CN217417425U

CN217417425U - Feeding device

Info

Publication number: CN217417425U
Application number: CN202220881070.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-09-13
Anticipated expiration: 2032-04-15

Abstract

The application discloses loading attachment includes: the first feeding position is used for placing a material box filled with a plurality of overlapped sheet materials; the conveying belt is provided with a plurality of hole bodies and is used for adsorbing the flaky materials; the first airflow driving part is used for driving the sheet material at the uppermost layer to ascend through airflow and separating the sheet material from the sheet material below; the conveyer belt can adsorb the sheet material on the uppermost layer and convey the sheet material out after the sheet material on the uppermost layer rises and is separated from the sheet material below. The application provides a loading attachment can realize not having fast material loading of space.

Description

Feeding device

Technical Field

The application relates to the technical field of mechanical equipment, in particular to a feeding device.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

For sheet materials such as silicon wafers and the like, a sucker is generally adopted in the existing feeding mode. Specifically, the sucker moves to the position above the material, then the sucker descends to suck the material, and then the sucker ascends to convey the material to a specific position.

However, the existing feeding method reaches the bottleneck of speed increase, and cannot meet the use requirement under the condition of higher speed.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions in the present specification and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present specification.

SUMMERY OF THE UTILITY MODEL

The main technical problem who solves of this application provides a loading attachment, can realize not having fast material loading of clearance.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided a loading device, including:

the first feeding position is used for placing a material box filled with a plurality of overlapped sheet materials;

the conveying belt is provided with a plurality of hole bodies and is used for adsorbing the flaky materials;

the first airflow driving part is used for driving the sheet material at the uppermost layer to ascend through airflow and separating the sheet material from the sheet material below;

the conveyer belt can adsorb the sheet material on the uppermost layer and convey the sheet material out after the sheet material on the uppermost layer rises and is separated from the sheet material below.

Further, loading attachment still includes:

and the second air flow driving part is used for driving the flaky materials on the uppermost layer to continuously rise to be attached to the conveying belt through air flow after the flaky materials on the uppermost layer rise and are separated from the flaky materials below.

Further, the first airflow driver comprises a bernoulli chuck; the loading attachment still includes:

the controller is electrically connected with the first sensor and the Bernoulli chuck respectively, and the first sensor is used for sensing that the uppermost layer of the flaky material is close to the conveyor belt by a first preset distance and then generating a first signal; the controller is configured to stop operation of the bernoulli chuck in response to the first signal.

Further, loading attachment still includes:

the jacking assembly and the second sensor are respectively and electrically connected with the controller;

the jacking assembly is used for jacking the sheet materials in the material box away from the bottom of the material box before the first airflow driving part drives the uppermost sheet materials to ascend through airflow;

the second sensor is used for sensing that the sheet material on the uppermost layer approaches to a second preset distance from the conveyor belt and then generating a second signal; the controller is used for responding to the second signal and stopping the operation of the jacking assembly; the second preset distance is greater than the first preset distance.

Further, loading attachment still includes:

the mounting plate is fixedly arranged on one side, away from the first feeding position, of the conveyor belt; the conveying belt is attached to the mounting plate; the mounting panel is equipped with the mounting hole, the Bernoulli sucking disc with first sensor is fixed to be located in the mounting hole.

Furthermore, a cavity is arranged in the mounting plate, the cavity is communicated with the hole body, and the cavity is connected with the second airflow driving piece; the second airflow driving part comprises a vacuum generator used for vacuumizing the cavity.

Further, the first airflow driving part comprises an air knife, and the air knife is positioned between the first feeding position and the conveyor belt and is used for distributing the sheet materials; the air knife is provided with a first air opening and a second air opening, the first air opening is located between the second air opening and the conveyor belt, and the wind power of the second air opening is larger than that of the first air opening.

Further, the first air port and the second air port are arranged at intervals along the vertical direction; in the vertical direction, the length of the first air opening is greater than that of the second air opening.

Furthermore, a plurality of air knives are respectively fixedly arranged on two opposite sides of the conveyor belt along a first direction, the connecting line of any two first air openings is intersected with the first direction, and the connecting line of any two second air openings is intersected with the first direction; the first direction is perpendicular to the vertical direction.

Further, loading attachment still includes:

the second material loading position is used for placing a material box filled with a plurality of overlapped sheet materials;

the first transferring position is used for conveying the material boxes filled with the sheet materials to the first loading position when the second loading position is used for loading materials, and removing empty material boxes from the first loading position after the first loading position is used for loading materials;

the second transfer position is used for conveying the material box filled with the sheet materials to the second feeding position when the first feeding position is used for feeding materials, and removing empty material boxes from the second feeding position after the second feeding position is used for feeding materials; the first transfer position and the second transfer position are respectively positioned on two opposite sides of the first loading position along a first direction;

a receiving location for delivering cartridges containing the sheet material to the first and second transfer locations and for removing empty cartridges from the first and second transfer locations; the material receiving position and the second material loading position are respectively located on two opposite sides of the first material loading position in the second direction, and the first direction is vertical to the second direction.

Different from the prior art, the beneficial effects of the application are that: the feeding device provided by the embodiment of the application is provided with the first airflow driving part, the sheet material on the uppermost layer is driven to rise through airflow and is separated from the sheet material below, and therefore the conveying belt provided with the plurality of holes can adsorb the sheet material on the uppermost layer and convey the sheet material out. Different from the feeding mode in which the sucking disc needs to wait for descending in the prior art, the feeding device provided by the embodiment can enable the flaky materials to be continuously in a flaky state, so that gapless rapid feeding can be realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic structural diagram of a feeding device provided in this embodiment;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

fig. 3 is a schematic structural diagram of a load bearing assembly provided in the present embodiment;

FIG. 4 is a schematic view of a magazine according to the present embodiment;

fig. 5 is a schematic structural view of an air knife provided in the present embodiment;

FIG. 6 is a schematic view of the position relationship between the air knife and the material box provided in the present embodiment;

FIG. 7 is a top view of a load bearing assembly provided in the present embodiment;

fig. 8 is a schematic diagram of a path for carrying away the empty material box according to the present embodiment.

Description of reference numerals:

1. a first loading level; 2. a conveyor belt; 3. a first airflow driver; 4. a magazine; 5. a Bernoulli chuck; 6. a first sensor; 7. a jacking assembly; 8. a second sensor; 9. a load bearing assembly; 10. a first notch; 11. a base plate; 12. a motor; 13. a slide rail; 14. a slider; 15. mounting a plate; 16. a support; 17. an air knife; 171. a first tuyere; 172. a second tuyere; 18. a second loading position; 19. a first transfer station; 20. a second transfer site; 21. receiving a material position; x, a first direction; y, a second direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1 to 8. The embodiment of the application provides a loading device, including first material loading level 1, conveyer belt 2 and first air current driving piece 3.

Wherein the first loading level 1 is used for placing a magazine 4 containing a plurality of stacked sheet materials. The conveyor belt 2 is provided with a plurality of porous bodies (not shown) for adsorbing the sheet-like materials. The first air flow driving member 3 is used for driving the sheet material at the uppermost layer to ascend through air flow and separating the sheet material from the sheet material below. The conveyer belt 2 can adsorb the flaky materials on the uppermost layer and convey the flaky materials out after the flaky materials on the uppermost layer rise and are separated from the flaky materials below.

The feeding device that this application embodiment provided is equipped with first air current driving piece 3, rises and separates with the slice material of below through the slice material of air current drive superiors to the slice material of the superiors can be adsorbed to conveyer belt 2 that is equipped with a plurality of hole bodies, and carries away it. Different from the feeding mode in which the sucking disc needs to wait for descending in the prior art, the feeding device provided by the embodiment can enable the flaky materials to be continuously in a flaky state, so that gapless rapid feeding can be realized.

The sheet material in this embodiment may be a silicon wafer, or may be other light and thin sheet materials. The flaky materials are horizontally stacked in the material box 4, and of course, the flaky materials can also be approximately in a horizontal state and form a smaller included angle with the horizontal plane, which is not limited by the application. The hole bodies of the conveying belt 2 are distributed densely, so that the conveying belt has a better adsorption effect and can adsorb and transfer the flaky materials to other positions.

In this embodiment, the feeding device may further include a second air flow driving member (not shown) for driving the uppermost sheet material to continuously rise to fit the conveyor belt 2 by the air flow after the uppermost sheet material rises and is separated from the lower sheet material. Specifically, the second airflow driving member can vacuumize the hole body of the conveyor belt 2, so that the conveyor belt 2 can adsorb the flaky materials.

In this embodiment, the first airflow driver 3 may comprise a bernoulli chuck 5. A vacuum can be created between the bernoulli chuck 5 and the uppermost sheet material, so that the bernoulli chuck 5 can lift and separate the uppermost sheet material from the sheet material below it.

Specifically, the feeding device may further include a controller (not shown) and a first sensor 6. The controller is electrically connected to the first sensor 6 and the bernoulli chuck 5, respectively. The first sensor 6 is used for sensing that the uppermost sheet material approaches to a first preset distance from the conveyor belt 2 and then generating a first signal. The controller is adapted to stop the operation of the bernoulli chuck 5 in response to the first signal.

Wherein the first sensor 6 may be a proximity sensor. When the uppermost layer of the flaky material rises to a first preset distance away from the conveyor belt 2, the proximity sensor can sense the flaky material and generate a first signal to be transmitted to the controller, the controller stops the work of the Bernoulli chuck 5 according to the received first signal, and then the second air flow driving piece drives the flaky material to continuously rise to be attached to the conveyor belt 2.

In this embodiment, the feeding device may further include a jacking assembly 7 and a second sensor 8. The jacking component 7 and the second sensor 8 are electrically connected with the controller respectively.

The jacking assembly 7 is used for jacking the sheet materials in the material box 4 away from the bottom of the material box 4 before the first air flow driving part 3 drives the uppermost sheet materials to ascend through air flow. The jacking assembly 7 may be located below the first loading level 1.

In particular, the first loading level 1 is provided with a carrier assembly 9, above which carrier assembly 9 the magazine 4 can be placed. As shown in fig. 3, the bearing assembly 9 is provided with a first notch 10 for the jacking assembly 7 to pass through. Meanwhile, a second notch (not shown) is formed on one side of the magazine 4 facing the bearing component 9, that is, the bottom of the magazine 4 is provided with the second notch. The second notch and the first notch 10 are aligned in the vertical direction. As shown in fig. 4, a movable pad 11 is disposed in the magazine 4, and the pad 11 is located below the sheet material and above the second notch. The jacking assembly 7 can penetrate through the first notch 10 and the second notch to jack the sheet material and the backing plate 11.

As shown in fig. 1, the loading device may be provided with a motor 12 to drive the jacking assembly 7 to ascend or descend. The removal end of motor 12 links to each other with jacking subassembly 7, and motor 12 can be linear electric motor, servo motor etc. and this application does not do only limited to this. The controller may be electrically connected to the motor 12.

Specifically, the motor 12 drives the jacking assembly 7 to ascend, the bearing assembly 9 and the material box 4 cannot ascend along with the jacking assembly, and the backing plate 11 in the material box 4 and the sheet-shaped materials placed on the backing plate 11 can ascend along with the jacking assembly. The jacking assembly 7 may be provided on a slide rail 13 extending in a vertical direction. The jacking assembly 7 can be connected with the slide rail 13 in a sliding way through a slide block 14, and the slide block 14 can move on the slide rail 13 along the vertical direction. The motor 12 may be fixedly mounted on the slide rail 13 and located below the jacking assembly 7.

In this embodiment, the second sensor 8 is configured to generate a second signal after sensing that the uppermost sheet material is approaching a second predetermined distance from the conveyor belt 2. The controller is used for responding to the second signal and stopping the operation of the jacking assembly 7. The second preset distance is greater than the first preset distance. The second sensor 8 may be a laser sensor. When all the flaky materials in the material box 4 are jacked up to the preset position by the jacking assembly 7, the laser sensor senses the flaky materials, namely, the flaky materials on the uppermost layer are at a second preset distance from the conveyor belt 2, the laser sensor generates a second signal and transmits the second signal to the controller, and the controller controls the motor 12 to stop working according to the received second signal. The predetermined position may be a second predetermined distance from the conveyor belt 2, and other parts besides the conveyor belt 2 may be used as references, which is not limited in this application.

In this embodiment, as shown in fig. 1 and fig. 2, the feeding device may further include an installation plate 15, which is fixedly disposed on a side of the conveyor belt 2 away from the first feeding position 1, and the conveyor belt 2 and the installation plate 15 are attached to each other, that is, a part of the conveyor belt 2 is tightly attached to a lower surface of the installation plate 15. The feeding device may further comprise a bracket 16, and the mounting plate 15 may be fixedly mounted to the bracket 16. The surface of the support 16 may be provided with a plurality of turning shafts so that the conveyor belt 2 may be provided on each turning shaft. Preferably, the conveyor belt 2 in this embodiment may have two turns, and the two turns of the conveyor belt 2 are spaced apart along the first direction X. Wherein the first direction X is the direction perpendicular to the plane of the paper in fig. 1 and 2. The spacing between the two turns of conveyor belt 2 is less than the length of the sheet material in the first direction X.

The mounting plate 15 may be provided with mounting holes (not shown) so that the bernoulli chuck 5 and the first sensor 6 can be fixedly located within the mounting holes. The mounting hole may be located directly above the first loading level 1. And the mounting hole is positioned between two circles of the conveyor belts 2, so that the orthographic projections of the Bernoulli chuck 5, the first sensor 6 and the conveyor belts 2 do not have overlapped parts on the horizontal plane, and the conveyor belts 2 cannot block the suction and the induction of the Bernoulli chuck 5 and the first sensor 6 to the sheet materials. The second sensor 8 may be fixedly mounted below the mounting plate 15.

Specifically, a cavity (not shown) may be disposed inside the mounting plate 15, the cavity is communicated with the hole of the conveyor belt 2, and the cavity is connected to the second airflow driving member, so that the second airflow driving member can act on the hole of the conveyor belt 2 through the cavity of the mounting plate 15. The cavity and the mounting hole are not communicated. The second airflow driver may include a vacuum generator for evacuating the cavity. The second airflow driver may also be a fan. The position of the second airflow driver is not limited in this embodiment. The second airflow driving part can vacuumize the cavity of the mounting plate 15, and the vacuum can penetrate through the dense holes of the conveyor belt 2, so that the rotating conveyor belt 2 has vacuum adsorption force.

In this embodiment, the first airflow driver 3 may further comprise an air knife 17. The air knife 17 is positioned between the first loading position 1 and the conveyor belt 2 and is used for distributing the sheet materials. As shown in fig. 5, the air knife 17 is provided with a first air opening 171 and a second air opening 172. The first tuyere 171 is located between the second tuyere 172 and the conveyor belt 2, i.e., the first tuyere 171 is located above the second tuyere 172. The wind power of the second tuyere 172 is greater than that of the first tuyere 171.

Specifically, the first tuyere 171 and the second tuyere 172 are arranged at intervals in the vertical direction, so that the first tuyere 171 and the second tuyere 172 are not communicated with each other, and both the tuyeres are separately ventilated. The length of the first tuyere 171 is greater than the length of the second tuyere 172 in the vertical direction. The second tuyere 172 has a large wind force for preblowing, and can blow up a plurality of sheet materials at the same time. The first tuyere 171 is elongated in the vertical direction, and can blow out a plurality of stacked sheet materials.

As shown in fig. 6, a plurality of air knives 17 are respectively fixedly arranged on two opposite sides of the conveyor belt 2 along the first direction X, so as to act on the sheet materials in the material box 4 from two sides, and the sheet materials are conveniently blown up. Wherein the first direction X is perpendicular to the vertical direction. In fig. 2, the first direction X is a direction perpendicular to the paper surface, and in fig. 6, the first direction X is a vertical direction.

Preferably, in order to prevent the wind blades 17 from being influenced by the wind from the opposite side, a line connecting any two of the first wind ports 171 intersects the first direction X, and a line connecting any two of the second wind ports 172 intersects the first direction X. That is, the line connecting any two of the first air ports 171 is not parallel to the first direction X, the line connecting any two of the second air ports 172 is not parallel to the first direction X, and the plurality of air knives 17 are not aligned in the first direction X but are disposed in a staggered manner.

In the present embodiment, as shown in fig. 1 and 7, the feeding device further includes a second feeding position 18 for placing the magazine 4 containing a plurality of stacked sheet materials, so that after the sheet materials in the magazine 4 at the first feeding position 1 are all fed, the sheet materials in the magazine 4 at the second feeding position 18 can be fed. The mounting plate 15 can be provided with mounting holes directly above the second loading level 18, in which the bernoulli chucks 5 and the first distance sensor are arranged. The second loading level 18 is correspondingly provided with the jacking component 7 and the second sensor 8.

Specifically, as shown in fig. 7, the feeding device may further include a first transfer location 19 and a second transfer location 20. The first transfer station 19 is used for transporting the cassettes 4 filled with sheet material to the first loading station 1 during loading at the second loading station 18 and for removing empty cassettes from the first loading station 1 after loading has been completed at the first loading station 1. The second transfer station 20 is used for conveying the magazines 4 filled with sheet material to the second loading station 18 during loading at the first loading station 1 and for removing empty magazines from the second loading station 18 after loading has been completed at the second loading station 18. After the loading is completed, the empty magazine is transported away in the direction indicated by the respective arrows in fig. 8, and the full magazine 4 is fed in the opposite direction.

In a specific embodiment, the specific switching workflow of the magazine 4 is as follows: firstly, transferring one full material box 4 to a second feeding position 18, feeding at the second feeding position 18, simultaneously transferring the other full material box 4 to a first feeding position 1, and waiting for feeding; and immediately feeding the sheet material at the first feeding level 1 after the sheet material at the second feeding level 18 is fed. At this point, the empty magazine at the second loading position 18 is transported to the second transfer position 20 in the direction shown in fig. 8, and a new full magazine 4 is transported to the second loading position 18, waiting for loading. It is thus possible to switch the magazine 4 without play.

As shown in fig. 7, the loading device may also comprise a receiving station 21 for delivering cartridges 4 filled with sheet material to the first 19 and second 20 transfer stations and for removing empty cartridges from the first 19 and second 20 transfer stations. The receiving level 21 may be provided with a handling assembly for handling full cartridges 4 and empty cartridges.

Preferably, the first transfer location 19 and the second transfer location 20 may be located on opposite sides of the first loading location 1 along the first direction X, respectively. The receiving level 21 and the first loading level 1 may be located on opposite sides of the second loading level 18 in the second direction Y, respectively. The second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the vertical direction. In 7, the first direction X is a vertical direction, and the second direction Y is a horizontal direction.

In a specific application scenario, the work flow of the feeding device provided by the embodiment is as follows: after the material box 4 is in place (namely, the full material box 4 is placed at the first feeding position 1 or the second feeding position 18), the jacking component 7 jacks up and lifts the flaky material, the second sensor 8 senses that the flaky material reaches a preset position, and the motor 12 stops working. Then, the second tuyere 172 of the air knife 17 is opened to perform pre-blowing separation, and then the first tuyere 171 is opened to blow the plurality of sheet materials to a substantially suspended state. At the moment, the Bernoulli chuck 5 works to generate suction force to suck the uppermost layer of sheet materials suspended in the material box 4, when the first sensor 6 senses the sheet materials (the sheet materials do not contact the conveyor belt 2 at the moment, and the sheet materials are away from the conveyor belt 2 by a first preset distance), the Bernoulli chuck 5 stops working, and the second air flow driving part gives the vacuum suction force to the conveyor belt 2, so that the conveyor belt 2 can suck and convey the uppermost layer of sheet materials. When a piece of flaky material is moved away, the jacking mechanism can move upwards by the thickness of the piece of flaky material, so that the height of the uppermost flaky material is ensured to be unchanged. At this point the bernoulli chuck 5 is again operated and the suction process described above is repeated. The first air port 171 of the air knife 17 blows for a long time in the whole sheet suction process, and the jacking mechanism continuously jacks until the sheet materials in the material box 4 are sucked.

According to the feeding device provided by the embodiment of the application, the feeding is carried out in a mode that the air knife 17, the Bernoulli chuck 5 and the conveyor belt 2 are matched, so that the flaky materials are in a DC sheet state, and the limit transmission speed of the conveyor belt 2 can be reached; and meanwhile, the time for changing the material box 4 is saved by switching the material box 4 without clearance. Compared with the mode that the silicon wafer is sucked by descending and ascending of the sucking disc and then is conveyed to the conveying belt to move away materials in the prior art, the feeding efficiency is greatly improved.

It should be noted that, in the description of the present specification, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is present therebetween, and no indication or suggestion of relative importance is to be made. In addition, in the description of the present specification, the meaning of "a plurality" is two or more unless otherwise specified.

The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A loading device, comprising:

a first loading position for placing a material box filled with a plurality of overlapped sheet materials;

2. The loading device of claim 1, further comprising:

and the second air flow driving part is used for driving the flaky materials on the uppermost layer to continuously rise to be attached to the conveyor belt through air flow after the flaky materials on the uppermost layer rise and are separated from the flaky materials below.

3. A loading device as claimed in claim 2, wherein said first airflow drive member comprises a bernoulli chuck; the loading attachment still includes:

4. A loading device as claimed in claim 3, further comprising:

5. A loading device as claimed in claim 3, further comprising:

6. The loading device according to claim 5, wherein a cavity is provided in the mounting plate, the cavity is communicated with the hole, and the cavity is connected with the second airflow driving member; the second airflow driving part comprises a vacuum generator used for vacuumizing the cavity.

7. A loading device according to claim 1,

the first airflow driving part comprises an air knife, and the air knife is positioned between the first feeding position and the conveyor belt and is used for distributing the sheet materials; the air knife is provided with a first air opening and a second air opening, the first air opening is located between the second air opening and the conveyor belt, and the wind power of the second air opening is larger than that of the first air opening.

8. A loading device according to claim 7,

the first air opening and the second air opening are arranged at intervals along the vertical direction; in the vertical direction, the length of the first air opening is greater than that of the second air opening.

9. A loading device according to claim 8,

the air knives are fixedly arranged on two opposite sides of the conveyor belt along a first direction respectively, the connecting line of any two first air openings is intersected with the first direction, and the connecting line of any two second air openings is intersected with the first direction; the first direction is perpendicular to the vertical direction.

10. The loading device of claim 1, further comprising:

the first transfer position is used for conveying the material boxes filled with the sheet materials to the first loading position when the material is loaded at the second loading position, and removing empty material boxes from the first loading position after the material loading is finished at the first loading position;

the second transfer position is used for conveying the material box filled with the sheet materials to the second feeding position when the first feeding position is used for feeding materials, and removing empty material boxes from the second feeding position after the second feeding position is used for feeding materials; the first transfer position and the second transfer position are respectively positioned on two sides of the first loading position opposite to each other along the first direction;