JPH0857174A - Holding device of cloth in sewing machine - Google Patents
Holding device of cloth in sewing machineInfo
- Publication number
- JPH0857174A JPH0857174A JP19519694A JP19519694A JPH0857174A JP H0857174 A JPH0857174 A JP H0857174A JP 19519694 A JP19519694 A JP 19519694A JP 19519694 A JP19519694 A JP 19519694A JP H0857174 A JPH0857174 A JP H0857174A
- Authority
- JP
- Japan
- Prior art keywords
- cloth
- holding
- work
- upper thread
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加工布を布押え体によ
り押えるミシンの布押え装置において、特に、縫針と上
糸供給源との間に位置する上糸を挟み込む挟持体と前記
布押え体との連動関係に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth pressing device for a sewing machine which presses a work cloth by a cloth pressing body, and more particularly, a holding body for sandwiching an upper thread located between a sewing needle and an upper thread supply source and the above-mentioned cloth pressing section. Regarding the interlocking relationship with the body.
【０００２】[0002]
【従来の技術】ミシンには、操作体の回動操作に伴い、
加工布を押える布押え位置および加工布から離間した第
１の離間位置へ布押え体を移動させる構成の布押え装置
が具備されている。この構成の場合、縫針と上糸供給源
との間に位置する上糸を挟み込み、糸調子を生じさせる
挟持体が設けられており、布押え体が布押え位置へ移動
すると、挟持体が挟持位置へ移動して上糸を挟み込む。
また、布押え体が第１の離間位置へ移動すると、挟持体
が解放位置へ移動して上糸に対する挟持力を解放する。2. Description of the Related Art A sewing machine has a
There is provided a cloth pressing device configured to move the cloth pressing body to a cloth pressing position for pressing the work cloth and a first separated position separated from the work cloth. In the case of this configuration, a pinching body for pinching the upper thread located between the sewing needle and the upper thread supply source to generate the thread tension is provided, and when the cloth pressing body moves to the cloth pressing position, the nipping body is clamped. Move to the position and pinch the upper thread.
Further, when the cloth pressing body moves to the first separated position, the holding body moves to the releasing position and releases the holding force for the upper thread.
【０００３】ところで、上記布押え装置においては、操
作体の操作に伴い、第１の離間位置より一層加工布から
離間した第２の離間位置へ布押え体を移動させることが
提案されている。この提案によれば、比較的厚い加工布
であっても、布押え体の下側へ容易に着脱することが可
能になる。従来より、この提案においては、布押え体が
第２の離間位置へ移動することに伴い挟持体を解放位置
へ移動させ、上糸に対する挟持力を解放するようにして
いた。In the above-mentioned cloth pressing device, it has been proposed to move the cloth pressing body to a second separated position further separated from the work cloth from the first separated position in accordance with the operation of the operating body. According to this proposal, even a relatively thick work cloth can be easily attached to and detached from the lower side of the cloth pressing body. Conventionally, in this proposal, the holding body is moved to the release position as the cloth pressing body is moved to the second separated position, and the holding force for the upper thread is released.
【０００４】また、「特公昭５７−４８２３７号公報」
に開示されているように、上糸を自動的に切断する糸切
装置を備えたミシンもあり、このようなミシンにおいて
は、糸切りの指示をすると、針が加工布を貫通した状態
で上糸が針板下方でメスによって切断される。そして、
針に繋がる切断された上糸の端部は、切断後に針を加工
布から抜いておいても、加工布に挿通した状態である。
従って、そのような糸切装置を備えるミシンにおいて、
布押え体から加工布を抜き取る作業は、加工布の縫製
後、自動糸切装置によりミシンベッドの下方で上糸を切
断し、布押え体を第２の離間位置へ移動させた状態で行
うことになる。In addition, "Japanese Patent Publication No. 57-48237"
There is also a sewing machine equipped with a thread cutting device that automatically cuts the upper thread, as disclosed in, for example, in such a sewing machine, when a thread cutting instruction is given, the needle is pierced with the needle passing through the work cloth. The thread is cut by a scalpel below the needle plate. And
The end portion of the cut upper thread connected to the needle is in a state of being inserted into the work cloth even if the needle is pulled out from the work cloth after cutting.
Therefore, in a sewing machine equipped with such a thread cutting device,
The work to remove the work cloth from the work clamp should be performed after the work cloth is sewn and the upper thread is cut below the sewing machine bed by the automatic thread cutting device, and the work clamp is moved to the second separated position. become.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来構成においては、押えを上げたのに引続いて加工布の
位置を直したり、加工布を交換するにあたって、上糸に
対する挟持力が解放されているため、上糸が手や加工布
に引掛かり、上糸が上糸供給源（例えば糸駒）から引出
される虞れがあった。しかも、糸駒から針穴に至る糸道
の摺動抵抗より加工布と上糸との間の摺動抵抗が勝り、
加工布を抜き取るに際して、上糸が糸駒から引出される
不具合も危惧されている。However, in the above-mentioned conventional structure, the clamping force for the upper thread is released when the position of the work cloth is continuously corrected or the work cloth is replaced after the presser foot is raised. Therefore, the upper thread may be caught by the hand or the work cloth, and the upper thread may be pulled out from the upper thread supply source (for example, thread spool). Moreover, the sliding resistance between the work cloth and the upper thread is superior to the sliding resistance of the thread path from the thread spool to the needle hole,
There is also a concern that the upper thread may be pulled out from the thread spool when the work cloth is pulled out.
【０００６】本発明は上記事情に鑑みてなされたもので
あり、その目的は、加工布を移動させるにあたって、上
糸が上糸供給源から引出される虞れがないミシンの布押
え装置を提供することである。The present invention has been made in view of the above circumstances, and an object thereof is to provide a cloth pressing device for a sewing machine in which there is no fear that the upper thread will be pulled out from the upper thread supply source when the work cloth is moved. It is to be.
【０００７】[0007]
【課題を解決するための手段】本発明は、操作可能に設
けられた操作体と、この操作体の操作に伴い、加工布を
布載置面と協同して押える布押え位置および加工布から
離間した第１の離間位置へ移動する布押え体と、縫針と
上糸供給源との間に位置する上糸を挟み込む挟持位置お
よび該上糸に対する挟持力を解放する解放位置へ移動可
能に設けられた挟持体とを備え、前記布押え体が布押え
位置へ移動することに伴い前記挟持体を挟持位置へ移動
させ、布押え体が第１の離間位置へ移動することに伴い
挟持体を解放位置へ移動させる構成のミシンの布押え装
置において、前記布押え体を第１の離間位置に移動させ
る操作に引続く前記操作体の操作に伴い、前記挟持体を
挟持位置へ移動させる挟持体移動手段を設けたところに
特徴を有するものである（請求項１）。According to the present invention, there is provided an operating body which is provided so as to be operable, and a work pressing position and a working cloth which press the working cloth in cooperation with the cloth placement surface in accordance with the operation of the operating body. Provided so as to be movable to a cloth pressing body that moves to a first separated position that is separated, a clamping position that clamps the upper thread located between the sewing needle and the upper thread supply source, and a release position that releases the clamping force for the upper thread. The holding body is moved to the holding position as the cloth pressing body moves to the cloth pressing position, and the holding body moves to the first separating position as the holding body moves. In a cloth pressing device for a sewing machine configured to move to a release position, a holding body that moves the holding body to a holding position in accordance with an operation of the operating body following an operation of moving the cloth holding body to a first separated position. Characterized by the provision of moving means There (claim 1).
【０００８】この場合、布押え体を第１の離間位置に移
動させる操作に引続く操作体の操作に伴い、第１の離間
位置より一層布載置面から離間した第２の離間位置へ布
押え体を移動させるようにしても良い（請求項２）。ま
た、挟持体移動手段を、操作体に設けられたカム面と、
このカム面と挟持体との間に設けられ、前記操作体の操
作に伴いカム面に沿って移動することにより挟持体を挟
持位置へ移動させる操作力伝達体とから構成しても良い
（請求項３）。また、上糸を布載置面より下方で切断す
る糸切装置を備えるミシンに用いても良い（請求項
４）。In this case, with the operation of the operating body following the operation of moving the cloth pressing body to the first separated position, the cloth is moved to the second separated position further separated from the cloth placing surface from the first separated position. The pressing body may be moved (claim 2). In addition, the gripping body moving means, a cam surface provided on the operating body,
The operating force transmission body may be provided between the cam surface and the holding body and may move along the cam surface in accordance with the operation of the operating body to move the holding body to the holding position. Item 3). Alternatively, the sewing machine may be used with a thread cutting device that cuts the upper thread below the cloth placement surface (claim 4).
【０００９】[0009]
【作用】請求項１記載の手段によれば、布押え体を第１
の離間位置に移動させる操作に引続いて操作体が操作さ
れると、挟持体が挟持位置へ移動し、上糸を挟み込む。
従って、加工布を移動させるにあたって、加工布と上糸
との間の摺動抵抗より上糸供給源から針穴に至る糸道の
摺動抵抗が大きくなる。According to the first aspect of the present invention, the cloth presser body has the first structure.
When the operating body is operated subsequent to the operation of moving to the separated position, the holding body moves to the holding position and holds the upper thread.
Therefore, when the work cloth is moved, the sliding resistance of the yarn path from the upper thread supply source to the needle hole becomes larger than the sliding resistance between the work cloth and the upper thread.
【００１０】請求項２記載の手段によれば、布押え体が
第２の離間位置へ移動すると、布載置面と布押え体との
間隔が一層広くなり、一層広い空間が布載置面と布押え
体との間に確保される。また、挟持体が挟持位置へ移動
し、上糸を挟み込むので、加工布を移動させるにあたっ
て、加工布と上糸との間の摺動抵抗より上糸供給源から
針穴に至る糸道の摺動抵抗が大きくなる。According to the second aspect of the present invention, when the cloth pressing body moves to the second separated position, the distance between the cloth placing surface and the cloth pressing body becomes wider, and a wider space is formed. It is secured between the and the presser foot. Further, since the nipping body moves to the nipping position and nips the upper thread, when the work cloth is moved, sliding of the thread path from the upper thread supply source to the needle hole is caused by the sliding resistance between the work cloth and the upper thread. Dynamic resistance increases.
【００１１】請求項３記載の手段によれば、カム面に沿
って操作力伝達体を移動させることにより挟持体を挟持
位置へ移動させるといったメカ的手段を採用している。
請求項４記載の手段によれば、加工布に上糸の端部が挿
通されていて、加工布と上糸との摺動抵抗が生じるが、
挟持体が挟持位置へ移動し、上糸を挟み込むので、加工
布を移動させるにあたって、加工布と上糸との間の摺動
抵抗より上糸供給源から針穴に至る糸道の摺動抵抗が大
きくなる。According to the third aspect of the invention, there is adopted a mechanical means for moving the holding body to the holding position by moving the operation force transmitting body along the cam surface.
According to the means of claim 4, the end of the upper thread is inserted through the work cloth, and sliding resistance between the work cloth and the upper thread occurs,
Since the clamp moves to the clamp position and clamps the needle thread, the sliding resistance of the thread path from the needle thread supply source to the needle hole is greater than the sliding resistance between the workpiece cloth and the needle thread when moving the workpiece cloth. Grows larger.
【００１２】[0012]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。尚、矢印Ａ，Ｄ，Ｅは、図２を反矢印Ｃ方向か
ら見た支持軸６ａを中心とする反時計回り方向を示し、
矢印Ｂは、上方から見た段付きねじ１４を中心とする時
計回り方向を示す。An embodiment of the present invention will be described below with reference to the drawings. It should be noted that arrows A, D, and E indicate counterclockwise directions around the support shaft 6a as viewed in the direction of the counter arrow C in FIG.
The arrow B indicates the clockwise direction centered on the stepped screw 14 when viewed from above.
【００１３】図１において、ミシン機枠１には押え棒２
が上下動可能に取付けられ、この押え棒２の下端部に
は、請求項１記載の布押え体に相当する布押え足３が取
付けられている。また、押え棒２の中間部には押え棒抱
き４が固着され、この押え棒２には、ミシン機枠１と押
え棒抱き４との間に位置して押えばね５が遊嵌されてい
る。この押えばね５は圧縮コイルばねからなるものであ
り、押えばね５が押え棒抱き４を下方へ押圧することに
よって押え棒２が下降され、布載置面に相当する針板２
６（図４参照）と協同して加工布を押える布押え位置に
布押え足３が保持される。In FIG. 1, a presser bar 2 is attached to a sewing machine frame 1.
Is attached so as to be movable up and down, and the presser bar 2 has a lower end portion to which a cloth presser foot 3 corresponding to the cloth presser body according to claim 1 is attached. Further, a presser bar retainer 4 is fixed to an intermediate portion of the presser bar 2, and a presser spring 5 is loosely fitted to the presser bar 2 between the sewing machine frame 1 and the presser bar retainer 4. . The presser spring 5 is composed of a compression coil spring, and the presser bar 5 is lowered by the presser spring 5 pressing the presser bar holder 4 downward, so that the needle plate 2 corresponding to the cloth placement surface.
The work clamp foot 3 is held at the work clamp position for pressing the work cloth in cooperation with the work piece 6 (see FIG. 4).
【００１４】ミシン機枠１には、請求項１記載の操作体
に相当する押え上げレバー６が取付けられている。この
押え上げレバー６は支持軸６ａを中心に回動可能にされ
ており、その外周面に第１カム面７が形成されている。
また、押え棒抱き４には、後方へ突出する延長突出部４
ａが形成されている。そして、押え上げレバー６が回動
操作されていない状態では、延長突出部４ａが第１カム
面７に係合しておらず、布押え足３は、押えばね５のば
ね力により、加工布を押える布押え位置に保持されるこ
とになる。A presser foot lifting lever 6 corresponding to the operating body according to the first aspect is attached to the machine frame 1 of the sewing machine. The presser foot lifting lever 6 is rotatable around a support shaft 6a, and a first cam surface 7 is formed on the outer peripheral surface thereof.
In addition, the presser bar hanger 4 has an extension protrusion 4 that protrudes rearward.
a is formed. When the presser foot lifting lever 6 is not rotated, the extension protrusion 4a is not engaged with the first cam surface 7, and the cloth presser foot 3 is pressed by the spring force of the presser spring 5 to form the work cloth. It will be held at the cloth pressing position.
【００１５】第１カム面７には、第１カム領域７ａと第
２カム領域７ｂとが形成されている。そして、押え上げ
レバー６を支持軸６ａを中心に矢印Ａ方向へ回動操作す
ると、第１カム領域７ａが延長突出部４ａに係合し、延
長突出部４ａが第１カム領域７ａに沿って押上げられ、
布押え足３が上方へ移動する。この後、図３の（ｂ）に
示すように、押え上げレバー６の回動軸線αを挟んだ両
側に、延長突出部４ａと第１カム領域７ａとの係合点Ｐ
1 および延長突出部４ａと第２カム領域７ｂとの係合点
Ｐ2 が形成されると、係合点Ｐ1 およびＰ2 の双方に押
えばね５のばね力が下向きに作用し、押え上げレバー６
が均衡状態で保持される。これにより、加工布との間に
隙間が形成された第１の離間位置に布押え足３が保持さ
れることになる。A first cam area 7a and a second cam area 7b are formed on the first cam surface 7. When the presser foot lifting lever 6 is rotated around the support shaft 6a in the direction of arrow A, the first cam region 7a engages with the extension protrusion 4a, and the extension protrusion 4a moves along the first cam region 7a. Pushed up,
The work clamp foot 3 moves upward. After this, as shown in FIG. 3B, the engagement point P between the extension protrusion 4a and the first cam region 7a is provided on both sides of the rotation axis α of the presser foot lifting lever 6.
When the engagement point P2 between the first and extended protrusions 4a and the second cam region 7b is formed, the spring force of the presser spring 5 acts downward on both the engagement points P1 and P2, and the presser foot lifting lever 6 is released.
Are held in equilibrium. As a result, the work clamp foot 3 is held at the first separated position where a gap is formed between the work presser foot and the work cloth.
【００１６】また、押え上げレバー６を図３の（ｃ）に
示す状態まで回動操作すると、延長突出部４ａが第２カ
ム領域７ｂに沿って押上げられ、布押え足３が、加工布
から一層離間した第２の離間位置へ上昇することにな
る。従って、ジーンズ等の幾重にも折重ねられた厚い部
分であっても、布押え足３の下方から容易に抜取ること
が可能になる。When the presser foot lifting lever 6 is rotated to the state shown in FIG. 3 (c), the extension protrusion 4a is pushed up along the second cam area 7b, and the work clamp foot 3 moves to the work cloth. To a second separated position further separated from the position. Therefore, it is possible to easily pull out even from the bottom of the presser foot 3 even in a thick portion such as jeans that is folded in multiple layers.
【００１７】ミシン機枠１には、図２に示すように、段
付きねじ８が固定されている。この段付きねじ８には作
動板９が回動可能に取付けられ、この作動板９の下端部
には延長突出部９ａが形成されている。そして、押え上
げレバー６には、請求項３記載のカム面に相当する第２
カム面１０が形成されており、第２カム面１０には作動
板９の延長突出部９ａが係合されている。この第２カム
面１０は、図３に示すように、第１カム領域１０ａと第
２カム領域１０ｂとを有するものであり（二点鎖線は第
１カム領域１０ａおよび第２カム領域１０ｂの境界を示
す）、布押え足３が布押え位置にある状態では、図３の
（ａ）に示すように、延長突出部９ａが第１カム領域１
０ａの始端部に係合し、図２に示すように、作動板９の
上端部９ｇが垂直な状態に保持されている。A stepped screw 8 is fixed to the machine frame 1 as shown in FIG. An operating plate 9 is rotatably attached to the stepped screw 8, and an extension protrusion 9a is formed at the lower end of the operating plate 9. The presser foot lifting lever 6 has a second surface corresponding to the cam surface of the third aspect.
A cam surface 10 is formed, and an extension protrusion 9a of the operating plate 9 is engaged with the second cam surface 10. As shown in FIG. 3, the second cam surface 10 has a first cam area 10a and a second cam area 10b (the two-dot chain line indicates the boundary between the first cam area 10a and the second cam area 10b). 3A), in a state where the presser foot 3 is in the presser foot position, as shown in (a) of FIG.
0a is engaged with the starting end portion of the working plate 9, and the upper end portion 9g of the operating plate 9 is held vertically as shown in FIG.
【００１８】この状態から、押え上げレバー６が支持軸
６ａを中心に矢印Ａ方向へ回動操作されると、図３の
（ｂ）に示すように、延長突出部９ａが第１カム領域１
０ａに沿って段付きねじ８を中心として、矢印Ｄ方向へ
回動される。そして、延長突出部９ａが水平な状態より
も矢印Ｄ方向へ回動されるに連れて、図２に示すよう
に、作動板９の上端部９ｇが、段付きねじ８を中心に矢
印Ｅ方向へ回動するように構成されている。また、布押
え足３が第１の離間位置に保持されると、図３の（ｂ）
に示すように、延長突出部９ａが第２カム領域１０ｂの
始端部に係合し、作動板９の上端部９ｇが垂直方向から
矢印Ｅ方向に回動した傾斜した状態に保持される。From this state, when the presser foot lifting lever 6 is rotated about the support shaft 6a in the direction of the arrow A, the extension protrusion 9a is moved to the first cam region 1 as shown in FIG. 3 (b).
0a is rotated about the stepped screw 8 in the direction of arrow D. Then, as the extension protrusion 9a is rotated in the arrow D direction from the horizontal state, as shown in FIG. 2, the upper end portion 9g of the operating plate 9 is rotated around the stepped screw 8 in the arrow E direction. It is configured to rotate to. Further, when the presser foot 3 is held at the first separated position, (b) in FIG.
As shown in, the extension protrusion 9a engages with the starting end of the second cam region 10b, and the upper end 9g of the actuating plate 9 is held in an inclined state rotated from the vertical direction in the arrow E direction.
【００１９】この状態から、押え上げレバー６がさらに
支持軸６ａを中心に矢印Ａ方向へ回動操作されると、延
長突出部９ａが第２カム領域１０ｂに沿って、段付きね
じ８を中心にして反矢印Ｄ方向へ回動され、図２に示す
ように、作動板９の上端部９ｇが、段付きねじ８を中心
に反矢印Ｅ方向へ回動する。そして、図３の（ｃ）に示
す状態まで押え上げレバー６が回動されると、布押え足
３が第２の離間位置に移動し、延長突出部９ａが第２カ
ム領域１０ｂの終端部に係合し、図３の（ａ）に示す状
態と同様に、延長突出部９ａが水平な状態になるので、
作動板９の上端部９ｇが垂直な状態に復帰する。From this state, when the presser foot lifting lever 6 is further rotated around the support shaft 6a in the direction of the arrow A, the extension protrusion 9a moves the stepped screw 8 along the second cam region 10b. Then, as shown in FIG. 2, the upper end portion 9g of the operating plate 9 rotates in the direction opposite to the arrow E centering on the stepped screw 8. Then, when the presser foot lifting lever 6 is rotated to the state shown in FIG. 3 (c), the work clamp foot 3 moves to the second separated position, and the extended protrusion 9a causes the end portion of the second cam region 10b to end. And the extension protrusion 9a becomes horizontal as in the state shown in FIG. 3 (a).
The upper end 9g of the operating plate 9 returns to the vertical state.
【００２０】作動板９の上端部９ｇには、図２に示すよ
うに、縦長な長孔９ｂが形成され、この長孔９ｂ内には
二股レバー１１の一方の腕１１ａが係合されている。ま
た、ミシン機枠１には、ねじ１２によりブラケット１３
が固定されており、二股レバー１１は、段付きねじ１４
によりブラケット１３の上面に回動可能に支持されてい
る。従って、布押え足３が布押え位置および第２の離間
位置にあり、作動板９の上端部９ｇが垂直な状態にある
場合、二股レバー１１の他方の腕１１ｂは、同図に示す
ように、矢印Ｂ方向側に寄って位置している。また、布
押え足３が第１の離間位置にあり、作動板９の上端部９
ｇが垂直方向から矢印Ｅ方向へ回動して傾斜している場
合、二股レバー１１の他方の腕１１ｂは、段付きねじ１
４を中心に反矢印Ｂ方向へ回動した状態になる。As shown in FIG. 2, a vertically long slot 9b is formed in the upper end 9g of the operating plate 9, and one arm 11a of the bifurcated lever 11 is engaged in the slot 9b. . In addition, the sewing machine frame 1 is provided with a bracket 13 by means of screws 12.
Is fixed, and the forked lever 11 has a stepped screw 14
Is rotatably supported on the upper surface of the bracket 13. Therefore, when the presser foot 3 is at the presser foot position and the second separated position and the upper end portion 9g of the operating plate 9 is in the vertical state, the other arm 11b of the bifurcated lever 11 moves as shown in FIG. , Is located closer to the arrow B direction side. Further, the work clamp foot 3 is at the first separated position, and the upper end portion 9 of the operating plate 9 is
When g is tilted by rotating from the vertical direction in the direction of arrow E, the other arm 11b of the bifurcated lever 11 has the stepped screw 1
4 is rotated in the direction opposite to the arrow B.
【００２１】ブラケット１３には支持ピン１３ａが突設
され、この支持ピン１３ａには調節板１５の横長な長孔
１５ａが挿入されている。また、ミシン機枠１には支持
軸１６が固定され、この支持軸１６には調節板１５の折
曲部１５ｂが挿入されている。この調節板１５は、作動
板９と共に請求項３記載の操作力伝達体１７を構成する
ものであり、二股レバー１１の他方の腕１１ｂに係合さ
れている。そして、他方の腕１１ｂが矢印Ｂ方向へ回動
している場合、調節板１５は矢印Ｃ方向に移動し、ま
た、他方の腕１１ｂが反矢印Ｂ方向へ回動している場
合、支持軸１６に沿って反矢印Ｃ方向へ移動する。A support pin 13a is provided on the bracket 13 in a protruding manner, and a horizontally long slot 15a of the adjusting plate 15 is inserted into the support pin 13a. A support shaft 16 is fixed to the sewing machine frame 1, and a bent portion 15b of the adjusting plate 15 is inserted into the support shaft 16. The adjusting plate 15 constitutes the operating force transmitting body 17 according to the third aspect together with the operating plate 9, and is engaged with the other arm 11b of the bifurcated lever 11. When the other arm 11b is rotating in the arrow B direction, the adjusting plate 15 moves in the arrow C direction, and when the other arm 11b is rotating in the counter arrow B direction, the support shaft 15b is rotated. Move in the direction of arrow C along 16.
【００２２】ブラケット１３の支持ピン１３ａには、調
節板１８の横長な長孔１８ａが挿入されている。この調
節板１８には折曲部１８ｂが形成され、この折曲部１８
ｂは支持軸１６に挿入されている。また、ブラケット１
３の支持ピン１３ａには操作ダイアル１９が回動可能に
支持されている。そして、調節板１８には係合ピン１８
ｃが突設され、この係合ピン１８ｃは操作ダイアル１９
に係合されている。従って、操作ダイアル１９を回動操
作すると、調節板１８が支持軸１６に沿う矢印Ｃおよび
反矢印Ｃ方向へスライドし、調節板１８の位置調整が行
われる。A horizontally elongated hole 18a of the adjusting plate 18 is inserted into the support pin 13a of the bracket 13. A bent portion 18b is formed on the adjusting plate 18, and the bent portion 18b is formed.
b is inserted in the support shaft 16. Also, the bracket 1
An operation dial 19 is rotatably supported on the third support pin 13a. The adjusting plate 18 has an engaging pin 18
c is projected, and the engagement pin 18c is provided with an operation dial 19c.
Is engaged. Therefore, when the operation dial 19 is rotated, the adjusting plate 18 slides in the directions of the arrow C and the counter arrow C along the support shaft 16, and the position of the adjusting plate 18 is adjusted.
【００２３】支持軸１６には、調節板１５の折曲部１５
ｂと調節板１８の折曲部１８ｂとの間に位置して、ばね
座金２０および圧縮コイルばね２１が挿入されており、
この圧縮コイルばね２１は、ばね座金２０を介して調節
板１５の折曲部１５ｂを矢印Ｃ方向へ押圧している。ま
た、支持軸１６には、請求項１記載の挟持体に相当する
一対の調子皿２２ａおよび２２ｂが移動可能に嵌合さ
れ、これら調子皿２２ａおよび２２ｂ間には、請求項１
記載の上糸供給源に相当する糸駒（図示せず）より引出
された上糸（図示せず）が挿通されている。The support shaft 16 includes a bent portion 15 of the adjusting plate 15.
The spring washer 20 and the compression coil spring 21 are inserted between b and the bent portion 18b of the adjusting plate 18,
The compression coil spring 21 presses the bent portion 15b of the adjusting plate 15 in the arrow C direction via the spring washer 20. Further, a pair of tone plates 22a and 22b corresponding to the sandwiching body according to claim 1 is movably fitted to the support shaft 16, and a pair of tone plates 22a and 22b are provided between the tone plates 22a and 22b.
An upper thread (not shown) pulled out from a thread spool (not shown) corresponding to the above described upper thread supply source is inserted.
【００２４】従って、図２に示すように、押え上げレバ
ー６が非回動状態にあり、布押え足３が布押え位置にあ
る場合、作動板９の上端部９ｇが垂直状態に保持され、
二股レバー１１の他方の腕１１ｂが矢印Ｂ方向寄りに位
置し、調節板１５が矢印Ｃ方向へ位置し、調節板１５の
折曲部１５ｂが圧縮コイルばね２１のばね力により調子
皿２２ａを押圧し、調子皿２２ａが挟持位置（矢印Ｃ方
向）に位置している。このため、上糸は、調子皿２２ａ
および２２ｂにより挟持され、操作ダイアル１９を回動
操作すると、調節板１８が移動して圧縮コイルばね２１
が伸縮し、調子皿２２ａに対する押圧力が変化し、上糸
に対する挟持力が調整される。Therefore, as shown in FIG. 2, when the presser foot lifting lever 6 is in the non-rotating state and the presser foot 3 is in the presser foot position, the upper end portion 9g of the operating plate 9 is held in the vertical state,
The other arm 11b of the bifurcated lever 11 is located closer to the direction of arrow B, the adjusting plate 15 is located in the direction of arrow C, and the bent portion 15b of the adjusting plate 15 presses the adjusting disc 22a by the spring force of the compression coil spring 21. However, the tone plate 22a is located at the holding position (direction of arrow C). For this reason, the needle thread is the tension plate 22a.
When the operation dial 19 is rotated by being clamped by the compression coil springs 21 and 22b, the adjusting plate 18 moves to move the compression coil spring 21.
Expands and contracts, the pressing force on the tension disc 22a changes, and the clamping force for the upper thread is adjusted.
【００２５】尚、本実施例のミシンは、「特公昭５７−
４８２３７号公報」に開示されているように、上糸を自
動的に切断する糸切装置２３を備えており（図４参
照）、糸切ボタン２４により糸切りの指示をすると、縫
針２５が加工布を貫通した状態で上糸が針板２６の下方
でメスによって切断されるように構成されている。ま
た、上糸の切断後、縫針２５に繋がる上糸の端部は、縫
針２５を加工布から抜いても、加工布に挿通した状態に
なっている。The sewing machine of the present embodiment is "Japanese Patent Publication No.
As disclosed in Japanese Patent Publication No. 48237), a thread cutting device 23 that automatically cuts a needle thread is provided (see FIG. 4). When a thread cutting instruction is given by a thread cutting button 24, the sewing needle 25 is processed. The upper thread is configured to be cut by a knife below the needle plate 26 while penetrating the cloth. Further, after the upper thread is cut, the end of the upper thread connected to the sewing needle 25 is in a state of being inserted into the work cloth even if the sewing needle 25 is pulled out from the work cloth.
【００２６】次に上記構成の作用について説明する。押
え上げレバー６を矢印Ａ方向へ回動操作すると、布押え
足３が上昇し、布押え足３と加工布との間に隙間が形成
され、布押え足３が第１の離間位置に保持される。これ
と共に、作動板９の上端部９ｇが垂直方向から矢印Ｅ方
向へ回動して傾斜し、二股レバー１１の他方の腕１１ｂ
が反矢印Ｂ方向へ回動し、調節板１５が圧縮コイルばね
２１の弾性力に抗して反矢印Ｃ方向へスライドし、調節
板１５の折曲部１５ｂにより圧縮コイルばね２１のばね
力が受けられる。このため、調子皿２２ａに対して圧縮
コイルばね２１のばね力が作用しなくなり、調子皿２２
ａから上糸に対して作用していた挟持力が解放される。Next, the operation of the above configuration will be described. When the presser foot lifting lever 6 is rotated in the direction of arrow A, the work clamp foot 3 rises, a gap is formed between the work clamp foot 3 and the work cloth, and the work clamp foot 3 is held at the first separated position. To be done. At the same time, the upper end 9g of the operating plate 9 pivots in the direction of arrow E from the vertical direction and tilts, and the other arm 11b of the bifurcated lever 11 extends.
Rotates in the direction opposite to the arrow B, the adjusting plate 15 slides in the direction opposite to the arrow C against the elastic force of the compression coil spring 21, and the bent portion 15b of the adjusting plate 15 causes the spring force of the compression coil spring 21 to rise. Can be received. Therefore, the spring force of the compression coil spring 21 does not act on the tone tray 22a, and the tone tray 22a
The clamping force acting on the upper thread from a is released.
【００２７】この状態から、押え上げレバー６をさらに
矢印Ａ方向へ回動操作すると、布押え足３が上昇し、布
押え足３と加工布との間の隙間が大きくなる。そして、
布押え足３が第２の離間位置まで上昇すると、作動板９
の上端部９ｇが垂直状態に復帰する。従って、布押え足
３が布押え位置にある場合と同様、二股レバー１１の他
方の腕１１ｂが段付きねじ１４を中心に矢印Ｂ方向へ回
動し、調節板１５が矢印Ｃ方向へスライドし、調節板１
５の折曲部１５ｂが圧縮コイルばね２１のばね力により
調子皿２２ａを押圧し、調子皿２２ａが挟持位置へ移動
する。このため、上糸が調子皿２２ａおよび２２ｂによ
り挟持される。From this state, when the presser foot lifting lever 6 is further rotated in the direction of arrow A, the work clamp foot 3 rises, and the gap between the work clamp foot 3 and the work cloth increases. And
When the work clamp foot 3 rises to the second separated position, the operating plate 9
The upper end portion 9g of is returned to the vertical state. Therefore, as in the case where the presser foot 3 is in the presser foot position, the other arm 11b of the bifurcated lever 11 rotates about the stepped screw 14 in the arrow B direction, and the adjustment plate 15 slides in the arrow C direction. , Adjusting plate 1
The bent portion 15b of No. 5 presses the tension tray 22a by the spring force of the compression coil spring 21, and the tension tray 22a moves to the holding position. Therefore, the upper thread is clamped by the tension discs 22a and 22b.
【００２８】上記実施例によれば、第１の離間位置にあ
る布押え足３を第２の離間位置まで上昇させると、調子
皿２２ａに対して圧縮コイルばね２１のばね力が作用
し、調子皿２２ａおよび２２ｂにより上糸が挟み込まれ
るように構成した。このため、布押え足３を第２の離間
位置へ上昇させて加工布を抜き取る際に、加工布と上糸
との間の摺動抵抗より糸駒から針穴に至る糸道の摺動抵
抗が大きくなり、上糸が糸駒から引出されることが防止
される。また、布押え足３を第２の離間位置へ移動さ
せ、厚い加工布や何枚も重ねた加工布をミシンに装着す
る場合、ミシンに加工布を装着するのに手間取り、その
最中に、上糸が手や加工布に引掛かっても、調子皿２２
ａおよび２２ｂが上糸を挟み込んでいるので、上糸が糸
駒から引出されることが防止される。According to the above-described embodiment, when the presser foot 3 in the first separated position is raised to the second separated position, the spring force of the compression coil spring 21 acts on the adjusting disc 22a, and the adjusting tension is increased. The upper thread is sandwiched between the dishes 22a and 22b. Therefore, when the work clamp foot 3 is raised to the second separated position and the work cloth is pulled out, the sliding resistance of the yarn path from the thread spool to the needle hole is increased by the sliding resistance between the work cloth and the upper thread. It becomes large and the upper thread is prevented from being pulled out from the thread spool. In addition, when the work clamp foot 3 is moved to the second separated position and a thick work cloth or a work cloth having a number of stacked layers is attached to the sewing machine, it takes time to attach the work cloth to the sewing machine, and during that, Even if the needle thread is caught on the hand or the work cloth, the tone plate 22
Since a and 22b sandwich the upper thread, the upper thread is prevented from being pulled out from the thread spool.
【００２９】また、第２カム面１０に沿って作動板９お
よび調節板１５を移動させることにより調子皿２２ａを
挟持位置へ移動させるといったメカ的手段を採用してい
るので、例えば、布押え足３が第２の離間位置へ移動し
たことを電気的に検出し、その電気信号に基づいてソレ
ノイド等を駆動させることにより調子皿２２ａを挟持位
置へ移動させるといった電気的手段を採用する場合に比
べて構成が簡単になり、コストダウンを図り得る。Further, since mechanical means such as moving the operating plate 9 and the adjusting plate 15 along the second cam surface 10 to move the tone tray 22a to the holding position is employed, for example, the work clamp foot is used. Compared with the case of adopting an electric means for electrically detecting that 3 has moved to the second separated position and driving the solenoid or the like based on the electric signal to move the tone tray 22a to the holding position. This simplifies the configuration and reduces costs.
【００３０】また、糸切装置をミシンが備えており、厚
い加工布や何枚も重なった加工布を縫った後に、上糸を
切断して加工布を取出すときに、加工布に多くの糸が挿
通して、加工布と上糸との摺動抵抗が比較的大きい場合
においても、加工布の取出しに際して布押え足３を第２
の離間位置へ移動させ、調子皿２２ａおよび２２ｂが上
糸を挟み込んでいるので、加工布の取出しに伴って上糸
が糸駒から引出されることが防止される。そして、調子
皿２２ａおよび２２ｂを挟持位置へ移動させる操作が、
押えを上げる方向と同一方向であるので、押え上げレバ
ー６の操作を行い易いという利点もある。In addition, the sewing machine is equipped with a thread cutting device, and after sewing a thick work cloth or a work cloth having a plurality of layers stacked thereon and then cutting the upper thread to take out the work cloth, a large number of threads are added to the work cloth. Even if the sliding resistance between the work cloth and the needle thread is relatively large when the work cloth is inserted, the work clamp foot 3 is moved to the second position when the work cloth is taken out.
Since the upper tray and the tension discs 22a and 22b sandwich the upper thread, the upper thread is prevented from being pulled out from the thread spool when the work cloth is taken out. Then, the operation of moving the tone plates 22a and 22b to the holding position is
Since it is in the same direction as the presser foot lifting direction, there is an advantage that the presser foot lifting lever 6 can be easily operated.
【００３１】尚、上記実施例においては、布押え足３が
第１の離間位置にある状態で押え上げレバー６を操作す
ると、布押え足３が第２の離間位置へ移動し、調子皿２
２ａおよび２２ｂにより上糸が挟持されるように構成し
たが、これに限定されるものではない。例えば、押え上
げレバー６をさらに操作すると、布押え足３が第１の離
間位置に保持され、調子皿２２ａおよび２２ｂが上糸を
挟持するように構成しても良い。この場合、押え上げレ
バー６の第１カム面７´の形状は図５に示すようにな
る。In the above embodiment, when the presser foot lifting lever 6 is operated while the work clamp foot 3 is in the first separated position, the work clamp foot 3 is moved to the second separated position and the tone tray 2
Although the upper thread is sandwiched between 2a and 22b, the present invention is not limited to this. For example, when the presser foot lifting lever 6 is further operated, the cloth presser foot 3 may be held at the first separated position so that the tension plates 22a and 22b hold the upper thread. In this case, the shape of the first cam surface 7'of the presser foot lifting lever 6 is as shown in FIG.
【００３２】また、上記実施例においては、第２カム面
１０と作動板９と調節板１５といったメカ的手段により
調子皿２２ａを挟持位置へ移動させる構成としたが、こ
れに限定されるものではなく、電気的な構成により調子
皿２２ａを移動させても良い。この一例として、布押え
足３が第２の離間位置に達することに基づいて駆動開始
指令を出力し、この駆動開始指令によりソレノイドやシ
リンダー等を作動させ、調子皿２２ａを移動させる構成
があげられる。Further, in the above embodiment, the adjusting tray 22a is moved to the holding position by the mechanical means such as the second cam surface 10, the operating plate 9 and the adjusting plate 15. However, the present invention is not limited to this. Instead, the tone tray 22a may be moved by an electrical configuration. As one example of this, there is a configuration in which a drive start command is output based on the presser foot 3 reaching the second separated position, and a solenoid, a cylinder or the like is operated by this drive start command to move the tone tray 22a. .
【００３３】[0033]
【発明の効果】以上の説明から明らかなように、本発明
のミシンの布押え装置によれば次のような優れた効果を
奏する。請求項１記載の手段によれば、布押え体が第１
の離間位置へ移動した後、引続き操作体を操作すると、
挟持体が挟持位置へ移動するので、加工布を移動させる
にあたって、加工布と上糸との間の摺動抵抗より上糸供
給源から針穴に至る糸道の摺動抵抗が大きくなる。その
結果、上糸が上糸供給源から引出されることが防止され
る。As is apparent from the above description, the cloth presser device for a sewing machine of the present invention has the following excellent effects. According to the means of claim 1, the cloth pressing body is the first
After moving to the separated position of, if you continue to operate the operating body,
Since the holding body moves to the holding position, when the work cloth is moved, the sliding resistance of the yarn path from the upper thread supply source to the needle hole becomes larger than the sliding resistance between the work cloth and the upper thread. As a result, the upper thread is prevented from being pulled out from the upper thread supply source.
【００３４】請求項２記載の手段によれば、上記効果に
加えて、布押え体を第２の離間位置へ移動させると、挟
持体が挟持位置へ移動するので、布載置面と布押え体と
の空間を一層広くしており、厚い加工布や重ねた加工布
を載置し易くなる。請求項３記載の手段によれば、カム
面および操作力伝達体といったメカ的手段により、挟持
体を挟持位置へ移動させることができるので、構成が簡
単化され、装置がコストダウンされる。請求項４記載の
手段によれば、加工布と上糸との間の摺動抵抗より上糸
供給源から針穴に至る糸道の摺動抵抗が大きいので、糸
切り後に加工布を移動させても、上糸が上糸供給源から
引出されることが防止される。According to the means of claim 2, in addition to the above effect, when the cloth pressing body is moved to the second separated position, the holding body moves to the holding position, so that the cloth placing surface and the cloth pressing body are moved. The space between the body and the body is made wider, making it easier to place thick work cloths or stacked work cloths. According to the means described in claim 3, since the holding body can be moved to the holding position by the mechanical means such as the cam surface and the operation force transmitting body, the structure is simplified and the cost of the apparatus is reduced. According to the means of claim 4, since the sliding resistance of the yarn path from the upper thread supply source to the needle hole is larger than the sliding resistance between the work cloth and the upper thread, the work cloth is moved after thread cutting. However, the upper thread is prevented from being pulled out from the upper thread supply source.
【図１】本発明の一実施例を示す要部の拡大図である。FIG. 1 is an enlarged view of a main part showing an embodiment of the present invention.
【図２】要部の斜視図である。FIG. 2 is a perspective view of a main part.
【図３】押え上げレバーの延長突出部および作動板の延
長突出部とカム面との係合状態を示す図である。FIG. 3 is a diagram showing a state in which the extended protrusion of the presser foot lifting lever and the extended protrusion of the actuation plate are engaged with the cam surface.
【図４】ミシンの全体構成を示す図である。FIG. 4 is a diagram showing an overall configuration of a sewing machine.
【図５】変形例を示す図１相当図である。FIG. 5 is a view corresponding to FIG. 1 showing a modified example.
３は布押え足（布押え体）、６は押え上げレバー（操作
体）、１０は第２カム面（カム面）、１７は操作力伝達
体、２２ａおよび２２ｂは調子皿（挟持体）、２３は糸
切装置、２５は縫針、２６は針板（布載置面）を示す。3 is a cloth presser foot (cloth presser body), 6 is a presser foot lifting lever (operating body), 10 is a second cam surface (cam surface), 17 is an operating force transmitting body, 22a and 22b are tone plates (holding body), Reference numeral 23 is a thread cutting device, 25 is a sewing needle, and 26 is a needle plate (cloth mounting surface).
Claims (4)
押える布押え位置および加工布から離間した第１の離間
位置へ移動する布押え体と、 縫針と上糸供給源との間に位置する上糸を挟み込む挟持
位置および該上糸に対する挟持力を解放する解放位置へ
移動可能に設けられた挟持体とを備え、 前記布押え体が布押え位置へ移動することに伴い前記挟
持体を挟持位置へ移動させ、布押え体が第１の離間位置
へ移動することに伴い挟持体を解放位置へ移動させる構
成のものにおいて、 前記布押え体を第１の離間位置に移動させる操作に引続
く前記操作体の操作に伴い、前記挟持体を挟持位置へ移
動させる挟持体移動手段を設けたことを特徴とするミシ
ンの布押え装置。1. An operation body provided so as to be operable, and a cloth pressing position for pressing a work cloth in cooperation with a cloth placement surface in accordance with the operation of the operation body and a first separated position separated from the work cloth. A movable presser body, a clamping position for clamping the upper thread located between the sewing needle and the upper thread supply source, and a clamping body movably provided to a release position for releasing the clamping force for the upper thread, A configuration in which the holding body is moved to the holding position when the work pressing body moves to the work holding position, and the holding body is moved to the release position when the work pressing body moves to the first separated position. In the sewing machine, a holding body moving means for moving the holding body to the holding position is provided in accordance with the operation of the operating body following the operation of moving the cloth pressing body to the first separated position. Presser foot device.
置に移動させる操作に引続く操作体の操作に伴い、第１
の離間位置より一層布載置面から離間した第２の離間位
置へ移動することを特徴とする請求項１記載のミシンの
布押え装置。2. The cloth pressing body is configured to move the first pressing member with the operation of the operating body following the operation of moving the cloth pressing member to the first separated position.
2. The cloth pressing device for a sewing machine according to claim 1, wherein the cloth pressing device moves to a second separated position further separated from the cloth mounting surface from the separated position.
作に伴いカム面に沿って移動することにより挟持体を挟
持位置へ移動させる操作力伝達体とから構成されている
ことを特徴とする請求項１または２記載のミシンの布押
え装置。3. The holding body moving means is provided between the cam surface provided on the operating body and between the cam surface and the holding body, and moves along the cam surface as the operating body is operated. 3. The cloth pressing device for a sewing machine according to claim 1 or 2, further comprising an operating force transmission body that moves the holding body to a holding position.
装置を備えるミシンに用いられたことを特徴とする請求
項１ないし３のいずれかに記載のミシンの布押え装置。4. The cloth pressing device for a sewing machine according to claim 1, wherein the cloth pressing device is used in a sewing machine having a thread cutting device that cuts an upper thread below a cloth placement surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19519694A JPH0857174A (en) | 1994-08-19 | 1994-08-19 | Holding device of cloth in sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19519694A JPH0857174A (en) | 1994-08-19 | 1994-08-19 | Holding device of cloth in sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0857174A true JPH0857174A (en) | 1996-03-05 |
Family
ID=16337056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19519694A Pending JPH0857174A (en) | 1994-08-19 | 1994-08-19 | Holding device of cloth in sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0857174A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325501B2 (en) | 2006-03-02 | 2008-02-05 | Brother Kogyo Kabushiki Kaisha | Presser foot lifting lever for sewing machine and sewing machine |
| US7958834B2 (en) | 2007-11-19 | 2011-06-14 | Brother Kogyo Kabushiki Kaisha | Template for use in circular sewing |
| US7958833B2 (en) | 2007-11-01 | 2011-06-14 | Brother Kogyo Kabushiki Kaisha | Presser foot device for sewing machine and sewing machine provided therewith |
| EP2390396A1 (en) * | 2010-05-28 | 2011-11-30 | Aisin Seiki Kabushiki Kaisha | Sewing machine |
| JP2019208806A (en) * | 2018-06-04 | 2019-12-12 | 蛇の目ミシン工業株式会社 | sewing machine |
-
1994
- 1994-08-19 JP JP19519694A patent/JPH0857174A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325501B2 (en) | 2006-03-02 | 2008-02-05 | Brother Kogyo Kabushiki Kaisha | Presser foot lifting lever for sewing machine and sewing machine |
| US7958833B2 (en) | 2007-11-01 | 2011-06-14 | Brother Kogyo Kabushiki Kaisha | Presser foot device for sewing machine and sewing machine provided therewith |
| US7958834B2 (en) | 2007-11-19 | 2011-06-14 | Brother Kogyo Kabushiki Kaisha | Template for use in circular sewing |
| EP2390396A1 (en) * | 2010-05-28 | 2011-11-30 | Aisin Seiki Kabushiki Kaisha | Sewing machine |
| JP2011245110A (en) * | 2010-05-28 | 2011-12-08 | Aisin Seiki Co Ltd | Sewing machine |
| JP2019208806A (en) * | 2018-06-04 | 2019-12-12 | 蛇の目ミシン工業株式会社 | sewing machine |
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