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

[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

[Scope of utility model registration request]

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.