JPH0210993Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flat type sewing machine for sewing a tape supplied from a tape attaching binder onto body fabric.

Sewing machines that sew stockinette fabrics are usually equipped with a differential feed dog in front of the main feed dog, and when sewing in the horizontal direction (course) where there is a large degree of expansion/contraction, the differential feed dog is The feed movement is large, and when sewing in the vertical direction (wale), the movement of the differential feed dog is made smaller than the movement of the main feed dog.
Conventionally, flat-type sewing machines for removing rough patches are not equipped with differential feed teeth in the tape insertion section from the binder, so if differential feed is applied to the body fabric, differential feed cannot be applied to the tape. In addition, there may be a difference in the amount of feed between the parts of the fabric where differential feeding can be applied and the areas where the tape overlaps and cannot be applied. As a result, both parts cannot be fed at a uniform feed rate, which may cause wrinkles or distortion in the sewn part of the fabric. These problems have hitherto been compensated for by corrections made by skilled workers during sewing, but this requires a high level of skill and also reduces efficiency.

In conventional flat-type sewing machines, the auxiliary presser foot for body fabric attached to the main body of the tape presser foot does not operate differentially even though the presser foot is fully exerted on the main feed dog side. It did not act sufficiently on the feed dog side, and therefore it was not possible to fully utilize the differential feed for the body fabric.

In order to make this inefficient and highly skilled sewing process more efficient and easier, the present invention has been developed by attaching a spring to the auxiliary presser foot for the body fabric, so that the point of action of the spring is It is located above the differential feed dog under the auxiliary presser foot so that the differential feed can be fully applied to the body fabric, and the differential feed dog is located on the body fabric side at the tape insertion part from the binder. A differential feed dog that performs the same differential feed movement as the feed dog is provided, and a cloth presser portion for the differential feed dog is provided on the tape insertion side of the presser foot to ensure the differential feed movement. It is.

To explain this with the drawings, Fig. 1 shows the main parts of the flat type sewing machine for removing roughness according to the present invention.
As shown in the figure, three rows of differential feed teeth 3 are provided which perform the same differential feed movement as the differential feed teeth 2 provided on the body material G side. On the other hand, the presser foot is rotatably pivoted to the presser bar 5 like the known one, and is tilted upward so that the tape T on the tape insertion side can be easily inserted, and the amount of inclination can be adjusted with the screw 6. It has a presser foot main body 7 for holding the tape, and an auxiliary presser foot 8 for body fabric that is pivoted to the main body. The presser foot part 9 is formed to extend from the auxiliary presser foot 8 to ensure that the tape T is fed differentially. The spring 10 is used to press the auxiliary presser foot 8, and the differential feed dog 2 is able to sufficiently feed the body material G (in contrast to the conventional model, the differential feed is applied only to the body material G). The auxiliary presser foot 8 has a differential feed dog 2, which is designed so that it does not become unstable.
It was not possible to press the cloth on top sufficiently. )
It's different.

In the figure, 11 is a main feed dog.

As described above, in the flat type sewing machine for removing rough patches of the present invention, it is possible to fully utilize the differential feed for both the tape body fabric, and for this reason, it is possible to give uniform differential feed to the body fabric and the tape. In addition, the body fabric can be fed evenly between the part where the differential feed is applied directly and the part where it overlaps with the tape, and the body fabric is fed evenly to prevent wrinkles or distortion of the body fabric. There is no need to make manual corrections, and therefore even unskilled workers can perform the work, and work efficiency is greatly improved.

In addition, when it is necessary to sew consecutively in the horizontal and vertical directions of stockinette fabric with different degrees of stretch, such as when removing looseness from the round neck of stockinette underwear, the known intermittent mechanism (during sewing) is used. , a mechanism that can arbitrarily change the differential ratio of the differential feed dog to the main feed dog), it is possible to solve the conventional problem of stretching of the round neck part of underwear due to taping.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a flat type sewing machine for removing lapels according to the present invention, and FIG. 2 is a perspective view of the main parts of the sewing machine with the presser foot and binder removed. 1... Binder, 2, 3... Differential feed dog, 7
... Presser foot body, 8 ... Auxiliary presser foot, 9 ... Presser foot section, 10 ... Spring.

Claims (1)

[Scope of utility model registration request] The main feed dog 11 located behind the needle drop, and the main feed dog 1 for stretch sewing located on the body fabric side in front of the needle drop.
a differential feed dog 2 whose feed amount relative to 1 can be changed;
Tape presser foot main body 7 provided opposite to the main feed dog 11 and pivotably pivoted to the presser bar.
and an auxiliary cloth presser foot 8 which is pivoted to the main body 7 in line with the cloth side of the main body and is provided facing the main feed dog 11 and the differential feed dog 2, and a presser foot. In a flat type sewing machine for removing roughness, a binder 1 for supplying the tape T is provided in front of the presser foot body 7 and the binder 1 in the feeding direction.
A differential feed dog 3 is located in front of the needle drop between the main feed dog 11 and can change the amount of feed to the main feed dog 11; 3. Fabric presser foot 9 extending upward
and a spring 10 attached to the side of the presser foot main body 7 and engaged with the upper surface of the auxiliary presser foot 8 above the differential feed dog 2 to press the auxiliary presser foot 8 downward. , the differential feed dog 3 on the tape side and the differential feed dog 2 on the cloth side work differentially with respect to the main feed dog 11 in cooperation with the presser foot 9, the auxiliary presser foot 8, and the spring 10, respectively. A flat type sewing machine for removing rough patches, which is characterized by a feeding function.