Automatic screening device for traffic sign inspection

Abstract

The present application relates to a kind of automatic screening device for traffic signboard inspection, it is related to the production inspection field of traffic signboard, including base, feeding clamping assembly and inspection screening assembly.Base includes the load cell with predetermined work size and support force;With the support unit connected to the load cell.Feeding clamping assembly includes the adjustment unit with predetermined work distance between the load cell;With the clamping unit connected to the adjustment unit.Inspection screening assembly includes multiple test units and defective product recovery unit placed on the work surface of the load cell.The present application can alternately carry out the inspection operation of traffic signboard by the cooperation of the feeding clamping assembly and the inspection screening assembly, and can effectively improve the inspection efficiency of traffic signboard.Meanwhile, the clamping unit can be flexibly adjusted, and can be suitable for traffic signboard of various sizes, and is more widely applicable.The defective product recovery unit can classify and recycle defective products, which is convenient for subsequent reprocessing of defective products.

Description

Technical Field

[0001] This invention relates to the field of production and inspection of traffic signs, and specifically to an automatic screening device for inspecting traffic signs. Background Technology

[0002] Traffic signs, also known as road traffic signs, are graphic symbols that display traffic regulations and road information. They provide a vivid, concrete, and concise expression of traffic laws, while also conveying information that is difficult to describe in words. These facilities are used to manage traffic, indicate driving directions, and ensure smooth traffic flow and road safety. Applicable to highways, urban roads, and all special-purpose roads, they have the force of law, and vehicles and pedestrians must comply with them. During the production and processing of traffic signs, appropriate inspections are required before they leave the factory to ensure their quality.

[0003] Traditional traffic sign inspection devices typically rely on manual inspection or require inspecting each sign one by one in a queue, resulting in slow inspection speed and low efficiency. Furthermore, the varying sizes of traffic signs limit the applicability of traditional inspection devices. Summary of the Invention

[0004] Purpose of the invention: To provide an automatic screening device for inspecting traffic signs, so as to solve the above-mentioned problems existing in the prior art.

[0005] Technical solution: An automatic screening device for traffic sign inspection, comprising three components: a base, a feeding clamping assembly, and an inspection screening assembly.

[0006] The base includes a bearing unit with a predetermined working size and supporting force; and a support unit connected to the bearing unit, having a predetermined working height and supporting force.

[0007] The feeding clamping assembly includes an adjustment unit that has a predetermined working distance from the carrying unit and has a predetermined support force and working height; and a clamping unit connected to the adjustment unit that has a predetermined working length and support force.

[0008] The inspection and screening assembly includes multiple inspection units placed on the working surface of the supporting unit; and a defective product recycling unit placed on the working surface of the supporting unit, with a predetermined working distance between it and the multiple inspection units.

[0009] In a further embodiment, the supporting unit comprises two components: a supporting frame and a supporting plate. The supporting frame has a predetermined working size and supporting force, and can perform corresponding supporting and limiting operations. The supporting plate is connected to the supporting frame, has a predetermined working area and supporting force, and can perform corresponding bearing and limiting operations.

[0010] In a further embodiment, the support unit comprises two components: a support column and a support plate. One end of the support column is connected to the support frame, and it has a predetermined working length and supporting force, enabling corresponding support and connection operations. The support plate is connected to the support column, has a predetermined working area and supporting force, and enables corresponding support and limiting operations. Multiple support columns and support plates are arranged in an array on the working surface of the support frame.

[0011] In a further embodiment, the adjustment unit comprises three components: an adjustment positioning column, an adjustment platform, and an extension adjustment assembly. The adjustment positioning column has a predetermined working distance from the bearing unit, and possesses predetermined working dimensions and supporting force, enabling corresponding bearing and positioning operations. The adjustment platform is connected to the adjustment positioning column, has predetermined working dimensions and supporting force, and can perform corresponding bearing and limiting operations. The extension adjustment assembly is movably connected to the adjustment platform, has predetermined working length and supporting force, and can perform adjustable operations within a predetermined range.

[0012] In a further embodiment, the extension adjustment assembly comprises three components: a rotating platform, a vertical extension arm, and a horizontal extension arm. The rotating platform is rotatably connected to the adjustment platform, has a predetermined working size and load-bearing capacity, and can perform rotational adjustment operations within a predetermined range. The vertical extension arm is rotatably connected to the rotating platform, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range. The horizontal extension arm is rotatably connected to the vertical extension arm, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range.

[0013] In a further embodiment, the clamping unit comprises three components: a double-layer sliding rail, a shaped sliding block, and a rotating clamping plate. The double-layer sliding rail is connected to the extension adjustment assembly, has a predetermined working length and supporting force, and is a double-layer structure capable of performing corresponding load-bearing and limiting operations. The shaped sliding block is slidably connected to the double-layer sliding rail, fully covering the working surface of the double-layer sliding rail, and the working surface of the shaped sliding block is provided with a cross groove, allowing for sliding adjustment operations within a predetermined range along the working surface of the double-layer sliding rail. The rotating clamping plate is placed within the cross groove of the shaped sliding block and is slidably connected to the shaped sliding block, allowing for corresponding sliding adjustment operations along the provided cross groove.

[0014] In a further embodiment, there are multiple irregularly shaped sliding blocks and multiple rotating clamping plates, all of which can be slidably adjusted within a predetermined range along the working surface of the double-layer sliding rail. The short ends of the cross groove provided in the irregularly shaped sliding block are open, and the rotating clamping plate can slide out along the open end of the cross groove.

[0015] In a further embodiment, the multi-inspection unit comprises two components: a character inspection group and a reflective inspection group. The character inspection group includes a character positioning post placed on the working surface of the support unit; a character adjustment post slidably connected to the character positioning post; and a character infrared scanning tube connected to the character adjustment post and capable of adjusting its working position according to the sliding adjustment of the character adjustment post. The reflective inspection group includes a reflective positioning post placed on the working surface of the support unit; a reflective adjustment post slidably connected to the reflective positioning post; and a reflective inspection lamp connected to the reflective adjustment post and capable of adjusting its working position according to the sliding adjustment of the reflective adjustment post. A predetermined working distance is maintained between the character inspection group and the reflective inspection group.

[0016] In a further embodiment, the defective product recycling unit comprises two components: a positioning platform and sorting recycling bins. The positioning platform is placed on the working surface of the supporting unit, has predetermined working dimensions and supporting force, and can perform corresponding carrying and positioning operations. Multiple sorting recycling bins are symmetrically distributed at the front and rear ends of the positioning platform in the working direction; each sorting recycling bin has predetermined containment capacity and is open at one end. The working surface of the positioning platform is provided with pushing units; multiple pushing units are symmetrically distributed on the working surface of the positioning platform, and their working positions correspond to the working positions of the sorting recycling bins. Each pushing unit includes a telescopic column and a pushing plate; the telescopic column is placed on the working surface of the positioning platform, has predetermined telescopicity, and can perform telescopic adjustment operations within a predetermined range; the pushing plate is connected to the telescopic column and can adjust its working position accordingly by following the telescopic column's telescopic adjustment.

[0017] Beneficial Effects: This invention relates to an automatic screening device for inspecting traffic signs, specifically in the field of traffic sign production and inspection. The device includes a base, a feeding clamping assembly, and an inspection screening assembly. The base includes a support unit with a predetermined working size and supporting force; and a support unit connected to the support unit, having a predetermined working height and supporting force. The feeding clamping assembly includes an adjustment unit with a predetermined supporting force and working height, spaced at a predetermined working distance from the support unit; and a clamping unit connected to the adjustment unit, having a predetermined working length and supporting force. The inspection screening assembly includes multiple inspection units placed on the working surface of the support unit; and a defective product recovery unit placed on the working surface of the support unit, spaced at a predetermined working distance from the multiple inspection units. This invention allows for alternating inspection of traffic signs through the cooperation of the feeding clamping assembly and the inspection screening assembly, effectively improving the inspection efficiency of traffic signs. Furthermore, the clamping units are flexibly adjustable, making it suitable for traffic signs of various sizes and thus more widely applicable. Furthermore, the defective product recycling unit can classify and recycle defective products, facilitating their subsequent reprocessing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the entire invention.

[0019] Figure 2 This is a schematic diagram of the feeding clamping assembly described in this invention.

[0020] Figure 3 This is a schematic diagram of the clamping unit described in this invention.

[0021] Figure 4 This is a schematic diagram of the multiple verification unit described in this invention.

[0022] Figure 5 This is a schematic diagram of the defective product recycling unit described in this invention.

[0023] The attached figures are labeled as follows: 1. Support frame; 2. Support plate; 3. Loading transport plate; 4. Unloading transport plate; 5. Support column; 6. Loading clamping assembly; 7. Adjusting positioning column; 701. Adjusting table; 702. Rotating table; 703. Vertical extension arm; 704. Horizontal extension arm; 705. Double-layer sliding rail; 706. Irregular sliding block; 707. Rotating clamping plate; 708. Character inspection group; 8. Character positioning column; 801. Character adjusting column; 802. Character infrared scanning tube; 803. Reflective inspection group; 9. Reflective positioning column; 901. Reflective adjusting column; 902. Reflective inspection lamp tube; 903. Defective product recycling unit; 10. Positioning table; 101. Classification recycling bin; 102. Telescopic column; 103. Push plate; 104. Detailed Implementation

[0024] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0025] The applicant argues that traditional traffic sign inspection devices typically involve manual inspection or queuing up and inspecting each sign individually, resulting in slow speed and low efficiency. Furthermore, the varying sizes of traffic signs limit the applicability of traditional inspection devices.

[0026] To address this issue, the applicant designed an automatic screening device for inspecting traffic signs. The device, through the coordination of the feeding clamping assembly 7 and the inspection screening assembly, allows for alternating inspection of traffic signs, effectively improving inspection efficiency. Furthermore, the clamping unit is flexibly adjustable to accommodate traffic signs of various sizes, thus broadening its applicability. The included defective product recycling unit 10 can classify and recycle defective products, facilitating subsequent reprocessing.

[0027] The automatic screening device for inspecting traffic signs involved in this invention mainly comprises three parts: a base, a feeding clamping assembly 7, and an inspection screening assembly. The base includes a support unit with a predetermined working size and supporting force; and a support unit connected to the support unit, having a predetermined working height and supporting force. The feeding clamping assembly 7 includes an adjustment unit with a predetermined supporting force and working height, maintaining a predetermined working distance from the support unit; and a clamping unit connected to the adjustment unit, having a predetermined working length and supporting force. The inspection screening assembly includes multiple inspection units placed on the working surface of the support unit; and a defective product recovery unit 10 placed on the working surface of the support unit, maintaining a predetermined working distance from the multiple inspection units. During subsequent operations, the clamping units can be used to limit and clamp the traffic signs to be inspected, and then the multiple inspection units can be used to perform the corresponding inspection operations. When defective products are detected, they are recovered by the defective product recovery unit 10. In a further preferred embodiment, the left and right ends of the carrying unit in the working direction are respectively provided with a loading transport plate 3 and a unloading transport plate 4, which can carry out corresponding loading and unloading operations.

[0028] The supporting unit comprises two components: a support frame 1 and a support plate 2. The support frame 1 has a predetermined working size and supporting force, and can perform corresponding supporting and limiting operations. The support plate 2 is connected to the support frame 1, has a predetermined working area and supporting force, and can perform corresponding bearing and limiting operations.

[0029] The support unit comprises two components: a support column 5 and a support plate 6. One end of the support column 5 is connected to the support frame 1, and it has a predetermined working length and supporting force, enabling corresponding support and connection operations. The support plate 6 is connected to the support column 5, and it has a predetermined working area and supporting force, enabling corresponding support and limiting operations. Multiple support columns 5 and support plates 6 are arranged in an array on the working surface of the support frame 1. In a further preferred embodiment, each support column 5 and support plate 6 forms a group. This application provides four groups of support column 5 and support plate 6 combinations, respectively placed at the four corners of the support frame 1, enabling corresponding support operations.

[0030] The adjustment unit comprises three components: an adjustment positioning column 701, an adjustment platform 702, and an extension adjustment assembly. The adjustment positioning column 701 has a predetermined working distance from the bearing unit, and possesses predetermined working dimensions and supporting force, enabling corresponding bearing and positioning operations. The adjustment platform 702 is connected to the adjustment positioning column 701, and also possesses predetermined working dimensions and supporting force, enabling corresponding bearing and limiting operations. The extension adjustment assembly is movably connected to the adjustment platform 702, and possesses predetermined working length and supporting force, allowing for adjustment operations within a predetermined range.

[0031] The extension adjustment assembly comprises three components: a rotating platform 703, a vertical extension arm 704, and a horizontal extension arm 705. The rotating platform 703 is rotatably connected to the adjustment platform 702, has a predetermined working size and load-bearing capacity, and can perform rotational adjustment operations within a predetermined range. The vertical extension arm 704 is rotatably connected to the rotating platform 703, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range. The horizontal extension arm 705 is rotatably connected to the vertical extension arm 704, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range. During later operations, the rotation of the rotating platform 703 can drive the adjustment of the vertical extension arm 704 and the horizontal extension arm 705 to adjust their corresponding working angles. Furthermore, the rotation of the vertical extension arm 704 can drive the adjustment of the horizontal extension arm 705 to adjust its corresponding working height. In the later stages of operation, the clamping unit can be adjusted to the corresponding working position by rotating the lateral extension arm 705 itself, so as to cooperate with the multiple inspection unit to carry out the corresponding inspection work on the traffic sign.

[0032] The clamping unit comprises three components: a double-layer sliding rail 706, a shaped sliding block 707, and a rotating clamping plate 708. The double-layer sliding rail 706 is connected to the extension adjustment assembly, has a predetermined working length and supporting force, and is a double-layer structure capable of bearing and limiting operations. The shaped sliding block 707 is slidably connected to the double-layer sliding rail 706, fully covering the working surface of the double-layer sliding rail. The working surface of the shaped sliding block 707 has a cross-shaped groove, allowing for sliding adjustment within a predetermined range along the working surface of the double-layer sliding rail 706. The rotating clamping plate 708 is placed within the cross-shaped groove of the shaped sliding block 707 and is slidably connected to it, allowing for corresponding sliding adjustment along the cross-shaped groove. During later operations, the sliding adjustment of the shaped sliding block 707 can drive the rotating clamping plate 708 to adjust its working position accordingly. The structure of the rotating clamping plate 708 can refer to the clamping robot arm structure in the prior art, which is prior art and will not be described in detail in this application. During later operations, when the rotating clamping plate 708 needs to perform the clamping operation of traffic signs, it can be rotated and adjusted to a vertical operating state to perform the corresponding material handling operation. When the rotating clamping plate 708 is in an idle state, it can be rotated to a horizontal state to facilitate the operator's observation of the operating status and condition of each component.

[0033] There are multiple irregularly shaped sliding blocks 707 and rotating clamping plates 708, and all of them can be slidably adjusted within a predetermined range along the working surface of the double-layer sliding rail 706. The two ends of the short side of the cross groove provided in the irregularly shaped sliding block 707 are open, and the rotating clamping plate 708 can slide out along the open end of the cross groove. During later operations, when defective products are detected, the rotating clamping plate 708 holding the corresponding traffic sign slides upwards along the cross groove of the connected irregular sliding block 707 in the working direction, and then slides closer to the defective product recycling unit 10. This allows the rotating clamping plate 708 to slide out through the open end of the groove, bringing it to the upper position of the double-layer sliding rail 706. The rotating clamping plate 708 can then slide along the upper track of the double-layer sliding rail 706 to the corresponding position of the defective product recycling unit 10. The defective product is then placed on the working surface of the defective product recycling unit 10 for subsequent recycling processing. The irregular sliding block 707 and the rotating clamping plate 708 are rarely more than four, and are always in even numbers. During later operations, when the rotating clamping plate 708 is performing its corresponding clamping and limiting operations, it is positioned at the lower end of the irregularly shaped sliding block 707, corresponding to the lower layer of the double-layer sliding rail 706. Adjusting the working distance between the multiple irregularly shaped sliding blocks 707 will adjust the working distance of the corresponding rotating clamping plate 708, thus enabling clamping and limiting of traffic signs of different sizes. The multiple irregularly shaped sliding blocks 707 and the rotating clamping plate 708 can alternately perform corresponding material handling and inspection operations. Only when a defective product is detected will the rotating clamping plate 708 transport the defective product through the aforementioned steps. Since the transport of defective products is carried out through the upper layer of the double-layer sliding rail 706, defective products can be transported and processed without affecting other traffic sign inspection operations, thus maintaining overall inspection efficiency. After completing the corresponding defective product transportation operation, the rotating clamping plate 708 can reverse the above steps and return to the corresponding irregular sliding block 707, so that subsequent material clamping operations can be performed.

[0034] The multi-inspection unit comprises two components: a character inspection group 8 and a reflective inspection group 9. The character inspection group 8 includes a character positioning post 801 placed on the working surface of the supporting unit; a character adjustment post 802 slidably connected to the character positioning post 801; and a character infrared scanning tube 803 connected to the character adjustment post 802 and capable of adjusting its working position according to the sliding adjustment of the character adjustment post 802. The reflective inspection group 9 includes a reflective positioning post 901 placed on the working surface of the supporting unit; a reflective adjustment post 902 slidably connected to the reflective positioning post 901; and a reflective inspection lamp 903 connected to the reflective adjustment post 902 and capable of adjusting its working position according to the sliding adjustment of the reflective adjustment post 902. A predetermined working distance is maintained between the character inspection group 8 and the reflective inspection group 9. During subsequent operations, the surface of the traffic sign can be scanned and imaged using the character infrared scanning tube 803 to detect whether there are missing characters, distorted characters, or other defects. The reflective effect of traffic signs can be detected by the reflective inspection lamp 903, that is, to detect whether there are any abnormal reflections, poor reflection effects, uneven reflections, or other phenomena.

[0035] The defective product recycling unit 10 comprises two components: a positioning platform 101 and a sorting and recycling bin 102. The positioning platform 101 is placed on the working surface of the supporting unit, has predetermined working dimensions and supporting force, and can perform corresponding carrying and positioning operations. Multiple sorting and recycling bins 102 are symmetrically distributed at the front and rear ends of the positioning platform 101 in the working direction; each sorting and recycling bin 102 has predetermined containment capacity and is open at one end. Multiple pushing units are provided on the working surface of the positioning platform 101, symmetrically distributed on the working surface of the positioning platform 101, and their working positions correspond to the working positions of the sorting and recycling bins 102. Each pushing unit includes a telescopic column 103 and a pushing plate 104; the telescopic column 103 is placed on the working surface of the positioning platform 101, has predetermined telescopicity, and can perform telescopic adjustment operations within a predetermined range; the pushing plate 104 is connected to the telescopic column 103 and can adjust its working position accordingly by following the telescopic adjustment of the telescopic column 103. In the later stages of operation, defective products can first be transported to the positioning stage 101 via the rotating clamping plate 708, and then the pushing unit pushes the defective products with corresponding problems into different sorting and recycling bins 102. In a further preferred embodiment, the character inspection group 8, the reflective inspection group 9, the defective product recycling unit 10, and the clamping unit are all interconnected via corresponding wireless signals, enabling corresponding signal input and output operations. During the later stages of operation, when a corresponding defective product is detected, the character inspection group 8 and the reflective inspection group 9 will send corresponding signals to the defective product recycling unit 10, and then the defective product recycling unit 10 will record the signals sequentially. When the positioning stage 101 detects the arrival of a corresponding defective product, it will classify the defective product according to the recorded signals and push the defective products of different problem types into the corresponding sorting and recycling bins 102 via the pushing unit. When a defective product is detected by the character inspection group 8, the stacking unit located at the rear end of the positioning platform 101 in the working direction is activated, pushing the defective product into the sorting and recycling bin 102 located at the front end of the positioning platform 101 in the working direction. When a defective product is detected by the reflectivity inspection group 9, the pushing unit located at the front end of the positioning platform 101 in the working direction is activated, pushing the defective product into the sorting and recycling bin 102 located at the rear end of the positioning platform 101 in the working direction. In later operations, the pushing plate 104 can be driven by the telescopic column 103 to perform corresponding pushing operations, thereby pushing the defective product into the corresponding sorting and recycling bin 102 for recycling.

[0036] Each component in this application can be driven by a corresponding motor, which is prior art and will not be described in detail here.

[0037] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An automatic screening device for inspecting traffic signs, characterized in that: include: The base includes a load-bearing unit with predetermined operating dimensions and supporting capacity; A support unit connected to the bearing unit, having a predetermined operating height and supporting force; The feeding clamping assembly includes an adjustment unit that has a predetermined working distance from the carrying unit and has a predetermined supporting force and working height; and a clamping unit connected to the adjustment unit that has a predetermined working length and supporting force. The inspection screening assembly includes multiple inspection units placed on the working surface of the carrying unit; A defective product recycling unit is placed on the working surface of the carrying unit and is separated from the multiple inspection unit by a predetermined working distance; The adjustment unit includes: The positioning column is adjusted to maintain a predetermined working distance from the bearing unit, and has a predetermined working size and supporting force, enabling corresponding bearing and positioning operations. The adjustment platform, connected to the adjustment positioning column, has a predetermined working size and supporting force, and can perform corresponding load-bearing and limiting operations. The extension adjustment assembly is movably connected to the adjustment platform, has a predetermined working length and supporting force, and can perform adjustment operations within a predetermined range; The clamping unit includes: The double-layer sliding rail, connected to the extension adjustment group, has a predetermined working length and support force, and is a double-layer structure, which can perform corresponding load-bearing and limiting operations. An irregularly shaped sliding block is slidably connected to the double-layer sliding rail and fully covers the working surface of the double-layer sliding rail. The working surface of the irregularly shaped sliding block is provided with a cross groove, which can be slidably adjusted within a predetermined range along the working surface of the double-layer sliding rail. The rotating clamping plate is placed in the cross groove of the irregular sliding block and slidably connected with the irregular sliding block, and can be slidably adjusted along the cross groove. There are multiple irregularly shaped sliding blocks and rotating clamping plates, and each of them can be adjusted within a predetermined range along the working surface of the double-layer sliding rail. The short sides of the cross groove of the irregular sliding block are open, and the rotating clamping plate can slide out along the open end of the cross groove.

2. The automatic screening device for inspecting traffic signs according to claim 1, characterized in that, The carrier unit includes: The support frame has predetermined working dimensions and support capacity, and can perform corresponding support and limiting operations; The support plate, connected to the support frame, has a predetermined working area and supporting force, and can perform corresponding load-bearing and limiting operations.

3. The automatic screening device for inspecting traffic signs according to claim 2, characterized in that, The support unit includes: The support column, with one end connected to the bearing frame, has a predetermined working length and supporting force, and can perform corresponding support and connection operations; The support plate, connected to the support column, has a predetermined working area and supporting force, and can perform corresponding support and limiting operations. There are multiple support columns and support plates, which are arranged in an array on the working surface of the support frame.

4. The automatic screening device for inspecting traffic signs according to claim 1, characterized in that, The extended adjustment group includes: The rotating table, rotatably connected to the adjusting table, has a predetermined working size and load-bearing capacity, and can perform rotational adjustment operations within a predetermined range; The vertical extension arm is rotatably connected to the rotating table, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range; The lateral extension arm is rotatably connected to the vertical extension arm, has a predetermined working length and supporting force, and can perform rotational adjustment operations within a predetermined range.

5. The automatic screening device for inspecting traffic signs according to claim 1, characterized in that, The multiple verification unit includes: The character inspection group includes a character positioning post placed on the working surface of the bearing unit; a character adjustment post slidably connected to the character positioning post; and a character infrared scanning tube connected to the character adjustment post and capable of adjusting the corresponding working position by following the sliding adjustment of the character adjustment post. The reflective inspection group includes a reflective positioning column placed on the working surface of the bearing unit; a reflective adjusting column slidably connected to the reflective positioning column; and a reflective inspection lamp connected to the reflective adjusting column and capable of adjusting its working position according to the sliding adjustment of the reflective adjusting column. A predetermined working distance is maintained between the character inspection group and the reflective inspection group.

6. The automatic screening device for inspecting traffic signs according to claim 1, characterized in that, The defective product recycling unit includes: The positioning platform, placed on the working surface of the bearing unit, has a predetermined working size and supporting force, and can perform corresponding bearing and positioning operations; Multiple recycling bins are symmetrically distributed at the front and rear ends of the positioning platform in the working direction; each recycling bin has a predetermined containment capacity and is open at one end. The working surface of the positioning platform is provided with a pushing unit; there are multiple pushing units, which are symmetrically distributed on the working surface of the positioning platform, and their working positions correspond to the working positions of the sorting and recycling bins. The pushing unit includes a telescopic column and a pushing plate; the telescopic column is placed on the working surface of the positioning table and has a predetermined telescopicity, allowing for telescopic adjustment within a predetermined range; the pushing plate is connected to the telescopic column and can be adjusted to the corresponding working position following the telescopic column's telescopic adjustment.

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