JP4450947B2 - Sewing machine needle swing device - Google Patents

Sewing machine needle swing device Download PDF

Info

Publication number
JP4450947B2
JP4450947B2 JP2000136782A JP2000136782A JP4450947B2 JP 4450947 B2 JP4450947 B2 JP 4450947B2 JP 2000136782 A JP2000136782 A JP 2000136782A JP 2000136782 A JP2000136782 A JP 2000136782A JP 4450947 B2 JP4450947 B2 JP 4450947B2
Authority
JP
Japan
Prior art keywords
needle bar
bar support
support base
needle
pressing member
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 - Fee Related
Application number
JP2000136782A
Other languages
Japanese (ja)
Other versions
JP2001314673A5 (en
JP2001314673A (en
Inventor
寿之 岩田
性宝 応
稔 和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Juki Corp
Original Assignee
Juki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Juki Corp filed Critical Juki Corp
Priority to JP2000136782A priority Critical patent/JP4450947B2/en
Priority to KR1020010024507A priority patent/KR100794398B1/en
Priority to CZ20011621A priority patent/CZ300358B6/en
Priority to CNB011158522A priority patent/CN1321235C/en
Publication of JP2001314673A publication Critical patent/JP2001314673A/en
Publication of JP2001314673A5 publication Critical patent/JP2001314673A5/ja
Application granted granted Critical
Publication of JP4450947B2 publication Critical patent/JP4450947B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B71/00—Lubricating or cooling devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2305/00—Operations on the work before or after sewing
    • D05D2305/32—Measuring
    • D05D2305/36—Quality control

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、針を布送り方向と直交する方向に交互に振りながら、いわゆるジグザグ縫いを行うミシンにおける針振り装置に関するものである。
【０００２】
【従来の技術】
ミシンの針振り装置として、従来、図６に示すものが知られている（実公昭６１−８８４３号公報参照）。この針振り装置は、針棒揺動台２と、ステッピングモータ４と、作動体６と、揺動体８と、連動体１０とよりなっている。針棒揺動台２は、主軸１２に連動して上下動する針棒１４を上下方向の摺動が可能なように支持すると共に、布送り方向と直交する方向に揺動可能に支軸１６に支持されている。
【０００３】
針棒１４はその下端に針１８を取り付けられている。ステッピングモータ４は、その出力軸４ａを針棒揺動台２の布送り方向に向けている。作動体６は、その一端がステッピングモータ４の出力軸４ａに固定され他端に作動軸６ａが突設されている。揺動体８は、布送り方向に向いた機枠の支軸１７に一端が回動可能に支持され、作動体６の作動軸６ａが係合して回動可能とする長孔８ａが他端側に形成されている。連動体１０は、針棒揺動台２と揺動体８のそれぞれの中間部にそれぞれ連結ピン１０ａ，１０ｂにより回動可能に連結されている。
【０００４】
そして、この針振り装置は、一針毎にステッピングモータ４を任意の位相角度振らせることにより、揺動体８、連動体１０を介して針棒揺動台２を布送り方向と直交する方向に振らせ、様々な縫い目を形成することができる。
【０００５】
【発明が解決しようとする課題】
このように針振り装置は、一針毎に針１８を布送り方向と直交する方向に振るのであるが、高速で運転する際には毎分数千の針数で縫製を行うので、ステッピングモータ４も毎分数千回の回転制御を行うことになる。このように高速回転による制御であることに加えて、ステッピングモータ４で動かす部材（針棒揺動台２、揺動体８、連動体１０等）の重量が大きいので、脱調により、針１８を所要の針振り位置に停止させることが困難なことがある。すなわち、ステッピングモータ４の回転出力の変動や部材の慣性力に起因するオーバーランを生じて、所要の針位置を越えて停止することがある。或いは、部材の振動に伴う負荷変動により、オーバーランを生じて所要の針位置を越えて停止することがある。
【０００６】
このように針１８を所要の位置に停止させることができないと、所要の縫い目が形成されない。オーバーランが大きいと、針１８に大きな負荷がかかって針が折れるおそれもある。
【０００７】
従って本発明の目的は、ステッピングモータの脱調による針振り装置のオーバーランを防ぐことができる針振り装置を提供することにある。
【０００８】
【課題を解決するための手段】
上記課題を解決するために、請求項１記載の発明は、
針棒を上下動可能に支持する針棒支持台と、
一端が前記針棒支持台に固定された針棒支持台軸と、
ミシンフレームに固定され、前記針棒支持台軸を軸方向に移動可能に支持する２つの軸受メタルと、
前記針棒支持台を布送り方向と直交する方向に移動制御する針振りモータと、
前記針支持台軸へ摺動抵抗を付与する押圧力付与手段と、を備え、
前記押圧力付与手段が、
前記２つの軸受けメタル間に配置されるとともに、前記針棒支持台軸を囲む円筒形状の押圧部材と、
前記針棒支持台軸を囲む円筒形状に形成されるとともに、その外径が装着されるミシンフレームの貫通孔より小さく形成され、且つ、その軸方向長さが、前記２つの軸受けメタルとの間に軸方向に所定量の隙間を形成するように規定された
前記押圧部材に対応する位置に、ミシンフレームに形成されたねじ穴と、
前記ねじ穴に挿入され、前記押圧部材にラジアル方向内側への付勢力を付与する弾性体と、
前記ねじ穴に装着され、一端側が前記弾性部材に当接するねじとを備え、
前記ねじにより前記弾性体の付勢力を調節して、前記針棒支持台軸と前記押圧部材との間の摺動抵抗を調整する構成とした。
請求項２記載の発明は、請求項１記載の発明に加えて、
前記押圧部材はその外径部から内径部へ通じる給油穴を有し、前記ねじ穴と前記給油穴を通じて前記押圧部材と針棒支持台軸との摺動面にグリースを注入可能である構成とした。
【００１３】
【発明の実施の形態】
図１〜５を参照して本発明のミシンの針振り装置の実施の形態を説明する。この針振り装置は、針棒支持台２０と、ステッピングモータ４と、針振りリンク２２と、針棒支持台軸２４とを備えている。針棒１４は、その下端に針１８が取付けられ、上軸（ミシン主軸）１２に連動して上下動する。針棒支持台２０はこの針棒１４を、上下動可能なように支持する。ステッピングモータ４は、その出力軸４ａを正逆いずれの方向にも間欠回動可能である。
【００１４】
ステッピングモータ４の出力軸４ａには針振り駆動腕２６（連結部材）が固定され、針振り駆動腕２６には針振りリンクピン２８を介して針振りリンク２２（連結部材）の一端が回動可能に連結されている。針棒支持台軸２４は、針棒支持台軸抱き３０を介して一端が針振りリンクピン３２により針振りリンク２２の他端に連結されると共に、他端が針棒支持台２０に固定されている。この針棒支持台軸２４は、ミシンフレーム３４のアーム部の下部に取付けられている第１及び第２の針棒支持台軸受３６，３８に軸方向の摺動が可能なように支持されている。
【００１５】
ステッピングモータ４の出力軸４ａが回転すると、針振り駆動腕２６及び針振りリンク２２を介して、針棒支持台軸２４が往復運動をする。この針棒支持台軸２４の往復運動による針棒１４の左右方向（図１の矢印方向）の往復運動と、それに直交する布送りの組み合せにより、ジグザグ縫いがなされる。
【００１６】
第１及び第２の針棒支持台軸受３６，３８のうち前方に配置された第１の針棒支持台軸受３６は軸受メタルで、ミシンフレーム３４に固定されている。第２の針棒支持台軸受３８は、２個の軸受メタル４０，４４と、これら２つの軸受メタルの間に配置された１個のカラー（押圧部材）４２から構成されている。２つの軸受メタル４０，４４は同じ形状であり、図４に示されるように、その外径４４ａはミシンフレーム３４に形成された貫通孔３４ａの内径よりも若干大きくされている。従って、軸受メタル４０，４４は貫通孔３４ａへ圧入されてミシンフレーム３４に固定される。
【００１７】
一方、中央の押圧部材４２の外径４２ａは貫通孔３４ａの内径よりも若干小さくされている。また、押圧部材４２と２個の軸受メタル４０，４４の間には軸方向に若干の隙間が形成されるように配置されている。従って押圧部材４２には貫通孔３４ａに対してラジアル方向に遊びを与えられていると共に両側の軸受メタル４０，４４に対しても軸方向に遊びを与えられている。
【００１８】
図３に示されるようにミシンフレーム３４には、押圧部材４２に対応する位置へねじ穴４６が形成されている。このねじ穴４６には、ばね４８が挿入され、押圧部材４２へラジアル方向内側への付勢力を与えている。この付勢力により、押圧部材４２は針棒支持台軸２４に押圧されるので、針棒支持台軸２４と押圧部材４２との間に摺動抵抗が生じる。ばね４８を用いているので、上記の摺動抵抗は長期間に渡ってほぼ一定の値を保つ。この摺動抵抗の大きさはねじ５０，５２により調整可能である。なお、２個のねじ５０，５２を用いるのは、緩み防止のためであるが１個のねじだけとしてもよい。
【００１９】
押圧部材４２と２個の軸受メタル４０，４４はいずれも内径部に溝４０ｂ，４２ｂ，４４ｂが形成されている。また、押圧部材４２には、外径部から溝４２ｂと連絡する小孔４２ｃが形成されている。ミシンフレーム３４のねじ穴４６からグリース等の潤滑油を注入することにより、小孔４２ｃを通じて押圧部材４２と針棒支持台軸２４との摺動面及び軸受メタル４０，４４と針棒支持台軸２４との摺動面に給油することができる。第２の針棒支持台軸受３８においては通常の軸受としての摺動に加えて、コイルばね４８により押圧部材４２へ付勢力が加えられるので、このように給油可能な構成とすることが好ましい。
【００２０】
本実施の形態においては上記のように押圧部材４２の外径４２ａを小さくしてミシンフレーム３４の貫通孔３４ａの内径との間にラジアル方向に隙間が形成されると共に、２個の軸受メタル４０，４４及び押圧部材４２の間に軸方向に隙間が形成されるので、これらの隙間に潤滑油を保持することができる。更に押圧部材４２の端面４２ｄには図５に示されるように凹凸が形成されている。この凹凸により、更に潤滑油が保持されやすくなる。このように本実施の形態においては、第２の針棒支持台軸受３８内での潤滑油の保持力を大きくされている。従って、押圧部材４２を用いて針棒支持台軸２４へ摺動力を与えることに伴う焼き付きや摩耗を防止すると共に給油回数を減らすことができる。
【００２１】
押圧部材４２と針棒支持台軸２４は、金属、セラミックス素材或いはセラミックス薄膜で摺動面をコーティングされた材料から構成される。例えば、押圧部材４２は金属材料で構成し、針棒支持台軸２４は金属材料であるがその摺動面のみをセラミックス薄膜でコーティングしたものとすることができる。
【００２２】
中央の押圧部材４２の軸方向の遊び、すなわち両側の軸受メタル４０，４４との間の隙間を、特に０．０１〜０．５ｍｍとすると、ステッピングモータ４の脱調によるオーバーランを効果的に防止することができる。また、押圧部材４２と軸受けメタル４０、４４との衝突音を防止することができる。
【００２３】
本発明を図面に示した実施の形態に基づいて説明したが、本発明はこの実施の形態には限定されず種々変形可能である。例えば、押圧部材４２の構造として針棒支持台軸２４を囲む円筒形状のカラーの例を示したが、この円筒形状の部材を軸方向に半分に切断して半円筒形状とした押圧部材を用いることができる。このように円筒形状或いは半円筒形状とする以外に、針棒支持台軸２４へラジアル方向に押圧力を付与するための押圧力付与手段としては様々の構造のものが採用可能である。しかしながら、円筒形状或いは半円筒形状の押圧部材４２を用いて針棒支持台軸２４を囲む場合には、ばね４８により押圧したときに針棒支持台軸２４との接触が理想的な面接触に近くなる。このように接触面積を広くすることにより、偏摩耗を防ぐと共に偏摩耗に伴うガタをなくすることができるので好ましい。
また、本発明では、押圧部材の材質は、軸受け機能を有するので、リンセイ銅を用いたが、これに代えて押圧部材の材質をばね材とすると、本実施形態のばね４８を省略することも容易に考えられる。また、押圧部材にオイルシールを用いて、針棒支持台軸に摺動摩擦を付与することも容易に考えられる。
【００２４】
また、第１及び第２の針棒支持台軸受３６，３８のうち、ミシン後方側の第２の針棒支持台軸受３８が押圧部材４２を備える例を示したが、前方側の第１の針棒支持台軸受３６が押圧部材４２を備え、第２の針棒支持台軸受３８を単一の軸受メタル軸受とすることもできる。
【００２５】
更に、押圧部材４２をラジアル方向内側に付勢する弾性体としてコイルばね４８を用いた例を示したが、板ばね等を用いることもできる。押圧部材４２を正面側から水平方向に付勢する例を示したが、上方から下方へ、或いは下方から上方へ、裏面側から水平方向に付勢することができる。
【００２６】
【発明の効果】
本発明によれば、針棒支持台軸へラジアル方向に押圧力を付与する押圧力付与手段を設けたので、針棒支持台軸の水平移動に対する摺動抵抗となり、所要の針振り位置にて停止し易くなる。従って、ステッピングモータの脱調による針振り装置のオーバーランを防ぐことができる。
【００２７】
押圧力付与手段を、針棒支持台軸を囲む円筒形状または半円筒形状の押圧部材を備える構成とした場合には、針棒支持台軸との接触面積が広くなるので、片摩耗及びガタが生じにくくなる。
【００２８】
押圧力付与手段は、押圧部材をラジアル方向に付勢する弾性体を備える構成とすれば、長期間に渡ってほぼ一定の押圧力を保持可能となる。
【００２９】
弾性体と当接するねじを備え、押圧力はねじにより調整可能である構成とすれば、縫製結果に応じて簡便に押圧力を調整できる。
【００３０】
押圧力付与手段は、ミシンフレームに固定され、針棒支持台軸を軸方向に移動可能に支持する２つの軸受メタルと、これら２つの軸受メタルの間に配置された押圧部材を備える構成とし、押圧部材とミシンフレームとの間にはラジアル方向に隙間を形成した場合には、押圧部材は移動可能となり、針棒支持台軸を押圧可能となると共に、その隙間内に潤滑油を保持可能となる。
【００３１】
押圧部材は２つの軸受メタルとの間に隙間を形成した場合には、軸受メタルとは独立に移動可能となり、針棒支持台軸を押圧可能となる。また、この隙間に潤滑油を保持可能となる。
【００３２】
押圧部材はその外径部から内径部へ通じる給油穴を有する構成とした場合には、外径部側から内径部側（針棒支持台軸との摺動部）へ給油可能となるので、焼き付き、摩耗防止の観点から効果的である。
【００３３】
そして、弾性体及びねじを挿通する穴をミシンフレームに形成し、この穴と給油穴を通じて押圧部材と針棒支持台軸との摺動面へ潤滑油を注入可能な構成とすることにより、簡便に給油可能となり、焼き付き、摩耗防止の観点から効果的である。
【図面の簡単な説明】
【図１】 本実施の形態の針振り装置の全体を示す図である。
【図２】 本実施の形態の針棒支持台軸の支持構造を示す断面図である。
【図３】 図２のIII-III断面図である。
【図４】 本実施の形態の針棒支持台軸受及び押圧部材の断面図である。
【図５】 本実施の形態の押圧部材を示す斜視図である。
【図６】 従来の針振り装置の斜視図である。
【符号の説明】
４...ステッピングモータ １４...針棒 ２０...針棒支持台
２４...針棒支持台軸 ３４...ミシンフレーム
４０，４４...軸受メタル ４２...カラー（押圧部材）
４８ばね...（弾性体） ５０，５２...ねじ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a needle swing device in a sewing machine that performs so-called zigzag sewing while alternately swinging a needle in a direction orthogonal to a cloth feeding direction.
[0002]
[Prior art]
As a sewing machine needle swinging device, the one shown in FIG. 6 is conventionally known (see Japanese Utility Model Publication No. 61-8843). This needle swing device includes a needle bar swing base 2, a stepping motor 4, an operating body 6, a swing body 8, and an interlocking body 10. The needle bar swinging table 2 supports a needle bar 14 that moves up and down in conjunction with the main shaft 12 so that the needle bar 14 can slide in the vertical direction, and the support shaft 16 can swing in a direction perpendicular to the cloth feeding direction. It is supported by.
[0003]
The needle bar 14 has a needle 18 attached to the lower end thereof. The stepping motor 4 has its output shaft 4 a directed in the cloth feeding direction of the needle bar rocking base 2. One end of the operating body 6 is fixed to the output shaft 4 a of the stepping motor 4, and the operating shaft 6 a protrudes from the other end. One end of the oscillating body 8 is rotatably supported by a support shaft 17 of the machine frame that faces in the cloth feeding direction, and the other end has a long hole 8a that can be rotated by engaging the operating shaft 6a of the operating body 6. Formed on the side. The interlocking body 10 is rotatably connected to intermediate portions of the needle bar swing base 2 and the swing body 8 by connecting pins 10a and 10b, respectively.
[0004]
This needle swinging device swings the stepping motor 4 at an arbitrary phase angle for each stitch, thereby moving the needle bar swinging table 2 in a direction orthogonal to the cloth feeding direction via the swinging member 8 and the interlocking member 10. It can be swung to form various seams.
[0005]
[Problems to be solved by the invention]
In this way, the needle swinging device swings the needle 18 in a direction perpendicular to the cloth feeding direction for each stitch. However, when operating at a high speed, sewing is performed with several thousand stitches per minute. 4 also performs rotation control several thousand times per minute. In addition to the high-speed rotation control, the weight of the members (needle bar rocking base 2, rocking body 8, interlocking body 10, etc.) moved by the stepping motor 4 is large. It may be difficult to stop at the required needle swing position. In other words, an overrun caused by fluctuations in the rotational output of the stepping motor 4 or the inertial force of the member may occur, and may stop beyond the required needle position. Alternatively, an overrun may occur due to a load variation accompanying the vibration of the member, and stop beyond a required needle position.
[0006]
Thus, if the needle | hook 18 cannot be stopped in a required position, a required seam will not be formed. If the overrun is large, a large load is applied to the needle 18 and the needle may be broken.
[0007]
Accordingly, an object of the present invention is to provide a needle swinging device that can prevent an overrun of the needle swinging device due to a stepping motor stepping out.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1
A needle bar support that supports the needle bar so as to be movable up and down;
A needle bar support base shaft having one end fixed to the needle bar support base;
Two bearing metals fixed to a sewing machine frame and supporting the needle bar support base shaft movably in the axial direction;
A needle swing motor that controls movement of the needle bar support in a direction orthogonal to the cloth feeding direction;
Pressing force applying means for applying sliding resistance to the needle support base shaft,
The pressing force applying means is
A cylindrical pressing member disposed between the two bearing metals and surrounding the needle bar support base shaft;
It is formed in a cylindrical shape surrounding the needle bar support base shaft, and its outer diameter is smaller than the through hole of the sewing machine frame to be mounted, and its axial length is between the two bearing metals. A screw hole formed in the sewing machine frame at a position corresponding to the pressing member defined to form a predetermined amount of gap in the axial direction ;
An elastic body that is inserted into the screw hole and applies an urging force radially inward to the pressing member;
A screw attached to the screw hole and having one end abutting against the elastic member;
The urging force of the elastic body is adjusted by the screw to adjust the sliding resistance between the needle bar support base shaft and the pressing member.
In addition to the invention described in claim 1, the invention described in claim 2
The pressing member includes an oil supply hole leading from the outer diameter to the inner diameter portion, and constitutes the grease can be injected into the sliding surface between the pressing member and the needle bar support platform shaft through the oil supply hole and the threaded hole did.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a needle swinging device for a sewing machine according to the present invention will be described with reference to FIGS. This needle swing device includes a needle bar support base 20, a stepping motor 4, a needle swing link 22, and a needle bar support base shaft 24. The needle bar 14 has a needle 18 attached to the lower end thereof and moves up and down in conjunction with the upper shaft (sewing machine main shaft) 12. The needle bar support 20 supports the needle bar 14 so that it can move up and down. The stepping motor 4 can rotate its output shaft 4a intermittently in either forward or reverse direction.
[0014]
A needle swing drive arm 26 (connecting member) is fixed to the output shaft 4 a of the stepping motor 4, and one end of the needle swing link 22 (connecting member) is rotated to the needle swing drive arm 26 via a needle swing link pin 28. Connected as possible. One end of the needle bar support base shaft 24 is connected to the other end of the needle swing link 22 by a needle swing link pin 32 via a needle bar support base shaft holder 30, and the other end is fixed to the needle bar support base 20. ing. The needle bar support base shaft 24 is supported by first and second needle bar support base bearings 36 and 38 attached to the lower part of the arm portion of the sewing machine frame 34 so as to be slidable in the axial direction. Yes.
[0015]
When the output shaft 4 a of the stepping motor 4 rotates, the needle bar support base shaft 24 reciprocates via the needle swing driving arm 26 and the needle swing link 22. Zigzag sewing is performed by a combination of the reciprocating motion of the needle bar 14 in the left-right direction (in the direction of the arrow in FIG. 1) due to the reciprocating motion of the needle bar support base shaft 24 and the cloth feed orthogonal thereto.
[0016]
Of the first and second needle bar support base bearings 36 and 38, the first needle bar support base bearing 36 disposed forward is a bearing metal and is fixed to the sewing machine frame 34. The second needle bar support base bearing 38 is composed of two bearing metals 40 and 44 and one collar (pressing member) 42 disposed between the two bearing metals. The two bearing metals 40 and 44 have the same shape, and the outer diameter 44a is slightly larger than the inner diameter of the through hole 34a formed in the sewing machine frame 34, as shown in FIG. Accordingly, the bearing metals 40 and 44 are press-fitted into the through holes 34 a and fixed to the sewing machine frame 34.
[0017]
On the other hand, the outer diameter 42a of the central pressing member 42 is slightly smaller than the inner diameter of the through hole 34a. Further, the pressing member 42 and the two bearing metals 40 and 44 are arranged so that a slight gap is formed in the axial direction. Accordingly, the pressing member 42 is given play in the radial direction with respect to the through hole 34a, and is also given play in the axial direction with respect to the bearing metals 40 and 44 on both sides.
[0018]
As shown in FIG. 3, screw holes 46 are formed in the sewing machine frame 34 at positions corresponding to the pressing members 42. A spring 48 is inserted into the screw hole 46 to apply a biasing force inward in the radial direction to the pressing member 42. Due to this urging force, the pressing member 42 is pressed against the needle bar support base shaft 24, so that a sliding resistance is generated between the needle bar support base shaft 24 and the pressing member 42. Since the spring 48 is used, the above-mentioned sliding resistance maintains a substantially constant value over a long period of time. The magnitude of this sliding resistance can be adjusted by screws 50 and 52. The two screws 50 and 52 are used to prevent loosening, but only one screw may be used.
[0019]
Both the pressing member 42 and the two bearing metals 40 and 44 are formed with grooves 40b, 42b and 44b in the inner diameter portion. The pressing member 42 has a small hole 42c communicating with the groove 42b from the outer diameter portion. By injecting lubricating oil such as grease from the screw hole 46 of the sewing machine frame 34, the sliding surface of the pressing member 42 and the needle bar support base shaft 24 and the bearing metals 40 and 44 and the needle bar support base shaft through the small hole 42c. Oil can be supplied to the sliding surface with 24. In the second needle bar support base bearing 38, a biasing force is applied to the pressing member 42 by the coil spring 48 in addition to sliding as a normal bearing.
[0020]
In the present embodiment, as described above, the outer diameter 42 a of the pressing member 42 is reduced to form a gap in the radial direction between the inner diameter of the through hole 34 a of the sewing machine frame 34 and the two bearing metals 40. , 44 and the pressing member 42 are formed with a gap in the axial direction, so that the lubricating oil can be held in these gaps. Further, the end surface 42d of the pressing member 42 is formed with irregularities as shown in FIG. This unevenness makes it easier to hold the lubricating oil. Thus, in the present embodiment, the holding force of the lubricating oil in the second needle bar support base bearing 38 is increased. Therefore, seizure and wear associated with applying a sliding force to the needle bar support base shaft 24 using the pressing member 42 can be prevented and the number of times of oil supply can be reduced.
[0021]
The pressing member 42 and the needle bar support base shaft 24 are made of a metal, a ceramic material, or a material whose sliding surface is coated with a ceramic thin film. For example, the pressing member 42 is made of a metal material, and the needle bar support base shaft 24 is made of a metal material, but only the sliding surface thereof is coated with a ceramic thin film.
[0022]
If the play in the axial direction of the central pressing member 42, that is, the gap between the bearing metals 40 and 44 on both sides is set to 0.01 to 0.5 mm in particular, the overrun due to the stepping motor 4 stepping out can be effectively performed. Can be prevented. Further, it is possible to prevent a collision sound between the pressing member 42 and the bearing metals 40 and 44.
[0023]
Although the present invention has been described based on the embodiment shown in the drawings, the present invention is not limited to this embodiment and can be variously modified. For example, an example of a cylindrical collar surrounding the needle bar support base shaft 24 has been shown as the structure of the pressing member 42, but a pressing member that is cut in half in the axial direction to form a semi-cylindrical member is used. be able to. In addition to the cylindrical or semi-cylindrical shape as described above, various structures can be employed as the pressing force applying means for applying the pressing force in the radial direction to the needle bar support base shaft 24. However, when the needle bar support base shaft 24 is surrounded by the cylindrical or semi-cylindrical pressing member 42, the contact with the needle bar support base shaft 24 is an ideal surface contact when pressed by the spring 48. Get closer. By widening the contact area in this way, it is preferable because uneven wear can be prevented and play associated with uneven wear can be eliminated.
Further, in the present invention, since the material of the pressing member has a bearing function, linseed copper is used. However, if the material of the pressing member is a spring material instead of this, the spring 48 of the present embodiment may be omitted. Easy to think. It is also conceivable to apply sliding friction to the needle bar support base shaft by using an oil seal as the pressing member.
[0024]
Moreover, although the 2nd needle bar support stand bearing 38 of the back side of a sewing machine showed the example provided with the press member 42 among 1st and 2nd needle bar support stand bearings 38, 38, the 1st of the front side was shown. The needle bar support pedestal bearing 36 may include a pressing member 42, and the second needle bar support pedestal bearing 38 may be a single bearing metal bearing.
[0025]
Furthermore, although the example using the coil spring 48 as an elastic body that urges the pressing member 42 radially inward has been shown, a plate spring or the like can also be used. Although an example in which the pressing member 42 is urged in the horizontal direction from the front side has been shown, it can be urged in the horizontal direction from the back side from the upper side to the lower side or from the lower side to the upper side.
[0026]
【The invention's effect】
According to the present invention, since the pressing force applying means for applying a pressing force in the radial direction to the needle bar support base shaft is provided, it becomes a sliding resistance against the horizontal movement of the needle bar support base shaft, and at the required needle swing position. It becomes easy to stop. Therefore, the overrun of the needle swinging device due to the stepping motor stepping out can be prevented.
[0027]
When the pressing force applying means is configured to include a cylindrical or semi-cylindrical pressing member that surrounds the needle bar support base shaft, the contact area with the needle bar support base shaft is widened. It becomes difficult to occur.
[0028]
If the pressing force applying means includes an elastic body that urges the pressing member in the radial direction, the pressing force applying means can hold a substantially constant pressing force over a long period of time.
[0029]
If the screw that contacts the elastic body is provided and the pressing force can be adjusted by the screw, the pressing force can be easily adjusted according to the sewing result.
[0030]
The pressing force applying means is configured to include two bearing metals fixed to the sewing machine frame and supporting the needle bar support base shaft so as to be movable in the axial direction, and a pressing member disposed between the two bearing metals. When a gap is formed in the radial direction between the pressing member and the sewing machine frame, the pressing member can move, the needle bar support base shaft can be pressed, and lubricating oil can be held in the gap. Become.
[0031]
When a gap is formed between the two bearing metals, the pressing member can move independently of the bearing metal and can press the needle bar support base shaft. Further, the lubricating oil can be held in this gap.
[0032]
When the pressing member is configured to have an oil supply hole that leads from the outer diameter portion to the inner diameter portion, it is possible to supply oil from the outer diameter portion side to the inner diameter portion side (sliding portion with the needle bar support base shaft). It is effective from the viewpoint of image sticking and wear prevention.
[0033]
Then, a hole through which the elastic body and screw are inserted is formed in the sewing machine frame, and the lubricating oil can be injected into the sliding surface between the pressing member and the needle bar support base shaft through this hole and the oil supply hole, thereby simplifying the operation. This is effective from the viewpoint of preventing seizure and wear.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an entire needle swing device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a support structure of a needle bar support base shaft according to the present embodiment.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a cross-sectional view of a needle bar support base bearing and a pressing member according to the present embodiment.
FIG. 5 is a perspective view showing a pressing member of the present embodiment.
FIG. 6 is a perspective view of a conventional needle swing device.
[Explanation of symbols]
4 ... Stepping motor 14 ... Needle bar 20 ... Needle bar support base 24 ... Needle bar support base shaft 34 ... Machine frame 40, 44 ... Bearing metal 42 ... Colour (press) Element)
48 springs ... (elastic body) 50, 52 ... screws

Claims (2)

針棒を上下動可能に支持する針棒支持台と、
一端が前記針棒支持台に固定された針棒支持台軸と、
ミシンフレームに固定され、前記針棒支持台軸を軸方向に移動可能に支持する２つの軸受メタルと、
前記針棒支持台を布送り方向と直交する方向に移動制御する針振りモータと、
前記針支持台軸へ摺動抵抗を付与する押圧力付与手段と、を備え、
前記押圧力付与手段が、
前記針棒支持台軸を囲む円筒形状に形成されるとともに、その外径が装着されるミシンフレームの貫通孔より小さく形成され、且つ、その軸方向長さが、前記２つの軸受けメタルとの間に軸方向に所定量の隙間を形成するように規定された押圧部材と、
前記押圧部材に対応する位置に、ミシンフレームに形成されたねじ穴と、
前記ねじ穴に挿入され、前記押圧部材にラジアル方向内側への付勢力を付与する弾性体と、
前記ねじ穴に装着され、一端側が前記弾性部材に当接するねじとを備え、
前記ねじにより前記弾性体の付勢力を調節して、前記針棒支持台軸と前記押圧部材との間の摺動抵抗を調整することを特徴とするミシンの針振り装置。A needle bar support that supports the needle bar so as to be movable up and down;
A needle bar support base shaft having one end fixed to the needle bar support base;
Two bearing metals fixed to a sewing machine frame and supporting the needle bar support base shaft movably in the axial direction;
A needle swing motor that controls movement of the needle bar support in a direction orthogonal to the cloth feeding direction;
Pressing force applying means for applying sliding resistance to the needle support base shaft,
The pressing force applying means is
It is formed in a cylindrical shape surrounding the needle bar support base shaft, and its outer diameter is smaller than the through hole of the sewing machine frame to be mounted, and its axial length is between the two bearing metals. A pressing member defined so as to form a predetermined amount of gap in the axial direction ;
A screw hole formed in the sewing machine frame at a position corresponding to the pressing member;
An elastic body that is inserted into the screw hole and applies an urging force radially inward to the pressing member;
A screw attached to the screw hole and having one end abutting against the elastic member;
A needle swinging device for a sewing machine, wherein a sliding resistance between the needle bar support base shaft and the pressing member is adjusted by adjusting an urging force of the elastic body with the screw. 前記押圧部材はその外径部から内径部へ通じる給油穴を有し、前記ねじ穴と前記給油穴を通じて前記押圧部材と針棒支持台軸との摺動面にグリースを注入可能であることを特徴とする請求項１に記載のミシンの針振り装置。  The pressing member has an oil supply hole that communicates from an outer diameter portion to an inner diameter portion, and grease can be injected into the sliding surface between the pressing member and the needle bar support base shaft through the screw hole and the oil supply hole. The sewing machine needle swinging apparatus according to claim 1, wherein
JP2000136782A 2000-05-10 2000-05-10 Sewing machine needle swing device Expired - Fee Related JP4450947B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000136782A JP4450947B2 (en) 2000-05-10 2000-05-10 Sewing machine needle swing device
KR1020010024507A KR100794398B1 (en) 2000-05-10 2001-05-07 Needle vibrating apparatus of sewing machine
CZ20011621A CZ300358B6 (en) 2000-05-10 2001-05-09 Sewing machine needle swinging device
CNB011158522A CN1321235C (en) 2000-05-10 2001-05-10 Sewing machine needle oscillating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000136782A JP4450947B2 (en) 2000-05-10 2000-05-10 Sewing machine needle swing device

Publications (3)

Publication Number Publication Date
JP2001314673A JP2001314673A (en) 2001-11-13
JP2001314673A5 JP2001314673A5 (en) 2007-06-21
JP4450947B2 true JP4450947B2 (en) 2010-04-14

Family

ID=18644670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000136782A Expired - Fee Related JP4450947B2 (en) 2000-05-10 2000-05-10 Sewing machine needle swing device

Country Status (4)

Country Link
JP (1) JP4450947B2 (en)
KR (1) KR100794398B1 (en)
CN (1) CN1321235C (en)
CZ (1) CZ300358B6 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003326005A (en) * 2002-05-08 2003-11-18 Brother Ind Ltd Needle feeding sewing machine
CN101363170B (en) * 2008-09-12 2012-05-02 浙江宝石机电股份有限公司 Rolling wheel regulator of sewing machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049675B (en) * 1953-04-11
ES176002Y (en) * 1972-01-08 1972-11-16 Maquinas De Coser Alfa, S. A. PERFECTED DEVICE TO PRODUCE THE ALTERNATIVE OR FIXED TRANSVERSAL DISPLACEMENT OF THE NEEDLE IN SEWING MACHINES.
US4326472A (en) * 1978-02-10 1982-04-27 Brother Kogyo Kabushiki Kaisha Needle oscillating mechanism for a sewing machine
US4185572A (en) * 1978-03-23 1980-01-29 The Singer Company Electro-mechanical actuator for use in a sewing machine
US4351254A (en) * 1981-06-08 1982-09-28 The Singer Company Sewing machine needle positioning
US4324191A (en) * 1981-06-08 1982-04-13 The Singer Company Auxiliary sewing machine motor braking
JP2650383B2 (en) * 1988-12-20 1997-09-03 ブラザー工業株式会社 Zigzag sewing machine
JPH05293265A (en) * 1992-04-17 1993-11-09 Juki Corp Needle swing drive changing device for zigzag stitch sewing machine
JP2821852B2 (en) * 1994-02-28 1998-11-05 ジューキ株式会社 Needle bar swing guide device of sewing machine
CN1091184C (en) * 1997-06-13 2002-09-18 高林股份有限公司 Needle-stick linkage transmission mechanism of sewing machine
US5960725A (en) * 1998-01-13 1999-10-05 Tseng; Hsien Chang Rotary needle driving mechanism for a sewing machine
JPH11319349A (en) * 1998-05-19 1999-11-24 Juki Corp Needle swinging sewing machine

Also Published As

Publication number Publication date
CN1322870A (en) 2001-11-21
CN1321235C (en) 2007-06-13
KR20010103647A (en) 2001-11-23
JP2001314673A (en) 2001-11-13
CZ20011621A3 (en) 2003-05-14
CZ300358B6 (en) 2009-04-29
KR100794398B1 (en) 2008-01-16

Similar Documents

Publication Publication Date Title
CN112626730B (en) Sewing machine
JPH0710702Y2 (en) Sewing machine cloth feeder
JP4036353B2 (en) Feed dog height adjustment mechanism
JP2006223708A (en) Sewing machine and eyelet hole sewing machine
JP4450947B2 (en) Sewing machine needle swing device
JP4747742B2 (en) Sewing machine needle bar drive device and sewing machine
JP2850592B2 (en) Needle bar drive of sewing machine
JP3452302B2 (en) Link member swing mechanism
CN112626737B (en) Transmission clutch mechanism and sewing machine
JP3814002B2 (en) Bearing structure for industrial sewing machines
JP2008167897A (en) Cloth presser device for sewing machine
KR20080068502A (en) Driving mechanism for thread catcher of embroidery
JP2850591B2 (en) Needle bar drive of sewing machine
JPH08131678A (en) Walking sewing machine
JP4401530B2 (en) Eyelet hole sewing machine
JP2009142411A (en) Sewing machine
JP3758551B2 (en) Needle feed sewing machine
JP2008245727A (en) Cloth pressing device of sewing machine
JP2003191145A (en) Machine tool provided with damping device
JPH0947596A (en) Sewing machine relative motion device
JP2006141434A (en) Needle swinging device for sewing machine
JP2000300872A (en) Buttonhole sewing machine
JPS6016268B2 (en) Cloth feeding device of cycle sewing machine
JP2797769B2 (en) Needle bar drive of sewing machine
JP2003326070A (en) Grease supply mechanism for sewing machine

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070501

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070501

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080930

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081104

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20081209

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20090717

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091016

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20091016

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20091019

A911 Transfer of reconsideration by examiner before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20091026

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100105

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100127

R150 Certificate of patent or registration of utility model

Ref document number: 4450947

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130205

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130205

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140205

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees