阅读说明：本技术 一种门缝收信装置及其使用方法 (Door seam receiving device and using method thereof ) 是由 沈兴华 于 2020-08-14 设计创作，主要内容包括：本发明提供一种门缝收信装置及其使用方法,涉及信件收取领域,包括外壳,所述外壳的一侧底部固定连接有收信开口,所述收信开口的高度不大于门缝的高度,所述外壳内设置有升降箱,所述升降箱设置为前后开口的箱体,所述升降箱的两侧对称固定连接有两个铜套,每个铜套内均丝杠配合有丝杆,所述丝杆为竖直设置,所述丝杆的底端与外壳铰接,且丝杆的顶端贯穿外壳的顶部且固定连接有第一齿轮。该门缝收信装置,当公司无人时邮递员也能通过将信封从收信开口中一一送入,然后信封便会集中收集在第一储信袋和第二储信袋中,这样当公司员工回来时直接从第一储信袋和第二储信袋中取出信件即可,非常方便。(The invention provides a door seam letter receiving device and a using method thereof, and relates to the field of letter collection. When no person is in the door slot letter receiving device, a postman can feed the envelopes into the letter receiving opening one by one, and then the envelopes are collected in the first letter storage bag and the second letter storage bag in a centralized manner, so that letters can be taken out from the first letter storage bag and the second letter storage bag directly when the staff of the company returns, and the door slot letter receiving device is very convenient.)

1. A door crack receiving arrangement, includes shell (1), its characterized in that: the bottom of one side of the shell (1) is fixedly connected with a receiving opening (3), the height of the receiving opening (3) is not more than the height of the door gap, a lifting box (18) is arranged in the shell (1), the lifting box (18) is a box body with front and back openings, two copper sleeves (17) are symmetrically and fixedly connected with two sides of the lifting box (18), a screw rod (6) is matched with each copper sleeve (17), the screw rod (6) is vertically arranged, the bottom end of the screw rod (6) is hinged with the shell, the top end of the screw rod (6) penetrates through the top of the shell (1) and is fixedly connected with a first gear (7), the top of the shell (1) is fixedly connected with a first motor (10), the top of the first motor (10) is fixedly connected with a second gear (9), the first gear (7) and the second gear (9) are in external transmission connection with a first transmission belt (8);

the bottom of the inner cavity of the lifting box (18) is provided with a letter receiving plate (13), the length of the letter receiving plate (13) is matched with the letter receiving opening (3), the top surface of the letter receiving plate (13) is obliquely arranged, the oblique direction inclines from one end of the length direction of the letter receiving plate (13) to the other end, one side of the letter receiving plate (13) far away from the letter receiving opening (3) is fixedly connected with a first rotating shaft (26), the letter receiving plate (13) is hinged with the side wall of the lifting box (18) through the first rotating shaft (26), the bottom of one side of the letter receiving plate (13) close to the letter receiving opening (3) is provided with two accommodating grooves (27), and the two accommodating grooves (27) are symmetrically arranged on two sides of the letter receiving plate (13) respectively;

a rotating rod (28) is arranged in the accommodating groove (27), one end of the rotating rod (28) is fixedly connected with a second rotating shaft (29), the second rotating shaft (29) is hinged with the side wall of the lifting box (18), one end, far away from the rotating rod (28), of the second rotating shaft (29) penetrates through the lifting box (18) and is fixedly connected with a third gear (14), the top of the lifting box (18) is hinged with a third rotating shaft (23), both ends of the third rotating shaft (23) are fixedly connected with a fourth gear (16), the outer parts of the third gear (14) and the fourth gear (16) are in transmission connection with a second transmission belt (15), the top of the lifting box (18) is fixedly connected with a second motor (12), the second motor (12) is in linkage connection with the third rotating shaft (23), a first letter outlet (19) and a second letter outlet (20) are formed in the shell (1) and located on one side, far away from the letter receiving opening (3), of the shell (1), the first letter outlet (19) and the second letter outlet (20) are obliquely arranged, the oblique angle is the same as the oblique angle of the letter receiving plate (13), the length of the first letter outlet (19) is smaller than that of the second letter outlet (20), the lower ends of the first letter outlet (19) and the second letter outlet (20) are vertically aligned with the lower end of the letter receiving plate (13), and the first letter outlet (19) is located below the second letter outlet (20);

one side of the first letter outlet (19) is detachably connected with a first letter storage bag (4), one side of the second letter outlet (20) is detachably connected with a second letter storage bag (5), a pressure sensor (21) is inlaid on the letter receiving plate (13), a PLC (programmable logic controller) controller (11) is fixedly connected to the shell (1), and the PLC controller (11) is electrically connected with the pressure sensor (21), the first motor (10) and the second motor (12) respectively.

2. A door seam receiving device as defined in claim 1, wherein: the inside of the letter receiving opening (3) is provided with a cushion block (2), the cross section of the cushion block (2) is the same as that of the letter receiving plate (13), and the bottom of the cushion block (2) is fixedly connected with the letter receiving opening (3).

3. A door seam receiving device as defined in claim 1, wherein: a fifth gear (25) is fixedly connected to an output shaft of the second motor (12), a sixth gear (22) is fixedly connected to the middle of the third rotating shaft (23), and a third transmission belt (24) is connected between the fifth gear (25) and the sixth gear (22) in a transmission manner.

4. A door seam receiving device as defined in claim 1, wherein: the heights of the first letter outlet (19) and the second letter outlet (20) are both larger than three centimeters.

5. A door seam receiving device as defined in claim 1, wherein: the first motor (10) is fixedly connected to the center of the top of the shell (1), and the PLC (11) is fixedly connected to the top of the shell (1).

6. A door seam receiving device as defined in claim 1, wherein: the pressure sensor (21) is arranged on the lower side of the letter receiving plate (13).

7. A door seam receiving device as defined in claim 1, wherein: and a layer of smooth film is arranged on the top of the letter receiving plate (13) and the pressure sensor (21).

8. A method of using a door crack receiving device according to any one of claims 1 to 7, characterized in that: it comprises the following steps:

the method comprises the following steps: before going out, the shell (1) is placed on the back of the upper door closure, the signal receiving opening (3) extends out of a door seam below the bottom of the door, the door is opened, after people go out, the door closure is locked, and then a user can go out safely;

step two: when a postman sends letters, an envelope is transversely pushed onto a letter receiving plate (13) from a letter receiving opening (3) in a door seam, the letter receiving plate (13) is obliquely arranged, so that the envelope can slide towards the lower part of the letter receiving plate (13) under the action of gravity, meanwhile, a pressure sensor (21) is triggered by the pressure of the envelope to transmit a signal to a PLC (programmable logic controller) (11), the PLC (11) controls a first motor (10) to rotate in the forward direction, the first motor (10) drives two second gears (9) on an output shaft of the first motor to rotate, the two second gears (9) respectively drive two first gears (7) to rotate through a first transmission belt (8), the two first gears (7) drive two screw rods (6) to rotate, and the two screw rods (6) enable two copper sleeves (17) to drive a lifting box (18) to move upwards;

step three: when the upper surface of the letter receiving plate (13) is level with the lower surface of the first letter outlet (19), the first motor (10) is stopped, the second motor (12) is started, the second motor (12) drives the third rotating shaft (23) to rotate, the third rotating shaft (23) drives the two fourth gears (16) at the two ends of the third rotating shaft to rotate, the two fourth gears (16) drive the two third gears (14) to rotate through the second transmission belt (15), the two third gears (14) drive the horizontal rotating rod (28) to rotate for ninety degrees to be erected, and the other end of the letter receiving plate (13) is hinged with the rotating box through the first rotating shaft (26), so that one side of the letter receiving plate (13) with the rotating rod (28) is jacked up due to the erection of the rotating rod (28), the second motor (12) rotates reversely, the letter receiving plate (13) resets, when one end of the first letter receiving plate (13) is jacked up, the envelopes on the letter receiving plate (13) slide towards the first letter outlet (19) due to gravity, if the envelope is a small envelope, the envelope enters the first envelope storage bag (4) from the first envelope outlet (19), and if the envelope is a large envelope, the envelope cannot enter the first envelope storage bag (4) because the length of the envelope is larger than that of the first envelope outlet (19);

step four: when the first motor (10) is started, the first motor (10) rotates forwards, the lifting box (18) rises, when the upper surface of the letter receiving plate (13) is level with the lower surface of the second letter outlet (20), the first motor (10) is stopped, the second motor (12) is started, the second motor (12) drives one end of the letter receiving plate (13) to jack up, then the second motor (12) rotates backwards, the letter receiving plate (13) resets, when one end of the second letter receiving plate (13) jacks up, the small envelope does not move on the letter receiving plate (13), the large envelope slides towards the second letter outlet (20), and the length of the second letter outlet (20) is larger than that of the first letter outlet (19), so that the large envelope enters the second letter storage bag (5) from the second letter outlet (20);

step five: the first motor (10) rotates reversely, the lifting box (18) can descend until reset, one time of work is completed, then a postman can put the next envelope into the letter receiving opening (3), and the steps are repeated until all letters are dispatched;

step six: when the person returns, the first letter storage bag (4) and the second letter storage bag (5) are taken down, the small envelope is taken out of the first letter storage bag (4), the large envelope is taken out of the second letter storage bag (5), and letter collection is completed.

Technical Field

The invention relates to the technical field of letter collection, in particular to a door seam receiving device and a using method thereof.

Background

In some companies built in office buildings, it is often necessary to receive multiple letter documents due to business needs. Once express delivery personnel close at the unmanned gate of a company when delivering letters on weekends, certificate files in letters are important and cannot be directly placed outside the door, and in order to ensure the safety of a building, building management personnel often do not allow the company in the building to occupy a public channel, so that the company cannot independently set a mailbox outside the door. The courier has to send these letters into the company along with the large door opening.

However, the large letter can be scattered on the ground when a person in Monday company opens a door when working, and the large letter envelopes and the small letter envelopes are mixed together, so that the letter is very messy and is not easy to sort, and the sorting takes a lot of time and affects the efficiency.

Disclosure of Invention

Technical problem to be solved

The invention provides a door slot receiving device capable of receiving letters from a door slot and a using method thereof, aiming at the defects of the prior art, and solving the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a door seam receiving device comprises a shell, wherein a receiving opening is fixedly connected to the bottom of one side of the shell, the height of the receiving opening is not larger than that of a door seam, a lifting box is arranged in the shell and is arranged as a box body with front and rear openings, two copper sleeves are symmetrically and fixedly connected to two sides of the lifting box, a lead screw is matched in each copper sleeve, the lead screw is vertically arranged, the bottom end of the lead screw is hinged to the shell, the top end of the lead screw penetrates through the top of the shell and is fixedly connected with a first gear, a first motor is fixedly connected to the top of the shell, a second gear is fixedly connected to the top of the first motor, and a first transmission belt is in transmission connection with the outer parts of the first gear and the second gear;

the bottom of the inner cavity of the lifting box is provided with a letter receiving plate, the length of the letter receiving plate is matched with that of the letter receiving opening, the top surface of the letter receiving plate is arranged in an inclined mode, the inclined direction inclines from one end of the length direction of the letter receiving plate to the other end of the length direction of the letter receiving plate, one side, far away from the letter receiving opening, of the letter receiving plate is fixedly connected with a first rotating shaft, the letter receiving plate is hinged to the side wall of the lifting box through the first rotating shaft, the bottom, close to the letter receiving opening, of one side of the letter receiving plate is provided with two accommodating grooves, and the two accommodating grooves are symmetrically arranged on;

a rotating rod is arranged in the accommodating groove, one end of the rotating rod is fixedly connected with a second rotating shaft, the second rotating shaft is hinged with the side wall of the lifting box, one end of the second rotating shaft, which is far away from the rotating rod, penetrates through the lifting box and is fixedly connected with a third gear, the top of the lifting box is hinged with a third rotating shaft, two ends of the third rotating shaft are both fixedly connected with a fourth gear, the outer parts of the third gear and the fourth gear are in transmission connection with a second transmission belt, the top of the lifting box is fixedly connected with a second motor, the second motor is in linkage connection with the third rotating shaft, a first letter outlet and a second letter outlet are arranged on the shell and positioned on one side of the shell, which is far away from the letter receiving opening, the first letter outlet and the second letter outlet are both obliquely arranged, the oblique angle is the same as the oblique angle of the letter receiving plate, and the length of the first letter outlet is smaller than that of the second letter outlet, the lower ends of the first letter outlet and the second letter outlet are vertically aligned with the lower end of the letter receiving plate, and the first letter outlet is positioned below the second letter outlet;

one side of the first letter outlet is detachably connected with a first letter storage bag, one side of the second letter outlet is detachably connected with a second letter storage bag, a pressure sensor is embedded in the letter receiving plate, and the shell is fixedly connected with a PLC (programmable logic controller) which is electrically connected with the pressure sensor, the first motor and the second motor respectively.

Preferably, a cushion block is arranged inside the letter receiving opening, the cross section of the cushion block is the same as that of the letter receiving plate, and the bottom of the cushion block is fixedly connected with the letter receiving opening.

Preferably, an output shaft of the second motor is fixedly connected with a fifth gear, a middle part of the third rotating shaft is fixedly connected with a sixth gear, and a third transmission belt is in transmission connection between the fifth gear and the sixth gear.

Preferably, the height of the first letter outlet and the height of the second letter outlet are both larger than three centimeters.

Preferably, the first motor is fixedly connected to the center of the top of the housing, and the PLC controller is fixedly connected to the top of the housing.

Preferably, the pressure sensor is arranged on the side of the lower height of the receiving plate.

And a layer of smooth film is arranged on the top of the letter receiving plate and the top of the pressure sensor.

The use method of the door slot receiving device comprises the following steps:

the method comprises the following steps: before going out, the shell is placed on the back of the upper door closure, the receiving opening extends out of a door seam below the bottom of the door, the door is opened, and after people go out, the door closure is locked, and then a user can go out safely;

step two: when a postman sends letters, an envelope is transversely pushed onto a letter receiving plate from a letter receiving opening in a door seam, the letter receiving plate is obliquely arranged, so that the envelope can slide to the lower part of the letter receiving plate under the action of gravity, meanwhile, a pressure sensor is triggered by the pressure of the envelope to transmit a signal to a PLC (programmable logic controller), the PLC controls a first motor to rotate in the forward direction, the first motor drives two second gears on an output shaft of the first motor to rotate, the two second gears drive two first gears to rotate through first transmission belts respectively, the two first gears drive two screw rods to rotate, and the two screw rods rotate to enable two copper sleeves to drive a lifting box to move upwards;

step three: when the upper surface of the letter receiving plate is level with the lower surface of the first letter outlet, the first motor is stopped, the second motor is started, the second motor drives the third rotating shaft to rotate, the third rotating shaft drives the two fourth gears at the two ends of the third rotating shaft to rotate, the two fourth gears drive the two third gears to rotate through the second transmission belt, the two third gears drive the horizontal rotating rod to rotate for ninety degrees to erect, and because the other end of the letter receiving plate is hinged with the rotary box through the first rotary shaft, one side of the letter receiving plate with the rotary rod can be jacked up due to the erection of the rotary rod, the second motor rotates reversely, the letter receiving plate is reset, when one end of the first letter receiving plate is jacked up, the envelope on the letter receiving plate slides to the first letter outlet due to gravity, if the envelope is a small envelope, the envelope can enter the first envelope storage bag from the first envelope outlet, and if the envelope is a large envelope, the envelope cannot enter the first envelope storage bag because the length of the envelope is greater than that of the first envelope outlet;

step four: when the upper surface of the letter receiving plate is level with the lower surface of the second letter outlet, the first motor is stopped, the second motor is started, the second motor drives one end of the letter receiving plate to jack up, then the second motor rotates reversely, the letter receiving plate resets, when one end of the second letter receiving plate jacks up, the small envelope does not slip on the letter receiving plate, the large envelope slides towards the second letter outlet, the length of the second letter outlet is larger than that of the first letter outlet, and therefore the large envelope enters the second letter storage bag from the second letter outlet;

step five: the first motor rotates reversely, the lifting box can descend until reset, one-time work is completed, then a postman can put the next envelope into the letter receiving opening, and the steps are repeated until all letters are dispatched;

step six: and when the person returns, the first letter storage bag and the second letter storage bag are taken down, the small envelope is taken out of the first letter storage bag, the large envelope is taken out of the second letter storage bag, and the letter collection is completed.

(III) advantageous effects

The invention provides a door seam receiving device and a using method thereof. The method has the following beneficial effects:

1. when no person is in the door slot letter receiving device, a postman can feed the envelopes into the letter receiving opening one by one, and then the envelopes are collected in the first letter storage bag and the second letter storage bag in a centralized manner, so that letters can be taken out from the first letter storage bag and the second letter storage bag directly when the staff of the company returns, and the door slot letter receiving device is very convenient.

2. This door seam collection of mail device can collect little envelope in first letter bag, collects big envelope in second letter bag, can separately collect big envelope and little envelope, the degree of difficulty that reduces the personnel's of company's arrangement that can be great, the efficiency of great improvement arrangement.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a perspective view of the internal structure of the present invention;

FIG. 3 is a front view of the structure of the present invention;

FIG. 4 is a rear sectional view of the structure of the present invention;

FIG. 5 is a side cross-sectional view of the structure of the present invention;

FIG. 6 is a perspective view of the lift cage construction of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at A in accordance with the present invention;

FIG. 8 is a side sectional view of the lift cage of the present invention;

FIG. 9 is a side sectional view of the elevator car of the present invention.

In the figure: the automatic letter receiving machine comprises a shell 1, a cushion block 2, a letter receiving opening 3, a first letter storage bag 4, a second letter storage bag 5, a lead screw 6, a first gear 7, a first transmission belt 8, a second gear 9, a first motor 10, a PLC (programmable logic controller) 11, a second motor 12, a letter receiving plate 13, a third gear 14, a second transmission belt 15, a fourth gear 16, a copper sleeve 17, a lifting box 18, a first letter outlet 19, a second letter outlet 20, a pressure sensor 21, a sixth gear 22, a third rotating shaft 23, a third transmission belt 24, a fifth gear 25, a first rotating shaft 26, an accommodating groove 27, a rotating rod 28 and a second rotating shaft 29.

Detailed Description

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

The embodiment of the invention provides a door seam receiving device, as shown in fig. 1-9, which comprises a shell 1, wherein a receiving opening 3 is fixedly connected to the bottom of one side of the shell 1, the height of the receiving opening 3 is not more than that of a door seam, a lifting box 18 is arranged in the shell 1, the lifting box 18 is arranged into a box body with front and back openings, two copper sleeves 17 are symmetrically and fixedly connected to two sides of the lifting box 18, a lead screw 6 is matched with a lead screw in each copper sleeve 17, the lead screw 6 is vertically arranged, the bottom end of the lead screw 6 is hinged with the shell, the top end of the lead screw 6 penetrates through the top of the shell 1 and is fixedly connected with a first gear 7, a first motor 10 is fixedly connected to the top of the shell 1, a second gear 9 is fixedly connected to the top of the first motor 10, and a first transmission belt 8 is in external;

the bottom of the inner cavity of the lifting box 18 is provided with a letter receiving plate 13, the length of the letter receiving plate 13 is matched with the letter receiving opening 3, the top surface of the letter receiving plate 13 is obliquely arranged, the oblique direction inclines from one end of the length direction of the letter receiving plate 13 to the other end direction, one side of the letter receiving plate 13 far away from the letter receiving opening 3 is fixedly connected with a first rotating shaft 26, the letter receiving plate 13 is hinged with the side wall of the lifting box 18 through the first rotating shaft 26, the bottom of one side of the letter receiving plate 13 close to the letter receiving opening 3 is provided with two accommodating grooves 27, the two accommodating grooves 27 are respectively and symmetrically arranged at two sides of the letter receiving plate 13, a rotating rod 28 is arranged in the accommodating groove 27, one end of the rotating rod 28 is fixedly connected with a second rotating shaft 29, the second rotating shaft 29 is hinged with the side wall of the lifting box 18, one end of the second rotating shaft 29 far away from the rotating rod 28 penetrates, a fourth gear 16 is fixedly connected to both ends of a third rotating shaft 23, a second transmission belt 15 is connected to the outer portions of the third gear 14 and the fourth gear 16 in a transmission manner, a second motor 12 is fixedly connected to the top of the lifting box 18, the second motor 12 is in linkage connection with the third rotating shaft 23, a first letter outlet 19 and a second letter outlet 20 are formed in the shell 1 and located on one side, far away from the letter receiving opening 3, of the shell 1, the first letter outlet 19 and the second letter outlet 20 are obliquely arranged and have the same inclined angle with the letter receiving plate 13, the length of the first letter outlet 19 is smaller than that of the second letter outlet 20, the lower end of the first letter outlet 19 and the lower end of the second letter outlet 20 are vertically aligned with the lower end of the letter receiving plate 13, the first letter outlet 19 is located below the second letter outlet 20, a first letter storage bag 4 is detachably connected to one side of the first letter outlet 19, a second letter storage bag 5 is detachably connected to one side of the second letter outlet 20, the letter receiving plate 13 is embedded with a pressure sensor 21, the shell 1 is fixedly connected with a PLC (programmable logic controller) 11, and the PLC 11 is electrically connected with the pressure sensor 21, the first motor 10 and the second motor 12 respectively.

When no person is in the company, the postman can feed the envelopes into the receiving opening 3 one by one, and then the envelopes are collected in the first letter storage bag 4 and the second letter storage bag 5 in a centralized manner, so that letters can be taken out from the first letter storage bag 4 and the second letter storage bag 5 directly when the staff of the company returns, and the convenience is high.

Can collect little envelope in first storing up letter bag 4, collect big envelope in second stores up letter bag 5, can separately collect big envelope and little envelope, the degree of difficulty that reduces the personnel's of company's arrangement that can be great, the efficiency of great improvement arrangement.

The inside of the letter receiving opening 3 is provided with a cushion block 2, the cross section shape of the cushion block 2 is the same as that of the letter receiving plate 13, and the bottom of the cushion block 2 is fixedly connected with the letter receiving opening 3. The spacer 2 is arranged so that the mailer will not jam the bottom of the lift box 18 when it jams a letter in.

A fifth gear 25 is fixedly connected to an output shaft of the second motor 12, a sixth gear 22 is fixedly connected to the middle of the third rotating shaft 23, and a third transmission belt 24 is connected between the fifth gear 25 and the sixth gear 22 in a transmission manner.

The height of the first outlet 19 and the second outlet 20 is more than three centimeters. The envelopes can be ensured to smoothly enter the first letter storage bag 4 and the second letter storage bag 5.

The first motor 10 is fixedly connected to the center of the top of the housing 1, and the PLC controller 11 is fixedly connected to the top of the housing 1.

The pressure sensor 21 is disposed on the lower side of the receiving plate 13.

The top of the letter-receiving plate 13 and the pressure sensor 21 is provided with a smooth membrane. The envelope can be made to slide more smoothly on the letter receiving plate 13.

The use method of the door slot receiving device comprises the following steps:

the method comprises the following steps: before going out, the shell 1 is placed on the back of the upper door closure, the signal receiving opening 3 extends out of a door seam below the bottom of the door, the door is opened, and after people go out, the door closure is locked, and then a user can go out safely;

step two: when a postman sends a letter, an envelope is transversely pushed into the letter receiving plate 13 from the letter receiving opening 3 in the door seam, the envelope slides to the lower part of the letter receiving plate 13 under the action of gravity because the letter receiving plate 13 is obliquely arranged, meanwhile, the pressure sensor 21 is triggered by the pressure of the envelope to transmit a signal to the PLC (programmable logic controller) 11, the PLC 11 controls the first motor 10 to rotate in the forward direction, the first motor 10 drives the two second gears 9 on the output shaft of the first motor to rotate, the two second gears 9 respectively drive the two first gears 7 to rotate through the first transmission belt 8, the two first gears 7 drive the two screw rods 6 to rotate, and the two screw rods 6 rotate to drive the two copper sleeves 17 to drive the lifting box 18 to move upwards;

step three: when the upper surface of the letter receiving plate 13 is level with the lower surface of the first letter outlet 19, the first motor 10 is stopped, the second motor 12 is started, the second motor 12 drives the third rotating shaft 23 to rotate, the third rotating shaft 23 drives the two fourth gears 16 at the two ends to rotate, the two fourth gears 16 drive the two third gears 14 to rotate through the second driving belt 15, the two third gears 14 drive the horizontal rotating rod 28 to rotate for ninety degrees to erect, and the other end of the letter receiving plate 13 is hinged with the rotating box through the first rotating shaft 26, so that the side of the letter receiving plate 13 with the rotating rod 28 is jacked up due to the erection of the rotating rod 28, the second motor 12 rotates reversely, the letter receiving plate 13 resets, when one end of the first letter receiving plate 13 is jacked up, the envelope on the letter receiving plate 13 slides to the first letter outlet 19 due to gravity, if the envelope is small, the envelope enters the first letter storage bag 4 from the first letter outlet 19, if the envelope is a large envelope, the envelope cannot enter the first envelope storage bag 4 because the length of the envelope is greater than that of the first envelope outlet 19;

step four: when the first motor 10 is started, the first motor 10 rotates forwards, the lifting box 18 ascends, when the upper surface of the letter receiving plate 13 is level with the lower surface of the second letter outlet 20, the first motor 10 is stopped, the second motor 12 is started, the second motor 12 drives one end of the letter receiving plate 13 to jack up, then the second motor 12 rotates backwards, the letter receiving plate 13 resets, when one end of the second letter receiving plate 13 jacks up, the small envelope does not retract on the letter receiving plate 13 any more, the large envelope slides to the second letter outlet 20, the length of the second letter outlet 20 is larger than that of the first letter outlet 19, and therefore the large envelope enters the second letter storage bag 5 from the second letter outlet 20;

step five: the first motor 10 rotates reversely, the lifting box 18 descends until reset, one time of work is completed, then a postman can put the next envelope into the letter receiving opening 3, the steps are repeated until all letters are dispatched, and the steps are simply programmed and controlled by the PLC 11;

step six: when the person returns, the first letter storage bag 4 and the second letter storage bag 5 are taken down, the small envelope is taken out of the first letter storage bag 4, the large envelope is taken out of the second letter storage bag 5, and letter collection is completed.