JPH0873080A - Roll paper sheet feeding device - Google Patents

Abstract

PURPOSE: To speedily carry out the positioning of the top end of each roll paper sheet for which the initial setting for each roll paper sheet on a roll paper sheet feeding device is completed. CONSTITUTION: The roll paper sheets 431 and 432 which are loosened from the first and the second feeding rolls 421 and 422 are driven out by the corresponding feed rollers 441 and 442 , and each top end is detected by the set sensors 461 and 462 arranged in the downstream. In setting, the top ends of the roll paper sheets 431 and 432 are retreated simultaneously, and at the time point after the lapse of a certain time from the time point when the set sensors 461 and 462 are detected, each drive of the feed rollers 441 and 442 is suspended, and each feed roller is set at a waiting position by the parallel processing. When the paper feed is requested, the pertinent roll paper sheet is driven out to a cutter device 47 from a waiting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper feeder used in an image processing apparatus such as a copying machine, a facsimile machine or a printer, and more particularly to a roll paper feeder adapted to supply a plurality of roll papers. Regarding paper equipment.

[0002]

2. Description of the Related Art A certain type of image processing apparatus is equipped with a roll paper feeding device for the purpose of making a long drawing or making a paper feeding mechanism compact and highly reliable. An image is copied or recorded using paper (hereinafter simply referred to as recording).

FIG. 6 is a diagram of Japanese Patent Application Laid-Open No. 62-161669.
The main part of the conventional roll paper feeder disclosed in FIG.
It is a thing. This device has three supply rolls 11₁~ 1
1₃Can be set. First
Supply roll 11₁First roll paper unraveled from
12₁Is the feed roll 13₁And nip roll 14 ₁
And set set at a predetermined interval.
Sensor 15₁And standby position sensor 16₁Pass between So
Then, after that, the transport roll 17₁By the first transport
Road 18₁And the second and third transport paths 18₂,
18₃Reach the confluence of. Just in front of this junction
Is a cutter device 23 including a rotary blade 21 and a fixed blade 22.
Is placed. Second supply roll 11₂Unraveled
Second roll paper 12₂And the third supply roll 11
₃Third roll paper 12 unraveled from₃As well as the first
2 or the third transport path 18₂, 18₃To be transported
become.

A set of such a conventional roll paper feeder is
Will be described. First of all,
3 supply rolls 11₁~ 11₃Put on each. Oh
The roll is the first roll paper 12₁The feed roll 13
₁And nip roll 14₁Set its tip through
Sensor 15₁To detect. This makes the initial state
Feed roll 13 that was in a non-contact state₁When
Nip roll 14₁Is the first roll paper 12₁Sandwich
It The operator does the same for the second and third rolls.
Paper 12₂, 12₃Set sensor 1 that supports the tip of the
5₂, 15₃Of the roll paper
12₂, 12₃The feed roll 13₂, 13 ₃And Ni
Prowl 14₂, 14₃To be clamped by.

After the initial setting as described above, when the operator closes the door of the apparatus and presses a switch (not shown),
First feed roller 13 ₁ is first supply roll 11 ₁ from the first paper roll 12 ₁ is driven is fed, it is conveyed by a predetermined length after passing through the standby position sensor 16 ₁ cutter 23 cut to To do. As a result, the leading edge of the first roll paper 12 ₁ is set. The first roll paper 12 ₁ after cutting is the second and third roll paper 1 after
It is slightly retracted so that it does not get in the way of 2 ₂ and 12 ₃ . Similarly, the leading ends of the _second roll paper 12 ₂ and the third roll paper 12 ₃ are cut in the same manner, and the standby state is set at the positions slightly retracted from the merging point. Thus, the setting of the roll paper feeding device is completed.
In the above description, the leading ends of the roll papers 12 _{1 to} 12 ₃ are cut once, and then the respective roll papers 12 _{1 to} 12 ₃ are retracted by a predetermined amount and made to stand by, but the leading ends of the roll papers 12 _{1 to} 12 ₃ are cut. Instead, it is possible to advance to the standby position and wait.

In this figure, a photosensitive drum 25 for recording an image is arranged at the subsequent stage of the cutter device 23. Further, in front of this, each roll paper 12 _{1 to} 12
Cut paper receiving box 2 for accommodating the cut part at the tip of ₃
6 and a carry-out path 27 leading to this.

FIG. 7 and FIG. 8 show the state of control in such a conventional roll paper feeding device in which a roll paper is advanced to a standby position without waiting for the leading edge of each roll paper to be in standby. It is a thing. Note that such control is performed by a ROM (not shown) provided by a CPU (central processing unit) (not shown) provided in the roll paper feeding device.
It is designed to be performed using a program stored in (read only memory). First, as shown in FIG. 7, the CPU initializes the numerical value "n" stored in the working memory (not shown) to "1" (step S101), and the first
It is determined whether or not the standby position sensor 16 ₁ detects the first roll paper 12 ₁ (step S102).
If not detected (N), the forward rotation clutch (not shown) is turned on (step S103), and then it is checked whether or not the first standby position sensor 16 ₁ is turned on within a predetermined time (step S103). S104). If it is not within this time (N), no paper (no paper) is displayed for the first roll paper 12 ₁ on the display unit (not shown) (step S105), and the process ends (END). At this time, the operator operates the first supply roll 11 ₁
Replace with a new one, or if the initial settings are bad, try again to cancel the no-paper display.

When the first standby position sensor 16 ₁ is turned on in step S104 (Y), the forward rotation clutch is kept on until the predetermined time t ₁ elapses, and the first roll paper 12 ₁ is placed. Move forward by a fixed amount (step S1
06). Then, as shown in FIG. 8, the forward rotation clutch is turned off (step S107). Thereafter, the brake of the first feed roll 13 ₁ is turned on (step S10
8) Hold this for a certain time t ₂ (step S10
9), after stopping the rotation of the first feed roll 13 ₁ , the brake is turned off (step S110). In this way, the first roll paper is set to the standby position.

If the first roll paper 12 ₁ has already been detected by the first standby position sensor 16 ₁ in step S102 (FIG. 7), the first roll paper 12 ₁
The reverse clutch is turned on in order to reverse (step S111). Then, when the first standby position sensor 16 ₁ is turned off within a predetermined time (step S
112; Y), the reverse clutch is turned off at that time (step S113), and the forward clutch is turned on instead (step S114). Then, if the first standby position sensor 16 ₁ detects the first roll paper 12 ₁ within a predetermined time (step S115; Y), as in the case of the process of step S104, the process proceeds to step S106.
When the first standby position sensor 16 ₁ does not perform the operation described above within the time set in steps S112 and S115, respectively (step S11
2; N, step S115; N), it is possible that the first roll paper 12 ₁ causes a jam (paper jam) in the transport path. Therefore, in these cases, a jam is displayed on the display unit (step S116), and the process ends (END).

When the first roll paper is set to the standby position in step S110 shown in FIG. 8, the numerical value "n" is incremented by "1" to start the next work (step S).
117). If the value does not exceed the number of supply rolls (n is “3” in this case) mounted on this roll paper feeder (step S118; N), the standby position is set for the next roll paper. Done. Second in this example
For the roll paper 12 _2, the control similar performed returns to step S102. In this example the third paper roll 12 ₃ set standby position similarly for is performed after this,
All the work of waiting the leading edge of each roll paper at the waiting position is completed (END).

After the leading edge of each of the roll papers 12 _{1 to} 12 ₃ is placed at the standby position as described above, one of the designated roll papers 12 _X is selected at the time of copying. Will be sent to the front, will be cut by the cutter device 23, and will be used as cutting paper. In this case, the used roll paper 12 _X is likely to be continuously used even after this. Therefore, in order to shorten the time required for the subsequent printout, in such a roll paper feeding device, the leading end of the roll paper 12 _X used immediately before is left as it is near the cutter device 23.

[0012]

As described above, in the conventional roll paper feeding device that handles a plurality of roll papers, one roll paper is removed and the other roll papers are set at positions retracted from their confluence points. I had to wait. In this way, in the past, the standby position of the leading edge was different for each roll paper, so it is necessary to set the home position when sending these roll paper toward the cutter device independently for each roll paper. Has the drawback of being complicated.

Therefore, an object of the present invention is to provide a roll paper feeder which can easily position the leading end of each roll paper after the initial setting of each roll paper of the roll paper feeder is completed. To provide.

Another object of the present invention is to provide a roll paper feeding device capable of positioning the leading end of each roll paper in a short time.

Still another object of the present invention is to provide a roll paper feeding device capable of displaying the size of each roll paper at the same time as positioning the leading end of each roll paper.

[0016]

According to a first aspect of the present invention, there are provided: (a) a plurality of roll holding portions each capable of individually holding a supply roll formed by winding a long roll paper;
(B) Conveying rolls that are respectively arranged in the vicinity of the plurality of roll holding units and that feed roll paper that has been unraveled from the corresponding supply rolls, and (c) Conveying rolls that are arranged in the vicinity of the plurality of roll holding units. A set sensor for detecting the leading end of the roll paper unraveled from the corresponding supply roll, which is arranged on the downstream side which is the exit side of the roll,
(D) Roll paper arranged further downstream of the confluence point where roll papers unraveled from the supply rolls held by a plurality of roll holding sections merge downstream from the positions where these set sensors are arranged. A cutter device for cutting the sheet, (e) roll paper detection determination means for determining whether or not a plurality of set sensors detect the roll paper at a predetermined time, and (f) this roll paper detection Roll paper retreating control means for reversing the roll paper by reversing the transport roll corresponding to the set sensor that the determination means has determined to detect, and (g) roll paper retraction control The transport roll corresponding to the roll paper retracted by the means is rotated in the forward direction, and the corresponding set sensor does not reach the cutter device from the time when the roll paper is detected. When the standby position setting time required to move forward by a predetermined distance has passed, the roll paper standby position setting means for sensor detection that stops the rotation of the transport roll at that point and (h) the roll paper detection determination means detect Standby position required to move forward by the above-mentioned predetermined distance that does not reach the cutter device from the time when this set sensor detects the roll paper by rotating the transport roll corresponding to the set sensor that is determined not to perform The roll paper feeding device is provided with a sensor non-detection roll paper standby position setting means for stopping the rotation of the transport roll at the time when the setting time has elapsed.

That is, in the roll paper feeder according to the first aspect, a set sensor for detecting the leading end of each roll paper is individually arranged before the confluence point where the roll papers fed from the respective supply rolls merge. ing. And
At the time when the supply roll is replaced, etc., it is determined whether or not each set sensor detects the leading edge of the roll paper at a predetermined point in time. The roll paper is moved backward and then moved forward, and when the standby position setting time required to move forward by a predetermined distance has elapsed after detecting the set sensor, the conveyance is stopped. In this way, the leading edge of each roll paper is set to the standby position. When the set sensor does not detect the leading edge of the roll paper at the above-mentioned predetermined time point, it is not necessary to retract the roll paper. Therefore, in this case, the roll paper is moved forward, and the conveyance is stopped when the standby position setting time elapses from the time when the set sensor detects this, and similarly the leading edge of the roll paper is set to the standby position. I am going to do it. Thus, according to the invention of claim 1, each roll paper is
The roll paper can be set to the standby position by using a type of sensor (set sensor). Further, since each roll paper is accurately set to the standby position regardless of which roll paper is used next, it is possible to immediately perform the paper feeding operation from any of the roll papers from these standby positions. it can.

According to the second aspect of the present invention, (a) a plurality of roll holding portions each capable of individually holding a supply roll formed by winding a long roll paper; and (b) a plurality of roll holding portions. Conveying rolls that are respectively arranged in the vicinity and that feed the roll paper that has been unraveled from the corresponding supply rolls, and (c) on the downstream side that is the exit side of the conveying rolls that are arranged near the plurality of roll holding units. Placed,
A set sensor that detects the leading edge of the roll paper that has been unraveled from the corresponding supply roll, and (d) From the supply rolls that are respectively held by a plurality of roll holding parts downstream from the positions where these set sensors are arranged. A cutter device that is disposed further downstream of the confluence point where the unrolled roll paper merges and cuts the roll paper, and (e) Whether or not multiple set sensors detect the roll paper is predetermined. Until the set sensor stops detecting the roll paper detection judging means for judging at a predetermined time point, and (f) the transport roll corresponding to the set sensor judged to be detected by the roll paper detection judging means, and When there are a plurality of sets of corresponding transport rolls, these rolls are reversed in a temporally overlapping manner to roll back the corresponding roll paper, and (g) It is necessary to forwardly rotate the transport roll corresponding to the roll paper retreated by the roll paper retraction control means and to move forward by a predetermined distance that does not reach the cutter device from the time when the corresponding set sensor detects the roll paper. When the standby position setting time has elapsed, the rotation of this transport roll is stopped at the same time, and if there are multiple sets of the relevant transport rolls, the detection of the sensor is performed by controlling the forward rotation independently in a time-duplicated manner. When the roll roll standby position setting means and the (h) roll paper detection determination means detect the roll paper by rotating the transport roll corresponding to the set sensor determined not to detect the roll paper in the forward direction. From the time when the standby position setting time required to move forward by the predetermined distance described above that does not reach the cutter device is reached In addition to stopping the rolls, when there are multiple sets of the corresponding transport rolls, the roll paper feed position setting means for sensor non-detection time is used to independently perform normal rotation control in a form that overlaps in time. Prepare for the device.

That is, in the roll paper feeder according to the second aspect, a set sensor for detecting the leading end of each roll paper is individually arranged before the confluence point where the roll papers fed from the respective supply rolls merge. ing. And
Each set sensor determines whether or not the leading edge of the roll paper is detected at a predetermined time such as when the supply roll is replaced. The roll papers are overlapped with each other in time and are moved backward, then moved forward, and when the standby position setting time required to move forward by a predetermined distance after the set sensor is detected, the respective conveyances are stopped. . In this way, the leading edge of each roll paper is set to the standby position. When the set sensor does not detect the leading edge of the roll paper at the above-mentioned predetermined time point, it is not necessary to retract the roll paper. Therefore, in this case, the roll papers are moved forward in a timely overlapping manner, the conveyance is stopped at the time when the standby position setting time elapses from the time when the set sensor detects this, and the roll papers are similarly moved. The tip of each is set to the standby position. Thus, according to the invention of claim 2,
Since the control for setting each roll paper to the standby position is performed in parallel, these controls can be performed in a relatively short time. Further, since each roll paper is accurately set to the standby position regardless of which roll paper is used next, it is possible to immediately perform the paper feeding operation from any of the roll papers from these standby positions. it can.

According to the third aspect of the present invention, (a) a plurality of roll holding portions capable of individually holding the supply rolls formed by winding the long roll paper; and (b) a plurality of these roll holding parts. Transport rolls, which are respectively disposed in the vicinity of the rolls, and which feed the roll paper unraveled from the corresponding supply rolls, and (c) the downstream side, which is the exit side of the transport rolls disposed in the vicinity of the plurality of roll holding units. A plurality of set sensors arranged in a row in the width direction, and detecting the leading edge of the roll paper unwound from the corresponding supply roll in correspondence with the width of the roll paper; and (d) these set sensors. Cut the roll paper that is located further downstream of the confluence point where the roll papers unraveled from the supply rolls that are held in the roll holding parts respectively merge downstream from the position where A cutter device for performing a roll paper detection judging means for judging at a predetermined time which is predetermined whether the detected multiple sets sensors roll sheet (e),
(F) Roll paper retreat control means for reversing the roll paper by reversing the conveyance roll corresponding to the set sensor that is detected by the roll paper detection determination means until the set sensor stops detecting, and G) The transport roll corresponding to the roll paper retreated by the roll paper retreat control means is rotated in the forward direction and moved forward by a predetermined distance that does not reach the cutter device from the time when the corresponding set sensor detects the roll paper. When the standby position setting time required for the passage of the sensor roll time standby position setting means for stopping the rotation of the transport roll at that time,
(H) The roll paper detection discriminating means normally rotates the transport roll corresponding to the set sensor discriminated not to detect, and the set sensor does not reach the cutter device from the time the roll sensor is detected. Sensor standby time setting means for stopping the rotation of the transport roll at the time when the standby position setting time required to move forward by a distance of The roll paper feeding device is equipped with roll paper width display means for displaying the width of the roll paper for each supply roll depending on whether or not the roll paper is detected.

That is, in the third aspect of the invention, a plurality of set sensors for detecting the leading ends of the rolls are arranged in a row in the width direction before the confluence of the rolls fed from the supply rolls. It is located in. Then, it is determined whether or not each set sensor detects the leading edge of the roll paper at a predetermined time such as when the supply roll is exchanged, and a position that is not once detected when the leading edge is detected. Then, the roll paper is moved backward and then moved forward, and the conveyance is stopped when the standby position setting time required to move forward by a predetermined distance after detecting the set sensor has elapsed. In this way, the leading edge of each roll paper is set to the standby position. When the set sensor does not detect the leading edge of the roll paper at the above-mentioned predetermined time point, it is not necessary to retract the roll paper. So in this case, move the roll paper forward,
The conveyance is stopped when the standby position setting time elapses from the time when the set sensor detects this, and the leading edge of the roll paper is set to the standby position in the same manner. Further, the width of the roll paper is displayed for each supply roll depending on which sensor constituting the set sensor detects the roll paper. Thus, claim 3
According to the invention described above, since the set sensor is used for both the original detection of the leading end of the roll paper and the detection of the paper size (width), the paper size can be displayed. Further, since each roll paper is accurately set to the standby position regardless of which roll paper is used next, it is possible to immediately perform the paper feeding operation from any of the roll papers from these standby positions. it can.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows an appearance of a printer using a roll paper feeding device according to an embodiment of the present invention.
Two supply rolls are set inside the roll paper supply unit 31 of the printer 30. Above the roll paper feed unit 31, paper size display units 32 showing the paper width (paper size) of the attached supply rolls are arranged at corresponding positions. In addition, this printer 3
For 0, not only roll paper but also cut paper (cutting paper) can be set. Below the roll paper feed unit 31, a cut paper feed unit 33 is arranged, and a paper size display unit 34 for displaying the set paper size is provided in each of them. The printer 30 is also provided with a manual paper feed section 35, and a desired paper can be manually inserted from here. Further, a discharge tray 37 is arranged on the upper surface of the printer 30 so that the paper on which recording is performed inside the apparatus is discharged to the outside.

FIG. 2 shows an outline of the inside of this printer. The part surrounded by the dotted line in the drawing shows the roll paper feeding device 41 in one embodiment of the present invention. The roll paper feeder 41 includes a first supply roll 42 ₁ and a second supply roll 42 ₁ .
_Two supply rolls 42 ₂ of the supply roll 42 ₂ are mounted. The first paper roll 43 ₁ fed from the first supply roll 42 _1, a first feed roll 4
4 ₁ and this rolling contact between the nip roll 45 _1, and passes through the first neighbor set of the sensor 46 _1, the rotary blade and the fixed blade 48 of the cutter device 47 behind disposed (diagonally upward in the drawing) Pass between 49. Then, after passing through the encoder 51 arranged further behind it, it exits from the roll paper feeding device 41, travels along the transport paths 52 and 53, and passes through the image transfer position 55 of the photosensitive drum 54. .

Second roll paper 43₂Is the first feed
Roll 44₁And a nip roll 45 rolling on this₁
By the second supply roll 42₂From the same,
Image transfer position 55 of the photosensitive drum 54 via the transport path of
Is conveyed in the direction of. Second set sensor 46₂Is the
1 set sensor 46₁Second by operator as well as
Roll paper 43₂(First set sensor 46₁In the case of
Is the first roll paper 43 ₁) With a sensor to check the set
It is arranged.

The cut sheets 58 ₁ accommodated in the _first cut sheet accommodating tray 57 ₁ are fed _one by one from the uppermost layer by the feed roller 59 ₁ , and are separated by the separating roll 61.
After passing between ₁ and 62 ₁ , it passes through the conveying paths 63, 64 and 53 in order and passes through the image transfer position 55 of the photosensitive drum 54. The cut sheets 58 ₂ stored in the _second cut sheet storage tray 57 ₂ are also fed one by one from the uppermost layer by the feed roller 59 ₂ and after passing between the separating rolls 61 ₂ and 62 ₂ , similarly. The image transfer position 55 of the photosensitive drum 54 is passed through the conveying paths 63, 64, 53 in order.

Further, a sheet (not shown) manually fed from the manual sheet feeding section 35 passes through the conveying paths 71, 64 and 53 in order and passes through the image transfer position 55 of the photosensitive drum 54.

A toner image is transferred to these sheets of paper that selectively pass through the image transfer position 55 by the action of the transfer corotron 73. Then, it is conveyed by the conveyor belt 75 and passes between the heat roll 77 and the pressure roll 78. At this time, the toner image is fixed. The sheet on which the fixing has been completed is conveyed through the conveyance path 79 and is ejected onto the ejection tray 37 by the pair of ejection rolls 81 and 82.

FIG. 3 shows an essential part of a circuit configuration centering on a roll paper feeding device of such a printer. The roll paper feeding device 41 shown in FIG. 2 includes a CPU 91 for controlling each unit. The CPU 91
It is connected to each unit in the device through a bus 92 such as a data bus. It should be noted that, in this figure, the illustration of the input / output port and the drive circuit is omitted to simplify the description. In this figure, the ROM 93 is a read-only memory that stores programs for performing various controls of the roll paper feeder. RA
The M94 is a random access memory that temporarily stores data required for various controls. The set sensor 46 is a sensor for confirming the setting of the first or second roll paper 43 ₁ or 43 ₂ by the operator. The cutter clutch 96 is the cutter device 4 shown in FIG.
This is a clutch for operating 7 to cut the paper.
The feed clutch 97 is a clutch for normally rotating the first or second feed rolls 44 ₁ and 44 ₂ . The feed brake 98 is an electromagnetic brake for stopping the first or second feed rolls 44 ₁ and 44 ₂ . The reverse clutch 99 is a clutch for reversely rotating the first or second feed rolls 44 ₁ and 44 ₂ .

The timer 101 is a circuit for measuring the passage of a predetermined time. The encoder 51 is a device for measuring the carry amount of the roll papers 43 ₁ and 43 ₂ passing therethrough. The light emitting diode (LED) 103 is a display element that lights up when the first or second roll paper 43 ₁ or 43 ₂ is set. No-paper display unit 104
Is a device that displays when the first or second roll paper 43 ₁ or 43 ₂ runs out of paper.

FIG. 4 compares the control contents of the roll paper feeder of this embodiment with those of the conventional roll paper feeder. Each step S201 to S208 on the left side of the figure is control of the conventional apparatus, and each step S301 to S208 on the right side is
S306 is control of the apparatus of this embodiment. For example, it is assumed that the first roll paper 43 ₁ is cut for preceding recording (steps S201 and S301). In this case, the reverse clutch for the corresponding first feed roll is turned on (steps S202 and S302), and the first roll paper is retracted for a predetermined time (step S20).
3, S303). Then, the reverse rotation clutch is turned off to enter the standby state.

Here, after the first roll paper in the standby state,
A second roll of paper is fed instead as the outer roll.
(Steps S205 and S30)
5). Combine the leading edge of the first roll paper that was previously used.
To reverse the flow point further, turn the reverse clutch again.
turn on. The standby position sensor 16 shown in FIG. ₁
Retracted until it no longer detects the leading edge of the first roll paper
At that time, the reverse clutch is turned off (step S207),
Feed of the second roll paper waiting at this same position
Turn on the clutch to start its delivery (step
S208). On the other hand, in the case of this embodiment, the step
After S305, the first roll paper as the previous paper is
While being retracted by the reverse clutch, the second
Turn on the feed clutch for the roll paper
Feeding will be started (step S306).

Next, supply rolls are supplied to the roll paper feeding device.
To install the roll paper
And explain. First supply roll 42₁Setting
This will be explained by taking as an example. The operator is
Draw out the roll paper feed unit 31 of the linter horizontally
First supply roll 42 intended₁The roll paper holder
111₁(Fig. 2) Place on top. Then, the first supply
42₁The first roll paper 43 wound around the₁Where
Unravel only a fixed amount, and remove the paper portion
Drool 44₁And the first nip roll 45₁Through
Then, the first set sensor 46₁Slightly ahead of the position
Set to extend to. This is the first roll paper
43₁Is the first feed roll 44₁And the first nipple
Rule 45 ₁After being nipped in, turn these rolls by hand
Roll the first roll paper 43₁Advance the tip of the
It will be realized. In this way the first roll paper
43₁Is the first set sensor 46₁Detected by
And the corresponding light emitting diode 1 of the paper size display unit 32
03 lights up and the operator is informed that the setting is complete.
Let me. In this state, the operator sets the roll paper feed unit 31
To complete the setting.

FIG. 5 shows a state of control after the roll paper feed unit is housed in the printer body. In addition,
This control is similarly started after the jam is generated in the first or second roll paper 43 ₁ or 43 ₂ and the jam is removed, and also when the printer is powered on. .

The CPU 91 shown in FIG. 3 is shown in FIG.
The roll paper feed unit 31 is housed in the printer body and is not shown
When the sensor detects this, the first and second set sensors
46 ₁, 46₂To determine if is on or off
(Step S401). If both are on
(Y), start driving the paper feed unit motor (not shown)
(Step S402), the reverse rotation clutch 99 is set to a predetermined constant value.
Time t₃Only turn on (step S403), the time
Only the first and second roll paper 43₁, 43₂Is set back
Let And when the reverse clutch 99 is turned off
First and second set sensor 46₁, 46₂Turned off
It is determined whether or not it is present (step S404). This
As a result, if both or one of the set sensors 46₁Four
6₂If is on (N), the sensor
A jam is displayed on the ruling paper 43 (step S40).
5). This display changes the color of the light emitting diode 103
Do or make the device dedicated to the jam emit light
By.

The first and second set sensors 46₁, 46₂
Are both turned off (step S404;
Y), both feed rollers 44₁, 44₂Fee for
The clutch 97 is turned on (step S406). This
After time t_FourWithin these set sensors 46₁Four
6₂Is checked whether it is turned on (step S4
06), with the timer 101 from the time when each turned on
Fixed time t_FiveAt the time (step S408),
Turn off each feed clutch 97 (step
S409). This is these first and second rolls
Paper 43₁, 43 ₂The first or the corresponding
Second set sensor 46₁, 46₂A predetermined distance from
In order to control so that it will be in the standby state at the advanced position
It This control is further continued as described below. Was
However, in step S407, the first and second set sensors are
Service 46₁, 46₂The one that could not detect the paper
If it exists (N), step S405 is performed as before.
Then, the jam display will be performed.

Now, in step S409, when the respective feed clutches 97 are turned off, the feed rollers 4
4 _1, 44 feed the brake 98 is turned on ₂ of the distance to the stop in order to accurately set (step S41
0), the timer 101 counts the ON time t ₆ this that constant (step S411). After this, the feed brake 98 is turned off. At this time, the position where the leading ends of the first and second roll papers 43 ₁ and 43 ₂ are stopped is the standby position for both. This standby position is the first and second positions in the figure.
May be the confluence of the roll papers 43 ₁ and 43 ₂ of
The position may be closer to the cutter device 47 than this.

At this standby position, the roll paper feeder may display the paper size of the roll papers 43 ₁ and 43 _{2 or} the remaining amount. If a plurality of first and second set sensors 46 ₁ and 46 ₂ are arranged in the width direction corresponding to the paper widths of the respective paper sizes, which sensor detects the roll papers 43 ₁ and 43 ₂ . The first and second roll papers 43 currently set by
The paper size (paper width) of ₁ and 43 ₂ can be displayed. Further, it is also possible to display the remaining amount of each of the supply rolls 42 ₁ and 42 ₂ by measuring the present diameter of the supply rolls 42 ₁ and 42 ₂ .

By the way, in step S401, the first or
Is the second set sensor 46₁, 46 ₂Either one
Both may be off (step S40).
1). When pushing the roll paper feed unit 31 into the printer
The leading edge of the paper is₁, 46₂of
This is because there is a possibility that it may go out of the detection area.
In such a case, the set sensor 46 turned on
The roll paper 43 corresponding to
Similar control (steps S402 to S412) is performed.
It In addition, the ro
For the roll paper 43, the feed roller 44 and the nipple
Normally assumed to be nipped between
Under the condition, the next control is started.

That is, it is checked whether or not the corresponding roll paper 43 is detected by the corresponding set sensor 46 within the time t ₇ (steps S413 and S4).
14). If it is detected by the corresponding set sensor 46 (Y), the control proceeds to step S408 at that time,
As described above, the conveyance is performed to the standby position with the position of the corresponding set sensor 46 as a reference (step S
408-S412). As described above, as long as the paper is nipped between the feed roller 44 and the nip roll 45 in the setting stage of the roll paper, these papers are set to the standby position.

On the other hand, when the corresponding set sensor 46 does not turn on even after the time t ₇ has elapsed (step S414; N), the roll sheet is set between the feed roller 44 and the nip roll 45 at the setting stage. The reason is that the paper was not nipped. In this case, even if the feed clutch 97 rotates the first or second feed rolls 44 ₁ and 44 ₂ in the normal direction, the sheet is not conveyed. Therefore, in this case, the roll paper 4
3 is displayed as out of paper. This display is performed on the no-paper display unit 104 shown in FIG.

The first and second roll papers 43 ₁ ,
After setting 43 ₂ to each standby position, when there is a paper feed request, the corresponding roll paper 43 is sent out from these standby positions and used. Then, the leading end of the roll paper 43 cut by the cutter device 47 is returned to the standby position again by the same control as the above-mentioned control, and the next feed request is prepared. However, when it is known that the same roll paper 43 is continuously used, the roll paper 43 need not be returned to the standby position only during that period.

As described above, in the roll paper feeding device of this embodiment, the first and second roll papers 43 ₁ and 43 ₂ are installed in the device.
Despite being accommodated, the transfer of both is not controlled in sequence, but simultaneously or in parallel.
Therefore, regardless of which sheet is used next, the sheet can be quickly fed out.

In the embodiment, one set sensor 46 is provided for each roll paper, but a plurality of these are arranged in a row in the width direction of the roll paper, and which set sensor 46 of these sets the roll paper. You may make it detect the width of the roll paper set according to whether it detected. Such a detection result can be displayed on the paper size display unit 32 (FIG. 1).

[0045]

As described above, according to the first and second aspects of the invention, the conveyance is stopped at the time when the standby position setting time elapses after the set sensor detects the leading edge of the roll paper. The front end of each roll paper is set to the standby position. Therefore, since each roll paper can be detected by one type of sensor, the device can be simplified. Also, since each roll paper is set accurately to the standby position regardless of which roll paper is used next,
The paper feeding operation can be performed immediately from any of the roll positions from these standby positions, the control becomes simple, and the time required for paper feeding can be shortened.

Further, according to the second aspect of the invention, the setting work of a plurality of roll papers to the standby position is made to overlap in time and the parallel control is performed, so that the time required for the control is greatly reduced. can do.

According to the third aspect of the invention, the set sensor is used to detect the original leading edge of the roll paper and the paper size (width).
Since it is used for both of the detections, there is an effect that it is possible to display the respective paper sizes of the roll paper by minimizing the components of the apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a printer using a roll paper feeding device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an outline of the inside of a printer using the roll paper feeding device of the present embodiment.

FIG. 3 is a circuit diagram showing a main part of a circuit configuration of a printer centering on a roll paper feeding device of this embodiment.

FIG. 4 is an explanatory diagram comparing the control content of the roll paper feeding device of the present embodiment with that of a conventional roll paper feeding device.

FIG. 5 is a flowchart showing a state of control after the roll paper feed unit is housed in the printer body in the present embodiment.

FIG. 6 is a schematic configuration diagram showing a main part of a first example of a conventional roll paper feeder.

FIG. 7 is a flow chart showing the first half of control of a conventional roll paper feeding device that advances the roll paper to the standby position and cuts it into the standby position without trimming the leading ends of the roll papers.

FIG. 8 is a flowchart showing a continuation of the flow shown in FIG. 7.

[Explanation of symbols]

30 ... Printer, 31 ... Roll paper feeding unit, 32 ... Paper size display unit, 41 ... Roll paper feeding device, 42 ₁ ... First supply roll, 42 ₂ ... Second supply roll, 43 ₁ ... First Roll paper, 43 ₂ Second roll paper, 44 Feed roll, 45 Nip roll, 46 Set sensor, 47
... Cutter device, 91 ... CPU, 93 ... ROM, 94 ... R
AM, 96 ... Cutter clutch, 97 ... Feed clutch, 99 ... Reverse clutch, 101 ... Timer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location // B41J 11/42 K

Claims (3)

[Claims] 1. A plurality of roll holders capable of individually holding a supply roll formed by winding a long roll of paper, and a plurality of roll holders respectively disposed near the plurality of roll holders. A transport roll that sends out roll paper that has been unraveled from, and rolls that have been respectively unraveled from the corresponding supply rolls that are arranged on the downstream side that is the exit side of the transport rolls that are arranged in the vicinity of the plurality of roll holding units. A set sensor that detects the leading edge of the paper, and a confluence point at which the roll papers unraveled from the supply rolls respectively held by the plurality of roll holding units merge downstream from the positions where these set sensors are arranged. A cutter device that is arranged further downstream and that cuts the roll paper, and a place where a plurality of the set sensors detect the roll paper are predetermined. At this time, the roll paper detection determining means and the set roll which corresponds to the set sensor determined to be detected by the roll paper detection determining means are reversed until the set sensor stops detecting the roll paper. The roll paper retreating control means for retreating and the conveyance roll corresponding to the roll paper retreated by the roll paper retreating control means to rotate in the forward direction and the corresponding set sensor detects the roll paper to the cutter device. When the standby position setting time required to move forward by a predetermined distance that does not reach is reached, at that time the sensor detection roll paper standby position setting means for stopping the rotation of the transport roll, and the roll paper detection determination means The conveyance roll corresponding to the set sensor that is determined not to detect is rotated forward and this set sensor Sensor non-detection roll paper that stops the rotation of the transport roll at the time when the standby position setting time required to move forward by the predetermined distance that does not reach the cutter device from the time of detection has passed A roll paper feeding device comprising a standby position setting means. 2. A plurality of roll holding parts capable of individually holding a supply roll formed by winding a long roll of paper, and a plurality of roll holding parts arranged in the vicinity of the plurality of roll holding parts, respectively. A transport roll that sends out roll paper that has been unraveled from, and rolls that have been respectively unraveled from the corresponding supply rolls that are arranged on the downstream side that is the exit side of the transport rolls that are arranged in the vicinity of the plurality of roll holding units. A set sensor that detects the leading edge of the paper, and a confluence point at which the roll papers unraveled from the supply rolls respectively held by the plurality of roll holding units merge downstream from the positions where these set sensors are arranged. A cutter device that is arranged further downstream and that cuts the roll paper, and a place where a plurality of the set sensors detect the roll paper are predetermined. The roll paper detection determination means that determines at the point of time and the transport roll that corresponds to the set sensor that the roll paper detection determination means determines to perform detection until the set sensor stops detecting and the corresponding transport When there are a plurality of sets of rolls, the roll paper retreating control means for reversing these rolls in a temporally overlapping manner to retreat the corresponding roll paper, and the roll paper retracted by the roll paper retreating control means The standby roll setting time required to move forward by a predetermined distance that does not reach the cutter device from the time when the transport roll is rotated in the forward direction and the corresponding set sensor detects the roll paper has elapsed. The rotation of the machine is stopped, and when there are multiple sets of applicable transport rolls, these are independently forward-controlled in a form that overlaps in time. The roll paper standby position setting means for detecting the sensor and the set roll that corresponds to the set sensor that the roll paper detection determination means determines not to perform normal rotation, and this set sensor detects the roll paper. At the time when the standby position setting time required to move forward by the predetermined distance, which does not reach the cutter device from the time when the operation is performed, the rotation of the transfer roll is stopped, and a plurality of corresponding transfer rolls are set. A roll paper feeding device characterized by comprising a roll paper standby position setting means for sensor non-detection which independently performs forward rotation control in a form of overlapping these in time when they exist. 3. A plurality of roll holding parts capable of individually holding a supply roll formed by winding a long roll paper, and a plurality of roll holding parts respectively arranged in the vicinity of the plurality of roll holding parts. A transport roll that sends out roll paper that has been unraveled from, and a plurality of rolls are respectively arranged in a row in the width direction on the downstream side that is the exit side of the transport rolls that are arranged in the vicinity of the plurality of roll holding portions, and the corresponding rolls are provided. A set sensor that detects the leading end of the roll paper unraveled from the supply roll in correspondence with the width of the roll paper, and a plurality of roll holding sections on the downstream side of the positions where these set sensors are arranged, respectively. A cutter device arranged at a further downstream side of a confluence point where the roll papers unraveled from the held supply rolls merge to cut the roll papers, and a plurality of the sets. Corresponding to the roll paper detection determination means that determines whether or not the sensor is detecting roll paper at a predetermined time point, and the set sensor that is determined by the roll paper detection determination means. Roll paper retreating control means for reversing the roll paper by reversing the carry roll until the set sensor no longer detects, and correspondingly revolving the carry roll corresponding to the roll paper retreated by the roll paper retreating control means. The sensor detection that stops the rotation of the conveyance roll at the time when the standby position setting time required to move forward by a predetermined distance that does not reach the cutter device from the time when the set sensor detects the roll paper has elapsed It corresponds to the time roll paper standby position setting means and the set sensor that the roll paper detection determination means determines not to detect. At the time when the standby position setting time required to move forward by the predetermined distance that does not reach the cutter device from the time when the set sensor detects the roll paper by rotating the transport roll in the forward direction has elapsed. A sensor non-detection roll paper standby position setting means for stopping the rotation of the transport roll, and a roll for displaying the width of the roll paper for each supply roll depending on which sensor constituting the set sensor detects the roll paper A roll paper feeder comprising a paper width display means.