JPH0648649A - Conveyance processing device for recording material of image forming device - Google Patents

Abstract

PURPOSE:To prevent a magazine from erroneous loading due to inability to discriminate a discrimination mark by providing the two discrimination marks in the vicinity of the final end of a recording material, measuring its drawn out length in the point of time of detecting the first discrimination mark, and controlling a draw out means and a cutting means in accordance with a measuring result of the drawn out length. CONSTITUTION:In an image forming device, a sensitive material 15 stored in a sensitive material magazine 13 is successively drawn out by paired conveying rollers 39, and the material 15, after cut into a predetermined length by a cutter 17, is conveyed to a side of an exposure part 19. Two discrimination marks with a predetermined length apart in the lengthwise direction in the vicinity of a final end of the sensitive material 15 are provided. When the first discrimination mark is detected by a sensor, a drawn out length L in the point of time of this detection is compared with a rated length SL, to immediately cut the material, in the case of a relation where L=SL, and on the other hand, to draw out the first discrimination mark to a cutter position in the case of a relation where L<SL. When the drawn out length L in this point of time is conveyable length ML or more, the material is immediately cut, and on the other hand when a relation is L<ML, cut by drawing out the second discrimination mark to the cutter position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for forming an image on a recording material, and more particularly to a recording material conveying / processing apparatus of an image forming apparatus for carrying out recording material conveying processing.

[0002]

2. Description of the Related Art As is well known, an image forming apparatus has a recording material conveyance processing device for conveying a recording material such as a photosensitive material. The recording material conveyance processing device pulls out the recording material contained in a state of being wound in a magazine for a predetermined length, cuts the recording material, and conveys the cut recording material to a predetermined position via a conveyance path. Then, when the recording material reaches a predetermined position, an image forming process is performed.

During the above image formation, the power supply to the apparatus may be cut off due to an unexpected situation such as a power failure or an accident.
After that, when the restoration process is performed and the power is supplied, the image forming apparatus is set to the initial state and the image forming process is performed from the beginning. At this time, if the recording material that has already been pulled out from the predetermined standby position is used, it is difficult to control the image forming processing, and therefore it is necessary to cut and discharge the recording material. When the restoration process is performed, the image forming apparatus detects whether the recording material is pulled out from the standby position, and when it is pulled out, further pulls out the transportable length or more of the image forming apparatus, cuts it, and discharges it. I have to. This is to prevent the occurrence of the jam because the jam occurs when the recording material to be discharged is too short.

An identification mark for identifying the end of the recording material is formed near the end of the recording material. When the identification mark is detected, the image forming apparatus cuts the recording material at the position of the identification mark and ejects the recording material, and also makes the operator recognize that the recording material has reached the end.

[0005]

As described above, when the power supply to the image forming apparatus is cut off and then the power is supplied again by the restoration process, regardless of the length of the recording material pulled out. Further, if the sheet is pulled out for more than the transportable length, cut, and discharged, the recording material discharged may be too long. That is, it is good when the recording material is pulled out slightly from the initial position, but when a considerable amount is pulled out from the initial position, if the recording material is pulled out more than the transportable length, the recording material longer than the required length is discharged. It may cause a jam instead.

Further, when the recording material is to be cut at the identification mark position formed near the end of the recording material, it is not always possible to cut at the identification mark position because the transportable length must be taken into consideration. In such a case, since the identification mark cannot be used for identification, a magazine with a small amount of remaining recording material may be erroneously reloaded, which may cause a jam.

Therefore, the present invention has been made in view of the above circumstances, and when the recording material is pulled out from a predetermined position when the power supply of the image forming apparatus is cut off and then the power supply is started. The recording material can be reliably discharged in consideration of the length of the recording material, and the recording material can be securely cut at the position of the identification mark formed near the end of the recording material to avoid a conveyance obstacle. An object is to provide a processing device.

[0008]

According to the present invention, visible first and second identification marks are formed in the vicinity of the terminal end along the pull-out direction at least at a transportable length and wound in a roll shape. A recording material, a drawing-out means for drawing out the recording material, an identification mark detecting means for detecting the identification mark, a cutting means arranged downstream of the identification mark detecting means for cutting the recording material, and Measuring means for measuring the pull-out length of the recording material with reference to the cutting means,
Comparable means for comparing the transportable length, at least the standard length having the transportable length, and the pullout length, and the pullout means and the cutting means based on the outputs of the identification mark detection means and the comparison means. First control means for driving and controlling the first and second control means, respectively, when the withdrawal length is less than the standard length when the first identification mark is detected by the identification mark detecting means. Drives the pull-out means to pull out the first identification mark to the position of the cutting means. At that time, if the pull-out length is equal to or longer than the transportable length, the first control means causes the cutting means to move. When the recording material is driven to cut the recording material at the position of the first identification mark and the pull-out length is less than the transportable length,
The first control means drives the pull-out means to pull out the second identification mark to the position of the cutting means and drives the cutting means to cut the recording material at the position of the second identification mark. And a magazine loading detection means for detecting a loading state of a magazine which contains the recording material and is detachably mountable in the image forming apparatus; a magazine replacement detection means for detecting that the magazine has been replaced; The recording material is arranged downstream of the drawing means in the drawing direction and at a position corresponding to the first and second identification marks, and the presence or absence of the recording material is discriminated to detect the tip of the recording material or the first and second identification marks. The recording material detecting means, the magazine loading detecting means, the magazine replacement detecting means, and the recording material detecting means based on the respective detection results. And a second control means for,
When the magazine loading detection unit detects the loading of the magazine when the power of the image forming apparatus is turned on, or when the magazine replacement detection unit detects the replacement of the magazine, the second control unit operates as described above. The drawing means is driven so as to draw the recording material to the detection position of the recording material detecting means, and when it is determined that the recording material is absent, the occurrence of a jam or the arrival of the end of the recording material is recognized. A first recording material detection unit which is arranged downstream of the drawing unit in the drawing direction and detects the leading edge of the recording material by determining the presence or absence of the recording material; and a downstream direction of the drawing direction from the first recording material detection unit. The first and second identification marks are arranged at positions corresponding to the first and second identification marks, and the presence or absence of the recording material is determined to detect the first and second identification marks. Second recording material detecting means, magazine loading detecting means, magazine replacement detecting means, and first and second recording material detecting means based on the respective detection results, the drawing means is driven and controlled. A third control unit, and when the magazine loading detection unit detects loading of the magazine when the image forming apparatus is turned on, or when the magazine replacement detection unit detects replacement of the magazine. The third control means drives the drawing means so as to draw the recording material to the detection position of the first recording material detecting means,
When the first recording material detection unit determines that the recording material is present, the drawing unit is driven to further draw the recording material to the detection position of the second recording material detection unit, When the recording material detection means of No. 2 determines that the recording material is absent, or when the first recording material detection means determines that the recording material is absent, the end of the recording material or a jam is detected. Further, it is possible to recognize the occurrence of the recording material, and a drawing-out means for drawing out the recording material which is wound in a roll shape and accommodated therein, a cutting means for cutting the drawn-out recording material, and a drawing-out length of the drawn-out recording material. Measuring means for measuring the measurement result with reference to the disconnecting means, storage means for storing and holding the measurement result of the measuring means even when the power supply to the image forming apparatus is cut off, and the drawer. And a control means for comparing the drawing means and the cutting means based on the comparison result of the comparison means, and the power supply to the image forming apparatus is cut off. When the recording material is pulled out from the cutting means and the pull-out length is equal to or longer than the transportable length when the power is supplied again later, the control means drives the cutting means to cut the recording material. When the pull-out length is less than the transportable length, the pulling-out means is driven to pull out the recording material until the pull-out length becomes at least the transportable length, and the cutting means is driven to cut the recording material. The cut recording material can be discharged.

[0009]

According to the above-mentioned means, when the recording material is pulled out to the required length and reaches the vicinity of the end and the first identification mark is detected, first the pull-out length is compared with the standard length at the detection position of the first identification mark. If the pull-out length is less than the standard length, the first identification mark is further pulled out to the cutting means position. After pulling out, the pull-out length is further compared with the transportable length, and if the pull-out length is longer than the transportable length, cut at the first identification mark position, and if the pull-out length is less than the transportable length, the first identification mark The second identification mark following is drawn to the cutting means position and cut. Thus, the pull-out length is always longer than the transportable length and is cut.

Further, when the power supply of the image forming apparatus is turned on, it is discriminated whether the magazine is loaded or exchanged, and when the magazine is loaded or exchanged, the recording material is pulled out, and thereafter, the leading edge of the recording material or the first and second identification marks are displayed. The presence or absence of the recording material is determined by the detecting means for detecting. When the recording material is not detected, the occurrence of a jam or the arrival of the end of the recording material is recognized.

Further, when the power supply of the image forming apparatus is turned on, it is discriminated whether the magazine is loaded or replaced, and when the magazine is loaded or replaced, the recording material is pulled out, and thereafter, the recording material is detected by the detecting means for detecting the leading edge of the recording material. The presence or absence of is determined. When the recording material is not detected, the occurrence of a jam is recognized, and when the recording material is detected, the recording material is further pulled out, and thereafter, the recording means detects the first and second identification marks. The presence or absence of material is determined. When the recording material is not detected, the arrival of the end of the recording material is recognized.

Further, even if the power supply to the apparatus is cut off, the pull-out length is stored and held, and when the power supply to the apparatus is cut off during image formation and then the power supply is started by the restoration process, it is already Considering the pulled-out length, the recording material is always cut with a length equal to or longer than the transportable length.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a conveyance processing device that constitutes an image forming apparatus. A photosensitive material magazine 13 is arranged in the main body 11, and in the photosensitive material magazine 13, the photosensitive material 15 is wound and stored in a roll shape. The photosensitive material 15 drawn from the photosensitive material magazine 13 is the cutter 1.
It is cut to a predetermined length by 7 and then conveyed to the exposure unit 19.

Reflected light from a reflection light source unit 21 for irradiating a light reflection type document is guided to the exposure unit 19, and the reflection light source unit 21 scans the document placed on the mounting table 23 in the direction of the arrow. By doing so, the photosensitive material 15 is scanned and exposed.
The scanning exposed photosensitive material 15 is conveyed to the water coating section 21. The exposed photosensitive material 15 is coated with water in the water coating section 21 and conveyed to the thermal development transfer section 23.

Further, a receiving material magazine 25 is arranged in the main body 11, and the receiving material 2 is placed in the receiving material magazine 25.
7 is rolled up and stored. The receiving material 27 drawn out from the receiving magazine 25 is cut into a predetermined length by a cutter 29 and then conveyed to the heat development transfer section 23. The photosensitive material 15 and the receiving material 27 conveyed to the heat development transfer section 23 are overlapped with each other to transfer the heating phenomenon. The heat development transfer unit 23 is composed of a heating drum 33 having a heating element 31 built therein and an endless pressure contact belt 35. Overlapping photosensitive material 15 and receiving material 27
Is pressed against the outer circumference of the heating drum 33 by the endless pressure contact belt 35, and is nip-conveyed on the peripheral surface of the heating drum 33 in an overlapping state to be transferred by thermal development.

After the heat development transfer, the photosensitive material 15 and the receiving material 27 are separated, the photosensitive material 15 is sent to the waste photosensitive material storage box 37, and the receiving material 27 is accumulated in the tray 38. Further, the photosensitive material 15 and the receiving material 27 have a plurality of conveying roller pairs 39 arranged at predetermined positions and at predetermined intervals.
Is driven to rotate and is pulled out from each magazine and is conveyed to a predetermined position while being sandwiched.

In the carrying processing apparatus shown in FIG. 1, a pair of carrying rollers 39 for drawing the photosensitive material 15 and the receiving material 27 from each magazine are provided upstream of the cutters 17 and 29 in the drawing direction. The conveying roller pair 39 is composed of, for example, a pulse motor and is drive-controlled by a pulse signal. By controlling the driving of the pair of transport rollers 39, the drawing length L of the recording material drawn from each magazine can be controlled.

When the power supply to the apparatus is cut off due to an unexpected situation such as a power failure or an accident during the image formation, and then the power supply is restarted, the pair of transport rollers 39
Is controlled in accordance with the drawing length L of the recording material that has already been drawn. In the following, with reference to FIGS. 2 and 3, the recovery process after the start of the power supply in the recording material transport process will be described based on the photosensitive material 15.

FIG. 2 shows a block diagram of an apparatus for controlling the restoration process. The pulse generator 41 generates a pulse for driving and controlling the conveying roller pair 39 composed of a pulse motor. The pulse output of the pulse generator 41 is supplied to the counter 43. The counter 43 counts the number of pulses supplied and supplies the count value to the nonvolatile memory 45. The count value is pull-out length data of the photosensitive material 15 pulled out with the cutter 17 shown in FIG. 1 as a reference.

Since the conveying roller pair 39 is provided between the cutter 17 and the photosensitive material magazine 13, the conveying roller pair 39 is drawn out based on the number of pulses and the cutter 17 which are actually drawn from the conveying roller pair 39. The number of pulses corresponding to the extraction length L is different. Therefore, from the number of pulses counted with the transport roller pair 39 as a reference, the transport roller pair 39 and the cutter 1 are
The count value is obtained by subtracting the number of pulses corresponding to the distance from 7.

The count value is stored in the non-volatile memory 45. The stored data is a count value and data indicating whether or not the photosensitive material 15 is pulled out from the cutter 17. Data indicating whether or not the photosensitive material 15 is pulled out is obtained by setting a flag of the nonvolatile memory 45. The nonvolatile memory 45 holds the stored data even after the power supply is cut off. Therefore,
When the power supply to the image forming apparatus is cut off and then the power supply is started, the material is processed based on the data stored and held in the nonvolatile memory 45. That is, the data of the non-volatile memory 45 is supplied to the code judging unit 47 and the comparator 49, and the control unit 51, based on the outputs of the code judging unit 47 and the comparator 49, the pulse generator 41, the counter 43, the non-volatile memory 45, Cutter 17 and display 53
To control.

Further description will be made with reference to FIG. FIG. 3 shows a flow chart of the restoration process. When the power supply to the image forming apparatus is cut off, and then the power supply is started (S1), the code determination unit 47 determines the flag state of the non-volatile memory 45 and determines whether the photosensitive material 15 is pulled out. (S2). When it is determined that the photosensitive material 15 is pulled out, the pull-out length L is compared with the preset predetermined length ML by the comparator 49 (S3). The predetermined length ML is at least the photosensitive material 1 that can be conveyed by the image forming apparatus.
The length is 5, which is the minimum value in this case.

When it is determined that ML≤L, the contents of the non-volatile memory 45 are erased (S5), and the cutter 17
Thus, the photosensitive material 15 is cut (S6). At the time of disconnection, the counter 43 is reset. The cut photosensitive material 15 is conveyed to a predetermined position and discharged. The discharge instruction is displayed on the display unit 53 (S7). ML ≦ L
If not, the controller 51 drives the pulse generator 41 to control the conveying roller pair 39 to further draw out the recording material (S4). The counter 43 continues counting, and then the drawing length L and the predetermined length ML are compared again (S3).

After performing the above processing, the restoration processing is ended (S8). Also, when it is determined that the material has not been pulled out (S2), the restoration process is ended (S8). As described above, when the power supply to the image forming apparatus is cut off and then the power supply is started, processing is performed according to the length of the photosensitive material 15 that has already been pulled out. That is, when the drawing length L of the photosensitive material 15 drawn out with reference to the cutter 17 is equal to or longer than the minimum conveying length ML, the photosensitive material 15 is cut and discharged at that time, and the drawing length L is set to the minimum conveying length. When the length is less than ML, the photosensitive material 15 is further drawn out until the pull-out length L becomes equal to or longer than the minimum transport length ML, and then the photosensitive material 15 is cut to be discharged. As a result, the photosensitive material 15 will not be cut with a length less than the minimum transport length, so that the photosensitive material 15 is reliably transported to a predetermined position and discharged.

On the other hand, on the photosensitive material 15 and the receiving material 27, identification marks having a size that can be easily visually observed are formed near the end of each material, and a predetermined amount of each material is pulled out to detect the identification mark. Then, the image forming apparatus performs the termination process of the recording material process. Hereinafter, description will be given based on the termination process of the photosensitive material 15 with reference to FIG. FIG. 4 shows a state near the end of the recording material. As shown in FIG. 4A, the photosensitive material 15 pulled out from the magazine 13
Near the end of the identification mark 61a through a predetermined length ML,
b is formed, and the identification marks 61a and 61b each have a length b in the pull-out direction. The predetermined length ML is at least the minimum length at which the image forming apparatus can convey the recording material.
In this embodiment, the identification marks 61a and 61b are formed by holes, but it is conceivable to form colored regions in addition to the holes.

As described above, the recording material conveying / processing device is provided with the cutter 17 for cutting the photosensitive material 15, and the identification mark 61 which is arranged upstream of the cutter 17 in the drawing direction.
It has a sensor 63 for detecting a and b. Hereinafter, each relationship between the sensor 63 and the cutter 17 and the identification marks 61a and 61b when the identification mark 61a is detected will be described. When the photosensitive material 15 is pulled out from the magazine 13 by the required length and reaches the vicinity of the end, first, the identification mark 61 a is detected by the sensor 63.

The position of the sensor 6 is located at a distance a from the leading end of the identification mark 61a having a length b in the pulling-out direction.
At the detection position of 3, the pull-out length L of the photosensitive material 15 pulled out with the cutter 17 as a reference and the retreat length BL from the cutter 17 to the sensor 63 are set. In each dimension, the length b in the drawing direction is 40 mm, and the distance a from the leading end of the identification mark in the drawing direction is 20 mm.

The photosensitive material 15 is conveyed by the conveying roller pair 39 and is always cut at either one of the identification marks 61a and 61b as shown in FIGS. 4 (b) and 4 (c). An identification mark piece 62 is formed on the cut photosensitive material 15. When the identification marks 61a and 61b are formed of holes, the identification mark piece 62 is a cutout piece. The cutting process is set by the value of the drawing length L when the identification mark 61a is detected by the sensor 63.

The termination process will be described below with reference to FIGS. 5 and 6. FIG. 5 shows a block diagram of an apparatus that performs termination processing. When the photosensitive material 15 is cut by the cutter 17, the counter 65 is reset to the initial state. The counter 65 is supplied with the pulse signal of the pulse generator 41 that drives and controls the pair of transport rollers 39.
5 counts pulses. Thereby, the pull-out length L pulled out from the cutter 63 is measured. The count value of the counter 65 is supplied to the comparator 67. When the photosensitive material 15 is pulled out for a required length and the sensor 63 detects the identification mark 61a, the comparator 67 causes the pull-out length L, the predetermined length ML, and a standard length SL that is preset such as so-called A4 size paper. To compare. The relationship between the standard length SL and the predetermined length ML is predetermined length ML ≦ standard length SL.

The control unit 69, which is composed of a CPU (central processing unit) and the like, controls the pulse generator 41 and the cutter 17 based on the comparison result of the comparator 67. Further description will be made with reference to FIG. FIG. 6 shows a flow chart of termination processing. When the sensor 63 detects the identification mark 61a and starts the terminating process (S11), first, the extraction length L and the standard length SL are compared (S12).

When it is determined that the pull-out length L is shorter than the standard length SL, the pulse generator 41 is controlled to drive the conveying roller pair 39, and the identification mark 61a shows the cutter 17.
Is conveyed to the position (S14). Transport distance is sensor 6
The distance from 3 to the cutter 17, that is, the retreat distance BL. When the drawing length L is equal to the standard length SL, that is, when it is determined that the predetermined length ML ≦ the standard length SL = the drawing length L, the photosensitive material 15 is cut at that time (S).
13). The cut photosensitive material 15 has a length equal to or longer than the predetermined length ML and a length equal to the standard length SL, and thus can be used for desired image formation. Then, the identification mark 61a is conveyed to the position of the cutter 17 (S14).

When the identification mark 61a is conveyed to the position of the cutter 17, the pull-out length L is compared with the predetermined length ML (S15). When it is determined that the drawing length L is less than the predetermined length ML, that is, the drawing length L <the predetermined length ML ≦ the standard length SL, the conveyance roller pair 39 is driven and the identification mark 61b is conveyed to the position of the cutter 17. (S1
6). The transport distance is the distance from the sensor 63 to the leading end of the identification mark 61b in the drawing direction, that is, the predetermined length ML.

The conveyed photosensitive material 15 is identified by the identification mark 6
It is cut at approximately the center of 1b (S18). An identification mark piece 62 as shown in FIG. 4C is formed on the cut photosensitive material 15. Drawout length L is a predetermined length ML or more,
That is, when it is determined that the predetermined length ML ≦ drawing length L <standard length SL, the photosensitive material 15 has the identification mark 61a.
Is cut at approximately the center (S17). The cut photosensitive material 15 has an identification mark piece 6 as shown in FIG.
2 is formed.

Through the above processing, the photosensitive material 15 is cut at either one of the identification marks 61a and 61b, and then discharged and displayed that the material is out (S).
19). As for the display method, in addition to the case of generating characters and the like for visual recognition, for example, a warning sound is generated and recognized visually. After performing the above processing, the termination processing is ended (S20).

Although the terminating process of the photosensitive material 15 contained in the photosensitive material magazine 13 has been described above, the terminating process of the receiving material 27 contained in the receiving material magazine 25 is also performed by the same operation. It As described above, the identification mark 61a is detected when the recording material pulled out from the magazine reaches near the end. Identification mark 6
When 1a is detected, the image forming apparatus performs termination processing. The termination process is set on the basis of the pull-out length L from the cutter when the identification mark 61a is detected. An identification mark piece 62 is always formed on the recording material that has been terminated. Therefore, the operator can recognize that the material is out of the display, and also can visually recognize the identification mark piece 62 of the recording material to recognize that the material is out of material.

By the way, when an image is formed using a recording material having a small remaining amount after the above-mentioned termination processing is performed, a jam may occur especially around the cutter. When this type of jam occurs, it becomes difficult to remove the recording material and remove the jam. For the jam, for example, when the power is turned off after the termination process is performed and the power is turned on without replacing the magazine, or when the operator replaces the magazine, a magazine with a small remaining amount is accidentally loaded. It happens when. Therefore, the end of the recording material is detected in order to deal with the above situation.

The end detection process of the recording material conveyance process will be described below with reference to FIGS. 7 to 9. FIG. 7 shows a block diagram of an apparatus for performing the end detection processing. The magazine loading detector 71 detects whether or not a magazine is loaded in the image forming apparatus, and outputs the detection result to the controller 77. The sensor 73 is arranged between the conveying roller pair 39 for drawing out the recording material and the cutter, detects the presence or absence of the recording material, and outputs the detection result to the control unit 77. The door state detection unit 75 detects the opening / closing operation state of the door related to magazine exchange and outputs the detection result to the control unit 77.

The control unit 77 is composed of a CPU or the like, and controls the pulse generator 41 and the display unit 79 based on each input.
The pulse generator 41 generates a pulse signal based on the detection results of the magazine loading detection unit 71 and the door state detection unit 75, which drives the conveying roller pair 39 to pull out the recording material from the magazine. The display unit 79 displays the operating state of the image forming apparatus based on the detection result of the sensor 73.

Further description will be made with reference to FIG. FIG. 8 shows a flow chart of the end detection process when the power of the apparatus is turned on. When the image forming apparatus is powered on (S21), it is determined whether or not a magazine is loaded (S22). When it is determined that the magazine is not loaded, the fact is displayed and the loading of the magazine is instructed (S23). When it is determined that the magazine is loaded, the pulse generator 41 is controlled to generate a pulse signal, and the conveying roller pair 39 is driven so that the recording material is pulled out to the detection position of the sensor 73 (S24). . After that, the presence or absence of the recording material is determined by the sensor 73 (S25).

If it is determined that the recording material is present, normal image formation is possible, and that fact is displayed (S22). The case where the recording material is present is the case where the recording material is detected at the detection position of the sensor 73 by driving the conveying roller pair 39. When it is determined that there is no recording material, image formation is impossible due to occurrence of a jam or reaching the end of the recording material, so that is displayed (S27). When there is no recording material, it means that the recording material is not conveyed to the detection position of the sensor 73 (the occurrence of a jam) even though the conveyance roller pair 39 is driven, or the identification mark piece 62 is conveyed to the detection position. This is the case when the sensor faces the hole (reaching the end of the recording material).

Further description will be made with reference to FIG. FIG. 9 shows a flow chart of the end detection processing when the opening / closing operation of the door for magazine exchange is performed. When the door is opened / closed and the processing is started (S31), it is determined whether or not the door is opened (S32). When it is determined that the door is open, it is further determined whether the magazine has been replaced (S33). When it is determined that the magazine has been replaced, the pulse generator 41 is controlled to generate a pulse signal, and the conveying roller pair 39 is driven so that the recording material is pulled out to the detection position of the sensor 73 (S34).
After that, the presence or absence of the recording material is determined by the sensor 73 (S35).

On the other hand, when it is determined that the door has not been opened and when the magazine has not been replaced,
The presence or absence of the recording material is determined by the sensor 73 (S35). When it is determined that the recording material is present, normal image formation is possible, so that is displayed (S22), and when it is determined that the recording material is absent, a jam or a recording material is generated. Since it is impossible to form an image when the end of is reached, a message to that effect is displayed (S2
7).

By performing the above-mentioned end detection processing, it is possible to prevent the occurrence of a jam that occurs when an image is formed by loading a magazine in which the remaining amount of recording material is small. Another embodiment of the end detection processing will be described below with reference to FIGS. 7 to 9
The same parts as those of the blocks and processes shown in FIG.

In the end detection process described with reference to FIGS. 7 to 9, the presence of the recording material is detected by the sensor 73 to detect the occurrence of a jam and the arrival of the recording material at the end. Therefore, the occurrence of jam and the arrival of the end of the recording material cannot be detected separately. Therefore, the sensor 73a
Is used to detect the occurrence of a jam, and the sensor 73b is used to detect the arrival of the end of the recording material.

FIG. 10 shows a block diagram of an apparatus for performing the end detection processing. As shown in the figure, a magazine loading detector 71 for detecting the loading state of the magazine, a sensor 73a for detecting the occurrence of a jam, a sensor 73b for detecting the arrival of the end of the recording material, and a door for detecting the open / closed state of the door. Each detection signal detected by the state detection unit 75 is output to the control unit 77, and the control unit 77 controls the pulse generator 41 and the display unit 79 based on each detection signal.

The sensors 73a and 73b are arranged between the conveying roller pair 39 and the cutter for drawing out the recording material, and the sensor 73a is arranged at substantially the same position as the sensor 73b or upstream in the drawing direction. That is, the transport roller pair 39
With respect to the recording material pulled out by the sensor 73a, the sensor 73a first detects the occurrence of a jam, and then the sensor 73b detects the end of the recording material.

Further description will be made with reference to FIG. Figure 11
Shows a flow chart of the processing of the end detection processing when the power is turned on. When the image forming apparatus is powered on (S21), it is determined whether or not a magazine is loaded (S22). When it is determined that the magazine is not loaded, the fact is displayed and the magazine loading is instructed (S23).

When it is determined that the magazine is loaded, the pulse generator 41 is controlled to generate a pulse signal, and the conveying roller pair 39 is driven so that the recording material is pulled out to the detection position of the sensor 73a. (S40). After that, the presence or absence of the recording material is determined by the sensor 73a (S41). Here, the occurrence of a jam is detected. When it is determined that there is no recording material, it is impossible to form an image due to the occurrence of a jam, so that is displayed (S44). When there is no recording material
This is a case where the recording material is not conveyed to the detection position of the sensor 73a (the occurrence of a jam) even though 9 is driven.

When it is determined that the recording material is present, the conveying roller pair 39 is driven so that the recording material is further drawn to the detection position of the sensor 73b (S42). After that, the presence or absence of the recording material is determined by the sensor 73b (S43). Here, the arrival of the end of the recording material is detected. When it is determined that the recording material is present, normal image formation is possible, and that fact is displayed (S2).
6).

When it is determined that there is no recording material, image formation cannot be performed due to the end of the material, and this is displayed (S45). When there is no recording material,
The recording material was conveyed to the detection position of the sensor 73b by driving the conveying roller pair 39.
This is the case when the recording medium faces the hole (reaching the end of the recording material). Further description will be made with reference to FIG. FIG. 12 shows a flow chart of the process in the end detection process when the opening / closing operation of the door related to magazine exchange is performed. When the opening / closing operation of the door is performed (S31), it is determined whether or not the door is opened (S31).
32). When it is determined that the door is open, it is further determined whether the magazine has been replaced (S33).

When it is determined that the magazine has been replaced, the pulse generator 41 is controlled to generate a pulse signal, and the conveying roller pair 39 is driven so that the recording material is pulled out to the detection position of the sensor 73a (S34). ). After that, the presence or absence of the recording material is determined by the sensor 73a (S47). Jam is detected here. On the other hand, if it is determined that the door has not been opened and if the magazine has not been replaced, the presence or absence of recording material is determined by the sensor 73a (S47).

When it is judged that there is no recording material, it is impossible to form an image due to the occurrence of a jam, and this is displayed (S50). When there is no recording material,
This is a case where the recording material is not conveyed to the detection position of the sensor 73a (the occurrence of a jam) even though the conveyance roller pair 39 is driven. When it is determined that the recording material is present, the conveyance roller pair 39 is driven so that the recording material is further drawn to the detection position of the sensor 73b (S48). After that, the presence or absence of the recording material is determined by the sensor 73b (S49). Here, the end of the recording material is detected.

When it is determined that the recording material is present, normal image formation is possible, and that fact is displayed (S36). When it is determined that the recording material is absent, it is impossible to generate an image due to the arrival of the end of the recording material, and the fact is displayed (S51). When there is no recording material, the recording material is conveyed to the detection position of the sensor 73b by driving the conveying roller pair 39 but faces the hole of the identification mark piece 62 (reaching the end of the recording material).

By performing the above-described end detection processing, it is possible to prevent the occurrence of jam due to the image formation by loading the magazine in which the remaining amount of the recording material is small. Further, it is possible to detect the occurrence of jam and the detection of the end of the recording material separately. Further, the image forming apparatus provided with the conveyance processing device shown in FIG. 1 has a function of counting and displaying the number of processed images. Even if the power supply to the apparatus is cut off while the number of processed sheets is being displayed and the power supply is subsequently started by the restoration processing, the data before the restoration processing can be displayed.

That is, RAM (read / write memory) which is made nonvolatile by being backed up by a battery or the like.
And a rewritable ROM (readout memory), so that the lower digit (one's place) of the processed number data is stored in the RAM and the upper digit (ten's place) is stored in the rewritable ROM. . First, the processed number data is sequentially stored in the non-volatile RAM, and when the processed number reaches 10, it is moved to the rewritable ROM.

As the number of processed sheets, the number of rewritable ROMs stored × 10 + RAM stored sheets is calculated and displayed. Since the rewritable ROM is limited in the number of times of rewriting, it is originally unsuitable for the processing of storing the count data of the processed number. However, the above-mentioned inconvenience is circumvented by storing the data of the upper digit, which is rewritten less frequently, in the rewritable ROM.

A RAM made non-volatile by the above method
When backup is interrupted due to battery replacement or the like, the stored contents are erased. However, since only the data in the lower digit is deleted, the error is within the allowable range for practical use.

[0058]

According to the invention described above, the first and second identification marks are formed near the end of the recording material, and the pull-out length of the recording material is adjusted when the first identification mark appearing earlier is detected. It is possible to measure and always cut at any one of the identification mark positions with a transportable length or more. As a result, it is possible to prevent erroneous loading of the magazine caused by the inability to identify the identification mark.

Further, even when a magazine containing a recording material with a small remaining amount is loaded, a detection means for detecting the identification mark piece formed by the termination processing or the leading edge of the recording material is provided at the same time as the power supply to the apparatus. It is possible to let the operator recognize the jam, and it is possible to avoid the jam caused by loading the magazine. Further, since the operator can recognize the identification mark piece and the leading edge of the recording material by detecting them by different detecting means, it is possible to identify a magazine which does not reach the end of the material but cannot be used for normal image formation. can do.

Furthermore, even when the power source of the image forming apparatus is turned off, the pull-out length of the recording material pulled out from the predetermined position is stored and retained. Therefore, when the recording material is pulled out from the predetermined position when the power supply is started after that, it is always cut to have a length equal to or longer than the transportable length in consideration of the pull-out length. Can be avoided.

Due to these effects, it is possible to avoid a transport failure due to a jam or the like.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an apparatus that controls a return process of a recording material transport process.

FIG. 3 is a flow chart showing a flow of return processing.

FIG. 4 is a schematic diagram showing a state near a terminal end of a recording material and a cutting position.

FIG. 5 is a block diagram showing an apparatus for performing a termination process in the recording material conveyance process.

FIG. 6 is a flowchart showing the flow of termination processing.

FIG. 7 is a block diagram showing an apparatus for performing an end detection process in the recording material transport process.

FIG. 8 is a flow chart showing a flow of processing when the power of the apparatus is turned on in the end detection processing.

FIG. 9 is a flow chart showing a flow of processing when an opening / closing operation of a door relating to magazine loading is performed in the end detection processing.

FIG. 10 is a block diagram showing another embodiment of an apparatus for performing end detection processing.

11 is a flowchart showing a flow of processing when the power of the apparatus is turned on in the end detection processing shown in FIG.

12 is a flow chart showing a flow of processing in the end detection processing shown in FIG. 10 when an opening / closing operation of a door related to magazine loading is performed.

[Explanation of symbols]

 13 Sensitive Material Magazine 15 Photosensitive Material 17, 29 Cutter 25 Receiving Material Magazine 27 Receiving Material 39 Conveying Roller Pair 41 Pulse Generator 43, 65 Counter 45 Nonvolatile Memory 47 Code Judge 49, 67 Comparator 51, 69, 77 Control Part 61a, b Identification mark 62 Identification mark pieces 63, 73, 73a, b Sensor 71 Magazine loading detection unit 75 Door state detection unit 79 Display unit

Claims (4)

[Claims] 1. A recording material in which visible first and second identification marks are formed in the vicinity of a terminal end along a drawing direction at least at a transportable length and wound in a roll shape, and the recording material. A pulling-out means for pulling out the identification mark, an identification mark detecting means for detecting the identification mark, a cutting means arranged downstream of the identification mark detecting means for cutting the recording material, and a cutting-out length of the recording material. Measuring means based on the means, a transportable length, a comparing means for respectively comparing the standard length having at least the transportable length, and the pullout length, and outputs of the identification mark detecting means and the comparing means. A first control means for driving and controlling the drawing means and the cutting means, respectively, based on the above, and when the first identification mark is detected by the identification mark detecting means, the pulling means is provided. When the length is less than the standard length, the first control means drives the pull-out means to pull out the first identification mark to the position of the cutting means, and at that time, the pull-out length is the transportable length. In the above case, the first control means drives the cutting means to cut the recording material at the position of the first identification mark, and when the pull-out length is less than the transportable length, the first control means The first control means drives the drawing means to pull out the second identification mark to the position of the cutting means and drive the cutting means to cut the recording material at the position of the second identification mark. A recording material conveyance processing device characterized by the above. 2. A visible first and second identification mark is formed in the vicinity of the terminal end along a pulling direction at a first predetermined length having at least a transportable length, and is wound in a roll shape. A recording material; a pulling-out means for pulling out the recording material; a magazine loading detecting means for detecting a loading state of a magazine which contains the recording material and is detachably mountable in the image forming apparatus; The magazine replacement detecting means for detecting and the downstream of the drawing means in the drawing direction and a position corresponding to the first and second identification marks are arranged, and the presence or absence of the recording material is discriminated to determine the leading end of the recording material or the first recording material. Based on the detection results of the recording material detection means for detecting the first and second identification marks, the magazine loading detection means, the magazine replacement detection means, and the recording material detection means. A second control unit for driving and controlling the recording / drawing unit, and when the loading of the magazine is detected by the magazine loading detection unit when the power of the image forming apparatus is turned on, or the magazine replacement detection unit is used. When the replacement of the recording material is detected, the second control means drives the drawing means so as to draw the recording material to the detection position of the recording material detecting means, and when it is determined that the recording material is absent, A recording material conveying / processing apparatus characterized in that the occurrence of a jam or the arrival of the end of the recording material is recognized. 3. A visible first and second identification mark is formed in the vicinity of the terminal end along a drawing direction at a first predetermined length having at least a transportable length, and is wound in a roll shape. A recording material; a pulling-out means for pulling out the recording material; a magazine loading detecting means for detecting a loading state of a magazine which contains the recording material and is detachably mountable in the image forming apparatus; A magazine exchange detecting unit for detecting, and a first unit arranged downstream of the drawing unit in the drawing direction, for detecting the leading edge of the recording material by determining the presence or absence of the recording material.
Recording material detection means, and is arranged at a position corresponding to the first and second identification marks downstream of the first recording material detection means in the drawing direction.
Second recording material detecting means for determining the presence or absence of the recording material to detect the first and second identification marks, the magazine loading detecting means, the magazine replacement detecting means, and the first and second Recording material detection means and third control means for driving and controlling the drawing means based on the respective detection results, and when the power supply of the image forming apparatus is turned on, the magazine loading detection means detects loading of the magazine. When the magazine replacement detection unit detects that the magazine has been replaced, the third control unit pulls out the recording material to the detection position of the first recording material detection unit. When the first recording material detecting means determines that the recording material is present, the recording material is further detected by the second recording material detecting means. When the second recording material detecting means determines that the recording material is absent, or when the first recording material detecting means determines that the recording material is absent, the extracting means is driven so that the recording material is pulled out to the set position. In this case, the recording material conveying and processing device is characterized in that each of the recording material conveyance means recognizes the end of the recording material or the occurrence of a jam. 4. A drawing-out means for drawing out the recording material wound in a roll and accommodated therein, a cutting means for cutting the drawn-out recording material, and a cutting-out means for drawing out the drawn-out length of the recording material. And a storage unit that stores and holds the measurement result of the measurement unit even when the power supply to the image forming apparatus is cut off, and a comparison unit that compares the pull-out length with at least the transportable length. And a control unit that controls the drawing unit and the cutting unit based on the comparison result of the comparison unit, and at the time of re-power supply after the power supply to the image forming apparatus is cut off, the recording material is When the pull-out length is equal to or longer than the transportable length while being pulled out from the cutting means, the control means drives the cutting means to cut the recording material, and the pull-out length is When the length is less than the transportable length, the pulling-out means is driven to pull out the recording material until the pull-out length becomes at least the transportable length, the cutting means is driven to cut the recording material, and the cut recording material is cut. A recording material conveying / processing apparatus characterized in that the recording material can be discharged.