JP2006240773A - Roll paper delivery device, and roll paper delivery method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine a tip position of roll paper with high precision, and stably achieve automatic loading without being affected by folding marks in the outer circumference of a roll, loosening when it is set, and thickness of the roll paper. <P>SOLUTION: This roll paper delivery device is provided with a drive roller 11 and a driven roller 12 to rotatably support the roll paper P, a torque limiter 22 to brake rotation of the driven roller 12 at prescribed torque, and an encoder 23 to detect the rotation of the driven roller 12. In automatic loading, the drive roller 11 is driven in the direction of the roll paper take-up direction b, while monitoring rotation of the driven roller 12. When the rotation of the driven roller 12 is stopped, it is determined that the roll paper tip Pa reaches between the driven roller 12 and the drive roller 11. Then the drive roller 11 is driven in the roll paper delivery direction 1, and the roll paper tip Pa is delivered toward a separator 17. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a roll paper feeding device provided in a roll paper use device such as a printer, a facsimile machine, an ATM, a POS terminal, and a ticket vending machine, and in particular, the front end of the roll paper stored in a storage unit is automatically set to a paper conveyance path. The present invention relates to a roll paper feeding device provided with an auto-loading function and a roll paper feeding method.

  2. Description of the Related Art There is known a roll paper feeding device having an autoloading function that automatically feeds the leading end of roll paper stored in a storage unit to a paper conveyance path (see, for example, Patent Documents 1 to 5). As this type of roll paper feeding device, there are an apparatus that detects the leading edge of the roll paper when the roll paper is automatically loaded, and an apparatus that automatically loads the roll paper without detecting the leading edge of the roll paper.

FIG. 11 is a side view of a roll paper feeding device according to a conventional example.
The roll paper feeding device shown in this figure is for automatically loading roll paper without detecting the leading edge of the roll paper, and includes a driving roller 101, a driven roller 102, a conveying roller 103, a clamp roller 104, a timing belt 105, A motor 106, a separator 107, a conveyance guide 108, a conveyance sensor 109, and the like are provided.

  The driving roller 101 and the driven roller 102 are arranged in parallel at a predetermined interval on the bottom of the storage unit, and rotatably support the roll paper P stored in the storage unit. The driving roller 101 and the conveying roller 103 are interlocked via a timing belt 105 and are driven by a motor 106. The separator 107 is disposed between the driving roller 101 and the driven roller 102, and separates the roll paper leading end Pa and guides it to the paper conveyance path between the conveyance guides 108. The conveyance roller 103 and the clamp roller 104 are arranged with the paper conveyance path interposed therebetween, and nip and convey the roll paper P fed to the paper conveyance path. Further, the transport sensor 109 detects the roll paper P in the paper transport path.

  When auto-loading is performed with the roll paper feeding device configured as described above, as shown in FIG. 11, the driving roller 101 is driven in the normal rotation direction (roll paper feeding direction) a, and the roll paper P is fed out. Rotate to A. When the leading edge position of the roll paper P reaches the separator 107, the roll paper leading edge Pa separated by the separator 107 is guided to the paper conveyance path, and the autoloading is completed.

  However, in such a roll paper feeding device, the roll paper P is rotated in the feeding direction A when the roll paper leading edge Pa is automatically loaded, so that the roll paper leading edge Pa is easily caught around. Further, since the roll paper P is likely to be slack, it is necessary to drive the drive roller 101 in the roll paper winding direction after auto-loading to remove the slack of the roll paper P.

On the other hand, as shown in Patent Documents 1 to 4, in the roll paper feeding device provided with the leading edge detection means, the leading edge of the roll paper is detected by detecting the leading edge position of the roll paper while driving the drive roller in the roll paper winding direction. After reaching between the roller and the driving roller, the driving roller can be driven in the roll paper feeding direction to feed the leading edge of the roll paper toward the separator. Accordingly, when the roll paper tip is automatically loaded, the roll paper tip does not get caught in the surroundings, and the roll paper is less likely to be loosened.
JP 05-246610 A Japanese Patent Laid-Open No. 06-336061 Japanese Patent Laid-Open No. 08-133534 JP-A-11-217139 Japanese Patent Application Laid-Open No. 07-117920

  However, since the leading edge detection means described in Patent Documents 1 to 4 directly detect the bulge H or level difference of the roll paper using an optical sensor or a microswitch, the roll paper outer periphery folds, slack when set, roll paper Depending on the thickness of the paper, the leading edge of the roll paper may be erroneously detected.

  Patent Document 5 discloses a driven roller having a torque limiter (driven roller braking means) and an encoder (driven roller rotation detecting means). The driven roller is a roll for loading roll paper for replenishment. The paper replenishing unit is used for determining the roll paper loading direction, and does not indicate that it is used for determining the leading edge position of the roll paper when the roll paper leading edge is automatically loaded.

  The present invention is considered in view of the above circumstances, and determines the leading edge position of the roll paper with high accuracy without being affected by folds on the outer periphery of the roll paper, slackness during setting, the thickness of the roll paper, and the like. An object of the present invention is to provide a roll paper feeding device and a roll paper feeding method that can perform stable autoloading.

  In order to achieve the above object, a roll paper feeding device of the present invention is a roll paper feeding device that feeds roll paper stored in a storage unit to a paper conveyance path, and is parallel to the bottom of the storage unit with a predetermined interval. And a drive roller and a driven roller that rotatably support the roll paper stored in the storage unit, and is arranged between the drive roller and the driven roller to separate the leading end of the roll paper and to feed the paper A separator that guides the rotation of the driven roller with a predetermined torque, driven roller rotation detecting means for detecting the rotation of the driven roller, and the drive roller in the roll paper feeding direction and the roll paper winding. A controller that controls driving in the direction, and the controller monitors the rotation of the driven roller while driving the driving roller in the roll paper winding direction. A leading edge position determining means for determining that the leading edge of the roll paper has reached between the driven roller and the driving roller when the rotation of the driven roller is stopped; and a leading edge position of the roll paper between the driven roller and the driving roller. After reaching, the driving roller is driven in the roll paper feeding direction, and a leading edge feeding control means for feeding the leading edge of the roll paper toward the separator is provided.

  With this configuration, the leading edge position of the roll paper can be determined based on the detection of the rotation of the driven roller, so that it is not affected by folds on the outer periphery of the roll paper, looseness during setting, the thickness of the roll paper, and the like. It is possible to determine the leading edge position of the roll paper with high accuracy and perform stable autoloading.

In the roll paper feeding device of the present invention, the braking torque of the driven roller braking means is T, the load of the roll paper received by the driven roller is F1, the friction coefficient between the driven roller and the roll paper is μ1, and the driving roller is When the load of the roll paper to be received is F2 and the friction coefficient between the roll papers is μ2, F1μ1>T> F2μ2 is established.
With this configuration, when the leading edge of the roll paper reaches between the driven roller and the driving roller, the rotation of the roll paper is reliably stopped by the braking force of the driven roller, and the leading edge position of the roll paper is accurately determined. be able to.

In the roll paper feeding device of the present invention, the driven roller braking means automatically adjusts the braking torque according to the roll diameter of the roll paper.
With this configuration, the rotation of the driven roller is braked with an appropriate torque according to the roll diameter, so the roll paper tip position can be accurately determined even when a roll paper with a small roll diameter is used. And stable autoloading can be performed.

Further, in the roll paper feeding device of the present invention, the driven roller braking means is provided at the tip of the arm, an adjustable torque limiter that varies the braking torque according to the angle of the arm, and is provided on the outer peripheral surface of the roll paper. The roller includes abutting rollers and a spring that biases the arm toward the roll paper.
If comprised in this way, the automatic adjustment of the braking torque according to a roll diameter can be performed mechanically. This makes it possible to perform stable autoloading that is not affected by the roll diameter while reducing the processing load on the control unit.

  Further, the roll paper feeding method of the present invention is a roll paper feeding method for feeding the roll paper stored in the storage unit to the paper conveyance path, and is arranged in parallel at a predetermined interval at the bottom of the storage unit. A driving roller and a driven roller that rotatably support the roll paper stored in the storage unit; and a separator that is disposed between the driving roller and the driven roller and separates the leading end of the roll paper and guides it to the paper conveyance path. A driven roller braking means for braking the rotation of the driven roller with a predetermined torque; a driven roller rotation detecting means for detecting the rotation of the driven roller; and driving control of the drive roller in the roll paper feeding direction and the roll paper winding direction. The rotation of the driven roller is monitored while the drive roller is driven in the roll paper winding direction, and the rotation of the driven roller is stopped. It is determined that the leading edge of the roll paper has reached between the driven roller and the driving roller, and after the leading edge of the roll paper has reached between the driven roller and the driving roller, the driving roller is moved in the roll paper feeding direction. It is a method of driving and feeding the leading edge of the roll paper toward the separator.

  According to such a method, the leading edge of the roll paper due to folds on the outer periphery of the roll paper, slack at the time of setting, the thickness of the roll paper, etc. is determined by determining the leading edge position of the roll paper based on detection of the rotation of the driven roller. Misdetection of the position can be prevented. As a result, the leading edge position of the roll paper can be determined with high accuracy, and stable autoloading can always be performed.

In the roll paper feeding method of the present invention, the braking torque of the driven roller braking means is T, the load of the roll paper received by the driven roller is F1, the friction coefficient between the driven roller and the roll paper is μ1, and the driving roller is Assuming that the load of the roll paper to be received is F2 and the friction coefficient between the roll papers is μ2, F1μ1>T> F2μ2 is established.
With this method, when the leading edge of the roll paper reaches between the driven roller and the driving roller, the roll paper rotation is reliably stopped by the braking force of the driven roller, and the leading edge position of the roll paper is accurately determined. can do.

The roll paper feeding method of the present invention is a method in which the driven roller braking means automatically adjusts the braking torque in accordance with the roll diameter of the roll paper.
If this method is used, the rotation of the driven roller is braked with an appropriate torque according to the roll diameter. Therefore, even when a roll paper with a small roll diameter is used, the roll paper tip position can be accurately set. Judgment and stable autoloading can be performed.

  As described above, according to the present invention, the leading edge position of the roll paper can be determined based on the detection of the rotation of the driven roller, which affects the folds on the outer periphery of the roll paper, slackness during setting, the thickness of the roll paper, and the like. Therefore, it is possible to determine the leading end position of the roll paper with high accuracy and perform stable autoloading.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
First, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a side view of a roll paper feeding device according to a first embodiment of the present invention.
As shown in this figure, the roll paper feeding device of the first embodiment includes a drive roller 11, a driven roller 12, a conveyance roller 13, a clamp roller 14, a timing belt 15, a motor 16, a separator 17, a conveyance guide 18, and a conveyance sensor. 19 etc. are comprised.

  The driving roller 11 and the driven roller 12 are arranged in parallel at a predetermined interval at the bottom of the storage unit, and rotatably support the roll paper P stored in the storage unit. The driving roller 11 and the conveying roller 13 are interlocked via a timing belt 15 and are driven by a motor 16. The separator 17 is disposed between the driving roller 11 and the driven roller 12, separates the roll paper leading edge Pa, and guides it to the paper conveyance path between the conveyance guides 18. The conveyance roller 13 and the clamp roller 14 are arranged with the paper conveyance path interposed therebetween, and nip and convey the roll paper P fed to the paper conveyance path. The conveyance sensor 19 detects the roll paper P in the paper conveyance path.

FIG. 2 is a plan view of the roll paper feeding device according to the first embodiment of the present invention.
As shown in this figure, the driving roller 11 and the driven roller 12 are held between a pair of frames 21 like the separator 17 and the roll paper guide 20. One end of the shaft portion of the driven roller 12 is provided with a torque limiter (driven roller braking means) 22 whose rotation is restricted by the frame 21, and the rotation of the driven roller 12 is braked by the torque limiter 22. The load torque (braking torque) T of the torque limiter 22 is F1 as the load of the roll paper P received by the driven roller 12, μ1 as the friction coefficient between the driven roller 12 and the roll paper P, and the load of the roll paper P as received by the drive roller 11. When the friction coefficient between F2 and the roll paper P is μ2,
F1μ1>T> F2μ2
Is set to hold.

  An encoder (driven roller rotation detecting means) 23 for detecting the rotation of the driven roller 12 is provided at the other end of the shaft portion of the driven roller 12. The encoder 23 includes, for example, a disk 23a in which a plurality of slits are formed at predetermined intervals in the circumferential direction, and a transmissive optical sensor 23b that detects the slits of the disk 23a. , And input to the control unit 24 that controls the drive of the motor 16.

Next, an autoload operation of the roll paper feeding device according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a block diagram illustrating a control configuration of the roll paper feeding device according to the first embodiment of the present invention, and FIG. 4 is a flowchart illustrating an autoload processing procedure of the roll paper feeding device according to the first embodiment of the present invention. FIG. 5 is an explanatory view showing an autoload start state of the roll paper feeding device according to the first embodiment of the present invention, and FIG. 6 is a front end position determination state of the roll paper feeding device according to the first embodiment of the present invention. FIG. 7 is an explanatory view showing the leading-out state of the roll paper feeding device according to the first embodiment of the present invention.

  As shown in FIGS. 3 and 4, the auto-loading operation of the roll paper feeding device is performed in a predetermined procedure by the control unit 24 executing an auto-loading process routine. Based on the opening and closing, the setting of the roll paper P is detected, and the autoload processing routine is executed. In the autoload processing routine, first, the drive roller 11 is driven in the roll paper winding direction b by reverse driving of the motor 16 (see S101 in FIG. 4 and FIG. 5). Thereby, since the roll paper P rotates in the winding direction B, the roll paper front end Pa can be smoothly rotated without being caught by the step of the roll paper guide 20 or the like.

As shown in FIG. 5, when the roll paper tip Pa is not between the drive roller 11 and the driven roller 12, the driven roller 12 rotates while applying a braking force of torque T by friction with the roll paper P. As shown in FIG. 6, when the roll paper front end Pa reaches between the driving roller 11 and the driven roller 12, the outer sheet of the roll paper P is peeled off by the torque T of the torque limiter 22, and a bulge H is generated. At this time, the driving roller 11 continues to rotate in the roll paper winding direction b, but the driven roller 12 is stopped by the torque T of the torque limiter 22. Then, by detecting this with the encoder 23 (S102 in FIG. 4: leading edge position determining means), it is possible to determine that the roll paper leading edge Pa has reached between the driven roller 12 and the driving roller 11.
When the motor 16 is driven in reverse rotation, the timer t1 is set (S103 in FIG. 4), and if the driven roller 12 does not stop even after the timer t1 has elapsed (S104 in FIG. 4), predetermined error processing is performed. Preferably, this is performed (S105 in FIG. 4).

  After detecting the rotation stop of the driven roller 12, the motor 16 continues to be driven in reverse until the roll paper leading edge Pa passes through the separator 17, and then the motor drive is stopped (S106 in FIG. 4). Next, as shown in FIG. 7, the driving roller 11 is rotated in the roll paper feeding direction a by forward rotation driving of the motor 16 (S107 in FIG. 4: leading edge feeding control means). Thereby, the roll paper leading edge Pa is separated by the separator 17 and fed out to the paper conveyance path in the conveyance guide 18. At this time, the braking force of torque T is applied to the driven roller 12 by the torque limiter 22, and the driven roller 12 does not rotate until the bulge H generated in FIG. 6 is eliminated. Can be auto-loaded.

After the motor 16 is driven to rotate forward, the success of autoloading is confirmed by the transport sensor 19 (S108 in FIG. 4), and the driving of the motor 16 is stopped (S109). Thereby, the autoload process ends.
When the motor 16 is driven forward, the timer t2 is set (S110 in FIG. 4), and when the transport sensor 19 does not detect the roll paper leading edge Pa even after the timer t2 has elapsed (S111 in FIG. 4). It is preferable to perform predetermined error processing (S112 in FIG. 4).
Further, at the end of autoloading, the conveyance of the roll paper P may be continued without stopping the motor 16, and printing may be performed by a downstream printing mechanism (not shown).

  According to the roll paper feeding device of the first embodiment configured as described above, the roll paper P stored in the storage unit is rotatably supported by being arranged in parallel at a predetermined interval at the bottom of the storage unit. The driving roller 11 and the driven roller 12, the separator 17 disposed between the driving roller 11 and the driven roller 12, separating the roll paper leading end Pa and guiding it to the paper conveyance path, and the rotation of the driven roller 12 are braked with a predetermined torque. A torque limiter 22 for detecting the rotation of the driven roller 12, and a controller 24 for controlling the driving roller 11 in the roll paper feeding direction a and the roll paper winding direction b. Then, the control unit 24 monitors the rotation of the driven roller 12 while driving the driving roller 11 in the roll paper winding direction b, and when the rotation of the driven roller 12 stops, the roll paper front end Pa drives the driven roller 12. After determining that the roller 11 has reached between the rollers 11, and further, after the roll paper leading edge Pa has reached between the driven roller 12 and the driving roller 11, the driving roller 11 is driven in the roll paper feeding direction a to Pa is fed out toward the separator 17. That is, the roll paper feeding device according to the first embodiment determines the leading edge position of the roll paper P based on the detection of the rotation of the driven roller 12, so Without being affected by the thickness of the paper P, the leading end position of the roll paper P can be determined with high accuracy and stable autoloading can be performed.

In the roll paper feeding device of the first embodiment, the braking torque of the torque limiter 22 is T, the load of the roll paper P received by the driven roller 12 is F1, the friction coefficient between the driven roller 12 and the roll paper P is μ1, and the driving roller 11 when the load of the roll paper P received by F11 is F2, and the friction coefficient between the roll papers P is μ2.
F1μ1>T> F2μ2
Therefore, when the roll paper leading edge Pa reaches between the driven roller 12 and the driving roller 11, the rotation of the roll paper P is surely stopped by the braking force of the driven roller 12, and the leading edge of the roll paper P is The position can be determined with high accuracy.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. However, about the same structure as 1st embodiment, the same code | symbol as 1st embodiment is attached | subjected and description of 1st embodiment is used.

FIG. 8 is a side view of the roll paper feeding device according to the second embodiment of the present invention, FIG. 9 is a plan view of the roll paper feeding device according to the second embodiment of the present invention, and FIG. It is operation | movement explanatory drawing of the roll paper supply apparatus which concerns on 2nd embodiment.
As shown in these drawings, the basic configuration of the roll paper feeding device of the second embodiment is substantially the same as the roll paper feeding device of the first embodiment, but according to the roll diameter of the roll paper P, The point which adjusts automatically the braking torque of the driven roller 12 is different from 1st embodiment.

  As shown in FIGS. 8 and 9, the roll paper feeding device of the second embodiment includes an adjustable torque limiter 25 at one end of the shaft portion of the driven roller 12. In the adjustable torque limiter 25, the torques T1 to T2 can be varied according to the angle of the arm 26. A roller 27 that can rotate without load is held at the tip of the arm 26, and the roller 27 is brought into contact with the outer peripheral surface of the roll paper P by the biasing force of a spring 28 that biases the arm 26. As a result, the angle of the arm 26 changes according to the roll diameter of the roll paper P, and the torque of the adjustable torque limiter 25 is automatically adjusted.

As shown in FIG. 8, when the roll diameter of the roll paper P is large, the load of the torque T <b> 1 is applied to the driven roller 12 by the adjustable torque limiter 25. Since the torque T1 at this time is the same as the torque T described in the first embodiment, the roll paper P can be automatically loaded without any problem.
On the other hand, as shown in FIG. 10, when the roll diameter of the roll paper P is small, the torque of the adjustable torque limiter 25 is adjusted to T2 by the change in the angle of the arm 26. This torque T2 is F1p for the load of the roll paper P received by the driven roller 12, μ1 for the friction coefficient between the roll paper P and the driven roller 12, F2p for the load of the roll paper P received by the driving roller 11, and the friction between the roll papers P. When the coefficient is μ2,
F1pμ1>T2> F2pμ2
Is set to hold. Thereby, irrespective of the roll diameter of the roll paper P, the torques T1 to T2 of the adjustable torque limiter 25 can be optimized, and as a result, the roll paper tip position can be accurately determined and stable autoloading can be performed. .

  According to the roll paper feeding device of the second embodiment configured as described above, the braking torque of the driven roller 12 is automatically adjusted according to the roll diameter of the roll paper P. The rotation of the driven roller 12 can be braked with torque. As a result, even when a roll paper P or the like having a small roll diameter is set, the leading end position of the roll paper P can be accurately determined and stable autoloading can be performed. Can do.

  In the present embodiment, an adjustable torque limiter 25 whose braking torque varies according to the angle of the arm 26, a roller 27 provided at the tip of the arm 26 and abutting on the outer peripheral surface of the roll paper P, and the arm 26 Is provided with the spring 28 that urges the paper toward the roll paper P, so that automatic adjustment of the braking torque according to the roll diameter can be performed mechanically. This makes it possible to perform stable autoloading that is not affected by the roll diameter while reducing the processing load on the control unit 24.

  The present invention is applied to a roll paper feeding device provided in a roll paper using device such as a printer, a facsimile, an ATM, a POS terminal, a ticket vending machine or the like. In particular, the present invention is useful in a roll paper feeding device having an autoloading function that automatically feeds the leading end of the roll paper stored in the storage unit to the paper conveyance path, and the roll paper feeding method.

It is a side view of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is a top view of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is a block diagram which shows the control structure of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is a flowchart which shows the autoload process sequence of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the autoload start state of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the front-end | tip position determination state of the roll paper feeding apparatus which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the front-end | tip extended state of the roll paper supply apparatus which concerns on 1st embodiment of this invention. It is a side view of the roll paper feeding apparatus which concerns on 2nd embodiment of this invention. It is a top view of the roll paper feeding apparatus which concerns on 2nd embodiment of this invention. It is operation | movement explanatory drawing of the roll paper feeding apparatus which concerns on 2nd embodiment of this invention. It is a side view of the roll paper feeding apparatus which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Drive roller 12 Follow roller 13 Conveyance roller 14 Clamp roller 16 Motor 17 Separator 18 Conveyance guide 19 Conveyance sensor 21 Frame 22 Torque limiter 23 Encoder 24 Control part 25 Adjustable torque limiter 26 Arm 27 Roller 28 Spring P Roll paper Pa Roll paper front end

Claims (7)

A roll paper feeding device that feeds roll paper stored in a storage unit to a paper transport path,
A driving roller and a driven roller that are arranged in parallel at a predetermined interval on the bottom of the storage unit, and rotatably support the roll paper stored in the storage unit;
A separator disposed between the driving roller and the driven roller, and separating the leading end of the roll paper and guiding it to the paper conveyance path;
Driven roller braking means for braking the rotation of the driven roller with a predetermined torque;
Driven roller rotation detecting means for detecting rotation of the driven roller;
A controller that controls the drive roller in the roll paper feeding direction and the roll paper winding direction;
The control unit is
While driving the drive roller in the roll paper winding direction, the rotation of the driven roller is monitored, and when the rotation of the driven roller stops, it is determined that the leading edge of the roll paper has reached between the driven roller and the drive roller. Tip position determination means for
And a leading edge feeding control means for driving the driving roller in a roll paper feeding direction after the leading edge of the roll paper reaches between the driven roller and the driving roller, and feeding the leading edge of the roll paper toward the separator. A roll paper feeding device as a feature. The braking torque of the driven roller braking means is T, the load of the roll paper received by the driven roller is F1, the friction coefficient between the driven roller and the roll paper is μ1, the load of the roll paper received by the driving roller is F2, and the roll papers When the coefficient of friction is μ2,
F1μ1>T> F2μ2
The roll paper feeding device according to claim 1, wherein:   The roll paper feeding device according to claim 1 or 2, wherein the driven roller braking means automatically adjusts a braking torque in accordance with a roll diameter of the roll paper. The driven roller braking means is
An adjustable torque limiter whose braking torque varies according to the angle of the arm;
A roller provided at the tip of the arm and abutting against the outer peripheral surface of the roll paper;
The roll paper feeding device according to claim 3, further comprising a spring that biases the arm toward the roll paper. A roll paper feeding method for feeding the roll paper stored in the storage section to a paper transport path,
A driving roller and a driven roller that are arranged in parallel at a predetermined interval on the bottom of the storage unit, and rotatably support the roll paper stored in the storage unit;
A separator disposed between the driving roller and the driven roller, and separating the leading end of the roll paper and guiding it to the paper conveyance path;
Driven roller braking means for braking the rotation of the driven roller with a predetermined torque;
Driven roller rotation detecting means for detecting rotation of the driven roller;
Using a control unit that drives and controls the drive roller in the roll paper feeding direction and the roll paper winding direction,
While driving the drive roller in the roll paper winding direction, the rotation of the driven roller is monitored, and when the rotation of the driven roller stops, it is determined that the leading edge of the roll paper has reached between the driven roller and the drive roller. And
A roll paper feeding method, wherein after the leading edge of the roll paper reaches between the driven roller and the driving roller, the driving roller is driven in the roll paper feeding direction to feed the leading edge of the roll paper toward the separator. . The braking torque of the driven roller braking means is T, the load of the roll paper received by the driven roller is F1, the friction coefficient between the driven roller and the roll paper is μ1, the load of the roll paper received by the driving roller is F2, and the roll papers When the coefficient of friction is μ2,
F1μ1>T> F2μ2
The roll paper feeding method according to claim 5, wherein:   The roll paper feeding method according to claim 5 or 6, wherein the driven roller braking means automatically adjusts the braking torque according to the roll diameter of the roll paper.

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