Automatic printing equipment for packaging box

Abstract

The invention relates to the technical field of packaging boxes, and discloses automatic packaging box printing equipment which comprises a supporting frame, and a centering mechanism, two adjusting mechanisms and a sweeping mechanism are arranged on the supporting frame; the centering mechanism comprises a first fixing plate fixedly connected to the bottom of the supporting frame, two second rotating shafts are rotationally connected to the bottom of the first fixing plate, a motor frame is fixedly connected to the bottom of the first fixing plate, and a motor is fixedly connected to the inner wall of the motor frame; an output shaft of the motor is fixedly connected with a second rotating shaft located on the left side through a coupler, the outer walls of the two second rotating shafts are fixedly connected with two first gears, the two first gears are meshed with each other, and the bottom of the first fixing plate is rotationally connected with two third rotating shafts. By arranging the centering mechanism, the problems that the packaging box is inconvenient to center or fix, the distance between the packaging box and printing equipment is not constant due to the fact that the position of the packaging box is not fixed during printing, and the printing effect is not good are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging boxes, in particular to automatic printing equipment for packaging boxes. Background Art

[0002] With the continuous development of industrial automation technology, the packaging and printing industry urgently needs a printing equipment that can achieve uninterrupted automatic printing, improve printing quality and efficiency, and adapt to packaging boxes of different specifications. Therefore, the development of an automatic printing equipment for packaging boxes has become the key to solving the current industry pain points and promoting the transformation and upgrading of the packaging and printing industry.

[0003] However, the existing uninterrupted automatic printing equipment for packaging boxes is not convenient for centering or fixing the position of the packaging boxes during use. The uncertain position of the packaging boxes during printing will make the distance between the packaging boxes and the printing equipment uncertain, resulting in poor printing effect. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic printing device for packaging boxes. By setting a centering mechanism, it solves the problem that it is inconvenient to center or fix the position of the packaging box. The uncertain position of the packaging box during printing will make the distance between the packaging box and the printing device uncertain, resulting in poor printing effect.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an automatic printing device for packaging boxes, including a support frame, wherein the support frame is provided with a centering mechanism, two adjustment mechanisms and a cleaning mechanism; the centering mechanism includes a fixed plate 1 fixedly connected to the bottom of the support frame, the bottom of the fixed plate 1 is rotatably connected to two rotating shafts 2, the bottom of the fixed plate 1 is fixedly connected to a motor frame, the inner wall of the motor frame is fixedly connected to a motor, the output shaft of the motor is fixedly connected to the rotating shaft 2 located on the left side through a coupling, the outer walls of the two rotating shafts 2 are fixedly connected to two gears 1, the two gears 1 are meshed, and the fixed The bottom of plate one is rotatably connected to two rotating shafts three, the outer walls of the two rotating shafts three are fixedly connected to gear two, the two gear twos are respectively meshed with two gear ones, the outer walls of the two rotating shafts three are fixedly connected to half gears, the bottom of the fixed plate one is fixedly connected to several limiting rings one, several limiting rings one are slidably connected to two racks, the two racks are respectively meshed with two half gears; the adjusting mechanism is arranged above the support frame and is fixedly connected to the rack; the cleaning mechanism is arranged on the front side of the support frame and is transmission connected to the rotating shaft two.

[0007] Furthermore, the adjustment mechanism includes a connecting rod arranged on the right side of the support frame, the connecting rod is fixedly connected to the rack, the left side of the connecting rod is fixedly connected to a slide rod 1, a plurality of limit grooves are provided on the slide rod 1, the outer wall of the slide rod 1 is slidably connected to a hollow rod, the hollow rod is slidably connected to a slide rod 2, the bottom of the slide rod 2 passes through the hollow rod, and the bottom of the slide rod 2 passes through the corresponding limit groove.

[0008] Furthermore, the top of the sliding rod 2 is fixedly connected to a handle 1, the outer wall of the sliding rod 2 is provided with a spring 1, the top of the spring 1 is fixedly connected to the handle 1, the bottom of the spring 1 is fixedly connected to the hollow rod, and the left side of the hollow rod is fixedly connected to a fixed plate 2.

[0009] Furthermore, several sliding rods three are slidably connected to the fixed plate two, several of the sliding rods three are fixedly connected to the buffer plate on their left sides, several of the sliding rods three are sleeved with springs two on their outer walls, several of the springs two are fixedly connected to the buffer plate on their left sides, and several of the springs two are fixedly connected to the fixed plate two on their right sides.

[0010] Furthermore, the cleaning mechanism includes a fixed frame fixedly connected to the top of the support frame, a slide groove is opened on the fixed frame, and two rotating shafts are provided on the fixed frame. The rotating shaft on the right side is rotatably connected to the fixed frame, and the outer walls of the two rotating shafts are fixedly connected to cleaning rollers. The outer wall of the rotating shaft on the left side is fixedly connected to a limiting ring 2, and the limiting ring 2 is slidably connected to the slide groove.

[0011] Furthermore, the outer walls of the two rotating shafts are fixedly connected to gear three, and the two rotating shafts are rotatably connected to hinged rods, and the two hinged rods are hinged on the sides close to each other, and the two hinged rods are rotatably connected to rotating shaft four, and the outer wall of rotating shaft four is fixedly connected to gear four, and gear four is engaged with the two gear threes.

[0012] Furthermore, the rear side of the fixing frame is rotatably connected to a threaded rod, the rear side of the threaded rod is fixedly connected to a second handle, the outer wall of the threaded rod is threadedly connected to a slider, and the slider is rotatably connected to the rotating shaft four.

[0013] Furthermore, a fixed plate three is fixedly connected to the right side of the support frame, a rotating shaft five is rotatably connected to the fixed plate three, a belt group one is provided on the outer walls of the rotating shaft five and the rotating shaft two, and a belt group two is provided on the outer walls of the rotating shaft five and the rotating shaft.

[0014] Furthermore, a support plate is fixedly connected to the right side of the support frame, a printing device is provided on the top of the support plate, two rotating shafts 1 are rotatably connected to the support frame, the right side of the rotating shaft 1 located on the front side extends to the outside of the support frame, the outer walls of the two rotating shafts 1 are fixedly connected to round rollers, the outer walls of the two round rollers are provided with conveyor belts, the right side of the support frame is fixedly connected to motor 1, and the output shaft of motor 1 is fixedly connected to the rotating shaft 1 located on the front side through a coupling.

[0015] The present invention has the following beneficial effects:

[0016] When the two gears 1 rotate, the corresponding gear 2 rotates, and when the two gears 2 rotate, the two shafts 3 also rotate accordingly. At this time, the two shafts 3 rotate in opposite directions. When the shaft 3 rotates, the two half gears also rotate accordingly. When the half gears rotate, they drive the rack on the meshing side to slide on the corresponding limit ring 1, so that the rack will drive the connecting rod, the sliding rod 1, the hollow rod, the buffer plate and the fixed plate 2 to reciprocate. At this time, the effect of centering the packaging box can be achieved, and the accuracy and stability of the movement are guaranteed. Compared with some simple transmission methods, the packaging box can be adjusted to the center position more efficiently, the adjustment time and error are reduced, and the production efficiency and product quality are improved.

[0017] 2. The present invention provides an adjustment mechanism. After the cleaning roller is adjusted, the two buffer plates are adjusted according to the size of the packaging box. When adjusting, the handle 1 can be lifted. After the handle 1 is lifted, the slide bar 2 will also move accordingly. When the handle 1 moves upward, the spring 1 will be pulled by the handle 1 and the hollow rod. As the slide bar 2 continues to move, it will break away from the limit groove on the slide bar 1. At this time, the hollow rod can be slid on the slide bar 1. After the hollow rod is slid to a suitable position, the handle 1 is released. At this time, the spring 1 will pull the handle 1 downward. When the spring 1 pulls the handle 1, the slide bar 2 will also move accordingly, and then the slide bar 2 will slide into the corresponding limit groove again, limiting the slide bar 1 and the hollow rod again. At this time, the adjustment is achieved. The effect is that when the rack slides, the connecting rod will move with it, and at this time, the fixed plate 2 will move through the sliding rod 1 and the hollow rod. When the fixed plate 2 moves, the sliding rod 3, the buffer plate and the spring 2 will move. After the buffer plate contacts the packaging box, it will be squeezed by the fixed plate 2 318. After the buffer plate is squeezed by the fixed plate 2 318, it will squeeze the sliding rod 3 and the spring 2, and then the spring 2 will shrink. After the squeezing, the spring 2 will shrink, and the sliding rod 3 will extend to the right side of the fixed plate 2, thereby achieving a buffering effect, enhancing the compatibility of the equipment with products of different specifications, avoiding the problem of replacing specific components or complex debugging due to changes in the size of the packaging box, and reducing the use cost and maintenance difficulty of the equipment.

[0018] 3. The present invention sets a cleaning mechanism. When printing on a box, the distance between the two cleaning rollers is adjusted according to the volume of the packaging box. When adjusting, the handle 2 is turned. When the handle 2 is turned, the threaded rod will also rotate accordingly. When the threaded rod rotates, the slider will also slide accordingly. When the slider slides, it will move the rotating shaft 4. When the rotating shaft 4 moves, it will push the rotating shaft on the left through the hinged rod on the left. When the rotating shaft on the left is pushed, the left cleaning roller will also be pushed. In this way, the distance between the cleaning rollers can be adjusted. After the adjustment is completed, the motor on the motor frame is started. At this time, the rotating shaft 2 will drive the rotating shaft 5 on the fixed plate 3 through the belt group 1 to move. When the gear three on the right rotates, it will drive the gear four on the shaft four to rotate, and when the gear four rotates, it will drive the gear three on the other side to rotate. At this time, the two shafts will rotate at the same time, and the cleaning roller will also rotate when the two shafts rotate, so the packaging box can be cleaned, thereby achieving the effect of cleaning the packaging box, and being able to fit the surface of the packaging box more comprehensively and closely, ensuring that all parts of the packaging box can be fully cleaned, avoiding cleaning dead corners, and significantly improving the cleaning effect.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention as a whole;

[0023] Figure 3 This is a schematic diagram of the partial structure of the belt assembly 1 of the present invention;

[0024] Figure 4 It is a partial cross-sectional structural schematic diagram of the centering mechanism of the present invention;

[0025] Figure 5 It is a partial cross-sectional structural schematic diagram of the cleaning mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the partial structure of the threaded rod of the present invention;

[0027] Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure of A in the middle;

[0028] Figure 8 For the present invention Figure 3 Schematic diagram of the enlarged structure of B;

[0029] Figure 9 For the present invention Figure 2 Schematic diagram of the enlarged structure of C in the middle;

[0030] Figure 10 For the present invention Figure 2 Schematic diagram of the enlarged structure of D in the middle.

[0031] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0032] In the figure: 1. Support frame; 101. Support plate; 102. Printing device; 103. Rotating shaft 1; 104. Round roller; 105. Conveyor belt; 106. Motor 1; 2. Centering mechanism; 211. Fixing plate 1; 212. Rotating shaft 2; 213. Motor frame; 214. Motor; 215. Gear 1; 216. Rotating shaft 3; 217. Gear 2; 218. Half gear; 219. Limiting ring 1; 2110. Rack; 3. Adjusting mechanism; 311. Connecting rod; 312. Sliding rod 1; 313. Limiting groove; 314. Hollow rod; 315. Sliding rod 2; 3 16. Handle one; 317. Spring one; 318. Fixed plate two; 319. Slide bar three; 3110. Buffer plate; 3111. Spring two; 4. Cleaning mechanism; 411. Fixed frame; 412. Slide groove; 413. Rotating shaft; 414. Cleaning roller; 415. Limiting ring two; 416. Gear three; 417. Articulated rod; 418. Rotating shaft four; 419. Gear four; 4110. Threaded rod; 4111. Handle two; 4112. Slide bar; 4113. Fixed plate three; 4114. Rotating shaft five; 4115. Belt group one; 4116. Belt group two. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figures 1-10 As shown, the present invention is an automatic printing device for packaging boxes, comprising a support frame 1, on which a centering mechanism 2, two adjustment mechanisms 3 and a cleaning mechanism 4 are provided;

[0035] The centering mechanism 2 includes a fixed plate 211 fixedly connected to the bottom of the support frame 1, the bottom of the fixed plate 211 is rotatably connected to two rotating shafts 212, the bottom of the fixed plate 211 is fixedly connected to a motor frame 213, the inner wall of the motor frame 213 is fixedly connected to a motor 214, the output shaft of the motor 214 is fixedly connected to the rotating shaft 212 on the left side through a coupling, the outer walls of the two rotating shafts 212 are fixedly connected to two gears 215, the two gears 215 are meshed, and the fixed plate The bottom of the first plate 211 is rotatably connected to two third rotating shafts 216. The outer walls of the two third rotating shafts 216 are fixedly connected to gears 217. The two gears 217 are respectively meshed with the two first gears 215. The outer walls of the two third rotating shafts 216 are fixedly connected to half gears 218. The bottom of the fixed plate 1 211 is fixedly connected to four limiting rings 1 219. The four limiting rings 1 219 are slidably connected to two racks 2110. The two racks 2110 are respectively meshed with the two half gears 218.

[0036] The adjusting mechanism 3 is arranged above the supporting frame 1 and is fixedly connected to the rack 2110 ; the cleaning mechanism 4 is arranged on the front side of the supporting frame 1 and is transmission-connected to the second rotating shaft 212 .

[0037] The right side of the right support frame 1 is fixedly connected to a support plate 101, and a printing device 102 is arranged on the top of the support plate 101. Two rotating shafts 103 are rotatably connected to the support frame 1, and the right side of the rotating shaft 103 located at the front side extends to the outside of the support frame 1. The outer walls of the two rotating shafts 103 are fixedly connected to round rollers 104, and the outer walls of the two round rollers 104 are provided with conveyor belts 105. The right side of the support frame 1 is fixedly connected to a motor 106, and the output shaft of the motor 106 is fixedly connected to the rotating shaft 103 located at the front side through a coupling.

[0038] By setting up the centering mechanism 2, the accuracy and stability of the movement are guaranteed. Compared with some simple transmission methods, the packaging box can be adjusted to the center position more efficiently, reducing adjustment time and errors, and improving production efficiency and product quality.

[0039] The adjusting mechanism 3 includes a connecting rod 311 arranged on the right side of the support frame 1, the connecting rod 311 is fixedly connected to the rack 2110, the left side of the connecting rod 311 is fixedly connected to a sliding rod 1 312, a plurality of limiting grooves 313 are provided on the sliding rod 1 312, the outer wall of the sliding rod 1 312 is slidably connected to a hollow rod 314, a sliding rod 2 315 is slidably connected to the hollow rod 314, the bottom of the sliding rod 2 315 passes through the hollow rod 314, the bottom of the sliding rod 2 315 passes through the corresponding limiting groove 313, the top of the sliding rod 2 315 is fixedly connected to a handle 1 316, and the sliding rod 2 3 15 is provided with a spring 1 317 on the outer wall, the top of the spring 1 317 is fixedly connected to the handle 1 316, the bottom of the spring 1 317 is fixedly connected to the hollow rod 314, the left side of the hollow rod 314 is fixedly connected to the fixing plate 2 318, four sliding rods 319 are slidably connected to the fixing plate 2 318, the left sides of the four sliding rods 319 are fixedly connected to the buffer plate 3110, the outer walls of the four sliding rods 319 are all provided with a spring 2 3111, the left sides of the four springs 2 3111 are fixedly connected to the buffer plate 3110, and the right sides are fixedly connected to the fixing plate 2 318.

[0040] By providing the adjustment mechanism 3, the compatibility of the device with products of different specifications is enhanced, the problem of needing to replace specific components or complicated debugging due to changes in the size of the packaging box is avoided, and the use cost and maintenance difficulty of the device are reduced.

[0041] The cleaning mechanism 4 includes a fixed frame 411 fixedly connected to the top of the support frame 1, a slide groove 412 is provided on the fixed frame 411, and two rotating shafts 413 are provided on the fixed frame 411. The rotating shaft 413 on the right is rotatably connected to the fixed frame 411, and the outer walls of the two rotating shafts 413 are fixedly connected to the cleaning roller 414, and the outer wall of the rotating shaft 413 on the left is fixedly connected to the limiting ring 2 415, and the limiting ring 2 415 is slidably connected to the slide groove 412; the outer walls of the two rotating shafts 413 are fixedly connected to the gear 3 416, and the two rotating shafts 413 are rotatably connected to the hinge rod 417, and the two hinge rods 417 are hinged on the side close to each other, and the two hinge rods 417 are rotatably connected to the rotating shaft 418, and the outer wall of the rotating shaft 418 is fixedly connected to the gear 419. Wheel four 419 is engaged with two gear threes 416; the rear side of the fixed frame 411 is rotatably connected to the threaded rod 4110, the rear side of the threaded rod 4110 is fixedly connected to the handle two 4111, the outer wall of the threaded rod 4110 is threadedly connected to the slider 4112, and the slider 4112 is rotatably connected to the rotating shaft four 418; the right side of the support frame 1 is fixedly connected to the fixed plate three 4113, the fixed plate three 4113 is rotatably connected to the rotating shaft five 4114, the outer walls of the rotating shaft five 4114 and the rotating shaft two 212 are provided with a belt group one 4115, the outer walls of the rotating shaft five 4114 and the rotating shaft 413 are provided with a belt group two 4116, the belt group includes a pulley and a belt matched with it, the pulley is fixedly connected to its corresponding rotating shaft, and when the pulley rotates, it drives the corresponding rotating shaft to rotate.

[0042] By providing the cleaning mechanism 4, it is possible to fit the surface of the packaging box more comprehensively and closely, ensuring that all parts of the packaging box can be fully cleaned, avoiding cleaning dead corners, and thus significantly improving the cleaning effect.

[0043] During use, the distance between the two cleaning rollers 414 is first adjusted according to the volume of the packaging box. To adjust the distance, turn the second handle 4111. When the second handle 4111 is turned, the threaded rod 4110 also rotates. As the threaded rod 4110 rotates, the slider 4112 also slides. When the slider 4112 slides, it moves the fourth rotating shaft 418. When the fourth rotating shaft 418 moves, it pushes the left rotating shaft 413 through the left hinge rod 417. When the left rotating shaft 413 is pushed, the left cleaning roller 414 is also pushed, thereby adjusting the distance between the cleaning rollers 414. Because when the rotating shaft 413 is pushed, the fourth rotating shaft 418 moves to the left due to the restriction of the right rotating shaft 413, the threaded rod 4110 is rotatably connected to the moving block in the groove of the fixed frame 411. When the moving block slides in the groove, it slides the threaded rod 4110 in the slide groove, thereby pushing the left rotating shaft 413.

[0044] After the adjustment is completed, the motor 214 on the motor frame 213 is started. At this time, the rotating shaft 212 will drive the rotating shaft 5 4114 on the fixed plate 3 4113 to rotate through the belt group 1 4115. When the rotating shaft 5 4114 rotates, the rotating shaft 413 on the right side will be rotated through the belt group 2 4116. When the right rotating shaft 413 rotates, the gear 3 416 on its outer wall will rotate accordingly. When the gear 3 416 on the right side rotates, it will drive the gear 419 on the rotating shaft 418 to rotate. When the gear 419 rotates, it will drive the gear 3 416 on the other side to rotate. At this time, the two rotating shafts 413 will rotate at the same time. When the two rotating shafts 413 rotate, the cleaning roller 414 will also rotate accordingly, so that the packaging box can be cleaned, thereby achieving the effect of cleaning the packaging box.

[0045] After the cleaning roller 414 is adjusted, the two buffer plates 3110 are adjusted according to the size of the packaging box so that the distance between the two buffer plates 3110 matches the size of the packaging box. When adjusting, the handle 1 316 can be lifted. After the handle 1 316 is lifted, the slide bar 2 315 will also move accordingly. When the handle 1 316 moves upward, the spring 1 317 will be pulled by the handle 1 316 and the hollow rod 314. As the slide bar 2 315 continues to move, it will disengage from the limit slot 313 on the slide bar 1 312. At this time, the empty box can be opened. When the handle 1 316 is pulled downwardly, the spring 1 317 will pull the handle 1 316 downwardly, and the slide 2 315 will also move accordingly, and then the slide 2 315 will slide into the corresponding limit groove 313 again, limiting the slide 1 312 and the hollow rod 314 again. At this time, the buffer plate 3110 is adjusted, and the two buffer plates 3110 are extended to the same distance.

[0046] Then the motor 214 and the motor 1 106 on the motor frame 213 can be started. When the motor 214 rotates, the rotating shaft 212 on the left side will also rotate accordingly. When the rotating shaft 2 212 on the left side rotates, the gear 1 215 on the left side will also rotate accordingly. When the gear 1 215 on the left side rotates, the gear 1 215 on the right side will rotate accordingly. When the two gears 1 215 rotate, the corresponding gear 2 217 will rotate with them. When the two gears 2 217 rotate, the two rotating shafts 3 216 will also rotate with them. At this time, the two rotating shafts 3 216 rotate in opposite directions. When the rotating shaft 3 216 rotates, the two half gears 218 will also rotate with them. When the half gear 218 rotates, it will bring the rack 2110 on the meshing side to slide on the corresponding limiting ring 1 219, so that the rack 2110 will bring the connecting rod 31 1. The sliding rod 1 312, the hollow rod 314, the buffer plate 3110 and the fixed plate 2 318 make reciprocating motions, which can achieve the effect of centering the packaging box. When the rack 2110 slides, the connecting rod 311 will move with it. At this time, the fixed plate 2 318 will move through the sliding rod 1 312 and the hollow rod 314. When the fixed plate 2 318 moves, the sliding rod 3 319, the buffer plate 3110 and the spring 2 3111 will move. After the buffer plate 3110 contacts the packaging box, it will be squeezed by the fixed plate 2 318. After being squeezed by the fixed plate 2 318, the buffer plate 3110 will squeeze the sliding rod 3 319 and the spring 2 3111. Then the spring 2 3111 will contract, and the sliding rod 3 319 will extend to the right side of the fixed plate 2 318, thereby also achieving a buffering effect.

[0047] As the motor 106 rotates, the shaft 103 will also rotate. When the shaft 103 rotates, the round roller 104 will also rotate. When the round roller 104 rotates, it will move the conveyor belt 105. When the conveyor belt 105 moves, the packaging box on it will also move. As the conveyor belt 105 continues to move, the packaging box will reach the printing device 102. At this time, the printing device 102 will print the packaging box. The conveyor belt 105 will stop moving during printing. The printing device 102 here is the British Lingda LT710-G612 small character inkjet printer, which has the following features: it can print 1-4 lines, the printing speed is 450m / min, the printing height is 1-15mm, it can print a variety of fonts, languages, logos, characters, etc., it is suitable for food, medicine and other industries, and can print characters, barcodes, QR codes and other content.

[0048] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic printing device for packaging boxes, characterized by: It comprises a support frame (1), on which a centering mechanism (2), two adjustment mechanisms (3) and a cleaning mechanism (4) are provided; The centering mechanism (2) comprises a fixing plate (211) fixedly connected to the bottom of the support frame (1); the bottom of the fixing plate (211) is rotatably connected to two rotating shafts (212); the bottom of the fixing plate (211) is fixedly connected to a motor frame (213); the inner wall of the motor frame (213) is fixedly connected to a motor (214); the output shaft of the motor (214) is fixedly connected to the rotating shaft (212) on the left side via a coupling; the outer walls of the two rotating shafts (212) are fixedly connected to two gears (215); the two gears (215) are meshed with each other; the fixing plate (211) is fixedly connected to a motor frame (213); the inner wall of the motor frame (213) is fixedly connected to a motor (214); the output shaft of the motor (214) is fixedly connected to the rotating shaft (212) on the left side via a coupling; the outer walls of the two rotating shafts (212) are fixedly connected to two gears (215); the two gears (215) are meshed with each other; The bottom of the plate 1 (211) is rotatably connected to two rotating shafts 3 (216), the outer walls of the two rotating shafts 3 (216) are fixedly connected to gear 2 (217), the two gear 2 (217) are respectively meshed with the two gear 1s (215), the outer walls of the two rotating shafts 3 (216) are fixedly connected to half gears (218), the bottom of the fixed plate 1 (211) is fixedly connected to a plurality of limiting rings 1 (219), the plurality of limiting rings 1 (219) are slidably connected to two racks (2110), the two racks (2110) are respectively meshed with the two half gears (218); The adjustment mechanism (3) is arranged above the support frame (1) and is fixedly connected to the rack (2110); The cleaning mechanism (4) is arranged on the front side of the support frame (1) and is in transmission connection with the second rotating shaft (212).

2. The automatic printing device for packaging boxes according to claim 1, characterized in that: The adjustment mechanism (3) includes a connecting rod (311) arranged on the right side of the support frame (1), the connecting rod (311) is fixedly connected to the rack (2110), the left side of the connecting rod (311) is fixedly connected to a sliding rod (312), a plurality of limiting grooves (313) are provided on the sliding rod (312), the outer wall of the sliding rod (312) is slidably connected to a hollow rod (314), the hollow rod (314) is slidably connected to a sliding rod (315), the bottom of the sliding rod (315) passes through the hollow rod (314), and the bottom of the sliding rod (315) passes through the corresponding limiting groove (313).

3. The automatic printing device for packaging boxes according to claim 2, characterized in that: The top of the second slide bar (315) is fixedly connected to a handle (316), the outer wall of the second slide bar (315) is provided with a spring (317), the top of the spring (317) is fixedly connected to the handle (316), the bottom of the spring (317) is fixedly connected to the hollow rod (314), and the left side of the hollow rod (314) is fixedly connected to a fixed plate (318).

4. The automatic printing device for packaging boxes according to claim 3, characterized in that: Several sliding rods three (319) are slidably connected to the fixed plate two (318), and the left sides of several sliding rods three (319) are fixedly connected to the buffer plate (3110). The outer walls of several sliding rods three (319) are all sleeved with springs two (3111), and the left sides of several springs two (3111) are fixedly connected to the buffer plate (3110), and the right sides of several springs two (3111) are fixedly connected to the fixed plate two (318).

5. The automatic printing device for packaging boxes according to claim 1, characterized in that: The cleaning mechanism (4) comprises a fixing frame (411) fixedly connected to the top of the support frame (1), a slide groove (412) is provided on the fixing frame (411), two rotating shafts (413) are provided on the fixing frame (411), the rotating shaft (413) on the right side is rotatably connected to the fixing frame (411), the outer walls of the two rotating shafts (413) are fixedly connected to the cleaning rollers (414), and the outer wall of the rotating shaft (413) on the left side is fixedly connected to the limiting ring 2 (415), and the limiting ring 2 (415) is slidably connected to the slide groove (412).

6. The automatic printing device for packaging boxes according to claim 5, characterized in that: The outer walls of the two rotating shafts (413) are fixedly connected with gear three (416), and the two rotating shafts (413) are rotatably connected with hinged rods (417), and the two hinged rods (417) are hinged on the sides close to each other, and the two hinged rods (417) are rotatably connected with rotating shaft four (418), and the outer wall of the rotating shaft four (418) is fixedly connected with gear four (419), and the gear four (419) is meshed with the two gear threes (416).

7. The automatic printing device for packaging boxes according to claim 6, characterized in that: The rear side of the fixing frame (411) is rotatably connected to a threaded rod (4110), the rear side of the threaded rod (4110) is fixedly connected to a handle 2 (4111), the outer wall of the threaded rod (4110) is threadedly connected to a slider (4112), and the slider (4112) is rotatably connected to a rotating shaft 4 (418).

8. The automatic printing device for packaging boxes according to claim 7, characterized in that: The right side of the support frame (1) is fixedly connected to a fixing plate three (4113), and the fixing plate three (4113) is rotatably connected to a rotating shaft five (4114). The outer walls of the rotating shaft five (4114) and the rotating shaft two (212) are provided with a belt group one (4115), and the outer walls of the rotating shaft five (4114) and the rotating shaft (413) are provided with a belt group two (4116).

9. The automatic printing device for packaging boxes according to claim 1, characterized in that: The right side of the support frame (1) is fixedly connected to a support plate (101), and a printing device (102) is provided on the top of the support plate (101). Two rotating shafts (103) are rotatably connected to the support frame (1), and the right side of the rotating shaft (103) located at the front side extends to the outside of the support frame (1). The outer walls of the two rotating shafts (103) are fixedly connected to round rollers (104), and the outer walls of the two round rollers (104) are provided with conveyor belts (105). The right side of the support frame (1) is fixedly connected to a motor (106), and the output shaft of the motor (106) is fixedly connected to the rotating shaft (103) located at the front side through a coupling.

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