JP2000289904A - Paper feeder and image forming device - Google Patents

Paper feeder and image forming device

Info

Publication number
JP2000289904A
JP2000289904A JP11099858A JP9985899A JP2000289904A JP 2000289904 A JP2000289904 A JP 2000289904A JP 11099858 A JP11099858 A JP 11099858A JP 9985899 A JP9985899 A JP 9985899A JP 2000289904 A JP2000289904 A JP 2000289904A
Authority
JP
Japan
Prior art keywords
roll paper
paper
cut
leading
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11099858A
Other languages
Japanese (ja)
Inventor
Yasushi Kamimura
Manabu Yokoi
恭 上村
学 横井
Original Assignee
Fuji Xerox Co Ltd
富士ゼロックス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd, 富士ゼロックス株式会社 filed Critical Fuji Xerox Co Ltd
Priority to JP11099858A priority Critical patent/JP2000289904A/en
Publication of JP2000289904A publication Critical patent/JP2000289904A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a paper feeder that suppresses waste of paper and is simple to operate, in exchanges of a plurality of types of roll paper, and an image forming device. SOLUTION: The leading edge of roll paper 300 housed in a roll paper holding part 30 is unrolled by a delivery roller 31, whereat the outside diameter of the roll paper 300 is measured. Depending on the measured outside diameter, a control part 9 determines the length of the roll paper 300 from the leading edge to a cut position, at which a rotary cutter 33 cuts the roll paper 300. The roll paper 300 is then delivered out of the device along a feed path 11 by a feed roller 34-1 before its leading edge is set in position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a paper feeder for accommodating roll paper formed by winding long paper, and an image forming apparatus using the paper feeder.

[0002]

2. Description of the Related Art In an image forming apparatus such as a large-sized copying machine for drawing, a roll paper formed by winding a continuous band of recording paper (copy paper) around a core rod is pulled out, cut, and cut. 2. Description of the Related Art An image is formed on recording paper that has been used. The roll paper is set in the roll paper storage unit by the user with the leading end of the roll paper pulled out by a predetermined length. Here, the leading edge of the roll paper must be aligned on a line perpendicular to the transport direction. However, in practice, the tip is often inclined or irregular with respect to a line perpendicular to the transport direction. Therefore, in the conventional image forming apparatus,
When replacing the roll paper, a leading edge cut mode for aligning the leading edge of the roll paper by pulling out the leading edge portion of the newly set roll paper and cutting it with a cutter at a predetermined length from the leading edge is provided. I have. By instructing the leading edge cut mode with the instruction button and cutting the leading edge of the new roll paper set with a cutter, the user can align the leading edges of the roll paper. The cut head portion is transported along a predetermined transport path and is discharged out of the apparatus. Here, the length of the head portion to be discarded is made shorter (about 200 mm) by setting the length of the head portion to be cut to be equal to the arrangement interval of the conveyance rollers arranged in the conveyance path. (See JP-A-9-38894).

[0003] In general, the roll paper as a product is taped at the end, so the tape is peeled off when replacing the roll paper, and then used.
It may remain on the outer periphery of the roll paper. Also, when setting roll paper, the outer peripheral portion of the roll paper may be stained by sweat or the like of the user's hand, and in order to obtain good printing, not only the above-described cutting of the front end portion alone, It is necessary to cut the length of the outer circumference (one circumference) of the roll paper. In particular, an apparatus for performing an operation of holding a feeding roll by rotating a roll paper (Japanese Unexamined Patent Publication No.
In Japanese Patent Application Laid-Open No. -144659), there is a high possibility that the outer peripheral portion of the roll paper is stained during operation. In such a case, the user repeatedly specifies the leading edge cut mode in consideration of the length corresponding to the outer circumference of the roll paper, and cuts the length of the outer circumference of the roll paper.

[0004]

However, the outer diameter of the roll paper used varies depending on the type of roll paper, and therefore, the length of the leading end portion to be cut corresponding to the outer circumference of the roll paper differs. . For example, the general 20
The outer diameter of a roll of 0 m high quality paper is about φ1
70 mm, and the length corresponding to the outer periphery of the roll paper is 5 mm.
65 mm. Further, among the roll papers formed by winding a thick film, there is a roll paper formed by winding a 50 m thick film, and the outer diameter of the roll paper is about φ12.
0 mm, and the length corresponding to the outer circumference of the roll paper is 37 mm.
7 mm.

[0005] Here, to remove the contaminated portion on the outer periphery of the roll paper, in the case of roll paper in which 200 m of high-quality paper is wound, the user generally needs to repeat the leading edge cut mode three times. However, in the case of roll paper on which a 50 m thick film is wound, the leading edge cut mode may be repeated twice. When these roll papers are exchangeably accommodated and used, the user needs to consider whether to execute the leading edge cut mode twice or three times in order to eliminate waste of the paper. There is a problem of poor sex. In particular, when several types of roll paper are used interchangeably, the operability is further deteriorated.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a paper feeder and an image forming apparatus which can suppress waste of paper and have good operability when replacing a plurality of types of roll paper.

[0007]

According to a first aspect of the present invention, there is provided a paper feeder, comprising: a roll paper accommodating section for accommodating a roll paper formed by winding a long paper; A paper pulling unit that pulls out the roll paper housed in the paper storage unit while unwinding it, a cutter that cuts the paper drawn by the paper pulling unit, and a paper that is drawn by the paper drawing unit and cut by the cutter Means for feeding the roll paper to a predetermined transport path, and when a new roll paper is stored in the roll paper storage section, the leading end of the new roll paper stored is pulled out and cut at a predetermined length from the leading end. Outer diameter measuring means for measuring the outer diameter of the roll paper accommodated in the roll paper accommodating portion, in a paper feeder having a paper preparing means for aligning the leading end of the new roll paper by causing Wherein the paper preparation means is configured to move the new roll paper stored in the roll paper storage section from the leading end of the new roll paper to the cutting position in accordance with the outer diameter measured by the outer diameter measuring means. Is characterized by determining the length of

[0008] Here, the length from the leading end of the new roll paper to the cutting position by the paper preparing means is defined as a predetermined first length corresponding to the outer diameter measured by the outer diameter measuring means, Preferably, there is provided a selecting means for selecting from a predetermined second length independent of the outer diameter measured by the outer diameter measuring means.

According to another aspect of the present invention, there is provided an image forming apparatus comprising: a roll paper accommodating section in which a roll of long paper is wound; A sheet pulling means for pulling out the accommodated roll paper while unwinding it, a cutter for cutting the sheet pulled out by the sheet pulling means, and a sheet conveyed by the sheet pulling means and cut by the cutter in a predetermined manner A sheet sending unit that sends the sheet to the path, an image forming unit that forms an image on the sheet conveyed via the predetermined conveyance path, and a case where new roll paper is stored in the roll paper storage unit. Paper forming means for pulling out the leading end of the new roll paper and cutting the roll at a predetermined length from the leading end to align the leading end of the new roll paper. An outer diameter measuring means for measuring an outer diameter of the roll paper accommodated in the roll paper accommodating section, wherein the paper preparing means comprises a means for measuring the outer diameter of the new roll paper accommodated in the roll paper accommodating section. The length from the leading end of the new roll paper to the cutting position is determined in accordance with the outer diameter measured by the diameter measuring means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view of an image forming apparatus using a sheet feeding device according to an embodiment of the present invention.

An image forming apparatus 100 shown in FIG. 1 includes an image forming section 1 for forming an image on a recording sheet, and a sheet feeding device 200.
Is provided. The image forming section 1 is provided with an operation display section 8 for displaying a message such as a paper jam or running out of paper, or for performing necessary operations. The paper feeder 200 has three drawer-type housings 3,
4 and 5 are provided. Roll paper, which will be described in detail later, is housed in the housings 3 and 4 in a replaceable manner, and the cut paper is housed in the housing 5.

The casings 3 and 4 are provided with transport path doors 36 and 46 having knobs 36a and 46a, respectively. By operating these knobs 36a and 46a, the transport path doors 36 and 46 are opened. The recording paper remaining inside due to paper jam or the like can be removed. The housing 5 is provided with a knob 56a for pulling out the housing 5.

Further, each of the transfer path doors 36 of each of the casings 3 and 4,
Although details will be described later, a display unit 46 displays the type, size, and remaining amount of each roll paper housed in each of the housings 3 and 4 and cuts the leading end of each roll paper. Sub-operation units 60 and 70 provided with buttons for the operation are provided.

FIG. 2 is a sectional view showing a state in which the housing of the sheet feeding device shown in FIG. 1 is pulled out.

The housing 3 shown in FIG. 2 is provided with a roll paper accommodating section 30 in which a roll paper 300 formed by winding a long paper is exchangeably accommodated. A rail mechanism 10 is provided on the lower side surface of the housing 3, and the housing 3 is configured to be pulled out by the rail mechanism 10 in the transport direction of the roll paper 300 (on the right side in the drawing). Further, the housing 4 is provided with a roll paper storage unit 40 in which a roll paper 400 similar to the roll paper 300 is exchangeably stored, and the housing 5 further includes a cut paper storage unit in which the cut paper 500 is stored. 50 are provided. Although the housings 4 and 5 can be pulled out from the image forming apparatus 100 main body similarly to the housing 3, they are not shown here. Although not shown, a paper quality selection switch and a paper type selection switch are provided for each roll paper on the front upper portion of the housing 3, and when the roll paper is set, the paper quality of the roll paper and the usage of the roll paper are set. Which roll paper is to be registered is registered. A control unit 9 is provided behind the housing 5 (left side in this figure) of the paper feeding device 200. The control unit 9 is an example of a paper preparation unit according to the present invention, and the roll paper storage unit 3
New roll paper 300, 400 stored in 0, 40
The length of the new roll paper 300, 400 from the leading end to the cutting position is determined and cut according to the outer diameter measured by the outer shape measuring unit 82, which will be described later. Are controlled to align the tips of the. Details will be described later.

When replenishing the roll paper 300, as shown in FIG. 2, the roll paper 300 is loaded from above with the housing 3 pulled out from the paper feeding device 200, and after selecting the paper quality and the paper series. Then, the housing 3 is pushed back to the paper feeding device 200. When it is detected that the housing 3 has been pushed back to the paper feeding device 200, the control unit 9 recognizes that a new roll paper 300 has been stored, and performs an initialization operation described later.

FIG. 3 is a cross-sectional view schematically showing a transport path on which the recording paper is transported in the image forming apparatus shown in FIG.

FIG. 3 shows roll paper storage units 30 and 4 provided in a paper feeding device 200 constituting the image forming apparatus 100.
0, a transport path 11 for transporting the recording paper to the image forming position of the image forming unit 1 when the recording paper is fed from a predetermined recording paper storage unit of the cut paper storage unit 50 is shown. . The transport path 11 is provided in each of the roll storage units 30 and 4
0, parts 11a and 11 corresponding to the cut sheet storage unit 50
b, 11c and a portion 11d in the image forming section 1.

The paper feeder 200 has a roll paper storage 3
Each of the delivery rollers 31 and 41 (each of which is an example of a sheet withdrawing unit according to the present invention) is provided to unwind and withdraw the roll sheets 300 and 400 contained in the rolls 0 and 40. Further, a feed roller 51 for feeding out the cut sheet 500 from the cut sheet storage section 50 is also provided.

The paper feeder 200 is provided with rotary cutters 33 and 43 for cutting the recording paper pulled out by the feed rollers 31 and 41, respectively.

Further, in the paper feeding device 200, transport rollers 34_1, 34_2, and 44_1 (each of which is provided by a feed roller 31, 41, and feeds the cut recording paper cut by each rotary cutter 33, 43 to the transport path 11). An example of the sheet sending means according to the present invention) is provided.

Further, when the cut sheet 500 is fed out from the cut sheet storage section 50, the sheet feeding apparatus 200 conveys the cut sheet 500 to the image forming section 1 along the conveying path 11 to the conveying rollers 44_2 and 54. Is also provided.

The image forming section 1 includes roll paper storage sections 30 and 4
0, an image is formed on the recording paper fed from the recording paper storage selected from the cut paper storage 50 as described later.

In the housing 3, the leading end portion of the roll paper 300 sent out by the feed roller 31 is cut by a rotary cutter 33 arranged on the sub-conveyance path 32, and is conveyed by the conveyance roller 34 _ 1 as recording paper by the conveyance roller 34 _ 1. 1
1 is supplied in the portion 11a. In the housing 4,
The leading end portion of the roll paper 400 sent out by the feed roller 41 is cut by the rotary cutter 43 arranged on the sub-conveyance path 42 and is conveyed as recording paper by the conveyance roller 4.
4_1, it is supplied into the portion 11b of the transport path 11. Further, in the housing 5, the cut paper 50
0 is supplied to the portion 11c of the transport path 11 one by one via the transport roller 54.

The parts 11a, 11 of the transport path 11
b, 11c, the recording paper supplied to the transport rollers 34_
1, 34_2, 44_1, 44_2, the transport route 1
1 is supplied to the portion 11d. A manual paper feed unit 6 is provided on the right side surface of the image forming unit 1 shown in FIG.
Can be supplied to the portion 11d.

The recording paper supplied to the portion 11 d of the transport path 11 is transported downstream by the transport roller 12 and reaches the photosensitive drum 14 via the registration roller 13. Around the photosensitive drum 14, a charger 15 and a developing device 16
And a pre-transfer corotron 17, a transfer corotron 18,
A cleaner 19 is provided. The surface of the photoreceptor drum 14 is uniformly charged to a predetermined voltage by the charger 15, and then the surface of the photoreceptor drum 14 is exposed to an image by exposure means (not shown) to form an electrostatic latent image. Is done. The electrostatic latent image formed on the surface of the photoreceptor drum 14 is developed by a developing unit 16 to develop a toner. The toner image formed on the photosensitive drum 14 is
If necessary, the toner is charged by the pre-transfer corotron 17, and then transferred onto the recording paper by discharging the transfer corotron 18. The recording paper to which the toner image has been transferred is guided to the fixing device 21 by the vacuum transport unit 20 and is fixed. The recording paper on which the fixing is completed is discharged from the recording paper discharge port 7 by the discharge roller 22.

On the other hand, the surface of the photosensitive drum 14 on which the transfer of the toner image and the transfer to the recording paper have been completed is cleaned of residual toner by a cleaner 19, and is ready for the next image forming step.

In the image forming apparatus 100 of the present embodiment, the arrangement intervals of the conveying rollers 34_1, 34_2, 44_1, 44_2 and the vacuum conveying section 20 in the conveying direction are as follows.
It is set so that a 200 mm recording paper can be conveyed.

Further, as described above, the image forming apparatus 100 of the present embodiment has the transport path door 36, which covers the portions 11a and 11b of the transport path 11 disposed in the casings 3 and 4 so as to be openable and closable. 46 is provided, and the recording paper is
When a paper jam occurs in a state of straddling between the sheet and the portion 11b, the recording paper can be easily removed by opening the transport path doors 36 and 46.

FIG. 4 is an enlarged view showing a cross section of the housing shown in FIG.

A roll paper 300 of A3 size (297 mm in width) to A0 size (841 mm in width) is accommodated in the roll paper accommodating section 30 provided in the housing 3 shown in FIG.
1 is accommodated. An outer diameter measuring unit 82 (see FIG. 5), which measures the outer diameter of the roll paper 300, is attached to the support shaft 81. The roll paper 300 is moved at a constant speed V (mm / sec) by the feed roller 31.
At the upper right of FIG. The delivery roller 31 also has a function of rewinding the leading portion of the roll paper 300 after the cutting operation in a direction opposite to the above direction.

Downstream of the feed roller 31, a reflection type photo sensor 37_ for detecting the width of the roll paper 300 is provided.
1 are provided in a direction perpendicular to the plane of the drawing.

Further, downstream of the photo sensor 37_1,
The rotary cutter 33 described above is provided. When the rotary cutter 33 receives a cutting operation signal in response to the length information of the document, the rotary blade 33a of the rotary cutter 33 rotates, and its cutting edge 33b is connected to the fixed blade 33c. The roll paper 300 is continuously rubbed and cut into a predetermined length. Since the roll paper 300 is continuously transported even during cutting by the rotary cutter 33, the rotary cutter 33 is mounted obliquely with respect to the transport direction of the roll paper 300 so that the cut portion is perpendicular to the transport direction. I have.

Downstream of the rotary cutter 33, a reflection type photo sensor 37_2 for detecting the leading end of the transport roller 34_1 and the roll paper 300 is provided. Further, downstream of the transport roller 34_2, the roll paper storage unit 40, the roll paper 400 from the cut paper storage unit 50, and the cut paper 50
A photo sensor 38 for detecting 0 is also provided.

The transfer path portion 11a is covered with a transfer path door 36 so as to be freely opened and closed. In FIG. 4, the transport path door 36 in the closed state is indicated by a solid line, and the transport path door 3 in the open state is illustrated.
6 is indicated by a dashed line.

In the initialization operation, the roll paper 300
The recording paper pulled out of the recording paper is sent out to the detection position of the photosensor 37_1 by the feed-out roller 31 to perform size detection, and the leading end position of the recording paper is sent out to a position short of the transport roller 34_1. Roll paper 3
While 00 is being sent out, the outer diameter of the roll paper 300 is measured by the outer diameter measuring unit 82 and stored in the control unit 9.

Thereafter, the recording paper pulled out from the roll paper 300 is returned, and the leading end of the recording paper is
At the point immediately before reaching 3, the standby state is established, and the size, paper quality, and remaining amount are displayed on the sub-operation unit 60 described later.

FIG. 5 is a diagram showing the configuration of the outer diameter measuring unit.

FIG. 5 shows a support shaft 81 to which a gear 81a is attached and a roll paper 30 inserted into the support shaft 81.
0 and the outer diameter measuring unit 82 are shown. Roll paper 30
The leading end of 0 is stopped with a tape 301.

The outer diameter measuring section 82 includes a disk 82a having a slit, a photo interrupter 82b, a gear 82
c.

When the support shaft 81 into which the roll paper 300 is inserted rotates, the disk 82 is rotated via the gears 81a and 82c.
a is rotated, whereby the angular velocity of the disk 82a is detected by the photo-interrupter 82b, and based on this, the outer diameter of the roll paper 300 is calculated by the controller 9 and stored.

FIG. 6 is a detailed view of the sub operation unit.

The sub operation unit 60 shown in FIG. 6 includes a size display unit 61, a paper quality display unit 62, a remaining amount display unit 63, and a tip cut instruction button 64.

The size display section 61 is made up of 7-segment type LEDs. The size display section 61 displays a series based on the series registered by the paper series selection switch.
Loaded roll paper 3 detected at the time of the above initialization
A size of 00 is displayed.

In the paper quality display section 62, the paper quality registered by the paper quality selection switch, that is, any part of treble (tracing paper), plain paper, and film is displayed by backlight.

The remaining amount display section 63 displays the remaining amount of the roll paper 300 on the LED in four stages based on the outer diameter of the roll paper 300 measured at the time of the above initialization.
As the remaining amount of the roll paper 300 increases (the outer diameter increases), the number of LEDs to be lit increases (up to four). As the remaining amount of the roll paper 300 decreases, the LEDs are turned off in order from the top. In addition, the remaining amount display section 63 includes, as described later,
The number of executions of the leading edge cut mode is also displayed.

The leading edge cut instruction button 64 is an example of the selecting means according to the present invention. The length from the leading edge of the new roll paper 300 to the cutting position by the control unit 9 is determined by the outer diameter measuring unit 82 described above. A button for selecting from a predetermined first length corresponding to the measured outer diameter and a predetermined second length irrelevant to the outer diameter measured by the outer diameter measuring unit 82. By pressing the leading edge cut instruction button 64, an instruction to execute the leading edge cut mode of the recording paper is issued. The length of the recording paper to be cut can be selected by the number of times the leading edge cut instruction button 64 is pressed. The number of presses is displayed on the remaining amount display section 63.

Hereinafter, the execution of the leading edge cut mode by the instruction of the leading edge cut button 64 after the roll paper 300 is loaded will be described.

When the tip cut instruction button 64 is pressed once,
After the remaining amount display on the remaining amount display section 63 disappears, the LED at the bottom
Lights up. When the leading edge cut instruction button 64 is not continuously pressed, the mode shifts to the leading edge cut mode, in which the recording paper is pulled out from the roll paper 300 by the feed roller 31 from the home position position immediately before the rotary cutter 33, and 200 mm from the leading edge of the recording paper. At the position, the sheet is cut by the rotary cutter 33 and discharged out of the apparatus via the transport path 11. When the discharge is completed, the remaining amount display of the remaining amount display section 63 is restored. In this case, the roll paper 300 is cut at a leading end portion, that is, a length shorter than the length of one circumference of the roll paper 300 (the predetermined second length described above).

When the tip cut instruction button 64 is continuously pressed twice, the remaining amount display of the remaining amount display section 63 is turned off, and the second LED counting from the bottom is turned on. If the button 64 is not pressed, the mode shifts to the leading edge cut mode, in which the recording paper is pulled out by the feed roller 31 from the home position just before the rotary cutter 33, and the outer periphery of the loaded roll paper 300 is moved from the leading edge of the recording paper. Rotary cutter 3 slightly longer
3 and is discharged out of the apparatus via the transport path 11. For example, when a general roll paper 300 formed by winding 200 m of high-quality paper is loaded, the control unit 9 stores information of the outer diameter φ170 mm based on the number of pulses of the disk 82a in the initialization operation. , Based on this stored information,
Xπ = 534 mm is calculated. For this reason, it is cut by the rotary cutter 33 here at 550 mm (that is, the above-mentioned predetermined first length), and the tape is discharged out of the apparatus including the trace of peeling off the tape.

As described above, depending on the number of times the leading edge cut instruction button 64 is pressed, a choice is made as to whether the leading edge of the roll paper 300 is cut at a minimum and the leading edges are trimmed, or the outer peripheral portion is also cut to remove tape marks and dirt on the outer periphery. Can be easily performed by the operator. Moreover, the number of times the leading end cut instruction button 64 is pressed is displayed on the remaining amount display section 63 near the cut instruction button 64, so that the operator does not get lost.

Most of the tape traces and stains on the outer periphery of the roll paper are removed by pressing the tip cut instruction button 64 twice, but the hand when loading the roll paper wound with tracing paper is loaded. In the case of dirt due to sweat, it may not be limited to the outer periphery. At that time, the tip cutting instruction button 64 is continuously pressed three times. Then, the remaining amount display section 6
The display of the remaining amount of 3 disappears, and up to the third LE from the bottom
D lights, and the mode shifts to the front end cut mode. The recording paper is pulled out from the home position position immediately before the rotary cutter 33 by the feed roller 31, and cut from the leading end of the recording paper by the rotary cutter 33 to be slightly longer than two outer circumferences of the loaded roll paper 300, and conveyed. It is discharged out of the device via the path 11.

There is a predetermined time interval from the point of pressing the leading edge cut button 64 to the transition to the leading edge cut mode in terms of operability. During this time, the control unit 9 confirms the input by pressing the next tip cut instruction button 64.

In the present embodiment, when the leading edge cut instruction button 64 is pressed four times, the remaining amount display of the remaining amount display section 63 is turned off and the leading edge cut instruction button 64 After entering the state of waiting for a press input, the shift to the leading edge cut mode is canceled, and the remaining amount of the loaded roll paper 300 is displayed again on the remaining amount display unit 63.

Further, in the present embodiment, the description has been given that the 550 mm length corresponding to the outer circumference of the roll paper 300 is cut at a time. However, the recording paper is cut twice into 200 mm and 350 mm, and the recording paper is discharged. Discarded recording paper may be facilitated.

In the present embodiment, the outer diameter of the roll paper 300 is measured by the outer diameter measuring unit 82 having the disk 82a and the photo interrupter 82b.
The present invention is not limited to this, and the outer diameter measuring means of the present invention may be any one that measures the outer diameter of the roll paper, such as a photosensor or a microswitch.

Further, in this embodiment, the roll paper 300
Has been described with an example in which the leading end of the roll paper 400 is cut.
The same applies to the case of cutting off the tip portion.

As described above, in the image forming apparatus 100 using the sheet feeding device 200 of the present embodiment, whether only the leading ends of the roll papers 300 and 400 are trimmed in the leading edge cut mode, the outer circumference of the roll papers 300 and 400 The user only has to instruct whether to cut the length corresponding to the minute (one to three rounds) by the number of times the tip cut instruction button 64 is pressed, and the number of presses is also displayed using the remaining amount display unit 63. Therefore, operability is good.

The roll papers 300 and 400 used
Even if the outer diameters of the roll papers 300 and 400 are different depending on the type, the leading end portion to be cut is only slightly longer than the length corresponding to the outer periphery, so that waste of the recording paper can be reduced.

[0061]

As described above, according to the present invention,
When exchanging a plurality of types of roll paper, it is possible to provide a paper feeder and an image forming apparatus that can suppress waste of paper and have good operability.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an image forming apparatus using a sheet feeding device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state where a housing of the sheet feeding device illustrated in FIG. 1 is pulled out.

FIG. 3 is a cross-sectional view schematically illustrating a conveyance path through which a recording sheet is conveyed in the image forming apparatus illustrated in FIG.

FIG. 4 is an enlarged view showing a cross section of the housing shown in FIG. 3;

FIG. 5 is a diagram showing a configuration of an outer diameter measuring unit.

FIG. 6 is a detailed view of a sub operation unit.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 image forming unit 3, 4, 5 housing 6 manual feed unit 7 recording paper discharge port 8 operation display unit 9 control unit 10 rail mechanism unit 11 transport path 11 a, 11 b, 11 c, 11 d parts of transport path 12, 34_1 .34_2, 44_1, 44_2, 54
Transport roller 13 Registration roller 14 Photoreceptor drum 15 Charger 16 Developing device 17 Pre-transfer corotron 18 Transfer corotron 19 Cleaner 20 Vacuum transport unit 21 Fixing device 22 Discharge roller 30, 40 Roll paper storage unit 31, 41, 51 Feed-out roller 32, 42 Sub-conveyance path 33, 43 Rotary cutter 33a Rotary blade 33b Blade tip 33c Fixed blade 36, 46 Transport path door 36a, 46a, 56a Knob 37_1, 37_2, 38 Photosensor 50 Cut sheet storage unit 60, 70 Sub-operation unit 61 Size display Unit 62 paper quality display unit 63 remaining amount display unit 64 tip cut instruction button 81 support shaft 81a, 82c gear 82 outer diameter measuring unit 82a disk 82b photo interrupter 100 image forming apparatus 200 paper feeder 300 roll paper 301 tape 5 0 cut sheet

Claims (3)

    [Claims]
  1. A roll paper accommodating section for accommodating a roll paper formed by winding a long sheet, and a paper drawer for unwinding the roll paper accommodated in the roll paper accommodating section while unwinding the roll paper. Means, a cutter for cutting the paper drawn by the paper drawing means, a paper sending means for feeding the paper cut by the paper drawing means and cut by the cutter to a predetermined transport path, and the roll paper storage section And paper preparation means for aligning the leading end of the new roll paper by pulling out the leading end portion of the new roll paper contained therein and cutting it at a predetermined length from the leading end. An outer diameter measuring unit configured to measure an outer diameter of the roll paper stored in the roll paper storage unit, wherein the paper preparation unit is stored in the roll paper storage unit. The length of the new roll paper from the leading end to the cutting position of the new roll paper is determined in accordance with the outer diameter measured by the outer diameter measuring means. apparatus.
  2. 2. A method according to claim 1, wherein the length from the leading end of the new roll paper to the cutting position by the paper preparing means is a predetermined first length corresponding to the outer diameter measured by the outer diameter measuring means, 2. The sheet feeding device according to claim 1, further comprising a selection unit that selects from a predetermined second length independent of the outside diameter measured by the outside diameter measurement unit.
  3. 3. A roll paper accommodating section for accommodating a roll paper formed by winding a long sheet of paper, which is exchangeable, and a paper drawer for unwinding and pulling out the roll paper accommodated in the roll paper accommodating section. Means, a cutter for cutting the sheet drawn by the sheet drawing means, a sheet sending means for sending the sheet drawn by the sheet drawing means and cut by the cutter to a predetermined transfer path, and the predetermined transfer path An image forming means for forming an image on a sheet conveyed via the printer, and a tip for pulling out a leading end portion of the new roll paper accommodated when new roll paper is accommodated in the roll paper accommodating portion. And a paper preparation unit for aligning the leading edge of the new roll paper by cutting the roll paper at a position of a predetermined length from the roll paper storage unit. An outer diameter measuring means for measuring the outer diameter of the roll paper, wherein the paper preparing means according to the outer diameter of the new roll paper accommodated in the roll paper accommodating portion, measured by the outer diameter measuring means. An image forming apparatus for determining a length from a leading end of the new roll paper to a cutting position.
JP11099858A 1999-04-07 1999-04-07 Paper feeder and image forming device Pending JP2000289904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11099858A JP2000289904A (en) 1999-04-07 1999-04-07 Paper feeder and image forming device

Publications (1)

Publication Number Publication Date
JP2000289904A true JP2000289904A (en) 2000-10-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008030307A (en) * 2006-07-28 2008-02-14 Shinko Electric Co Ltd Printer
CN100478265C (en) * 2004-10-27 2009-04-15 诺日士钢机株式会社 Inkjet printer
US7520603B2 (en) 2004-10-27 2009-04-21 Noritsu Koki Co., Ltd. Inkjet printer
JP2009521378A (en) * 2005-12-23 2009-06-04 イーストマン コダック カンパニー Printer with variable guidance advance
JP2013180845A (en) * 2012-02-29 2013-09-12 Katsuragawa Electric Co Ltd Sheet feeder

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100478265C (en) * 2004-10-27 2009-04-15 诺日士钢机株式会社 Inkjet printer
US7520603B2 (en) 2004-10-27 2009-04-21 Noritsu Koki Co., Ltd. Inkjet printer
JP2009521378A (en) * 2005-12-23 2009-06-04 イーストマン コダック カンパニー Printer with variable guidance advance
JP2008030307A (en) * 2006-07-28 2008-02-14 Shinko Electric Co Ltd Printer
JP2013180845A (en) * 2012-02-29 2013-09-12 Katsuragawa Electric Co Ltd Sheet feeder

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