JPS602564A - Curl curing device for paper - Google Patents

Abstract

PURPOSE:To enable curing of a curl to be properly made on a paper, by a method wherein a roller, positioned facing a belt, is energized by an amount proportioning the set angle of a cam. CONSTITUTION:With a switch actuated, a cam 32 is turned by an angle, previously stored in a control circuit 34, with the aid of a motor 33 to bring a point (b) on a peripheral surface 32a of said cam into contact with a roller 30c. This causes the roller 30c to be energized more intensely toward the belt 30b side than said roller positioned when it is forced into contact with a point (a) of the cam 32, and the amount, energized toward the belt 30b side, of rollers 30a is specified. If such energizing amount is set depending upon various papers 40 on which curing of a curl is effected, such setting enables a curl curing amount to be properly exerted on each of various papers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper curl correction device trap, and more specifically, a belt and a roller are installed facing each other in a paper conveyance path, and the above-mentioned belt NfC is installed. The present invention relates to a paper curl correction device that corrects the curl of the paper by energizing the roller to bend the belt and passing the paper between the belt and the roller.

[Prior art]

FIG. 1 shows a copying machine equipped with a conventional paper curl correction device l.

In this copying machine, as the photoreceptor drum l rotates, a charging corotron 2 uniformly charges the surface of the photoreceptor drum l, and then a document 4 placed on a platen 3 is charged.
The calligraphy information is optically scanned by light irradiation from a light source 5, and the reflected light 6 at this time is incident on the photoreceptor drum IK via an optical system constituted by reflecting mirrors 7a, 7b and a lens 8.
A latent image is formed on the surface of the photoreceptor drum 1 in a manner corresponding to the calligraphy/picture information of the original 4. Next, in this copying machine, this electrostatic latent image is made visible by a developing device 9, and the resulting toner image is transferred onto a charged sheet 11 by a transfer corotron 10. Further, in this copying machine, residual toner on the photoreceptor drum 1 and the surface of the photoreceptor drum after the transfer is removed by a cleaning device 13, and the surface of the photoreceptor drum 1 is illuminated by a static elimination lamp 14 to completely remove the residual toner. The charge is removed to enable repeated use of the photoreceptor drum 1, and after that, the charging corotron 2 charges the surface of the photoreceptor drum 1 again. Thereafter, the above operation is repeated. In this way, the paper 11 on which the toner image has been transferred is fixed by the pressure and heat fixing device 15, and then curl-takar correction of the paper 11 that occurred during transportation (for example, while passing through the pressure and heat fixing device 15) is performed. removed by device 16. This curl correction device 16 includes a roller 16al1 in the paper conveyance path 17.
The roller 160 is installed to face the copying machine frame, etc., and is movable in a direction perpendicular to the paper conveyance path 17 and rotatably attached to the frame, etc. of the copying machine. be. That is, in this curl correction device 16, the belt 161) is urged against the roller 160 to bend the belt 16b, and the paper 11 is passed between the thus bent belt 16b and the roller 160 to remove the paper 11. By squeezing the paper, the curl of the paper 11 is corrected. In FIG. 1, 18 is a paper tray on which recording sheets are stacked, and 19 is a feed roller that feeds the recording sheets from the paper tray 18.

By the way, the paper used in the copying machine etc. has a thickness,
There are various types of paper in terms of quality and size, and due to these differences, the thickness of the raw Zir curls during transportation of the paper also varies.

Therefore, in the conventional paper curl correction apparatus, it is necessary to be able to perform curl correction in accordance with the type of paper.

However, this curl correction device is configured to manually change the amount of bias applied to the bells (161) to 16C according to the type of paper, thereby obtaining an appropriate amount of curl correction. .

Therefore, this curl correction device is extremely complicated to handle.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a paper curl correction device that allows easy switching of the curl correction amount and allows the switching operation to be performed reliably.

[Structure of the invention]

A roller installed opposite the belt on the paper conveyance path,
A cam is installed in relation to the cam, and a motor is installed to rotate the cam, and the motor rotates the cam by a set angle, thereby defining the amount of urging of the roller to the belt. The curl correction amount of the paper can be controlled by the following.

〔Example〕

Below, regarding the paper curl correction device related to misfire 0ha,
A detailed description will be given with reference to the accompanying drawings.

FIGS. 2 and 3 show an embodiment of the paper curl correction device according to the present e874K.

In the paper curl correction device of this embodiment, the roller 30a
, belt 301) wound around 30a and roller 30
0 on the paper conveyance path 31 facing each other,
A cam 32 and a motor 33 are installed in relation to the roller 30C. That is, the rollers 30a, 30a are connected to a power source (not shown), and when the roller 30a is rotationally driven, the belt 30b is rotationally driven. Further, the row 2300 is supported by a guide trap on a frame (not shown) so that it can rotate freely and move up and down. The cup 32 is formed such that its circumferential surface 32a has a gradually decreasing curvature, and a stepped portion 32kl is formed at the point where the curvature is the smallest. The cam 32 has a peripheral surface 32a that is a roller 31CK.
For example, the rollers are brought into contact via bearings so that the rotation of the rollers is not hindered. The motor 33 has a switch SW
, ~SW, the rotation of which is controlled by a control circuit 34. Accordingly, the cam 32 is rotated by the motor 33. That is, when the motor 10 operates the switch SW1 (if the switch is normally open, it is closed; if it is normally closed, it is opened), the motor 10 moves the point a on the circumferential surface 32a of the cam 320. Low 230Q
In this case, point b of the cam 32 is brought into contact with the roller 30C, and in the same manner, the swings 5-sw, , sw, , and W are brought into contact with the roller 30C. When pressed, the 0 point, d point, 0 point on the circumferential surface of the cam 320
Each point is brought into contact with the roller 30C. Further, the control circuit 34 determines that point f on the circumferential surface 32 of the cam 320 is located at the roller 300.
switch sw6' for detecting that it is in contact with
y equipped. That is, when the point f of the circumferential surface 32a of the cam 32 is in contact with the roller 300, the stepped portion 3211 of the cam 32 is the actuator SW of the switch SW,
The switch is actuated when it comes into contact with a, and the control circuit 34 determines this. Note that the control circuit 35 having such a function can be easily constructed using conventional technology, such as using a microcomputer, so a detailed explanation thereof will be omitted. Also, the second
In the figure, 32C and 33a are gears installed on the cam 32 and the motor 33, respectively, for transmitting the rotational power of the motor 33 to the cam 32, 36 is a conveyance roller, 37 is a paper feed guide, and 38 is a pressure roller, and 39 is a feed roller.

Next, the operation of this embodiment will be explained, and the configuration of this embodiment will be further clarified.

According to such a paper curl correction device, when the power is turned on, the cam 32 moves as shown in FIG.
The stepped portion 32b is initially set to a state in which the switch SW6 is activated. At this time, as described above, the cam 32 is in the shape of an egg, with point f on its circumferential surface 32a abutting the roller 30Q. Now, when the switch SW is actuated by the operator, the cam 32 is rotated clockwise by the angle set in advance by the motor 33 and stored in the control circuit 34, and the point a on the circumferential surface 32a of the cam is rotated. It is brought into contact with a roller 310. As a result, the roller 31C
The cam 320 is biased toward the bell) 301) side compared to when the same surface 32a(1)f was in contact with the switch SW.
The biasing amount SA1 of the roller 30a toward the bell) 301) side corresponding to , is defined.

Further, when the switch SW is operated, the control circuit 3
The cam 32h' is rotated by the angle stored in step 4, and the point b on the circumferential surface 32a of the cam is rotated. J'-Abutted against roller 30C. As a result, the roller 30Q is biased more towards the bell) 30b side than when the point a of the cam 32 was in contact with the roller 30a, which corresponds to the switch SW.
301) side is defined. Similarly,
Switches ew, , sw, , sw.

When the cam 320 is operated, the 0 point of the same surface 32a of the cam 320.

The d point and the 0 point are brought into contact with the row 231Q, respectively, and thereby the biasing amounts 8A, , SA, , SA, corresponding to the switches avr, , sw, , sw, are respectively defined. These biasing amounts SA2. SA2. S.A.
3. SA, , 5A11 is 8 due to the shape of the cam 32.
A, (B A, (SA.

(SA, <5AII. These biasing amounts SA, , S
If A2°SA, , day A, , SA, is set corresponding to the various sheets 40 to be subjected to curl correction, it is possible to apply an appropriate amount of curl correction to each of the various sheets. can be granted.

In the above embodiment, the cam 32 is brought into contact with the roller 30C, but the present invention is not limited to this.
Alternatively, the roller 30c may be supported in a housing separate from the curl correction device, and the cam 32 may be brought into contact with the housing.In short, the cam 32 allows the row 2300 to freely rotate and move up and down. The cam 32 and roller 300 may be configured in such a manner that this is possible.

Further, in the above embodiment, the cam 32 has a circumference ffi 3
2a is formed so that its curvature gradually decreases, but in the present invention, the shape of the curved surface of the cam is not particularly limited, and the point is that by rotating the cam by a set angle, the set angle can be changed. 30G roller bell)
It is sufficient to form the curve of the trap cam so as to obtain the biasing amount to 30.111.

〔Effect of the invention〕

As explained above, the paper curl correction device of the present invention rotates a cam by a set angle using a motor, and rotates a roller installed in a paper conveyance path facing a belt by an amount corresponding to the set angle. Since it is biased, it is possible to easily apply an appropriate amount of curl correction to various types of paper.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing a copying machine equipped with a conventional paper curl correction device, and FIGS. is a conceptual diagram thereof, and FIG. 3 is a block diagram showing the drive system of the motor. 30b...Belt, 30C...Roller, 31...
Paper conveyance path, 32... cam, 33... motor, 40
...Paper.

Claims (2)

[Claims] (1) By installing a belt and rollers facing each other on the paper conveyance path, the rollers are urged on the belt to bend the belt, and the paper is passed between the belt and the rollers. In the paper curl correction device for correcting the curl of the paper, a cam is installed in relation to the roller, a motor for rotating the cam is installed, and the cam is rotated by a set angle by the motor. A paper curl correction device characterized in that the amount of biasing of the roller toward the belt is determined by moving the roller, thereby controlling the amount of curl correction of the paper. (2) The cam is formed so that the curvature of its curved surface gradually decreases.
) Tabashima's 'I −+V/hfl'LK L.