CN112830287A

CN112830287A - Automatic paperboard stacking device

Info

Publication number: CN112830287A
Application number: CN202011627397.9A
Authority: CN
Inventors: 黄国生; 陈丹淮; 苏金辉
Original assignee: Jimei Packaging Printing Technology Xiamen Co ltd
Current assignee: Jimei Packaging Printing Technology Xiamen Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-25
Anticipated expiration: 2040-12-30
Also published as: CN112830287B

Abstract

The invention provides an automatic paperboard stacking device which comprises a rack and a transmission mechanism, wherein the transmission mechanism is used for transmitting a plurality of paperboards; the front end of the rack is provided with a blocking mechanism, and the blocking mechanism is used for blocking the paper boards conveyed on the conveying mechanism; the lifting turnover mechanism is provided with a turnover cage, and the input end of the turnover cage is connected with the output end of the transmission mechanism; the paper shifting mechanism is arranged at the top end of the rack and used for shifting the paper boards in the turnover cage into the stacking mechanism; and the control unit is used for controlling the turnover cage to turn over, so that the paperboards are periodically stacked on the stacking mechanism in a positive and negative mode. The invention can stack the paper boards according to the specified quantity and turn the paper boards forwards and backwards, and realize the leveling function of the stacked paper boards, and is easy to operate.

Description

Automatic paperboard stacking device

Technical Field

The invention relates to the field of paperboard production equipment, in particular to an automatic paperboard stacking device.

Background

The laminating machine is also called a covering machine or a facing machine, is used for laminating and bonding pre-printed color printing facial tissues, card paper and the like, and is an important matched device for producing pre-printed paper color boxes. During the printing process, the cardboard is often turned over to fold the cardboard right side over the cardboard. When stacking the cardboard, if the cardboard is simply stacked in the same direction, there is a warp deformation of the cardboard in one direction during the drying process of the cardboard. But through stacking the cardboard positively and negatively, the cardboard can warp and deform towards the opposite direction, and at the moment, because the mutual stacking and extrusion of the cardboard, the warping influence of the cardboard can be effectively reduced. The paper pasting machine does not have the function of paper turning, so that the paper turning device is required to be matched with the paper pasting machine for common use. When the cardboard that the mount paper machine came out was through the paper turner, can overturn, positive and negative stacking, pile neatly to the cardboard, replaced artifical paper turning and piled up's operation, improved production efficiency, labour saving and time saving. It is therefore particularly important to provide an automated cardboard turning and stacking apparatus.

Disclosure of Invention

The invention provides an automatic paperboard stacking device which can effectively solve the problems.

The invention is realized by the following steps: an automated paperboard stacking apparatus, comprising

A frame;

the conveying mechanism is used for conveying a plurality of paper boards;

the blocking mechanism comprises a blocking plate, a blocking lifting cylinder, a blocking rack and a paper feeding sliding plate; the blocking lifting cylinder is fixed on the blocking rack; the blocking plate is fixed on the blocking lifting cylinder and used for blocking the paper boards conveyed on the conveying mechanism and enabling the paper boards to be stacked on the paper feeding sliding plate;

the lifting turnover mechanism comprises a turnover cage, a turnover shaft, a turnover cylinder, a lifting block, a lifting slide bar, a lifting chain and a lifting motor;

the axle centers of two sides of the turnover cage are provided with turnover shafts; the overturning shaft on each side is hinged to the lifting block; the lifting block on each side is sleeved on a lifting slide rod, and the upper end and the lower end of the lifting slide rod are fixed on the rack; a lifting motor is arranged on the rack, a rotating shaft of the lifting motor is engaged with a lifting chain, and the lifting chain penetrates out of the lifting block and is engaged with a transmission chain wheel fixed at the lower end of the rack;

a turnover cylinder is fixed on the lifting block; the overturning shaft extends out of the lifting block, an overturning gear is fixed at the end of the overturning shaft, and the overturning gear is meshed with a piston rod of the overturning cylinder;

the paper shifting mechanism is arranged at the top end of the rack and used for shifting the paper boards in the turnover cage into the stacking mechanism;

and the control unit is used for controlling the turnover cage to turn over, so that the paperboards are periodically stacked on the stacking mechanism in a positive and negative mode.

As a further improvement, the paper shifting mechanism comprises a paper shifting plate, a paper shifting slide rod, a paper shifting arm and a paper shifting cylinder; a raised clamping cap is arranged in the middle of the upper end surface of the paper pulling plate; the top end of the paper pulling plate is sleeved on the paper pulling sliding rod; the two paper poking slide rods are fixed on the rack; the paper pulling arm is hinged with the rack; the paper poking cylinder is fixed on the rack and connected with the paper poking arm through a piston rod.

As a further improvement, the paper shifting arm sequentially comprises a first shifting arm, a second shifting arm and a third shifting arm; the first shifting arm and the second shifting arm form an included angle of 80-100 degrees; the second shifting arm and the third shifting arm form an included angle of 120-150 degrees; the lengths of the first shifting arm and the second shifting arm are equal; the length of the third shifting arm is greater than that of the first shifting arm and that of the second shifting arm.

As a further improvement, the tail end of the first poking arm is hinged with the frame; the second shifting arm is connected with a piston rod of the paper shifting cylinder; the third shifting arm is provided with a hollow slideway, and the clamping cap is nested in the slideway of the third shifting arm.

As a further improvement, the stacking mechanism comprises a stacking plate, a stacking lifting motor, an active rotating shaft, a passive rotating shaft, a transmission chain, a hanging cable, a rear flap plate and a side flap plate; the stacking lifting motor is fixed at the top end of the rack and is connected with the driving rotating shaft; the driving rotating shaft is in transmission connection with the driven rotating shaft through a transmission chain; hanging cables are fixed at four corners of the stacking plate respectively; the other end of each suspension cable is respectively fixed at two ends of the driving rotating shaft and the driven rotating shaft.

As a further improvement, the rear clapper and the side clapper are fixed at the top end of the frame through a cylinder.

The invention has the beneficial effects that:

one is as follows: the automatic paperboard stacking device can realize automatic turnover of paperboards by arranging the lifting turnover mechanism, and the turnover cylinder drives the turnover shaft to drive the turnover cage to turn over, so that the operation of automatically turning the paperboards forwards and backwards is realized; the lifting motor drives the lifting chain to drive the lifting block to move up and down by arranging the lifting block; when the turnover cage operates and turns over, the lifting block can drive the lifting turnover mechanism to move up and down at the same time, so that the turnover cage can turn over and move up and down at the same time, and the working efficiency of the turnover mechanism is improved;

the second step is as follows: the blocking mechanism is provided with the blocking plate, so that paper on the conveying mechanism can be conveyed according to a certain period interval, 5-10 paper boards can be conveyed each time, a fixed number of paper boards are stacked on the paper feeding sliding plate after the set period interval is met, at the moment, the lifting cylinder is blocked to lift the blocking plate, the paper feeding sliding plate is enabled to feed the paper boards into the turnover cage, then the paper feeding sliding plate returns to the front end of the blocking mechanism, and the next paper turnover cycle is continued; the blocking mechanism can be matched with the lifting turnover mechanism, and the quantity of turnover paper at each time can be regulated and controlled by setting a fixed period interval;

and thirdly: the paper shifting mechanism can shift paper plates in the lifting turnover mechanism to the stacking mechanism, the paper shifting arm is pushed to reciprocate by the paper shifting cylinder, and the reciprocating motion of the paper shifting arm pushes the paper shifting plates to move back and forth on the paper shifting sliding rod; a clamping cap is arranged on the paper shifting plate and is embedded in a sliding chute in the paper shifting arm, so that the paper shifting plate can move along the sliding chute in the paper shifting arm and also move back and forth along the paper shifting sliding rod; the paper shifting arm is divided into a first shifting arm, a second shifting arm and a third shifting arm, the paper shifting arm is arranged to drive the paper shifting plate, and the paper shifting plate is pushed by the paper shifting cylinder instead of directly pushing the paper shifting plate, so that the action distance of the paper shifting plate can be prolonged under the pushing of the paper shifting arm, fewer paper shifting cylinders can be used, and the equipment investment cost is saved;

fourthly, the method comprises the following steps: the stacking mechanism is provided with the rear clapper and the side clappers, and the rear clapper and the front clapper can level paper piles stacked on the stacking mechanism under the pushing of the cylinder, so that the paper boards on the stacking mechanism are still neat and level after being continuously increased; along with the continuous increase of the paper boards on the stacking mechanism, the stacking lifting motor gradually lowers the stacking plates through the operation of the driving rotating shaft and the driven rotating shaft, so that the newly stacked paper boards on the stacking mechanism are always in the working range of the rear clapper and the side clapper, and the efficiency of the rear clapper and the side clapper is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic elevation structure diagram of an automated paperboard stacking apparatus according to an embodiment of the present invention.

Fig. 2 is a top view of an automated paperboard stacking apparatus provided in accordance with an embodiment of the invention.

Fig. 3 is a schematic diagram of a blocking mechanism of an automated paperboard stacking apparatus according to an embodiment of the invention.

Fig. 4 is a schematic diagram of a lifting and turning mechanism of an automated paperboard stacking apparatus according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a paper shifting mechanism of an automatic paper board stacking device according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a stacking mechanism of an automated cardboard stacking apparatus according to an embodiment of the invention.

The figures in the drawings are identified as:

1. a frame;

2. a transport mechanism;

3. a blocking mechanism; 31. a blocking plate; 32. blocking the lifting cylinder; 33. a barrier frame; 34. a paper feed slide plate;

4. lifting and overturning mechanisms; 41. turning over the cage; 42. a turning shaft; 421. turning over the gear; 43; turning over the air cylinder;

44. a lifting block; 45. lifting the sliding rod; 46. lifting the chain; 47. a hoisting motor;

5. a paper-shifting mechanism; 51. pulling a paper board; 511. a clamping cap; 52. a paper pulling slide bar; 53. a paper pulling arm;

531. a first toggle arm; 532. a second toggle arm; 533. a third toggle arm; 54. a paper pulling cylinder;

6. a stacking mechanism; 61. stacking the plates; 62. stacking a lifting motor; 63. a driving rotating shaft; 64. a driven shaft;

65. a drive chain; 66. hoisting cables; 67. a back clapper; 68. a side flap board.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 6, an embodiment of the present invention provides an automatic paperboard stacking apparatus, including: a frame 1; the transport mechanism 2 is used for transporting a plurality of sheets.

The blocking mechanism 3 comprises a blocking plate 31, a blocking lifting cylinder 32, a blocking frame 33 and a paper feeding sliding plate 34; the blocking lifting cylinder 32 is fixed on the blocking frame 33; the blocking plate 31 is fixed on the blocking lifting cylinder 32 and used for blocking the paper boards conveyed on the conveying mechanism 2 and enabling the paper boards to be stacked on the paper feeding sliding plate 34.

When the paper boards are conveyed to the inside of the rack 1, the paper boards slide on the paper feeding sliding plate 34, and at the moment, the paper feeding sliding plate 34 can stack 5-10 paper boards; the blocking plate 31 blocks the advance of the paper feed slide 34 by the blocking lift cylinder 32. After a preset time interval, the blocking lifting cylinder 32 drives the blocking plate 31 to ascend, and the paper feeding sliding plate 34 feeds the stacked paper boards into the turnover cage 41. At this time, the transport mechanism 2 stops operating, and when the paper feeding sliding plate 34 retreats to the front end of the frame 1, the lifting cylinder 32 is blocked to drive the blocking plate 31 to descend, and the paper feeding sliding plate 34 is blocked.

In this embodiment, the blocking frame 33 is connected to the slide bar, so that the blocking frame 33 can adjust the distance along the slide bar, and the distance between the blocking mechanism 1 and the front end of the frame 1 can be adjusted to be larger or smaller, so as to be suitable for paper boards with different sizes.

The lifting turnover mechanism 4 comprises a turnover cage 41, a turnover shaft 42, a turnover cylinder 43, a lifting block 44, a lifting slide 45, a lifting chain 46 and a lifting motor 47; the axle center positions of two sides of the turnover cage 41 are provided with turnover shafts 42; the overturning shafts 42 on each side are hinged to a lifting block 44; each lifting block 44 is sleeved on a lifting slide rod 45, and the upper end and the lower end of the lifting slide rod 45 are fixed on the rack 1; the lifting motor 47 is arranged on the frame 1, a lifting chain 46 is meshed on a rotating shaft of the lifting motor 47, and the lifting chain 46 penetrates out of the lifting block 44 and is meshed with a transmission chain wheel fixed at the lower end of the frame 1.

A transmission chain wheel is arranged on a rotating shaft of the lifting motor 47, a transmission chain wheel is correspondingly arranged at the bottom of the frame 1, the lifting chain 46 is meshed with the upper transmission chain wheel and the lower transmission chain wheel, and the lifting chain 46 can rotate circularly under the operation of the lifting motor 47. The lifting chain 46 penetrates out of the lifting block 44, the lifting chain 46 on one side is fixed inside the lifting block 44, the lifting chain 46 on the other side is freely suspended, and under the work of the lifting motor 47, the lifting block 44 can slide up and down along the lifting slide rod 45, so that the lifting action of the lifting turnover mechanism 4 is realized.

A turnover cylinder 43 is fixed on the lifting block 44; the turning shaft 42 extends out of the lifting block 44, a turning gear 421 is fixed at the end of the turning shaft 42, and the turning gear 421 is meshed with a piston rod of the turning cylinder 43; the front end of the piston rod of the turnover cylinder 43 is provided with meshing teeth which are meshed with a turnover gear 421 on the turnover shaft 42. Under the reciprocating action of the turnover cylinder 43, the turnover gear 421 is driven to rotate, so as to drive the turnover shaft 42 to rotate, and the turnover cage 41 is rotated.

The paper shifting mechanism 5 is arranged at the top end of the rack 1 and used for shifting the paper boards in the turnover cage 41 into the stacking mechanism 6.

And the control unit is used for controlling the overturning cage 41 to overturn, so that the paperboards are periodically stacked on the stacking mechanism 6 in a front-back mode. The overturning cage 41 is composed of two thin-wall channel steel with opposite openings, the same side surfaces of the two thin-wall channel steel are formed by connecting stiffening plates, the stiffening plates are used for fixing the overturning cage 41, and the other side surface of the overturning cage 41 is open. The cardboard sheets can be plucked from the side of the opening of the reversing cage 41 by the plucking mechanism 5. The flipping cage 41 can be periodically flipped by a control command of the control unit.

One periodic process is as follows: when the opening surface of the turning cage 41 faces upwards, the paper feeding sliding plate 34 conveys 5-10 stacked paper boards into the turning cage 41, and at the moment, the turning cage 41 is lifted; the turnover cage 41 does not turn over in the lifting process, and the paper shifting mechanism 5 shifts the paper boards into the stacking board 61; in the descending process of the turnover cage 41, the control unit controls the turnover cage 41 to turn over by 180 degrees, so that the opening surface of the turnover cage 41 faces downwards and descends to the bottom of the rack 1 again; when the paper feeding sliding plate 34 feeds the paper boards into the turnover cage 41, the turnover cage 41 is continuously lifted, at the moment, the turnover cage 41 is turned over for 180 degrees again, so that the opening surface of the turnover cage 41 faces upwards, and the paper shifting mechanism 5 shifts the paper boards into the stacking plate 61; the tumble cage 41 then descends again without tumbling, waiting for the next cycle. In a turnover period, the turnover cage 41 realizes the operation of turning over the paper boards once and not turning over once, and in a period, the paper feeding process is carried out twice, so that the front and back stacking of the paper boards is realized.

As a further improvement, the paper poking mechanism 5 comprises a paper poking plate 51, a paper poking slide rod 52, a paper poking arm 53 and a paper poking cylinder 54; a raised clamping cap 511 is arranged in the middle of the upper end face of the paper poking plate 51; the top end of the paper poking plate 51 is sleeved on the paper poking slide rod 52; the two paper shifting slide bars 52 are fixed on the frame 1, and the paper shifting plate 51 can move back and forth along the paper shifting slide bar 53; the paper shifting arm 53 is hinged with the rack 1, and the paper shifting arm 53 can rotate relative to the rack 1; the paper shifting cylinder 54 is fixed on the frame 1 and connected with the paper shifting arm 53 through a piston rod, and the paper shifting arm 53 is pushed to rotate relative to the frame 1 through the work of the paper shifting cylinder 54.

As a further improvement, the paper pulling arm 53 sequentially comprises a first pulling arm 531, a second pulling arm 532 and a third pulling arm 533; the first shifting arm 531 and the second shifting arm 532 form an included angle of 80-100 degrees, preferably 90 degrees; the second toggle arm 532 and the third toggle arm 533 form an included angle of 120-150 degrees, preferably an included angle of 135 degrees; the first toggle arm 531 and the second toggle arm 532 are equal in length; the length of the third toggle arm 533 is greater than the first toggle arm 531 and the second toggle arm 532. The tail end of the first poking arm 531 is hinged with the rack 1; the second shifting arm 532 is connected with the piston rod of the paper shifting cylinder 54, the rotation radius of the second shifting arm 532 is smaller than that of the third shifting arm 533, and the second shifting arm 532 is used for connecting the paper shifting cylinder 54 and is beneficial to selecting a small cylinder; and first group arm 531 is not convenient for be connected with the cylinder when rotating, so dial arm 532 and first group arm 531 with the second and set 90 to, make the cylinder be connected with second group arm 532, can provide bigger lapse space for the cylinder, can drive first group arm 531 again and have wider turning radius to it makes front and back lapse to drive group cardboard 51, prolongs the effect scope of dialling cardboard 51.

The third toggle arm 533 is provided with a hollow slide way, and the clamp cap 511 is nested in the slide way of the third toggle arm 533. The paper shifting arm 53 is arranged to drive the paper shifting plate 51 to move back and forth along the paper shifting slide rod 52 instead of using the paper shifting cylinder 54 to directly act on the paper shifting plate 51, so that the paper shifting plate 51 can be pushed in a wider range by utilizing the force arm effect of the paper shifting arm 53. The shifting cylinder 54 needs a longer cylinder to push the paper shifting board 531, so that the pushing distance of the paper shifting board 51 can be ensured. Therefore, a larger air cylinder is avoided, the paper poking arm 53 is used as a middle component, a hollow slide way is arranged on the third poking arm 533, and the clamping cap 511 is nested in the slide way and pushes the paper poking plate 51 to move back and forth.

As a further improvement, the stacking mechanism 6 comprises a stacking plate 6, a stacking lifting motor 62, a driving rotating shaft 63, a driven rotating shaft 64, a transmission chain 65, a hanging cable 66, a rear flap 67 and a side flap plate 68; the stacking lifting motor 62 is fixed at the top end of the frame 1 and connected with a driving rotating shaft 63; the driving rotor 63 is in transmission connection with a driven rotating shaft 64 through a transmission chain 65; hanging cables 66 are respectively fixed at four corners of the stacking plate 61; the other end of each of the suspension cables 66 is fixed to both ends of the driving shaft 63 and the driven shaft 64, and the driving shaft 63 drives the driven shaft 64 to simultaneously raise or lower each of the suspension cables 66.

As a further improvement, the back flap 67 and the side flap 68 are fixed to the top end of the frame 1 by means of air cylinders. The rear flap 67 and the side flaps 68 on both sides are used to trim the sheets stacked in the stack 61. The back clapper 67 and the side clapper 68 are both connected to cylinders, each cylinder is fixed at the top end of the frame 1, and the back clapper 67 and the side clapper 68 are pushed forward by the cylinders to be attached to the edges of the paper boards, so that the stacked paper boards are flat. After the paper boards are flattened, the stacking mechanism 6 moves downwards to wait for the next paper pushing mechanism 5 to push the paper boards.

The working principle of the invention is as follows:

when the transport mechanism 2 transports the paper boards in turn, the paper boards enter the frame 1 from the transport rollers and fall on the paper feeding sliding plate 34 at the front end of the bottom of the frame 1. The paper feeding sliding plate 34 is blocked by the blocking plate 31, after waiting for a preset period interval, a preset number of paper boards, generally 5-10 paper boards, are stacked on the paper feeding sliding plate 34, then the lifting cylinder 32 is blocked to drive the blocking plate 31 to move upwards, and the paper feeding sliding plate 34 sends the stacked paper boards into the turnover cage 41 waiting at the rear end. At this time, the transport roller of the transport mechanism 2 stops transporting the sheet, the sheet-feeding slide 34 transports the sheet into the reversing cage 41, and then returns to the front end of the bottom of the frame 1, the stopper plate 31 falls down to stop the sheet-feeding slide 34, and the transport roller continues transporting the sheet. The lifting motor 47 drives the lifting chain 46 to drive the lifting block 44 to ascend, and the turnover cage 41 ascends along with the lifting block. The control unit can control the turnover cage 4 to turn over or not to turn over, when the control instruction controls the turnover cage 41 to turn over, the turnover air cylinder 43 starts to operate, the turnover gear 421 is driven to rotate, and the turnover cage 41 is driven to turn over. When the turnover cage 41 reaches the upper end of the frame, the paper-pushing mechanism 5 starts to operate. The paper pulling cylinder 54 pushes the paper pulling arm 53 to reciprocate, the paper pulling arm 53 pushes the paper pulling plate 51 to slide back and forth on the paper pulling slide rod 52, the paper plates in the turnover cage 41 are pushed to enter the stacking plate 61, and then the paper pulling plate 51 returns to the original position. When the sheets are fed onto the stacking plate 61, the rear flap 67 and the side flaps 68 operate in succession to trim the stacked sheets flush. After the next round of paper boards enters the stacking plate 61, the stacking and lifting motor 62 operates to move the hanging cable 66 downward for a certain distance, and the operation is repeated in a circulating manner until the paper boards on the stacking plate 61 are fully loaded, and then the paper boards can be taken out.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic change cardboard stacking apparatus which characterized in that: comprises that

A frame (1);

the conveying mechanism (2) is used for conveying a plurality of paper boards;

the blocking mechanism (3) comprises a blocking plate (31), a blocking lifting cylinder (32), a blocking rack (33) and a paper feeding sliding plate (34); the blocking lifting cylinder (32) is fixed on the blocking frame (33); the blocking plate (31) is fixed on the blocking lifting cylinder (32) and used for blocking the paper boards conveyed on the conveying mechanism (2) and enabling the paper boards to be stacked on the paper feeding sliding plate (34);

the lifting turnover mechanism (4) comprises a turnover cage (41), a turnover shaft (42), a turnover cylinder (43), a lifting block (44), a lifting slide rod (45), a lifting chain (46) and a lifting motor (47);

the axle centers of two sides of the turnover cage (41) are provided with turnover shafts (42); the overturning shaft (42) at each side is hinged to a lifting block (44); the lifting block (44) on each side is sleeved on a lifting slide rod (45), and the upper end and the lower end of the lifting slide rod (45) are fixed on the rack (1); a lifting motor (47) is arranged on the rack (1), a lifting chain (46) is meshed on a rotating shaft of the lifting motor (47), and the lifting chain (46) penetrates out of the lifting block (44) and is meshed with a transmission chain wheel fixed at the lower end of the rack (1);

a turnover cylinder (43) is fixed on the lifting block (44); the overturning shaft (42) extends out of the lifting block (44), an overturning gear (421) is fixed at the end of the overturning shaft (42), and the overturning gear (421) is meshed with a piston rod of the overturning cylinder (43);

the paper shifting mechanism (5) is arranged at the top end of the rack (1) and is used for shifting the paper boards in the turnover cage (41) into the stacking mechanism (6);

the control unit is used for controlling the overturning cage (41) to overturn so as to enable the paperboards to be periodically stacked on the stacking mechanism (6) in a front-back mode.

2. An automated cardboard stacking apparatus according to claim 1, characterized in that the paper poking mechanism (5) comprises a paper poking board (51), a paper poking slide bar (52), a paper poking arm (53) and a paper poking cylinder (54); a raised clamping cap (511) is arranged in the middle of the upper end face of the paper poking plate (51); the top end of the paper pulling plate (51) is sleeved on the paper pulling sliding rod (52); the two paper poking slide bars (52) are fixed on the rack (1); the paper pulling arm (53) is hinged with the frame (1); the paper poking cylinder (54) is fixed on the frame (1) and is connected with the paper poking arm (53) through a piston rod.

3. An automated cardboard stacking apparatus according to claim 2, wherein the pick arm (53) comprises in sequence a first pick arm (531), a second pick arm (532) and a third pick arm (533); the first shifting arm (531) and the second shifting arm (532) form an included angle of 80-100 degrees; the second toggle arm (532) and the third toggle arm (533) form an included angle of 120-150 degrees; the first toggle arm (531) and the second toggle arm (532) are equal in length; the length of the third toggle arm (533) is greater than the first toggle arm (531) and the second toggle arm (532).

4. An automated cardboard stacking apparatus according to claim 3, characterized in that the end of the first toggle arm (531) is hingedly connected to the frame (1); the second shifting arm (532) is connected with a piston rod of the paper shifting cylinder (54); the third shifting arm (533) is provided with a hollow slideway, and the clamping cap (511) is nested in the slideway of the third shifting arm (533).

5. An automated cardboard stacking apparatus according to claim 1, wherein the stacking mechanism (6) comprises a stacking plate (61), a stacking lifting motor (62), an active shaft (63), a passive shaft (64), a transmission chain (65), a hanging cable (66), a back flap plate (67) and a side flap plate (68); the stacking lifting motor (62) is fixed at the top end of the rack (1) and is connected with a driving rotating shaft (63); the driving rotating shaft (63) is in transmission connection with a driven rotating shaft (64) through a transmission chain (65); four corners of the stacking plate (61) are respectively fixed with a suspension cable (66); the other end of each suspension cable (66) is respectively fixed at two ends of the driving rotating shaft (63) and the driven rotating shaft (64).

6. An automated cardboard stacking apparatus according to claim 5, characterized in that the back flap (67) and the side flaps (68) are fixed to the top end of the frame (1) by means of air cylinders.