Terry cloth edging machine cloth feeding and rectifying device

Abstract

The utility model belongs to towel cloth processing equipment technical field discloses a kind of towel cloth overlock machine cloth rectifying device. Rectifying device includes first adjustable guide roller and second adjustable guide roller;First adjustable guide roller both ends are equipped with first rotating arm;The end of first rotating arm away from first adjustable guide roller is rotatably assembled in side plate;First rotating arm and side plate are equipped with first elastic member between for providing elastic torsion force, so that first rotating arm has rotating tendency;Second adjustable guide roller both ends are equipped with second rotating arm;Both ends are equipped with second rotating arm, and the end of second rotating arm away from second adjustable guide roller is rotatably assembled in side plate;Second rotating arm and side plate are equipped with second elastic member between for providing elastic torsion force, so that second rotating arm has rotating tendency. First adjustable guide roller and second adjustable guide roller provide elastic force by torsion spring, can automatically adjust guide roller angle and tension according to the gram weight, thickness and elasticity of cloth, avoid cloth excessive stretching or relaxation, and have higher adaptability to various material specifications of cloth.

Description

Technical Field

[0001] This utility model belongs to the technical field of towel fabric processing equipment, specifically relating to a towel fabric edge banding machine feeding and correction device. Background Technology

[0002] In existing automatic towel sewing equipment, the correction device is typically used to correct the fabric position during the feeding process to ensure sewing accuracy. For example, CN207891548U discloses a correction device that uses baffles and photoelectric sensors on both sides of the fabric holder to detect whether the fabric edge is off-center, and drives the fabric holder to move left and right via a drive screw motor to achieve correction. However, this device only uses a single or fixed photoelectric sensor, and the correction mechanism lacks adaptive adjustment capability for fabric tension, resulting in poor adaptability to fabrics of different weights, thicknesses, or elasticities. Especially when handling highly elastic or ultra-thin towel fabrics, uneven correction force or sensor detection lag can easily cause fabric stretching, deformation, or a decrease in correction accuracy. Therefore, it is necessary to provide a more flexible, stable, and adaptable fabric feeding correction device to improve the automation level and production efficiency of towel fabric overlock machines. Utility Model Content

[0003] The purpose of this invention is to provide a fabric feeding and correction device for a terry cloth binding machine that is adaptable to fabrics of different weights, thicknesses, or elasticities.

[0004] To achieve the above objectives, the technical solution specifically provided by this utility model is as follows: A fabric feeding and correction device for a towel fabric binding machine includes a correction frame that can move along the width of the fabric. The correction frame includes a pair of side plates and a plurality of parallel guide rollers disposed between the side plates. It also includes a first adjustable guide roller and a second adjustable guide roller disposed parallel to the guide rollers. The first adjustable guide roller is disposed on the fabric feeding side of the correction frame, and both ends are provided with first rotating arms; the end of the first rotating arm away from the first adjustable guide roller is rotatably mounted on the side plate; a first elastic element is provided between the first rotating arm and the side plate to provide elastic force so that the first rotating arm has a rotation tendency; The second adjustable guide roller is located on the fabric output side of the correction frame, and both ends are provided with second rotating arms; the end of the second rotating arm away from the second adjustable guide roller is rotatably mounted on the side plate; a second elastic element is provided between the second rotating arm and the side plate to provide elastic torsional force so that the second rotating arm has a rotational tendency.

[0005] In this invention, the first adjustable guide roller (on the fabric feeding side) and its first elastic element (such as a torsion spring) act as a "sensor" and a "buffer." When thicker or less elastic fabric enters, it generates significant resistance on the guide roller, pushing the first rotating arm to rotate against the force of the first elastic element. This rotation process absorbs excess fabric feeding tension, preventing the fabric from being forcibly stretched. The second adjustable guide roller (on the fabric output side) and its second elastic element (such as a torsion spring) act as a "stabilizer." It continuously applies an appropriate, variable tension to the fabric through the torsional force provided by the elastic element. If the fabric is too thin or slippery, the tension effectively prevents it from loosening and slipping; if the fabric is too thick, the guide roller will be pushed back, and the tension will automatically decrease, avoiding excessive stretching.

[0006] Thus, the first and second adjustable guide rollers, through torsion springs, provide elastic force, automatically adjusting the roller angle and tension according to the fabric's weight, thickness, and elasticity to prevent excessive stretching or loosening of the fabric. The first guide roller is responsible for pre-adjusting the tension on the fabric feeding side, while the second guide roller is responsible for stabilizing the tension on the fabric output side, forming a tension balance system. This ensures that the fabric maintains stable operation throughout the correction process, making the correction device highly adaptable to fabrics of various material specifications and increasing its versatility.

[0007] Furthermore, the first and second elastic elements provide elastic torsional forces in opposite directions. These opposing forces allow the forces exerted on the fabric to mutually restrain and balance each other. The fabric forms a dynamically stable tension zone between the two guide rollers. Regardless of changes in fabric characteristics, the system automatically finds a new equilibrium point, ensuring that the fabric remains in a moderately taut, flat, and stable state when entering the subsequent hemming process. This is a prerequisite for achieving high-precision deviation correction.

[0008] Furthermore, both the first and second elastic elements are torsion springs. Compared with other types of elastic elements (such as compression springs, tension springs, and leaf springs), torsion springs have irreplaceable advantages in this application scenario: the torque of the torsion spring can be directly and completely converted into a rotational force on the rotating arm, allowing for very precise control; the torsion spring can be tightly fitted onto the connecting shaft between the rotating arm and the side plate without occupying extra space, making the entire alignment frame structure very compact and avoiding the bulky mechanism caused by using large elastic elements.

[0009] Furthermore, each of the first and second adjustable guide rollers is equipped with a pair of limiting rings. The distance between the two limiting rings is adjusted to match the width of the terry cloth to be processed, forming a transverse limiting channel for the fabric to pass through, restricting the fabric to move only within a fixed width range. Consequently, because the fabric is strictly restricted to a preset position, it ensures that its edge always reaches the same position of the photoelectric sensor detection point. This makes the sensor's detection signal real and accurate, providing a reliable data foundation for subsequent high-precision correction.

[0010] Furthermore, it also includes: A pair of photoelectric sensors are used to detect the position of the edge of the terry cloth; A pair of limit switches are used to limit the movement range of the alignment frame; And drive components used to provide driving force and drive the alignment frame to move.

[0011] Furthermore, it also includes a sliding frame; the sliding frame includes a pair of upright plates and a plurality of guide rods connecting the two upright plates; the side plate is disposed between the two upright plates, and the guide rods are disposed through the side plate; the driving component includes a lead screw and a motor connected to the lead screw drive.

[0012] Furthermore, it also includes a pair of guide sleeves disposed on the fabric outlet side of the correction frame; the guide sleeves have V-shaped openings for the towel fabric to pass through, and the openings of the two guide sleeves are arranged opposite to each other.

[0013] Between the last guide roller and the presser foot of the sewing machine, a section of fabric is suspended in the air. This section is most susceptible to swaying or deviation due to external airflow, inertia, or its own elasticity. Furthermore, the movement of the guide frame is a dynamic process that may produce slight overshoot or oscillations. Therefore, even at the moment the fabric is about to leave the guide frame and enter the sewing machine, a slight deviation may still occur.

[0014] This invention utilizes a pair of guide sleeves to provide final, mandatory, precise guidance and stabilization of the fabric at the very last moment before it enters the sewing process. The V-shaped opening of the guide sleeves forms a gradually narrowing channel. Regardless of the slight deviation of the fabric when it contacts the V-shaped opening, it is gradually and smoothly "pushed" towards the center bottom of the V-shape—the preset correct path—guided by the V-shaped slope, achieving a progressive automatic centering effect. Simultaneously, the progressive contact between the V-shaped opening's slope and the fabric effectively reduces the risk of the fabric edges getting stuck or causing severe scratching of the loops, making it particularly suitable for soft, looped materials like terry cloth.

[0015] Furthermore, the guide sleeve includes a base plate portion, a top plate portion, and a connecting portion away from the opening side of the guide sleeve, the connecting portion being used to connect the base plate portion and the top plate portion to form an integral whole.

[0016] The base plate, top plate, and connecting parts together form a stable triangular or box-shaped frame structure with extremely high bending and torsional stiffness. During long-term use, even under continuous lateral pressure from the fabric, the guide sleeve effectively resists deformation, maintaining the original shape and size of the V-shaped opening, thus ensuring the durability and stability of guiding accuracy. The fabric only contacts the smooth inclined surface as it passes through, avoiding scratches, snagging, or obstruction from any bolt heads, welds, or joints, minimizing fabric damage that may be caused by friction with the guide sleeve.

[0017] Furthermore, the top plate is in the shape of a right-angled trapezoid, with its hypotenuse facing the correction frame, which allows the fabric, especially soft terry cloth, to be guided into the V-shaped channel very smoothly and naturally, greatly reducing the resistance and potential damage during introduction.

[0018] Furthermore, it also includes a mounting beam with a strip-shaped mounting groove along its length; a mounting base plate is fixedly mounted on the bottom of the guide sleeve, and the mounting base plate is fixed to the mounting groove by adjustable bolts. The fabric passes through the pair of guide sleeves. The width of this channel can be precisely matched to the width of the fabric by adjusting the relative distance between the two guide sleeves, thereby providing a final and precise lateral limit for the fabric and completely eliminating the last bit of lateral freedom before the fabric exits.

[0019] This utility model has the following beneficial effects: The core of this invention lies in a dynamic tension balance zone composed of elastic guide rollers; in the preferred embodiment, a V-shaped guide system with progressive centering function is set up to solve the problems of tension control and precision control in the correction process. Attached Figure Description

[0020] Figure 1 This is a top view schematic diagram of the fabric feeding and correction device of the towel fabric binding machine in this embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the fabric feeding and correction device of the towel fabric binding machine in this embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This is a schematic diagram of the guide sleeve in an embodiment of the present utility model; Figure 5 This is a diagram illustrating the working condition of the fabric feeding and correction device of the towel fabric binding machine in this embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Frame; 11. Photoelectric sensor; 111. Sensor mounting bracket; 112. Sensor mounting base; 12. Limit switch; 121. Fixed base; 2. Sliding frame; 21. Vertical plate; 22. Guide rod; 3. Correction frame; 31. Guide roller; 32. Side plate; 33. Fabric infeed side; 34. Fabric outfeed side; 4. First adjustable guide roller; 41. First rotating arm; 5. Second adjustable guide roller; 51. Second rotating arm; 6. Limiting ring; 7. Guide sleeve; 71. Base plate; 72. Top plate; 73. Connecting part; 74. Pad; 75. Mounting beam; 751. Mounting groove; 752. Adjustable bolt; 76. End seat; 761. Rib plate; 8. Motor; 81. Lead screw. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this utility model, the present application will be further described in detail below with reference to the accompanying drawings.

[0023] A fabric feeding and correction device for a terry cloth edge binding machine, referring to Figure 1 and Figure 2 The system includes a sliding frame 2 and a straightening frame 3 mounted on the platform of the frame 1. The sliding frame 2 includes a pair of upright plates 21 and guide rods 22. The upright plates 21 are vertically fixed to the platform of the frame 1, and the guide rods 22 are distributed at the four corners of the upright plates 21, fixing the two upright plates 21 together. The straightening frame 3 includes a pair of side plates 32 and several guide rollers 31. The two side plates 32 are spaced apart and located between the two upright plates 21. The two ends of the guide rollers 31 are connected to the two side plates 32 respectively. The guide rods 22 pass through the side plates 32, allowing the straightening frame 3 to slide along the length direction (fabric width direction) of the guide rods 22.

[0024] Reference Figure 1 , Figure 2 and Figure 3 The fabric feeding and correction device of the terry cloth overlock machine also includes a driving component for providing driving force and driving the sliding frame 2 to slide. Specifically, the driving component includes a motor 8 mounted on a side plate 32, with a lead screw 81 connected to the output end of the motor 8; the lead screw 81 passes through the side plate 32 and the upright plate 21 in sequence, and a mating component for the lead screw 81 is installed on the corresponding upright plate 21. Thus, when the motor 8 outputs power, the lead screw 81 rotates, thereby driving the correction frame 3 to slide along the guide rod 22, thereby adjusting the fabric position. In other embodiments, the driving component can also be other known driving components that can provide linear driving force, such as hydraulic cylinders or pneumatic cylinders, which will not be described in detail here.

[0025] Reference Figure 1 , Figure 2 and Figure 3The fabric feeding side 33 of the correction frame 3 is provided with a first adjustable guide roller 4. The first adjustable guide roller 4 is arranged parallel to the guide roller 31, and each end is provided with a first rotating arm 41; the other end of the first rotating arm 41 is rotatably mounted to the side plate 32 via a rotating shaft. A first elastic element (not shown in the figure) is provided between the side plate 32 and the first rotating arm 41 to provide an elastic torsional force, so that the first rotating arm 41 has a rotational tendency. In this embodiment, the first elastic element is a torsion spring, and the specific installation method of the torsion spring is well known to those skilled in the art and will not be described in detail here. The fabric output side 34 of the correction frame 3 is provided with a second adjustable guide roller 5. The second adjustable guide roller 5 is arranged parallel to the guide roller 31, and each end is provided with a second rotating arm 51; the other end of the second rotating arm 51 is rotatably mounted to the side plate 32 via a rotating shaft. A second elastic element (not shown in the figure) is provided between the side plate 32 and the second rotating arm 51 to provide an elastic torsional force, so that the second rotating arm 51 has a rotational tendency. Similar to the first elastic element, the second elastic element is also a torsion spring, but the difference is that the elastic torsional forces provided by the two are in opposite directions. When the fabric is processed by the first adjustable guide roller 4 and the second adjustable guide roller 5, both can adapt to the fabric tension under the action of the torsion spring.

[0026] Reference Figure 2 , Figure 3 and Figure 4 A mounting beam 75 is provided on the fabric outlet side 34 of the correction frame 3, and the mounting beam 75 is arranged parallel to the guide roller 31. L-shaped end seats 76 are fixed at both ends of the mounting beam 75, and triangular ribs 761 are provided on the end seats 76. The end seats 76 are detachably fixed to the frame 1 by bolts. A mounting groove 751 is formed on the top surface of the mounting beam 75 along its length. A pair of position-adjustable guide sleeves 7 are fitted inside the mounting groove 751.

[0027] Reference Figure 2 , Figure 3 and Figure 4 The guide sleeve 7 is formed by bending a metal plate and includes a rectangular plate-shaped base plate portion 71, a right-angled trapezoidal top plate portion 72, and a U-shaped connecting portion 73 connecting the two on one side. The inclined edge of the top plate portion 72 faces the straightening frame 3, and the guide sleeve 7 has a V-shaped opening that gradually widens away from the connecting portion 73. The openings of the two guide sleeves 7 are arranged opposite each other. The apex corners and edges of the base plate portion 71 and the top plate portion 72 are rounded to minimize the possibility of snagging and thus effectively reduce the risk of damaging the fabric. A pad 74 is fixed to the bottom surface of the guide sleeve 7, and the pad 74 is installed in the mounting groove 751 by an adjustable bolt 752. In this way, the relative distance between the two guide sleeves 7 can be adjusted according to the width of the terry cloth being processed.

[0028] Reference Figure 2 , Figure 3 and Figure 5A pair of photoelectric sensors 11 are also installed on the frame 1, located inside the correction frame 3. A sensor mounting base 112 is fixed on the frame 1, and a sensor mounting bracket 111 is fixed on the top of the sensor mounting base 112. The photoelectric sensors 11 are fixed to the top of the sensor mounting bracket 111. The set distance between the two photoelectric sensors 11 is approximately equal to the width of the towel fabric to be processed. Thus, when the fabric deviates, the signal detected by the photoelectric sensors 11 can control the drive component to work, causing the correction frame 3 to move to correct the fabric deviation.

[0029] Reference Figure 2 , Figure 3 and Figure 4 A fixing seat 121 is also provided between the straightening frame 3 and the mounting beam 75, near one of the side plates 32. The fixing seat 121 is equipped with a pair of limit switches 12. The limit switches 12 are distributed on both sides of the side plate 32, so that the maximum travel of the straightening frame 3 can be limited by the limit switches 12.

[0030] Reference Figure 2 , Figure 3 and Figure 5 The number and position of the guide rollers 31 can be adjusted as needed. Specifically, when using the fabric feeding and correction device of the towel fabric overlay machine in this embodiment, the number of guide rollers 31 around which the fabric passes can be selected as needed to ensure that the fabric runs with appropriate tension. Figure 5 The diagram illustrates one possible fabric feeding method. When thicker or less elastic fabric enters, it generates significant resistance on the guide roller, causing the first rotating arm 41 to rotate against the force of the first elastic element. This rotation absorbs excess fabric feeding tension, preventing the fabric from being forcibly stretched. The second adjustable guide roller 5 (fabric outlet side 34) and its second elastic element (such as a torsion spring) act as a "stabilizer." It continuously applies an appropriate, variable tension to the fabric through the torsional force provided by the elastic element. If the fabric is too thin or slippery, the tension effectively prevents it from loosening and slipping; if the fabric is too thick, the guide roller is pushed back, and the tension automatically decreases, avoiding excessive stretching.

[0031] The fabric passes through a pair of guide sleeves 7 between the last guide roller and the presser foot of the sewing machine. The V-shaped opening of the guide sleeves 7 forms a gradually narrowing channel. Regardless of the slight deviation of the fabric when it contacts the V-shaped opening, it will be gradually and smoothly "pushed" towards the center bottom of the V-shape—that is, the preset correct path—under the guidance of the V-shaped slope, resulting in a progressive automatic centering effect.

[0032] The working principle of this invention is as follows: During the entire correction process, the first adjustable guide roller 4 on the fabric feeding side 33 and the second adjustable guide roller 5 on the fabric output side 34 automatically swing under the action of torsion springs in opposite directions, forming a dynamic tension balance zone. This zone can adapt to different fabric thicknesses and elasticities, automatically absorb or compensate for changes in fabric tension, and prevent the fabric from being overstretched or slack during the correction action, ensuring that the correction is carried out under the premise of stable fabric tension. After correction and tension adjustment, the fabric passes through a pair of V-shaped guide sleeves 7 before exiting the fabric.

[0033] The tapered V-shaped opening of the guide sleeve 7 will make a final fine adjustment to the fabric, and use its inclined structure to automatically guide the fabric to the center preset path, eliminating any residual minor deviations and ensuring that the fabric enters the sewing station in a more accurate position and posture.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fabric feeding and correction device for a terry cloth binding machine, comprising a correction frame (3) movable along the width of the fabric, the correction frame (3) comprising a pair of side plates (32) and a plurality of parallel guide rollers (31) disposed between the side plates (32), characterized in that: It also includes a first adjustable guide roller (4) and a second adjustable guide roller (5) arranged parallel to the guide roller (31); The first adjustable guide roller (4) is disposed on the fabric feeding side (33) of the correction frame (3), and both ends are provided with first rotating arms (41); the end of the first rotating arm (41) away from the first adjustable guide roller (4) is rotatably mounted on the side plate (32); a first elastic element is provided between the first rotating arm (41) and the side plate (32) to provide elastic force so that the first rotating arm (41) has a rotation tendency; The second adjustable guide roller (5) is located on the fabric output side (34) of the correction frame (3), and both ends are provided with second rotating arms (51); the end of the second rotating arm (51) away from the second adjustable guide roller (5) is rotatably mounted on the side plate (32); a second elastic element is provided between the second rotating arm (51) and the side plate (32) to provide elastic torsional force so that the second rotating arm (51) has a rotational tendency.

2. The fabric feeding and correction device for the terry cloth overlock machine according to claim 1, characterized in that: The first and second elastic elements provide elastic torsional forces in opposite directions, respectively.

3. The fabric feeding and correction device for the terry cloth binding machine according to claim 2, characterized in that: Both the first and second elastic elements are torsion springs.

4. The fabric feeding and correction device for the terry cloth overlock machine according to claim 2, characterized in that: A pair of limiting rings (6) are provided on the first adjustable guide roller (4) and the second adjustable guide roller (5).

5. The fabric feeding and correction device for a terry cloth edge-wrapping machine according to claim 2, characterized in that, Also includes: A pair of photoelectric sensors (11) are used to detect the position of the edge of the terry cloth; A pair of limit switches (12) are used to limit the movement range of the alignment frame (3); And driving components for providing driving force and driving the alignment frame (3) to move.

6. The fabric feeding and correction device for a terry cloth overlock machine according to claim 5, characterized in that: It also includes a sliding frame (2); the sliding frame (2) includes a pair of upright plates (21) and a number of guide rods (22) connecting the two upright plates (21); the side plate (32) is disposed between the two upright plates (21), and the guide rods (22) are disposed through the side plate (32); the driving component includes a lead screw (81) and a motor (8) that is driven by the lead screw (81).

7. The fabric feeding and correction device for a terry cloth overlock machine according to any one of claims 1-6, characterized in that: It also includes a pair of guide sleeves (7) disposed on the fabric outlet side (34) of the correction frame (3); the guide sleeves (7) have V-shaped openings for the towel fabric to pass through, and the openings of the two guide sleeves (7) are arranged opposite to each other.

8. The fabric feeding and correction device for a terry cloth overlock machine according to claim 7, characterized in that: The guide sleeve (7) includes a base plate portion (71), a top plate portion (72), and a connecting portion (73) away from the opening side of the guide sleeve (7). The connecting portion (73) is used to connect the base plate portion (71) and the top plate portion (72) to form an integral unit.

9. The fabric feeding and correction device for a terry cloth overlock machine according to claim 8, characterized in that: The top plate (72) is in the shape of a right trapezoidal plate, and its hypotenuse faces the correction frame (3).

10. The fabric feeding and correction device for a terry cloth overlock machine according to claim 7, characterized in that: It also includes a mounting beam (75), on which a strip-shaped mounting groove (751) is opened along the length direction; a mounting base plate is fixedly provided at the bottom of the guide sleeve (7), and the mounting base plate is fixed to the mounting groove (751) by an adjustable bolt (752).

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