Weft skew adjustment mechanism and use method and weft straightening device using the same

Abstract

The present invention discloses a weft skew adjustment mechanism, a method of using the mechanism, and a weft straightening device employing the mechanism. The mechanism comprises: an upstream weft skew adjustment assembly, comprising at least one adjustment roller and a first drive structure for driving the at least one adjustment roller to swing; and a downstream weft skew adjustment assembly, disposed downstream of the upstream weft skew adjustment assembly and upstream of a fabric detection assembly of the weft straightening device. The downstream weft skew adjustment assembly comprises an independently operating roller and a second drive structure for driving the independently operating roller to swing. The present invention can improve the response speed of weft skew adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of printing and dyeing equipment, and in particular to a weft skew adjustment mechanism and a use method thereof, and a weft straightening device using the same. Background Art

[0002] During the weaving and finishing process, fabrics often produce weft skew, weft bend and flower shape deformation due to the influence of equipment precision errors, various mechanical movements and human operations, which affect subsequent processing and thus affect the quality of the finished fabric and reduce the use value of the textiles. Therefore, it is necessary to use a weft straightening machine to correct the weft skew, weft bend and flower shape deformation of the fabric.

[0003] The existing weft straightening machine includes several correction rollers, a fabric detection device for detecting fabric texture and pattern, and an electric controller. The correction rollers include a straight roller for correcting weft skew and a bending roller for correcting weft bend; the straight roller is installed in a weft skew frame, and the weft skew frame can be driven to rotate so that the straight roller and the fabric weft yarn are no longer parallel, thereby correcting the weft skew; the bending roller is a steel sleeve with a rubber roller surface that is looped on the bending roller core shaft. The steel sleeve can rotate around the bending roller core shaft, and the bending roller core shaft itself can also rotate. When the steel sleeve rotates, the weft bend is corrected; when the fabric is pressed against the straight roller or the arc-shaped rubber roller surface with a certain pressure, the relative running speed of the fabric warp yarn is changed, so that the corresponding part of the weft yarn bend is "advanced" or "lags", thereby restoring the vertical intersection of the weft yarn and the warp yarn in the full width, that is, the effect of correcting the weft by the correction roller is achieved.

[0004] Among them, for the straight roller structure for correcting weft skew, the weft straightening machine used in the through slot in the prior art realizes the correction of weft skew through multiple straight rollers at the same time. Generally, the adjustment stroke of the straight roller structure is also long, which can be as long as more than four meters. It is a system with a large delay and slow response. It is not conducive to real-time correction control, and cannot achieve high-precision weft straightening, and it is difficult to improve the product. Specifically, the fabric detection device used to detect the texture and shape of the fabric in the weft straightening device is located downstream of the straight roller structure for correcting weft skew (the downstream here corresponds to the running direction of the fabric). When the fabric detection device detects that the fabric has a weft skew problem, the straight roller structure can only adjust the fabric that is about to enter the straight roller structure during the adjustment process, and the fabric between the straight roller at the top of the straight roller structure and the fabric detection device can no longer be adjusted in time. In this way, it is difficult to avoid the situation where there are areas where the adjustment of the fabric fails, resulting in substandard product quality. Summary of the Invention

[0005] A first object of the present invention is to provide a weft skew adjustment mechanism to solve the technical problem of improving the response speed of weft skew adjustment.

[0006] A second object of the present invention is to provide a method for using a weft skew adjustment mechanism to solve the technical problem of improving the response speed of weft skew adjustment.

[0007] The third object of the present invention is to provide a weft straightening device to solve the technical problem of improving the response speed of weft skew adjustment.

[0008] The weft skew adjustment mechanism of the present invention is implemented as follows:

[0009] A weft skew adjustment mechanism, suitable for a weft straightening device, comprising:

[0010] a weft skew upstream adjustment assembly, comprising at least one adjustment roller and a first driving structure for driving the at least one adjustment roller to perform a swinging motion;

[0011] The weft skew downstream adjustment component is arranged downstream of the weft skew upstream adjustment component and upstream of the fabric detection component of the weft straightening device; the weft skew downstream adjustment component includes an independent operating roller and a second driving structure for driving the independent operating roller to perform a swinging motion.

[0012] In an optional embodiment of the present invention, the swing angle of the independently operating roller ranges from 3° to 30°.

[0013] In an optional embodiment of the present invention, the weft skew upstream adjustment component includes at least two adjustment rollers distributed in the longitudinal direction;

[0014] The swing angle of each adjustment roller ranges from 3° to 30°.

[0015] In an optional embodiment of the present invention, the weft skew downstream adjustment component further includes a guide structure provided on the bracket of the weft straightening device for guiding the swing trajectory of at least one axial end of the independently running roller.

[0016] In an optional embodiment of the present invention, rotating parts are respectively provided at both axial ends of the independently operating roller.

[0017] In an optional embodiment of the present invention, the second driving structure includes a moving block fixedly connected to the rotating member and a power assembly suitable for driving the moving block to be linearly connected.

[0018] In an optional embodiment of the present invention, the weft skew downstream adjustment component further includes a displacement sensor suitable for detecting the motion trajectory of the independently running roller.

[0019] The method for using the weft skew adjustment mechanism of the present invention is achieved as follows:

[0020] A method for using a weft skew adjustment mechanism, using the weft skew adjustment mechanism; comprising:

[0021] The independently operated roller and / or at least one adjusting roller perform oscillating motion to adjust the weft skew of the fabric.

[0022] In an optional embodiment of the present invention, when the deviation angle of the weft skew of the fabric is less than the maximum swing angle of the independent operating roller, the independent operating roller or at least one adjusting roller performs a swing motion to adjust the weft skew of the fabric;

[0023] When the deviation angle of the weft skew of the fabric is greater than the maximum swing angle of the independent operating roller, the weft skew of the fabric is adjusted by swinging the at least one adjustment roller and the independent operating roller simultaneously.

[0024] The weft straightening device of the present invention is achieved as follows:

[0025] A weft straightening device comprises the weft skew adjustment mechanism.

[0026] By adopting the above technical scheme, the present invention has the following beneficial effects: the weft skew adjustment mechanism and the use method of the present invention and the weft straightening device using the same, through the additional weft skew downstream adjustment component, the weft skew downstream adjustment component is arranged downstream of the weft skew upstream adjustment component and upstream of the fabric detection component of the weft straightening device; under such a structure, when the fabric has a weft skew deviation angle and needs to be adjusted, the independent running roller of the weft skew downstream adjustment component can be started in time to adjust the weft skew of the fabric; in this case, the weft skew of local areas and small segments is effectively corrected, and during correction, the response speed is fast, the speed regulation range is large, and the correction accuracy is high, which can well correct the local weft skew in a certain part of the textile and the full-width straight line, arc, hanging angle weft skew, etc. For the entire area or large segment weft skew, the downstream weft skew adjustment component can form effective cooperation with the upstream weft skew adjustment component. The downstream weft skew adjustment component can timely adjust the fabric between the uppermost adjustment roller in the upstream weft skew adjustment component and the fabric detection device, with extremely low delay, faster response time and better performance; thus avoiding the properties of the existing technology such as complex mechanical structure, long adjustment stroke, large delay system and slow response. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of the weft skew adjustment mechanism of the present invention applied to a weft straightening device from a first viewing angle;

[0028] Figure 2 This is a second perspective structural diagram of the fabric information collection mechanism and the weft skew adjustment mechanism of the present invention applied to a weft straightening device;

[0029] Figure 3 This is a schematic diagram of the weft skew adjustment mechanism of the fabric information collection mechanism of the present invention in a swinging motion state;

[0030] Figure 4 This is a partially enlarged schematic diagram of the weft skew adjustment mechanism of the fabric information collection mechanism of the present invention when performing a swinging motion;

[0031] Figure 5 It is a schematic diagram of the second driving structure of the weft skew adjustment mechanism of the fabric information collection mechanism of the present invention.

[0032] In the figure: adjustment roller 1, independent running roller 2, downstream waist groove 3, rotating part 4, bushing 5, bracket 6, screw 7, moving block 8, displacement sensor 9, fabric detection component 10, reduction motor 11, linear guide 12. DETAILED DESCRIPTION

[0033] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0034] Example 1:

[0035] See also Figures 1 to 5 As shown, this embodiment provides a weft skew adjustment mechanism suitable for a weft straightening device, including: a weft skew upstream adjustment component and a weft skew downstream adjustment component.

[0036] Specifically, the first is the weft upstream adjustment component, which includes at least two adjustment rollers 1 distributed longitudinally and a first drive structure for driving at least one adjustment roller 1 to perform synchronous swinging motion; it should be noted that the adjustment roller 1 and the first drive structure included in the weft upstream adjustment component here can optionally adopt the structure of any mature means in the prior art, such as the structure disclosed in the announcement number CN101818449B. This embodiment does not make specific limitations on this, so its specific structure is not repeated. The drawings of this embodiment only take the structure of two adjustment rollers 1 distributed longitudinally as an example. Of course, there can also be three, four, or more adjustment rollers 1 here, that is, a combination structure formed by multiple adjustment rollers 1. For multiple adjustment rollers 1, the arrangement method on the weft straightening device is a longitudinal distribution structure. In combination with the movement trajectory of the fabric on the weft straightening device, the "longitudinal" here refers to the movement direction of the fabric.

[0037] Compared with the weft straightening device in the prior art, the main improvement of this embodiment is that an independently operated weft skew downstream adjustment component is added to the weft straightening device, which is arranged downstream of the weft skew upstream adjustment component and upstream of the fabric detection component 10 of the weft straightening device. It should be noted here that the "upstream" and "downstream" defined in this embodiment correspond to the running direction of the fabric, that is, the one relatively close to the inlet end of the fabric is "upstream", and the one relatively close to the outlet end of the fabric is "downstream", that is to say, the weft skew downstream adjustment component added in this embodiment is closer to the fabric detection component 10. When the fabric detection component 10 determines that the fabric has weft skew, it can quickly respond and start adjusting the fabric.

[0038] As for the fabric detection component 10 in this embodiment, the fabric detection component 10 used in the weft straightening device in the prior art can also be used, and its specific structure and implementation principle are not absolutely limited in this embodiment.

[0039] Specifically, the downstream weft skew adjustment assembly employed in this embodiment includes an independently operating roller 2 and a second drive structure for driving the independently operating roller 2 into an oscillating motion. The specific shape and structure of the independently operating roller 2 and the adjustment roller 1 in the upstream weft skew adjustment assembly can be identical, thereby reducing equipment design, development, and processing costs. Of course, different roller structures can also be designed based on actual usage, and this embodiment is not an absolute limitation. Any roller capable of adjusting the fabric weft skew solely through oscillating motion meets the requirements of this embodiment.

[0040] It is also necessary to explain here the swinging motion of the independently operated roller 2 and the swinging motion of the adjustment roller 1 in the weft skew upstream adjustment assembly:

[0041] First, the direction of the swinging motion: The overall swinging motion direction of the two is the same. Combined with the movement trajectory of the fabric on the weft straightening device, the swinging motion direction here is perpendicular to the movement direction of the fabric. In other words, when adjusting the weft skew of the fabric, both the adjustment roller 1 and the independent running roller 2 adjust the weft skew by swinging in a direction perpendicular to the movement of the fabric.

[0042] The second is the angle of the swinging motion. The range of the swinging angle α of the independently running roller 2 is 3 to 30°. For the adjustment roller 1 of the upstream weft adjustment component, the range of the swinging angle of the adjustment roller 1 is 3 to 30°. When the upstream weft adjustment component includes multiple adjustment rollers 1, when adjusting the weft, the multiple adjustment rollers 1 can be swung at the same angle. At this time, only the same drive structure is needed to synchronously realize the swinging motion of the multiple adjustment rollers 1; of course, the multiple adjustment rollers 1 here can also perform different swinging angles. At this time, only one drive structure is needed for each different adjustment roller 1 to realize the swinging motion of the multiple adjustment rollers 1. This embodiment does not make an absolute limitation on the specific use of the above situation in the actual weft straightening device.

[0043] Each adjustment roller 1 has the same swing angle; and the swing angle of the adjustment roller 1 ranges from 3 to 30 degrees. Specifically, during the weft straightening process, the actual swing angles of the independent operating roller 2 and the adjustment roller 1 need to be determined based on the actual weft skew angle of the fabric. In other words, during actual operation, the swing angles of the independent operating roller 2 and the adjustment roller 1 must still be determined based on the weft skew angle of the fabric. In other words, during actual operation, the independent operating roller 2 and the adjustment roller 1 may have the same or different swing angles, and this is not an absolute limitation in this embodiment.

[0044] Regarding the form of oscillating motion, both the adjustment roller 1 and the independently operated roller 2 can oscillate at both axial ends, or at only one of the axial ends. Alternatively, one roller can oscillate at both axial ends, while the other roller can oscillate at only one axial end. Symmetry is not an absolute limitation in this embodiment.

[0045] Next, the swinging motion of the independently running roller 2 is described in detail. In order to limit the direction of the swinging motion of the independently running roller 2, the weft oblique downstream adjustment component of this embodiment also includes a guide structure provided on the bracket of the weft straightening device for guiding the swinging trajectory of at least one axial end of the independently running roller 2. That is, the guide structure can be provided at any axial end of the independently running roller 2. At this time, for the swinging motion of the independently running roller 2, the axial end provided with the guide structure forms the active end of the swinging motion of the independently running roller 2, while the other axial end without the guide structure forms the passive end of the swinging motion of the independently running roller 2. It is also possible to provide guide structures at both axial ends of the independently running roller 2. At this time, both axial ends of the independently running roller 2 form the active end of the swinging motion of the independently running roller 2. The above two structures both meet the use requirements of this embodiment, so this embodiment does not make absolute limitations.

[0046] It should also be noted that, to ensure that the swinging motion of the independently operating roller 2 does not affect its normal rotation, rotating members 4 are provided at each axial end of the independently operating roller 2 in this embodiment. This allows the independently operating roller 2 to simultaneously achieve normal rotation and swinging motion under the action of the rotating members 4. The rotating members 4 may be, for example, but not limited to, self-aligning bearings or spherical plain bearings. To this end, the independently operating roller 2 may be mated to the rotating members 4 via, for example, but not limited to, bushings 5.

[0047] Furthermore, for the guide structure in the above structure, in conjunction with the accompanying drawings, an example is given, in which the guide structure can be a linear guide rail 12 provided on the bracket, and the rotating member 4 on the independent running roller 2 is directly or indirectly connected to the linear guide rail 12. In this structure, when the linear guide rail 12 and the independent running roller 2 are respectively located on both sides of the side plate of the bracket 6 of the weft straightening device, a downstream waist-shaped groove 3 for the independent running roller 2 to pass through can be opened on the side plate of the bracket 6. In this structure, the second drive structure and the running range of the fabric can be separated by the side plate of the bracket 6. The accompanying drawings of this embodiment only use this structure as an example, but it is not an absolute limitation. Of course, here, the linear guide rail 12 and the independent running roller 2 can also be set on the same side of the side plate of the bracket 6. In this case, the downstream waist-shaped groove 3 is not required.

[0048] In addition, for the second driving structure, in order to realize the swinging motion of the independently running roller 2, the second driving structure includes a moving block 8 fixedly connected to the rotating member 4 and a power assembly suitable for driving the moving block 8 to perform linear motion, that is, the linear motion of the moving block 8 drives the rotating member 4 and the independently running roller 2 to perform swinging motion. The moving block 8 can be directly or indirectly connected to the linear guide 12, so that the linear guide 12 can realize the guiding effect on the motion trajectory of the moving block 8, improve the stability of the linear motion trajectory of the moving block 8, and not easily deviate. The power assembly here can be optionally adopted, for example, but not limited to, a linear push rod, a linear screw module or a pulley structure. This embodiment does not make an absolute limitation on this, that is, as long as the structure can realize the drive of the swinging motion of the independently running roller 2, it can be used in this embodiment.

[0049] The accompanying drawings of this embodiment only take the structure of the power component using a linear screw module as an example. The specific linear screw module includes, for example, but not limited to, a screw 7 and a nut used in conjunction with each other and a reduction motor 11 for driving the screw 7 to rotate. The reduction motor 11 here can be directly connected to the screw 7 to drive the screw 7 to rotate, and can also achieve the rotation of the screw 7 through a pulley structure. This embodiment does not make an absolute limitation on this. Here, the nut is connected to the moving block 8, so that when the screw 7 is running, the moving block 8 can move along the axial direction of the screw 7 with the nut to drive the independently running roller 2 to swing.

[0050] On the basis of the above structure, what needs to be explained about the weft downstream adjustment component is: taking an optional situation as an example with reference to the accompanying drawings, on the basis of the above structure, in order to accurately control the swinging motion trajectory of the independently running roller 2, the weft downstream adjustment component in this embodiment also includes a displacement sensor 9 suitable for detecting the motion trajectory of the independently running roller 2.

[0051] In summary, for the weft skew adjustment mechanism of this embodiment, the overall structure and operation of the downstream weft skew adjustment component are completely independent of the upstream weft skew adjustment component, and they do not interfere with each other. The two can operate independently to achieve weft skew adjustment for the fabric, or they can operate in conjunction to achieve weft skew adjustment for the fabric. The specific usage situation depends on the actual use requirements of the fabric, and this embodiment does not impose an absolute limitation on this.

[0052] Example 2:

[0053] Based on the weft skew adjustment mechanism of Example 1, this embodiment provides a method for using the weft skew adjustment mechanism, using the weft skew adjustment mechanism of Example 1;

[0054] Depending on the specific weft angle of the fabric, the weft adjustment mechanism can be used in the following three specific ways:

[0055] The first is to adjust the weft skew of the fabric by an independent roller 2 that performs an oscillating motion. The angular range of the weft skew adjustment that can be achieved is determined by the oscillating angle of the independent roller 2.

[0056] This case is particularly suitable for use when the deviation angle of the weft skew of the fabric is smaller than the maximum swing angle of the independently operating roller 2; specifically, this adjustment method is particularly suitable for effectively correcting the weft skew in local areas and small segments. During correction, it has the advantages of fast response speed, large speed regulation range, and high correction accuracy. It can well correct the local weft skew in a certain part of the textile as well as the full-width straight, arc-shaped, and hanging angle weft skew.

[0057] The second method is to adjust the weft of the fabric by swinging the at least one adjustment roller 1 included in the upstream weft adjustment component. The angular range of the weft adjustment that can be achieved at this time is determined by the swinging angle of the at least one adjustment roller 1 included in the upstream weft adjustment component. That is to say, when the upstream weft adjustment component includes N adjustment rollers 1, and the swinging angle of each adjustment roller 1 is set to a, the weft angle range that can be adjusted by the upstream weft adjustment component is a*N. In combination with a general weft straightening device, the upstream weft adjustment component used in the weft straightening device is mostly two or more adjustment rollers 1. Therefore, the adjustment range of the weft angle that can be achieved by the upstream weft adjustment component used in the overall weft straightening device can be greater than the adjustment range of the weft angle that can be achieved when the independently running roller 2 swings alone, that is, the range of the weft angle that can be adjusted is wider.

[0058] It should be noted that this method is also suitable for applications where the weft skew deviation angle of the fabric is small, particularly when the weft skew deviation angle of the fabric is smaller than the maximum swing angle of the independently operated roller 2. Although the response speed of the adjustment roller 1 is slower than that of the independently operated roller 2, the weft skew deviation angle in this case is small. Therefore, the upstream weft skew adjustment component alone can also achieve the purpose of fabric skew adjustment.

[0059] The third method is to adjust the weft skew of the fabric by simultaneously swinging an independently operated roller 2 in conjunction with at least one adjustment roller 1 included in the upstream weft skew adjustment assembly. The independently operated roller 2 of the downstream weft skew adjustment assembly promptly adjusts the fabric between the topmost adjustment roller in the upstream weft skew adjustment assembly and the fabric detection device. The angular range of weft skew adjustment achievable for the fabric in this area is determined by the swing angle of the independently operated roller 2. Simultaneously, the upstream weft skew adjustment assembly adjusts the fabric newly entering the downstream weft skew adjustment assembly. The angular range of weft skew adjustment achievable for the fabric in this area is determined by the number of adjustment rollers 1 and the swing angle of each adjustment roller 1. In other words, the angular range of weft skew adjustment achievable for the fabric in this area is a*N.

[0060] This is particularly suitable for applications where the weft skew deviation angle of the fabric is greater than the maximum oscillation angle of the independently operating roller 2. This makes it particularly suitable for adjusting the weft skew of an entire area or a large section. The downstream weft skew adjustment component effectively cooperates with the upstream weft skew adjustment component, resulting in extremely low latency, faster response time, and better performance. This completely avoids the complex mechanical structure, long adjustment stroke, large delay, and slow response characteristics of existing technologies.

[0061] Example 3:

[0062] Based on the weft skew adjustment mechanism of Example 1, this embodiment provides a weft straightening device, including: the weft skew adjustment mechanism of Example 1.

[0063] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0064] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0065] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0067] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0068] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A weft skew adjustment mechanism, suitable for a weft straightening device, characterized in that: include: a weft skew upstream adjustment assembly, comprising at least one adjustment roller and a first driving structure for driving the at least one adjustment roller to perform a swinging motion; a weft skew downstream adjustment assembly, disposed downstream of the weft skew upstream adjustment assembly and upstream of the fabric detection assembly of the weft straightening device; the weft skew downstream adjustment assembly comprises an independent operating roller and a second drive structure for driving the independent operating roller to perform a swinging motion; The swing angle of the independently operated roller is in the range of 3 to 30 degrees; The weft skew upstream adjustment component includes at least two adjustment rollers distributed in the longitudinal direction; The swing angle of each adjusting roller is in the range of 3 to 30 degrees; The weft skew downstream adjustment assembly further comprises a guide structure provided on the bracket of the weft straightening device for guiding the swing trajectory of at least one axial end of the independently operating roller; The two axial ends of the independently operating roller are respectively provided with rotating parts; The second driving structure includes a moving block fixedly connected to the rotating member and a power assembly suitable for driving the moving block to be linearly connected.

2. The weft skew adjustment mechanism according to claim 1, characterized in that: The weft skew downstream adjustment assembly further includes a displacement sensor adapted to detect the motion trajectory of the independently operating roller.

3. A method for using a weft skew adjustment mechanism, characterized in that: The weft skew adjustment mechanism according to any one of claims 1 or 2 is used; comprising: The independently operated roller and / or at least one adjusting roller perform oscillating motion to adjust the weft skew of the fabric.

4. The method for using the weft skew adjustment mechanism according to claim 3, wherein: When the deviation angle of the weft skew of the fabric is less than the maximum swing angle of the independent operating roller, the independent operating roller or at least one adjusting roller swings to adjust the weft skew of the fabric; When the deviation angle of the weft skew of the fabric is greater than the maximum swing angle of the independent operating roller, the weft skew of the fabric is adjusted by swinging the at least one adjustment roller and the independent operating roller simultaneously.

5. A weft straightening device, characterized in that: Adopt: the method for using the weft skew adjustment mechanism as described in claim 3 or 4.

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