JPH0558526A - Rolled paper curl removing device - Google Patents

Abstract

PURPOSE:To eliminate curling habit of the rolled paper and prevent defective stack by providing a member to press the rolled paper in the direction opposite to protrusion of a wall part and a pressing member which is capable of pressing the rolled paper at the rear end part, and brings the tip part into contact with an outer circumferential part of the rolled paper. CONSTITUTION:There are provided a wall part 2a which is protruded across the whole width of the paper at the paper discharging side of a rolled paper accommodating part 2, a pressing member 5 to press the rolled paper 1 discharged in contact with the wall part 2a in a sliding manner in the direction opposite to the protrusion of the wall part 2a, and a pressing member 7 which is held and energized by a plate- shaped spring member 6 and presses the rolled paper 1 which is brought into contact with the wall part 2a in a sliding manner at the rear end part 7a, and brings the tip part 7b into contact with the outer circumferential part 1a of the rolled paper accommodated in the rolled paper accommodating part 2. This arrangement allows the tip part 7b of the pressing member 7 to be leaped up outward and the rear end part 7a to be separated from the rolled paper in contact with the wall part 2a in a sliding manner when the outer diameter of the rolled paper 1 accommodated in the rolled paper accommodating part 2 is large.

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 recording unit for recording on roll paper by a facsimile machine, a printer or the like, and relates to a device for removing curl habit of roll paper.

[0002]

2. Description of the Related Art A side view of FIG. 4 shows a recording section and a curl removing device of a thermal recording system which heats a thermal recording sheet with a thermal head to record information.

The thermal recording system is used in a facsimile machine or the like because of its simple structure. In the figure, 1 is a roll paper which is a thermal recording paper. The roll paper 1 is stored in the roll paper storage unit 2 so that the paper winding direction is clockwise in the drawing.

The roll paper accommodating portion 2 is provided with a wall portion 2a provided on the paper discharge side so as to project along the entire width of the paper, and the roll paper 1 that is rewound and discharged exceeds the wall portion 2a and the recording portion. It is supposed to be transported to.

The recording unit comprises a thermal head 3 and a pressing roller 4, and the roll paper 1 discharged from the roll paper accommodation unit 2 is pressed by the thermal head 3 by the pressing roller 4 and heated by the thermal head 3. Dot recorded.

The recorded roll paper 1 is discharged from the recording section to the left in the drawing by the rotation of the pressing roller 4. The roll paper 1 has a curl tendency in the winding direction, and if it is discharged from the recording unit in this state, stacking failure occurs when it is stacked on a stacker (not shown).

In order to prevent this, the roll paper 1 is subjected to the work of removing the curl habit before it reaches the recording portion.
The curl removal is performed by the wall portion 2a and the pressing member 5 provided between the wall portion 2a and the recording portion.

The pressing member 5 is, for example, a leaf spring J
The roll paper 1 is bent in the shape of a letter V and protrudes in the direction opposite to the protruding direction of the wall portion 2a on the paper route, and the roll paper 1 that is slidably contacted with the wall portion 2a and is discharged is pressed in the direction opposite to the curl tendency. I am curving and taking a curl habit.

[0009]

As described above, the curl habit of the roll paper is removed, but as shown by the solid line in FIG. 4, when the roll paper is initially thick, its own weight is large and the paper between the wall and the pressing roller is large. The tension is great, and the curl habit can be removed well.

However, when the roll paper is used and becomes thinner as shown by the one-dot chain line and the two-dot chain line, the weight of the roll paper decreases and the tension of the paper decreases accordingly. Then, although the roll paper has a small diameter and a strong curl tendency, there is a problem that curling cannot be sufficiently performed.

An object of the present invention is to prevent curling habits of roll paper and prevent stack defects.

[0012]

In the present invention, FIG.
As shown in the side view of FIG. 3, the wall portion 2a projecting from the paper discharge side of the roll paper storage portion 2 and the roll paper 1 discharged by sliding contact with the wall portion 2a are pressed in a direction opposite to the protruding direction of the wall portion 2a. Member 5
The spring member 6 holds and biases the rear end portion 7a to the wall portion 2a.
The roll paper 1 which is in sliding contact with the roll paper 1 can be pressed and the front end portion 7b is accommodated in the roll paper accommodation portion 2
And a pressing member 7 that abuts the outer peripheral portion 1a of the.

The distance from the rear end portion 7a of the pressing member 7 to the leading end portion 7b is made variable so that the roll paper pressing time of the pressing member 7 can be set according to the outer diameter of the roll paper, and the wall portion 2a Further, both or one of the sheet contact portions of the folding member 5 is made of a rigid body or an elastic member 8 so that the friction resistance with the roll paper 1 can be adjusted, and further, the sheet contact portion 2a 'of the wall portion 2a.
Is removable.

[0014]

When the outer diameter of the roll paper in the roll paper accommodating portion is large, the front end of the pressing member is flipped up outward, and the rear end thereof is separated from the roll paper slidably contacting the wall.

Therefore, in this case, the roll paper is not pressed by the pressing member. As the outer diameter of the roll paper becomes smaller, the front end portion of the pressing member moves inward, and the rear end portion presses the roll paper slidably contacting the wall portion.

As a result, the tension of the paper between the wall and the pressing roller increases. Further, by changing the distance from the rear end portion of the pressing member to the leading end portion, the position where the leading end portion of the pressing member abuts on the outer peripheral portion of the roll paper is changed. Then, the position of the rear end portion with respect to the wall portion also changes, and the time when pressing is changed.

By constructing both or one of the wall portion and the paper contact portion of the pressing member with a rigid body or an elastic member, the frictional resistance with the roll paper can be adjusted and the tension of the paper can be arbitrarily changed. Is possible.

Further, by making the paper contacting portion of the wall portion detachable, it becomes easy to replace the paper contacting portion with various friction coefficients and the frictional resistance with the roll paper can be easily adjusted.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as shown in the side view of FIG. 1, a wall portion 2a protruding along the full width of a sheet on the sheet discharge side of a roll sheet storage portion 2 and in sliding contact with the wall portion 2a. A pressing member 5 that presses the ejected roll paper 1 in a direction opposite to the protruding direction of the wall portion 2a and a leaf spring-like spring member 6 are held and urged to the rear end portion 7.
and a pressing member 7 that presses the roll paper 1 that is in sliding contact with the wall portion 2a by a and that makes the leading end portion 7b contact the outer peripheral portion 1a of the roll paper 1 accommodated in the roll paper accommodation unit 2. It was done like this.

As a result, when the outer diameter of the roll paper 1 accommodated in the roll paper accommodating portion 2 is large, the tip end portion 7b of the pressing member 7 is flipped up outward, and the rear end portion 7a thereof is a wall portion. There is no pressing of the roll paper 1 by the pressing member 7 apart from the roll paper 1 slidingly contacting the 2a.

In this case, however, the weight of the roll paper 1 is sufficient, and the pressing of the roll paper 1 by the pressing member 7 is unnecessary. As the outer diameter of the roll paper 1 becomes smaller, the front end portion 7b of the pressing member 7 moves inward, and the rear end portion 7a becomes the wall portion 2.
The roll paper 1 that is in sliding contact with a is pressed.

Accordingly, the tension of the paper between the wall portion 2a and the pressing roller 4 is increased by compensating for the decrease in the tension of the paper accompanying the weight reduction of the roll paper 1. As shown in the side view of FIG. 2, the pressing member 7 has a rear end portion 7a to a front end portion 7b.
By varying the distance to reach, the position at which the front end portion 7b of the pressing member 7 abuts the outer peripheral portion of the roll paper 1 changes.

As a result, the position of the rear end portion 7a with respect to the wall portion 2a also changes, and the timing of pressing is changed. As a result, it is possible to deal with various roll papers 1 having different curl due to reasons such as different paper quality and different manufacturers.

Means for varying the distance from the rear end portion 7a to the front end portion 7b of the pressing member 7 is, for example, dividing the pressing member 7 into two in the longitudinal direction, providing a long hole on one side and a screw on the other side, and connecting them to each other. By stacking and fixing with machine screws 9, it is possible to change within the range of the long hole.

Further, as shown in the side view of FIG. 3, both or one of the wall portion 2a and the sheet contact portion of the pressing member 5 is made of an elastic member 8 such as a rigid body or rubber, so that friction with the roll paper 1 is obtained. It becomes possible to adjust the resistance.

This makes it possible to arbitrarily change the tension of the paper. Furthermore, by making the paper contact portion 2a 'of the wall portion 2a removable, it becomes easy to replace the paper contact portion 2a' with various friction coefficients, and the friction resistance with the roll paper 1 can be easily adjusted. Becomes

The means for making the paper contact portion 2a 'attachable / detachable includes, for example, a locking claw provided on the paper contact portion 2a', and a wall portion 2a.
The locking claws may be pushed into the recesses to lock.

[0028]

EFFECTS OF THE INVENTION According to the present invention, the tension in the curl habit removing portion of the roll paper is sufficient, and the curl habit can be satisfactorily removed.

[Brief description of drawings]

FIG. 1 is a side view of a roll paper curl removing device according to the present invention;

FIG. 2 is a side view showing another first embodiment of the roll paper curl removing device of the present invention;

FIG. 3 is a side view showing another second embodiment of the roll paper curl removing device of the present invention;

FIG. 4 is a side view of a conventional roll paper curl removing device;

[Explanation of symbols]

1 roll paper, 1a outer periphery,
2 roll paper accommodating portion, 2a wall portion, 2a 'paper contact portion, 4 pressing roller, 5 and 7 pressing member, 6 spring member, 7a rear end portion,
7b tip part, 8 elastic member,
9 machine screws,

Claims (4)

[Claims] 1. A wall portion (2a) projecting from a paper discharge side of a roll paper accommodating portion (2) and a roll paper (1) discharged by sliding contact with the wall portion (2a). The member (5) that presses in the direction opposite to the protruding direction of (2a) and the spring member (6) hold and urge the rear end (7a) to the wall (2).
The roll paper (1) that is in sliding contact with (a) can be pressed and the leading end (7b) is placed on the outer peripheral portion (1a) of the roll paper (1) stored in the roll paper storage section (2). Abutting pressing member (7)
A roll paper curl removing device, comprising: 2. The pressing member (7) according to claim 1, wherein a distance from a rear end portion (7a) to a leading end portion (7b) of the pressing member (7) is variable and the pressing member (7) has a corresponding outer diameter. An apparatus for curling roll paper, characterized in that the time when the roll paper is pressed can be set. 3. The wall portion (2a) according to claim 1 and / or the paper contact portion of the bending member (5) are either rigid or elastic.
A roll paper curl removal device comprising (8) and capable of adjusting frictional resistance with the roll paper (1). 4. The paper contact portion (2a) of the wall portion (2a) according to claim 3.
The roll paper curl removal device is characterized in that it is removable.