JPH0179476U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of a welt stitch sewing machine embodying this invention, Fig. 2 is a partially enlarged cross-sectional view showing the clamping state of work cloth by a clamping device and a binder, and Fig. 3 is a sewing thread cutting. FIG. 4 is a partially enlarged sectional view of the suture cutting device; FIGS. 5a to 5c are in a ready position;
FIG. 3 is a schematic side view showing the correspondence between the clamp device and the movable knife body at a thread release position and a thread cutting position. 4... Needle constituting the stitch forming device, 5... Clamping device constituting the cloth transporting means, 12... Sewing thread cutting device, 15... Air cylinder as driving means, 18... Moving knife body, 18a... ...Capturing unit, 19
... fixed knife body, 21 ... thread clamp holder as holding means, 24, 25 ... first and second sensors as detection means.

Claims (1)

[Claims for Utility Model Registration] 1. A stitch forming device including a needle 4, which is arranged so as to pass near the needle 4 on the sewing machine table 2, and the workpiece cloths W1, W2, W3 are moved along the vertical movement path of the needle 4. In the sewing machine, the sewing machine is equipped with a cloth transfer means 5 that is supported by the sewing machine frame 1 in the vicinity of the needle 4, and is configured to capture the sewing thread T that is continuous between the needle 4 and the workpiece cloths W1 to W3. A movable knife body 18 having a catching portion 18a, and a movable knife body 18 that is connected to the needle 4 and the work cloth W1 to
a driving means 15 that reciprocates in a direction intersecting the sewing thread T between W3;
A fixed knife body 19 for cutting the sewing thread T captured by the capture portion 18a in cooperation with the movable knife body 18.
a holding means 21 which is provided on the sewing machine frame 1 and holds the needle side limb of the sewing thread T after cutting; and the driving means 15 is provided facing the movable knife body 18, and the movable knife body 18 is It is characterized by comprising detection means 24 and 25 for outputting a detection signal when the cloth is moved to a predetermined position close to the cloths W1 to W3 and switching the operation of the driving means 15 from forward movement to backward movement. A sewing thread cutting device for sewing machines. 2. The sewing machine according to claim 1, wherein the driving means is constituted by an air cylinder 15, and the detection means 24, 25 are attached to the outer periphery of the air cylinder 15 so as to be movable and adjustable in the axial direction thereof. Suture cutting device. 3 The two needles 4 are provided on a line perpendicular to the cloth transport direction, and the cloth transport means 5 includes a large presser plate 6 for pressing the body cloth W1 onto the table 2 surface on both sides of both needles 4, and a large pressing plate 6 for pressing the body cloth W1 onto the table 2, The beaded cloth W2 placed on the cloth W1 is bent from both sides to form the body cloth W1.
Utility model registration claim 1 A sewing thread cutting device for a sewing machine according to item 1 or 2. 4. The sewing thread of the sewing machine according to claim 3, wherein the cloth transfer means 5 is provided with a flap presser body 8 that presses and holds the flap cloth W3 placed on the welt cloth W2 on the folding plate 7. Cutting device.