JPH09110253A - Rolled recording paper supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolled-recording paper supply device which can prevent a recess from being formed on recording paper and by which an abnormal image is not generated. SOLUTION: In a rolled-recording paper supply device having a delivery roller 13 to deliver rolled recording paper 11, a frictional force applying means 20 to apply frictional resistance to the recording paper 1 delivered by the delivery roller 13, a correscting means 15 which is arranged on the upstream side of the carrying direction of the recording paper 11 more than the delivery roller 13 and corrects a winding habit of the recording paper 11 and a cutting means 16 to cut the recording paper 11 in a prescribed length, carrying speed of the recording paper 11 is made slow until the recording paper 11 receives stress by the correcting means 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped recording paper supply device applied to a copying machine, a printer, a facsimile machine and the like.

[0002]

2. Description of the Related Art As a paper feeding device in a printer or a facsimile machine, a conveyance roller for feeding a roll of recording paper while feeding it, and a frictional force applying means for giving a frictional resistance to the recording paper fed by the conveyance roller. It is well known to have a correction means for correcting the curl of the recording paper and a cutting means for cutting the recording paper into a predetermined length corresponding to the original.

The use of the roll-shaped recording paper in this manner prevents unnecessary blank portions from being generated on the recording paper when a document of an irregular size is received, and recording provided in the apparatus. This is to prevent the recording paper from being divided when a document longer than the paper is received.

In order to correct the curl which occurs on the roll-shaped recording paper, a decal roller is brought into contact with the recording paper so as to bend the recording paper in a direction opposite to the curl of the recording paper, and a predetermined amount is conveyed by a conveying roller. This is performed by feeding the recording paper while applying tension. If the recording paper is left in contact with the decal roller while the device is on standby, a new curl occurs in the opposite direction to that when the recording paper is wound in a roll. In order to prevent the occurrence of habit, the decurling roller is provided with a moving unit that moves the decurling roller to a position away from the recording paper while the apparatus is on standby.

In the above-mentioned paper feeding device, when the recording paper is straightened, the conveying roller is reversed to form slack on the recording paper, and then the decurling roller is moved by the moving means. This is to reliably move the decal roller to a predetermined position with a slight force.

Further, as a correction means for correcting the curl of the recording paper, Japanese Patent Laid-Open No. 147549/1990 and Japanese Patent Laid-Open No. 4-3 / 1999 are available.
It is also introduced in Japanese Patent No. 03351.

[0007]

In the above technique, when the recording paper is conveyed at a very high linear velocity from the state where the slack is formed on the recording paper, the recording paper collides with the decal roller when the slack disappears. However, there is a problem that the recording paper has a dent. When the recording paper on which the dents are formed is used for image formation, there is a problem that an abnormal image with uneven density occurs.

Therefore, it is an object of the present invention to provide a roll-shaped recording paper feeding apparatus which can prevent the formation of dents on the recording paper and which does not cause an abnormal image.

[0009]

According to the first aspect of the present invention,
Conveying means for feeding the recording paper wound in a roll shape, frictional force applying means for imparting frictional resistance to the recording paper fed out by the conveying means, and arranged upstream of the conveying means in the conveying direction of the recording paper. In a roll-shaped recording paper supply device having a correction means for correcting the curl of the recording paper and a cutting means for cutting the recording paper into a predetermined length, until the recording paper receives stress by the correction means. During this period, the conveyance speed of the recording paper is slowed down.

According to a second aspect of the present invention, there is provided a conveying means for feeding the recording paper wound in a roll shape, a frictional force imparting means for imparting a frictional resistance to the recording paper fed by the conveying means, and the conveying means. In a roll-shaped recording paper supply device having a correction means arranged on the upstream side in the transport direction of the recording paper to correct the curl of the recording paper, and a cutting means for cutting the recording paper into a predetermined length, It is characterized in that the conveying speed of the recording paper is 70 mm / sec or less until the recording paper is stressed by the correcting means.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 indicates a roll-shaped recording paper supply device applied to a facsimile machine, and reference numeral 11 indicates a recording paper wound in a roll shape.

The roll-shaped recording paper feeding device 10 is provided with the recording paper 1
1, a roll holder 12 that supports the recording paper 1 so that the recording paper 1 can be fed out, a feeding roller 13 that is a conveying unit that feeds the recording paper 11 from the roll holder 12, and the recording paper 1 on the feeding roller 13.
1, a pressing roller 14 pressed against the sheet 1, a correction unit 15 arranged upstream of the feeding roller 13 in the conveying direction of the recording paper 11 and correcting the curl of the recording paper 11, and the recording paper 11
And a cutting means 16 for cutting the
Transport roller 17 disposed on the downstream side of the recording paper 11 in the transport direction, a deceleration roller 18 disposed on the downstream side of the transport roller 17 and forming slack on the recording paper 11, and a deceleration roller 1.
8 is arranged on the downstream side, and mainly includes a feed roller 19 that feeds the recording paper 11 to the facsimile apparatus.

The recording paper 11 is formed by being wound around a roll core 11a, and the roll core 11a has a frictional force imparting means 20 for imparting a frictional resistance to prevent the recording paper 11 from being unintentionally fed out. Is provided. The frictional force imparting means 20 includes a friction member 21 that is in contact with the roll core 11a,
Spring 2 for biasing friction member 21 toward roll core 11a
Consists of two.

The pressure roller 14 has its shaft 14a rotatably supported by an arm 22, and the arm 22 has a shaft 23 rotatably supported by a side plate (not shown) of the roll-shaped recording paper feeding device 10. It is fixed to. When the recording paper 11 is replaced or a jam occurs, the pressure roller 14 swings around the shaft 23 to an open position indicated by an imaginary line in the figure to release the pressure.

As shown in FIG. 2, the correction means 15 includes a decurling roller 33 for bending the recording paper 11 in a direction opposite to the winding direction of the recording paper 11, and a pair of arms rotatably supporting a shaft 33a of the decurling roller 33. 34, a support shaft 35 that oscillates the arm 34, and a correction position (shown by a solid line in FIG. 1) for correcting the curl by contacting the decal roller 33 with the recording paper 11 by swinging the arm 34. , Recording paper 11
And a decal solenoid 32 that selectively swings to a standby position (shown by an imaginary line in FIG. 1) separated from.

The support shaft 35 is fixed to a side plate (not shown) of the apparatus, and springs 36 are loosely fitted to both ends of the support shaft 35, respectively. One end 36 of each spring 36
The a is locked to the pins 37 which are respectively planted at both ends of the support shaft 35, and the other end 36b is extended along the lower surface of the arm 34 to support the arm 34 by the elastic force.

By swinging the decal roller 33 to the standby position separated from the recording paper 11, it is possible to prevent the curl from being generated again in the direction opposite to the winding direction of the recording paper 11 during the standby.

The cutting means 16 is arranged on the downstream side of the feeding roller 13 and has a fixed blade 16a which also serves as a guide plate for guiding the lower surface of the recording paper 11 and a rotation which moves while rotating in the width direction of the recording paper 11. It consists of a blade 16b. Rotary blade 1
6b is rotationally driven by a cutter motor 29. The cutting means 16 may be a guillotine type having a movable blade and a fixed blade.

The rotation of the carry motor M for rotating the carry roller 17 is transmitted to the shaft 17a of the carry roller 17, and the carrying speed of the recording paper 11 in the normal state is set to 200 mm / sec. ing. The rotation of the carry motor M is transmitted to the delivery roller 13, the deceleration roller 18, and the delivery roller 19 via gears, belts, and the like (not shown). The deceleration roller 18 is also provided with an electromagnetic clutch via a torque limiter (not shown).

When the length of the recording paper 11 exceeds a certain length, the leading end of the recording paper 11 reaches the recording portion of the main body of the facsimile apparatus. Therefore, the transport motor M should be stopped to cut the recording paper 11. I can't. Therefore, in this example, the linear velocity of the deceleration roller 18 is set to be slower than the linear velocity of the transport roller 17 and the delivery roller 19 so that the transfer paper 11 is loosened between the transport roller 17 and the deceleration roller 18. ing. The amount of slack is set to be larger than the amount of recording paper 11 conveyed by the recording unit between the stop of the conveyance motor M and the end of cutting of the recording paper 11.

A jam sensor 28 for detecting the occurrence of a jam on the recording paper 11 is arranged in the conveying path of the recording paper 11 between the conveying roller 17 and the deceleration roller 18. The recording paper 1 is provided between the feeding roller 13 and the fixed blade 16a.
A recording paper sensor 31 for detecting the loss of 1 is arranged. Each of these sensors 28 and 31 is connected to a control means 30 described later.

On the guide plate 24, sandwiching the conveyance path of the recording paper 11 between the conveyance roller 17 and the deceleration roller 18 up and down,
A lower guide plate 25 is arranged. The guide plate 24 is
The recording paper 11 can be opened and closed in order to facilitate the jam processing when a jam occurs.

On the other hand, the lower guide plate 25 is formed on the lower guide plate 25 in order to form the slack in the recording paper 11 as described above.
1 is connected to a closed position shown in FIG. 1 and an open position shown by an imaginary line in FIG. The guide plate solenoid 27 is connected to the lower surface of the lower guide plate 25 via a spring 26.

As shown in FIG. 3, the control means 30 is a ROM
The main part is configured by a well-known microcomputer having a RAM and a RAM, and at the input end of an I / O port (not shown), the jam information of the recording paper 11 and the recording paper 11 are detected by the jam sensor 28 and the recording paper sensor 31. The signal of the presence / absence information is input. I / O (not shown) of the control means 30
From the output end of the port, drive signals are output to the carry motor M, the cutter motor 29, the guide plate solenoid 27, and the decal solenoid 32 at appropriate times according to the time chart shown in FIG.

When outputting the received image information, the feeding roller 13 is reversed to pull back the recording paper 11 to the upstream side by several mm to roll the roll holder 12 and the feeding roller 13.
After the slack is formed on the recording paper 11 between and, the decal solenoid 32 is excited to swing the decal roller 33 to a predetermined correction position.

This means that, depending on the type of the recording paper 11, the decal roller 33 does not reach the predetermined position due to the stiffness of the recording paper 11, the curl cannot be corrected sufficiently, and the front and rear ends of the recording paper 11 are not corrected. To prevent missing images,
This helps prevent an increase in the current of the decal solenoid 32 that occurs when the decal roller 33 is moved to a predetermined position.

From the state where the slack is formed on the recording paper 11,
When the recording paper 11 is conveyed at a very high linear velocity, the recording paper 11 collides with the decurling roller 33 when the slack disappears, and the recording paper 11 is dented. Therefore, in order to prevent this, the recording paper 11 is bent, the decal solenoid 32 is excited, and the recording paper 1 is fed by the feeding roller 13 until the stress is applied by the decal roller 33.
The transport speed of 1 is set to be slower than the normal time. The inventor conducted an experiment using general recording paper, and found that 70
mm / sec or less was desired.

The operation of the apparatus having the above-mentioned configuration will be described below with reference to FIG.
This will be described with reference to the time chart shown in FIG. When the power supply 37 (see FIG. 3) of the apparatus main body is turned on, the control means 30 checks each function and sets an initial function such as an initial value set. Subsequent to this operation, the control means 30 takes in the information regarding the presence / absence of the recording paper 11 by the recording paper sensor 31, and enters the incoming call waiting state.

The image information received is temporarily stored in the memory section of the main body of the apparatus, and when this image information is output, the feeding roller 13 is rotated in the reverse direction by the conveyance motor M to move the recording paper 11 to the upstream side by several mm. Pull back to roll holder 12
Slack is formed on the recording paper 11 between the feeding roller 13 and the feeding roller 13. After the time T1, the decal solenoid 32 is excited to move the arm 34 to the spring 3 about the support shaft 35.
It swings against the urging force of 6, and swings the decal roller 33 to a predetermined correction position.

Thereafter, the recording paper 11 is placed on the decal roller 33.
And the predetermined tension is applied to the recording paper 11, the conveyance motor M conveys the recording paper 11 at a low speed of 70 mm / sec or less. When a predetermined tension is applied to the recording paper 11, the conveyance motor M moves at a high speed of 200 mm / s.
The recording paper 11 is conveyed at a speed of ec. The recording paper 11 is curved in the direction opposite to the curl direction while being in contact with the decal roller 33, the curl is corrected, and the recording paper 11 is conveyed to the downstream side.

At the same time when the jam of the recording paper 11 is detected by the jam sensor 28, the guide plate solenoid 27 is excited and the lower guide plate 25 is swung to the open position.
A slack is formed on the recording paper 11 between the sheet 8 and the conveyance roller 17. When the leading edge of the recording paper 11 reaches the delivery roller 19, the deceleration roller 18 rotates with the recording paper 11 at the conveyance speed of the delivery paper 19 by the delivery roller 19 and reduces the above-mentioned slack. When the leading edge of the recording paper 11 is detected by the registration sensor 38 of the apparatus main body, the paper feeding motor 39 of the apparatus main body operates to convey the recording paper 11 to the recording unit.

When the recording paper 11 having a length corresponding to the image information is conveyed, the conveying motor M stops and the cutter motor 29
Is operated to cut the recording paper 11 between the rotary blade 16b and the fixed blade 16a. After a lapse of time T2 from the cutting of the recording paper 11, the decal solenoid 32 is demagnetized, and the arm 34 is oscillated by the urging force of the spring 36 about the support shaft 35 to oscillate to a standby position separated from the recording paper 11.

At the same time when the jam sensor 28 no longer detects the jam of the recording paper 11, the guide plate solenoid 27 is demagnetized and the lower guide plate 25 is swung to the closed position. An image is formed on the recording paper 11 conveyed to the recording unit of the apparatus main body. After that, when the registration sensor 38 no longer detects the recording paper 11, the paper feed motor 39 stops after the time T3.

[0034]

According to the present invention, the conveying speed of the recording paper is slowed until the recording paper wound in a roll is fed out and stressed by the correcting means for correcting the curl of the recording paper. The recording paper slowly contacts the correction means, and damage caused by the correction means to the recording paper can be minimized, and an abnormal image due to the damage can be suppressed to a minimum.

[Brief description of the drawings]

FIG. 1 is a front view of a roll-shaped recording paper feeding device showing an embodiment of the present invention.

2 is a perspective view of the correction means shown in FIG. 1. FIG.

FIG. 3 is a block diagram of the roll-shaped recording paper supply device shown in FIG.

FIG. 4 is a time chart of the roll-shaped recording paper supply device shown in FIG.

[Explanation of symbols]

 11 Recording Paper 12 Roll Holder 13 Feeding Roller 14 Pressing Roller 15 Decal Roller 16 Cutting Means 16a Fixed Blade 16b Rotating Blade 17 Conveying Roller 18 Decelerating Roller 19 Sending Roller 20 Friction Force Applying Means 21 Friction Member 22 Arm 23 Shaft 24 On Guide Plate 25 Lower Guide Plate 26 Spring 27 Guide Plate Solenoid 28 Jam Sensor 29 Cutter Motor 30 Control Means 31 Recording Paper Sensor 32 Decal Solenoid 33 Decal Roller 34 Arm 35 Spindle 36 Spring

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location H04N 1/00 108 H04N 1/00 108Q

Claims (2)

[Claims] 1. A conveyance means for feeding a roll of recording paper, a frictional force imparting means for imparting a frictional resistance to the recording paper fed out by the conveyance means, and a conveying direction of the recording paper rather than the conveying means. In a roll-shaped recording paper feeding device having a correcting means arranged upstream of the recording paper for correcting the curl of the recording paper and a cutting means for cutting the recording paper into a predetermined length. A roll-shaped recording paper feeding device, characterized in that the conveying speed of the recording paper is slowed until it is stressed by. 2. A conveying means for feeding a recording paper wound in a roll shape, a frictional force imparting means for imparting a frictional resistance to the recording paper fed out by the conveying means, and a conveying direction of the recording paper rather than the conveying means. In a roll-shaped recording paper feeding device having a correcting means arranged upstream of the recording paper for correcting the curl of the recording paper and a cutting means for cutting the recording paper into a predetermined length. A roll-shaped recording paper feeding device, characterized in that the conveying speed of the recording paper is 70 mm / sec or less until it is subjected to stress by