Carton Packing Machine

Abstract

The present invention provides a carton packaging machine, which includes a lower cover folding device, a carton transportation mechanism, an upper cover folding device and a positioning mechanism. The lower cover folding device includes a box opening mechanism, a lower flap folding mechanism for folding the first lower sub-cover and the second lower sub-cover, a tongue folding and cover closing mechanism for folding the lower cover tongue and pushing the lower main cover to close, and a transfer mechanism. The upper cover folding device includes an upper flap folding mechanism for folding the first upper sub-cover and the second upper sub-cover, an upper tongue folding mechanism for folding the upper cover tongue, an upper cover closing mechanism for pushing the upper main cover to close, a lock buckle folding mechanism for pushing the lock buckle to bend relative to the bending part, and a lock buckle inserting mechanism for pushing the bending part so that the lock buckle is inserted into the insertion hole. The carton packaging machine provided by the present invention can realize the automatic folding of the upper cover and the lower cover of the carton through the lower cover folding device and the upper cover folding device, thereby reducing the labor cost and the time cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging, and more specifically, relates to a carton packaging machine. Background Art

[0002] A carton is a relatively common packaging material for product packaging. When the carton comes in, it is usually folded into a flat plate shape. When it needs to be packed into a box, the carton needs to be folded into a box shape along the pre-bent lines. Currently, manual folding of cartons is usually used, which consumes a lot of human resources, and the speed of manual folding is slow, with both high labor costs and time costs. Summary of the Invention

[0003] The purpose of the embodiment of the present invention is to provide a carton packaging machine to solve the technical problems of high labor costs and time costs caused by manual folding of cartons in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a carton packaging machine for folding a carton. The carton includes a first side plate, a second side plate, a third side plate, and a fourth side plate that are sequentially connected end to end. It also includes a first lower sub-cover connected to the lower end of the second side plate, a second lower sub-cover connected to the lower end of the fourth side plate, a lower main cover connected to the lower end of the third side plate, and a lower cover tongue connected to the lower main cover. It further includes a first upper sub-cover connected to the upper end of the second side plate, a second upper sub-cover connected to the upper end of the fourth side plate, an upper main cover connected to the upper end of the first side plate, an upper cover tongue connected to the upper main cover, a bending portion connected to the upper end of the third side plate, and a lock connected to the bending portion. There is a jack at the connection between the upper main cover and the upper cover tongue. The carton packaging machine includes:

[0005] A lower cover folding device, including an opening box mechanism for unfolding the flat carton into a three-dimensional carton, a lower flap folding mechanism for folding the first lower sub-cover and the second lower sub-cover, a tongue folding and lid closing mechanism for folding the lower cover tongue and pushing the lower main cover to close the lid, and a transfer mechanism for moving the carton from the lower flap folding mechanism to the tongue folding and lid closing mechanism and for moving the carton from the tongue folding and lid closing mechanism to the carton transportation device;

[0006] The carton transportation device for receiving and transporting the carton from the transfer mechanism;

[0007] The upper cover folding device includes an upper flap mechanism for flapping the first upper sub-cover and the second upper sub-cover, an upper tongue folding mechanism for folding the upper cover tongue, an upper cover closing mechanism for pushing the upper main cover to close, a lock buckle folding mechanism for pushing the lock buckle to bend relative to the bent portion, and a lock buckle inserting mechanism for pushing the bent portion so that the lock buckle is inserted into the insertion hole. The upper flap mechanism, the upper tongue folding mechanism, the upper cover closing mechanism, the lock buckle folding mechanism, and the lock buckle inserting mechanism are all arranged above the carton conveying device;

[0008] A plurality of positioning devices are arranged in sequence along the conveying direction of the carton conveying device for stopping the carton on the carton conveying device.

[0009] In one embodiment, the carton opening mechanism includes an opening cylinder, a first suction cup, and a positioning push plate for pushing the second side plate. The first suction cup is connected to the moving end of the opening cylinder, so that the first suction cup moves between the carton storage location and the positioning push plate.

[0010] In one embodiment, a side plate positioning cylinder for cooperating with the positioning push plate to clamp the carton is further fixed to the moving end of the transfer mechanism, and the moving end of the side plate positioning cylinder is used to abut against the fourth side plate.

[0011] In one embodiment, the lower cover folding device further includes a carton storage mechanism, which includes a storage box for stacking and storing the cartons, a front stopper near the discharge end, a rear baffle cooperating with the front stopper to clamp the cartons, and an elastic member elastically connected between the rear baffle and the storage box.

[0012] In one embodiment, the carton storage mechanism further includes a width adjustment structure for adjusting the width of the storage box and a first height adjustment structure for adjusting the height of the storage box.

[0013] In one embodiment, the lower flap mechanism includes a second suction cup for adsorbing the first side plate after the carton is opened, a lower flap cylinder for pushing the first lower sub-cover, and a guide plate for pushing the second lower sub-cover. The second suction cup is connected to the moving end of the transfer mechanism, so that when the carton on the second suction cup moves, the second lower sub-cover bends relative to the fourth side plate under the push of the guide plate.

[0014] In one embodiment, the tongue closing mechanism includes a carton fixing mechanism for receiving and fixing the carton after flapping from the second suction cup, a lower tongue folding mechanism for pushing the lower cover tongue to bend the lower cover tongue relative to the lower main cover, a main cover supporting mechanism for supporting on the lower main cover when bending the lower cover tongue, and a lower cover closing mechanism for pushing the lower main cover.

[0015] In one embodiment, the lower cover folding device further includes a horizontal adjustment structure for adjusting the horizontal position of the carton fixing mechanism and a vertical adjustment structure for adjusting the vertical movement of the carton fixing mechanism, and the horizontal adjustment structure, the vertical adjustment structure and the carton fixing mechanism are connected in sequence.

[0016] In one embodiment, the lower cover folding device further includes a guide rod for bending the lower main cover relative to the third side plate and a main cover positioning cylinder for pushing and positioning the lower main cover after bending, and the main cover positioning cylinder is fixed to the moving end of the transfer mechanism.

[0017] In one embodiment, the carton transportation mechanism includes two belt transmission mechanisms arranged at intervals and a lead screw mechanism for adjusting the distance between the two belt transmission mechanisms, and the carton is clamped and transported by the belts of the two belt transmission mechanisms.

[0018] In one embodiment, the upper swing cover mechanism includes an upper swing cover cylinder for pushing the first upper sub-cover to fold relative to the second side plate and a first guide rod for pushing the second upper sub-cover to fold relative to the fourth side plate.

[0019] In one embodiment, the upper tongue folding mechanism includes a second guide rod for pushing the upper main cover to fold relative to the third side plate, an upper tongue folding cylinder for pushing the upper cover tongue to fold relative to the upper main cover, and a support plate for supporting the upper main cover during tongue folding.

[0020] In one embodiment, the folding lock mechanism includes a third guide rod for folding the bent portion relative to the third side plate, a folding lock cylinder for pushing the lock to fold relative to the bent portion, and a first support member for supporting the bent portion.

[0021] In one embodiment, the inserting lock mechanism includes an inserting lock cylinder for inserting the lock into the insertion hole and a second support member for preventing the lock from rebounding.

[0022] In one embodiment, the carton transportation mechanism has a tongue folding station, a lid closing station and an inserting lock station, and the positioning device is provided at the tongue folding station, the lid closing station and the inserting lock station. The upper tongue folding mechanism is arranged at the tongue folding station, the upper lid closing mechanism and the folding lock mechanism are both arranged at the lid closing station, and the inserting lock mechanism is arranged at the inserting lock station.

[0023] In one embodiment, the upper cover folding device further includes a second height adjustment structure, and the upper swing cover mechanism, the upper tongue folding mechanism, the upper cover closing mechanism, the folding lock mechanism, and the insertion lock mechanism are all connected to the height adjustment structure.

[0024] In one embodiment, the number of the height adjustment structures is three, and they are arranged in sequence along the transmission direction of the carton transportation mechanism. The upper swing cover mechanism and the upper tongue folding mechanism are connected to the first height adjustment structure, the upper cover closing mechanism and the folding lock mechanism are connected to the second height adjustment structure, and the insertion lock mechanism is connected to the third height adjustment structure.

[0025] The beneficial effects of the carton packaging machine provided by the present invention are as follows: Compared with the prior art, the carton packaging machine of the present invention includes a lower cover folding device, a carton transportation device, an upper cover folding device, and a positioning device. The lower cover folding device can unfold the carton into a three-dimensional shape through the box opening mechanism, perform swing covering on the first lower sub-cover and the second lower sub-cover through the lower swing cover mechanism, and perform tongue folding and covering through the tongue folding and covering mechanism. After the lower cover of the carton is folded, the carton is moved to the carton transportation device through the transfer mechanism. During the transportation of the carton, the product can be placed in the carton, and then the upper cover is folded at the upper cover folding device. Specifically, the upper swing cover mechanism performs swing covering on the first upper sub-cover and the second upper sub-cover, the upper tongue folding mechanism folds the upper cover tongue, the upper cover closing mechanism closes the upper main cover, and the folding lock mechanism and the insertion lock mechanism insert the lock into the lock hole. In this way, the automatic folding of the upper and lower covers of the carton can be realized through the lower cover folding device and the upper cover folding device, thereby reducing the labor cost and time cost. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a three-dimensional structure diagram of the carton provided by the embodiment of the present invention;

[0028] Figure 2 It is a three-dimensional structure diagram of the carton packaging machine provided by the embodiment of the present invention;

[0029] Figure 3 It is a three-dimensional structure diagram of the lower cover folding device provided by the embodiment of the present invention;

[0030] Figure 4 It is a three-dimensional structure diagram of the carton storage mechanism provided by the embodiment of the present invention;

[0031] Figure 5 Is a three-dimensional structure diagram of the first adsorption component provided by an embodiment of the present invention;

[0032] Figure 6 Is a three-dimensional structure of the box-opening mechanism, lower swing cover mechanism, and transfer mechanism provided by an embodiment of the present invention Figure 1 ;

[0033] Figure 7 Is a three-dimensional structure of the box-opening mechanism, lower swing cover mechanism, and transfer mechanism provided by an embodiment of the present invention Figure 2 ;

[0034] Figure 8 Is a three-dimensional structure diagram of the second adsorption component, lower swing cover cylinder, and side plate positioning cylinder provided by an embodiment of the present invention;

[0035] Figure 9 Is a three-dimensional structure diagram of the tongue-folding and lid-closing mechanism provided by an embodiment of the present invention;

[0036] Figure 10 Is a three-dimensional structure of the paper box fixing mechanism provided by an embodiment of the present invention Figure 1 ;

[0037] Figure 11 Is a three-dimensional structure of the paper box fixing mechanism provided by an embodiment of the present invention Figure 2 ;

[0038] Figure 12 Is a three-dimensional structure diagram of the lower tongue-folding mechanism and lower lid-closing mechanism provided by an embodiment of the present invention;

[0039] Figure 13 Is a three-dimensional structure diagram of the main lid support mechanism provided by an embodiment of the present invention;

[0040] Figure 14 Is a three-dimensional structure of the upper lid folding device and paper box transportation device provided by an embodiment of the present invention Figure 1 ;

[0041] Figure 15 Is a three-dimensional structure of the upper lid folding device and paper box transportation device provided by an embodiment of the present invention Figure 2 ;

[0042] Figure 16 Is a three-dimensional structure of the upper swing cover mechanism and upper tongue-folding mechanism provided by an embodiment of the present invention Figure 1 ;

[0043] Figure 17 Is a three-dimensional structure of the upper swing cover mechanism and upper tongue-folding mechanism provided by an embodiment of the present invention Figure 2 ;

[0044] Figure 18Stereoscopic structure diagram of the upper cover combining mechanism and the folding lock mechanism provided by the embodiment of the present invention;

[0045] Figure 19 Stereoscopic structure diagram of the plug lock mechanism provided by the embodiment of the present invention.

[0046] Among them, each reference numeral in the figure:

[0047] 100 - paper box; 010 - first side plate; 020 - second side plate; 030 - third side plate; 040 - fourth side plate; 051 - first lower sub - cover; 052 - second lower sub - cover; 053 - lower main cover; 054 - lower cover tongue; 061 - first upper sub - cover; 062 - second upper sub - cover; 063 - upper main cover; 064 - upper cover tongue; 065 - jack; 066 - bending part; 067 - lock;

[0048] 1 - lower cover folding device; 11 - paper box storage mechanism; 111 - storage box; 1111 - first material box; 1112 - second material box; 112 - front stopper; 113 - rear baffle; 114 - width adjustment structure; 1141 - width adjustment support seat; 1142 - width adjustment screw; 1143 - width guide rod; 1144 - width adjustment slider; 115 - first height adjustment structure; 1151 - height adjustment column; 1152 - height adjustment slider; 1153 - slider locking part; 1154 - gasket; 12 - box opening mechanism; 121 - first adsorption component; 1211 - box opening cylinder; 1212 - first suction cup holder; 1213 - first suction cup; 122 - positioning push plate; 13 - lower swing cover mechanism; 131 - second adsorption component; 1311 - second suction cup holder; 1312 - second suction cup; 132 - lower swing cover cylinder; 133 - guide plate; 1st - side plate positioning cylinder; 135 - main cover positioning cylinder; 14 - folding tongue and cover combining mechanism; 141 - paper box fixing mechanism; 1411 - paper box positioning cylinder; 1412 - positioning suction cup; 1413 - positioning plate; 14131 - positioning surface; 1414 - horizontal adjustment structure; 14141 - horizontal adjustment support seat; 14142 - rotating screw; 14143 - nut holder; 14144 - slide rail; 1415 - vertical adjustment structure; 14151 - vertical adjustment column; 14152 - vertical adjustment sliding block; 14153 - height locking part; 142 - lower folding tongue mechanism; 1421 - lower folding tongue cylinder; 1422 - lower folding tongue push plate; 143 - main cover support mechanism; 1431 - support cylinder; 14311 - sliding frame; 14312 - driving block; 1432 - support rod; 1433 - buffer; 144 - lower cover combining mechanism; 1441 - lower cover combining cylinder; 1442 - lower cover combining push plate; 15 - transfer mechanism; 151 - transfer frame; 152 - third adsorption component; 1521 - transfer cylinder; 1522 - third suction cup; 153 - guide rod;

[0049] 2 - Carton transportation device; 21 - Belt transmission mechanism; 22 - Lead screw mechanism;

[0050] 3 - Upper cover folding device; 31 - Upper swing cover mechanism; 311 - Upper swing cover cylinder; 312 - Pushing piece; 313 - First guide rod; 32 - Upper tongue folding mechanism; 321 - Second guide rod; 322 - Upper tongue folding cylinder; 323 - Support plate; 3231 - Inclined surface; 3232 - Vertical surface; 324 - Fourth guide rod; 33 - Upper cover closing mechanism; 34 - Locking buckle folding mechanism; 341 - Locking buckle folding cylinder; 342 - First support piece; 343 - Fifth guide rod; 344 - Third guide rod; 35 - Insert locking buckle mechanism; 351 - Insert locking buckle cylinder; 352 - Second support piece; 353 - Sixth guide rod; 36 - Second height adjustment structure; 361 - Sliding plate; 3611 - Slot; 362 - Height adjustment support block; 363 - Height adjustment screw; 364 - Height adjustment nut block; 365 - Fixed piece; 366 - Mounting plate;

[0051] 4 - Positioning device. Detailed implementation mode

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0055] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0056] The carton packaging machine provided by the embodiments of the present invention will now be described. The carton packaging machine is used to fold cartons. Please refer to Figure 1 , when the carton 100 comes in, it is in a flat plate shape. The carton 100 includes a first side plate 010, a second side plate 020, a third side plate 030, and a fourth side plate 040 that are connected end to end. After the carton 100 is opened, the first side plate 010, the second side plate 020, the third side plate 030, and the fourth side plate 040 enclose a quadrilateral and form a cavity for placing products. The lower end of the carton 100 has a first lower sub-cover 051, a second lower sub-cover 052, a lower main cover 053, and a lower cover tongue 054. The first lower sub-cover 051 is connected to the lower end of the second side plate 020, and the second lower sub-cover 052 is connected to the lower end of the fourth side plate 040. After the carton 100 is opened, the first lower sub-cover 051 and the second lower sub-cover 052 are respectively disposed on opposite sides of the opening of the carton 100 and are used to cover the opening after folding. The lower main cover 053 is connected to the third side plate 030, and the lower cover tongue 054 is connected to the lower main cover 053. After the first lower sub-cover 051 and the second lower sub-cover 052 are folded towards the opening, the lower cover tongue 054 is first folded so that the lower cover tongue 054 is bent relative to the lower main cover 053, and then the lower main cover 053 is folded towards the opening to cover the opening, and the lower cover tongue 054 is inserted into the cavity of the carton 100. The upper end of the carton 100 has a first upper sub-cover 061, a second upper sub-cover 062, an upper main cover 063, an upper cover tongue 064, a bending portion 066, and a lock 067. The first upper sub-cover 061 is connected to the upper end of the second side plate 020, the second upper sub-cover 062 is connected to the upper end of the fourth side plate 040, the upper main cover 063 is connected to the upper end of the first side plate 010, the upper cover tongue 064 is connected to the upper main cover 063, a jack 065 is provided at the connection of the upper main cover 063 and the upper cover tongue 064, the bending portion 066 is connected to the upper end of the third side plate 030, and the lock 067 is connected to the bending portion 066. The setting of the bending portion 066 enables the lock 067 to have sufficient movement space relative to the third side plate 030 so that the lock 067 can be smoothly inserted into the jack 065.

[0057] In one embodiment of the present invention, please refer to Figure 2 , Figure 3 and Figure 14, the carton packaging machine includes a lower cover folding device 1, a carton transportation device 2, an upper cover folding device 3, and a positioning device 4. The carton 100 is in a flat shape when it comes in. When the lower cover folding device 1 opens the carton 100, folds the first lower sub-cover 051, the second lower sub-cover 052, and the lower cover tongue 054, and closes the lower main cover 053, the lower end of the carton 100 has been folded. Then it will move to the carton transportation device 2. During the transportation of the carton 100, the product is placed in the cavity of the carton 100. After the product is placed, the upper cover folding device 3 folds the first upper sub-cover 061, the second upper sub-cover 062, and the upper cover tongue 064, then closes the upper main cover 063, folds the lock catch 067, and finally inserts the lock catch 067 into the jack 065. In this way, the automatic folding of the carton 100 is completed. Among them, the lower cover folding device 1 includes an opening mechanism 12, a lower flap mechanism 13, a tongue folding and closing mechanism 14, a lower flap mechanism 13, and a transfer mechanism 15. The opening mechanism 12 is used to unfold the flat carton 100 into a three-dimensional shape. The lower flap mechanism 13 is used to flap the first lower sub-cover 051 so that the first lower sub-cover 051 folds relative to the second side plate 020, and is also used to flap the second lower sub-cover 052 so that the second lower sub-cover 052 folds relative to the fourth side plate 040. The tongue folding and closing mechanism 14 is used to fold the lower cover tongue 054 and cover the lower main cover 053 on the opening of the carton 100, and the lower cover tongue 054 is inserted into the cavity of the carton 100. The transfer mechanism 15 is used to move the carton 100, and can move the opened carton 100 from the lower flap mechanism 13 to the tongue folding and closing mechanism 14, and can also move the carton 100 at the tongue folding and closing mechanism 14 to the carton transportation device 2. The upper cover folding device 3 includes an upper flap mechanism 31, an upper tongue folding mechanism 32, an upper closing mechanism 33, a lock catch folding mechanism 34, and a lock catch inserting mechanism 35, and the upper flap mechanism 31, the upper tongue folding mechanism 32, the upper closing mechanism 33, the lock catch folding mechanism 34, and the lock catch inserting mechanism 35 are all arranged above the carton transportation device 2, and can flap the cover during the transportation of the carton 100. When folding the upper cover tongue 064, closing the upper main cover 063, folding the lock catch 067, and inserting the lock catch 067, the carton 100 can be temporarily stopped on the carton transportation device 2 through the positioning device 4 to facilitate the above actions.

[0058] The carton packaging machine in the above embodiments includes a lower cover folding device 1, a carton transportation device 2, an upper cover folding device 3, and a positioning device 4. The lower cover folding device 1 can unfold the carton 100 into a three-dimensional shape through the box opening mechanism 12, perform flap folding on the first lower sub-cover 051 and the second lower sub-cover 052 through the lower flap mechanism 13, and perform tongue folding and closing actions through the tongue folding and closing mechanism 14. After the lower cover of the carton 100 is folded, it is moved to the carton transportation device 2 through the transfer mechanism 15. During the transportation of the carton 100, products can be placed in the carton 100, and then the upper cover is folded at the upper cover folding device 3. Specifically, the upper flap mechanism 31 performs flap folding on the first upper sub-cover 061 and the second upper sub-cover 062, the upper tongue folding mechanism 32 folds the upper cover tongue 064, the upper cover closing mechanism 33 closes the upper main cover 063, and the locking buckle 067 is inserted into the insertion hole 065 through the folding locking buckle mechanism 34 and the insertion locking buckle mechanism 35.

[0059] In one embodiment of the present invention, please refer to Figure 5 and Figure 6 , the box opening mechanism 12 includes a first adsorption component 121 and a positioning push plate 122. The first adsorption component 121 is used to adsorb the first side plate 010. When the first side plate 010 is fixed, the second side plate 020 is pushed by the positioning push plate 122 so that the first side plate 010 and the second side plate 020 form a 90° angle, thereby realizing the box opening action. Optionally, the first adsorption component 121 includes a box opening cylinder 1211 and a first suction cup 1213. The first suction cup 1213 is connected to the moving end of the box opening cylinder 1211, enabling the first suction cup 1213 to move between the storage location of the carton 100 and the positioning push plate 122. In this way, when the box opening action needs to be performed on the carton 100, first, the box opening cylinder 1211 moves the first suction cup 1213 to the storage location of the carton 100 to adsorb the flat carton 100, and then moves to the positioning push plate 122. The positioning push plate 122 pushes the second side plate 020 of the carton 100, making the first side plate 010 and the second side plate 020 perpendicular to each other. Among them, the positioning push plate 122 can be fixed on the following second adsorption component 131 or can be fixed at other positions (not moving with the second adsorption component 131), and the fixing position of the positioning push plate 122 is not limited here. The setting of the box opening cylinder 1211 enables the first suction cup 1213 to not only pick up materials from the storage location of the carton 100 but also cooperate with the positioning push plate 122 to perform the box opening action, enabling the box opening cylinder 1211 to achieve two functions and indirectly simplifying the structure of the carton packaging machine.

[0060] Optionally, the moving end of the box opening cylinder 1211 is connected to a first suction cup holder 1212, and the first suction cup 1213 is fixed on the first suction cup holder 1212. The number and distribution of the first suction cups 1213 are not limited here, as long as they can stably adsorb the first side plate 010 of the carton 100.

[0061] In another embodiment of the present invention, the first adsorption assembly 121 includes a first suction cup 1213. The positioning push plate 122 is driven to move by a linear driving member such as a cylinder. The first suction cup 1213 is used to adsorb the first side plate 010 of the paper box 100. The positioning push plate 122 pushes the second side plate 020 of the paper box 100 under the action of the linear driving member, and the box opening action can also be completed.

[0062] In one embodiment of the present invention, please refer to Figure 3 and Figure 4 , a paper box storage mechanism 11 is provided at the paper box 100 storage place. The flat paper boxes 100 are stacked in the paper box storage mechanism 11 for the first adsorption assembly 121 to pick up. Optionally, the paper box storage mechanism 11 includes a storage box 111, a front stop 112, a rear baffle 113 and an elastic member. The paper boxes 100 are stacked in the storage box 111. The flat paper boxes 100 can be placed vertically relative to the bottom wall of the storage box 111, and the paper boxes 100 are clamped between the front stop 112 and the rear baffle 113. The two ends of the elastic member are respectively connected to the storage box 111 and the rear baffle 113. Under the action of the elastic member, the rear baffle 113 presses the stacked paper boxes 100 tightly. The first adsorption assembly 121 sucks the paper box 100 from the front stop 112. After each paper box 100 is sucked, the elastic member retracts by the thickness of one paper box 100 and continues to press the remaining paper boxes 100 tightly. The front stop 112 can be in the shape of a block, a column, etc., and only covers a part of the surface of the paper box 100, facilitating the first adsorption assembly 121 to take away the paper box 100. More specifically, the front stop 112 covers the first lower sub-cover 051 or the second lower sub-cover 052 of the paper box 100. In this way, when the first adsorption assembly 121 adsorbs the first side plate 010 of the paper box 100 and moves the paper box 100, the first lower sub-cover 051 or the second lower sub-cover 052 can be pushed by the front stop 112 to fold, so as to avoid the front stop 112 and enable the paper box 100 to be taken out from the storage box 111.

[0063] Optionally, the carton storage mechanism 11 further includes a width adjustment structure 114 and a first height adjustment structure 115. The width adjustment structure 114 is used to adjust the width of the storage box 111, and the first height adjustment structure 115 is used to adjust the height of the storage box 111. Wherein, the storage box 111 can be inclined so that the discharge end of the storage box 111 is lower than the storage end of the storage box 111, so that the carton 100 has a tendency to slide downward under the action of gravity. The storage box 111 includes a first material box 1111 and a second material box 1112 that are separately arranged. The first material box 1111 and the second material box 1112 can both be L-shaped. The specific structures of the first material box 1111 and the second material box 1112 are not limited here, as long as they can be combined to form a cavity for accommodating the carton 100. The width adjustment structure 114 includes a width adjustment screw 1142, a width adjustment support seat 1141, a width adjustment slider 1144, and a width guide rod 1143. The width adjustment support seat 1141 is used to support the width adjustment screw 1142. The width adjustment slider 1144 is threadedly connected to the width adjustment screw 1142. The width guide rod 1143 is fixed to the width adjustment support seat 1141 and slidably connected to the width adjustment slider 1144 for guiding the width adjustment slider 1144 to move linearly. The first material box 1111 is fixed to the width adjustment support seat 1141, and the second material box 1112 is fixed to the width adjustment slider 1144. When the width adjustment screw 1142 is rotated, the width adjustment slider 1144 and the second material box 1112 move synchronously, so that the width of the storage box 111 can be adjusted, and cartons 100 of different widths can be stored. The number of the first height adjustment structures 115 is two. One of the first height adjustment structures 115 is used to adjust the height of the first material box 1111, and the other first height adjustment structure 115 is used to adjust the height of the second material box 1112. The first height adjustment structure 115 includes a height adjustment column 1151, a height adjustment slider 1152, a gasket 1154, and a slider locking member 1153. In the first height adjustment structure 115 for adjusting the height of the first material box 1111, one end of the height adjustment column 1151 is fixed to the width adjustment support seat 1141, and the other end is fixed to the first material box 1111. The height adjustment slider 1152 is slidably connected to the height adjustment column 1151. The gasket 1154 is disposed between the width adjustment support seat 1141 and the height adjustment slider 1152. The slider locking member 1153 passes through the height adjustment slider 1152 and presses the gasket 1154 tightly.In the first height adjustment structure 115 for adjusting the height of the second magazine 1112, one end of a height adjustment column 1151 is fixed to the width adjustment slider 1144, and the other end is fixed to the second magazine 1112. The height adjustment slider 1152 is slidably connected to the height adjustment column 1151. A gasket 1154 is placed between the width adjustment slider 1144 and the height adjustment slider 1152. The slider locking member 1153 passes through the height adjustment slider 1152 and presses the gasket 1154. By adjusting the number of gaskets 1154, the height of the first magazine 1111 and the second magazine 1112 can be adjusted, making the paper box storage mechanism 11 suitable for paper boxes 100 of different heights.

[0064] In one embodiment of the present invention, see Figures 6 to 8 The lower cover swing mechanism 13 includes a second suction component 131, a lower cover swing cylinder 132, and a guide plate 133. The second suction component 131 is used to suck the first side panel 010 after the box is opened. The lower cover swing cylinder 132 is used to push the first lower cover 051, causing the first lower cover 051 to bend relative to the second side panel 020, completing the swinging action of the first lower cover 051. The guide plate 133 is used to push the second lower sub-cover 052, causing the second lower sub-cover 052 to bend relative to the fourth side panel 040. More specifically, the second suction component 131 is connected to the moving end of the transfer mechanism 15 and can drive the paper box 100 to move under the action of the transfer mechanism 15. In this way, during the movement of the paper box 100, the guide plate 133 can push the second lower sub-cover 052, completing the swinging action of the second lower sub-cover 052.

[0065] Optionally, see Figure 7 and Figure 8 The second suction assembly 131 includes a second suction cup frame 1311 and a second suction cup 1312. The second suction cup frame 1311 is fixed to the moving end of the transfer mechanism 15, and the second suction cups 1312 are fixed to the second suction cup frame 1311. The number and distribution of the second suction cups 1312 are not limited herein. The suction surfaces of the first suction cup 1213 and the second suction cup 1312 are arranged parallel to or overlap each other. More specifically, when the first suction cup 1213 is located at the storage location of the paper box 100 to pick up materials, the first suction cup 1213 and the second suction cup 1312 are staggered, and the adsorption surface of the first suction cup 1213 and the adsorption surface of the second suction cup 1312 are parallel to each other. After the first suction cup 1213 picks up materials, it moves to be flush with the second suction cup 1312 (that is, the adsorption surface of the first suction cup 1213 and the adsorption surface of the second suction cup 1312 coincide with each other). In this way, after the paper box 100 is opened, the first side panel 010 of the paper box 100 can be adsorbed by the second suction cup 1312, thereby transferring the paper box 100 to the lower cover mechanism 13, so that the paper box 100 can be translated with the second adsorption component 131, thereby completing the cover swinging action of the second lower sub-cover 052.

[0066] Optionally, the positioning push plate 122 and the lower swing cover cylinder 132 are fixed to the same end of the second suction cup holder 1311. Since the positioning push plate 122 is used to push the second side plate 020, and the lower swing cover cylinder 132 is used to push the first lower sub-cover 051, and the first lower sub-cover 051 is connected to the second side plate 020, therefore, the positioning push plate 122 and the lower swing cover cylinder 132 are fixed to the same end of the second suction cup holder 1311, which is convenient for matching the positions of the second side plate 020 and the first lower sub-cover 051. In other embodiments, the lower swing cover cylinder 132 can also be directly fixed on the workbench and does not move with the second suction assembly 131.

[0067] In one embodiment of the present invention, please refer to Figure 7 and Figure 8 ., a side plate positioning cylinder 134 is further fixed to the moving end of the transfer mechanism 15. The side plate positioning cylinder 134 is used to position the fourth side plate 040, so that when the paper box 100 moves with the second suction assembly 131, it is more stable and the phenomenon that the paper box 100 retracts after the box is opened will not occur. In this embodiment, when the positioning push plate 122 is fixed to the second suction cup holder 1311, the positioning push plate 122 and the side plate positioning cylinder 134 are respectively arranged on the opposite sides of the paper box 100, that is, the positioning push plate 122 is arranged at the second side plate 020, and the side plate positioning cylinder 134 is arranged at the fourth side plate 040, and the two opposite side faces of the paper box 100 are respectively abutted and positioned. More specifically, after the lower swing cover cylinder 132 swings the first lower sub-cover 051, the second suction cup 1312 still adsorbs the first side plate 010, and the transfer mechanism 15 works to move the second suction cup 1312 and the paper box 100 thereon. At this time, the side plate positioning cylinder 134 extends, and its moving end abuts against the fourth side plate 040 to position the fourth side plate 040. Moreover, the outer side surface of the second lower sub-cover 052 is arranged facing the guide plate 133. When the paper box 100 approaches the guide plate 133, the guide plate 133 pushes the second lower sub-cover 052, so that the second lower sub-cover 052 is bent relative to the fourth side plate 040 to complete the swing cover action of the second lower sub-cover 052. Optionally, the guide plate 133 is inclined with respect to the moving direction of the moving end of the transfer mechanism 15.

[0068] Among them, the transfer mechanism 15 itself has the function of moving the paper box 100, and also has the function of driving the paper box 100 to complete the swing cover of the second lower sub-cover 052, which also enables the transfer mechanism 15 to undertake more functions, eliminating the need to additionally set a cylinder to push the second lower sub-cover 052 and simplifying the structure of the lower cover folding device 1.

[0069] In one embodiment of the present invention, please refer to Figure 7 and Figure 8, the lower cover folding device 1 further includes a guide rod 153 and a main cover positioning cylinder 135. The guide rod 153 is used to bend the lower main cover 053 relative to the third side plate 030, facilitating the main cover positioning cylinder 135 to push and position the lower main cover 053. More specifically, when the transfer mechanism 15 drives the paper box 100 to move, the guide rod 153 can push the lower main cover 053 to bend the lower main cover 053 at a certain angle relative to the third side plate 030, facilitating the movement end of the lower main cover 053 to be directly opposite to the main cover positioning cylinder 135, so that the main cover positioning cylinder 135 can push the lower main cover 053 to prevent the lower main cover 053 from shaking during the movement of the paper box 100. The main cover positioning cylinder 135 can be fixed on the second adsorption component 131 and move synchronously with the paper box 100.

[0070] In one embodiment of the present invention, please refer to Figure 6 and Figure 7 , a third adsorption component 452 is further fixed to the movement end of the transfer mechanism 15. The third adsorption component 452 moves synchronously with the second adsorption component 131. The third adsorption component 452 is used to adsorb the paper box 100 after the flaps are folded (both the first lower sub-cover 051 and the second lower sub-cover 052 have been folded). The third adsorption component 452 includes a transfer cylinder 1521 and a third suction cup 1522. The third suction cup 1522 is connected to the movement end of the transfer cylinder 1521. The moving direction of the transfer cylinder 1521 is perpendicular to the moving direction of the movement end of the transfer mechanism 15. When it is necessary to adsorb the paper box 100 after the flaps are folded, the third suction cup 1522 is moved to make its adsorption surface flush with the first side plate 010. When adsorption is not required, the third suction cup 1522 is retracted to prevent interference with the next paper box 100 moving to the position of the third suction cup 1522. The setting of the third adsorption component 452 is used to move the paper box 100 after opening the box, folding the lower flaps, folding the lower tongues, and closing the lower cover to the next working station. More specifically, when the paper box 100 at the second adsorption component 131 is folding the first lower sub-cover 051, the paper box 100 at the third adsorption component 452 is performing the tongue folding and cover closing actions. After the folding actions at both adsorption components are completed, the transfer mechanism 15 operates to transfer the paper box 100 after the flaps are folded to the tongue folding and cover closing mechanism 14 (at this time, the folding and cover closing mechanism is directly opposite to the third adsorption component 452) under the action of the second adsorption component 131. Correspondingly, the paper box 100 that has been tongue folded and cover closed at the tongue folding and cover closing mechanism 14 is moved to the paper box transportation device 2.

[0071] Optionally, please refer to Figure 7 , a transfer rack 151 is fixed to the movement end of the transfer mechanism 15. Both the second adsorption component 131 and the third adsorption component 452 are fixed on the transfer rack 151 to make the second adsorption component 131 and the third adsorption component 452 move synchronously. The second adsorption component 131 and the third adsorption component 452 are arranged at intervals in sequence along the moving direction of the movement end of the transfer mechanism 15.

[0072] Optionally, the transfer mechanism 15 is any existing mechanism capable of outputting linear motion. For example, the transfer mechanism 15 includes a motor and a belt assembly driven by the motor, and the transfer frame 151 is fixed to the belt of the belt assembly, so that the transfer frame 151 can drive the second adsorption assembly 131 and the third adsorption assembly 452 to move linearly.

[0073] In one embodiment of the present invention, please refer to Figure 9 , the tongue-folding and lid-closing mechanism 14 includes a paper box fixing mechanism 141, a lower tongue-folding mechanism 142, a main lid support mechanism 143, and a lower lid-closing mechanism 144. The paper box fixing mechanism 141 is used to receive the paper box 100 transported by the transfer mechanism 15 on the second suction cup 1312, and fix the paper box 100, facilitating subsequent tongue-folding and lid-closing operations on the paper box 100. The lower tongue-folding mechanism 142 is used to push the lower lid tongue 054, so that the lower lid tongue 054 bends relative to the lower main lid 053. During the tongue-folding process, the main lid support mechanism 143 supports the lower main lid 053 to prevent the lower main lid 053 from shaking when the lower lid tongue 054 is folded. After the lower lid tongue 054 is folded, the lower lid-closing mechanism 144 pushes the lower main lid 053, so that the lower main lid 053 covers the opening of the paper box 100, and the lower lid tongue 054 is inserted into the cavity of the paper box 100, that is, inserted between the two lower sub-lids and the first side plate 010.

[0074] In one embodiment of the present invention, please refer to Figure 9 and Figure 10 , the paper box fixing mechanism 141 includes a paper box positioning cylinder 1411 and a positioning suction cup 1412. The positioning suction cup 1412 is connected to the moving end of the paper box positioning cylinder 1411, and the positioning suction cup 1412 is used to adsorb one side plate of the paper box 100. Specifically, after the paper box 100 is opened and the lid is shaken, the paper box 100 adsorbed on the second suction cup 1312 (the second suction cup 1312 adsorbs the first side plate 010 of the paper box 100) moves to the paper box fixing mechanism 141 through the transfer mechanism 15, and one side plate of the paper box 100 is adsorbed by the positioning suction cup 1412 to position the paper box 100. Among them, the positioning suction cup 1412 can adsorb one of the second side plate 020, the third side plate 030, and the fourth side plate 040, and the specific side plate adsorbed by the positioning suction cup 1412 is not limited here. The paper box positioning cylinder 1411 is used to control the movement of the positioning suction cup 1412. When the paper box 100 moves to the paper box fixing mechanism 141, the paper box positioning cylinder 1411 moves the positioning suction cup 1412 to the side plate of the paper box 100 to adsorb the paper box 100. The number and distribution of the positioning suction cups 1412 are not limited here.

[0075] Optionally, the carton fixing mechanism 141 includes a carton positioning cylinder 1411 and a positioning suction cup 1412, and further includes a positioning plate 1413. The function of the positioning plate 1413 is to position one side plate of the carton 100. Further, the side plate positioned by the positioning plate 1413 is adjacent to the side plate adsorbed by the positioning suction cup 1412, so that two side plates of the carton 100 are positioned, and the carton 100 can be prevented from shaking. Wherein, the positioning plate 1413 is used to abut against the surface of the side plate of the carton 100, which is set as a positioning surface 14131. The positioning surface 14131 is perpendicular to the adsorption surface of the positioning suction cup 1412, so that the side plate abutted by the positioning plate 1413 is adjacent to the side plate adsorbed by the positioning suction cup 1412.

[0076] Optionally, the positioning surface 14131 is used to abut against the third side plate 030, and the positioning suction cup 1412 is used to adsorb the fourth side plate 040. Since the lower main cover 053 is connected to the third side plate 030, the lower main cover 053 is subjected to acting forces during the tongue folding and lid closing processes. Therefore, the positioning surface 14131 abuts against the third side plate 030, which can ensure the stability of the entire carton 100 when the lower main cover 053 moves. In addition, the third side plate 030 to which the lower main cover 053 is connected is the long side of the opening at the opening. Compared with the fourth side plate 040 or the second side plate 020 with a short side abutting against the positioning plate 1413, the stability is better when the positioning surface 14131 abuts against the third side plate 030. In other embodiments, the positioning plate 1413 abuts against the second side plate 020 or the fourth side plate 040, and the positioning suction cup 1412 is used to adsorb the third side plate 030.

[0077] In one embodiment of the present invention, please refer to Figure 11 , the carton fixing mechanism 141 further includes a horizontal adjustment structure 1414 and a vertical adjustment structure 1415. The horizontal adjustment structure 1414 is used to adjust the horizontal position of the carton fixing mechanism 141, so that the width distance between the carton fixing mechanism 141 and the transfer mechanism 15 can be adjusted, and thus it can be applicable to cartons 100 with different widths. The vertical adjustment structure 1415 is used to adjust the vertical position of the carton fixing mechanism 141, and thus it can be applicable to cartons 100 with different heights. The horizontal adjustment structure 1414, the vertical adjustment structure 1415 and the positioning plate 1413 of the carton fixing mechanism 141 are connected in sequence, so that the position of the carton fixing mechanism 141 in the horizontal and vertical directions is adjustable.

[0078] Optionally, please refer to Figure 11, the horizontal adjustment structure 1414 includes a horizontal adjustment support base 14141, a rotating screw 14142, a nut holder 14143, and a slide rail 14144. The horizontal adjustment support base 14141 is fixedly arranged and can be fixed on the workbench. The rotating screw 14142 is passed through the horizontal adjustment support base 14141, and the horizontal adjustment support base 14141 supports the rotating screw 14142. The nut holder 14143 is threadedly connected to the rotating screw 14142, and the nut holder 14143 is slidably connected to the slide rail 14144. When the rotating screw 14142 rotates, the nut holder 14143 moves under the guidance of the slide rail 14144, so that the positioning plate 1413 moves in the horizontal direction, and further adjusts the position of the positioning plate 1413, so that the distance between the carton fixing mechanism 141 and the second adsorption component 131 in the width direction of the carton 100 changes, and it can be applicable to cartons 100 of various widths. The number of slide rails 14144 can be selected as two, making the movement of the nut holder 14143 more stable.

[0079] Optionally, please refer to Figure 11 , the vertical adjustment structure 1415 includes a vertical adjustment column 14151, a vertical adjustment slider 14152, and a height locking member 14153. The vertical adjustment column 14151 is fixed on the nut holder 14143 and can move synchronously with the nut holder 14143. The vertical adjustment slider 14152 is sleeved on the vertical adjustment column 14151 and can slide up and down along the vertical adjustment column 14151. The height locking member 14153 is used to fix the vertical adjustment slider 14152 on the vertical adjustment column 14151, and the vertical adjustment slider 14152 is fixedly connected to the positioning plate 1413. When the position of the vertical adjustment slider 14152 changes, the position of the positioning plate 1413 also changes accordingly, so that the carton fixing mechanism 141 can be adapted to cartons 100 of different heights. When it is necessary to adjust the height of the positioning plate 1413, loosen the height locking member 14153, so that the vertical adjustment slider 14152 slides along the vertical adjustment column 14151. When the vertical adjustment slider 14152 moves to the corresponding position, the height locking member 14153 locks the vertical adjustment slider 14152 on the vertical adjustment column 14151. More specifically, the vertical adjustment slider 14152 can be an open ring, and the height locking member 14153 can be a threaded member. When the threaded member is locked, the inner diameter of the open ring decreases, so that the open ring can be clamped on the vertical adjustment column 14151.

[0080] In one embodiment of the present invention, please refer to Figure 11, the lower tongue folding mechanism 142 includes a lower tongue folding cylinder 1421 and a lower tongue folding push plate 1422 connected to the moving end of the lower tongue folding cylinder 1421. The lower tongue folding push plate 1422 is used to push the lower cover tongue 054 to bend the lower cover tongue 054 relative to the lower main cover 053, thereby realizing the tongue folding action. However, in order for the lower main cover 053 not to move during tongue folding, it is necessary to stop the lower main cover 053 through the main cover support mechanism 143. More specifically, please refer to Figure 13 , the main cover support mechanism 143 includes a support cylinder 1431 and a support rod 1432. The support rod 1432 is connected to the moving end of the support cylinder 1431. When it is necessary to stop the lower main cover 053, the support cylinder 1431 extends the support rod 1432 and inserts it between the lower main cover 053 and the opening of the paper box 100 to prevent the lower main cover 053 from moving towards the opening of the paper box 100 during tongue folding. For example, when the lower main cover 053 and the lower cover tongue 054 are located below the opening of the paper box 100, the support rod 1432 extends above the lower main cover 053. When the lower cover tongue 054 moves upward during tongue folding, it will drive the lower main cover 053 to move upward. Therefore, the support rod 1432 can stop the upward movement of the lower main cover 053. The moving direction of the support rod 1432 is parallel to the joint line between the lower main cover 053 and the third side plate 030. Combining Figure 9 , the joint line between the lower main cover 053 and the third side plate 030 is horizontally arranged, and the moving direction of the support rod 1432 is also horizontal.

[0081] Optionally, please refer to Figure 13 , the main cover support mechanism 143 further includes two buffers 1433 respectively located at both ends of the stroke of the support rod 1432. The support cylinder 1431 includes a sliding frame 14311 and a driving block 14312 slidably connected to the sliding frame 14311. The support rod 1432 is fixed to the driving block 14312, and the two buffers 1433 are respectively fixed to both ends of the sliding frame 14311. The buffers 1433 can buffer the driving block 14312 to prevent the driving block 14312 from directly colliding with the end of the sliding frame 14311.

[0082] In one embodiment of the present invention, please refer to Figure 12 , the lower cover closing mechanism 144 includes a lower cover closing cylinder 1441 and a lower cover closing push plate 1442. The lower cover closing push plate 1442 is connected to the moving end of the lower cover closing cylinder 1441. When the lower cover closing cylinder 1441 operates, the lower cover closing push plate 1442 contacts the lower main cover 053, gradually brings the lower main cover 053 closer to the opening of the paper box 100, and inserts the lower cover tongue 054 into the opening of the paper box 100 to complete the cover closing action.

[0083] In one embodiment of the present invention, please refer to Figure 12, the lower tongue folding mechanism 142 and the lower lid closing mechanism 144 are arranged on the same side of the paper box 100. When the opening of the paper box 100 faces upward or downward, the lower tongue folding mechanism 142 and the lower lid closing mechanism 144 are respectively arranged on the upper side or the lower side of the paper box 100. The moving directions of the lower tongue folding mechanism 142 and the lower lid closing mechanism 144 are the same. For example, Figure 12 in, both the lower tongue folding mechanism 142 and the lower lid closing mechanism 144 move upward to respectively push against the lower lid tongue 054 and the lower main lid 053.

[0084] In one embodiment of the present invention, please refer to Figure 14 and Figure 15 , the paper box transporting device 2 includes two belt transmission mechanisms 21 arranged at intervals, and the distance between the two belt transmission mechanisms 21 can be adjusted by a lead screw mechanism 22. The paper box 100 is clamped between the two belt transmission mechanisms 21, and the paper box 100 is clamped by the belts of the two belt transmission mechanisms 21 to drive the paper box 100 to move. Since the distance between the two belt transmission mechanisms 21 is adjustable, the paper box transporting device 2 can be applicable to paper boxes 100 of different widths. Among them, the belt transmission mechanism 21 and the lead screw mechanism 22 are prior arts, and their specific structures will not be described in detail here.

[0085] In one embodiment of the present invention, please refer to Figure 3 , the positioning device 4 includes a lifting cylinder and a baffle, and the baffle is connected to the moving end of the lifting cylinder, and the baffle is driven by the lifting cylinder to move up and down. When the paper box 100 moves to the upper tongue folding mechanism 32, the upper lid closing mechanism 33, the folding lock mechanism 34 or the inserting lock mechanism 35, the lifting cylinder drives the baffle to rise to block the paper box 100, so that the paper box 100 cannot continue to move, thus preparing for closing the lid or inserting the lock 067.

[0086] It should be noted that the positioning device 4 can be arranged before the paper box 100 enters the upper lid folding device 3. When the paper box 100 moves to the positioning device 4, the positioning device 4 stops the paper box 100. At this time, the product is loaded into the paper box 100. After the product loading is completed, the positioning device 4 moves down to enable the paper box 100 to continue to move to the upper lid folding device 3.

[0087] In one embodiment of the present invention, please refer to Figure 16, the upper flap mechanism 31 includes an upper flap cylinder 311 and a first guide rod 313. The upper flap cylinder 311 is used to push the first upper sub-cover 061 so that the first upper sub-cover 061 folds relative to the second side plate 020, and the first guide rod 313 is used to push the second upper sub-cover 062 so that the second upper sub-cover 062 folds relative to the fourth side plate 040. The paper box 100 is placed on the paper box transportation device 2 for transportation. During the transportation of the paper box 100, the upper flap cylinder 311 pushes the first upper sub-cover 061 so that the first upper sub-cover 061 folds relative to the second side plate 020, realizing the flap action of the first upper sub-cover 061. In other embodiments, a positioning device 4 can also be provided at the upper flap cylinder 311 so that after the paper box 100 stays on the paper box transportation device 2, the upper flap cylinder 311 performs the flap action of the first upper sub-cover 061. After the first upper sub-cover 061 flaps, the paper box 100 continues to move with the paper box transportation device 2, and the first guide rod 313 can push the second upper sub-cover 062 so that the second upper sub-cover 062 folds relative to the fourth side plate 040, realizing the flap action of the second upper sub-cover 062.

[0088] Optionally, the upper flap cylinder 311 is a rotary cylinder capable of outputting a rotary motion. When the output end of the rotary cylinder rotates counterclockwise, the first upper sub-cover 061 can be pushed toward the opening of the paper box 100. Optionally, a push member 312 is connected to the output end of the rotary cylinder. The push member 312 is used to push one end of the first upper sub-cover 061 to be arrow-shaped, which can prevent the end of the push member 312 from getting stuck in the paper box 100 and ensure the stability of the flap action. In other embodiments, the upper flap cylinder 311 can also be a linear cylinder that pushes the first upper sub-cover 061 along a direction perpendicular to the second side plate 020, and the flap action of the first upper sub-cover 061 can also be realized.

[0089] In one embodiment of the present invention, please refer to Figure 16 and Figure 17 , the upper tongue folding mechanism 32 includes a second guide rod 321, an upper tongue folding cylinder 322, and a support plate 323. After the flaps are folded, the paper box 100 continues to move with the paper box transportation device 2. During the movement, the second guide rod 321 pushes the upper main cover 063 so that the upper main cover 063 folds relative to the first side plate 010, and the upper cover tongue 064 moves to be directly opposite to the upper tongue folding cylinder 322. When the paper box 100 moves to the position of the upper tongue folding cylinder 322 (the upper cover tongue 064 is directly opposite to the upper tongue folding cylinder 322), the positioning device 4 works to make the paper box 100 stay at the position of the upper tongue folding cylinder 322, preparing for the tongue folding action. When the upper tongue folding cylinder 322 pushes the upper cover tongue 064 to fold relative to the upper main cover 063, the support plate 323 supports the upper main cover 063 to realize the tongue folding action.

[0090] Optionally, the support plate 323 has an inclined surface 3231 and a vertical surface 3232. Specifically, after being pushed by the second guide rod 321, the upper main cover 063 is in an inclined state. The inclined surface 3231 is used to support the upper main cover 063, enabling the upper cover tongue 064 on the upper main cover 063 to be freely folded. When the upper tongue folding cylinder 322 pushes the upper cover tongue 064 downward, the upper cover tongue 064 folds relative to the upper main cover 063 until it is clamped in the gap formed by the moving end of the upper tongue folding cylinder 322 and the vertical surface 3232, making the upper cover tongue 064 vertically arranged, which is convenient for subsequent lid closing. It should be noted that the upper tongue folding cylinder 322 can also push the upper cover tongue 064 upward to achieve the tongue folding action. The pushing direction of the upper tongue folding cylinder 322 is related to the placement direction of the paper box 100, and the moving direction of the upper tongue folding cylinder 322 during tongue folding is not limited here.

[0091] In one embodiment of the present invention, please refer to Figure 16 , the upper tongue folding mechanism 32 further includes a fourth guide rod 324. The fourth guide rod 324 is used to stop the first upper sub - cover 061 and the second upper sub - cover 062, keeping the first upper sub - cover 061 and the second upper sub - cover 062 in the position after the flap is shaken, preventing the first upper sub - cover 061 and the second upper sub - cover 062 from rebounding and avoiding affecting subsequent tongue folding and lid closing actions.

[0092] In one embodiment of the present invention, please refer to Figure 18 , the upper lid closing mechanism 33 includes an upper lid closing cylinder. The upper lid closing cylinder can output linear motion, thereby being able to push the upper main cover 063, making the upper main cover 063 gradually approach and cover the opening of the paper box 100, and the upper cover tongue 064 is inserted into the inner cavity of the paper box 100. When the side plates of the paper box 100 are vertically arranged, the upper main cover 063 is in an inclined state before lid closing. Through the push of the upper lid closing cylinder, the upper main cover 063 is pushed to a horizontal state and covers the opening of the paper box 100. Correspondingly, the moving direction of the moving end of the upper lid closing cylinder is the vertical direction.

[0093] In one embodiment of the present invention, please refer to Figure and ​, the folding lock mechanism 34 includes a third guide rod 344, a folding lock cylinder 341, and a first support member 342. The third guide rod 344 is used to push the bent portion 066 so that the bent portion 066 folds relative to the third side plate 030. After the bent portion 066 folds, both the bent portion 066 and the lock 067 are in an inclined state. Among them, the third guide rod 344 can be arranged close to the upper swing cover mechanism 31 or close to the upper folding tongue mechanism 32. The specific position of the third guide rod 344 is not limited here. The folding lock cylinder 341 is used to push the lock 067 so that the lock 067 folds relative to the bent portion 066, preparing for the subsequent action of inserting the lock 067. The first support member 342 is used to support the bent portion 066 to prevent the bent portion 066 from moving after being affected by the force of the lock 067. More specifically, the first support member 342 is supported on the inner cavity side of the bent portion 066 facing the paper box 100, and the folding lock cylinder 341 pushes the lock 067 in the direction of the inner cavity of the paper box 100. When the side plates of the paper box 100 are vertically arranged, the lock 067 and the bent portion 066 are inclined before the folding lock 067 action. The first support member 342 is inserted between the bent portion 066 and the third side plate 030 as the paper box 100 moves. The moving end of the folding lock cylinder 341 moves horizontally to push the lock 067 to make the lock 067 in a nearly horizontal state. Among them, the first support member 342 can be in a long strip shape, and the cross-section of the first support member 342 is not limited here and can be circular, square, etc.

[0094] Optionally, the folding lock mechanism 34 further includes a fifth guide rod 343, and the fifth guide rod 343 is used to abut against the opening side of the upper main cover 063 facing away from the paper box 100, which can prevent the upper main cover 063 from rebounding.

[0095] In one embodiment of the present invention, please refer to ​ , the inserting lock mechanism 35 includes an inserting lock cylinder 351 and a second support member 352. The inserting lock cylinder 351 is used to push the bent portion 066. When the bent portion 066 moves, the lock 067 also moves towards the inner cavity of the paper box 100, so that the lock 067 is inserted into the cavity of the paper box 100. The second support member 352 is used to abut against the lock 067 to prevent the lock 067 from rebounding after folding, ensuring that when the bent portion 066 is pushed, the lock 067 can be aligned with the insertion hole 065 and smoothly inserted into the insertion hole 065. Among them, the second support member 352 can be in a long strip shape, and the cross-section of the second support member 352 is not limited here and can be circular, square, L-shaped, etc.

[0096] Optionally, the inserting lock mechanism 35 further includes a sixth guide rod 353, and the sixth guide rod 353 is used to abut against the opening side of the upper main cover 063 facing away from the paper box 100, which can prevent the upper main cover 063 from rebounding after closing the cover.

[0097] In one embodiment of the present invention, please refer to​ The carton transportation device 2 has a tongue folding station, a lid closing station, and a lock buckle inserting station. Positioning devices 4 are provided at the tongue folding station, the lid closing station, and the lock buckle inserting station, so that the carton 100 can stay at the tongue folding station for tongue folding, the carton 100 can stay at the lid closing station for lid closing, and the carton 100 can stay at the lock buckle inserting station for lock buckle insertion 067. The upper tongue folding mechanism 32 is provided at the tongue folding station, the upper lid closing mechanism 33 and the lock buckle folding mechanism 34 are both provided at the lid closing station, and the lock buckle inserting mechanism 35 is provided at the lock buckle inserting station. When the upper lid closing mechanism 33 and the lock buckle folding mechanism 34 are both provided at the lid closing station, for the same carton 100, the lid closing action and the lock buckle folding action can be carried out simultaneously, which can shorten the length of the carton transportation device 2 and improve the working efficiency. In other embodiments, the upper lid closing mechanism 33 and the lock buckle folding mechanism 34 can also be respectively arranged at different stations.

[0098] In one embodiment of the present invention, the upper lid folding device 3 further includes a second height adjustment structure 36. The upper flap mechanism 31, the upper tongue folding mechanism 32, the upper lid closing mechanism 33, the lock buckle folding mechanism 34, and the lock buckle inserting mechanism 35 are all connected to the second height adjustment structure 36, so that the heights of the upper flap mechanism 31, the upper tongue folding mechanism 32, the upper lid closing mechanism 33, the lock buckle folding mechanism 34, and the lock buckle inserting mechanism 35 can all be adjusted, and thus the upper lid folding device 3 is applicable to cartons 100 of various heights.

[0099] Optionally, the number of the second height adjustment structures 36 is one, and the upper flap mechanism 31, the upper tongue folding mechanism 32, the upper lid closing mechanism 33, the lock buckle folding mechanism 34, and the lock buckle inserting mechanism 35 are all connected to the second height adjustment structure 36. Or, the number of the second height adjustment structures 36 is five, and the upper flap mechanism 31, the upper tongue folding mechanism 32, the upper lid closing mechanism 33, the lock buckle folding mechanism 34, and the lock buckle inserting mechanism 35 are respectively connected to each second height adjustment structure 36. Or, the number of the second height adjustment structures 36 is three. The upper flap mechanism 31 and the upper tongue folding mechanism 32 are connected to the first second height adjustment structure 36, the upper lid closing mechanism 33 and the lock buckle folding mechanism 34 are connected to the second second height adjustment structure 36, and the lock buckle inserting mechanism 35 is connected to the third second height adjustment structure 36, which can simplify the structure of the upper lid folding device 3 and will not cause too many mechanisms installed on the second height adjustment structure 36 to affect the stability of each second height adjustment structure 36.

[0100] Optionally, please refer to ​, the second height adjustment structure 36 includes a sliding plate 361, a height adjustment support block 362, a height adjustment screw 363, a height adjustment nut block 364, a fixing member 365 and a mounting plate 366. The upper swing cover mechanism 31, the upper folding tongue mechanism 32, the upper closing cover mechanism 33, the folding lock mechanism 34 and the plug lock mechanism 35 are fixed on the corresponding mounting plate 366. The height adjustment support block 362 is fixed on the sliding plate 361. The height adjustment support block 362 is used to support the height adjustment screw 363. The height adjustment screw 363 passes through the height adjustment support block 362. The height adjustment nut block 364 is threadedly connected to the height adjustment screw 363. The sliding plate 361 is slidably connected to the mounting plate 366. When the height adjustment screw 363 rotates, the height adjustment nut block 364 thereon moves vertically. The height adjustment nut block 364 is fixedly connected to the mounting plate 366, so that the mechanism on the mounting plate 366 can move vertically. The fixing member 365 is used to fix the sliding plate 361 and the mounting plate 366. When the height needs to be adjusted, loosen the fixing member 365, rotate the height adjustment screw 363 to make the sliding plate 361 slide to the set position, and then the fixing member 365 locks the sliding plate 361 and the mounting plate 366.

[0101] Optionally, a slider is fixed on the sliding plate 361, and a slide rail is fixed on the mounting plate 366. The slider is slidably connected to the slide rail, so that the sliding plate 361 is slidably connected to the mounting plate 366.

[0102] Optionally, please refer to ​ , a strip hole 3611 is formed on the sliding plate 361. The fixing member 365 is a threaded member. The threaded member passes through the strip hole 3611 and is threadedly connected to the mounting plate 366 to realize the fixed connection between the sliding plate 361 and the mounting plate 366. The setting of the strip hole 3611 makes the screw hole on the mounting plate 366 always exposed within the range corresponding to the strip hole 3611. After the sliding plate 361 slides, the threaded member can still pass through the sliding plate 361 and be connected to the mounting plate 366.

[0103] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A carton packaging machine for folding cartons. The carton includes a first side plate, a second side plate, a third side plate, and a fourth side plate that are connected end to end in sequence. It also includes a first lower sub-cover connected to the lower end of the second side plate, a second lower sub-cover connected to the lower end of the fourth side plate, a lower main cover connected to the lower end of the third side plate, and a lower cover tongue connected to the lower main cover. It further includes a first upper sub-cover connected to the upper end of the second side plate, a second upper sub-cover connected to the upper end of the fourth side plate, an upper main cover connected to the upper end of the first side plate, an upper cover tongue connected to the upper main cover, a bending part connected to the upper end of the third side plate, and a lock connected to the bending part. There is a jack at the connection between the upper main cover and the upper cover tongue. The characteristics are as follows, The carton packaging machine includes: A lower cover folding device, including an unpacking mechanism for unfolding the flat carton into a three-dimensional carton, a lower flap folding mechanism for folding the first lower sub-cover and the second lower sub-cover, a tongue folding and closing mechanism for folding the lower cover tongue and pushing the lower main cover to close, and a transfer mechanism for moving the carton from the lower flap folding mechanism to the tongue folding and closing mechanism and for moving the carton from the tongue folding and closing mechanism to the carton transport device; The carton transport device, for receiving and transporting the carton from the transfer mechanism; An upper cover folding device, including an upper flap folding mechanism for folding the first upper sub-cover and the second upper sub-cover, an upper tongue folding mechanism for folding the upper cover tongue, an upper closing mechanism for pushing the upper main cover to close, a lock folding mechanism for pushing the lock to bend relative to the bent portion, and a lock inserting mechanism for pushing the bent portion so that the lock is inserted into the insertion hole. The upper flap folding mechanism, the upper tongue folding mechanism, the upper closing mechanism, the lock folding mechanism, and the lock inserting mechanism are all arranged above the carton transport device; the upper flap folding mechanism includes an upper flap folding cylinder for pushing the first upper sub-cover to fold relative to the second side plate and a first guide rod for pushing the second upper sub-cover to fold relative to the fourth side plate; the upper tongue folding mechanism includes a second guide rod for pushing the upper main cover to fold relative to the third side plate, an upper tongue folding cylinder for pushing the upper cover tongue to fold relative to the upper main cover, and a support plate for supporting the upper main cover during tongue folding; the support plate has an inclined surface and a vertical surface. After being pushed by the second guide rod, the upper main cover is in an inclined state. The inclined surface is used to support the upper main cover so that the upper cover tongue on the upper main cover can be freely folded. When the upper tongue folding cylinder pushes the upper cover tongue, the upper cover tongue folds relative to the upper main cover until it is clamped in the gap formed by the moving end of the upper tongue folding cylinder and the vertical surface, making the upper cover tongue vertically arranged; the upper cover folding device further includes a second height adjustment structure, and the upper flap folding mechanism, the upper tongue folding mechanism, the upper closing mechanism, the lock folding mechanism, and the lock inserting mechanism are all connected to the height adjustment structure; the carton transport mechanism includes two belt transport mechanisms arranged at intervals and a lead screw mechanism for adjusting the distance between the two belt transport mechanisms. The carton is clamped and transported by the belts of the two belt transport mechanisms; A plurality of positioning devices, arranged in sequence along the transport direction of the carton transport device, for stopping the carton on the carton transport device.

2. The carton packaging machine according to claim 1, characterized in that: The unpacking mechanism includes an unpacking cylinder, a first suction cup, and a positioning push plate for pushing the second side plate. The first suction cup is connected to the moving end of the unpacking cylinder, so that the first suction cup moves between the carton storage place and the positioning push plate.

3. The carton packaging machine according to claim 2, characterized in that: A side plate positioning cylinder for cooperating with the positioning push plate to clamp the carton is further fixed to the moving end of the transfer mechanism, and the moving end of the side plate positioning cylinder is used to abut against the fourth side plate.

4. The carton packaging machine according to claim 1, wherein: The lower cover folding device further includes a paper box storage mechanism, which includes a storage box for stacking and storing the paper boxes, a front stopper near the discharge end, a rear baffle cooperating with the front stopper to clamp the paper boxes, and an elastic member elastically connected between the rear baffle and the storage box.

5. The carton packaging machine according to claim 4, characterized in that: The paper box storage mechanism further includes a width adjustment structure for adjusting the width of the storage box and a first height adjustment structure for adjusting the height of the storage box.

6. The carton packaging machine according to claim 1, characterized in that: The lower swing cover mechanism includes a second suction cup for adsorbing the first side plate after opening the box, a lower swing cover cylinder for pushing the first lower sub-cover, and a guide plate for pushing the second lower sub-cover. The second suction cup is connected to the moving end of the transfer mechanism. When the paper box on the second suction cup moves, the second lower sub-cover bends relative to the fourth side plate under the push of the guide plate.

7. The carton packaging machine according to claim 6, wherein: The folding tongue closing cover mechanism includes a paper box fixing mechanism for receiving and fixing the paper box after swing covering from the second suction cup, a lower folding tongue mechanism for pushing the lower cover tongue to bend the lower cover tongue relative to the lower main cover, a main cover supporting mechanism for supporting on the lower main cover when bending the lower cover tongue, and a lower closing cover mechanism for pushing the lower main cover.

8. The carton packaging machine according to claim 7, characterized in that: The lower cover folding device further includes a horizontal adjustment structure for adjusting the horizontal position of the paper box fixing mechanism and a vertical adjustment structure for adjusting the vertical movement of the paper box fixing mechanism. The horizontal adjustment structure, the vertical adjustment structure and the paper box fixing mechanism are connected in sequence.

9. The carton packaging machine according to claim 1, characterized in that:

10. The carton packaging machine according to any one of claims 1-9, characterized in that: The lower cover folding device further includes a guide rod for bending the lower main cover relative to the third side plate and a main cover positioning cylinder for pushing and positioning the lower main cover after bending the lower main cover. The main cover positioning cylinder is fixed to the moving end of the transfer mechanism.

11. The carton packaging machine according to any one of claims 1-9, characterized in that: The folding lock buckle mechanism includes a third guide rod for folding the bending portion relative to the third side plate, a folding lock buckle cylinder for pushing the lock buckle to fold relative to the bending portion, and a first support member for supporting the bending portion.

12. The carton packaging machine according to any one of claims 1-9, characterized in that: The inserting lock buckle mechanism includes an inserting lock buckle cylinder for inserting the lock buckle into the jack and a second support member for preventing the lock buckle from rebounding.

13. The carton packaging machine according to any one of claims 1-9, characterized in that: The paper box transportation mechanism has a folding tongue station, a closing cover station and an inserting lock buckle station. The positioning device is provided at the folding tongue station, the closing cover station and the inserting lock buckle station. The upper folding tongue mechanism is provided at the folding tongue station, and the upper closing cover mechanism and the folding lock buckle mechanism are both provided at the closing cover station. The inserting lock buckle mechanism is provided at the inserting lock buckle station. The number of the height adjustment structures is three, and they are arranged in sequence along the transmission direction of the paper box transportation mechanism. The upper swing cover mechanism and the upper folding tongue mechanism are connected to the first height adjustment structure, the upper closing cover mechanism and the folding lock buckle mechanism are connected to the second height adjustment structure, and the inserting lock buckle mechanism is connected to the third height adjustment structure.

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