JP2007117366A - Chain stitch sewing machine - Google Patents

Chain stitch sewing machine Download PDF

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JP2007117366A
JP2007117366A JP2005312954A JP2005312954A JP2007117366A JP 2007117366 A JP2007117366 A JP 2007117366A JP 2005312954 A JP2005312954 A JP 2005312954A JP 2005312954 A JP2005312954 A JP 2005312954A JP 2007117366 A JP2007117366 A JP 2007117366A
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looper
shaft
sewing machine
interlocking member
swinging
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正人 ▲高▼橋
Masato Takahashi
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Juki Corp
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Juki Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance the speed of the actuation of a looper by favorably feeding oil without staining a sewing thread locked to the looper. <P>SOLUTION: This chain stitch sewing machine 1 is provided with a looper shaft 52 provided in a forced oil-feeding area A continuously feeding lubricating oil inside a machine frame 2 and allowing a reciprocating movement in the axial direction and swinging in the axial rotation direction, an interlocking member 61 provided in one end of the looper shaft 52 outside the machine frame 2 and swinging with the swinging operation of the looper shaft 52, a plurality of looper retaining parts 62 and 63 swingably formed respectively and disposed to equal the distance from the respective swinging centers to the swinging center of the interlocking member 61, a transmission member 74 connecting the interlocking member 61 to the plurality of looper retaining parts 62 and 63 and transmitting the swinging of the interlocking member 61 to the respective looper retaining parts 62 and 63, and the loopers 64 and 65 provided on the upper ends of the respective looper retaining parts 62 and 63. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、環縫いミシンに関する。   The present invention relates to a chain stitch sewing machine.

従来より、シャツの前立てやジーンズウエストバンド等のように、二本針又は四本針で二重環縫いを行う環縫いミシンが知られている（例えば、特許文献１参照）。このような複数のルーパを有する環縫いミシンのうち、図６に示すような横ルーパ式と呼ばれる環縫いミシンにおいては、ルーパを長円運動させながら縫製を行う。すなわち、ルーパの運動は前後方向と左右方向の成分とを有し、ルーパを前後方向に駆動させる機構と左右方向に駆動させる機構が設けられている。   Conventionally, a chain stitch sewing machine that performs double chain stitching with two needles or four needles, such as a shirt placket or a jeans waistband, is known (for example, see Patent Document 1). Among the chain stitch sewing machines having a plurality of loopers, a chain stitch sewing machine called a horizontal looper type as shown in FIG. 6 performs sewing while moving the looper into an ellipse. That is, the movement of the looper has components in the front-rear direction and the left-right direction, and a mechanism for driving the looper in the front-rear direction and a mechanism for driving in the left-right direction are provided.

図６を用いて具体的に説明すると、ミシンの駆動源となるミシンモータに接続された下軸１０１には偏心カムに取り付けられた駆動伝達部材１０２が設けられ、下軸１０１の回転により駆動伝達部材１０２が上下動する。この駆動伝達部材１０２には、下軸１０１の軸線に直交する方向に延びる左右駆動軸１０３が当接するように設けられており、駆動伝達部材１０２の上下動に伴って軸回りに揺動するように配置されている。左右駆動軸１０３の先端には、保持部材１０４が取り付けられ、この保持部材１０４には、左右駆動軸１０３に直交する方向に延びる連結部材１０５が設けられている。連結部材１０５には、ネジ等を介してルーパホルダ保持部材１０６が連結されており、このルーパホルダ保持部材１０６には、二つのルーパホルダ１０７，１０８が左右駆動軸１０３に直交する方向に並んで設けられている。これらのルーパホルダ１０７，１０８の上端には、それぞれ縫い糸を係止するルーパ１０９，１１０が設けられている。   More specifically, referring to FIG. 6, the lower shaft 101 connected to the sewing machine motor serving as a driving source of the sewing machine is provided with a drive transmission member 102 attached to an eccentric cam, and the drive transmission is performed by the rotation of the lower shaft 101. The member 102 moves up and down. The drive transmission member 102 is provided with a left and right drive shaft 103 extending in a direction orthogonal to the axis of the lower shaft 101 so as to swing around the axis as the drive transmission member 102 moves up and down. Is arranged. A holding member 104 is attached to the tip of the left and right drive shaft 103, and a connecting member 105 extending in a direction orthogonal to the left and right drive shaft 103 is provided on the holding member 104. A looper holder holding member 106 is connected to the connecting member 105 via a screw or the like, and two looper holders 107 and 108 are provided side by side in the direction perpendicular to the left and right drive shaft 103 on the looper holder holding member 106. Yes. At the upper ends of these looper holders 107 and 108, loopers 109 and 110 for locking sewing threads are provided, respectively.

また、下軸１０１には、下軸１０１の軸線に沿って平行に配置された前後駆動軸１１１が連結されており、この前後駆動軸１１１は、下軸１０１の回転に伴って前後駆動軸１１１が軸回りに揺動する。前後駆動軸１１１は、連結部材１１２〜１１５によりルーパホルダ１０７，１０８と連結されている。
このような機構を採用することにより、左右駆動軸１０３の揺動によりルーパ１０９，１１０は左右方向に揺動し、前後駆動軸１１１の揺動によりルーパ１０９，１１０は前後方向に揺動する。 The front and rear drive shafts 111 arranged in parallel along the axis of the lower shaft 101 are connected to the lower shaft 101. The front and rear drive shaft 111 is connected to the front and rear drive shaft 111 along with the rotation of the lower shaft 101. Swings around the axis. The front and rear drive shaft 111 is connected to the looper holders 107 and 108 by connecting members 112 to 115.
By adopting such a mechanism, the loopers 109 and 110 swing in the left-right direction due to the swing of the left and right drive shaft 103, and the loopers 109 and 110 swing in the front-rear direction due to the swing of the front and rear drive shaft 111.

特開昭６１−５２８９４号公報JP-A 61-52894

ところで、近年、縫製作業の高速化が強く望まれており、そのためにルーパの駆動の高速化も求められている。ルーパを高速で駆動させるためには下軸を高速で回転させればよいが、このような駆動機構は複数の金属部品が連結されて構成されているため、高速駆動によって各部品間の摺動部等に焼き付き等が発生してしまう。焼き付きを防止するためには、部品の摺動部等に大量の潤滑油を給油し続ける必要があるが、ルーパは縫製に用いる縫い糸を係止しているため、ルーパ付近に潤滑油を給油することは縫い糸を汚してしまい縫製品質を下げてしまう。そこで、常に給油すべき機構をミシンフレーム内における周囲が仕切られた領域に配置し、ルーパをミシンフレームの外部に配置することが好ましいが、左右駆動軸１０３からの動力が伝達される機構は、ルーパの並び方向に沿って設けられているため、ミシンフレームの内部に配置することが困難である。そのため、大量の潤滑油を給油し続けることができず、給油は作業者による手差しで対処するしかなく、ルーパの駆動の高速化が困難であった。   By the way, in recent years, there has been a strong demand for speeding up the sewing work, and for that reason, speeding up of the looper driving is also required. In order to drive the looper at a high speed, the lower shaft may be rotated at a high speed. However, since such a drive mechanism is configured by connecting a plurality of metal parts, sliding between the parts by high speed driving is possible. Burning or the like occurs in the part. In order to prevent seizure, it is necessary to continue to supply a large amount of lubricating oil to the sliding parts of the parts. However, since the looper locks the sewing thread used for sewing, supply lubricating oil near the looper. This soils the sewing thread and lowers the quality of the sewing product. Therefore, it is preferable that the mechanism that should always be refueled is arranged in a region where the periphery in the sewing machine frame is partitioned, and the looper is arranged outside the sewing machine frame, but the mechanism for transmitting the power from the left and right drive shaft 103 is Since it is provided along the direction in which the loopers are arranged, it is difficult to place the looper inside the sewing machine frame. Therefore, a large amount of lubricating oil cannot be continuously supplied, and the oil supply can only be dealt with manually by an operator, and it is difficult to increase the speed of driving the looper.

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、ルーパに係止される縫い糸を汚すことなく、給油を良好に行うことができ、ルーパの駆動の高速化を図ることができる環縫いミシン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 problems, and it is possible to satisfactorily supply oil without contaminating the sewing thread locked to the looper, and to increase the speed of driving the looper. An object of the present invention is to provide a chain stitch machine capable of sewing.

以上の課題を解決するため、請求項１に記載の発明は、環縫いミシンにおいて、ミシンフレームの内部において潤滑油が連続的に給油される強制給油領域に設けられ、軸線方向への往復移動及び軸回り方向への揺動が可能とされたルーパ軸と、前記ミシンフレームの外部において前記ルーパ軸の一端に設けられ、前記ルーパ軸の動作に伴って動作する連動部材と、それぞれが前記連動部材と同方向に揺動可能とされ、それぞれの揺動中心から前記連動部材の揺動中心までの間隔が等しくなるように配置された複数のルーパ保持部と、前記連動部材と前記複数のルーパ保持部とを連結し、前記連動部材の動作を各ルーパ保持部に伝達する伝達部材と、各ルーパ保持部の上端に設けられたルーパと、を備えることを特徴とする。   In order to solve the above problems, the invention according to claim 1 is provided in a forced oiling region where lubricating oil is continuously supplied inside a sewing machine frame in a chain stitch sewing machine, and reciprocating in an axial direction and A looper shaft capable of swinging in a direction around the shaft, an interlocking member provided at one end of the looper shaft outside the sewing machine frame, and operating in accordance with the operation of the looper shaft; A plurality of looper holding portions that are arranged so that the distance from each swing center to the swing center of the interlocking member is equal, and the interlocking member and the plurality of looper holdings And a transmission member that transmits the operation of the interlocking member to each looper holding portion, and a looper provided at the upper end of each looper holding portion.

請求項１に記載の発明によれば、ルーパ軸の駆動は連動部材に伝達され、連動部材の往復移動及び揺動は伝達部材を介してルーパ保持部に伝達され、ルーパ保持部に設けられたルーパを揺動させることができる。各ルーパ保持部は、それぞれの揺動中心から連動部材の揺動中心までの間隔が等しくなるように配置されているので、縫い針に通された縫い糸をすくうときの各ルーパの進入角度を等しくすることができるので、縫い目の乱れを防止し、縫製品質を向上させることができる。
また、ルーパ付近の機構をルーパ軸の一端に集中させて配置することができるので、ルーパ軸の一端部だけをミシンフレーム外部に配置し、一端部以外の部分をミシンフレーム内部の強制給油領域に配置しておけば、ルーパ軸の駆動に伴う他の部品との摺動部等には潤滑油が連続的に給油されるので、焼き付きを防止することができる。
また、ルーパの駆動に際しては、一つのルーパ軸でルーパの軸線方向への往復移動とルーパの軸回り方向への揺動が可能となるため、従来よりも簡単な機構で実現することができ、コスト低減を図ることができる。
従って、ルーパに係止される縫い糸を汚すことなく、給油を良好に行うことができ、ルーパの駆動の高速化を図ることができる。 According to the first aspect of the present invention, the driving of the looper shaft is transmitted to the interlocking member, and the reciprocation and swinging of the interlocking member is transmitted to the looper holding part via the transmission member, and is provided in the looper holding part. The looper can be swung. Since each looper holding portion is arranged so that the distance from the respective swing center to the swing center of the interlocking member is equal, the entrance angle of each looper when scooping the sewing thread passed through the sewing needle is equal. Therefore, the seam can be prevented from being disturbed and the quality of the sewing product can be improved.
In addition, since the mechanism near the looper can be concentrated on one end of the looper shaft, only one end of the looper shaft is placed outside the sewing machine frame, and the portions other than the one end are in the forced oiling area inside the sewing machine frame. If arranged, the lubricating oil is continuously supplied to the sliding portion with other parts accompanying the driving of the looper shaft, so that seizure can be prevented.
Also, when driving the looper, it is possible to reciprocate the looper in the axial direction and swing the looper in the direction around the axis with a single looper shaft. Cost reduction can be achieved.
Therefore, it is possible to satisfactorily supply oil without polluting the sewing thread locked to the looper, and to increase the speed of driving the looper.

請求項２に記載の発明は、請求項１に記載の環縫いミシンにおいて、各ルーパ保持部は、球軸受を介して前記伝達部材に連結されていることを特徴とする。   According to a second aspect of the present invention, in the chain stitch sewing machine according to the first aspect, each looper holding portion is connected to the transmission member via a ball bearing.

請求項２に記載の発明によれば、各ルーパ保持部は、球軸受を介して伝達部材に連結されているので、各ルーパ保持部が往復移動又は揺動するときの動きを円滑にすることができ、各ルーパ保持部から伝達部材、連動部材の各連結部の部品精度にばらつきが生じても球軸受が許容するため動作中の引っ掛かりや停止を防止することができる。   According to the second aspect of the present invention, since each looper holding part is connected to the transmission member via the ball bearing, the movement when each looper holding part reciprocates or swings is made smooth. Since the ball bearings allow even if the component accuracy of each connecting portion of the transmission member and the interlocking member varies from each looper holding portion, it is possible to prevent catching and stopping during operation.

請求項３に記載の発明は、請求項１又は２に記載の環縫いミシンにおいて、前記ルーパ保持部に複数のルーパを設けたことを特徴とする。   According to a third aspect of the present invention, in the chain stitch sewing machine according to the first or second aspect, a plurality of loopers are provided in the looper holding portion.

請求項３に記載の発明によれば、ルーパ保持部に複数のルーパを設けることにより、縫製のバリエーションを増加させることができ、縫製パターンの多様化にも対応させることができる。   According to the invention described in claim 3, by providing a plurality of loopers in the looper holding part, it is possible to increase the variation of sewing, and it is possible to cope with diversification of sewing patterns.

請求項１に記載の発明によれば、ルーパに係止される縫い糸を汚すことなく、給油を良好に行うことができ、ルーパの駆動の高速化を図ることができる。   According to the first aspect of the present invention, it is possible to satisfactorily refuel without polluting the sewing thread locked to the looper, and to increase the speed of the looper drive.

請求項２に記載の発明によれば、各ルーパ保持部が揺動又は前後移動するときの動きを円滑にすることができ、各ルーパ保持部から伝達部材、連動部材の各連結部の部品精度にばらつきが生じても球軸受が許容するため動作中の引っ掛かりや停止を防止することができる。   According to the second aspect of the present invention, it is possible to smoothly move each looper holding portion when it swings or moves back and forth, and the component accuracy of each connecting portion from each looper holding portion to the transmission member and the interlocking member. Since the ball bearing allows even if there is a variation in the movement, it is possible to prevent catching or stopping during operation.

請求項３に記載の発明によれば、縫製のバリエーションを増加させることができ、縫製パターンの多様化にも対応させることができる。   According to the third aspect of the present invention, variations in sewing can be increased, and diversification of sewing patterns can be accommodated.

以下、図面を参照して、本発明に係る環縫いミシンの最良の形態について詳細に説明する。
＜環縫いミシンの構成＞
環縫いミシン１（以下、ミシン１という）は、図１及び図２に示すように、ミシン１の躯体となるミシンフレーム２を備え、このミシンフレーム２内には、ルーパ機構３が設けられている。
ミシンフレーム２は、金属材料から形成されており、内部にはミシンモータや下軸、駆動機構、ルーパ機構３を設けるための空間が形成されている。ミシンフレーム２のうち、針板の下方には、ルーパ機構３を設けるための空間が形成されている。この空間は周囲が壁面で仕切られており、潤滑油が飛散してもその壁面によりミシンフレーム２の外部には漏れないようになっており、この空間を強制給油領域Ａという。強制給油領域Ａにおいては、潤滑油が連続的に、大量に給油され、高速駆動部位や摺動部位を有する部品が配置される。 Hereinafter, the best mode of a chain stitch sewing machine according to the present invention will be described in detail with reference to the drawings.
<Configuration of chain stitch sewing machine>
As shown in FIGS. 1 and 2, the chain stitch sewing machine 1 (hereinafter referred to as a sewing machine 1) includes a sewing machine frame 2 that is a casing of the sewing machine 1, and a looper mechanism 3 is provided in the sewing machine frame 2. Yes.
The sewing machine frame 2 is made of a metal material, and a space for providing a sewing machine motor, a lower shaft, a drive mechanism, and a looper mechanism 3 is formed inside. In the sewing machine frame 2, a space for providing the looper mechanism 3 is formed below the needle plate. The space is partitioned by a wall surface, and even if lubricating oil scatters, the wall does not leak to the outside of the sewing machine frame 2, and this space is called a forced oiling region A. In the forced oil supply region A, a large amount of lubricating oil is continuously supplied, and components having a high-speed drive part and a sliding part are arranged.

ルーパ機構３は、図３に示すように、ミシンフレーム２内に設けられたミシンモータ（図示略）に連結された下軸３０が挿通され、止めネジ３２により下軸３０に取り付けられたエキセントリックルーパアボイド３１と、下軸３０が挿通され、ボルト３４によりエキセントリックルーパアボイド３１に取り付けられたルーパロッドアボイド３３と、を備えている。ルーパロッドアボイド３３には、ピンルーパアボイド３５が設けられ、このピンルーパアボイド３５は座金３７及びナット３８によりクランクルーパアボイド３６の一端に連結されている。クランクルーパアボイド３６は棒状の部材であり、その中央部には、ルーパ軸アボイド３９が挿通されている。ルーパ軸アボイド３９の両端には止め栓４０，４０が設けられ、ルーパ軸アボイド３９は、ブッシングルーパ４１、クランクルーパアボイド３６、Ｅリング４２、座金４３、ブッシングルーパ４４、止め栓４５の順に挿通された状態でクランクルーパアボイド３６に止めネジ４６にて取り付けられている。ルーパ軸アボイド３９は、ミシンフレーム２に取り付けられており、クランクルーパアボイド３６がルーパ軸アボイド３９を中心に回動するようになっている。   As shown in FIG. 3, the looper mechanism 3 includes an eccentric looper in which a lower shaft 30 connected to a sewing machine motor (not shown) provided in the sewing machine frame 2 is inserted and attached to the lower shaft 30 by a set screw 32. The void 31 is provided with a looper rod void 33 through which the lower shaft 30 is inserted and attached to the eccentric looper void 31 by a bolt 34. The looper rod void 33 is provided with a pin looper void 35, and the pin looper void 35 is connected to one end of the crank looper void 36 by a washer 37 and a nut 38. The crank looper void 36 is a rod-shaped member, and a looper shaft void 39 is inserted in the center thereof. Stopper plugs 40 and 40 are provided at both ends of the looper shaft void 39. The looper shaft void 39 is inserted through the bushing looper 41, the crank looper void 36, the E ring 42, the washer 43, the bushing looper 44, and the stopper plug 45 in this order. In this state, it is attached to the crank looper void 36 with a set screw 46. The looper shaft void 39 is attached to the sewing machine frame 2, and the crank looper void 36 rotates about the looper shaft void 39.

クランクルーパアボイド３６の他端には、ルーパアボイドピン５０が連結されている。ルーパアボイドピン５０の先端は球体に形成され、図５に示すように、上下方向に沿って溝５０ａが形成されている、また、球体形状の中心を貫通する長孔５０ｂが形成されており、この長孔５０ｂにルーパ軸５２の一端が挿通されている。ここで、長孔５０ｂが形成されているのは、クランクルーパアボイド３６が回動してルーパアボイドピン５０が揺動した際にルーパ軸５２の上下方向への動きをある程度許容するためである。ルーパアボイドピン５０の両側には、座金５１が設けられており、ルーパアボイドピン５０及び座金５１，５１に挿通されたルーパ軸５２はカラー５３、ナット５４、ネジ５５により、ルーパアボイドピン５０がルーパ軸５２から外れないように取り付けられている。
ルーパ軸５２のほぼ中央部には、駆動伝達部材５６から駆動が伝達される軸保持部５８が連結され、さらにブッシングルーパシャフト５９、オイルシール６０が挿通されている。そして、ルーパ軸５２の他端部には、ねじ８８により連動部材６１が連結されている。
ここで、連動部材６１の手前までの部品、すなわち、オイルシール６０までの部品は、ミシンフレーム２の内部に形成された強制給油領域Ａ内に設けられており、連動部材６１は強制給油領域Ａを仕切る壁面を隔ててミシンフレーム２の外部に配置されている。 A looper void pin 50 is connected to the other end of the crank looper void 36. The tip of the looper void pin 50 is formed in a sphere, and as shown in FIG. 5, a groove 50a is formed along the vertical direction, and a long hole 50b penetrating the center of the sphere is formed. One end of the looper shaft 52 is inserted into the long hole 50b. Here, the long hole 50b is formed in order to allow the looper shaft 52 to move to some extent when the crank looper void 36 rotates and the looper void pin 50 swings. A washer 51 is provided on both sides of the looper void pin 50. A looper shaft 52 inserted through the looper void pin 50 and the washers 51, 51 has a collar 53, a nut 54, and a screw 55. It is attached so as not to be detached from the shaft 52.
A shaft holding portion 58 to which drive is transmitted from the drive transmission member 56 is connected to a substantially central portion of the looper shaft 52, and a bushing looper shaft 59 and an oil seal 60 are inserted therethrough. The interlocking member 61 is connected to the other end of the looper shaft 52 by a screw 88.
Here, the parts up to the front of the interlocking member 61, that is, the parts up to the oil seal 60 are provided in the forced oiling area A formed in the sewing machine frame 2, and the interlocking member 61 is in the forced oiling area A. Is arranged outside the sewing machine frame 2 with a wall surface separating the two.

図４に示すように、連動部材６１の揺動方向となる左右両側には、上端でルーパ６４，６５を保持するルーパ保持部６２，６３が二つ設けられている。
連動部材６１の上端近傍には前方に突出するピン７０が設けられ、ルーパ保持部６２，６３には、ピン７０と同じ高さ位置にピン７１，７２が設けられている。
連動部材６１のピン７０には、軸受７３が挿通され、さらにその上に伝達部材７４の前後方向の位置を定める座金８９とともにネジ７５により伝達部材７４の中央部が連結されている。伝達部材７４は、軸受７３の軸方向の高さより若干薄く形成され、連動部材６１と座金８９との間で回動自在に保持されている。
ルーパ保持部６２のピン７１には、球軸受７６が挿通され、この球軸受７６を介して伝達部材７４の一端に連結されている。
ルーパ保持部６３のピン７２には、球軸受７７が挿通され、この球軸受７７を介して伝達部材７４の他端に連結されている。
ここで、球軸受７６，７７は、伝達部材７４の両端部にそれぞれ嵌め込まれており、ルーパ保持部６２，６３の部品精度にばらつきが生じてもそのずれを許容できるようになっている。 As shown in FIG. 4, two looper holding portions 62 and 63 that hold the loopers 64 and 65 at the upper ends are provided on both the left and right sides in the swinging direction of the interlocking member 61.
A pin 70 projecting forward is provided near the upper end of the interlocking member 61, and pins 71 and 72 are provided at the same height as the pin 70 in the looper holding portions 62 and 63.
A bearing 73 is inserted into the pin 70 of the interlocking member 61, and a central portion of the transmission member 74 is coupled to the pin 70 by a screw 75 together with a washer 89 that determines the position of the transmission member 74 in the front-rear direction. The transmission member 74 is formed to be slightly thinner than the axial height of the bearing 73, and is held rotatably between the interlocking member 61 and the washer 89.
A ball bearing 76 is inserted into the pin 71 of the looper holding portion 62, and is connected to one end of the transmission member 74 via the ball bearing 76.
A ball bearing 77 is inserted into the pin 72 of the looper holding portion 63 and is connected to the other end of the transmission member 74 via the ball bearing 77.
Here, the ball bearings 76 and 77 are fitted into both end portions of the transmission member 74, respectively, and even if variations occur in the component accuracy of the looper holding portions 62 and 63, the deviation can be allowed.

また、連動部材６１の下端近傍には前後方向に貫通する貫通孔７８が形成され、ルーパ保持部６２，６３には、貫通孔７８と同じ高さ位置に貫通孔７９，８０が形成されている。
連動部材６１の貫通孔７８には、ルーパ軸５２の一端が挿通されるとともに固定され、ルーパ軸５２の回動とともに連動部材６１も回動するようになっている。
ルーパ保持部６２の貫通孔７９には、ニードルベアリング８１とともに段ネジ８２が挿通されている。
ルーパ保持部６３の貫通孔８０には、ニードルベアリング８３とともに段ネジ８４が挿通されている。
ここで、ニードルベアリング８１，８３は、段ネジ８２，８４の軸方向への移動を許容し、軸回り方向への回動を規制するように構成されており、ルーパ軸５２の前後方向への往復移動により、ルーパ保持部６２，６３も同様に段ネジ８２，８４上をスライド移動できるようになっている。 Further, a through hole 78 penetrating in the front-rear direction is formed in the vicinity of the lower end of the interlocking member 61, and through holes 79 and 80 are formed in the looper holding portions 62 and 63 at the same height as the through hole 78. .
One end of the looper shaft 52 is inserted and fixed in the through hole 78 of the interlocking member 61, and the interlocking member 61 is also rotated as the looper shaft 52 is rotated.
A step screw 82 is inserted through the through hole 79 of the looper holding portion 62 together with the needle bearing 81.
A step screw 84 is inserted into the through hole 80 of the looper holding portion 63 together with the needle bearing 83.
Here, the needle bearings 81 and 83 are configured to allow movement of the stepped screws 82 and 84 in the axial direction and to restrict rotation in the direction around the axis, and to move the looper shaft 52 in the front-rear direction. By reciprocating movement, the looper holding portions 62 and 63 can slide on the step screws 82 and 84 in the same manner.

＜ルーパの動作＞
次に、ルーパの動作について説明する。
下軸３０が回転すると、図３に示すように、下軸３０の軸線に対して偏心した位置に取り付けられたルーパロッドアボイド３３は前後方向である矢印ａの方向に揺動する。ルーパロッドアボイド３３が矢印ａの方向に揺動すると、クランクルーパアボイド３６の一端は前後方向である矢印ｂの方向に揺動する。クランクルーパアボイド３６の一端が矢印ｂの方向に揺動すると、クランクルーパアボイド３６の他端が前後方向である矢印ｃの方向に揺動する。クランクルーパアボイド３６の他端が矢印ｃの方向に揺動すると、ルーパアボイドピン５０が前後方向である矢印ｄの方向に揺動する。ルーパアボイドピン５０が矢印ｄの方向に揺動すると、ルーパ軸５２が前後方向である矢印ｅの方向に往復移動し、ルーパ軸５２の一端に取り付けられた連動部材６１は前後方向である矢印ｆの方向に往復移動する。連動部材６１が矢印ｆの方向に往復移動することにより、連動部材６１と伝達部材７４で連結されたルーパ保持部６２，６３も矢印ｆの方向に往復移動し、ルーパ６４，６５も矢印ｆの方向に往復移動する。すなわち、ルーパ６４，６５を前後方向に往復移動させることができる。 <Operation of looper>
Next, the operation of the looper will be described.
When the lower shaft 30 rotates, as shown in FIG. 3, the looper rod void 33 attached at a position eccentric with respect to the axis of the lower shaft 30 swings in the direction of arrow a which is the front-rear direction. When the looper rod void 33 swings in the direction of arrow a, one end of the crank looper void 36 swings in the direction of arrow b which is the front-rear direction. When one end of the crank looper void 36 swings in the direction of arrow b, the other end of the crank looper void 36 swings in the direction of arrow c, which is the front-rear direction. When the other end of the crank looper void 36 swings in the direction of arrow c, the looper void pin 50 swings in the direction of arrow d, which is the front-rear direction. When the looper void pin 50 swings in the direction of arrow d, the looper shaft 52 reciprocates in the direction of arrow e, which is the front-rear direction, and the interlocking member 61 attached to one end of the looper shaft 52 moves in the direction of arrow f. Move back and forth in the direction of. When the interlocking member 61 reciprocates in the direction of the arrow f, the looper holding portions 62 and 63 connected by the interlocking member 61 and the transmission member 74 also reciprocate in the direction of the arrow f, and the loopers 64 and 65 also move in the direction of the arrow f. Move back and forth in the direction. That is, the loopers 64 and 65 can be reciprocated in the front-rear direction.

一方、駆動伝達部材５６がミシンモータや下軸３０等の駆動力により上下方向である矢印ｇの方向に往復移動すると、軸保持部５８はルーパ軸５２の軸回り方向である矢印ｈの方向に揺動する。軸保持部５８が矢印ｈの方向に揺動することにより、連動部材６１はルーパ軸５２を揺動軸とした左右方向である矢印ｉの方向に揺動する。連動部材６１が矢印ｉの方向に揺動することにより、連動部材６１と伝達部材７４で連結されたルーパ保持部６２，６３も矢印ｉの方向に往復移動し、ルーパ６４，６５も矢印ｉの方向に往復移動する。すなわち、ルーパ６４，６５を左右方向に揺動させることができる。   On the other hand, when the drive transmission member 56 reciprocates in the direction of the arrow g which is the vertical direction by the driving force of the sewing machine motor, the lower shaft 30 or the like, the shaft holding portion 58 moves in the direction of the arrow h which is the direction around the axis of the looper shaft 52. Swing. As the shaft holding portion 58 swings in the direction of arrow h, the interlocking member 61 swings in the direction of arrow i, which is the left-right direction with the looper shaft 52 as the swing axis. As the interlocking member 61 swings in the direction of the arrow i, the looper holding portions 62 and 63 connected by the interlocking member 61 and the transmission member 74 also reciprocate in the direction of the arrow i, and the loopers 64 and 65 also move in the direction of the arrow i. Move back and forth in the direction. That is, the loopers 64 and 65 can be swung in the left-right direction.

＜作用効果＞
実施形態によるミシン１によれば、ルーパ軸５２の駆動は連動部材６１に伝達され、連動部材６１の動作は伝達部材７４を介してルーパ保持部６２，６３に伝達され、ルーパ保持部６２，６３に設けられたルーパ６４，６５を前後左右に動作させることができる。このとき、各ルーパ保持部６２，６３は、それぞれの揺動中心から連動部材６１の揺動中心までの間隔が等しくなるように配置されているので、縫い針に通された縫い糸をすくうときの各ルーパ６４，６５の進入角度を等しくすることができるので、縫い目の乱れを防止し、縫製品質を向上させることができる。
また、ルーパ６４，６５付近の機構をルーパ軸５２の一端に集中させて配置することができるので、ルーパ軸５２の一端部だけをミシンフレーム２外部に配置し、一端部以外の部分をミシンフレーム２内部の強制給油領域Ａに配置しておけば、ルーパ軸５２の駆動に伴う他の部品との摺動部等には潤滑油が連続的に給油されるので、焼き付きを防止することができる。
また、ルーパ６４，６５の駆動に際しては、一つのルーパ軸５２でルーパ６４，６５の軸線方向への往復移動とルーパ６４，６５の軸回り方向への揺動が可能となるため、従来よりも簡単な機構で実現することができ、コスト低減を図ることができる。
従って、ルーパ６４，６５に係止される縫い糸を汚すことなく、給油を良好に行うことができ、ルーパ６４，６５の駆動の高速化を図ることができる。 <Effect>
According to the sewing machine 1 according to the embodiment, the drive of the looper shaft 52 is transmitted to the interlocking member 61, and the operation of the interlocking member 61 is transmitted to the looper holding portions 62 and 63 via the transmission member 74, and the looper holding portions 62 and 63. The loopers 64 and 65 provided on the front and rear can be moved back and forth and left and right. At this time, the looper holding portions 62 and 63 are arranged so that the distances from the respective swing centers to the swing center of the interlocking member 61 are equal, so that when the sewing thread passed through the sewing needle is scooped Since the approach angles of the loopers 64 and 65 can be made equal, the seam can be prevented from being disturbed and the quality of the sewing product can be improved.
Further, since the mechanism in the vicinity of the loopers 64 and 65 can be concentrated on one end of the looper shaft 52, only one end portion of the looper shaft 52 is disposed outside the sewing machine frame 2, and a portion other than the one end portion is formed on the sewing machine frame. If the oil is disposed in the forced oiling region A in the interior 2, the lubricating oil is continuously supplied to the sliding portion with other parts accompanying the driving of the looper shaft 52, so that seizure can be prevented. .
Further, when the loopers 64 and 65 are driven, the single looper shaft 52 can reciprocate the loopers 64 and 65 in the axial direction and swing the loopers 64 and 65 around the axis. This can be realized with a simple mechanism, and the cost can be reduced.
Therefore, it is possible to satisfactorily lubricate the sewing thread that is locked to the loopers 64 and 65 without making the sewing thread dirty, and to drive the loopers 64 and 65 at high speed.

また、各ルーパ保持部６２，６３は、球軸受７６，７７を介して伝達部材７４に連結されているので、各ルーパ保持部６２，６３が揺動又は前後移動するときの動きを円滑にすることができ、各ルーパ保持部６２，６３から伝達部材７４、連動部材６１の各連結部の部品精度にばらつきが生じても球軸受７６，７７が許容するため動作中の引っ掛かりや停止を防止することができる。   Moreover, since each looper holding | maintenance part 62 and 63 is connected with the transmission member 74 via the ball bearings 76 and 77, the movement when each looper holding | maintenance part 62 and 63 rock | fluctuates or moves back and forth is made smooth. Since the ball bearings 76 and 77 allow even if the component accuracy of each connecting portion of the transmission member 74 and the interlocking member 61 varies from the looper holding portions 62 and 63, it is possible to prevent catching and stopping during operation. be able to.

なお、本発明は上記実施形態に限られるものではない。例えば、ルーパ保持部に複数のルーパを設けてもよい。これにより、縫製のバリエーションを増加させることができ、縫製パターンの多様化にも対応させることができる。   The present invention is not limited to the above embodiment. For example, a plurality of loopers may be provided in the looper holding part. Thereby, the variation of sewing can be increased and it can respond also to diversification of a sewing pattern.

環縫いミシンの斜視図である。It is a perspective view of a chain stitch sewing machine. 図１における環縫いミシンのルーパ機構を拡大した斜視図である。FIG. 2 is an enlarged perspective view of a looper mechanism of the chain stitch sewing machine in FIG. 1. ルーパ機構の分解斜視図である。It is a disassembled perspective view of a looper mechanism. ルーパ機構の分解斜視図である。It is a disassembled perspective view of a looper mechanism. ルーパアボイドピンの拡大図である。It is an enlarged view of a looper void pin. 従来技術におけるルーパ機構の分解斜視図である。It is a disassembled perspective view of the looper mechanism in a prior art.

符号の説明Explanation of symbols

１ ミシン（環縫いミシン）
２ ミシンフレーム
５２ ルーパ軸
６１ 連動部材
６２ ルーパ保持部
６３ ルーパ保持部
６４ ルーパ
６５ ルーパ
７４ 伝達部材
７６ 球軸受
７７ 球軸受
Ａ 強制給油領域 1 Sewing machine (Chain stitch machine)
2 sewing machine frame 52 looper shaft 61 interlocking member 62 looper holding portion 63 looper holding portion 64 looper 65 looper 74 transmission member 76 ball bearing 77 ball bearing A forced oiling region

Claims (3)

ミシンフレームの内部において潤滑油が連続的に給油される強制給油領域に設けられ、軸線方向への往復移動及び軸回り方向への揺動が可能とされたルーパ軸と、
前記ミシンフレームの外部において前記ルーパ軸の一端に設けられ、前記ルーパ軸の動作に伴って動作する連動部材と、
それぞれが前記連動部材と同方向に揺動可能とされ、それぞれの揺動中心から前記連動部材の揺動中心までの間隔が等しくなるように配置された複数のルーパ保持部と、
前記連動部材と前記複数のルーパ保持部とを連結し、前記連動部材の動作を各ルーパ保持部に伝達する伝達部材と、
各ルーパ保持部の上端に設けられたルーパと、
を備えることを特徴とする環縫いミシン。 A looper shaft provided in a forced oiling region in which lubricating oil is continuously supplied inside the sewing machine frame, and capable of reciprocating in the axial direction and swinging in the direction around the shaft;
An interlocking member that is provided at one end of the looper shaft outside the sewing machine frame and that operates in accordance with the operation of the looper shaft;
A plurality of looper holding portions, each of which is swingable in the same direction as the interlocking member, and is arranged so that the distance from the swing center to the swing center of the interlocking member is equal;
A transmission member for connecting the interlocking member and the plurality of looper holding portions, and transmitting the operation of the interlocking member to each looper holding portion;
A looper provided at the upper end of each looper holding portion;
A chain stitch sewing machine characterized by comprising: 各ルーパ保持部は、球軸受を介して前記伝達部材に連結されていることを特徴とする請求項１に記載の環縫いミシン。   The chain stitch sewing machine according to claim 1, wherein each looper holding portion is connected to the transmission member via a ball bearing. 前記ルーパ保持部に複数のルーパを設けたことを特徴とする請求項１又は２に記載の環縫いミシン。   The chain stitch sewing machine according to claim 1, wherein a plurality of loopers are provided in the looper holding portion.
JP2005312954A 2005-10-27 2005-10-27 Chain stitch sewing machine Pending JP2007117366A (en)

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US11407608B2 (en) 2015-03-17 2022-08-09 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
US11008710B2 (en) 2017-09-11 2021-05-18 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11268243B2 (en) 2017-09-11 2022-03-08 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11180892B2 (en) 2017-09-11 2021-11-23 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11668051B2 (en) 2017-09-11 2023-06-06 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11008709B2 (en) 2017-09-11 2021-05-18 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US10947671B2 (en) 2017-09-11 2021-03-16 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11806890B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11806889B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11952722B2 (en) 2017-09-11 2024-04-09 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
CN115087772A (en) * 2019-12-17 2022-09-20 Pfaff工业***与机械有限公司 Stitch forming tool assembly for sewing system and sewing system with same
CN115087772B (en) * 2019-12-17 2024-01-26 Pfaff工业***与机械有限公司 Stitch forming tool assembly for sewing system and sewing system with same
US11952692B2 (en) 2019-12-17 2024-04-09 Pfaff Industriesysteme Und Maschinen Gmbh Stitch-forming tool assembly for a sewing system and sewing system having such an assembly

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