JPS61178357A - Automatic paper aligner - Google Patents

Abstract

PURPOSE:To align papers by a simple construction for an automatic paper aligner used for a recorder by changing a paper holding force produced by drive and driven rollers to cause a slip between the papers. CONSTITUTION:A drive roller 5 is mounted on a drive roller shaft 12. The shaft 12 is connected with a paper feed motor and feeds a paper 8. A driven roller shaft 13 is connected to a drive member 14 connected at one end thereof to a motor 16. The rotation of the motor 16 brings the drive and driven rollers 5 and 6, respectively, into contact with each other or separates one of both the rollers 5 and 6 from the other. In normal paper feed, the paper 8 is fed as sandwiched between the drive and driven rollers 5 and 6, respectively. In paper alignment, the drive roller 5 is rotated in a given direction and in a given speed. At this time, slip is caused between the papers 8 by decreasing the force for holding the paper 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic paper alignment device for an apparatus in which recording paper is inserted and driven by a driving roller and a driven roller. Such automatic sheet alignment devices are often used in recording devices.

[Conventional technology]

FIG. 3 shows a general configuration of a recording apparatus that inserts and drives a sheet using a driving roller and a driven roller.

In FIG. 3, l is a recording pen, 2 is a carriage, 3 is a belt, 4 is a pen drive motor, 5 is a drive roller, 6 is a driven roller, 7 is a paper feed motor, 8 is paper, 9 is a recording table, 10 is a A paper supply roll, 11 a paper take-up roll, and 12 a drive roller shaft.

The paper 8 pulled out from the paper supply roll 10 passes over the recording table 9 and is taken up by the paper take-up roll 11. The paper 8 on the recording table 9 is inserted into a drive roller 5 embedded in the recording table 9 and a driven roller 6 that engages with the drive roller 5. The drive roller 5 is driven under the control of a paper feed motor 7. Therefore, the paper 8 is fed under the control of the paper feed motor 7.

A recording pen 1 is fixed to a carriage 2.

The carriage 2 is connected to a pen drive roller 4 via a belt 3. Therefore, the recording pen 1 is driven as desired by the controlled pen drive motor 4.

From the relative movement of both paper 8 and recording pen 1,
A desired record is made on the paper 8.

To further explain the operation of this type of recording apparatus, first, as a pre-recording step, the paper 8 is pulled out from the paper supply roll 10 by the amount necessary for recording by a paper feeding means consisting of a drive roller 5 and a driven roller 6. At this time, the paper take-up roll 11 (paper take-up motor 111) does not perform a winding operation, so that a hanging portion is formed on the paper 8 as shown in FIG. This hanging portion is necessary for smoothly transporting the paper 8 in the front-rear direction (indicated by the arrow in the figure) during the recording operation.

At this point, the recording operation begins. The recording pen 1 and the recording paper 8 are driven by the arrival of the recording signal, and two-dimensional recording is performed on the paper 8.

When the recording is completed, a paper take-up motor 111 connected to the paper take-up roll 11 operates, and the paper 8 is wound onto the take-up roll 11.

By repeating these operations, a long recording paper can be used.

However, in this way, the driving roller 5 and the driven roller 6
As mentioned above, the device for inserting and driving the paper 8 is provided with paper drive means each consisting of a drive roller 5 and a driven roller 6 at both ends of the normal paper.

By the way, in this case, if there is a feeding error in the paper drive means provided at both ends, or due to recording conditions, etc.
In some cases, uneven feeding occurred at both ends, causing sheet misalignment. In order to eliminate this drawback, a typical conventional automatic paper aligning device of this type is published in Japanese Patent Application Laid-open No. 55
There was a device described in Publication No. -93016. This device is equipped with a sensor that detects the inclination of the paper, a pivot that presses only one point on the paper, and a means for rotating the paper around this pivot. By interacting with these elements, the paper is automatically aligned. It is something.

[Problem that the invention seeks to solve]

As described above, conventional paper automatic alignment devices detect the inclination of the paper and are provided with a paper alignment means that compensates for this inclination, but these means have complicated structures and their mutual relationships are also complicated. The disadvantage was that it required precise operation control.

The present invention has been made to eliminate such drawbacks.

[Means for solving problems]

For this reason, the present invention first proposed an automatic paper alignment device applied to this type of recording device in Japanese Patent Application No. 197354/1983 (hereinafter referred to as the applicant's earlier application) as an improvement on this point. .

This device aligns sheets by intermittently bringing a drive roller and a driven roller into contact with and away from each other.

The present application is a further development of the previously filed automatic paper aligning device, which is configured to align the paper by causing the paper to slip in a device that inserts and drives the paper using a driving roller and a driven roller. This is what I did.

As a means for causing slippage, for example, means for changing the holding force of the paper by the driving roller and the driven roller can be used.

[Effect]

First, before giving a detailed explanation of the present invention, the operation of the invention of Japanese Patent Application No. 1973-1981, which is the applicant's earlier application, will be explained. See Figure 2.

Normally, back tension (this back tension is caused by, for example, the weight of the paper 8) is applied to the paper 8 in its feeding direction. When the paper 8 is displaced in a direction perpendicular to the feeding direction, a force is applied in a diagonal direction in combination with the force of this back tension. In FIG. 2, a broken line indicates a state in which the paper 8 has not shifted, and a solid line indicates a state in which the recording paper 8 has shifted. 6 is a driven roller, 8 is paper, and 10 is a paper supply roll.

When paper misalignment occurs, a force indicated by arrow A is generated in the diagonal direction. Further, the paper driving means including the driven roller 6 generates a force indicated by arrow B on the paper 8. Therefore, as a resultant force, a force C that aligns the sheets 8 is also acting at the same time. However, in this state, pressure is being applied to the paper 8 by the paper drive means, and due to variations in pressure, a force that causes a larger shift continues to act on the paper 8.

Therefore, the above-mentioned force C may be applied effectively. For this reason, in the applicant's earlier invention, the driving roller 5 and the driven roller 6 were brought into contact with and separated from each other intermittently.

For example, when the driven roller 6 is lifted up intermittently to perform intermittent contact/separation operations, the moment the driven roller 6 separates from or contacts the paper 8 (or the driving roller 5 via this). The sheets 8 are aligned due to slipping of the sheets 8.

That is, when aligning the sheets 8, it is sufficient to cause the sheets 8 to slip.

In addition, in this case, use i! The back tension of lE8 also occurs as a reaction to the force in the feeding direction of paper 8 due to the slipping operation.

[Embodiment] Fig. 1 is a configuration explanatory diagram showing one embodiment of the present invention, Fig. 1 fa) is a perspective view of the main part thereof, and Fig. 1 (b) shows an example of control for aligning sheets. It is something.

The drive roller 5 is mounted on a drive roller shaft 12. Furthermore, although not shown, the drive roller shaft 12 is coupled to a paper feed motor and drives the paper 8. Followed roller 6
is rotatably mounted on the driven roller shaft 13 via a mounting tool. Furthermore, this driven roller shaft 13 is connected at one end to a drive piece 14 that is connected to a motor 16.
6, the driving roller 5 and the driven roller 6 are rotated.
The structure is such that the two come into contact with each other and separate from each other.

During normal paper feeding operation, the paper 8 is moved by the drive roller 5.
and the driven roller 6 and are driven.

During paper alignment, the drive roller 5 rotates in a predetermined direction at a predetermined speed. At this time, the drive piece 14 and the motor 16
As a result, the holding force between the driven roller 6 and the driving roller 5 on the IF and 8 is reduced (the driven roller 6 is moved in a direction away from the driving roller 5), thereby causing the paper 8 to slip. Paper alignment control can be performed, for example, by the method shown in FIG. 1(b). Figure 1 (
The graph shown in b) shows the driving roller 5 and driven roller 6 on the vertical axis.
The horizontal axis represents time.

In the figure, the value indicated by A is the relative distance between the drive roller 5 and the driven roller 6 at which the paper 8 slips. By putting the sheets in a slip state, they can be quickly aligned.

Note that a solenoid, for example, may be used to change the holding force of the driving roller 5 and the driven roller 6 with respect to the paper 8.

〔Effect of the invention〕

As described above, according to the present invention, sheets can be aligned with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an automatic sheet aligning device according to the present invention, FIG. 3 is an overall configuration diagram of a recording device according to the present invention, and FIG.
The figure is a schematic diagram illustrating paper misalignment. 5-driving roller, 6-driven roller, 8-paper, 14
- Drive piece. Patent applicant: Graphic Co., Ltd. Figure 3

Claims (2)

[Claims] (1) Regarding an automatic paper alignment device of a device in which paper is inserted and driven by a drive roller and a driven roller, means is provided for aligning the paper by causing the paper driven by the drive roller and the driven roller to slip. An automatic paper aligning device characterized by: (2) The automatic sheet aligning device according to claim 1, characterized in that the holding force of the sheet by the driving roller and the driven roller is made variable as means for causing the sheet to slip.