Tin-plated sheet packaging mark coding machine

Abstract

The invention relates to a tinned sheet packaging mark coding machine which comprises a rack, a driver, a frame body, a coding device and a positioning mechanism, a conveying belt mounting groove is horizontally formed in the rack, a conveying belt used for conveying a box body is mounted in the conveying belt mounting groove, the driver is mounted in the middle of the rack, and the coding device is mounted in the middle of the rack. A cylinder is started to drive a push plate to move, a box is attached to a contact frame to position the box in the front-back direction, the cylinder drives the push plate to reset, a driver is started to drive the frame to move downwards, the lower end of a cylinder makes contact with the top of the box firstly, and along with downward movement of the frame, the cylinder makes contact with the box and is relatively static after making contact with the box; due to the fact that the floating plate is fixedly installed on the surface of the column body, the frame body moves downwards and the floating plate does not move, the two clamping plates draw close to each other and surround the box body in the horizontal direction, in the clamping plate rotating process, the push frame moves in the reserved grooves in the clamping plates, the two clamping plates draw close to each other, and the box body is arranged in the middle.

Description

Technical Field

[0001] The invention relates to the technical field of packaging label coding equipment, in particular to a tin-plated sheet packaging label coding machine. Background Art

[0002] In the logistics industry, uniformity and accuracy of box labeling are crucial. A uniform coding position facilitates automated sorting, warehousing, and transportation management. Traditional coding machines rely on manual labor, making it difficult to ensure consistent coding positions each time, especially on high-speed production lines. Tinplate is lightweight, and the boxes used to store small tinplates are also lightweight, making them prone to offset during transportation on conveyor belts. Box position deviations can lead to confusing labels. If the coding position on the product cannot be unified, it will be difficult for subsequent automated identification systems to quickly read information and take inventory of goods.

[0003] For example, an automatic coding machine disclosed in the authorized patent document with application number CN202210522197.X is characterized in that a vertical block is provided on one side of the first motor at the front end of the workbench, and a console is installed at the front end of the vertical block, and a horizontal block is connected to the top of the conveyor belt at one end of the vertical block, and a limit plate is provided between the horizontal block and the conveyor belt, and a coding port is provided on one side of the limit plate at the lower end of the horizontal block, and a coding mechanism is provided inside the horizontal fast above the coding port, and two groups of side plates are spaced apart at the rear end of the workbench, and a lifting mechanism is provided between the two groups of side plates. In the above structure, on the production line, there is a lack of positioning processing for the box body for packaging tinplate, which makes it impossible to unify the subsequent coding position on the box surface. That is, there is the problem mentioned above that if the coding position on the product cannot be unified, it is not convenient for the subsequent automatic identification system to quickly read information and inventory goods. Therefore, we need to provide a tinplate packaging label coding machine. Summary of the Invention

[0004] The object of the present invention is to provide a tinplate packaging label coding machine, which realizes two-dimensional precise positioning of the box through the coordinated action of the preliminary positioning member and the lateral positioning member, ensures that each box is in a uniform position during coding, avoids coding offset or misalignment due to position deviation, performs exactly the same clamping action on the same type of boxes, eliminates human errors and position fluctuations during transportation, greatly improves the repeatability accuracy of the coding position, and solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a tinplate packaging marking coding machine, comprising:

[0006] The platform comprises a driver, a frame, a code printer, and a positioning mechanism. A conveyor belt mounting groove is arranged horizontally inside the platform, and a conveyor belt for transporting boxes is installed in the conveyor belt mounting groove. The driver is installed in the middle of the platform and is used to drive the code printer to adjust its height in the vertical direction. The frame is fixed to the bottom of the driver, and a code printer is installed inside, with the code printer print head facing downward and passing through the bottom of the frame. The positioning structure is used to fix the box containing the small tin-plated sheet to achieve a uniform coding position for the code printer on the box.

[0007] The positioning mechanism includes a preliminary positioning member and a transverse positioning member. The preliminary positioning member is installed in the stand and is used to perform preliminary positioning of the box on the conveyor belt in the front and back directions. The transverse positioning member is installed in the frame and is used to position the box in the left and right directions.

[0008] Preferably, the horizontal positioning member includes a column, a transmission member and a splint. The column is slidably installed at the center of the bottom of the frame. Splints are installed on both sides of the frame through hinges. The transmission member is installed between the splint and the column and is used to move the column to drive the two splints to rotate, so as to achieve horizontal clamping of the box by the two splints.

[0009] Preferably, the transmission member includes a floating plate, a push frame and a reserved groove. The reserved groove is opened in the clamping plate, and the push frame is slidably installed inside. One side of the push frame is fixedly installed on the side of the floating plate, and the floating plate is fixed on the surface of the column.

[0010] Preferably, it also includes an elastic part for resetting the column, the elastic part includes a spring and a guide rod, two springs are provided between the bottom of the floating plate and the bottom of the inner wall of the frame, the tops of the two guide rods are fixed to the bottom of the floating plate, the lower ends pass through the bottom of the frame and extend, and the springs are movably sleeved on the surface of the guide rods.

[0011] Preferably, a contact plate is fixedly mounted on the lower end of the column, and the lower ends of the two guide rods are fixed on the top of the contact plate.

[0012] Preferably, four slots are provided in the contact plate, and rollers are rotatably installed in the four slots. The bottoms of the rollers pass through the bottoms of the slots and are used to fit with the top of the box.

[0013] Preferably, the preliminary positioning member includes a cylinder, a push plate and a resistance member, the push plate is fixedly mounted on the extended end of the cylinder, the cylinder and the resistance member are symmetrically distributed in the stand, and the resistance member is used to resist one side of the box body.

[0014] Preferably, the interference member includes a threaded rod and an interference frame. The interference frame is slidably installed in the platform, and a threaded rod is rotatably installed on the surface. The threaded rod is threadedly installed in the platform.

[0015] Preferably, it also includes a movable part for adjusting the height of the code printer, and the movable part includes an adjusting rod, a driving seat and a slide seat. The slide seat is fixed to the surface of the code printer, and one side is in contact with the inner wall of the frame. The driving seat is fixedly installed on one side of the slide seat, and the adjusting rod is installed on the internal thread of the driving seat. The adjusting rod is rotatably installed in the frame, and the lower end passes through the bottom of the frame and is installed with an adjusting part.

[0016] Preferably, a photoelectric sensor for stopping the conveyor belt is provided in the stand, and the photoelectric sensor is configured as a through-beam photoelectric sensor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention transports boxes containing small tin-plated sheets through a conveyor belt in a stand, and utilizes a driver to drive the height adjustment of the frame, wherein the coding device and the transverse positioning member are both installed in the frame, and the driver can drive the transverse positioning member to perform transverse clamping, while the preliminary positioning member can clamp the box front and back, and the same clamping operation is performed on each box of the same type on the conveyor belt to ensure that the coding position on each box is the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural perspective diagram of the present invention;

[0020] Figure 2 It is a side view of the structure of the present invention;

[0021] Figure 3 The driver of the present invention is a three-dimensional diagram of a motor drive;

[0022] Figure 4 A perspective view of a transverse positioning member of the present invention;

[0023] Figure 5 is a cross-sectional view of a transmission member of the present invention;

[0024] Figure 6 It is a partial structural stereogram of the present invention.

[0025] In the figure: 1. Stand; 2. Driver; 3. Frame; 4. Coder; 5. Positioning mechanism; 51. Preliminary positioning member; 511. Cylinder; 512. Push plate; 513. Interference member; 5131. Threaded rod; 5132. Interference frame; 52. Horizontal positioning member; 521. Column; 522. Transmission member; 5221. Floating plate; 5222. Push frame; 5223. Reserved groove; 523. Clamp; 6. Elastic member; 61. Spring; 62. Guide rod; 7. Contact plate; 8. Slot; 9. Roller; 10. Moving member; 101. Adjusting rod; 102. Drive seat; 103. Slide; 11. Photoelectric sensor. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-6 The present invention provides a technical solution: a tinplate packaging marking coding machine, comprising:

[0028] The stand 1, the driver 2, the frame 3, the code printer 4 and the positioning mechanism 5 are arranged horizontally inside the stand 1. A conveyor belt mounting groove is installed in the conveyor belt mounting groove. The conveyor belt for transporting the box body is installed. The driver 2 is installed in the middle of the stand 1 and is used to drive the code printer 4 to adjust the height in the vertical direction. The frame 3 is fixed to the bottom of the driver 2. The code printer 4 is installed inside, and the print head of the code printer 4 is set downward and passes through the bottom of the frame 3. The positioning structure is used to fix the box body equipped with a small tin-plated sheet to achieve a uniform coding position of the box body by the code printer 4.

[0029] The positioning mechanism 5 includes a preliminary positioning member 51 and a transverse positioning member 52. The preliminary positioning member 51 is installed in the stand 1 and is used to perform preliminary positioning of the box on the conveyor belt in the front and rear directions. The transverse positioning member 52 is installed in the frame 3 and is used to position the box in the left and right directions.

[0030] Specifically, the box containing small tinplate sheets is transported by the conveyor belt in the stand 1, and the height of the frame 3 can be adjusted by the driver 2. The code printer 4 and the transverse positioning member 52 are both installed in the frame 3. The driver 2 can drive the transverse positioning member 52 to clamp the box transversely, and the preliminary positioning member 51 can clamp the box front and back. The same clamping operation is performed on each box of the same type on the conveyor belt to ensure that the coding position on each box is the same;

[0031] Through the coordinated action of the preliminary positioning member 51 and the lateral positioning member 52, the two-dimensional precise positioning of the box is achieved, ensuring that each box is in the same position during coding, avoiding coding offset or misalignment due to position deviation, and performing exactly the same clamping action on the same type of box, eliminating human errors and position fluctuations during transportation, and greatly improving the repeatability accuracy of the coding position.

[0032] The horizontal positioning member 52 includes a column 521, a transmission member 522, and a clamping plate 523. The column 521 is slidably mounted at the bottom center of the frame 3. Clamping plates 523 are mounted on both sides of the frame 3 via hinges. The transmission member 522 is installed between the clamping plates 523 and the column 521 and is used to move the column 521 to drive the two clamping plates 523 to rotate, thereby achieving horizontal clamping of the box by the two clamping plates 523.

[0033] Specifically, the frame 3 moves downward to drive the column 521 to contact the top of the box and then stop. The frame 3 continues to move downward to make the column 521 slide relatively, and the floating plate 5221 is pushed by the transmission member 522 to drive the push frame 5222, so that the push frame 5222 slides in the reserved groove 5223 of the splint 523, so that the two splints 523 rotate and move together, embracing and clamping the box. The horizontal center positioning is achieved through a single driving source, which simplifies the driving system, improves the positioning efficiency, ensures that the box is accurately fixed in the horizontal direction, and avoids lateral deviation of the coding position. Grooves are reserved on both sides of the frame 3 for the movement of the splint 523.

[0034] The transmission member 522 includes a floating plate 5221, a push frame 5222, and a reserved slot 5223. The reserved slot 5223 is provided in the clamping plate 523, and the push frame 5222 is slidably mounted inside the reserved slot. One side of the push frame 5222 is fixedly mounted on the side of the floating plate 5221, and the floating plate 5221 is fixed to the surface of the column 521.

[0035] It is worth noting that the column 521 slides relative to the frame 3, and the floating plate 5221 moves accordingly, driving the push frame 5222 to slide in the reserved groove 5223, converting the linear motion of the column 521 into the rotational motion of the splint 523, thereby realizing the synchronous rotation clamping of the splint 523. The structure is compact and the transmission is stable, ensuring that the clamping force of the splint 523 on the box is uniform, improving the positioning accuracy, and the push frame 5222 and the splint 523 are both made of high-strength materials.

[0036] The frame 521 further includes an elastic member 6 for resetting the column 521. The elastic member 6 includes a spring 61 and a guide rod 62. Two springs 61 are provided between the bottom of the floating plate 5221 and the bottom of the inner wall of the frame 3. The tops of the two guide rods 62 are fixed to the bottom of the floating plate 5221. The lower ends of the two guide rods 62 extend through the bottom of the frame 3. The springs 61 are movably sleeved on the surfaces of the guide rods 62.

[0037] It should be noted that when the frame 3 moves upward, the spring 61 pushes the floating plate 5221 to drive the column 521 to reset, so that the splint 523 opens; the elastic member 6 structure provides a stable reset force to ensure the reliability of repeated action of the positioning mechanism 5, and the guide rod 62 can prevent the column 521 from deviating, thereby extending the service life of the positioning mechanism 5. At the same time, the buffering effect of the spring 61 prevents the splint 523 from rigidly colliding with the box.

[0038] The contact plate 7 is fixedly mounted on the lower end of the column 521, and the lower ends of the two guide rods 62 are fixed on the top of the contact plate 7;

[0039] Among them, the contact plate 7 contacts the top of the box over a large area, so that the column 521 is subjected to more uniform force. The connection between the guide rod 62 and the contact plate 7 enhances the structural stability, improves the stability of the column 521 during the positioning process, disperses the force on the column 521, avoids local stress concentration, ensures the accuracy of lateral positioning, and facilitates the installation and maintenance of the elastic part 6.

[0040] Four slots 8 are provided in the contact plate 7, and rollers 9 are rotatably installed in the four slots 8. The bottom of the roller 9 passes through the bottom of the slot 8 and is used to fit with the top of the box;

[0041] It is worth noting that the movement of the box drives the roller 9 to rotate, converting sliding friction into rolling friction; significantly reducing the friction between the box and the contact plate 7, reducing the wear on the box surface, and at the same time making the box move more smoothly during the positioning process, improving positioning efficiency and equipment compatibility, and can adapt to boxes with different surface materials.

[0042] The preliminary positioning member 51 includes a cylinder 511, a push plate 512 and a resistance member 513. The push plate 512 is fixedly mounted on the extended end of the cylinder 511. The cylinder 511 and the resistance member 513 are symmetrically distributed in the stand 1. The resistance member 513 is used to resist one side of the box.

[0043] It should be noted that starting the cylinder 511 drives the push plate 512 to move, pushing the box toward the resistance member 513, so that the box fits the resistance frame 5132 to achieve front and rear positioning, and then the cylinder 511 drives the push plate 512 to reset, and the front and rear positioning of the box is achieved through simple pneumatic control. The positioning is fast and accurate, and the position of the resistance frame 5132 can be adjusted to adapt to boxes of different lengths, thereby improving the versatility of the equipment.

[0044] The resisting member 513 includes a threaded rod 5131 and a resisting frame 5132. The resisting frame 5132 is slidably mounted in the platform 1, and a threaded rod 5131 is rotatably mounted on the surface. The threaded rod 5131 is threadedly mounted in the platform 1.

[0045] Furthermore, by rotating the threaded rod 5131, the interference frame 5132 is driven to slide in the stand 1 through threaded transmission, and the position of the interference frame 5132 is adjusted. The position of the interference frame 5132 can be flexibly adjusted according to the length of the box, thereby realizing front and rear positioning of boxes of different sizes. The operation is simple, the adaptability of the equipment to boxes of different specifications is enhanced, and the application range of the equipment is expanded.

[0046] It also includes a moving part 10 for adjusting the height of the code printer 4. The moving part 10 includes an adjusting rod 101, a driving seat 102 and a slide 103. The slide 103 is fixed to the surface of the code printer 4, and one side is in contact with the inner wall of the frame 3. The driving seat 102 is fixedly installed on one side of the slide 103. The adjusting rod 101 is installed on the internal thread of the driving seat 102. The adjusting rod 101 is rotatably installed in the frame 3, and the lower end passes through the bottom of the frame 3 and is installed with an adjusting part.

[0047] Specifically, the rotating adjustment part drives the adjustment rod 101 to rotate, and the driving seat 102 drives the slide 103 and the code printer 4 to move up and down along the inner wall of the frame 3 through threaded transmission; this structure realizes the fine adjustment of the height of the code printer 4, and can adjust the coding position according to the change of the box height or different coding requirements, thereby improving the coding flexibility and accuracy and ensuring the coding quality.

[0048] A photoelectric sensor 11 for stopping the conveyor belt is provided in the stand 1, and the photoelectric sensor 11 is configured as a through-beam photoelectric sensor 11;

[0049] Among them, when the box is located between the transmitting end and the receiving end of the photoelectric sensor 11 and blocks the light beam, the sensor triggers a signal to control the conveyor belt drive to stop running, so that the box stops accurately under the code printer 4, realizing automatic detection of the box position and intelligent control of the conveyor belt. After the coding is completed, the positioning mechanism 5 does not clamp the box, and at this time transmits a signal to the conveyor belt to run, which is controlled by the external PLC controller;

[0050] The through-beam photoelectric sensor 11 consists of two parts: a transmitter and a receiver. In the tinplate packaging marking and coding machine, they are installed on both sides of the platform 1 and aligned to ensure that the light beam emitted by the transmitter can accurately reach the receiver. Its specific working principle is as follows:

[0051] Initial state: The transmitter continuously emits infrared or visible light beams, and the receiver is in a state of waiting to receive the beam. At this time, if there is no object blocking the beam, the receiver can stably receive the light emitted by the transmitter. The internal photoelectric elements (such as photodiodes, phototransistors, etc.) generate photocurrent under light. The sensor circuit converts this photocurrent signal into an electrical signal, and the internal processing circuit determines that there is no object. The output is low or remains in the default non-trigger state. The conveyor belt drive continues to run, and the box moves with the conveyor belt;

[0052] Detection process: When a box containing a small tinplate moves on a conveyor belt between the transmitter and receiver, it blocks the light beam emitted by the transmitter, preventing the receiver from receiving the light. Due to the interruption of light, the photocurrent of the photoelectric element at the receiver decreases rapidly or disappears. The sensor's internal processing circuit detects a significant change in the electrical signal, deducing that an object is blocking the light and triggering a signal.

[0053] After the sensor triggers a signal, it outputs a high level or a specific electrical signal change. This signal is transmitted via wires to the control circuit of the conveyor belt drive, which is also connected to an external PLC controller. After receiving the signal, the control circuit controls the conveyor belt drive to stop according to a preset program, so that the box stops precisely under the code printer 4, preparing for subsequent positioning and coding operations.

[0054] When the coding operation is completed, the driver 2 drives the frame 3 to move upward, the positioning mechanism 5 releases the box, and the PLC controller controls the conveyor belt drive to restart, and the next box continues to be conveyed. At this time, if there is no object blocking the transmitting end and the receiving end, the sensor returns to the initial state, the receiving end receives the light beam again, and the above detection process is repeated

[0055] The driver 2, code printer 4, conveyor belt cylinder 511 and photoelectric sensor 11 involved in this application are all implemented using existing mature technologies, connected to an external PLC controller and power supply, and are conventional technical means in this field, so their specific circuit connections, control logic and work processes are not described in detail.

[0056] The threaded connections in this application all have a self-locking function, and the surface is coated with an anti-rust coating and a dust-proof coating. Even if dust adheres to the threaded connections, it can still be used normally. The surface of the conveyor belt is smooth and has no protrusions, so that the friction between the bottom of the box and the conveyor belt is smaller, and it is more labor-saving when the splint 523 clamps the box.

[0057] In the present application, the driver 2 can be driven by a hydraulic rod or a motor to achieve height adjustment of the frame 3.

[0058] Example 1

[0059] This device transmits a box containing small tinplate sheets through a conveyor belt. Since a photoelectric sensor 11 is provided in the stand 1, the photoelectric sensor 11 includes a transmitter and a receiver. The photoelectric sensor 11 is connected to the conveyor belt drive motor wire and is connected to an external PLC controller. When the box is located between the transmitter and the receiver, it blocks the light beam and triggers a signal, and the conveyor belt stops running. At this time, the box is located below the code printer 4, and the positioning mechanism 5 is used to standardize the positioning of the box. Specifically:

[0060] First, start the cylinder 511 to drive the push plate 512 to move, and the box body is fitted with the contact frame to position the box body in the front and rear directions. The cylinder 511 drives the push plate 512 to reset, and start the driver 2. When the driver 2 is a hydraulic rod, start the hydraulic rod to drive the frame body 3 to move down. First, the lower end of the column 521 contacts the top of the box body. As the frame body 3 moves down, the column 521 is relatively still after contacting the box body. Because the floating plate 5221 is fixedly installed on the surface of the column 521, the frame body 3 moves down while the floating plate 5221 does not move, so that the two clamping plates 523 are close to each other and horizontally embrace the box body. During the rotation of the clamping plate 523, the push frame 5222 is located in the reserved groove 5223 in the clamping plate 523 and moves. The two clamping plates 523 are close to each other and the box body is set in the center.

[0061] Among them, the lower end of the column 521 is provided with a contact disk 7, and a roller 9 is rotatably installed in the contact disk 7. The movement of the box will drive the roller 9 to rotate, reducing the friction on the movement of the box. Under the single driving source of the driver 2, the box is horizontally centered. Then the coder 4 is started to mark the top of the box. After completion, the driver 2 drives the frame 3 to move upward. Under the action of the elastic member 6, the two clamping plates 523 are opened. Among them, the upward movement of the frame 3 causes the spring 61 to push the floating plate 5221 and the column 521 to move, thereby opening the two clamping plates 523.

[0062] The code printer 4 can also be fine-tuned to adjust the distance between the bottom of the code printer 4 and the top of the box. The adjusting rod 101 is driven to rotate by rotating the adjusting portion, and the adjusting rod 101 is threadedly mounted with a driving seat 102. The driving seat 102 is fixed on the slide 103, which can drive the driving seat 102, the slide 103 and the code printer 4 to adjust their height together. One side of the slide 103 fits the inner wall of the frame 3, and the surface of the code printer 4 is movably connected to the bottom of the frame 3. The code printer 4 will not rotate, and a rectangular groove is provided on the top of the box for a reserved hole for the cable, and the reserved length of the cable meets the moving range of the code printer 4.

[0063] Example 2

[0064] The box body is located below the code printer 4, and the box body is standardizedly positioned by the positioning mechanism 5. Specifically, the cylinder 511 is first started to drive the push plate 512 to move, and the box body is fitted with the contact frame to position the box in the front and rear directions. The cylinder 511 drives the push plate 512 to reset, and the driver 2 is started. The driver 2 can be driven by the motor to rotate the rod body. The surface of the rod body is threaded with a lifting frame, and the lifting frame is fixedly installed with the frame body 3, driving the frame body 3 to move down. First, the lower end of the column 521 contacts the top of the box body. As the frame body 3 moves down, the column 521 is relatively stationary after contacting the box body. Because the floating plate 5221 is fixedly installed on the surface of the column 521, the frame body 3 moves down while the floating plate 5221 does not move, so that the two clamping plates 523 are close to each other, and the box body is horizontally embraced. During the rotation of the clamping plate 523, the push frame 5222 is located in the reserved groove 5223 in the clamping plate 523, and the two clamping plates 523 are close to each other, and the box body is set in the center;

[0065] Among them, a contact disk 7 is provided at the lower end of the column 521, and a roller 9 is rotatably installed in the contact disk 7. The movement of the box will drive the roller 9 to rotate, reducing the friction on the movement of the box. Under the single driving source of the driver 2, the box is horizontally centered, and then the code printer 4 is started to code the top of the box. After completion, the driver 2 drives the frame 3 to move upward, and under the action of the elastic member 6, the two splints 523 are opened. Among them, when the frame 3 moves upward, the spring 61 pushes the floating plate 5221 and the column 521 to move, and the two splints 523 are opened.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tinplate packaging marking coding machine, characterized in that: include: A stand (1), a driver (2), a frame (3), a code printer (4) and a positioning mechanism (5); a conveyor belt mounting groove is horizontally arranged inside the stand (1); a conveyor belt for transporting a box body is installed in the conveyor belt mounting groove; the driver (2) is installed in the middle of the stand (1) and is used to drive the code printer (4) to adjust its height in the vertical direction; the frame (3) is fixed to the bottom of the driver (2), and a code printer (4) is installed inside, and the print head of the code printer (4) is arranged downward and passes through the bottom of the frame (3); the positioning structure is used to fix the box body equipped with a small tin-plated sheet to achieve a uniform coding position of the box body by the code printer (4); The positioning mechanism (5) comprises a preliminary positioning member (51) and a transverse positioning member (52). The preliminary positioning member (51) is installed in the platform (1) and is used for preliminary positioning of the box on the conveyor belt in the front and rear directions. The transverse positioning member (52) is installed in the frame (3) and is used for positioning the box in the left and right directions.

2. The tinplate packaging marking coding machine according to claim 1, characterized in that: The transverse positioning member (52) comprises a column (521), a transmission member (522) and a clamping plate (523); the column (521) is slidably mounted at the bottom center of the frame (3); clamping plates (523) are mounted on both sides of the frame (3) via hinges; the transmission member (522) is mounted between the clamping plates (523) and the column (521) and is used to move the column (521) and drive the two clamping plates (523) to rotate, so as to achieve horizontal clamping of the box by the two clamping plates (523).

3. The tinplate packaging marking coding machine according to claim 2, characterized in that: The transmission member (522) includes a floating plate (5221), a push frame (5222) and a reserved groove (5223). The reserved groove (5223) is provided in the clamping plate (523), and the push frame (5222) is slidably installed inside. One side of the push frame (5222) is fixedly installed on the side of the floating plate (5221), and the floating plate (5221) is fixed on the surface of the column (521).

4. The tinplate packaging marking and coding machine according to claim 3, characterized in that: The invention also includes an elastic member (6) for resetting the column (521), the elastic member (6) including a spring (61) and a guide rod (62), two springs (61) are provided between the bottom of the floating plate (5221) and the bottom of the inner wall of the frame (3), the tops of the two guide rods (62) are fixed to the bottom of the floating plate (5221), the lower ends of the two guide rods (62) pass through the bottom of the frame (3) and extend, and the springs (61) are movably sleeved on the surfaces of the guide rods (62).

5. The tinplate packaging marking and coding machine according to claim 4, characterized in that: A contact plate (7) is fixedly mounted on the lower end of the column (521), and the lower ends of the two guide rods (62) are fixed on the top of the contact plate (7).

6. The tinplate packaging marking and coding machine according to claim 5, characterized in that: Four troughs (8) are provided in the contact plate (7), and rollers (9) are rotatably installed in the four troughs (8). The bottom of the rollers (9) passes through the bottom of the troughs (8) and is used to fit with the top of the box.

7. The tinplate packaging marking and coding machine according to claim 1, characterized in that: The preliminary positioning member (51) comprises a cylinder (511), a push plate (512) and a resisting member (513); the push plate (512) is fixedly mounted on the extended end of the cylinder (511); the cylinder (511) and the resisting member (513) are symmetrically distributed within the stand (1); and the resisting member (513) is used to resist one side of the box body.

8. The tinplate packaging marking and coding machine according to claim 7, characterized in that: The interference member (513) comprises a threaded rod (5131) and an interference frame (5132); the interference frame (5132) is slidably mounted in the platform (1); a threaded rod (5131) is rotatably mounted on the surface; and the threaded rod (5131) is threadedly mounted in the platform (1).

9. The tinplate packaging marking code printer according to claim 1, characterized in that: The invention also includes a moving part (10) for adjusting the height of the code printer (4), wherein the moving part (10) includes an adjusting rod (101), a driving seat (102) and a slide seat (103). The slide seat (103) is fixed on the surface of the code printer (4), and one side thereof is in contact with the inner wall of the frame (3). The driving seat (102) is fixedly mounted on one side of the slide seat (103). The adjusting rod (101) is mounted on the inner thread of the driving seat (102). The adjusting rod (101) is rotatably mounted in the frame (3), and the lower end thereof passes through the bottom of the frame (3) and is mounted with an adjusting portion.

10. The tinplate packaging marking and coding machine according to claim 1, characterized in that: A photoelectric sensor (11) for stopping the conveyor belt is provided in the stand (1), and the photoelectric sensor (11) is configured as a beam-type photoelectric sensor (11).

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