JPS5939987Y2 - Thread guide device for horizontal full-rotation hook in zigzag sewing machine - Google Patents

Description

【考案の詳細な説明】 本考案はジグザグミシンの糸案内装置に関するものであ
る。[Detailed Description of the Invention] The present invention relates to a thread guide device for a zigzag sewing machine.

水平全回転釜を有するジグザグミシンにおいて、第６図
に示すようにスーパ縫を含むブラインドステッチを縫威
する場合等では上糸の糸線り側が上糸の糸引上げ側に巻
き込むように絡み、糸引上げ側を天秤で引上げる場合に
糸同士の摩擦抵抗により糸線り側も一諸に上方へ引き上
げられ、布の上に位置する糸線り側の糸に大きなたるみ
が発生し、糸線め工程でこのたるみが完全に解消されず
糸線り不良の原因となる。In a zigzag sewing machine with a horizontal full-rotation hook, when sewing blind stitches including super stitches as shown in Fig. 6, the thread line side of the needle thread gets entangled with the thread pull-up side of the needle thread, causing the thread to become tangled. When the pulling side is pulled up with a thread take-up, the thread line side is also pulled upward all at once due to the frictional resistance between the threads, causing a large amount of slack in the threads on the thread line side located on the top of the fabric, causing the thread line line to become loose. This slack is not completely eliminated during the process, causing poor yarn alignment.

本考案はこれの防止を目的とするものである。The present invention aims to prevent this.

先ず第７図について従来の中釜正面向きのジグザグミシ
ンによる第６図のような左基線のブラインドステッチ縫
成時の右側縫目Ｃに続く左縫目すの形成状態を説明する
。First, with reference to FIG. 7, the formation state of the left seam following the right seam C when blind stitching the left base line as shown in FIG. 6 using a conventional zigzag sewing machine with an inner hook facing the front will be described.

第７図は針板を省略してあり、第７図のＩは布１を刺通
して下降した針２に挿通した上糸３が中釜の剣先４に捕
捉されたのち、針２が布１上へ抜けた状態を示している
。The throat plate is omitted in FIG. 7, and I in FIG. 7 shows that the upper thread 3 inserted into the needle 2, which has pierced the fabric 1 and descended, is caught by the tip 4 of the inner hook, and then the needle 2 is inserted into the fabric 1. It shows a state where it has fallen out.

針２が更に上昇し、中釜が第７図の川の様に矢印方向へ
更に回転するに伴い、上糸３で形成されたループａは拡
大しつつ第７図■のように下糸ポビン５を取付けたボビ
ンケース（図示省略）の外側を周回し、次いで中釜が反
転すると共に天秤の作用で上糸が引上げられ、布は矢印
方向へ送られ始める。As the needle 2 further rises and the inner hook further rotates in the direction of the arrow as shown in the river in Fig. 7, the loop a formed by the upper thread 3 expands and connects to the bobbin thread pobin as shown in Fig. 7 (■). 5 is attached to the bobbin case (not shown), and then the inner hook is turned over and the upper thread is pulled up by the action of the thread take-up, and the cloth begins to be fed in the direction of the arrow.

天秤が尚も上昇すると第７図■のようにループａが縮小
すると共にボビン５から引出された下糸６を引上げる。When the thread take-up still rises, the loop a contracts as shown in FIG.

更に第７図Ｖのように上糸３が引上げられ、布１も進み
縫目すが形成される。Furthermore, as shown in FIG. 7V, the upper thread 3 is pulled up, and the cloth 1 is also advanced to form a seam.

この縫或の際、中釜の剣先より離脱してフリーになった
ループａは第８図に示すように縫目すのほぼ下方に位置
し、ボビンケースのまわり止めダに沿って、上方へ引き
上げられるため、糸引き上げ側ｅと糸線り側ｄとの接触
面は少なく、糸引き上げ時において糸線り側ｄがむやみ
に糸引き上げ側ｅに伴って上昇することなく、仮りに上
昇してもその量は少なく、糸線め工程において、その弛
んだ糸も確実に引上げ良好な糸線りを保つことが可能で
ある。During this sewing, loop a, which is released from the tip of the inner hook and becomes free, is located almost below the seam, as shown in Figure 8, and moves upward along the rotation stopper of the bobbin case. Because the thread is pulled up, the contact surface between the thread pulling side e and the thread pulling side d is small, and when the thread is being pulled up, the thread pulling side d does not rise unnecessarily along with the thread pulling side e, but instead rises temporarily. The amount of the loose yarn is small, and in the filament process, it is possible to reliably pull up the loose yarn and maintain a good filament.

第９図は水平全回転釜７を用いて、第６図の縫模様と同
様の模様を縫或する場合を示す。FIG. 9 shows a case where a horizontal full-rotation hook 7 is used to sew a pattern similar to the sewing pattern shown in FIG. 6.

この場合、剣先８でループａを捕捉した釜７は反時計方
向に回転し下糸ボビン５を取付けたボビンケース（図示
省略）を周回し、第９図■に示すようにボビン５の右側
で剣先よりはずれ、ループａが天秤により引き上げられ
る。In this case, the hook 7, which has captured the loop a with the tip 8, rotates counterclockwise and goes around the bobbin case (not shown) to which the bobbin thread bobbin 5 is attached, until it reaches the right side of the bobbin 5 as shown in FIG. The loop a is removed from the tip of the sword and pulled up by the balance.

そして第９図■、■と進み縫目が形成される。Then, as shown in FIG. 9, the stitches are formed.

上記縫目形成の糸引き上げ工程において、第９図■に示
すようにボビン５の右側にループａが位置するので、ル
ープａの糸線り側ｄは糸引き上げ側ｅを中心に巻き込む
ように絡んだ状態となって糸同士の摩擦力が大きくなり
、天秤でループａを引き上げた糸線り側ｄの糸も一諸に
上昇し、第９図■の鎖線のように糸線り側ｄに大きな糸
弛みが生じてその後の工程においてこの弛みを十分に解
消できずに糸線り不良の原因となる。In the thread pulling process for forming the seam, the loop a is located on the right side of the bobbin 5 as shown in FIG. As a result, the frictional force between the threads increases, and the threads on the yarn side d, which have pulled up the loop a with the thread take-up, also rise all at once, and move to the yarn side d as shown by the chain line in Figure 9. A large amount of yarn slack occurs, and this slack cannot be sufficiently eliminated in subsequent steps, resulting in poor yarn alignment.

従って、このような現象によって発生する糸線り不良は
単に上糸張力調節器のテンション皿の糸挟持張力を強く
するだけでは十分な解決にはならない。Therefore, the yarn alignment failure caused by such a phenomenon cannot be solved satisfactorily by simply increasing the yarn clamping tension of the tension plate of the needle thread tension regulator.

即ち、天秤による糸引き工程において、糸引き上げ側ｅ
を引き上げた時にループａの糸線り側ｄが一緒に上昇す
るのを規制する必要がある。That is, in the thread pulling process using a thread take-up, the thread pulling side e
It is necessary to prevent the yarn side d of the loop a from rising together when the loop a is pulled up.

その手段としては糸引き上げ時に糸引き上げ側と一緒に
ループａの糸線り側ｄが妄りに上昇しないよう・糸線り
側ｄに何らかの作用によって糸にブレーキかげ、糸線り
側ｄを規制する必要がある。The means for this is to prevent the yarn side d of loop a from accidentally rising together with the yarn pulling side when pulling up the yarn, and to apply a brake to the yarn by some action on the yarn side d to regulate the yarn side d. There is a need.

本考案は上記の観点にたち実現するものであり、以下実
施例に基づいて説明すれば次の通りである。The present invention has been realized based on the above-mentioned viewpoints, and will be described below based on examples.

第１図、第２図において、１１はミシンベッド、１２は
その下部に固定した取付枠で、この枠１２に固定した支
軸１３に筒状回転軸１４を回動自在に装着し、その上端
に剣先８を有する水平全回転釜７を固定する。In FIGS. 1 and 2, 11 is a sewing machine bed, 12 is a mounting frame fixed to the lower part of the bed, and a cylindrical rotating shaft 14 is rotatably mounted on a support shaft 13 fixed to this frame 12, and its upper end A horizontal full-rotation hook 7 having a tip 8 is fixed to.

１６はミシンベッド１の下部に固定した下軸で、この下
軸１６と該回転軸１４とがスパイラルギヤにより連動回
転する。A lower shaft 16 is fixed to the lower part of the sewing machine bed 1, and the lower shaft 16 and the rotating shaft 14 are rotated in conjunction with each other by a spiral gear.

１５は該回転軸１４と平行の軸を中心として下軸に連動
して揺動する回止め部材で、この部材１５の両端に夫々
掛止片１７．１８が設げられている。Reference numeral 15 denotes a locking member that swings about an axis parallel to the rotating shaft 14 in conjunction with the lower shaft, and locking pieces 17 and 18 are provided at both ends of this member 15, respectively.

１９は前記釜７の装着口に回動自在に装着したボビンケ
ースで、このケース１９の上側に前記回止め部材１５の
掛止片１７．１８を交互に掛止する一対の受部２０，２
１を設げである。Reference numeral 19 denotes a bobbin case that is rotatably mounted on the mounting opening of the hook 7, and on the upper side of this case 19 there are a pair of receiving parts 20, 2 on which the latching pieces 17 and 18 of the rotation preventing member 15 are alternately latched.
1 is provided.

２２は該ヘッド１１に設げた開口部２３にネジ２４によ
り着脱自在に固定した針板で、この針板２２の下面に糸
案内２５を固定しである。A throat plate 22 is detachably fixed to an opening 23 provided in the head 11 with screws 24, and a thread guide 25 is fixed to the lower surface of the throat plate 22.

この糸案内２５は図示例では丸棒をコ字形に屈曲したも
のであるが舌片状のものでもよい。In the illustrated example, the thread guide 25 is a round bar bent into a U-shape, but it may also be in the shape of a tongue.

又、この糸案内は針孔２６とボビンケースの間に位置し
、且つ布の送り方向とほぼ直角に位置しており、糸案内
２５の下縁即ち糸接触面ｆは第２図のようにボビンケー
ス１９の上面よりも下方に位置している。Further, this thread guide is located between the needle hole 26 and the bobbin case, and is also located approximately perpendicular to the cloth feeding direction, and the lower edge of the thread guide 25, that is, the thread contact surface f, is as shown in FIG. It is located below the upper surface of the bobbin case 19.

上記のような本考案装置の作用を第９図と対応する第１
０図の連動曲線を用いて説明する。The operation of the device of the present invention as described above is shown in Fig. 1, which corresponds to Fig. 9.
This will be explained using the interlocking curve shown in Figure 0.

第１０図は横軸に上軸の回転角、縦軸に天秤の上下によ
る糸供給量、針棒上下位置、送り歯水平位置及び上下位
置、釜糸喰量を示し、図中Ａは天秤による上糸供給曲線
、Ｂは針棒上下曲線、Ｃは送り歯水平前進曲線、Ｄは送
り歯上下曲線、Ｅは釜糸喰曲線、Ｆは針板上面である。In Figure 10, the horizontal axis shows the rotation angle of the upper shaft, and the vertical axis shows the amount of thread supplied by the top and bottom of the thread take-up, the vertical and vertical positions of the needle bar, the horizontal and vertical positions of the feed dog, and the amount of thread taken by the hook. B is the needle bar vertical curve, C is the feed dog horizontal advancement curve, D is the feed dog vertical curve, E is the hook thread feed curve, and F is the upper surface of the throat plate.

この第１０図において、その左側の０点から上軸が１回
転を始めると共に天秤が前工程に引続いて上昇を続けて
おり針棒は下降を始めている。In FIG. 10, the upper shaft starts one revolution from the zero point on the left side, the thread take-up continues to rise following the previous step, and the needle bar begins to descend.

即ちこの段階では前工程により形成した糸線めの最終工
程で送り歯は曲線Ｃ，Ｄの如（布を送っている。That is, at this stage, the feeding teeth are feeding the fabric as shown by curves C and D in the final process of the yarn formed in the previous process.

０点から６００回転たところでは天秤は最上点となり、
針は更に下降し、布は送られている。At 600 revolutions from the 0 point, the balance is at its highest point,
The needle descends further and the cloth is being fed.

およそ１００回転したところでは布は停止し、１８０回
転したところでは針は布を刺通して最下点に達する。After approximately 100 revolutions, the cloth stops, and after 180 revolutions, the needle pierces the cloth and reaches its lowest point.

この間天秤は下降を続けて上糸を供給している。During this time, the thread take-up continues to descend and supply the upper thread.

最下点に達した針が上昇を始め、更に挿通した上糸が布
でしごかれて小さいループができたとき第９図Ｉのよう
に全回転釜の剣先８が該ループａを捕捉する。When the needle that has reached the lowest point begins to rise and the needle thread that has been inserted is further squeezed by the cloth to form a small loop, the tip 8 of the full-rotation hook captures the loop a, as shown in Fig. 9 I. .

更に上軸が回転して２４０を少し回った頃に針が布上へ
抜けるが天秤はまだ下降しているから上糸の供給は続き
、この上糸が剣先８で捕捉されてボビンケース１９の外
側を回っているループａが第９図■のように拡大されて
行く。When the upper shaft rotates a little further and goes around 240, the needle slips out onto the fabric, but the thread take-up is still descending, so the upper thread continues to be supplied. The loop a going around the outside is expanded as shown in Figure 9 (■).

ループａが釜７の剣先から離脱し、フリーの状態となる
とき天秤が上昇し始め、布も前進を開始する。When the loop a leaves the tip of the hook 7 and becomes free, the balance begins to rise and the cloth also begins to move forward.

この引上げ工程において、糸引上げ側ｅはボビンケース
１９の下面から繰出されておりボビンケース１９の下面
の傾斜部１９Ａに案内され滑らかに引上げられる。In this pulling process, the thread pulling up side e is let out from the lower surface of the bobbin case 19, is guided by the inclined portion 19A on the lower surface of the bobbin case 19, and is pulled up smoothly.

この時ボビンケース１９の上面に位置する糸線り側ｄの
糸も同時に引上げられようとするがボビンケース１９の
上面より下方に位置する糸案内の接触面ｆで糸に屈曲が
生じこの屈曲部の糸と接触面ｆの間で抵抗が発生する。At this time, the thread on the thread line side d located on the upper surface of the bobbin case 19 is also about to be pulled up at the same time, but the thread is bent at the contact surface f of the thread guide located below the upper surface of the bobbin case 19, and this bent portion Resistance occurs between the thread and the contact surface f.

従って糸引上げ工程において、糸線り側ｄの糸が糸上げ
側ｅの糸と共に妄りに上昇するのが抑制される。Therefore, in the thread pulling process, the thread on the thread drawing side d is prevented from rising accidentally together with the thread on the thread lifting side e.

本考案は上記のように針板の下面に糸案内を設けてボビ
ンケースから外れたループの糸線り側にブレーキをかげ
るだけの極めて簡単な構造により糸線り側に大きな弛み
を生ずることを防止し、良好な縫目が得られるものであ
る。As mentioned above, the present invention has an extremely simple structure in which a thread guide is provided on the underside of the throat plate and a brake is applied to the threading side of the loop that has come off from the bobbin case, thereby preventing large slack from occurring on the threading side. This prevents this problem and allows good seams to be obtained.

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

第１図は本考案装置を用いたミシンの要部を示す平面図
、第２図は同上の一部縦断正面図、第３図は同上要部の
拡大縦断側面図、第４図は糸案内を取付けた針板の斜視
図、第５図は本考案装置の作用を示す拡大斜視図、第６
図は縫目の一例を示す平面図、第７図、第８図、第９図
は従来のミシンの縫成状態の工程別斜視図、第１０図は
連動曲線図である。 １・・・布、２・−・針、３・・・上糸、５・・・下糸
ボビン、６・・・下糸、７・・・水平全回転釜、８・・
・剣先、２２・・・針板、２５・・・糸案内、ａ・・・
ループ、ｂ、ｃ・・・縫目、ｄ・・・糸の締り側、ｅ・
・・糸の引上げ側。Fig. 1 is a plan view showing the main parts of a sewing machine using the device of the present invention, Fig. 2 is a partially longitudinal front view of the same as above, Fig. 3 is an enlarged longitudinal sectional side view of the main parts of the above, and Fig. 4 is a thread guide. Fig. 5 is an enlarged perspective view showing the operation of the device of the present invention, Fig. 6 is a perspective view of the throat plate with attached.
The figure is a plan view showing an example of a seam, FIGS. 7, 8, and 9 are perspective views of each step of the sewing state of a conventional sewing machine, and FIG. 10 is an interlocking curve diagram. 1...Fabric, 2...Needle, 3...Upper thread, 5...Bobbin thread bobbin, 6...Lower thread, 7...Horizontal full rotation hook, 8...
・Sword tip, 22...throat plate, 25...thread guide, a...
Loop, b, c...stitch, d...tight side of thread, e...
... Thread pulling side.

Claims (1)

【実用新案登録請求の範囲】 ｌ 上軸の回転と連動して上下動する針と、紋針に形成
したループを捕捉する剣先を含み、針の上下動と平行な
軸心のまわりを一方向に回動する水平全回転釜と、該水
平全回転釜の回転に伴い拡大されつつ水平全回転釜に装
着されたボビンケースの外側を周回せる前記ループを引
上げる天秤機構を有するジグザグミシンにあって、前記
天秤の糸引上げ工程において、前記ループの糸線り側が
糸引上げ側と共に上昇するのを抑制すべ（糸線り側の糸
に抵抗を加える糸案内を有し、該糸案内は針板の針孔と
前記ボビンケースの間において、布の送り方向とほぼ直
角に位置し、かつ針板下面より下方へ延出せしめたこと
を特徴とするジグザグミシンにおける水平全回転釜の糸
案内装置。 ２ 糸案内の先端はボビンケースの上面より下方に位置
せる実用新案登録請求の範囲第１項記載のジグザグミシ
ンにおける水平全回転釜の糸案内装置。[Claims for Utility Model Registration] l Includes a needle that moves up and down in conjunction with the rotation of the upper shaft and a tip that captures the loop formed on the pattern needle, and moves in one direction around the axis parallel to the up and down movement of the needle. A zigzag sewing machine has a horizontal full-rotation hook that rotates, and a balance mechanism that pulls up the loop that expands as the horizontal full-rotation hook rotates and goes around the outside of a bobbin case attached to the horizontal full-rotation hook. In the thread pulling process of the thread take-up, the thread threading side of the loop is prevented from rising together with the thread pulling side (it has a thread guide that applies resistance to the thread on the thread threading side, and the thread guide is connected to the throat plate). A thread guide device for a horizontal full-rotation hook in a zigzag sewing machine, characterized in that the thread guide device is located between the needle hole and the bobbin case, substantially perpendicular to the cloth feeding direction, and extends downward from the lower surface of the throat plate. 2. A thread guide device for a horizontal full-rotation hook in a zigzag sewing machine according to claim 1, wherein the tip of the thread guide is located below the top surface of the bobbin case.