Scratch-proof lower paper suction mechanism free of secondary paper feeding

Abstract

The utility model discloses an anti-scratch and secondary paper feeding-free lower paper suction mechanism, which relates to the technical field of carton production, and comprises a paper feeding conveying belt, a paper feeding cutter, a support frame and a negative pressure suction nozzle, stacked paperboards are supported on the paper feeding cutter and the support frame, the negative pressure suction nozzle is positioned below the paperboards, and the paper feeding cutter is positioned below the negative pressure suction nozzle. The negative pressure suction nozzle is connected to two crank arms capable of rotating through a cross beam, and the two crank arms are controlled by a lifting air cylinder to rotate respectively. According to the paper feeding device, secondary paper feeding is not needed, a paperboard is sucked downwards and pulled out and then directly falls on the paper feeding conveying belt, and the conveying belt directly sends out the paperboard. The lower paper sucking and feeding mechanism disclosed by the utility model is simpler in structure. According to the downdraft paper feeding mechanism, paper is fed one by one, so that the friction force between two corrugated boards moving relatively in the paper delivery process can be reduced, and the surfaces of the corrugated boards are prevented from being scratched.

Description

Technical Field

[0001] The utility model relates to the technical field of carton production, and particularly relates to a lower paper suction mechanism that can prevent scratching and avoid secondary paper feeding. Background Art

[0002] The carton gluing machine is a piece of equipment for one of the processes in carton production, mainly used for gluing corrugated cardboard. In the traditional production process, due to the limitation of the printing machine's format in the packaging industry, the paper box cannot be printed very large. Therefore, when producing a larger paper box, it is usually necessary to adopt the method of splicing two pieces of paper boxes into one paper box for production and processing. That is to say, in the production process, it is necessary to output a piece of corrugated cardboard through two paper feeding devices respectively, and then paste and splice the two pieces of corrugated cardboard.

[0003] There is a current lower paper suction feeding mechanism and a double - sheet carton gluing machine with Chinese patent application number 2024109623552. Its paper feeding method adopts a lower paper suction feeding mechanism. When the lower paper suction feeding mechanism feeds paper, it mainly drives the swing arm to swing upward through a yaw motor. The negative pressure suction nozzle on the fixed cross - beam will move to the bottom cardboard and suck the cardboard. The yaw motor drives the swing arm to swing downward to pull out the bottom cardboard. The paper feeding motor drives the lead screw module to drive the negative pressure suction nozzle on the fixed cross - beam. At this time, the cardboard on the negative pressure suction nozzle will move along, so that one end of the cardboard is inserted into the paper outlet. At this time, the negative pressure suction nozzle stops adsorbing the cardboard, and the cardboard will be sent to the next process by the conveyor belt. The above - mentioned lower paper suction feeding mechanism requires secondary paper feeding (after sucking the cardboard, the paper feeding motor needs to feed the paper for a certain distance, and the conveyor belt is for secondary paper feeding). Summary of the Invention

[0004] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a lower paper suction mechanism that can prevent scratching and avoid secondary paper feeding. The lower paper suction feeding mechanism of the utility model feeds paper sheet by sheet, so that it can reduce the friction between two relatively moving corrugated cardboards during the paper outlet process, thereby avoiding scratching the surface of the corrugated cardboard.

[0005] The purpose of the utility model is achieved by the following technical solutions: A lower paper suction mechanism that can prevent scratching and avoid secondary paper feeding, including a paper - feeding conveyor belt, a paper - feeding knife, and a support frame. The stacked cardboard is supported on the paper - feeding knife and the support frame. It also includes a negative pressure suction nozzle, which is connected to a vacuum pump through a hose. The negative pressure suction nozzle is located below the cardboard. The negative pressure suction nozzle is connected to two rotatable crank arms through a cross - beam. The two crank arms are respectively controlled to rotate by a lifting cylinder. When picking up the paper, the lifting cylinder drives the crank arm to rotate and swing upward. The negative pressure suction nozzle contacts the bottom - most cardboard. The vacuum pump is turned on, and the negative pressure suction nozzle sucks the cardboard. The lifting cylinder drives the crank arm to rotate downward, so that the cardboard contacts the paper - feeding conveyor belt. The vacuum pump is turned off, and the negative pressure nozzle cancels the adsorption of the cardboard. The paper - feeding conveyor belt conveys the cardboard.

[0006] As an improvement of the anti-scratch, secondary paper feeding-free lower paper suction mechanism of the utility model, the negative pressure suction nozzle is provided with a hollow screw, a fixing plate is passed through the screw, and the fixing plate is clamped and fixed by two upper and lower screws, and the screws are threadedly connected to the screw.

[0007] As an improvement of the scratch-resistant and secondary paper-feeding-free lower paper suction mechanism of the utility model, the other end of the fixing plate is fixedly mounted on the crossbeam by screws.

[0008] As an improvement of the scratch-resistant and secondary paper-feed-free lower paper suction mechanism of the utility model, it also includes two side mounting plates, and the two lifting cylinders are respectively mounted on the inner side surfaces of the side mounting plates.

[0009] As an improvement of the scratch-resistant and secondary paper-feeding-free lower paper suction mechanism of the utility model, a connecting seat is provided at the end of the piston rod of the lifting cylinder, and the connecting seat is movably connected to the crank arm through a rotating shaft.

[0010] As an improvement of the scratch-resistant and secondary paper-feeding-free lower paper suction mechanism of the utility model, it also includes a bottom frame, the paper feeding conveyor belt is installed on the bottom frame, and frame side panels are respectively provided on both sides of the bottom frame. One end of the curved arm is movably connected to the frame side panel through a rotating shaft, and the curved arm can rotate and swing around the rotating shaft.

[0011] As an improvement of the scratch-resistant and secondary paper-feeding-free lower paper suction mechanism of the utility model, the paper feeding conveyor belt is installed on two roller shafts, a synchronous wheel is set at one end of one roller shaft, and the synchronous wheel is connected to the active synchronous wheel on the motor output shaft through a synchronous belt.

[0012] As an improvement of the scratch-resistant and secondary paper-feeding-free lower paper suction mechanism of the utility model, a push-up shaft is provided on one side of the paper feed knife, one end of the paperboard pushes against the push-up shaft, and the horizontal height of the push-up shaft is lower than the horizontal height of the support frame.

[0013] As an improvement of the anti-scratch and secondary paper feeding-free lower paper suction mechanism of the utility model, the support frame includes a bottom bracket, a support shaft is provided at the upper end of the bottom bracket, the cardboard is mounted on the support shaft and the top shaft, and when the negative pressure suction nozzle sucks the cardboard and pulls it downward, the two ends of the cardboard will break away from the support of the support shaft and the top shaft and directly fall onto the paper feeding conveyor belt.

[0014] As an improvement of the scratch-resistant and secondary paper-feed-free lower paper suction mechanism of the utility model, a paper feed channel is provided between the bottom of the paper feed knife and the paper feed conveyor belt, and the paperboard conveyed by the paper feed conveyor belt is delivered from the paper feed channel.

[0015] The beneficial effects of the present utility model are as follows: The present utility model does not require secondary paper feeding. After the cardboard is sucked and pulled out downward and directly falls on the paper feeding conveyor belt, the conveyor belt directly sends out the cardboard. The structure of the downward suction paper feeding mechanism of the present utility model is simpler. The downward suction type paper feeding mechanism of the present utility model feeds paper sheet by sheet, enabling it to reduce the friction between two relatively moving corrugated papers during the paper feeding process, thereby avoiding scratching the surface of the corrugated paper. Brief Description of the Drawings

[0016] Figure 1 is a perspective view of the present utility model with the crank arm not swung upward and installed on the frame;

[0017] Figure 2 is a perspective view of the present utility model with the crank arm swung upward and installed on the frame;

[0018] Figure 3 is a structural diagram of the present utility model with the crank arm not swung upward;

[0019] Figure 4 is a structural schematic diagram of the present utility model with the crank arm swung upward for paper suction;

[0020] The reference numerals are: 1, paper feeding conveyor belt; 2, paper feeding knife; 3, support frame; 4, cardboard; 5, negative pressure suction nozzle; 6, cross beam; 7, crank arm; 8, lifting cylinder; 9, side mounting plate; 10, connecting seat; 11, bottom frame; 12, frame side plate; 13, roller shaft; 14, paper feeding channel; 21, abutting shaft; 31, bottom bracket; 32, support shaft; 51, screw; 52, fixing plate; 53, screw. Detailed Description of the Preferred Embodiment

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] As Figures 1-4 shown, a lower paper suction mechanism for preventing scratching and eliminating secondary paper feeding includes a paper feeding conveyor belt 1, a paper feeding knife 2, and a support frame 3. The stacked paperboards 4 are supported on the paper feeding knife 2 and the support frame 3. It further includes a negative pressure suction nozzle 5, and the negative pressure suction nozzle 5 is connected to a vacuum pump (not shown in the figure) through a hose. The negative pressure suction nozzle 5 is located below the paperboard 4, and the negative pressure suction nozzle 5 is connected to two rotatable crank arms 7 through a cross beam 6. The two crank arms 7 are respectively controlled to rotate by a lifting cylinder 8. When picking up the paper, the lifting cylinder 8 drives the crank arm 7 to rotate and swing upward. The negative pressure suction nozzle 5 contacts the bottommost paperboard 4, the vacuum pump is turned on, the negative pressure suction nozzle 5 sucks the paperboard 4, the lifting cylinder 8 drives the crank arm 7 to rotate downward, so that the paperboard 4 contacts the paper feeding conveyor belt 1, the vacuum pump is turned off, the negative pressure air nozzle 5 cancels the adsorption of the paperboard 4, and the paper feeding conveyor belt 1 conveys the paperboard.

[0025] Preferably, the negative pressure suction nozzle 5 is provided with a hollow screw 51, and a fixing plate 52 is penetrated through the screw 51. The fixing plate 52 is clamped and fixed by two upper and lower screws 53, and the screws 53 are screwed with the screw 51.

[0026] Preferably, the other end of the fixing plate 52 is fixedly installed on the cross beam 6 through screws. A screw installation groove is provided on the cross beam 6, and the screws can adjust the installation position on the screw installation groove.

[0027] Preferably, it further includes two side mounting plates 9, and the two lifting cylinders 8 are respectively installed on the inner side surfaces of the side mounting plates 9.

[0028] Preferably, a connecting seat 10 is provided at the end of the piston rod of the lifting cylinder 8, and the connecting seat 10 is movably connected to the crank arm 7 through a rotating shaft.

[0029] Preferably, it further includes a bottom frame 11, the paper feeding conveyor belt 1 is installed on the bottom frame 11, frame side plates 12 are respectively provided on both sides of the bottom frame 11, and one end of the crank arm 7 is movably connected to the frame side plate 12 through a rotating shaft, and the crank arm 7 can rotate and swing around the rotating shaft as the center.

[0030] Preferably, the paper feeding conveyor belt 1 is installed on two rollers 13. One end of one of the rollers 13 is provided with a synchronous pulley, and the synchronous pulley is connected to the driving synchronous pulley on the output shaft of the motor through a synchronous belt.

[0031] Preferably, one side of the paper feeding knife 2 is provided with a resisting shaft 21. One end of the cardboard 4 abuts against the resisting shaft 21, and the horizontal height of the resisting shaft 21 is lower than the horizontal height of the support frame 3.

[0032] Preferably, the support frame 3 includes a bottom support 31. A support shaft 32 is provided at the upper end of the bottom support 31. The cardboard 4 is erected on the support shaft 32 and the resisting shaft 21. When the negative pressure suction nozzle 5 sucks the cardboard 4 and pulls it downward, both ends of the cardboard 4 will break away from the supports of the support shaft 32 and the resisting shaft 211 and directly fall onto the paper feeding conveyor belt 1.

[0033] Preferably, there is a paper feeding channel 14 between the bottom of the paper feeding knife 2 and the paper feeding conveyor belt 1, and the cardboard 4 conveyed by the paper feeding conveyor belt 1 is sent out from the paper feeding channel 14.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and structures of the present invention. The scope of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A bottom paper suction mechanism for preventing scratching and eliminating secondary paper feeding, comprising a paper feeding conveyor belt, a paper feeding knife and a support frame, with stacked cardboard supported on the paper feeding knife and the support frame, characterized in that, It further includes a negative pressure suction nozzle which is located below the cardboard. The negative pressure suction nozzle is connected to two rotatable crank arms through a cross beam, and the two crank arms are respectively controlled to rotate by a lifting cylinder.

2. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 1, characterized in that A hollow screw is provided on the negative pressure suction nozzle, and a fixing plate is sleeved on the screw. The fixing plate is clamped and fixed by two screws, one above and the other below, and the screws are screwed with the screw.

3. The down-drawing paper mechanism for preventing scratching and eliminating secondary paper feeding according to claim 2, wherein The other end of the fixing plate is fixedly installed on the cross beam by screws.

4. The under-suction paper mechanism for scratch prevention and free secondary paper feeding according to claim 1, characterized in that, It further includes two side mounting plates, and the two lifting cylinders are respectively installed on the inner sides of the side mounting plates.

5. The down-drawing paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 1, characterized in that A connecting seat is provided at the end of the piston rod of the lifting cylinder, and the connecting seat is movably connected to the crank arm through a rotating shaft.

6. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 1, characterized in that, It further includes a bottom frame. The paper feeding conveyor belt is installed on the bottom frame. Frame side plates are respectively provided on both sides of the bottom frame. One end of the crank arm is movably connected to the frame side plate through a rotating shaft, and the crank arm can rotate and swing around the rotating shaft.

7. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 1, characterized in that The paper feeding conveyor belt is installed on two roller shafts. A synchronous pulley is provided at one end of one of the roller shafts, and the synchronous pulley is connected to the driving synchronous pulley on the output shaft of the motor through a synchronous belt.

8. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 1, characterized in that, A resisting shaft is provided on one side of the paper feeding knife, and one end of the cardboard abuts against the resisting shaft. The horizontal height of the resisting shaft is lower than the horizontal height of the support frame.

9. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 8, characterized in that, The support frame includes a bottom bracket, and a support shaft is provided at the upper end of the bottom bracket. The cardboard is placed on the support shaft and the resisting shaft. When the negative pressure suction nozzle sucks the cardboard and pulls it downwards, both ends of the cardboard will break away from the support of the support shaft and the resisting shaft and directly fall on the paper feeding conveyor belt.

10. The under-suction paper mechanism for scratch prevention and avoiding secondary paper feeding according to claim 9, characterized in that, There is a paper feeding channel between the bottom of the paper feeding knife and the paper feeding conveyor belt, and the cardboard conveyed by the paper feeding conveyor belt is sent out from the paper feeding channel.

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