JPS6247373U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a cloth presser foot of a cloth edge tracing sewing machine which is an embodiment of the present invention. FIG. 2 is a plan view showing the work cloth and cloth presser foot set in the same sewing machine. FIG. 3 is a front view of the head of the sewing machine with its cover removed. Fourth
The figure is an explanatory diagram showing the relative positional relationship between the fabric detector and the reflective surface in the same sewing machine, and the range in which linearity can be obtained in the fabric detector. FIG. 5 is a block diagram showing the control circuit of the sewing machine. FIG. 6 is an explanatory diagram showing needle position control in the same sewing machine. FIG. 7 is a plan view showing a first work cloth and a second work cloth to be sewn together by the same sewing machine. Figures 8 and 9 are graphs showing the results of a comparative test between using the same light-emitting element and light-receiving element as a reflective type photo sensor to detect the cloth edge position and using it as a transmission type photo sensor. be. 2: Bed, 14: Sewing needle, 48: Cloth presser foot,
62: Notch portion, 66: Extension portion, 68: Cloth detector,
70: Light emitting element (light emitting part), 72: Light receiving element (light receiving part), 76: Reflective surface, 79: Feed dog (feeding device), 82: Stitch data generation device, 86: Needle swing calculation device, 89: Feed amount adjustment device, 90: Needle swing adjustment device, 94: Multiplexer (control device), 9
6: Needle swing control circuit (control device), 100: Needle swing control motor, 110: Copy sewing control device, 112
: Adder (conversion means), 114: A/D converter (
conversion means), 116: adder (conversion means), 11
8: Seam allowance data memory (conversion means), 130: Fabric (first processed fabric), 132: Pocket fabric (second processed fabric).

Amendment December 4, 1980 The brief description of the drawing is amended as follows. All lines on page 30 of the specification, "70: Light emitting element...pocket cloth (second processed cloth)" are corrected as follows. "70: Light emitting element, 72: Light receiving element, 76: Reflective surface, 79: Feed dog, 110: Copy sewing control device,
130: Fabric, 132: Pocket cloth. ”

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A sewing needle capable of vertical reciprocating motion and horizontal oscillating motion, and a feed that works with a cloth presser foot to transport the workpiece fabric in a direction perpendicular to the oscillating direction of the sewing needle. a device;
A zigzag sewing machine is equipped with a control motor operatively connected to the sewing needle in order to control the lateral swing position of the sewing needle, and the position of stitch formation on the workpiece cloth is changed by driving the control motor. a cloth detector comprising a light emitting part and a light receiving part arranged close to each other in order to detect an edge of a second work cloth positioned on the placed wide first work cloth; a notch formed in the presser foot so that the edge of the second work cloth can enter from the upper front side of the presser foot that presses the first work cloth toward the rear lower side; a reflecting surface provided in front of the notch on the presser foot to reflect the emitted light from the light emitting part toward the light receiving part; a converting means for converting into a position command signal regarding a position; and a control device for controlling drive of the control motor according to the position command signal, A cloth edge tracing sewing machine characterized by forming a continuous seam to sew both processed cloths together. (2) The cloth edge tracing sewing machine according to claim 1, wherein the cloth detector is attached to an extending end extending upward from the cloth presser foot.