JP3533176B2 - Roll paper holder structure with double rollers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder of a storage unit for storing roll-shaped paper used as printer paper in electronic devices such as a meter-reading / ordering terminal device with a printer and various terminal devices with a printer. Regarding the structure.

[0002]

2. Description of the Related Art Roll-shaped paper used as printer paper for electronic equipment is usually stored in a roll-shaped paper storage portion provided inside or adjacent to the housing of the electronic equipment, and required from there. A large amount is drawn into the printer of the electronic device for use. 6 and 7
[Fig. 3] is a cross-sectional view showing two examples of the structure of a conventional roll-shaped paper storage unit.

In the first conventional example shown in FIG. 6 (for example, Japanese Patent No. 2872182), there is a roll-shaped paper storage portion 21 that forms a paper storage space together with the holder main body 22, and the roll-shaped paper is stored in this paper storage space. 6 is stored in a so-called throw-in type. In the paper storage space, both a normal roll paper wound with the print surface of the roll paper 6 on the front side and a reverse roll paper wound with the print surface of the roll paper 6 on the back side can be stored. .

Paper outlet 22 below the holder body 22
A paper guide portion 23 that rotatably supports the guide roller 24 is provided in the vicinity of a, and the paper 7 delivered from the delivery port 22a is delivered to the printer body 8 connected to the roll paper storage portion 21.

Of the roll paper 6 stored, the forward winding roll rotates in the direction of arrow a and is pulled out as the paper 7, and the reverse winding roll rotates in the direction of arrow b and the guide roller 24.
The sheet 7 is pulled out as the sheet rotates. At the beginning of storage, the roll-shaped paper 6 rotates in a circular shape that almost fills the paper storage space, but the outer diameter of the circle gradually decreases as consumption and use progresses, and finally the paper 6a becomes the minimum diameter and the small diameter. Become.

The paper 6a having a small diameter is attached to the holder main body 22.
It will be sandwiched between the inner wall of the and the guide roller 24,
In some cases, it will be crushed, and it will not be able to move and will not be able to rotate.

The second conventional example shown in FIG. 7 is intended to solve the above-mentioned drawbacks of the first conventional example as shown in FIG.

The overall structure of the second conventional example shown in FIG. 7 is almost the same as the structure of the first conventional example of FIG. 6, and the different part is below the holder body 22 and faces the guide roller 24. Position, that is, paper 6 having a small diameter in the first conventional example
The point is that a rib 25 projecting inward in a gentle mountain shape is formed just at the position where a cannot be moved due to being sandwiched.

By providing the rib 25 that gently protrudes in a mountain shape in the lower portion of the holder main body 22 as described above, the paper having a small diameter falls on the inclined portion of the rib 25 on the side opposite to the outlet 22a. It is designed to avoid being caught between the guide roller 24 and the guide roller 24.

[0010]

However, even in the above-described second conventional example in which the sheet of a small diameter is pinched and cannot be moved, the roll paper 6 is normally wound. Paper 7 pulled out during transportation
Must always get over the protruding rib 25.
Therefore, as it is used for many years, the rib 25 gradually wears with the lapse of time, and the mountain-shaped tip shape becomes an edge.
Therefore, there is a problem in that the paper of the forward winding roll is scratched and the conveyance resistance increases, which hinders the stabilization of the print quality.

An object of the present invention is to provide a roll paper holder structure capable of accommodating both normal roll paper and reverse roll paper.
Roll paper with a double roller that can solve the above-mentioned conventional problems, prevent increase in paper transport resistance for both forward-winding and reverse-winding roll paper, and not stabilize the paper, and stabilize printing quality Providing a holder structure.

[0012]

A roll paper holder structure with a double roller according to the present invention is an electronic device having a storage portion for storing a roll-shaped paper, and in which the printing surface of the roll-shaped paper is stored in the storage portion. It stores either a forward winding roll wound on the front side or a reverse winding roll wound with the printing surface of the roll-shaped paper on the back side, and sends the roll paper of the normal winding roll or the reverse winding roll to the outside. A holder main body having a delivery port for storing the roll paper and a roll sheet of the reverse winding roll that is rotatably contacted with the roll sheet of the reverse winding roll and the delivery port.
Second rotating member, a roll sheet withdrawing position of the forward winding roll, and the delivery port, which are provided so as to face the first rotating member and rotatably contact the roll sheet of the forward winding roll. And a rotating member.

In this roll paper holder structure with a double roller, it is preferable that the first and second rotating members are guide rollers rotatably attached to a paper guide member provided inside the holder body. .

In another roll paper holder structure with a double roller according to the present invention, a shaft is inserted into the center of the roll-shaped paper, and the shaft is supported in the accommodating section to pull out the roll paper. The roll-shaped paper is rotated around the axis.

In the roll paper holder structure with another double roller according to the present invention, it is preferable that the roll paper holder structure has a spring member for urging the second rotating member toward the pulled roll paper.

Further, in these roll paper holder structures with double rollers, the diameter of at least one of the guide rollers, which are the first and second rotating members, is small on both end sides and large on the center side. It is preferable that the guide rollers, which are the first and second rotating members, are made of resin or rubber.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the structure of the first embodiment of the present invention, FIG. 2 is an exploded perspective view showing the relationship between the holder main body, the paper guide portion and the guide rollers in FIG. 1, and FIG. 3 is this embodiment. FIG. 3 is a front view showing the shape of a guide roller that can be preferably used in this form.

The configuration of the first embodiment shown in FIG. 1 is such that a roll-shaped sheet storage section 1, a holder body 2, a sheet guide section 3,
It is composed of a guide roller 4, a guide roller 5, a roll-shaped paper 6, a drawn-out paper 7 and a printer main body 8. In particular, the roll-shaped paper 6 may be either normal roll paper or reverse roll paper.

The roll-shaped paper storage unit 1 forms a paper storage space together with the holder body 2, and the roll-shaped paper 6 is stored in this paper storage space in a so-called throw-in type. In the paper storage space, both a normal roll paper wound with the print surface of the roll paper 6 on the front side and a reverse roll paper wound with the print surface of the roll paper 6 on the back side can be stored. .

In the roll-shaped paper storage unit 1, when the stored roll-shaped paper 6 is a normal roll paper, the roll-shaped paper storage unit 1 partially contacts the inner wall surface of the roll-shaped paper storage unit 1. Can be rotated in the roll-shaped paper storage unit 1 while partially contacting the inner wall surface of the roll-shaped paper storage unit 1 and the paper guide unit 3, and the reverse roll paper is a guide roller 4 described later. In addition, the normal roll paper is configured to be pulled out along with a guide roller 5 described later.

A paper guide portion 3 with a double roller for rotatably supporting two guide rollers, a guide roller 4 and a guide roller 5, is provided in the lower part of the holder main body 2 near the paper exit 2a. The paper 7 sent from 2a is sent to the printer body 8 connected to the roll-shaped paper storage unit 21.

With reference to FIG. 2, the structure of the paper guide portion 3 with the double roller and the holder body 2 will be described. By inserting the paper guide portion 3 into the holder main body 2 in the direction of arrow A, the main portion of the roll-shaped paper storage portion 1 is configured. A paper delivery port 2a is opened in the holder body 2, and a plurality of ribs 3 are provided on the contact surface of the paper guide portion 3 with the roll-shaped paper 6.
are provided to reduce the frictional resistance between the paper guide portion 3 and the roll-shaped paper 6.

Two guide rollers 4 and 5 are rotatably attached to the paper guide portion 3 at positions opposed to each other at a predetermined distance, and their axes are respectively provided on the paper guide portion 3.
It is fixed to. The guide roller 4 corresponds to reversely wound roll paper, and the guide roller 5 corresponds to forwardly wound roll paper.
When the paper guide portion 3 is inserted into the holder body 2, the positional relationship between the guide rollers 4 and 5 and the positional relationship between the paper delivery port 2a are as shown in FIG.

The guide roller 4 is arranged along the curved surface formed by the outer peripheral surface of the inner wall surface of the roll-shaped paper storage unit 1 and the contact surface of the paper guide unit 3 with the roll-shaped paper 6. Is rotatably provided at a position adjacent to. The reversely wound roll paper 7 pulled out from the roll paper 6 has its conveyance direction changed along the outer peripheral surface of the guide roller 4, passes through the paper delivery port 2a, and passes through the printer main body 8
To be supplied to.

The guide roller 5 has its outer peripheral surface rotatably arranged along the curved surface of the inner wall surface of the roll-shaped paper accommodating section 1, and is positioned so as to face the guide roller 4 at a predetermined distance and at the same time, has an outer peripheral surface. The surface of the roll-shaped paper storage unit 1 projects slightly inward from the inner wall surface of the roll-shaped paper storage unit 1, and the normal-roll paper 7 drawn from the roll-shaped paper 6 is conveyed along the outer peripheral surface of the guide roller 5. , Paper outlet 2
It is supplied to the printer main body 8 through a.

As shown in FIG. 3, both or at least one of the guide roller 4 and the guide roller 5 is so-called crown processed. That is, the diameters of the guide rollers 4 and 5 are small on both end sides and are tapered so as to increase toward the center side, and the center portions of the rollers are parallel portions having a large diameter. By using the guide rollers 4 and 5 having such a shape, the paper 7 to be conveyed is always subjected to the force of approaching the central portion of the guide rollers 4 and 5, so that the paper 7 is conveyed in parallel without being bent. can do.

As the material used for the guide rollers 4 and 5, ABS resin is used in this embodiment,
Not limited to this, depending on the type of paper used and the usage environment,
A rubber material may be used.

Next, the operation when the paper 7 is pulled out from the roll-shaped paper 6 stored in the roll-shaped paper storage unit 1 will be described with reference to FIG. First, when the normal roll paper of the roll paper 6 is set in the roll paper storage unit 1, when the motor (not shown) of the printer body 8 rotates and pulls the paper 7, the roll paper 6 becomes the roll paper. It rotates in the direction of arrow a while partially contacting the inner wall surface of the storage part 1. At this time, since the guide roller 5 that rotates with the sheet 7 that is pulled out from the roll-shaped sheet 6 and conveyed is provided so as to project from the inner wall surface of the roll-shaped sheet storage unit 1, the sheet 7 is guided by the guide roller 5. It is transported while always in contact with. By constantly rotating the guide roller 5 in the paper conveyance direction, the conveyance resistance accompanying the conveyance of the paper 7 can be reduced, and since the guide roller 5 itself can be prevented from being worn, the conveyance resistance can be made constant even after many years of use. . Further, even if the roll-shaped paper 6 is consumed and used to have the minimum diameter, the roll-shaped paper 6 having the minimum diameter is mounted on the two rotating guide rollers 4 and 5, so that the rotation is hindered. It is not conveyed and is completely conveyed to the end of the sheet.

Since the guide roller 5 is crowned as described above, the sheet 7 can be conveyed in parallel without bending. In this way, the paper 7 can be stably and reliably pulled out from the roll paper 6 that is normally wound and stored in the roll paper storage unit 1. As a result, the printer body 8 reliably prints on the sheet 7 pulled out from the sheet outlet 2a.

Further, when the reversely wound roll paper of the roll paper 6 is set in the roll paper storage unit 1, as shown in FIG.
Similarly to the conventional example shown in, the roll-shaped paper 6 pulled as the paper 7 rotates in the direction of the arrow b and guides while partially contacting the inner wall surface of the roll-shaped paper storage unit 1 and the paper guide unit 3. The sheet 7 is pulled out as the roller 4 rotates, the conveying direction of the sheet 7 is changed, and the sheet 7 is supplied to the printer body 8 through the sheet outlet 2a. Also in this case, the conveyance resistance can be reduced and made constant as described above, and the parallel conveyance by the crown processing of the guide roller 4 and the complete conveyance to the end of the roll-shaped paper 6 having the minimum diameter are also performed. it can.

Next, a second embodiment of the present invention will be described. FIG. 4 is a sectional view showing the structure of the second embodiment of the present invention.

As shown in FIG. 4, a shaft 9 is inserted in the center of the roll-shaped paper 6, and the shaft 9 is supported in the roll-shaped paper storage unit 1. When the pulled-out paper 7 is conveyed, the roll-shaped paper 6 rotates about the shaft 9, so that even if the outer diameter of the roll-shaped paper 6 decreases as the paper 7 is pulled out, the roll-shaped paper 6 Rotates stably in the roll-shaped paper storage unit 1 without dancing. Moreover, since the roll-shaped paper 6 supported by the shaft 9 does not come into contact with the inner wall surface of the roll-shaped paper storage portion 1 or the paper guide portion 3, the conveyance resistance is reduced. Further, among the rolled paper 6, the paper 7 from the reverse roll paper that rotates in the direction of the arrow b is
As in the case of the above embodiment, the paper 7 is always pulled out along with the rotation of the guide roller 4, so that the conveyance resistance is further reduced.

Of the roll-shaped paper 6, the paper 7 from the positive roll paper that rotates in the direction of arrow a is conveyed while being in contact with the rotating guide roller 5 when the outer diameter of the roll-shaped paper 6 is large and used. When the outer diameter of the roll-shaped paper 6 gradually decreases due to consumption, the paper 7 comes to be conveyed while coming into contact with the guide roller 4 side, so that the conveyance resistance is further reduced.

As described above, according to the second embodiment, the roll 9 is rotatably supported by the shaft 9, so that the conveyance resistance becomes very small.
Can be smoothly supplied to the printer body 8 through
Further, the complete conveyance of the roll-shaped paper 6 to the end can also be carried out.

Next, a third embodiment of the present invention will be described. The third embodiment further improves the stability of the above-described second embodiment. 5A and 5B show a paper guide portion in the third embodiment, FIG. 5A is an exploded perspective view, and FIG. 5B is an enlarged sectional view of portion B of FIG.

In the above-described second embodiment, the pulled-out paper 7 comes into contact with both the guide rollers 4 and 5 at the stage where the outer diameter of the roll paper 6 in the normal winding is gradually decreasing. There are times when it is not done, and there is a possibility that the stability of paper transport will be somewhat lacking. In order to avoid this, in the third embodiment, the guide roller 5 is biased in the paper 7 direction, that is, in the guide roller 4 direction.

As shown in FIG. 5, there is a paper guide portion 10 capable of urging and moving the guide roller 5 in the direction of the guide roller 4 (the direction of arrow F) as shown in FIG. It is inserted into the holder body 2 to form the roll-shaped paper storage unit 1 (see FIG. 4 for the overall configuration). The structure for urging the guide roller 5 in the arrow F direction is shown in FIG.

In the sectional view of FIG. 5B, bottomed holes are formed in the side walls 10a and 10b on both sides of the paper guide portion 10,
Bearing 11, coil spring 12, screw lid 1 in this hole
3 is provided. The bearing 11 is rotatably fitted in both end shaft portions of the guide roller 5, and the side walls 10 a on both sides of the paper guide portion 10 are rotatably fitted.
The guide roller 5 is rotatably supported between the side wall 10b and the side wall 10b, and is movable in the arrow F direction. Set the bearing 11 to the arrow F
The coil spring 12 biases the coil spring 12 so as to move it in the direction, and the screw lid 13 is screwed into the female screw cut at the entrance of the hole of the side walls 10a and 10b. Screw lid 13
The biasing force of the coil spring 12 can be adjusted by adjusting the amount of screwing in.

According to this structure, the guide roller 5 which receives the urging force of the coil spring 12 comes into contact with the sheet 7 from the normally wound roll-shaped sheet 6 (see FIG. 4), so that the sheet 7 is rolled. As the outer diameter of the sheet 6 is gradually reduced, the guide roller 5 is moved in the arrow F direction (the guide roller 4 direction) by the urging force of the coil spring 12. As a result, the contact of the guide roller 5 with the paper 7 is always maintained, and the outer diameter decreases until the paper 7 comes into contact with the guide roller 4 side. If the contact of the paper 7 is moved to the guide roller 4 side, the contact of the guide roller 5 with the paper 7 is not necessary. Therefore, up to this point
The biasing force of the coil spring 12 may be adjusted by adjusting the screwing amount of the screw lid 13 so that the coil spring 12 can move in the direction (direction of the guide roller 4).

As described above, the roll paper 6 is wound normally.
Since the contact of the sheet 7 with the sheet 7 is transferred from the guide roller 5 to the guide roller 4 without interruption, it is possible to maintain the stability of the sheet conveyance in the middle stage where the outer diameter is decreasing.

In the second and third embodiments described above, as in the case of the first embodiment, both or at least one of the guide rollers 4 and 5 are crowned. It is preferable to have.

[0043]

The first effect of the present invention is that in a roll paper holder structure capable of accommodating both forward-winding and reverse-winding roll-shaped papers, it is possible to prevent an increase in paper-conveying resistance with respect to both forward-winding and reverse-winding roll-shaped papers. Without scarring
That is, it is possible to stabilize the print quality.

The reason for this is that by providing two rotating members (double rollers) that come into contact with both roll papers of normal winding and reverse winding, one of them rotates in contact with the normal roll paper especially near the paper feed port. This is because the rotating member of (1) greatly contributes to the prevention of the increase in the sheet conveyance resistance and can always maintain a constant conveyance resistance, and the rotating member rotates to prevent the abrasion of itself.

The second effect is that when both rolls of paper are thrown in, even if the paper diameter becomes the minimum diameter, the paper cannot be moved because it is pinched or crushed by the inner wall of the storage holder. That is, it is possible to prevent the sheet from becoming unrotatable, and accordingly, the sheet can be completely conveyed to the end of the sheet.

The reason is that the roll-shaped paper having the smallest diameter can be rotated between the two rotating members (double rollers).

The third effect is that the sheets from both the normal winding roll paper and the reverse winding roll paper can be conveyed in parallel. The reason is that the two rotary members (double rollers) are crowned.

A fourth effect is that, in the case of a roll-shaped paper supported by a rotation center shaft, it is always conveyed while being in contact with either of two rotating members (double rollers), and stable conveyance can be performed.

The reason is that by providing a spring member for urging one rotating member in contact with the normally wound roll paper toward the other rotating member, the sheet is always brought into contact with one of the rotating members and is conveyed. Is.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a relationship between a holder main body, a paper guide portion, and guide rollers in FIG.

FIG. 3 is a front view showing the shape of a guide roller that can be suitably used in the embodiment of the present invention.

FIG. 4 is a sectional view showing a structure of a second embodiment of the present invention.

5A and 5B are exploded perspective views showing a paper guide portion according to a third embodiment of the present invention, and FIG.
It is sectional drawing which expands and shows a part.

FIG. 6 is a cross-sectional view showing a first example of a structure of a conventional roll-shaped sheet storage section.

FIG. 7 is a cross-sectional view showing a second example of the structure of a conventional roll-shaped paper storage unit.

[Explanation of symbols]

1,21 Roll paper storage 2,22 Holder body 2a, 22a outlet 3, 10, 23 Paper guide part 3a rib 4, 5, 24 guide rollers 6 roll paper 6a Paper with smaller diameter 7 sheets 8 Printer body 9 axes 10a, 10b Side wall 11 bearings 12 coil spring 13 Screw lid 25 ribs

Claims (6)

(57) [Claims] 1. An electronic device having a storage unit for storing roll-shaped paper, wherein a normal winding roll wound with the print surface of the roll-shaped paper on the front side in the storage unit and printing of the roll-shaped paper. A holder main body that stores any one of a reverse winding roll wound with the surface on the back side, and has a delivery port for sending the roll paper of the normal winding roll or the reverse winding roll to the outside, and the roll of the reverse winding roll. A first rotating member that is provided between the sheet withdrawing position and the delivery port and rotatably contacts the roll sheet of the reverse winding roll; and the roll sheet withdrawing position of the forward winding roll and the delivery port. A roll paper holder with a double roller, comprising a second rotary member that is provided so as to face the first rotary member and that rotatably contacts the roll paper of the forward winding roll. Da structure. 2. The double roller according to claim 1, wherein the first and second rotating members are guide rollers rotatably attached to a paper guide member provided inside the holder body. Roll paper holder structure with rollers. 3. A shaft is inserted into the center of the roll-shaped paper, and the shaft is supported in the storage part so that the roll-shaped paper rotates about the shaft when the roll-paper is pulled out. The roll paper holder structure with a double roller according to claim 1 or 2. 4. The roll paper holder structure with a double roller according to claim 3, further comprising a spring member for urging the second rotary member toward the pulled roll paper. 5. The diameter of at least one of the guide rollers, which are the first and second rotating members, is small on both end sides and is large on the center side. Roll paper holder structure with a double roller according to any of the above. 6. The roll paper holder with a double roller according to claim 1, wherein the guide rollers that are the first and second rotating members are made of resin or rubber. Construction.