CN219906259U - High-precision paper positioning mechanism for printing machine - Google Patents

Abstract

The utility model discloses a high-precision paper positioning mechanism for a printer, which comprises a U-shaped seat, wherein a paper feeding roller is arranged at the left end in the U-shaped seat, a plurality of supporting rollers are arranged in the middle of the paper feeding roller, a flattening mechanism is arranged above the paper feeding roller, two limiting plates are sleeved on the outer walls of the supporting rollers in a movable mode, a gear is arranged at the inner bottom of the U-shaped seat, a worm wheel is fixedly connected to the upper side wall of the gear, a worm penetrating through the front wall of the U-shaped seat is meshed with the outer side of the worm wheel, and a knob is fixedly connected to one end of the worm positioned in front of the U-shaped seat. According to the utility model, the two limiting plates move in opposite directions until the width of the limiting plates is equal to that of the paper, so that the effect of limiting and positioning the paper can be achieved, and the paper is offset, so that the phenomenon of paper jam of the printer occurs, and the printing quality of the printer is improved.

Description

High-precision paper positioning mechanism for printing machine

Technical Field

The utility model relates to the technical field of paper positioning, in particular to a high-precision paper positioning mechanism for a printing machine.

Background

A printer is a machine that prints text and images. Modern printers typically consist of mechanisms for loading, inking, stamping, paper feeding, and the like. Paper feeding devices are often used to provide the paper that the printer needs to use when the printer is in use.

Through searching, the paper feeding structure of the printer with the Chinese patent publication No. CN205471901U comprises a paper roll frame and a supporting paper roll, and paper feeding operation can be carried out through the cooperation of the paper roll frame and the supporting paper roll.

When the paper feeding mechanism of the printer is used, the printer realizes the supply of paper through the rotation of the paper roller when printing the paper, but the paper is fed only by a single paper roller, the paper is often offset in the process of moving into the printer, the phenomenon of paper jam of the printer can occur, the printing quality can be influenced, and therefore, the high-precision paper positioning mechanism for the printer is needed to solve the problems.

Disclosure of Invention

The utility model aims to solve the problems in the background technology and provides a high-precision paper positioning mechanism for a printer.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a high-accuracy paper positioning mechanism for printing machine, includes U type seat, paper feed roller and mid-mounting have a plurality of backing rolls are installed to the left end in the U type seat, the top of paper feed roller is equipped with flattening mechanism, and is a plurality of the outer wall co-moving cover of backing roll is equipped with two limiting plates, the gear is installed to the interior bottom of U type seat, the last lateral wall fixedly connected with worm wheel of gear, the outside meshing of worm wheel has the worm that runs through U type seat front wall, the one end fixedly connected with knob that the worm is located before the U type seat, the outside of gear meshes respectively have two pinion racks with two limiting plate lower lateral wall fixed connection, every the tip of pinion rack all activity runs through and is equipped with the longitudinal guide board of fixed connection in the U type seat.

Preferably, the flattening mechanism comprises a fixed plate fixedly connected in the U-shaped seat, a gate-shaped rod is inserted into the upper side wall of the fixed plate in a sliding manner, the lower end of the gate-shaped rod is fixedly connected with a gate-shaped frame, a flattening roller propped against the surface of the paper feeding roller is arranged in the gate-shaped frame, and a spring is jointly connected between the gate-shaped frame and the fixed plate.

Preferably, two guide rollers are mounted at the right end in the U-shaped seat.

Preferably, the outer wall of the paper feeding roller is symmetrically and fixedly sleeved with two limiting rings.

Preferably, two limiting rollers are movably embedded in the side walls of one side, opposite to the limiting plates, of the limiting plates.

Compared with the prior art, the high-precision paper positioning mechanism for the printing machine has the advantages that:

the worm is driven to rotate through the rotating knob, then the worm wheel meshed with the worm is used for driving the gear to rotate, so that toothed plates meshed with two sides of the worm wheel are moved in opposite directions until the spacing between the two limiting plates is equal to the width of paper, the effect of limiting and positioning the paper can be achieved, the paper is offset, the phenomenon of paper jam of the printer is caused, and the printing quality of the printer is improved.

Drawings

FIG. 1 is a top view of a high precision paper positioning mechanism for a printing press according to the present utility model;

FIG. 2 is a schematic diagram of a high-precision paper positioning mechanism for a printing press according to the present utility model;

FIG. 3 is a cross-sectional view of a high precision paper positioning mechanism for a printing press according to the present utility model;

fig. 4 is a schematic structural diagram of the direction a in fig. 2.

In the figure: 1U type seat, 2 paper feed roller, 3 backing roll, 4 limiting plate, 5 gear, 6 worm wheel, 7 worm, 8 pinion rack, 9 vertical deflector, 10 guide roll, 11 fixed plate, 12 gate-type pole, 13 gate-type frame, 14 flattening roller, 15 spring, 16 spacing ring, 17 spacing roller.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-4, a high-precision paper positioning mechanism for a printer comprises a U-shaped seat 1, two guide rollers 10 are installed at the right end in the U-shaped seat 1, a paper feeding roller 2 is installed at the left end in the U-shaped seat 1, a plurality of support rollers 3 are installed in the middle of the U-shaped seat, two limiting rings 16 are symmetrically and fixedly sleeved on the outer wall of the paper feeding roller 2, paper can be prevented from being separated from the paper feeding roller 2, when paper feeding operation is needed, the paper needs to be moved to the input end of the printer, and then the paper is wound on the paper feeding roller 4, and the end of the paper is inserted into the input end of the printer.

The paper feeding roller is characterized in that a flattening mechanism is arranged above the paper feeding roller 2 and comprises a fixed plate 11 fixedly connected in a U-shaped seat 1, a gate-shaped rod 12 is inserted into the upper side wall of the fixed plate 11 in a sliding manner, the lower end of the gate-shaped rod 12 is fixedly connected with a gate-shaped frame 13, a flattening roller 14 propped against the surface of the paper feeding roller 2 is arranged in the gate-shaped frame 13, springs 15 are commonly connected between the gate-shaped frame 13 and the fixed plate 11, before paper winding, the gate-shaped rod 12 is lifted up through the gate-shaped frame 13 and compresses the springs 15, then paper winding is performed, after paper winding is finished, the gate-shaped rod 12 is loosened to enable the flattening roller 14 to rapidly move downwards under the action of the springs 15 until the flattening roller is propped against paper, so that paper can be flattened, and paper conveying is not affected, and wrinkles are prevented.

The outer walls of the supporting rollers 3 are sleeved with the two limiting plates 4 in a co-moving mode, paper can be prevented from falling off, two limiting rollers 17 are movably embedded in the side wall of one side, opposite to the two limiting plates 4, of the supporting rollers, and the two sides of the paper can be guided in the paper conveying process, so that friction between the two sides of the paper and the limiting plates 4 is reduced, and the paper conveying is facilitated.

The gear 5 is installed to the interior bottom of U type seat 1, the last lateral wall fixedly connected with worm wheel 6 of gear 5, the outside meshing of worm wheel 6 has worm 7 that runs through U type seat 1 front wall, the one end fixedly connected with knob that worm 7 is located U type seat 1 front, the outside of gear 5 has two pinion racks 8 with lateral wall fixed connection under two limiting plates 4 respectively the meshing, the tip of every pinion rack 8 all activity runs through and is equipped with the longitudinal guide plate 9 of fixed connection in U type seat 1, after the paper is connected with the printing machine input, drive worm 7 through rotating the knob and rotate, then drive gear 5 through worm wheel 6 with it meshing, make the effect of spacing location to the paper can be reached after the interval between two limiting plates 4 equals with the width of paper, with the paper skew, the phenomenon of jam appears in the printing machine, thereby the printing quality of printing machine has been improved.

Further, the above-described fixed connection is to be understood in a broad sense, unless explicitly stated and defined otherwise, as being, for example, welded, glued, or integrally formed, as is well known to those skilled in the art.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. The utility model provides a high-accuracy paper positioning mechanism for printing machine, includes U type seat (1), its characterized in that, paper feed roller (2) and mid-mounting have a plurality of backing rolls (3) are installed to the left end in U type seat (1), the top of paper feed roller (2) is equipped with flattening mechanism, a plurality of the outer wall co-movable cover of backing roll (3) is equipped with two limiting plates (4), gear (5) are installed to the interior bottom of U type seat (1), the last lateral wall fixedly connected with worm wheel (6) of gear (5), the outside meshing of worm wheel (6) has worm (7) that run through U type seat (1) front wall, one end fixedly connected with knob that worm (7) are located before U type seat (1), the outside of gear (5) is meshed respectively with two pinion racks (8) of lateral wall fixed connection under two limiting plates (4), every the tip of pinion rack (8) all activity run through and are equipped with longitudinal guide (9) of fixed connection in U type seat (1).

2. The high-precision paper positioning mechanism for the printer according to claim 1, wherein the flattening mechanism comprises a fixed plate (11) fixedly connected in a U-shaped seat (1), a gate-shaped rod (12) is inserted into the upper side wall of the fixed plate (11) in a sliding manner, the lower end of the gate-shaped rod (12) is fixedly connected with a gate-shaped frame (13), a flattening roller (14) propped against the surface of a paper feeding roller (2) is arranged in the gate-shaped frame (13), and a spring (15) is commonly connected between the gate-shaped frame (13) and the fixed plate (11).

3. The high-precision paper positioning mechanism for the printer according to claim 1, wherein the right end in the U-shaped seat (1) is provided with two guide rollers (10).

4. The high-precision paper positioning mechanism for the printer according to claim 1, wherein two limiting rings (16) are symmetrically sleeved on the outer wall of the paper feeding roller (2).

5. The high-precision paper positioning mechanism for the printer according to claim 1, wherein two limiting rollers (17) are movably embedded in the side walls of one side opposite to the limiting plates (4).