JP5420606B2 - Intermittent stitch sewing machine - Google Patents

Intermittent stitch sewing machine Download PDF

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JP5420606B2
JP5420606B2 JP2011178835A JP2011178835A JP5420606B2 JP 5420606 B2 JP5420606 B2 JP 5420606B2 JP 2011178835 A JP2011178835 A JP 2011178835A JP 2011178835 A JP2011178835 A JP 2011178835A JP 5420606 B2 JP5420606 B2 JP 5420606B2
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尚邦 山本
五郎 小澤
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株式会社 山本始商店
五郎 小澤
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本発明は下型天秤の本縫いミシンを用いステッチ縫いをする間歇ステッチ縫いミシンに関し、詳しくは服地等の薄地から特種な厚地までの各種生地に対しステッチ縫いができる間歇ステッチ縫いミシンに係わるものである。   The present invention relates to a intermittent stitch sewing machine that performs stitch sewing using a main sewing machine of a lower scale, and more particularly to an intermittent stitch sewing machine that can perform stitch sewing on various fabrics from thin fabrics to special thick fabrics such as clothing. is there.

現在、一般に用いられている間歇ステッチ縫いミシンとしては、婦人服、紳士服やコートなどの衣類関係にあって所定の縫製位置や装飾箇所にステッチ縫いを施すミシン装置が知られている。この場合、ステッチ縫いに使用の生地は、ミシン自体やその針、糸等に掛かる負荷が比較的小さな薄い生地が主である。このため、例えば椅子やソファー等の家具類の表地や、自動車のシート類や同内装部材の如きに片面又は中間にクッション材等が付く厚い生地(特殊生地)に対するステッチ縫いでは、上糸に形成の下糸絡みになるカマ回転用弛みループも、その生地厚分だけ大きくせねば円滑なカマ回転がでず、従来ミシンをもって即厚地へのステッチ縫いには至らない。   2. Description of the Related Art Currently, as an intermittent stitch sewing machine that is generally used, there is known a sewing machine device that performs stitch sewing at a predetermined sewing position or decoration portion in a clothing relationship such as women's clothing, men's clothing, and a coat. In this case, the fabric used for stitch sewing is mainly a thin fabric with a relatively small load on the sewing machine itself, its needles, threads and the like. For this reason, for example, stitches on thick fabrics (special fabrics) with cushioning materials etc. on one side or in the middle, such as furniture surfaces such as chairs and sofas, automobile seats and interior parts, are formed on the upper thread. The slack loop for rotating the kama, which is entangled with the lower thread, will not be able to rotate smoothly unless it is increased by the thickness of the fabric, and stitch sewing to a thick fabric will not be possible with a conventional sewing machine.

特に、厚地使用等で直線のステッチ縫いから適宜折れ曲がる所謂角縫いにあっては、生地自体も適宜横振りせねばならず、これに伴い布押え等も甘くなり、且つ降下する縫い針の糸引っ掛けに起因する上糸締めも緩みステッチ飛びも招き易い。しかも、厚地では使用糸も太くなる関係上、その糸巻きから下型天秤に導く上糸自体にも糸巻き癖が付き易く、その巻き癖が撚り玉となり生地表に現われたり、ステッチ掛け時に生ずる生地表に出る2本糸も揃わず重なったり(平行せず)し、商品価値をも下げる。従って、厚地へのステッチ縫いは厚地専用の特殊ミシンの使用を余儀なくされ、未だステッチ縫いミシンの課題の一つとなっている。   Especially in the case of so-called square stitches that bend appropriately from straight stitch stitches due to the use of thick fabric, etc., the fabric itself must be properly swayed, and the presser foot, etc., will become sweet and the threaded needle of the sewing needle that descends accordingly. The upper thread tightening and loose stitching caused by this are easy to invite. In addition, because the thread used is thicker in thick ground, the upper thread itself that leads from the thread winding to the lower balance is also likely to have a thread curl, and the curly thread appears as a twisted ball or appears on the fabric surface. The two yarns that come out of the line are also not aligned and overlapped (not parallel), reducing the commercial value. Therefore, the stitch sewing to the thick fabric is forced to use a special sewing machine dedicated to the thick fabric, and is still one of the problems of the stitch stitch sewing machine.

ここで、縫製工場等にて使用の間歇ステッチ縫いミシンには、例えばフック付き針を用い普通糸の使用で縫着するステッチ機構を備えたミシン(特公昭58−357号公報参照)や、先に本件出願人が提示した間歇ステッチ縫いミシン(特開2006−68380号公報参照)等がある。だが、前者の特殊ステッチ機構付きミシンでは、糸巻きからの上糸を予め同装置に配設の糸切り装置部で一定長さにカットしたものを用いる関係上、連続したステッチ縫いはできない。後者の間歇ステッチ縫いミシンは、外観が簡略化される下型天秤の本縫いミシンで、ベッド下部の天秤の動作で繰出す上糸を、所定の間歇運動で針板下面に臨むルーパー部糸孔に導き、これを昇降の縫い針で所定生地を経てベッド上部に移行し縫い目を付け、該上糸を別途降下する引掛け爪に引掛ける等をしてカマ回転用ループを形成し、該ループをベッド下部に戻し下方に回転するカマ装置に掛けて下糸絡みの所定カマ回転をし、前記の針落ち位置に臨まない上糸の非下糸絡みとでステッチ縫いをする。   Here, the intermittent stitch sewing machine used in a sewing factory or the like includes, for example, a sewing machine (see Japanese Patent Publication No. 58-357) having a stitch mechanism that is sewn using a normal thread using a needle with a hook. For example, there is an intermittent stitch sewing machine (see JP-A-2006-68380) presented by the present applicant. However, in the former sewing machine with a special stitch mechanism, continuous stitch stitching cannot be performed because the upper thread from the bobbin is cut in a predetermined length by the thread trimming device provided in the apparatus in advance. The latter intermittent stitch sewing machine is a bottom-stitched, main-stitch sewing machine whose appearance is simplified. The upper thread that is fed out by the operation of the lower balance of the bed, the looper thread hole that faces the lower surface of the needle plate with a predetermined intermittent movement To the upper part of the bed after passing through a predetermined fabric with a raising and lowering needle, and forming a loop for rotating the kama by hooking the upper thread on a hooking claw that descends separately. Is returned to the lower part of the bed and hung on a rotary device which rotates downward, and the predetermined thread rotation of the lower thread is performed, and stitch sewing is performed with the non-lower thread entanglement of the upper thread which does not reach the needle drop position.

これら前記ミシンに用いる生地は、主に薄地の使用で糸も細い。なお、厚地に対するステッチ縫いの動作も基本的には薄地と同様である。だが、前記した上糸に形成のカマ回転用弛みループは、ベッド上部での上糸を爪引掛けして成すため、引掛け爪の降下位置が薄地用に予め設定してあれば、厚地使用では降下する引掛け爪の下端が先ず生地縁に触れて捲れ、生地を縫い出る上糸まで針が届かず、上糸の引掛けができない。   The fabric used for these sewing machines is mainly thin and has a thin thread. The stitch sewing operation for thick ground is basically the same as for thin ground. However, since the slack loop for rotating the kama formed on the upper thread is formed by hooking the upper thread at the top of the bed, if the lowering position of the hooking nail is preset for thin ground, use heavy ground. Then, the lower end of the descending hooking nail first touches the edge of the fabric, and the needle does not reach the upper thread that sews the fabric, and the upper thread cannot be hooked.

また、従来ミシンにおけるテーブル台(脚卓)とミシン本体との支持機構は、テーブル台面に配すセット用嵌合溝孔部にミシン本体基部周縁を嵌合載置し、該本体の片側隅部(手前隅位置)に突設の支持軸(ヒンジ軸)を前記嵌合溝孔部の片側隅に配した軸承部に嵌挿し、ミシン本体を手前側に起立(90度回動)自在の構成とし、必要に応じ該本体を横倒し底面露出でボビン交換や機械点検を容易とする。だが、今までの前記支持軸の突設位置は、ミシン本体の重心線上より一番遠く離れた片隅gにあり(図8のB参照)一種の片支持構造を呈すため、ミシン本体の起立回動等に際しミシン本体の全荷重が支持軸に掛り重く容易でない。従って、ミシン扱いが多い婦女子等にあって面倒な作業の一つとなる。   In addition, the support mechanism between the table base (leg table) and the sewing machine main body in the conventional sewing machine is such that the peripheral edge of the base of the sewing machine main body is fitted and placed in the fitting groove hole for setting arranged on the table base surface. A support shaft (hinge shaft) projecting at the (front corner position) is fitted into a bearing portion disposed at one corner of the fitting groove hole portion, and the sewing machine body can stand up (turn 90 degrees) freely. If necessary, the main body is laid down so that bobbin replacement and machine inspection can be easily performed by exposing the bottom surface. However, the projecting position of the support shaft up to now is at one corner g farthest from the center of gravity line of the sewing machine body (see B in FIG. 8), and exhibits a kind of single-support structure. When moving, the total load of the sewing machine body is applied to the support shaft and is not easy. Therefore, it is one of the troublesome work for women and women who often handle sewing machines.

更に、従来のステッチ縫いミシンでの角縫い部分は、生地を単に廻し縫い方向を変えるだけで角部縫い目が続かず、片方が縫い目に他方がステッチ間隙で、区画のない間の抜けた角縫いになり商品価値を下げる。   Furthermore, the corner stitching part of a conventional stitch sewing machine does not continue the corner seam simply by turning the fabric and changing the sewing direction, one side is the stitch and the other is the stitch gap, and the corner stitch is missing between the sections. And reduce the product value.

特公昭58−357号公報Japanese Patent Publication No.58-357 特開2006−68380号公報JP 2006-68380 A

即ち、前記間歇ステッチ縫いミシンは下型天秤の本縫いミシンで、詳しくはミシン本体上軸の回転を1/2にして連動のベッド下部の駆動軸に、更に1/2回転にする天秤用カム機構を設け、このカム体のカム変位に応じ擺動レバーを介し下型天秤を揺動し上糸を繰出し、且つ同駆動軸より別途伝達する速度の違う2本のルーパー用連動杆のリンク機構で8の字形状の軌跡を描く間歇運動をするルーパー装置部の糸孔を、針板下面の所定針落ち位置に臨ませる。また、ベッド上部にはミシン本体上軸の回転を1/2にしたループ引掛け爪付き昇降杆を設け、該昇降杆に上軸の回転を1/2にして連動する横振り機構も組込み上糸ループ兼ループ外しの補助天秤装置部とし、更に上軸からクランク機構を介し昇降する縫い針付き針支持装置部も併設した構成で、複雑な装置となる。従って、ステッチ縫いに際するミシン取扱いやメンテナンス等も容易でなく、面倒となる。   That is, the intermittent stitch sewing machine is a main sewing machine of the lower scale, and more specifically, the balance cam is halved by rotating the upper shaft of the sewing machine main body to 1/2 and further rotating to the drive shaft below the interlocking bed. This is a link mechanism for two looper interlocking rods with different speeds that swings the lower balance through the swing lever to feed the upper thread according to the cam displacement of the cam body and feeds the upper thread separately from the drive shaft. The thread hole of the looper device part that performs the intermittent motion to draw the figure 8 locus is caused to face a predetermined needle drop position on the lower surface of the needle plate. In addition, the upper part of the bed is provided with an elevating rod with a loop hooking claw that halves the rotation of the upper shaft of the sewing machine body, and a horizontal swing mechanism that interlocks with the elevating rod by halving the rotation of the upper shaft is also incorporated. The auxiliary balance device unit is a thread loop and loop remover unit, and further includes a needle support device unit with a sewing needle that moves up and down from the upper shaft via a crank mechanism, which makes a complicated device. Therefore, it is not easy to handle and maintain the sewing machine at the time of stitch sewing, which is troublesome.

しかも、この間歇縫いミシンで一番の問題点は、前記の様に上糸に形成するカマ回転用弛みループにある。この弛みループは、あくまでベッド上部位置の上糸を別途降下の引掛け爪に引っ掛けてなすため、ベッド上部に複雑機構の引掛け爪付き補助天秤装置部を要し、その引掛け爪の降下位置も薄地に限定され、所定生地以外(厚地など)の使用はない。   In addition, the biggest problem with the seam sewing machine is the slack loop for rotating the kama formed on the upper thread as described above. Since this slack loop is made only by hooking the upper thread at the upper part of the bed to the lowering hook claw, it requires an auxiliary balance device with a hooking hook with a complicated mechanism at the upper part of the bed. Is also limited to thin areas, and there is no use of anything other than a predetermined fabric (such as thick areas).

なお、縫製工場等では縫製工程の都合上、使用生地も薄地から厚地等に切替えることもある。だが、従来型ミシンの使用では、上糸のループ形成がベッドに移行の上糸を引掛け爪に直接引っ掛ける関係上、生地厚の規制に繋がった。このループ形成を、ベッド上部の上糸を直接爪引っ掛けせず、上糸がベッド下部に戻るときの天秤の下方揺動を大とし、ベッド下部位置に上糸を大きく引っ張っても同様なループ繰出しもできる。このことは、生地厚規制を受けないステッチ縫いも可能になる。   In a sewing factory or the like, the fabric used may be switched from thin to heavy for convenience of the sewing process. However, with the use of conventional sewing machines, the loop formation of the upper thread led to regulation of the fabric thickness because the upper thread transferred to the bed was hooked directly onto the hook. This loop formation does not directly hook the upper thread on the bed, but the swinging of the balance when the upper thread returns to the lower part of the bed is increased, and even if the upper thread is pulled largely to the lower position of the bed, the same loop feeding You can also. This also enables stitch sewing that is not subject to fabric thickness restrictions.

この場合、天秤の揺動は、該天秤基部に配すカム機構のカム体改良でよい。このカム体のカム部を、上糸の初期繰出し用カム部とカマ回転ループ用カム部が連続する多段形状とし、ベッド下部にてループ用上糸引っ張りをすることで、従来ベッド上部で行うループ成形工程が省略される。延いては、生地厚規制もなく、前記課題が一挙に解消される点に着眼し、実験を重ね遂に各種生地に対応のステッチ縫いミシンに到る。   In this case, the swing of the balance may be improved by a cam body of a cam mechanism disposed on the balance base. The cam part of this cam body has a multi-stage shape in which the upper thread initial feeding cam part and the cam rotation loop cam part are continuous, and the upper thread is pulled at the lower part of the bed, so that the loop that is conventionally performed at the upper part of the bed The molding process is omitted. As a result, there is no regulation on the thickness of the fabric, and attention is paid to the fact that the above-mentioned problems can be solved at once, and the stitch sewing machine corresponding to various fabrics is reached through repeated experiments.

本発明は上記実情に鑑み、下型天秤のカム機構のカム体を、上糸を段階的に下方へ繰出す多段カム体とし、このうち第一のカム部による天秤の揺動で上糸を間歇運動するルーパー装置部の糸孔が針板下面に臨むとき繰出し、該糸を縫い針でベッド上部へ移行し所定縫い目を付けて戻る時、天秤が第二のカム部の追加の下方揺動で上糸をベッド下部へ大きく引き戻してループ用繰出しとし、これを直接カマ回転する様にし、上記課題を解決する各種生地に対しステッチ縫いする間歇ステッチ縫いミシンを提供することを目的とした。   In the present invention, in view of the above circumstances, the cam body of the cam mechanism of the lower balance is a multi-stage cam body that feeds the upper thread downward stepwise, and the upper thread is moved by the swing of the balance by the first cam portion. When the thread hole of the looper unit that moves intermittently faces the lower surface of the needle plate, the balance moves to the upper part of the bed with a sewing needle, and when returning with a predetermined seam, the balance further swings downward in the second cam part. Then, the upper thread is largely pulled back to the lower part of the bed to feed out the loop, which is directly rotated by a hook, and an object is to provide an intermittent stitch sewing machine that performs stitch sewing on various fabrics that solve the above problems.

本発明は、ミシン本体上軸よりの回転を1/2にするベッド下部の駆動軸に連設した天秤用カム機構と、該カム機構のカム体で揺動する下型天秤と、前記駆動軸より分岐した2本の速度の違うルーパー用連動杆のリンク機構で8の字形状の軌跡を描く間歇運動にてルーパー部糸孔が針板下面に臨むルーパー装置部と、同駆動軸より別途連動するボビン付半回転型カマ及びドライバー部を備えた下糸用カマ装置部と、同駆動軸に連動する所定の裏地送り機構を配置し、ベッド上部にミシン本体上軸に連動する所定の添え針付縫い針機構と布送り体及び押え金等を配設し、ベッド下部の上糸を下型天秤の揺動で針落ち位置のルーパー部糸孔に導き、これを縫い針で生地を経てベッド上部に移行し縫い目を付けて適宜引っ張りループ形成しながらベッド下部に戻し、この上糸ループをカマ装置部に引掛け下糸が絡むカマ回転と、前記の針落ち位置に臨まない下糸が絡まない上糸逃げとで縫い目を1ピッチ抜かしステッチ縫いする間歇ステッチ縫いミシンにおいて、前記下型天秤のカム機構のカム体を、上糸の初期繰出し用第一カム部とループ繰出し用第二カム部をエンドレスカム溝に連続形成した円盤状多段カム体とし、前記第一カム部による天秤の下方揺動で繰出す上糸を所定間歇運動するルーパー部糸孔が針落ち位置にきたとき導く上糸一次繰出しとし、上糸をベッド上部に移行し縫い目を付けてベッド下部に戻る時、天秤が第二カム部で追加の下方揺動をして上糸をベッド下部へ大きく引っ張る上糸二次繰出し天秤上糸繰出し機構とし、前記天秤の追加の下方揺動幅が、ベッド上部からの上糸戻りに起因する緩みに抗する引っ張りも兼ねカマ回転近傍まで導く上糸のループ繰出し長で、上糸にカマ装置部が掛かるとき前記カム部の終端で引っ張りが終えて緩む弛みループと、該弛みループをカマ装置部に引掛け下糸が絡むカマ回転をし、前記の針落ち位置に臨まない下糸が絡まない上糸とでステッチ縫いするものである。 The present invention relates to a cam mechanism for a balance that is connected to a drive shaft at the bottom of the bed that halves the rotation from the upper shaft of the sewing machine body, a lower balance that swings with a cam body of the cam mechanism, and the drive shaft. The looper device part where the looper thread hole faces the lower surface of the needle plate by the intermittent movement that draws the 8-shaped locus with the link mechanism of two more branched interlocking hooks for loopers with different speeds, and linked separately from the drive shaft A bobbin-equipped semi-rotating type hook and a bobbin thread kama device unit equipped with a driver unit and a predetermined lining feed mechanism that operates in conjunction with the drive shaft are arranged, and a predetermined accessory needle that operates in conjunction with the upper shaft of the sewing machine main body A sewing needle mechanism, cloth feeder and presser foot are arranged, and the upper thread at the bottom of the bed is guided to the looper thread hole at the needle drop position by swinging the lower balance, and this is passed through the fabric with the sewing needle. while forming a transition appropriately pulling loop with a seam at the top The upper thread loop is hooked on the hook device and the lower thread is entangled with the rotation of the upper thread, and the upper thread escapes where the lower thread does not entangle with the needle drop position. In the intermittent stitch sewing machine, the cam mechanism of the cam mechanism of the lower scale balance is a disc-shaped multistage cam body in which the first cam portion for initial feeding of the upper thread and the second cam portion for loop feeding are continuously formed in the endless cam groove. The upper thread that is fed by the first cam part by swinging the balance downward is the upper thread primary feeding that leads when the looper thread hole that moves in the predetermined distance reaches the needle drop position, and the upper thread is shifted to the upper part of the bed and stitched. when returning to the lower bed with, the balance is a balance on the yarn feeding mechanism in the yarn secondary feed on pulling a large upper yarn to the bed bottom and the additional downward swing at the second cam portion, the additional of the balance Lower swing width is bed In the loop feeding length of needle thread guiding up also serves as sickle rotation vicinity tension against loosening due to upper thread return from parts, slack loosening finished is pulled at the end of the cam portion when the hook device portion upper thread take The loop and the slack loop are hooked on the hook device portion, the hook thread is entangled, and the lower thread that does not reach the needle drop position is stitch-sewn with the upper thread.

角縫い機構が、裏地用水平送り軸の二又ロッドに配す縫い目ダイヤルが臨む第1支点軸に送り調節レバーを介し可動型第2支点軸を連設し、該第2支点軸に所定の角縫い信号で作動する送りパルスモータを適宜連動部材にて連結し、前記パルスモータの駆動に連動し送り調節レバーを可動し第2支点軸位置を変えて縫い目送り量を変更する。   A square stitching mechanism is connected to a movable second fulcrum shaft via a feed adjustment lever on a first fulcrum shaft facing a seam dial arranged on a bifurcated rod of a horizontal feed shaft for lining, and a predetermined predetermined value is connected to the second fulcrum shaft. A feed pulse motor that operates in response to a corner sewing signal is appropriately connected by an interlocking member, and the feed adjustment lever is moved in conjunction with the driving of the pulse motor to change the second fulcrum shaft position to change the stitch feed amount.

上糸の糸調子が、一対の調子皿をスライド型支持軸部の前方部分に所定間隔で配設し、支持軸部後端に縫着終了信号に起因し働く糸緩め用ソレノイドを取付け、前記支持軸部をソレノイドの作動でスライドさせ両調子皿の間隔を広げる。   The thread tension of the upper thread is arranged with a pair of tension plates at a predetermined interval in the front part of the slide type support shaft part, and a thread loosening solenoid that is caused by a sewing end signal is attached to the rear end of the support shaft part, The support shaft is slid by the operation of the solenoid to widen the distance between the two trays.

上糸用糸巻き取付け手段が、機体下部外方へ水平突設した短軸の中空固定支持軸に、糸巻きをセットする長軸の糸孔付き中空案内軸部を嵌め二重支持軸構成とし、前記中空固定支持軸が取付く機体下部の支持脚部に、頂部に糸潜り用撚り止め駒を配す傾斜案内杆を起立してなる。   The upper thread bobbin attaching means has a double-supported shaft structure in which a hollow guide shaft portion with a long-shaft thread hole for setting a bobbin thread is fitted to a short-shaft hollow fixed support shaft projecting horizontally outward from the lower part of the machine body, An inclined guide rod is disposed on the support leg portion at the lower part of the machine body to which the hollow fixed support shaft is attached.

テーブル台に載置するミシン本体の支持機構が、ミシン本体基部の片隅部に突出する支持軸を、ミシン本体の片側隅位置より該ミシン本体の重心線上側に適宜幅ずらして突設し、該支持軸を受けるテーブル台側嵌合溝部に設ける軸承部も前記支持軸のずれた位置に対向して配設することにより、ミシン本体の支持点を全体としてミシン本体重心線側へずらす重心移動型支持機構とした。 The support mechanism of the sewing machine main body placed on the table base is provided with a support shaft protruding from one corner of the sewing machine main body base so that the support shaft is appropriately shifted from the position of one side corner of the sewing machine body above the center of gravity line of the sewing machine main body. A center of gravity moving type in which the support point of the sewing machine main body is shifted toward the center of gravity line of the sewing machine body as a whole by disposing the bearing part provided in the fitting groove on the table base side that receives the support shaft to face the shifted position of the support shaft. A support mechanism was used.

この様に、本発明の間歇ステッチ縫いミシンは、下型天秤を揺動するカム機構のカム体を、上糸の初期繰出し用第一カム部とループ繰出し用第二カム部が連続する多段カム体とし、この第一カム部のカム変位にて揺動する天秤の上糸を所定の間歇運動する針落ち位置に臨むルーパー装置部の糸孔に導き、これを縫い針の昇降で所定生地を経てベッド上部に移行し縫い目を付けて針と供に戻る時、天秤が次段の第二カム部を受け更に下方揺動をし、上糸を縫い針の戻りに起因する緩みに抗しベッド下方へ大きく引っ張り、カマ回転近傍で前記カム部が終え上糸引っ張りが緩み、その弛みを所定ループとする。然る後、このループを下方に回転のカマ装置部に引っ掛けて所定カマ回転をし、前記の針落ち位置に臨まない下糸が絡まない状態の上糸とでステッチ縫いとする。   In this way, the intermittent stitch stitching machine of the present invention has a cam body of a cam mechanism that swings the lower balance, a multi-stage cam in which the first cam portion for initial feeding of the upper thread and the second cam portion for loop feeding are continuous. The upper thread of the balance that swings due to the cam displacement of the first cam part is guided to the thread hole of the looper device part facing the needle drop position where it moves for a predetermined period of time, and the predetermined fabric is fed by raising and lowering the sewing needle. After that, when moving to the upper part of the bed and returning to the needle together with the seam, the balance receives the second cam part of the next stage and swings further downward to prevent the upper thread from loosening due to the return of the sewing needle. Pulling greatly downward, the cam portion ends near the rotation of the hook, and the upper thread tension is loosened. The slack is defined as a predetermined loop. After that, the loop is hooked on the rotary device unit that rotates downward to rotate it for a predetermined time, and stitch sewing is performed with the upper thread in a state where the lower thread that does not reach the needle drop position is not entangled.

即ち、上糸に形成のカマ回転用弛みループは、ベッド上部にて上糸を別途の引掛け爪による爪引掛けで成す従来方式でなく、あくまでベッド上部の上糸が縫い針と供にベッド下部へ戻る時、天秤を第二カム部で下方へ大きく追加揺動させ、上糸戻りによる緩みもなくベッド下部の所定位置まで上糸を引っ張り、この引っ張りを前記カムの終りで緩め弛みループとする。基本的に上糸の繰出しは、単一の天秤と二つのカム部をもつカム体の組合せでよく、この二つのカム変位に応じ天秤を段階的に下方揺動し、ベッド上部の上糸のベッド下部への戻り時に該上糸を所定位置まで下方へ引っ張りループ形成とし、それを直ちにカマ回転すればよく、簡易な上糸の繰出し機構となる。   In other words, the slack loop for rotating the kama formed on the upper thread is not a conventional method in which the upper thread is hooked with a separate hooking claw at the upper part of the bed, but the upper thread on the upper part of the bed is used together with the sewing needle. When returning to the lower part, the balance is greatly swung downward by the second cam part, and the upper thread is pulled to a predetermined position at the lower part of the bed without loosening due to the return of the upper thread, and this tension is loosened at the end of the cam to loosen the loop. To do. Basically, the upper thread can be fed by a combination of a single balance and a cam body having two cam portions. The balance is swung downward stepwise according to the displacement of the two cams, and When returning to the lower part of the bed, the upper thread is pulled downward to a predetermined position to form a loop, which can be immediately rotated to form a simple upper thread feeding mechanism.

次に、ステッチ縫いで問題な角縫い部分の縫い目の連続も可能とする。裏地用水平送り軸を連結した二又ロットに固定の縫い目ダイヤルが臨む上軸中心となる第1支点軸に、送り調節レバーを介し可動型第2支点軸を連設し、第2支点軸を所定角縫い信号で作動する送りパルスモータに連結部材を介在して連動とし、常時は第1支点軸の軸線上よりずれた位置とし二又ロッドを上下動させる第2支点軸を、角縫いで前記パルスモータのモータ軸の回転に応じ第1支点軸の軸線上まで回動移行し、二又ロッドを単なる揺動とし生地送り量が0位にし、両側縫い目が連続する。   Next, it is also possible to continue the stitches at the corner stitches which are problematic in stitch stitching. A movable second fulcrum shaft is connected via a feed adjustment lever to the first fulcrum shaft that is the center of the upper shaft where the fixed seam dial faces the bifurcated lot connected to the lining horizontal feed shaft. The feed pulse motor that operates in response to a predetermined angle sewing signal is interlocked with a connecting member, and the second fulcrum shaft that moves the bifurcated rod up and down is always square-sewn with the position shifted from the axis of the first fulcrum shaft. In accordance with the rotation of the motor shaft of the pulse motor, the shaft moves to the axis of the first fulcrum shaft, the bifurcated rod is simply swung, the cloth feed amount becomes zero, and both-side seams are continuous.

また、上糸用糸調子は、一対の調子皿をスライド型支持軸部に所定間隔で配設し、該支持軸部後端に糸緩め用ソレノイドを連設し、縫製終了信号に起因し該ソレノイドを作動し、この作動軸の突出にて前記支持軸部をスライドさせ、両調子皿の間隔を挾持バネに抗し適宜ずらし、調子皿の挾持間隔を広げて上糸の挾持を自動的に緩める。   In addition, the thread tension for the upper thread has a pair of tension plates arranged at a predetermined interval on the slide type support shaft portion, and a thread loosening solenoid is continuously provided at the rear end of the support shaft portion. Operate the solenoid, slide the support shaft with the protrusion of this operating shaft, shift the interval between the two tension plates against the holding spring as appropriate, widen the interval between the tension plates and automatically hold the upper thread loosen.

また、糸巻き取付け手段は、機体外方へ水平突設した短軸の中空固定支持軸に糸巻きセットする長軸の中空案内軸部を挿嵌し堅牢な二重支持軸構成とし、糸巻きからの上糸を、前記中空案内軸部先端の糸口へ反転挿入し同芯の中空固定支持軸を貫通し、機体下部の取付基端部より導出し傾斜案内杆の上端の撚り止め駒へ導くので、上糸に糸撚りが有っても、その撚りは二重支持軸への段階的な案内と方向転換及び引張りとしごきが順次なされ、糸撚りが次第に解され直糸となり糸調子へ排出される。   In addition, the bobbin mounting means has a robust double support shaft structure by inserting a long hollow guide shaft portion to be wound on a short hollow fixed support shaft that is horizontally projected outward from the machine body. Since the thread is inverted and inserted into the thread guide at the tip of the hollow guide shaft, penetrates the concentric hollow fixed support shaft, is led out from the mounting base end at the bottom of the machine body, and is guided to the anti-twisting piece at the upper end of the inclined guide rod. Even if there is a yarn twist in the yarn, the twist is gradually guided to the double support shaft, the direction is changed, and the tension and the ironing are sequentially performed, and the yarn twist is gradually released to become a straight yarn and discharged to the yarn tension.

更に、テーブル台に載置するミシン本体の支持機構は、ミシン本体の両側に突設の支持軸位置を、従来の遠く離れた片隅位置よりミシン本体の重心線側に適宜幅移行したずれ突設とし、テーブル台側の軸承部も同位置に対向させ重心移動型支持機構にしたので、ミシン本体の起立回動等にあって、支持軸に掛る本体荷重は、該本体の重心線側にずらした幅分だけ一種のテコ作用が働き軽減され、本体の回動操作が容易となる。   Furthermore, the support mechanism of the sewing machine main body placed on the table base is shifted so that the supporting shaft positions protruding on both sides of the sewing machine main body are appropriately shifted in width from the conventional far-off one corner position to the center of gravity line side of the sewing machine main body. Since the bearing part on the table base side is also opposed to the same position to make the center of gravity moving support mechanism, the main body load on the support shaft is shifted to the center of gravity line side of the main body when the sewing machine body is standing up and turning, etc. As a result, a kind of lever action is reduced and the rotation of the main body becomes easy.

以上述べた様に、本発明の間歇ステッチ縫いミシンは下型天秤の間歇縫いミシンで、天秤を揺動するカム機構のカム体を二つのカム部が連続の多段カム体とし、天秤による上糸の繰出しを、前記カム部中、第一カム部でルーパー装置部の糸孔に導き縫い針でベッド上部へ移行し縫い目を付け戻るとき、天秤に第二カム部が働き追加の下方揺動で上糸をベッド下部へ強制引っ張りし、カム変位の終りで引っ張りを止め緩む上糸をループとする。即ち、ステッチ縫いに要する上糸の弛みループは、あくまでベッド下部位置での天秤の揺動のみで成し、従来の様にベッド上部にあって特段な引掛け爪付き補助天秤装置もなく簡易で、引掛け爪に起因する生地厚規制も受けない。従って、ステッチ縫い生地も薄地からクッション材等が付く特殊生地(厚地)まで対応し得、当業者にとって福音となる。   As described above, the intermittent stitch sewing machine of the present invention is the intermittent stitch sewing machine of the lower scale, and the cam body of the cam mechanism that swings the balance is a multi-stage cam body with two cam portions, and the upper thread by the balance. When the first cam part is guided to the thread hole of the looper device part in the cam part, the second cam part works on the balance and moves to the upper part of the bed with the sewing needle and the seam is returned. The upper thread is forcibly pulled to the lower part of the bed, and the upper thread that stops and loosens at the end of the cam displacement is the loop. In other words, the upper thread slack loop required for stitch sewing is only a swing of the balance at the lower position of the bed, and it is simple without the auxiliary balance device with a special hooking claw at the upper part of the bed as in the past. Also, it is not subject to fabric thickness restrictions due to hooking nails. Therefore, the stitch-stitched fabric can correspond from a thin fabric to a special fabric (thick fabric) with a cushion material or the like, which is a gospel for those skilled in the art.

また、カム体の形状は、カム本体周囲のエンドレスカム溝に二つのカム部を連続した単一カム体でよく、このカム溝に天秤側作動子を嵌めるだけの簡易組合せで、誤動作のないカム伝達を得る。しかも、カム溝は円盤状カム体の片面に刻設した簡易形状でよく、製作が容易で量産に適する。特に、使用する生地厚や糸径等に変更があってもカム溝の微調整等で済み、この点からも取扱いが良好なカム体を呈す。   The shape of the cam body may be a single cam body in which two cam parts are connected to the endless cam groove around the cam body, and a cam that does not malfunction by simply combining the balance-side actuator in this cam groove. Get transmission. In addition, the cam groove may be a simple shape carved on one side of the disc-shaped cam body, which is easy to manufacture and suitable for mass production. In particular, even if there is a change in the material thickness or thread diameter to be used, fine adjustment of the cam groove is sufficient, and from this point of view, a cam body that can be handled well is obtained.

勿論、天秤は二つのカム部の連続した下方揺動でよく高速回転が望まれるミシン装置に最適である。しかも、ベッド上部からベッド下部への上糸戻り時に天秤を更なる下方揺動で引っ張ればよく、特段な繰出し機構もなく、カム部の終了で自動的に引っ張りが緩み所定ループとなる。しかも、縫い針自体の動作には影響せず、円滑なステッチ縫いを得る。   Of course, the balance is suitable for a sewing machine in which two cam portions are continuously swung downward and high speed rotation is desired. In addition, when the upper thread returns from the upper part of the bed to the lower part of the bed, the balance only has to be pulled further downward, there is no special feeding mechanism, and the pull is automatically loosened at the end of the cam part to form a predetermined loop. In addition, smooth stitch sewing is obtained without affecting the operation of the sewing needle itself.

更に、ステッチ縫いで、角縫いに望まれる両側に縫い目を連続させるには、所定の二又ロッドに配す縫い目ダイヤルが臨む第1支点軸に送り調節レバーを介し可動型第2支点軸を連設し、第2支点軸を所定角縫い信号で作動する別途送りパルスモータに連動し、該第2支点軸を上軸中心の第1支点軸の中心線上に移行し、生地の送り量を自動的に0位にし、簡単に両側縫い目が連続し、商品価値を高める。   Further, in order to continue stitches on both sides desired for square stitching by stitch stitching, the movable second fulcrum shaft is connected via a feed adjustment lever to the first fulcrum shaft facing the stitch dial arranged on a predetermined bifurcated rod. The second fulcrum shaft is linked to a separate feed pulse motor that operates with a predetermined angle sewing signal, and the second fulcrum shaft is shifted to the center line of the first fulcrum shaft, which is the center of the upper shaft. In the second place, the seams on both sides are easily continuous, increasing the product value.

また、糸調子は両調子皿を配すスライド型支持軸部端に縫着終了信号で働くソレノイドを設け、該ソレノイドの作動で前記支持軸部を突き両調子皿の間隔を自動的に広げ、縫着終了時の上糸外しを容易とする。また、ミシンテーブル台に対するミシン本体の支持機構は、ミシン本体の角隅部に配す支持軸をミシン本体の重心線側に適宜幅ずらし重心移動型支持機構としたので、該支持軸に掛かる本体荷重が重心移行幅分だけ軽減され、回動操作が容易で、ミシン扱いが多い婦女子等に朗報である。   In addition, the thread tension is provided with a solenoid that works in response to a sewing end signal at the end of the slide type support shaft portion where the two tone plates are arranged, and the solenoid is actuated to push the support shaft portion and automatically widen the interval between the two tone plates. Easy thread removal at the end of sewing. In addition, the support mechanism of the sewing machine body with respect to the sewing machine table is a center-of-gravity moving support mechanism in which the support shaft arranged at the corners of the sewing machine body is appropriately shifted to the center of gravity line side of the sewing machine body. The load is reduced by the center of gravity shift width, easy to rotate, and good news for women and women who often handle sewing machines.

しかも、糸巻き取付け手段を、水平突設の中空固定支持軸に糸巻きをセットする長軸中空案内軸部を嵌め二重支持軸とし、糸巻きの上糸を中空案内軸部先端から同芯の中空固定支持軸内へ反転挿入し機体側固定端より傾斜案内杆を経て撚り止め駒へ導くため、上糸に糸撚りが付いても前記支持軸への段階的な方向転換と引張り等が相俟って順次撚りが解され直糸になり、ステッチ縫い表面に糸瘤等も招かず良好な仕上がりを得る。   In addition, the bobbin mounting means is a double support shaft by fitting a long shaft hollow guide shaft portion that sets the bobbin on a horizontally fixed hollow fixed support shaft, and the upper thread of the bobbin is fixed concentrically from the tip of the hollow guide shaft portion. Since it is inverted and inserted into the support shaft and guided from the fixed end on the machine body through the inclined guide rod to the twisting piece, even if the upper thread is twisted, there is a combination of stepwise direction change and tension to the support shaft. As a result, the twists are sequentially unwound and turned into a straight thread, and a good finish is obtained without inducing a thread or the like on the stitched surface.

本発明の間歇ステッチ縫いミシンの実施例を示す要部の正面図である。It is a front view of the principal part which shows the Example of the intermittent stitch sewing machine of this invention. 同背面図である。It is the same rear view. 同要部を示す側面図である。It is a side view which shows the principal part. 同ミシン本体下面より見た伝達機構の要部を示す説明図である。It is explanatory drawing which shows the principal part of the transmission mechanism seen from the sewing machine main body lower surface. 同糸巻き取付け手段の要部を示す説明で、(A)は斜視図、(B)は一部切り欠き説明図である。It is description which shows the principal part of the same thread winding attachment means, (A) is a perspective view, (B) is a partially notched explanatory drawing. 同下型天秤を揺動するカム機構のカム体の説明で、(A)は平面図で、(B)は斜視図である。It is description of the cam body of the cam mechanism which rock | fluctuates the same type | mold balance, (A) is a top view, (B) is a perspective view. 同糸調子の要部を示す説明図である。It is explanatory drawing which shows the principal part of the same thread tension. ミシンテーブル台とミシン本体を載置する支持機構の説明で、(A)は本発明の要部を示す説明図で、(B)は従来の支持機構の説明図である。It is description of the support mechanism which mounts a sewing machine table stand and a sewing machine main body, (A) is explanatory drawing which shows the principal part of this invention, (B) is explanatory drawing of the conventional support mechanism. 前記カム体のカム溝と下型天秤の位置関係を示す説明で、(A)はカム溝の第一カム部に天秤用作動子が臨む説明図、(B)は第一カム部のカム変位で天秤が下方揺動し上糸の初期繰出しをする説明図である。It is description which shows the positional relationship of the cam groove of the said cam body, and a lower type | mold balance, (A) is explanatory drawing in which the actuator for balances faces the 1st cam part of a cam groove, (B) is the cam displacement of a 1st cam part. FIG. 6 is an explanatory view in which the balance swings downward and the upper thread is initially fed. 前記カム体のカム溝と下型天秤の位置関係を示す説明で、(A)はカム溝の第二カム部に天秤用作動子が臨む説明図で、(B)は第二カム部で天秤が追加の下方揺動をして上糸を更に下方へ引っ張り弛みループの繰出しをする説明図である。It is description which shows the positional relationship of the cam groove of the said cam body, and a lower type | mold balance, (A) is explanatory drawing in which the operator for balances faces the 2nd cam part of a cam groove, (B) is a balance in a 2nd cam part. FIG. 6 is an explanatory diagram for further downward swinging and pulling the upper thread further downward to extend the slack loop. 同ベッド下部にあって、ルーパー部糸孔が8の字形状の軌跡を描く間歇運動のリンク機構をもつルーパー装置部の要部を示す説明図である。It is explanatory drawing which shows the principal part of the looper apparatus part which has the link mechanism of the intermittent movement which is located in the lower part of the bed and a looper part thread hole draws an 8-shaped locus. 同半回転型カマ装置部の要部を示す説明で、(A)はボビンをセットするカマ部を組込む説明図、(B)は同カマ枠内に配設のドライバー機構部の説明図である。It is description which shows the principal part of the semi-rotation type | mold kama apparatus part, (A) is explanatory drawing incorporating the hook part which sets a bobbin, (B) is explanatory drawing of the driver mechanism part arrange | positioned in the same kama frame. . カマ装置部において太糸対応のドライバー部の説明で、(A)はドライバー部の片側に起立の受け片部の説明図、(B)はカマから抜け出る上糸を前記受け片部で長く保持しボビンケースからの下糸に所定間隔を保つ説明図である。In the explanation of the driver unit corresponding to the thick thread in the hook device part, (A) is an explanatory view of the receiving piece part standing upright on one side of the driver part, and (B) is a long holding of the upper thread coming out of the hook in the receiving piece part. It is explanatory drawing which maintains a predetermined space | interval in the bobbin thread from a bobbin case. 同裏地送り機構の要部を示す説明図である。It is explanatory drawing which shows the principal part of the same lining feed mechanism. 同裏地送り機構にあって角縫いの要部説明で、(A)は送りパルスモータの駆動で二又ロッドの可動型第2支点軸を、上軸中心となる第1支点軸と水平送りレバーの中心線上に移行する説明図、(B)は送りパルスモータを備えず適宜バネ等で第2支点軸を回動した従来のステッチ縫いを示す説明図である。In the lining feed mechanism, the main part of the corner stitching is explained. (A) is a feed type pulse motor driven by a movable second fulcrum shaft of a bifurcated rod, a first fulcrum shaft centered on the upper shaft, and a horizontal feed lever. FIG. 7B is an explanatory diagram showing a conventional stitch sewing in which the second fulcrum shaft is appropriately rotated by a spring or the like without including a feed pulse motor. 同角縫い部分の縫い目の説明で、(A)は角縫いで両側の縫い目が連続する説明図、(B)は縫い針の降下調整がない従来の両側縫い目が続かない説明図である。FIG. 5A is an explanatory diagram in which the stitches on both sides are continuous by square stitching, and FIG. 5B is an explanatory diagram in which a conventional double-sided seam without adjusting the lowering of the sewing needle is not continued. 同上布送りと上布押さえの関係を示す説明図である。It is explanatory drawing which shows the relationship between the same cloth feed and an upper cloth presser. 同針支持装置部の説明で、(A)はミシン上軸の公知のクランク機構にて昇降する二重構造型針棒の説明図で、(B)は同針棒に付く縫い針と添え針の関係を示す説明図である。In the description of the needle support device, (A) is an explanatory view of a double-structure needle bar that is raised and lowered by a known crank mechanism of the upper shaft of the sewing machine, and (B) is a sewing needle and an attached needle attached to the needle bar. It is explanatory drawing which shows these relationships. 同上糸と下糸の縫着関係を示す説明で、(A)は縫い針を最上位に待機した説明図、(B)は同ルーパー部と針落ち位置の関係の説明図である。It is the explanation which shows the sewing relation of the same upper thread and lower thread, (A) is the explanation drawing which waits the sewing needle in the highest rank, (B) is the explanation drawing of the relationship between the looper section and the needle drop position. 同上糸と下糸の縫着関係を示す説明で、(A)は縫い針を針板に通し下方の針落ち位置より外した説明図、(B)は同ルーパー部と針落ち位置の関係を示す説明図である。It is the explanation which shows the sewing relation of the same upper thread and lower thread, (A) is the explanation drawing which passes the sewing needle through the needle plate and removes from the lower needle drop position, (B) shows the relationship between the looper part and the needle drop position. It is explanatory drawing shown. 同上糸と下糸の縫着関係を示す説明で、(A)は縫い針で上糸を引上げた針を針板下方に刺し針落ち位置より外した説明図、(B)は針落ち位置を回ったルーパー部の位置関係を示す説明図である。It is the explanation which shows the sewing relation of the same upper thread and the lower thread, (A) is the explanation drawing where the needle which pulled up the upper thread with the sewing needle is pierced below the needle plate and removed from the needle drop position, (B) is the needle drop position It is explanatory drawing which shows the positional relationship of the looper part which turned. 同上糸と下糸の縫着関係を示す説明で、(A)は天秤が更に下方揺動しループ用上糸引っ張りの説明図、(B)は同ルーパー部と針落ち位置の関係を示す説明図である。It is the explanation which shows the sewing relationship of the same upper thread and lower thread, (A) is the explanation drawing of the upper thread pull for the loop further swinging downward, (B) the explanation which shows the relationship between the looper part and the needle drop position FIG. 同上糸と下糸の関係を示す説明で、(A)は前記引き下げた上糸をカム部の終わりで緩めカマ剣先に引掛ける説明図、(B)はルーパー部と針落ち位置の関係を示す説明図である。The relationship between the upper thread and the lower thread is explained. (A) is an explanatory diagram in which the lowered upper thread is loosened at the end of the cam part and hooked on the tip of the hook sword, and (B) shows the relation between the looper part and the needle drop position. It is explanatory drawing. 同上糸と下糸の関係を示す説明で、(A)はその上糸ループ部をカマの周囲に回す説明図、(B)は針落ち位置を回ったルーパー部の説明図である。It is the explanation which shows the relationship between the same upper thread and lower thread, (A) is the explanation drawing which turns the upper yarn loop section around the hook, (B) is the explanation drawing of the looper section which turns around the needle drop position. 所定生地に間歇ステッチの縫い端の糸止めを示す説明で、(A)は平面図、(B)は上糸を引っ掛け下糸の絡み部を生地にめり込ませ糸止めした説明図である。It is explanation which shows the thread stop of the stitch end of the intermittent stitch to a predetermined cloth, (A) is a top view, (B) is an explanatory view which hooked the upper thread and entangled the entanglement part of the lower thread into the cloth and fastened the thread. .

以下、本発明の間歇ステッチ縫いミシンを実施例の図について説明すれば、次の通りである。   Hereinafter, the intermittent stitch sewing machine of the present invention will be described with reference to the drawings.

図1乃至図24はミシン本体ベッド下部に天秤を配す下型天秤の間歇ステッチ縫いミシンの要部を示す実施例である。1はミシン本体2に設けた上軸3の回転を、適宜伝達機構4を介し1/2回転にするベッド部5の下部に配設の駆動軸6に連設した下型天秤用カム機構で、該カム機構1は円盤状カム体7の周囲に刻設したエンドレスカム溝8(図6のA、B参照)に天秤用作動子10を嵌め、該作動子10を受ける基端枢着の揺動部材11に設けた摺動部11aに、所定の糸通し孔9aと糸巻き側の第2の糸通し孔9a’が付く天秤9の基端部に一体の可動片部9bに突設した連動軸12を連結する。この場合、前記カム体7のカム溝8の形状は、上糸の初期繰出し用第一カム部8aとループ繰出し用第二カム部8bを所定間隔に連続した多段カム体の構成で、天秤9を段階的に下方へ揺動する。13はミシン本体2の針板14の下方位置に臨むルーパー装置部で、該ルーパー装置部13は前記駆動軸6の回転を適宜伝達する連動軸15に、傘歯車等の伝達機構16を介し分岐した速さが異なる2本の前後動するルーパー用連動杆17a、17bを配設し、リンク機構を呈す前記各連動杆の先端を、上糸用糸孔18が付くルーパー部19の端と該ルーパー部19を載置する下段支持板20の端に連結し、この2点の枢着点の回動で糸孔18を8の字形状の軌跡を描く間歇運動とする(図11参照)。21は前記駆動軸6より別途公知の連動機構(図示せず)を介し連動する半回転型ドライバー兼カマ用下軸で、該下軸21に所定カマ22を組込むカマ装置部23を配設する。24はカマ装置部23の下方に配置する上糸用糸調子で(図7参照)、該糸調子24は2枚の所定間隔の調子皿24a、24bと調整バネ24c及び調子ナット24dを芯軸である支持軸部24eの先端部分に配し、該支持軸部後端に、縫製終了の信号で作動する糸緩め用ソレノイド25を設けた構成である。このソレノイド25は、所定信号の作動で作動軸25aが突出し支持軸部24eを突けば、所定の糸挾持間隔をもつ両調子皿24a、24bが、調整バネ24cの押圧に抗し押し広げられ糸挾持が緩み上糸外しを容易とする。   FIG. 1 to FIG. 24 show an embodiment of a main part of the intermittent stitch stitch sewing machine in which a balance is arranged at the lower part of the machine body bed. 1 is a cam mechanism for a lower balance that is connected to a drive shaft 6 provided at the lower part of a bed portion 5 that makes the rotation of the upper shaft 3 provided in the sewing machine body 2 to 1/2 rotation through a transmission mechanism 4 as appropriate. The cam mechanism 1 has a base end pivotally mounted to receive the actuator 10 by fitting a balance actuator 10 into an endless cam groove 8 (see FIGS. 6A and 6B) engraved around the disc-shaped cam body 7. A movable piece portion 9b integrated with a base end portion of a balance 9 having a predetermined threading hole 9a and a second threading hole 9a 'on the winding side is provided on a sliding portion 11a provided on the swing member 11. The interlocking shaft 12 is connected. In this case, the shape of the cam groove 8 of the cam body 7 is a multi-stage cam body in which the first cam portion 8a for initial feeding of the upper thread and the second cam portion 8b for loop feeding are continuously arranged at a predetermined interval. Is swung downward stepwise. Reference numeral 13 denotes a looper device portion that faces a position below the needle plate 14 of the sewing machine body 2. The looper device portion 13 branches to an interlocking shaft 15 that appropriately transmits the rotation of the drive shaft 6 via a transmission mechanism 16 such as a bevel gear. Two looper interlocking rods 17a and 17b that move back and forth at different speeds are arranged, and the tip of each interlocking rod that exhibits a link mechanism is connected to the end of the looper portion 19 to which the upper thread yarn hole 18 is attached. The looper portion 19 is connected to the end of the lower support plate 20 on which the looper portion 19 is placed, and the thread hole 18 is moved intermittently to draw an 8-shaped trajectory by rotating these two pivot points (see FIG. 11). Reference numeral 21 denotes a lower shaft for a semi-rotating driver and hook that is linked to the drive shaft 6 via a known linkage mechanism (not shown), and a hook device portion 23 that incorporates a predetermined hook 22 is disposed on the lower shaft 21. . Reference numeral 24 denotes an upper thread thread tension disposed below the kama device section 23 (see FIG. 7). The thread tension 24 includes two tension plates 24a and 24b, an adjustment spring 24c and a tension nut 24d at predetermined intervals. This is a configuration in which a thread loosening solenoid 25 is provided at the tip end portion of the support shaft portion 24e and actuated by a sewing end signal at the rear end portion of the support shaft portion. In the solenoid 25, when the operation shaft 25a protrudes by the operation of a predetermined signal and protrudes the support shaft portion 24e, the two tension plates 24a and 24b having a predetermined thread holding interval are pushed and spread against the pressing of the adjustment spring 24c. The holding is loosened and the upper thread is easily removed.

26は機体27の下部横方へ水平突設する糸巻き取付け手段で(図5参照)、機体に基端固定の短軸の糸巻き受け用中空固定支持軸28に、糸巻き29を嵌合セットする長軸の中空案内軸部30を嵌め、該中空案内軸部30の基部内周と中空固定支持軸28を、中空固定支持軸28側に予め嵌めた公知のくさび締め駒31を摺動移行し両壁面を押圧し所定のくさび締めをして堅牢な二重支持軸32とする。この場合、糸巻き29からの上糸aは、中空案内軸部30の先端に導き糸口30aへ反転挿入し、同芯の中空固定支持軸28の軸内28aを通り機体側取付け端口28bより導出させ、更に機体27の固定脚部27aに起立した傾斜案内杆33へ立ち上げ、上端の撚り止め駒34に形成の複数の糸潜り溝部35を順次潜らせる構成で、これら全体で糸撚り戻し機構37となる。ここで、上糸aに糸撚りが生じても、該糸は前記二重支持軸32への反転挿入と段階的な引っ張りを受け、且つ終端の撚り止め駒34で複数の糸潜りで糸しごきも受け、順次糸撚りが解かれ直糸となり天秤側へ送られる。   Numeral 26 is a thread winding attachment means horizontally projecting to the lower side of the machine body 27 (see FIG. 5), and is a length for fitting and setting a thread spool 29 on a short thread winding receiving hollow fixed support shaft 28 fixed to the machine body at the base end. A hollow guide shaft portion 30 of the shaft is fitted, and a known wedge fastening piece 31 fitted in advance on the inner periphery of the base portion of the hollow guide shaft portion 30 and the hollow fixed support shaft 28 on the hollow fixed support shaft 28 side is slid and transferred. The wall surface is pressed and a predetermined wedge is tightened to form a robust double support shaft 32. In this case, the upper yarn a from the bobbin 29 is led to the tip of the hollow guide shaft portion 30 and inverted and inserted into the yarn port 30a, passes through the shaft 28a of the concentric hollow fixed support shaft 28, and is led out from the machine body side mounting end port 28b. Further, it is configured to rise up to the inclined guide rod 33 standing on the fixed leg portion 27a of the machine body 27 and to sequentially hide the plurality of yarn dive grooves 35 formed in the upper-end twist-stopping piece 34, and the yarn twist-back mechanism 37 as a whole. It becomes. Here, even if the upper thread a is twisted, the thread is subjected to reverse insertion into the double support shaft 32 and stepwise pulling, and the terminal threading piece 34 is used to squeeze with a plurality of thread dives. The yarn is then untwisted and turned straight to be sent to the balance.

38はミシンテーブル台39に載置するミシン本体2の支持機構(ヒンジ構造)で(図8参照)、該支持機構38はミシン本体2の基盤部2aの片側隅部に突設する支持軸40の位置を、従来の様にミシン本体の重心線jより一番遠く離れた片側隅gに配設した支持軸40’(図8のB参照)でなく、該片側隅gより重心線j側へ適宜幅dをずらして突設している(図8のA参照)。支持軸40に対する軸承部42もテーブル台39の嵌合溝部43に対向して配設し、ミシン本体2の支持荷重全体としミシン本体重心線側へずれる重心移動型支持機構38Aとしている。この支持軸40に受ける本体荷重は重心がずれた幅分だけテコ作用で軽減され、ミシン本体2の回動を良好とする。
Reference numeral 38 denotes a support mechanism (hinge structure) of the sewing machine main body 2 placed on the sewing machine table 39 (see FIG. 8). The support mechanism 38 protrudes from a corner on one side of the base portion 2a of the sewing machine main body 2. The position of is not the support shaft 40 '(see B in FIG. 8) disposed at the one-side corner g farthest from the center of gravity line j of the sewing machine body as in the prior art, but the center-of-gravity line j side from the one-side corner g. The width d is appropriately shifted to the front (see A of FIG. 8). Bearing unit 42 with respect to the support shaft 40 is also opposite to the fitting groove 43 of the table top 39 is disposed, and the centroid moving type supporting mechanism 38A the support load of the sewing machine main body 2 is shifted to the whole and to the sewing machine body centroid line side. The load on the main body received by the support shaft 40 is reduced by the lever action by the width of the shift of the center of gravity, and the rotation of the sewing machine main body 2 is improved.

また、前記カマ装置部23の詳細としては、駆動軸6より適宜伝達のドライバー兼カマ用下軸21に配す回転基盤21aに一体のドライバー部44にカマ22がセットされる構成で、このドライバー部自体は片側に円弧状案内溝45が付く屈曲壁部46と対称側に受け片部47を起立させ、且つ直交位置に前記案内溝45に臨む糸押え爪48が付く制御駒49を配設している。この場合、前記受け片部47の形状を、図13のA、Bに示す様に、回転方向を鋭突出部47aとし基方に向け幅広となる弯曲案内面47bが付く幅広受け片部47’とすれば、太い糸の使用でもカマ22を回る上糸aの繰出しは、該幅広受け片部47’を添う傾斜案内にて弛みなく繰出され円滑なカマ抜けとなり、且つカマ内ボビンから導出の下糸bにも支障を来さない。   Further, the details of the kama device unit 23 include a configuration in which the kama 22 is set in a driver unit 44 integrated with a rotary base 21a disposed on a lower shaft 21 for a driver-and-kama appropriately transmitting from the drive shaft 6. The part itself has a bent wall part 46 with an arcuate guide groove 45 on one side and a receiving piece part 47 on the symmetrical side and a control piece 49 with a thread presser claw 48 facing the guide groove 45 at an orthogonal position. doing. In this case, as shown in FIGS. 13A and 13B, the shape of the receiving piece portion 47 is a wide receiving piece portion 47 ′ having a curved guide surface 47b with a rotation direction as a sharp protrusion 47a and a width toward the base. Then, even when a thick thread is used, the upper thread a that extends around the hook 22 is drawn out smoothly without slack by the inclined guide along the wide receiving piece 47 ', and is smoothly removed from the inner bobbin. It does not interfere with the lower thread b.

50はベッド部5の下部に配設の裏地送り機構で、この裏地送り機構は前記ミシン本体の回転軸3の偏心輪部3aより分岐伝達する公知の二又ロッド51の下端に水平送りレバー52aを介した水平送り軸52と、回転軸3より別途偏心伝達する二又ロッドに対しハ状配設のもう一つのロッド53の下端に上下送りレバー54aを介し配す上下送り軸54とをベッド下部両側に並設し、且つ該水平送り軸52の先端に突設の水平送り腕55と上下送り軸54の先端の上下送り腕56とに、中間に裏地用送り歯57が付く送り上台58の両端を差し渡す連結をし、この送り歯57に所定の裏地送りをする。この場合、二又ロッド51の上部に配した公知の縫い目ダイヤル59が臨む上軸中心上の第1支点軸60には、送り調節レバー(カム)61をもって可動型第2支点軸62を連設する。この第2支点軸62は、常時は第1支点軸60と下端の水平送りレバー52aを結ぶ中心線上より外れた横位置とし該二又ロッド51に所定の上下動をさせる。更に、前記第2支点軸62には、送り量0を検出する原点センサー63が付く送りパルスモータ(ステッピングモータ)64を、そのモータ軸64aに突設の送り調節腕65とリンク66を介在して連設とし、これら全体で角縫い機構67となる。固定位置となる第2支点軸62を、前記中心線上までモータ駆動で送り調節レバー61を作動し移動させれば、二又ロッド51は単なる揺動だけになり送り量が実質0になる。   Reference numeral 50 denotes a lining feed mechanism disposed at the lower portion of the bed portion 5. This lining feed mechanism is provided with a horizontal feed lever 52a at the lower end of a known bifurcated rod 51 that branches and transmits from the eccentric ring portion 3a of the rotary shaft 3 of the sewing machine body. And a vertical feed shaft 54 disposed via a vertical feed lever 54a at the lower end of another rod 53 arranged in a C-shaped manner with respect to the bifurcated rod that transmits eccentricity separately from the rotary shaft 3. A feed upper base 58 that is arranged side by side on both sides of the lower part, and has a horizontal feed arm 55 protruding from the tip of the horizontal feed shaft 52 and a vertical feed arm 56 at the tip of the vertical feed shaft 54, with a feed dog 57 for lining in the middle. The both ends are connected to each other, and a predetermined lining is fed to the feed dog 57. In this case, a movable second fulcrum shaft 62 is connected to a first fulcrum shaft 60 on the center of the upper shaft facing a known stitch dial 59 disposed on the top of the bifurcated rod 51 with a feed adjusting lever (cam) 61. To do. The second fulcrum shaft 62 is normally in a lateral position off the center line connecting the first fulcrum shaft 60 and the horizontal feed lever 52a at the lower end, and causes the bifurcated rod 51 to move up and down a predetermined distance. Further, the second fulcrum shaft 62 is provided with a feed pulse motor (stepping motor) 64 provided with an origin sensor 63 for detecting a feed amount 0, and a feed adjustment arm 65 and a link 66 protruding from the motor shaft 64a. The corner stitching mechanism 67 is formed as a whole. If the second fulcrum shaft 62, which is the fixed position, is moved by moving the feed adjusting lever 61 by motor driving to the center line, the bifurcated rod 51 is merely swung and the feed amount becomes substantially zero.

即ち、角縫い機構67を用い角縫いにあって両側縫い目を連続させるとき、角縫い信号を受け送りパルスモータ64を駆動し、モータ軸64aを所定ステップ角だけ回転させれば、送り調節腕65を介しリンク66を移行し送り調節レバー61が回動する。このレバー61に一体の第2支点軸62の位置を、所定バネ(図示せず)で回動しているレバー61を上軸に連なる第1支点軸(ピン)60の中心線上まで移動させる(図15のB参照)。第2支点軸62が上軸中心の第1支点軸60と同一線上になれば、前記上軸3の偏心輪部3aが回転しても第2支点軸62を中心にピン(第1支点軸)は単なる揺動だけで、二又ロッド51の上下動は0に近い(生地の送り量0)。この様に、送りパルスモータ64の駆動で送り調節レバー61を介し第2支点軸62の位置を変え水平送りの量を変換する方式で、簡単に角縫いで両側の縫い目が連続する。例えば、図16のAに示す様に、送りパルスモータ64の作動で第2支点軸62の位置を第1支点軸60と同一線上にするだけで、二又ロッド51の上下動は0に近くステッチ間隙eがなく両縫い目aが連続する。勿論、角縫い機構67のない従来ミシンでは、角縫い箇所でも所定間隙eが介在され縫い目連続はない(同図のB参照)。なお、図15のAにあって送り調節腕65の回動角を、別途の機械的動作(図示せず)で同図矢印方向m(右方向)にすれば、送り量が大きくなる。   That is, when the angle stitching mechanism 67 is used for corner stitching and both side stitches are made continuous, the angle adjusting signal is received, the pulse motor 64 is driven, and the motor shaft 64a is rotated by a predetermined step angle. Then, the link 66 is moved through and the feed adjusting lever 61 is rotated. The position of the second fulcrum shaft 62 integral with the lever 61 is moved to the center line of the first fulcrum shaft (pin) 60 connected to the upper shaft of the lever 61 rotated by a predetermined spring (not shown) ( (See B in FIG. 15). If the second fulcrum shaft 62 is collinear with the first fulcrum shaft 60 at the center of the upper shaft, the pin (first fulcrum shaft is centered on the second fulcrum shaft 62 even if the eccentric ring portion 3a of the upper shaft 3 rotates. ) Is merely swinging, and the vertical movement of the forked rod 51 is close to 0 (the feed amount of the dough is 0). In this way, by driving the feed pulse motor 64, the position of the second fulcrum shaft 62 is changed via the feed adjustment lever 61 and the amount of horizontal feed is converted, and the stitches on both sides are easily continuous by square stitching. For example, as shown in FIG. 16A, the vertical movement of the bifurcated rod 51 is close to 0 just by making the position of the second fulcrum shaft 62 collinear with the first fulcrum shaft 60 by the operation of the feed pulse motor 64. There is no stitch gap e and both seams a are continuous. Of course, in the conventional sewing machine without the corner stitching mechanism 67, the predetermined gap e is interposed even at the corner stitching portion and the stitches are not continuous (see B in the figure). In FIG. 15A, if the rotation angle of the feed adjusting arm 65 is changed to the arrow direction m (right direction) by a separate mechanical operation (not shown), the feed amount increases.

68はミシン本体2の前端部に配設した上軸3より公知のクランク機構(図示せず)を介し昇降する縦支持軸部で、その下端に針板14に臨む押え金69が付く構成で、且つ該縦支持軸部68の側部には別途分岐する横連動軸70より公知の連動機構を介し連動の布送り用布送り体71を併設し、該布送り体下端の二股案内溝部72に前記押え金69が嵌り込む公知の構造で(図17参照)、押え金69と布送り体71は交互の昇降と前後動をもって所定の布送りをする。73は前記上軸3より所定クランク機構を介し昇降するミシン本体先端部に配す公知の二重軸構造の針棒で、該針棒73の下端部に縫い針74を取付け、縫い針74が針棒73の降下で所定生地Aに縫い刺さる。このとき、縫い針74は側部に縦刻設の案内溝部74aに、側部に設けた支持駒75に取付く添え針76が一定降下量だけ添う構成で、該添え針で縫い針74に切り欠くフック口74bを塞ぎ生地引っ掛けを招かない。   Reference numeral 68 denotes a vertical support shaft portion that moves up and down via a known crank mechanism (not shown) from the upper shaft 3 disposed at the front end portion of the sewing machine body 2, and has a structure in which a presser foot 69 facing the needle plate 14 is attached to the lower end thereof. In addition, a cloth feed body 71 for interlocking cloth feeding is provided alongside a known interlocking mechanism from a lateral interlocking shaft 70 that branches separately on the side portion of the vertical support shaft section 68, and a bifurcated guide groove 72 at the lower end of the cloth feeding body. In the known structure in which the presser foot 69 is fitted (see FIG. 17), the presser foot 69 and the cloth feed body 71 perform a predetermined cloth feed by alternately moving up and down and moving back and forth. 73 is a known double-shaft needle bar disposed at the tip of the sewing machine main body that moves up and down from the upper shaft 3 through a predetermined crank mechanism. A sewing needle 74 is attached to the lower end of the needle bar 73, and the sewing needle 74 is When the needle bar 73 is lowered, it is stabbed into the predetermined fabric A. At this time, the sewing needle 74 has a structure in which a supplementary needle 76 attached to a support piece 75 provided on the side part is attached to the guide groove part 74a vertically formed on the side part by a certain amount of drop, and the sewing needle 74 is attached to the sewing needle 74 with the supplementary needle. The hook port 74b that is notched is closed to prevent the fabric from being caught.

ここにおいて、針板14の下面に臨むルーパー部19の糸孔18は、所定リンク機構で8の字形状の軌跡fの運動をして糸孔が軌跡後部f’の針落ち位置cに来たとき縫い針74が降下する。これ以外の状態では、カマ22が回転しても剣先で上糸aを捕えず、上糸aがカマ22の外周を回らない。この状態では、上糸aが内部収容のボビンケース77から出る下糸bに絡まず1回遊びとなる(図20のBから図21のB参照)。このとき、天秤9を作動する作動子10の位置は、上糸の初期繰出しになるカム溝8の第一カム部8aに臨み、このカム変位に応じ天秤9は所定量の下方揺動をして上糸の初期繰出しとする。この後、降下の縫い針74は所定の戻り動作で上昇するが、このとき上糸aはフック口74bに掛かり生地を抜けて引き上げられる(図21参照)。縫い針74の上昇時には、前記の中途待機の添え針76が添うので円滑な生地抜けに至る。   Here, the thread hole 18 of the looper portion 19 facing the lower surface of the needle plate 14 has moved in the shape of an 8-shaped locus f by a predetermined link mechanism, and the thread hole has come to the needle drop position c of the locus rear part f ′. When the sewing needle 74 descends. In other states, even when the hook 22 rotates, the upper thread a is not caught by the sword tip, and the upper thread a does not go around the outer periphery of the hook 22. In this state, the upper thread a does not get entangled with the lower thread b coming out of the internally housed bobbin case 77 (see FIG. 20B to FIG. 21B). At this time, the position of the actuator 10 that operates the balance 9 faces the first cam portion 8a of the cam groove 8 where the upper thread is initially fed, and the balance 9 swings downward by a predetermined amount according to the cam displacement. The initial take-up of the upper thread. Thereafter, the lowering sewing needle 74 is raised by a predetermined return operation. At this time, the upper thread a is hooked on the hook port 74b and pulled up through the cloth (see FIG. 21). When the sewing needle 74 is raised, the above-mentioned standby needle 76 is attached, so that the fabric is smoothly removed.

更に、縫い針74が再度降下する時、天秤9の作動子10は第二カム部8bに移動し、そのカム変位に応じ該天秤9を追加の下方揺動をして上糸aを大きく下方へ引っ張り、その繰り出し長が弛みループ用の上糸部分となる。この上糸の繰出し長は、前記の様に天秤9の追加(二次)の下方揺動幅hで決まる(図10のB参照)。縫い針74の降下で上糸aは下方へ強制的に引っ張られるが、この引っ張りは前記カム部の終端で終え自動的に緩み上糸部分を弛みループa’とする。即ち、上糸のカマ回転用弛みループは、あくまでベッド下部位置で直接形成される(図23参照)。この後、上糸の弛みループa’は直ちに半回転するカマ装置部23のカマ22の剣先22aに引っ掛けられる。勿論、天秤9自体は第二のカム変位にて強制的な下方揺動をするだけでよく、誤動作のない作動を得る。   Further, when the sewing needle 74 descends again, the operator 10 of the balance 9 moves to the second cam portion 8b, and the balance 9 is further swung downward in accordance with the cam displacement to greatly lower the upper thread a. Pulled to the upper part of the thread for the slack loop. The feeding length of the upper thread is determined by the additional (secondary) downward swing width h of the balance 9 as described above (see B in FIG. 10). The upper thread a is forcibly pulled downward by the lowering of the sewing needle 74, but this pulling ends at the end of the cam part and automatically loosens, and the upper thread part becomes a slack loop a '. That is, the slack loop for rotating the upper thread is directly formed at the lower position of the bed (see FIG. 23). Thereafter, the slack loop a 'of the upper thread is immediately hooked on the sword tip 22a of the hook 22 of the hook device portion 23 that rotates half turn. Of course, the balance 9 itself only needs to be forced to swing downward by the second cam displacement, and an operation without malfunction is obtained.

また、上糸aの弛みループ部分は、回転して来るカマ22の剣先22aが針板14の下部位置にあって引っ掛けて回るため、該カマ22内のボビンケース77より繰出される下糸bに対し確実に潜り抜ける。このとき、押え金69が上昇し、布送り体71も後退し所定の布送りを得る。また、天秤9はカム動作で上位になってルーパー部19の糸孔18は8の字形状の軌跡fの前半位置f”(絡み位置)に移る。なお、縫い針74の昇降とカマ22の回転及び天秤9の全体としての位置関係詳細は、図20乃至図24に図示した通りである。   Further, the slack loop portion of the upper thread a is rotated by the sword tip 22a of the rotating paddle 22 at the lower position of the needle plate 14, so that the lower thread b fed from the bobbin case 77 in the paddle 22 is drawn. It will definitely dive through. At this time, the presser foot 69 is raised, and the cloth feed body 71 is also retracted to obtain a predetermined cloth feed. Further, the balance 9 is raised by the cam operation, and the thread hole 18 of the looper portion 19 moves to the first half position f ″ (entanglement position) of the 8-shaped locus f. The details of the positional relationship of the rotation and the balance 9 as a whole are as shown in FIGS.

この様に、カマ22が回転すれば(図24参照)、上糸aの弛みループa’がカマ22の周囲を回り、カマ内のボビンケース部77から出る下糸bと供に円滑に繰出される。このとき、天秤9は引き下げられ上糸を張ると共に所定の布送りがなされ、天秤9が完全に上位になったとき布送りも止まり、初めて縫い目ができ縫い終わりとなる。   In this way, when the hook 22 rotates (see FIG. 24), the slack loop a ′ of the upper thread a goes around the hook 22 and smoothly feeds along with the lower thread b coming out of the bobbin case portion 77 in the hook. Is done. At this time, the balance 9 is pulled down, the upper thread is tensioned, and a predetermined cloth feed is performed. When the balance 9 is completely in the upper position, the cloth feed is stopped, and a stitch is formed for the first time and the sewing is finished.

ここでの縫着縫い目は、図25のA、Bに示す様に生地Aの表面に表れる上糸aは下糸bが1回絡まない状態で1回布送りされ、上糸aのループa’が1回おきに表面を引かれ下糸bに掛かる状態となり、所定の間隔eを隔てるステッチ縫いになる。   In this case, as shown in FIGS. 25A and 25B, the upper thread a appearing on the surface of the fabric A is fed once without the lower thread b being entangled once, and the loop a of the upper thread a 'Is pulled every other time and is put on the lower thread b, and stitch sewing is performed at a predetermined interval e.

単一のカム体を、二つのカム部が連続したエンドレスカム溝の形状にすれば、コンパクトなカム機構の利用に寄与し得る。   If a single cam body is formed into an endless cam groove shape in which two cam portions are continuous, it can contribute to the use of a compact cam mechanism.

1 下型天秤用カム機構
2 ミシン本体
3 上軸
5 ベッド部
7 カム体
8 エンドレスカム溝
8a 初期繰出し用第一カム部
8b ループ繰出し用第二カム部
13 ルーパー装置部
14 針板
18 上糸用糸孔
19 ルーパー部
21 下軸
22 カマ
23 カマ装置部
24 糸調子
25 糸緩め用ソレノイド
26 糸巻き取付け手段
28 中空固定支持軸
29 糸巻き
30 中空案内軸部
32 二重支持軸
34 撚り止め駒
37 糸撚り戻し機構
38 ミシン本体の支持機構
39 テーブル台
40 本体側支持軸
41 テーブル側軸承部
44 ドライバー部
47 ドライバー部の受け片部
50 裏地送り軸
51 二又ロッド
52 水平送り軸
54 上下送り軸
57 送り歯
60 第1支点軸
61 送り調節レバー
62 可動型第2支点軸
64 送りパルスモータ
67 角縫い機構
68 縦支持軸部
69 押え金
71 布送り体
73 針棒
74 縫い針


DESCRIPTION OF SYMBOLS 1 Cam mechanism for lower scale balance 2 Sewing machine main body 3 Upper shaft 5 Bed part 7 Cam body 8 Endless cam groove 8a First cam part for initial feeding 8b Second cam part for loop feeding
DESCRIPTION OF SYMBOLS 13 Looper apparatus part 14 Needle plate 18 Upper thread thread hole 19 Looper part 21 Lower shaft 22 Cama 23 Comb apparatus part 24 Thread tension 25 Thread release solenoid 26 Thread winding attachment means 28 Hollow fixed support shaft 29 Thread winding 30 Hollow guide shaft part 32 Double support shaft 34 Unscrewing piece 37 Thread twist return mechanism 38 Support mechanism 39 of the sewing machine body Table base 40 Main body side support shaft 41 Table side bearing portion 44 Driver portion 47 Driver portion receiving piece portion 50 Lining feed shaft 51 Bifurcated rod 52 Horizontal feed shaft 54 Vertical feed shaft 57 Feed dog 60 First fulcrum shaft 61 Feed adjustment lever 62 Movable second fulcrum shaft 64 Feed pulse motor 67 Square stitching mechanism 68 Vertical support shaft 69 Presser foot 71 Cloth feed body 73 Needle bar 74 Sewing needle


Claims (5)

ミシン本体上軸よりの回転を1/2にするベッド下部の駆動軸に連設した天秤用カム機構と、該カム機構のカム体で揺動する下型天秤と、前記駆動軸より分岐した2本の速度の違うルーパー用連動杆のリンク機構で8の字形状の軌跡を描く間歇運動にてルーパー部糸孔が針板下面に臨むルーパー装置部と、同駆動軸より別途連動するボビン付半回転型カマ及びドライバー部を備えた下糸用カマ装置部と、同駆動軸に連動する所定の裏地送り機構を配置し、ベッド上部にミシン本体上軸に連動する所定の添え針付縫い針機構と布送り体及び押え金等を配設し、ベッド下部の上糸を下型天秤の揺動で針落ち位置のルーパー部糸孔に導き、これを縫い針で生地を経てベッド上部に移行し縫い目を付けて適宜引っ張りループ形成しながらベッド下部に戻し、この上糸ループをカマ装置部に引掛け下糸が絡むカマ回転と、前記の針落ち位置に臨まない下糸が絡まない上糸逃げとで縫い目を1ピッチ抜かしステッチ縫いする間歇ステッチ縫いミシンにおいて、前記下型天秤のカム機構のカム体を、上糸の初期繰出し用第一カム部とループ繰出し用第二カム部をエンドレスカム溝に連続形成した円盤状多段カム体とし、前記第一カム部による天秤の下方揺動で繰出す上糸を所定間歇運動するルーパー部糸孔が針落ち位置にきたとき導く上糸一次繰出しとし、上糸をベッド上部に移行し縫い目を付けてベッド下部に戻る時、天秤が第二カム部で追加の下方揺動をして上糸をベッド下部へ大きく引っ張る上糸二次繰出し天秤上糸繰出し機構とし、前記天秤の追加の下方揺動幅が、ベッド上部からの上糸戻りに起因する緩みに抗する引っ張りも兼ねカマ回転近傍まで導く上糸のループ繰出し長で、上糸にカマ装置部が掛かるとき前記カム部の終端で引っ張りが終えて緩む弛みループと、該弛みループをカマ装置部に引掛け下糸が絡むカマ回転をし、前記の針落ち位置に臨まない下糸が絡まない上糸とでステッチ縫いすることを特徴とする間歇ステッチ縫いミシン。 The cam mechanism for the balance connected to the drive shaft at the bottom of the bed that halves the rotation from the upper shaft of the sewing machine main body, the lower balance that swings with the cam body of the cam mechanism, and 2 branched from the drive shaft A looper device part where the looper part thread hole faces the underside of the needle plate by an intermittent movement that draws an 8-shaped locus with a link mechanism of an interlocking hook for loopers with different speeds, and a half with a bobbin that is linked separately from the drive shaft A lower thread kama device unit with a rotary type kama and a driver unit and a predetermined lining feed mechanism linked to the same drive shaft are arranged, and a predetermined sewing needle mechanism with a splicing needle linked to the upper axis of the sewing machine main body is arranged at the top of the bed. A cloth feeder and presser foot are arranged, and the upper thread at the bottom of the bed is guided to the looper thread hole at the needle drop position by swinging the lower balance, and this is transferred to the upper part of the bed through the fabric with the sewing needle. bed bottom while forming a proper tension loop with a seam Return the upper thread loop by hooking the upper thread loop to the hook device part and the upper thread escape where the lower thread does not get entangled with the lower thread that does not reach the needle drop position. in the sewing machine, the cam body of the lower die balance of the cam mechanism, the first cam portion and the disk-like multi cam member and the second cam portion formed continuously to the endless cam groove loops unwinding for initial feeding of the needle thread, the second The upper thread that is fed by the downward swing of the balance by one cam part is used as the upper thread primary feed that is guided when the looper thread hole that moves for a predetermined time reaches the needle drop position, and the upper thread is moved to the upper part of the bed and a seam is added to the bed. when returning to the lower, balance is the balance on the yarn feeding mechanism in the yarn secondary feed on pulling a large upper yarn to the bed bottom and the additional downward swing at the second cam portion, additional lower swing width of the balance But from the top of the bed In the loop feeding length of needle thread guiding up also serves as sickle rotation vicinity tension against loosening due to yarn return, the slack loop loosening finished is pulled at the end of the cam portion when the hook device unit to the upper thread is applied, the An intermittent stitch stitching machine characterized in that a slack loop is hooked on a kama device and a lower thread is entangled, and stitch sewing is performed with an upper thread that does not entangle a lower thread that does not reach the needle drop position. 角縫い機構が、裏地用水平送り軸が下端に取付く二又ロッドの縫い目ダイヤルが臨む上軸の中心になる第1支点軸と、所定角縫い信号で作動する送りパルスモータの軸に連動の可動型第2支点軸を送り調節レバーの介在で連設とし、前記パルスモータの駆動で第2支点軸を第1支点軸の中心線上に変え縫い目送り量を0位に変換する請求項1記載の間歇ステッチ縫いミシン。   The corner stitching mechanism is linked to the first fulcrum shaft that is the center of the upper shaft facing the seam dial of the bifurcated rod that the horizontal feed shaft for lining is attached to the lower end, and the axis of the feed pulse motor that operates with a predetermined angle stitch signal. 2. A movable second fulcrum shaft is provided continuously through a feed adjusting lever, and the second fulcrum shaft is changed to a center line of the first fulcrum shaft by driving the pulse motor to change the stitch feed amount to zero. Interim stitch sewing machine. 上糸の糸調子が、一対の調子皿をスライド型支持軸部の前方部分に所定間隔に設け、支持軸部後部に縫着終了信号に起因し作動する糸緩め用ソレノイドを配設し、縫製終了で支持軸部を突きスライドさせ両調子皿の間隔を広げる請求項1記載の間歇ステッチ縫いミシン。   The thread tension of the upper thread is provided with a pair of tension plates at a predetermined interval in the front part of the slide-type support shaft part, and a thread loosening solenoid that operates due to a sewing end signal is provided at the rear part of the support shaft part. The intermittent stitch sewing machine according to claim 1, wherein the support shaft portion is pushed and slid at the end to widen the interval between the two tone plates. 上糸用糸巻き取付け手段が、機体下部の外方へ水平突設した短軸の中空固定支持軸に、糸巻きをセットする長軸の糸孔付き中空案内軸部を嵌め二重支持軸構成とし、前記中空固定支持軸が取付く機体下部内の支持脚部に、頂部に糸潜り用撚り止め駒が付く傾斜案内杆を起立してなる請求項1記載の間歇ステッチ縫いミシン。   The upper thread bobbin attaching means is fitted with a long shaft hollow guide shaft portion with a long shaft for setting the bobbin on the hollow fixed support shaft of the short shaft that protrudes horizontally outward from the lower part of the machine body, and has a double support shaft configuration. The intermittent stitch stitching sewing machine according to claim 1, wherein an inclined guide bar with a thread dive screwing piece attached to the top is provided upright on a support leg in a lower part of the machine body to which the hollow fixed support shaft is attached. テーブル台に載置するミシン本体の支持機構が、ミシン本体基部の片隅部に突出する支持軸を、ミシン本体の片側隅位置より該ミシン本体の重心線上側に適宜幅ずらして突設し、該支持軸を受けるテーブル台側嵌合溝部に設ける軸承部も前記支持軸のずれた位置に対向して配設することにより、ミシン本体の支持点を全体としてミシン本体重心線側へずらす重心移動型支持機構してなる請求項1記載の間歇ステッチ縫いミシン。 The support mechanism of the sewing machine main body placed on the table base is provided with a support shaft protruding from one corner of the sewing machine main body base so that the support shaft is appropriately shifted from the position of one side corner of the sewing machine body above the center of gravity line of the sewing machine main body. A center of gravity moving type in which the support point of the sewing machine main body is shifted toward the center of gravity line of the sewing machine body as a whole by disposing the bearing part provided in the fitting groove on the table base side that receives the support shaft to face the shifted position of the support shaft. intermittent stitches sewing machine according to claim 1 wherein comprising as a support mechanism.
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