JP3425054B2 - sewing machine - Google Patents

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】 本発明は、糸輪捕捉用釜を
取付けた釜軸と糸輪捕捉用釜を回転駆動する駆動手段の
駆動軸とを、相互の位相関係を保持しつつ釜軸を軸方向
に移動可能にカップリングで連結するようにしたものに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shuttle shaft having a shuttle shaft to which a thread catcher is attached and a drive shaft of a drive means for rotationally driving the shuttle to catch the shuttle shaft while maintaining a mutual phase relationship. The present invention relates to an axially movable coupling.

【０００２】[0002]

【従来の技術】 従来、通常のミシンのミシン本体は、
ベッド部と脚柱部とアーム部及びヘッド部とを主体とし
て構成され、アーム部内にミシンモータで駆動される主
軸が配設され、ヘッド部の針棒と縫針と天秤とが主軸の
駆動力で昇降駆動される。また、ベッド部内には釜軸
（下軸）と、縫針と協働する糸輪捕捉用釜とが配設さ
れ、釜軸も主軸からの駆動力で回転駆動するように主軸
連動型に構成されている。即ち、縫針と糸輪捕捉用釜と
を同期駆動させる必要から、従来のミシンでは糸輪捕捉
用釜を取付けた釜軸も主軸で駆動するように構成してあ
る。2. Description of the Related Art Conventionally, a sewing machine body of a normal sewing machine is
Mainly composed of a bed, a pillar, an arm and a head, a main shaft driven by a sewing machine motor is arranged in the arm, and a needle bar, a sewing needle and a balance of the head are driven by the main shaft. It is driven up and down. Further, a shuttle shaft (lower shaft) and a spool for catching a thread wheel that cooperates with the sewing needle are arranged in the bed portion, and the shuttle shaft is also configured as a spindle-interlocking type so as to be rotationally driven by the driving force from the spindle. ing. That is, since it is necessary to drive the sewing needle and the hook for catching the thread wheel in synchronization, the conventional sewing machine is configured so that the hook shaft to which the hook for catching the thread wheel is attached is also driven by the main shaft.

【０００３】ここで、糸輪捕捉用釜を主軸に連動させて
駆動する主軸連動型のミシンにおいて、ユーザーの要望
により、縫針と剣先との隙間寸法である針隙を縫製条件
に応じて変更するために、糸輪捕捉用釜を釜軸に固定す
る取付けビスを緩めたときには、糸輪捕捉用釜の出合い
位置と針隙との両方が調整不良になることから、主軸を
回転させて縫針を所定の出合い位置に移動させておき、
調整用ゲージを用いて或いは目視により、その剣先が縫
針に出合う出合い位置を精度良く調整するのと同時に、
剣先と縫針との針隙を精度良く調整した状態で、糸輪捕
捉用釜を取付けビスで釜軸に取付けるようになってい
る。Here, in a spindle-interlocking-type sewing machine that drives a thread catcher hook in conjunction with the spindle, the needle gap, which is the gap between the needle and the tip of the needle, is changed according to the sewing conditions according to the user's request. For this reason, when the attachment screw that fixes the thread catcher to the shuttle shaft is loosened, both the mating position and the needle gap of the shuttle for the thread catcher will be misaligned, so rotate the main shaft to remove the sewing needle. Move it to the predetermined meeting position,
At the same time as adjusting the encounter position where the tip of the sword comes into contact with the sewing needle with precision using an adjustment gauge or visually,
With the needle gap between the sword tip and the sewing needle adjusted accurately, the thread catcher hook is attached to the hook shaft with the attaching screw.

【０００４】ところで、糸輪捕捉用釜を専用の駆動モー
タで主軸とは独立に駆動することにより、糸輪捕捉用釜
を主軸に同期駆動させつつ、縫製条件に応じて糸輪捕捉
用釜の時々刻々の回転状態を制御することができる。そ
こで、例えば、特開昭６０─２１７５０号公報には、縫
針を駆動する針駆動モータと、糸輪捕捉用釜を駆動する
釜駆動モータとを設け、縫針と糸輪捕捉用釜とが同期作
動するように針駆動モータと釜駆動モータとを同期制御
し、一連の縫目を形成するようにした釜軸独立駆動型の
ミシンが提案されている。By the way, by driving the threadwheel catching hook by a dedicated drive motor independently of the main shaft, the threadwheel catching hook is driven synchronously with the main shaft and the threadwheel catching hook of the threadwheel catching hook is driven according to the sewing conditions. It is possible to control the momentary rotation state. Therefore, for example, in Japanese Unexamined Patent Publication No. Sho 60-21750, a needle drive motor for driving a sewing needle and a hook drive motor for driving a thread catcher are provided, and the sewing needle and the thread catch hook operate synchronously. A sewing machine of a shuttle shaft independent drive type has been proposed in which the needle drive motor and the shuttle drive motor are synchronously controlled to form a series of stitches.

【０００５】即ち、釜軸独立駆動型のミシンにおいても
同様に、針隙を縫製条件に応じて変更する場合には、前
述した主軸連動型のミシンと同様に、糸輪捕捉用釜の取
付けビスを緩めてから、調整用ゲージを用いて或いは目
視により、出合い位置と針隙とを同時に調整してから糸
輪捕捉用釜を釜軸に取付けるようになる。That is, also in the case of the hook shaft independent drive type sewing machine, when the needle gap is changed according to the sewing conditions, as in the case of the above-described main spindle interlocking type sewing machine, the thread holding hook mounting screw is attached. After loosening the needle, the thread catching hook is attached to the hook shaft by adjusting the encounter position and the needle gap at the same time by using an adjusting gauge or visually.

【０００６】[0006]

【発明が解決しようとする課題】 前述したように、糸
輪捕捉用釜を主軸に連動させて駆動する主軸連動型のミ
シンにおいては、縫針の出合い位置に対する糸輪捕捉用
釜の出合い位置を常に所定の位相関係となるように糸輪
捕捉用釜を釜軸に取付ける必要性があることから、針隙
を変更する場合に、糸輪捕捉用釜を釜軸に固着する取付
けビスを緩めるときには、糸輪捕捉用釜の出合い位置と
針隙の両方が調整不良になることから、糸輪捕捉用釜を
釜軸に固着するときには、これら出合い位置と針隙の調
整を行うことになり、調整作業が複雑化し且つ多大の調
整作業時間を要するという問題がある。As described above, in the sewing machine of the spindle-interlocking type that drives the thread catcher hook by interlocking it with the spindle, the position of the thread catcher for the thread catcher is always set relative to the position of the needle. the loop taker so as to have a predetermined phase relationship it is necessary properties to be attached to the hook shaft, when changing the Harisuki, when, loosen the bolts and mounting screws for fixing the loop taker in the shuttle shaft In this case, both the contact position and the needle gap of the thread catcher will be misadjusted.Therefore, when the thread catcher is fixed to the shuttle shaft, it is necessary to adjust the contact position and the needle clearance. Therefore, there is a problem that the adjustment work becomes complicated and a large amount of adjustment work time is required.

【０００７】更に、糸輪捕捉用釜をミシンモータとは異
なる専用の駆動モータで独立に駆動する釜軸独立駆動型
のミシンにおいても同様に、針隙を変更する場合には、
これら出合い位置と針隙の調整を行うことになり、調整
作業が複雑化し且つ多大の調整作業時間を要するという
問題がある。本発明の目的は、糸輪捕捉用釜の剣先と縫
針との出合い位置を変更することなく、剣先と縫針との
隙間寸法である針隙だけを簡単に調節できるようにした
ものに関する。Further, in the case of a hook shaft independent drive type sewing machine in which the thread catcher hook is independently driven by a dedicated drive motor different from the sewing machine motor, when changing the needle gap,
The adjustment of the encounter position and the needle gap causes the adjustment work to be complicated and requires a large amount of adjustment work time. It is an object of the present invention to easily adjust only a needle gap, which is a gap between a sword tip and a sewing needle, without changing an encounter position between the sword tip and the sewing needle of a hook for catching a thread wheel.

【０００８】[0008]

【課題を解決するための手段】 請求項１のミシンは、
ミシンモータで主軸を介して駆動される縫針と、縫針と
協働して糸輪を捕捉する糸輪捕捉用釜と、糸輪捕捉用釜
を回転駆動する駆動手段とを備えたミシンにおいて、糸
輪捕捉用釜に取付けられた釜軸と駆動手段の駆動軸とを
連結するカップリングを設け、このカ ップリングは、駆
動軸に取付けられ軸方向に平行な駆動力出力部を有する
第１連結部材と、釜軸に取付けられ軸方向に平行な駆動
力入力部を有する第２連結部材と、これら駆動力出力部
と駆動力入力部との間に挟着される硬質ゴム製の緩衝部
材とを備え、釜軸の位相と駆動軸の位相にズレを生じる
ことなく釜軸を駆動軸に対して軸方向移動可能で且つ駆
動力を伝達可能に連結するものである。Means for Solving the Problems A sewing machine according to claim 1 is
A sewing machine including a sewing needle driven by a sewing machine motor via a main shaft, a thread wheel catching hook that cooperates with the sewing needle to catch a thread wheel, and a drive unit that rotationally drives the thread wheel catching hook. a coupling for connecting the drive shaft of the hook shaft and the driving means mounted on wheels catcher provided, the mosquito Ppuringu is driving
It has a driving force output part that is attached to the drive shaft and is parallel to the axial direction.
Drive that is attached to the first connecting member and the shuttle shaft and is parallel to the axial direction
Second connecting member having force input portion and driving force output portion thereof
Cushioning part made of hard rubber sandwiched between the drive force input part and
And a material for connecting the hook shaft to the drive shaft so that the phase of the hook shaft and the phase of the drive shaft are not displaced from each other and the drive shaft can be moved in the axial direction.

【０００９】糸輪捕捉用釜に取付けられた釜軸と、駆動
手段の駆動軸とはカップリングで連結されるが、このカ
ップリングにより、釜軸の位相と駆動軸の位相にズレを
生じることなく釜軸を駆動軸に対して軸方向移動可能で
且つ駆動力を伝達可能に連結される。即ち、糸輪捕捉用
釜の剣先の出合い位置と縫針の出合い位置とに位相ズレ
を生じることなく、剣先と縫針との隙間寸法である針隙
だけを調節できるので、出合い位置を調整することな
く、針隙調整の簡単化を図ることができる。The shuttle shaft attached to the shuttle for catching the yarn wheel and the drive shaft of the drive means are connected by a coupling, and this coupling causes a phase difference between the shuttle shaft and the drive shaft. Instead, the shuttle shaft is coupled to the drive shaft so that the shuttle shaft can be moved in the axial direction and the driving force can be transmitted. That is, the needle gap, which is the gap between the sword tip and the sewing needle, can be adjusted without causing a phase difference between the sword tip encounter position and the sewing needle encounter position of the shuttle for catching the thread ring, so that there is no need to adjust the encounter position. It is possible to simplify the needle gap adjustment.

【００１０】[0010]

【００１１】このカップリングは、駆動軸に取付けられ
た第１連結部材と、釜軸に取付けられた第２連結部材
と、硬質ゴム製の緩衝部材とからなり、第１連結部材の
軸方向に平行な駆動力出力部と第２連結部材の軸方向に
平行な駆動力入力部とが対向し且つこれら駆動力出力部
と駆動力入力部との間に硬質ゴム製の緩衝部材が挟着さ
れているので、カップリングを簡単な構造にできる上、
駆動力出力部からの駆動力を緩衝部材を介して駆動力入
力部に伝達しながら、対向状の駆動力出力部と駆動力入
力部とにより、釜軸の位相と駆動軸の位相にズレを生じ
ることなく釜軸を駆動軸に対して軸方向に移動させるこ
とができる。更に、その緩衝部材により、糸輪捕捉用釜
の急激な負荷変動を緩和させることができ、またこれら
出力部と入力部とが直接接触しないことから、これらの
接触音の発生を防止することができる。 This coupling is composed of a first connecting member attached to the drive shaft, a second connecting member attached to the shuttle shaft, and a cushioning member made of hard rubber, and is arranged in the axial direction of the first connecting member. The parallel driving force output section and the driving force input section parallel to the axial direction of the second connecting member face each other, and a cushioning member made of hard rubber is sandwiched between the driving force output section and the driving force input section. Since it has a simple structure,
While transmitting the driving force from the driving force output unit to the driving force input unit via the buffer member, the driving force output unit and the driving force input unit which are opposed to each other shift the phase of the shuttle shaft from the phase of the driving shaft. The shuttle shaft can be moved in the axial direction with respect to the drive shaft without occurring. Further, the cushioning member can alleviate a sudden load fluctuation of the loop for catching the yarn wheel, and since the output section and the input section do not come into direct contact with each other, it is possible to prevent the generation of these contact sounds. I can .

【００１２】請求項２のミシンは、請求項１の発明にお
いて、前記釜軸と駆動軸の何れか一方を他方に取付けら
れた第１又は第２連結部材の軸穴に嵌入させることによ
って釜軸と駆動軸とを同心状に連結したものである。こ
の場合には、釜軸と駆動軸の何れか一方を他方に取付け
られた第１又は第２連結部材の軸穴に嵌入させることに
よって釜軸と駆動軸とを同心状に連結したので、カップ
リングによる駆動力伝達性能を損なうことがない。その
他、請求項１と同様の作用を奏する。According to a second aspect of the present invention, in the first aspect of the present invention, one of the shuttle shaft and the drive shaft is fitted into the shaft hole of the first or second connecting member attached to the other and the shuttle shaft is inserted. And the drive shaft are concentrically connected. In this case, since one of the shuttle shaft and the drive shaft is fitted into the shaft hole of the first or second connecting member attached to the other, the shuttle shaft and the drive shaft are concentrically connected to each other. The driving force transmission performance of the ring is not impaired. Other than that, the same operation as in claim 1 is achieved.

【００１３】請求項３のミシンは、請求項１の発明にお
いて、前記第１連結部材には、駆動軸心を中心とする略
半円形状の第１外側面と、その第１外側面と駆動軸心を
挟むように駆動軸心を中心とする略半円形状の第１内側
面とが設けられ、前記第２連結部材には、第１外側面と
係合するために釜軸心を中心とする略半円形状の第２内
側面と、第１内側面と係合するために釜軸心を中心とす
る略半円形状の第２外側面とが設けられ、これらの係合
によって釜軸と駆動軸とを同心状に連結したものであ
る。A sewing machine according to a third aspect of the present invention is the sewing machine according to the first aspect of the present invention, wherein the first connecting member has a substantially semicircular first outer surface having a drive shaft center as a center, and the first outer surface and the first outer surface. A first inner side surface having a substantially semicircular shape centered on the drive shaft center is provided so as to sandwich the shaft center, and the second connecting member is centered on the shuttle shaft center for engaging with the first outer surface. Is provided with a second semi-circular inner side surface and a second semi-circular outer surface centered on the shuttle shaft center for engaging the first inner surface. The shaft and the drive shaft are concentrically connected.

【００１４】この場合には、第１連結部材に設けた第１
外側面と第２連結部材に設けた第２内側面とが係合し、
また第１連結部材に設けた第１内側面と第２連結部材に
設けた第２外側面とが係合することから、釜軸心が駆動
軸の軸心に対してズレたり、或いは傾いたりした場合で
も、これら１対の内側面と外側面との面係合により、こ
れら釜軸と駆動軸とを同心状に連結することができ、ま
たこれら両連結部材の摩耗を抑制してその耐久性を向上
できる。その他、請求項１と同様の作用を奏する。In this case, the first connecting member is provided on the first connecting member.
The outer side surface and the second inner side surface provided on the second connecting member engage with each other,
Further, since the first inner side surface provided on the first connecting member and the second outer side surface provided on the second connecting member are engaged with each other, the shuttle shaft center is displaced or tilted with respect to the drive shaft axis. In this case, the hook shaft and the drive shaft can be concentrically connected to each other by the surface engagement between the pair of inner side surfaces and the outer side surface, and the wear of these both connecting members can be suppressed to endure them. You can improve the property. Other than that, the same operation as in claim 1 is achieved.

【００１５】請求項４のミシンは、請求項２または３の
発明において、前記糸輪捕捉用釜を取付けた釜軸を軸方
向に位置調節する位置調節手段を備えたものである。作
用について説明すると、位置調節手段により、糸輪捕捉
用釜を取付けた釜軸を軸方向に簡単に位置調節すること
ができる。その他、請求項２または３と同様の作用を奏
する。A sewing machine according to a fourth aspect of the present invention is the sewing machine according to the second or third aspect of the invention, further comprising position adjusting means for axially adjusting the position of the hook shaft to which the thread catching hook is attached. Describing the operation, the position adjusting means allows the position of the shuttle shaft to which the thread catcher is attached to be easily adjusted in the axial direction. Other than that, the same operation as in claim 2 or 3 is achieved.

【００１６】請求項５のミシンは、請求項４の発明にお
いて、前記駆動手段は、ミシンモータとは独立の電動モ
ータで糸輪捕捉用釜を駆動するように構成されたもので
ある。この場合、駆動手段において、ミシンモータとは
独立の電動モータで糸輪捕捉用釜を駆動するので、糸輪
捕捉用釜をミシンモータに連結させて駆動する連結駆動
機構を省略でき、駆動手段を、例えば釜モジュールのよ
うに着脱可能な小型のユニットに構成することができ
る。その他、請求項４と同様の作用を奏する。A sewing machine according to a fifth aspect of the present invention is the sewing machine according to the fourth aspect of the invention, wherein the driving means is configured to drive the thread catcher hook by an electric motor independent of the sewing machine motor. In this case, in the drive means, the thread wheel catching hook is driven by an electric motor independent of the sewing machine motor, so that a connecting drive mechanism for connecting the thread wheel catching hook to the sewing machine motor for driving can be omitted, and the driving means can be provided. For example, it can be configured as a detachable small unit such as a hook module. Other than that, the same operation as in claim 4 is achieved.

【００１７】[0017]

【００１８】[0018]

【００１９】[0019]

【発明の実施の形態】 以下、本発明の実施形態につい
て、図面に基づいて説明する。本実施形態は、３台の刺
繍ミシンを備え、各刺繍ミシンにおいては、糸輪捕捉用
の全回転釜を、ミシンモータとは独立に釜駆動モータで
回転駆動するようにした多頭型刺繍ミシンに本発明を適
用した場合のものである。この多頭型刺繍ミシンＭにつ
いて説明すると、図１に示すように、左右方向に延びる
ベースフレーム１の上面の後部側には、左右方向に所定
長さを有する平面視略矩形状のミシン支持板２が配設さ
れ、このミシン支持板２の後端部分には、左右方向に延
びる支持フレーム３が立設され、この支持フレーム３
に、３つのヘッド部４〜６が所定間隔毎に左右方向に並
設されるとともに、ミシン支持板２の前端部に位置する
ベースフレーム１には、これらヘッド部４〜６の各々に
対応させて、独立構造のユニットとして構成されたシリ
ンダ状のベッドユニット７〜９の各後端部が夫々支持さ
れている。Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a multi-head embroidery sewing machine including three embroidery sewing machines, and in each of the embroidery sewing machines, all rotary hooks for catching the thread ring are rotationally driven by a hook drive motor independently of the sewing machine motor. This is a case where the present invention is applied. The multi-head embroidery sewing machine M will be described. As shown in FIG. 1, a sewing machine support plate 2 having a predetermined length in the left-right direction and having a predetermined length in the left-right direction is provided on the rear side of the upper surface of a base frame 1 extending in the left-right direction. And a support frame 3 extending in the left-right direction is erected at the rear end portion of the sewing machine support plate 2.
In addition, the three head portions 4 to 6 are juxtaposed in the left-right direction at predetermined intervals, and the base frame 1 located at the front end portion of the sewing machine support plate 2 corresponds to each of the head portions 4 to 6. The respective rear ends of the cylindrical bed units 7 to 9 configured as independent units are respectively supported.

【００２０】即ち、ベースフレーム１上には、へッド部
４とベッドユニット７とを備えた多針式刺繍ミシンＭ１
と、へッド部５とベッドユニット８とを備えた多針式刺
繍ミシンＭ２と、へッド部６とベッドユニット９とを備
えた多針式刺繍ミシンＭ３とが並設されている。これら
刺繍ミシンＭ１〜Ｍ３のヘッド部４〜６の各々の前端部
には、左右方向に１列状に配列された１２本の針棒１０
を上下動可能に支持するとともに、１２個の天秤１２を
揺動可能に支持する針棒ケース１３が左右方向移動可能
に夫々取付けられ、各針棒ケース１３は、針棒変更機構
を介して針棒変更モータ（図示略）で一斉に左右方向に
移動されて、刺繍縫いの糸色を同時に変更可能になって
いる。That is, a multi-needle type embroidery sewing machine M1 having a head portion 4 and a bed unit 7 on the base frame 1.
A multi-needle type embroidery sewing machine M2 including the head portion 5 and the bed unit 8 and a multi-needle type embroidery sewing machine M3 including the head portion 6 and the bed unit 9 are arranged in parallel. Each of the head portions 4 to 6 of the embroidery sewing machines M1 to M3 has twelve needle bars 10 arranged in a row in the left-right direction at the front end portions thereof.
And a needle bar case 13 for supporting the twelve balances 12 in a swingable manner. The needle bar cases 13 are attached so as to be movable in the left-right direction, and each needle bar case 13 has a needle bar changing mechanism. The rod change motor (not shown) is moved in the left-right direction all at once, so that the thread colors for embroidery sewing can be changed at the same time.

【００２１】また、ミシン支持板２の前側でベッドユニ
ット７〜９の上面と同一高さになるように、作業用テー
ブル１５が水平に配設され、この作業用テーブル１５を
含み、この作業用テーブル１５の左右両側に設けられた
１対の補助テーブル１６・１７に亙って、左右方向に延
びる平面視矩形枠状の可動枠１８が載置され、この可動
枠１８は図示外のＸ軸駆動機構でＸ軸方向（左右方向）
に移動駆動されるとともに、Ｙ軸駆動機構でＹ軸方向
（前後方向）に移動駆動される。ここで、各刺繍ミシン
Ｍ１〜Ｍ３毎に設けられ、針棒１０を上下駆動する針棒
上下駆動機構、天秤１２を上下駆動する天秤駆動機構に
ついては、通常の刺繍ミシンと同様であり、これらの機
構はミシンモータ（図示略）で駆動されるミシン主軸を
介して駆動されるものであり、その説明を省略する。Further, a work table 15 is horizontally arranged so as to be flush with the upper surfaces of the bed units 7 to 9 on the front side of the sewing machine support plate 2, and the work table 15 is included in the work table 15. A movable frame 18 having a rectangular frame shape in a plan view extending in the left-right direction is placed over a pair of auxiliary tables 16 and 17 provided on both left and right sides of the table 15, and the movable frame 18 is not shown in the drawings. Drive mechanism in X-axis direction (left-right direction)
It is driven to move in the Y-axis direction (front-back direction) by the Y-axis drive mechanism. Here, the needle bar up-and-down drive mechanism that is provided for each embroidery sewing machine M1 to M3 and that vertically drives the needle bar 10, and the balance drive mechanism that vertically drives the balance 12 are the same as those of a normal embroidery sewing machine. The mechanism is driven via a sewing machine main shaft driven by a sewing machine motor (not shown), and a description thereof will be omitted.

【００２２】次に、ベッドユニット７〜９について、図
２〜図４に基づいて説明する。ここで、３つのベッドユ
ニット７〜９は同様の構成なので、左端のベッドユニッ
ト７について説明する。前後方向に延びる断面略Ｕ字状
のベッドケース２０は、その後端部において、ミシン支
持板２の前端部に固着した１対の支持ブラケット２１に
取付けられ、ベッドケース２０の前端部分には、ユニッ
トとして構成された釜モジュール３０が着脱可能に固定
されている。ここで、ベッドケース２０の上側は、その
前端部分において、針板２２で覆われるとともに、針板
２２に連続するカバー板２３で覆われている。Next, the bed units 7 to 9 will be described with reference to FIGS. Since the three bed units 7 to 9 have the same configuration, the leftmost bed unit 7 will be described. A bed case 20 having a substantially U-shaped cross section that extends in the front-rear direction is attached at its rear end portion to a pair of support brackets 21 fixed to the front end portion of the sewing machine support plate 2, and a unit at the front end portion of the bed case 20. The hook module 30 configured as is detachably fixed. Here, the upper side of the bed case 20 is covered with the needle plate 22 at the front end portion thereof, and is also covered with the cover plate 23 continuous with the needle plate 22.

【００２３】次に、釜モジュール３０について説明す
る。図３〜図４に示すように、ベッドケース２０の前端
部には、取付けブロック３１がビス３２により着脱可能
に固着され、この取付けブロック３１の後端側には、パ
ルスモータからなる釜駆動モータ３３が取付けられてい
る。一方、取付けブロック３１の前端側には、糸輪捕捉
用の全回転釜３４が設けられ、この全回転釜３４に固着
されて後方に延びる釜軸３５は、前後方向（軸方向）に
位置調節可能に取付けブロック３１に枢支されている。Next, the shuttle module 30 will be described. As shown in FIGS. 3 to 4, a mounting block 31 is detachably fixed to the front end portion of the bed case 20 with screws 32, and a shuttle drive motor composed of a pulse motor is provided on the rear end side of the mounting block 31. 33 is attached. On the other hand, on the front end side of the mounting block 31, a full rotary hook 34 for catching the yarn wheel is provided, and the rotary hook shaft 35 fixed to the full rotary hook 34 and extending rearward is positionally adjusted in the front-rear direction (axial direction). Possibly pivoted on the mounting block 31.

【００２４】そして、釜軸３５の後端部と、釜駆動モー
タ３３の駆動軸３３ａとはカップリング４０で連結され
ている。次に、このカップリング４０について説明する
と、図３〜図５に示すように、駆動軸３３ａに取付けら
れた第１連結部材４１と、釜軸３５に取付けられた第２
連結部材４２と、これら両連結部材４１，４２に挟着さ
れた緩衝部材４３とで構成されている。The rear end of the shuttle shaft 35 and the drive shaft 33a of the shuttle drive motor 33 are connected by a coupling 40. Next, the coupling 40 will be described. As shown in FIGS. 3 to 5, the first connecting member 41 attached to the drive shaft 33 a and the second connecting member 41 attached to the shuttle shaft 35.
The connecting member 42 and the cushioning member 43 sandwiched between the connecting members 41 and 42 are provided.

【００２５】即ち、図５に示すように、第１連結部材４
１には、その軸穴４１ｂの外側に略半円形状で軸方向に
平行な駆動力出力部４１ａが、前方突出状に形成される
とともに、第２連結部材４２には、その軸穴の外側に略
半円形状で軸方向に平行な駆動力入力部４２ａが後方突
出状に且つ駆動力出力部４１ａに対向状に形成されてい
る。そして、これら出力部４１ａと入力部４２ａとの間
には、硬質ゴム製の緩衝部材４３が挟着されている。更
に、釜軸３５は、第２連結部材４２と緩衝部材４３とを
挿通し、第１連結部材４１の軸穴４１ｂに嵌入され、こ
れら釜軸３５と駆動軸３３ａとは同心状に連結されてい
る。That is, as shown in FIG. 5, the first connecting member 4
1, a driving force output portion 41a having a substantially semicircular shape and parallel to the axial direction is formed on the outside of the shaft hole 41b so as to project forward, and the second connecting member 42 is provided on the outside of the shaft hole. Further, a driving force input portion 42a having a substantially semicircular shape and parallel to the axial direction is formed so as to project rearward and face the driving force output portion 41a. A buffer member 43 made of hard rubber is sandwiched between the output unit 41a and the input unit 42a. Further, the shuttle shaft 35 is inserted into the shaft hole 41b of the first connecting member 41 by inserting the second connecting member 42 and the buffer member 43, and the shuttle shaft 35 and the drive shaft 33a are connected concentrically. There is.

【００２６】ここで、全回転釜３４について簡単に説明
すると、図６に示すように、下糸ボビンを収容するボビ
ンケース３６を保持する内釜と、この内釜の外側を回転
する外釜３４ａとからなり、その外釜３４ａには、上糸
２５を引っかけて上糸ループ２５ｃを形成する為の剣先
３４ｂが形成されている。そして、主軸の位相が約「１
９０°」のときに、剣先３４ｂと縫針１１の目孔とが出
合う出合いタイミングとなり、剣先３４ｂはこの出合い
タイミングのときに、縫針１１の目孔から延びる針側の
上糸２５を引っかけて、外釜３４ａの回転により、内釜
と外釜３４ａとの間を移動する上糸ループ２５ｃを形成
する。そして、下糸ボビンから延びる下糸２６と上糸２
５とが絡むことで縫目が形成される。Here, the full-rotary hook 34 will be briefly described. As shown in FIG. 6, the inner hook holding the bobbin case 36 for accommodating the lower thread bobbin and the outer hook 34a for rotating the outer side of the inner hook. The outer hook 34a is formed with a sword tip 34b for hooking the upper thread 25 to form an upper thread loop 25c. And the phase of the main axis is about "1.
When the angle is 90 °, the sword tip 34b and the eyelet of the sewing needle 11 come into contact with each other. The rotation of the shuttle 34a forms an upper thread loop 25c that moves between the inner shuttle and the outer shuttle 34a. Then, the lower thread 26 and the upper thread 2 extending from the lower thread bobbin
The seams are formed by the entanglement with 5 and.

【００２７】更に、その第１連結部材４１の後端部に
は、複数のスリットが放射状に形成された円形のディス
クエンコーダ４４（エンコーダ部材に相当する）が同心
状に取付けられている。一方、発光部４５ａと受光部４
５ｂとを対向状に有する光学センサからなるエンコーダ
センサ４５が、そのディスクエンコーダ４４の一端部に
臨むように取付けブロック３１に取付けられている。そ
して、釜駆動モータ３３の駆動により、駆動軸３３ａと
カップリング４０とを介して釜軸３５が回転駆動され、
全回転釜３４が所定の回転方向に、ミシン主軸に対して
２倍の回転速度で回転駆動されるときに、エンコーダセ
ンサ４５から釜駆動モータ３３のモータ基準位置信号
と、クロックパルス信号とからなるエンコーダ信号が出
力される。ここで、ベッドユニット７の前端部は、ベッ
ドケース２０の前端部の下端にヒンジ機構を介して開閉
可能に枢支された保護カバー４６で覆われている。Further, a circular disk encoder 44 (corresponding to an encoder member) having a plurality of slits radially formed is concentrically attached to the rear end portion of the first connecting member 41. On the other hand, the light emitting unit 45a and the light receiving unit 4
An encoder sensor 45, which is an optical sensor having 5b facing each other, is attached to the attachment block 31 so as to face one end of the disc encoder 44. The shuttle drive motor 33 drives the shuttle shaft 35 to rotate via the drive shaft 33a and the coupling 40.
When the full rotary hook 34 is rotationally driven in a predetermined rotation direction at a rotation speed twice as high as the sewing machine spindle, the encoder sensor 45 includes a motor reference position signal of the hook drive motor 33 and a clock pulse signal. The encoder signal is output. Here, the front end of the bed unit 7 is covered with a protective cover 46 that is pivotally supported at the lower end of the front end of the bed case 20 via a hinge mechanism so as to be openable and closable.

【００２８】図３〜図４、図７に示すように、取付けブ
ロック３１の円筒壁部３１ａの内側には、円筒状のベア
リングケース４７が前後方向に摺動可能に設けられ、こ
のベアリングケース４７内には、釜軸３５を回転可能に
支持するベアリング４８が前方から圧入されている。こ
れにより、全回転釜３４に取付けられた釜軸３５が、ベ
アリングケース４７のベアリング４８により、回転可能
に支持されている。次に、釜軸３５を前後方向（軸方
向）に位置調節する位置調節機構５０（位置調節手段に
相当する）について説明する。As shown in FIGS. 3 to 4 and 7, a cylindrical bearing case 47 is provided inside the cylindrical wall portion 31a of the mounting block 31 so as to be slidable in the front-rear direction. A bearing 48 that rotatably supports the shuttle shaft 35 is press-fitted therein. As a result, the shuttle shaft 35 attached to the full-rotation shuttle 34 is rotatably supported by the bearing 48 of the bearing case 47. Next, the position adjusting mechanism 50 (corresponding to position adjusting means) for adjusting the position of the shuttle shaft 35 in the front-rear direction (axial direction) will be described.

【００２９】図３、図７に示すように、取付けブロック
３１の円筒壁部３１ａの左側面に形成されたピン穴３１
ｂには、偏心ピン５１が回転可能に設けられるととも
に、その偏心ピン５１の先端の偏心ピン部５１ａがベア
リングケース４７の外周部に形成された上下に細長いピ
ン穴４７ａに係合している。一方、円筒壁部３１ａの右
側面には、ベアリングケース４７を固定解除可能なセッ
トビス５２が螺着されている。即ち、セットビス５２を
緩める一方、偏心ピン５１を時計回り方向又は反時計回
り方向に回転させることにより、偏心ピン部５１ａとピ
ン穴４７ａとの係合を介して、ベアリングケース４７を
前方又は後方に、つまり軸方向に微小距離（例えば、１
〜２mm）だけ移動でき、同時に釜軸３５を介して全回転
釜３４の位置を前後方向に微調節できることから、縫針
１１と剣先３４ｂとの隙間寸法である針隙を簡単に調節
することができる。As shown in FIGS. 3 and 7, the pin hole 31 formed on the left side surface of the cylindrical wall portion 31a of the mounting block 31.
An eccentric pin 51 is rotatably provided at b, and an eccentric pin portion 51a at the tip of the eccentric pin 51 engages with a vertically elongated pin hole 47a formed on the outer peripheral portion of the bearing case 47. On the other hand, a set screw 52 capable of releasing the bearing case 47 is screwed onto the right side surface of the cylindrical wall portion 31a. That is, by loosening the set screw 52 and rotating the eccentric pin 51 in the clockwise direction or the counterclockwise direction, the bearing case 47 is moved forward or backward through the engagement between the eccentric pin portion 51a and the pin hole 47a. , That is, a small distance in the axial direction (for example, 1
It is possible to move only about 2 mm), and at the same time, the position of the entire rotary hook 34 can be finely adjusted in the front-rear direction via the hook shaft 35. Therefore, the needle gap, which is the gap between the sewing needle 11 and the tip 34b, can be easily adjusted. .

【００３０】以上の多頭刺繍ミシンＭにおいて、ベッド
ユニット７の作用について説明する。釜駆動モータ３３
の駆動軸３３ａは第１連結部材４１に取付けられ、全回
転釜３４に取付けられた釜軸３５は、第２連結部材４２
に取付けられるとともに、取付けブロック３１の円筒壁
部３１ａに前後動可能に支持されているベアリングケー
ス４７に設けたベアリング４８で回転可能に支持されて
いる。The operation of the bed unit 7 in the above-described multi-head embroidery sewing machine M will be described. Hook drive motor 33
Drive shaft 33a is attached to the first connecting member 41, and the shuttle shaft 35 attached to the full-rotating shuttle 34 is attached to the second connecting member 42.
And is rotatably supported by a bearing 48 provided in a bearing case 47 that is supported by the cylindrical wall portion 31a of the mounting block 31 so as to be movable back and forth.

【００３１】そして、カップリング４０は、駆動軸３３
ａに取付けられた第１連結部材４１と、釜軸３５に取付
けられた第２連結部材４２と、硬質ゴム製の緩衝部材４
３とからなり、第１連結部材４１の軸方向に平行な駆動
力出力部４１ａと第２連結部材４２の軸方向に平行な駆
動力入力部４２ａとが対向し且つこれら駆動力出力部４
１ａと駆動力入力部４２ａとの間に硬質ゴム製の緩衝部
材４３が挟着されているので、カップリング４０を簡単
な構造にできる上、駆動力出力部４１ａからの駆動力を
緩衝部材４３を介して駆動力入力部４２ａに伝達しなが
ら、対向状の駆動力出力部４１ａと駆動力入力部４２ａ
とにより、釜軸３５の位相と駆動軸３３ａの位相にズレ
を生じることなく釜軸３５を駆動軸３３ａに対して軸方
向に移動させることができる。The coupling 40 is connected to the drive shaft 33.
The first connecting member 41 attached to a, the second connecting member 42 attached to the shuttle shaft 35, and the buffer member 4 made of hard rubber.
3, the driving force output portion 41a parallel to the axial direction of the first coupling member 41 and the driving force input portion 42a parallel to the axial direction of the second coupling member 42 face each other and these driving force output portion 4
Since the cushioning member 43 made of hard rubber is sandwiched between the driving force input portion 42a and the driving force input portion 1a, the coupling 40 can have a simple structure, and the driving force from the driving force output portion 41a can be buffered. While being transmitted to the driving force input section 42a via the, the driving force output section 41a and the driving force input section 42a facing each other.
By this, the shuttle shaft 35 can be moved in the axial direction with respect to the drive shaft 33a without causing a deviation between the phase of the shuttle shaft 35 and the phase of the drive shaft 33a.

【００３２】また、その緩衝部材４３により、全回転釜
３４の急激な負荷変動を緩和させて釜駆動モータ３３に
伝達できることから、釜駆動モータ３３の脱調限界を高
めることができる。更に、これら出力部４１ａと入力部
４２ａとが直接接触しないことから、これらの接触音の
発生を防止することができる。更に、釜軸３５は、第２
連結部材４２と緩衝部材４３とを挿通し、第１連結部材
４１の軸穴４１ｂに嵌入され、これら釜軸３５と駆動軸
３３ａとは同心状に連結されているので、カップリング
４０による駆動力伝達性能を損なうことがない。Further, since the shock absorbing member 43 can alleviate a sudden load change of the full rotary hook 34 and transmit it to the hook drive motor 33, the step-out limit of the hook drive motor 33 can be increased. Further, since the output section 41a and the input section 42a do not directly contact with each other, it is possible to prevent these contact sounds from being generated. Further, the hook shaft 35 is the second
Since the connecting member 42 and the cushioning member 43 are inserted into the shaft hole 41b of the first connecting member 41 and the shuttle shaft 35 and the drive shaft 33a are concentrically connected to each other, the driving force of the coupling 40 is used. It does not impair the transmission performance.

【００３３】このように、駆動軸３３ａに取付けられた
第１連結部材４１と、釜軸３５に取付けられた第２連結
部材４２と、硬質ゴム製の緩衝部材４３とからなるカッ
プリング４０を設け、このカップリング４０において
は、第１連結部材４１の軸方向に平行な駆動力出力部４
１ａと第２連結部材４２の軸方向に平行な駆動力入力部
４２ａとが対向し且つこれら駆動力出力部４１ａと駆動
力入力部４２ａとの間に硬質ゴム製の緩衝部材４３が挟
着されているので、カップリング４０を簡単な構造にで
きる上、駆動力出力部４１ａからの駆動力を緩衝部材４
３を介して駆動力入力部４２ａに伝達しながら、釜軸３
５の位相と駆動軸３３ａの位相にズレを生じることなく
釜軸３５を駆動軸３３ａに対して軸方向に移動させるこ
とができ、全回転釜３４の剣先３４ｂの出合い位置と縫
針１１の出合い位置とに位相ズレを生じることなく、剣
先３４ｂと縫針１１との隙間寸法である針隙だけを調節
できるので、針隙調整の簡単化を図ることができる。As described above, the coupling 40 including the first connecting member 41 attached to the drive shaft 33a, the second connecting member 42 attached to the shuttle shaft 35, and the buffer member 43 made of hard rubber is provided. In the coupling 40, the driving force output unit 4 parallel to the axial direction of the first connecting member 41
1a and a driving force input portion 42a parallel to the axial direction of the second connecting member 42 face each other, and a buffer member 43 made of hard rubber is sandwiched between the driving force output portion 41a and the driving force input portion 42a. Therefore, the coupling 40 can have a simple structure, and the driving force from the driving force output portion 41a can be absorbed by the buffer member 4.
While transmitting to the driving force input section 42a via
It is possible to move the shuttle shaft 35 in the axial direction with respect to the drive shaft 33a without causing a phase difference between the phase of No. 5 and the phase of the drive shaft 33a. Since the needle gap, which is the gap between the sword tip 34b and the sewing needle 11, can be adjusted without causing a phase shift between the two, it is possible to simplify the needle gap adjustment.

【００３４】しかも、位置調節機構５０を設けたので、
偏心ピン５１を時計回り方向又は反時計回り方向に回転
させることにより、縫針１１と剣先３４ｂとの隙間寸法
である針隙を簡単に且つ精度良く調節することができ
る。また、緩衝部材４３により、全回転釜３４の急激な
負荷変動を緩和させて釜駆動モータ３３に伝達でき、釜
駆動モータ３３の脱調限界を高めることができる。更
に、これら出力部４１ａと入力部４２ａとが直接接触し
ないことから、これらの接触音の発生を防止することが
できる。加えて、釜軸３５は、第２連結部材４２と緩衝
部材４３とを挿通し、第１連結部材４１の軸穴４１ｂに
嵌入され、これら釜軸３５と駆動軸３３ａとは同心状に
連結されているので、カップリング４０による駆動力伝
達性能を損なうことがない。Moreover, since the position adjusting mechanism 50 is provided,
By rotating the eccentric pin 51 in the clockwise direction or the counterclockwise direction, it is possible to easily and accurately adjust the needle gap, which is the gap size between the sewing needle 11 and the sword tip 34b. Further, the buffer member 43 can alleviate a sudden load change of the full-rotation shuttle 34 and transmit it to the shuttle drive motor 33, so that the step-out limit of the shuttle drive motor 33 can be increased. Further, since the output section 41a and the input section 42a do not directly contact with each other, it is possible to prevent these contact sounds from being generated. In addition, the shuttle shaft 35 is inserted into the shaft hole 41b of the first connecting member 41 through the second connecting member 42 and the cushioning member 43, and the shuttle shaft 35 and the drive shaft 33a are concentrically connected to each other. Therefore, the driving force transmission performance of the coupling 40 is not impaired.

【００３５】ところで、前記カップリング４０を、図
８、図９に示すように、部分的に変更したカップリング
６０で構成してもよい。即ち、第１連結部材６１には、
釜駆動モータ３３の駆動軸３３ａの軸心を中心とする略
半円形状の第１外側面６１ａと、その第１外側面６１ａ
と駆動軸心を挟むように駆動軸心を中心とする略半円形
状の第１内側面６１ｂとが形成され、その第１連結部材
６１に対向状の第２連結部材６２には、第１外側面６１
ａと係合するために、釜軸３５の軸心を中心とする略半
円形状の第２内側面６２ａと、第１内側面６１ｂと係合
するために、釜軸心を中心とする略半円形状の第２外側
面６２ｂとが形成されている。By the way, the coupling 40 may be composed of a partially modified coupling 60 as shown in FIGS. That is, in the first connecting member 61,
A substantially semicircular first outer side surface 61a centering on the shaft center of the drive shaft 33a of the shuttle drive motor 33, and the first outer side surface 61a.
And a substantially semicircular first inner side surface 61b centered on the drive shaft center so as to sandwich the drive shaft center, and the first connecting member 61 has a second connecting member 62 facing the first inner surface 61b. Outer side 61
In order to engage a, a second semi-circular second inner side surface 62a centered on the shaft center of the shuttle shaft 35 and a first inner side surface 61b are engaged about the shuttle shaft center. A semicircular second outer surface 62b is formed.

【００３６】そして、釜軸３５は第２連結部材６２と緩
衝部材４３とだけに挿通し、これら第１外側面６１ａと
第２内側面６２ａとが係合されるとともに、第１内側面
６１ｂと第２外側面６２ｂとが係合され、これらの係合
を介して駆動軸３３ａの回転がカップリング６０により
釜軸３５に伝達されて回転駆動するようになっている。
ここで、釜軸３５は、前述したように、ベアリングケー
ス４７に設けた１つのベアリング４８で支持されている
だけなので、釜軸３５の軸心が駆動軸３３ａの軸心に対
してズレたり、或いは傾いたりした場合でも、これら１
対の内側面６１ｂ，６２ａと外側面６１ａ，６２ｂとの
面係合により、これら釜軸３５と駆動軸３５ａとを同心
状に連結することができ、またこれら両連結部材６１，
６２の摩耗を抑制してその耐久性を向上できる上、緩衝
部材４３を設けているので、前記実施形態と同様に、釜
駆動モータ３３の脱調限界を高めることができ、接触音
の発生を防止することができ、加えて、カップリング６
０による駆動力伝達性能を損なうことがない。The shuttle shaft 35 is inserted only through the second connecting member 62 and the cushioning member 43, and the first outer side surface 61a and the second inner side surface 62a are engaged with each other and the first inner side surface 61b. The second outer side surface 62b is engaged, and the rotation of the drive shaft 33a is transmitted to the shuttle shaft 35 by the coupling 60 via these engagements so as to be rotationally driven.
Here, as described above, since the shuttle shaft 35 is only supported by the one bearing 48 provided in the bearing case 47, the shaft center of the shuttle shaft 35 may deviate from the shaft center of the drive shaft 33a. Or even if you tilt, these 1
By the surface engagement between the pair of inner side surfaces 61b, 62a and the outer side surfaces 61a, 62b, the shuttle shaft 35 and the drive shaft 35a can be concentrically connected to each other.
The wear of 62 can be suppressed and the durability thereof can be improved. Further, since the cushioning member 43 is provided, the step-out limit of the shuttle drive motor 33 can be increased and the occurrence of contact noise can be prevented as in the above-described embodiment. Can be prevented, in addition, the coupling 6
The driving force transmission performance of 0 is not impaired.

【００３７】更に、図１０に示すように、カップリング
６５として、一般的な一体型のものを用いて駆動軸７０
ａと釜軸３５とを連結し、その駆動軸７０ａを軸方向に
移動可能に構成してもよい。即ち、釜駆動モータ７０の
駆動軸７０ａはその両端部において、ケーシングに設け
た１対のベアリング７１で夫々回転可能に且つ軸方向移
動可能に支持され、駆動軸７０ａには、駆動軸７０ａが
軸方向に移動可能な移動代を設けて１対のストッパリン
グ７２が夫々取付けられている。そして、駆動軸７０ａ
に設けたロータ部７３とケーシング内に設けた励磁コイ
ル７４とにより、駆動軸７０ａが軸方向に移動した何れ
の移動位置においても、回転駆動できるようになってい
る。Further, as shown in FIG. 10, a drive shaft 70 is formed by using a general integral type as the coupling 65.
The drive shaft 70a may be configured so as to be movable in the axial direction by connecting a to the shuttle shaft 35. That is, the drive shaft 70a of the shuttle drive motor 70 is rotatably and axially movably supported by a pair of bearings 71 provided on the casing at both ends of the drive shaft 70a. A pair of stopper rings 72 are attached to each other with a movement allowance that is movable in any direction. And the drive shaft 70a
By the rotor portion 73 provided in the above and the exciting coil 74 provided in the casing, the drive shaft 70a can be rotationally driven at any movement position where the drive shaft 70a is moved in the axial direction.

【００３８】一方、カップリング６５に取付けられたデ
ィスクエンコーダ４４に臨むように取付けブロック３１
に取付けられたエンコーダセンサ４５の発光部４５ａと
受光部４５ｂ間距離ｓが、駆動軸７０ａの軸方向移動量
ｒ（例えば、２〜３ｍｍ）よりも大きくしてある。これ
により、前記実施形態と同様に、釜軸３５の位相と駆動
軸７０ａの位相にズレを生じることなく、位置調節機構
５０を介して釜軸３５を軸方向に移動させることがで
き、全回転釜３４の剣先３４ｂの出合い位置と縫針１１
の出合い位置とに位相ズレを生じることなく、剣先３４
ｂと縫針１１との針隙調整の簡単化を図ることができ
る。更に、駆動軸７０ａを軸方向へ移動させたときで
も、ディスクエンコーダ４４がエンコーダセンサ４５に
衝突することがない。On the other hand, the mounting block 31 faces the disk encoder 44 mounted on the coupling 65.
The distance s between the light emitting portion 45a and the light receiving portion 45b of the encoder sensor 45 attached to the drive shaft is larger than the axial movement amount r of the drive shaft 70a (for example, 2 to 3 mm). As a result, similarly to the above-described embodiment, the shuttle shaft 35 can be moved in the axial direction via the position adjusting mechanism 50 without causing a deviation between the phase of the shuttle shaft 35 and the phase of the drive shaft 70a, and a full rotation is possible. Encounter position of the blade tip 34b of the hook 34 and the sewing needle 11
The tip of the sword 34
It is possible to simplify the needle gap adjustment between b and the sewing needle 11. Further, even when the drive shaft 70a is moved in the axial direction, the disc encoder 44 does not collide with the encoder sensor 45.

【００３９】尚、カップリング４０を、断面多角形とす
る柱状の第１連結部材とこの第１連結部材に外嵌される
第２連結部材とで構成したり、１対の対向する板状の突
出部を有する第１連結部材とこの１対の突出部の内部に
嵌入する板状の突出部を有する第２連結部材とで構成し
たり、釜駆動モータの駆動軸を長くして釜軸及びカップ
リングを省略し、その駆動軸の先端部に全回転釜３４を
直接取り付けたり、種々の構成により釜軸と駆動軸の位
相ズレを生じることなく釜軸を駆動軸に対して軸方向移
動可能に構成する等、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づいて種々の変更を加えるこ
ともあり得る。また、１台の刺繍ミシンを備えた単頭型
の刺繍ミシン、ミシンモータで主軸を介して駆動される
釜駆動機構を備えたミシンなどの各種のミシンに本発明
を適用し得ることは勿論である。更に、実施形態におい
ては、糸輪捕捉用釜として全回転釜を使用しているが、
半回転釜やルーパーを備えたミシンに本発明を適用して
もよい。The coupling 40 is composed of a columnar first connecting member having a polygonal cross section and a second connecting member fitted onto the first connecting member, or a pair of opposing plate-like members. It is composed of a first connecting member having a projecting portion and a second connecting member having a plate-like projecting portion fitted into the pair of projecting portions, and the drive shaft of the shuttle drive motor is lengthened to provide a shuttle shaft and The rotary shaft 34 can be moved in the axial direction with respect to the drive shaft without the need for the coupling and the full rotary hook 34 being directly attached to the tip of the drive shaft, or the phase difference between the drive shaft and the drive shaft due to various configurations. For example, various modifications may be made to the above-described embodiment based on existing technology or technology obvious to those skilled in the art. Further, the present invention can be applied to various sewing machines such as a single-head type embroidery sewing machine having one embroidery sewing machine and a sewing machine having a shuttle drive mechanism driven by a sewing machine motor via a spindle. is there. Further, in the embodiment, the full-rotary hook is used as the hook for catching the yarn wheel,
The present invention may be applied to a sewing machine equipped with a half-turn hook and a looper.

【００４０】[0040]

【発明の効果】 請求項１のミシンにおいては、釜軸の
位相と駆動軸の位相にズレを生じることなく釜軸を駆動
軸に対して軸方向移動可能で且つ駆動力を伝達可能なカ
ップリングで、糸輪捕捉用釜に取付けられた釜軸と駆動
手段の駆動軸とを連結したので、糸輪捕捉用釜の剣先の
出合い位置と縫針の出合い位置とに位相ズレを生じるこ
となく、剣先と縫針との隙間寸法である針隙だけを調節
できるので、出合い位置を調整することなく、針隙調整
の簡単化を図ることができる。According to the sewing machine of the first aspect of the present invention, the coupling is capable of axially moving the shuttle shaft with respect to the drive shaft and transmitting the drive force without causing a phase difference between the shuttle shaft and the drive shaft. Since the hook shaft attached to the thread catcher and the drive shaft of the drive means are connected, there is no phase shift between the knuckle position of the thread catcher and the sewing needle Since only the needle gap, which is the gap between the needle and the sewing needle, can be adjusted, the needle gap adjustment can be simplified without adjusting the encounter position.

【００４１】このカップリングは、駆動軸に取付けられ
た第１連結部材と、釜軸に取付けられた第２連結部材
と、硬質ゴム製の緩衝部材とを備え、第１連結部材の軸
方向に平行な駆動力出力部と第２連結部材の軸方向に平
行な駆動力入力部とが対向し且つこれら駆動力出力部と
駆動力入力部との間に硬質ゴム製の緩衝部材が挟着され
ているので、カップリングを簡単な構造にできる上、駆
動力出力部からの駆動力を緩衝部材を介して駆動力入力
部に伝達しながら、対向状の駆動力出力部と駆動力入力
部とにより、釜軸の位相と駆動軸の位相にズレを生じる
ことなく釜軸を駆動軸に対して軸方向に移動させること
ができる。 This coupling is equipped with a first connecting member attached to the drive shaft, a second connecting member attached to the shuttle shaft, and a buffer member made of hard rubber, and is arranged in the axial direction of the first connecting member. The parallel driving force output section and the driving force input section parallel to the axial direction of the second connecting member face each other, and a cushioning member made of hard rubber is sandwiched between the driving force output section and the driving force input section. Since the coupling has a simple structure, the driving force output section and the driving force input section are opposed to each other while transmitting the driving force from the driving force output section to the driving force input section via the buffer member. As a result, the shuttle shaft can be moved in the axial direction with respect to the drive shaft without causing a deviation between the phase of the shuttle shaft and the phase of the drive shaft.

【００４２】更に、その緩衝部材により、糸輪捕捉用釜
の急激な負荷変動を緩和させることができ、またこれら
出力部と入力部とが直接接触しないことから、これらの
接触音の発生を防止することができる。請求項２のミシ
ンにおいては、請求項１と同様の効果を奏するが、釜軸
と駆動軸の何れか一方を他方に取付けられた第１又は第
２連結部材の軸穴に嵌入させることによって釜軸と駆動
軸とを同心状に連結したので、カップリングによる駆動
力伝達性能を損なうことがない。Further, the shock absorbing member can alleviate a sudden load fluctuation of the loop for catching the yarn ring, and since the output section and the input section do not come into direct contact with each other, the generation of these contact noises is prevented. can do. In the sewing machine according to claim 2, the same effect as claim 1, hook by fitting one of the hook shaft and the drive shaft in the axial bore of the first or second connecting member attached to the other Since the shaft and the drive shaft are concentrically connected to each other, the driving force transmission performance by the coupling is not impaired.

【００４３】請求項３のミシンにおいては、請求項１と
同様の効果を奏するが、前記第１連結部材には、駆動軸
心を中心とする略半円形状の第１外側面と、その第１外
側面と駆動軸心を挟むように駆動軸心を中心とする略半
円形状の第１内側面とが設けられ、前記第２連結部材に
は、第１外側面と係合するために釜軸心を中心とする略
半円形状の第２内側面と、第１内側面と係合するために
釜軸心を中心とする略半円形状の第２外側面とが設けら
れ、これらの係合によって釜軸と駆動軸とを同心状に連
結したので、釜軸心が駆動軸の軸心に対してズレたり、
或いは傾いたりした場合でも、これら１対の内側面と外
側面との面係合により、これら釜軸と駆動軸とを同心状
に連結することができ、またこれら両連結部材の摩耗を
抑制してその耐久性を向上できる。[0043] In the sewing machine according to claim 3, which provides the same effect as claim 1, wherein the first coupling member, a first outer surface of the substantially semicircular shape centered on the drive axis, the first 1 an outer surface and a first semi-circular first inner surface centering on the drive shaft center so as to sandwich the drive shaft center, and the second connecting member for engaging with the first outer surface. A second semi-circular inner side surface centering on the shuttle shaft center and a second semi-circular second outer surface centering on the shuttle shaft center for engaging the first inner side surface are provided. Since the hook shaft and the drive shaft are concentrically connected by the engagement of, the hook shaft center is displaced from the drive shaft axis center,
Alternatively, even if the shafts are tilted, the hook shaft and the drive shaft can be concentrically connected to each other by the surface engagement between the pair of inner side surfaces and the outer side surface, and the wear of these both connecting members can be suppressed. The durability can be improved.

【００４４】請求項４のミシンにおいては、請求項２ま
たは３と同様の効果を奏するが、位置調節手段により、
糸輪捕捉用釜を取付けた釜軸を軸方向に簡単に位置調節
することができる。請求項５のミシンにおいては、請求
項４と同様の効果を奏するが、駆動手段において、ミシ
ンモータとは独立の電動モータで糸輪捕捉用釜を駆動す
るので、糸輪捕捉用釜をミシンモータに連結させて駆動
する連結駆動機構を省略でき、駆動手段を、例えば釜モ
ジュールのように着脱可能な小型のユニットに構成する
ことができる。In the sewing machine of claim 4 , the same effect as that of claim 2 or 3 can be obtained, but by the position adjusting means,
It is possible to easily adjust the position of the shuttle shaft to which the shuttle for capturing the yarn wheel is attached in the axial direction. In the sewing machine of the fifth aspect , the same effect as that of the fourth aspect is obtained, but the driving means drives the thread catching hook by an electric motor independent of the sewing machine motor. It is possible to omit a connection drive mechanism that is connected to and driven by the drive mechanism, and the drive means can be configured as a detachable small unit such as a hook module.

【００４５】[0045]

【００４６】[0046]

【図面の簡単な説明】[Brief description of drawings]

【図１】多頭型刺繍ミシンの斜視図である。FIG. 1 is a perspective view of a multi-head type embroidery sewing machine.

【図２】作業用テーブル及びベッドユニットを示す要部
拡大部分平面図である。FIG. 2 is an enlarged partial partial plan view showing a work table and a bed unit.

【図３】釜モジュールを設けたベッドユニットの部分平
面図である。FIG. 3 is a partial plan view of a bed unit provided with a shuttle module.

【図４】釜モジュールを設けたベッドユニットの部分縦
断側面図である。FIG. 4 is a partial vertical sectional side view of a bed unit provided with a shuttle module.

【図５】カップリングの分解斜視図である。FIG. 5 is an exploded perspective view of a coupling.

【図６】全回転釜の正面図である。FIG. 6 is a front view of a full rotary hook.

【図７】ベッドユニットの前端部分の要部部分横断断面
図である。FIG. 7 is a partial cross-sectional view of the main part of the front end portion of the bed unit.

【図８】変更形態に係る図５相当図である。FIG. 8 is a view corresponding to FIG. 5 according to the modification.

【図９】カップリングの断面を含む図８の平面図であ
る。9 is a plan view of FIG. 8 including a cross section of the coupling.

【図１０】変更態様に係る図７相当図である。FIG. 10 is a view corresponding to FIG. 7 according to the modification.

【符号の説明】[Explanation of symbols]

Ｍ 多頭型刺繍ミシン １０ 針棒 １１ 縫針 ３０ 釜モジュール ３３ 釜駆動モータ ３３ａ 駆動軸 ３４ 全回転釜 ３５ 釜軸 ４０，６０，６５ カップリング ４１，６１ 第１連結部材 ４１ａ 駆動力出力部 ４１ｂ 軸穴 ４２，６２ 第２連結部材 ４２ａ 駆動力入力部 ４４ ディスクエンコーダ ４５ エンコーダセンサ ４５ａ 発光部 ４５ｂ 受光部 ５０ 位置調節機構 ５１ 偏心ピン ６１ａ 第１外側面 ６１ｂ 第１内側面 ６２ａ 第２内側面 ６２ｂ 第２外側面 M Multi-head embroidery sewing machine 10 needle bars 11 sewing needles 30 hook module 33 hook drive motor 33a drive shaft 34 full rotary hook 35 hook shaft 40,60,65 coupling 41,61 1st connection member 41a Driving force output section 41b shaft hole 42,62 Second connection member 42a Driving force input section 44 disk encoder 45 encoder sensor 45a light emitting unit 45b Light receiving part 50 Position adjustment mechanism 51 eccentric pin 61a First outer surface 61b First inner surface 62a Second inner surface 62b Second outer surface

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 ミシンモータで主軸を介して駆動される
縫針と、縫針と協働して糸輪を捕捉する糸輪捕捉用釜
と、糸輪捕捉用釜を回転駆動する駆動手段とを備えたミ
シンにおいて、 前記糸輪捕捉用釜に取付けられた釜軸と駆動手段の駆動
軸とを連結するカップリングを設け、前記カップリングは、駆動軸に取付けられ軸方向に平行
な駆動力出力部を有する第１連結部材と、釜軸に取付け
られ軸方向に平行な駆動力入力部を有する第２連結部材
と、これら駆動力出力部と駆動力入力部との間に挟着さ
れる硬質ゴム製の緩衝部材とを備え、 前記 カップリングは、釜軸の位相と駆動軸の位相にズレ
を生じることなく釜軸を駆動軸に対して軸方向移動可能
で且つ駆動力を伝達可能に連結することを特徴とするミ
シン。1. A sewing machine including a sewing needle driven by a sewing machine motor through a main shaft, a yarn wheel catching hook that cooperates with the sewing needle to catch a thread wheel, and a drive unit that rotationally drives the thread wheel catching hook. In the sewing machine, a coupling that connects the shuttle shaft attached to the thread catcher and the drive shaft of the drive means is provided, and the coupling is attached to the drive shaft and parallel to the axial direction.
Attached to the hook shaft and the first connecting member with various driving force output
Second connecting member having a driving force input portion parallel to the axial direction
And between these drive force output section and drive force input section
And a hard rubber cushioning member, wherein the coupling is a and driving force in the axial direction movable hook shaft without causing a shift in the phase of the drive shaft relative to the drive shaft of the shuttle shaft can be transmitted A sewing machine characterized by being connected to. 【請求項２】 前記釜軸と駆動軸の何れか一方を他方に
取付けられた第１又は第２連結部材の軸穴に嵌入させる
ことによって釜軸と駆動軸とを同心状に連結したことを
特徴とする請求項１に記載のミシン。2. A hook shaft and a drive shaft are concentrically connected by fitting one of the hook shaft and the drive shaft into a shaft hole of a first or second connecting member attached to the other. The sewing machine according to claim 1 , wherein the sewing machine is a sewing machine. 【請求項３】 前記第１連結部材には、駆動軸心を中心
とする略半円形状の第１外側面と、その第１外側面と駆
動軸心を挟むように駆動軸心を中心とする略半円形状の
第１内側面とが設けられ、前記第２連結部材には、第１
外側面と係合するために釜軸心を中心とする略半円形状
の第２内側面と、第１内側面と係合するために釜軸心を
中心とする略半円形状の第２外側面とが設けられ、これ
らの係合によって釜軸と駆動軸とを同心状に連結したこ
とを特徴とする請求項１に記載のミシン。3. The first connecting member includes a first outer surface having a substantially semi-circular shape centered on the drive shaft center, and a drive shaft center so as to sandwich the drive shaft center with the first outer surface. A substantially semicircular first inner surface, and the second connecting member has a first inner surface.
A second semi-circular inner surface centering on the shuttle shaft center for engaging the outer surface, and a second semi-circular second centering center on the shuttle shaft for engaging the first inner surface. The sewing machine according to claim 1 , wherein an outer side surface is provided, and the hook shaft and the drive shaft are concentrically connected to each other by their engagement. 【請求項４】 前記糸輪捕捉用釜を取付けた釜軸を軸方
向に位置調節する位置調節手段を備えたことを特徴とす
る請求項２または３に記載のミシン。4. A sewing machine according to claim 2 or 3, further comprising a position adjusting means for adjusting the position of the hook shaft fitted with the thread wheel catcher in the axial direction. 【請求項５】 前記駆動手段は、ミシンモータとは独立
の電動モータで糸輪捕捉用釜を駆動するように構成され
たことを特徴とする請求項４に記載のミシン。5. The sewing machine according to claim 4 , wherein the drive means is configured to drive the thread catching hook by an electric motor independent of the sewing machine motor.