Automatic blank picking unit and blank stacking method for a packaging box

Abstract

The present invention discloses a blank automatic picking and stacking unit for a packaging box and a blank stacking method, which includes a conveying mechanism, a lifting mechanism and a blank stacking bottom plate. A blank stacking mechanism is arranged at the top of the conveying mechanism, and a blank stacking frame is arranged on the front surface of the lifting mechanism. The lifting mechanism is used to move the blank stacking frame up and down. The blank stacking frame includes an inverted U-shaped frame. A blank stacking bottom plate is slidably placed below the inverted U-shaped frame. A plurality of clamping plates are slidably connected at equal distances on the top of the inner wall of the inverted U-shaped frame. A guide rod penetrates through the inverted U-shaped frame and extends above the inverted U-shaped frame. An adjusting mechanism is arranged above the inverted U-shaped frame. The present invention relates to the technical field of packaging box blank production. Through starting the driving motor, the support plate drives the adjusting plate to move, and through the cooperation of the adjusting groove, the guide rod moves at equal distances, that is, the distance between the clamping plates changes at equal distances, so that blank materials of different sizes of packaging boxes can be stacked in the inverted U-shaped frame in the blank automatic picking and stacking unit for the packaging box and the blank stacking method of the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of production of packaging box blanks, and specifically relates to an automatic blank picking and stacking unit for a packaging box and a blank stacking method. Background Art

[0002] As the name implies, a packaging box is a box used to package products, and can be classified by materials such as: paper box, iron box, wooden box, cloth box, leather box, acrylic box, corrugated packaging box, PVC box, etc. When a packaging box is produced, it is an unfolded blank, and after folding, it becomes a complete packaging box. When the packaging box blank is produced, it needs to be picked up and stacked. Existing devices for picking up and stacking packaging box blanks can only stack blanks of a single size during use. However, a packaging box production line does not only produce packaging boxes of one size, so multiple picking-up devices are required to pick up and stack packaging box blanks of different sizes, which undoubtedly increases the equipment cost. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an automatic blank picking and stacking unit for a packaging box and a blank stacking method, which solves the problem that existing packaging box picking-up devices cannot pick up and stack packaging box blanks of different sizes.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An automatic blank picking and stacking unit for a packaging box and a blank stacking method include a conveying mechanism, a lifting mechanism, and a stacking bottom plate. A stacking mechanism is arranged on the top of the conveying mechanism. A stacking frame is arranged on the front of the lifting mechanism. The lifting mechanism is used to move the stacking frame up and down. The stacking frame includes an inverted U-shaped frame. A stacking bottom plate is slidably placed below the inverted U-shaped frame. A plurality of clamping plates are slidably connected at equal intervals to the top of the inner wall of the inverted U-shaped frame. Guide rods are fixedly connected to the tops of the plurality of clamping plates. The guide rods penetrate through the inverted U-shaped frame and extend above the inverted U-shaped frame. An adjustment mechanism is arranged above the inverted U-shaped frame for adjusting the distance between the plurality of clamping plates. The adjustment mechanism includes a protection box and a plurality of fine adjustment mounting components and a limit component arranged in the protection box. A plate feeding mechanism is arranged on the right side of the stacking frame for feeding the stacking bottom plate for stacking. A mechanism for loading and unloading the stacking bottom plate after stacking is arranged on the left side of the plate feeding mechanism.

[0005] Preferably, the adjustment mechanism includes a protective box fixedly connected to the top of the inverted U-shaped frame. A slide bar is fixedly connected between the left and right sides of the inner wall of the protective box. A driving motor is fixedly connected to the left side of the inner wall of the protective box. The output end of the driving motor is fixedly connected to a lead screw. The lead screw is located behind the slide bar. The lead screw penetrates the protective box and the end extending into the interior of the protective box is rotatably connected to the right side of the inner wall of the protective box. A support plate is slidably connected to the surface of the slide bar. The other side of the support plate is threadedly connected to the surface of the lead screw. A plurality of fine adjustment mounting components are arranged on the support plate. The support plate is provided with an adjustment plate through the fine adjustment mounting components. An adjustment slot penetrating up and down is formed in the adjustment plate. The guide rod penetrates the protective box and extends into the interior of the protective box. One end of the guide rod is located inside the adjustment slot.

[0006] Preferably, the fine adjustment mounting component includes a through slot formed in the support plate. An installation frame is slidably connected between the left and right sides of the inner wall of the through slot. The left side of the installation frame is rotatably connected to an adjustment lead screw. The adjustment lead screw penetrates the support plate and extends to the left side of the support plate.

[0007] Preferably, grooves are formed at the four corners on the top of the installation frame. A clamping rod is slidably connected to the inner surface of the groove. A first limiting spring is fixedly connected between the clamping rod and the inner wall of the groove.

[0008] Preferably, the limiting component includes a connection block fixedly connected to the surface of the guide rod located inside the protective box. Two left and right sliding grooves are formed inside the connection block. A second limiting spring is fixedly connected to the inner wall of the sliding groove. The other end of the second limiting spring is fixedly connected to a limiting block. The limiting block penetrates the connection block and extends to the outside of the connection block.

[0009] Preferably, two left and right fixing blocks are fixedly connected to the top of the inner wall of the protective box. A plurality of limiting grooves matching with the limiting blocks are equally spaced on the opposite sides of the two left and right fixing blocks.

[0010] Preferably, the blank stacking mechanism includes a support frame slidably connected to the left side of the conveying mechanism. A cylinder is fixedly connected to the left side of the support frame. The output end of the cylinder penetrates the support frame and extends to the right side of the support frame. The output end of the cylinder is fixedly connected to a push plate. A moving motor is fixedly connected to the lower left side of the support frame. The output end of the moving motor penetrates the support frame and extends to the right side. The output end of the moving motor is fixedly connected to a gear. A rack is fixedly connected to the bottom of the conveying mechanism. The gear is meshed with the rack for transmission.

[0011] Preferably, a fixing rod is fixedly connected to the front surface of the support frame. The other end of the fixing rod is fixedly connected to a baffle. A push rod is rotatably connected to the surface of the baffle. An arc-shaped strip is fixedly connected to the upper end of the push rod. A torsion spring is sleeved on the surface of the fixing rod between the opposite sides of the push rod and the baffle. One end of the torsion spring is fixedly connected to the surface of the fixing rod, and the other end of the torsion spring is fixedly connected to the front surface of the push rod. A switch is fixedly connected to the front surface of the support frame, and the switch is located on the right side of the other end of the push rod.

[0012] Preferably, the sheet feeding mechanism includes a support frame. A plurality of blank code bottom plates are stacked on the support frame. Two moving lead screws are rotatably connected to the left side of the support frame. The other ends of the two moving lead screws both penetrate through the support frame and extend to the right side of the support frame. Pulley wheels are fixedly connected to the surfaces of the two moving lead screws on the right side of the support frame. The two pulley wheels are connected by a belt in transmission. An input motor is arranged on the right side of the front support frame. The output end of the input motor is fixedly connected to one end of the front moving lead screw. Connecting sleeves are threadedly connected to the surfaces of the two moving lead screws. The two connecting sleeves both penetrate through the support frame and extend into the interior of the support frame. A push plate is fixedly connected between the opposite sides of the two connecting sleeves. A slide rail for receiving the blank code bottom plate with blanks stacked is arranged on the left side of the support frame.

[0013] The present invention also discloses a blank coding method for the blank automatic picking unit of the packaging box, which specifically includes the following steps:

[0014] Step 1: Start the air cylinder. The air cylinder works and pushes the push plate to move, so that the blank is fed above the blank code bottom plate in the blank code frame. When the next blank enters the support frame, the push plate is pushed again to send it onto the blank code bottom plate. As the number of blanks on the blank code bottom plate increases, the first layer is filled up.

[0015] Step 2: After one layer of blank coding is completed between two adjacent inverted U-shaped frames, start the moving motor. The moving motor rotates to make the gear rotate. The gear rotates and cooperates with the rack to make the support frame move. The stopping position is that the support frame is exactly aligned with the empty slot between the next adjacent clamping plates, so as to continue blank coding.

[0016] Step 3: After the first layer of blank coding is completed in all the empty slots between the clamping plates on the blank code bottom plate, start the lifting mechanism to make the blank code frame move down a distance of one layer, and repeat the above operation to perform the second layer of blank coding, and so on to complete the blank coding operation.

[0017] Step 4: When the size of the packaging box changes, start the driving motor. The driving motor rotates to make the support plate move. The support plate rotates and drives the adjusting plate on the support plate to move, so that the distances between multiple clamping plates change equidistantly.

[0018] Beneficial effects

[0019] The present invention provides an automatic blank picking and stacking unit for a packaging box blank and a blank stacking method. Compared with the prior art, it has the following beneficial effects:

[0020] 1. For the automatic blank picking and stacking unit for the packaging box blank and the blank stacking method, by starting the driving motor, the support plate drives the adjustment plate to move, and through the cooperation of the adjustment slots, the guide rods move equidistantly, that is, the distance between the clamping plates changes equidistantly, so that different-sized packaging box blanks can be stacked in the inverted U-shaped frame.

[0021] 2. For the automatic blank picking and stacking unit for the packaging box blank and the blank stacking method, through the fine-tuning installation component, the adjustment slots in the adjustment plate can be disassembled and replaced when severely worn, and by rotating the adjustment screw rod, the position of the adjustment plate can be finely adjusted, thereby ensuring that the distance between multiple clamping plates remains accurate and ensuring the neatness of the blanks during stacking.

[0022] 3. For the automatic blank picking and stacking unit for the packaging box blank and the blank stacking method, through the limiting component, after the distance between multiple clamping plates is adjusted, the positions between multiple clamping plates can be limited, thereby ensuring the stability of the positions of the clamping plates after adjustment and improving the reliability of the device during use.

[0023] 4. For the automatic blank picking and stacking unit for the packaging box blank and the blank stacking method, through the mechanism, the packaging box blanks can be stacked one by one, and through the push rod, when the stacking mechanism moves, it can accurately stop in the empty slot between adjacent clamping plates, thereby ensuring the accuracy of the position movement of the packaging box during stacking.

[0024] 5. For the automatic blank picking and stacking unit for the packaging box blank and the blank stacking method, through the plate feeding mechanism, the stacked packaging box blanks can be unloaded, and after unloading, the next blank stacking bottom plate can enter the inverted U-shaped frame, thereby ensuring the continuity and automation degree of the device during use. Brief description of the drawings

[0025] Figure 1 is the external view schematic diagram of the present invention;

[0026] Figure 2 is the schematic diagram of the stacking frame of the present invention;

[0027] Figure 3 is the top cross-sectional view of the adjustment mechanism of the present invention;

[0028] Figure 4 is the schematic diagram of the support plate of the present invention;

[0029] Figure 5 is the enlarged view of part A of the present invention;

[0030] Figure 6 Schematic diagram of the limit component of the present invention;

[0031] Figure 7 Schematic diagram of the blank stacking mechanism of the present invention;

[0032] Figure 8 Schematic diagram of position B of the present invention;

[0033] Figure 9 Schematic diagram of the sheet feeding mechanism of the present invention.

[0034] In the figure: 1, conveying mechanism; 2, blank stacking mechanism; 21, support frame; 22, cylinder; 23, push plate; 24, moving motor; 25, gear; 26, rack; 27, fixed rod; 28, baffle; 29, push rod; 210, arc bar; 211, torsion spring; 212, switch; 3, lifting mechanism; 4, blank stacking rack; 41, inverted U-shaped rack; 42, clamping plate; 43, guide rod; 5, adjustment mechanism; 51, protection box; 52, sliding rod; 53, driving motor; 54, lead screw; 55, support plate; 56, fine adjustment installation component; 561, through groove; 562, mounting frame; 563, adjustment lead screw; 564, groove; 565, clamping rod; 566, first limit spring; 57, adjustment plate; 58, adjustment groove; 59, limit component; 591, connecting block; 592, sliding groove; 593, second limit spring; 594, limit block; 595, fixed block; 596, limit groove; 6, sheet feeding mechanism; 61, support frame; 62, moving lead screw; 63, connecting sleeve; 64, push plate; 65, input motor; 66, pulley; 7, slide rail; 8, blank stacking bottom plate. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The blank automatic picking unit of the packaging box provides five technical solutions:

[0037] Such as Figures 1 - 3The first embodiment is shown: including a conveying mechanism 1, a lifting mechanism 3 and a blank stacking bottom plate 8. A blank stacking mechanism 2 is arranged on the top of the conveying mechanism 1. A blank stacking frame 4 is arranged on the front surface of the lifting mechanism 3. The lifting mechanism 3 is used to move the blank stacking frame 4 up and down. The blank stacking frame 4 includes an inverted U-shaped frame 41. A blank stacking bottom plate 8 is slidably placed below the inverted U-shaped frame 41. A plurality of clamping plates 42 are slidably connected at equal intervals on the top of the inner wall of the inverted U-shaped frame 41. Guide rods 43 are fixedly connected to the tops of the plurality of clamping plates 42. The guide rods 43 penetrate through the inverted U-shaped frame 41 and extend above the inverted U-shaped frame 41. An adjusting mechanism 5 is arranged above the inverted U-shaped frame 41 for adjusting the distance between the plurality of clamping plates 42. The adjusting mechanism 5 includes a protection box 51 and a plurality of fine adjustment mounting components 56 and a limit component 59 arranged in the protection box 51. A plate feeding mechanism 6 is arranged on the right side of the blank stacking frame 4 for feeding the blank stacking bottom plate 8 for blank stacking. A mechanism for loading and unloading the blank stacking bottom plate 8 after blank stacking is arranged on the left side of the plate feeding mechanism 6.

[0038] The adjusting mechanism 5 includes a protection box 51. The protection box 51 is fixedly connected to the top of the inverted U-shaped frame 41. A slide bar 52 is fixedly connected between the left side and the right side of the inner wall of the protection box 51. A driving motor 53 is fixedly connected to the left side of the inner wall of the protection box 51. The output end of the driving motor 53 is fixedly connected to a lead screw 54. The lead screw 54 is located behind the slide bar 52. The lead screw 54 penetrates through the protection box 51 and the end extending into the interior of the protection box 51 is rotatably connected to the right side of the inner wall of the protection box 51. A support plate 55 is slidably connected to the surface of the slide bar 52. The other side of the support plate 55 is threadedly connected to the surface of the lead screw 54. A plurality of fine adjustment mounting components 56 are arranged on the support plate 55. The support plate 55 is provided with an adjustment plate 57 through the fine adjustment mounting components 56. An adjustment slot 58 penetrating up and down is formed in the adjustment plate 57. The guide rod 43 penetrates through the protection box 51 and extends into the interior of the protection box 51. One end of the guide rod 43 is located inside the adjustment slot 58.

[0039] By starting the driving motor 53, the support plate 55 drives the adjustment plate 57 to move, and through the cooperation of the adjustment slot 58, the guide rods 43 move at equal intervals, that is, the distance between the clamping plates 42 changes at equal intervals, so that different sizes of packaging box blanks can be stacked in the inverted U-shaped frame 41.

[0040] Such as Figure 4 And 5The second implementation manner is shown, and the main difference from the first implementation manner is that: the fine-tuning installation component 56 includes a through groove 561 opened in the support plate 55, a mounting frame 562 is slidably connected between the left side and the right side of the inner wall of the through groove 561, an adjusting screw rod 563 is rotatably connected to the left side of the mounting frame 562, the adjusting screw rod 563 penetrates through the support plate 55 and extends to the left side of the support plate 55, grooves 564 are opened at the four corners on the top of the mounting frame 562, clamping rods 565 are slidably connected to the inner surfaces of the grooves 564, and a first limiting spring 566 is fixedly connected between the clamping rods 565 and the inner walls of the grooves 564.

[0041] Through the fine-tuning installation component 56, the adjustment slot 58 in the adjustment plate 57 can be disassembled and replaced when it is severely worn, and by rotating the adjustment screw rod 563, the position of the adjustment plate 57 can be finely adjusted, so as to ensure that the distances between multiple clamping plates 42 are accurate and ensure the neatness of the blank during blank stacking.

[0042] The limiting component 59 includes a connecting block 591, the connecting block 591 is fixedly connected to the surface of the guide rod 43 inside the protection box 51, two left and right sliding grooves 592 are opened inside the connecting block 591, a second limiting spring 593 is fixedly connected to the inner wall of the sliding groove 592, and the other end of the second limiting spring 593 is fixedly connected to a limiting block 594, and the limiting block 594 penetrates through the connecting block 591 and extends to the outside of the connecting block 591.

[0043] As Figure 6 The third implementation manner is shown, and the main difference from the second implementation manner is that: two left and right fixing blocks 595 are fixedly connected to the top of the inner wall of the protection box 51, and a plurality of limiting grooves 596 matched with the limiting blocks 594 are equidistantly opened on the opposite sides of the two left and right fixing blocks 595.

[0044] Through the limiting component 59, after the distances between multiple clamping plates 42 are adjusted, the positions between multiple clamping plates 42 can be limited, so as to ensure the stability of the positions of the clamping plates 42 after the position adjustment and improve the reliability of the device during use.

[0045] As Figure 1 、 7Embodiments 4 and 8 are shown, and the main difference from Embodiment 3 is that: the blank stacking mechanism 2 includes a support frame 21, the support frame 21 is slidably connected to the left side of the conveying mechanism 1, a cylinder 22 is fixedly connected to the left side of the support frame 21, the output end of the cylinder 22 penetrates through the support frame 21 and extends to the right side of the support frame 21, a push plate 23 is fixedly connected to the output end of the cylinder 22, a moving motor 24 is fixedly connected to the lower left of the support frame 21, the output end of the moving motor 24 penetrates through the support frame 21 and extends to the right side, a gear 25 is fixedly connected to the output end of the moving motor 24, a rack 26 is fixedly connected to the bottom of the conveying mechanism 1, the gear 25 and the rack 26 are in meshing transmission, a fixed rod 27 is fixedly connected to the front of the support frame 21, the other end of the fixed rod 27 is fixedly connected to a baffle 28, a push rod 29 is rotatably connected to the surface of the baffle 28, an arc-shaped strip 210 is fixedly connected to the upper end of the push rod 29, a torsion spring 211 is sleeved on the surface of the fixed rod 27 between the push rod 29 and the baffle 28 on the opposite side, one end of the torsion spring 211 is fixedly connected to the surface of the fixed rod 27, and the other end of the torsion spring 211 is fixedly connected to the front of the push rod 29. A switch 212 is fixedly connected to the front of the support frame 21, the switch 212 is located on the right side of the other end of the push rod 29, and the switch 212 is a double switch, that is, the moving motor 24 can be controlled simultaneously by two switches. One switch starts the moving motor 24, and the other is used to turn off the moving motor 24, and vice versa.

[0046] The blank stacking mechanism 2 can stack the packaging box blanks one by one, and through the push rod 29, when the blank stacking mechanism 2 moves, it can accurately stop in the empty slot between the adjacent clamping plates 42, thus ensuring the accuracy of the position movement of the packaging box during blank stacking.

[0047] Such as Figure 1 And 9 Embodiment 5 is shown, and the main difference from Embodiment 4 is that: the plate feeding mechanism 6 includes a support frame 61, a plurality of blank stacking bottom plates 8 are stacked on the support frame 61, two front and rear moving lead screws 62 are rotatably connected to the left side of the support frame 61, the other ends of the two moving lead screws 62 penetrate through the support frame 61 and extend to the right side of the support frame 61, pulley 66 is fixedly connected to the surface of the two moving lead screws 62 on the right side of the support frame 61, the two pulleys 66 are connected by a belt in transmission, an input motor 65 is arranged on the right side of the front support frame 61, the output end of the input motor 65 is fixedly connected to one end of the front moving lead screw 62, connecting sleeves 63 are threadedly connected to the surfaces of the two moving lead screws 62, the two connecting sleeves 63 penetrate through the support frame 61 and extend to the inside of the support frame 61, a push plate 64 is fixedly connected between the opposite sides of the two connecting sleeves 63, and a slide rail 7 for receiving the blank stacked bottom plate 8 is arranged on the left side of the support frame 61.

[0048] The feeding mechanism 6 can unload the box blanks with blanks stacked, and after unloading, the next blank-coded bottom plate 8 can enter the inverted U-shaped frame 41, thus ensuring the continuity and automation degree during the use of the device.

[0049] Blank picking and feeding: The produced box blanks enter the conveying mechanism 1 and are conveyed backward through the conveying mechanism 1, and the blanks enter the support frame 21.

[0050] Blank coding: Step 1: Start the cylinder 22. The cylinder 22 works and pushes the push plate 23 to move. The push plate 23 moves and pushes the blank in the support frame 21 to move, so that the blank enters above the blank-coded bottom plate 8 in the blank-coding frame 4, and the blank is located between the front and rear clamping plates 42. When the next blank enters the support frame 21, the push plate 23 is pushed again to send it onto the blank-coded bottom plate 8. As the number of blanks on the blank-coded bottom plate 8 increases, the first layer is filled up.

[0051] Step 2: After one layer of blank coding is completed between two adjacent inverted U-shaped frames 41, start the moving motor 24. The moving motor 24 rotates to make the gear 25 rotate. The gear 25 rotates and, in cooperation with the rack 26, makes the support frame 21 move. As the support frame 21 moves, the arc-shaped bar 210 contacts the next clamping plate 42. The arc-shaped bar 210 contacts the clamping plate 42, so that the push rod 29 rotates. The push rod 29 rotates and makes the other end contact the switch 212, so that the moving motor 24 stops rotating. At this time, the support frame 21 at the stopped position is exactly aligned with the empty slot between the next adjacent clamping plate 42, and then the blank coding continues.

[0052] Step 3: After the first layer of blank coding is completed in all the empty slots between the clamping plates 42 on the blank-coded bottom plate 8, start the lifting mechanism 3 to make the blank-coding frame 4 move down a distance of one layer, and repeat the above operation to perform the second layer of blank coding, and so on, to complete the blank coding operation.

[0053] Step 4: When the size of the box changes, start the driving motor 53. The driving motor 53 rotates to make the support plate 55 move. The support plate 55 rotates and drives the adjusting plate 57 on the support plate 55 to move. The adjusting plate 57 moves and makes a plurality of guide rods 43 move equidistantly through the adjusting slots 58, so that the distances between the plurality of clamping plates 42 change equidistantly.

[0054] When the guide rod 43 moves, the connecting block 591 moves at the same time. The connecting block 591 moves to make the limiting block 594 move. The limiting block 594 moves and, through the cooperation of the second limiting spring 593 and the limiting slot 596, enables the limiting block 594 to freely enter and exit the limiting slot 596, and after the guide rod 43 stops moving, the limiting block 594 enters the limiting slot 596, so as to limit the position of the clamping plate 42.

[0055] When there is a deviation in the distance between the clamping plates 42, rotate the adjustment screw rod 563 to move the through groove 561, thereby adjusting the position of the adjustment plate 57. Additionally, when the inner wall of the adjustment groove 58 in the adjustment plate 57 is severely worn, the adjustment plate 57 can be removed from between the multiple clamping rods 565. When installing the adjustment plate 57, press the adjustment plate 57 from above the four clamping rods 565 into the space between the four clamping rods 565, thereby clamping the adjustment plate 57.

[0056] After the packaging box blanks are palletized in the pallet rack 4, start the lifting mechanism 3 to move the pallet rack 4 to the bottommost position. Start the input motor 65. The rotation of the input motor 65 causes the movement screw rod 62 to rotate. The rotation of the movement screw rod 62 causes the pulley 66 to rotate. The rotation of the pulley 66 causes the pulley 66 located at the rear to rotate through the belt. The rotation of the pulley 66 located at the rear causes the movement screw rod 62 located at the rear to rotate. The two movement screw rods 62 rotate. The rotation of the movement screw rod 62 causes the push plate 64 to move to the left through the connecting sleeve 63. The movement of the push plate 64 pushes the pallet bottom plate 8 located at the lowermost position to move. The movement of the pallet bottom plate 8 ejects the pallet bottom plate 8 in the inverted U-shaped frame 41. The movement of the pallet bottom plate 8 in the inverted U-shaped frame 41 drives the packaging box blanks above it to move, and causes the pallet bottom plate 8 to enter into 9.

[0057] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic blank picking and placing unit for a packaging box, comprising a conveying mechanism (1), a lifting mechanism (3) and a blank stacking bottom plate (8), characterized in that: At the top of the conveying mechanism (1), there is a blank stacking mechanism (2). On the front of the lifting mechanism (3), there is a blank stacking rack (4). The lifting mechanism (3) is used to move the blank stacking rack (4) up and down. The blank stacking rack (4) includes an inverted U-shaped rack (41). A blank stacking bottom plate (8) is slidably placed below the inverted U-shaped rack (41). At equal distances on the top of the inner wall of the inverted U-shaped rack (41), a plurality of clamping plates (42) are slidably connected. At the top of each of the plurality of clamping plates (42), a guide rod (43) is fixedly connected. The guide rod (43) penetrates through the inverted U-shaped rack (41) and extends above the inverted U-shaped rack (41). Above the inverted U-shaped rack (41), there is an adjustment mechanism (5) for adjusting the distance between the plurality of clamping plates (42). The adjustment mechanism (5) includes a protective box (51), a plurality of fine-tuning installation components (56) and a limiting component (59) arranged in the protective box (51). On the right side of the blank stacking rack (4), there is a plate feeding mechanism (6) for feeding the blank stacking bottom plate (8) for blank stacking. On the left side of the plate feeding mechanism (6), there is a mechanism for loading and unloading the blank stacking bottom plate (8) after blank stacking is completed; The adjustment mechanism (5) includes a protective box (51). The protective box (51) is fixedly connected to the top of the inverted U-shaped rack (41). A slide rod (52) is fixedly connected between the left side and the right side of the inner wall of the protective box (51). A driving motor (53) is fixedly connected to the left side of the inner wall of the protective box (51). The output end of the driving motor (53) is fixedly connected to a lead screw (54). The lead screw (54) is located behind the slide rod (52). The lead screw (54) penetrates through the protective box (51) and the end extending into the interior of the protective box (51) is rotatably connected to the right side of the inner wall of the protective box (51). A support plate (55) is slidably connected to the surface of the slide rod (52). The other side of the support plate (55) is threadedly connected to the surface of the lead screw (54). A plurality of fine-tuning installation components (56) are arranged on the support plate (55). The support plate (55) is provided with an adjustment plate (57) through the fine-tuning installation components (56). An adjustment groove (58) penetrating up and down is formed in the adjustment plate (57). The guide rod (43) penetrates through the protective box (51) and extends into the interior of the protective box (51). One end of the guide rod (43) is located inside the adjustment groove (58); The fine-tuning installation component (56) includes a through groove (561) opened through the support plate (55). A mounting frame (562) is slidably connected between the left and right sides of the inner wall of the through groove (561). A adjusting screw rod (563) is rotatably connected to the left side of the mounting frame (562). The adjusting screw rod (563) penetrates through the support plate (55) and extends to the left side of the support plate (55). Grooves (564) are opened at the four corners on the top of the mounting frame (562). A clamping rod (565) is slidably connected to the inner surface of the groove (564). A first limiting spring (566) is fixedly connected between the clamping rod (565) and the inner wall of the groove (564).

2. The automatic blank picking and placing unit for a packaging box according to claim 1, characterized in that: The limiting component (59) includes a connecting block (591). The connecting block (591) is fixedly connected to the surface of the guide rod (43) inside the protection box (51). Two left and right sliding grooves (592) are opened inside the connecting block (591). A second limiting spring (593) is fixedly connected to the inner wall of the sliding groove (592). The other end of the second limiting spring (593) is fixedly connected to a limiting block (594). The limiting block (594) penetrates through the connecting block (591) and extends to the outside of the connecting block (591).

3. The automatic blank picking and placing unit for a packaging box according to claim 2, characterized in that: Two left and right fixing blocks (595) are fixedly connected to the top of the inner wall of the protection box (51). A plurality of limiting grooves (596) matched with the limiting block (594) are equally spaced on the opposite sides of the two left and right fixing blocks (595).

4. The automatic blank picking and placing unit for a packaging box according to claim 1, characterized in that: The blank stacking mechanism (2) includes a first support frame (21). The first support frame (21) is slidably connected to the left side of the conveying mechanism (1). A cylinder (22) is fixedly connected to the left side of the first support frame (21). The output end of the cylinder (22) penetrates through the first support frame (21) and extends to the right side of the first support frame (21). A push plate (23) is fixedly connected to the output end of the cylinder (22). A moving motor (24) is fixedly connected to the lower left of the first support frame (21). The output end of the moving motor (24) penetrates through the first support frame (21) and extends to the right side. A gear (25) is fixedly connected to the output end of the moving motor (24). A rack (26) is fixedly connected to the bottom of the conveying mechanism (1). The gear (25) and the rack (26) are meshed and driven.

5. The automatic blank picking and placing unit for a packaging box according to claim 4, characterized in that: A fixing rod (27) is fixedly connected to the front surface of the first support frame (21). The other end of the fixing rod (27) is fixedly connected to a baffle plate (28). A push rod (29) is rotatably connected to the surface of the baffle plate (28). An arc-shaped strip (210) is fixedly connected to the upper end of the push rod (29). A torsion spring (211) is sleeved on the surface of the fixing rod (27) between the opposite sides of the push rod (29) and the baffle plate (28). One end of the torsion spring (211) is fixedly connected to the surface of the fixing rod (27), and the other end of the torsion spring (211) is fixedly connected to the front surface of the push rod (29). A switch (212) is fixedly connected to the front surface of the first support frame (21). The switch (212) is located on the right side of the other end of the push rod (29).

6. The automatic blank picking and placing unit for a packaging box according to claim 1, characterized in that: The sheet feeding mechanism (6) includes a second support frame (61). A plurality of blank code bottom plates (8) are stacked on the second support frame (61). Two moving lead screws (62) are rotatably connected to the left side of the second support frame (61). The other ends of the two moving lead screws (62) both penetrate through the second support frame (61) and extend to the right side of the second support frame (61). Pulley wheels (66) are fixedly connected to the surfaces of the two moving lead screws (62) on the right side of the second support frame (61). The two pulley wheels (66) are connected by a belt. An input motor (65) is arranged on the right side of the front second support frame (61). The output end of the input motor (65) is fixedly connected to one end of the front moving lead screw (62). Connecting sleeves (63) are threadedly connected to the surfaces of the two moving lead screws (62). The two connecting sleeves (63) both penetrate through the second support frame (61) and extend to the inside of the second support frame (61). A push plate (64) is fixedly connected between the opposite sides of the two connecting sleeves (63). A slide rail (7) for receiving the blank code bottom plate (8) with the blanks coded is arranged on the left side of the second support frame (61).

7. The blank stacking method of the automatic blank picking and placing unit for a packaging box according to claim 5, characterized in that: Specifically, it includes the following steps: Step 1: Start the air cylinder. The air cylinder works and pushes the push plate to move, so that the blank is fed above the blank code bottom plate in the blank code rack. When the next blank enters the first support frame, the push plate is pushed again to push it onto the blank code bottom plate. As the number of blanks on the blank code bottom plate increases, the first layer is filled up; Step 2: After one layer of blank coding is completed between two adjacent inverted U-shaped frames, start the moving motor. The moving motor rotates to make the gear rotate. The gear rotates and cooperates with the rack to make the first support frame move. The stopping position is that the first support frame is exactly aligned with the empty slot between the next adjacent clamping plates, so as to continue blank coding; Step 3: After the first layer of blank coding is completed in all the empty slots between the clamping plates on the blank code bottom plate, start the lifting mechanism to make the blank code rack move down by a distance of one layer, and repeat the above operation to perform the second layer of blank coding. In this way, the blank coding operation is completed; Step 4: When the size of the packaging box changes, start the drive motor. The drive motor rotates to move the support plate. The support plate rotates and drives the adjustment plate on the support plate to move, so that the distances between multiple clamping plates change equidistantly.

8. The blank stacking method of the automatic blank picking and placing unit for a packaging box according to claim 7, characterized in that: In step 2, the position where the push rod rotates once and the entire blank stacking mechanism stops is exactly at the empty slot position between adjacent clamping plates, ensuring the accuracy of the blank stacking position.

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