Anti-winding paper jam paper feed roller of express delivery slip printer

Abstract

The utility model discloses a prevent paper winding paper jam paper feed roller of express surface single printer relates to printing equipment paper feed mechanism technical field, the utility model discloses a paper roller, the paper roller top one side is provided with auxiliary mechanism, the auxiliary mechanism bottom is provided with paper feed mechanism, the auxiliary mechanism includes the auxiliary roller of setting in the paper roller top. The utility model discloses through the first spring in auxiliary mechanism and auxiliary roller synergistic effect, realizes the dynamic regulation of paper pressure. Auxiliary roller is hinged with printer cover plate through mounting plate, and the inside limiting telescopic link is cooperated to ensure the vertical telescopic stability, makes the paper of different thicknesses can obtain even pressure. Auxiliary roller and paper feed roller keep the same horizontal line design, effectively eliminate the curl or deviation before paper enters, avoid the paper jam or the problem of skidding caused by uneven pressure. The design significantly improves the adaptability to paper thickness, ensures the stability of the conveying process, especially suitable for high-frequency continuous printing scene.

Description

Technical Field

[0001] This utility model belongs to the technical field of paper feeding mechanism of printing equipment, and in particular relates to the anti-paper jamming paper feeding roller of express waybill printer. Background Technology

[0002] Express waybill printers are core equipment in the logistics and e-commerce industries, used to efficiently print express waybills containing sender and recipient information, barcodes, and logistics tracking codes. Their core function is to quickly and accurately complete waybill output, ensuring traceability of logistics information and operational efficiency.

[0003] However, in practical applications, due to the characteristics of express waybill paper and the high-frequency continuous printing conditions, traditional paper feed roller systems often face the following technical challenges: fixed pressure roller systems cannot adapt to different paper thicknesses, uneven friction causes slippage or jamming, resulting in printing failure; the surface friction of the paper feed roller is uniform and cannot be dynamically adjusted according to the paper condition, which easily leads to slippage during paper feeding. To address these issues, we have provided an anti-paper-roll jamming paper feed roller for express waybill printers. Utility Model Content

[0004] The purpose of this invention is to provide a paper feed roller that prevents paper roll jamming in express waybill printers. Through the cooperation of auxiliary mechanisms and paper feeding mechanisms, it solves the problem in the prior art where the paper feed roller and fixed pressure roller system cannot adapt to different paper thicknesses, and uneven friction causes slippage or jamming, resulting in the inability to print normally.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to an anti-paper jamming paper feed roller for express waybill printers, including an upper paper roller, an auxiliary mechanism on one side of the top of the upper paper roller, and a paper feeding mechanism at the bottom of the auxiliary mechanism. The auxiliary mechanism includes an auxiliary roller on top of the upper paper roller, a mounting plate movably connected to the top of the auxiliary roller via bearings, a first spring on top of the mounting plate, and a mounting rod fixedly connected to the top of the mounting plate. The paper feeding mechanism includes a paper feed roller at the bottom of the auxiliary roller, an elastic plate inside the paper feed roller, a telescopic airbag fixedly connected inside the paper feed roller, a push plate contacting the surface of the telescopic airbag, and a push rod fixedly connected to the top of the push plate.

[0007] The present invention is further configured such that a rotating shaft block is fixedly connected to the top of the mounting plate, the first spring, and the mounting rod, and the rotating shaft block is fixedly connected to the bottom of the external printer cover plate.

[0008] The present invention is further configured such that a limit telescopic rod is fixedly connected inside the first spring, and the auxiliary roller and the paper feeding roller are designed to be on the same horizontal line.

[0009] The present invention is further configured such that the surface of the paper feeding roller is provided with inlet and outlet grooves adapted to the elastic plate, and the number of inlet and outlet grooves and the number of elastic plates are both eight, and the eight elastic plates are evenly arranged in a circle inside the paper feeding roller.

[0010] The present invention is further configured such that a support plate is fixedly connected to both sides inside the paper feeding roller, and a push through hole adapted to the push rod is opened inside the support plate. The side of the push rod away from the push plate is fixedly connected to the elastic plate.

[0011] The present invention is further configured such that both ends of the paper feeding roller are fixedly connected to a rotating shaft, the right rotating shaft is movably connected to a rotary joint through a bearing, the outer shell of the rotary joint is fixed inside the printer housing, the stationary end of the rotary joint is connected to an air pipe, and the air pipe is connected to the telescopic airbag.

[0012] The present invention is further configured such that the surfaces of the elastic plate and the push plate are both arc-shaped, and a second spring is sleeved on the surface of the push rod.

[0013] The present invention has the following beneficial effects.

[0014] 1. This invention achieves dynamic adjustment of paper pressure through the coordinated action of a first spring and an auxiliary roller in the auxiliary mechanism. The auxiliary roller is hinged to the printer cover via a mounting plate, and its internal limiting telescopic rod ensures vertical extension and contraction stability, allowing paper of different thicknesses to receive uniform pressure. The auxiliary roller and the paper feed roller are designed to be on the same horizontal line, effectively eliminating paper curling or deviation before entry, and avoiding paper jams or slippage caused by uneven pressure. This design significantly improves adaptability to paper thickness and ensures smooth transport, making it particularly suitable for high-frequency continuous printing scenarios.

[0015] 2. This invention utilizes a telescopic airbag to drive the extension and retraction of an elastic plate, achieving active adjustment of friction. When the airbag inflates, the push plate, via a push rod, causes the elastic plate to extend beyond the paper feed roller, increasing the contact area and enhancing friction. When the pressure is released, a second spring causes the elastic plate to return to its original position, preventing residual friction interference. The elastic plate features a rounded surface design, and with the dynamic control of the air source through the rotary joint and air pipe, the air pressure can be continuously adjusted during the rotation of the paper feed roller, balancing anti-slip and paper protection. This structure effectively solves the slippage problem caused by traditional fixed friction, while reducing the risk of damage to the paper surface and ensuring the integrity and clarity of the printed labels.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 A 3D diagram of the paper feed rollers used to prevent paper jamming in a courier waybill printer.

[0019] Figure 2 An exploded view of the first spring and the limiting telescopic rod in the paper feed roller of the express waybill printer to prevent paper roll jamming.

[0020] Figure 3 This is a cross-sectional view of the paper feed roller in the anti-paper jamming paper feed roller of a courier waybill printer.

[0021] Figure 4 A 3D view of the paper feeding mechanism in the paper feed roller of an express waybill printer to prevent paper roll jamming.

[0022] Figure 5 An exploded view of the push rod and the second spring in the paper feed roller of an express waybill printer to prevent paper roll jamming.

[0023] In the attached diagram: 1. Paper feed roller; 2. Auxiliary mechanism; 201. Auxiliary roller; 202. Mounting plate; 203. First spring; 204. Mounting rod; 3. Paper feeding mechanism; 301. Paper feed roller; 302. Elastic plate; 303. Telescopic airbag; 304. Push plate; 305. Push rod; 4. Rotary shaft block; 5. Limiting telescopic rod; 6. Support plate; 7. Rotary joint; 8. Air pipe; 9. Second spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please see Figures 1-5This utility model relates to an anti-paper jamming mechanism for the paper feed roller of an express waybill printer. It includes an upper paper roller 1, an auxiliary mechanism 2 on one side of the top of the upper paper roller 1, and a paper feeding mechanism 3 at the bottom of the auxiliary mechanism 2. The auxiliary mechanism 2 includes an auxiliary roller 201 on the top of the upper paper roller 1, a mounting plate 202 movably connected to the top of the auxiliary roller 201 via bearings, a first spring 203 on the top of the mounting plate 202, and a mounting rod 204 fixedly connected to the top of the mounting plate 202. The paper feeding mechanism 3 includes a paper feed roller 301 at the bottom of the auxiliary roller 201, an elastic plate 302 inside the paper feed roller 301, a telescopic airbag 303 fixedly connected inside the paper feed roller 301, a push plate 304 in contact with the surface of the telescopic airbag 303, and a push rod 305 fixedly connected to the top of the push plate 304.

[0027] Specifically: Through the setting of auxiliary mechanism 2, the auxiliary roller 201 cooperates with the first spring 203 to provide elastic clamping force on the paper, adapting to different paper thicknesses and avoiding paper jams or slippage caused by uneven pressure. The mounting plate 202 is hinged to the printer cover through the rotating shaft block 4 to achieve free opening and closing. The limiting telescopic rod 5 ensures the vertical extension and contraction stability of the first spring 203. The auxiliary roller 201 and the paper feeding roller 301 are designed to be on the same horizontal line to ensure the flatness of the paper before entering the paper feeding mechanism 3 and reduce the risk of curling or deviation. Through the setting of the paper feeding mechanism 3, the paper feeding roller 301 is equipped with a telescopic airbag 303 and an elastic plate 302. When the telescopic airbag 303 inflates, the push plate 304 and push rod 305 extend the elastic plate 302 from the inlet / outlet slot, increasing the contact area and friction with the paper and preventing slippage. The telescopic airbag 303 is connected to an external air source through the rotary joint 7 and air pipe 8, allowing for continuous adjustment of air pressure while the paper feed roller 301 rotates, achieving dynamic friction control. The surface of the elastic plate 302 is designed with an arc shape to reduce damage to the paper. The second spring 9 contracts when the airbag deflates, pulling the elastic plate 302 back into the paper feed roller 301 to prevent residual friction from interfering with subsequent paper feeding. The support plate 6 provides support when the elastic plate 302 is not extended, ensuring the overall stability of the paper feed roller 301 structure. The auxiliary mechanism 2 maintains paper flatness through adaptive pressure, and the paper feeding mechanism 3 ensures stable delivery through dynamic friction adjustment. Together, they solve the problems of paper jamming and slippage caused by fixed pressure or single friction force in traditional paper feed rollers 301.

[0028] Example 2

[0029] Please see Figures 1-5Based on Embodiment 1, a rotating shaft block 4 is fixedly connected to the top of the mounting plate 202, the first spring 203, and the mounting rod 204. The rotating shaft block 4 is fixedly connected to the bottom of the external printer cover. A limit telescopic rod 5 is fixedly connected inside the first spring 203. The auxiliary roller 201 and the paper feed roller 301 are designed to be on the same horizontal line. The surface of the paper feed roller 301 is provided with inlet and outlet slots that are adapted to the elastic plates 302. There are eight inlet and outlet slots and eight elastic plates 302. The eight elastic plates 302 are evenly arranged in a circle inside the paper feed roller 301. The inner sides of the paper feed roller 301 are... Each is fixedly connected to a support plate 6. The support plate 6 has a push through hole that matches the push rod 305. The side of the push rod 305 away from the push plate 304 is fixedly connected to the elastic plate 302. Both ends of the paper feed roller 301 are fixedly connected to a rotating shaft. The right rotating shaft is movably connected to a rotary joint 7 through a bearing. The outer shell of the rotary joint 7 is fixed inside the printer housing. The stationary end of the rotary joint 7 is connected to an air pipe 8. The air pipe 8 is connected to the telescopic airbag 303. The surfaces of the elastic plate 302 and the push plate 304 are both arc-shaped. A second spring 9 is sleeved on the surface of the push rod 305.

[0030] Specifically: The pivot block 4 allows the mounting plate 202 to pivot around its axis. The pivot block 4 has a coaxial pivot hole and pin inside, and the mounting plate 202 forms a rotating pair with the printer cover via the pin. This hinge structure balances smooth opening and closing with stable positioning, facilitating quick disassembly, maintenance, or replacement of internal components. The limiting telescopic rod 5 limits the first spring 203, ensuring it remains vertically extended. The inlet / outlet slot allows the elastic plate 302 to move out of the paper feed roller 301. The support plate 6 supports the elastic plate 302 before it extends. The rotary joint 7 and air pipe 8 inflate the air bladder when the paper feed roller 301 rotates. The second spring 9 retracts the elastic plate 302 into the paper feed roller 301 after the air bladder deflates.

[0031] The working principle of this utility model is as follows: The printing paper is placed on the upper paper roller 1, which is then positioned in the printer's paper feeding position. The paper is stretched and placed on the feed roller 301. After the printer cover is closed, the mounting plate 202 is hinged and pressed down via the pivot block 4. The first spring 203 generates a vertically downward elastic pressure under the constraint of the limiting telescopic rod 5. The auxiliary roller 201 automatically adjusts its pressing stroke according to the paper thickness, ensuring uniform linear pressure for sheet paper of different thicknesses. The auxiliary roller 201 is designed to be parallel to the axis of the feed roller 301, eliminating serpentine paper deviation.

[0032] When the printer starts, an external air source delivers compressed air to the air pipe 8 through the rotary joint 7. The compressed air enters the paper feed roller 301 through the dynamic sealing channel of the rotary joint 7, causing the telescopic air bladder 303 to inflate. The inflated telescopic air bladder 303 pushes the push plate 304 outward, and the push rod 305, guided by the support plate 6, undergoes linear displacement, pushing the eight circumferentially distributed elastic plates 302 out of the inlet and outlet slots by 2-3 mm. At this time, the arcuate surface of the elastic plate 302 protrudes from the outer surface of the paper feed roller 301, forming a multi-point contact friction enhancement zone.

[0033] During the feeding process, as the paper feed roller 301 rotates, the protruding part of the elastic plate 302 dynamically engages with the paper. When an increase in feeding resistance is detected, the control system increases the pressure of the telescopic airbag 303 via a proportional valve, causing the elastic plate 302 to extend further by 0.1-0.3 mm. Conversely, when the paper is thin or has high humidity, the air pressure is reduced, causing the elastic plate 302 to partially retract, preventing excessive indentation on the paper surface. Throughout this process, the second spring 9 provides a constant preload to ensure that the elastic plate 302 can fully return to its original position after the air pressure is removed.

[0034] When paper feeding is complete, the control system quickly vents air, the telescopic airbag 303 retracts, and the elastic plate 302 fully retracts into the paper feed roller 301 to avoid interference with subsequent paper. The entire process is controlled in a closed loop using pressure sensors and encoders.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A paper feed roller for preventing paper roll jamming in an express waybill printer, including an upper paper roller (1), characterized in that: An auxiliary mechanism (2) is provided on one side of the top of the upper paper roller (1), and a paper feeding mechanism (3) is provided at the bottom of the auxiliary mechanism (2); The auxiliary mechanism (2) includes an auxiliary roller (201) disposed on the top of the upper paper roller (1), a mounting plate (202) movably connected to the top of the auxiliary roller (201) via a bearing, a first spring (203) disposed on the top of the mounting plate (202), and a mounting rod (204) fixedly connected to the top of the mounting plate (202). The paper feeding mechanism (3) includes a paper feeding roller (301) disposed at the bottom of the auxiliary roller (201), an elastic plate (302) disposed inside the paper feeding roller (301), a telescopic airbag (303) fixedly connected inside the paper feeding roller (301), a push plate (304) contacting the surface of the telescopic airbag (303), and a push rod (305) fixedly connected to the top of the push plate (304).

2. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: The mounting plate (202), the first spring (203) and the top of the mounting rod (204) are all fixedly connected to a rotating shaft block (4), and the rotating shaft block (4) is fixedly connected to the bottom of the external printer cover.

3. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: The first spring (203) is internally fixedly connected to a limit telescopic rod (5), and the auxiliary roller (201) and the paper feeding roller (301) are designed to be on the same horizontal line.

4. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: The paper feed roller (301) has inlet and outlet slots that are adapted to the elastic plate (302) on its surface. There are eight inlet and outlet slots and eight elastic plates (302) in total. The eight elastic plates (302) are evenly arranged in a circle inside the paper feed roller (301).

5. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: The paper feeding roller (301) has a support plate (6) fixedly connected to both sides inside. The support plate (6) has a push through hole that matches the push rod (305). The push rod (305) is fixedly connected to the elastic plate (302) on the side away from the push plate (304).

6. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: Both ends of the paper feed roller (301) are fixedly connected to a rotating shaft. The right rotating shaft is movably connected to a rotary joint (7) through a bearing. The outer shell of the rotary joint (7) is fixed inside the printer housing. The stationary end of the rotary joint (7) is connected to an air pipe (8), which is connected to the telescopic airbag (303).

7. The anti-paper-roll jamming paper feed roller of the express waybill printer according to claim 1, characterized in that: The surfaces of the elastic plate (302) and the push plate (304) are both arc-shaped, and the surface of the push rod (305) is fitted with a second spring (9).

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