JPH0816047A - Carrying device - Google Patents

Abstract

PURPOSE:To grasp the exact application state of each carrying roller and to exactly grasp the maintenance cycle or the life of each carrying roller by providing the index corresponding to its paper sheet size for every paper sheet to be carried, and by cumulatively memorizing the index to the actually carried paper sheet for every carrying roller, and by determining the timing of replacement from the memorized contents. CONSTITUTION:A control part 130 determines the size of paper sheets housed in each paper feeding cassette from detected results supplied from a switch part 59, paper sheet detecting parts 68, 73, 78, respectively. In copying operation, the control part 130 determines a paper feeding cassette by corresponding to paper sheet size and updates the count value on an application state count area 132c in accordance with the determined result. Namely, when paper feeding carrying for B4-size paper sheets has been determined, the control part 130 reads the index corresponding to the B4 size from a paper sheet size index table 132b, and cumulates the index on each area for a resist roller pair corresponding to the paper feeding cassette on the application state count area 132c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device used in an image forming apparatus such as a copying machine.

[0002]

2. Description of the Related Art In a conventional conveying device used to convey a sheet fed from a sheet feeding cassette such as a copying machine, the life of a conveying roller that conveys the sheet depends on the count value of the number of the fed sheets. It is managed by.

Therefore, for example, when sheets of different sizes are fed from the three sheet feeding cassettes provided in the lower part of the image forming section through the same feeding path, they are provided on the feeding path. There is a drawback that the maintenance cycle cannot be individually grasped for a plurality of transport rollers.

For example, first, second, and third paper feed cassettes are stacked in three stages in order from the top, and the paper fed from the first paper feed cassette is fed to the main body side by the first carrying roller. The sheet that has been conveyed to the main body through the second conveyance roller and the first conveyance roller in order, and is then fed from the third paper feed cassette. The sheet is conveyed to the main body side through the third conveying roller, the second conveying roller, and the first conveying roller in this order.

In this case, the sheets from the first, second, and third sheet feeding cassettes must pass through the first conveying roller without fail, and the sheets from the second and third sheet feeding cassettes must pass through. The paper from the third paper feed cassette passes, and only the paper from the third paper feed cassette passes through the third conveyance roller. In order to convey a size of paper, simply managing the number of sheets
It was not possible to accurately grasp the usage status, and it was not possible to accurately grasp the maintenance cycle and life.

[0006]

SUMMARY OF THE INVENTION As described above, according to the present invention, each sheet is conveyed from a plurality of sheet feeding cassettes using a common conveying path composed of a plurality of conveying rollers. It eliminates the drawback of not being able to know the exact usage status of each roller, and also the accuracy of the maintenance cycle and life of each transport roller. It is an object of the present invention to provide a transport device that can perform the maintenance cycle and life of each transport roller accurately.

[0007]

The transport apparatus of the present invention comprises:
A paper having a size different from that of the paper stored in the first storage means is conveyed by a first transport roller on the paper taken out from the first storage means in which the paper of a predetermined size is stored. In which the sheet taken out from the second storing means in which is stored is transported on the transport path by the second transport roller and the first transport roller, the first count for counting the usage status of the first transport roller. Means, second above
Second counting means for counting the usage status of the transport rollers of the first storage means, when a sheet is taken out from the first storage means and transported, an index corresponding to the size of the sheet stored in the first storage means is set. Corresponding to the paper size stored in the second storage means when the paper is taken out from the first processing means for accumulatively counting by the first counting means and the second storage means and conveyed. The calculated index is the first and second
The second processing means for accumulatively counting the respective counting means.

In the conveying device of the present invention, the paper taken out from the first accommodating means for accommodating the paper of the predetermined size is conveyed by the first conveying roller on the conveying path, and
In which the paper taken out from the second storage means in which the paper having a different size from the paper stored in the storage means is conveyed by the second and first conveyance rollers on the conveyance path. A sheet is taken out from the first storage means for counting the usage status of the first transport roller, a second counting means for counting the usage status of the second transport roller, and transported from the first storage means. At this time, the paper is taken out from the first processing means for accumulating the index corresponding to the paper size stored in the first storage means by the first counting means and the paper is taken out from the second storage means and conveyed. At this time, the first processing means for accumulatively counting the indexes corresponding to the paper sizes stored in the second storage means by the first and second counting means, and the first or second processing means. 2 counting means When the product reaches a predetermined value, and a first or determining means for determining the lifetime of the second conveying roller, corresponding to the first or second counting means.

In the conveying device of the present invention, the sheet taken out from the first accommodating means for accommodating the sheet of the predetermined size is conveyed by the first conveying roller on the conveying path, and the first sheet is conveyed.
The paper taken out from the second storage means in which the paper having a different size from the paper stored in the storage means is transported by the second and first transport rollers on the transport path,
The sheets taken out from the third storing means in which sheets of different sizes from the sheets stored in the first and second storing means are stored by the third, second and first transport rollers. In the case of transporting on a transport path, first counting means for counting the usage status of the first transport roller, second counting means for counting the usage status of the second transport roller, and the third transport roller. And a third counting means for counting the usage status of the first storage means and an index corresponding to the size of the paper stored in the first storage means when the paper is taken out from the first storage means and conveyed. The first processing means for accumulatively counting by the first counting means and the index corresponding to the paper size stored in the second storage means when the paper is taken out from the second storage means and conveyed, First and second counting When the paper is taken out from the second processing means for cumulatively counting in each stage and the third storage means and conveyed, the index corresponding to the size of the paper stored in the third storage means is calculated as above. It is composed of a third processing means for accumulatively counting by each of the first, second and third counting means.

In the conveying device of the present invention, the paper taken out from the first accommodating means for accommodating the paper of a predetermined size is conveyed on the conveying path by the first conveying roller, and the first conveying means is used.
The paper taken out from the second storage means in which the paper having a different size from the paper stored in the storage means is transported by the second and first transport rollers on the transport path,
The sheets taken out from the third storing means in which sheets of different sizes from the sheets stored in the first and second storing means are stored by the third, second and first transport rollers. In the case of transporting on a transport path, first counting means for counting the usage status of the first transport roller, second counting means for counting the usage status of the second transport roller, and the third transport roller. And a third counting means for counting the usage status of the first storage means and an index corresponding to the size of the paper stored in the first storage means when the paper is taken out from the first storage means and conveyed. The first processing means for accumulatively counting by the first counting means and the index corresponding to the paper size stored in the second storage means when the paper is taken out from the second storage means and conveyed, First and second counting When the paper is taken out from the second processing means and the third storing means for cumulatively counting in each stage and conveyed, the index corresponding to the paper size stored in the third storing means is set to the above-mentioned index. When the cumulative value of the third processing means for cumulatively counting by each of the first, second, and third counting means and the first, second, or third counting means reaches a predetermined value, the first, It comprises a judgment means for judging the life of the first, second, or third conveying roller corresponding to the second or third counting means.

In the transporting apparatus of the present invention, when sheets of various sizes are transported by the transporting rollers on the transporting path, the detecting means for detecting the size of the sheet transported by the transporting path, Storage means for storing an index, processing means for reading out an index corresponding to the size of the sheet detected by the detecting means from the storage means when the sheet is conveyed by the conveying path, and cumulatively counting as a use state, And a judgment means for judging the life of the conveying roller when the value cumulatively counted by the processing means reaches a predetermined value.

[0012]

According to the present invention, when the sheets from the sheet feeding cassettes of a plurality of stages are conveyed using a common conveying path composed of a plurality of conveying rollers, an index corresponding to the length of each sheet to be conveyed is calculated. The index of the paper to be actually conveyed is cumulatively stored for each conveying roller, and the replacement time is determined based on the stored contents.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an external appearance of an image forming apparatus unit A to which the conveying apparatus of the present invention is applied, and FIG. 3 schematically shows its internal structure.

The image forming apparatus unit A comprises an electrophotographic copying apparatus 1 as an image forming apparatus and a multi-cassette feeder 2 which is a sheet feeding apparatus on which the electrophotographic copying apparatus 1 is placed.

As shown in FIG. 2, on the upper surface side of the apparatus main body 3 of the electrophotographic copying apparatus 1, a document glass 4 as a document placing table is arranged, and an operation panel 5 is arranged along the front edge. It is arranged. A document pressing cover 6 is rotatably attached to the rear edge of the upper surface so that the document D placed on the document glass 4 can be pressed.

On the right side surface of the apparatus main body 3, a manual feed guide 7 is provided.
A cassette mounting portion 8 for mounting an optional paper feeding cassette is provided below this. A copy receiver 9 is attached to the left side surface of the apparatus body 3. A sorter may be attached instead of the copy receiver 9.

The multi-cassette feeder 2 is composed of a lower unit 2A and an upper unit 2B, and the lower unit 2A has first to third members which can be drawn out to the front side.
Paper feed cassettes 15, 16 and 17 are incorporated. A lower side cover 18 for maintenance is provided on the right side surface of the lower unit 2A,
Upper side cover 19 for maintenance on the right side of B
Is provided. First to third paper feed cassette 1
5, 16, 17 can be taken out from the main body of the electrophotographic copying apparatus 1.

The image forming means 12 is constructed as follows. That is, as shown in FIG. 3, the photosensitive drum 2 serving as an image bearing member is provided substantially in the center of the apparatus main body 3.
5 is rotatably provided.

Around the photosensitive drum 25, a charging device 26 and an LED are provided along the rotation direction (direction of arrow a).
An erasing array 27, a developing device 28, a transfer device 29, a peeling device 30, a cleaning device 31, and a charge eliminating device 32 are sequentially arranged. Furthermore, in the upper part inside the device main body 3,
Between the LED erasing array 27 and the developing device 28, an optical system moving type exposure device 33 for exposing the image information of the document D set on the document glass 4 is provided.

The exposure device 33 includes a fluorescent lamp 34, mirrors 35, 36, 37, 38, 39, 40, and an imaging lens 4.
1, a fluorescent lamp 34, a first carriage 42 on which the mirrors 35, 36 and 37 are mounted, and a second carriage 43 on which the mirrors 38 and 39 are mounted. The first carriage 42 and the second carriage 43 are configured to move at a relative speed of 2: 1 when scanning a document.

As a result, the document D placed on the document glass 4 is illuminated by the fluorescent lamp 34, and its reflected light is reflected by the mirrors 35, 36 and 37, the imaging lens 41, and the mirrors 38, 39 and 40. The light is focused on the photoconductor drum 25 via the light.

Further, in the apparatus main body 3, the paper feed cassette 46 mounted in the cassette mounting portion 8 or the paper P automatically fed from the multi-cassette feeder 2 or the manual paper feed from the manual feed guide 7. A paper transport path 48 is formed for guiding the paper P to the copy receiver 9 via the image transfer portion 47 between the transfer device 29 and the photoconductor drum 25.

A pair of registration rollers 49 as an aligning unit is arranged on the paper transport path 48 upstream of the image transfer unit 47, and on the downstream side of the image transfer unit 47. The fixing device 50 and the discharge roller pair 51 are arranged.

It should be noted that the above-mentioned devices constituting the image forming means 12 are not directly related to the present invention, and therefore detailed description thereof will be omitted. However, the image forming means 12 is adapted to perform image forming processing in different cycles depending on the paper size.

Further, the downstream end of the paper feed / transport path 52 for transporting the paper P fed from the multi-cassette feeder 2 joins the upstream side of the registration roller pair 49.

A paper detection switch 53 and a manual paper feed roller 54 are disposed between the manual paper feed guide 7 and the registration roller pair 49. A pickup roller 55, a paper feed roller 56, a separation roller 57, etc. for taking out the paper P in the paper feed cassette 46 are arranged corresponding to the cassette mounting portion 8.

Next, the structure of the multi-cassette feeder 2 will be described with reference to FIG. Lower unit 2A
The cassette accommodating portions 60, 61, 62 are formed in three stages, and as described above, the three paper feeding cassettes 15, 16, 17 are accommodated on the entire surface side so as to be freely drawn out.

Then, for example, the lower sheet feeding cassette 15
Is a B4 size sheet of paper P, a middle sheet feeding cassette 16 is an A4 size sheet P, and an upper sheet feeding cassette 17 is B5.
A size P of paper is accommodated.

Further, at the right side portion in the lower unit 2A and the upper unit 2B, there is formed a paper feed / transport path 52 for transporting the paper P taken out from each of the paper feed cassettes 15 to 17 upward. ing.

A terminal end portion 52a of the paper feeding / transporting path 52 is a starting end portion 63a of a paper feeding / passing path 63 formed so as to join the upstream side of the paper feeding / transporting path 48 formed in the electrophotographic copying machine 1.
Is connected to.

The pickup roller 64 and the paper feed roller 6 are provided near the mounting position of the lower paper feed cassette 15.
5, a separation roller 66, an elevator 67, a paper size detection unit 68, and the like are arranged.

A pickup roller 69, a paper feed roller 70, a separation roller 71, an elevator 72, a paper size detection unit 73, etc. are arranged near the mounting position of the middle paper feed cassette 16.

A pickup roller 74, a paper feed roller 75, a separation roller 76, an elevator 77, a paper size detection unit 78, etc. are arranged near the mounting position of the upper paper feed cassette 17.

The paper size detecting units 68, 73, 78
Have the same structure as the claw portion 58 of the paper feed cassette 46 and the switch portion 59 of the cassette insertion portion 8, respectively. Further, the paper feeding / conveying path 52 has a plurality of guide plates 79.
Are formed between the mutually facing surfaces. A registration roller pair (conveying roller) 80 is provided in the upstream portion of the paper feeding / conveying path 52 as a means for aligning and conveying which aligns and conveys the paper P taken out from the lower paper feeding cassette 15. There is. Further, in the midstream portion of the paper feed transport path 52, alignment transport for aligning and transporting the paper P taken out from the middle paper feed cassette 16 and transporting the paper P taken out from the lower paper feed cassette 15 is performed. A pair of registration rollers (conveyance rollers) 81 is provided as a dual-purpose means. Further, on the downstream side of the paper feed transport path 52, the paper P taken out from the upper paper feed cassette 17 is aligned and transported, and the paper taken out from the middle paper feed cassette 16 and the lower paper feed cassette 15 is placed. A pair of registration rollers (conveying rollers) 82 is arranged as means for aligning and conveying which also conveys P.

FIG. 4 shows the operation panel 5.
On the right portion of the operation panel 5, a clip tray 90 for placing clips and the like, and a copy key 9 used for making a copy
1. Numeric keypad 92 used to set the number of copies to be copied, interrupt key 93 used to make an interrupt copy during continuous copying, and residual heat key 9 for preheating
4, an all clear key 95 used to return all copy modes to the standard mode, and a clear / stop key 96 used to correct the number of copies or to stop copying halfway .

On the left side of these arrangement positions and on the right side of the central portion of the operation panel 5, a copy number display section 97 for displaying the number of copies set by the ten keys 92, a message for displaying the operating procedure and the state of the machine in characters. Display unit 98,
Operation guide key 9 to use when you do not understand the operation procedure
9. Color counter 100 used to confirm the number of color copies, magnification display section 101 for displaying the selected magnification, memory set key 102 used when setting or calling the copy mode, automatic Automatic exposure key 103 used to switch between exposure and manual exposure, exposure slide knob 104 used to change the copy density during manual exposure, zoom key 105 used to increase the magnification, when making equal-sized copies There is provided a 100% key 106 used for the zoom control and a zoom key 107 used for reducing the magnification.

On the left side of the central portion of the operation panel 5, the automatic paper selection key 109 used when setting the automatic paper selection mode, the automatic magnification selection key 110 used when setting the automatic magnification selection mode, and the original setting direction are set. An original direction display lamp 111 that is lit, a paper size key 112 used when selecting a copy size, and a paper size indicator 112a that displays selection of the paper size key 112,
The original size key 113 used to select the original size, and the original size key 113 in which the magnification is automatically set, and the original size indicator 113 for displaying the selection of the original size key 113
a, cassette selection key 114 used when switching cassettes, copy color display section 1 for displaying color copy
15 and a display panel 1 for displaying the operating state of the copying machine
16 are provided.

Further, on the left part of the operation panel 5, a frame erase key 117 used to erase the frame around the document,
A page continuous shooting key 118 used when copying two-page originals such as a double-page spread page at the same time, a total counter 119, an edit key 120 used when trimming or maxing, and a binding used when a binding margin is required. A substitute key 121 and a sort / group key 122 used when setting the sort mode and the group mode are provided.

FIG. 1 shows a control circuit. That is, the control unit 130 that controls the whole is provided. The control unit 130 includes a ROM 131 that stores a control program, a RAM 132 that stores various data and tables, an operation panel 5, and a pulse motor that is used to move the first and second carriages 42 and 43. Drive circuit 134 for driving the scanning motor 133, drive circuit 136 for driving the main motor 135 used for rotation of the photosensitive drum 25, drive circuit 141 for driving the transport system 140 such as the paper transport path 48, and switch section 59. The paper size detectors 68, 73, 78 are connected.

The RAM 132 is provided with a paper size table 132a, a paper size index table 132b, and a conveyance roller usage status count area 132c.

In the paper size table 132a, the corresponding paper feed cassettes 46, 15 and 1 supplied from the switch unit 59 and the paper size detection units 68, 73 and 78, respectively.
The sheet size corresponding to the detection result of the projection of the claw portion (not shown) obtained by the setting of 6 and 17 is stored.

The paper size index table 132b stores an index (count increment) for each paper size based on, for example, the B5 size. For example, as shown in FIG. 5, the paper size is B5 (portrait; 1
82 mm), the index becomes "10", and in the case of A4 (portrait; 210 mm), the index becomes "12" and B5.
In the case of -R (horizontal placement; 257 mm), the index is "14", in the case of A4-R (horizontal placement; 297 mm), the index is "16", and in the case of B4 (vertical placement; 364 mm),
The index is "20", and in the case of A3 (vertical placement; 420 mm), the index is "23".

For example, in the case of A3 size, the length is 42
It is 0 mm, and the standard length of B5 size is 182 m.
Since m is m, the index for the A3 size is calculated as (420/182) × 10 = 23.

This is obtained by dividing each size by the B5 size and multiplying by 10 to obtain an integer. In the usage status count area 132c, the usage status for each of the transport rollers is stored by accumulating the index corresponding to the above-described paper size. For example, as shown in FIG. 6, registration roller pairs 80, 81, 82 are stored. ,
The usage status for 49 is stored.

The RAM 132 is adapted to be supplied with a power supply voltage by a battery (not shown) even when the power supply is cut off. Further, it may be configured by an EEPROM.

Further, "100,000 points" is set as the life of the roller in the RAM 132, and when the count value of the usage status count area 132c becomes "100,000", the control unit 130 responds. The time (life) of replacement of the roller is determined, and the content is displayed on the message display unit 98.

Next, the paper feeding operation in such a structure will be described with reference to the flow chart shown in FIG.
First of all, the control unit 130 controls the claws (not shown) obtained by setting the corresponding paper feed cassettes 46, 15, 16, 17 supplied from the switch 59 and the paper size detectors 68, 73, 78, respectively. The size of the paper stored in each of the paper feed cassettes 46, 15, 16, and 17 is determined based on the detection result of the protrusion. For example, when the B4 size paper P is stored in the paper feed cassette 15, the paper feed cassette 1
A4 size paper P is stored in the paper feed cassette 17
It is determined that the B5 size paper P is stored in the paper tray and the A3 size paper P is stored in the paper feed cassette 46.

For example, the copy key is input after the number of sheets, original size, and paper size are set. A copy operation is performed by this input. At this time, the control unit 130 determines the paper feed cassette (46, 15, 16, 17) in which the corresponding paper is stored according to the paper size,
In accordance with the result of this judgment, the usage status count area 132c
Update the count value of.

That is, when it is judged that the B4 size paper P stored in the paper feed cassette 15 is fed,
The control unit 130 reads the index "20" for the B4 size from the paper size index table 132b, and registers the registration roller pair 80, 81 in the usage status count area 132c.
The index “20” is cumulatively added to each area for 82 and 49.

When it is determined that the A4 size paper P stored in the paper feed cassette 16 is fed and conveyed, the control unit 130 determines from the paper size index table 132b to A4 size.
The index "12" for the size is read out, and the registration roller pair 81, 82, 49 of the usage status count area 132c is read.
The index “12” is cumulatively added to each area for.

When it is determined that the B5 size paper P stored in the paper feed cassette 17 is fed and conveyed, the control unit 130 determines from the paper size index table 132b to B5.
The index "10" for the size is read, and the index "10" is cumulatively added to the area for the registration roller pair 82, 49 in the usage status count area 132c.

When it is determined that the A3 size paper P stored in the paper feed cassette 46 is fed and conveyed, the control unit 130 determines from the paper size index table 132b to A3 size.
The index "23" for the size is read, and the index "23" is cumulatively added to the area of the usage status count area 132c for the registration roller pair 49.

When the storage content of the usage status count area 132c is updated, the control unit 130 sets the value to "1".
If it reaches "100,000", it is judged that it is time to replace the registration roller pair whose count value has reached "100,000", and the message display section At 98, a guidance display is displayed indicating that it is time to replace the registration roller pair. In this case, “15” is displayed for the registration roller pair 80, “20” is displayed for the registration roller pair 81, and “2” is displayed for the registration roller pair 82.
"5" is displayed, and if the registration roller pair 49 is "30"
Is displayed.

Then, in response to the guide of the replacement time, the clerk called by the user, after replacing the roller with a new one, presses the "0" key and the "8" key,
When the power switch (not shown) is turned on, the maintenance mode is entered. With the "3" key and "1" key pressed, the copy key is turned on to display the current count value in the message display section 98. Is displayed. Then, by pressing the "0" key and the interrupt key, the current count value in the usage status count area 132c is updated to "0", and "0" is displayed on the message display unit 98.

After that, the maintenance mode is released by pressing the "0" key and the "9" key at the same time.
As described above, an index corresponding to the length of each sheet to be conveyed is given, and the index for the sheet actually conveyed is cumulatively stored for each conveying roller, and the replacement time is determined based on the stored contents. It is a thing.

As a result, it is possible to accurately grasp the usage state of each of the transport rollers, and also to accurately determine the maintenance cycle (replacement time) and life of each of the transport rollers.

[0057]

As described above in detail, according to the present invention, in each of the plurality of sheet feeding cassettes, the sheet is conveyed using a common conveying path composed of a plurality of conveying rollers. It is possible to provide a transport device that can accurately determine the usage state of the transport roller and that can accurately determine the maintenance cycle and life of each transport roller.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a control circuit of a copying machine according to an embodiment of the present invention.

FIG. 2 is an external view showing a schematic configuration of a copying machine.

FIG. 3 is an internal configuration diagram showing a schematic configuration of a copying machine.

FIG. 4 is a diagram for explaining an operation panel.

FIG. 5 is a diagram showing a storage example of a paper size index table.

FIG. 6 is a diagram showing an example of storage of a usage status count area.

FIG. 7 is a flowchart illustrating a paper feeding operation.

[Explanation of symbols]

 5 ... Operation panel 15, 16, 17, 46 ... Paper feed cassette P ... Paper 49, 80, 81, 82 ... Registration roller pair 52 ... Paper feed transport path 130 ... Control unit 132 ... RAM 132a ... Paper size table 132b ... Paper Size index table 132c ... Usage count area

Claims (5)

[Claims] 1. A first unit for storing sheets of a predetermined size.
From the second storage means in which the paper taken out from the storage means is transported on the transport path by the first transport roller, and the paper having a different size from the paper stored in the first storage means is stored. A transport device for transporting the ejected paper on the transport path by means of a second transport roller and a first transport roller, which counts the usage status of the first transport roller.
Second counting means and a second counting means for counting the usage status of the second transport roller.
When the paper is taken out from the first storing means and conveyed, the index corresponding to the size of the paper stored in the first storing means is cumulatively counted by the first counting means. When the paper is taken out from the first processing means and the second storage means and conveyed, the indices corresponding to the size of the paper stored in the second storage means are calculated as the first and second indexes. And a second processing unit for accumulatively counting by each counting unit. 2. A first storage unit for storing sheets of a predetermined size.
From the second storage means in which the paper taken out from the storage means is transported on the transport path by the first transport roller, and the paper having a different size from the paper stored in the first storage means is stored. A transport device for transporting the ejected paper on the transport path by means of a second transport roller and a first transport roller, which counts the usage status of the first transport roller.
Second counting means and a second counting means for counting the usage status of the second transport roller.
When the paper is taken out from the first storing means and conveyed, the index corresponding to the size of the paper stored in the first storing means is cumulatively counted by the first counting means. When the paper is taken out from the first processing means and the second storage means and conveyed, the indices corresponding to the size of the paper stored in the second storage means are calculated as the first and second indexes. Second processing means for accumulatively counting by the respective counting means, and a second processing means corresponding to the first or second counting means when the cumulative value of the first or second counting means reaches a predetermined value. 1 or a determining means for determining the life of the second transport roller, and a transporting device. 3. A first unit for storing sheets of a predetermined size.
From the second storage means in which the paper taken out from the storage means is transported on the transport path by the first transport roller, and the paper having a different size from the paper stored in the first storage means is stored. The taken-out sheet is conveyed on the conveying path by the second and first conveying rollers, and a third sheet in which a sheet different in size from the sheets stored in the first and second storing means is stored. In a transport device for transporting a sheet taken out from a storage means by means of a third, a second, and a first transport roller on the transport path, a first usage count for the first transport roller is counted.
Second counting means and a second counting means for counting the usage status of the second transport roller.
And a third counting means for counting the usage status of the third transport roller.
When the paper is taken out from the first storing means and conveyed, the index corresponding to the size of the paper stored in the first storing means is cumulatively counted by the first counting means. When the paper is taken out from the first processing means and the second storage means and conveyed, the indices corresponding to the size of the paper stored in the second storage means are calculated as the first and second indexes. Second processing means for accumulatively counting by each counting means and an index corresponding to the size of the paper stored in the third storing means when the paper is taken out from the third storing means and conveyed. And a third processing means for accumulatively counting by the first, second, and third counting means, respectively. 4. A first unit for storing sheets of a predetermined size.
From the second storage means in which the paper taken out from the storage means is transported on the transport path by the first transport roller, and the paper having a different size from the paper stored in the first storage means is stored. The taken-out sheet is conveyed on the conveying path by the second and first conveying rollers, and a third sheet in which a sheet different in size from the sheets stored in the first and second storing means is stored. In a transport device for transporting a sheet taken out from a storage means on the transport path by means of third, second, and first transport rollers, a first counting the usage status of the first transport roller.
Second counting means and a second counting means for counting the usage status of the second transport roller.
And a third counting means for counting the usage status of the third transport roller.
When the paper is taken out from the first storing means and conveyed, the index corresponding to the size of the paper stored in the first storing means is cumulatively counted by the first counting means. When the paper is taken out from the first processing means and the second storage means and conveyed, the indices corresponding to the size of the paper stored in the second storage means are calculated as the first and second indexes. Second processing means for accumulatively counting by each counting means and an index corresponding to the size of the paper stored in the third storing means when the paper is taken out from the third storing means and conveyed. A third processing means for accumulatively counting by each of the first, second, and third counting means, and when the cumulative value of the first, second, or third counting means reaches a predetermined value, First, second corresponding to the first, second or third counting means Or a determining means for determining the life of the third conveying roller, and a conveying device. 5. A conveying device in which sheets of various sizes are conveyed on a conveying path by conveying rollers, and a detecting means for detecting the size of the sheet conveyed by the conveying path, and the index for each size of the sheet is stored. And a processing means for reading out an index corresponding to the size of the sheet detected by the detecting means from the storing means when the sheet is conveyed by the conveying path and accumulatively counting as a use state. A transport device comprising: a determination unit that determines the life of the transport roller when the value cumulatively counted by the processing unit reaches a predetermined value.