Paper wrapping mechanism of printed product packaging machine

Abstract

The invention discloses a paper wrapping mechanism of a printed product packaging machine, comprising a paper wrapping frame, a paper feeding device, an annular paper feeding mechanism, an annular paper guiding mechanism, a paper pressing driving mechanism, a paper pressing head, a bottom supporting mechanism, a paper cutting mechanism and a plurality of adsorption mechanisms, as well as a front paper clamping mechanism and a rear paper clamping mechanism which can clamp and lift along the up and down directions of the paper wrapping frame; a paper feeding stack opening is arranged on the front side of the paper wrapping frame, and a paper discharging stack opening is arranged on the rear side of the paper wrapping frame; the kraft paper of the invention can be dragged and automatically wrapped to ensure that the kraft paper is smoothly delivered, and the cylindrical kraft paper is automatically tightened on the circumference of the whole stack of paper, and the upper and lower edges of the whole stack of paper can be temporarily clamped and lifted, freeing up space for an external paper discharging robot to enter, facilitating the entry and exit of the external paper feeding robot, so that the external paper discharging robot can reach below the whole stack of paper after paper wrapping, clamp and deliver the whole stack of paper after paper wrapping, always maintain the tension of the kraft paper, and ensure that the printed products are neatly packaged.

Description

Technical Field

[0001] The invention relates to a printed product processing device, in particular to a paper wrapping mechanism of a printed product packaging machine. Background Art

[0002] The printed product baler wraps the whole stack of printed products with kraft paper and fixes the two ends of the kraft paper with tape to facilitate the storage and transportation of printed products. At present, in the process of packaging and transporting printed products, it is generally carried out manually to transport the neatly stacked paper stacks to the conveying mechanism for transportation, and then the kraft paper baling device baled the whole stack of paper.

[0003] When wrapping with kraft paper, the whole stack of printed products needs to be stacked neatly by hand first, and then the kraft paper is pulled manually to wrap the printed products after the whole stack of printed products is fixed. This manual arrangement method cannot automatically position the whole stack of printed products, which can easily cause the whole stack of printed products to be stacked unevenly and skewed. When wrapping with kraft paper, the whole stack of printed products needs to be re-arranged, which is time-consuming and laborious. In addition, when the kraft paper is pulled manually, the kraft paper can only be wrapped along the surface of the printed products, and the paper cannot be fed in a different direction. The kraft paper cannot be wrapped tightly against the whole stack of printed products, and the printed product packaging machine cannot wrap the paper automatically; the tension of the kraft paper cannot be guaranteed. If the kraft paper is too loose, the kraft paper wrapped on the top of the printed product cannot form a folding corner with the top edge of the printed product, and the whole stack of printed products is easy to be loose. If the kraft paper is to be tightened, it is easy to wrinkle and break the kraft paper. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a paper wrapping mechanism for a printed product baling machine, which can automatically wrap and feed paper and tighten it, always maintain the tension of kraft paper, and ensure that the printed products are neatly packaged.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A paper wrapping mechanism of a printed product packaging machine, characterized in that it includes a paper wrapping frame, a paper feeding device, an annular paper feeding mechanism, an annular paper guiding mechanism, a paper pressing driving mechanism, a paper pressing head, a bottom supporting mechanism, a paper cutting mechanism and a plurality of adsorption mechanisms, as well as a front paper clamping mechanism and a rear paper clamping mechanism that can clamp and lift along the up and down directions of the paper wrapping frame; a paper feeding stack opening is provided on the front side of the paper wrapping frame, and a paper discharging stack opening is provided on the rear side of the paper wrapping frame; the annular paper feeding mechanism and the annular paper guiding mechanism are both arranged on the inner side of the paper wrapping frame, and each adsorption mechanism is evenly arranged on the circumference of the paper wrapping frame and is located on the outer side of the annular paper feeding mechanism and the annular paper guiding mechanism; a paper feeding channel is provided at the lower right part of the paper wrapping frame, and the paper feeding device is installed on the paper wrapping frame and corresponds to the right end of the paper feeding channel; A strip notch is provided at corresponding positions of the lower parts of the paper mechanism and the annular paper guiding mechanism, and the strip notch corresponds to the left end of the paper feeding channel; the paper pressing driving mechanism is installed on the outside of the paper wrapping frame, the power output end of the paper pressing driving mechanism is arranged downward, the paper pressing head is installed on the power output end of the paper pressing driving mechanism, and a paper pressing through hole for the paper pressing head to pass through is provided on the top of the annular paper guiding mechanism, the paper pressing through hole is communicated with the inner cavity of the paper wrapping frame and corresponds to the strip notch; the bottom supporting mechanism and the paper cutting mechanism are installed at the bottom of the paper wrapping frame from left to right, and the paper supporting end of the bottom supporting mechanism and the paper cutting end of the paper cutting mechanism are both in the strip notch; the front paper clamping mechanism is arranged at the paper feeding stack opening and at the front end of the strip notch, and the front paper clamping mechanism is arranged at the paper discharging stack opening and at the rear end of the strip notch.

[0007] The above definitions of left and right mean that along the conveying direction of the kraft paper, the first to arrive is the right, and the slowest to arrive is the left. The above definitions of front and back mean that along the conveying direction of the paper stack, the first to arrive is the front, and the slowest to arrive is the back. The above definitions of left, right, front, and back are for the convenience of expression, and can actually be changed to any other direction.

[0008] Usually, the above-mentioned paper pressing driving mechanism is a paper pressing driving cylinder, the piston rod of the paper pressing driving cylinder is arranged downward, and the paper pressing head is installed on the end of the piston rod of the paper pressing driving cylinder.

[0009] During operation, after the kraft paper is unwound from the kraft paper unwinding mechanism, it is pulled to the paper feeding device by the traction mechanism, and then the paper feeding device controls the kraft paper to be transported into the paper feeding channel. The paper feeding channel controls the direction of the kraft paper to send the head end of the kraft paper through the strip notch to the annular paper feeding mechanism and the annular paper guiding mechanism. Then, through the drive of the annular paper feeding mechanism and the guidance of the annular paper guiding mechanism, multiple adsorption mechanisms outside the paper wrapping frame generate negative pressure on the inner side of the annular paper feeding mechanism and the annular paper guiding mechanism, so that each adsorption mechanism adsorbs the kraft paper inside the annular paper feeding mechanism and the annular paper guiding mechanism, and the outer surface of the kraft paper is tightly attached to the annular paper guiding mechanism, and the kraft paper is dragged under the drive of the annular paper feeding mechanism. Pre-wrapping is performed so that the leading end of the kraft paper is wrapped to overlap with the kraft paper on the strip notch and form a cylindrical kraft paper to cover the strip notch, i.e. the pre-wrapping is stopped; next, an external paper feeding robot places the entire stack of paper from the paper feeding port into the cylindrical kraft paper, and after the upper and lower edges of the entire stack of paper are temporarily clamped and lifted along the upper and lower directions of the paper wrapping frame by the front paper clamping mechanism and the rear paper clamping mechanism, the external paper feeding robot releases the clamping of the entire stack of paper and withdraws from the cylindrical kraft paper, and the front paper clamping mechanism and the rear paper clamping mechanism place the entire stack of paper downward on the bottom of the inner cavity of the paper wrapping frame while maintaining the clamping of the entire stack of paper and press it on the leading end of the kraft paper, and then the kraft paper is controlled to move toward the paper feeding device through the paper feeding device. The first reverse paper drawing is performed on the outside of the channel, so that the right side of the cylindrical kraft paper is attached to the right side of the whole paper stack, and the top surface of the cylindrical kraft paper is attached to the top surface of the whole paper stack; then, the paper pressing head is driven downward by the paper pressing drive mechanism, so that the bottom surface of the paper pressing head passes through the paper pressing through hole at the top of the annular paper guiding mechanism, and enters the inside of the paper wrapping frame to press on the kraft paper on the top of the whole paper stack, and the kraft paper is pressed tightly on the top of the whole paper stack; then, the kraft paper is controlled by the paper feeding device to be reversely drawn to the outside of the paper feeding channel for the second time, so that the left side of the cylindrical kraft paper is tightly attached to the left side of the whole paper stack, and the bottom surface of the cylindrical kraft paper and the head end of the kraft paper are both tightly attached to the bottom of the whole paper stack. The entire cylindrical kraft paper is tightened on the circumference of the whole stack of paper; then, the external paper discharging robot extends from the paper discharging port into the inner cavity of the paper wrapping frame, and after clamping the whole stack of paper that has been wrapped, the front paper clamping mechanism and the rear paper clamping mechanism release the clamping of the upper and lower edges of the whole stack of paper, and the paper pressing drive mechanism drives the paper pressing head to move upward to release the pressure on the top of the whole stack of paper. At the same time, the paper supporting end of the bottom supporting mechanism rises from the strip notch and supports the bottom of the whole stack of paper, and then the paper cutting end of the paper cutting mechanism also rises from the strip notch to cut off the end of the kraft paper at the bottom of the whole stack of paper; finally, the external paper discharging robot takes the whole stack of paper that has been wrapped out from the inner cavity of the paper wrapping frame from the paper discharging port.

[0010] The paper feeding device generally needs to pull the paper back gently during the first reverse paper pulling in order to avoid excessive force so that the weight of the entire paper stack cannot hold down the leading end of the kraft paper, causing the leading end of the kraft paper to be pulled back from the bottom of the entire paper stack.

[0011] As a preferred embodiment of the present invention, the front paper clamping mechanism and the rear paper clamping mechanism both include an upper paper clamping cylinder, an upper clamping block, a lower paper clamping cylinder and a lower clamping block. The upper paper clamping cylinder is installed on the top of the paper wrapping frame, the piston rod of the upper paper clamping cylinder is set downward, and the upper clamping block is installed on the end of the piston rod of the upper paper clamping cylinder; the lower paper clamping cylinder is installed on the bottom of the paper wrapping frame, the piston rod of the lower paper clamping cylinder is set upward, and the lower clamping block is installed on the end of the piston rod of the lower paper clamping cylinder, and the lower clamping block is parallel to the upper clamping block and corresponds to the upper clamping block; the two upper paper clamping cylinders in the front paper clamping mechanism and the rear paper clamping mechanism are respectively located on the front and rear sides of the paper pressing mechanism, and the two lower paper clamping cylinders in the front paper clamping mechanism and the rear paper clamping mechanism are respectively located on the front and rear sides of the strip notch. The upper paper clamping cylinder drives the upper clamping block to descend downward, and the lower paper clamping cylinder drives the lower clamping block to rise upward, so that the two pairs of upper clamping blocks and lower clamping blocks respectively temporarily clamp and lift the upper and lower ends of the whole stack of paper so that the external paper feeding robot can exit.

[0012] As a preferred solution of the present invention, the bottom supporting mechanism includes a paper supporting cylinder and a paper supporting seat, the paper supporting cylinder is installed at the bottom of the paper wrapping frame, the piston rod of the paper supporting cylinder is arranged upward, the paper supporting seat is installed on the end of the piston rod of the paper supporting cylinder, and the paper supporting seat is located in the strip-shaped gap. The paper supporting seat is driven by the paper supporting cylinder to move up and down in the strip-shaped gap, so as to facilitate lifting the whole stack of paper after the kraft paper is tightly wrapped.

[0013] As a preferred solution of the present invention, the paper cutting mechanism includes a paper cutting cylinder and a cutter, the paper cutting cylinder is installed at the bottom of the paper wrapping frame, the piston rod of the paper cutting cylinder is arranged upward, the cutter is installed on the end of the piston rod of the paper cutting cylinder, and the cutter is located in the strip-shaped notch, and the blade of the cutter is arranged upward. The paper cutting cylinder drives the cutter to move up and down in the strip-shaped notch, so as to facilitate cutting off the end of the kraft paper at the bottom of the whole stack of paper.

[0014] As a preferred embodiment of the present invention, a tightening cylinder and an auxiliary tightening roller are provided at the paper feed stack opening of the paper wrapping frame. The tightening cylinder is installed at the upper left part of the paper wrapping frame, and the piston rod of the tightening cylinder faces the inner cavity of the paper wrapping frame. One end of the auxiliary tightening roller is connected to the end of the piston rod of the tightening cylinder, and the auxiliary tightening roller is parallel to the bottom surface of the paper wrapping frame. An auxiliary tightening roller is added at the upper left part of the paper feed stack opening of the paper wrapping frame. When tightening, the auxiliary tightening roller is driven by the tightening cylinder to enter the inner cavity of the paper wrapping frame and pass through the inner side of the cylindrical kraft paper; when the paper feeding device controls the kraft paper to gently pull the paper in the first reverse direction toward the outside of the paper feed channel, the auxiliary tightening roller supports the upper left part of the cylindrical kraft paper, so that the auxiliary tightening roller guides and tensions the cylindrical kraft paper, so that the right side of the cylindrical kraft paper is tightly attached to the entire paper feed channel. on the right side of the stack of paper; when the paper pressing head presses the kraft paper on the top of the entire stack of paper, the tightening cylinder drives the tightening auxiliary roller to retract and exit the inner cavity of the paper wrapping frame, so that the tightening auxiliary roller releases its support for the upper left part of the tubular kraft paper, and then the paper feeding device controls the kraft paper to be reversely pulled to the outside of the paper feeding channel for the second time, so that the left side of the tubular kraft paper is tightly attached to the left side of the entire stack of paper, so that the tubular kraft paper is tightened on the circumference of the entire stack of paper.

[0015] As a preferred solution of the present invention, the annular paper feeding mechanism includes a plurality of annular paper feeding units, each of which is arranged in the inner cavity of the paper wrapping frame along the circumference of the paper wrapping frame; the annular paper guiding mechanism includes a plurality of annular paper guiding units, a guide interval is arranged between two adjacent annular paper feeding units, each annular paper guiding unit is arranged in a corresponding guide interval, and each of the adsorption mechanisms is located outside each guide interval. Each adsorption mechanism generates negative pressure outside each guide interval, and the adsorption mechanism adsorbs the kraft paper through the guide interval, so that the outer surface of the kraft paper is closely attached to the inner surface of each annular paper feeding unit.

[0016] As a further preferred embodiment of the present invention, the annular paper feeding unit comprises two rollers, a plurality of annular belts and a rotation driving device capable of driving one of the rollers to rotate, the two rollers are arranged parallel to each other in the inner cavity of the paper wrapping frame, the two rollers are provided with a plurality of annular grooves arranged at equal intervals, each annular belt is tensioned in the corresponding annular grooves on the two rollers and forms an annular shape, and the guide interval is formed between two adjacent annular belts; one of the rollers is connected to the power output end of the rotation driving device by transmission. Usually, the above-mentioned rotation driving device comprises a first driving pulley, a first driven pulley, a first synchronous belt and a first conveying motor, the first driving pulley and the first conveying motor are both installed on the paper wrapping frame, the first driven pulley is installed on one of the rollers, the first driving pulley and the first driven pulley jointly tension the first synchronous belt, and the first driving pulley is connected to the output shaft of the first conveying motor by transmission. The first conveying motor is used to drive the first driving pulley to rotate, and the rollers are driven to rotate with the rotation of the first driving pulley under the connection of the annular belts. In the above-mentioned two adjacent annular paper feeding units, there is a roller shared by both of them; a plurality of annular paper feeding units can be provided with one rotating drive device, and the rollers in each annular paper feeding unit are arranged parallel to each other in the inner cavity of the paper wrapping frame to form an annular shape, and are tensioned in the corresponding annular grooves on the two adjacent rollers through each annular belt, one of the rollers is transmission-connected to the power output end of the rotating drive device, and one of the rollers is driven to rotate by the rotating drive device, and the rotation between the rollers is realized under the drive of each annular belt, and each annular belt in transportation forms the annular paper feeding mechanism.

[0017] As a further preferred embodiment of the present invention, the annular paper guide unit includes a paper stop guide plate, the guide interval is formed between the two adjacent annular belts, the paper stop guide plate is arranged in the corresponding guide interval, and the inner surface of the paper stop guide plate is lower than the inner surface of the two adjacent annular belts. Generally, each paper stop guide plate can be screwed to the frame body outside the paper wrapping frame. The present invention forms a kraft paper wrapping structure by arranging each roller, each annular belt and each paper stop guide plate in the inner cavity of the paper wrapping frame, and arranging multiple adsorption mechanisms outside the paper wrapping frame. Each adsorption mechanism generates negative pressure on the outer side of each annular belt, and adsorbs the kraft paper through the guide interval between each annular belt, so that the outer surface of the kraft paper is tightly attached to the inner surface of each paper stop guide plate, and the kraft paper is dragged for wrapping under the cooperation of each annular belt and each paper stop guide plate.

[0018] As a further preferred embodiment of the present invention, the paper pressing through hole is formed by a guide interval at the top of the paper wrapping frame, and the paper pressing head is formed by a plurality of strip-shaped pressing blocks, and a strip-shaped gap for the annular belt to enter is provided between two adjacent strip-shaped pressing blocks. Through this arrangement, the paper pressing head formed by the plurality of strip-shaped pressing blocks can pass through the guide interval between two adjacent annular belts, and each annular belt enters the strip-shaped gap between two adjacent strip-shaped pressing blocks, respectively, so that the paper pressing head passes through the paper pressing through hole and enters the interior of the paper wrapping frame.

[0019] As a further preferred embodiment of the present invention, the endless belt is a belt with a circular cross section, and the belt is made of rubber. The surface of the rubber belt with a circular cross section is smooth, which can prevent the surface of the kraft paper from being scratched during transportation and can also play a role in shock absorption.

[0020] As a further preferred embodiment of the present invention, the paper wrapping frame includes two annular frames and a plurality of supporting rods connected between the two annular frames, and both ends of each of the rollers can be rotatably mounted on the two annular frames. The annular frames and the plurality of supporting rods connected between the two annular frames constitute the paper wrapping frame, and each annular paper guide unit can be fastened to the supporting rod of the paper wrapping frame by screws.

[0021] As a preferred solution of the present invention, a guide base is provided at the lower right part of the paper wrapping frame, the top surface of the guide base is a guide arc surface that gradually bends downward from right to left, a plurality of guide notches are provided at the upper right edge of the guide arc surface, and the lower ends of the ring belts on the right side of the inner cavity of the paper wrapping frame pass through the corresponding guide notches respectively; the paper feed channel is provided in the guide base. When the kraft paper is dragged, the head end of the kraft paper will be gradually transported downward from right to left along the guide arc surface to the kraft paper on the strip notch, which plays a guiding role in the wrapping of the kraft paper.

[0022] As a further preferred embodiment of the present invention, the paper feed channel is gradually inclined upward from right to left. Through this paper feed channel gradually inclined upward from right to left, kraft paper can be gradually transported upward from right to left to the roller on the bottom of the paper wrapping frame.

[0023] As a preferred solution of the present invention, the paper feeding device includes an active roller, a pressure roller and an active roller driving motor, the active roller driving motor is mounted on the paper wrapping frame, the active roller is rotatably mounted on the paper wrapping frame, one end of the active roller is drivingly connected to the power output shaft of the active roller driving motor; the pressure roller is mounted on the paper wrapping frame, the pressure roller is above the active roller and is arranged parallel to the active roller, and there is a paper feeding gap between the pressure roller and the active roller, and the paper feeding gap corresponds to the paper feeding channel. When working, the end of the kraft paper is passed through the paper feeding gap between the pressure roller and the active roller, and the active roller is driven by the active roller driving motor to rotate, so that the kraft paper is driven by the active roller from the paper feeding gap to the paper feeding channel.

[0024] As a preferred solution of the present invention, the number of the adsorption mechanisms is four, the first adsorption mechanism is arranged on the left side of the outside of the paper wrapping frame, the second adsorption mechanism is arranged on the upper left side of the outside of the paper wrapping frame, the third adsorption mechanism is arranged on the upper right side of the outside of the paper wrapping frame, and the fourth adsorption mechanism is arranged on the right side of the outside of the paper wrapping frame; the adsorption mechanism is a fan, the air outlet of the fan is arranged outward, and the air inlet of the fan corresponds to the outer side of the annular paper feeding mechanism and the annular paper guiding mechanism. When the fan is running, the fan blows air outward and forms a negative pressure zone on the outer side of each guide interval, so that the kraft paper on the inner side of each endless belt is tightly attached to the inner surface of each endless belt.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present invention forms a kraft paper wrapping structure by arranging an annular paper feeding mechanism and an annular paper guiding mechanism in the inner cavity of a paper wrapping frame, and arranging a plurality of adsorption mechanisms outside the paper wrapping frame. The adsorption mechanism generates negative pressure to adsorb the outer surface of the kraft paper through the annular paper feeding mechanism and the annular paper guiding mechanism, so that the kraft paper can be dragged and automatically wrapped, ensuring that the kraft paper is smoothly delivered, and the cylindrical kraft paper is automatically tightened on the circumference of the whole stack of paper. The bottom supporting mechanism lifts up the whole stack of paper after the kraft paper is tightly wrapped so as to cut the kraft paper, and then the upper and lower ends of the whole stack of paper are temporarily clamped and lifted up along the upper and lower directions of the paper wrapping frame by the front paper clamping mechanism and the rear paper clamping mechanism, freeing up space for an external paper discharging robot to enter, facilitating the entry and exit of the external paper feeding robot, so that the external paper discharging robot can reach below the whole stack of paper after the paper wrapping is completed, clamp and deliver the whole stack of paper after the paper wrapping is completed, and enter the subsequent adhesive paper sticking station, so as to always maintain the tension of the kraft paper and ensure that the printed products are neatly packaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0028] Figure 2 yes Figure 1 Cross-section of the middle AA;

[0029] Figure 3 It is a structural schematic diagram of a paper wrapping frame hiding an annular frame in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-3As shown, the paper wrapping mechanism of the printed product packing machine in this embodiment includes a paper wrapping frame 1, a paper feeding device 2, a ring-shaped paper feeding mechanism 3, a ring-shaped paper guiding mechanism 4, a paper pressing driving mechanism 6, a paper pressing head 7, a bottom supporting mechanism 8, a paper cutting mechanism 9 and a plurality of adsorption mechanisms 5, as well as a front paper clamping mechanism 11 and a rear paper clamping mechanism 12 that can clamp and lift along the up and down directions of the paper wrapping frame 1; a paper feeding stack opening 101 is provided on the front side of the paper wrapping frame 1, and a paper discharging stack opening 102 is provided on the rear side of the paper wrapping frame 1; the ring-shaped paper feeding mechanism 3 and the ring-shaped paper guiding mechanism 4 are both arranged on the inner side of the paper wrapping frame 1, and each adsorption mechanism 5 is evenly arranged on the circumference of the paper wrapping frame 1 and is located on the outer side of the ring-shaped paper feeding mechanism 3 and the ring-shaped paper guiding mechanism 4; a paper feeding channel 103 is provided on the lower right part of the paper wrapping frame 1, and the paper feeding device 2 is installed on the paper wrapping frame 1 and corresponds to the right end of the paper feeding channel 103; the ring-shaped paper feeding mechanism 3 , a strip notch 104 is provided at a corresponding position at the lower part of the annular paper guiding mechanism 4, and the strip notch 104 corresponds to the left end of the paper feeding channel 103; the paper pressing driving mechanism 6 is installed on the outside of the paper wrapping frame 1, the power output end of the paper pressing driving mechanism 6 is arranged downward, the paper pressing head 7 is installed on the power output end of the paper pressing driving mechanism 6, and a paper pressing through hole 42 for the paper pressing head 7 to pass through is provided on the top of the annular paper guiding mechanism 4, and the paper pressing through hole 42 is communicated with the inner cavity of the paper wrapping frame 1 and corresponds to the strip notch 104; the bottom supporting mechanism 8 and the paper cutting mechanism 9 are both installed at the bottom of the paper wrapping frame 1, and the paper supporting end of the bottom supporting mechanism 8 and the paper cutting end of the paper cutting mechanism 9 are both in the strip notch 104; the front paper clamping mechanism 11 is arranged at the paper feeding stack opening 101 and at the front end of the strip notch 104, and the front paper clamping mechanism 11 is arranged at the paper discharging stack opening 102 and at the rear end of the strip notch 104.

[0032] The above definitions of left and right mean that along the conveying direction of the kraft paper, the first to arrive is the right, and the slowest to arrive is the left. The above definitions of front and back mean that along the conveying direction of the paper stack, the first to arrive is the front, and the slowest to arrive is the back. The above definitions of left, right, front, and back are for the convenience of expression, and can actually be changed to any other direction.

[0033] Usually, the paper pressing driving mechanism 6 is a paper pressing driving cylinder, the piston rod of the paper pressing driving cylinder is arranged downward, and the paper pressing head 7 is installed on the end of the piston rod of the paper pressing driving cylinder.

[0034] The front paper clamping mechanism 11 and the rear paper clamping mechanism 12 both include an upper paper clamping cylinder 111, an upper clamping block 112, a lower paper clamping cylinder 113 and a lower clamping block 114. The upper paper clamping cylinder 111 is installed on the top of the paper wrapping frame 1, the piston rod of the upper paper clamping cylinder 111 is arranged downward, and the upper clamping block 112 is installed on the end of the piston rod of the upper paper clamping cylinder 111; the lower paper clamping cylinder 113 is installed on the bottom of the paper wrapping frame 1, the piston rod of the lower paper clamping cylinder 113 is arranged upward, and the lower clamping block 114 is installed on the end of the piston rod of the lower paper clamping cylinder 113, and the lower clamping block 114 is parallel to the upper clamping block 112 and corresponds to each other; the two upper paper clamping cylinders 111 in the front paper clamping mechanism 11 and the rear paper clamping mechanism 12 are respectively located at the front and rear sides of the paper pressing mechanism 7, and the two lower paper clamping cylinders 113 in the front paper clamping mechanism 11 and the rear paper clamping mechanism 12 are respectively located at the front and rear sides of the strip-shaped notch 104. The upper clamping cylinder 111 drives the upper clamping block 112 to descend, while the lower clamping cylinder 113 drives the lower clamping block 114 to ascend, so that the two pairs of upper clamping blocks 112 and lower clamping blocks 114 respectively temporarily clamp and lift the upper and lower edges of the entire stack of paper so that the external paper feeding robot can exit.

[0035] The bottom supporting mechanism 8 includes a paper supporting cylinder 81 and a paper supporting seat 82. The paper supporting cylinder 81 is installed at the bottom of the paper wrapping frame 1. The piston rod of the paper supporting cylinder 81 is arranged upward. The paper supporting seat 82 is installed on the end of the piston rod of the paper supporting cylinder 81, and the paper supporting seat 82 is located in the strip-shaped notch 104. The paper supporting cylinder 81 drives the paper supporting seat 82 to move up and down in the strip-shaped notch 104, so as to facilitate lifting the whole stack of paper after the kraft paper is tightly wrapped.

[0036] The paper cutting mechanism 9 includes a paper cutting cylinder 91 and a cutter 92. The paper cutting cylinder 91 is installed at the bottom of the paper wrapping frame 1. The piston rod of the paper cutting cylinder 91 is arranged upward. The cutter 92 is installed at the end of the piston rod of the paper cutting cylinder 91. The cutter 92 is located in the strip-shaped notch 104, and the blade of the cutter 92 is arranged upward. The paper cutting cylinder 91 drives the cutter 92 to move up and down in the strip-shaped notch 104, so as to cut off the end of the kraft paper at the bottom of the whole stack of paper.

[0037] A tightening cylinder 15 and an auxiliary tightening roller 16 are provided at the paper inlet opening 101 of the paper wrapping frame 1. The tightening cylinder 15 is installed at the upper left part of the paper wrapping frame 1. The piston rod of the tightening cylinder 15 faces the inner cavity of the paper wrapping frame 1. One end of the auxiliary tightening roller 16 is connected to the end of the piston rod of the tightening cylinder 15. The auxiliary tightening roller 16 is parallel to the bottom surface of the paper wrapping frame 1. An auxiliary tightening roller 16 is additionally provided at the upper left part of the paper inlet opening 101 of the paper wrapping frame 1. When tightening, the auxiliary tightening roller 16 is driven by the tightening cylinder 15 to enter the inner cavity of the paper wrapping frame 1 and pass through the inner side of the cylindrical kraft paper. When the paper feeding device 2 controls the kraft paper to reversely pull the paper toward the outer side of the paper feed channel 103 for the first time, the auxiliary tightening roller 16 supports the upper left part of the cylindrical kraft paper, so that the auxiliary tightening roller 16 guides and tensions the cylindrical kraft paper, so that the right side of the cylindrical kraft paper is tightly attached. On the right side of the whole stack of paper; when the paper pressing head 7 presses the kraft paper on the top of the whole stack of paper, the tightening auxiliary roller 16 is driven by the tightening cylinder 15 to retract and exit the inner cavity of the paper wrapping frame 1, so that the tightening auxiliary roller 16 releases the support for the upper left part of the tubular kraft paper, and then the kraft paper is controlled by the paper feeding device 2 to be reversely pulled to the outside of the paper feeding channel 103 for the second time, so that the left side of the tubular kraft paper is tightly attached to the left side of the whole stack of paper, so that the tubular kraft paper is tightened on the circumference of the whole stack of paper.

[0038] The annular paper feeding mechanism 3 includes a plurality of annular paper feeding units 31, each of which is arranged in the inner cavity of the paper wrapping frame 1 along the circumference of the paper wrapping frame 1; the annular paper guiding mechanism 4 includes a plurality of annular paper guiding units 41, a guide interval 32 is arranged between two adjacent annular paper feeding units 31, each annular paper guiding unit 41 is arranged in a corresponding guide interval 32, and each of the adsorption mechanisms 5 is located outside each guide interval 32. Each adsorption mechanism 5 generates negative pressure outside each guide interval 32, and the adsorption mechanism 5 adsorbs the kraft paper through the guide interval 32, so that the outer surface of the kraft paper is closely attached to the inner surface of each annular paper feeding unit 31.

[0039] The annular paper feeding unit 31 includes two rollers 311, a plurality of annular belts 312 and a rotating drive device 313 capable of driving one of the rollers 311 to rotate. The two rollers 311 are arranged parallel to each other in the inner cavity of the paper wrapping frame 1. The two rollers 311 are provided with a plurality of equally spaced annular grooves 3111. Each annular belt 312 is tensioned in the corresponding annular groove 3111 on the two rollers 311 and forms an annular shape. The guide gap 32 is formed between two adjacent annular belts 312. One of the rollers 311 is transmission-connected to the power output end of the rotating drive device 313. Usually, the rotation driving device 313 comprises a first driving pulley 3131, a first driven pulley 3132, a first synchronous belt 3133 and a first conveying motor 3134. The first driving pulley 3131 and the first conveying motor 3134 are both mounted on the paper wrapping frame 1, the first driven pulley 3132 is mounted on one of the rollers 311, the first driving pulley 3131 and the first driven pulley 3132 jointly tighten the first synchronous belt 3133, and the first driving pulley 3131 is connected to the output shaft of the first conveying motor 3134. The first conveying motor 3134 is used to drive the first driving pulley 3131 to rotate, and the rollers 311 are driven to rotate with the rotation of the first driving pulley 3131 under the connection of the various endless belts 312. In the above-mentioned two adjacent annular paper feeding units 31, there is a roller 311 shared by both; a plurality of annular paper feeding units 31 only need to be provided with one rotating drive device 313, and the rollers 311 in each annular paper feeding unit 31 are arranged parallel to each other in the inner cavity of the paper wrapping frame 1 and form an annular shape, and are tightened in the corresponding annular grooves 3111 on the two adjacent rollers 311 through each annular belt 312, and one of the rollers 311 is transmission-connected with the power output end of the rotating drive device 313, and one of the rollers 311 is driven to rotate by the rotating drive device 313, and the rotation between the rollers 311 is realized under the drive of each annular belt 312, and each annular belt 312 in conveyance forms the annular paper feeding mechanism 3.

[0040] The annular paper guide unit 41 includes a paper stop guide piece 411, and the guide interval 32 is formed between two adjacent annular belts 312. The paper stop guide piece 411 is arranged in the corresponding guide interval 32, and the inner surface of the paper stop guide piece 411 is lower than the inner surface of the two adjacent annular belts 312. Generally, each paper stop guide piece 411 can be screwed on the frame body of the paper wrapping frame 1 outside. The present invention forms a kraft paper wrapping structure by arranging each roller 311, each annular belt 312 and each paper stop guide piece 411 in the inner cavity of the paper wrapping frame 1, and arranging multiple adsorption mechanisms 5 outside the paper wrapping frame 1. Each adsorption mechanism 5 generates negative pressure on the outer side of each annular belt 312, and adsorbs the kraft paper through the guide interval 32 between each annular belt 312, so that the outer surface of the kraft paper is closely attached to the inner surface of each paper stop guide piece 411, and the kraft paper is dragged to wrap under the cooperation of each annular belt 312 and each paper stop guide piece 411.

[0041] The endless belt 312 is a belt with a circular cross section, and the material of the belt is rubber. The surface of the rubber belt with a circular cross section is smooth, which can prevent the surface of the kraft paper from being scratched during the transportation process and can also play a role in shock absorption.

[0042] The paper pressing through hole 42 is formed by the guide interval 32 at the top of the paper wrapping frame 1, and the paper pressing head 7 is formed by a plurality of strip-shaped pressing blocks 71, and a strip-shaped gap 72 for the annular belt 312 to enter is provided between two adjacent strip-shaped pressing blocks 71. Through this arrangement, the paper pressing head 7 formed by the plurality of strip-shaped pressing blocks 71 can pass through the guide interval 32 between two adjacent annular belts 312, and each annular belt 312 enters the strip-shaped gap 72 between two adjacent strip-shaped pressing blocks 71, so that the paper pressing head 7 passes through the paper pressing through hole 42 and enters the interior of the paper wrapping frame 1.

[0043] The paper wrapping frame 1 includes two annular frames 105 and a plurality of supporting rods 106 connected between the two annular frames 105, and both ends of each of the rollers 311 can be rotatably mounted on the two annular frames 105. The annular frames 105 and the plurality of supporting rods 106 connected between the two annular frames 105 constitute the paper wrapping frame 1, and each annular paper guide unit 41 can be fastened to the supporting rods 106 of the paper wrapping frame 1 by screws.

[0044] A guide base 107 is provided at the lower right part of the paper wrapping frame 1. The top surface of the guide base 107 is a guide arc surface 1071 that gradually bends downward from right to left. A plurality of guide notches 1072 are provided at the upper right edge of the guide arc surface 1071. The lower ends of the ring belts 312 on the right side of the inner cavity of the paper wrapping frame 1 respectively pass through the corresponding guide notches 1072. The paper feeding channel 103 is provided in the guide base 107. When the kraft paper is dragged, the head end of the kraft paper will be gradually transported downward from right to left along the guide arc surface 1071 to the kraft paper on the strip notch 104, which plays a guiding role in the wrapping of the kraft paper.

[0045] The paper feed passage 103 gradually tilts upward from right to left. Through this paper feed passage 103 gradually tilts upward from right to left, kraft paper can be gradually transported upward from right to left to the roller 311 on the bottom of the paper wrapping frame 1.

[0046] The paper feeding device 2 includes an active roller 21, a pressure roller 22 and an active roller driving motor (not marked in the figure), the active roller driving motor is installed on the paper wrapping frame 1, the active roller 21 is rotatably installed on the paper wrapping frame 1, one end of the active roller 21 is drivingly connected to the power output shaft of the active roller driving motor; the pressure roller is installed on the paper wrapping frame 1, the pressure roller is above the active roller 21 and is arranged parallel to the active roller 21, and there is a paper feeding gap 211 between the pressure roller and the active roller 21, and the paper feeding gap 211 corresponds to the paper feeding channel 103. When working, the end of the kraft paper passes through the paper feeding gap 211 between the pressure roller and the active roller 21, and the active roller 21 is driven by the active roller driving motor to rotate, so that the kraft paper is driven by the active roller 21 and conveyed from the paper feeding gap 211 to the paper feeding channel 103.

[0047] There are four adsorption mechanisms 5, the first adsorption mechanism 5 is arranged on the left side of the outside of the paper wrapping frame 1, the second adsorption mechanism 5 is arranged on the upper left side of the outside of the paper wrapping frame 1, the third adsorption mechanism 5 is arranged on the upper right side of the outside of the paper wrapping frame 1, and the fourth adsorption mechanism 5 is arranged on the right side of the outside of the paper wrapping frame 1; the adsorption mechanism 5 is a fan, the air outlet of the fan is arranged outward, and the air inlet of the fan corresponds to the outer side of the annular paper feeding mechanism 3 and the annular paper guiding mechanism 4. When the fan is running, the fan sends air outward and forms a negative pressure area on the outer side of each guide interval 32, so that the kraft paper on the inner side of each endless belt 312 is closely attached to the inner surface of each endless belt 312.

[0048] During operation, after the kraft paper is unwound from the kraft paper unwinding mechanism 13, the traction mechanism 14 pulls the kraft paper to the paper feeding device 2, and then the paper feeding device 2 controls the kraft paper to be transported into the paper feeding channel 103. The paper feeding channel 103 controls the direction of the kraft paper to send the head end of the kraft paper through the strip notch 104 to the annular paper feeding mechanism 3 and the annular paper guiding mechanism 4. Then, through the driving of the annular paper feeding mechanism 3 and the guiding of the annular paper guiding mechanism 4, the multiple adsorption mechanisms 5 outside the paper wrapping frame 1 generate negative pressure on the inner side of the annular paper feeding mechanism 3 and the annular paper guiding mechanism 4, so that each adsorption mechanism 5 adsorbs the kraft paper inside the annular paper feeding mechanism 3 and the annular paper guiding mechanism 4, and the outer surface of the kraft paper is tightly attached to the annular paper guiding mechanism 4. , the kraft paper is dragged for pre-wrapping under the drive of the annular paper feeding mechanism 3, so that the head end of the kraft paper is wrapped to overlap with the kraft paper on the strip notch 104, and a cylindrical kraft paper is formed to cover the strip notch 104, that is, the pre-wrapping is stopped; then, the external paper feeding robot places the whole stack of paper from the paper feeding port 101 into the cylindrical kraft paper, and the front paper clamping mechanism 11 and the rear paper clamping mechanism 12 temporarily clamp the upper and lower ends of the whole stack of paper along the up and down direction of the paper wrapping frame 1 and lift them up, then the external paper feeding robot releases the clamping of the whole stack of paper and withdraws from the cylindrical kraft paper, and the front paper clamping mechanism 11 and the rear paper clamping mechanism 12 place the whole stack of paper downward on the bottom of the inner cavity of the paper wrapping frame 1 while maintaining the clamping of the whole stack of paper. And press it tightly on the front end of the kraft paper, and then control the kraft paper to the outside of the paper feeding channel 103 for the first reverse paper drawing through the paper feeding device 2, so that the right side of the cylindrical kraft paper is attached to the right side of the whole stack of paper, and the top surface of the cylindrical kraft paper is attached to the top surface of the whole stack of paper; then, drive the paper pressing head 7 downward through the paper pressing drive mechanism 6, so that the bottom surface of the paper pressing head 7 passes through the paper pressing through hole 42 at the top of the annular paper guiding mechanism 4, and enters the interior of the paper wrapping frame 1 to press on the kraft paper on the top of the whole stack of paper, and presses the kraft paper tightly on the top of the whole stack of paper; then, control the kraft paper to the outside of the paper feeding channel 103 for the second reverse paper drawing through the paper feeding device 2, so that the left side of the cylindrical kraft paper is tightly attached to the whole stack of paper. The left side surface of the stack, the bottom surface of the tubular kraft paper and the head end of the kraft paper are all tightly attached to the bottom surface of the whole stack of paper, that is, the whole tubular kraft paper is tightened on the circumference of the whole stack of paper; then, the external paper discharging robot extends from the paper discharging stack opening 102 into the inner cavity of the paper wrapping frame 1, and clamps the whole stack of paper that has been wrapped, the front paper clamping mechanism 11 and the rear paper clamping mechanism 12 release the clamping of the upper and lower edges of the whole stack of paper, and the paper pressing drive mechanism 6 drives the paper pressing head 7 to move upward to release the pressure on the top of the whole stack of paper, and at the same time, the paper supporting end of the bottom supporting mechanism 8 rises from the strip notch 104 and supports the bottom of the whole stack of paper, and then the paper cutting end of the paper cutting mechanism 9 also rises from the strip notch 104 to cut off the end of the kraft paper at the bottom of the whole stack of paper;Finally, the external paper discharging robot takes out the wrapped whole stack of paper from the inner cavity of the paper wrapping frame 1 through the paper discharging opening 102.

[0049] The paper feeding device 2 generally needs to pull the paper back gently during the first reverse paper pulling in order to avoid excessive force so that the weight of the entire paper stack cannot hold down the leading end of the kraft paper, causing the leading end of the kraft paper to be pulled back from the bottom of the entire paper stack.

[0050] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A paper wrapping mechanism for a printed product packaging machine, characterized in that: It includes a paper wrapping frame, a paper feeding device, a ring-shaped paper feeding mechanism, a ring-shaped paper guiding mechanism, a paper pressing driving mechanism, a paper pressing head, a bottom supporting mechanism, a paper cutting mechanism and a plurality of adsorption mechanisms, as well as a front paper clamping mechanism and a rear paper clamping mechanism that can clamp and lift along the up and down directions of the paper wrapping frame; a paper feeding stack opening is arranged on the front side of the paper wrapping frame, and a paper discharging stack opening is arranged on the rear side of the paper wrapping frame; the ring-shaped paper feeding mechanism and the ring-shaped paper guiding mechanism are both arranged on the inner side of the paper wrapping frame, and each adsorption mechanism is evenly arranged on the circumference of the paper wrapping frame and is located on the outer side of the ring-shaped paper feeding mechanism and the ring-shaped paper guiding mechanism; a paper feeding channel is arranged on the lower right part of the paper wrapping frame, and the paper feeding device is installed on the paper wrapping frame and corresponds to the right end of the paper feeding channel; the ring-shaped paper feeding mechanism and the ring-shaped paper guiding mechanism A strip notch is provided at a corresponding position of the lower part of the paper wrapping frame, and the strip notch corresponds to the left end of the paper feeding channel; a paper pressing driving mechanism is installed on the outside of the paper wrapping frame, a power output end of the paper pressing driving mechanism is arranged downward, a paper pressing head is installed on the power output end of the paper pressing driving mechanism, a paper pressing through hole for the paper pressing head to pass through is provided on the top of the annular paper guiding mechanism, the paper pressing through hole is communicated with the inner cavity of the paper wrapping frame and corresponds to the strip notch; a bottom supporting mechanism and a paper cutting mechanism are both installed at the bottom of the paper wrapping frame, and the paper supporting end of the bottom supporting mechanism and the paper cutting end of the paper cutting mechanism are both in the strip notch; a front paper clamping mechanism is arranged at the paper feeding stack opening and at the front end of the strip notch, and a front paper clamping mechanism is arranged at the paper discharging stack opening and at the rear end of the strip notch; The annular paper feeding mechanism comprises a plurality of annular paper feeding units, each of which is arranged in the inner cavity of the paper wrapping frame along the circumference of the paper wrapping frame; the annular paper guiding mechanism comprises a plurality of annular paper guiding units, a guide interval is arranged between two adjacent annular paper feeding units, each annular paper guiding unit is arranged in a corresponding guide interval, and each of the adsorption mechanisms is located outside each guide interval; The annular paper feeding unit includes two rollers, multiple annular belts and a rotating drive device capable of driving one of the rollers to rotate. The two rollers are arranged parallel to each other in the inner cavity of the paper wrapping frame. Both rollers are provided with multiple annular grooves arranged at equal intervals. Each annular belt is tensioned in the corresponding annular groove on the two rollers to form an annular shape, and the guide gap is formed between two adjacent annular belts; one of the rollers is drivingly connected to the power output end of the rotating drive device.

2. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: The front paper clamping mechanism and the rear paper clamping mechanism both include an upper paper clamping cylinder, an upper clamping block, a lower paper clamping cylinder and a lower clamping block. The upper paper clamping cylinder is installed on the top of the paper wrapping frame, the piston rod of the upper paper clamping cylinder is arranged downward, and the upper clamping block is installed on the end of the piston rod of the upper paper clamping cylinder; the lower paper clamping cylinder is installed on the bottom of the paper wrapping frame, the piston rod of the lower paper clamping cylinder is arranged upward, and the lower clamping block is installed on the end of the piston rod of the lower paper clamping cylinder, and the lower clamping block is parallel to the upper clamping block and corresponds to it; the two upper paper clamping cylinders in the front paper clamping mechanism and the rear paper clamping mechanism are respectively located at the front and rear sides of the paper pressing drive mechanism, and the two lower paper clamping cylinders in the front paper clamping mechanism and the rear paper clamping mechanism are respectively located at the front and rear sides of the strip-shaped notch.

3. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: The bottom supporting mechanism comprises a paper supporting cylinder and a paper supporting seat, the paper supporting cylinder is installed at the bottom of the paper wrapping frame, the piston rod of the paper supporting cylinder is arranged upward, the paper supporting seat is installed on the end of the piston rod of the paper supporting cylinder, and the paper supporting seat is located in the strip-shaped gap; the paper cutting mechanism comprises a paper cutting cylinder and a cutter, the paper cutting cylinder is installed at the bottom of the paper wrapping frame, the piston rod of the paper cutting cylinder is arranged upward, the cutter is installed on the end of the piston rod of the paper cutting cylinder, and the cutter is located in the strip-shaped gap, and the blade of the cutter is arranged upward.

4. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: A tightening cylinder and a tightening auxiliary roller are provided at the paper inlet of the paper wrapping frame. The tightening cylinder is installed at the upper left part of the paper wrapping frame. The piston rod of the tightening cylinder faces the inner cavity of the paper wrapping frame. One end of the tightening auxiliary roller is connected to the end of the piston rod of the tightening cylinder, and the tightening auxiliary roller is parallel to the bottom surface of the paper wrapping frame.

5. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: The annular paper guide unit includes a paper stop guide plate, and the guide gap is formed between two adjacent annular belts. The paper stop guide plate is arranged in the corresponding guide gap, and the inner surface of the paper stop guide plate is lower than the inner surfaces of the two adjacent annular belts.

6. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: The paper pressing through hole is formed by a guide interval at the top of the paper wrapping frame, and the paper pressing head is formed by a plurality of strip-shaped pressing blocks, and a strip-shaped gap for the endless belt to enter is provided between two adjacent strip-shaped pressing blocks; The annular belt is a belt with a circular cross section, and the material of the belt is rubber; The paper wrapping frame comprises two annular frames and a plurality of supporting rods connected between the two annular frames, and both ends of each roller can be rotatably mounted on the two annular frames.

7. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: A guide base is provided at the lower right portion of the paper wrapping frame, the top surface of the guide base is a guide arc surface which bends gradually downward from right to left, a plurality of guide notches are provided at the upper right edge of the guide arc surface, and the lower ends of the annular belts on the right side of the inner cavity of the paper wrapping frame pass through the corresponding guide notches respectively; the paper feed channel is arranged in the guide base; the paper feed channel is gradually inclined upward from right to left.

8. The paper wrapping mechanism of the printed product packaging machine according to claim 1, characterized in that: There are four adsorption mechanisms, the first adsorption mechanism is arranged on the left side of the outside of the paper wrapping frame, the second adsorption mechanism is arranged on the upper left side of the outside of the paper wrapping frame, the third adsorption mechanism is arranged on the upper right side of the outside of the paper wrapping frame, and the fourth adsorption mechanism is arranged on the right side of the outside of the paper wrapping frame; the adsorption mechanism is a fan, the air outlet of the fan is arranged outward, and the air inlet of the fan corresponds to the outer sides of the annular paper feeding mechanism and the annular paper guiding mechanism.

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