Centering device for license plate screen printing

Abstract

The present application provides a centering device for screen printing of license plates, comprising: a centering platform, which is arranged on a screen printing machine, and a screen printing area connected to the inside of the centering platform is arranged on the upper surface of the centering platform; a transmission component, which is used to transmit the license plate to the screen printing area, and is arranged on the screen printing machine through a first cylinder and can move vertically up and down along the centering platform; a limiting component, which includes a first position sensor and a second position sensor arranged on the centering platform, and a limiting unit and a vacuum unit arranged in the centering platform; the top of the limiting unit can penetrate the upper surface of the centering platform, and is used to limit the peripheral side of the license plate in the screen printing area; the vacuum unit is used to make the license plate in the screen printing area close to the screen printing area. The present application realizes the fixation of the license plate in the screen printing area, thereby improving the effect and yield rate of the screen printing of the license plate.

Description

Technical Field

[0001] The present application relates to the technical field of license plate screen printing, and in particular to a centering device for license plate screen printing. Background Art

[0002] Screen printing refers to using a silk screen as a base and making a screen printing plate with images through a photosensitive platemaking method. Screen printing consists of five major elements: screen printing plate, scraper, ink, printing table and substrate. Printing is based on the basic principle that the mesh holes of the image part of the screen printing plate can pass the ink, while the mesh holes of the non-image part cannot pass the ink. When printing, pour ink on one end of the screen printing plate, use a scraper to apply a certain pressure to the ink part on the screen printing plate, and move at a constant speed toward the other end of the screen printing plate. During the movement, the ink is squeezed from the mesh holes of the image part to the substrate by the scraper.

[0003] In the process of making license plates using screen printing technology, the license plates need to be placed manually in the screen printing tooling, and the placement of the license plates is mainly determined manually, which may cause the position of the license plates to deviate from the position of the printing plate, resulting in uneven printing of the license plates after screen printing, thereby reducing the effect of screen printing of the license plates and the yield rate. Utility Model Content

[0004] The present application provides a centering device for license plate screen printing, which is used to solve the technical problems described in the above background technology.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides a centering device for license plate screen printing, comprising:

[0007] A centering platform, wherein the centering platform is arranged on the screen printing machine, and a screen printing area connected to the interior of the centering platform is arranged on the upper surface of the centering platform;

[0008] A transmission component, used for transmitting the license plate into the screen printing area, and which is arranged on the screen printing machine through a first cylinder and can move vertically up and down along the centering platform;

[0009] A limit assembly, the limit assembly comprising a first position sensor and a second position sensor arranged on the centering platform, and a limit unit and a vacuum unit arranged in the centering platform; the top of the limit unit can penetrate the upper surface of the centering platform, and is used to limit the surrounding side of the license plate in the screen printing area; the vacuum unit is used to make the license plate in the screen printing area tightly attached to the screen printing area.

[0010] Optionally, the centering platform includes a mounting base and a shell;

[0011] The mounting base is arranged on the screen printing machine, the shell is arranged on the mounting base, and an accommodation space for accommodating the limiting unit and the vacuum unit is formed between the shell and the mounting base.

[0012] Optionally, there are two first cylinders, and the two first cylinders are respectively arranged on the mounting base on both sides of the length direction of the shell;

[0013] The transmission assembly includes a frame, a driving wheel and a driven wheel;

[0014] The frame is arranged on the telescopic end of the first cylinder and is parallel to the length direction of the mounting base, the driving wheel and the driven wheel are rotatably arranged on the frame close to the two ends of the frame respectively, one end of the driving wheel and one end of the driven wheel and the other end of the driving wheel and the other end of the driven wheel are respectively sleeved with belts, the shell is provided with a through groove for the two belts to move vertically up and down, and one end of the driving wheel is connected to the output shaft of the driving motor arranged on the frame.

[0015] Optionally, the housing is provided with a first through hole and a second through hole located on both sides of the length direction of the screen printing area, and a third through hole and a fourth through hole located on both sides of the width direction of the screen printing area outside the transmission component;

[0016] The limiting unit includes a plurality of second cylinders corresponding one by one to the first through hole, the second through hole, the third through hole and the fourth through hole respectively; the top ends of the plurality of second through holes are each provided with a limiting column and are each arranged in the accommodating space, so as to drive the top ends of the limiting columns on the telescopic ends thereof to extend out of or retract into the accommodating space.

[0017] Optionally, both the first through hole and the fourth through hole are bar-shaped through holes and are perpendicular to each other;

[0018] The housing is provided with a third cylinder, the telescopic end of the third cylinder is connected to the cylinder body of the second cylinder which can penetrate the first through hole, and is used to drive the corresponding second cylinder to move along the length direction of the first through hole;

[0019] A fourth cylinder is arranged on the outer wall of the shell, a connecting plate is arranged on the telescopic end of the fourth cylinder, a pull rod is arranged on the connecting plate, one end of the pull rod away from the connecting plate passes through and extends into the accommodating space and is connected to the cylinder body of the second cylinder that can pass through the fourth through hole, and the pull rod can move back and forth along the width direction of the shell.

[0020] Optionally, there are a plurality of the third through holes, and each of the third through holes corresponds to one of the second cylinders;

[0021] There are multiple fourth through holes, each of which corresponds to one of the second cylinders. The connecting plate is provided with multiple pull rods corresponding to the multiple fourth through holes one by one, and one end of each pull rod away from the connecting plate is connected to the cylinder body of the corresponding second cylinder.

[0022] Optionally, a guide cylinder corresponding to the pull rod is provided on the shell, and the pull rod is slidably connected to the guide cylinder.

[0023] Optionally, the first position sensor is arranged on the shell near the first through hole, and the second position sensor is arranged on the shell near the second through hole, and the first position sensor and the second position sensor are located on the same side in the length direction of the transmission component.

[0024] Optionally, an air suction hole communicating with the accommodating space is provided in the screen printing area;

[0025] The vacuum unit includes a vacuum pump, an air inlet pipe and an exhaust pipe;

[0026] One end of the air inlet pipe is connected to the air inlet of the vacuum pump, and the other end of the air inlet pipe is provided with a suction cup, and the suction cup is provided on the inner top surface of the accommodating space and covers the air suction hole. One end of the exhaust pipe is connected to the air outlet on the vacuum pump, and the other end of the exhaust pipe passes through and extends out of the accommodating space.

[0027] Optionally, a first limiting rod and a second limiting rod are respectively vertically arranged on both sides along the width direction of the end of the frame for the license plate to enter.

[0028] The centering device for screen printing of license plates provided in the present application transmits the license plate to the screen printing area on the screen printing machine through a transmission component, and then drives the transmission component to move downward through a first cylinder so that the top surface of the transmission component can be in the same horizontal plane with the top surface of the centering platform, and detects the position of the license plate through a first position sensor and a second position sensor, and limits the surrounding side of the license plate in the screen printing area in combination with a limit unit, so as to achieve precise positioning of the license plate in the screen printing area, so that the license plate in the screen printing area is opposite to the printing plate, and further under the action of the vacuum unit, the license plate in the screen printing area is tightly attached to the screen printing area, thereby fixing the license plate in the screen printing area, and printing the license plate through the printing plate opposite to the license plate, so that the printing uniformity of the license plate after screen printing is better, thereby improving the effect and yield of screen printing of the license plate. In addition, the present application replaces the operation of manually placing the license plate in the silk-screen printing area and manually judging the position of the license plate through the interaction of the transmission component, the first position sensor, the second position sensor, the limit unit and the vacuum unit, thereby improving the accuracy of the positioning of the license plate in the silk-screen printing area and the efficiency of silk-screen printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of a centering device for screen printing of a license plate provided in one embodiment of the present application;

[0031] Figure 2 A schematic structural diagram of a centering device for screen printing of a license plate provided in another embodiment of the present application;

[0032] Figure 3 An embodiment of the present application provides Figure 2 A schematic diagram of a local enlarged structure;

[0033] Figure 4 An embodiment of the present application provides Figure 2 Schematic diagram of the structure when viewed from above;

[0034] Figure 5 A schematic structural diagram of a vacuum unit provided in one embodiment of the present application.

[0035] In the figure: 100, centering platform; 101, screen printing area; 1011, air suction hole; 102, mounting base; 103, shell; 1031, through slot; 1032, first through hole; 1033, second through hole; 1034, third through hole; 1035, fourth through hole; 1036, third cylinder; 1037, fourth cylinder; 1038, guide cylinder; 200, transmission assembly; 201, frame; 2011, drive motor; 2012, first limit rod ; 2013, second limiting rod; 202, driving wheel; 2021, belt; 203, driven wheel; 300, first cylinder; 400, screen printing machine; 401, first position sensor; 402, second position sensor; 500, second cylinder; 501, limiting column; 600, vacuum unit; 601, vacuum pump; 602, air inlet pipe; 6021, suction cup; 603, exhaust pipe; 700, accommodating space; 800, connecting plate; 801, pull rod. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0037] refer to Figures 1 to 5 The present application provides a centering device for license plate screen printing, comprising:

[0038] The centering platform 100 is arranged on the screen printing machine 400, and a screen printing area 101 connected to the interior of the centering platform 100 is arranged on its upper surface; wherein, the screen printing area 101 is used to place the license plate (the license plate to be screen-printed) and its size can be set according to the size of the license plate, and the screen printing area 101 is directly opposite to the printing plate above, thus ensuring the accuracy of the screen printing and ensuring the effect of the screen printing of the license plate.

[0039] The transmission component 200 is used to transmit the license plate to the screen printing area 101. In addition, the transmission component 200 is set on the screen printing machine 400 through the first cylinder 300 and can move vertically up and down along the centering platform 100. The purpose of the first cylinder 300 is to drive the transmission component 200 to move vertically up and down on the centering platform 100, so that the top surface of the transmission component 200 can be in the same horizontal plane with the top surface of the centering platform 100, so that it is convenient for the printing plate above the screen printing to screen-print the license plate transmitted to the screen printing area 101 by the transmission component 200, thereby improving the effect of screen printing of the license plate.

[0040] The limiting assembly includes a first position sensor 401 and a second position sensor 402 arranged on the centering platform 100, and a limiting unit and a vacuum unit 600 arranged in the centering platform 100; the top of the limiting unit can penetrate the upper surface of the centering platform 100, and is used to limit the surrounding side of the license plate in the screen printing area 101; the vacuum unit 600 is used to make the license plate in the screen printing area 101 close to the screen printing area 101. Among them, the first position sensor 401 and the second position sensor 402 are both used to detect the position of the license plate transmitted to the screen printing area 101 by the transmission assembly 200, and the specific specifications and models of the two can be set according to actual needs.

[0041] The centering device for screen printing of license plates provided in the present application transmits the license plate to the screen printing area 101 on the screen printing machine 400 through the transmission component 200, and then drives the transmission component 200 to move downward through the first cylinder 300 so that the top surface of the transmission component 200 can be in the same horizontal plane as the top surface of the centering platform 100, and detects the position of the license plate through the first position sensor 401 and the second position sensor 402, and limits the surrounding side of the license plate in the screen printing area 101 in combination with the limiting unit, so as to achieve accurate positioning of the license plate in the screen printing area 101, so that the license plate in the screen printing area 101 is opposite to the printing plate, and further under the action of the vacuum unit 600, the license plate in the screen printing area 101 is tightly attached to the screen printing area 101, thereby fixing the license plate in the screen printing area 101, and printing the license plate through the printing plate opposite to the license plate, so that the printing uniformity of the license plate after screen printing is better, thereby improving the effect and yield of screen printing of the license plate. In addition, the present application replaces the operation of manually placing the license plate in the screen printing area 101 and manually judging the position of the license plate through the interaction of the transmission component 200, the first position sensor 401, the second position sensor 402, the limit unit and the vacuum unit 600, thereby improving the accuracy of the positioning of the license plate in the screen printing area 101 and the efficiency of screen printing.

[0042] In some embodiments, reference Figure 1 , Figure 2 and Figure 3The centering platform 100 in the present application includes a mounting base 102 and a shell 103; specifically, the mounting base 102 is arranged on the screen printing machine 400, and the shell 103 is arranged on the mounting base 102, and a receiving space 700 for receiving the limiting unit and the vacuum unit 600 is formed between the shell 103 and the mounting base 102. The receiving space 700 is provided to facilitate the storage of the limiting unit and the vacuum unit 600, so that before the transmission component 200 transports the license plate to the screen printing area 101, the top of the limiting unit does not extend out of the shell 103, so as to avoid the limiting unit blocking the transmission of the transmission component 200, thereby ensuring the continuity and stability of the transmission of the transmission component 200.

[0043] In some embodiments, reference Figure 2 There are two first cylinders 300 in the present application, and the two first cylinders 300 are respectively arranged on the mounting bases 102 on both sides of the length direction of the shell 103; wherein, the two first cylinders 300 not only play a supporting role for the transmission component 200, but also can drive the transmission component 200 to move vertically up and down in the height direction of the shell 103.

[0044] In addition, the transmission component 200 includes a frame 201, a driving wheel 202 and a driven wheel 203; specifically, the frame 201 is arranged on the telescopic end of the first cylinder 300 and is parallel to the length direction of the mounting base 102, the driving wheel 202 and the driven wheel 203 are respectively rotatably arranged on the frame 201 near the two ends of the frame 201, one end of the driving wheel 202 and one end of the driven wheel 203 and the other end of the driving wheel 202 and the other end of the driven wheel 203 are respectively provided with belts 2021, and the shell 103 is provided with a through groove 1031 for the two belts 2021 to move vertically up and down, and one end of the driving wheel 202 is connected to the output shaft of the driving motor 2011 arranged on the frame 201. Among them, the width of the through groove 1031 is greater than the width of the side of the frame 201 where the belt 2021 is provided, so that under the action of the first cylinder 300, the frame 201 and the belt 2021 thereon can freely extend below the top surface of the shell 103 or extend above the top surface of the shell 103.

[0045] In the above embodiment, the driving motor 2011 drives the driving wheel 202 rotatably connected to its output shaft to rotate, and the driving wheel 202 drives the driven wheel 203 connected to it via the belt 2021 to rotate during the rotation process, and then the license plate is transmitted to the screen printing area 101 via the belt 2021, thereby improving the efficiency of license plate transmission.

[0046] In some embodiments, reference Figure 2 and Figure 3The shell 103 in the present application is provided with a first through hole 1032 and a second through hole 1033 located on both sides of the length direction of the screen printing area 101, and a third through hole 1034 and a fourth through hole 1035 located on the outside of the transmission component 200 on both sides of the width direction of the screen printing area 101; that is, the first through hole 1032, the second through hole 1033, the third through hole 1034 and the fourth through hole 1035 are sequentially arranged around the screen printing area 101, so that the top of the limiting unit corresponding to the above-mentioned first through hole 1032, the second through hole 1033, the third through hole 1034 and the fourth through hole 1035 respectively extends from its corresponding through hole, so as to realize the limiting of the license plate in the screen printing area 101 by the limiting units located around the screen printing area 101, so that the license plate in the screen printing area 101 can be limited all around, thereby improving the stability of the license plate in the screen printing area 101.

[0047] In addition, the limiting unit includes a plurality of second cylinders 500 corresponding to the first through hole 1032, the second through hole 1033, the third through hole 1034 and the fourth through hole 1035 respectively; the tops of the plurality of second cylinders 500 are all provided with limiting posts 501 and are all arranged in the accommodation space 700, which are used to drive the tops of the limiting posts 501 on the telescopic ends thereof to extend out or retract into the accommodation space 700. The limiting posts 501 on the telescopic ends at the bottom thereof are driven by the second cylinders 500 to penetrate and extend out of the corresponding first through hole 1032 or the second through hole 1033 or the third through hole 1034 or the fourth through hole 1035, so as to realize the limiting of the license plate in the screen printing area 101 by the limiting posts 501, so that the license plate can face the printing plate, so that the license plate can be screen printed as fully as possible, so as to realize the accuracy and effect of the screen printing of the license plate. The second cylinders 500 are electrically connected to the first position sensor 401 and the second position sensor 402. In addition, the first through hole 1032, the second through hole 1033, the third through hole 1034 and the fourth through hole 1035 can be multiple respectively. Multiple first through holes 1032, multiple second through holes 1033, multiple third through holes 1034 and multiple fourth through holes 1035 can be used to fix license plates of different sizes, thereby improving the wide applicability of the centering device for screen printing of license plates.

[0048] In the above embodiment, when the transmission component 200 transports the license plate to the screen printing area 101, the second cylinder 500 corresponding to the second through hole 1033 and the third through hole 1034 respectively drives the limit column 501 on its telescopic end to extend out of the second through hole 1033 and the third through hole 1034. At this time, after the first position sensor 401 and the second position sensor 402 sense the position signal of the license plate, the first cylinder 300 drives the transmission component 200 to move vertically downward along the shell 103 until the top surface of the transmission component 200 is aligned with the shell 103. 03 are in the same horizontal plane, and at the same time, the second cylinder 500 corresponding to the first through hole 1032 and the fourth through hole 1035 drives the limiting column 501 on its telescopic end to extend out of the first through hole 1032 and the fourth through hole 1035, and at the same time, the vacuum unit 600 adsorbs the license plate on the top surface of the screen printing area 101, so that the license plate in the screen printing area 101 is tightly attached to the top surface of the screen printing area 101, thereby realizing automatic centering of the license plate and improving the centering and fixing efficiency of the license plate in the screen printing area 101.

[0049] In some embodiments, reference Figure 2 and Figure 3 The first through hole 1032 and the fourth through hole 1035 in the present application are both bar-shaped through holes and are perpendicular to each other; wherein, the first through hole 1032 and the fourth through hole 1035 can be used for the corresponding second cylinder 500 and the limiting column 501 on the telescopic end of the second cylinder 500 to move along the length direction of the first through hole 1032 or the fourth through hole 1035, thereby realizing the limiting of license plates of different sizes, thereby improving the wide applicability of the centering device for license plate screen printing.

[0050] In addition, a third cylinder 1036 is provided on the housing 103, and the telescopic end of the third cylinder 1036 is connected to the cylinder body of the second cylinder 500 that can penetrate the first through hole 1032, so as to drive the corresponding second cylinder 500 to move along the length direction of the first through hole 1032; wherein, the third cylinder 1036 provides the power for the second cylinder 500 to drive the limiting column 501 on its telescopic end to move along the length direction of the first through hole 1032. Specifically, the telescopic end of the third cylinder 1036 drives the second cylinder 500 and the limiting column 501 on the telescopic end of the second cylinder 500 to move along the length direction of the first through hole 1032, that is, the provision of the third cylinder 1036 enables the limiting column 501 on the telescopic end of the second cylinder 500 corresponding to the first through hole 1032 to fix a license plate with a larger length, thereby improving the wide applicability of the centering device in the present application.

[0051] Specifically, a fourth cylinder 1037 is provided on the outer wall of the housing 103, a connecting plate 800 is provided on the telescopic end of the fourth cylinder 1037, a pull rod 801 is provided on the connecting plate 800, an end of the pull rod 801 away from the connecting plate 800 penetrates and extends into the accommodating space 700 and is connected to the cylinder body of the second cylinder 500 that can penetrate the fourth through hole 1035, and the pull rod 801 can move back and forth along the width direction of the housing 103. The fourth cylinder 1037 provides the power for the second cylinder 500 to drive the limiting column 501 on its telescopic end to move along the length direction of the fourth through hole 1035. Specifically, the telescopic end of the fourth cylinder 1037 telescopically drives the connecting plate 800 fixedly connected to the telescopic end to move toward or away from the shell 103, and the movement of the connecting plate 800 drives the pull rod 801 fixedly connected to it to move into or out of the shell 103, and the movement of the pull rod 801 drives the second cylinder 500 arranged thereon and the limiting column 501 on the telescopic end of the second cylinder 500 to move along the length direction of the fourth through hole 1035, so that the limiting column 501 on the telescopic end of the second cylinder 500 corresponding to the fourth through hole 1035 can fix a license plate with a larger width, thereby improving the wide applicability of the centering device in the present application.

[0052] In some embodiments, reference Figure 2 , Figure 3 and Figure 4 In the present application, there are multiple third through holes 1034 (the third through holes 1034 with the same distance from the screen printing area 101 can be multiple (for example, two) to achieve stable limiting, and there can be multiple third through holes 1034 with different distances from the screen printing area 101 to achieve limiting of license plates of different sizes), and each third through hole 1034 corresponds to a second cylinder 500; wherein the third through hole 1034 is a circular hole, and the setting of multiple third through holes 1034 realizes the limiting of the license plate at the same time through the limiting column 501 on the telescopic end of the second cylinder 500 corresponding to the multiple third through holes 1034, thereby improving the stability of the limiting process of the license plate and the centering efficiency. In addition, a plurality of third through holes 1034 at equal distances from the screen printing area 101 may correspond to a second cylinder 500 , on which a fixing plate may be provided, on which two limiting columns 501 corresponding one to one with the third through holes 1034 at equal distances from the screen printing area 101 are provided.

[0053] There may be multiple fourth through holes 1035, each of which corresponds to a second cylinder 500, and the connecting plate 800 may also be provided with multiple pull rods 801 corresponding to the multiple fourth through holes 1035. One end of each pull rod 801 away from the connecting plate 800 is connected to the cylinder body of the second cylinder 500 corresponding to it, so that the same pull rod 801 can simultaneously drive the movement of multiple second cylinders 500. Among them, the setting of multiple fourth through holes 1035 realizes the simultaneous limitation of the license plate by the limiting column 501 on the telescopic end of the second cylinder 500 corresponding to the multiple fourth through holes 1035, thereby improving the stability of the limitation and the centering efficiency. Alternatively, multiple fourth through holes 1035 correspond to one second cylinder 500. In addition, multiple fourth through holes 1035 with equal distances from the screen printing area 101 may also correspond to one second cylinder 500. For example, every two fourth through holes 1035 at equal distances from the screen printing area 101 form a group, and a plurality of groups of fourth through holes 1035 at unequal distances from the screen printing area 101 can achieve centering of license plates of different sizes, thereby improving the wide applicability of the centering device for screen printing of license plates.

[0054] In the above embodiment, the number of the third through holes 1034 and the number of the fourth through holes 1035 can be set according to the length of the license plate to be centered as actually needed, in order to make the license plate fixed more stably. Therefore, this application does not make any specific limitations on this.

[0055] In some embodiments, reference Figure 2 and Figure 3 , the housing 103 in the present application is provided with a guide cylinder 1038 corresponding to the pull rod 801, and the pull rod 801 is slidably connected to the guide cylinder 1038. Among them, the guide cylinder 1038 plays a role in guiding the pull rod 801. Specifically, a slider can be provided on the pull rod 801 along its length direction, and a slide groove matching the slider can be provided on the inner wall of the guide cylinder 1038 along its length direction, so that the pull rod 801 and the guide cylinder 1038 can be slidably connected. The sliding connection between the pull rod 801 and the guide cylinder 1038 is not limited to the one described above, and can be set according to actual needs. The purpose is to reduce the friction of the pull rod 801 in the sliding process in the guide cylinder 1038 while fixing the pull rod 801 with the guide cylinder 1038.

[0056] In some embodiments, reference Figure 2 In the present application, the first position sensor 401 is arranged on the shell 103 near the first through hole 1032, and the second position sensor 402 is arranged on the shell 103 near the second through hole 1033. The first position sensor 401 and the second position sensor 402 are located on the same side of the length direction of the transmission component 200.

[0057] In the above embodiment, the first position sensor 401 detects the position of the front end of the license plate entering the screen printing area 101, and the second position sensor 402 detects the position of the rear end of the license plate entering the screen printing area 101, thereby improving the efficiency of license plate position detection, thereby ensuring the accuracy and efficiency of the centering of the license plate in the screen printing area 101.

[0058] In some embodiments, reference Figure 2 , Figure 3 and Figure 5 In the present application, the screen printing area 101 is provided with an air suction hole 1011 connected to the accommodating space 700; wherein, there may be a plurality of air suction holes 1011, so as to ensure the tightness of the contact between the bottom surface of the license plate and the top surface of the screen printing area 101 under the action of the vacuum unit 600.

[0059] In addition, the vacuum unit 600 includes a vacuum pump 601, an air inlet pipe 602 and an exhaust pipe 603; specifically, one end of the air inlet pipe 602 is connected to the air inlet of the vacuum pump 601, and the other end of the air inlet pipe 602 is provided with a suction cup 6021, and the suction cup 6021 is arranged on the inner top surface of the accommodating space 700 and covers the suction hole 1011, one end of the exhaust pipe 603 is connected to the air outlet of the vacuum pump 601, and the other end of the exhaust pipe 603 passes through and extends out of the accommodating space 700.

[0060] In the above embodiment, air is sucked by the vacuum pump 601 so that the air between the bottom surface of the license plate and the top surface of the screen-printed area 101 is discharged to the outside of the accommodating space 700 through the suction cup 6021, the air inlet pipe 602, the air inlet of the vacuum pump 601, the air outlet of the vacuum pump 601 and the exhaust pipe 603, so that the bottom surface of the license plate and the top surface of the screen-printed area 101 are in a vacuum state, so that the license plate is tightly attached to the top surface of the screen-printed area 101, thereby improving the fixing efficiency of the license plate in the screen-printed area 101 after centering and limiting.

[0061] In some embodiments, reference Figure 2 In the present application, a first limiting rod 2012 and a second limiting rod 2013 are respectively vertically arranged on both sides of the width direction of the frame 201 at one end for the license plate to enter. The first limiting rod 2012 and the second limiting rod 2013 are respectively away from the entrance of the transmission component 200.

[0062] In the above embodiment, when the license plate is transmitted through the transmission component 200, in the process of the license plate entering and being transmitted from the entrance of the transmission component 200, the license plate on the transmission component 200 is limited in turn by the first limiting rod 2012 and the second limiting rod 2013, which plays the role of limiting the license plate on the transmission component 200 and avoiding the deviation of the license plate on the transmission component 200 as much as possible.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A centering device for license plate screen printing, characterized in that: include: A centering platform (100), the centering platform (100) being arranged on the screen printing machine (400), and having an upper surface thereof provided with a screen printing area (101) communicating with the interior of the centering platform; A transmission component (200), the transmission component (200) is used to transmit the license plate to the screen printing area (101), and the transmission component (200) is arranged on the screen printing machine (400) through a first cylinder (300) and can move vertically up and down along the centering platform (100); A position limiting component, the position limiting component comprising a first position sensor (401) and a second position sensor (402) arranged on the centering platform (100), and a position limiting unit and a vacuum unit (600) arranged in the centering platform (100); the top of the position limiting unit can penetrate the upper surface of the centering platform (100) and is used to limit the surrounding side of the license plate in the screen printing area (101); the vacuum unit (600) is used to make the license plate in the screen printing area (101) tightly attached to the screen printing area (101).

2. The centering device for license plate screen printing according to claim 1, characterized in that: The centering platform (100) comprises a mounting base (102) and a housing (103); The mounting base (102) is arranged on the screen printing machine (400), the shell (103) is arranged on the mounting base (102), and an accommodation space for accommodating the limiting unit and the vacuum unit (600) is formed between the shell (103) and the mounting base (102).

3. The centering device for license plate screen printing according to claim 2, characterized in that: There are two first cylinders (300), and the two first cylinders (300) are respectively arranged on the mounting base (102) on both sides of the length direction of the shell (103); The transmission component (200) comprises a frame (201), a driving wheel (202) and a driven wheel (203); The frame (201) is arranged on the telescopic end of the first cylinder (300) and is parallel to the length direction of the mounting base (102); the driving wheel (202) and the driven wheel (203) are rotatably arranged on the frame (201) near the two ends of the frame (201), one end of the driving wheel (202) and one end of the driven wheel (203) and the other end of the driving wheel (202) and the other end of the driven wheel (203) are respectively sleeved with belts (2021); the housing (103) is provided with a through groove (1031) capable of allowing the two belts (2021) to move vertically up and down; one end of the driving wheel (202) is connected to the output shaft of a driving motor (2011) arranged on the frame (201).

4. The centering device for license plate screen printing according to claim 2, characterized in that: The housing (103) is provided with a first through hole (1032) and a second through hole (1033) located on both sides of the length direction of the screen printing area (101), and a third through hole (1034) and a fourth through hole (1035) located on the outside of the transmission component (200) on both sides of the width direction of the screen printing area (101); The limiting unit comprises a plurality of second cylinders (500) corresponding one-to-one to the first through hole (1032), the second through hole (1033), the third through hole (1034) and the fourth through hole (1035); the top ends of the plurality of second cylinders are all provided with limiting columns (501) and are all arranged in the accommodating space (700) for driving the top ends of the limiting columns (501) on the telescopic ends thereof to extend out of or retract into the accommodating space (700).

5. The centering device for license plate screen printing according to claim 4, characterized in that: The first through hole (1032) and the fourth through hole (1035) are both bar-shaped through holes and are perpendicular to each other; The housing (103) is provided with a third cylinder (1036), and the telescopic end of the third cylinder (1036) is connected to the cylinder body of the second cylinder (500) that can pass through the first through hole (1032), so as to drive the corresponding second cylinder (500) to move along the length direction of the first through hole (1032); A fourth cylinder (1037) is arranged on the outer wall of the shell (103), a connecting plate (800) is arranged on the telescopic end of the fourth cylinder (1037), a pull rod (801) is arranged on the connecting plate (800), and one end of the pull rod (801) away from the connecting plate (800) penetrates and extends into the accommodating space (700) to be connected to the cylinder body of the second cylinder (500) that can penetrate the fourth through hole (1035), and the pull rod (801) can move back and forth along the width direction of the shell (103).

6. The centering device for license plate screen printing according to claim 5, characterized in that: There are a plurality of the third through holes (1034), and each of the third through holes (1034) corresponds to one of the second cylinders (500); There are a plurality of the fourth through holes (1035), each of which corresponds to a second cylinder (500). The connecting plate (800) is provided with a plurality of pull rods (801) corresponding to the plurality of the fourth through holes (1035) one by one, and one end of each pull rod (801) away from the connecting plate (800) is connected to the cylinder body of the corresponding second cylinder (500).

7. The centering device for license plate screen printing according to claim 5 or 6, characterized in that: The housing (103) is provided with a guide cylinder (1038) corresponding to the pull rod (801), and the pull rod (801) is slidably connected to the guide cylinder (1038).

8. The centering device for license plate screen printing according to claim 4, characterized in that: The first position sensor (401) is arranged on the shell (103) near the first through hole (1032), and the second position sensor (402) is arranged on the shell (103) near the second through hole (1033). The first position sensor (401) and the second position sensor (402) are located on the same side of the length direction of the transmission component (200).

9. The centering device for license plate screen printing according to any one of claims 2 to 6, characterized in that: An air suction hole (1011) communicating with the accommodation space is provided in the screen printing area (101); The vacuum unit (600) comprises a vacuum pump (601), an air inlet pipe (602) and an air outlet pipe (603); One end of the air inlet pipe (602) is connected to the air inlet of the vacuum pump (601), and the other end of the air inlet pipe (602) is provided with a suction cup (6021), and the suction cup (6021) is provided on the inner top surface of the accommodating space (700) and covers the suction hole (1011). One end of the exhaust pipe (603) is connected to the air outlet on the vacuum pump (601), and the other end of the exhaust pipe (603) passes through and extends out of the accommodating space (700).

10. The centering device for license plate screen printing according to claim 3, characterized in that: A first limiting rod (2012) and a second limiting rod (2013) are respectively vertically arranged on both sides along the width direction of the end of the frame (201) for the license plate to enter.

Images