JPH0747183A - Overlock sewing machine - Google Patents

Abstract

PURPOSE:To guide a sewing string to sew on a stitch at darning to a pressing metal to improve the workability. CONSTITUTION:A first guide means 17 is provided in a guide wire of a thread base together with guide means of other sewing threads and also a second guide means 18 positioned between a pressing metal lever 14 and a machine housing side 20 and fixed inside the pressing metal lever 14 is provided so as to be rotatable with the rotary manipulation of the pressing metal lever 14. A sewing string 19 is inserted in the guide hole of a pressing metal 13 through the first guide means 17 and the second guide means 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overlock sewing machine using a thread winding, and more particularly, to an operation for sewing a tape or a thread for sewing a decorative thread.

[0002]

2. Description of the Related Art In the shoulder joint process of polo shirts and sweaters sewn with stretchable cloth such as knitted fabric, the shoulders are kept in a stretched state due to washing or the like so as not to lose their shape. At the time of sewing, tapes and threads are sewn to prevent stretching and reinforcement. Also, decorative threads such as wool may be sewn in.

The sewing thread of the overlock sewing machine is guided from the bobbin mounted on the thread stand at the rear of the sewing machine to the thread tension via the guide wire above the bobbin, and then sent to the needle and the looper. On the other hand, the tapes are adapted to enter into the needle groove below the presser foot through a guide hole in front of the needle groove of the presser foot.

[0004]

However, since the conventional overlock sewing machine is not equipped with a guide means for guiding these tapes, the operator puts the tapes on the knees or on the table. I had to put it out and put out the tapes. Therefore, during sewing, tapes are dropped on the floor or hooked by hand, resulting in poor workability and a problem that a good product cannot be obtained.

[0005] As a proposal that can cope with this, the actual exploitation Sho 59
Japanese Patent Laid-Open No. 193373 discloses that a ring-shaped guide means is detachably attached to a guide wire of a thread stand. However, in this case, the guide means may be detachable, so that it may be lost. Further, since the tapes are directly guided to the presser foot from the guide wire, the tapes are generally guided to the presser foot by being positioned behind the sewing machine head portion so that the tapes hang on the sewing machine housing. Therefore, it is caught on other members,
The problem of being caught in the hand and hindering the sewing work cannot be solved.

Therefore, a guide means is required in the middle of the wire guide and the presser foot. In this case, the guide means is
Since it is provided so as to project to the side surface or front surface of the sewing machine housing, the appearance of the sewing machine is impaired, and a presser foot lever for moving the presser foot up and down is provided on the side surface or front surface of the sewing machine housing. There remains a problem that the guide means interferes with the hand of the operator and hinders the sewing work.

According to the present invention, the tapes placed on the table can be handled easily, and the guide means can easily supply the tape. Even when the presser foot moves up and down, the guide means interferes with the hand of the sewing operator. The purpose of the present invention is to provide an overlock sewing machine that does not need to do so.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a first guide means provided together with other guide means for a sewing thread provided on a guide wire of a thread stand, and a sewing article by the sewing thread when overedging a sewing article. A presser foot having a guide hole for a sewing thread to be sewn on, a presser foot lever rotatably mounted on a side of a sewing machine housing above the presser foot, the presser foot lever and the sewing machine. An overlock sewing machine having a second guide means fixed to the inside of the presser foot lever so as to be rotated by a rotating operation of the presser foot lever between the housing side portion.

[0009]

The first guide means of the present invention is provided on the guide wire together with the other guide means for the sewing thread. The second guide means is provided on the side of the sewing machine housing above the presser foot in a state of being hidden by the presser foot lever. The presser foot lever
The sewing thread body that is above the presser foot and hangs down from the second guide means is guided to the presser foot in a substantially hanging path without coming off from above the presser foot, and interferes with other members. In addition, there is no interference with the hands of the sewing operator, the handling is easy, and the sewing operation is easy.

Further, since the second guide means is hidden in the gap between the side part of the sewing machine housing and the presser foot lever and moved together with the presser foot lever, the appearance of the sewing machine is not impaired.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an overlock sewing machine according to the present invention will be described in detail below with reference to FIGS. Figure 1
In the figure, reference numeral 1 indicates the overlock sewing machine of the present embodiment, and behind it, a column 4 on which a single guide wire 3 is installed and a thread stand 2 on which a plurality of thread stand bars 5 are planted are installed. There is. A thread winding body 6 wound around each spool and loaded with a sewing thread is loaded on each thread spool bar 5. The sewing thread T fed out from the bobbin 6 moves up and down by the guide rings 7 formed on the guide wire 3, and the needles attached to the lower end of the sewing machine head 10 via the corresponding thread guides 8 and thread tensioners 9 and the like. The needle 11a of the rod 11 is inserted. A presser foot 13 supported by the sewing machine head 10 faces a needle plate 12 on which the needle 11a is dropped, and the presser foot 13 is rotatably projected on one side of the sewing machine housing. By rotating the lever 14, the needle plate 12 is brought into contact with and separated from the needle plate 12.

More specifically, as shown in FIG. 2, the presser foot lever 14 is a dish-shaped member composed of an enlarged base portion and a contracted tip portion. A boss 14a is provided so as to project from substantially the center of the enlarged base portion. It is connected to the cam shaft of the presser foot vertical movement cam in the sewing machine housing through the knob spring 15. Therefore, the presser foot 13 can be moved up and down by rotating the presser foot lever 14 around the boss 14a on the side of the reduction tip.

The above is the same construction as the conventional apparatus, and when the needle thread 11 is moved up and down and the balance is moved, the sewing thread T is fed out from the bobbin winding body 6 and each of the looper case 16 is sewn when overedging is performed. The looper and the needle bar 11 cooperate with each other to perform overedging in which the sewing thread (upper thread) and the looper thread (lower thread) of the needle 11a are entwined. In the overlock sewing machine of the present embodiment, first, the guide wire 3 is provided with the guide ring 17 which constitutes the first guide means of the present invention independently of the ordinary bobbin 6. A string 19 for sewing is sewn together with the guide ring 17 at the time of overedging, and is sewn from a roll (not shown) of tape or wool for reinforcing or decorating the edge of the sewn product, It is inserted like other sewing threads T. Then, the string body 19 for sewing through the guide ring 17
The guide is formed at the tip of the presser foot 13 in the sewing direction as shown in FIG. 3 via the guide ring 18 inside the presser foot lever 14 mounted on the side 20 of the sewing machine housing with a certain gap. It is inserted into the hole 13a.

The guide ring 18 constitutes the second guide means of the present invention, and as shown in detail in FIG.
8a, and the other end side is elliptically wound inward to form an inner through hole 18b.
It is anchored in a locking hole 18c formed on one end side. A boss 14b for mounting the guide ring 18 is formed on the presser foot lever 14, and the boss portion 14b is fastened to the boss portion 14b by a machine screw 19 penetrating the mounting hole 18a.

In this embodiment, the sewing machine housing side portion 20 extends above the presser foot 13, and the guide ring 17 of the wire guide 3 described above is provided at the rear portion above the sewing machine housing side portion 20. . This prevents the passage of the sewing string 19 from interfering with other members. According to the overlock sewing machine configured as described above, the sewing thread body 19 is provided so as to be hidden in the gap between the guide ring 17 formed integrally with the guide wire 3, the sewing machine housing side portion 20, and the presser foot lever 14. Via the guide ring 18 and the guide ring 18, and is inserted into the guide hole 13a of the presser foot 13 and sewn together at the time of overedging.

Therefore, the sewing thread 19 is hung from above the guide wire 3 and guided to the presser foot lever 14 in the same manner as the other sewing thread T. The presser foot lever 14 is a presser foot 1
3, and therefore the sewing cord body 19 hung from the guide ring 18 is guided to the presser foot 13 in a substantially downward path without coming off from above the presser foot 13 and interferes with other members. In addition, it does not interfere with the hands of the sewing operator, and the handling becomes easy and the sewing operation becomes easier.

Further, since the guide ring 18 is hidden in the gap between the side portion 20 of the sewing machine housing and the presser foot lever 14 so as to move integrally with the presser foot lever 14, the appearance of the sewing machine is not impaired.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an overlock sewing machine of the present invention.

FIG. 2 is an exploded perspective view showing a mounting structure of a second guide means to a presser foot lever according to the present invention.

FIG. 3 is a perspective view showing a sewing string body that is sewn to a sewing product at the time of overedging.

[Explanation of symbols]

1 ... Overlock sewing machine, 3 ... Guide wire, 11 ...
Needle bar, 13 ... Presser foot, 14 ... Presser foot lever, 17 ... Guide ring (first guide means), 18 ... Guide ring (second guide means), 19 ... Sewing string.

Claims (1)

[Claims] 1. A first guide means provided together with other guide means for a thread provided on a guide wire of a thread stand, and a sewing string which is sewn to the sewn article by the thread when overedging the sewn article. A presser foot with a body guide hole,
A presser foot lever rotatably mounted on the side of the sewing machine housing above the presser foot, and a rotation between the presser foot lever and the sewing machine housing side portion caused by a rotating operation of the presser foot lever. And a second guide means fixed to the inside of the presser foot lever to insert the sewing thread into the guide hole of the presser foot through the first guide means and the second guide means. An overlock sewing machine characterized by doing