JP2579134B2 - Roll recording paper curl removal mechanism - Google Patents

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.
A curl correction rod 24 is provided at the tip of the arm member 23 to correct the curl of the sheet-shaped recording paper 4 being fed to the sheet 2, and the curl correction rod 24 is inserted into the recess 27 of the chassis 26 when the lid 25 is closed. Are engaged with the sheet-shaped recording paper 4 so that the curl of the sheet-shaped recording paper 4 is handled and removed.

[0004] Japanese Patent Application 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.
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 conventional example is solved, the mechanism for properly adjusting the handling angle must be complicated, which leads 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, an elastic roller which is pressed against the surface of the rolled recording paper which is provided between the roll paper storage portion and the transport roller and which is pressed against the storage portion side surface, and rotates with respect to the running direction of the recording paper. A constant back tension is applied, and the recording paper is curled by being handled by the top of the projection member, so that stable performance is obtained without being affected by the diameter of the roll recording paper.

[0011]

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

FIG. 1 is a cross-sectional view of an embodiment of the present invention with a recording paper cover opened, FIG. 2 is a cross-sectional view of the present embodiment with a recording paper cover closed, and FIG. 3 is another embodiment 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, a sponge is exemplified 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 a hollow rubber roller containing air.

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 has an elastic roller which presses and rolls a recording paper against a projection member for handling provided between a roll recording paper storage portion and a transport roller. Thus, the curl is always handled while generating a constant back tension on the running recording paper, so that a stable curl removing performance that is not affected by the remaining amount (the diameter of the roll recording paper) can be obtained. In addition, the structure is very simple because only an elastic roller is used, and cost reduction can be realized.

[Brief description of the 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)

(57) [Claims] An apparatus for storing rolled recording paper wound with sheet-shaped recording paper in a storage section and sequentially feeding and using the sheet-shaped recording paper, wherein a transport roller for transporting the sheet-shaped recording paper; A protruding member which is provided between the storage portion and the transport roller and whose top portion protrudes from a line connecting the feeding portion of the sheet-like recording paper from the storage portion and the transport roller; The sheet-like recording paper is provided so as to be able to freely contact and separate from the surface on the storage section side, and when the sheet-like recording paper is in contact with the surface, the sheet-like recording paper is handled at the top portion and rotates together with the sheet-like recording paper A roll recording paper curl removing mechanism, comprising: 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.