Protective longitudinal scutching device

Abstract

The utility model discloses a protection type longitudinal scutching device, which belongs to the technical field of textile printing and dyeing, and comprises a front roll shaft group and a rear roll shaft group, the front roll shaft group comprises an upper roll shaft and a lower roll shaft, the upper roll shaft and the lower roll shaft enable cloth to be in a clamping and conveying state, the upper roll shaft is connected with a speed reducer and a first servo motor, and the lower roll shaft is connected with a second servo motor. The rear roll shaft set comprises a first roll shaft and a second roll shaft, the first roll shaft and the second roll shaft enable the cloth to be in a clamping and conveying state, the first roll shaft is connected with a speed reducer and a second servo motor, and the rotating speed of the first roll shaft is larger than that of the upper roll shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of textile printing and dyeing tentering machines, in particular to a protective longitudinal width opening device. Background Art

[0002] When printing and dyeing fabrics, they usually need to be cleaned, dehydrated and dried. Currently, fabrics are first dehydrated after cleaning. After dehydration, the fabrics are easily twisted into ropes. Therefore, before the next process, the fabrics need to be untwisted and opened by a width-opening machine to unfold the fabrics into sheets. However, this method of dehydrating first and then opening the width cannot remove the wrinkles left on the fabric due to cleaning and dehydration. In the subsequent drying process of the fabric, an additional fabric flattening device needs to be added, which increases the equipment cost and production process. In addition, due to the influence of the fabric material, the final flattening effect of different fabrics is also different.

[0003] A stenter is a device used in textile printing and dyeing factories that stretches the fabric and makes it uniform in width in the weft direction by heating and applying tension on both sides. Existing stenters usually use a needle plate structure to apply force and pull outward. Even if the stitches are fine and dense, longitudinal ripples or lotus leaf structures are likely to occur on the fabric after the horizontal opening operation, resulting in quality defects of the finished fabric. Summary of the invention

[0004] The object of the present invention is to provide a protective longitudinal width opening device to realize the protective longitudinal width opening operation of fabric and improve the quality of the finished fabric.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A protective longitudinal width opening device comprises a front roller group and a rear roller group, wherein the front roller group comprises an upper roller and a lower roller, wherein the upper roller and the lower roller clamp and convey the cloth, wherein the upper roller is connected with a reducer and a first servo motor, and the rear roller group comprises a first roller and a second roller, wherein the first roller and the second roller also clamp and convey the cloth, wherein the first roller is connected with a reducer and a second servo motor, and wherein the rotation speed of the first roller is greater than that of the upper roller.

[0007] Furthermore, the cloth is arranged in an S-shaped conveying structure at the rear roller group.

[0008] Furthermore, the cloth is arranged in an S-shaped conveying structure at the front roller group.

[0009] Furthermore, the reducer is a worm gear reducer structure.

[0010] Furthermore, a torque limiting mechanism is arranged at the outer end of the first roller shaft, and the torque limiting mechanism includes a front pressure plate and a rear pressure plate, the rear end of the front pressure plate is arranged with an umbrella gear structure, the front end of the rear pressure plate is arranged with an umbrella gear structure, a middle shaft is arranged at the center of the first roller shaft, the middle shaft is in a rotationally connected state with the first roller shaft, a spline section is provided at the outer end of the middle shaft, the rear pressure plate is connected to the middle shaft through the spline, a straight hole is provided at the center of the front pressure plate, the straight hole can accommodate the middle shaft, and the front pressure plate sleeve is placed on the middle shaft, and the rear end of the front pressure plate is fixedly connected to the first roller shaft.

[0011] Furthermore, a limit plate is arranged at the outer end of the rear pressure plate, and the limit plate is fixedly connected to the central axis. A plurality of limit rods are horizontally arranged in a circle of the limit plate, and a compression spring is arranged on the limit rod. The front end of the compression spring contacts the outer wall of the rear pressure plate.

[0012] Furthermore, the limiting rod is provided with a thread and is matched with a nut, and the rear end of the compression spring is in contact with the outer wall of the nut.

[0013] Furthermore, a one-way rotation limiting mechanism is arranged on the first roller shaft, and the one-way rotation limiting mechanism includes a ratchet and a pawl.

[0014] Furthermore, the one-way rotation limiting mechanism is a combination structure of two sets of staggered ratchets and pawls.

[0015] Compared with the existing technology, this solution has the following advantages:

[0016] The present invention is a protective longitudinal width-opening device, the core of which is to utilize the speed difference between the front roller group and the rear roller group, that is, the rear roller group at the rear end performs the cloth conveying operation at a speed slightly greater than the front roller group, and enables the cloth to be stretched, straightened and width-opened and shaped in the longitudinal direction, and can cooperate with the transverse width-opening equipment and oven, etc., to realize continuous and stable bidirectional width-opening operation;

[0017] This solution adopts a constant speed opening mode. The front roller group keeps the same speed as the fabric conveying speed, and the rear roller group appropriately increases the speed according to the requirements of the longitudinal opening to achieve stable tension between the two. Both the front roller group and the rear roller group adopt a servo motor and a worm gear reducer combination configuration, which has the characteristics of stable tension, simplicity and high efficiency.

[0018] In order to prevent the tension from being too large and causing excessive stretching of the fabric, a limited torque mechanism is arranged at the outer end of the first roller. The limited torque mechanism works based on the compression spring forcing the front pressure plate and the rear pressure plate to fit tightly. When the torque borne by the fabric is too large, slippage will occur between the front pressure plate and the rear pressure plate, thereby releasing the tension and ensuring the stretching quality of the fabric. At the same time, in order to prevent the fabric from stretching and rebounding when the front pressure plate and the rear pressure plate slip, a one-way rotation limiting mechanism is arranged on the first roller to ensure the self-locking and one-way rotation of the first roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment.

[0020] Figure 2 This is a schematic diagram of the side layout structure.

[0021] Figure 3 Schematic diagram of the structural decomposition of the torque limiting mechanism. DETAILED DESCRIPTION

[0022] refer to Figure 1 Figure 2 Figure 3 A protective longitudinal width opening device includes a front roller group 51 and a rear roller group 52. The front roller group 51 includes an upper roller 55 and a lower roller 56. The upper roller 55 and the lower roller 56 convey the cloth in an S-shaped rotating clamping state. The rear roller group 52 includes a first roller 54 and a second roller 55. The first roller 55 and the second roller 56 also convey the cloth in an S-shaped rotating clamping state. The cloth receives the cloth conveyed from the front end from the front roller group 51 and is output from the rear roller group 52. The cloth is conveyed in a horizontal tension state between the front roller group 51 and the rear roller group 52.

[0023] The upper roller 51 is connected to a reducer and a first servo motor 53, and the first roller 57 is connected to a reducer and a second servo motor 54. Under the action of the controller, the rotation speed of the first roller 57 is slightly greater than the rotation speed of the upper roller 53, so as to achieve the longitudinal stretching effect on the fabric between the two, and enable the fabric to achieve longitudinal stretching, straightening and width-opening shaping operations, and with the cooperation of equipment such as an oven, achieve continuous and stable longitudinal width-opening operations;

[0024] In order to achieve precise speed control, the reducer connected to the first servo motor 53 and the second servo motor 54 is a worm gear reducer structure, which has stable speed control and self-locking functions, and is particularly suitable for the tension opening operation of this solution.

[0025] In order to prevent excessive tension from causing excessive stretching of the fabric, and also to enable the equipment to adapt to various fabrics, a limited torque mechanism is arranged at the outer end of the first roller 57, and the limited torque mechanism includes a front pressure plate 61 and a rear pressure plate 62. The rear end of the front pressure plate 61 is arranged with a bevel gear structure, and the front end of the rear pressure plate 62 is arranged with a bevel gear structure. The front pressure plate 61 and the rear pressure plate 62 are arranged relative to each other, and the bevel gears of the two can mesh with each other to realize the transmission function. A central shaft 60 is arranged at the center of the first roller 57, and the outer end of the central shaft 60 is connected to the reducer and the second servo The motor 54 realizes its rotation transmission and speed control operations. The middle shaft 60 passes through the first roller shaft 57 and is in a rotational connection with the first roller shaft. A spline section 64 is provided on the outer side of the middle shaft 60. The rear pressure plate 62 is connected to the spline section 64 of the middle shaft 60 through a spline. Therefore, the rear pressure plate 62 can be displaced forward and backward within the stroke of the spline section 64, and the transmission function is implemented through the spline section 64. A straight hole is provided at the center of the front pressure plate 61. The straight hole can accommodate the middle shaft, and the front pressure plate 61 can be placed on the middle shaft 60. The rear end of the front pressure plate 61 is fixedly connected to the first roller shaft 57.

[0026] A limit plate 67 is arranged on the outer side of the rear pressure plate 62. The limit plate 67 is fixedly connected to the central axis 60, so it can rotate synchronously with the rear pressure plate 62. Four limit rods 66 are horizontally arranged in a circle of the limit plate 67. A compression spring 65 is arranged on the limit rod 66. The front end of the compression spring 65 contacts the outer wall of the rear pressure plate 62. The limit rod 66 is provided with a thread and is matched with a nut 67. The rear end of the compression spring 65 contacts the outer wall of the nut 67. Therefore, by rotating the nut 67, the pressure of the compression spring 65 on the rear pressure plate 62 can be adjusted, thereby controlling the bite force between the front pressure plate 61 and the rear pressure plate 62, which can play a role in torque limiting transmission, that is, the current pressure plate When the transmission torque between 61 and the rear pressure plate 62 is less than the bite force between the two, the second servo motor 54 drives the first roller 57 to operate normally through the middle shaft 60, the front pressure plate 61, and the rear pressure plate 62. When the first roller 57 is subjected to greater resistance to cloth stretching, the transmission torque between the front pressure plate 61 and the rear pressure plate 62 will be greater than the actual bite force between the two. Therefore, the front pressure plate 61 and the rear pressure plate 62 will slip at the bevel teeth, releasing the tension of the cloth conveying, thereby protecting the cloth and preventing it from being excessively stretched. By adjusting the nut 67 and then controlling the pressure of the compression spring 65, the limit tension and adjustment of different cloth can be achieved.

[0027] In order to prevent the first roller 57 from reversing when the bevel teeth of the front pressure plate 61 and the rear pressure plate 62 slip, a one-way rotation limiting mechanism is arranged on the first roller 57. The one-way rotation limiting mechanism includes a combination structure of a ratchet 68 and a pawl 69, wherein the arrangement direction of the pawl 69 is consistent with the normal rotation direction of the first roller 57. At the same time, in order to improve the reaction efficiency of the pawl 69 and reduce the influence between the tooth pitches, two sets of staggered ratchet and pawl combination structures are arranged.

[0028] In summary, the core of the protective longitudinal width-opening device of the present invention is to utilize the speed difference between the front roller group and the rear roller group, that is, the rear roller group at the rear end performs the cloth conveying operation at a speed slightly greater than that of the front roller group, and enables the cloth to be stretched, straightened and width-opened and shaped in the longitudinal direction, and can cooperate with the transverse width-opening equipment and oven, etc., to realize continuous and stable bidirectional width-opening operation;

[0029] This solution adopts a constant speed opening mode. The front roller group keeps the same speed as the fabric conveying speed, and the rear roller group appropriately increases the speed according to the requirements of the longitudinal opening to achieve stable tension between the two. Both the front roller group and the rear roller group adopt a servo motor and a worm gear reducer combination configuration, which has the characteristics of stable tension, simplicity and high efficiency.

[0030] In order to prevent the tension from being too large and causing excessive stretching of the fabric, a limited torque mechanism is arranged at the outer end of the first roller. The limited torque mechanism works based on the compression spring forcing the front pressure plate and the rear pressure plate to fit tightly. When the torque borne by the fabric is too large, slippage will occur between the front pressure plate and the rear pressure plate, thereby releasing the tension and ensuring the stretching quality of the fabric. At the same time, in order to prevent the fabric from stretching and rebounding when the front pressure plate and the rear pressure plate slip, a one-way rotation limiting mechanism is arranged on the first roller to ensure the self-locking and one-way rotation of the first roller.

Claims

1. A protective longitudinal opening device, characterized in that: It includes a front roller group and a rear roller group, the front roller group includes an upper roller and a lower roller, the upper roller and the lower roller clamp and convey the cloth, the upper roller is connected with a reducer and a first servo motor, the rear roller group includes a first roller and a second roller, the first roller and the second roller also clamp and convey the cloth, the first roller is connected with a reducer and a second servo motor, and the rotation speed of the first roller is greater than the rotation speed of the upper roller.

2. A protective longitudinal opening device according to claim 1, characterized in that: The cloth is arranged in an S-shaped conveying structure at the rear roller group.

3. A protective longitudinal opening device according to claim 2, characterized in that: The cloth is arranged in an S-shaped conveying structure at the front roller group.

4. A protective longitudinal opening device according to claim 1, characterized in that: The reducer is a worm gear reducer structure.

5. A protective longitudinal opening device according to claim 1, characterized in that: A limited torque mechanism is arranged at the outer end of the first roller shaft, and the limited torque mechanism includes a front pressure plate and a rear pressure plate, the rear end of the front pressure plate is arranged with an umbrella gear structure, the front end of the rear pressure plate is arranged with an umbrella gear structure, a middle shaft is arranged at the center of the first roller shaft, the middle shaft is in a rotational connection with the first roller shaft, a spline section is provided at the outer end of the middle shaft, the rear pressure plate is connected to the middle shaft through the spline, a straight hole is provided at the center of the front pressure plate, the straight hole can accommodate the middle shaft, and the front pressure plate sleeve is placed on the middle shaft, and the rear end of the front pressure plate is fixedly connected to the first roller shaft.

6. A protective longitudinal opening device according to claim 5, characterized in that: A limiting plate is arranged at the outer end of the rear pressure plate, and the limiting plate is fixedly connected to the central axis. A plurality of limiting rods are horizontally arranged in a circle of the limiting plate, and a compression spring is arranged on the limiting rod. The front end of the compression spring contacts the outer wall of the rear pressure plate.

7. A protective longitudinal opening device according to claim 6, characterized in that: The limiting rod is provided with a thread and matched with a nut, and the rear end of the compression spring contacts the outer wall of the nut.

8. A protective longitudinal opening device according to claim 1, characterized in that: A one-way rotation limiting mechanism is arranged on the first roller shaft, and the one-way rotation limiting mechanism includes a ratchet and a pawl.

9. A protective longitudinal opening device according to claim 8, characterized in that: The one-way rotation limiting mechanism is a combination structure of two sets of staggered ratchet wheels and pawls.

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