Full-automatic lower hem hemming machine and sewing process thereof

Abstract

The full-automatic lower hem hemming machine comprises a hemming table, the top of the hemming table is provided with a sewing needle seat, the bottom of the sewing needle seat is provided with a telescopic rod, the bottom of the telescopic rod is connected with a sewing needle frame, one side of the telescopic rod is provided with a connecting column, and the bottom of the connecting column is provided with a sewing needle. The device is characterized in that a rotating rod is rotationally installed at the bottom of the sewing needle base through a shaft base, one end of the rotating rod is connected with an ejector block, the bottom of the ejector block makes contact with the connecting column, a rotating wheel is fixedly connected to the top end of the ejector block, an inner ratchet wheel is arranged on one side of the rotating wheel, and a pawl is rotationally installed on one side of the rotating wheel; the rotating wheel is rotationally connected with the inner ratchet wheel, the rotating wheel is rotationally arranged on the rotating rod in a sleeving mode, the pawl is connected with the inner ratchet wheel in a meshed mode, scale marks are arranged at one end of the inner ratchet wheel in a circumferential mode, and the problem that the current practicability is poor is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewing, and in particular relates to a full-automatic hem sewing machine and a sewing process thereof. Background Art

[0002] The hem sewing machine is specially designed to automatically complete the sewing, trimming and decoration of the hem of garments. The machine uses an advanced computer control system to achieve precise seam line position adjustment, fabric tension control and sewing speed optimization, thereby improving production efficiency and ensuring sewing quality.

[0003] The existing hem sewing process needs to be stopped frequently to adjust the hem folds, and the hem has a fixed requirement for the number of stitches, in order to accurately control the style and shape of the folds in a specific sewing area. The existing hem sewing process does not have the function of calculating the number of stitches, and often requires the installation of an additional counting sensor. At the same time, when the existing hem sewing process is sewing the folds, the elastic deformation of the material itself may cause the material on both sides to be uneven, and the fold seam line may be skewed, which is poor in practicality. This phenomenon has become a problem that people in this field need to solve urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology by providing a fully automatic hem sewing machine for existing skidding devices and sewing technology thereof.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a fully automatic hem sewing machine, comprising a sewing table, a sewing needle seat is arranged on the top of the sewing table, a telescopic rod is installed on the bottom of the sewing needle seat, the bottom of the telescopic rod is connected to the sewing needle holder, a connecting column is installed on one side of the telescopic rod, and a sewing needle is installed on the bottom of the connecting column, characterized in that a rotating rod is rotatably installed on the bottom of the sewing needle seat through an axle seat, one end of the rotating rod is connected to a top block, the bottom of the top block is in contact with the connecting column, the top of the top block is fixedly connected to a rotating wheel, and an inner ratchet is arranged on one side of the rotating wheel.

[0006] The present invention further describes that a pawl is rotatably installed on one side of the rotating wheel, the rotating wheel is rotatably connected to the inner ratchet, the rotating wheel is rotatably sleeved on the rotating rod, the pawl is meshingly connected to the inner ratchet, one end of the inner ratchet is circumferentially provided with scale lines, a dial is fixedly installed on one side of the sewing needle seat by welding, and the dial and the inner ratchet are sleeved together.

[0007] When in use, as the sewing needle moves up and down, each time it is lifted upward, the top block will be lifted upward, and the rotating rod will be driven to rotate a certain angle, so that the rotating wheel will rotate a certain angle, and the rotating rod will be driven to move a certain distance, driving the inner ratchet to rotate a certain angle, while the inner ratchet will not be driven to rotate when it falls in the opposite direction, and the action will only be transmitted each time it is lifted. By observing the corresponding relationship between the scale on the inner ratchet and the scale on the dial, the number of times the needle moves can be known, which is convenient for real-time statistics and does not require electronic components.

[0008] The present invention further illustrates that extension plates are correspondingly installed on both sides of the seam table, and material flattening devices are arranged on both sides of the extension plates. The material flattening device includes a mounting shell slidably installed on the outer wall of the extension plate, and a nut seat is fixedly installed on one side of the mounting shell. A double-headed screw is movably connected between the two nut seats through a threaded connection, and a second motor is installed at one end of the double-headed screw. The second motor and the extension plate are fixedly connected to each other, and when the second motor is started, the double-headed screw will rotate, which will cause the two nut seats to be forced to move toward the center, driving the two mounting shells to move toward the center, so as to simultaneously control the two flattening rollers to close or separate.

[0009] The present invention further illustrates that a flattening roller and a driving wheel are slidably installed on the inner wall of the installation shell, a folding bag is clamped between the flattening roller and the driving wheel, a motor three is installed on one side of the installation shell, the output end of the motor three is connected to the driving wheel through a coupling, a transmission belt is sleeved and connected between the flattening roller and the driving wheel, the driving wheel is driven to rotate by the motor three, and the transmission belt is driven to move, so that the flattening roller can rotate a certain angle, and an outward repulsive force is formed between the flattening roller and the driving wheel through the folding bag, so that they are not pulled and infinitely closed, and are in a balanced position.

[0010] The present invention further illustrates that the middle part of the transmission belt is broken, and an electromagnet is installed at the broken end, a connecting spring is connected between the two electromagnets, the electromagnet is electrically connected to a current controller, and the current controller is electrically connected to an external power supply. When it is necessary to adjust the distance between the flattening roller and the driving wheel, the current of the external power supply is controlled by the current controller, so that the current of the electromagnet changes, and then the attraction between the two electromagnets changes, and then the distance between the two electromagnets is adjusted, so that the distance between the flattening roller and the driving wheel changes, and the connecting spring is used to prevent the electromagnet from sliding downward.

[0011] The present invention further illustrates that a circular cavity is provided in the middle of the flattening roller, an air pump is installed inside the circular cavity, a plurality of ventilation pipes are circumferentially arranged at the output end of the air pump, a plurality of receiving grooves are evenly provided on the outer wall of the flattening roller, a hollow sliding rod is installed inside the receiving groove, an elastic flat plate is sleeved on the outside of the hollow sliding rod, and an electromagnetic valve is provided on the ventilation pipe. When the air pump outputs air pressure, the air is discharged into the hollow sliding rod through the ventilation pipe, and the elastic flat plate is squeezed outward, and the elastic flat plate rubs against the material surface while squeezing out, and as the flattening roller rotates and moves laterally, the material surface is rolled flat, so that the uneven part is squeezed toward the middle wrinkle and a large wrinkle is formed in the middle, and at this time the wrinkle is sewn with a sewing needle.

[0012] The present invention further describes that a pulling spring is also sleeved on the outside of the hollow sliding rod, and one end of the pulling spring is connected to the elastic rolling plate. The pulling spring allows the elastic rolling plate to pop out when it is subjected to pressure, and when the pressure is lost, the elastic rolling plate can be retracted into the accommodating groove through the elastic recovery action of the pulling spring.

[0013] The sewing process of the fully automatic hem sewing machine is characterized by: S1. During operation, as the sewing needle moves up and down, the wheel is driven to rotate and the scale changes. The number of needle movements can be known by observing the scale. S2. After the material is laid, as the material is transported, the flattening roller is started to gather toward the middle, and the material is flattened from the periphery to the middle using an elastic flattening plate, and wrinkles are formed in the middle, and the wrinkles are sewn with a sewing needle.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts a mechanical counting method, and as the sewing needle moves up and down, the top block is driven to swing continuously, so that the inner ratchet wheel rotates a certain angle each time and is converted into a scale displayed on the dial, which is convenient for counting and does not require the installation of an additional electronic counter. By setting a flattening roller, the materials on both sides are pushed toward the middle each time the seams are sewn, which facilitates the formation of wrinkles in the middle while the materials on both sides are flattened, thereby preventing the problem of uneven materials on both sides caused by the deformation of the material itself, and the seams are more vertical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the installation of the top block and the connecting column of the present invention; Figure 3It is a schematic diagram of the installation of the pawl of the present invention; Figure 4 It is a structural schematic diagram of the material flattening device of the present invention; Figure 5 It is a schematic diagram of the internal structure of the installation housing of the present invention; Figure 6 It is a schematic diagram of the structure of the flattening roller of the present invention; Figure 7 It is a schematic diagram of the working principle of the present invention; In the figure: 1. sewing table; 2. sewing needle holder; 21. telescopic rod; 22. sewing needle seat; 23. sewing needle; 24. connecting column; 31. rotating rod; 32. top block; 33. rotating wheel; 331. ratchet; 34. inner ratchet; 35. dial; 4. extension plate; 5. material flattening device; 51. flattening roller; 52. driving wheel; 53. mounting shell; 55. double-headed screw; 56. nut seat; 57. motor two; 58. motor three; 59. transmission belt; 591. electromagnet; 592. connecting spring; 593. current controller; 511. circular cavity; 512. air pump; 513. solenoid valve; 514. ventilation pipe; 515. receiving groove; 516. hollow sliding rod; 517. pulling spring; 518. elastic flattening plate; 88. folding bag. DETAILED DESCRIPTION

[0016] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-7 The present invention provides a technical solution: a fully automatic hem sewing machine and a sewing process thereof, comprising a sewing platform 1, a sewing needle seat 22 is arranged on the top of the sewing platform 1, a telescopic rod 21 is installed at the bottom of the sewing needle seat 22, a sewing needle frame 2 is connected to the bottom of the telescopic rod 21, a connecting column 24 is installed on one side of the telescopic rod 21, a sewing needle 23 is installed at the bottom of the connecting column 24, and the characteristics are: a rotating rod 31 is rotatably installed at the bottom of the sewing needle seat 22 through an axle seat, one end of the rotating rod 31 is connected to a top block 32, the bottom of the top block 32 is in contact with the connecting column 24, a rotating wheel 33 is fixedly connected to the top of the top block 32, and an inner ratchet 34 is arranged on one side of the rotating wheel 33; The pawl 331 is rotatably mounted on one side of the rotating wheel 33, and the rotating wheel 33 is rotatably connected with the inner ratchet 34. The rotating wheel 33 is rotatably sleeved on the rotating rod 31, and the pawl 331 is meshed and connected with the inner ratchet 34. One end of the inner ratchet 34 is circumferentially provided with a scale line. A scale plate 35 is fixedly mounted on one side of the sewing needle seat 22 by welding, and the scale plate 35 and the inner ratchet 34 are sleeved and arranged with each other. When in use, as the sewing needle 23 moves up and down, each time it is lifted up, the top block 32 is lifted up, and the rotating rod 31 is driven to rotate a certain angle, so that the rotating wheel 33 rotates a certain angle, and the rotating rod 31 is driven to move a certain distance, and the inner ratchet 34 is driven to rotate a certain angle, while the inner ratchet 34 is not driven to rotate when falling in the opposite direction, and the action is transmitted only when it is lifted each time. By observing the corresponding relationship between the scale on the inner ratchet 34 and the scale on the scale plate 35, the number of needle movements can be known, which is convenient for real-time statistics, and no electronic components are required. Extension plates 4 are correspondingly installed on both sides of the seam platform 1, and material flattening devices 5 are arranged on both sides of the extension plates 4. The material flattening device 5 includes a mounting shell 53 slidably mounted on the outer wall of the extension plate 4, and a nut seat 56 is fixedly mounted on one side of the mounting shell 53. A double-headed screw 55 is movably connected between the two nut seats 56 through a thread, and a second motor 57 is installed at one end of the double-headed screw 55. The second motor 57 and the extension plate 4 are fixedly connected to each other. When the second motor 57 is started, the double-headed screw 55 will rotate, which will cause the two nut seats 56 to move toward the center under force, driving the two mounting shells 53 to move toward the center, so as to simultaneously control the two flattening rollers 51 to close or separate; The inner wall of the installation shell 53 is slidably installed with a flattening roller 51 and a driving wheel 52. A folding capsule 88 is clamped between the flattening roller 51 and the driving wheel 52. A motor 3 58 is installed on one side of the installation shell 53. The output end of the motor 3 58 is connected to the driving wheel 52 through a coupling. A transmission belt 59 is sleeved and connected between the flattening roller 51 and the driving wheel 52. The driving wheel 52 is driven to rotate by the motor 3 58, which drives the transmission belt 59 to move, so that the flattening roller 51 can rotate. The folding capsule 88 forms an outward repulsive force between the flattening roller 51 and the driving wheel 52, so that they are not pulled and infinitely closed, and are in a balanced position; The middle part of the transmission belt 59 is disconnected, and an electromagnet 591 is installed at the broken end. A connecting spring 592 is connected between the two electromagnets 591. The electromagnets 591 are electrically connected to a current controller 593. The current controller 593 is electrically connected to an external power supply. When it is necessary to adjust the distance between the flattening roller 51 and the driving wheel 52, the current of the external power supply is controlled by the current controller 593, so that the current of the electromagnet 591 changes, thereby changing the attraction between the two electromagnets 591, and then adjusting the distance between the two electromagnets 591, so that the distance between the flattening roller 51 and the driving wheel 52 changes. The connecting spring 592 is used to prevent the electromagnet 591 from sliding downward; A circular cavity 511 is provided in the middle of the flattening roller 51, and an air pump 512 is installed inside the circular cavity 511. A plurality of ventilation pipes 514 are arranged in a circle at the output end of the air pump 512. A plurality of receiving grooves 515 are evenly provided on the outer wall of the flattening roller 51. A hollow slide bar 516 is installed inside the receiving groove 515. An elastic flattening plate 518 is sleeved on the outside of the hollow slide bar 516. An electromagnetic valve 513 is provided on the ventilation pipe 514. When the air pump 512 outputs air pressure, the air is discharged into the hollow slide bar 516 through the ventilation pipe 514, and the elastic flattening plate 518 is squeezed outward. The elastic flattening plate 518 rubs against the material surface while squeezing out. With the rotation and lateral movement of the flattening roller 51, the material surface is flattened, so that the uneven part is squeezed toward the fold in the middle, and a large fold is formed in the middle. At this time, the fold is sewn by a sewing needle. A pulling spring 517 is sleeved on the outside of the hollow slide rod 516, and one end of the pulling spring 517 is connected to the elastic rolling plate 518. The pulling spring 517 allows the elastic rolling plate 518 to pop out after being subjected to pressure. When the pressure is lost, the elastic rolling plate 518 can be retracted into the receiving groove 515 due to the elastic recovery effect of the pulling spring 517. include: S1, during operation, as the sewing needle 23 moves up and down, the rotating wheel 33 is driven to rotate and the scale changes, and the number of needle movements can be known by observing the dial 35; S2. After the material is laid, as the material is transported, the flattening roller 51 is started to gather toward the middle, and the elastic flattening plate 518 is used to flatten the material from the periphery to the middle, and wrinkles are formed in the middle, and the wrinkles are sewn by the sewing needle 23.

[0018] It adopts a mechanical counting method. As the sewing needle moves up and down, the top block is driven to swing continuously, so that the inner ratchet wheel rotates a certain angle each time and is converted into a scale displayed on the dial, which is convenient for counting. There is no need to install an additional electronic counter. By setting a flattening roller, the materials on both sides are pushed to the middle each time the seam is sewn, so that wrinkles are formed in the middle while the materials on both sides are flat, which prevents the problem of uneven materials on both sides due to the deformation of the material itself, and the seam results are more vertical.

[0019] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automatic hem sewing machine, comprising a sewing platform (1), a sewing needle seat (22) being arranged on the top of the sewing platform (1), a telescopic rod (21) being installed at the bottom of the sewing needle seat (22), a sewing needle holder (2) being connected to the bottom of the telescopic rod (21), a connecting column (24) being installed on one side of the telescopic rod (21), a sewing needle (23) being installed at the bottom of the connecting column (24), characterized in that: A rotating rod (31) is rotatably mounted on the bottom of the needle seat (22) via an axle seat, one end of the rotating rod (31) is connected to a top block (32), the bottom of the top block (32) is in contact with the connecting column (24), the top of the top block (32) is fixedly connected to a rotating wheel (33), and an inner ratchet (34) is provided on one side of the rotating wheel (33).

2. The fully automatic hem sewing machine according to claim 1, characterized in that: A ratchet (331) is rotatably mounted on one side of the rotating wheel (33), the rotating wheel (33) is rotatably connected to an inner ratchet (34), the rotating wheel (33) is rotatably sleeved on a rotating rod (31), the ratchet (331) is meshedly connected to the inner ratchet (34), one end of the inner ratchet (34) is circumferentially provided with scale lines, a scale plate (35) is fixedly mounted on one side of the sewing needle seat (22) by welding, and the scale plate (35) and the inner ratchet (34) are sleeved with each other.

3. The fully automatic hem sewing machine according to claim 2, characterized in that: Extension plates (4) are correspondingly mounted on both sides of the seaming table (1), and material flattening devices (5) are arranged on both sides of the extension plate (4). The material flattening device (5) comprises a mounting shell (53) slidably mounted on the outer wall of the extension plate (4), a nut seat (56) is fixedly mounted on one side of the mounting shell (53), a double-headed screw (55) is movably connected between the two nut seats (56) via a thread, a second motor (57) is mounted on one end of the double-headed screw (55), and the second motor (57) and the extension plate (4) are fixedly connected to each other.

4. The fully automatic hem sewing machine according to claim 3, characterized in that: A flattening roller (51) and a driving wheel (52) are slidably mounted on the inner wall of the mounting shell (53), a folding bag (88) is clamped between the flattening roller (51) and the driving wheel (52), a motor three (58) is mounted on one side of the mounting shell (53), an output end of the motor three (58) is connected to the driving wheel (52) via a coupling, and a transmission belt (59) is sleeved and connected between the flattening roller (51) and the driving wheel (52).

5. The fully automatic hem sewing machine according to claim 4, characterized in that: The transmission belt (59) is broken in the middle, and an electromagnet (591) is installed at the broken end. A connecting spring (592) is connected between the two electromagnets (591). The electromagnet (591) is electrically connected to a current controller (593), and the current controller (593) is electrically connected to an external power supply.

6. The fully automatic hem sewing machine according to claim 5, characterized in that: A circular cavity (511) is provided in the middle of the flattening roller (51), an air pump (512) is installed inside the circular cavity (511), a plurality of ventilation pipes (514) are circumferentially arranged at the output end of the air pump (512), a plurality of receiving grooves (515) are evenly provided on the outer wall of the flattening roller (51), a hollow sliding rod (516) is installed inside the receiving groove (515), an elastic flattening plate (518) is sleeved on the outside of the hollow sliding rod (516), and a solenoid valve (513) is provided on the ventilation pipe (514).

7. The fully automatic hem sewing machine according to claim 6, characterized in that: A pulling spring (517) is sleeved on the outside of the hollow sliding rod (516), and one end of the pulling spring (517) is connected to the elastic rolling plate (518).

8. The sewing process of the fully automatic hem sewing machine is characterized by: include: S1, during operation, as the sewing needle (23) moves up and down, the rotating wheel (33) is driven to rotate and the scale changes, and the number of needle movements is known by observing the scale plate (35); S2. After the material is laid, as the material is transported, the flattening roller (51) is started to gather toward the middle, and the elastic flattening plate (518) is used to flatten the material from the periphery to the middle, and wrinkles are formed in the middle, and the wrinkles are sewn by the sewing needle (23).

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