A winding roller down-pressing device for adjusting the tension of a winding roller

Abstract

The utility model relates to the technical field of winding roller, concretely to a winding roller down -pressing device for adjusting the tension of winding roller, including winding mechanism, still including press roll, adjusting mechanism and support, the press roll is located winding mechanism on, and can slide up and down along winding mechanism, adjusting mechanism has two, respectively with press roll both ends connection, is used for driving press roll to move upwards, changes the pressure of press roll to winding mechanism, the support is located winding mechanism one side, is used for installing adjusting mechanism. The utility model discloses the combination of clever pulley block and counterweight, utilizes the gravity of counterweight to provide a constant lifting force for press roll. When the winding diameter of winding roller increases and lifts press roll, the counterweight will drop accordingly, and the press roll is pulled up through the pull rope and the pull belt, so that the pressure of the press roller on the winding roller is automatically maintained basically constant. This effectively avoids the tension fluctuation caused by the change of winding diameter, ensures the tension consistency inside and outside the material roll, and significantly improves the winding quality.

Description

Technical Field

[0001] This utility model relates to the field of winding roller technology, and in particular to a winding roller pressing device for adjusting the tension of winding rollers. Background Technology

[0002] In the production and processing of roll materials such as films, paper, and textiles, the winding process is a crucial step in ensuring the quality of the final product. Controlling the winding tension directly affects the uniformity of the roll's tension, the neatness of its end faces, and the absence of defects such as wrinkles, tensile deformation, and even breakage. Currently, common tension control methods include magnetic powder brake / clutch control and motor torque control. These methods primarily adjust the roll tension indirectly by controlling the rotational resistance or drive torque of the unwinding or winding rollers.

[0003] However, in practical applications, especially in situations where control precision and cost requirements are not high, the aforementioned electrical control systems suffer from problems such as complex structure, high cost, and the need for specialized knowledge for maintenance. Furthermore, during the winding process, as the roll diameter increases, even if the winding linear speed remains constant, changes in roll diameter will cause tension fluctuations. While traditional mechanical pressure roller devices are simple in structure, they often lack effective adaptive adjustment capabilities and cannot dynamically compensate for pressure changes caused by roll diameter variations. This can lead to the roll exhibiting an uneven distribution of tension, such as tightness on the inside and looseness on the outside, affecting winding quality. Therefore, there is an urgent need for a winding roller pressure device that is relatively simple in structure, low in cost, and can automatically adapt to changes in roll diameter to maintain constant downward pressure (thus indirectly controlling tension). Summary of the Invention

[0004] The main objective of this invention is to provide a winding roll pressing device for adjusting the tension of the winding roll, so as to solve the problems raised in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a winding roller pressing device for adjusting the tension of a winding roller is provided, comprising two support plates and an unwinding roller, and further comprising:

[0006] A take-up roller, which is rotatably mounted on a support plate and can move up and down along the support plate;

[0007] The adjustment mechanism consists of two mechanisms located on both sides of the support plate and connected to both ends of the take-up roller, which are used to drive the take-up roller to move upward.

[0008] There are two pressure rollers, both of which are rotatably mounted on the support plate and located on both sides below the winding roller. When the winding roller moves upward, the pressure between it and the pressure roller decreases.

[0009] Furthermore, the unwinding roller is rotatably mounted at one end of the support plate, and the winding roller is rotatably mounted at the other end of the support plate. The winding roller is used to wind up the roll material wound on the unwinding roller.

[0010] Furthermore, the support plate has a through guide groove at the part opposite to the take-up roller, and the take-up roller is slidably disposed in the guide groove.

[0011] Furthermore, the adjustment mechanism includes a tensioning component and a pressing component, wherein the tensioning component is used to pull the take-up roller upward, and the pressing component is used to press the tensioning component onto the take-up roller.

[0012] Furthermore, the pressing assembly includes a top plate, and a plurality of springs are fixedly provided on the lower surface of the top plate, with a pressure block fixedly connected to the bottom end of each spring.

[0013] Furthermore, the tensioning assembly includes a pulley block, an annular pull belt, a pull rope, and a counterweight. The pull belt and pull rope are fixedly connected, and the pull belt and pull rope pass around the pulley block, with one end connected to the winding roller and the other end attached to the counterweight.

[0014] Furthermore, the pulley assembly includes a movable pulley, a first fixed pulley, a second fixed pulley, and a third fixed pulley, and grooves are formed on the surfaces of the movable pulley, the first fixed pulley, the second fixed pulley, and the third fixed pulley.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Achieves constant pressure control and improves winding quality: This invention utilizes a clever combination of pulley blocks and counterweights, employing the weight of the counterweights to provide a constant lifting force to the pressure roller. When the winding roller's diameter increases, lifting the pressure roller, the counterweights descend accordingly, pulling the pressure roller upward via ropes and belts, dynamically adjusting the pressure roller's position, thereby automatically maintaining a essentially constant pressure from the pressure roller to the winding roller. This effectively avoids tension fluctuations caused by changes in roll diameter, ensuring consistent tension inside and outside the roll, and significantly improving winding quality.

[0017] 2. Simple and reliable structure, reducing manufacturing and maintenance costs: The core adjustment function of this device is achieved through a purely mechanical structure, eliminating the need for complex sensors, controllers, and actuators. This simple structure results in low manufacturing costs. Furthermore, the robust and durable mechanical structure has a low failure rate and is easy to maintain in daily use, reducing long-term maintenance costs and technical barriers.

[0018] 3. Stable installation and safe operation: The pressure component is designed to keep the pressure block pressed firmly in the groove of the movable pulley by the spring, which effectively prevents the pull belt from coming out of the pulley groove, ensuring the reliability and continuity of the transmission connection, and ensuring the stability and safety of the device operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the entire utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the entire utility model. Figure 2 ;

[0021] Figure 3 This is a partially enlarged schematic diagram of the present invention;

[0022] Figure 4 This is a top view of the present invention.

[0023] Figure label:

[0024] 1. Support plate; 2. Unwinding roller; 3. Pressure roller; 4. Rewinding roller; 5. Guide groove; 6. Support frame; 7. First motor; 8. Adjustment mechanism; 80. Counterweight; 81. Top plate; 82. Spring; 83. Pressure block; 84. Pull belt; 85. Pull rope; 86. Movable pulley; 87. First fixed pulley; 88. Second fixed pulley; 89. Third fixed pulley; 9. Second motor. Detailed Implementation

[0025] Example 1

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] This embodiment provides a winding roll pressing device for adjusting the tension of the winding roll, such as... Figure 1 and 2 As shown, it mainly includes a support plate 1, an unwinding roller 2, a pressure roller 3, a winding roller 4, two supports 6, and two adjusting mechanisms 8. The two supports 6 and the two adjusting mechanisms 8 are located on both sides of the support plate 1.

[0028] Two support plates 1 are arranged parallel to each other. At the front end between the two support plates 1, a unwinding roller 2 is rotatably mounted via bearings with reference to the material flow direction. At the rear end between the two support plates 1, a winding roller 4 and two pressure rollers 3 are rotatably mounted via bearings. The roll material to be processed is drawn from the unwinding roller 2, and after necessary processing or guidance, is wound up by the winding roller 4. A first motor 7 is fixedly mounted on the outside of the support plates 1. The output shaft of the first motor 7 is fixedly connected to the end of the unwinding roller 2, and is used to drive the unwinding roller 2 to rotate and release the roll material; Figure 4As shown, a second motor 9 is fixedly mounted on one end of the take-up roller 4. The output shaft of the second motor 9 is fixedly connected to the take-up roller 4. The motor housing of the second motor 9 is slidably connected to the corresponding support plate 1. A T-shaped block is fixedly provided on the outside of the motor housing. A T-shaped groove is opened at the corresponding position on the support plate 1 to accommodate the T-shaped block. The T-shaped block can slide back and forth in the T-shaped groove to prevent the second motor 9 from falling off the support plate 1. The output shaft of the second motor 9 is fixedly connected to the end of the take-up roller 4 and is used to drive the take-up roller 4 to rotate to wind up the material. At the same time, a convex shaft is fixedly provided at the corresponding position of the motor housing of the second motor 9 and the guide groove 5. The convex shaft extends out of the support plate 1 and is used to install the movable pulley 86 on this side. On each support plate 1, a vertical guide groove 5 is opened at the position corresponding to the take-up roller 4, penetrating the plate body.

[0029] The take-up roller 4 is horizontally positioned between the two support plates 1, with its two ends extending into the guide grooves 5 of the two support plates 1 respectively, and can slide up and down along the guide grooves 5. The function of the pressure roller 3 is to press against the take-up roller 4 from below. When the take-up roller 4 moves upward, its pressure on the pressure roller 3 decreases, thereby indirectly controlling the winding tension of the roll material.

[0030] The bracket 6 is fixedly installed on the outside of the support plate 1 to support and install the adjustment mechanism 8 described below. On the other side of the device, a similar set of adjustment mechanisms 8 and brackets 6 are symmetrically arranged to work together on both ends of the take-up roller 4 to ensure uniform pressure.

[0031] The adjusting mechanism 8 is the core of this utility model, and it includes a tensioning component and a pressing component. There are two adjusting mechanisms 8, which are respectively mounted on both sides via brackets 6, and together act on both ends of the pressure roller 3.

[0032] like Figure 3 As shown, the pressing assembly is mainly used to press the tensioning strap 84 in the tensioning assembly to prevent it from falling off. The pressing assembly includes a top plate 81 fixedly mounted on the upper part of the bracket 6. Several springs 82 are fixedly connected to the lower surface of the top plate 81, three of which are shown in the figure. The bottom ends of these springs 82 are all fixedly connected to a pressure block 83. The bottom surface of the pressure block 83 is designed to conform to the V-shaped or arc-shaped groove of the movable pulley 86.

[0033] The spring 82 is long enough and has sufficient elasticity, and the top plate 81 is higher than the upper end of the guide groove 5, ensuring that when the take-up roller 4 is located at the lower end of the guide groove 5, the pressure block 83 remains pressed in the groove of the movable pulley 86. At the same time, the take-up roller 4 can move upward to the top of the guide groove 5.

[0034] The tensioning assembly provides a constant lifting force and drives the take-up roller 4. It includes an annular pull belt 84, a pull rope 85, a counterweight 80, and a pulley system. The pulley system consists of a movable pulley 86, a first fixed pulley 87, a second fixed pulley 88, and a third fixed pulley 89. The surfaces of these pulleys are all provided with grooves to accommodate the pull belt 84 or pull rope 85, preventing deviation. One of the movable pulleys 86 on both sides is directly fixed to the end of the take-up roller 4, and the other is connected to the take-up roller 4 via a convex shaft outside the second motor 9. Therefore, the up-and-down movement of the take-up roller 4 directly drives the movable pulley 86 to move synchronously. The first fixed pulley 87 is mounted on the bracket 6 via a shaft, located below the movable pulley 86. The second fixed pulley 88 and the third fixed pulley 89 are also mounted on the bracket 6 at appropriate positions via shafts.

[0035] The connection relationship of each part of the tensioning assembly is as follows: The annular pull strap 84 is directly fitted onto the movable pulley 86. The pull rope 85 attached below the pull strap 84 goes down from the bottom of the first fixed pulley 87, then passes through the top of the second fixed pulley 88 and the third fixed pulley 89 in sequence, and finally connects to the counterweight 80. The first fixed pulley 87 is located below the movable pulley 86, and the length of the pull strap 84 is always less than the distance between the movable pulley 86 and the first fixed pulley 87, ensuring that only the pull rope 85 passes over the first fixed pulley 87, preventing the lower end of the pull strap 84 from falling off after passing over the first fixed pulley 87. Lifting the pressure block 83 upwards causes the spring 82 to contract, fitting the pull strap 84 into the groove of the movable pulley 86. Releasing the pressure block 83 causes the spring 82 to rebound, pressing the pressure block 83 against the groove of the movable pulley 86. The pull rope 85 is preferably a high-strength steel wire rope. One end is fixedly connected to the pull belt 84, then it passes downwards around the bottom of the first fixed pulley 87, and then successively around the top of the second fixed pulley 88 and the third fixed pulley 89, with a counterweight 80 attached to its final end. The mass of the counterweight 80 needs to be precisely calculated and selected based on the required constant downward pressure value. The lengths of the pull belt 84 and the pull rope 85 are precisely calculated to ensure that the counterweight 80 is suspended in the air when the pressure roller 3 moves to the upper and lower ends of the guide groove 5.

[0036] The assembly and working principle of the device are as follows:

[0037] During installation, first lift the pressure block 83 upwards to compress the spring 82, then slip the pull belt 84 onto the movable pulley 86. After releasing the pressure block 83, the spring 82 rebounds, pushing the pressure block 83 firmly against the groove of the movable pulley 86, confining the pull belt 84 within the groove and effectively preventing it from coming out during operation. In the initial state, the counterweight 80 is suspended in the air, and a constant upward pulling force is applied to the take-up roller 4 through the pull rope 85, the pull belt 84, and the movable pulley 86. The difference between the sum of this pulling force and the supporting force of the pressure roller 3 on the take-up roller 4, and the weight of the take-up roller 4 itself, is the pressure exerted on the take-up roller 4. As the roll material is wound up, the diameter of the winding roller 4 increases, the supporting force of the pressure roller 3 on the winding roller 4 increases, the tension on the pull rope 85 decreases, the counterweight 80 moves down, pulls the pull rope 85, causing the winding roller 4 to move up, reducing the pressure between the winding roller 4 and the pressure roller 3, thereby adjusting the tension of the winding roller 4.

[0038] When winding begins, the diameter of the roll material on the take-up roller 4 is small. Under the tension of the counterweight 80, the take-up roller 4 is positioned relatively low in the guide groove 5, and an initial pressure is applied to the take-up roller 4. As winding progresses, the diameter of the roll material on the take-up roller 4 gradually increases, pressing down on the pressure roller 3. If the position of the take-up roller 4 remains fixed, its pressure on the roll material will increase significantly. However, in this invention, when the roll material presses against the pressure roller 3, the take-up roller 4 tends to move the movable pulley 86 upwards, causing the pull belt 84 and pull rope 85 to loosen, reducing the tension on the counterweight 80. Therefore, the counterweight 80 descends under its own weight, immediately tightening the entire system through the pull rope 85, causing the movable pulley 86 and the take-up roller 4 to move upwards synchronously as the roll material diameter increases. This is a dynamic balancing process, resulting in the pressure of the pressure roller 3 on the roll material on the take-up roller 4 remaining essentially constant throughout the entire winding process, thus achieving constant tension winding. The length and elastic coefficient of the spring 82 are designed to ensure that the pressure block 83 can always effectively press against the movable pulley 86 throughout the entire process of the winding roller 4 running from the lowest point to the highest point in the guide groove 5.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A winding roll pressing device for adjusting the tension of a winding roll, comprising two support plates (1) and an unwinding roll (2), characterized in that, Also includes: The winding roller (4) is rotatably mounted on the support plate (1) and can move up and down along the support plate (1); Adjustment mechanism (8), there are two adjustment mechanisms (8), which are located on both sides of the support plate (1) and connected to both ends of the take-up roller (4) respectively, for driving the take-up roller (4) to move upward; There are two pressure rollers (3), both of which are rotatably mounted on the support plate (1) and located on both sides below the winding roller (4). When the winding roller (4) moves upward, the pressure between it and the pressure roller (3) decreases.

2. The winding roll pressing device for adjusting the tension of the winding roll according to claim 1, characterized in that, The unwinding roller (2) is rotatably disposed at one end of the support plate (1), and the winding roller (4) is rotatably disposed at the other end of the support plate (1). The winding roller (4) is used to wind up the roll material wound on the unwinding roller (2).

3. The winding roll pressing device for adjusting the tension of the winding roll according to claim 2, characterized in that, The support plate (1) has a through guide groove (5) at the part opposite to the take-up roller (4), and the take-up roller (4) is slidably disposed in the guide groove (5).

4. The winding roll pressing device for adjusting the tension of the winding roll according to claim 3, characterized in that, The adjustment mechanism (8) includes a tensioning component and a pressing component. The tensioning component is used to pull the take-up roller (4) upward, and the pressing component is used to press the tensioning component onto the take-up roller (4).

5. The winding roll pressing device for adjusting the tension of the winding roll according to claim 4, characterized in that, The pressing assembly includes a top plate (81), and a plurality of springs (82) are fixedly provided on the lower surface of the top plate (81). A pressure block (83) is fixedly connected to the bottom end of the springs (82).

6. The winding roll pressing device for adjusting the tension of the winding roll according to claim 5, characterized in that, The tensioning assembly includes a pulley block, an annular pull belt (84), a pull rope (85), and a counterweight (80). The pull belt (84) and the pull rope (85) are fixedly connected. The pull belt (84) and the pull rope (85) pass around the pulley block, with one end connected to the winding roller (4) and the other end attached to the counterweight (80).

7. The winding roll pressing device for adjusting the tension of the winding roll according to claim 6, characterized in that, The pulley assembly includes a movable pulley (86), a first fixed pulley (87), a second fixed pulley (88), and a third fixed pulley (89). Grooves are provided on the surfaces of the movable pulley (86), the first fixed pulley (87), the second fixed pulley (88), and the third fixed pulley (89).

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