Safety protection device based on fabric tension detection, weft straightener and dyeing and finishing unit

Abstract

The utility model relates to the field of textile dyeing and finishing, in particular to a safety protection device based on fabric tension detection, a weft straightener and a dyeing and finishing unit. The safety protection device based on fabric tension detection comprises a detection device, a cloth breaking mechanism, a controller and at least one cloth containing mechanism, wherein the detection device is used for detecting a signal value corresponding to fabric tension change; the cloth breaking mechanism is used for cutting or puncturing the fabric when being triggered; the controller is respectively connected with the detection device and the cloth breaking mechanism and is used for triggering the cloth breaking mechanism when a received signal value exceeds a preset value; the cloth containing mechanism is arranged on the running path of the fabric and used for containing cloth. According to the utility model, the fabric can be broken in time in emergency, so that the roller body is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the field of textile dyeing and finishing, in particular to a safety protection device based on fabric tension detection, a weft straightening machine and a dyeing and finishing unit. Background Art

[0002] In the field of textile dyeing and finishing technology, padding, weft straightening and setting are comprehensive process technologies often applied in the fabric processing process. After the fabric is padded with process liquid by a padding mangle, the weft yarn deformation of the fabric is corrected by a weft straightening machine, and then the appearance and internal quality of the fabric are improved by heat setting through a stenter, the wearing performance of the fabric is improved, and the fabric is given special uses, making the fabric more perfect and value-added.

[0003] During the synchronous operation of the padding mangle, the weft straightening machine and the stenter, there is a problem that cannot be ignored, that is, there are many abnormal states that are extremely likely to cause the fabric to wind around the rollers of the padding mangle. For example, the fabric absorbs too much moisture before entering the padding mangle, causing the fabric to slip between the rollers, thus winding the fabric around the rollers; uneven tension of the fabric in the padding mangle causes the fabric to shift between the rollers, thus winding the fabric around the rollers; when the operator operates the padding mangle, the speed is too fast or too slow and the position of the fabric is not properly adjusted, thus winding the fabric around the rollers; the surface of the rollers is uneven, worn or has dirt, thus winding the fabric around the rollers, and many other factors directly cause the running direction of the fabric between the padding mangle and the weft straightening machine to be completely opposite to the running direction of the fabric between the weft straightening machine and the stenter, resulting in a sharp increase in the fabric tension from the fabric outlet node of the padding mangle to the fabric feeding node of the stenter, causing the guide rollers and the heads of the straightening rollers of the weft straightening machine to bear unstable alternating stresses and the load on the roller body to suddenly increase sharply, and the roller body is extremely easy to bend and break.

[0004] And the bending and breaking of the above-mentioned roller body bring risks and many losses to the entire production process:

[0005] (1) Safety risk: The bending and breaking of the rollers of the weft straightening machine will induce the flying or bouncing of some objects, directly injuring the operators of the weft straightening machine, which poses a great threat to the personal safety of the workers.

[0006] (2) Equipment damage: The guide rollers and the straightening rollers of the weft straightening machine are deformed or broken due to excessive tension, and the motor and other related components of the transmission system of the weft straightening machine are damaged due to overload, and it is necessary to spend manpower, material resources and financial resources to repair or replace the damaged equipment components such as the guide rollers.

[0007] (3) Production line interruption: After the equipment is damaged, it is necessary to clean the entangled fabric and repair the damaged components, which causes the production line to stop temporarily and reduces production efficiency. When repairing and replacing damaged equipment, it may cause the production line to stagnate for a long time, affecting the delivery time and production plan, making subsequent processes such as finishing and packaging unable to proceed normally, and further disrupting the entire production process.

[0008] (4) Unstable quality: Even after the equipment is repaired and production resumes, it may potentially affect the quality of subsequent products due to this failure, such as the flatness and color uniformity of the fabric.

[0009] Currently, for the problem that the running direction of the fabric between the padding mangle and the straightening machine is exactly opposite to that between the straightening machine and the stenter, resulting in a sharp increase in the fabric tension from the padding mangle fabric output node to the stenter fabric feeding node, the solution is to urgently press the emergency stop button after detecting that the rollers of the padding mangle are entangled with the fabric. However, after the rollers are entangled with the fabric, the operator may not be able to detect it in time, resulting in untimely stopping, and problems such as bending or even breaking of the straightening machine roller body may occur during the production process.

[0010] In order to solve the problem of untimely stopping, the inventor of the present application configures a tension sensor on the fabric running path. After the tension sensor detects a sharp increase in tension, it automatically triggers a stop. However, the inventor found that in the actual production process, the driving motor power and running speed of the padding mangle and the stenter are relatively large, and the inertia is also relatively large. After the tension sensor triggers a stop, the padding mangle and the stenter cannot stop immediately, and the situation where the straightening machine roller body bends or even breaks due to the fabric being taut still occurs.

[0011] Therefore, in view of the problems existing in the prior art, there is an urgent need to provide a solution. Summary of the Invention

[0012] The technical problem to be solved by the present utility model is to overcome the defects of the prior art and provide a safety protection device based on fabric tension detection, which can cause the fabric to break in time in case of an emergency, thereby avoiding damage to the roller body.

[0013] To solve the above technical problem, the technical solution of the present utility model is: A safety protection device based on fabric tension detection, comprising:

[0014] A detection device for detecting a signal value corresponding to the change in the fabric tension;

[0015] A rag-breaking mechanism for cutting or piercing the fabric when triggered;

[0016] A controller, respectively connected to the detection device and the rag-breaking mechanism, for triggering the rag-breaking mechanism when the signal value received by it exceeds a preset value;

[0017] At least one fabric storage mechanism, disposed on the running path of the fabric for storing the fabric.

[0018] A specific type of detection device is further provided. The detection device is a displacement sensor for detecting the displacement amount of the fabric storage roller of the fabric storage mechanism caused by the change in the fabric tension.

[0019] Another specific type of detection device is further provided. The detection device is a tension sensor for detecting the fabric tension.

[0020] Furthermore, the tension sensor is a tension roller which is rotatably supported on a frame, and the fabric bypasses the tension roller.

[0021] A specific structure of the fabric storage mechanism is further provided. The fabric storage mechanism includes a fabric storage roller assembly. The fabric storage roller assembly includes a roller seat and a fabric storage roller. The roller seat is configured to move in the direction of storing and releasing the fabric. The fabric storage roller is rotatably supported on the roller seat and presses the fabric against its roller surface.

[0022] Another specific structure of the fabric storage mechanism is further provided. The fabric storage mechanism includes:

[0023] A fabric storage roller assembly, including a roller seat and a fabric storage roller. The roller seat is configured to move in the direction of storing and releasing the fabric. The fabric storage roller is rotatably supported on the roller seat, and the fabric bypasses the fabric storage roller;

[0024] An elastic force applying assembly. The elastic force applying assembly acts on the roller seat. When the fabric is tensioned, the fabric storage roller assembly overcomes the resistance applied by the elastic force applying assembly to cause displacement.

[0025] A specific structure of the elastic force applying assembly is further provided. The elastic force applying assembly includes:

[0026] A support rod, one end of which is connected to the roller seat, and the other end of which is movably inserted into the frame;

[0027] A spring, sleeved on the support rod, with one end abutted against a step on the support rod and the other end abutted against the frame.

[0028] A specific structure of a fabric cutting mechanism is further provided. The fabric cutting mechanism includes a fabric cutting assembly and a moving driving mechanism. The moving driving mechanism is connected to the fabric cutting assembly for driving the fabric cutting assembly to move towards the fabric to cut or pierce the fabric.

[0029] Further, in order to improve the reliability of emergency cut-off, at least one of the rag mechanisms is provided on one side in the fabric width direction; or at least one of the rag mechanisms is provided on each of the two sides in the fabric width direction.

[0030] The present utility model also provides a weft straightener, which includes a safety protection device based on fabric tension detection.

[0031] The present utility model also provides a dyeing and finishing unit, which includes a safety protection device based on fabric tension detection or a weft straightener.

[0032] After adopting the above technical solution, when the running direction of the fabric between the padder and the weft straightener is opposite to the running direction of the fabric between the weft straightener and the stenter due to the fabric being wound around the roller of the padder, the fabric is tensioned. When the signal corresponding to the fabric tension change detected by the detection device increases to reach a preset value, the rag mechanism is triggered to act. After the rag mechanism cuts or pierces the fabric, stress is likely to concentrate at the cut of the fabric. The strong fabric tension causes the fabric to be torn in the full width direction from the cut, unloading the fabric tension. The cloth storage is provided to avoid damage to the rollers of the weft straightener and even the dyeing and finishing unit caused by the fabric tension during the process of cutting or piercing the fabric. Therefore, when the fabric runs abnormally due to being wound around the roller of the padder, the present utility model can automatically, timely and reliably form a cut on the fabric, enabling the fabric to be torn and instantaneously releasing the soared tension, thereby avoiding bending and breaking of the rollers of the weft straightener, eliminating potential safety hazards to personnel and equipment production caused by excessive fabric tension, and avoiding the expansion of problems. This helps to reduce the risk of equipment damage, lower the maintenance cost, improve the overall reliability of the production line, greatly avoid and reduce direct equipment losses, production interruption losses, product quality losses and time cost losses, helps to improve the overall working efficiency of the production line, and enhance the competitiveness of the enterprise. Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the first safety protection device based on fabric tension detection of the present utility model;

[0034] Figure 2 It is a schematic structural diagram of the second safety protection device based on fabric tension detection of the present utility model;

[0035] Figure 3 It is a schematic structural diagram of the third safety protection device based on fabric tension detection of the present utility model;

[0036] Figure 4 It is a schematic structural diagram of the fourth safety protection device based on fabric tension detection of the present utility model;

[0037] Figure 5Schematic diagram of the fifth safety protection device based on fabric tension detection of the present utility model;

[0038] Figure 6 Schematic diagram of the sixth safety protection device based on fabric tension detection of the present utility model;

[0039] Figure 7 Schematic diagram of the seventh safety protection device based on fabric tension detection of the present utility model;

[0040] Figure 8 Schematic diagram of the eighth safety protection device based on fabric tension detection of the present utility model;

[0041] Figure 9 Schematic diagram of the present utility model when the rag mechanism of the safety protection device based on fabric tension detection is located above the fabric and there is a rag mechanism on one side of the fabric;

[0042] Figure 10 Schematic diagram of the present utility model when the rag mechanism of the safety protection device based on fabric tension detection is located above the fabric and there are rag mechanisms on both sides of the fabric;

[0043] Figure 11 Schematic diagram of the present utility model when the rag mechanism of the safety protection device based on fabric tension detection is located below the fabric and there are rag mechanisms on both sides of the fabric;

[0044] Figure 12 Schematic diagram of the dyeing and finishing unit of the present utility model;

[0045] In the figure, 1. calender; 2. warp straightener; 3. stenter; 4. detection device; 4a. displacement sensor; 4b. tension roller; 5. rag mechanism; 51. rag assembly; 52. moving drive mechanism; 6. fabric; 7. cloth storage mechanism; 71. cloth storage roller assembly; 72. elastic force application component; 72a. gas spring; 721b. support rod; 722b. spring; 72c. tension spring; 8. frame; 81. linear guide rail; 9. fabric guide roller. Detailed implementation manners

[0046] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0047] Embodiment 1

[0048] As Figures 1 to 11 shown, a safety protection device based on fabric tension detection includes:

[0049] A detection device 4 for detecting a signal value corresponding to the change in the tension of the fabric 6;

[0050] A rag mechanism 5 for cutting or piercing a fabric 6 when triggered;

[0051] A controller, respectively connected to the detection device 4 and the rag mechanism 5, for triggering the rag mechanism 5 when the signal value it receives exceeds a preset value;

[0052] At least one fabric storage mechanism 7, arranged on the running path of the fabric 6 for storing the fabric.

[0053] It should be noted that the fabric storage mechanism 7 can be configured to have remaining fabric storage capacity before the rag mechanism 5 cuts or pierces the fabric 6. It can also be configured to have no remaining fabric storage capacity before the rag mechanism 5 cuts or pierces the fabric 6, but to enable the deformation amount of the fabric 6 to support until the rag mechanism 5 cuts or pierces the fabric 6.

[0054] Specifically, the dyeing and finishing unit further includes a calender 1, a weft straightener 2, and a stenter 3 arranged in sequence along the running path of the fabric 6. The device in this embodiment is arranged on the fabric running path between the calender 1 and the stenter 3. When the fabric 6 is wound around the calender roll of the calender 1, resulting in the fabric running direction between the calender 1 and the weft straightener 2 being opposite to the fabric running direction between the weft straightener 2 and the stenter 3, the fabric 6 is tensioned. When the signal value corresponding to the fabric 6 tension detected by the detection device 4 increases to reach the preset value, the rag mechanism 5 is triggered to act. After the rag mechanism 5 cuts or pierces the fabric, stress is likely to concentrate at the cut of the fabric 6. The strong fabric 6 tension causes the fabric 6 to be torn from the cut in the full width, unloading the fabric tension. Setting the fabric storage can avoid the damage of the fabric 6 tension to the rolls of the weft straightener 2 and even the dyeing and finishing unit during the process of cutting or piercing the fabric 6. Therefore, this embodiment can automatically, timely, and reliably form a cut on the fabric 6 when the fabric 6 runs abnormally due to being wound around the calender roll of the calender 1, enabling the fabric 6 to be torn, instantaneously releasing the soared tension, thereby avoiding the bending and breaking of the rolls of the weft straightener 2, eliminating the potential safety hazards to personnel and equipment production caused by excessive fabric 6 tension, avoiding the expansion of problems, which helps to reduce the risk of equipment damage, reduce the maintenance cost, improve the overall reliability of the production line, greatly avoid and reduce direct equipment losses, production interruption losses, product quality losses, and time cost losses, and helps to improve the overall working efficiency of the production line and enhance the competitiveness of the enterprise.

[0055] In this embodiment, there can be types of detection devices 4. Now, two types are listed:

[0056] The first type, such as Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the detection device 4 is a displacement sensor 4a, which detects the displacement of the cloth receiving roller of the cloth receiving mechanism 7 caused by the change in the tension of the fabric 6.

[0057] The second type, such as 1 and Figure 5 As shown, the detection device 4 is a tension sensor, which detects the tension of the fabric 6. The tension sensor can be a tension roller 4b. The tension roller 4b is rotatably supported on a frame 8, and the fabric 6 bypasses the tension roller 4b.

[0058] In this embodiment, the structure of the cloth receiving mechanism 7 can be various. Now, two types are listed:

[0059] The first type, the cloth receiving mechanism 7 includes a cloth receiving roller assembly 71. The cloth receiving roller assembly 71 includes a roller seat and a cloth receiving roller. The roller seat is configured to move in the direction of storing and releasing the cloth. The cloth receiving roller is rotatably supported on the roller seat and presses the fabric 6 against its roller surface.

[0060] The second type, the cloth receiving mechanism 7 includes:

[0061] A cloth receiving roller assembly 71, including a roller seat and a cloth receiving roller. The roller seat is configured to move in the direction of storing and releasing the cloth. The cloth receiving roller is rotatably supported on the roller seat, and the fabric 6 bypasses the cloth receiving roller;

[0062] An elastic force applying assembly 72. The elastic force applying assembly 72 acts on the roller seat. When the fabric 6 is tensioned, the cloth receiving roller assembly 71 overcomes the resistance applied by the elastic force applying assembly 72 to displace.

[0063] The structure of the elastic force applying assembly 72 can be selected as, for example, Figure 4 , Figure 5 shown, a cylinder or a gas spring 72a, etc. It can also be, for example, Figure 2 , Figure 3 , Figure 6 and Figure 7 shown, a structure including a support rod 721b and a spring 722b. One end of the support rod 721b is connected to the roller seat, and the other end is movably inserted into the frame 8; the spring 722b is sleeved on the support rod 721b, one end abuts against the step on the support rod 721b, and the other end abuts against the frame 8. In order to adjust the pre-tightening force of the spring 722b, a height-adjustable pressing plate can be installed on the frame 8. The other end of the support rod 721b passes through the pressing plate, and the other end of the spring 722b abuts against the frame 8 by abutting against the pressing plate. A nut block can also be threadedly connected to the support rod 721b to form a step on the support rod 721b. It can also be selected as, for example, Figure 8 shown, a structure including a tension spring 72c. One end of the tension spring is connected to the frame 8, and the other end is connected to the roller seat.

[0064] In this embodiment, for example, Figures 1 to 8As shown, a linear guide rail 81 extending in the direction of storing and releasing the cloth can be provided on the frame 8, and the roller seat is slidably installed on the linear guide rail 81. It should be noted that the cloth holding roller can hold the cloth because both sides of the cloth holding roller have cloth guide rollers 9 facing the same side in the direction of storing and releasing the cloth and exceeding the cloth guide roller for the cloth 6 to bypass. The cloth guide rollers 9 can be the safety protection device based on the fabric tension detection itself, or can be other devices on both sides of the safety protection device based on the fabric tension detection.

[0065] The direction of storing and releasing the cloth can be up and down, left and right, front and back, etc., depending on the winding direction of the fabric. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 The directions of storing and releasing the cloth shown are up and down. Figure 7 The directions of storing and releasing the cloth shown are left and right.

[0066] In the case where the elastic force-applying component 72 is not provided, the cloth-holding roller component 71 can be driven to move by the fabric 6 only when the fabric tension reaches or exceeds the preset value. After the elastic force-applying component 72 in this embodiment is provided, the cloth-holding roller component 71 can also be driven to move by the fabric 6 before the fabric tension reaches the preset value. The greater the movement of the cloth-holding roller component 71, the greater the tension of the fabric 6 needs to be. When the detection device 4 detects that the signal value corresponding to the change in the tension of the fabric 6 reaches the preset value, the controller triggers the action of the cloth-breaking mechanism 5. In other words, by providing the elastic force-applying component 72, before the tension reaches the preset value, although the cloth-holding roller component 71 will also move, the cloth-breaking mechanism 5 will not be triggered. Before the tension rises to the preset value, the entire device can adjust the fabric tension by changing its cloth-holding amount.

[0067] In this embodiment, if Figure 9 , Figure 10 and Figure 11 As shown, the rag mechanism 5 includes a rag assembly 51 and a moving drive mechanism 52 . The moving drive mechanism 52 is connected to the rag assembly 51 and is used to drive the rag assembly 51 to move toward the fabric 6 to cut or pierce the fabric 6 .

[0068] Among them, the moving driving mechanism 52 can only drive the rag component 51 to move towards the surface of the fabric 6, driving the rag component to cut or pierce the fabric 6. The moving driving mechanism 52 can also only drive the rag component 51 to move in the width direction of the fabric 6, driving the rag component 51 to move towards the fabric 6 in the width direction of the fabric 6, only cutting the edge of the fabric 6 or a part of the fabric 6 in the width direction or completely cutting the fabric 6 in the width direction of the fabric. The moving driving mechanism 52 can also be capable of driving the rag component 51 to move towards the surface of the fabric 6 and move in the width direction of the fabric 6. The moving driving mechanism 52 can use a cylinder, an electric cylinder, an electromagnet, a synchronous belt, etc. as the power mechanism.

[0069] In this embodiment, the rag mechanism 5 can be as Figure 10 and Figure 11 shown, only configured on one side of the fabric 6, and one, two, three, etc. can be configured to pierce or cut the fabric, preferably cutting one side edge of the fabric 6. It can also be as Figure 9 shown, distributed on both sides of the fabric 6 in the width direction of the fabric 6, with one, two, three, etc. configured on each side, simultaneously cutting or piercing both sides of the fabric 6 to improve the reliability of emergency cutting, preferably cutting two side edges of the fabric 6 simultaneously. Generally, piercing or edge cutting or partial cutting can be adopted. For extremely few types of fabrics 6 that are not easily torn even with partial cutting, full-width cutting can be selected.

[0070] Now, eight specific structures of the safety protection device based on fabric tension detection are listed to introduce the above solutions in detail.

[0071] First, as Figure 1 shown, the detection device 4 uses a tension roller 4b to directly detect the tension of the fabric 6. The fabric accommodating mechanism 7 includes a fabric accommodating roller assembly 71, and no elastic force applying assembly 72 is configured. The fabric accommodating roller assembly 71 presses the fabric 6 by its own weight.

[0072] Second, as Figure 2 shown, the detection device 4 uses a displacement sensor 4a. The fabric accommodating mechanism 7 includes a fabric accommodating roller assembly 71 and an elastic force applying assembly 72. The lower roller surface of the fabric accommodating roller presses the fabric 6. The elastic force applying assembly 72 adopts a structure including a support rod 721b and a spring 722b. The displacement sensor 4a is installed on the frame 8, and by detecting the displacement of the step of the support rod 721b, the purpose of detecting the displacement of the fabric accommodating roller is achieved.

[0073] Third, as Figure 3 shown, the difference from the second type is that the installation position of the displacement sensor 4a on the frame 8 is different. In this structure, the displacement sensor 4a detects the displacement of the end face of the support rod 721b away from the fabric accommodating roller to achieve the purpose of detecting the displacement of the fabric accommodating roller.

[0074] Fourth, asFigure 4 As shown, the detection device 4 uses a displacement sensor 4a, and the elastic force - applying component 72 of the fabric - containing mechanism 7 uses a gas spring 72a. A mating plate is installed at the position where the gas spring 72a is connected to the roller seat of the fabric - containing roller assembly. The displacement sensor 4a detects the displacement of the mating plate to achieve the purpose of detecting the displacement of the fabric - containing roller.

[0075] The fifth type, as Figure 5 shown, the difference from the first type is that the fabric - containing mechanism 7 is configured with an elastic force - applying component 72, and the elastic force - applying component 72 uses a gas spring 72a. In this structure, preferably, the preset value of the fabric 6 tension that triggers the rag - breaking mechanism 5 < the tension threshold value of the fabric 6 that causes the fabric - containing amount of the fabric - containing mechanism 7 to decrease < the load of the reference roller; where the reference roller is the roller with the smallest load amount among all the rollers of the weft straightening machine 2. That is to say, when the tension value detected by the tension roller 4b reaches the preset value, the controller triggers the rag - breaking mechanism 5 to act. At this time, the threshold value for the compression of the gas spring 72a of the fabric - containing mechanism 7 has not been reached, nor has the load amount of the reference roller been reached. During the delay period from when the controller triggers the rag - breaking mechanism 5 to when the rag - breaking mechanism 5 completes cutting or piercing, the fabric 6 tension first reaches the compression threshold value of the gas spring 72a, causing the gas spring 72a to compress, and the fabric 6 tension is reduced by releasing the fabric - containing amount. Before the reference roller deforms or breaks, the fabric 6 is cut or pierced, so as to tear the fabric 6 before the fabric 6 tension reaches the load amount of the reference roller. Setting the tension threshold value that reduces the fabric - containing amount of the fabric - containing mechanism 7 to be greater than the preset value of the tension that triggers the rag - breaking mechanism 5 can avoid the release of the fabric - containing amount under non - emergency circumstances, thereby reducing the frequency of the fabric - containing mechanism 7 releasing the fabric 6, and avoiding abnormalities due to frequent use, which may affect the use in emergency situations.

[0076] The sixth type, as Figure 6 shown, the difference from the second type is that the lower roller surface of the fabric - containing roller presses tightly against the fabric 6.

[0077] The seventh type, as Figure 7 shown, the difference from the second type is that the left roller surface of the fabric - containing roller presses tightly against the fabric 6.

[0078] The eighth type, as Figure 8 shown, the difference from the sixth type is that the elastic force - applying component 72 uses a tension spring 72c.

[0079] Embodiment 2

[0080] A weft straightening machine 2 includes the safety protection device based on fabric tension detection in Embodiment 1.

[0081] Embodiment 3

[0082] As Figure 12As shown in the figure, a dyeing and finishing unit includes the safety protection device based on fabric tension detection in Embodiment 1. The dyeing and finishing unit further includes a calender 1, a weft straightener 2, and a stenter 3 that are sequentially arranged along the running path of the fabric 6. The safety protection device based on fabric tension detection is arranged on the fabric running path between the calender 1 and the stenter 3.

[0083] Embodiment 4

[0084] A dyeing and finishing unit includes the weft straightener 2 in Embodiment 2.

[0085] Enlightened by the above ideal embodiments based on the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A safety protection device based on fabric tension detection, characterized in that: include: A detection device (4) for detecting a signal value corresponding to a change in tension of the fabric (6); a ripping mechanism (5) for cutting or piercing the fabric (6) when triggered; A controller, connected to the detection device (4) and the cloth-breaking mechanism (5), respectively, and configured to trigger the cloth-breaking mechanism (5) when the value of the signal received by the controller exceeds a preset value; At least one cloth holding mechanism (7) is arranged on the running path of the fabric (6) and is used for holding the fabric.

2. The safety protection device based on fabric tension detection according to claim 1 is characterized in that: The detection device (4) is a displacement sensor (4a) used to detect the displacement of the cloth holding roller of the cloth holding mechanism (7) caused by the change in the tension of the fabric (6).

3. The safety protection device based on fabric tension detection according to claim 1 is characterized in that: The detection device (4) is a tension sensor, which is used to detect the tension of the fabric (6).

4. The safety protection device based on fabric tension detection according to claim 3 is characterized in that: The tension sensor is a tension roller (4b), the tension roller (4b) is rotatably supported on a frame (8), and the fabric (6) passes around the tension roller (4b).

5. The safety protection device based on fabric tension detection according to claim 1 is characterized in that: The cloth holding mechanism (7) comprises a cloth holding roller assembly (71), wherein the cloth holding roller assembly (71) comprises a roller seat and a cloth holding roller, wherein the roller seat is configured to be movable in the direction of storing and releasing cloth, and the cloth holding roller is rotatably supported on the roller seat and presses the fabric (6) with its roller surface.

6. The safety protection device based on fabric tension detection according to claim 5 is characterized in that: The cloth holding mechanism (7) further comprises an elastic force-applying component (72), wherein the elastic force-applying component (72) acts on the roller seat, and when the fabric (6) is tensioned, the cloth holding roller component (71) overcomes the resistance applied by the elastic force-applying component (72) to cause displacement.

7. The safety protection device based on fabric tension detection according to claim 6 is characterized in that: The elastic force applying component (72) comprises: A support rod (721b), one end of which is connected to the roller seat, and the other end of which is movably inserted into a frame (8); The spring (722b) is sleeved on the support rod (721b), one end of which abuts against the step on the support rod (721b), and the other end of which abuts against the frame (8).

8. The safety protection device based on fabric tension detection according to claim 1 is characterized in that: The rag mechanism (5) comprises a rag assembly (51) and a moving drive mechanism (52); the moving drive mechanism (52) is connected to the rag assembly (51) and is used to drive the rag assembly (51) to move toward the fabric (6) so as to cut or pierce the fabric (6).

9. The safety protection device based on fabric tension detection according to claim 1, characterized in that: At least one rag mechanism (5) is provided on the side of the fabric (6) facing upward; Or at least one of the rag mechanisms (5) is respectively provided on both sides of the fabric (6) facing upward.

10. A weft straightening machine, characterized in that: A safety protection device based on fabric tension detection comprising any one of claims 1 to 9.

11. A dyeing and finishing unit, characterized in that: It comprises the safety protection device based on fabric tension detection as described in any one of claims 1 to 9 or the weft straightening machine as described in claim 10.

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