JPH0142230B2 - - Google Patents
Info
- Publication number
- JPH0142230B2 JPH0142230B2 JP4018385A JP4018385A JPH0142230B2 JP H0142230 B2 JPH0142230 B2 JP H0142230B2 JP 4018385 A JP4018385 A JP 4018385A JP 4018385 A JP4018385 A JP 4018385A JP H0142230 B2 JPH0142230 B2 JP H0142230B2
- Authority
- JP
- Japan
- Prior art keywords
- needle bar
- rod
- sewing machine
- guide means
- fixed
- 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.)
- Expired
Links
- 238000009958 sewing Methods 0.000 claims description 22
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、千鳥あるいはボタン穴かがりミシン
のように針を左右に揺動させる機構を持ついわゆ
る本縫ジグザグミシンにおける針棒揺動機構の改
良に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is an improvement of the needle bar swinging mechanism in a so-called lockstitch zigzag sewing machine which has a mechanism for swinging the needle from side to side like a zigzag or buttonhole sewing machine. It is related to.
第２図に従来の工業用本縫ボタン穴かがりミシ
ン等のジグザグミシンの針棒揺動機構要部の一例
の斜視図を示す、同図は従来の公知例につき詳細
は省略して簡略に説明すると、７はミシンの上軸
（主軸）で、不図示のモータ等によりプーリｐを
介して図示矢印方向に回転駆動される。上軸７の
先端には釣合錘６が固設され、この釣合錘６上に
は天秤５とクランクロツド３を回動可能に固設し
ており、支点ねじ１８に針棒クランク１６が枢着
されている。クランクロツド３の先端は、針棒９
を抱いて固設された針棒抱き８上のピンと係合し
ている。１０は、ミシンの機枠（頭部、図示せ
ず）に固設された支点ピン１７まわりに図示矢印
Ｂ−Ｃ方向に往復揺動する針棒揺動台で、下端に
針１１を保持した針棒９は、この針棒揺動台１０
に上下方向に往復摺動可能に支持され、前記クラ
ンクロツド３により針棒抱き８を介して駆動され
る。一方、針棒揺動台１０の前記往復運動は、不
図示のモータにより上軸７を介して駆動される歯
車Ｇ揺動カムCM、針棒揺動二又ロツドＲを介し
て針棒揺動桿１２を揺動的に回動し、さらに揺動
腕１３とそれに固着されたピン１４及びピン１４
に係合して針棒揺動台１０の下部に回動自在に配
設された角駒１５を介して行われるように構成さ
れている。
Fig. 2 shows a perspective view of an example of the main part of the needle bar swinging mechanism of a zigzag sewing machine such as a conventional industrial lockstitch buttonhole sewing machine. This figure is a conventional known example, so details will be omitted and briefly explained. Then, reference numeral 7 denotes an upper shaft (main shaft) of the sewing machine, which is rotationally driven in the direction of the arrow shown in the figure via a pulley p by a motor (not shown) or the like. A counterweight 6 is fixed to the tip of the upper shaft 7. A balance 5 and a crank rod 3 are rotatably fixed on the counterweight 6, and a needle bar crank 16 is attached to a fulcrum screw 18. It is worn. The tip of the crank rod 3 is connected to the needle bar 9.
This engages with a pin on the needle bar holder 8, which is fixedly mounted to hold the needle bar holder 8. Reference numeral 10 denotes a needle bar rocking table that swings back and forth in the direction of arrow B-C in the figure around a fulcrum pin 17 fixed to the machine frame (head, not shown) of the sewing machine, and holds the needle 11 at the lower end. The needle bar 9 is attached to this needle bar oscillating base 10.
It is supported so as to be able to reciprocate and slide vertically, and is driven by the crank rod 3 via the needle bar holder 8. On the other hand, the reciprocating movement of the needle bar oscillating table 10 is caused by a gear G oscillating cam CM driven by a motor (not shown) via the upper shaft 7, and a needle bar oscillating forked rod R. The rod 12 is oscillatingly rotated, and the oscillating arm 13 and the pins 14 and 14 fixed thereto are
This is done through a square piece 15 that is engaged with and rotatably disposed at the lower part of the needle bar rocking table 10.
図中Ｗは油芯を示す。 In the figure, W indicates an oil wick.
しかしながら、このような従来のミシンにあつ
ては、ミシン運転中、第２図において、針棒揺動
桿１２にかかる荷重は、揺動腕１３と針棒揺動台
１０、角駒１５及び針棒９、針１１の慣性負荷と
各部品の摩擦抵抗による負荷の合計荷重がかか
る。又、一方別の荷重が揺動腕１３にかかる。 However, in such a conventional sewing machine, during operation of the sewing machine, the load applied to the needle bar swinging rod 12 in FIG. The total load is the inertial load of the rod 9 and needle 11 and the load due to the frictional resistance of each part. On the other hand, another load is applied to the swing arm 13.
この荷重とは上軸７の回転により、針棒クラン
クロツド３がクランク運動して、針棒抱き８を介
して針棒９を上下させるために生じる。 This load is generated because the rotation of the upper shaft 7 causes the needle bar crank rod 3 to make a crank movement, thereby raising and lowering the needle bar 9 via the needle bar holder 8.
針棒９には針棒９が上下するために針棒９及び
針棒クランロツド３の慣性負荷の横方向の分力が
働き、この荷重は揺動腕１３による針棒揺動のた
めに生じる荷重よりも何倍か大きい。 As the needle bar 9 moves up and down, a lateral component of the inertia load of the needle bar 9 and the needle bar crank rod 3 acts on the needle bar 9, and this load is a load generated due to the swinging of the needle bar by the swinging arm 13. several times larger than
この揺動腕１３にかかる慣性力のため揺動腕１
３に連結している部分が異常な力を受け摩耗した
り、ミシンモータに余分な負荷がかかるという問
題点があつた。 Because of the inertial force applied to this swinging arm 13, the swinging arm 1
There were problems in that the parts connected to the sewing machine 3 were subject to abnormal force and wore out, and that extra load was placed on the sewing machine motor.
この発明は以上のような問題点に着目してなさ
れたもので、ジグザグミシンにおいて高速運転に
対応できると共に摩耗を防止し、ミシンモータに
余分な負荷を生じさせないミシンの針棒揺動機構
を提供することを目的とする。
This invention was made in view of the above-mentioned problems, and provides a needle bar swing mechanism for a sewing machine that can handle high-speed operation in a zigzag sewing machine, prevents wear, and does not create extra load on the sewing machine motor. The purpose is to
このため、本発明においては、従来のクランク
ロツドと針棒間を固定台及びロツドを介して連結
すると共に固定台を一固定軸線を中心に上下動す
るよう案内させるようにして高速化に対応できる
ように構成したものである。
For this reason, in the present invention, the conventional crank rod and needle bar are connected via a fixed base and a rod, and the fixed base is guided to move up and down around a fixed axis in order to cope with higher speeds. It is composed of
以下に本発明を実施例に基づいて説明する。第
１図は、本発明による針棒揺動機構の一実施例の
要部斜視図で、前出従来例第２図相当図であるが
第２図右方の駆動機構部は省略し、また第８図と
同一または相当部分は同一符号で示し、その部分
の重複説明は省略する。
The present invention will be explained below based on examples. FIG. 1 is a perspective view of essential parts of an embodiment of the needle bar swinging mechanism according to the present invention, and is a view corresponding to FIG. 2 of the prior art example, but the drive mechanism section on the right side of FIG. 2 is omitted, and The same or equivalent parts as in FIG. 8 are indicated by the same reference numerals, and redundant explanation of those parts will be omitted.
第１図において、１は本発明による案内手段と
しての補助棒で、不図示の機枠（ミシン頭部）に
上下方向に往復摺動可能に取付けられている。こ
の補助棒１は中間部に固定台４が固着され、その
対向面には棒軸心と垂直方向に直角に支持軸４
ａ，４ｂが穿設されている。支持軸４ａにはクラ
ンクロツド３の先端が枢着係合し、上軸７の回転
により釣合い錘６、針棒クランク１６、クランク
ロツド３を介して固定台４および補助棒１がクラ
ンク運動によつて上下往復運動を行う。一方、一
対の他の支持軸４ｂには、ロツド２が枢着係合
し、ロツド２の他端は、針棒抱き８の有する支持
軸（図示せず）に支持軸４ｂと平行に枢着係合す
るよう構成してある。 In FIG. 1, reference numeral 1 denotes an auxiliary rod as a guide means according to the present invention, which is attached to a machine frame (sewing machine head) (not shown) so as to be able to slide back and forth in the vertical direction. This auxiliary rod 1 has a fixed base 4 fixed to its middle part, and a support shaft 4 is mounted on the opposite surface at right angles to the axis of the rod.
a and 4b are drilled. The tip of the crank rod 3 is pivotally engaged with the support shaft 4a, and the rotation of the upper shaft 7 causes the fixed base 4 and the auxiliary rod 1 to move up and down through the counterweight 6, needle bar crank 16, and crank rod 3. Perform reciprocating movements. On the other hand, a rod 2 is pivotally engaged with a pair of other support shafts 4b, and the other end of the rod 2 is pivotally connected to a support shaft (not shown) of a needle bar holder 8 in parallel with the support shaft 4b. They are configured to engage with each other.
１９は針棒抱き８の針棒９への固定ねじであ
る。２０は揺動モータとしてのパルスモータで、
機枠に固定してあり、上軸７と同期して回転軸が
揺動するようになつている。 Numeral 19 is a fixing screw for fixing the needle bar holder 8 to the needle bar 9. 20 is a pulse motor as a swing motor,
It is fixed to the machine frame, and the rotating shaft swings in synchronization with the upper shaft 7.
パルスモータ２０は機枠に回動可能に支持した
針棒揺動桿１２とカツプリング２１を介して連結
している。 The pulse motor 20 is connected via a coupling ring 21 to a needle bar swinging rod 12 rotatably supported on the machine frame.
針棒揺動桿１２の他端は針棒揺動台１０の下部
に上下動可能に支持した角駒１５を有する揺動腕
１３が固定してある。 At the other end of the needle bar swing rod 12, a swing arm 13 having a square piece 15 supported vertically and movably is fixed to the lower part of the needle bar swing table 10.
この揺動腕１３には揺動回腕１３が揺動可能な
よう第１図に示すように補助棒１が挿通する補助
棒１の径より大きい孔１３ａが開口している。 This swinging arm 13 has a hole 13a which is larger in diameter than the diameter of the auxiliary rod 1 through which the auxiliary rod 1 is inserted, as shown in FIG. 1, so that the swinging arm 13 can swing.
そして第１図Ａ方向から見て針棒揺動桿１２の
軸心と上軸７の軸心と補助棒１の軸線とが一致す
るように構成するのが望ましい。 It is preferable that the axis of the needle bar swinging rod 12, the axis of the upper shaft 7, and the axis of the auxiliary rod 1 coincide with each other when viewed from the direction A in FIG.
次にこの発明の作用を説明する。 Next, the operation of this invention will be explained.
上軸７の回動によつて釣合錘６が回動し、これ
によつてクランクロツド３を介して固定台４が補
助棒１に案内されながら上下動する。 The rotation of the upper shaft 7 causes the counterweight 6 to rotate, thereby causing the fixed base 4 to move up and down while being guided by the auxiliary rod 1 via the crank rod 3.
固定台４の上下動によつてロツド２も上下動
し、針棒抱き８を介して針棒９を上下動する。 As the fixed base 4 moves up and down, the rod 2 also moves up and down, and the needle bar 9 is moved up and down via the needle bar holder 8.
また、パルスモータ２０は上軸７と同期して
（即ち針１１が針板（図示せず）上にあるときの
み作動する）揺動し、カツプリング２１、揺動腕
１３、角駒１５を介して針棒揺動台１０を支点ピ
ン１７を中心に揺動し、前述の針棒９の上下動と
揺動台１０の揺動とによりジグザグ縫いが行なわ
れる。 Further, the pulse motor 20 swings in synchronization with the upper shaft 7 (that is, it operates only when the needle 11 is on the needle plate (not shown)), and the The needle bar oscillating table 10 is swung around the fulcrum pin 17, and zigzag stitching is performed by the above-mentioned vertical movement of the needle bar 9 and rocking of the oscillating table 10.
この際、前記補助棒１には釣合錘６とクランク
ロツド３のクランク運動による慣性負荷の横方向
の分力が作用し、これを吸収する。その後、補助
棒１に案内された固定台４及びこれと連結したロ
ツド２によつて針棒９が上下動するので針棒９に
は垂直方向の荷重のみがかかり横方向の分力はほ
とんどなくなる。 At this time, a lateral component of the inertial load due to the crank motion of the counterweight 6 and crank rod 3 acts on the auxiliary rod 1, and absorbs this force. After that, the needle bar 9 is moved up and down by the fixed base 4 guided by the auxiliary bar 1 and the rod 2 connected thereto, so that only the vertical load is applied to the needle bar 9, and the lateral component force is almost eliminated. .
このため針棒揺動桿１２にかかる荷重は針棒９
を揺動することによる針棒９と針棒揺動台１０及
び揺動腕１３の慣性による負荷のみがかかり、そ
の他は前述のように補助棒１によつて吸収され
る。このため従来の機構による針棒揺動桿１２に
かかる負荷荷重の数分の一と小さくなり、パルス
モータ２０にかかる負荷も小さくなり、高速運転
が可能となる。 Therefore, the load applied to the needle bar swinging rod 12 is
Only the load due to the inertia of the needle bar 9, needle bar swing table 10, and swing arm 13 due to swinging is applied, and the rest is absorbed by the auxiliary bar 1 as described above. Therefore, the load applied to the needle bar swinging rod 12 by the conventional mechanism is reduced to a fraction of that, and the load applied to the pulse motor 20 is also reduced, making high-speed operation possible.
この実施例では、案内手段として機枠に上下動
可能に支持した丸棒の補助棒１を示したが、補助
棒１を機枠に固定し固定台４が補助棒１に対して
上下動可能としてもよい。
In this embodiment, a round auxiliary rod 1 supported on the machine frame so as to be movable up and down as a guide means is shown, but the auxiliary rod 1 is fixed to the machine frame and the fixed base 4 is movable up and down relative to the auxiliary rod 1. You can also use it as
また補助棒１に代え、案内手段として固定台４
を両側面から摺動可能に挟む案内面を機枠に固定
形成してもよい。 Also, instead of the auxiliary rod 1, a fixed base 4 is used as a guide means.
It is also possible to form a guide surface fixed to the machine frame so as to be able to slide between the two sides.
尚、揺動腕１３を揺動させる機構はパルスモー
タ２０を用いなくても従来の機構でもよい。 Note that the mechanism for swinging the swinging arm 13 may be a conventional mechanism without using the pulse motor 20.
〔発明の効果〕
以上述べたように、この発明の針棒揺動機構に
よれば、案内手段を介して、針棒を上下動するこ
とにより、釣合錘６等の横方向の慣性力を案内手
段が吸収できるので、ミシンモータにかかる負荷
が小さくすることが可能となるので、高速化が図
れると共に各部品に加わる負荷を小さくでき、部
品の摩耗やガタを防止でき、ミシンの寿命を長く
することができという効果がある。[Effects of the Invention] As described above, according to the needle bar swinging mechanism of the present invention, by moving the needle bar up and down through the guide means, the lateral inertia of the counterweight 6, etc. is reduced. Since the guide means can absorb the load, it is possible to reduce the load on the sewing machine motor, which increases speed and reduces the load applied to each part, prevents wear and rattling of parts, and extends the life of the sewing machine. There is an effect that can be done.
第１図は、本発明による針棒揺動機構の一実施
例の要部斜視図、第２図は従来のジグザグミシン
の針棒揺動機構の要部斜視図である。
１……案内手段としての補助棒、２……ロツ
ド、３……クランクロツド、４……固定台、４
ａ，４ｂ……支持軸、７……上軸、９……針棒、
１０……針棒揺動台、１１……針、１２……針棒
揺動桿。
FIG. 1 is a perspective view of a main part of an embodiment of a needle bar swinging mechanism according to the present invention, and FIG. 2 is a perspective view of a main part of a needle bar swinging mechanism of a conventional zigzag sewing machine. 1...Auxiliary rod as a guide means, 2...Rod, 3...Crank rod, 4...Fixing base, 4
a, 4b...Support shaft, 7...Upper shaft, 9...Needle bar,
10... Needle bar swinging stand, 11... Needle, 12... Needle bar swinging rod.
Claims (1)
を機枠に回動可能に支持した揺動腕に連結した針
棒揺動台と、 針棒揺動台に上下動可能に支持し先端に針を有
する針棒と、 針棒に回動可能に支持したロツドと、 ミシン主軸に連動して上下動するクランクロツ
ドと、 クランクロツドとロツドとに回動可能に支持し
た固定台と、 機枠に支持し、固定台を一固定軸線に沿つて上
下動可能に案内する案内手段とよりなるミシンの
針棒揺動機構。 ２ 前記案内手段は機枠に上下動可能に支持さ
れ、固定台は案内手段に固定されていることを特
徴とする特許請求の範囲第１項記載のミシンの針
棒揺動機構。 ３ 前記案内手段は機枠に固定され、固定台は案
内手段に移動可能に嵌合されていることを特徴と
する特許請求の範囲第１項記載のミシンの針棒揺
動機構。[Scope of Claims] 1. A needle bar rocking stand connected to a rocking arm whose upper part is rotatably supported on a sewing machine frame and whose lower part is rotatably supported on the machine frame; A needle bar supported so as to be vertically movable and having a needle at its tip; a rod rotatably supported on the needle bar; a crank rod movable vertically in conjunction with the main shaft of the sewing machine; and rotatably supported on the crank rod and the rod. A needle bar swing mechanism for a sewing machine comprising a fixed base and a guide means supported on a machine frame and guiding the fixed base so as to be movable up and down along a fixed axis. 2. The needle bar swinging mechanism for a sewing machine according to claim 1, wherein the guide means is supported by the machine frame so as to be movable up and down, and the fixed base is fixed to the guide means. 3. The needle bar swinging mechanism for a sewing machine according to claim 1, wherein the guide means is fixed to the machine frame, and the fixing base is movably fitted to the guide means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4018385A JPS61199884A (en) | 1985-02-28 | 1985-02-28 | Needle rod shaking mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4018385A JPS61199884A (en) | 1985-02-28 | 1985-02-28 | Needle rod shaking mechanism of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61199884A JPS61199884A (en) | 1986-09-04 |
| JPH0142230B2 true JPH0142230B2 (en) | 1989-09-11 |
Family
ID=12573666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4018385A Granted JPS61199884A (en) | 1985-02-28 | 1985-02-28 | Needle rod shaking mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61199884A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003024664A (en) * | 2001-07-13 | 2003-01-28 | Juki Corp | Needle swinging device for sewing machine |
-
1985
- 1985-02-28 JP JP4018385A patent/JPS61199884A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61199884A (en) | 1986-09-04 |
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