JP4605448B2 - Intermittent presser vertical drive device and sewing machine - Google Patents
Intermittent presser vertical drive device and sewing machine Download PDFInfo
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Description
本発明は、縫針が縫製対象の加工布に対して上昇する際に加工布の浮き上がりを間欠押えで防止するようにした間欠押え上下駆動装置及びミシンに関する。 The present invention relates to an intermittent presser vertical drive device and a sewing machine that prevent the work cloth from being lifted by an intermittent presser when the sewing needle is raised with respect to the work cloth to be sewn.
従来、加工布に縫目を形成する場合に、縫針が上昇する際に加工布の浮き上がりを防止できるように、布押えを針棒の上下動と同期させて上下動させる間欠押え駆動装置を装備しているミシンが普及している。 Conventionally, when forming a seam on a work cloth, an intermittent presser drive device that moves the work clamp up and down in synchronization with the vertical movement of the needle bar is provided to prevent the work cloth from lifting when the sewing needle is raised. Sewing machines are popular.
例えば、特許文献１のミシンの布押え装置は、フレームに固着したブラケットに取付けたシリンダのピストンロッドにより回動部材を介して支持部材の基端部を上下動可能に支持し、この支持部材に回動可能に枢支した揺動カムの先端部の二股部に、針棒に固着したピンを係合させるとともに、揺動カムに形成した円弧状カムに、押え棒に枢着したカムフォロワが当接させてあり、針棒が上下動範囲Ｒで上下揺動するので、円弧状カム及びカムフォロワを介して押え棒を針棒の上下動に同期させて作動ストロークＳ１で間欠的に上下動できるようにする一方、シリンダを作動させて布押え足の上下動ストロークの下限位置を調節できるようにしてある。
前述した特許文献１に記載のミシンの布押え装置においては、針棒の上下動に同期させて揺動カムの揺動により布押え足を間欠的に上下動できるとともに、シリンダの作動により揺動カムの基端部の高さ位置を変更して、布押え足の上下動ストロークの下限位置を調節できるようにしてあるが、下限位置の調節に際して、揺動カムが二股部のピンにより斜め上方又は斜め下方に移動するため、シリンダのピストンロッドの伸縮度合いと布押え足の上下移動量とが比例関係ではなく、何らかの曲線状に変化するので、シリンダによる布押え足の高さ位置調節が非常に複雑化するという問題がある。 In the cloth presser device of the sewing machine described in Patent Document 1 described above, the presser foot can be intermittently moved up and down by the swing of the swing cam in synchronization with the vertical movement of the needle bar and swinged by the operation of the cylinder. The lower position of the vertical movement stroke of the presser foot can be adjusted by changing the height position of the base end of the cam, but when adjusting the lower limit position, the swing cam is tilted upward by the bifurcated pin. Alternatively, because the cylinder moves downward, the degree of expansion / contraction of the piston rod of the cylinder and the amount of vertical movement of the presser foot changes not in a proportional relationship, but changes in some form of a curve. There is a problem that it becomes complicated.
更に、布押え足の上下動ストロークを調節できるようになっていないため、加工布の材質に応じた最適な布押えを実現できないという問題がある。そこで、揺動カムの二股部に係合する針棒側のピンの取付け位置を水平方向に移動させることで、布押え足の上下動ストロークを調節できるようにした場合には、揺動カムがその基端部の枢支ピンを回動中心として二股部側が上方又は下方に移動するため、布押え足の下限位置が変更される。そのため、シリンダによる布押え足の下限位置調節をし直す必要があり、調節作業が煩雑化するだけでなく、多大の調節時間を必要とすること、等の問題がある。 Furthermore, since the vertical movement stroke of the presser foot is not adjustable, there is a problem that an optimum presser foot according to the material of the work cloth cannot be realized. Therefore, if the vertical movement stroke of the presser foot can be adjusted by moving the mounting position of the pin on the needle bar side that engages the bifurcated portion of the swing cam in the horizontal direction, Since the bifurcated portion side moves upward or downward with the pivot pin at the base end as the rotation center, the lower limit position of the presser foot is changed. For this reason, it is necessary to readjust the lower limit position of the presser foot by the cylinder, which not only complicates the adjustment work but also requires a lot of adjustment time.
請求項１に係る間欠押え上下駆動装置は、ミシンの針棒の上下動に連動して縫製対象布を押える間欠押えと、主軸の回転駆動力を間欠押えを上下動させる上下駆動力に変換して伝達する駆動力伝達系を備えた上下駆動装置において、上下駆動装置が、主軸の回転駆動力を受けて第１レバーを揺動させる揺動機構と、第１レバーの出力端部分に連結されて間欠押えを上下駆動する上下動機構であって、第１レバーの出力端部に連結された横向きの第１リンクと、この第１リンクに連結されて下方へ延び且つ間欠押えに連結された第２リンクと、この第２リンクと機枠の枢支部とに亙って連結された横向きの第３リンクとを有し、針棒が所定位置のときに第１，第２，第３リンクが平行リンクとなるように構成された上下動機構と、間欠押えの下限位置を調節する間欠押え下限位置調節機構と、針棒が所定位置のときに平行リンクを維持したまま、第１リンクの位置を、間欠押えの上下動ストロークを大きくする第１位置と上下動ストロークを小さくする第２位置とに択一的に切換えることにより上下動ストロークを調節可能な上下動ストローク調節機構とを備えたものである。 The intermittent presser vertical drive device according to claim 1 converts the intermittent presser for pressing the cloth to be sewn in conjunction with the vertical movement of the needle bar of the sewing machine and the vertical drive force for moving the intermittent presser up and down to the rotational drive force of the spindle. In the vertical drive device provided with the driving force transmission system that transmits the first lever, the vertical drive device is connected to the swing mechanism that swings the first lever in response to the rotational driving force of the main shaft, and the output end portion of the first lever. A vertical movement mechanism for driving the intermittent presser up and down , a first horizontal link connected to the output end of the first lever, and a downward link connected to the first link and connected to the intermittent presser. A first link, a second link, and a third link that is connected to the second link and the pivot of the machine frame. The first, second, and third links when the needle bar is at a predetermined position. a vertical movement mechanism is configured such that the parallel link, under the intermittent presser And intermittent presser lower limit position adjusting mechanism for adjusting the position, while the needle bar is maintained parallel links when the predetermined position, the position of the first link, the first position and the vertical motion stroke to increase the vertical movement stroke of the stepping clamp And a vertical movement stroke adjusting mechanism capable of adjusting the vertical movement stroke by selectively switching to a second position for reducing the vertical movement stroke .
縫製に際して主軸が回転駆動されるので、揺動機構により主軸の回転駆動力を受けて第１レバーを揺動させると、上下動機構により間欠押えが針棒の上下動に連動して上下駆動される。即ち、第１レバーの揺動がこれら第１，第２，第３リンクを介して間欠押えの上下駆動力に変換され、間欠押えは、間欠押え下限位置調節機構で調節された下限位置に対して所定の上下動ストロークで上下動する。 Since the main shaft is rotationally driven during sewing, when the first lever is swung in response to the rotation driving force of the main shaft by the swing mechanism, the intermittent presser is driven up and down in conjunction with the vertical movement of the needle bar. The That is, the swing of the first lever is converted to the vertical driving force of the intermittent presser via these first, second, and third links, and the intermittent presser is moved with respect to the lower limit position adjusted by the intermittent presser lower limit position adjusting mechanism. Moves up and down with a predetermined vertical movement stroke.
ところで、針棒がその最上位置等の所定位置のときに、第１，第２，第３リンクが平行リンクとなるので、間欠押え下限位置調節機構により間欠押えの下限位置を調節する為に、第２リンクを上下動させた場合でも、第２リンクはその姿勢を保持しながらリニアに上下動するので、第２リンクの上下移動量とリニアに上下動する間欠押えの上下移動量とが比例関係にある。それ故、間欠押えの下限位置を調節する際の上下移動量を第２リンクの上下移動量により簡単に設定できる。 By the way, when the needle bar is at a predetermined position such as its uppermost position, the first, second, and third links become parallel links, so in order to adjust the lower limit position of the intermittent presser by the intermittent presser lower limit position adjusting mechanism, Even when the second link is moved up and down, the second link moves up and down linearly while maintaining its posture. Therefore, the amount of up and down movement of the second link is proportional to the amount of up and down movement of the intermittent presser that moves linearly up and down. There is a relationship. Therefore, the vertical movement amount when adjusting the lower limit position of the intermittent presser can be easily set by the vertical movement amount of the second link.
請求項２に係る間欠押え上下駆動装置は、請求項１の発明において、前記上下動ストローク調節機構は、第１レバーの出力端部に形成された上下１対の連結穴と、第２リンクの上端付近部に形成された上下１対の連結穴とを有するものである。 According to a second aspect of the present invention, in the intermittent presser vertical drive device according to the first aspect of the invention, the vertical movement stroke adjusting mechanism includes a pair of upper and lower connecting holes formed at the output end of the first lever, and a second link. It has a pair of upper and lower connecting holes formed in the vicinity of the upper end.
請求項３に係る間欠押え上下駆動装置は、請求項１又は２の発明において、前記間欠押え下限位置調節機構は、第３リンクの長さ方向途中部を支える支持点部と、この支持点部の高さ位置を調節する高さ位置調節手段とを有するものである。 The intermittent presser vertical drive device according to a third aspect is the invention according to the first or second aspect , wherein the intermittent presser lower limit position adjusting mechanism includes a support point portion that supports a middle portion in the length direction of the third link, and the support point portion. And a height position adjusting means for adjusting the height position.
請求項４に係る間欠押え上下駆動装置は、請求項１〜３の何れかの発明において、前記第２リンクは縦リンク部と横リンク部とからなるＬ形部材に形成され、横リンク部が間欠押えに連結されたものである。 The intermittent presser vertical drive device according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the second link is formed in an L-shaped member including a vertical link portion and a horizontal link portion, and the horizontal link portion is It is connected to the intermittent presser foot.
請求項５に係る間欠押え上下駆動装置は、請求項１又は２の発明において、前記針棒が所定位置とは、縫製停止時であって針棒が最上位置付近である。 According to a fifth aspect of the present invention, in the intermittent presser vertical drive device according to the first or second aspect, the predetermined position of the needle bar is when sewing is stopped and the needle bar is near the uppermost position.
請求項６に係る間欠押え上下駆動装置は、請求項１〜４の何れかの発明において、前記揺動機構は、主軸に連結した偏心カムにより一定方向へ往復動作するアーム付き環状部材と、第１レバーの端部に連結されて機枠に枢支された回動軸と、この回動軸から延び且つアーム付き環状部材のアーム部に連結されるレバー部材とを有し、レバー部材は、アーム部の連結位置を切換え可能にする為の円弧穴であって、偏心カムの中心の周りに円弧をなす円弧穴を有するものである。 An intermittent presser vertical drive device according to a sixth aspect is the invention according to any one of the first to fourth aspects, wherein the swing mechanism includes an annular member with an arm that reciprocates in a fixed direction by an eccentric cam connected to the main shaft, A pivot shaft coupled to the end of one lever and pivotally supported by the machine frame; and a lever member extending from the pivot shaft and coupled to an arm portion of an annular member with an arm. An arc hole for switching the connecting position of the arm portion, and has an arc hole forming an arc around the center of the eccentric cam.
請求項７に係るミシンは、請求項１〜請求項６の何れかに記載の間欠押え上下駆動装置を備えたものである。 A sewing machine according to a seventh aspect includes the intermittent presser vertical drive device according to any one of the first to sixth aspects.
請求項１の発明によれば、間欠押えと駆動力伝達系を備えた上下駆動装置において、上下駆動装置が揺動機構と上下動機構と間欠押え下限位置調節機構とを設け、上下動機構が第１リンクと第２リンクと第３リンクとを有し、針棒が所定位置のときにこれら第１，第２，第３リンクが平行リンクとなるように構成されたので、間欠押え下限位置調節機構により第２リンクを上下動させて間欠押えの下限位置を調節した場合、第２リンクはその姿勢を保持しながらリニアに上下動するため、第２リンクの上下移動量と間欠押えの上下移動量とが相互に比例関係にあるので、第２リンクの上下移動による間欠押えの上下移動調節が格段に簡単化する。 According to the first aspect of the present invention, in the vertical drive device having the intermittent presser and the driving force transmission system, the vertical drive device is provided with the swing mechanism, the vertical motion mechanism, and the intermittent presser lower limit position adjusting mechanism, and the vertical motion mechanism is Since the first link, the second link, and the third link are provided, and the first, second, and third links are parallel links when the needle bar is at a predetermined position, the intermittent presser lower limit position When the lower limit position of the intermittent presser is adjusted by moving the second link up and down by the adjustment mechanism, the second link moves up and down linearly while maintaining its posture. Since the movement amount is proportional to each other, the vertical movement adjustment of the intermittent presser by the vertical movement of the second link is greatly simplified.
前記針棒が所定位置のときに平行リンクを維持したまま、第１リンクの位置を、間欠押えの上下動ストロークを大きくする第１位置と、上下動ストロークを小さくする第２位置とに択一的に切換えることにより、上下動ストロークを調節可能な上下動ストローク調節機構を設けたので、第１リンクの位置を第１位置と第２位置とに択一的に切換えても、平行リンクが維持されているため、第２リンクの高さが変わらず、しかもその姿勢が保持されるため、間欠押えの下限位置に影響を及ぼすことがない。 Before Kiharibo remains were maintained parallel links when the predetermined position,-option the position of the first link between a first position to increase the vertical movement stroke of the intermittent pressing, and a second position to reduce the vertical movement stroke Since the vertical movement stroke adjustment mechanism capable of adjusting the vertical movement stroke by switching the single link is provided, even if the position of the first link is alternatively switched between the first position and the second position, the parallel link is Since it is maintained, the height of the second link does not change and the posture is maintained, so that the lower limit position of the intermittent presser is not affected.
即ち、間欠押えの上下動ストロークを調節した場合でも、間欠押えの下限位置が変化しないため、上下動ストローク調節後に間欠押えの下限位置調節をし直す必要がなく、間欠押えの上下動ストロークの調節作業の簡単化を図ることができる。 In other words, even when adjusting the vertical stroke of the intermittent presser, the lower limit position of the intermittent presser does not change, so there is no need to readjust the lower limit position of the intermittent presser after adjusting the vertical stroke. Work can be simplified .
請求項２の発明によれば、前記上下動ストローク調節機構は、第１レバーの出力端部に形成された上下１対の連結穴と、第２リンクの上端付近部に形成された上下１対の連結穴とを有するので、間欠押えの上下動ストローク調節に際して、第１リンクの高さ位置を第１レバーの出力端部と第２リンクの上端付近部に形成した上下１対の連結穴に夫々対応させるように位置切換えするだけでよく、第１リンクの高さ位置調節を簡単化することができる。 According to the invention of claim 2, the vertical movement stroke adjusting mechanism includes a pair of upper and lower connecting holes formed at the output end portion of the first lever and a pair of upper and lower portions formed near the upper end of the second link. Therefore, when adjusting the vertical stroke of the intermittent presser, the height position of the first link is adjusted to a pair of upper and lower connection holes formed near the output end of the first lever and the upper end of the second link. each well only you position switching so as to correspond, it is possible to simplify the height position adjustment of the first link.
しかも間欠押えの上下動ストロークを調節した場合でも、間欠押えの下限位置が変化しないため、上下動ストローク調節後に間欠押えの下限位置調節をし直す必要がなく、間欠押えの上下動ストローク調節作業の簡単化を図ることができる。その他請求項１と同様の効果を奏する。 Moreover, even if the vertical stroke of the intermittent presser is adjusted, the lower limit position of the intermittent presser does not change. Simplification can be achieved. Other effects similar to those of the first aspect are obtained.
請求項３の発明によれば、前記間欠押え下限位置調節機構は、第３リンクの長さ方向途中部を支える支持点部と、この支持点部の高さ位置を調節する高さ位置調節手段とを有するので、高さ位置調節手段により支持点部の高さ位置を変えるだけで第３リンクの長さ方向途中部の高さ位置を変更できるため、第３リンクに連結された第２リンクを介して間欠押えの高さ位置調節の簡単化を図ることができる。その他請求項１〜３の何れかと同様の効果を奏する。 According to the invention of claim 3, the intermittent presser lower limit position adjusting mechanism includes a support point portion that supports a middle portion in the length direction of the third link, and a height position adjusting means that adjusts the height position of the support point portion. Since the height position of the middle portion in the length direction of the third link can be changed simply by changing the height position of the support point portion by the height position adjusting means, the second link connected to the third link It is possible to simplify the adjustment of the height position of the intermittent presser. Other effects similar to those of any one of claims 1 to 3 are achieved.
請求項４の発明によれば、前記第２リンクは縦リンク部と横リンク部とからなるＬ形部材に形成され、前記横リンク部が間欠押えに連結されたので、横リンク部の長さ如何で、間欠押えの配置に対する第２リンクの配置の自由度を高めることができる。その他請求項１〜３の何れかと同様の効果を奏する。 According to invention of Claim 4 , since the said 2nd link was formed in the L-shaped member which consists of a vertical link part and a horizontal link part, and the said horizontal link part was connected with the intermittent clamp, the length of a horizontal link part In this way, the degree of freedom of the second link arrangement relative to the intermittent presser arrangement can be increased. Other effects similar to those of any one of claims 1 to 3 are achieved.
請求項５の発明によれば、前記針棒が所定位置とは、縫製停止時であって針棒が最上位置付近であるので、縫製を停止させた針棒の最上位置付近のときに、第１レバーの揺動姿勢や第１，第２，第３リンクによる平行リンクの姿勢を夫々基準位置に設定でき、この基準位置において間欠押えの上下移動を調節することができる。その他請求項１又は２と同様の効果を奏する。 According to the invention of claim 5, the predetermined position of the needle bar is when sewing is stopped and the needle bar is near the uppermost position. Therefore, when the needle bar is near the uppermost position of the needle bar where sewing is stopped, The swinging posture of one lever and the posture of the parallel link by the first, second and third links can be set as the reference position, and the vertical movement of the intermittent presser can be adjusted at this reference position. Other effects similar to those of the first or second aspect are achieved.
請求項６の発明によれば、前記揺動機構は、主軸に連結した偏心カムにより一定方向へ往復動作するアーム付き環状部材と、第１レバーの端部に連結されて機枠に枢支された回動軸と、この回動軸から延び且つアーム付き環状部材のアーム部に連結されるレバー部材とを有し、レバー部材は、前記アーム部の連結位置を切換え可能にする為の円弧穴であって、偏心カムの中心の周りに円弧をなす円弧穴を有するので、アーム付き環状部材のアーム部のレバー部材に対する連結位置をレバー部材の円弧穴に沿って切換えることにより、レバー部材の揺動幅、つまり第１レバーの揺動幅を変更して、間欠押えの上下動ストロークを微調節することができる。 According to a sixth aspect of the present invention, the swing mechanism is pivotally supported by the machine frame connected to the annular member with an arm that reciprocates in a predetermined direction by an eccentric cam connected to the main shaft and the end of the first lever. A rotating shaft and a lever member extending from the rotating shaft and connected to the arm portion of the annular member with the arm, the lever member being an arc hole for switching the connecting position of the arm portion In addition, since it has an arc hole that forms an arc around the center of the eccentric cam, the lever member can be swung by switching the connecting position of the arm portion of the annular member with arm to the lever member along the arc hole of the lever member. The vertical movement stroke of the intermittent presser can be finely adjusted by changing the moving width, that is, the swinging width of the first lever.
レバー部材の円弧穴は偏心カムの中心カムの中心、つまりアーム付き環状部材の回動中心の周りに円弧であるため、上述したように間欠押えの上下動ストロークを微調節した場合でも、レバー部材が揺動することがなく、間欠押えの下限位置が変化しないため、上下動ストロークの微調節後に間欠押えの下限位置調節をし直す必要がなく、間欠押えの上下動ストロークの調節作業の簡単化を図ることができる。その他請求項１〜５の何れかと同様の効果を奏する。 Since the arc hole of the lever member is an arc around the center cam of the eccentric cam, that is, around the rotation center of the annular member with the arm, even if the vertical movement stroke of the intermittent presser is finely adjusted as described above, the lever member The lower limit position of the intermittent presser does not change, so there is no need to readjust the lower limit position of the intermittent presser after fine adjustment of the vertical movement stroke. Can be achieved. Other effects similar to those of any one of claims 1 to 5 can be achieved.
請求項７の発明によれば、請求項１〜請求項６の何れかに記載の間欠押え上下駆動装置を備えたので、請求項１〜請求項６の何れかの効果を発揮できるミシンを実現させることができる。 According to the invention of claim 7 , since the intermittent presser vertical drive device according to any of claims 1 to 6 is provided, a sewing machine capable of exhibiting the effect of any of claims 1 to 6 is realized. Can be made.
本実施形態における間欠押え上下駆動装置は、縫製対象布を押える間欠押えの上下動ストロークを調節可能で、しかも間欠押えの下限位置も調節でき、これらの調節作業の簡単化を図るようにしてある。 The intermittent presser vertical drive device according to the present embodiment can adjust the vertical movement stroke of the intermittent presser that presses the cloth to be sewn, and can also adjust the lower limit position of the intermittent presser, thereby simplifying the adjustment work. .
図１に示すように、電子閂止めミシンＭにおいては、ベッド部１（図４参照）の後端部に脚柱部３が立設され、この脚柱部３の上端から前方に延びるアーム部４はベッド部１の上方に対向するように水平に配設され、このアーム部４内に図示外のミシンモータで回転駆動される主軸５が配設されている。アーム部４の頭部には、図示しないが下端に縫針を着脱可能に装着された針棒が設けられるとともに、下端に間欠押え６を装着した押え棒７が配設されている。 As shown in FIG. 1, in the electronic tacking sewing machine M, a pedestal 3 is erected at the rear end of the bed 1 (see FIG. 4) , and the arm extends forward from the upper end of the pedestal 3. 4 is disposed horizontally so as to be opposed to the upper side of the bed portion 1, and a main shaft 5 that is rotationally driven by a sewing machine motor (not shown) is disposed in the arm portion 4. Although not shown, a needle bar having a sewing needle detachably attached to the lower end thereof is provided on the head of the arm portion 4, and a presser bar 7 having an intermittent presser 6 attached to the lower end thereof.
次に、間欠押え６を上下動させる間欠押え上下駆動装置１０について、図１〜図４に基づいて説明する。この間欠押え上下駆動装置１０は、主軸５の回転駆動力を受けて第１レバー２４を揺動させる揺動機構１１と、第１レバー２４の出力端部分に連結されて間欠押え６を上下駆動する上下動機構１２と、間欠押え６の下限位置を調節する間欠押え下限位置調節機構１３等を有している。 Next, the intermittent presser vertical drive device 10 that moves the intermittent presser 6 up and down will be described with reference to FIGS. The intermittent presser vertical drive device 10 is connected to the swing mechanism 11 that receives the rotational driving force of the main shaft 5 and swings the first lever 24, and the output end portion of the first lever 24 to drive the intermittent presser 6 up and down. And an intermittent presser lower limit position adjusting mechanism 13 for adjusting the lower limit position of the intermittent presser 6.
揺動機構１１は、主軸５に連結した偏心カム２０（図５−１、図６−１、図６−２参照）により左右方向へ往復動作するアーム付き環状部材２１と、第１レバー２４の上端部に連結されて機枠Ｆに枢支された回動軸２２と、この回動軸２２の後端部から下方に延び且つアーム付き環状部材２１のアーム部２１ａに連結されるレバー部材２３とを有している。 The swinging mechanism 11 includes an annular member 21 with an arm that reciprocates in the left-right direction by an eccentric cam 20 (see FIGS. 5A, 6A, and 6B) connected to the main shaft 5, and a first lever 24. A rotating shaft 22 connected to the upper end portion and pivotally supported by the machine frame F, and a lever member 23 extending downward from a rear end portion of the rotating shaft 22 and connected to the arm portion 21a of the annular member 21 with an arm. And have.
主軸５の前方に偏心カム２０が固着され、その偏心カム２０にアーム付き環状部材２１の環状部２１ｂが外嵌されている。一方、アーム付き環状部材２１よりも前側で且つ高い位置に前後方向向きの回動軸２２が機枠Ｆに回動可能に枢支され、その回動軸２２の後端部にレバー部材２３の上端部が固着されるとともに、回動軸２２の前端部に第１レバー２４の上端部が固着されている。 An eccentric cam 20 is fixed in front of the main shaft 5, and an annular portion 21 b of an annular member 21 with an arm is fitted on the eccentric cam 20. On the other hand, a rotating shaft 22 in the front-rear direction is pivotally supported by the machine frame F at a position higher than the annular member 21 with the arm and at a higher position, and a lever member 23 is provided at the rear end of the rotating shaft 22. The upper end is fixed, and the upper end of the first lever 24 is fixed to the front end of the rotating shaft 22.
レバー部材２３には、アーム付き環状部材２１から左方に延びたアーム部２１ａの連結位置を切換え可能にする為に、偏心カム２０の中心の周りに、半径Ｒの円弧をなす所定幅の湾曲凹部２３ａが形成されるとともに、その湾曲凹部２３ａの幅寸法よりも小さい幅寸法に形成された湾曲状の円弧穴２３ａであって、偏心カム２０の中心の周り、つまり図５−１に示すように、アーム付き環状部材２１の環状部２１ｂの軸心の周りに、半径Ｒの円弧をなす円弧穴２３ｂを、湾曲凹部２３ａの後側に連続させて形成してある。 The lever member 23 is curved with a predetermined width that forms an arc of radius R around the center of the eccentric cam 20 so that the connecting position of the arm portion 21a extending to the left from the annular member 21 with arm can be switched. A concave arc hole 23a formed with a recess 23a and a width smaller than the width of the curved recess 23a, and around the center of the eccentric cam 20, that is, as shown in FIG. In addition, an arc hole 23b having an arc of radius R is formed continuously around the axis of the annular portion 21b of the annular member 21 with the arm, continuously on the rear side of the curved recess 23a.
アーム部２１ａの左端部に回動可能に連結された摺動ピン２６が湾曲凹部２３ａの両側面に係合し、摺動ピン２６の後側に延設された軸状の固定部（図示略）が円弧穴２３ｂを挿通し、固定ナットでアーム部２１ａに螺着されている。それ故、固定ナットを緩めると、摺動ピン２６を湾曲凹部２３ａに沿わせながら、円弧穴２３ｂを介して任意の連結位置に切換えることができる。 A slide pin 26 rotatably connected to the left end portion of the arm portion 21a engages with both side surfaces of the curved recess 23a, and a shaft-like fixed portion (not shown) extending to the rear side of the slide pin 26. ) Is inserted through the arc hole 23b and screwed to the arm portion 21a with a fixing nut. Therefore, when the fixing nut is loosened, the sliding pin 26 can be switched to an arbitrary connecting position through the arc hole 23b while being along the curved recess 23a.
ここで、摺動ピン２６の対向する２面において面取りされており、摺動ピン２６の面取り部を湾曲凹部２３ａに当接させることで、摺動ピン２６を固定ナットで締めたり緩めるときの回り止めがされている。 Here it is chamfered at the opposing two sides of the sliding pin 26, by abutting the chamfered portion of the sliding pin 26 to the curved recess 23a, that preparative-out loosen or tighten the sliding pin 26 with lock nut The detent is stopped.
縫製作業が開始されて主軸５が所定回転方向に回転駆動されると、偏心カム２０によりアーム付き環状部材２１が左右方向に往復移動するので、円弧穴２３ａと摺動ピン２５の係合を介してレバー部材２３が回動軸２２を中心に揺動し、回動軸２２に連結された第１レバー２４が揺動する（図５−２参照）。 When the sewing operation is started and the main shaft 5 is rotationally driven in a predetermined rotational direction, the annular member 21 with the arm is reciprocated in the left-right direction by the eccentric cam 20, so that the arc hole 23 a and the sliding pin 25 are engaged. As a result, the lever member 23 swings about the rotation shaft 22, and the first lever 24 connected to the rotation shaft 22 swings (see FIG. 5-2).
ここで、アーム部２１ａの摺動ピン２５の円弧穴２３ａとの連結位置を、図６−１に示す下側の小揺動位置に切換えると、第１レバー２４の揺動幅が小さくなって間欠押え６の上下動ストロークが小さくなり、図６−２に示す上側の大揺動位置に切換えると、第１レバー２４の揺動幅が大きくなって間欠押え６の上下動ストロークが大きくなる。 Here, when the connecting position of the arm portion 21a with the arc hole 23a of the sliding pin 25 is switched to the lower small swinging position shown in FIG. 6-1, the swinging width of the first lever 24 is reduced. When the vertical movement stroke of the intermittent presser 6 is reduced and switched to the upper large swinging position shown in FIG. 6B, the swinging width of the first lever 24 is increased and the vertical movement stroke of the intermittent presser 6 is increased.
即ち、これら円弧穴２３ａと摺動ピン２５等から揺動量微調節機構１６が構成されている。このように、針棒が所定位置において、揺動量微調節機構１６を介して摺動ピン２５の連結位置を切換えて第１レバー２４の揺動角、つまり間欠押え６の上下動ストロークを微調節した場合、円弧穴２３ｂは偏心カム２０の中心の周りに円弧をなしているため、レバー部材２３及び第１レバー２４が揺動することがなく、間欠押え６の下限位置が変化しないようになっている。 That is, the rocking amount fine adjustment mechanism 16 is constituted by the arc hole 23a, the sliding pin 25 and the like. In this way, when the needle bar is in a predetermined position, the connecting position of the sliding pin 25 is switched via the swing amount fine adjustment mechanism 16 to finely adjust the swing angle of the first lever 24, that is, the vertical movement stroke of the intermittent presser 6. In this case, since the arc hole 23b forms an arc around the center of the eccentric cam 20, the lever member 23 and the first lever 24 do not swing, and the lower limit position of the intermittent presser 6 does not change. ing.
次に、間欠押え６を上下駆動する上下動機構１２について説明する。図１〜図３、図５−２に示すように、上下動機構１２は、第１レバー２４の出力端部に左端部で連結された横向きの第１リンク３０と、この第１リンク３０の右端部に連結されて下方へ延び且つ間欠押え６に連結された正面視Ｌ形の第２リンク３１と、右端部で第２リンク３１の基端部に連結し且つ左端部で機枠Ｆの枢支部（図示略）に連結された横向きの第３リンク３２とを有している。 Next, the vertical movement mechanism 12 that drives the intermittent presser 6 up and down will be described. As shown in FIG. 1 to FIG. 3 and FIG. 5B, the vertical movement mechanism 12 includes a lateral first link 30 connected to the output end of the first lever 24 at the left end, and the first link 30. L-shaped second link 31 connected to the right end portion, extending downward and connected to intermittent presser 6, and connected to the base end portion of second link 31 at the right end portion and to frame F at the left end portion. And a third horizontal link 32 connected to a pivot (not shown).
第２リンク３１は縦リンク部３１ａと横リンク部３１ｂとからなるＬ形部材に形成され、横リンク部３１ｂの先端部に上下向きの連結リンク３３の上端部が連結され、連結リンク３３の下端部で押え抱き３４を介して押え棒７の上端部が固着され、押え棒７の下端部に間欠押え６が着脱可能に固着されている。 The second link 31 is formed as an L-shaped member composed of a vertical link portion 31 a and a horizontal link portion 31 b, and an upper end portion of a vertically connecting link 33 is connected to a distal end portion of the horizontal link portion 31 b, and a lower end of the connection link 33. The upper end portion of the presser bar 7 is fixed to the lower end portion of the presser bar 7 through the presser hug 34, and the intermittent presser 6 is fixed to the lower end part of the presser bar 7 in a detachable manner.
ここで、図４に示すように、第３リンク３２の二股状のバネ受け部３２ａが圧縮コイルバネ３５により常に下向きに弾性部材されている。第３リンク３２の水平方向に対する仰角（勾配）は、後述する間欠押え下限位置調節機構１３の支持点部４８ａにより変更できるようになっている。 Here, as shown in FIG. 4, the bifurcated spring receiving portion 32 a of the third link 32 is always elastically pressed downward by the compression coil spring 35. The elevation angle (gradient) of the third link 32 with respect to the horizontal direction can be changed by a support point portion 48a of the intermittent presser lower limit position adjusting mechanism 13 described later.
ところで、針棒が所定位置のとき、例えば最上位置から若干だけ下がった縫製停止時のときに、これら第１，第２，第３リンク３０，３１，３２が平行リンクとなるように構成されている。即ち、第１レバー２４と第１リンク３０の連結点をＰ１、第１リンク３０と第２リンク３１の連結点をＰ２、第２リンク３１と第３リンク３２の連結点をＰ３、第３リンク３２の機枠Ｆとの連結点をＰ４とすると、これら辺Ｐ１−Ｐ２と辺Ｐ３−Ｐ４とが平行で且つ辺Ｐ２−Ｐ３と辺Ｐ４−Ｐ１とが平行になっている。 By the way, when the needle bar is at a predetermined position, for example, at the time of sewing stop being slightly lowered from the uppermost position, the first, second and third links 30, 31, 32 are configured to be parallel links. Yes. That is, the connection point between the first lever 24 and the first link 30 is P1, the connection point between the first link 30 and the second link 31 is P2, the connection point between the second link 31 and the third link 32 is P3, and the third link. Assuming that the connection point with 32 machine frames F is P4, the sides P1-P2 and the sides P3-P4 are parallel, and the sides P2-P3 and the sides P4-P1 are parallel.
主軸５が回転駆動されると、前述したように第１レバー２４が揺動するので、図５−２に示すように、第２リンク３１は第１リンク３０を介して連結点Ｐ３を回動中心として揺動するので、第２リンク３１の横リンク部３１ｂに連結された押え棒７及び間欠押え６が、針棒の上下動に連動して所定の上下動ストロークで上下動される。 When the main shaft 5 is driven to rotate, the first lever 24 swings as described above, so that the second link 31 rotates the connection point P3 via the first link 30 as shown in FIG. Since it swings around the center, the presser bar 7 and the intermittent presser 6 connected to the lateral link part 31b of the second link 31 are moved up and down with a predetermined vertical movement stroke in conjunction with the vertical movement of the needle bar.
次に、間欠押え６の下限位置を調節する間欠押え下限位置調節機構１３について説明する。図１〜図４に示すように、脚柱部３内に、駆動系を収納した駆動ユニットのユニットケース４０が設けられ、そのユニットケース４０に枢着された枢支軸４１にカム体４２が固着されている。この枢支軸４１は、ユニットケース４０に取付けた駆動用ステッピングモータ４３（図１参照）により図示外のギヤ機構を介して正回転駆動又は逆回転駆動される。 Next, the intermittent presser lower limit position adjusting mechanism 13 for adjusting the lower limit position of the intermittent presser 6 will be described. As shown in FIGS. 1 to 4, a unit case 40 of a drive unit containing a drive system is provided in the pedestal 3, and a cam body 42 is attached to a pivot shaft 41 pivotally attached to the unit case 40. It is fixed. The pivot shaft 41 is driven to rotate forward or reversely through a gear mechanism (not shown) by a driving stepping motor 43 (see FIG. 1) attached to the unit case 40.
ユニットケース４０の上端部に枢支軸４４を介して側面視にて略く字状の揺動レバー４５が枢支され、揺動レバー４５の下端部に、カム体４２に外側から当接する従動輪４６が回転可能に枢着されている。揺動レバー４５の上端部に前後方向に延びる連結ロッド４７の後端部が連結されている。連結ロッド４７の前端部は、機枠Ｆに回動可能に枢支された支持レバー４８の一端部に連結され、その支持レバー４８の他端部である支持点部４８ａが第３リンク３２の左右方向途中部に下側から当接している。ここで、連結ロッド４７及び支持レバー４８等で高さ位置調節機構１５（これが高さ位置調節手段に相当する）が構成されている。 A swing lever 45 having a substantially letter shape in a side view is pivotally supported on the upper end portion of the unit case 40 via a pivot shaft 44, and the slave body 45 is in contact with the cam body 42 from the outside at the lower end portion of the swing lever 45. A driving wheel 46 is pivotally mounted rotatably. A rear end portion of a connecting rod 47 extending in the front-rear direction is connected to the upper end portion of the swing lever 45. The front end portion of the connecting rod 47 is connected to one end portion of a support lever 48 pivotally supported by the machine frame F, and a support point portion 48 a which is the other end portion of the support lever 48 is connected to the third link 32. It is in contact with the middle part in the left-right direction from below. Here, the height position adjusting mechanism 15 (which corresponds to the height position adjusting means) is constituted by the connecting rod 47, the support lever 48 and the like.
それ故、駆動用ステッピングモータ４３により枢支軸４１が正回転駆動された場合、連結ロッド４７が後方に移動し、支持レバー４８が図４にて時計回りに回動するので、第３リンク３２の途中部が上方に持ち上げられ、図８−１，図８−２に示す右下降姿勢から、図５−２，図７−１，図７−２に示す右上昇姿勢に切換えられる。このとき、前述したように、連結点Ｐ３が上昇するのに応じて第２リンク３１はその姿勢を変えることなく上昇するので、間欠押え６の下限位置が高くなる。 Therefore, when the pivot shaft 41 is driven to rotate forward by the driving stepping motor 43, the connecting rod 47 moves rearward and the support lever 48 rotates clockwise in FIG. Is raised upward and switched from the right lowered posture shown in FIGS. 8-1 and 8-2 to the right raised posture shown in FIGS. 5-2, 7-1 and 7-2. At this time, as described above, since the second link 31 rises without changing its posture as the connecting point P3 rises, the lower limit position of the intermittent presser 6 increases.
一方、駆動用ステッピングモータ４３により枢支軸４１が逆回転駆動された場合、連結ロッド４７が前方に移動し、支持レバー４８が図４にて反時計回りに回動するので、第３リンク３２の途中部が下方に下げられ、図７−１，図７−２の右上昇姿勢から図８−１，図８−２に示す右下降姿勢に切換えられる。このとき、前述したように、連結点Ｐ３が下降するのに応じて第２リンク３１はその姿勢を変えることなく下降するので、間欠押え６の下限位置が低くなる。 On the other hand, when the pivot shaft 41 is driven in reverse rotation by the driving stepping motor 43, the connecting rod 47 moves forward and the support lever 48 rotates counterclockwise in FIG. Is lowered downward and switched from the right ascending posture in FIGS. 7-1 and 7-2 to the right descending posture as shown in FIGS. 8-1 and 8-2. At this time, as described above, since the second link 31 is lowered without changing its posture as the connecting point P3 is lowered, the lower limit position of the intermittent presser 6 is lowered.
この場合、第３リンク３２が右上昇姿勢から右下降姿勢に切換えられ、或いは第３リンク３２が右下降姿勢から右上昇姿勢に切換えられた場合、針棒が所定位置のときに第１，第２，第３リンク３２が平行リンクに構成されているので、第２リンク３１はその姿勢を保持しながらリニアに上下動するため、図７−１に示す針板２から第２リンク３１の連結点Ｐ３までの高さＨ１と、針板２から間欠押え６の高さＨ２とは、図１１に示すように、相互に比例関係にある。 In this case, when the third link 32 is switched from the right ascending posture to the right ascending posture, or when the third link 32 is switched from the right ascending posture to the right ascending posture, the first and first needle bars are at the predetermined positions. Since the second and third links 32 are configured as parallel links, the second link 31 linearly moves up and down while maintaining its posture, so that the connection from the needle plate 2 to the second link 31 shown in FIG. The height H1 up to the point P3 and the height H2 from the needle plate 2 to the intermittent presser 6 are proportional to each other as shown in FIG.
次に、針棒が所定位置のときに平行リンクを維持したまま、第１リンク３０の位置を、間欠押え６の上下動ストロークを大きくする第１位置と上下動ストロークを小さくする第２位置とに択一的に切換えることにより上下動ストロークを調節可能な上下動ストローク調節機構１４について説明する。 Next, while maintaining the parallel link when the needle bar is at the predetermined position, the position of the first link 30 is changed to the first position for increasing the vertical movement stroke of the intermittent presser 6 and the second position for decreasing the vertical movement stroke. The vertical movement stroke adjusting mechanism 14 capable of adjusting the vertical movement stroke by selectively switching to will be described.
図２、図３、図５−２に示すように、上下動ストローク調節機構１４は、第１レバー２４の出力端部に形成された上下１対の連結穴２４ａ，２４ｂと、第２リンク３１の上端付近部に形成された上下１対の連結穴３１ｃ，３１ｄとを有している。しかも、これら第１レバー２４の上下１対の連結穴２４ａ，２４ｂの間隔と、第２リンク３１の上下１対の連結穴３１ｃ，３１ｄの間隔とは等しい寸法に設定されている。 As shown in FIGS. 2, 3, and 5-2, the vertical movement stroke adjusting mechanism 14 includes a pair of upper and lower connecting holes 24 a and 24 b formed at the output end of the first lever 24, and a second link 31. And a pair of upper and lower connecting holes 31c and 31d formed in the vicinity of the upper end of the. Moreover, the distance between the pair of upper and lower connecting holes 24a and 24b of the first lever 24 and the distance between the pair of upper and lower connecting holes 31c and 31d of the second link 31 are set to be equal.
それ故、間欠押え６の上下動ストロークを調節するために、図７−１，図８−１に示すように、針棒が所定位置のときに、第１リンク３０の左端部を第１レバー２４の下側連結穴２４ａに連結し且つ第１リンク３０の右端部を第１リンク３０の下側連結穴３１ｃに連結した状態から、図７−２，図８−２に示すように、第１リンク３０の左端部を第１レバー２４の上側連結穴２４ｂに連結し且つ第１リンク３０の右端部を第１リンク３０の上側連結穴３１ｄに連結する。 Therefore, in order to adjust the vertical movement stroke of the intermittent presser 6, as shown in FIGS. 7-1 and 8-1, when the needle bar is at a predetermined position, the left end portion of the first link 30 is moved to the first lever. As shown in FIGS. 7-2 and 8-2, the first link 30 is connected to the lower connection hole 24a and the right end portion of the first link 30 is connected to the lower connection hole 31c of the first link 30. The left end of one link 30 is connected to the upper connection hole 24 b of the first lever 24, and the right end of the first link 30 is connected to the upper connection hole 31 d of the first link 30.
即ち、第１リンク３０を、間欠押え６の上下動ストロークを大きくする第１位置から、間欠押え６の上下動ストロークを小さくする第２位置に切換えた場合でも、これら第１，第２，第３リンク３２が平行リンクを維持した状態である。 That is, even when the first link 30 is switched from the first position where the vertical movement stroke of the intermittent presser 6 is increased to the second position where the vertical movement stroke of the intermittent presser 6 is reduced, these first, second and second positions are changed. The three links 32 maintain the parallel links.
次に、このように構成された間欠押え上下駆動装置１０の作用及び効果について説明する。 Next, the operation and effect of the intermittent presser vertical drive device 10 configured as described above will be described.
縫製開始に際して、図６−１に示すように、揺動量微調節機構１６により摺動ピン２５を小揺動位置に切換え、図７−１に示すように、第１リンク３０を下側の第１位置に切換え、駆動用ステッピングモータ４３により間欠押え６の下限位置が高く設定されている。この状態で縫製が開始された場合、図５−２に示すように、前述したように、主軸５の回転駆動によりアーム付き環状部材２１が偏心カム２０により左右方向に往復移動するので第１レバー２４が揺動する。 At the start of sewing, as shown in FIG. 6A, the slide pin 25 is switched to the small swing position by the swing amount fine adjustment mechanism 16, and the first link 30 is moved to the lower first position as shown in FIG. The lower limit position of the intermittent presser 6 is set higher by the driving stepping motor 43. When sewing is started in this state, as shown in FIG. 5B, as described above, the arm-equipped annular member 21 is reciprocated in the left-right direction by the eccentric cam 20 by the rotational drive of the main shaft 5, so that the first lever 24 swings.
その結果、第１リンク３０の左右方向への移動により第２リンク３１が連結点Ｐ３を揺動中心として揺動するため、第２リンク３１の横リンク部３１ｂに連結された間欠押え６が所定の上下動ストロークで上下動される。 As a result, since the second link 31 swings around the connecting point P3 as the first link 30 moves in the left-right direction, the intermittent presser 6 connected to the lateral link portion 31b of the second link 31 is predetermined. It is moved up and down with the up and down movement stroke.
ここで、縫製していない状態、つまり針棒が所定位置のときに、図７−２に示すように、間欠押え６の上下動ストロークを小さくするために、第１リンク３０の取付け位置を下側の第１位置から上側の第２位置に切換えた場合でも、これら第１，第２，第３リンク３２による平行リンクが維持されているため、第２リンク３１の高さ位置及びその姿勢が保持され、間欠押え６の下限位置に影響を及ぼすことがない。 Here, when not being sewn, that is, when the needle bar is at a predetermined position, as shown in FIG. 7B, the mounting position of the first link 30 is lowered to reduce the vertical movement stroke of the intermittent presser 6. Even when the first position on the side is switched to the second position on the upper side, since the parallel links by the first, second, and third links 32 are maintained, the height position and the posture of the second link 31 are determined. The lower limit position of the intermittent presser 6 is not affected.
即ち、間欠押え６の上下動ストロークを調節した場合でも、間欠押え６の下限位置が変化しないため、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 That is, even when the vertical movement stroke of the intermittent presser 6 is adjusted, the lower limit position of the intermittent presser 6 does not change. Therefore, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke. The adjustment work of the dynamic stroke can be simplified.
次に、針棒が所定位置のときに、図８−１に示すように、摺動ピン２５は小揺動位置であり、第１リンク３０の取付け位置を上側の第２位置から下側の第１位置に切換え、しかも間欠押え６の下限位置を低い位置に切換える。 Next, when the needle bar is at a predetermined position, as shown in FIG. 8A, the sliding pin 25 is in the small swing position, and the mounting position of the first link 30 is changed from the second position on the lower side to the lower position. The position is switched to the first position, and the lower limit position of the intermittent presser 6 is switched to a lower position.
この場合、第１リンク３０の取付け位置を第１位置に切換えても、第１，第２，第３リンク３０，３１，３２による平行リンクが維持されているため、間欠押え６の下限位置が変化しないので、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 In this case, even if the mounting position of the first link 30 is switched to the first position, the parallel link by the first, second and third links 30, 31, 32 is maintained, so the lower limit position of the intermittent presser 6 is Since there is no change, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified.
更に、間欠押え６の下限位置を低い位置に切換えた場合、前述したように、第２リンク３１はその姿勢を保持しながらリニアに下動するため、針板２から第２リンク３１の連結点Ｐ３までの高さＨ１と、針板２から間欠押え６の高さＨ２とは相互に比例関係（図１１参照）にあるので、第２リンク３１の上下移動による間欠押え６の上下移動調節が格段に簡単化する。 Furthermore, when the lower limit position of the intermittent presser 6 is switched to a low position, as described above, the second link 31 moves linearly while maintaining its posture, so that the connecting point of the second link 31 from the needle plate 2 Since the height H1 up to P3 and the height H2 from the needle plate 2 to the intermittent presser 6 are in a proportional relationship (see FIG. 11), the vertical movement adjustment of the intermittent presser 6 by the vertical movement of the second link 31 is possible. Remarkably simplified.
この状態で、図８−２に示すように、間欠押え６の上下動ストロークを小さくするために、第１リンク３０の取付け位置を下側の第１位置から上側の第２位置に切換えた場合、前述したように、間欠押え６の下限位置が変化しないため、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 In this state, as shown in FIG. 8B, in order to reduce the vertical movement stroke of the intermittent presser 6, the attachment position of the first link 30 is switched from the lower first position to the upper second position. As described above, since the lower limit position of the intermittent presser 6 does not change, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified. Can be planned.
ところで、揺動量微調節機構１６により摺動ピン２５を、図６−２に示すように大揺動位置に切換え、図９−１に示すように、第１リンク３０を下側の第１位置に切換え、駆動用ステッピングモータ４３により間欠押え６の下限位置を高い位置に切換える。このように、アーム付き環状部材２１のアーム部２１ａのレバー部材２３に対する連結位置をレバー部材２３の円弧穴２３ｂに沿って切換えることにより、レバー部材２３の揺動角、つまり第１レバー２４の揺動角を変更して、間欠押え６の上下動ストロークを微調節することができる。 By the way, the sliding pin 25 is switched to the large swing position as shown in FIG. 6B by the swing amount fine adjustment mechanism 16, and the first link 30 is moved to the lower first position as shown in FIG. And the lower limit position of the intermittent presser 6 is switched to a higher position by the driving stepping motor 43. In this way, by switching the connecting position of the arm portion 21a of the annular member 21 with the arm to the lever member 23 along the arc hole 23b of the lever member 23, the swing angle of the lever member 23, that is, the swing of the first lever 24 is changed. The vertical stroke of the intermittent presser 6 can be finely adjusted by changing the moving angle.
このように、間欠押え６の上下動ストロークを調節した場合、上下動ストロークの下限位置は変化する。しかし、針棒が所定位置において間欠押え６の上下動ストロークを調節する場合、円弧穴２３ｂを介してレバー部材２３が揺動することがなく、間欠押え６の下限位置が変化しないため、上下動ストロークの調節後に間欠押えの下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 As described above, when the vertical movement stroke of the intermittent presser 6 is adjusted, the lower limit position of the vertical movement stroke changes. However, when the needle bar adjusts the vertical movement stroke of the intermittent presser 6 at a predetermined position, the lever member 23 does not swing through the arc hole 23b, and the lower limit position of the intermittent presser 6 does not change. There is no need to readjust the lower limit position of the intermittent presser after adjusting the stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified.
この状態で、図９−２に示すように、間欠押え６の上下動ストロークを小さくするために、第１リンク３０の取付け位置を下側の第１位置から上側の第２位置に切換えた場合、前述したように、間欠押え６の下限位置が変化しないため、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 9-2, when the mounting position of the first link 30 is switched from the lower first position to the upper second position in order to reduce the vertical movement stroke of the intermittent presser 6 as shown in FIG. As described above, since the lower limit position of the intermittent presser 6 does not change, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified. Can be planned.
一方、針棒が所定位置のときに、図１０−１に示すように、摺動ピン２５は大揺動位置であり、第１リンク３０の取付け位置を上側の第２位置から下側の第１位置に切換え、しかも間欠押え６の下限位置を低い位置に切換える。 On the other hand, when the needle bar is in the predetermined position, as shown in FIG. 10A, the sliding pin 25 is in the large swing position, and the mounting position of the first link 30 is changed from the second position on the lower side to the second position on the lower side. The position is switched to 1 position, and the lower limit position of the intermittent presser 6 is switched to a lower position.
この場合、第１リンク３０の取付け位置を第１位置に切換えても、第１，第２，第３リンク３０，３１，３２による平行リンクが維持されているため、間欠押え６の下限位置が変化しないので、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 In this case, even if the mounting position of the first link 30 is switched to the first position, the parallel link by the first, second and third links 30, 31, 32 is maintained, so the lower limit position of the intermittent presser 6 is Since there is no change, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified.
更に、間欠押え６の下限位置を低い位置に切換えた場合、前述したように、第２リンク３１はその姿勢を保持しながらリニアに下動するため、第２リンク３１の連結点Ｐ３までの高さＨ１と、間欠押え６の高さＨ２とは相互に比例関係（図１１参照）にあるので、第２リンク３１の上下移動による間欠押え６の上下移動調節が格段に簡単化する。 Further, when the lower limit position of the intermittent presser 6 is switched to a low position, as described above, the second link 31 moves linearly while maintaining its posture, so that the height to the connection point P3 of the second link 31 is increased. Since the height H1 and the height H2 of the intermittent presser 6 are proportional to each other (see FIG. 11), the vertical movement adjustment of the intermittent presser 6 by the vertical movement of the second link 31 is greatly simplified.
この状態で、図１０−２に示すように、間欠押え６の上下動ストロークを小さくするために、第１リンク３０の取付け位置を下側の第１位置から上側の第２位置に切換えた場合、前述したように、間欠押え６の下限位置が変化しないため、上下動ストローク調節後に間欠押え６の下限位置調節をし直す必要がなく、間欠押え６の上下動ストロークの調節作業の簡単化を図ることができる。 In this state, as shown in FIG. 10-2, in order to reduce the vertical movement stroke of the intermittent presser 6, the attachment position of the first link 30 is switched from the lower first position to the upper second position. As described above, since the lower limit position of the intermittent presser 6 does not change, there is no need to readjust the lower limit position of the intermittent presser 6 after adjusting the vertical movement stroke, and the adjustment work of the vertical movement stroke of the intermittent presser 6 can be simplified. Can be planned.
また、上下動ストローク調節機構１４は、第１レバー２４の出力端部に形成された上下１対の連結穴２４ａ，２４ｂと、第２リンク３１の上端付近部に形成された上下１対の連結穴３１ｃ，３１ｄとを有するので、間欠押え６の上下動ストローク調節に際して、第１リンク３０の高さ位置を第１レバー２４の出力端部と第２リンク３１の上端付近部に形成した上下１対の連結穴２４ａ，３１ｃ、２４ｂ，３１ｄに夫々対応させるように位置切換えするだけでよく、第１リンク３０の高さ位置調節の簡単化を図ることができる。 Further, the vertical movement stroke adjusting mechanism 14 has a pair of upper and lower connection holes 24 a and 24 b formed at the output end of the first lever 24 and a pair of upper and lower connections formed near the upper end of the second link 31. Since the holes 31c and 31d are provided, when adjusting the vertical movement stroke of the intermittent presser 6, the height position of the first link 30 is formed at the output end of the first lever 24 and the vicinity of the upper end of the second link 31. It is only necessary to switch the position so as to correspond to the pair of connecting holes 24a, 31c, 24b, 31d, and the height position adjustment of the first link 30 can be simplified.
また、間欠押え下限位置調節機構１３は、第３リンク３２の長さ方向途中部を支える支持点部４８ａと、この支持点部４８ａの高さ位置を調節する高さ位置調節機構１５とを有するので、高さ位置調節機構１５により支持点部４８ａの高さ位置を変えるだけで第３リンク３２の長さ方向途中部の高さ位置を変更できるため、第３リンク３２に連結された第２リンク３１を介して間欠押え６の高さ位置を容易に調節することができる。 The intermittent presser lower limit position adjusting mechanism 13 includes a support point portion 48a that supports the middle portion of the third link 32 in the length direction, and a height position adjusting mechanism 15 that adjusts the height position of the support point portion 48a. Therefore, since the height position of the middle portion in the length direction of the third link 32 can be changed only by changing the height position of the support point portion 48a by the height position adjusting mechanism 15, the second position coupled to the third link 32 is obtained. The height position of the intermittent presser 6 can be easily adjusted via the link 31.
更に、第２リンク３１は縦リンク部３１ａと横リンク部３１ｂとからなるＬ形部材に形成され、横リンク部３１ｂが間欠押え６に連結されたので、横リンク部３１ｂの長さ如何で、間欠押え６の配置に対する第２リンク３１の配置の自由度を高めることができる。 Further, the second link 31 is formed as an L-shaped member composed of a vertical link portion 31a and a horizontal link portion 31b, and the horizontal link portion 31b is connected to the intermittent presser 6. The degree of freedom of the arrangement of the second link 31 with respect to the arrangement of the intermittent presser 6 can be increased.
次に、前記実施の形態の変更形態について説明する。 Next, a modified form of the embodiment will be described.
１〕図１２に示すように、揺動機構１１Ａの回動軸を第３リンク３２の連結点Ｐ４の後側に配置し、その回動軸に下端部を固着した上向きの第１レバー２４Ａの上端部に第１リンク３０を連結点Ｐ１で連結する。即ち、回動軸の軸心を連結点Ｐ４に合致させる。 1] As shown in FIG. 12, the pivoting shaft of the swing mechanism 11A is disposed on the rear side of the connection point P4 of the third link 32, and the upward first lever 24A having the lower end fixed to the pivoting shaft The first link 30 is connected to the upper end at a connection point P1. That is, the axis of the rotating shaft is made to coincide with the connection point P4.
この場合には、主軸５の回転に伴って、第１レバー２４Ａと第２リンク３１の揺動方向及びその揺動量が同一になる。それ故、縫製中であっても、これら第１レバー２４Ａと第１，第２，第３リンク３０，３１，３２により、常に理想的な平行リンク機構を実現させることができ、間欠押えの下限位置を調節する際の上下移動量を第２リンクの上下移動量により簡単に設定できる。 In this case, as the main shaft 5 rotates, the swing direction and the swing amount of the first lever 24A and the second link 31 become the same. Therefore, even during sewing, the first lever 24A and the first, second, and third links 30, 31, and 32 can always realize an ideal parallel link mechanism, and the lower limit of the intermittent presser foot. The vertical movement amount when adjusting the position can be easily set by the vertical movement amount of the second link.
２〕本発明は以上説明した実施例に限定されるものではなく、当業者であれば、本発明の趣旨を逸脱しない範囲で、前記実施例に種々の変更を付加して実施することができ、本発明はそれらの変更形態をも包含するものである。 2] The present invention is not limited to the embodiments described above, and those skilled in the art can implement the present invention with various modifications without departing from the spirit of the present invention. The present invention includes those modifications.
Ｍ 電子閂止めミシン
５ 主軸
６ 間欠押え
１０ 間欠押え上下駆動装置
１１ 揺動機構
１２ 上下動機構
１３ 間欠押え下限位置調節機構
１４ 上下動ストローク調節機構
１５ 高さ位置調節機構
２０ 偏心カム
２１ アーム付き環状部材
２２ 回動軸
２３ レバー部材
２３ｂ 円弧穴
２４ 第１レバー
２４Ａ 第１レバー
２４ａ 上側連結穴
２４ｂ 下側連結穴
３０ 第１リンク
３１ 第２リンク
３１ａ 縦リンク部
３１ｂ 横リンク部
３１ｃ 上側連結穴
３１ｄ 下側連結穴
３２ 第３リンク
４８ 支持レバー
４８ａ 支持点部
M Electronic bar clamp sewing machine 5 Spindle 6 Intermittent presser 10 Intermittent presser vertical drive device 11 Oscillating mechanism 12 Vertical movement mechanism 13 Intermittent presser lower limit position adjusting mechanism 14 Vertical movement stroke adjusting mechanism 15 Height position adjusting mechanism 20 Eccentric cam 21 Ring with arm Member 22 Rotating shaft 23 Lever member 23b Arc hole 24 First lever 24A First lever 24a Upper connection hole 24b Lower connection hole 30 First link 31 Second link 31a Vertical link part 31b Horizontal link part 31c Upper connection hole 31d Below Side connection hole 32 Third link 48 Support lever 48a Support point
Claims (7)
前記上下駆動装置が、
主軸の回転駆動力を受けて第１レバーを揺動させる揺動機構と、
前記第１レバーの出力端部分に連結されて間欠押えを上下駆動する上下動機構であって、前記第１レバーの出力端部に連結された横向きの第１リンクと、この第１リンクに連結されて下方へ延び且つ間欠押えに連結された第２リンクと、この第２リンクと機枠の枢支部とに亙って連結された横向きの第３リンクとを有し、針棒が所定位置のときに第１，第２，第３リンクが平行リンクとなるように構成された上下動機構と、
前記間欠押えの下限位置を調節する間欠押え下限位置調節機構と、
前記針棒が所定位置のときに前記平行リンクを維持したまま、第１リンクの位置を、間欠押えの上下動ストロークを大きくする第１位置と上下動ストロークを小さくする第２位置とに択一的に切換えることにより上下動ストロークを調節可能な上下動ストローク調節機構とを備えた、
ことを特徴とする間欠押え上下駆動装置。 Intermittent presser that presses the cloth to be sewn in conjunction with the vertical movement of the needle bar of the sewing machine, and a vertical drive with a drive force transmission system that converts the rotational drive force of the main shaft into a vertical drive force that moves the intermittent presser up and down In the device
The vertical drive device is
A swing mechanism that swings the first lever in response to the rotational driving force of the spindle;
A vertical movement mechanism that is connected to the output end portion of the first lever and drives the intermittent presser up and down, and is connected to the first link that is laterally connected to the output end portion of the first lever and to the first link. A second link that extends downward and is connected to the intermittent presser, and a lateral third link that is connected to the second link and the pivot of the machine frame. A vertical movement mechanism configured such that the first, second, and third links become parallel links at the time ,
An intermittent presser lower limit position adjusting mechanism for adjusting the lower limit position of the intermittent presser ;
While maintaining the parallel link when the needle bar is at a predetermined position, the position of the first link is selected as a first position for increasing the vertical movement stroke of the intermittent presser and a second position for decreasing the vertical movement stroke. With a vertical movement stroke adjustment mechanism that can adjust the vertical movement stroke by switching automatically,
An intermittent presser vertical drive device characterized by that.
前記レバー部材は、前記アーム部の連結位置を切換え可能にする為の円弧穴であって、前記偏心カムの中心の周りに円弧をなす円弧穴を有することを特徴とする請求項１〜５の何れかに記載の間欠押え上下駆動装置。 The swinging mechanism includes an annular member with an arm that reciprocates in a fixed direction by an eccentric cam connected to the main shaft, a rotating shaft that is connected to an end of the first lever and pivotally supported by a machine frame, A lever member extending from the rotation shaft and connected to the arm portion of the annular member with the arm,
6. The lever member according to claim 1, wherein the lever member is an arc hole for switching the connecting position of the arm part, and has an arc hole that forms an arc around the center of the eccentric cam . The intermittent presser vertical drive device according to any one of the above.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004312758A JP4605448B2 (en) | 2004-10-27 | 2004-10-27 | Intermittent presser vertical drive device and sewing machine |
| CN 200510119224 CN1766192B (en) | 2004-10-27 | 2005-10-27 | Intermittent presser foot up-down drive device and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004312758A JP4605448B2 (en) | 2004-10-27 | 2004-10-27 | Intermittent presser vertical drive device and sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006122230A JP2006122230A (en) | 2006-05-18 |
| JP4605448B2 true JP4605448B2 (en) | 2011-01-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004312758A Expired - Fee Related JP4605448B2 (en) | 2004-10-27 | 2004-10-27 | Intermittent presser vertical drive device and sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4605448B2 (en) |
| CN (1) | CN1766192B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121176B (en) * | 2006-08-28 | 2012-10-03 | 兄弟工业株式会社 | Sewing machine |
| JP5082462B2 (en) | 2007-01-24 | 2012-11-28 | 富士通株式会社 | COMMUNICATION DEVICE CONTROL PROGRAM, COMMUNICATION DEVICE, COMMUNICATION DEVICE CONTROL METHOD |
| WO2009157832A1 (en) * | 2008-06-26 | 2009-12-30 | Vsm Group Ab | A mechanically operated presser foot lift arrangement and a sewing machine comprising the arrangement |
| CN106637708A (en) * | 2015-11-04 | 2017-05-10 | 天津宝盈电脑机械有限公司 | Mechanism with pressing foot liftable |
| CN106377003B (en) * | 2016-11-10 | 2023-08-08 | 际华三五三四制衣有限公司 | Lining cap inserting machine |
| CN109576913A (en) * | 2017-09-29 | 2019-04-05 | Juki株式会社 | Middle foot device and sewing machine with foot device in this |
| JP7321641B2 (en) * | 2019-04-05 | 2023-08-07 | 株式会社ジャノメ | PRESSER UP/DOWN DRIVING DEVICE AND SEWING MACHINE INCLUDING SAME |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631875B2 (en) * | 1983-09-09 | 1988-01-14 | Mitsubishi Electric Corp | |
| JPH04332593A (en) * | 1991-05-01 | 1992-11-19 | Brother Ind Ltd | Sewing machine |
| JPH0744983B2 (en) * | 1986-07-03 | 1995-05-17 | ブラザー工業株式会社 | Sewing machine cloth presser |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3485341B2 (en) * | 1993-12-24 | 2004-01-13 | ジューキ株式会社 | Middle presser height adjustment device for sewing machine |
| TW363095B (en) * | 1997-05-09 | 1999-07-01 | Barudan Co Ltd | Suppresser of sewing machine |
| JP3945891B2 (en) * | 1998-02-27 | 2007-07-18 | Ｊｕｋｉ株式会社 | Middle presser mechanism of sewing machine |
-
2004
- 2004-10-27 JP JP2004312758A patent/JP4605448B2/en not_active Expired - Fee Related
-
2005
- 2005-10-27 CN CN 200510119224 patent/CN1766192B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631875B2 (en) * | 1983-09-09 | 1988-01-14 | Mitsubishi Electric Corp | |
| JPH0744983B2 (en) * | 1986-07-03 | 1995-05-17 | ブラザー工業株式会社 | Sewing machine cloth presser |
| JPH04332593A (en) * | 1991-05-01 | 1992-11-19 | Brother Ind Ltd | Sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006122230A (en) | 2006-05-18 |
| CN1766192B (en) | 2010-12-01 |
| CN1766192A (en) | 2006-05-03 |
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