JPH0537795U - Paper guide - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a paper guide attached to a roller that conveys paper to a printing unit or a reading unit of an information processing device, and is capable of suppressing the height of curl (curvature) locally generated at a corner of the paper. Provide a paper guide with excellent stretching performance when the rising angle is large. [Structure] A plurality of guide plates 3a to 3e are provided between the plurality of roller elements 2 and at both ends thereof. The guide plates 3a to 3e have guide surfaces 5a to 5e that form a path for the paper 9 that enters, and inclined surfaces 7a to 7e that extend obliquely so as to guide the paper 9 into the path. The bending lines of the bent portions 8a to 8e formed at the connecting portions of the guide surfaces 5a to 5e of the guide plate and the inclined surfaces 7a to 7e are such that the outer side in the width direction of the paper 9 when viewed from the direction perpendicular to the paper surface of the paper 9. It is inclined to move backward. The curl of the paper is the inclined surface 7a that is inclined outward.
It is stretched to be pushed outward by ~ 7e.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper guide attached to a roller that conveys paper to a processing unit such as a printing unit and a reading unit of an information processing device, and has a local curl (hereinafter referred to as "curl") at a corner. The present invention relates to a paper guide suitable for conveying a paper that the user has.

[0002]

[Prior Art]

 A printer or an image reading device is provided with a roller for transporting a sheet to its processing unit. Paper of various widths is normally fed to this type of device, but the transport rollers are often shorter than the maximum paper width that can be processed, and the edges of the paper are prevented from floating or bending in the processing section. For this reason, a paper guide for expanding the paper is attached to these rollers.

In this type of conventional paper guide, guide plates are arranged in parallel above and below the paper path, and the upper guide plate is bent upward and the lower guide plate is bent downward on the paper entrance side. An inclined surface that spreads toward the paper is formed, and the tip of the paper is pressed into the paper path by this inclined surface.

FIGS. 6 to 8 show a conventional paper guide provided on the downstream side of the printing unit of the printer device. 6 and 7 show only the upper guide plate. The upper guide plates 3a to 3e are arranged between the roller elements 2 of the feed roller 1 mounted on a frame (not shown) and at both ends thereof, and their bases are connected to the connecting plate 4 to be integrally connected. There is. The guide surfaces 5a to 5e of the respective guide plates 3a to 3e are the same surface, and the inclined surfaces 7a to 7e directed obliquely upward are connected to the sheet entrance side thereof. The bending lines of the bent portions 8a to 8e formed at the connecting portions between the guide surfaces 5a to 5e and the inclined surfaces 7a to 7e are all parallel to the shaft 6 of the feed roller.

If the storage condition of the paper 9 is bad, the curl 10 may occur at the tip corner portion, and the curl 10 may occur at the tip corner portion of the paper 9 due to printing processing by the print head 14 or the like. When the sheet 9 is conveyed by the roller 1, the tip 10a of the curl 10 at the tip of the sheet abuts on the inclined surface 7a of the guide plate 3a, and the curl 10 is pressed downward as the sheet enters and the sheet 9 is conveyed. Was being stretched.

[0006]

[Problems to be solved by the device]

 However, in the conventional method of pressing the curl 10 in a direction parallel to the entering direction, when the tip 10a of the curl is higher than the upper ends of the inclined surfaces 7a to 7e, the tip 10a of the curl is the upper end of the inclined surfaces 7a to 7e. Since it abuts against and is folded, it is necessary to raise the inclined surfaces 7a to 7e, and the paper guide becomes large. Further, even if the rising angle of the curl is large, there is a problem that the curl is folded by the inclined surfaces 7a to 7e.

An object of the present invention is to provide a paper guide having a better curl stretching performance when the curl height and rising angle are large.

[0008]

[Means for Solving the Problems]

 The paper guide of the present invention comprises a plurality of guide plates 3a to 3e located between the roller elements 2 and at both ends thereof. The guide plates 3a to 3e have guide surfaces 5a to 5e which form a passage for the paper 9 coming in and inclined surfaces 7a to 7e which extend obliquely so as to guide the paper 9 into the passage.

The bending lines of the bent portions 8a to 8e formed at the connecting portions of the guide surfaces 5a to 5e of the guide plate and the inclined surfaces 7a to 7e are the same as those of the paper 9 when viewed from the direction perpendicular to the paper surface of the paper 9. The outer side in the width direction is inclined so as to recede, and therefore the inclined surfaces 7a to 7e are formed obliquely outward so that the outer side in the paper width direction recedes with respect to the entering direction of the paper 9.

[0010]

When the paper 9 having the curl 10 enters the paper guide of the present invention, the inner side of the curl 10 and the inclined surfaces 7a to 7e of the guide plate contact each other, and the inclined surfaces 7a to 7e form the paper. Since the outer side in the width direction is formed to recede, a component force 12 for spreading the curl 10 outward is generated at the abutting portion thereof, and the curl 10 is thereby extended.

Even when the height of the curl 10 is high, the contact portion moves from the lower side 11 of the curl 10 to the leading end side to extend the curl 10 as the paper 9 enters, so that the curl 10 is high. Also, since the spreading action is effectively exhibited, and the force for stretching the curl 10 acts outward on the inner side of the curl 10, the curl 10 can be stretched even when the rising angle of the curl is large.

[0012]

【Example】

 1 to 3 show a first embodiment of the present invention, which is a paper guide when the left end of a paper is conveyed as a reference side. The paper guide includes three guide plates 3b, 3c and 3d arranged between roller elements 2 of a feed roller 1 mounted on a frame (not shown) and two wide guide plates 3a arranged at both ends. 3e. The five guide plates 3a to 3e are integrated with the connecting plate 4 at the base end.

The four guide plates 3b to 3e excluding the guide plate 3a on the front side of FIG. 1 have inclined surfaces 7b to 7e which are bent obliquely upward toward the sheet entrance side at an angle of about 45 degrees. The bending lines of the bent portions 8b to 8e formed at the bases of the inclined surfaces 7b to 7e are parallel to the axis 6 of the roller element. The guide plate 3a on the front side of FIG. 1 is bent obliquely upward so that its inclined surface 7a is retracted on the left side in the sheet advancing direction.

When the curled paper 9 enters the paper guide of the present invention, as shown in FIG. 2, the bent portion 8a of the guide plate 3a and the lower portion 11 of the curl 10 at the paper front end abut, The outward component force 12 generated at the contact portion extends the curl 10 outward and guides it to the paper path 13 formed by the upper and lower guide surfaces.

FIG. 4 shows a second embodiment of the present invention, and the structure of the guide plate 3a at the lower end of the drawing is the same as that of the first embodiment. In the second embodiment, the four guide plates 3b to 3e, excluding the guide plate 3a at the lower end of the figure, are inclined upward so that the inclined surfaces 7b to 7e of the guide plates 3b to 3e recede on the right side toward the sheet entrance direction. Has been bent to.

The present embodiment is for conveying sheets of various widths with the left edge of the sheet as a reference side, and the curl 10 at the edge of the sheet is extended even if it contacts any guide plate. When the curl 10 is generated at both corners of the leading edge of the paper 9, the curl 10 can be expanded and conveyed. When the curl 10 is on the extension of the tread surface of the roller element 2, the curl 10 is expanded by the roller element.

FIG. 5 shows a third embodiment of the present invention, which is a paper guide when the paper is conveyed with the center as a reference. The guide plate 3c at the center of the figure has its inclined surface 7c bent toward the paper entry side in parallel with the axis 6 of the roller element and extends straight upward in the paper entry direction. The upper two guide plates 3d and 3e in the figure are bent obliquely upward so that the inclined surfaces 7d and 7e thereof are retracted on the right side in the paper entry direction. Further, the lower two guide plates 3a, 3b in the figure are bent obliquely upward so that the inclined surfaces 7a, 7b thereof are retracted on the left side in the paper entry direction.

[0018]

[Effect of the device]

 As described above, in the paper guide of the present invention, since the expansion force acts outwardly on the inner side of the curl generated in the paper to extend the curl as the paper enters, the curl of the curl Even if the height and the rising angle of the curl are large, the curl can be extended and guided to the paper path.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a paper guide of the present invention.

FIG. 2 is an enlarged plan view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a plan view of the second embodiment.

FIG. 5 is a plan view of the third embodiment.

FIG. 6 is a perspective view of a main part of a conventional paper guide.

7 is an enlarged plan view of FIG.

FIG. 8 is a side view of FIG.

[Explanation of symbols]

 3a to 3e Guide plate 5a to 5e Guide surface 7a to 7e Inclined surface 8a to 8e Bent portion 9 Paper

Claims (1)

[Scope of utility model registration request] 1. A guide surface (5a) forming a passage for a sheet (9).
5e) and a guide plate (3a to 3e) having an inclined surface (7a to 7e) extending obliquely upward toward the paper entering side of the guide surface toward the entrance direction of the paper (9). A paper guide characterized in that the surfaces (7a to 7e) are bent obliquely outward in a direction in which the outer side in the paper width direction recedes with respect to the entering direction of the paper (9).