JP2003190686A - Needle-bar-driving apparatus of sewing machine - Google Patents
Needle-bar-driving apparatus of sewing machineInfo
- Publication number
- JP2003190686A JP2003190686A JP2001394416A JP2001394416A JP2003190686A JP 2003190686 A JP2003190686 A JP 2003190686A JP 2001394416 A JP2001394416 A JP 2001394416A JP 2001394416 A JP2001394416 A JP 2001394416A JP 2003190686 A JP2003190686 A JP 2003190686A
- Authority
- JP
- Japan
- Prior art keywords
- needle bar
- lever
- needle
- jump
- lifting body
- 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.)
- Granted
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主に工業用ミシン
において、運転中に針棒を上死点で停止させるジャンプ
機構を備えた針棒駆動装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle bar drive device having a jump mechanism for stopping the needle bar at top dead center during operation, mainly in an industrial sewing machine.
【０００２】[0002]
【従来の技術】従来、特許２７５２４８２号公報にジャ
ンプ機構を備えた針棒駆動装置が提案されている。この
従来装置は、図９及び図１０に示すように、針棒７１と
平行な案内軸７２を備え、案内軸７２にコ字形の昇降体
７３と針棒駆動部材７４とが支持されている。ミシンの
上軸７５には針棒駆動カム７６が固定され、このカム７
６によりクランク機構７７を介し昇降体７３及び針棒駆
動部材７４が一体に昇降される。針棒駆動部材７４には
針棒抱き７８のピン７９に係合する係合部８０が突設さ
れ、針棒駆動部材７４の昇降に伴い針棒７１及び針（図
示略）が駆動される。2. Description of the Related Art A needle bar drive device having a jump mechanism has been proposed in Japanese Patent No. 2752482. As shown in FIGS. 9 and 10, this conventional device includes a guide shaft 72 parallel to the needle bar 71, and a U-shaped lifting body 73 and a needle bar drive member 74 are supported by the guide shaft 72. A needle bar drive cam 76 is fixed to the upper shaft 75 of the sewing machine.
6, the lifting body 73 and the needle bar drive member 74 are moved up and down integrally via the crank mechanism 77. The needle bar drive member 74 is provided with an engaging portion 80 that engages with the pin 79 of the needle bar holder 78, and the needle bar 71 and the needle (not shown) are driven as the needle bar drive member 74 moves up and down.
【０００３】ジャンプ機構８２は、上軸７５に固定され
たジャンプカム８３と、ジャンプカム８３に係合するカ
ムフォロア８４を備えた入力レバー８５と、針棒駆動部
材７４の押圧面８６に係合するローラ８７を備えた出力
レバー８８と、出力レバー８８を入力レバー８５に連動
可能に結合するクラッチ機能を備えたソレノイド８９と
から構成されている。出力レバー８８はソレノイド８９
のプランジャ９０と同心の水平軸９１に回動可能に支持
され、入力レバー８５は水平ピン９２により出力レバー
８８の中間部に回動可能に連結されている。The jump mechanism 82 engages with a jump cam 83 fixed to the upper shaft 75, an input lever 85 having a cam follower 84 engaging with the jump cam 83, and a pressing surface 86 of the needle bar drive member 74. The output lever 88 includes a roller 87, and a solenoid 89 having a clutch function for connecting the output lever 88 to the input lever 85 in a linked manner. Output lever 88 is solenoid 89
Is rotatably supported by a horizontal shaft 91 concentric with the plunger 90, and the input lever 85 is rotatably connected to an intermediate portion of the output lever 88 by a horizontal pin 92.
【０００４】目飛び等に際しジャンプ信号が出力された
ときには、ソレノイド８９が励磁され、プランジャ９０
が入力レバー８５の突端部９３に係止され、出力レバー
８８が入力レバー８５にプランジャ９０の水平軸線周り
で連動可能に結合される。そして、針棒７１が上死点よ
り下側に位置するタイミングで、針棒駆動部材７４がロ
ーラ８７により案内軸７２の周りで回動され、針棒７１
が上死点で停止するタイミングで、係合部８０がピン７
９から退避され、昇降体７３から針棒７１への動力伝達
が遮断される。When a jump signal is output at the time of skipping or the like, the solenoid 89 is excited and the plunger 90 is excited.
Is locked to the projecting end portion 93 of the input lever 85, and the output lever 88 is coupled to the input lever 85 so as to be interlocked around the horizontal axis of the plunger 90. Then, at the timing when the needle bar 71 is positioned below the top dead center, the needle bar drive member 74 is rotated by the roller 87 around the guide shaft 72, and the needle bar 71 is rotated.
Is stopped at the top dead center, the engaging portion 80 moves to the pin 7
9, the power transmission from the lifting body 73 to the needle bar 71 is cut off.
【０００５】[0005]
【発明が解決しようとする課題】従来の針棒駆動装置に
よれば、ジャンプカム８３を用いて針棒駆動部材７４を
制御するため、針棒７１の上下運動をその上死点で正確
にキャンセルすることができる。しかし、出力レバー８
８を水平軸線周りで回動して、ローラ８７を垂直面内で
円運動させるので、針棒駆動部材７４の動力受入点が上
下に変化する。このため、針棒駆動部材７４の押圧面８
６を上下に長く形成する必要があり、針棒駆動部材７４
及びこれを支持する昇降体７３が大型化する。従って、
これらの昇降部材がミシンヘッドの内部に大きなスペー
スを占有するばかりでなく、昇降部材の慣性質量が増
し、摺動面積も大きくなり、高速運転時の安定性が低下
するという問題点があった。According to the conventional needle bar drive device, since the jump bar 83 is used to control the needle bar drive member 74, the vertical movement of the needle bar 71 is accurately canceled at its top dead center. can do. However, the output lever 8
Since the roller 87 is rotated about the horizontal axis and the roller 87 is moved circularly in the vertical plane, the power receiving point of the needle bar driving member 74 changes up and down. Therefore, the pressing surface 8 of the needle bar driving member 74
6 needs to be formed vertically long, and the needle bar drive member 74
Also, the elevating body 73 that supports the size increases. Therefore,
Not only these lifting members occupy a large space inside the sewing machine head, but also the inertial mass of the lifting members increases, the sliding area increases, and the stability during high-speed operation deteriorates.
【０００６】本発明の目的は、上記課題を解決し、昇降
体及び針棒駆動部材を小型軽量化して、ミシンヘッド内
部の占有スペースを縮小でき、高速運転時の安定性を高
めることができるミシンの針棒駆動装置を提供すること
にある。An object of the present invention is to solve the above problems, reduce the size of the lifting body and the needle bar drive member, reduce the space occupied inside the sewing machine head, and improve the stability during high-speed operation. To provide a needle bar drive device of the above.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明によるミシンの針棒駆動装置は、針棒と平
行に立設された案内軸と、案内軸に支持された昇降体
と、昇降体に水平面内で回動可能に取り付けられた針棒
駆動部材と、ミシンの上軸の動力を昇降体に伝達する動
力伝達機構と、昇降体から針棒への動力伝達を遮断する
ジャンプ機構とを備え、ジャンプ機構を、上軸に固定さ
れたジャンプカムと、ジャンプカムにより垂直軸線の周
りで回動される入力レバーと、入力レバーと同じ軸線の
周りで回動可能に設けられた中間レバーと、ジャンプ信
号に応答し中間レバーを入力レバーに連動可能に結合す
るクラッチ手段と、クラッチ手段の結合動作時に中間レ
バーにより水平面内で回動される出力レバーとから構成
し、出力レバーに針棒駆動部材を針棒から退避した位置
に回動する駆動部を設けたことを特徴とする。In order to solve the above-mentioned problems, a needle bar driving device of a sewing machine according to the present invention is provided with a guide shaft that is erected parallel to the needle bar, and an elevating body supported by the guide shaft. And a needle bar drive member rotatably attached to the lifting body in a horizontal plane, a power transmission mechanism for transmitting the power of the upper shaft of the sewing machine to the lifting body, and a power transmission from the lifting body to the needle bar. The jump mechanism is provided with a jump cam fixed to the upper shaft, an input lever rotated by the jump cam about a vertical axis, and rotatable about the same axis as the input lever. And an output lever which is rotated in a horizontal plane by the intermediate lever when the clutch means is engaged in a coupling operation. On the needle Characterized in that a driving unit that rotates to a position retracted the driving member from the needle bar.
【０００８】ここで、動力伝達機構は、特定の機構に限
定されず、例えば、カム、クランク、リンク、ギヤ、ベ
ルト、チェーン等、各種の動力伝達部材を適宜に組み合
わせて構成することができる。クラッチ手段は、特定の
手段に限定されず、例えば、ソレノイド、エアシリン
ダ、モータ等、ミシンの制御装置により電気的に制御可
能なアクチュエータを用いて構成することができる。出
力レバーの駆動部は、特定の形状に限定されないが、駆
動部に針棒駆動部材を退避させる機能と、退避位置の針
棒駆動部材を昇降案内する機能とを兼備させるために、
駆動部を昇降体のストロークに相当する長さで上下に長
く形成するのが好ましい。Here, the power transmission mechanism is not limited to a specific mechanism, and various power transmission members such as a cam, a crank, a link, a gear, a belt and a chain can be appropriately combined and constructed. The clutch means is not limited to a specific means, and may be configured using an actuator, such as a solenoid, an air cylinder, or a motor, which can be electrically controlled by the control device of the sewing machine. The drive unit of the output lever is not limited to a particular shape, but in order to have both a function of retracting the needle bar drive member to the drive unit and a function of vertically guiding the needle bar drive member in the retracted position,
It is preferable that the drive unit is formed vertically with a length corresponding to the stroke of the lifting body.
【０００９】[0009]
【発明の実施の形態】以下、本発明を工業用刺繍ミシン
の針棒駆動装置に具体化した一実施形態を図面に基づい
て説明する。図１〜図３に示すように、ミシンヘッドの
フレーム１の下端には軸受メタル２を介して回転盤３が
水平面内で回転可能に組み付けられ、回転盤３に複数本
の針棒４と布押え棒５とが垂直に支持されている。針棒
４の上端には針棒頭６が固定され、針棒４の下端には針
７が止着され、布押え棒５の下端に布押え足８が固着さ
れている。そして、回転盤３は周知の針棒切換機構によ
って駆動され、１本の針棒４がミシンベッドの針穴（図
示略）と対応する縫製位置に割り出される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a needle bar driving device of an industrial embroidery sewing machine will be described with reference to the drawings. As shown in FIGS. 1 to 3, a turntable 3 is rotatably assembled on a lower end of a frame 1 of a sewing machine through a bearing metal 2 in a horizontal plane, and the turntable 3 has a plurality of needle bars 4 and cloths. The presser bar 5 is vertically supported. A needle bar head 6 is fixed to the upper end of the needle bar 4, a needle 7 is fixed to the lower end of the needle bar 4, and a cloth presser foot 8 is fixed to the lower end of the cloth presser bar 5. Then, the turntable 3 is driven by a known needle bar switching mechanism, and one needle bar 4 is indexed to a sewing position corresponding to a needle hole (not shown) of the sewing machine bed.
【００１０】針棒４の後側（図１の右側）において、軸
受メタル２には案内軸１０が針棒４と平行に立設され、
案内軸１０に昇降体１１が支持されている。昇降体１１
の下端部には取付片１２が針棒４側へ突設され、取付片
１２に針棒駆動部材１３が垂直ピン１４により水平面内
で回動可能に取り付けられている。針棒駆動部材１３は
硬質樹脂で薄く形成され、外周面に受動片１５と押圧片
１６と当接片１７（図３参照）とが放射状に突設されて
いる。受動片１５と昇降体１１との間には、針棒駆動部
材１３を針棒４と係合する位置へ付勢するスプリング１
８が介装され、この係合位置において、当接片１７が昇
降体１１のストッパ１９に当接し、押圧片１６が針棒頭
６の切欠２０に嵌入するようになっている。On the rear side (right side in FIG. 1) of the needle bar 4, a guide shaft 10 is erected on the bearing metal 2 in parallel with the needle bar 4.
An elevating body 11 is supported by the guide shaft 10. Lifting body 11
A mounting piece 12 is provided on the lower end portion of the needle bar so as to project toward the needle bar 4, and a needle bar drive member 13 is mounted on the mounting piece 12 by a vertical pin 14 so as to be rotatable in a horizontal plane. The needle bar driving member 13 is made of a hard resin and thin, and a passive piece 15, a pressing piece 16 and an abutting piece 17 (see FIG. 3) are radially provided on the outer peripheral surface thereof. Between the passive piece 15 and the lifting body 11, the spring 1 for urging the needle bar driving member 13 to a position where the needle bar driving member 13 is engaged with the needle bar 4.
8, the abutment piece 17 abuts the stopper 19 of the elevating body 11, and the pressing piece 16 fits into the notch 20 of the needle bar head 6 at this engagement position.
【００１１】案内軸１０の後側において、ヘッドフレー
ム１には刺繍ミシンの上軸２２が水平に貫通され、上軸
２２に針棒駆動カム２３が固定されている。針棒駆動カ
ム２３にクランクロッド２４のリング部２５が嵌着さ
れ、クランクロッド２４の下端は駆動レバー２６の中間
部に枢着されている。駆動レバー２６の後端はフレーム
１の固定軸２７に支持され、駆動レバー２６の前端はリ
ンク２８を介し昇降体１１に連結されている。そして、
針棒駆動カム２３、クランクロッド２４、駆動レバー２
６及びリンク２８により、上軸２２の動力を昇降体１１
に伝達する動力伝達機構２９が構成されている。On the rear side of the guide shaft 10, an upper shaft 22 of the embroidery sewing machine extends horizontally through the head frame 1, and a needle bar drive cam 23 is fixed to the upper shaft 22. The ring portion 25 of the crank rod 24 is fitted to the needle bar drive cam 23, and the lower end of the crank rod 24 is pivotally attached to the intermediate portion of the drive lever 26. The rear end of the drive lever 26 is supported by the fixed shaft 27 of the frame 1, and the front end of the drive lever 26 is connected to the lifting body 11 via a link 28. And
Needle bar drive cam 23, crank rod 24, drive lever 2
6 and the link 28 to move the power of the upper shaft 22 to the lifting body 11
And a power transmission mechanism 29 for transmitting the power to the vehicle.
【００１２】次に、昇降体１１から針棒４への動力伝達
を遮断するジャンプ機構３１について説明する。図２〜
図６に示すように、上軸２２にはジャンプカム３２が固
定され、フレーム１には基板３３が水平に設けられてい
る。基板３３の前端には針棒４を上死点に停止させるス
トッパ３４が取り付けられ、基板３３の後端には筒形の
縦軸３５が垂直に固定されている。縦軸３５には入力レ
バー３６が水平に支持され、その先端にカムフォロア３
７が取着され、基端のボス部３８に係止片３９が突設さ
れている。カムフォロア３７はスプリング４０によりジ
ャンプカム３２の端面に押し付けられ、そのカム形状に
従い入力レバー３６が縦軸３５の垂直軸線周りで回動さ
れる。Next, the jump mechanism 31 for interrupting the power transmission from the lift 11 to the needle bar 4 will be described. Figure 2
As shown in FIG. 6, a jump cam 32 is fixed to the upper shaft 22, and a board 33 is horizontally provided on the frame 1. A stopper 34 for stopping the needle bar 4 at the top dead center is attached to the front end of the substrate 33, and a cylindrical vertical axis 35 is vertically fixed to the rear end of the substrate 33. An input lever 36 is horizontally supported on the vertical axis 35, and a cam follower 3 is attached to the tip of the input lever 36.
7 is attached, and a locking piece 39 is projected from the boss portion 38 at the base end. The cam follower 37 is pressed against the end surface of the jump cam 32 by the spring 40, and the input lever 36 is rotated around the vertical axis of the vertical axis 35 according to the cam shape.
【００１３】入力レバー３６の上方において、基板３３
にはブラケット４２を介し吸引型のソレノイド４３が設
置され、そのプランジャ４４にカップリング４５を介し
ロッド４６が結合されている。ロッド４６は縦軸３５に
貫通され、圧縮バネ４７により下方へ付勢されている。
ロッド４６の下端にはアーム４８が固定され、アーム４
８にピン４９が立設されている。アーム４８と入力レバ
ー３６との間において、縦軸３５には中間レバー５０が
入力レバー３６と同じ軸線の周りで回動可能に組み付け
られている。中間レバー５０のボス部５１には縦穴５２
が貫設され、この縦穴５２にピン４９が下側から挿入さ
れている。Above the input lever 36, the substrate 33
A suction type solenoid 43 is installed via a bracket 42, and a rod 46 is connected to a plunger 44 thereof via a coupling 45. The rod 46 penetrates the vertical axis 35 and is urged downward by a compression spring 47.
An arm 48 is fixed to the lower end of the rod 46, and the arm 4
A pin 49 is erected on 8. An intermediate lever 50 is mounted on the vertical axis 35 between the arm 48 and the input lever 36 so as to be rotatable about the same axis as the input lever 36. A vertical hole 52 is formed in the boss portion 51 of the intermediate lever 50.
And the pin 49 is inserted into the vertical hole 52 from below.
【００１４】そして、ソレノイド４３によりクラッチ手
段が構成され、ジャンプ信号に応答しソレノイド４３が
励磁されたときには、プランジャ４４によりロッド４
６、アーム４８及びピン４９が引き上げられ、ピン４９
の上端が中間レバー５０のボス部５１より上方へ突出し
て入力レバー３６の係止片３９に係合し（図６参照）、
中間レバー５０が入力レバー３６に連動可能に結合され
る。また、通常の縫製時には、ソレノイド４３が消磁さ
れ、圧縮バネ４７によりアーム４８が押し下げられ、ピ
ン４９の上端が中間レバー５０の縦穴５２に没入して係
止片３９から解離され（図４参照）、入力レバー３６か
ら中間レバー５０への動力伝達が遮断される。The solenoid 43 constitutes clutch means, and when the solenoid 43 is excited in response to the jump signal, the plunger 44 causes the rod 4 to move.
6, the arm 48 and the pin 49 are pulled up, and the pin 49
The upper end of the projection protrudes above the boss portion 51 of the intermediate lever 50 and engages with the locking piece 39 of the input lever 36 (see FIG. 6).
The intermediate lever 50 is operably coupled to the input lever 36. Further, during normal sewing, the solenoid 43 is demagnetized, the arm 48 is pushed down by the compression spring 47, the upper end of the pin 49 is recessed in the vertical hole 52 of the intermediate lever 50 and disengaged from the locking piece 39 (see FIG. 4). The power transmission from the input lever 36 to the intermediate lever 50 is cut off.
【００１５】中間レバー５０は平面Ｌ字形に形成され、
長辺部の先端に連結ローラ５４が取着され、短辺部の先
端にバネ掛け５５が設けられている。基板３３の下面に
は中間レバー５０を挟む位置にストッパ５６とバネ受け
５７とが固定され、バネ受け５７とバネ掛け５５との間
に、中間レバー５０をストッパ５６側へ付勢する引張バ
ネ５８が張設されている。従って、ソレノイド４３の励
磁時には、引張りバネ５８の付勢力によりピン４９の上
端部が係止片３９に当接した状態で、中間レバー５０が
入力レバー３６と一体に往復回動される。The intermediate lever 50 is formed in a plane L shape,
The connecting roller 54 is attached to the tip of the long side portion, and the spring hook 55 is provided to the tip of the short side portion. A stopper 56 and a spring receiver 57 are fixed to the lower surface of the substrate 33 at a position sandwiching the intermediate lever 50, and a tension spring 58 for urging the intermediate lever 50 toward the stopper 56 is provided between the spring receiver 57 and the spring hook 55. Is stretched. Therefore, when the solenoid 43 is excited, the intermediate lever 50 is reciprocally rotated integrally with the input lever 36 in a state where the upper end of the pin 49 is in contact with the locking piece 39 by the urging force of the tension spring 58.
【００１６】中間レバー５０と針棒駆動部材１３との間
において、基板３３には垂直軸６０により出力レバー６
１が中間部にて水平に支持されている。出力レバー６１
の後端には切欠部６２が形成され、前端には駆動部６３
が下方へ垂設されている。切欠部６２には中間レバー５
０の連結ローラ５４が嵌合され、ソレノイド４３の励磁
時に、中間レバー５０により出力レバー６１が水平面内
で回動される。駆動部６３はピン状部材により昇降体１
１のストロークに相当する長さで上下に長く形成され、
出力レバー６１の一方向（図３及び図５の時計方向）へ
の回動に伴って受動片１５に係合し、押圧片１６を針棒
頭６の切欠２０から側方へ脱出させ、針棒駆動部材１３
を針棒４から退避した位置に回動するように構成されて
いる。Between the intermediate lever 50 and the needle bar driving member 13, the output lever 6 is attached to the substrate 33 by the vertical shaft 60.
1 is horizontally supported in the middle part. Output lever 61
A cutout portion 62 is formed at the rear end, and a drive portion 63 is formed at the front end.
Is hung vertically downward. The intermediate lever 5 is provided in the cutout portion 62.
The 0 connecting roller 54 is fitted, and when the solenoid 43 is excited, the intermediate lever 50 rotates the output lever 61 in the horizontal plane. The drive unit 63 is a pin-shaped member that lifts and lowers the body 1.
It has a length corresponding to one stroke and is formed vertically.
As the output lever 61 rotates in one direction (clockwise in FIGS. 3 and 5), it engages with the passive piece 15 and causes the pressing piece 16 to escape laterally from the notch 20 of the needle bar head 6, Rod drive member 13
Is configured to rotate to a position retracted from the needle bar 4.
【００１７】上記構成の針棒駆動装置において、回転盤
３により１本の針棒４が縫製位置に割り出されると、そ
の針棒頭６の切欠２０に針棒駆動部材１３の押圧片１６
が嵌入される。そして、上軸２２により動力伝達機構２
９を介して昇降体１１及び針棒駆動部材１３が駆動さ
れ、針棒駆動部材１３により針棒４及び布押え棒５が上
下に駆動される。このとき、ジャンプカム３２により入
力レバー３６は回動されるが、ソレノイド４３が消磁さ
れているため、入力レバー３６から中間レバー５０への
動力伝達が遮断され、中間レバー５０が引張バネ５８に
よりストッパ５６に保持され、出力レバー６１が停止
し、駆動部６３が受動片１５から離間した位置に保持さ
れている（図３参照）。In the needle bar drive device of the above construction, when one needle bar 4 is indexed to the sewing position by the turntable 3, the pressing piece 16 of the needle bar drive member 13 is inserted into the notch 20 of the needle bar head 6.
Is inserted. Then, the power transmission mechanism 2 is driven by the upper shaft 22.
The lifting body 11 and the needle bar drive member 13 are driven via 9 and the needle bar drive member 13 drives the needle bar 4 and the cloth pressing bar 5 up and down. At this time, the input lever 36 is rotated by the jump cam 32, but since the solenoid 43 is demagnetized, the power transmission from the input lever 36 to the intermediate lever 50 is interrupted, and the intermediate lever 50 is stopped by the tension spring 58. The driving lever 63 is held by 56, the output lever 61 is stopped, and the driving portion 63 is held at a position separated from the passive piece 15 (see FIG. 3).
【００１８】縫製途中の目飛び等に際して、ミシンの制
御装置からジャンプ信号が出力されると、ソレノイド４
３が励磁され、プランジャ４４によりピン４９が引き上
げられ、ピン４９の上端が入力レバー３６の係止片３９
に係合し、中間レバー５０が入力レバー３６に結合され
る。そして、ジャンプカム３２のカム形状に従い、入力
レバー３６、中間レバー５０及び出力レバー６１が連動
して回動され、針棒４の上死点において、駆動部６３に
よって針棒駆動部材１３が針棒４から退避される。これ
により、昇降体１１から針棒４への動力伝達が遮断さ
れ、針棒４が上死点で停止した状態で、昇降体１１及び
針棒駆動部材１３が下降される。When a jump signal is output from the control device of the sewing machine at the time of stitch skipping during sewing, the solenoid 4
3 is excited, the plunger 49 pulls up the pin 49, and the upper end of the pin 49 engages with the locking piece 39 of the input lever 36.
And the intermediate lever 50 is coupled to the input lever 36. Then, the input lever 36, the intermediate lever 50, and the output lever 61 are interlockedly rotated according to the cam shape of the jump cam 32, and at the top dead center of the needle bar 4, the drive section 63 causes the needle bar drive member 13 to move the needle bar drive member 13. 4 is saved. As a result, the power transmission from the lifting body 11 to the needle bar 4 is cut off, and the lifting body 11 and the needle bar drive member 13 are lowered in a state where the needle bar 4 is stopped at the top dead center.
【００１９】昇降体１１の下降から上昇端直前までの区
間は、カムフォロア３７がジャンプカム３２の高所３２
ａ（図５参照）に係合し、針棒駆動部材１３が駆動部６
３により退避位置に保持され、かつ駆動部６３に沿って
昇降案内される。そして、昇降体１１が上昇端の直前に
達すると、カムフォロア３７がジャンプカム３２の低所
３２ｂ（図３参照）に係合し、中間レバー５０及び出力
レバー６１が引張バネ５８により復帰され、針棒駆動部
材１３がスプリング１８により復帰され、昇降体１１の
上昇端で針棒４に係合する。これ以降、ジャンプ信号が
消滅すれば、針棒駆動部材１３が係合位置に保持され、
ジャンプ信号が継続すれば、昇降体１１が下降する直前
に針棒駆動部材１３が針棒４から再び退避される。In the section from the lowering of the lifting / lowering body 11 to immediately before the rising end, the cam follower 37 is located at the high place 32 of the jump cam 32.
a (see FIG. 5) so that the needle bar drive member 13 drives the drive unit 6
It is held at the retracted position by 3 and is guided up and down along the drive unit 63. Then, when the elevating body 11 reaches immediately before the rising end, the cam follower 37 engages with the low portion 32b (see FIG. 3) of the jump cam 32, the intermediate lever 50 and the output lever 61 are returned by the tension spring 58, and the needle The rod drive member 13 is returned by the spring 18 and engages with the needle bar 4 at the rising end of the lifting body 11. After that, if the jump signal disappears, the needle bar drive member 13 is held at the engagement position,
If the jump signal continues, the needle bar drive member 13 is retracted from the needle bar 4 immediately before the lifting body 11 descends.
【００２０】この実施形態の針棒駆動装置によれば、ジ
ャンプカム３２を用いて針棒駆動部材１３を制御するた
め、針棒４の上下運動をその上死点で正確にキャンセル
し、かつ復旧することができる。また、入力レバー３
６、中間レバー５０及び出力レバー６１が共に垂直軸線
の周りで回動して、駆動部６３を水平面内で円運動させ
るので、針棒駆動部材１３の動力受入点が上下方向に変
化しない。このため、針棒駆動部材１３を薄く形成で
き、これを支持する昇降体１１を小型軽量に形成でき
る。従って、これらの昇降部材がミシンヘッドの内部に
占有するスペースを縮小できるとともに、昇降部材の慣
性質量を軽減し、かつ摺動面積を小さくして、高速運転
時の安定性を高めることができる。According to the needle bar drive device of this embodiment, since the jump bar 32 is used to control the needle bar drive member 13, the vertical movement of the needle bar 4 is accurately canceled at its top dead center and restored. can do. Also, input lever 3
6. Since the intermediate lever 50 and the output lever 61 all rotate around the vertical axis to move the drive portion 63 circularly in the horizontal plane, the power receiving point of the needle bar drive member 13 does not change in the vertical direction. Therefore, the needle bar driving member 13 can be thinly formed, and the elevating / lowering body 11 supporting the needle bar driving member 13 can be made small and lightweight. Therefore, it is possible to reduce the space occupied by these lifting members inside the sewing machine head, reduce the inertial mass of the lifting members, reduce the sliding area, and improve the stability during high-speed operation.
【００２１】図７及び図８はジャンプ機構の別の実施形
態を示すものである。このジャンプ機構３１において
は、クラッチ手段として押出型のソレノイド６４が用い
られている。ソレノイド６４のプランジャ６５には、上
限位置を決めるストッパ５９とＯリング５３とが設けら
れている。ロッド４６は圧縮バネ４７により上方へ付勢
され、上端がプランジャ６５に押し付けられている。中
間レバー５０のボス部５１には一対の支持片６６が突設
され、支持片６６にアーム６７が水平ピン６８により揺
動可能に支持されている。アーム６７はその前端がロッ
ド４６の下端に当接するようにスプリング６９によって
付勢され、入力レバー３６にアーム６７の後端を係止す
る係止片７０が下方へ突設されている。7 and 8 show another embodiment of the jump mechanism. In this jump mechanism 31, an extrusion type solenoid 64 is used as a clutch means. The plunger 65 of the solenoid 64 is provided with a stopper 59 that determines the upper limit position and an O-ring 53. The rod 46 is biased upward by the compression spring 47, and the upper end is pressed against the plunger 65. A pair of support pieces 66 are provided to project from the boss portion 51 of the intermediate lever 50, and an arm 67 is swingably supported by a horizontal pin 68 on the support piece 66. The arm 67 is biased by a spring 69 so that its front end contacts the lower end of the rod 46, and a locking piece 70 for locking the rear end of the arm 67 is provided on the input lever 36 so as to project downward.
【００２２】そして、ジャンプ信号に応答しソレノイド
６４が励磁されたときには、押圧ピン５９によりロッド
４６が押し下げられ、ロッド４６の下端によりアーム６
７が揺動され、アーム６７の後端が係止片７０に係合
し、中間レバー５０が入力レバー３６に連動可能に結合
される。また、通常の縫製時には、ソレノイド６４が消
磁され、圧縮バネ４７によりロッド４６が引き上げら
れ、スプリング６９によってアーム６７の後端が係止片
７０から解離され、入力レバー３６から中間レバー５０
への動力伝達が遮断される。その他の構成及び作用効果
は前記実施形態と同様である。When the solenoid 64 is excited in response to the jump signal, the push pin 59 pushes down the rod 46, and the lower end of the rod 46 causes the arm 6 to move.
7 is swung, the rear end of the arm 67 is engaged with the locking piece 70, and the intermediate lever 50 is coupled to the input lever 36 so as to be interlocked. During normal sewing, the solenoid 64 is demagnetized, the compression spring 47 pulls up the rod 46, the spring 69 separates the rear end of the arm 67 from the locking piece 70, and the input lever 36 to the intermediate lever 50.
Power transmission to is cut off. Other configurations and operational effects are similar to those of the above-described embodiment.
【００２３】なお、本発明は前記実施形態に限定される
ものではなく、例えば以下のように、発明の趣旨から逸
脱しない範囲で適宜変更して具体化することもできる。
（１）針棒駆動部材１３の押圧片１６が針棒頭６の切欠
２０にルーズに嵌入するように、切欠２０の上下寸法又
は押圧片１６の厚さを適宜に変更すること。
（２）前記実施形態とは逆に、針棒頭６に突起を設け、
突起が嵌入する切欠を針棒駆動部材１３に形成するこ
と。
（３）出力レバー６１の駆動部６３を短く形成し、退避
位置の針棒駆動部材１３を駆動部６３とは別のガイド部
材で昇降案内すること。
（４）本発明を本縫いミシンや環縫いミシン等、刺繍ミ
シン以外の各種ミシンに適用すること。The present invention is not limited to the above-described embodiment, but may be embodied with various modifications as appropriate without departing from the spirit of the invention, for example. (1) The vertical dimension of the notch 20 or the thickness of the pressing piece 16 is appropriately changed so that the pressing piece 16 of the needle bar drive member 13 fits loosely into the notch 20 of the needle bar head 6. (2) Contrary to the above embodiment, the needle bar head 6 is provided with a protrusion,
Form a notch in the needle bar drive member 13 into which the protrusion fits. (3) The drive part 63 of the output lever 61 is formed to be short, and the needle bar drive member 13 in the retracted position is guided up and down by a guide member different from the drive part 63. (4) Applying the present invention to various sewing machines other than embroidery sewing machines, such as lock stitch sewing machines and chain stitch sewing machines.
【００２４】[0024]
【発明の効果】以上詳述した通り、本発明に係る針棒駆
動装置によれば、昇降体及び針棒駆動部材を小型軽量化
して、ミシンヘッド内部の占有スペースを縮小でき、高
速運転時の安定性を高めることができるという優れた効
果を奏する。As described above in detail, according to the needle bar drive device of the present invention, the lifting body and the needle bar drive member can be made smaller and lighter, the space occupied inside the sewing machine head can be reduced, and high speed operation is possible. It has an excellent effect that the stability can be enhanced.
【図１】本発明に係る針棒駆動装置の一実施形態を示す
ミシンヘッドの断面図である。FIG. 1 is a sectional view of a sewing machine head showing an embodiment of a needle bar driving device according to the present invention.
【図２】同装置のジャンプ機構を示す立面図である。FIG. 2 is an elevational view showing a jump mechanism of the device.
【図３】図２のＡ−Ａ線断面図である。3 is a cross-sectional view taken along the line AA of FIG.
【図４】図３のＢ−Ｂ線断面図である。FIG. 4 is a sectional view taken along line BB of FIG.
【図５】ジャンプ機構の作用を示す断面図である。FIG. 5 is a sectional view showing the operation of the jump mechanism.
【図６】図５のＣ−Ｃ線断面図である。6 is a cross-sectional view taken along the line CC of FIG.
【図７】ジャンプ機構の別の実施形態を示す断面図であ
る。FIG. 7 is a sectional view showing another embodiment of the jump mechanism.
【図８】図７のＤ−Ｄ線断面図である。8 is a cross-sectional view taken along the line DD of FIG.
【図９】従来の針棒駆動装置を示す立面図である。FIG. 9 is an elevational view showing a conventional needle bar driving device.
【図１０】図９のＥ−Ｅ線断面図である。10 is a cross-sectional view taken along the line EE of FIG.
１ フレーム ４ 針棒 ６ 針棒頭 １０ 案内軸 １１ 昇降体 １３ 針棒駆動部材 １４ 垂直ピン ２２ 上軸 ２３ 針棒駆動カム ２９ 動力伝達機構 ３１ ジャンプ機構 ３２ ジャンプカム ３５ 縦軸 ３６ 入力レバー ３７ カムフォロア ３９ 係止片 ４３ ソレノイド ４９ ピン ５０ 中間レバー ５４ 連結ローラ ６０ 垂直軸 ６１ 出力レバー ６３ 駆動部 ６４ ソレノイド ６７ アーム ７０ 係止片 1 frame 4 needle bars 6 needle bar head 10 Guide shaft 11 Lifting body 13 Needle bar drive member 14 vertical pins 22 Upper shaft 23 needle bar drive cam 29 Power transmission mechanism 31 Jump mechanism 32 jump cam 35 Vertical axis 36 Input lever 37 Cam Follower 39 Locking piece 43 solenoid 49 pin 50 Intermediate lever 54 Connection roller 60 vertical axis 61 Output lever 63 Drive 64 solenoid 67 arms 70 Locking piece
Claims (2)
軸に支持された昇降体と、昇降体に水平面内で回動可能
に取り付けられた針棒駆動部材と、ミシンの上軸の動力
を昇降体に伝達する動力伝達機構と、昇降体から針棒へ
の動力伝達を遮断するジャンプ機構とを備え、 前記ジャンプ機構を、上軸に固定されたジャンプカム
と、ジャンプカムにより垂直軸線の周りで回動される入
力レバーと、入力レバーと同じ軸線の周りで回動可能に
設けられた中間レバーと、ジャンプ信号に応答し中間レ
バーを入力レバーに連動可能に結合するクラッチ手段
と、クラッチ手段の結合動作時に中間レバーにより水平
面内で回動される出力レバーとから構成し、出力レバー
に針棒駆動部材を針棒から退避した位置に回動する駆動
部を設けたことを特徴とするミシンの針棒駆動装置。1. A guide shaft erected parallel to the needle bar, a lifting body supported by the guide shaft, a needle bar drive member rotatably attached to the lifting body in a horizontal plane, and a sewing machine top. It comprises a power transmission mechanism for transmitting the power of the shaft to the lifting body, and a jump mechanism for interrupting the power transmission from the lifting body to the needle bar.The jump mechanism is a jump cam fixed to the upper shaft and a jump cam. An input lever rotated about a vertical axis, an intermediate lever rotatably provided about the same axis as the input lever, and a clutch means for coupling the intermediate lever to the input lever in response to a jump signal. And an output lever that is rotated in a horizontal plane by the intermediate lever when the clutch means is engaged, and the output lever is provided with a drive unit that rotates the needle bar drive member to a position retracted from the needle bar. Characteristic Mi Down of the needle bar drive.
る長さで上下に長く形成した請求項１記載のミシンの針
棒駆動装置。2. The needle bar drive device for a sewing machine according to claim 1, wherein the drive portion is vertically elongated with a length corresponding to the stroke of the lifting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001394416A JP3749168B2 (en) | 2001-12-26 | 2001-12-26 | Sewing machine needle bar drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001394416A JP3749168B2 (en) | 2001-12-26 | 2001-12-26 | Sewing machine needle bar drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003190686A true JP2003190686A (en) | 2003-07-08 |
| JP3749168B2 JP3749168B2 (en) | 2006-02-22 |
Family
ID=27601153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001394416A Expired - Fee Related JP3749168B2 (en) | 2001-12-26 | 2001-12-26 | Sewing machine needle bar drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3749168B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575774A (en) * | 2008-05-07 | 2009-11-11 | 株式会社巴鲁丹 | Sewing machine |
| JP2009279078A (en) * | 2008-05-20 | 2009-12-03 | Barudan Co Ltd | Sewing machine |
| JP2012070910A (en) * | 2010-09-28 | 2012-04-12 | Barudan Co Ltd | Multi-needle sewing machine |
| KR101623527B1 (en) | 2008-05-07 | 2016-05-23 | 가부시끼가이샤 바루단 | Sewing machine |
-
2001
- 2001-12-26 JP JP2001394416A patent/JP3749168B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575774A (en) * | 2008-05-07 | 2009-11-11 | 株式会社巴鲁丹 | Sewing machine |
| JP2009268688A (en) * | 2008-05-07 | 2009-11-19 | Barudan Co Ltd | Sewing machine |
| KR101623527B1 (en) | 2008-05-07 | 2016-05-23 | 가부시끼가이샤 바루단 | Sewing machine |
| KR101623529B1 (en) * | 2008-05-07 | 2016-05-23 | 가부시끼가이샤 바루단 | Sewing machine |
| JP2009279078A (en) * | 2008-05-20 | 2009-12-03 | Barudan Co Ltd | Sewing machine |
| JP2012070910A (en) * | 2010-09-28 | 2012-04-12 | Barudan Co Ltd | Multi-needle sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3749168B2 (en) | 2006-02-22 |
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