Automatic mail filling and bagging equipment

Abstract

The invention provides an automatic mail filling and bagging device which comprises a material conveying mechanism, a filling mechanism, a sealing mechanism and a quality inspection mechanism, the automatic mail filling and bagging device integrates filling, bagging, sheet pasting and sorting (quality inspection) on one assembly line, the sealing mechanism is designed in a targeted mode according to envelope type file pockets for containing files, and the quality inspection mechanism is designed in a targeted mode. The sealing mechanism comprises the bending box, the mail bags are sealed in the conveying process of the conveying belt through the special shape of the bending part of the bending box, the structure is simple and practical, the packaging efficiency is high, finally, classification is achieved through cooperation of the quality inspection camera and the roller assembly, the labor cost is greatly saved, and the filling and bag sealing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of automatic document filling and sealing, in particular to an automatic mail filling and bag sealing device. Background Art

[0002] With the rapid development of the logistics industry, large-scale envelope mailings are increasing. Sending documents or certificates by letter is one of the common methods used by many companies, schools and government agencies.

[0003] Generally, documents or certificates are manually put into envelopes and sealed, and then a courier slip is attached to the surface of the envelope and sent out through logistics. With the development of e-commerce, automatic courier slip affixing equipment has become more common in the prior art, but automatic filling and bag sealing equipment for documents or certificates is still rare. When a large number of documents need to be sent out, manual filling is inefficient and very cumbersome, and it is easy to make mistakes when humans repeat the same work for a long time.

[0004] Therefore, the applicant has designed a device that can automatically fill, seal, label and sort, so as to realize assembly line packaging of documents or certificates. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide an automatic mail filling and sealing device. The technical solution adopted by the present invention is as follows:

[0006] A mail automatic filling and sealing device, comprising the following mechanisms:

[0007] A material transport mechanism, comprising a material box and a transport mechanism, wherein the transport mechanism transports the mail bag in the material box to the first conveyor belt;

[0008] The filling mechanism includes a first conveyor belt, a filling unit, and a glue dripping unit. The mail bag is transported to the filling unit by the first conveyor belt. The filling unit pushes the document or certificate into the mail bag, and the glue dripping unit applies glue to the sealing surface of the mail bag.

[0009] The sealing mechanism includes a second conveyor belt and a bending box. The second conveyor belt drives the mail bag to move relative to the bending box, so that the sealing tongue of the mail bag is folded upward relative to the mail bag body and then folded inward and downward to adhere to the mail bag body under the guidance of the curved part of the bending box, and the label is attached by the label attaching machine;

[0010] The quality inspection mechanism includes a third conveyor belt, a scanning component, and roller components arranged on both sides of the third conveyor belt. The scanning component scans and inspects the mail bag, and the roller components on both sides drive the mail bag to move to a qualified storage box or a rework box according to the scanning result of the scanning component.

[0011] Preferably, a material pallet is provided in the material box, and the material pallet is driven by an electronic slider to move in the material box to transport the mail bag to a transport mechanism, and the transport mechanism includes a first adsorption component and a second limiting slide rail. The first adsorption component sucks up the mail bag on the material pallet and then moves along the second limiting slide rail to the conveying platform and then transports it to the first conveyor belt.

[0012] Preferably, the material box further comprises a first limiting slide rail, and the electronic slider is vertically displaced along the first limiting slide rail to drive the material pallet to move up and down.

[0013] Preferably, the mail bag is transported by the first conveyor belt to the bottom of the first pressing plate so that the first pressing plate presses the sealing tongue of the mail bag, the adsorption part sucks up the upper surface of the mail bag to open the mail bag, the filling part pushes the documents or certificates into the mail bag, and the first conveyor belt drives the mail bag to move to the glue dripping part so that glue is applied to the surface of the sealing tongue.

[0014] Preferably, the adsorption part includes a group of suction cups and a fixing plate connected to the suction cups, and the fixing plate is driven by the second driving motor to slide up and down along the third limiting slide rail.

[0015] Preferably, the loading section comprises a mail feed bin and a card pushing plate, wherein the card pushing plate pushes a single document or certificate in the mail feed bin to a position in front of the card pushing plate, and the card pushing plate pushes the single document or certificate into the mail bag.

[0016] Preferably, the bending box comprises a bending box curved portion, the bending box curved portion forms a bending curved surface on one side facing the mail bag, the end of the bending box curved portion close to the first conveyor belt is the lower end, the end away from the first conveyor belt is the higher end, and the width of the lower end is smaller than the width of the higher end (the side of the bending box curved portion away from the second conveyor belt is aligned with the edge of the second conveyor belt, so that the lateral distance of the bending curved surface of the bending box curved portion relative to the sealing tongue to be folded varies); the mail bag is driven by the second conveyor belt so that the back of the sealing tongue gradually contacts and moves with the bending box curved portion to be gradually folded; it can be understood that due to The curved portion of the bending box changes in height and width from the lower end to the higher end. When the sealing tongue moves along the curved surface, the back of the sealing tongue is first folded upward from the lower end of the curved portion of the bending box, and then the angle of the upward folding becomes larger during the movement toward the higher end. Finally, the curved portion of the bending box pushes the back of the sealing tongue to make it bend downward and gradually approach the surface of the mail bag body. In actual production, the curved surface facing the mail bag is an open surface. A push plate can also be provided near the bending box. After the sealing tongue bends downward and gradually approaches the surface of the mail bag body, the push plate pushes the back of the sealing tongue to make it completely fit with the surface of the mail bag body.

[0017] Preferably, the sealing mechanism further comprises a conveying wheel group and a pressing wheel group cooperating with the second conveyor belt; the conveying wheel group comprises a conveying wheel, a conveying wheel fixing plate and a second pressing plate, the second pressing plate being located in front of the bending box and used for pressing the mail bag body, the conveying wheel group positions and transports the mail bag body during the folding process of the sealing tongue of the mail bag, and the pressing wheel group is used for pressing the sealing tongue and the mail bag body tightly.

[0018] Preferably, a label sticking machine is arranged above the second conveyor belt at a position corresponding to the pressing wheel group, the pressing wheel group includes a small pressing wheel group and a large pressing wheel group arranged in sequence, the small pressing wheel group is shorter and only presses the sealing tongue part of the mail bag, the label sticking machine sticks the label to the mail bag pressed by the small pressing wheel group, the large pressing wheel group is longer and presses the sealing tongue and the mail bag body at the same time.

[0019] Preferably, the quality inspection mechanism includes a third conveyor belt, a qualified storage box, a bag transfer assembly, a roller assembly and a scanning assembly; the bag transfer assembly is used to move mail from the second conveyor belt to the third conveyor belt; the scanning assembly includes a scanning block and a moving rod, and the roller assembly includes a first roller group and a second roller group. The first roller group or the second roller group cooperates with the third conveyor belt to drive the mail bag to move to the qualified storage box or the rework box according to the scanning result of the scanning assembly.

[0020] Furthermore, the above structure also includes an equipment casing, which includes a footrest arranged at the bottom, a power switch and an emergency stop switch arranged on the side, and also includes a CNC table and a supporting platform arranged inside the equipment for supporting purposes.

[0021] The beneficial effects of the present invention are as follows: the automatic mail filling and bag sealing equipment provided by the device combines filling, bag sealing, labeling, and sorting (quality inspection) on one production line, and designs a sealing mechanism according to the envelope-type document bag for documents. The sealing mechanism includes a bending box. Through the special shape of the curved part of the bending box, the mail bag can be sealed during the conveyor belt transportation. The structure is simple and practical and the packaging efficiency is high. Finally, classification is achieved through the cooperation of the quality inspection camera and the roller assembly, which greatly saves labor costs and improves the efficiency of filling and bag sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of a mail encapsulation device embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the envelope transport mechanism of the middle structure;

[0025] Figure 3 for Figure 2 A schematic diagram of a portion of the structure in the middle;

[0026] Figure 4 for Figure 1 A schematic diagram of the structure of the filling mechanism of the middle structure;

[0027] Figure 5 for Figure 4 A schematic diagram of the structure from above;

[0028] Figure 6 for Figure 1 A schematic diagram of the structure of the connection between the sealing mechanism of the middle structure and the internal support platform;

[0029] Figure 7 for Figure 6 A schematic diagram of the sealing mechanism of the middle structure from a top view;

[0030] Figure 8 for Figure 1 Structural diagram of the quality inspection organization of the medium structure;

[0031] Fig. 9 Schematic diagram of the bending box structure (the direction indicated by the arrow is the relative displacement direction of the mail bag);

[0032] In the figure: 1-mail packaging equipment; 10-equipment housing, 101-foot, 102-power switch, 103-emergency stop switch, 11-CNC table, 111-display, 112-keyboard, 113-mouse, 12-support platform, 121-support frame, 122-support plate, 123-middle support frame, 13-sticking machine, 131-sticking machine adjustment slide mechanism;

[0033] 20-envelope transport mechanism, 21-material box, 211-material box guard plate, 212-material box support plate, 213-material box electronic slider, 214-first limit slide rail, 215-material box slide rail support plate, 22-transport mechanism, 221-first adsorption component, 221a-suction cup, 221b-fixing plate, 221c-slider, 222-second limit slide rail, 223-separation plate, 24-first drive motor;

[0034] 30-filling mechanism, 31-first conveyor belt, 32-adsorption part, 321-second adsorption assembly, 322-third limiting slide rail, 323-second drive motor, 33-filling part, 331-first feeding bin for mail items, 332-second feeding bin for mail items, 333-first card pushing plate, 334-first pressing plate, 335-second card pushing plate, 336-third drive motor, 34-glue dripping part;

[0035] 40-sealing mechanism, 41-second conveyor belt, 42-conveying wheel set, 421-conveying wheel, 422-conveying wheel fixing plate, 423-second pressing plate, 43-bending box, 431-bending box curved part, 4311-bending surface, 432-bending box fixing part, 44-pressing wheel set, 441-small pressing wheel set, 442-large pressing wheel set, 45-cleaning roller, 451-roller, 452-connecting crank;

[0036] 50-quality inspection mechanism, 51-third conveyor belt, 52-qualified storage box, 53-bag transfer assembly, 54-roller assembly, 541-first roller group, 542-second roller group, 55-scanning assembly, 551-scanning block, 552-moving rod DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. Therefore, the direction and position terms used are used to illustrate and understand the present invention, rather than to limit the scope of protection of the present invention.

[0040] Example 1

[0041] The present invention provides a mail packaging device, which is mainly used for realizing the automation process of filling and packaging a large number of mails when many organizations send mails, so as to achieve the purpose of improving efficiency.

[0042] See also Figure 1 In the embodiment of the present invention, the mail packaging device 1 includes a device housing 10, an envelope conveying mechanism 20, a filling mechanism 30, a sealing mechanism 40 and a quality inspection mechanism 50. The device housing 10 includes a footrest 101 arranged at the bottom, a power switch 102 and an emergency stop switch 103 arranged at the side. The mail packaging device also includes a numerical control table 11 arranged on the device table, a supporting platform 12 arranged inside the device for supporting, and a label pasting machine 13, and the label pasting machine includes a label pasting machine adjusting slide mechanism 131.

[0043] Specifically, the material transport mechanism 20 mainly transports mail envelopes to the filling mechanism 30, fills the documents to be sent into the envelopes, and after filling is completed, it is transmitted to the sealing mechanism 40 to seal the mail, and then the label sticking machine 13 is adjusted to a suitable height by the label sticking machine adjusting slide mechanism 131 to carry out the label sticking work, and finally transported to the quality inspection mechanism 50 for the final quality inspection.

[0044] See also Figure 2 and Figure 3 In Example 1, the material transport mechanism includes a material box 21, a transport mechanism 22 and a first drive motor 23, which are arranged on the support platform 12 through a support frame 121. The material box 21 includes a material box guard plate 211, a material support plate 212, an electronic slider 213, a first limiting slide rail 214 and a material box slide rail support plate 215, which are used to place the required mail bags; the transport mechanism 22 includes a first adsorption component 221, a second limiting slide rail 222 and a fixed clamping plate 223, which are used to transport the mail bags to the mail packaging device 1.

[0045] Specifically, Figure 2-Figure 3As shown, the material box 21 is connected and fixed to the equipment housing 10 through a material box guard plate 211, the required mail bags are placed on the material pallet 212, and the electronic slide rail 213 controls its sliding on the first limit slide rail 214 through gravity sensing, so that the required mail bags are always kept at a suitable height, so that the first adsorption component 211 adsorbs the mail bags to the conveying platform and then transports them to the first conveyor belt 31 in turn for subsequent work processes; the transportation mechanism 22 includes a first adsorption component 221, a second limit slide rail 222 and a separation plate 223, wherein the first adsorption component 221 includes a group of suction cups 221a, a fixing plate 221b and a slider 221c for adsorption. As for the number of suction cups in the group for adsorption, there is no specific restriction here. Specifically in this embodiment, the group is 4. After the suction cup 221a is sucked onto the required mail bag, the slider 221c slides to a suitable position on the second limiting slide rail 222, and the first driving motor 23 controls the separation plate 223 to separate the required mail bag from the suction cup to the conveying platform and then transport it to the first conveyor belt. The conveying platform can be a transmission belt or a push plate or any other planar conveying mechanism that can drive the displacement of the mail bag.

[0046] See also Figure 4 , Figure 5 In Example 1, the filling mechanism 30 includes a first conveyor belt 31, an adsorption unit 32, a filling unit 33, a glue dripping unit 34 and a fourth drive motor, and the filling mechanism 30 is arranged on the support platform 12 through the middle support frame 123. The adsorption unit 32 includes a second adsorption component 321, a third limiting slide rail 322 and a second drive motor 323, which are used to separate the required mail bag with a sealing tongue from the other side for subsequent filling work; the filling unit 33 includes a first mailing bin 331, a second mailing bin 332, a first card pusher 333, a first pressing plate 334, a second card pusher 335 and a third drive motor 336, which are used to fill the mailing contents into the mailing mail bag; the glue dripping unit 34 is used to apply a sticky substance to the sealing tongue, so as to apply a sticky material to the express delivery slip, and the sticky material can be glue or other sticky materials.

[0047] Specifically, when the first conveyor belt 31 transports the required mail bag to the filling mechanism 30, the first pressing plate 334 presses the sealing tongue part of the mail bag and under the action of the fourth driving motor, the first conveyor belt 31 stops running and places the mail bag under the adsorption portion 32; the second adsorption component 321 includes a group of suction cups 321a and a fixed plate 321b for adsorption, and one end of the fixed plate 321b has the characteristics of a slider. As for the number of suction cups in the group for adsorption, there is no specific limitation. Specifically in this embodiment, there are 2 suction cups in the group. After the suction cup 321a absorbs one side of the mail bag, the fixing plate 321b separates one side of the mail bag from the one side of the sealing tongue to a certain position under the operation of the second driving motor 323, and then the first pushing card plate 333 performs a horizontal pulling stroke under the drive of the motor to extract the mail in the first mail feeding bin 331 or the second mail feeding bin 332 to the front end of the second pushing card plate 335, and then the third driving motor 336 drives the second pushing card plate 335 to push the mail into the opened mail bag to complete the filling work. Subsequently, the adsorption part 32 stops the adsorption work, and the fourth driving motor drives the first conveyor belt 31 to continue to run, and transports the filled mail bag to the bottom of the glue dripping part 34, and controls the glue dripping part to drip the sticky substance on the sealing tongue at a uniform speed. Among them, a certain gap is left between the first pressing plate 334 and the first conveyor belt 31, so that the sealing tongue part can enter smoothly, and the two ends are raised and tilted upward at a certain angle to the first conveyor belt 31 to prevent the connecting parts from being pulled and torn during the adsorption and separation process of the two sides of the mail bag, thereby effectively improving the integrity of the mail bag and ensuring the working quality of the mail packaging equipment. In addition, the gap between the first pressing plate 334 and the first conveyor belt 31 and the size of the mail material bin are adjustable to adapt to most thicknesses of mailing mail bags and mail sizes.

[0048] See also Figure 6 and Figure 7 In Example 1, the sealing mechanism 40 includes a second conveyor belt 41, a conveying wheel group 42, a bending box 43, a pressing wheel group 44 and a cleaning roller 45, and the sealing mechanism 40 is arranged on the support platform 12 through the support frame 121. The conveying wheel group 42 includes a group of conveying wheels 421, a conveying wheel fixing plate 422 and a second pressing plate 423, which are used to continue to transfer the mails that have been filled and glued to the next process; the bending box 43 includes a bending box curved part 431 and a bending box fixing part 432, which are used to bend the sealing tongue part of the mail bag with adhesive material attached; the pressing wheel group 44 includes a small pressing wheel group 441 and a large pressing wheel group 442, which are used to make the bent sealing tongue closely contact with the mail bag; the cleaning roller 45 includes a roller 451 and a connecting crank 452, which are used to do the final cleaning and leveling work on the sealed mails.

[0049] Specifically, the conveying wheel group 42 positions and conveys the mail bag to the sealing mechanism 40. During the movement, the bending box curved portion 431 just contacts the back of the sealing tongue with the sticky substance attached. During the displacement of the mail bag and its sealing tongue relative to the bending box curved portion 431 driven by the second conveyor belt, the sealing tongue is folded upward and then further folded downward under the guidance of the bending box curved portion 431, so that it contacts the upper surface of the mail bag body to achieve the sealing purpose. During this process, the second pressing plate 423 fixed to the conveying wheel fixing plate 422 limits the main part of the mail bag to prevent the main part of the sealing tongue from being folded at the same time during the folding process, thereby ensuring smooth sealing and improving the sealing efficiency. Then, the pressing wheel group 44 presses the sealed mail bag tightly. The small pressure wheel group 441 is relatively short and only contacts the sealing tongue part, so as to adhere the sealing tongue to the mail bag body and make the label pasting machine paste the label on the surface of the mail bag body. The large pressure wheel group 442 is relatively long and can cover the sealing tongue part and contact the mail bag body, so as to further fully adhere the sealing tongue to the body. As for the number of large and small pressure wheel groups, there is no specific restriction here. Specifically in this embodiment, there are 2 small pressure wheel groups 441 and 3 large pressure wheel groups, and the number of pressure wheels in each group can be appropriately adjusted according to the width of the sealing tongue of the mail bag. The second conveyor belt 41 transports the mails that have completed the sealing work to the cleaning roller 45. The surface of the roller 451 is attached with a sticky material, which can clean and level the fine dust and other materials on the surface of the mail bag that affect the subsequent work. Among them, the crank 452 can flexibly drive the roller 451 to move up and down according to the thickness of the mail, so as to better contact the surface of the mail.

[0050] The express delivery labeling machine is a prior art. Those skilled in the art can refer to the published patents for installation design (for example: CN202122459259.0 a express delivery labeling machine), or directly purchase it.

[0051] See also Figure 8 In Example 1, the quality inspection mechanism 50 includes a third conveyor belt 51, a qualified storage box 52, a bag transfer assembly 53, a roller assembly 54 and a scanning assembly 55. The quality inspection mechanism 50 is arranged on the support platform 12 through the support plate 122. The bag transfer assembly 53 is a group of pulleys for moving mails onto the third conveyor belt 51; the roller assembly 54 includes a first roller group 541 and a second roller group 542 for classifying and processing mails that have completed quality inspection; the scanning assembly 55 includes a scanning block 551 and a moving rod 552 for scanning whether the mail packaging is qualified.

[0052] Specifically, the bag transfer component 53 moves the mails that have been packaged and labeled to the third conveyor belt 51. The scanning component 55 can adjust the scanning area of ​​the scanning block 551 according to the size of the mail through the moving rod 552, so that the mails can be accurately scanned and identified in the area. As for the detection means of the scanning block 551, there is no specific limitation. It can be to scan whether the express delivery information is clear and complete and archive it, or it can be other information scanning feedback devices. Specifically in this embodiment, it is to scan whether the express delivery information is complete and whether the mail packaging is intact. After the scanning is completed, the third conveyor belt 51, driven by the motor, can accurately classify qualified and unqualified mails. The qualified mails are sent to the qualified storage box 52 by the first roller group 541 and the third conveyor belt 51, and the unqualified mails are sent to the rework box on the other side by the second roller group 542 and the third conveyor belt 51. The third conveyor belt 51 is perpendicular to the transmission direction of the first and second conveyor belts, which can better realize the quality inspection and sorting work.

[0053] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A mail automatic filling and sealing device, characterized in that: It has the following institutions: A material transport mechanism (20) comprises a material box (21) and a transport mechanism (22), wherein the transport mechanism (22) transports the mail bag in the material box (21) to a first conveyor belt (31); The filling mechanism (30) comprises a first conveyor belt (31), a filling unit (33), and a glue dripping unit (34). The mail bag is transported to the filling unit (33) by the first conveyor belt (31). The filling unit (33) pushes the document or certificate into the mail bag, and the glue dripping unit (34) applies glue to the sealing surface of the mail bag. The sealing mechanism (40) comprises a second conveyor belt (41) and a bending box (43). The second conveyor belt (41) drives the mail bag to move relative to the bending box (43), so that the sealing tongue of the mail bag is folded upward relative to the mail bag body under the guidance of the curved portion (431) of the bending box, and then folded inward and downward to adhere to the mail bag body, and the label is attached by the label attaching machine (13); The quality inspection mechanism (50) comprises a third conveyor belt (51), a scanning assembly (55), and roller assemblies (54) arranged on both sides of the third conveyor belt (51). The scanning assembly (55) scans and inspects the mail bag, and the roller assemblies (54) on both sides drive the mail bag to move to a qualified storage box (52) or a rework box according to the scanning result of the scanning assembly (55).

2. The automatic mail filling and sealing device according to claim 1, characterized in that: A material support plate (212) is arranged in the material box (21). The material support plate (212) is driven by an electronic slider (213) to move in the material box (21) to transport the mail bag to a transport mechanism (22). The transport mechanism (22) comprises a first adsorption component (221) and a second limiting slide rail (222). After the first adsorption component (221) absorbs the mail bag on the material support plate (212), it moves along the second limiting slide rail (222) to a transport platform and then transports the mail bag to a first conveyor belt (31).

3. The automatic mail filling and sealing device according to claim 2, characterized in that: The material box (21) further comprises a first limiting slide rail (214), and the electronic slider (213) is vertically displaced along the first limiting slide rail (214) to drive the material support plate (212) to move up and down.

4. The automatic mail filling and sealing device according to claim 1, characterized in that: The mail bag is conveyed by the first conveyor belt (31) to the bottom of the first pressing plate (334) so ​​that the first pressing plate (334) presses the sealing tongue of the mail bag, the suction part (32) sucks up the upper surface of the mail bag to open the mail bag, the filling part (33) pushes the document or certificate into the mail bag, and the first conveyor belt (31) continues to drive the mail bag to move to the glue dripping part (34) so ​​that glue is applied to the surface of the sealing tongue.

5. The automatic mail filling and sealing device according to claim 4, characterized in that: The adsorption part (32) comprises a group of suction cups and a fixing plate connected to the suction cups, and the fixing plate is driven by a second driving motor (323) to slide up and down along the third limiting slide rail (322); The loading section (33) comprises a mail feed bin and a first card pushing plate (333) and a second card pushing plate (335); the first card pushing plate (333) pushes a single document or certificate in the mail feed bin to a position in front of the second card pushing plate (335); and the second card pushing plate (335) pushes the single document or certificate into the mail bag.

6. The automatic mail filling and sealing device according to claim 1, characterized in that: The bending box (43) comprises a bending box curved portion (431), the bending box curved portion (431) forms a bending curved surface (4311) on one side facing the mail bag, the bending curved surface (4311) is an open surface, the end of the bending box curved portion (431) close to the first conveyor belt (31) is a lower end, the end away from the first conveyor belt (31) is a higher end, and the width of the lower end is smaller than the width of the higher end, so that the bending box curved portion (431) gradually lifts the back of the sealing tongue during the displacement of the mail bag relative to the bending box curved portion (431); the mail bag is driven by the second conveyor belt (41) so that the back of the sealing tongue contacts the bending box curved portion (431) and is displaced to be gradually folded.

7. The automatic mail filling and sealing device according to claim 6, characterized in that: The sealing mechanism (40) further comprises a conveying wheel group (42) and a pressing wheel group (44) which cooperate with the second conveyor belt (41); the conveying wheel group (42) comprises a conveying wheel (421), a conveying wheel fixing plate (422) and a second pressing plate (423); the second pressing plate (423) is located in front of the bending box (43) and is used to press the mail bag body; the conveying wheel group (42) positions and transports the mail bag body during the folding process of the mail bag sealing tongue; the pressing wheel group (44) is used to press the sealing tongue and the mail bag body tightly.

8. The automatic mail bag filling and sealing device according to claim 6, characterized in that: A label pasting machine (13) is arranged above the second conveyor belt (41) at a position corresponding to the pressing wheel group (44). The pressing wheel group (44) comprises a small pressing wheel group (441) and a large pressing wheel group (442) which are arranged in sequence. The small pressing wheel group (441) is relatively short and only presses the sealing tongue part of the mail bag. The label pasting machine (13) pastes the label on the mail bag pressed by the small pressing wheel group (441). The large pressing wheel group (442) is relatively long and presses the sealing tongue and part of the mail bag body of the mail bag at the same time.

9. The automatic mail filling and sealing device according to claim 1, characterized in that: The quality inspection mechanism (50) comprises a third conveyor belt (51), a qualified storage box (52), a bag transfer assembly (53), a roller assembly (54) and a scanning assembly (55); the bag transfer assembly (53) is used to move mail from the second conveyor belt (41) to the third conveyor belt (51); the scanning assembly (55) comprises a scanning block (551) and a moving rod (552); the roller assembly (54) comprises a first roller group (541) and a second roller group (542); the first roller group (541) or the second roller group (542) cooperates with the third conveyor belt (51) to drive the mail bag to move to the qualified storage box (52) or the rework box according to the scanning result of the scanning assembly (55).

10. The automatic mail filling and sealing device according to any one of claims 1 to 9, characterized in that: The device also includes a device housing (10), which includes a footrest (101) arranged at the bottom, a power switch (102) and an emergency stop switch (103) arranged at the side, and also includes a numerical control table (11) and a support platform (12) arranged inside the device for supporting the device.

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