Fabric unwinding device

Abstract

The invention provides a fabric backing-off device which comprises a support assembly, a yarn guide assembly, a sample carrying roller and a plurality of backing-off rollers, the yarn guide assembly, the sample carrying roller and the backing-off rollers are arranged on the support assembly, the sample carrying roller is used for supporting and fixing a fabric sample, and the yarn guide assembly is used for separating yarn bundles extracted from backing-off point positions of the fabric sample into various types of target yarn; the yarn guide assembly is further used for monitoring a corresponding first tension signal of the yarn bundle before separation in real time, and synchronously regulating and controlling the rotating state of the sample loading roller based on the first tension signal; the yarn guide assembly is further used for monitoring a plurality of second tension signals in one-to-one correspondence after the multiple types of target yarns are separated in real time and synchronously regulating and controlling the rotating states of the multiple corresponding unwinding rollers in one-to-one correspondence based on the multiple second tension signals, then the unwinding progress of the multiple types of target yarns is balanced in real time, and finally the unwinding efficiency of the fabric sample is effectively improved. And the accuracy of subsequent detection data is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of textile equipment, and more specifically, relates to a fabric unwinding device. Background Art

[0002] At present, in the field of textile product trade and quality supervision, accurate detection of fabric fiber composition is the core link to ensure product compliance. According to current standards, fabric samples need to be unwound and disassembled into discrete yarn states so that quantitative detection of fiber components can be achieved through chemical dissolution or spectral analysis.

[0003] Among them, traditional unwinding devices usually use a combination of mechanical flattening and axial traction to separate the fabric sample layer by layer into single yarns, and use a collecting mechanism to directional store the unwound yarns. However, modern textile products mostly use a heterogeneous composite structure design, that is, specific functional characteristics are achieved through a combination of different materials or heterogeneous yarns. Therefore, after the various types of yarns are separated, due to the differences in mechanical properties of different yarns, it is necessary to timely adjust the unwinding speed of various types of yarns to maintain unwinding synchronization. However, traditional equipment lacks an adaptive control mechanism, forcing the operator to manually adjust the speed of the yarn guide roller to achieve dynamic balance, which not only increases labor intensity, but also easily leads to yarn tension imbalance, unwinding path deviation and other problems due to manual operation delays. In addition, with the dynamic changes in the unwinding point of the fabric sample based on the unwinding progress, the stability of the unwinding path is further reduced, which is easy to cause yarn breakage or structural damage, affecting the accuracy of subsequent test data. Summary of the invention

[0004] The purpose of the present application is to provide a fabric unwinding device, which aims to solve the problem that traditional equipment lacks an adaptive control mechanism, forcing the operator to manually adjust the rotation speed of the yarn guide roller to achieve dynamic balance, which not only increases labor intensity, but also easily leads to yarn tension imbalance, unwinding path deviation and other problems due to human operation lag. In addition, the unwinding point of the fabric sample changes dynamically based on the unwinding progress, which further reduces the stability of the unwinding path, easily leading to yarn breakage or structural damage, affecting the accuracy of subsequent detection data.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is to provide a fabric unwinding device, including a bracket assembly, and a yarn guide assembly, a sample roller and a plurality of unwinding rollers respectively arranged on the bracket assembly, the sample roller being used to support and fix the fabric sample, the yarn guide assembly being used to separate the yarn bundle extracted from the fabric sample unwinding point into multiple types of target yarns, and guide the multiple types of target yarns one by one to the corresponding multiple unwinding rollers, the yarn guide assembly is also used to monitor in real time the first tension signal corresponding to the yarn bundle before separation, and synchronously control the rotation state of the sample roller based on the first tension signal, the yarn guide assembly is also used to monitor in real time the multiple second tension signals corresponding to the multiple types of target yarns after separation, and synchronously control the rotation state of the corresponding multiple unwinding rollers based on the multiple second tension signals one by one.

[0006] In one of the embodiments, the yarn guiding assembly includes a driving displacement unit, a first yarn guiding unit, a second yarn guiding unit and a plurality of third yarn guiding units respectively arranged on the bracket assembly, the driving displacement unit is connected to the first yarn guiding unit along an axial direction parallel to the sample-carrying roller, the first yarn guiding unit is used to guide the yarn bundle extracted from the unwinding point to the second yarn guiding unit, the first yarn guiding unit is also used to monitor in real time the first tension signal corresponding to the yarn bundle when it passes through the first yarn guiding unit, and synchronously regulate the rotation state of the sample-carrying roller based on the first tension signal, and the corresponding driving displacement unit is used to drive the first yarn guiding unit along an axial direction parallel to the sample-carrying roller based on the first tension signal The first yarn guiding unit is synchronously driven to move in the axial direction of the drum, and the second yarn guiding unit is used to separate the yarn bundle guided by the first yarn guiding unit into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding units one by one. The corresponding multiple third yarn guiding units are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers one by one. The corresponding multiple third yarn guiding units are also used to monitor the corresponding multiple second tension signals corresponding to the multiple types of target yarns when they are wound around the corresponding multiple third yarn guiding units in real time, and synchronously regulate the rotation states of the corresponding multiple unwinding rollers based on the corresponding multiple second tension signals.

[0007] In one of the embodiments, the second yarn guide unit is also used to monitor in real time the first optical signal corresponding to the yarn bundle winding around the second yarn guide unit, and synchronously control the switching status of the sample loading roller and the corresponding multiple unwinding rollers based on the first optical signal.

[0008] In one embodiment, the first yarn guiding unit includes a first tension sensor arranged on the driving displacement unit, and a first yarn guiding hook body arranged on the monitoring port of the first tension sensor, the second yarn guiding unit includes a first optical sensor arranged on the bracket assembly, and a second yarn guiding hook body arranged in the monitoring area of ​​the first optical sensor, each third yarn guiding unit includes a second tension sensor arranged on the bracket assembly, and a third yarn guiding hook body arranged on the corresponding second tension sensor monitoring port, the first yarn guiding hook body is used to guide the yarn bundle extracted from the unwinding point to the second yarn guiding hook body, the first tension sensor is used to monitor the first tension signal corresponding to the yarn bundle when it is wound around the first yarn guiding hook body in real time, and synchronously regulate the rotation state of the sample loading roller based on the first tension signal, and the corresponding driving displacement unit is used to, based on the first tension signal, move along a direction parallel to the sample loading roller. The first tension sensor and the corresponding first yarn guide hook body are synchronously driven to move in the axial direction of the drum. The second yarn guide hook body is used to separate the yarn bundle guided by the first yarn guide hook body into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guide hook bodies one by one. The corresponding multiple third yarn guide hook bodies are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers one by one. The corresponding multiple second tension sensors are used to monitor the multiple second tension signals corresponding to the multiple types of target yarns when they are wound around the corresponding multiple third yarn guide hook bodies in real time, and synchronously control the rotation states of the corresponding multiple unwinding rollers based on the corresponding multiple second tension signals. The first optical sensor is used to monitor the first optical signal corresponding to the yarn bundle when it is wound around the second yarn guide hook body in real time, and synchronously control the switch states of the sample loading roller and the corresponding multiple unwinding rollers based on the first optical signal.

[0009] In one embodiment, the bracket assembly includes a support base and a support shell arranged on the support base, the sample-carrying roller includes a sample-carrying roller body, a first motor and a folding bracket, the sample-carrying roller body is arranged on the support base and extends along its own axis to the outside of the support base, the first motor is arranged inside the support base and is rotatably connected to the sample-carrying roller body, the folding bracket is arranged on the sample-carrying roller body for supporting and unfolding the fabric sample, each unwinding roller includes an unwinding roller body and a second motor, each unwinding roller body is respectively arranged on the support shell and respectively extends along its own axis to the outside of the support shell in parallel, each second motor is respectively arranged inside the support shell and is rotatably connected The sample-carrying rollers are connected to the corresponding unwinding rollers, and the axial direction of the sample-carrying rollers is perpendicular to the axial direction of the unwinding rollers. The driving displacement unit is arranged inside the supporting base and inside the supporting shell, and is driven to connect the first tension sensor and the corresponding first yarn guide hook on the outer wall of the supporting shell in parallel to the axial direction of the sample-carrying roller. The first optical sensor and the corresponding second yarn guide hook, as well as the second tension sensor and the corresponding third yarn guide hook are respectively arranged on the outer wall of the supporting shell, and the first tension sensor is controlled to be connected to the first motor accordingly, the first optical sensor is controlled to be connected to the first motor and the second motors accordingly, and the second tension sensors are controlled to be connected to the second motors accordingly one by one.

[0010] In one of the embodiments, the support shell is provided with an avoidance slot extending in parallel to the axial direction of the sample-carrying roller body, the driving displacement unit includes a screw shaft, a screw nut and a third motor, the screw shaft is arranged on the support base and extends along its own axial direction to the inside of the support shell, the screw shaft is connected to the screw nut in parallel to the axial direction of the sample-carrying roller body, the screw nut is passed through the avoidance slot and connected to the first tension sensor and the corresponding first yarn guide hook body on the outer wall of the support shell, the third motor is arranged inside the support base and is connected to the screw shaft for transmission, and the first tension sensor is correspondingly controlled to be connected to the third motor.

[0011] In one of the embodiments, each third yarn guide unit includes a fine-tuning slide rail and a locking knob, each fine-tuning slide rail is respectively arranged on the outer wall of the supporting shell, each second tension sensor is slidably connected to each fine-tuning slide rail one by one, and each locking knob is respectively penetrated through each second tension sensor, and is respectively used to rotate to abut the corresponding fine-tuning slide rail to lock the corresponding second tension sensor, or rotate to interval the corresponding fine-tuning slide rail to unlock the corresponding second tension sensor.

[0012] In one of the embodiments, the folding bracket includes a first rod body, an arc-shaped upper shell, multiple cantilever assemblies and multiple sample-carrying curved plates. A guide shaft hole is coaxially provided at one end of the sample-carrying roller body that faces away from the first motor. The first rod body is movably arranged in the guide shaft hole along the axial direction of the sample-carrying roller body. The arc-shaped upper shell is fixedly arranged at one end of the first rod body that faces away from the sample-carrying roller body. Multiple cantilever assemblies are respectively hinged on the sample-carrying roller body and are evenly arranged along the circumference of the sample-carrying roller body. Multiple sample-carrying curved plates are fixedly arranged on multiple cantilever assemblies one by one and are evenly arranged along the circumference of the sample-carrying roller body. Each sample-carrying curved plate is hinged to the arc-shaped upper shell at one end thereof. When the first rod body moves in a direction toward the sample-carrying roller body, the arc-shaped upper shell immediately drives each cantilever assemblies and each corresponding sample-carrying curved plate to expand accordingly. When the first rod body moves in a direction away from the sample-carrying roller body, the arc-shaped upper shell immediately drives each cantilever assemblies and each corresponding sample-carrying curved plate to fold accordingly.

[0013] In one embodiment, each cantilever assembly includes a first cantilever, a second cantilever and a supporting cantilever, one end of each first cantilever is hinged on the sample roller body, and the other end is hinged to the corresponding supporting cantilever, one end of each second cantilever is hinged to the sample roller body, and the other end is hinged to the corresponding supporting cantilever, when the first rod body moves in a direction toward the sample roller body, each first cantilever and each second cantilever and each corresponding supporting cantilever are relatively expanded, and when the first rod body moves in a direction away from the sample roller body, each first cantilever and each second cantilever and each corresponding supporting cantilever are relatively retracted.

[0014] In one of the embodiments, the folding bracket also includes a second rod, a fixed cone, a movable cone, a first spring, a second spring and a movable wedge, the second rod is coaxially arranged on an end portion of the first rod facing the sample roller, the fixed cone is fixedly arranged on an end portion of the second rod facing away from the first rod, the diameter of the first rod is larger than the diameter of the second rod to form a limiting annular surface at the joint, the movable cone is movably arranged on the second rod along the axial direction of the sample roller and is limited between the fixed cone and the limiting annular surface, the first spring is arranged on the limiting annular surface and coaxially arranged on the outer periphery of the second rod, the first spring is elastically connected to the movable cone to provide an elastic force to the movable cone along the axial direction of the sample roller facing away from the fixed cone, The sample roller body is also provided with a connecting shaft hole radially connected to the guide shaft hole, and a second spring is provided at an end portion of the connecting shaft hole facing away from the guide shaft hole, and the second spring elastically connects the movable wedge block to provide an elastic force to the movable wedge block along the radial direction of the sample roller body toward the guide shaft hole, so that the movable wedge block extends into the guide shaft hole and divides the guide shaft hole into an unlocking area adjacent to the first rod body and a locking area away from the first rod body along the axial direction of the sample roller body, a side of the fixed cone body facing the first rod body is provided with an abutting annular surface, a side of the movable cone body facing the first rod body is provided with a guiding cone surface, a side of the movable wedge block facing the first rod body is provided with a guiding portion, and a side of the movable wedge block facing away from the first rod body is provided with an abutting portion; Among them, when the first rod body moves in the direction toward the sample roller body, the fixed cone contacts the movable wedge block and then squeezes the guide part until the fixed cone enters the locking area from the unlocking area, and the corresponding abutment annular surface is used to abut the abutment part along the axial direction of the sample roller body to lock the first rod body; when the first rod body moves in the direction toward the sample roller body, the movable cone contacts the movable wedge block and then squeezes the guide part until the movable cone enters the locking area from the unlocking area, and then when the first rod body moves in the direction away from the sample roller body, the corresponding guide cone surface is used to squeeze the abutment part until the movable cone and the fixed cone enter the unlocking area from the locking area together to unlock the first rod body.

[0015] The beneficial effect of the fabric unwinding device provided by the present application is that, compared with the prior art, the fabric unwinding device of the present application includes a bracket assembly, and a yarn guide assembly, a sample loading roller and a plurality of unwinding rollers respectively arranged on the bracket assembly, wherein the sample loading roller is used to support and fix the fabric sample, the yarn guide assembly is used to separate the yarn bundle extracted from the fabric sample unwinding point into multiple types of target yarns, and guide the multiple types of target yarns one by one to the corresponding multiple unwinding rollers, and the yarn guide assembly is also used to monitor in real time the first tension signal corresponding to the yarn bundle before separation, and synchronously regulate the rotation state of the sample loading roller based on the first tension signal, so as to Based on the unwinding progress of the fabric sample, displacement compensation is performed on the unwinding point, so that the unwinding point can move within the preset path range, thereby improving the stability of the unwinding paths of various target yarns. The yarn guide assembly is also used to monitor in real time multiple second tension signals corresponding to each other after separation of multiple types of target yarns, and synchronously regulate the rotation states of the corresponding multiple unwinding rollers based on the one-to-one correspondence of the multiple second tension signals, thereby balancing the unwinding progress of various target yarns in real time, avoiding problems such as tension imbalance of some target yarns and deviation of the unwinding path of some target yarns, and ultimately effectively improving the unwinding efficiency of the fabric sample and ensuring the accuracy of subsequent detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a fabric unwinding device provided in one embodiment of the present application; Figure 2 for Figure 1 The schematic diagram of the main structure of the fabric unwinding device shown; Figure 3 for Figure 1 A schematic diagram of the structure of the fabric unwinding device when the sample-carrying roller is omitted; Figure 4 for Figure 1 A schematic structural diagram of a driving displacement unit in a fabric unwinding device shown; Figure 5 for Figure 1 A schematic structural diagram of a first yarn guiding unit in a fabric unwinding device is shown; Figure 6 for Figure 1 A schematic structural diagram of a second yarn guide unit in the fabric unwinding device shown; Figure 7 for Figure 1A schematic structural diagram of a third yarn guide unit in the fabric unwinding device shown; Figure 8 for Figure 1 A schematic diagram of the structure of a sample-carrying roller in a fabric unwinding device; Fig. 9 for Figure 8 A schematic diagram of a partial cross-sectional structure of an unwinding roller shown; Fig.10a for Figure 8 A schematic diagram of a partial cross-sectional structure of an unwinding roller in which a fixed cone is in a locking area and a movable cone is in an unlocking area; Fig.10b for Figure 8 A schematic diagram of a partial cross-sectional structure of an unwinding roller in which a fixed cone is in a locking area and a movable cone is in a locking area; Fig.10c for Figure 8 A schematic diagram of a partial cross-sectional structure of an unwinding roller in which a fixed cone is in an unlocking area and a movable cone is in an unlocking area; Fig.11 for Figure 1 The schematic diagram of the structure of the unwinding roller in the fabric unwinding device is shown.

[0018] In the figure: 10, fabric unwinding device; 100, bracket assembly; 110, support base; 120, support shell; 122, avoidance slot; 130, level; 140, leveling foot; 200, yarn guide assembly; 210, drive displacement unit; 211, screw shaft; 212, screw nut; 213, third motor; 220, first yarn guide unit; 221, first tension sensor; 222, first yarn guide hook; 230, second yarn guide unit; 231, first optical sensor; 232, second yarn guide hook; 240, third yarn guide unit; 241, second tension sensor; 242, third yarn guide hook; 243, fine-tuning slide rail; 244, locking knob; 300, sample roller; 310, sample roller body; 311, guide shaft hole; 312, connecting shaft hole; 320, first motor; 330, folding bracket; 331, first rod body; 3311, limiting annular surface; 332, arc-shaped upper shell; 333, cantilever assembly; 3331, first cantilever; 3332, second cantilever; 3333, supporting cantilever; 334, sample loading curved plate; 341, second rod body; 342, fixed cone; 3421, abutting annular surface; 343, movable cone; 3431, guide cone surface; 344, first spring; 345, second spring; 346, movable wedge; 3461, guide part; 3462, abutting part; 400, unwinding roller; 410, unwinding roller body; 420, second motor; 430, winding clip; 20, fabric sample. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] Please also read Figure 1 and Figure 2, the fabric unwinding device 10 provided in one embodiment of the present application is now described, the fabric unwinding device 10 comprises a support assembly 100, a yarn guide assembly 200, a sample loading roller 300 and a plurality of unwinding rollers 400, wherein the yarn guide assembly 200, the sample loading roller 300 and each unwinding roller 400 are respectively arranged on the support assembly 100, the sample loading roller 300 is used to support and fix the fabric sample 20, the yarn guide assembly 200 is used to separate the yarn bundle extracted from the unwinding point of the fabric sample 20 into multiple types of target yarns, and guide the multiple types of target yarns one by one to the corresponding multiple unwinding rollers 4 00, the yarn guide assembly 200 is also used to monitor in real time the first tension signal corresponding to the yarn bundle before separation, and synchronously regulate the rotation state of the sample loading roller 300 based on the first tension signal, and then perform displacement compensation for the unwinding point based on the unwinding progress of the fabric sample 20, so that the unwinding point can move within the preset path range. The yarn guide assembly 200 is also used to monitor in real time a plurality of second tension signals corresponding to a plurality of types of target yarns after separation, and synchronously regulate the rotation states of the corresponding plurality of unwinding rollers 400 based on the one-to-one correspondence of the plurality of second tension signals, so as to balance the unwinding progress of various types of target yarns in real time.

[0024] It should be noted that each type of target yarn includes one target yarn, or multiple target yarns with consistent mechanical properties. In addition, the yarn guide assembly 200 is used to synchronously control the rotation state of the sample-carrying roller 300 based on the first tension signal, wherein the rotation state of the sample-carrying roller 300 specifically includes the rotation speed of the sample-carrying roller 300, and the rotation direction of the sample-carrying roller 300. The yarn guide assembly 200 is used to synchronously control the rotation state of the corresponding multiple unwinding rollers 400 based on the second tension signal, wherein the rotation state of the unwinding roller 400 specifically includes the rotation speed of the unwinding roller 400; it can be understood that the mechanical properties of each type of target yarn include tensile strength, elastic modulus and stress relaxation and other properties. Generally speaking, the mechanical properties of target yarns of the same material and consistent weaving parameters are correspondingly consistent.

[0025] The beneficial effect of the fabric unwinding device 10 provided in the present application lies in that, compared with the prior art, the fabric unwinding device 10 of the present application monitors the first tension signal corresponding to the yarn bundle before separation in real time, and synchronously controls the rotation state of the sample loading roller 300 based on the first tension signal, and then performs displacement compensation for the unwinding point based on the unwinding progress of the fabric sample 20, so that the unwinding point can move within the preset path range, effectively improving the stability of the unwinding path of various target yarns, and by real-time monitoring of multiple second tension signals corresponding to multiple types of target yarns after separation, and synchronously controlling the rotation states of the corresponding multiple unwinding rollers 400 based on the multiple second tension signals, the unwinding progress of various target yarns is balanced in real time, avoiding problems such as tension imbalance of some target yarns and deviation of the unwinding path of some target yarns, and ultimately effectively improving the unwinding efficiency of the fabric sample 20 and ensuring the accuracy of subsequent detection data.

[0026] See also Figure 1 and Figure 2 In the present embodiment, the bracket assembly 100 comprises a supporting base 110 and a supporting shell 120, wherein the supporting shell 120 is fixedly disposed on the supporting base 110 and covers a portion of the surface at the top of the supporting base 110, the yarn guide assembly 200 is respectively disposed on the supporting base 110 and the supporting shell 120, the sample loading roller 300 is rotatably connected to the supporting base 110, and each unwinding roller 400 is respectively rotatably connected to the supporting shell 120, a spirit level 130 is further disposed on the top of the supporting base 110, and a plurality of leveling feet 140 are further disposed on the bottom of the supporting base 110, which are used to adjust the supporting base 110 to a horizontal state.

[0027] Please also read Figure 3 and Figure 4In this embodiment, the yarn guide assembly 200 includes a driving displacement unit 210, a first yarn guide unit 220, a second yarn guide unit 230 and a plurality of third yarn guide units 240, wherein the driving displacement unit 210 is respectively arranged on the support base 110 and the support shell 120, the first yarn guide unit 220, the second yarn guide unit 230 and the plurality of third yarn guide units 240 are respectively arranged on the support shell 120, and the driving displacement unit 210 is connected to the first yarn guide unit 220 along the axial direction parallel to the sample loading roller 300. The yarn unit 220, the first yarn guide unit 220 is used to guide the yarn bundle extracted from the unwinding point to the second yarn guide unit 230, the first yarn guide unit 220 is also used to monitor the first tension signal corresponding to the yarn bundle when it is wound around the first yarn guide unit 220 in real time, and synchronously adjust the rotation state of the sample-carrying roller 300 based on the change trend of the first tension signal, and the corresponding driving displacement unit 210 is used to synchronously drive the first yarn guide unit 220 along the axis parallel to the sample-carrying roller 300 based on the change trend of the first tension signal The first yarn guide unit 220 is driven to move synchronously along the axis parallel to the sample-carrying roller 300 based on the unwinding progress of the fabric sample 20, so that the distance between the unwinding point of the fabric sample 20 and the first yarn guide unit 220 along the axis parallel to the sample-carrying roller 300 is maintained within a preset range, thereby ensuring that the first yarn guide unit 220 can continuously monitor a relatively stable first tension signal. The second yarn guide unit 230 is used to separate the yarn bundle guided by the first yarn guide unit 220 into multiple types of target yarns, and guide the multiple types of target yarns one by one to the corresponding multiple third yarn guide units 240. The corresponding multiple third yarn guide units 240 are used to guide the corresponding multiple types of target yarns one by one to the corresponding multiple unwinding rollers 400. The corresponding multiple third yarn guide units 240 are also used to monitor the multiple second tension signals corresponding to the multiple types of target yarns when they are wound around the corresponding multiple third yarn guide units 240 in real time, and synchronously adjust the rotation state of the corresponding multiple unwinding rollers 400 based on the change trend of the corresponding multiple second tension signals.

[0028] It should be noted that in this embodiment, when the yarn bundle guided by the above-mentioned first yarn guide unit 220 is wound around the second yarn guide unit 230, the yarn bundle can be manually separated into multiple types of target yarns, and then the multiple types of target yarns can be guided one by one to the corresponding multiple third yarn guide units 240 through the second yarn guide unit 230.

[0029] It should be noted that, in the present embodiment, the above-mentioned second yarn guide unit 230 is fixedly arranged on the supporting shell 120, so that the multiple guiding paths of the multiple types of target yarns from the second yarn guide unit 230 to the corresponding multiple types of third yarn guide units 240 remain stable, which facilitates the multiple third yarn guide units 240 to monitor the relatively stable multiple second tension signals in real time.

[0030] Furthermore, in the present embodiment, the second yarn guide unit 230 is also used to monitor in real time the first optical signal corresponding to the yarn bundle winding through the second yarn guide unit 230, and synchronously regulate the switch states of the sample loading roller 300 and the corresponding multiple unwinding rollers 400 based on the change of the first optical signal, so that when a relatively short specific yarn (such as jacquard yarn) that does not need to be unwound is mixed into the yarn bundle, causing the first optical signal to deviate from the preset value, the second yarn guide unit 230 can immediately stop loading the sample roller 300. and the corresponding multiple unwinding rollers 400, and when the first optical signal recovers to the preset value after the specific yarn is taken away, the second yarn guiding unit 230 can immediately start the sample-carrying roller 300 and the corresponding multiple unwinding rollers 400. Specifically, when the first optical signal recovers to the preset value after the specific yarn is taken away, the second yarn guiding unit 230 immediately restarts the sample-carrying roller 300 and the corresponding multiple unwinding rollers 400, and gradually restores the sample-carrying roller 300 and the corresponding multiple unwinding rollers 400 to the operating state before stopping.

[0031] Please also read Figure 5 , Figure 6 and Figure 7In this embodiment, the first yarn guiding unit 220 includes a first tension sensor 221 and a first yarn guiding hook body 222, the first tension sensor 221 is arranged on the driving displacement unit 210, and the first yarn guiding hook body 222 is arranged on the monitoring port of the first tension sensor 221, the second yarn guiding unit 230 includes a first optical sensor 231 and a second yarn guiding hook body 232, the first optical sensor 231 is arranged on the supporting shell 120, and the second yarn guiding hook body 232 is arranged on the monitoring area of ​​the first optical sensor 231, and each third yarn guiding unit 240 is It includes a second tension sensor 241 and a third yarn guide hook body 242, each second tension sensor 241 is movably arranged on the support shell 120, and each third yarn guide hook body 242 is arranged on the monitoring port of the corresponding second tension sensor 241, wherein the first yarn guide hook body 222 is used to guide the yarn bundle extracted from the unwinding point to the second yarn guide hook body 232, and the first tension sensor 221 is used to monitor the first tension signal corresponding to the yarn bundle when it is wound around the first yarn guide hook body 222 in real time, and synchronously adjust the sample loading roller based on the change trend of the first tension signal The corresponding driving displacement unit 210 is used to synchronously drive the first tension sensor 221 and the corresponding first yarn guide hook body 222 to move along the axial direction parallel to the sample-carrying roller 300 based on the change trend of the first tension signal, and the second yarn guide hook body 232 is used to separate the yarn bundle guided by the first yarn guide hook body 222 into multiple types of target yarns, and guide the multiple types of target yarns one by one to the corresponding multiple third yarn guide hook bodies 242, and the corresponding multiple third yarn guide hook bodies 242 are used to guide the corresponding multiple types of target yarns one by one to the corresponding multiple unwinding rollers 4 00, the corresponding multiple second tension sensors 241 are used to monitor in real time the multiple second tension signals corresponding to the multiple types of target yarns when they are wound around the corresponding multiple third yarn guide hooks 242, and based on the change trends of the corresponding multiple second tension signals, the rotation states of the corresponding multiple unwinding rollers 400 are synchronously adjusted one by one. The first optical sensor 231 is used to monitor in real time the first optical signal corresponding to the yarn bundle when it is wound around the second yarn guide hook 232, and based on the changes of the first optical signal, the switch states of the sample loading roller 300 and the corresponding multiple unwinding rollers 400 are synchronously adjusted.

[0032] It should be noted that, in the present embodiment, the above-mentioned fabric sample 20 is accompanied by dynamic changes in the unwinding point during the unwinding process, and part of the target yarn may slightly deviate from the corresponding third yarn guide hook body 242 in some cases, thereby causing the corresponding target yarn to lose contact with the corresponding third yarn guide hook body 242, making it impossible for the corresponding third yarn guide hook body 242 to provide guidance for the corresponding target yarn, and making it impossible for the corresponding second tension sensor 241 to monitor the corresponding second tension signal corresponding to the corresponding target yarn when it is wound around the corresponding third yarn guide hook body 242. By movably setting the second tension sensors 241 on the supporting shell 120, when facing the above situation, the position of the corresponding second tension sensor 241 can be slightly adjusted within a predetermined range, so that the corresponding third yarn guide hook body 242 can regain contact with the corresponding target yarn.

[0033] Specifically, in this embodiment, each of the above-mentioned third yarn guide units 240 includes a fine-tuning slide rail 243 and a locking knob 244. The multiple fine-tuning slide rails 243 of each third yarn guide unit 240 are arranged in parallel with each other and are respectively provided on the outer wall of the support shell 120. Each second tension sensor 241 is slidably connected to each fine-tuning slide rail 243 one by one. Each locking knob 244 is correspondingly penetrated through each second tension sensor 241 and is respectively used to rotate and abut against the corresponding fine-tuning slide rail 243 to lock the corresponding second tension sensor 241, or rotate and separate from the corresponding fine-tuning slide rail 243 to unlock the corresponding second tension sensor 241.

[0034] Please also read Figure 8 and Fig.11In this embodiment, the sample-carrying roller 300 includes a sample-carrying roller body 310 and a first motor 320. The sample-carrying roller body 310 is disposed on the support base 110 and extends to the outside of the support base 110 along its own axial direction (the axial direction of the sample-carrying roller body 310 is the axial direction of the sample-carrying roller 300). The first motor 320 is disposed inside the support base 110 and is rotatably connected to the sample-carrying roller body 310. Each unwinding roller 400 includes an unwinding roller body 410 and a second motor 420. Each unwinding roller body 410 is respectively disposed on the support base 110. The outer shell 120 is provided with a winding clip 430 for elastically clamping and fixing the end of the corresponding target yarn. The second motors 420 are respectively arranged inside the supporting shell 120 and are rotatably connected to the corresponding unwinding rollers 410. The axes of the sample-carrying rollers 310 are perpendicular to the axes of the unwinding rollers 410. The driving displacement unit 210 is arranged on the supporting base 110. The interior and the interior of the supporting shell 120 are driven and connected to the first tension sensor 221 and the corresponding first yarn guide hook body 222 on the outer wall of the supporting shell 120 along the axial direction parallel to the sample-carrying roller body 310. The first optical sensor 231 and the corresponding second yarn guide hook body 232, as well as the second tension sensor 241 and the corresponding third yarn guide hook body 242 are respectively arranged on the outer wall of the supporting shell 120, and the first tension sensor 221 is remotely controlled and connected to the first motor 320 accordingly, and then the rotation direction and rotation speed of the first motor 320 are synchronously regulated based on the changing trend of the first tension signal. The first optical sensor 231 is remotely controlled and connected to the first motor 320 and each second motor 420 accordingly, and then the switching state of the first motor 320 and each second motor 420 is synchronously regulated based on the changing situation of the first optical signal. Each second tension sensor 241 is remotely controlled and connected to each second motor 420 accordingly, and then the rotation speed of multiple second motors 420 is synchronously regulated based on the changing trend of the corresponding multiple second tension signals.

[0035] Furthermore, in the present embodiment, the sample loading roller 300 further includes a sample loading base (not shown in the figure), the sample loading base is fixedly disposed on the support base 110, the first motor 320 is fixedly disposed on the sample loading base and is located inside the support base 110, the sample loading roller body 310 is passed through the sample loading base and extends along its own axis to the outside of the support base 110 through the sample loading base, and the sample loading base is suitable for further providing a fixing and packaging effect for the sample loading roller body 310 and the first motor 320.

[0036] Furthermore, in the present embodiment, a plurality of support columns (not shown) are arranged on the top of the support base 110, and the plurality of support columns are arranged adjacent to each other in sequence inside the support shell 120, and the top of each support column is fixedly connected to each second motor 420 in a one-to-one correspondence, and each support column is respectively suitable for adapting to raising the corresponding second motor 420, so that each unwinding roller body 410 correspondingly rotatably connected to each second motor 420 is in an appropriate position area.

[0037] Please also read Figure 3 and Figure 4 In this embodiment, the support shell 120 is provided with an avoidance slot 122 extending in parallel to the axial direction of the sample-carrying roller body 310. The driving displacement unit 210 includes a screw shaft 211, a screw nut 212 and a third motor 213. The screw shaft 211 is rotatably arranged on the support base 110 through a screw bearing and extends axially to the inside of the support shell 120. The screw nut 212 is sleeved on the screw shaft 211, so that the screw shaft 211 extends in parallel to the sample-carrying roller body 310. The lead screw nut 212 is axially driven and connected. The lead screw nut 212 is inserted into the avoidance slot 122 and connected to the first tension sensor 221 and the corresponding first yarn guide hook 222 on the outer wall of the support shell 120. The third motor 213 is arranged inside the support base 110 and is transmission-connected to the lead screw shaft 211. The first tension sensor 221 is remotely controlled and connected to the third motor 213 accordingly, so as to synchronously regulate the rotation direction and rotation speed of the third motor 213 based on the change trend of the first tension signal.

[0038] Furthermore, in some other embodiments, the above-mentioned driving displacement unit 210 includes a linear driving guide rail, which is arranged inside the supporting shell 120 along an axial direction parallel to the sample-carrying roller 310, and the sliding structure in the linear driving guide rail is passed through the avoidance slot 122 and connects the first tension sensor 221 and the corresponding first yarn guide hook 222 on the outer wall of the supporting shell 120.

[0039] Furthermore, in the present embodiment, the sample loading roller 300 further includes a folding bracket 330, which is disposed on the sample loading roller body 310 and is used to support and unfold the fabric sample 20. In particular, for tubular fabric samples 20 (such as socks and hats), supporting and unfolding the fabric sample 20 through the folding bracket 330 can provide appropriate tension to the fabric sample 20, thereby facilitating the unwinding of the fabric sample 20.

[0040] See also Fig. 9In this embodiment, the folding bracket 330 includes a first rod body 331, an arc-shaped upper shell 332, a plurality of cantilever components 333 and a plurality of sample-carrying curved plates 334, wherein a guide shaft hole 311 is coaxially provided at one end of the roller body that is opposite to the first motor 320, the first rod body 331 is movably arranged in the guide shaft hole 311 along the axial direction of the sample-carrying roller body 310, the arc-shaped upper shell 332 is fixedly arranged at one end of the first rod body 331 that is opposite to the sample-carrying roller body 310, a plurality of cantilever components 333 are respectively hinged on the sample-carrying roller body 310 and are evenly arranged along the circumference of the sample-carrying roller body 310, and a plurality of sample-carrying curved plates 334 are fixedly arranged on a plurality of cantilever components 333 in a one-to-one correspondence and are arranged along the sample-carrying roller body 310 are evenly arranged in the circumferential direction, and each sample-carrying curved plate 334 is hinged on the arc-shaped upper shell 332 at one end facing the arc-shaped upper shell 332. The arc-shaped upper shell 332 and the corresponding multiple sample-carrying curved plates 334 cooperate to form an umbrella-shaped structure, and when the first rod body 331 moves in the direction away from the sample-carrying roller body 310, the arc-shaped upper shell 332 immediately and synchronously drives each cantilever assembly 333 and each corresponding sample-carrying curved plate 334 to be retracted accordingly, so as to be suitable for sleeve fixing the fabric sample 20. When the first rod body 331 moves in the direction toward the sample-carrying roller body 310, the arc-shaped upper shell 332 immediately and synchronously drives each cantilever assembly 333 and each corresponding sample-carrying curved plate 334 to be unfolded accordingly, so as to be suitable for supporting the unfolded fabric sample 20.

[0041] Specifically, in the present embodiment, each of the cantilever assemblies 333 comprises a first cantilever 3331, a second cantilever 3332 and a supporting cantilever 3333, wherein one end of each first cantilever 3331 is hinged on the sample roller body 310, and the other end is hinged on one end of the corresponding supporting cantilever 3333, one end of each second cantilever 3332 is hinged on the sample roller body 310, and the other end is hinged on the other end opposite to the corresponding supporting cantilever 3333, when the first rod body 331 moves in a direction away from the sample roller body 310, each first cantilever 3331 and each second cantilever 3332 are relatively retracted from the corresponding supporting cantilever 3333, and when the first rod body 331 moves in a direction toward the sample roller body 310, each first cantilever 3331 and each second cantilever 3332 are relatively expanded from the corresponding supporting cantilever 3333.

[0042] Please also read Fig.10a , Fig.10b and Fig.10cIn this embodiment, the folding bracket 330 further includes a second rod 341, a fixed cone 342, a movable cone 343, a first spring 344, a second spring 345 and a movable wedge 346, wherein the second rod 341 is coaxially arranged at one end of the first rod 331 facing the sample roller 310, the fixed cone 342 is fixedly arranged at one end of the second rod 341 facing away from the first rod 331, the diameter of the first rod 331 is larger than the diameter of the second rod 341, and thus a connection (opposite to the connection) is formed at the junction of the first rod 331 and the second rod 341. The movable cone 343 is movably arranged on the second rod 341 along the axial direction of the sample roller 310 and is limited between the fixed cone 342 and the limiting ring surface 3311. The first spring 344 is arranged on the limiting ring surface 3311 and is coaxially arranged on the outer periphery of the second rod 341. The first spring 344 is elastically connected to the movable cone 343 and is used to provide the movable cone 343 with an elastic force along the axial direction of the sample roller 310 facing away from the fixed cone 342. Therefore, in the natural state (such as when the sample roller 310 is vertically arranged), the movable cone 343 can The movable cone 343 is relatively spaced from the fixed cone 342 along the axial direction of the movable cone 343. A connecting shaft hole 312 is further provided in the sample-carrying roller body 310 and is connected to the guide shaft hole 311 along its own radial direction. A second spring 345 is provided at one end of the connecting shaft hole 312 facing away from the guide shaft hole 311. The second spring 345 is elastically connected to the movable wedge block 346 and is used to provide an elastic force to the movable wedge block 346 along the radial direction of the sample-carrying roller body 310 toward the guide shaft hole 311, so that the movable wedge block 346 extends into the guide shaft hole 311 and divides the guide shaft hole 311 into two adjacent rods 33 along the axial direction of the sample-carrying roller body 310. 1, and a locking area away from the first rod body 331, wherein the area between the shaft hole opening of the guide shaft hole 311 and the movable wedge block 346 is the unlocking area, and the area between the movable wedge block 346 and the bottom of the shaft hole is the locking area, the fixed cone 342 is provided with an abutting annular surface 3421 on the side facing the first rod body 331, the movable cone 343 is provided with a guiding cone surface 3431 on the side facing the first rod body 331, the movable wedge block 346 is provided with a guiding portion 3461 on the side facing the first rod body 331, and the movable wedge block 346 is provided with an abutting portion 3462 on the side facing away from the first rod body 331.

[0043] Then, when the first rod 331 moves in the direction toward the sample-carrying roller 310, the fixed cone 342 contacts the movable wedge 346 and then presses the guide portion 3461 of the movable wedge 346 in the same direction until the fixed cone 342 enters the locking area from the unlocking area (such as Fig.10aAs shown in the figure, the corresponding abutment annular surface 3421 is used to abut the abutment portion 3462 of the limiting movable wedge block 346 along the axial direction of the sample roller body 310 to lock the first rod body 331, so that each first cantilever 3331 and each second cantilever 3332 and each corresponding supporting cantilever 3333 remain in an expanded state. On the basis of the above, when the first rod body 331 continues to move in the direction toward the sample roller body 310, the movable cone 343 contacts the movable wedge block 346 and then squeezes the guide portion 3461 of the movable wedge block 346 until the movable cone 343 enters the locking area from the unlocking area (as shown in the figure). Fig.10b As shown in FIG. 1 ), when the first rod 331 moves in a direction away from the sample-carrying roller 310, the corresponding guide cone 3431 is used to squeeze the abutment portion 3462 of the movable wedge 346 until the movable cone 343 and the fixed cone 342 enter the unlocking area from the locking area (as shown in FIG. 1 ). Fig.10c ) to unlock the first rod body 331, so that each first cantilever 3331 and each second cantilever 3332 and each corresponding supporting cantilever 3333 remain in a retracted state.

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fabric unwinding device, characterized in that: It includes a bracket assembly, and a yarn guide assembly, a sample roller and a plurality of unwinding rollers respectively arranged on the bracket assembly, the sample roller is used to support and fix the fabric sample; the yarn guide assembly includes a driving displacement unit, a first yarn guide unit, a second yarn guide unit and a plurality of third yarn guide units respectively arranged on the bracket assembly, the driving displacement unit is connected to the first yarn guide unit along an axial direction parallel to the sample roller, the first yarn guide unit is used to guide the yarn bundle extracted from the unwinding point of the fabric sample to the second yarn guide unit, the first yarn guide unit is also used to monitor in real time the first tension signal corresponding to the yarn bundle when it is wound around the first yarn guide unit, and synchronously regulate the rotation state of the sample roller based on the first tension signal, and the corresponding The driving displacement unit is used to synchronously drive the first yarn guiding unit to move along the axis parallel to the sample loading roller based on the first tension signal; the second yarn guiding unit is used to separate the yarn bundle guided by the first yarn guiding unit into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding units one by one; the corresponding multiple third yarn guiding units are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers one by one; the corresponding multiple third yarn guiding units are also used to monitor the corresponding multiple second tension signals when the multiple types of target yarns are wound around the corresponding multiple third yarn guiding units in real time, and synchronously regulate the rotation state of the corresponding multiple unwinding rollers based on the corresponding multiple second tension signals.

2. The fabric unwinding device according to claim 1, characterized in that: The second yarn guiding unit is also used to monitor in real time the first optical signal corresponding to the yarn bundle when it is wound around the second yarn guiding unit, and to synchronously control the switching status of the sample loading roller and the corresponding multiple unwinding rollers based on the first optical signal.

3. The fabric unwinding device according to claim 2, characterized in that: The first yarn guiding unit includes a first tension sensor arranged on the driving displacement unit and a first yarn guiding hook body arranged on the monitoring port of the first tension sensor. The second yarn guiding unit includes a first optical sensor arranged on the bracket assembly and a second yarn guiding hook body arranged in the monitoring area of ​​the first optical sensor. Each of the third yarn guiding units includes a second tension sensor arranged on the bracket assembly and a third yarn guiding hook body arranged on the corresponding monitoring port of the second tension sensor. The first yarn guiding hook body is used to guide the yarn bundle extracted from the unwinding point to the second yarn guiding hook body. The first tension sensor is used to monitor the first tension signal corresponding to the yarn bundle when it is wound around the first yarn guiding hook body in real time, and synchronously regulate the rotation state of the sample loading roller based on the first tension signal. The corresponding driving displacement unit is used to synchronously drive the sample loading roller in an axial direction parallel to the axial direction of the sample loading roller based on the first tension signal. The first tension sensor and the corresponding first yarn guide hook body move, the second yarn guide hook body is used to separate the yarn bundle after being guided by the first yarn guide hook body into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guide hook bodies one by one, the corresponding multiple third yarn guide hook bodies are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers one by one, the corresponding multiple second tension sensors are used to monitor the multiple second tension signals corresponding to the multiple types of target yarns when they are wound around the corresponding multiple third yarn guide hook bodies in real time, and synchronously control the rotation status of the corresponding multiple unwinding rollers based on the corresponding multiple second tension signals one by one, the first optical sensor is used to monitor the first optical signal corresponding to the yarn bundle when it is wound around the second yarn guide hook body in real time, and synchronously control the switch status of the sample loading roller and the corresponding multiple unwinding rollers based on the first optical signal.

4. The fabric unwinding device according to claim 3, characterized in that: The bracket assembly includes a support base and a support shell arranged on the support base, the sample-carrying roller includes a sample-carrying roller body, a first motor and a folding bracket, the sample-carrying roller body is arranged on the support base and extends along its own axis to the outside of the support base, the first motor is arranged inside the support base and rotatably connected to the sample-carrying roller body, the folding bracket is arranged on the sample-carrying roller body for supporting and unfolding the fabric sample, each of the unwinding rollers includes an unwinding roller body and a second motor, each of the unwinding roller bodies is respectively arranged on the support shell and extends along its own axis in parallel to the outside of the support shell, each of the second motors is respectively arranged inside the support shell and rotatably connected to the corresponding unwinding roller body. The roller body, the axial direction of the sample-carrying roller body is perpendicular to the axial direction of each unwinding roller body, the driving displacement unit is arranged inside the supporting base and inside the supporting shell, and is driven to connect the first tension sensor and the corresponding first yarn guide hook body on the outer wall of the supporting shell in parallel to the axial direction of the sample-carrying roller body, the first optical sensor and the corresponding second yarn guide hook body, and the second tension sensor and the corresponding third yarn guide hook body are respectively arranged on the outer wall of the supporting shell, and the first tension sensor is correspondingly controlled to be connected to the first motor, the first optical sensor is correspondingly controlled to be connected to the first motor and each second motor, and each second tension sensor is correspondingly controlled to be connected to each second motor one by one.

5. The fabric unwinding device according to claim 4, characterized in that: The support shell is provided with an avoidance slot extending in parallel with the axial direction of the sample-carrying roller body, the driving displacement unit includes a screw shaft, a screw nut and a third motor, the screw shaft is arranged on the support base and extends along its own axial direction to the inside of the support shell, the screw shaft is connected to the screw nut in a drive manner parallel to the axial direction of the sample-carrying roller body, the screw nut is passed through the avoidance slot and connected to the first tension sensor and the corresponding first yarn guide hook on the outer wall of the support shell, the third motor is arranged inside the support base and is transmission-connected to the screw shaft, and the first tension sensor is correspondingly controlled to connect to the third motor.

6. The fabric unwinding device according to claim 4, characterized in that: Each of the third yarn guide units includes a fine-tuning slide rail and a locking knob, each of the fine-tuning slide rails is respectively arranged on the outer wall of the supporting shell, each of the second tension sensors is slidably connected to each of the fine-tuning slide rails, and each of the locking knobs is correspondingly penetrated through each of the second tension sensors, and is respectively used to rotate to abut against the corresponding fine-tuning slide rail to lock the corresponding second tension sensor, or rotate to separate from the corresponding fine-tuning slide rail to unlock the corresponding second tension sensor.

7. The fabric unwinding device according to claim 6, characterized in that: The folding bracket includes a first rod body, an arc-shaped upper shell, a plurality of cantilever assemblies and a plurality of sample-carrying curved plates. The sample-carrying roller body is coaxially provided with a guide shaft hole at one end thereof facing away from the first motor. The first rod body is movably arranged in the guide shaft hole along the axial direction of the sample-carrying roller body. The arc-shaped upper shell is fixedly arranged at one end of the first rod body facing away from the sample-carrying roller body. The plurality of cantilever assemblies are respectively hinged on the sample-carrying roller body and are evenly arranged along the circumference of the sample-carrying roller body. The plurality of sample-carrying curved plates are fixedly arranged one by one in correspondence with each other. It is placed on multiple cantilever assemblies and evenly arranged along the circumference of the sample roller body, and each sample-carrying curved plate is hinged on the arcuate upper shell at one end facing the arcuate upper shell. When the first rod body moves in the direction toward the sample roller body, the arcuate upper shell immediately and synchronously drives each cantilever assembly and each corresponding sample-carrying curved plate to expand accordingly. When the first rod body moves in the direction away from the sample roller body, the arcuate upper shell immediately and synchronously drives each cantilever assembly and each corresponding sample-carrying curved plate to fold accordingly.

8. The fabric unwinding device according to claim 7, characterized in that: Each of the cantilever assemblies includes a first cantilever, a second cantilever and a supporting cantilever. One end of each of the first cantilever is hinged to the sample roller body, and the other end is hinged to the corresponding supporting cantilever. One end of each of the second cantilever is hinged to the sample roller body, and the other end is hinged to the corresponding supporting cantilever. When the first rod body moves in a direction toward the sample roller body, each of the first cantilever and each of the second cantilever are relatively expanded from the corresponding supporting cantilever. When the first rod body moves in a direction away from the sample roller body, each of the first cantilever and each of the second cantilever are relatively retracted from the corresponding supporting cantilever.

9. The fabric unwinding device according to claim 8, characterized in that: The folding bracket also includes a second rod body, a fixed cone, a movable cone, a first spring, a second spring and a movable wedge, the second rod body being coaxially arranged on an end portion of the first rod body facing the sample-carrying roller body, the fixed cone being fixedly arranged on an end portion of the second rod body facing away from the first rod body, the diameter of the first rod body being larger than the diameter of the second rod body to form a limiting annular surface at the joint, the movable cone being movably arranged on the second rod body along the axial direction of the sample-carrying roller body and limited between the fixed cone and the limiting annular surface, the first spring being arranged on the limiting annular surface and coaxially arranged on the outer periphery of the second rod body, the first spring being elastically connected to the movable cone to provide the movable cone with an elastic force along the axial direction of the sample-carrying roller body and away from the fixed cone direction, the inside of the sample-carrying roller body The cam is configured to move the spring member to a position adjacent to the guide shaft hole and to move the spring member to a position adjacent to the guide shaft hole when the cam member is in the forward direction. Among them, when the first rod body moves in the direction toward the sample roller body, the fixed cone contacts the movable wedge block and then squeezes the guide portion until the fixed cone enters the locking area from the unlocking area, and the corresponding abutment annular surface is used to abut the abutment portion along the axial direction of the sample roller body to lock the first rod body; when the first rod body moves in the direction toward the sample roller body, the movable cone contacts the movable wedge block and then squeezes the guide portion until the movable cone enters the locking area from the unlocking area, and then when the first rod body moves in the direction away from the sample roller body, the corresponding guide cone surface is used to squeeze the abutment portion until the movable cone and the fixed cone enter the unlocking area from the locking area together to unlock the first rod body.

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