JPS6245659Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） この考案は加工布支持面上において針落下点近
傍に加工布を移送するために布押え足及び送り歯
を配設するとともに、針落下点より加工布送り出
し側において加工布上面との接触回転に基づいて
その加工布に送り力を付与する送りローラを備え
たミシンにおける加工布案内装置に関するもので
ある。[Detailed description of the invention] (Industrial application field) This invention provides a work clamp foot and a feed dog in order to transfer the work cloth to the vicinity of the needle drop point on the work cloth support surface. The present invention relates to a workpiece cloth guide device for a sewing machine equipped with a feed roller that applies a feed force to the workpiece cloth based on contact rotation with the upper surface of the workpiece cloth on the workpiece cloth feeding side.

（従来の技術） 従来、この種の装置としては、加工布の形状す
なわち、カーブ部分や段部を備えた加工布に応じ
て外径の異なる複数の送りローラを用意し、その
うちの１個を加工布に応じて選択し、針落下点よ
り布送り出し側に設けた支持部材の下端にその送
りローラを回転可能に取付け、前記送りローラの
回転軸を自在継手を介して駆動源の出力軸に連結
したものがある。そして、駆動源側に設けた送り
量調節ダイヤルを回動操作することにより前記出
力軸の回転速度を変更設定して送りローラの周速
を変更するようになつていた。(Prior Art) Conventionally, this type of device has prepared a plurality of feed rollers with different outer diameters depending on the shape of the work cloth, that is, the work cloth has curved portions or stepped portions, and one of the feed rollers is A feed roller selected according to the fabric to be processed is rotatably attached to the lower end of a support member provided on the fabric feed side from the needle drop point, and the rotating shaft of the feed roller is connected to the output shaft of the drive source via a universal joint. There are things that are connected. By rotating a feed amount adjustment dial provided on the drive source side, the rotational speed of the output shaft is changed and set, thereby changing the circumferential speed of the feed roller.

（考案が解決しようとする問題点） ところが、上述した従来の装置においては、加
工布に応じて送りローラを交換するたびに周速が
変更されるため、加工布の種類にかかわらず送り
量を一定に設定しておくためには、送りローラを
交換するたびに調節ダイヤルを回動操作して送り
量を調節するという面倒な操作が必要であつた。
さらに、前記送り量調節ダイヤルには使用される
各送りローラに応じて複数の目盛が同心円上に刻
設されているため、目盛合わせの操作が面倒であ
つた。(Problem to be solved by the invention) However, in the conventional device described above, the peripheral speed is changed each time the feed roller is replaced depending on the workpiece cloth, so it is difficult to adjust the feed amount regardless of the type of workpiece cloth. In order to keep the feed amount constant, it was necessary to perform the troublesome operation of rotating an adjustment dial to adjust the feed amount each time the feed roller was replaced.
Furthermore, since a plurality of scales are concentrically carved on the feed amount adjustment dial according to each feed roller used, it is troublesome to adjust the scales.

考案の構成 （問題点を解決するための手段） 上記の問題点を解消するためにこの考案におい
ては、加工布支持面７上において加工布Ｗを移送
するための布押え足４及び送り歯を針落下点近傍
に配設し、針落下点より加工布送り出し側には支
持部材１９を配設し、駆動源に連結された駆動ギ
ア３２又は３３を前記支持部材１９上にて布送り
方向と直交する方向に延びる一軸線の周りで回転
可能に支持し、前記駆動ギア３２又は３３に噛合
う被動ギア４３又は４４を前記駆動ギア３２又は
３３の回転軸線に対し平行に延びかつ所定の距離
を隔てた軸線上において前記支持部材１９上に回
転可能に支持し、前記加工布Ｗ上面との接触回転
に基づいてその加工布Ｗに送り力を付与する送り
ローラ４１又は４２を前記被動ギア４３又は４４
と同一軸線上において前記支持部材１９上に被動
ギア４３又は４４と一体回転可能に支持し、前記
送りローラ４１又は４２を前記支持部材１９に対
して交換可能に取付けるとともに、その交換に際
しても前記送りローラ４１及び４２の周速がほぼ
一定となるように前記各ギア３２，３３，４３，
４４のギア比を選定している。Structure of the invention (means for solving the problem) In order to solve the above problem, this invention has a presser foot 4 and a feed dog for transporting the work cloth W on the work cloth support surface 7. A support member 19 is disposed near the needle drop point and on the work cloth feed side from the needle drop point, and a drive gear 32 or 33 connected to a drive source is mounted on the support member 19 in the cloth feed direction. A driven gear 43 or 44 that is rotatably supported around one axis extending in an orthogonal direction and that meshes with the drive gear 32 or 33 extends parallel to the rotational axis of the drive gear 32 or 33 and extends a predetermined distance. The driven gear 43 or the feed roller 41 or 42 is rotatably supported on the supporting member 19 on a separate axis and applies a feeding force to the work cloth W based on contact rotation with the upper surface of the work cloth W. 44
The feed roller 41 or 42 is supported on the support member 19 so as to be rotatable integrally with the driven gear 43 or 44 on the same axis as the support member 19, and the feed roller 41 or 42 is attached to the support member 19 so as to be replaceable. Each of the gears 32, 33, 43,
44 gear ratios are selected.

（作用） 上記の構成によりこの考案においては、送りロ
ーラ４１を別の送りローラ４２に交換しても、そ
の周速がほぼ一定に保たれるため、送り量調節ダ
イヤルを調節する手間を省くことができ、そのた
めその送り量調節ダイヤルには１つの目盛を設け
るだけでよい。(Function) With the above configuration, in this invention, even if the feed roller 41 is replaced with another feed roller 42, its circumferential speed is kept almost constant, thereby eliminating the need to adjust the feed amount adjustment dial. Therefore, only one scale needs to be provided on the feed amount adjustment dial.

（実施例） 以下、この考案を具体化したミシンの一実施例
を図面に従つて説明する。(Example) An example of a sewing machine embodying this invention will be described below with reference to the drawings.

第１図に示すように、ミシンフレーム１のアー
ム部１ａには下端に針２を有する針棒３がミシン
主軸に連動して上下動可能に支持され、ミシンフ
レーム１のベツド部１ｂ内に設けられた糸輪捕捉
器（図示しない）との協働により、加工布Ｗに縫
目を形成するようになつている。又、前記アーム
部１ａには下端に布押え足４を有する押え棒５が
上下動可能に支持され、ミシンフレーム１の布送
り出し側側面、すなわち背面に回動可能に支持さ
れた押え上げレバー６の回動操作に基づき、その
布押え足４が前記ベツド部１ｂ上面の加工布支持
面７上に位置する使用位置とその加工布支持面７
から離間する上方の不使用位置との間で上下動さ
れる。この布押え足４と対応して前記ベツド部１
ｂ内には布押え足４との協働により加工布Ｗを後
方へ移送するための送り歯（図示しない）が設け
られている。 As shown in FIG. 1, a needle bar 3 having a needle 2 at its lower end is supported on an arm portion 1a of a sewing machine frame 1 so as to be movable up and down in conjunction with the main shaft of the sewing machine. A stitch is formed on the work cloth W by cooperation with a thread loop catcher (not shown). Further, a presser foot 5 having a presser foot 4 at its lower end is supported on the arm portion 1a so as to be movable up and down, and a presser foot lifting lever 6 is rotatably supported on the side surface of the sewing machine frame 1 on the cloth feed side, that is, the back surface. Based on the rotational operation of
It is moved up and down between a non-use position and an upper position away from the main body. The bed portion 1 corresponds to this presser foot 4.
A feed dog (not shown) is provided in b for transporting the workpiece cloth W backward in cooperation with the presser foot 4.

第１図〜第３図及び第５図に示すように、アー
ム部１ａの背面には中空状をなすとともに、下
面、左右両側面及びアーム部側側面において開口
する第１支持部材８が配設され、そのアーム部側
側面には上下に延びる長孔９ａをそれぞれ備えた
３個の取付片９が一体形成されている。そして、
各長孔９ａを貫通してアーム部１ａに螺着される
ねじ１０により前記第１支持部材８がアーム部１
ａに上下位置調節可能に取付けられている。 As shown in FIGS. 1 to 3 and 5, a first support member 8 is provided on the back surface of the arm portion 1a, which is hollow and has openings on the lower surface, both left and right side surfaces, and the side surface of the arm portion. Three mounting pieces 9 each having an elongated hole 9a extending vertically are integrally formed on the side surface of the arm portion. and,
The first support member 8 is attached to the arm portion 1 by a screw 10 that passes through each elongated hole 9a and is screwed onto the arm portion 1a.
It is attached to a so that its vertical position can be adjusted.

前記第１支持部材８の上部内面及び下部支持片
８ａには断面Ｌ字状をなして布送り方向（前後方
向）に延びる摺動面１１がそれぞれ形成されると
ともに、前端にて開口し、第１支持部材８ａの中
空部に連通する摺動溝８ｂが形成されている。そ
して、第１支持部材８の中空部内には側面ほぼコ
字状をなす第２支持部材１２が前記各摺動面１１
に沿つて布送り方向へ摺動可能に支持されてい
る。又、前記第１支持部材８の上部には段差部１
３ａを備え、かつ布送り方向に延びる長孔１３が
形成されている。そして、その長孔１３を貫通し
て前記第２支持部材１２の上辺部に螺着される一
対のねじ１４により前記第２支持部材１２が布送
り方向に沿つて摺動調節された任意の位置に固定
されるようになつている。第２支持部材１２の上
面には第１支持部材８の摺動溝８ｂを貫通して上
方へ突出する筒状部１５が形成されるとともに、
第２支持部材１２の上下両辺部間には上下に延び
る支軸１６が固定されている。 The upper inner surface and lower support piece 8a of the first support member 8 are each formed with a sliding surface 11 having an L-shaped cross section and extending in the cloth feeding direction (back and forth direction). A sliding groove 8b communicating with the hollow portion of the first support member 8a is formed. In the hollow portion of the first support member 8, a second support member 12 having a substantially U-shaped side surface is provided on each of the sliding surfaces 11.
It is supported so as to be slidable in the cloth feeding direction along. Further, a stepped portion 1 is provided on the upper part of the first support member 8.
3a and an elongated hole 13 extending in the cloth feeding direction is formed. Then, the second support member 12 is slidably adjusted to an arbitrary position along the cloth feeding direction by a pair of screws 14 that pass through the elongated hole 13 and are screwed onto the upper side of the second support member 12. It is becoming fixed. A cylindrical portion 15 is formed on the upper surface of the second support member 12 and projects upwardly through the sliding groove 8b of the first support member 8.
A support shaft 16 extending vertically is fixed between the upper and lower sides of the second support member 12 .

前記第２支持部材１２の支軸１６にはブロツク
状の支持体１７と、その支持体１７から下部前方
の布押え足４へ向かつて延出する腕部１８とを備
えた第３支持部材１９が前記支持体１７において
上下動可能に及び回動可能に支持されている。 A third support member 19 is provided on the support shaft 16 of the second support member 12, and includes a block-shaped support 17 and an arm portion 18 extending from the support 17 toward the presser foot 4 at the front of the lower part. is supported on the support body 17 so as to be movable up and down and rotatable.

第６図に示すように、前記第１支持部材８の長
孔１３の下方において前記支持体１７上にはブロ
ツク状の調節体２０がその段差付長孔２０を貫通
して前記支持体１７に螺着される一対のねじ２１
により相対位置調節可能に取付けられている。こ
の調節体２０に近接して前記第２支持部材１２に
は上下に延びる案内孔２２が形成されるととも
に、前記調節体２０の一側面にはその案内孔２２
に係合する係合片２３が一体に突出形成されてい
る。又、前記調節体２０の上部右側面には前後に
延びる突条２０ｂが形成されている。そして、前
記各ねじ２１を緩めた状態においては、第３支持
部材１９を支軸１６のまわりで回動位置調節する
ことができ、一方、第３支持部材１９の支持体１
７に対し、調節体２０を所要の調節位置に固定し
た状態においては、係合片２３と案内孔２２との
係合に基づき、支軸１６を中心とする第３支持体
１９の回動が規制され、その状態で前記案内孔２
２及び支軸１６に沿つて、調節体２０及び第３支
持部材１９を上下動し得るようになつている。 As shown in FIG. 6, a block-shaped adjustment body 20 is placed on the support body 17 below the long hole 13 of the first support member 8, and is inserted into the support body 17 by passing through the stepped long hole 20. A pair of screws 21 to be screwed
It is mounted so that its relative position can be adjusted. A guide hole 22 extending vertically is formed in the second support member 12 adjacent to the adjustment body 20, and the guide hole 22 is formed on one side of the adjustment body 20.
An engaging piece 23 that engages with is integrally formed to protrude. Further, a protrusion 20b extending back and forth is formed on the upper right side surface of the adjustment body 20. When each of the screws 21 is loosened, the rotational position of the third support member 19 can be adjusted around the support shaft 16, while the support body 1 of the third support member 19
In contrast to 7, when the adjustment body 20 is fixed at a required adjustment position, the third support 19 cannot rotate about the support shaft 16 based on the engagement between the engagement piece 23 and the guide hole 22. regulated, and in that state the guide hole 2
2 and the support shaft 16, the adjustment body 20 and the third support member 19 can be moved up and down.

第１図及び第５〜７図に示すように、前記第３
支持部材１９の支持体１７及び腕部１８には布送
り方向とほぼ直交する方向（左右方向）に延びる
回転軸２４，２５が軸受２４ａ，２５ａを介して
それぞれ回転可能に支持され、各回転軸２４，２
５の一端に取付けられた歯付きプーリ２６，２７
の間にはタイミングベルト２８が掛装されてい
る。 As shown in FIG. 1 and FIGS. 5 to 7, the third
Rotating shafts 24 and 25 extending in a direction (horizontal direction) substantially orthogonal to the cloth feeding direction are rotatably supported on the support 17 and arm portion 18 of the supporting member 19 via bearings 24a and 25a, respectively. 24,2
Toothed pulleys 26, 27 attached to one end of 5
A timing belt 28 is hung between them.

一方、第４図に示すように、アーム部１ａの右
側部後面にはミシンプーリ１ｃの回転運動を前記
上方の回転軸２４に伝達するための周知の駆動伝
達機構Ａが設けられ、その駆動伝達機構Ａから出
力される間欠回転運動が一対の自在継手３０及び
連結軸２９を介して上方の回転軸２４に伝達され
る。そして、前記間欠回転運動が上方の回転軸２
４、歯付きプーリ２６、タイミングベルト２８及
び下方の歯付きプーリ２７を介して下方の回転軸
２４に伝達され、その回転軸２４が前述した送り
歯と同期して所定方向へ間欠回転されるようにな
つている。又、前記各歯付きプーリ２６，２７及
びベルト２８はカバー体３１によつて覆われてい
る。さらに、前記駆動伝達機構Ａの上部には上方
の回転軸２４の回転数を変更設定するための１個
の円形目盛を備えた送り量調節ダイアルＤが配設
されている。 On the other hand, as shown in FIG. 4, a well-known drive transmission mechanism A for transmitting the rotational movement of the sewing machine pulley 1c to the upper rotating shaft 24 is provided on the rear surface of the right side of the arm portion 1a. The intermittent rotational motion output from A is transmitted to the upper rotating shaft 24 via the pair of universal joints 30 and the connecting shaft 29. Then, the intermittent rotational movement is caused by the upper rotating shaft 2.
4. Transmitted to the lower rotating shaft 24 via the toothed pulley 26, the timing belt 28, and the lower toothed pulley 27, so that the rotating shaft 24 is intermittently rotated in a predetermined direction in synchronization with the aforementioned feed dog. It's getting old. Further, each of the toothed pulleys 26 and 27 and the belt 28 are covered by a cover body 31. Furthermore, a feed rate adjustment dial D is provided at the top of the drive transmission mechanism A and is provided with a single circular scale for changing and setting the rotational speed of the upper rotating shaft 24.

前記下方の回転軸２５の左端にはそれぞれ歯数
の異なる第１駆動ギヤ３２及び第２駆動ギヤ３３
が一対のねじ３４により交換可能に取付けられ
る。又、前記腕部１８の下端には前記各ギヤ３
２，３３に対応して第１ブラケツト３５及び第２
ブラケツト３６が交換可能に取付けられる。すな
わち、各ブラケツト３５，３６は断面ほぼＬ字状
をなす取付部３７と二叉状の軸支部３８とから構
成されていて、各取付部３７において３個のねじ
３９により前記腕部１８下端に取付けられる。各
ブラケツト３５，３６の軸支部３８には前記回転
軸２５に対して所定の距離を隔てて平行に延びる
支軸４０が挿通支持されている。各ブラケツト３
５，３６の支軸４０には外径の異なる第１送りロ
ーラ４１及び第２送りローラ４２がそれぞれ回転
可能に支持され、各送りローラ４１，４２の右側
面には前記第１駆動ギヤ３２及び第２駆動ギヤ３
３にそれぞれ噛合可能な第１被動ギヤ４３及び第
２被動ギヤ４４がそれぞれ一体形成されている。 A first drive gear 32 and a second drive gear 33 each having a different number of teeth are disposed at the left end of the lower rotating shaft 25.
is replaceably attached by a pair of screws 34. Further, each of the gears 3 is attached to the lower end of the arm portion 18.
2 and 33, the first bracket 35 and the second bracket
A bracket 36 is replaceably mounted. That is, each of the brackets 35 and 36 is composed of a mounting part 37 having a substantially L-shaped cross section and a bifurcated shaft support 38, and each mounting part 37 is connected to the lower end of the arm part 18 by three screws 39. Installed. A support shaft 40 extending parallel to the rotating shaft 25 at a predetermined distance is inserted through and supported by the shaft support 38 of each bracket 35, 36. Each bracket 3
A first feed roller 41 and a second feed roller 42 having different outer diameters are rotatably supported on the support shafts 40 of 5 and 36, respectively, and the first drive gear 32 and the second feed roller 42 are mounted on the right side of each feed roller 41 and 42, respectively. 2nd drive gear 3
A first driven gear 43 and a second driven gear 44 which can mesh with each other are integrally formed with each other.

そして、第１駆動ギヤ３２を回転軸２５に取付
けた状態において第１ブラケツト３５を第３支持
部材１９の腕部１８に取付けたときには、回転軸
２５の回転運動が第１駆動ギヤ３２に噛合う第１
被動ギヤ４３を介して第１送りローラ４１に伝達
され、その第１送りローラ４１が布送り方向へ間
欠回転される。又、前記回転軸２５に第２駆動ギ
ヤ３３を取付けた状態で第２ブラケツト３６が前
記腕部１８に取付られた状態においては、回転軸
２５の回転運動が前記第２駆動ギヤ３３に噛合う
第２被動ギヤ４４を介して第２送りローラ４２に
伝達される。なお、この実施例においては、各送
りローラ４１，４２の周速がほぼ一定となるよう
に各ギヤ３２，３３，４３，４４のギヤ比（速度
比）が選定されている。又、前記各被動ギヤ４
３，４４は各軸支部３８近傍に取付けられるカバ
ー４５によつて被覆されている。 When the first bracket 35 is attached to the arm portion 18 of the third support member 19 with the first drive gear 32 attached to the rotation shaft 25, the rotational movement of the rotation shaft 25 meshes with the first drive gear 32. 1st
It is transmitted to the first feed roller 41 via the driven gear 43, and the first feed roller 41 is intermittently rotated in the cloth feeding direction. Further, when the second bracket 36 is attached to the arm portion 18 with the second drive gear 33 attached to the rotation shaft 25, the rotational movement of the rotation shaft 25 meshes with the second drive gear 33. It is transmitted to the second feed roller 42 via the second driven gear 44 . In this embodiment, the gear ratio (speed ratio) of each gear 32, 33, 43, 44 is selected so that the peripheral speed of each feed roller 41, 42 is approximately constant. Moreover, each of the driven gears 4
3 and 44 are covered by a cover 45 attached near each shaft support 38.

第５図に示すように第３支持部材１９の支持体
１７上面には軸受２４ａに連通し上下に延びる段
付き孔４６が形成され、その下部には潤滑油が含
浸されたフエルト４７が収容されている。一方、
第２支持部材１２の筒状部１５にねじ筒４８が上
下動可能に螺合され、そのねじ筒４８内には押圧
棒４９が上下動可能に支持されている。そして、
この押圧棒４９の下端が前記段付き孔４６の段部
に係合されている。又、この押圧棒４９にはばね
５０が巻回され、そのばね５０により押圧棒４９
を介して第３支持部材１９が下方へ移動付勢され
ている。そして、前記ねじ筒４８の回動操作に基
づきばね５０の圧力が変更調節され、所定の調節
位置にてねじ筒４８外周のロツクリング５１を締
付けることにより、ねじ筒４８を所定の調節位置
に固定できるようになつている。 As shown in FIG. 5, a stepped hole 46 communicating with the bearing 24a and extending vertically is formed on the upper surface of the support 17 of the third support member 19, and a felt 47 impregnated with lubricating oil is accommodated in the lower part of the stepped hole 46. ing. on the other hand,
A threaded tube 48 is screwed into the cylindrical portion 15 of the second support member 12 so as to be movable up and down, and a press rod 49 is supported within the screw tube 48 so as to be movable up and down. and,
The lower end of this pressing rod 49 is engaged with the stepped portion of the stepped hole 46 . Further, a spring 50 is wound around this press rod 49, and the spring 50 causes the press rod 49 to
The third support member 19 is urged to move downward. Then, the pressure of the spring 50 is changed and adjusted based on the rotation operation of the threaded barrel 48, and by tightening the lock ring 51 on the outer periphery of the threaded barrel 48 at a predetermined adjustment position, the threaded barrel 48 can be fixed at a predetermined adjustment position. It's becoming like that.

第３図に示すように第１支持部材８の右側面に
は回動レバー５２がその中間部にて段付きねじ５
３により回動可能に支持され、その前端に形成さ
れた突起５４が第１支持部材８を貫通して前記調
節体２０の突条２０ｂの下面に位置している。一
方、第１，２図に示すように、前記第１支持部材
８の後部には左右に延びる支軸５５が回動可能に
支持され、その左端（第２図において右端）には
操作レバー５６が固着されるとともに、右端（第
２図において左端）には前記回動レバー５２の後
端に係合し得るカム片５７が取付けられている。
そして、操作レバー５６が第１図に示す位置に配
置された状態においては、第３図に示すカム片５
７が回動レバー５２の後端から離間し、回動レバ
ー５２の前端の下方移動が許容されるため、第５
図に示すばね５０の付勢力に基づき第３支持部材
１９が下方移動され、その第３支持部材１９下端
の第１送りローラ４１あるいは第２送りローラ４
２が加工布Ｗ上面に圧接される。 As shown in FIG. 3, on the right side of the first support member 8, a rotating lever 52 is provided with a stepped screw 5 at its intermediate portion.
3, and a protrusion 54 formed at the front end thereof passes through the first support member 8 and is located on the lower surface of the protrusion 20b of the adjustment body 20. On the other hand, as shown in FIGS. 1 and 2, a support shaft 55 extending left and right is rotatably supported at the rear of the first support member 8, and an operating lever 56 is attached to the left end (right end in FIG. 2) of the support shaft 55. is fixed thereto, and a cam piece 57 that can engage with the rear end of the rotating lever 52 is attached to the right end (left end in FIG. 2).
When the operating lever 56 is placed in the position shown in FIG. 1, the cam piece 56 shown in FIG.
7 is separated from the rear end of the rotary lever 52, and the front end of the rotary lever 52 is allowed to move downward.
The third support member 19 is moved downward based on the urging force of the spring 50 shown in the figure, and the first feed roller 41 or the second feed roller 4 at the lower end of the third support member 19 is moved downward.
2 is pressed against the upper surface of the work cloth W.

又、前記操作レバー５６が第１図の時計方向へ
回動操作されたときにはカム片５７が回動レバー
５２の後端上面に係合し、それに伴い回動レバー
５２の前端が上方へ移動され、突起５４と調節体
２０の突条２０ｂとの係合を介して第３支持部材
１９とともに第１送りローラ４１あるいは第２送
りローラ４２が上方の不使用位置まで移動され
る。そして、前記カム片５７との係合に基づき、
第３支持部材１９が上方の不使用位置に配置保持
される。 Further, when the operating lever 56 is rotated clockwise in FIG. 1, the cam piece 57 engages with the upper surface of the rear end of the rotary lever 52, and the front end of the rotary lever 52 is accordingly moved upward. Through the engagement between the protrusion 54 and the protrusion 20b of the adjustment body 20, the first feed roller 41 or the second feed roller 42 is moved together with the third support member 19 to an upper position where it is not used. Based on the engagement with the cam piece 57,
The third support member 19 is arranged and held in an upper unused position.

又、前記押え棒５の下端部近傍には係合片５８
が設けられるとともに、第３支持部材１９の腕部
１８には前記係合片５８の上方まで延びる連係片
５９が取付けられている。そして、前記押え上げ
レバー６の回動操作に基づき、押え棒５とともに
押え足４が上動されたときには前記係合片５８が
連係片５９に下方から係合し、第３支持部材１９
が上方の不使用位置一体的に移動されるようにな
つている。 Further, an engaging piece 58 is provided near the lower end of the presser bar 5.
A linking piece 59 extending above the engaging piece 58 is attached to the arm portion 18 of the third support member 19 . Then, when the presser foot 4 is moved upward together with the presser foot bar 5 based on the rotational operation of the presser foot lifting lever 6, the engaging piece 58 engages with the linking piece 59 from below, and the third support member 19
are integrally moved to an upper unused position.

次に、上記のように構成されたミシンの作用を
説明する。さて、第１図は第３支持部材１９の腕
部１８下端に第１ブラケツト３５が取付けられる
とともに、第３支持部材１９が下方の使用位置に
配置され、第１送りローラ４１が加工布支持面７
上の加工布Ｗ上面に接触した状態を示すものであ
る。この状態においては、ねじ筒４８及びロツク
リング５１の回動操作に基づいて予め設定された
ばね５０のばね力により前記第１送りローラ４１
が加工布Ｗ上面に押し付けられている。 Next, the operation of the sewing machine configured as described above will be explained. Now, in FIG. 1, the first bracket 35 is attached to the lower end of the arm portion 18 of the third support member 19, the third support member 19 is placed in the lower use position, and the first feed roller 41 is moved to the work cloth support surface. 7
It shows the state in which it is in contact with the upper surface of the upper work cloth W. In this state, the first feed roller 41 is moved by the spring force of the spring 50 set in advance based on the rotation operation of the threaded cylinder 48 and the lock ring 51.
is pressed against the upper surface of the work cloth W.

この状態でミシンを運転すると、送り歯（図示
しない）に送り運動が付与されるとともに、その
送り歯と同期して動力伝達機構Ａからの動力によ
り第１送りローラ４１が布送り方向に間欠回転さ
れる。従つて、布押え足４、送り歯及び第１送り
ローラ４１の協働により加工布Ｗを円滑に移送す
ることができる。 When the sewing machine is operated in this state, a feed motion is applied to the feed dog (not shown), and the first feed roller 41 is intermittently rotated in the cloth feeding direction by the power from the power transmission mechanism A in synchronization with the feed dog. be done. Therefore, the workpiece cloth W can be smoothly transferred by the cooperation of the presser foot 4, the feed dog, and the first feed roller 41.

次に、第１図に実線で示す布押え足４を同図に
鎖線で示す布押え足４に交換し、それに伴つて、
布押え足４との干渉をさけるために、第１送りロ
ーラ４１の配置位置を調整する操作について説明
する。まず、押え上げレバー６を所定方向へ回動
操作すると、布押え足４が第１図に示す使用位置
から上方の不使用位置まで移動される間に、係合
片５８が連係片５９の先端部に下方から係合し、
それにより布押え足４とともに第３支持部材１９
がばね５０の付勢力に抗して第１図に使用位置か
ら上方の不使用位置まで上昇される。従つて、布
押え足４及び第１送りローラ４１が加工布Ｗから
上方へ離間する。 Next, the presser foot 4 shown in solid lines in FIG. 1 is replaced with the presser foot 4 shown in chain lines in the same figure, and along with this,
An operation for adjusting the arrangement position of the first feed roller 41 in order to avoid interference with the presser foot 4 will be described. First, when the presser foot lifting lever 6 is rotated in a predetermined direction, the engaging piece 58 is moved from the tip of the linking piece 59 while the presser foot 4 is moved from the used position shown in FIG. 1 to the upper non-used position. from below,
As a result, the third support member 19 together with the presser foot 4
is raised against the biasing force of the spring 50 from the used position to the upper non-used position as shown in FIG. Therefore, the presser foot 4 and the first feed roller 41 are separated upward from the work cloth W.

この状態で、第１図に実線で示す布押え足４を
同図に鎖線で示す布押え足４に交換した後、第１
支持部材８上の２個のねじ１４を緩めて、第３支
持部材１９及び第１送りローラ４１とともに第２
支持部材１２を各摺動面１１に沿つて後方へ移動
させ、所要の移動位置で前記各ねじ１４を締付け
て第２支持部材１２を第１支持部材８に固定す
る。その後、前記押え上げレバー６を往復回動さ
せれば、交換された布押え足４と位置調整された
第２支持部材１２上の第１送りローラ４１とが一
体的に下方移動され、布押え足４及び第１送りロ
ーラ４１が加工布Ｗ上面に圧接される。 In this state, after replacing the presser foot 4 shown in solid lines in FIG. 1 with the presser foot 4 shown in chain lines in the same figure,
By loosening the two screws 14 on the support member 8, the second
The support member 12 is moved rearward along each sliding surface 11, and each screw 14 is tightened at a required movement position to fix the second support member 12 to the first support member 8. Thereafter, when the presser foot lifting lever 6 is rotated back and forth, the replaced presser foot 4 and the first feed roller 41 on the second support member 12 whose position has been adjusted are integrally moved downward, and the presser foot The legs 4 and the first feed roller 41 are pressed against the upper surface of the work cloth W.

そして、この場合、第３支持部材１９は第２支
持部材１２とともに、固定位置にある第１支持部
材８の摺動面１１及び摺動溝８ｂに沿つて後方へ
移動されるだけであるため、その第３支持部材１
９の第１送りローラ４１の回転軸線がその移動操
作前後において変更されることはなく、従来例と
は異なり、面倒な微調整を行う必要がない。 In this case, the third support member 19 is simply moved backward along the sliding surface 11 and the sliding groove 8b of the first support member 8 in the fixed position, together with the second support member 12. The third support member 1
The axis of rotation of the first feed roller 41 of No. 9 is not changed before and after its movement operation, and unlike the conventional example, there is no need to perform troublesome fine adjustments.

上記のように小径の第１送りローラ４１が装着
されている場合には、その第１送りローラ４１を
布押え足４の後部に近接して配置することができ
るので、加工布Ｗのカーブ部分に沿つて縫目を形
成する場合などに特に有効に作用する。 When the small-diameter first feed roller 41 is installed as described above, the first feed roller 41 can be placed close to the rear part of the presser foot 4, so that the curved portion of the workpiece cloth W can be This is particularly effective when forming a seam along a seam.

一方、段差部を有する加工布Ｗに縫目を形成す
る場合にはその段差部を乗越えやすくするために
送りローラの径を大きくすることが望ましい。そ
こで、第６図に示す小径の第１送りローラ４１を
大径の第２送りローラ４２に交換する操作につい
て次に説明する。まず、押え上げレバー６を所定
方向へ回動操作して前述した布押え***換時と同
様に第３支持部材１９とともに第１送りローラ４
１を上方の不使用位置に配置する。次に、前記と
同様に、第１支持部材８上の２個のねじ１４を緩
めて、第３支持部材１９とともに第２支持部材１
２を各摺動面１１及び摺動溝８ｂに沿つて後方へ
移動させ、所要の移動位置で前記各ねじ１４を締
付けて第２支持部材１２を第１支持部材１８に固
定する。 On the other hand, when forming a seam on the work cloth W having a stepped portion, it is desirable to increase the diameter of the feed roller in order to make it easier to get over the stepped portion. Therefore, the operation of replacing the small-diameter first feed roller 41 shown in FIG. 6 with the large-diameter second feed roller 42 will be described next. First, the presser foot lifting lever 6 is rotated in a predetermined direction, and the third support member 19 and the first feed roller 4 are
1 is placed in the upper unused position. Next, in the same manner as above, loosen the two screws 14 on the first support member 8, and remove the second support member 1 along with the third support member 19.
2 is moved rearward along each sliding surface 11 and sliding groove 8b, and each screw 14 is tightened at a required movement position to fix the second support member 12 to the first support member 18.

この状態で、３個のねじ３９を緩めて第１ブラ
ケツト３５とともに第１送りローラ４１を第３支
持部材１９から取外し、次に２個のねじ３４を緩
めて第１駆動ギヤ３２を下方の回転軸２５から取
外す。その後、第６図に示す小径の第２駆動ギヤ
３３を前記回転軸２５に挿通して２個のねじ３４
により固定し、引続き、第７図に示す第２ブラケ
ツト３６を３個のねじ３９により第３支持部材１
９に固定する。この第２ブラケツト３６の装着と
同時に、第２被動ギヤ４４が第２駆動ギヤ３３に
噛合わされる。 In this state, loosen the three screws 39 to remove the first feed roller 41 together with the first bracket 35 from the third support member 19, then loosen the two screws 34 to rotate the first drive gear 32 downward. Remove from shaft 25. Thereafter, the small diameter second drive gear 33 shown in FIG. 6 is inserted into the rotating shaft 25, and the two screws 34 are inserted.
Then, the second bracket 36 shown in FIG.
Fixed at 9. At the same time as the second bracket 36 is attached, the second driven gear 44 is meshed with the second drive gear 33.

次に、前記押え上げレバー６を復帰回動させれ
ば、布押え足４と第３支持部材１９とが一体的に
下方移動され、布押え足４及び第２送りローラ４
２が加工布支持面７上の加工布Ｗ上面に圧接され
る。この状態でミシンを運転すれば、前記小径の
第１送りローラ４１とほぼ同じ周速で第２送りロ
ーラ４２が間欠的に回転され、その第２送りロー
ラ４２と送り歯及び布押え足４との協働により段
部を備えた加工布Ｗを円滑に移送することができ
る。 Next, when the presser foot lifting lever 6 is rotated to return, the presser foot 4 and the third support member 19 are integrally moved downward, and the presser foot 4 and the second feed roller 4 are moved downward.
2 is pressed against the upper surface of the work cloth W on the work cloth support surface 7. When the sewing machine is operated in this state, the second feed roller 42 is intermittently rotated at approximately the same circumferential speed as the small-diameter first feed roller 41, and the second feed roller 42, the feed dog, and the presser foot 4 are rotated intermittently. By this cooperation, the work cloth W having the stepped portion can be smoothly transferred.

なお、この実施例においては、操作レバー５６
を回動操作することにより、布押え足４とは関係
なく、第３支持部材１９上の送りローラ４１，４
２を上方の不使用位置に配置することができ、そ
の状態で送りローラ４１，４２等の交換作業を行
うことができる。 Note that in this embodiment, the operating lever 56
By rotating the feed rollers 41 and 4 on the third support member 19, regardless of the presser foot 4,
2 can be placed in an upper unused position, and the feed rollers 41, 42, etc. can be replaced in this state.

又、この実施例においては、第３支持部材１９
を第２支持部材１２に対して回動位置調節可能に
支持したので組付け誤差などに起因して送りロー
ラ４１の回転軸線が布送り方向と直交していない
場合に、第３支持部材１９に対する調節体２０の
取付位置を調節することによつて、回転軸線の位
置調節を容易に行うことができる。 Further, in this embodiment, the third support member 19
is supported with respect to the second support member 12 so that its rotational position can be adjusted, so that if the rotation axis of the feed roller 41 is not perpendicular to the cloth feeding direction due to an assembly error or the like, the By adjusting the mounting position of the adjusting body 20, the position of the rotation axis can be easily adjusted.

上記のように、この実施例において、送りロー
ラを交換する際に、その送りローラ４１，４２の
外径に応じて第３支持部材１９とともに第２支持
部材１２を布送り方向に延びる摺動面１１に沿つ
て前後に移動調節することができるので、ローラ
交換後においてその回転軸線が布送り軸方向と直
交する方向からずれるおそれを未然に防止するこ
とができる。 As described above, in this embodiment, when replacing the feed rollers, depending on the outer diameter of the feed rollers 41 and 42, the third support member 19 and the second support member 12 are moved along the sliding surface extending in the cloth feeding direction. Since it is possible to adjust the movement back and forth along 11, it is possible to prevent the rotational axis from being deviated from the direction perpendicular to the cloth feeding axis direction after the roller is replaced.

さらに、ローラ交換後においても、送りローラ
の周速が変化することはないので、送り量調節ダ
イアルＤにより送り量の微調整を行う必要がな
く、そのため送り量調節ダイアルＤには各送りロ
ーラに対応して複数の目盛を設ける必要がない。 Furthermore, even after roller replacement, the circumferential speed of the feed roller does not change, so there is no need to make fine adjustments to the feed amount using the feed amount adjustment dial D. There is no need to provide multiple scales correspondingly.

考案の効果 以上詳述したようにこの考案は、各送りローラ
を支持部材に対して交換可能に取付けるととも
に、その交換に際しても前記送りローラの周速が
ほぼ一定となるように各ギヤのギヤ比を選定した
ので、送りローラの交換後において送り量調節ダ
イヤルにより送り量を調節するという面倒な操作
を行う必要がなく、そのために、前記ダイヤルに
送りローラに応じて複数の目盛を設ける必要がな
いという優れた効果を奏する。Effects of the invention As detailed above, this invention attaches each feed roller to the support member so that it can be replaced, and also adjusts the gear ratio of each gear so that the circumferential speed of the feed roller remains approximately constant even when the feed roller is replaced. Since we selected , there is no need to perform the troublesome operation of adjusting the feed amount using the feed amount adjustment dial after replacing the feed roller, and therefore there is no need to provide multiple scales on the dial depending on the feed roller. It has this excellent effect.

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

第１図はこの考案を具体化したミシンの左側面
図、第２図は背面図、第３図は送りローラの支持
構造を示す正面図、第４図は駆動伝達機構を示す
背面図、第５図は第２図における−線断面
図、第６図は第２図における−線断面図、第
７図は部分分解斜視図である。 図において、７は加工布支持面、１９は支持部
材、３２，３３は駆動ギヤ、４１，４２は送りロ
ーラ、４３，４４は被動ギヤ、Ｗは加工布であ
る。 Figure 1 is a left side view of a sewing machine embodying this invention, Figure 2 is a rear view, Figure 3 is a front view showing the support structure for the feed roller, Figure 4 is a rear view showing the drive transmission mechanism, 5 is a cross-sectional view taken along the line -- in FIG. 2, FIG. 6 is a cross-sectional view taken along the line -- in FIG. 2, and FIG. 7 is a partially exploded perspective view. In the figure, 7 is a work cloth support surface, 19 is a support member, 32 and 33 are drive gears, 41 and 42 are feed rollers, 43 and 44 are driven gears, and W is a work cloth.

Claims (1)

【実用新案登録請求の範囲】 針落下点近傍に配設され、加工布支持面７上に
おいて加工布Ｗを移送するための布押え足４及び
送り歯と、 針落下点より加工布送り出し側に配設された支
持部材１９と、 その支持部材１９上にて布送り方向と直交する
方向に延びる一軸線の回りで回転可能に支持さ
れ、駆動源に連結された駆動ギア３２又は３３
と、 その駆動ギア３２又は３３の回転軸線に対し平
行に延びかつ所定の距離を隔てた軸線上において
前記支持部材１９上に回転可能に支持され、前記
駆動ギア３２又は３３に噛合う被動ギア４３又は
４４と、 前記被動ギア４３又は４４と同一軸線上におい
て前記支持部材１９上に被動ギア４３又は４４と
一体回転可能に支持され、前記加工布Ｗ上面との
接触回転に基づいてその加工布Ｗに送り力を付与
する送りローラ４１又は４２と を備え、前記各送りローラ４１又は４２を前記支
持部材１９に対して交換可能に取付けるととも
に、その交換に際しても前記送りローラ４１，４
２の周速がほぼ一定となるように前記各ギア３
２，３３，４３，４４のギア比が選定されるよう
に構成したことを特徴とするミシンにおける加工
布案内装置。[Scope of Claim for Utility Model Registration] A presser foot 4 and a feed dog which are arranged near the needle drop point and are used to transfer the work cloth W on the work cloth support surface 7, and from the needle drop point to the work cloth delivery side. A supporting member 19 is provided, and a driving gear 32 or 33 is rotatably supported on the supporting member 19 to be rotatable around one axis extending in a direction perpendicular to the cloth feeding direction, and is connected to a driving source.
and a driven gear 43 that is rotatably supported on the support member 19 on an axis that extends parallel to the rotation axis of the drive gear 32 or 33 and is separated by a predetermined distance, and meshes with the drive gear 32 or 33. or 44, and is supported on the support member 19 on the same axis as the driven gear 43 or 44 so as to be rotatable together with the driven gear 43 or 44, and the work cloth W is rotated in contact with the upper surface of the work cloth W. Each of the feed rollers 41 and 42 is attached to the support member 19 so as to be replaceable, and when the feed rollers 41 and 4 are replaced, the feed rollers 41 and 4
Each of the gears 3
1. A work cloth guide device for a sewing machine, characterized in that the gear ratios are selected from 2, 33, 43, and 44.