A presser foot for a flat sewing machine

Abstract

The utility model discloses a presser foot for a stretch sewing machine, comprising a bottom plate, an avoidance groove at the bottom of the bottom plate, a pressure block in the avoidance groove, the pressure block can move up and down in the avoidance groove, when the pressure block is at the lowest position, the lower part of the pressure block is lower than the lower part of the bottom plate, a pressing sheet is connected to one side of the pressure block along the length direction of the bottom plate, and the lower part of the pressing sheet is higher than the lower part of the pressing sheet. The utility model can be attached to the surface of the fabric by arranging the pressing sheet, and when the sewn fabric passes through the pressing sheet, the surface of the fabric can be flattened by the pressing sheet to prevent the fabric from stretching and arching.

Description

Technical Field

[0001] The utility model relates to the technical field of interlock sewing machines, and more specifically to a presser foot of interlock sewing machines. Background Art

[0002] The interlock sewing machine is also called a special sewing machine. The stitches it sews are chain stitches. This stitch is mostly used for sleeve seams and shoulder seams of knitted garments, crotch seams and front placket seams of close-fitting trousers. The presser foot is an indispensable part of the interlock sewing machine. It is used to press down the fabric to be sewn. Its quality directly affects the sewing quality.

[0003] The existing presser foot of the interlock sewing machine has shortcomings. When sewing some loose, soft, and elastic fabrics, there will be a phenomenon of stretching and arching at the sewing area after sewing, causing the fabric to form wavy wrinkles after the sewing thread passes through the presser foot, that is, stretching and arching, thereby affecting the sewing quality. Therefore, it is urgently necessary to improve this. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the above-mentioned prior art and provide a presser foot for a stretch sewing machine, which can be attached to the surface of a fabric by arranging a pressing plate. When the sewn fabric passes through the pressing plate, the surface of the fabric can be flattened by the pressing plate to prevent the fabric from stretching and arching.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a presser foot for a stretch sewing machine, comprising a bottom plate, a avoidance groove being provided at the lower part of the bottom plate, a pressure block being provided in the avoidance groove, the pressure block being able to move up and down in the avoidance groove, when the pressure block is located at the lowest position, the lower part of the pressure block is lower than the lower part of the bottom plate, a pressure sheet is connected to one side of the pressure block along the length direction of the bottom plate, and the lower part of the pressure sheet is higher than the lower part of the pressure block.

[0007] Furthermore, a column is provided at the upper part of the base plate, a first guide groove is provided inside the column, a guide column is provided at the upper part of the pressure block, the guide column is inserted into the first guide groove, a spring is provided in the first guide groove, the upper end of the spring abuts against the upper surface of the first guide groove and the lower end abuts against the upper part of the guide column, and the guide column can move up and down in the first guide groove.

[0008] Furthermore, the pressing block is connected to the base plate via a connecting piece, which is a first connecting piece. The first connecting piece passes through the pressing block and the first guide groove from bottom to top and is inserted into the column. The first connecting piece is threadedly connected to the column. The pressing block can move up and down along the first connecting piece. The lower end of the first connecting piece is embedded in the pressing block, and the spring is sleeved on the outside of the first connecting piece.

[0009] Furthermore, the pressing block is connected to the base plate via a connecting piece, which is a second connecting piece. A limiting groove is provided on the side wall of the column, which is connected to the first guide groove. A second connecting piece is fixed to the side of the guide column, and the second connecting piece is at least partially located in the limiting groove. The second connecting piece can move up and down along the limiting groove.

[0010] Furthermore, the pressing sheet is arranged to be inclined upward, and the connection between the pressing sheet and the pressing block is the lowest point.

[0011] Furthermore, a boss is provided on one side of the pressing block toward the pressing sheet, the boss is located above the pressing sheet, a third connecting member is connected to the inner thread of the boss, the lower end of the third connecting member abuts against the upper surface of the pressing sheet, and the third connecting member can move up and down to adjust the inclination angle of the pressing sheet.

[0012] Furthermore, two spring sheets are connected to the lower part of the bottom plate, and the bottom plate includes a notch, which is arranged on a side of the bottom plate away from the pressing sheet, and the two spring sheets are respectively located on both sides of the notch.

[0013] Furthermore, the area of ​​the spring sheet located at the bottom of the bottom plate is gap-matched with the lower surface of the bottom plate.

[0014] Furthermore, a protrusion is provided on the side of the bottom plate away from the pressing plate, and the protrusion is located on both sides of the notch. A first bending piece and a second bending piece are respectively provided at both ends of the spring sheet. The first bending piece is wrapped on the surface of the protrusion, and the second bending piece is wrapped on the side of the bottom plate facing the pressing plate.

[0015] Furthermore, the spring sheet is connected to the base plate via a fourth connecting piece, the two spring sheets can approach or move away from each other, a second guide groove is provided on the surface of the first bending sheet, a third guide groove is provided on the surface of the second bending sheet, the fourth connecting piece located at the second guide groove can penetrate the second guide groove and be inserted into the protrusion for fixing, and the fourth connecting piece located at the third guide groove can penetrate the third guide groove and be inserted into the base plate.

[0016] The beneficial effects of the utility model are:

[0017] When the pressing plate is set, after the fabric passes through the pressing block and is flattened for the first time, the pressing plate will also be pressed on the surface of the fabric, which is equivalent to flattening the fabric again, so that the sewn fabric can stretch out after passing through the pressing plate and will not arch, thereby greatly improving the sewing effect of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of this embodiment at a first viewing angle;

[0019] Figure 2 is a schematic diagram of the structure of this embodiment at a second viewing angle;

[0020] Figure 3 is a sectional view of the main view of this embodiment;

[0021] Figure 4 It is a partial cross-sectional view of this embodiment.

[0022] Figure numerals: 1, bottom plate; 11, notch; 12, avoidance groove; 13, column; 14, first guide groove; 15, limit groove; 16, protrusion; 2, pressure block; 21, guide column; 22, boss; 3, pressure plate; 4, first connecting member; 5, spring; 6, second connecting member; 7, spring sheet; 71, first bending piece; 72, second bending piece; 73, second guide groove; 74, third guide groove; 8, third connecting member; 9, fourth connecting member. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 4 As shown, a presser foot for a flat sewing machine comprises a bottom plate 1, a avoidance groove 12 is provided at the lower part of the bottom plate 1, a pressing block 2 is provided in the avoidance groove 12, a pressing sheet 3 is connected to the pressing block 2 on one side along the length direction of the bottom plate 1, the pressing sheet 3 and the pressing block 2 are fixed by welding, the bottom plate 1 comprises a notch 11, the notch 11 is provided on the side of the bottom plate 1 away from the pressing sheet 3, the notch 11 is an avoidance area for a suture (not shown in the figure), the suture is located in the notch 11 and the width of the suture is smaller than the width of the notch 11;

[0025] In practice, when sewing some loose, soft, and elastic fabrics, if the pressing plate 3 is not provided, and the fabric is only pressed by the pressing block 2, when the fabric is sewn from left to right, the sewn fabric will stretch and arch after passing through the pressing block 2, affecting the sewing effect; when the pressing plate 3 is provided, after the fabric passes through the pressing block 2 and is flattened for the first time, the pressing plate 3 will also be pressed on the surface of the fabric, which is equivalent to flattening the fabric again, so that the sewn fabric can stretch after passing through the pressing plate 3 and will not arch, thereby greatly improving the sewing effect of the fabric.

[0026] Among them, the lower part of the pressing sheet 3 is higher than the lower part of the pressing block 2, and the pressing sheet 3 is arranged to be inclined upward. The connection between the pressing sheet 3 and the pressing block 2 is the lowest point. The pressing sheet 3 is arranged to be higher than the pressing block 2, so that the pressing sheet 3 only needs to flatten the surface of the material without pressing the material tightly, thereby facilitating the transmission of the material. Setting the pressing sheet 3 to be inclined can also further facilitate the transmission of the material.

[0027] The pressing block 2 is provided with a boss 22 on one side facing the pressing sheet 3, and the boss 22 is located above the pressing sheet 3. The boss 22 is internally threadedly connected with a third connecting member 8, and the third connecting member 8 is a screw. The lower end of the third connecting member 8 abuts against the upper surface of the pressing sheet 3. The third connecting member 8 can move up and down to adjust the inclination angle of the pressing sheet 3. The pressing sheet 3 is a metal sheet structure. By twisting the third connecting member 8, the pressing sheet 3 can be pushed to deform, thereby adjusting the angle of the pressing sheet 3 to facilitate the transmission of different fabrics.

[0028] The pressing block 2 can move up and down in the avoidance groove 12. When the pressing block 2 is at the lowest position, the lower part of the pressing block 2 is lower than the lower part of the bottom plate 1. Specifically, a column 13 is provided on the upper part of the bottom plate 1, and a first guide groove 14 is provided inside the column 13. A guide column 21 is provided on the upper part of the pressing block 2. The guide column 21 is inserted into the first guide groove 14. A spring 5 is provided in the first guide groove 14. The upper end of the spring 5 abuts against the upper surface of the first guide groove 14 and the lower end abuts against the upper part of the guide column 21. The guide column 21 can move up and down in the first guide groove 14. The pressing block 2 and the bottom plate 1 are connected by The connecting piece is connected by a connecting piece, the connecting piece is a second connecting piece 6, the side wall of the column 13 is provided with a limiting groove 15, the limiting groove 15 is communicated with the first guide groove 14, the side of the guide column 21 is fixed with a second connecting piece 6, the second connecting piece 6 is at least partially located in the limiting groove 15, the second connecting piece 6 can move up and down along the limiting groove 15, the second connecting piece 6 is a screw, and the up and down movement of the pressing block 2 can be realized through the cooperation of the second connecting piece 6, the guide column 21, the limiting groove 15 and the spring 5, which not only enables the pressing block 2 to better press the fabric, but also prevents excessive pressure from affecting the transmission of the fabric.

[0029] The pressing block 2 and the column 13 can also be connected through the first connecting member 4. The first connecting member 4 penetrates the pressing block 2 and the first guide groove 14 from bottom to top and is inserted into the column 13. The first connecting member 4 is connected to the column 13 through a threaded connection. The pressing block 2 can move up and down along the first connecting member 4. The lower end of the first connecting member 4 is embedded in the pressing block 2. The spring 5 is sleeved on the outside of the first connecting member 4. The first connecting member 4 is a bolt. By setting the first connecting member 4, the initial height of the pressing block 2 can be adjusted to meet the sewing requirements of fabrics of different thicknesses, and the application range is wide.

[0030] Two spring sheets 7 are connected to the lower part of the bottom plate 1, and the two spring sheets 7 are respectively located on both sides of the notch 11. The area of ​​the spring sheet 7 located at the lower part of the bottom plate 1 is gap-matched with the lower surface of the bottom plate 1. The spring sheet 7 is a metal sheet. A protrusion 16 is provided on the side of the bottom plate 1 away from the pressing sheet 3, and the protrusion 16 is located on both sides of the notch 11. The two ends of the spring sheet 7 are respectively provided with a first bending sheet 71 and a second bending sheet 72, the first bending sheet 71 is wrapped around the surface of the protrusion 16, and the second bending sheet 72 is wrapped around the side of the bottom plate 1 facing the pressing sheet 3. The spring sheet 7 is connected to the bottom plate 1 through a fourth connecting member 9, and the two spring sheets 7 can approach or move away from each other. A second guide groove 73 is provided on the surface of the first bending sheet 71, and a third guide groove 74 is provided on the surface of the second bending sheet 72. The fourth connecting member 9 located at the second guide groove 73 can penetrate the second guide groove 73 and be inserted into the protrusion 16 for fixing, and the fourth connecting member 9 located at the third guide groove 74 can penetrate the third guide groove 74 and be inserted into the bottom plate 1;

[0031] The fourth connecting member 9 is a screw. When sewing the fabric, the lower part of the spring piece 7 abuts against the surface of the fabric. By providing two spring pieces 7 that can adjust the relative positions, the width of the seam avoidance zone can be adjusted. When the seam width is narrow, the two spring pieces 7 can be brought close to each other so that the spring piece 7 can be as close to the edge of the seam edge of the fabric as possible, which is convenient for flattening the fabric on both sides of the seam, and is beneficial to improving the sewing effect of the fabric.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A presser foot for a flat sewing machine, characterized in that: The invention comprises a bottom plate (1), wherein a relief groove (12) is provided at the bottom of the bottom plate (1), a pressing block (2) is provided in the relief groove (12), and the pressing block (2) can move up and down in the relief groove (12); when the pressing block (2) is at the lowest position, the lower part of the pressing block (2) is lower than the lower part of the bottom plate (1); a pressing sheet (3) is connected to one side of the pressing block (2) along the length direction of the bottom plate (1), and the lower part of the pressing sheet (3) is higher than the lower part of the pressing block (2).

2. A presser foot for a flat sewing machine according to claim 1, characterized in that: A column (13) is provided on the upper part of the base plate (1), a first guide groove (14) is provided inside the column (13), a guide column (21) is provided on the upper part of the pressing block (2), the guide column (21) is inserted into the first guide groove (14), a spring (5) is provided in the first guide groove (14), the upper end of the spring (5) abuts against the upper surface of the first guide groove (14) and the lower end abuts against the upper part of the guide column (21), and the guide column (21) can move up and down in the first guide groove (14).

3. A presser foot for a flat sewing machine according to claim 2, characterized in that: The pressing block (2) is connected to the base plate (1) via a connecting piece, wherein the connecting piece is a first connecting piece (4). The first connecting piece (4) penetrates the pressing block (2) and the first guide groove (14) from bottom to top and is inserted into the column (13). The first connecting piece (4) is connected to the column (13) via a thread. The pressing block (2) can move up and down along the first connecting piece (4). The lower end of the first connecting piece (4) is embedded in the pressing block (2). The spring (5) is sleeved on the outside of the first connecting piece (4).

4. The presser foot of a flat sewing machine according to claim 2, characterized in that: The pressing block (2) is connected to the bottom plate (1) via a connecting piece, wherein the connecting piece is a second connecting piece (6). A limiting groove (15) is provided on the side wall of the column (13), wherein the limiting groove (15) is communicated with the first guide groove (14). A second connecting piece (6) is fixed to the side of the guide column (21), wherein the second connecting piece (6) is at least partially located in the limiting groove (15), and the second connecting piece (6) can move up and down along the limiting groove (15).

5. The presser foot of a flat sewing machine according to claim 1, characterized in that: The pressing sheet (3) is arranged to be inclined upward, and the connection between the pressing sheet (3) and the pressing block (2) is the lowest point.

6. The presser foot of a flat sewing machine according to claim 1, characterized in that: The pressing block (2) is provided with a boss (22) on one side facing the pressing sheet (3); the boss (22) is located above the pressing sheet (3); the boss (22) is internally threadedly connected to a third connecting member (8); the lower end of the third connecting member (8) abuts against the upper surface of the pressing sheet (3); the third connecting member (8) can move up and down to adjust the inclination angle of the pressing sheet (3).

7. The presser foot of a flat sewing machine according to claim 1, characterized in that: Two spring sheets (7) are connected to the lower part of the bottom plate (1), and the bottom plate (1) comprises a notch (11). The notch (11) is arranged on a side of the bottom plate (1) away from the pressing sheet (3), and the two spring sheets (7) are respectively located on both sides of the notch (11).

8. A presser foot for a flat sewing machine according to claim 7, characterized in that: The area of ​​the spring sheet (7) located at the bottom of the bottom plate (1) is clearance-matched with the lower surface of the bottom plate (1).

9. The presser foot of a flat sewing machine according to claim 7, characterized in that: A protrusion (16) is provided on the side of the bottom plate (1) away from the pressing plate (3), and the protrusion (16) is located on both sides of the notch (11). A first bending piece (71) and a second bending piece (72) are respectively provided at both ends of the spring sheet (7), and the first bending piece (71) is wrapped around the surface of the protrusion (16), and the second bending piece (72) is wrapped around the side of the bottom plate (1) facing the pressing plate (3).

10. A presser foot for a flat sewing machine according to claim 9, characterized in that: The spring sheet (7) is connected to the bottom plate (1) via a fourth connecting piece (9); the two spring sheets (7) can move closer to or farther from each other; a second guide groove (73) is provided on the surface of the first bending sheet (71); a third guide groove (74) is provided on the surface of the second bending sheet (72); the fourth connecting piece (9) located at the second guide groove (73) can penetrate the second guide groove (73) and be inserted into the protrusion (16) for fixing; and the fourth connecting piece (9) located at the third guide groove (74) can penetrate the third guide groove (74) and be inserted into the bottom plate (1).

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