JPH08192943A - Curl eliminating mechanism for roll recording paper - Google Patents

Abstract

PURPOSE: To eliminate a recording paper curl originated from a roll paper itself in a facsimile device, etc., using a roll recording paper. CONSTITUTION: When a recording paper cover 5 is closed, an elastic roller 6 attached to the recording paper cover 5 is pressed against the surface 7 of a protruding portion 3 to nip the sheetlike recording paper 4 of a roll recording paper 1. Since the elastic roller 6 is indentedly rotated along with the sheetlike recording paper 4 in running, back tension is caused to a running direction in the roll recording paper 1. Since the protruding portion 3 is standingly provided between a housing part 2 for the roll recording paper 1 and a carrying roller 8, the sheetlike recording paper 4 is pressed against the protruding portion 3 by stable force in cooperation with this back tension force, thereby treating a curl in a reverse direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for removing curling of roll recording paper in a facsimile machine or the like.

[0002]

2. Description of the Related Art A typical example of a conventional curl removing mechanism of this type is disclosed in Japanese Utility Model Laid-Open Publication No. 3-38854 and Japanese Patent Laid-Open Publication No. Sho 62-175377.

[0003] Japanese Patent Laid-Open Publication No. Hei 3-38854 shown in FIG.
2 has a curl correcting rod 24 at the tip of the arm member 23 for correcting the curl of the sheet-shaped recording paper 4 being sent to the sheet-shaped recording paper 4. When the lid 25 is closed, the curl correcting rod 24 is placed in the recess 27 of the chassis 26. By engaging with the sheet-shaped recording paper 4, the curl of the sheet-shaped recording paper 4 is handled and removed.

In addition, Japanese Patent Laid-Open No. 62-175377 shown in FIG.
In the publication, a projection member 31 for handling the curl of the sheet-like recording paper 4 from the roll recording paper 1 is movable by a biasing force of a leaf spring 33 into a notch 32 a provided at the tip of a paper guide 32. In accordance with a change in the rotational inertia load according to the size of the roll diameter of the roll recording paper 1, the projection member 31 is moved up and down in the direction of arrow H by the urging force of the leaf spring 33, so that the handling angle is adjusted appropriately. To be adjusted.

[0005]

The above-mentioned conventional curl removing mechanism has the following problems.

In the conventional example shown in FIG. 4, the feed roller 22
In addition, the back tension applied to the sheet-like recording paper 4 passing through the curl correcting rod 24 depends on the remaining amount (diameter or small diameter) of the roll recording paper 1, so that the curl removing effect is not stable.
When the remaining amount of the roll recording paper 1 is small, the curl is not sufficiently removed.

In the conventional example shown in FIG. 5, the above-mentioned FIG.
Although the problem in the prior art example is solved, the mechanism for properly adjusting the handling angle is inevitably complicated, leading to an increase in manufacturing cost.

It is an object of the present invention to provide a roll recording paper which solves the above-mentioned conventional problems, always provides a constant back tension, and realizes a stable curl removing performance which is not affected by the size of the recording paper with a simple structure. It is to provide a decurling mechanism.

[0009]

A roll recording paper curl removing mechanism according to the present invention stores a roll recording paper wound with a sheet-like recording paper in a storage portion, and uses the sheet-like recording paper by sequentially feeding it out. In the apparatus, a conveying roller for conveying the sheet-shaped recording paper, an erect portion provided between the storage section and the conveyance roller, and a top portion of the sheet-shaped recording sheet fed from the storage section to the conveyance roller. And a projection member projecting from a line connecting the recording medium and the projection member, which is provided so as to be capable of coming into contact with and separating from the surface on the storage section side, and is in contact with the surface at the top portion with the sheet-shaped recording paper interposed therebetween. An elastic roller for handling the sheet-like recording paper and rotating with the sheet-like recording paper is provided.

[0010]

According to the present invention, the elastic roller, which is pressed against the surface of the roll-shaped recording sheet, which is provided between the storage section of the roll recording sheet and the conveying roller, on the side of the storage section and rotates together with the roller, presses the recording sheet in the traveling direction of the recording sheet. A certain amount of back tension acts, and the curl of the recording paper is removed by being handled by the top of the protruding member, and stable performance that is not affected by the size of the roll recording paper can be obtained.

[0011]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a recording paper cover in an open state in one embodiment of the present invention, FIG. 2 is a sectional view of the recording paper cover in this embodiment in a closed state, and FIG. 3 is another view of the present invention. It is sectional drawing which shows an Example.

In this embodiment, a storage unit 2 for storing a roll recording paper 1 on which a sheet-like recording paper 4 is wound, and a roll recording paper 1
A transport roller 8 for transporting the sheet-like recording paper 4 fed from the paper feeding unit, and a transport roller 8 provided between the storage unit 2 and the transport roller 8 for feeding out the roll recording paper 1 from the storage unit 2.
A projection 3 having a top 3a protruding beyond a line connecting
A recording paper cover 5 having an opening / closing rotary shaft 5a parallel to the axis of the conveying roller 8 and covering the storage unit 2, and a storage portion of the protrusion 3 provided at one end of the recording paper cover 5 when the recording paper cover 5 is closed. And a sponge-made elastic roller 6 which can be freely moved toward and away from the surface 7 on the part 2 side.

The present embodiment having such a configuration operates as follows. When the recording paper cover 5 is closed, the sheet-like recording paper 4 fed from the roll recording paper 1 in the storage part 2 is stored in the projection part 3 by the sponge elastic roller 6 provided on the recording paper cover 5. It is pressed against the face 7 on the two sides (FIG. 2). At this time, the elastic roller 6 dents and rotates with respect to the running sheet-shaped recording paper 4 to exert a back tension in the recording paper traveling direction, and stands upright between the elastic roller 6 and the transport roller 8. When the sheet-shaped recording paper 4 is pressed against the protrusion 3 with a stable force, the sheet-shaped recording paper 4 is handled in the direction opposite to its own curl direction at the top 3a, and the curl is removed.

In the above-described embodiment, the roll recording paper 1 is fed out from the lower side of the storage section 2. However, as in another embodiment of the present invention shown in FIG.
When the feeding of the elastic roller 6 is performed from above the storage unit 12, the pressing position of the elastic roller 6 can be adjusted by using a part of the storage unit 12. The effect similar to that of the above-described embodiment can be obtained with a slight change.

In this embodiment, the sponge is used as the material of the elastic roller 6, but the elastic roller 6 is not limited to this and may be a rubber roller or an air-filled hollow rubber roller.

In this embodiment, the elastic roller 6 is provided at one end of the recording paper cover 5. However, the present invention is not limited to this.
The elastic roller 6 may have any configuration and action such that the sheet-shaped recording paper 4 is pressed against the surface 7 of the projection 3 in conjunction with the opening / closing operation of.

[0018]

As described above, the present invention is configured to have an elastic roller that presses the recording paper against the handling projection member provided between the roll recording paper storage portion and the conveying roller and rotates around. As a result, by curling the recording paper while it is running while constantly generating a constant back tension, it is possible to obtain stable curl removal performance that is not affected by the remaining amount (diameter size) of the roll recording paper. In addition, it is a very simple structure that only uses elastic rollers, and it is possible to realize cost reduction.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a recording paper cover is opened according to an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment shown in FIG. 1 in an operation state in which a recording paper cover is closed.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view of a first conventional example of a curl removing mechanism.

FIG. 5 is a sectional view of a second conventional example of the curl removing mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll recording paper 2,12 Storage part 3,13 Projection part 3a Top part 4 Sheet-shaped recording paper 5 Recording paper cover 6 Elastic roller 7 Surface 8 Transport roller

Claims (4)

[Claims] 1. A device for accommodating roll recording paper, which is obtained by winding a sheet recording paper, in a storage part, and successively feeding out the sheet recording paper, wherein the conveying roller conveys the sheet recording paper, and A projecting member which is erected between the storage section and the transport roller and has a top portion projecting from a line connecting the transport roller and the portion of the sheet-shaped recording paper fed from the storage section, and the projecting member. The sheet-like recording paper is provided so as to be freely contactable and separable with respect to the surface on the side of the storage portion, and when the sheet-like recording paper is in contact with the surface, the sheet-like recording paper is handled at the top and is rotated together with the sheet-like recording paper And a curl removing mechanism for roll recording paper. 2. The roll recording paper curl removing mechanism according to claim 1, wherein the elastic roller is provided on a lid portion that covers the storage portion so as to be openable and closable. 3. The curl removing mechanism for roll recording paper according to claim 1, wherein the elastic roller is made of sponge. 4. The roll recording paper curl removing mechanism according to claim 1, wherein the elastic roller is a rubber roller or a pneumatic rubber roller.