JPH0321732Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a material feeding structure for a sewing machine, in which a needle hole and a feed groove hole through which a lower feed dog protrudes and moves are formed in the throat plate.

[Conventional technology]

When making clothes using the sewing machine mentioned above, if the fabric of the clothes is linen material, cotton-linen blend, or loosely twisted fabric, for example, the seams of the back and sides of a jacket, or the seams of the hips of slacks. Because the damage is severe, fabric reinforcing tape is sewn onto the damaged area.

To sew the fabric reinforcing tape, the fabric reinforcing tape is placed in a predetermined position on the fabric, and then the fabric reinforcing tape is sewn together with the fabric using a sewing machine. When sewing fabric reinforcing tape to curved areas such as joints, the fabric must be moved in all directions along the bed so that the needle follows the curved area, and as the fabric position changes, the fabric There were cases where the position of the fabric reinforcing tape was moved unnecessarily.

Therefore, in the past, a guide hole for the tape was provided in the presser foot of the sewing machine to prevent the tape from shifting in the lateral direction at the presser foot (see Japanese Utility Model Application No. 58-94474). .

[The problem that the idea aims to solve]

Although the conventional structure described above is effective to some extent in preventing the fabric reinforcing tape from misaligning with respect to the fabric, it is complicated to sew while paying attention to feeding the fabric and feeding the tape at the same time. This requires skill, and each time the presser foot is moved up and down, the tape becomes loose, and this looseness tends to form wrinkles, which can easily interfere with the sewing of the tape.

To avoid such problems, for example, place a fabric reinforcing tape coated with a heat-sensitive adhesive in a predetermined position on the fabric, and then heat the fabric reinforcing tape with an iron or the like. After the adhesive is melted and solidified, a fabric reinforcing tape is attached to the fabric, and then
As mentioned above, attempts have been made to sew the fabric reinforcing tape onto the fabric, but in this case, the fabric reinforcing tape must be attached to the fabric before being sewn onto the fabric. Ironing, etc. had to be carried out, and sewing the fabric reinforcing tape was time-consuming, reducing sewing efficiency.

The purpose of this invention is to achieve the following by simply modifying the throat plate.
The purpose is to quickly and accurately sew fabric reinforcing tape.

[Means to solve the problem]

The fabric feeding structure of the sewing machine according to the present invention is such that the lower feed dog is located on the upper side of the needle plate in the fabric feeding direction than the feeding groove hole and the needle hole and near the needle hole. A passage A is formed along which the fabric reinforcing tape is fed out and guided, and a regulating surface is formed in this passage to restrict the movement of the fabric reinforcing tape in a direction perpendicular to the fabric feeding direction. The functions and effects of its configuration are as follows.

[Effect]

A regulating surface that restricts the movement of the tape in a direction perpendicular to the fabric feeding direction is formed in the path that guides the fabric reinforcing tape in the fabric feeding direction, so it can be used, for example, at the hip joint of slacks. When sewing a fabric reinforcing tape to a curved portion such as a bed, the regulating surface prevents the position of the fabric reinforcing tape relative to the fabric from shifting even if the fabric is moved in any direction along the bed. Furthermore, since the regulating surface is provided on the needle plate side of the sewing machine rather than on the presser foot side, unlike when it is provided on the presser foot side, it does not loosen as the presser foot moves up and down. In addition, the tape is automatically fed together with the fabric in synchronization with the feed action of the lower feed dog of the sewing machine, which eliminates the need to take up slack in the tape and manually feed it.

[Effect of idea]

Therefore, by simply modifying the throat plate to form a regulating surface, the position of the fabric reinforcing tape relative to the fabric can be adjusted without having to attach the fabric reinforcing tape to the fabric from the front as in the past. It was possible to accurately sew the fabric reinforcing tape onto the fabric without any deviation, and it was possible to improve sewing efficiency by speeding up the sewing work of the fabric reinforcing tape.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

1 and 2 show the fabric feeding structure of the sewing machine, which is formed below the throat plate 2 of the bed 1 in conjunction with a lower feed mechanism (not shown). Three lower feed teeth 3 are provided to provide linear feed to the lower surface of the fabric by protruding upward through the three feed groove holes 2A, and are formed on the upper part of the throat plate 2. A needle 4 and a presser foot 5 having a needle insertion portion 5A formed therein through which the needle 4 is inserted are disposed in the needle hole 2B by vertical movement.

As shown in FIG. 4, fabric reinforcing tapes 6 are disposed at two locations on the upper and lower sides of the sewing machine to be sewn onto both the front and back sides of the fabric when sewing the fabric.

First, the attachment structure of the fabric correction tape 6 located on the lower side will be explained. The fabric reinforcing tape 6 is locked to the lower end of the first wire 7 bolted to the bed 1, and A second wire rod 8 located approximately above both sides of the intermediate portion of the first wire rod 7 is fixed by the winding force of the first wire rod 7, and as the fabric reinforcing tape 6 is fed out from both ends of the second wire rod 8. The upper ends of a pair of third wire rods 9 that restrict movement in the lateral direction are inserted through the wire rods.

The reinforcing tape 6 fed out from the fabric reinforcing tape 6 is guided to the upper surface of the bed 1 through the gap between the bed 1 and the sewing machine support 10, and is also guided to the upper surface of the bed 1 by forming a groove A on the upper surface of the bed 1. It is guided to the throat plate 2 through the needle plate 2. Then, a passage A through which the fabric reinforcing tape 6 is fed and guided in the fabric feeding direction by the lower feed dog 3 is placed in a portion of the throat plate 2 located on the upper side in the fabric feeding direction from the feeding groove hole 2A. In order to form a fabric reinforcing tape 6, a pair of fabric reinforcing tape insertion holes 2C, 2C are formed in the direction perpendicular to the fabric feeding direction, and the fabric reinforcing tape 6 is inserted into the fabric feeding holes 2C, 2C. Regulations B1 and B2 are formed to restrict movement in directions orthogonal to the direction, that is, in the left-right direction and upward. In addition, 11 shown in FIGS. 1 and 2
is a cover for covering the groove 1A.

Therefore, for example, when sewing the fabric reinforcing tape 6 to a curved part such as the hip joint of slacks, even if the needle 4 moves the fabric in all directions along the bed 1 so as to follow the curved part. Therefore, the position of the fabric reinforcing tape 6 relative to the fabric does not move.

Next, the attachment structure of the fabric reinforcing tape 6 located on the upper side will be explained. As shown in FIG. It has been done. Then, the tape 6 fed out from this fabric reinforcing tape 6 is attached to a guide member 1 welded to the presser foot 5.
4 to the throat plate 2. Note that 20 shown in the figure is a bracket for guiding the tape. The guide member 14 includes a path A through which the fabric reinforcing tape 6 is fed and guided in the fabric feeding direction by the lower feed dog 3, and a direction perpendicular to the fabric feeding direction of the fabric reinforcing tape 6, that is, the left-right direction. Even if the fabric is moved in all directions along the bed 1 as described above by forming regulating surfaces B1 and B2 (see Fig. 3) that restrict upward movement, the fabric reinforcing tape 6 will not move against the fabric. The position does not change.

[Another example]

In the embodiment described above, a pair of fabric reinforcing tape insertion holes 2C, 2C formed in the throat plate 2 formed a path A for guiding the fabric reinforcing tape 6 in the fabric feeding direction. As shown in FIG. 8, a concave portion 2D is formed in the throat plate 2, and a sliding plate 15 adjacent to the throat plate 2 is connected to the concave portion 2D in order to enter the concave portion 2D from above and sandwich the fabric reinforcing tape 6. The passage A may be formed from the protruding piece 15A. the pair of fabric reinforcing tape insertion holes 2C;
2C, as shown in FIGS. 5 and 6, a protruding piece 15A that covers only the central portion of the opening K formed in the throat plate 2 may be formed in series with the sliding plate 15. Alternatively, as shown in FIG. 9, it may be an I-shaped groove 2E formed in the throat plate 2, or as shown in FIG. It may be a pair of sections 16, 16 that face each other, or it may be a protrusion 17 that curves upward as shown in FIG. 11, and the specific structure for forming the passage A can be freely changed.

Further, in the embodiment described above, the movement of the fabric reinforcing tape 6 in the horizontal direction and upward is restricted, but as shown in FIG. A pair of protrusions 18,1
8 upright, or as shown in FIG.
In order to guide the movement of the fabric reinforcing tape 6, a guide groove 2F may be formed along the fabric feeding direction to restrict movement of the fabric reinforcing tape 6 only in the left-right direction.

Further, in the above embodiment, the fabric reinforcing tape 6 is sewn to both the front and back sides of the fabric, but it may be sewn to only one side of the fabric.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the fabric feeding structure of the sewing machine according to the present invention, FIG. 1 is a plan view of the main part, FIG. 2 is a longitudinal cross-sectional side view of the main part, and FIG. 3 is a guide member. FIG. 4 is a partially cutaway front view of the sewing machine. 5 and 7 are perspective views showing another embodiment of the main part, FIGS. 6 and 8 are longitudinal sectional views showing another embodiment of the main part, and FIGS. 9 to 13 are perspective views of the main part. It is a perspective view which shows another Example. 2...throat plate, 2A...feed slot hole, 2B...needle hole, 3...lower feed dog, 6...fabric reinforcement tape,
A...Aisle, B...Regulation side.

Claims (1)

[Scope of utility model registration request] This is a fabric feeding structure of a sewing machine in which a needle hole 2B and a feed groove hole 2A for protruding and moving a lower feed dog 3 are formed in the throat plate 2, and the feed groove hole 2A and the feed groove hole 2A of the throat plate 2 are formed. A path A for feeding and guiding the fabric reinforcing tape 6 along the fabric feeding direction by the lower feed dog 3 is formed at a position above the needle hole 2B in the fabric feeding direction and near the needle hole 2B. In the fabric feeding structure of the sewing machine, regulating surfaces B1 and B2 are formed in the passage A to restrict the movement of the fabric reinforcing tape 6 in a direction perpendicular to the fabric feeding direction.