A hem sewing machine with a clothing stabilizing mechanism

Abstract

This utility model discloses a hem sewing machine with a garment stabilizing mechanism, including a worktable and a sewing machine head, a moving table assembly, and a garment support mechanism mounted on the worktable. The garment support mechanism includes a first rotating roller and a second rotating roller, which are respectively located on the front and rear sides of the sewing machine head. The second rotating roller is located on the rear side of the moving table assembly, and the first and second rotating rollers together form a garment-supporting area. The machine also includes a garment stabilizing mechanism, which includes an auxiliary pressure cylinder assembly corresponding to the garment-supporting area. The auxiliary pressure cylinder assembly is located between the first rotating roller and the table surface of the sewing machine head. The auxiliary pressure cylinder assembly includes a pressure cylinder frame mounted on a base and pressure rollers arranged on the left and right sides. The pressure cylinder frame is n-shaped, and pressure rollers are hinged to both ends of the frame. This utility model can ensure the flatness of the garment during sewing, avoid thread shifting, and provides high sewing precision and reliability.

Description

Technical Field

[0001] This utility model relates to the field of clothing sewing technology, and more specifically to a hem sewing machine with a clothing stabilizing mechanism. Background Technology

[0002] A hem sewing machine is an automated device specifically designed for folding and sewing the hems of garments (such as T-shirts, shirts, and trouser cuffs).

[0003] Traditional hem sewing machines typically use a presser foot to press down on the hem of garments to secure it and ensure even stitching. However, the needle can easily shift or become misaligned as the garment is fed to the machine head, leading to wrinkles, uneven folds, or misalignment. This results in uneven fabric and further misaligned stitches. To address this, some hem sewing machines on the market have a movable pressure plate around the needle on the machine head to hold the garment in place. While this type of pressure plate can ensure even stitching to some extent, direct contact with the fabric can leave indentations, especially on softer fabrics.

[0004] In view of this, this application has conducted in-depth research on this basis, resulting in this case. Utility Model Content

[0005] The purpose of this invention is to provide a hem sewing machine with a garment stabilizing mechanism that produces smooth garments, high sewing precision, and good reliability.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A hem sewing machine with a garment securing mechanism includes a worktable and a sewing machine head, a garment support mechanism, a moving table assembly, and a bobbin guide mechanism mounted on the worktable. The worktable's length direction is the front-to-back direction, and its width direction is the left-to-right direction. The garment support mechanism includes a first rotating roller and a second rotating roller that can slide in the front-to-back direction. The first and second rotating rollers are respectively located on the front and rear sides of the sewing machine head. The second rotating roller is located on the rear side of the moving table assembly. The first and second rotating rollers together form a garment opening area. The machine also includes a garment securing mechanism, which includes an auxiliary presser cylinder assembly and a pressing assembly corresponding to the opening area. The sewing machine presser foot on the sewing machine head corresponds to the opening area. The auxiliary pressure cylinder assembly is located between the first rotating roller and the sewing machine head table, and the pressing assembly is located on the upper rear side of the table of the moving table assembly. The auxiliary pressure cylinder assembly includes a pressure cylinder frame mounted on the base in a vertically movable manner and pressure rollers arranged horizontally. The pressure cylinder frame is n-shaped, and the two ends of the pressure cylinder frame are respectively hinged to the pressure rollers. The pressing assembly includes a pressing block, a pressing plate, and a torsion spring. The pressing block is indirectly mounted on the base in a vertically movable manner, and an n-shaped pressing cavity is formed on the lower side of the pressing block. The rear part of the pressing plate is hinged to the pressing cavity via a rotating shaft. The torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring respectively abut against the rear and upper sides of the pressing cavity.

[0008] The auxiliary pressure cylinder assembly also includes a pressure cylinder, the cylinder body of which is fixedly installed on the front side of the base, and the pressure cylinder is arranged vertically. The piston rod of the pressure cylinder is drivenly connected to the top of the pressure cylinder frame.

[0009] The presser frame includes an integrally connected straight section and two oppositely arranged arc-shaped sections. The piston rod of the presser cylinder is drivenly connected to the middle position of the straight section. Both arc-shaped sections are bent downwards from front to back. The two ends of the presser roller are respectively hinged to the rear ends of the corresponding arc-shaped sections. With the sewing machine head table as a reference, the rear ends of both arc-shaped sections are located at the lowest point of the presser frame.

[0010] The pressure roller is a cylindrical object made of silicone material.

[0011] The guide bone mechanism is located between the auxiliary pressure cylinder assembly and the sewing machine presser foot.

[0012] The guide bone mechanism includes a spool that can move left and right. The spool is arranged left and right, and an air vent is provided on the front side of the spool near the left end of the sewing machine head. An airflow channel is provided inside the spool in the left and right direction, and the airflow channel is connected to the air vent.

[0013] A guide bone mounting plate is installed on the lower side of the base. A guide bone slide rail is arranged on the lower side of the guide bone mounting plate in the left-right direction. A guide bone slider is slidably fitted on the guide bone slide rail. A guide bone connector is fixedly installed on the right end of the insert. The guide bone slider is connected to the insert through the guide bone connector.

[0014] The seat is equipped with a guide cylinder, which is arranged in the left-right direction, and the piston rod of the guide cylinder is connected to the guide slider.

[0015] A pressing connector is installed on the lower part of the rear side of the seat body, arranged in the front-to-back direction. An L-shaped pressing bracket is installed at the rear end of the pressing connector. A pressing cylinder is fixedly installed on the upper side of the pressing bracket. The pressing cylinder is arranged vertically, and the piston rod of the pressing cylinder is connected to the upper side of the pressing block.

[0016] The pressing block adjusts the rebound force of the pressing plate through the pressing adjustment assembly. The pressing adjustment assembly includes a pressing adjustment plate. The rear side of the pressing block has a mounting hole. The pressing adjustment plate has vertically arranged strip holes. A locking fastener is provided between the mounting hole and the strip holes. The pressing adjustment plate adjusts its position in the pressing cavity by changing the position of the mounting hole relative to the strip holes. One end of the torsion spring abuts against the pressing adjustment plate.

[0017] With the above structure, this utility model has the following beneficial effects: 1. By adopting the auxiliary pressure cylinder assembly and the pressing assembly, the auxiliary pressure cylinder assembly, the pressing assembly, and the sewing machine presser foot all act on the spreading area. That is, when the garment is spread between the first rotating roller and the second rotating roller, the pressure roller presses down on the front side of the garment, the sewing machine presser foot presses down on the sewing position of the garment, and the pressure plate presses down on the back side of the garment, so as to fully restrict the garment and prevent it from shifting or misaligning during the sewing process, ensuring the flatness of the garment; and, since the pressure roller adopts the roller rotation setting, the garment and the pressure roller slide against each other, so that it is not easy to leave indentations when the garment is pressed; and the torsion spring setting in the pressure plate provides a buffer space when the pressure plate presses down on the garment, thereby preventing the pressure plate from pressing tightly on the garment and leaving indentations; compared with the prior art, the setting of the pressing assembly and the auxiliary pressure cylinder assembly, combined with the sewing machine presser foot, can ensure the flatness of the garment during the sewing process, avoid the displacement of the sewing thread, and have high sewing accuracy and good reliability.

[0018] 2. The guide bob mechanism of this utility model, combined with the auxiliary pressure cylinder assembly and the sewing machine presser foot, allows the insert strip in the guide bob mechanism to be moved to the guide bob position of the garment before sewing. Then, the pressure cylinder and the sewing machine presser foot are used to position the guide bob of the garment. Then, air is released from the air vent of the insert strip to make the seam bob of the garment hem tilt forward (i.e., the guide bob of the garment moves along the back side of the garment). Then, the insert strip is moved out of the garment and the sewing machine presser foot is raised in sequence, thereby completing the guide bob at the hem of the garment. This operation is simple and convenient, and the guide bob positioning is accurate. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the hem sewing machine of this utility model.

[0020] Figure 2 This is a schematic diagram of the clothing securing mechanism installed on the base in this utility model.

[0021] Figure 3 This is a schematic diagram of the auxiliary pressure cylinder assembly in this utility model.

[0022] Figure 4 This is an exploded view of the auxiliary pressure cylinder assembly in this utility model.

[0023] Figure 5 This is a schematic diagram of the pressing component in this utility model.

[0024] Figure 6 This is a schematic diagram of the pressing component from another angle in this utility model.

[0025] Figure 7 This is an exploded view of the pressing component in this utility model.

[0026] In the picture:

[0027] 1a-Workbench; 2a-Sewing machine head; 21a-Base; 22a-Sewing machine presser foot; 3a-Moving table assembly; 41a-First rotating roller; 42a-Second rotating roller;

[0028] 1-Auxiliary pressure cylinder assembly; 11-Pressure cylinder frame; 111-Arc-shaped section; 12-Pressure roller; 121-Fixed shaft; 13-Pressure cylinder cylinder;

[0029] 2-Pressure assembly; 21-Pressure block; 211-Pressure cavity; 212-Pressure hole; 213-Mounting hole; 22-Pressure plate; 221-Pressure plate lug; 2211-Through hole; 23-Torsion spring; 24-Pressure adjusting plate; 241-Strip hole; 25-Pressure cylinder;

[0030] 31-Pressure cylinder mounting plate; 32-Pressure cylinder half piece;

[0031] 41 - Rotating shaft;

[0032] 51- Pressing down on the connector; 52- Pressing down on the bracket;

[0033] 61-Insertion strip; 62-Guide bone mounting plate; 63-Guide bone connector; 64-Guide bone cylinder. Detailed Implementation

[0034] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0035] A hem sewing machine with a garment securing mechanism, which is an improvement on a conventional hem sewing machine.

[0036] like Figure 1 As shown, a conventional hem sewing machine includes a worktable 1a and a sewing machine head 2a, a moving table assembly 3a, a garment support mechanism, and a bobbin guide mechanism mounted on the worktable 1a. For ease of description, the width direction of the worktable 1a is considered the left-right direction, and the length direction is considered the front-back direction. The sewing machine head 2a has a base 21a, which is fixedly mounted on the worktable 1a or slides along the left-right direction. A sewing machine presser foot 22a is conventionally mounted on the sewing machine head 2a in a height-adjustable manner. The moving table assembly 3a is mounted on the worktable 1a in a way that allows it to slide along the front-back direction. The garment support mechanism includes a sliding opening assembly, which includes... The first rotating roller 41a and the second rotating roller 42a are arranged sequentially from front to back, and the length direction of the first rotating roller 41a and the second rotating roller 42a are both arranged in the left-right direction. The first rotating roller 41a and the second rotating roller 42a are respectively slidable back and forth by conventional sliding structures. When in use, the garment is placed between the first rotating roller 41a and the second rotating roller 42a, and the moving table assembly 3a is covered by the garment. During sewing, the table surface of the sewing machine head 2a is connected to the moving table assembly 3a. The first rotating roller 41a and the second rotating roller 42a together form the garment spreading area, which is the range for spreading the garment.

[0037] It should be noted that, in this embodiment, the conventional hem sewing machine described above can be a hem sewing machine with publication number CN113622095A, that is, the worktable 1a and the sewing machine head 2a, the moving table assembly 3a and the garment support mechanism installed on the worktable 1a are all components described in the hem sewing machine; in addition, the folding mechanism and the feeding mechanism in the hem sewing machine also adopt the mechanisms described in the hem sewing machine, and the sewing machine presser foot can be a sewing machine presser foot that is already sold on the market. In this embodiment, the sewing machine presser foot is selected from the conventional hem sewing machine.

[0038] The improvement of this utility model is that, as Figure 1-5 As shown, it also includes a garment stabilizing mechanism, which includes an auxiliary presser assembly 1 and a pressing assembly 2. The auxiliary presser assembly 1, the sewing machine presser foot 22a, and the pressing assembly 2 are arranged sequentially from front to back. The auxiliary presser assembly 1 is located between the first rotating roller 41a and the table surface of the sewing machine head 2a, and the auxiliary presser assembly 1 is located on the upper side of the table surface of the sewing machine head 2a. The pressing assembly 2 is located on the upper side of the rear part of the table surface of the moving table assembly 3a. The projections of the auxiliary presser assembly 1, the sewing machine presser foot, and the pressing assembly 2 fall on the spreading area.

[0039] like Figure 2-4 As shown, the auxiliary pressure cylinder assembly 1 includes a pressure cylinder frame 11 and a pressure roller 12. The pressure cylinder frame 11 is n-shaped and is mounted on the front side of the base 21a in a way that allows it to move up and down. The axis of the pressure roller 12 is arranged in the left-right direction, and both ends of the pressure roller 12 are respectively hinged to the pressure cylinder frame 11, that is, the left end of the pressure roller 12 is hinged to the left end of the pressure cylinder frame 11, and the right end of the pressure roller 12 is hinged to the right end of the pressure cylinder frame 11. In this embodiment, the hinge structures at both ends of the pressure roller 12 adopt conventional hinge structures. That is, the pressure roller 12 can be hinged to the pressure cylinder frame 11 by a shaft or a shaft pin. Taking the left end of the pressure roller 12 as an example, the pressure roller 12 has a shaft hole, and a fixed shaft 121 is inserted into the shaft hole. There is a clearance fit between the shaft hole and the fixed shaft 121 so that the pressure roller 12 can roll relative to the fixed shaft 121. The two ends of the pressure cylinder frame 11 have fixed holes respectively. The two fixed holes are arranged opposite to each other, and the two ends of the fixed shaft 121 are tightly inserted into the corresponding fixed holes, so that the fixed shaft 121 is fixedly installed on the pressure cylinder frame 11.

[0040] Furthermore, the aforementioned pressure roller 12 is a cylindrical object made of silicone material.

[0041] Furthermore, the aforementioned auxiliary pressure cylinder assembly 1 also includes a pressure cylinder cylinder 13. The pressure cylinder frame 11 is raised and lowered via the pressure cylinder cylinder 13. Specifically, the pressure cylinder cylinder 13 is arranged vertically, and the cylinder body of the pressure cylinder 13 is fixedly installed on the front side of the base 21a. The fixed installation structure of the cylinder body of the pressure cylinder 13 is a conventional structure. For example, a pressure cylinder mounting plate 31 is fixedly installed on the front side of the base 21a, and the two are locked together by bolts and mounting holes. A pressure cylinder mounting assembly is fixedly installed on the front side of the pressure cylinder mounting plate 31. This pressure cylinder mounting assembly includes two mutually closing pressure cylinder halves 321, which are used to press the cylinders together. The mating sides of the two cylinder halves 321 are called mating sides. The mating sides of the two cylinder halves 321 are respectively recessed to form arc-shaped concave surfaces. The two cylinder halves 321 are joined together so that the two arc-shaped concave surfaces together form a cylinder mounting hole. This cylinder mounting hole is arranged vertically to allow the cylinder cylinder 13 to be fixed inside. The cylinder body of the cylinder cylinder 13 is located above the piston rod of the cylinder cylinder 13, and the piston rod of the cylinder cylinder 13 is connected to the middle position of the top of the cylinder frame 11. This allows the cylinder frame 11 to move upwards or downwards through the extension and retraction of the piston rod of the cylinder cylinder 13, thereby causing the cylinder roller 12 to move upwards or downwards. In this embodiment, when the cylinder roller 12 is installed on the cylinder frame 11, the cylinder roller 12 protrudes from the cylinder frame 11 to facilitate rolling contact between the cylinder roller 12 and the surface of the clothing.

[0042] In this embodiment, the two pressure cylinder halves 321 and the pressure cylinder mounting plate 31 are installed together using a conventional mounting structure. For example, the pressure cylinder half 321 on the front side has at least one mounting hole 1, the pressure cylinder half 321 on the rear side has a mounting hole 2 corresponding to each mounting hole 1, and the pressure cylinder mounting plate 31 has a mounting hole 3 corresponding to each mounting hole 2. A locking fastener is provided between each corresponding mounting hole 1, mounting hole 2 and mounting hole 3. The locking fastener can be a screw, rivet or bolt. Preferably, mounting hole 2 and mounting hole 3 can both be threaded holes.

[0043] Furthermore, the aforementioned pressure roller frame 11 includes an integrally connected straight section and two oppositely arranged arc-shaped sections. The piston rod of the pressure roller cylinder 13 is connected to the middle position of the straight section, and the two can be fixed together in a conventional manner. Both arc-shaped sections 111 are arc-shaped sections that bend downwards from front to back, and the left end of the pressure roller 12 is hinged to the rear end of the arc-shaped section 111 on the left side, and the right end of the pressure roller 12 is hinged to the rear end of the arc-shaped section 111 on the right side, so as to increase the contact area between the pressure roller 12 and the clothing, thereby achieving rolling pressure on the clothing. Preferably, with the sewing machine head table as a reference, the rear ends of both arc-shaped sections 111 are located at the lowest point of the pressure roller frame 11.

[0044] In this way, when the garment moves between the first rotating roller 41a and the second rotating roller 42a and is moved by the rotation of the first rotating roller 41a and the second rotating roller 42a, the surface of the pressure roller 12 continuously presses and rolls the surface of the garment. On the one hand, it fixes the garment so that it does not wrinkle, fold, shift or misalign when it is in front, especially the seam position of the hem. On the other hand, due to the rolling action, compared with the direct pressing of the pressure plate, the pressure roller 12 can avoid leaving indentations or marks on the garment.

[0045] like Figure 2 As shown and as Figure 5-7 As shown, the pressing assembly 2 includes a pressing block 21, a pressing plate 22, and a torsion spring 23. The pressing block 21 is indirectly mounted on the rear side of the base 21a in a way that allows it to move up and down, and the lower side of the pressing block 21 has an n-shaped pressing cavity 211. The rear part of the pressing plate 22 is hinged to the pressing block 21 via a rotating shaft 41. The torsion spring 23 is sleeved on the outside of the rotating shaft 41, and the two ends of the torsion spring 23 abut against the rear and upper sides of the pressing cavity 211, respectively.

[0046] Furthermore, the aforementioned pressing plate 22 is hinged to the pressing block 21 via a rotating shaft 41, which is a conventional hinge method. Specifically, the pressing block 21 has two pressing holes 212 arranged opposite to each other. The rotating shaft 41 is inserted into the two pressing holes 212, that is, the diameter of the rotating shaft 41 is smaller than the diameter of the pressing hole 212, so as to facilitate the rotation of the rotating shaft 41 relative to the pressing block 21. The rotating shaft 41 is arranged in the left-right direction and is located in the pressing cavity 211. The two ends of the rotating shaft 41 protrude from the left and right ends of the pressing block 21, respectively. The front and rear sides of the rear side of the pressing plate 22 are respectively provided with pressing plate lugs 221. The two pressing plate lugs 221 are provided with through holes 2211. The outer diameter of the rotating shaft 41 is slightly larger than or equal to the diameter of the through hole 2211, so that the rotation of the pressing plate 22 drives the rotating shaft 41 to rotate. In this embodiment, the assembly process of the pressing component 2 is as follows: the rotating shaft 41 passes through the through hole 2211 on the left side, the pressing hole 212 on the left side, the pressing cavity 211, the pressing hole 212 on the right side and the through hole 2211 on the right side in sequence, and then is locked with a nut. At this time, the rotating shaft 41 and the through hole 2211 are tightly fitted, and the rotating shaft 41 and the pressing hole 212 are loosely fitted.

[0047] Furthermore, the aforementioned pressing block 21 adjusts the rebound force of the pressing plate 22 through the pressing adjustment assembly. Specifically, the pressing adjustment assembly includes a pressing adjustment piece 24, with the pressing cavity 211 extending through it from front to back, and the pressing adjustment piece 24 located at the rear side of the pressing cavity 211. The mounting structure between the pressing adjustment piece 24 and the pressing block 21 is as follows: a mounting hole 213 is provided on the rear side of the pressing block 21, and a strip-shaped hole 241 is provided on the pressing adjustment piece 24. This strip-shaped hole 241 is arranged vertically, and the mounting hole 213 and the strip-shaped hole 241 correspond to each other. A locking fastener (not shown in the figure) is provided between the mounting hole 213 and the strip hole 241. This fastener can be a conventional fastener such as a screw, rivet, or bolt. One end of the torsion spring 23 abuts against the front side wall of the pressing adjustment piece 24. In this way, by changing the position of the pressing adjustment piece 241 relative to the pressing cavity 211, that is, changing the position of the mounting hole 213 relative to the strip hole 241, the torque of the torsion spring 23 is changed, thereby changing the buffering force of the pressure piece 22 during use, so as to adjust it to a suitable position, avoid damage to clothing, and facilitate assembly by the operator.

[0048] Furthermore, the installation structure of the aforementioned pressing block 21 is as follows: a pressing connector 51 is installed on the lower part of the rear side of the seat 21a. The pressing connector 51 is arranged in the front-rear direction and can be connected to the table of the sewing machine head. A pressing bracket 52 is installed at the rear end of the pressing connector 51. Preferably, the pressing connector 51 is hinged to the lower part of the pressing bracket 51 by a conventional hinge structure, for example, the pressing connector 51 is hinged to the lower part of the pressing bracket 51 by a pivot or pin. The pressing bracket 52 is L-shaped and presses... A pressing cylinder 25 is installed on the upper end of the bracket 52. The pressing cylinder 25 is arranged vertically, and the mounting structure of the pressing cylinder 25 on the pressing bracket 51 can adopt the same mounting structure as the aforementioned pressing cylinder 13. The cylinder body of the pressing cylinder 25 is located on the upper side of the piston rod of the pressing cylinder 25, and the piston rod of the pressing cylinder 25 is connected to the pressing block 21. The mounting structure of the two is a conventional structure. For example, the upper side of the pressing block 21 is provided with a mounting hole, and the piston rod of the pressing cylinder 25 is tightly inserted or jammed into the mounting hole.

[0049] As a preferred embodiment, the aforementioned pressure plate 22 is divided into a front section and a rear section that are connected to each other. The front section is an inclined section that slopes downward from front to back, and the rear section is arranged to slope upward from front to back. After the pressure plate 22 is assembled, it can press down on the clothing on the front side of the horizontal pressure line with a small contact area. At the same time, the front section of the pressure plate 22 is elastic through the torsion spring 23, so that the front section of the pressure plate 22 will not press hard on the clothing, thereby avoiding leaving indentations on the clothing.

[0050] In this way, when the garment moves between the first rotating roller 41a and the second rotating roller 42a and is moved by the rotation of the first rotating roller 41a and the second rotating roller 42a, the front part of the pressure plate 22 contacts and engages with the surface of the garment, thereby restricting the back side of the garment from being stretched open and ensuring the flatness of the back side of the garment.

[0051] This utility model discloses a hem sewing machine with a garment stabilizing mechanism. The garment is fitted between the first rotating roller 41a and the second rotating roller 42a. Before sewing the hem of the garment, the pressure roller 12 moves under the action of the piston rod of the pressure cylinder 13, thereby making the pressure roller 12 contact the surface of the garment and achieve rolling engagement. Meanwhile, the pressure plate 22 moves under the action of the piston rod of the pressing cylinder 25, thereby making the front part of the pressure plate 22 elastically press down on the surface of the garment, thus achieving sliding engagement with the garment. Combined with the hem sewing process, the sewing machine presser foot presses down on the hem of the garment. In this way, during the sewing process of the hem of the garment, the front side, the sewing position, and the back side of the garment are pressed down and limited, preventing wrinkles, folds, and / or displacement of the garment, ensuring the flatness of the hem of the garment during the sewing process, and ensuring the flatness of the seam.

[0052] Furthermore, the aforementioned guide mechanism is located between the auxiliary pressure cylinder assembly 1 and the sewing machine presser foot 22a, and the specific structure of the guide mechanism is as follows.

[0053] The guide mechanism includes a left-right movable insert 61, which is arranged in the left-right direction. An air vent is provided on the front side of the insert 61 near the left end of the sewing machine head 21a. An airflow channel arranged in the left-right direction is provided inside the insert 61, and the airflow channel is connected to the air vent. The left-right sliding structure of the insert 61 is as follows: a guide mounting plate 62 is installed on the lower side of the base 21a, and a guide slide rail is arranged in the left-right direction on the lower side of the guide mounting plate 62. The guide slide rail is slidably engaged with the guide slider. A guide connector 63 is fixedly installed on the right end of the insert 61, and the guide slider is connected to the insert 61 through the guide connector 63.

[0054] Furthermore, the seat 21a is equipped with a guide cylinder 64, which is arranged in the left-right direction. The piston rod of the guide cylinder 64 is connected to the guide slider. Thus, by extending and retracting the guide cylinder 64, the guide slider is driven to slide along the direction of the guide rail, thereby driving the insert 64 to move left and right.

[0055] In this way, when the garment rotates counterclockwise under the drive of the first rotating roller 41a and the second rotating roller 42a, the sewing needle of the sewing machine head, in conjunction with the sewing machine presser foot, sews along the hem of the garment. When sewing reaches the seam of the garment, the sewing machine presser foot skips the seam first, and then the insert 61 is inserted near the seam and located behind the seam. At this time, the air outlet of the insert 61 is located at the seam of the hem. Then, the sewing machine presser foot is located behind the seam, and air is blown from the air outlet of the insert 61 to shift the seam forward so that the seam finally falls to the inside of the back piece of the garment. Then, the insert 61 moves to the left to leave the seam position of the hem. Then, the sewing machine presser foot moves up and rotates the garment clockwise so that the sewing machine presser foot is located in front of the seam. Then, the sewing machine presser foot presses down on the garment, and then the sewing needle of the sewing machine head begins to sew the hem, thus sewing the seam corresponding to the hem position. In this way, the structure is simple and the operation is convenient.

[0056] The above description is only a preferred embodiment of this invention. All equivalent changes and modifications made within the scope of the claims of this utility model shall fall within the scope of the claims of this utility model.

Claims

1. A hem sewing machine with a garment stabilizing mechanism, comprising a worktable and a sewing machine head, a garment support mechanism, a moving table assembly, and a bobbin guide mechanism mounted on the worktable, wherein the length direction of the worktable is the front-to-back direction and the width direction is the left-to-right direction, and the sewing machine head is provided with a base; the garment support mechanism includes a first rotating roller and a second rotating roller that can slide in the front-to-back direction, the first rotating roller and the second rotating roller are respectively disposed on the front side and the rear side of the sewing machine head, the second rotating roller is located on the rear side of the moving table assembly, and the first rotating roller and the second rotating roller together form a garment support area; characterized in that: It also includes a garment stabilizing mechanism, which includes an auxiliary presser cylinder assembly and a pressing assembly corresponding to the opening area. The sewing machine presser foot on the sewing machine head corresponds to the opening area. The auxiliary presser cylinder assembly is located between the first rotating roller and the table surface of the sewing machine head, and the pressing assembly is located on the upper side of the rear part of the table surface of the moving table assembly. The auxiliary presser cylinder assembly includes a presser cylinder frame mounted on the base in a way that can move up and down and left and right arranged presser rollers. The presser cylinder frame is n-shaped, and the two ends of the presser cylinder frame are respectively hinged to the presser rollers. The pressing assembly includes a pressing block, a pressing plate, and a torsion spring. The pressing block is indirectly mounted on the base in a way that can move up and down, and the lower side of the pressing block has an n-shaped pressing cavity. The rear part of the pressing plate is hinged to the pressing cavity through a rotating shaft. The torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring abut against the rear and upper sides of the pressing cavity, respectively.

2. The hem sewing machine with a garment securing mechanism according to claim 1, characterized in that: The auxiliary pressure cylinder assembly also includes a pressure cylinder, the cylinder body of which is fixedly installed on the front side of the base, and the pressure cylinder is arranged vertically. The piston rod of the pressure cylinder is drivenly connected to the top of the pressure cylinder frame.

3. A hem sewing machine with a garment securing mechanism according to claim 2, characterized in that: The presser frame includes an integrally connected straight section and two oppositely arranged arc-shaped sections. The piston rod of the presser cylinder is drivenly connected to the middle position of the straight section. Both arc-shaped sections are bent downwards from front to back. The two ends of the presser roller are respectively hinged to the rear ends of the corresponding arc-shaped sections. With the sewing machine head table as a reference, the rear ends of both arc-shaped sections are located at the lowest point of the presser frame.

4. A hem sewing machine with a garment securing mechanism according to claim 3, characterized in that: The pressure roller is a cylindrical object made of silicone material.

5. A hem sewing machine with a garment securing mechanism according to claim 3, characterized in that: The guide bone mechanism is located between the auxiliary pressure cylinder assembly and the sewing machine presser foot.

6. A hem sewing machine with a garment securing mechanism according to claim 5, characterized in that: The guide bone mechanism includes a spool that can move left and right. The spool is arranged left and right, and an air vent is provided on the front side of the spool near the left end of the sewing machine head. An airflow channel is provided inside the spool in the left and right direction, and the airflow channel is connected to the air vent.

7. A hem sewing machine with a garment securing mechanism according to claim 6, characterized in that: A guide bone mounting plate is installed on the lower side of the base. A guide bone slide rail is arranged on the lower side of the guide bone mounting plate in the left-right direction. A guide bone slider is slidably fitted on the guide bone slide rail. A guide bone connector is fixedly installed on the right end of the insert. The guide bone slider is connected to the insert through the guide bone connector.

8. A hem sewing machine with a garment securing mechanism according to claim 7, characterized in that: The seat is equipped with a guide cylinder, which is arranged in the left-right direction, and the piston rod of the guide cylinder is connected to the guide slider.

9. A hem sewing machine with a garment securing mechanism according to claim 1 or 2, characterized in that: A pressing connector is installed on the lower part of the rear side of the seat body, arranged in the front-to-back direction. An L-shaped pressing bracket is installed at the rear end of the pressing connector. A pressing cylinder is fixedly installed on the upper side of the pressing bracket. The pressing cylinder is arranged vertically, and the piston rod of the pressing cylinder is connected to the upper side of the pressing block.

10. A hem sewing machine with a garment securing mechanism according to claim 9, characterized in that: The pressing block adjusts the rebound force of the pressing plate through a pressing adjustment assembly. The pressing adjustment assembly includes a pressing adjustment plate. The rear side of the pressing block has a mounting hole, and the pressing adjustment plate has vertically arranged strip holes. A locking fastener is provided between the mounting hole and the strip holes. The pressing adjustment plate adjusts its position in the pressing cavity by changing the position of the mounting hole relative to the strip holes. One end of the torsion spring abuts against the pressing adjustment plate.

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