A playing card sorting and testing machine

Abstract

The present invention relates to the technical field of playing card defect detection, and discloses a playing card sorting detection machine, including a detection table, a feeding mechanism is arranged on the top of the detection table, the feeding mechanism includes a card box fixedly installed on the detection table, a rectangular groove is opened on the card box, and the width of the rectangular groove is adapted to the length of the playing card, and a material guide table is arranged at one side opening of the rectangular groove. The playing card sorting detection machine changes the position of the rotating block through a four-axis mechanical arm, so that the rotating block is close to the card face of the first playing card, the rubber suction cup on the first moving cylinder is close to the first playing card, and the air pump is turned on to draw air from the air guide groove. When the rubber suction cup is attached to the first playing card, the internal low-pressure area will attract the playing card, so that the rubber suction cup of the first playing card is sucked, and then the first playing card is sent to the transmission area along the material guide table, and the second moving cylinder sends the second playing card to the transmission area, so that the playing card group is efficiently and orderly transported for subsequent detection.

Description

Technical Field

[0001] The invention relates to the technical field of playing card defect detection, and in particular to a playing card sorting detection machine. Background Art

[0002] Standard playing cards are made of multiple layers of paper material, usually three layers, including two printed surfaces and a layer of adhesive in the middle. The surface is usually coated with special materials (such as polish and UV water-based varnish) to improve the wear resistance and smoothness of the card surface according to customized requirements and improve the user experience.

[0003] At present, modern playing card production lines usually use mechanical components to fan the playing cards in a ring shape, and then use optical instruments to detect defects. High-resolution cameras and advanced image processing technology are used to check the quality of the playing cards (identify card surface defects). For example, a playing card sorting and detection machine disclosed in publication number CN221485192U fanns the playing cards through a fanning component, and drives the sliding rod to rotate through a second driving member, so that the sliding rod drives the optical sensor to detect the fanned playing cards.

[0004] In the actual detection process, by pressing and rotating the card stack to open the ring, relative sliding may occur between the cards during rotation, resulting in partial overlap of the cards when unfolded. Especially when the pressing force varies with the height of the card stack (unstable), uneven spreading is more likely to occur, requiring manual assistance for naked eye recognition, which is more troublesome and affects the detection efficiency and accuracy. Summary of the invention

[0005] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a playing card sorting detection machine, which can effectively solve the problem in the prior art that when playing cards are unfolded through a circular fan, partial overlap occurs, uneven spreading occurs easily, and manual assistance for naked eye recognition is required, which is relatively troublesome and affects the detection efficiency and detection accuracy.

[0006] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a playing card sorting and testing machine, comprising a testing platform, a feeding mechanism is arranged on the top of the testing platform, the feeding mechanism comprises a card placing box fixedly mounted on the testing platform, a rectangular groove is opened on the card placing box, and the width of the rectangular groove is adapted to the length of the playing cards, a material guide platform is arranged at one side opening of the rectangular groove, and a suction mechanism is arranged on one side of the feeding mechanism; The suction mechanism includes a four-axis robotic arm installed on the detection table, and the four-axis robotic arm is located on one side of the card box, a rotating block is fixedly installed on the R-axis end of the four-axis robotic arm, a first moving cylinder and a second moving cylinder are slidably installed on the wall of the rotating block, and the second moving cylinder is located obliquely above the first moving cylinder, and rubber suction cups are fixedly installed on the ends of the first moving cylinder and the second moving cylinder away from the rotating block, and a "C"-shaped air guide groove is opened in the rotating block, and the air guide groove is connected to the air suction end of the air pump through a hose.

[0007] Furthermore, a first elastic member is connected between the first movable cylinder and the inner wall of the rotating block, and a second elastic member is connected between the second movable cylinder and the inner wall of the rotating block. When the rotating block is in a horizontal state, the first movable cylinder is in an extended state, and the second movable cylinder is in a retracted state, and the first elastic member and the second elastic member are both in a natural state of their original length.

[0008] Furthermore, the outer surfaces of the first movable cylinder and the second movable cylinder are both connected with connecting ears, a connecting rod is arranged between the two connecting ears, a block is rotatably connected to the inner wall of the rotating block through a fixed rod, and the inner side of the connecting rod is slidably connected to the block.

[0009] Furthermore, a limit block is fixedly installed at one side opening of the rectangular groove, and there are two limit blocks symmetrically arranged, the inner sides of the limit blocks are bonded with anti-slip pads, a push block is slidably connected in the rectangular groove, and a pushing member is arranged in the detection table.

[0010] Furthermore, the pushing member includes a moving rod that movably passes through the wall of the detection platform, and the number of moving rods is not less than two, one end of the moving rod is connected to the outer wall of the pushing block, and the other end of the moving rod is connected to a fixed block, and the fixed block is elastically connected to the inner wall of the detection platform.

[0011] Furthermore, the pushing block extends 0.5 mm beyond the top end of the material guiding platform, and a protrusion is provided on the material guiding platform.

[0012] Furthermore, a conveyor belt is provided at the rear end of the material guiding platform, and a visual inspection instrument for detecting defects of playing cards is installed on the inspection platform.

[0013] Furthermore, the suction mechanism is provided with an adjustment mechanism, which includes a connecting ring fixedly mounted in the inner cavities of the first movable cylinder and the second movable cylinder, a T-shaped rod movably penetrates the connecting ring, and a contact ball is integrally formed and connected to one end of the T-shaped rod close to the rubber suction cup.

[0014] Furthermore, an air inlet groove is provided on the outer wall of the T-shaped rod. When the contact ball contacts the playing cards, the air inlet groove is communicated with the air guide groove. One end of the T-shaped rod away from the rubber suction cup is elastically connected to the outer wall of the connecting ring.

[0015] Furthermore, a control panel is provided on the inspection platform, the four-axis robot arm and the conveyor belt are connected to the control panel through wire control, and the visual inspection instrument and the control panel are connected using a wireless communication protocol for data transmission.

[0016] Beneficial Effects Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention puts a deck of playing cards to be tested into a rectangular groove, changes the position of a rotating block through a four-axis mechanical arm, so that the rotating block is close to the card face of the first playing card, the rubber suction cup on the first moving cylinder is close to the first playing card, and the air pump is turned on to extract air from the air guide groove, so that a low-pressure area is formed inside the rubber suction cup. When the rubber suction cup is attached to the first playing card, the internal low-pressure area will attract the playing card, so that the rubber suction cup of the first playing card is sucked, and then the first playing card is sent to the transmission area along the material guide table, and the second moving cylinder sends the second playing card to the transmission area, the air pump stops working to put down the playing card adsorbed by the rubber suction cup, and the rotating block rotates clockwise to reset, and the first moving cylinder and the second moving cylinder repeat the above steps to efficiently and orderly transport the deck of playing cards for subsequent testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A schematic diagram of the placement of playing cards according to an embodiment of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of a material guide table according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a rotating block according to an embodiment of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of a rotating block according to an embodiment of the present invention; Figure 6 For the embodiment of the present invention Figure 5 A schematic diagram of the structure with a partial enlargement at the center; Figure 7It is a schematic cross-sectional structural diagram of the first moving cylinder according to an embodiment of the present invention; Figure 8 It is a schematic structural diagram of an embodiment of the present invention when the air inlet groove and the air guide groove are connected.

[0019] The numbers in the figure represent respectively: 1. detection table; 2. feeding mechanism; 21. card box; 22. rectangular groove; 23. material guide table; 231. raised part; 24. limit block; 25. pushing block; 26. pushing member; 261. moving rod; 262. fixed block; 3. suction mechanism; 31. four-axis robot arm; 32. rotating block; 33. first moving cylinder; 34. second moving cylinder; 35. rubber suction cup; 36. air guide groove; 37. first elastic member; 38. second elastic member; 39. connecting ear; 310. connecting rod; 311. block; 4. conveyor belt; 5. visual inspection instrument; 6. adjustment mechanism; 61. connecting ring; 62. T-shaped rod; 63. contact ball; 64. air intake groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] Example 1, reference Figure 1-6 , which is the first embodiment of the present invention, provides a playing card sorting and testing machine, including a testing table 1, a feeding mechanism 2 is arranged on the top of the testing table 1, the feeding mechanism 2 includes a card box 21 fixedly mounted on the testing table 1, a rectangular groove 22 is opened on the card box 21, and the width of the rectangular groove 22 is adapted to the length of the playing cards, a material guide table 23 is arranged at one side opening of the rectangular groove 22, and a suction mechanism 3 is arranged on one side of the feeding mechanism 2.

[0023] The suction mechanism 3 includes a four-axis robot arm 31 installed on the detection table 1, and the four-axis robot arm 31 is located on one side of the card box 21. A rotating block 32 is fixedly installed at the R-axis end of the four-axis robot arm 31. A first moving cylinder 33 and a second moving cylinder 34 are slidably installed on the wall of the rotating block 32, and the second moving cylinder 34 is located obliquely above the first moving cylinder 33. A rubber suction cup 35 is fixedly installed at one end of the first moving cylinder 33 and the second moving cylinder 34 away from the rotating block 32. A "C"-shaped air guide groove 36 is opened in the rotating block 32, and the air guide groove 36 is connected to the air suction end of the air pump through a hose.

[0024] Specifically, the four-axis robot arm 31 is composed of four rotating joints (divided into four axes: X, Y, Z, and R). These joints can be driven by motors, hydraulics, or pneumatics. They are controlled by inputting electrical signals through a preset program to control the movement of the joints. Each joint can rotate within a range, thereby changing the shape of the four-axis robot arm 31 and the position of the rotating block 32.

[0025] Specifically, the rubber suction cup 35 may preferably be a parallel ribbed suction cup. The parallel ribs help to evenly distribute the pressure applied by the suction cup to the playing cards, thereby reducing local pressure on the playing cards and thus reducing the risk of damaging the playing cards during the detection process.

[0026] Specifically, the playing card set to be tested is placed in the rectangular groove 22, and the position of the rotating block 32 is changed by the four-axis robot 31 so that the rotating block 32 is close to the face of the first playing card, and the rubber suction cup 35 on the first moving cylinder 33 is close to the first playing card, and the air pump is turned on to extract air from the air guide groove 36, so that a low-pressure area is formed inside the rubber suction cup 35. When the rubber suction cup 35 is attached to the first playing card, the internal low-pressure area will attract the playing card, and the rubber suction cup 35 absorbs the first playing card, and then the first playing card is sent to the conveying area along the material guide table 23, and the second moving cylinder 34 sends the second playing card to the conveying area, and the air pump stops working and puts down the rubber suction cup. The playing cards adsorbed by the disk 35 are reset by rotating the rotating block 32 counterclockwise for a quarter of a turn, and the first moving cylinder 33 and the second moving cylinder 34 repeat the above steps to efficiently and orderly transport the playing card group for subsequent detection; the rubber suction cup 35 changes its coordinate position following the rotating block 32, and adsorbs the central area of ​​the playing cards each time. Since the second moving cylinder 34 is located obliquely above the first moving cylinder 33, when the two rubber suction cups 35 both adsorb the playing cards, there is a distance between the two playing cards. Therefore, when the two playing cards are placed in the transmission area at the same time, the two playing cards will not overlap or block the card faces, so that the subsequent optical instrument can efficiently detect the card faces of the playing cards.

[0027] Reference Figure 3 A first elastic member 37 is connected between the first movable cylinder 33 and the inner wall of the rotating block 32, and a second elastic member 38 is connected between the second movable cylinder 34 and the inner wall of the rotating block 32. When the rotating block 32 is in a horizontal state, the first movable cylinder 33 is in an extended state, and the second movable cylinder 34 is in a retracted state. The first elastic member 37 and the second elastic member 38 are both in their original length and natural state.

[0028] Specifically, the first elastic member 37 and the second elastic member 38 can preferably be springs or spring sheets, so that the first movable cylinder 33 and the second movable cylinder 34 can automatically reset when they are away from the adsorbed playing cards; because the first movable cylinder 33 is longer than the initially exposed portion of the second movable cylinder 34, during the counterclockwise rotation and reset of the first movable cylinder 33 and the second movable cylinder 34, the second movable cylinder 34 cannot contact the first playing card in the rectangular groove 22, and the second movable cylinder 34 will not adsorb the first playing card and slide it out obliquely upward during the rotation and reset process, so as to avoid affecting the subsequent process of extracting the playing card from the rectangular groove 22.

[0029] Reference Figure 4 and Figure 5 The outer surfaces of the first movable cylinder 33 and the second movable cylinder 34 are both connected with connecting ears 39, and the inner side of the connecting ears 39 is fixedly connected with a short shaft, a connecting rod 310 is arranged between the two connecting ears 39, and the inner side of the connecting rod 310 is slidably connected to the short shaft, and a block 311 is rotatably connected to the inner wall of the rotating block 32 through a fixed rod, and the inner side of the connecting rod 310 is slidably connected to the block 311.

[0030] Specifically, after the first movable cylinder 33 absorbs the first playing card, the first playing card moves along the outer surface of the guide table 23, pushing the first movable cylinder 33 to retract into the rotating block 32. Under the connection action of the connecting ear 39 and the connecting rod 310, the second movable cylinder 34 simultaneously extends out of the rotating block 32, so that the rubber suction cup 35 at the end of the second movable cylinder 34 is close to the second playing card.

[0031] Example 2, reference Figure 1-6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that a limit block 24 is fixedly installed at one side opening of the rectangular groove 22, and there are two limit blocks 24 symmetrically arranged, and the inner sides of the limit blocks 24 are bonded with anti-slip pads, a push block 25 is slidably connected in the rectangular groove 22, and a pushing member 26 is arranged in the detection table 1.

[0032] Specifically, the pusher 26 can be a cylinder that pushes only one playing card forward each time, but a cylinder with precise stroke control is required to ensure that the distance pushed each time is equal to the thickness of a playing card (0.3mm to 0.5mm), and a sensor, such as a photoelectric sensor or a proximity sensor, is installed at the place where the playing card deck is placed to detect the position of the playing cards. When the sensor detects that the first playing card has moved, the cylinder is triggered to act. The cost of precisely controlling the cylinder and the sensor is high, and the system is relatively complex, requiring a precise control system and calibration, and is not suitable for detection occasions that require rapid or batch processing of playing cards.

[0033] Reference Figure 6The pushing member 26 includes a moving rod 261 that is movable and penetrates the wall of the detection platform 1, and the number of moving rods 261 is not less than two, one end of the moving rod 261 is connected to the outer wall of the pushing block 25, and the other end of the moving rod 261 is connected to a fixed block 262, and the fixed block 262 is elastically connected to the inner wall of the detection platform 1; the pushing block 25 extends 0.5mm from the top of the guide platform 23, and a protrusion 231 is provided on the guide platform 23; a conveyor belt 4 is provided at the tail end of the guide platform 23, and a visual inspection instrument 5 for detecting defects in playing cards is installed on the detection platform 1.

[0034] Specifically, the plurality of movable rods 261 are arranged to linearly push the same pushing block 25, so that even when elastic fatigue occurs to one of the movable rods 261, the pushing block 25 can always tend to approach the limiting block 24; when it is necessary to place a deck of playing cards, the pushing member 26 is pulled backward, and then the deck of playing cards to be tested is placed horizontally between the limiting block 24 and the pushing block 25 (compared with vertical placement, horizontal placement can reduce the horizontal moving distance required for each playing card, thereby shortening the testing time of the playing card deck); since the pushing member 26 extends 0.5 mm out of the top of the guide platform 23, and the thickness of a playing card is only 0.3 mm to 0.5 mm, only one playing card is completely suspended on the top of the guide platform 23 at a time, so that only the first playing card is drawn out each time, and the second playing card will not slide out together.

[0035] Specifically, the playing card deck can also be placed in the rectangular slot 22 in a stacked state (i.e., all the cards are stacked face down to form a neat deck), and the two sides of the playing card deck are limited by the limit blocks 24 and the push blocks 25; at this time, the movement trajectory of the four-axis robot 31 changes from a quarter-turn reciprocating operation to moving the rubber suction cup 35 to the top of the playing card deck and then moving down to absorb the first playing card. In order to avoid relative sliding of the second playing card, the rubber suction cup 35 needs to move upward away from the second playing card and then move to the conveying area, and the movement trajectory of the four-axis robot 31 becomes complicated; it is impossible to absorb two or more playing cards each time, which makes the entire detection time longer; the operation programming of the four-axis robot 31 needs to be modified according to the total thickness of each batch of playing cards to be detected, and it is impossible to ensure that the first playing card to be taken out in the rectangular slot 22 maintains the same coordinates, and the entire process will become more complicated than the method of placing the playing card deck horizontally and rotating the four-axis robot 31 a quarter of a turn.

[0036] The remaining structures are the same as those of Example 1.

[0037] Example 3, reference Figure 1-8, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that in order to avoid uneven suction when both rubber suction cups 35 are in the open state but only one rubber suction cup 35 is working, it is necessary to ensure that there is sufficient suction when one rubber suction cup 35 is adsorbed with the playing cards, that is, the other rubber suction cup 35 has already adsorbed the playing cards or the other rubber suction cup 35 cannot be affected by the negative pressure of the air pump.

[0038] Reference Figure 7 and Figure 8 The suction mechanism 3 is provided with an adjustment mechanism 6, which includes a connecting ring 61 fixedly mounted in the inner cavities of the first movable cylinder 33 and the second movable cylinder 34, a T-shaped rod 62 is movably provided in the connecting ring 61, and one end of the T-shaped rod 62 close to the rubber suction cup 35 is integrally formed with a contact ball 63; an air inlet groove 64 is provided on the outer wall of the T-shaped rod 62, and when the contact ball 63 contacts the playing cards, the air inlet groove 64 is connected to the air guide groove 36, and the end of the T-shaped rod 62 away from the rubber suction cup 35 is elastically connected to the outer wall of the connecting ring 61.

[0039] Specifically, the contact ball 63 contacts the playing cards before the rubber suction cup 35. As the rotating block 32 approaches the playing card deck, the contact ball 63 is squeezed into the rubber suction cup 35 by the squeezing force of the card surface, so that the T-shaped rod 62 moves into the air guide groove 36. The air inlet groove 64 moves synchronously with the T-shaped rod 62, so that the air inlet groove 64 is connected to the air guide groove 36. A low-pressure area can be formed inside the rubber suction cup 35 to adsorb the playing cards, while the other rubber suction cup 35 that does not contact the playing cards cannot form a low-pressure area, ensuring that there is sufficient suction when adsorbing the playing cards.

[0040] Reference Figure 1 A control panel is provided on the inspection table 1, the four-axis robot arm 31 and the conveyor belt 4 are connected to the control panel through wire control, and the visual inspection instrument 5 and the control panel use a wireless communication protocol for data transmission.

[0041] Specifically, the control panel includes a preset module, a control module, a transmission module and a processing module; the operator physically touches the buttons or switches on the control panel to convert the operator's physical actions into electrical signals, and then transmits the electrical signals to the controller (such as a PLC or a microcontroller) through a signal line, and transmits the operator's instructions to the controller. The controller sends the control signal to the driver of the four-axis robot arm 31 through a wire. The signal can be an analog signal (such as 0-10V or 4-20mA) or a digital signal (such as PWM pulse width modulation).

[0042] Specifically, the controller of the control panel sends a control signal to a driver (such as a motor) of the conveyor belt 4 through a wire, supplies power to the driver of the conveyor belt 4 through the wire, and controls its speed and direction.

[0043] Specifically, the visual detector 5 is a type of optical instrument used to detect defects on the surface of playing cards on the conveyor belt 4. It usually includes a camera, a processor, a memory and other sensors. The visual detector 5 collects image data, processes and analyzes it through an internal processor, extracts the information to be transmitted, and encapsulates the collected data into a format that complies with the wireless communication protocol. For example, if the TCP / IP protocol is used, the data will be encapsulated into an IP data packet and sent to the control panel for data analysis and processing.

[0044] The remaining structure is the same as that of Example 2.

[0045] In summary of Examples 1-3, the working principle of the present invention is as follows: the deck of playing cards to be tested is placed horizontally between the limit block 24 and the push block 25, the rotating block 32 is moved close to the face of the first playing card by the four-axis robot arm 31, the rubber suction cup 35 on the first moving cylinder 33 is close to the first playing card, the contact ball 63 is squeezed by the pressure of the card face and retracted into the rubber suction cup 35, so that the T-shaped rod 62 moves into the air guide groove 36, the air inlet groove 64 moves synchronously with the T-shaped rod 62, so that the air inlet groove 64 is connected with the air guide groove 36, the air pump is turned on to extract air from the air guide groove 36, and a low pressure can be formed inside the rubber suction cup 35. The first playing card is adsorbed in the pressure area and then moved along the guide table 23. When it moves to the raised portion 231, the first moving cylinder 33 retracts into the rotating block 32, and the second moving cylinder 34 simultaneously extends out of the rotating block 32, so that the rubber suction cup 35 at the end of the second moving cylinder 34 is close to the second playing card to complete the adsorption of the second playing card. The rotating block 32 rotates to send the two playing cards to the conveyor belt 4, the air pump stops working and puts down the two playing cards, and the rotating block 32 rotates counterclockwise to reset, and the above steps are repeated to transport the playing card group in the rectangular slot 22 to the visual inspection instrument 5 in an orderly manner.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A playing card sorting detection machine, comprising a detection table (1), characterized in that: A feeding mechanism (2) is arranged on the top of the detection platform (1), and the feeding mechanism (2) comprises a card placing box (21) fixedly mounted on the detection platform (1), a rectangular groove (22) is provided on the card placing box (21), and the width of the rectangular groove (22) is adapted to the length of the playing cards, a material guide platform (23) is arranged at an opening on one side of the rectangular groove (22), and a suction mechanism (3) is arranged on one side of the feeding mechanism (2); The suction mechanism (3) comprises a four-axis mechanical arm (31) mounted on the detection platform (1), and the four-axis mechanical arm (31) is located on one side of the card box (21). A rotating block (32) is fixedly mounted on the R-axis end of the four-axis mechanical arm (31). A first moving cylinder (33) and a second moving cylinder (34) are slidably mounted on the wall of the rotating block (32), and the second moving cylinder (34) is located obliquely above the first moving cylinder (33). A rubber suction cup (35) is fixedly mounted on one end of the first moving cylinder (33) and the second moving cylinder (34) away from the rotating block (32). A "C"-shaped air guide groove (36) is provided in the rotating block (32), and the air guide groove (36) is connected to the air extraction end of the air pump through a hose.

2. The playing card sorting detection machine according to claim 1, characterized in that: A first elastic member (37) is connected between the first movable cylinder (33) and the inner wall of the rotating block (32), and a second elastic member (38) is connected between the second movable cylinder (34) and the inner wall of the rotating block (32). When the rotating block (32) is in a horizontal state, the first movable cylinder (33) is in an extended state, the second movable cylinder (34) is in a retracted state, and the first elastic member (37) and the second elastic member (38) are both in a natural state of their original length.

3. The playing card sorting detection machine according to claim 2, characterized in that: The outer surfaces of the first movable cylinder (33) and the second movable cylinder (34) are both connected with connecting ears (39), a connecting rod (310) is arranged between the two connecting ears (39), a block (311) is rotatably connected to the inner wall of the rotating block (32) via a fixed rod, and the inner side of the connecting rod (310) is slidably connected to the block (311).

4. The playing card sorting detection machine according to claim 1, characterized in that: A limit block (24) is fixedly installed at an opening on one side of the rectangular groove (22), and two limit blocks (24) are symmetrically arranged. The inner sides of the limit blocks (24) are both bonded with anti-slip pads. A push block (25) is slidably connected in the rectangular groove (22), and a push member (26) is arranged in the detection table (1).

5. The playing card sorting detection machine according to claim 4, characterized in that: The pushing member (26) comprises a moving rod (261) movably penetrating the wall of the detection platform (1), and the number of the moving rods (261) is not less than two, one end of the moving rod (261) is connected to the outer wall of the pushing block (25), and the other end of the moving rod (261) is connected to a fixed block (262), and the fixed block (262) is elastically connected to the inner wall of the detection platform (1).

6. The playing card sorting detection machine according to claim 4, characterized in that: The pushing block (25) extends 0.5 mm beyond the top end of the material guiding platform (23), and a protruding portion (231) is provided on the material guiding platform (23).

7. The playing card sorting detection machine according to claim 1, characterized in that: A conveyor belt (4) is provided at the rear end of the material guide table (23), and a visual inspection instrument (5) for detecting defects in playing cards is installed on the inspection table (1).

8. The playing card sorting detection machine according to claim 3, characterized in that: The suction mechanism (3) is provided with an adjustment mechanism (6), the adjustment mechanism (6) comprising a connecting ring (61) fixedly mounted in the inner cavities of the first movable cylinder (33) and the second movable cylinder (34), a T-shaped rod (62) movably extending through the connecting ring (61), and a contact ball (63) integrally formed and connected to one end of the T-shaped rod (62) close to the rubber suction cup (35).

9. The playing card sorting detection machine according to claim 8, characterized in that: An air inlet groove (64) is provided on the outer wall of the T-shaped rod (62). When the contact ball (63) contacts the playing card, the air inlet groove (64) is connected to the air guide groove (36). An end of the T-shaped rod (62) away from the rubber suction cup (35) is elastically connected to the outer wall of the connecting ring (61).

10. The playing card sorting detection machine according to claim 7, characterized in that: The inspection platform (1) is provided with a control panel, the four-axis robot arm (31) and the conveyor belt (4) are both connected to the control panel via wires, and the visual inspection instrument (5) and the control panel are connected using a wireless communication protocol for data transmission.

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