Feeding device for packaging box printing

Abstract

The utility model relates to the technical field of packaging printing feeding devices, in particular to a feeding device for packaging box printing, which comprises a working platform, a conveying assembly and an auxiliary feeding assembly, the conveying assembly is arranged at the top of the working platform, and limiting assemblies are symmetrically arranged on two sides of the top of the working platform. A supporting seat is arranged on the front side of the bottom of an inner cavity of the working platform, a transmission assembly used for automatic feeding is arranged between the supporting seat and the conveying assembly in a matched mode, an auxiliary feeding assembly is arranged on the side, close to the transmission assembly, of the top of the working platform, and a control panel is arranged on the side wall of the working platform. Through mutual cooperation of structures in the assemblies, the transmission assembly is synchronously driven to operate when the conveying assembly operates, and the advantage that the paperboard conveying speed and the paperboard feeding speed are the same is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging printing feeding devices, in particular to a feeding device for packaging box printing. Background Art

[0002] Packaging box printing refers to the process of printing decorative patterns, text or logos on packaging boxes, aiming to enhance the attractiveness of product appearance and the effectiveness of information transmission. The feeding device for packaging box printing is a feeding device used by auxiliary printing equipment. Its main function is to reduce manual handling and reduce labor intensity.

[0003] The existing utility model patent is a feeding mechanism for packaging printing (publication number: CN219193372U) which is provided with a printing material flattening unit, which is convenient for making the packaging box more flat and convenient for transmission. The compression spring is used for buffering, and the fixed column is used for fixing the pressure roller. The pressure roller is used to make the printed packaging box more flat when the protective box is transmitted;

[0004] Although the existing device reduces the cost of manual handling and achieves the benefit of flattening the paper boxes during transportation, it still needs to manually place each cardboard on the conveyor belt during the production process. During the working process, it is impossible for the manual feeding speed to be uniform, which may cause the printing press used in conjunction with the device to not match the feeding speed of the device, thereby causing paper accumulation or backlog and idling of the printing press. Therefore, a feeding device for packaging box printing is needed to improve the above problems. Utility Model Content

[0005] In order to solve the problem that the existing device cannot manually achieve a uniform feeding speed during use, which may lead to a mismatch between the feeding speed of the printing press used in conjunction with the device and the device, thereby causing paper accumulation or backlog and idling of the printing press, the utility model provides a feeding device for packaging box printing to solve the above-mentioned problem.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A feeding device for packaging box printing, comprising a working platform, a conveying assembly and an auxiliary feeding assembly, wherein the top of the working platform is provided with a conveying assembly, and both sides of the top of the working platform are symmetrically provided with limit assemblies, a support seat is provided at the front side of the bottom of the inner cavity of the working platform, a transmission assembly for automatic feeding is provided between the support seat and the conveying assembly, an auxiliary feeding assembly is provided at one side of the top of the working platform close to the transmission assembly, and a control panel is provided on the side wall of the working platform;

[0008] The transmission assembly includes a second mounting plate, and the transmission assembly includes a second connecting shaft and a first connecting shaft;

[0009] A first connecting shaft and a second connecting shaft are rotatably connected between the vertical side walls of the inner cavity of the working platform from front to back in sequence;

[0010] Main transmission wheels are respectively installed on both sides of the outer wall of the second connecting shaft;

[0011] The front ends of both sides of the top of the working platform are respectively provided with second mounting plates, and the sides of the two second mounting plates close to each other are respectively provided with auxiliary transmission wheels for rotation, and a belt is sleeved between the auxiliary transmission wheels and the main transmission wheels on the same side;

[0012] A connecting rod is rotatably arranged on one side of the secondary transmission wheel away from the second mounting plate, and a translation block is installed on one end of the connecting rod away from the secondary transmission wheel;

[0013] Positioning frames are symmetrically arranged on the left and right sides of the top of the support seat, and translation blocks are slidably installed in the two positioning frames respectively, and third connecting frames are respectively installed on the sides of the two translation blocks close to each other, and a pushing rod is installed between the two third connecting frames;

[0014] The auxiliary loading assembly includes a second connecting plate, and the second connecting plates are symmetrically arranged at the front ends of both sides of the top of the working platform, and the third connecting plate and the first connecting plate are sequentially distributed from front to back on the side where the two second connecting plates are close to each other.

[0015] As a preferred solution of the utility model, a mounting block is symmetrically arranged on the upper and left sides of the first connecting plate on one side away from the third connecting plate, a second threaded rod is rotatably installed between the two mounting blocks, a second rocker is rotatably installed on the two mounting blocks on the sides away from the second threaded rod, the two second rockers respectively pass through the mounting blocks and are fixedly connected to the second threaded rod, a moving block is symmetrically threadedly connected on the second threaded rod, a sliding groove is horizontally opened on the side wall of the first connecting plate, the two moving blocks are slidably installed in the sliding groove, and a clamping block is installed on the side of the two moving blocks away from the second threaded rod.

[0016] As a preferred solution of the utility model, the front and rear side walls of the clamping block are respectively in contact with the first connecting plate and the third connecting plate, the second threaded rod has a bidirectional thread design, the bottoms of the first connecting plate and the third connecting plate are on the same horizontal plane, and there is a height difference between the bottom of the second connecting plate and the bottom of the first connecting plate.

[0017] As a preferred solution of the utility model, a transmission belt is arranged between the second connecting shaft and the first connecting shaft, a motor is arranged on the rear side of the outer wall of the working platform, the power output shaft of the motor passes through the outer wall of the working platform and extends into the inner cavity of the working platform, and the first connecting shaft is installed on the power output end of the motor.

[0018] As a preferred solution of the utility model, the transmission belt is located below the support seat in the vertical direction, and anti-slip grooves are provided on the surface of the transmission belt.

[0019] As a preferred solution of the utility model, the limiting assembly includes a first connecting frame, the first connecting frame is symmetrically arranged on the top of the working platform, the two first connecting frames are parallel to each other and a mounting frame is respectively installed in the middle near one side, a first threaded rod is rotatably arranged in the inner cavity of the mounting frame, a first rocker is rotatably installed at the center position of the outer wall of the first connecting frame, the first rocker penetrates the outer wall of the first connecting frame and the mounting frame and extends to the interior of the mounting frame, the first rocker is "L" shaped, and the first threaded rod is fixedly installed at one end of the first rocker located inside the mounting frame.

[0020] As a preferred solution of the utility model, a first sliding block is threadedly connected to the first threaded rod, the first sliding block is "L"-shaped, a second connecting frame is provided at the end of the first sliding block away from the limiting component, a plurality of limiting roller groups are evenly distributed on the second connecting frame, and a plurality of cleaning components are cooperatively installed between the two second connecting frames located on the left and right sides.

[0021] As a preferred solution of the utility model, multiple first mounting plates are symmetrically and evenly distributed between the two limiting roller groups, and connecting wheels are rotatably installed below one side of the multiple first mounting plates close to each other. A two-way telescopic rod is connected between the two corresponding connecting wheels, and a spring is sleeved on the outer wall of the two-way telescopic rod. Both ends of the spring are respectively installed on the side walls of the connecting wheels, and a cleaning cloth is connected between the two corresponding connecting wheels via Velcro.

[0022] Compared with the prior art, the utility model sets a transmission component, a first connecting plate, a third connecting plate and a second connecting plate in a feeding device for packaging box printing. Through the mutual cooperation of the structures in the above components, the transmission component is synchronously driven to operate when the conveying component is in operation, so as to achieve the benefit of using the same speed for transporting cardboard and feeding cardboard, and solves the problem that in the existing device, during the working process, the manual feeding speed cannot be uniform, which may cause the feeding speed of the printing press used in conjunction with the device to be mismatched with that of the device, thereby causing paper accumulation or backlog and idling of the printing press.

[0023] Compared with the prior art, the utility model provides a cleaning component in a feeding device for packaging box printing. Through the mutual cooperation of the structures in the above components, different cleaning cloths can be replaced and adjusted according to different cardboard distances when the device is used, thereby achieving the benefit of cleaning the surfaces of cardboards of different sizes during the process of conveying cardboards, and solving the problem that the prior device cannot pre-clean the cardboard, resulting in dust and foreign matter on the cardboard, which will cause burrs on the printed cardboard or unclear printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the assembly structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the assembly structure of the transmission component of the utility model;

[0027] Figure 4 This is a schematic diagram of the auxiliary feeding assembly structure of the utility model;

[0028] Figure 5 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0029] Figure 6 This is a schematic diagram of the assembly structure of the limit assembly of the utility model;

[0030] Figure 7 This is a schematic diagram of the assembly structure of the cleaning component of the utility model.

[0031] In the figure: 1. working platform; 2. control panel; 3. limiting assembly; 301. first connecting frame; 302. mounting frame; 303. first threaded rod; 304. first rocker; 305. first sliding block; 306. second connecting frame; 307. limiting roller group; 4. transmission assembly; 401. motor; 402. first connecting shaft; 403. transmission belt; 404. second connecting shaft; 5. cleaning assembly; 501. first mounting plate; 502. connecting wheel; 503. two-way telescopic rod; 504. spring; 505. cleaning cloth; 6, auxiliary feeding assembly; 601, first connecting plate; 602, mounting block; 603, second connecting plate; 604, second threaded rod; 605, second rocker; 606, moving block; 607, clamping block; 608, slide groove; 609, third connecting plate; 7, support seat; 8, transmission assembly; 801, second mounting plate; 802, auxiliary transmission wheel; 803, connecting rod; 804, positioning frame; 805, translation block; 806, third connecting frame; 807, pushing rod; 808, main transmission wheel; 809, belt. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] Example: See Figure 1-7 A feeding device for packaging box printing shown in the figure comprises a working platform 1, a conveying assembly 4 and an auxiliary feeding assembly 6. The conveying assembly 4 is arranged on the top of the working platform 1, and the limit assemblies 3 are symmetrically arranged on both sides of the top of the working platform 1. A support seat 7 is arranged on the front side of the bottom of the inner cavity of the working platform 1, and a transmission assembly 8 for automatic feeding is arranged between the support seat 7 and the conveying assembly 4. An auxiliary feeding assembly 6 is arranged on one side of the top of the working platform 1 close to the transmission assembly 8, and a control panel 2 is arranged on the side wall of the working platform 1;

[0034] Further, the control panel 2 is used to control the operation of the electrical equipment used in the device;

[0035] The transmission assembly 8 includes a second mounting plate 801, and the transmission assembly 4 includes a second connecting shaft 404 and a first connecting shaft 402;

[0036] A first connecting shaft 402 and a second connecting shaft 404 are rotatably connected between the vertical side walls of the inner cavity of the working platform 1 from front to back;

[0037] Main transmission wheels 808 are respectively installed on both sides of the outer wall of the second connecting shaft 404;

[0038] The front ends of both sides of the top of the working platform 1 are respectively provided with second mounting plates 801, and the sides of the two second mounting plates 801 close to each other are respectively provided with auxiliary transmission wheels 802, and a belt 809 is sleeved between the auxiliary transmission wheels 802 and the main transmission wheels 808 on the same side;

[0039] A connecting rod 803 is rotatably provided on one side of the secondary transmission wheel 802 away from the second mounting plate 801, and a translation block 805 is installed on one end of the connecting rod 803 away from the secondary transmission wheel 802;

[0040] Positioning frames 804 are symmetrically arranged on the left and right sides of the top of the support seat 7, and translation blocks 805 are slidably installed in the two positioning frames 804 respectively, and third connecting frames 806 are installed on the sides of the two translation blocks 805 close to each other, and a push rod 807 is installed between the two third connecting frames 806;

[0041] The auxiliary loading assembly 6 includes a second connecting plate 603, and the second connecting plates 603 are symmetrically arranged at the front ends of both sides of the top of the working platform 1. The third connecting plate 609 and the first connecting plate 601 are sequentially distributed from front to back on the side where the two second connecting plates 603 are close to each other.

[0042] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 4 A mounting block 602 is symmetrically arranged on the upper side of the first connecting plate 601 away from the third connecting plate 609, a second threaded rod 604 is rotatably installed between the two mounting blocks 602, and second rocking arms 605 are rotatably installed on the sides of the two mounting blocks 602 away from the second threaded rod 604, respectively. The two second rocking arms 605 respectively penetrate the mounting blocks 602 and are fixedly connected to the second threaded rod 604, and the second threaded rod 604 is symmetrically threadedly connected with moving blocks 606, a sliding groove 608 is horizontally opened on the side wall of the first connecting plate 601, and the two moving blocks 606 are slidably installed in the sliding groove 608, and a clamping block 607 is installed on the side of the two moving blocks 606 away from the second threaded rod 604.

[0043] The front and rear side walls of the clamping block 607 are in contact with the first connecting plate 601 and the third connecting plate 609 respectively. The second threaded rod 604 has a bidirectional thread design. The bottoms of the first connecting plate 601 and the third connecting plate 609 are on the same horizontal plane. There is a height difference between the bottom of the second connecting plate 603 and the bottom of the first connecting plate 601.

[0044] Furthermore, when loading cardboards of different sizes, the second rocker arm 605 is rotated to drive the second threaded rod 604 to rotate, adjust the position between the two clamping blocks 607, and assist in positioning the cardboard between the two clamping blocks 607, so that the cardboards will not collapse to the surroundings when they are vertically stacked on the auxiliary loading component 6.

[0045] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 3 A transmission belt 403 is provided between the second connecting shaft 404 and the first connecting shaft 402, a motor 401 is provided at the rear side of the outer wall of the working platform 1, a power output shaft of the motor 401 penetrates the outer wall of the working platform 1 and extends into the inner cavity of the working platform 1, and a first connecting shaft 402 is installed on the power output end of the motor 401;

[0046] The motor 401 is started through the control panel 2 , and when started, the motor 401 drives the first connecting shaft 402 fixedly connected thereto to rotate, and drives the second connecting shaft 404 on the other side to rotate synchronously through the transmission belt 403 .

[0047] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 3 The transmission belt 403 is located below the support seat 7 in the vertical direction, and anti-slip grooves are provided on the surface of the transmission belt 403;

[0048] Among them, a cardboard is placed on the top of the support seat 7. When the cardboard is pushed by the pushing rod 807, the cardboard will move from the support seat 7 to above the transmission belt 403.

[0049] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 6 The limiting assembly 3 includes a first connecting frame 301, which is symmetrically arranged on the top of the working platform 1. The two first connecting frames 301 are parallel to each other and are respectively installed with a mounting frame 302 in the middle near one side. A first threaded rod 303 is rotatably arranged in the inner cavity of the mounting frame 302. A first rocker 304 is rotatably installed at the center of the outer wall of the first connecting frame 301. The first rocker 304 penetrates the outer walls of the first connecting frame 301 and the mounting frame 302 and extends to the inside of the mounting frame 302. The first rocker 304 is "L" shaped, and the first threaded rod 303 is fixedly installed at one end of the first rocker 304 located inside the mounting frame 302;

[0050] A first sliding block 305 is threadedly connected to the first threaded rod 303, and the first sliding block 305 is "L"-shaped. A second connecting frame 306 is arranged at one end of the first sliding block 305 away from the limiting component 3, and a plurality of limiting roller groups 307 are evenly distributed on the second connecting frame 306. A plurality of cleaning components 5 are installed between the two second connecting frames 306 on the left and right sides;

[0051] The first rocker 304 is rotated to drive the first threaded rod 303 to rotate. When the first threaded rod 303 rotates, the first sliding block 305 drives the second connecting frame 306 and the limiting roller group 307 to move in the horizontal direction, thereby realizing the limited transmission of cardboards of different widths.

[0052] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 6 A plurality of first mounting plates 501 are symmetrically and evenly distributed between the two limiting roller groups 307, and connecting wheels 502 are rotatably mounted below the plurality of first mounting plates 501 close to one side. A bidirectional telescopic rod 503 is connected between two corresponding connecting wheels 502, and a spring 504 is sleeved on the outer wall of the bidirectional telescopic rod 503. Both ends of the spring 504 are respectively mounted on the side walls of the connecting wheels 502, and a cleaning cloth 505 is connected between the two corresponding connecting wheels 502 via Velcro;

[0053] The cleaning cloth 505 is made of microfiber fabric or pure cotton cloth to absorb dust on the cardboard;

[0054] The length of the cleaning cloth 505 can be set in various sizes, and can be installed on the two connecting wheels 502 using Velcro according to actual needs.

[0055] When a feeding device for packaging box printing is working, firstly, all electrical devices in the device are powered on;

[0056] When loading, place the stack of cardboards downward along the rectangle formed by the second connecting plate 603, the first connecting plate 601 and the third connecting plate 609. After completion, start the motor 401 through the control panel 2. When the motor 401 is started, it will drive the first connecting shaft 402 fixedly connected thereto to operate, and drive the second connecting shaft 404 on the other side to rotate synchronously through the transmission belt 403.

[0057] As the second connecting shaft 404 rotates, the main transmission wheel 808 on the outer wall of the second connecting shaft 404 will also start to rotate synchronously with the second connecting shaft 404. As the main transmission wheel 808 rotates, the main transmission wheel 808 drives the auxiliary transmission wheel 802 on the second mounting plate 801 to rotate synchronously through the belt 809.

[0058] When the secondary transmission wheel 802 rotates, the connecting rod 803 on the side wall of the secondary transmission wheel 802 will drive the translation block 805 to reciprocate on the positioning frame 804. With the reciprocating motion of the translation block 805, the two third connecting frames 806 and the pushing rod 807 are driven to reciprocate synchronously. At this time, the pushing rod 807 will reciprocate and push the cardboard between the two second connecting plates 603 to load synchronously, so as to achieve the advantage of using the same speed for transporting cardboard and loading cardboard;

[0059] When the device transports cardboards of different sizes, the first rocker 304 is rotated to drive the first threaded rod 303 to rotate. When the first threaded rod 303 rotates, the first sliding block 305 will drive the second connecting frame 306 and the limiting roller group 307 to move in the horizontal direction. As the second connecting frame 306 moves, the first mounting plate 501 located on the second connecting frame 306 will move with the movement of the second connecting frame 306, and the bidirectional telescopic rod 503 between the corresponding connecting wheels 502 will also be telescoped. After the adjustment is completed, cleaning cloths 505 of different lengths are selected to be connected to the connecting wheels 502 by Velcro, thereby realizing the adjustment of the cleaning component 5; the benefit of being able to clean the cardboard surface during the cardboard transmission process is achieved.

[0060] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding device for packaging box printing, comprising a working platform (1), a conveying component (4) and an auxiliary feeding component (6), characterized in that: A conveying component (4) is arranged on the top of the working platform (1), and limit components (3) are symmetrically arranged on both sides of the top of the working platform (1). A support seat (7) is arranged on the front side of the bottom of the inner cavity of the working platform (1), and a transmission component (8) for automatic loading is arranged between the support seat (7) and the conveying component (4). An auxiliary loading component (6) is arranged on the side of the top of the working platform (1) close to the transmission component (8), and a control panel (2) is arranged on the side wall of the working platform (1); The transmission assembly (8) comprises a second mounting plate (801), and the transmission assembly (4) comprises a second connecting shaft (404) and a first connecting shaft (402); A first connecting shaft (402) and a second connecting shaft (404) are rotatably connected in sequence from front to back between the vertical side walls of the inner cavity of the working platform (1); Main transmission wheels (808) are respectively mounted on both sides of the outer wall of the second connecting shaft (404); Second mounting plates (801) are respectively arranged at the front ends of both sides of the top of the working platform (1); auxiliary transmission wheels (802) are rotatably arranged on the sides of the two second mounting plates (801) close to each other; and a belt (809) is sleeved between the auxiliary transmission wheels (802) and the main transmission wheels (808) located on the same side; A connecting rod (803) is rotatably provided on a side of the secondary transmission wheel (802) away from the second mounting plate (801), and a translation block (805) is installed on one end of the connecting rod (803) away from the secondary transmission wheel (802); Positioning frames (804) are symmetrically arranged on the left and right sides of the top of the support seat (7), and translation blocks (805) are slidably installed in the two positioning frames (804) respectively, and third connecting frames (806) are respectively installed on the sides of the two translation blocks (805) close to each other, and a pushing rod (807) is installed between the two third connecting frames (806); The auxiliary loading assembly (6) comprises a second connecting plate (603), and the second connecting plates (603) are symmetrically arranged at the front ends of both sides of the top of the working platform (1), and a third connecting plate (609) and a first connecting plate (601) are sequentially arranged from front to back on a side where the two second connecting plates (603) are close to each other.

2. A feeding device for packaging box printing according to claim 1, characterized in that: A mounting block (602) is symmetrically arranged on the upper side of the first connecting plate (601) away from the third connecting plate (609); a second threaded rod (604) is rotatably mounted between the two mounting blocks (602); a second rocker (605) is rotatably mounted on the side of the two mounting blocks (602) away from the second threaded rod (604); the two second rockers (605) respectively penetrate the mounting blocks (602) and are fixedly connected to the second threaded rod (604); a moving block (606) is symmetrically threadedly connected to the second threaded rod (604); a sliding groove (608) is horizontally opened on the side wall of the first connecting plate (601); the two moving blocks (606) are slidably mounted in the sliding groove (608); and a clamping block (607) is mounted on the side of the two moving blocks (606) away from the second threaded rod (604).

3. A feeding device for packaging box printing according to claim 2, characterized in that: The front and rear side walls of the clamping block (607) are in contact with the first connecting plate (601) and the third connecting plate (609) respectively; the second threaded rod (604) has a bidirectional thread design; the bottoms of the first connecting plate (601) and the third connecting plate (609) are on the same horizontal plane; and there is a height difference between the bottom of the second connecting plate (603) and the bottom of the first connecting plate (601).

4. A feeding device for packaging box printing according to claim 1, characterized in that: A transmission belt (403) is arranged between the second connecting shaft (404) and the first connecting shaft (402); a motor (401) is arranged on the rear side of the outer wall of the working platform (1); a power output shaft of the motor (401) passes through the outer wall of the working platform (1) and extends into the inner cavity of the working platform (1); and the first connecting shaft (402) is installed on the power output end of the motor (401).

5. A feeding device for packaging box printing according to claim 4, characterized in that: The transmission belt (403) is located below the support seat (7) in the vertical direction, and anti-slip grooves are provided on the surface of the transmission belt (403).

6. A feeding device for packaging box printing according to claim 1, characterized in that: The limiting assembly (3) comprises a first connecting frame (301), the first connecting frames (301) are symmetrically arranged on the top of the working platform (1), the two first connecting frames (301) are parallel to each other and are respectively installed with a mounting frame (302) in the middle close to one side, a first threaded rod (303) is rotatably arranged in the inner cavity of the mounting frame (302), a first rocker (304) is rotatably installed at the center position of the outer wall of the first connecting frame (301), the first rocker (304) penetrates the outer wall of the first connecting frame (301) and the mounting frame (302) and extends to the inside of the mounting frame (302), the first rocker (304) is "L"-shaped, and the first threaded rod (303) is fixedly installed at one end of the first rocker (304) located inside the mounting frame (302).

7. A feeding device for packaging box printing according to claim 6, characterized in that: A first sliding block (305) is threadedly connected to the first threaded rod (303); the first sliding block (305) is in an "L" shape; a second connecting frame (306) is provided at one end of the first sliding block (305) away from the limiting assembly (3); a plurality of limiting roller groups (307) are evenly distributed on the second connecting frame (306); and a plurality of cleaning assemblies (5) are mounted between two second connecting frames (306) located on the left and right sides.

8. A feeding device for packaging box printing according to claim 7, characterized in that: A plurality of first mounting plates (501) are symmetrically and evenly distributed between the two limiting roller groups (307), and connecting wheels (502) are rotatably mounted below one side of the plurality of first mounting plates (501) close to each other. A bidirectional telescopic rod (503) is connected between the two corresponding connecting wheels (502), and a spring (504) is sleeved on the outer wall of the bidirectional telescopic rod (503). Both ends of the spring (504) are respectively mounted on the side walls of the connecting wheels (502), and a cleaning cloth (505) is connected between the two corresponding connecting wheels (502) via Velcro.

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