JP2010011909A5 - - Google Patents

Claims (4)

A sewing machine spindle that moves the sewing needle up and down;
A shuttle shaft to which the rotational driving force of the sewing machine main shaft is transmitted;
The downstream portion of the protrusion in the outer hook rotation direction is periodically engaged with the inner hook whose rotation with rotation of the outer hook fixedly connected to the hook shaft is restricted in synchronization with the vertical movement of the sewing needle. And an opener that pulls in a direction to separate the mating part ,
In the opener mechanism of the sewing machine comprising the transmission mechanism that imparts the periodic pulling action to the opener,
The transmission mechanism includes an eccentric cam fixed to the hook shaft, and an inner hook guide arm that holds the eccentric cam at one end and holds an opener at the other end.
An opener fixing means for attaching the opener to the inner hook guide arm so as to be adjustable in rotation and to be adjustable in movement in the radial direction of rotation,
An angle adjusting screw that is an angle adjusting body that determines the rotation angle of the opener by pressing the tip of the opener on a side surface of the opener and deviating from the rotation center ;
A position adjusting screw that is oriented in the longitudinal direction of the opener, and that is a position adjusting body that determines a position along the rotational radial direction by pressing the tip of the opener against the side surface of the swinging end of the inner hook guide arm. Sewing machine opener mechanism. The opener is supported so as to be able to rotate and adjust with a set screw as the fixing means as a support shaft, and is supported so as to be movable and adjustable in the turning radial direction by an elongated hole part into which the set screw can be inserted. The sewing machine opener mechanism according to claim 1, wherein The opener, the cause rotational adjustment or position displaced along a radial direction of said the opener distal end by one of the mobile adjusting said in the kettle, the opener distal end by the other of the rotational adjustment or movement regulation The sewing machine opener mechanism according to claim 1 or 2, wherein the transmission mechanism is supported by the transmission mechanism so as to cause a displacement in a direction perpendicular to a radial direction of the inner hook. Wherein the angle adjustment screw and the position adjusting screw, sewing opener mechanism according to claim 1, characterized in that the pronged shape.