JP2504396Y2 - Paper guide - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper guide attached to a roller that conveys paper to a processing unit such as a printing unit or a reading unit of an information processing apparatus, and has a local curl (hereinafter referred to as "curl") at a corner. That is, the present invention relates to a paper guide suitable for conveying a paper having a sheet.

[0002]

2. Description of the Related Art Printers and image reading devices are equipped with
A roller for conveying the sheet is provided in the processing section. Papers of various widths are usually fed to this type of device, but the conveyance rollers are often shorter than the maximum paper width that can be processed, so that the edges of the paper are not lifted or bent in the processing section. Therefore, a paper guide for expanding the paper is attached to these rollers.

In a conventional paper guide of this type, guide plates are arranged in parallel above and below a paper path, and the paper entrance side is bent so that the upper guide plate is bent upward and the lower guide plate is bent downward. An inclined surface is formed so as to widen toward, and the leading edge of the paper is pressed into the paper passage by this inclined surface.

FIGS. 6 to 8 show a conventional paper guide provided on the downstream side of the printing section 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 integrally connected as a connecting plate 4. . Guide surface 5a of each guide plate 3a-3e
5e has the same surface, and inclined surfaces 7a to 7e directed obliquely upward are connected to the paper entrance side. 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 the axis 6 of the feed roller.
Is parallel to

If the paper 9 is not stored well, the curl 10 may occur at the tip corners, and the curl 10 may occur at the tip corners of the paper 9 due to the printing process 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 comes into contact with 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]

However, in the conventional method of pressing the curl 10 in the direction parallel to the entering direction thereof, if 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 formed. Contact the upper ends of the inclined surfaces 7a to 7e and are folded, so that the inclined surfaces 7a to 7e are folded.
Must be high, and the paper guide becomes large. Even when the rising angle of the curl is large, the inclined surface 7
There is a problem that the curls are folded by a 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 is
It is provided with a plurality of guide plates 3a to 3e located between and at both ends of the plurality of roller elements 2. These guide plates 3a to 3e
Is a guide surface 5a that forms a path for the paper 9 coming in.
5e and inclined surfaces 7a to 7e extending obliquely so as to guide the sheet 9 to the passage.

The guide surface 5 of one of the guide plates 3a provided on the reference side of the paper 3a having the above structure
The bending line of the bent portion 8a formed at the connecting portion between the sheet a and the inclined surface 7a is the same as that of the sheet 9 when viewed from the direction perpendicular to the sheet surface of the sheet 9.
Reference side is inclined in the direction of retraction, therefore the moth
The inclined surface 7a of the id plate is formed obliquely outward so that the outer side in the paper width direction recedes with respect to the entering direction of the paper 9. Further, in the configuration of claim 2, the reference side of the sheet
One guide plate 3a of the
9, the guide surface 5 of the plurality of guide plates 3b to 3e on the side opposite to the reference side
b-5e and the inclined surfaces 7b-7e
The bending lines of the bent portions 8b to 8e are from the direction perpendicular to the paper surface of the paper 9.
When viewed, the side opposite the reference side of the sheet 9 is inclined in the direction of receding.
Therefore, the inclined surfaces 7b to 7e of these guide plates are
Is retracted on the side opposite to the reference side of the sheet 9 with respect to the entering direction.
It is formed diagonally.

[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 come into contact with each other, and the inclined surfaces 7a to 7e become Since the outer side in the width direction is formed to recede, a component force 12 that pushes and spreads the curl 10 outward is generated at the abutting portion, and the curl 10 is expanded.

And even when the height of the curl 10 is high,
As the paper 9 enters, the contact portion moves from the lower side 11 of the curl 10 to the leading end side to extend the curl 10, so that even if the curl 10 is high, the spreading action is effectively exerted and the curl 10 is extended. Since the force acts outward on the inner side of the curl 10, the curl 10 can be extended even when the rising angle of the curl is large.

[0012]

1 to 3 show a first embodiment of the present invention, which is a paper guide when the left end of paper is conveyed as a reference side. The paper guide includes three guide plates 3b, 3c, 3d arranged between the roller elements 2 of the feed roller 1 mounted on a frame (not shown) and two wide guide plates 3a arranged at both ends. 3e. 5
The guide plates 3a to 3e are integrated with the base end connecting plate 4.

The four guide plates 3b to 3e excluding the guide plate 3a on the front side of FIG. 1 have their inclined surfaces 7b to 7e bent obliquely upward toward the sheet entrance side at an angle of about 45 degrees. , The bent portion 8b formed at the base of the inclined surfaces 7b to 7e
The bending line of 8e and the axis 6 of the roller element are parallel. FIG.
The guide plate 3a on the front side is bent obliquely upward so that the inclined surface 7a of the guide plate 3a retracts on the left side in the sheet entry direction.

When the paper 9 having a curled tip enters the paper guide of the present invention, as shown in FIG.
The bent portion 8a of a and the lower portion 11 of the curl 10 at the leading end of the sheet abut, and the outward component force 12 generated at the abutting portion curls 1.
0 is extended outward and guided to the paper passage 13 formed by the upper and lower guide surfaces.

FIG. 4 shows a second embodiment of the present invention. 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 drawing are slanted upward so that the inclined surfaces 7b to 7e of the four guide plates 3b to 7e recede toward the right side in the sheet entry direction. It is bent.

The present embodiment is for carrying sheets of various widths with the left edge of the sheet as a reference side, and the curl 10 can be expanded even if the curl 10 at the edge of the sheet abuts on any guide plate. Curl 10 at both corners of the leading edge of the paper 9
Even when the above occurs, it can be extended and conveyed. When the curl 10 is on an extension of the tread of the roller element 2, the roller element causes the curl 10 to be stretched.

[0017]

[0018]

As described above, the paper guide of the present invention is
Since the expansion force is applied outward on the inner side of the curl generated on the paper to extend the curl as the paper enters, the curl is increased even when the curl height and curl rising angle are large. There is an effect that it can be stretched and guided to the paper path.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential 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. 1;

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

FIG. 5 is a perspective view of a main part of a conventional paper guide.

6 is an enlarged plan view of FIG.

FIG. 7 is a side view of FIG.

[Explanation of reference numerals] 1 feed roller 2 roller elements 3a to 3e guide plate 5a to 5e guide surface 7a to 7e inclined surface 8a to 7e bent portion

Claims (2)

(57) [Scope of utility model registration request] 1. A plurality of axially spaced arrangements
A feed roller (1) with a roller element (2),
So that it extends to the paper entry side between the roller elements and both ends.
Each of the guides is provided with the arranged guide plates (3a to 3e).
The plates (3a to 3e) are guide surfaces (5a to 5e) forming a passage for the paper (9) and an inclined surface (7a) extending obliquely upward toward the paper entrance side of the guide surface toward the paper entrance direction. ~ 7
e) a paper guide having one (3a) inclined surface on the paper reference side of the guide plate
A sheet guide, wherein (7a) is bent obliquely in a direction in which the outer side in the sheet width direction recedes with respect to the entering direction of the sheet (9). 2. An arrangement between a plurality of roller elements and at both ends thereof.
One on the paper reference side of the placed guide plates (3a to 3e)
The inclined surface (7a) of (3a) faces the direction of entry of the paper (9).
And then bend diagonally outward in the direction in which the outer side in the paper width direction recedes.
And a plurality of (3b to 3e) inclinations on the side opposite to the reference side
The sides (7b to 7e) are oriented toward the paper (9)
Be sure that the side opposite to the reference side is bent obliquely in the direction of receding.
The paper guide according to claim 1, wherein: