Sewing machine for cloth edge covering

Abstract

The utility model provides a sewing machine for cloth hemming. The sewing machine for cloth hemming comprises a sewing machine body, a hemming folder and an adjusting blocking piece. The hemming folder is correspondingly arranged on a table plate of the sewing machine, the discharging end of the hemming folder corresponds to a presser foot of the sewing machine, the adjusting blocking piece is arranged on the table plate of the sewing machine corresponding to a discharging port of the hemming folder, and the end, close to the presser foot of the sewing machine, of the adjusting blocking piece is located at the front end of a feeding tooth of the sewing machine. And the lower surface of the hemming cloth strip discharged from the folder can be propped against the lower surface of the hemming cloth strip, so that the forward resistance of the lower-layer cloth of the hemming cloth strip is increased. According to the utility model, the friction force of the lower-layer cloth is increased by adopting the contact between the adjusting separation blade and the lower surface of the cloth strip, so that the synchronism of the upper-layer cloth and the lower-layer cloth in the sewing process is ensured, the wrinkling or loosening phenomenon is greatly reduced, and the stability and the consistency of edge covering are improved.

Description

Technical Field

[0001] The utility model relates to the field of clothing hemming, in particular to a sewing machine for hemming fabrics. Background Art

[0002] Fabric hemming is one of the main tasks of a sewing machine. After the hemming device folds the fabric strip, the sewing machine sews the fabric strip to the fabric. The hemming process is very common in garment production. However, during the hemming operation, it is generally difficult for ordinary workers to make the finished product exactly the same as the technician's sample at once. Especially for elastic fabrics, only skilled workers can barely complete the process, and it cannot be guaranteed that each finished product is exactly the same as the technician's sample. This not only results in a low yield rate but also uneven quality.

[0003] The prior art CN202321913212.X discloses a hemming machine with fabric strip guiding, including a hemming machine. A mounting seat is horizontally arranged on the top of the workbench surface of the hemming machine. A pulling cylinder is horizontally arranged on the top of the mounting seat. A pressing groove mechanism is horizontally arranged on the side of the pulling cylinder away from the upper head of the hemming machine. The pressing groove mechanism includes a groove body horizontally arranged on one side of the pulling cylinder, a pressing rod vertically arranged inside the groove body, sliders vertically arranged at the top and bottom of the pressing rod, and an adjusting bolt threadedly connected to the front of the groove body. Although this utility model can prevent the fabric strip from wrinkling during transmission in the pulling cylinder, there are still the following problems:

[0004] 1. When the folded fabric for hemming enters below the sewing needle in the existing hemming device, due to the different frictions between the feed dog and the presser foot and the fabric, when the hemming fabric enters below the stitch, it is easy to cause a speed difference between the upper and lower sides of the folded hemming fabric during sewing, resulting in wrinkles in the hemming and affecting the product quality.

[0005] 2. The existing hemming devices in the prior art have poor adaptability to fabrics of different thicknesses or elasticities. When dealing with elastic fabrics or when the fabric thickness changes, if the tension of the hemming device is not properly controlled, it may cause the fabric to deform due to over-tight hemming, or the hemming effect may be poor or even the thread may come off due to over-looseness. Summary of the Utility Model

[0006] In view of this, the purpose of the present utility model is to provide a sewing machine for hemming fabrics. By using an adjusting flap to contact the lower surface of the fabric strip to increase the friction of the lower-layer fabric, the synchronism of the upper and lower-layer fabrics during sewing is ensured, greatly reducing the phenomena of wrinkles or slack, and improving the stability and consistency of hemming.

[0007] The technical solution adopted by the present utility model to solve its technical problems is:

[0008] Provided is a sewing machine for hemming fabrics, including: a sewing machine, a hemming attachment, and an adjusting flap; the hemming attachment is correspondingly arranged on the table board of the sewing machine, and its discharge end is correspondingly arranged opposite to the presser foot of the sewing machine.

[0009] The adjusting flap is arranged on the table board of the sewing machine corresponding to the discharge port of the hemming attachment, and one end thereof close to the presser foot of the sewing machine is located at the front end of the feed dog of the sewing machine, and can abut against the lower surface of the hemmed fabric strip coming out of the attachment, increasing the forward resistance of the lower layer fabric of the hemmed fabric strip.

[0010] It should be noted that the lower layer fabric refers to the fabric layer that is below after the hemmed fabric strip is folded, and the hemming attachment adopts the hemming attachment disclosed in the prior art, such as the mechanisms disclosed in CN202323144828.8 and CN202322866500.0. In this solution, by arranging the adjusting flap near the discharge port of the hemming attachment, corresponding to the positions of the presser foot and the feed dog of the sewing machine, when the hemmed fabric strip comes out of the attachment, the adjusting flap contacts the lower surface of the fabric strip, and by increasing the friction force, the forward speed of the lower layer fabric of the fabric strip is controlled, ensuring the synchronism of the upper and lower layer fabrics during the sewing process, reducing the wrinkles or slack caused by the speed difference, and improving the stability and consistency of hemming.

[0011] Preferably, the adjusting flap includes a positioning piece and a strip-shaped limiting piece. The positioning piece is adjustably arranged on the table board through an adjusting device. One end of the strip-shaped limiting piece is arranged on the positioning piece, and the other end abuts against the lower surface of the lower layer fabric, and the position of the positioning piece can be adjusted through the adjusting device to control the position where the strip-shaped limiting piece abuts against the lower layer fabric.

[0012] It should be noted that the adjusting flap can move along the waist-shaped hole or track on the table board through the adjusting device, which enables the operator to adjust the position of the positioning piece according to the characteristics of the specific fabric (such as thickness, elasticity, etc.) and the sewing requirements, thereby changing the contact degree between the strip-shaped limiting piece and the lower layer fabric. This adjustability is the key to ensuring that the equipment can handle different fabric types, thus improving the hemming quality.

[0013] Preferably, the adjusting device is an adjusting bolt. The positioning piece is provided with a waist-shaped hole. The positioning piece is fixed on the table board of the sewing machine through the cooperation of the adjusting bolt and the waist-shaped hole, and the position of the positioning piece is adjusted by moving the relative position of the waist-shaped hole and the adjusting bolt.

[0014] It should be noted that the cooperation mode between the adjusting bolt and the waist-shaped hole is a common mechanical adjustment means, which allows the positioning piece to move within a certain range, so as to adjust the contact force and position between the strip-shaped limiting piece and the lower-layer fabric. When the operator needs to adjust the contact degree between the strip-shaped limiting piece and the lower-layer fabric, only need to loosen the adjusting bolt, move the positioning piece along the direction of the waist-shaped hole until the ideal position is reached, and then tighten the adjusting bolt again to fix the positioning piece, then it can be easily adjusted to meet the edge-binding requirements of different fabrics, ensure the stable feeding speed of the fabric during the edge-binding process, and reduce wrinkles and deformation.

[0015] Preferably, scale bars are correspondingly arranged on both sides of the waist-shaped hole.

[0016] It should be noted that the scale bar, as a visual reference, helps the operator to quantitatively judge the moving distance when adjusting the position of the positioning piece, ensuring that each adjustment can achieve the expected effect; through the scale bar, the operator can more precisely control the position of the adjusting piece, and then accurately adjust the contact degree between the strip-shaped limiting piece and the lower-layer fabric.

[0017] Preferably, the edge of the waist-shaped hole is stepped, the nut of the adjusting bolt is locked on the lower step of the waist-shaped hole, and its upper end is not higher than the upper surface of the positioning piece.

[0018] It should be noted that the stepped design can make the nut of the adjusting bolt better locked in the waist-shaped hole. The upper end of the adjusting bolt is not higher than the upper surface of the positioning piece, which can avoid scratching the fabric or the operator's hand by the protruding part of the bolt during the operation, and reduce the safety risk during the production process.

[0019] Preferably, it further includes a tensioning roller and a cloth roll holder. The cloth roll holder is arranged on the table board of the sewing machine, and a cloth strip roll is placed thereon. The tensioning roller is arranged between the cloth roll holder and the edge-binding cylinder and can clamp the cloth strip to keep the cloth strip between the edge-binding cylinder and the tensioning roller taut.

[0020] It should be noted that the tensioning roller not only provides tension, but also guides the cloth strip to smoothly transition from the cloth roll holder to the edge-binding cylinder, ensuring the straightness and stability of the cloth strip during the conveying process, preventing the cloth strip from becoming slack or wrinkled before being fed into the edge-binding cylinder. The cloth roll holder ensures the stable placement of the cloth strip roll, avoiding the shaking or displacement of the cloth roll during the edge-binding process, and further ensuring the smooth supply of the cloth strip.

[0021] Preferably, the tensioning roller includes a fixed seat and two clamping rollers. The clamping rollers are oppositely arranged on the fixed seat and can clamp the cloth strip.

[0022] It should be noted that the two clamping rollers are arranged oppositely and apply appropriate pressure to clamp the cloth strip, which not only ensures that the cloth strip remains taut during transmission, preventing slack or wrinkles; but also helps the cloth strip to move in a straight line, reducing skew, ensuring accurate alignment when the cloth strip enters the edge wrapping cylinder, and improving the accuracy and consistency of edge wrapping.

[0023] Preferably, one of the clamping rollers is movably arranged on the fixed seat, and the distance between the two clamping rollers can be controlled by adjusting the position of the clamping roller.

[0024] It should be noted that the operator can adjust the distance between the two clamping rollers according to the thickness of the fabric, so as to ensure that the cloth strip can obtain appropriate clamping force when passing through the tensioning roller. By precisely controlling the state of the cloth strip before edge wrapping, the accuracy and consistency of edge wrapping can be significantly improved, reducing defects caused by fabric fluctuations, thereby enhancing the appearance and structural quality of the finished product.

[0025] Advantages of the present utility model:

[0026] A sewing machine for edge wrapping fabrics provided by the present utility model increases the friction of the lower layer of fabric by adjusting the baffle, ensuring the synchronism of the upper and lower layers of fabric during sewing, greatly reducing wrinkles or slack, improving the stability and consistency of edge wrapping, and making the edge wrapping effect more uniform and beautiful; the adjustable baffle enables the equipment to adapt to fabrics of different thicknesses and elasticities, and the operator can adjust the contact degree between the strip-shaped limiting piece and the lower layer of fabric according to the fabric characteristics, thereby improving the edge wrapping quality and being applicable to more types of fabrics; the stepped design at the edge of the kidney-shaped hole and the low-profile treatment of the adjusting bolt avoid potential safety hazards during production, protect the operator from injury, and also avoid accidental damage to the fabric. Description of the drawings

[0027] Figure 1 It is a three-dimensional schematic diagram of a sewing machine for edge wrapping fabrics according to Embodiment 1 of the present utility model.

[0028] Figure 2 It is Figure 1 an enlarged schematic diagram of part A.

[0029] Figure 3 It is a schematic diagram of the structure of the adjusting baffle according to Embodiment 1 of the present utility model.

[0030] Figure 4 It is a three-dimensional schematic diagram of a sewing machine for edge wrapping fabrics according to Embodiment 2 of the present utility model.

[0031] Figure 5 It is a schematic diagram of the structure of the tensioning roller according to Embodiment 2 of the present utility model.

[0032] In the figure: 1, sewing machine; 11, table board; 12, feed dog; 2, edge binding cylinder; 3, adjusting baffle; 31, positioning piece; 311, kidney-shaped hole; 312, scale bar; 32, strip-shaped limiting piece; 4, adjusting device; 41, adjusting bolt; 5, tensioning roller; 51, fixing seat; 52, clamping roller; 6, cloth roll holder; 7, cloth strip roll.

[0033] It should be noted that these drawings and text descriptions do not in any way limit the scope of the concept of the present utility model, but illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] Embodiment 1

[0036] As Figures 1-3 shown, a sewing machine for binding the edge of a fabric includes: a sewing machine 1, an edge binding cylinder 2, and an adjusting baffle 3; the edge binding cylinder 2 is correspondingly arranged on the table board 11 of the sewing machine 1, and its discharge end is correspondingly arranged opposite to the presser foot of the sewing machine 1.

[0037] The adjusting baffle 3 is arranged on the table board 11 of the sewing machine 1 corresponding to the discharge port of the edge binding cylinder 2, and one end thereof close to the presser foot of the sewing machine 1 is located at the front end of the feed dog 12 of the sewing machine 1, and can abut against the lower surface of the edge binding cloth strip coming out of the cylinder, increasing the forward resistance of the lower layer of the edge binding cloth strip.

[0038] The adjusting baffle 3 includes a positioning piece 31 and a strip-shaped limiting piece 32. The positioning piece 31 is adjustably arranged on the table board 11 through an adjusting device 4. One end of the strip-shaped limiting piece 32 is arranged on the positioning piece 31, and the other end abuts against the lower surface of the lower layer of the cloth, and the position of the strip-shaped limiting piece 32 abutting against the lower layer of the cloth can be controlled by adjusting the position of the positioning piece 31 through the adjusting device 4.

[0039] The adjusting device 4 is an adjusting bolt 41. The positioning piece 31 is provided with a kidney-shaped hole 311. The positioning piece 31 is fixed on the table board 11 of the sewing machine 1 through the cooperation of the adjusting bolt 41 and the kidney-shaped hole 311, and the position of the positioning piece 31 is adjusted by moving the relative position of the kidney-shaped hole 311 and the adjusting bolt 41.

[0040] Scale bars 312 are correspondingly arranged on both sides of the kidney-shaped hole 311.

[0041] The edge of the kidney-shaped hole 311 is stepped, and the nut of the adjusting bolt 41 is locked on the lower step of the kidney-shaped hole 311, and its upper end is not higher than the upper surface of the positioning piece 31.

[0042] The working principle and usage method of a sewing machine for hemming fabrics in this embodiment:

[0043] A sewing machine for hemming fabrics provided in this embodiment increases the forward resistance of the lower-layer fabric to ensure the synchronism of the upper and lower-layer fabrics during sewing, so as to reduce wrinkles or slack, and improve the stability and consistency of hemming; the hemming cylinder 2 is located on the table board 11 of the sewing machine 1, and its discharge end faces the presser foot of the sewing machine 1 to ensure that the cloth strip can smoothly enter under the presser foot for sewing; the adjusting flap 3 is arranged near the discharge port of the hemming cylinder 2. By contacting the lower surface of the fabric, the adjusting flap 3 increases the forward resistance of the fabric, which helps to maintain the synchronous movement of the upper and lower-layer fabrics and reduce wrinkles; the combination of the kidney-shaped hole 311 on the positioning piece 31 and the adjusting bolt 41 allows the positioning piece 31 to move within a certain range, so as to adjust the contact degree between the strip-shaped limiting piece 32 and the lower-layer fabric. The operator can adjust the position of the strip-shaped limiting piece 32 according to the characteristics of the fabric (such as thickness, elasticity) to ensure appropriate friction and improve the hemming quality; the scale bars 312 on both sides of the kidney-shaped hole 311 provide a method of quantitative adjustment, which helps the operator to intuitively judge how much distance has been moved when adjusting the position of the positioning piece 31 to ensure that each adjustment can achieve the expected effect; the design that the adjusting bolt 41 is not higher than the upper surface of the positioning piece 31 can avoid the possible damage to the fabric or the operator caused by the protruding part of the bolt during operation, and reduce the safety hazards in the production process.

[0044] During use, first correctly install components such as the sewing machine 1, the hemming cylinder 2, and the adjusting flap 3 on the table board 11 to ensure that the discharge end of the hemming cylinder 2 is aligned with the presser foot of the sewing machine 1 and the position of the adjusting flap 3 is correct; then, according to the characteristics of the fabric to be processed, loosen the adjusting bolt 41 and adjust the position of the positioning piece 31 along the kidney-shaped hole 311 until the contact force and position between the strip-shaped limiting piece 32 and the lower-layer fabric meet the requirements, and use the scale bar 312 as a reference to ensure the accuracy of the adjustment; then prepare the fabric, start the sewing machine 1, observe the hemming effect, and if necessary, finely adjust the position of the adjusting flap 3 to achieve the best hemming effect; during the hemming process, continuously monitor the hemming effect and adjust the position of the adjusting flap 3 in a timely manner according to the actual situation to ensure the stability and consistency of hemming.

[0045] Embodiment 2

[0046] Such as Figure 4 And Figure 5As shown in the figure, a sewing machine for hemming fabrics in this embodiment includes: a sewing machine 1, a hemming cylinder 2, and an adjusting flap 3; the hemming cylinder 2 is correspondingly arranged on the table board 11 of the sewing machine 1, and its discharge end is correspondingly arranged opposite to the presser foot of the sewing machine 1.

[0047] The adjusting flap 3 is arranged on the table board 11 of the sewing machine 1 corresponding to the discharge port of the hemming cylinder 2, and one end thereof close to the presser foot of the sewing machine 1 is located at the front end of the feed dog 12 of the sewing machine 1, and can abut against the lower surface of the hemmed fabric strip coming out of the cylinder, increasing the forward resistance of the lower layer fabric of the hemmed fabric strip.

[0048] The adjusting flap 3 includes a positioning piece 31 and a strip-shaped limiting piece 32. The positioning piece 31 is adjustably arranged on the table board 11 through an adjusting device 4. One end of the strip-shaped limiting piece 32 is arranged on the positioning piece 31, and the other end abuts against the lower surface of the lower layer fabric, and the position of the positioning piece 31 can be adjusted through the adjusting device 4 to control the position where the strip-shaped limiting piece 32 abuts against the lower layer fabric.

[0049] The adjusting device 4 is an adjusting bolt 41. The positioning piece 31 is provided with a waist-shaped hole 311. The positioning piece 31 is fixed on the table board 11 of the sewing machine 1 through the cooperation of the adjusting bolt 41 and the waist-shaped hole 311, and the position of the positioning piece 31 is adjusted by moving the relative position of the waist-shaped hole 311 and the adjusting bolt 41.

[0050] Scale bars 312 are correspondingly arranged on both sides of the waist-shaped hole 311.

[0051] The edge of the waist-shaped hole 311 is stepped. The nut of the adjusting bolt 41 is locked on the lower step of the waist-shaped hole 311, and its upper end is not higher than the upper surface of the positioning piece 31.

[0052] It further includes a tensioning roller 5 and a cloth roll holder 6. The cloth roll holder 6 is arranged on the table board 11 of the sewing machine 1, on which a fabric strip roll 7 is placed. The tensioning roller 5 is arranged between the cloth roll holder 6 and the hemming cylinder 2, and can clamp the fabric strip to keep the fabric strip between the hemming cylinder 2 and the tensioning roller 5 taut.

[0053] The tensioning roller 5 includes a fixed seat 51 and two clamping rollers 52. The clamping rollers 52 are oppositely arranged on the fixed seat 51 and can clamp the fabric strip.

[0054] One of the clamping rollers 52 is movably arranged on the fixed seat 51, and the distance between the two clamping rollers 52 can be controlled by adjusting the position of the clamping roller 52.

[0055] The working principle and usage method of a sewing machine for hemming fabrics in this embodiment:

[0056] A sewing machine for hemming fabrics provided in this embodiment adds the configurations of a tensioning roller 5 and a fabric roll holder 6 on the basis of Embodiment 1. The fabric roll holder 6 is used to stably place the fabric strip roll 7 to ensure the smooth supply of the fabric strip during the hemming process, avoid affecting the hemming quality due to the shaking or displacement of the fabric roll, and use the tensioning roller 5 to provide appropriate tension for the fabric strip during the process from the fabric roll holder 6 to the hemming cylinder 2, ensuring that the fabric strip is in a taut state before entering the hemming cylinder 2 to prevent slack or wrinkles; it helps to improve the straightness and stability of the hemming; and by adjusting the distance between the clamping rollers 52, the operator can ensure that the fabric strip obtains an appropriate clamping force when passing through the tensioning roller 5 according to the thickness and elasticity of the fabric, avoiding hemming quality problems caused by being too tight or too loose.

[0057] When in use, first correctly install components such as the sewing machine 1, the hemming cylinder 2, the adjusting flap 3, the tensioning roller 5, and the fabric roll holder 6 on the table board 11, ensure that each component is aligned and fixed, and then according to the fabric characteristics (such as thickness, elasticity), by loosening the adjusting bolt 41, adjust the position of the positioning piece 31 along the waist-shaped hole 311 until the force and position where the strip-shaped limiting piece 32 contacts the lower-layer fabric meet the requirements, using the scale bar 312 as a reference. Then adjust the distance between the clamping rollers 52 to adapt to the thickness of the fabric strip, ensure that the fabric strip maintains an appropriate tension when passing through the tensioning roller 5, and avoid slack; place the fabric strip roll 7 on the fabric roll holder 6, make the hemming fabric strip pass through the tensioning roller 5 and the hemming cylinder 2 in sequence, start the sewing machine 1, and start the hemming operation. Pay attention to observing the hemming effect and, if necessary, finely adjust the settings of the adjusting flap 3 and the tensioning roller 5.

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0060] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A sewing machine for hemming cloth, comprising: Sewing machine (1), hemming pull cylinder (2), and adjusting baffle (3); The hemming pull tube (2) is arranged correspondingly on the table (11) of the sewing machine (1), and its discharge end is arranged correspondingly to the presser foot of the sewing machine (1), and is characterized in that: The adjusting baffle (3) is arranged on the table (11) of the sewing machine (1) corresponding to the discharge port of the hemming pull tube (2), and the end thereof close to the presser foot of the sewing machine (1) is located at the front end of the feed tooth (12) of the sewing machine (1), and can abut against the lower surface of the hemming cloth strip coming out of the pull tube, thereby increasing the forward resistance of the lower layer of the hemming cloth strip.

2. A sewing machine for fabric hemming as claimed in claim 1, characterized in that: The adjusting baffle (3) comprises a positioning piece (31) and a strip-shaped limiting piece (32); the positioning piece (31) is adjustably arranged on the table (11) by means of an adjusting device (4); one end of the strip-shaped limiting piece (32) is arranged on the positioning piece (31) and the other end is in contact with the lower surface of the lower layer of fabric; and the position of the positioning piece (31) can be adjusted by means of the adjusting device (4) to control the position at which the strip-shaped limiting piece (32) abuts against the lower layer of fabric.

3. A sewing machine for fabric hemming as claimed in claim 2, characterized in that: The adjusting device (4) is an adjusting bolt (41), a waist-shaped hole (311) is provided on the positioning piece (31), the positioning piece (31) is fixed on the table (11) of the sewing machine (1) through the cooperation between the adjusting bolt (41) and the waist-shaped hole (311), and the position of the positioning piece (31) is adjusted by moving the relative position of the waist-shaped hole (311) and the adjusting bolt (41).

4. A sewing machine for fabric hemming as claimed in claim 3, characterized in that: Scale bars (312) are correspondingly provided on both sides of the waist-shaped hole (311).

5. A sewing machine for fabric hemming as claimed in claim 3, characterized in that: The edge of the waist-shaped hole (311) is stepped, and the nut of the adjusting bolt (41) is locked on the lower step of the waist-shaped hole (311), and its upper end is not higher than the upper surface of the positioning piece (31).

6. A sewing machine for fabric hemming as claimed in claim 1, characterized in that: The invention also comprises a tensioning roller (5) and a cloth roll rack (6), wherein the cloth roll rack (6) is arranged on a table (11) of the sewing machine (1) and a cloth strip roll (7) is placed thereon, and the tensioning roller (5) is arranged between the cloth roll rack (6) and the edge binding pull cylinder (2) and is capable of clamping the cloth strip so that the cloth strip between the edge binding pull cylinder (2) and the tensioning roller (5) is kept taut.

7. A sewing machine for fabric hemming as claimed in claim 6, characterized in that: The tensioning roller (5) comprises a fixed seat (51) and two clamping rollers (52); the clamping rollers (52) are arranged relatively on the fixed seat (51) and are capable of clamping the cloth strips.

8. A sewing machine for fabric hemming as claimed in claim 7, characterized in that: One of the clamping rollers (52) is movably arranged on the fixed seat (51), and the distance between the two clamping rollers (52) can be controlled by adjusting the position of the clamping roller (52).

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