A conveying device used in the printing process of paper packaging boxes

Abstract

The present invention relates to the technical field of paper packaging box printing, and specifically discloses a conveying device used in the printing process of paper packaging boxes, including two brackets and multiple conveying rollers, the multiple conveying rollers are distributed between the two brackets, a bottom plate is installed on the outer wall of one side of the two brackets, a placement plate is arranged above the bottom plate, a driving mechanism is installed on the top of the bottom plate, and an auxiliary guiding mechanism is arranged above the two brackets, the auxiliary guiding mechanism includes two guide plates, and a cleaning mechanism is arranged at the bottom of the two guide plates. In the invention, when the paper packaging box moves to the top of the conveying rollers, the two guide plates are controlled to move in a direction close to each other, so that the spacing between the two guide plates is adapted to the length of the paper packaging box, and the two guide plates can have a guiding and limiting effect on both sides, ensuring that the paper packaging box is located in the middle of the multiple conveying rollers, so that the subsequent printing mechanism can accurately print the pattern on the surface of the paper packaging box.

Description

Technical Field

[0001] The invention relates to the technical field of paper packaging box printing, and in particular to a conveying device used in the printing process of paper packaging boxes. Background Art

[0002] Carton packaging refers to the packaging of products in paper boxes to protect them, facilitate storage and transportation, and promote sales during the circulation process. Carton packaging is a widely used packaging method. Different from wooden box packaging, woven bag packaging, cloth bag packaging, and plastic box packaging, carton packaging has the characteristics of easy material acquisition, light weight, easy printing, easy design and molding, and low cost. It is widely used for sales packaging and transportation packaging of goods. In particular, when agricultural products are sold and transported, in order to ensure the freshness and integrity of agricultural products, packaging boxes are often used to package and transport agricultural products. In order to make the outside of the packaging box display the agricultural products packaged inside, printing equipment is often used to print the corresponding text and patterns on the outside of the corresponding packaging.

[0003] In the printing process of paper packaging boxes in the prior art, the corresponding conveying device is required to sequentially convey the paper packaging boxes to the bottom of the printing mechanism for printing. However, in the process of conveying the paper packaging boxes in the prior art, since there is no corresponding mechanism for guiding and limiting the two sides of the paper packaging boxes above the conveying device, the position of the light paper packaging boxes is easily skewed during the conveying process in the fast conveying device, so that the subsequent printing mechanism cannot accurately print the pattern on the surface of the paper packaging box, which indirectly has an adverse effect on the printing quality of the paper packaging box, making the conveying device in the prior art inconvenient for people to use. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a conveying device used in the printing process of paper packaging boxes.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A conveying device used in a paper packaging box printing process comprises two brackets and a plurality of conveying rollers, wherein the plurality of conveying rollers are evenly distributed between the two brackets, a bottom plate is installed on one side outer wall of the two brackets, a placement plate for temporarily stacking a plurality of paper packaging boxes is arranged above the bottom plate, a driving mechanism for driving the placement plate to move up and down is installed on the top of the bottom plate, auxiliary guiding mechanisms for guiding and limiting the paper packaging boxes at the top positions of the plurality of conveying rollers are arranged above the two brackets, the auxiliary guiding mechanisms comprise two guide plates arranged above the two brackets, and a cleaning mechanism for cleaning the surfaces of the plurality of conveying rollers is arranged at the bottom of the two guide plates.

[0007] Optionally, the driving mechanism includes two fixed rods symmetrically installed on the top of the base plate, the outer walls of the two fixed rods close to the two brackets are provided with first grooves, the first driving screws are installed inside the two first grooves, and the outer wall of the placement plate close to the two fixed rods is symmetrically provided with two first protrusions that cooperate with the outer walls of the first driving screws.

[0008] Optionally, a rotating plate is rotatably mounted on an outer wall of one side of the placement plate close to the two brackets, and the length of the rotating plate is adapted to the length of the plurality of conveying rollers.

[0009] Optionally, a first slide groove is formed on the outer wall of the two brackets on the side away from each other, a first slider is installed inside the two first slide grooves, and a rotating block is installed on the end of the two first sliders away from the first slide groove through a rotating shaft.

[0010] Optionally, a first rectangular plate is provided on the outer wall on the side away from the two guide plates, a first connecting plate is installed on the outer wall on the side away from the first sliding block, a second connecting plate is installed on the outer wall on the side away from the two first rectangular plates, and the two first connecting plates and the second connecting plates are connected by two first electric telescopic rods.

[0011] Optionally, a second groove is formed on the outer wall of the two first rectangular plates adjacent to each other, a second drive screw is installed inside the two second grooves, a second protrusion is installed on the outer wall of the two second drive screws, and a second rectangular plate is installed on the end of the two second protrusions away from the second drive screw.

[0012] Optionally, a third groove is formed on the outer walls of the two second rectangular plates on the adjacent sides, and double-headed screws are installed inside the two third grooves.

[0013] Optionally, two moving blocks are symmetrically installed on the outer walls of the two double-headed screws, and a rotating rod is rotatably installed on the end of the two moving blocks away from the double-headed screws. A mounting block is commonly installed on the end of the two rotating rods away from the moving blocks, and the two guide plates are rotatably connected to the mounting blocks close to them.

[0014] Optionally, a plurality of vacuum suction cups are installed on the top of the two guide plates, and the plurality of vacuum suction cups are connected to an external preset vacuum generator through a hose.

[0015] Optionally, the cleaning mechanism includes a rectangular groove opened at the bottom of the two guide plates, cleaning brushes are installed inside the two rectangular grooves, and multiple second electric telescopic rods are installed inside the two guide plates, and the telescopic ends of the multiple second electric telescopic rods are connected to the cleaning brushes thereunder.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, when a plurality of paper packaging boxes stacked on the top of the placing plate are moved to the top of the conveying roller at the left end in sequence, the two double-headed screws are controlled to drive the two guide plates to move in a direction close to each other on the top of the plurality of conveying rollers, so that the spacing between the two guide plates is adapted to the length of the paper packaging box, so that after the paper packaging box moves to the top of the plurality of conveying rollers, the two guide plates can have a guiding and limiting effect on both sides thereof, ensuring that the paper packaging box is located in the middle position of the plurality of conveying rollers, so as to facilitate the subsequent printing mechanism to accurately print the pattern on the surface of the paper packaging box, and avoid printing deviation, resulting in a low printing yield.

[0018] 2. In the present invention, after stacking multiple paper packaging boxes on the top of the placement plate, the placement plate is controlled to move downward for a distance, and then the two rotating blocks are controlled to drive the two guide plates, the first rectangular plate and other components to rotate in the direction close to the placement plate, until the two guide plates are respectively rotated to the two sides of the multiple paper packaging boxes stacked on the top of the placement plate, and then the two guide plates are controlled to move in the direction close to each other again to push the two sides of the stacked multiple paper packaging boxes, and the rotating plate is controlled to rotate upward to push one side of the multiple paper packaging boxes, so that the multiple paper packaging boxes are stacked more neatly on the top of the placement plate, so that the subsequent multiple paper packaging boxes can be more accurately positioned after falling on the top of the multiple conveying rollers, and avoid the situation where the position deviation of the paper packaging boxes is large after falling on the top of the multiple conveying rollers, and the two guide plates are unable to guide and limit them.

[0019] 3. In the present invention, if a small number of paper packaging boxes have edge wrinkles or bending deformations, in order to avoid these paper packaging boxes being directly transported to the bottom of the printing mechanism for printing, resulting in poor printing effect and poor printing quality, after they move between the two guide plates, the two guide plates continue to move towards each other, so that the two guide plates can clamp and fix the paper packaging boxes with appearance problems, and then with the help of the mutual cooperation between other multiple components, the paper packaging boxes with appearance problems are driven to fall downward to the top of the bottom plate for temporary storage, so that the auxiliary guiding mechanism can also have the effect of removing paper packaging boxes with appearance problems during use, thereby further improving the applicability of the auxiliary guiding mechanism.

[0020] 4. In the present invention, if multiple conveying rollers fail and the paper packaging boxes falling on the top of the multiple conveying rollers cannot be conveyed to the bottom of the printing mechanism, the two guide plates can be directly moved in a direction close to each other to clamp and fix the two ends of the paper packaging boxes falling on the top of the multiple conveying rollers, and the two first sliders can be controlled to move toward the right end inside the corresponding first slide groove, thereby driving the paper packaging boxes clamped and fixed by the two guide plates to be clamped and conveyed toward the right end, so as to facilitate the subsequent printing mechanism to continue printing the paper packaging boxes. After the printing of this batch of paper packaging boxes is completed, the failures of the multiple conveying rollers are repaired to avoid affecting the printing efficiency of this batch of paper packaging boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a conveying device used in the printing process of a paper packaging box proposed by the present invention;

[0023] Figure 2 for Figure 1 The schematic diagram of the structure after the auxiliary guide mechanism rotates 180 degrees;

[0024] Figure 3 It is a schematic diagram of the structure of the placement plate and the bottom plate in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of two first driving screw rods and a placement plate in the present invention;

[0026] Figure 5 is a schematic structural diagram of one of the auxiliary guiding mechanisms in the present invention;

[0027] Figure 6 It is a schematic structural diagram of one of the rotating blocks and the first rectangular plate in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of one of the double-headed screw rods and two rotating rods in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of one of the guide plates and the cleaning mechanism in the present invention.

[0030] In the figure: 1, bracket; 2, conveying roller; 3, bottom plate; 4, placement plate; 5, rotating plate; 6, fixed rod; 7, first slide groove; 8, guide plate; 9, first rectangular plate; 10, first slider; 11, first driving screw rod; 12, first protrusion; 13, rotating block; 14, first connecting plate; 15, first electric telescopic rod; 16, second connecting plate; 17, vacuum suction cup; 18, mounting block; 19, rotating rod; 20, second groove; 21, second driving screw rod; 22, double-headed screw; 23, moving block; 24, third groove; 25, second rectangular plate; 26, second protrusion; 27, cleaning brush; 28, rectangular groove; 29, second electric telescopic rod. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0032] Reference Figure 1-Figure 8 A conveying device used in the printing process of paper packaging boxes includes two brackets 1 and multiple conveying rollers 2, and the multiple conveying rollers 2 are evenly distributed between the two brackets 1. A bottom plate 3 is installed on the outer wall of one side of the two brackets 1, and a placement plate 4 for temporary stacking of multiple paper packaging boxes is arranged above the bottom plate 3. A driving mechanism for driving the placement plate 4 to move up and down is installed on the top of the bottom plate 3. Auxiliary guiding mechanisms for guiding and limiting the paper packaging boxes at the top positions of the multiple conveying rollers 2 are arranged above the two brackets 1. The auxiliary guiding mechanisms include two guide plates 8 arranged above the two brackets 1, and cleaning mechanisms for cleaning the surfaces of the multiple conveying rollers 2 are arranged at the bottom of the two guide plates 8.

[0033] As a technical optimization scheme of the present invention, the driving mechanism includes two fixed rods 6 symmetrically installed on the top of the bottom plate 3, and the outer walls of the two fixed rods 6 on one side close to the two brackets 1 are provided with first grooves, and the first driving screws 11 are installed inside the two first grooves, and the outer wall of the placement plate 4 on one side close to the two fixed rods 6 is symmetrically installed with two first protrusions 12 that match the outer walls of the first driving screws 11. Two first driving devices are preset inside the bottom plate 3, and the output ends of the two first driving devices are respectively connected to the bottom ends of the two first driving screws 11, so that the two first driving screws 11 can be driven to rotate inside the corresponding first grooves, and the two first protrusions 12 can be driven to move up and down inside the corresponding first grooves, so as to drive the placement plate 4 to move up and down above the bottom plate 3; and in actual use, a driving device for driving the stacked multiple paper packaging boxes to move to the top of multiple conveying rollers 2 in sequence for conveying is preset on the top of the placement plate 4, and the driving device is a common mechanism in the prior art for driving the paper packaging boxes to be quickly conveyed to the bottom of the printing device, which will not be described in detail here.

[0034] As a technical optimization solution of the present invention, a rotating plate 5 is rotatably mounted on the outer wall of one side of the placement plate 4 close to the two brackets 1, and the length of the rotating plate 5 is adapted to the length of the plurality of conveying rollers 2. A second driving device is preset on the outer wall of one side of the placement plate 4, and the output end of the second driving device is connected to the rotating part of the rotating plate 5, so as to drive the rotating plate 5 to rotate and adjust at one end of the placement plate 4; after the rotating plate 5 rotates to a horizontal state, it can fill the gap between the placement plate 4 and the two brackets 1, and can also facilitate the subsequent auxiliary guide mechanism to rotate downward.

[0035] As a technical optimization solution of the present invention, the outer walls of the two brackets 1 on the side away from each other are provided with a first slide groove 7, and the first sliders 10 are installed inside the two first slide grooves 7. The ends of the two first sliders 10 away from the first slide grooves 7 are both rotatably installed with a rotating block 13 through a rotating shaft. The first linear motors are preset inside the two first slide grooves 7, and the two first linear motors can respectively drive the two first sliders 10 to move back and forth inside the corresponding first slide grooves 7; the third driving device is preset inside the two first sliders 10, and the output end of the third driving device is connected to the rotating shaft, so as to drive the rotating block 13 to rotate and adjust.

[0036] As a technical optimization solution of the present invention, the outer wall of the side away from the two guide plates 8 is provided with a first rectangular plate 9, the outer wall of the side away from the first slider 10 of the two rotating blocks 13 is installed with a first connecting plate 14, the outer wall of the side away from the two first rectangular plates 9 is installed with a second connecting plate 16, and the two first connecting plates 14 and the second connecting plates 16 are connected by two first electric telescopic rods 15. Since the rotating block 13 and the first rectangular plate 9 are connected by the two first electric telescopic rods 15, the rotating block 13 can drive the first rectangular plate 9 to rotate and adjust together when rotating; and the extension and retraction of the telescopic ends of the two first electric telescopic rods 15 can drive the spacing between the first rectangular plate 9 and the rotating block 13 to be adjusted.

[0037] As a technical optimization solution of the present invention, the outer wall of one side of the two first rectangular plates 9 close to each other is provided with a second groove 20, the inside of the two second grooves 20 is installed with a second driving screw 21, the outer wall of the two second driving screws 21 is installed with a second protrusion 26, and the end of the two second protrusions 26 away from the second driving screw 21 is installed with a second rectangular plate 25. A first servo motor is preset on the outer wall of one side of the two first rectangular plates 9, and the output ends of the two first servo motors are respectively connected to one end of the second driving screw 21 close to them, so that the second driving screw 21 can be driven to rotate inside the second groove 20, so that the second protrusion 26 can move back and forth inside the second groove 20, and drive the second rectangular plate 25 to move back and forth on the outer wall of one side of the first rectangular plate 9.

[0038] As a technical optimization solution of the present invention, the outer wall of one side of the two second rectangular plates 25 close to each other is provided with a third groove 24, and the inside of the two third grooves 24 is installed with a double-headed screw 22. A second servo motor is preset on the outer wall of one side of the two second rectangular plates 25, and the output ends of the two second servo motors are respectively connected to one end of the two double-headed screws 22, so that the two double-headed screws 22 can be driven to rotate inside the corresponding third grooves 24.

[0039] As a technical optimization solution of the present invention, two moving blocks 23 are symmetrically installed on the outer walls of the two double-headed screws 22, and the ends of the two moving blocks 23 away from the double-headed screws 22 are rotatably installed with rotating rods 19, and the ends of the two rotating rods 19 away from the moving blocks 23 are jointly installed with mounting blocks 18, and the two guide plates 8 are rotatably connected to the mounting blocks 18 close to them. When the double-headed screw 22 rotates forward, it can drive the two moving blocks 23 to move in the direction of approaching, and drive the two rotating rods 19 to rotate in the direction of approaching, pushing the mounting block 18 to move in the direction away from the double-headed screw 22; when the double-headed screw 22 is reversed, it can drive the two moving blocks 23 to move in the direction of moving away, and drive the two rotating rods 19 to rotate in the direction of moving away, pulling the mounting block 18 to move in the direction close to the double-headed screw 22.

[0040] As a technical optimization solution of the present invention, multiple vacuum suction cups 17 are installed on the top of the two guide plates 8, and the multiple vacuum suction cups 17 are connected to the external preset vacuum generator through a hose. Through the set vacuum suction cups 17, after the driving device set on the top of the placement plate 4 is damaged, the multiple vacuum suction cups 17 can be driven to rotate toward the placement plate 4 with the help of the auxiliary guide mechanism, so that the multiple vacuum suction cups 17 can adsorb the topmost paper packaging box, and after the auxiliary guide mechanism rotates and resets, the paper packaging box is driven to rotate to the top of the multiple conveying rollers 2 to continue conveying the paper packaging box.

[0041] As a technical optimization solution of the present invention, the cleaning mechanism includes a rectangular groove 28 opened at the bottom of the two guide plates 8, and a cleaning brush 27 is installed inside the two rectangular grooves 28. A plurality of second electric telescopic rods 29 are installed inside the two guide plates 8, and the telescopic ends of the plurality of second electric telescopic rods 29 are connected to the cleaning brush 27 below them. The telescopic ends of the plurality of second electric telescopic rods 29 are extended, which can push the cleaning brush 27 to extend downward from the inside of the rectangular groove 28 and abut against the plurality of conveying rollers 2, so that the cleaning brush 27 can clean the outer walls of the plurality of conveying rollers 2.

[0042] In the present invention, when the user uses the device, after placing multiple folded paper packaging boxes on the top of the placement plate 4 through other conveying or handling equipment on the assembly line, the stacked multiple paper packaging boxes are pushed from bottom to top in sequence to the top of the conveying roller 2 located at the left end with the help of a preset driving device on the top of the placement plate 4, and with the help of the cooperation of multiple conveying rollers 2, the multiple paper packaging boxes are conveyed to the right end in sequence, so that the multiple paper packaging boxes can be moved to the bottom of the printing mechanism in sequence, and the printing mechanism can print patterns on the surface of the paper packaging boxes.

[0043] When the multiple paper packaging boxes stacked on the top of the placement plate 4 move to the top of the conveying roller 2 at the left end in turn, the two double-headed screws 22 can be controlled to rotate, driving the two corresponding moving blocks 23 to move towards each other, and the two corresponding rotating rods 19 are used to push the two mounting blocks 18 and the two guide plates 8 to move towards each other on the top of the multiple conveying rollers 2, so that the spacing between the two guide plates 8 is adapted to the length of the paper packaging box, so that after the paper packaging box moves to the top of the multiple conveying rollers 2, the two guide plates 8 can have a guiding and limiting effect on both sides, ensuring that the paper packaging box is located in the middle position of the multiple conveying rollers 2, so that the subsequent printing mechanism can print the pattern accurately on the surface of the paper packaging box, avoiding printing deviation and resulting in a low printing yield.

[0044] After the plurality of paper packaging boxes are stacked on the top of the placement plate 4, in order to ensure that the subsequent paper packaging boxes can accurately fall on the top of the plurality of conveying rollers 2, the placement plate 4 can be controlled to move downward for a distance first, and then the two rotating blocks 13 can be controlled to drive the two guide plates 8 and the first rectangular plate 9 and other components to rotate in the direction close to the placement plate 4, until the two guide plates 8 are respectively rotated to the two sides of the plurality of paper packaging boxes stacked on the top of the placement plate 4, and then the two double-headed screws 22 are controlled to rotate again so that the two guide plates 8 can move in the direction close to each other, and push the two sides of the stacked plurality of paper packaging boxes. After the rotating plate 5 is controlled to rotate upward to a vertical state, one side of the plurality of paper packaging boxes is pushed, so that the plurality of paper packaging boxes are stacked more neatly on the top of the placement plate 4, so that the subsequent plurality of paper packaging boxes can be more accurately positioned after falling on the top of the plurality of conveying rollers 2, and the situation that the position deviation of the paper packaging boxes is large after falling on the top of the plurality of conveying rollers 2 and the two guide plates 8 are unable to guide and limit them occurs.

[0045] For example, when a small number of paper packaging boxes have edge wrinkles or bending deformations when being transported from the top of the placement plate 4 to the top of multiple conveying rollers 2, in order to avoid these paper packaging boxes being directly transported to the bottom of the printing mechanism for printing, resulting in poor printing effect and poor printing quality, after they move between the two guide plates 8, an industrial camera for detecting the appearance of the paper packaging boxes is preset above the two brackets 1. If the above-mentioned problems are detected in the paper packaging boxes, the multiple conveying rollers 2 can be controlled to stop working, and then continue to move in a direction close to each other with the help of the two guide plates 8, so that the two guide plates 8 can clamp and fix the paper packaging boxes with appearance problems, and then the rotating plate 5 can be controlled to rotate upward to a vertical state, and then the two rotating blocks 13 can be controlled to drive the two first rectangular plates 9 and the guide plate 8 to rotate upward to a vertical state, and the two second driving screws can be controlled. 21 rotates, driving the two second rectangular plates 25, the guide plates 8 and the clamped and fixed paper packaging boxes, which are in a vertical state at this time, to move downward together to a position close to the bottom plate 3, and then control the telescopic ends of the two groups of first electric telescopic rods 15 to extend, and push the two guide plates 8 and the clamped and fixed paper packaging boxes to move to a middle position close to the bottom plate 3, and then control the two guide plates 8 to rotate together to a horizontal state, and drive the clamped and fixed paper packaging boxes to rotate to a state parallel to the bottom plate 3, and after controlling the two guide plates 8 to move in directions away from each other, the paper packaging boxes with appearance problems fall downward to the top of the bottom plate 3 for temporary storage, and then control the guide plates 8 and the rotating block 13 and other components to rotate upward and reset, so that the auxiliary guiding mechanism can also have the effect of removing paper packaging boxes with appearance problems during use, thereby further improving the applicability of the auxiliary guiding mechanism.

[0046] If the driving device on the top of the placement plate 4 fails during use, resulting in the inability to automatically push the stacked multiple paper packaging boxes to the top of the multiple conveying rollers 2 for conveying, Figure 2As shown, the placement plate 4 can be controlled to move downward until it contacts the top of the bottom plate 3. At this time, the two guide plates 8 can be controlled to move toward the approaching direction first, so that the distance between the two guide plates 8 is smaller than the length of the paper packaging box. Then, the two rotating blocks 13 are controlled to drive the two guide plates 8 and other components to rotate 180 degrees together, so that the multiple vacuum suction cups 17 on the top of the two guide plates 8 rotate to the top of the multiple paper packaging boxes stacked on the top of the placement plate 4 and close to each other. The placement plate 4 is controlled to move upward so that after the topmost paper packaging box contacts the multiple vacuum suction cups 17, the multiple vacuum suction cups 17 are pressed against the top of the paper packaging box. The disk 17 can adsorb and fix the topmost paper packaging box, and along with the two rotating blocks 13, drive the two guide plates 8 and other components to rotate and reset, drive the topmost paper packaging box to rotate above the multiple conveying rollers 2, control the multiple vacuum suction cups 17 to release the adsorption of the paper packaging box, and then control the two guide plates 8 to move away from each other and reset, so that the paper packaging box falls to the top of the multiple conveying rollers 2, and continues to be transported by the multiple conveying rollers 2 to the bottom of the printing mechanism for printing processing, so as to avoid the problem of affecting the printing efficiency of the paper packaging box after the driving device fails.

[0047] If multiple conveying rollers 2 malfunction and the paper packaging boxes falling on the top of the multiple conveying rollers 2 cannot be conveyed to the bottom of the printing mechanism, the two guide plates 8 can be directly used to move in a direction close to each other to clamp and fix the two ends of the paper packaging boxes falling on the top of the multiple conveying rollers 2, and the two first sliders 10 can be controlled to move toward the right end inside the corresponding first slide groove 7, thereby driving the paper packaging boxes clamped and fixed by the two guide plates 8 to be clamped and conveyed toward the right end, so as to facilitate the subsequent printing mechanism to continue printing the paper packaging boxes. After the printing work of this batch of paper packaging boxes is completed, the malfunctions of the multiple conveying rollers 2 are repaired to avoid affecting the printing efficiency of this batch of paper packaging boxes.

[0048] When only the last paper packaging box is left among the multiple paper packaging boxes stacked on the placement plate 4, since the bottom of the last paper packaging box is in direct contact with the placement plate 4, a small amount of debris will inevitably be attached to its bottom. In order to prevent the debris attached to its bottom from contaminating the multiple conveying rollers 2, before the last paper packaging box falls on the top of the multiple conveying rollers 2, the two rotating blocks 13 can be controlled to drive the two guide plates 8 and other components to rotate upward to a vertical state, and then the two guide plates 8 are controlled to rotate 180 degrees, and then the two rotating blocks 13 are controlled to drive the two guide plates 8 and other components to rotate downward to reset, and the telescopic ends of the multiple second electric telescopic rods 29 are controlled to extend, driving the two cleaning brushes 27 to extend from the corresponding rectangular grooves 28, so that after the two guide plates 8 are reset, the two cleaning brushes 27 They are respectively located at the top of the two guide plates 8. After controlling the two guide plates 8 to move towards and abut against each other, the placement plate 4 is controlled to move upward to a position higher than the guide plates 8. After the driving device on the top of the placement plate 4 pushes the last paper packaging box to the top of the two guide plates 8, the two guide plates 8 are controlled to move in the direction of moving away from each other and reset, so that the two cleaning brushes 27 take advantage of the situation to clean the debris attached to the bottom of the last paper packaging box. Then the cleaned paper packaging box falls downward to the top of the multiple conveying rollers 2. The two guide plates 8 are controlled to move in the direction of approaching again. After pushing and limiting their positions, they are conveyed to the bottom of the printing mechanism for printing with the help of the multiple conveying rollers 2, which is convenient for automatically cleaning the debris attached to the bottom of the last paper packaging box.

[0049] If the driving device on the top of the placement plate 4 is damaged, after the last paper packaging box is adsorbed and fixed by the multiple vacuum suction cups 17 arranged on the top of the two guide plates 8 mentioned above, the two guide plates 8 are driven by the two rotating blocks 13 to rotate and reset, and the paper packaging box is driven to rotate together to the top of the multiple conveying rollers 2. At this time, the bottom of the paper packaging box rotates to the top, and the two guide plates 8 are controlled to move in a direction away from each other so that they naturally fall on the top of the multiple conveying rollers 2. The telescopic ends of the two groups of first electric telescopic rods 15 are controlled to extend upward, and the two guide plates 8 are driven to move above the multiple conveying rollers 2. Then, the two guide plates 8 are controlled to move in a direction close to each other and abut against each other, and the two cleaning brushes 27 are controlled to extend and abut against the top of the paper packaging box. As the two guide plates 8 are controlled to move in a direction away from each other, the two cleaning brushes 27 are driven to clean the debris attached to the top of the paper packaging box, so that the subsequent printing mechanism can print patterns on its surface.

[0050] After the multiple paper packaging boxes stacked on the top of the placement plate 4 are all transported to the bottom of the printing mechanism through multiple conveyor rollers 2 and printed, there are still a small number of paper packaging boxes with appearance problems temporarily stored on the top of the bottom plate 3. At this time, these paper packaging boxes with appearance problems can be sorted again, and some paper packaging boxes with only a small amount of deformation and creases on the surface are left on the top of the bottom plate 3. By controlling the placement plate 4 to move downward, the bottom of the placement plate 4 is driven to extrude and shape the paper packaging boxes on the top of the bottom plate 3, so that they can avoid the waste of these paper packaging boxes with only minor appearance defects during the printing process without affecting the subsequent printing mechanism to print patterns on their surfaces, thereby improving the utilization rate of these paper packaging boxes.

[0051] After the device is used, the two guide plates 8 and other components are controlled to reset. Figure 1 In the state shown, by controlling the extension of the telescopic ends of the multiple second electric telescopic rods 29, each cleaning brush 27 of the drive chain extends downward from the inside of the corresponding rectangular groove 28 and abuts against the outer walls of the multiple conveying rollers 2, and controlling the two double-headed screws 22 to rotate forward and reversely, the two guide plates 8 and the cleaning brushes 27 at the bottom thereof are driven to move back and forth on the surfaces of the multiple conveying rollers 2, which has a cleaning effect on the debris attached to the surfaces of the multiple conveying rollers 2, and can move inside the corresponding first slide grooves 7 with the help of the two first sliders 10, driving the two cleaning brushes 27 to clean the surfaces of all the conveying rollers 2, thereby facilitating the subsequent conveying of the paper packaging boxes by the multiple conveying rollers 2, and improving the applicability of the two cleaning brushes 27 during use.

[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A conveying device used in a paper packaging box printing process, comprising two brackets (1) and a plurality of conveying rollers (2), characterized in that: The plurality of conveying rollers (2) are evenly distributed between the two brackets (1); a bottom plate (3) is installed on one side outer wall of the two brackets (1); a placement plate (4) for temporarily stacking a plurality of paper packaging boxes is arranged above the bottom plate (3); a driving mechanism for driving the placement plate (4) to move up and down is installed on the top of the bottom plate (3); an auxiliary guiding mechanism for guiding and limiting the paper packaging boxes at the top position of the plurality of conveying rollers (2) is arranged above the two brackets (1); the auxiliary guiding mechanism comprises two guide plates (8) arranged above the two brackets (1); and a cleaning mechanism for cleaning the surfaces of the plurality of conveying rollers (2) is arranged at the bottom of the two guide plates (8); The outer walls of the two brackets (1) on the side away from each other are each provided with a first slide groove (7), the interiors of the two first slide grooves (7) are each provided with a first slider (10), and the ends of the two first sliders (10) away from the first slide groove (7) are each provided with a rotating block (13) rotatably mounted via a rotating shaft; The outer walls of the two guide plates (8) on the side away from each other are each provided with a first rectangular plate (9), the outer walls of the two rotating blocks (13) on the side away from the first sliding block (10) are each provided with a first connecting plate (14), the outer walls of the two first rectangular plates (9) on the side away from each other are each provided with a second connecting plate (16), and the two first connecting plates (14) and the second connecting plates (16) are each connected via two first electric telescopic rods (15); The outer walls of the two first rectangular plates (9) on the sides close to each other are each provided with a second groove (20), the interiors of the two second grooves (20) are each provided with a second drive screw (21), the outer walls of the two second drive screws (21) are each provided with a second protrusion (26), and the ends of the two second protrusions (26) away from the second drive screw (21) are each provided with a second rectangular plate (25); The outer walls of the two second rectangular plates (25) on the adjacent sides are each provided with a third groove (24), and double-headed screws (22) are installed inside the two third grooves (24); Two moving blocks (23) are symmetrically mounted on the outer walls of the two double-headed screws (22); a rotating rod (19) is rotatably mounted on one end of the two moving blocks (23) away from the double-headed screws (22); a mounting block (18) is commonly mounted on one end of the two rotating rods (19) away from the moving blocks (23); and the two guide plates (8) are rotatably connected to the mounting blocks (18) adjacent to them.

2. A conveying device for use in a paper packaging box printing process according to claim 1, characterized in that: The driving mechanism comprises two fixing rods (6) symmetrically mounted on the top of the bottom plate (3); the outer walls of the two fixing rods (6) close to the two brackets (1) are each provided with a first groove; the interiors of the two first grooves are each provided with a first driving screw rod (11); and the outer wall of the placement plate (4) close to the two fixing rods (6) is symmetrically provided with two first protrusions (12) matching the outer walls of the first driving screw rods (11).

3. The conveying device used in the printing process of paper packaging boxes according to claim 1, characterized in that: A rotating plate (5) is rotatably mounted on the outer wall of one side of the placement plate (4) close to the two brackets (1); the length of the rotating plate (5) is adapted to the length of the plurality of conveying rollers (2).

4. The conveying device used in the printing process of paper packaging boxes according to claim 1, characterized in that: A plurality of vacuum suction cups (17) are installed on the top of the two guide plates (8), and the plurality of vacuum suction cups (17) are connected to an external preset vacuum generator via a hose.

5. The conveying device used in the printing process of paper packaging boxes according to claim 1, characterized in that: The cleaning mechanism comprises a rectangular groove (28) opened at the bottom of the two guide plates (8), a cleaning brush (27) being installed inside the two rectangular grooves (28), a plurality of second electric telescopic rods (29) being installed inside the two guide plates (8), and the telescopic ends of the plurality of second electric telescopic rods (29) being connected to the cleaning brush (27) below them.

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