CN221343261U - Wear-resistant metal plate paper backing machine - Google Patents

Abstract

The utility model discloses an anti-abrasion metal plate paper-backing machine, which comprises a conveying device, wherein a plate material feeding device and a stacking device are respectively arranged at two ends of the conveying device, a paper-backing feeding device is arranged at one side of the stacking device, and a tray is arranged below the stacking device; the stacking device comprises vertical plates which are oppositely arranged, a first air cylinder and a second air cylinder are arranged on the outer sides of the vertical plates, a first supporting plate and a second supporting plate which face horizontally are arranged at the output ends of the first air cylinder and the second air cylinder respectively, the first supporting plate and the second supporting plate can extend between the two vertical plates, the full-automatic operation effect that paper sheets are placed between two plate bodies for blocking is achieved through the mutual matching of the plate feeding device, the conveying device, the paper padding feeding device and the stacking device, the contact between personnel and the plate bodies is reduced, scratches caused by personnel touching can be further avoided when the working efficiency is improved, the appearance of the plate body is greatly kept from being damaged, and the protection of parts is achieved.

Description

Wear-resistant metal plate paper backing machine

Technical Field

The utility model belongs to the technical field of packaging equipment, and particularly relates to a wear-resistant metal plate backing machine.

Background

The processing of a product requires a plurality of working procedures, each working procedure can be carried out on different equipment or can be sent to different companies for manufacturing, and under the condition that the appearance of the product has strict requirements, protection measures are required to be carried out on the surface of the product whenever the product needs to be transported; for example, a metal plate subjected to secondary injection molding has a formed surface and an LED package support, and then the plate needs to be stacked and stored for compressing space in the transferring process, and the LED support is formed, so that the film cannot be protected any more, and in the prior art, in order to avoid the mutual scratch of the support and the metal plate, a piece of paper is usually placed between the seat metal plates to serve as a barrier;

At present, most of the prior art is manually stacked based on the hand, and the mode of manually stacking is free from contact between the palm and the plate, so that not only is hand sweats generated, but also the risk of damaging the bracket is generated.

Disclosure of utility model

The utility model aims to provide an anti-abrasion metal plate paper backing machine, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The wear-resistant metal plate paper packing machine comprises a conveying device, wherein a plate feeding device and a stacking device are respectively arranged at two ends of the conveying device, a paper packing feeding device is arranged at one side of the stacking device, and a tray is arranged below the stacking device;

The stacking device comprises oppositely arranged vertical plates, a first cylinder and a second cylinder are arranged on the outer sides of each vertical plate up and down, a first supporting plate and a second supporting plate which face horizontally are respectively arranged at the output ends of the first cylinder and the second cylinder, and the first supporting plate and the second supporting plate can extend into the space between the two vertical plates.

According to a further technical scheme, the two vertical plates and the conveying device are integrally structured.

According to a further technical scheme, a first moving assembly is arranged at the bottom of the tray.

According to a further technical scheme, the plate feeding device comprises a first storage and transportation assembly and a lifting assembly, an L-shaped bearing frame is arranged at the output end of the lifting assembly, a fourth air cylinder is vertically arranged at the upper part of the bearing frame, and a pressing block is arranged at the output end of the fourth air cylinder;

The bearing frame corresponds to the output end of the first storage and transportation assembly, a plurality of material boxes are arranged on the first storage and transportation assembly, and a plurality of plate material bodies are stacked in the material boxes at intervals;

And a pushing component for pushing out the plate is also arranged at the position corresponding to the bearing frame.

Further technical scheme, push assembly installs the output at storage transportation subassembly one, including the cylinder five of horizontal setting, the cylinder five surfaces are equipped with the sliding pair, the sliding pair is connected with the ejector pin that is "U" type, the ejector pin is connected with connecting block one, connecting block one is connected with the output of cylinder five.

According to a further technical scheme, a recovery assembly for recovering the material box is arranged below the first storage and transportation assembly.

Further technical scheme, retrieve the subassembly and include the cylinder III, the three output of cylinder is equipped with the connecting block II, two poking rods are erect to the connecting block II, two the width between the poking rods is greater than the width of bearing frame.

Further technical scheme, packing paper loading attachment includes storage transportation subassembly two and multiaxis removal subassembly two, be equipped with a plurality of standing grooves that are used for stacking the packing paper on the storage transportation subassembly two, the removal end of multiaxis removal subassembly two transversely installs two-way cylinder and adsorption component respectively, the adsorption component's adsorption end is located two-way cylinder's below, the piece of stirring is installed to two-way cylinder's output.

According to a further technical scheme, baffles are arranged on two sides of the upper edge of the placing groove, and the distance between the two baffles is smaller than the length of the backing paper.

According to a further technical scheme, an ejection assembly is arranged at the bottom of the second storage and transportation assembly, and the ejection assembly can extend into the placing groove to upwards lift the paper sheets.

The utility model has the beneficial effects that:

According to the utility model, through the mutual matching of the plate feeding device, the conveying device, the paper-packing feeding device and the stacking device, the full-automatic operation effect of blocking the paper sheets placed between the two plate bodies is realized, the contact between personnel and the plate bodies is reduced, the work efficiency is improved, meanwhile, the scratch caused by the personnel touching can be further avoided, the appearance of the plate bodies is greatly kept from being damaged, and the parts are protected.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

Fig. 1: the first three-dimensional structure diagram of the utility model.

Fig. 2: the second three-dimensional structure diagram of the utility model.

Fig. 3: the utility model is an enlarged view of section a of fig. 2.

Fig. 4: the structure diagram of the conveying device, the stacking device and the packing paper feeding device is provided.

Fig. 5: the stacked device structure of the present utility model.

Fig. 6: the structure diagram of the paper backing feeding device is shown in the specification.

Fig. 7: the action schematic diagram of the paper cushion feeding device is provided.

Fig. 8: the plate feeding device structure diagram I of the utility model.

Fig. 9: the plate feeding device structure diagram II is provided.

Reference numerals: 1-conveying device, 2-sheet material loading device, 21-storage conveying component I, 22-lifting component, 23-bearing frame, 241-cylinder IV, 242-briquetting, 251-magazine, 252-clamping groove, 26-pushing component, 261-cylinder V, 262-sliding pair, 263-ejector rod, 264-connecting block I, 27-recycling component, 271-cylinder III, 272-connecting block II, 273-poking rod, 3-stacking device, 31-vertical plate, 32-cylinder I, 33-cylinder II, 34-supporting plate I, 35-supporting plate II, 36-top plate, 4-paper-backing feeding device, 41-storage conveying component II, 42-multiaxial moving component II, 431-placing groove, 432-baffle, 441-bidirectional cylinder, 442-adsorbing component, 443-poking block, 51-tray, 52-moving component I and 6-workbench.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Please refer to fig. 1-9;

The metal plate paper backing machine aims to solve the problem that the appearance is affected due to the fact that the surfaces of metal plates are scratched in a mutual rubbing manner in the stacking process; the device specifically comprises a conveying device 1, wherein a plate material feeding device 2 and a stacking device 3 are respectively arranged at two ends of the conveying device 1, a paper packing feeding device 4 is arranged at one side of the stacking device 3, and a tray 51 is arranged below the stacking device 3;

When the device works, firstly, the plate feeding device 2 sends a plate body to the end part of the conveying device 1, then the plate body is conveyed into the stacking device 3 under the drive of the conveying device 1, meanwhile, the paper padding feeding device 4 operates and conveys paper sheets into the stacking device 3, in the embodiment, the stacking device 3 comprises opposite vertical plates 31, preferably, two vertical plates 31 are aligned with two sides of the conveying device 1, a first cylinder 32 and a second cylinder 33 are arranged on the outer side of each vertical plate 31 up and down, the output ends of the first cylinder 32 and the second cylinder 33 are respectively provided with a first oriented supporting plate 34 and a second supporting plate 35, and the first supporting plate 34 and the second supporting plate 35 can extend into between the two vertical plates 31;

In the initial state, the two air cylinders 33 positioned below are in an extending state, so that the two support plates II 35 extend to the space between the two vertical plates 31, at the moment, the plate body falls into the space between the two vertical plates 31 under the drive of the conveying device 1 and is supported by the extending support plates II 35, and a top plate 36 can be arranged between the two vertical plates 31, so that the position of the plate body is further limited, and the falling direction of paper sheets is limited; the first two cylinders 32 are then extended so that the first pallet 34 extends between the two risers 31 and the first pallet 34 is above the second pallet 35, preferably the first pallet 34 and the second pallet 35 differ in height by less than 2cm; at this time, the paper sheet is placed on the two supporting plates 34 by the paper-backing feeding device 4, and it should be noted that the width between the two vertical plates 31 is only slightly larger than the widths of the plate body and the paper sheet respectively, so that the position of the plate body and the paper sheet can be defined;

The first two cylinders 32 retract to drive the first two supporting plates 34 to exit the space formed by the two vertical plates 31, at the moment, paper sheets fall under the action of gravity, the falling distance is short, the falling paper sheets are limited at the positions of the two vertical plates 31 and cannot swing left and right in the falling process, and finally the falling paper sheets fall on the upper surface of the plate body; then the two second air cylinders 33 retract to drive the two second supporting plates 35 to withdraw from the space formed by the two vertical plates 31, at the moment, the plate body and the paper sheet simultaneously fall into the tray 51 under the action of gravity, and the follow-up operation mode is the same, so that the lower surface of the plate body of the latter piece can be contacted with the paper sheet positioned on the tray 51 before, but not contacted with the plate body of the former piece, and the purpose of paper padding between the two plate bodies is achieved.

The utility model is not limited to the up-down state of the paper sheet and the plate body in the initial state, and the embodiment is that the paper sheet is up and the plate body is down; the embodiment of the plate material is that the paper sheet is arranged below and the plate material is arranged above under the same structure;

In the initial state, the two air cylinders 33 positioned below are in an extending state, so that the two support plates II 35 extend to a position between the two vertical plates 31, at the moment, a paper sheet feeding device places paper sheets between the two vertical plates 31 and supports the paper sheets by the two support plates II 35, then the two air cylinders I32 extend, so that the support plates I34 extend to a position between the two vertical plates 31, the support plates I34 are positioned above the support plates II 35, at the moment, the plate body falls into a space between the two vertical plates 31 under the driving of the conveying device 1 and is supported by the extending support plates I34; at this time, the state that the paper sheets are arranged downwards and the plate body is arranged upwards is formed;

Then, the first two air cylinders 32 retract to drive the first two supporting plates 34 to withdraw from the space formed by the two vertical plates 31, the plate body falls under the action of gravity, the lower plate body is limited at the positions of the two vertical plates 31 and does not swing left and right in the falling process, and finally the plate body falls on the upper surface of a paper sheet; then the two second air cylinders 33 retract to drive the two second supporting plates 35 to withdraw from the space formed by the two vertical plates 31, at the moment, the plate body and the paper sheet simultaneously fall into the tray 51 under the action of gravity, and the follow-up operation mode is the same, so that the lower surface of the paper sheet of the latter piece can be contacted with the upper surface of the plate body of the former piece positioned on the tray 51, but not contacted with the plate body of the former piece, and the purpose of paper padding between the two plate bodies is achieved.

Based on the further description of the two cases, a plurality of laser sensors can be arranged in the equipment for detecting whether the feeding is completed, and the time is calculated to determine the action time of the first air cylinder 32 and the second air cylinder 33; or the system presets the action sequence and time of the first cylinder 32 and the second cylinder 33, and is matched with the sensor arranged in the conveying device 1 and used for detecting whether the plate body is fed or not, and when the feeding of the plate body is sensed, the timing is started, and the action is performed in the appointed time.

Through the mutually supporting of sheet material loading attachment 2, conveyor 1, filler paper loading attachment 4 and stacking device 3, realize being located between two sheet material bodies and place the scraps of paper and carry out the full automatization operation effect of separation, reduce personnel and the contact of sheet material body, when promoting work efficiency, can also further avoid personnel to touch the mar that leads to, greatly keep the outward appearance of sheet material body not destroyed to the protection of part.

In this embodiment, the two risers 31 and the conveying device 1 are integrally configured, that is, the two first cylinders 32 and the two second cylinders 33 are respectively installed on the side wall of the conveying device 1, but the stacking position does not have the function of forward conveying, and if the conveying is performed by adopting the belt pulley group, the end of the belt pulley group reaches the stacking position.

In this embodiment, a first moving component 52 is installed at the bottom of the tray 51, the tray 51 has a larger space, and the stacked plate bodies only occupy a part of the space, and after one position of the tray 51 is fully placed, the first moving component 52 drives the tray 51 to move back and forth, so that other spaces of the tray 51 correspond to the lower parts of the two vertical plates 31.

Further, a plurality of independent spaces are partitioned in the tray, each of the four cells is assumed to be capable of stacking N plate bodies, after one cell is filled, the tray 51 is driven to move back and forth through the first moving component 52, so that the space without materials is moved below the stacking device, after the four cells are filled, the first moving component 52 moves the tray out, the full plate tray is manually carried away and then an empty tray is put to the first moving component 52, and the first moving component 52 moves the first receiving position of the tray to the lower part of the stacking device and then receives materials sequentially.

The utility model relates to one embodiment of a plate feeding device 2, which specifically comprises a first storage and transportation assembly 21 and a lifting assembly 22, wherein an L-shaped bearing frame 23 is arranged at the output end of the lifting assembly 22, a fourth cylinder 241 is vertically arranged at the upper part of the bearing frame 23, and a pressing block 242 is arranged at the output end of the fourth cylinder 241; the bearing frame 23 corresponds to the output end of the first storage and transportation assembly 21, a plurality of material boxes 251 are placed on the first storage and transportation assembly 21, and a pushing assembly 26 for pushing out the plate is also arranged at the position corresponding to the bearing frame 23;

When the carrying frame 23 does not have any material box 251, the bottom of the carrying frame 23 is aligned with the outlet end of the first storage and transportation assembly 21 under the drive of the lifting assembly 22, at this time, the material box 251 is pushed forward under the drive of the first storage and transportation assembly 1, one material box 251 enters the carrying frame 23, then the fourth cylinder 241 is started to press the pressing block 242 on the bottom of the material box 251, and the pressing block 242 is matched with the carrying frame 23 to fix the material box 251;

In this embodiment, a plurality of horizontally oriented clamping grooves 252 are longitudinally arranged in the arrangement of the material box 251, each clamping groove 252 is provided with a plate body, that is, a state of being stacked at intervals is formed, one end of each clamping groove 252 corresponds to the conveying device 1, and the other end corresponds to the corresponding conveying component;

In the initial state, the clamping groove 252 at the lowest position corresponds to the inlet of the conveying device 1, then the plate material body is pushed out of the clamping groove 252 by the pushing component 26 and falls into the conveying device 1, after the plate material body is completed, the lifting component 22 drives the bearing frame 23 to descend, the material box 251 moves downwards, and the other clamping groove 252 corresponds to the inlet of the conveying device 1.

The pushing component 26 in the embodiment is installed at the output end of the first storage and transportation component 21 and corresponds to the position of the bearing frame 23, and comprises a cylinder five 261 which is transversely arranged, a sliding pair 262 is arranged on the surface of the cylinder five 261, the sliding pair 262 is connected with a U-shaped ejector rod 263, the ejector rod 263 is connected with a first connecting block 264, and the first connecting block 264 is connected with the output end of the cylinder five 261; when the plate body needs to be ejected, the cylinder five 261 stretches out, so that the U-shaped ejector rod 263 stretches into the material box 251, at the moment, the U-shaped ejector rod 263 just corresponds to the plate body, the U-shaped ejector rod 263 abuts against one side of the plate body, and the plate body is separated from the clamping groove 252 under the continuous stretching effect and enters the conveying device 1.

In this embodiment, a recovery component 27 for recovering the first storage and transportation component 21 is installed below the first storage and transportation component 21, after the last sheet material in the first storage and transportation component 251 is used up, the first storage and transportation component 251 is driven by the lifting component 22 to move down further, so that the height of the first storage and transportation component 251 is lower than that of the first storage and transportation component 21, then the fourth cylinder 241 drives the pressing block 242 to separate from the first storage and transportation component 251, the first storage and transportation component 251 is pulled out from the carrier 23 by the recovery component 27, so that the first storage and transportation component 251 is placed below the first storage and transportation component 21, the carrier 23 is empty at this time, and is lifted up under the driving of the lifting component 22, and then the first storage and transportation component 21 sends the second storage and transportation component 251 into the carrier 23.

Further, all devices should be mounted on the table 6, so that the recovery assembly 27 pulls the cassette 251 from the carrier 23, so that the cassette 251 is placed under the first storage and transport assembly 21 and should be carried by the table 6, and also so that the bottom of the carrier 23 is aligned with the table 6 to avoid steps, so that the recovery assembly 27 pulls the cassette 251 more smoothly and unobstructed.

The following further describes the recycling assembly 27, specifically including a third cylinder 271, where the third cylinder 271 is mounted at the bottom of the workbench 6, the output end of the third cylinder 271 is provided with a second connection block 272, the second connection block 272 is vertically provided with two toggle levers 273, the width of the toggle levers 273 is greater than the width of the carrier 23, and the width of the magazine 251 is greater than the width of the bottom of the carrier 23; in the initial state, the third cylinder 271 is in an extended state, so that the two toggle rods 273 are close to the lifting assembly 22, when the carrier 23 drives the material box 251 to descend to a designated position, the upright parts of the two toggle rods 273 correspond to the parts of the material box 251 extending out of the carrier 23, and when the third cylinder 271 drives the two toggle rods 273 to retract, the upright parts of the toggle rods 273 are in contact with the material box 251, so that the material box 251 is pulled to slide out of the carrier 23.

The utility model relates to one embodiment of a packing paper feeding device 4, which specifically comprises a second storage and transportation assembly 41 and a second multi-shaft moving assembly 42, wherein the second storage and transportation assembly 41 is provided with a plurality of placing grooves 431 for stacking packing paper, the moving end of the second multi-shaft moving assembly 42 is respectively and transversely provided with a bidirectional cylinder 441 and an adsorption assembly 442, the adsorption end of the adsorption assembly 442 is positioned below the bidirectional cylinder 441, and the output end of the bidirectional cylinder 441 is provided with a stirring block 443; the paper sheets used in this embodiment are relatively thin, so that stacked paper sheets are liable to be mutually adsorbed;

The height of the adsorption end of the adsorption assembly 442 in this embodiment is smaller than the height of the end of the stirring block 443, so the end of the stirring block 443 contacts with the paper sheet before the adsorption end, and the stacked paper sheets are easy to adsorb each other, so when the adsorption assembly 442 is operated, the bidirectional cylinder and the adsorption assembly 442 are driven by the second multi-axis moving assembly 42 to approach the placing groove 431, the bidirectional cylinder is in an open state, the lower ends of the two stirring blocks 443 contact with and exert some pressure before the stacked paper sheets, then the bidirectional cylinder contracts to drive the two stirring blocks 443 to approach each other, so that the first paper sheet is wrinkled and raised, the action of grabbing the paper sheets by a human hand is simulated, so that the adsorption force between the first paper sheet and the second paper sheet is lost, and at the same time, the raised part is sucked by the adsorption assembly 442, so as to complete the acquisition process of the paper sheets.

Preferably, the end of the poking block 443 is arc-shaped, so that damage to the paper sheet can be reduced as much as possible, and meanwhile, the contact area with the paper sheet can be increased, and friction force is increased to drive the paper sheet to bulge.

In this embodiment, the two sides of the upper edge of the placement groove 431 are provided with the baffle 432, the distance between the two baffle 432 is smaller than the length of the paper sheet, when one paper sheet is adsorbed, the baffle 432 is touched to generate bending in the ascending process, so that the paper sheet can come out from between the two baffle 432, if the second paper sheet is still provided under the first paper sheet, deformation can occur when the first paper sheet is bent, the contact area of the two paper sheets is changed, thereby eliminating the adsorption force between the two paper sheets, so that the second paper sheet can not follow to rise continuously, but can fall into the placement groove 431, and the description is that the cross-sectional area of the placement groove 431 is only slightly larger than the area of the paper sheet, so that great position deviation can not occur when the paper sheet falls into the placement groove 431, and the subsequent stacking step with the plate body can not be affected.

In this embodiment, an ejector assembly is installed at the bottom of the second storage and transportation assembly 41, and the ejector assembly can extend into the placement groove 431 to lift the paper sheet upwards.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the embodiments of the disclosure may be suitably combined to form other embodiments as will be understood by those skilled in the art.

Claims (10)

1. An antiwear sheet metal backing paper machine which is characterized in that: the automatic feeding device comprises a conveying device (1), wherein a plate feeding device (2) and a stacking device (3) are respectively arranged at two ends of the conveying device (1), a paper-backing feeding device (4) is arranged at one side of the stacking device (3), and a tray (51) is arranged below the stacking device (3);

The stacking device (3) comprises oppositely arranged vertical plates (31), a first cylinder (32) and a second cylinder (33) are arranged on the outer sides of each vertical plate (31) up and down, a first supporting plate (34) and a second supporting plate (35) which face horizontally are respectively arranged at the output ends of the first cylinder (32) and the second cylinder (33), and the first supporting plate (34) and the second supporting plate (35) can extend into the space between the two vertical plates (31).

2. The wear resistant sheet metal liner of claim 1, wherein: the two vertical plates (31) and the conveying device (1) are integrally structured.

3. The wear resistant sheet metal liner of claim 1, wherein: the bottom of the tray (51) is provided with a first moving component (52).

4. The wear resistant sheet metal liner machine of claim 1 or 2, wherein: the plate feeding device (2) comprises a first storage and transportation assembly (21) and a lifting assembly (22), an L-shaped bearing frame (23) is arranged at the output end of the lifting assembly (22), a fourth cylinder (241) is vertically arranged at the upper part of the bearing frame (23), and a pressing block (242) is arranged at the output end of the fourth cylinder (241);

The bearing frame (23) corresponds to the output end of the first storage and transportation assembly (21), a plurality of material boxes (251) are arranged on the first storage and transportation assembly (21), and a plurality of plate material bodies are stacked in the material boxes (251) at intervals;

and a pushing component (26) for pushing out the plate is arranged at the position corresponding to the bearing frame (23).

5. The wear resistant sheet metal liner of claim 4, wherein: the pushing assembly (26) is arranged at the output end of the first storage and transportation assembly (21) and comprises a fifth cylinder (261) which is transversely arranged, a sliding pair (262) is arranged on the surface of the fifth cylinder (261), the sliding pair (262) is connected with a push rod (263) which is U-shaped, the push rod (263) is connected with a first connecting block (264), and the first connecting block (264) is connected with the output end of the fifth cylinder (261).

6. The wear resistant sheet metal liner of claim 4, wherein: a recovery assembly (27) for recovering the material box (251) is arranged below the first storage and transportation assembly (21).

7. The wear resistant sheet metal liner of claim 6, wherein: the recycling assembly (27) comprises a third cylinder (271), a second connecting block (272) is arranged at the output end of the third cylinder (271), two toggle rods (273) are vertically arranged on the second connecting block (272), and the width between the two toggle rods (273) is larger than that of the bearing frame (23).

8. The wear resistant sheet metal liner machine of claim 1 or 2, wherein: the packing paper loading attachment (4) is including storage transportation subassembly two (41) and multiaxis remove subassembly two (42), be equipped with a plurality of standing grooves (431) that are used for stacking the packing paper on the storage transportation subassembly two (41), the removal end of multiaxis remove subassembly two (42) transversely installs two-way cylinder (441) and adsorption component (442) respectively, the adsorption end of adsorption component (442) is located the below of two-way cylinder (441), stir piece (443) are installed to the output of two-way cylinder (441).

9. The wear resistant sheet metal liner of claim 8, wherein: baffle plates (432) are arranged on two sides of the upper edge of the placing groove (431), and the distance between the two baffle plates (432) is smaller than the length of the backing paper.

10. The wear resistant sheet metal liner of claim 8, wherein: an ejection assembly is arranged at the bottom of the second storage and transportation assembly (41), and can extend into the placing groove (431) to lift the paper sheet upwards.