JP3424191B2 - Sewing machine cloth feeder - Google Patents

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明はミシンの布送り装置に
関し、詳しくは布地に当接する送り歯の運動軌跡を調節
可能にし、適正な布地の送りをなすミシンの布送り装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth feed device for a sewing machine, and more particularly, to a cloth feed device for a sewing machine that allows the movement locus of a feed dog that comes into contact with a cloth to be adjusted to feed the cloth appropriately.

【０００２】[0002]

【従来の技術】ミシンには、縫い目形成の後に布地を所
定長さ（縫い目ピッチ）分送る布送り装置が設けられて
いる。図８は、ミシンの布送り装置の構成を示す図であ
る。図において１は送り歯であり、２はこの送り歯１を
固定する送り歯台である。また、３は水平送り機構、４
は上下送り機構であり、送り歯台２の端部にそれぞれ軸
支されている。次に、上下送り機構４の構成を説明す
る。図において２０は、不図示のミシンの上軸に偏心カ
ムを介して連結され、矢符に示すように上下に往復動を
なす上下送りロッドであり、１７はミシン機枠に回動自
在に設けられる上下送り軸である。2. Description of the Related Art A sewing machine is provided with a cloth feeding device that feeds cloth by a predetermined length (seam pitch) after forming seams. FIG. 8 is a diagram showing a configuration of a cloth feeding device of the sewing machine. In the figure, 1 is a feed dog, and 2 is a feed tooth base for fixing the feed tooth 1. Also, 3 is a horizontal feed mechanism, 4
Is an up-and-down feed mechanism, and is pivotally supported at the end of the feed dog bed 2. Next, the configuration of the vertical feed mechanism 4 will be described. In the figure, 20 is a vertical feed rod which is connected to an upper shaft of a sewing machine (not shown) through an eccentric cam and reciprocates up and down as shown by an arrow, and 17 is rotatably provided on the machine frame of the sewing machine. It is a vertical feed axis.

【０００３】そして１８は、一端を上下送り軸１７に固
定され、他端を上下送りロッド２０に軸支される腕体で
ある。また、１９は二又腕であり、一端を上下送り軸１
７に固定し、二又部で前記送り歯台２の一方端を支持し
ている。以上の構成からなる上下送り機構４は、上下送
りロッド２０の上下往復運動を、腕体１８および上下送
り軸１７により往復回動運動に変換し、二又腕１９で、
上下送り軸１７の回動運動を送り歯台２に伝達すること
で、送り歯１を上下方向に動作させることができる。次
に、水平送り機構３を説明する。図において５は、不図
示のミシンの上軸に偏心カムを介して連結され、矢符に
示すように上下方向に往復動をなす水平送りロッドであ
る。Reference numeral 18 denotes an arm body having one end fixed to the vertical feed shaft 17 and the other end pivotally supported by the vertical feed rod 20. Reference numeral 19 is a bifurcated arm, one end of which is the vertical feed shaft 1
It is fixed to 7, and one end of the feed dog bed 2 is supported by a bifurcated portion. The vertical feed mechanism 4 configured as described above converts the vertical reciprocating motion of the vertical feed rod 20 into a reciprocating rotary motion by the arm 18 and the vertical feed shaft 17, and the bifurcated arm 19
By transmitting the rotational movement of the vertical feed shaft 17 to the feed dog bed 2, the feed dog 1 can be moved in the vertical direction. Next, the horizontal feed mechanism 3 will be described. In the figure, 5 is a horizontal feed rod which is connected to the upper shaft of a sewing machine (not shown) through an eccentric cam and reciprocates in the vertical direction as shown by the arrow.

【０００４】そして、一端をミシン機枠に回動自在に設
けられる水平送り軸１４に固定される腕体２１と、一端
を水平送りロッド５に、他端を腕体２１にそれぞれ軸支
される連結リンク２２と、により、水平送りロッド５の
上下往復運動を連結リンク２２により揺動運動に変換し
て、その揺動は腕体２１の回動揺動量に応じて水平送り
軸１４に伝達するようになっている。また、２５は水平
送り腕であり、この水平送り腕２５は一端を水平送り軸
１４に固定し、他端を軸Ｐにより送り歯台２を回動自在
にし、水平送り軸１４の運動を送り歯台２に伝達するこ
とで送り歯１を水平方向に動作させることができる。
尚、水平送りロッド５は上記連結リンク２２を軸支する
とともにミシン機枠に支軸２４ａによって回動自在に支
持される送り調節リンク２４に一端を連結する連結リン
ク２３の他端を軸支している。An arm 21 fixed at one end to a horizontal feed shaft 14 rotatably provided on the machine frame, one end at the horizontal feed rod 5, and the other end at the arm 21 are pivotally supported. By the connection link 22, the vertical reciprocating motion of the horizontal feed rod 5 is converted into a swing motion by the connection link 22, and the swing is transmitted to the horizontal feed shaft 14 according to the swing swing amount of the arm body 21. It has become. Reference numeral 25 denotes a horizontal feed arm. This horizontal feed arm 25 has one end fixed to the horizontal feed shaft 14 and the other end which allows the feed tooth base 2 to be rotatable by an axis P to feed the movement of the horizontal feed shaft 14. The feed dog 1 can be moved in the horizontal direction by transmitting to the tooth base 2.
The horizontal feed rod 5 pivotally supports the connecting link 22 and also pivotally supports the other end of the connecting link 23, one end of which is connected to the feed adjusting link 24 which is rotatably supported by the supporting shaft 24a on the sewing machine frame. ing.

【０００５】そして、連結リンク２２、２３および送り
調節リンク２４とで公知の送り量変換機構を形成してい
る。以上の構成からなるミシンの布送り装置は、図９に
示すように上下送り機構４による上下方向への移動成分
と、水平送り機構３による水平方向への移動成分との合
成運動により、送り歯１を矢符に示すように楕円状に動
作させることができ、ミシンの針板２６よりこの送り歯
１を出没させて、針板２６上に載置される布地（不図
示）を間欠的に送ることができる。The connecting links 22 and 23 and the feed adjusting link 24 form a known feed amount converting mechanism. As shown in FIG. 9, the cloth feeding device for a sewing machine having the above-described structure uses a combined motion of the vertical movement component of the vertical feed mechanism 4 and the horizontal movement component of the horizontal feed mechanism 3 to cause the feed dog to move. 1 can be operated in an elliptical shape as shown by the arrow, and the feed dog 1 is projected and retracted from the needle plate 26 of the sewing machine to intermittently dispose the cloth (not shown) placed on the needle plate 26. Can be sent.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、上記従
来のミシンの布送り装置には次のような問題がある。送
り歯（送り歯台）は、図９に示すように一端を上下送り
機構４に、そして他端を水平送り機構３に軸支され、こ
れら各機構の合成運動により所定の運動をなすように構
成されているため、水平状態を維持して動作することが
できない。すなわち、送り歯１は、水平送り機構３の軸
Ｐを中心にして、上下送り機構４の運動により図１０に
示すように上死点位置では針板に平行であるがその他の
位置では前記軸Ｐの位置により実線および点線で示すよ
うに傾きつつ運動をなす。これにより、送り歯１と布地
Ｗとの当接時、図１０の一点鎖線に示すように、まず送
り歯１の角部と布地Ｗとが当接してしまう。However, the above-mentioned conventional cloth feeding device for the sewing machine has the following problems. As shown in FIG. 9, one end of the feed dog (feed tooth base) is pivotally supported by the vertical feed mechanism 4 and the other end is pivotally supported by the horizontal feed mechanism 3, so that a predetermined movement is performed by a combined movement of these respective mechanisms. Since it is configured, it cannot operate while maintaining the horizontal state. That is, the feed dog 1 is parallel to the needle plate at the top dead center position as shown in FIG. 10 by the movement of the vertical feed mechanism 4 about the axis P of the horizontal feed mechanism 3, but the above-mentioned axis at other positions. Depending on the position of P, exercise is performed while inclining as shown by the solid line and the dotted line. As a result, when the feed dog 1 and the cloth W come into contact with each other, the corner portion of the feed dog 1 and the cloth W first come into contact with each other, as shown by the alternate long and short dash line in FIG.

【０００７】そして送り歯１の角部と布地Ｗとの当接の
際、布地Ｗは容易に移動可能な状態にあるため、この送
り歯１の角部の当接によって下布Ｗ１のみが送り方向
（図においては左方向）に僅かに移動し、下布Ｗ１と、
上布Ｗ２との間に位置ずれが生じてしまう。この下布Ｗ
１と上布Ｗ２との位置ずれは、ミシンの布送り装置の１
針当たりの送り動作で、０．０２ミリ前後の僅かなもの
であるが、数百回におよぶ布送り動作によりこの位置ず
れが加算され、縫製終了時において下布Ｗ１と上布Ｗ２
との布端部に数ミリの位置ずれが生じる、いわゆるイサ
リを生じてしまう。また、送り歯１の角部の当接によ
り、布地Ｗに僅かな弛みが発生し、形成した縫い目長さ
が設定値よりも短いものとなる、いわゆるパッカリング
も生じる。また、偏心カムを介して連結した水平送りロ
ッド５および上送りロッド２０はそれぞれ一体に上軸に
固定され、それぞれは位相調整ができないので、送り軌
跡の変更が不可能であった。When the corners of the feed dog 1 come into contact with the cloth W, the cloth W is in a state of being easily movable. Therefore, the corner of the feed dog 1 comes into contact with the lower cloth W1 only. Direction (to the left in the figure), move slightly to the bottom cloth W1,
A positional shift will occur between the upper cloth W2 and the upper cloth W2. This undercloth W
1 and the upper cloth W2 are displaced from each other by the 1 of the cloth feeding device of the sewing machine.
The feed operation per needle is as small as about 0.02 mm, but this positional deviation is added by the cloth feed operation performed several hundred times, and the lower cloth W1 and the upper cloth W2 are sewn at the end of sewing.
A misalignment of several millimeters occurs at the cloth end portion of the so-called "crest". Further, due to the contact of the corners of the feed dog 1, a slight slack is generated in the fabric W, and so-called puckering occurs in which the formed stitch length is shorter than the set value. Further, since the horizontal feed rod 5 and the upper feed rod 20 connected through the eccentric cam are integrally fixed to the upper shaft and the phase of each cannot be adjusted, the feed locus cannot be changed.

【０００８】[0008]

【課題を解決するための手段】この発明に係るミシンの
布送り装置は、上記従来の課題を解決するためになされ
たもので、ミシンの布送り装置の上下送り機構を、送り
歯台の両端にそれぞれ一端を軸支される第１および第２
リンクと、前記第１および第２リンクの他端にそれぞれ
軸支され、ミシン上軸の回転により第１および第２リン
クをそれぞれ同速度、同方向に上下動させる第１および
第２上下手段と、により構成し、前記水平送り機構を送
り歯台あるいは上下送り機構の第２リンクの一端に軸支
される第１伝達腕と、ミシンの上軸に同期して往復回動
する水平送り軸に一端を固定され、他端を前記第１伝達
腕の他端に軸支される第２伝達腕と、により構成して、
送り歯台を常に水平に維持して動作させるようにして上
記従来の課題を解決しようとするものである。A cloth feeding device for a sewing machine according to the present invention has been made to solve the above-mentioned conventional problems. The vertical feeding mechanism of the cloth feeding device for a sewing machine is provided at both ends of a feed dog bed. The first and second shafts, each of which has one end pivotally supported
A link, and first and second vertically moving means that are axially supported by the other ends of the first and second links and that vertically rotate the first and second links at the same speed and in the same direction by the rotation of the upper shaft of the sewing machine. And a first transmission arm pivotally supported at one end of a second link of a feed tooth base or a vertical feed mechanism, and a horizontal feed shaft that reciprocally rotates in synchronization with the upper shaft of the sewing machine. One end is fixed and the other end is constituted by a second transmission arm pivotally supported by the other end of the first transmission arm,
It is an object of the present invention to solve the above-described conventional problems by always operating the feed dog table while keeping it horizontal.

【０００９】[0009]

【作用】この発明に係るミシンの布送り装置は、上下送
り機構により、送り歯台の両端をそれぞれ同方向、同速
度で上下動させるようにし、送り歯を常に水平状態を維
持した状態で動作させる。また、上下送り機構は、第１
および第２リンクを、それぞれ同方向に同角度分傾け
て、送り歯を水平に維持した状態で水平方向に往復動作
させる。さらに、水平送りロッド、第１および第２の上
下送りロッドまたは第１および第２回動腕に夫々位置関
係を回転方向において位置調整可能な固定位置調節手段
または軸支点調節手段を設けたので、送り軌跡の変更が
自在である。In the cloth feeding device for the sewing machine according to the present invention, the both ends of the feed tooth base are moved up and down in the same direction and at the same speed by the vertical feed mechanism, and the feed dog operates in a state where it is always kept horizontal. Let The vertical feed mechanism is the first
The second link is tilted in the same direction by the same angle, and is reciprocated in the horizontal direction while keeping the feed dog horizontal. Further, since the horizontal feed rod, the first and second vertical feed rods, or the first and second rotating arms are provided with fixed position adjusting means or shaft fulcrum adjusting means capable of adjusting the positional relationship in the rotational direction, respectively. The feed path can be changed freely.

【００１０】[0010]

【実施例】図面にもとづいてこの発明の実施例を説明す
る。なお従来例と同一箇所には同一符号を付して重複説
明は省略する。図１ないし図４は、この出願の第１実施
例を示す図である。このミシンの布送り装置は、送り歯
１を上下方向へ往復動させる第１および第２の上下手段
Ａ、Ｂからなる上下送り機構と、送り歯１を水平方向へ
往復動させる水平送り機構と、を備えて構成されてい
る。まず図１ないし図３により、それぞれ一対のリンク
およびこれらを上下動させ第１および第２上下手段Ａ、
Ｂにより構成される上下送り機構を説明する。 図１に
おいて、Ｌ１は第１リンク、Ｌ２は第２リンクであり、
これら第１および第２リンクＬ１、Ｌ２は、それぞれ両
端に軸部を備えている。Embodiments of the present invention will be described with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals, and the duplicated description will be omitted. 1 to 4 are views showing a first embodiment of this application. The cloth feed device of this sewing machine includes a vertical feed mechanism including first and second vertical movement means A and B for reciprocating the feed dog 1 in the vertical direction, and a horizontal feed mechanism for reciprocating the feed tooth 1 in the horizontal direction. , And are configured. First, referring to FIG. 1 to FIG. 3, a pair of links and first and second vertically moving means A for vertically moving these links,
The vertical feed mechanism constituted by B will be described. In FIG. 1, L1 is the first link, L2 is the second link,
Each of the first and second links L1 and L2 has a shaft portion at both ends.

【００１１】そして、これら第１および第２上下手段
Ａ、Ｂは、前記第１および第２リンクＬ１、Ｌ２をそれ
ぞれ上下に往復動させるよう、第１および第２リンクＬ
１、Ｌ２の他端に軸支されている。この第１および第２
上下手段Ａ、Ｂは、ミシンの上軸３０に偏心カム３１を
介して連結され上下に往復動をなす第１および第２の上
下送りロッド１２、１３と、一端を第１および第２上下
送り軸６、７に固定し、他端を第１および第２上下送り
ロッド１２、１３に軸支する第１および第２回動腕８、
９と、一端を第１および第２上下送り軸６、７に固定
し、他端を前記第１および第２リンクＬ１、Ｌ２の他端
に軸支される第１および第２上下腕１０、１１と、から
なっている。なお、第１および第２リンクＬ１、Ｌ２の
一端は送り歯台２に連結されている。The first and second vertical means A and B are arranged so that the first and second links L1 and L2 reciprocate up and down, respectively.
It is rotatably supported at the other end of L1 and L2. This first and second
The up-and-down means A and B are connected to the upper shaft 30 of the sewing machine via an eccentric cam 31, and reciprocate up and down first and second up-and-down feed rods 12 and 13, and one end is first and second up-and-down feed. First and second rotating arms 8 fixed to the shafts 6 and 7 and having the other ends pivotally supported by the first and second vertical feed rods 12 and 13,
9, first and second upper and lower arms 10, one end of which is fixed to the first and second vertical feed shafts 6 and 7, and the other end of which is pivotally supported by the other ends of the first and second links L1 and L2. It consists of 11. Note that one ends of the first and second links L1 and L2 are connected to the feed dog bed 2.

【００１２】次に水平送り機構を説明する。図１におい
て、５はミシンの上軸３０に偏心カム３１を介して連結
され上下に往復動をなす水平送りロッド、１５は第１伝
達腕であり、この第１伝達腕１５は一端を送り歯台２に
軸支されている。そして、１６は第２伝達腕であり、こ
の第２伝達腕１６は、一端は水平送り軸１４に固定さ
れ、他端は前記第１伝達腕１５の他端に軸支されてい
る。なお、水平送り軸１４は、前記第２上下送り軸７に
形成される貫通穴内に回動可能に挿入されている。そし
て、前記第２上下送り軸７の両側端は水平送り軸１４の
溝に嵌合装着した止め輪１４ａにてその左右方向が規制
されている。Next, the horizontal feed mechanism will be described. In FIG. 1, reference numeral 5 is a horizontal feed rod which is connected to an upper shaft 30 of a sewing machine through an eccentric cam 31 and reciprocates up and down. Reference numeral 15 is a first transmission arm, one end of which is a feed dog. It is pivotally supported on the base 2. 16 is a second transmission arm, one end of which is fixed to the horizontal feed shaft 14 and the other end of which is pivotally supported by the other end of the first transmission arm 15. The horizontal feed shaft 14 is rotatably inserted in a through hole formed in the second vertical feed shaft 7. The left and right sides of the second vertical feed shaft 7 are regulated by the retaining rings 14a fitted and mounted in the grooves of the horizontal feed shaft 14.

【００１３】なお、上記第１および第２の上下送りロッ
ド１２、１３と水平送りロッド５は、上軸３０（上軸に
関連する部材でも良い）にそれぞれ独立して個別に装着
されるとともに偏心カム固定位置調節手段としてのねじ
３２を備えている。次にこの実施例の作用を説明する。
前記上下送り機構の第１および第２送りロッド１２、１
３は、ミシンの主軸の回転によって、それぞれ同方向に
同速度で上下運動をなす。そして、第１および第２回動
腕８、９と、第１および第２上下送り軸６、７とによ
り、第１および第２送りロッド１２、１３の上下運動
は、往復回動運動に変換され、第１および第２上下腕１
０および１１は、それぞれ同方向、同速度で往復回動運
動をなすことができる。The first and second vertical feed rods 12 and 13 and the horizontal feed rod 5 are individually mounted individually on the upper shaft 30 (which may be a member related to the upper shaft) and are eccentric. A screw 32 is provided as a cam fixed position adjusting means. Next, the operation of this embodiment will be described.
The first and second feed rods 12 and 1 of the vertical feed mechanism
The rotation of the main shaft of the sewing machine causes the sewing machine 3 to move up and down in the same direction at the same speed. The vertical movements of the first and second feed rods 12 and 13 are converted into reciprocating rotary movements by the first and second rotary arms 8 and 9 and the first and second vertical feed shafts 6 and 7. And the first and second upper and lower arms 1
0 and 11 can make a reciprocating rotary motion at the same direction and the same speed, respectively.

【００１４】これにより、第１および第２上下腕１０、
１１は、第１および第２リンクＬ１、Ｌ２を介して、送
り歯台２（送り歯１）の両端部を、それぞれ同速度で上
昇、または同速度で下降させ、図２に示す前記線分Ｄと
の平行運動を常に維持つつ送り歯１を上下動させる、す
なわち送り歯１を常に水平状態に維持して上下に往復動
させることができる。一方、水平送り機構は、ミシンの
上軸の回転により往復回動運動をなす水平送り軸１４に
より、第２伝達腕１６を往復回動させ、第１伝達腕１５
を介してこの往復回動を送り歯台２に伝達する。As a result, the first and second upper and lower arms 10,
Numeral 11 raises or lowers both ends of the feed tooth base 2 (feed tooth 1) at the same speed or at the same speed via the first and second links L1 and L2, respectively, and the line segment shown in FIG. The feed dog 1 can be moved up and down while always maintaining the parallel movement with D, that is, the feed dog 1 can be always maintained in the horizontal state and reciprocated up and down. On the other hand, in the horizontal feed mechanism, the second transmission arm 16 is reciprocally rotated by the horizontal feed shaft 14 that makes a reciprocating rotation movement by the rotation of the upper shaft of the sewing machine, and the first transmission arm 15 is moved.
This reciprocating rotation is transmitted to the feed tooth base 2 via.

【００１５】一方、水平送り機構による送り歯１の水平
方向への動作時に、両リンクＬ１、Ｌ２は、図３に示す
ようにそれぞれ同方向に移動をなし、送り歯１を常に水
平状態に維持して、水平方向に往復動することができ
る。以上のようにしてこの実施例に係るミシンの布送り
装置は、上下送り機構による上下方向への移動成分と、
水平送り機構による水平方向への移動成分との合成運動
により、送り歯１を図４に示すように、常に水平を維持
した状態で楕円状に回動させることができる。これによ
り送り歯１は、布地Ｗとの当接時において、送り歯１の
歯部の全面を同時に布地Ｗと当接させ、布地Ｗを確実に
支持した状態で送り動作をなし、布地Ｗの位置ずれ、弛
み発生を解消し、イサリ、パッカリング等を生じること
のない適正な布地Ｗの送りを可能とする。On the other hand, when the feed dog 1 is moved in the horizontal direction by the horizontal feed mechanism, both links L1 and L2 move in the same direction as shown in FIG. 3, and the feed dog 1 is always kept in the horizontal state. Then, it can reciprocate in the horizontal direction. As described above, the cloth feeding device for the sewing machine according to this embodiment has a vertical movement component by the vertical feeding mechanism,
As shown in FIG. 4, the feed dog 1 can be rotated in an elliptical shape while always being horizontal by the combined movement of the horizontal feed mechanism and the horizontal movement component. As a result, the feed dog 1 is brought into contact with the cloth W at the same time when the entire surface of the tooth portion of the feed tooth 1 is brought into contact with the cloth W at the same time, and the feed operation is performed while the cloth W is reliably supported. Displacement and slack are prevented from occurring, and proper feeding of the cloth W is possible without causing crinkling or puckering.

【００１６】また、図１において偏心カム固定位置調節
手段３２をゆるめて上軸３０を手動回転して所望の位置
で偏心カム固定位置調節手段３２で偏心カムを固定して
水平送りロッド５、第１および第２の上下送りロッド１
２、１３のの位相調整を行うことにより、例えば図５の
軌跡Ｉ、Ｊに示すように送り歯１の軌跡を種々に変化さ
せることもできる。Further, in FIG. 1, the eccentric cam fixing position adjusting means 32 is loosened, the upper shaft 30 is manually rotated, and the eccentric cam is fixed at the desired position by the eccentric cam fixing position adjusting means 32. 1 and second vertical feed rod 1
By adjusting the phases of 2 and 13, it is possible to change the trajectory of the feed dog 1 in various ways as shown by the trajectories I and J of FIG.

【００１７】次に、図６および図７にもとづいて、この
出願の第２の実施例を説明する。なお、上述のミシンの
実施例と同一箇所には同一符号を付して重複説明は省略
する。図６において、Ｘ、Ｙは、第１および第２上下手
段Ａ、Ｂに、それぞれ設けられた軸支点調節手段であ
る。この軸支点調節手段Ｘ、Ｙは、第１および第２回動
腕８、９にそれぞれ形成された長穴８ａ、９ａと、第１
および第２上下送りロッド１２、１３にそれぞれ設けら
れる軸部（不図示）と、これら軸部に螺合し、各軸部を
長穴８ａ、９ａ内で支持する軸ねじ（例えばナット）８
ｂ、９ｂと、からなっている。Next, a second embodiment of this application will be described with reference to FIGS. 6 and 7. The same parts as those of the above-described embodiment of the sewing machine are designated by the same reference numerals, and the duplicated description will be omitted. In FIG. 6, X and Y are shaft fulcrum adjusting means provided in the first and second up-and-down means A and B, respectively. The shaft fulcrum adjusting means X and Y include elongated holes 8a and 9a formed in the first and second rotating arms 8 and 9, respectively.
And shaft parts (not shown) provided on the second vertical feed rods 12 and 13, respectively, and shaft screws (for example, nuts) 8 screwed on these shaft parts and supporting the shaft parts in the elongated holes 8a and 9a.
It consists of b and 9b.

【００１８】そしてこの軸支点調節手段Ｘ、Ｙは、第１
および第２上下送りロッド１２、１３と、第１および第
２回動腕８、９との軸支点位置（軸部位置）を調節する
ことで、第１および第２上下送り軸６、７の回動量を変
化させ、送り歯１の上下方向への送り量を調節すること
ができる。例えば、第１および第２上下送りロッド１
２、１３を、第１および第２上下送り軸６、７方向に近
づけ、これら軸６、７の回動量を大きくすることで、図
７に示すように、通常の送り歯軌跡Ｇに比べ、軌跡Ｈに
示すように、送り歯１の上下方向の移動量を大きくする
ことができる。また、第１および第２上下送りロッド１
２、１３を、第１および第２上下送り軸６、７から遠ざ
け、これら軸６、７の回動量を小さくすることで、軌跡
Ｆに示すように、送り歯１の上下方向の移動量を小さく
することができる。そして、また軸支点調節手段Ｘ、Ｙ
により、第１および第２上下送り軸６、７の回動量をそ
れぞれ異なるように調節することにより、例えば図５の
軌跡Ｉ、Ｊに示すように、送り歯１の軌跡を種々変化さ
せることもできる。The axis fulcrum adjusting means X and Y are the first
By adjusting the axial fulcrum position (shaft portion position) between the first and second pivot arms 8 and 9 and the second vertical feed rods 12 and 13, the first and second vertical feed shafts 6 and 7 are adjusted. The amount of rotation of the feed dog 1 can be adjusted by changing the amount of rotation. For example, the first and second vertical feed rods 1
2, 13 are brought closer to the first and second vertical feed shafts 6 and 7 and the rotation amounts of these shafts 6 and 7 are increased, so that as shown in FIG. As shown by the locus H, the vertical movement amount of the feed dog 1 can be increased. In addition, the first and second vertical feed rods 1
By moving 2 and 13 away from the first and second vertical feed shafts 6 and 7 and reducing the amount of rotation of these shafts 6 and 7, as shown by the locus F, the vertical movement amount of the feed dog 1 is increased. Can be made smaller. And again, the shaft fulcrum adjusting means X, Y
By adjusting the turning amounts of the first and second vertical feed shafts 6 and 7 to be different from each other, the locus of the feed dog 1 can be variously changed as shown in loci I and J of FIG. 5, for example. it can.

【００１９】なお、この実施例において、軸支点調節手
段Ｘ、Ｙの長穴を第１および第２回動腕８、９に、軸部
を第１および第２上下送りロッド１２、１３に設けた例
を示したが、第１および第２回動腕８、９にそれぞれ軸
部を設け、第１および第２上下送りロッド１２、１３に
それぞれ長穴を設けても良い。なお、この実施例におけ
る基本的動作は前述の実施例と同様である。In this embodiment, the elongated holes of the shaft fulcrum adjusting means X and Y are provided in the first and second rotating arms 8 and 9, and the shaft portions are provided in the first and second vertical feed rods 12 and 13. However, the shaft portions may be provided on the first and second rotating arms 8 and 9, respectively, and the elongated holes may be provided on the first and second vertical feed rods 12 and 13, respectively. The basic operation of this embodiment is the same as that of the previous embodiment.

【００２０】[0020]

【発明の効果】この発明に係るミシンの布送り装置は、
以上説明したように、上下送り機構を、送り歯台の両端
にそれぞれ軸支され、第１および第２リンクをそれぞれ
同速度、同方向に上下動させる、第１および第２上下手
段と、により構成し、水平送り機構を、水平送り軸の回
動を送り歯台に伝達する第１伝達腕および第２伝達腕
と、により構成したので、送り歯を常に水平状態を維持
して動作させることができ、送り歯と布地との当接時、
送り歯の歯部の全面を同時に布地と当接させ、布地を確
実に支持した状態で送り動作をなし、布地の位置ずれ、
弛みの発生を解消し、イサリ、パッカリング等を生じる
ことがなく、かつ布地に当接する送り歯の運動軌跡を調
整可能としたので、各種の布地に対応が可能となる。The cloth feed device for the sewing machine according to the present invention is
As described above, the vertical feed mechanism is pivotally supported at both ends of the feed dog bed, and the first and second vertical means move the first and second links up and down in the same speed and in the same direction. Since the horizontal feed mechanism is configured by the first transmission arm and the second transmission arm that transmit the rotation of the horizontal feed shaft to the feed tooth base, the feed tooth is always maintained in the horizontal state and operated. When the feed dog comes into contact with the cloth,
The entire surface of the tooth portion of the feed dog is brought into contact with the fabric at the same time, and the feeding operation is performed while the fabric is securely supported.
Since the occurrence of slack is eliminated, the movement locus of the feed dog that comes into contact with the cloth can be adjusted without causing crinkling, puckering, etc., it is possible to cope with various kinds of cloth.

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

【図１】この発明に係るミシンの布送り装置の第１実施
例を示す外観斜視図である。FIG. 1 is an external perspective view showing a first embodiment of a cloth feeding device for a sewing machine according to the present invention.

【図２】図１に示した布送り装置の第１および第２リン
クと各上下手段と、送り歯台と、の連結状態を示す説明
図である。FIG. 2 is an explanatory view showing a connection state of first and second links of the cloth feeding device shown in FIG.

【図３】図１に示した布送り装置の送り歯台の水平方向
への動作状態を示す説明図である。FIG. 3 is an explanatory diagram showing a horizontal operating state of a feed dog bed of the cloth feeding device shown in FIG. 1;

【図４】図１に示した布送り装置の、送り歯動作状態を
示す説明図である。FIG. 4 is an explanatory view showing a feed dog operating state of the cloth feeding apparatus shown in FIG.

【図５】図１および図６に示したミシンの布送り装置
の、偏心カム固定位置調節手段および軸支点調節手段に
より、送り歯の両端の上下送り量をそれぞれ異なる量と
した際の、送り歯の軌跡を示す説明図である。FIG. 5 is a view showing a case where the eccentric cam fixing position adjusting means and the shaft fulcrum adjusting means of the cloth feeding device of the sewing machine shown in FIGS. It is explanatory drawing which shows the locus | trajectory of a tooth.

【図６】この出願の第２実施例を示す外観斜視図であ
る。FIG. 6 is an external perspective view showing a second embodiment of this application.

【図７】図６に示したミシンの布送り装置の、軸支点調
節手段により送り歯の上下方向の移動量を調節した際
の、送り歯の軌跡変化を示す説明図である。FIG. 7 is an explanatory diagram showing a trajectory change of the feed dog when the vertical movement amount of the feed dog is adjusted by the shaft fulcrum adjusting means of the cloth feed device for the sewing machine shown in FIG. 6;

【図８】従来のミシンの布送り装置の構成状態を示す外
観斜視図である。FIG. 8 is an external perspective view showing a configuration state of a conventional cloth feeding device for a sewing machine.

【図９】図８に示したミシンの布送り装置による送り歯
の動作状態を示す説明図である。9 is an explanatory view showing an operating state of feed dogs by the cloth feed device of the sewing machine shown in FIG. 8. FIG.

【図１０】図８に示したミシンの布送り装置の送り歯の
動作時において、送り歯の角部が布地に当接した状態を
示す説明図である。10 is an explanatory diagram showing a state in which the corners of the feed dog are in contact with the cloth when the feed dog of the cloth feed device for the sewing machine shown in FIG. 8 is operating.

【符号の説明】[Explanation of symbols]

１ 送り歯 ２ 送り歯台 ８ 第１回動腕 ９ 第２回動腕 Ａ 第１上下手段 Ｂ 第２上下手段 Ｌ１ 第１リンク Ｌ２ 第２リンク １５ 第１伝達腕 １６ 第２伝達腕 1 Feed dog 2 Feed dog bed 8 First rotating arm 9 Second rotating arm A first up-and-down means B second lifting means L1 first link L2 second link 15 First transmission arm 16 Second transmission arm

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】送り歯台に固定される送り歯と、 この送り歯を上下方向へ往復動させる上下送り機構と、 送り歯を水平方向へ往復動させる水平送り機構と、を備
え、 上下方向への移動成分と水平方向への移動成分との合成
運動により送り歯が所定の布送り動作をなすミシンの布
送り装置において、前記上下送り機構を、 ミシンの上軸に連結され上下運動をなす第１及び第２上
下送りロッドと、 ミシン機枠に回動自在に設けられる第１および第２上下
送り軸と、 一端を第１上下送りロッドに軸支され、他端は第１上下
送り軸に固定される第１回動腕と、 一端を第２上下送りロッドに軸支され、他端は第２上下
送り軸に固定される第２回動腕と、 送り歯台の両端にそれぞれ一端を軸支される第１および
第２リンクと、 一端を第１リンクの他端に軸支され、他端を第１上下送
り軸に固定される第１上下腕と、 一端を第２リンクの他端に軸支され、他端を第２上下送
り軸に固定される第２上下腕と、により構成されるとと
もに、 前記各上下送りロッドと、前記各回動腕との軸支点の位
置調節をなすため軸支点調節手段を設け、この軸支点調
節手段を、各上下送りロッドまたは各回動腕の、いずれ
か一方にそれぞれ形成される長穴と、前記各上下送りロ
ッドまたは各回動腕のいずれかに設けられ、長穴に係合
する軸部と、この軸部に螺号する軸ねじと、により構成
し、 前記水平送り機構を、 送り歯台および上下送り機構の第２リンクの一端に軸支
される第１伝達腕と、 ミシンの上軸に同期して往復回動する水平送り軸に一端
を固定され、他端を前記第１伝達腕の他端に軸支される
第２伝達腕と、により構成たことを特徴とするミシンの
布送り装置。 1. A feed dog fixed to a feed tooth base, a vertical feed mechanism for reciprocating the feed dog in the vertical direction, and a horizontal feed mechanism for reciprocating the feed dog in the horizontal direction. In a cloth feeding device of a sewing machine in which a feed dog performs a predetermined cloth feeding operation by a combined motion of a moving component to a sewing machine and a moving component to a horizontal direction, the vertical feeding mechanism is connected to an upper shaft of the sewing machine to perform a vertical movement. First and second top
Lower feed rod and first and second upper and lower rotatably provided on the machine frame of the sewing machine
The feed shaft and one end are pivotally supported by the first vertical feed rod, and the other end is the first vertical feed rod.
A first rotating arm fixed to the feed shaft, one end of which is pivotally supported by a second vertical feed rod, and the other end of which is the second vertical feed rod.
A second rotating arm fixed to the feed shaft, and first and second shafts each having one end rotatably supported at both ends of the feed tooth base.
A second link, one end of which is pivotally supported by the other end of the first link, and the other end of which is the first vertical feed.
The first upper and lower arms fixed to the shaft, one end is pivotally supported by the other end of the second link, and the other end is the second vertical feed.
And the second upper and lower arms fixed to the shaft,
Moni, wherein each vertical feed rod, position of pivotal point of said each time Doude
The shaft fulcrum adjustment means is provided to adjust the position.
Either of the knot means of each vertical feed rod or each pivot arm
The long holes formed on either side and the vertical feed rolls
Provided on either the lid or each rotating arm, and engages in the long hole
And a shaft screw that is screwed to the shaft.
Then, the horizontal feed mechanism is pivotally supported at one end of the feed link and the second link of the vertical feed mechanism.
One end of the first transmission arm and the horizontal feed shaft that reciprocally rotates in synchronization with the upper shaft of the sewing machine.
Is fixed, and the other end is pivotally supported on the other end of the first transmission arm.
A second transmission arm, and
Cloth feeding device. 【請求項２】送り歯台に固定される送り歯と、 この送り歯を上下方向へ往復動させる上下送り機構と、 送り歯を水平方向へ往復動させる水平送り機構と、を備
え、 上下方向への移動成分と水平方向への移動成分との合成
運動により送り歯が所定の布送り動作をなすミシンの布
送り装置において、前記上下送り機構を、 ミシンの上軸に設けられ、ミシンの上軸との位置関係を
回転方向において、調節可能な第１および第２偏心カム
と、 第１偏心カムに係合し、第１偏心カムとの当接により上
下運動をなす第１上下送りロッドと、 第２偏心カムに係合し、第２偏心カムとの当接により上
下運動をなす第２上下送りロッドと、 ミシン機枠に回動自在に設けられる第１および第２上下
送り軸と、 一端を第１上下送りロッドに軸支され、他端は第１上下
送り軸に固定される第１回動腕と、 一端を第２上下送りロッドに軸支され、他端は第２上下
送り軸に固定される第２回動腕と、 送り歯台の両端にそれぞれ一端を軸支される第１および
第２リンクと、 一端を第１リンクの他端に軸支され、他端を第１上下送
り軸に固定される第１上下腕と、 一端を第２リンクの他端に軸支され、他端を第２上下送
り軸に固定される第２上下腕と、により構成し、 前記水平送り機構は、 ミシンの上軸に設けられミシン上軸との位置関係を回転
方向において調節可能な第３偏心カムと、 この第３偏心カムに係合し、第３偏心カムとの当接によ
り上下動をなす水平送りロッドと、 ミシン機枠に回動自在に設けられ、一端を前記水平送り
ロッドに連結される水 平送り軸と、 送り歯台および上下送り機構の第２リンクの一端に軸支
される第１伝達腕と、 ミシンの上軸に同期して往復回動する前記水平送り軸に
一端を固定され、他端を前記第１伝達腕の他端に軸支さ
れる第２伝達腕と、により前記水平送り軸を往復回動す
るよう構成したことを特徴とするミシンの布送り装置。 2. A feed dog fixed to a feed dog bed, a vertical feed mechanism for vertically reciprocating the feed dog, and a horizontal feed mechanism for horizontally reciprocating the feed dog. In a cloth feeding device of a sewing machine in which a feed dog performs a predetermined cloth feeding operation by a combined motion of a moving component to the sewing machine and a moving component to the horizontal direction, the vertical feeding mechanism is provided on the upper shaft of the sewing machine, The positional relationship with the axis
First and second eccentric cams adjustable in the direction of rotation
When engaged with the first eccentric cam, on the abutment of the first eccentric cam
The first vertical feed rod that makes a downward motion is engaged with the second eccentric cam, and the second eccentric cam makes contact with the upper and lower feed rods to raise
A second vertical feed rod that makes a downward motion, and first and second vertical feeds that are rotatably provided on the machine frame of the sewing machine.
The feed shaft and one end are pivotally supported by the first vertical feed rod, and the other end is the first vertical feed rod.
A first rotating arm fixed to the feed shaft, one end of which is pivotally supported by a second vertical feed rod, and the other end of which is the second vertical feed rod.
A second rotating arm fixed to the feed shaft, and first and second shafts each having one end rotatably supported at both ends of the feed tooth base.
A second link, one end of which is pivotally supported by the other end of the first link, and the other end of which is the first vertical feed.
The first upper and lower arms fixed to the shaft, one end is pivotally supported by the other end of the second link, and the other end is the second vertical feed.
A second upper and lower arm fixed to the rotary shaft, and the horizontal feed mechanism is provided on the upper shaft of the sewing machine and rotates the positional relationship with the upper shaft of the sewing machine.
Directionally adjustable third eccentric cam and the third eccentric cam that engages and abuts against the third eccentric cam.
The horizontal feed rod that moves up and down and the sewing machine frame are rotatably provided and one end of the horizontal feed rod
A horizontal feed shaft connected to the rod, pivotally supported on one end of the second link of the feed dog block and up-and-down feed mechanism
The first transmission arm and the horizontal feed shaft that reciprocally rotates in synchronization with the upper shaft of the sewing machine.
One end is fixed and the other end is pivotally supported on the other end of the first transmission arm.
And a second transmission arm that rotates the horizontal feed shaft back and forth.
A cloth feeding device for a sewing machine, which is configured as described above.