CN115214939A

CN115214939A - Automatic packaging paper shredder

Info

Publication number: CN115214939A
Application number: CN202210871870.0A
Authority: CN
Inventors: 封尊伟; 史志琳
Original assignee: Binzhou Polytechnic
Current assignee: Binzhou Polytechnic
Priority date: 2022-07-24
Filing date: 2022-07-24
Publication date: 2022-10-21

Abstract

The invention relates to the field of paper shredders, in particular to an automatic packaging paper shredder, which comprises a paper shredding mechanism and an automatic packaging assembly; the automatic packaging assembly comprises a supporting plate a, an outer cylinder, a collecting bag, a supporting plate b and a supporting plate c; the paper shredding mechanism is arranged on the supporting plate a; the bottom of the supporting plate a is provided with a conical shell, and the bottom of the conical shell is vertically provided with an inner cylinder; the top of the collecting bag is sleeved on the outer wall of the inner cylinder; the outer cylinder body is arranged on the outer wall of the conical shell, and the bag pressing assembly is arranged on the outer cylinder body; the supporting plate b is arranged on the plurality of groups of supporting legs, and the bottom of the collecting bag is in contact with the supporting plate b; four groups of support plates c are respectively arranged on the four groups of support legs, and two groups of support plates c which are opposite from the front and the back are provided with correlation sensors; be provided with on the supporting leg and carry out the hot melt to the collection bag and seal the subassembly of sealing. The automatic packaging device can complete automatic packaging work, has good sealing effect, does not need to specially order the collecting bags, has low use cost, and can improve the loading capacity of a single collecting bag through vibration.

Description

Automatic packaging paper shredder

Technical Field

The invention relates to the field of paper shredders, in particular to an automatic packaging paper shredder.

Background

At present, paper shredders on the market generally plug paper into the inlet, then the paper through the cutting falls into the storage box of storing shredded paper bits, then takes out the storage box again, pours out the shredded paper bits of the inside, can't realize the automatic packing of shredded paper bits, and it is not convenient enough to use.

Chinese patent with the granted bulletin number of CN216424969U discloses a paper shredder with a packaging function, the door of the box is opened, the elastic ferrule of the packaging bag is sleeved in the annular clamping groove at the lower end of the shredded paper output port, the electric telescopic rod is extended by a certain length, the electric telescopic plate is abutted against the bottom of the packaging bag, when the shredded paper in the packaging bag reaches a certain scale value, the packaging bag needs to be replaced, the pull ring is pulled, the packaging bag drops from the shredded paper output port, because the elastic ferrule has a contraction function, the bag mouth of the packaging bag is reduced, the shredded paper is reduced to be poured out, a new packaging bag is sleeved, and the quick and convenient packaging is realized.

However, the above-mentioned known solutions have the following disadvantages: the special packaging bag is needed, namely the elastic ferrule is needed to be arranged at the top of the bag, so that the common garbage bag and the like can not meet the use requirements, the use limitation is large, the cost is high, and in addition, the elastic ferrule is difficult to shrink tightly, so that the packaging and sealing effects are poor.

Disclosure of Invention

The invention aims to provide an automatic packaging paper shredder aiming at the problem that the existing paper shredder in the background technology can not automatically package.

In one aspect, the invention provides an automatic packing shredder comprising a shredding mechanism and an automatic packing assembly; the automatic packaging assembly comprises a supporting plate a, an outer cylinder, a collecting bag, a supporting plate b and a supporting plate c;

the paper shredding mechanism is arranged on the supporting plate a, a paper feeding protective cover is vertically arranged at a feed inlet at the top of the paper shredding mechanism, and a discharge end of the paper shredding mechanism is opposite to the round hole in the supporting plate a;

the bottom of the supporting plate a is provided with a plurality of groups of supporting legs, the bottom of the supporting plate a is provided with a conical shell, and the bottom of the conical shell is vertically provided with an inner cylinder; the top of the collecting bag is sleeved on the outer wall of the inner cylinder; the outer cylinder body is vertically arranged on the outer wall of the conical shell, the bag pressing assembly is arranged on the outer cylinder body, and the bag pressing assembly extrudes and pastes the collecting bag on the outer wall of the inner cylinder body; the supporting plate b is horizontally arranged on the plurality of groups of supporting legs, and the bottom of the collecting bag is in contact with the supporting plate b; the four groups of supporting plates c are respectively arranged on the four groups of supporting legs and positioned at the inner sides of the four groups of supporting legs, and the two groups of supporting plates c which are opposite from each other in the front and back are provided with opposite sensors which are matched with each other; the four groups of supporting legs are provided with sealing assemblies for carrying out hot melting sealing on the collecting bag;

the supporting plate a is provided with a control system, the control system is in control connection with the paper shredding mechanism and the sealing assembly, and the control system is electrically connected with the correlation sensor.

Preferably, the bag pressing component comprises a threaded sleeve, a rotating rod, a supporting rod and a clamping block; the threaded sleeve is sleeved on the outer cylinder body, and threads matched with each other are arranged on the inner wall of the threaded sleeve and the outer wall of the outer cylinder body; the rotating rod is rotatably arranged at the bottom of the outer cylinder body; the middle part of the supporting rod is connected with a rotating rod, and the rotating rod is contacted with the outer edge of the bottom of the threaded sleeve; the clamping block is arranged at the bottom of the supporting rod, and the clamping block extrudes the collecting bag to be attached to the outer wall of the inner cylinder; the bag pressing component is provided with a plurality of groups along the circumferential direction of the outer cylinder body.

Preferably, the periphery wall of the threaded sleeve is provided with a plurality of groups of auxiliary rotating strips.

Preferably, the device also comprises a guide rod a, a lifting plate, a spring, a motor a and a cam; the guide rod a is vertically arranged on the support plate b; a plurality of groups of guide holes a for the guide rods a to pass through are arranged on the lifting plate; the spring is vertically arranged on the supporting plate b, and the top of the spring is connected with the bottom of the lifting plate; the motor a is arranged on the supporting plate b, an output shaft of the motor a is connected with a cam shaft, the cam is arranged on the cam shaft, and the cam is contacted with the bottom of the lifting plate; the bottom of the collecting bag is contacted with the lifting plate.

Preferably, the sealing assembly comprises a sliding plate a, a guide rod b, a clamping plate and a sliding plate b; the guide rods b are horizontally arranged on the left and right two groups of opposite supporting legs and are positioned above the outer cylinder body; the sliding plates a are arranged on the guide rods b in a transverse sliding manner, the sliding plates a are provided with four groups, and the supporting legs are provided with power components a for driving the sliding plates a on the left side and the right side of the collecting bag to mutually approach or separate; the clamping plates are longitudinally arranged at the bottom of the sliding plate a, and two groups of clamping plates are arranged and are symmetrical about the collecting bag; slide b sets up two sets ofly, and two sets of slide b slide and set up both ends around the splint top, and two sets of slide b are located collection bag front and back both sides respectively, all sets up the hot melt device on the relative terminal surface of two sets of slide b, and the hot melt device is used for carrying out the hot melt to collecting bag top portion and drawing in the position and sealing, is provided with the power component b that drives two sets of slide b and is close to each other or keep away from on the splint.

Preferably, the power assembly a comprises a motor b and a bidirectional screw rod a; motor b sets up on the supporting leg, and motor b's output shaft is connected with two-way screw rod a, and two-way screw rod a passes two sets of slide a that are located the collection bag left and right sides, sets up the screw hole that screw thread opposite direction respectively on two sets of slide a.

Preferably, the power assembly b comprises a motor c and a bidirectional screw b; the motor c is arranged on the clamping plate, an output shaft of the motor c is connected with the two-way screw rod b, the two-way screw rod b penetrates through the two groups of sliding plates b, and threaded holes with opposite thread directions are formed in the two groups of sliding plates b.

On the other hand, the invention provides a paper shredding method of an automatic packaging paper shredder, which comprises the following steps: s1, a user sleeves the top of a collecting bag outside an inner cylinder body and fixes the collecting bag by a bag pressing assembly; s2, putting the paper into a paper shredding mechanism, and after being shredded, dropping the paper into a collecting bag; s3, with the continuous expansion of the collecting bag, when two groups of correlation sensors on the left side and the right side of the collecting bag generate light shielding signals, the collecting bag reaches the set loading capacity; s4, the control system controls the paper shredding mechanism to stop working, and then controls the sealing assembly to perform hot melting sealing on the top of the collecting bag to finish automatic sealing and packaging; and S5, removing the collecting bag filled with shredded paper after the user releases the fixation of the collecting bag through the bag pressing assembly.

Compared with the prior art, the invention has the following beneficial technical effects: will collect bag sack cover on the barrel in, then fix the collection bag through pressing the bag subassembly, paper falls into in the collection bag after smashing through shredded paper mechanism, after correlation sensor detects the collection bag and fills with, shredded paper mechanism stop work, start the seal subassembly and seal collection bag top, accomplish automatic packing work, seal tightly, it is effectual to seal, and the collection bag need not be customized very much, general disposal bag all can use, low in use cost, therefore, the clothes hanger is strong in practicability, the incessant upper and lower vibration of lifter plate of bottom makes the shredded paper in the collection bag distribute inseparabler in addition, the loading capacity of single collection bag is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a top cross-sectional view of FIG. 1;

FIG. 3 is a schematic diagram of an automatic packing assembly;

FIG. 4 is a side view of the automated baling assembly;

fig. 5 is an enlarged schematic view of a point a in fig. 1.

Reference numerals: 1. a paper shredding mechanism; 2. a paper feeding protective cover; 3. a support plate a; 4. supporting legs; 5. a conical shell; 6. an inner cylinder; 7. an outer cylinder; 8. a threaded sleeve; 9. an auxiliary rotation bar; 10. rotating the rod; 11. a support bar; 12. a clamping block; 13. a collection bag; 14. a support plate b; 15. a guide rod a; 16. a lifting plate; 17. a spring; 18. a motor a; 19. a cam; 20. a support plate c; 21. a correlation sensor; 22. a slide plate a; 23. a guide rod b; 24. a motor b; 25. a bidirectional screw a; 26. a splint; 27. a sliding plate b; 28. a motor c; 29. a bidirectional screw b; 30. and (4) a hot melting device.

Detailed Description

Example one

The invention provides an automatic packaging paper shredder, which comprises a paper shredding mechanism 1 and an automatic packaging assembly; the automatic packing assembly comprises a support plate a3, an outer cylinder 7, a collecting bag 13, a support plate b14 and a support plate c20;

as shown in fig. 1-3, a paper shredding mechanism 1 is arranged on a supporting plate a3, a feeding opening at the top of the paper shredding mechanism 1 is vertically provided with a paper feeding protective cover 2, and a discharging end of the paper shredding mechanism 1 is opposite to a round hole on the supporting plate a 3;

as shown in fig. 1, 4 and 5, a plurality of groups of supporting legs 4 are arranged at the bottom of a supporting plate a3, a conical shell 5 is arranged at the bottom of the supporting plate a3, and an inner cylinder 6 is vertically arranged at the bottom of the conical shell 5; the top of the collecting bag 13 is sleeved on the outer wall of the inner cylinder 6; the outer cylinder 7 is vertically arranged on the outer wall of the conical shell 5, the bag pressing assembly is arranged on the outer cylinder 7, and the bag pressing assembly extrudes and sticks the collecting bag 13 to the outer wall of the inner cylinder 6; the supporting plate b14 is horizontally arranged on the plurality of groups of supporting legs 4, and the bottom of the collecting bag 13 is contacted with the supporting plate b 14; four groups of supporting plates c20 are arranged, the four groups of supporting plates c20 are respectively arranged on the four groups of supporting legs 4 and are positioned at the inner sides of the four groups of supporting legs 4, and opposite sensors 21 which are matched with each other are arranged on the two groups of supporting plates c20 which are opposite from front to back; the four groups of supporting legs 4 are provided with sealing components for carrying out hot melting sealing on the collecting bag 13;

as shown in fig. 1 and 4, the lifting device further comprises a guide rod a15, a lifting plate 16, a spring 17, a motor a18 and a cam 19; the guide rod a15 is vertically arranged on the support plate b 14; a plurality of groups of guide holes a for the guide rods a15 to pass through are arranged on the lifting plate 16; the spring 17 is vertically arranged on the supporting plate b14, and the top of the spring 17 is connected with the bottom of the lifting plate 16; the motor a18 is arranged on the supporting plate b14, the output shaft of the motor a18 is connected with a cam shaft, the cam 19 is arranged on the cam shaft, and the cam 19 is contacted with the bottom of the lifting plate 16; the bottom of the collection bag 13 is in contact with a lifting plate 16.

The supporting plate a3 is provided with a control system, the control system is in control connection with the paper shredding mechanism 1, the motor a18 and the sealing assembly, and the control system is electrically connected with the opposite-jet sensor 21.

In this embodiment, overlap the bag mouth of collection bag 13 on interior barrel 6, then fix collection bag 13 through the bag pressing component, paper falls into collection bag 13 after smashing through shredded paper mechanism 1 in, after correlation sensor 21 detects collection bag 13 and fills with, shredded paper mechanism 1 stop work, start the seal subassembly and seal collection bag 13 top, accomplish automatic packing work, it is tight to seal, seal effectually, and collection bag 13 need not specially customize, general disposal bag all can use, use cost is low, therefore, the clothes hanger is strong in practicability, in addition, the incessantly vibration from top to bottom of lifter plate 16 of bottom makes the shredded paper distribution in collection bag 13 inseparabler, improve the load capacity of single collection bag 13.

Example two

As shown in fig. 1 and 5, compared to the first embodiment, the automatic packing shredder according to the present invention comprises a screw sleeve 8, a rotating rod 10, a supporting rod 11 and a clamping block 12; the threaded sleeve 8 is sleeved on the outer cylinder 7, threads which are matched with each other are arranged on the inner wall of the threaded sleeve 8 and the outer wall of the outer cylinder 7, and a plurality of groups of auxiliary rotating strips 9 are arranged on the outer peripheral wall of the threaded sleeve 8; the rotating rod 10 is rotatably arranged at the bottom of the outer cylinder 7; the middle part of the support rod 11 is connected with a rotating rod 10, and the rotating rod 10 is contacted with the outer edge of the bottom of the threaded sleeve 8; the clamping block 12 is arranged at the bottom of the supporting rod 11, and the clamping block 12 extrudes the collecting bag 13 to be attached to the outer wall of the inner cylinder 6; the bag pressing components are arranged in a plurality of groups along the circumferential direction of the outer cylinder body 7.

In this embodiment, need take off on the collection bag 13, it makes its rebound to rotate thread bush 8, thereby clamp splice 12 is rotated to the outside under self action of gravity and is loosened the compressing tightly to collection bag 13, can take off the collection bag 13 after sealing, place new collection bag 13 time with the sack cover on interior barrel 6, then rotatory thread bush 8 makes its rebound, make its rotation through the extrusion to bracing piece 11, thereby make clamp splice 12 press from both sides tight collection bag 13, there is the clearance between adjacent two sets of clamp splices 12, can be used to a section of thick bamboo and collect the gas outgoing in the bag 13.

EXAMPLE III

1-3, compared to the first embodiment, the sealing assembly of the automatic packing shredder of the present invention comprises a sliding plate a22, a guide rod b23, a clamping plate 26 and a sliding plate b27; the guide rods b23 are horizontally arranged on the two groups of left and right opposite supporting legs 4, and the guide rods b23 are positioned above the outer cylinder body 7; the sliding plates a22 are arranged on the guide rods b23 in a transverse sliding manner, four groups of sliding plates a22 are arranged, the supporting legs 4 are provided with power components a for driving the sliding plates a22 on the left side and the right side of the collecting bag 13 to mutually approach or separate, and each power component a comprises a motor b24 and a bidirectional screw a25; the motor b24 is arranged on the supporting leg 4, an output shaft of the motor b24 is connected with a bidirectional screw a25, the bidirectional screw a25 penetrates through two groups of sliding plates a22 positioned at the left side and the right side of the collecting bag 13, and threaded holes with opposite thread directions are respectively arranged on the two groups of sliding plates a 22; the clamping plates 26 are longitudinally arranged at the bottom of the sliding plate a22, two groups of clamping plates 26 are arranged, and the two groups of clamping plates 26 are symmetrical about the collecting bag 13; the two groups of sliding plates b27 are arranged, the two groups of sliding plates b27 are arranged at the front end and the rear end of the top of the clamping plate 26 in a sliding manner, the two groups of sliding plates b27 are respectively positioned at the front side and the rear side of the collection bag 13, the opposite end surfaces of the two groups of sliding plates b27 are respectively provided with a hot melting device 30, the hot melting devices 30 are used for carrying out hot melting sealing on the folded part at the top of the collection bag 13, the clamping plate 26 is provided with a power assembly b for driving the two groups of sliding plates b27 to mutually approach or keep away, and the power assembly b comprises a motor c28 and a two-way screw b29; the motor c28 is arranged on the clamping plate 26, an output shaft of the motor c28 is connected with a bidirectional screw b29, the bidirectional screw b29 penetrates through the two groups of sliding plates b27, and threaded holes with opposite thread directions are formed in the two groups of sliding plates b 27.

In this embodiment, after correlation sensor 21 detects collection bag 13 and fills up, shredded paper mechanism 1 stop work, motor b24 starts to drive two sets of slide a22 and removes, will collect bag 13 top and draw in to the centre through controlling two sets of splint 26, then motor c28 on splint 26 starts to further draw in collection bag 13 top through two sets of slide b27, and the sack that will draw in after last hot melt device 30 will carry out the hot melt and seal, accomplishes the automatic packing of sealing.

Example four

The paper shredding method based on the automatic packaging paper shredder comprises the following steps:

s1, a user sleeves the top of a collecting bag 13 outside an inner cylinder body 6 and fixes the collecting bag 13 by a bag pressing assembly;

s2, putting the paper into the paper shredding mechanism 1, and after being shredded, dropping the paper into a collection bag 13;

s3, with the continuous expansion of the collecting bag 13, when the two groups of correlation sensors 21 on the left side and the right side of the collecting bag 13 generate light shielding signals, the collecting bag 13 reaches the set loading capacity;

s4, the control system controls the paper shredding mechanism 1 to stop working, and then controls the sealing assembly to perform hot melting sealing on the top of the collecting bag 13 to finish automatic sealing and packaging;

and S5, the user releases the fixation of the collecting bag 13 through the bag pressing component and then takes down the collecting bag 13 filled with shredded paper.

In this embodiment, overlap the bag mouth of collection bag 13 on interior barrel 6, then fix collection bag 13 through the bag pressing component, paper falls into collection bag 13 after smashing through shredded paper mechanism 1 in, after correlation sensor 21 detects collection bag 13 and fills with, shredded paper mechanism 1 stop work, start the seal subassembly and seal collection bag 13 top, accomplish automatic packing work, it is tight to seal, seal effectually, and collection bag 13 need not specially ordered, general disposal bag all can use, low in use cost, therefore, the clothes hanger is strong in practicability.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. An automatic packaging paper shredder is characterized by comprising a paper shredding mechanism (1) and an automatic packaging component; the automatic packing assembly comprises a support plate a (3), an outer cylinder (7), a collecting bag (13), a support plate b (14) and a support plate c (20); the paper shredding mechanism (1) is arranged on the supporting plate a (3), a paper feeding protective cover (2) is vertically arranged at a feeding port at the top of the paper shredding mechanism (1), and a discharging end of the paper shredding mechanism (1) is opposite to a round hole in the supporting plate a (3); a plurality of groups of supporting legs (4) are arranged at the bottom of the supporting plate a (3), a conical shell (5) is arranged at the bottom of the supporting plate a (3), and an inner cylinder body (6) is vertically arranged at the bottom of the conical shell (5); the top of the collecting bag (13) is sleeved on the outer wall of the inner cylinder (6); the outer cylinder (7) is vertically arranged on the outer wall of the conical shell (5), the outer cylinder (7) is provided with a bag pressing assembly, and the bag pressing assembly extrudes the collecting bag (13) to be attached to the outer wall of the inner cylinder (6); the supporting plate b (14) is horizontally arranged on a plurality of groups of supporting legs (4), and the bottom of the collecting bag (13) is contacted with the supporting plate b (14); the four groups of supporting plates c (20) are arranged, the four groups of supporting plates c (20) are respectively arranged on the four groups of supporting legs (4) and are positioned at the inner sides of the four groups of supporting legs (4), and the two groups of supporting plates c (20) which are opposite from each other in the front-back direction are provided with correlation sensors (21) which are matched with each other; the four groups of supporting legs (4) are provided with sealing components for carrying out hot melting sealing on the collecting bag (13);

the supporting plate a (3) is provided with a control system, the control system is in control connection with the paper shredding mechanism (1) and the sealing assembly, and the control system is electrically connected with the correlation sensor (21).

2. The automatic bagging shredder according to claim 1, wherein the bag pressing assembly comprises a threaded sleeve (8), a rotating rod (10), a supporting rod (11) and a clamping block (12); the threaded sleeve (8) is sleeved on the outer cylinder body (7), and threads which are matched with each other are arranged on the inner wall of the threaded sleeve (8) and the outer wall of the outer cylinder body (7); the rotating rod (10) is rotatably arranged at the bottom of the outer cylinder body (7); the middle part of the supporting rod (11) is connected with the rotating rod (10), and the rotating rod (10) is contacted with the outer edge of the bottom of the threaded sleeve (8); the clamping block (12) is arranged at the bottom of the supporting rod (11), and the clamping block (12) extrudes the collecting bag (13) to be attached to the outer wall of the inner cylinder body (6); the bag pressing components are arranged in a plurality of groups along the circumferential direction of the outer cylinder body (7).

3. The automatic packaging shredder according to claim 2, wherein the peripheral wall of the threaded sleeve (8) is provided with a plurality of sets of auxiliary rotating strips (9).

4. The automatic packing shredder according to claim 1, further comprising a guide bar a (15), a lifting plate (16), a spring (17), a motor a (18) and a cam (19); the guide rod a (15) is vertically arranged on the support plate b (14); a plurality of groups of guide holes a for the guide rods a (15) to pass through are arranged on the lifting plate (16); the spring (17) is vertically arranged on the supporting plate b (14), and the top of the spring (17) is connected with the bottom of the lifting plate (16); the motor a (18) is arranged on the supporting plate b (14), an output shaft of the motor a (18) is connected with a cam shaft, the cam (19) is arranged on the cam shaft, and the cam (19) is contacted with the bottom of the lifting plate (16); the bottom of the collecting bag (13) is contacted with a lifting plate (16).

5. The automatic bagging shredder of claim 1, wherein the closure assembly comprises a slide a (22), a guide bar b (23), a clamp plate (26), and a slide b (27); the guide rods b (23) are horizontally arranged on the left and right two groups of opposite supporting legs (4), and the guide rods b (23) are positioned above the outer cylinder body (7); the sliding plates a (22) are arranged on the guide rods b (23) in a transverse sliding manner, the sliding plates a (22) are arranged in four groups, and the supporting legs (4) are provided with power components a for driving the sliding plates a (22) on the left side and the right side of the collecting bag (13) to mutually approach or separate; the clamping plates (26) are longitudinally arranged at the bottom of the sliding plate a (22), two groups of clamping plates (26) are arranged, and the two groups of clamping plates (26) are symmetrical about the collecting bag (13); slide b (27) set up two sets ofly, both ends around splint (26) top are slided to two sets of slides b (27) and set up, both sides around collection bag (13) are located respectively in two sets of slides b (27), all set up hot melt device (30) on two sets of slides b (27) relative terminal surfaces, hot melt device (30) are used for drawing in the position to collection bag (13) top and carry out the hot melt and seal, be provided with the power component b that drives two sets of slides b (27) and be close to each other or keep away from on splint (26).

6. The automatic bagging shredder according to claim 5, wherein the power assembly a comprises a motor b (24) and a two-way screw a (25); motor b (24) set up on supporting leg (4), and the output shaft and the two-way screw rod a (25) of motor b (24) are connected, and two-way screw rod a (25) pass two sets of slide a (22) that are located collection bag (13) left and right sides, set up the screw hole that the screw thread direction is opposite on two sets of slide a (22) respectively.

7. The automatic bagging shredder according to claim 5, wherein the power assembly b comprises a motor c (28) and a two-way screw b (29); the motor c (28) is arranged on the clamping plate (26), an output shaft of the motor c (28) is connected with the two-way screw b (29), the two-way screw b (29) penetrates through the two groups of sliding plates b (27), and threaded holes with opposite thread directions are formed in the two groups of sliding plates b (27).

8. The automatic packaging shredder according to claim 1, wherein the shredding method of the shredder comprises the steps of: s1, a user sleeves the top of a collecting bag (13) outside an inner cylinder body (6) and fixes the collecting bag (13) by a bag pressing assembly; s2, putting the paper into the paper shredding mechanism (1), and crushing the paper and then dropping the crushed paper into a collecting bag (13); s3, with the continuous expansion of the collecting bag (13), when two groups of correlation sensors (21) on the left side and the right side of the collecting bag (13) generate light shielding signals, the collecting bag (13) is indicated to reach the set loading capacity; s4, the control system controls the paper shredding mechanism (1) to stop working, and then controls the sealing assembly to perform hot melting sealing on the top of the collecting bag (13) to finish automatic sealing and packaging; s5, the user releases the fixation of the collecting bag (13) through the bag pressing component and then takes down the collecting bag (13) filled with shredded paper.