A feeding adjustment mechanism and feeding stretching length adjustment system for a sewing machine

Abstract

The invention discloses a feeding adjustment mechanism and a feeding stretching length adjustment system for a sewing machine, and specifically relates to the technical field of feeding of sewing machines. The mechanism comprises a first roller and a second roller for feeding, and a driving motor, a linear transmission mechanism and a moving seat for driving the first roller to move. The first roller is installed on the moving seat, and a torque sensor for detecting the value of the torsional moment of the first roller is provided between the first roller and the moving seat. The driving device controls the movement stroke of the moving seat according to the feedback signal of the torque sensor. The mechanism also comprises a real-time torque storage module, a first setting module, a first calculation control module and a driving module. The system monitors the torque value of the torque sensor in real time, calculates the setting value of the setting module and the real-time torque value of the real-time torque storage module through the calculation control module, controls the driving module, and automatically performs stretching control according to the torque value, so as to ensure that each time the clothing is stretched within the set range, thereby improving the quality and consistency of the clothing.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machine feeding, in particular to a feeding adjustment mechanism and a feeding stretching length adjustment system of a sewing machine. Background Art

[0002] With the development of e-commerce, people's purchasing power for clothing has greatly increased, which has put a great challenge on the production rate of factory clothing, and it is necessary to produce large quantities of clothing in a short period of time. However, the existing sewing machines can only sew clothing of a single code segment during the feeding process, or adjust the code manually. In the process of sewing various materials, the operator needs to readjust the size of the fixing device every time the clothing is changed, and adjust the new speed size according to the new code segment. This operation greatly reduces the efficiency of clothing production. And before changing the large code segment to the small code segment for sewing operation, the operator sometimes forgets to reset it, resulting in excessive pulling of the clothing, thereby pulling the clothing and scrapping the clothing, affecting the productivity of the clothing. The existing technology wastes a lot of time on the fixing of clothing, and cannot accurately fix it, resulting in subsequent sewing errors and affecting the overall texture of the clothing.

[0003] Patent No. 2021219541141 discloses a rotary feeding device of a sewing collar machine, including a first roller and a second roller for feeding, an air blowing pipe for blowing material is provided between the first roller and the second roller, and the first roller has a conical body, and a raised spiral feeding guide pattern is formed on the conical body. The rotary feeding device of the utility model is provided with a raised spiral feeding guide pattern on the conical body of the first roller. The spiral feeding guide pattern can reduce the contact area between the sewing material and the first roller, reduce the friction resistance, and balance the airflow thrust of the air blowing pipe, thereby improving the control accuracy of the deviation correction mechanism when conveying sewing materials. However, this patent only controls the accuracy of material conveying, and cannot accurately control the stretching length of the material during sewing, which leads to excessive stretching of the material. Summary of the invention

[0004] The present invention aims at the above-mentioned deficiencies of the prior art, and the technical problem to be solved by the present invention is to propose a feeding adjustment mechanism and a feeding stretching length adjustment system for a sewing machine, so as to solve the problem of inconvenient stretching of clothes in the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is a feeding adjustment mechanism of a sewing machine, including a first roller and a second roller for feeding, and a driving device for driving the first roller to move, the driving device including a driving motor, a linear transmission mechanism and a moving seat; the first roller is installed on the moving seat, and a torque sensor for detecting the torsional moment value of the first roller is provided between the first roller and the moving seat; the driving device controls the movement stroke of the moving seat according to the feedback signal of the torque sensor.

[0006] The present invention solves the above technical problems and also proposes a feeding stretching length adjustment system, comprising:

[0007] A real-time torque storage module is used to read and store the value of the torque sensor in real time;

[0008] A first setting module, used for receiving and storing a first setting value;

[0009] A first calculation control module compares the real-time torque sensor value with the first set value and outputs a comparison result;

[0010] The driving module sends a control command to the driving motor according to the output comparison result, and controls the driving motor to stop driving the moving seat when the real-time torque value reaches a first set value.

[0011] Further, including:

[0012] A second setting module, used for receiving and storing a second setting value;

[0013] A second calculation control module compares the real-time torque sensor value with the second set value and outputs a comparison result;

[0014] The driving module sends a control command to the driving motor according to the output comparison result, and controls the driving motor to stop driving the moving seat when the real-time torque value reaches the second set value.

[0015] Furthermore, it also includes an alarm module, which presets a warning value and reads a first set value and a second set value. When the first set value or the second set value exceeds the warning value, the alarm module outputs an alarm signal.

[0016] Furthermore, it also includes a clothing material calculation module, which calculates and stores the total length of clothing material. The total length of clothing material calculation formula is as follows:

[0017]

[0018] In the formula, is the total length of the fabric, is the preset length, The moving distance of the mobile seat.

[0019] Furthermore, the moving distance L of the moving seat is calculated based on the total length of the clothing material in intervals, and the interval range of L is 5 mm to 15 mm.

[0020] Furthermore, it also includes a code number storage module, which encodes the total length of the clothing material in the same interval range into the same code number and stores the code number.

[0021] Furthermore, it also includes a fast control module for reading the input code number and comparing it with the code number of the code number storage module to obtain the moving distance L of the moving seat corresponding to the code number, and controlling the driving motor to drive the moving seat to move the corresponding moving distance L.

[0022] Furthermore, it also includes a fast rebound control module, which controls the drive motor to drive the moving seat to retract to a fast loading stroke after obtaining the input code number, and the fast loading stroke is smaller than the moving distance L of the moving seat.

[0023] Furthermore, it also includes a photoelectric sensing module for detecting the starting and ending positions of the clothing material. When the photoelectric sensing module fails to detect the starting and ending positions, an alarm signal is transmitted to the alarm module.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] (1) A feeding adjustment mechanism of a sewing machine of the present invention controls the stretching of the clothes through a first roller, a driving motor, a linear transmission mechanism, a moving seat and a torque sensor. These simple mechanisms are arranged to facilitate the fixing and sewing of the clothes.

[0026] (2) The present invention provides a feeding stretching length adjustment system, which continuously sews the same code segment of clothing through a setting module, a calculation control module and a driving module, obtains the length of the clothing through the calculation module, and is convenient for controlling the stretching length of the clothing, thereby preventing excessive stretching when the small code segment of clothing is replaced with the large code segment of clothing, thereby preventing the clothing from being damaged due to excessive stretching, and performs zoning control on the clothing of different code segments, thereby facilitating the control of the stretching length of the clothing of different code segments, thereby improving the sewing rate;

[0027] (3) By setting up a fast rebound control module, the driving motor is controlled to drive the moving seat to retract to the fast feeding stroke, thereby preventing the moving seat from rebounding to the initial position and increasing the rate of fixing the clothing;

[0028] (4) The photoelectric sensing module is set up to detect the starting and ending positions of the clothing, thereby improving the control accuracy of the feeding mechanism in fixing the clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a feeding adjustment mechanism of a sewing machine;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the first roller and the driving device;

[0031] Figure 3 It is a module schematic diagram of a feeding stretching length adjustment system;

[0032] Figure 4The figure is a flow chart of a feeding stretching length adjustment system. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0034] like Figure 1 to Figure 2 As shown, a feeding adjustment mechanism of a sewing machine of the present invention comprises a first roller 1 and a second roller 2 for feeding, and a driving device 3 for driving the first roller 1 to move. The first roller 1 is located on the right side of the feeding mechanism, and the second roller 2 is located on the left side of the feeding mechanism. The first roller 1 and the second roller 2 are used to fix the clothes. The driving device 3 for driving the first roller 1 is arranged at the first roller 1. The driving device 3 comprises a driving motor 31, a linear transmission mechanism 32 and a moving seat 33. In this embodiment, the linear transmission mechanism 32 comprises a belt transmission mechanism and a linear guide rail. The driving motor 31 drives the moving seat 33 to move along the linear guide rail through the belt transmission mechanism. The first roller 1 is installed above the moving seat 33. A torque sensor 34 for detecting the torsional moment value of the first roller 1 is arranged between the first roller 1 and the moving seat 33. The torque sensor 34 detects the torque value of the first roller 1 in real time. When the clothes are put on the first roller 1 and the second roller 2, the moving seat 33 drives the first roller 1 to move on the linear transmission mechanism 32, and the distance between the first roller 1 and the second roller 2 increases, so that the clothes are stretched. During the movement of the moving seat 33, the torque sensor 34 senses the torque of the first roller 1 relative to the moving seat 33 in real time, and sends a feedback signal to the control system, which controls the movement stroke of the drive motor 31 according to the feedback signal. During the initial operation, the distance between the first roller 1 and the second roller 2 is smaller than the opening of the clothes, so that the clothes can be put on the first roller 1 and the second roller 2; during operation, the control system controls the movement stroke of the drive motor 31, so that the distance between the first roller 1 and the second roller 2 becomes larger to stretch the clothes; when the tension of the clothes stretching reaches the set value of the tension between the first roller 1 and the second roller 2, that is, when the torque sensor 34 senses that the torque of the first roller 1 relative to the moving seat 33 reaches the set value, the control system controls the drive motor 31 to stop moving according to the feedback signal, and at this time, the distance between the first roller 1 and the second roller 2 reaches the optimal state of stretching the clothes, which is convenient for the next sewing operation. Embodiment 2

[0035] In order to better understand the technical content of the present invention, this embodiment describes the present invention in the form of a system structure. Figure 3 to Figure 4 As shown, a feeding stretching length adjustment system comprises:

[0036] A real-time torque storage module, used to read and store the value of the torque sensor 34 in real time;

[0037] A first setting module, used for receiving and storing a first setting value;

[0038] A first calculation control module compares the real-time torque sensor value with the first set value and outputs a comparison result;

[0039] The driving module sends a control command to the driving motor according to the output comparison result, and controls the driving motor to stop driving the moving seat when the real-time torque value reaches a first set value.

[0040] The sewing machine of this embodiment includes sewing operations for clothing materials such as collars, hems, and waistbands of pants. When the sewing machine is loading, that is, when the clothing materials are put on the first roller 1 and the second roller 2, the second roller 2 always keeps the initial position unchanged, and the driving module controls the driving device 3 to drive the moving seat 33 to move along the linear guide rail until the first roller 1 and the second roller 2 on the moving seat 33 stretch the clothing materials to a reasonable length.

[0041] When the movable seat 33 moves along the linear guide rail, the torque sensor 34 senses the torque of the first roller 1 relative to the movable seat 33 in real time, and the real-time torque storage module reads and stores the value of the torque sensor 34 in real time.

[0042] Since clothes of different materials have different elasticities, corresponding first setting values ​​can be set according to clothes of different materials. The first setting module receives and stores the corresponding input first setting values.

[0043] During the process of the first roller 1 and the second roller 2 stretching the clothes to the set length, the first calculation control module compares the value detected by the torque sensor 34 with the first set value in real time and outputs the comparison result. According to different comparison results, the drive module sends different control commands to the drive motor 31. When the value detected by the torque sensor 34 is less than the first set value, the drive module controls the drive motor 31 to drive the moving seat 33 to move horizontally to the right along the linear guide rail, and the first roller 1 and the second roller 2 continue to stretch the clothes. When the value detected by the torque sensor 34 reaches the first set value, the drive motor 31 is controlled to stop driving the moving seat 33 to move.

[0044] Furthermore, for clothing that requires multiple feeding and sewing operations, such as a top with a ribbed collar, it is necessary to first open the top opening and then put on the ribbed collar. Therefore, the system also includes a second setting module for receiving and storing a second setting value; a second calculation control module for comparing the real-time torque sensor value with the second setting value and outputting a comparison result; and a drive module for sending a control command to the drive motor according to the output comparison result, and when the real-time torque value reaches the second setting value, controlling the drive motor to stop driving the moving seat.

[0045] When the clothes to be used subsequently are put on the first roller 1 and the second roller 2 for the second time, the driving module controls the driving motor 31 to drive the moving seat 33 to continue to move along the linear guide rail, and the first roller 1 and the second roller 2 spread out the initial clothes and the subsequent clothes.

[0046] Since the elasticity of clothes of different materials is different, a corresponding second set value is set according to the subsequent clothes of different materials, and the second setting module receives the corresponding second set value input and stores it. The second set value is generally greater than the first set value. In the process of the first roller 1 and the second roller 2 simultaneously stretching the initial clothes and the subsequent clothes to a reasonable length, the second calculation control module compares the value of the real-time torque sensor 34 with the second set value and outputs the comparison result. According to different comparison results, the drive module sends different control commands to the drive motor 31.

[0047] When the value detected by the torque sensor 34 is less than the second set value, the driving module controls the driving motor 31 to drive the moving seat 33 to move horizontally to the right along the linear guide rail. When the value detected by the torque sensor 34 reaches the second set value, the driving motor 31 is controlled to stop driving the moving seat 33 to move. Since the three or more feeding conditions are the same as the two-time feeding operation condition, they will not be repeated in this embodiment.

[0048] Furthermore, the system also includes an alarm module, which presets a warning value to prevent the clothes from being over-stretched or under-stretched. The alarm module receives a first set value and a second set value. When one of the first set value or the second set value exceeds the warning value, it means that the clothes are over-stretched. The alarm module outputs an alarm signal to give an alarm prompt. When the value of the real-time torque sensor 34 is greater than the first set value or the second set value, the current torque device exerts excessive torque on the moving seat 33 of the first roller 1, so that the first roller 1 and the second roller 2 over-stretch the clothes, which exceeds the normal range of the clothes. The alarm module outputs an alarm signal, and the sewing machine gives an alarm prompt.

[0049] Furthermore, the system further includes a cloth material calculation module, which calculates and stores the total length of the cloth material. The total length calculation formula of the cloth material is as follows:

[0050]

[0051] In the formula, is the total length of the fabric, is the preset length, The moving distance of the moving seat 33 is different according to different sewing machines. Since the clothes are set between the first roller 1 and the second roller 2, the moving distance of the moving seat 33 is half of the stretched length of the clothes. The total length of the clothes is the sum of the preset length of the current sewing machine and twice the moving distance of the moving seat 33.

[0052] In order to avoid differences in sewing effects caused by measurement errors, the moving distance L of the moving seat is calculated according to the interval of the total length of the material. The interval range of L is 5mm to 15mm. In this embodiment, the value of L is based on an interval of 10mm. For example, when L is in the interval of 0 to 10mm, the total length of the clothes is calculated according to the average value of 5mm. When L is in the interval of 11 to 20mm, the total length of the clothes is calculated according to the average value of 15mm, and so on. According to the total length of the clothes calculated by the formula, different total lengths of clothes correspond to different clothes code segments, thereby completing the distinction of clothes code segments. The value of L can also be calculated according to an interval range of 5mm, 8mm or 15mm.

[0053] Furthermore, it also includes a code storage module and a quick control module. The code storage module encodes the total length of the clothes in the same interval into the same code and stores the code. When sewing clothes of different codes, it is only necessary to confirm the corresponding code and select it in the system. The system can directly perform stretching and fixing sewing operations without the need for secondary measurement.

[0054] When changing the code number, the operator presses the "Change Code" button, the quick control module reads the input code number, and compares it with the code number stored in the code number storage module to obtain the moving distance L of the moving seat 33 corresponding to the code number, without the need for secondary measurement and calculation, so that the quick control module controls the drive motor 31 to drive the moving seat 33 to move along the linear guide rail, and the first roller 1 on the moving seat 33 moves the corresponding moving distance L along the linear guide rail, directly completing the stretching of the clothes to improve work efficiency.

[0055] Furthermore, the system also includes a quick rebound control module. When the sewing machine is reloaded or needs to be loaded again, the quick rebound control module obtains the code number input at this time. According to the different code numbers of the fabrics, the quick rebound control module controls the drive motor 31 to drive the moving seat 33 to retract to the quick loading stroke, and the torque sensor 34 reads the torque value in real time. Among them, when the small size is changed to the large size, the quick rebound control module controls the drive motor 31 to keep the current position and stop, providing sufficient loading space to facilitate the direct loading operation of large-size clothes; when the large size is changed to the small size, the quick rebound control module controls the drive motor 31 to drive the moving seat 33 to retract to the quick loading stroke, the quick loading stroke is less than the moving distance L of the moving seat, and the quick loading stroke is between the preset length and the length of the small-size digital segment, to prevent the operator from forgetting to rebound the first roller 1 when changing the size, thereby preventing the small-size segment from being stretched excessively, causing the small-size clothes to be over-stretched and scrapped, and the quick rebound control module can reduce the driving distance of the secondary loading, reduce energy loss, increase the loading rate, and avoid repeated loading.

[0056] Furthermore, the system also includes a photoelectric sensing module. When the sewing machine is loading, the photoelectric sensing module detects the starting position and the ending position of the material. Since there is a relative bulge at the initial position of the material, the photoelectric sensing module determines that the bulge position of the material is in place and delays for 2 seconds. The driving device 3 starts to control the driving motor 31 to drive the moving seat 33 to drive the first roller 1 to move, and the distance between the first roller 1 and the second roller 2 increases, so that the material is stretched. When the photoelectric sensing module does not detect the starting or ending position of the material, the material is not placed in the correct position. The photoelectric sensing module transmits an alarm signal to the alarm module, and the sewing machine gives an alarm prompt. The operator starts to detect whether the material is correctly placed at the sewing machine, so as to improve the control accuracy of the feeding mechanism for fixing the material and prevent the sewing machine from making deviations when sewing the material.

[0057] To sum up, a feeding adjustment mechanism of a sewing machine of the present invention includes a first roller and a second roller for feeding, and a driving device for driving the first roller to move, the driving device includes a driving motor, a linear transmission mechanism and a moving seat; the first roller is installed on the moving seat, and a torque sensor for detecting the torque value of the first roller is provided between the first roller and the moving seat; the driving device controls the movement stroke of the moving seat according to the feedback signal of the torque sensor. A feeding stretching length adjustment system is also provided, including a real-time torque storage module, a setting module, a calculation control module and a drive module. Through the Modbus communication between the PLC and the torque sensor, the torque value of the torque sensor is monitored in real time. The setting value of the setting module and the real-time torque value of the real-time torque storage module are calculated by the calculation control module, and the drive module is controlled. The stretching control is automatically performed according to the torque value to ensure that each stretch is within the set range, which helps to improve the quality and consistency of the product. On this basis, a friendly user interface is also provided, so that the operator can easily set various parameters and view the real-time torque value and stretching length. Through automated control and parameter setting, the error caused by human operation is reduced and the qualified rate of the product is improved; and a code number storage module, a fast control module and a fast rebound control module are provided to distinguish the code segments of the clothing, and perform fast rebound control to increase the replacement speed of different materials and prevent damage to the clothing when replacing or adding clothing; the alarm module monitors the stretching state of the clothing according to different set values ​​to enhance the safety of sewing machine feeding.

[0058] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A feeding stretching length adjustment system, applied to a feeding adjustment mechanism of a sewing machine, the feeding adjustment mechanism comprising a first roller and a second roller for feeding, and a driving device for driving the first roller to move, characterized in that: The driving device includes a driving motor, a linear transmission mechanism and a moving seat; the first roller is installed on the moving seat, and a torque sensor for detecting the torsional moment value of the first roller is provided between the first roller and the moving seat; The driving device controls the movement stroke of the moving seat according to the feedback signal of the torque sensor; The system further comprises: A clothing material calculation module, which calculates and stores the total length of clothing material; A code number storage module, wherein the code number storage module encodes the total length of the clothing material in the same interval range into the same code number and stores the code number; A fast control module is used to read the input code number and compare it with the code number of the code number storage module to obtain the moving distance of the moving base corresponding to the code number, and control the driving motor to drive the moving base to move the corresponding moving distance; The fast rebound control module controls the driving motor to drive the moving seat to retract to the fast loading stroke after obtaining the input code number, and the fast loading stroke is smaller than the moving distance of the moving seat.

2. A feeding stretching length adjustment system according to claim 1, characterized in that: include: A real-time torque storage module is used to read and store the value of the torque sensor in real time; A first setting module, used for receiving and storing a first setting value; A first calculation control module compares the real-time torque sensor value with the first set value and outputs a comparison result; The driving module sends a control command to the driving motor according to the output comparison result, and controls the driving motor to stop driving the moving seat when the real-time torque value reaches a first set value.

3. A feeding stretching length adjustment system according to claim 2, characterized in that: include: A second setting module, used for receiving and storing a second setting value; A second calculation control module compares the real-time torque sensor value with the second set value and outputs a comparison result; The driving module sends a control command to the driving motor according to the output comparison result, and controls the driving motor to stop driving the moving seat when the real-time torque value reaches the second set value.

4. A feeding stretching length adjustment system according to claim 3, characterized in that: It also includes an alarm module, which presets a warning value and reads a first set value and a second set value. When the first set value or the second set value exceeds the warning value, the alarm module outputs an alarm signal.

5. A feeding stretching length adjustment system according to claim 2, characterized in that: The total length of the garment is calculated as follows: S=X+2L; Where S is the total length of the clothing, X is the preset length, and L is the moving distance of the moving seat.

6. A feeding stretching length adjustment system according to claim 5, characterized in that: The moving distance L of the moving seat is calculated based on the total length of the clothing material in intervals, and the interval range of L is 5 mm to 15 mm.

7. A feeding stretching length adjustment system according to claim 4, characterized in that: It also includes a photoelectric sensing module for detecting the starting and ending positions of the clothing material. When the photoelectric sensing module fails to detect the starting and ending positions, an alarm signal is transmitted to the alarm module.

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