A printing device for warning sign posts

Abstract

The application discloses a printing device for warning sign piles and belongs to the technical field of screen printing. The first direction, the second direction and the up-down direction of the support are perpendicular to each other. The fixing assembly comprises a positioning shaft and a limiting support wheel which are arranged on the support in the first direction at intervals. The end of the positioning shaft close to the limiting support wheel is provided with a positioning part which can be sleeved with one end of the warning sign pile. The positioning shaft and the limiting support wheel can rotate relative to the support around the axis extending in the first direction. Two sets of limiting support wheels are arranged in the second direction at intervals and jointly define a support area which can support the other end of the warning sign pile. The printing screen plate is located above the fixing assembly and has a printing surface. The printing screen plate is slidably connected to the support and can move in the second direction. The squeegee is located above the printing surface and can abut against the printing surface to drive the printing surface into contact with the warning sign pile on the positioning shaft. The application can perform screen printing on the cylindrical warning sign pile, has high efficiency and makes the printed warning sign pile more durable and reliable.

Description

Technical Field

[0001] This invention belongs to the field of screen printing technology, and specifically relates to a printing device for warning sign posts. Background Technology

[0002] Warning sign posts, also known as marker posts, warning posts, or identification posts, serve a good warning function and are commonly used as directional markers for underground pipelines such as those for electricity, water supply, gas, communications, and railways, as well as for outdoor use, green belts, and pipeline routes. Warning sign posts come in many types and designs; among them, based on shape, they include square prisms and cylindrical shapes.

[0003] When manufacturing signage for prism-shaped warning posts, workers typically use screen printing technology to print on all four sides. However, for cylindrical warning posts, screen printing cannot be used on non-planar surfaces. Therefore, a sticker method is usually used, where the printed signage is affixed to the outer surface of the cylindrical warning post. However, this method is prone to problems such as inaccurate placement of the sticker, weak adhesion, low efficiency in sticker application, and the sticker peeling off easily when exposed to sunlight and rain. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a printing device for warning sign posts, which can perform screen printing on cylindrical warning sign posts, achieving excellent printing effects and quality, improving work efficiency, and making the printed warning sign posts more durable and reliable. This effectively solves the problem in the prior art where the film on cylindrical warning sign posts is prone to peeling off under sun and rain conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0006] This invention provides a printing device for warning sign posts, comprising:

[0007] The support has a first direction, a second direction, and a vertical direction that are perpendicular to each other;

[0008] The fixing assembly includes a positioning shaft and a limiting support wheel spaced apart from the bracket along a first direction. The positioning shaft has a positioning part at one end near the limiting support wheel for one end of the warning sign post to be fitted into. The positioning shaft and the limiting support wheel are rotatable relative to the bracket, and their rotation axes extend along the first direction. The limiting support wheel is provided in two sets and is spaced apart along a second direction, and together defines a support area for supporting the other end of the warning sign post.

[0009] A printing screen is located above the fixing assembly. The printing screen is slidably connected to the bracket and can move in a second direction. The printing screen has a printing surface.

[0010] A scraper, located above the printing surface, abuts against the printing surface to drive the printing surface into contact with the warning sign post on the positioning shaft.

[0011] The present invention has at least the following beneficial effects: The bracket is equipped with a fixing component for fixing the warning sign post. One end of the warning sign post is fitted into the positioning part on the positioning shaft, and the other end of the warning sign post is placed in the support area. Two sets of limiting support wheels apply a limiting and supporting effect to the warning sign post in the second direction. Moreover, the bracket is equipped with a printing screen and a scraper. After printing ink is poured onto the printing surface of the printing screen, the scraper moves from top to bottom and presses against the printing surface, so that the printing surface can contact the warning sign post on the positioning shaft. Then, during the process of applying force to the printing screen to drive it to move relative to the bracket in the second direction, the warning sign post rotates due to the friction between it and the printing surface, thereby screen printing on the outer circumference of the warning sign post to create the corresponding sign. This can complete the screen printing work of cylindrical warning sign posts, and the printing effect and quality are excellent, solving the problem that the sign film of existing cylindrical warning sign posts is prone to peeling off.

[0012] As a further improvement to the above technical solution, the printing screen is detachably connected to the support. This design facilitates the removal and replacement of the printing screen from the support, thereby enabling the printing of different messages on the warning sign posts.

[0013] As a further improvement to the above technical solution, the positioning part is cylindrical, the diameter of the positioning shaft is larger than the diameter of the positioning part, and an elastic pad is provided on the outer peripheral surface of the positioning part.

[0014] With this design, during the process of inserting the warning sign post into the positioning part, the end face of the positioning shaft near the positioning part can limit the position of the warning sign post. The positioning part is equipped with an elastic pad, which directly contacts the inner circumference of the warning sign post when it is inserted into the positioning part. The elastic deformation of the elastic pad effectively fills the gap between the warning sign post and the positioning part, enhancing the connection strength between the positioning part and the warning sign post. This avoids the problem of reduced screen printing effect caused by the warning sign post shaking relative to the positioning part during rotation.

[0015] As a further improvement to the above technical solution, a guide portion is provided at the end of the positioning part near the limiting support wheel. The guide portion is provided so that the warning sign post can be smoothly fitted into the positioning part.

[0016] As a further improvement to the above technical solution, the limiting support wheel is a swivel wheel.

[0017] As a further improvement to the above technical solution, the printing device for the warning sign post also includes a first linear drive assembly. The first linear drive assembly is mounted on the bracket, and its output end is connected to the printing screen to drive the printing screen to move along a second direction. With this configuration, when the first linear drive assembly is running, the printing screen can automatically move along the second direction to cooperate with the scraper for screen printing on the outer periphery of the warning sign post, eliminating the need for manual pulling of the printing screen, reducing the labor intensity of workers, and minimizing manpower input.

[0018] As a further improvement to the above technical solution, the printing device for the warning sign post also includes a second linear drive assembly and an elastic element. The second linear drive assembly is disposed on the bracket, and the elastic element can extend and retract in the vertical direction. The output end of the second linear drive assembly is connected to the upper end of the elastic element to drive the elastic element to move up and down. The lower end of the elastic element is connected to the upper part of the scraper.

[0019] With the above settings, the height position of the squeegee relative to the printing surface is adjusted by the second linear drive component. When printing is required, the squeegee moves downward under the driving action of the second linear drive component, and the elastic element makes the squeegee always press against the printing surface, thereby ensuring that the printing surface can contact the outer peripheral wall of the warning sign post under the action of the squeegee, so that the warning sign post can be printed with complete signage during rotation, thereby improving the product qualification rate.

[0020] As a further improvement to the above technical solution, the printing device for the warning sign post also includes a third linear drive assembly and a limiting sleeve. The limiting sleeve is disposed on the bracket and coaxially arranged with the positioning shaft. The inner diameter of the limiting sleeve is greater than or equal to the diameter of the positioning shaft. The third linear drive assembly is disposed on the bracket, and the output end of the third linear drive assembly is connected to the positioning shaft. The positioning shaft can rotate relative to the third linear drive assembly. The third linear drive assembly is used to drive the positioning shaft to move linearly away from the limiting support wheel, and to cause the limiting sleeve to push the warning sign post out of the positioning shaft. The bracket is provided with a discharge port, which is located below the fixing assembly.

[0021] With this setup, after printing is complete, the third linear drive assembly moves the positioning shaft along the first direction. At this time, the warning sign post moves along with the positioning shaft. Since the inner diameter of the limiting sleeve is greater than or equal to the diameter of the positioning shaft, and the diameter of the positioning shaft is smaller than the outer diameter of the warning sign post, the limiting sleeve will block and limit the end face of the warning sign post as the positioning shaft moves the warning sign post away from the limiting support wheel. Meanwhile, the positioning shaft continues to move under the action of the third linear drive assembly, thereby automatically detaching the warning sign post from the positioning shaft and allowing it to leave through the feeding port, so that subsequent warning signs can be printed with labels. No manual feeding is required, making it very intelligent and convenient.

[0022] As a further improvement to the above technical solution, the printing device for warning sign posts also includes a loading robot. The loading robot is located on the side of the limiting support wheel away from the positioning shaft, and is used to fit the warning sign post onto the positioning shaft. With this configuration, the loading robot can clamp the cylindrical warning sign post and move it along a first direction, fitting it onto the positioning shaft. Furthermore, the limiting support wheel provides limiting and support for the warning sign post, facilitating screen printing. This achieves automatic loading without manual operation, improving the intelligence level of the warning sign post printing device.

[0023] As a further improvement to the above technical solution, the printing device for warning sign posts also includes an automatic ink adding component. This component has a discharge pipe, the discharge port of which is located above the printing screen. This configuration allows the automatic ink adding component to replenish the printing surface of the printing screen without manual operation, reducing labor input and enhancing the intelligence level of the warning sign post printing device. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a three-dimensional structural view of the printing device for warning sign posts provided in an embodiment of the present invention;

[0026] Figure 2 This is a perspective view of the printing device for warning sign posts provided in an embodiment of the present invention after the warning sign post is fitted into the device;

[0027] Figure 3 This is a perspective view of the printing device for warning sign posts provided in another embodiment of the present invention;

[0028] Figure 4 This is a perspective view of the printing device for warning sign posts provided in another embodiment of the present invention after the warning sign post is fitted into the device;

[0029] Figure 5 This is a schematic diagram of the structure of the warning sign post in contact with the positioning shaft, the limiting sleeve and the warning sign post in the printing device of the warning sign post provided in another embodiment of the present invention.

[0030] The following labels are used in the attached diagram: 100, bracket; 110, feed port; 120, shaft hole; 210, positioning shaft; 211, elastic pad; 212, positioning part; 220, limiting support wheel; 300, printing screen; 310, printing surface; 400, scraper; 500, workpiece; 600, first linear drive assembly; 710, second linear drive assembly; 720, connecting plate; 730, guide post; 740, elastic element; 810, third linear drive assembly; 811, connecting part; 812, bearing; 820, limiting sleeve. Detailed Implementation

[0031] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0034] It should be noted that in the attached diagram, the X direction points from the rear to the front of the printing device on the warning sign post; the Y direction points from the left to the right of the printing device on the warning sign post; and the Z direction points from the bottom to the top of the printing device on the warning sign post.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 5 The following are several embodiments of the printing device for warning sign posts of the present invention.

[0037] like Figures 1 to 2 As shown, Embodiment 1 of the present invention provides a printing device for warning sign posts. This printing device can perform screen printing on cylindrical warning sign posts, with excellent printing effect and quality, and can improve work efficiency. Moreover, it can make the printed warning sign posts more durable and reliable, and effectively solves the problem in the prior art that cylindrical warning sign posts are prone to peeling off the sign film under sun and rain conditions.

[0038] The printing device for the warning sign post in this embodiment includes a support 100, a fixing component, a printing screen 300, and a scraper 400.

[0039] The bracket 100 has a vertical direction, a first direction, and a second direction, wherein the vertical direction is perpendicular to the first and second directions, and the first direction is perpendicular to the second direction. In this embodiment, the first direction is defined as the front-back direction, and the second direction is defined as the left-right direction. It can be understood that the function of the bracket 100 is to provide an installation position and support for the fixing components and the printing screen 300, and its specific structure and shape can be set according to the actual situation, and are not specifically limited here.

[0040] The fixing component includes a limiting support wheel 220 and a positioning shaft 210. The limiting support wheel 220 and the positioning shaft 210 are arranged at certain intervals along a first direction of the bracket 100, and both the limiting support wheel 220 and the positioning shaft 210 are mounted on the bracket 100. In this embodiment, the limiting support wheel 220 is located in front of the positioning shaft 210.

[0041] The positioning shaft 210 can be mounted on the bracket 100 via bearings. The positioning shaft 210 can rotate relative to the bracket 100, and the axis of rotation of the positioning shaft 210 extends along a first direction.

[0042] The positioning shaft 210 is provided with a positioning part 212, which is cylindrical. The positioning part 212 is used to insert one end of the cylindrical warning sign post. The positioning part 212 is located at the end of the positioning shaft 210 near the limiting support wheel 220. In this embodiment, the positioning part 212 is located on the front side of the positioning shaft 210 and is integrally formed with the positioning shaft 210. It can be made of metal such as iron or stainless steel. When the warning sign post is inserted into the positioning part 212, the outer peripheral surface of the positioning part 212 contacts the inner peripheral surface of the warning sign post, and the end face of the warning sign post contacts the front end face of the positioning shaft 210. The front end face of the positioning shaft 210 limits the warning sign post in a first direction.

[0043] The limiting support wheel 220 is rotatably mounted on the bracket 100. The limiting support wheel 220 can rotate relative to the bracket 100, and the rotation axis of the limiting support wheel 220 extends along the first direction.

[0044] In some embodiments, the limiting support wheel 220 is a swivel wheel.

[0045] There are two sets of limiting support wheels 220. The two sets of limiting support wheels 220 are arranged at certain intervals along the second direction of the bracket 100. The two sets of limiting support wheels 220 together define the support area, which can be used to support the other end of the warning sign post.

[0046] Understandably, one end of the warning sign post is fitted into the positioning shaft 210 for limiting and supporting functions, while the other end is placed in the supporting area, where two sets of limiting support wheels 220 provide limiting and supporting functions, allowing the central axis of the warning sign post to extend along the first direction, facilitating subsequent screen printing on the outer circumference of the warning sign post. Each set of limiting support wheels 220 can have one, two, or more. In this embodiment, each set of limiting support wheels 220 has one limiting support wheel 220.

[0047] The printing screen 300 is positioned above the fixed component and is slidably connected to the support 100. The printing screen 300 can move linearly relative to the support 100 along the second direction.

[0048] The printing screen 300 has a printing surface 310.

[0049] It is understood that a combination of guide rails and sliders, or drawer slides, can be provided between the printing screen 300 and the support 100; this is not specifically limited here. The lower side of the printing surface 310 is flush with the lower surface of the printing screen 300, and the upper side of the printing surface 310 is lower than the upper surface of the printing screen 300, so that printing ink can be poured onto the printing surface 310. In this embodiment, the printing screen 300 is made of metal, such as iron, and is rectangular in shape.

[0050] The scraper 400 extends along the first direction of the bracket 100 in the longitudinal direction. The scraper 400 is positioned above the printing surface 310. The scraper 400 can abut against the printing surface 310 on the printing screen 300. The scraper 400 applies force to the printing surface 310, causing the printing surface 310 to come into contact with the warning sign post sleeved on the positioning shaft 210.

[0051] When using the printing apparatus of this embodiment, the workpiece 500, such as a warning sign post, is fixed using the fixing components on the bracket 100. First, one end of the warning sign post is fitted into the positioning part 212 on the positioning shaft 210, and the other end of the warning sign post is placed in the support area. The two sets of limiting support wheels 220 apply a limiting and supporting effect to the warning sign post in the second direction, thereby positioning the warning sign post in the first, second, and third directions, so that the warning sign post can only rotate along its central axis, reducing the shaking of the warning sign post.

[0052] Then, the workpiece 500 is screen printed using the printing screen 300 and squeegee 400 on the support 100. After a certain amount of printing ink is poured onto the printing surface 310 of the printing screen 300, the operator can drive the squeegee 400 to move from top to bottom and press the squeegee 400 against the printing surface 310, so that the printing surface 310 can contact the upper surface of the warning sign post sleeved on the positioning shaft 210.

[0053] Next, the operator applies force to the printing screen 300, causing it to move relative to the support 100 in the second direction. During this movement, friction occurs between the warning post and the printing surface 310, causing the post to rotate. As the printing surface 310 moves in the second direction and the post rotates, screen printing can be performed on the outer surface of the warning post to create the corresponding signage. At this time, the squeegee 400 remains stationary relative to the support 100.

[0054] Understandably, looking in the front-to-back direction, if the printing screen 300 moves to the right, the warning sign post will rotate clockwise due to the action of the printing surface 310. When the warning sign post rotates, the positioning shaft 210 can rotate with it, or the positioning shaft 210 can remain fixed relative to the support 100 while the warning sign post rotates relative to the positioning shaft 210.

[0055] The printing device in this embodiment adopts the above-described structure, which can help workers complete the screen printing of cylindrical warning signs and produce a large number of products with the same sign. Moreover, the printing effect and quality of the products are excellent, and the position of the sign is accurate, which effectively solves the problem of the sign film peeling off easily in the prior art for cylindrical warning signs.

[0056] In some embodiments, the printing screen 300 and the support 100 are detachably connected. Specifically, the support 100 is provided with a slide rail extending in a second direction, and the printing screen 300 is provided with a sliding connector, such as a slider, that is slidably connected to the slide rail. This arrangement facilitates the removal of the printing screen 300 from the support 100 by workers and allows for the replacement of printing screens 300 with different labels, thereby enabling the printing of different labels on the warning sign posts.

[0057] In some embodiments, both the positioning shaft 210 and the positioning part 212 are cylindrical, and the positioning shaft 210 and the positioning part 212 are coaxially arranged.

[0058] The diameter of the positioning shaft 210 is larger than the diameter of the positioning part 212. An elastic pad 211 is provided on the outer peripheral surface of the positioning part 212. The elastic pad 211 can be made of sponge, silicone, rubber, etc., and is not specifically limited here. The outer diameter of the elastic pad 211 is smaller than the diameter of the positioning shaft 210.

[0059] It is understood that in some embodiments, the dimension of the elastic pad 211 in the first direction is less than or equal to the dimension of the positioning part 212 in the first direction. Of course, it is not excluded that the dimension of the elastic pad 211 in the first direction is greater than the dimension of the positioning part 212 in the first direction.

[0060] Understandably, during the process of inserting the warning sign post into the positioning part 212, the end face of the positioning shaft 210 near the positioning part 212 can limit the position of the warning sign post. Furthermore, the positioning part 212 is provided with an elastic pad 211. When the warning sign post is inserted into the positioning part 212, the elastic pad 211 is in direct contact with the inner circumferential surface of the warning sign post. At this time, the elastic deformation performance of the elastic pad 211 can be used to effectively fill the gap between the warning sign post and the positioning part 212, enhance the connection strength between the positioning part 212 and the warning sign post, and fix the warning sign post to the positioning part 212. This avoids the problem of reduced screen printing effect caused by the warning sign post shaking relative to the positioning part 212 during rotation.

[0061] Furthermore, the positioning part 212 is provided with a guide part, which is located at one end of the positioning part 212 near the limiting support wheel 220. In this embodiment, the front end of the positioning part 212 is provided with a chamfer, which serves as the guide part, so that the warning sign post can be smoothly fitted into the positioning part 212. Of course, when an elastic pad 211 is provided, the front end of the elastic pad 211 can also be provided with a guide part, and the dimension of the elastic pad 211 in the first direction is smaller than the dimension of the positioning part 212 in the first direction.

[0062] Of course, a transmission structure can also be provided between the positioning shaft 210 and the printing screen 300. The transmission structure can include a rack and a gear that mesh with each other. The gear is fixedly connected to the positioning shaft 210 and is coaxially arranged. The rack is fixedly connected to the printing screen 300, and the length direction of the rack is consistent with the movement direction of the printing screen 300. Then, when the printing screen 300 moves linearly, the rack moves along with the printing screen 300. At the same time, the rack drives the gear to rotate, causing the positioning shaft 210 to rotate along with the warning sign post.

[0063] In some embodiments, such as Figure 3 and Figure 4 As shown, the printing device for the warning sign post also includes a first linear drive assembly 600.

[0064] The first linear drive assembly 600 is mounted on the bracket 100. The output end of the first linear drive assembly 600 is connected to the printing screen 300. When the first linear drive assembly 600 is working, it can drive the printing screen 300 to move linearly along the second direction of the bracket 100.

[0065] Specifically, the printing screen 300 is symmetrically provided with first linear drive assemblies 600 on its front and rear sides. The first linear drive assembly 600 can be a linear drive device such as a pneumatic cylinder, electric cylinder, or hydraulic cylinder, and is not specifically limited here. In this embodiment, the first linear drive assembly 600 is a pneumatic cylinder, which is bolted to the bracket 100. The moving rod of the cylinder is fixedly connected to the right side of the printing screen 300 via a connecting block. Of course, the connection between the connecting block and the printing screen 300 can be detachable, for example, by bolts, so that the printing screen 300 can be removed from the bracket 100 and replaced.

[0066] Understandably, when the first linear drive assembly 600 is activated, the printing screen 300 can automatically move along the second direction of the support 100. At this time, the staff only needs to operate the scraper 400, without manually pulling the printing screen 300. Therefore, the printing screen 300 can work with the scraper 400 to screen print on the outer surface of the warning sign post, which can reduce the labor intensity of the staff and reduce manpower input, thereby helping to reduce the company's costs.

[0067] Based on the above embodiments, such as Figure 3 and Figure 4 As shown, the printing device for the warning sign post also includes an elastic element 740 and a second linear drive assembly 710.

[0068] The second linear drive assembly 710 is mounted on the bracket 100. The elastic element 740 is capable of extending and retracting along the vertical direction of the bracket 100. The output end of the second linear drive assembly 710 is fixedly connected to the upper end of the elastic element 740, and the lower end of the elastic element 740 is fixedly connected to the upper part of the scraper 400. When the second linear drive assembly 710 is working, it can drive the elastic element 740 and the scraper 400 to move together along the vertical direction of the bracket 100.

[0069] In this embodiment, the second linear drive assembly 710 is a cylinder and is bolted to the bracket 100. The second linear drive assembly 710 is located above the scraper 400. The output end of the second linear drive assembly 710 is provided with a connecting plate 720, which extends along a first direction. The elastic element 740 is a spring, the upper end of which can be welded to the lower surface of the connecting plate 720, and the lower end of which can be welded to the upper surface of the scraper 400.

[0070] Furthermore, the connecting plate 720 is provided with a guide hole, and the upper surface of the scraper 400 is provided with a guide post 730. The guide post 730 can be inserted into the guide hole and contact the inner circumferential surface of the guide hole. A spring can be fitted onto the guide post 730. The provision of the guide post 730 allows the scraper 400 to move up and down smoothly.

[0071] It is understood that when using the printing device for warning sign posts in this embodiment, the height position of the squeegee 400 relative to the printing surface 310 can be adjusted using the second linear drive component 710. When printing is required, the squeegee 400 moves downward a certain distance under the driving action of the second linear drive component 710, and the elastic force of the elastic member 740 ensures that the squeegee 400 is always pressed against the printing surface 310. At this time, the elastic member 740 is in a compressed state, thereby ensuring that the printing surface 310 can contact the outer peripheral wall of the warning sign post under the action of the squeegee 400, so that the warning sign post can be printed with complete signage during rotation, thereby improving the product qualification rate. With this setting, there is no need for manual operation of the squeegee 400; the staff only needs to load and unload the warning sign posts, reducing workload.

[0072] Based on the above embodiments, the printing device for warning sign posts also includes a limit sleeve 820 and a third linear drive assembly 810.

[0073] The limiting sleeve 820 is mounted on the bracket 100 and fixed relative to the bracket 100. Viewed along the first direction, the limiting sleeve 820 is annular in shape. The limiting sleeve 820 is coaxially arranged with the positioning shaft 210, that is, the central axis of the limiting sleeve 820 and the central axis of the positioning shaft 210 both extend along the first direction and coincide with each other. The inner diameter of the limiting sleeve 820 can be larger than or equal to the diameter of the positioning shaft 210.

[0074] The third linear drive assembly 810 is mounted on the bracket 100 and is located on the side of the positioning shaft 210 away from the positioning part 212. The output end of the third linear drive assembly 810 is connected to the rear end of the positioning shaft 210. When the third linear drive assembly 810 is working, it can drive the positioning shaft 210 to move linearly away from the limit support wheel 220, and cause the limit sleeve 820 to be pushed out of the positioning shaft 210 via the warning sign post. Moreover, the positioning shaft 210 and the output end of the third linear drive assembly 810 are rotatably connected, allowing the positioning shaft 210 to rotate relative to the third linear drive assembly 810 around its own central axis.

[0075] The bracket 100 is provided with a shaft hole 120 so that the positioning shaft 210 can move along the first direction and pass through the shaft hole 120 of the bracket 100. Furthermore, the bracket 100 is provided with a discharge port 110, which is located below the fixing component, and a collecting frame can be provided below the discharge port 110. In some embodiments, the outer peripheral surface of the positioning shaft 210 contacts the inner peripheral surface of the shaft hole 120, and the shaft hole 120 can restrict the positioning shaft 210, allowing the positioning shaft 210 to move smoothly in the first direction.

[0076] In this embodiment, as Figure 5 As shown, the third linear drive assembly 810 is a cylinder. The cylinder's movable rod is provided with a connector 811. The shape and size of the connector 811 are not limited. The front side of the connector 811 is provided with a mounting groove, and a bearing 812 is provided in the mounting groove. The rear end face of the positioning shaft 210 protrudes rearward to form a connecting part. The connecting part can be inserted into the inner ring of the bearing 812. Therefore, the positioning shaft 210 can rotate relative to the third linear drive assembly 810 around its own central axis and can move back and forth under the driving action of the third linear drive assembly 810.

[0077] like Figures 3 to 5 As shown, after the warning sign post has finished printing the sign, the staff can use the third linear drive component 810 to automatically drive the positioning shaft 210 to move backward. At this time, the warning sign post will move along with the positioning shaft 210 due to the action of the elastic pad 211.

[0078] Since the inner diameter of the limiting sleeve 820 is greater than or equal to the diameter of the positioning shaft 210, and the diameter of the positioning shaft 210 is smaller than the outer diameter of the warning sign post, the limiting sleeve 820 will block and limit the end face of the warning sign post as the positioning shaft 210 moves the warning sign post away from the limiting support wheel 220. Meanwhile, the positioning shaft 210 continues to move backward under the driving action of the third linear drive assembly 810, thereby automatically detaching the warning sign post from the positioning shaft 210.

[0079] At this time, one end of the warning sign post separates from the positioning part 212, and the other end of the warning sign post separates from the limiting support wheel 220 due to the backward movement, causing the warning sign post to lose its support function and fall into the collection frame through the discharge port 110 under the action of gravity, thereby causing the warning sign post to leave the working area of ​​the printing device of the warning sign post, so that the subsequent warning sign post can be put on the positioning shaft 210 and the labeling message can be printed.

[0080] This setup eliminates the need for manual material feeding; staff only need to load the materials, making the printing device for warning signs more intelligent and easier to use.

[0081] Based on the above embodiments, the printing device for warning sign posts also includes a loading robot (not shown in the figure). The loading robot is located on the side of the limiting support wheel 220 away from the positioning shaft 210, and its function is to fit the warning sign post into the positioning shaft 210.

[0082] Understandably, the loading robot can consist of a robotic arm and a pneumatic gripper. The pneumatic gripper can hold the warning sign post, and the robotic arm can adjust the position of the pneumatic gripper so that the warning sign post can move along the first direction and be fitted onto the positioning shaft 210. Of course, it is not ruled out that the loading robot may use other structures.

[0083] When using the printing device for warning sign posts in this embodiment, the operator can use a feeding robot to clamp the cylindrical warning sign post and move it along the first direction and fit it onto the positioning shaft 210. Moreover, the warning sign post can be limited and supported by the limiting support wheel 220 so as to perform screen printing, thereby realizing automatic feeding without manual operation and improving the intelligence level of the printing device for warning sign posts.

[0084] The printing device for warning sign posts adopts the above-mentioned structural configuration, which allows the loading and unloading of warning sign posts to be carried out separately, eliminating the need for a loading robot to complete the loading and unloading work, thereby improving printing efficiency.

[0085] Of course, the loading robot can also be used in conjunction with a conveyor line or loading rack, allowing it to stably grip the warning sign post from the conveyor line or loading rack and move it towards the printing device. Additionally, sensors can be installed on the bracket 100 to detect whether the warning sign post is on the fixed assembly. If the warning sign post is on the fixed assembly, the first linear drive assembly 600, the second linear drive assembly 710, and the third linear drive assembly 810 are controlled to operate sequentially, achieving automated control of the warning sign post's label printing process. After the warning sign post is unloaded from the fixed assembly, the loading robot is controlled to perform the loading operation.

[0086] Based on the above embodiments, the printing device for warning sign posts further includes an automatic ink adding component. This automatic ink adding component is equipped with a discharge pipe, which may have several discharge ports located above the printing screen 300. The discharge pipe is equipped with a control valve.

[0087] It is understood that the automatic ink dispensing component can consist of an ink container, a delivery pump, and a discharge pipe. When using the printing apparatus for warning sign posts in this embodiment, the automatic ink dispensing component replenishes the printing surface 310 on the printing screen 300 with printing ink, eliminating the need for manual operation, reducing labor input, and improving the intelligence level of the warning sign post printing apparatus.

[0088] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A printing apparatus for warning signs, characterized by, The application relates to a warning sign post printing device. The device comprises a support, a fixing assembly, a printing screen, a scraper, a first linear drive assembly, a second linear drive assembly, an elastic member, a limiting sleeve, a third linear drive assembly, an upper feeding mechanical arm and an ink automatic adding assembly. The support has a first direction, a second direction and an up-down direction which are perpendicular to each other. The fixing assembly comprises a positioning shaft and a limiting support wheel which are arranged on the support and are spaced apart along the first direction. An end of the positioning shaft close to the limiting support wheel is provided with a positioning part for sleeing one end of the warning sign post. The positioning shaft and the limiting support wheel can rotate relative to the support, and the rotating axes of the positioning shaft and the limiting support wheel extend along the first direction. The limiting support wheel is provided with two groups of limiting support wheels which are arranged along the second direction and jointly define a supporting area for supporting the other end of the warning sign post. The positioning shaft and the positioning part are coaxially arranged, the diameter of the positioning shaft is larger than that of the positioning part, and the outer circumferential surface of the positioning part is provided with an elastic pad. The printing screen is arranged above the fixing assembly, is slidably connected to the support and can move along the second direction. The printing screen has a printing surface. The scraper is arranged above the printing surface and can abut against the printing surface to drive the printing surface to contact the warning sign post on the positioning shaft. The first linear drive assembly is arranged on the support, the output end of the first linear drive assembly is connected to the printing screen to drive the printing screen to move along the second direction.

2. The printing apparatus of claim 1, wherein The second linear drive assembly is arranged on the support.

3. The apparatus of claim 1, wherein The elastic member can extend and contract along the up-down direction, the output end of the second linear drive assembly is connected to the upper end of the elastic member to drive the elastic member to move up and down, and the lower end of the elastic member is connected to the upper part of the scraper. The limiting sleeve is arranged on the support and is coaxially arranged with the positioning shaft. The third linear drive assembly is arranged on the support, the output end of the third linear drive assembly is connected to the positioning shaft, and the positioning shaft can rotate relative to the third linear drive assembly. The third linear drive assembly is used for driving the positioning shaft to linearly move away from the limiting support wheel and driving the limiting sleeve to eject the warning sign post from the positioning shaft. The support is provided with a discharging port which is arranged below the fixing assembly. A collecting frame is arranged below the discharging port. The upper feeding mechanical arm is arranged on the side of the limiting support wheel away from the positioning shaft to sleeve the warning sign post into the positioning shaft. The ink automatic adding assembly is provided with a discharging pipe, and the discharging port of the discharging pipe is arranged above the printing screen. The positioning part is provided with a guide part close to the end of the limiting support wheel. The limiting support wheel is a universal wheel.

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