CN214295024U

CN214295024U - Packaging box surface printing device for food packaging

Info

Publication number: CN214295024U
Application number: CN202120024501.9U
Authority: CN
Inventors: 杨俊�
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-09-28
Anticipated expiration: 2031-01-06

Abstract

The utility model discloses a food package is with packing carton surface stamp device, its technical scheme is: including the shell, cavity one has all been seted up to the shell both sides, cavity two has been seted up to shell one side, cavity two is located one of them cavity bottom, cavity three has been seted up to shell one side, cavity three is located one of them cavity rear side, cavity four has been seted up to the shell opposite side, cavity four is located another cavity bottom, cavity five has been seted up at the shell top, the beneficial effects of the utility model are that: the work of stamp can be repeated for a long time, and the dynamics of printing stamp is the same, just can not make the stamp quality difference appear, just can guarantee that the stamp quality on each food package surface is all the same, just so can reduce artificial intensity of labour, and the cleanness can be printed for more food package boxes in the short time, guarantees the quality of stamp unanimous when having accelerated the efficiency of stamp.

Description

Packaging box surface printing device for food packaging

Technical Field

The utility model relates to a packing carton field, concretely relates to packing carton surface stamp device for food package.

Background

Packages, as their name implies, are boxes used to package products, which can be classified by materials such as: carton, iron box, wooden box, cloth box, leather case, ya keli box, flute packing carton, PVC etc. also can classify according to the name of product and say: moon cakes box, tea box, medlar box, candy box, exquisite gift box, local specialty box, wine box, chocolate box, food and drug health product box, food packaging box, tea packaging box, stationery box, etc.

The prior art has the following defects: the existing food packaging box needs manual printing when printing and printing are carried out on the surface, the labor intensity of manual printing is high, the efficiency is low during manual printing, long-time work cannot be carried out, and it is guaranteed that each force for printing each food packaging box is the same, and printing deviation can occur.

Therefore, it is necessary to invent a surface printing device for a packaging box for food packaging.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a packing carton surface stamp device for food package, put into the roller bearing through the door with food package box from the rear side and rotate and just can make food package box remove, the cleaning brush just can be with the dust clearance at each food package box top, just need not the people to remove the dust on clearance each food package box surface, the face that just can not make food package box need stamp has the dust, just so can not cause food package box when the stamp because the dust leads to the quality reduction of stamp, need artifical the printing when solving food package box and need printing the stamp on the surface, artifical printing intensity of labour is big, efficiency is slower during artifical the printing, can not work for a long time, and can not guarantee that each dynamics of printing each food package box is all the same, the problem of printing deviation will appear.

In order to achieve the above object, the present invention provides the following technical solutions: a packaging box surface printing device for food packaging comprises a shell, wherein two sides of the shell are provided with a first cavity, one side of the shell is provided with a second cavity, the second cavity is positioned at the bottom of the first cavity, one side of the shell is provided with a third cavity, the third cavity is positioned at the rear side of the first cavity, the other side of the shell is provided with a fourth cavity, the fourth cavity is positioned at the bottom of the other cavity, the top of the shell is provided with a fifth cavity, and a transmission mechanism is arranged inside the shell;

the transmission mechanism comprises a motor, the motor is fixedly arranged on one side of the shell, four rolling shafts are arranged in the shell and are linearly arranged in a front-back manner, one end of each rolling shaft is movably connected with the shell through a bearing, the other end of each rolling shaft extends into the cavity IV, one end of each rolling shaft penetrates through the cavity II and is fixedly connected with an output shaft of the motor, the other end of each rolling shaft is fixedly sleeved with a gear I, the gear I is positioned in the cavity IV, a fixed plate is fixedly connected with the inner wall of one side of the cavity IV, one side of the fixed plate is fixedly connected with three connecting rods, the outer part of one end of each connecting rod is sleeved with a gear II, the joint of the gear II and the connecting rods is movably connected through bearings, the gear II is positioned in the cavity IV, and the three gear II are respectively positioned on the inner sides of the adjacent two gears I, the packaging box comprises a roller, a packaging box body is arranged at the top of the roller, a first reciprocating screw is embedded in a shell, one end of the first reciprocating screw extends into a third cavity, a first bearing seat is sleeved outside the first reciprocating screw, the first bearing seat is connected with the first reciprocating screw through a ball nut pair, a limiting component is arranged at the top of the first bearing seat, a cleaning brush is fixedly connected to the bottom of the first bearing seat and is attached to the top of the packaging box body, a second reciprocating screw is arranged inside the first two cavities, the top ends of the two reciprocating screws extend into the fifth cavity, the bottom end of one reciprocating screw extends into the second cavity, the bottom end of the other reciprocating screw extends to the bottom of the other cavity, a second bearing seat is sleeved outside the two reciprocating screws, and the second bearing seat is connected with the second reciprocating screw through the ball nut pair, and the inner sides of the two bearing seats are fixedly embedded with joint rods, and the bottoms of the joint rods are fixedly connected with printing rods.

Preferably, two equal fixedly connected with stopper one in two outer ends of bearing frame, two spacing groove one has all been seted up in cavity one outside, stopper one inlays and establishes in spacing groove one inside, stopper one and spacing groove one phase-match.

Preferably, a first bevel gear is fixedly sleeved outside one of the reciprocating screw rods, the first bevel gear is located inside one of the cavities, a second bevel gear is arranged on the rear side of the first bevel gear and meshed with the first bevel gear, a rotating shaft is fixedly connected to the rear end of the second bevel gear, the rear end of the rotating shaft extends into the third cavity, a third bevel gear is fixedly connected to the rear end of the rotating shaft and located inside the third cavity, a fourth bevel gear is fixedly connected to one end of the reciprocating screw rod and located inside the third cavity and meshed with the third bevel gear.

Preferably, the two reciprocating screw rods are fixedly sleeved with chain wheels outside the top ends, the chain wheels are located inside the cavity five, chains are sleeved outside the chain wheels, the chain wheels are connected through chain driving, one of the chain wheels is fixedly connected with a bevel gear five, the bevel gear five is located inside the cavity two, a bevel gear six is fixedly sleeved outside one end of one of the rolling shafts, and the bevel gear six is located inside the cavity two and meshed with the bevel gear five.

Preferably, the motor outside is equipped with the protective housing, protective housing fixed connection is in shell one side, a plurality of louvres have all been seted up to protective housing top and bottom, two bases of shell bottom fixedly connected with, the shell front side all inlays with the rear side and is equipped with the door, the door passes through hinge connection with the shell junction.

Preferably, the joints of the four rolling shafts and the shell are movably connected through bearings, the joint of the first reciprocating lead screw and the shell is movably connected through a bearing, the joint of the second reciprocating lead screw and the shell is movably connected through a bearing, and the joint of the rotating shaft and the shell is movably connected through a bearing.

Preferably, the limiting assembly comprises a limiting plate, the limiting plate is fixedly embedded in the shell, a second limiting block is fixedly connected to the top of the first bearing seat, a second limiting groove is formed in the bottom of the limiting plate, the second limiting block is embedded in the second limiting groove, the second limiting block is matched with the second limiting groove, and the section of the second limiting block is rectangular.

Preferably, the limiting assembly comprises a limiting plate, the limiting plate is fixedly embedded in the shell, a second limiting block is fixedly connected to the top of the first bearing seat, a second limiting groove is formed in the bottom of the limiting plate, the second limiting block is embedded in the second limiting groove, the second limiting block is matched with the second limiting groove, and the section of the second limiting block is rectangular T-shaped.

The utility model has the advantages that:

the utility model can move the food packaging box by putting the food packaging box into the rolling shaft from the door at the rear side and rotating, the cleaning brush can clean the dust at the top of each food packaging box, people do not need to clean the dust on the surface of each food packaging box, the surface of the food packaging box which needs to be printed is not provided with dust, therefore, the quality of the printing is not reduced due to dust when the food packaging box is printed, the printing work can be repeated for a long time by driving the printing rod to continuously move up and down by the bearing seat II, the printing force is the same, the printing quality is not different, the printing quality on the surface of each food packaging box can be ensured to be the same, therefore, the labor intensity of workers can be reduced, more food packaging boxes can be printed in a short time in a cleaning mode, the printing efficiency is improved, and the printing quality is guaranteed to be consistent.

Drawings

Fig. 1 is a schematic view of the overall structure provided by the present invention;

fig. 2 is a front view cross-sectional view provided by the present invention;

fig. 3 is an enlarged view of a point a in fig. 2 according to the present invention;

fig. 4 is an enlarged view of the point B in fig. 2 according to the present invention;

fig. 5 is a partial cross-sectional view of a left side view provided by the present invention;

fig. 6 is a right side view partially in section provided by the present invention;

fig. 7 is a perspective view of a limiting block according to embodiment 2 of the present invention;

in the figure: the packaging box comprises a shell 1, a motor 2, rollers 3, a first gear 4, a fixed plate 5, a connecting rod 6, a second gear 7, a packaging box body 8, a first reciprocating screw rod 9, a first bearing seat 10, a cleaning brush 11, a second reciprocating screw rod 12, a second bearing seat 13, a connecting rod 14, a printing rod 15, a first limit block 16, a first bevel gear 17, a second bevel gear 18, a rotating shaft 19, a third bevel gear 20, a fourth bevel gear 21, a sprocket 22, a chain 23, a fifth bevel gear 24, a sixth bevel gear 25, a protective shell 26, heat dissipation holes 27, a base 28, a door 29, a limit plate 30 and a second limit block 31.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Embodiment 1, with reference to fig. 1 to 6, the utility model provides a packaging box surface printing device for food packaging, including a housing 1, both sides of the housing 1 are provided with a first cavity, one side of the housing 1 is provided with a second cavity, the second cavity is located at the bottom of the first cavity, one side of the housing 1 is provided with a third cavity, the third cavity is located at the rear side of the first cavity, the other side of the housing 1 is provided with a fourth cavity, the fourth cavity is located at the bottom of the first cavity, the top of the housing 1 is provided with a fifth cavity, and a transmission mechanism is arranged inside the housing 1;

the transmission mechanism comprises a motor 2, the motor 2 is fixedly arranged on one side of a shell 1, four rolling shafts 3 are arranged in the shell 1, the four rolling shafts 3 are linearly arranged in a front-back manner, the joints of one ends of the four rolling shafts 3 and the shell 1 are movably connected through bearings, the other ends of the four rolling shafts 3 extend into a cavity IV, one end of one rolling shaft 3 penetrates through a cavity II and is fixedly connected with an output shaft of the motor 2, the other ends of the four rolling shafts 3 are fixedly sleeved with a gear I4, the gear I4 is positioned in the cavity IV, the inner wall of one side of the cavity IV is fixedly connected with a fixed plate 5, one side of the fixed plate 5 is fixedly connected with three connecting rods 6, one ends of the three connecting rods 6 are sleeved with a gear II 7, the joints of the gear II 7 and the connecting rods 6 are movably connected through bearings, and the gear II 7 is positioned in the cavity IV, the three second gears 7 are respectively positioned at the inner sides of two adjacent first gears 4, a packaging box body 8 is arranged at the top of the rolling shaft 3, a first reciprocating lead screw 9 is embedded in the shell 1, one end of the first reciprocating lead screw 9 extends to the inner part of the three cavities, a first bearing seat 10 is sleeved outside the first reciprocating lead screw 9, the first bearing seat 10 is connected with the first reciprocating lead screw 9 through a ball nut pair, a limiting component is arranged at the top of the first bearing seat 10, a cleaning brush 11 is fixedly connected to the bottom of the first bearing seat 10, the cleaning brush 11 is attached to the top of the packaging box body 8, two second reciprocating lead screws 12 are arranged in the first cavities, the top ends of the two second reciprocating lead screws 12 extend to the inner part of the five cavities, the bottom end of one second reciprocating lead screw 12 extends to the inner part of the two cavities, and the bottom end of the other second reciprocating lead screw 12 extends to the bottom of the other cavity, two bearing blocks 13 are sleeved outside the reciprocating screw rod two 12, the bearing blocks two 13 are connected with the reciprocating screw rod two 12 through ball nut pairs, two linking rods 14 are fixedly embedded in the inner sides of the bearing blocks two 13, and the bottoms of the linking rods 14 are fixedly connected with printing rods 15.

Furthermore, the outer ends of the two bearing blocks II 13 are fixedly connected with a first limiting block 16, a first limiting groove is formed in the outer side of each of the two cavities I, the first limiting block 16 is embedded in the first limiting groove, the first limiting block 16 is matched with the first limiting groove, and the first limiting block 16 can enable the bearing blocks II 13 to be more stable when moving and cannot shake;

furthermore, a first bevel gear 17 is fixedly sleeved outside one reciprocating screw rod two 12, the first bevel gear 17 is located inside one cavity I, a second bevel gear 18 is arranged on the rear side of the first bevel gear 17, the second bevel gear 18 is meshed with the first bevel gear 17, a rotating shaft 19 is fixedly connected to the rear end of the second bevel gear 18, the rear end of the rotating shaft 19 extends into the cavity III, a third bevel gear 20 is fixedly connected to the rear end of the rotating shaft 19, the third bevel gear 20 is located inside the cavity III, a fourth bevel gear 21 is fixedly connected to one 9 end of the reciprocating screw rod, the fourth bevel gear 21 is located inside the cavity III and meshed with the third bevel gear 20, and the first reciprocating screw rod 9 and the second reciprocating screw rod 12 can rotate simultaneously through transmission of the rotating shaft 19;

furthermore, chain wheels 22 are fixedly sleeved outside the top ends of the two reciprocating lead screws, the chain wheels 22 are positioned inside a cavity II, chains 23 are sleeved outside the two chain wheels 22, the two chain wheels 22 are in driving connection through the chains 23, a bevel gear V24 is fixedly connected to the bottom end of one reciprocating lead screw, the bevel gear V24 is positioned inside a cavity II, a bevel gear VI 25 is fixedly sleeved outside one end of one rolling shaft 3, the bevel gear VI 25 is positioned inside the cavity II and meshed with the bevel gear V24, and the two reciprocating lead screws 12 can rotate simultaneously through the chains 23;

further, a protective shell 26 is arranged outside the motor 2, the protective shell 26 is fixedly connected to one side of the shell 1, a plurality of heat dissipation holes 27 are formed in the top and the bottom of the protective shell 26, two bases 28 are fixedly connected to the bottom of the shell 1, doors 29 are embedded in the front side and the rear side of the shell 1, the connection positions of the doors 29 and the shell 1 are connected through hinges, and the two bases 28 can enable the device to be more stable in use;

furthermore, the joints of the four rolling shafts 3 and the shell 1 are movably connected through bearings, the joint of the reciprocating lead screw I9 and the shell 1 is movably connected through a bearing, the joint of the reciprocating lead screw II 12 and the shell 1 is movably connected through a bearing, the joint of the rotating shaft 19 and the shell 1 is movably connected through a bearing, and the abrasion of the device in use can be reduced and the service life of the device can be prolonged through the movable connection of the bearings at multiple positions;

further, the limiting assembly comprises a limiting plate 30, the limiting plate 30 is fixedly embedded in the shell 1, a first 10 top of the bearing seat is fixedly connected with a second limiting block 31, a second limiting groove is formed in the bottom of the limiting plate 30, the second limiting block 31 is embedded in the second limiting groove, the second limiting block 31 is matched with the second limiting groove, the cross section of the second limiting block 31 is rectangular, and the second limiting block 31 enables the first bearing seat 10 to be more stable when moving.

The utility model discloses a use as follows: when the food packaging box is used, a food packaging box is put into the shell 1 from the door 29 at the rear side, the motor 2 works to drive one of the rollers 3 to rotate, one of the rollers 3 rotates to drive one of the gears 4 to rotate, the four rollers 3 can simultaneously rotate under the condition that the gears 7 are meshed with the gears, so that the packaging box body 8 can be driven to move, one of the rollers 3 rotates to drive the bevel gear six 25 to rotate, the bevel gear six 25 rotates to drive the bevel gear five 24 to rotate, the bevel gear five 24 rotates to drive one of the reciprocating lead screws two 12 to rotate, one of the reciprocating lead screws two 12 rotates to drive one of the chain wheels 22 to rotate, one of the chain wheels 22 rotates to drive the other chain wheel 22 to rotate, the other chain wheel 22 rotates to drive the other reciprocating lead screw two 12 to rotate, and the two reciprocating lead screws two rotate to drive the two bearing blocks two 13 to move up and down, the two second bearing seats 13 move up and down to drive the connecting rods 14 to move up and down, the connecting rods 14 move up and down to drive the printing rods 15 to move up and down, the printing rods 15 can perform printing work on the surface of the packaging box body 8 by moving up and down, one reciprocating lead screw second 12 rotates to drive the bevel gear first 17 to rotate, the bevel gear first 17 rotates to drive the bevel gear second 18 to rotate, the bevel gear second 18 rotates to drive the rotating shaft 19 to rotate, the rotating shaft 19 rotates to drive the bevel gear third 20 to rotate, the bevel gear third 20 rotates to drive the bevel gear fourth 21 to rotate, the bevel gear fourth 21 rotates to drive the reciprocating lead screw first 9 to rotate, the reciprocating lead screw first 9 rotates to drive the bearing seats first 10 to move, the cleaning brushes 11 can be driven by moving the bearing seats first 10, and the cleaning brushes 11 can clean dust on the surface of the packaging box body 8.

Embodiment 2, refer to fig. 7, the utility model provides a pair of packing carton surface stamp device for food package, different with embodiment 1 is, spacing subassembly includes limiting plate 30, limiting plate 30 is fixed to be inlayed and is equipped with inside shell 1, bearing frame one 10 top fixedly connected with stopper two 31, limiting plate 30 bottom has been seted up spacing groove two, stopper two 31 are inlayed and are established at spacing groove two insidely, stopper two 31 and spacing groove two phase match, stopper two 31 cross-sections are rectangle T shape.

The utility model discloses a use as follows: when the utility model is used, a food packaging box is put into the shell 1 from the door 29 at the rear side, the motor 2 works to drive one of the rollers 3 to rotate, one of the rollers 3 rotates to drive the bevel gear six 25 to rotate, the bevel gear six 25 rotates to drive the bevel gear five 24 to rotate, the bevel gear five 24 rotates to drive one of the reciprocating lead screws two 12 to rotate, one of the reciprocating lead screws two 12 rotates to drive the bevel gear one 17 to rotate, the bevel gear one 17 rotates to drive the bevel gear two 18 to rotate, the bevel gear two 18 rotates to drive the rotating shaft 19 to rotate, the rotating shaft 19 rotates to drive the bevel gear three 20 to rotate, the bevel gear three 20 rotates to drive the bevel gear four 21 to rotate, the bevel gear four 21 rotates to drive the reciprocating lead screw one 9 to rotate, the reciprocating lead screw one 9 can drive the bearing seat one 10 to move, the bearing seat one 10 moves to drive the cleaning brush 11 to move to clean dust on the surface of the packaging box body 8, the bearing seat I10 can shake when moving, the second limiting block 31 is arranged to be T-shaped, the contact area between the second limiting block 31 and the limiting groove can be increased, the bearing seat I10 can be more stable when moving, and shaking cannot occur.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims

1. The utility model provides a food package is with packing carton surface stamp device, includes shell (1), its characterized in that: the two sides of the shell (1) are respectively provided with a first cavity, one side of the shell (1) is provided with a second cavity, the second cavity is positioned at the bottom of the first cavity, one side of the shell (1) is provided with a third cavity, the third cavity is positioned at the rear side of the first cavity, the other side of the shell (1) is provided with a fourth cavity, the fourth cavity is positioned at the bottom of the second cavity, the top of the shell (1) is provided with a fifth cavity, and a transmission mechanism is arranged inside the shell (1);

the transmission mechanism comprises a motor (2), the motor (2) is fixedly installed on one side of a shell (1), four rolling shafts (3) are arranged in the shell (1) in a linear mode, the rolling shafts (3) are arranged in the front and at the back, the joints of one ends of the rolling shafts (3) and the shell (1) are movably connected through bearings, the other ends of the rolling shafts (3) extend to the four inner parts of the cavity, one end of each rolling shaft (3) penetrates through a second cavity and is fixedly connected with an output shaft of the motor (2), a first gear (4) is fixedly sleeved on the other end of each rolling shaft (3), the first gear (4) is located in the four inner parts of the cavity, a fixing plate (5) is fixedly connected to the inner wall of the four sides of the cavity, three connecting rods (6) are fixedly connected to one side of the fixing plate (5), and a second gear (7) is sleeved outside one end of each connecting rod (6), the connecting part of the second gear (7) and the connecting rod (6) is movably connected through a bearing, the second gear (7) is positioned in the fourth cavity, the third gear (7) is respectively positioned at the inner sides of the first adjacent gears (4), the top of the rolling shaft (3) is provided with a packaging box body (8), the shell (1) is internally embedded with a first reciprocating lead screw (9), one end of the first reciprocating lead screw (9) extends to the third cavity, the first reciprocating lead screw (9) is externally sleeved with a first bearing seat (10), the first bearing seat (10) is connected with the first reciprocating lead screw (9) through a ball nut pair, the top of the first bearing seat (10) is provided with a limiting component, the bottom of the first bearing seat (10) is fixedly connected with a cleaning brush (11), the cleaning brush (11) is attached to the top of the packaging box body (8), and the first cavity is internally provided with a second reciprocating lead screw (12), two (12) tops of reciprocating screw all extend to five insides of cavity, and inside two (12) bottoms of one of them reciprocating screw extended to two cavitys, and another two (12) bottoms of reciprocating screw extended to another cavity bottom, two (12) outside of reciprocating screw all is overlapped and is equipped with bearing frame two (13), bearing frame two (13) pass through ball nut pair with two (12) of reciprocating screw and are connected, two the inboard fixed joint pole (14) that inlays of bearing frame two (13), joint pole (14) bottom fixedly connected with seal rod (15).

2. The packaging box surface printing device for food packaging according to claim 1, wherein: two equal fixedly connected with stopper one (16) in bearing frame two (13) outer end, two spacing groove one has all been seted up in cavity one outside, stopper one (16) are inlayed and are established in spacing inslot portion, stopper one (16) and spacing groove phase-match.

3. The packaging box surface printing device for food packaging according to claim 1, wherein: the external fixed sleeve of one of the reciprocating screw rod II (12) is provided with a bevel gear I (17), the bevel gear I (17) is located inside one of the cavities, the rear side of the bevel gear I (17) is provided with a bevel gear II (18), the bevel gear II (18) is meshed with the bevel gear I (17), the rear end of the bevel gear II (18) is fixedly connected with a rotating shaft (19), the rear end of the rotating shaft (19) extends to the inside of the cavity III, the rear end of the rotating shaft (19) is fixedly connected with a bevel gear III (20), the bevel gear III (20) is located inside the cavity III, the end of the reciprocating screw rod I (9) is fixedly connected with a bevel gear IV (21), and the bevel gear IV (21) is located inside the cavity III and is meshed with the bevel gear III (20).

4. The packaging box surface printing device for food packaging according to claim 1, wherein: two outside all fixed cover in reciprocal lead screw top is equipped with sprocket (22), sprocket (22) are located five insides of cavity, two the sprocket (22) outside all is equipped with chain (23), two connect through chain (23) drive between sprocket (22), one of them reciprocal lead screw bottom fixedly connected with bevel gear five (24), bevel gear five (24) are located two insides of cavity, and one of them roller bearing (3) one end external fixation cover is equipped with bevel gear six (25), bevel gear six (25) are located two insides of cavity and mesh mutually with bevel gear five (24).

5. The packaging box surface printing device for food packaging according to claim 1, wherein: the motor (2) outside is equipped with protective housing (26), protective housing (26) fixed connection is in shell (1) one side, a plurality of louvres (27) have all been seted up to protective housing (26) top and bottom, two bases (28) of shell (1) bottom fixedly connected with, shell (1) front side and rear side all inlay and are equipped with door (29), door (29) pass through hinge connection with shell (1) junction.

6. The surface printing device for the packaging box for food packaging according to claim 3, wherein: four roller bearing (3) and shell (1) junction pass through bearing swing joint, reciprocal lead screw (9) and shell (1) junction pass through bearing swing joint, reciprocal lead screw two (12) and shell (1) junction pass through bearing swing joint, pivot (19) and shell (1) junction pass through bearing swing joint.

7. The packaging box surface printing device for food packaging according to claim 1, wherein: the limiting assembly comprises a limiting plate (30), the limiting plate (30) is fixedly embedded inside the shell (1), a bearing seat I (10) and a limiting block II (31) are fixedly connected to the top of the bearing seat I, a limiting groove II is formed in the bottom of the limiting plate (30), the limiting block II (31) is embedded inside the limiting groove II, the limiting block II (31) is matched with the limiting groove II, and the section of the limiting block II (31) is rectangular.

8. The packaging box surface printing device for food packaging according to claim 1, wherein: the limiting assembly comprises a limiting plate (30), the limiting plate (30) is fixedly embedded inside the shell (1), a first bearing seat (10) and a second limiting block (31) are fixedly connected to the top of the bearing seat, a second limiting groove is formed in the bottom of the limiting plate (30), the second limiting block (31) is embedded inside the second limiting groove, the second limiting block (31) is matched with the second limiting groove, and the section of the second limiting block (31) is in a rectangular T shape.