CN210525942U - Folding mechanism of box gluing machine - Google Patents

Abstract

The utility model provides a folding mechanism of a box gluing machine, which comprises a lower beam and an upper beam, a front section lower conveyer belt is wound on a plurality of belt wheels arranged at the front section of the lower beam, a whole section upper conveyer belt is wound on a plurality of belt wheels arranged at the whole section of the upper beam, a rear section adsorption device comprises a plurality of adsorption heads, a paperboard is adsorbed on the lower surface of the whole section upper conveyer belt through a plurality of adsorption heads, a forming device is arranged on each upper beam and positioned at the outer side of each adsorption head, the forming device comprises a mounting seat, a plurality of folding wheels, a folding wheel driving device, a folding knife, a folding rod and a folding belt, the mounting seat is arranged at the outer side of the upper beam, the plurality of folding wheels are rotatably arranged at the bottom surface of the mounting seat, the folding wheel driving device is arranged at, the folding knife is arranged on the lower beam, and the folding rod extends to the inner side of the lower beam from the outer side of the upper beam in a curve shape. This folding mechanism can reduce the rejection rate by a wide margin, improves the shaping quality of carton.

Description

Folding mechanism of box gluing machine

Technical Field

The utility model relates to a glue punch-out equipment, in particular to glue folding mechanism of punch-out equipment.

Background

Along with the development of science and technology, product packaging receives people's attention more and more as product production field an indispensable process, glues the case machine and compares the manual work as product packaging's important machinery, glues the case, has the advantage that production efficiency is high, low in production cost, extensively is arranged in the factory production. The box gluing machine is mechanical equipment used for gluing folding cartons in carton factories. The box gluing machine mainly comprises a paper feeding part, a gluing part, a folding mechanism and a counting and discharging part. The folding mechanism of the existing paper box sticking machine has the problems of high rejection rate and poor forming quality of the paper box due to the defects of structural design.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a glue folding mechanism of punch-out equipment, this glue folding mechanism of punch-out equipment can reduce the rejection rate by a wide margin, improves the shaping quality of carton.

The utility model relates to a technical solution:

a folding mechanism of a carton gluing machine is used for folding paperboards from two sides to a central plate part to enable the two side plate parts to be connected and bonded, the folding mechanism comprises two lower beams and two upper beams which are arranged on a supporting seat, each upper beam and each lower beam are arranged up and down correspondingly, one side of the front section of each lower beam, which faces to the other lower beam, is provided with a plurality of belt wheels at intervals along the conveying direction of the paperboards, a front section lower conveying belt is rotatably wound on the plurality of belt wheels of the front section of each lower beam, one side of the whole section of each upper beam, which faces to the other upper beam, is provided with a plurality of belt wheels at intervals along the conveying direction, a whole section of upper conveying belt is rotatably wound on the plurality of belt wheels of the whole section of each upper beam, the whole section of upper conveying belt is longer than the front section lower conveying belt, a gap for clamping the conveying paperboards is formed between the whole section of, a rear section adsorption device is arranged at one side of the rear section of each upper beam facing to the other upper beam, the rear section adsorption device comprises a plurality of adsorption heads for adsorbing a central plate part of a paperboard to the lower surface of the whole upper conveying belt and extending out of the whole upper conveying belt, a forming device is arranged at one side, namely the outer side, of each upper beam relative to each adsorption head and used for folding a side plate part connected with the central plate part from an obtuse angle to be overlapped with the central plate part, namely the folding angle between the side plate and the central plate part is changed from the obtuse angle to a zero angle, the forming device comprises a mounting seat, a plurality of folding wheels, a folding wheel driving device and a folding knife, the mounting seat is arranged at the outer side of the upper beam, the plurality of folding wheels are rotatably arranged at the bottom surface of the mounting seat, the folding wheel driving device is arranged at the top surface of the mounting seat and used for driving the plurality of folding wheels to rotate synchronously, each folding wheel, the inclination degree of the lower flange gradually tends to be straight, so that the widths of a plurality of folding wheel clamping grooves are gradually reduced along the conveying direction of the paper board, the folding knife is arranged on the top surface of the lower beam and extends along the same level with the edge of the front section lower conveying belt, the folding knife extends from the preset position of the front section lower conveying belt and extends to the starting end of the plurality of folding wheels, the thickness of the folding knife is gradually reduced along the arrangement direction of the plurality of folding wheels, the folding knife is matched with the clamping grooves of the folding wheels to gradually fold the paper board from an obtuse angle, the folding knife is abutted against the inner side of the folded angle of the paper board, the clamping grooves clamp the outer side of the folded angle of the paper board, the folding knife and the clamping grooves of each folding wheel form a folding gap, the clamping width of the folding gap is gradually narrowed along the conveying direction, the paper supply plate is gradually folded and formed in the folding gap, the folding knife further extends to a preset length at the starting end, the folding wheels at the tail ends can fold the folded paper board completely.

The forming device is provided with a mounting seat, a plurality of folding wheels, a folding wheel driving device and a folding knife, a paperboard is input from a paper feed end in a flat plate shape, under the guiding action of two folding rods, two opposite side plates of the paperboard are gradually folded downwards, when the two opposite side plates are folded into a certain obtuse angle, the paperboard starts to enter the folding wheels, under the action of the joint matching of the folding wheels and the folding knife on two sides, the guiding action of the two folding rods and the synchronous conveying action of a folding belt on the paperboard folding plates are matched, the two opposite side plates of the paperboard are gradually folded from opposite degrees to the plane coincidence of the two opposite side plates and an original paperboard, so that the thickness of the folding wheels is gradually reduced through the matching of the folding knife and the folding wheels, the folding knife is prevented from being smaller and smaller when being folded, and the folding gap is not enough, when the folding knife is not clamped at the last folding gap, the folding knife no longer prolongs there is length and folding wheel cooperation, only converts into cardboard lateral part and central plate portion through a plurality of folding wheels of tail end, so can accurately realize converting into, and, the utility model discloses in, cardboard central plate portion is because the back end of conveyer belt is not provided with the cooperation of conveyer belt under the back end on the whole section, so do not have two conveyer belts to hold the conveying mutually at the transport back end, only through the whole section on the conveyer belt attached at the top surface of cardboard central plate portion, adsorb the cardboard and transmit on the whole section on the conveyer belt through the adsorption head to realize folding wheel and folding knife and convert into at the transport back end to the accurate folding forming of cardboard. The forming process can greatly reduce the rejection rate and improve the forming quality of the carton and the stability of mechanical operation.

Drawings

Fig. 1 is an assembly structure view of a folding mechanism of the box gluing machine of the present invention;

FIG. 2 is an outside view of the folding mechanism of the box gluing machine of the present invention;

fig. 3 is an inside view of the folding mechanism of the box gluing machine of the present invention;

FIG. 4 is a first enlarged partial view of the front pressure adjustment device of the present invention;

FIG. 5 is a second enlarged partial view of the front section pressure adjustment device of the present invention;

fig. 6 is a first enlarged partial view of the rear pressure adjustment device of the present invention;

fig. 7 is a second enlarged partial view of the rear pressure adjustment device of the present invention;

fig. 8 is a three-dimensional structure view of the forming device of the folding mechanism of the box gluing machine of the present invention;

fig. 9 is a front view of the forming device of the folding mechanism of the box gluing machine of the present invention;

fig. 10 is a front view of the folding wheel of the forming device of the present invention;

FIG. 11 is a schematic view showing a first forming state of the paperboard of the present invention;

fig. 12 is a schematic view of the forming state of the paperboard of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, the present invention provides a folding mechanism of a box gluing machine, for folding paper boards from two sides to a central plate portion to connect the two side plate portions for realizing adhesion, the folding mechanism comprises two lower beams 2 and two upper beams 3 mounted on a supporting base 1, each upper beam 3 is disposed corresponding to each lower beam 2 up and down, a plurality of belt pulleys are disposed on one side of the front section of each lower beam 2 facing another lower beam 2 at intervals along the paper board conveying direction, a front section lower conveyer belt 4 is rotatably wound on the plurality of belt pulleys of the front section of each lower beam 2, a plurality of belt pulleys are disposed on one side of each upper beam 3 facing another upper beam 3 at intervals along the conveying direction, a whole section upper conveyer belt 5 is rotatably wound on the plurality of belt pulleys of the whole section of each upper beam 3, the whole section upper conveyer belt 5 is longer than the front section lower conveyer belt 4, a gap for holding the paper conveying board is formed between the whole section upper conveyer belt 5 and the front section lower conveyer, the back end of the whole upper conveying belt 5 is not provided with the cooperation of the back end lower conveying belt, the back end adsorption device is installed towards one side of another upper beam 3 at the back end of each upper beam 3, the back end adsorption device comprises a plurality of adsorption heads 6, the back end adsorption device is used for adsorbing the central plate part of the paperboard to the lower surface of the whole upper conveying belt 5 and the two side plate parts of the paperboard to stretch out of the whole upper conveying belt 5, the adsorption heads 6 are arranged at intervals along the back end of the whole upper conveying belt 5, a plurality of air vents are arranged on the whole upper conveying belt 5, and the lower surface of each adsorption head 6 is provided with an adsorption hole.

Referring to fig. 4 and 5, each upper beam 3 is provided with a pressure adjusting device for adjusting the pressure of the whole upper conveyor belt 5, the pressure adjusting device includes a front pressure adjusting device 7 and a rear pressure adjusting device 8, the front pressure adjusting device 7 includes a front adjusting rod 71, a plurality of front pressure assemblies 72, a front connecting rod, a front adjusting block 73, a front eccentric wheel 74 and a front adjusting motor 75, the front adjusting rod 71 is slidably mounted on the inner side of the front section of the upper beam 3 along the length direction of the front adjusting rod 71, the plurality of front pressure assemblies 72 are uniformly arranged along the length direction of the front adjusting rod 71, an adjusting opening is provided at the middle position of the front adjusting rod 71 on the upper beam 3, the front connecting rod is slidably inserted in the adjusting opening along the length direction of the front adjusting rod 71, the inner end of the front connecting rod is connected with the front adjusting rod 71, the outer end of the front connecting rod is connected with the front adjusting block 73, the front adjusting block 73, the front adjusting block 73 is provided with a strip-shaped hole, the front eccentric wheel 74 is rotatably arranged in the strip-shaped hole of the front adjusting block 73, the front adjusting motor 75 is fixed on the outer side surface of the upper beam 3, the output shaft of the front adjusting motor 75 is in transmission connection with the eccentric shaft of the front eccentric wheel 74, the front pressure assembly 72 comprises a bending arm 721, a rotating shaft 722, a rolling wheel 723, a fixing bolt 724, a tension spring 725, a first adjusting bolt 726 and a second adjusting bolt 727, the bending arm 721 is rotatably arranged on the inner side surface of the upper beam 3 through the rotating shaft 722, the rolling wheel 723 is rotatably arranged on the end part of the lower bending section of the bending arm 721, the fixing bolt 724 is fixed on the inner side surface of the upper beam 3, one end of the tension spring 725 is connected on the fixing bolt 724, the other end of the tension spring is connected on the end part of the upper bending section of the bending arm 721, the tension spring 725 has, so as to increase the friction between the front section of the whole upper conveyor belt 5 and the front section lower conveyor belt 4, the upper bending section of the bending arm 721 is provided with a screw hole, the first adjusting bolt 726 is screwed in the screw hole, the second adjusting bolt 727 is fixed on the front adjusting rod 71, and the nut end of the first adjusting bolt 726 abuts against the second adjusting bolt 727. The front adjusting rod 71 moves to drive the second adjusting bolt 727 to move, and the second adjusting bolt 727 pushes against the first adjusting bolt 726 to move, so that the bending arm 721 is driven to swing around the rotating shaft 722, and the pressure adjustment of the rolling wheel 723 on the pressing surface is realized.

The front eccentric wheel 74 is driven to rotate by the front adjusting motor 75, the front eccentric wheel 74 rotates to drive the front adjusting block 73 and the front adjusting rod 71 connected to the front adjusting block 73 to slide along the length direction of the front adjusting rod 71, when the front adjusting rod 71 slides along the paper feeding end direction, the second adjusting bolt 727 fixed on the front adjusting rod 71 pushes against the first adjusting bolt 726, so that the pressure of the rolling wheel 723 acting on the whole section of the upper conveying belt 5 is reduced, when the front adjusting rod 71 slides along the paper discharging end direction, the second adjusting bolt 727 fixed on the front adjusting rod 71 leaves the first adjusting bolt 726, the bending arm 721 rotates under the tension of the tension spring 725, and the pressure of the rolling wheel 723 acting on the whole section of the upper conveying belt 5 is increased.

The pressure adjusting device is matched with a front adjusting rod 71, a plurality of front pressure components 72, a front connecting rod, a front adjusting block 73, a front eccentric wheel 74 and a front adjusting motor 75 by the front pressure adjusting device 7, the front pressure components 72 are matched with a bending arm 721, a rotating shaft 722, a rolling wheel 723, a fixing bolt 724, a tension spring 725, a first adjusting bolt 726 and a second adjusting bolt 727 by the front pressure adjusting device 7, the structure is simple, the assembly and the maintenance are convenient, and by controlling the rotation of the front adjusting motor 75, the front adjusting rod 71 can be driven to slide, the sliding of the front adjusting rod 71 can simultaneously adjust the pressure of a plurality of front pressure components 72 acting on the whole segment of the upper conveying belt 5, the rotation of the front adjusting motor 75 can be controlled by inputting specified data through an input device, therefore, the pressure adjusting device is simple and convenient to operate, accurate in adjustment and beneficial to improving the forming quality of the carton.

In order to adjust the tension of the tension spring 725, the front section pressure adjusting device 7 further includes a tension spring adjusting rod 728 and a tension spring adjusting motor 729, the tension spring adjusting rod 728 is slidably mounted on the inner side surface of the front section of the upper beam 3 along the length direction of the tension spring adjusting rod 728, and the tension spring adjusting motor 729 is mounted on the outer side surface of the front section of the upper beam 3 and is used for driving the tension spring adjusting rod 728 to slide.

Referring to fig. 1, two lower beams 2 are mounted at the bottom of three support bases 1 with adjustable spacing, and two upper beams 3 are mounted at the top of three support bases 1 with adjustable spacing, so as to fold paper boards with different widths.

Two rolling wheels 723 are oppositely arranged at the end of the lower bending section of each bending arm 721 and are respectively arranged at two sides of each bending arm 721.

The outer end faces of the two rolling wheels 723 after the bending arms 721 are spaced at a predetermined number are formed with convex circles, the distance between the two convex circles is equal to the width of the whole upper conveying belt 5, and the whole upper conveying belt 5 can be slidably clamped between the two convex circles, so that a guiding effect is provided for the operation of the whole upper conveying belt 5, and the deviation of the whole upper conveying belt 5 is avoided.

Referring to fig. 6 and 7, the rear pressure adjusting device 8 includes a rear adjusting rod 81, a plurality of rear pressure assemblies 82, a rear connecting rod, a rear adjusting block 83, a rear eccentric wheel 84 and a rear adjusting motor 85, the rear adjusting rod 81 is slidably mounted on the inner side surface of the rear section of the upper beam 3 along the length direction of the rear adjusting rod 81, the plurality of rear pressure assemblies 82 are arranged at intervals along the length direction of the rear adjusting rod 81, a sliding hole is formed in the middle of the rear adjusting rod 81 on the upper beam 3, the rear connecting rod is slidably disposed in the sliding hole, the inner end of the rear connecting rod is connected with the rear adjusting rod 81, the outer end of the rear connecting rod is connected with the rear adjusting block 83, a waist-shaped hole is formed in the rear adjusting block 83, the rear eccentric wheel 84 is rotatably disposed in the waist-shaped hole, the rear adjusting motor 85 is fixed on the outer side surface of the upper beam 3, the output shaft of the rear adjusting motor 85, The pressure arm 821 is rotatably mounted on the inner side surface of the upper beam 3 through the pin shaft 822 and located below the rear adjusting rod 81, the hinge seat 823 is fixed on the adsorption head 6, a lower bending section of the pressure arm 821 is hinged to the hinge seat 823 through the hinge rod 824, the lower end of the pressure spring 825 is connected with the position, close to the hinge seat 823, on the adsorption head 6, the upper end of the pressure spring 825 is connected with the upper beam 3, the pressure spring 825 generates downward elastic force, the push block 826 is fixed on the rear adjusting rod 81, and a lower inclined surface of the push block 826 is abutted to the surface of the upper bending section of the pressure arm 821.

The rear eccentric wheel 84 is driven to rotate by the rear adjusting motor 85, the rear adjusting block 83 is driven to move by the rotation of the eccentric wheel 84, the rear adjusting block 83 is driven to slide by the rear connecting rod, the rear adjusting rod 81 is driven to slide by the rear adjusting rod 81, when the rear adjusting rod 81 slides towards the paper feeding end, the pushing block 826 drives the pressure arm 821 to rotate in the forward direction, the pressure acting on the adsorption head 6 is reduced, and when the rear adjusting rod 81 slides towards the paper discharging end, the pushing block 826 drives the pressure arm 821 to rotate in the reverse direction, and the pressure acting on the adsorption head 6 is increased.

Referring to fig. 1, the rear section adsorption device further includes a suction fan 61 and a suction hose 62, the suction fan 61 is mounted on the upper beam 3, and a suction opening of the suction fan 61 is communicated with the adsorption head 6 through the suction hose 62 to provide an upward adsorption force for the adsorption head 6, so as to adsorb the paper board and convey the paper board along the direction of the whole section of the upper conveyor belt 5.

Referring to fig. 8 to 12, a forming device 9 is mounted on one side, i.e. the outer side, of each upper beam 3 relative to each suction head 6, the forming device 9 is used for folding the side plate portion connected with the central plate portion from an obtuse angle to overlap with the central plate portion, i.e. the folding angle of the side plate and the central plate portion changes from an obtuse angle to a zero angle, the forming device 9 comprises a mounting seat 91, a plurality of folding wheels 92, a folding wheel driving device 93, a folding knife 94, a folding rod 95 and a folding belt 96, the mounting seat 91 is mounted on the outer side of the upper beam 3, the plurality of folding wheels 92 are rotatably mounted on the bottom surface of the mounting seat 91, the folding wheel driving device 93 is mounted on the top surface of the mounting seat 91 and is used for driving the plurality of folding wheels 92 to rotate synchronously, each folding wheel 92 is provided with a clamping groove 923 formed by an upper flange 921 and a lower flange 922, the inclination degree of the lower flange 922 gradually tends to be flat, so that the, the folding knife 94 is arranged on the top surface of the lower beam 2 and extends along the same level with the edge of the front-section lower conveying belt 4, the folding knife 94 extends from the preset position of the front-section lower conveying belt 4 to the rear of the starting end of the plurality of folding wheels 92, the thickness of the folding knife 94 is gradually reduced along the arrangement direction of the plurality of folding wheels 92, the folding knife 94 cooperates with the clamping groove 923 of the folding wheels 92 to gradually fold the paper board from an obtuse angle, the folding knife 94 supports against the inner side of the folded angle of the paper board, the clamping groove 923 clamps the outer side of the folded angle of the paper board, the folding knife 94 and the clamping groove 923 of each folding wheel 92 form a folding gap, the clamping width of the folding gap along the conveying direction is gradually narrowed, the sheet feeding plate is gradually folded and formed in the folding gap, the folding knife 94 further extends for a preset length at the starting end of the folding wheel 92, after the folding paper board folding angles are folded by a preset angle from the starting end of the folding wheels 92, the folding wheels 92 at the tail ends independently fold the paper board folding angles completely.

Two folding rods 95 are oppositely arranged and used for supporting the side plate parts at two sides of the paper board to be folded towards the central plate part, one folding rod 95 is arranged between the upper beam 3 and the lower beam 2 at one side, the other folding rod 95 is arranged between the upper beam 3 and the lower beam 2 at the opposite side, the two folding rods 95 extend along the length direction of the upper beam 3, the distance between the two folding rods 95 is gradually reduced along the extending direction, the height of the two folding rods 95 is gradually reduced along the extending direction and then gradually increased to the original height, one section of the folding rod 95 close to the paper inlet end is arranged on the upper beam 3, one section of the folding rod 95 close to the paper outlet end is arranged on the lower beam 2, the folding rods 95 extend from the outer side of the upper beam 3 to the inner side of the lower beam 2 in a curve shape, two side plates of the paper board are gradually folded and formed under the guiding of the two folding rods 95, two folding belts 96 are oppositely arranged, a plurality of folding wheels 92, the two side plate parts for supporting the paper board are oppositely changed along with the folding angle of the paper board, so that the folding surface of the paper board is attached to the folding belt 96 for conveying.

The forming device 9 is provided with a mounting seat 91, a plurality of folding wheels 92, a folding wheel driving device 93, a folding knife 94, folding rods 95 and a folding belt 96 which are matched, the paper boards are input in a flat shape from a paper feeding end, under the guiding action of the two folding rods 95, two opposite side boards of the paper boards are gradually folded downwards, when the two opposite side boards are folded to be close to 90 degrees, the paper boards start to enter the folding wheels 92, under the action of the folding wheels 92 and the folding knife 94 on two sides, the guiding action of the two folding rods 95 and the synchronous conveying action of the folding belt 96 on the paper board folding boards are matched simultaneously, the two opposite side boards of the paper boards are gradually folded to be overlapped with the plane of the original paper boards from 90 degrees, and accordingly the folding forming of the paper boards is completed. The forming process can improve the forming quality of the carton and the stability of mechanical operation.

Folding wheel drive 93 includes a plurality of synchronizing wheels 931, a plurality of pinch rollers 932, folding wheel drive motor 933 and hold-in range 934, and the center pin of each folding wheel 92 upwards passes mount pad 91, and each synchronizing wheel 931 rigid coupling is on the center pin of each folding wheel 92, is equipped with pinch roller 932 between two arbitrary adjacent synchronizing wheels 931, and folding wheel drive motor 933 is fixed in on mount pad 91, and the action wheel of folding wheel drive motor 933 passes through hold-in range 934 and is connected with a plurality of synchronizing wheels 931 and a plurality of pinch roller 932.

The mount pad 91 includes the bottom plate and the protruding curb plate that stretches out in bottom plate one side, curb plate mid-mounting has clearance adjustment motor 911, go up 3 and install screw base 912 with clearance adjustment motor 911 corresponding position on the roof beam, install lead screw 913 on the clearance adjustment motor 911, the end that stretches out of lead screw 913 wears to locate in screw base 912, the interval is equipped with a plurality of uide bushing 914 on the curb plate of mount pad 91, be equipped with guide pillar 915 in the uide bushing 914, go up 3 and correspond the position with uide bushing 914 and be equipped with the guide holder 916, guide pillar 915 wears to locate in the guide holder 916. By controlling the rotation of the gap adjusting motor 911, the distance between the folding wheel 92 on one side and the folding wheel 92 on the other side can be adjusted.

The utility model discloses it is necessary to provide a folding forming method of cardboard, include following step:

the paper board is fed from the paper feeding ends of the front section lower conveying belt 4 and the whole section upper conveying belt 5, the paper board is clamped by the front section lower conveying belt 4 and the whole section upper conveying belt 5 and conveyed along the forming direction, under the guide of the two folding rods 95 and the abutting joint action of the two folding knives 94, the two side plate parts of the paper board are gradually folded in half along the corresponding folding knives 94 by a preset angle, then the paper board is separated from the front section lower conveying belt 4 and sequentially enters the plurality of folding wheels 92, the whole section upper conveying belt 5 drives the paper board to move under the adsorption action of the plurality of adsorption heads 6, the paper board is continuously and gradually folded in half by the preset angle under the joint action of the front folding wheels 92, the folding rods 95 and the folding knives 94, when the two side plate parts of the paper board are folded in half to the state that the two side plate parts are perpendicular to the central plate part, the folding belts 96 begin to be attached to the two, when the included angle between the side plate part and the central plate part of the paperboard is not enough to accommodate the folding knife 94, the two folding knives 94 stop extending, and under the combined action of the folding wheels 92, the folding rods 95, the folding belts 96, the whole-section upper conveying belt 5 and the adsorption head 6 at the tail ends, the two side plate parts of the paperboard are superposed with the central plate part, and the butt joint edges of the two side plate parts are bonded.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.

Claims (7)

1. A folding mechanism of a carton gluing machine is used for folding paperboards from two sides to a central plate part to enable the two side plate parts to be connected and bonded, the folding mechanism comprises two lower beams (2) and two upper beams (3) which are arranged on a supporting seat (1), each upper beam (3) and each lower beam (2) are arranged up and down correspondingly, one side of the front section of each lower beam (2) facing to the other lower beam (2) is provided with a plurality of belt wheels at intervals along the conveying direction of the paperboards, a plurality of front section lower conveying belts (4) are wound on the plurality of belt wheels of the front section of each lower beam (2), one side of the whole section of each upper beam (3) facing to the other upper beam (3) is provided with a plurality of belt wheels at intervals along the conveying direction, a whole section upper conveying belt (5) is wound on the plurality of belt wheels of the whole section of each upper beam (3), the whole section upper conveying belt (5) is longer than the front section lower conveying belts (4), and a gap for clamping the paper conveying plates is formed between the whole, the method is characterized in that: the rear section of the whole upper conveying belt (5) is not provided with a rear section lower conveying belt for matching, one side, facing to the other upper beam (3), of the rear section of each upper beam (3) is provided with a rear section adsorption device, the rear section adsorption device comprises a plurality of adsorption heads (6) and is used for adsorbing a central plate part of a paperboard to the lower surface of the whole upper conveying belt (5), two side plate parts of the paperboard extend out of the whole upper conveying belt (5), one side, namely the outer side, opposite to each adsorption head (6) of each upper beam (3) is provided with a forming device (9), the forming device (9) is used for folding the side plate part connected with the central plate part from an obtuse angle to be superposed with the central plate part, namely the folding angle of the side plate and the central plate part is changed from an obtuse angle to a zero angle, the forming device (9) comprises a mounting seat (91), a plurality of folding wheels (92), a folding wheel driving device (93) and a folding knife (94), the mounting seat, the folding wheels (92) are rotatably arranged on the bottom surface of the mounting seat (91), the folding wheel driving device (93) is arranged on the top surface of the mounting seat (91) and is used for driving the folding wheels (92) to rotate synchronously, each folding wheel (92) is provided with a clamping groove (923) formed by an upper flange (921) and a lower flange (922), the inclination degree of the lower flange (922) gradually tends to be straight, so that the width of the clamping groove (923) of the folding wheels (92) is gradually reduced along the conveying direction of the paperboard, the folding knife (94) is arranged on the top surface of the lower beam (2) and extends along the same level with the edge of the front-section lower conveying belt (4), the folding knife (94) extends from the preset position of the front-section lower conveying belt (4) to the rear end of the folding wheels (92), the thickness of the folding knife (94) is gradually reduced along the arrangement direction of the folding wheels (92), and the folding knife (94) is matched with the clamping groove (923) of the folding wheels (92) to gradually fold the paperboard from an, the folding knife (94) abuts against the inner side of the folded paperboard, the clamping groove (923) clamps the outer side of the folded paperboard, the folding knife (94) and the clamping groove (923) of each folding wheel (92) form a folding gap, the clamping width of the folding gap gradually narrows along the conveying direction, so that the paper supply plate is gradually folded and formed in the folding gap, the folding knife (94) further extends to a preset length at the starting end of the folding wheel (92) to match the folding paperboard folded angle from the starting end of the folding wheel (92) to be folded by a preset angle, and the folding wheels (92) at a plurality of tail ends independently completely fold the folded paperboard folded angle.

2. The folding mechanism of the box gluing machine according to claim 1, wherein the forming device (9) comprises two opposite folding rods (95) and folding belts (96), the two opposite folding rods (95) are used for supporting the side plate parts at the two sides of the paper board to be folded towards the central plate part, one folding rod (95) is arranged between the upper beam (3) and the lower beam (2) at one side, the other folding rod (95) is arranged between the upper beam (3) and the lower beam (2) at the opposite side, the two folding rods (95) extend along the length direction of the upper beam (3), the distance between the two folding rods (95) is gradually reduced along the extending direction, the height of the two folding rods (95) is gradually reduced and then gradually increased to the original height along the extending direction, the folding rod (95) close to the paper inlet end is arranged on one section of the upper beam (3), the section of the folding rod (95) close to the paper outlet end is arranged on the lower beam (2), folding rod (95) are the curve form from the upper beam (3) outside and extend to underbeam (2) inboard, the both sides board of cardboard is to folding shaping gradually under the direction of two folding rods (95), folding belt (96) are equipped with two relatively, locate respectively between a plurality of folding wheel (92) and folding rod (95) of every side, a both sides board for holding in the palm year cardboard, the inclination of folding belt (96) is to changing along with the folding angle of cardboard, make the folded surface laminating of cardboard convey on folding belt (96).

3. The folding mechanism of a box gluing machine according to claim 1, characterized in that a plurality of adsorption heads (6) are arranged at intervals along the rear section of the whole upper conveyor belt (5), a plurality of vent holes are arranged on the whole upper conveyor belt (5), and the lower surface of each adsorption head (6) is provided with an adsorption hole.

4. The folding mechanism of a box gluing machine as claimed in claim 1, wherein the folding wheel driving device (93) comprises a plurality of synchronizing wheels (931), a plurality of pressing wheels (932), a folding wheel driving motor (933) and a synchronous belt (934), the central shaft of each folding wheel (92) upwards passes through the mounting seat (91), each synchronizing wheel (931) is fixedly connected to the central shaft of each folding wheel (92), a pressing wheel (932) is arranged between any two adjacent synchronizing wheels (931), the folding wheel driving motor (933) is fixed on the mounting seat (91), and the driving wheel of the folding wheel driving motor (933) is connected with the plurality of synchronizing wheels (931) and the plurality of pressing wheels (932) through the synchronous belt (934).

5. The folding mechanism of the box gluing machine as claimed in claim 1, wherein the mounting seat (91) comprises a bottom plate and a side plate protruding from one side of the bottom plate, a gap adjusting motor (911) is installed in the middle of the side plate, a screw rod seat (912) is installed on the upper beam (3) at a position corresponding to the gap adjusting motor (911), a screw rod (913) is installed on the gap adjusting motor (911), an extending end of the screw rod (913) penetrates through the screw rod seat (912), a plurality of guide sleeves (914) are arranged on the side plate of the mounting seat (91) at intervals, a guide post (915) is arranged in each guide sleeve (914), a guide seat (916) is arranged on the upper beam (3) at a position corresponding to the guide sleeves (914), and the guide post (915) penetrates through the guide seat (916).

6. The folding mechanism of a box gluing machine according to claim 1, characterized in that each upper beam (3) is provided with a pressure adjusting device for adjusting the pressure of the whole upper conveyor belt (5).

7. A folding mechanism of a box gluing machine according to claim 6, characterized in that the pressure adjusting device comprises a front pressure adjusting device (7) and a rear pressure adjusting device (8).

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