A paper feeding device

Abstract

The present invention discloses a paper-feeding device, including a fixed frame, a paper-feeding air duct, and a pipeline system. The paper-feeding air duct and the pipeline system are connected to the fixed frame, the air inlet end of the pipeline system is connected to a compressed gas device, and the air outlet end of the pipeline system extends to the inside of the paper-feeding air duct, forming a structure in which paper enters from one end of the paper-feeding air duct and is blown to the other end of the paper-feeding air duct by the airflow flowing out of the pipeline system. Compressed gas enters, exits, and enters the inside of the paper-feeding air duct through the pipeline system, thereby using air blowing to feed paper and using air kinetic energy to drive the movement of paper in the paper-feeding air duct, which is energy-saving and environmentally friendly, has high paper-feeding quality, is free from manual paper-feeding, and protects personal safety.

Description

Technical Field

[0001] The invention relates to the technical field of paper feeding of a paper reel, and in particular to a paper feeding device. Background Art

[0002] In the process of toilet paper production, after the toilet paper is dried in the toilet paper machine drying cylinder, it needs to be rolled into rolls for sale. There is a paper reel after the toilet paper machine drying cylinder to roll the toilet paper onto the paper reel of the paper reel. The technology of guiding the paper from the toilet paper machine drying cylinder to the paper reel for winding is called paper guiding technology.

[0003] There are two commonly used existing paper-feeding technologies, one is rope-wheel paper-feeding and the other is manual paper-feeding. The rope-wheel paper-feeding device is composed of a rubber roller, a paper-feeding rope wheel and other parts. Due to the need for paper-feeding, the paper-feeding strip is required to be reliably clamped in the middle of the paper-feeding rope in an ideal manner to achieve paper-feeding and quickly transfer from the paper-feeding rope to the surface of the rubber roller. However, due to the thinness of toilet paper, the toilet paper cannot be firmly clamped in the middle of the paper-feeding rope during rope-wheel paper-feeding, and the paper-feeding effect is not ideal. For manual paper-feeding, it is directly operated manually, and the paper-feeding head of the hand-held toilet paper is rolled onto the paper-reeling roll. However, during this process, the paper-reeling machine runs at high speed and manual operation is easy to cause production accidents. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the paper-feeding effect of the existing paper-feeding technology is not ideal, and manual operation is prone to cause production accidents. The purpose is to provide a paper-feeding device that solves the technical problems of poor paper-feeding effect, inconvenient operation, and safety hazards caused by manual operation.

[0005] The present invention is achieved through the following technical solutions:

[0006] A paper feeding device comprises a fixed frame, a paper feeding air duct, and a pipeline system, wherein the paper feeding air duct and the pipeline system are connected to the fixed frame, an air inlet end of the pipeline system is connected to a compressed gas device, and an air outlet end of the pipeline system extends to the inside of the paper feeding air duct, forming a structure in which paper enters from one end of the paper feeding air duct and is blown to the other end of the paper feeding air duct by the airflow flowing out of the pipeline system.

[0007] Preferably, a fixing plate A and a fixing plate B are provided on the same side of the fixing frame, and a welding assembly is fixed on each of the fixing plates A and B. Each of the welding assemblies extends to the bottom of the paper guide air duct and supports the paper guide air duct, and the piping system is located between the fixing plates A, B and the paper guide air duct.

[0008] Preferably, the paper feeding air duct consists of a first air duct, a second air duct, and a third air duct, each of the channels is a frame structure surrounded by a plate body, the first air duct and the third air duct are fixedly connected to the welding assembly, the second air duct is connected between the first air duct and the third air duct, and the ends of the first air duct and the third air duct away from the second air duct are set at an angle to the second air duct, and the paper enters from the first air duct and is transported in the direction of the third air duct.

[0009] Preferably, the second air duct is horizontally arranged, one end of the two plates of the second air duct is overlapped between the two plates of the third air duct, and one end of the two plates of the first air duct is overlapped between the other ends of the two plates of the second air duct. A rotating hinge assembly is provided on the fixed plate B, one end of the rotating hinge assembly is connected to the first air duct, and the other end is connected to the second air duct, forming a structure in which the rotating hinge assembly drives the second air duct to rotate relative to the first air duct and the third air duct, and each airflow tube in the pipeline system is made of soft material.

[0010] Preferably, the pipeline system includes a first gas circuit joint, a ball valve, a three-way pipe, a first gas branch, and a second gas branch. One end of the first gas circuit joint is connected to the compressed gas device, and the other end is connected to the ball valve. The ball valve is connected to the three-way pipe, and the three-way pipe is fixed on the fixed plate B. The two ventilation ends of the three-way pipe are connected to the first gas branch and the second gas branch respectively.

[0011] The first gas branch includes a plurality of ventilation pipes and air nozzles, one end of each ventilation pipe is connected to the three-way pipe, the end of each ventilation pipe is connected to a corresponding air nozzle, each air nozzle extends into a corresponding paper guide air duct, and each ventilation pipe is connected to the fixed plate B;

[0012] One end of the ventilation pipe of the second gas branch is connected to the three-way pipe, and the other end is connected to the hand valve. The two ventilation ends of the hand valve are respectively connected to the two air pipes of the rotating hinge assembly. The hand valve is fixed on the fixed plate B.

[0013] Preferably, a pressure reducing valve is further provided on the ventilation pipe of the second gas branch, and the pressure reducing valve is fixed on the fixing plate B.

[0014] Preferably, each ventilation pipe on the first gas branch is also provided with a speed regulating valve, and each speed regulating valve is fixedly connected to the corresponding ventilation pipe and gas nozzle.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] (1) A paper threading device provided by an embodiment of the present invention is provided with a paper threading air duct and a pipeline system. Compressed gas enters and exits the pipeline system and enters the inside of the paper threading air duct, so that paper is threaded by blowing air and the kinetic energy of air is used to drive the paper to move in the paper threading air duct. The invention is energy-saving and environmentally friendly, has high paper threading quality, does not require manual paper threading, and protects personal safety.

[0017] (2) A paper feeding device provided in an embodiment of the present invention is provided with a fixing plate and a welding assembly to fix the paper feeding air duct and the pipe system to ensure the structural stability of the device.

[0018] (3) A paper feeding device provided by an embodiment of the present invention is provided with a first air duct, a second air duct, and a third air duct, and the ends of the first air duct and the third air duct away from the second air duct are arranged at an angle with the second air duct, and the first air duct and the third air duct are both inclined upward. Paper enters through the end of the first air duct away from the second air duct. Since the first air duct is arranged inclined, the structural potential energy is utilized and the paper moves downward following the inclined direction of the first air duct when entering the first air duct, thereby accelerating the transmission speed and facilitating the paper to enter the first air duct. When the paper reaches the third air duct, since the paper needs to enter the subsequent roll on the paper reel, the moving speed of the paper needs to be reduced when the paper comes out of the third air duct. The third air duct is inclined upward and the speed can be reduced by utilizing the structural potential energy.

[0019] (4) A paper feeding device provided in an embodiment of the present invention is provided with a second air duct which is overlapped with the first air duct and the third air duct so that the second air duct can rotate, and a rotating hinge assembly is provided on the fixed plate B. The rotating hinge assembly is used to drive the second air duct to rotate, so that the paper feeding device provided in the embodiment of the present invention cooperates with the scanning frame, which can realize paper feeding without interfering with the movement of the scanning head on the scanning frame.

[0020] (5) A paper feeding device provided by an embodiment of the present invention is provided with a first gas path joint, a ball valve, a three-way pipe, a first gas branch, and a second gas branch. The gas nozzles at the end of the first gas branch are fixed on each air duct and extend to the inside of each air duct to provide a channel for compressed gas to flow to each air duct. The end of the second gas branch is connected to the air inlet pipe of the rotating hinge assembly, and the air inlet of different air inlet pipes is used to control the rotation direction of the fixed seat in the rotating hinge assembly, thereby controlling the rotation direction of the second air duct.

[0021] (6) In an embodiment of the present invention, a paper feeding device is provided, in which a pressure reducing valve is arranged on the second gas branch to provide compressed gas of a specific pressure to the cylinder of the rotating hinge assembly, thereby realizing reliable rotation of the second air duct.

[0022] (7) In an embodiment of the present invention, a paper feeding device is provided, in which a speed regulating valve is arranged on the first gas branch to facilitate the control of the speed of the air flow flowing into each air duct, which is convenient for practical application.

[0023] (8) The paper feeding device provided in the embodiment of the present invention has a simple structure, is easy to produce, and is easy to assemble and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 A schematic structural diagram of a paper feeding device provided in an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a paper feeding device provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a partial structure of a paper feeding device provided by an embodiment of the present invention after removing the fixing plate B;

[0028] Figure 4 A schematic structural diagram of a rotating hinge assembly of a paper feeding device provided in an embodiment of the present invention.

[0029] Marks and corresponding parts names in the attached drawings:

[0030] 1-fixed frame, 201-first air duct, 202-second air duct, 203-third air duct, 401-fixed plate A, 402-fixed plate B, 5-welding assembly, 6-rotating hinge assembly, 601-connecting sleeve, 602-pin shaft, 603-fixed seat, 604-cylinder bracket, 605-adjusting bracket, 606-rotating cylinder, 607-intake pipe, 608-connecting bolt, 7-ball valve, 8-tee Pipe, 901-first gas circuit connector, 902-first main pipe, 903-second gas circuit connector, 904-reducing threaded five-way head, 905-reducing five-way head, 906-first branch pipe, 907-speed regulating valve, 908-internal thread connector, 909-gas nozzle, 910-second branch pipe, 911-third branch pipe, 101-threaded two-way head, 102-pressure reducing valve, 103-threaded straight head, 104-hand valve. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0033] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0035] Example

[0036] like Figure 1-Figure 4 A paper-feeding device comprises a fixed frame 1, a paper-feeding air duct, and a pipeline system. The paper-feeding air duct and the pipeline system are connected to the fixed frame 1. The air inlet end of the pipeline system is connected to a compressed gas device, and the air outlet end of the pipeline system extends to the inside of the paper-feeding air duct, forming a structure in which paper enters from one end of the paper-feeding air duct and is blown to the other end of the paper-feeding air duct by the airflow flowing out of the pipeline system.

[0037] A fixing plate A 401 and a fixing plate B 402 are provided on the same side of the fixing frame 1. The fixing plate A 401 is fixed to one end of the fixing frame 1, and the fixing plate B 402 is fixed to the other end of the fixing frame 1. The fixing plates A 401 and B can be connected to the fixing frame 1 by flange bolts. A welding assembly 5 is fixed on both the fixing plates A 401 and B 402. The welding assembly 5 serves as a supporting and fixing structure of the paper feeding device, connects the paper feeding air duct, the pipeline system and the fixing frame 1, and serves as a supporting structure of the paper feeding device to stabilize the overall stability of the paper feeding device. The welding assembly 5 can be provided as required and is composed of multiple components, which will not be described in detail here.

[0038] According to the needs, the fixed plates A 401 and B are fixedly connected with the welding components 5, each welding component 5 extends to the bottom of the paper guide air duct and supports the paper guide air duct, and can also extend to the top of the paper guide air duct to play a certain clamping role. The pipeline system is located between the fixed plate A 401, the fixed plate B 402 and the paper guide air duct.

[0039] The paper feeding duct consists of the first duct 201, the second duct 202, and the third duct 203. Each duct is a frame structure surrounded by a plate body. Each duct has two plates, and the two plates can be fixedly connected together by a rod body. The first duct 201 and the third duct 203 are both fixedly connected to the welding assembly 5 and are located above the welding assembly 5. The second duct 202 is located between the first duct 201 and the third duct 203. The second duct 202 can be fixedly connected to the first duct 201 and the third duct 203, or it can be set as needed. The ends of the first duct 201 and the third duct 203 away from the second duct 202 are set at an angle to the second duct 202. Paper can be conveyed from one end of the duct to the other end as needed. For example, paper enters from the first duct 201 and is conveyed to the third duct 203 through the action of the pipeline system and enters the subsequent process. Specifically, the angles between the first air duct 201, the third air duct 203 and the second air duct 202 can be set as needed. In one or more embodiments, the second air duct 202 is set horizontally, and the first air duct 201 and the third air duct 203 are both provided with horizontal sections and inclined sections. The inclined section of the first air duct 201 is oriented toward the direction of the second air duct 202, and the angle with the horizontal line is an obtuse angle. Similarly, the inclined section of the third air duct 203 is oriented toward the direction of the first air duct 201, and the angle with the horizontal line is an obtuse angle. Each horizontal section is connected to the second air duct 202. In order to more smoothly convey the paper in the paper feeding air duct and to cooperate well with the subsequent processes, the inclined sections of the first air duct 201 and the third air duct 203 are both inclined upward, and the third air duct 203 is set in a Z shape, and the spacing between the plates of each channel gradually decreases along the direction from the first air duct 201 to the third air duct 203.

[0040] In one or more embodiments, one end of the two plates of the second air duct 202 is overlapped between the two plates of the third air duct 203, and one end of the two plates of the first air duct 201 is overlapped between the other ends of the two plates of the second air duct 202. A rotating hinge assembly 6 is provided on the fixed plate B 402, and one end of the rotating hinge assembly 6 is connected to the first air duct 201, and the other end is connected to the second air duct 202, forming a structure in which the rotating hinge assembly 6 drives the second air duct 202 to rotate relative to the first air duct 201 and the third air duct 203. Each airflow pipe in the pipeline system is made of soft material, such as a plastic hose.

[0041] The pipeline system includes a first gas circuit connector 901, a ball valve 7, a three-way pipe 8, a first gas branch, and a second gas branch. The ball valve 7 is a two-piece type. One end of the first gas circuit connector 901 is connected to a compressed gas device, and the other end is connected to the ball valve 7. The compressed gas device is an external device used to provide compressed gas to enter the pipeline system. The ball valve 7 is connected to the three-way pipe 8, and the three-way pipe 8 is fixed on the fixed plate B 402, and the two ventilation ends of the three-way pipe 8 are respectively connected to the first gas branch and the second gas branch;

[0042] The first gas branch includes a plurality of interconnected ventilation pipes and air nozzles 909. One end of each ventilation pipe is connected to the three-way pipe 8. The end of each ventilation pipe is connected to the corresponding air nozzle 909. Each air nozzle 909 extends into the corresponding paper-leading air duct. Specifically, the number of air nozzles 909 in each channel, such as the first air duct 201, the second air duct 202, and the third air duct 203, is set as required, and corresponding ventilation pipes are set accordingly to provide a circulation channel for compressed gas for each air nozzle 909. The gas outlets of each air nozzle 909 are oriented in the same direction. Preferably, the outlets of the air nozzles 909 are inclined upward in the direction of paper movement. Each ventilation pipe is connected to the fixed plate B 402; one end of the ventilation pipe of the second gas branch is connected to the three-way pipe 8, and the other end is connected to the hand valve 104. The two ventilation ends of the hand valve 104 are respectively connected to the two air pipes of the rotating hinge assembly 6. The hand valve 104 is fixed on the fixed plate B 402. The ventilation pipe of the second gas branch is also provided with a pressure reducing valve 102, which is fixed on the fixing plate B402. Each ventilation pipe on the first gas branch is also provided with a speed regulating valve 907, and each speed regulating valve 907 is fixedly connected to the corresponding ventilation pipe and gas nozzle 909.

[0043] Each ventilation pipe can be directly connected to the three-way pipe 8, and can also be connected to the three-way pipe 8 through its components.

[0044] For example, the three-way pipe 8 is divided into two paths, one of which is connected in sequence to the ball valve 7, the first gas circuit connector 901, the first main pipe 902, and the second gas circuit connector 903; the second gas circuit connector 903 is divided into two paths, one of which is connected in sequence to the reducing threaded five-way head 904 and the reducing threaded five-way head 905; the reducing threaded five-way head 904 is divided into three branches, two of which are connected in sequence to the first branch pipe 906, the speed regulating valve 907, the internal threaded connector 908, and the air nozzle 909, and the air nozzle 909 is fixed to the plate body of the first air duct 201; the other branch is connected in sequence to the first branch pipe 906, the speed regulating valve 907, the internal threaded connector 908, and the air nozzle 909 is fixed to the plate body of the second air duct 202. The reducing five-way connector 905 is divided into four paths, one of which is sequentially connected to the second branch pipe 910, the speed regulating valve 907, the internal thread joint 908, and the gas nozzle 909, and the gas nozzle 909 is fixed to the second air duct 202, and the other three paths are sequentially connected to the third branch pipe 911, the speed regulating valve 907, the internal thread joint 908, and the gas nozzle 909 is fixed to the plate body of the third air duct 203. Together, they constitute the first gas branch.

[0045] The other path of the three-way pipe 8 is connected in sequence to the threaded two-way head 101, the pressure reducing valve 102, the threaded two-way head 101, the threaded straight head 103, and the hand valve 104. The hand valve 104 is a three-position two-way valve. In addition to being connected to the three-way pipe 8, the hand valve 104 is also divided into two paths, which are respectively connected to the two air inlet pipes 607 of the rotating hinge assembly 6 to control the rotation of the rotating hinge assembly 6. Together, they constitute the second gas branch.

[0046] The rotating hinge assembly 6 is specifically composed of a connecting sleeve 601, a pin shaft 602, two fixed seats 603, a cylinder bracket 604, an adjusting bracket 605, a rotary cylinder 606, two air inlet pipes 607, and a connecting bolt 608. One fixed seat 603 is fixedly connected to the upper and lower plates of the first air duct 201, and the other fixed seat 603 is fixedly connected to the upper and lower plates of the second air duct 202. The connecting plate is fixed to the two fixed seats 603 and is located on both sides of the pin shaft 602 and is fixedly connected to the pin shaft 602. The connecting sleeve 601 is fixed to the outside of the pin shaft 602, and the two air inlet pipes 607 are respectively connected to the two ends of the manual valve 104. When in use, by controlling the open end of the hand valve 104, according to the direction selected, one air intake pipe 607 is controlled to intake air while the other air intake pipe 607 is not controlled to intake air, and the movable part can be pushed from two directions to push the adjustment bracket 605, so that the air intake of different air intake pipes 607 causes the rotary cylinder 606 to be pushed by air pressure in two directions, thereby causing the pin shaft 602 to rotate in two directions, thereby driving the fixed seat 603 fixedly connected to the second air duct 202 to rotate in two directions.

[0047] The rotating hinge assembly 6 may also be composed of other components, as long as it can achieve the fixation of the fixing base 603 and the air duct and drive the bidirectional rotation of the fixing base 603, which will not be described in detail here.

[0048] The blowing and paper threading process of the embodiment of the present invention is as follows: when the toilet paper is dried in the drying cylinder and scraped off from the surface by the drying cylinder scraper, a section of toilet paper head is taken and placed at the entrance of the first air duct 201, the lower valve of the ball valve 7 is opened, and the compressed gas of the compressed gas device in the factory is introduced into the paper threading system through the ball valve 7, and then the upper valve of the ball valve 7 is opened, and the compressed gas passes through the first gas path joint 901 and the second gas path joint 903 in sequence, and then is divided into two paths, one of which enters the reducing threaded five-way head 904 and the reducing threaded five-way head 905, and the reducing threaded five-way head 904 is further divided into three branches, among which the compressed gas of two branches flows through the first branch pipe 906, the speed regulating valve 907, the internal thread joint 908, and the air nozzle 909 in sequence to enter the first air duct 201, and the compressed gas of the other branch flows through the first branch pipe 906, the speed regulating valve 907, the internal thread joint 908, and the air nozzle 909 in sequence to enter the second air duct 202. The reducing five-way head 905 is divided into four branches, and the compressed gas flowing into the reducing five-way head 905 is also divided into four branches. One branch flows into the second branch pipe 910, the speed regulating valve 907, the internal threaded joint 908, and the air nozzle 909 in sequence to enter the second air duct 202, and the other three branches flow through the third branch pipe 911, the speed regulating valve 907, the internal threaded joint 908, and the air nozzle 909 in sequence to enter the third air duct 203. In this way, the seven air nozzles 909 add air pressure to the paper guiding air duct, and the thin toilet paper is subjected to the wind pressure and moves forward. After multiple wind pressures, the toilet paper is blown out of the third air duct 203 and onto the surface of the subsequent paper rolling cylinder. Since the toilet paper in the air duct moves slowly, the speed of the toilet paper reaching the paper rolling cylinder increases, and the toilet paper runs faster and is quickly rolled onto the paper rolling roller above the paper rolling cylinder. At the same time, the toilet paper remaining in the air duct is pulled out of the air duct due to the speed difference. The toilet paper head that is taken at the beginning automatically restores its original width under the rapid pulling of the toilet paper rolled onto the paper rolling rod, and is smoothly rolled onto the paper rolling cylinder. Thus, the paper guiding function of the toilet paper is realized. At the same time, each air nozzle 909 is connected to the speed regulating valve 907, which can adjust the gas flow rate in the air duct, and then realize the transmission of toilet paper at different speeds.

[0049] An embodiment of the present invention provides a paper feeding device that cooperates with a scanning frame to perform avoidance operations as follows:

[0050] Since a scanning frame is installed between the drying cylinder and the paper reel cylinder of the toilet paper machine, and the scanning frame is a high-end precision instrument that is not allowed to be collided, a paper feeding device in an embodiment of the present invention passes through the scanning frame, and the scanning head of the scanning frame moves left and right. The paper feeding device will interfere with the movement of the scanning head, so the paper feeding device is required to avoid it.

[0051] The specific operation is as follows: when the scanning frame needs to work, the toilet paper machine scanning frame is first paused, the scanning frame scanning head is reset, and the lower valve of the ball valve 7 is opened. The compressed gas is introduced into the paper feeding system, enters the three-way pipe 8 through the first gas path connector 901, and then enters the second gas branch, that is, it flows through the threaded two-way head 101, the pressure reducing valve 102, the threaded two-way head 101, the threaded straight head 103, and the hand valve 104 in sequence. Since the hand valve 104 is a three-position two-way valve, one end of the hand valve 104 controls the air intake and allows the compressed gas to enter. The two outer ends of the hand valve 104 are connected to the two air inlet pipes 607 of the rotating hinge assembly 6 for air intake. Only one air inlet pipe 607 is allowed to be connected at a time. When the rotating hinge assembly is subjected to a thrust on one side, the second air duct 202 will be driven to rotate 90 degrees in the horizontal direction away from the fixed plate, and then the hand valve 104 is closed. The space vacated is provided for the scanning head to move, and the scanning frame works normally. When paper feeding begins, the scanning frame is paused, the scanning head of the scanning frame is controlled to reset, the manual valve 104 is opened and rotated to another opening position, the other air inlet pipe 607 is controlled to intake air, and the rotating hinge assembly 6 is subjected to reverse thrust, so that the second air duct 202 is driven to rotate 90 degrees in the horizontal direction close to the fixed plate and reset to its original position. At this time, the scanning frame continues to be shut down, and after paper feeding is completed, the above actions are repeated as needed to control the rotation of the second air duct 202, the movement of the scanning head, and other steps.

[0052] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A paper feeding device, characterized in that: It comprises a fixed frame (1), a paper guide air duct, and a pipe system, wherein the paper guide air duct and the pipe system are connected to the fixed frame (1), the air inlet end of the pipe system is connected to a compressed gas device, and the air outlet end of the pipe system extends to the inside of the paper guide air duct, forming a structure in which paper enters from one end of the paper guide air duct and is blown to the other end of the paper guide air duct by the airflow flowing out of the pipe system; A fixing plate A (401) and a fixing plate B (402) are provided on the same side of the fixing frame (1), and the paper guiding air duct comprises a first air duct (201), a second air duct (202), and a third air duct (203); The fixed plate B (402) is provided with a rotating hinge assembly (6), one end of the rotating hinge assembly (6) is connected to the first air duct (201), and the other end is connected to the second air duct (202), forming a structure in which the rotating hinge assembly (6) drives the second air duct (202) to rotate relative to the first air duct (201) and the third air duct (203); The rotating hinge assembly (6) is composed of a connecting sleeve (601), a pin shaft (602), two fixing seats (603), a cylinder bracket (604), an adjusting bracket (605), a rotary cylinder (606), two air inlet pipes (607), and connecting bolts (608); one fixing seat (603) is fixedly connected to the upper and lower plates of the first air duct (201); the other fixing seat (603) is fixedly connected to the upper and lower plates of the second air duct (202); a connecting plate is fixed to the two fixing seats (603) at both sides of the pin shaft (602) and is fixedly connected to the pin shaft (602); the connecting sleeve (601) is fixed to the outside of the pin shaft (602); and the two air inlet pipes (607) are respectively connected to the two ends of the hand valve.

2. The paper feeding device according to claim 1, characterized in that: A welding assembly (5) is fixedly mounted on each of the fixing plates A (401) and B (402); each of the welding assemblies (5) extends below the paper guide air duct and supports the paper guide air duct; and the pipe system is located between the fixing plates A (401), B (402) and the paper guide air duct.

3. The paper feeding device according to claim 2, characterized in that: Each air duct is a frame structure surrounded by a plate body; the first air duct (201) and the third air duct (203) are both fixedly connected to the welding assembly (5); the second air duct (202) is connected between the first air duct (201) and the third air duct (203); ends of the first air duct (201) and the third air duct (203) away from the second air duct (202) are both arranged at an angle to the second air duct (202); paper enters from the first air duct (201) and is transported in the direction of the third air duct (203).

4. The paper feeding device according to claim 3, characterized in that: The second air duct (202) is arranged horizontally, one end of the two plates of the second air duct (202) is overlapped between the two plates of the third air duct (203), one end of the two plates of the first air duct (201) is overlapped between the other ends of the two plates of the second air duct (202), and each air flow tube in the pipeline system is made of soft material.

5. The paper feeding device according to claim 4, characterized in that: The pipeline system comprises a first gas circuit connector (901), a ball valve (7), a three-way pipe (8), a first gas branch, and a second gas branch; one end of the first gas circuit connector (901) is connected to the compressed gas device, and the other end is connected to the ball valve (7); the ball valve (7) is connected to the three-way pipe (8); the three-way pipe (8) is fixed on the fixing plate B (402); and the two ventilation ends of the three-way pipe (8) are respectively connected to the first gas branch and the second gas branch; The first gas branch comprises a plurality of ventilation pipes and gas nozzles (909), one end of each ventilation pipe is connected to the three-way pipe (8), the end of each ventilation pipe is connected to a corresponding gas nozzle (909), each gas nozzle (909) extends into a corresponding paper feeding air duct, and each ventilation pipe is connected to the fixing plate B (402); One end of the ventilation pipe of the second gas branch is connected to the three-way pipe (8), and the other end is connected to the hand valve (104); the two ventilation ends of the hand valve (104) are respectively connected to the two air pipes of the rotating hinge assembly (6); and the hand valve (104) is fixed on the fixed plate B (402).

6. The paper feeding device according to claim 5, characterized in that: A pressure reducing valve (102) is also provided on the ventilation pipeline of the second gas branch, and the pressure reducing valve (102) is fixed on the fixing plate B (402).

7. The paper feeding device according to claim 5, characterized in that: Each ventilation pipe on the first gas branch is also provided with a speed regulating valve (907), and each speed regulating valve (907) is fixedly connected to the corresponding ventilation pipe and gas nozzle (909).

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