JPH08103588A - Sewing machine - Google Patents
Sewing machineInfo
- Publication number
- JPH08103588A JPH08103588A JP23892594A JP23892594A JPH08103588A JP H08103588 A JPH08103588 A JP H08103588A JP 23892594 A JP23892594 A JP 23892594A JP 23892594 A JP23892594 A JP 23892594A JP H08103588 A JPH08103588 A JP H08103588A
- Authority
- JP
- Japan
- Prior art keywords
- needle
- thread
- needle thread
- balance
- cloth
- 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、針糸を伴い上下動する
針と、その針の上下動に対応して針糸を捕捉するルーパ
ーと、針糸を狭持する糸調子手段と、針と糸調子手段と
の間に配置されると共に、針の運動に対応して移動され
る針糸天秤とを有するミシンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle that moves up and down with a needle thread, a looper that captures the needle thread in response to the vertical movement of the needle thread, a thread tensioning means that holds the needle thread, and a needle. The present invention relates to a sewing machine having a needle thread balance, which is arranged between the thread tension means and a thread tension means and is moved in response to the movement of the needle.
【０００２】[0002]
【従来の技術】従来より、そのようなミシンにおいて
は、針を上下動するクランクに、図３に示すように、金
属の板などで作成された剛体の針糸天秤が固定され、針
の上下動に対応して移動される。更に、針糸は糸調子皿
に挟まれており、針糸の移動が規制されている。そし
て、針とルーパーとが協働して縫目を形成する際に、針
の下降に伴い、針糸天秤が糸調子皿に抗じて針糸を糸駒
から引出すことと、針が最下点に下降して糸駒から糸を
引き出すことによって、縫目形成のための針糸を確保す
る。また、針の上昇に伴い、針糸天秤は、針糸を移動し
針糸のゆるみを吸収するように構成されている。剛体の
針糸天秤は一定に移動されるので、画一的な針糸の引出
しや針糸のゆるみ吸収が針糸天秤によって行なわれる。2. Description of the Related Art Conventionally, in such a sewing machine, as shown in FIG. 3, a rigid needle thread balance made of a metal plate or the like is fixed to a crank that moves the needle up and down, and the needle is moved up and down. Moved in response to the movement. Further, the needle thread is sandwiched between thread tension discs, and movement of the needle thread is restricted. When the needle and the looper cooperate to form a stitch, the needle thread balance pulls out the needle thread from the thread spool against the thread tension disc as the needle descends, and The needle thread for forming the stitch is secured by descending to the point and pulling out the thread from the thread spool. The needle thread balance is configured to move the needle thread and absorb looseness of the needle thread as the needle is raised. Since the rigid needle thread balance is constantly moved, uniform needle thread drawing and needle thread looseness absorption are performed by the needle thread balance.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、剛体の
針糸天秤では、針糸の引出し量や吸収されるゆるみ量が
針糸天秤の形状によって一定に決定されてしまう。従っ
て、針糸の消費量が布厚や布質（硬さや伸縮性）によっ
て様々に変化すると、上述したような画一的な針糸の引
出しやゆるみの吸収では、良好な縫製ができない恐れが
ある。例えば、平均的な布厚を想定して針糸天秤の形状
が形成されていて、想定している布より薄い布を縫う場
合、縫目で消費される糸量は少なくてすむので、針糸が
余りその糸を針が引っ掛けてしまう恐れがある。また、
想定している布より厚い布を縫う場合、縫目で消費され
る糸量は多いので、針と糸調子皿との間の針糸が想定さ
れているよりも張り、縫目が突っ張ってしまうという問
題点があった。However, with a rigid needle thread balance, the amount of needle thread pulled out and the amount of looseness absorbed are fixedly determined by the shape of the needle thread balance. Therefore, if the consumption of the needle thread varies depending on the cloth thickness and cloth quality (hardness and stretchability), it is possible that good sewing cannot be performed with the above-described uniform needle thread drawing and looseness absorption. is there. For example, if the shape of the needle thread balance is formed assuming an average cloth thickness and a cloth thinner than the assumed cloth is sewn, the amount of thread consumed at the seam can be small, so the needle thread There is a danger that the needle will catch the thread too much. Also,
If you sew a thicker cloth than you expect, the amount of thread consumed at the seam is large, so the needle thread between the needle and the tension plate is tighter than expected and the seam is stretched. There was a problem.
【０００４】本発明は、上述した問題点を解決するため
になされたものであり、布厚や布質に関わらず良好な縫
製を行うことにある。The present invention has been made to solve the above-mentioned problems, and is to perform good sewing regardless of cloth thickness and cloth quality.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
に本発明の請求項１記載のミシンは、針と糸調子手段と
の間の針糸に関連して変形する弾性体を有する針糸天秤
を備えている。To achieve this object, a sewing machine according to claim 1 of the present invention has a needle thread having an elastic body which deforms in relation to the needle thread between the needle and the thread tension means. Equipped with a balance.
【０００６】また、請求項２記載のミシンは、線状の弾
性体によって構成されている針糸天秤を備えている。A sewing machine according to a second aspect of the present invention includes a needle thread balance made of a linear elastic body.
【０００７】[0007]
【作用】上記の構成を有する本発明の請求項１記載のミ
シンにおいては、針糸天秤の弾性体の変形によって、針
と糸調子手段との間の針糸のたわみや張りが適宜吸収さ
れる。In the sewing machine having the above-mentioned structure according to the first aspect of the present invention, the deflection and tension of the needle thread between the needle and the thread tension means are appropriately absorbed by the deformation of the elastic body of the needle thread balance. .
【０００８】また、請求項２記載のミシンにおいては、
針糸天秤自体が弾性変形して、針と糸調子手段との間の
針糸のたわみや張りが適宜吸収される。Further, in the sewing machine according to claim 2,
The needle thread balance itself is elastically deformed to appropriately absorb the bending and tension of the needle thread between the needle and the thread tensioning means.
【０００９】[0009]
【実施例】以下、本発明を具体化した一実施例を図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１０】図１に示すように、針１０を取り付けられ
た針棒１２は、支持機構（図略）により上下動可能に支
持されている。この針棒１２の中央には、針棒抱き１４
を介して針棒クランク１６の一端が回動可能に連結され
ている。この針棒クランク１６の他端は、揺動回転され
る針棒駆動腕１８に回動可能に連結されている。そし
て、針棒駆動腕１８が揺動回転されると、針棒１２が針
棒クランク１６の回動によって上下動するように構成さ
れている。この針棒クランク１６には、弾性を有する針
金で構成されている針糸天秤２０がネジ２１よって立設
して取り付けられている（図２参照）。この針糸天秤２
０は円弧を描くように形成され、図２に示すように弾性
変形可能である。As shown in FIG. 1, a needle bar 12 having a needle 10 attached thereto is supported by a support mechanism (not shown) so as to be vertically movable. At the center of the needle bar 12, a needle bar holder 14
One end of the needle bar crank 16 is rotatably connected via. The other end of the needle bar crank 16 is rotatably connected to a needle bar drive arm 18 that is pivotally rotated. When the needle bar drive arm 18 is pivotally rotated, the needle bar 12 is vertically moved by the rotation of the needle bar crank 16. On the needle bar crank 16, a needle thread balance 20 made of elastic wire is erected by a screw 21 (see FIG. 2). This needle thread balance 2
0 is formed so as to draw an arc and is elastically deformable as shown in FIG.
【００１１】更に、針棒クランク１６の回動範囲の近傍
には、一対の糸案内２２がミシンフレーム（図略）に固
定され、針棒クランク１６が回動すると、針糸天秤２０
が一対の糸案内２２の間を横切るように配置されてい
る。また、針棒クランク１６の上方には、糸調子皿２４
が配置されており、糸供給源の糸駒（図略）から引き出
された針糸２５を狭持し、針糸２５の位置を規制するよ
うに構成されている。糸駒からの針糸２５は、糸調子皿
２４を経て両糸案内２２に挿通された後に、針１０に挿
通されるように構成されている。この糸調子皿による狭
持圧は、操作部材（図略）により任意に調整可能であ
る。Further, a pair of thread guides 22 are fixed to a sewing machine frame (not shown) in the vicinity of the rotation range of the needle bar crank 16, and when the needle bar crank 16 rotates, the needle thread balance 20.
Are arranged so as to cross between the pair of thread guides 22. Further, above the needle bar crank 16, the thread tension disc 24
Is arranged, and the needle thread 25 pulled out from the thread spool (not shown) of the thread supply source is sandwiched and the position of the needle thread 25 is regulated. The needle thread 25 from the thread spool is configured to be inserted into the thread guide 22 through the thread tension disc 24 and then the needle 10. The holding pressure by the thread tension disc can be arbitrarily adjusted by an operating member (not shown).
【００１２】また、針１０の下方の針板２６の下方に
は、針１０と協働する上ルーパー３０及び下ルーパー３
２、並びに、布送り機構（図略）が配置されており、針
１０や両ルーパーの３０、３２の運動に対応して、縫目
を形成するように構成されている。Below the needle plate 26 below the needle 10, an upper looper 30 and a lower looper 3 which cooperate with the needle 10 are provided.
2 and a cloth feeding mechanism (not shown) are arranged to form stitches in response to movements of the needle 10 and both loopers 30, 32.
【００１３】次に、針糸天秤２０の動作を図３のタイミ
ングチャートを参照して説明する。尚、縫製準備の際
に、針糸天秤２０はその取付元付近で両糸案内２２に通
されている針糸２５に係合し、針１０と糸調子皿２４と
の間の針糸２５のテンションによって既に矢印Ｅ方向に
幾分弾性変形している。また、両糸案内２２の間の針糸
２５の経路は針糸天秤２０によって幾分折り曲げられて
いる（Ｔ１）。Next, the operation of the needle thread balance 20 will be described with reference to the timing chart of FIG. At the time of preparation for sewing, the needle thread balance 20 is engaged with the needle thread 25 that is passed through the thread guides 22 near its attachment source, and the needle thread 25 between the needle 10 and the thread tension disc 24 is removed. It has already been somewhat elastically deformed in the direction of arrow E by the tension. The path of the needle thread 25 between the two thread guides 22 is somewhat bent by the needle thread balance 20 (T1).
【００１４】まず、針棒駆動腕１８の矢印Ａ方向の揺動
に伴って、針棒クランク１６が下降されると、針１０が
針棒１２と一体的に下降し始める。また、針棒クランク
１６の下降に伴い、針糸天秤２０と針糸２５との係合位
置が針糸天秤２２の取付元から先端方向に変化する（図
２の針糸４０から針糸４４の位置へ）。このとき、針糸
天秤２０の円弧形状及び弾性変形具合によって、糸駒か
ら針糸２５が引き出すことなく、針糸案内２２の間の針
糸２５の経路は折り曲げられる（図４のゆるみ量に相
当）。また、針１０はその下降に伴い針糸２５を糸駒か
ら引き出して、縫目に必要な糸量を確保する。更に、針
棒駆動腕１８が矢印Ａ方向に揺動すると、針棒クランク
１６が更に下降して、針糸天秤２０から針糸２５が僅か
に離間するので、針糸天秤２０の弾性変形が極端に減少
する（Ｔ２、または、Ｔ３）。次に、針１０が最下点付
近に達すると、針１０と両ルーパー３０，３２とによっ
て針糸２５と上下ルーパー糸が絡み合わされる。First, when the needle bar crank 16 is lowered along with the swing of the needle bar drive arm 18 in the direction of arrow A, the needle 10 starts to move down integrally with the needle bar 12. Further, as the needle bar crank 16 descends, the engagement position between the needle thread balance 20 and the needle thread 25 changes from the attachment source of the needle thread balance 22 to the tip direction (from the needle thread 40 to the needle thread 44 in FIG. 2). To position). At this time, the path of the needle thread 25 between the needle thread guides 22 is bent (corresponding to the amount of looseness in FIG. 4) without the needle thread 25 being pulled out from the thread spool due to the arc shape and elastic deformation of the needle thread balance 20. ). Further, as the needle 10 descends, the needle thread 25 is pulled out from the thread spool to secure a necessary thread amount for the stitch. Further, when the needle bar drive arm 18 swings in the direction of arrow A, the needle bar crank 16 further descends, and the needle thread 25 is slightly separated from the needle thread balance 20, so that the elastic deformation of the needle thread balance 20 is extremely large. (T2 or T3). Next, when the needle 10 reaches the vicinity of the lowest point, the needle thread 25 and the upper and lower looper threads are entangled with each other by the needle 10 and both loopers 30, 32.
【００１５】そして、針棒駆動腕１８の揺動方向が反矢
印Ａ方向に反転すると、針棒クランク１６が上昇し、針
１０が上昇し始める共に、針糸天秤２０と針糸２５が再
び係合し、針糸案内２２の間の針糸２５の経路が序々に
折り曲げられる（Ｔ４）。そして、針１０がある程度上
昇したら、布Ｗは送り機構により矢印Ｂ方向に移動され
始め、針１０と糸調子皿２４との間のテンションが一層
増加し、針糸天秤２０が矢印Ｅ方向に一層弾性変形す
る。また、針棒クランク１６の上昇に伴い、針糸天秤２
０と針糸２５との係合位置が針糸天秤２０の先端から取
付元方向に変化する（図２の針糸４４から針糸４０）。
このとき、針糸天秤２０の円弧形状及び弾性変形具合に
よって、針糸案内２２の間の針糸２５の経路は折り曲げ
られる。また、針１０はその上昇にともなって縫目の引
締めに寄与する。When the swinging direction of the needle bar driving arm 18 is reversed to the direction of the arrow A, the needle bar crank 16 rises, the needle 10 starts to rise, and the needle thread balance 20 and the needle thread 25 are engaged again. Then, the path of the needle thread 25 between the needle thread guides 22 is gradually bent (T4). Then, when the needle 10 is lifted to some extent, the cloth W starts to be moved in the arrow B direction by the feeding mechanism, the tension between the needle 10 and the thread tension disc 24 is further increased, and the needle thread balance 20 is further moved in the arrow E direction. Elastically deforms. Further, as the needle bar crank 16 rises, the needle thread balance 2
The engagement position between 0 and the needle thread 25 changes from the tip of the needle thread balance 20 in the mounting direction (the needle thread 44 to the needle thread 40 in FIG. 2).
At this time, the path of the needle thread 25 between the needle thread guides 22 is bent depending on the arc shape and the elastic deformation of the needle thread balance 20. Further, the needle 10 contributes to tightening the seam as the needle 10 rises.
【００１６】尚、糸案内２２の間の針糸２５の経路は、
厚い布や硬い布を縫う場合（グラフａ）より薄い布や柔
らかい布を縫う場合（グラフｂ）の方が大きく折り曲げ
られる。また、針糸天秤２０は、厚い布を縫う時（図２
の状態ｄ）に薄い布を縫う時（図２の状態ｅ）よりも大
きく矢印Ｅ方向に弾性変形する。The path of the needle thread 25 between the thread guides 22 is
When a thin cloth or a soft cloth is sewn (graph b), it is bent more than when a thick cloth or a hard cloth is sewn (graph a). Further, the needle thread balance 20 is used when sewing thick cloth (see FIG.
In the state d), the elastic deformation in the direction of the arrow E is larger than that when the thin cloth is sewn (state e in FIG. 2).
【００１７】上述した実施例のように、弾性体の針糸天
秤２０が布厚や布質によってそれぞれ弾性変形して針糸
２５のたるみや張りを適宜吸収するので、良好な縫製を
行なうことができる。例えば、平均的な布厚より薄い布
を縫う場合、縫目で消費される糸量は少なくてすむので
針糸２５が余るが、余った糸は針糸天秤２０の図２の状
態ｃに復元する反矢印Ｅ方向の弾性変形によって適度に
張った状態になる。また、想定している布より厚い布を
縫う場合、縫目で消費される糸量は多いので、針１０と
糸調子皿２４との間の針糸２５がかなり張るが、針糸天
秤２０が針糸２５のテンションにより矢印Ｅ方向に弾性
変形して、縫目が必要以上に引っ張られることが防止さ
れ、縫い目が状態が良好に維持される。想定されている
厚さよりも厚い布を縫う場合、かなり突っ張った針糸２
５を針糸天秤２０が引くと、糸駒から針糸２５が引き出
され、次の縫目がゆるんでしまう恐れもあるが、針糸天
秤２０の弾性変形によってその針糸２５の突っ張り吸収
されるので、糸駒から針糸２５が引き出されることが防
止され、縫い目が状態が良好に維持される。As in the above-described embodiment, the elastic needle thread balance 20 is elastically deformed depending on the cloth thickness and the cloth quality to appropriately absorb the slack and tension of the needle thread 25, so that good sewing can be performed. it can. For example, when sewing a cloth that is thinner than the average cloth thickness, the amount of thread consumed at the seam is small and the needle thread 25 remains, but the remaining thread is restored to the state c of the needle thread balance 20 in FIG. Due to the elastic deformation in the direction opposite to the arrow E, the state is appropriately stretched. Further, when sewing a cloth thicker than the assumed cloth, the thread amount consumed at the seam is large, and therefore the needle thread 25 between the needle 10 and the thread tension disc 24 is considerably stretched, but the needle thread balance 20 The tension of the needle thread 25 elastically deforms in the direction of the arrow E to prevent the seam from being pulled more than necessary, and the seam is maintained in a good condition. When sewing a cloth thicker than the intended thickness, the needle thread 2 that is considerably taut
When the needle thread balance 20 is pulled by 5, the needle thread 25 may be pulled out from the thread spool and the next stitch may be loosened, but the elastic deformation of the needle thread balance 20 causes the needle thread 25 to be stretched and absorbed. Therefore, the needle thread 25 is prevented from being pulled out from the thread spool, and the stitch is maintained in a good condition.
【００１８】上述した実施例のように、針糸天秤２０を
線状の針金で構成したので、所望の形状に成形すること
が簡単で且つ安価である。また、上述した実施例におい
ては、針糸天秤２０自体を弾性を有する金属の針金で構
成したが、針糸天秤２０自体に弾性を有するのではな
く、針糸２５のゆるみや張り過ぎを吸収するように針糸
天秤２０の支持部に弾性体を設けても良い。更に、針糸
天秤２０自体を弾性を有する金属の針金で構成したが、
弾性を有する材質であれば、合成樹脂、ゴム、プラスチ
ックでも良い。更に、上述した実施例においては、針糸
天秤２０を弾性を有する線状の針金によって作成したが
弾性を有する板状で構成しても良い。Since the needle thread balance 20 is composed of the linear wire as in the above-mentioned embodiment, it is easy and inexpensive to form it into a desired shape. Further, in the above-described embodiment, the needle thread balance 20 itself is made of the elastic metal wire, but the needle thread balance 20 itself does not have elasticity, and absorbs the looseness or the excessive tension of the needle thread 25. As described above, an elastic body may be provided on the support portion of the needle thread balance 20. Further, the needle thread balance 20 itself is made of a metal wire having elasticity,
As long as the material has elasticity, synthetic resin, rubber or plastic may be used. Furthermore, in the above-described embodiment, the needle thread balance 20 is made of elastic linear wire, but may be made of an elastic plate.
【００１９】上述した実施例においては、針糸天秤２０
が縫目形成のための針糸２５を糸駒から引き出さないよ
うに構成されているが、ミシンや縫目によっては針糸天
秤２０が針糸２５を糸駒から引き出すように構成しても
よい。In the embodiment described above, the needle thread balance 20
Is configured not to pull out the needle thread 25 for forming the stitch from the thread spool, but the needle thread balance 20 may be configured to pull out the needle thread 25 from the thread spool depending on the sewing machine or the stitch. .
【００２０】[0020]
【発明の効果】以上説明したことから明かなように、本
発明の請求項１記載のミシンでは、弾性体で作られた針
糸天秤を備えており、布厚や布質の変化によって生じる
針糸のゆるみや張り過ぎを吸収して、良好な縫製を行う
ことができる。As is apparent from the above description, the sewing machine according to the first aspect of the present invention is provided with the needle thread balance made of an elastic body, and the needle is produced by the change of the cloth thickness or the cloth quality. It is possible to absorb looseness and excessive tension of the thread and perform good sewing.
【００２１】また、請求項２記載のミシンによれば、針
糸天秤を線状の針金で構成したので、所望の形状に成形
することが簡単である。Further, according to the sewing machine of the second aspect, since the needle thread balance is composed of the linear wire, it is easy to form it into a desired shape.
【図１】本発明の一実施例のミシンの機構を示す斜視図
である。FIG. 1 is a perspective view showing a mechanism of a sewing machine according to an embodiment of the present invention.
【図２】上記ミシンの針糸天秤の側面図である。FIG. 2 is a side view of the needle thread balance of the sewing machine.
【図３】厚い布を縫う時と薄い布を縫う時の針糸のゆる
み量を示すグラフである。FIG. 3 is a graph showing the amount of looseness of a needle thread when sewing a thick cloth and when sewing a thin cloth.
【図４】従来の針糸天秤の側面図である。FIG. 4 is a side view of a conventional needle thread balance.
１０ 針 １２ 針棒 １６ 針棒クランクロット ２０ 針糸天秤 ２２ 糸案内 10 needles 12 needle bar 16 needle bar crank lot 20 needle thread balance 22 thread guide
Claims (2)
下動に対応して針糸を捕捉するルーパーと、前記針糸を
狭持する糸調子手段と、前記針と前記糸調子手段との間
に配置されると共に、前記針の運動に対応して移動され
る針糸天秤とを有するミシンにおいて、 前記針と糸調子手段との間の針糸に関連して変形する弾
性体を有する針糸天秤を備えていることを特徴とするミ
シン。1. A needle that moves up and down with a needle thread, a looper that captures the needle thread in response to the vertical movement of the needle, a thread tensioning means that holds the needle thread, the needle and the thread tensioner. A sewing machine having a needle thread balance which is arranged between the needle and the thread tension means, the elastic body being deformed in relation to the needle thread between the needle and the thread tensioning means. A sewing machine having a needle thread balance having:
構成されていることを特徴とする請求項１記載のミシ
ン。2. The sewing machine according to claim 1, wherein the needle thread balance is composed of a linear elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23892594A JPH08103588A (en) | 1994-10-03 | 1994-10-03 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23892594A JPH08103588A (en) | 1994-10-03 | 1994-10-03 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08103588A true JPH08103588A (en) | 1996-04-23 |
Family
ID=17037321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23892594A Pending JPH08103588A (en) | 1994-10-03 | 1994-10-03 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08103588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099726A (en) * | 2014-06-24 | 2014-10-15 | 台州拓卡奔马机电科技有限公司 | Driving mechanism for thread sewing and presser foot lifting thread-scissoring and buttonholing machine |
-
1994
- 1994-10-03 JP JP23892594A patent/JPH08103588A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099726A (en) * | 2014-06-24 | 2014-10-15 | 台州拓卡奔马机电科技有限公司 | Driving mechanism for thread sewing and presser foot lifting thread-scissoring and buttonholing machine |
| CN104099726B (en) * | 2014-06-24 | 2022-07-05 | 拓卡奔马机电科技有限公司 | Driving mechanism for routing, lifting presser foot and trimming and buttonhole sewing machine |
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