Automatic paper feeding device of printer

Abstract

The utility model provides an automatic paper feeding device of a printer, which is characterized in that a paper releasing roller group is arranged at the rear upper part of a rack and is used for arranging a paper releasing roll; the paper feeding channel is located below the paper placing roller set and used for receiving paper heads released by the paper placing roll and enabling the paper heads to enter the paper feeding channel. The paper feeding roller and the paper pressing roller are oppositely arranged below the paper feeding channel, the paper feeding roller is a driving roller, and an adjustable clamping gap is formed between the paper feeding roller and the paper pressing roller and used for clamping a paper head and providing forward driving force for the paper head; the first guide plate is arranged behind the clamping gap, the rear end of the first guide plate is in butt joint with the platform rear hanging piece, and the first guide plate is provided with an arc transition face used for guiding the paper head to the platform rear hanging piece; the printing platform is arranged at the rear end of the platform rear hanging piece and used for bearing the paper head. The automatic paper feeding device of the printer has the advantage of realizing automatic paper feeding from the paper roll to the printing platform.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to an automatic paper feeding device for a printer. Background Art

[0002] Large-scale printing printers place the roll of paper onto the paper feed roller assembly, which slowly feeds the paper. The roll of paper passes through the roller system in sequence, is printed on the printer platform, and dried (cured) before being reeled up by the paper take-up roller assembly.

[0003] Therefore, the overall structure of a large-scale printing printer is relatively complex, and a roller system design is required to enable the printing medium to pass through various functional components while controlling the travel distance to achieve a sufficient amount in a smaller space.

[0004] Due to these objective factors, the outer shell needs to be manually removed during the first loading of the roll, and the staff will pull the head of the roll through the rollers in the roller group to the paper collection side before entering the normal printing process.

[0005] However, as the integration of equipment increases, the packaging requirements become higher and higher. This method of removing the shell and manually feeding paper can no longer meet current needs.

[0006] Among them, the section from loading the paper roll to the printing platform is the most difficult. In order to solve the paper loading problem in this section, a new paper loading method needs to be designed.

[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content

[0008] The purpose of the utility model is to address the deficiencies of the prior art and thus provide an automatic paper feeding device for a printer which can automatically load paper from a paper roll to a printing platform.

[0009] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a printer automatic paper feeding device, comprising a frame and a paper placing roller group, a paper feeding channel, a paper feeding roller, a paper pressing roller, a first guide plate, a platform rear hanging part and a printing platform, all of which are arranged based on the frame;

[0010] The paper placing roller group is arranged at the upper rear of the frame and is used to place the paper roll;

[0011] The paper feeding channel is located below the paper putting roller group, and the paper feeding channel is vertically arranged to receive the paper head released by the paper putting roll into the paper feeding channel;

[0012] The paper feed roller and the paper pressing roller are arranged opposite to each other below the paper feed channel. The paper feed roller is an active roller. An adjustable clamping gap is formed between the paper feed roller and the paper pressing roller to clamp the paper head and provide a driving force for the paper head to move forward.

[0013] The first guide plate is arranged behind the clamping gap, the rear end of the first guide plate is docked with the rear hanging piece of the platform, and the first guide plate has an arc transition surface for guiding the paper head to the rear hanging piece of the platform;

[0014] The printing platform is arranged at the rear end of the platform rear hanging part and is used to receive the paper.

[0015] Based on the above, the upper part of the paper feeding channel includes a rear sealing plate and a paper baffle plate arranged on the frame, a vertical channel is formed between the rear sealing plate and the paper baffle plate, and a curved portion is provided at the bottom end of the paper baffle plate to form a second guide plate.

[0016] Based on the above, the rear sealing plate is a straight plate, the lower end of the rear sealing plate is higher than the lower end of the paper stopper, a steering roller is installed below the rear sealing plate, the steering roller is higher than the lower end of the paper stopper, and is used to guide the paper head to turn.

[0017] Based on the above, a third guide plate is provided between the steering roller and the paper pressing roller, and the third guide plate cooperates with the second guide plate to guide the paper head to the clamping gap.

[0018] Based on the above, one end or both ends of the first guide plate, the second guide plate and the third guide plate are provided with a folded structure.

[0019] Based on the above, the surface of the paper pressing roller is provided with a plurality of anti-slip grooves extending in the circumferential direction and distributed in the circumferential direction.

[0020] Based on the above, the surface of the steering roller is provided with a plurality of anti-skid grooves extending in the circumferential direction and distributed in the circumferential direction.

[0021] Based on the above, a first induction sensor is provided on the rear hanging component.

[0022] Based on the above, a platform front hanging piece is provided on the paper exit side of the printing platform, and a second induction sensor is provided on the platform front hanging piece.

[0023] Based on the above, the angle between the first guide plate and the rear hanging piece of the platform at the joint is an obtuse angle.

[0024] Based on the above, a paper feed shaft is provided between the platform rear hanging part and the printing platform, and a pressure rod mechanism cooperating with the paper feed shaft is provided on the frame, and the pressure rod mechanism is a manual pressure rod or an electric pressure rod.

[0025] Compared with the prior art, the present invention has substantial features and progress. Specifically, the present invention arranges a paper placing roller group at the top of the frame, and then provides a vertical paper feeding channel. After being driven by the paper feeding roller and the paper pressing roller and guided by the guide plate, the paper is finally delivered to the printing platform. As a whole, the paper is automatically loaded with the help of the gravity of the paper head, the driving force of part of the paper feeding roller, and the driving force of the paper feed shaft in the original printing platform, avoiding the tedious problems of equipment dismantling and manual paper feeding.

[0026] Induction sensors are added in front and behind the printing platform to sense the travel position of the printing medium, so as to determine whether the paper loading action is performed in place and whether there is a paper shortage state. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the automatic paper feeding device of the printer in the utility model.

[0028] Figure 2 It is a three-dimensional diagram of the internal structure of the automatic paper feeding device of the printer in the present utility model.

[0029] In the figure: 1. Frame; 2. Paper feed roller assembly; 3. Paper feed channel; 4. Paper feed roller; 5. Paper pressing roller; 6. First guide plate; 7. Platform rear hanging piece; 8. Printing platform; 9. Steering roller; 10. Paper roll; 11. Third guide plate; 12. Second guide plate; 13. First induction sensor; 14. Second induction sensor; 15. Pressure lever mechanism; 16. Platform front hanging piece; 17. Paper feed shaft; 18. Rear sealing plate; 19. Paper stopper. DETAILED DESCRIPTION

[0030] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0031] like Figure 1 and Figure 2 As shown, a printer automatic paper feeding device includes a frame 1 and a paper placing roller group 2, a paper feeding channel 3, a paper feeding roller 4, a paper pressing roller 5, a steering roller 9, a first guide plate 6, a platform rear hanging part 7 and a printing platform 8, all of which are arranged based on the frame 1.

[0032] The paper placing roller group 2 is arranged at the upper rear of the frame 1 and is used to set the paper roll. There are many forms of the paper placing roller group 2. One is a paper placing roller inserted in the axis of the paper roll, and the other is a supporting roller that supports the paper roll 10 to rotate. Different forms of paper placing roller groups can be determined according to different scenarios.

[0033] The paper feeding channel 3 is located below the paper release roller group 2. The paper feeding channel is vertically arranged to receive the paper head released by the paper roll 10 and enter the paper feeding channel 3. In this embodiment, the paper feeding channel 3 as a whole is composed of a rear sealing plate, a paper stopper, a steering rod and a third guide plate arranged on the frame 1. A curved portion is provided at the bottom end of the paper stopper to form a second guide plate 12.

[0034] Among them, the rear sealing plate is a straight plate, the lower end of the rear sealing plate is higher than the lower end of the paper stopper, and a turning roller 9 is installed below the rear sealing plate. The turning roller 9 is higher than the lower end of the paper stopper and is used to guide the paper head to turn. The purpose is to prevent the paper head from winding together when suspended in the air.

[0035] The paper head vertically entering the paper feeding channel 3 moves under the action of its own weight, turns at the curved portion of the paper stopper, and finally enters the downstream paper feeding roller 4 under the guidance of the second guide plate 12.

[0036] The paper feed roller 4 and the paper pressing roller 5 are positioned opposite each other below the paper feed passage 3. The surface of the paper feed roller is made of metal, plastic, or plastic. The paper feed roller 4 is an active roller. An adjustable clamping gap is formed between the paper feed roller 4 and the paper pressing roller 5 to clamp the paper and provide driving force for its advancement. The paper head needs to turn at this point to move forward and downward.

[0037] The paper pressing roller 5 is designed as a movable roller, which can move away from or close to the paper feeding roller 4, and can be moved by the cylinder and the track.

[0038] The first guide plate 6 is disposed behind the clamping gap, with its rear end docked with the platform rear hanger 7. The first guide plate 6 has an arc transition surface for guiding the paper head onto the platform rear hanger 7. At the position docked with the platform rear hanger 7, the included angle reaches an obtuse angle to ensure that the paper head can move smoothly toward the platform rear hanger 7.

[0039] The platform rear hanger 7 and the printing platform 8 are the original structures of traditional printers. The platform rear hanger 7 is an arc surface, and the printing platform 8 is a horizontal supporting surface. Usually, a paper feed shaft is also provided between the platform rear hanger and the printing platform for smooth transition of the printing medium without local deformation. A pressure rod mechanism 15 cooperating with the paper feed shaft is provided on the frame, and the pressure rod mechanism is a manual pressure rod or an electric pressure rod.

[0040] The printing platform 8 is arranged at the rear end of the platform rear hanging part 7. During the paper loading process, it is used to receive the paper head. During the printing process, it is used as a basic platform for printing the printing medium.

[0041] In order to cooperate with the steering roller 9 or maintain the direction of the paper head, a third guide plate 11 is set between the steering roller 9 and the lower end of the rear side plate. The third guide plate 11 cooperates with the second guide plate 12 to guide the paper head to the clamping gap.

[0042] Since each guide plate is a newly inserted structure with its own structural boundary, a folding structure is provided at one or both ends of the first guide plate, the second guide plate and the third guide plate, that is, they are folded together in reverse at the front or rear end to avoid scratches at the boundary or structures that hinder the advancement of the paper.

[0043] In order to enhance the guiding effect, the surface of the paper pressing roller is provided with a plurality of anti-skid grooves extending in the circumferential direction and distributed in the circumferential direction, and the surface of the steering roller is provided with a plurality of anti-skid grooves extending in the circumferential direction and distributed in the circumferential direction.

[0044] In a preferred embodiment, a first sensing sensor 13 is provided on the platform rear hanger 7, a platform front hanger 16 is provided on the paper outlet side of the printing platform 8, and a second sensing sensor 14 is provided on the platform front hanger 16. The sensing sensor can be an optical sensor, which is mainly used to sense whether the printing medium has reached the current position.

[0045] It should be noted that, in the present invention, paper refers to a flexible printing medium, and other types of flexible roll printing media can also implement this solution.

[0046] Working principle description:

[0047] When the machine is powered on, the pressure lever mechanism is lifted, and the pressure wheel on the pressure lever mechanism is separated from the paper feed shaft, and the paper feed roller 4 and the pressure roller 5 are attached together. The action of the pressure lever mechanism being lifted triggers the induction switch, and the motor of the paper feed shaft 17 and the motor of the paper feed roller 4 are energized at the same time, and the paper feed roller 4 and the paper feed shaft 17 rotate;

[0048] The paper is manually rotated so that the paper head passes through the paper feed channel 3 under the action of gravity and enters the wedge-shaped space formed by the paper pressing roller 5 and the paper feed roller 4. The paper feed roller 4 is driven by a motor and feeds the paper along the first guide plate 6 and the rear hanging piece of the platform to the top of the printing platform;

[0049] The paper continues to move forward with the help of the paper feed shaft 17, and reaches the position of the second induction sensor 14 on the top of the front hanging part 7 of the platform. The sensor is triggered, and the motors of the paper feed shaft 17 and the paper feed roller 4 are simultaneously powered off;

[0050] Then the handle of the pressure lever mechanism is lowered, the paper feed roller 4 and the paper pressing roller 5 are separated, the paper pressing wheel in the pressure lever mechanism is fitted with the paper feed shaft 17, and paper loading is completed.

[0051] The core function of the first sensing sensor 13 is to sense whether the machine is out of paper during printing. If so, the first sensing sensor 13 notifies the staff to perform the paper feeding operation.

[0052] This structure optimizes the paper loading process of the printing equipment, realizes automatic paper loading, simplifies worker operations, and reduces labor input.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A printer automatic paper feeder, characterized by: It includes a frame and a paper placing roller group, a paper feeding channel, a paper feeding roller, a paper pressing roller, a first guide plate, a platform rear hanging part and a printing platform, all of which are arranged based on the frame; The paper placing roller group is arranged at the upper rear of the frame and is used to place the paper roll; The paper feeding channel is located below the paper putting roller group, and the paper feeding channel is vertically arranged to receive the paper head released by the paper putting roll into the paper feeding channel; The paper feed roller and the paper pressing roller are arranged opposite to each other below the paper feed channel. The paper feed roller is an active roller. An adjustable clamping gap is formed between the paper feed roller and the paper pressing roller to clamp the paper head and provide a driving force for the paper head to move forward. The first guide plate is arranged behind the clamping gap, the rear end of the first guide plate is docked with the rear hanging piece of the platform, and the first guide plate has an arc transition surface for guiding the paper head to the rear hanging piece of the platform; The printing platform is arranged at the rear end of the platform rear hanging part and is used to receive the paper.

2. The automatic paper feeder for a printer according to claim 1, characterized in that: The upper part of the paper feeding channel includes a rear sealing plate and a paper baffle plate arranged on the frame, a vertical channel is formed between the rear sealing plate and the paper baffle plate, and a curved portion is provided at the bottom end of the paper baffle plate to form a second guide plate.

3. The automatic paper feeder for a printer according to claim 2, characterized in that: The rear sealing plate is a straight plate, the lower end of which is higher than the lower end of the paper stopper. A steering roller is installed below the rear sealing plate, and the steering roller is higher than the lower end of the paper stopper for guiding the paper head to turn.

4. The automatic paper feeder for a printer according to claim 3, characterized in that: A third guide plate is provided between the steering roller and the paper pressing roller, and the third guide plate cooperates with the second guide plate to guide the paper head to the clamping gap.

5. The automatic paper feeder for a printer according to claim 4, characterized in that: One end or both ends of the first guide plate, the second guide plate and the third guide plate are provided with a folded structure.

6. The automatic paper feeder for a printer according to claim 5, characterized in that: The surface of the paper pressing roller is provided with a plurality of anti-skid grooves extending in the circumferential direction and distributed in the circumferential direction; the surface of the steering roller is provided with a plurality of anti-skid grooves extending in the circumferential direction and distributed in the circumferential direction.

7. The automatic paper feeder for a printer according to any one of claims 1 to 5, characterized in that: A first induction sensor is arranged on the rear hanging piece of the platform.

8. The automatic paper feeder for a printer according to claim 7, characterized in that: A front hanging piece of the platform is provided on the paper exit side of the printing platform, and a second induction sensor is provided on the front hanging piece of the platform.

9. The automatic paper feeder for a printer according to claim 5, characterized in that: The included angle between the first guide plate and the platform rear hanging piece at the joint is an obtuse angle.

10. The automatic paper feeder for a printer according to claim 5, characterized in that: A paper feed shaft is arranged between the platform rear hanging part and the printing platform, and a pressure rod mechanism cooperating with the paper feed shaft is arranged on the frame. The pressure rod mechanism is a manual pressure rod or an electric pressure rod.

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