Fabric unwinding device

Abstract

The present application provides a fabric unwinding device, which includes a bracket assembly, a yarn guiding assembly, a sample-carrying roller, and a plurality of unwinding rollers respectively arranged on the bracket assembly. The sample-carrying roller is used to support and fix the fabric sample. The yarn guiding assembly is used to bundle and separate the yarns extracted from the unwinding points of the fabric sample into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding plurality of unwinding rollers one by one. The yarn guiding 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-carrying roller based on the first tension signal. The yarn guiding assembly is further used to monitor in real time the multiple second tension signals corresponding to the multiple types of target yarns after separation, and synchronously regulate the rotation states of the corresponding plurality of unwinding rollers one by one based on the multiple second tension signals, so as to balance the unwinding progress of various types of target yarns in real time, ultimately effectively improve the unwinding efficiency of the fabric sample, and ensure the accuracy of subsequent detection data.

Description

Technical Field

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

[0002] Currently, in the fields of textile product trade and quality supervision, the accurate detection of the fiber composition of fabrics is the core link to ensure product compliance. According to current standards, fabric samples need to be unwound and disassembled into a state where the yarns are discrete, so as to achieve quantitative detection of fiber components through chemical dissolution or spectral analysis methods.

[0003] Among them, traditional unwinding devices usually adopt a combination of mechanical flattening and axial traction to gradually separate fabric samples into single yarns, and use a collection mechanism to direct the unwound yarns for storage. However, modern textile products often adopt a heterogeneous composite structure design, that is, specific functional characteristics are achieved through the combination of different materials or heterogeneous yarns. Therefore, after separating various yarns, due to the differences in the mechanical properties of different yarns, it is necessary to timely adjust the unwinding speeds of various yarns to maintain unwinding synchronization. However, traditional equipment lacks an adaptive control mechanism, forcing operators to manually adjust the rotational speed of the yarn guiding rollers to achieve dynamic balance, which not only increases labor intensity, but also easily causes problems such as yarn tension imbalance and unwinding path deviation due to lag in manual operation. In addition, with the dynamic change of the unwinding position of the fabric sample based on the unwinding progress, the stability of the unwinding path is further reduced, easily leading to yarn breakage or structural damage, affecting the accuracy of subsequent detection data. Summary of the Invention

[0004] The purpose of this application is to provide a fabric unwinding device, aiming to solve the problems that traditional equipment lacks an adaptive control mechanism, forcing operators to manually adjust the rotational speed of the yarn guiding rollers to achieve dynamic balance, which not only increases labor intensity, but also easily causes problems such as yarn tension imbalance and unwinding path deviation due to lag in manual operation. In addition, with the dynamic change of the unwinding position of the fabric sample based on the unwinding progress, the stability of the unwinding path is further reduced, easily leading to yarn breakage or structural damage, affecting the accuracy of subsequent detection data.

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

[0006] In one embodiment, 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 axially drivingly connected to the first yarn guiding unit 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 around the first yarn guiding unit, and synchronously adjust the rotation state of the sample-carrying roller based on the first tension signal. The corresponding driving displacement unit is used to synchronously drive the first yarn guiding unit to move axially parallel to the sample-carrying 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 in real time the multiple second tension signals corresponding to the multiple types of target yarns when they pass around the corresponding multiple third yarn guiding units one by one, and synchronously adjust the rotation states of the corresponding multiple unwinding rollers one by one based on the corresponding multiple second tension signals.

[0007] In one embodiment, the second yarn guiding unit is also used to monitor in real time the first optical signal corresponding to the yarn bundle when it passes around the second yarn guiding unit, and synchronously adjust the on-off states of the sample-carrying 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 disposed on the driving displacement unit, and a first yarn guiding hook body disposed on the monitoring port of the first tension sensor. The second yarn guiding unit includes a first optical sensor disposed on the bracket assembly, and a second yarn guiding hook body disposed in the monitoring area of the first optical sensor. Each third yarn guiding unit includes a second tension sensor disposed on the bracket assembly, and a third yarn guiding hook body disposed on the monitoring port of the corresponding second tension sensor. The first yarn guiding hook body is used to bundle and guide the yarn extracted from the unwinding point to the second yarn guiding hook body. The first tension sensor is used to monitor in real time the first tension signal corresponding to the yarn bundle passing around the first yarn guiding hook body, and synchronously regulate the rotation state of the sample-carrying roller based on the first tension signal. The corresponding driving displacement unit is used to drive the first tension sensor and the corresponding first yarn guiding hook body to move synchronously along the axial direction parallel to the sample-carrying roller based on the first tension signal. The second yarn guiding hook body is used to separate the yarn bundle guided by the first yarn guiding hook body into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding hook bodies one by one. The corresponding multiple third yarn guiding 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 in real time the multiple second tension signals corresponding to the multiple types of target yarns passing around the corresponding multiple third yarn guiding hook bodies one by one, and synchronously regulate 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 in real time the first optical signal corresponding to the yarn bundle passing around the second yarn guiding hook body, and synchronously regulate the on-off states of the sample-carrying 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 housing disposed 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 disposed on the support base and extends axially to the outside of the support base. The first motor is disposed inside the support base and is rotationally connected to the sample-carrying roller body. The folding bracket is disposed 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 disposed on the support housing and extends axially parallel to each other to the outside of the support housing. Each second motor is respectively disposed inside the support housing and is rotationally connected to the corresponding unwinding roller body. The axial direction of the sample-carrying roller body is perpendicular to the axial directions of the unwinding roller bodies. The driving displacement unit is disposed inside the support base and inside the support housing, and drives and connects the first tension sensor and the corresponding first yarn guiding hook body to move on the outer wall of the support housing along the axial direction parallel to the sample-carrying roller body. The first optical sensor and the corresponding second yarn guiding hook body, and the second tension sensor and the corresponding third yarn guiding hook body are respectively disposed on the outer wall of the support housing. And the first tension sensor is correspondingly controlled and connected to the first motor, the first optical sensor is correspondingly controlled and connected to the first motor and each second motor, and each second tension sensor is correspondingly controlled and connected to each second motor 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 embodiment, the folding bracket further 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 is coaxially arranged at one end of the first rod body facing the sample-carrying roller body. The fixed cone is fixedly arranged at one end of the second rod body facing away from the first rod body. The diameter of the first rod body is larger than that of the second rod body to form a limiting annular surface at the joint. The movable cone axially penetrates through the second rod body along the sample-carrying roller body and is limited between the fixed cone and the limiting annular surface. The first spring is arranged on the limiting annular surface and coaxially surrounds the outer circumference of the second rod body. The first spring elastically connects the movable cone to provide an elastic force for the movable cone in the direction away from the fixed cone along the axial direction of the sample-carrying roller body. A connecting shaft hole radially communicating with the guiding shaft hole is further arranged inside the sample-carrying roller body. The second spring is arranged at one end of the connecting shaft hole facing away from the guiding shaft hole. The second spring elastically connects the movable wedge to provide an elastic force for the movable wedge in the direction towards the guiding shaft hole along the radial direction of the sample-carrying roller body, so that the movable wedge extends into the guiding shaft hole and axially divides the guiding shaft hole into an unlocking area adjacent to the first rod body and a locking area away from the first rod body. An abutting annular surface is arranged on one side of the fixed cone facing the first rod body, a guiding conical surface is arranged on one side of the movable cone facing the first rod body, a guiding part is arranged on one side of the movable wedge facing the first rod body, and an abutting part is arranged on one side of the movable wedge facing away from the first rod body;

[0015] Wherein, when the first rod body moves in the direction towards the sample-carrying roller body, after the fixed cone contacts the movable wedge, it immediately presses the guiding part until the fixed cone enters the locking area from the unlocking area. The corresponding abutting annular surface is used to axially abut the abutting part along the sample-carrying roller body to lock the first rod body; when the first rod body moves in the direction towards the sample-carrying roller body, after the movable cone contacts the movable wedge, it immediately presses the guiding part until the movable cone enters the locking area from the unlocking area. Then, when the first rod body moves in the direction away from the sample-carrying roller body, the corresponding guiding conical surface is used to press the abutting part until the movable cone and the fixed cone enter the unlocking area from the locking area together to unlock the first rod body.

[0016] The beneficial effects of the fabric unwinding device provided by this application are as follows. Compared with the prior art, the fabric unwinding device of this application includes a support assembly, as well as a yarn guiding assembly, a sample-carrying roller, and multiple unwinding rollers respectively arranged on the support assembly. Among them, the sample-carrying roller is used to support and fix the fabric sample. The yarn guiding assembly is used to bundle and separate the yarns extracted from the fabric sample unwinding point into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple unwinding rollers one by one. The yarn guiding assembly is also used to monitor in real time the first tension signal corresponding to the yarn bundle before separation, and synchronously adjust the rotation state of the sample-carrying roller based on the first tension signal, and then perform displacement compensation on the unwinding point based on the fabric sample unwinding progress, 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 guiding 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 adjust the rotation states of the corresponding multiple unwinding rollers one by one based on the multiple second tension signals, and then balance 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 paths of some target yarns, and finally effectively improving the fabric sample unwinding efficiency and ensuring the accuracy of subsequent detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the fabric unwinding device provided by an embodiment of this application;

[0019] Figure 2 For Figure 1 Front view structural schematic diagram of the shown fabric unwinding device;

[0020] Figure 3 For Figure 1 Structural schematic diagram of the shown fabric unwinding device when the sample-carrying roller is omitted;

[0021] Figure 4 For Figure 1 Structural schematic diagram of the driving displacement unit in the shown fabric unwinding device;

[0022] Figure 5 For Figure 1 Structural schematic diagram of the first yarn guiding unit in the shown fabric unwinding device;

[0023] Figure 6 For Figure 1Schematic structural diagram of the second yarn guiding unit in the fabric unwinding device shown;

[0024] Figure 7 is Figure 1 Schematic structural diagram of the third yarn guiding unit in the fabric unwinding device shown;

[0025] Figure 8 is Figure 1 Schematic structural diagram of the sample-carrying roller in the fabric unwinding device shown;

[0026] Figure 9 is Figure 8 Partial sectional structural diagram of the unwinding roller shown;

[0027] Figure 10a is Figure 8 Partial sectional structural diagram of the unwinding roller shown where the fixed cone is in the locking area and the movable cone is in the unlocking area;

[0028] Figure 10b is Figure 8 Partial sectional structural diagram of the unwinding roller shown where the fixed cone is in the locking area and the movable cone is in the locking area;

[0029] Figure 10c is Figure 8 Partial sectional structural diagram of the unwinding roller shown where the fixed cone is in the unlocking area and the movable cone is in the unlocking area;

[0030] Figure 11 is Figure 1 Schematic structural diagram of the unwinding roller in the fabric unwinding device shown.

[0031] In the figure: 10, fabric unwinding device; 100, support assembly; 110, support base; 120, support housing; 122, avoidance slot; 130, level gauge; 140, leveling feet; 200, yarn guiding assembly; 210, driving displacement unit; 211, lead screw rotating shaft; 212, lead screw nut; 213, third motor; 220, first yarn guiding unit; 221, first tension sensor; 222, first yarn guiding hook body; 230, second yarn guiding unit; 231, first optical sensor; 232, second yarn guiding hook body; 240, third yarn guiding unit; 241, second tension sensor; 242, third yarn guiding hook body; 243, fine adjustment slide rail; 244, locking knob; 300, sample carrying roller; 310, sample carrying roller body; 311, guide shaft hole; 312, connecting shaft hole; 320, first motor; 330, folding bracket; 331, first rod; 3311, limiting ring surface; 332, arc-shaped upper shell; 333, cantilever assembly; 3331, first cantilever; 3332, second cantilever; 3333, support cantilever; 334, sample carrying curved plate; 341, second rod; 342, fixed cone; 3421, abutting ring surface; 343, movable cone; 3431, guiding cone surface; 344, first spring; 345, second spring; 346, movable wedge; 3461, guiding part; 3462, abutting part; 400, unwinding roller; 410, unwinding roller body; 420, second motor; 430, winding clip; 20, fabric sample. Detailed implementation manners

[0032] 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 will be further described in detail below with reference to 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.

[0033] 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.

[0034] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 therefore should not be construed as a limitation to the present application.

[0035] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0036] Please refer to Figure 1 and Figure 2 Now, a fabric unwinding device 10 provided in an embodiment of this application will be described. The fabric unwinding device 10 includes a support assembly 100, a yarn guiding assembly 200, a sample-carrying roller 300, and a plurality of unwinding rollers 400. Among them, the yarn guiding assembly 200, the sample-carrying roller 300, and each unwinding roller 400 are respectively arranged on the support assembly 100. The sample-carrying roller 300 is used to support and fix the fabric sample 20. The yarn guiding assembly 200 is used to bundle and separate the yarns extracted from the unwinding point of the fabric sample 20 into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple unwinding rollers 400 one by one. The yarn guiding 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-carrying roller 300 based on the first tension signal, and then perform displacement compensation on the unwinding point based on the unwinding progress of the fabric sample 20, so that the unwinding point can move within a preset path range. The yarn guiding assembly 200 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 regulate the rotation states of the corresponding multiple unwinding rollers 400 one by one based on the multiple second tension signals, and then balance the unwinding progress of each type of target yarn in real time.

[0037] 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 guiding assembly 200 is used to synchronously regulate the rotation state of the sample-carrying roller 300 based on the first tension signal. The rotation state of the sample-carrying roller 300 specifically includes the rotation speed and the rotation direction of the sample-carrying roller 300. The yarn guiding assembly 200 is used to synchronously regulate the rotation states of the corresponding multiple unwinding rollers 400 based on the second tension signal. 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 properties such as tensile strength, elastic modulus, and stress relaxation. Generally speaking, the mechanical properties of target yarns with the same material and consistent weaving parameters are correspondingly consistent.

[0038] The beneficial effects of the fabric unwinding device 10 provided by this application are as follows. Compared with the prior art, the fabric unwinding device 10 of this application monitors the first tension signal corresponding to the yarn bunching before separation in real time, and synchronously regulates the rotation state of the sample-carrying roller 300 based on the first tension signal. Furthermore, displacement compensation is performed on 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 paths of various target yarns. And by monitoring in real time a plurality of second tension signals corresponding one by one to various target yarns after separation, and synchronously regulating the rotation states of the corresponding plurality of unwinding rollers 400 based on the plurality of second tension signals one by one, the unwinding progress of various target yarns is balanced in real time, avoiding problems such as uneven tension of some target yarns and deviation of the unwinding paths of some target yarns. Finally, the unwinding efficiency of the fabric sample 20 is effectively improved, and the accuracy of subsequent detection data is ensured.

[0039] Please refer to Figure 1 and Figure 2 , in this embodiment, the above-mentioned bracket assembly 100 includes a support base 110 and a support housing 120. Among them, the support housing 120 is fixedly arranged on the support base 110 and covers a part of the surface of the top of the support base 110. The yarn guiding assembly 200 is respectively arranged on the support base 110 and the support housing 120. The sample-carrying roller 300 is rotatably connected to the support base 110, and each unwinding roller 400 is respectively rotatably connected to the support housing 120. A spirit level 130 is further provided on the top of the support base 110, and a plurality of leveling feet 140 are further provided at the bottom of the support base 110, and are further cooperatively used to adjust the support base 110 to a horizontal state.

[0040] Please refer to together Figure 3 and Figure 4, in this embodiment, the above-mentioned yarn guiding assembly 200 includes a driving displacement unit 210, a first yarn guiding unit 220, a second yarn guiding unit 230 and a plurality of third yarn guiding units 240. Among them, the driving displacement unit 210 is respectively arranged on the support base 110 and the support housing 120, and the first yarn guiding unit 220, the second yarn guiding unit 230 and the plurality of third yarn guiding units 240 are respectively arranged on the support housing 120. The driving displacement unit 210 is axially drivingly connected to the first yarn guiding unit 220 parallel to the loading roller 300. The first yarn guiding unit 220 is used to bundle and guide the yarn extracted from the unwinding point to the second yarn guiding unit 230. The first yarn guiding unit 220 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 220, and synchronously adjust the rotation state of the loading roller 300 based on the change trend of the first tension signal. Accordingly, the driving displacement unit 210 is used to synchronously drive the first yarn guiding unit 220 to move axially parallel to the loading roller 300 based on the change trend of the first tension signal, and further synchronously drive the first yarn guiding unit 220 to move axially parallel to the loading 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 guiding unit 220 axially parallel to the loading roller 300 is maintained within a preset range, thereby ensuring that the first yarn guiding unit 220 can continuously monitor a relatively stable first tension signal. The second yarn guiding unit 230 is used to separate the yarn bundle guided by the first yarn guiding unit 220 into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding units 240 one by one. The corresponding multiple third yarn guiding units 240 are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers 400 one by one. The corresponding multiple third yarn guiding units 240 are also used to monitor in real time the multiple second tension signals corresponding to the multiple types of target yarns when they pass through the corresponding multiple third yarn guiding units 240 one by one, and synchronously adjust the rotation states of the corresponding multiple unwinding rollers 400 one by one based on the change trends of the corresponding multiple second tension signals.

[0041] It should be noted that, in this embodiment, when the yarn bundle guided by the above-mentioned first yarn guiding unit 220 passes through the second yarn guiding unit 230, the yarn bundle can be manually separated into multiple types of target yarns, and then the second yarn guiding unit 230 is used to guide the multiple types of target yarns to the corresponding multiple third yarn guiding units 240 one by one.

[0042] It should be noted that, in this embodiment, the above-mentioned second yarn guiding unit 230 is fixedly arranged on the support housing 120, so that the multiple guiding paths of the multiple types of target yarns from the second yarn guiding unit 230 to the corresponding multiple third yarn guiding units 240 are all stable, which is convenient for the multiple third yarn guiding units 240 to monitor relatively stable multiple second tension signals in real time.

[0043] Further, in this embodiment, the second yarn guiding unit 230 is further configured to monitor in real time the first optical signal corresponding to the yarn bundle when it is wound around the second yarn guiding unit 230, and synchronously regulate the on-off states of the sample-carrying roller 300 and the corresponding plurality of unwinding rollers 400 based on the change of the first optical signal. When a specific yarn (such as a jacquard yarn) that is relatively short and 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 guiding unit 230 can immediately stop the sample-carrying roller 300 and the corresponding plurality of unwinding rollers 400. When the first optical signal resumes the preset value after the specific yarn is removed, the second yarn guiding unit 230 can immediately start the sample-carrying roller 300 and the corresponding plurality of unwinding rollers 400. Specifically, when the first optical signal resumes the preset value after the specific yarn is removed, the second yarn guiding unit 230 immediately restarts the sample-carrying roller 300 and the corresponding plurality of unwinding rollers 400, and gradually restores the sample-carrying roller 300 and the corresponding plurality of unwinding rollers 400 to the operating state before they stopped.

[0044] Please refer to Figure 5 , Figure 6 and Figure 7, in 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 disposed on the driving displacement unit 210, and the first yarn guiding hook body 222 is disposed 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 disposed on the support housing 120, and the second yarn guiding hook body 232 is disposed in the monitoring area of the first optical sensor 231. Each third yarn guiding unit 240 includes a second tension sensor 241 and a third yarn guiding hook body 242. Each second tension sensor 241 is movably disposed on the support housing 120, and each third yarn guiding hook body 242 is disposed on the monitoring port of the corresponding second tension sensor 241. Among them, the first yarn guiding hook body 222 is used to bundle and guide the yarn extracted from the unwinding point to the second yarn guiding hook body 232. The first tension sensor 221 is used to monitor in real time the first tension signal corresponding to the yarn bundle passing through the first yarn guiding hook body 222, and synchronously control the rotation state of the sample-carrying roller 300 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 guiding 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. The second yarn guiding hook body 232 is used to separate the yarn bundle guided by the first yarn guiding hook body 222 into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding hook bodies 242 one by one. The corresponding multiple third yarn guiding hook bodies 242 are used to guide the corresponding multiple types of target yarns to the corresponding multiple unwinding rollers 400 one by one. 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 passing through the corresponding multiple third yarn guiding hook bodies 242 one by one, and synchronously control the rotation states of the corresponding multiple unwinding rollers 400 one by one based on the change trends of the corresponding multiple second tension signals. The first optical sensor 231 is used to monitor in real time the first optical signal corresponding to the yarn bundle passing through the second yarn guiding hook body 232, and synchronously control the on / off states of the sample-carrying roller 300 and the corresponding multiple unwinding rollers 400 based on the change of the first optical signal.

[0045] It should be noted that in this embodiment, during the unwinding process of the fabric sample 20, along with the dynamic change of the unwinding point position, some target yarns may deviate slightly from the corresponding third yarn guiding hook body 242 in some cases, resulting in the loss of contact between the corresponding target yarns and the corresponding third yarn guiding hook body 242. As a result, the corresponding third yarn guiding hook body 242 cannot provide a guiding effect on the corresponding target yarns, and the corresponding second tension sensor 241 cannot monitor the corresponding second tension signal when the corresponding target yarns wind around the corresponding third yarn guiding hook body 242. By movably arranging the second tension sensors 241 on the support housing 120 respectively, when facing the above situation, the positions of the corresponding second tension sensors 241 can be slightly adjusted within a predetermined range, so that the corresponding third yarn guiding hook body 242 and the corresponding target yarns can maintain contact again.

[0046] Specifically, in this embodiment, each of the above-mentioned third yarn guiding 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 guiding unit 240 are arranged in parallel and are respectively disposed on the outer wall of the support housing 120. Each second tension sensor 241 is slidably connected to each fine-tuning slide rail 243 in a one-to-one correspondence. Each locking knob 244 is respectively inserted through each second tension sensor 241 and is used to rotate and abut against the corresponding fine-tuning slide rail 243 to lock the corresponding second tension sensor 241, or to rotate and separate from the corresponding fine-tuning slide rail 243 to unlock the corresponding second tension sensor 241.

[0047] Please refer to Figure 8 and Figure 11, in this embodiment, the above-mentioned sample loading roller 300 includes a sample loading roller body 310 and a first motor 320. The sample loading roller body 310 is arranged on the support base 110 and extends along its own axial direction (the axial direction of the sample loading roller body 310 is the axial direction of the sample loading roller 300) to the outside of the support base 110. The first motor 320 is arranged inside the support base 110 and is rotationally connected to the sample loading 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 penetrated and arranged on the support housing 120 and extends parallel to each other along its own axial direction (the axial direction of the unwinding roller body 410 is the axial direction of the unwinding roller 400) to the outside of the support housing 120. A winding clip 430 for elastically clamping and fixing the end of the corresponding target yarn is arranged on each unwinding roller body 410. Each second motor 420 is respectively arranged inside the support housing 120 and is rotationally connected to the corresponding unwinding roller body 410. The axial direction of the sample loading roller body 310 is perpendicular to the axial direction of each unwinding roller body 410. The driving displacement unit 210 is arranged inside the support base 110 and inside the support housing 120, and drives and connects the first tension sensor 221 and the corresponding first yarn guiding hook body 222 on the outer wall of the support housing 120 along the axial direction parallel to the sample loading roller body 310. The first optical sensor 231 and the corresponding second yarn guiding hook body 232, and the second tension sensor 241 and the corresponding third yarn guiding hook body 242 are respectively arranged on the outer wall of the support housing 120. And the first tension sensor 221 is remotely controlled and connected to the first motor 320, and further synchronously regulates the rotation direction and rotation speed of the first motor 320 based on the change 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, and further synchronously regulates the on-off states of the first motor 320 and each second motor 420 based on the change of the first optical signal. Each second tension sensor 241 is remotely controlled and connected to each second motor 420 one by one, and further synchronously regulates the rotation speeds of the multiple second motors 420 one by one based on the change trends of the corresponding multiple second tension signals.

[0048] Further, in this embodiment, the above-mentioned sample loading roller 300 further includes a sample loading base (not marked in the figure). The sample loading base is fixedly arranged on the support base 110. The first motor 320 is fixedly arranged on the sample loading base and is located inside the support base 110. The sample loading roller body 310 is penetrated through the sample loading base and extends out of the support base 110 along its own axial direction via the sample loading base. The sample loading base is suitable for further providing a fixing and encapsulating effect for the sample loading roller body 310 and the first motor 320.

[0049] Further, in this embodiment, a plurality of support columns (not shown in the figure) are provided on the top of the support base 110. The plurality of support columns are arranged adjacent to each other at intervals inside the support housing 120. The top of each support column is fixedly connected to each of the second motors 420 in a one-to-one correspondence. Each support column is adapted to raise the corresponding second motor 420, so that each unwinding roller body 410 rotatably connected to each second motor 420 is in an appropriate position area.

[0050] Please refer to Figure 3 and Figure 4 In this embodiment, the support housing 120 is provided with an avoidance slot hole 122 extending along the axial direction of the sample-carrying roller body 310. The driving displacement unit 210 includes a lead screw rotating shaft 211, a lead screw nut 212 and a third motor 213. The lead screw rotating shaft 211 is rotatably arranged on the support base 110 through a lead screw bearing and extends into the support housing 120 along its own axial direction. The lead screw nut 212 is sleeved on the lead screw rotating shaft 211, so that the lead screw rotating shaft 211 drives and connects the lead screw nut 212 along the axial direction parallel to the sample-carrying roller body 310. The lead screw nut 212 passes through the avoidance slot hole 122 and is connected to the first tension sensor 221 and the corresponding first yarn guide hook body 222 on the outer wall of the support housing 120. The third motor 213 is arranged inside the support base 110 and is drivingly connected to the lead screw rotating shaft 211. The first tension sensor 221 is remotely controlled and connected to the third motor 213, and further synchronously regulates the rotation direction and rotation speed of the third motor 213 based on the change trend of the first tension signal.

[0051] Further, in some other embodiments, the driving displacement unit 210 includes a linear driving guide rail. The linear driving guide rail is arranged inside the support housing 120 along the axial direction parallel to the sample-carrying roller body 310, and the sliding structure in the linear driving guide rail passes through the avoidance slot hole 122 and is connected to the first tension sensor 221 and the corresponding first yarn guide hook body 222 on the outer wall of the support housing 120.

[0052] Further, in this embodiment, the sample-carrying roller 300 further includes a folding bracket 330. The folding bracket 330 is arranged on the sample-carrying roller body 310 to support and unfold the fabric sample 20. Especially for tubular fabric samples 20 (such as socks, 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.

[0053] Please refer to Figure 9, in this embodiment, the folding bracket 330 includes a first rod 331, an arc-shaped upper shell 332, a plurality of cantilever assemblies 333 and a plurality of sample-carrying curved plates 334. Further, a guide shaft hole 311 is coaxially provided at one end of the roller body facing away from the first motor 320. The first rod 331 is axially movably inserted into 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 331 facing away from the sample-carrying roller body 310. The plurality of cantilever assemblies 333 are respectively hinged on the sample-carrying roller body 310 and are evenly arranged along the circumferential direction of the sample-carrying roller body 310. The plurality of sample-carrying curved plates 334 are fixedly arranged on the plurality of cantilever assemblies 333 one by one and are evenly arranged along the circumferential direction of the sample-carrying roller body 310. One end of each sample-carrying curved plate 334 facing the arc-shaped upper shell 332 is respectively hinged on the arc-shaped upper shell 332. The arc-shaped upper shell 332 and the corresponding plurality of sample-carrying curved plates 334 cooperate to form an umbrella-like structure. And when the first rod 331 moves in the direction away from the sample-carrying roller body 310, the arc-shaped upper shell 332 synchronously drives the respective cantilever assemblies 333 and the corresponding sample-carrying curved plates 334 to close accordingly, so as to be suitable for sleeving and fixing the fabric sample 20. When the first rod 331 moves in the direction towards the sample-carrying roller body 310, the arc-shaped upper shell 332 synchronously drives the respective cantilever assemblies 333 and the corresponding sample-carrying curved plates 334 to unfold accordingly, so as to be suitable for supporting and unfolding the fabric sample 20.

[0054] Specifically, in this embodiment, each of the cantilever assemblies 333 includes a first cantilever 3331, a second cantilever 3332 and a support cantilever 3333. Among them, one end of each first cantilever 3331 is hinged on the sample-carrying roller body 310, and the other end is hinged on one end of the corresponding support cantilever 3333. One end of each second cantilever 3332 is hinged on the sample-carrying roller body 310, and the other end is hinged on the opposite end of the corresponding support cantilever 3333. When the first rod 331 moves in the direction away from the sample-carrying roller body 310, each first cantilever 3331 and each second cantilever 3332 are relatively closed with the corresponding support cantilever 3333. When the first rod 331 moves in the direction towards the sample-carrying roller body 310, each first cantilever 3331 and each second cantilever 3332 are relatively unfolded with the corresponding support cantilever 3333.

[0055] Please refer to Figure 10a , Figure 10b and Figure 10c, in this embodiment, the folding bracket 330 further includes a second rod body 341, a fixed cone 342, a movable cone 343, a first spring 344, a second spring 345, and a movable wedge 346. Among them, the second rod body 341 is coaxially disposed at one end of the first rod body 331 facing the sample-carrying roller body 310. The fixed cone 342 is fixedly disposed at one end of the second rod body 341 facing away from the first rod body 331. The diameter of the first rod body 331 is greater than that of the second rod body 341, so that a limiting annular surface 3311 facing away from the first rod body 331 (correspondingly facing the second rod body 341) is formed at the junction of the first rod body 331 and the second rod body 341. The movable cone 343 axially penetrates through the second rod body 341 along the sample-carrying roller body 310 and is limited between the fixed cone 342 and the limiting annular surface 3311. The first spring 344 is disposed on the limiting annular surface 3311 and coaxially surrounds the outer periphery of the second rod body 341. The first spring 344 elastically connects the movable cone 343 to provide an elastic force in the direction away from the fixed cone 342 along the axial direction of the sample-carrying roller body 310 for the movable cone 343. Thus, in the natural state (such as when the sample-carrying roller body 310 is vertically arranged), the movable cone 343 can be axially spaced relative to the fixed cone 342. A connecting shaft hole 312 radially communicating with the guiding shaft hole 311 is further provided inside the sample-carrying roller body 310. The second spring 345 is disposed at one end of the connecting shaft hole 312 facing away from the guiding shaft hole 311. The second spring 345 elastically connects the movable wedge 346 to provide an elastic force in the direction towards the guiding shaft hole 311 along the radial direction of the sample-carrying roller body 310 for the movable wedge 346, so that the movable wedge 346 extends into the guiding shaft hole 311 and axially divides the guiding shaft hole 311 into an unlocking area adjacent to the first rod body 331 and a locking area away from the first rod body 331. Among them, the area from the shaft hole opening of the guiding shaft hole 311 to the movable wedge 346 is the unlocking area, and the area from the movable wedge 346 to the bottom of the shaft hole is the locking area. An abutting annular surface 3421 is provided on one side of the fixed cone 342 facing the first rod body 331. A guiding conical surface 3431 is provided on one side of the movable cone 343 facing the first rod body 331. A guiding portion 3461 is provided on one side of the movable wedge 346 facing the first rod body 331. An abutting portion 3462 is provided on one side of the movable wedge 346 facing away from the first rod body 331.

[0056] Furthermore, when the first rod body 331 moves in the direction towards the sample-carrying roller body 310, after the fixed cone 342 contacts the movable wedge 346, it immediately squeezes the guiding 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 Figure 10aAs shown), the corresponding abutting toroidal surface 3421 is used to axially abut against the abutting portion 3462 of the limiting movable wedge block 346 along the sample-carrying roller body 310 to lock the first rod body 331, so that each first cantilever 3331 and each second cantilever 3332 are kept in the unfolded state with the corresponding support cantilevers 3333. On this basis, when the first rod body 331 continues to move in the direction towards the sample-carrying roller body 310, the movable cone 343 contacts the movable wedge block 346 and then squeezes the guiding portion 3461 of the movable wedge block 346 until the movable cone 343 enters the locking area from the unlocking area (as Figure 10b shown), and then when the first rod body 331 moves in the direction away from the sample-carrying roller body 310, the corresponding guiding conical surface 3431 is used to squeeze the abutting portion 3462 of the movable wedge block 346 until the movable cone 343 and the fixed cone 342 enter the unlocking area from the locking area together (as Figure 10c shown) to unlock the first rod body 331, so that each first cantilever 3331 and each second cantilever 3332 are kept in the folded state with the corresponding support cantilevers 3333.

[0057] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fabric unwinding device, characterized in that, It includes a bracket assembly, as well as a yarn guiding assembly, a sample-carrying roller, and multiple unwinding rollers respectively arranged on the bracket assembly. The sample-carrying roller is used to support and fix the fabric sample. The yarn guiding assembly includes a driving displacement unit, a first yarn guiding unit, a second yarn guiding unit, and multiple third yarn guiding units respectively arranged on the bracket assembly. 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 monitoring port of the corresponding second tension sensor. The first yarn guiding hook body is used to bundle and guide the yarn extracted from the unwinding point of the fabric sample to the second yarn guiding hook body. The first tension sensor is used to monitor in real time the first tension signal corresponding to the yarn bundle when it passes around the first yarn guiding hook body, and synchronously regulate the rotation state of the sample-carrying roller based on the first tension signal. The corresponding driving displacement unit is used to synchronously drive the first tension sensor and the corresponding first yarn guiding hook body to move along the axial direction parallel to the sample-carrying roller based on the first tension signal. The second yarn guiding hook body is used to separate the yarn bundle guided by the first yarn guiding hook body into multiple types of target yarns, and guide the multiple types of target yarns to the corresponding multiple third yarn guiding hook bodies one by one. The corresponding multiple third yarn guiding 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 in real time the multiple second tension signals corresponding to the multiple types of target yarns when they pass around the corresponding multiple third yarn guiding hook bodies one by one, and synchronously regulate the rotation states of the corresponding multiple unwinding rollers one by one based on the corresponding multiple second tension signals. The first optical sensor is used to monitor in real time the first optical signal corresponding to the yarn bundle when it passes around the second yarn guiding hook body, and synchronously regulate the on-off states of the sample-carrying roller and the corresponding multiple unwinding rollers based on the first optical signal.

2. The fabric unwinding device according to claim 1, 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.

3. The fabric unwinding device according to claim 2, 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.

4. The fabric unwinding device according to claim 3, 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.

5. The fabric unwinding device according to claim 4, 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. A guiding shaft hole is coaxially provided at one end of the sample-carrying roller body facing away from the first motor. The first rod body is movably inserted into the guiding 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 to the sample-carrying roller body and are evenly arranged along the circumferential direction of the sample-carrying roller body. The plurality of sample-carrying curved plates are fixedly arranged on the plurality of cantilever assemblies respectively and are evenly arranged along the circumferential direction of the sample-carrying roller body. One end of each sample-carrying curved plate facing the arc-shaped upper shell is respectively hinged to the arc-shaped upper shell. When the first rod body moves in the direction towards the sample-carrying roller body, the arc-shaped upper shell synchronously drives each cantilever assembly and the corresponding sample-carrying curved plates to unfold accordingly. When the first rod body moves in the direction away from the sample-carrying roller body, the arc-shaped upper shell synchronously drives each cantilever assembly and the corresponding sample-carrying curved plates to fold up accordingly.

6. The fabric unwinding device according to claim 5, characterized in that, Each cantilever assembly includes a first cantilever, a second cantilever, and a support cantilever. One end of each first cantilever is hinged to the sample-carrying roller body, and the other end is hinged to the corresponding support cantilever. One end of each second cantilever is hinged to the sample-carrying roller body, and the other end is hinged to the corresponding support cantilever. When the first rod body moves in the direction towards the sample-carrying roller body, each first cantilever and each second cantilever are relatively unfolded with the corresponding support cantilevers. When the first rod body moves in the direction away from the sample-carrying roller body, each first cantilever and each second cantilever are relatively folded up with the corresponding support cantilevers.

7. The fabric unwinding device according to claim 6, characterized in that, The folding bracket further 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 is coaxially arranged at one end of the first rod body facing the sample-carrying roller body. The fixed cone is fixedly arranged at one end of the second rod body facing away from the first rod body. The diameter of the first rod body is larger than that of the second rod body to form a limiting annular surface at the joint. The movable cone axially moves through the second rod body along the sample-carrying roller body and is limited between the fixed cone and the limiting annular surface. The first spring is arranged on the limiting annular surface and coaxially surrounds the outer periphery of the second rod body. The first spring elastically connects the movable cone to provide an elastic force for the movable cone along the axial direction of the sample-carrying roller body and away from the fixed cone. A connecting shaft hole radially communicating with the guiding shaft hole is further arranged inside the sample-carrying roller body. The second spring is arranged at one end of the connecting shaft hole facing away from the guiding shaft hole. The second spring elastically connects the movable wedge to provide an elastic force for the movable wedge along the radial direction of the sample-carrying roller body towards the guiding shaft hole, so that the movable wedge extends into the guiding shaft hole and axially divides the guiding shaft hole into an unlocking area adjacent to the first rod body and a locking area away from the first rod body. An abutting annular surface is arranged on one side of the fixed cone facing the first rod body. A guiding conical surface is arranged on one side of the movable cone facing the first rod body. A guiding part is arranged on one side of the movable wedge facing the first rod body. An abutting part is arranged on one side of the movable wedge facing away from the first rod body. Wherein, when the first rod body moves towards the sample-carrying roller body, the fixed cone contacts the movable wedge and then squeezes the guiding part until the fixed cone enters the locking area from the unlocking area. Correspondingly, the abutting annular surface is used to axially abut the abutting part along the sample-carrying roller body to lock the first rod body. When the first rod body moves towards the sample-carrying roller body, the movable cone contacts the movable wedge and then squeezes the guiding part until the movable cone enters the locking area from the unlocking area. Subsequently, when the first rod body moves away from the sample-carrying roller body, the guiding conical surface is used to squeeze the abutting part 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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