A cover fastening device

Abstract

The present invention discloses a lid fastening device, comprising: a lid conveying mechanism, a box body conveying mechanism, and a lid fastening mechanism. The lid conveying mechanism includes a conveyor belt, a first driving module, and a plurality of limiting blocks arranged along the conveyor belt, and a first limiting groove is formed between adjacent limiting blocks; the box body conveying mechanism includes a chain, a second driving module, and a plurality of chain plates, and a second limiting groove is provided on the chain plates; the lid fastening mechanism includes a first slide rail, a first bracket is slidably connected to the first slide rail, a second slide rail is fixedly connected to the first bracket, a second bracket is slidably connected to the second slide rail, an adsorption module is provided on the second bracket, a third driving module is provided on the first slide rail, and a fourth driving module for driving the second bracket to move along the second slide rail is provided on the second slide rail. Compared with the prior art, the lid fastening device provided by the present invention has the following beneficial effects: 1. It can fasten lids for box bodies of various specifications; 2. The box body has good stability during lid fastening; 3. The lid fastening efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of lid buckling, and particularly to a lid buckling device. Background Art

[0002] After food is loaded into a box body, a lid needs to be buckled on the box body. Existing lid buckling devices can often only adapt to the lid buckling of a certain specific specification of the box body. If it is necessary to buckle the lid of another specification of the box body, additional tooling needs to be developed, which is time-consuming and laborious. Summary of the Invention

[0003] In order to solve the defect that the prior art can only buckle the lid of a box body of one specification, the present invention provides a lid buckling device that can buckle the lids of box bodies of multiple specifications.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A lid buckling device includes: a lid conveying mechanism, a box body conveying mechanism, and a lid buckling mechanism. The lid conveying mechanism includes a conveyor belt, a first driving module connected to the conveyor belt, and a plurality of limiting blocks arranged along the conveyor belt. A first limiting groove for limiting the lid is formed between adjacent limiting blocks; the box body conveying mechanism is arranged below the lid conveying mechanism, and the box body conveying mechanism includes a chain, a second driving module connected to the chain, and a plurality of chain plates arranged along the chain. The chain plates are provided with second limiting grooves for embedding the box body; the lid buckling mechanism is arranged above the lid conveying mechanism, and the lid buckling mechanism includes a first sliding rail extending horizontally. A first bracket is slidably connected to the first sliding rail. The first bracket is fixedly connected with a second sliding rail extending vertically. A second bracket is slidably connected to the second sliding rail. An adsorption module for adsorbing the lid is arranged on the lower side of the second bracket. The first sliding rail is provided with a third driving module for driving the first bracket to move along the first sliding rail, and the second sliding rail is provided with a fourth driving module for driving the second bracket to move along the second sliding rail.

[0006] Further, a limiting edge for cooperating with the box body extends upward from the edge of the second limiting groove.

[0007] Further, the chain plates include a first chain plate, a second chain plate, and a third chain plate. The second limiting grooves of the first chain plate and the second chain plate are both rectangular, and the area of the second limiting groove of the first chain plate is larger than the area of the second limiting groove of the second chain plate. The second limiting groove of the third chain plate is circular.

[0008] Further, the conveyor belt includes a first end and a second end. From the first end to the second end of the conveyor belt, the limiting blocks are sequentially provided with a first embedding groove, a second embedding groove, a third embedding groove, and a fourth embedding groove. One side of the first embedding groove facing the first end of the conveyor belt penetrates the corresponding side of the limiting block. Both ends of the second embedding groove penetrate one side of the limiting block facing the first end of the conveyor belt. A first protrusion is formed between the first embedding groove and the second embedding groove. One side of the fourth embedding groove facing the second end of the conveyor belt penetrates the corresponding side of the limiting block. Both ends of the third embedding groove penetrate one side of the limiting block facing the second end of the conveyor belt. A second protrusion is formed between the third embedding groove and the fourth embedding groove; among any two adjacent limiting blocks, the maximum distance from the first embedding groove of one limiting block to the fourth embedding groove of the other limiting block is adapted to the second limiting groove of the second chain plate, and the maximum distance from the second embedding groove of one limiting block to the third embedding groove of the other limiting block is adapted to the second limiting groove of the first chain plate.

[0009] Further, the adsorption module includes a housing disposed on the lower side of the second bracket, an elastic body disposed between the housing and the second bracket, a suction cup disposed on the lower side of the housing, and a fifth driving module disposed on the housing. The fifth driving module is connected to the suction cup.

[0010] Further, the housing includes a top plate and side plates. The top plate is connected to one end of the elastic body away from the second bracket. The side plates are fixedly connected to the lower side of the top plate and are arranged along the edge of the top plate. The suction cup is disposed inside the side plates. An annular groove for cooperating with the edge of the lid is disposed on the inner side of the lower edge of the side plates.

[0011] Further, the lid buckling device further includes a tray mechanism. The tray mechanism is disposed on the lower side of the box body conveying mechanism. The tray mechanism includes a third bracket, a first tray disposed above the third bracket, a second tray slidably connected to the upper side of the first tray, and a tray seat disposed on the second tray. The third bracket is fixedly connected with a guide sleeve. A guide rod passes through the guide sleeve and is slidably connected to the guide rod. The guide rod extends vertically. The guide rod is fixedly connected to the first tray. The third bracket is provided with a seventh driving module for driving the first tray to reciprocate up and down. The first tray is provided with an eighth driving module. The eighth driving module is connected to the second tray.

[0012] Further, the chain includes a third end and a fourth end. The tray seat is provided with a third limiting groove and a fourth limiting groove. The third limiting groove is disposed on one side of the fourth limiting groove close to the third end of the chain. The third limiting groove is provided with a first groove bottom for supporting the bottom of the box body. The fourth limiting groove is provided with a second groove bottom for supporting the bottom of the box body. Both the first groove bottom and the second groove bottom are rectangular, and the area of the first groove bottom is larger than that of the second groove bottom. The first groove bottom is provided with a fifth limiting groove. The fifth limiting groove is provided with a third groove bottom for supporting the bottom of the box body. The third groove bottom is circular.

[0013] Furthermore, the seventh driving module includes a motor fixedly connected to the third bracket, a rotating shaft connected to the motor, a cam fixedly connected to the rotating shaft, and a transmission shaft disposed between the cam and the third bracket. One end of the transmission shaft is rotatably connected to the third bracket, and the other end of the transmission shaft is rotatably connected to the cam.

[0014] Compared with the prior art, a capping device provided by the present invention has the following beneficial effects: 1. It can cap boxes of various specifications; 2. The box has good stability during capping; 3. The capping efficiency is high. Description of the Drawings

[0015] Figure 1 Schematic diagram of an embodiment of the present application.

[0016] Figure 2 Of the embodiment of the present application Figure 1 Enlarged view of part A.

[0017] Figure 3 Of the embodiment of the present application Figure 1 Enlarged view of part B.

[0018] Figure 4 Schematic diagram of the box body of the embodiment of the present application.

[0019] Figure 5 First schematic diagram of the capping mechanism of the embodiment of the present application.

[0020] Figure 6 Second schematic diagram of the capping mechanism of the embodiment of the present application.

[0021] Figure 7 Of the embodiment of the present application Figure 6 Enlarged view of part C.

[0022] Figure 8 Schematic diagram of the box body conveying mechanism and the box supporting mechanism of the embodiment of the present application.

[0023] Figure 9 Another schematic diagram of the box body conveying mechanism and the box supporting mechanism of the embodiment of the present application.

[0024] Figure 10 Schematic diagram of the box supporting mechanism of the embodiment of the present application.

[0025] In the figure: lid conveying mechanism 11, conveyor belt 111, first end 1111, second end 1112, first driving module 112, limiting block 113, first protrusion 1131, second protrusion 1132, first embedding groove 1133, second embedding groove 1134, third embedding groove 1135, fourth embedding groove 1136, first limiting groove 114, box body conveying mechanism 12, chain 121, chain plate 122, second limiting groove 1221, limiting edge 1221a, lid buckling mechanism 13, first slide rail 131, first bracket 132, second slide rail 133, second bracket 134, adsorption module 135, housing 1351, top plate 1351a, side plate 1351b, annular groove 1351c, elastic body 1352, suction cup 1353, fifth driving module 1354, third driving module 136, fourth driving module 137, box supporting mechanism 14, third bracket 141, guide sleeve 1411, guide rod 1412, seventh driving module 1413, motor 1413a, rotating shaft 1413b, cam 1413c, transmission shaft 1413d, first supporting plate 142, second supporting plate 143, supporting seat 144, third limiting groove 1441, first groove bottom 1441a, fourth limiting groove 1442, second groove bottom 1442a, fifth limiting groove 1443, third groove bottom 1443a, lid 21, box body 22, main body 221, flanging 222, first space 223. Detailed implementation manners

[0026] The technical solutions of the present invention will be further specifically described below through embodiments in conjunction with the accompanying drawings.

[0027] Refer to Figures 1 to 10 , a lid buckling device, comprising: a lid conveying mechanism 11, a box body conveying mechanism 12, and a lid buckling mechanism 13. The lid conveying mechanism 11 includes a conveyor belt 111, a first driving module 112 connected to the conveyor belt 111, and a plurality of limiting blocks 113 arranged along the conveyor belt 111. A first limiting groove 114 for limiting the lid 21 is formed between adjacent limiting blocks 113. The conveyor belt 111 extends horizontally, and the first driving module 112 is arranged at one end of the conveyor belt 111. The first driving module 112 can be set as a motor.

[0028] The box conveying mechanism 12 is arranged below the lid conveying mechanism 11. The lid conveying mechanism 11 is used to transport the lid 21 to below the box conveying mechanism 12. The box conveying mechanism 12 is used to transport the box 22 to above the lid conveying mechanism 11. The moving direction of the lid 21 and the moving direction of the box 22 are perpendicular. The box conveying mechanism 12 includes a chain 121, a second driving module (not shown in the figure) connected to the chain 121, and a plurality of chain plates 122 arranged along the chain 121. The chain plate 122 is provided with a second limiting groove 1221 for embedding the box 22. The chain 121 extends horizontally, and the extending direction of the chain 121 is perpendicular to the extending direction of the conveyor belt 111. The second driving module (not shown in the figure) can be set as a motor. The extending direction of the chain plate 122 is perpendicular to the extending direction of the chain 121. A plurality of second limiting grooves 1221 are arranged on the chain plate 122. The second limiting grooves 1221 are evenly arranged along the extending direction of the chain plate 122.

[0029] The lid buckling mechanism 13 is arranged above the lid conveying mechanism 11. The lid buckling mechanism 13 is used to pick up the lid 21 on the lid conveying mechanism 11 and cover the lid 21 on the box 22 on the box conveying mechanism 12. The lid buckling mechanism 13 includes a first slide rail 131 extending horizontally. Specifically, the extending direction of the first slide rail 131 is the same as the extending direction of the chain 121. The first slide rail 131 is slidably connected with a first bracket 132. The first bracket 132 is fixedly connected with a second slide rail 133 extending vertically. The second slide rail 133 is slidably connected with a second bracket 134. An adsorption module 135 for adsorbing the lid 21 is arranged on the lower side of the second bracket 134. The first slide rail 131 is provided with a third driving module 136 for driving the first bracket 132 to move along the first slide rail 131. The second slide rail 133 is provided with a fourth driving module 137 for driving the second bracket 134 to move along the second slide rail 133. The third driving module can be set as a first driving belt connected to the first bracket 132 and a motor connected to the first driving belt. The extending direction of the first driving belt is the same as the extending direction of the first slide rail 131. The fourth driving module can be set as a second driving belt connected to the second bracket 134 and a motor connected to the second driving belt. The extending direction of the second driving belt is the same as the extending direction of the second slide rail 133.

[0030] With the above settings, the adsorption module 135 can move horizontally, that is, move along the extending direction of the first slide rail 131, and can also move vertically, that is, move along the extending direction of the second slide rail 133. When buckling the lid, the adsorption module 135 moves horizontally above the lid 21 on the lid conveying mechanism 11, then the adsorption module 135 moves downward to adsorb the lid 21, then the adsorption module 135 moves upward, and then the adsorption module 135 moves horizontally to the upper side of the box 22 on the box conveying mechanism 12, and then the adsorption module 135 moves downward to cover the lid 21 on the box 22.

[0031] See Figure 4 Figure 4 , the box body 22 includes a main body 221, and a flange 222 is fixedly connected to the outer side of the upper edge of the main body 221. A first space 223 with an opening downward is formed between the flange 222 and the main body 221. A limiting edge 1221a for cooperating with the first space 223 extends upward from the edge of the second limiting groove 1221.

[0032] When the box body conveying mechanism 12 conveys the box body 22, the main body 221 is embedded in the second embedding groove 1134 and abuts against the edge of the second embedding groove 1134. At least part of the limiting block 113 enters the first space 223, and the lower side of the flange 222 abuts against the upper side of the chain plate 122.

[0033] The box body 22 includes a first box body, a second box body and a third box body. The openings of the first box body and the second box body are both rectangular, and the area of the opening of the first box body is larger than the area of the opening of the second box body. The opening of the third box body is circular. The chain plate 122 includes a first chain plate for conveying the first box body, a second chain plate for conveying the second box body, and a third chain plate for conveying the third box body. The second limiting groove 1221 of the first chain plate is adapted to the first box body, the second limiting groove 1221 of the second chain plate is adapted to the second box body, and the second limiting groove 1221 of the third chain plate is adapted to the third box body. The shapes of the second limiting grooves 1221 of the first chain plate and the second chain plate are both rectangular, and the area of the second limiting groove 1221 of the first chain plate is larger than the area of the second limiting groove 1221 of the second chain plate. The shape of the second limiting groove 1221 of the third chain plate is circular.

[0034] The outer edge of the lid 21 bulges upward and forms a card slot (not shown in the figure) downward, and the card slot is used for clamping with the upper edge of the box body 22.

[0035] The lid 21 includes a first lid for cooperating with the first box body, a second lid for cooperating with the second box body, and a third lid for cooperating with the third box body. The conveyor belt 111 includes a first end 1111 and a second end 1112.

[0036] See Figure 2, from the first end 1111 to the second end 1112 of the conveyor belt 111, the limiting blocks 113 are successively provided with a first embedding groove 1133, a second embedding groove 1134, a third embedding groove 1135 and a fourth embedding groove 1136. One side of the first embedding groove 1133 facing the first end 1111 of the conveyor belt 111 penetrates the corresponding side of the limiting block 113, both ends of the second embedding groove 1134 penetrate the side of the limiting block 113 facing the first end 1111 of the conveyor belt 111, and a first protrusion 1131 is formed between the first embedding groove 1133 and the second embedding groove 1134. One side of the fourth embedding groove 1136 facing the second end 1112 of the conveyor belt 111 penetrates the corresponding side of the limiting block 113, both ends of the third embedding groove 1135 penetrate the side of the limiting block 113 facing the second end 1112 of the conveyor belt 111, and a second protrusion 1132 is formed between the third embedding groove 1135 and the fourth embedding groove 1136.

[0037] Among any two adjacent limiting blocks 113, the maximum distance from the first embedding groove 1133 of one limiting block 113 to the fourth embedding groove 1136 of the other limiting block 113 is adapted to the second limiting groove 1221 of the second chain plate, and the maximum distance from the second embedding groove 1134 of one limiting block 113 to the third embedding groove 1135 of the other limiting block 113 is adapted to the second limiting groove 1221 of the first chain plate.

[0038] See Figure 2 , specifically, when the lid conveying mechanism 11 conveys the first lid, the first lid is located between adjacent limiting blocks 113. The clamping groove at one end of the first lid is embedded with the first protrusion 1131, and the clamping groove at the other end of the first lid is embedded with the second protrusion 1132, that is, one end of the first lid is located in the second embedding groove 1134, and the other end of the first lid is located in the third embedding groove 1135.

[0039] When the lid conveying mechanism 11 conveys the second lid, the second lid is located between adjacent limiting blocks 113. One end of the second lid abuts against the side of the first protrusion 1131 close to the first end 1111, and the other end of the second lid abuts against the side of the second protrusion 1132 close to the second end 1112, that is, one end of the second lid is located in the first embedding groove 1133, and the other end of the second lid is located in the fourth embedding groove 1136.

[0040] When the lid conveying mechanism 11 conveys the third lid, the third lid is located between adjacent limiting blocks 113.

[0041] See Figure 7, the adsorption module 135 includes a housing 1351 disposed on the lower side of the second bracket 134, an elastomer 1352 disposed between the housing 1351 and the second bracket 134, a suction cup 1353 disposed on the lower side of the housing 1351, and a fifth driving module 1354 disposed on the housing 1351. The fifth driving module 1354 is connected to the suction cup 1353. The elastomer 1352 can be set as a spring. The fifth driving module 1354 is used to drive the suction cup 1353 to move up and down. When adsorbing the lid 21, the second bracket 134 moves downward. When the lid 21 enters the housing 1351, the suction cup 1353 moves downward under the action of the fifth limiting groove 1443 and adsorbs the lid 21.

[0042] The housing 1351 includes a top plate 1351a and a side plate 1351b. The top plate 1351a is connected to one end of the elastomer 1352 away from the second bracket 134. The side plate 1351b is fixedly connected to the lower side of the top plate 1351a and is arranged along the edge of the top plate 1351a. The suction cup 1353 is disposed inside the side plate 1351b. An annular groove 1351c for cooperating with the edge of the first lid is provided on the inner side of the lower edge of the side plate 1351b of the adsorption module 135.

[0043] Specifically, when the adsorption module 135 adsorbs the first lid, the edge of the first lid is located in the annular groove 1351c. When the adsorption module 135 adsorbs the second lid, the edge of the second lid abuts against the inner wall of the side plate 1351b.

[0044] The lid fastening device further includes a tray mechanism 14, and the tray mechanism 14 is disposed on the lower side of the box conveying mechanism 12. The tray mechanism 14 is used to support the bottom of the box 22 located on the box conveying mechanism 12. When the lid 21 covers the box 22, the lid 21 exerts a downward force on the box 22. To ensure the stability of the box 22, the tray mechanism 14 supports the bottom of the box 22.

[0045] See Figure 8, as an implementation, the tray mechanism 14 includes a third support 141, a first tray 142 disposed above the third support 141, a second tray 143 slidably connected to the upper side of the first tray 142, and a tray seat 144 disposed on the second tray 143. The tray seat 144 is used to support the box body 22. The third support 141 is fixedly connected with a guide sleeve 1411. A guide rod 1412 passes through the guide sleeve 1411 and is slidably connected to the guide rod 1412. The guide rod 1412 extends vertically and is fixedly connected to the first tray 142. The third support 141 is provided with a seventh driving module 1413 for driving the first tray 142 to move up and down reciprocally. The first tray is provided with an eighth driving module, and the eighth driving module is connected to the second tray. The third support 141 is fixedly connected to the lower side of the first slide rail 131. The eighth driving module can be set as an electric cylinder, can be set as a cylinder, or other devices, and can be adjusted according to actual needs. The eighth driving module drives the second tray to move in the extending direction of the chain 121. The extending direction of the second tray 143 is the same as the extending direction of the chain plate 122. At least two tray seats 144 are arranged on the second tray 143. The tray seats 144 are arranged in sequence along the extending direction of the second tray 143.

[0046] See Figure 10 , the chain 121 includes a third end portion (not shown in the figure) and a fourth end portion (not shown in the figure). The tray seat 144 is provided with a third limiting groove 1441 and a fourth limiting groove 1442. The third limiting groove 1441 is disposed on one side of the fourth limiting groove 1442 close to the third end portion of the chain 121. The third limiting groove 1441 is adapted to the first box body and is provided with a first groove bottom 1441a for supporting the bottom of the first box body. The fourth limiting groove 1442 is adapted to the second box body and is provided with a second groove bottom 1442a for supporting the bottom of the second box body. The first groove bottom 1441a is provided with a fifth limiting groove 1443. The fifth limiting groove 1443 is adapted to the third box body and is provided with a third groove bottom 1443a for supporting the bottom of the third box body. Both the first groove bottom 1441a and the second groove bottom 1442a are rectangular, and the area of the first groove bottom 1441a is larger than the area of the second groove bottom 1442a. The third groove bottom 1443a is circular.

[0047] When the adsorption module 135 adsorbs the first lid and buckles the lid on the first box body, under the action of the eighth driving module, the first groove bottom 1441a moves to the lower side of the first box body. Under the action of the seventh driving module 1413, the first groove bottom 1441a moves upward and abuts against the bottom of the first box body. Then the adsorption module 135 moves downward to buckle the first lid on the first box body.

[0048] When the adsorption module 135 adsorbs the second lid and closes the second box body, under the action of the eighth driving module, the second bottom 1442a of the groove moves to the lower side of the second box body. Under the action of the seventh driving module 1413, the second bottom 1442a of the groove moves upward and abuts against the bottom of the second box body. Then the adsorption module 135 moves downward to fasten the second lid on the second box body.

[0049] When the adsorption module 135 adsorbs the third lid and closes the third box body, under the action of the eighth driving module, the third bottom 1443a of the groove moves to the lower side of the third box body. Under the action of the seventh driving module 1413, the third bottom 1443a of the groove moves upward and abuts against the bottom of the third box body. Then the adsorption module 135 moves downward to fasten the third lid on the third box body.

[0050] The seventh driving module 1413 includes a motor 1413a fixedly connected to the third bracket 141, a rotating shaft 1413b connected to the motor 1413a, a cam 1413c fixedly connected to the rotating shaft 1413b, and a transmission shaft 1413d arranged between the cam 1413c and the third bracket 141. One end of the transmission shaft 1413d is rotatably connected to the third bracket 141, and the other end of the transmission shaft 1413d is rotatably connected to the cam 1413c.

[0051] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A lid fastening device, characterized in that, it comprises: A lid conveying mechanism, which includes a conveyor belt, a first driving module connected to the conveyor belt, and a number of limiting blocks arranged along the conveyor belt. A first limiting groove for limiting the lid is formed between adjacent limiting blocks; A box body conveying mechanism, which is arranged below the lid conveying mechanism. The box body conveying mechanism includes a chain, a second driving module connected to the chain, and a number of chain plates arranged along the chain. The chain plate is provided with a second limiting groove for embedding the box body; A lid fastening mechanism, which is arranged above the lid conveying mechanism. The lid fastening mechanism includes a first slide rail extending horizontally. The first slide rail is slidably connected with a first bracket. The first bracket is fixedly connected with a second slide rail extending vertically. The second slide rail is slidably connected with a second bracket. An adsorption module for adsorbing the lid is arranged on the lower side of the second bracket. The first slide rail is provided with a third driving module for driving the first bracket to move along the first slide rail. The second slide rail is provided with a fourth driving module for driving the second bracket to move along the second slide rail; The chain plate includes a first chain plate, a second chain plate, and a third chain plate. The second limiting grooves of the first chain plate and the second chain plate are both rectangular, and the area of the second limiting groove of the first chain plate is larger than the area of the second limiting groove of the second chain plate. The second limiting groove of the third chain plate is circular; The conveyor belt includes a first end and a second end. From the first end to the second end of the conveyor belt, the limiting blocks are sequentially provided with a first embedding groove, a second embedding groove, a third embedding groove, and a fourth embedding groove. One side of the first embedding groove facing the first end of the conveyor belt penetrates the corresponding side of the limiting block. Both ends of the second embedding groove penetrate the side of the limiting block facing the first end of the conveyor belt. A first protrusion is formed between the first embedding groove and the second embedding groove. One side of the fourth embedding groove facing the second end of the conveyor belt penetrates the corresponding side of the limiting block. Both ends of the third embedding groove penetrate the side of the limiting block facing the second end of the conveyor belt. A second protrusion is formed between the third embedding groove and the fourth embedding groove; Among any two adjacent limiting blocks, the maximum distance from the first embedding groove of one limiting block to the fourth embedding groove of the other limiting block is adapted to the second limiting groove of the second chain plate, and the maximum distance from the second embedding groove of one limiting block to the third embedding groove of the other limiting block is adapted to the second limiting groove of the first chain plate.

2. The lid fastening device according to claim 1, characterized in that, A limiting edge for cooperating with the box body extends upward from the edge of the second limiting groove.

3. The lid fastening device according to claim 1, characterized in that, The adsorption module includes a housing disposed on the lower side of the second bracket, an elastomer disposed between the housing and the second bracket, a suction cup disposed on the lower side of the housing, and a fifth drive module disposed on the housing, and the fifth drive module is connected to the suction cup.

4. A lid fastening device according to claim 3, wherein, the housing includes a top plate and side plates, the top plate is connected to one end of the elastomer away from the second bracket, the side plates are fixedly connected to the lower side of the top plate and are arranged along the edge of the top plate, the suction cup is disposed within the side plates, and an annular groove for mating with the edge of the lid is disposed on the inner side of the lower edge of the side plates.

5. A lid fastening device according to claim 1, wherein, the lid fastening device further includes a tray mechanism disposed on the lower side of the box body conveying mechanism, the tray mechanism includes a third bracket, a first tray disposed above the third bracket, a second tray slidably connected to the upper side of the first tray, and a tray seat disposed on the second tray, the third bracket is fixedly connected with a guide sleeve, the guide sleeve passes through a guide rod and is slidably connected to the guide rod, the guide rod extends vertically, the guide rod is fixedly connected to the first tray, the third bracket is provided with a seventh drive module for driving the first tray to reciprocate up and down, and the first tray is provided with an eighth drive module, and the eighth drive module is connected to the second tray.

6. A lid fastening device according to claim 5, wherein, the chain includes a third end portion and a fourth end portion, the tray seat is provided with a third limit groove and a fourth limit groove, the third limit groove is disposed on one side of the fourth limit groove close to the third end portion of the chain, the third limit groove is provided with a first groove bottom for supporting the bottom of the box body, the fourth limit groove is provided with a second groove bottom for supporting the bottom of the box body, both the first groove bottom and the second groove bottom are rectangular, and the area of the first groove bottom is larger than the area of the second groove bottom, the first groove bottom is provided with a fifth limit groove, and the fifth limit groove is provided with a third groove bottom for supporting the bottom of the box body, and the third groove bottom is circular.

7. A lid fastening device according to claim 5, wherein, the seventh drive module includes a motor fixedly connected to the third bracket, a rotating shaft connected to the motor, a cam fixedly connected to the rotating shaft, and a transmission shaft disposed between the cam and the third bracket, one end of the transmission shaft is rotatably connected to the third bracket, and the other end of the transmission shaft is rotatably connected to the cam.

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