JPS61159983A - Middle pressing mechanism of sewing machine - Google Patents
Middle pressing mechanism of sewing machineInfo
- Publication number
- JPS61159983A JPS61159983A JP27584184A JP27584184A JPS61159983A JP S61159983 A JPS61159983 A JP S61159983A JP 27584184 A JP27584184 A JP 27584184A JP 27584184 A JP27584184 A JP 27584184A JP S61159983 A JPS61159983 A JP S61159983A
- Authority
- JP
- Japan
- Prior art keywords
- needle
- needle bar
- intermediate presser
- crank rod
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ミシンの中押え機構に関し、特に、上軸が
回転し釣合錘を介してクランクロッドを駆動させクラン
クロッドの運動を針棒抱きと中押え棒抱きとに連動して
針棒と上下軸とを上下動ζせるようにしたミシンの中押
え機構に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an intermediate presser mechanism of a sewing machine, and in particular, the upper shaft rotates and drives a crank rod through a counterweight, and the movement of the crank rod is controlled by the needle bar. This invention relates to an intermediate presser mechanism for a sewing machine in which a needle bar and a vertical shaft can be moved up and down in conjunction with a clamp and an intermediate presser bar clamp.
従来、この種の中押え機構には、!@6図の斜視図に示
すようなものがある。上軸1が回転すると釣合錘2.ク
ランクロッド3.連結軸4.針棒抱き5を介して、針棒
6が機枠7に固定された針棒上メタル8と針棒下メタル
9に案内されて上下動運動を行なうもので、その下端に
は針10が取付けられている。また、上軸1に設けられ
次偏心カム11により偏心カム抱き12け、 軸l 3
. レバーA14を介して揺動軸15を揺動させる。揺
動軸15は、回動可能に機枠7に支承され、先端に連結
されたレバーB16を揺動させる。Conventionally, this type of intermediate presser mechanism had a There is something like the one shown in the perspective view of Figure @6. When the upper shaft 1 rotates, the counterweight 2. Crank rod 3. Connecting shaft 4. A needle bar 6 moves up and down while being guided by a needle bar upper metal 8 and a needle bar lower metal 9 fixed to a machine frame 7 via a needle bar holder 5, and a needle 10 is attached to the lower end of the needle bar 6. It is being In addition, 12 eccentric cams are mounted on the upper shaft 1 and held by a secondary eccentric cam 11, and the shaft l 3
.. The swing shaft 15 is swinged via the lever A14. The swing shaft 15 is rotatably supported by the machine frame 7, and swings a lever B16 connected to its tip.
レバーB16の先端には、長孔部がロリ、その長孔部は
上下軸17に固定された軸18に揺動可能に遊嵌される
。上下軸17は、機枠7に固定され之中押え棒上メタル
19と中押え棒上メタル20とに案内されて上下動を行
なうもので、その下端には中押え片21が取付けられる
。A long hole is provided at the tip of the lever B16, and the long hole is loosely fitted into a shaft 18 fixed to the vertical shaft 17 so as to be swingable. The vertical shaft 17 is fixed to the machine frame 7 and moves up and down guided by an intermediate presser bar upper metal 19 and an intermediate presser bar upper metal 20, and an intermediate presser piece 21 is attached to its lower end.
この種の中押え機構において、カマの捕捉位置は、布の
摩擦抵抗により糸にループが発生し、このループをカマ
先が捕捉して縫目を形成するように針板下で針10の下
死点よりAだけ上昇した位置で行なわれると共に、中押
え片21は、その下死点において布を押えるようになる
のがよい。しかしながら、上述の従来例では、中押え片
21の上下動は上軸1に設けられた偏心カム11を介し
て駆動されているため上軸lの回転角に対し上下軸17
の上下動は針棒6に比し一般に小さく滑らかな定周波の
形状となる。第7図の上軸回転角に対する針棒6と上下
軸17との上下運動曲線で説明すると、
針10が下死点の位置にあると@は、押え片21はB点
にあって押え片21と布との間に隙間がある。In this type of intermediate presser mechanism, the hook is located under the needle 10 under the throat plate so that a loop is generated in the thread due to the frictional resistance of the cloth, and the tip of the hook captures this loop to form a stitch. It is preferable that this is done at a position that is A above the dead center, and that the intermediate presser piece 21 presses the cloth at its bottom dead center. However, in the above-mentioned conventional example, the vertical movement of the intermediate presser piece 21 is driven via the eccentric cam 11 provided on the upper shaft 1.
The vertical movement of the needle bar 6 is generally smaller than that of the needle bar 6 and has a smooth constant frequency wave shape. To explain using the vertical movement curve of the needle bar 6 and the vertical shaft 17 against the rotation angle of the upper shaft in FIG. 7, when the needle 10 is at the bottom dead center position, the presser piece 21 is at point B and the presser piece is There is a gap between 21 and the cloth.
次に、針10が次第に上昇して0点の位置(針1゜の下
死点よりAだけ上昇した点)になると、押え片21は次
第に下降して布との隙間に小さくなってその下死点で布
を確実に押えるようになる。Next, when the needle 10 gradually rises and reaches the 0 point position (the point that is A above the bottom dead center of the needle 1°), the presser foot 21 gradually descends and becomes smaller in the gap with the cloth, and then You will be able to reliably press the cloth at the dead center.
従って、針10の下死点から上昇するとき、図に示すよ
うに中押え片21と布との間に斜線部で示す間隙が生ず
るので、針10が下死点から上昇するとき布と針10と
の摩擦により布が中押え片21の下面に接するまで上昇
する。このため針10の上昇時に布がしごかれて生ずる
ループの大きざが° カマの剣先により捕捉されるだ
けの充分な大きさとならず、″また、ループが捩れてカ
マ剣先に捕捉されず目飛び等を生じる欠点があつ之。Therefore, when the needle 10 rises from the bottom dead center, a gap shown by the shaded area is created between the intermediate presser piece 21 and the cloth as shown in the figure. 10, the cloth rises until it comes into contact with the lower surface of the intermediate presser piece 21. For this reason, the size of the loop that is created when the fabric is squeezed when the needle 10 rises is not large enough to be caught by the tip of the hook, and the loop may be twisted and not caught by the tip of the hook. However, there are drawbacks such as flying.
また、第8図(a) 、 [bJおよびfc) H1針
10・上糸10a・布10b・針板IOCおよび中押え
片21の布押え部21bとの関係を示す作動説明図で、
(a)は針10の下死点状態、(b)はカマひっかけ位
置状態。In addition, FIG. 8(a), [bJ and fc) is an operation explanatory diagram showing the relationship between the H1 needle 10, upper thread 10a, cloth 10b, throat plate IOC, and the intermediate presser piece 21 with the cloth presser part 21b.
(a) shows the needle 10 in its bottom dead center state, and (b) shows it in the hooked position.
(C)は針10の上死点状態を示す。(C) shows the top dead center state of the needle 10.
この従来例においては、布押え部21bは(C)図に示
すように針板10C面上から低い位置であったため、D
部にて布押え部21bとの接触により摩擦抵抗となって
上糸10aの引f!!締めに悪影響をおよぼし糸線り不
良の原因となっていた。In this conventional example, as shown in FIG.
At this point, frictional resistance occurs due to contact with the presser foot 21b, and the needle thread 10a is pulled f! ! This had a negative effect on tightening and caused poor thread alignment.
更に、上軸1から偏心カム11を介して上下軸17を上
下に駆動させる複雑な構成であるため、部品点数が多く
、かつ、組立上多くの工数を労費する等の経済的問題点
もかかえていた。Furthermore, since it has a complicated configuration in which the vertical shaft 17 is driven vertically from the upper shaft 1 via the eccentric cam 11, there are economical problems such as a large number of parts and a large amount of man-hours for assembly. I was holding it.
この発明は、上記した従来の問題点に鑑み為され之もの
であり、その目的は目飛びがなく良好な縫目が得られる
経済的なミシンの中押え機構を提供することにおる。そ
の目的を遂行するために、一端に上軸に回転される釣合
錘に固定したクランク軸に連結する連絡部と他端に駆動
手段を設は之クランクロッド25の運動を針棒抱きと中
押え棒抱きとに連動して針棒と上下軸とを上下動するよ
うに構成し7念。The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an economical intermediate presser mechanism for a sewing machine that can produce good stitches without skipping stitches. In order to accomplish this purpose, a communication part connected to a crankshaft fixed to a counterweight rotated by the upper shaft is provided at one end, and a driving means is provided at the other end. The needle bar and the vertical shaft are configured to move up and down in conjunction with the presser foot holder.
同一構成(相当)は同−付号を付し、以下この発明の実
施例について説明する。第1図において、針棒抱@5.
針棒6.針棒上メタル8.針棒下メタル9.針10は、
従来の針棒機構と同様でるる。Identical configurations (equivalent) are given the same numerals, and embodiments of the present invention will be described below. In FIG. 1, the needle bar holder @5.
Needle bar6. Needle bar upper metal 8. Needle bar lower metal 9. The needle 10 is
It is similar to the conventional needle bar mechanism.
上下軸17は機枠7に固定され之中押え上メタル19と
中押え下メタル20に軸支でれて上下に往復運動を行な
うもので、その下端に針1oの貫通する針孔21aを有
する布押え部21bをもつ中押え片21が螺子22で取
付けられている。23は、中押え棒抱きであり、水千万
回に延出する腕23aに長孔部23bを設け、螺子24
により上下軸17に固着する。The vertical shaft 17 is fixed to the machine frame 7 and pivoted on the upper metal 19 and lower metal 20 of the intermediate presser to reciprocate vertically, and has a needle hole 21a at its lower end through which the needle 1o passes. An intermediate presser piece 21 having a cloth presser portion 21b is attached with a screw 22. Reference numeral 23 denotes an intermediate presser bar holder, in which an elongated hole 23b is provided in an arm 23a that extends over a million times, and a screw 24 is provided.
It is fixed to the vertical shaft 17 by this.
25ば、逆り形をしたクランクロッドであり、その基部
25aに対して互に直角方向に延出する腕25b (!
:椀25Cトを有し、腕25bト腕25C17Cハ連結
部25dと基部25Hに対して垂直方向にコロを回動自
在に遊嵌した軸部よりなる係合片25eとをそれぞれ設
ける。クランクロッド25の腕25bと腕25Cとの間
の基部25aは、針棒6に螺子26で固着これた針棒抱
き5の突出軸5aの段差部に遊嵌し螺子着されると共に
その段差部で抜止的に回動自在に規制される。25 is an inverted crank rod, and arms 25b (!) extend perpendicularly to the base 25a of the crank rod.
: It has a bowl 25C, and arms 25b and 25C17C are each provided with a connecting portion 25d and an engaging piece 25e made of a shaft portion in which a roller is freely rotatably fitted in a direction perpendicular to the base 25H. The base 25a between the arm 25b and the arm 25C of the crank rod 25 is loosely fitted and screwed into the stepped portion of the protruding shaft 5a of the needle bar holder 5, which is fixed to the needle bar 6 with the screw 26. It is regulated so that it can rotate freely in a way that prevents it from coming off.
また、クランクロッド25の腕25Cに設けた係合片2
5eは、中押え棒抱き23の腕23aに設i’jた長孔
部23bに挿嵌し互に係合するように取付ける。Further, the engagement piece 2 provided on the arm 25C of the crank rod 25
5e is fitted into the elongated hole 23b formed in the arm 23a of the intermediate presser bar holder 23 so as to be engaged with each other.
クランクロッド25の腕25bの連結部25dは、釣合
@2の一端に固定したクランク軸27に連結する。A connecting portion 25d of the arm 25b of the crank rod 25 is connected to a crankshaft 27 fixed to one end of the balance @2.
釣合錘2は、ミシンの駆動源(図示しないンにより駆動
される上軸1に固定てれる。ここで、針棒6および中押
え機構の上下軸17の運動tu、上軸1の中心がらクラ
ンク軸27の中・し・までの心間距離で決まる。The counterweight 2 is fixed to an upper shaft 1 driven by a drive source (not shown) of the sewing machine.Here, the movement tu of the needle bar 6 and the vertical shaft 17 of the intermediate presser mechanism, It is determined by the distance between the centers of the crankshaft 27.
作用を説明すると、上軸1が回転し、釣合錘2の回転に
より、釣合錘2に固定されtクランク軸27か円運動し
て、クランク軸27に連結され几クランクロッド25は
上下方向に往復運動を行う。To explain the operation, the upper shaft 1 rotates, and as the counterweight 2 rotates, the crankshaft 27 fixed to the counterweight 2 moves circularly and is connected to the crankshaft 27, and the crank rod 25 moves in the vertical direction. perform a reciprocating motion.
−万、クランクロッド25の基部25aは、針棒抱@5
と回動自在に結合され、また、クランクロッド25の腕
25Cに設けた係合片25eは、中押え棒抱@23の長
孔部23bに摺接可能に係付される。- 10,000, the base 25a of the crank rod 25 is connected to the needle bar holder @5
The engaging piece 25e provided on the arm 25C of the crank rod 25 is slidably engaged with the elongated hole 23b of the intermediate presser bar holder @23.
従って、クランクロッド27が円運動してクランクロッ
ド25の上下方向の往復運動により基部25aを経て針
棒抱@5を介して針棒6を上下動すると共に、他方、係
合片25eを経て中押え棒抱き23を介して上下軸17
を上下動させる。−万、第2図において、クランクロッ
ド25の腕25bおよび腕25Cの長ざを図示のように
それぞれlIおよび12 とする。Therefore, the crank rod 27 moves circularly, and the vertical reciprocating movement of the crank rod 25 causes the needle bar 6 to move up and down via the base 25a and the needle bar holder @5. The vertical shaft 17 is connected via the presser bar holder 23.
move up and down. - In FIG. 2, the lengths of the arms 25b and 25C of the crank rod 25 are 1I and 12, respectively, as shown.
いま、第3図において、クランク軸27(クランクロッ
ド25の連結部25a)が円運動して最下位(180°
)の位置にくると、クランクロッド25の基部25aは
0点、係合片25eはb点にあって針棒6の下端に取付
けられた針10は下死点にある。Now, in FIG. 3, the crankshaft 27 (the connecting portion 25a of the crank rod 25) moves circularly to the lowest position (180°
), the base 25a of the crank rod 25 is at the 0 point, the engaging piece 25e is at the b point, and the needle 10 attached to the lower end of the needle bar 6 is at the bottom dead center.
次に、上軸1が回転してクランクロッド25の連結部2
5d 7!I″−a、点になると、クランクロッド25
の基部25aは01点、係合片25eはす8点にあって
、針10はX、だけ下死点より上昇する。Next, the upper shaft 1 rotates and the connecting portion 2 of the crank rod 25
5d 7! When the point I″-a is reached, the crank rod 25
The base 25a is at the 01 point, the engagement piece 25e is at the 8 point, and the needle 10 is raised by X from the bottom dead center.
従って、クランクロッド25の連結部25dかa点から
a、まで移動したときの針棒6のストo−りは次式で示
される。Therefore, the stroke of the needle bar 6 when the connecting portion 25d of the crank rod 25 moves from point a to point a is expressed by the following equation.
ここで、θは、a@ a、 の中心角、rにクランク
ロッド25の連結部25dの回転半径でるる。Here, θ is the center angle of a@a, and r is the radius of rotation of the connecting portion 25d of the crank rod 25.
また、クランクロッド25の連結部25dがa点からa
、まで移動したとき、クランクロッド25の係合片25
eの位置はb点からす、点に移動する。 従って、上下
軸170ストロークは、×2でろって次式で示される。Also, the connecting portion 25d of the crank rod 25 is moved from point a to point a.
, the engagement piece 25 of the crank rod 25
The position of e moves from point b to point b. Therefore, the stroke of the vertical axis 170 is expressed as x2 by the following equation.
x2= x、 −x、 ここで、 x、 = 12s
inψであるから以上の関係を回転角θに対する針棒6
(X、)および上下軸17(Xt)の上下運動曲線とし
て図示すると第4図に示したようになる。x2= x, -x, where x, = 12s
Since inψ, the above relationship is expressed as needle bar 6 with respect to rotation angle θ.
(X,) and the vertical movement curve of the vertical axis 17 (Xt) as shown in FIG. 4.
即ち、針10の下死点Bの後に鞘厚の下面に対して極め
て僅かな間隙が図示のように存在するようになったので
、針10の下死点Bより直前から 。That is, after the bottom dead center B of the needle 10, an extremely small gap exists with respect to the lower surface of the sheath thickness as shown in the figure, so that from just before the bottom dead center B of the needle 10.
上下軸17の先端に取付けた中押え片21は布の上面を
確実に保持し、針10が針板下でその下死点よりl’l
上昇した位置およびその後も連続的に布の上面を保持す
るようになる。The intermediate presser piece 21 attached to the tip of the vertical shaft 17 securely holds the upper surface of the cloth, and the needle 10 is positioned below the throat plate l'l from its bottom dead center.
The upper surface of the cloth is continuously held in the raised position and thereafter.
従って、針10が、その下死点から上昇するとき、糸ル
ープを捩ったり小感<シ之りすることがなく、カマの剣
先により捕捉されるだけの充分な大きさとなってカマの
剣先に確実に捕捉され、目飛がなく良好な縫目が得られ
る。Therefore, as the needle 10 rises from its bottom dead center, it becomes large enough to be captured by the tip of the hook without twisting or pinching the thread loop. The stitches are reliably captured, and good stitches can be obtained without skipped stitches.
次に、中押え棒抱@23の長孔部23bの長きの選定に
ついて第3図で説明する。−例として、r = 20.
5mm、 l(= 53mm、 12 =16mm
とし、で、クランクロッド25の係止片25eの最下位
点b2を求めて柿2と図示の点線のようになって、θ÷
15゜となる。Next, selection of the length of the elongated hole portion 23b of the intermediate presser bar holder @23 will be explained with reference to FIG. - As an example, r = 20.
5mm, l (= 53mm, 12 = 16mm
Then, find the lowest point b2 of the locking piece 25e of the crank rod 25, and find the lowest point b2 of the locking piece 25e of the crank rod 25, and calculate θ÷
It becomes 15°.
いま、クランクロッド25の連結部25dが、a点から
一回転してa点に戻る間の係止片25eの軌跡は、b点
〜b2点〜b5点〜bn点〜b4点〜b2点〜b点とな
って点線で示される。従って、曲M bt・bnの変化
幅X3が中押え俸抱@23の長孔部23bの長さ方向の
長さとなる。′!!た、上述の説明では、クランクロッ
ド25の@25Cに係合片25eを設けて駆動手段、中
押え俸抱き23の腕23aに長孔部23bを設けて伝達
手段をそれぞれ構成したが、クランクロッド25の腕2
5C方向に長孔部、中押え棒抱き23の腕23aに係合
片をそれぞれ設けて駆動手段と伝達手段とを構成しても
よ匹。Now, the trajectory of the locking piece 25e while the connecting portion 25d of the crank rod 25 makes one rotation from point a and returns to point a is as follows: point b - point b2 - point b5 - point bn - point b4 - point b2 - Point b is indicated by a dotted line. Therefore, the change width X3 of the music M bt·bn becomes the length in the longitudinal direction of the elongated hole portion 23b of the intermediate presser grip @23. ′! ! In addition, in the above explanation, the engaging piece 25e was provided on @25C of the crank rod 25 to constitute the driving means, and the elongated hole portion 23b was provided in the arm 23a of the intermediate presser holder 23 to constitute the transmission means. 25 arms 2
The driving means and the transmission means may be constructed by providing an engaging piece in the elongated hole portion and the arm 23a of the intermediate presser rod holder 23 in the direction 5C.
更に、この発明による中押え片21の布押え部21bの
作動について第5図(al、 (b)および(C)によ
り説明する。(a)は針1oの下死点状態、(blHカ
マひっかけ位置状態、(C)は針1oの上死点状、暢を
示す。Furthermore, the operation of the material presser part 21b of the intermediate presser piece 21 according to the present invention will be explained with reference to FIGS. The position state (C) shows the top dead center position of the needle 1o.
この発明では、クランクロッド25の運動に上り針棒6
(針10)の動PU、(a)、 (b)および(cl
IK、 示す様な運動を行う。従って、布押え部21b
は(C)に示すように9部にて上糸10aを締め上げる
動作を伴い先締りに対して効果的である。In this invention, the movement of the crank rod 25 causes an upward movement of the needle bar 6.
(needle 10) dynamic PU, (a), (b) and (cl
IK, perform the exercises shown. Therefore, the presser foot 21b
As shown in (C), the upper thread 10a is tightened at the 9th section and is effective against tightening.
尚、この発明は、刺しゅうミシンについて説明したが他
のミシンにも発明の主旨に逸脱しない範囲で有効である
。Although the present invention has been described with respect to an embroidery sewing machine, it is also applicable to other sewing machines within the scope of the invention.
更に、クランクロッド25と針棒抱@5および中押え棒
抱き23との結合および係合等については、若干の設計
変更可能なことも包含する。Furthermore, the connection and engagement between the crank rod 25 and the needle bar holder @5 and the intermediate presser bar holder 23 may be slightly modified in design.
この発明は、以上詳述し之ように、上軸Iが回転し釣合
錘2に固定されたクランク軸27が円運動してクランク
ロッド25を上下方向に往復運動させ、針棒抱き5と中
押え棒抱き23とを連動して針棒6を上下動きせると共
に、クランクロッド25の駆動手段と中押え棒抱き23
の伝達手段とが係合して上下軸17を上下動するように
構成した。従って、針lOが下死点から上昇してカマ剣
先が糸のループを捕捉する時点でri確実に中押え片2
1が布の上面を押えるようにしたから、糸ルーズを捩つ
之り、小ざくしたりすることがなくカマ剣先に確実に捕
捉され、目飛びがなく、良好な縫目が得られる。As described in detail above, in this invention, the upper shaft I rotates and the crankshaft 27 fixed to the counterweight 2 moves in a circular motion, causing the crank rod 25 to reciprocate in the vertical direction. The needle bar 6 is moved up and down in conjunction with the intermediate presser bar holder 23, and the driving means of the crank rod 25 and the intermediate presser bar holder 23
The vertical shaft 17 is configured to be engaged with the transmission means to move the vertical shaft 17 vertically. Therefore, when the needle lO rises from the bottom dead center and the tip of the hook catches the thread loop, the intermediate presser piece 2
1 presses the top surface of the cloth, so the loose thread is securely captured by the tip of the hook without twisting or making it small, and good stitches can be obtained without skipping stitches.
1t、上軸1から釣合錘2を介してクランクロッド25
により針棒6および上下軸17を駆動するようにしたの
で、機構が頗る簡単となると共に、針棒6と上下軸17
の振幅が同等となり、そのために、従来から使用されて
いる中押え片21の引き上げ装置(布の出し入れ時に電
磁ソレノイド又は機械的な機構によって中押え片21を
上方に引き上げる装置)は不要になる等の経済的に優れ
た効果がある。1t, crank rod 25 from upper shaft 1 via counterweight 2
Since the needle bar 6 and the vertical shaft 17 are driven by the needle bar 6 and the vertical shaft 17, the mechanism is extremely simple.
The amplitudes of the intermediate presser pieces 21 become the same, and therefore, the conventionally used lifting device for the intermediate presser piece 21 (a device that pulls the intermediate presser piece 21 upward using an electromagnetic solenoid or a mechanical mechanism when loading and unloading cloth) becomes unnecessary, etc. It has excellent economic effects.
更に、中押え片21と針棒6とは、上昇時に同じ高さに
なって可成り上昇するので、被縫物の糸を締め上げるよ
うに作用するから糸のめばれをなくすことが可能となる
等の品質向上に効果がある等の多くの実用的効果を有す
る。Furthermore, since the intermediate presser foot 21 and the needle bar 6 rise to the same height and rise considerably, they act to tighten the threads of the workpiece, making it possible to eliminate thread twisting. It has many practical effects, such as improving quality.
第1図は、本発明の実施例を示す斜視図、第2図は、本
発明の要部であるクランクロッドの正WJ図、第3図は
、不発明の実施例の作動説明図、第4図は、本発明の実
施例の上軸回転角に対する針棒および上下軸の上下運動
曲線、第5図は、不発明の実施例の針・上糸・布・針板
・布押え部との関係を示す作動説明、第6図は、従来例
を示す斜視図、第7図は、従来例の上軸回転角に対する
針棒および上下軸の上下運動曲線、第8図は、従来例の
針・上糸・布・針板・布押え部との関係を示す作動説明
図である。
出願人の名称 東京重機工業株式会社第7図
11 軸 21才押り丼
、/7上下津由
第3図
第4図
第6図
第7図
自発手続補正書
昭和61年1月20日
1、事件の表示
昭和59年臀許願第275841号
2、発明の名称
ミシンの中押え機構
4補正命令の日付 昭和41年1月20日(自発〕
6、補正の内容
第3図の「角度θ」の表示を別紙のとおり訂正する。FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front WJ view of a crank rod which is a main part of the present invention, and FIG. Figure 4 shows the vertical movement curves of the needle bar and the vertical axis relative to the rotation angle of the upper shaft in the embodiment of the invention, and Figure 5 shows the needle, needle thread, fabric, throat plate, and presser foot in the embodiment of the invention. Fig. 6 is a perspective view showing the conventional example, Fig. 7 is the vertical movement curve of the needle bar and the vertical shaft with respect to the upper shaft rotation angle of the conventional example, and Fig. 8 is the vertical movement curve of the conventional example. FIG. 3 is an operation explanatory diagram showing the relationship among the needle, needle thread, cloth, needle plate, and cloth presser foot. Applicant's name Tokyo Heavy Equipment Industry Co., Ltd. Figure 7 Figure 11 Axis 21 year old Oshidon, /7 Yu Shimotsu Figure 3 Figure 4 Figure 6 Figure 7 Voluntary procedure amendment January 20, 1985 1, Indication of the case: 1976 Permit Application No. 275841 2 Name of the invention Intermediate presser mechanism for sewing machines 4 Date of amendment order January 20, 1960 (spontaneous)
6. Details of correction The display of "angle θ" in Figure 3 will be corrected as shown in the attached sheet.
Claims (1)
運動をするクランク軸27と、機枠7に上下動可能に支
持され下端に針10をもつ針棒6と、 針棒6と間隔を置いて併設し前記機枠7に上下動可能に
支持される上下軸17と、上下軸17の下端に前記針1
0の上下通路に貫設し布押え部21bをもつ中押え片2
1と、基部を針棒6に固定した針棒抱き5と、基部を上
下軸17に固定し一端を側方に延出して伝達手段を形成
した中押え棒抱き23と、基部25aを針棒抱き5に回
動自在に遊嵌し、一端を上方に延出してクランク軸27
に回動自在に連結し、他端を側方に延出して中押え棒抱
き23の伝達手段と連結する駆動手段を形成したクラン
クロット25とを備え、 上軸1の回転によりクランクロッド25を上下方向に往
復運動させクランクロッド25の運動を針棒抱き5と中
押え棒抱き23とに連動して針棒6を上下動させると共
に上下軸17を上下動させ針10の下死点直前より先方
まで連続して布の上面を保持するように構成したことを
特徴とするミシンの中押え機構。[Claims] A counterweight 2 rotated by the upper shaft 1, a crankshaft 27 fixed to the counterweight 2 and moving in a circular motion, and a needle 10 supported on the machine frame 7 so as to be movable up and down. a vertical shaft 17 which is provided side by side with the needle bar 6 at a distance and is vertically movably supported by the machine frame 7;
Intermediate presser piece 2 penetrating through the upper and lower passages of 0 and having a cloth presser part 21b
1, a needle bar holder 5 whose base is fixed to the needle bar 6, an intermediate presser bar holder 23 whose base is fixed to the vertical shaft 17 and whose one end extends laterally to form a transmission means, and a base 25a which is fixed to the needle bar 6. The crankshaft 27 is rotatably fitted loosely into the retainer 5 and has one end extending upward.
The crank rod 25 is rotatably connected to the upper shaft 1 and has a crank rod 25 whose other end extends laterally to form a driving means connected to the transmission means of the intermediate presser rod holder 23. The movement of the crank rod 25 is reciprocated in the vertical direction, and the needle bar 6 is moved up and down in conjunction with the needle bar holder 5 and the intermediate presser bar holder 23, and the vertical shaft 17 is also moved up and down, starting just before the bottom dead center of the needle 10. An intermediate presser mechanism for a sewing machine, characterized in that it is configured to continuously hold the upper surface of the cloth all the way to the tip.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27584184A JPS61159983A (en) | 1984-12-29 | 1984-12-29 | Middle pressing mechanism of sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27584184A JPS61159983A (en) | 1984-12-29 | 1984-12-29 | Middle pressing mechanism of sewing machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61159983A true JPS61159983A (en) | 1986-07-19 |
Family
ID=17561176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27584184A Pending JPS61159983A (en) | 1984-12-29 | 1984-12-29 | Middle pressing mechanism of sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61159983A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5373795A (en) * | 1992-10-23 | 1994-12-20 | Brother Kogyo Kabushiki Kaisha | Sewing machine having a presser foot driven independently of a needle bar |
-
1984
- 1984-12-29 JP JP27584184A patent/JPS61159983A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5373795A (en) * | 1992-10-23 | 1994-12-20 | Brother Kogyo Kabushiki Kaisha | Sewing machine having a presser foot driven independently of a needle bar |
CN1037366C (en) * | 1992-10-23 | 1998-02-11 | 兄弟工业株式会社 | Sewing machine |
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