Fabric corner falling correction device and weft straightener

Abstract

The utility model relates to the field of fabric correction, in particular to a fabric corner falling correction device and a weft straightener. The fabric corner falling correction device comprises a multi-section roller and at least one corner lifting assembly, the multi-section roller is used for supporting running fabric, the middle portion of the multi-section roller is a long roller face, the two ends of the multi-section roller are each provided with a plurality of short roller faces, and the short roller faces are arranged to be capable of passively and independently rotating; the corner lifting assembly is used for tightly pressing the side edge of the side where the corner of the fabric is located on the corresponding short roller face when the corner of the fabric is lost, and driving the corresponding side edge of the fabric to move at the linear speed different from the running speed of the fabric so as to correct the lost edge. The utility model can realize fabric corner loss correction and eliminate the defect of corner loss.

Description

Fabric corner correction device and weft straightening machine Technical Field

[0001] This utility model relates to the field of fabric correction, specifically to a fabric corner correction device and a weft straightening machine. Background Technology

[0002] As a key correcting device, the weft straightening machine is widely used in the textile production process. Existing weft straightening machines are mainly used to correct weft skew (overall tilting of the weft yarn) and weft bend (curved weft yarn) of the entire fabric or a large area. Its correction mechanism relies on uniform adjustment in the fabric width direction or symmetrical roller angle adjustment.

[0003] However, existing equipment struggles to effectively address the specific defect of corner slippage (manifested as a localized tilting or bending of the weft yarn in one or both edges of the fabric, mostly on one side, with a width typically ranging from 10 to 30 centimeters). Figure 12 shows a fabric image of a single-sided corner slippage, and Figure 13 is a magnified view of a portion of Figure 12. Its causes are complex (such as slight tilting of the guide roller, minor differences in roundness, and inconsistent tension on both sides of the fabric due to excessive fabric width), with an incidence rate of approximately 50%. For some fabrics, such as shoe materials, the incidence rate can exceed 80%, severely impacting output, quality, and production efficiency. Because corner slippage defects are localized (limited to edge areas) and asymmetrical (higher probability on one side), the overall correction mode of traditional weft straightening machines cannot precisely apply differentiated corrective forces to the edge areas.

[0004] Currently, the industry lacks solutions to the problem of fabric corner trimming, and the common approach is to cut off the defective portion to eliminate the defect. However, cutting off the corner not only exacerbates raw material waste but may also damage the functional layer structure of the fabric. Therefore, developing a device to correct fabric corner trimming has become a key technological requirement for improving textile production quality and reducing resource waste. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a fabric corner correction device that can correct fabric corners and eliminate corner defects.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a fabric corner correction device, comprising:

[0007] A multi-segment roller is used to support the running fabric. The middle part is a long roller surface, and the two ends are respectively provided with several short roller surfaces. The short roller surfaces are configured to be able to rotate passively and independently.

[0008] At least one corner-lifting component is used to press the side edge of the fabric where the corner is dropped onto the corresponding short roller surface when the fabric drops corner, and to drive the corresponding side edge of the fabric to move at a linear speed different from the running speed of the fabric to correct the corner drop.

[0009] Furthermore, to facilitate the movement of the corner lifting assembly along the fabric width, the fabric corner correction device also includes a corner lifting assembly width displacement mechanism connected to the corner lifting assembly, used to drive the corner lifting assembly to move along the fabric width.

[0010] Furthermore, to facilitate the clamping and disengaging of the lifting assembly from the fabric, the lifting assembly is configured to allow movement toward and away from the multi-segment rollers.

[0011] Further, a specific structure of a lifting corner assembly is provided, the lifting corner assembly comprising:

[0012] Lifting angle pressure roller;

[0013] An angle-lifting motor, connected to the angle-lifting pressure roller, is used to drive the angle-lifting pressure roller to rotate;

[0014] An angle-lifting movement drive unit, connected to the angle-lifting motor, is used to drive the angle-lifting motor and the angle-lifting pressure roller to move away from and towards the multi-segment roller.

[0015] Furthermore, to improve the correction effect, the fabric corner correction device also includes at least one cooperating component for pressing the starting position of the fabric corner onto the long roller surface or the corresponding short roller surface when the corner lifting component is working.

[0016] Furthermore, to facilitate the movement of the mating component along the fabric width, the fabric corner correction device also includes a mating component width displacement mechanism connected to the mating component, used to drive the mating component to move along the fabric width.

[0017] Further, a specific structure for a mating component is provided, the mating component comprising:

[0018] Rotatable mating pressure roller;

[0019] A movable drive component is connected to the mating pressure roller to drive the mating pressure roller to move toward and away from the multi-segment roller.

[0020] Furthermore, the mating assembly also includes a mating motor connected to the mating pressure roller for driving the mating pressure roller to rotate.

[0021] Furthermore, the long roller surface and all the short roller surfaces share a single mandrel, and the axial length of the short roller surface is 5mm-50mm.

[0022] Furthermore, the long roller surface is configured to rotate actively or passively.

[0023] This utility model also provides a fabric corner correction device, comprising:

[0024] A multi-segment roller for supporting a moving fabric has multiple short roller surfaces arranged sequentially along the axial direction, the short roller surfaces being configured to rotate passively and independently.

[0025] At least one lifting component is used to press the abnormal weft portion of the fabric against the corresponding short roller surface when the weft of the fabric is abnormal, and to move the abnormal weft portion of the fabric at a linear speed different from the running speed of the fabric to correct it.

[0026] This utility model also provides a weft straightening machine, including a fabric corner correction device.

[0027] After adopting the above technical solution, the ends of the multi-segment rollers have multiple short roller surfaces that can be passively and independently rotated. Therefore, when the fabric loses a corner, the side edge of the fabric on the side where the corner is located is moved by the corner lifting component. Thus, the corner part of the fabric has an independent running speed corresponding to each part of each short roller surface in the width direction. Therefore, by applying acceleration or deceleration to the side edge of the fabric on the side where the corner is located through the corner lifting component based on the corner loss situation, the corner loss of the fabric can be corrected, the local weft defect at the edge can be adjusted, thereby eliminating corner loss, improving fabric yield, and filling the technical gap of existing weft straightening equipment. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the structure of the first type of fabric corner correction device of this utility model (with fabric wrapping around it);

[0029] Figure 2 is an enlarged view of part A in Figure 1;

[0030] Figure 3 is the front view of Figure 1;

[0031] Figure 4 is a front view of the first type of fabric corner correction device of this utility model (without fabric wrapping);

[0032] Figure 5 is a schematic diagram of the structure of the multi-segment roller of the first type of fabric corner correction device of this utility model;

[0033] Figure 6 is a cross-sectional view of the multi-segment roller of the first type of fabric corner correction device of this utility model;

[0034] Figure 7 is a front view of the second type of fabric corner correction device of this utility model (without fabric wrapping);

[0035] Figure 8 is a structural schematic diagram of a multi-segment roller of the second type of fabric corner correction device of this utility model;

[0036] Figure 9 is a cross-sectional view of Figure 8;

[0037] Figure 10 is a schematic diagram of another multi-segment roller in the second type of fabric corner correction device of this utility model;

[0038] Figure 11 is a cross-sectional view of Figure 10;

[0039] Figure 12 is a schematic diagram of a fabric with a corner cut off on one side;

[0040] Figure 13 is a magnified view of a portion of Figure 12;

[0041] In the picture:

[0042] 1. Multi-segment roller; 11. Long roller surface; 12. Short roller surface; 13. Mandrel;

[0043] 2. Fabric;

[0044] 3. Angle lifting assembly; 31. Angle lifting pressure roller; 32. Angle lifting motor; 33. Angle lifting movement drive component;

[0045] 4. Radial displacement mechanism of the lifting angle assembly;

[0046] 5. Matching components; 51. Matching pressure rollers; 52. Matching motors; 53. Matching moving drive components;

[0047] 6. Matching component radial displacement mechanism;

[0048] 7. Rack;

[0049] 8. Guide rollers. Detailed Implementation

[0050] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0051] Example 1

[0052] As shown in Figures 1 to 6, a fabric corner correction device includes:

[0053] A multi-segment roller 1 is used to support the running fabric 2. The middle part is a long roller surface 11, and the two ends are respectively provided with a number of short roller surfaces 12. The short roller surfaces 12 are configured to be able to rotate passively and independently.

[0054] At least one corner-lifting component 3 is used to press the side edge of the fabric 2 where the corner is dropped onto the corresponding short roller surface 12 when the fabric 2 drops corner, and drive the corresponding side edge of the fabric 2 to move at a linear speed different from the running speed of the fabric 2 to correct the corner drop.

[0055] In this embodiment, considering that corner breakage of fabric 2 (corner breakage refers to the side edge of fabric 2, typically 10-30 cm wide, where the weft yarn is partially tilted or bent), mostly occurs on one side, only one corner lifting component 3 is needed. When corner breakage occurs, the corner lifting component 3 is moved to the side of fabric 2 where corner breakage occurs. Preferably, two corner lifting components 3 are provided, each corresponding to one side of fabric 2, so that even if corner breakage occurs on both sides of fabric 2, it can be handled.

[0056] It is important to note that the running speed of fabric 2 refers to the originally configured speed of fabric 2, or its normal conveying speed. Fabric 2 is supported by multi-segment roller 1, meaning that fabric 2 can have line contact with multi-segment roller 1, or it can have a certain wrap angle, preferably a certain wrap angle. During the operation of the corner lifting assembly 3, the linear speed at which the corner lifting assembly 3 presses against and moves fabric 2 depends on the corner drop condition of fabric 2. If the corner drop portion of fabric 2 tilts or bends from the starting position of the corner drop to the side where the corner drop is located towards the running direction of fabric 2, then the linear speed of the corner lifting assembly 3 is less than the running speed of fabric 2. If the corner drop portion of fabric 2 tilts or bends from the starting position of the corner drop to the side where the corner drop is located away from the running direction of fabric 2, then the linear speed of the corner lifting assembly 3 is greater than the running speed of fabric 2.

[0057] Specifically, the end of the multi-segment roller 1 has multiple short roller surfaces 11 that can be passively and independently rotated. Therefore, when the fabric 2 loses a corner, the side edge of the fabric 2 on the side where the corner is lost is moved by the corner lifting assembly 3. Thus, the corner part of the fabric 2 has an independent running speed corresponding to each part of each short roller surface 12 in the width direction. Then, by applying acceleration or deceleration to the side edge of the fabric 2 on the side where the corner is lost through the corner lifting assembly 3, the corner part of the fabric 2 can be corrected, the local weft defect at the edge can be adjusted, thereby eliminating the corner loss, improving the fabric yield, and filling the technical gap of existing weft straightening equipment.

[0058] In this embodiment, for ease of production and assembly, as shown in Figures 4, 5, and 6, the long roller surface 11 and all the short roller surfaces 12 can share a single mandrel 13. Generally, the axial length of the short roller surface 12 is 5mm-50mm, but it is not limited to this.

[0059] In this embodiment, the long roller surface 11 can be configured to rotate actively or passively. When the long roller surface 11 is configured to rotate actively, it can be fixedly mounted on the mandrel 13, and each short roller surface 12 is rotated and mounted on the mandrel 13 via a bearing. When the long roller surface 11 is configured to rotate passively, both the long roller surface 11 and each short roller surface 12 are rotatably mounted on the mandrel 13 via a bearing.

[0060] In this embodiment, both the long roller surface 11 and the short roller surface 12 can be rubber-coated roller surfaces, which can provide friction to the fabric 2.

[0061] In this embodiment, preferably, the corner lifting assembly 3 is configured to allow movement toward and away from the multi-segment roller 1. Thus, when no corner is falling off the fabric 2, the corner lifting assembly 3 moves away from the multi-segment roller 1 to a position detached from the fabric 2; when a corner is falling off the fabric 2, the corner lifting assembly 3 moves toward the multi-segment roller 1 to press the fabric 2.

[0062] As shown in Figures 1, 2, 3, and 4, the structure of the lifting corner component 3 may include, but is not limited to:

[0063] 31 lifting angle pressure roller;

[0064] Angle-lifting motor 32 is connected to the angle-lifting pressure roller 31 and is used to drive the angle-lifting pressure roller 31 to rotate;

[0065] The lifting angle movement drive 33 is connected to the lifting angle motor 32 and is used to drive the lifting angle motor 32 and the lifting angle pressure roller 31 to move away from and towards the multi-segment roller 1. The lifting angle movement drive 33 can be a cylinder, hydraulic cylinder, linear module, etc.

[0066] Of course, the lifting roller 31 and lifting motor 32 of the lifting component 3 can also be replaced with a pressure block and a linear displacement component. The linear displacement component is connected to the pressure block and drives the pressure block to move linearly.

[0067] In this embodiment, as shown in Figures 1, 2, 3 and 4, the entire fabric corner correction device is integrated on a frame 7, and at least one guide roller 8 for guiding the fabric 2 is rotatably mounted on the frame 7.

[0068] Example 2

[0069] Based on Embodiment 1, as shown in Figures 1, 2, 3, and 4, the fabric corner correction device further includes a corner-lifting component lateral displacement mechanism 4, which is connected to the corner-lifting component 3 and is used to drive the corner-lifting component 3 to move along the width of the fabric 2. The corner-lifting component lateral displacement mechanism 4 can be a cylinder, a linear module, or a synchronous belt drive, etc.

[0070] It should be noted that the lateral displacement mechanism 4 of the corner-lifting assembly corresponds to the corner-lifting assembly 3. Thus, when only one corner-lifting assembly 3 is provided, the lateral displacement mechanism 4 facilitates the movement of the corner-lifting assembly 3 to the corner side of the fabric 2, making the entire device easily adaptable to fabrics 2 of different widths. When two corner-lifting assemblies 3 are configured, the lateral displacement mechanism 4 further facilitates the application of the entire device to fabrics 2 of different widths.

[0071] Example 3

[0072] Based on Embodiment 1 or Embodiment 2, as shown in Figures 1, 2, 3 and 4, the fabric corner correction device further includes at least one cooperating component 5, which is used to press the starting position of the corner of the fabric 2 onto the long roller surface 11 or the corresponding short roller surface 12 when the corner lifting component 3 is working.

[0073] In this embodiment, as shown in Figures 1, 2, 3, and 4, the mating component 5 corresponds to the lifting component 3. Its structure may include, but is not limited to, a rotatable mating pressure roller 51 and a mating moving drive component 53. The mating moving drive component 53 is connected to the mating pressure roller 51 and is used to drive the mating pressure roller 51 to move towards and away from the multi-segment roller 1. The mating moving drive component 53 can be a cylinder, a hydraulic cylinder, a linear module, etc.

[0074] Specifically, by using the component 5 to press the starting position of the corner drop of the fabric 2 onto the long roller surface 11 or the corresponding short roller surface 12, it can play a blocking role and prevent the corner lifting component 3 from affecting the normal part of the fabric 2 during the process of correcting the corner drop of the fabric 2.

[0075] In this embodiment, the mating component 5 may further include a mating motor 52 connected to the mating pressure roller 51 for driving the mating pressure roller 51 to rotate. Generally, the mating motor 52 drives the mating pressure roller 51 to rotate at the same linear speed as the running speed of the fabric 2.

[0076] Example 4

[0077] Based on Embodiment 3, as shown in Figures 1, 2, 3, and 4, the fabric corner correction device further includes a lateral displacement mechanism 6 for the mating component, which is connected to the mating component 5 and is used to drive the mating component 5 to move along the lateral direction of the fabric. The lateral displacement mechanism 6 for the mating component can be a cylinder, a linear module, or a synchronous belt drive, etc.

[0078] In this way, the mating component 5 can be easily driven to move, so that the entire mating component 5 can be used for different corner starting positions.

[0079] Example 5

[0080] As shown in Figures 7, 8, 9, and 10, a fabric corner correction device includes:

[0081] The multi-segment roller 1, used to support the running fabric 2, has a plurality of short roller surfaces 12 arranged sequentially along the axial direction, and the short roller surfaces 12 are configured to be able to rotate passively and independently.

[0082] At least one lifting component 3 is used to press the abnormal weft part of the fabric 2 onto the corresponding short roller surface 12 when the weft of the fabric 2 is abnormal, and to drive the abnormal weft part of the fabric 2 to move at a linear speed different from the running speed of the fabric 2 to correct it.

[0083] The main difference between this embodiment and Embodiment 1 is that there are only short roller surfaces 12, and the axial length of each short roller surface 12 is preferably 5mm-50mm. This fabric corner correction device can not only correct corners of fabric 2, but also correct local weft abnormalities such as local weft bends, local weft skews, and wavy bends in the middle area of ​​fabric 2. It can also achieve full-width weft skew and full-width weft bend correction of fabric 2 (i.e., replace the existing weft straightening device), which is more flexible.

[0084] In this embodiment, as shown in FIG7, the fabric corner correction device may further include a corner lifting component lateral displacement mechanism 4, a mating component 5, and a mating component lateral displacement mechanism 6.

[0085] In this embodiment, one corner lifting component 3 can be provided, or two, three, etc., depending on the specific situation.

[0086] Example 6

[0087] A weft straightening machine includes the fabric corner correction device in any one of the embodiments 1 to 5.

[0088] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fabric corner correction device, characterized in that, include: A multi-segment roller (1) is used to support the running fabric (2). The middle part is a long roller surface (11), and the two ends are respectively provided with a number of short roller surfaces (12). The short roller surfaces (12) are configured to be able to rotate passively and independently. At least one corner lifting component (3) is used to press the side of the fabric (2) where the corner is dropped onto the corresponding short roller surface (12) when the fabric (2) drops corners, and drive the corresponding side of the fabric (2) to move at a linear speed different from the running speed of the fabric (2) to correct the corner drop.

2. The fabric corner correction device according to claim 1, characterized in that, It also includes a lifting component lateral displacement mechanism (4), which is connected to the lifting component (3) and is used to drive the lifting component (3) to move laterally along the fabric (2).

3. The fabric corner correction device according to claim 1, characterized in that, The lifting assembly (3) is configured to allow movement toward and away from the multi-segment roller (1).

4. The fabric corner correction device according to claim 3, characterized in that, The lifting assembly (3) includes: a lifting pressure roller (31); a lifting motor (32) connected to the lifting pressure roller (31) for driving the lifting pressure roller (31) to rotate; and a lifting movement drive (33) connected to the lifting motor (32) for driving the lifting motor (32) and the lifting pressure roller (31) to move away from and towards the multi-segment roller (1).

5. The fabric corner correction device according to claim 1, characterized in that, It also includes at least one cooperating component (5) for pressing the starting position of the corner drop of the fabric (2) onto the long roller surface (11) or the corresponding short roller surface (12) when the corner lifting component (3) is working.

6. The fabric corner correction device according to claim 5, characterized in that, It also includes a lateral displacement mechanism (6) for the mating component, which is connected to the mating component (5) and is used to drive the mating component (5) to move laterally along the fabric (2).

7. The fabric corner correction device according to claim 5, characterized in that, The mating assembly (5) includes: a rotatable mating pressure roller (51); and a mating movement drive (53) connected to the mating pressure roller (51) for driving the mating pressure roller (51) to move toward and away from the multi-segment roller (1).

8. The fabric corner correction device according to claim 7, characterized in that, The mating assembly (5) also includes a mating motor (52), which is connected to the mating pressure roller (51) and is used to drive the mating pressure roller (51) to rotate.

9. The fabric corner correction device according to claim 1, characterized in that, The long roller surface (11) and all the short roller surfaces (12) share a mandrel (13), and the axial length of the short roller surface (12) is 5mm-50mm.

10. The fabric corner correction device according to claim 1, characterized in that, The long roller surface (11) is configured to rotate actively or passively.

11. A fabric corner correction device, characterized in that, include: A multi-segment roller (1) is used to support the running fabric (2) and has a plurality of short roller surfaces (12) arranged sequentially along the axial direction. The short roller surfaces (12) are configured to be able to rotate passively and independently. At least one lifting corner assembly (3) is used to press the abnormal weft part of the fabric (2) onto the corresponding short roller surface (12) when the weft of the fabric (2) is abnormal, and to drive the abnormal weft part of the fabric (2) to move at a linear speed different from the running speed of the fabric (2) to correct it.

12. A weft straightening machine, characterized in that, Includes the fabric corner correction device according to any one of claims 1-11.

Images