A device that can be used for fabric deviation correction and spreading during fabric feeding and discharging

Abstract

The present invention relates to the rectification and spreading of fabric feeding and discharging in the textile and related industries, and particularly refers to a device that can be used for rectifying and spreading the incoming and outgoing fabric. It includes a left fixed cam, a left rotating clamping leg, a left swing clamping leg, a right fixed cam, a right rotating clamping leg, and a right swing clamping leg. The left fixed cam, the left rotating clamping leg, and the left swing clamping leg form the left half of the device, and the right fixed cam, the right rotating clamping leg, and the right swing clamping leg form the right half of the device. The present invention can achieve the functions of spreading and rectifying during the fabric conveying process under the drive of an external power source.

Description

Technical Field

[0001] The present invention relates to the deviation correction and spreading of fabric feeding and discharging in the textile and related industries, and particularly refers to a device that can be used for deviation correction and spreading of fabric during feeding and discharging. Background Art

[0002] In the textile industry and related industries, when feeding fabric onto the inner reel of a device or discharging fabric onto the reel on an external support, it is usually required that the axial deviation of the fabric wound onto the reel is within a relatively small deviation range. However, due to reasons such as fabric tension, the fabric will shift to one side when being wound onto the reel during feeding or discharging, exceeding the allowable deviation range. Therefore, it is necessary to correct the deviation of the fabric during the feeding and discharging processes of the fabric. Currently, there are already some devices for correcting the deviation of fabric during feeding and discharging, but they need to bypass multiple rollers, with a complex structure and high cost. In addition, when feeding fabric into some textile machines, it is sometimes necessary to laterally spread the fabric to reduce fabric wrinkles. Usually, curved rollers and double - helix rollers are used for spreading, but these spreading methods often do not have good effects, and the fabric also needs to bypass multiple rollers, making it inconvenient to load the fabric. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the present invention proposes a device that can be used for deviation correction and spreading of fabric during feeding and discharging.

[0004] The present invention achieves the above - mentioned technical purpose through the following technical means.

[0005] A device that can be used for deviation correction and spreading of fabric during feeding and discharging, characterized in that the device includes a left fixed cam, a left rotating leg, a left swinging leg, a right fixed cam, a right rotating leg, and a right swinging leg. The left fixed cam, the left rotating leg, and the left swinging leg form the left half of the device, and the right fixed cam, the right rotating leg, and the right swinging leg form the right half of the device.

[0006] When the left half and the right half of the device are working, they are located on both sides of the conveyed fabric. The left fixed cam and the right fixed cam have no rotational freedom. The left rotating leg and the left swinging leg are connected by a rotating pair. One end of the left rotating leg can rotate around a fixed axis, and the other end and one end of the left swinging leg form a left clamping mouth that can be opened and closed. The left swinging leg rotates in the same direction as the left rotating leg, and the other end of the left swinging leg is always in contact with the contour curve of the left fixed cam. The right rotating leg and the right swinging leg are connected by a rotating pair. One end of the right rotating leg can rotate around a fixed axis, and the other end and one end of the right swinging leg form a right clamping mouth that can be opened and closed. The right swinging leg rotates in the same direction as the right rotating leg, and the other end of the right swinging leg is always in contact with the contour curve of the right fixed cam.

[0007] The left rotating clamping leg drives the left rotating clamping leg to rotate together, so that the left clamping opening forks into or out of the cloth. One end of the left swing clamping leg contacts different positions of the contour curve of the left fixed cam, so that the left clamping opening opens and closes to clamp or release the cloth. Similarly, the right rotating clamping leg drives the right rotating clamping leg to rotate together, so that the right clamping opening forks into or out of the cloth. One end of the right swing clamping leg contacts different positions of the contour curve of the right fixed cam, so that the right clamping opening opens and closes to clamp and release the cloth.

[0008] When the cloth spreading work of the present invention is carried out, the left rotating clamping leg and the right rotating clamping leg rotate around the corresponding axes under the drive of external power, thereby driving the left clamping opening and the right clamping opening to rotate. When both sides of the cloth are respectively inserted into the left clamping opening and the right clamping opening, the left clamping opening and the right clamping opening are in an open state, and will not generate a lateral thrust on the cloth, nor will the cloth be wrinkled. When the left clamping opening and the right clamping opening further rotate away from the cloth, the left clamping opening and the right clamping opening are in a clamped state, and will clamp the cloth, applying a lateral pulling force away from the cloth to the cloth, so as to realize the lateral outward spreading of the cloth.

[0009] When the external deviation correction sensor detects that the cloth axially deviates to a certain extent during the conveying process, it is necessary to correct the deviation of the cloth. For example, if the cloth deflects to the left, the right rotating clamping leg rotates around the corresponding axis under the drive of external power, driving the right clamping opening to rotate. When the cloth is inserted into the right clamping opening, the right clamping opening is in an open state, and when the right clamping opening further rotates away from the cloth, it will be in a clamped state to clamp the cloth area, applying a lateral rightward pulling force to the right side of the cloth, while the external power drive that provides the rotation power to the left rotating clamping leg will not provide output power to the left rotating clamping leg, and the left clamping opening will not rotate, so that no leftward pulling force will be generated on the left side of the cloth. Under the action of the rightward pulling force, the cloth is driven to deflect to the right, realizing the deviation correction of the conveyed cloth. On the contrary, if the cloth deflects to the right, the left rotating clamping leg rotates around the corresponding axis under the drive of external power, driving the left clamping opening to rotate. When the cloth is inserted into the left clamping opening, the left clamping opening is in an open state, and when the left clamping opening further rotates away from the cloth, it will be in a clamped state to clamp the cloth area, applying a lateral leftward pulling force to the left side of the cloth, while the external power drive that provides the rotation power to the right rotating clamping leg will not provide output power to the right rotating clamping leg, and the right clamping opening will not rotate, so that no rightward pulling force will be generated on the right side of the cloth. Under the action of the leftward pulling force, the cloth is driven to deflect to the left, and the deviation correction of the conveyed cloth is also realized.

[0010] The present invention discloses a device for cloth feeding and discharging deviation correction and cloth spreading, which can realize the functions of cloth spreading and deviation correction during the cloth conveying process under the drive of external power. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the principle of a device for cloth feeding and discharging deviation correction and cloth spreading according to the present invention;

[0012] Figure 2Schematic diagram of the structure of a device for fabric deviation correction and spreading in Embodiment 1 of the present invention;

[0013] Figure 3 Schematic diagram of the first cam contour curve of a device for fabric deviation correction and spreading in Embodiment 1 of the present invention;

[0014] Figure 4 Schematic diagram of the second cam contour curve of a device for fabric deviation correction and spreading in Embodiment 1 of the present invention.

[0015] Figure 1 The reference numerals in [figure] represent: 1 - left fixed cam, 2 - left rotating leg, 3 - left swinging leg, 4 - right fixed cam, 5 - right rotating leg, 6 - right swinging leg.

[0016] Figure 2 The reference numerals in [figure] represent: 7 - first cam, 8 - first bearing upper cover, 9 - first rolling bearing, 10 - first flat key, 11 - first nut, 12 - first rotating shaft, 13 - first rotating leg, 14 - first swinging leg, 15 - first circlip, 16 - second circlip, 17 - second swinging leg, 18 - second cam, 19 - second rotating leg, 20 - second rolling bearing, 21 - second bearing upper cover, 22 - second rotating shaft, 23 - fourth nut, 24 - second flat key, 25 - second retaining ring, 26 - fifth nut, 27 - second bearing lower cover, 28 - second spring, 29 - sixth nut, 30 - second pin shaft, 31 - third sleeve, 32 - fourth sleeve, 33 - third circlip, 34 - fourth circlip, 35 - first sleeve, 36 - second sleeve, 37 - first pin shaft, 38 - third nut, 39 - first spring, 40 - second nut, 41 - first retaining ring, 42 - first bearing lower cover. Detailed implementation manners

[0017] The embodiments of the present invention will be described in detail below. The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth", "fifth", "sixth" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0019] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The structure of Embodiment 1 of the present invention is as Figure 2 shown, and mainly includes: a first cam 7, a first bearing upper cover 8, a first rolling bearing 9, a first flat key 10, a first nut 11, a first rotating shaft 12, a first rotating leg 13, a first swinging leg 14, a first snap ring 15, a second snap ring 16, a second swinging leg 17, a second cam 18, a second rotating leg 19, a second rolling bearing 20, a second bearing upper cover 21, a second rotating shaft 22, a fourth nut 23, a second flat key 24, a second retaining ring 25, a fifth nut 26, a second bearing lower cover 27, a second spring 28, a sixth nut 29, a second pin shaft 30, a third sleeve 31, a fourth sleeve 32, a third snap ring 33, a fourth snap ring 34, a first sleeve 35, a second sleeve 36, a first pin shaft 37, a third nut 38, a first spring 39, a second nut 40, a first retaining ring 41, and a first bearing lower cover 42.

[0021] The first cam 7, the first bearing upper cover 8, the first rolling bearing 9, the first flat key 10, the first nut 11, the first rotating shaft 12, the first rotating clamping leg 19, the first swinging clamping leg 14, the first circlip 15, the second circlip 16, the first sleeve 35, the second sleeve 36, the first pin shaft 37, the third nut 38, the first spring 39, the second nut 40, the first retaining ring 41 and the first bearing lower cover 42 form the left half of the device. One end of the first rotating clamping leg 13, one end of the first swinging clamping leg 14, the first circlip 15, the second circlip 16, the first sleeve 35 and the second sleeve 36 construct the left clamping opening.

[0022] The second swinging clamping leg 17, the second cam 18, the second rotating clamping leg 19, the second rolling bearing 20, the second bearing upper cover 21, the second rotating shaft 22, the fourth nut 23, the second flat key 24, the second retaining ring 25, the fifth nut 26, the second bearing lower cover 27, the second spring 28, the sixth nut 29, the second pin shaft 30, the third sleeve 31, the fourth sleeve 32, the third circlip 33 and the fourth circlip 34 form the right half of the device. One end of the second swinging clamping leg 17, one end of the second rotating clamping leg 19, the third sleeve 31, the fourth sleeve 32, the third circlip 33 and the fourth circlip 34 construct the right clamping opening.

[0023] The first cam 7 is a disc-shaped cam, and the cam contour curve is as Figure 3As shown, between the phase angles of 10° and 90°, it is an arc with the smallest radius vector; between the phase angles of 180° and 340°, it is an arc with the largest radius vector. From the phase angle of 340° to 360° and from 0° to 10°, the radius vector gradually decreases according to the law of uniform motion; from the phase angle of 90° to 180°, the radius vector gradually increases according to the law of uniform motion. The upper cover 8 of the first bearing is connected to the upper end of the first cam 7, and the lower cover 42 of the first bearing is connected to the lower end of the first cam 7. The upper cover 8 of the first bearing and the lower cover 42 of the first bearing fix the first rolling bearing 9 inside the inner cavity of the first cam 7. The first rolling bearing 9 is installed on the first rotating shaft 12, and the second nut 40 axially fixes the first rolling bearing 9 on the first rotating shaft 12 through the first retaining ring 41. One end of the first rotating shaft 12 is connected to external power, and the other end forms a shaft-hub connection with the first rotating clamping leg 13 through the first flat key 10. There is a threaded connection between the first nut 11 and the first rotating shaft 12 to axially fix the first rotating clamping leg 13 on the first rotating shaft 12. The first rotating clamping leg 13 and the first swinging clamping leg 14 are installed on the first pin shaft 37 and are axially fixed on the first pin shaft 37 through the third nut 38. Both the first rotating clamping leg 13 and the first swinging clamping leg 14 can rotate around the first pin shaft 37, forming a rotating pair through the first pin shaft 37. The outer side of the cylinder body of the second sleeve 36 is wrapped with soft rubber and is installed on the first swinging clamping leg 14. The second sleeve 36 can rotate on the first swinging clamping leg 14 and is axially fixed on the first swinging clamping leg 14 through the first elastic retaining ring 15. The outer side of the cylinder body of the first sleeve 35 is wrapped with soft rubber and is installed on the first rotating clamping leg 13. The first sleeve 35 can rotate on the first rotating clamping leg 13 and is axially fixed on the first rotating clamping leg 13 through the second elastic retaining ring 16. The first spring 39 is a tension spring and is connected between the first rotating clamping leg 13 and the first swinging clamping leg 14.

[0024] The second cam 18 is also a disc-shaped cam, and the cam contour curve is as Figure 4As shown, between the phase of 90° and 170° is a section of arc with the minimum radius vector, and between the phase of 200° and 360° is a section of arc with the maximum radius vector. From the phase of 0° to 90°, the radius vector decreases gradually according to the uniform motion law, and from the phase of 170° to 200°, the radius vector increases gradually according to the uniform motion law. The upper cover 21 of the second bearing is connected to the upper end of the second cam 18, and the lower cover 27 of the second bearing is connected to the lower end of the second cam 18. The upper cover 21 of the second bearing and the lower cover 27 of the second bearing fix the second rolling bearing 20 inside the inner cavity of the second cam 18. The second rolling bearing 20 is installed on the second rotating shaft 22, and the fifth nut 26 axially fixes the second rolling bearing 20 on the second rotating shaft 22 through the second retaining ring 25. One end of the second rotating shaft 22 is connected to external power, and the other end forms a shaft-hub connection with the second rotating leg 19 through the fourth nut 24. The fourth nut 23 is in threaded connection with the second rotating shaft 22 to axially fix the second rotating leg 19 on the second rotating shaft 22. The second rotating leg 19 and the second swinging leg 17 are installed on the second pin shaft 30 and are axially fixed on the second pin shaft 30 through the sixth nut 29. Both the second rotating leg 19 and the second swinging leg 17 can rotate around the second pin shaft 30 and form a rotating pair through the second pin shaft 30. The outer side of the barrel of the fourth sleeve 32 is wrapped with soft rubber and is installed on the second swinging leg 17. The fourth sleeve 32 can rotate on the second swinging leg 17 and is axially fixed on the second swinging leg 17 through the fourth elastic retaining ring 34. The outer side of the barrel of the third sleeve 31 is wrapped with soft rubber and is installed on the second rotating leg 19. The third sleeve 31 can rotate on the second rotating leg 19 and is axially fixed on the second rotating leg 19 through the third elastic retaining ring 33. The second spring 28 is a tension spring and is connected between the second rotating leg 19 and the second swinging leg 17.

[0025] In the left half and the right half of the device according to Embodiment 1 of the present invention, they are respectively placed on both sides of the conveyed cloth, and the first cam 7 and the second cam 18 are fixed. The external power drives the first rotating shaft 12 to rotate counterclockwise, driving the first rotating clamping leg 13 to rotate counterclockwise, thereby driving the left clamping opening to rotate around the axis of the first rotating shaft 12. In this way, the left clamping opening can fork into or out of the cloth. Under the action of the first spring 39, one end of the first swinging clamping leg 14 is always in contact with the contour curve of the first cam 7. When the first swinging clamping leg 14 rotates around the first cam 7, it will perform a cyclic action of "swinging - stopping - swinging back - stopping". The left clamping opening opens to enter the cloth, and when leaving the cloth, it clamps the cloth, providing a leftward pulling force to the cloth. The external power drives the second rotating shaft 22 to rotate clockwise, driving the second rotating clamping leg 19 to rotate clockwise, thereby driving the right clamping opening to rotate around the axis of the second rotating shaft 22. In this way, the right clamping opening can fork into or out of the cloth. Under the action of the second spring 28, one end of the second swinging clamping leg 17 is always in contact with the contour curve of the second cam 18. When the second swinging clamping leg 17 rotates around the second cam 18, it will perform a cyclic action of "swinging - stopping - swinging back - stopping". The right clamping opening opens to enter the cloth, and when leaving the cloth, it clamps the cloth, providing a rightward pulling force to the cloth. The first sleeve 35, the second sleeve 36 at the left clamping opening and the third sleeve 31, the fourth sleeve 32 at the right clamping opening can rotate, and the outer side of the cylinder body is wrapped with soft rubber, which can realize the clamping of cloths with different thicknesses and prevent the cloth from being stuck.

[0026] During the cloth spreading operation in Embodiment 1 of the present invention, the external power drives the first rotating shaft 12 to rotate counterclockwise. When the left clamping opening leaves the cloth, it generates a leftward pulling force on the cloth. The external power drives the second rotating shaft 22 to rotate clockwise. When the right clamping opening leaves the cloth, it generates a rightward pulling force on the cloth, thereby achieving the effect of stretching the cloth to both sides.

[0027] When performing the deviation correction work on the cloth conveying, if the cloth is biased to the left, the external control unit receives the signal that the left clamping opening has left the cloth. The external control unit will control the external power to stop supplying the conveying power to the first rotating shaft 12. The second rotating shaft 22 rotates clockwise under the drive of the external power. When the right clamping opening leaves the cloth, it generates a rightward pulling force on the cloth, pulling the cloth to the right, and realizing the deviation correction of the cloth to the right. If the cloth is biased to the right, the external control unit receives the signal that the right clamping opening has left the cloth. The external control unit will control the external power to stop supplying the conveying power to the second rotating shaft 22. The first rotating shaft 12 rotates counterclockwise under the drive of the external power. When the left clamping opening leaves the cloth, it generates a leftward pulling force on the cloth, pulling the cloth to the left, and realizing the deviation correction of the cloth to the left.

[0028] Embodiment 2: On the basis of Embodiment 1 of the present invention, the first cam 7 and the second cam 18 are spatial cylindrical cams with grooves, and the device does not include the first spring 39 and the second spring 28.

[0029] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without creative efforts, various changes made by those skilled in the art starting from the above conceptions fall within the protection scope of the present invention.

[0030] Note: Inserting means opening the jaws of the finger clip to allow the cloth to enter the jaws; clamping means closing the jaws of the finger clip to clamp the cloth.

Claims

1. A device that can be used for fabric deviation correction and spreading during fabric entry and exit, characterized in that, The device comprises a left fixed cam, a left rotating clamping leg, a left rotating swing clamping leg, a right fixed cam, a right rotating clamping leg and a right rotating swing clamping leg; the left fixed cam, the left rotating clamping leg and the left rotating swing clamping leg constitute the left half of the device, and the right fixed cam, the right rotating clamping leg and the right rotating swing clamping leg constitute the right half of the device; when the left half and the right half of the device are working, they are located on both sides of the conveyed cloth, the left fixed cam and the right fixed cam have no rotational freedom, and the left rotating clamping leg is connected to the left rotating swing clamping leg by a rotating pair; one end of the left rotating clamping leg can rotate around a fixed axis, and the other end forms an openable and closable left clamping opening with one end of the left rotating swing clamping leg, the left rotating swing clamping leg rotates in the same direction as the left rotating clamping leg, and the other end of the left rotating swing clamping leg is always in contact with the contour curve of the left fixed cam; the right rotating clamping leg and the right rotating swing clamping leg are connected by a rotating pair; the right rotating clamping leg One end of the rotating clamp leg can rotate around the fixed axis, and the other end and one end of the right-hand swing clamp leg form a right clamping mouth that can be opened and closed. The right-hand swing clamp leg rotates in the same direction as the right rotating clamp leg, and the other end of the right-hand swing clamp leg is always in contact with the right fixed cam contour curve; the left rotating clamp leg is driven by the left rotating clamp leg to rotate together, so that the left clamping mouth is forked into or leaves the cloth, and one end of the left swing clamp leg is in contact with different positions of the left fixed cam contour curve to open and close to clamp or release the cloth; similarly, the right rotating clamp leg is driven by the right rotating clamp leg to rotate together, so that the right clamping mouth is forked into or leaves the cloth, and one end of the right swing clamp leg is in contact with different positions of the right fixed cam contour curve to open and close to clamp and release the cloth; thereby realizing the lateral outward extension of the cloth or the deviation correction of the conveyed cloth.

2. The device that can be used for fabric deviation correction and spreading during fabric entry and exit according to claim 1, characterized in that, When spreading the cloth, the left rotating clamp leg and the right rotating clamp leg rotate around the corresponding axis driven by external power, thereby driving the left clamp and the right clamp to rotate. When the two sides of the cloth are respectively forked into the left clamp and the right clamp, the left clamp and the right clamp are in an open state, and will not generate lateral thrust on the cloth, and will not cause wrinkles on the cloth; when the left clamp and the right clamp further rotate away from the cloth, the left clamp and the right clamp are in a clamped state, which will clamp the cloth and apply a pulling force laterally away from the cloth, thereby realizing lateral outward spreading of the cloth.

3. The device that can be used for fabric deviation correction and spreading during fabric entry and exit according to claim 1, characterized in that, When the external deviation correction sensor detects that the fabric is axially deviated to a certain extent during the conveying process, it is necessary to correct the deviation of the fabric. For example, if the fabric deflects to the left, the right rotating clamp leg rotates around the corresponding axis under the drive of external power, driving the right clamp opening to rotate. When the fabric is inserted into the right clamp opening, the right clamp opening is in an open state. When the right clamp opening further rotates away from the fabric, it will be in a clamped state to hold the fabric area, applying a horizontally rightward pulling force to the right side of the fabric. And the external power drive that provides the rotational power for the left rotating clamp leg will not provide output power to the left rotating clamp leg, so the left clamp opening does not rotate, and thus no leftward pulling force will be generated on the left side of the fabric. Under the action of the rightward pulling force, the fabric is driven to deflect to the right, realizing the deviation correction of the conveyed fabric. On the contrary, if the fabric deflects to the right, the left rotating clamp leg rotates around the corresponding axis under the drive of external power, driving the left clamp opening to rotate. When the fabric is inserted into the left clamp opening, the left clamp opening is in an open state. When the left clamp opening further rotates away from the fabric, it will be in a clamped state to hold the fabric area, applying a horizontally leftward pulling force to the left side of the fabric. And the external power drive that provides the rotational power for the right rotating clamp leg will not provide output power to the right rotating clamp leg, so the right clamp opening does not rotate, and thus no rightward pulling force will be generated on the right side of the fabric. Under the action of the leftward pulling force, the fabric is driven to deflect to the left, also realizing the deviation correction of the conveyed fabric.

4. The device that can be used for fabric deviation correction and spreading during fabric entry and exit according to claim 1, characterized in that, The device includes a first cam, a first bearing upper cover, a first rolling bearing, a first flat key, a first nut, a first rotating shaft, a first rotating clamp leg, a first swinging clamp leg, a first elastic retaining ring, a second elastic retaining ring, a second swinging clamp leg, a second cam, a second rotating clamp leg, a second rolling bearing, a second bearing upper cover, a second rotating shaft, a fourth nut, a second flat key, a second retaining ring, a fifth nut, a second bearing lower cover, a second spring, a sixth nut, a second pin shaft, a third sleeve, a fourth sleeve, a third elastic retaining ring, a fourth elastic retaining ring, a first sleeve, a second sleeve, a first pin shaft, a third nut, a first spring, a second nut, a first retaining ring, and a first bearing lower cover; The first cam, the first bearing upper cover, the first rolling bearing, the first flat key, the first nut, the first rotating shaft, the first rotating clamp leg, the first swinging clamp leg, the first elastic retaining ring, the second elastic retaining ring, the first sleeve, the second sleeve, the first pin shaft, the third nut, the first spring, the second nut, the first retaining ring, and the first bearing lower cover constitute the left half of the device; One end of the first rotating clamp leg, one end of the first swinging clamp leg, the first elastic retaining ring, the second elastic retaining ring, the first sleeve, and the second sleeve construct the left clamp opening; The second swinging clamp leg, the second cam, the second rotating clamp leg, the second rolling bearing, the second bearing upper cover, the second rotating shaft, the fourth nut, the second flat key, the second retaining ring, the fifth nut, the second bearing lower cover, the second spring, the sixth nut, the second pin shaft, the third sleeve, the fourth sleeve, the third elastic retaining ring, and the fourth elastic retaining ring constitute the right half of the device; One end of the second swinging clamp leg, one end of the second rotating clamp leg, the third sleeve, the fourth sleeve, the third elastic retaining ring, and the fourth elastic retaining ring construct the right clamp opening; The upper cover of the first bearing is connected to the upper end of the first cam, and the lower cover of the first bearing is connected to the lower end of the first cam. The upper cover of the first bearing and the lower cover of the first bearing fix the first rolling bearing in the inner cavity of the first cam. The first rolling bearing is installed on the first rotating shaft. The second nut axially fixes the first rolling bearing on the first rotating shaft through the first retaining ring. One end of the first rotating shaft is connected to external power, and the other end forms a shaft-hub connection with the first rotating leg through the first flat key. The connection between the first nut and the first rotating shaft is a threaded connection, so that the first rotating leg is axially fixed on the first rotating shaft. The first rotating leg and the first swinging leg are installed on the first pin shaft and axially fixed on the first pin shaft through the third nut. Both the first rotating leg and the first swinging leg can rotate around the first pin shaft and form a rotating pair through the first pin shaft. The outer side of the second sleeve cylinder is wrapped with soft rubber and installed on the first swinging leg. The second sleeve can rotate on the first swinging leg and is axially fixed on the first swinging leg through the first elastic retaining ring. The outer side of the first sleeve cylinder is wrapped with soft rubber and installed on the first rotating leg. The first sleeve can rotate on the first rotating leg and is axially fixed on the first rotating leg through the second elastic retaining ring. The first spring is a tension spring and is connected between the first rotating leg and the first swinging leg. The upper cover of the second bearing is connected to the upper end of the second cam, and the lower cover of the second bearing is connected to the lower end of the second cam. The upper cover of the second bearing and the lower cover of the second bearing fix the second rolling bearing in the inner cavity of the second cam. The second rolling bearing is installed on the second rotating shaft. The fifth nut axially fixes the second rolling bearing on the second rotating shaft through the second retaining ring. One end of the second rotating shaft is connected to external power, and the other end forms a shaft-hub connection with the second rotating leg through the fourth nut. The connection between the fourth nut and the second rotating shaft is a threaded connection, so that the second rotating leg is axially fixed on the second rotating shaft. The second rotating leg and the second swinging leg are installed on the second pin shaft and axially fixed on the second pin shaft through the sixth nut. Both the second rotating leg and the second swinging leg can rotate around the second pin shaft and form a rotating pair through the second pin shaft. The outer side of the fourth sleeve cylinder is wrapped with soft rubber and installed on the second swinging leg. The fourth sleeve can rotate on the second swinging leg and is axially fixed on the second swinging leg through the fourth elastic retaining ring. The outer side of the third sleeve cylinder is wrapped with soft rubber and installed on the second rotating leg. The third sleeve can rotate on the second rotating leg and is axially fixed on the second rotating leg through the third elastic retaining ring. The second spring is a tension spring and is connected between the second rotating leg and the second swinging leg.

5. The device that can be used for fabric deviation correction and spreading during fabric entry and exit according to claim 4, characterized in that, The first cam is a disc cam. Between the phases of 10° and 90°, it is an arc with the minimum radius vector. Between the phases of 180° and 340°, it is an arc with the maximum radius vector. From the phase of 340° to 360° and from 0° to 10°, the radius vector gradually decreases according to the uniform motion law. From the phase of 90° to 180°, the radius vector gradually increases according to the uniform motion law. The second cam is also a disc cam. Between the phases of 90° and 170°, it is an arc with the minimum radius vector. Between the phases of 200° and 360°, it is an arc with the maximum radius vector. From the phase of 0° to 90°, the radius vector gradually decreases according to the uniform motion law. From the phase of 170° to 200°, the radius vector gradually increases according to the uniform motion law.

6. The device that can be used for fabric deviation correction and spreading during fabric entry and exit according to claim 4, characterized in that, The left half and the right half of the device are respectively placed on both sides of the conveyed cloth. The first cam and the second cam are fixed. The external power drives the first rotating shaft to rotate counterclockwise, driving the first rotating clamping leg to rotate counterclockwise, thereby driving the left clamping mouth to rotate around the axis of the first rotating shaft. In this way, the left clamping mouth can fork into or out of the cloth. Under the action of the first spring, one end of the first swinging clamping leg always contacts the contour curve of the first cam. When the first swinging clamping leg rotates around the first cam, it will perform a cycle of "swinging - stopping - swinging back - stopping". The left clamping mouth opens to enter the cloth and clamps the cloth when leaving the cloth, providing a leftward pulling force to the cloth. The external power drives the second rotating shaft to rotate clockwise, driving the second rotating clamping leg to rotate clockwise, thereby driving the right clamping mouth to rotate around the axis of the second rotating shaft. In this way, the right clamping mouth can fork into or out of the cloth. Under the action of the second spring, one end of the second swinging clamping leg always contacts the contour curve of the second cam. When the second swinging clamping leg rotates around the second cam, it will perform a cycle of "swinging - stopping - swinging back - stopping". The right clamping mouth opens to enter the cloth and clamps the cloth when leaving the cloth, providing a rightward pulling force to the cloth. The first sleeve and the second sleeve at the left clamping mouth and the third sleeve and the fourth sleeve at the right clamping mouth can rotate. The outer side of the cylinder body is wrapped with soft rubber, which can realize the clamping of cloths with different thicknesses and prevent the cloths from being stuck. When carrying out the cloth spreading work, the external power drives the first rotating shaft to rotate counterclockwise. When the left clamping mouth leaves the cloth, it generates a leftward pulling force on the cloth. The external power drives the second rotating shaft to rotate clockwise. When the right clamping mouth leaves the cloth, it generates a rightward pulling force on the cloth, so as to achieve the effect of stretching the cloth to both sides. When rectifying the deviation of the cloth conveying, if the cloth is biased to the left, the external control unit receives the signal that the left clamping mouth has left the cloth, and the external control unit will control the external power to stop supplying power to the first rotating shaft. The second rotating shaft rotates clockwise under the drive of the external power. When the right clamping mouth leaves the cloth, it generates a pulling force on the cloth to the right side, pulling the cloth to the right side to achieve the rectification of the cloth to the right side; if the cloth is biased to the right, the external control unit receives the signal that the right clamping mouth has left the cloth, and the external control unit will control the external power to stop supplying power to the second rotating shaft. The first rotating shaft rotates counterclockwise under the drive of the external power. When the left clamping mouth leaves the cloth, it generates a pulling force on the cloth to the left side, pulling the cloth to the left side to achieve the rectification of the cloth to the left side.

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