JP2005095314A - Thread take-up lever device for sewing machine - Google Patents
Thread take-up lever device for sewing machine Download PDFInfo
- Publication number
- JP2005095314A JP2005095314A JP2003331816A JP2003331816A JP2005095314A JP 2005095314 A JP2005095314 A JP 2005095314A JP 2003331816 A JP2003331816 A JP 2003331816A JP 2003331816 A JP2003331816 A JP 2003331816A JP 2005095314 A JP2005095314 A JP 2005095314A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- sewing machine
- thread take
- guide member
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
本発明は、ミシン主軸に同期して回転駆動されるディスク状の回転型天秤を有するミシンの天秤装置に関し、特に回転型天秤による糸取り曲線の位相を変更できるようにしたものに関する。 The present invention relates to a sewing machine balance device having a disk-shaped rotary balance that is driven to rotate in synchronization with a main spindle of the sewing machine, and more particularly to a device capable of changing the phase of a thread take-up curve by a rotary balance.
従来、鳩目穴かがりミシン、二重環縫いミシン、飾り縫いミシン等のようにルーパーを有するミシンには、一般的に、ミシン主軸に連動して回転する回転型天秤が設けられている。この回転型天秤の外周部には、糸供給源から繰り出された上糸を引き出したり、ルーパー糸を引き締めるための糸取り量調節カムが形成され、糸供給源から縫針に至る糸道経路の途中部において、糸供給源から繰り出された上糸の一部が、別途設けられた糸ガイド部材により、回転型天秤の糸取り量調節カムに接触するようになっており、回転型天秤による糸ガイド部材における糸取り量を調節可能になっている。 2. Description of the Related Art Conventionally, a sewing machine having a looper such as an eyelet perforated sewing machine, a double ring stitch sewing machine, or a decorative sewing machine is generally provided with a rotary balance that rotates in conjunction with a sewing machine main shaft. A thread take-up amount adjusting cam for pulling out the upper thread fed from the thread supply source or tightening the looper thread is formed on the outer peripheral portion of the rotary balance, and a middle portion of the yarn path from the thread supply source to the sewing needle is formed. , A part of the upper thread fed from the yarn supply source is brought into contact with the thread take-up amount adjusting cam of the rotary balance by a separately provided yarn guide member. The thread take-up amount can be adjusted.
ところで、加工布の種類や布厚、更には縫糸の種類や太さにより、縫い上がりの風合い（縫目の詰まり具合）が変わってしまうことが多い。そこで、回転型天秤の外周部に形成された糸取り量調節カムによる糸取り曲線の位相を、早めたり遅らせたり調節できるようにして、風合いの様相を任意に変更できるようにしたミシンの天秤装置が種々提案されている。 By the way, the texture of stitches (the degree of stitch clogging) often changes depending on the type and thickness of the work cloth, as well as the type and thickness of the sewing thread. Therefore, there are various sewing machine balance devices that can adjust the phase of the yarn take-up curve by the yarn take-up amount adjusting cam formed on the outer periphery of the rotary balance so that the phase of the texture can be changed arbitrarily. Proposed.
例えば、特公昭５９−３４３８５号公報に記載のミシンの天秤装置には、ミシンアーム部の内部に設けられた駆動軸の途中部に上糸カムを固着し、その上糸カムの上端近傍部に水平に設けられたカム台の上面に、上糸カムの両側に対応するように、１対のカム糸掛けが、駆動軸と直交する方向に位置調節可能にネジで取付けられている。 For example, in a sewing machine balance device described in Japanese Patent Publication No. 59-34385, an upper thread cam is fixed to a middle portion of a drive shaft provided inside a sewing machine arm portion, and is near the upper end portion of the upper thread cam. A pair of cam thread hooks are attached to the upper surface of a horizontally provided cam base so as to correspond to both sides of the upper thread cam with screws so that the position can be adjusted in a direction orthogonal to the drive shaft.
そこで、これらカム糸掛けの固定ネジを夫々緩めて、カム糸掛けを上糸カムに沿って、つまり駆動軸と直交方向に水平移動させることで、これらカム糸掛けで案内される針糸の上糸カムに対する接触位置が変更されるため、これら両カム糸掛け間における上糸カムによる糸取り量からなる糸取り曲線の位相を、カム糸掛けの移動量に応じて変更することができるようになっている（例えば、特許文献１）。 Therefore, by loosening the fixing screws of the cam thread hooks and moving the cam thread hook horizontally along the upper thread cam, that is, in the direction orthogonal to the drive shaft, Since the contact position with respect to the thread cam is changed, the phase of the thread take-up curve composed of the thread take-up amount by the upper thread cam between the two cam thread catches can be changed according to the movement amount of the cam thread catch. (For example, Patent Document 1).
前述したように、特公昭５９−３４３８５号公報に記載のミシンの天秤装置においては、水平に設けられたカム台の上面に、上糸カムの両側に対応するように設けられた１対のカム糸掛けを、カム台に沿って、つまり上糸カムの接線方向に移動するようになっているため、上糸カムによる糸取り量からなる糸取り曲線の位相を変更することができるが、これと同時に、上糸カムによる両カム糸掛け間における糸取り量が多くなったり、或いは少なくなったりして、変更されるようになる。 As described above, in the sewing machine balance device described in Japanese Patent Publication No. 59-34385, a pair of cams provided on the upper surface of a horizontal cam base so as to correspond to both sides of the upper thread cam. Since the thread hook is moved along the cam base, that is, in the tangential direction of the upper thread cam, the phase of the thread take-up curve consisting of the thread take-up amount by the upper thread cam can be changed. The thread take-up amount between both cam yarn hooks by the upper thread cam increases or decreases, and is changed.
そのため、縫い上がりの風合いを予想通りに容易に変更することができず、所望の風合いを呈するような仕上がり体裁が得られないという問題がある。更に、１対のカム糸掛けは上糸カムの両側に別体に構成され、しかも夫々ビス止めされているため、糸取り曲線の位相調節に際しては、これらカム糸掛けの移動量を等しくした移動操作が必要となるため、移動操作が複雑化し、しかも面倒である。 Therefore, there is a problem that the stitching texture cannot be easily changed as expected, and a finished appearance that exhibits a desired texture cannot be obtained. In addition, since the pair of cam thread hooks are configured separately on both sides of the upper thread cam and are screwed respectively, a moving operation in which the cam thread hooks are moved in equal amounts when adjusting the phase of the thread take-up curve. Therefore, the movement operation is complicated and troublesome.
請求項１のミシンの天秤装置は、アーム部内に設けられたミシン主軸と、そのミシン主軸の回転に同期して駆動される針棒駆動機構とを備えたミシンにおいて、ミシン主軸と一体又は別体に構成されミシン主軸と同期して回転するように回転駆動される駆動軸と、ディスク状で外周部に糸取り量調節カムを有し且つ駆動軸に相対回転不能に外嵌固着された回転型天秤と、駆動軸に回転可能に枢支され且つ駆動軸から所定距離離隔した位置に糸ガイドが形成された糸ガイド部材であって、糸供給源から供給される上糸を糸ガイドにより回転型天秤の糸取り量調節カムに係合させるように案内する糸ガイド部材と、糸ガイド部材を駆動軸を中心として回動させることで、糸ガイドを円周方向に位相調節可能な位相調節機構とを備えたものである。 A sewing machine balance apparatus according to claim 1, wherein the sewing machine includes a sewing machine main shaft provided in an arm portion and a needle bar driving mechanism driven in synchronization with rotation of the sewing machine main shaft. And a rotary shaft that has a disk-like shape and has a thread take-up amount adjusting cam on the outer peripheral portion thereof, and is externally fixed to the drive shaft so as not to rotate relative to the drive shaft. A yarn guide member rotatably supported by the drive shaft and having a yarn guide formed at a position separated from the drive shaft by a predetermined distance, wherein the upper thread supplied from the yarn supply source is A thread guide member for guiding the thread guide to be engaged with the thread take-up amount adjusting cam, and a phase adjusting mechanism capable of adjusting the phase of the thread guide in the circumferential direction by rotating the thread guide member about the drive shaft. It is a thing.
ミシン主軸と一体又は別体に構成され駆動軸はミシン主軸と同期して回転するように回転駆動され、その駆動軸に、ディスク状で外周部に糸取り量調節カムを有する回転型天秤が相対回転不能に外嵌固着されるとともに、駆動軸から所定距離離隔した位置に糸ガイドが形成された糸ガイド部材が駆動軸に回転可能に枢支されている。 The drive shaft is configured to be integrated with or separate from the sewing machine main shaft, and is driven to rotate in synchronization with the main shaft of the sewing machine. A rotary balance having a disk-like outer periphery and a thread take-up amount adjusting cam is rotated relative to the drive shaft. A thread guide member that is fixedly fitted to the outer periphery and is formed with a thread guide at a predetermined distance from the drive shaft is pivotally supported by the drive shaft.
それ故、糸供給源から供給される上糸が糸ガイド部材の糸ガイドにより、回転型天秤の糸取り量調節カムに係合させるように案内された状態で、回転型天秤が駆動軸と一体的に同期して回転する。そのため、糸ガイドで案内された上糸の糸取り量が、回転する回転型天秤の糸取り量調節カムにより変化する。 Therefore, the rotary balance is integrated with the drive shaft while the upper thread supplied from the thread supply source is guided by the thread guide of the thread guide member so as to be engaged with the thread take-up amount adjusting cam of the rotary balance. Rotate in sync with. Therefore, the thread take-up amount of the upper thread guided by the thread guide is changed by the thread take-up amount adjusting cam of the rotating rotary balance.
ところで、糸ガイド部材を駆動軸を中心として回動させる位相調節機構を備えているため、糸ガイドを駆動軸の円周方向に位相調節することにより、回転型天秤による糸取り量からなる糸取り曲線の位相を、糸取り量を変更することなく調節できる。 By the way, since the phase adjusting mechanism for rotating the thread guide member about the drive shaft is provided, the thread guide curve of the thread take-up amount by the rotary balance is adjusted by adjusting the phase of the thread guide in the circumferential direction of the drive shaft. The phase can be adjusted without changing the thread take-up amount.
ここで、前記位相調節機構が、ミシンフレーム側に固定された固定板と、糸ガイド部材と固定板の何れか一方に形成された湾曲状の切欠き部と、その切欠き部を通して糸ガイド部材と固定板の何れか他方のネジ穴に螺合してこれら糸ガイド部材と固定板とを締結可能な締結ボルトとを有する場合（請求項１に従属の請求項２）には、湾曲状の切欠き部内を締結ボルトが移動できるため、回転型天秤による糸取り量からなる糸取り曲線の位相を調節する場合、締結ボルトを緩めて糸ガイド部材を駆動軸を中心として固定板に対して回動させることができ、回動後の位置で締結ボルトを締めておく。 Here, the phase adjusting mechanism includes a fixing plate fixed to the sewing machine frame side, a curved notch portion formed on one of the yarn guide member and the fixing plate, and the thread guide member through the notch portion. And a fixing bolt that can be screwed into either one of the screw holes of the fixing plate and fasten the thread guide member and the fixing plate (claim 2 dependent on claim 1), Since the fastening bolt can move in the notch, when adjusting the phase of the thread take-up curve consisting of the thread take-up amount by the rotary balance, loosen the fastening bolt and rotate the thread guide member around the drive shaft with respect to the fixed plate The fastening bolt is tightened at the position after the rotation.
ここで、前記糸ガイド部材が、回転型天秤の両側に回転型天秤と離隔させて設けられた１対のガイド板からなり、これらガイド板はその一端部において一体的に連結されている場合（請求項１又は２に従属の請求項３）には、回転型天秤の両側に離隔状に配置された１対のガイド板の各々に糸ガイドを有し、これら糸ガイドが一体的に同期して駆動軸を中心として回動するので、回転型天秤による糸取り量からなる糸取り曲線の位相を確実に調節できる。 Here, the yarn guide member is composed of a pair of guide plates provided on both sides of the rotary balance so as to be separated from the rotary balance, and these guide plates are integrally connected at one end thereof ( In claim 3) dependent on claim 1 or 2, each of the pair of guide plates arranged on both sides of the rotary balance has a thread guide, and these thread guides are integrally synchronized. Therefore, the phase of the thread take-up curve composed of the thread take-up amount by the rotary balance can be adjusted with certainty.
ここで、前記位相調節機構が、糸ガイドを駆動軸を中心として回動させる電動アクチュエータを有する場合（請求項１〜３の何れかに従属の請求項４）には、電動アクチュエータを駆動させることにより、糸ガイドを駆動軸を中心として回動させることができ、回転型天秤による糸取り量からなる糸取り曲線の位相を調節できる。 Here, when the phase adjusting mechanism has an electric actuator that rotates the yarn guide about the drive shaft (Claim 4 dependent on any one of Claims 1 to 3), the electric actuator is driven. Thus, the yarn guide can be rotated about the drive shaft, and the phase of the yarn take-up curve formed by the yarn take-up amount by the rotary balance can be adjusted.
請求項１の発明によれば、アーム部内に設けられたミシン主軸と、そのミシン主軸の回転に同期して駆動される針棒駆動機構とを備えたミシンにおいて、駆動軸と、回転型天秤と、糸ガイド部材と、位相調節機構とを設けたので、位相調節機構により糸ガイド部材を駆動軸を中心として回動させて、糸ガイド部材の糸ガイドを駆動軸の円周方向に位相調節することにより、回転型天秤による糸取り量からなる糸取り曲線の位相を、糸取り量を変更することなく調節できるため、縫い上がりの風合い調節を容易に且つ迅速に行うことができる。更に、天秤装置に簡単な位相調節機構を設けただけなので、天秤装置を簡単な構成にすることができる。 According to the invention of claim 1, in a sewing machine including a sewing machine main shaft provided in the arm portion and a needle bar driving mechanism driven in synchronization with the rotation of the sewing machine main shaft, the driving shaft, the rotary balance, Since the yarn guide member and the phase adjustment mechanism are provided, the phase adjustment mechanism rotates the yarn guide member around the drive shaft to adjust the phase of the yarn guide of the yarn guide member in the circumferential direction of the drive shaft. As a result, the phase of the thread take-up curve formed by the thread take-up amount by the rotary balance can be adjusted without changing the thread take-up amount, so that the texture adjustment of the sewing can be easily and quickly performed. Furthermore, since the balance device is simply provided with a simple phase adjustment mechanism, the balance device can be configured simply.
請求項２の発明によれば、前記位相調節機構は、ミシンフレーム側に固定された固定板と、糸ガイド部材と固定板の何れか一方に形成された湾曲状の切欠き部と、その切欠き部を通して糸ガイド部材と固定板の何れか他方のネジ穴に螺合してこれら糸ガイド部材と固定板とを締結可能な締結ボルトとを有するので、回転型天秤による糸取り量からなる糸取り曲線の位相を調節する場合、締結ボルトを緩めて糸ガイド部材を駆動軸を中心として固定板に対して回動させることができ、糸取り曲線の位相調節の簡単化を図ることができ、しかも位相調節機構を簡単な構成にすることができる。その他請求項１と同様の効果を奏する。 According to the invention of claim 2, the phase adjusting mechanism includes a fixing plate fixed to the sewing machine frame side, a curved notch portion formed on one of the thread guide member and the fixing plate, and a notch thereof. Since it has a fastening bolt that can be screwed into the other screw hole of the thread guide member and the fixed plate through the notch and fasten the thread guide member and the fixed plate, the thread take-up curve consisting of the thread take-up amount by the rotary balance When adjusting the phase of the thread, it is possible to loosen the fastening bolt and rotate the thread guide member with respect to the fixed plate about the drive shaft, simplifying the phase adjustment of the thread take-up curve and adjusting the phase. The mechanism can have a simple configuration. Other effects similar to those of the first aspect are obtained.
請求項３の発明によれば、前記糸ガイド部材は、回転型天秤の両側に回転型天秤と離隔させて設けられた１対のガイド板からなり、これらガイド板はその一端部において一体的に連結されているので、回転型天秤の両側に離隔状に配置された１対のガイド板の各々に有する糸ガイドは、回転型天秤を挟んで両側に位置し、一体的に同期して駆動軸を中心として回動するため、回転型天秤による糸取り量からなる糸取り曲線の位相調節の確実性及び容易性を図ることができる。その他請求項１又は２と同様の効果を奏する。 According to the invention of claim 3, the yarn guide member is composed of a pair of guide plates provided on both sides of the rotary balance so as to be separated from the rotary balance, and these guide plates are integrally formed at one end thereof. Since they are connected, the thread guides on each of the pair of guide plates arranged on both sides of the rotary balance are located on both sides of the rotary balance, and are integrally and synchronously driven shafts. Therefore, the phase adjustment of the thread take-up curve consisting of the thread take-up amount by the rotary balance can be ensured and easy. Other effects similar to those of the first or second aspect are achieved.
請求項４の発明によれば、前記位相調節機構は、糸ガイドを駆動軸を中心として回動させる電動アクチュエータを有するので、その電動アクチュエータを駆動させることにより、糸ガイドを駆動軸を中心として回動させることができ、回転型天秤による糸取り量からなる糸取り曲線の位相調節の操作性の充実を図ることができる。その他請求項１〜３の何れかと同様の効果を奏する。 According to the invention of claim 4, since the phase adjusting mechanism has the electric actuator for rotating the yarn guide about the drive shaft, the yarn guide is rotated about the drive shaft by driving the electric actuator. Therefore, it is possible to enhance the operability of the phase adjustment of the thread take-up curve composed of the thread take-up amount by the rotary balance. Other effects similar to those of any one of claims 1 to 3 are provided.
本実施形態のミシンの天秤装置は、ルーパーを有する二重環縫いミシンのアーム部に設けられたミシン主軸の途中部に、ディスク状の回転型天秤を同心状に固着し、その回転型天秤の左右両側に設けた糸ガイド部材のガイド板をミシン主軸に回転可能に枢支し、その糸ガイド部材をミシン主軸を中心として回動可能にしてある。 In the sewing machine balance device of this embodiment, a disk-shaped rotary balance is concentrically fixed to the middle part of the main spindle provided in the arm portion of the double chain stitch sewing machine having a looper. The guide plates of the thread guide members provided on the left and right sides are pivotally supported on the sewing machine main shaft so that the thread guide members can be rotated about the sewing machine main shaft.
図１に示すように、二重環縫いミシン１のアーム部２の内部には、その長手方向向き（左右方向）にミシン主軸５（これがミシン主軸５と一体に構成された駆動軸に相当する）が配設され、ミシンフレーム１ａに装着したブッシュ６〜８により回転自在に枢支されている。ミシン主軸５の右端部には手動操作用のプーリ９が固着されるとともに、ミシン主軸５の左端部には針棒クランク１０が固着されている。ここで、ミシン主軸５は、図示外のミシンモータにより回転駆動されるようになっている。 As shown in FIG. 1, inside the arm portion 2 of the double chain stitch sewing machine 1, a sewing machine main shaft 5 (this corresponds to a drive shaft integrally formed with the sewing machine main shaft 5) in the longitudinal direction (left-right direction). ) And is rotatably supported by bushes 6 to 8 attached to the sewing machine frame 1a. A pulley 9 for manual operation is fixed to the right end portion of the sewing machine main shaft 5, and a needle bar crank 10 is fixed to the left end portion of the sewing machine main shaft 5. Here, the sewing machine spindle 5 is driven to rotate by a sewing machine motor (not shown).
次に、針棒上下動機構について説明すると、針棒クランク１０には、クランクロッド１１の一端部が回転自在に連結され、クランクロッド１１の他端部は針棒抱き１２に回転自在に連結されている。針棒抱き１２は針棒１３に固定され、針棒１３はミシンアーム部２のミシンフレーム１ａに装着したブッシュ１６，１９に上下動可能に支持され、針棒１３の下端には、縫針１４が着脱可能に固定されている。 Next, the needle bar vertical movement mechanism will be described. One end of the crank rod 11 is rotatably connected to the needle bar crank 10 and the other end of the crank rod 11 is rotatably connected to the needle bar holder 12. ing. The needle bar holder 12 is fixed to the needle bar 13, and the needle bar 13 is supported by bushes 16, 19 attached to the sewing machine frame 1 a of the sewing machine arm portion 2 so as to be movable up and down. It is detachably fixed.
図示外のミシンモータによりミシン主軸５が回転駆動されるので、ミシン主軸５の回転と同時に針棒クランク１０が回転し、クランクロッド１１と針棒抱き１２を介して針棒１３が上下駆動される。 Since the sewing machine main shaft 5 is rotationally driven by a sewing motor (not shown), the needle bar crank 10 is rotated simultaneously with the rotation of the sewing machine main shaft 5, and the needle bar 13 is driven up and down via the crank rod 11 and the needle bar holder 12. .
尚、ベッド部３には、針棒１３の上下動に調時して二重環縫目を形成するために、ルーパー１５を駆動するルーパー駆動機構が設けられているが、その詳細については省略するものとする。 The bed 3 is provided with a looper driving mechanism for driving the looper 15 in order to form a double ring stitch in time with the vertical movement of the needle bar 13, but details thereof are omitted. It shall be.
次に、アーム部２に設けられた天秤装置２０について説明する。
図１〜図３に示すように、ミシン主軸５の左端よりの部位に、ディスク状の回転型天秤２１がミシン主軸５に相対回転不能に外嵌固着されている。その回転型天秤２１の外周部の全体には、複数の凸部と凹部を連続的に組合せた糸取り量調節カム２１ａが形成されている。
Next, the balance apparatus 20 provided in the arm part 2 will be described.
As shown in FIGS. 1 to 3, a disk-shaped rotary balance 21 is externally fixed to the sewing machine main shaft 5 so as not to rotate relative to the portion from the left end of the sewing machine main shaft 5. A thread take-up amount adjusting cam 21a in which a plurality of convex portions and concave portions are continuously combined is formed on the entire outer peripheral portion of the rotary balance 21.
ところで、回転型天秤２１の左右両側から回転型天秤２１を挟むように糸ガイド部材２３が設けられ、ミシン主軸５に回転可能に枢支されている。この糸ガイド部材２３は、回転型天秤２１と離隔させて設けられた１対のガイド板２３ａ，２３ｂを一体的に連結させた正面視略Ｕ字状に構成され、その高さ方向中段部においてミシン主軸５に回転可能に枢支されている。各ガイド板２３ａ，２３ｂの上端近傍部には、糸供給源である糸駒１７から繰り出される上糸１８を案内する糸ガイド穴２３ｃ，２３ｄが夫々形成されている。 By the way, a thread guide member 23 is provided so as to sandwich the rotary balance 21 from both the left and right sides of the rotary balance 21 and is pivotally supported by the sewing machine main shaft 5. The yarn guide member 23 is configured in a substantially U shape in front view in which a pair of guide plates 23a and 23b provided separately from the rotary balance 21 is integrally connected. The sewing machine main shaft 5 is rotatably supported. In the vicinity of the upper ends of the guide plates 23a and 23b, thread guide holes 23c and 23d are formed, respectively, for guiding the upper thread 18 fed from the thread spool 17 that is a thread supply source.
それ故、糸駒１７から繰り出された上糸１８は、左右両側の糸ガイド穴２３ｃ，２３ｄと、アーム部２上の糸ガイド４等を経て、最終的に縫針１４の目穴を挿通している。このとき、図１、図３に示すように、上糸１８は、右側の糸ガイド穴２３ｃを挿通し、回転型天秤２１の糸取り量調節カム２１ａに上側から係合（接触）した後、左側の糸ガイド穴２３ｄを挿通している。 Therefore, the upper thread 18 fed out from the yarn spool 17 passes through the thread guide holes 23c and 23d on the left and right sides, the thread guide 4 on the arm portion 2, and the like, and finally passes through the eye hole of the sewing needle 14. Yes. At this time, as shown in FIGS. 1 and 3, the upper thread 18 is inserted through the right thread guide hole 23c and engaged (contacted) with the thread take-up amount adjusting cam 21a of the rotary balance 21 from the upper side. Thread guide hole 23d.
そこで、左右両糸ガイド穴２３ｃ，２３ｄ間の糸取り量は、これら糸ガイド穴２３ｃ，２３ｄの高さ位置に対する糸取り量調節カム２１ａのカム面の高さに応じて異なるため、ミシンモータによりミシン主軸５が回転されると、回転型天秤２１も同時に同期して回転するので、糸取り量からなる糸取り量曲線は、図４に実線で示すように、針棒１３の上下動と調時して変化する。 Therefore, the thread take-up amount between the left and right thread guide holes 23c and 23d differs depending on the height of the cam surface of the thread take-up amount adjusting cam 21a with respect to the height position of the thread guide holes 23c and 23d. When 5 is rotated, the rotary balance 21 also rotates simultaneously and synchronously, so that the thread take-up amount curve consisting of the thread take-up amount changes in time with the vertical movement of the needle bar 13, as shown by the solid line in FIG. To do.
次に、糸ガイド部材２３をミシン主軸５を中心として回動させることで、糸ガイド穴２３ｃ，２３ｄを円周方向に位相調節可能な位相調節機構２５について説明する。
糸ガイド部材２３の左側のガイド板２３ｂには、その高さ方向中段部において、ミシン主軸５の中心位置を中心とする円弧の一部である湾曲状の切欠き部２３ｅが所定範囲に亙って形成されている。
Next, the phase adjusting mechanism 25 capable of adjusting the phase of the yarn guide holes 23c and 23d in the circumferential direction by rotating the yarn guide member 23 around the sewing machine spindle 5 will be described.
In the guide plate 23b on the left side of the yarn guide member 23, a curved notch 23e, which is a part of an arc centered on the center position of the sewing machine main shaft 5, is located in a predetermined range in the middle step in the height direction. Is formed.
一方、糸ガイド部材２３の後側のミシンフレーム１ａに、前後方向に延びる固定板２６の後端部がビス２７により固定されるとともに、その固定板２６の前端部分において上向きに曲げ加工された垂直壁部２６ａが形成され、この垂直壁部２６ａが左ガイド板２３ｂの直ぐ右側に位置している。その垂直壁部２６ａにはネジ穴（図示略）が形成され、締結ボルト２８は左ガイド板２３ｂの切欠き部２３ｅを通して固定板２６のネジ穴に螺合することにより、これら糸ガイド部材２３と固定板２６とが締結ボルト２８により締結可能になっている。 On the other hand, the rear end portion of the fixing plate 26 extending in the front-rear direction is fixed to the sewing machine frame 1a on the rear side of the yarn guide member 23 by screws 27, and the vertical end is bent upward at the front end portion of the fixing plate 26. A wall portion 26a is formed, and the vertical wall portion 26a is located immediately on the right side of the left guide plate 23b. A screw hole (not shown) is formed in the vertical wall portion 26a, and the fastening bolt 28 is screwed into the screw hole of the fixing plate 26 through the notch portion 23e of the left guide plate 23b. The fixing plate 26 can be fastened by a fastening bolt 28.
次に、このように構成された天秤装置２０の作用及び効果について説明する。
糸駒１７から供給される上糸１８が糸ガイド部材２３の両糸ガイド穴２３ｃ，２３ｄにより、回転型天秤２１の糸取り量調節カム２１ａに係合させるように案内された状態で、ミシンモータにより回転型天秤２１がミシン主軸５と一体的に同期して回転する。そのため、図４に実線で示すように、両糸ガイド穴２３ｃ，２３ｄで案内された上糸１８の糸取り量が、回転する回転型天秤２１の糸取り量調節カム２１ａの形状に応じて変化する。
Next, the operation and effect of the balance device 20 configured as described above will be described.
The upper thread 18 supplied from the yarn spool 17 is guided by the sewing machine motor while being engaged with the thread take-up amount adjusting cam 21a of the rotary balance 21 by the both thread guide holes 23c and 23d of the thread guide member 23. The rotary balance 21 rotates in synchronization with the sewing machine main shaft 5 integrally. Therefore, as indicated by a solid line in FIG. 4, the thread take-up amount of the upper thread 18 guided by the both thread guide holes 23c and 23d varies depending on the shape of the thread take-up amount adjusting cam 21a of the rotating rotary balance 21.
ここで、加工布に形成する二重環縫目の風合いを変えるような場合、図２に示すように、締結ボルト２８を緩めて、糸ガイド部材２３を矢印Ｆ方向に回動操作し、締結ボルト２８を締め込む。この場合には、糸ガイド部材２３は２点鎖線で示す位置に回動した状態であるため、糸取り曲線は２点鎖線で示すように、糸取り位相を進ませる（早める）ことができる。 Here, when changing the texture of the double ring stitch formed on the work cloth, as shown in FIG. 2, the fastening bolt 28 is loosened and the thread guide member 23 is rotated in the direction of the arrow F to be fastened. The bolt 28 is tightened. In this case, since the yarn guide member 23 is rotated to the position indicated by the two-dot chain line, the thread take-up phase can be advanced (accelerated) as indicated by the two-dot chain line.
このように、糸取り位相を進ませた場合、二重環縫目の風合いは、引き締まった様相を呈することができる。但し、この場合、両糸ガイド穴２３ｃ，２３ｄを同期させてミシン主軸５を中心として回動させるため、糸取り量は変化していない。 In this way, when the thread take-up phase is advanced, the texture of the double ring stitch can exhibit a tightened aspect. However, in this case, since both thread guide holes 23c and 23d are synchronized and rotated about the sewing machine main shaft 5, the thread take-up amount does not change.
一方、締結ボルト２８を緩めて、糸ガイド部材２３を矢印Ｂ方向に回動操作し、締結ボルト２８を締め込む。この場合には、糸ガイド部材２３は１点鎖線で示す位置に回動した状態であるため、糸取り曲線は１点鎖線で示すように、糸取り位相を遅らせることができる。 On the other hand, the fastening bolt 28 is loosened, the thread guide member 23 is rotated in the direction of arrow B, and the fastening bolt 28 is tightened. In this case, since the thread guide member 23 is rotated to the position indicated by the one-dot chain line, the thread take-up phase can be delayed as shown by the one-dot chain line in the thread take-up curve.
このように、糸取り位相を遅らせた場合、二重環縫目の風合いは、ふわっとした様相を呈することができる。但し、この場合にも、両糸ガイド穴２３ｃ，２３ｄを同期させてミシン主軸５を中心として回動させるため、糸取り量は変化していない。 Thus, when the thread take-up phase is delayed, the texture of the double ring stitch can exhibit a soft appearance. However, in this case as well, the thread take-up amount does not change because both the thread guide holes 23c and 23d are synchronized and rotated around the sewing machine main shaft 5.
このように、ディスク状で外周部に糸取り量調節カム２１ａを有し且つミシン主軸５に相対回転不能に外嵌固着された回転型天秤２１と、ミシン主軸５に回転可能に枢支され且つミシン主軸５から離隔した位置に糸ガイド穴２３ｃ，２３ｄが形成された糸ガイド部材２３であって、糸駒１７から供給される上糸１８を糸ガイド穴２３ｃ，２３ｄにより回転型天秤２１の糸取り量調節カム２１ａに係合させるように案内する糸ガイド部材２３と、糸ガイド部材２３をミシン主軸５を中心として回動させることで、糸ガイド穴２３ｃ，２３ｄを円周方向に位相調節可能な位相調節機構２５とを備えたので、位相調節機構２５により糸ガイド部材２３をミシン主軸５を中心として回動させて、糸ガイド部材２３の糸ガイド穴２３ｃ，２３ｄをミシン主軸５の円周方向に位相調節することにより、回転型天秤２１による糸取り量からなる糸取り曲線の位相を、糸取り量を変更することなく調節できるため、縫い上がりの風合い調節を容易に且つ迅速に行える。 As described above, the rotary balance 21 having a disk-like shape having the thread take-up amount adjusting cam 21a on the outer peripheral portion and fixedly fitted to the sewing machine main shaft 5 so as not to rotate relative to the sewing machine main shaft 5 is rotatably supported by the sewing machine main shaft 5 and the sewing machine. A thread guide member 23 having thread guide holes 23c and 23d formed at positions separated from the main shaft 5. The upper thread 18 supplied from the thread spool 17 is threaded by the rotary balance 21 through the thread guide holes 23c and 23d. A thread guide member 23 that is guided so as to be engaged with the adjustment cam 21a, and a phase in which the thread guide holes 23c and 23d can be adjusted in the circumferential direction by rotating the thread guide member 23 about the sewing machine main shaft 5. Since the adjusting mechanism 25 is provided, the thread guide member 23 is rotated about the sewing machine main shaft 5 by the phase adjusting mechanism 25, and the thread guide holes 23c and 23d of the thread guide member 23 are moved to the sewing machine. By adjusting the phase in the circumferential direction of the shaft 5, the phase of the thread take-up curve formed by the thread take-up amount by the rotary balance 21 can be adjusted without changing the thread take-up amount. Yes.
更に、天秤装置２０に簡単な位相調節機構２５を設けただけなので、天秤装置２０を簡単な構成にすることができる。 Furthermore, since the balance device 20 is simply provided with the simple phase adjustment mechanism 25, the balance device 20 can be configured simply.
また、位相調節機構２５は、ミシンフレーム１ａに固定された固定板２６と、糸ガイド部材２３に形成された湾曲状の切欠き部２３ｅと、その切欠き部２３ｅを通して固定板２６のネジ穴に螺合してこれら糸ガイド部材２３と固定板２６とを締結可能な締結ボルト２８とを有するので、回転型天秤２１による糸取り量からなる糸取り曲線の位相を調節する場合、締結ボルト２８を緩めて糸ガイド部材２３をミシン主軸５を中心として固定板２６に対して回動させることができ、糸取り曲線の位相調節の簡単化を図ることができ、しかも位相調節機構２５を簡単な構成にすることができる。 Further, the phase adjusting mechanism 25 has a fixing plate 26 fixed to the sewing machine frame 1a, a curved notch 23e formed in the thread guide member 23, and a screw hole of the fixing plate 26 through the notch 23e. Since there is a fastening bolt 28 that can be screwed to fasten the thread guide member 23 and the fixing plate 26, when adjusting the phase of the thread take-up curve formed by the thread take-up amount by the rotary balance 21, the fastening bolt 28 is loosened. The thread guide member 23 can be rotated with respect to the fixed plate 26 about the sewing machine spindle 5, the phase adjustment of the thread take-up curve can be simplified, and the phase adjustment mechanism 25 can be configured simply. Can do.
また、糸ガイド部材２３は、回転型天秤２１の両側に回転型天秤２１と離隔させて設けられた１対のガイド板２３ａ，２３ｂからなり、これらガイド板２３ａ，２３ｂはその一端部において一体的に連結されているので、回転型天秤２１の両側に離隔状に配置された１対のガイド板２３ａ，２３ｂの各々に有する糸ガイド穴２３ｃ，２３ｄは、回転型天秤２１を挟んで両側に位置し、一体的に同期してミシン主軸５を中心として回動するため、回転型天秤２１による糸取り量からなる糸取り曲線の位相調節の確実性及び容易性を図ることができる。 The yarn guide member 23 includes a pair of guide plates 23a and 23b provided on both sides of the rotary balance 21 so as to be separated from the rotary balance 21, and the guide plates 23a and 23b are integrally formed at one end thereof. The thread guide holes 23c and 23d of each of the pair of guide plates 23a and 23b arranged on both sides of the rotary balance 21 are positioned on both sides of the rotary balance 21. In addition, since it rotates around the main spindle 5 in synchronism with each other, the phase adjustment of the thread take-up curve composed of the thread take-up amount by the rotary balance 21 can be ensured and easy.
次に、前記実施形態を部分的に変更した変更形態について説明する。
１〕図５に示すように、天秤装置２０Ａの位相調節機構２５Ａは、糸ガイド穴２３ｃ，２３ｄをミシン主軸５を中心として回動させる電動アクチュエータを有するように構成してもよい。即ち、ミシン主軸５に回転可能に枢支された糸ガイド部材２３Ａの下端部に、円弧状のセクタギヤ３１を固着し、ステッピングモータからなる位相調節用モータ３２の駆動軸３２ａに取付けた駆動ギヤ３３をセクタギヤ３１に噛合させる。
Next, a modified embodiment in which the embodiment is partially modified will be described.
1] As shown in FIG. 5, the phase adjusting mechanism 25A of the balance device 20A may be configured to have an electric actuator that rotates the thread guide holes 23c and 23d around the sewing machine main shaft 5. In other words, the arcuate sector gear 31 is fixed to the lower end portion of the thread guide member 23A rotatably supported by the sewing machine main shaft 5, and the drive gear 33 is attached to the drive shaft 32a of the phase adjusting motor 32 formed of a stepping motor. Is engaged with the sector gear 31.
それ故、位相調節用モータ３２を正回転又は逆回転させると、駆動ギヤ３３とセクタギヤ３１の噛合を介して、糸ガイド部材２３Ａを前記実施形態と同様に回動させることができるため、両糸ガイド穴２３ｃ，２３ｄが同期してミシン主軸５を中心として回動するため、糸取り曲線の位相を調節することができる。この場合には、回転型天秤２１による糸取り量からなる糸取り曲線の位相調節の操作性の充実を図ることができる。 Therefore, when the phase adjusting motor 32 is rotated forward or backward, the yarn guide member 23A can be rotated through the meshing of the drive gear 33 and the sector gear 31, as in the above embodiment. Since the guide holes 23c and 23d rotate in synchronization with the main spindle 5 of the sewing machine, the phase of the thread take-up curve can be adjusted. In this case, it is possible to enhance the operability of the phase adjustment of the thread take-up curve formed by the thread take-up amount by the rotary balance 21.
この場合、縫製する加工布の種類や厚さ、縫糸の種類や太さ、更には縫目の風合いをパラメータとして位相調節用モータ３２の駆動量を対応させてテーブル化して、位相調節制御装置に記憶させておき、縫製に供する加工布の種類と厚さ及び縫糸の種類や太さ、更には縫目の風合いを入力するだけで、位相調節制御装置により、位相調節テーブルから読込んだ駆動量に基づいて位相調節用モータ３２を駆動させるように構成してもよい。 In this case, the type and thickness of the work cloth to be sewn, the type and thickness of the sewing thread, and the texture of the stitches are used as parameters, and the drive amount of the phase adjustment motor 32 is made into a table corresponding to the phase adjustment control device. The amount of drive read from the phase adjustment table by the phase adjustment controller just by inputting the type and thickness of the work cloth used for sewing, the type and thickness of the sewing thread, and the texture of the stitches. The phase adjustment motor 32 may be driven based on the above.
２〕図６に示すように、天秤装置２０Ｂの糸ガイド部材２３Ｂは、ミシン主軸５に外嵌固着された回転型天秤２１に対して両側に設けられた１対のガイド板２３ｆ，２３ｇを連結したものであるが、右側のガイド板２３ｆはミシン主軸５に支持されず、左側のガイド板２３ｇだけにより、片持ち状に支持されている。しかも、左側のガイド板２３ｇには、斜め下方及び後方に湾曲状に延びる連結部２３ｈが形成されている。各ガイド板２３ｆ，２３ｇには、上糸１８を回転型天秤２１に係合させるように案内する糸ガイド穴２３ｊ，２３ｋが夫々形成されている。 2] As shown in FIG. 6, the yarn guide member 23B of the balance device 20B connects a pair of guide plates 23f and 23g provided on both sides to the rotary balance 21 that is externally fitted and fixed to the sewing machine main shaft 5. However, the right guide plate 23f is not supported by the sewing machine main shaft 5, but is supported in a cantilever manner only by the left guide plate 23g. In addition, the left guide plate 23g is formed with a connecting portion 23h extending in a curved shape obliquely downward and rearward. Thread guide holes 23j and 23k for guiding the upper thread 18 to engage with the rotary balance 21 are formed in the guide plates 23f and 23g, respectively.
締結ボルト２８Ａが、連結部２３ｈに形成した湾曲状の切欠き部２３ｉを通して、ミシンフレーム１ａに固着された固定板２６Ａの前端部に形成されたネジ穴に螺合され、これら糸ガイド部材２３Ｂと固定板２６Ａとが締結ボルト２８Ａで締結されている。この場合にも、締結ボルト２８Ａを緩めて、糸ガイド部材２３Ｂをミシン主軸５を中心として回動させることで、糸ガイド穴２３ｊ，２３ｋを周方向に位相調節することができる。 The fastening bolt 28A is screwed into a screw hole formed in the front end portion of the fixing plate 26A fixed to the sewing machine frame 1a through a curved notch portion 23i formed in the connecting portion 23h, and the thread guide member 23B. The fixing plate 26A is fastened with fastening bolts 28A. Also in this case, the phase of the thread guide holes 23j and 23k can be adjusted in the circumferential direction by loosening the fastening bolt 28A and rotating the thread guide member 23B about the sewing machine main shaft 5.
３〕ミシン主軸５と別体に構成され、ミシン主軸５によりミシン主軸５の２倍の回転速度で回転される駆動軸を設け、この駆動軸に回転型天秤２１を外嵌固着するとともに、糸ガイド部材２３を回転可能に支持するように構成してもよい。但し、回転型天秤２１の外周部には、半周毎に糸取り量調節カム２１ａが形成されているものとする。 3] A drive shaft that is configured separately from the sewing machine main shaft 5 and that is rotated by the sewing machine main shaft 5 at twice the rotational speed of the sewing machine main shaft 5 is provided, and the rotary balance 21 is externally fixed to the drive shaft. You may comprise so that the guide member 23 may be supported rotatably. However, the thread take-up amount adjusting cam 21a is formed on the outer peripheral portion of the rotary balance 21 every half circumference.
４〕前記実施形態に関し、既存の技術や当業者に自明の技術に基いて種々の変更を加えることもあり得る。 4] Various modifications may be made to the embodiment based on existing techniques or techniques obvious to those skilled in the art.
５〕本案は、鳩目穴かがり縫目を形成する鳩目穴かがりミシン、飾り縫いミシン等、ルーパーを有する各種のミシンの天秤装置に本発明を適用し得ることは勿論である。 5) Needless to say, the present invention can be applied to various kinds of sewing machine balance devices having loopers such as an eyelet sewing machine for forming an eyelet stitching machine, a decorative sewing machine, and the like.
１ 二重環縫いミシン
１ａ ミシンフレーム
５ ミシン主軸
２１ 回転型天秤
２１ａ 糸取り量調節カム
２３ 糸ガイド部材
２３Ａ 糸ガイド部材
２３Ｂ 糸ガイド部材
２３ａ ガイド板
２３ｂ ガイド板
２３ｃ 糸ガイド穴
２３ｄ 糸ガイド穴
２３ｅ 切欠き部
２３ｆ ガイド板
２３ｇ ガイド板
２３ｉ 切欠き部
２３ｊ 糸ガイド穴
２３ｋ 糸ガイド穴
２５ 位相調節機構
２５Ａ 位相調節機構
２６ 固定板
２６Ａ 固定板
２８ 締結ボルト
２８Ａ 締結ボルト
３２ 位相調節用モータ
DESCRIPTION OF SYMBOLS 1 Double chain stitch sewing machine 1a Sewing machine frame 5 Sewing machine spindle 21 Rotary balance 21a Thread take-up adjustment cam 23 Thread guide member 23A Thread guide member 23B Thread guide member 23a Guide plate 23b Guide plate 23c Thread guide hole 23d Thread guide hole 23e Notch Portion 23f guide plate 23g guide plate 23i notch portion 23j thread guide hole 23k thread guide hole 25 phase adjusting mechanism 25A phase adjusting mechanism 26 fixing plate 26A fixing plate 28 fastening bolt 28A fastening bolt 32 phase adjusting motor
Claims (4)
前記ミシン主軸と一体又は別体に構成されミシン主軸と同期して回転するように回転駆動される駆動軸と、
ディスク状で外周部に糸取り量調節カムを有し且つ前記駆動軸に相対回転不能に外嵌固着された回転型天秤と、
前記駆動軸に回転可能に枢支され且つ駆動軸から所定距離離隔した位置に糸ガイドが形成された糸ガイド部材であって、糸供給源から供給される上糸を糸ガイドにより回転型天秤の糸取り量調節カムに係合させるように案内する糸ガイド部材と、
前記糸ガイド部材を駆動軸を中心として回動させることで、前記糸ガイドを円周方向に位相調節可能な位相調節機構と、
を備えたことを特徴とするミシンの天秤装置。 In a sewing machine including a sewing machine main shaft provided in the arm portion and a needle bar driving mechanism driven in synchronization with the rotation of the sewing machine main shaft,
A drive shaft that is configured integrally or separately with the sewing machine main shaft and is driven to rotate in synchronization with the sewing machine main shaft;
A rotary balance having a disk shape and a thread take-up amount adjusting cam on the outer peripheral portion and externally fixed to the drive shaft so as not to be relatively rotatable;
A yarn guide member rotatably supported by the drive shaft and having a yarn guide formed at a position spaced apart from the drive shaft by a predetermined distance, wherein an upper yarn supplied from a yarn supply source is fed to the rotary balance by the yarn guide. A thread guide member for guiding the thread take-up amount adjusting cam to engage with the thread take-up amount adjusting cam;
A phase adjusting mechanism capable of adjusting the phase of the yarn guide in a circumferential direction by rotating the yarn guide member about a drive shaft;
A sewing machine balance device characterized by comprising:
The sewing machine balance apparatus according to any one of claims 1 to 3, wherein the phase adjusting mechanism includes an electric actuator that rotates the yarn guide about a drive shaft.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003331816A JP2005095314A (en) | 2003-09-24 | 2003-09-24 | Thread take-up lever device for sewing machine |
| CN 200410078755 CN1600933B (en) | 2003-09-24 | 2004-09-16 | Thread ram means of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003331816A JP2005095314A (en) | 2003-09-24 | 2003-09-24 | Thread take-up lever device for sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2005095314A true JP2005095314A (en) | 2005-04-14 |
Family
ID=34460361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003331816A Pending JP2005095314A (en) | 2003-09-24 | 2003-09-24 | Thread take-up lever device for sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005095314A (en) |
| CN (1) | CN1600933B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061225A (en) * | 2004-08-25 | 2006-03-09 | Brother Ind Ltd | Rotating thread take-up device for sewing machine |
| JP5740140B2 (en) * | 2010-11-16 | 2015-06-24 | Juki株式会社 | sewing machine |
| CN103726238B (en) * | 2013-12-27 | 2015-12-30 | 吴江市震宇缝制设备有限公司 | A kind of Angle-adjustable take-up-lever |
| CN103866499A (en) * | 2014-03-10 | 2014-06-18 | 新杰克缝纫机股份有限公司 | Solid wire bonding cam device for sewing machine |
| CN107938191B (en) * | 2017-12-22 | 2023-02-03 | 浙江中捷缝纫科技有限公司 | Thread passing mechanism of sewing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19912291C1 (en) * | 1999-03-19 | 2000-07-13 | Duerkopp Adler Ag | Upper thread feed for a buttonhole sewing machine has a cam to tense and release the upper thread in a simple mechanism for alternate single and double chain stitching |
-
2003
- 2003-09-24 JP JP2003331816A patent/JP2005095314A/en active Pending
-
2004
- 2004-09-16 CN CN 200410078755 patent/CN1600933B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1600933A (en) | 2005-03-30 |
| CN1600933B (en) | 2010-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7966956B2 (en) | Multi-head embroidery sewing machine | |
| US9624611B2 (en) | Sewing machine | |
| JP2010194235A (en) | Sewing machine | |
| JP4822247B2 (en) | Sewing width adjusting device for sewing machine | |
| JP5048287B2 (en) | Full rotation pot | |
| JP2005095314A (en) | Thread take-up lever device for sewing machine | |
| JP2006230729A (en) | Hemstitching sewing machine | |
| JP2005334234A (en) | Cylinder type valance stitch sewing machine | |
| JP2001137584A (en) | Buttonhole sewing machine | |
| JP2008086561A (en) | Embroidery machine and zigzag sewing method for flat tape | |
| JPH11276736A (en) | Buttonhole darning sewing machine | |
| JPH06170074A (en) | Needle thread tension controller of embroidery sewing machine | |
| JP2019055188A (en) | Method for operating sewing machine and sewing machine adapted to the same | |
| JPH08131678A (en) | Walking sewing machine | |
| KR20030001332A (en) | Embroidery machines and methods of controlling the same | |
| JP2006061605A (en) | Rotating thread take-up device of sewing machine | |
| JP5089120B2 (en) | Full rotary hook of sewing machine | |
| JP3864877B2 (en) | Staggered sewing machine | |
| JP2008212400A (en) | Sewing machine | |
| JP2006087812A (en) | Sewing machine | |
| JP2009055966A (en) | Sewing machine | |
| JP2006061594A (en) | Sewing machine | |
| JP2004113431A (en) | Sewing machine | |
| US11668034B2 (en) | Sewing machine | |
| JP2007135675A (en) | Sewing machine |