Thickness detector for paper

Abstract

The utility model relates to the technical field of thickness detection devices, in particular to a thickness detector for paper, which comprises a detection table, a detector body, an ultrasonic probe and a cleaning device, the detector body is mounted at the rear end of the top wall of the detection table, and the ultrasonic probe is mounted on the bottom wall of one end, far away from a mounting point, of the detector body. The cleaning device is installed on the detection table, the positions of sliding blocks are adjusted by controlling rotation of threaded rods, the two sets of sliding blocks drive a moving frame to linearly move on a containing table and move along with the moving frame, the surface of the containing table is wiped and cleaned, meanwhile, a fan is started, water evaporation is accelerated, the surface of the containing table is helped to be dried, and an ultrasonic probe is started. Ultrasonic pulses are emitted to the paper, penetrate through the paper, are reflected on the back face of the paper and return to the probe, the thickness of the paper is calculated by measuring the round-trip time of ultrasonic waves, data fed back by the ultrasonic probe are recorded, and the thickness value of the paper is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of thickness detection devices, in particular to a thickness detector for paper. Background Art

[0002] As we all know, with the development of the printing and packaging industry, the quality control of paper has become more and more stringent. The thickness of paper is one of the important indicators to measure its quality, which directly affects the final performance of the product.

[0003] Traditional paper thickness detection methods often have the following problems: before the thickness test, dust and impurities on the placement table will affect the accuracy of the test results. During the test, the paper may warp or deform due to improper fixation, reducing the accuracy and precision of the test. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a paper thickness detector.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: A paper thickness detector, comprising a detection platform, a detector body, an ultrasonic probe and a cleaning device, wherein the detector body is mounted on the rear end of the top wall of the detection platform, and the ultrasonic probe is mounted on the bottom wall of the detector body at one end away from the mounting point; the cleaning device is mounted on the detection platform, and the cleaning device comprises a fixed frame, a threaded rod, a driving device, a slider, a movable frame, cleaning cotton, a water tank, a water pipe, a diversion pipe and a fan; a placement platform is mounted on the top of the detection platform, and the left and right ends of the placement platform are both mounted with the fixed frame with a side opening, the threaded rod is rotatably mounted in the fixed frame, the driving device is mounted on one end of two groups of threaded rods, the slider is threadedly mounted on the threaded rod, the movable frame is fixedly connected between the two groups of sliders, the water tank is mounted on the top of the movable frame, the water pipe is mounted on the bottom end of the water tank, the bottom end of the water pipe is connected to the diversion pipe, the cleaning cotton is mounted on the outer wall of the diversion pipe, and two groups of fans are symmetrically mounted on the side walls of the movable frame.

[0008] In order to facilitate driving the two groups of threaded rods to rotate simultaneously, the utility model is improved in that the driving device includes a rotating shaft, a driven bevel gear, a driving bevel gear and a driving motor. One end of the two groups of threaded rods passes through the side wall of the fixed frame and is installed with the rotating shaft. The outer wall of the rotating shaft is sleeved with the driven bevel gear, and one end of the driven bevel gear is meshed and connected with the driving bevel gear. The top wall of the detection table is installed with the driving motor, and the left and right output ends of the driving motor are respectively connected to the two groups of driving bevel gears.

[0009] In order to protect the driving device, the present invention has an improvement in that a protective shell is installed on the outer wall of the driving device.

[0010] In order to ensure that the paper is flat on the placement table, the utility model has the following improvements: a cylinder is embedded in the top of the detector body, and a lower pressure plate is installed at the output end of the cylinder, and the lower pressure plate is designed as a circular ring.

[0011] In order to ensure the stability and accuracy of the operation of the driving motor, the utility model is improved in that the driving motor is a servo motor.

[0012] In order to facilitate the installation of the detector body, the present invention is improved in that fixing plates are installed at both left and right ends of the bottom of the detector body, and bolts are threadedly installed on the fixing plates.

[0013] In order to facilitate the addition of water or cleaning liquid into the water tank, the utility model is improved in that a water inlet hopper is installed at the top of the water tank.

[0014] In order to prevent foreign matter from entering the water tank through the water inlet hopper, the utility model is improved in that a sealing cover is threadedly mounted on the water inlet hopper.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a paper thickness detector with the following beneficial effects:

[0017] The paper thickness tester has a cleaning device. Two sets of threaded rods drive two sets of slides to drive a mobile frame to move linearly on a placement table. As the mobile frame moves, the cleaning cotton wipes the surface of the placement table. At the same time, the fan accelerates the evaporation of water and helps dry the surface of the placement table. Cleaning the placement table can remove dust and impurities on the surface, avoid interference with the test results, and improve the accuracy and precision of the test results.

[0018] This paper thickness tester uses a cylinder and a circular lower pressure plate. The output end of the cylinder drives the lower pressure plate down, firmly fixing the paper on the placement table. The circular design can evenly distribute pressure to ensure that the paper remains flat throughout the entire detection area, avoiding warping or deformation of the paper. The circular design can also prevent the area detected by the ultrasonic probe from being over-squeezed, ensuring the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first angle;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second angle;

[0021] Figure 3 This is a schematic diagram of the hidden three-dimensional structure of the protective shell of the utility model;

[0022] Figure 4 This is a schematic diagram of the half-section three-dimensional structure of the movable rack and cleaning cotton of the utility model.

[0023] In the figure: 1. Test table; 2. Tester body; 3. Ultrasonic probe; 4. Fixed frame; 5. Threaded rod; 6. Slider; 7. Mobile frame; 8. Cleaning cotton; 9. Water tank; 10. Water guide pipe; 11. Diverter pipe; 12. Fan; 13. Placement table; 14. Rotating shaft; 15. Driven bevel gear; 16. Driving bevel gear; 17. Drive motor; 18. Protective shell; 19. Cylinder; 20. Lower pressure plate; 21. Fixed plate; 22. Bolt; 23. Water inlet hopper; 24. Sealing cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-4A paper thickness detector includes a detection platform 1, a detection instrument body 2, an ultrasonic probe 3 and a cleaning device. The detection instrument body 2 is installed at the rear end of the top wall of the detection platform 1, and the ultrasonic probe 3 is installed on the bottom wall of the detection instrument body 2 away from the installation point. The cleaning device is installed on the detection platform 1, and the cleaning device includes a fixed frame 4, a threaded rod 5, a driving device, a slider 6, a movable frame 7, a cleaning cotton 8, a water tank 9, a water guide pipe 10, a diversion pipe 11 and a fan 12. A placement table 13 is installed on the top of the detection platform 1. The placement table 13 The left and right ends are both equipped with the fixed frame 4 with a side opening, the threaded rod 5 is rotatably installed in the fixed frame 4, one end of the two groups of threaded rods 5 is equipped with the driving device, the threaded rod 5 is threadedly installed with the slider 6, the two groups of sliders 6 are fixedly connected with the mobile frame 7, the top of the mobile frame 7 is equipped with the water tank 9, the bottom end of the water tank 9 is equipped with a water pipe 10, the bottom end of the water pipe 10 is connected to the diversion pipe 11, the outer wall of the diversion pipe 11 is equipped with the cleaning cotton 8, and the side wall of the mobile frame 7 is symmetrically equipped with two groups of The fan 12 is described above. In this embodiment, when in use, before the thickness of the paper is detected, it is first necessary to use a cleaning device to clean the surface of the placement table 13. The control valve installed on the water pipe 10 (as shown in the accompanying figure) is started, and the water or cleaning liquid in the water tank 9 is evenly flowed onto the cleaning cotton 8 through the water pipe 10 and the diversion pipe 11. After the cleaning cotton 8 is wetted, the driving device is started, and the position of the slider 6 is adjusted by controlling the rotation of the threaded rod 5. The two groups of sliders 6 drive the movable frame 7 to move linearly on the placement table 13. As the movable frame 7 moves, the surface of the placement table 13 is wiped clean. At the same time, start the fan 12 to accelerate the evaporation of moisture and help dry the surface of the placement table 13. When the cleaning cotton 8 completes the cleaning of the surface of the placement table 13, adjust the movable frame 7 back to the initial position (close to the end of the drive device) and prepare for the next use. Then, place the paper to be tested flatly on the placement table 13, start the ultrasonic probe 3, and emit ultrasonic pulses to the paper. The ultrasonic pulses penetrate the paper and are reflected on the back of the paper and return to the probe. The thickness of the paper is calculated by measuring the round-trip time of the ultrasonic wave. The data fed back by the ultrasonic probe 3 is recorded to obtain the thickness value of the paper.

[0026] In actual use, it is further convenient to drive the two groups of threaded rods 5 to rotate simultaneously. In this embodiment, the driving device includes a rotating shaft 14, a driven bevel gear 15, a driving bevel gear 16 and a driving motor 17. One end of the two groups of threaded rods 5 passes through the side wall of the fixed frame 4 and is equipped with the rotating shaft 14. The outer wall of the rotating shaft 14 is sleeved with the driven bevel gear 15, and one end of the driven bevel gear 15 is meshed with the driving bevel gear 16. The top wall of the detection platform 1 is equipped with the driving motor 17. The left and right output ends of the driving motor 17 are respectively connected to the two groups of driving bevel gears 16. When the driving motor 17 is started, the output shaft of the driving motor 17 starts to rotate. When the driving bevel gear 16 rotates, the two groups of driven bevel gears 15 meshed with it also start to rotate. Since the driven bevel gear 15 is fixed on the rotating shaft 14, the rotating shaft 14 will also rotate accordingly. The rotation of the rotating shaft 14 will drive the two groups of threaded rods 5 to rotate simultaneously.

[0027] During actual use, the drive device is further protected. In this embodiment, a protective shell 18 is installed on the outer wall of the drive device. The protective shell 18 can prevent the operator from accidentally contacting the moving parts of the drive device, reducing the risk of accidental injury. The protective shell 18 can also protect the drive device from external factors (such as dust, water vapor, corrosive substances, etc.), reduce wear and corrosion, and extend its service life.

[0028] During actual use, in order to further ensure that the paper is flat on the placement table 13, in this embodiment, a cylinder 19 is embedded in the top of the detector body 2, and a lower pressure plate 20 is installed at the output end of the cylinder 19. The lower pressure plate 20 is designed as a circular ring. When the pulp passes through the ultrasonic probe 3 for thickness detection, the cylinder 19 is first started, and the output end of the cylinder 19 drives the lower pressure plate 20 to descend until the paper is firmly fixed on the placement table 13. The circular ring design can evenly distribute pressure, ensure that the paper remains flat in the entire detection area, avoid warping or deformation of the paper, thereby improving the detection accuracy, and the circular ring design can also prevent the area detected by the ultrasonic probe 3 from being excessively squeezed, thereby ensuring the accuracy of the detection.

[0029] During actual use, the stability and accuracy of the operation of the drive motor 17 are further guaranteed. In this embodiment, the drive motor 17 is a servo motor. The servo motor can control the position, speed and torque with high precision. The servo motor adopts closed-loop control and has good stability. It can avoid problems such as stall and vibration, thereby ensuring the stability and accuracy of the operation of the drive motor 17.

[0030] During actual use, it is further convenient to install the detector body 2. In this embodiment, fixing plates 21 are installed on the left and right ends of the bottom of the detector body 2, and bolts 22 are threadedly installed on the fixing plates 21. By fixing with the bolts 22, the detector body 2 can be quickly installed on the testing table 1. The bolt 22 connection provides strong mechanical stability, ensuring that the detector body 2 will not easily loosen or fall off during use.

[0031] In actual use, it is further convenient to add water or cleaning liquid to the water tank 9. In this embodiment, a water inlet hopper 23 is installed at the top of the water tank 9. The water inlet hopper 23 makes it easier to add water or cleaning liquid to the water tank 9 without worrying about liquid overflow or splashing.

[0032] During actual use, in order to further prevent foreign matter from entering the water tank 9 through the water inlet hopper 23, in this embodiment, a sealing cover 24 is threadedly installed on the water inlet hopper 23. The sealing cover 24 can effectively prevent dust, impurities or other foreign matter from entering the water tank 9 through the water inlet hopper 23, keeping it clean.

[0033] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper thickness detector, comprising a detection platform (1), a detector body (2), an ultrasonic probe (3) and a cleaning device, characterized in that: The detector body (2) is installed at the rear end of the top wall of the detection platform (1), and the ultrasonic probe (3) is installed on the bottom wall of the detector body (2) at one end away from the installation point. The cleaning device is installed on the detection platform (1), and the cleaning device includes a fixed frame (4), a threaded rod (5), a driving device, a slider (6), a movable frame (7), a cleaning cotton (8), a water tank (9), a water guide pipe (10), a diversion pipe (11) and a fan (12). A placement platform (13) is installed at the top of the detection platform (1), and the left and right ends of the placement platform (13) are both installed with the fixed frame (4) with a side opening. The threaded rod (5) is rotatably mounted in the fixed frame (4), one end of the two groups of threaded rods (5) is mounted with the driving device, the slider (6) is threadedly mounted on the threaded rod (5), the two groups of sliders (6) are fixedly connected with the mobile frame (7), the top of the mobile frame (7) is mounted with the water tank (9), the bottom end of the water tank (9) is mounted with a water pipe (10), the bottom end of the water pipe (10) is connected with the diversion pipe (11), the outer wall of the diversion pipe (11) is mounted with the cleaning cotton (8), and the side wall of the mobile frame (7) is symmetrically mounted with two groups of fans (12).

2. The paper thickness detector according to claim 1, characterized in that: The driving device comprises a rotating shaft (14), a driven bevel gear (15), a driving bevel gear (16) and a driving motor (17); one end of the two groups of threaded rods (5) passes through the side wall of the fixed frame (4) and is respectively installed with the rotating shaft (14); the outer wall of the rotating shaft (14) is sleeved with the driven bevel gear (15); one end of the driven bevel gear (15) is meshedly connected with the driving bevel gear (16); the top wall of the detection platform (1) is installed with the driving motor (17); the left and right output ends of the driving motor (17) are respectively connected to the two groups of driving bevel gears (16).

3. The paper thickness detector according to claim 2, characterized in that: A protective shell (18) is installed on the outer wall of the driving device.

4. The paper thickness detector according to claim 3, characterized in that: A cylinder (19) is embedded in the top of the detector body (2), and a lower pressing plate (20) is installed at the output end of the cylinder (19), and the lower pressing plate (20) is designed as a circular ring.

5. The paper thickness detector according to claim 4, characterized in that: The driving motor (17) is a servo motor.

6. The paper thickness detector according to claim 5, characterized in that: Fixed plates (21) are installed at both left and right ends of the bottom of the detector body (2), and bolts (22) are threadedly installed on the fixed plates (21).

7. The paper thickness detector according to claim 6, characterized in that: A water inlet hopper (23) is installed at the top of the water tank (9).

8. The paper thickness detector according to claim 7, characterized in that: A sealing cover (24) is threadedly mounted on the water inlet hopper (23).

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