JP2001122485A - Roll-form recording paper sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll-form recording paper sheet to be attached fast to a paper tube in the initial stage of sheet winding and capable of being removed from the paper tube at the final printing process without influencing the transporting accuracy of a printer. SOLUTION: The set of the roll-form recording sheet is formed from a paper tube and a sheet whose one end is fixed to the surface of paper tube, wherein the leading edge for winding of the recording sheet is pinched by the paper tube and the sheet and included therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a roll paper in which recording paper such as a printer is wound in a roll shape, and more particularly to a structure of winding recording paper around a paper tube.

[0002]

2. Description of the Related Art Paper used in printers and the like is generally classified into cut paper cut to a fixed size and long roll paper wound around a cylindrical core with a fixed width. It is used properly depending on the application. In particular, in recent years, printing with a long and high-quality inkjet printer represented by panoramic printing has been demanded, and the demand for more convenient roll paper has been increasing.

[0003] Normally, a roll of roll paper is processed by fixing the leading end of the paper to a pipe-shaped paper tube, winding the paper several times while applying a certain tension and slitting it to a certain width. Is done. When a roll paper is used in a printer, printing is performed while pulling out the roll paper by a paper feed roller of the printer.

However, in the last stage of printing on roll paper by a printer, the following problems occur depending on the method of fixing the winding of the paper core and the roll paper.

When the roll paper is firmly fixed to the paper core, the paper is not fed during the printing because the roll paper does not peel off from the paper core during printing, and the paper is not transferred to the same part of the roll paper. Time printing is performed, which causes a failure of the printer head.

[0006] Even when the roll paper is relatively weakly fixed to the paper core, the force required to peel the roll paper from the paper core requires a peeling force greater than the transport capability of the printer. In this case, the paper feed pitch changes, and print quality is disturbed (horizontal stripes).

When the roll paper is completely free of the paper tube, that is, in a state where the paper is not fixed to the paper tube, the position is not determined at the start of winding, and the roll is wound with tension applied. Therefore, it is preferable that the paper tube and the paper are fixed from this point.

When an adhesive tape is used, the adhesive material may remain on the roll paper side, and the adhesive material sticks to a transport roller inside the printer, causing a failure of the printer.

From the above, the last stage of printing on roll paper,
In other words, at the beginning of the winding of the roll paper, basically, it is essential that the roll paper comes off the paper tube with a weak force in the final stage of printing, and that the roll paper is in a fixed state at the time of winding start processing.

[0010]

SUMMARY OF THE INVENTION According to the present invention, in a structure of a roll paper wound in a roll shape, in particular, in a fixing structure of a roll paper and a paper tube at the beginning of winding a recording paper, the paper can be wound around the paper tube. It is an object of the present invention to provide a structure of a roll-shaped recording sheet which can be fixed in a proper state, and in the final stage of printing, the sheet naturally comes off from the paper tube and does not cause a defect in print quality.

[0011]

SUMMARY OF THE INVENTION The present invention comprises a paper tube and a sheet having one end fixed to the surface of the paper tube. The leading end of the roll paper is wound between the paper tube and the sheet. The paper is naturally removed at the final stage of printing so as not to affect print quality, and the roll paper is pinched between the paper core and the sheet even at the time of winding start processing. This provides a configuration in which the paper tube and the leading end of the roll paper are fixed by the frictional resistance between the sheet and the roll paper, and the pressure of the roll paper being wound. explain.

FIG. 1 is a perspective view showing the appearance of a general roll paper, and shows a state in which a roll paper 2 is wound around a paper tube 1.

FIG. 2 is a configuration diagram showing a conventional general roll paper winding start configuration, and shows a state in which the leading end of a roll paper 2 is fixed to a paper tube 1 with an adhesive tape. The configurations shown in FIGS. 1 and 2 have some fatal drawbacks as described above.

FIG. 3 shows the use of a delamination tape 3 in which one surface of the delamination tape 3 is strongly adhered to the paper tube 1 and the other surface is strongly adhered to the roll paper 2. It peels off from the substrate, and it is possible to realize a low peeling force, but it is difficult to adjust the peeling strength of the peeling tape, and it is inevitable that the processing time increases and the peeling force varies. In particular, a small printer having a small conveying capacity has a drawback that a print quality tends to cause a problem in the final stage.

FIG. 4 shows the structure of the delamination tape for reference. In FIG. 4, reference numerals 4 and 4a denote adhesive materials, and reference numeral 5 denotes a tape base material. When the tape base material is peeled, the tape base material is broken and peeled off.

FIG. 5 is a basic structural view showing a state of starting winding according to the present invention. A sheet 6 is fixed to a paper tube 1 with an adhesive tape 7, and a roll paper 2 is placed between the paper tube 1 and the sheet 6. Of the roll paper 2 and the sheet 6 are wound together.

In this configuration, since the roll paper 2 is sandwiched and wound between the paper tube 1 and the sheet 6, the second to third rotations are performed.
At the time of the winding, the roll paper 2 is fixed to the paper tube by the frictional force between the roll paper 2 and the sheet 6 and the winding tension of the roll paper 2.
Can be wound up.

The fixing of the roll paper for the winding start processing in this configuration depends on the frictional force between the roll paper 2 and the sheet 6 and the winding pressure due to the winding tension of the roll paper 2 as described above. Is the coefficient of friction between the back surface 6a of the sheet 6 and the front surface 2b of the roll paper 2,
And the frictional force between the front surface 1 a of the paper tube 1 and the back surface 2 c of the roll paper 2. In any case, the higher the coefficient of friction and the larger the area, the more difficult it is for the roll paper 2 to slip, and the work can be stably performed at the beginning of winding. However, in relation to the winding pressure due to the winding tension described below, especially the frictional force,
There is no need to increase the coefficient of friction.

With respect to the winding pressure of the second roll paper 2 due to the winding tension, it is necessary to wind the roll paper while applying tension to the roll paper. Pressure will be applied. At the beginning of winding, the roll paper is wound at least one turn, and tension is applied after the roll paper is not moved, or another auxiliary fixed roll 8 is set so that the roll paper 2 set between the paper tube 1 and the sheet 6 does not move. (See FIG. 6), it is necessary to press and perform the winding process. At this time, a winding pressure is applied, and the roll paper can be wound with a winding tension by cooperating with the frictional force.

The coefficient of friction between the roll paper 2 and the sheet 6 is as follows:
The friction coefficient between the roll paper 2 and the surface of the paper tube is described in the embodiment, but it is not necessary to particularly set it to a large value.
There is no problem if it is about. Further, the material of the sheet is not particularly limited, and any thin material such as paper and plastic sheet can be used.

The roll paper wound up by the above configuration is printed by a printer. In the final stage, the roll paper 2 is simply sandwiched between the paper tube 1 and the sheet 6, and the winding pressure is also eliminated. Therefore, the roll paper naturally comes off the paper tube, and does not affect the conveyance force of the printer at all.

The above is the basic configuration of the present invention. Several examples will be shown below to describe the present invention in more detail, and also explain practicality and effects.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has been specifically carried out and its effects have been confirmed. The results are shown below.

(Embodiment 1) This embodiment is shown in FIG. 5, and the basic configuration is as described above, and the specific contents are as follows.

Specifications of Roll Paper 2 and Paper Core 1 Roll paper width: 100 mm, roll paper thickness: 0.23
mm, roll paper roll length: 10m, paper tube length: 100
mm, paper tube inner diameter: 50.8 mm, paper tube outer diameter: 60 mm, paper tube material: paper hard paper tube and step-prevention paper tube (step-prevention paper tube:
The surface of the paper tube is made of a Styrofoam soft sheet (thickness: 2 mm) so that the thickness of the end of the roll paper can be absorbed. With a coefficient of about 0.6), sheet thickness: 0.1 mm and 0.05 mm, sheet width A: 90 mm, sheet length B: 130 mm Configuration As shown in FIG. Fix the paper with cellophane tape, insert the roll paper 2 between them, wind the roll paper about 1.5 laps by hand winding, and then mechanically wind the roll paper to about 3 kg (standard winding tension 0.03k
g / mm). In addition, the method of starting winding was performed not by hand winding but by using an auxiliary fixed roll.

As a result, in the combination under these conditions, the winding process was possible without any problem, and the roll paper did not come off due to the winding tension. However, in the combination of the step prevention paper tube and the thin sheet of 0.05 mm, although there was no problem in the winding process, the sheet slightly wrinkled at the time of winding (there was no particular problem in use). It is considered that the reason for the occurrence is that the surface of the paper tube is soft, the sheet is thin, and the winding tension is applied.

As is clear from the above, the material of the sheet is not particularly limited as long as it is ordinary paper, and there is no problem if the width A of the sheet is approximately the width of the roll paper. Further, the length of the sheet may be short, but it is desirable to appropriately determine the length of the sheet from the ease of the work at the start of winding. As for the thickness of the sheet, if it is too thin, wrinkles may occur.
It is desirable to use one having a thickness of 0.05 mm or more.

On the other hand, in the final stage of printing, since the roll paper was not fixed to the paper tube, it was separated naturally, and no problem occurred in the printing result.

(Embodiment 2) Embodiment 1 is a sheet (plain paper).
Is set to approximately the width of the roll paper, and the coefficient of friction with the roll paper is generally about 0.6. In this embodiment, the width A of the sheet (plain paper) is further reduced. At the same time, the friction coefficient was adjusted to a relatively small value (about 0.3) (the other specifications were the same as in Example 1).

Implementation Specifications The roll paper and the paper tube used had the same specifications as in the first embodiment. Sheet width A: 50 mm, 30 mm vs. coefficient of friction for roll paper: 0.3 In each of the combinations, winding start processing could be performed without any problem, but the roll paper width A: 30
About mm, the width is small, and the one with a small friction coefficient is slippery, so it was a little difficult to work,
The roll paper did not come off even when the winding tension was applied.

From the above, the width A of the sheet is not particularly limited, but is preferably set to 30% or more of the width of the roll paper. The coefficient of friction with the roll paper is not particularly limited, but is preferably at least 0.3 or more.

(Example 3) In this example, the material of the sheet 6 was not a paper but a polyethylene film sheet having a thickness of 0.1 mm, and was carried out under the conditions of the first and second examples. Incidentally, three types of polyethylene film sheets were prepared: a mirror-finished surface, a satin-finished surface, and a laterally-scored sheet having fine irregularities.

As a result, in the case of a plastic sheet, for a sheet having a sheet width A of 30 mm, winding is extremely difficult. The reason is that there is no rigidity, so work is difficult.

In the surface condition of the sheet, the mirror surface and the matte surface are slippery and are difficult to wind. But,
Since the transversely rugged sheet with fine irregularities has a large frictional resistance, the winding work was easily performed.

When the sheet 6 is made of a plastic sheet and the surface condition is small such as a mirror surface or satin finish, the size of the sheet needs to be larger than that of paper. However, in the case of a sheet with a horizontal stripe having fine irregularities, the coefficient of friction is equivalent to 0.6, and the sheet may be treated as if it were made of paper. However, because it is less rigid than paper,
It is desirable to use it with improved handling.

Although several embodiments of the present invention have been described above, in practicing the present invention, the material of the sheet 6 and the material of the sheet 6 are considered in consideration of the size of the roll paper, the roll winding machine, and the workability at the start of winding. It is necessary to select the size, coefficient of friction, and the like.

[0037]

By implementing the present invention, it is possible to obtain the following basic effects of roll paper production which is the object of the present invention.

In the final stage of the roll printing, the roll paper comes off naturally without resistance, so that the influence of the change in the printer conveyance force can be completely eliminated, and the disturbance of the printed image can be eliminated.

The roll paper is sandwiched between the paper core and the sheet bonded to the paper core, and can be wound by only slightly rotating, so that the existing machine can be used as it is and the production efficiency can be improved. .

[0040]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a general roll paper structure.

FIG. 2 is a perspective view showing a state of a sheet at a winding start portion of a conventional general roll sheet structure.

FIG. 3 is a perspective view showing a state of a paper at a winding start portion of a roll paper structure formed of a double-sided adhesive tape or a delamination tape.

FIG. 4 is a cross-sectional view showing a configuration of a delamination tape.

FIG. 5 is a perspective view showing a basic configuration of a winding start portion of the roll paper of the present invention.

FIG. 6 is a cross-sectional configuration diagram showing a winding start method using an auxiliary fixing roll at the start of winding of the roll paper of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper core 1a Paper core surface 2 Roll paper 2a Roll paper winding start tip 2b Roll paper surface 2c Roll paper back surface 3 Delamination tape 4, 4a Adhesive material 5 Tape base material 6 Sheet 6a Sheet back surface 7 Adhesive tape 8 Auxiliary fixing roll A Sheet width dimension B Sheet length dimension

Claims (3)

[Claims] 1. A paper winding machine comprising a paper tube and a sheet having one end fixed to the surface of the paper tube, and a winding start end of a roll paper being sandwiched between the paper tube and the sheet. Characteristic roll-shaped recording paper. 2. The roll-shaped recording paper according to claim 1, wherein the width of the sheet is smaller than the length of the paper tube. 3. The roll-shaped recording paper according to claim 1, wherein the surface of the plastic sheet is formed in a state of fine horizontal stripes.