Expanding device and hemming machine

Abstract

The application discloses a kind of opening device and hem machine.The opening device is used in hem machine, hem machine includes fixed support and the two cloth guide rollers of being arranged on fixed support, opening device includes slide rail, sliding block, opening piece and drive motor.Slide rail is arranged on fixed support;Sliding block is arranged on the slide rail;Opening piece is arranged on sliding block, and be configured to follow sliding block along slide rail movement;Drive motor is used to drive sliding block and opening piece slide on slide rail, opening piece is configured to cooperate with two cloth guide rollers in sliding process, and opening sleeve is opened in two cloth guide rollers and opening piece on the hem of clothes.Such, by being arranged two cloth guide rollers and support assembly on hem machine to open the hem of clothes, can shorten the time of hem opening, can improve opening efficiency.Because of the addition of opening piece, increase the friction between clothes, can avoid clothes from cloth guide roller and make the volume of hem machine reduce, reduce the floor area of hem machine.

Description

Technical Field

[0001] This application relates to the field of garment processing equipment technology, and more specifically, to a stretching device and a hem machine. Background Technology

[0002] Before sewing the hem of a garment, the hem needs to be spread out by the two guide rollers of the hem-sewing machine. However, spreading the hem of the garment through the two spreading points formed by the two guide rollers requires the two guide rollers to move a relatively large distance, resulting in a long spreading time and reduced efficiency. Moreover, the long distance between the two guide rollers after spreading the hem also requires the hem-sewing machine to be increased in size to accommodate longer guide rails for the two guide rollers to slide and spread the hem of the garment, thus increasing the footprint of the hem-sewing machine. Finally, because there are only two spreading points, the friction between the garment and the guide rollers is small, causing the garment to easily slip off the guide rollers and hinder sewing. Summary of the Invention

[0003] This application provides a spreading device and a swing mechanism.

[0004] The spreading device of this application is used in a hem-lifting machine. The hem-lifting machine includes a fixed bracket and two guide rollers disposed on the fixed bracket. The spreading device includes a slide rail, a slider, a spreading member, and a drive motor. The slide rail is disposed on the fixed bracket; the slider is disposed on the slide rail; the spreading member is disposed on the slider and configured to follow the slider along the slide rail; the drive motor is used to drive the slider and the spreading member to slide on the slide rail. The spreading member is configured to cooperate with the two guide rollers during the sliding process to spread the hem of the garment sleeved on the two guide rollers and the spreading member.

[0005] Thus, the hem of the garment is opened by three opening points through two guide rollers and a support assembly. When the hem of the garment is opened by adjusting the distance between the guide rollers, the distance the two guide rollers need to move can be shortened due to the addition of the opening component, thereby shortening the opening time and improving efficiency. In addition, after the hem of the garment is opened, the distance between the two guide rollers is shortened accordingly, and the slide rail for the guide rollers to move can be shortened accordingly, effectively reducing the size of the hem machine and thus reducing the floor space occupied by the hem machine. Finally, due to the three opening points, the friction between the guide rollers and the garment is increased, which can prevent the garment from slipping off the guide rollers.

[0006] In some embodiments, the fixed support includes a platform with a tabletop, two guide rollers disposed on the tabletop, the two guide rollers and the spreading member extending axially along the front-rear direction of the platform, at least one of the guide rollers being configured to move laterally along the platform, a slide rail disposed on the platform and located below the tabletop, and a drive motor for driving the slider to slide on the slide rail to cause the spreading member to slide vertically along the platform.

[0007] In this way, the three support points of the stretching component and the two guide rollers form a triangle arrangement, which can effectively shorten the moving distance of the two guide rollers and further shorten the distance between the two guide rollers after stretching. In addition, the slide rail and the stretching component are set below the hem machine, which effectively utilizes the space of the hem machine.

[0008] In some embodiments, the spreading device includes a correction element and a correction motor. The correction element is rotatably connected to the slider. The spreading element is disposed on the correction element, and the correction motor is disposed on the slider for driving the correction element to rotate so that the spreading element pitches along the vertical direction of the platform.

[0009] Thus, by setting a correction component and a correction motor on the spreading device, the correction component can cooperate with the guide roller to correct the deviation under the drive of the correction motor, thereby reducing the working pressure of the guide roller correction device.

[0010] In some embodiments, the hem machine includes a correction sensor for detecting whether the garment is in place, over-placed, or out of place on the guide roller. The spreading device includes a controller for controlling the correction motor so that when the garment is in place, the spreading member is at the origin; when the garment is over-placed, the spreading member is in an upward position; and when the garment is out of place, the spreading member is in a downward position.

[0011] In this way, by detecting the position of the garment on the guide roller by the correction sensor, the controller controls the movement of the stretching component according to the position of the garment. This simplifies the correction movement of the stretching component, meets the correction requirements, is easy to set up, and reduces costs.

[0012] In some embodiments, the controller includes a slotted photoelectric sensor, which includes a slotted component fixedly connected to the slider. The slotted component forms a groove. The slotted photoelectric sensor includes a light emitter and a light receiver aligned on two inner sides of the groove, and a trigger fixedly connected to the correction component. When the trigger is configured to block the light emitter and the light receiver, the expansion component is located at the origin.

[0013] Thus, by selecting a slotted photoelectric sensor as the controller, it is readily available and the cost can be reduced.

[0014] In some embodiments, the hem machine includes a guide roller motor for driving the two guide rollers to rotate, and the spreading device includes a rotary motor mounted on the spreading member for driving the spreading member to rotate synchronously with the two guide rollers.

[0015] In this way, by controlling the opening component and the two guide rollers to rotate synchronously by rotating the motor, it is possible to avoid pulling the clothes, which would cause the clothes to wrinkle and affect the sewing effect.

[0016] In some embodiments, the rotating motor includes a baffle disposed on the spreader and configured such that the garment is fitted onto the guide roller along the baffle.

[0017] In this way, by setting a baffle on the rotating motor, it is possible to prevent the clothes from coming into contact with the rotating motor and to prevent the clothes from being sucked in and affecting the unfolding.

[0018] In some embodiments, the spreading device includes a zero-point sensor disposed on the slide rail for detecting whether the spreading member is at the zero point. The spreading device also includes a second control device for controlling the drive motor to drive the slider after sewing is completed, so that the spreading member returns to the zero point.

[0019] Thus, by setting a zero-point sensor and a second control device on the slide rail, the stretching component can be controlled to return to the zero point after sewing is completed, thus initializing the position of the stretching component. Furthermore, the second controller can understand the operating stroke of the garment, achieving the purpose of precise control.

[0020] In some embodiments, the expander includes a washer fitted onto the expander.

[0021] Thus, by placing washers on the stretcher, the friction between the stretcher and the clothing can be increased, preventing the clothing from falling off.

[0022] The hem machine of this application includes a fixed bracket, two guide rollers, a platform, a correction sensor, a guide roller motor, and the spreading device described in any of the above embodiments.

[0023] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0025] Figure 1 This is a structural schematic diagram of the helical mechanism according to certain embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the spreading device according to certain embodiments of this application;

[0027] Figure 3 This is a top view of a gas controller according to certain embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the spreading device according to certain embodiments of this application;

[0029] Figure 5 This is a schematic diagram of a scenario for the spread-out correction control method according to certain embodiments of this application;

[0030] Figure 6 This is a flowchart illustrating the spread-out correction control method of certain embodiments of this application.

[0031] Icon labels:

[0032] 100. Hem-down machine; 10. Fixed bracket; 11. Platform; 111. Tabletop; 112. Column; 20. Guide roller; 30. Spreading device; 31. Slide rail; 32. Slider; 321. Synchronous belt toothed plate; 33. Spreading component; 331. Washer; 34. Drive motor; 341. Fixed plate; 342. Synchronous pulley; 343. Synchronous belt; 35. Rotating motor; 351. Transmission belt; 352. Transmission pulley; 353. Stop 36. Plate; 361. Correcting component; 362. Correcting synchronous pulley; 363. Correcting synchronous belt; 364. Correcting fixing plate; 365. Correcting bearing; 37. Correcting motor; 38. Controller; 381. Groove photoelectric sensor; 3811. Groove component; 3812. Groove; 3813. Light emitter; 3814. Light receiver; 3815. Trigger; 39. Zero point sensor; 40. Guide roller motor; 50. Correcting sensor. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0034] In the description of this application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly. In one example, they can be a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection, an electrical connection, or a connection that allows communication between them; they can be a direct connection or an indirect connection through an intermediate medium; they can be the internal connection of two elements or the interaction between two elements.

[0036] In embodiments of this application, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Please see Figure 1 and Figure 2 The spreading device 30 of this application embodiment is used in a hem machine 100. The hem machine 100 includes a fixed bracket 10 and two guide rollers 20 disposed on the fixed bracket 10. The spreading device 30 includes a slide rail 31, a slider 32, a spreading member 33, and a drive motor 34. The slide rail 31 is disposed on the fixed bracket 10; the slider 32 is disposed on the slide rail 31; the spreading member 33 is disposed on the slider 32 and configured to follow the slider 32 along the slide rail 31; the drive motor 34 is used to drive the slider 32 and the spreading member 33 to slide on the slide rail 31. The spreading member 33 is configured to cooperate with the two guide rollers 20 during the sliding process to spread the hem of the garment sleeved on the two guide rollers 20 and the spreading member 33.

[0038] Thus, the hem of the garment is opened by three opening points through the two guide rollers 20 and the support assembly. When the hem of the garment is opened by adjusting the distance between the two guide rollers 20, the distance that the two guide rollers 20 need to move can be shortened due to the addition of the opening component 33, so the opening time is shortened accordingly, improving efficiency. In addition, after the hem of the garment is opened, the distance between the two guide rollers 20 is shortened accordingly, and the track for the guide rollers 20 to move in the hem machine 100 can be shortened accordingly, effectively reducing the volume of the hem machine 100 and thus reducing the floor space occupied by the hem machine 100. Finally, due to the three opening points, the friction between the two guide rollers 20 and the garment is increased, which can prevent the garment from slipping off the two guide rollers 20.

[0039] The hem sewing machine 100 includes a fixed bracket 10 and two guide rollers 20. The two guide rollers 20 are mounted on the fixed bracket 10. When sewing the hem of a garment, the hem of the garment needs to be put onto the two guide rollers 20. The movement of one or both guide rollers 20 drives the garment to move, which can stretch the hem of the garment, so that the hem sewing machine 100 can sew the hem of the garment.

[0040] Specifically, the opening device 30 includes a slide rail 31 mounted on the fixed bracket 10 and a slider 32 slidably mounted on the slide rail 31. The guide of the slide rail 31 is parallel to the direction of gravity, allowing the slider 32 to slide along the guide of the slide rail 31. An opening member 33 is fixed on the slider 32, and the opening member 33 can move along the guide of the slide rail 31 under the action of the slider 32. The opening member 33 includes washers 331, and there can be multiple washers 331 fitted onto the opening member 33. In this way, by providing washers 331 on the opening member 33, the friction between the opening member 33 and the clothing can be increased, preventing the clothing from falling off.

[0041] The spreading device 30 includes a drive motor 34, which includes a fixing plate 341. The drive motor 34 is fixed to the fixed bracket 10 at one end away from the two guide rollers 20 via the fixing plate 341. When the garment is placed on the two guide rollers 20 on the fixed bracket 10, the drive motor 34 can drive the slider 32 to slide on the slide rail 31, so that the slider 32 can drive the spreading member 33 to move on the slide rail 31. When the spreading member 33 moves along the guide rail to contact the garment, the spreading member 33 can cooperate with the two guide rollers 20, that is, one or both guide rollers 20 move in opposite directions on the fixed bracket 10, and the spreading member 33 slides along the guide rail, thereby pulling the garment in three directions. Thus, the hem of the garment is spread open by the three support points of the spreading member 33 and the two guide rollers 20.

[0042] Optionally, the method by which the drive motor 34 drives the slider 32 to slide along the guide rail 31 can be that a synchronous wheel 342 is set on one end of the fixed bracket 10 near the two guide rollers 20. The synchronous wheel 342 is connected to the drive motor 34 through a synchronous belt 343. The synchronous belt 343 is set parallel to the slide rail 31. Then, the synchronous belt toothed plate 321 fixedly set on the slider 32 is fixedly connected to the synchronous belt 343, so that the drive motor 34 drives the synchronous wheel 342 and the synchronous belt 343 to rotate, so that the synchronous belt 343 can drive the slider 32 to slide on the slide rail 31.

[0043] Please see Figure 1 and Figure 2 In some embodiments, the fixed bracket 10 includes a platform 11, which includes a table surface 111. Two guide rollers 20 are disposed on the table surface 111. The two guide rollers 20 and the axial direction of the spreader 33 extend along the front-rear direction of the platform 11. At least one guide roller 20 is configured to be movable in the left-right direction of the platform 11. A slide rail 31 is disposed on the platform 11 and located below the table surface 111. A drive motor 34 is used to drive the slider 32 to slide on the slide rail 31 so that the spreader 33 slides in the up-down direction of the platform 11.

[0044] Thus, the three support points of the stretching member 33 and the two guide rollers 20 form a triangular arrangement, which can effectively shorten the moving distance of the two guide rollers 20 and further shorten the distance between the two guide rollers 20 after stretching. In addition, the slide rail 31 and the stretching member 33 are set below the hem machine 100, which effectively utilizes the space of the hem machine 100.

[0045] Specifically, the fixed support 10 can be a workbench or machine tool for sewing clothes in the hem-lifting machine 100. The fixed support 10 includes a platform 11, on which a table 111 is provided. A track and two guide rollers 20 are provided on the table 111. The guide of the track is parallel to the left-right direction of the platform 11. The axial direction of the two guide rollers 20 can extend along the front-back direction of the platform 11, and at least a portion of the structure of the two guide rollers 20 extends out of the table 111 of the platform 11. By installing the two guide rollers 20 on the track, one of the guide rollers 20 can move along the guide of the track, or the two guide rollers 20 can move in opposite directions along the guide of the track, thereby opening the hem of the clothes when they are placed on the two guide rollers 20.

[0046] Platform 11 also includes a column 112, which is located below the platform surface 111. A slide rail 31 and a drive motor 34 are mounted on the column 112. The guide of the slide rail 31 is parallel to the vertical direction of platform 11. A slider 32 is slidably mounted on the slide rail 31. A support member 33 is fixedly mounted on the slider 32. The axial direction of the support member 33 can extend along the front-rear direction of platform 11, and at least a portion of the support member 33 extends beyond the platform surface 111. The support member 33 is positioned below the platform surface 111 between the two guide rollers 20. When the drive motor 34 is started, it controls the slider 32 on the slide rail 31 to slide along the guide of the slide rail 31, thereby allowing the support member 33 on the slider 32 to slide along the vertical direction of platform 11.

[0047] The hem-lifting machine 100 includes two guide roller motors 40, which are respectively mounted on the table 111 and connected to two guide rollers 20 via guide roller synchronous belts. Thus, the two guide roller motors 40 drive the guide roller synchronous belts to rotate, thereby simultaneously rotating the two guide rollers 20. The spreading device 30 includes a rotary motor 35 mounted on the spreading member 33. The rotary motor 35 includes a transmission belt 351 and a transmission wheel 352. The transmission belt 351 connects the transmission wheel 352 and the rotary motor 35, and the transmission wheel 352 is fixedly connected to the spreading member 33. Driven by the rotary motor 35, the transmission belt 351 drives the transmission wheel 352 to rotate, thereby causing the spreading member 33 to rotate. Furthermore, the rotary motor 35 and the two guide roller motors 40 can drive the spreading member 33 and the two guide rollers 20 to rotate synchronously, meaning the linear velocity of the spreading member 33 is the same in magnitude and direction as the linear velocity of the two guide rollers 20. In this way, by rotating the motor 35 to control the expansion member 33 and the two guide rollers 20 to rotate synchronously, it is possible to avoid pulling the clothes, which would cause the clothes to wrinkle and affect the sewing effect.

[0048] Optionally, the rotating motor 35 also includes a baffle 353, which is disposed on the support member 33. The baffle 353 may be composed of multiple rectangular plates spliced ​​together, and can enclose the rotating motor 35 within the receiving cavity formed by the baffle 353. The baffle 353 is configured such that the garment is fitted onto the guide roller 20 along the baffle 353. In this way, by providing the baffle 353 on the rotating motor 35, it is possible to prevent the garment from contacting the rotating motor 35, and to prevent the garment from being sucked in, thus affecting the unfolding of the garment's hem.

[0049] Please see Figure 2 and Figure 3In some embodiments, the spreading device 30 includes a correction element 36 and a correction motor 37. The correction element 36 is rotatably connected to the slider 32. The spreading element 33 is disposed on the correction element 36, and the correction motor 37 is disposed on the slider 32. It is used to drive the correction element 36 to rotate so that the spreading element 33 pitches along the vertical direction of the platform 11.

[0050] Thus, by setting a correction element 36 and a correction motor 37 on the spreading device 30, the correction element 36 can cooperate with the two guide rollers 20 to correct the deviation under the drive of the correction motor 37, thereby reducing the working pressure of the guide roller correction device.

[0051] When the garment rotates on the two guide rollers 20, it cannot move in a straight line along the rollers due to external interference, causing it to shift and affecting the sewing effect. Therefore, by setting a correction element 36 on the spreading device 30, the shifted garment can be corrected.

[0052] Specifically, the hem-lowering machine 100 includes a correction sensor 50, which can be a position detection sensor, such as a laser sensor or an ultrasonic sensor. The correction sensor 50 is positioned above the two guide rollers 20, so that the detection point of the correction sensor 50 is located on the two guide rollers 20. It is used to detect whether the garment is in place, over-placed, or out of place on the two guide rollers 20. That is, it is used to detect whether the hem of the garment is at the detection point on the two guide rollers 20, whether the hem of the garment exceeds the detection point on the two guide rollers 20, or whether the hem of the garment has not yet reached the detection point on the two guide rollers 20.

[0053] The spreading device 30 includes a correction component 36 and a correction motor 37. The correction component 36 is rotatably connected to the slider 32. The spreading component 33 is fixedly mounted on the correction component 36 and, driven by the correction motor 37, can drive the correction component 36 to rotate relative to the slider 32. The correction motor 37 is fixedly mounted on the slider 32 and is used to drive the correction component 36 to rotate so that the spreading component 33 pitches along the vertical direction of the platform 11.

[0054] For example, the correction component 36 includes a correction timing wheel 361, a correction timing belt 362, a correction fixing plate 363, and a correction bearing 364. The correction timing wheel 361 is connected to the correction motor 37 through the correction timing belt 362. The correction timing wheel 361 is fixed on the correction fixing plate 363 through the correction bearing 364. One side of the correction fixing plate 363 is fixedly connected to the support component 33, and the other side of the correction fixing plate 363 is rotatably connected to the slider 32. Driven by the correction motor 37, the correction timing belt 362 drives the correction timing wheel 361 to rotate, the correction timing wheel 361 drives the correction bearing 364 to rotate, and the correction bearing 364 drives the correction fixing plate 363 to rotate. In turn, the correction fixing plate 363 drives the support member 33 to rotate relative to the slider 32. The direction of rotation is along the up and down direction of the platform 11. The support member 33 is controlled to deflect towards the platform 11 to the tilt position or to deflect away from the platform 11 to the downward position.

[0055] The spreading device 30 includes a controller 38, which can be a position detection sensor, such as a photoelectric sensor or an ultrasonic sensor. The controller 38 is mounted on the correction component 36 and can be used to control the correction motor 37 to drive the spreading component 33 to the origin when the hem of the garment is in position; the controller 38 can also control the correction motor 37 to drive the spreading component 33 to the upward position when the garment is out of position; and the controller 38 can also control the correction motor 37 to drive the spreading component 33 to the downward position when the garment is out of position. Thus, by detecting the position of the garment on the guide roller 20 using the correction sensor 50, and controlling the movement of the spreading component 33 according to the position of the garment, the correction movement of the spreading component 33 is simplified, and while meeting the correction requirements, it is easy to set up and reduces costs.

[0056] Please see Figure 4 In some embodiments, the controller 38 includes a slotted photoelectric sensor 381, which includes a slotted member 3811 fixedly connected to the slider 32. The slotted member 3811 forms a groove 3812. The slotted photoelectric sensor 381 includes a light emitter 3813, a light receiver 3814 and a trigger member 3815 fixedly connected to the correction member 36, which are aligned on the two inner sides of the groove 3812. When the trigger member 3815 is configured to block the light emitter 3813 and the light receiver 3814, the spreader 33 is located at the origin.

[0057] Thus, by selecting the slotted photoelectric sensor 381 as the controller 38, it can be easily obtained and the cost can be reduced.

[0058] Specifically, the controller 38 can be a slotted photoelectric sensor 381, which is located on the side of the correction fixing plate 363 near the slider 32. The slotted photoelectric sensor 381 also includes a slotted component 3811, a light emitter 3813, a light receiver 3814, and a trigger 3815. The slotted component 3811 can be fixedly connected to the slider 32. Two slotted components 3811 are arranged opposite to each other. The light emitter 3813 and the light receiver 3814 are respectively arranged on the two slotted components 3811. The slotted component 3811 forms a groove 3812. The groove opening direction of the groove 3812 is parallel to the front-back direction of the platform 11. The light emitter 3813 and the light receiver 3814 are both arranged on the inner side of the groove 3812, and the light emitter 3813 and the light receiver 3814 are arranged opposite to each other on the two inner side of the groove 3812. The trigger 3815 is fixedly connected to the correction fixing plate 363. When the correction component 36 has not started correction, the trigger 3815 blocks between the light emitter 3813 and the light receiver 3814. At this time, the opening component 33 is located at the origin. When the extension member 33 is in the overhead and downward positions, the trigger member 3815 cannot block the signal light emitted by the light transmitter 3813, and the light receiver 3814 can receive the signal light emitted by the light transmitter 3813.

[0059] Please refer to it again. Figure 1 In some embodiments, the spreading device 30 includes a zero-point sensor 39, which is disposed on the slide rail 31 and is used to detect whether the spreading member 33 is at the zero point. The spreading device 30 also includes a second control device for controlling the drive motor 34 to drive the slider 32 after sewing is completed, so that the spreading member 33 returns to the zero point.

[0060] Thus, by setting a zero-point sensor 39 and a second control device on the slide rail 31, the stretching component 33 can be controlled to return to the zero point after sewing is completed, the position of the stretching component 33 is initialized, and the second controller 38 can understand the operation stroke of the garment to achieve precise control.

[0061] When the hem of the garment is not being stretched, the stretching device 30 is positioned at a preset zero point on the fixed support 10. After the hem machine 100 calculates the distance the stretching device 30 should move on the slide rail 31 based on the size of the garment, it can accurately control the stretching device 30 to move the calculated distance, so that the hem of the garment is stretched without excessively pulling the garment or causing the hem of the garment to not be stretched. Alternatively, when the hem of the garment has been sewn, the stretching device 30 is controlled to return to the preset zero point on the fixed support 10, which facilitates the removal of the garment from the hem machine 100.

[0062] Specifically, the spreading device 30 includes a zero-point sensor 39, which can be a photoelectric sensor, a laser sensor, or an ultrasonic sensor, etc. The zero-point sensor 39 is located at the end of the column 112 near the platform 111 and can detect whether the spreading member 33 is located at the zero point on the column 112. For example, the zero-point sensor 39 can be a photoelectric sensor, which includes a light emitter 3813 and a light receiver 3814. When the spreading member 33 is at the zero point, the light signal emitted by the light emitter 3813 is blocked by the spreading member 33, and the light receiver 3814 cannot receive the light signal. After the spreading member 33 leaves the zero point, the light signal emitted by the light emitter 3813 can be received by the light receiver 3814, thereby enabling the zero-point sensor 39 to detect whether the spreading member 33 is located at the zero point.

[0063] The stretching device 30 also includes a second control device, which may be a central processing unit (CPU) or a micro controller unit (MCU). The second control device can control the drive motor 34 to drive the slider 32 after the garment sewing is completed, so that the stretching member 33 returns to the zero point, and control the drive motor 34 to turn off after the zero point sensor 39 detects the stretching member 33.

[0064] Please see Figure 5 and Figure 6 The present application provides a method for spreading and correcting deviation control, which includes:

[0065] Step 011: Obtain the dimensions of the garment hem, the lateral distance from the stretcher 33 to the right guide roller 20, and the longitudinal distance;

[0066] Step 012: Calculate the moving distance of the support member 33 based on the dimensions, lateral distance, longitudinal distance, and preset function;

[0067] Step 013: Obtain detection data from the correction sensor to detect the position of the hem of the garment;

[0068] Step 014: Determine whether the hem of the garment has shifted based on the detection data;

[0069] Step 015: If the hem of the garment shifts, obtain the offset amount of the garment hem in real time. The offset amount includes over-correction and under-correction.

[0070] Step 016: Determine whether the offset is overcorrected or undercorrected;

[0071] Step 017: Control the correction component 33 to push or pull the hem of the garment to correct the deviation based on the offset.

[0072] Specifically, when the hem of the garment is fitted onto the two guide rollers 20 and the stretching member 33, the dimensions of the garment hem, the lateral distance from the stretching member 33 to the right guide roller 20, and the longitudinal distance need to be input into the controller 38. The controller 38 stores a preset function, which can calculate the distance the stretching member 33 needs to move. The actual dimensions of the garment hem can be sent in real-time from the upstream production line of the hem-lifting machine 100, or given manually. The lateral and longitudinal distances from the stretching member 33 to the right guide roller 20 can be detected in real-time by the zero-point sensor 39, calculated, and sent to the controller 38. The expression for the preset function can be expressed as follows: Where s represents the distance that the stretching component 33 needs to move, l represents the size of the garment's hem, b represents the lateral distance between the stretching component 33 and the right guide roller 20, h represents the longitudinal distance between the stretching component 33 and the right guide roller 20, and η represents the stretching coefficient, which is adjusted appropriately for fabrics of different elasticity and thickness based on actual calculations. Thus, the controller 38 can control the movement of the stretching component 33 according to the calculated moving distance, thereby stretching the hem of the garment.

[0073] When the hem of the garment rotates on the two guide rollers 20 and the spreading member 33 of the hem-wearing machine 100, the correction sensor 50 needs to constantly detect whether the hem of the garment is located at the detection point on the guide rollers 20. When the correction sensor 50 determines that the hem of the garment has deviated on the guide rollers 20, it obtains the amount of deviation of the hem of the garment in real time and determines whether the hem of the garment is over-corrected or under-corrected. It should be noted that over-correction means that the hem of the garment is excessively corrected by the correction member, so that most of the hem of the garment exceeds the detection position of the correction sensor 50. Under-correction means that the degree of correction of the hem of the garment by the correction member is insufficient to reach the detection position of the correction sensor 50.

[0074] After obtaining the offset, it can be represented by B. B=0 indicates under-correction, and B=1 indicates over-correction. The controller 38 monitors and records the offset of the garment hem in real time based on the correction amount, recording the number of over-corrections as G and the number of under-corrections as Q. The functional relationship between the number of corrections and the correction amount can be expressed as:

[0075] and

[0076] The correction angle θ of the correction component 33 changes with the variables G and Q, and is expressed as θ = F(G, Q). Here, the function f(x) is the acceleration function of the correction speed θ. This acceleration function can be any type of centrally symmetric function, and it is monotonically increasing when x ∈ (0, +∞); for example, F(x) = a × x 3n +b×xn +θ1, where a and n are constants, and θ1 represents the initial angle for correction.

[0077] After determining the offset, the correction motor 37 drives the correction component 36 to rotate so that the support component 33 pitches along the vertical direction of the platform 11.

[0078] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A distraction device for use in a drop down machine, characterized in that, The hem-down machine includes a fixed bracket and two guide rollers disposed on the fixed bracket, and the spreading device includes: A slide rail, which is mounted on the fixed bracket; A slider, which is disposed on the slide rail; A support member is disposed on the slider and configured to follow the slider along the slide rail; A drive motor is provided to drive the slider and the stretching member to slide on the slide rail. The stretching member is configured to cooperate with the two guide rollers during the sliding process to pull the garment in three directions and stretch the hem of the garment on the two guide rollers and the stretching member through three support points. The hem machine also includes a guide roller motor, which drives the two guide rollers to rotate. The spreading device also includes a rotary motor mounted on the spreading member, which drives the spreading member to rotate synchronously with the two guide rollers. The spreading device also includes a correction component, a correction motor, and a controller. The correction component is rotatably connected to the slider. The spreading component is disposed on the correction component. The correction motor is disposed on the slider and is used to drive the correction component to rotate so that the spreading component can pitch along the vertical direction of the hem machine. The controller is used to control the correction motor according to the position of the hem of the garment to correct the hem of the garment.

2. The spreading device according to claim 1, characterized in that, The fixed support includes a platform, the platform includes a table surface, the two guide rollers are disposed on the table surface, the two guide rollers and the spreading member extend axially along the front-rear direction of the platform, at least one of the guide rollers is configured to be movable along the left-right direction of the platform, the slide rail is disposed on the platform and located below the table surface, and the drive motor is used to drive the slider to slide on the slide rail so that the spreading member slides along the up-down direction of the platform.

3. The spreading device according to claim 2, characterized in that, The hem machine includes a correction sensor, which is used to detect whether the clothing is in place, over-placed, or out of place on the guide roller. The controller is used to control the correction motor so that when the clothing is in place, the spreading member is at the origin; when the clothing is over-placed, the spreading member is in the upward position; and when the clothing is out of place, the spreading member is in the downward position.

4. The spreading device according to claim 3, characterized in that, The controller includes a slotted photoelectric sensor, which includes a slotted component fixedly connected to the slider. The slotted component forms a groove. The slotted photoelectric sensor includes a light emitter and a light receiver aligned on two inner sides of the groove, and a trigger fixedly connected to the correction component. When the trigger is configured to block the light emitter and the light receiver, the opening component is located at the origin.

5. The spreading device according to claim 1, characterized in that, The rotating motor includes a baffle plate disposed on the spreading member and configured such that the garment is sleeved on the guide roller along the baffle plate.

6. The spreading device according to claim 1, characterized in that, The spreading device includes a zero-point sensor, which is disposed on the slide rail and is used to detect whether the spreading member is at the zero point. The spreading device also includes a second control device, which is used to control the drive motor to drive the slider after sewing is completed, so that the spreading member returns to the zero point.

7. The spreading device according to claim 1, characterized in that, The expanding member includes a washer, which is sleeved on the expanding member.

8. A hem-down machine, characterized in that, It includes a fixed bracket, two guide rollers, a platform, a correction sensor, a guide roller motor, and an opening device as described in any one of claims 1-7.

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