JP5234334B2 - Feeding arm shape flat stitch machine - Google Patents

Feeding arm shape flat stitch machine Download PDF

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JP5234334B2
JP5234334B2 JP2008141606A JP2008141606A JP5234334B2 JP 5234334 B2 JP5234334 B2 JP 5234334B2 JP 2008141606 A JP2008141606 A JP 2008141606A JP 2008141606 A JP2008141606 A JP 2008141606A JP 5234334 B2 JP5234334 B2 JP 5234334B2
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presser
sewing machine
arm
female
head portion
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JP2009285206A (en
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逸夫 酒井
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Yamato Sewing Machine Mfg Co Ltd
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Yamato Sewing Machine Mfg Co Ltd
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Priority to CN 200910142945 priority patent/CN101591841B/en
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Description

本発明は、ミシン主軸を内蔵するミシンアームの先端部に連設されたヘッド部内に、針棒駆動機構を含む各種の駆動機構を備える送り出し腕形偏平縫いミシンに関する。   The present invention relates to a feed-out arm-shaped flat stitch sewing machine having various drive mechanisms including a needle bar drive mechanism in a head portion connected to a tip end portion of a sewing machine arm incorporating a sewing machine main shaft.

例えば、ブリーフ、ショーツの股下部の合わせ縫いに用いられる送り出し腕形偏平縫いミシンは、ミシンフレームの上下部に相異なる方向に延びるミシンアーム及びミシンベッドを夫々備えている。ミシンアームの先端部には、該ミシンアームと略直交する向きにヘッド部が連設してあり、該ヘッド部からミシンベッドの先端に向けて垂下された針棒の下端に複数本の針が取付けてあり、また針棒に近接してヘッド部から垂下された押え棒の下端に押え金が取り付けてある(例えば、特許文献1参照)。   For example, a delivery arm-shaped flat stitch sewing machine used for stitching a crotch part of briefs and shorts is provided with a sewing arm and a sewing bed extending in different directions on the upper and lower parts of the sewing machine frame, respectively. A head portion is connected to the tip portion of the sewing machine arm in a direction substantially orthogonal to the sewing arm, and a plurality of needles are attached to the lower end of a needle bar suspended from the head portion toward the tip of the sewing machine bed. A presser foot is attached to the lower end of the presser bar that is attached and is hung from the head portion in the vicinity of the needle bar (see, for example, Patent Document 1).

送り出し腕形偏平縫いミシンによる合わせ縫いは、縫い合わせるべき2枚の生地の端縁を所定幅に亘って上下に重ね、押え棒の下端に取り付けた押え金とミシンベッドの先端部上面に架設された針板との間に挾持し、ミシンベッド内部の送り機構の動作によりミシンベッドの基端から先端に向かう送りを加えて針落ち位置に送り込み、針棒と共に上下動する複数本の針とミシンベッド内部のルーパとの協調動作により相互に縫い合わせる手順にて行なわれる。   The stitching with the feed-out arm-shaped flat stitch sewing machine is made up of the presser foot attached to the lower end of the presser bar and the top end of the sewing machine bed. Multiple needles that move between the needle plate and the needle bar, and move up and down together with the needle bar by feeding from the base end to the tip of the machine bed by the operation of the feed mechanism inside the machine bed. This is performed in the procedure of sewing together by the cooperative operation with the internal looper.

押え棒は、上下方向への移動可能にヘッド部内に支持されており、押えばねのばね力により下方に付勢されており、この押え棒の下端に取り付けた押え金は、前記押えばねのばね力により針板上に下降して縫製中の生地を押え、また外部からの操作が可能な押え上げ機構により、押えばねのばね力に抗して押え棒を上動させることによって上昇し、生地の押えを解除するように構成してある。押え上げ機構は、ミシンアームの外部に支持され、使用者によって揺動操作される押え上げレバーと、該押え上げレバーの揺動をヘッド部内の押え棒に伝え、該押え棒に押し上げ力を加える押え上げリンクとを備えている。   The presser bar is supported in the head portion so as to be movable in the vertical direction, and is urged downward by the spring force of the presser spring. The presser foot attached to the lower end of the presser bar is a spring of the presser spring. The cloth is being sewn down by the force and presses the fabric being sewn, and the presser lift mechanism that can be operated from the outside raises the presser bar against the spring force of the presser spring, raising the fabric. The presser foot is released. The presser lifting mechanism is supported outside the sewing machine arm and is operated to swing by the user. The presser lifting mechanism transmits the swinging of the presser lifting lever to the presser bar in the head, and applies a lifting force to the presser bar. And a presser foot lifting link.

また送り出し腕形偏平縫いミシンの押え金は、押え棒の下端に取り付けた押え本体の前部に互いに平行をなして延びる一対の押え足を有しており、これらの押え足の夫々に相対向するように保持された固定メス及び可動メスにより、針落ち位置に送り込まれる生地の端縁を切り揃えるように構成されたメス装置を備えている。   The presser foot of the feeding arm-shaped flat stitch sewing machine has a pair of presser feet that extend in parallel with each other at the front part of the presser body attached to the lower end of the presser bar, and these presser feet are opposed to each other. A scalpel device configured to trim the edges of the fabric fed to the needle drop position by the fixed scalpel and the movable scalpel held in such a manner is provided.

メス装置の可動メスは、押え棒の中途に同軸回りでの回動を可能として支持されたメスブラケットに取り付けてあり、該メスブラケットが反復回動することにより、押え金の保持部をガイドとして往復動作して固定メスに摺接し、摺接位置に達した生地の端縁を切り揃える作用をなす。メスブラケットは、ヘッド部の内側に延長され、この延長部に径方向に突出する作動アームを有している。この作動アームは、ミシン主軸からの伝動に応じて所定角度範囲内で反復回動するメス振り軸に連結ロッドを介して連結してあり、メス振り軸の反復回動を連結ロッドを介して作動アームに伝え、前記メスブラケットを反復回動させるメス駆動機構が構成してある。
特公平7−57272号公報
The movable knife of the knife device is attached to a knife bracket that is supported in the middle of the presser bar so that it can be rotated about the same axis. By repeatedly rotating the knife bracket, the holding part of the presser foot is used as a guide. The reciprocating motion makes sliding contact with the fixed knife and cuts and aligns the edge of the cloth that has reached the sliding contact position. The female bracket is extended to the inside of the head portion, and has an operating arm protruding radially in the extended portion. This operating arm is connected via a connecting rod to a female swing shaft that rotates repeatedly within a predetermined angle range in response to transmission from the sewing machine main shaft, and the rotary swing of the female swing shaft is operated via the connecting rod. A knife drive mechanism is configured to transmit to the arm and repeatedly rotate the knife bracket.
Japanese Patent Publication No. 7-57272

以上の如く構成された送り出し腕形偏平縫いミシンは、前述した押え上げ機構を備えており、該押え上げ機構の押え上げリンクは、ミシンアームの外部に位置する押え上げレバーとヘッド部の内側に位置する押え棒とを連結するために、ミシンアームとの連設側となるヘッド部の背面に設けた開口を経てヘッド部内に延設されている。   The feeding arm-shaped flat stitch sewing machine configured as described above is provided with the above-described presser lifting mechanism, and the presser lifting link of the presser lifting mechanism is provided inside the presser lifting lever and the head portion located outside the sewing machine arm. In order to connect the presser bar positioned, the presser bar is extended into the head portion through an opening provided on the back surface of the head portion which is connected to the sewing machine arm.

また送り出し腕形偏平縫いミシンは、前述したメス駆動機構を備えており、該メス駆動機構の連結ロッドは、可動メスの往復動作範囲の調整のために長さ調節可能とする必要がある。そこで従来においては、ミシンアームの先端外部にメス振り軸を突出させ、この突出部に基端を連結した連結ロッドの先端を、押え上げリンクと同様にヘッド部の背面に設けた開口を経てヘッド部内に延長してメス振り軸に連結し、ミシンアームの外側から連結ロッドの長さ調節が行えるようにしてある。   Further, the feeding arm-shaped flat stitch sewing machine includes the above-described knife driving mechanism, and the connecting rod of the knife driving mechanism needs to be adjustable in length in order to adjust the reciprocating range of the movable knife. Therefore, in the prior art, the head of the connecting rod having the base end connected to the protruding portion is projected to the outside of the tip of the sewing machine arm through the opening provided on the back surface of the head portion in the same manner as the presser lifting link. The length of the connecting rod can be adjusted from the outside of the sewing machine arm by extending it into the section and connecting it to the female swing shaft.

更にメス駆動機構のメスブラケットは、特許文献1の図1にも示されているように、ヘッド部の正面を迂回して内側に延長されたコの字形の部材であり、ヘッド部の前面には、メスブラケットを受容する開口が形成されている。   Further, as shown in FIG. 1 of Patent Document 1, the female bracket of the female drive mechanism is a U-shaped member that is detoured around the front of the head and extends inward. Is formed with an opening for receiving the female bracket.

このように送り出し腕形偏平縫いミシンは、ヘッド部の前面及び背面に開口を有しており、これらの開口の存在が、針を上下動させるための針棒駆動機構等、ヘッド部内に設けられる機構の潤滑を難しくする上、縫製環境下に発生する塵埃が前記開口を経てヘッド部内に侵入し、前記機構の動作を阻害する虞れがあって、運転速度の高速化要求に応えることが難しいという問題がある。   Thus, the feeding arm-shaped flat stitch sewing machine has openings on the front and back surfaces of the head part, and the presence of these openings is provided in the head part such as a needle bar drive mechanism for moving the needle up and down. In addition to making the mechanism difficult to lubricate, dust generated in the sewing environment may enter the head portion through the opening and hinder the operation of the mechanism, making it difficult to meet the demand for higher operating speed. There is a problem.

本発明は斯かる事情に鑑みてなされたものであり、ヘッド部内の機構の潤滑を良好に行わせ、またヘッド部内への塵埃の侵入を有効に防止して、運転速度の高速化要求に応え得る送り出し腕形偏平縫いミシンを提供することを目的とする。   The present invention has been made in view of such circumstances, and makes it possible to satisfactorily lubricate the mechanism in the head part and effectively prevent the intrusion of dust into the head part to meet the demand for higher operating speed. It is an object of the present invention to provide a feeding arm-shaped flat stitch sewing machine.

本発明の第1発明に係る送り出し腕形偏平縫いミシンは、ミシンアーム先端のヘッド部に垂下支持された押え棒と、該押え棒の下端に取り付けた押え金と、該押え金に保持された可動メスと、前記ミシンアームの外部に設けた押え上げレバーの揺動を前記ヘッド部の内側に延びる前記押え棒の上部に伝え、前記押え金を上昇させる押え上げ機構と、前記ミシンアームの外部に突出するメス振り軸の往復回動を前記押え棒を支持体として前記ヘッド部内に支持されたメスブラケットに伝え、該メスブラケットの前記ヘッド部の外側への突出端に取り付けた前記可動メスを往復移動させるメス駆動機構とを備える送り出し腕形偏平縫いミシンにおいて、前記ミシンアームに取り付けてあり、前記メス振り軸を前記メスブラケットに連結する連結ロッド及び前記押え上げレバーを前記押え棒に連結する押え上げリンクを外側から覆うカバー部材を備え、前記連結ロッドは、前記メス振り軸との連結端を含む全体を前記カバー部材により覆ってあり、前記押え上げリンクは、前記カバー部材を内外に貫通して延設され、前記押え上げレバーから離れた側の一部を前記カバー部材により覆ってあることを特徴とする。 The feeding arm type flat stitch sewing machine according to the first aspect of the present invention includes a presser bar supported by the head at the tip of the sewing machine arm, a presser foot attached to the lower end of the presser bar, and a presser foot held by the presser foot. A movable knife, a presser lifting mechanism that conveys the swing of a presser lifting lever provided outside the sewing machine arm to the upper part of the presser bar that extends inward of the head unit, and raises the presser foot, and an outer part of the sewing machine arm The reciprocating rotation of the female swinging shaft protruding to the head is transmitted to the female bracket supported in the head portion using the presser bar as a support, and the movable knife attached to the protruding end of the female bracket to the outside of the head portion is used. A feeding arm-shaped flat stitch sewing machine having a reciprocating knife driving mechanism, which is attached to the sewing machine arm and connects the knife swinging shaft to the knife bracket. A cover member for covering the foot lifting link connecting the de and the presser foot lifting lever to the presser bar from the outside, the connecting rod is located across including connecting end of the female swing shaft covered by said cover member the presser foot lifting link is extended through the cover member in and out, a portion of the side away from the presser foot lifting lever and said Rukoto Oh covered by the cover member.

本発明においては、メス振り軸をメスブラケットに連結する連結ロッド、及び押え上げレバーを押え棒に連結する押え上げリンクの外側をカバー部材により覆い、前記連結ロッド及び押え上げリンクをヘッド部内に延設するためにヘッド部の背面に設けられる開口を塞ぎ、ヘッド部内の潤滑を良好に行わせ、ヘッド部内への塵埃の侵入を防止する。カバー部材は、メス振り軸の反復回動に応じて複雑な動作をなす上、潤滑を必要とする連結ロッドについては、メス振り軸との連結端を含む全体を覆う一方、押え上げレバーの揺動に応じて単純な往復動作をなす押え上げリンクについては、押え上げレバーとの連結側から離れた先端側の一部のみを覆うようにしたから、ヘッド部の内外を小サイズのカバー部材により効果的に遮断することができる。 In the present invention, the outer side of the connecting rod for connecting the knife swinging shaft to the knife bracket and the presser lifting link for connecting the presser lifting lever to the presser bar is covered with a cover member, and the connecting rod and the presser lifting link are extended into the head portion. Therefore, the opening provided on the back surface of the head portion is closed, the inside of the head portion is well lubricated, and dust is prevented from entering the head portion. The cover member performs a complex operation in response to repeated rotation of the knife swinging shaft, and for the connecting rod that requires lubrication, the cover member covers the whole including the connection end with the knife swinging shaft, while the presser lifter lever swings. For the presser foot lifting link that performs simple reciprocating motion according to the movement, only a part of the tip side away from the connection side with the presser foot lifting lever is covered. It can be effectively blocked.

本発明の第発明に係る送り出し腕形偏平縫いミシンは、第発明のカバー部材に設けた貫通孔に周着され、該貫通孔を貫通する前記押え上げリンクの周面に弾接するシール板を備えることを特徴とする。 Udegata flat sewing machine feed according to the second aspect of the present invention is Shugi in a through hole provided in the cover member of the first invention, the sealing plate elastic contact with the peripheral surface of the presser foot lifting link through the through hole It is characterized by providing.

本発明の第発明に係る送り出し腕形偏平縫いミシンは、前記カバー部材に設けた貫通孔の周縁部に一端を固定され、該貫通孔を貫通する前記押え上げリンクの中途部に他端を固定されたベローズを備えることを特徴とする。 The feeding arm-type flat stitch sewing machine according to the third aspect of the present invention has one end fixed to the peripheral edge of the through hole provided in the cover member and the other end at the midway part of the presser lifting link passing through the through hole. A fixed bellows is provided.

これらの発明においては、カバー部材を貫通する押え上げリンクの中途部を、ゴム、樹脂等の弾性材料製のシール板又はベローズにより封止し、ヘッド部内の潤滑をより良好に行わせヘッド部内への塵埃の侵入を効果的に防止する。   In these inventions, the midway part of the presser link that penetrates the cover member is sealed with a sealing plate or bellows made of an elastic material such as rubber or resin, and the head part is lubricated more favorably into the head part. Effectively prevent the intrusion of dust.

本発明の第発明に係る送り出し腕形偏平縫いミシンは、前記ヘッド部に取り付けてあり、該ヘッド部の外側への前記メスブラケットの突出部を覆う第2のカバー部材を備えることを特徴とする。 Udegata flat sewing machine feed according to a fourth aspect of the present invention, is attached to said head portion, and further comprising a second cover member that covers the protruding portion of the female bracket to the outside of the head portion To do.

この発明においては、ヘッド部の外側へのメスブラケットの突出部を第2のカバー部材により覆い、メスブラケットを外部に延長するためにヘッド部の正面に設けた開口の少なくとも一部を塞ぎ、ヘッド部内への塵埃の侵入を防止する。   In the present invention, the protruding portion of the female bracket to the outside of the head portion is covered with the second cover member, and at least a part of the opening provided in the front of the head portion is closed to extend the female bracket to the outside. Prevents dust from entering the unit.

本発明に係る送り出し腕形偏平縫いミシンにおいては、メス駆動機構及び押え上げ機構の構成部材を通すためにヘッド部に設けられる開口をカバー部材により塞いだから、ヘッド部内の機構の潤滑を良好に行わせ、またヘッド部内への塵埃の侵入を有効に防止することができ、針を上下動させるための針棒駆動機構等、ヘッド部内に設けられる高速動作する機構を良好に潤滑し、またヘッド部内への塵埃の侵入を確実に防止することができ、運転速度の高速化要求に応えることが可能となる等、本発明は優れた効果を奏する。   In the feeding arm type flat stitch sewing machine according to the present invention, the opening provided in the head portion for passing the constituent members of the knife driving mechanism and the presser foot lifting mechanism is closed by the cover member, so that the mechanism in the head portion is well lubricated. In addition, the intrusion of dust into the head portion can be effectively prevented, and a mechanism that operates at a high speed, such as a needle bar drive mechanism for moving the needle up and down, is well lubricated. The present invention has excellent effects, such as being able to reliably prevent dust from entering and meeting the demand for higher operating speed.

以下本発明をその実施の形態を示す図面に基づいて詳述する。図1は、本発明に係る送り出し腕形偏平縫いミシンの全体構成を示す外観斜視図である。   Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is an external perspective view showing the overall configuration of a delivery arm type flat stitch sewing machine according to the present invention.

図示の如く送り出し腕形偏平縫いミシンは、ミシンフレーム1の上部に一方向に延びるミシンアーム10を備え、ミシンフレーム1の下部にミシンアーム10と異なる方向に延びる細幅筒型のミシンベッド11を備えている。ミシンアーム10の先端部には、該ミシンアーム10と略直交する向きに、中空の矩形ブロック状をなすヘッド部12が連設してある。   As shown in the figure, the delivery arm-shaped flat stitch sewing machine includes a sewing machine arm 10 extending in one direction at the upper part of the sewing machine frame 1 and a narrow cylindrical sewing machine bed 11 extending in a different direction from the sewing machine arm 10 at the lower part of the sewing machine frame 1. I have. A head portion 12 having a hollow rectangular block shape is connected to the tip of the sewing machine arm 10 in a direction substantially orthogonal to the sewing machine arm 10.

ヘッド部12の下方には、相対向するミシンベッド11の先端部に向けて押え棒13が垂下支持され、該押え棒13の下端部に押え金14が取り付けてある。押え棒13は、後述のように、上下動可能に支持されている。押え金14は、押え棒13の下動によりミシンベッド11の先端部に架設された針板15の上に下降し、該針板15との間に図示しない生地を挾持する。押え金14と針板15との間に挾持された生地は、ミシンベッド11の内部に設けた図示しない送り機構の動作により、ミシンベッド11の基部から先端側に向かう送りを加えられ、この送りに同期して上下動する複数本の針(図示せず)により合わせ縫いされる。   Below the head portion 12, a presser bar 13 is supported in a suspended manner toward the tip of the sewing bed 11 facing each other, and a presser foot 14 is attached to the lower end of the presser bar 13. The presser bar 13 is supported so as to be movable up and down as will be described later. The presser foot 14 descends onto a needle plate 15 installed at the tip of the sewing machine bed 11 by the downward movement of the presser bar 13, and holds a cloth (not shown) between the presser foot 15 and the needle plate 15. The cloth held between the presser foot 14 and the needle plate 15 is fed from the base of the sewing machine bed 11 toward the tip side by the operation of a feeding mechanism (not shown) provided inside the sewing machine bed 11, and this feed is applied. Are stitched together by a plurality of needles (not shown) that move up and down in synchronization with the sewing machine.

押え金14は、ミシンベッド11の基部(生地の導入側)に向けて延びる左右一対の押え足14a,14a を備えており、これらの押え足 14a,14aに、固定メス16及び可動メス17(図3参照)を備えるメス装置が装備されている。   The presser foot 14 is provided with a pair of left and right presser feet 14a, 14a extending toward the base (fabric introduction side) of the sewing machine bed 11. The presser foot 14a, 14a includes a fixed knife 16 and a movable knife 17 ( A scalpel device is provided with (see FIG. 3).

図1中には、固定メス16の基部が図示されている。固定メス16は、一方の押え足 14aに固定保持された板状のメスであり、他方の押え足 14bに向けて突出する先端部に刃を有している。可動メス17は、他方の押え足 14bに保持されており、後述の如く構成されたメス駆動機構の動作により、押え足 14a,14bと略直交する方向に往復動作し、固定メス16の刃に摺接して、公知のように、押え足 14a,14bの間に相互に合わせた状態で導入される生地の端縁を切り揃える。切り揃えられた生地は、メス装置の下流側に位置するガイド手段の作用により上下に重ねられ、針落ち位置に送り込まれて縫い合わされる。   In FIG. 1, the base of the fixed knife 16 is shown. The fixed knife 16 is a plate-like knife fixedly held by one presser foot 14a, and has a blade at a tip portion protruding toward the other presser foot 14b. The movable knife 17 is held by the other presser foot 14b and reciprocates in the direction substantially orthogonal to the presser legs 14a, 14b by the operation of the knife driving mechanism configured as described below, and moves to the blade of the fixed knife 16. As is well known, the edges of the fabric to be introduced are aligned between the presser feet 14a and 14b in a sliding manner. The trimmed fabrics are piled up and down by the action of the guide means located on the downstream side of the scalpel device, sent to the needle drop position and stitched together.

図2は、押え棒13の支持構造を示す断面図である。図示の如く押え棒13は、ヘッド部12の下壁 12bを上下方向に貫通する下ブッシュ2に回動筒20を介して支持されている。下ブッシュ2は、ヘッド部12と一体又は別体に構成することができる。押え棒13の上部は、ヘッド部12の上壁 12aを上下方向に貫通する上ブッシュ3に挿通支持されている。このように押え棒13は、上ブッシュ3と下ブッシュ2とにより上下に離隔した2箇所を支持されており、これらのブッシュ3,2による案内下にて上下動することができる。   FIG. 2 is a cross-sectional view showing a support structure for the presser bar 13. As shown in the figure, the presser bar 13 is supported by a lower bush 2 passing through the lower wall 12 b of the head portion 12 in the vertical direction via a rotating cylinder 20. The lower bush 2 can be formed integrally or separately with the head portion 12. The upper part of the presser bar 13 is inserted and supported by the upper bush 3 that penetrates the upper wall 12a of the head part 12 in the vertical direction. In this way, the presser bar 13 is supported at two locations separated vertically by the upper bush 3 and the lower bush 2, and can move up and down under the guidance of these bushes 3 and 2.

上ブッシュ3の上部は、ヘッド部12の外側に適長突出され、この突出端部に調節ねじ30が螺合されている。該調節ねじ30の下端部と押え棒13の上端部との間には、コイルばねを用いてなる押えばね31が介装されている。押えばね31は、押え棒13に下向きのばね力を加え、押え棒13の下端部に取り付けた押え金14を下向きに付勢する。なお図4中には、押え金14の図示を省略してある。   The upper portion of the upper bush 3 protrudes to the outside of the head portion 12 by an appropriate length, and an adjusting screw 30 is screwed to the protruding end portion. A presser spring 31 using a coil spring is interposed between the lower end of the adjusting screw 30 and the upper end of the presser bar 13. The presser spring 31 applies a downward spring force to the presser bar 13 and biases the presser foot 14 attached to the lower end portion of the presser bar 13 downward. In FIG. 4, the presser foot 14 is not shown.

押えばね31のばね力の大きさは、調節ねじ30の上端に設けたつまみ32を回転操作し、調節ねじ30のねじ込み量を変えることにより調節することができる。この調節は、押え金14と針板15との間での生地の押え力を変更すべく実施され、調節された押え力は、調節ねじ30の中途に設けたロックナット33を締め付けることにより維持することができる。   The magnitude of the spring force of the presser spring 31 can be adjusted by rotating the knob 32 provided at the upper end of the adjusting screw 30 and changing the screwing amount of the adjusting screw 30. This adjustment is performed to change the presser force of the cloth between the presser foot 14 and the needle plate 15, and the adjusted presser force is maintained by tightening a lock nut 33 provided in the middle of the adjusting screw 30. can do.

押え棒13の中途部には、下ブッシュ2による支持位置と上ブッシュ3による支持位置との間に押え棒ホルダ4が固定してあり、この押え棒ホルダ4の後側には、略水平な支軸41の周りでの揺動自在に揺動レバー40が枢支してある。揺動レバー40は、前方に延びて押え棒ホルダ4の下面に当接する作用片42を備えている。   A presser bar holder 4 is fixed in the middle of the presser bar 13 between a support position by the lower bush 2 and a support position by the upper bush 3, and the rear side of the presser bar holder 4 is substantially horizontal. A swing lever 40 is pivotally supported so as to be swingable around the support shaft 41. The swing lever 40 includes an action piece 42 that extends forward and contacts the lower surface of the presser bar holder 4.

また支持部から上方に延びる揺動レバー40の先端には、図中に2点鎖線により示す押え上げリンク43の一端が連結されている。押え上げリンク43の他端は、ヘッド部12の後部外側に延長されており、ミシンアーム10の先端部外面に支持された押え上げレバー44に後述するように連結されている。図1中には、押え上げレバー44と押え上げリンク43の連結部分が図示されている。   In addition, one end of a presser foot lifting link 43 indicated by a two-dot chain line in the drawing is connected to the tip of a swing lever 40 extending upward from the support portion. The other end of the presser foot lifting link 43 is extended to the rear outer side of the head portion 12 and is connected to a presser foot lifting lever 44 supported on the outer surface of the tip end portion of the sewing machine arm 10 as described later. In FIG. 1, a connecting portion between the presser lifting lever 44 and the presser lifting link 43 is shown.

押え上げレバー44は、揺動レバー40と平行な軸回りに揺動可能に支持され、作業者による適宜の操作に応じて所定角度揺動するように構成された操作レバーであり、作業者は、押え金14を上昇させる場合に押え上げレバー44を揺動操作する。押え上げレバー44の揺動は、公知のように、膝押し板、足踏みペダル等の操作端の操作を、リンク、ワイヤ等の機械的な伝動手段により伝えて行わせることができ、また作業者によるスイッチ操作に応じたアクチュエータの動作によって行わせることもできる。   The presser foot lifting lever 44 is an operation lever that is supported so as to be swingable about an axis parallel to the swing lever 40 and is configured to swing a predetermined angle in accordance with an appropriate operation by the operator. When the presser foot 14 is raised, the presser foot lifting lever 44 is swung. As is well known, the presser foot lifting lever 44 can be operated by operating the operation end of the knee push plate, the foot pedal, etc. by mechanical transmission means such as a link or a wire. It can also be performed by the operation of the actuator in accordance with the switch operation.

押え上げレバー44の揺動操作は、押え上げリンク43を介して揺動レバー40に伝えられ、該揺動レバー40は、図2中に矢符により示すように反時計回りに揺動する。この揺動により揺動レバー40に設けられた作用片42が押えホルダ4に作用し、該押え上げホルダ4を介して押え棒13が押し上げられ、該押え棒13の下端に取り付けた押え金14が上昇する。このように押え金14を上昇させる押え上げ操作は、縫製前の生地を針板15上にセットする際、又は縫製を終えた生地を針板15上から取り外す際に行われる。   The swinging operation of the presser lifting lever 44 is transmitted to the swinging lever 40 via the presser lifting link 43, and the swinging lever 40 swings counterclockwise as indicated by an arrow in FIG. By this swinging, the action piece 42 provided on the swing lever 40 acts on the presser holder 4, the presser bar 13 is pushed up via the presser lifter holder 4, and the presser foot 14 attached to the lower end of the presser bar 13. Rises. The presser foot raising operation for raising the presser foot 14 in this way is performed when setting the cloth before sewing on the needle plate 15 or when removing the cloth after sewing from the needle plate 15.

なお押え棒ホルダ4は、押え棒13の一側に、これと平行をなして設けたガイド棒に係合されており、押え棒13の軸回りの回転を拘束する作用を併せて行う。この作用により押え金14は、針板15との間に挾持する生地からの作用力により回転する虞れがない。   The presser bar holder 4 is engaged with a guide bar provided on one side of the presser bar 13 in parallel with the presser bar 13, and also performs an action of restricting the rotation of the presser bar 13 about its axis. Due to this action, the presser foot 14 is not likely to rotate due to the action force from the fabric held between the needle plate 15 and the presser foot 15.

押え棒13と下ブッシュ2との間に介装された回動筒20は、下ブッシュ2の上下に適長突出している。ヘッド部12の外側に突出する回動筒20の下端部には、フックブラケット21が設けてあり、このフックブラケット21は、押え金14の上部に設けた飾り糸機構22(図1参照)に連結してある。またヘッド部12の内側に延びる回動筒20の上端部には、連結ブラケット23が嵌着されている。連結ブラケット23は、ミシンアーム10の内部の駆動機構に連結ロッド(図示せず)を介して連結されている。   A rotating cylinder 20 interposed between the presser bar 13 and the lower bush 2 protrudes at an appropriate length above and below the lower bush 2. A hook bracket 21 is provided at the lower end portion of the rotating cylinder 20 protruding outside the head portion 12, and this hook bracket 21 is attached to a decorative thread mechanism 22 (see FIG. 1) provided on the upper part of the presser foot 14. It is connected. A connection bracket 23 is fitted to the upper end portion of the rotating cylinder 20 extending inside the head portion 12. The connection bracket 23 is connected to a drive mechanism inside the sewing machine arm 10 via a connection rod (not shown).

以上の構成により回動筒20は、上端部の連結ブラケット23に伝えられる前記駆動機構の動作に応じて軸回りに反復回動し、この反復回動は、回動筒20の下端に設けたフックブラケット21を介して飾り糸機構22に伝えられる。飾り糸機構22は、フックブラケット21からの伝動により、縫製中の生地の上面に飾り糸を配置する公知の動作をなす。   With the above configuration, the rotating cylinder 20 is repeatedly rotated around the axis according to the operation of the drive mechanism transmitted to the connection bracket 23 at the upper end, and this repeated rotation is provided at the lower end of the rotating cylinder 20. This is transmitted to the decorative thread mechanism 22 via the hook bracket 21. The decoration thread mechanism 22 performs a known operation of arranging the decoration thread on the upper surface of the cloth being sewn by transmission from the hook bracket 21.

図3は、可動メス17を往復動作させるメス駆動機構の斜視図である。図中18は、メス駆動機構の駆動軸としてのメス振り軸である。該メス振り軸18は、ミシンアーム10の内部に横架支持され、ミシン主軸8(図4、図5参照)からの伝動により、所定の角度範囲内にて軸回りに反復回動する回動軸である。メス振り軸18の一端部には、径方向外向きに延びる揺動アーム19が固着してある。該揺動アーム19は、メス振り軸18の反復回動に応じて揺動する。   FIG. 3 is a perspective view of a scalpel drive mechanism that reciprocates the movable scalpel 17. In the figure, 18 is a female swing shaft as a drive shaft of the female drive mechanism. The knife swinging shaft 18 is supported horizontally in the sewing machine arm 10 and rotated repeatedly around the shaft within a predetermined angle range by transmission from the sewing machine main shaft 8 (see FIGS. 4 and 5). Is the axis. A swing arm 19 that extends radially outward is fixed to one end of the knife swing shaft 18. The swing arm 19 swings in response to repeated rotation of the knife swing shaft 18.

図中5は、メスブラケットである。メスブラケット5は、コの字形の連結体50により連結され、同軸上に適長離れて並ぶ円筒形の支持筒5a,5bを備えている。一方の支持筒5aには、径方向外向きに延びる作動アーム51が設けてあり、他方の支持筒5bには、固定ブラケット52が設けてある。   In the figure, 5 is a female bracket. The female bracket 5 is connected by a U-shaped connecting body 50, and includes cylindrical support cylinders 5a and 5b that are coaxially arranged at an appropriate distance. One support cylinder 5a is provided with an operating arm 51 extending radially outward, and the other support cylinder 5b is provided with a fixing bracket 52.

図2に示すようにメスブラケット5は、ヘッド部12の内側に突出する後述の回動筒20の上部に一方の支持筒5aを外嵌し、回動筒20の上端の連結ブラケット23と下ブッシュ2の上面との間に挾持する一方、ヘッド部12の外側に突出する回動筒20の下部に他方の支持筒5bを外嵌し、下ブッシュ2の下面と回動筒20の下端のフックブラケット21との間に挾持して、両支持筒5a,5bの連結体50が、ヘッド部12の前面(図2における右側端面)を迂回してヘッド部12の内外を連絡するように取付けてある。   As shown in FIG. 2, the female bracket 5 is configured such that one support cylinder 5 a is fitted on the upper part of a later-described rotating cylinder 20 that protrudes inside the head portion 12, and the upper end of the connecting cylinder 23 and the lower end of the rotating cylinder 20. The other supporting cylinder 5b is fitted on the lower part of the rotating cylinder 20 which is held between the upper surface of the bush 2 and protrudes to the outside of the head portion 12, and the lower surface of the lower bush 2 and the lower end of the rotating cylinder 20 are It is mounted between the hook bracket 21 so that the connecting body 50 of both support cylinders 5a and 5b bypasses the front surface of the head portion 12 (the right end surface in FIG. 2) and communicates the inside and outside of the head portion 12. It is.

以上の如く取付けられたメスブラケット5は、回動筒20を介して押え棒13に支えられ、該押え棒13と同軸上にて回動することができる。なお、支持筒5a,5bと、下ブッシュ2及び回動筒20との間には滑り板を夫々介装し、メスブラケット5の回動が滑らかに生じるようになしてある。   The female bracket 5 attached as described above is supported by the presser bar 13 via the rotary cylinder 20 and can be rotated coaxially with the presser bar 13. A sliding plate is interposed between the support cylinders 5a and 5b, the lower bush 2 and the rotary cylinder 20, so that the female bracket 5 can be smoothly rotated.

上部の支持筒5aに設けられた作動アーム51は、図3に示すように、玉継手60,60を備える両端に連結ロッド6によりメス振り軸18の揺動アーム19に連結してある。以上の構成によりメスブラケット5は、揺動アーム19、連結ロッド6及び作動アーム51を介して伝えられるメス振り軸18の反復回動に応じて軸回りに反復回動する。連結ロッド6の両端の玉継手60,60は、図3に示すように、ねじによる軸長方向の位置調節を可能として取り付けてある。この位置調節は、連結ロッド6の長さを変え、後述の如く生じる可動メス17の往復動作範囲を微調整するために実施される。この調節を可能とするため、メス振り軸18と作動アーム51とを連結する連結ロッド6は、後述の如く、ミシンアーム10の先端部外側に配してある。   As shown in FIG. 3, the operating arm 51 provided on the upper support cylinder 5 a is connected to the swing arm 19 of the female swing shaft 18 by the connecting rod 6 at both ends including the ball joints 60, 60. With the above configuration, the female bracket 5 repeatedly rotates around the axis in accordance with the repeated rotation of the female swing shaft 18 transmitted through the swing arm 19, the connecting rod 6, and the operating arm 51. As shown in FIG. 3, the ball joints 60 and 60 at both ends of the connecting rod 6 are attached so as to be capable of adjusting the position in the axial direction by screws. This position adjustment is carried out to change the length of the connecting rod 6 and finely adjust the reciprocating range of the movable knife 17 which will be described later. In order to make this adjustment possible, the connecting rod 6 that connects the knife swinging shaft 18 and the operating arm 51 is arranged outside the front end of the sewing machine arm 10 as will be described later.

下部の支持筒5bに設けた固定ブラケット52は、図3に示すように、前方に迂回するように延び、この延長端から更に下向きに延びる固定座53を備えている。固定座53には、メス台54を介して前記可動メス17が取り付けてある。可動メス17は、長手方向の一端に刃を有する板状のメスであり、前記メス台54に他端を固定し、押え棒13の前位置に、該押え棒13と略直交するように取り付けてある。   As shown in FIG. 3, the fixing bracket 52 provided on the lower support cylinder 5 b includes a fixing seat 53 that extends around the front and extends further downward from the extended end. The movable knife 17 is attached to the fixed seat 53 via a knife base 54. The movable knife 17 is a plate-shaped knife having a blade at one end in the longitudinal direction, the other end is fixed to the knife base 54, and is attached to the front position of the presser bar 13 so as to be substantially orthogonal to the presser bar 13. It is.

このように取付けられた可動メス17は、前述したように、押え金14の一方の押え足 14bに設けたガイド部に通し、該押え足 14bと略直交する方向に往復動作可能に保持されている。可動メス17の往復動作は、メスブラケット5の反復回動に伴う固定ブラケット52の揺動に応じて前記ガイド部による案内下にて生じる。可動メス17は、メス台54に設けたコイルばね55により下向きに押圧付勢されている。コイルばね55は、固定メス16への可動メス17の押し付けを強化し、両メス16,17の摺接位置での生地の切断を確実に行わせる作用をなす。   As described above, the movable knife 17 attached in this way is passed through the guide portion provided on one presser foot 14b of the presser foot 14, and is held so as to be able to reciprocate in a direction substantially perpendicular to the presser foot 14b. Yes. The reciprocating motion of the movable knife 17 occurs under the guidance of the guide portion in response to the swing of the fixed bracket 52 accompanying the repeated rotation of the knife bracket 5. The movable knife 17 is urged downward by a coil spring 55 provided on the knife table 54. The coil spring 55 strengthens the pressing of the movable knife 17 against the fixed knife 16 and acts to surely cut the fabric at the sliding contact position of both the knife 16, 17.

図1、図2に示すように、ヘッド部12の前面を封止する前板7の下部には、下縁に連続する矩形の開口70が設けてある。この開口70は、メスブラケット5の上下の支持筒5a,5bを連結するコの字形の連結体50を揺動範囲よりも大きい幅を有しており、メスブラケット5の連結体50は、前記開口70を通してヘッド部12の前面に延出され、図2に示すように下方に延長されてヘッド部12の内外に位置する前記支持筒5a,5bを連結している。   As shown in FIGS. 1 and 2, a rectangular opening 70 continuous with the lower edge is provided in the lower portion of the front plate 7 that seals the front surface of the head portion 12. The opening 70 has a width larger than the swing range of the U-shaped connecting body 50 that connects the upper and lower support cylinders 5a and 5b of the female bracket 5, and the connecting body 50 of the female bracket 5 The support cylinders 5a and 5b extending to the front surface of the head portion 12 through the opening 70 and extending downwardly and positioned inside and outside the head portion 12 as shown in FIG.

前板7の下部前面には、前カバー(第2のカバー部材)71が取付けてある。この前カバー71は、図1及び図2に示すように、前板7に開設された前記開口70の前面を、該開口70の幅及び長さ方向の全域に亘って覆っている。従って、メスブラケット5の揺動を可能としながらヘッド部12の内外の連通を十分に遮断することができ、ヘッド部12内への塵埃の侵入を防止し、またヘッド部12内の潤滑を、外部への潤滑剤の漏れ出しを生じることなく実施することができる。   A front cover (second cover member) 71 is attached to the lower front surface of the front plate 7. As shown in FIGS. 1 and 2, the front cover 71 covers the front surface of the opening 70 formed in the front plate 7 over the entire width and length of the opening 70. Accordingly, the internal and external communication of the head portion 12 can be sufficiently blocked while allowing the female bracket 5 to swing, preventing dust from entering the head portion 12, and lubricating the head portion 12. This can be carried out without causing leakage of the lubricant to the outside.

図4及び図5は、ミシンアーム10の先端部の外観斜視図である。図4に示すようにミシンアーム10の先端部には、ミシン主軸8が突設され、突設端部に嵌着された伝動プーリ80を介してミシンモータ(図示せず)に連結されており、ミシン主軸8の突出部の一側は、図5に示すように側面カバー9(カバー部材)により覆ってある。   4 and 5 are external perspective views of the distal end portion of the sewing machine arm 10. As shown in FIG. 4, a sewing machine main shaft 8 protrudes from the tip of the sewing machine arm 10 and is connected to a sewing machine motor (not shown) via a transmission pulley 80 fitted to the protruding end. As shown in FIG. 5, one side of the protruding portion of the sewing machine main shaft 8 is covered with a side cover 9 (cover member).

図4は、側面カバー9を取り外した状態が示されており、本図に示す如くミシンアーム10の先端部には、ミシン主軸8の突設部の一側にメス振り軸18の端部が突出しており、この突出端部に前記揺動アーム19が固着されている。この揺動アーム19には、前述の如く連結ロッド6の一端部が連結してあり、該連結ロッド6は、ミシンアーム10の先端面に沿って前方(図4における右方)に延び、ヘッド部12の内部に、背面に設けた開口部を経て挿入され、図3に示すように、メスブラケット5に連結されており、メス振り軸18からの伝動により可動メス17を往復動作させる前述したメス駆動機構が構成されている。   FIG. 4 shows a state in which the side cover 9 is removed. As shown in this figure, the end of the female swing shaft 18 is located at the tip of the sewing machine arm 10 at one side of the protruding portion of the sewing machine main shaft 8. The swing arm 19 is fixed to the projecting end portion. As described above, one end of the connecting rod 6 is connected to the swing arm 19, and the connecting rod 6 extends forward (to the right in FIG. 4) along the front end surface of the sewing machine arm 10, and the head As described above, it is inserted into the inside of the portion 12 through the opening provided on the back surface, and is connected to the female bracket 5 as shown in FIG. 3, and the movable knife 17 is reciprocated by transmission from the knife swinging shaft 18 as described above. A knife drive mechanism is configured.

以上の如く配された連結ロッド6は、外部から長さ調節することができ、前述した可動メス17の往復動作範囲を微調整することが可能である。連結ロッド6の下位置には、油受けパン61が取付けてある。油受けパン61は、前方を下とした適宜の傾斜を有してヘッド部12の内部に延長されており、メス振り軸18の支持部、揺動アーム19と連結ロッド6との連結部等から漏れ落ちる潤滑用の油を受け、底面の傾斜によってヘッド部12内に戻す作用をなす。   The length of the connecting rod 6 arranged as described above can be adjusted from the outside, and the reciprocating range of the movable knife 17 can be finely adjusted. An oil receiving pan 61 is attached below the connecting rod 6. The oil receiving pan 61 has an appropriate inclination with the front facing down and is extended inside the head portion 12, and includes a support portion for the female swing shaft 18, a connecting portion between the swing arm 19 and the connecting rod 6, and the like. It receives the lubricating oil leaking from the head and returns it into the head portion 12 by the inclination of the bottom surface.

またミシンアーム10の先端部には、後部上面にレバー台45が固着してあり、該レバー台45に、前述した押え上げ機構の押え上げレバー44が取付けられている。押え上げレバー44は、図示のようなL字形のアームであり、屈曲部に設けた支軸46によりレバー台45に枢支してあり、上方に延びる一辺の中途に押え上げリンク43の一端が連結されている。   A lever base 45 is fixed to the upper surface of the rear part at the front end of the sewing machine arm 10, and the presser lifting lever 44 of the presser lifting mechanism described above is attached to the lever base 45. The presser lift lever 44 is an L-shaped arm as shown in the figure, and is pivotally supported by a lever base 45 by a support shaft 46 provided at a bent portion, and one end of the presser lift link 43 extends in the middle of one side extending upward. It is connected.

更にミシンアーム10の先端部には、前述した押え上げ機構の揺動レバー40が、ヘッド部12の内側に位置して枢支してある。この揺動レバー40には、ミシンアーム10の先端面に沿って前方に延び、ヘッド部12内に侵入する前記押え上げリンク43の他端部が連結されており、前述したように、押え上げレバー44の揺動操作を押え上げリンク43を介して揺動レバー40に伝え、該揺動レバー40を揺動させて押え金14を上昇させる押え上げ機構が構成されている。   Further, the rocking lever 40 of the presser lifting mechanism described above is pivotally supported on the inner side of the head portion 12 at the front end portion of the sewing machine arm 10. The swing lever 40 is connected to the other end portion of the presser lifting link 43 that extends forward along the front end surface of the sewing machine arm 10 and enters the head portion 12. A presser lifting mechanism is configured to transmit the swinging operation of the lever 44 to the swinging lever 40 via the presser lifting link 43 and swing the swinging lever 40 to raise the presser foot 14.

図4に示すように側面カバー9は、以上のようにミシンアーム10の先端部外側に配されたメス駆動機構の連結ロッド6の全部を揺動アーム19との連結部及びメス振り軸18の突出部を含めて覆い、同じく押え上げリンク43の押え上げレバー44から離れた側の一部を覆い得る形状を有する箱形のカバーであり、周縁の一部に設けたブラケット90をミシンアーム10の端面に設けたねじ孔に締め付け固定し、図5に示すように、ヘッド部12の背面の開口を全域に亘って閉止するように装着されている。   As shown in FIG. 4, the side cover 9 has the connecting rod 6 of the female drive mechanism arranged on the outer side of the distal end portion of the sewing machine arm 10 as described above and the connecting portion with the swing arm 19 and the female swing shaft 18. A box-shaped cover having a shape that covers the protrusion and covers the part of the presser lift link 43 on the side away from the presser lift lever 44. A bracket 90 provided on a part of the periphery is attached to the sewing machine arm 10. As shown in FIG. 5, it is mounted so that the opening on the back surface of the head portion 12 is closed over the entire area.

押え上げリンク43の先端部は、側面カバー9の該当位置に設けた貫通孔91に通して側面カバー9の内部に延長されており、図4に示すように揺動レバー40に連結されている。前記貫通孔91の周縁には、ゴム、軟質樹脂等の弾性材料製のシール板が周設され、貫通孔91に挿通された押え上げリンク43の中途部外周に弾接させてあり、押え上げレバー44の挿通部を封止してある。   The front end of the presser foot lifting link 43 is extended into the side cover 9 through a through hole 91 provided at a corresponding position of the side cover 9, and is connected to the swing lever 40 as shown in FIG. . A sealing plate made of an elastic material such as rubber or soft resin is provided around the periphery of the through hole 91, and is elastically contacted with the outer periphery of the middle part of the presser lifting link 43 inserted through the through hole 91. The insertion part of the lever 44 is sealed.

本発明に係る送り出し腕形偏平縫いミシンにおいては、以上のように装着された側面カバー9を備えており、該側面カバー9が、メス駆動機構の連結ロッド6及び押え上げ機構の押え上げリンク43を延長するためにヘッド部12の背面に設けられる開口を塞ぎ、この開口によるヘッド部12の内外の連通を遮断している。従って、針棒駆動機構等、ヘッド部12の内部に設けられる各種の運動機構の潤滑を、潤滑剤の漏れ出しの虞れなく良好に行わせることができ、またヘッド部12内への塵埃の侵入を防止することが可能であり、運転速度の高速化に対応することができる。   The delivery arm type flat stitch sewing machine according to the present invention includes the side cover 9 mounted as described above, and the side cover 9 includes the connecting rod 6 of the female drive mechanism and the presser lifting link 43 of the presser lifting mechanism. In order to extend the distance, an opening provided in the back surface of the head portion 12 is closed, and communication between the inside and the outside of the head portion 12 by this opening is blocked. Accordingly, various types of motion mechanisms provided in the head unit 12 such as the needle bar drive mechanism can be lubricated satisfactorily without the risk of lubricant leakage, and dust in the head unit 12 can be prevented. It is possible to prevent intrusion, and it is possible to cope with an increase in operating speed.

側面カバー9は、図4、図5に示す形状に限らず、連結ロッド6及び押え上げリンク43の一部又は全部を覆い、ヘッド部12の背面の開口を塞ぎ得る適宜の形状とすることができる。図4、図5に示す側面カバー9は、連結ロッド6の外側を、メス振り軸18の突出部を含めて覆っており、メス振り軸18の支持部、揺動アーム19と連結ロッド6との連結部に必要な潤滑をも良好に行わせることができる。   The side cover 9 is not limited to the shape shown in FIGS. 4 and 5, and may have an appropriate shape that covers a part or all of the connecting rod 6 and the presser lifting link 43 and can close the opening on the back surface of the head portion 12. it can. The side cover 9 shown in FIGS. 4 and 5 covers the outside of the connecting rod 6 including the protruding portion of the female swing shaft 18, the support portion of the female swing shaft 18, the swing arm 19 and the connecting rod 6. It is possible to satisfactorily perform the necessary lubrication on the connecting portion.

押え上げリンク43は、一部のみを覆ってあるが、この押え上げリンク43は、押え上げレバー44の揺動に応じて軸長方向に移動する単純な動作をなすのみであり、押え上げリンク43のわずかの振れを許容し得る小径の貫通孔91を設けるだけで対応することができ、ヘッド部12の内外の連通を有効に遮断することができる。また前述したシール板の配置により押え上げリンク43の挿通部を封止する構成により、押え上げリンク43の運動を阻害せずにヘッド部12の内外をより確実に遮断することができるから、ヘッド部12内の潤滑を良好に実施し、ヘッド部12内への塵埃の侵入を確実に防止して、運転速度の高速化に寄与することができる。   The presser foot lifting link 43 covers only a part, but this presser foot lifting link 43 only performs a simple operation of moving in the axial direction in response to the swing of the presser foot lifting lever 44. It is possible to cope with this by simply providing a small-diameter through hole 91 that can allow slight deflection of 43, and the internal and external communication of the head portion 12 can be effectively blocked. In addition, the configuration in which the insertion portion of the presser lift link 43 is sealed by the arrangement of the seal plate described above enables the head portion 12 to be more reliably shut off from inside and outside without hindering the movement of the presser lift link 43. Lubrication in the portion 12 can be carried out satisfactorily, dust can be reliably prevented from entering the head portion 12, and the operation speed can be increased.

なお、図4、図5に示す側面カバー9は、周縁の一箇所に固定用のブラケット90を備えるように図示されているが、周縁の複数箇所に同様のブラケットを備え、夫々をミシンアーム10の先端面にねじ止め固定するのが望ましい。側面カバー9の周縁とヘッド部12の開口部との密着部、及び側面カバー9の周縁とミシンアーム10の先端面との密着部の一方又は両方にシール手段を介装することにより、側面カバー9の内外をより確実に封止することが可能となるが、このシール手段の介装は必須ではない。   The side cover 9 shown in FIGS. 4 and 5 is shown as having a fixing bracket 90 at one location on the periphery, but similar brackets are provided at a plurality of locations on the periphery, and each has a sewing arm 10. It is desirable to fix to the front end surface of the screw. By attaching sealing means to one or both of the contact portion between the peripheral edge of the side cover 9 and the opening of the head portion 12 and the close contact portion between the peripheral edge of the side cover 9 and the front end surface of the sewing machine arm 10, a side cover is provided. Although it becomes possible to seal the inside and outside of 9 more reliably, the interposition of this sealing means is not essential.

図6は、本発明の他の実施の形態を示すミシンアーム10の先端部の外観斜視図である。本図においても、ミシンアーム10の先端部外面には、押え上げリンク43及び連結ロッド6の外側を覆い、ヘッド部12の背面の開口を塞ぐように側面カバー9が装着してある。この実施の形態において、押え上げリンク43は、丸棒状のリンクであり、該当位置に設けた貫通孔(図示せず)を通して側面カバー9の内部に延長されており、押え上げリンク43の挿通部は、前記開口の周縁部に一端を固定され、押え上げリンク43の中途部に他端を固定されたベローズ92により封止してある。   FIG. 6 is an external perspective view of the distal end portion of the sewing machine arm 10 showing another embodiment of the present invention. Also in this figure, a side cover 9 is attached to the outer surface of the tip end portion of the sewing machine arm 10 so as to cover the outer side of the presser lifting link 43 and the connecting rod 6 and close the opening of the back surface of the head portion 12. In this embodiment, the presser lifting link 43 is a round bar-like link, and is extended into the side cover 9 through a through hole (not shown) provided at the corresponding position. Is sealed with a bellows 92 having one end fixed to the peripheral edge of the opening and the other end fixed to the midway part of the press-up link 43.

ベローズ92は、わずかな振れを伴って生じる押え上げリンク43の往復動作に追随変形することができ、押え上げリンク43の動作を許容しながら、側面カバー9の内外、即ち、ヘッド部12の内外の連通をより確実に遮断することができる。   The bellows 92 can be deformed following the reciprocating motion of the presser foot lifting link 43 that occurs with slight swinging, and while allowing the motion of the presser foot lifting link 43, the inside and outside of the side cover 9, that is, the inner and outer sides of the head portion 12 Can be blocked more reliably.

本発明に係る送り出し腕形偏平縫いミシンの外観斜視図である。1 is an external perspective view of a delivery arm-shaped flat stitch sewing machine according to the present invention. 押え棒の支持構造を示す断面図である。It is sectional drawing which shows the support structure of a presser bar. 可動メスを往復動作させるメス駆動機構の斜視図である。It is a perspective view of the knife drive mechanism which reciprocates a movable knife. 側面カバーを取り外した状態を示すミシンアームの先端部の外観斜視図である。It is an external appearance perspective view of the front-end | tip part of the sewing machine arm which shows the state which removed the side cover. 側面カバーを取り付けた状態を示すミシンアームの先端部の外観斜視図である。It is an external appearance perspective view of the front-end | tip part of the sewing machine arm which shows the state which attached the side cover. 本発明の他の実施の形態を示すミシンアーム10の先端部の外観斜視図である。FIG. 5 is an external perspective view of a tip end portion of a sewing machine arm 10 showing another embodiment of the present invention.

符号の説明Explanation of symbols

5 メスブラケット
6 連結ロッド
8 側面カバー(カバー部材)
10 ミシンアーム
12 ヘッド部
13 押え棒
14 押え金
17 可動メス
18 メス振り軸
43 押え上げリンク
44 押え上げレバー
71 前面カバー(第2のカバー部材)
91 貫通孔
92 ベローズ
5 Female bracket 6 Connecting rod 8 Side cover (cover member)
10 Sewing arm
12 Head
13 Presser bar
14 Presser foot
17 Movable knife
18 Female swing shaft
43 Presser lifter link
44 Presser lifter lever
71 Front cover (second cover member)
91 Through hole
92 Bellows

Claims (4)

ミシンアーム先端のヘッド部に垂下支持された押え棒と、該押え棒の下端に取り付けた押え金と、該押え金に保持された可動メスと、前記ミシンアームの外部に設けた押え上げレバーの揺動を前記ヘッド部の内側に延びる前記押え棒の上部に伝え、前記押え金を上昇させる押え上げ機構と、前記ミシンアームの外部に突出するメス振り軸の往復回動を前記押え棒を支持体として前記ヘッド部内に支持されたメスブラケットに伝え、該メスブラケットの前記ヘッド部の外側への突出端に取り付けた前記可動メスを往復移動させるメス駆動機構とを備える送り出し腕形偏平縫いミシンにおいて、
前記ミシンアームに取り付けてあり、前記メス振り軸を前記メスブラケットに連結する連結ロッド及び前記押え上げレバーを前記押え棒に連結する押え上げリンクを外側から覆うカバー部材を備え
前記連結ロッドは、前記メス振り軸との連結端を含む全体を前記カバー部材により覆ってあり、
前記押え上げリンクは、前記カバー部材を内外に貫通して延設され、前記押え上げレバーから離れた側の一部を前記カバー部材により覆ってあることを特徴とする送り出し腕形偏平縫いミシン。
A presser bar supported by the head at the tip of the sewing machine arm, a presser foot attached to the lower end of the presser bar, a movable knife held by the presser bar, and a presser lifting lever provided outside the sewing machine arm. Oscillation is transmitted to the upper part of the presser bar extending inward of the head part to support the presser bar and a presser lifting mechanism for raising the presser foot and a reciprocating rotation of a female swinging shaft protruding outside the sewing machine arm. In a delivery arm type flat stitch sewing machine comprising: a female drive mechanism that transmits to a female bracket supported in the head portion as a body and reciprocally moves the movable knife attached to the projecting end of the female bracket to the outside of the head portion ,
Wherein it is attached to the sewing machine arm, a cover member for covering the connecting rod and presser foot lifting links for connecting the presser foot lifting lever to the presser bar to couple the female swing shaft to the female bracket from the outside,
The connecting rod covers the whole including the connecting end with the female swing shaft by the cover member,
The presser foot lifting link, wherein through the cover member into and out extends, said part of the side away from the presser foot lifting lever feed characterized Oh isosamples covered by the cover member Udegata flat sewing machine .
前記カバー部材に設けた貫通孔に周着され、該貫通孔を貫通する前記押え上げリンクの周面に弾接するシール板を備える請求項に記載の送り出し腕形偏平縫いミシン。 The delivery arm-shaped flat stitch sewing machine according to claim 1 , further comprising a seal plate that is circumferentially attached to a through hole provided in the cover member and elastically contacts a peripheral surface of the presser lifting link that passes through the through hole. 前記カバー部材に設けた貫通孔の周縁部に一端を固定され、該貫通孔を貫通する前記押え上げリンクの中途部に他端を固定されたベローズを備える請求項に記載の送り出し腕形偏平縫いミシン。 The delivery arm-shaped flat according to claim 1 , further comprising a bellows having one end fixed to a peripheral portion of a through-hole provided in the cover member and the other end fixed to a middle portion of the presser lifting link passing through the through-hole. Sewing machine. 前記ヘッド部に取り付けてあり、該ヘッド部の外側への前記メスブラケットの突出部を覆う第2のカバー部材を備える請求項1乃至請求項のいずれかに記載の送り出し腕形偏平縫いミシン。 The delivery arm-shaped flat stitch sewing machine according to any one of claims 1 to 3 , further comprising a second cover member attached to the head portion and covering a protruding portion of the female bracket to the outside of the head portion.
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TW098114359A TWI456098B (en) 2008-05-29 2009-04-30 Curved wrist flat sewing machine
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JP2585640Y2 (en) * 1993-05-07 1998-11-25 ヤマトミシン製造株式会社 Sewing machine top feeder
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