JP3395267B2 - Overlock sewing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overlock sewing machine using a thread spool, and more particularly, to a method for easily sewing a string for sewing a tape or a decorative thread. It was done. 2. Description of the Related Art In a shoulder joint process of a polo shirt or a sweater sewn with an elastic material such as a knitted fabric, the shoulder portion may be stretched due to washing or the like, and may lose its shape. In order to prevent this, a tape or thread is sewn to prevent stretching and reinforcement during sewing. In addition, decorative threads such as wool may be sewn. A sewing thread of an overlock sewing machine is guided to a thread tension from a bobbin mounted on a thread stand at the rear of the sewing machine via a guide wire above the bobbin, and then sent to a needle and a looper. On the other hand, the tapes and the like enter under the presser foot from the guide hole just before the needle groove of the presser foot and are guided to the needle groove. [0004] However, the conventional overlock sewing machine is not provided with a guide means for guiding these tapes, so that the operator can place the tapes on the knee, I had to put the tapes out on the table. For this reason, during sewing, there was a problem that the tapes were dropped on the floor or hooked by hand, resulting in poor workability, and a good product could not be obtained. As a proposal that can cope with this, Japanese Utility Model Application Laid-open No.
Japanese Patent Application Laid-Open No. 193373 describes that a ring-shaped guide means is appropriately attached to a guide wire of a thread stand so as to be detachable. However, in this case, since the guide means is detachable, the guide means may be lost. Further, since the tapes are directly guided to the presser foot from the guide wire, the tapes are generally hung on the sewing machine housing and guided to the presser foot when the guide wire is located behind the sewing machine head. Therefore, it may be caught by other members,
The problem that the sewing work is hindered, such as being caught on the hand, is not solved. Therefore, further guide means is required on the way between the wire guide and the presser foot.
It will be provided to protrude on the side or front surface of the sewing machine housing, which impairs the appearance of the sewing machine.On the side or front surface of the sewing machine housing, a presser foot lever that moves the presser foot up and down is provided. There remains a problem that the guide means interferes with the operator's hand and hinders the sewing operation. According to the present invention, the handling of the tapes placed on the table is good, and the supply of the tapes by the guide means is good. Even when the presser foot moves up and down, the guide means interferes with the hand of the sewing operator. It is an object of the present invention to provide an overlock sewing machine that is prevented from being operated. According to the present invention, there is provided a first guide means provided with guide means for another sewing thread provided on a guide wire of a thread base, and the above-mentioned sewing thread at the time of overcasting of a sewing product. A presser foot having a guide hole for a sewn string body sewn to a sewing product, a presser foot lever rotatably mounted on a side of the sewing machine housing above the presser foot, and the presser foot lever And a second guide means fixed between the presser lever and the presser lever so as to rotate between the presser lever and the side of the sewing machine housing. The first guide means of the present invention is provided on a guide wire together with other thread guide means. The second guide means is provided on the side of the sewing machine housing above the presser foot in a state hidden by the presser foot lever. The presser foot lever
The sewn string that is above the presser foot, and thus hangs down from the second guide means, is guided to the presser foot along a path that hangs substantially without coming off from above the presser foot, and may interfere with other members. Therefore, the handling is easy without interfering with the hands of the sewing operator, and the sewing operation is facilitated. Further, the second guide means is hidden in the gap between the side of the sewing machine housing and the presser foot lever, and is moved integrally with the presser foot lever, so that the appearance of the sewing machine is not impaired. An embodiment of an overlock sewing machine according to the present invention will be described below in detail with reference to FIGS. FIG.
In the figure, reference numeral 1 denotes an overlock sewing machine of the present embodiment, and a support 4 on which a single guide wire 3 is installed and a thread stand 2 on which a plurality of thread stands 5 are planted are installed behind the overlock sewing machine. I have. Each thread stand 5 is loaded with a thread spool 6 wound around each spool. A needle T attached to the lower end of the sewing machine head 10 is moved up and down by guide rings 7 formed on the guide wire 3 via corresponding thread guides 8 and thread tensions 9 and the like. The needle 11a of the rod 11 is inserted. A presser foot 13 supported by the sewing machine head 10 is opposed to a needle plate 12 from which the needle 11a is dropped. The presser foot 13 is rotatably provided on one side of the sewing machine housing. By rotating the lever 14, the lever 14 comes into contact with and separates from the needle plate 12. More specifically, as shown in FIG. 2, the presser foot lever 14 is a dish-shaped member having an enlarged base and a reduced distal end, and a boss 14a is protruded from substantially the center of the enlarged base. It is connected via a knob spring 15 to a cam shaft of a presser foot vertical movement cam in the sewing machine housing. Therefore, the presser foot 13 can be moved up and down by rotating the presser foot lever 14 around the boss 14a on the reduced front end side. The above configuration is the same as that of the conventional apparatus. When the needle thread 11 is moved up and down and the balance is operated, the sewing thread T is fed out from the thread winding body 6 and the overlock sewing is performed. The looper and the needle bar 11 cooperate to perform the overlock sewing in which the sewing thread (upper thread) and the looper thread (lower thread) of the needle 11a are entangled. In the overlock sewing machine according to the present embodiment, first, the guide wire 3 is provided with the guide ring 17 constituting the first guide means of the present invention independently of the ordinary spool 6. The guide ring 17 is provided with a sewn string 19 which is sewn together at the time of overcasting and is fed out from a wound body (not shown) such as a tape or a thread for reinforcing or decorating the sewn material edge. It is inserted like other sewing threads T. Then, the sewn string 19 via the guide ring 17
As shown in FIG. 3, a guide formed at the leading end of the presser foot 13 in the sewing progress direction via a guide ring 18 inside the presser foot lever 14 attached to the sewing machine housing side portion 20 with a certain gap. It is inserted into the hole 13a. The guide ring 18 constitutes a second guide means of the present invention, and as shown in detail in FIG.
8a, the other end of which is rolled inward in an elliptical shape to form an inner through hole 18b.
It is moored in a locking hole 18c formed on one end side. A boss 14b for mounting the guide ring 18 is formed on the presser lever 14, and the boss 14b is fastened to the boss 14b by a small screw 19 that passes through 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 further rearward above the sewing machine housing side portion 20. . This prevents the passage of the sewn cord 19 from interfering with other members. According to the overlock sewing machine having the above configuration, the sewn string 19 is provided so as to be hidden by the guide ring 17 formed integrally with the guide wire 3 and the gap between the sewing machine housing side portion 20 and the presser foot lever 14. The guide ring 18 is inserted into the guide hole 13a of the presser foot 13 and sewn together at the time of overcasting. Accordingly, the sewn string 19 is guided from above the guide wire 3 to the presser foot lever 14 like other sewing threads T. The presser foot lever 14 is
3 and, therefore, the sewn string 19 hanging down from the guide ring 18 is guided to the presser foot 13 along a path that almost hangs without coming off from above the presser foot 13 and interferes with other members. And does not interfere with the hands of the sewing operator, handling is facilitated, and the sewing operation is facilitated. 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 and moves integrally with the presser foot lever 14, the appearance of the sewing machine is not impaired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing one 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 sewn string body sewn to a sewing product at the time of overcast sewing. [Description of Signs] 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 ... string for sewing.

Continuation of the front page (56) References JP-A-56-151085 (JP, A) JP-A-62-295688 (JP, A) JP-A-59-193373 (JP, U) JP-A-61-110389 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D05B 53/00 D05B 29/02 101 D05B 29/06 D05B 35/06

Claims (1)

(57) [Claim 1] First guide means provided with guide means for another sewing thread provided on a guide wire of a thread body stand, and sewing by the sewing thread at the time of overlock sewing of a sewing product. A presser foot formed with a guide hole of a sewn string body sewn to an object,
A presser foot lever rotatably mounted on the side of the sewing machine housing above the presser foot, between the presser foot lever and the side of the sewing machine, which is turned by the turning operation of the presser foot lever. Second guide means fixed to the inside of the presser foot lever to insert the sewn string into the guide hole of the presser foot via the first guide means and the second guide means. Overlock sewing machine characterized by doing.