CN109250208B - Box blank lifting mechanism and box opening device - Google Patents

Abstract

The invention discloses a box blank lifting mechanism, which comprises a box bin, a pushing mechanism, a lifting part, a stop lever and a box lifting plate, wherein the box bin is arranged on the box bin; the lifting component is arranged on the box bin, the lifting box plate is arranged at the movable end of the lifting component, the stop lever is arranged on the lifting box plate along the vertical direction and abuts against the front side of the box blanks transversely stacked on the box bin, the lifting box plate is arranged at the bottom of a box blank at the forefront end of the box blank, the lifting component drives the lifting box plate to lift, and the lifting box plate lifts the box blank at the forefront end; the pushing mechanism is arranged at the rear side of the longitudinal direction of the box bin, and can move transversely relative to the box bin, and the pushing mechanism abuts against the rear side of the box blank. The invention also discloses a box unpacking device comprising the box blank lifting mechanism. The invention can smoothly lift the box blank from the box bin, does not damage the box blank, simultaneously stably opens the box blank, and improves the success rate of opening the box blank.

Description

A box blank lifting mechanism and box opening device

Technical field

The invention relates to the technical field of packaging machinery, and in particular to a box blank lifting mechanism and a box opening device.

Background technique

In the prior art, as shown in Figures 1 and 2, in the field of automated packaging technology, the folding box blanks 10 to be opened are stacked on the bin 20, and are stacked in the horizontal direction. Both ends of one side of the bin 20 Resistance mechanisms 30 are respectively provided to limit the tilting of the stacked box blanks 10 from one side and maintain the vertical state. The abutment mechanism 30 includes a buckle box plate wheel 301, a connecting rod 302 and a spring 303. The connecting rod 302 can be rotated through a rotating shaft. The swing is installed on the box warehouse 20, the connecting rod 302 is arranged longitudinally, the box buckle plate wheel 301 is installed on one end of the connecting rod 302 close to the middle of the box blank 10, one end of the spring 303 is connected to the box warehouse 20, and the other end of the spring 303 is connected to the connecting rod 302 At the other end, the spring 303 is arranged laterally. A pushing mechanism 40 is provided on the other side of the box bin 20. The pushing mechanism 40 can move horizontally to restrict the stacked box blanks 10 from tipping from the other side and maintain the vertical state. The pushing mechanism 40 includes a box pressing plate 401, which presses the box blanks 10. The box board 401 pushes the other side of the top stacked box blank 10 .

The vacuum suction cup 50 is installed on the bracket 60. The bracket 60 can move horizontally. The vacuum suction cup 50 sucks the front long side of the folding box blank 10, pulls out the folding box blank 10 and opens it. Its disadvantages are:

First, due to the high working frequency, reaching (10-15) times/min × (60) min × (24) h = (14400-21600) times/day, spring 303 needs to be replaced frequently.

Second, the box blank 10 in the box warehouse 20 is clamped by the rear push mechanism 40 and the front spring 303. When the air pressure changes suddenly or the spring 303 becomes weak, the box blank 10 is easily squeezed out of the box warehouse 20, or when the box is opened. When the blank 10 was removed, two box blanks 10 were brought out, causing a malfunction.

Third, since the suction head of the vacuum suction cup 50 is made of silica gel, it is necessary to overcome the pressure of the springs 303 on both sides to pull out the box blank 10. The suction head is easily damaged, and it is easy to fail to pull out the box blank 10.

Fourth, under the pressure of the springs 303 on both sides, during the process of lifting the box blank 10, the box buckling plate wheel 301 is easy to scratch the box blank 10.

5. When the elastic force of the springs 303 on both sides is inconsistent, it will cause the vacuum suction cup 50 to lift the box blank 10. One side of the box blank 10 first breaks away from the buckle box wheel 301, and the other side is under the pressure of the box buckle wheel 301. The plate wheel 301 and the vacuum suction cup 50 work together to fold the front and rear sides of the box blank 10 in the same direction, which is different from the desired result (the front and rear sides of the box blank 10 are folded in different directions), causing the box blank 10 to fail to open.

Contents of the invention

The present invention aims to solve one of the technical problems in the above-mentioned technologies, at least to a certain extent. Therefore, one object of the present invention is to provide a box blank lifting mechanism to smoothly lift the box blank from the box silo without damaging the box blank.

The second object of the present invention is to provide a box opening device that can smoothly lift the box blank from the box silo without damaging the box blank, while stably opening the box blank and improving the success rate of opening the box blank.

In order to achieve the above object, the first embodiment of the present invention proposes a box blank lifting mechanism, which includes a box bin, a pushing mechanism, a lifting component, a blocking rod and a box lifting plate;

The lifting component is arranged on the bin, the lifting plate is placed on the movable end of the lifting component, the blocking rod is arranged on the lifting plate in the vertical direction, and the blocking rod abuts against the front side of the box blanks that are stacked on the bin in the transverse direction. , the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank, the lifting component drives the box lifting plate to rise, and the box lifting plate lifts the box blank at the frontmost end;

The pushing mechanism is arranged on the longitudinal rear side of the box bin, the pushing mechanism can move laterally relative to the box bin, and the pushing mechanism abuts the rear side of the box blank.

According to a box blank lifting mechanism according to an embodiment of the present invention, the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank. The lifting component drives the box lifting plate to rise, and the box lifting plate lifts the box blank at the frontmost end to facilitate the rear. The vacuum suction cups on the rear side of the process suck the front and rear sides of the box blank. After the box blank is opened, the lifting component drives the box lifting plate to reset and open. Then, the pushing mechanism pushes the box blank forward, so that the frontmost box blank is placed on the lifting box. Above the box board, that is, the lifting box board is placed at the bottom of the box blank at the frontmost end of the box blank. The box blank can be lifted smoothly from the box warehouse without damaging the box blank.

In addition, the box blank lifting mechanism proposed according to the above embodiments of the present invention may also have the following additional technical features:

Further, the lifting component is a lifting cylinder, and the box lifting plate is arranged at the movable end of the lifting cylinder.

Further, two lifting cylinders are provided, and the two lifting cylinders are respectively provided on both sides of the front end of the bin. The two ends of the lifting plate are respectively connected to the movable ends of the lifting cylinders.

Further, a mounting frame is formed on both sides of the front end of the bin extending in a vertical direction. A slide rail is formed on the mounting frame. The lifting cylinder is arranged on the mounting frame. The movable end of the lifting cylinder is connected to a sliding seat, and the sliding seat slides on the sliding rail. , both ends of the lifting box plate are connected to the sliding seats respectively.

Further, the pushing mechanism includes a transversely moving cylinder and a box-pressing plate. The transversely moving cylinder is arranged on the box bin. The box-pressing plate is arranged at the moving end of the transversely moving cylinder. The box-pressing plate is arranged longitudinally.

In order to achieve the above object, the second embodiment of the present invention proposes a box opening device, which includes a box blank lifting mechanism, a front side adsorption part, a rear side adsorption part and a bracket;

Among them, the box blank lifting mechanism includes a box bin, a pushing mechanism, lifting parts, blocking rods and a box lifting plate;

The lifting component is arranged on the bin, the lifting plate is placed on the movable end of the lifting component, the blocking rod is arranged on the lifting plate in the vertical direction, and the blocking rod abuts against the front side of the box blanks that are stacked on the bin in the transverse direction. , the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank, the lifting component drives the box lifting plate to rise, and the box lifting plate lifts the box blank at the frontmost end;

The pushing mechanism is arranged on the longitudinal rear side of the box bin, the pushing mechanism can move laterally relative to the box bin, and the pushing mechanism abuts the rear side of the box blank;

The front side adsorption part is installed on the bracket, the front side adsorption part can move horizontally relative to the bracket, and the front side adsorption part can adsorb the front side edge of the frontmost box blank;

The rear adsorption part is installed on the bracket, and the rear adsorption part can adsorb the rear side of the frontmost box blank.

According to a box opening device according to an embodiment of the present invention, the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank, and the lifting component drives the box lifting plate to rise. The box lifting plate lifts the box blank at the frontmost end, and the front side is sucked The piece moves backward to absorb the front side of the front box blank, and the rear side adsorption piece absorbs the rear side of the front box blank. Then, the lifting component drives the box lifting plate to reset. Then, the front side adsorption piece moves horizontally to open the box blank. After the blank is opened, the lifting component drives the box lifting plate to reset, and then the pushing mechanism pushes the box blank forward so that the frontmost box blank is placed on the box lifting plate, that is, the box lifting plate is placed on the frontmost end of the box blank. The bottom of the box blank. The box blank can be smoothly lifted from the box silo without damaging the box blank; the front and rear suction opening of the box blank can stably open the box blank without damaging the box blank, and at the same time, it can improve the success rate of opening the box blank.

In addition, the box opening device proposed according to the above embodiments of the present invention may also have the following additional technical features:

Furthermore, the front side adsorption member is a vacuum suction cup.

Furthermore, the rear adsorption part is a vacuum suction cup.

Further, a horizontal displacement mechanism is provided on the bracket, and the front side adsorption member is provided on the moving end of the horizontal displacement mechanism.

Further, the horizontal displacement mechanism includes a driving motor, a driving wheel and a driven wheel; the driving motor drives the driving wheel to rotate, the driving wheel and the driven wheel are connected through a belt or chain, and the front side adsorption member is fixed on the belt or chain.

Furthermore, a box pressing mechanism is also included. A box pressing mechanism is provided on at least one of the transverse sides of the box bin. The box pressing mechanism includes a transverse displacement component, a longitudinal displacement component and a pressure plate. The transverse displacement component is arranged on the box bin, and the longitudinal displacement component It is arranged at the moving end of the transverse displacement component, the pressing plate is arranged at the moving end of the longitudinal displacement component, and the pressing plate is arranged longitudinally.

Furthermore, box pressing mechanisms are respectively provided on both sides of the box bin in the lateral direction, and the two box pressing mechanisms are arranged axially symmetrically.

Further, the transverse displacement component is a pressure box cylinder; the longitudinal displacement component is a pressure plate cylinder.

Further, the pressure plate includes a pressing portion and a connecting portion that are connected to each other. The connecting portion is arranged transversely and the pressing portion is arranged longitudinally. The connecting portion is connected to the moving end of the longitudinal displacement component.

Furthermore, the lateral displacement component is a pressure box cylinder, and the longitudinal displacement component is a pressure plate cylinder. The pushing mechanism includes a lateral movement cylinder, and the pressure box cylinder, pressure plate cylinder and lateral movement cylinder are connected to the same air pressure source.

Description of the drawings

Figure 1 is a schematic structural diagram of the prior art;

Figure 2 is a partial enlarged view of Figure 1;

Figure 3 is a schematic structural diagram of a box blank lifting mechanism according to an embodiment of the present invention;

Figure 4 is a side view of the box blank lifting mechanism according to the embodiment of the present invention;

Figure 5 is a partial enlarged view of Figure 4;

Figure 6 is a schematic three-dimensional assembly diagram of an unpacking device according to an embodiment of the present invention;

Figure 7 is another three-dimensional assembly schematic diagram of the unboxing device according to an embodiment of the present invention;

Figure 8 is a top view of the unboxing device according to the embodiment of the present invention.

Label description

Box blank 10 Box warehouse 20

Resisting mechanism 30 fastening box plate wheel 301

Connecting rod 302 spring 303

Push mechanism 40 Press box plate 401

Vacuum suction cup 50 bracket 60

Box blank lifting mechanism 1 Box warehouse 11

Pushing mechanism 12 Lateral moving cylinder 121

Pressure box plate 122 Lifting component 13

Stop bar 14 liter box plate 15

Box blank 16 mounting bracket 17

Front adsorption part 2 Rear adsorption part 3

Bracket 4 horizontal displacement mechanism 41

Drive motor 411 driving wheel 412

Driven pulley 413 Belt or chain 414

Pressure box mechanism 5 lateral displacement component 51

Longitudinal displacement member 52 pressure plate 53.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention.

As shown in FIGS. 3 to 5 , a box blank lifting mechanism 1 according to the embodiment of the present invention includes a box bin 11 , a pushing mechanism 12 , a lifting component 13 , a blocking rod 14 and a box lifting plate 15 .

The lifting component 13 is arranged on the box bin 11, the box lifting plate 15 is placed on the movable end of the lifting component 13, the blocking rod 14 is arranged on the box lifting plate 15 in the vertical direction, the blocking rod 14 is against the horizontally stacked box On the front side of the box blank 16 of the warehouse 11, the box lifting plate 15 is placed at the bottom of the box blank 16 at the frontmost end of the box blank 16. The lifting component 13 drives the box lifting plate 15 to rise, and the box lifting plate 15 lifts the box blank 16 at the frontmost end. 16.

The pushing mechanism 12 is disposed on the longitudinal rear side of the box bin 11 . The pushing mechanism 12 can move laterally relative to the box bin 11 . The pushing mechanism 12 abuts against the rear side of the box blank 16 .

The box lifting plate 15 is placed at the bottom of the box blank 16 at the frontmost end of the box blank 16. The lifting component 13 drives the box lifting plate 15 to rise. The box lifting plate 15 lifts the box blank 16 at the frontmost end to facilitate the subsequent process of vacuum suction cup to lift the box. The blank 16 is opened. After the blank 16 is opened, the pushing mechanism 12 pushes the blank 16 forward, so that the frontmost box blank 16 is placed on the box lifting plate 15, that is, the box lifting plate 15 is placed on the frontmost side of the box blank 16. 16 bottoms of a box of blanks at the end. The box blank 16 can be smoothly lifted from the box bin 11 without damaging the box blank 16 .

In some examples, the lifting component 13 is a lifting cylinder, and the lifting plate 15 is provided at the movable end of the lifting cylinder. There are two lifting cylinders, and the two lifting cylinders are respectively arranged on both sides of the front end of the box bin 11. The two ends of the lifting plate 15 are respectively connected to the movable ends of the lifting cylinders. The lifting component 13 may also be a servo motor.

A mounting frame 17 is formed on both sides of the front end of the bin 11 extending in a vertical direction. A sliding rail is formed on the mounting frame 17. A lifting cylinder is arranged on the mounting frame 17. The movable end of the lifting cylinder is connected to a sliding seat. The sliding seat is on the sliding rail. Slide upward, and the two ends of the lifting box plate 15 are respectively connected to the sliding seats.

In some examples, the pushing mechanism 12 includes a transverse moving cylinder 121 and a box pressing plate 122. The transverse moving cylinder 121 is provided on the box bin 11. The pressing box plate 122 is provided at the moving end of the transverse moving cylinder 121. The box pressing plate 122 longitudinally set up.

As shown in Figures 3 to 8, a box opening device according to the embodiment of the present invention includes a box lifting mechanism 1, a front adsorption part 2, a rear adsorption part 3 and a bracket 4. Among them, the box blank lifting mechanism 1 includes a box bin 11, a pushing mechanism 12, a lifting component 13, a blocking rod 14 and a box lifting plate 15.

The lifting component 13 is arranged on the box bin 11, the box lifting plate 15 is placed on the movable end of the lifting component 13, the blocking rod 14 is arranged on the box lifting plate 15 in the vertical direction, the blocking rod 14 is against the horizontally stacked box On the front side of the box blank 16 of the warehouse 11, the box lifting plate 15 is placed at the bottom of the box blank 16 at the frontmost end of the box blank 16. The lifting component 13 drives the box lifting plate 15 to rise, and the box lifting plate 15 lifts the box blank 16 at the frontmost end. 16. The pushing mechanism 12 is disposed on the longitudinal rear side of the box bin 11 . The pushing mechanism 12 can move laterally relative to the box bin 11 . The pushing mechanism 12 abuts against the rear side of the box blank 16 .

The front side adsorption part 2 is installed on the bracket 4. The front side adsorption part 2 can move horizontally relative to the bracket 4. The front side adsorption part 2 can adsorb the front side edge of the frontmost box blank 16. The rear side adsorption part 3 is installed on the bracket 4, and the rear side adsorption part 3 can adsorb the rear side of the frontmost box blank 16.

The box lifting plate 15 is placed at the bottom of a box blank 16 at the frontmost end of the box blank 16. The lifting component 13 drives the box lifting plate 15 to rise. The box lifting plate 15 lifts the box blank 16 at the frontmost end, and the front side adsorption member 2 moves to the right. The front side of the front box blank 16 is adsorbed, and the rear side adsorption part 3 moves left to absorb the rear side of the front end box blank 16. Then, the lifting component 13 drives the box lifting plate 15 to reset, and then the front side adsorption part 2 moves horizontally to lift the box. The blank 16 is opened. After the box blank 16 is opened, the lifting component 13 drives the box lifting plate 15 to reset, and then the pushing mechanism 12 pushes the box blank 16 forward, so that the frontmost box blank 16 is placed on the box lifting plate 15, that is, The box lifting plate 15 is placed at the bottom of a box blank 16 at the frontmost end of the box blank 16. The box blank 16 can be smoothly lifted from the box bin 11 without damaging the box blank 16 . By sucking and opening the box blank 16 front and back, the box blank 16 can be opened stably without damaging the box blank 16. At the same time, the success rate of opening the box blank 16 can be improved.

In some examples, the front adsorption part 2 is a vacuum suction cup, the rear adsorption part 3 is a vacuum suction cup, and the suction head of the vacuum suction cup is made of silicone. The front side adsorption part 2 and the rear side adsorption part 3 can also be other adsorption structures.

In some examples, the bracket 4 is provided with a horizontal displacement mechanism 41 , and the front side adsorption member 2 is provided on the moving end of the horizontal displacement mechanism 41 .

The horizontal displacement mechanism 41 includes a driving motor 411, a driving wheel 412 and a driven wheel 413. The driving motor 411 drives the driving wheel 412 to rotate. The driving wheel 412 and the driven wheel 413 are connected through a belt or chain 414, and the front adsorption member 2 is fixed on the belt. Or on the chain 414. The horizontal displacement mechanism 41 can also be other structures, such as a cylinder.

In some examples, a box pressing mechanism 5 is also included. The box pressing mechanism 5 is provided on at least one side of the transverse sides of the box bin 11 . The box pressing mechanism 5 includes a lateral displacement component 51 , a longitudinal displacement component 52 and a pressure plate 53 . The component 51 is arranged on the bin 11, the longitudinal displacement component 52 is arranged at the moving end of the transverse displacement component 51, the pressing plate 53 is arranged at the moving end of the longitudinal displacement component 52, and the pressing plate 53 is arranged longitudinally.

The blocking rod 14 restricts the dumping of the box blank 16 from one side, and the pushing mechanism 12 restricts the dumping of the box blank 16 from the other side. When the box blank 16 in the box bin 11 is almost used up, the longitudinal displacement component 52 drives the pressing plate 53 moves closer to the box blank 16, and the transverse displacement component 51 and the longitudinal displacement component 52 move closer to the remaining box blank 16, so that the pressing plate 53 abuts the remaining box blank 16 and prevents the box blank 16 from tipping; at this time, push The mechanism 12 moves away from the remaining box blanks 16, leaving a neutral space, and adds the box blanks 16 into the neutral space. After the addition of the box blanks 16 is completed, the pushing mechanism 12 moves closer to the box blanks 16 and against the box blanks 16, and then longitudinally displaces the components 52 drives the pressure plate 53 to reset, and the transverse displacement component 51 drives the longitudinal displacement component 52 to reset. It can improve the efficiency of adding boxes, facilitate the operation of adding boxes, improve safety and reduce labor costs.

In some examples, box pressing mechanisms 5 are respectively provided on both sides of the box bin 11 in the lateral direction. The two box pressing mechanisms 5 are arranged axially symmetrically so that the box blank 16 can be pressed against it from both sides, thereby preventing the box blank 16 from tipping.

In some examples, the lateral displacement component 51 is a pressure box cylinder, and the lateral displacement component 51 drives the longitudinal displacement component 52 to move. The lateral displacement component 51 can also be other displacement mechanisms, such as motor-driven structures. The longitudinal displacement component 52 is a pressing plate cylinder, and the longitudinal displacement component 52 drives the pressing plate 53 to move. The longitudinal displacement component 52 can also be other displacement mechanisms, such as a motor drive structure. The pressure box cylinder, pressure plate cylinder and transverse movement cylinder are connected to the same air pressure source, so that the pressure they exert on the box blank 16 is consistent, thereby not affecting subsequent processes.

In some examples, the pressure plate 53 includes a resisting portion and a connecting portion connected to each other. The connecting portion is arranged transversely and the resisting portion is arranged longitudinally. The connecting portion is connected to the moving end of the longitudinal displacement component. The pressing plate can also be of other structures, as long as it can be pressed against the box base 16 .

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The directions or positions indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" etc. The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly provided and limited, the term "above" or "below" a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may join and combine the different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (7)

1. A box blank lifting mechanism, characterized by: including a box bin, a pushing mechanism, a lifting component, a blocking rod and a box lifting plate; The lifting component is arranged on the bin, the lifting plate is placed on the movable end of the lifting component, the blocking rod is arranged on the lifting plate in the vertical direction, and the blocking rod abuts against the front side of the box blanks that are stacked on the bin in the transverse direction. , the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank, the lifting component drives the box lifting plate to rise, and the box lifting plate lifts the box blank at the frontmost end; the lifting component is a lifting cylinder, and the box lifting plate is set on the lifting cylinder active end; The pushing mechanism is arranged on the longitudinal rear side of the box silo. The pushing mechanism can move laterally relative to the box silo. The pushing mechanism is against the rear side of the box blank. The pushing mechanism includes a transverse moving cylinder and a box pressing plate. The transverse moving cylinder is arranged On the box warehouse, the box pressing plate is set at the moving end of the transverse moving cylinder, and the box pressing plate is set longitudinally; The box lifting plate is placed at the bottom of the box blank at the frontmost end of the box blank. The lifting component drives the box lifting plate to rise. The box lifting plate lifts the box blank at the frontmost side, which facilitates the rear vacuum suction cups in the subsequent process to lift the box blank on the front and rear sides. After the box blank is sucked and opened, the lifting component drives the box lifting plate to reset and open, and then the pushing mechanism pushes the box blank forward so that the frontmost box blank is placed on the box lifting plate, that is, the box lifting plate is placed on the box blank The frontmost end of a box blank. 2. A box blank lifting mechanism according to claim 1, characterized in that: there are two lifting cylinders, the two lifting cylinders are respectively arranged on both sides of the front end of the box bin, and the two ends of the box lifting plate are connected respectively. The movable end of the lift cylinder. 3. A box opening device, characterized by: including a box blank lifting mechanism, a front side adsorption piece, a rear side adsorption piece and a bracket; Among them, the box blank lifting mechanism includes a box bin, a pushing mechanism, lifting parts, blocking rods and a box lifting plate; The lifting component is arranged on the bin, the lifting plate is placed on the movable end of the lifting component, the blocking rod is arranged on the lifting plate in the vertical direction, and the blocking rod abuts against the front side of the box blanks that are stacked on the bin in the transverse direction. , the box lifting plate is placed at the bottom of a box blank at the frontmost end of the box blank, the lifting component drives the box lifting plate to rise, and the box lifting plate lifts the box blank at the frontmost end; The pushing mechanism is arranged on the longitudinal rear side of the box bin, the pushing mechanism can move laterally relative to the box bin, and the pushing mechanism abuts the rear side of the box blank; The front side adsorption part is installed on the bracket, the front side adsorption part can move horizontally relative to the bracket, and the front side adsorption part can adsorb the front side edge of the frontmost box blank; The rear side adsorption piece is installed on the bracket, and the rear side adsorption piece can adsorb the rear side edge of the frontmost box blank; It also includes a box pressing mechanism. At least one of the transverse sides of the box bin is provided with a box pressing mechanism. The box pressing mechanism includes a transverse displacement component, a longitudinal displacement component and a pressure plate. The transverse displacement component is arranged on the box bin, and the longitudinal displacement component is arranged on the box bin. The moving end of the transverse displacement component and the pressing plate are arranged at the moving end of the longitudinal displacement component, and the pressing plate is arranged longitudinally. 4. An unpacking device according to claim 3, characterized in that: the front side adsorption member is a vacuum suction cup; the rear side adsorption member is a vacuum suction cup. 5. An unpacking device according to claim 3, characterized in that: a horizontal displacement mechanism is provided on the bracket, and the front side adsorption member is provided on the moving end of the horizontal displacement mechanism. 6. An unpacking device according to claim 5, characterized in that: the horizontal displacement mechanism includes a driving motor, a driving wheel and a driven wheel, the driving motor drives the driving wheel to rotate, and a belt or chain is used between the driving wheel and the driven wheel. To connect, the front suction piece is fixed to a belt or chain. 7. An unpacking device according to claim 3, characterized in that: a box pressing mechanism is provided on both sides of the box bin, and the two box pressing mechanisms are arranged axially symmetrically; the lateral displacement component is a box pressing cylinder, and the longitudinal displacement The component is the pressure plate cylinder.