JPH0418878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fabric fraying device for an automatic surging machine for removing fraying from fabrics with thick weaving threads, such as serge fabrics and gear baggine fabrics.

Prior Art In general, for cloths with thick weaving threads such as serge cloths and gear bagin cloths, after cutting, as shown in Fig. 4,
When the cut fabric 1 is moved from the cutting table to the sewing process, the thread 3 becomes frayed from the cut edge 2 of the cut fabric 1, so even if an overlock stitch 4 is applied to the cut edge 2 in the serging process as shown in FIG. Long threads 3 come out on the outside and inside of the overlock stitch 4, making it impossible to completely cut the frayed edges of the cut surface with the scalpel 9. Therefore,
As shown in Figure 6a, after combining two pieces of cut fabric 1 with overedge stitch 4 and performing ground stitch 5, when the cut fabric 1 is turned over at the area where the overedge stitch 4 has been applied, the fabric 1 comes out from the overedge part 4. Since the weaving threads 3 come out on the front side as shown in FIG. 6b, the weaving threads 3 have to be cut off as thread waste using hand scissors or the like, resulting in a problem of extremely low work efficiency.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention works with the cloth feed of the cloth feed teeth to remove the fraying of the cut end of the cut cloth piece so as to move the cloth forward in the cloth feed direction of the presser foot. In an automatic serging machine, an overstitch is applied to the cut end using a sewing machine while cutting with a knife installed in the machine, and a two-pronged suction port connected to a vacuum pump is connected to a vacuum pump at a distance in front of the knife in the cloth feeding direction. is provided in close proximity to the cut cut, and is arranged so that the cut cut of the cloth piece can be passed through the two-pronged suction port while being sucked, so that the frayed thread can be pulled out in the suction direction and cut with the scalpel. It is characterized by

Function According to the present invention, since the two-pronged suction port which pinches the cut end of the cut cloth at an interval is provided in front of the knife in the cloth feeding direction, frayed weaving threads are removed from the cut end of the cut cloth. , by sucking in the suction port,
Since it is pulled out in one direction, it can be easily cut with a scalpel, and then the overseam is applied, so no frayed threads come out from the overseam. too,
No yarn comes out at all.

Embodiment FIG. 1 is a schematic perspective view of an automatic surging machine according to an embodiment of the present invention, and FIG. 2 is a sectional view of the main part of FIG. 1, in which a presser foot 7 and a needle are provided on a table 6. A sewing machine consisting of a needle bar 8 and a knife 9 is provided.

Further, the cut cloth 10 is sent in the cloth feeding direction indicated by the arrow, and a hole 11 is provided in the table 6 in front of the knife 9 in the cloth feeding direction to which the cloth 10 is fed so that the cutting cut 10a can pass through the center. , this hole 11
A suction port 12 shown in FIG. 2 is provided at the bottom. The suction port 12 is formed into a bifurcated shape by suction guide pieces with parallel tips, and one of the suction guide pieces is disposed in the hole of the table along the table surface. When the sewing machine operates, the cloth is fed into the center of the parallel air intake guide pieces, and the air intake guide pieces are positioned along the front and back sides of the fabric. This suction port 12 is connected to the hose 1
3 is connected to a suction tank and vacuum pump for separating thread waste.

In the automatic surging machine of this embodiment configured as described above, when the main switch is turned on, the electronic control unit, the vacuum pump, and the sewing machine motor are operated, and the air pressure in the suction tank is increased. At this time, the suction force is adjusted so that the suction port 12 does not suction the frayed thread too rapidly. Here, when the cut end 10a of the cut cloth 10 is inserted into the suction port 12, as shown in FIG. Since the air flows along the direction of the cutting edge 10a, it is possible to force the air to act strongly on the frayed threads 10b on the front and back surfaces of the cloth, and if the frayed threads and the fibers of the fabric become entangled or the frayed threads Even if the cloth is long and there is resistance to pulling it out in the direction of the cutting cut 10a, the frayed yarn 10b is easily sucked by air from the cut cut 10a of the cloth 10, and all the frayed threads 10b are removed as shown in FIG. 3b. aligned in the suction direction as shown. When the cloth 10 is further fed, a photoelectric switch is activated in front of the knife 9 of the sewing machine, and the sewing machine is driven, and the knife 9 and the feed dog are also activated.As shown in FIG.
The frayed threads 10b aligned in the direction a are all cut by the knife 9. Thereafter, an overlock stitch is applied to the cut end 10a of the cloth 10 using a sewing machine.

In this way, in the automatic surging machine of this embodiment, the frayed threads 10b coming out of the cutting cut 10a of the cloth 10 are suctioned by the suction port 12 and aligned in the same direction, and all the frayed threads 10b are cut by the scalpel 9. Since the frayed threads 10b do not come out from the overlocked cloth 10, there is no need for a fuzz removal process after sewing, which improves work efficiency and improves the quality of the product. There is.

In the above embodiment, the cut end 10a of the cloth 10 is passed through the two-pronged suction port 12 to suction the frayed threads 10b of the cut end 10a and align them in the same direction. The frayed threads 12b at the cut end 12a may be aligned in one direction by blowing air from a compressor from above and below.

Effects of the Invention As is clear from the above explanation, the present invention pulls out the frayed threads coming out from the cutting edge of the cloth in the suction direction so that all the threads can be cut with the scalpel of the sewing machine. Since no frayed threads come out of the sewn fabric, there is no need for the fluff removal process that was conventionally performed after sewing, which has the advantage of improving work efficiency and quality.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of an automatic surging machine according to an embodiment of the present invention, Fig. 2 is a sectional view of the main part of Fig. 1, and Fig. 3 shows the operation of the automatic surging machine of Figs. 1 and 2. FIG. 4 is a plan view of a cut cloth, FIG. 5 is a plan view of a cloth with overlock stitches applied to the periphery, and FIG. 6 is a view for explaining the drawbacks of the conventional example. 6... table, 7... cloth presser foot, 8... needle bar, 9... scalpel, 10... cloth, 11... hole, 12... suction port, 13...
hose.

Claims (1)

[Scope of Claims] 1 Overstitching is performed while cutting the cut end of the cut piece of cloth using a knife provided in front of the cloth presser in the cloth feed direction in cooperation with the cloth feed of the cloth feed dog. In the automatic surging machine, a hole is formed in the table in front of the scalpel in the cloth feeding direction, and is formed into a forked shape by a hole formed so that the cutting cut passes through the center, and an intake guide piece with a parallel tip. a suction port in which one of the suction guide pieces is placed in the hole of the table along the table surface so that a piece of cloth is carried into the center of the parallel suction guide pieces; and a suction port at the base end of the suction port. A fabric fraying device for an automatic surging machine, characterized by comprising a vacuum pump connected to the fabric.