Paperboard transfer device

Abstract

The utility model discloses a paperboard transferring device which is used for transferring paperboards on a packaging box production line and sequentially comprises a material collecting assembly, a carrying robot, a circulating conveying line and a plurality of feeding robots used for feeding corresponding box pasting machines in the conveying direction of the paperboards. The material collecting assembly is located on the downstream of a conveying mechanism at the discharging end of the paperboard printing device and comprises a fixing frame, two material collecting frames and a first driving mechanism, the two material collecting frames are slidably assembled on the top of the fixing frame side by side, the first driving mechanism is used for driving the material collecting frame to reciprocate, and the moving direction of the material collecting frames is perpendicular to the conveying direction of the conveying mechanism. The circulating conveying line comprises an annular rail and a plurality of transfer frames assembled on the top of the annular rail at intervals. Through cooperation of the robot, the material collecting assembly and the circulating conveying line, effective transfer of paperboards between the paperboard printing device and the box pasting machine on the packaging box production line is achieved, manual carrying is not needed, the working efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging box production, in particular to a paperboard transfer device. Background Art

[0002] The production method of the packaging box is as follows: the rolled cardboard is first printed with a pattern on a printing device; the die-cutting machine cuts the printed cardboard into blocks, which are then die-cut and shaped; the folder-gluing machine folds the die-cut cardboard and glues them together to make a packaging box.

[0003] In the prior art, in the production line of packaging boxes, a conveying mechanism is provided at the paper outlet of the die-cutting machine. Cardboard comes out of the paper outlet of the die-cutting machine and is conveyed by the conveying mechanism. Workers need to manually sort the cardboard on the conveying mechanism, stack the cardboard on the conveying mechanism, and put the stacked cardboard on the buffer pallet. In addition, the folder gluer requires continuous manual feeding and supply, and the specific operation is that the workers continuously move the cardboard on the storage pallet and move the cardboard to the folder gluer for feeding. In the process of transferring the above-mentioned cardboard, a large amount of manpower is required, the labor intensity is high, and the labor cost and consumption are high. Utility Model Content

[0004] The utility model aims to provide a cardboard transfer device, which can realize the effective transfer of cardboard between a die-cutting machine and a box-gluing machine on a packaging box production line without manual handling, thereby improving work efficiency.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A cardboard transfer device is used for transferring cardboard on a packaging box production line, and includes a receiving component, a handling robot, a circulating conveyor line and a plurality of feeding robots for feeding corresponding folder gluers in the conveying direction of the cardboard;

[0007] The receiving assembly is located downstream of the conveying mechanism at the paper outlet of the die-cutting machine, and includes a fixed frame, two receiving frames slidably mounted on the top of the fixed frame, and a first driving mechanism for driving the receiving frames to reciprocate; the receiving frames are located at the end of the conveying surface of the conveying mechanism, the moving direction of the receiving frames is perpendicular to the conveying direction of the conveying mechanism, and the two receiving frames are arranged side by side along the moving direction of the receiving frames;

[0008] The circulating conveying line comprises an annular track between the material receiving assembly and the folder-gluing machine and a plurality of transfer frames which are assembled at intervals on the top of the annular track.

[0009] The utility model realizes the effective transfer of cardboard between the die-cutting machine and the box-gluing machine on the packaging box production line through the cooperation of the robot, the material receiving component and the circulating conveyor line, without manual handling, thus improving work efficiency and reducing costs.

[0010] As a further solution of the utility model, the cardboard transfer device is also provided with a controller; the material receiving assembly also includes a first sensor for detecting whether there is cardboard in the material receiving frame; the circulating conveyor line also includes a second sensor for detecting whether there is cardboard in the transfer frame; the conveying mechanism, the first sensor, the first driving mechanism, the handling robot, the circular track, the second sensor, the loading robot and the folder gluer are respectively connected to the controller. The above solution is adopted to realize the automatic control of the cardboard transfer device.

[0011] As a further solution of the utility model, the circular track includes two semicircular arc segments and two straight segments; the outer side of the semicircular arc segment is arranged close to the receiving assembly, and the handling robot is located on the inner side of the semicircular arc segment; the outer side of the straight line segment is arranged close to the folder gluer, and the feeding robot is located between the straight line segment and the corresponding folder gluer. The above solution is adopted to meet the flow requirements of cardboard between the handling robot and the feeding robot.

[0012] As a further solution of the utility model, a slide rail device for reciprocating motion of the feeding robot is arranged below the feeding robot. The above solution is adopted to expand the range of motion of the feeding robot.

[0013] As a further solution of the utility model, the top of the receiving frame is provided with a receiving opening for receiving cardboard, the receiving opening is located at the end of the conveying surface of the conveying mechanism, and the receiving opening is flush with or lower than the conveying surface of the conveying mechanism; the side wall of the receiving frame away from the conveying mechanism is provided with a first notch for avoiding the clamping end of the handling robot; the bottom of the receiving frame is provided with a first avoidance groove, and the upper and lower ends of the first notch are respectively connected to the receiving opening and the first avoidance groove. The above solution is adopted so that the handling robot can take out the cardboard in the receiving frame.

[0014] As a further solution of the utility model, the material receiving opening is in a flared shape extending in all directions. The above solution reduces the difficulty of the material receiving frame receiving the cardboard.

[0015] As a further solution of the utility model, a loading opening is provided on the top of the transfer frame, a second notch is provided on the side wall of the transfer frame, a second avoidance groove is provided on the bottom of the transfer frame, and the upper and lower ends of the second notch are respectively connected to the loading opening and the second avoidance groove. The above solution is adopted to better cooperate with the clamping end of the handling robot and the loading robot.

[0016] As a further solution of the utility model, the transfer frame includes a bottom plate and front, rear and left baffles fixedly mounted on the upper surface of the bottom plate and forming a rectangular cavity, and the second notch is located on the right side of the front baffle of the transfer frame. The above solution has a simple structure and is easy to manufacture.

[0017] As a further solution of the utility model, the clamping end of the handling robot includes a first upper clamping plate, a first lower clamping plate and a second driving mechanism for driving the two to open and close. The above solution is adopted so that the handling robot can take out the cardboard in the receiving frame.

[0018] As a further solution of the utility model, the clamping end of the feeding robot includes a second upper clamping plate, a second lower clamping plate and a third driving mechanism for driving the two to open and close. The above solution is adopted so that the feeding robot can take out the cardboard in the transfer frame.

[0019] Beneficial effects of the utility model:

[0020] The utility model realizes the effective transfer of cardboard between the die-cutting machine and the folder-gluing machine on the packaging box production line through the cooperation of the robot, the material receiving assembly and the circulating conveyor line, without manual handling, thus improving work efficiency and reducing costs;

[0021] The utility model realizes continuous material collection of the material collection component through the reciprocating motion of the two material collection frames and the alternating material collection, thereby improving the working efficiency;

[0022] In the utility model, the material receiving component, the handling robot and the loading robot can work simultaneously, thus effectively improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings:

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

[0025] Figure 2 It is a schematic diagram of the material receiving component in the utility model (I);

[0026] Figure 3 It is a schematic diagram of the material receiving component in the utility model (II);

[0027] Figure 4 It is a schematic diagram of a material receiving frame in the utility model;

[0028] Figure 5 It is a partial schematic diagram of the clamping end of the handling robot in the utility model;

[0029] Figure 6 It is a schematic diagram of the transfer frame in the utility model (I);

[0030] Figure 7 It is a schematic diagram of the transfer frame in the utility model (II);

[0031] Figure 8 It is a partial schematic diagram of the clamping end of the feeding robot in the utility model.

[0032] The accompanying drawings are denoted as follows:

[0033] 1. Material receiving assembly; 11. Fixed frame; 12. Material receiving frame; 121. First gap; 122. First avoidance groove; 13. First driving mechanism; 14. Support plate; 2. Handling robot; 21. First upper clamping plate; 22. First lower clamping plate; 3. Circular conveyor line; 31. Annular track; 32. Transfer frame; 321. Second gap; 322. Second avoidance groove; 4. Loading robot; 41. Second upper clamping plate; 42. Second lower clamping plate; 5. Slide rail device; 6. Folder gluing machine; 7. Conveying mechanism; 8. Cardboard. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] A cardboard transfer device is used for transferring cardboard on a packaging box production line. The packaging box production line includes a printing device, a die-cutting machine, a conveying mechanism 7 and a folder gluer 6 in sequence. The conveying mechanism 7 is arranged at the paper outlet of the die-cutting machine, and the conveying mechanism 7 includes but is not limited to a conveyor belt. The cardboard transfer device is arranged between the conveying mechanism 7 and the folder gluer 6 to transfer the cardboard 8 on the conveying mechanism 7 to the folder gluer 6. Please refer to Figure 1 As shown, the cardboard transfer device includes a material receiving component 1, a handling robot 2, a circulating conveying line 3 and a plurality of loading robots 4 in sequence along the conveying direction of the cardboard 8.

[0036] The receiving assembly 1 is located downstream of the conveying mechanism 7, and is used to receive the cardboard 8 conveyed by the conveying mechanism 7. The circulating conveyor line 3 is located between the receiving assembly 1 and the folder gluer 6. The handling robot 2 is located near the circulating conveyor line 3 and the receiving assembly 1, and is used to carry the cardboard 8 stacked on the receiving assembly 1 to the circulating conveyor line 3. The feeding robot 4 is located near the circulating conveyor line 3 and the corresponding folder gluer 6, and is used to carry the cardboard 8 circulating on the circulating conveyor line 3 to the corresponding folder gluer 6.

[0037] See also Figure 2 to Figure 4As shown, the receiving assembly 1 includes a fixed frame 11, two receiving frames 12 slidably mounted on the top of the fixed frame 11, and a first driving mechanism 13 for driving the receiving frames 12 to reciprocate. The movement direction of the receiving frames 12 is perpendicular to the conveying direction of the conveying mechanism 7 (i.e., the movement direction of the receiving frames 12 is perpendicular to the conveying direction of the conveying mechanism 7). Figure 1 Conveying direction shown). Specifically, the fixed frame 11 is fixed at the end of the conveying mechanism 7. The two material receiving frames 12 are fixed side by side on the top of the same support plate 14 along the movement direction of the material receiving frame 12. A guide block is fixed to the bottom of the support plate 14, and a guide groove is correspondingly provided on the top of the fixed frame 11. The guide block is placed in the guide groove to limit the movement direction of the support plate 14. In this embodiment, the first driving mechanism 13 is a rodless cylinder, which is composed of a guide rail and a slider. Among them, the guide rail is fixed to the bottom of the fixed frame 11. A strip hole for the slider to pass through is provided on the fixed frame 11. The slider passes through the strip hole and is fixed to the bottom of the support plate 14 to drive the two material receiving frames 12 to move.

[0038] The receiving frame 12 is located at the end of the conveying surface of the conveying mechanism 7. A receiving opening for receiving the cardboard 8 is provided at the top of the receiving frame 12. The receiving opening is flush with or lower than the conveying surface of the conveying mechanism 7 so as to receive the cardboard 8. The receiving opening is in a flared shape extending in all directions to reduce the difficulty of the receiving opening receiving the cardboard 8. In this embodiment, the receiving frame 12 includes a bottom plate and front, rear, left and right baffles fixedly mounted on the upper surface of the bottom plate and enclosing a rectangular cavity. Among them, a first notch 121 for avoiding the clamping end of the handling robot 2 is provided on the front baffle of the receiving frame 12 (i.e., the baffle on the side away from the conveying mechanism 7). A first avoidance groove 122 is provided on the bottom plate of the receiving frame 12, and the first avoidance groove 122 is arranged near the front baffle of the receiving frame 12. The upper and lower ends of the first notch 121 are respectively connected to the receiving opening and the first avoidance groove 122. A first sensor is installed on the bottom plate of each receiving frame 12 to detect whether there is a cardboard 8 in the receiving frame 12. In this embodiment, the first sensor is a photoelectric sensor.

[0039] The fixed frame 11 is divided into three stations along the moving direction of the receiving frame 12. The three stations include a receiving station for receiving the cardboard 8 on the conveying mechanism 7 and left and right waiting stations distributed on the left and right sides of the receiving station. Among them, the receiving station is aligned front and back with the end of the conveying mechanism 7. The two receiving frames 12 are respectively placed on the receiving station and one of the waiting stations. An in-place sensor is respectively provided on the two waiting stations of the fixed frame 11. The in-place sensor is fixed on the fixed frame 11, and is used to detect whether the receiving frame 12 on the fixed frame 11 is in place. A counter is provided on the receiving station of the fixed frame 11. In this embodiment, the counter is a counting electric eye, which is fixed at the end of the conveying mechanism 7 and located above the receiving frame 12, and is used to record the number of cardboards 8 conveyed to the receiving frame 12 by the conveying mechanism 7.

[0040] See also Figure 1 As shown, the circulating conveyor line 3 includes a circular track 31 for circulating cardboard 8 and a plurality of transfer frames 32 installed at intervals on the top of the circular track 31. A plurality of conveying stations are arranged at equal intervals on the circular track 31. When the circulating conveyor line 3 is started, the circular track 31 moves intermittently, that is, the circular track 31 stops for a period of time after traveling a certain number of conveying stations. A transfer frame 32 is installed on each conveying station so that more cardboards 8 can be temporarily stored on the circulating conveyor line 3, thereby meeting the cardboard 8 feeding needs of multiple folder gluers 6.

[0041] In this embodiment, the circular track 31 includes two semicircular arc segments and two straight segments. The outer side of the semicircular arc segment is arranged near the receiving assembly 1, and the handling robot 2 is located on the inner side of the semicircular arc segment. The outer side of the straight line segment is arranged near the folder gluer 6, and a plurality of feeding robots 4 are located between the straight line segment and the corresponding folder gluer 6. The circular track 31 drives the transfer frame 32 to circulate, so that the transfer frame 32 in the empty frame state can flow to the vicinity of the receiving assembly 1, and the transfer frame 32 in the fully loaded state can flow to the vicinity of the feeding robot 4.

[0042] See also Figure 6-7 As shown, a loading opening is provided at the top of the transfer frame 32. The opening is in a flared shape extending in all directions to reduce the difficulty of placing the cardboard 8 into the transfer frame 32. In this embodiment, the transfer frame 32 includes a bottom plate and a front baffle (i.e., a baffle close to the outside of the annular track 31), a rear baffle (i.e., a baffle close to the inside of the annular track 31) and a left baffle fixedly mounted on the upper surface of the bottom plate and enclosing a rectangular cavity. The transfer frame 32 encloses the cardboard 8 in the front, rear and left directions to prevent the cardboard 8 in the transfer frame 32 from accidentally scattering outside the transfer frame 32. The transfer frame 32 has a simple structure and is easy to process and manufacture. Among them, the left side of the front baffle of the transfer frame 32 is connected to the left baffle of the transfer frame 32, and a second notch 321 is provided on the front side of the transfer frame 32. The second notch 321 is located on the right side of the front baffle to avoid the clamping end of the handling robot 2 and the clamping end of the feeding robot 4. A second avoidance groove 322 is provided on the bottom plate of the transfer frame 32, and effectively adapts to the clamping end of the handling robot 2 and the clamping end of the feeding robot 4. The second avoidance groove 322 is located on the right side of the front baffle. The upper and lower ends of the second notch 321 are respectively connected to the feeding opening and the second avoidance groove 322. A second sensor is installed on the bottom plate of each transfer frame 32 to detect whether there is a cardboard 8 in the transfer frame 32. In this embodiment, the second sensor is a photoelectric sensor.

[0043] See also Figure 5As shown, the clamping end of the handling robot 2 includes a first upper clamping plate 21, a first lower clamping plate 22, and a second driving mechanism for driving the two to open and close. When the handling robot 2 clamps a whole stack of cardboards 8 stacked in the receiving frame 12 in the waiting area, the first upper clamping plate 21 is placed directly above the top of the stack of cardboards 8, and the first lower clamping plate 22 is inserted into the first avoidance groove 122, so that the first lower clamping plate 22 is placed at the bottom of the stack of cardboards 8; at this time, the second driving mechanism drives the two clamping plates to clamp the stack of cardboards 8, and take the stack of cardboards 8 out of the receiving frame 12 from the receiving opening of the receiving frame 12. Then the handling robot 2 clamps the stack of cardboards 8 and moves to the circulating conveyor line 3, and places the cardboards 8 into the corresponding transfer frame 32 through the second notch 321 and the loading opening. Among them, in order to ensure that the clamping end of the handling robot 2 does not affect the placement of the cardboard 8 in the transfer frame 32 when it is pulled out from the transfer frame 32, the first lower clamping plate 22 needs to be aligned with the second avoidance groove 322 when placing the cardboard 8; when the bottom of the stack of cardboards 8 contacts the bottom plate of the transfer frame 32, the first lower clamping plate 22 is placed in the second avoidance groove 322; when the handling robot 2 releases the stack of cardboards 8, the first lower clamping plate 22 is pulled out from the second avoidance groove 322, which will not affect the placement of the cardboard 8 above it.

[0044] See also Figure 8 As shown, the clamping end of the loading robot 4 includes a second upper clamping plate 41, a second lower clamping plate 42 and a third driving mechanism that drives the two to open and close. When the loading robot 4 clamps a whole stack of cardboards 8 in the transfer frame 32 in the waiting area, the second upper clamping plate 41 is placed directly above the top of the stack of cardboards 8, and the second lower clamping plate 42 is inserted into the second avoidance groove 322, so that the second lower clamping plate 42 is placed at the bottom of the stack of cardboards 8; at this time, the third driving mechanism drives the two clamping plates to clamp the stack of cardboards 8, and takes the stack of cardboards 8 out of the transfer frame 32 from the loading opening of the transfer frame 32. Then the loading robot 4 clamps the stack of cardboards 8 and transports them to the loading mechanism of the folder gluer 6 to meet the cardboard 8 loading needs of the folder gluer 6. In this embodiment, please refer to Figure 5 and Figure 8 As shown, the first lower clamping plate 22 and the second lower clamping plate 42 are both made of the same lower clamping plate. The lower clamping plate is in the shape of a fork, including a fork head and three fork teeth arranged at the front end of the fork head. Therefore, the first avoidance groove 122 and the second avoidance groove 322 are avoidance grooves of the same shape, so as to better adapt the first lower clamping plate 22 and the second lower clamping plate 42.

[0045] In order to make full use of the feeding robot 4, one feeding robot 4 is responsible for feeding the cardboards 8 of multiple folder-gluing machines 6. In order to ensure that the working range of the feeding robot 4 can cover multiple folder-gluing machines 6, a slide rail device 5 for driving the feeding robot 4 to reciprocate is provided under each feeding robot 4, that is, the feeding robot 4 expands its working range through the slide rail device 5.

[0046] In this embodiment, a material shortage sensor and a material fullness sensor are provided on the feeding mechanism of each folder-gluing machine 6 for monitoring the feeding status of the feeding mechanism.

[0047] The cardboard transfer device is also provided with a controller to realize automatic control of the cardboard transfer device. Specifically, the conveying mechanism 7, the first driving mechanism 13, the first sensor, the in-position sensor, the counter, the handling robot 2, the circular track 31, the second sensor, the feeding robot 4, the slide rail device 5 and the folder gluer 6 are respectively connected to the controller.

[0048] In this embodiment, the working principle of the cardboard transfer device is as follows:

[0049] Before the cardboard transfer device is started, the two receiving frames 12 are in an empty frame state. One receiving frame 12 is placed at the receiving station, and the other receiving frame 12 is placed at the left waiting station.

[0050] After the paperboard transfer device is started, the controller controls the conveying mechanism 7 to convey the paperboard 8 to the receiving frame 12 located at the receiving station;

[0051] The controller determines whether the receiving frame 12 at the receiving station is in a fully loaded state according to the count of the counter. When the counter detects that the number of cardboards 8 in the receiving frame 12 at the receiving station reaches a preset value, the controller determines that the receiving frame 12 is in a fully loaded state. At this time, the controller controls the conveying mechanism 7 to stop conveying cardboards 8 to the receiving frame 12, and controls the first driving mechanism 13 to drive the support plate 14 to move, so that the receiving frame 12 in a fully loaded state is placed at the right waiting station, and the receiving frame 12 in an empty frame state is placed at the receiving station. Among them, when the fully loaded receiving frame 12 is just placed at the right waiting station, the corresponding in-position sensor sends an in-position signal to the controller, and the controller controls the first driving mechanism 13 to stop running. At the same time, the controller controls the conveying mechanism 7 to re-convey cardboards 8 to the receiving frame 12 at the receiving station, and the counter restarts counting.

[0052] During the period when the conveying mechanism 7 is re-delivering the cardboard 8 to the receiving frame 12 located at the receiving station, since the first sensor detects that there is cardboard placed in the receiving frame 12 located at the right waiting station, the controller controls the transport robot 2 to take out the cardboard 8 in the receiving frame 12 located at the right waiting station, so that the receiving frame 12 located at the right waiting station is in an empty frame state, so that the controller controls the two receiving frames 12 to alternately receive the cardboard 8.

[0053] After the controller controls the handling robot 2 to clamp the cardboard 8 in the receiving frame 12, when the controller detects that the annular track 31 performing intermittent motion is in a stationary state and there is an empty transfer frame 32 near the handling robot 2, the controller controls the handling robot 2 to place the clamped cardboard 8 in the empty transfer frame 32 near it. The controller determines whether the corresponding transfer frame 32 is in an empty state through the second sensor.

[0054] Since a plurality of transfer frames 32 are mounted on the circular track 31 , the transfer frames 32 in an empty frame state and the transfer frames 32 in a non-empty frame state can coexist on the circulating conveyor line 3 , that is, while the transport robot 2 is transporting the cardboard 8 , the loading robot 4 can also transport the cardboard 8 .

[0055] When the out-of-material sensor of the folder gluer 6 sends an out-of-material signal to the controller, the controller controls the loading robot 4 to move the cardboard 8 on the circular conveyor line 3 to the loading mechanism of the folder gluer 6; when the full-material sensor of the folder gluer 6 sends a full-material signal to the controller, the loading robot 4 stops the transportation. After the controller receives the out-of-material signal, when the controller detects that the circular track 31 performing intermittent motion is in a stationary state, and there is a transfer frame 32 in a non-empty frame state near the loading robot 4, the controller controls the loading robot 4 to move the cardboard 8 in the transfer frame 32 to the loading mechanism of the folder gluer 6. In addition, if the transfer frame 32 in a non-empty frame state is far away from the loading robot 4, the loading robot 4 can move to the vicinity of the transfer frame 32 through the slide rail device 5 to transport the cardboard 8 in the transfer frame 32.

[0056] The utility model realizes the effective transfer of cardboard 8 between the cardboard printing device and the folder gluer 6 on the packaging box production line through the cooperation of the robot, the material receiving component 1 and the circulating conveyor line 3, without manual handling, improving work efficiency and reducing costs; through the reciprocating motion of the two material receiving frames 12 and the alternating material receiving, the continuous material receiving of the material receiving component 1 is realized, and the work efficiency is improved. In addition, while the material receiving component 1 is receiving materials, the handling robot 2 can carry the cardboard 8 in the material receiving frame 12 located at the waiting station to the circulating conveyor line 3, and the loading robot 4 can carry the cardboard 8 on the circulating conveyor line 3 to the folder gluer 6, improving work efficiency.

[0057] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A cardboard transfer device, used for transferring cardboard on a packaging box production line, characterized in that: The system comprises, in sequence along the conveying direction of the cardboard (8), a material receiving assembly (1), a handling robot (2), a circulating conveying line (3), and a plurality of loading robots (4) for loading materials corresponding to the folder-gluing machine (6); The receiving assembly (1) is located downstream of a conveying mechanism (7) at a paper outlet of a die-cutting machine, and comprises a fixed frame (11), two receiving frames (12) slidably mounted on the top of the fixed frame (11), and a first driving mechanism (13) for driving the receiving frames (12) to reciprocate; the receiving frames (12) are located at the end of a conveying surface of the conveying mechanism (7), the moving direction of the receiving frames (12) is perpendicular to the conveying direction of the conveying mechanism (7), and the two receiving frames (12) are arranged side by side along the moving direction of the receiving frames (12); The circulating conveying line (3) comprises a circular track (31) located between the material receiving assembly (1) and the folder-gluing machine (6) and a plurality of transfer frames (32) installed at intervals on the top of the circular track (31).

2. The cardboard transfer device according to claim 1, characterized in that: The paperboard transfer device is also provided with a controller; The material receiving component (1) further comprises a first sensor for detecting whether there is a cardboard (8) in the material receiving frame (12); The circulating conveyor line (3) further comprises a second sensor for detecting whether there is a cardboard (8) in the transfer frame (32); The conveying mechanism (7), the first sensor, the first driving mechanism (13), the handling robot (2), the circular track (31), the second sensor, the loading robot (4) and the folder-gluing machine (6) are respectively connected to the controller.

3. The cardboard transfer device according to claim 1, characterized in that: The circular track (31) includes two semicircular arc segments and two straight line segments; the outer side of the semicircular arc segment is arranged close to the material receiving assembly (1), and the handling robot (2) is located on the inner side of the semicircular arc segment; the outer side of the straight line segment is arranged close to the folder gluer (6), and the loading robot (4) is located between the straight line segment and the corresponding folder gluer (6).

4. The cardboard transfer device according to claim 1, characterized in that: A slide rail device (5) is provided below the loading robot (4) for enabling the loading robot (4) to perform reciprocating motion.

5. The cardboard transfer device according to claim 1, characterized in that: A receiving opening for receiving cardboard (8) is provided at the top of the receiving frame (12), the receiving opening is located at the end of the conveying surface of the conveying mechanism (7), and the receiving opening is flush with or lower than the conveying surface of the conveying mechanism (7); a first notch (121) for avoiding the clamping end of the transport robot (2) is provided on the side wall of the receiving frame (12) away from the conveying mechanism (7); a first avoidance groove (122) is provided at the bottom of the receiving frame (12), and the upper and lower ends of the first notch (121) are respectively connected to the receiving opening and the first avoidance groove (122).

6. The cardboard transfer device according to claim 5, characterized in that: The material receiving opening is in a flared shape extending in all directions.

7. The cardboard transfer device according to claim 1, characterized in that: The top of the transfer frame (32) is provided with a loading opening, the side wall of the transfer frame (32) is provided with a second notch (321), the bottom of the transfer frame (32) is provided with a second avoidance groove (322), and the upper and lower ends of the second notch (321) are respectively connected to the loading opening and the second avoidance groove (322).

8. The cardboard transfer device according to claim 7, characterized in that: The transfer frame (32) comprises a bottom plate and front, rear and left baffles fixedly mounted on the upper surface of the bottom plate and forming a rectangular cavity, and the second notch (321) is located on the right side of the front baffle of the transfer frame (32).

9. The cardboard transfer device according to claim 1, characterized in that: The clamping end of the handling robot (2) comprises a first upper clamping plate (21), a first lower clamping plate (22), and a second driving mechanism for driving the two to open and close.

10. The cardboard transfer device according to claim 1, characterized in that: The clamping end of the feeding robot (4) comprises a second upper clamping plate (41), a second lower clamping plate (42) and a third driving mechanism for driving the two to open and close.

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