Poker card spot inspection machine

Abstract

A poker card point inspection machine comprises a machine frame, a discharging bin, a first conveying belt, a friction wheel set, a second conveying belt, a camera shooting module, a data processing system and a material receiving mechanism, and the discharging bin is arranged on the machine frame and used for storing poker cards to be detected; the first conveying belt is located at the bottom of the discharging bin and conveys playing cards at a constant speed. Friction wheels of the friction wheel set and the first conveying belt rotate reversely, a difference exists between the rotating speed and the linear speed of the conveying belt, and the gap is the thickness of a single playing card, so that the playing cards are separated one by one; a second conveyor belt receives and conveys the separated playing cards, a high-speed camera performs image acquisition on card surfaces, and a data processing system analyzes the images, detects flaws, marks and the like and stores data; by means of the unique structural design, the problems that in the prior art, the playing card distributing efficiency is low, detection is not accurate and the like are solved, efficient playing card distributing, accurate detection and orderly receiving of the playing cards are achieved, the playing card distributing efficiency is improved, the playing card distributing efficiency is improved, and the playing card distributing efficiency is improved. And the overall efficiency and quality of poker point inspection are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of poker production, and particularly to a poker inspection machine. Background Art

[0002] In the poker production industry, the market demand for poker shows a continuous growth trend. This makes production efficiency and product quality the core points of concern for enterprises. Among them, poker detection equipment, as a key link to ensure product quality, its performance directly affects the production efficiency of enterprises.

[0003] In early poker detection equipment, some inspection equipment with relatively fast detection speeds had functional shortcomings. Such equipment usually only had the function of counting one by one. During detection, only one card was used for image acquisition, and then the situation of the whole deck of cards was inferred based on the situation of this card. Although the detection speed can meet the general production rhythm to a certain extent, this detection method cannot comprehensively and carefully check the suits of poker cards, nor can it accurately identify all defects. Therefore, such equipment is only suitable for the detection of general poker cards with relatively low quality requirements.

[0004] However, some clubs, in order to pursue high quality, often customize some high-end poker cards. These high-end poker cards have extremely strict requirements for the card face suits. It is necessary to comprehensively and carefully detect the suits and defects of all cards to ensure that each card meets high standards. Ordinary inspection equipment obviously cannot meet this requirement.

[0005] Later, some equipment capable of fully inspecting suits also appeared on the market. Such equipment has made progress in function and can comprehensively detect the suits of poker cards. However, limited by the structure, its detection speed is extremely slow, only about 4 decks of cards can be detected per minute. Moreover, during the detection process, some special cards, such as the big and small jokers, often need to be manually removed to successfully complete the full inspection work. This not only increases the complexity of operation and labor costs, but also cannot achieve an automated and efficient detection process.

[0006] Moreover, in terms of the card distribution mechanism, since such equipment only uses a single belt conveyor to convey poker cards. During actual operation, due to the friction between the conveyor belt and the cards, the poker cards are extremely prone to stacking or jamming. This not only affects the accuracy of detection, resulting in some defective cards or incorrect card sequences being difficult to accurately identify by the camera, but also further reduces the overall detection efficiency. Because once stacking or jamming occurs, the equipment needs to pause for manual intervention, making the detection work unable to be carried out continuously and efficiently. The defects of this card distribution mechanism cannot meet the requirements of fast and efficient modern production, restricting the development of poker production enterprises.

[0007] In summary, the existing production and detection technologies of playing cards cannot achieve efficient connection and precise operation in terms of detection speed, card sequence inspection, defect detection, card dealing mechanism, etc., and cannot meet the requirements of playing card production enterprises for efficient, precise, and reliable quality detection and processing.

[0008] Therefore, how to provide a technical solution to effectively avoid the technical status quo of low efficiency and easy occurrence of stacked card jams in the card dealing link, which in turn affects the overall detection speed and accuracy, is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a playing card inspection machine that can achieve efficient separation and precise arrangement of playing cards through a unique collaborative design of a conveyor belt and a friction wheel, so as to improve the overall inspection efficiency and quality in view of the above technical status quo.

[0010] The technical solution adopted by the present invention to solve the above technical problem is as follows: The playing card inspection machine includes a frame, and also includes

[0011] A feeding bin, which is arranged on the frame and is used for stacking and placing the playing cards to be detected;

[0012] A first conveyor belt, which is horizontally arranged on the frame and is located at the bottom of the feeding bin, and can convey playing cards at a constant speed;

[0013] A friction wheel group, the friction wheels of which are arranged in parallel with the first conveyor belt and rotate in the opposite direction. The rotational speed of the friction wheel has a difference from the linear speed of the first conveyor belt to form a controllable resistance. The gap between the friction wheel and the first conveyor belt is set to the thickness of a single playing card, and the playing cards are separated one by one through the synergistic action of friction and resistance, and stacked cards or jams are avoided;

[0014] A second conveyor belt, which is arranged on the frame and is connected to the downstream of the first conveyor belt, and is used for receiving and conveying the separated single playing cards;

[0015] A camera module, including a high-speed camera capable of front focusing, which is arranged above the second conveyor belt and is used for real-time image acquisition of the front of a single playing card;

[0016] A data processing system, which is communicatively connected to the camera module, detects card surface defects, printing errors, and cheating marks through image recognition algorithms, and can store the detection data and generate a quality traceability report;

[0017] A receiving mechanism, which is connected to the output end of the second conveyor belt and is connected to the data processing system, and is used for grouping and storing the qualified playing cards according to a preset card sequence or a random card sequence.

[0018] To optimize the overall structure of the card feeding bin and enable it to cooperate with the friction wheel group to achieve efficient card sorting, preferably, the card feeding bin includes a mounting base and side plates. The mounting base is fixed to the frame, and the side plates are vertically arranged on the mounting base and enclose a receiving cavity for stacking playing cards vertically. An outlet for separating playing cards is formed at the bottom of the receiving cavity;

[0019] The friction wheel group is mounted on the mounting base and is located at the bottom outlet of the receiving cavity for cooperating with the first conveyor belt to separate playing cards.

[0020] To ensure the stable rotation of the friction wheel and provide reliable card sorting power, preferably, the friction wheel group further includes a driving motor and a coupling. The driving motor is fixed to the mounting base and is connected to the rotating shaft of the friction wheel through the coupling to drive the friction wheel to rotate;

[0021] A bearing seat is provided on the mounting base, and a rolling bearing is provided in the bearing seat. The rotating shaft of the friction wheel is mounted on the mounting base through the rolling bearing.

[0022] To optimize the stability and accuracy of the playing cards during the conveying process, ensure that the playing cards can smoothly transition from the first conveyor belt to the receiving mechanism, and reduce the occurrence of situations such as deviation and dropping, preferably, a first guiding wheel is provided between the first conveyor belt and the second conveyor belt, and a second guiding wheel is provided between the second conveyor belt and the receiving mechanism. Both the first guiding wheel and the second guiding wheel are mounted on the frame, and the frame is further provided with a first auxiliary pressing wheel group and a second auxiliary pressing wheel group that respectively cooperate with the first guiding wheel and the second guiding wheel;

[0023] The first auxiliary pressing wheel group includes two first auxiliary pressing wheels arranged at intervals along the running direction of the first conveyor belt. One of the first auxiliary pressing wheels is arranged above the first guiding wheel and forms a gap for a single playing card to pass through between it and the first guiding wheel, and the other first auxiliary pressing wheel is arranged above the input end of the second conveyor belt and forms a gap for a single playing card to pass through between it and the second conveyor belt;

[0024] The second auxiliary pressing wheel group includes two second auxiliary pressing wheels arranged at intervals along the running direction of the second conveyor belt. One of the second auxiliary pressing wheels is arranged above the output end of the second conveyor belt and forms a gap for a single playing card to pass through between it and the second conveyor belt, and the other second auxiliary pressing wheel is arranged above the second guiding wheel and forms a gap for a single playing card to pass through between it and the second guiding wheel;

[0025] The rotation direction of the first guide wheel is consistent with the running direction of the first conveyor belt, the rotation direction of the second guide wheel is consistent with the running direction of the second conveyor belt, the rotation direction of the first auxiliary pressure wheel group is opposite to the running direction of the first conveyor belt, and the rotation direction of the second auxiliary pressure wheel group is opposite to the running direction of the second conveyor belt. Through the clamping action and direction synergy of the guide wheels, the first auxiliary pressure wheel group and the second auxiliary pressure wheel group, it is ensured that the separated single playing cards can smoothly transition from the first conveyor belt to the second conveyor belt and then to the material receiving mechanism.

[0026] To prevent the displacement of the playing cards on the second conveyor belt and improve the detection accuracy, preferably, a plurality of suction holes penetrating in the thickness direction are provided on the second conveyor belt, and at least one negative pressure suction device is further provided below the second conveyor belt. The air inlet end (5b1) of the negative pressure suction device is communicated with the suction holes. When the second conveyor belt is in operation, the separated single playing cards can be fixed on the second conveyor belt through negative pressure suction.

[0027] To limit the lateral offset of the second conveyor belt and ensure the conveying accuracy of the playing cards, preferably, at least a pair of vertically rotating and oppositely distributed positioning wheels are attached to both sides of the second conveyor belt, and the positioning wheels are installed on the frame;

[0028] A groove is formed on the circumferential surface of the positioning wheel, and the width of the groove is adapted to the thickness of the second conveyor belt to limit the lateral offset of the second conveyor belt.

[0029] To accurately collect the images of the playing cards, ensure accurate detection, and reduce the risk of false triggering, preferably, a concave portion is formed in the middle section of the second conveyor belt. The concave portion is formed by adjusting the horizontal direction of the second conveyor belt through multiple transmission shafts, and the area that the high-speed camera can capture is located downstream of the concave portion;

[0030] The imaging module further includes a trigger sensor, and the trigger sensor is arranged in the concave portion. When a single playing card passes through the concave portion, the high-speed camera can be timely triggered to perform shooting to ensure that the images of each playing card can be accurately collected at the set position.

[0031] In order to further enhance the conveying stability of the playing cards in the concave area of the second conveyor belt, ensure that the playing cards running at high speed maintain an accurate position and good state when passing through the special detection area, and avoid affecting the detection accuracy due to displacement or warping. Preferably, a third auxiliary pressure wheel group is further provided on the frame above the second conveyor belt. The third auxiliary pressure wheel group includes two third auxiliary pressure wheels arranged at intervals along the running direction of the second conveyor belt. The two third auxiliary pressure wheels are respectively located on both sides of the concave part. The third auxiliary pressure wheel is a passive rotation structure, and its rotation direction is opposite to the running direction of the second conveyor belt. By means of contact pressure, it assists in fixing a single playing card running at high speed to pass through the concave part and prevents the playing cards from being displaced or warped.

[0032] In order to reduce the difficulty of card distribution and improve the card distribution efficiency, preferably, a lifting pipe pointing to the bottom opening of the feeding bin is further provided on the frame. The end of the lifting pipe is formed with an inclined surface that can be inserted into the bottom of the stacked playing cards. The inclined surface can locally lift the playing cards at the bottom of the feeding bin to reduce the contact area between the bottom playing cards and the first conveyor belt.

[0033] To achieve intelligent collection of playing cards, grouping by deck, and improve the collection efficiency, preferably, the collection mechanism includes a chain and a plurality of collection bins arranged at intervals on the chain. The transmission direction of the chain is perpendicular to the running direction of the second conveyor belt to facilitate connection to the output end of the second conveyor belt;

[0034] The storage capacity of each collection bin is adapted to the number of playing cards in a single deck. The chain drives the collection bins to move to the receiving station in turn through intermittent transmission;

[0035] The data processing system real-time counts the number of single playing cards that have completed detection. When the number of playing cards in the collection bin reaches the preset value of a single deck, it can control the chain to step forward one station, driving the next empty collection bin to align with the output end of the second conveyor belt to achieve the sequential collection of playing cards and grouping by deck.

[0036] To facilitate the operator to monitor the detection situation in real time and discover problems in a timely manner, preferably, the data processing system includes a display. The display is provided on the frame, and the display can real-time display the front image of the playing cards captured by the high-speed camera and the detection results.

[0037] Compared with the prior art, the advantages of the present invention are as follows: By providing a feeding bin for stacking and placing the playing cards to be inspected, and cooperating with the first conveyor belt at the bottom to receive the playing cards, and then using a friction wheel that rotates in the opposite direction to the first conveyor belt and has a different rotation speed, with a gap of about the thickness of one playing card reserved between the two, the playing cards can be efficiently separated under the combined action of friction and resistance, avoiding the phenomenon of card stacking or jamming, and solving the problem of low card distribution efficiency in the prior art;

[0038] After dealing the cards, the second conveyor belt receives and transports the separated single playing cards. In cooperation with the high-speed camera located above it, high-definition imaging can be carried out on each card. Combining with the image recognition algorithm preset in the data processing system, it can accurately analyze whether there are surface defects such as scratches and printing errors on the card face, as well as cheating marks, and store the detection data in the hard disk for quality traceability, making up for the deficiencies of the existing technology in terms of difficult to comprehensively and meticulously inspect the card face, unable to effectively identify defects and marks, and lack of data archiving mechanism;

[0039] The entire process is closely coordinated, greatly improving the inspection efficiency of the whole machine, breaking through the speed bottleneck of the existing technology, achieving high-speed inspection, meeting the needs of large-scale playing card production enterprises for fast and accurate detection, effectively shortening the production cycle, reducing enterprise costs, and enhancing market competitiveness. Brief Description of the Drawings

[0040] Figure 1 is the three-dimensional structure schematic diagram of this embodiment;

[0041] Figure 2 is the sectional structure schematic diagram of this embodiment;

[0042] Figure 3 is Figure 2 the enlarged schematic diagram of the structure of part A of

[0043] Figure 4 is Figure 2 the enlarged schematic diagram of the structure of part B of

[0044] Figure 5 is the three-dimensional structure schematic diagram of the feeding bin in this embodiment;

[0045] Figure 6 is the exploded state structure schematic diagram of the feeding bin in this embodiment;

[0046] Figure 7 is the three-dimensional structure schematic diagram of the positioning wheel in this embodiment;

[0047] Figure 8 is the three-dimensional structure schematic diagram of the negative pressure air suction device in this embodiment;

[0048] Figure 9 is the three-dimensional structure schematic diagram of the material receiving mechanism in this embodiment. Detailed Description of the Invention

[0049] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0050] As Figures 1 to 9As shown, this is the best embodiment of the present invention. The poker inspection machine in this embodiment mainly includes a frame 1, a feeding bin 2, a first conveyor belt 3, a friction wheel group 4, a second conveyor belt 5, a camera module 6, a data processing system 7, a receiving mechanism 8, etc.

[0051] Among them, referring to Figure 1 and Figure 2 As shown, the feeding bin 2 is arranged on the frame 1 and is used for stacking the poker cards to be detected; the first conveyor belt 3 is horizontally arranged on the frame 1 and is located at the bottom of the feeding bin 2 and can convey the poker cards at a constant speed; the friction wheel group 4 has a friction wheel 4a arranged in parallel with the first conveyor belt 3 and rotating in the opposite direction, and there is a difference between the rotational speed of the friction wheel 4a and the linear speed of the first conveyor belt 3 to form a controllable resistance. The gap between the friction wheel 4a and the first conveyor belt 3 is set to the thickness of a single poker card. Through the synergistic action of friction and resistance, the poker cards are separated one by one, and card stacking or jamming is avoided; the second conveyor belt 5 is arranged on the frame 1 and is connected downstream of the first conveyor belt 3 and is used to receive and convey the separated single poker cards; the camera module 6 is arranged above the second conveyor belt 5 and includes a high-speed camera 6a that can focus frontally and is used for real-time image acquisition of the front of a single poker card; the data processing system 7 is communicatively connected to the camera module 6, detects card face defects, printing errors, and cheating marks through image recognition algorithms, and can store the detection data and generate a quality traceability report; the receiving mechanism 8 is connected to the output end of the second conveyor belt 5 and is connected to the data processing system 7 and is used to group and store the qualified poker cards in a preset card order or a random card order.

[0052] The following elaborates in detail the specific structures and respective installation methods of each component:

[0053] Frame 1 construction: As Figure 1 shown, high-strength metal materials are selected to make the frame 1. Each part of the components is assembled according to the design drawings, and each connection point is fixed by welding, bolts or other connection methods to ensure that the frame 1 has a stable structure and can withstand various forces during the operation of the equipment, ensuring the stability of the overall structure.

[0054] Installation of the feeding bin 2: As Figure 1 , Figure 5 and Figure 6 shown, the feeding bin 2 is composed of a mounting seat 2a and side plates 2b. First, the mounting seat 2a is firmly fixed at the designated position on the frame 1 by bolts or welding to ensure that the mounting seat 2a is horizontal and stable. Then, the vertical side plates 2b are installed on the mounting seat 2a and are welded or bolted to form a receiving cavity 2c that can stack poker cards vertically. An outlet 2d slightly larger than a single poker card is opened at the bottom of the receiving cavity 2c to facilitate the smooth falling of the poker cards.

[0055] Installation of the friction wheel group 4: Refer to Figure 5And Figure 6 As shown, the friction wheel set 4 is installed on the mounting seat 2a of the material discharging bin 2 and is located at the bottom outlet 2d of the accommodating cavity 2c. A bearing seat 2a1 is installed on the mounting seat 2a, a rolling bearing 2a2 is loaded into the bearing seat 2a1, and the rotating shaft of the friction wheel 4a is installed on the rolling bearing 2a2 so that the friction wheel 4a can rotate flexibly. The driving motor 4b is fixed on the mounting seat 2a and is connected to the rotating shaft of the friction wheel 4a through a coupling 4c to ensure that the driving motor 4b can stably drive the friction wheel 4a to rotate in the reverse direction and is arranged in parallel with the first conveyor belt 3.

[0056] Installation of the conveyor belt: Refer to Figures 2 to 4 As shown, the first conveyor belt 3 is horizontally installed on the frame 1 and is located at the bottom of the material discharging bin 2. Its length and width are determined according to the overall design of the equipment to ensure that it can receive the playing cards falling from the material discharging bin 2. The second conveyor belt 5 is installed downstream of the first conveyor belt 3. By adjusting the mounting brackets on the frame 1, the second conveyor belt 5 is kept parallel to the first conveyor belt 3 and is smoothly connected.

[0057] A first guide wheel 9a is provided between the first conveyor belt 3 and the second conveyor belt 5, and a second guide wheel 9b is provided between the second conveyor belt 5 and the material receiving mechanism 8. Both the first guide wheel 9a and the second guide wheel 9b are installed on the frame 1. The first guide wheel 9a is installed at a suitable position between the first conveyor belt 3 and the second conveyor belt 5 to ensure that its rotation direction is the same as the running direction of the first conveyor belt 3; the second guide wheel 9b is installed between the second conveyor belt 5 and the material receiving mechanism 8 to ensure that its rotation direction is the same as the running direction of the second conveyor belt 5.

[0058] The rack 1 is also provided with a first auxiliary pressure wheel group 9c and a second auxiliary pressure wheel group 9d which respectively cooperate with the first guide wheel 9a and the second guide wheel 9b. The first auxiliary pressure wheel group 9c includes two first auxiliary pressure wheels 9c1 arranged at intervals along the running direction of the first conveyor belt 3. One of the first auxiliary pressure wheels 9c1 is arranged above the first guide wheel 9a, forming a gap through which a single playing card can pass between it and the first guide wheel 9a. The other first auxiliary pressure wheel 9c1 is arranged above the input end of the second conveyor belt 5, forming a gap through which a single playing card can pass between it and the second conveyor belt 5. The second auxiliary pressure wheel group 9d includes two second auxiliary pressure wheels 9d1 arranged at intervals along the running direction of the second conveyor belt 5. One of the second auxiliary pressure wheels 9d1 is arranged above the output end of the second conveyor belt 5, forming a gap through which a single playing card can pass between it and the second conveyor belt 5. The other second auxiliary pressure wheel 9d1 is arranged above the second guide wheel 9b, forming a gap through which a single playing card can pass between it and the second guide wheel 9b. Both the first auxiliary pressure wheel group 9c and the second auxiliary pressure wheel group 9d are passive rotation structures, and their rotation directions are opposite to the running directions of the first conveyor belt 3 and the second conveyor belt 5 respectively. These auxiliary pressure wheels are all installed on the rack 1 through adjustable brackets, and can be adjusted up and down to adjust the pressure between them and the conveyor belt according to factors such as the thickness and material of the playing cards, so as to ensure the stable clamping and conveying of the playing cards.

[0059] In the middle section area of the second conveyor belt 5, its horizontal direction is adjusted through multiple transmission shafts to form a concave portion 5c. To ensure that the high-speed camera 6a can clearly photograph the playing cards, no auxiliary pressure wheels are arranged in the photographing area. Instead, a plurality of adsorption holes 5a penetrating along the thickness direction are opened on the second conveyor belt 5, and at least one negative pressure air suction device 5b is installed below the second conveyor belt 5, so that the air suction device 5b is communicated with an external negative pressure air source through an air outlet hole 5b2, and the air inlet end 5b1 of the air suction device 5b is kept communicated with the adsorption holes 5a, and the playing cards are fixed on the conveyor belt by negative pressure adsorption to ensure the stable position of the playing cards during photographing. The area that the high-speed camera 6a can photograph is located downstream of the concave portion 5c.

[0060] Installation of the camera module 6: Refer to Figure 1 and Figure 2 As shown in

[0061] Connection of the data processing system 7: Refer to Figure 1As shown, the data processing system 7 is installed at a suitable position on the rack 1. It also includes a display 7a. The high-speed camera 6a and the trigger sensor 6b of the camera module 6 are connected to the data processing system 7 through data lines to ensure the stable transmission of image data and trigger signals to the data processing system 7. The preset image recognition algorithm is used to process and analyze them to accurately detect whether there are defects on the card surface, such as scratches, damages, printing errors, such as blurred patterns, color deviations, and cheating marks and other various problems, providing a basis for the quality inspection of playing cards. The display 7a is installed at a suitable position on the rack 1 for real-time displaying the front image of the playing card captured by the high-speed camera 6a and the detection results, as the output display part of the data processing system 7, facilitating the operator to observe in time.

[0062] Installation of the material receiving mechanism 8: Refer to Figure 1 and Figure 9 As shown, the material receiving mechanism 8 is installed on the side of the output end of the second conveyor belt 5. The material receiving mechanism 8 includes a chain 8a and a material receiving bin 8b. The chain 8a is installed on the rack 1 so that its driving direction is perpendicular to the running direction of the second conveyor belt 5. The material receiving bins 8b are arranged at intervals on the chain 8a. The receiving capacity of the material receiving bin 8b is designed according to the number of a single deck of playing cards to ensure that a single deck of playing cards can be accurately received. Connect the motor and controller that control the intermittent transmission of the chain 8a, and connect the controller to the data processing system 7 to achieve the precise control of the transmission of the chain 8a by the data processing system 7.

[0063] Installation of other auxiliary components: Refer to Figure 1 and Figure 7 As shown, on both sides of the second conveyor belt 5, at least a pair of vertically rotating and relatively distributed positioning wheels 5b are installed through brackets. A groove 5a1 is machined on the circumferential surface of the positioning wheel 5b. The width of the groove 5a1 is adapted to the thickness of the second conveyor belt 5, so that the positioning wheel 5b can effectively limit the lateral offset of the second conveyor belt 5.

[0064] Refer to Figure 2 and Figure 3 As shown, on the rack 1, in addition to the shooting area, one or more groups of third auxiliary pressure wheel groups 5d are installed. The third auxiliary pressure wheel group 5d is located above the second conveyor belt 5. The third auxiliary pressure wheel group 5d includes two third auxiliary pressure wheels 5d1 arranged at intervals along the running direction of the second conveyor belt 5. The two third auxiliary pressure wheels 5d1 are respectively located on both sides of the lower concave part 5c. The third auxiliary pressure wheel 5d1 is a passive rotation structure and is installed on the rack 1 through an adjustable bracket, and the contact pressure with the second conveyor belt 5 can be adjusted up and down to adapt to the conveying requirements of different playing cards, ensuring that it can assist in fixing the playing cards running at high speed to pass through the lower concave part 5c and preventing the playing cards from shifting or warping.

[0065] Refer to Figure 2 andFigure 4 As shown in the figure, a lifting pipe 10 pointing to the bottom opening of the feeding bin 2 is installed on the rack 1. The end of the lifting pipe 10 is processed with an inclined surface 10a that can be inserted into the bottom of the stacked playing cards, and the position of the lifting pipe 10 is adjusted so that the inclined surface 10a can locally lift the playing cards at the bottom of the feeding bin 2, reducing the contact area between them and the first conveyor belt 3.

[0066] The specific working principle of this embodiment is elaborated in detail below:

[0067] Card sorting preparation: Stack the playing cards to be detected vertically in the accommodation cavity 2c of the feeding bin 2, insert the inclined surface 10a of the lifting pipe 10 under the bottom layer of playing cards, reduce the contact area between the bottom layer of playing cards and the first conveyor belt 3, and reduce the friction force, which is convenient for subsequent card sorting operations. In the traditional method, the bottom layer of playing cards has a large contact area with the conveyor belt, resulting in a large friction force, which is not conducive to single-piece separation. However, this design can make the playing cards easier to be driven.

[0068] Card sorting process: After the stacked playing cards are placed vertically in the accommodation cavity 2c of the feeding bin 2, the first conveyor belt 3 starts to move at a constant speed. At the same time, the friction wheel 4a rotates in the reverse direction driven by the drive motor 4b, and its rotation speed is different from that of the first conveyor belt 3, thereby generating a controllable resistance. A gap of about the thickness of one card is reserved between the conveyor belt and the friction wheel. During this process, under the combined action of the friction force and the resistance, the cards are separated by the number of cards at high speed, avoiding card stacking or jamming, and the playing cards are evenly separated one by one, ensuring that each playing card is arranged separately. Compared with the traditional single belt conveyor card sorting method, the card sorting efficiency is greatly improved.

[0069] Transportation process: The separated playing cards fall on the first conveyor belt 3 and are transported to the first guiding wheel 9a. Under the clamping action of the first guiding wheel 9a and the first auxiliary pressure wheel group 9c, the playing cards are smoothly transferred from the first conveyor belt 3 to the second conveyor belt 5. Since the first auxiliary pressure wheel group 9c can be adjusted up and down, the clamping force can be adjusted according to the actual situation of the playing cards to ensure that the playing cards will not shift or fall during the transition process.

[0070] On the second conveyor belt 5, except for the shooting area, the adsorption holes 5a and the negative pressure air suction device 5b below work together to firmly fix the playing cards on the conveyor belt through negative pressure adsorption; the positioning wheels 5b on both sides are in close contact with the second conveyor belt 5 through the grooves 5a1, restricting the lateral offset of the second conveyor belt 5; the upper third auxiliary pressure wheel group 5d is a passive rotation structure and can be adjusted up and down. According to the transportation state of the playing cards, the contact pressure between the third auxiliary pressure wheel group 5d and the second conveyor belt 5 is adjusted to further fix the playing cards and prevent them from generating displacement or warping during high-speed operation.

[0071] When the playing cards move to the concave part 5c along with the second conveyor belt 5, the trigger sensor 6b is triggered to sense the arrival of the playing cards. The concave part 5c keeps the position of the playing cards relatively stable, which is conducive to the accurate sensing of the trigger sensor 6b. The trigger sensor 6b immediately sends a signal to the high-speed camera 6a, triggering the high-speed camera 6a to take a high-definition photo of the front side of the playing cards. Since there is no auxiliary pressing wheel in the shooting area, the adsorption holes 5a and the negative pressure suction device 5b are relied on to ensure the stability of the playing cards during shooting, avoiding the occlusion or interference of the auxiliary pressing wheel on the shooting, and ensuring that the high-speed camera 6a can clearly and accurately collect the front image of the playing cards.

[0072] Detection process: The front image of the playing cards taken by the high-speed camera 6a is transmitted to the data processing system 7 in real time. The data processing system 7 is preset with an image recognition algorithm to analyze the collected images and detect whether there are defects on the card surface, such as scratches, damages, printing errors (such as blurred patterns, color deviations), and cheating marks. If a defect is detected on one of the cards, to prevent mis-shot cards from being mixed in, the equipment will immediately stop, take out this deck of cards for inspection, and only resume normal production after inspection. The data processing system 7 will also store the detection data in the hard disk and generate a quality traceability report at the same time, which is convenient for subsequent quality control and problem tracing. The detection results will be displayed on the monitor 7a of the data processing system 7 in real time, facilitating the operator to promptly grasp the detection situation and improving the controllability and transparency of the entire detection process.

[0073] Receiving process: The qualified playing cards continue to move to the output end along with the second conveyor belt 5. At this time, the second guide wheel 9b comes into play. Its rotation direction is the same as the running direction of the second conveyor belt 5, guiding the playing cards to move towards the receiving mechanism 8. During the guiding process, the second auxiliary pressing wheel group 9d assists the second guide wheel 9b to work. The second auxiliary pressing wheel group 9d can be adjusted up and down. According to the state of the playing cards entering the receiving bin 8b, the clamping force between the second auxiliary pressing wheel group 9d and the second guide wheel 9b is adjusted to ensure that the playing cards can smoothly and accurately transition from the second conveyor belt 5 to the receiving bin 8b of the receiving mechanism 8.

[0074] The transmission direction of the chain 8a of the receiving mechanism 8 is perpendicular to the running direction of the second conveyor belt 5. Multiple receiving bins 8b are arranged at intervals on the chain 8a, and the receiving capacity of each receiving bin 8b is adapted to the number of a single deck of playing cards. Before the equipment runs, the chain 8a moves an empty receiving bin 8b to the receiving station, aligns it with the output end of the second conveyor belt 5, and prepares to receive the qualified playing cards after detection.

[0075] After the qualified playing cards are detected and run to the output end along the second conveyor belt 5, they fall into the receiving bin 8b. The data processing system 7 can count the number of detected playing cards in real time. When the number of playing cards in the receiving bin 8b reaches the preset value of a single deck of cards, the data processing system 7 will control the chain 8a to step forward one station, so that the next empty receiving bin 8b moves to the material receiving station to continue receiving playing cards. Through this intermittent transmission and accurate quantity statistics, the single-by-single storage and grouping by deck of playing cards are realized, improving the intelligence and accuracy of material receiving.

[0076] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, back", "left, right", "up, down", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. The terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A playing card checking machine, comprising a frame (1), characterized in that: Also includes A material discharging bin (2) is arranged on the frame (1) and is used for stacking playing cards to be tested; A first conveyor belt (3) is horizontally arranged on the frame (1) and located at the bottom of the discharge bin (2), and can convey playing cards at a constant speed; A friction wheel assembly (4), wherein the friction wheel (4a) is arranged in parallel with the first conveyor belt (3) and rotates in the opposite direction, the rotation speed of the friction wheel (4a) differs from the linear speed of the first conveyor belt (3) to form a controllable resistance, the gap between the friction wheel (4a) and the first conveyor belt (3) is set to the thickness of a single playing card, and the playing cards are separated one by one through the synergistic effect of friction and resistance, and overlapping or jamming of the cards is avoided; A second conveyor belt (5), arranged on the frame (1) and connected to the downstream of the first conveyor belt (3), for receiving and conveying the separated single playing cards; A camera module (6) comprising a high-speed camera (6a) capable of front-facing focusing, the high-speed camera (6a) being arranged above the second conveyor belt (5) and being used for real-time image acquisition of the front side of a single playing card; A data processing system (7) is connected to the camera module (6) for detecting card surface defects, printing errors and cheating marks through an image recognition algorithm, and is capable of storing detection data and generating a quality traceability report; The material receiving mechanism (8) is connected to the output end of the second conveyor belt (5) and is connected to the data processing system (7) to group and store the qualified playing cards according to a preset card sequence or a random card sequence.

2. The playing card checking machine according to claim 1, characterized in that: The discharge bin (2) comprises a mounting seat (2a) and a side plate (2b), wherein the mounting seat (2a) is fixed on the frame (1), and the side plate (2b) is vertically arranged on the mounting seat (2a) and encloses a receiving cavity (2c) capable of vertically stacking playing cards, and an outlet (2d) for separating playing cards is formed at the bottom of the receiving cavity (2c); The friction wheel set (4) is mounted on the mounting seat (2a) and is located at the bottom outlet (2d) of the accommodating chamber (2c), and is used to cooperate with the first conveyor belt (3) to separate playing cards.

3. The playing card checking machine according to claim 2, characterized in that: The friction wheel assembly (4) further comprises a driving motor (4b) and a coupling (4c); the driving motor (4b) is fixed on the mounting seat (2a) and connected to the rotating shaft of the friction wheel (4a) via the coupling (4c) to drive the friction wheel (4a) to rotate; A bearing seat (2a1) is provided on the mounting seat (2a), a rolling bearing (2a2) is provided inside the bearing seat (2a1), and the rotating shaft of the friction wheel (4a) is mounted on the mounting seat (2a) via the rolling bearing (2a2).

4. The playing card checking machine according to claim 1, characterized in that: A first guide wheel (9a) is provided between the first conveyor belt (3) and the second conveyor belt (5), a second guide wheel (9b) is provided between the second conveyor belt (5) and the material receiving mechanism (8), the first guide wheel (9a) and the second guide wheel (9b) are both mounted on the frame (1), and the frame (1) is also provided with a first auxiliary pressing wheel group (9c) and a second auxiliary pressing wheel group (9d) respectively cooperating with the first guide wheel (9a) and the second guide wheel (9b); The first auxiliary pressing wheel group (9c) comprises two first auxiliary pressing wheels (9c1) arranged at intervals along the running direction of the first conveyor belt (3), wherein one of the first auxiliary pressing wheels (9c1) is arranged above the first guide wheel (9a) and forms a gap between the first guide wheel (9a) and the first guide wheel (9a) for a single playing card to pass through, and the other first auxiliary pressing wheel (9c1) is arranged above the input end of the second conveyor belt (5) and forms a gap between the second conveyor belt (5) and the second conveyor belt (5) for a single playing card to pass through; The second auxiliary pressing wheel group (9d) comprises two second auxiliary pressing wheels (9d1) arranged at intervals along the running direction of the second conveyor belt (5), wherein one second auxiliary pressing wheel (9d1) is arranged above the output end of the second conveyor belt (5) and forms a gap between the second conveyor belt (5) and the second conveyor belt (5) for a single playing card to pass through, and the other second auxiliary pressing wheel (9d1) is arranged above the second guide wheel (9b) and forms a gap between the second guide wheel (9b) and the second guide wheel (9b) for a single playing card to pass through; The rotation direction of the first guide wheel (9a) is consistent with the running direction of the first conveyor belt (3), the rotation direction of the second guide wheel (9b) is consistent with the running direction of the second conveyor belt (5), the rotation direction of the first auxiliary pressure wheel group (9c) is opposite to the running direction of the first conveyor belt (3), and the rotation direction of the second auxiliary pressure wheel group (9d) is opposite to the running direction of the second conveyor belt (5). Through the clamping effect and directional coordination of the guide wheel, the first auxiliary pressure wheel group (9c) and the second auxiliary pressure wheel group (9d), it is ensured that the separated single playing card can be smoothly transferred from the first conveyor belt (3) to the receiving mechanism (8) via the second conveyor belt (5).

5. The playing card checking machine according to claim 1, characterized in that: The second conveyor belt (5) is provided with a plurality of adsorption holes (5a) penetrating in the thickness direction, and at least one negative pressure suction device (5b) is also provided below the second conveyor belt (5), and an air inlet end (5b1) of the negative pressure suction device (5b) is connected to the adsorption hole (5a). When the second conveyor belt (5) is in operation, the separated single playing cards can be fixed on the second conveyor belt (5) by negative pressure adsorption.

6. The playing card checking machine according to claim 1, characterized in that: At least one pair of vertically rotating and relatively distributed positioning wheels (5b) are attached to both sides of the second conveyor belt (5), and the positioning wheels (5b) are mounted on the frame (1); A circle of grooves (5a1) are formed on the circumference of the positioning wheel (5b), and the width of the grooves (5a1) is adapted to the thickness of the second conveyor belt (5) so as to limit the lateral deviation of the second conveyor belt (5).

7. The playing card checking machine according to claim 1, characterized in that: A concave portion (5c) is formed in the middle section of the second conveyor belt (5), and the concave portion (5c) is formed by adjusting the horizontal direction of the second conveyor belt (5) through multiple transmission shafts, and the area that can be photographed by the high-speed camera (6a) is located downstream of the concave portion (5c); The camera module (6) further comprises a trigger sensor (6b), wherein the trigger sensor (6b) is arranged in the lower recess (5c), and when a single playing card passes through the lower recess (5c), the high-speed camera (6a) can be triggered in time to perform filming, thereby ensuring that an image of each playing card can be accurately captured at a set position.

8. The playing card checking machine according to claim 1, characterized in that: The frame (1) is also provided with a third auxiliary pressure wheel group (5d) located above the second conveyor belt (5), and the third auxiliary pressure wheel group (5d) includes two third auxiliary pressure wheels (5d1) arranged at intervals along the running direction of the second conveyor belt (5), and the two third auxiliary pressure wheels (5d1) are respectively located on both sides of the lower recess (5c), and the third auxiliary pressure wheel (5d1) is a passive rotation structure, and its rotation direction is opposite to the running direction of the second conveyor belt (5), and the contact pressure is used to assist in fixing a single playing card running at high speed to pass through the lower recess (5c), and prevent the playing card from being displaced or warped.

9. The playing card checking machine according to claim 1, characterized in that: The frame (1) is also provided with a lifting pipe (10) pointing to the bottom opening of the discharge bin (2), and the end of the lifting pipe (10) is formed with an inclined surface (10a) that can be inserted into the bottom of the stacked playing cards, and the inclined surface (10a) can partially lift the playing cards at the bottom of the discharge bin (2) to reduce the contact area between the bottom playing cards and the first conveyor belt (3).

10. The playing card checking machine according to any one of claims 1 to 9, characterized in that: The material receiving mechanism (8) comprises a chain (8a) and a plurality of material receiving bins (8b) arranged at intervals on the chain (8a); the transmission direction of the chain (8a) is perpendicular to the running direction of the second conveyor belt (5) so as to facilitate connection with the output end of the second conveyor belt (5); The storage capacity of each of the material receiving bins (8b) is adapted to the number of a single deck of playing cards, and the chain (8a) drives the material receiving bins (8b) to move to the material receiving stations in sequence through intermittent transmission; The data processing system (7) counts the number of single playing cards detected in real time, and when the number of playing cards in the receiving bin (8b) reaches a preset value for a single deck of playing cards, it can control the chain (8a) to step forward one station, driving the next empty receiving bin (8b) to align with the output end of the second conveyor belt (5), so as to realize the storage of playing cards one by one and grouping them by deck.

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