distance.

一実施例では、当該駆動軸は当該リンクに組み付けられるカムを備え、当該カムには当該第１端に組み付けて偏心部が成形される。 In one embodiment, the drive shaft comprises a cam that is assembled to the link, and the cam is assembled to the first end to form an eccentric portion.

一実施例では、当該ミシン構造は上方筐体と、当該上方筐体に接続され且つ当該針板を設置できる下方筐体とを含み、当該上方筐体にチャンバーが成形され、当該駆動軸、当該リンク及び当該針棒は当該チャンバー内に互いに組み付けられ、当該筐体は当該第２端が当該垂直軸に沿って移動するよう制限するために当該駆動軸より高いように当該チャンバー内に設けられる走路を備える。 In one embodiment, the sewing machine structure includes an upper housing and a lower housing that is connected to the upper housing and on which the needle plate can be installed, and a chamber is formed in the upper housing, and the drive shaft and the drive shaft are provided. The link and the needle bar are assembled together in the chamber, and the housing is provided in the chamber so that the second end is higher than the drive shaft to restrict movement along the vertical axis. To be equipped.

一実施例では、当該チャンバーは中線によって上部及び下部に分けられ、当該駆動軸は当該下部に位置し、当該走路は当該上部に位置する。 In one embodiment, the chamber is divided into an upper part and a lower part by a middle line, the drive shaft is located in the lower part, and the runway is located in the upper part.

一実施例では、当該ミシン構造は当該下方筐体内に位置する下フックと、当該下方筐体内に設けられるフックドライブとを含み、当該下フックは当該フックドライブに組み付けられる装着部と、当該装着部より延伸する直線延伸部と、当該直線延伸部の当該装着部に接続されない端より延伸する斜め延伸部と、当該斜め延伸部より当該装着部の方向に向かって延伸する引っ掛け部とを備える。 In one embodiment, the sewing machine structure includes a lower hook located in the lower housing and a hook drive provided in the lower housing, and the lower hook includes a mounting portion to be assembled to the hook drive and the mounting portion. It includes a linearly stretched portion that extends more, a diagonally stretched portion that extends from an end of the linearly stretched portion that is not connected to the mounting portion, and a hook portion that extends from the diagonally stretched portion toward the mounting portion.

本発明の内容に関する上記の記載から、従来技術と比べ、本発明が次の利点を備えることが明らかになる。本発明では、リンクの第１端が円形経路の３時位置から反時計回りに１２時位置に変位する場合に針棒が走行する上ストローク変位距離が、リンクの第１端が円形経路の６時位置から反時計回りに３時位置に変位する場合に針棒が走行する下ストローク変位距離より長く、例えば、上ストローク変位距離を少なくとも１０ｍｍ以上に設定することにより、ミシン構造が様々な布地に対応する。また、本発明では前記構造により下フックの引っ掛け部の長さが従来の構造より短くなるため、下方筐体内の空間が解放され、引っ掛け部の接線方向がより安定的になる。 From the above description of the contents of the present invention, it becomes clear that the present invention has the following advantages as compared with the prior art. In the present invention, when the first end of the link is displaced from the 3 o'clock position on the circular path to the 12 o'clock position counterclockwise, the upper stroke displacement distance that the needle rod travels is 6 for the first end of the link on the circular path. The sewing machine structure can be applied to various fabrics by setting the upper stroke displacement distance to be at least 10 mm or more, which is longer than the lower stroke displacement distance that the needle rod travels when it is displaced counterclockwise from the hour position to the 3 o'clock position. handle. Further, in the present invention, since the length of the hooking portion of the lower hook is shorter than that of the conventional structure due to the structure, the space in the lower housing is released and the tangential direction of the hooking portion becomes more stable.

図１は本発明ミシン構造の針棒の動作の模式図その１である。FIG. 1 is a schematic view 1 of the operation of a needle bar having a sewing machine structure of the present invention. 図２は本発明ミシン構造の針棒の動作の模式図その２である。FIG. 2 is a schematic view 2 of the operation of the needle bar of the sewing machine structure of the present invention. 図３は本発明ミシン構造の針棒の動作の模式図その３である。FIG. 3 is a schematic view 3 of the operation of the needle bar of the sewing machine structure of the present invention. 図４は本発明ミシン構造の針棒の動作の模式図その４である。FIG. 4 is a schematic view No. 4 of the operation of the needle bar of the sewing machine structure of the present invention. 図５は本発明ミシン構造の一部要素の模式図である。FIG. 5 is a schematic view of some elements of the sewing machine structure of the present invention. 図６は本発明ミシン構造の下フックの模式図その１である。FIG. 6 is a schematic view No. 1 of the lower hook of the sewing machine structure of the present invention. 図７は本発明ミシン構造の下フックの模式図その２である。FIG. 7 is a schematic view No. 2 of the lower hook of the sewing machine structure of the present invention.

次に、図面を参照して、本発明の技術内容を詳細に説明する。
図１から図５が参照されるとおり、本発明はミシン構造１０を提供する。ミシン構造１０は針棒１１と、リンク１２と、駆動軸１３とを含み、針棒１１はリンク１２に接続され、針棒１１はリンク１２に連れられて垂直軸１１１において往復変位し、駆動軸１３はリンク１２の針棒１１から遠い端に接続され、駆動軸１３はミシン構造１０が動作する時にリンク１２を駆動して移動させる。リンク１２は駆動軸１３及び針棒１１に組み付けられ、リンク１２は駆動軸１３に組み付けられる第１端１２１と、針棒１１に組み付けられる第２端１２２とを備え、リンク１２は駆動軸１３に連れられて動作する時、その第１端１２１が円形経路１２３に移動する。第１端１２１が円形経路１２３に移動する間、第１端１２１の針板１４に対する高さは例外なく第２端１２２の針板１４に対する高さより低い。また図１に示すように、リンク１２の第１端１２１が円形経路１２３の６時位置（１２４）から反時計回りに円形経路１２３の１２時位置（１２５）に変位する場合に、針棒１１を引き戻す。針棒１１を引き戻す間、リンク１２の第１端１２１が円形経路１２３の３時位置（１２６）から反時計回りに円形経路１２３の１２時位置（１２５）に変位する場合に、針棒１１が上ストローク変位距離１１２だけ走行し、リンク１２の第１端１２１が円形経路１２３の６時位置（１２４）から反時計回りに円形経路１２３の３時位置（１２６）に変位する場合に、針棒１１が下ストローク変位距離１１３だけ走行し、上ストローク変位距離１１２は下ストローク変位距離１１３より長い。 Next, the technical contents of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 5, the present invention provides a sewing machine structure 10. The sewing machine structure 10 includes a needle bar 11, a link 12, and a drive shaft 13. The needle bar 11 is connected to the link 12, and the needle bar 11 is reciprocally displaced on the vertical axis 111 by being taken by the link 12, and the drive shaft 13 is connected to an end far from the needle bar 11 of the link 12, and the drive shaft 13 drives and moves the link 12 when the sewing machine structure 10 operates. The link 12 is assembled to the drive shaft 13 and the needle bar 11, the link 12 includes a first end 121 assembled to the drive shaft 13 and a second end 122 to be assembled to the needle bar 11, and the link 12 is attached to the drive shaft 13. When taken and operated, its first end 121 moves to the circular path 123. While the first end 121 moves to the circular path 123, the height of the first end 121 with respect to the needle plate 14 is, without exception, lower than the height of the second end 122 with respect to the needle plate 14. Further, as shown in FIG. 1, when the first end 121 of the link 12 is displaced counterclockwise from the 6 o'clock position (124) of the circular path 123 to the 12 o'clock position (125) of the circular path 123, the needle bar 11 Pull back. When the first end 121 of the link 12 is displaced counterclockwise from the 3 o'clock position (126) of the circular path 123 to the 12 o'clock position (125) of the circular path 123 while the needle bar 11 is pulled back, the needle bar 11 is displaced. When the first end 121 of the link 12 is displaced from the 6 o'clock position (124) of the circular path 123 to the 3 o'clock position (126) of the circular path 123 after traveling only the upper stroke displacement distance 112, the needle bar 11 travels by the lower stroke displacement distance 113, and the upper stroke displacement distance 112 is longer than the lower stroke displacement distance 113.

本発明では駆動軸１３に駆動される時のリンク１２の第１端１２１の円形経路１２３を変えることにより、針棒１１の上ストローク変位距離１１２及び下ストローク変位距離１１３を変更することを実現する。例えば、本発明のミシン構造１０ではより多くの布地に対応するように、上ストローク変位距離１１２は少なくとも１０ｍｍ以上に設定する。具体的には、本発明では従来のように送り歯の差動送り比や糸張力などを変える代わりに、針棒１１の上ストローク変位距離１１２を下ストローク変位距離１１３より長くすることにより、ミシン構造１０は従来の縫製技術による制限がなく様々な布地に対応できる。 In the present invention, the upper stroke displacement distance 112 and the lower stroke displacement distance 113 of the needle bar 11 can be changed by changing the circular path 123 of the first end 121 of the link 12 when driven by the drive shaft 13. .. For example, in the sewing machine structure 10 of the present invention, the upper stroke displacement distance 112 is set to at least 10 mm or more so as to correspond to more fabrics. Specifically, in the present invention, instead of changing the differential feed ratio of the feed dog and the thread tension as in the prior art, the upper stroke displacement distance 112 of the needle rod 11 is made longer than the lower stroke displacement distance 113, thereby making the sewing machine. The structure 10 can be applied to various fabrics without being limited by the conventional sewing technique.

また図１から図５が参照されるとおり、図１に示すように、リンク１２の第１端１２１が円形経路１２３の１２時位置（１２５）から反時計回りに円形経路１２３の６時位置（１２４）に変位する場合に、針棒１１を送り出す。針棒１１を送り出す間、リンク１２の第１端１２１が円形経路１２３の１２時位置（１２５）から反時計回りに円形経路１２３の９時位置（１２７）に変位する場合に、針棒１１が上ストローク変位距離１１２だけ走行し、リンク１２の第１端１２１が円形経路１２３の９時位置（１２７）から反時計回りに円形経路１２３の６時位置（１２４）に変位する場合に、針棒１１が下ストローク変位距離１１３だけ走行する。言い換えれば、針棒１１を送り出すにしても引き戻すにしても、リンク１２の第１端１２１が円形経路１２３の３時位置から９時位置に移動する場合の針棒１１の上ストローク変位距離１１２は、リンク１２の第１端１２１が円形経路１２３の９時位置から３時位置に移動する場合の針棒１１の下ストローク変位距離１１３よりも大きい。ミシン構造１０は様々な布地の縫製に対応できる。 Further, as shown in FIGS. 1 to 5, as shown in FIG. 1, the first end 121 of the link 12 is at the 6 o'clock position (125) of the circular path 123 counterclockwise from the 12 o'clock position (125) of the circular path 123 (6 o'clock position of the circular path 123). When displaced to 124), the needle bar 11 is sent out. When the first end 121 of the link 12 is displaced counterclockwise from the 12 o'clock position (125) of the circular path 123 to the 9 o'clock position (127) of the circular path 123 while the needle bar 11 is sent out, the needle bar 11 is displaced. When the first end 121 of the link 12 is displaced from the 9 o'clock position (127) of the circular path 123 to the 6 o'clock position (124) of the circular path 123 after traveling only the upper stroke displacement distance 112, the needle bar 11 travels by the lower stroke displacement distance 113. In other words, regardless of whether the needle bar 11 is sent out or pulled back, the upper stroke displacement distance 112 of the needle bar 11 when the first end 121 of the link 12 moves from the 3 o'clock position to the 9 o'clock position of the circular path 123 is , The first end 121 of the link 12 is larger than the lower stroke displacement distance 113 of the needle bar 11 when the circular path 123 moves from the 9 o'clock position to the 3 o'clock position. The sewing machine structure 10 can be used for sewing various fabrics.

また、駆動軸１３はリンク１２に組み付けられるカム１３１を備え、カム１３１には偏心部１３２が成形され、偏心部１３２はリンク１２の第１端１２１を組み付けられ、偏心部１３２は第１端１２１を推進してリンク１２を動作させる。 Further, the drive shaft 13 includes a cam 131 to be assembled to the link 12, an eccentric portion 132 is formed on the cam 131, the eccentric portion 132 is assembled to the first end 121 of the link 12, and the eccentric portion 132 is the first end 121. To operate the link 12.

また図１が参照されるとおり、ミシン構造１０は上方筐体１５と、下方筐体１６とを備え、上方筐体１５には駆動軸１３、リンク１２及び針棒１１を内部に設置するためにチャンバー１５１が成形され、駆動軸１３、リンク１２及び針棒１１はチャンバー１５１内に互いに組み付けられる。上方筐体１５内には走路１５２がチャンバー１５１内に設けられ、走路１５２はリンク１２の第２端１２２に接続され且つ駆動軸１３より高く、走路１５２はリンク１２の第２端１２２が垂直軸１１１に沿って移動するように制限するとともに、針棒１１を安定的に移動させる。別の一実施例では、チャンバー１５１は中線１５３によって上部１５４及び下部１５５に分けられ、駆動軸１３は下部１５５に位置し、走路１５２は上部１５４に位置する。 Further, as shown in FIG. 1, the sewing machine structure 10 includes an upper housing 15 and a lower housing 16, and the drive shaft 13, the link 12, and the needle bar 11 are installed inside the upper housing 15. The chamber 151 is formed and the drive shaft 13, the link 12 and the needle bar 11 are assembled together in the chamber 151. A runway 152 is provided in the chamber 151 in the upper housing 15, the runway 152 is connected to the second end 122 of the link 12 and higher than the drive shaft 13, and the runway 152 has the second end 122 of the link 12 as the vertical axis. While limiting the movement along the 111, the needle bar 11 is stably moved. In another embodiment, the chamber 151 is divided into an upper part 154 and a lower part 155 by a middle line 153, the drive shaft 13 is located in the lower part 155, and the runway 152 is located in the upper part 154.

さらに、図１、図５から図７が参照されるとおり、一実施例では、下方筐体１６は上方筐体１５に接続され且つ針板１４を設置でき、ミシン構造１０は下フック１７と、下フックドライブ１８とを含み、下フックドライブ１８及び下フック１７は下方筐体１６内に設けられ、且つ下フックドライブ１８は下フック１７に組み付けられ、下フックドライブ１８は下フック１７を駆動して針板１４に対して往復変位させる。下フック１７は装着部１７１と、直線延伸部１７２と、斜め延伸部１７３と、引っ掛け部１７４とを含み、装着部１７１は下フックドライブ１８に接続され且つ下フックドライブ１８に連れられ、直線延伸部１７２は装着部１７１より延伸し、斜め延伸部１７３は直線延伸部１７２の装着部１７１に接続されない端より延伸し、引っ掛け部１７４は斜め延伸部１７３に接続され且つ装着部１７１の方向に向かって延伸する。本発明のミシン構造１０は針棒１１の上ストローク変位距離１１２及び下ストローク変位距離１１３を変更することで、従来の下フックの代わりに下フック１７を用いて実施できる。さらに、下フック１７の引っ掛け部１７４のサイズが小さくなると、ミシン構造１０で下方筐体１６内の空間が解放され、下フック１７の接線方向がより安定的になる。 Further, as shown in FIGS. 1, 5 to 7, in one embodiment, the lower housing 16 is connected to the upper housing 15 and the needle plate 14 can be installed, and the sewing machine structure 10 has the lower hook 17 and the like. The lower hook drive 18 and the lower hook 17 are provided in the lower housing 16, and the lower hook drive 18 is assembled to the lower hook 17, and the lower hook drive 18 drives the lower hook 17. The needle plate 14 is reciprocally displaced. The lower hook 17 includes a mounting portion 171, a linear stretching portion 172, an oblique stretching portion 173, and a hooking portion 174, and the mounting portion 171 is connected to the lower hook drive 18 and taken to the lower hook drive 18 for linear stretching. The portion 172 extends from the mounting portion 171, the diagonally stretched portion 173 extends from the end of the linearly stretched portion 172 that is not connected to the mounting portion 171, and the hook portion 174 is connected to the diagonally stretched portion 173 and faces the mounting portion 171. And stretch. The sewing machine structure 10 of the present invention can be implemented by using the lower hook 17 instead of the conventional lower hook by changing the upper stroke displacement distance 112 and the lower stroke displacement distance 113 of the needle bar 11. Further, when the size of the hook portion 174 of the lower hook 17 becomes smaller, the space inside the lower housing 16 is released by the sewing machine structure 10, and the tangential direction of the lower hook 17 becomes more stable.

１０ ミシン構造
１１ 針棒
１１１ 垂直軸
１１２ 上ストローク変位距離
１１３ 下ストローク変位距離
１２ リンク
１２１ 第１端
１２２ 第２端
１２３ 円形経路
１２４ ６時位置
１２５ １２時位置
１２６ ３時位置
１２７ ９時位置
１３ 駆動軸
１３１ カム
１３２ 偏心部
１４ 針板
１５ 上方筐体
１５１ チャンバー
１５２ 走路
１５３ 中線
１５４ 上部
１５５ 下部
１６ 下方筐体
１７ 下フック
１７１ 装着部
１７２ 直線延伸部
１７３ 斜め延伸部
１７４ 引っ掛け部
１８ 下フックドライブ 10 Sewing machine structure 11 Needle bar 111 Vertical axis 112 Upper stroke displacement distance 113 Lower stroke displacement distance 12 Link 121 1st end 122 2nd end 123 Circular path 124 6 o'clock position 125 12 o'clock position 126 3 o'clock position 127 9 o'clock position 13 Drive Shaft 131 Cam 132 Eccentric part 14 Needle plate 15 Upper housing 151 Chamber 152 Runway 153 Midline 154 Upper 155 Lower 16 Lower housing 17 Lower hook 171 Mounting part 172 Straight extension part 173 Diagonal extension part 174 Hook part 18 Lower hook drive

Claims (6)

連れられて垂直軸において往復変位する針棒と、前記針棒を推進するリンクと、前記リンクを駆動して移動させる駆動軸とを含み、前記リンクは前記駆動軸に組み付けられる第１端と、前記針棒に組み付けられる第２端とを備え、前記第１端は前記駆動軸の作用により円形経路に移動するミシン構造において、
前記リンクの前記第１端の針板に対する高さは例外なく前記リンクの前記第２端の前記針板に対する高さより低く、前記リンクの前記第１端が前記円形経路の３時位置から反時計回りに１２時位置に変位する場合に前記針棒が上ストローク変位距離だけ走行し、前記リンクの前記第１端が前記円形経路の６時位置から反時計回りに３時位置に変位する場合に前記針棒が下ストローク変位距離だけ走行し、前記上ストローク変位距離は前記下ストローク変位距離より長いことを特徴とするミシン構造。 It includes a needle bar that is taken and reciprocally displaced on a vertical axis, a link that propels the needle bar, and a drive shaft that drives and moves the link, and the link has a first end that is assembled to the drive shaft. In a sewing machine structure, the sewing machine structure is provided with a second end to be assembled to the needle bar, and the first end moves in a circular path by the action of the drive shaft.
The height of the first end of the link with respect to the needle plate is, without exception, lower than the height of the second end of the link with respect to the needle plate, and the first end of the link is counterclockwise from the 3 o'clock position of the circular path. When the needle rod travels by the upper stroke displacement distance when it is displaced to the 12 o'clock position in a clockwise direction, and the first end of the link is displaced to the 3 o'clock position counterclockwise from the 6 o'clock position of the circular path. A sewing machine structure characterized in that the needle rod travels by a lower stroke displacement distance, and the upper stroke displacement distance is longer than the lower stroke displacement distance. 前記駆動軸は前記リンクに組み付けられるカムを備え、前記カムには前記第１端に組み付けて偏心部が成形されることを特徴とする請求項１に記載のミシン構造。 The sewing machine structure according to claim 1, wherein the drive shaft includes a cam that is assembled to the link, and the cam is assembled to the first end to form an eccentric portion. 前記ミシン構造は上方筐体と、前記上方筐体に接続され且つ前記針板を設置できる下方筐体とを含み、前記上方筐体にチャンバーが成形され、前記駆動軸、前記リンク及び前記針棒は前記チャンバー内に互いに組み付けられ、前記上方筐体は前記第２端が前記垂直軸に沿って移動するよう制限するために前記駆動軸より高いように前記チャンバー内に設けられる走路を備えることを特徴とする請求項１又は２に記載のミシン構造。 The sewing machine structure includes an upper housing and a lower housing connected to the upper housing and on which the needle plate can be installed. A chamber is formed in the upper housing, and the drive shaft, the link, and the needle bar are formed. Are assembled together in the chamber, and the upper housing is provided with a runway provided in the chamber so that the second end is higher than the drive shaft to restrict movement along the vertical axis. The sewing machine structure according to claim 1 or 2. 前記チャンバーは中線によって上部及び下部に分けられ、前記駆動軸は前記下部に位置し、前記走路は前記上部に位置することを特徴とする請求項３に記載のミシン構造。 The sewing machine structure according to claim 3, wherein the chamber is divided into an upper part and a lower part by a middle line, the drive shaft is located in the lower part, and the runway is located in the upper part. 前記ミシン構造は前記下方筐体内に位置する下フックと、前記下方筐体内に設けられるフックドライブとを含み、前記下フックは前記フックドライブに組み付けられる装着部と、前記装着部より延伸する直線延伸部と、前記直線延伸部の前記装着部に接続されない端より延伸する斜め延伸部と、前記斜め延伸部より前記装着部の方向に向かって延伸する引っ掛け部とを備えることを特徴とする請求項４に記載のミシン構造。 The sewing machine structure includes a lower hook located in the lower housing and a hook drive provided in the lower housing, and the lower hook has a mounting portion assembled to the hook drive and a linear extension extending from the mounting portion. The claim is characterized by comprising a portion, a diagonally stretched portion extending from an end of the linear stretched portion not connected to the mounting portion, and a hook portion extending from the diagonally stretched portion toward the mounting portion. The sewing machine structure according to 4. 前記ミシン構造は前記下方筐体内に位置する下フックと、前記下方筐体内に設けられるフックドライブとを含み、前記下フックは前記フックドライブに組み付けられる装着部と、前記装着部より延伸する直線延伸部と、前記直線延伸部の前記装着部に接続されない端より延伸する斜め延伸部と、前記斜め延伸部より前記装着部の方向に向かって延伸する引っ掛け部とを備えることを特徴とする請求項３に記載のミシン構造。 The sewing machine structure includes a lower hook located in the lower housing and a hook drive provided in the lower housing, and the lower hook has a mounting portion assembled to the hook drive and a linear extension extending from the mounting portion. The claim is characterized by comprising a portion, a diagonally stretched portion extending from an end of the linear stretched portion not connected to the mounting portion, and a hook portion extending from the diagonally stretched portion toward the mounting portion. The sewing machine structure according to 3.
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JPS61217197A (en) * 1985-03-20 1986-09-26 ブラザー工業株式会社 Sewing machine
JPH01300990A (en) * 1988-05-30 1989-12-05 Brother Ind Ltd Double-needle corner sewing machine with thread cutting device
JP2850591B2 (en) * 1991-08-30 1999-01-27 ブラザー工業株式会社 Needle bar drive of sewing machine
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