JPH0263785U

JPH0263785U -

Info

Publication number: JPH0263785U
Application number: JP14340588U
Authority: JP
Priority date: 1988-11-04
Filing date: 1988-11-04
Publication date: 1990-05-14

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例にして第１図は本考案を
装着したミシンの外観図、第２図は本考案要部の
分解斜視図、第３図及び第４図本考案の要部を断
面した状態図であり、１はミシン機枠、２は本縫
縫目形成機構、３は縁かがり縫目形成機構、４は
駆動軸、６は本縫調車、１２は本縫ばね、１４は
本縫駆動部材、２１はオーバロツク調車、２８は
オーバロツク駆動部材、３３はオーバロツクばね
、３４は切換操作片である。 The drawings are examples of the present invention. Figure 1 is an external view of a sewing machine equipped with the present invention, Figure 2 is an exploded perspective view of the main parts of the invention, and Figures 3 and 4 are cross-sections of the main parts of the invention. 1 is a sewing machine frame, 2 is a lockstitch stitch forming mechanism, 3 is an overedge stitch forming mechanism, 4 is a drive shaft, 6 is a lockstitch pulley, 12 is a lockstitch spring, and 14 is a The lockstitch driving member includes an overlock pulley 21, an overlock driving member 28, an overlock spring 33, and a switching operation piece 34.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

ミシン機枠の一方端に本縫縫目形成機構を設け
、ミシン機枠の他方端に縁かがり縫目形成機構を
設け、ミシン機枠の外部に設けた切換操作部の操
作により前記両縫目形成機構のうちいずれかの縫
目形成機構のみを電動機により駆動可能に切換え
る切換機構とを設けた複合ミシンにおいて、前記
ミシン機枠に回転自在に支持された上軸と同心に
支持され前記電動機によりベルトを介して回転せ
しめられる駆動軸４と、該駆動軸上にて軸方向へ
の摺動を阻止され且つ回転自在に嵌装されたオー
バロツク調車２１と、該オーバロツク調車に形成
された中空軸の外周に回転が阻止され且つ軸方向
の摺動が可能に嵌装されたオーバロツク縫駆動部
材２８と、該オーバロツク縫駆動部材と前記オー
バロツク調車との間に介装されたオーバロツクば
ね３３と、前記上軸に固着された本縫調車６と、
該本縫調車の穴内に形成された突起に外周に形成
の溝を嵌合せしめて軸方向の摺動が可能なる本縫
駆動部材１４と、該本縫駆動部材と前記本縫調車
との間に介装された本縫ばねと、前記本縫駆動部
材と前記オーバロツク縫駆動部材との間に狭装さ
れ、前記切換操作部の操作に作動せしめられる切
換操作片とを設けたことを特徴とする複合ミシン
の切換装置。 A lock stitch forming mechanism is provided at one end of the sewing machine frame, an overlock stitch forming mechanism is provided at the other end of the sewing machine frame, and both the above-mentioned stitches are formed by operating a switching operation section provided outside the sewing machine frame. In a compound sewing machine provided with a switching mechanism for switching only one of the stitch forming mechanisms to be drivable by an electric motor, the sewing machine is supported concentrically with an upper shaft rotatably supported on the sewing machine frame and driven by the electric motor. A drive shaft 4 rotated via a belt, an overlock pulley 21 fitted on the drive shaft so as to be rotatable and prevented from sliding in the axial direction, and a hollow formed in the overlock pulley. an overlock stitch drive member 28 fitted on the outer periphery of the shaft so as to be prevented from rotating and slidable in the axial direction; an overlock spring 33 interposed between the overlock stitch drive member and the overlock pulley; , a lockstitch pulley 6 fixed to the upper shaft;
A lockstitch drive member 14 capable of sliding in the axial direction by fitting a groove formed on the outer periphery into a projection formed in a hole of the lockstitch pulley, and a lockstitch drive member 14 and the lockstitch pulley. A lockstitch spring interposed therebetween, and a switching operation piece interposed between the lockstitch driving member and the overlock stitching driving member and actuated by operation of the switching operation section. Switching device for compound sewing machines.