JPH06282059A - Heating device for sheet-like recording material - Google Patents

Abstract

PURPOSE:To prevent the temperature of a heating surface out of a paper passing range from excessively rising by respectively turning on/off plural bar-like heating elements whose constitution is different and which are provided on the inside of a rotary cylinder heating a sheet-like recording material carried along the cirumferential surface thereof. CONSTITUTION:A photosensitive paper guided to a developing unit is carried while being interposed between an endless belt and the heating rotary cylinder 6. The bar-like heating elements 57a and 57b provided on the inside of the cylinder 56 are arranged in positions different from each other so that the central area of the cylinder 56 is heated by the heater 57ah of the element 57a and both end areas of the cylinder 56 are heated by the heater 57bh of the element 57b. By independently controlling the elements 57a and 57b to be turned on/off, the mutually different heat generation parts of the respective elements 57a and 5b are heated and the temperature of the outside circumferential surface of the cylinder 56 in contact with the photosensitive paper is heated to the desired temperature. At this time, the temperature of the outside circumferential surface of the cylinder 56 is detected by temperature sensors 58a and 58b and temperature fuses 59a and 59b are actuated so as to prevent the temperature from excessively rising.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for a sheet-shaped recording material applied to a heat developing device of a diazo copying machine, a heat fixing device of a PPC, and the like.

[0002]

2. Description of the Related Art Conventionally, photosensitive paper and P in diazo copying machines have been used.
By heating the sheet-shaped recording material such as transfer paper on the PC,
A sheet-shaped recording material heating device is used as a means for developing a latent image on a photosensitive paper and fixing a toner image on a transfer paper. In this heating device for sheet-shaped recording material, it is necessary to maintain the heating surface temperature uniformly in order to prevent development unevenness and fixing unevenness due to a local temperature difference of the heating surface for heating the sheet-shaped recording material. is there.

In this sheet-shaped recording material heating apparatus, as a method for making the heating surface temperature uniform, conventionally, a direction perpendicular to the traveling direction of the sheet-shaped recording material (photosensitive paper) is provided on the back surface of a curved heating table. , Fins parallel to each other are provided, and a heating element (heater) serving as a heating source is provided between the fins.
To improve the heat conduction of the heating table across the sheet-shaped recording material (Japanese Utility Model Publication No. 44-540), or by providing a sheet-shaped heating element on the heating surface. A method has been proposed in which the heating surface is made denser at the edges of the heating surface than in the central portion thereof to make the temperature distribution in the width direction of the heating surface uniform (JP-A-63-228155). There is.

[0004]

However, each of the conventional heating devices configured to equalize the heating surface temperature of the sheet-shaped recording material by the above-mentioned method has the following drawbacks. That is, in the former heating device of the related art, when a sheet-shaped recording material (small size paper) having a relatively small width with respect to the width of the heating surface is continuously passed, within the sheet-passing range of the sheet-shaped recording material. It is difficult to make the heating surface temperature difference between the heating surface and the outside of the paper-passing range uniform only by relying on the heat conduction of the fins. If the surface temperature outside the range continues to rise, the peripheral parts are damaged, or if large size paper is passed after continuously passing small size paper, the high temperature part outside the paper passing range of small size paper However, there is a defect that the quality of the developed image is deteriorated due to the deviation of the surface temperature in the width direction of the heating surface. Further, in the latter heating device of the related art, when small-size paper is continuously fed, when the heating temperature of the central portion of the heating surface with low density of the heating element is kept at an appropriate temperature, Both ends of the heating surface with a high density, that is, the temperature rise outside the paper-passing range of the small-sized paper becomes too large, so when passing the small-sized paper continuously and then the large-sized paper, There is a drawback that the image quality at both ends of large size paper is degraded. The present invention has been made in view of the above-mentioned points, and an object thereof is to uniformly maintain the surface temperature in the heating surface width direction during the continuous passage of small size paper, and the paper passing range of the small size paper. Another object of the present invention is to provide a heating device for a sheet-shaped recording material, which can prevent an excessive rise in the temperature of the outer heating surface. Another object of the present invention is to prevent excessive rise in temperature of the heating surface outside the paper feeding range of small-sized paper, thereby preventing damage to peripheral parts due to excessive rise of the heating surface, and continuous feeding of small-sized paper. It is an object of the present invention to provide a heating device for a sheet-shaped recording material, which is capable of improving the image quality of large-sized paper after that, improving the heating efficiency of the heating surface, and reducing the power consumption of the heating element.

[0005]

In order to solve the above-mentioned problems, the present invention provides a heating rotary cylinder for heating a sheet-shaped recording material conveyed along a peripheral surface, and an inside of the heating rotary cylinder. A heating device for a sheet-shaped recording material, comprising a first rod-shaped heating element and a second rod-shaped heating element, which can be turned on / off independently of each other, and a heating portion of the first rod-shaped heating element. And the heat generating portion of the second rod-shaped heat generating element are configured to be different from each other.

According to the present invention, in order to solve the above problems, the power consumption of each of the first rod-shaped heating element and the second rod-shaped heating element is the maximum power that can be used in the mounting machine. Yes, the on / off control is performed selectively with each other.

[0007]

According to the present invention, since the heat generating portion of the first rod-shaped heating element and the heat generating portion of the second rod-shaped heating element are different from each other, the first rod-shaped heating element is turned on. In the state, only the region (for example, the central portion of the heating rotary cylinder) corresponding to the heating portion of the first rod evaporation heat body of the heating rotary cylinder is heated, and the second rod-shaped heat generator is turned on. In the state, only the region (for example, both ends of the heating rotary cylinder) corresponding to the heat generating portion of the second rod evaporation heat body of the heating rotary cylinder is heated. Therefore, these first rod-shaped heating element and second
The heating surface of the heating rotary cylinder is divided into a plurality of regions to be heated by individually controlling ON / OFF of each of the rod-shaped heating elements.

Further, according to the present invention, the first rod-shaped heating element and the second rod-shaped heating element are selectively turned on / off with each other at the maximum electric power that can be used in the mounting machine. The heating surface of the cylindrical body is divided into a plurality of regions to be heated more rapidly.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The heating device for the sheet-shaped recording material according to the present invention can be used for both the diazo copying machine and the PPC as described above. Here, the diazo copying machine will be described as an example.

As shown in FIG. 1, the diazo copying machine according to this embodiment is composed of a paper feeding unit A, an exposing unit B, a separating unit C, a conveying unit D, and a developing unit E. 1 and a sheet-shaped recording material (hereinafter referred to as photosensitive paper 2) are subjected to a process of paper feeding-exposure-separation-conveyance-development, and an image of the original 1 is copied onto the photosensitive paper 2.

FIG. 2 is a schematic sectional view for explaining the detailed structure of each unit. First, the paper feeding unit A
The configuration and operation of will be described. In FIG. 2, when a document 1 is inserted from the entrance of the paper feed table 3 into the document transport unit, the document 1 is composed of a pair of driving side rollers 4a and a driven side roller 4b which can be brought into contact with and separated from the driving side rollers 4a. It passes through the first feed roller 4. At this time, the first feed roller 4 is in a separated state in which the driven side roller 4b is retracted from the conveyance path and only the drive side roller 4a is constantly rotated.

The original 1 that has passed the first feed roller 4 is
It is detected by the detection means 6. As a result, the first stopper 5 that can be retracted and retracted from the document transport path is retracted from the document transport path, and the driven side roller 4b of the first feed roller 4 which is in the separated state is pressed against the drive side roller 4a. do it,
The conveyance of the original 1 is started.

On the other hand, at the same time when the original 1 is fed, the photosensitive paper 2 stored in the paper storage cassette is conveyed by the paper feed roller 7 by a preset distance. This allows
The original 1 inserted from the paper feed table 3 and the photosensitive paper 2 fed from the paper storage cassette are guided to the merging / conveying path.

A pair of second feed rollers 8 are provided in the merged conveyance path so that the driven roller 8b can move to the separated position with respect to the drive roller 8a. Here, the driven-side roller 8b is rotatably supported at one end of a supporting member whose substantially center is swingably supported, and a second stopper 9 is formed at the other end of the supporting member. Has been done.
In a normal state, this supporting member is rockingly biased to a position shown in FIG. 2 by a spring (not shown),
As a result, the driven roller 8b is retracted to a position separated from the driving roller 8a, and the second stopper 9b
Moves to a position where the originals 1 and the photosensitive paper 2 conveyed through the merge conveyance path are prevented from passing through.

As a result, the original 1 and the photosensitive paper 2 are conveyed, and the front ends of the original 1 and the photosensitive paper 2 are brought into contact with the second stopper 9, whereby the front ends of the original 1 and the photosensitive paper 2 are aligned.
In this state, for example, a solenoid (not shown) operates,
The support member swings counterclockwise in FIG.
The stopper 9 is retracted to the outside of the conveyance path, and the driven roller 8b is brought into pressure contact with the driving roller 8a. As a result, the original 1 and the photosensitive paper 2 are conveyed to the exposure unit B in a state where the leading ends of the original 1 and the photosensitive paper 2 are overlapped with each other.

The exposure unit B includes a driving roller 10, a pulling roller 11, an idle roller 12, an endless belt 13 stretched between the rollers, and a cylinder receiving roller 1.
4, a transparent cylinder glass 15 rotatably positioned and supported by the cylinder receiving roller 14, and a fluorescent lamp 16 held inside the cylinder glass 15 by a holding means (not shown).

The original 1 and the photosensitive paper 2 conveyed to the exposure unit B are exposed by the fluorescent lamp 16 while being sandwiched between the endless belt 13 and the cylinder glass 15. As a result, the light energy of the fluorescent lamp 16 transmitted through the image portion (transparent portion) formed on the original 1 causes
An image of the document 1 is formed as a latent image on the photosensitive paper 2 having photosensitivity. The photosensitive paper 2 on which the latent image is formed in this manner is conveyed to the next separation unit C together with the original document 1 superposed thereon.

The separation unit C is provided with a pick-off plate 17 which is biased toward the cylinder glass 15 by a biasing means (not shown) so that the exposed original 1 and the photosensitive paper 2 can be separated from each other. The pick-off plate 17 guides the separation unit to the next section. A document suction plate 18, a drive roller 19 rotatably supported by the document suction plate 18, and a document suction plate 18 are also rotatably supported by the document suction plate on the side of the separation unit introduction portion facing the document 1. The driven roller 20 and the conveyor belt 21 stretched between these rollers.
And are provided.

On the other hand, the photosensitive paper 2 in the separation unit introduction section
The photosensitive paper suction plate on the side facing the
And a photosensitive paper neutral holding member for separating the photosensitive paper 2 from the photosensitive paper suction plate 22 by an arbitrary minute distance. Further, the document suction section and the photosensitive paper suction section are configured to generate preset negative pressures by suction fans (not shown), and the document 1 and the photosensitive sheet 2 are sucked by these document suction sections. And the photosensitive paper suction portion are conveyed while being sucked by the respective negative pressures, so that they are separated from each other.

The original 1 and the photosensitive paper 2 thus separated are conveyed to the next conveying unit D. The transport unit D includes a reverse roller 23 that rotates counterclockwise in FIG. 2 in order to easily eject the document 1.
A document transport roller 24 that discharges the document 1 out of the copying machine by rotating it while contacting the transport belt 21, a photosensitive paper transport roller 25 that contacts the photosensitive paper suction plate 22, and a pair of relay transport rollers 26. The transport unit D is composed of a group of guide members provided between the rollers.
Thus, the original 1 is discharged to the outside of the copying machine, and the photosensitive paper 2 separated from the original 1 is guided to the next developing unit E.

The developing unit E is equipped with a heating device according to the present invention for heating the photosensitive paper 2 on which the latent image has been formed by the exposure unit B to develop the latent image on the photosensitive paper 2 to make it visible. . As shown in FIG. 2, the heating device includes an endless belt 53 stretched between a driving roller 50, a pulling roller 51, and an idle roller 52, and a rotation rotatably supported by left and right side plates of a diazo copying machine. The holding means 55, the heating rotary cylinder 56 rotatably held by the rotary holding means 55, the first rod-shaped heating element 57a disposed inside the heating rotary cylinder 56, and the heating rotary cylinder 56 similarly. A second rod-shaped heating element 57b disposed inside the heating element, and heating temperature detection means 58 for detecting the heating temperature of the heating rotary cylinder 56 heated to a desired arbitrary temperature by each of the rod-shaped heating elements 57a and 57b. A safety means 59 for preventing the heating temperature of the heating rotary cylinder 56 from rising excessively.

The photosensitive paper 2 guided to the developing unit E in FIG. 2 has a heating rotary cylinder 56 rotated by an endless belt 53 which is rotationally driven, so that the endless belt 53 and the heating rotary cylinder 56 are separated from each other. It is transported while being held in between. Here, the heating rotary cylinder 56 has a first rod-shaped heating element 57a and a second rod-shaped heating element 57 which are disposed inside thereof.
b and b are independently controlled to be turned on / off, so that different heat generating portions of the rod-shaped heat generating elements 57a and 57b are heated, so that the outer peripheral surface in contact with the photosensitive paper 2 has a desired temperature. It is heated up to. At this time, the temperature of the outer peripheral surface of the heating rotary cylinder 56 is detected by the heating temperature detecting means 58, and is controlled by the safety means 59 so that the temperature does not rise excessively.

As a result, in this heating and developing apparatus, the heating and rotating cylinder 56 is heated to a desired temperature suitable for development and is rotated counterclockwise in FIG. 2 by the endless belt 53. The photosensitive paper 2 on which the latent image is formed is received between the outer peripheral surface of the heating rotary cylinder 56 and the endless belt 53. Then, the photosensitive paper 2 is conveyed while being held between the outer peripheral surface of the heating rotary cylinder 56 and the endless belt 53, and is heated in the conveying process to develop the latent image.

The photosensitive paper 2 which has been heated and developed while being conveyed by the rotation of the heating rotary cylinder 56 is displaceably provided at the outlet of the developing unit E and is displaced and heated by a biasing means (not shown). The pick-off plate 60, which is urged to contact the outer peripheral surface of the rotating cylinder 56, guides it to the pair of paper ejection rollers 61, and the conveyance force of the paper ejection rollers 61 ejects it onto the copy tray 62 to complete copying. To do.

Next, the fluorescent lamp 16 and each rod-shaped heating element 57a, 57 in the heating device according to claim 1 of the present invention.
Each control circuit with b will be described. Turning on and off of the fluorescent lamp 16 for exposure is performed by turning on / off the power supplied to the fluorescent lamp lighting device 100, as shown in FIG.
Turning on / off the power supply to the fluorescent lamp lighting device 100
This is performed by the relay 101, and the ON / OFF signal of the relay 101 is output from the control device 104 and changed depending on the mode.

On the other hand, for controlling the surface temperature of the heating rotary cylinder 56, as shown in FIG. 3, the first temperature sensor 58 of the heating temperature detecting means 58 biased slidably on the heating rotary cylinder 56.
a and the signal from the second temperature sensor 58b, the controller 10
4 so that the surface temperature of the heating rotary cylinder 56 becomes an arbitrary temperature set in advance.
This is performed by turning on / off the first heater 57ah and the second heater 57bh as the heat generating portion of b.

Here, the first heater 57ah and the second heater 57b as the heat generating portions of the rod-shaped heat generating elements 57a and 57b.
The position of h is, as shown in FIG. 3, the first rod-shaped heating element 57.
The first heater 57ah of a heats the central region of the heating rotary cylinder 56, and the second heater 5 of the second rod-shaped heating element 57b.
7bh are arranged differently from each other so as to heat the regions at both ends of the heating rotary cylinder 56.

The first heater 57ah and the second heater 57bh are turned on / off by turning on / off the electric power supplied to the first heater 57ah and the second heater 57bh.
The power supply to the first heater 57ah and the second heater 57bh is switched on and off by the relay 102 which turns on / off the power supply to the first heater 57ah by a control signal and the power supply to the second heater 57bh by a control signal. The relay 103 is turned on / off by the relay 103 and the on / off signals of the relay 102 and the relay 103 are output from the control device 104, and the on / off condition is changed depending on the mode.

The safety means 59 for preventing the heating temperature of the heating rotary cylinder 56 from rising excessively is a first temperature fuse 59a for preventing the heating temperature of the central surface of the heating rotary cylinder 56 from rising excessively.
And a second thermal fuse 59b that prevents the heating temperature of the end surface of the heating rotary cylinder 56 from rising excessively.
Here, it is desirable that each of these temperature fuses 59a and 59b be connected in series with the first heater 57ah and the second heater 57bh.

The surface temperature of the heating rotary cylinder 56 is controlled as follows on the basis of a control program previously installed in the controller 104. When the main power source of the diazo copying machine is turned on, first, the program of the main routine shown in FIG. 4 is started, and after the initialization n1, the port input routine n2, the mode change request control routine n3,
Each control subroutine of the heater and fluorescent lamp control routine n4 and the port output routine n5 is executed.

Here, as shown in FIG. 5, the heater and fluorescent lamp control routine n4 is divided according to the operation mode, and the mode is switched by the mode counter (n6). This change of the mode counter is performed by the mode change request control routine n3 and the heater / fluorescent lamp control routine n4. The heat up mode n7 is used as the mode switched by the mode counter.
(Mode counter = 0), copy mode n8 (mode counter = 1), heat hold mode n9 (mode counter = 2), auto shutoff mode n10 (mode counter = 3).

The initial setting value of the mode counter is "0",
When the main power source of the diazo copying machine is turned on, the mode counter first enters the heat-up mode n7. afterwards,
The count value of the mode counter is changed according to the state of the diazo copying machine, and the mode is switched to each mode.

In the heat-up mode n7, the first heater 5 is used.
In this mode, the 7 ah and the second heater 57 bh are simultaneously turned on to heat the heating rotary cylinder 56 to an arbitrary temperature.
At this time, the sum of the power consumptions of the first heater 57ah and the second heater 57bh takes the maximum value of the rating of the heat generating portion.

In this heat-up mode n7, as shown in FIG. 6, the fluorescent lamp 16 is turned on (n11), and then the current surface temperature of the heating rotary cylinder 56 is arbitrary at both the center and both ends thereof. It is judged whether or not it is within the appropriate temperature range (n12), and here, when the current surface temperature of the heating rotary cylinder 56 is within the appropriate temperature range at both the center and both ends thereof. , "1" is set in the mode counter (n13), and the copy mode (n8 in FIG. 5) is entered.

On the other hand, here, when the current surface temperature of the heating rotary cylinder 56 is not within the proper temperature range at both the center and both ends, the first temperature is determined based on the following conditions.
The heater 57ah and the second heater 57bh are turned on / off, and the heating rotary cylinder 56 is heated so that the surface temperature of the heating rotary cylinder 56 falls within an arbitrary appropriate temperature range at both the center and both ends thereof.

That is, here, first, it is judged whether or not the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the appropriate temperature range (n14), and the surface temperature of the central portion of the heating rotary cylinder 56 is If it is judged to be higher than the proper temperature range,
The first heater 57ah is turned off (n15).

Here, when it is not judged that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the proper temperature range, the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the proper temperature range. If it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the appropriate temperature range (n16), the first heater 57ah is turned on (n1).
7) Then, the central portion of the heating rotary cylinder 56 is heated. At this time, if it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the first heater 57
Keep ah in its current state.

Next, it is judged whether the surface temperature of the end of the heating rotary cylinder 56 is higher than the proper temperature range (n18), and the surface temperature of the end of the heating rotary cylinder 56 is determined to be smaller than the proper temperature range. If it is determined to be high, the second heater 57bh is turned off (n19).

If it is not determined that the surface temperature of the end of the heating rotary cylinder 56 is higher than the proper temperature range, the surface temperature of the end of the heating rotary cylinder 56 is lower than the proper temperature range. If it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the second heater 57bh is turned on (n21) to determine whether the surface temperature of the heating rotary cylinder 56 is lower than the appropriate temperature range. Heat the end of 56. At this time, if it is not determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the second heater 57bh is maintained in the current state.

The copy mode (n8 in FIG. 5) is a mode in which actual copying is performed, with the fluorescent lamp 16 turned on, and
This is a mode in which the first heater 57ah and the second heater 57bh are turned on / off so that the surface temperature of the heating rotary cylinder 56 is kept constant, for example, kept in an arbitrary appropriate temperature range.

In this copy mode, as shown in FIG. 7, the mode change request control routine n3 determines whether or not there is a mode change request (n22), and the mode change request control routine n3 determines that there is a mode change request. In this case, the mode counter is set to "2" (n23), and another mode such as the heat hold mode n9 is entered.

Here, the mode change request control routine n3
If it is determined that there is no mode change request, the fluorescent lamp 16 is turned on (n24), and the surface temperature control of the heating rotary cylinder 56 is started.

In FIG. 7, first, it is judged whether or not the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the proper temperature range (n25), and the surface temperature of the central portion of the heating rotary cylinder 56 is proper. When it is determined that the temperature is higher than the temperature range, the first heater 57ah is turned off (n26).

Here, if it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the appropriate temperature range, the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the appropriate temperature range. If it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the appropriate temperature range (n27), the first heater 57ah is turned on (n2).
8) Then, the central portion of the heating rotary cylinder 56 is heated. At this time, if it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the first heater 57
Keep ah in its current state.

Next, it is judged whether or not the surface temperature of the end of the heating rotary cylinder 56 is higher than the proper temperature range (n29), and the surface temperature of the end of the heating rotary cylinder 56 is determined to be higher than the proper temperature range. If it is determined to be high, the second heater 57bh is turned off (n30).

Here, if it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than the proper temperature width, the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the proper temperature width. If it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the second heater 57bh is turned on (n32) to determine whether or not the heating rotary cylinder 56 is heated. Heat the end of 56. At this time, if it is not determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the appropriate temperature range, the second heater 57bh is maintained in the current state.

In the heat hold mode n9, when the copy operation is completed in the above-mentioned copy mode, the ON state of the first heater 57ah and the second heater 57bh is kept at an arbitrary fixed time, for example, 60 by a timer routine (not shown). This is a mode in which the surface temperature of the heating rotary cylinder 56 is maintained at an arbitrary standby temperature lower than the appropriate temperature by controlling the time only for minutes so that the heating rotary cylinder 56 is not cooled at the same time as the end of the copy operation.

According to this mode, after the copying operation is finished, the surface temperature of the heating rotary cylinder 56 is kept at an arbitrary fixed time.
Since the temperature is maintained at an arbitrary standby temperature lower than the appropriate temperature, the heating time of the heating rotary cylinder 56 at the time of shifting to the copy operation again can be shortened and the power consumption can be saved.

In this heat hold mode, as shown in FIG. 8, the fluorescent lamp 16 is turned off (n33), the mode change request control routine n3 determines whether or not there is a mode change request (n34), and the mode change request control is performed. When it is determined by the routine n3 that a mode change request has been issued, it is determined whether the mode counter is set to "0" or "3" (n35), and the next mode suitable for the mode counter is entered.

Here, the mode change request control routine n3
If it is determined that there is no mode change request, the surface temperature control of the heating rotary cylinder 56 is started.

In FIG. 8, first, it is judged whether or not the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the standby temperature width (n36), and the surface temperature of the central portion of the heating rotary cylinder 56 stands by. When it is determined that the temperature is higher than the temperature range, the first heater 57ah is turned off (n37).

If it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the standby temperature width, the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the standby temperature width. If it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the standby temperature range, the first heater 57ah is turned on (n3).
9) Then, the central portion of the heating rotary cylinder 56 is heated. At this time, if it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the standby temperature width, the first heater 57
Keep ah in its current state.

Next, it is judged whether or not the surface temperature of the end portion of the heating rotary cylinder 56 is higher than the standby temperature width (n40), and the surface temperature of the end portion of the heating rotary cylinder 56 is higher than the standby temperature width. If it is determined to be high, the second heater 57bh is turned off (n41).

Here, when it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than the standby temperature width, the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the standby temperature width. If it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the standby temperature width, the second heater 57bh is turned on (n43) to determine whether or not the heating rotary cylinder 56 is heated. Heat the end of 56. At this time, if it is not determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than the standby temperature width, the second heater 57bh is maintained in the current state.

The auto shut-off mode n10 is managed by an unillustrated timer routine described in the heat hold mode n9 for an arbitrary fixed time, for example, 60 minutes, and when there is no mode change request for an arbitrary fixed time. This is a mode in which the power is saved by turning off the first heater 57ah and the second heater 57bh that require electric power.

In this auto shut-off mode, FIG.
As shown in, the fluorescent lamp 16 is turned off (n44), the mode change request control routine n3 determines whether there is a mode change request (n45), and the mode change request control routine n3 determines that there is no mode change request. In this case, the first heater 57ah and the second heater 57
bh is turned off (n46), and heating of the heating rotary cylinder 56 is completely stopped.

Here, the mode change request control routine n3
When it is determined that there is a mode change request by
The mode counter is set to "0" (n47) and the heat up mode (Fig. 6) is entered.

Next, an embodiment of the heating device according to the second aspect of the present invention will be described. Each control circuit for the fluorescent lamp 16 and each rod-shaped heating element 57a, 57b in this embodiment is constructed in substantially the same manner as that in the above-mentioned embodiment. However, in FIG. 3, the difference of this embodiment from the above-mentioned embodiment is that the first heat-generating portion of each rod-shaped heat generating element 57a, 57b is
The power consumption of the heater 57ah and the second heater 57bh is
In the onboard machine of the present embodiment, the maximum power that can be used for each is the first heater 57ah and the second heater 57.
bh is controlled to be turned on alternately.

The surface temperature of the heating rotary cylinder 56 in this embodiment is controlled based on a control program previously incorporated in the control device 104, that is, a flow chart shown in FIGS. Also, in Table 1 below,
The comparison table of the surface temperature of the heating rotary cylinder 56 in each mode of this embodiment and each step number of the flowcharts shown in FIGS. 10 to 15 is shown.

[0060]

[Table 1]

Each step (step number n101) in the main routine shown in FIG. 10 and the heater and fluorescent lamp control routine shown in FIG. 11 of the present embodiment.
To n110) are steps (step numbers n1 to n1) in the main routine shown in FIG. 4 and the heater and fluorescent lamp control routine shown in FIG.
Since it is the same as 0), the description thereof will be omitted.

Heat-up mode n107 shown in FIG.
Is a mode in which the first heater 57ah and the second heater 57bh are alternately turned on to heat the heating rotary cylinder 56 to an arbitrary temperature. At this time, the first heater 57ah and the second heater 57ah
The power consumption of each heater 57bh is the maximum rating of the heat generating portion.

In the heat-up mode n107, as shown in FIG. 12, the fluorescent lamp 16 is turned on (n111).
Then, it is judged whether or not the surface temperature of the central portion of the current heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible (n112).
If it is determined that the surface temperature of the central portion of the heating rotary cylinder is higher than an arbitrary appropriate temperature range capable of thermal development, the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range capable of thermal development. It is determined whether or not (n113).

Accordingly, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible, both the first heater 57ah and the second heater 57bh are turned off ( n114), and the heating rotary cylinder 56
Stop heating.

Here, when it is not determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than any appropriate temperature range in which heat development is possible, conversely, the surface of the end portion of the heating rotary cylinder 56 is opposite. It is determined whether the temperature is lower than an appropriate temperature range in which heat development is possible (n115).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah is turned off and the second heater 57bh is turned on. Turned on (n116), heating rotary cylinder 56
Heat the ends of.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah and the second heater 57bh are turned on. Both are turned off (n117), and the heating of the heating rotary cylinder 56 is stopped.

On the contrary, when it is not judged that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than any appropriate temperature range in which heat development is possible, conversely, the surface temperature of the central portion of the heating rotary cylinder 56 is reversed. However, it is determined whether the temperature is lower than an appropriate temperature range in which heat development is possible (n118).

Here, when it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, the surface temperature of the end portion of the heating rotary cylinder 56 is It was judged whether or not the temperature was higher than an arbitrary appropriate temperature range capable of developing (n119), and it was determined here that the surface temperature of the end portion of the heating rotary cylinder 56 was higher than the arbitrary temperature range allowing thermal development. In this case, the first heater 57ah is turned on and the second heater 57bh is turned off (n120) to heat the central portion of the heating rotary cylinder 56.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an appropriate temperature range in which heat development is possible, conversely, the end portion of the heating rotary cylinder 56 is reversed. It is determined whether the surface temperature of is lower than an appropriate temperature range in which heat development is possible (n121).

As a result, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, a timer routine (not shown) sets an arbitrary fixed time, for example, The flag is inverted (n122) every 2 seconds, and depending on the value of this flag, for example,
If this flag is "1", the first heater 57ah is turned on and the second heater 57bh is turned off (n12).
3) If the flag is "0", the first heater 57ah
And the second heater 57bh is turned on (n1
24)

Thus, the first heater 57ah and the second heater 57ah
The heater 57bh is alternately turned on to alternately heat the central portion and the end portion of the heating rotary cylinder 56, while heating the heating rotary cylinder 5
The surface temperature of the entire 6 is controlled so as to be within an appropriate temperature range in which heat development is possible.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah is turned on and the second heater 57ah is turned on. Turn off the heater 57bh (n125),
The central portion of the heating rotary cylinder 56 is heated.

If it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than any appropriate temperature range in which heat development is possible, the surface temperature of the end portion of the heating rotary cylinder 56 becomes It is judged whether or not the temperature is higher than an arbitrary appropriate temperature range in which development is possible (n126).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah and the second heater 57.
Both bh are turned off (n127), and heating of the heating rotary cylinder 56 is stopped.

On the other hand, when it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary proper temperature range in which heat development is possible, conversely, the surface of the end portion of the heating rotary cylinder 56. It is judged whether or not the temperature is lower than an appropriate temperature range in which heat development is possible (n128).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah is turned off and the second heater 57bh is turned on. Turned on (n129), heating rotating cylinder 56
Heat the ends of.

If it is not determined that the surface temperature of the end of the heating rotary cylinder 56 is lower than the appropriate temperature range, the mode counter is set to "1" (n13).
0) and enter the copy mode.

The copy mode (n108 in FIG. 11) is a mode in which actual copying is performed, and the fluorescent lamp 16 is turned on.
Further, the first heater 57ah is maintained so that the surface temperature of the heating rotary cylinder 56 is kept constant, for example, kept in an arbitrary appropriate temperature range.
In this mode, the second heater 57bh is alternately turned on.

In this copy mode, as shown in FIG. 13, the mode change request control routine n103 determines whether there is a mode change request (n131), and the mode change request control routine n103 determines that there is a mode change request. In the case, the mode counter is "2"
(N132) to set the heat hold mode n1
Other modes such as 09 are entered.

Here, the mode change request control routine n1
When it is determined that there is no mode change request in 03, the fluorescent lamp 16 is turned on (n133), and the surface temperature control of the heating rotary cylinder 56 is started.

In FIG. 13, first, it is judged whether or not the surface temperature of the central portion of the current heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible (n134).
When it is determined that the current surface temperature of the central portion of the heating rotary cylinder 56 is higher than any appropriate temperature range in which heat development is possible, the surface temperature of the end portion of the heating rotation cylinder 56 is arbitrary when heat development is possible. It is determined whether the temperature is higher than the appropriate temperature range (n135)
To do.

Accordingly, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an appropriate temperature range in which heat development is possible, both the first heater 57ah and the second heater 57bh are turned off ( n136), and the heating rotary cylinder 56
Stop heating.

Here, when it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible, conversely, the surface of the end portion of the heating rotary cylinder 56 is It is determined whether the temperature is lower than an appropriate temperature range in which heat development is possible (n137).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah is turned off and the second heater 57bh is turned on. Turned on (n138), heating rotating cylinder 56
Heat the ends of.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the first heater 57ah and the second heater 57bh are set. Both are turned off (n139), and the heating of the heating rotary cylinder 56 is stopped.

On the contrary, when it is not judged that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than an appropriate temperature range in which heat development is possible, conversely, the surface temperature of the central portion of the heating rotary cylinder 56 is reversed. However, it is determined (n140) whether the temperature is not lower than an appropriate temperature range in which heat development is possible.

Here, when it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than an arbitrary appropriate temperature range in which heat development is possible, the surface temperature of the end portion of the heating rotary cylinder 56 becomes It is determined whether or not the temperature is higher than an arbitrary appropriate temperature range in which development is possible (n141), and here it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary appropriate temperature range in which heat development is possible. In this case, the first heater 57ah is turned on and the second heater 57bh is turned off (n142) to heat the central portion of the heating rotary cylinder 56.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an appropriate temperature range in which heat development is possible, conversely, the end portion of the heating rotary cylinder 56 is reversed. It is determined whether the surface temperature of is lower than an appropriate temperature range in which heat development is possible (n143).

Accordingly, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, a timer routine (not shown) sets an arbitrary fixed time, for example, The flag is inverted (n144) every 2 seconds, and depending on the value of this flag, for example,
If this flag is "1", the first heater 57ah is turned on and the second heater 57bh is turned off (n14).
5) If the flag is "0", the first heater 57ah
And the second heater 57bh is turned on (n1
46)

Thus, the first heater 57ah and the second heater 57ah
The heater 57bh is alternately turned on to alternately heat the central portion and the end portion of the heating rotary cylinder 56, while heating the heating rotary cylinder 5
The surface temperature of the entire 6 is controlled so as to be within an appropriate temperature range in which heat development is possible.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, the first heater 57ah is turned on and the second heater 57ah is turned on. Turn off the heater 57bh (n147),
The central portion of the heating rotary cylinder 56 is heated.

If it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, the surface temperature of the end portion of the heating rotary cylinder 56 becomes It is determined whether or not the temperature is higher than an arbitrary appropriate temperature range in which development is possible (n148).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than any appropriate temperature range in which heat development is possible, the first heater 57ah and the second heater 57 are used.
Both bh are turned off (n149), and heating of the heating rotary cylinder 56 is stopped.

On the other hand, when it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an appropriate temperature range in which heat development is possible, conversely, the surface of the end portion of the heating rotary cylinder 56 is reversed. It is determined whether the temperature is lower than an appropriate temperature range in which heat development is possible (n150).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an appropriate temperature range in which heat development is possible, the first heater 57ah is turned off and the second heater 57bh is turned on. Turned on (n151), heating rotating cylinder 56
Heat the ends of.

The heat hold mode n109 is set to the first when the copy operation is completed in the above-mentioned copy mode.
When the heater 57ah and the second heater 57bh are turned on,
By a timer routine (not shown),
For example, the surface temperature of the heating rotary cylinder 56 is maintained at an arbitrary standby temperature lower than the proper temperature by controlling the time for 60 minutes,
In this mode, the heating rotary cylinder 56 is not cooled at the same time as the end of the copy operation.

According to this mode, after the copying operation is completed, the surface temperature of the heating rotary cylinder 56 is kept at an arbitrary fixed time.
Since the temperature is maintained at an arbitrary standby temperature lower than the appropriate temperature, the heating time of the heating rotary cylinder 56 at the time of shifting to the copy operation again can be shortened and the power consumption can be saved.

In this heat hold mode, as shown in FIG. 14, the fluorescent lamp 16 is turned off (n152), the mode change request control routine n103 determines whether or not there is a mode change request (n153), and the mode change request control is performed. When it is determined by the routine n103 that a mode change request is made, it is determined whether the mode counter is set to "0" or "3" (n154), and the next mode suitable for the mode counter is entered.

Here, the mode change request control routine n1
If it is determined that there is no mode change request in 03, the surface temperature control of the heating rotary cylinder 56 is started.

In FIG. 14, first, it is judged whether or not the surface temperature of the central portion of the current heating rotary cylinder 56 is higher than an arbitrary standby temperature width (n155), and here, the current heating rotary cylinder 56 is heated. When it is determined that the surface temperature of the central portion is higher than the arbitrary standby temperature width, it is determined whether the surface temperature of the end portion of the heating rotary cylinder 56 is higher than the arbitrary standby temperature width (n156). .

Accordingly, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary standby temperature width, both the first heater 57ah and the second heater 57bh are turned off (n157), The heating of the heating rotary cylinder 56 is stopped.

Here, when it is not judged that the surface temperature of the end of the heating rotary cylinder 56 is higher than an arbitrary standby temperature range, conversely, the surface temperature of the end of the heating rotary cylinder 56 is
It is judged whether it is lower than an arbitrary standby temperature range (n15
8) Do.

When it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary standby temperature width, the first heater 57ah is turned off and the second heater 57bh is turned off.
Is turned on (n159) to heat the end of the heating rotary cylinder 56.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary standby temperature width, the first heater 57ah and the second heater 57 are formed.
Both bh are turned off (n160), and the heating of the heating rotary cylinder 56 is stopped.

If it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is higher than the arbitrary standby temperature range, conversely, the surface temperature of the central portion of the heating rotary cylinder 56 is arbitrary. Determine whether it is lower than the standby temperature range (n1
61)

Here, when it is determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the arbitrary standby temperature range, the surface temperature of the end of the heating rotary cylinder 56 is determined to be the arbitrary standby temperature range. It is judged whether it is higher (n162), and here,
When it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary standby temperature width, the first heater 57ah
Is turned on, the second heater 57bh is turned off (n163), and the central portion of the heating rotary cylinder 56 is heated.

On the other hand, if it is not judged here that the surface temperature of the end of the heating rotary cylinder 56 is higher than an arbitrary standby temperature range, conversely, the surface temperature of the end of the heating rotary cylinder 56 is changed. , Whether the temperature is not lower than the specified standby temperature range (n
164).

As a result, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary standby temperature range, a timer routine (not shown) causes an arbitrary fixed time, for example, every 2 seconds. Invert flag (n165)
According to the value of this flag, for example, if this flag is "1", the first heater 57ah is turned on and the second heater 57bh is turned off (n166). If the flag is "0", the first heater 57ah is turned on. The first heater 57ah is turned off and the second heater 57bh is turned on (n167).

Thus, the first heater 57ah and the second heater 57ah
The heater 57bh is alternately turned on to alternately heat the central portion and the end portion of the heating rotary cylinder 56, while heating the heating rotary cylinder 5
The surface temperature of the whole 6 is controlled so as to be within an arbitrary standby temperature range.

On the other hand, if it is not determined here that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary standby temperature range, the first heater 57ah is turned on and the second heater 57bh is turned off. (N168), and the central portion of the heating rotary cylinder 56 is heated.

If it is not determined that the surface temperature of the central portion of the heating rotary cylinder 56 is lower than the arbitrary standby temperature width, the surface temperature of the end of the heating rotary cylinder 56 is determined to be the arbitrary standby temperature width. It is determined whether it is higher (n169).

Here, when it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary standby temperature range, both the first heater 57ah and the second heater 57bh are turned off (n170). The heating of the heating rotary cylinder 56 is stopped.

On the other hand, when it is not judged that the surface temperature of the end portion of the heating rotary cylinder 56 is higher than an arbitrary standby temperature width, conversely, the surface temperature of the end portion of the heating rotary cylinder 56 becomes
It is judged whether it is lower than an arbitrary standby temperature range (n17
1) Do.

When it is determined that the surface temperature of the end portion of the heating rotary cylinder 56 is lower than an arbitrary standby temperature range, the first heater 57ah is turned off and the second heater 57bh is turned off.
Is turned on (n172) to heat the end of the heating rotary cylinder 56.

The auto shut-off mode n110 is managed by an unillustrated timer routine described in the heat hold mode n109 for an arbitrary fixed time, for example, 60 minutes, and when there is no mode change request for an arbitrary fixed time. This is a mode in which the power is saved by turning off the first heater 57ah and the second heater 57bh that require electric power.

In this auto shut-off mode, as shown in FIG.
5, the fluorescent lamp 16 is turned off (n173)
Then, the mode change request control routine n103 determines whether there is a mode change request (n174), and when the mode change request control routine n103 determines that there is no mode change request, the first heater 57ah and the second heater 57bh. Is turned off (n175), and heating of the heating rotary cylinder 56 is completely stopped.

Here, the mode change request control routine n1
If it is determined by 03 that the mode change request has been issued, the mode counter is set to "0" (n176) and the heat-up mode (n107 in FIG. 11) is entered.

As described above, according to the first aspect of the invention, the first heater 57ah serving as the heat generating portion of each of the rod-shaped heat generating elements 57a and 57b, and the first heater 57ah according to the state (size, etc.) of the photosensitive paper 2 to be heated, Since the second heaters 57bh are controlled to be turned on / off independently of each other, the surface temperature in the width direction of the heating surface of the heating rotary cylinder 56 can be made uniform when copying a small size photosensitive paper. Prevents an excessive rise in the temperature of the heating surface outside the passing range of small size photosensitive paper,
It is possible to prevent damage to its peripheral parts, image quality of large size paper after continuous heating of small size paper, and heating rotary cylinder 5
It is possible to improve the heating efficiency of No. 6 and reduce the power consumption.

Further, according to the second aspect of the invention, the first heater 5 as the heat generating portion of each of the rod-shaped heat generating elements 57a and 57b.
Since the 7ah and the second heater 57bh are selectively turned on / off by the maximum power that can be used in the mounted machine, the heating efficiency according to the temperature condition of the heating surface of the heating rotary cylinder 56 is further improved. In addition, it is possible to quickly deal with uniformization of the surface temperature in the width direction of the heating surface.

[0121]

According to the present invention, the surface temperature in the width direction of the heating surface of the heating rotary cylinder can be made uniform when copying a small size photosensitive paper, and the passing range of this small size photosensitive paper can be made. Prevents excessive rise of the outside heating surface temperature,
It is possible to prevent damage to the peripheral parts.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a diazo copying machine according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view for explaining the configuration of the diazo copying machine.

FIG. 3 is a control circuit diagram of the fluorescent lamp and each rod-shaped heating element in the embodiment of the present invention.

FIG. 4 is a flowchart of a main routine of the control device in the embodiment of the present invention.

FIG. 5 is a flow chart of a heater and fluorescent lamp control routine of the control device in the embodiment of the present invention.

FIG. 6 is a flowchart of a heat-up mode of the control device according to the embodiment of the present invention.

FIG. 7 is a flowchart of a copy mode of the control device according to the embodiment of the present invention.

FIG. 8 is a flowchart of a heat hold mode of the control device according to the embodiment of the present invention.

FIG. 9 is a flowchart of the auto shut-off mode of the control device in the embodiment of the present invention.

FIG. 10 is a flowchart of a main routine of the control device in another embodiment of the present invention.

FIG. 11 is a flow chart of a heater and fluorescent lamp control routine of the control device in another embodiment of the present invention.

FIG. 12 is a flowchart of a heat-up mode of the control device according to another embodiment of the present invention.

FIG. 13 is a flowchart of a copy mode of the control device according to another embodiment of the present invention.

FIG. 14 is a flowchart of a heat hold mode of the control device according to another embodiment of the present invention.

FIG. 15 is a flowchart of an auto shut-off mode of the control device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Original 2 Sheet-shaped recording material (photosensitive paper) 16 Fluorescent lamp 56 Heating rotary cylinder 57a First rod-shaped heating element 57b Second rod-shaped heating element 57ah First heater 57bh Second heater 58a First temperature sensor 58b Second temperature sensor 59a 1st thermal fuse 59b 2nd thermal fuse 100 Fluorescent lamp lighting device 101,102,103 Relay 104 Control device E Development unit

Claims (2)

[Claims] 1. A heating rotating cylinder for heating a sheet-shaped recording material conveyed along a peripheral surface, and a first rotating inside of the heating rotating cylinder which can be turned on / off independently.
A sheet-shaped recording material heating device comprising a rod-shaped heating element and a second rod-shaped heating element, wherein the heating section of the first rod-shaped heating element and the heating section of the second rod-shaped heating element are A heating device for a sheet-shaped recording material, which is different from each other. 2. The first rod-shaped heating element and the second rod-shaped heating element each have a maximum power consumption that can be used in a mounting machine and are selectively on / off controlled. The heating device for the sheet-shaped recording material according to claim 1.