JP4822193B2 - Box bed double chain stitch machine - Google Patents

Box bed double chain stitch machine Download PDF

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JP4822193B2
JP4822193B2 JP2009108327A JP2009108327A JP4822193B2 JP 4822193 B2 JP4822193 B2 JP 4822193B2 JP 2009108327 A JP2009108327 A JP 2009108327A JP 2009108327 A JP2009108327 A JP 2009108327A JP 4822193 B2 JP4822193 B2 JP 4822193B2
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sewing machine
needle plate
bed
knife
needle
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JP2010227527A (en
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透 勢力
竜一郎 木下
高幸 林田
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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 TW99106402A priority patent/TWI410544B/en
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Description

本発明は、押え金との間に縫製生地を挾持する針板の両側に、縫製生地を載置するための平坦な上面を有する箱形のベッドを備える二重環縫いミシンに関する。   The present invention relates to a double chain stitch sewing machine including a box-shaped bed having a flat upper surface for placing a sewing fabric on both sides of a needle plate that holds the sewing fabric between the presser foot and the presser foot.

工業用ミシンの一形式として、箱形ベッド二重環縫いミシンがある。このミシンは、針板の両側に平坦な上面を有する箱形のベッドを備えている。ベッドの平坦な上面は、針板の両側で縫製生地を安定して支持し、作業者が縫製中の生地を支える手間を軽減する。従って箱形ベッド二重環縫いミシンは、大判の縫製生地を縫製する用途に好便に用いることができる。一部の箱形ベッド二重環縫いミシンは、針板よりも先端側のベッドが、平坦な上面を含む筒形としてあり、この種のミシンは、中筒タイプの箱形ベッド二重環縫いミシンと称される。   One type of industrial sewing machine is a box bed double chain stitch machine. The sewing machine includes a box-shaped bed having flat upper surfaces on both sides of a needle plate. The flat upper surface of the bed stably supports the sewing fabric on both sides of the needle plate, and reduces the labor for the operator to support the fabric being sewn. Therefore, the box bed double chain stitch sewing machine can be conveniently used for sewing large-sized sewing fabrics. Some box bed double chain stitch machines have a cylindrical shape with a flat upper surface at the tip side of the needle plate. This type of sewing machine is a medium cylinder type box bed double chain stitch. It is called a sewing machine.

工業用ミシンの他の形式として、送り出し腕形偏平縫いミシンがある。このミシンはミシンフレームの下部に一方向に延びる細幅筒形のミシンベッドを備え、ミシンフレームの上部にミシンベッドと異なる方向に延びるミシンアームを備えている。送り出し腕形偏平縫いミシンは、例えば、ブリーフ、ショーツの股下部分の合わせ縫いに用いる。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、ミシンベッド上の針板と、該針板上に降下する押え金との間に送り込んで実施する。   As another type of industrial sewing machine, there is a feeding arm type flat stitch sewing machine. This sewing machine has a narrow cylindrical sewing bed extending in one direction at the lower part of the sewing machine frame, and a sewing arm extending in a different direction from the sewing machine bed at the upper part of the sewing machine frame. The delivery arm-shaped flat stitch sewing machine is used, for example, for the stitching of the crotch part of briefs and shorts. The stitching is performed by overlapping the edges of the two fabrics to be sewn up and down over a predetermined width and feeding them between the needle plate on the sewing machine bed and the presser foot lowered on the needle plate.

送り出し腕形偏平縫いミシンは、メス機構を装備した特殊な押え金を備えている(例えば、特許文献1参照)。この押え金は、押え金本体と2つの押え足とを有する。押え本体は、針板との間で縫製生地を挾持する。2つの押え足は、押え本体の前方に、互いに平行をなして延びている。メス機構は、一方の押え足に固定した固定メスと、他方の押え足に取付けた可動メスとを備える。固定メスと可動メスとは、押え本体に設定した針落ち位置(針が下降する位置)の前で対向させてある。   The feeding arm-shaped flat stitch sewing machine includes a special presser foot equipped with a knife mechanism (see, for example, Patent Document 1). This presser foot has a presser foot main body and two presser feet. The presser body holds the sewing fabric with the needle plate. The two presser feet extend parallel to each other in front of the presser body. The knife mechanism includes a fixed knife fixed to one presser foot and a movable knife attached to the other presser foot. The fixed knife and the movable knife are opposed to each other in front of the needle drop position (position where the needle is lowered) set in the presser body.

可動メスは、ミシンアームの内部のメス振り軸からの伝動によって往復動作し、固定メスに摺接するように構成してある。可動メスは、押え足の外側に一部を突出するように取付けてあり、メス振り軸からの伝動機構は、可動メスの突出部分に連結してある。   The movable knife is configured to reciprocate by transmission from a knife swinging shaft inside the sewing machine arm and to slidably contact the fixed knife. The movable knife is attached so as to partially protrude outside the presser foot, and the transmission mechanism from the knife swinging shaft is connected to the protruding part of the movable knife.

縫製生地は、縫い合わせる側の端縁を相互に合わせ、針板上に立てた状態で2つの押え足の間に送り込む。縫製生地の端縁は、固定メス及び可動メスの摺接位置に達して切り揃えられる。押え本体は、切り揃えた生地の端縁を上下に重ねて針落ち位置に送り込む。このミシンにおいては、作業者の手作業による重ね幅の調整が不要であり、略一定の縫い幅を有する合わせ縫いを安定して実施することができる。   The sewing fabric is fed between two presser feet with the edges on the sewing side aligned with each other and standing on the needle plate. The edge of the sewing fabric reaches the sliding contact position of the fixed knife and the movable knife and is trimmed. The presser body is fed to the needle entry position with the edges of the trimmed fabrics stacked one above the other. In this sewing machine, it is not necessary to adjust the overlap width by an operator's manual operation, and it is possible to stably carry out the stitching having a substantially constant sewing width.

特公平7ー57272号公報Japanese Patent Publication No. 7-57272

以上のような合わせ縫いは、箱形ベッド二重環縫いミシンにおいても実施される。箱形ベッド二重環縫いミシンにおいては、前述したように、ベッド上で縫製生地が安定して支えられることから、従来一般的には、針板の前位置で作業者の手作業により重ね幅を調整して合わせ縫いを実施しており、作業者の熟練に応じて仕上がり状態に差が出るという問題がある。   The above-described stitching is also performed in a box-type bed double chain stitch machine. In a box-type bed double chain stitch machine, as described above, since the sewing fabric is stably supported on the bed, conventionally, the overlap width is manually set by the operator at the front position of the needle plate. As a result, the stitching is carried out by adjusting the sewing machine, and there is a problem that the finished state varies depending on the skill of the operator.

この問題は、送り出し腕形偏平縫いミシンが備えるメス機構付きの押え金を適用することで解消されるが、箱形ベッド二重環縫いミシンのベッドは、前述したように、大判の縫製生地を支えることを目的として、針板の両側に拡がる平坦な上面を有している。また、送り出し腕形偏平縫いミシンが備えるメス機構付きの押え金は、前述したように、押え金の一側に突出する可動メスを有し、この突出部分に伝動機構が連結してあるため、この押え金を箱形ベッド二重環縫いミシンに適用した場合、可動メスの伝動機構は、箱形ベッドの上面の近くで動作することとなる。   This problem can be solved by applying the presser foot with the knife mechanism that the feed arm flat stitch sewing machine has, but the bed of the box-type double-ring stitch machine has a large sewing fabric as described above. For the purpose of support, it has a flat upper surface that extends on both sides of the needle plate. In addition, the presser foot with a knife mechanism provided in the feed arm flat stitch sewing machine has a movable knife projecting to one side of the presser foot as described above, and the transmission mechanism is connected to this projecting portion. When this presser foot is applied to a box-type bed double chain stitch sewing machine, the transmission mechanism of the movable knife operates near the upper surface of the box-type bed.

一方、縫製作業中の作業者は、一般的に、押え金の両側の近くで縫製生地を手で押え、送りの方向に押すことで、該縫製生地の送りを補助している。このような送りの補助は、箱形ベッド二重環縫いミシンにおいて取り扱う大判の縫製生地の縫製作業において特に重要である。   On the other hand, an operator who is performing a sewing operation generally assists the feeding of the sewing fabric by pressing the sewing fabric by hand near both sides of the presser foot and pressing it in the feeding direction. Such feeding assistance is particularly important in the sewing work of large sewing fabrics handled in a box bed double chain stitch sewing machine.

ところが、箱形ベッド二重環縫いミシンにメス機構付きの押え金を適用した場合には、押え金の一側では可動メスの伝動機構が動作しており、また押え金の他側には、固定メスの一部が突出していることから、前述した送りの補助を実施することが難しく、縫製作業に支障を来す虞れがある。   However, when a presser foot with a knife mechanism is applied to a box bed double chain stitch sewing machine, the transmission mechanism of the movable knife operates on one side of the presser foot, and on the other side of the presser foot, Since a part of the fixed knife protrudes, it is difficult to carry out the above-described feeding assistance, and there is a possibility that the sewing work may be hindered.

一方、作業者は、大判の縫製生地を送り出し腕形偏平縫いミシンを用いて合わせ縫いすることも可能である。しかしながら、送り出し腕形偏平縫いミシンは、細径の筒形ベッドを備えており、大判の縫製生地の合わせ縫いを実施しようとする場合、筒形ベッドによる縫製生地の支えが不十分であることから、作業者は、縫製生地の全体を支えることを強いられ、良好に縫製作業を実施することは難しい。   On the other hand, the operator can send out a large sewing fabric and sew it together using an arm-shaped flat stitch sewing machine. However, the feeding arm type flat stitch sewing machine has a small cylindrical bed, and when trying to carry out stitching of a large sewing fabric, the support of the sewing fabric by the cylindrical bed is insufficient. The operator is forced to support the entire sewing fabric, and it is difficult to perform the sewing work well.

本発明は斯かる事情に鑑みてなされたものであり、縫製生地の端縁を切り揃えるメス機構付きの押え金を備えることにより、作業者の熟練程度の如何に拘らず良好な仕上がりで合わせ縫いを実施することができ、更に、押え金の両側で作業者が実施する送り補助作業に支障を来すことのない箱形ベッド二重環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 is provided with a presser foot with a knife mechanism for trimming the edges of the sewing fabric, so that the stitching can be performed with a good finish regardless of the skill level of the operator. It is another object of the present invention to provide a box bed double chain stitch sewing machine that does not hinder the feeding assist work performed by the operator on both sides of the presser foot.

本発明の第1発明に係る箱形ベッド二重環縫いミシンは、針板の幅方向の両側に縫製生地を載置するための平坦な上面を有する箱形のベッドと、該ベッドの上方のミシンアームに垂下支持した針棒及び押え棒と、該針棒及び押え棒の下端に夫々取付けた針及び押え金と、前記針板の下側の前記ベッドの内部に設けた送り機構及びルーパとを備え、前記押え棒と共に降下する前記押え金が前記針板の上に押え、前記送り機構が前記針板の長手方向の送りを加える縫製生地を、前記針棒と共に上下動する前記針と、前記送りの方向と平行な支軸を中心として前記針板の下面に沿って揺動する前記ルーパとにより縫製する箱形ベッド二重環縫いミシンにおいて、前記押え金は、前記針板の上面に沿って前記送りの方向と交叉する向きに往復移動する可動メスと該可動メスに摺接する固定メスとを有するメス機構を備え、前記ベッドの上面は、前記針板の一側又は両側において、該針板の上面よりも低くしてあることを特徴とする。 A box-shaped bed double chain stitch sewing machine according to a first aspect of the present invention includes a box-shaped bed having a flat upper surface for placing a sewing fabric on both sides in the width direction of a needle plate, and an upper portion of the bed. A needle bar and a presser bar supported by the sewing machine arm; a needle and a presser foot respectively attached to the lower ends of the needle bar and the presser bar; a feed mechanism and a looper provided in the bed below the needle plate; The needle that descends together with the presser bar is pressed onto the needle plate, and the needle that moves up and down together with the needle bar, the sewing fabric to which the feed mechanism applies the feed in the longitudinal direction of the needle plate, In a box bed double chain stitch sewing machine that is sewn by the looper that swings along the lower surface of the needle plate around a support shaft parallel to the feed direction, the presser foot is placed on the upper surface of the needle plate. Reciprocate along the direction crossing the feed direction Comprising a knife mechanism having a sliding contact with the fixed knife in moving knife and movable knife, the upper surface of the bed, in one side or both sides of the needle plate, characterized Citea Rukoto lower than the upper surface of the needle plate And

また第発明に係る箱形ベッド二重環縫いミシンは、前記ベッドの上面と前記針板の上面とが、前記針板の両側に前記ルーパの揺動域との干渉を避けて設けた段差部によって連続させてあることを特徴とする。 The box-type bed double chain stitch sewing machine according to the second aspect of the present invention is the step provided between the upper surface of the bed and the upper surface of the needle plate so as to avoid interference with the swinging area of the looper on both sides of the needle plate. It is characterized by being continuous by the part.

また第発明に係る箱形ベッド二重環縫いミシンは、前記ミシンアームの内部に設けたメス振り軸と、該メス振り軸の反復回動を前記可動メスに伝え、該可動メスを往復移動させる伝動機構とを備えることを特徴とする。 Further, the box bed double chain stitch sewing machine according to the third aspect of the present invention transmits the knife swinging shaft provided inside the sewing machine arm and the repetitive rotation of the knife swinging shaft to the movable knife, and the movable knife is moved back and forth. And a transmission mechanism.

また第発明に係る箱形ベッド二重環縫いミシンは、第発明における伝動機構が、前記ミシンアームの下部を上下方向に貫通して支持してあり、前記押え棒の下部を支持する支持ブッシュを内嵌保持する伝動筒と、前記ミシンアームの内部に位置する前記伝動筒の上部に前記メス振り軸の反復回動を伝える伝動リンクとを備え、前記ミシンアームの外部に突出する前記伝動筒の下部に、前記可動メスの取り付け部を設けてあることを特徴とする。 The fourth box-shaped bed double chain stitch sewing machine according to the invention, the transmission mechanism in the third invention, Yes supported through the lower portion of the sewing machine arm in the vertical direction, the support for supporting the lower portion of the presser bar The transmission that includes a transmission cylinder that fits and holds a bush, and a transmission link that transmits repetitive rotation of the female swing shaft to the upper part of the transmission cylinder that is located inside the sewing machine arm, and that protrudes outside the sewing machine arm. A mounting portion for the movable knife is provided at a lower portion of the tube.

本発明の第1発明に係る箱形ベッド二重環縫いミシンにおいては、針板の上に縫製生地を押える押え金に、固定メス及び可動メスを有するメス機構を設け、更に、箱形をなすベッドの上面を、針板の一側又は両側において針板の上面よりも低くして、ベッドの上面と押え金の外側への可動メスの突出部分との間に隙間を確保したから、作業者は、前記隙間内で縫製生地に手を添えて送りを補助し、大判の縫製生地の合わせ縫いを、熟練を要することなく良好な品質で実施することが可能となる。 In the box bed double chain stitch sewing machine according to the first aspect of the present invention, the presser foot that holds the sewing fabric on the needle plate is provided with a knife mechanism having a fixed knife and a movable knife , and further has a box shape. the upper surface of the bed, in one side or both sides of the needle plate and lower than the upper surface of the needle plate, to ensure a gap between the protruding portion of the movable knife to the upper surface and the outer presser foot bed treasure, worker In this gap, a hand is attached to the sewing fabric within the gap to assist the feeding, and it becomes possible to carry out the stitching of the large sewing fabric with good quality without requiring skill .

また第発明に係る箱形ベッド二重環縫いミシンにおいては、針板の上面と箱形ベッドの上面とを、箱形ベッド内で揺動するルーパの揺動域を避けて設けた段差部によって連続させてあるから、大判の縫製生地を安定して支えて合わせ縫いを実行することができる。 In the box bed double chain stitch sewing machine according to the second aspect of the invention, the step portion provided between the upper surface of the needle plate and the upper surface of the box bed avoiding the swinging area of the looper swinging in the box bed. Therefore, the large-sized sewing fabric can be stably supported and stitched together.

また第発明に係る箱形ベッド二重環縫いミシンにおいては、ミシンアームの内部のメス振り軸の反復回動を伝動機構を介して可動メスに伝えるから、押え金に設けた可動メスが確実に往復動作して縫製生地の端縁を切り揃え、合わせ縫いを良好に実施することが可能となる。 In the box bed double chain stitch sewing machine according to the third aspect of the invention, since the repetitive rotation of the female swing shaft inside the sewing machine arm is transmitted to the movable knife through the transmission mechanism, the movable knife provided on the presser foot is surely Thus, the edge of the sewing fabric is trimmed and the stitching can be performed satisfactorily.

更に第発明に係る箱形ベッド二重環縫いミシンにおいては、メス振り軸の反復回動を可動メスに伝える伝動機構が押え棒の支持部材を兼ねる伝動筒を備えるから、ミシンアーム内部のメス振り軸からミシンアーム外部の可動メスへの伝動を、簡素な構成で確実に実現することができる等、本発明は優れた効果を奏する。 Further, in the box bed double chain stitch sewing machine according to the fourth aspect of the invention, the transmission mechanism for transmitting the repetitive rotation of the knife swinging shaft to the movable knife is provided with a transmission cylinder that also serves as a support member for the presser bar. The present invention has an excellent effect such that transmission from the swing shaft to the movable knife outside the sewing machine arm can be realized with a simple configuration.

本発明に係る箱形ベッド二重環縫いミシンの全体構成を示す外観斜視図である。It is an external appearance perspective view which shows the whole structure of the box-shaped bed double chain stitch sewing machine which concerns on this invention. 針板の取付け状態の説明図である。It is explanatory drawing of the attachment state of a needle plate. 針板の取付け位置近傍でのミシンベッドの正面断面図である。It is front sectional drawing of the sewing machine bed in the attachment position vicinity of a needle plate. 可動メスへの駆動機構の斜視図である。It is a perspective view of the drive mechanism to a movable knife. 本発明に係る箱形ベッド二重環縫いミシンの他の実施の形態を示す外観斜視図である。It is an external appearance perspective view which shows other embodiment of the box-shaped bed double chain stitch sewing machine which concerns on this invention.

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、本発明に係る箱形ベッド二重環縫いミシンの全体構成を示す外観斜視図である。以下の説明においては、図1中の上下及び左右をそのまま用い、また、図1の紙面手前側を前とし、同じく奥側を後とする。   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 box-shaped bed double chain stitch sewing machine according to the present invention. In the following description, the upper and lower sides and the left and right sides in FIG. 1 are used as they are, and the front side of the paper in FIG.

図1に示すように箱形ベッド二重環縫いミシンは、箱形のミシンベッド1、脚柱2及びミシンアーム3を備えている。脚柱2は、ミシンベッド1の右側端部の上面に、該上面に対して略垂直に立ち上がるように設けてある。ミシンアーム3は、脚柱2の上端部に連設され、ミシンベッド1と平行をなして左方に延びている。ミシンアーム3の先端部には、針棒30及び押え棒31が支持されている。   As shown in FIG. 1, the box-shaped bed double chain stitch sewing machine includes a box-shaped sewing bed 1, a pedestal 2, and a sewing machine arm 3. The pedestal 2 is provided on the upper surface of the right end of the sewing machine bed 1 so as to rise substantially perpendicular to the upper surface. The sewing machine arm 3 is connected to the upper end of the pedestal 2 and extends to the left in parallel with the sewing machine bed 1. A needle bar 30 and a presser bar 31 are supported at the tip of the sewing machine arm 3.

針棒30は、ミシンアーム3の内部に設けた針棒駆動機構(図示省略)の動作により上下動する。針棒30は、ミシンアーム3の下方に突出しており、該針棒30の下端部には、針止め40を介して複数本の針4,4…が取付けてある。これらの針4,4…は、針棒30の上下動に応じて上昇及び下降する。   The needle bar 30 moves up and down by the operation of a needle bar drive mechanism (not shown) provided inside the sewing machine arm 3. The needle bar 30 protrudes below the sewing machine arm 3, and a plurality of needles 4, 4... Are attached to the lower end portion of the needle bar 30 via a needle stopper 40. These needles 4, 4... Rise and fall according to the vertical movement of the needle bar 30.

押え棒31は、針棒30の後側においてミシンアーム3の下方に突出している。該押え棒31の突出端部には、後述するように構成された押え金5が取付けてある。押え棒31は、上下方向の移動を可能として、ミシンアーム3の内部に支持してある。押え棒31は、作業者の適宜の操作によって上下方向に移動し、押え金5は、押え棒31の上下動に応じて上昇及び下降する。   The presser bar 31 protrudes below the sewing machine arm 3 on the rear side of the needle bar 30. A presser foot 5 configured as described later is attached to the protruding end portion of the presser bar 31. The presser bar 31 is supported inside the sewing machine arm 3 so as to be movable in the vertical direction. The presser bar 31 is moved in the vertical direction by an appropriate operation of the operator, and the presser foot 5 is raised and lowered in accordance with the vertical movement of the presser bar 31.

ミシンベッド1の上面には、針4,4…及び押え金5の下降位置に対応するように針板10が取付けてある。図2は、針板10の取付け状態の説明図である。針板10は、図示のように、前後に長い矩形の平板であり、ミシンベッド1の所定位置に固定した取付け台11に、複数本(2本のみ図示)の止めねじ 10a,10a…によって着脱自在に取り付けてある。針板10の前縁には、幅方向(左右方向)の中央に矩形の切欠き部12が形成してある。   A needle plate 10 is attached to the upper surface of the sewing machine bed 1 so as to correspond to the lowered positions of the needles 4, 4. FIG. 2 is an explanatory diagram of a state in which the needle plate 10 is attached. As shown in the figure, the needle plate 10 is a rectangular flat plate that is long in the front-rear direction. It is attached freely. A rectangular notch 12 is formed at the front edge of the needle plate 10 in the center in the width direction (left-right direction).

針板取付け台11には、針板10の取付け時に前記切欠き部12に整合する位置に、該切欠き部12よりも広幅の凹所 12aが設けてあり、該凹所 12aには、ガイド取付け片14が係合されている。ガイド取付け片14は、凹所 12aの底面のねじ孔に螺合する押しねじ15により上向きに押して針板10の裏面に押し付け、切欠き部12の下に位置して固定されている。ガイド取付け片14は、前後に並ぶ2つのねじ孔を有しており、ガイド取付け片14には、前記ねじ孔の夫々に螺合する止めねじ17,17により、生地ガイド16が締め付け固定されている。生地ガイド16は、止めねじ17,17による固定位置から後方に延び、針板10の上面の幅方向中央に、該上面に対して垂直に立ち上がるように配置される平板状の部材である。   The needle plate mounting base 11 is provided with a recess 12a wider than the notch 12 at a position aligned with the notch 12 when the needle plate 10 is attached. A mounting piece 14 is engaged. The guide mounting piece 14 is pressed upward by a pressing screw 15 screwed into the screw hole on the bottom surface of the recess 12a and pressed against the back surface of the needle plate 10, and is fixed below the notch 12. The guide mounting piece 14 has two screw holes arranged in the front and rear directions. The dough guide 16 is fastened and fixed to the guide mounting piece 14 by set screws 17 and 17 screwed into the screw holes, respectively. Yes. The dough guide 16 is a flat plate-like member that extends rearward from a fixed position by the set screws 17 and 17 and is arranged so as to rise vertically to the upper surface at the center of the upper surface of the needle plate 10 in the width direction.

また針板10には、送り歯穴13,13…が形成してある。送り歯穴13,13…は、前後に長い細幅矩形の開口であり、左右両側に振り分けて各2つ配してある。送り歯穴13,13…は、ミシンベッド1の内部で動作する送り歯を突出させるために設けてある。送り歯は、ミシンベッド1の内部の送り機構の動作により、前後運動及び上下運動を組み合わせた長円形の運動を行う公知の送り要素である。送り歯は、上動時に夫々の送り歯穴13,13…を経て針板10の上に突出して後方に移動し、その後に下動して前方に復帰移動する動作を繰り返す。この動作により針板10上の縫製生地(図示省略)には、後方に向けて間欠的な送りが加えられる。   Further, the needle plate 10 is formed with feed dog holes 13, 13. The feed dog holes 13, 13... Are narrow rectangular openings that are long in the front-rear direction, and are distributed in two on the left and right sides. The feed dog holes 13, 13... Are provided for projecting feed dogs operating inside the sewing machine bed 1. The feed dog is a known feed element that performs an oval motion that combines a back-and-forth motion and a vertical motion by the operation of a feed mechanism inside the sewing machine bed 1. When the feed dog moves upward, the feed dog protrudes through the feed dog holes 13, 13... And moves rearward and then moves backward, and then moves downward and returns to the front. By this operation, intermittent feed is applied to the sewing fabric (not shown) on the needle plate 10 backward.

図2には、押え金5及び針4,4…が併せて図示してある。押え金5は、押え棒31の下動により下降した場合に、図示のように針板10上に重なり、該針板10との間に縫製生地を挾持する。押え金5は、押え棒31の下端に固定した押え本体50と、2つの押え足51,52とを有する。押え足51,52は、押え本体50の左右両側に連設され、前方に向けて互いに平行をなして延びている。押え足51,52は、押え本体50の前側で適宜の隙間を隔てて対向し、縫製生地の導入路を径形成する。   2, the presser foot 5 and the needles 4, 4,. When the presser foot 5 is lowered due to the downward movement of the presser bar 31, the presser foot 5 is overlapped on the needle plate 10 as shown in the figure, and holds the sewing fabric between the presser plate 10. The presser foot 5 has a presser body 50 fixed to the lower end of the presser bar 31 and two presser feet 51 and 52. The presser feet 51 and 52 are connected to the left and right sides of the presser body 50 and extend parallel to each other toward the front. The presser feet 51 and 52 are opposed to each other with an appropriate gap on the front side of the presser body 50, and form a diameter of an introduction path for the sewing fabric.

これらの押え足51,52には、固定メス6a及び可動メス6bを備えるメス機構が装備されている。固定メス6aは、左側の押え足51に固定された板状のメスである。固定メス6aは、押え足51に設けた矩形の保持穴53に挿入固定されている。図2中には、押え足51の外側に突出する固定メス6aの基部が示されている。固定メス6aは、押え足51,52間の前記導入路の内部に突出する先端に刃を有している。   These presser feet 51 and 52 are equipped with a knife mechanism including a fixed knife 6a and a movable knife 6b. The fixed knife 6a is a plate-shaped knife fixed to the left presser foot 51. The fixed knife 6a is inserted and fixed in a rectangular holding hole 53 provided in the presser foot 51. In FIG. 2, the base portion of the fixed knife 6 a that protrudes outside the presser foot 51 is shown. The fixed knife 6a has a blade at the tip that protrudes into the introduction path between the presser feet 51 and 52.

可動メス6bは右側の押え足52に設けた保持穴54に挿入保持されている。可動メス6bは、保持穴54による案内下で左右方向に移動可能である。可動メス6bは、押え足51,52間の前記導入路の内部に突出する先端部に刃を有している。可動メス6bの基部は、押え足52の外側に適長突出し、取付け台74の下端のメスホルダ75に固定してある。取付け台74及びメスホルダ75は、後述する伝動機構7の一部を構成する。可動メス6bは、伝動機構7を介して伝えられるメス振り軸9(図参照)の反復回動に応じて左右方向に往復動作する。往復動作する可動メス6bは、前記導入路内で固定メス6aの刃に摺接する。 Movable knife 6b is inserted and held in the holding hole 54 provided on the right side of the presser foot 52. The movable knife 6b is movable in the left-right direction under the guidance of the holding hole 54. The movable knife 6b has a blade at the tip that projects into the introduction path between the presser feet 51 and 52. The base of the movable knife 6b protrudes to the outside of the presser foot 52 and is fixed to the knife holder 75 at the lower end of the mounting base 74. The mount 74 and the female holder 75 constitute a part of the transmission mechanism 7 to be described later. The movable knife 6b reciprocates in the left-right direction in response to repeated rotation of the knife swing shaft 9 (see FIG. 4 ) transmitted through the transmission mechanism 7. The reciprocating movable knife 6b is in sliding contact with the blade of the fixed knife 6a in the introduction path.

針4,4…は、左,右の押え足51,52の後側に下降し、押え本体50に設けた針穴、及び針板10に設けた針穴 10a,10a…(図3参照)を通してミシンベッド1の内部に達する。押え足51,52間の導入路には、2枚の縫製生地が、端縁を合わせ、針板10の上で垂直に立ち上がる姿勢で導入される。固定メス6a及び可動メス6bは、摺接位置に達した縫製生地の端縁を切り揃える。切り揃えられた生地は、押え本体50の作用により上下に重なり、針4,4…の下降位置に送り込まれて合わせ縫いされる。   The needles 4, 4,... Descend to the rear side of the left and right presser feet 51, 52, and the needle holes provided in the presser body 50 and the needle holes 10a, 10a provided in the needle plate 10 (see FIG. 3). The inside of the sewing machine bed 1 is reached through. In the introduction path between the presser feet 51 and 52, two sewing fabrics are introduced in a posture in which the edges are aligned and rise vertically on the needle plate 10. The fixed knife 6a and the movable knife 6b cut and align the edges of the sewing fabric that has reached the sliding contact position. The cut and aligned fabrics are vertically overlapped by the action of the presser main body 50, sent to the lowered position of the needles 4, 4,.

前述した生地ガイド16は、押え足51,52間の導入路の内部に達し、該導入路内での縫製生地の立ち上がり姿勢を維持する作用をなす。生地ガイド16の位置は、押しねじ15を緩めることで、ガイド取付け片14と共に調節することができる。作業者は、生地ガイド16の位置を調節することにより、縫製生地の導入姿勢を調整し、固定メス6a及び可動メス6bによる切り揃えをに良好に行わせることができる。また生地ガイド16は、押しねじ15を緩めることで、ガイド取付け片14と共にミシンベッド1の前方に取り外すことができる。生地ガイド16は、他の合わせ縫いを実施する場合に取り外す。他の合わせ縫いとは、例えば、2枚の生地のいずれか一方の生地の端縁のみを固定メス6a及び可動メス6bによって切断し、他方の生地の上に重ねて縫い合わせる合わせ縫い(合わせ1枚切りという)等である。   The cloth guide 16 described above reaches the inside of the introduction path between the presser feet 51 and 52, and functions to maintain the rising posture of the sewing cloth in the introduction path. The position of the dough guide 16 can be adjusted together with the guide mounting piece 14 by loosening the push screw 15. By adjusting the position of the fabric guide 16, the operator can adjust the introduction posture of the sewing fabric, and can perform the trimming with the fixed knife 6a and the movable knife 6b satisfactorily. The dough guide 16 can be removed together with the guide mounting piece 14 to the front of the sewing machine bed 1 by loosening the push screw 15. The fabric guide 16 is removed when performing other stitching. The other stitching is, for example, the stitching of one of two fabrics only by cutting the edge of one fabric with the fixed knife 6a and the movable knife 6b and stitching on the other fabric (one piece of stitching) Etc.).

右側の押え足52の上面には、ガイド板55が取り付けてある。ガイド板55は、右側の押え足52の前部に垂直に立ち上がり、左側の押え足53に後部に向けて斜めに延びるように取付けた湾曲平板である。ガイド板55は、固定メス6a及び可動メス6bの切り揃えにより除去された縫製生地の切断片を案内し、左側の押え足53の外側に排出する作用をなす。   A guide plate 55 is attached to the upper surface of the right presser foot 52. The guide plate 55 is a curved plate that is vertically attached to the front part of the right presser foot 52 and attached to the left presser foot 53 so as to extend obliquely toward the rear part. The guide plate 55 guides the cut piece of the sewing fabric removed by aligning the fixed knife 6a and the movable knife 6b and discharges it to the outside of the left presser foot 53.

図1に示すように、ミシンアーム3の左端面の下部には、取付ブラケット57を介して吸込管56が取り付けてある。吸込管56は、押え金5の左側後部に向けて開口する吸込口を備えており、ガイド板55の作用により排出される切断片を吸込口に吸引して除去する。吸込管56の取付ブラケット57は、後部に設けた上下方向のヒンジピン58を中心として開くことが可能である。吸込管56は、取付ブラケット57を開き操作することにより、押え金5から離れた待機位置に移動する。待機位置に移動した吸込管56は、ミシンベッド1上への縫製生地の着脱を阻害しない。   As shown in FIG. 1, a suction pipe 56 is attached to the lower part of the left end surface of the sewing machine arm 3 via a mounting bracket 57. The suction pipe 56 is provided with a suction opening that opens toward the left rear portion of the presser foot 5, and a cut piece discharged by the action of the guide plate 55 is sucked into the suction opening and removed. The mounting bracket 57 of the suction pipe 56 can be opened around a vertical hinge pin 58 provided at the rear. The suction pipe 56 moves to a standby position away from the presser foot 5 by opening the mounting bracket 57. The suction pipe 56 that has moved to the standby position does not hinder attachment / detachment of the sewing fabric onto the sewing machine bed 1.

図1に示すようにミシンベッド1は、針板10の左右両側に平坦な上面20を有している。本発明においてミシンベッド1の上面20は、針板10の上面よりも低くしてある。針板10の取付け位置の右側には、針板10から離れるに従って斜めに切り下がる段差部21が設けてある。また針板10は、図2に示すように、幅方向の両側縁にテーパ状の面取り部18,18を備えている。右側縁の面取り部18は、ミシンベッド1に取付けたとき前記段差部21に連続する。ミシンベッド1の上面20は、面取り部18及び段差部21、又は面取り部18によって針板10の上面に連続させてある。   As shown in FIG. 1, the sewing machine bed 1 has flat upper surfaces 20 on the left and right sides of the needle plate 10. In the present invention, the upper surface 20 of the sewing machine bed 1 is set lower than the upper surface of the needle plate 10. On the right side of the attachment position of the needle plate 10, there is provided a step portion 21 that is obliquely cut off as it is away from the needle plate 10. Further, as shown in FIG. 2, the needle plate 10 includes tapered chamfered portions 18 and 18 on both side edges in the width direction. The chamfered portion 18 on the right edge is continuous with the stepped portion 21 when attached to the sewing machine bed 1. The upper surface 20 of the sewing machine bed 1 is continuous with the upper surface of the needle plate 10 by the chamfered portion 18 and the stepped portion 21 or the chamfered portion 18.

図3は、針板10の取付け位置近傍でのミシンベッド1の正面断面図である。ミシンベッド1の内部には、針板10の下側にルーパ8が設けてある。ルーパ8は、ルーパ軸80に基部を固定したルーパ台81の先端部に取付けてある。ルーパ軸80は、針板10の下方に離れた位置に、軸長方向を前後方向として架設し、ミシン主軸からの伝動により所定の角度範囲内で反復回動するように構成してある。ルーパ台81及びルーパ8は、ルーパ軸80反復回動に応じ、該ルーパ軸80を中心として、図中に実線にて示す位置と破線にて示す位置との間で揺動する。   FIG. 3 is a front sectional view of the sewing machine bed 1 in the vicinity of the attachment position of the needle plate 10. A looper 8 is provided inside the sewing machine bed 1 below the needle plate 10. The looper 8 is attached to the tip of a looper base 81 whose base is fixed to the looper shaft 80. The looper shaft 80 is constructed at a position away from the needle plate 10 with the axial direction as the front-rear direction, and is repeatedly rotated within a predetermined angular range by transmission from the sewing machine main shaft. The looper base 81 and the looper 8 swing around the looper shaft 80 between a position indicated by a solid line and a position indicated by a broken line in the drawing in response to repeated rotation of the looper shaft 80.

ルーパ8は、針4,4…の上昇及び下降と同期して針板10の下面に沿って揺動し、該針板10に設けた針穴 10a,10a…を通して下降する針4,4…が保持する針糸を捉え、ルーパ糸と絡めることで縫目を形成する公知の動作をなす。ルーパ8の揺動は、針4,4…が下降する針板10の中央部を頂点とし、左右両側で針板10から離れるように揺動する。ミシンベッド1の段差部21は、ルーパ8の揺動域との干渉を避けて設けてあり、ミシンベッド1の上面20を、これよりも高い位置にある針板10の上面に連続させている。   The looper 8 swings along the lower surface of the needle plate 10 in synchronism with the raising and lowering of the needles 4, 4,..., And the needles 4, 4,. A known operation of forming a seam is performed by capturing the needle thread held by the thread and entwining it with the looper thread. The looper 8 swings away from the needle plate 10 on both the left and right sides with the central portion of the needle plate 10 where the needles 4, 4. The step portion 21 of the sewing machine bed 1 is provided to avoid interference with the swinging region of the looper 8, and the upper surface 20 of the sewing machine bed 1 is made continuous with the upper surface of the needle plate 10 at a higher position. .

図3においては、針板10の右側に段差部21が設けてあり、同側のミシンベッド1の上面20は、針板10の上面よりも十分に低く、針板10の上面との間に図中にHとして示す段差が確保されている。前述したように針板10の上面には、押え金5が下降し、縫製生地を挾持する。押え金5は、メス機構を備えており、右側の押え足52の外側には、該押え足52が保持する可動メス6bの端部、及び該端部に連結したメスホルダ75が位置している。   In FIG. 3, a step portion 21 is provided on the right side of the needle plate 10, and the upper surface 20 of the sewing machine bed 1 on the same side is sufficiently lower than the upper surface of the needle plate 10 and is between the upper surface of the needle plate 10. A step shown as H in the figure is secured. As described above, the presser foot 5 descends on the upper surface of the needle plate 10 to hold the sewing fabric. The presser foot 5 is provided with a knife mechanism, and an end portion of a movable knife 6b held by the presser foot 52 and a knife holder 75 connected to the end portion are positioned outside the right presser foot 52. .

本発明においては、針板10の上面とミシンベッド1の上面20との間に段差Hが確保されていることから、メスホルダ75とミシンベッド1の上面20から前記段差H以上の隙間が生じる。従って作業者は、この隙間を利用して押え金5の近くで縫製生地を手で押え、ミシンベッド1の上面20に沿って滑らせながら後方に押すことで、縫製生地の送りを補助することができる。   In the present invention, since the step H is secured between the upper surface of the needle plate 10 and the upper surface 20 of the sewing bed 1, a gap more than the step H is generated from the knife holder 75 and the upper surface 20 of the sewing bed 1. Therefore, the operator uses this gap to press the sewing fabric by hand near the presser foot 5 and to push it backward while sliding along the upper surface 20 of the sewing machine bed 1 to assist the feeding of the sewing fabric. Can do.

ミシンベッド1の上面20は、図1、3に示すように、針板10の右側のミシンベッド1の上部を前側から覆うように取付けた前カバー22により形成してある。段差部21は、図3に示すように、前カバー22の縁部を曲げることにより形成してある。   As shown in FIGS. 1 and 3, the upper surface 20 of the sewing machine bed 1 is formed by a front cover 22 attached so as to cover the upper part of the sewing machine bed 1 on the right side of the needle plate 10 from the front side. As shown in FIG. 3, the stepped portion 21 is formed by bending the edge of the front cover 22.

前記段差部21は、針板10の左側にも同様に設けることができる。これにより作業者は、押え金5の左側においても、押え足51の外側に突出する固定メス6aの存在に煩わされずに針板10の近くで縫製生地を押え、該縫製生地の送りを補助することができる。前述した合わせ縫いは、このような送りの補助により良好に実施することが可能となる。   The step portion 21 can be similarly provided on the left side of the needle plate 10. As a result, even on the left side of the presser foot 5, the operator presses the sewing fabric near the needle plate 10 without being troubled by the presence of the fixed knife 6a protruding outside the presser foot 51, and assists the feeding of the sewing fabric. be able to. The above-described stitching can be performed satisfactorily with the aid of such feeding.

以上の効果は、ミシンベッド1の上面20を針板10の上面よりも低くするだけの簡易な構成で達成することができる。ミシンベッド1の上面20は、低くしただけであり、針板10の両側に拡がり、針板10上で縫製される大判の縫製生地を下から支える作用は維持される。従って本発明の箱形ベッド二重環縫いミシンにおいては、大判の縫製生地の端縁同士を一定幅で重ねて合わせ縫いすることが可能となる。   The above effects can be achieved with a simple configuration in which the upper surface 20 of the sewing machine bed 1 is lower than the upper surface of the needle plate 10. The upper surface 20 of the sewing machine bed 1 is only lowered, spreads on both sides of the needle plate 10, and maintains the function of supporting a large sewing fabric sewn on the needle plate 10 from below. Therefore, in the box-type bed double chain stitch sewing machine of the present invention, it is possible to sew the edges of the large-sized sewing fabric by overlapping them with a certain width.

図4は、可動メス6bへの伝動機構7の斜視図である。図中9は、メス振り軸である。メス振り軸9は、ミシンアーム3の内部に横架支持され、ミシン主軸からの伝動により、所定の角度範囲内で反復回動する回動軸である。メス振り軸9の一端部には、径方向外向きに突出する揺動アーム90が固定してある。揺動アーム90は、メス振り軸9の反復回動に応じて揺動する。   FIG. 4 is a perspective view of the transmission mechanism 7 to the movable knife 6b. In the figure, 9 is a knife swinging shaft. The knife swinging shaft 9 is a rotating shaft that is horizontally supported inside the sewing machine arm 3 and repeatedly rotates within a predetermined angle range by transmission from the sewing machine main shaft. A swing arm 90 that protrudes radially outward is fixed to one end of the knife swing shaft 9. The swing arm 90 swings in response to repeated rotation of the knife swing shaft 9.

伝動機構7は、円筒形をなす伝動筒70を備えている。伝動筒70は、軸長方向の一端部を大径としてあり、この大径部に径方向外向きに突設されたメス取付けアーム71を一体に備えている。伝動筒70の他端部には、径方向外向きに突出するように伝動アーム72が取付けてある。伝動筒70は、図4に示すように、メス取付けアーム71の側を下として、ミシンアーム2の下壁を貫通する支持筒73に中心軸回りでの回動を自在として支持してある。   The transmission mechanism 7 includes a transmission cylinder 70 having a cylindrical shape. The transmission cylinder 70 has one end portion in the axial length direction having a large diameter, and is integrally provided with a female attachment arm 71 projecting radially outward from the large diameter portion. A transmission arm 72 is attached to the other end of the transmission cylinder 70 so as to protrude outward in the radial direction. As shown in FIG. 4, the transmission cylinder 70 is supported by a support cylinder 73 penetrating the lower wall of the sewing machine arm 2 with the female attachment arm 71 facing down so as to freely rotate around the central axis.

伝動筒70の上部は、ミシンアーム3の内部に突出している。伝動アーム72は、伝動筒70の突出端部に取付けてあり、メス振り軸9の揺動アーム90に、両端に玉継手92,92を備える伝動リンク91を介して連結してある。伝動リンク91は、メス振り軸9の反復回動による揺動アーム90の揺動を伝動アーム72に伝える。伝動アーム72は、揺動アーム90の揺動に応じて揺動し、揺動アーム72が固定された伝動筒70は、メス振り軸9の反復回動に対応する角度範囲内で反復回動する。   The upper part of the transmission cylinder 70 protrudes inside the sewing machine arm 3. The transmission arm 72 is attached to the protruding end portion of the transmission cylinder 70 and is connected to the swing arm 90 of the female swing shaft 9 via a transmission link 91 having ball joints 92, 92 at both ends. The transmission link 91 transmits the swing of the swing arm 90 due to repeated rotation of the knife swing shaft 9 to the transmission arm 72. The transmission arm 72 swings according to the swing of the swing arm 90, and the transmission cylinder 70 to which the swing arm 72 is fixed rotates repeatedly within an angle range corresponding to the repeated swing of the female swing shaft 9. To do.

以上のように伝動筒70は、揺動アーム90、伝動リンク91及び伝動アーム72を介して伝えられるメス振り軸9の反復回動に応じて軸回りに反復回動する。伝動リンク91の両端の玉継手92,92は、異なる軸回りに揺動する揺動する揺動アーム90と伝動アーム72との相対的な位置変化を吸収するために設けてある。   As described above, the transmission cylinder 70 repeatedly rotates around the axis in accordance with the repeated rotation of the female swing shaft 9 transmitted through the swing arm 90, the transmission link 91, and the transmission arm 72. The ball joints 92 and 92 at both ends of the transmission link 91 are provided to absorb relative positional changes between the swinging arm 90 and the transmission arm 72 that swing around different axes.

伝動筒70の下端部に設けたメス取付けアーム71は、ミシンアーム3の外側に位置し、先端部に下向きに延びる固定座 71aを有している。この固定座 71aには、取付け台74が固定してあり、該取付け台74の下部に設けたメスホルダ75に、前述したように可動メス6bの基部が取付けてある。可動メス6bは、押え金5の右側の押え足52に往復動作可能に保持されている。可動メス6bは、伝動筒70の反復回動に応じてメス取付けアーム71が揺動することにより往復動作する。メスホルダ75は、取付け台74に設けたコイルばね76によって下向きに付勢してある。コイルばね76は、メスホルダ75に取付けた可動メス6bを下向きに押し、押え金5の前記導入路の内部において固定メス6aに押し付ける。往復動作する可動メス6bは、コイルばね76により押し付けられた状態で固定メス6aに摺接し、縫製生地の端縁を確実に切断する。   A knife mounting arm 71 provided at the lower end of the transmission cylinder 70 is positioned outside the sewing machine arm 3 and has a fixed seat 71a extending downward at the tip. A mounting base 74 is fixed to the fixed seat 71a, and the base of the movable knife 6b is attached to the female holder 75 provided at the lower part of the mounting base 74 as described above. The movable knife 6b is held by a presser foot 52 on the right side of the presser foot 5 so as to be able to reciprocate. The movable knife 6b reciprocates as the knife mounting arm 71 swings in response to repeated rotation of the transmission cylinder 70. The female holder 75 is biased downward by a coil spring 76 provided on the mounting base 74. The coil spring 76 presses the movable knife 6b attached to the knife holder 75 downward, and presses it against the fixed knife 6a inside the introduction path of the presser foot 5. The reciprocating movable knife 6b is in sliding contact with the fixed knife 6a while being pressed by the coil spring 76, and reliably cuts the edge of the sewing fabric.

なお図においては、可動メス6bの取付け状態を明示するために、該可動メス6bの取付け方向を実際と異なる方向としてある。可動メス6bは、メス振り軸9と平行に延び、該メス振り軸9が横架されたミシンアーム3の方向、即ち、左右方向に往復動作する。 In FIG. 4 , in order to clearly show the attachment state of the movable knife 6b, the attachment direction of the movable knife 6b is different from the actual direction. The movable knife 6b extends in parallel with the knife swinging shaft 9, and reciprocates in the direction of the sewing machine arm 3 on which the knife swinging shaft 9 is horizontally mounted, that is, in the left-right direction.

伝動筒70は、円筒形の支持ブッシュ32を内嵌保持しており、該支持ブッシュ32には、押え棒31が挿通されている。押え棒31の下端は、ミシンアーム3の外部に突出しており、この突出端に、前述したように押え金5が取付けてある。押え棒31は、支持ブッシュ32による支持下で上下方向に移動し、この移動により押え金5が上昇及び下降する。   The transmission cylinder 70 holds a cylindrical support bush 32 fitted therein, and a presser bar 31 is inserted into the support bush 32. The lower end of the presser bar 31 protrudes outside the sewing machine arm 3, and the presser foot 5 is attached to the protruding end as described above. The presser bar 31 moves in the vertical direction under the support of the support bush 32, and the presser foot 5 is raised and lowered by this movement.

メス駆動装置7は、ミシンアーム3の下部を上下方向に貫通する伝動筒70を備え、該伝動筒70は、メス振り軸9からの伝動によって反復回動し、可動メス6bは、伝動筒70の反復回動に応じて往復動作する。伝動筒70は、押え棒31を上下動可能に支持する支持ブッシュ32を内嵌保持しており、押え棒31と同軸をなしてミシンアーム3を貫通する。このようにメス駆動装置7は、ミシンアーム3の内部のメス振り軸9から、ミシンアーム3の外部の押え金5に設けた可動メス6bの伝動を、押え棒31の支持部材を兼ねる伝動筒70を利用した簡素な構成により実現しており、可動メス6bを確実に往復動作させることができる。   The knife drive device 7 includes a transmission cylinder 70 that penetrates the lower part of the sewing machine arm 3 in the vertical direction. The transmission cylinder 70 is repeatedly rotated by transmission from the knife swinging shaft 9, and the movable knife 6 b is connected to the transmission cylinder 70. It reciprocates according to repeated rotation. The transmission cylinder 70 holds a support bush 32 that supports the presser bar 31 so as to be movable up and down, and penetrates the sewing machine arm 3 coaxially with the presser bar 31. In this way, the knife driving device 7 transmits the transmission of the movable knife 6b provided on the presser foot 5 outside the sewing machine arm 3 from the knife swing shaft 9 inside the sewing machine arm 3 to the transmission cylinder that also serves as a support member for the presser bar 31. This is realized by a simple configuration using 70, and the movable knife 6b can be reliably reciprocated.

図5は、本発明に係る箱形ベッド二重環縫いミシンの他の実施の形態を示す外観斜視図である。本図に示すミシンは、中筒タイプの箱形ベッド二重環縫いミシンであり、図1に示すミシンと同様、ミシンベッド1、脚柱2及びミシンアーム3を備えている。ミシンアーム3の先端部には、針棒30及び押え棒31が垂下支持されており、これらの下端には、針針4,4…及び押え金5が夫々取付けてある。ミシンベッド1の上面には、針4,4…及び押え金5の下降位置に対応するように針板10が架設してある。   FIG. 5 is an external perspective view showing another embodiment of the box bed double chain stitch sewing machine according to the present invention. The sewing machine shown in this figure is a middle cylinder type box-shaped bed double chain stitch sewing machine, and includes a sewing machine bed 1, a pedestal 2 and a sewing machine arm 3 in the same manner as the sewing machine shown in FIG. A needle bar 30 and a presser bar 31 are suspended from the tip of the sewing machine arm 3, and needles 4, 4,... And a presser bar 5 are attached to the lower ends of the needle bar 30 and the presser bar 31, respectively. A needle plate 10 is installed on the upper surface of the sewing machine bed 1 so as to correspond to the lowered positions of the needles 4, 4.

ミシンベッド1は、図示のように、針板10の左右両側で異なる形状を有しており、針板10の右側(基端側)は、針板10よりも後側に適長に亘って延びる平坦な上面20を有する箱状部分1aとし、針板10の左側(先端側)は、針板10の長さ範囲内で平坦な上面20を有する筒状部分1bとしてある。   As shown in the figure, the sewing machine bed 1 has different shapes on the left and right sides of the needle plate 10, and the right side (base end side) of the needle plate 10 extends beyond the needle plate 10 to an appropriate length. A box-like portion 1 a having a flat upper surface 20 extending is formed, and a left side (tip side) of the needle plate 10 is a cylindrical portion 1 b having a flat upper surface 20 within the length range of the needle plate 10.

箱状部分1a及び筒状部分1bの上面20は、いずれも針板10の上面よりも低くしてあり、右側の箱状部分1aの上面20は、針板10の右側縁に設けた面取り部18(図2参照)と、針板10から離れるに従って斜めに切り下がる段差部21とによって針板10の上面に連続し、左側の筒状部分1bの上面20は、針板10の左側縁に設けた面取り部18(図2参照)によって針板10の上面に連続している。   The upper surface 20 of the box-shaped portion 1a and the cylindrical portion 1b is both lower than the upper surface of the needle plate 10, and the upper surface 20 of the right-side box-shaped portion 1a is a chamfered portion provided at the right edge of the needle plate 10. 18 (see FIG. 2) and a stepped portion 21 that is obliquely cut away from the needle plate 10 and is continuous with the upper surface of the needle plate 10, and the upper surface 20 of the left tubular portion 1b is located on the left edge of the needle plate 10. The chamfered portion 18 (see FIG. 2) provided is continuous with the upper surface of the needle plate 10.

押え金5は、前記図2に示すように、押え棒31の下端に取り付けた押え本体50の前方に突設された左右の押え足51,52を備え、これらの押え足51,52に保持された固定メス6a及び可動メス6bを備えるメス機構が装備されている。このメス機構は、前記図4に示すように構成されたメス駆動装置7の駆動によって動作し、左右の押え足51,52間に導入される縫製生地の端縁を切り揃える。メス機構及びメス駆動装置7の構成並びに動作は、図1〜図4に示す実施の形態と同様であり、詳細な説明は省略する。   As shown in FIG. 2, the presser foot 5 includes left and right presser feet 51 and 52 projecting forward from a presser body 50 attached to the lower end of the presser bar 31, and is held by these presser feet 51 and 52. A knife mechanism having a fixed knife 6a and a movable knife 6b is provided. This knife mechanism operates by driving the knife driving device 7 configured as shown in FIG. 4, and trims the edges of the sewing fabric introduced between the left and right presser feet 51, 52. The configuration and operation of the knife mechanism and knife drive device 7 are the same as those in the embodiment shown in FIGS.

図5に示す実施の形態においても、針落ち位置に送り込まれる縫製生地の端縁は、押え金5に装備されたメス機構の動作により切り揃えられるから、略一定の縫い幅での合わせ縫いを実施することができる。また、ミシンベッド1の上面20は針板10の上面よりも低くしてあるから、作業者は、針板10及び押え金5の両側の近くで縫製生地を手で押え、該縫製生地の送りを補助することができ、大判の縫製生地の合わせ縫いを確実に実施することができる。   In the embodiment shown in FIG. 5 as well, the edge of the sewing fabric fed to the needle entry position is trimmed by the operation of the knife mechanism provided in the presser foot 5, so that the stitching with a substantially constant stitch width is performed. Can be implemented. Since the upper surface 20 of the sewing machine bed 1 is lower than the upper surface of the needle plate 10, the operator presses the sewing fabric near the both sides of the needle plate 10 and the presser foot 5 and feeds the sewing fabric. This makes it possible to reliably carry out the stitching of large-sized sewing fabrics.

図5の実施の形態においては、ミシンベッド1の先端側に筒状部分1bが設けてあり、該筒状部分1bに挿通可能な筒形の生地の縫製に対応することが可能である。   In the embodiment of FIG. 5, a cylindrical portion 1b is provided on the front end side of the sewing machine bed 1, and it is possible to cope with sewing of a cylindrical fabric that can be inserted into the cylindrical portion 1b.

1 ミシンベッド
3 ミシンアーム
4 針
5 押え金
6a 固定メス
6b 可動メス
7 伝道機構
8 ルーパ
9 メス振り軸
10 針板
20 上面
30 針棒
31 押え棒 32 支持ブッシュ
70 伝動筒
74 取付け台(取付け部)
1 Sewing bed 3 Sewing arm 4 Needle 5 Presser foot
6a Fixed knife
6b Movable knife 7 Transmission mechanism 8 Looper 9 Knife swing axis
10 Stitch plate
20 Top view
30 needle bar
31 Presser bar 32 Support bush
70 Transmission cylinder
74 Mounting base (Mounting part)

Claims (4)

針板の幅方向の両側に縫製生地を載置するための平坦な上面を有する箱形のベッドと、該ベッドの上方のミシンアームに垂下支持した針棒及び押え棒と、該針棒及び押え棒の下端に夫々取付けた針及び押え金と、前記針板の下側の前記ベッドの内部に設けた送り機構及びルーパとを備え、前記押え棒と共に降下する前記押え金が前記針板の上に押え、前記送り機構が前記針板の長手方向の送りを加える縫製生地を、前記針棒と共に上下動する前記針と、前記送りの方向と平行な支軸を中心として前記針板の下面に沿って揺動する前記ルーパとにより縫製する箱形ベッド二重環縫いミシンにおいて、
前記押え金は、前記針板の上面に沿って前記送りの方向と交叉する向きに往復移動する可動メスと該可動メスに摺接する固定メスとを有するメス機構を備え
前記ベッドの上面は、前記針板の一側又は両側において、該針板の上面よりも低くしてあることを特徴とする箱形ベッド二重環縫いミシン。
A box-shaped bed having a flat upper surface for placing a sewing fabric on both sides in the width direction of the needle plate, a needle bar and presser bar supported by a sewing machine arm above the bed, and the needle bar and presser A needle and a presser foot respectively attached to the lower end of the bar; a feed mechanism and a looper provided in the bed below the needle plate; and the presser foot lowered with the presser bar is located on the needle plate. The sewing fabric to which the feed mechanism applies the feed in the longitudinal direction of the needle plate is attached to the lower surface of the needle plate around the needle that moves up and down together with the needle bar and a support shaft parallel to the feed direction. In the box-shaped bed double chain stitch sewing machine which is sewn by the looper swinging along,
The presser foot comprises a knife mechanism having a movable knife that reciprocates in the direction crossing the feeding direction along the upper surface of the needle plate and a fixed knife that slides on the movable knife .
Upper surface of said bed, said at one or both sides of the needle plate, the box-shaped bed double chain stitch sewing machine according to claim lower Citea Rukoto than the upper surface of the needle plate.
前記ベッドの上面と前記針板の上面とは、前記針板の両側に前記ルーパの揺動域との干渉を避けて設けた段差部によって連続させてある請求項に記載の箱形ベッド二重環縫いミシン。 2. The box-shaped bed 2 according to claim 1 , wherein the upper surface of the bed and the upper surface of the needle plate are continuous by step portions provided on both sides of the needle plate so as to avoid interference with the swinging area of the looper. Double ring sewing machine. 前記ミシンアームの内部に設けたメス振り軸と、該メス振り軸の反復回動を前記可動メスに伝え、該可動メスを往復移動させる伝動機構とを備える請求項1又は請求項2に記載の箱形ベッド二重環縫いミシン。 And female swing shaft provided inside the sewing machine arm, convey repetitive rotation of the female swing shaft to the movable knife, according to claim 1 or claim 2 and a transmission mechanism for reciprocating the movable knife Box bed double chain stitch machine. 前記伝動機構は、
前記ミシンアームの下部を上下方向に貫通して支持してあり、前記押え棒の下部を支持する支持ブッシュを内嵌保持する伝動筒と、
前記ミシンアームの内部に位置する前記伝動筒の上部に前記メス振り軸の反復回動を伝える伝動リンクとを備え、
前記ミシンアームの外部に突出する前記伝動筒の下部に、前記可動メスの取り付け部を設けてある請求項に記載の箱形ベッド二重環縫いミシン。
The transmission mechanism is
A transmission cylinder that is supported by penetrating the lower part of the sewing machine arm in the vertical direction, and that internally supports and holds a support bush that supports the lower part of the presser bar;
A transmission link that transmits repetitive rotation of the female swing shaft to the upper part of the transmission cylinder located inside the sewing machine arm;
The box-shaped bed double chain stitch sewing machine according to claim 3 , wherein a mounting portion for the movable knife is provided at a lower portion of the transmission cylinder protruding to the outside of the sewing machine arm.
JP2009108327A 2009-03-06 2009-04-27 Box bed double chain stitch machine Active JP4822193B2 (en)

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KR1020100013809A KR101319610B1 (en) 2009-03-06 2010-02-16 Double chain stitch sewing machine having box-shaped bed
TW99106402A TWI410544B (en) 2009-03-06 2010-03-05 Box Machine Double Line Chain Stitch Sewing Machine
CN2010101185755A CN101824709B (en) 2009-03-06 2010-03-05 Double-chain stitch sewing machine having box-shaped bed

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JP3499358B2 (en) * 1996-01-19 2004-02-23 ペガサスミシン製造株式会社 Sewing machine with scalpel presser with cloth guide
JPH11300071A (en) * 1998-04-16 1999-11-02 Yamato Sewing Mach Co Ltd Beltlike article cutter for sewing machine
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