Width detection device

Abstract

The invention discloses a width detection device, and belongs to the technical field of thin material slitting, the width detection device comprises a detection rod and a sensor slide rail which are installed on a structural plate, a sensor is arranged on the sensor slide rail, a detection gap is formed between the sensor and the detection rod so that a thin material can pass through the detection gap for width detection, and the detection rod has a detection state and a separation state. When the detection rod is in the detection state, the detection rod is attached to the thin material, and the sensor detects the width of the thin material; and when the detection rod is in the separation state, the detection rod is separated from the thin material. During detection, the detection rod is attached to the thin material, and when the detection rod is not used for detection, the detection rod is separated from the thin material, so that powder of the thin material is prevented from falling on the detection rod, misjudgment of the sensor is prevented, and the accuracy of measured width data is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of thin material slitting, especially the technical field of aluminum foil slitting or copper foil slitting, and particularly relates to a width detection device. Background Art

[0002] At present, the cutting of thin materials itself is a difficult problem in the market. While requiring no wrinkles in the cutting of thin materials, it is necessary to precisely meet the requirements of the cutting width. Basically, manual measurement is adopted in the market. Thin materials can be aluminum foil or copper foil, which can be respectively applied to the positive and negative electrodes of batteries and are one of the main materials of energy batteries. Therefore, the width accuracy requirements for aluminum foil cutting or copper foil cutting are more stringent. The following will specifically illustrate through aluminum foil slitting, and similar problems also exist in copper foil slitting.

[0003] An aluminum foil slitter is a mechanical device for slitting and trimming aluminum foil materials. Its main function is to slit wide aluminum foil into multiple narrow aluminum foils with specific widths and lengths through a cutting process. Since most aluminum foils are used in fields with high precision such as batteries, the requirement for width accuracy is very high.

[0004] In the prior art, the width detection of the rewinding of the slitter cannot be accurate. Because the working principle of the existing width detection sensor is to judge by identifying the difference between the aluminum foil coating device and the aluminum foil. However, when the slitter works for a long time, aluminum powder will fall on the aluminum foil coating device, and the sensor will also identify the part coated with aluminum powder as aluminum foil. Therefore, the obtained width data is inaccurate. If measured manually, the slitter needs to be stopped before measurement, and the measurement result is not as accurate as that of the sensor.

[0005] Therefore, it is urgent to design a width detection device to solve the situation where powder falls on the thin material due to cutting and then causes inaccurate measurement accuracy. For example, when the slitter works for a long time, aluminum powder falls on the aluminum foil coating device, resulting in inaccurate width data measured. Summary of the Invention

[0006] To solve the above-mentioned technical problems, a width detection device is provided.

[0007] To achieve the above object, the specific technical solution of the width detection device of the present invention is as follows: A width detection device includes a detection rod and a sensor slide rail installed on a structural plate. A sensor is provided on the sensor slide rail. A detection gap is formed between the sensor and the detection rod for a thin material to pass through the detection gap for width detection. The detection rod includes a detection state and a disengaged state. When the detection rod is in the detection state, the detection rod is in contact with the thin material, and the sensor detects the width of the thin material. When the detection rod is in the disengaged state, the detection rod is disengaged from the thin material.

[0008] Furthermore, a driving member is installed on the structural plate, and the output end of the driving member is connected to the detection rod. When the detection rod is in the detection state, the driving member controls the detection rod to be in the detection position so that the detection rod is in contact with the thin material. When the detection rod is in the disengaged state, the driving member controls the detection rod to be in the disengaged position so that the detection rod is disengaged from the thin material. The detection rod is detachably connected to the structural plate. The detection rod is selected to be made of a material that produces a signal difference during optical detection with the thin material.

[0009] Furthermore, a swing support is installed on the structural plate, and a detection bracket is rotatably connected to the swing support. The swing support is located in the middle of the detection bracket so as to divide the detection bracket into an active swing section and a driven swing section through the swing support. The driving member is connected to the active swing section of the detection bracket, and the detection rod is connected to the driven swing section of the detection bracket.

[0010] Furthermore, a locking member is fixedly connected to the driven swing section, and the driven swing section is detachably connected to the detection rod through the locking member.

[0011] Furthermore, the locking member includes a clamping block. The clamping block is fixedly connected to the driven swing section. A groove for placing the detection rod is formed on the clamping block. A locking block is provided in the opening direction of the groove. The locking block and the groove together form a locking ring. One end of the locking block is hinged to the clamping block through a pin shaft. A through hole is formed at the end of the locking block far from the pin shaft. A locking handle passes through the through hole and is screwed to the clamping block. By rotating the locking handle, the locking ring is tightened against the detection rod for fixation.

[0012] Furthermore, air holes are formed on the detection rod so that the detection rod blows air outwards, thereby forming an air cushion when the detection rod is in contact with the thin material. Alternatively, a synchronization mechanism is also provided. The synchronization mechanism cooperates with the driving member to make the operating speed of the detection rod synchronous with the running speed of the thin material.

[0013] Furthermore, the driving member includes a cylinder. The piston end of the cylinder is connected to the active swing section. By controlling the extension or contraction of the piston end of the cylinder, the detection bracket is rotated clockwise or counterclockwise around the swing support.

[0014] Furthermore, a cylinder base is provided on the cylinder. The end of the cylinder base far from the cylinder is fixedly connected to the structural plate, so as to control the telescopic direction of the piston end of the cylinder through the installation angle of the cylinder base.

[0015] Furthermore, a sensor bracket is provided on the sensor. A slider is slidably connected to the sensor slide rail. The sensor bracket is connected to the slider so that the sensor is slidably connected to the sensor slide rail.

[0016] Furthermore, vertical slots are provided on the sensor bracket, and first and second waist-shaped slots are provided on the slider. The equal-height sleeve bolts pass through the vertical slots and are screwed to the slider so that the sensor bracket can rotate or slide relative to the slider. The first adjustment bolt passes through the vertical slot and is screwed to the first or second waist-shaped slot to fix the sensor bracket to the slider.

[0017] The width detection device of the present invention has the following advantages: Compared with directly detecting on the roller of the overly thin material, the present invention provides a detection rod that can be freely controlled to increase itself, and can achieve two states of detection and detachment without affecting the normal operation of the equipment; When the present invention is detecting, the detection rod is in contact with the thin material. When not detecting, the detection rod is disengaged from the thin material, which can reduce scratches on the thin material, reduce the probability of thin material powder falling on the detection rod, prevent misjudgment of the sensor, and thus ensure the accuracy of the measured width data.

[0018] The detection rod provided by the present invention can be detached, removable, and can be cleaned at any time without affecting the normal operation of the machine, and also reduces the probability of gold powder falling on the detection rod. The detection rod can tension the thin material to facilitate detection and scanning, and subsequently, the material of the detection rod can be selected and replaced according to the material characteristics of the detected material, making the optical recognition signal more obvious and improving the detection accuracy.

[0019] In order to further avoid scratches on the thin material when detecting the width, the detection rod of the present invention is provided with a blowing function. When in contact with the thin material, air holes blow outwards to form an air cushion, thus forming a protective layer between the thin material and the detection rod to prevent the thin material from being scratched. Moreover, the detection rod is detachably connected to the detection bracket, which is convenient for cleaning and maintenance; at the same time, the speed of the detection rod can be synchronized with that of the thin material when passing through the roller, so that the detection rod and the thin material are relatively stationary, thus avoiding scratching between the two.

[0020] The width detection device of the present invention can perform on-line width measurement during the slitting of thin materials, without the need to stop the machine for measurement, improving the working efficiency while ensuring the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the width detection device of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the detection rod of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the sensor guide rail of the present invention.

[0024] Figure 4 It is of the present invention Figure 3 Partial enlarged view of A therein.

[0025] Figure 5 This is a schematic diagram of the specific application of the width detection device of the present invention.

[0026] Marking description in the figure: 1, structural plate; 2, detection bracket; 201, active swing section; 202, driven swing section; 203, locking member; 2031, clamping block; 2032, locking block; 2033, pin shaft; 2034, locking handle; 2035, through hole; 3, detection rod; 301, air hole; 4, sensor slide rail; 401, sensor; 402, sensor bracket; 403, slider; 404, vertical slot; 405, first kidney-shaped slot; 406, second kidney-shaped slot; 407, equal-height sleeve bolt; 408, first adjustment bolt; 5, swing support; 6, cylinder; 601, piston end; 602, cylinder base; 7, aluminum foil; 8, knife groove roller; 9, rubber roller; 10, winding air shaft; 11, guide roller. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments but not other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0029] Next, refer to the attached Figure 1 to the attached Figure 5 to describe the width detection device of the present invention.

[0030] In the case of the existing aluminum foil slitter working for a long time, aluminum powder will fall on the device covered with aluminum foil. In the method of using the sensor 401 for automatic scanning and identifying the width of the aluminum foil 7, the sensor 401 will also identify the part covered with aluminum powder as the aluminum foil 7. Therefore, the obtained width data is inaccurate. If the manual measurement method is adopted, the slitter needs to be stopped before measurement, and the measurement result is not as accurate as that measured by the sensor 401.

[0031] Therefore, the present invention provides a width detection device, such as Figure 1As shown in the figure, it includes a detection rod 3 and a sensor slide rail 4 installed on a structural plate 1. A sensor 401 is provided on the sensor slide rail 4. A detection gap is formed between the sensor 401 and the detection rod 3 for the aluminum foil 7 to pass through the detection gap for width detection. The detection rod 3 includes a detection state and a disengaged state. When the detection rod 3 is in the detection state, the detection rod 3 is in contact with the aluminum foil 7, and the sensor 401 detects the width of the aluminum foil 7. When the detection rod 3 is in the disengaged state, the detection rod 3 is disengaged from the aluminum foil 7. Specifically, the detection rod 3 is in contact with the aluminum foil 7, and at the same time, the paper path of the aluminum foil 7 is tensioned to facilitate the scanning of the sensor 401. The sensor 401 differentiates the materials of the detection rod 3 and the aluminum foil 7 to detect the width of the aluminum foil 7. When the detection rod 3 is disengaged from the aluminum foil 7, the probability of aluminum powder falling onto the detection rod 3 is reduced, and the detection rod 3 can be cleaned at any time without affecting the normal operation of the machine. Also, when the detection rod 3 is in the disengaged state, scratching of the aluminum foil 7 can be avoided.

[0032] Meanwhile, it can be understood that the material of the detection rod 3 should be selected to be significantly different from that of the aluminum foil 7, which is not limited here. The purpose is to increase the difference in the feedback signals when the sensor 401 identifies, so as to ensure the accuracy of the measurement.

[0033] Preferably, a driving member is installed on the structural plate 1, and the output end of the driving member is connected to the detection rod 3. When the detection rod 3 is in the detection state, the driving member controls the detection rod 3 to be in the detection position, so that the detection rod 3 is in contact with the aluminum foil 7. When the detection rod 3 is in the disengaged state, the driving member controls the detection rod 3 to be in the disengaged position, so that the detection rod 3 is disengaged from the aluminum foil 7. The detection rod 3 is detachably connected to the structural plate 1, and the connection manner between the driving member and the detection rod 3 can be flexibly set according to the actual situation. It can adopt mechanical connection. For example, the detection rod 3 and the driving member are directly connected by screws, pins or other fasteners, and the driving member directly controls the detection rod 3 to be in the detection position or the disengaged position. It can also be connected by gear transmission. The detection rod 3 is eccentrically connected to the rotating shaft of the gear, and the driving member drives the detection rod 3 to rotate by driving different gear sets formed by gears to control the detection rod 3 to be in the detection position or the disengaged position, etc.

[0034] Preferably, as Figure 2As shown in the figure, a swing support 5 is installed on the structural plate 1, and a detection bracket 2 is rotatably connected to the swing support 5. The swing support 5 is located in the middle of the detection bracket 2, so that the detection bracket 2 is divided into an active swing section 201 and a driven swing section 202 by the swing support 5. The driving member is connected to the active swing section 201 of the detection bracket 2, and the detection rod 3 is connected to the driven swing section 202 of the detection bracket 2. Specifically, the driving member drives the active swing section 201 to swing, thereby driving the driven swing section 202 to swing, and further controlling the position of the detection rod 3 on the driven swing section 202, that is, controlling the detection rod 3 to be in contact with or separated from the aluminum foil 7. In a specific embodiment, the detection bracket 2 and the sensor slide rail 4 are arranged downstream of the slitting roller 8 to measure the width of the slit aluminum foil 7. When detecting the width of the aluminum foil 7, the driving member drives the detection bracket 2 to swing to the detection position, that is, the detection rod 3 is in contact with and tensioned with the aluminum foil 7. At this time, the sensor 401 moves periodically along the sensor slide rail 4, so that the sensor 401 scans the detection rod 3 and the aluminum foil 7 periodically. The sensor 401 accurately identifies the materials of the detection rod 3 and the aluminum foil 7 to obtain the slitting width; when the detection is completed, the driving member drives the detection bracket 2 to swing to the separation position, so that the detection rod 3 is separated from the aluminum foil 7 to prevent the detection rod 3 from being contaminated with aluminum powder.

[0035] Preferably, a locking member 203 is fixedly connected to the driven swing section 202. The driven swing section 202 is detachably connected to the detection rod 3 through the locking member 203, so as to facilitate the maintenance and cleaning of the detection rod 3, thereby ensuring that the detection rod 3 will not be contaminated with aluminum powder and ensuring the accuracy of width measurement.

[0036] Preferably, the locking member 203 includes a clamping block 2031. The clamping block 2031 is fixedly connected to the driven swing section 202. A groove for placing the detection rod 3 is formed on the clamping block 2031. A locking block 2032 is arranged in the opening direction of the groove. The locking block 2032 and the groove jointly form a locking ring. One end of the locking block 2032 is hinged to the clamping block 2031 through a pin shaft 2033. A through hole 2035 is formed at the end of the locking block 2032 away from the pin shaft 2033. The locking handle 2034 passes through the through hole 2035 and is screwed to the clamping block 2031. The locking handle 2034 is rotated to make the locking ring abut against and fix the detection rod 3.

[0037] Preferably, air holes 301 are formed on the detection rod 3 to blow air out of the detection rod 3, so as to form an air cushion when the detection rod 3 is in contact with the aluminum foil 7, that is, to form an air flow between the detection rod 3 and the aluminum foil 7, so that the detection rod 3 is separated from the aluminum foil 7, thereby preventing the aluminum foil 7 from being scratched. In a specific embodiment, in order to prevent the aluminum foil 7 from being scratched, the detection rod 3 can be set as a powder metallurgy shaft.

[0038] Another way can also be selected, that is, to make the rotation speed of the detection rod synchronized with the aluminum foil conveying speed, and the two are relatively stationary. Of course, in actual applications, it is impossible to achieve complete stillness, and a certain amount of sliding within an acceptable range is acceptable. Therefore, the above method can reduce the scratching of the aluminum foil by the detection rod. In specific practice, a synchronization mechanism can be selected to have the same driving force and maintain the same speed as the foil roller for conveying aluminum foil. For example, the synchronization link is connected to the driving motor. In a specific embodiment, it can be set as follows: bearings are fixedly connected to both ends of the detection rod 3, the detection rod 3 is fixedly connected to the inner ring of the bearing, and the locking member 203 is fixedly connected to the outer ring of the bearing, so that the locking member 203 is rotationally connected to the detection rod 3. At the same time, a driven runner is arranged on the detection rod 3, and a motor is drivingly connected to the driven runner. The motor drives the driven runner to rotate, and the driven runner drives the detection rod 3 to rotate. Among them, the motor is connected to the PLC module of the machine, and the PLC module controls the output rotation speed of the motor to achieve the synchronous rotation of the detection rod 3 and the cutter groove roller 8, so that the detection rod 3 rotates synchronously with the aluminum foil 7, and further, when the detection rod 3 fits and tensions the aluminum foil 7, the aluminum foil 7 will not be scratched.

[0039] Preferably, the driving member of the present invention can be selected according to actual needs. According to different connection methods between the detection rod 3 and the structural plate 1, a synchronous motor, a stepping motor, a cylinder, etc. can be selected, and there is no limitation here. For example Figure 2 As shown, according to the connection method between the detection rod 3 and the structural plate 1 in the embodiment of the present invention, a cylinder 6 is selected as the driving member. Therefore, the structure in this embodiment is set as: the driving member includes a cylinder 6, and the piston end 601 of the cylinder 6 is connected to the active swing section 201. By controlling the extension or contraction of the piston end 601 of the cylinder 6, the detection bracket 2 can be rotated clockwise or counterclockwise around the swing support 5.

[0040] Preferably, a cylinder base 602 is provided on the cylinder 6, and one end of the cylinder base 602 away from the cylinder 6 is fixedly connected to the structural plate 1, so as to control the telescopic direction of the piston end 601 of the cylinder 6 by adjusting the installation angle of the cylinder base 602, so as to avoid unnecessary forces generated by the cylinder 6 on the detection bracket 2 and shorten the service life of the detection bracket 2 and the swing support 5.

[0041] Preferably, as Figure 3 and Figure 4 shown, a sensor bracket 402 is provided on the sensor 401, and a slider 403 is slidably connected to the sensor slide rail 4. The sensor bracket 402 is connected to the slider 403, so that the sensor 401 is slidably connected to the sensor slide rail 4.

[0042] Preferably, a vertical slot 404 is formed in the sensor bracket 402, and a first kidney-shaped slot 405 and a second kidney-shaped slot 406 are formed in the slider 403. The equal-height sleeve bolt 407 passes through the vertical slot 404 and is screwed to the slider 403, so that the sensor bracket 402 can rotate or slide relative to the slider 403. The first adjusting bolt 408 passes through the vertical slot 404 and is screwed to the first kidney-shaped slot 405 or the second kidney-shaped slot 406 to fix the sensor bracket 402 and the slider 403. Specifically, the slider 403 is movably connected to the sensor bracket 402 through the equal-height sleeve bolt 407, so that the sensor 401 can slide or rotate relative to the equal-height sleeve bolt 407, thereby increasing the adjustment range of the sensor bracket 402. After being adjusted to an appropriate position, the first adjusting bolt 408 is used to fix the sensor bracket 402 and the slider 403, so that the sensor 401 can adjust both the height and the tilt angle, realizing the fine adjustment of the sensor 401, and enabling the sensor 401 to vertically irradiate on the detection rod 3 to ensure the accuracy of recognition.

[0043] In practical applications, as a preferred embodiment, as Figure 5 shown, the aluminum foil 7 forms an upper paper path and a lower paper path after passing through the knife groove roller 8. The aluminum foil 7 in the upper paper path is pulled by the rubber roller 9 in the upper paper path and wound on the winding air shaft 10 in the upper paper path. After the aluminum foil 7 in the lower paper path is reversed by the guide roller 11, it is pulled by the rubber roller 9 in the lower paper path and wound on the winding air shaft 10 in the lower paper path. Therefore, in order to simultaneously detect the width of the aluminum foil 7 in the upper paper path and the width of the aluminum foil 7 in the lower paper path, the detection bracket 2 and the sensor slide rail 4 are installed between the knife groove roller 8 and the rubber roller 9 in the upper paper path and between the knife groove roller 8 and the rubber roller 9 in the lower paper path, and the detection bracket 2 is set in two groups, upper and lower. Two sensors 401, upper and lower, are arranged on the sensor slide rail 4. The detection rod 3 on the upper paper path detection bracket 2 cooperates with the sensor 401 that irradiates upward, and the detection rod 3 on the lower paper path detection bracket 2 cooperates with the sensor 401 that irradiates downward, thereby realizing the synchronous detection of the width of the aluminum foil 7 in the upper paper path and the width of the aluminum foil 7 in the lower paper path.

[0044] In the present invention, the sensor 401 determines whether it is shining on the paper path by differentiating the signals fed back by the detection rod 3 and the aluminum foil 7. Since the falling of aluminum powder onto the detection rod 3 will affect the differentiation and recognition of the detection rod 3 and the aluminum foil 7 by the sensor 401, the detection rod 3 only adheres to the aluminum foil 7 for recognition during detection, and is disengaged from the aluminum foil 7 when not in detection. The detection rod 3 is provided with a blowing function to form an air cushion on the detection rod 3, preventing the detection rod 3 from scratching the surface of the aluminum foil 7 when the detection rod 3 adheres to the aluminum foil 7. Moreover, the detection rod 3 can be disassembled and cleaned to prevent the aluminum powder from falling onto the surface of the detection rod 3 after long-term use and affecting the recognition of the sensor 401. The sensor 401 calculates the width of the wound aluminum foil 7 after slitting by identifying the feedback signals from the detection rod 3 to the aluminum foil 7 and from the aluminum foil 7 to the detection rod 3, and outputs the numerical value to the human-machine interface. The operator can directly read the data from the human-machine interface without manual adjustment. The entire width detection process does not require the machine to stop, enabling real-time monitoring during operation.

[0045] During detection in the present invention, the detection rod 3 adheres to the aluminum foil 7, and when not in detection, the detection rod 3 is disengaged from the aluminum foil 7, avoiding the falling of aluminum powder onto the detection rod 3 and preventing misjudgment by the sensor 401, thereby ensuring the accuracy of the measured width data.

[0046] The detection rod 3 of the present invention is provided with a blowing function. When it adheres to the aluminum foil 7, the air holes 301 blow outwards to form an air cushion, thus constituting a protective layer between the aluminum foil 7 and the detection rod 3 to prevent the aluminum foil 7 from being scratched. Moreover, the detection rod 3 is detachably connected to the detection bracket 2, facilitating cleaning and maintenance.

[0047] The width detection device of the present invention can perform on-line width measurement during the slitting of the aluminum foil 7, without the need to stop the machine for measurement, improving the work efficiency while ensuring the accuracy of the measurement.

[0048] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A width detection device, characterized in that, It includes a detection rod and a sensor slide rail installed on a structural plate. A sensor is provided on the sensor slide rail, and a detection gap is formed between the sensor and the detection rod for a thin material to pass through the detection gap for width detection. The detection rod includes a detection state and a disengaged state. When the detection rod is in the detection state, the detection rod is in contact with the thin material, and the sensor detects the width of the thin material. When the detection rod is in the disengaged state, the detection rod is disengaged from the thin material.

2. The width detection device according to claim 1, characterized in that A driving member is installed on the structural plate, and the output end of the driving member is connected to the detection rod. When the detection rod is in the detection state, the driving member controls the detection rod to be in the detection position so that the detection rod is in contact with the thin material. When the detection rod is in the disengaged state, the driving member controls the detection rod to be in the disengaged position so that the detection rod is disengaged from the thin material. The detection rod is detachably connected to the structural plate. The detection rod is selected to be made of a material that generates a signal difference during optical detection with the thin material.

3. The width detection device according to claim 2, characterized in that, A swing support is installed on the structural plate. A detection bracket is rotatably connected to the swing support. The swing support is located in the middle of the detection bracket to divide the detection bracket into an active swing section and a driven swing section through the swing support. The driving member is connected to the active swing section of the detection bracket, and the detection rod is connected to the driven swing section of the detection bracket.

4. The width detection device according to claim 3, characterized in that, A locking member is fixedly connected to the driven swing section, and the driven swing section is detachably connected to the detection rod through the locking member.

5. The width detection device according to claim 4, characterized in that The locking member includes a clamping block. The clamping block is fixedly connected to the driven swing section. A groove for placing the detection rod is provided on the clamping block. A locking block is provided in the opening direction of the groove. The locking block and the groove together form a locking ring. One end of the locking block is hinged to the clamping block through a pin shaft. A through hole is provided at the end of the locking block away from the pin shaft. A locking handle passes through the through hole and is screwed to the clamping block. Rotating the locking handle makes the locking ring press against and fix the detection rod.

6. The width detection device according to claim 1 or 5, characterized in that, Air holes are provided on the detection rod to blow air outwards from the detection rod, so as to form an air cushion when the detection rod is in contact with the thin material. Alternatively, a synchronization mechanism is also provided. The synchronization mechanism cooperates with the driving member to make the running speed of the detection rod synchronized with the running speed of the thin material.

7. The width detection device according to claim 3, characterized in that The driving member includes a cylinder. The piston end of the cylinder is connected to the active swing section. By controlling the extension or contraction of the piston end of the cylinder, the detection bracket is rotated clockwise or counterclockwise around the swing support.

8. The width detection device according to claim 7, characterized in that A cylinder base is provided on the cylinder. The end of the cylinder base away from the cylinder is fixedly connected to the structural plate, so as to control the telescopic direction of the piston end of the cylinder through the installation angle of the cylinder base.

9. The width detection device according to claim 1, characterized in that A sensor bracket is provided on the sensor. A slider is slidably connected to the sensor slide rail. The sensor bracket is connected to the slider so that the sensor is slidably connected to the sensor slide rail.

10. The width detection device according to claim 9, characterized in that, Vertical slot holes are provided on the sensor bracket. First kidney-shaped slot holes and second kidney-shaped slot holes are provided on the slider. An equal-height sleeve bolt passes through the vertical slot holes and is screwed to the slider so that the sensor bracket can rotate or slide relative to the slider. A first adjustment bolt passes through the vertical slot holes and is then screwed to the first kidney-shaped slot hole or the second kidney-shaped slot hole to fix the sensor bracket and the slider.

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