JP3287882B2 - Control method of thermal developing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a heat developing device in a heat developing type diazo copying machine.

[0002]

2. Description of the Related Art Conventionally, in a heat developing type diazo copying machine, a heater for heating a heating rotary cylinder and a fluorescent lamp for exposure are turned on simultaneously with turning on a power supply to start up the machine. It is known that the fluorescent lamp for exposure stabilizes to the amount of light that can be actually used in 30 seconds to 1 minute. On the other hand, the heater is generally disposed inside the heating rotary cylinder, and does not directly heat the thermal paper, but radiatively heats the inner surface of the heating rotary cylinder to conduct heat conduction to the temperature of the surface (outer surface) of the heating rotary cylinder. And heat development is performed by bringing the photosensitive paper into close contact with the surface of the heating rotary cylinder by a belt or a group of rollers.

[0003]

In the above-mentioned heat developing type diazo copying machine, the machine is started up by turning on the heater for heating the heating rotary cylinder and the fluorescent lamp for exposure simultaneously with turning on the power. Therefore, the heating rotary cylinder itself has a large heat capacity, so that it takes 5 to 8 minutes for the surface temperature of the heating rotary cylinder to reach an appropriate temperature at which heat development is possible, and there is a drawback that the waiting time is long.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling a heat developing apparatus which can solve the above-mentioned drawbacks and can reduce the waiting time until the heated rotary cylinder reaches a set temperature.

[0005]

In order to achieve the above-mentioned object, according to the present invention, there is provided an exposure light source, a light source lighting means for lighting the exposure light source, and a first light source which is individually turned on / off. In a method of controlling a heat developing device in a heat developing type diazo copying machine having a heater and a heat source having a second heater, the power consumption of the second heater is made substantially equal to the power consumption of the light source for exposure. And the second heater are selectively turned on.

According to a second aspect of the present invention, in the control method of the thermal developing apparatus according to the first aspect, the time required for the surface temperature of the heating rotary cylinder in the thermal developing type diazo copier to reach a set temperature is the same as the above. The light source for exposure is turned off and the second heater is turned on.

[0007]

FIG. 2 shows an example of a diazo copying machine to which the present invention is applied. The copying operation is performed by the paper (sheet-like recording material) 1 and the original being discharged to the copy tray 7 and the original tray 8 via the paper feed unit 2, the exposing unit 3, the separating unit 4, the transporting unit 5, and the developing unit 6, respectively. Will be

As shown in FIG. 3, in the paper feeding section 2, the first feed roller pair 11 includes a drive roller 11a and a driven roller 11b which can be separated from and separated from each other, and the drive roller 11a is driven by a driving means. It is always driven to rotate. Manuscript 9
Is inserted from the entrance of the paper feed table 10, the original 9 has passed through the first feed roller pair 11 in which the driven roller 11b is separated from the drive roller 11a and retracted from the original transport path. Later, it is detected by the detecting means 13 at a position of 0 to 3 mm upstream of the first stopper 12 which can come and go and waits in the "going out" state, and the first stopper 12 goes out of the way.
And the driven roller 11b is driven
The document 1 is pressed against the document 1a via the document 9 and the conveyance of the document 9 along the document conveyance path is started.

At the same time, the uppermost sheet-shaped recording material 1 of the sheet-shaped recording material bundle stored in the paper storage cassette 14 starts to be conveyed by a feed roller 15 for a predetermined distance, and the sheet It is conveyed along the shape recording material conveying path. Here, the paper storage cassette 14 is configured such that a movable portion of a detachable lid member is opened, and a sheet feeding roller 15 is provided at a portion of the open region that is not covered with the shielding member.
Is brought into contact with the sheet-like recording material bundle.

The document 9 and the sheet-shaped recording material 1 are merged and overlapped through the document conveyance path and the sheet-shaped recording material conveyance path, respectively, and guided to the merged conveyance path. The second feed roller pair 16 is composed of a drive-side roller 16a and a driven-side roller 16b that can be brought into contact with and separated from each other, and the drive-side roller 16a is constantly driven to rotate by a driving unit. The driven-side roller 16b is provided integrally with the second stopper 17 that can be retracted and
It is rotatably supported at a substantially intermediate point with the stopper 17.

The second stopper 17 is in the "out" state in which it has advanced to the merged conveyance path, the driven roller 16b is separated from the driving roller 16a, and the superimposed document 9 and sheet-like recording material 1 After the second stopper 17 abuts on the second stopper 17 and is aligned with the leading end, the second stopper 17 is retracted from the merged conveyance path and is in a “submerged” state, and the driven-side roller 16 b
Is pressed against the drive roller 16a via the original 9 and the sheet-shaped recording material 1, whereby the original 9 and the sheet-shaped recording material 1 are conveyed to the exposure unit 3 in a superposed state.

In the exposure section 3, the endless belt 18 includes a driving roller 19, a pulling roller 20, and an idle roller 21.
Then, the cylinder glass 22 is hung over the transparent cylinder glass 22, and the cylinder glass 22 is rotatably positioned by the endless belt 18 and the cylinder receiving roller 23. A fluorescent lamp 24 for exposure is held inside the cylinder glass 22 by holding means (not shown), and the fluorescent lamp 24 for exposure is turned on by a fluorescent lamp lighting device described later. The document 9 and the sheet-like recording material 1 in the superposed state conveyed from the paper feeding section are conveyed while being sandwiched between the endless belt 18 and the cylinder glass 22, and are conveyed from the fluorescent lamp 24 for exposure via the cylinder glass 22. The image of the original 9 is exposed on the sheet-shaped recording material 1 by the applied light energy, and a latent image is formed on the sheet-shaped recording material 1.

In the separation section 4, the pick-off plate 25 is urged against the cylinder glass 22 by urging means (not shown), and the exposed original 9 and the sheet-like recording material 1 after the exposure are introduced into the separation section by the pick-off plate 25. And separated by the document suction side and the sheet-like recording material suction side. The original adsorbing side is constituted by an original adsorbing plate 26, a driving roller 27 and a driven roller 28 supported by the original adsorbing plate 26, and a transport belt 29 wrapped around these. The suction plate 30 abuts the sheet-shaped recording material 1 at a position substantially opposite to the original-side neutral holding member of the document suction plate 26 to separate the sheet-shaped recording material 1 from the sheet-shaped recording material suction plate 30 by a predetermined minute interval. A sheet-shaped recording material-side neutral holding member. The document suction plate 26 and the sheet-shaped recording material suction plate 30 generate a preset negative pressure by a suction fan (not shown), and separate the document 9 and the sheet-shaped recording material 1 by sucking and transporting them.

In the transport section 5, the original 9 is separated from the separation section 4 by a reverse roller 31 which rotates counterclockwise to facilitate discharging the original 9 and an original transport roller 32 which is in contact with the transport belt 29. The sheet-shaped recording material is discharged to the tray 8 and is in contact with the sheet-shaped recording material suction plate 30, a pair of relay conveyance rollers 34, a pair of return rollers, and a guide member group that fills the gap between these rollers. The material 1 is guided from the separating section 4 to the developing section 6.

In the developing section 6, an endless belt 39 is wound around a drive roller 35, a tension roller 36, and idle rollers 37 and 38, and rotation holding means 40 and 41 rotatably supported by left and right plates and endless belts. 39 holds the heated rotary cylinder 42. This heated rotary cylinder 42
A first heater 43 and a second heater 44 are disposed in the inside, and the first heater 43 and the second heater 44 are on / off controlled by control means described later, and the heating rotary cylinder 42 is heated from the inside. The surface temperature of the heating rotary cylinder 42 is detected by a temperature sensor 45, and an excessive rise in the temperature of the heating rotary cylinder 42 is prevented by a safety means 46 including a temperature fuse.

The sheet-like recording material 1 from the conveying section 5 is conveyed while being held between an endless belt 39 and a heating rotary cylinder 42, and is heated and developed by the heating rotary cylinder 42. The pick-off plate 47 is heated by the urging means (not shown).
The sheet-shaped recording material 1 which has been urged to the peripheral surface to complete the heat development is guided to a paper discharge roller 48, and the sheet-shaped recording material 1 is discharged as a copy to the copy tray 7 by the paper discharge roller 48.

FIG. 1 shows a circuit configuration of the digital copying machine. The exposure fluorescent lamp 24 is driven by a fluorescent lamp lighting device 49, and a relay 50 is turned on / off from a control device 51.
Turning on / off the power supply to the fluorescent lamp lighting device 49 from the 100 V commercial AC power supply 52 by the OFF signal turns on / off the exposure fluorescent lamp 24. The control device 51 changes the on / off signal to the relay 50 according to the mode.

The relays 53 and 54 turn on and off the power supplied from the commercial AC power supply 52 to the first heater 43 and the second heater 44, respectively, according to an on / off signal from the control device 51. The relays 53 and 54 are controlled such that the surface temperature of the heating rotary cylinder 42 becomes a temperature arbitrarily set in advance by a signal from the temperature sensor 45 slidably and elastically pressed. In this case, the control device 51 changes the on / off condition of the relays 53 and 54 depending on the mode. The temperature fuse 46 is connected to the first heater 43,
It is connected in series with the second heater 44 to prevent an excessive rise in the surface temperature of the heating rotary cylinder 42.

FIGS. 4 to 6 are flowcharts showing the processing flow of the control unit 51. When the main power supply of the machine is turned on, the control device 51 starts execution of the program as shown in FIG. 4A, performs initial setting in step n1, a port input routine in step n2, and a mode change request control in step n3. A routine, a heater and fluorescent lamp control routine in step n4, a port output routine in step n5, and other control subroutines are executed.

In the heater and fluorescent lamp control routine in step n4, the controller 51 switches the mode according to the value of the mode counter as shown in FIG. 4B. That is, the control device 51 sets the heat-up mode when the mode counter is 0 (n7), sets the copy mode when the mode counter is 1 (n8), sets the heat hold mode when the mode counter is 2 (n9), and sets the mode counter to n. 3 is set to the auto shut-off mode (n1
0). The controller 51 changes the value of the mode counter to the mode change request control routine of step n3 and step n4.
In the heater and fluorescent lamp control routine. The initial setting value of the mode counter is 0, and when the main power supply of the machine is turned on, the apparatus enters a heat-up mode. After that, the mode is switched to each mode depending on the machine state.

The heat-up mode is a mode in which the heating rotary cylinder 42 is heated to an arbitrarily set temperature by the first heater 43 and the second heater 44, and the second heater 44 consumes substantially the same power as the exposure fluorescent lamp 24. It was done. In the heat-up mode, the control device 51 operates as shown in FIG.
As shown in (c), at step n11, the relay 50 is controlled to turn off the exposure fluorescent lamp 24, and at step n12
It is determined whether or not the current surface temperature of the heating rotary cylinder 42 has reached an arbitrarily set temperature based on a signal from the temperature sensor 45, and if the surface temperature of the heating rotary cylinder 42 has not reached the set temperature, In order to reduce the waiting time due to the heating of the heating rotary cylinder 42, the relay 5
3 and 54 to control the first heater 43 and the second heater 44
Is turned on, the heating rotary cylinder 42 is heated. When the surface temperature of the heating rotary cylinder 42 has reached the set temperature, the controller 51 controls the relays 53 and 54 in step n14 to keep the first heater 43 on and turn off the second heater 44. Then, the heating rotary cylinder 42 is heated, and in step n15, 1 is set in the mode counter to enter the copy mode.

The copy mode is a mode in which copying is actually performed, in which the exposure fluorescent lamp 24 is turned on instead of the second heater 44, and the surface temperature of the heating rotary cylinder 42 is kept at a constant temperature, for example, an appropriate temperature. First heater 43 so as to keep the width
Is a mode for turning on / off. In the copy mode, as shown in FIG. 5A, the control device 51 determines in step n16 whether or not there has been a mode change request by the mode change request control routine in step n3, and if there is no mode change request, step n17. Control of the relay 50 to turn on the fluorescent lamp 24 for exposure, and
It is determined from the signal from the temperature sensor 45 whether or not the current surface temperature of the heating rotary cylinder 42 is higher than an appropriate temperature range. If the surface temperature of the heating rotary cylinder 42 is higher than the appropriate temperature range, step n19 is performed. By controlling the relay 53 to turn off the first heater 43, the heating of the heating rotary cylinder 42 is stopped.

If the surface temperature of the heating rotary cylinder 42 is not higher than the appropriate temperature range, the controller 51 determines in step n20 that the surface temperature of the heating rotary cylinder 42 is higher than the appropriate temperature range by a signal from the temperature sensor 45. It is determined whether the temperature is low or not. If the surface temperature of the heating rotary cylinder 42 is lower than the appropriate temperature range, the relay 53 is controlled in step n21 to control the first temperature.
The heating rotary cylinder 42 is heated by turning on the heater 43. When a mode change request is made, the controller 51 sets 2 to a mode counter in step n22 and enters another mode such as a heat hold mode.

In the heat hold mode, the first heater 43 is not turned off when the copying operation is completed, and the heating rotary cylinder 42 is not cooled. Instead, a time management for an arbitrary fixed time, for example, 1 to 10 minutes, is performed by a timer routine. By keeping the surface temperature of the heating rotary cylinder 42 as an arbitrary set temperature lower than the appropriate temperature as a standby temperature, the heating time of the heating rotary cylinder 42 at the time of shifting to the copying operation again is reduced, and power is saved. Mode.

In the heat hold mode, the controller 51 controls the relay 50 in step n23 to turn off the exposure fluorescent lamp 24 in step n23, as shown in FIG.
In step 24, it is determined whether or not a mode change request has been made by the mode change request control routine in step n3. If no mode change request has been made, the surface temperature of the heating rotary cylinder 42 is adjusted appropriately based on a signal from the temperature sensor 45 in step n25. It is determined whether or not the temperature is higher than
If the surface temperature of is higher than the appropriate temperature range, step n
At 26, the heating of the heating rotary cylinder 42 is stopped by turning off the first heater 43 by controlling the relay 53.

If the surface temperature of the heating rotary cylinder 42 is not higher than the appropriate temperature range, the controller 51 determines in step n27 that the surface temperature of the heating rotary cylinder 42 has exceeded the appropriate temperature range by a signal from the temperature sensor 45. It is determined whether the temperature is low or not. If the surface temperature of the heating rotary cylinder 42 is lower than the appropriate temperature range, the relay 53 is controlled in step n28 to perform the first
The heating rotary cylinder 42 is heated by turning on the heater 43. When the mode change request is received, the controller 51 determines whether the mode counter is set to 0 or 3 in step n29, and sets 0 or 3 in the mode counter.
Is set, and the mode corresponding to the mode counter is entered.

In the auto shut-off mode, step n9
This is a mode in which a time is managed for an arbitrary fixed time, for example, 60 minutes by a timer routine not described in the heat hold mode, and the mode is entered when there is no mode change request in the arbitrary fixed time. Heater 43
Is turned off (the second heater 44 and the exposure fluorescent lamp 24 are already off) to save power.

In the auto shut-off mode, the controller 51 controls the relay 50 in step n30 to turn off the fluorescent lamp 24 for exposure as shown in FIG.
In step 1, it is determined whether or not there is a mode change request by the mode change request control routine in step n3. If there is no mode change request, the relay 53 is controlled in step n32 to turn off the first heater 43, thereby heating. The heating of the rotary cylinder 42 is completely stopped, and when there is a mode change request, the mode counter is set to 0 in step n33 to enter the heat-up mode.

In this example, the fluorescent lamp 24 for exposure and the second heater 44 whose power consumption is substantially equal to the fluorescent lamp 24 for exposure are selectively turned on.
The surplus power available within the capacity of the
To the second heater 44, and the waiting time until the surface temperature of the heating rotary cylinder 42 reaches an arbitrarily set temperature can be reduced.

[0030]

As described above, according to the present invention, an exposure light source, a light source lighting means for lighting the exposure light source, and a heat source having first and second heaters which are individually turned on / off. Wherein the power consumption of the second heater is substantially equal to the power consumption of the exposure light source, and the exposure light source and the second heater are selectively used. , The waiting time until the heated rotary cylinder reaches the set temperature can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of an example of a diazo copying machine to which the present invention is applied.

FIG. 2 is a sectional view showing the diazo copying machine.

FIG. 3 is a sectional view showing the diazo copying machine.

FIG. 4 is a flowchart showing a part of a processing flow of a control device in the diazo copying machine.

FIG. 5 is a flowchart showing another part of the processing flow of the control device.

FIG. 6 is a flowchart showing another part of the processing flow of the control device.

[Explanation of symbols]

 24 Exposure fluorescent lamp 43 First heater 44 Second heater 42 Heated rotating cylinder 50, 53, 54 Relay 51 Controller 45 Temperature sensor

Continuation of front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 27/14 G03D 13/00

Claims (2)

(57) [Claims] 1. A heat developing type diazo copier having an exposure light source, light source lighting means for lighting the exposure light source, and a heat source having a first heater and a second heater which are individually turned on / off. In the method for controlling a developing device, the power consumption of the second heater is made substantially equal to the power consumption of the exposure light source, and the exposure light source and the second heater are selectively turned on. How to control the device. 2. A control method for a thermal developing apparatus according to claim 1, wherein the exposure light source is turned off while the surface temperature of the heating rotary cylinder in the thermal developing diazo copying machine reaches a set temperature. A method for controlling a heat developing device, comprising turning on a second heater.