JP2006271475A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
JP2006271475A
JP2006271475A JP2005091301A JP2005091301A JP2006271475A JP 2006271475 A JP2006271475 A JP 2006271475A JP 2005091301 A JP2005091301 A JP 2005091301A JP 2005091301 A JP2005091301 A JP 2005091301A JP 2006271475 A JP2006271475 A JP 2006271475A
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Prior art keywords
sewing machine
thread
thread tension
sewing
tension device
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JP2005091301A
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Japanese (ja)
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Tatsuhito Akiyama
辰仁 秋山
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Juki Corp
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Juki Corp
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Priority to JP2005091301A priority Critical patent/JP2006271475A/en
Priority to DE102006013755A priority patent/DE102006013755A1/en
Priority to KR1020060026995A priority patent/KR20060103861A/en
Priority to CNA2006100716144A priority patent/CN1840760A/en
Publication of JP2006271475A publication Critical patent/JP2006271475A/en
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04—Automatically-controlled tensioning devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B49/00—Take-up devices, e.g. levers, for the needle thread
    • D05B49/04—Take-up devices, e.g. levers, for the needle thread rotary

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine that can securely move a thread out of the way when the sewing is completed without enlarging the apparatus itself. <P>SOLUTION: A second thread tension device 30b that controls reeling out of a sewing thread connected to a sewing needle 103 is provided on one side of a sewing machine arm 13. The second thread tension device 30b is equipped with a tension plate (thread tension equipment) 32 composed of a movable plate 32a and a fixed plate 32b, a thread tension solenoid 33, and a thread take-up spring 34, and is installed outside of the sewing machine arm 13 along the outer surface through an installing member 35 in a way that its longitudinal side is placed parallel to the longitudinal side of the sewing machine arm 13. Thus the second thread tension device 30b can be enlarged without considering interface of other members incorporated inside a sewing machine frame 10 and the thread tension can be enhanced without significantly changing the design of other members of the sewing machine frame 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ミシンに関し、特に、糸の繰り出しを規制する糸調子装置を備えるミシンに関する。   The present invention relates to a sewing machine, and more particularly to a sewing machine including a thread tension device that regulates the feeding of a thread.

一般に、本縫いミシンをはじめとする大部分のミシンには、糸の繰り出しを規制する糸調子装置が設けられている。このうち、縫い糸の繰り出しを規制する糸調子装置は、ミシンフレームのアーム部における作業者側の側面部に配設されている。
この糸調子装置は、例えば、糸の経路の両側に固定皿と可動皿とからなる２枚の糸調子皿を備えるとともに、コイルスプリング等の弾性体を介して上記可動皿を固定皿側に付勢することで糸が挟持され、その摩擦力で糸に適度な張力が付与されるようになっている。
また、周方向に角部或いは凹凸を有する溝部が形成された回転体を備え、該回転体の外周に糸を１周以上巻きつけて回転体の軸トルクを調節することにより、繰り出される糸の張力を調節可能としたミシンの糸調子装置も開発されている。
さらに、近年においては、例えば、ボイスコイルモータや電磁ブレーキ、ソレノイド等のアクチュエータを使用することで糸調子装置を電磁的に制御可能とし、糸張力を調節するための推力を縫製中においても所望のタイミングで変化させることを可能としたミシンが開発されている（例えば、特許文献１参照）。
そして、これらアクチュエータの推力を強化することで、糸に対してより大きな張力を作用させ、様々な素材からなる糸や被縫製物に対して種々の縫製を可能とするミシンの開発が進められている。
特開平６−１７００７４号公報 Generally, most sewing machines including a lockstitch sewing machine are provided with a thread tension device that regulates the feeding of the thread. Among these, the thread tension device that regulates the feeding of the sewing thread is disposed on the side surface portion on the operator side in the arm portion of the sewing machine frame.
This thread tension device includes, for example, two thread tension trays composed of a fixed tray and a movable tray on both sides of the yarn path, and attaches the movable tray to the fixed tray side via an elastic body such as a coil spring. By energizing the yarn, the yarn is clamped, and an appropriate tension is applied to the yarn by the frictional force.
In addition, a rotating body having a groove portion with corners or irregularities formed in the circumferential direction is provided, and the thread of the thread to be fed is adjusted by adjusting the axial torque of the rotating body by winding the thread around the outer periphery of the rotating body one or more times. Sewing thread tension devices that can adjust the tension have also been developed.
Furthermore, in recent years, for example, by using an actuator such as a voice coil motor, an electromagnetic brake, or a solenoid, the thread tension device can be electromagnetically controlled, and a thrust force for adjusting the thread tension can be obtained even during sewing. A sewing machine that can be changed at timing has been developed (for example, see Patent Document 1).
Development of sewing machines has been promoted by strengthening the thrust of these actuators so that a greater tension is applied to the yarn and various sewing can be performed on the yarns and workpieces made of various materials. Yes.
JP-A-6-170074

ここで、十分な糸張力を確保するためにアクチュエータの推力を強化すると、必然的に該アクチュエータは大型なものとなり、特に、その長手方向に長さが増大される。しかしながら、上記特許文献１に示されるミシンの糸調子装置においては、該糸調子装置の長手方向がアーム部の長手方向すなわち上軸の軸線方向に対してほぼ垂直な状態でミシンフレームに埋設されているため、糸張力を上げるべくアクチュエータを大型なものとすると、ミシンフレームのアーム部内に配設されている他の各機構部と干渉するため、アクチュエータを大型化することができず、十分な糸張力が得られないという問題があった。或いは、アクチュエータを大型なものにすると、フレームの外寸を大きくしなければならず、限られた設計範囲のミシンにしか搭載することができないという問題があった。
このため、ミシンフレーム自体を大型化することなく、糸張力を上げることができるミシンの開発が望まれていた。 Here, if the thrust of the actuator is strengthened in order to ensure a sufficient yarn tension, the actuator inevitably becomes large in size, and in particular, its length increases in the longitudinal direction. However, in the thread tension device of the sewing machine disclosed in Patent Document 1, the longitudinal direction of the thread tension device is embedded in the sewing machine frame in a state where the longitudinal direction of the thread tension device is substantially perpendicular to the longitudinal direction of the arm portion, that is, the axial direction of the upper shaft. Therefore, if the actuator is large in order to increase the thread tension, it will interfere with other mechanical parts arranged in the arm part of the sewing machine frame. There was a problem that tension could not be obtained. Alternatively, when the actuator is made large, there is a problem that the outer size of the frame has to be increased and can only be mounted on a sewing machine with a limited design range.
For this reason, it has been desired to develop a sewing machine that can increase the thread tension without increasing the size of the sewing machine frame itself.

本発明は、ミシンフレーム自体を大型化することなく、十分な糸張力を確保することができるミシンを提供することをその目的とする。   An object of the present invention is to provide a sewing machine that can ensure a sufficient yarn tension without increasing the size of the sewing machine frame itself.

前記課題を解決するために、請求項１に記載の発明は、ミシンフレームと、一対の糸調子皿と、該糸調子皿に対して該糸調子皿を支持する支持軸の軸線方向に作用すると共に電磁的に作用して該作用量を制御可能なアクチュエータと、を具備して縫い糸の繰り出しに付与する抵抗力を制御可能な糸調子装置と、を備えるミシンにおいて、前記糸調子装置は、その全体が、前記ミシンフレームにおけるアーム部の外側で外面に沿って配置されていることを特徴とするミシンである。   In order to solve the above problems, the invention according to claim 1 acts in the axial direction of a sewing machine frame, a pair of thread tension plates, and a support shaft that supports the thread tension plates with respect to the thread tension plates. And a thread tension device capable of controlling a resistance force applied to the feeding of the sewing thread, the actuator being capable of controlling the amount of action by electromagnetically acting together with the thread tension device, The sewing machine is characterized in that the whole is arranged along the outer surface outside the arm portion of the sewing machine frame.

請求項１に記載の発明によれば、アクチュエータがミシンフレームの外側に配置されるため、ミシンフレーム内部に配設されている他の部材との干渉を考慮することなく大型の糸調子装置を搭載することができる。したがって、ミシンフレーム等の他の部材の設計を大きく変更することなく強力な糸調子装置を搭載することができ、種々の一般的なミシンにも取り付けることが可能となる。また、糸に作用される張力を従来よりも増大させることができ、様々な素材や縫製パターンに対応可能なミシンを実現することができる。
また、糸調子装置を外面に沿った向きで配置するため、外部に対する突出量をも低減することができ、ミシンの小型化を測ることが可能となる。 According to the first aspect of the present invention, since the actuator is disposed outside the sewing machine frame, the large-sized thread tension device is mounted without considering interference with other members arranged inside the sewing machine frame. can do. Therefore, a powerful thread tension device can be mounted without significantly changing the design of other members such as a sewing machine frame, and can be attached to various general sewing machines. Further, the tension applied to the yarn can be increased as compared with the conventional case, and a sewing machine that can cope with various materials and sewing patterns can be realized.
Further, since the thread tension device is arranged in the direction along the outer surface, the amount of protrusion to the outside can be reduced, and the size of the sewing machine can be measured.

以下、本発明の実施の形態を図１〜図４に基づいて詳しく説明する。
本実施形態においては、ミシンとして本縫いミシンを例に説明する。
ここで、後述する縫い針２２が上下動を行う方向をＺ軸方向（上下方向）とし、これと直交するミシンアーム部の長手方向をＹ軸方向（前後方向）とし、Ｚ軸方向とＹ軸方向の両方に直交する方向をＸ軸方向（左右方向）と定義する。 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
In the present embodiment, a description will be given by taking an example of a sewing machine as a sewing machine.
Here, the direction in which the sewing needle 22 to be described later moves up and down is the Z-axis direction (vertical direction), the longitudinal direction of the sewing machine arm portion orthogonal to this is the Y-axis direction (front-rear direction), and the Z-axis direction and the Y-axis A direction orthogonal to both directions is defined as an X-axis direction (left-right direction).

（実施の形態の全体構成）
図１は本実施形態たるミシン１００の要部構成を示す斜視図である。
図１に示すように、本縫いミシン１００（以下、ミシン１００）は、ミシンフレーム１０と、縫い糸の繰り出しに抵抗力を付与する糸調子装置たる糸調子装置３０と、を備えて主要部が構成されている。なお、ミシン１００は、本実施形態では詳述しないが、ミシン動作の駆動源となるミシンモータ（図示省略）、ミシンモータにより回転自在に設けられた上軸１０１、上軸の回転駆動力を上下動に変換して縫い針１０３を上下に駆動する針駆動機構（図示省略）、針落ち位置近傍において被縫製物の浮き上がりを防止する布押さえ１４、被縫製物たる布を搬送する布送り機構（図示省略）、布送り機構に駆動力を伝達する下軸（図示省略）等を備えており、一般的な縫製動作を可能とする各機能を備えている。 (Overall configuration of the embodiment)
FIG. 1 is a perspective view showing a main configuration of a sewing machine 100 according to the present embodiment.
As shown in FIG. 1, a main-stitch sewing machine 100 (hereinafter referred to as a sewing machine 100) includes a sewing machine frame 10 and a thread tension device 30 that is a thread tension device 30 that applies resistance to the feeding of a sewing thread. Has been. Although not described in detail in the present embodiment, the sewing machine 100 is a sewing motor (not shown) that serves as a driving source for the sewing machine operation, an upper shaft 101 that is rotatably provided by the sewing motor, and the rotational driving force of the upper shaft. A needle drive mechanism (not shown) that converts the movement into a motion to drive the sewing needle 103 up and down, a cloth presser 14 that prevents the sewing product from being lifted in the vicinity of the needle drop position, and a cloth feed mechanism that conveys the cloth that is the sewing product ( (Not shown), a lower shaft (not shown) for transmitting a driving force to the cloth feed mechanism, and the like, and each function enabling a general sewing operation.

（ミシンフレーム）
ミシンフレーム１０は、外形が側面視にて略コ字状を呈している。このミシンフレーム１０は、該ミシンフレーム１０の上部をなし前後方向に延びるミシンアーム部１３と、ミシンフレーム１０の下部をなし前後方向に延びるミシンベッド部１１と、ミシンアーム部１３とミシンベッド部１１とを連結する縦胴部１２とを備えている。また、ミシンフレーム１０内には動力伝達機構が設けられている。 (Sewing frame)
The outer shape of the sewing machine frame 10 is substantially U-shaped when viewed from the side. The sewing machine frame 10 includes a sewing machine arm portion 13 that extends above and below the sewing machine frame 10, a sewing bed portion 11 that extends below the sewing machine frame 10, and the sewing machine arm portion 13 and the sewing bed portion 11. And a vertical body 12 that connects the two. A power transmission mechanism is provided in the sewing machine frame 10.

ミシンアーム部１３の内側には回動自在で前後方向に延びる上軸１０１が延在されている。上軸１０１は、その一端（後端）が図示しないミシンモータに接続されており、ミシンモータから駆動力を付与されることで、その他端（先端）に配設されている針駆動機構を駆動する。針駆動機構は、針棒２１および縫い針２２を備えており、上述した上軸１０１の回転にともない、上下方向の往復動作を付与されて針落ちを行うようになっている。   An upper shaft 101 that is rotatable and extends in the front-rear direction is extended inside the sewing machine arm portion 13. One end (rear end) of the upper shaft 101 is connected to a sewing machine motor (not shown), and when a driving force is applied from the sewing machine motor, the needle driving mechanism disposed at the other end (front end) is driven. To do. The needle drive mechanism includes a needle bar 21 and a sewing needle 22, and is subjected to a needle drop by being given a reciprocating motion in the vertical direction in accordance with the rotation of the upper shaft 101 described above.

（糸調子装置）
ミシンアーム部１３の側面には、縫い針２２に連なる縫い糸の繰り出しを規制する糸調子装置３０が設けられている。糸調子装置３０は、ミシン１００の糸供給源寄りに設けられた第１糸調子装置３０ａと、第１糸調子装置３０ａよりも縫い針１０３寄りに設けられた第２糸調子装置３０ｂとを備えている（図１参照）。 (Thread tension device)
On the side surface of the sewing machine arm portion 13, a thread tension device 30 that restricts the feeding of the sewing thread continuous with the sewing needle 22 is provided. The thread tension device 30 includes a first thread tension device 30a provided closer to the thread supply source of the sewing machine 100 and a second thread tension device 30b provided closer to the sewing needle 103 than the first thread tension device 30a. (See FIG. 1).

第１糸調子装置３０ａは、ミシンアーム部１３の先端部の上方に設けられており、糸Ｔに対して常に張力を付与するとともに、図示しない糸切り装置による糸Ｔの切断時に縫い糸の供給源から糸が過剰に繰り出されることを防止する機能を備えている。
第２糸調子装置３０ｂは、第１糸調子装置３０ａの下方に設けられており、縫製時に糸Ｔに適度な張力を付与して縫い目が弛むことを防止する機能を備えている。ここで、第２の糸調子装置３０ｂにより糸Ｔに付与される張力は、第１の糸調子装置３０ａにより糸Ｔに付与される張力よりも大きくなっている。
第２糸調子装置３０ｂは、支持軸３７に貫通され支持された可動皿３２ａと固定皿３２ｂとからなる調子皿（糸調子器）３２、糸調子ソレノイド３３、糸取りバネ３４を備えており、取り付け部材３５を介してミシンアーム部１３の外側で外面に沿って、その長手方向がミシンアーム部１３の長手方向と平行となるように取り付けられている。
糸調子ソレノイド３３は、略円筒状の外枠の内部にコイル３６備えており、また、内部の中心に駆動軸３１を備えている。本実施形態たるミシン１００において、糸調子ソレノイド３３は、駆動軸３１と支持軸３７とを同軸上として糸調子皿３２に対してミシンアーム部１３の後方側となるように配設されている。
なお、駆動軸３１と支持軸３７は、糸調子ソレノイド３３の作用力が糸調子皿３２に支持軸３７の軸線方向に作用すればよく、同軸上に配置されていなくてもよく、また、平行でなくてもよい。 The first thread tension device 30a is provided above the tip of the sewing machine arm portion 13, and always applies tension to the thread T, and supplies a sewing thread when the thread T is cut by a thread trimming device (not shown). It has a function to prevent the yarn from being fed out excessively.
The second thread tension device 30b is provided below the first thread tension device 30a, and has a function of preventing the seam from loosening by applying an appropriate tension to the thread T during sewing. Here, the tension applied to the thread T by the second thread tension device 30b is larger than the tension applied to the thread T by the first thread tension device 30a.
The second thread tension device 30b includes a tension tray (thread tensioner) 32, a thread tension solenoid 33, and a thread take-up spring 34. Along the outer surface of the sewing machine arm portion 13 along the outer surface via the member 35, the longitudinal direction of the sewing machine arm portion 13 is attached in parallel with the longitudinal direction of the sewing machine arm portion 13.
The thread tension solenoid 33 includes a coil 36 inside a substantially cylindrical outer frame, and a drive shaft 31 at the center of the inside. In the sewing machine 100 according to the present embodiment, the thread tension solenoid 33 is disposed on the rear side of the sewing machine arm portion 13 with respect to the thread tension tray 32 with the drive shaft 31 and the support shaft 37 being coaxial.
The drive shaft 31 and the support shaft 37 need not be arranged on the same axis as long as the acting force of the thread tension solenoid 33 acts on the thread tension plate 32 in the axial direction of the support shaft 37, and is parallel. It does not have to be.

支持軸３７には可動皿３２ａが設けられている。本実施形態では、糸の供給源から第１糸調子装置を経由して繰り出された糸が、当該糸調子ソレノイド３３に対してミシンアーム部１３と反対側（右側）となる方向から供給されるようになっている。すなわち、第２糸調子装置３０ｂは、第１糸調子装置３０ａを経て供給される糸が、当該糸の供給経路の途中に配設された可動皿３２ａ、３２ｂの間隙に対して作業者側（右側）から案内されるとともに、これら可動皿３２ａ、固定皿３２ｂの間の下方側部分を通過してミシンアーム部１３側に案内されるようになっている。
また、糸調子ソレノイド３３は、図示しない制御部に接続されている。これにより、第２糸調子装置３０ｂは、縫い糸に付与する抵抗力が制御部によって電磁的に制御可能なアクチュエータとして機能するものである。また、第２糸調子装置３０ｂは、糸調子ソレノイド３３の推力により駆動軸３１を駆動し、一対の糸調子皿３２ａ，３２ｂに対して支持軸３７の軸線方向の推力を作用させて可動皿３２ａと固定皿３２ｂ間の縫い糸を挟む力を連続的に変化させて糸張力を変更する、動的な糸調子（アクティブテンション）となっている。 A movable dish 32 a is provided on the support shaft 37. In the present embodiment, the yarn fed from the yarn supply source via the first thread tension device is supplied to the thread tension solenoid 33 from the direction opposite to the sewing machine arm 13 (right side). It is like that. That is, the second thread tension device 30b is configured such that the yarn supplied via the first thread tension device 30a is closer to the operator side with respect to the gap between the movable plates 32a and 32b disposed in the middle of the thread supply path ( In addition to being guided from the right side), it passes through the lower part between the movable plate 32a and the fixed plate 32b and is guided to the sewing machine arm 13 side.
The thread tension solenoid 33 is connected to a control unit (not shown). Thereby, the 2nd thread tension device 30b functions as an actuator which can control resistance force given to a sewing thread electromagnetically by a control part. Further, the second thread tension device 30b drives the drive shaft 31 by the thrust of the thread tension solenoid 33 and causes the thrust in the axial direction of the support shaft 37 to act on the pair of thread tension trays 32a and 32b. And dynamic tension (active tension) in which the thread tension between the fixing plate 32b is continuously changed to change the thread tension.

また、第２糸調子装置３０ｂには、糸Ｔに比較的小さな張力を付与して糸Ｔの張力を微調整する糸取りばね３４が設けられている。この糸取りバネ３４は、前述した第２糸調子装置３０ｂの可動皿３２ａ、３２ｂと、ミシンアーム部１３との間に配設されている。糸取りばね３４には、第２糸調子装置３０ｂによって張力を付与された縫い針２２側の糸Ｔが通されており、糸Ｔに作用する張力が大きくなると、糸取りばね３４は、縫い針２２側に向けて撓むようになっている。すなわち、例えば、図示しないワイパー装置による被縫製物からの糸抜き作業により、糸Ｔに作用する張力が増加すると糸取りばね３４は撓み、糸Ｔが切断されると糸取りばね３４はその復元力により動作前の初期位置に戻るようになっている。   The second thread tension device 30b is provided with a thread take-up spring 34 that applies a relatively small tension to the thread T and finely adjusts the tension of the thread T. The thread take-up spring 34 is disposed between the movable plates 32 a and 32 b of the second thread tension device 30 b described above and the sewing machine arm portion 13. The thread take-up spring 34 is passed through the thread T on the side of the sewing needle 22 to which the tension is applied by the second thread tension device 30b. It is designed to bend toward. That is, for example, the thread take-up spring 34 bends when the tension acting on the thread T increases due to the thread removing operation from the sewing product by a wiper device (not shown), and the thread take-up spring 34 operates by its restoring force when the thread T is cut. It returns to the previous initial position.

次に、本実施形態に係るミシン１００の作用について、図面を参照して詳しく説明する。
本実施形態たるミシン１００では、アクチュエータを備えた第２糸調子装置３０ｂはミシンアーム部１３の外側においてその側面に沿って設けられているため、ミシンフレーム１０（特に、ミシンアーム部１３）に内蔵されている他の機構部と干渉を生じることがない。すなわち、糸調子装置３０のアクチュエータがミシンフレーム１０に内蔵されていた従来のミシンに比べて、糸調子装置３０を大型化することによる他の機構部との干渉が低減される。
また、第２糸調子装置３０ｂは、その長手方向がミシンアーム部１３の長手方向に沿って配設されているため、ミシンフレーム１０の外側に搭載されている他の部材との間においても干渉を生じる恐れが抑制され、また、作業者の操作の妨げとなることもない。
したがって、所望により、糸調子装置３０の大きさが選択可能となり、大型のアクチュエータを備えた糸調子装置３０を搭載することも可能となるものである。 Next, the operation of the sewing machine 100 according to the present embodiment will be described in detail with reference to the drawings.
In the sewing machine 100 according to the present embodiment, the second thread tension device 30b provided with the actuator is provided along the side surface outside the sewing machine arm portion 13, and is therefore incorporated in the sewing machine frame 10 (particularly, the sewing machine arm portion 13). It does not cause interference with other mechanisms. That is, as compared with the conventional sewing machine in which the actuator of the thread tension device 30 is built in the sewing machine frame 10, interference with other mechanism parts due to the enlargement of the thread tension device 30 is reduced.
Further, since the second thread tension device 30b is disposed along the longitudinal direction of the sewing machine arm portion 13, the second thread tension device 30b also interferes with other members mounted on the outside of the sewing machine frame 10. , And the operator's operation is not hindered.
Accordingly, the size of the thread tension device 30 can be selected as desired, and the thread tension device 30 having a large actuator can be mounted.

以上のように、本実施形態たるミシン１００によれば、ミシンフレーム１０の内部に配設されている他の部材との干渉を考慮することなく該糸調子装置３０を大型化することができる。したがって、ミシンフレーム１０等の他の部材の設計を大きく変更することなく大型の糸調子装置３０を搭載することが可能となる。したがって、糸に作用される張力を従来よりも強化することがで、様々な素材や縫製パターンに対応可能なミシンを実現することができる。また、ミシンフレーム１０に対して外付けにより搭載可能であるため、種々の一般的なミシンにも取り付けることが可能となる。
また、糸調子装置３０は、その長手方向がミシンフレーム１０の長手方向と平行な向きに備えられているため、ミシンフレーム１０の外部においてもミシン１００の動作や作業者の操作を大きく妨げることがなく、円滑な縫製動作を確保しつつ糸張力を強化することができる。 As described above, according to the sewing machine 100 according to the present embodiment, the thread tension device 30 can be enlarged without considering interference with other members disposed inside the sewing machine frame 10. Therefore, the large thread tension device 30 can be mounted without greatly changing the design of other members such as the sewing machine frame 10. Therefore, it is possible to realize a sewing machine that can cope with various materials and sewing patterns by strengthening the tension applied to the yarn more than before. Further, since it can be mounted externally on the sewing machine frame 10, it can be attached to various general sewing machines.
Further, since the longitudinal direction of the thread tension device 30 is provided in a direction parallel to the longitudinal direction of the sewing machine frame 10, the operation of the sewing machine 100 and the operation of the operator are greatly hindered even outside the sewing machine frame 10. Therefore, the thread tension can be strengthened while ensuring a smooth sewing operation.

なお、本実施形態における糸調子装置３０は、ソレノイド３３の推力を電磁的に制御調節することで縫い糸の張力を調節可能とする、いわゆるアクティブテンションを採用する構成としたが、これに限定されるものではなく、例えば、周方向に角部或いは凹凸を有する溝部が形成された回転体を備えるとともに、該回転体の外周に糸を１周以上巻きつけて回転体の軸トルクを調節することで、繰り出される糸の張力を調節可能とするいわゆるロータリーテンションを採用する構成としてもよい。
また、糸調子装置３０は、ミシンフレーム１０の外部において、該ミシンフレーム１０の外面に沿ってミシン１００の縫製動作やオペレータの操作の妨げとならぬ向きに設けられていればよく、図４に示すように、ミシンアーム部１３の作業者側の側面に沿ってその長手方向が縫い針２２の上下動方向と平行となるように取り付けられる構成としてもよい。この場合、ソレノイド３３の本体が上側となるように配設されることが好ましい。このようにすれば、糸の張力を緩めた際に当該糸に対して重力による可動皿３２ａの重さが作用されることがなく、糸張力を制御する上で良好な応答性（追従性）を確保することができる。
また、糸調子装置３０は、本実施形態においては本縫いミシン１００に搭載された例について説明したが、本実施形態による取り付け構造により、例えば、他の種々の工業用ミシンや家庭用の一般的なミシンにも搭載することが可能であり、種々のミシンに対して糸調子装置を取り付ける際に適用することができる。
また、本実施形態における糸調子装置３０は、ミシンフレーム１０に対して外付けとなるためその取り付け位置の適用領域は広く、他の装置や部材と干渉せず、糸張力を良好に作用させることができる位置であればいずれの場所にも取り付けが可能であるが、汎用されている一般的なミシンに広く搭載可能とするために、従前の糸経路において、従前の糸調子装置３０が取り付けられていた位置或いはその近傍に取り付けることが好ましい。このようにすれば、繰り出される糸に無理な張力が作用されることがなく、縫製動作を良好に行うことができる。
なお、糸調子装置３０のアクチュエータは、直動式で作用量が制御可能であればよく、例えば、ボイスコイルモータであってもよい。 The thread tension device 30 in the present embodiment employs a so-called active tension that allows the tension of the sewing thread to be adjusted by electromagnetically controlling and adjusting the thrust of the solenoid 33, but is not limited thereto. For example, it is provided with a rotating body in which grooves having corners or irregularities are formed in the circumferential direction, and by adjusting the axial torque of the rotating body by winding a thread around the outer periphery of the rotating body one or more times. Alternatively, a so-called rotary tension that makes it possible to adjust the tension of the fed yarn may be adopted.
Further, the thread tension device 30 may be provided outside the sewing machine frame 10 along the outer surface of the sewing machine frame 10 in a direction that does not hinder the sewing operation of the sewing machine 100 or the operation of the operator. As shown, it is good also as a structure attached so that the longitudinal direction may become parallel to the up-and-down moving direction of the sewing needle 22 along the operator side surface of the sewing machine arm part 13. In this case, it is preferable to arrange the solenoid 33 so that the main body is on the upper side. In this way, when the yarn tension is loosened, the weight of the movable tray 32a due to gravity is not applied to the yarn, and the response (trackability) is good in controlling the yarn tension. Can be secured.
Further, in the present embodiment, the thread tension device 30 has been described as being mounted on the lockstitch sewing machine 100. However, the thread tension device 30 may be installed in various other industrial sewing machines or household general machines by the mounting structure according to the present embodiment. It can be mounted on various sewing machines, and can be applied when attaching the thread tension device to various sewing machines.
In addition, since the thread tension device 30 in the present embodiment is externally attached to the sewing machine frame 10, the application area of the attachment position is wide, and the thread tension is favorably applied without interfering with other devices and members. Can be attached to any place as long as it can be installed, but in order to be able to be widely installed in a general sewing machine that is widely used, the conventional thread tension device 30 is attached in the conventional thread path. It is preferable to attach at or near the position. In this way, excessive tension is not applied to the fed yarn, and the sewing operation can be performed satisfactorily.
The actuator of the thread tension device 30 may be a direct acting type that can control the amount of action, and may be, for example, a voice coil motor.

本発明に係るミシン１００の要部構成を示す斜視図である。It is a perspective view which shows the principal part structure of the sewing machine 100 which concerns on this invention. 本実施形態におけるミシン１００の要部構成を示す側面図である。1 is a side view showing a configuration of a main part of a sewing machine 100 in the present embodiment. 本実施形態におけるミシン１００の要部構成を示す正面図である。1 is a front view illustrating a configuration of a main part of a sewing machine 100 according to an embodiment. 本実施形態におけるミシン１００の取り付け方向の一例を示す側面図である。It is a side view which shows an example of the attachment direction of the sewing machine 100 in this embodiment.

符号の説明Explanation of symbols

１０ ミシンフレーム
１１ ミシンベッド部
１２ 縦胴部
１３ ミシンアーム部
１４ 布押さえ
２１ 針棒
２２ 縫い針
３０ 糸調子装置
３０ａ 第１糸調子装置
３０ｂ 第２糸調子装置（アクティブテンション）
３１ 駆動軸
３２ 調子皿
３２ａ 可動皿
３２ｂ 固定皿
３３ 糸調子ソレノイド
３４ 糸取りバネ
３７ 支持軸
１００ ミシン
１０１ 上軸
Ｔ 糸 DESCRIPTION OF SYMBOLS 10 Sewing machine frame 11 Sewing machine bed part 12 Vertical body part 13 Sewing machine arm part 14 Cloth presser 21 Needle bar 22 Sewing needle 30 Thread tension device 30a 1st thread tension device 30b 2nd thread tension device (active tension)
31 Drive shaft 32 Tension tray 32a Movable tray 32b Fixed tray 33 Thread tension solenoid 34 Thread take-up spring 37 Support shaft 100 Sewing machine 101 Upper shaft T Thread

Claims (1)

ミシンフレームと、
一対の糸調子皿と、該糸調子皿に対して該糸調子皿を支持する支持軸の軸線方向に作用すると共に電磁的に作用して該作用量を制御可能なアクチュエータと、を具備して縫い糸の繰り出しに付与する抵抗力を制御可能な糸調子装置と、を備えるミシンにおいて、
前記糸調子装置は、その全体が、前記ミシンフレームにおけるアーム部の外側で外面に沿って配置されていることを特徴とするミシン。 A sewing machine frame,
A pair of thread tension plates, and an actuator that operates in the axial direction of a support shaft that supports the thread tension plate with respect to the thread tension plates and that can act electromagnetically and control the amount of action. In a sewing machine comprising: a thread tension device capable of controlling a resistance force applied to the feeding of a sewing thread,
The thread tension device as a whole is arranged along the outer surface outside the arm portion of the sewing machine frame.
JP2005091301A 2005-03-28 2005-03-28 Sewing machine Pending JP2006271475A (en)

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JP2005091301A JP2006271475A (en) 2005-03-28 2005-03-28 Sewing machine
DE102006013755A DE102006013755A1 (en) 2005-03-28 2006-03-24 Sewing machine comprises sewing machine rack with arm part and arm shaft, thread tension regulator having movable and fixed disks, retaining shank to hold and penetrate the disks and actuator with drive shank coupled to the retaining shank
KR1020060026995A KR20060103861A (en) 2005-03-28 2006-03-24 A sewing machine
CNA2006100716144A CN1840760A (en) 2005-03-28 2006-03-28 Sewing machine

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CN111172678A (en) * 2018-11-09 2020-05-19 Juki株式会社 Staggered sewing machine

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JP2007202833A (en) 2006-02-02 2007-08-16 Juki Corp Thread tension device of sewing machine
KR100940146B1 (en) * 2006-12-15 2010-02-03 브라더 고오교오 가부시키가이샤 Sewing machine
CN101624759B (en) * 2009-08-21 2012-09-26 张章生 Computer sewing machine capable of controlling thread end length
CN101942745B (en) * 2010-07-27 2013-04-24 际华三五三四制衣有限公司 Basting machine converted from flat bed sewing machine
JP6475507B2 (en) * 2015-02-18 2019-02-27 蛇の目ミシン工業株式会社 sewing machine

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JPH02224786A (en) * 1988-12-23 1990-09-06 Kochs Adler Ag Material-tensioning device for sewing-machine

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Publication number Priority date Publication date Assignee Title
JPH02224786A (en) * 1988-12-23 1990-09-06 Kochs Adler Ag Material-tensioning device for sewing-machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172678A (en) * 2018-11-09 2020-05-19 Juki株式会社 Staggered sewing machine
CN111172678B (en) * 2018-11-09 2024-03-01 Juki株式会社 Staggered sewing machine

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