JPH0414079U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the adjustment body in the thread cutting device of the eyelet sewing machine according to the invention, Fig. 2 is a plan view showing the eyelet, and Fig. 3 is the upper thread. A side view showing the configuration of the cutting mechanism;
FIG. 4 is a side view showing the configuration of the knife moving means, FIGS. 5 to 8 are views showing conventional examples, and FIG. Fig. 6 is a side view showing the contact body and shows the state of engagement between the contact body and the notch body when forming the first straight seam, and Figure b shows the state in which the contact body and the notch body are in contact with each other. Figure B is a side view showing the notch body rotating due to the movement of the abutting body, and Figure 7 is a side view showing the notch body rotating when the abutting body moves. Figure a is a side view showing the state in which the contact body and the notch body are in contact with each other, and Figure b is a side view showing the state in which the notch body is lowered due to the movement of the contact body. FIG. 8 is a side view showing the position of the needle thread and the workpiece holding plate when the needle thread is cut by the needle thread trimming knife. In the figure, A...eyelet hole, B...needle thread cutting mechanism, C...knife moving means, E...adjustment body, P...
Sewn object holding plate, D... Needle thread, 9... Notched body, 1... First straight stitch, 2... Circular stitch, 3... Second straight stitch.

Claims (1)

[Scope of claim for utility model registration] An upper sewing mechanism that includes a sewing needle and a mechanism for driving the sewing needle and is rotatable along the circular hole of the eyelet, and a needle plate that has a needle hole. a lower sewing mechanism that supports a looper or the like that cooperates with the sewing needle to form a seam and is rotatable along the circular hole of the eyelet; a workpiece holding plate movable in the direction of the straight seam; the workpiece holding plate is moved to form the first straight seam of the eyelet, and then the upper sewing mechanism and the lower sewing mechanism are rotated synchronously. In the eyelet sewing machine device, the lower sewing mechanism moves to form a seam in the circular hole of the eyelet, and then moves the workpiece holding plate in the opposite direction to form a second straight seam. a needle thread cutting mechanism that includes a needle thread cutting knife that can advance to a loop-shaped needle thread formed by a sewing needle between a throat plate and a looper and cuts the needle thread when advancing the needle thread; , an adjusting body whose position is adjustable in the same direction as the moving direction of the workpiece holding plate, and a first workpiece holding plate that comes into contact with the adjusting body during sewing movement of the workpiece holding plate. When moving in the direction of forming a straight seam, it escapes, and when the avoidance sewing object holding plate moves in the direction of forming a second straight seam, the notch body engages with the adjusting body, and the notch body is connected to the notch body, and the notch body a knife moving means that is driven together with the notch body to advance the needle thread cutting mechanism in the direction of the needle thread when engaged with the adjusting body; A thread trimming device for an eyelet sewing machine, characterized in that the length of the needle thread remaining and the length of the needle thread remaining on the workpiece can be adjusted.