JP2007276950A - Target transferring roller and printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a target transferring roller and a printing device capable of preventing a kink regardless of a state of a target such as a recording paper sheet. <P>SOLUTION: The target transferring roller for transferring the target K as a printing target to printing regions 12 and 13 has a pulling guide part for pulling the target to an end direction on surfaces of target transferring rollers 15 and 16a. Preferably, the transferring roller is divided into a plurality of partial transferring rollers, and the plurality of the partial transferring rollers have the pulling guide parts for pulling the target to different directions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a target conveying roller and a printing apparatus for conveying a target to a printing position or the like.

2. Description of the Related Art Conventionally, a laser printer or the like has a configuration in which recording paper or the like for printing or the like is stored, and when recording or the like, the recording paper or the like is conveyed to a printing position by a paper feeding / conveying roller (for example, Patent Document 1).
JP-A-10-181896 (FIG. 1 etc.)

However, in recent years, recording paper is rarely discarded by one printing, and it is common to perform double-sided printing by reusing the recording paper printed once.
In this case, the state of the recording paper is deteriorated from that of the new paper, and when the recording paper is transported by a transport roller or the like, there is a problem that the recording paper is scrambled and printing cannot be performed normally. .

SUMMARY An advantage of some aspects of the invention is that it provides a target transport roller and a printing apparatus that do not cause paper jamming regardless of the state of a target such as a recording paper.

  According to the present invention, there is provided a target transport roller for transporting a target to be printed toward a printing area, and a pull guide for pulling the target toward the end on the surface of the target transport roller. This is achieved by a target conveying roller characterized in that the portion is formed.

  According to the above configuration, since the pulling guide portion for pulling the target in the end direction is formed on the surface of the target transport roller, it is possible to effectively prevent, for example, the center portion of the target from being twisted. Can be printed normally.

  Preferably, the conveyance roller is held by a rotation shaft, and the conveyance roller is divided into a plurality of partial conveyance rollers, and the plurality of partial conveyance rollers respectively pull the target in different directions. It is a target conveyance roller characterized by having a guide part.

  According to the said structure, the conveyance roller is divided | segmented into the some partial conveyance roller, and has the tension | pulling guide part for each of the some partial conveyance roller to pull a target in a different direction. For this reason, it can prevent more reliably that a target, for example, center part generate | occur | produces.

  Preferably, the target transport roller is made of resin and / or rubber.

According to the said structure, since the said target consists of resin and / or rubber | gum, moderate friction with a target arises, and while being able to convey a target reliably, a target can also be pulled reliably.
For this reason, it is possible to prevent the occurrence of kinking at the center of the target.

  Preferably, according to the above configuration, the pull guide portion is a screw-shaped or a helical shape.

  Preferably, a friction surface that promotes generation of friction with the target is provided in a contact portion that contacts the target among the screw-shaped or helical-shaped pull guide portions. It is a target conveyance roller.

  According to the above configuration, the friction surface that promotes the generation of friction with the target is provided in the contact portion that contacts the target among the screw-shaped or helical-shaped pull guide portions. The conveying force is further improved, and a desired pulling force can be applied to the target with high accuracy.

  Preferably, the pulling guide part has a groove part for pulling the target in the end part direction.

  According to the said structure, since the tension | pulling guide part has the groove part which pulls a target in an edge part direction, a target can be reliably pulled in an edge part direction with a simple structure. For this reason, it is possible to prevent the occurrence of warping in the center of the target.

  According to the present invention, the object includes a target storage unit that stores a target to be printed, a printing unit that prints the target, and a target transport roller that transports the target toward the printing unit. This is achieved by a printing apparatus, wherein a pulling guide for pulling the target in an end direction is formed on the surface of the target transport roller.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is a schematic explanatory view showing a main part of a laser printer 10 which is a printing apparatus according to the first embodiment of the liquid ejecting apparatus of the invention.
As shown in FIG. 1, a recording paper storage unit 11 for storing a recording paper K to be printed is provided. That is, the recording paper K is an example of a target, and the recording paper storage unit 11 is an example of a target storage unit.

As shown in FIG. 1, the laser printer 10 has a transfer section 12 for actually printing and a fixing section 13 for stabilizing the printed state, and printing is performed on the recording paper K through these steps. It is the composition to do.
Therefore, the transfer unit 12 and the fixing unit 13 are examples of a printing unit.

As shown in FIG. 1, the laser printer 10 has a mechanism for transporting the recording paper K in the recording paper storage unit 11 to the transfer unit 12 side.
Specifically, as shown in FIG. 1, a pickup roller 15 and a paper feed roller 16 are provided. That is, the recording paper K in the recording paper storage unit 11 is first picked up by the pickup roller 15 and then conveyed to the transfer unit 12 side by the paper supply roller 16.
Therefore, the pickup roller 15 and the paper feed roller 16 are examples of target transport rollers.

FIG. 2 is a schematic explanatory diagram showing the relationship among the pickup roller 15, the paper feed roller 16, the recording paper K, etc. in FIG.
As shown in FIG. 1, the pickup roller 15 has a cylindrical shape and can be rotated by a pickup roller shaft 15a.
At least the surface of the pickup roller 15 is formed of resin and / or rubber.
In the present embodiment, the paper feed roller 16a and the like are composed of, for example, five paper feed rollers 16a and the like. Similarly to the pickup roller 15, the paper feed roller 16a and the like have a cylindrical shape, and at least the surface thereof is formed of resin and / or rubber. Further, it is rotatably supported by the paper feed roller shaft 16f.

FIG. 3 is a schematic enlarged view in which an arrow A part in FIG. 2 is enlarged. As shown in FIG. 3, the surfaces of the paper feed roller 16a and the pickup roller 15 have a screw shape, for example. This screw shape is a shape for guiding the recording paper K in either direction.
This will be specifically described below. First, the pickup roller 15 of FIG. 2 has a screw shape that guides the picked-up recording sheet K in the left-right direction in the drawing.
Accordingly, even if the recording paper K is twisted at the arrow B portion in FIG. 2, the recording paper K is pulled in the left-right direction in the figure, so that the paper twisting at the center can be conveyed as it is. In other words, the paper is conveyed to the paper feed roller 16 in a state in which paper jam has been eliminated.

The paper feed rollers 16a and 16b function to pull the recording paper K conveyed from the pickup roller 15 to the left in the figure, and the paper supply rollers 16d and 16e function to pull the recording paper K to the right in the figure.
The central paper feed roller 16 c guides the recording paper K to the left and right, like the pickup roller 15.
As described above, since the screw shapes of the surfaces of the pickup roller 15 and the paper feed roller 16a are different, the recording paper K is pulled in the left-right direction in the drawing, and the paper twist caused by the arrow B portion is eliminated and the recording paper K is being conveyed. In addition, it is possible to prevent the occurrence of paper jamming at the center of the recording paper K.

Therefore, the screw shape formed on the surfaces of the pickup roller 15 and the paper feed roller 16a is an example of the pull guide portion.
The pickup roller shaft 15a and the paper feed roller shaft 16f are examples of rotating shafts, and the paper feed roller 16a and the like divided into five are examples of partial transport rollers.

As described above, in the present embodiment, the recording paper K is formed on the surface of the pickup roller 15 and the paper feed roller 16a by disposing a resin or the like that easily generates a frictional force and forming a screw shape. It has a structure that is pulled in the left-right direction so that it does not sway from the center.
Therefore, even if printing is performed by the laser printer 10 of FIG. 1, printing or the like can be normally performed without causing printing failure.
In particular, even in the case of printing on the back side of the recording paper K that has been used once, in the present embodiment, paper jam does not occur in the central portion and the like, and it is possible to prevent printing defects from occurring.
In the present embodiment, since a screw shape is formed on the surface of the paper feed roller 16a and the like, the conveying force can be improved by reducing the pitch of the screw.
In this embodiment, the screw shape is used. However, the present invention is not limited to this, and a “hasp” shape may be used.

(Second Embodiment)
FIG. 4 is a schematic explanatory diagram showing the main configuration of the second embodiment. Since many configurations of the present embodiment are the same as those of the first embodiment, the same configurations are denoted by common reference numerals and the like, description thereof will be omitted, and hereinafter, differences will be mainly described.
In the present embodiment, as shown in FIG. 4, the abutting portion 26aa that abuts against the recording sheet K of the sheet feeding roller 26a is formed into a planar surface, which is a friction surface that generates friction. The cross-sectional shape of the surface of the paper feed roller 26a and the like is substantially trapezoidal with the contact portion 26aa as the upper surface.
Accordingly, since the frictional force between the recording paper K and the paper feed roller 26a (including the pickup roller) is generated more strongly than the paper feed roller 16a of the first embodiment, the conveyance force of the recording paper K is improved. Since the pulling force is also improved, it is possible to more reliably prevent the occurrence of paper wobbling.

(Third embodiment)
FIG. 5A is a schematic explanatory diagram showing the main configuration of the third embodiment, and FIG. 5B is a schematic end view taken along the line CC ′ of FIG. Since many configurations of the present embodiment are the same as those of the first embodiment, the same configurations are denoted by common reference numerals and the like, description thereof will be omitted, and hereinafter, differences will be mainly described.
In the present embodiment, unlike the other embodiments described above, a screw shape or a trapezoidal shape is not formed and a groove 36aa is formed so as to protrude from the surface of the paper feed roller 36a or the like.
As shown in FIG. 5B, the groove 36aa is formed at an angle, so that when the paper feed roller 36a etc. transports the recording paper K, when the recording paper K is pressed, the surface of the paper feed roller 36a Falls in the direction of arrow X in the figure.
Then, the recording paper K that has been in contact with the surface is also guided in the X direction. By setting this X direction to the left-right direction of the recording paper K in FIG. 2, the recording paper K is pulled in the same manner as in the first embodiment, and the occurrence of warping can be prevented.
As described above, according to the present embodiment, it is possible to prevent the printing paper K from being twisted and to prevent defective printing without forming a complicated shape such as a screw shape on the paper feed roller or the like.

  The present invention is not limited to the above-described embodiment. Further, the present invention is not limited to a laser printer, but a recording head used in an image recording apparatus such as a printer, a color material ejection head used for manufacturing a color filter such as a liquid crystal display, an organic EL display, and an FED (surface emitting display). Electrode material ejecting head used for electrode formation, bio-organic matter ejecting head used for biochip manufacturing, etc., printing device such as liquid ejecting device using liquid ejecting head for discharging liquid, sample ejecting device as precision pipette, etc. It can also be applied to.

1 is a schematic explanatory diagram illustrating a main part of a laser printer that is a printing apparatus according to a first embodiment of a liquid ejecting apparatus of the invention. FIG. 2 is a schematic explanatory diagram illustrating a relationship among a pickup roller, a sheet feeding roller, a recording sheet, and the like in FIG. 1. It is the schematic enlarged view to which the arrow A part of FIG. 2 was expanded. It is a schematic explanatory drawing which shows the main structures of 2nd Embodiment. (A) is a schematic explanatory drawing which shows the main structures of 3rd Embodiment, (b) is a schematic end elevation of the C-C 'line | wire of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Laser printer, 11 ... Recording paper accommodating part, 12 ... Transfer part, 12a ... Transfer belt, 13 ... Fixing part, 14 ... Ink cartridge, 15 ... Pick-up roller , 15a ... pickup roller shaft, 16a ... paper feed roller, 16f ... paper feed roller shaft, K ... recording paper

Claims (7)

A target transport roller for transporting a target to be printed toward a print area,
A target transport roller, wherein a pull guide for pulling the target in an end direction is formed on a surface of the target transport roller. The transport roller is held by a rotating shaft,
The transport roller is divided into a plurality of partial transport rollers,
The target transport roller according to claim 1, wherein the plurality of partial transport rollers have the pull guide portions for pulling the target in different directions.   The target transport roller according to claim 1, wherein the target transport roller is made of resin and / or rubber.   4. The target transport roller according to claim 1, wherein the pulling guide portion has a screw shape or a helical shape. 5.   A friction surface that promotes the generation of friction with the target is provided at an abutting portion that abuts on the target among the screw-shaped or helical-shaped pulling guide portions. The target conveyance roller in any one of Claims 1 thru | or 4.   The target conveying roller according to any one of claims 1 to 3, wherein the pulling guide part has a groove part that pulls the target in an end part direction. A target container for storing a target to be printed;
A printing unit for printing the target;
A target conveying roller for conveying the target toward the printing unit,
A printing apparatus, wherein a pulling guide for pulling the target in an end direction is formed on a surface of the target conveying roller.

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