JPS6447375U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention, in which Fig. 1 is an explanatory diagram of the configuration of the feed adjustment device of the invention, Fig. 2 is an external view of the sewing machine, Fig. 3 is an explanatory diagram of the feed mechanism, and Fig. 4 is an illustration of the feed adjustment device. A sectional view of the device, and FIG. 5 is an explanatory diagram of the operation dial mounting part, where 1 is the sewing machine frame, 2 is the drive shaft,
3 is a hand wheel, 8 is a feed adjustment piece, 16 is a feed block, 17 is a feed adjustment plate, 18 is an adjustment piece guide, 20 is an elastic body, 21 is a stepped guide screw, 22
and 23 is Natsu.

Claims (1)

[Scope of utility model registration request] A drive shaft is rotatably supported on the machine frame of the sewing machine and has a handwheel fixed to one end; a feed block is fitted into the other end of the drive shaft through a hole and forms a vertical feed cam portion at one end; a feed adjustment plate forming a shaft portion to be inserted into the hole of the feed block and forming an eccentric pin eccentrically and parallel to the shaft portion on the other side;
an adjustment piece guide having an opening through which the eccentric pin can rotate with respect to the rotation of the feed adjustment plate about the shaft portion, and forming a pair of protruding guide walls; It is inserted into the hole of the guide, and further inserted into the circular arc-shaped elongated hole of the feed adjustment plate, and then inserted into and fixed to the feed block, so that the feed adjustment plate can be rotated between the stepped portion of the shaft portion and the feed block. a pair of stepped guide screws that are supported on the adjusting piece; a feed adjusting piece that forms a parallel portion that fits into the pair of guide walls of the adjusting piece guide and a shaft portion on the other side; and a screw for the stepped guide pin. an elastic body forming a rising part by an elastic part having an opening through which the shaft of the feed adjustment piece can be inserted and moved; and the attachment part of the elastic body is attached to the stepped guide pin. a plurality of nuts that are screwed together; an adjustment dial that is fixed to the feed adjustment body and has a scale plate fixed to the end; an indicator needle that is fixed to the feed block and indicates the scale on the scale plate; and the vertical feed cam. and a feed base having a feed dog fixed to the tip, which performs a composite feed movement by transmitting the vertical feed movement by the shaft part and the horizontal feed movement by the shaft part of the feed adjustment piece through a link means, and the elastic body is attached to the feed base. One of the plurality of nuts screwing the mounting part onto the threaded part of the stepped guide pin firmly fixes the mounting part to the threaded part, and the other nuts are used to press the feed adjustment piece and the adjustment piece guide into contact with each other. A feed adjustment device for a sewing machine, which is fixed at an adjusted position.