JP3347923B2 - Copier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine capable of copying a large-sized document.

[0002]

2. Description of the Related Art Conventionally, a document is optically scanned, an electrostatic latent image corresponding to the document is formed on a photosensitive member based on the scanning, and the electrostatic latent image is developed into a toner image. Copiers that transfer a toner image to a copy sheet are widely used. As such a copying machine, there is provided a copying machine capable of copying a large-sized document such as Japanese Industrial Standards A row 0 (hereinafter referred to as "A0 version").

A copying machine capable of copying a large-sized document is usually provided with a reading mechanism capable of reading a large-sized document and a transport mechanism for transporting a large-sized copy sheet corresponding to the document. I have. As the copy sheet, a belt-shaped roll sheet wound around a roll body is usually used. Specifically, the roll sheet is pulled out from the roll body, is conveyed in a predetermined conveyance direction along the conveyance path, and the toner image is transferred to the roll sheet being conveyed. Then, the roll sheet is cut by the cutter mechanism at a predetermined timing, and the cut roll sheet is discharged. As described above, the reason why the roll sheet is cut into a copy sheet is that the cut A0
This is because a large-sized cut sheet such as a plate is inconvenient to handle and requires a large accommodation space.

[0004] By the way, for example, when a power failure occurs,
Naturally, the copier is turned off. When the power is turned off, the operation of the copying machine is forcibly stopped. The power supply of the copying machine is also turned off when an abnormal usage is performed, for example, when the user accidentally opens the front cover or the like. If the power of the copying machine is turned off and the operation of the copying machine is forcibly stopped while the roll sheet is being conveyed, that is, during the copying operation, the roll sheet remains on the conveyance path. Therefore, in order to return the power to a state where the copying operation can be restarted, it is necessary to remove the roll sheet from the transport path. On the other hand, if the power of the copying machine is turned off during the copying operation,
An abnormality occurrence code such as "J-6" is displayed on the display unit.
This prompts the user to remove the roll sheet from the transport path.

In the above-described case, when removing a roll sheet from the transport path, the burden on the user for removing the sheet greatly differs depending on whether the roll sheet is cut or after the cut. That is, if the power of the copying machine is turned off before the roll sheet is cut, the roll sheet remaining on the transport path remains connected to the roll body. Therefore, the operation of removing the long roll sheet is extremely complicated and requires a great deal of labor. On the other hand, if the power of the copier is turned off after the roll sheet is cut, the roll sheet is relatively separated from the roll body, so that the work of removing the roll sheet is relatively simple.

Therefore, conventionally, when the power of the copying machine is turned off before the roll sheet is cut, the roll sheet is cut off according to the user's intention and then the sheet is removed. The cutting of the roll sheet can be performed, for example, by attaching a handle to the cutter mechanism and manually cutting the roll sheet, or by operating a tip cut key for operating when the cutter mechanism is manually operated.

[0007]

However, in the above copying machine, whether or not the power of the copying machine is turned off before the roll sheet is cut off is determined by the user opening the front cover or the like of the copying machine. It can only be determined by checking the condition of the seat. This is because the above-mentioned copying machine merely displays an abnormality occurrence code such as "J-6" after the power is restored. Therefore, the user has to take extra time when removing the roll sheet. Therefore, there is a problem that the service for the user is lacking.

Accordingly, an object of the present invention is to solve the above-mentioned technical problem, and when the power is turned off after the power is turned off during the execution of the copying operation, the roll sheet during the execution of the copying operation before the power is turned off is turned off. The object of the present invention is to provide a copying machine capable of notifying a user whether or not the disconnection has been performed.

[0009]

According to a first aspect of the present invention, in a copying machine according to the first aspect of the present invention, a roll sheet is pulled out of a roll body and a predetermined conveyance is performed along a conveyance path in a state where a power supply is turned on. The rolled sheet is transported in the direction, the original image formed by the electrophotographic method is transferred to the rolled sheet being transported, and the rolled sheet being transported is cut by cutting means at a predetermined timing. And a return determining means for determining whether or not the power is turned on after the power is turned off during the execution of the copying operation, and When the determining means determines that the power has been restored, it is determined whether or not the cutting of the roll sheet by the cutting means has been performed during the copying operation before the power was turned off. A cutting determination means for, characterized in that it comprises a notifying means for notifying the determination result in the cutting discriminating means.

According to this configuration, when the power is turned off after the power is turned off during the execution of the copying operation and the roll sheet is not cut off during the execution of the copying operation before the power is turned off. Will be notified to that effect,
It is not necessary for the user to check whether or not the roll sheet has been cut. Further, the copying machine according to claim 2 is the copying machine according to claim 1, wherein the disconnection determining means disconnects the roll sheet when the return determining means determines that the power has been restored. First determining means for determining whether or not the roll sheet is present at a position near the downstream side in the transport direction of the means; and in the first determining means, the roll sheet is located at a position near the downstream side in the transport direction of the cutting means. When it is determined that the roll sheet is present, conveyance control means for conveying the roll sheet by a predetermined length in the conveyance direction along the conveyance path, and after the roll sheet is conveyed by the predetermined length by the conveyance control means, A second step of determining whether or not the sheet exists at a position near the downstream side of the cutting unit in the conveying direction;
The second determining means determines that the roll sheet is present at a position near the downstream of the cutting means in the transport direction after the roll sheet has been transported by a predetermined length. Further, it is characterized in that it is determined that the cutting of the roll sheet by the cutting means has not been executed during the execution of the copying operation before the power is turned off.

In this configuration, after the power is restored, if the roll sheet is present at a position near the downstream side in the transport direction of the cutting means, the roll sheet is transported by a predetermined length, and the roll sheet is still at the predetermined position. If you have
It is determined that the cutting of the roll sheet has not been executed. That is, if the roll sheet is cut, the roll sheet cannot be stopped at the above-mentioned position after the roll sheet existing at the position near the cutting means is transported for a predetermined length. Therefore, according to this configuration, it can be reliably determined whether or not the cutting of the roll sheet has been executed.

According to a third aspect of the present invention, there is provided the copying machine according to the first aspect, wherein the disconnection determining means determines that the power has been restored by the return determining means. Includes a preparation state determining means for determining whether or not the cutting means is in a cutting preparation state. When the preparation state determination means determines that the cutting means is in the cutting preparation state, it executes a copying operation before the power is turned off. It is characterized in that it is determined that the cutting of the roll sheet by the cutting means in the inside has not been executed.

In this configuration, if the cutting means is in the cutting preparation state after the power is restored, it is determined that the roll sheet has not been cut. That is, in the cutting preparation state, it can be naturally determined that the cutting has not been executed. Therefore, according to this configuration, it can be reliably determined whether or not the cutting of the roll sheet has been executed.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional view schematically showing the internal configuration of a copying machine according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an external configuration of the copying machine. FIG. 3 is a perspective view showing the appearance of the copying machine during copying. This copying machine is capable of copying a large size original such as an A0 plate. In this copying machine, while the original is being conveyed, the surface of the original is illuminated and scanned by an optical system fixedly arranged, and an image is formed based on the illuminated scanning.

In FIG. 1, at the bottom of the copying machine main body 1,
Caster wheels 2 are mounted. Thus, the copying machine main body 1 is movable. 2 or 3, a power switch PSW for turning on the power is provided, for example, on the left side surface of the copying machine main body 1. In FIGS. 1 to 3, an original conveying section 10 is provided at an upper portion of the copying machine main body 1. Document feeder 10
Is for transporting the document 9 along a document transport path 41 formed on the upper surface of the copying machine body 1. An outlet 54 is opened in the front surface 1a of the copying machine body 1. The discharge port 54 is for discharging the sheet on which the toner image has been transferred. The sheet discharged from the discharge port 54 falls with its leading end downward while being guided by the guide member 91 shown in FIG. The dropped sheets are sequentially accommodated in the pockets 92 through the introduction openings 93. Pocket 92
Is formed by a front cover 5 along the front surface 1a of the copying machine body 1. An operation unit 100 is provided at an end of the upper surface of the copying machine main body 1. In the operation unit 100, switches, keys, and the like for performing various settings related to copying are arranged. Details will be described later.

In FIG. 1, a portion below the central portion in the height direction inside the copying machine main body 1 is provided with a sheet storage case B.
1, B2, and B3 (hereinafter collectively referred to as "sheet storage case B") are sequentially arranged. The sheet storage cases B1, B2, B3 are for storing the roll sheet bodies 4A, 4B, 4C around which the roll sheet 4 is wound. Examples of the type of the roll sheet 4 include plain paper, film, and tracing paper. The sheet accommodating case B1, B2, B3, roller RL _1, RL _2, RL ₃ rewind also serves as a roll axis is provided, respectively. Roll sheet body 4A-4C
Means that the roll sheet 4 has the rewind rollers RL _{1 to} RL ₃
, Respectively.

The sheet storage case B is arranged in the copying machine main body 1 so as to be able to be pulled out. Seat storage case B1, B
2 and B3 have levers L1 and
L2 and L3 are provided, respectively. The front surface 1a of the copying machine main body 1 can be opened and closed in the left-right direction in the figure. In this connection, the copying machine body 1 is provided with a safety switch SSW. The safety switch SSW detects opening and closing of the front surface 1a. Specifically, the safety switch SSW is turned on when the front surface 1a is open, and turned off when the front surface 1a is closed.

A bypass transport path D4 is provided at the center of the copying machine body 1. Bypass transport path D
Reference numeral 4 is for supplying the cut sheet 4D introduced to the manual paper feed unit 30 provided on the front surface 1a of the copying machine body 1 to the copying machine body 1. As the cut sheet 4D, for example, A0 to A4 plates can be exemplified. From the upper roll sheet body 4A, the roll sheet 4 is transported by the rewind roller RL ₁ , the feed roller FL ₁ , the first leading edge detection switch RLDSW ₁ for detecting the leading edge of the transported roll sheet 4, Roller HL, cutter mechanism 80, registration switch RSW, registration roller LL,
And the photosensitive drum 2 via the transport roller 33 sequentially.
The sheet is conveyed in the conveyance direction K along the first conveyance path D1 reaching 0.

The first leading end detection switch RSDSW
Reference numeral ₁ indicates that if the roll sheet 4 exists, it is turned on, and if not, it is turned off. In addition, the second
The same applies to the third tip detection switch. Further, the resist switch RSW is turned on when the roll sheet 4 exists, and turned off when the roll sheet 4 does not exist.

From the middle roll sheet body 4B,
Sheet 4 is a rewind roller RL _Two, Paper feed roller FL
_TwoFor detecting the leading edge of the conveyed roll sheet 4
Second tip detection switch RLDSW_Two, Transport roller H
L, cutter mechanism 80, resist switch RSW, resist
Through the roller LL and the transport roller 33 sequentially.
Transport along the second transport path D2 leading to the photosensitive drum 20
It is transported in the transport direction K. The route after the transport roller HL is
It is common to the first transport path D1.

From the lower roll sheet body 4C,
Sheet 4 is a rewind roller RL _Three, Paper feed roller FL
_ThreeFor detecting the leading edge of the conveyed roll sheet 4
Third tip detection switch RLDSW_Three, Transport roller H
L, cutter mechanism 80, resist switch RSW, resist
Through the roller LL and the transport roller 33 sequentially.
Transport along the third transport path D3 leading to the photosensitive drum 20
It is transported in the transport direction K. The route after the transport roller HL is
It is common to the first transport path D1.

In the following, the transport routes D1, D2, D
3 is referred to as “transport path D”. The rewind rollers RL ₁ , RL ₂ , and RL ₃ are collectively referred to as “rewind rollers RL”. Further, the paper feed rollers FL ₁ , FL ₂ , and FL ₃ are collectively referred to as “paper feed rollers FL”. Furthermore, the first leading edge detection switch RLDSW ₁ and the second leading edge detection switch RLDS
W ₂ and the third tip detection switch RLDSW ₃ are collectively referred to as “tip detection switch RLDSW”.

The bypass conveyance path D4 is provided with a fourth end detection switch 75 for detecting the front end of the cut sheet 4D to be conveyed, and the cut sheet 4D is loosened by sliding a sliding contact plate (not shown). Yes) separation roller 3
2. Fifth detecting end of cut sheet 4D being conveyed
This is a path for guiding the cut sheet 4D introduced from the manual paper feed unit 30 to the photosensitive drum 20 via the leading edge detection switch 76, the transport roller 39, and the transport roller 33 in this order. The route after the transport roller 33 in the bypass transport route D4 is common to the first transport route D1.

The cutter mechanism 80 is provided in the casing 80A for cutting the roll sheet 4 between a long fixed blade 81 extending in a direction perpendicular to the transport direction K of the roll sheet 4 and the fixed blade 81. And the rotary blade 82.
In the cutter mechanism 80, when the rotary blade 82 is driven, the roll sheet 4 is cut by the interaction between the rotary blade 82 and the fixed blade 81. The driving of the rotary blade 82 is executed by a cutter motor described later via a cutter clutch.

The document conveying section 10 sets the conveying direction to the forward direction R1.
And the reverse direction R2 for transporting the original 9. The image forming operation is performed when a document is transported in the forward direction R1. When a plurality of copies are made from the same original, the original transport unit 10 sets the transport direction to the forward direction R.
The document 9 is conveyed alternately in the direction of 1 and the reverse direction R2. Further, on the upper surface of the copying machine main body 1, the above-described document conveying portion 41 is formed at a position upstream of the document conveying portion 10 in the forward direction R <b> 1 to a position protruding from the upper surface of the copying machine main body 1.

The document transport section 10 includes a first document edge detection switch OLDSW, a first transport roller 12, a second document edge detection switch OTDSW,
The second transport roller 14 and the third transport roller 15 are sequentially arranged. The first transport roller 12 guides the set document to the transparent plate 13 in the document transport unit 10. The first transport roller 12 switches the first document end detection switch OLDSW from OFF to ON and causes the leading end of the document 9 (the downstream end in the forward direction R1).
Is started in response to the detection of. The second transport roller 14 is for bringing the original 9 into close contact with the transparent plate 13 for slit exposure, and is provided at a position facing the transparent plate 13. Third transport roller 15
Is for discharging the original 9 after exposure.

Also, a second document end detection switch OTDS
W is switched from off to on when the original 9 is conveyed in the forward direction R1, so that the original 9
Detect the tip of Second document end detection switch OTDS
In response to W being turned on, the conveyance of the roll sheet 4 is started. As a result, the conveyance of the document 9 and the conveyance of the roll sheet 4 are synchronized.

Also, a first document end detection switch OLDS
W is switched from on to off when the original 9 is conveyed in the forward direction R1, and thereby the original 9 in the forward direction R1 is switched.
Detect the rear end of At a predetermined timing after a lapse of a predetermined time from the timing of this detection, the cutter mechanism 80 is driven, and the roll sheet 4 is cut. In the present embodiment, the length of the feed path of the roll sheet 4 from the cutter mechanism 80 to the transfer position 20b of the transfer corona discharger 24 is determined by the length of the document feed from the first document end detection switch OLDSW to the document exposure position 44. The length is set to be longer than the length of the paper path by the length from the exposure position 20a of the photosensitive drum 20 to the transfer position 20b. Thus, an image corresponding to the rear end of the document 9 can be formed on the rear end of the roll sheet 4 obtained by cutting at the above timing.

Further, a second document end detection switch OTDS
W is switched from on to off when the original 9 is conveyed in the reverse direction R2, and thereby the original 9 in the reverse direction R2 is changed.
Detects the trailing end. This second document end detection switch OT
When the DSW is turned off, the transport rollers 12, 1
Drives 4 and 15 are stopped. At this time, the leading end of the document 9 is held between the transport rollers 12, and is ready for the next copying operation.

Reference numeral 8 denotes a reversing member for reversing the direction of the original so as to prevent the original 9 from dropping behind the copying machine body 1. The original 9 in relation to the transparent plate 13
A light source 17 for illuminating the original surface is fixedly arranged. The light from the light source 17 is applied to the surface of the document via the transparent plate 13. Then, the reflected light from the surface of the document 9 is guided by the selfoc lens 18 to the surface of the photosensitive drum 20 provided substantially at the center of the copying machine main body 1. The surface of the photosensitive drum 20 before being exposed to the light from the selfoc lens 18 is uniformly charged by the charging corona discharger 21. Therefore, an electrostatic latent image corresponding to the original image is formed on the surface of the photosensitive drum 20 after the exposure. This electrostatic latent image is visualized into a toner image by the developing device 22. This toner image is guided to the vicinity of the transfer corona discharger 24 by rotating the photosensitive drum 20 in the direction of the arrow 23.

On the other hand, the roll sheet 4 guided to the photosensitive drum 20 from each of the paper feeding paths D1, D2 or D3 is further guided to a corona discharger 24 for transfer, and the corona discharge of the discharger 24 for transfer is performed. Thereby, the toner image on the surface of the photosensitive drum 20 is transferred to the roll sheet 4. The roll sheet 4 onto which the toner image has been transferred is peeled off from the surface of the photoconductor drum 20 by corona discharge in the peeling corona discharger 25, and further guided to the fixing device 35 through the transport path 34.

The transport path 34 includes a transport switch PC
SW is provided. The transport switch PCSW turns on when the roll sheet 4 exists in the transport path 34 and turns off when the roll sheet 4 does not exist. In the fixing device 35, the toner is fixed on the surface of the roll sheet 4 by heating and pressing the roll sheet 4 between the heat roller 37 and the pressure roller 38. The roll sheet 4 on which the toner has been fixed is discharged from the discharge roller EL to the outside of the copying machine main body 1 through a discharge pulse switch FPS and a discharge switch ESW, which will be described later. To be housed. On the other hand, the toner remaining on the surface of the photosensitive drum 20 after the transfer of the toner image is removed by the cleaning device 26, and the preparation for forming the next electrostatic latent image is made. Bypass feed path D
Similarly, the toner image is transferred and fixed to the cut sheet 4 </ b> D guided to the photoconductor drum 20 from the photosensitive drum 20, and is discharged to the pocket 92.

A guide auxiliary plate 94 is arranged above the guide member 91. This guide auxiliary plate 94
Is a stay 9 attached to the front surface 1a of the copying machine body 1.
The guide member 91 is rotatably supported by the guide member 5 and guides the roll sheet 4 hanging down in front of the guide member 91 and discharged to the pocket 92 together with the guide member 91 (in FIG. ) And the storage position held by the stay 95 (shown by a solid line in FIG. 1).
And can be displaced.

In this copying machine, the photosensitive drum 2
0, a main motor MM for driving the developing device 22 and the corona discharger 24 for transfer, and a feed motor PF for driving a roller group for feeding the sheets 4 and 4D.
M, a fixing motor FM for driving the heat roller 37 and the pressure roller 38 of the fixing device 35, and a document transport motor OM for driving the document transport unit 10 are provided.

FIG. 4 is a plan view showing the operation unit 100. The operation unit 100 includes a display unit 100a. The display unit 100a includes a liquid crystal display element (LC
D), which is composed of a plasma display element and the like, for displaying various messages necessary for copying, codes and the like when an abnormality occurs. Operation unit 1
00a is also provided with a tip cut key 100b. The leading edge cut key 100b is a key that is operated when the cutting mechanism 80 is manually operated when the leading edge of the roll sheet 4 is straightened.

FIG. 5 is a block diagram showing an electric configuration of a control circuit in the copying machine, in particular, a control circuit related to the conveyance of the roll sheet 4. The control circuit includes a microcomputer 200 as a control center. The microcomputer 200 has a CP
U, a RAM, and a ROM, and executes various processes such as a display process after power return, which will be described later, according to a control program stored in the ROM.

Signals are input to the microcomputer 200 from various switches. More specifically, the safety switch SSW, the registration switch RSW, the transport switch P
CSW, discharge switch ESW, tip detection switch RLD
SW and a signal from a cutter home position switch CHPSW for determining whether or not the rotary blade 82 is at the home position are input.

On the other hand, in the microcomputer 200,
Various paper feed mechanisms are controlled based on input signals from the switches. Specifically, in the microcomputer 200, the on / off of the paper feed motor PFM, the on / off of the paper feed clutch FCL for controlling the driving force to be applied to the paper feed roller FL, and the application to the rewind roller RL. Rewind clutch R for controlling the power to be driven
ON / OFF of WCL is controlled.

In the microcomputer 200,
On / off of the roll transport clutch RPCCL for controlling the driving force to be applied to the transport roller HL, on / off of the registration clutch RCL for controlling the driving force to be applied to the registration roller LL, and to the discharge roller EL. On / off of the discharge clutch ECL for controlling the driving force to be applied is controlled.

Further, in the microcomputer 200, the ON / OFF of the fixing motor FM, the ON / OFF of the heat clutch 37 a for controlling the driving force to be applied to the heat roller 37, and the driving force to be applied to the pressure roller 38 ON / OFF of the pressure clutch 38a for controlling the pressure is controlled. Furthermore, in the microcomputer 200, the on / off of the cutter motor KM and the rotation of the rotary blade 82
The on / off of the cutter clutch KCL for controlling the driving force to be given to the cutter is controlled.

The microcomputer 200 includes:
Setting signals are input from various keys and the like arranged on the operation unit 100 including the tip cut key 100b. In the microcomputer 200, based on the input of the setting signal from each of the keys or the input signal from each of the switches, the display unit 1 arranged on the operation unit 100 is controlled.
The display content at 00a is controlled.

Further, in the microcomputer 200, the power supply state of the power supply circuit 210 is monitored. The power supply circuit 210 is for converting the electric power supplied from the commercial power supply 211 to a desired electric power and supplying the desired electric power to each part of the copying machine. The power supply is started when the power switch PSW is turned on. FIG. 6 is a timing chart showing the operation of the copying machine after the roll sheet 4 is set and the normal copying operation. In the description of FIG. 6, FIG. 1 is also referred to.

When the front surface 1a is open to accommodate the roll sheet 4 in the sheet accommodation case B, the safety switch SSW is turned on. In this state, when the housing is completed and the front surface 1a is closed, the safety switch SSW
Is turned off (t ₁ ). When the safety switch SSW is turned off, first, a skew processing for aligning the leading ends of the roll sheets 4 is executed.

That is, in response to the safety switch SSW being turned off, the paper feed motor PFM and the paper feed clutch FCL are turned on. As a result, the paper feed roller FL is driven. Thus, the roll sheet 4 is transported along the transport path D in the transport direction K. In this state, when the leading end detection switch RLDSW is turned on (t ₂ ), after a lapse of a predetermined time, the paper feed clutch FCL is turned off,
The rewind clutch RWCL is turned on (t ₃ ). As a result, the paper feed roller FL stops and the rewind roller RL is driven. As a result, the roll sheet 4 returns along the transport path D. And the tip detection switch RL
When the DSW is turned off (t ₄ ), the rewind clutch RWCL is turned off in response to this, and the paper feed clutch F
CL is turned on. As a result, the roll sheet 4 is transported again in the transport direction K along the transport path D. The above operation is repeated three times in total.

At the end of the skew processing, the leading end detection switch R
After a predetermined time has elapsed since the LDSW was turned on (t_Five), Paper feed mode
The feeder PFM and the paper feed clutch FCL are turned off. That
After that, the tip cut key 100b is turned on by the user.
Until it is ready. In this standby state,
When the tip cut key 100b is turned on by the
(t ₆), A front end cutting process is executed. This tip cutting process
The reason is that the end of the roll sheet 4 is not necessarily
This is because they are not always cut immediately.

First, the sheet feeding motor PFM and the sheet feeding clutch FCL are turned on, and the registration clutch RC
L and the roll transport clutch RPCCL are turned on.
As a result, the paper feed roller FL, the registration roller LL, and the transport roller HL are driven. Thus, the roll sheet 4 is transported along the transport path D in the transport direction K. Then, when the roll sheet 4 reaches the registration switch RSW and the registration switch RSW is turned on (t ₇ ), after a lapse of a predetermined time (t ₈ ), the paper feed clutch FCL, the registration clutch RCL, and the roll transport clutch RPCCL are turned off. You. The reason why the paper feed clutch FCL and the like are turned off after the lapse of a predetermined time is to make the roll sheet 4 bite by the registration rollers LL.

At the same time, the cutter clutch CCL is turned on. As a result, the rotary blade 82 rotates so as to reach the home position. That is, the preparation for cutting is prepared. Then, when the rotary blade 82 reaches the home position and the cutter home position switch CHPSW is turned on (t ₉ ), the paper feed clutch FCL, the registration clutch RCL and the roll transport clutch RPCCL are turned on in response to this. As a result, the roll sheet 4 is conveyed toward the photosensitive drum 20. At the same time, the cutter clutch CCL is turned off.

Thereafter, the roll sheet 4 is moved to the discharge roller EL.
After sufficient time to reach (t_Ten)
In response, the cutter clutch CCL is turned on for a predetermined time.
Is done. Thereby, the roll sheet 4 is cut. So
As a result, the leading end of the roll sheet 4 becomes straight. That
Thereafter, the cutter clutch CCL is turned off. At the same time, feed
Clutch FCL and roll transport clutch RPCCL
Turns off and rewind clutch RWCL turns on
(T₁₁). As a result, the roll sheet 4 is transported along the transport path.
It is transported along the direction D in the direction opposite to the transport direction K. Soshi
Roll sheet 4 returns to the home position and
When the intelligent switch RLDSW is turned off (t ₁₂) ,Rewind
The clutch RWCL is turned off.

On the other hand, while the above operation is being performed, the roll sheet 4 is discharged outside the copying machine by the discharge roller EL. When the transport switch PCSW is turned off,
(t ₁₃ ), feed motor PFM and registration clutch RC
L is turned off, and the mode shifts to the copy standby mode. The pre-copy processing is achieved by the above operation.

After the end of the pre-copying process, when the original 9 is set on the original transport section 10, the transport of the original 9 is started.
When the second original end detection switch OTDSW is turned on (t ₁₄ ), the paper feed motor PFM and the paper feed clutch FC
L, the registration clutch RCL and the roll transport clutch RPCCL are turned on. As a result, the paper feed roller FL,
The registration roller LL and the transport roller HL are driven. As a result, the roll sheet 4 waiting at the home position is transported in the transport direction K along the transport path D.

When the registration switch RSW is turned on (t ₁₅ ), after a sufficient time has elapsed to cause the leading end of the roll sheet 4 to bite the registration roller LL (t ₁₆ ), the sheet feeding clutch FCL and the registration The clutch RCL and the roll transport clutch RPCCL are turned off. At the same time, the cutter clutch CCL is turned on. As a result, the rotary blade 82
Rotates. When the cutter home position switch CHPSW is turned on (t ₁₇ ), the cutter clutch CC
L is turned off. Thus, preparation for cutting is prepared.

Thereafter, the ON operation of the paper feed clutch FCL and the like is started.
(t ₁₄₎ a predetermined time required to obtain synchronization with the conveyance of the original 9 in response to the elapsed (t _18), the registration clutch RCL and roll conveyance clutch RPCCL is turned on. As a result, the roll sheet 4 is
Conveyed toward. Then, the toner image formed on the photosensitive drum 20 is transferred to the roll sheet 4.

In this state, when the first original end detecting switch OLDSW for detecting the trailing end of the original 9 is turned off (t ₁₉ ), the roll transport clutch RPCCL is turned off. After a lapse of a predetermined time (t ₂₀ ), the cutter clutch CCL is turned on. As a result, the rotary blade 82 starts rotating from the home position, and the roll sheet 4 is cut. The cut roll sheet 4 is discharged to the outside of the apparatus by the discharge roller EL as it is. Then, when the registration switch RSW is turned off (t ₂₁ ) and the transport switch PCSW is turned off (t ₂₂ ), the registration clutch RCL and the sheet feeding motor 61 are turned off.

Thus, one image transfer operation is achieved. After one image transfer operation is completed, the when ready to resume copying operation, the paper feeding motor 61 and the rewinding clutch RWCL is turned on (t _23). As a result, the roll sheet 4 conveyed to the cutter mechanism 80 is rewound. When the leading edge detection switch RLDSW is turned off (t ₂₄ ), the rewind clutch RWCL is turned off and the paper feed clutch FCL is turned on. As a result, the roll sheet 4 is transported again in the transport direction K along the transport path D. Then, after a predetermined time has elapsed leading-edge detection switch RDLSW from being turned on (t _25), the sheet feeding motor PFM and the sheet feeding clutch FCL is turned off, the standby state.

By the way, in this copier, in copying operation execution (t ₁₄ ~t ₂₂ in FIG. 6), the power supply by, for example, power failure, etc. may become off. That is, the power supply from the power supply circuit 210 to each part of the copying machine may be stopped. In such a case, the operation of the copying machine is forcibly stopped, so that the roll sheet 4 being transported remains on the transport path D. Therefore, the roll sheet 4 needs to be removed from the transport path D in order to restore the power supply to enable the copying operation. On the other hand, the user
Whether or not the roll sheet 4 remains in the transport path D cannot be determined only by looking at the appearance of the copying machine. Therefore, in the copying machine, it is preferable to give some message to the user after the power is restored.

FIG. 7 is a flow chart for explaining the display processing after the power is restored when the power is turned off after the power is turned off during the copying operation. The display processing after the power is restored is executed by the microcomputer 200. After the power is turned off, the microcomputer 20
At 0, it is determined whether the power switch PSW is turned on and the power is restored (step S1). Specifically, in the microcomputer 200, the power supply circuit 210
Is monitored, and when the power supply is started from the state where the power supply is stopped, it is determined that the power supply is restored.

If it is determined in step S1 that the power has been restored, the microcomputer 200
Then, it is determined whether or not the registration switch RSW is turned on (step S2). That is, if the registration switch RSW is turned on, when the power is turned off, it can be determined that the roll sheet 4 remains in the transport path D. As a result of the determination in step S2,
If it is determined that the registration switch RSW is not turned on, it is determined whether or not the transport switch PCSW is turned on (step S6). As a result, when it is determined that the transport switch PCSS is not turned on, it is next determined whether or not the ejection switch ESW is turned on (step S7). As a result, when it is determined that the discharge switch ESW is not turned on, it is determined that the roll sheet 4 does not remain on the transport path D, and “READY” indicating that the copying operation can be restarted is displayed on the display unit 100a. (Step S8).

On the other hand, as a result of the determination in step S6,
If it is determined that the transport switch PCSW is turned on, the roll sheet 4 is determined to remain at least in the transport path 34, indicating that the roll sheet 4 is remaining in the transport path D "J-6". Is displayed on the display unit 100a. Similarly, when it is determined that the discharge switch ESW is turned on as a result of the determination in step S7, it is determined that the roll sheet 4 remains at least at the position where the discharge switch ESW is provided. "-6" is displayed on the display unit 100a.

When it is determined in step S2 that the registration switch RSW is turned on, it can be determined that the roll sheet 4 exists at least at a position where the registration switch RSW is provided. . On the other hand, it is not possible to determine whether or not the roll sheet 4 has been cut just by turning on the registration switch RSW. This is because the power may be turned off immediately after disconnection. Therefore,
If it is determined in step S2 that the registration switch RSW is turned on, a process is performed to determine whether or not the roll sheet 4 has been cut (steps S3 to S5).

That is, when it is determined that the registration switch RSW is turned on, the microcomputer 20
A value of 0 causes the roll sheet 4 to be transported in the transport direction K by a predetermined length (step S3). Specifically, in the microcomputer 200, the sheet feeding motor PFM, the roll transport clutch RPCCL, and the registration clutch RCL
Is turned on for a predetermined time corresponding to the predetermined length. As a result, the feed roller FL, the transport roller HL, and the registration roller LL are driven for the above-described predetermined time. Thereby, the roll sheet 4 can be transported by the predetermined length in the transport direction K.

The reason that the roll sheet 4 is transported by a predetermined length is that if the roll sheet 4 is cut, the cut roll sheet 4 is gradually separated from the roll bodies 4A to 4C according to the above transport. Because it should be.
On the other hand, whether or not the connection is separated can be determined by turning on / off the registration switch RSW. Therefore, it is necessary to set the predetermined length to at least the distance from the cutting position of the cutter mechanism 80 to the registration switch RSW.

In the microcomputer 200, after the conveyance of the roll sheet 4 is completed, the registration switch R
It is determined whether or not the SW is turned on (step S
4). As a result, if the registration switch RSW is turned off, it is determined that the power has been turned off immediately after the cutting, and “J-6” indicating that the roll sheet 4 simply remains on the transport path D is displayed. It is displayed on the display unit 100a (step S9).

On the other hand, if the registration switch RSW is turned on, it is determined that the roll sheet 4 has not been cut, and "JC-6" indicating that the roll sheet 4 remains on the transport path D and has not yet been cut. Is displayed on the display unit 100a (step S5). In addition, even if the roll sheet 4 is conveyed by a predetermined length and the roll sheet 4 still remains, the roll sheet 4 may be cut by the cutter mechanism 80 as well as before the roll sheet 4 is completely cut. It is conceivable that the power was turned off while the power was on.

After turning on the power switch SW and restoring the power, the user checks the display contents of the display section 100a as described above, and performs an appropriate measure in accordance with the display contents to thereby operate the copier. It can be restored to a copyable state. For example, the display unit 1
If "READY" is displayed in 00a, there is no need to do anything. When “J-6” is displayed on the display unit 100a, the display unit 100a described below will be described.
In the case where "JC-6" is displayed on the screen, the procedure after cutting the roll sheet 4 in the procedure may be performed. Next, the processing when “JC-6” is displayed on the display unit 100a will be described.

When "JC-6" is displayed on the display section 100a, it is necessary to cut the roll sheet 4 on the transport path D first. Therefore, the user only has to operate the tip cut key 100b, for example. When the leading end cut key 100b is operated, the cutter mechanism 80 is driven in response to the operation, and the roll sheet 4 is cut. At this time, in order to inform the user that the disconnection has been completed, the display content of the display unit 100b is changed from “JC-6” to “J-
6 ".

After cutting the roll sheet 4, it is necessary to remove the cut roll sheet 4 from the transport path D. In this case, whether or not the user must manually remove the roll sheet 4 is determined depending on whether or not the leading end of the roll sheet 4 has reached the fixing device 35. That is, when the leading end of the roll sheet 4 has reached the fixing device 35, the roll sheet 4 can be discharged out of the apparatus by driving the heat roller 37 and the pressure roller 38. Conversely, when the leading end of the roll sheet 4 does not reach the fixing device 35, the roll sheet 4 cannot be discharged out of the machine. The reason is as follows. That is, in the case described above, the roll sheet 4 is forcibly cut before the leading end thereof reaches the fixing device 35. Therefore, even if the roll sheet 4 can be slightly conveyed by the registration roller LL, it is necessary to convey it further. Is not possible.

It is conceivable that whether or not the leading end of the roll sheet 4 has reached the fixing device 35 is confirmed by, for example, a user opening a main body cover or the like. Also,
For example, it is conceivable that a switch is provided at a position very close to the upstream side of the fixing device 35 in the transport direction K, and the microcomputer 200 determines whether the switch is on or off.

Further, the leading end of the roll sheet 4 is
5, the operation of the cutter mechanism 80 is completed and the microcomputer 200 sets the fixing device 3
It is preferable that the roll sheet 4 is automatically removed by driving the discharge roller 5 and the discharge roller EL. Further, for example, a forcible discharge switch is provided on the operation unit 100, and in response to the operation of the forcible discharge switch, the fixing device 3
5 and the discharge roller EL may be driven to automatically remove the roll sheet 4.

The processing to be performed after the cut of the roll sheet 4 includes the removal of the cut roll sheet 4 and the rewinding of the roll sheet 4 drawn from the cut roll bodies 4A to 4C. There is. Specifically, the microcomputer 200 turns on the sheet feeding motor PFM and the rewind clutch RWCL after the driving of the cutter mechanism 80 is completed. As a result, the rewind roller RL
Is driven, and the roll sheet 4 pulled out from the roll bodies 4A to 4C is rewound. The drive of the rewind roller RL is stopped when the leading end of the roll sheet 4 pulled out from the roll main bodies 4A to 4C is at the home position (a position near the upstream of the leading end detection switch RDLSW in the transport direction K).

As described above, according to the copying machine of the first embodiment, when the power is turned off after the power is turned off due to a power failure or the like during the copying operation, the roll sheet 4 is cut off before the power is turned off. It is checked whether or not it has been disconnected, and if it has not been disconnected, the fact is displayed.
Only by checking the displayed contents, it is possible to easily determine whether or not it is necessary to disconnect. Therefore, the user can easily perform an appropriate subsequent procedure. Therefore, the service to the user can be improved.

FIG. 8 is a flow chart for explaining the display processing after the power is restored in the copying machine according to the second embodiment of the present invention. In the description of FIG. 8, the above-mentioned FIGS. 1 to 6 will be referred to as necessary. In the display processing after power return in the first embodiment, the power supply is turned off based on whether or not the roll sheet 4 remaining in the transport path D remains at the same position even after being transported by a predetermined length. While it is checked whether or not the roll sheet 4 has been cut before, in the display processing after the return of power in the second embodiment, it is determined whether or not the rotary blade 82 of the cutter mechanism 80 is at the home position. Based on the roll sheet 4 before power off
Is to check whether or not the connection has been disconnected.

Here, with reference to FIG. 9, the state where the rotary blade 82 is at the home position will be described. After the cutting of the roll sheet 4, the rotary blade 82 remains at the position shown in FIG. In this state, when the roll sheet 4 is transported in the transport direction K (FIG. 9B), the rotating blade 82 is synchronized with the timing at which the leading end of the roll sheet 4 is bitten by the registration roller LL. It is driven and stopped at the home position (FIG. 9 (c)). That is, the preparation for cutting is prepared. Thereafter, the rotary blade 82 is driven in accordance with the transport timing of the document 9 (FIG. 9D). As a result, the roll sheet 4 is cut. Thereafter, the rotary blade 82 is moved to the position shown in FIG.
Stop at the position shown in.

As described above, the case where the rotary blade 82 is at the home position indicates that the rotary blade 82 is ready for cutting. A cutter home position switch CHPSW is provided at a position corresponding to the home position. Cutter home position switch CHP
SW is a switch that is turned on when the rotary blade 82 is present, and is turned off when the rotary blade 82 is not present. The output of the cutter home position switch CHPSW is provided to the microcomputer 200 as described above.

Next, with reference to FIG. 8, a display process after the power is restored in the second embodiment will be described. After the power is turned off, the microcomputer 200 determines whether or not the power is turned on (step T).
1). As a result, when it is determined that the power has been turned on and returned, it is determined whether or not the rotary blade 82 is waiting at the home position based on the output of the cutter home position switch CHPSW (step T2). As a result, when it is determined that the rotary blade 82 is waiting at the home position, it is determined that the cutting of the roll sheet 4 has not been executed, and the above-described “JC-6” is displayed on the display unit 100a (step T3). On the other hand, if it is determined that the rotary blade 82 is not waiting at the home position, “READY” is set based on ON / OFF of the registration switch RSW, the conveyance switch PCSW, or the discharge switch ESW.
Alternatively, “J-6” is displayed on the display unit 100a (steps T4 to T8).

As described above, according to the copying machine of the second embodiment, it is determined based on the position of the rotary blade 82 whether or not the cutting of the roll sheet 4 was performed before the power was turned off.
If it has not been disconnected, a message to that effect is displayed, so that the service to the user can be improved as in the copying machine of the first embodiment. Although the embodiment of the present invention is as described above, the present invention is not limited to the above embodiment. For example, in the first and second embodiments, after the power is restored, “JC-6” or the like is displayed on the display unit 100a to notify the user of the internal state of the copying machine. Please operate the tip cut key. "To notify the user of the state inside the copying machine. Further, the user may be notified of the internal state of the copying machine based on the volume of a sound emitted from a buzzer or the like.

Various other design changes can be made within the scope described in the claims.

[0077]

As described above, according to the copying machine of the present invention, when the power is turned off after the power is turned off during the execution of the copying operation, the roll sheet during the execution of the copying operation before the power is turned off is returned. If the disconnection has not been performed,
Since this is notified, the user can easily determine whether it is necessary to cut the roll sheet only by checking the content of the notification. Therefore, it is possible to appropriately and easily perform the measures after the power is restored. Therefore, the service to the user can be improved.

According to the second aspect of the present invention, if the roll sheet remains on the transport path after the power is restored, whether the roll sheet remains at the same position even after being transported by a predetermined length. Whether the roll sheet was cut before the power was turned off,
It is possible to reliably determine whether or not the roll sheet has been cut.

According to the copying machine of the third aspect, after the power is restored, whether or not the roll sheet has been cut before the power is turned off is determined based on whether or not the cutting means is in a cutting ready state. Is determined, it can be reliably determined whether or not the roll sheet has been cut.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an internal configuration of a copying machine according to a first embodiment of the present invention.

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

FIG. 3 is a perspective view showing an external configuration of the copying machine at the time of copying.

FIG. 4 is a plan view showing an operation unit provided in the copying machine.

FIG. 5 is a block diagram showing an electric configuration of a control circuit provided in the copying machine, in particular, a control circuit related to conveyance of a roll sheet.

FIG. 6 shows the operation of the copier after setting a roll sheet;
6 is a timing chart showing a normal copying operation.

FIG. 7 is a flowchart for explaining a display process after the power is restored when the power is restored after the power is turned off during the execution of the copying operation.

FIG. 8 is a flowchart illustrating a display process after power is restored in a copying machine according to a second embodiment of the present invention.

FIG. 9 is a diagram for specifically explaining the operation of the cutter mechanism.

[Explanation of symbols]

 PSW power switch 4 roll sheet 4A to 4C roll sheet body D transport path K transport direction FL paper feed roller HL transport roller LL registration roller HL discharge roller 80 cutter mechanism 100a display unit 100b tip cut key 200 microcomputer RSW registration switch PCSW transport switch ESW Eject switch

Continuation of the front page (56) References JP-A-3-284972 (JP, A) JP-A-6-135597 (JP, A) JP-A-57-6860 (JP, A) JP-A-1-157348 (JP) (U, U) Shokai 57-11540 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/00 522 G03G 15/00 510 B41J 11/70 G03G 21/00 370 G03G 21/00 386

Claims (3)

(57) [Claims] In a state where a power supply is turned on, a roll sheet is pulled out from a roll body and is conveyed in a predetermined conveyance direction along a conveyance path. The roll sheet being conveyed is formed by an electrophotographic method. A copying machine capable of performing a series of copying operations for transferring the transferred original image, cutting the roll sheet being conveyed by cutting means at a predetermined timing, and discharging the cut roll sheet. After the power is turned off during execution of the copying operation, a return determining means for determining whether or not the power is turned on. During the copying operation, the cutting means determines whether or not cutting of the roll sheet has been performed by the cutting means. Copier, characterized in that it comprises a notifying means. 2. The disconnection determining means determines whether the roll sheet is present at a position near the downstream side of the cutting means in the transport direction when the return determining means determines that the power supply has been restored. When the first determination means determines that the roll sheet is present at a position near the downstream side in the transport direction of the cutting means, the first determination means moves the roll sheet along the transport path. Transport control means for transporting the roll sheet by a predetermined length in the transport direction, and after the roll sheet has been transported by the predetermined length by the transport control means, whether the roll sheet exists at a position near the downstream side of the cutting means in the transport direction. A second determining means for determining whether or not the roll sheet has been conveyed by a predetermined length, and the roll sheet is located at a position near the cutting direction downstream of the cutting means. Wherein it is determined that the cutting of the roll sheet by the cutting means has not been executed during the execution of the copying operation before the power is turned off. 2. The copying machine according to 1. 3. The disconnection determination means includes a preparation state determination means for determining whether the disconnection means is in a disconnection preparation state when the power return is determined by the return determination means. When the cutting means is determined to be in the cutting preparation state by the state determining means, it is determined that the cutting of the roll sheet by the cutting means has not been performed during the execution of the copying operation before the power is turned off. The copying machine according to claim 1, wherein: