Cloth roll tension control device of weaving machine

Abstract

A cloth roll tension control device of a loom belongs to the field of textile equipment. Cloth (11) bypasses the tension roller (7) and then is wound on the surface of the cloth roller (2), the two ends of a roller shaft of the cloth roller (2) are clamped in the limiting mechanisms on the corresponding sides, a driving roller (5) for driving the cloth roller (2) to rotate is arranged on the lower portion of the cloth roller (2), and a driving motor (6) drives the driving roller (5) to rotate. The output end of the distance sensor (3) is connected with the control system (4), and the control system (4) is connected with the driving motor (6) and regulates the rotating speed. In the tension control device for the cloth roll of the weaving machine, the height of the cloth roll is measured through the distance sensor, the diameter of the cloth roll is obtained, the rotating speed of the driving motor is further controlled through the control system, the tension applied to the tension roll is changed, and dynamic adjustment of the tension is further achieved.

Description

Technical Field

[0001] A loom cloth roll tension control device belongs to the field of textile equipment. Background Art

[0002] After the cloth is woven in the loom, it needs to be wound around a roller. During the conveying process of the cloth, it needs to pass through multiple rollers including a tension roller. During the conveying and final winding processes of the cloth, there will be a certain tension in itself. Due to the soft characteristics of textile fabrics, if the tension in the winding machine is abnormal, the cloth is prone to wrinkles, thus affecting the quality of the product. Therefore, during the conveying and winding processes of the cloth, it is necessary to control the tension roller to control the tension of the cloth to avoid problems such as wrinkles in the cloth.

[0003] Therefore, in the prior art, in the textile field and related fields, when conveying flexible and long materials such as similar cloth, for the control of tension, the commonly adopted solution is to first detect the tension through various sensors, and then adjust the tension. For the detection of tension, the commonly adopted solutions in the prior art are as follows:

[0004] The technical solution that indirectly reflects the tension according to the swing angle of the swing rod collected by the encoder adopted in the Chinese utility model patent with the application number 201820010811.3, the application date of January 4, 2018, and the patent name of "A Fiber Winding Unwinding Tension Control System"; the technical solution that directly detects the tension according to the output current of the tension ammeter adopted in the Chinese utility model patent with the application number 201821039225.8, the application date of July 2, 2018, and the patent name of "A Detection System for a Copper Clad Laminate Machine"; the technical solution that directly detects the tension according to the output current of the tension ammeter adopted in the Chinese utility model patent with the application number 201821039225.8, the application date of July 2, 2018, and the patent name of "A Detection System for a Copper Clad Laminate Machine"; the technical solution that indirectly reflects the tension by using the elastic force of a spring adopted in the Chinese utility model patent with the application number 202021635681.6, the application date of August 9, 2020, and the patent name of "A Tension Adjustment Component for a Winding Machine"; and the technical solution that controls the winding motor by obtaining the real-time torque through the initial parameters set by the PLC controller and the real-time coil diameter, and indirectly reflects the tension through fuzzy operation by introducing taper adopted in the Chinese utility model patent with the application number 202121475617.0, the application date of July 1, 2021, and the patent name of "A Non-indentation Variable Tension Winding Mechanism".

[0005] As for the adjustment of tension, the design idea in the prior art is: that is, to preset a set value for tension, then collect the tension value in real time, and then further increase or decrease the tension value by comparing the real-time value of tension with the set value. However, the applicant found that the existing tension adjustment scheme still causes cloth wrinkles when it is actually implemented in the textile field. After experiments, it was found that the reason is that in the process of rolling the cloth, the amount of cloth on the cloth roller at the starting point and the amount of cloth on the cloth roller at the end point in the rolling machine change in real time. This conversion of the amount (length) of cloth will affect the tension of the cloth during transmission. That is, the textile field generally falls into a misconception of thinking, that is, the tension of the cloth should be a constant during transmission.

[0006] Therefore, although the existing technologies including the above-mentioned technical solutions can also avoid defects such as wrinkles in fabrics to a large extent, they still cannot be completely avoided. Therefore, designing a technical solution that dynamically adjusts the tension of the fabric itself during the operation of the fabric to avoid wrinkles in the fabric has become a problem that needs to be urgently solved in this field. Utility Model Content

[0007] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a method for measuring the height of the cloth roller by a distance sensor to obtain the diameter of the cloth roller, so that the control system controls the rotation speed of the drive motor, changes the pulling force applied to the tension roller, and further realizes the dynamic adjustment of the tension, which effectively avoids the problem of cloth wrinkles still occurring when a fixed tension threshold is set in the prior art.

[0008] The technical solution adopted by the utility model to solve the technical problem is as follows: the cloth roll tension control device of the loom comprises a cloth roller and a tension roller, the cloth is wound around the tension roller and then wrapped around the surface of the cloth roller, limiting mechanisms are arranged at both ends of the cloth roller, both ends of the roller shaft of the cloth roller are clamped in the limiting mechanisms on the corresponding sides, a driving roller for driving the cloth roller to rotate is arranged at the lower part of the cloth roller, and the driving motor drives the driving roller to rotate, and is characterized in that a distance sensor for detecting the height of the cloth roller shaft is arranged, the distance sensor is directly opposite to the roller shaft of the cloth roller, the output end of the distance sensor is connected to the control system, and the control system is connected to the driving motor and adjusts the speed.

[0009] Preferably, the control system includes a controller and a frequency converter, the output end of the distance sensor is connected to the input end of the controller, the output end of the controller is connected to the frequency converter, the drive motor is a variable frequency motor, and the frequency converter is connected to the drive motor.

[0010] Preferably, a tension frame is provided, the tension roller is rotatably connected to one end of the tension frame, and the other end of the tension frame is rotatably mounted on the hinge seat.

[0011] Preferably, a spring seat is further provided on the side of the tension frame. One end of the spring is fixed on the spring seat, and the other end is hooked on the side of the tension frame.

[0012] Preferably, there are two spaced driving rollers. The cloth roller is arranged on the surfaces of the two driving rollers in a liftable manner. The cloth passes around the tension roller and then passes upward between the two driving rollers and is wound around the surface of the cloth roller.

[0013] Preferably, an angle sensor is provided at the rotating shaft of the tension frame and the hinge seat, and the output end of the angle sensor is connected to the control system.

[0014] Preferably, the limiting mechanism includes two spaced limiting rods, and the end of the roller shaft is clamped between the two limiting rods on the corresponding side.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In the cloth roll tension control device of the loom, by measuring the height of the cloth roller with a distance sensor, the diameter of the cloth roller is obtained, and further, the rotation speed of the driving motor is controlled by the control system to change the pulling force applied to the tension roller, further realizing the dynamic adjustment of the tension, effectively avoiding the problem that cloth wrinkles still occur when setting a fixed tension threshold in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the cloth roll tension control device of the loom.

[0018] Figure 2 It is a schematic block diagram of the control system principle of the cloth roll tension control device of the loom.

[0019] Wherein: 1. Limiting rod; 2. Cloth roller; 3. Distance sensor; 4. Control system; 5. Driving roller; 6. Driving motor; 7. Tension roller; 8. Spring; 9. Tension frame; 10. Hinge seat; 11. Cloth; 12. Angle sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Figures 1 - 2 It is the best embodiment of the present utility model. The following further describes the present utility model in conjunction with the attached Figures 1 - 2 drawings.

[0021] As Figure 1 shown, a cloth roll tension control device of a loom includes a cloth roller 2. Limiting rods 1 are respectively arranged at both ends of the cloth roller 2. Each end of the cloth roller 2 has two spaced limiting rods 1, and the end of the roller shaft of the cloth roller 2 is clamped between the two limiting rods 1 at the corresponding end. Through the limiting action of the two end limiting rods 1, the cloth roller 2 can only move up and down in the vertical direction.

[0022] On both sides of the bottom of the cloth roller 2, a driving roller 5 is respectively arranged, and the two driving rollers 5 are respectively attached to the surface of the cloth roller 2. The two driving rollers 5 are both driving rollers, and the rotation directions and speeds of the two driving rollers 5 are the same. The two driving rollers 5 jointly drive the cloth roller 2 to rotate. A driving motor 6 is arranged on the side of the two driving rollers 5, and the two driving rollers 5 are driven to rotate by the driving motor 6. The connection method between the driving motor 6 and the driving roller 5 belongs to the common knowledge in the art. For example, a speed reducer is installed at the output end of the driving motor 6, and the output shaft of the speed reducer drives the two driving rollers 5 to rotate through a transmission mechanism (such as a transmission belt). The speed reducer can also drive one of the driving rollers 5 to rotate through a transmission belt, and this driving roller 5 drives the other driving roller 5 to rotate through another belt.

[0023] The two driving rollers 5 are arranged at intervals, and a distance sensor 3 is arranged below the gap between the two driving rollers 5. The distance sensor 3 can be realized by a common laser rangefinder in the art. The distance sensor 3 is arranged at one end of the cloth roller 2, and the interval distance between the roller shafts of the cloth roller 2 is detected by the distance sensor 3.

[0024] A tension roller 7 is also arranged below the two driving rollers 5. The tension roller 7 is installed at one end of a tension frame 9, and the other end of the tension frame 9 is rotatably connected to a hinge seat 10. Under the combined action of the tension frame 9 and the hinge seat 10, the tension roller 7 is swingably arranged below the two driving rollers 5. An angle sensor 12 is also arranged at the rotating shaft of the tension frame 9 and the hinge seat 10, and the swing angle of the tension frame 9 is detected by the angle sensor 12. The angle sensor 12 can be realized by a common encoder in the art.

[0025] A spring seat is also arranged on the side of the tension frame 9. One end of a spring 8 is fixed on the surface of the spring seat, and the other end of the spring 8 is hooked on the side of the tension frame 9.

[0026] The cloth 11 extends upward after passing around the lower part of the tension roller 7, passes through between the two driving rollers 5, and then winds around the surface of the cloth roller 2.

[0027] A control system 4 is also arranged. The output ends of the above-mentioned distance sensor 3 and angle sensor 12 are connected to the control system 4, and the control system 4 is connected to the driving motor 6. Combined Figure 2 , the control system 4 includes a controller and an inverter. The controller can be realized by a well-known PLC in the art. The output ends of the distance sensor 3 and angle sensor 12 are connected to the input end of the controller, the output end of the controller is connected to the input end of the inverter, the driving motor 6 is a variable-frequency motor, and the output end of the inverter is connected to the driving motor 6.

[0028] The specific working process and working principle are as follows:

[0029] Based on the output value of the angle sensor 12, the controller can obtain the initial angle of the tension frame 9 at this time and can know the corresponding tension value of the tension roller 7 at this time. The two driving rollers 5 rotate driven by the driving motor 6, thereby driving the cloth roller 2 to rotate. Since the fabric 11 is wound around the surface of the cloth roller 2, as the cloth roller 2 rotates, the driving roller 5 contacts the fabric 11 and further drives the cloth roller 2 to rotate.

[0030] As the fabric 11 wound around the surface of the cloth roller 2 gradually increases, the diameter of the cloth roller 2 gradually increases. Due to the action of the limit rods 1 at both ends of the cloth roller 2, the roller shaft of the cloth roller 2 gradually rises, so the distance measured by the distance sensor 3 gradually increases. The distance sensor 3 sends the measured vertical distance to the controller in real time. As the diameter of the cloth roller 2 continues to increase, the controller controls the speed of the driving motor 6 to gradually decrease through the frequency converter. Therefore, the winding speed of the fabric 11 gradually decreases, so the pulling force of the fabric 11 on the tension roller 7 gradually decreases, and the pulling force of the tension frame 9 on the tension frame 9 under the action of the spring 8 also gradually decreases. Therefore, the tension provided by the tension roller 7 to the fabric 11 also gradually decreases, thus realizing the dynamic adjustment of the tension of the tension roller 7 on the fabric 11.

[0031] The above is only a preferred embodiment of the present invention and is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A loom cloth roll tension control device, comprising a cloth roll (2) and a tension roll (7). The cloth (11) bypasses the tension roll (7) and then winds around the surface of the cloth roll (2). Limiting mechanisms are arranged at both ends of the cloth roll (2), and both ends of the roller shaft of the cloth roll (2) are clamped in the corresponding side limiting mechanisms. A driving roll (5) for driving the cloth roll (2) to rotate is arranged below the cloth roll (2), and a driving motor (6) drives the driving roll (5) to rotate. It is characterized in that: A distance sensor (3) for detecting the height of the roller shaft of the cloth roller (2) is provided. The distance sensor (3) faces the roller shaft of the cloth roller (2), and the output end of the distance sensor (3) is connected to a control system (4). The control system (4) is connected to a drive motor (6) and regulates the rotational speed.

2. The loom cloth roll tension control device according to claim 1, characterized in that: The control system (4) includes a controller and an inverter. The output end of the distance sensor (3) is connected to the input end of the controller, the output end of the controller is connected to the inverter, the drive motor (6) is a variable-frequency motor, and the inverter is connected to the drive motor (6).

3. The loom cloth roll tension control device according to claim 1, characterized in that: A tension frame (9) is provided. The tension roller (7) is rotatably connected to one end of the tension frame (9), and the other end of the tension frame (9) is rotatably mounted at a hinge seat (10).

4. The loom cloth roll tension control device according to claim 3, wherein: A spring seat is further provided on the side of the tension frame (9). One end of a spring (8) is fixed to the spring seat, and the other end is hooked to the side of the tension frame (9).

5. The loom cloth roll tension control device according to claim 1, characterized in that: Two spaced drive rollers (5) are provided. The cloth roller (2) is arranged to be liftable on the surfaces of the two drive rollers (5). The cloth (11) passes around the tension roller (7) and then passes upward between the two drive rollers (5) and is wound around the surface of the cloth roller (2).

6. The loom cloth roll tension control device according to claim 3, characterized in that: An angle sensor (12) is provided at the rotating shaft of the tension frame (9) and the hinge seat (10). The output end of the angle sensor (12) is connected to the control system (4).

7. The loom cloth roll tension control device according to claim 3, characterized in that: The limiting mechanism includes two spaced limiting rods (1), and the end of the roller shaft is clamped between the two limiting rods (1) on the corresponding side.

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