Packaging box clamping unit

Abstract

The invention relates to the technical field of packaging box production, in particular to a packaging box clamping unit which comprises a conveying frame rotationally connected with a conveying belt, multiple sets of conveying plates are laid on the conveying belt, and the packaging box clamping unit is characterized by further comprising a clamping assembly used for clamping a packaging box body and comprising two sets of mounting plates, and two sets of clamping blocks are arranged between the two sets of mounting plates in a sliding mode; the fixing assembly is used for limiting and fixing the two groups of clamping blocks; through cooperation of a rotating shaft and a guide rod, two sets of clamping blocks get close to each other, a packaging box body is clamped, in the clamping process, a buffer block abuts against the packaging box body, gas in a first gas bag is exhausted to a second gas bag, and the second gas bag expands to push the end of a second fixing block to move out of a fixing groove; at the moment, a clamping block is inserted into a clamping groove, an elastically-arranged clamping rod is limited, the clamping rod does not move any more, meanwhile, through cooperation of a first beveling groove and a triggering block, a fixing rod is inserted into a fixing hole, and the clamping block is limited.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging box production, and particularly to a clamping unit for a packaging box. Background Art

[0002] A packaging box, as the name implies, is a box used to package products. It can be classified according to materials, such as: paper box, iron box, wooden box, cloth box, leather box, acrylic box, corrugated packaging box, PVC box, etc.; After the production of a rigid packaging box, it needs to be conveyed through a conveyor belt. In the prior art, a clamping unit for a packaging box disclosed in Chinese Utility Model with the publication number CN111891637A includes a clamping mechanism A and a clamping mechanism B. A clamping area for clamping and accommodating the packaging box is formed between the clamping mechanism A and the clamping mechanism B. An upper part of the clamping area forms a clamping opening for the packaging box to enter the clamping area, and the clamping opening is in states A1 and A2; State A1 is: the clamping opening is open, and the packaging box enters the clamping area; State A2 is: the clamping opening is closed, and the packaging box entering the clamping area is constrained; the height of the clamping area is set as an adjustable structure. By adopting the above scheme, the clamping requirements of packaging boxes with different height dimensions can be adapted, so that the problem that the clamping conveyor line of the packaging box in the prior art is difficult to adapt to the conveying requirements of packaging boxes with different dimensions can be well solved; However, when clamping a special-shaped packaging box, since it is difficult to measure the size of the special-shaped packaging box, when the clamping mechanism clamps the special-shaped packaging box, it is difficult to accurately adjust the clamping area of the clamping mechanism, and it is easy to cause the situation that the clamping mechanism deforms the special-shaped packaging box. Summary of the Invention

[0003] The purpose of the present invention is to provide a clamping unit for a packaging box to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A clamping unit for a packaging box includes a conveying frame. Both ends of the conveying frame are rotatably provided with conveying wheels, and a conveying motor is installed on a side wall of the conveying frame corresponding to one group of the conveying wheels. An output end of the conveying motor is connected to the corresponding conveying wheel, and a conveying belt is sleeved between the two groups of conveying wheels. A plurality of groups of spaced-apart conveying plates are laid on an outer surface of the conveying belt for conveying a packaging box body, and a first fixing block is provided between each of the conveying plates and the conveying belt. Each of the conveying plates is connected to the conveying belt through the corresponding first fixing block. It is characterized in that it further includes: A clamping assembly, which is installed on each of the conveying plates and is used for clamping the packaging box body. The clamping assembly includes two groups of symmetrically distributed mounting plates, and two groups of symmetrically distributed clamping blocks are slidably arranged between the two groups of mounting plates; A fixing component is used to limit and fix two groups of the clamping blocks arranged slidably. The fixing component includes a fixing rod elastically connected to the clamping block, and a plurality of groups of fixing holes are arranged at intervals on the upper surface of the conveying plate corresponding to the position of the fixing rod.

[0005] Preferably, the two mounting plates are respectively mounted at the two end portions of each conveying plate, and sinking grooves are provided at the upper end portions of the two mounting plates. A rotating shaft is rotatably arranged inside each sinking groove. Guide rods are inserted at both ends inside each sinking groove. Through holes are provided at the end portions of each guide rod corresponding to the position of the rotating shaft, and the rotating shaft is inserted inside each through hole. First limiting grooves are provided on the outer surfaces at both ends of each rotating shaft. The two first limiting grooves have opposite thread turning directions, and first limiting blocks are arranged at the positions corresponding to the corresponding first limiting grooves inside each through hole. The first limiting blocks are inserted inside the corresponding first limiting grooves.

[0006] Preferably, the two ends of the two clamping blocks are fixedly connected to the upper end portions of the corresponding two guide rods. The two clamping blocks approach or move away from each other through the cooperation of the rotating shaft and the guide rod. Clamping rods are inserted at the central positions of the side walls on the sides where the two clamping blocks approach each other. Second return springs are arranged between each clamping rod and the inside of the corresponding clamping block. The clamping rod is elastically connected to the clamping block through the second return spring. A limiting component is arranged at the position corresponding to the clamping rod inside the clamping block for limiting the elastically arranged clamping rod.

[0007] Preferably, the limiting component includes a plurality of groups of clamping grooves arranged at intervals on the side wall of the clamping rod. A second receiving groove is provided at the position corresponding to one of the clamping grooves inside the clamping block. A clamping block is inserted inside the second receiving groove, and a third receiving groove is provided between the end portion of the clamping block and the inner wall of the second receiving groove. The clamping block is elastically inserted inside one of the clamping grooves through the third receiving groove. A control component is arranged at the position corresponding to the clamping block inside the clamping block for controlling the elastic clamping block to pop out.

[0008] Preferably, the control component includes a fixing groove provided on the side wall of the clamping block. A third receiving groove is provided at the position corresponding to the fixing groove inside the clamping block. A second fixing block is inserted inside the third receiving groove, and a fourth return spring is arranged between the end portion of the second fixing block and the inner wall of the third receiving groove. A second limiting groove is formed on the inner side wall of the third receiving groove, a second limiting block is slidably arranged inside the second limiting groove, the second limiting block is connected to the second fixed block, and a second air bag is arranged between the side wall of the second limiting block and one inner end of the second limiting groove.

[0009] Preferably, a first receiving groove is provided on the side wall of the clamping block at a position corresponding to the packaging box body, a buffer block is inserted and arranged inside the first receiving groove, and a third return spring is arranged between the side wall of the buffer block and the inner wall of the first receiving groove, and the buffer block is in elastic contact with the side wall of the packaging box body through the third return spring; A first airbag is arranged between the side wall of the buffer block and the inner wall of the first receiving groove, a first exhaust pipe is opened between the first airbag and the corresponding second airbag, and the second airbag is connected to the first airbag through the first exhaust pipe.

[0010] Preferably, a clearance groove is provided inside the clamping block at a position corresponding to the second receiving groove, and the clearance groove is communicated with the second receiving groove; A first bevel groove is provided at the upper end of the clamping block at a position corresponding to the position of the make way groove, a supporting rod is inserted into the interior of the make way groove at a position corresponding to the position of the first bevel groove, a trigger block is provided on the outer surface of the supporting rod, and a groove is provided inside the clamping block at a position corresponding to the position of the trigger block.

[0011] Preferably, a second bevel groove is formed on the side wall of the trigger block, a second through groove is formed on the side wall of the clamping block at a position corresponding to the second bevel groove, an insertion rod is inserted into the interior of the second through groove, and one end of the insertion rod is inserted into the interior of the second bevel groove through the second through groove; A third limiting groove is formed on the inner side wall of the second through groove, a third limiting block is slidably arranged inside the third limiting groove, the third limiting block is connected to the insertion rod, and a sixth return spring is arranged between the side wall of the third limiting block and the inner side wall of the third limiting groove, and the end of the insertion rod is elastically inserted into the interior of the second bevel groove through the sixth return spring.

[0012] Preferably, the clamping block is provided with connecting columns on both sides of the horizontal position corresponding to the other end of the insertion rod, the bottom end of the connecting column is provided with a countersunk hole, the fixing rod is inserted into the inside of the countersunk hole, and a first return spring is provided between the end of the fixing rod and the inner top end corresponding to the countersunk hole, and the fixing rod is elastically arranged in the inside of the countersunk hole through the first return spring; A first through groove is formed in the inner side wall of the counterbore at a height position corresponding to the insertion rod. The first through groove penetrates through the side wall of the connecting column, and a connecting rod is arranged at the ends of the two fixing rods through the first through groove.

[0013] Preferably, an air storage cavity is formed at the top end of the clamping block at a position corresponding to the connecting rod. An extrusion block is hermetically and slidably arranged inside the air storage cavity, and a fifth return spring is arranged between the end of the extrusion block and the inner top end of the air storage cavity. A second exhaust pipeline is formed between the fifth return spring and the top of the corresponding groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the rotating shaft and the guide rod, the present invention realizes the mutual approach of the two clamping blocks to clamp the packaging box body. During the clamping process, the elastically arranged clamping rod is abutted by the side wall of the packaging box body. When the elastically arranged buffer block is abutted by the packaging box body, the buffer block extrudes the first airbag, and the gas inside the first airbag is discharged to the second airbag through the first exhaust pipeline. The second airbag expands and pushes the end of the second fixing block out of the fixing groove. At this time, the elastically arranged clamping block is no longer limited by the second fixing block and is inserted into the clamping groove to limit the elastically arranged clamping rod, so that the clamping rod no longer moves, realizing the clamping of the packaging box body. At the same time, when the clamping block moves, through the cooperation of the first bevel groove, it abuts the abutting rod upward, and then through the cooperation of the trigger block, the insertion rod inserted into the second bevel groove moves toward the side away from the connecting rod. When the insertion rod moves out from the bottom of the connecting rod, the elastically arranged fixing rod is inserted into the corresponding fixing hole to complete the limitation of the slidably arranged clamping block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is an exploded schematic diagram of the conveyor frame and conveyor plate structures of the present invention; Figure 3 is a schematic diagram of the clamping assembly of the present invention clamping the packaging box body; Figure 4 is a schematic diagram of the connection between the conveyor plate and the mounting plate of the present invention; Figure 5 is a schematic diagram of the connection between the clamping block and the rotating shaft of the present invention; Figure 6 is a schematic diagram of the connection between the rotating shaft and the guide rod of the present invention; Figure 7 is a sectional schematic diagram of the connection between the clamping block and the fixing rod of the present invention; Figure 8 is a sectional schematic diagram when the clamping rod of the present invention clamps the packaging box body; Figure 9 for Figure 8 A schematic diagram of the structure enlargement in the middle; Figure 10 for Figure 8 A magnified schematic diagram of the structure at B in the middle; Figure 11 for Figure 10 A magnified schematic diagram of the structure at C in the middle; Figure 12 It is a vertical cross-sectional schematic diagram of the connection between the clamping block and the clamping rod structure of the present invention; Figure 13 for Figure 12 A magnified schematic diagram of the structure at D in the middle; Figure 14 It is a transverse cross-sectional schematic diagram of the connection between the clamping block and the clamping rod structure of the present invention; Figure 15 for Figure 14 The enlarged schematic diagram of the structure at E in the middle; Figure 16 It is a schematic diagram of the connection between the trigger block and the clamping block structure of the present invention.

[0016] In the figure: 1. Conveying frame; 2. Conveying motor; 3. Conveying plate; 4. Clamping block; 5. Packing box body; 6. Conveying belt; 7. First fixing block; 8. Conveying wheel; 9. Mounting plate; 10. Clamping rod; 11. Connecting column; 12. Sinking groove; 13. Rotating shaft; 14. First limiting groove; 15. Fixing hole; 16. Guide rod; 17. Buffer block; 18. Through hole; 19. First limiting block; 20. Sinking hole; 21. Fixing rod; 22. First return spring; 23. First through groove; 24. Connecting rod; 25. Second return spring; 26. First receiving groove; 27. Third return spring; 28. First airbag; 29. First Exhaust duct; 30, second receiving groove; 31, snap-in block; 32, snap-in groove; 33, fixing groove; 34, third receiving groove; 35, fourth return spring; 36, second fixing block; 37, second limiting groove; 38, second air bag; 39, second limiting block; 40, first bevel groove; 41, give way groove; 42, support rod; 43, groove; 44, trigger block; 45, extrusion block; 46, air storage chamber; 47, fifth return spring; 48, second exhaust duct; 49, second bevel groove; 50, second through groove; 51, third limiting groove; 52, third limiting block; 53, sixth return spring; 54, plug rod. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0019] As Figure 1-16 shown, this application provides a packing box clamping unit, which includes a conveying frame 1. Conveying wheels 8 are rotatably arranged at both ends of the conveying frame 1. A conveying motor 2 is installed on the side wall of the conveying frame 1 corresponding to the position of one group of the conveying wheels 8. The output end of the conveying motor 2 is connected to the corresponding conveying wheel 8. A conveying belt 6 is sleeved between the two groups of conveying wheels 8. A plurality of groups of spaced conveying plates 3 are laid on the outer surface of the conveying belt 6 for conveying the packing box body 5. First fixing blocks 7 are arranged between each conveying plate 3 and the conveying belt 6. Each conveying plate 3 is connected to the conveying belt 6 through the corresponding first fixing block 7. In this embodiment: The conveying motor 2 drives the conveying wheel 8 to rotate. During the rotation of the conveying wheel 8, through the cooperation of the conveying belt 6 and the first fixing block 7, a plurality of groups of conveying plates 3 are driven to rotate, thereby conveying the packing box body 5 on the conveying plates 3.

[0020] Specifically, as Figures 3-6 shown, a packing box clamping unit further includes: a clamping assembly installed on each conveying plate 3 for clamping the packing box body 5. The clamping assembly includes two groups of symmetrically distributed mounting plates 9. The two groups of mounting plates 9 are respectively installed at the two end parts of each conveying plate 3. Sinking grooves 12 are provided at the upper end parts of the two groups of mounting plates 9. A rotating shaft 13 is rotatably arranged inside each sinking groove 12. Guide rods 16 are inserted at both ends inside each sinking groove 12. Through holes 18 are provided at the end parts of each guide rod 16 corresponding to the position of the rotating shaft 13. The rotating shaft 13 is inserted inside each through hole 18. First limiting grooves 14 are provided on the outer surfaces of both ends of each rotating shaft 13. The two groups of first limiting grooves 14 have opposite thread turning directions. First limiting blocks 19 are arranged inside each through hole 18 corresponding to the position of the corresponding first limiting groove 14. The first limiting blocks 19 are inserted inside the corresponding first limiting grooves 14. Both ends of the two groups of clamping blocks 4 are fixedly connected to the upper end parts of the corresponding two groups of guide rods 16. The two groups of clamping blocks 4 approach or move away from each other through the cooperation of the rotating shaft 13 and the guide rod 16.

[0021] In this embodiment: Push one set of clamping blocks 4. During the movement of one set of clamping blocks 4, with the cooperation of the guide rod 16, the rotating shaft 13 is driven to rotate. Since the rotation directions of the two sets of first limiting grooves 14 are opposite, the two sets of clamping blocks 4 approach each other to clamp the packaging box body 5.

[0022] Specifically, as Figure 8 shown, clamping rods 10 are inserted at the central positions of the side walls on the sides where the two sets of clamping blocks 4 approach each other, and a second return spring 25 is provided between each clamping rod 10 and the interior of the corresponding clamping block 4. The clamping rod 10 is elastically connected to the clamping block 4 through the second return spring 25; In this embodiment: The clamping block 4 drives the elastically arranged clamping rod 10 to clamp the packaging box body 5.

[0023] Specifically, as Figures 9-11 shown, a limiting component is provided at a position corresponding to the clamping rod 10 inside the clamping block 4 for limiting the elastically arranged clamping rod 10; The limiting component includes a plurality of sets of clamping grooves 32 spaced apart on the side wall of the clamping rod 10. A second receiving groove 30 is opened at a position corresponding to one set of the clamping grooves 32 inside the clamping block 4. A clamping block 31 is inserted into the second receiving groove 30, and a third receiving groove 34 is provided between the end of the clamping block 31 and the inner wall of the second receiving groove 30. The clamping block 31 is elastically inserted into one set of the clamping grooves 32 through the third receiving groove 34; In this embodiment: Under the action of the clamping block 31, the clamping block 31 is elastically inserted into one set of the clamping grooves 32, and the limiting of the clamping rod 10 can be completed.

[0024] Specifically, as Figures 9-11 shown, a control component is provided at a position corresponding to the clamping block 31 inside the clamping block 4 for controlling the elastic ejection of the clamping block 31; The control component includes a fixing groove 33 opened on the side wall of the clamping block 31. A third receiving groove 34 is opened at a position corresponding to the fixing groove 33 inside the clamping block 4. A second fixing block 36 is inserted into the third receiving groove 34, and a fourth return spring 35 is provided between the end of the second fixing block 36 and the inner wall of the third receiving groove 34; A second limiting groove 37 is formed in the inner side wall of the third storage groove 34. A second limiting block 39 is slidably arranged in the second limiting groove 37. The second limiting block 39 is connected to the second fixing block 36, and a second airbag 38 is arranged between the side wall of the second limiting block 39 and one end of the inner part of the second limiting groove 37; A first storage groove 26 is formed in the side wall of the clamping block 4 corresponding to the position of the packaging box body 5. A buffer block 17 is inserted into the first storage groove 26, and a third return spring 27 is arranged between the side wall of the buffer block 17 and the inner wall of the first storage groove 26. The buffer block 17 is elastically contacted with the side wall of the packaging box body 5 through the third return spring 27; A first airbag 28 is arranged between the side wall of the buffer block 17 and the inner wall of the first storage groove 26. A first exhaust pipeline 29 is formed between the first airbag 28 and the corresponding second airbag 38. The second airbag 38 is communicated with the first airbag 28 through the first exhaust pipeline 29; In this embodiment: when the clamping block 4 clamps the packaging box body 5, when the elastically arranged buffer block 17 is abutted by the packaging box body 5, the buffer block 17 squeezes the first airbag 28, and the gas inside the first airbag 28 is discharged to the second airbag 38 through the first exhaust pipeline 29. The second airbag 38 expands to push the end of the second fixing block 36 out of the fixing groove 33. At this time, the elastically arranged clamping block 31 is no longer limited by the second fixing block 36 and is inserted into the clamping groove 32.

[0025] Specifically, as Figure 4 and Figure 7 shown, connecting columns 11 are arranged on both sides of the clamping block 4. A counterbore 20 is formed at the bottom end of the connecting column 11. The fixing rod 21 is inserted into the counterbore 20, and a first return spring 22 is arranged between the end of the fixing rod 21 and the top end of the inner part of the corresponding counterbore 20. The fixing rod 21 is elastically arranged in the counterbore 20 through the first return spring 22; A first through groove 23 is formed in the inner side wall of the counterbore 20 corresponding to the height position of the insertion rod 54. The first through groove 23 penetrates through the side wall of the connecting column 11, and a connecting rod 24 is arranged at the ends of the two fixing rods 21 through the first through groove 23; In this embodiment: the elastically arranged fixing rod 21 is controlled to expand and contract through the connecting rod 24. At the same time, a plurality of fixing holes 15 which are distributed at intervals are formed in the upper end surface of the conveying plate 3 corresponding to the end position of the fixing rod 21. When the elastically arranged fixing rod 21 is inserted into the fixing holes 15, the sliding fixation of the clamping block 4 can be realized.

[0026] Specifically, as Figures 12-16As shown, a relief groove 41 is formed at a position corresponding to the second storage groove 30 inside the clamping block 4, and the relief groove 41 communicates with the second storage groove 30; A first bevel groove 40 is formed at the upper end of the clamping block 31 corresponding to the position of the relief groove 41. A holding rod 42 is inserted at a position corresponding to the first bevel groove 40 inside the relief groove 41. A trigger block 44 is arranged on the outer surface of the holding rod 42, and a groove 43 is formed inside the clamping block 4 corresponding to the position of the trigger block 44; A second bevel groove 49 is formed on the side wall of the trigger block 44. A second through groove 50 is formed on the side wall of the clamping block 4 corresponding to the position of the second bevel groove 49. A plug rod 54 is inserted inside the second through groove 50, and one end of the plug rod 54 is inserted into the second bevel groove 49 through the second through groove 50; A third limiting groove 51 is formed on the inner side wall of the second through groove 50. A third limiting block 52 is slidably arranged inside the third limiting groove 51. The third limiting block 52 is connected to the plug rod 54, and a sixth return spring 53 is arranged between the side wall of the third limiting block 52 and the inner side wall of the third limiting groove 51. The end of the plug rod 54 is elastically inserted into the second bevel groove 49 through the sixth return spring 53; In this embodiment: When the clamping block 31 moves, through the cooperation of the first bevel groove 40, the holding rod 42 is upwardly abutted, and then through the cooperation of the trigger block 44, the plug rod 54 inserted into the second bevel groove 49 moves towards the side away from the connecting rod 24. When the plug rod 54 moves out from the bottom of the connecting rod 24, the elastically arranged fixing rod 21 is inserted into the corresponding fixing hole 15 to complete the limitation of the slidably arranged clamping block 4.

[0027] Specifically, as Figure 15 shown, an air storage cavity 46 is formed at the top of the clamping block 4 corresponding to the position of the connecting rod 24. A pressing block 45 is hermetically and slidably arranged inside the air storage cavity 46, and a fifth return spring 47 is arranged between the end of the pressing block 45 and the inner top of the air storage cavity 46. A second exhaust pipe 48 is formed between the fifth return spring 47 and the top of the corresponding groove 43; In this embodiment: When it is necessary to take out the packaging box body 5, lift the connecting rod 24 upwards. The connecting rod 24 drives the fixing rod 21 to move out of the fixing hole 15. At this time, the movable clamping block 4 can be moved towards the side away from the packaging box body 5. When the connecting rod 24 and the inserting rod 54 are staggered, the inserting rod 54 will not be limited by the connecting rod 24. Then, the extrusion block 45 is extruded by the connecting rod 24. At this time, the air inside the air storage cavity 46 is discharged into the groove 43 through the second exhaust pipe 48 and presses the trigger block 44 downwards. The trigger block 44, through the cooperation of the abutting rod 42 and the first inclined cutting groove 40, abuts the clamping block 31 to one side. At this time, the clamping block 31 moves out of the clamping groove 32, releasing the limit on the clamping rod 10.

[0028] Specifically, the packaging box body 5 is placed between the two clamping blocks 4, and then the connecting rod 24 is lifted upwards to move the fixing rod 21 out of the fixing hole 15. Then, one clamping block 4 is pushed towards the packaging box body 5 to clamp the packaging box body 5. During the clamping process, the elastically arranged clamping rod 10 is abutted by the side wall of the packaging box body 5. When the elastically arranged buffer block 17 is abutted by the packaging box body 5, the buffer block 17 squeezes the first airbag 28. The gas inside the first airbag 28 is discharged into the second airbag 38 through the first exhaust pipe 29. The second airbag 38 expands and pushes the end of the second fixing block 36 out of the fixing groove 33. At this time, the elastically arranged clamping block 31 is no longer limited by the second fixing block 36 and is inserted into the clamping groove 32 to limit the elastically arranged clamping rod 10, so that the clamping rod 10 no longer moves, realizing the clamping of the packaging box body 5. At the same time, when the clamping block 31 moves, through the cooperation of the first inclined cutting groove 40, it abuts the abutting rod 42 upwards. Furthermore, through the cooperation of the trigger block 44, the inserting rod 54 inserted into the second inclined cutting groove 49 moves towards the side away from the connecting rod 24. When the inserting rod 54 moves out from the bottom of the connecting rod 24, the elastically arranged fixing rod 21 is inserted into the corresponding fixing hole 15, completing the limit on the slidably arranged clamping block 4.

[0029] Those of ordinary skill in the art should understand that: The discussion of any above embodiment is only exemplary; Under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. There are many other variations in different aspects of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0030] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A packaging box clamping unit, comprising a conveying frame (1), wherein conveying wheels (8) are rotatably arranged at both ends of the conveying frame (1), and a conveying motor (2) is installed on the side wall of the conveying frame (1) corresponding to one set of the conveying wheels (8). The output end of the conveying motor (2) is connected to the corresponding conveying wheel (8), and a conveying belt (6) is sleeved between the two sets of conveying wheels (8). A plurality of sets of conveying plates (3) are distributed at intervals on the outer surface of the conveying belt (6) for conveying the packaging box body (5), and a first fixing block (7) is arranged between each conveying plate (3) and the conveying belt (6). Each conveying plate (3) is connected to the conveying belt (6) through the corresponding first fixing block (7): It is characterized in that, Further included are: a clamping assembly, mounted on each of the conveying plates (3), for clamping the packaging box body (5), the clamping assembly including two groups of symmetrically distributed mounting plates (9), and two groups of symmetrically distributed clamping blocks (4) are slidably arranged between the two groups of mounting plates (9); a fixing assembly, for limiting and fixing the two slidably arranged clamping blocks (4), the fixing assembly including a fixing rod (21) elastically connected to the clamping block (4), and a plurality of groups of spaced fixing holes (15) are formed in the upper surface of the conveying plate (3) corresponding to the position of the fixing rod (21).

2. The packaging box clamping unit according to claim 1, wherein The two groups of mounting plates (9) are respectively mounted at both ends of each of the conveying plates (3), and sink grooves (12) are formed at the upper ends of the two groups of mounting plates (9), and a rotating shaft (13) is rotatably arranged inside each of the sink grooves (12); Guide rods (16) are inserted at both ends inside each of the sink grooves (12), through holes (18) are formed at the end parts of each of the guide rods (16) corresponding to the position of the rotating shaft (13), and the rotating shaft (13) is inserted inside each of the through holes (18); First limiting grooves (14) are formed on the outer surfaces at both ends of each of the rotating shafts (13), the thread turning directions of the two groups of first limiting grooves (14) are opposite, and first limiting blocks (19) are arranged at the positions corresponding to the first limiting grooves (14) inside each of the through holes (18), and the first limiting blocks (19) are inserted inside the corresponding first limiting grooves (14).

3. The clamping unit for a packaging box according to claim 2, wherein, Both ends of the two groups of clamping blocks (4) are fixedly connected to the upper end parts of the corresponding two groups of guide rods (16), and the two groups of clamping blocks (4) approach or move away from each other through the cooperation of the rotating shaft (13) and the guide rod (16); Clamping rods (10) are inserted at the central positions of the side walls on the sides where the two groups of clamping blocks (4) approach each other, and a second return spring (25) is arranged between each of the clamping rods (10) and the inside of the corresponding clamping block (4), and the clamping rod (10) is elastically connected to the clamping block (4) through the second return spring (25); A limiting assembly is arranged at the position corresponding to the clamping rod (10) inside the clamping block (4), for limiting the elastically arranged clamping rod (10).

4. The holding unit for a packaging box according to claim 3, wherein, The limiting assembly includes a plurality of groups of spaced clamping grooves (32) formed on the side wall of the clamping rod (10), a second receiving groove (30) is formed in the inside of the clamping block (4) corresponding to one of the clamping grooves (32), a clamping block (31) is inserted inside the second receiving groove (30), and a third receiving groove (34) is arranged between the end part of the clamping block (31) and the inner wall of the second receiving groove (30), and the clamping block (31) is elastically inserted inside one of the clamping grooves (32) through the third receiving groove (34); A control assembly is arranged at the position corresponding to the clamping block (31) inside the clamping block (4), for controlling the elastically arranged clamping block (31) to pop out.

5. A packaging box clamping unit according to claim 4, wherein, The control assembly comprises a fixing groove (33) provided on a side wall of the clamping block (31); a third receiving groove (34) is provided inside the clamping block (4) at a position corresponding to the fixing groove (33); a second fixing block (36) is inserted into the third receiving groove (34); and a fourth return spring (35) is provided between an end of the second fixing block (36) and an inner wall of the third receiving groove (34); A second limiting groove (37) is provided on an inner side wall of the third receiving groove (34), a second limiting block (39) is slidably provided inside the second limiting groove (37), the second limiting block (39) is connected to the second fixing block (36), and a second air bag (38) is provided between the side wall of the second limiting block (39) and an inner end of the second limiting groove (37).

6. The holding unit for a packaging box according to claim 5, wherein, A first receiving groove (26) is provided on the side wall of the clamping block (4) at a position corresponding to the packaging box body (5); a buffer block (17) is inserted into the interior of the first receiving groove (26); a third return spring (27) is provided between the side wall of the buffer block (17) and the inner wall of the first receiving groove (26); the buffer block (17) is in elastic contact with the side wall of the packaging box body (5) via the third return spring (27); A first airbag (28) is provided between the side wall of the buffer block (17) and the inner wall of the first receiving groove (26), a first exhaust pipe (29) is provided between the first airbag (28) and the corresponding second airbag (38), and the second airbag (38) is connected to the first airbag (28) through the first exhaust pipe (29).

7. A packaging box clamping unit according to claim 5, characterized in that, A clearance groove (41) is provided inside the clamping block (4) at a position corresponding to the second receiving groove (30), and the clearance groove (41) is communicated with the second receiving groove (30); A first bevel groove (40) is provided at the upper end of the clamping block (31) at a position corresponding to the clearance groove (41); a supporting rod (42) is inserted and provided inside the clearance groove (41) at a position corresponding to the first bevel groove (40); a trigger block (44) is provided on the outer surface of the supporting rod (42); and a groove (43) is provided inside the clamping block (4) at a position corresponding to the trigger block (44).

8. The holding unit for a packaging box according to claim 7, wherein, A second bevel groove (49) is formed on the side wall of the trigger block (44); a second through groove (50) is formed on the side wall of the clamping block (4) at a position corresponding to the second bevel groove (49); an insertion rod (54) is inserted into the interior of the second through groove (50); one end of the insertion rod (54) is inserted into the interior of the second bevel groove (49) through the second through groove (50); A third limiting groove (51) is formed in the inner side wall of the second through groove (50). A third limiting block (52) is slidably arranged in the third limiting groove (51). The third limiting block (52) is connected to the inserting rod (54). A sixth reset spring (53) is arranged between the side wall of the third limiting block (52) and the inner side wall of the third limiting groove (51). The end of the inserting rod (54) is elastically inserted into the second bevel groove (49) through the sixth reset spring (53).

9. The clamping unit for a packaging box according to claim 8, characterized in that, Two connecting columns (11) are arranged on both sides of the clamping block (4) at the horizontal position corresponding to the other end of the inserting rod (54). A counterbore (20) is formed at the bottom end of the connecting column (11). The fixing rod (21) is inserted into the counterbore (20). A first reset spring (22) is arranged between the end of the fixing rod (21) and the inner top end of the corresponding counterbore (20). The fixing rod (21) is elastically arranged in the counterbore (20) through the first reset spring (22). A first through groove (23) is formed in the inner side wall of the counterbore (20) at the height position corresponding to the inserting rod (54). The first through groove (23) penetrates through the side wall of the connecting column (11). A connecting rod (24) is arranged at the ends of the two fixing rods (21) through the first through groove (23).

10. A packaging box clamping unit according to claim 9, characterized in that, An air storage cavity (46) is formed in the clamping block (4) at the position corresponding to the connecting rod (24). An extrusion block (45) is hermetically and slidably arranged in the air storage cavity (46). A fifth reset spring (47) is arranged between the end of the extrusion block (45) and the inner top end of the air storage cavity (46). A second exhaust duct (48) is formed between the fifth reset spring (47) and the top of the corresponding groove (43).

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