JPH0313973U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a partially longitudinal front view showing an embodiment of this devised device, Fig. 2 is a side view of the same, Fig. 3 is a partially longitudinal plan view of the upper cutter mounting section, and Fig. 4 is a section of the throat plate. The plan view, FIG. 5, and FIG. 6 are longitudinal sectional front views showing examples of conventional devices. 31... Sewing machine bed, 32... Throat plate, 25... Adjustment shaft, 36... Lower tool post, 37... Knob limit plate, 38
...notch, 40...knob, 41...peripheral groove, 42...male thread, 43...female thread, 48...push spring, 50...lower knife, 51...positioning plate, 52...index section, 53...notch, 54...scale, 68...upper knife.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a sewing machine that has a lower knife and an upper knife, and the upper knife moves up and down as the sewing machine is operating and trims the side edges of the fabric together with the lower knife, The adjustment shaft with the lower tool rest fixed to the tip is slidably inserted into the horizontal guide hole provided, and the male screw fixed concentrically to the knob attached to the sewing machine bed so that it can rotate freely but cannot move in the axial direction is adjusted as described above. A lower knife adjustment device for a sewing machine, which is equipped with a spring that is screwed into a female thread provided on a shaft and pushes the upper part of the lower tool rest toward the upper knife. (2) A claim in which an index part is provided on the upper part of the lower tool rest, this index part is slidably engaged with a notch in the throat plate on the sewing machine bed, and a scale indicated by the index is provided on the side of the notch. The lower blade adjustment device of the sewing machine described in item (1).